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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Authors:
4 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
5 * Uppsala University and
6 * Swedish University of Agricultural Sciences
7 *
8 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
9 * Ben Greear <greearb@candelatech.com>
10 * Jens Låås <jens.laas@data.slu.se>
11 *
12 * A tool for loading the network with preconfigurated packets.
13 * The tool is implemented as a linux module. Parameters are output
14 * device, delay (to hard_xmit), number of packets, and whether
15 * to use multiple SKBs or just the same one.
16 * pktgen uses the installed interface's output routine.
17 *
18 * Additional hacking by:
19 *
20 * Jens.Laas@data.slu.se
21 * Improved by ANK. 010120.
22 * Improved by ANK even more. 010212.
23 * MAC address typo fixed. 010417 --ro
24 * Integrated. 020301 --DaveM
25 * Added multiskb option 020301 --DaveM
26 * Scaling of results. 020417--sigurdur@linpro.no
27 * Significant re-work of the module:
28 * * Convert to threaded model to more efficiently be able to transmit
29 * and receive on multiple interfaces at once.
30 * * Converted many counters to __u64 to allow longer runs.
31 * * Allow configuration of ranges, like min/max IP address, MACs,
32 * and UDP-ports, for both source and destination, and can
33 * set to use a random distribution or sequentially walk the range.
34 * * Can now change most values after starting.
35 * * Place 12-byte packet in UDP payload with magic number,
36 * sequence number, and timestamp.
37 * * Add receiver code that detects dropped pkts, re-ordered pkts, and
38 * latencies (with micro-second) precision.
39 * * Add IOCTL interface to easily get counters & configuration.
40 * --Ben Greear <greearb@candelatech.com>
41 *
42 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
43 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
44 * as a "fastpath" with a configurable number of clones after alloc's.
45 * clone_skb=0 means all packets are allocated this also means ranges time
46 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
47 * clones.
48 *
49 * Also moved to /proc/net/pktgen/
50 * --ro
51 *
52 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
53 * mistakes. Also merged in DaveM's patch in the -pre6 patch.
54 * --Ben Greear <greearb@candelatech.com>
55 *
56 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
57 *
58 * 021124 Finished major redesign and rewrite for new functionality.
59 * See Documentation/networking/pktgen.rst for how to use this.
60 *
61 * The new operation:
62 * For each CPU one thread/process is created at start. This process checks
63 * for running devices in the if_list and sends packets until count is 0 it
64 * also the thread checks the thread->control which is used for inter-process
65 * communication. controlling process "posts" operations to the threads this
66 * way.
67 * The if_list is RCU protected, and the if_lock remains to protect updating
68 * of if_list, from "add_device" as it invoked from userspace (via proc write).
69 *
70 * By design there should only be *one* "controlling" process. In practice
71 * multiple write accesses gives unpredictable result. Understood by "write"
72 * to /proc gives result code thats should be read be the "writer".
73 * For practical use this should be no problem.
74 *
75 * Note when adding devices to a specific CPU there good idea to also assign
76 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
77 * --ro
78 *
79 * Fix refcount off by one if first packet fails, potential null deref,
80 * memleak 030710- KJP
81 *
82 * First "ranges" functionality for ipv6 030726 --ro
83 *
84 * Included flow support. 030802 ANK.
85 *
86 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
87 *
88 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
89 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
90 *
91 * New xmit() return, do_div and misc clean up by Stephen Hemminger
92 * <shemminger@osdl.org> 040923
93 *
94 * Randy Dunlap fixed u64 printk compiler warning
95 *
96 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
97 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
98 *
99 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
100 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
101 *
102 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
103 * 050103
104 *
105 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
106 *
107 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
108 *
109 * Fixed src_mac command to set source mac of packet to value specified in
110 * command by Adit Ranadive <adit.262@gmail.com>
111 */
112
113#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
114
115#include <linux/sys.h>
116#include <linux/types.h>
117#include <linux/module.h>
118#include <linux/moduleparam.h>
119#include <linux/kernel.h>
120#include <linux/mutex.h>
121#include <linux/sched.h>
122#include <linux/slab.h>
123#include <linux/vmalloc.h>
124#include <linux/unistd.h>
125#include <linux/string.h>
126#include <linux/ptrace.h>
127#include <linux/errno.h>
128#include <linux/ioport.h>
129#include <linux/interrupt.h>
130#include <linux/capability.h>
131#include <linux/hrtimer.h>
132#include <linux/freezer.h>
133#include <linux/delay.h>
134#include <linux/timer.h>
135#include <linux/list.h>
136#include <linux/init.h>
137#include <linux/skbuff.h>
138#include <linux/netdevice.h>
139#include <linux/inet.h>
140#include <linux/inetdevice.h>
141#include <linux/rtnetlink.h>
142#include <linux/if_arp.h>
143#include <linux/if_vlan.h>
144#include <linux/in.h>
145#include <linux/ip.h>
146#include <linux/ipv6.h>
147#include <linux/udp.h>
148#include <linux/proc_fs.h>
149#include <linux/seq_file.h>
150#include <linux/wait.h>
151#include <linux/etherdevice.h>
152#include <linux/kthread.h>
153#include <linux/prefetch.h>
154#include <linux/mmzone.h>
155#include <net/net_namespace.h>
156#include <net/checksum.h>
157#include <net/ipv6.h>
158#include <net/udp.h>
159#include <net/ip6_checksum.h>
160#include <net/addrconf.h>
161#ifdef CONFIG_XFRM
162#include <net/xfrm.h>
163#endif
164#include <net/netns/generic.h>
165#include <asm/byteorder.h>
166#include <linux/rcupdate.h>
167#include <linux/bitops.h>
168#include <linux/io.h>
169#include <linux/timex.h>
170#include <linux/uaccess.h>
171#include <asm/dma.h>
172#include <asm/div64.h> /* do_div */
173
174#define VERSION "2.75"
175#define IP_NAME_SZ 32
176#define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
177#define MPLS_STACK_BOTTOM htonl(0x00000100)
178
179#define func_enter() pr_debug("entering %s\n", __func__);
180
181#define PKT_FLAGS \
182 pf(IPV6) /* Interface in IPV6 Mode */ \
183 pf(IPSRC_RND) /* IP-Src Random */ \
184 pf(IPDST_RND) /* IP-Dst Random */ \
185 pf(TXSIZE_RND) /* Transmit size is random */ \
186 pf(UDPSRC_RND) /* UDP-Src Random */ \
187 pf(UDPDST_RND) /* UDP-Dst Random */ \
188 pf(UDPCSUM) /* Include UDP checksum */ \
189 pf(NO_TIMESTAMP) /* Don't timestamp packets (default TS) */ \
190 pf(MPLS_RND) /* Random MPLS labels */ \
191 pf(QUEUE_MAP_RND) /* queue map Random */ \
192 pf(QUEUE_MAP_CPU) /* queue map mirrors smp_processor_id() */ \
193 pf(FLOW_SEQ) /* Sequential flows */ \
194 pf(IPSEC) /* ipsec on for flows */ \
195 pf(MACSRC_RND) /* MAC-Src Random */ \
196 pf(MACDST_RND) /* MAC-Dst Random */ \
197 pf(VID_RND) /* Random VLAN ID */ \
198 pf(SVID_RND) /* Random SVLAN ID */ \
199 pf(NODE) /* Node memory alloc*/ \
200
201#define pf(flag) flag##_SHIFT,
202enum pkt_flags {
203 PKT_FLAGS
204};
205#undef pf
206
207/* Device flag bits */
208#define pf(flag) static const __u32 F_##flag = (1<<flag##_SHIFT);
209PKT_FLAGS
210#undef pf
211
212#define pf(flag) __stringify(flag),
213static char *pkt_flag_names[] = {
214 PKT_FLAGS
215};
216#undef pf
217
218#define NR_PKT_FLAGS ARRAY_SIZE(pkt_flag_names)
219
220/* Thread control flag bits */
221#define T_STOP (1<<0) /* Stop run */
222#define T_RUN (1<<1) /* Start run */
223#define T_REMDEVALL (1<<2) /* Remove all devs */
224#define T_REMDEV (1<<3) /* Remove one dev */
225
226/* Xmit modes */
227#define M_START_XMIT 0 /* Default normal TX */
228#define M_NETIF_RECEIVE 1 /* Inject packets into stack */
229#define M_QUEUE_XMIT 2 /* Inject packet into qdisc */
230
231/* If lock -- protects updating of if_list */
232#define if_lock(t) mutex_lock(&(t->if_lock));
233#define if_unlock(t) mutex_unlock(&(t->if_lock));
234
235/* Used to help with determining the pkts on receive */
236#define PKTGEN_MAGIC 0xbe9be955
237#define PG_PROC_DIR "pktgen"
238#define PGCTRL "pgctrl"
239
240#define MAX_CFLOWS 65536
241
242#define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
243#define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
244
245struct flow_state {
246 __be32 cur_daddr;
247 int count;
248#ifdef CONFIG_XFRM
249 struct xfrm_state *x;
250#endif
251 __u32 flags;
252};
253
254/* flow flag bits */
255#define F_INIT (1<<0) /* flow has been initialized */
256
257struct pktgen_dev {
258 /*
259 * Try to keep frequent/infrequent used vars. separated.
260 */
261 struct proc_dir_entry *entry; /* proc file */
262 struct pktgen_thread *pg_thread;/* the owner */
263 struct list_head list; /* chaining in the thread's run-queue */
264 struct rcu_head rcu; /* freed by RCU */
265
266 int running; /* if false, the test will stop */
267
268 /* If min != max, then we will either do a linear iteration, or
269 * we will do a random selection from within the range.
270 */
271 __u32 flags;
272 int xmit_mode;
273 int min_pkt_size;
274 int max_pkt_size;
275 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
276 int nfrags;
277 int removal_mark; /* non-zero => the device is marked for
278 * removal by worker thread */
279
280 struct page *page;
281 u64 delay; /* nano-seconds */
282
283 __u64 count; /* Default No packets to send */
284 __u64 sofar; /* How many pkts we've sent so far */
285 __u64 tx_bytes; /* How many bytes we've transmitted */
286 __u64 errors; /* Errors when trying to transmit, */
287
288 /* runtime counters relating to clone_skb */
289
290 __u32 clone_count;
291 int last_ok; /* Was last skb sent?
292 * Or a failed transmit of some sort?
293 * This will keep sequence numbers in order
294 */
295 ktime_t next_tx;
296 ktime_t started_at;
297 ktime_t stopped_at;
298 u64 idle_acc; /* nano-seconds */
299
300 __u32 seq_num;
301
302 int clone_skb; /*
303 * Use multiple SKBs during packet gen.
304 * If this number is greater than 1, then
305 * that many copies of the same packet will be
306 * sent before a new packet is allocated.
307 * If you want to send 1024 identical packets
308 * before creating a new packet,
309 * set clone_skb to 1024.
310 */
311
312 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
313 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
314 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
315 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
316
317 struct in6_addr in6_saddr;
318 struct in6_addr in6_daddr;
319 struct in6_addr cur_in6_daddr;
320 struct in6_addr cur_in6_saddr;
321 /* For ranges */
322 struct in6_addr min_in6_daddr;
323 struct in6_addr max_in6_daddr;
324 struct in6_addr min_in6_saddr;
325 struct in6_addr max_in6_saddr;
326
327 /* If we're doing ranges, random or incremental, then this
328 * defines the min/max for those ranges.
329 */
330 __be32 saddr_min; /* inclusive, source IP address */
331 __be32 saddr_max; /* exclusive, source IP address */
332 __be32 daddr_min; /* inclusive, dest IP address */
333 __be32 daddr_max; /* exclusive, dest IP address */
334
335 __u16 udp_src_min; /* inclusive, source UDP port */
336 __u16 udp_src_max; /* exclusive, source UDP port */
337 __u16 udp_dst_min; /* inclusive, dest UDP port */
338 __u16 udp_dst_max; /* exclusive, dest UDP port */
339
340 /* DSCP + ECN */
341 __u8 tos; /* six MSB of (former) IPv4 TOS
342 are for dscp codepoint */
343 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
344 (see RFC 3260, sec. 4) */
345
346 /* MPLS */
347 unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */
348 __be32 labels[MAX_MPLS_LABELS];
349
350 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
351 __u8 vlan_p;
352 __u8 vlan_cfi;
353 __u16 vlan_id; /* 0xffff means no vlan tag */
354
355 __u8 svlan_p;
356 __u8 svlan_cfi;
357 __u16 svlan_id; /* 0xffff means no svlan tag */
358
359 __u32 src_mac_count; /* How many MACs to iterate through */
360 __u32 dst_mac_count; /* How many MACs to iterate through */
361
362 unsigned char dst_mac[ETH_ALEN];
363 unsigned char src_mac[ETH_ALEN];
364
365 __u32 cur_dst_mac_offset;
366 __u32 cur_src_mac_offset;
367 __be32 cur_saddr;
368 __be32 cur_daddr;
369 __u16 ip_id;
370 __u16 cur_udp_dst;
371 __u16 cur_udp_src;
372 __u16 cur_queue_map;
373 __u32 cur_pkt_size;
374 __u32 last_pkt_size;
375
376 __u8 hh[14];
377 /* = {
378 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
379
380 We fill in SRC address later
381 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
382 0x08, 0x00
383 };
384 */
385 __u16 pad; /* pad out the hh struct to an even 16 bytes */
386
387 struct sk_buff *skb; /* skb we are to transmit next, used for when we
388 * are transmitting the same one multiple times
389 */
390 struct net_device *odev; /* The out-going device.
391 * Note that the device should have it's
392 * pg_info pointer pointing back to this
393 * device.
394 * Set when the user specifies the out-going
395 * device name (not when the inject is
396 * started as it used to do.)
397 */
398 char odevname[32];
399 struct flow_state *flows;
400 unsigned int cflows; /* Concurrent flows (config) */
401 unsigned int lflow; /* Flow length (config) */
402 unsigned int nflows; /* accumulated flows (stats) */
403 unsigned int curfl; /* current sequenced flow (state)*/
404
405 u16 queue_map_min;
406 u16 queue_map_max;
407 __u32 skb_priority; /* skb priority field */
408 unsigned int burst; /* number of duplicated packets to burst */
409 int node; /* Memory node */
410
411#ifdef CONFIG_XFRM
412 __u8 ipsmode; /* IPSEC mode (config) */
413 __u8 ipsproto; /* IPSEC type (config) */
414 __u32 spi;
415 struct xfrm_dst xdst;
416 struct dst_ops dstops;
417#endif
418 char result[512];
419};
420
421struct pktgen_hdr {
422 __be32 pgh_magic;
423 __be32 seq_num;
424 __be32 tv_sec;
425 __be32 tv_usec;
426};
427
428
429static unsigned int pg_net_id __read_mostly;
430
431struct pktgen_net {
432 struct net *net;
433 struct proc_dir_entry *proc_dir;
434 struct list_head pktgen_threads;
435 bool pktgen_exiting;
436};
437
438struct pktgen_thread {
439 struct mutex if_lock; /* for list of devices */
440 struct list_head if_list; /* All device here */
441 struct list_head th_list;
442 struct task_struct *tsk;
443 char result[512];
444
445 /* Field for thread to receive "posted" events terminate,
446 stop ifs etc. */
447
448 u32 control;
449 int cpu;
450
451 wait_queue_head_t queue;
452 struct completion start_done;
453 struct pktgen_net *net;
454};
455
456#define REMOVE 1
457#define FIND 0
458
459static const char version[] =
460 "Packet Generator for packet performance testing. "
461 "Version: " VERSION "\n";
462
463static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
464static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
465static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
466 const char *ifname, bool exact);
467static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
468static void pktgen_run_all_threads(struct pktgen_net *pn);
469static void pktgen_reset_all_threads(struct pktgen_net *pn);
470static void pktgen_stop_all_threads(struct pktgen_net *pn);
471
472static void pktgen_stop(struct pktgen_thread *t);
473static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
474
475/* Module parameters, defaults. */
476static int pg_count_d __read_mostly = 1000;
477static int pg_delay_d __read_mostly;
478static int pg_clone_skb_d __read_mostly;
479static int debug __read_mostly;
480
481static DEFINE_MUTEX(pktgen_thread_lock);
482
483static struct notifier_block pktgen_notifier_block = {
484 .notifier_call = pktgen_device_event,
485};
486
487/*
488 * /proc handling functions
489 *
490 */
491
492static int pgctrl_show(struct seq_file *seq, void *v)
493{
494 seq_puts(seq, version);
495 return 0;
496}
497
498static ssize_t pgctrl_write(struct file *file, const char __user *buf,
499 size_t count, loff_t *ppos)
500{
501 char data[128];
502 struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
503
504 if (!capable(CAP_NET_ADMIN))
505 return -EPERM;
506
507 if (count == 0)
508 return -EINVAL;
509
510 if (count > sizeof(data))
511 count = sizeof(data);
512
513 if (copy_from_user(data, buf, count))
514 return -EFAULT;
515
516 data[count - 1] = 0; /* Strip trailing '\n' and terminate string */
517
518 if (!strcmp(data, "stop"))
519 pktgen_stop_all_threads(pn);
520 else if (!strcmp(data, "start"))
521 pktgen_run_all_threads(pn);
522 else if (!strcmp(data, "reset"))
523 pktgen_reset_all_threads(pn);
524 else
525 return -EINVAL;
526
527 return count;
528}
529
530static int pgctrl_open(struct inode *inode, struct file *file)
531{
532 return single_open(file, pgctrl_show, PDE_DATA(inode));
533}
534
535static const struct proc_ops pktgen_proc_ops = {
536 .proc_open = pgctrl_open,
537 .proc_read = seq_read,
538 .proc_lseek = seq_lseek,
539 .proc_write = pgctrl_write,
540 .proc_release = single_release,
541};
542
543static int pktgen_if_show(struct seq_file *seq, void *v)
544{
545 const struct pktgen_dev *pkt_dev = seq->private;
546 ktime_t stopped;
547 unsigned int i;
548 u64 idle;
549
550 seq_printf(seq,
551 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
552 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
553 pkt_dev->max_pkt_size);
554
555 seq_printf(seq,
556 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
557 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
558 pkt_dev->clone_skb, pkt_dev->odevname);
559
560 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
561 pkt_dev->lflow);
562
563 seq_printf(seq,
564 " queue_map_min: %u queue_map_max: %u\n",
565 pkt_dev->queue_map_min,
566 pkt_dev->queue_map_max);
567
568 if (pkt_dev->skb_priority)
569 seq_printf(seq, " skb_priority: %u\n",
570 pkt_dev->skb_priority);
571
572 if (pkt_dev->flags & F_IPV6) {
573 seq_printf(seq,
574 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
575 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
576 &pkt_dev->in6_saddr,
577 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
578 &pkt_dev->in6_daddr,
579 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
580 } else {
581 seq_printf(seq,
582 " dst_min: %s dst_max: %s\n",
583 pkt_dev->dst_min, pkt_dev->dst_max);
584 seq_printf(seq,
585 " src_min: %s src_max: %s\n",
586 pkt_dev->src_min, pkt_dev->src_max);
587 }
588
589 seq_puts(seq, " src_mac: ");
590
591 seq_printf(seq, "%pM ",
592 is_zero_ether_addr(pkt_dev->src_mac) ?
593 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
594
595 seq_puts(seq, "dst_mac: ");
596 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
597
598 seq_printf(seq,
599 " udp_src_min: %d udp_src_max: %d"
600 " udp_dst_min: %d udp_dst_max: %d\n",
601 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
602 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
603
604 seq_printf(seq,
605 " src_mac_count: %d dst_mac_count: %d\n",
606 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
607
608 if (pkt_dev->nr_labels) {
609 seq_puts(seq, " mpls: ");
610 for (i = 0; i < pkt_dev->nr_labels; i++)
611 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
612 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
613 }
614
615 if (pkt_dev->vlan_id != 0xffff)
616 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
617 pkt_dev->vlan_id, pkt_dev->vlan_p,
618 pkt_dev->vlan_cfi);
619
620 if (pkt_dev->svlan_id != 0xffff)
621 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
622 pkt_dev->svlan_id, pkt_dev->svlan_p,
623 pkt_dev->svlan_cfi);
624
625 if (pkt_dev->tos)
626 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
627
628 if (pkt_dev->traffic_class)
629 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
630
631 if (pkt_dev->burst > 1)
632 seq_printf(seq, " burst: %d\n", pkt_dev->burst);
633
634 if (pkt_dev->node >= 0)
635 seq_printf(seq, " node: %d\n", pkt_dev->node);
636
637 if (pkt_dev->xmit_mode == M_NETIF_RECEIVE)
638 seq_puts(seq, " xmit_mode: netif_receive\n");
639 else if (pkt_dev->xmit_mode == M_QUEUE_XMIT)
640 seq_puts(seq, " xmit_mode: xmit_queue\n");
641
642 seq_puts(seq, " Flags: ");
643
644 for (i = 0; i < NR_PKT_FLAGS; i++) {
645 if (i == F_FLOW_SEQ)
646 if (!pkt_dev->cflows)
647 continue;
648
649 if (pkt_dev->flags & (1 << i))
650 seq_printf(seq, "%s ", pkt_flag_names[i]);
651 else if (i == F_FLOW_SEQ)
652 seq_puts(seq, "FLOW_RND ");
653
654#ifdef CONFIG_XFRM
655 if (i == F_IPSEC && pkt_dev->spi)
656 seq_printf(seq, "spi:%u", pkt_dev->spi);
657#endif
658 }
659
660 seq_puts(seq, "\n");
661
662 /* not really stopped, more like last-running-at */
663 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at;
664 idle = pkt_dev->idle_acc;
665 do_div(idle, NSEC_PER_USEC);
666
667 seq_printf(seq,
668 "Current:\n pkts-sofar: %llu errors: %llu\n",
669 (unsigned long long)pkt_dev->sofar,
670 (unsigned long long)pkt_dev->errors);
671
672 seq_printf(seq,
673 " started: %lluus stopped: %lluus idle: %lluus\n",
674 (unsigned long long) ktime_to_us(pkt_dev->started_at),
675 (unsigned long long) ktime_to_us(stopped),
676 (unsigned long long) idle);
677
678 seq_printf(seq,
679 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
680 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
681 pkt_dev->cur_src_mac_offset);
682
683 if (pkt_dev->flags & F_IPV6) {
684 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
685 &pkt_dev->cur_in6_saddr,
686 &pkt_dev->cur_in6_daddr);
687 } else
688 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n",
689 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
690
691 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
692 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
693
694 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
695
696 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
697
698 if (pkt_dev->result[0])
699 seq_printf(seq, "Result: %s\n", pkt_dev->result);
700 else
701 seq_puts(seq, "Result: Idle\n");
702
703 return 0;
704}
705
706
707static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
708 __u32 *num)
709{
710 int i = 0;
711 *num = 0;
712
713 for (; i < maxlen; i++) {
714 int value;
715 char c;
716 *num <<= 4;
717 if (get_user(c, &user_buffer[i]))
718 return -EFAULT;
719 value = hex_to_bin(c);
720 if (value >= 0)
721 *num |= value;
722 else
723 break;
724 }
725 return i;
726}
727
728static int count_trail_chars(const char __user * user_buffer,
729 unsigned int maxlen)
730{
731 int i;
732
733 for (i = 0; i < maxlen; i++) {
734 char c;
735 if (get_user(c, &user_buffer[i]))
736 return -EFAULT;
737 switch (c) {
738 case '\"':
739 case '\n':
740 case '\r':
741 case '\t':
742 case ' ':
743 case '=':
744 break;
745 default:
746 goto done;
747 }
748 }
749done:
750 return i;
751}
752
753static long num_arg(const char __user *user_buffer, unsigned long maxlen,
754 unsigned long *num)
755{
756 int i;
757 *num = 0;
758
759 for (i = 0; i < maxlen; i++) {
760 char c;
761 if (get_user(c, &user_buffer[i]))
762 return -EFAULT;
763 if ((c >= '0') && (c <= '9')) {
764 *num *= 10;
765 *num += c - '0';
766 } else
767 break;
768 }
769 return i;
770}
771
772static int strn_len(const char __user * user_buffer, unsigned int maxlen)
773{
774 int i;
775
776 for (i = 0; i < maxlen; i++) {
777 char c;
778 if (get_user(c, &user_buffer[i]))
779 return -EFAULT;
780 switch (c) {
781 case '\"':
782 case '\n':
783 case '\r':
784 case '\t':
785 case ' ':
786 goto done_str;
787 default:
788 break;
789 }
790 }
791done_str:
792 return i;
793}
794
795static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
796{
797 unsigned int n = 0;
798 char c;
799 ssize_t i = 0;
800 int len;
801
802 pkt_dev->nr_labels = 0;
803 do {
804 __u32 tmp;
805 len = hex32_arg(&buffer[i], 8, &tmp);
806 if (len <= 0)
807 return len;
808 pkt_dev->labels[n] = htonl(tmp);
809 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
810 pkt_dev->flags |= F_MPLS_RND;
811 i += len;
812 if (get_user(c, &buffer[i]))
813 return -EFAULT;
814 i++;
815 n++;
816 if (n >= MAX_MPLS_LABELS)
817 return -E2BIG;
818 } while (c == ',');
819
820 pkt_dev->nr_labels = n;
821 return i;
822}
823
824static __u32 pktgen_read_flag(const char *f, bool *disable)
825{
826 __u32 i;
827
828 if (f[0] == '!') {
829 *disable = true;
830 f++;
831 }
832
833 for (i = 0; i < NR_PKT_FLAGS; i++) {
834 if (!IS_ENABLED(CONFIG_XFRM) && i == IPSEC_SHIFT)
835 continue;
836
837 /* allow only disabling ipv6 flag */
838 if (!*disable && i == IPV6_SHIFT)
839 continue;
840
841 if (strcmp(f, pkt_flag_names[i]) == 0)
842 return 1 << i;
843 }
844
845 if (strcmp(f, "FLOW_RND") == 0) {
846 *disable = !*disable;
847 return F_FLOW_SEQ;
848 }
849
850 return 0;
851}
852
853static ssize_t pktgen_if_write(struct file *file,
854 const char __user * user_buffer, size_t count,
855 loff_t * offset)
856{
857 struct seq_file *seq = file->private_data;
858 struct pktgen_dev *pkt_dev = seq->private;
859 int i, max, len;
860 char name[16], valstr[32];
861 unsigned long value = 0;
862 char *pg_result = NULL;
863 int tmp = 0;
864 char buf[128];
865
866 pg_result = &(pkt_dev->result[0]);
867
868 if (count < 1) {
869 pr_warn("wrong command format\n");
870 return -EINVAL;
871 }
872
873 max = count;
874 tmp = count_trail_chars(user_buffer, max);
875 if (tmp < 0) {
876 pr_warn("illegal format\n");
877 return tmp;
878 }
879 i = tmp;
880
881 /* Read variable name */
882
883 len = strn_len(&user_buffer[i], sizeof(name) - 1);
884 if (len < 0)
885 return len;
886
887 memset(name, 0, sizeof(name));
888 if (copy_from_user(name, &user_buffer[i], len))
889 return -EFAULT;
890 i += len;
891
892 max = count - i;
893 len = count_trail_chars(&user_buffer[i], max);
894 if (len < 0)
895 return len;
896
897 i += len;
898
899 if (debug) {
900 size_t copy = min_t(size_t, count + 1, 1024);
901 char *tp = strndup_user(user_buffer, copy);
902
903 if (IS_ERR(tp))
904 return PTR_ERR(tp);
905
906 pr_debug("%s,%zu buffer -:%s:-\n", name, count, tp);
907 kfree(tp);
908 }
909
910 if (!strcmp(name, "min_pkt_size")) {
911 len = num_arg(&user_buffer[i], 10, &value);
912 if (len < 0)
913 return len;
914
915 i += len;
916 if (value < 14 + 20 + 8)
917 value = 14 + 20 + 8;
918 if (value != pkt_dev->min_pkt_size) {
919 pkt_dev->min_pkt_size = value;
920 pkt_dev->cur_pkt_size = value;
921 }
922 sprintf(pg_result, "OK: min_pkt_size=%d",
923 pkt_dev->min_pkt_size);
924 return count;
925 }
926
927 if (!strcmp(name, "max_pkt_size")) {
928 len = num_arg(&user_buffer[i], 10, &value);
929 if (len < 0)
930 return len;
931
932 i += len;
933 if (value < 14 + 20 + 8)
934 value = 14 + 20 + 8;
935 if (value != pkt_dev->max_pkt_size) {
936 pkt_dev->max_pkt_size = value;
937 pkt_dev->cur_pkt_size = value;
938 }
939 sprintf(pg_result, "OK: max_pkt_size=%d",
940 pkt_dev->max_pkt_size);
941 return count;
942 }
943
944 /* Shortcut for min = max */
945
946 if (!strcmp(name, "pkt_size")) {
947 len = num_arg(&user_buffer[i], 10, &value);
948 if (len < 0)
949 return len;
950
951 i += len;
952 if (value < 14 + 20 + 8)
953 value = 14 + 20 + 8;
954 if (value != pkt_dev->min_pkt_size) {
955 pkt_dev->min_pkt_size = value;
956 pkt_dev->max_pkt_size = value;
957 pkt_dev->cur_pkt_size = value;
958 }
959 sprintf(pg_result, "OK: pkt_size=%d", pkt_dev->min_pkt_size);
960 return count;
961 }
962
963 if (!strcmp(name, "debug")) {
964 len = num_arg(&user_buffer[i], 10, &value);
965 if (len < 0)
966 return len;
967
968 i += len;
969 debug = value;
970 sprintf(pg_result, "OK: debug=%u", debug);
971 return count;
972 }
973
974 if (!strcmp(name, "frags")) {
975 len = num_arg(&user_buffer[i], 10, &value);
976 if (len < 0)
977 return len;
978
979 i += len;
980 pkt_dev->nfrags = value;
981 sprintf(pg_result, "OK: frags=%d", pkt_dev->nfrags);
982 return count;
983 }
984 if (!strcmp(name, "delay")) {
985 len = num_arg(&user_buffer[i], 10, &value);
986 if (len < 0)
987 return len;
988
989 i += len;
990 if (value == 0x7FFFFFFF)
991 pkt_dev->delay = ULLONG_MAX;
992 else
993 pkt_dev->delay = (u64)value;
994
995 sprintf(pg_result, "OK: delay=%llu",
996 (unsigned long long) pkt_dev->delay);
997 return count;
998 }
999 if (!strcmp(name, "rate")) {
1000 len = num_arg(&user_buffer[i], 10, &value);
1001 if (len < 0)
1002 return len;
1003
1004 i += len;
1005 if (!value)
1006 return len;
1007 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
1008 if (debug)
1009 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1010
1011 sprintf(pg_result, "OK: rate=%lu", value);
1012 return count;
1013 }
1014 if (!strcmp(name, "ratep")) {
1015 len = num_arg(&user_buffer[i], 10, &value);
1016 if (len < 0)
1017 return len;
1018
1019 i += len;
1020 if (!value)
1021 return len;
1022 pkt_dev->delay = NSEC_PER_SEC/value;
1023 if (debug)
1024 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1025
1026 sprintf(pg_result, "OK: rate=%lu", value);
1027 return count;
1028 }
1029 if (!strcmp(name, "udp_src_min")) {
1030 len = num_arg(&user_buffer[i], 10, &value);
1031 if (len < 0)
1032 return len;
1033
1034 i += len;
1035 if (value != pkt_dev->udp_src_min) {
1036 pkt_dev->udp_src_min = value;
1037 pkt_dev->cur_udp_src = value;
1038 }
1039 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1040 return count;
1041 }
1042 if (!strcmp(name, "udp_dst_min")) {
1043 len = num_arg(&user_buffer[i], 10, &value);
1044 if (len < 0)
1045 return len;
1046
1047 i += len;
1048 if (value != pkt_dev->udp_dst_min) {
1049 pkt_dev->udp_dst_min = value;
1050 pkt_dev->cur_udp_dst = value;
1051 }
1052 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1053 return count;
1054 }
1055 if (!strcmp(name, "udp_src_max")) {
1056 len = num_arg(&user_buffer[i], 10, &value);
1057 if (len < 0)
1058 return len;
1059
1060 i += len;
1061 if (value != pkt_dev->udp_src_max) {
1062 pkt_dev->udp_src_max = value;
1063 pkt_dev->cur_udp_src = value;
1064 }
1065 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1066 return count;
1067 }
1068 if (!strcmp(name, "udp_dst_max")) {
1069 len = num_arg(&user_buffer[i], 10, &value);
1070 if (len < 0)
1071 return len;
1072
1073 i += len;
1074 if (value != pkt_dev->udp_dst_max) {
1075 pkt_dev->udp_dst_max = value;
1076 pkt_dev->cur_udp_dst = value;
1077 }
1078 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1079 return count;
1080 }
1081 if (!strcmp(name, "clone_skb")) {
1082 len = num_arg(&user_buffer[i], 10, &value);
1083 if (len < 0)
1084 return len;
1085 if ((value > 0) &&
1086 ((pkt_dev->xmit_mode == M_NETIF_RECEIVE) ||
1087 !(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1088 return -ENOTSUPP;
1089 i += len;
1090 pkt_dev->clone_skb = value;
1091
1092 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1093 return count;
1094 }
1095 if (!strcmp(name, "count")) {
1096 len = num_arg(&user_buffer[i], 10, &value);
1097 if (len < 0)
1098 return len;
1099
1100 i += len;
1101 pkt_dev->count = value;
1102 sprintf(pg_result, "OK: count=%llu",
1103 (unsigned long long)pkt_dev->count);
1104 return count;
1105 }
1106 if (!strcmp(name, "src_mac_count")) {
1107 len = num_arg(&user_buffer[i], 10, &value);
1108 if (len < 0)
1109 return len;
1110
1111 i += len;
1112 if (pkt_dev->src_mac_count != value) {
1113 pkt_dev->src_mac_count = value;
1114 pkt_dev->cur_src_mac_offset = 0;
1115 }
1116 sprintf(pg_result, "OK: src_mac_count=%d",
1117 pkt_dev->src_mac_count);
1118 return count;
1119 }
1120 if (!strcmp(name, "dst_mac_count")) {
1121 len = num_arg(&user_buffer[i], 10, &value);
1122 if (len < 0)
1123 return len;
1124
1125 i += len;
1126 if (pkt_dev->dst_mac_count != value) {
1127 pkt_dev->dst_mac_count = value;
1128 pkt_dev->cur_dst_mac_offset = 0;
1129 }
1130 sprintf(pg_result, "OK: dst_mac_count=%d",
1131 pkt_dev->dst_mac_count);
1132 return count;
1133 }
1134 if (!strcmp(name, "burst")) {
1135 len = num_arg(&user_buffer[i], 10, &value);
1136 if (len < 0)
1137 return len;
1138
1139 i += len;
1140 if ((value > 1) &&
1141 ((pkt_dev->xmit_mode == M_QUEUE_XMIT) ||
1142 ((pkt_dev->xmit_mode == M_START_XMIT) &&
1143 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))))
1144 return -ENOTSUPP;
1145 pkt_dev->burst = value < 1 ? 1 : value;
1146 sprintf(pg_result, "OK: burst=%u", pkt_dev->burst);
1147 return count;
1148 }
1149 if (!strcmp(name, "node")) {
1150 len = num_arg(&user_buffer[i], 10, &value);
1151 if (len < 0)
1152 return len;
1153
1154 i += len;
1155
1156 if (node_possible(value)) {
1157 pkt_dev->node = value;
1158 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1159 if (pkt_dev->page) {
1160 put_page(pkt_dev->page);
1161 pkt_dev->page = NULL;
1162 }
1163 }
1164 else
1165 sprintf(pg_result, "ERROR: node not possible");
1166 return count;
1167 }
1168 if (!strcmp(name, "xmit_mode")) {
1169 char f[32];
1170
1171 memset(f, 0, 32);
1172 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1173 if (len < 0)
1174 return len;
1175
1176 if (copy_from_user(f, &user_buffer[i], len))
1177 return -EFAULT;
1178 i += len;
1179
1180 if (strcmp(f, "start_xmit") == 0) {
1181 pkt_dev->xmit_mode = M_START_XMIT;
1182 } else if (strcmp(f, "netif_receive") == 0) {
1183 /* clone_skb set earlier, not supported in this mode */
1184 if (pkt_dev->clone_skb > 0)
1185 return -ENOTSUPP;
1186
1187 pkt_dev->xmit_mode = M_NETIF_RECEIVE;
1188
1189 /* make sure new packet is allocated every time
1190 * pktgen_xmit() is called
1191 */
1192 pkt_dev->last_ok = 1;
1193
1194 /* override clone_skb if user passed default value
1195 * at module loading time
1196 */
1197 pkt_dev->clone_skb = 0;
1198 } else if (strcmp(f, "queue_xmit") == 0) {
1199 pkt_dev->xmit_mode = M_QUEUE_XMIT;
1200 pkt_dev->last_ok = 1;
1201 } else {
1202 sprintf(pg_result,
1203 "xmit_mode -:%s:- unknown\nAvailable modes: %s",
1204 f, "start_xmit, netif_receive\n");
1205 return count;
1206 }
1207 sprintf(pg_result, "OK: xmit_mode=%s", f);
1208 return count;
1209 }
1210 if (!strcmp(name, "flag")) {
1211 __u32 flag;
1212 char f[32];
1213 bool disable = false;
1214
1215 memset(f, 0, 32);
1216 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1217 if (len < 0)
1218 return len;
1219
1220 if (copy_from_user(f, &user_buffer[i], len))
1221 return -EFAULT;
1222 i += len;
1223
1224 flag = pktgen_read_flag(f, &disable);
1225
1226 if (flag) {
1227 if (disable)
1228 pkt_dev->flags &= ~flag;
1229 else
1230 pkt_dev->flags |= flag;
1231 } else {
1232 sprintf(pg_result,
1233 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1234 f,
1235 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1236 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, "
1237 "MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, "
1238 "QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, "
1239 "NO_TIMESTAMP, "
1240#ifdef CONFIG_XFRM
1241 "IPSEC, "
1242#endif
1243 "NODE_ALLOC\n");
1244 return count;
1245 }
1246 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1247 return count;
1248 }
1249 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1250 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1251 if (len < 0)
1252 return len;
1253
1254 if (copy_from_user(buf, &user_buffer[i], len))
1255 return -EFAULT;
1256 buf[len] = 0;
1257 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1258 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1259 strcpy(pkt_dev->dst_min, buf);
1260 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1261 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1262 }
1263 if (debug)
1264 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
1265 i += len;
1266 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1267 return count;
1268 }
1269 if (!strcmp(name, "dst_max")) {
1270 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1271 if (len < 0)
1272 return len;
1273
1274 if (copy_from_user(buf, &user_buffer[i], len))
1275 return -EFAULT;
1276 buf[len] = 0;
1277 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1278 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1279 strcpy(pkt_dev->dst_max, buf);
1280 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1281 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1282 }
1283 if (debug)
1284 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
1285 i += len;
1286 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1287 return count;
1288 }
1289 if (!strcmp(name, "dst6")) {
1290 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1291 if (len < 0)
1292 return len;
1293
1294 pkt_dev->flags |= F_IPV6;
1295
1296 if (copy_from_user(buf, &user_buffer[i], len))
1297 return -EFAULT;
1298 buf[len] = 0;
1299
1300 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
1301 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1302
1303 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1304
1305 if (debug)
1306 pr_debug("dst6 set to: %s\n", buf);
1307
1308 i += len;
1309 sprintf(pg_result, "OK: dst6=%s", buf);
1310 return count;
1311 }
1312 if (!strcmp(name, "dst6_min")) {
1313 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1314 if (len < 0)
1315 return len;
1316
1317 pkt_dev->flags |= F_IPV6;
1318
1319 if (copy_from_user(buf, &user_buffer[i], len))
1320 return -EFAULT;
1321 buf[len] = 0;
1322
1323 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
1324 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1325
1326 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
1327 if (debug)
1328 pr_debug("dst6_min set to: %s\n", buf);
1329
1330 i += len;
1331 sprintf(pg_result, "OK: dst6_min=%s", buf);
1332 return count;
1333 }
1334 if (!strcmp(name, "dst6_max")) {
1335 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1336 if (len < 0)
1337 return len;
1338
1339 pkt_dev->flags |= F_IPV6;
1340
1341 if (copy_from_user(buf, &user_buffer[i], len))
1342 return -EFAULT;
1343 buf[len] = 0;
1344
1345 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
1346 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1347
1348 if (debug)
1349 pr_debug("dst6_max set to: %s\n", buf);
1350
1351 i += len;
1352 sprintf(pg_result, "OK: dst6_max=%s", buf);
1353 return count;
1354 }
1355 if (!strcmp(name, "src6")) {
1356 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1357 if (len < 0)
1358 return len;
1359
1360 pkt_dev->flags |= F_IPV6;
1361
1362 if (copy_from_user(buf, &user_buffer[i], len))
1363 return -EFAULT;
1364 buf[len] = 0;
1365
1366 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
1367 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1368
1369 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1370
1371 if (debug)
1372 pr_debug("src6 set to: %s\n", buf);
1373
1374 i += len;
1375 sprintf(pg_result, "OK: src6=%s", buf);
1376 return count;
1377 }
1378 if (!strcmp(name, "src_min")) {
1379 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1380 if (len < 0)
1381 return len;
1382
1383 if (copy_from_user(buf, &user_buffer[i], len))
1384 return -EFAULT;
1385 buf[len] = 0;
1386 if (strcmp(buf, pkt_dev->src_min) != 0) {
1387 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1388 strcpy(pkt_dev->src_min, buf);
1389 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1390 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1391 }
1392 if (debug)
1393 pr_debug("src_min set to: %s\n", pkt_dev->src_min);
1394 i += len;
1395 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1396 return count;
1397 }
1398 if (!strcmp(name, "src_max")) {
1399 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1400 if (len < 0)
1401 return len;
1402
1403 if (copy_from_user(buf, &user_buffer[i], len))
1404 return -EFAULT;
1405 buf[len] = 0;
1406 if (strcmp(buf, pkt_dev->src_max) != 0) {
1407 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1408 strcpy(pkt_dev->src_max, buf);
1409 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1410 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1411 }
1412 if (debug)
1413 pr_debug("src_max set to: %s\n", pkt_dev->src_max);
1414 i += len;
1415 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1416 return count;
1417 }
1418 if (!strcmp(name, "dst_mac")) {
1419 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1420 if (len < 0)
1421 return len;
1422
1423 memset(valstr, 0, sizeof(valstr));
1424 if (copy_from_user(valstr, &user_buffer[i], len))
1425 return -EFAULT;
1426
1427 if (!mac_pton(valstr, pkt_dev->dst_mac))
1428 return -EINVAL;
1429 /* Set up Dest MAC */
1430 ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac);
1431
1432 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1433 return count;
1434 }
1435 if (!strcmp(name, "src_mac")) {
1436 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1437 if (len < 0)
1438 return len;
1439
1440 memset(valstr, 0, sizeof(valstr));
1441 if (copy_from_user(valstr, &user_buffer[i], len))
1442 return -EFAULT;
1443
1444 if (!mac_pton(valstr, pkt_dev->src_mac))
1445 return -EINVAL;
1446 /* Set up Src MAC */
1447 ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac);
1448
1449 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1450 return count;
1451 }
1452
1453 if (!strcmp(name, "clear_counters")) {
1454 pktgen_clear_counters(pkt_dev);
1455 sprintf(pg_result, "OK: Clearing counters.\n");
1456 return count;
1457 }
1458
1459 if (!strcmp(name, "flows")) {
1460 len = num_arg(&user_buffer[i], 10, &value);
1461 if (len < 0)
1462 return len;
1463
1464 i += len;
1465 if (value > MAX_CFLOWS)
1466 value = MAX_CFLOWS;
1467
1468 pkt_dev->cflows = value;
1469 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1470 return count;
1471 }
1472#ifdef CONFIG_XFRM
1473 if (!strcmp(name, "spi")) {
1474 len = num_arg(&user_buffer[i], 10, &value);
1475 if (len < 0)
1476 return len;
1477
1478 i += len;
1479 pkt_dev->spi = value;
1480 sprintf(pg_result, "OK: spi=%u", pkt_dev->spi);
1481 return count;
1482 }
1483#endif
1484 if (!strcmp(name, "flowlen")) {
1485 len = num_arg(&user_buffer[i], 10, &value);
1486 if (len < 0)
1487 return len;
1488
1489 i += len;
1490 pkt_dev->lflow = value;
1491 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1492 return count;
1493 }
1494
1495 if (!strcmp(name, "queue_map_min")) {
1496 len = num_arg(&user_buffer[i], 5, &value);
1497 if (len < 0)
1498 return len;
1499
1500 i += len;
1501 pkt_dev->queue_map_min = value;
1502 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1503 return count;
1504 }
1505
1506 if (!strcmp(name, "queue_map_max")) {
1507 len = num_arg(&user_buffer[i], 5, &value);
1508 if (len < 0)
1509 return len;
1510
1511 i += len;
1512 pkt_dev->queue_map_max = value;
1513 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1514 return count;
1515 }
1516
1517 if (!strcmp(name, "mpls")) {
1518 unsigned int n, cnt;
1519
1520 len = get_labels(&user_buffer[i], pkt_dev);
1521 if (len < 0)
1522 return len;
1523 i += len;
1524 cnt = sprintf(pg_result, "OK: mpls=");
1525 for (n = 0; n < pkt_dev->nr_labels; n++)
1526 cnt += sprintf(pg_result + cnt,
1527 "%08x%s", ntohl(pkt_dev->labels[n]),
1528 n == pkt_dev->nr_labels-1 ? "" : ",");
1529
1530 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1531 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1532 pkt_dev->svlan_id = 0xffff;
1533
1534 if (debug)
1535 pr_debug("VLAN/SVLAN auto turned off\n");
1536 }
1537 return count;
1538 }
1539
1540 if (!strcmp(name, "vlan_id")) {
1541 len = num_arg(&user_buffer[i], 4, &value);
1542 if (len < 0)
1543 return len;
1544
1545 i += len;
1546 if (value <= 4095) {
1547 pkt_dev->vlan_id = value; /* turn on VLAN */
1548
1549 if (debug)
1550 pr_debug("VLAN turned on\n");
1551
1552 if (debug && pkt_dev->nr_labels)
1553 pr_debug("MPLS auto turned off\n");
1554
1555 pkt_dev->nr_labels = 0; /* turn off MPLS */
1556 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1557 } else {
1558 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1559 pkt_dev->svlan_id = 0xffff;
1560
1561 if (debug)
1562 pr_debug("VLAN/SVLAN turned off\n");
1563 }
1564 return count;
1565 }
1566
1567 if (!strcmp(name, "vlan_p")) {
1568 len = num_arg(&user_buffer[i], 1, &value);
1569 if (len < 0)
1570 return len;
1571
1572 i += len;
1573 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1574 pkt_dev->vlan_p = value;
1575 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1576 } else {
1577 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1578 }
1579 return count;
1580 }
1581
1582 if (!strcmp(name, "vlan_cfi")) {
1583 len = num_arg(&user_buffer[i], 1, &value);
1584 if (len < 0)
1585 return len;
1586
1587 i += len;
1588 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1589 pkt_dev->vlan_cfi = value;
1590 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1591 } else {
1592 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1593 }
1594 return count;
1595 }
1596
1597 if (!strcmp(name, "svlan_id")) {
1598 len = num_arg(&user_buffer[i], 4, &value);
1599 if (len < 0)
1600 return len;
1601
1602 i += len;
1603 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1604 pkt_dev->svlan_id = value; /* turn on SVLAN */
1605
1606 if (debug)
1607 pr_debug("SVLAN turned on\n");
1608
1609 if (debug && pkt_dev->nr_labels)
1610 pr_debug("MPLS auto turned off\n");
1611
1612 pkt_dev->nr_labels = 0; /* turn off MPLS */
1613 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1614 } else {
1615 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1616 pkt_dev->svlan_id = 0xffff;
1617
1618 if (debug)
1619 pr_debug("VLAN/SVLAN turned off\n");
1620 }
1621 return count;
1622 }
1623
1624 if (!strcmp(name, "svlan_p")) {
1625 len = num_arg(&user_buffer[i], 1, &value);
1626 if (len < 0)
1627 return len;
1628
1629 i += len;
1630 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1631 pkt_dev->svlan_p = value;
1632 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1633 } else {
1634 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1635 }
1636 return count;
1637 }
1638
1639 if (!strcmp(name, "svlan_cfi")) {
1640 len = num_arg(&user_buffer[i], 1, &value);
1641 if (len < 0)
1642 return len;
1643
1644 i += len;
1645 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1646 pkt_dev->svlan_cfi = value;
1647 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1648 } else {
1649 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1650 }
1651 return count;
1652 }
1653
1654 if (!strcmp(name, "tos")) {
1655 __u32 tmp_value = 0;
1656 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1657 if (len < 0)
1658 return len;
1659
1660 i += len;
1661 if (len == 2) {
1662 pkt_dev->tos = tmp_value;
1663 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1664 } else {
1665 sprintf(pg_result, "ERROR: tos must be 00-ff");
1666 }
1667 return count;
1668 }
1669
1670 if (!strcmp(name, "traffic_class")) {
1671 __u32 tmp_value = 0;
1672 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1673 if (len < 0)
1674 return len;
1675
1676 i += len;
1677 if (len == 2) {
1678 pkt_dev->traffic_class = tmp_value;
1679 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1680 } else {
1681 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1682 }
1683 return count;
1684 }
1685
1686 if (!strcmp(name, "skb_priority")) {
1687 len = num_arg(&user_buffer[i], 9, &value);
1688 if (len < 0)
1689 return len;
1690
1691 i += len;
1692 pkt_dev->skb_priority = value;
1693 sprintf(pg_result, "OK: skb_priority=%i",
1694 pkt_dev->skb_priority);
1695 return count;
1696 }
1697
1698 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1699 return -EINVAL;
1700}
1701
1702static int pktgen_if_open(struct inode *inode, struct file *file)
1703{
1704 return single_open(file, pktgen_if_show, PDE_DATA(inode));
1705}
1706
1707static const struct proc_ops pktgen_if_proc_ops = {
1708 .proc_open = pktgen_if_open,
1709 .proc_read = seq_read,
1710 .proc_lseek = seq_lseek,
1711 .proc_write = pktgen_if_write,
1712 .proc_release = single_release,
1713};
1714
1715static int pktgen_thread_show(struct seq_file *seq, void *v)
1716{
1717 struct pktgen_thread *t = seq->private;
1718 const struct pktgen_dev *pkt_dev;
1719
1720 BUG_ON(!t);
1721
1722 seq_puts(seq, "Running: ");
1723
1724 rcu_read_lock();
1725 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1726 if (pkt_dev->running)
1727 seq_printf(seq, "%s ", pkt_dev->odevname);
1728
1729 seq_puts(seq, "\nStopped: ");
1730
1731 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1732 if (!pkt_dev->running)
1733 seq_printf(seq, "%s ", pkt_dev->odevname);
1734
1735 if (t->result[0])
1736 seq_printf(seq, "\nResult: %s\n", t->result);
1737 else
1738 seq_puts(seq, "\nResult: NA\n");
1739
1740 rcu_read_unlock();
1741
1742 return 0;
1743}
1744
1745static ssize_t pktgen_thread_write(struct file *file,
1746 const char __user * user_buffer,
1747 size_t count, loff_t * offset)
1748{
1749 struct seq_file *seq = file->private_data;
1750 struct pktgen_thread *t = seq->private;
1751 int i, max, len, ret;
1752 char name[40];
1753 char *pg_result;
1754
1755 if (count < 1) {
1756 // sprintf(pg_result, "Wrong command format");
1757 return -EINVAL;
1758 }
1759
1760 max = count;
1761 len = count_trail_chars(user_buffer, max);
1762 if (len < 0)
1763 return len;
1764
1765 i = len;
1766
1767 /* Read variable name */
1768
1769 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1770 if (len < 0)
1771 return len;
1772
1773 memset(name, 0, sizeof(name));
1774 if (copy_from_user(name, &user_buffer[i], len))
1775 return -EFAULT;
1776 i += len;
1777
1778 max = count - i;
1779 len = count_trail_chars(&user_buffer[i], max);
1780 if (len < 0)
1781 return len;
1782
1783 i += len;
1784
1785 if (debug)
1786 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
1787
1788 if (!t) {
1789 pr_err("ERROR: No thread\n");
1790 ret = -EINVAL;
1791 goto out;
1792 }
1793
1794 pg_result = &(t->result[0]);
1795
1796 if (!strcmp(name, "add_device")) {
1797 char f[32];
1798 memset(f, 0, 32);
1799 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1800 if (len < 0) {
1801 ret = len;
1802 goto out;
1803 }
1804 if (copy_from_user(f, &user_buffer[i], len))
1805 return -EFAULT;
1806 i += len;
1807 mutex_lock(&pktgen_thread_lock);
1808 ret = pktgen_add_device(t, f);
1809 mutex_unlock(&pktgen_thread_lock);
1810 if (!ret) {
1811 ret = count;
1812 sprintf(pg_result, "OK: add_device=%s", f);
1813 } else
1814 sprintf(pg_result, "ERROR: can not add device %s", f);
1815 goto out;
1816 }
1817
1818 if (!strcmp(name, "rem_device_all")) {
1819 mutex_lock(&pktgen_thread_lock);
1820 t->control |= T_REMDEVALL;
1821 mutex_unlock(&pktgen_thread_lock);
1822 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1823 ret = count;
1824 sprintf(pg_result, "OK: rem_device_all");
1825 goto out;
1826 }
1827
1828 if (!strcmp(name, "max_before_softirq")) {
1829 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1830 ret = count;
1831 goto out;
1832 }
1833
1834 ret = -EINVAL;
1835out:
1836 return ret;
1837}
1838
1839static int pktgen_thread_open(struct inode *inode, struct file *file)
1840{
1841 return single_open(file, pktgen_thread_show, PDE_DATA(inode));
1842}
1843
1844static const struct proc_ops pktgen_thread_proc_ops = {
1845 .proc_open = pktgen_thread_open,
1846 .proc_read = seq_read,
1847 .proc_lseek = seq_lseek,
1848 .proc_write = pktgen_thread_write,
1849 .proc_release = single_release,
1850};
1851
1852/* Think find or remove for NN */
1853static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn,
1854 const char *ifname, int remove)
1855{
1856 struct pktgen_thread *t;
1857 struct pktgen_dev *pkt_dev = NULL;
1858 bool exact = (remove == FIND);
1859
1860 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1861 pkt_dev = pktgen_find_dev(t, ifname, exact);
1862 if (pkt_dev) {
1863 if (remove) {
1864 pkt_dev->removal_mark = 1;
1865 t->control |= T_REMDEV;
1866 }
1867 break;
1868 }
1869 }
1870 return pkt_dev;
1871}
1872
1873/*
1874 * mark a device for removal
1875 */
1876static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname)
1877{
1878 struct pktgen_dev *pkt_dev = NULL;
1879 const int max_tries = 10, msec_per_try = 125;
1880 int i = 0;
1881
1882 mutex_lock(&pktgen_thread_lock);
1883 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1884
1885 while (1) {
1886
1887 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE);
1888 if (pkt_dev == NULL)
1889 break; /* success */
1890
1891 mutex_unlock(&pktgen_thread_lock);
1892 pr_debug("%s: waiting for %s to disappear....\n",
1893 __func__, ifname);
1894 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1895 mutex_lock(&pktgen_thread_lock);
1896
1897 if (++i >= max_tries) {
1898 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1899 __func__, msec_per_try * i, ifname);
1900 break;
1901 }
1902
1903 }
1904
1905 mutex_unlock(&pktgen_thread_lock);
1906}
1907
1908static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev)
1909{
1910 struct pktgen_thread *t;
1911
1912 mutex_lock(&pktgen_thread_lock);
1913
1914 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1915 struct pktgen_dev *pkt_dev;
1916
1917 if_lock(t);
1918 list_for_each_entry(pkt_dev, &t->if_list, list) {
1919 if (pkt_dev->odev != dev)
1920 continue;
1921
1922 proc_remove(pkt_dev->entry);
1923
1924 pkt_dev->entry = proc_create_data(dev->name, 0600,
1925 pn->proc_dir,
1926 &pktgen_if_proc_ops,
1927 pkt_dev);
1928 if (!pkt_dev->entry)
1929 pr_err("can't move proc entry for '%s'\n",
1930 dev->name);
1931 break;
1932 }
1933 if_unlock(t);
1934 }
1935 mutex_unlock(&pktgen_thread_lock);
1936}
1937
1938static int pktgen_device_event(struct notifier_block *unused,
1939 unsigned long event, void *ptr)
1940{
1941 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1942 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id);
1943
1944 if (pn->pktgen_exiting)
1945 return NOTIFY_DONE;
1946
1947 /* It is OK that we do not hold the group lock right now,
1948 * as we run under the RTNL lock.
1949 */
1950
1951 switch (event) {
1952 case NETDEV_CHANGENAME:
1953 pktgen_change_name(pn, dev);
1954 break;
1955
1956 case NETDEV_UNREGISTER:
1957 pktgen_mark_device(pn, dev->name);
1958 break;
1959 }
1960
1961 return NOTIFY_DONE;
1962}
1963
1964static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn,
1965 struct pktgen_dev *pkt_dev,
1966 const char *ifname)
1967{
1968 char b[IFNAMSIZ+5];
1969 int i;
1970
1971 for (i = 0; ifname[i] != '@'; i++) {
1972 if (i == IFNAMSIZ)
1973 break;
1974
1975 b[i] = ifname[i];
1976 }
1977 b[i] = 0;
1978
1979 return dev_get_by_name(pn->net, b);
1980}
1981
1982
1983/* Associate pktgen_dev with a device. */
1984
1985static int pktgen_setup_dev(const struct pktgen_net *pn,
1986 struct pktgen_dev *pkt_dev, const char *ifname)
1987{
1988 struct net_device *odev;
1989 int err;
1990
1991 /* Clean old setups */
1992 if (pkt_dev->odev) {
1993 dev_put(pkt_dev->odev);
1994 pkt_dev->odev = NULL;
1995 }
1996
1997 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname);
1998 if (!odev) {
1999 pr_err("no such netdevice: \"%s\"\n", ifname);
2000 return -ENODEV;
2001 }
2002
2003 if (odev->type != ARPHRD_ETHER && odev->type != ARPHRD_LOOPBACK) {
2004 pr_err("not an ethernet or loopback device: \"%s\"\n", ifname);
2005 err = -EINVAL;
2006 } else if (!netif_running(odev)) {
2007 pr_err("device is down: \"%s\"\n", ifname);
2008 err = -ENETDOWN;
2009 } else {
2010 pkt_dev->odev = odev;
2011 return 0;
2012 }
2013
2014 dev_put(odev);
2015 return err;
2016}
2017
2018/* Read pkt_dev from the interface and set up internal pktgen_dev
2019 * structure to have the right information to create/send packets
2020 */
2021static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2022{
2023 int ntxq;
2024
2025 if (!pkt_dev->odev) {
2026 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2027 sprintf(pkt_dev->result,
2028 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2029 return;
2030 }
2031
2032 /* make sure that we don't pick a non-existing transmit queue */
2033 ntxq = pkt_dev->odev->real_num_tx_queues;
2034
2035 if (ntxq <= pkt_dev->queue_map_min) {
2036 pr_warn("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2037 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2038 pkt_dev->odevname);
2039 pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2040 }
2041 if (pkt_dev->queue_map_max >= ntxq) {
2042 pr_warn("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2043 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2044 pkt_dev->odevname);
2045 pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2046 }
2047
2048 /* Default to the interface's mac if not explicitly set. */
2049
2050 if (is_zero_ether_addr(pkt_dev->src_mac))
2051 ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr);
2052
2053 /* Set up Dest MAC */
2054 ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac);
2055
2056 if (pkt_dev->flags & F_IPV6) {
2057 int i, set = 0, err = 1;
2058 struct inet6_dev *idev;
2059
2060 if (pkt_dev->min_pkt_size == 0) {
2061 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
2062 + sizeof(struct udphdr)
2063 + sizeof(struct pktgen_hdr)
2064 + pkt_dev->pkt_overhead;
2065 }
2066
2067 for (i = 0; i < sizeof(struct in6_addr); i++)
2068 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2069 set = 1;
2070 break;
2071 }
2072
2073 if (!set) {
2074
2075 /*
2076 * Use linklevel address if unconfigured.
2077 *
2078 * use ipv6_get_lladdr if/when it's get exported
2079 */
2080
2081 rcu_read_lock();
2082 idev = __in6_dev_get(pkt_dev->odev);
2083 if (idev) {
2084 struct inet6_ifaddr *ifp;
2085
2086 read_lock_bh(&idev->lock);
2087 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2088 if ((ifp->scope & IFA_LINK) &&
2089 !(ifp->flags & IFA_F_TENTATIVE)) {
2090 pkt_dev->cur_in6_saddr = ifp->addr;
2091 err = 0;
2092 break;
2093 }
2094 }
2095 read_unlock_bh(&idev->lock);
2096 }
2097 rcu_read_unlock();
2098 if (err)
2099 pr_err("ERROR: IPv6 link address not available\n");
2100 }
2101 } else {
2102 if (pkt_dev->min_pkt_size == 0) {
2103 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
2104 + sizeof(struct udphdr)
2105 + sizeof(struct pktgen_hdr)
2106 + pkt_dev->pkt_overhead;
2107 }
2108
2109 pkt_dev->saddr_min = 0;
2110 pkt_dev->saddr_max = 0;
2111 if (strlen(pkt_dev->src_min) == 0) {
2112
2113 struct in_device *in_dev;
2114
2115 rcu_read_lock();
2116 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2117 if (in_dev) {
2118 const struct in_ifaddr *ifa;
2119
2120 ifa = rcu_dereference(in_dev->ifa_list);
2121 if (ifa) {
2122 pkt_dev->saddr_min = ifa->ifa_address;
2123 pkt_dev->saddr_max = pkt_dev->saddr_min;
2124 }
2125 }
2126 rcu_read_unlock();
2127 } else {
2128 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2129 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2130 }
2131
2132 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2133 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2134 }
2135 /* Initialize current values. */
2136 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2137 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
2138 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
2139
2140 pkt_dev->cur_dst_mac_offset = 0;
2141 pkt_dev->cur_src_mac_offset = 0;
2142 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2143 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2144 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2145 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2146 pkt_dev->nflows = 0;
2147}
2148
2149
2150static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2151{
2152 ktime_t start_time, end_time;
2153 s64 remaining;
2154 struct hrtimer_sleeper t;
2155
2156 hrtimer_init_sleeper_on_stack(&t, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2157 hrtimer_set_expires(&t.timer, spin_until);
2158
2159 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2160 if (remaining <= 0)
2161 goto out;
2162
2163 start_time = ktime_get();
2164 if (remaining < 100000) {
2165 /* for small delays (<100us), just loop until limit is reached */
2166 do {
2167 end_time = ktime_get();
2168 } while (ktime_compare(end_time, spin_until) < 0);
2169 } else {
2170 do {
2171 set_current_state(TASK_INTERRUPTIBLE);
2172 hrtimer_sleeper_start_expires(&t, HRTIMER_MODE_ABS);
2173
2174 if (likely(t.task))
2175 schedule();
2176
2177 hrtimer_cancel(&t.timer);
2178 } while (t.task && pkt_dev->running && !signal_pending(current));
2179 __set_current_state(TASK_RUNNING);
2180 end_time = ktime_get();
2181 }
2182
2183 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2184out:
2185 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2186 destroy_hrtimer_on_stack(&t.timer);
2187}
2188
2189static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2190{
2191 pkt_dev->pkt_overhead = 0;
2192 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2193 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2194 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2195}
2196
2197static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2198{
2199 return !!(pkt_dev->flows[flow].flags & F_INIT);
2200}
2201
2202static inline int f_pick(struct pktgen_dev *pkt_dev)
2203{
2204 int flow = pkt_dev->curfl;
2205
2206 if (pkt_dev->flags & F_FLOW_SEQ) {
2207 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2208 /* reset time */
2209 pkt_dev->flows[flow].count = 0;
2210 pkt_dev->flows[flow].flags = 0;
2211 pkt_dev->curfl += 1;
2212 if (pkt_dev->curfl >= pkt_dev->cflows)
2213 pkt_dev->curfl = 0; /*reset */
2214 }
2215 } else {
2216 flow = prandom_u32() % pkt_dev->cflows;
2217 pkt_dev->curfl = flow;
2218
2219 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2220 pkt_dev->flows[flow].count = 0;
2221 pkt_dev->flows[flow].flags = 0;
2222 }
2223 }
2224
2225 return pkt_dev->curfl;
2226}
2227
2228
2229#ifdef CONFIG_XFRM
2230/* If there was already an IPSEC SA, we keep it as is, else
2231 * we go look for it ...
2232*/
2233#define DUMMY_MARK 0
2234static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2235{
2236 struct xfrm_state *x = pkt_dev->flows[flow].x;
2237 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
2238 if (!x) {
2239
2240 if (pkt_dev->spi) {
2241 /* We need as quick as possible to find the right SA
2242 * Searching with minimum criteria to archieve this.
2243 */
2244 x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET);
2245 } else {
2246 /* slow path: we dont already have xfrm_state */
2247 x = xfrm_stateonly_find(pn->net, DUMMY_MARK, 0,
2248 (xfrm_address_t *)&pkt_dev->cur_daddr,
2249 (xfrm_address_t *)&pkt_dev->cur_saddr,
2250 AF_INET,
2251 pkt_dev->ipsmode,
2252 pkt_dev->ipsproto, 0);
2253 }
2254 if (x) {
2255 pkt_dev->flows[flow].x = x;
2256 set_pkt_overhead(pkt_dev);
2257 pkt_dev->pkt_overhead += x->props.header_len;
2258 }
2259
2260 }
2261}
2262#endif
2263static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2264{
2265
2266 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2267 pkt_dev->cur_queue_map = smp_processor_id();
2268
2269 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2270 __u16 t;
2271 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2272 t = prandom_u32() %
2273 (pkt_dev->queue_map_max -
2274 pkt_dev->queue_map_min + 1)
2275 + pkt_dev->queue_map_min;
2276 } else {
2277 t = pkt_dev->cur_queue_map + 1;
2278 if (t > pkt_dev->queue_map_max)
2279 t = pkt_dev->queue_map_min;
2280 }
2281 pkt_dev->cur_queue_map = t;
2282 }
2283 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2284}
2285
2286/* Increment/randomize headers according to flags and current values
2287 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2288 */
2289static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2290{
2291 __u32 imn;
2292 __u32 imx;
2293 int flow = 0;
2294
2295 if (pkt_dev->cflows)
2296 flow = f_pick(pkt_dev);
2297
2298 /* Deal with source MAC */
2299 if (pkt_dev->src_mac_count > 1) {
2300 __u32 mc;
2301 __u32 tmp;
2302
2303 if (pkt_dev->flags & F_MACSRC_RND)
2304 mc = prandom_u32() % pkt_dev->src_mac_count;
2305 else {
2306 mc = pkt_dev->cur_src_mac_offset++;
2307 if (pkt_dev->cur_src_mac_offset >=
2308 pkt_dev->src_mac_count)
2309 pkt_dev->cur_src_mac_offset = 0;
2310 }
2311
2312 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2313 pkt_dev->hh[11] = tmp;
2314 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2315 pkt_dev->hh[10] = tmp;
2316 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2317 pkt_dev->hh[9] = tmp;
2318 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2319 pkt_dev->hh[8] = tmp;
2320 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2321 pkt_dev->hh[7] = tmp;
2322 }
2323
2324 /* Deal with Destination MAC */
2325 if (pkt_dev->dst_mac_count > 1) {
2326 __u32 mc;
2327 __u32 tmp;
2328
2329 if (pkt_dev->flags & F_MACDST_RND)
2330 mc = prandom_u32() % pkt_dev->dst_mac_count;
2331
2332 else {
2333 mc = pkt_dev->cur_dst_mac_offset++;
2334 if (pkt_dev->cur_dst_mac_offset >=
2335 pkt_dev->dst_mac_count) {
2336 pkt_dev->cur_dst_mac_offset = 0;
2337 }
2338 }
2339
2340 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2341 pkt_dev->hh[5] = tmp;
2342 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2343 pkt_dev->hh[4] = tmp;
2344 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2345 pkt_dev->hh[3] = tmp;
2346 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2347 pkt_dev->hh[2] = tmp;
2348 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2349 pkt_dev->hh[1] = tmp;
2350 }
2351
2352 if (pkt_dev->flags & F_MPLS_RND) {
2353 unsigned int i;
2354 for (i = 0; i < pkt_dev->nr_labels; i++)
2355 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2356 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2357 ((__force __be32)prandom_u32() &
2358 htonl(0x000fffff));
2359 }
2360
2361 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2362 pkt_dev->vlan_id = prandom_u32() & (4096 - 1);
2363 }
2364
2365 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2366 pkt_dev->svlan_id = prandom_u32() & (4096 - 1);
2367 }
2368
2369 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2370 if (pkt_dev->flags & F_UDPSRC_RND)
2371 pkt_dev->cur_udp_src = prandom_u32() %
2372 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2373 + pkt_dev->udp_src_min;
2374
2375 else {
2376 pkt_dev->cur_udp_src++;
2377 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2378 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2379 }
2380 }
2381
2382 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2383 if (pkt_dev->flags & F_UDPDST_RND) {
2384 pkt_dev->cur_udp_dst = prandom_u32() %
2385 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2386 + pkt_dev->udp_dst_min;
2387 } else {
2388 pkt_dev->cur_udp_dst++;
2389 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2390 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2391 }
2392 }
2393
2394 if (!(pkt_dev->flags & F_IPV6)) {
2395
2396 imn = ntohl(pkt_dev->saddr_min);
2397 imx = ntohl(pkt_dev->saddr_max);
2398 if (imn < imx) {
2399 __u32 t;
2400 if (pkt_dev->flags & F_IPSRC_RND)
2401 t = prandom_u32() % (imx - imn) + imn;
2402 else {
2403 t = ntohl(pkt_dev->cur_saddr);
2404 t++;
2405 if (t > imx)
2406 t = imn;
2407
2408 }
2409 pkt_dev->cur_saddr = htonl(t);
2410 }
2411
2412 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2413 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2414 } else {
2415 imn = ntohl(pkt_dev->daddr_min);
2416 imx = ntohl(pkt_dev->daddr_max);
2417 if (imn < imx) {
2418 __u32 t;
2419 __be32 s;
2420 if (pkt_dev->flags & F_IPDST_RND) {
2421
2422 do {
2423 t = prandom_u32() %
2424 (imx - imn) + imn;
2425 s = htonl(t);
2426 } while (ipv4_is_loopback(s) ||
2427 ipv4_is_multicast(s) ||
2428 ipv4_is_lbcast(s) ||
2429 ipv4_is_zeronet(s) ||
2430 ipv4_is_local_multicast(s));
2431 pkt_dev->cur_daddr = s;
2432 } else {
2433 t = ntohl(pkt_dev->cur_daddr);
2434 t++;
2435 if (t > imx) {
2436 t = imn;
2437 }
2438 pkt_dev->cur_daddr = htonl(t);
2439 }
2440 }
2441 if (pkt_dev->cflows) {
2442 pkt_dev->flows[flow].flags |= F_INIT;
2443 pkt_dev->flows[flow].cur_daddr =
2444 pkt_dev->cur_daddr;
2445#ifdef CONFIG_XFRM
2446 if (pkt_dev->flags & F_IPSEC)
2447 get_ipsec_sa(pkt_dev, flow);
2448#endif
2449 pkt_dev->nflows++;
2450 }
2451 }
2452 } else { /* IPV6 * */
2453
2454 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
2455 int i;
2456
2457 /* Only random destinations yet */
2458
2459 for (i = 0; i < 4; i++) {
2460 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2461 (((__force __be32)prandom_u32() |
2462 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2463 pkt_dev->max_in6_daddr.s6_addr32[i]);
2464 }
2465 }
2466 }
2467
2468 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2469 __u32 t;
2470 if (pkt_dev->flags & F_TXSIZE_RND) {
2471 t = prandom_u32() %
2472 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2473 + pkt_dev->min_pkt_size;
2474 } else {
2475 t = pkt_dev->cur_pkt_size + 1;
2476 if (t > pkt_dev->max_pkt_size)
2477 t = pkt_dev->min_pkt_size;
2478 }
2479 pkt_dev->cur_pkt_size = t;
2480 }
2481
2482 set_cur_queue_map(pkt_dev);
2483
2484 pkt_dev->flows[flow].count++;
2485}
2486
2487
2488#ifdef CONFIG_XFRM
2489static u32 pktgen_dst_metrics[RTAX_MAX + 1] = {
2490
2491 [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */
2492};
2493
2494static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2495{
2496 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2497 int err = 0;
2498 struct net *net = dev_net(pkt_dev->odev);
2499
2500 if (!x)
2501 return 0;
2502 /* XXX: we dont support tunnel mode for now until
2503 * we resolve the dst issue */
2504 if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0))
2505 return 0;
2506
2507 /* But when user specify an valid SPI, transformation
2508 * supports both transport/tunnel mode + ESP/AH type.
2509 */
2510 if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0))
2511 skb->_skb_refdst = (unsigned long)&pkt_dev->xdst.u.dst | SKB_DST_NOREF;
2512
2513 rcu_read_lock_bh();
2514 err = pktgen_xfrm_outer_mode_output(x, skb);
2515 rcu_read_unlock_bh();
2516 if (err) {
2517 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR);
2518 goto error;
2519 }
2520 err = x->type->output(x, skb);
2521 if (err) {
2522 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR);
2523 goto error;
2524 }
2525 spin_lock_bh(&x->lock);
2526 x->curlft.bytes += skb->len;
2527 x->curlft.packets++;
2528 spin_unlock_bh(&x->lock);
2529error:
2530 return err;
2531}
2532
2533static void free_SAs(struct pktgen_dev *pkt_dev)
2534{
2535 if (pkt_dev->cflows) {
2536 /* let go of the SAs if we have them */
2537 int i;
2538 for (i = 0; i < pkt_dev->cflows; i++) {
2539 struct xfrm_state *x = pkt_dev->flows[i].x;
2540 if (x) {
2541 xfrm_state_put(x);
2542 pkt_dev->flows[i].x = NULL;
2543 }
2544 }
2545 }
2546}
2547
2548static int process_ipsec(struct pktgen_dev *pkt_dev,
2549 struct sk_buff *skb, __be16 protocol)
2550{
2551 if (pkt_dev->flags & F_IPSEC) {
2552 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2553 int nhead = 0;
2554 if (x) {
2555 struct ethhdr *eth;
2556 struct iphdr *iph;
2557 int ret;
2558
2559 nhead = x->props.header_len - skb_headroom(skb);
2560 if (nhead > 0) {
2561 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2562 if (ret < 0) {
2563 pr_err("Error expanding ipsec packet %d\n",
2564 ret);
2565 goto err;
2566 }
2567 }
2568
2569 /* ipsec is not expecting ll header */
2570 skb_pull(skb, ETH_HLEN);
2571 ret = pktgen_output_ipsec(skb, pkt_dev);
2572 if (ret) {
2573 pr_err("Error creating ipsec packet %d\n", ret);
2574 goto err;
2575 }
2576 /* restore ll */
2577 eth = skb_push(skb, ETH_HLEN);
2578 memcpy(eth, pkt_dev->hh, 2 * ETH_ALEN);
2579 eth->h_proto = protocol;
2580
2581 /* Update IPv4 header len as well as checksum value */
2582 iph = ip_hdr(skb);
2583 iph->tot_len = htons(skb->len - ETH_HLEN);
2584 ip_send_check(iph);
2585 }
2586 }
2587 return 1;
2588err:
2589 kfree_skb(skb);
2590 return 0;
2591}
2592#endif
2593
2594static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2595{
2596 unsigned int i;
2597 for (i = 0; i < pkt_dev->nr_labels; i++)
2598 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2599
2600 mpls--;
2601 *mpls |= MPLS_STACK_BOTTOM;
2602}
2603
2604static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2605 unsigned int prio)
2606{
2607 return htons(id | (cfi << 12) | (prio << 13));
2608}
2609
2610static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2611 int datalen)
2612{
2613 struct timespec64 timestamp;
2614 struct pktgen_hdr *pgh;
2615
2616 pgh = skb_put(skb, sizeof(*pgh));
2617 datalen -= sizeof(*pgh);
2618
2619 if (pkt_dev->nfrags <= 0) {
2620 skb_put_zero(skb, datalen);
2621 } else {
2622 int frags = pkt_dev->nfrags;
2623 int i, len;
2624 int frag_len;
2625
2626
2627 if (frags > MAX_SKB_FRAGS)
2628 frags = MAX_SKB_FRAGS;
2629 len = datalen - frags * PAGE_SIZE;
2630 if (len > 0) {
2631 skb_put_zero(skb, len);
2632 datalen = frags * PAGE_SIZE;
2633 }
2634
2635 i = 0;
2636 frag_len = (datalen/frags) < PAGE_SIZE ?
2637 (datalen/frags) : PAGE_SIZE;
2638 while (datalen > 0) {
2639 if (unlikely(!pkt_dev->page)) {
2640 int node = numa_node_id();
2641
2642 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2643 node = pkt_dev->node;
2644 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2645 if (!pkt_dev->page)
2646 break;
2647 }
2648 get_page(pkt_dev->page);
2649 skb_frag_set_page(skb, i, pkt_dev->page);
2650 skb_frag_off_set(&skb_shinfo(skb)->frags[i], 0);
2651 /*last fragment, fill rest of data*/
2652 if (i == (frags - 1))
2653 skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2654 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2655 else
2656 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2657 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2658 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2659 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2660 i++;
2661 skb_shinfo(skb)->nr_frags = i;
2662 }
2663 }
2664
2665 /* Stamp the time, and sequence number,
2666 * convert them to network byte order
2667 */
2668 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2669 pgh->seq_num = htonl(pkt_dev->seq_num);
2670
2671 if (pkt_dev->flags & F_NO_TIMESTAMP) {
2672 pgh->tv_sec = 0;
2673 pgh->tv_usec = 0;
2674 } else {
2675 /*
2676 * pgh->tv_sec wraps in y2106 when interpreted as unsigned
2677 * as done by wireshark, or y2038 when interpreted as signed.
2678 * This is probably harmless, but if anyone wants to improve
2679 * it, we could introduce a variant that puts 64-bit nanoseconds
2680 * into the respective header bytes.
2681 * This would also be slightly faster to read.
2682 */
2683 ktime_get_real_ts64(×tamp);
2684 pgh->tv_sec = htonl(timestamp.tv_sec);
2685 pgh->tv_usec = htonl(timestamp.tv_nsec / NSEC_PER_USEC);
2686 }
2687}
2688
2689static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
2690 struct pktgen_dev *pkt_dev)
2691{
2692 unsigned int extralen = LL_RESERVED_SPACE(dev);
2693 struct sk_buff *skb = NULL;
2694 unsigned int size;
2695
2696 size = pkt_dev->cur_pkt_size + 64 + extralen + pkt_dev->pkt_overhead;
2697 if (pkt_dev->flags & F_NODE) {
2698 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id();
2699
2700 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node);
2701 if (likely(skb)) {
2702 skb_reserve(skb, NET_SKB_PAD);
2703 skb->dev = dev;
2704 }
2705 } else {
2706 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
2707 }
2708
2709 /* the caller pre-fetches from skb->data and reserves for the mac hdr */
2710 if (likely(skb))
2711 skb_reserve(skb, extralen - 16);
2712
2713 return skb;
2714}
2715
2716static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2717 struct pktgen_dev *pkt_dev)
2718{
2719 struct sk_buff *skb = NULL;
2720 __u8 *eth;
2721 struct udphdr *udph;
2722 int datalen, iplen;
2723 struct iphdr *iph;
2724 __be16 protocol = htons(ETH_P_IP);
2725 __be32 *mpls;
2726 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2727 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2728 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2729 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2730 u16 queue_map;
2731
2732 if (pkt_dev->nr_labels)
2733 protocol = htons(ETH_P_MPLS_UC);
2734
2735 if (pkt_dev->vlan_id != 0xffff)
2736 protocol = htons(ETH_P_8021Q);
2737
2738 /* Update any of the values, used when we're incrementing various
2739 * fields.
2740 */
2741 mod_cur_headers(pkt_dev);
2742 queue_map = pkt_dev->cur_queue_map;
2743
2744 skb = pktgen_alloc_skb(odev, pkt_dev);
2745 if (!skb) {
2746 sprintf(pkt_dev->result, "No memory");
2747 return NULL;
2748 }
2749
2750 prefetchw(skb->data);
2751 skb_reserve(skb, 16);
2752
2753 /* Reserve for ethernet and IP header */
2754 eth = skb_push(skb, 14);
2755 mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32));
2756 if (pkt_dev->nr_labels)
2757 mpls_push(mpls, pkt_dev);
2758
2759 if (pkt_dev->vlan_id != 0xffff) {
2760 if (pkt_dev->svlan_id != 0xffff) {
2761 svlan_tci = skb_put(skb, sizeof(__be16));
2762 *svlan_tci = build_tci(pkt_dev->svlan_id,
2763 pkt_dev->svlan_cfi,
2764 pkt_dev->svlan_p);
2765 svlan_encapsulated_proto = skb_put(skb,
2766 sizeof(__be16));
2767 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2768 }
2769 vlan_tci = skb_put(skb, sizeof(__be16));
2770 *vlan_tci = build_tci(pkt_dev->vlan_id,
2771 pkt_dev->vlan_cfi,
2772 pkt_dev->vlan_p);
2773 vlan_encapsulated_proto = skb_put(skb, sizeof(__be16));
2774 *vlan_encapsulated_proto = htons(ETH_P_IP);
2775 }
2776
2777 skb_reset_mac_header(skb);
2778 skb_set_network_header(skb, skb->len);
2779 iph = skb_put(skb, sizeof(struct iphdr));
2780
2781 skb_set_transport_header(skb, skb->len);
2782 udph = skb_put(skb, sizeof(struct udphdr));
2783 skb_set_queue_mapping(skb, queue_map);
2784 skb->priority = pkt_dev->skb_priority;
2785
2786 memcpy(eth, pkt_dev->hh, 12);
2787 *(__be16 *) & eth[12] = protocol;
2788
2789 /* Eth + IPh + UDPh + mpls */
2790 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2791 pkt_dev->pkt_overhead;
2792 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
2793 datalen = sizeof(struct pktgen_hdr);
2794
2795 udph->source = htons(pkt_dev->cur_udp_src);
2796 udph->dest = htons(pkt_dev->cur_udp_dst);
2797 udph->len = htons(datalen + 8); /* DATA + udphdr */
2798 udph->check = 0;
2799
2800 iph->ihl = 5;
2801 iph->version = 4;
2802 iph->ttl = 32;
2803 iph->tos = pkt_dev->tos;
2804 iph->protocol = IPPROTO_UDP; /* UDP */
2805 iph->saddr = pkt_dev->cur_saddr;
2806 iph->daddr = pkt_dev->cur_daddr;
2807 iph->id = htons(pkt_dev->ip_id);
2808 pkt_dev->ip_id++;
2809 iph->frag_off = 0;
2810 iplen = 20 + 8 + datalen;
2811 iph->tot_len = htons(iplen);
2812 ip_send_check(iph);
2813 skb->protocol = protocol;
2814 skb->dev = odev;
2815 skb->pkt_type = PACKET_HOST;
2816
2817 pktgen_finalize_skb(pkt_dev, skb, datalen);
2818
2819 if (!(pkt_dev->flags & F_UDPCSUM)) {
2820 skb->ip_summed = CHECKSUM_NONE;
2821 } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IP_CSUM)) {
2822 skb->ip_summed = CHECKSUM_PARTIAL;
2823 skb->csum = 0;
2824 udp4_hwcsum(skb, iph->saddr, iph->daddr);
2825 } else {
2826 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), datalen + 8, 0);
2827
2828 /* add protocol-dependent pseudo-header */
2829 udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
2830 datalen + 8, IPPROTO_UDP, csum);
2831
2832 if (udph->check == 0)
2833 udph->check = CSUM_MANGLED_0;
2834 }
2835
2836#ifdef CONFIG_XFRM
2837 if (!process_ipsec(pkt_dev, skb, protocol))
2838 return NULL;
2839#endif
2840
2841 return skb;
2842}
2843
2844static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2845 struct pktgen_dev *pkt_dev)
2846{
2847 struct sk_buff *skb = NULL;
2848 __u8 *eth;
2849 struct udphdr *udph;
2850 int datalen, udplen;
2851 struct ipv6hdr *iph;
2852 __be16 protocol = htons(ETH_P_IPV6);
2853 __be32 *mpls;
2854 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2855 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2856 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2857 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2858 u16 queue_map;
2859
2860 if (pkt_dev->nr_labels)
2861 protocol = htons(ETH_P_MPLS_UC);
2862
2863 if (pkt_dev->vlan_id != 0xffff)
2864 protocol = htons(ETH_P_8021Q);
2865
2866 /* Update any of the values, used when we're incrementing various
2867 * fields.
2868 */
2869 mod_cur_headers(pkt_dev);
2870 queue_map = pkt_dev->cur_queue_map;
2871
2872 skb = pktgen_alloc_skb(odev, pkt_dev);
2873 if (!skb) {
2874 sprintf(pkt_dev->result, "No memory");
2875 return NULL;
2876 }
2877
2878 prefetchw(skb->data);
2879 skb_reserve(skb, 16);
2880
2881 /* Reserve for ethernet and IP header */
2882 eth = skb_push(skb, 14);
2883 mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32));
2884 if (pkt_dev->nr_labels)
2885 mpls_push(mpls, pkt_dev);
2886
2887 if (pkt_dev->vlan_id != 0xffff) {
2888 if (pkt_dev->svlan_id != 0xffff) {
2889 svlan_tci = skb_put(skb, sizeof(__be16));
2890 *svlan_tci = build_tci(pkt_dev->svlan_id,
2891 pkt_dev->svlan_cfi,
2892 pkt_dev->svlan_p);
2893 svlan_encapsulated_proto = skb_put(skb,
2894 sizeof(__be16));
2895 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2896 }
2897 vlan_tci = skb_put(skb, sizeof(__be16));
2898 *vlan_tci = build_tci(pkt_dev->vlan_id,
2899 pkt_dev->vlan_cfi,
2900 pkt_dev->vlan_p);
2901 vlan_encapsulated_proto = skb_put(skb, sizeof(__be16));
2902 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2903 }
2904
2905 skb_reset_mac_header(skb);
2906 skb_set_network_header(skb, skb->len);
2907 iph = skb_put(skb, sizeof(struct ipv6hdr));
2908
2909 skb_set_transport_header(skb, skb->len);
2910 udph = skb_put(skb, sizeof(struct udphdr));
2911 skb_set_queue_mapping(skb, queue_map);
2912 skb->priority = pkt_dev->skb_priority;
2913
2914 memcpy(eth, pkt_dev->hh, 12);
2915 *(__be16 *) ð[12] = protocol;
2916
2917 /* Eth + IPh + UDPh + mpls */
2918 datalen = pkt_dev->cur_pkt_size - 14 -
2919 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2920 pkt_dev->pkt_overhead;
2921
2922 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
2923 datalen = sizeof(struct pktgen_hdr);
2924 net_info_ratelimited("increased datalen to %d\n", datalen);
2925 }
2926
2927 udplen = datalen + sizeof(struct udphdr);
2928 udph->source = htons(pkt_dev->cur_udp_src);
2929 udph->dest = htons(pkt_dev->cur_udp_dst);
2930 udph->len = htons(udplen);
2931 udph->check = 0;
2932
2933 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2934
2935 if (pkt_dev->traffic_class) {
2936 /* Version + traffic class + flow (0) */
2937 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2938 }
2939
2940 iph->hop_limit = 32;
2941
2942 iph->payload_len = htons(udplen);
2943 iph->nexthdr = IPPROTO_UDP;
2944
2945 iph->daddr = pkt_dev->cur_in6_daddr;
2946 iph->saddr = pkt_dev->cur_in6_saddr;
2947
2948 skb->protocol = protocol;
2949 skb->dev = odev;
2950 skb->pkt_type = PACKET_HOST;
2951
2952 pktgen_finalize_skb(pkt_dev, skb, datalen);
2953
2954 if (!(pkt_dev->flags & F_UDPCSUM)) {
2955 skb->ip_summed = CHECKSUM_NONE;
2956 } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IPV6_CSUM)) {
2957 skb->ip_summed = CHECKSUM_PARTIAL;
2958 skb->csum_start = skb_transport_header(skb) - skb->head;
2959 skb->csum_offset = offsetof(struct udphdr, check);
2960 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0);
2961 } else {
2962 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), udplen, 0);
2963
2964 /* add protocol-dependent pseudo-header */
2965 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum);
2966
2967 if (udph->check == 0)
2968 udph->check = CSUM_MANGLED_0;
2969 }
2970
2971 return skb;
2972}
2973
2974static struct sk_buff *fill_packet(struct net_device *odev,
2975 struct pktgen_dev *pkt_dev)
2976{
2977 if (pkt_dev->flags & F_IPV6)
2978 return fill_packet_ipv6(odev, pkt_dev);
2979 else
2980 return fill_packet_ipv4(odev, pkt_dev);
2981}
2982
2983static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2984{
2985 pkt_dev->seq_num = 1;
2986 pkt_dev->idle_acc = 0;
2987 pkt_dev->sofar = 0;
2988 pkt_dev->tx_bytes = 0;
2989 pkt_dev->errors = 0;
2990}
2991
2992/* Set up structure for sending pkts, clear counters */
2993
2994static void pktgen_run(struct pktgen_thread *t)
2995{
2996 struct pktgen_dev *pkt_dev;
2997 int started = 0;
2998
2999 func_enter();
3000
3001 rcu_read_lock();
3002 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3003
3004 /*
3005 * setup odev and create initial packet.
3006 */
3007 pktgen_setup_inject(pkt_dev);
3008
3009 if (pkt_dev->odev) {
3010 pktgen_clear_counters(pkt_dev);
3011 pkt_dev->skb = NULL;
3012 pkt_dev->started_at = pkt_dev->next_tx = ktime_get();
3013
3014 set_pkt_overhead(pkt_dev);
3015
3016 strcpy(pkt_dev->result, "Starting");
3017 pkt_dev->running = 1; /* Cranke yeself! */
3018 started++;
3019 } else
3020 strcpy(pkt_dev->result, "Error starting");
3021 }
3022 rcu_read_unlock();
3023 if (started)
3024 t->control &= ~(T_STOP);
3025}
3026
3027static void pktgen_handle_all_threads(struct pktgen_net *pn, u32 flags)
3028{
3029 struct pktgen_thread *t;
3030
3031 mutex_lock(&pktgen_thread_lock);
3032
3033 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3034 t->control |= (flags);
3035
3036 mutex_unlock(&pktgen_thread_lock);
3037}
3038
3039static void pktgen_stop_all_threads(struct pktgen_net *pn)
3040{
3041 func_enter();
3042
3043 pktgen_handle_all_threads(pn, T_STOP);
3044}
3045
3046static int thread_is_running(const struct pktgen_thread *t)
3047{
3048 const struct pktgen_dev *pkt_dev;
3049
3050 rcu_read_lock();
3051 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
3052 if (pkt_dev->running) {
3053 rcu_read_unlock();
3054 return 1;
3055 }
3056 rcu_read_unlock();
3057 return 0;
3058}
3059
3060static int pktgen_wait_thread_run(struct pktgen_thread *t)
3061{
3062 while (thread_is_running(t)) {
3063
3064 /* note: 't' will still be around even after the unlock/lock
3065 * cycle because pktgen_thread threads are only cleared at
3066 * net exit
3067 */
3068 mutex_unlock(&pktgen_thread_lock);
3069 msleep_interruptible(100);
3070 mutex_lock(&pktgen_thread_lock);
3071
3072 if (signal_pending(current))
3073 goto signal;
3074 }
3075 return 1;
3076signal:
3077 return 0;
3078}
3079
3080static int pktgen_wait_all_threads_run(struct pktgen_net *pn)
3081{
3082 struct pktgen_thread *t;
3083 int sig = 1;
3084
3085 /* prevent from racing with rmmod */
3086 if (!try_module_get(THIS_MODULE))
3087 return sig;
3088
3089 mutex_lock(&pktgen_thread_lock);
3090
3091 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
3092 sig = pktgen_wait_thread_run(t);
3093 if (sig == 0)
3094 break;
3095 }
3096
3097 if (sig == 0)
3098 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3099 t->control |= (T_STOP);
3100
3101 mutex_unlock(&pktgen_thread_lock);
3102 module_put(THIS_MODULE);
3103 return sig;
3104}
3105
3106static void pktgen_run_all_threads(struct pktgen_net *pn)
3107{
3108 func_enter();
3109
3110 pktgen_handle_all_threads(pn, T_RUN);
3111
3112 /* Propagate thread->control */
3113 schedule_timeout_interruptible(msecs_to_jiffies(125));
3114
3115 pktgen_wait_all_threads_run(pn);
3116}
3117
3118static void pktgen_reset_all_threads(struct pktgen_net *pn)
3119{
3120 func_enter();
3121
3122 pktgen_handle_all_threads(pn, T_REMDEVALL);
3123
3124 /* Propagate thread->control */
3125 schedule_timeout_interruptible(msecs_to_jiffies(125));
3126
3127 pktgen_wait_all_threads_run(pn);
3128}
3129
3130static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3131{
3132 __u64 bps, mbps, pps;
3133 char *p = pkt_dev->result;
3134 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3135 pkt_dev->started_at);
3136 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3137
3138 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3139 (unsigned long long)ktime_to_us(elapsed),
3140 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3141 (unsigned long long)ktime_to_us(idle),
3142 (unsigned long long)pkt_dev->sofar,
3143 pkt_dev->cur_pkt_size, nr_frags);
3144
3145 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3146 ktime_to_ns(elapsed));
3147
3148 bps = pps * 8 * pkt_dev->cur_pkt_size;
3149
3150 mbps = bps;
3151 do_div(mbps, 1000000);
3152 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3153 (unsigned long long)pps,
3154 (unsigned long long)mbps,
3155 (unsigned long long)bps,
3156 (unsigned long long)pkt_dev->errors);
3157}
3158
3159/* Set stopped-at timer, remove from running list, do counters & statistics */
3160static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3161{
3162 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3163
3164 if (!pkt_dev->running) {
3165 pr_warn("interface: %s is already stopped\n",
3166 pkt_dev->odevname);
3167 return -EINVAL;
3168 }
3169
3170 pkt_dev->running = 0;
3171 kfree_skb(pkt_dev->skb);
3172 pkt_dev->skb = NULL;
3173 pkt_dev->stopped_at = ktime_get();
3174
3175 show_results(pkt_dev, nr_frags);
3176
3177 return 0;
3178}
3179
3180static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3181{
3182 struct pktgen_dev *pkt_dev, *best = NULL;
3183
3184 rcu_read_lock();
3185 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3186 if (!pkt_dev->running)
3187 continue;
3188 if (best == NULL)
3189 best = pkt_dev;
3190 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0)
3191 best = pkt_dev;
3192 }
3193 rcu_read_unlock();
3194
3195 return best;
3196}
3197
3198static void pktgen_stop(struct pktgen_thread *t)
3199{
3200 struct pktgen_dev *pkt_dev;
3201
3202 func_enter();
3203
3204 rcu_read_lock();
3205
3206 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3207 pktgen_stop_device(pkt_dev);
3208 }
3209
3210 rcu_read_unlock();
3211}
3212
3213/*
3214 * one of our devices needs to be removed - find it
3215 * and remove it
3216 */
3217static void pktgen_rem_one_if(struct pktgen_thread *t)
3218{
3219 struct list_head *q, *n;
3220 struct pktgen_dev *cur;
3221
3222 func_enter();
3223
3224 list_for_each_safe(q, n, &t->if_list) {
3225 cur = list_entry(q, struct pktgen_dev, list);
3226
3227 if (!cur->removal_mark)
3228 continue;
3229
3230 kfree_skb(cur->skb);
3231 cur->skb = NULL;
3232
3233 pktgen_remove_device(t, cur);
3234
3235 break;
3236 }
3237}
3238
3239static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3240{
3241 struct list_head *q, *n;
3242 struct pktgen_dev *cur;
3243
3244 func_enter();
3245
3246 /* Remove all devices, free mem */
3247
3248 list_for_each_safe(q, n, &t->if_list) {
3249 cur = list_entry(q, struct pktgen_dev, list);
3250
3251 kfree_skb(cur->skb);
3252 cur->skb = NULL;
3253
3254 pktgen_remove_device(t, cur);
3255 }
3256}
3257
3258static void pktgen_rem_thread(struct pktgen_thread *t)
3259{
3260 /* Remove from the thread list */
3261 remove_proc_entry(t->tsk->comm, t->net->proc_dir);
3262}
3263
3264static void pktgen_resched(struct pktgen_dev *pkt_dev)
3265{
3266 ktime_t idle_start = ktime_get();
3267 schedule();
3268 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3269}
3270
3271static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3272{
3273 ktime_t idle_start = ktime_get();
3274
3275 while (refcount_read(&(pkt_dev->skb->users)) != 1) {
3276 if (signal_pending(current))
3277 break;
3278
3279 if (need_resched())
3280 pktgen_resched(pkt_dev);
3281 else
3282 cpu_relax();
3283 }
3284 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3285}
3286
3287static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3288{
3289 unsigned int burst = READ_ONCE(pkt_dev->burst);
3290 struct net_device *odev = pkt_dev->odev;
3291 struct netdev_queue *txq;
3292 struct sk_buff *skb;
3293 int ret;
3294
3295 /* If device is offline, then don't send */
3296 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3297 pktgen_stop_device(pkt_dev);
3298 return;
3299 }
3300
3301 /* This is max DELAY, this has special meaning of
3302 * "never transmit"
3303 */
3304 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3305 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
3306 return;
3307 }
3308
3309 /* If no skb or clone count exhausted then get new one */
3310 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3311 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3312 /* build a new pkt */
3313 kfree_skb(pkt_dev->skb);
3314
3315 pkt_dev->skb = fill_packet(odev, pkt_dev);
3316 if (pkt_dev->skb == NULL) {
3317 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3318 schedule();
3319 pkt_dev->clone_count--; /* back out increment, OOM */
3320 return;
3321 }
3322 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3323 pkt_dev->clone_count = 0; /* reset counter */
3324 }
3325
3326 if (pkt_dev->delay && pkt_dev->last_ok)
3327 spin(pkt_dev, pkt_dev->next_tx);
3328
3329 if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) {
3330 skb = pkt_dev->skb;
3331 skb->protocol = eth_type_trans(skb, skb->dev);
3332 refcount_add(burst, &skb->users);
3333 local_bh_disable();
3334 do {
3335 ret = netif_receive_skb(skb);
3336 if (ret == NET_RX_DROP)
3337 pkt_dev->errors++;
3338 pkt_dev->sofar++;
3339 pkt_dev->seq_num++;
3340 if (refcount_read(&skb->users) != burst) {
3341 /* skb was queued by rps/rfs or taps,
3342 * so cannot reuse this skb
3343 */
3344 WARN_ON(refcount_sub_and_test(burst - 1, &skb->users));
3345 /* get out of the loop and wait
3346 * until skb is consumed
3347 */
3348 break;
3349 }
3350 /* skb was 'freed' by stack, so clean few
3351 * bits and reuse it
3352 */
3353 skb_reset_redirect(skb);
3354 } while (--burst > 0);
3355 goto out; /* Skips xmit_mode M_START_XMIT */
3356 } else if (pkt_dev->xmit_mode == M_QUEUE_XMIT) {
3357 local_bh_disable();
3358 refcount_inc(&pkt_dev->skb->users);
3359
3360 ret = dev_queue_xmit(pkt_dev->skb);
3361 switch (ret) {
3362 case NET_XMIT_SUCCESS:
3363 pkt_dev->sofar++;
3364 pkt_dev->seq_num++;
3365 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3366 break;
3367 case NET_XMIT_DROP:
3368 case NET_XMIT_CN:
3369 /* These are all valid return codes for a qdisc but
3370 * indicate packets are being dropped or will likely
3371 * be dropped soon.
3372 */
3373 case NETDEV_TX_BUSY:
3374 /* qdisc may call dev_hard_start_xmit directly in cases
3375 * where no queues exist e.g. loopback device, virtual
3376 * devices, etc. In this case we need to handle
3377 * NETDEV_TX_ codes.
3378 */
3379 default:
3380 pkt_dev->errors++;
3381 net_info_ratelimited("%s xmit error: %d\n",
3382 pkt_dev->odevname, ret);
3383 break;
3384 }
3385 goto out;
3386 }
3387
3388 txq = skb_get_tx_queue(odev, pkt_dev->skb);
3389
3390 local_bh_disable();
3391
3392 HARD_TX_LOCK(odev, txq, smp_processor_id());
3393
3394 if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) {
3395 pkt_dev->last_ok = 0;
3396 goto unlock;
3397 }
3398 refcount_add(burst, &pkt_dev->skb->users);
3399
3400xmit_more:
3401 ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0);
3402
3403 switch (ret) {
3404 case NETDEV_TX_OK:
3405 pkt_dev->last_ok = 1;
3406 pkt_dev->sofar++;
3407 pkt_dev->seq_num++;
3408 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3409 if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq))
3410 goto xmit_more;
3411 break;
3412 case NET_XMIT_DROP:
3413 case NET_XMIT_CN:
3414 /* skb has been consumed */
3415 pkt_dev->errors++;
3416 break;
3417 default: /* Drivers are not supposed to return other values! */
3418 net_info_ratelimited("%s xmit error: %d\n",
3419 pkt_dev->odevname, ret);
3420 pkt_dev->errors++;
3421 fallthrough;
3422 case NETDEV_TX_BUSY:
3423 /* Retry it next time */
3424 refcount_dec(&(pkt_dev->skb->users));
3425 pkt_dev->last_ok = 0;
3426 }
3427 if (unlikely(burst))
3428 WARN_ON(refcount_sub_and_test(burst, &pkt_dev->skb->users));
3429unlock:
3430 HARD_TX_UNLOCK(odev, txq);
3431
3432out:
3433 local_bh_enable();
3434
3435 /* If pkt_dev->count is zero, then run forever */
3436 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3437 pktgen_wait_for_skb(pkt_dev);
3438
3439 /* Done with this */
3440 pktgen_stop_device(pkt_dev);
3441 }
3442}
3443
3444/*
3445 * Main loop of the thread goes here
3446 */
3447
3448static int pktgen_thread_worker(void *arg)
3449{
3450 DEFINE_WAIT(wait);
3451 struct pktgen_thread *t = arg;
3452 struct pktgen_dev *pkt_dev = NULL;
3453 int cpu = t->cpu;
3454
3455 WARN_ON(smp_processor_id() != cpu);
3456
3457 init_waitqueue_head(&t->queue);
3458 complete(&t->start_done);
3459
3460 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3461
3462 set_freezable();
3463
3464 while (!kthread_should_stop()) {
3465 pkt_dev = next_to_run(t);
3466
3467 if (unlikely(!pkt_dev && t->control == 0)) {
3468 if (t->net->pktgen_exiting)
3469 break;
3470 wait_event_interruptible_timeout(t->queue,
3471 t->control != 0,
3472 HZ/10);
3473 try_to_freeze();
3474 continue;
3475 }
3476
3477 if (likely(pkt_dev)) {
3478 pktgen_xmit(pkt_dev);
3479
3480 if (need_resched())
3481 pktgen_resched(pkt_dev);
3482 else
3483 cpu_relax();
3484 }
3485
3486 if (t->control & T_STOP) {
3487 pktgen_stop(t);
3488 t->control &= ~(T_STOP);
3489 }
3490
3491 if (t->control & T_RUN) {
3492 pktgen_run(t);
3493 t->control &= ~(T_RUN);
3494 }
3495
3496 if (t->control & T_REMDEVALL) {
3497 pktgen_rem_all_ifs(t);
3498 t->control &= ~(T_REMDEVALL);
3499 }
3500
3501 if (t->control & T_REMDEV) {
3502 pktgen_rem_one_if(t);
3503 t->control &= ~(T_REMDEV);
3504 }
3505
3506 try_to_freeze();
3507 }
3508
3509 pr_debug("%s stopping all device\n", t->tsk->comm);
3510 pktgen_stop(t);
3511
3512 pr_debug("%s removing all device\n", t->tsk->comm);
3513 pktgen_rem_all_ifs(t);
3514
3515 pr_debug("%s removing thread\n", t->tsk->comm);
3516 pktgen_rem_thread(t);
3517
3518 return 0;
3519}
3520
3521static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3522 const char *ifname, bool exact)
3523{
3524 struct pktgen_dev *p, *pkt_dev = NULL;
3525 size_t len = strlen(ifname);
3526
3527 rcu_read_lock();
3528 list_for_each_entry_rcu(p, &t->if_list, list)
3529 if (strncmp(p->odevname, ifname, len) == 0) {
3530 if (p->odevname[len]) {
3531 if (exact || p->odevname[len] != '@')
3532 continue;
3533 }
3534 pkt_dev = p;
3535 break;
3536 }
3537
3538 rcu_read_unlock();
3539 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3540 return pkt_dev;
3541}
3542
3543/*
3544 * Adds a dev at front of if_list.
3545 */
3546
3547static int add_dev_to_thread(struct pktgen_thread *t,
3548 struct pktgen_dev *pkt_dev)
3549{
3550 int rv = 0;
3551
3552 /* This function cannot be called concurrently, as its called
3553 * under pktgen_thread_lock mutex, but it can run from
3554 * userspace on another CPU than the kthread. The if_lock()
3555 * is used here to sync with concurrent instances of
3556 * _rem_dev_from_if_list() invoked via kthread, which is also
3557 * updating the if_list */
3558 if_lock(t);
3559
3560 if (pkt_dev->pg_thread) {
3561 pr_err("ERROR: already assigned to a thread\n");
3562 rv = -EBUSY;
3563 goto out;
3564 }
3565
3566 pkt_dev->running = 0;
3567 pkt_dev->pg_thread = t;
3568 list_add_rcu(&pkt_dev->list, &t->if_list);
3569
3570out:
3571 if_unlock(t);
3572 return rv;
3573}
3574
3575/* Called under thread lock */
3576
3577static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3578{
3579 struct pktgen_dev *pkt_dev;
3580 int err;
3581 int node = cpu_to_node(t->cpu);
3582
3583 /* We don't allow a device to be on several threads */
3584
3585 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND);
3586 if (pkt_dev) {
3587 pr_err("ERROR: interface already used\n");
3588 return -EBUSY;
3589 }
3590
3591 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3592 if (!pkt_dev)
3593 return -ENOMEM;
3594
3595 strcpy(pkt_dev->odevname, ifname);
3596 pkt_dev->flows = vzalloc_node(array_size(MAX_CFLOWS,
3597 sizeof(struct flow_state)),
3598 node);
3599 if (pkt_dev->flows == NULL) {
3600 kfree(pkt_dev);
3601 return -ENOMEM;
3602 }
3603
3604 pkt_dev->removal_mark = 0;
3605 pkt_dev->nfrags = 0;
3606 pkt_dev->delay = pg_delay_d;
3607 pkt_dev->count = pg_count_d;
3608 pkt_dev->sofar = 0;
3609 pkt_dev->udp_src_min = 9; /* sink port */
3610 pkt_dev->udp_src_max = 9;
3611 pkt_dev->udp_dst_min = 9;
3612 pkt_dev->udp_dst_max = 9;
3613 pkt_dev->vlan_p = 0;
3614 pkt_dev->vlan_cfi = 0;
3615 pkt_dev->vlan_id = 0xffff;
3616 pkt_dev->svlan_p = 0;
3617 pkt_dev->svlan_cfi = 0;
3618 pkt_dev->svlan_id = 0xffff;
3619 pkt_dev->burst = 1;
3620 pkt_dev->node = NUMA_NO_NODE;
3621
3622 err = pktgen_setup_dev(t->net, pkt_dev, ifname);
3623 if (err)
3624 goto out1;
3625 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3626 pkt_dev->clone_skb = pg_clone_skb_d;
3627
3628 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir,
3629 &pktgen_if_proc_ops, pkt_dev);
3630 if (!pkt_dev->entry) {
3631 pr_err("cannot create %s/%s procfs entry\n",
3632 PG_PROC_DIR, ifname);
3633 err = -EINVAL;
3634 goto out2;
3635 }
3636#ifdef CONFIG_XFRM
3637 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3638 pkt_dev->ipsproto = IPPROTO_ESP;
3639
3640 /* xfrm tunnel mode needs additional dst to extract outter
3641 * ip header protocol/ttl/id field, here creat a phony one.
3642 * instead of looking for a valid rt, which definitely hurting
3643 * performance under such circumstance.
3644 */
3645 pkt_dev->dstops.family = AF_INET;
3646 pkt_dev->xdst.u.dst.dev = pkt_dev->odev;
3647 dst_init_metrics(&pkt_dev->xdst.u.dst, pktgen_dst_metrics, false);
3648 pkt_dev->xdst.child = &pkt_dev->xdst.u.dst;
3649 pkt_dev->xdst.u.dst.ops = &pkt_dev->dstops;
3650#endif
3651
3652 return add_dev_to_thread(t, pkt_dev);
3653out2:
3654 dev_put(pkt_dev->odev);
3655out1:
3656#ifdef CONFIG_XFRM
3657 free_SAs(pkt_dev);
3658#endif
3659 vfree(pkt_dev->flows);
3660 kfree(pkt_dev);
3661 return err;
3662}
3663
3664static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
3665{
3666 struct pktgen_thread *t;
3667 struct proc_dir_entry *pe;
3668 struct task_struct *p;
3669
3670 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3671 cpu_to_node(cpu));
3672 if (!t) {
3673 pr_err("ERROR: out of memory, can't create new thread\n");
3674 return -ENOMEM;
3675 }
3676
3677 mutex_init(&t->if_lock);
3678 t->cpu = cpu;
3679
3680 INIT_LIST_HEAD(&t->if_list);
3681
3682 list_add_tail(&t->th_list, &pn->pktgen_threads);
3683 init_completion(&t->start_done);
3684
3685 p = kthread_create_on_node(pktgen_thread_worker,
3686 t,
3687 cpu_to_node(cpu),
3688 "kpktgend_%d", cpu);
3689 if (IS_ERR(p)) {
3690 pr_err("kthread_create_on_node() failed for cpu %d\n", t->cpu);
3691 list_del(&t->th_list);
3692 kfree(t);
3693 return PTR_ERR(p);
3694 }
3695 kthread_bind(p, cpu);
3696 t->tsk = p;
3697
3698 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
3699 &pktgen_thread_proc_ops, t);
3700 if (!pe) {
3701 pr_err("cannot create %s/%s procfs entry\n",
3702 PG_PROC_DIR, t->tsk->comm);
3703 kthread_stop(p);
3704 list_del(&t->th_list);
3705 kfree(t);
3706 return -EINVAL;
3707 }
3708
3709 t->net = pn;
3710 get_task_struct(p);
3711 wake_up_process(p);
3712 wait_for_completion(&t->start_done);
3713
3714 return 0;
3715}
3716
3717/*
3718 * Removes a device from the thread if_list.
3719 */
3720static void _rem_dev_from_if_list(struct pktgen_thread *t,
3721 struct pktgen_dev *pkt_dev)
3722{
3723 struct list_head *q, *n;
3724 struct pktgen_dev *p;
3725
3726 if_lock(t);
3727 list_for_each_safe(q, n, &t->if_list) {
3728 p = list_entry(q, struct pktgen_dev, list);
3729 if (p == pkt_dev)
3730 list_del_rcu(&p->list);
3731 }
3732 if_unlock(t);
3733}
3734
3735static int pktgen_remove_device(struct pktgen_thread *t,
3736 struct pktgen_dev *pkt_dev)
3737{
3738 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3739
3740 if (pkt_dev->running) {
3741 pr_warn("WARNING: trying to remove a running interface, stopping it now\n");
3742 pktgen_stop_device(pkt_dev);
3743 }
3744
3745 /* Dis-associate from the interface */
3746
3747 if (pkt_dev->odev) {
3748 dev_put(pkt_dev->odev);
3749 pkt_dev->odev = NULL;
3750 }
3751
3752 /* Remove proc before if_list entry, because add_device uses
3753 * list to determine if interface already exist, avoid race
3754 * with proc_create_data() */
3755 proc_remove(pkt_dev->entry);
3756
3757 /* And update the thread if_list */
3758 _rem_dev_from_if_list(t, pkt_dev);
3759
3760#ifdef CONFIG_XFRM
3761 free_SAs(pkt_dev);
3762#endif
3763 vfree(pkt_dev->flows);
3764 if (pkt_dev->page)
3765 put_page(pkt_dev->page);
3766 kfree_rcu(pkt_dev, rcu);
3767 return 0;
3768}
3769
3770static int __net_init pg_net_init(struct net *net)
3771{
3772 struct pktgen_net *pn = net_generic(net, pg_net_id);
3773 struct proc_dir_entry *pe;
3774 int cpu, ret = 0;
3775
3776 pn->net = net;
3777 INIT_LIST_HEAD(&pn->pktgen_threads);
3778 pn->pktgen_exiting = false;
3779 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net);
3780 if (!pn->proc_dir) {
3781 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR);
3782 return -ENODEV;
3783 }
3784 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_proc_ops);
3785 if (pe == NULL) {
3786 pr_err("cannot create %s procfs entry\n", PGCTRL);
3787 ret = -EINVAL;
3788 goto remove;
3789 }
3790
3791 for_each_online_cpu(cpu) {
3792 int err;
3793
3794 err = pktgen_create_thread(cpu, pn);
3795 if (err)
3796 pr_warn("Cannot create thread for cpu %d (%d)\n",
3797 cpu, err);
3798 }
3799
3800 if (list_empty(&pn->pktgen_threads)) {
3801 pr_err("Initialization failed for all threads\n");
3802 ret = -ENODEV;
3803 goto remove_entry;
3804 }
3805
3806 return 0;
3807
3808remove_entry:
3809 remove_proc_entry(PGCTRL, pn->proc_dir);
3810remove:
3811 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3812 return ret;
3813}
3814
3815static void __net_exit pg_net_exit(struct net *net)
3816{
3817 struct pktgen_net *pn = net_generic(net, pg_net_id);
3818 struct pktgen_thread *t;
3819 struct list_head *q, *n;
3820 LIST_HEAD(list);
3821
3822 /* Stop all interfaces & threads */
3823 pn->pktgen_exiting = true;
3824
3825 mutex_lock(&pktgen_thread_lock);
3826 list_splice_init(&pn->pktgen_threads, &list);
3827 mutex_unlock(&pktgen_thread_lock);
3828
3829 list_for_each_safe(q, n, &list) {
3830 t = list_entry(q, struct pktgen_thread, th_list);
3831 list_del(&t->th_list);
3832 kthread_stop(t->tsk);
3833 put_task_struct(t->tsk);
3834 kfree(t);
3835 }
3836
3837 remove_proc_entry(PGCTRL, pn->proc_dir);
3838 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3839}
3840
3841static struct pernet_operations pg_net_ops = {
3842 .init = pg_net_init,
3843 .exit = pg_net_exit,
3844 .id = &pg_net_id,
3845 .size = sizeof(struct pktgen_net),
3846};
3847
3848static int __init pg_init(void)
3849{
3850 int ret = 0;
3851
3852 pr_info("%s", version);
3853 ret = register_pernet_subsys(&pg_net_ops);
3854 if (ret)
3855 return ret;
3856 ret = register_netdevice_notifier(&pktgen_notifier_block);
3857 if (ret)
3858 unregister_pernet_subsys(&pg_net_ops);
3859
3860 return ret;
3861}
3862
3863static void __exit pg_cleanup(void)
3864{
3865 unregister_netdevice_notifier(&pktgen_notifier_block);
3866 unregister_pernet_subsys(&pg_net_ops);
3867 /* Don't need rcu_barrier() due to use of kfree_rcu() */
3868}
3869
3870module_init(pg_init);
3871module_exit(pg_cleanup);
3872
3873MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3874MODULE_DESCRIPTION("Packet Generator tool");
3875MODULE_LICENSE("GPL");
3876MODULE_VERSION(VERSION);
3877module_param(pg_count_d, int, 0);
3878MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3879module_param(pg_delay_d, int, 0);
3880MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3881module_param(pg_clone_skb_d, int, 0);
3882MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3883module_param(debug, int, 0);
3884MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
1/*
2 * Authors:
3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
4 * Uppsala University and
5 * Swedish University of Agricultural Sciences
6 *
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 * Ben Greear <greearb@candelatech.com>
9 * Jens Låås <jens.laas@data.slu.se>
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 *
16 *
17 * A tool for loading the network with preconfigurated packets.
18 * The tool is implemented as a linux module. Parameters are output
19 * device, delay (to hard_xmit), number of packets, and whether
20 * to use multiple SKBs or just the same one.
21 * pktgen uses the installed interface's output routine.
22 *
23 * Additional hacking by:
24 *
25 * Jens.Laas@data.slu.se
26 * Improved by ANK. 010120.
27 * Improved by ANK even more. 010212.
28 * MAC address typo fixed. 010417 --ro
29 * Integrated. 020301 --DaveM
30 * Added multiskb option 020301 --DaveM
31 * Scaling of results. 020417--sigurdur@linpro.no
32 * Significant re-work of the module:
33 * * Convert to threaded model to more efficiently be able to transmit
34 * and receive on multiple interfaces at once.
35 * * Converted many counters to __u64 to allow longer runs.
36 * * Allow configuration of ranges, like min/max IP address, MACs,
37 * and UDP-ports, for both source and destination, and can
38 * set to use a random distribution or sequentially walk the range.
39 * * Can now change most values after starting.
40 * * Place 12-byte packet in UDP payload with magic number,
41 * sequence number, and timestamp.
42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and
43 * latencies (with micro-second) precision.
44 * * Add IOCTL interface to easily get counters & configuration.
45 * --Ben Greear <greearb@candelatech.com>
46 *
47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
49 * as a "fastpath" with a configurable number of clones after alloc's.
50 * clone_skb=0 means all packets are allocated this also means ranges time
51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
52 * clones.
53 *
54 * Also moved to /proc/net/pktgen/
55 * --ro
56 *
57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
58 * mistakes. Also merged in DaveM's patch in the -pre6 patch.
59 * --Ben Greear <greearb@candelatech.com>
60 *
61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
62 *
63 *
64 * 021124 Finished major redesign and rewrite for new functionality.
65 * See Documentation/networking/pktgen.txt for how to use this.
66 *
67 * The new operation:
68 * For each CPU one thread/process is created at start. This process checks
69 * for running devices in the if_list and sends packets until count is 0 it
70 * also the thread checks the thread->control which is used for inter-process
71 * communication. controlling process "posts" operations to the threads this
72 * way.
73 * The if_list is RCU protected, and the if_lock remains to protect updating
74 * of if_list, from "add_device" as it invoked from userspace (via proc write).
75 *
76 * By design there should only be *one* "controlling" process. In practice
77 * multiple write accesses gives unpredictable result. Understood by "write"
78 * to /proc gives result code thats should be read be the "writer".
79 * For practical use this should be no problem.
80 *
81 * Note when adding devices to a specific CPU there good idea to also assign
82 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
83 * --ro
84 *
85 * Fix refcount off by one if first packet fails, potential null deref,
86 * memleak 030710- KJP
87 *
88 * First "ranges" functionality for ipv6 030726 --ro
89 *
90 * Included flow support. 030802 ANK.
91 *
92 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
93 *
94 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
95 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
96 *
97 * New xmit() return, do_div and misc clean up by Stephen Hemminger
98 * <shemminger@osdl.org> 040923
99 *
100 * Randy Dunlap fixed u64 printk compiler warning
101 *
102 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
103 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
104 *
105 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
106 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
107 *
108 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
109 * 050103
110 *
111 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
112 *
113 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
114 *
115 * Fixed src_mac command to set source mac of packet to value specified in
116 * command by Adit Ranadive <adit.262@gmail.com>
117 *
118 */
119
120#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
121
122#include <linux/sys.h>
123#include <linux/types.h>
124#include <linux/module.h>
125#include <linux/moduleparam.h>
126#include <linux/kernel.h>
127#include <linux/mutex.h>
128#include <linux/sched.h>
129#include <linux/slab.h>
130#include <linux/vmalloc.h>
131#include <linux/unistd.h>
132#include <linux/string.h>
133#include <linux/ptrace.h>
134#include <linux/errno.h>
135#include <linux/ioport.h>
136#include <linux/interrupt.h>
137#include <linux/capability.h>
138#include <linux/hrtimer.h>
139#include <linux/freezer.h>
140#include <linux/delay.h>
141#include <linux/timer.h>
142#include <linux/list.h>
143#include <linux/init.h>
144#include <linux/skbuff.h>
145#include <linux/netdevice.h>
146#include <linux/inet.h>
147#include <linux/inetdevice.h>
148#include <linux/rtnetlink.h>
149#include <linux/if_arp.h>
150#include <linux/if_vlan.h>
151#include <linux/in.h>
152#include <linux/ip.h>
153#include <linux/ipv6.h>
154#include <linux/udp.h>
155#include <linux/proc_fs.h>
156#include <linux/seq_file.h>
157#include <linux/wait.h>
158#include <linux/etherdevice.h>
159#include <linux/kthread.h>
160#include <linux/prefetch.h>
161#include <net/net_namespace.h>
162#include <net/checksum.h>
163#include <net/ipv6.h>
164#include <net/udp.h>
165#include <net/ip6_checksum.h>
166#include <net/addrconf.h>
167#ifdef CONFIG_XFRM
168#include <net/xfrm.h>
169#endif
170#include <net/netns/generic.h>
171#include <asm/byteorder.h>
172#include <linux/rcupdate.h>
173#include <linux/bitops.h>
174#include <linux/io.h>
175#include <linux/timex.h>
176#include <linux/uaccess.h>
177#include <asm/dma.h>
178#include <asm/div64.h> /* do_div */
179
180#define VERSION "2.75"
181#define IP_NAME_SZ 32
182#define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
183#define MPLS_STACK_BOTTOM htonl(0x00000100)
184
185#define func_enter() pr_debug("entering %s\n", __func__);
186
187/* Device flag bits */
188#define F_IPSRC_RND (1<<0) /* IP-Src Random */
189#define F_IPDST_RND (1<<1) /* IP-Dst Random */
190#define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
191#define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
192#define F_MACSRC_RND (1<<4) /* MAC-Src Random */
193#define F_MACDST_RND (1<<5) /* MAC-Dst Random */
194#define F_TXSIZE_RND (1<<6) /* Transmit size is random */
195#define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
196#define F_MPLS_RND (1<<8) /* Random MPLS labels */
197#define F_VID_RND (1<<9) /* Random VLAN ID */
198#define F_SVID_RND (1<<10) /* Random SVLAN ID */
199#define F_FLOW_SEQ (1<<11) /* Sequential flows */
200#define F_IPSEC_ON (1<<12) /* ipsec on for flows */
201#define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
202#define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
203#define F_NODE (1<<15) /* Node memory alloc*/
204#define F_UDPCSUM (1<<16) /* Include UDP checksum */
205#define F_NO_TIMESTAMP (1<<17) /* Don't timestamp packets (default TS) */
206
207/* Thread control flag bits */
208#define T_STOP (1<<0) /* Stop run */
209#define T_RUN (1<<1) /* Start run */
210#define T_REMDEVALL (1<<2) /* Remove all devs */
211#define T_REMDEV (1<<3) /* Remove one dev */
212
213/* Xmit modes */
214#define M_START_XMIT 0 /* Default normal TX */
215#define M_NETIF_RECEIVE 1 /* Inject packets into stack */
216#define M_QUEUE_XMIT 2 /* Inject packet into qdisc */
217
218/* If lock -- protects updating of if_list */
219#define if_lock(t) mutex_lock(&(t->if_lock));
220#define if_unlock(t) mutex_unlock(&(t->if_lock));
221
222/* Used to help with determining the pkts on receive */
223#define PKTGEN_MAGIC 0xbe9be955
224#define PG_PROC_DIR "pktgen"
225#define PGCTRL "pgctrl"
226
227#define MAX_CFLOWS 65536
228
229#define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
230#define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
231
232struct flow_state {
233 __be32 cur_daddr;
234 int count;
235#ifdef CONFIG_XFRM
236 struct xfrm_state *x;
237#endif
238 __u32 flags;
239};
240
241/* flow flag bits */
242#define F_INIT (1<<0) /* flow has been initialized */
243
244struct pktgen_dev {
245 /*
246 * Try to keep frequent/infrequent used vars. separated.
247 */
248 struct proc_dir_entry *entry; /* proc file */
249 struct pktgen_thread *pg_thread;/* the owner */
250 struct list_head list; /* chaining in the thread's run-queue */
251 struct rcu_head rcu; /* freed by RCU */
252
253 int running; /* if false, the test will stop */
254
255 /* If min != max, then we will either do a linear iteration, or
256 * we will do a random selection from within the range.
257 */
258 __u32 flags;
259 int xmit_mode;
260 int min_pkt_size;
261 int max_pkt_size;
262 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
263 int nfrags;
264 int removal_mark; /* non-zero => the device is marked for
265 * removal by worker thread */
266
267 struct page *page;
268 u64 delay; /* nano-seconds */
269
270 __u64 count; /* Default No packets to send */
271 __u64 sofar; /* How many pkts we've sent so far */
272 __u64 tx_bytes; /* How many bytes we've transmitted */
273 __u64 errors; /* Errors when trying to transmit, */
274
275 /* runtime counters relating to clone_skb */
276
277 __u32 clone_count;
278 int last_ok; /* Was last skb sent?
279 * Or a failed transmit of some sort?
280 * This will keep sequence numbers in order
281 */
282 ktime_t next_tx;
283 ktime_t started_at;
284 ktime_t stopped_at;
285 u64 idle_acc; /* nano-seconds */
286
287 __u32 seq_num;
288
289 int clone_skb; /*
290 * Use multiple SKBs during packet gen.
291 * If this number is greater than 1, then
292 * that many copies of the same packet will be
293 * sent before a new packet is allocated.
294 * If you want to send 1024 identical packets
295 * before creating a new packet,
296 * set clone_skb to 1024.
297 */
298
299 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
300 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
301 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
302 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
303
304 struct in6_addr in6_saddr;
305 struct in6_addr in6_daddr;
306 struct in6_addr cur_in6_daddr;
307 struct in6_addr cur_in6_saddr;
308 /* For ranges */
309 struct in6_addr min_in6_daddr;
310 struct in6_addr max_in6_daddr;
311 struct in6_addr min_in6_saddr;
312 struct in6_addr max_in6_saddr;
313
314 /* If we're doing ranges, random or incremental, then this
315 * defines the min/max for those ranges.
316 */
317 __be32 saddr_min; /* inclusive, source IP address */
318 __be32 saddr_max; /* exclusive, source IP address */
319 __be32 daddr_min; /* inclusive, dest IP address */
320 __be32 daddr_max; /* exclusive, dest IP address */
321
322 __u16 udp_src_min; /* inclusive, source UDP port */
323 __u16 udp_src_max; /* exclusive, source UDP port */
324 __u16 udp_dst_min; /* inclusive, dest UDP port */
325 __u16 udp_dst_max; /* exclusive, dest UDP port */
326
327 /* DSCP + ECN */
328 __u8 tos; /* six MSB of (former) IPv4 TOS
329 are for dscp codepoint */
330 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
331 (see RFC 3260, sec. 4) */
332
333 /* MPLS */
334 unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */
335 __be32 labels[MAX_MPLS_LABELS];
336
337 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
338 __u8 vlan_p;
339 __u8 vlan_cfi;
340 __u16 vlan_id; /* 0xffff means no vlan tag */
341
342 __u8 svlan_p;
343 __u8 svlan_cfi;
344 __u16 svlan_id; /* 0xffff means no svlan tag */
345
346 __u32 src_mac_count; /* How many MACs to iterate through */
347 __u32 dst_mac_count; /* How many MACs to iterate through */
348
349 unsigned char dst_mac[ETH_ALEN];
350 unsigned char src_mac[ETH_ALEN];
351
352 __u32 cur_dst_mac_offset;
353 __u32 cur_src_mac_offset;
354 __be32 cur_saddr;
355 __be32 cur_daddr;
356 __u16 ip_id;
357 __u16 cur_udp_dst;
358 __u16 cur_udp_src;
359 __u16 cur_queue_map;
360 __u32 cur_pkt_size;
361 __u32 last_pkt_size;
362
363 __u8 hh[14];
364 /* = {
365 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
366
367 We fill in SRC address later
368 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
369 0x08, 0x00
370 };
371 */
372 __u16 pad; /* pad out the hh struct to an even 16 bytes */
373
374 struct sk_buff *skb; /* skb we are to transmit next, used for when we
375 * are transmitting the same one multiple times
376 */
377 struct net_device *odev; /* The out-going device.
378 * Note that the device should have it's
379 * pg_info pointer pointing back to this
380 * device.
381 * Set when the user specifies the out-going
382 * device name (not when the inject is
383 * started as it used to do.)
384 */
385 char odevname[32];
386 struct flow_state *flows;
387 unsigned int cflows; /* Concurrent flows (config) */
388 unsigned int lflow; /* Flow length (config) */
389 unsigned int nflows; /* accumulated flows (stats) */
390 unsigned int curfl; /* current sequenced flow (state)*/
391
392 u16 queue_map_min;
393 u16 queue_map_max;
394 __u32 skb_priority; /* skb priority field */
395 unsigned int burst; /* number of duplicated packets to burst */
396 int node; /* Memory node */
397
398#ifdef CONFIG_XFRM
399 __u8 ipsmode; /* IPSEC mode (config) */
400 __u8 ipsproto; /* IPSEC type (config) */
401 __u32 spi;
402 struct dst_entry dst;
403 struct dst_ops dstops;
404#endif
405 char result[512];
406};
407
408struct pktgen_hdr {
409 __be32 pgh_magic;
410 __be32 seq_num;
411 __be32 tv_sec;
412 __be32 tv_usec;
413};
414
415
416static unsigned int pg_net_id __read_mostly;
417
418struct pktgen_net {
419 struct net *net;
420 struct proc_dir_entry *proc_dir;
421 struct list_head pktgen_threads;
422 bool pktgen_exiting;
423};
424
425struct pktgen_thread {
426 struct mutex if_lock; /* for list of devices */
427 struct list_head if_list; /* All device here */
428 struct list_head th_list;
429 struct task_struct *tsk;
430 char result[512];
431
432 /* Field for thread to receive "posted" events terminate,
433 stop ifs etc. */
434
435 u32 control;
436 int cpu;
437
438 wait_queue_head_t queue;
439 struct completion start_done;
440 struct pktgen_net *net;
441};
442
443#define REMOVE 1
444#define FIND 0
445
446static const char version[] =
447 "Packet Generator for packet performance testing. "
448 "Version: " VERSION "\n";
449
450static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
451static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
452static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
453 const char *ifname, bool exact);
454static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
455static void pktgen_run_all_threads(struct pktgen_net *pn);
456static void pktgen_reset_all_threads(struct pktgen_net *pn);
457static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn);
458
459static void pktgen_stop(struct pktgen_thread *t);
460static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
461
462/* Module parameters, defaults. */
463static int pg_count_d __read_mostly = 1000;
464static int pg_delay_d __read_mostly;
465static int pg_clone_skb_d __read_mostly;
466static int debug __read_mostly;
467
468static DEFINE_MUTEX(pktgen_thread_lock);
469
470static struct notifier_block pktgen_notifier_block = {
471 .notifier_call = pktgen_device_event,
472};
473
474/*
475 * /proc handling functions
476 *
477 */
478
479static int pgctrl_show(struct seq_file *seq, void *v)
480{
481 seq_puts(seq, version);
482 return 0;
483}
484
485static ssize_t pgctrl_write(struct file *file, const char __user *buf,
486 size_t count, loff_t *ppos)
487{
488 char data[128];
489 struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
490
491 if (!capable(CAP_NET_ADMIN))
492 return -EPERM;
493
494 if (count == 0)
495 return -EINVAL;
496
497 if (count > sizeof(data))
498 count = sizeof(data);
499
500 if (copy_from_user(data, buf, count))
501 return -EFAULT;
502
503 data[count - 1] = 0; /* Strip trailing '\n' and terminate string */
504
505 if (!strcmp(data, "stop"))
506 pktgen_stop_all_threads_ifs(pn);
507
508 else if (!strcmp(data, "start"))
509 pktgen_run_all_threads(pn);
510
511 else if (!strcmp(data, "reset"))
512 pktgen_reset_all_threads(pn);
513
514 else
515 return -EINVAL;
516
517 return count;
518}
519
520static int pgctrl_open(struct inode *inode, struct file *file)
521{
522 return single_open(file, pgctrl_show, PDE_DATA(inode));
523}
524
525static const struct file_operations pktgen_fops = {
526 .owner = THIS_MODULE,
527 .open = pgctrl_open,
528 .read = seq_read,
529 .llseek = seq_lseek,
530 .write = pgctrl_write,
531 .release = single_release,
532};
533
534static int pktgen_if_show(struct seq_file *seq, void *v)
535{
536 const struct pktgen_dev *pkt_dev = seq->private;
537 ktime_t stopped;
538 u64 idle;
539
540 seq_printf(seq,
541 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
542 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
543 pkt_dev->max_pkt_size);
544
545 seq_printf(seq,
546 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
547 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
548 pkt_dev->clone_skb, pkt_dev->odevname);
549
550 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
551 pkt_dev->lflow);
552
553 seq_printf(seq,
554 " queue_map_min: %u queue_map_max: %u\n",
555 pkt_dev->queue_map_min,
556 pkt_dev->queue_map_max);
557
558 if (pkt_dev->skb_priority)
559 seq_printf(seq, " skb_priority: %u\n",
560 pkt_dev->skb_priority);
561
562 if (pkt_dev->flags & F_IPV6) {
563 seq_printf(seq,
564 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
565 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
566 &pkt_dev->in6_saddr,
567 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
568 &pkt_dev->in6_daddr,
569 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
570 } else {
571 seq_printf(seq,
572 " dst_min: %s dst_max: %s\n",
573 pkt_dev->dst_min, pkt_dev->dst_max);
574 seq_printf(seq,
575 " src_min: %s src_max: %s\n",
576 pkt_dev->src_min, pkt_dev->src_max);
577 }
578
579 seq_puts(seq, " src_mac: ");
580
581 seq_printf(seq, "%pM ",
582 is_zero_ether_addr(pkt_dev->src_mac) ?
583 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
584
585 seq_puts(seq, "dst_mac: ");
586 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
587
588 seq_printf(seq,
589 " udp_src_min: %d udp_src_max: %d"
590 " udp_dst_min: %d udp_dst_max: %d\n",
591 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
592 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
593
594 seq_printf(seq,
595 " src_mac_count: %d dst_mac_count: %d\n",
596 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
597
598 if (pkt_dev->nr_labels) {
599 unsigned int i;
600 seq_puts(seq, " mpls: ");
601 for (i = 0; i < pkt_dev->nr_labels; i++)
602 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
603 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
604 }
605
606 if (pkt_dev->vlan_id != 0xffff)
607 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
608 pkt_dev->vlan_id, pkt_dev->vlan_p,
609 pkt_dev->vlan_cfi);
610
611 if (pkt_dev->svlan_id != 0xffff)
612 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
613 pkt_dev->svlan_id, pkt_dev->svlan_p,
614 pkt_dev->svlan_cfi);
615
616 if (pkt_dev->tos)
617 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
618
619 if (pkt_dev->traffic_class)
620 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
621
622 if (pkt_dev->burst > 1)
623 seq_printf(seq, " burst: %d\n", pkt_dev->burst);
624
625 if (pkt_dev->node >= 0)
626 seq_printf(seq, " node: %d\n", pkt_dev->node);
627
628 if (pkt_dev->xmit_mode == M_NETIF_RECEIVE)
629 seq_puts(seq, " xmit_mode: netif_receive\n");
630 else if (pkt_dev->xmit_mode == M_QUEUE_XMIT)
631 seq_puts(seq, " xmit_mode: xmit_queue\n");
632
633 seq_puts(seq, " Flags: ");
634
635 if (pkt_dev->flags & F_IPV6)
636 seq_puts(seq, "IPV6 ");
637
638 if (pkt_dev->flags & F_IPSRC_RND)
639 seq_puts(seq, "IPSRC_RND ");
640
641 if (pkt_dev->flags & F_IPDST_RND)
642 seq_puts(seq, "IPDST_RND ");
643
644 if (pkt_dev->flags & F_TXSIZE_RND)
645 seq_puts(seq, "TXSIZE_RND ");
646
647 if (pkt_dev->flags & F_UDPSRC_RND)
648 seq_puts(seq, "UDPSRC_RND ");
649
650 if (pkt_dev->flags & F_UDPDST_RND)
651 seq_puts(seq, "UDPDST_RND ");
652
653 if (pkt_dev->flags & F_UDPCSUM)
654 seq_puts(seq, "UDPCSUM ");
655
656 if (pkt_dev->flags & F_NO_TIMESTAMP)
657 seq_puts(seq, "NO_TIMESTAMP ");
658
659 if (pkt_dev->flags & F_MPLS_RND)
660 seq_puts(seq, "MPLS_RND ");
661
662 if (pkt_dev->flags & F_QUEUE_MAP_RND)
663 seq_puts(seq, "QUEUE_MAP_RND ");
664
665 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
666 seq_puts(seq, "QUEUE_MAP_CPU ");
667
668 if (pkt_dev->cflows) {
669 if (pkt_dev->flags & F_FLOW_SEQ)
670 seq_puts(seq, "FLOW_SEQ "); /*in sequence flows*/
671 else
672 seq_puts(seq, "FLOW_RND ");
673 }
674
675#ifdef CONFIG_XFRM
676 if (pkt_dev->flags & F_IPSEC_ON) {
677 seq_puts(seq, "IPSEC ");
678 if (pkt_dev->spi)
679 seq_printf(seq, "spi:%u", pkt_dev->spi);
680 }
681#endif
682
683 if (pkt_dev->flags & F_MACSRC_RND)
684 seq_puts(seq, "MACSRC_RND ");
685
686 if (pkt_dev->flags & F_MACDST_RND)
687 seq_puts(seq, "MACDST_RND ");
688
689 if (pkt_dev->flags & F_VID_RND)
690 seq_puts(seq, "VID_RND ");
691
692 if (pkt_dev->flags & F_SVID_RND)
693 seq_puts(seq, "SVID_RND ");
694
695 if (pkt_dev->flags & F_NODE)
696 seq_puts(seq, "NODE_ALLOC ");
697
698 seq_puts(seq, "\n");
699
700 /* not really stopped, more like last-running-at */
701 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at;
702 idle = pkt_dev->idle_acc;
703 do_div(idle, NSEC_PER_USEC);
704
705 seq_printf(seq,
706 "Current:\n pkts-sofar: %llu errors: %llu\n",
707 (unsigned long long)pkt_dev->sofar,
708 (unsigned long long)pkt_dev->errors);
709
710 seq_printf(seq,
711 " started: %lluus stopped: %lluus idle: %lluus\n",
712 (unsigned long long) ktime_to_us(pkt_dev->started_at),
713 (unsigned long long) ktime_to_us(stopped),
714 (unsigned long long) idle);
715
716 seq_printf(seq,
717 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
718 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
719 pkt_dev->cur_src_mac_offset);
720
721 if (pkt_dev->flags & F_IPV6) {
722 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
723 &pkt_dev->cur_in6_saddr,
724 &pkt_dev->cur_in6_daddr);
725 } else
726 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n",
727 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
728
729 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
730 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
731
732 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
733
734 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
735
736 if (pkt_dev->result[0])
737 seq_printf(seq, "Result: %s\n", pkt_dev->result);
738 else
739 seq_puts(seq, "Result: Idle\n");
740
741 return 0;
742}
743
744
745static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
746 __u32 *num)
747{
748 int i = 0;
749 *num = 0;
750
751 for (; i < maxlen; i++) {
752 int value;
753 char c;
754 *num <<= 4;
755 if (get_user(c, &user_buffer[i]))
756 return -EFAULT;
757 value = hex_to_bin(c);
758 if (value >= 0)
759 *num |= value;
760 else
761 break;
762 }
763 return i;
764}
765
766static int count_trail_chars(const char __user * user_buffer,
767 unsigned int maxlen)
768{
769 int i;
770
771 for (i = 0; i < maxlen; i++) {
772 char c;
773 if (get_user(c, &user_buffer[i]))
774 return -EFAULT;
775 switch (c) {
776 case '\"':
777 case '\n':
778 case '\r':
779 case '\t':
780 case ' ':
781 case '=':
782 break;
783 default:
784 goto done;
785 }
786 }
787done:
788 return i;
789}
790
791static long num_arg(const char __user *user_buffer, unsigned long maxlen,
792 unsigned long *num)
793{
794 int i;
795 *num = 0;
796
797 for (i = 0; i < maxlen; i++) {
798 char c;
799 if (get_user(c, &user_buffer[i]))
800 return -EFAULT;
801 if ((c >= '0') && (c <= '9')) {
802 *num *= 10;
803 *num += c - '0';
804 } else
805 break;
806 }
807 return i;
808}
809
810static int strn_len(const char __user * user_buffer, unsigned int maxlen)
811{
812 int i;
813
814 for (i = 0; i < maxlen; i++) {
815 char c;
816 if (get_user(c, &user_buffer[i]))
817 return -EFAULT;
818 switch (c) {
819 case '\"':
820 case '\n':
821 case '\r':
822 case '\t':
823 case ' ':
824 goto done_str;
825 default:
826 break;
827 }
828 }
829done_str:
830 return i;
831}
832
833static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
834{
835 unsigned int n = 0;
836 char c;
837 ssize_t i = 0;
838 int len;
839
840 pkt_dev->nr_labels = 0;
841 do {
842 __u32 tmp;
843 len = hex32_arg(&buffer[i], 8, &tmp);
844 if (len <= 0)
845 return len;
846 pkt_dev->labels[n] = htonl(tmp);
847 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
848 pkt_dev->flags |= F_MPLS_RND;
849 i += len;
850 if (get_user(c, &buffer[i]))
851 return -EFAULT;
852 i++;
853 n++;
854 if (n >= MAX_MPLS_LABELS)
855 return -E2BIG;
856 } while (c == ',');
857
858 pkt_dev->nr_labels = n;
859 return i;
860}
861
862static ssize_t pktgen_if_write(struct file *file,
863 const char __user * user_buffer, size_t count,
864 loff_t * offset)
865{
866 struct seq_file *seq = file->private_data;
867 struct pktgen_dev *pkt_dev = seq->private;
868 int i, max, len;
869 char name[16], valstr[32];
870 unsigned long value = 0;
871 char *pg_result = NULL;
872 int tmp = 0;
873 char buf[128];
874
875 pg_result = &(pkt_dev->result[0]);
876
877 if (count < 1) {
878 pr_warn("wrong command format\n");
879 return -EINVAL;
880 }
881
882 max = count;
883 tmp = count_trail_chars(user_buffer, max);
884 if (tmp < 0) {
885 pr_warn("illegal format\n");
886 return tmp;
887 }
888 i = tmp;
889
890 /* Read variable name */
891
892 len = strn_len(&user_buffer[i], sizeof(name) - 1);
893 if (len < 0)
894 return len;
895
896 memset(name, 0, sizeof(name));
897 if (copy_from_user(name, &user_buffer[i], len))
898 return -EFAULT;
899 i += len;
900
901 max = count - i;
902 len = count_trail_chars(&user_buffer[i], max);
903 if (len < 0)
904 return len;
905
906 i += len;
907
908 if (debug) {
909 size_t copy = min_t(size_t, count, 1023);
910 char tb[copy + 1];
911 if (copy_from_user(tb, user_buffer, copy))
912 return -EFAULT;
913 tb[copy] = 0;
914 pr_debug("%s,%lu buffer -:%s:-\n",
915 name, (unsigned long)count, tb);
916 }
917
918 if (!strcmp(name, "min_pkt_size")) {
919 len = num_arg(&user_buffer[i], 10, &value);
920 if (len < 0)
921 return len;
922
923 i += len;
924 if (value < 14 + 20 + 8)
925 value = 14 + 20 + 8;
926 if (value != pkt_dev->min_pkt_size) {
927 pkt_dev->min_pkt_size = value;
928 pkt_dev->cur_pkt_size = value;
929 }
930 sprintf(pg_result, "OK: min_pkt_size=%u",
931 pkt_dev->min_pkt_size);
932 return count;
933 }
934
935 if (!strcmp(name, "max_pkt_size")) {
936 len = num_arg(&user_buffer[i], 10, &value);
937 if (len < 0)
938 return len;
939
940 i += len;
941 if (value < 14 + 20 + 8)
942 value = 14 + 20 + 8;
943 if (value != pkt_dev->max_pkt_size) {
944 pkt_dev->max_pkt_size = value;
945 pkt_dev->cur_pkt_size = value;
946 }
947 sprintf(pg_result, "OK: max_pkt_size=%u",
948 pkt_dev->max_pkt_size);
949 return count;
950 }
951
952 /* Shortcut for min = max */
953
954 if (!strcmp(name, "pkt_size")) {
955 len = num_arg(&user_buffer[i], 10, &value);
956 if (len < 0)
957 return len;
958
959 i += len;
960 if (value < 14 + 20 + 8)
961 value = 14 + 20 + 8;
962 if (value != pkt_dev->min_pkt_size) {
963 pkt_dev->min_pkt_size = value;
964 pkt_dev->max_pkt_size = value;
965 pkt_dev->cur_pkt_size = value;
966 }
967 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
968 return count;
969 }
970
971 if (!strcmp(name, "debug")) {
972 len = num_arg(&user_buffer[i], 10, &value);
973 if (len < 0)
974 return len;
975
976 i += len;
977 debug = value;
978 sprintf(pg_result, "OK: debug=%u", debug);
979 return count;
980 }
981
982 if (!strcmp(name, "frags")) {
983 len = num_arg(&user_buffer[i], 10, &value);
984 if (len < 0)
985 return len;
986
987 i += len;
988 pkt_dev->nfrags = value;
989 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
990 return count;
991 }
992 if (!strcmp(name, "delay")) {
993 len = num_arg(&user_buffer[i], 10, &value);
994 if (len < 0)
995 return len;
996
997 i += len;
998 if (value == 0x7FFFFFFF)
999 pkt_dev->delay = ULLONG_MAX;
1000 else
1001 pkt_dev->delay = (u64)value;
1002
1003 sprintf(pg_result, "OK: delay=%llu",
1004 (unsigned long long) pkt_dev->delay);
1005 return count;
1006 }
1007 if (!strcmp(name, "rate")) {
1008 len = num_arg(&user_buffer[i], 10, &value);
1009 if (len < 0)
1010 return len;
1011
1012 i += len;
1013 if (!value)
1014 return len;
1015 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
1016 if (debug)
1017 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1018
1019 sprintf(pg_result, "OK: rate=%lu", value);
1020 return count;
1021 }
1022 if (!strcmp(name, "ratep")) {
1023 len = num_arg(&user_buffer[i], 10, &value);
1024 if (len < 0)
1025 return len;
1026
1027 i += len;
1028 if (!value)
1029 return len;
1030 pkt_dev->delay = NSEC_PER_SEC/value;
1031 if (debug)
1032 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1033
1034 sprintf(pg_result, "OK: rate=%lu", value);
1035 return count;
1036 }
1037 if (!strcmp(name, "udp_src_min")) {
1038 len = num_arg(&user_buffer[i], 10, &value);
1039 if (len < 0)
1040 return len;
1041
1042 i += len;
1043 if (value != pkt_dev->udp_src_min) {
1044 pkt_dev->udp_src_min = value;
1045 pkt_dev->cur_udp_src = value;
1046 }
1047 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1048 return count;
1049 }
1050 if (!strcmp(name, "udp_dst_min")) {
1051 len = num_arg(&user_buffer[i], 10, &value);
1052 if (len < 0)
1053 return len;
1054
1055 i += len;
1056 if (value != pkt_dev->udp_dst_min) {
1057 pkt_dev->udp_dst_min = value;
1058 pkt_dev->cur_udp_dst = value;
1059 }
1060 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1061 return count;
1062 }
1063 if (!strcmp(name, "udp_src_max")) {
1064 len = num_arg(&user_buffer[i], 10, &value);
1065 if (len < 0)
1066 return len;
1067
1068 i += len;
1069 if (value != pkt_dev->udp_src_max) {
1070 pkt_dev->udp_src_max = value;
1071 pkt_dev->cur_udp_src = value;
1072 }
1073 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1074 return count;
1075 }
1076 if (!strcmp(name, "udp_dst_max")) {
1077 len = num_arg(&user_buffer[i], 10, &value);
1078 if (len < 0)
1079 return len;
1080
1081 i += len;
1082 if (value != pkt_dev->udp_dst_max) {
1083 pkt_dev->udp_dst_max = value;
1084 pkt_dev->cur_udp_dst = value;
1085 }
1086 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1087 return count;
1088 }
1089 if (!strcmp(name, "clone_skb")) {
1090 len = num_arg(&user_buffer[i], 10, &value);
1091 if (len < 0)
1092 return len;
1093 if ((value > 0) &&
1094 ((pkt_dev->xmit_mode == M_NETIF_RECEIVE) ||
1095 !(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1096 return -ENOTSUPP;
1097 i += len;
1098 pkt_dev->clone_skb = value;
1099
1100 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1101 return count;
1102 }
1103 if (!strcmp(name, "count")) {
1104 len = num_arg(&user_buffer[i], 10, &value);
1105 if (len < 0)
1106 return len;
1107
1108 i += len;
1109 pkt_dev->count = value;
1110 sprintf(pg_result, "OK: count=%llu",
1111 (unsigned long long)pkt_dev->count);
1112 return count;
1113 }
1114 if (!strcmp(name, "src_mac_count")) {
1115 len = num_arg(&user_buffer[i], 10, &value);
1116 if (len < 0)
1117 return len;
1118
1119 i += len;
1120 if (pkt_dev->src_mac_count != value) {
1121 pkt_dev->src_mac_count = value;
1122 pkt_dev->cur_src_mac_offset = 0;
1123 }
1124 sprintf(pg_result, "OK: src_mac_count=%d",
1125 pkt_dev->src_mac_count);
1126 return count;
1127 }
1128 if (!strcmp(name, "dst_mac_count")) {
1129 len = num_arg(&user_buffer[i], 10, &value);
1130 if (len < 0)
1131 return len;
1132
1133 i += len;
1134 if (pkt_dev->dst_mac_count != value) {
1135 pkt_dev->dst_mac_count = value;
1136 pkt_dev->cur_dst_mac_offset = 0;
1137 }
1138 sprintf(pg_result, "OK: dst_mac_count=%d",
1139 pkt_dev->dst_mac_count);
1140 return count;
1141 }
1142 if (!strcmp(name, "burst")) {
1143 len = num_arg(&user_buffer[i], 10, &value);
1144 if (len < 0)
1145 return len;
1146
1147 i += len;
1148 if ((value > 1) &&
1149 ((pkt_dev->xmit_mode == M_QUEUE_XMIT) ||
1150 ((pkt_dev->xmit_mode == M_START_XMIT) &&
1151 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))))
1152 return -ENOTSUPP;
1153 pkt_dev->burst = value < 1 ? 1 : value;
1154 sprintf(pg_result, "OK: burst=%d", pkt_dev->burst);
1155 return count;
1156 }
1157 if (!strcmp(name, "node")) {
1158 len = num_arg(&user_buffer[i], 10, &value);
1159 if (len < 0)
1160 return len;
1161
1162 i += len;
1163
1164 if (node_possible(value)) {
1165 pkt_dev->node = value;
1166 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1167 if (pkt_dev->page) {
1168 put_page(pkt_dev->page);
1169 pkt_dev->page = NULL;
1170 }
1171 }
1172 else
1173 sprintf(pg_result, "ERROR: node not possible");
1174 return count;
1175 }
1176 if (!strcmp(name, "xmit_mode")) {
1177 char f[32];
1178
1179 memset(f, 0, 32);
1180 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1181 if (len < 0)
1182 return len;
1183
1184 if (copy_from_user(f, &user_buffer[i], len))
1185 return -EFAULT;
1186 i += len;
1187
1188 if (strcmp(f, "start_xmit") == 0) {
1189 pkt_dev->xmit_mode = M_START_XMIT;
1190 } else if (strcmp(f, "netif_receive") == 0) {
1191 /* clone_skb set earlier, not supported in this mode */
1192 if (pkt_dev->clone_skb > 0)
1193 return -ENOTSUPP;
1194
1195 pkt_dev->xmit_mode = M_NETIF_RECEIVE;
1196
1197 /* make sure new packet is allocated every time
1198 * pktgen_xmit() is called
1199 */
1200 pkt_dev->last_ok = 1;
1201
1202 /* override clone_skb if user passed default value
1203 * at module loading time
1204 */
1205 pkt_dev->clone_skb = 0;
1206 } else if (strcmp(f, "queue_xmit") == 0) {
1207 pkt_dev->xmit_mode = M_QUEUE_XMIT;
1208 pkt_dev->last_ok = 1;
1209 } else {
1210 sprintf(pg_result,
1211 "xmit_mode -:%s:- unknown\nAvailable modes: %s",
1212 f, "start_xmit, netif_receive\n");
1213 return count;
1214 }
1215 sprintf(pg_result, "OK: xmit_mode=%s", f);
1216 return count;
1217 }
1218 if (!strcmp(name, "flag")) {
1219 char f[32];
1220 memset(f, 0, 32);
1221 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1222 if (len < 0)
1223 return len;
1224
1225 if (copy_from_user(f, &user_buffer[i], len))
1226 return -EFAULT;
1227 i += len;
1228 if (strcmp(f, "IPSRC_RND") == 0)
1229 pkt_dev->flags |= F_IPSRC_RND;
1230
1231 else if (strcmp(f, "!IPSRC_RND") == 0)
1232 pkt_dev->flags &= ~F_IPSRC_RND;
1233
1234 else if (strcmp(f, "TXSIZE_RND") == 0)
1235 pkt_dev->flags |= F_TXSIZE_RND;
1236
1237 else if (strcmp(f, "!TXSIZE_RND") == 0)
1238 pkt_dev->flags &= ~F_TXSIZE_RND;
1239
1240 else if (strcmp(f, "IPDST_RND") == 0)
1241 pkt_dev->flags |= F_IPDST_RND;
1242
1243 else if (strcmp(f, "!IPDST_RND") == 0)
1244 pkt_dev->flags &= ~F_IPDST_RND;
1245
1246 else if (strcmp(f, "UDPSRC_RND") == 0)
1247 pkt_dev->flags |= F_UDPSRC_RND;
1248
1249 else if (strcmp(f, "!UDPSRC_RND") == 0)
1250 pkt_dev->flags &= ~F_UDPSRC_RND;
1251
1252 else if (strcmp(f, "UDPDST_RND") == 0)
1253 pkt_dev->flags |= F_UDPDST_RND;
1254
1255 else if (strcmp(f, "!UDPDST_RND") == 0)
1256 pkt_dev->flags &= ~F_UDPDST_RND;
1257
1258 else if (strcmp(f, "MACSRC_RND") == 0)
1259 pkt_dev->flags |= F_MACSRC_RND;
1260
1261 else if (strcmp(f, "!MACSRC_RND") == 0)
1262 pkt_dev->flags &= ~F_MACSRC_RND;
1263
1264 else if (strcmp(f, "MACDST_RND") == 0)
1265 pkt_dev->flags |= F_MACDST_RND;
1266
1267 else if (strcmp(f, "!MACDST_RND") == 0)
1268 pkt_dev->flags &= ~F_MACDST_RND;
1269
1270 else if (strcmp(f, "MPLS_RND") == 0)
1271 pkt_dev->flags |= F_MPLS_RND;
1272
1273 else if (strcmp(f, "!MPLS_RND") == 0)
1274 pkt_dev->flags &= ~F_MPLS_RND;
1275
1276 else if (strcmp(f, "VID_RND") == 0)
1277 pkt_dev->flags |= F_VID_RND;
1278
1279 else if (strcmp(f, "!VID_RND") == 0)
1280 pkt_dev->flags &= ~F_VID_RND;
1281
1282 else if (strcmp(f, "SVID_RND") == 0)
1283 pkt_dev->flags |= F_SVID_RND;
1284
1285 else if (strcmp(f, "!SVID_RND") == 0)
1286 pkt_dev->flags &= ~F_SVID_RND;
1287
1288 else if (strcmp(f, "FLOW_SEQ") == 0)
1289 pkt_dev->flags |= F_FLOW_SEQ;
1290
1291 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1292 pkt_dev->flags |= F_QUEUE_MAP_RND;
1293
1294 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1295 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1296
1297 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1298 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1299
1300 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1301 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1302#ifdef CONFIG_XFRM
1303 else if (strcmp(f, "IPSEC") == 0)
1304 pkt_dev->flags |= F_IPSEC_ON;
1305#endif
1306
1307 else if (strcmp(f, "!IPV6") == 0)
1308 pkt_dev->flags &= ~F_IPV6;
1309
1310 else if (strcmp(f, "NODE_ALLOC") == 0)
1311 pkt_dev->flags |= F_NODE;
1312
1313 else if (strcmp(f, "!NODE_ALLOC") == 0)
1314 pkt_dev->flags &= ~F_NODE;
1315
1316 else if (strcmp(f, "UDPCSUM") == 0)
1317 pkt_dev->flags |= F_UDPCSUM;
1318
1319 else if (strcmp(f, "!UDPCSUM") == 0)
1320 pkt_dev->flags &= ~F_UDPCSUM;
1321
1322 else if (strcmp(f, "NO_TIMESTAMP") == 0)
1323 pkt_dev->flags |= F_NO_TIMESTAMP;
1324
1325 else if (strcmp(f, "!NO_TIMESTAMP") == 0)
1326 pkt_dev->flags &= ~F_NO_TIMESTAMP;
1327
1328 else {
1329 sprintf(pg_result,
1330 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1331 f,
1332 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1333 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, "
1334 "MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, "
1335 "QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, "
1336 "NO_TIMESTAMP, "
1337#ifdef CONFIG_XFRM
1338 "IPSEC, "
1339#endif
1340 "NODE_ALLOC\n");
1341 return count;
1342 }
1343 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1344 return count;
1345 }
1346 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1347 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1348 if (len < 0)
1349 return len;
1350
1351 if (copy_from_user(buf, &user_buffer[i], len))
1352 return -EFAULT;
1353 buf[len] = 0;
1354 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1355 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1356 strncpy(pkt_dev->dst_min, buf, len);
1357 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1358 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1359 }
1360 if (debug)
1361 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
1362 i += len;
1363 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1364 return count;
1365 }
1366 if (!strcmp(name, "dst_max")) {
1367 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1368 if (len < 0)
1369 return len;
1370
1371
1372 if (copy_from_user(buf, &user_buffer[i], len))
1373 return -EFAULT;
1374
1375 buf[len] = 0;
1376 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1377 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1378 strncpy(pkt_dev->dst_max, buf, len);
1379 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1380 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1381 }
1382 if (debug)
1383 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
1384 i += len;
1385 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1386 return count;
1387 }
1388 if (!strcmp(name, "dst6")) {
1389 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1390 if (len < 0)
1391 return len;
1392
1393 pkt_dev->flags |= F_IPV6;
1394
1395 if (copy_from_user(buf, &user_buffer[i], len))
1396 return -EFAULT;
1397 buf[len] = 0;
1398
1399 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
1400 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1401
1402 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1403
1404 if (debug)
1405 pr_debug("dst6 set to: %s\n", buf);
1406
1407 i += len;
1408 sprintf(pg_result, "OK: dst6=%s", buf);
1409 return count;
1410 }
1411 if (!strcmp(name, "dst6_min")) {
1412 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1413 if (len < 0)
1414 return len;
1415
1416 pkt_dev->flags |= F_IPV6;
1417
1418 if (copy_from_user(buf, &user_buffer[i], len))
1419 return -EFAULT;
1420 buf[len] = 0;
1421
1422 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
1423 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1424
1425 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
1426 if (debug)
1427 pr_debug("dst6_min set to: %s\n", buf);
1428
1429 i += len;
1430 sprintf(pg_result, "OK: dst6_min=%s", buf);
1431 return count;
1432 }
1433 if (!strcmp(name, "dst6_max")) {
1434 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1435 if (len < 0)
1436 return len;
1437
1438 pkt_dev->flags |= F_IPV6;
1439
1440 if (copy_from_user(buf, &user_buffer[i], len))
1441 return -EFAULT;
1442 buf[len] = 0;
1443
1444 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
1445 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1446
1447 if (debug)
1448 pr_debug("dst6_max set to: %s\n", buf);
1449
1450 i += len;
1451 sprintf(pg_result, "OK: dst6_max=%s", buf);
1452 return count;
1453 }
1454 if (!strcmp(name, "src6")) {
1455 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1456 if (len < 0)
1457 return len;
1458
1459 pkt_dev->flags |= F_IPV6;
1460
1461 if (copy_from_user(buf, &user_buffer[i], len))
1462 return -EFAULT;
1463 buf[len] = 0;
1464
1465 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
1466 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1467
1468 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1469
1470 if (debug)
1471 pr_debug("src6 set to: %s\n", buf);
1472
1473 i += len;
1474 sprintf(pg_result, "OK: src6=%s", buf);
1475 return count;
1476 }
1477 if (!strcmp(name, "src_min")) {
1478 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1479 if (len < 0)
1480 return len;
1481
1482 if (copy_from_user(buf, &user_buffer[i], len))
1483 return -EFAULT;
1484 buf[len] = 0;
1485 if (strcmp(buf, pkt_dev->src_min) != 0) {
1486 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1487 strncpy(pkt_dev->src_min, buf, len);
1488 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1489 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1490 }
1491 if (debug)
1492 pr_debug("src_min set to: %s\n", pkt_dev->src_min);
1493 i += len;
1494 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1495 return count;
1496 }
1497 if (!strcmp(name, "src_max")) {
1498 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1499 if (len < 0)
1500 return len;
1501
1502 if (copy_from_user(buf, &user_buffer[i], len))
1503 return -EFAULT;
1504 buf[len] = 0;
1505 if (strcmp(buf, pkt_dev->src_max) != 0) {
1506 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1507 strncpy(pkt_dev->src_max, buf, len);
1508 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1509 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1510 }
1511 if (debug)
1512 pr_debug("src_max set to: %s\n", pkt_dev->src_max);
1513 i += len;
1514 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1515 return count;
1516 }
1517 if (!strcmp(name, "dst_mac")) {
1518 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1519 if (len < 0)
1520 return len;
1521
1522 memset(valstr, 0, sizeof(valstr));
1523 if (copy_from_user(valstr, &user_buffer[i], len))
1524 return -EFAULT;
1525
1526 if (!mac_pton(valstr, pkt_dev->dst_mac))
1527 return -EINVAL;
1528 /* Set up Dest MAC */
1529 ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac);
1530
1531 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1532 return count;
1533 }
1534 if (!strcmp(name, "src_mac")) {
1535 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1536 if (len < 0)
1537 return len;
1538
1539 memset(valstr, 0, sizeof(valstr));
1540 if (copy_from_user(valstr, &user_buffer[i], len))
1541 return -EFAULT;
1542
1543 if (!mac_pton(valstr, pkt_dev->src_mac))
1544 return -EINVAL;
1545 /* Set up Src MAC */
1546 ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac);
1547
1548 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1549 return count;
1550 }
1551
1552 if (!strcmp(name, "clear_counters")) {
1553 pktgen_clear_counters(pkt_dev);
1554 sprintf(pg_result, "OK: Clearing counters.\n");
1555 return count;
1556 }
1557
1558 if (!strcmp(name, "flows")) {
1559 len = num_arg(&user_buffer[i], 10, &value);
1560 if (len < 0)
1561 return len;
1562
1563 i += len;
1564 if (value > MAX_CFLOWS)
1565 value = MAX_CFLOWS;
1566
1567 pkt_dev->cflows = value;
1568 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1569 return count;
1570 }
1571#ifdef CONFIG_XFRM
1572 if (!strcmp(name, "spi")) {
1573 len = num_arg(&user_buffer[i], 10, &value);
1574 if (len < 0)
1575 return len;
1576
1577 i += len;
1578 pkt_dev->spi = value;
1579 sprintf(pg_result, "OK: spi=%u", pkt_dev->spi);
1580 return count;
1581 }
1582#endif
1583 if (!strcmp(name, "flowlen")) {
1584 len = num_arg(&user_buffer[i], 10, &value);
1585 if (len < 0)
1586 return len;
1587
1588 i += len;
1589 pkt_dev->lflow = value;
1590 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1591 return count;
1592 }
1593
1594 if (!strcmp(name, "queue_map_min")) {
1595 len = num_arg(&user_buffer[i], 5, &value);
1596 if (len < 0)
1597 return len;
1598
1599 i += len;
1600 pkt_dev->queue_map_min = value;
1601 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1602 return count;
1603 }
1604
1605 if (!strcmp(name, "queue_map_max")) {
1606 len = num_arg(&user_buffer[i], 5, &value);
1607 if (len < 0)
1608 return len;
1609
1610 i += len;
1611 pkt_dev->queue_map_max = value;
1612 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1613 return count;
1614 }
1615
1616 if (!strcmp(name, "mpls")) {
1617 unsigned int n, cnt;
1618
1619 len = get_labels(&user_buffer[i], pkt_dev);
1620 if (len < 0)
1621 return len;
1622 i += len;
1623 cnt = sprintf(pg_result, "OK: mpls=");
1624 for (n = 0; n < pkt_dev->nr_labels; n++)
1625 cnt += sprintf(pg_result + cnt,
1626 "%08x%s", ntohl(pkt_dev->labels[n]),
1627 n == pkt_dev->nr_labels-1 ? "" : ",");
1628
1629 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1630 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1631 pkt_dev->svlan_id = 0xffff;
1632
1633 if (debug)
1634 pr_debug("VLAN/SVLAN auto turned off\n");
1635 }
1636 return count;
1637 }
1638
1639 if (!strcmp(name, "vlan_id")) {
1640 len = num_arg(&user_buffer[i], 4, &value);
1641 if (len < 0)
1642 return len;
1643
1644 i += len;
1645 if (value <= 4095) {
1646 pkt_dev->vlan_id = value; /* turn on VLAN */
1647
1648 if (debug)
1649 pr_debug("VLAN turned on\n");
1650
1651 if (debug && pkt_dev->nr_labels)
1652 pr_debug("MPLS auto turned off\n");
1653
1654 pkt_dev->nr_labels = 0; /* turn off MPLS */
1655 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1656 } else {
1657 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1658 pkt_dev->svlan_id = 0xffff;
1659
1660 if (debug)
1661 pr_debug("VLAN/SVLAN turned off\n");
1662 }
1663 return count;
1664 }
1665
1666 if (!strcmp(name, "vlan_p")) {
1667 len = num_arg(&user_buffer[i], 1, &value);
1668 if (len < 0)
1669 return len;
1670
1671 i += len;
1672 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1673 pkt_dev->vlan_p = value;
1674 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1675 } else {
1676 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1677 }
1678 return count;
1679 }
1680
1681 if (!strcmp(name, "vlan_cfi")) {
1682 len = num_arg(&user_buffer[i], 1, &value);
1683 if (len < 0)
1684 return len;
1685
1686 i += len;
1687 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1688 pkt_dev->vlan_cfi = value;
1689 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1690 } else {
1691 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1692 }
1693 return count;
1694 }
1695
1696 if (!strcmp(name, "svlan_id")) {
1697 len = num_arg(&user_buffer[i], 4, &value);
1698 if (len < 0)
1699 return len;
1700
1701 i += len;
1702 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1703 pkt_dev->svlan_id = value; /* turn on SVLAN */
1704
1705 if (debug)
1706 pr_debug("SVLAN turned on\n");
1707
1708 if (debug && pkt_dev->nr_labels)
1709 pr_debug("MPLS auto turned off\n");
1710
1711 pkt_dev->nr_labels = 0; /* turn off MPLS */
1712 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1713 } else {
1714 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1715 pkt_dev->svlan_id = 0xffff;
1716
1717 if (debug)
1718 pr_debug("VLAN/SVLAN turned off\n");
1719 }
1720 return count;
1721 }
1722
1723 if (!strcmp(name, "svlan_p")) {
1724 len = num_arg(&user_buffer[i], 1, &value);
1725 if (len < 0)
1726 return len;
1727
1728 i += len;
1729 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1730 pkt_dev->svlan_p = value;
1731 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1732 } else {
1733 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1734 }
1735 return count;
1736 }
1737
1738 if (!strcmp(name, "svlan_cfi")) {
1739 len = num_arg(&user_buffer[i], 1, &value);
1740 if (len < 0)
1741 return len;
1742
1743 i += len;
1744 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1745 pkt_dev->svlan_cfi = value;
1746 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1747 } else {
1748 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1749 }
1750 return count;
1751 }
1752
1753 if (!strcmp(name, "tos")) {
1754 __u32 tmp_value = 0;
1755 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1756 if (len < 0)
1757 return len;
1758
1759 i += len;
1760 if (len == 2) {
1761 pkt_dev->tos = tmp_value;
1762 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1763 } else {
1764 sprintf(pg_result, "ERROR: tos must be 00-ff");
1765 }
1766 return count;
1767 }
1768
1769 if (!strcmp(name, "traffic_class")) {
1770 __u32 tmp_value = 0;
1771 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1772 if (len < 0)
1773 return len;
1774
1775 i += len;
1776 if (len == 2) {
1777 pkt_dev->traffic_class = tmp_value;
1778 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1779 } else {
1780 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1781 }
1782 return count;
1783 }
1784
1785 if (!strcmp(name, "skb_priority")) {
1786 len = num_arg(&user_buffer[i], 9, &value);
1787 if (len < 0)
1788 return len;
1789
1790 i += len;
1791 pkt_dev->skb_priority = value;
1792 sprintf(pg_result, "OK: skb_priority=%i",
1793 pkt_dev->skb_priority);
1794 return count;
1795 }
1796
1797 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1798 return -EINVAL;
1799}
1800
1801static int pktgen_if_open(struct inode *inode, struct file *file)
1802{
1803 return single_open(file, pktgen_if_show, PDE_DATA(inode));
1804}
1805
1806static const struct file_operations pktgen_if_fops = {
1807 .owner = THIS_MODULE,
1808 .open = pktgen_if_open,
1809 .read = seq_read,
1810 .llseek = seq_lseek,
1811 .write = pktgen_if_write,
1812 .release = single_release,
1813};
1814
1815static int pktgen_thread_show(struct seq_file *seq, void *v)
1816{
1817 struct pktgen_thread *t = seq->private;
1818 const struct pktgen_dev *pkt_dev;
1819
1820 BUG_ON(!t);
1821
1822 seq_puts(seq, "Running: ");
1823
1824 rcu_read_lock();
1825 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1826 if (pkt_dev->running)
1827 seq_printf(seq, "%s ", pkt_dev->odevname);
1828
1829 seq_puts(seq, "\nStopped: ");
1830
1831 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1832 if (!pkt_dev->running)
1833 seq_printf(seq, "%s ", pkt_dev->odevname);
1834
1835 if (t->result[0])
1836 seq_printf(seq, "\nResult: %s\n", t->result);
1837 else
1838 seq_puts(seq, "\nResult: NA\n");
1839
1840 rcu_read_unlock();
1841
1842 return 0;
1843}
1844
1845static ssize_t pktgen_thread_write(struct file *file,
1846 const char __user * user_buffer,
1847 size_t count, loff_t * offset)
1848{
1849 struct seq_file *seq = file->private_data;
1850 struct pktgen_thread *t = seq->private;
1851 int i, max, len, ret;
1852 char name[40];
1853 char *pg_result;
1854
1855 if (count < 1) {
1856 // sprintf(pg_result, "Wrong command format");
1857 return -EINVAL;
1858 }
1859
1860 max = count;
1861 len = count_trail_chars(user_buffer, max);
1862 if (len < 0)
1863 return len;
1864
1865 i = len;
1866
1867 /* Read variable name */
1868
1869 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1870 if (len < 0)
1871 return len;
1872
1873 memset(name, 0, sizeof(name));
1874 if (copy_from_user(name, &user_buffer[i], len))
1875 return -EFAULT;
1876 i += len;
1877
1878 max = count - i;
1879 len = count_trail_chars(&user_buffer[i], max);
1880 if (len < 0)
1881 return len;
1882
1883 i += len;
1884
1885 if (debug)
1886 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
1887
1888 if (!t) {
1889 pr_err("ERROR: No thread\n");
1890 ret = -EINVAL;
1891 goto out;
1892 }
1893
1894 pg_result = &(t->result[0]);
1895
1896 if (!strcmp(name, "add_device")) {
1897 char f[32];
1898 memset(f, 0, 32);
1899 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1900 if (len < 0) {
1901 ret = len;
1902 goto out;
1903 }
1904 if (copy_from_user(f, &user_buffer[i], len))
1905 return -EFAULT;
1906 i += len;
1907 mutex_lock(&pktgen_thread_lock);
1908 ret = pktgen_add_device(t, f);
1909 mutex_unlock(&pktgen_thread_lock);
1910 if (!ret) {
1911 ret = count;
1912 sprintf(pg_result, "OK: add_device=%s", f);
1913 } else
1914 sprintf(pg_result, "ERROR: can not add device %s", f);
1915 goto out;
1916 }
1917
1918 if (!strcmp(name, "rem_device_all")) {
1919 mutex_lock(&pktgen_thread_lock);
1920 t->control |= T_REMDEVALL;
1921 mutex_unlock(&pktgen_thread_lock);
1922 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1923 ret = count;
1924 sprintf(pg_result, "OK: rem_device_all");
1925 goto out;
1926 }
1927
1928 if (!strcmp(name, "max_before_softirq")) {
1929 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1930 ret = count;
1931 goto out;
1932 }
1933
1934 ret = -EINVAL;
1935out:
1936 return ret;
1937}
1938
1939static int pktgen_thread_open(struct inode *inode, struct file *file)
1940{
1941 return single_open(file, pktgen_thread_show, PDE_DATA(inode));
1942}
1943
1944static const struct file_operations pktgen_thread_fops = {
1945 .owner = THIS_MODULE,
1946 .open = pktgen_thread_open,
1947 .read = seq_read,
1948 .llseek = seq_lseek,
1949 .write = pktgen_thread_write,
1950 .release = single_release,
1951};
1952
1953/* Think find or remove for NN */
1954static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn,
1955 const char *ifname, int remove)
1956{
1957 struct pktgen_thread *t;
1958 struct pktgen_dev *pkt_dev = NULL;
1959 bool exact = (remove == FIND);
1960
1961 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1962 pkt_dev = pktgen_find_dev(t, ifname, exact);
1963 if (pkt_dev) {
1964 if (remove) {
1965 pkt_dev->removal_mark = 1;
1966 t->control |= T_REMDEV;
1967 }
1968 break;
1969 }
1970 }
1971 return pkt_dev;
1972}
1973
1974/*
1975 * mark a device for removal
1976 */
1977static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname)
1978{
1979 struct pktgen_dev *pkt_dev = NULL;
1980 const int max_tries = 10, msec_per_try = 125;
1981 int i = 0;
1982
1983 mutex_lock(&pktgen_thread_lock);
1984 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1985
1986 while (1) {
1987
1988 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE);
1989 if (pkt_dev == NULL)
1990 break; /* success */
1991
1992 mutex_unlock(&pktgen_thread_lock);
1993 pr_debug("%s: waiting for %s to disappear....\n",
1994 __func__, ifname);
1995 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1996 mutex_lock(&pktgen_thread_lock);
1997
1998 if (++i >= max_tries) {
1999 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
2000 __func__, msec_per_try * i, ifname);
2001 break;
2002 }
2003
2004 }
2005
2006 mutex_unlock(&pktgen_thread_lock);
2007}
2008
2009static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev)
2010{
2011 struct pktgen_thread *t;
2012
2013 mutex_lock(&pktgen_thread_lock);
2014
2015 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
2016 struct pktgen_dev *pkt_dev;
2017
2018 if_lock(t);
2019 list_for_each_entry(pkt_dev, &t->if_list, list) {
2020 if (pkt_dev->odev != dev)
2021 continue;
2022
2023 proc_remove(pkt_dev->entry);
2024
2025 pkt_dev->entry = proc_create_data(dev->name, 0600,
2026 pn->proc_dir,
2027 &pktgen_if_fops,
2028 pkt_dev);
2029 if (!pkt_dev->entry)
2030 pr_err("can't move proc entry for '%s'\n",
2031 dev->name);
2032 break;
2033 }
2034 if_unlock(t);
2035 }
2036 mutex_unlock(&pktgen_thread_lock);
2037}
2038
2039static int pktgen_device_event(struct notifier_block *unused,
2040 unsigned long event, void *ptr)
2041{
2042 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2043 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id);
2044
2045 if (pn->pktgen_exiting)
2046 return NOTIFY_DONE;
2047
2048 /* It is OK that we do not hold the group lock right now,
2049 * as we run under the RTNL lock.
2050 */
2051
2052 switch (event) {
2053 case NETDEV_CHANGENAME:
2054 pktgen_change_name(pn, dev);
2055 break;
2056
2057 case NETDEV_UNREGISTER:
2058 pktgen_mark_device(pn, dev->name);
2059 break;
2060 }
2061
2062 return NOTIFY_DONE;
2063}
2064
2065static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn,
2066 struct pktgen_dev *pkt_dev,
2067 const char *ifname)
2068{
2069 char b[IFNAMSIZ+5];
2070 int i;
2071
2072 for (i = 0; ifname[i] != '@'; i++) {
2073 if (i == IFNAMSIZ)
2074 break;
2075
2076 b[i] = ifname[i];
2077 }
2078 b[i] = 0;
2079
2080 return dev_get_by_name(pn->net, b);
2081}
2082
2083
2084/* Associate pktgen_dev with a device. */
2085
2086static int pktgen_setup_dev(const struct pktgen_net *pn,
2087 struct pktgen_dev *pkt_dev, const char *ifname)
2088{
2089 struct net_device *odev;
2090 int err;
2091
2092 /* Clean old setups */
2093 if (pkt_dev->odev) {
2094 dev_put(pkt_dev->odev);
2095 pkt_dev->odev = NULL;
2096 }
2097
2098 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname);
2099 if (!odev) {
2100 pr_err("no such netdevice: \"%s\"\n", ifname);
2101 return -ENODEV;
2102 }
2103
2104 if (odev->type != ARPHRD_ETHER) {
2105 pr_err("not an ethernet device: \"%s\"\n", ifname);
2106 err = -EINVAL;
2107 } else if (!netif_running(odev)) {
2108 pr_err("device is down: \"%s\"\n", ifname);
2109 err = -ENETDOWN;
2110 } else {
2111 pkt_dev->odev = odev;
2112 return 0;
2113 }
2114
2115 dev_put(odev);
2116 return err;
2117}
2118
2119/* Read pkt_dev from the interface and set up internal pktgen_dev
2120 * structure to have the right information to create/send packets
2121 */
2122static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2123{
2124 int ntxq;
2125
2126 if (!pkt_dev->odev) {
2127 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2128 sprintf(pkt_dev->result,
2129 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2130 return;
2131 }
2132
2133 /* make sure that we don't pick a non-existing transmit queue */
2134 ntxq = pkt_dev->odev->real_num_tx_queues;
2135
2136 if (ntxq <= pkt_dev->queue_map_min) {
2137 pr_warn("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2138 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2139 pkt_dev->odevname);
2140 pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2141 }
2142 if (pkt_dev->queue_map_max >= ntxq) {
2143 pr_warn("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2144 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2145 pkt_dev->odevname);
2146 pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2147 }
2148
2149 /* Default to the interface's mac if not explicitly set. */
2150
2151 if (is_zero_ether_addr(pkt_dev->src_mac))
2152 ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr);
2153
2154 /* Set up Dest MAC */
2155 ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac);
2156
2157 if (pkt_dev->flags & F_IPV6) {
2158 int i, set = 0, err = 1;
2159 struct inet6_dev *idev;
2160
2161 if (pkt_dev->min_pkt_size == 0) {
2162 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
2163 + sizeof(struct udphdr)
2164 + sizeof(struct pktgen_hdr)
2165 + pkt_dev->pkt_overhead;
2166 }
2167
2168 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2169 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2170 set = 1;
2171 break;
2172 }
2173
2174 if (!set) {
2175
2176 /*
2177 * Use linklevel address if unconfigured.
2178 *
2179 * use ipv6_get_lladdr if/when it's get exported
2180 */
2181
2182 rcu_read_lock();
2183 idev = __in6_dev_get(pkt_dev->odev);
2184 if (idev) {
2185 struct inet6_ifaddr *ifp;
2186
2187 read_lock_bh(&idev->lock);
2188 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2189 if ((ifp->scope & IFA_LINK) &&
2190 !(ifp->flags & IFA_F_TENTATIVE)) {
2191 pkt_dev->cur_in6_saddr = ifp->addr;
2192 err = 0;
2193 break;
2194 }
2195 }
2196 read_unlock_bh(&idev->lock);
2197 }
2198 rcu_read_unlock();
2199 if (err)
2200 pr_err("ERROR: IPv6 link address not available\n");
2201 }
2202 } else {
2203 if (pkt_dev->min_pkt_size == 0) {
2204 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
2205 + sizeof(struct udphdr)
2206 + sizeof(struct pktgen_hdr)
2207 + pkt_dev->pkt_overhead;
2208 }
2209
2210 pkt_dev->saddr_min = 0;
2211 pkt_dev->saddr_max = 0;
2212 if (strlen(pkt_dev->src_min) == 0) {
2213
2214 struct in_device *in_dev;
2215
2216 rcu_read_lock();
2217 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2218 if (in_dev) {
2219 if (in_dev->ifa_list) {
2220 pkt_dev->saddr_min =
2221 in_dev->ifa_list->ifa_address;
2222 pkt_dev->saddr_max = pkt_dev->saddr_min;
2223 }
2224 }
2225 rcu_read_unlock();
2226 } else {
2227 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2228 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2229 }
2230
2231 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2232 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2233 }
2234 /* Initialize current values. */
2235 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2236 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
2237 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
2238
2239 pkt_dev->cur_dst_mac_offset = 0;
2240 pkt_dev->cur_src_mac_offset = 0;
2241 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2242 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2243 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2244 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2245 pkt_dev->nflows = 0;
2246}
2247
2248
2249static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2250{
2251 ktime_t start_time, end_time;
2252 s64 remaining;
2253 struct hrtimer_sleeper t;
2254
2255 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2256 hrtimer_set_expires(&t.timer, spin_until);
2257
2258 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2259 if (remaining <= 0)
2260 goto out;
2261
2262 start_time = ktime_get();
2263 if (remaining < 100000) {
2264 /* for small delays (<100us), just loop until limit is reached */
2265 do {
2266 end_time = ktime_get();
2267 } while (ktime_compare(end_time, spin_until) < 0);
2268 } else {
2269 /* see do_nanosleep */
2270 hrtimer_init_sleeper(&t, current);
2271 do {
2272 set_current_state(TASK_INTERRUPTIBLE);
2273 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2274
2275 if (likely(t.task))
2276 schedule();
2277
2278 hrtimer_cancel(&t.timer);
2279 } while (t.task && pkt_dev->running && !signal_pending(current));
2280 __set_current_state(TASK_RUNNING);
2281 end_time = ktime_get();
2282 }
2283
2284 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2285out:
2286 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2287 destroy_hrtimer_on_stack(&t.timer);
2288}
2289
2290static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2291{
2292 pkt_dev->pkt_overhead = 0;
2293 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2294 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2295 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2296}
2297
2298static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2299{
2300 return !!(pkt_dev->flows[flow].flags & F_INIT);
2301}
2302
2303static inline int f_pick(struct pktgen_dev *pkt_dev)
2304{
2305 int flow = pkt_dev->curfl;
2306
2307 if (pkt_dev->flags & F_FLOW_SEQ) {
2308 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2309 /* reset time */
2310 pkt_dev->flows[flow].count = 0;
2311 pkt_dev->flows[flow].flags = 0;
2312 pkt_dev->curfl += 1;
2313 if (pkt_dev->curfl >= pkt_dev->cflows)
2314 pkt_dev->curfl = 0; /*reset */
2315 }
2316 } else {
2317 flow = prandom_u32() % pkt_dev->cflows;
2318 pkt_dev->curfl = flow;
2319
2320 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2321 pkt_dev->flows[flow].count = 0;
2322 pkt_dev->flows[flow].flags = 0;
2323 }
2324 }
2325
2326 return pkt_dev->curfl;
2327}
2328
2329
2330#ifdef CONFIG_XFRM
2331/* If there was already an IPSEC SA, we keep it as is, else
2332 * we go look for it ...
2333*/
2334#define DUMMY_MARK 0
2335static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2336{
2337 struct xfrm_state *x = pkt_dev->flows[flow].x;
2338 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
2339 if (!x) {
2340
2341 if (pkt_dev->spi) {
2342 /* We need as quick as possible to find the right SA
2343 * Searching with minimum criteria to archieve this.
2344 */
2345 x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET);
2346 } else {
2347 /* slow path: we dont already have xfrm_state */
2348 x = xfrm_stateonly_find(pn->net, DUMMY_MARK,
2349 (xfrm_address_t *)&pkt_dev->cur_daddr,
2350 (xfrm_address_t *)&pkt_dev->cur_saddr,
2351 AF_INET,
2352 pkt_dev->ipsmode,
2353 pkt_dev->ipsproto, 0);
2354 }
2355 if (x) {
2356 pkt_dev->flows[flow].x = x;
2357 set_pkt_overhead(pkt_dev);
2358 pkt_dev->pkt_overhead += x->props.header_len;
2359 }
2360
2361 }
2362}
2363#endif
2364static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2365{
2366
2367 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2368 pkt_dev->cur_queue_map = smp_processor_id();
2369
2370 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2371 __u16 t;
2372 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2373 t = prandom_u32() %
2374 (pkt_dev->queue_map_max -
2375 pkt_dev->queue_map_min + 1)
2376 + pkt_dev->queue_map_min;
2377 } else {
2378 t = pkt_dev->cur_queue_map + 1;
2379 if (t > pkt_dev->queue_map_max)
2380 t = pkt_dev->queue_map_min;
2381 }
2382 pkt_dev->cur_queue_map = t;
2383 }
2384 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2385}
2386
2387/* Increment/randomize headers according to flags and current values
2388 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2389 */
2390static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2391{
2392 __u32 imn;
2393 __u32 imx;
2394 int flow = 0;
2395
2396 if (pkt_dev->cflows)
2397 flow = f_pick(pkt_dev);
2398
2399 /* Deal with source MAC */
2400 if (pkt_dev->src_mac_count > 1) {
2401 __u32 mc;
2402 __u32 tmp;
2403
2404 if (pkt_dev->flags & F_MACSRC_RND)
2405 mc = prandom_u32() % pkt_dev->src_mac_count;
2406 else {
2407 mc = pkt_dev->cur_src_mac_offset++;
2408 if (pkt_dev->cur_src_mac_offset >=
2409 pkt_dev->src_mac_count)
2410 pkt_dev->cur_src_mac_offset = 0;
2411 }
2412
2413 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2414 pkt_dev->hh[11] = tmp;
2415 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2416 pkt_dev->hh[10] = tmp;
2417 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2418 pkt_dev->hh[9] = tmp;
2419 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2420 pkt_dev->hh[8] = tmp;
2421 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2422 pkt_dev->hh[7] = tmp;
2423 }
2424
2425 /* Deal with Destination MAC */
2426 if (pkt_dev->dst_mac_count > 1) {
2427 __u32 mc;
2428 __u32 tmp;
2429
2430 if (pkt_dev->flags & F_MACDST_RND)
2431 mc = prandom_u32() % pkt_dev->dst_mac_count;
2432
2433 else {
2434 mc = pkt_dev->cur_dst_mac_offset++;
2435 if (pkt_dev->cur_dst_mac_offset >=
2436 pkt_dev->dst_mac_count) {
2437 pkt_dev->cur_dst_mac_offset = 0;
2438 }
2439 }
2440
2441 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2442 pkt_dev->hh[5] = tmp;
2443 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2444 pkt_dev->hh[4] = tmp;
2445 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2446 pkt_dev->hh[3] = tmp;
2447 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2448 pkt_dev->hh[2] = tmp;
2449 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2450 pkt_dev->hh[1] = tmp;
2451 }
2452
2453 if (pkt_dev->flags & F_MPLS_RND) {
2454 unsigned int i;
2455 for (i = 0; i < pkt_dev->nr_labels; i++)
2456 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2457 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2458 ((__force __be32)prandom_u32() &
2459 htonl(0x000fffff));
2460 }
2461
2462 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2463 pkt_dev->vlan_id = prandom_u32() & (4096 - 1);
2464 }
2465
2466 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2467 pkt_dev->svlan_id = prandom_u32() & (4096 - 1);
2468 }
2469
2470 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2471 if (pkt_dev->flags & F_UDPSRC_RND)
2472 pkt_dev->cur_udp_src = prandom_u32() %
2473 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2474 + pkt_dev->udp_src_min;
2475
2476 else {
2477 pkt_dev->cur_udp_src++;
2478 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2479 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2480 }
2481 }
2482
2483 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2484 if (pkt_dev->flags & F_UDPDST_RND) {
2485 pkt_dev->cur_udp_dst = prandom_u32() %
2486 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2487 + pkt_dev->udp_dst_min;
2488 } else {
2489 pkt_dev->cur_udp_dst++;
2490 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2491 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2492 }
2493 }
2494
2495 if (!(pkt_dev->flags & F_IPV6)) {
2496
2497 imn = ntohl(pkt_dev->saddr_min);
2498 imx = ntohl(pkt_dev->saddr_max);
2499 if (imn < imx) {
2500 __u32 t;
2501 if (pkt_dev->flags & F_IPSRC_RND)
2502 t = prandom_u32() % (imx - imn) + imn;
2503 else {
2504 t = ntohl(pkt_dev->cur_saddr);
2505 t++;
2506 if (t > imx)
2507 t = imn;
2508
2509 }
2510 pkt_dev->cur_saddr = htonl(t);
2511 }
2512
2513 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2514 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2515 } else {
2516 imn = ntohl(pkt_dev->daddr_min);
2517 imx = ntohl(pkt_dev->daddr_max);
2518 if (imn < imx) {
2519 __u32 t;
2520 __be32 s;
2521 if (pkt_dev->flags & F_IPDST_RND) {
2522
2523 do {
2524 t = prandom_u32() %
2525 (imx - imn) + imn;
2526 s = htonl(t);
2527 } while (ipv4_is_loopback(s) ||
2528 ipv4_is_multicast(s) ||
2529 ipv4_is_lbcast(s) ||
2530 ipv4_is_zeronet(s) ||
2531 ipv4_is_local_multicast(s));
2532 pkt_dev->cur_daddr = s;
2533 } else {
2534 t = ntohl(pkt_dev->cur_daddr);
2535 t++;
2536 if (t > imx) {
2537 t = imn;
2538 }
2539 pkt_dev->cur_daddr = htonl(t);
2540 }
2541 }
2542 if (pkt_dev->cflows) {
2543 pkt_dev->flows[flow].flags |= F_INIT;
2544 pkt_dev->flows[flow].cur_daddr =
2545 pkt_dev->cur_daddr;
2546#ifdef CONFIG_XFRM
2547 if (pkt_dev->flags & F_IPSEC_ON)
2548 get_ipsec_sa(pkt_dev, flow);
2549#endif
2550 pkt_dev->nflows++;
2551 }
2552 }
2553 } else { /* IPV6 * */
2554
2555 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
2556 int i;
2557
2558 /* Only random destinations yet */
2559
2560 for (i = 0; i < 4; i++) {
2561 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2562 (((__force __be32)prandom_u32() |
2563 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2564 pkt_dev->max_in6_daddr.s6_addr32[i]);
2565 }
2566 }
2567 }
2568
2569 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2570 __u32 t;
2571 if (pkt_dev->flags & F_TXSIZE_RND) {
2572 t = prandom_u32() %
2573 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2574 + pkt_dev->min_pkt_size;
2575 } else {
2576 t = pkt_dev->cur_pkt_size + 1;
2577 if (t > pkt_dev->max_pkt_size)
2578 t = pkt_dev->min_pkt_size;
2579 }
2580 pkt_dev->cur_pkt_size = t;
2581 }
2582
2583 set_cur_queue_map(pkt_dev);
2584
2585 pkt_dev->flows[flow].count++;
2586}
2587
2588
2589#ifdef CONFIG_XFRM
2590static u32 pktgen_dst_metrics[RTAX_MAX + 1] = {
2591
2592 [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */
2593};
2594
2595static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2596{
2597 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2598 int err = 0;
2599 struct net *net = dev_net(pkt_dev->odev);
2600
2601 if (!x)
2602 return 0;
2603 /* XXX: we dont support tunnel mode for now until
2604 * we resolve the dst issue */
2605 if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0))
2606 return 0;
2607
2608 /* But when user specify an valid SPI, transformation
2609 * supports both transport/tunnel mode + ESP/AH type.
2610 */
2611 if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0))
2612 skb->_skb_refdst = (unsigned long)&pkt_dev->dst | SKB_DST_NOREF;
2613
2614 rcu_read_lock_bh();
2615 err = x->outer_mode->output(x, skb);
2616 rcu_read_unlock_bh();
2617 if (err) {
2618 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR);
2619 goto error;
2620 }
2621 err = x->type->output(x, skb);
2622 if (err) {
2623 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR);
2624 goto error;
2625 }
2626 spin_lock_bh(&x->lock);
2627 x->curlft.bytes += skb->len;
2628 x->curlft.packets++;
2629 spin_unlock_bh(&x->lock);
2630error:
2631 return err;
2632}
2633
2634static void free_SAs(struct pktgen_dev *pkt_dev)
2635{
2636 if (pkt_dev->cflows) {
2637 /* let go of the SAs if we have them */
2638 int i;
2639 for (i = 0; i < pkt_dev->cflows; i++) {
2640 struct xfrm_state *x = pkt_dev->flows[i].x;
2641 if (x) {
2642 xfrm_state_put(x);
2643 pkt_dev->flows[i].x = NULL;
2644 }
2645 }
2646 }
2647}
2648
2649static int process_ipsec(struct pktgen_dev *pkt_dev,
2650 struct sk_buff *skb, __be16 protocol)
2651{
2652 if (pkt_dev->flags & F_IPSEC_ON) {
2653 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2654 int nhead = 0;
2655 if (x) {
2656 struct ethhdr *eth;
2657 struct iphdr *iph;
2658 int ret;
2659
2660 nhead = x->props.header_len - skb_headroom(skb);
2661 if (nhead > 0) {
2662 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2663 if (ret < 0) {
2664 pr_err("Error expanding ipsec packet %d\n",
2665 ret);
2666 goto err;
2667 }
2668 }
2669
2670 /* ipsec is not expecting ll header */
2671 skb_pull(skb, ETH_HLEN);
2672 ret = pktgen_output_ipsec(skb, pkt_dev);
2673 if (ret) {
2674 pr_err("Error creating ipsec packet %d\n", ret);
2675 goto err;
2676 }
2677 /* restore ll */
2678 eth = (struct ethhdr *)skb_push(skb, ETH_HLEN);
2679 memcpy(eth, pkt_dev->hh, 2 * ETH_ALEN);
2680 eth->h_proto = protocol;
2681
2682 /* Update IPv4 header len as well as checksum value */
2683 iph = ip_hdr(skb);
2684 iph->tot_len = htons(skb->len - ETH_HLEN);
2685 ip_send_check(iph);
2686 }
2687 }
2688 return 1;
2689err:
2690 kfree_skb(skb);
2691 return 0;
2692}
2693#endif
2694
2695static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2696{
2697 unsigned int i;
2698 for (i = 0; i < pkt_dev->nr_labels; i++)
2699 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2700
2701 mpls--;
2702 *mpls |= MPLS_STACK_BOTTOM;
2703}
2704
2705static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2706 unsigned int prio)
2707{
2708 return htons(id | (cfi << 12) | (prio << 13));
2709}
2710
2711static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2712 int datalen)
2713{
2714 struct timeval timestamp;
2715 struct pktgen_hdr *pgh;
2716
2717 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
2718 datalen -= sizeof(*pgh);
2719
2720 if (pkt_dev->nfrags <= 0) {
2721 memset(skb_put(skb, datalen), 0, datalen);
2722 } else {
2723 int frags = pkt_dev->nfrags;
2724 int i, len;
2725 int frag_len;
2726
2727
2728 if (frags > MAX_SKB_FRAGS)
2729 frags = MAX_SKB_FRAGS;
2730 len = datalen - frags * PAGE_SIZE;
2731 if (len > 0) {
2732 memset(skb_put(skb, len), 0, len);
2733 datalen = frags * PAGE_SIZE;
2734 }
2735
2736 i = 0;
2737 frag_len = (datalen/frags) < PAGE_SIZE ?
2738 (datalen/frags) : PAGE_SIZE;
2739 while (datalen > 0) {
2740 if (unlikely(!pkt_dev->page)) {
2741 int node = numa_node_id();
2742
2743 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2744 node = pkt_dev->node;
2745 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2746 if (!pkt_dev->page)
2747 break;
2748 }
2749 get_page(pkt_dev->page);
2750 skb_frag_set_page(skb, i, pkt_dev->page);
2751 skb_shinfo(skb)->frags[i].page_offset = 0;
2752 /*last fragment, fill rest of data*/
2753 if (i == (frags - 1))
2754 skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2755 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2756 else
2757 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2758 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2759 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2760 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2761 i++;
2762 skb_shinfo(skb)->nr_frags = i;
2763 }
2764 }
2765
2766 /* Stamp the time, and sequence number,
2767 * convert them to network byte order
2768 */
2769 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2770 pgh->seq_num = htonl(pkt_dev->seq_num);
2771
2772 if (pkt_dev->flags & F_NO_TIMESTAMP) {
2773 pgh->tv_sec = 0;
2774 pgh->tv_usec = 0;
2775 } else {
2776 do_gettimeofday(×tamp);
2777 pgh->tv_sec = htonl(timestamp.tv_sec);
2778 pgh->tv_usec = htonl(timestamp.tv_usec);
2779 }
2780}
2781
2782static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
2783 struct pktgen_dev *pkt_dev)
2784{
2785 unsigned int extralen = LL_RESERVED_SPACE(dev);
2786 struct sk_buff *skb = NULL;
2787 unsigned int size;
2788
2789 size = pkt_dev->cur_pkt_size + 64 + extralen + pkt_dev->pkt_overhead;
2790 if (pkt_dev->flags & F_NODE) {
2791 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id();
2792
2793 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node);
2794 if (likely(skb)) {
2795 skb_reserve(skb, NET_SKB_PAD);
2796 skb->dev = dev;
2797 }
2798 } else {
2799 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
2800 }
2801
2802 /* the caller pre-fetches from skb->data and reserves for the mac hdr */
2803 if (likely(skb))
2804 skb_reserve(skb, extralen - 16);
2805
2806 return skb;
2807}
2808
2809static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2810 struct pktgen_dev *pkt_dev)
2811{
2812 struct sk_buff *skb = NULL;
2813 __u8 *eth;
2814 struct udphdr *udph;
2815 int datalen, iplen;
2816 struct iphdr *iph;
2817 __be16 protocol = htons(ETH_P_IP);
2818 __be32 *mpls;
2819 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2820 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2821 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2822 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2823 u16 queue_map;
2824
2825 if (pkt_dev->nr_labels)
2826 protocol = htons(ETH_P_MPLS_UC);
2827
2828 if (pkt_dev->vlan_id != 0xffff)
2829 protocol = htons(ETH_P_8021Q);
2830
2831 /* Update any of the values, used when we're incrementing various
2832 * fields.
2833 */
2834 mod_cur_headers(pkt_dev);
2835 queue_map = pkt_dev->cur_queue_map;
2836
2837 skb = pktgen_alloc_skb(odev, pkt_dev);
2838 if (!skb) {
2839 sprintf(pkt_dev->result, "No memory");
2840 return NULL;
2841 }
2842
2843 prefetchw(skb->data);
2844 skb_reserve(skb, 16);
2845
2846 /* Reserve for ethernet and IP header */
2847 eth = (__u8 *) skb_push(skb, 14);
2848 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2849 if (pkt_dev->nr_labels)
2850 mpls_push(mpls, pkt_dev);
2851
2852 if (pkt_dev->vlan_id != 0xffff) {
2853 if (pkt_dev->svlan_id != 0xffff) {
2854 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2855 *svlan_tci = build_tci(pkt_dev->svlan_id,
2856 pkt_dev->svlan_cfi,
2857 pkt_dev->svlan_p);
2858 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2859 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2860 }
2861 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2862 *vlan_tci = build_tci(pkt_dev->vlan_id,
2863 pkt_dev->vlan_cfi,
2864 pkt_dev->vlan_p);
2865 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2866 *vlan_encapsulated_proto = htons(ETH_P_IP);
2867 }
2868
2869 skb_reset_mac_header(skb);
2870 skb_set_network_header(skb, skb->len);
2871 iph = (struct iphdr *) skb_put(skb, sizeof(struct iphdr));
2872
2873 skb_set_transport_header(skb, skb->len);
2874 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2875 skb_set_queue_mapping(skb, queue_map);
2876 skb->priority = pkt_dev->skb_priority;
2877
2878 memcpy(eth, pkt_dev->hh, 12);
2879 *(__be16 *) & eth[12] = protocol;
2880
2881 /* Eth + IPh + UDPh + mpls */
2882 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2883 pkt_dev->pkt_overhead;
2884 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
2885 datalen = sizeof(struct pktgen_hdr);
2886
2887 udph->source = htons(pkt_dev->cur_udp_src);
2888 udph->dest = htons(pkt_dev->cur_udp_dst);
2889 udph->len = htons(datalen + 8); /* DATA + udphdr */
2890 udph->check = 0;
2891
2892 iph->ihl = 5;
2893 iph->version = 4;
2894 iph->ttl = 32;
2895 iph->tos = pkt_dev->tos;
2896 iph->protocol = IPPROTO_UDP; /* UDP */
2897 iph->saddr = pkt_dev->cur_saddr;
2898 iph->daddr = pkt_dev->cur_daddr;
2899 iph->id = htons(pkt_dev->ip_id);
2900 pkt_dev->ip_id++;
2901 iph->frag_off = 0;
2902 iplen = 20 + 8 + datalen;
2903 iph->tot_len = htons(iplen);
2904 ip_send_check(iph);
2905 skb->protocol = protocol;
2906 skb->dev = odev;
2907 skb->pkt_type = PACKET_HOST;
2908
2909 pktgen_finalize_skb(pkt_dev, skb, datalen);
2910
2911 if (!(pkt_dev->flags & F_UDPCSUM)) {
2912 skb->ip_summed = CHECKSUM_NONE;
2913 } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IP_CSUM)) {
2914 skb->ip_summed = CHECKSUM_PARTIAL;
2915 skb->csum = 0;
2916 udp4_hwcsum(skb, iph->saddr, iph->daddr);
2917 } else {
2918 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), datalen + 8, 0);
2919
2920 /* add protocol-dependent pseudo-header */
2921 udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
2922 datalen + 8, IPPROTO_UDP, csum);
2923
2924 if (udph->check == 0)
2925 udph->check = CSUM_MANGLED_0;
2926 }
2927
2928#ifdef CONFIG_XFRM
2929 if (!process_ipsec(pkt_dev, skb, protocol))
2930 return NULL;
2931#endif
2932
2933 return skb;
2934}
2935
2936static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2937 struct pktgen_dev *pkt_dev)
2938{
2939 struct sk_buff *skb = NULL;
2940 __u8 *eth;
2941 struct udphdr *udph;
2942 int datalen, udplen;
2943 struct ipv6hdr *iph;
2944 __be16 protocol = htons(ETH_P_IPV6);
2945 __be32 *mpls;
2946 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2947 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2948 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2949 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2950 u16 queue_map;
2951
2952 if (pkt_dev->nr_labels)
2953 protocol = htons(ETH_P_MPLS_UC);
2954
2955 if (pkt_dev->vlan_id != 0xffff)
2956 protocol = htons(ETH_P_8021Q);
2957
2958 /* Update any of the values, used when we're incrementing various
2959 * fields.
2960 */
2961 mod_cur_headers(pkt_dev);
2962 queue_map = pkt_dev->cur_queue_map;
2963
2964 skb = pktgen_alloc_skb(odev, pkt_dev);
2965 if (!skb) {
2966 sprintf(pkt_dev->result, "No memory");
2967 return NULL;
2968 }
2969
2970 prefetchw(skb->data);
2971 skb_reserve(skb, 16);
2972
2973 /* Reserve for ethernet and IP header */
2974 eth = (__u8 *) skb_push(skb, 14);
2975 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2976 if (pkt_dev->nr_labels)
2977 mpls_push(mpls, pkt_dev);
2978
2979 if (pkt_dev->vlan_id != 0xffff) {
2980 if (pkt_dev->svlan_id != 0xffff) {
2981 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2982 *svlan_tci = build_tci(pkt_dev->svlan_id,
2983 pkt_dev->svlan_cfi,
2984 pkt_dev->svlan_p);
2985 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2986 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2987 }
2988 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2989 *vlan_tci = build_tci(pkt_dev->vlan_id,
2990 pkt_dev->vlan_cfi,
2991 pkt_dev->vlan_p);
2992 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2993 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2994 }
2995
2996 skb_reset_mac_header(skb);
2997 skb_set_network_header(skb, skb->len);
2998 iph = (struct ipv6hdr *) skb_put(skb, sizeof(struct ipv6hdr));
2999
3000 skb_set_transport_header(skb, skb->len);
3001 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
3002 skb_set_queue_mapping(skb, queue_map);
3003 skb->priority = pkt_dev->skb_priority;
3004
3005 memcpy(eth, pkt_dev->hh, 12);
3006 *(__be16 *) ð[12] = protocol;
3007
3008 /* Eth + IPh + UDPh + mpls */
3009 datalen = pkt_dev->cur_pkt_size - 14 -
3010 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
3011 pkt_dev->pkt_overhead;
3012
3013 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
3014 datalen = sizeof(struct pktgen_hdr);
3015 net_info_ratelimited("increased datalen to %d\n", datalen);
3016 }
3017
3018 udplen = datalen + sizeof(struct udphdr);
3019 udph->source = htons(pkt_dev->cur_udp_src);
3020 udph->dest = htons(pkt_dev->cur_udp_dst);
3021 udph->len = htons(udplen);
3022 udph->check = 0;
3023
3024 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
3025
3026 if (pkt_dev->traffic_class) {
3027 /* Version + traffic class + flow (0) */
3028 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
3029 }
3030
3031 iph->hop_limit = 32;
3032
3033 iph->payload_len = htons(udplen);
3034 iph->nexthdr = IPPROTO_UDP;
3035
3036 iph->daddr = pkt_dev->cur_in6_daddr;
3037 iph->saddr = pkt_dev->cur_in6_saddr;
3038
3039 skb->protocol = protocol;
3040 skb->dev = odev;
3041 skb->pkt_type = PACKET_HOST;
3042
3043 pktgen_finalize_skb(pkt_dev, skb, datalen);
3044
3045 if (!(pkt_dev->flags & F_UDPCSUM)) {
3046 skb->ip_summed = CHECKSUM_NONE;
3047 } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IPV6_CSUM)) {
3048 skb->ip_summed = CHECKSUM_PARTIAL;
3049 skb->csum_start = skb_transport_header(skb) - skb->head;
3050 skb->csum_offset = offsetof(struct udphdr, check);
3051 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0);
3052 } else {
3053 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), udplen, 0);
3054
3055 /* add protocol-dependent pseudo-header */
3056 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum);
3057
3058 if (udph->check == 0)
3059 udph->check = CSUM_MANGLED_0;
3060 }
3061
3062 return skb;
3063}
3064
3065static struct sk_buff *fill_packet(struct net_device *odev,
3066 struct pktgen_dev *pkt_dev)
3067{
3068 if (pkt_dev->flags & F_IPV6)
3069 return fill_packet_ipv6(odev, pkt_dev);
3070 else
3071 return fill_packet_ipv4(odev, pkt_dev);
3072}
3073
3074static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3075{
3076 pkt_dev->seq_num = 1;
3077 pkt_dev->idle_acc = 0;
3078 pkt_dev->sofar = 0;
3079 pkt_dev->tx_bytes = 0;
3080 pkt_dev->errors = 0;
3081}
3082
3083/* Set up structure for sending pkts, clear counters */
3084
3085static void pktgen_run(struct pktgen_thread *t)
3086{
3087 struct pktgen_dev *pkt_dev;
3088 int started = 0;
3089
3090 func_enter();
3091
3092 rcu_read_lock();
3093 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3094
3095 /*
3096 * setup odev and create initial packet.
3097 */
3098 pktgen_setup_inject(pkt_dev);
3099
3100 if (pkt_dev->odev) {
3101 pktgen_clear_counters(pkt_dev);
3102 pkt_dev->skb = NULL;
3103 pkt_dev->started_at = pkt_dev->next_tx = ktime_get();
3104
3105 set_pkt_overhead(pkt_dev);
3106
3107 strcpy(pkt_dev->result, "Starting");
3108 pkt_dev->running = 1; /* Cranke yeself! */
3109 started++;
3110 } else
3111 strcpy(pkt_dev->result, "Error starting");
3112 }
3113 rcu_read_unlock();
3114 if (started)
3115 t->control &= ~(T_STOP);
3116}
3117
3118static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn)
3119{
3120 struct pktgen_thread *t;
3121
3122 func_enter();
3123
3124 mutex_lock(&pktgen_thread_lock);
3125
3126 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3127 t->control |= T_STOP;
3128
3129 mutex_unlock(&pktgen_thread_lock);
3130}
3131
3132static int thread_is_running(const struct pktgen_thread *t)
3133{
3134 const struct pktgen_dev *pkt_dev;
3135
3136 rcu_read_lock();
3137 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
3138 if (pkt_dev->running) {
3139 rcu_read_unlock();
3140 return 1;
3141 }
3142 rcu_read_unlock();
3143 return 0;
3144}
3145
3146static int pktgen_wait_thread_run(struct pktgen_thread *t)
3147{
3148 while (thread_is_running(t)) {
3149
3150 msleep_interruptible(100);
3151
3152 if (signal_pending(current))
3153 goto signal;
3154 }
3155 return 1;
3156signal:
3157 return 0;
3158}
3159
3160static int pktgen_wait_all_threads_run(struct pktgen_net *pn)
3161{
3162 struct pktgen_thread *t;
3163 int sig = 1;
3164
3165 mutex_lock(&pktgen_thread_lock);
3166
3167 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
3168 sig = pktgen_wait_thread_run(t);
3169 if (sig == 0)
3170 break;
3171 }
3172
3173 if (sig == 0)
3174 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3175 t->control |= (T_STOP);
3176
3177 mutex_unlock(&pktgen_thread_lock);
3178 return sig;
3179}
3180
3181static void pktgen_run_all_threads(struct pktgen_net *pn)
3182{
3183 struct pktgen_thread *t;
3184
3185 func_enter();
3186
3187 mutex_lock(&pktgen_thread_lock);
3188
3189 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3190 t->control |= (T_RUN);
3191
3192 mutex_unlock(&pktgen_thread_lock);
3193
3194 /* Propagate thread->control */
3195 schedule_timeout_interruptible(msecs_to_jiffies(125));
3196
3197 pktgen_wait_all_threads_run(pn);
3198}
3199
3200static void pktgen_reset_all_threads(struct pktgen_net *pn)
3201{
3202 struct pktgen_thread *t;
3203
3204 func_enter();
3205
3206 mutex_lock(&pktgen_thread_lock);
3207
3208 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3209 t->control |= (T_REMDEVALL);
3210
3211 mutex_unlock(&pktgen_thread_lock);
3212
3213 /* Propagate thread->control */
3214 schedule_timeout_interruptible(msecs_to_jiffies(125));
3215
3216 pktgen_wait_all_threads_run(pn);
3217}
3218
3219static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3220{
3221 __u64 bps, mbps, pps;
3222 char *p = pkt_dev->result;
3223 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3224 pkt_dev->started_at);
3225 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3226
3227 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3228 (unsigned long long)ktime_to_us(elapsed),
3229 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3230 (unsigned long long)ktime_to_us(idle),
3231 (unsigned long long)pkt_dev->sofar,
3232 pkt_dev->cur_pkt_size, nr_frags);
3233
3234 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3235 ktime_to_ns(elapsed));
3236
3237 bps = pps * 8 * pkt_dev->cur_pkt_size;
3238
3239 mbps = bps;
3240 do_div(mbps, 1000000);
3241 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3242 (unsigned long long)pps,
3243 (unsigned long long)mbps,
3244 (unsigned long long)bps,
3245 (unsigned long long)pkt_dev->errors);
3246}
3247
3248/* Set stopped-at timer, remove from running list, do counters & statistics */
3249static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3250{
3251 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3252
3253 if (!pkt_dev->running) {
3254 pr_warn("interface: %s is already stopped\n",
3255 pkt_dev->odevname);
3256 return -EINVAL;
3257 }
3258
3259 pkt_dev->running = 0;
3260 kfree_skb(pkt_dev->skb);
3261 pkt_dev->skb = NULL;
3262 pkt_dev->stopped_at = ktime_get();
3263
3264 show_results(pkt_dev, nr_frags);
3265
3266 return 0;
3267}
3268
3269static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3270{
3271 struct pktgen_dev *pkt_dev, *best = NULL;
3272
3273 rcu_read_lock();
3274 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3275 if (!pkt_dev->running)
3276 continue;
3277 if (best == NULL)
3278 best = pkt_dev;
3279 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0)
3280 best = pkt_dev;
3281 }
3282 rcu_read_unlock();
3283
3284 return best;
3285}
3286
3287static void pktgen_stop(struct pktgen_thread *t)
3288{
3289 struct pktgen_dev *pkt_dev;
3290
3291 func_enter();
3292
3293 rcu_read_lock();
3294
3295 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3296 pktgen_stop_device(pkt_dev);
3297 }
3298
3299 rcu_read_unlock();
3300}
3301
3302/*
3303 * one of our devices needs to be removed - find it
3304 * and remove it
3305 */
3306static void pktgen_rem_one_if(struct pktgen_thread *t)
3307{
3308 struct list_head *q, *n;
3309 struct pktgen_dev *cur;
3310
3311 func_enter();
3312
3313 list_for_each_safe(q, n, &t->if_list) {
3314 cur = list_entry(q, struct pktgen_dev, list);
3315
3316 if (!cur->removal_mark)
3317 continue;
3318
3319 kfree_skb(cur->skb);
3320 cur->skb = NULL;
3321
3322 pktgen_remove_device(t, cur);
3323
3324 break;
3325 }
3326}
3327
3328static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3329{
3330 struct list_head *q, *n;
3331 struct pktgen_dev *cur;
3332
3333 func_enter();
3334
3335 /* Remove all devices, free mem */
3336
3337 list_for_each_safe(q, n, &t->if_list) {
3338 cur = list_entry(q, struct pktgen_dev, list);
3339
3340 kfree_skb(cur->skb);
3341 cur->skb = NULL;
3342
3343 pktgen_remove_device(t, cur);
3344 }
3345}
3346
3347static void pktgen_rem_thread(struct pktgen_thread *t)
3348{
3349 /* Remove from the thread list */
3350 remove_proc_entry(t->tsk->comm, t->net->proc_dir);
3351}
3352
3353static void pktgen_resched(struct pktgen_dev *pkt_dev)
3354{
3355 ktime_t idle_start = ktime_get();
3356 schedule();
3357 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3358}
3359
3360static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3361{
3362 ktime_t idle_start = ktime_get();
3363
3364 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3365 if (signal_pending(current))
3366 break;
3367
3368 if (need_resched())
3369 pktgen_resched(pkt_dev);
3370 else
3371 cpu_relax();
3372 }
3373 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3374}
3375
3376static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3377{
3378 unsigned int burst = ACCESS_ONCE(pkt_dev->burst);
3379 struct net_device *odev = pkt_dev->odev;
3380 struct netdev_queue *txq;
3381 struct sk_buff *skb;
3382 int ret;
3383
3384 /* If device is offline, then don't send */
3385 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3386 pktgen_stop_device(pkt_dev);
3387 return;
3388 }
3389
3390 /* This is max DELAY, this has special meaning of
3391 * "never transmit"
3392 */
3393 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3394 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
3395 return;
3396 }
3397
3398 /* If no skb or clone count exhausted then get new one */
3399 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3400 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3401 /* build a new pkt */
3402 kfree_skb(pkt_dev->skb);
3403
3404 pkt_dev->skb = fill_packet(odev, pkt_dev);
3405 if (pkt_dev->skb == NULL) {
3406 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3407 schedule();
3408 pkt_dev->clone_count--; /* back out increment, OOM */
3409 return;
3410 }
3411 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3412 pkt_dev->clone_count = 0; /* reset counter */
3413 }
3414
3415 if (pkt_dev->delay && pkt_dev->last_ok)
3416 spin(pkt_dev, pkt_dev->next_tx);
3417
3418 if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) {
3419 skb = pkt_dev->skb;
3420 skb->protocol = eth_type_trans(skb, skb->dev);
3421 atomic_add(burst, &skb->users);
3422 local_bh_disable();
3423 do {
3424 ret = netif_receive_skb(skb);
3425 if (ret == NET_RX_DROP)
3426 pkt_dev->errors++;
3427 pkt_dev->sofar++;
3428 pkt_dev->seq_num++;
3429 if (atomic_read(&skb->users) != burst) {
3430 /* skb was queued by rps/rfs or taps,
3431 * so cannot reuse this skb
3432 */
3433 atomic_sub(burst - 1, &skb->users);
3434 /* get out of the loop and wait
3435 * until skb is consumed
3436 */
3437 break;
3438 }
3439 /* skb was 'freed' by stack, so clean few
3440 * bits and reuse it
3441 */
3442#ifdef CONFIG_NET_CLS_ACT
3443 skb->tc_verd = 0; /* reset reclass/redir ttl */
3444#endif
3445 } while (--burst > 0);
3446 goto out; /* Skips xmit_mode M_START_XMIT */
3447 } else if (pkt_dev->xmit_mode == M_QUEUE_XMIT) {
3448 local_bh_disable();
3449 atomic_inc(&pkt_dev->skb->users);
3450
3451 ret = dev_queue_xmit(pkt_dev->skb);
3452 switch (ret) {
3453 case NET_XMIT_SUCCESS:
3454 pkt_dev->sofar++;
3455 pkt_dev->seq_num++;
3456 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3457 break;
3458 case NET_XMIT_DROP:
3459 case NET_XMIT_CN:
3460 /* These are all valid return codes for a qdisc but
3461 * indicate packets are being dropped or will likely
3462 * be dropped soon.
3463 */
3464 case NETDEV_TX_BUSY:
3465 /* qdisc may call dev_hard_start_xmit directly in cases
3466 * where no queues exist e.g. loopback device, virtual
3467 * devices, etc. In this case we need to handle
3468 * NETDEV_TX_ codes.
3469 */
3470 default:
3471 pkt_dev->errors++;
3472 net_info_ratelimited("%s xmit error: %d\n",
3473 pkt_dev->odevname, ret);
3474 break;
3475 }
3476 goto out;
3477 }
3478
3479 txq = skb_get_tx_queue(odev, pkt_dev->skb);
3480
3481 local_bh_disable();
3482
3483 HARD_TX_LOCK(odev, txq, smp_processor_id());
3484
3485 if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) {
3486 ret = NETDEV_TX_BUSY;
3487 pkt_dev->last_ok = 0;
3488 goto unlock;
3489 }
3490 atomic_add(burst, &pkt_dev->skb->users);
3491
3492xmit_more:
3493 ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0);
3494
3495 switch (ret) {
3496 case NETDEV_TX_OK:
3497 pkt_dev->last_ok = 1;
3498 pkt_dev->sofar++;
3499 pkt_dev->seq_num++;
3500 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3501 if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq))
3502 goto xmit_more;
3503 break;
3504 case NET_XMIT_DROP:
3505 case NET_XMIT_CN:
3506 /* skb has been consumed */
3507 pkt_dev->errors++;
3508 break;
3509 default: /* Drivers are not supposed to return other values! */
3510 net_info_ratelimited("%s xmit error: %d\n",
3511 pkt_dev->odevname, ret);
3512 pkt_dev->errors++;
3513 /* fallthru */
3514 case NETDEV_TX_BUSY:
3515 /* Retry it next time */
3516 atomic_dec(&(pkt_dev->skb->users));
3517 pkt_dev->last_ok = 0;
3518 }
3519 if (unlikely(burst))
3520 atomic_sub(burst, &pkt_dev->skb->users);
3521unlock:
3522 HARD_TX_UNLOCK(odev, txq);
3523
3524out:
3525 local_bh_enable();
3526
3527 /* If pkt_dev->count is zero, then run forever */
3528 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3529 pktgen_wait_for_skb(pkt_dev);
3530
3531 /* Done with this */
3532 pktgen_stop_device(pkt_dev);
3533 }
3534}
3535
3536/*
3537 * Main loop of the thread goes here
3538 */
3539
3540static int pktgen_thread_worker(void *arg)
3541{
3542 DEFINE_WAIT(wait);
3543 struct pktgen_thread *t = arg;
3544 struct pktgen_dev *pkt_dev = NULL;
3545 int cpu = t->cpu;
3546
3547 BUG_ON(smp_processor_id() != cpu);
3548
3549 init_waitqueue_head(&t->queue);
3550 complete(&t->start_done);
3551
3552 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3553
3554 set_freezable();
3555
3556 while (!kthread_should_stop()) {
3557 pkt_dev = next_to_run(t);
3558
3559 if (unlikely(!pkt_dev && t->control == 0)) {
3560 if (t->net->pktgen_exiting)
3561 break;
3562 wait_event_interruptible_timeout(t->queue,
3563 t->control != 0,
3564 HZ/10);
3565 try_to_freeze();
3566 continue;
3567 }
3568
3569 if (likely(pkt_dev)) {
3570 pktgen_xmit(pkt_dev);
3571
3572 if (need_resched())
3573 pktgen_resched(pkt_dev);
3574 else
3575 cpu_relax();
3576 }
3577
3578 if (t->control & T_STOP) {
3579 pktgen_stop(t);
3580 t->control &= ~(T_STOP);
3581 }
3582
3583 if (t->control & T_RUN) {
3584 pktgen_run(t);
3585 t->control &= ~(T_RUN);
3586 }
3587
3588 if (t->control & T_REMDEVALL) {
3589 pktgen_rem_all_ifs(t);
3590 t->control &= ~(T_REMDEVALL);
3591 }
3592
3593 if (t->control & T_REMDEV) {
3594 pktgen_rem_one_if(t);
3595 t->control &= ~(T_REMDEV);
3596 }
3597
3598 try_to_freeze();
3599 }
3600
3601 pr_debug("%s stopping all device\n", t->tsk->comm);
3602 pktgen_stop(t);
3603
3604 pr_debug("%s removing all device\n", t->tsk->comm);
3605 pktgen_rem_all_ifs(t);
3606
3607 pr_debug("%s removing thread\n", t->tsk->comm);
3608 pktgen_rem_thread(t);
3609
3610 return 0;
3611}
3612
3613static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3614 const char *ifname, bool exact)
3615{
3616 struct pktgen_dev *p, *pkt_dev = NULL;
3617 size_t len = strlen(ifname);
3618
3619 rcu_read_lock();
3620 list_for_each_entry_rcu(p, &t->if_list, list)
3621 if (strncmp(p->odevname, ifname, len) == 0) {
3622 if (p->odevname[len]) {
3623 if (exact || p->odevname[len] != '@')
3624 continue;
3625 }
3626 pkt_dev = p;
3627 break;
3628 }
3629
3630 rcu_read_unlock();
3631 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3632 return pkt_dev;
3633}
3634
3635/*
3636 * Adds a dev at front of if_list.
3637 */
3638
3639static int add_dev_to_thread(struct pktgen_thread *t,
3640 struct pktgen_dev *pkt_dev)
3641{
3642 int rv = 0;
3643
3644 /* This function cannot be called concurrently, as its called
3645 * under pktgen_thread_lock mutex, but it can run from
3646 * userspace on another CPU than the kthread. The if_lock()
3647 * is used here to sync with concurrent instances of
3648 * _rem_dev_from_if_list() invoked via kthread, which is also
3649 * updating the if_list */
3650 if_lock(t);
3651
3652 if (pkt_dev->pg_thread) {
3653 pr_err("ERROR: already assigned to a thread\n");
3654 rv = -EBUSY;
3655 goto out;
3656 }
3657
3658 pkt_dev->running = 0;
3659 pkt_dev->pg_thread = t;
3660 list_add_rcu(&pkt_dev->list, &t->if_list);
3661
3662out:
3663 if_unlock(t);
3664 return rv;
3665}
3666
3667/* Called under thread lock */
3668
3669static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3670{
3671 struct pktgen_dev *pkt_dev;
3672 int err;
3673 int node = cpu_to_node(t->cpu);
3674
3675 /* We don't allow a device to be on several threads */
3676
3677 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND);
3678 if (pkt_dev) {
3679 pr_err("ERROR: interface already used\n");
3680 return -EBUSY;
3681 }
3682
3683 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3684 if (!pkt_dev)
3685 return -ENOMEM;
3686
3687 strcpy(pkt_dev->odevname, ifname);
3688 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3689 node);
3690 if (pkt_dev->flows == NULL) {
3691 kfree(pkt_dev);
3692 return -ENOMEM;
3693 }
3694
3695 pkt_dev->removal_mark = 0;
3696 pkt_dev->nfrags = 0;
3697 pkt_dev->delay = pg_delay_d;
3698 pkt_dev->count = pg_count_d;
3699 pkt_dev->sofar = 0;
3700 pkt_dev->udp_src_min = 9; /* sink port */
3701 pkt_dev->udp_src_max = 9;
3702 pkt_dev->udp_dst_min = 9;
3703 pkt_dev->udp_dst_max = 9;
3704 pkt_dev->vlan_p = 0;
3705 pkt_dev->vlan_cfi = 0;
3706 pkt_dev->vlan_id = 0xffff;
3707 pkt_dev->svlan_p = 0;
3708 pkt_dev->svlan_cfi = 0;
3709 pkt_dev->svlan_id = 0xffff;
3710 pkt_dev->burst = 1;
3711 pkt_dev->node = -1;
3712
3713 err = pktgen_setup_dev(t->net, pkt_dev, ifname);
3714 if (err)
3715 goto out1;
3716 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3717 pkt_dev->clone_skb = pg_clone_skb_d;
3718
3719 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir,
3720 &pktgen_if_fops, pkt_dev);
3721 if (!pkt_dev->entry) {
3722 pr_err("cannot create %s/%s procfs entry\n",
3723 PG_PROC_DIR, ifname);
3724 err = -EINVAL;
3725 goto out2;
3726 }
3727#ifdef CONFIG_XFRM
3728 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3729 pkt_dev->ipsproto = IPPROTO_ESP;
3730
3731 /* xfrm tunnel mode needs additional dst to extract outter
3732 * ip header protocol/ttl/id field, here creat a phony one.
3733 * instead of looking for a valid rt, which definitely hurting
3734 * performance under such circumstance.
3735 */
3736 pkt_dev->dstops.family = AF_INET;
3737 pkt_dev->dst.dev = pkt_dev->odev;
3738 dst_init_metrics(&pkt_dev->dst, pktgen_dst_metrics, false);
3739 pkt_dev->dst.child = &pkt_dev->dst;
3740 pkt_dev->dst.ops = &pkt_dev->dstops;
3741#endif
3742
3743 return add_dev_to_thread(t, pkt_dev);
3744out2:
3745 dev_put(pkt_dev->odev);
3746out1:
3747#ifdef CONFIG_XFRM
3748 free_SAs(pkt_dev);
3749#endif
3750 vfree(pkt_dev->flows);
3751 kfree(pkt_dev);
3752 return err;
3753}
3754
3755static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
3756{
3757 struct pktgen_thread *t;
3758 struct proc_dir_entry *pe;
3759 struct task_struct *p;
3760
3761 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3762 cpu_to_node(cpu));
3763 if (!t) {
3764 pr_err("ERROR: out of memory, can't create new thread\n");
3765 return -ENOMEM;
3766 }
3767
3768 mutex_init(&t->if_lock);
3769 t->cpu = cpu;
3770
3771 INIT_LIST_HEAD(&t->if_list);
3772
3773 list_add_tail(&t->th_list, &pn->pktgen_threads);
3774 init_completion(&t->start_done);
3775
3776 p = kthread_create_on_node(pktgen_thread_worker,
3777 t,
3778 cpu_to_node(cpu),
3779 "kpktgend_%d", cpu);
3780 if (IS_ERR(p)) {
3781 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3782 list_del(&t->th_list);
3783 kfree(t);
3784 return PTR_ERR(p);
3785 }
3786 kthread_bind(p, cpu);
3787 t->tsk = p;
3788
3789 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
3790 &pktgen_thread_fops, t);
3791 if (!pe) {
3792 pr_err("cannot create %s/%s procfs entry\n",
3793 PG_PROC_DIR, t->tsk->comm);
3794 kthread_stop(p);
3795 list_del(&t->th_list);
3796 kfree(t);
3797 return -EINVAL;
3798 }
3799
3800 t->net = pn;
3801 get_task_struct(p);
3802 wake_up_process(p);
3803 wait_for_completion(&t->start_done);
3804
3805 return 0;
3806}
3807
3808/*
3809 * Removes a device from the thread if_list.
3810 */
3811static void _rem_dev_from_if_list(struct pktgen_thread *t,
3812 struct pktgen_dev *pkt_dev)
3813{
3814 struct list_head *q, *n;
3815 struct pktgen_dev *p;
3816
3817 if_lock(t);
3818 list_for_each_safe(q, n, &t->if_list) {
3819 p = list_entry(q, struct pktgen_dev, list);
3820 if (p == pkt_dev)
3821 list_del_rcu(&p->list);
3822 }
3823 if_unlock(t);
3824}
3825
3826static int pktgen_remove_device(struct pktgen_thread *t,
3827 struct pktgen_dev *pkt_dev)
3828{
3829 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3830
3831 if (pkt_dev->running) {
3832 pr_warn("WARNING: trying to remove a running interface, stopping it now\n");
3833 pktgen_stop_device(pkt_dev);
3834 }
3835
3836 /* Dis-associate from the interface */
3837
3838 if (pkt_dev->odev) {
3839 dev_put(pkt_dev->odev);
3840 pkt_dev->odev = NULL;
3841 }
3842
3843 /* Remove proc before if_list entry, because add_device uses
3844 * list to determine if interface already exist, avoid race
3845 * with proc_create_data() */
3846 proc_remove(pkt_dev->entry);
3847
3848 /* And update the thread if_list */
3849 _rem_dev_from_if_list(t, pkt_dev);
3850
3851#ifdef CONFIG_XFRM
3852 free_SAs(pkt_dev);
3853#endif
3854 vfree(pkt_dev->flows);
3855 if (pkt_dev->page)
3856 put_page(pkt_dev->page);
3857 kfree_rcu(pkt_dev, rcu);
3858 return 0;
3859}
3860
3861static int __net_init pg_net_init(struct net *net)
3862{
3863 struct pktgen_net *pn = net_generic(net, pg_net_id);
3864 struct proc_dir_entry *pe;
3865 int cpu, ret = 0;
3866
3867 pn->net = net;
3868 INIT_LIST_HEAD(&pn->pktgen_threads);
3869 pn->pktgen_exiting = false;
3870 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net);
3871 if (!pn->proc_dir) {
3872 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR);
3873 return -ENODEV;
3874 }
3875 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops);
3876 if (pe == NULL) {
3877 pr_err("cannot create %s procfs entry\n", PGCTRL);
3878 ret = -EINVAL;
3879 goto remove;
3880 }
3881
3882 for_each_online_cpu(cpu) {
3883 int err;
3884
3885 err = pktgen_create_thread(cpu, pn);
3886 if (err)
3887 pr_warn("Cannot create thread for cpu %d (%d)\n",
3888 cpu, err);
3889 }
3890
3891 if (list_empty(&pn->pktgen_threads)) {
3892 pr_err("Initialization failed for all threads\n");
3893 ret = -ENODEV;
3894 goto remove_entry;
3895 }
3896
3897 return 0;
3898
3899remove_entry:
3900 remove_proc_entry(PGCTRL, pn->proc_dir);
3901remove:
3902 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3903 return ret;
3904}
3905
3906static void __net_exit pg_net_exit(struct net *net)
3907{
3908 struct pktgen_net *pn = net_generic(net, pg_net_id);
3909 struct pktgen_thread *t;
3910 struct list_head *q, *n;
3911 LIST_HEAD(list);
3912
3913 /* Stop all interfaces & threads */
3914 pn->pktgen_exiting = true;
3915
3916 mutex_lock(&pktgen_thread_lock);
3917 list_splice_init(&pn->pktgen_threads, &list);
3918 mutex_unlock(&pktgen_thread_lock);
3919
3920 list_for_each_safe(q, n, &list) {
3921 t = list_entry(q, struct pktgen_thread, th_list);
3922 list_del(&t->th_list);
3923 kthread_stop(t->tsk);
3924 put_task_struct(t->tsk);
3925 kfree(t);
3926 }
3927
3928 remove_proc_entry(PGCTRL, pn->proc_dir);
3929 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3930}
3931
3932static struct pernet_operations pg_net_ops = {
3933 .init = pg_net_init,
3934 .exit = pg_net_exit,
3935 .id = &pg_net_id,
3936 .size = sizeof(struct pktgen_net),
3937};
3938
3939static int __init pg_init(void)
3940{
3941 int ret = 0;
3942
3943 pr_info("%s", version);
3944 ret = register_pernet_subsys(&pg_net_ops);
3945 if (ret)
3946 return ret;
3947 ret = register_netdevice_notifier(&pktgen_notifier_block);
3948 if (ret)
3949 unregister_pernet_subsys(&pg_net_ops);
3950
3951 return ret;
3952}
3953
3954static void __exit pg_cleanup(void)
3955{
3956 unregister_netdevice_notifier(&pktgen_notifier_block);
3957 unregister_pernet_subsys(&pg_net_ops);
3958 /* Don't need rcu_barrier() due to use of kfree_rcu() */
3959}
3960
3961module_init(pg_init);
3962module_exit(pg_cleanup);
3963
3964MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3965MODULE_DESCRIPTION("Packet Generator tool");
3966MODULE_LICENSE("GPL");
3967MODULE_VERSION(VERSION);
3968module_param(pg_count_d, int, 0);
3969MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3970module_param(pg_delay_d, int, 0);
3971MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3972module_param(pg_clone_skb_d, int, 0);
3973MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3974module_param(debug, int, 0);
3975MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");