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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. The if_lock should be possible to remove when add/rem_device is merged
73 * into this too.
74 *
75 * By design there should only be *one* "controlling" process. In practice
76 * multiple write accesses gives unpredictable result. Understood by "write"
77 * to /proc gives result code thats should be read be the "writer".
78 * For practical use this should be no problem.
79 *
80 * Note when adding devices to a specific CPU there good idea to also assign
81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
82 * --ro
83 *
84 * Fix refcount off by one if first packet fails, potential null deref,
85 * memleak 030710- KJP
86 *
87 * First "ranges" functionality for ipv6 030726 --ro
88 *
89 * Included flow support. 030802 ANK.
90 *
91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
92 *
93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
95 *
96 * New xmit() return, do_div and misc clean up by Stephen Hemminger
97 * <shemminger@osdl.org> 040923
98 *
99 * Randy Dunlap fixed u64 printk compiler waring
100 *
101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
103 *
104 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
106 *
107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
108 * 050103
109 *
110 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
111 *
112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
113 *
114 * Fixed src_mac command to set source mac of packet to value specified in
115 * command by Adit Ranadive <adit.262@gmail.com>
116 *
117 */
118
119#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
120
121#include <linux/sys.h>
122#include <linux/types.h>
123#include <linux/module.h>
124#include <linux/moduleparam.h>
125#include <linux/kernel.h>
126#include <linux/mutex.h>
127#include <linux/sched.h>
128#include <linux/slab.h>
129#include <linux/vmalloc.h>
130#include <linux/unistd.h>
131#include <linux/string.h>
132#include <linux/ptrace.h>
133#include <linux/errno.h>
134#include <linux/ioport.h>
135#include <linux/interrupt.h>
136#include <linux/capability.h>
137#include <linux/hrtimer.h>
138#include <linux/freezer.h>
139#include <linux/delay.h>
140#include <linux/timer.h>
141#include <linux/list.h>
142#include <linux/init.h>
143#include <linux/skbuff.h>
144#include <linux/netdevice.h>
145#include <linux/inet.h>
146#include <linux/inetdevice.h>
147#include <linux/rtnetlink.h>
148#include <linux/if_arp.h>
149#include <linux/if_vlan.h>
150#include <linux/in.h>
151#include <linux/ip.h>
152#include <linux/ipv6.h>
153#include <linux/udp.h>
154#include <linux/proc_fs.h>
155#include <linux/seq_file.h>
156#include <linux/wait.h>
157#include <linux/etherdevice.h>
158#include <linux/kthread.h>
159#include <linux/prefetch.h>
160#include <net/net_namespace.h>
161#include <net/checksum.h>
162#include <net/ipv6.h>
163#include <net/udp.h>
164#include <net/ip6_checksum.h>
165#include <net/addrconf.h>
166#ifdef CONFIG_XFRM
167#include <net/xfrm.h>
168#endif
169#include <net/netns/generic.h>
170#include <asm/byteorder.h>
171#include <linux/rcupdate.h>
172#include <linux/bitops.h>
173#include <linux/io.h>
174#include <linux/timex.h>
175#include <linux/uaccess.h>
176#include <asm/dma.h>
177#include <asm/div64.h> /* do_div */
178
179#define VERSION "2.74"
180#define IP_NAME_SZ 32
181#define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
182#define MPLS_STACK_BOTTOM htonl(0x00000100)
183
184#define func_enter() pr_debug("entering %s\n", __func__);
185
186/* Device flag bits */
187#define F_IPSRC_RND (1<<0) /* IP-Src Random */
188#define F_IPDST_RND (1<<1) /* IP-Dst Random */
189#define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
190#define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
191#define F_MACSRC_RND (1<<4) /* MAC-Src Random */
192#define F_MACDST_RND (1<<5) /* MAC-Dst Random */
193#define F_TXSIZE_RND (1<<6) /* Transmit size is random */
194#define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
195#define F_MPLS_RND (1<<8) /* Random MPLS labels */
196#define F_VID_RND (1<<9) /* Random VLAN ID */
197#define F_SVID_RND (1<<10) /* Random SVLAN ID */
198#define F_FLOW_SEQ (1<<11) /* Sequential flows */
199#define F_IPSEC_ON (1<<12) /* ipsec on for flows */
200#define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
201#define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
202#define F_NODE (1<<15) /* Node memory alloc*/
203#define F_UDPCSUM (1<<16) /* Include UDP checksum */
204
205/* Thread control flag bits */
206#define T_STOP (1<<0) /* Stop run */
207#define T_RUN (1<<1) /* Start run */
208#define T_REMDEVALL (1<<2) /* Remove all devs */
209#define T_REMDEV (1<<3) /* Remove one dev */
210
211/* If lock -- can be removed after some work */
212#define if_lock(t) spin_lock(&(t->if_lock));
213#define if_unlock(t) spin_unlock(&(t->if_lock));
214
215/* Used to help with determining the pkts on receive */
216#define PKTGEN_MAGIC 0xbe9be955
217#define PG_PROC_DIR "pktgen"
218#define PGCTRL "pgctrl"
219
220#define MAX_CFLOWS 65536
221
222#define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
223#define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
224
225struct flow_state {
226 __be32 cur_daddr;
227 int count;
228#ifdef CONFIG_XFRM
229 struct xfrm_state *x;
230#endif
231 __u32 flags;
232};
233
234/* flow flag bits */
235#define F_INIT (1<<0) /* flow has been initialized */
236
237struct pktgen_dev {
238 /*
239 * Try to keep frequent/infrequent used vars. separated.
240 */
241 struct proc_dir_entry *entry; /* proc file */
242 struct pktgen_thread *pg_thread;/* the owner */
243 struct list_head list; /* chaining in the thread's run-queue */
244
245 int running; /* if false, the test will stop */
246
247 /* If min != max, then we will either do a linear iteration, or
248 * we will do a random selection from within the range.
249 */
250 __u32 flags;
251 int removal_mark; /* non-zero => the device is marked for
252 * removal by worker thread */
253
254 int min_pkt_size;
255 int max_pkt_size;
256 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
257 int nfrags;
258 struct page *page;
259 u64 delay; /* nano-seconds */
260
261 __u64 count; /* Default No packets to send */
262 __u64 sofar; /* How many pkts we've sent so far */
263 __u64 tx_bytes; /* How many bytes we've transmitted */
264 __u64 errors; /* Errors when trying to transmit, */
265
266 /* runtime counters relating to clone_skb */
267
268 __u64 allocated_skbs;
269 __u32 clone_count;
270 int last_ok; /* Was last skb sent?
271 * Or a failed transmit of some sort?
272 * This will keep sequence numbers in order
273 */
274 ktime_t next_tx;
275 ktime_t started_at;
276 ktime_t stopped_at;
277 u64 idle_acc; /* nano-seconds */
278
279 __u32 seq_num;
280
281 int clone_skb; /*
282 * Use multiple SKBs during packet gen.
283 * If this number is greater than 1, then
284 * that many copies of the same packet will be
285 * sent before a new packet is allocated.
286 * If you want to send 1024 identical packets
287 * before creating a new packet,
288 * set clone_skb to 1024.
289 */
290
291 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
292 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
293 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
294 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
295
296 struct in6_addr in6_saddr;
297 struct in6_addr in6_daddr;
298 struct in6_addr cur_in6_daddr;
299 struct in6_addr cur_in6_saddr;
300 /* For ranges */
301 struct in6_addr min_in6_daddr;
302 struct in6_addr max_in6_daddr;
303 struct in6_addr min_in6_saddr;
304 struct in6_addr max_in6_saddr;
305
306 /* If we're doing ranges, random or incremental, then this
307 * defines the min/max for those ranges.
308 */
309 __be32 saddr_min; /* inclusive, source IP address */
310 __be32 saddr_max; /* exclusive, source IP address */
311 __be32 daddr_min; /* inclusive, dest IP address */
312 __be32 daddr_max; /* exclusive, dest IP address */
313
314 __u16 udp_src_min; /* inclusive, source UDP port */
315 __u16 udp_src_max; /* exclusive, source UDP port */
316 __u16 udp_dst_min; /* inclusive, dest UDP port */
317 __u16 udp_dst_max; /* exclusive, dest UDP port */
318
319 /* DSCP + ECN */
320 __u8 tos; /* six MSB of (former) IPv4 TOS
321 are for dscp codepoint */
322 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
323 (see RFC 3260, sec. 4) */
324
325 /* MPLS */
326 unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */
327 __be32 labels[MAX_MPLS_LABELS];
328
329 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
330 __u8 vlan_p;
331 __u8 vlan_cfi;
332 __u16 vlan_id; /* 0xffff means no vlan tag */
333
334 __u8 svlan_p;
335 __u8 svlan_cfi;
336 __u16 svlan_id; /* 0xffff means no svlan tag */
337
338 __u32 src_mac_count; /* How many MACs to iterate through */
339 __u32 dst_mac_count; /* How many MACs to iterate through */
340
341 unsigned char dst_mac[ETH_ALEN];
342 unsigned char src_mac[ETH_ALEN];
343
344 __u32 cur_dst_mac_offset;
345 __u32 cur_src_mac_offset;
346 __be32 cur_saddr;
347 __be32 cur_daddr;
348 __u16 ip_id;
349 __u16 cur_udp_dst;
350 __u16 cur_udp_src;
351 __u16 cur_queue_map;
352 __u32 cur_pkt_size;
353 __u32 last_pkt_size;
354
355 __u8 hh[14];
356 /* = {
357 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
358
359 We fill in SRC address later
360 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
361 0x08, 0x00
362 };
363 */
364 __u16 pad; /* pad out the hh struct to an even 16 bytes */
365
366 struct sk_buff *skb; /* skb we are to transmit next, used for when we
367 * are transmitting the same one multiple times
368 */
369 struct net_device *odev; /* The out-going device.
370 * Note that the device should have it's
371 * pg_info pointer pointing back to this
372 * device.
373 * Set when the user specifies the out-going
374 * device name (not when the inject is
375 * started as it used to do.)
376 */
377 char odevname[32];
378 struct flow_state *flows;
379 unsigned int cflows; /* Concurrent flows (config) */
380 unsigned int lflow; /* Flow length (config) */
381 unsigned int nflows; /* accumulated flows (stats) */
382 unsigned int curfl; /* current sequenced flow (state)*/
383
384 u16 queue_map_min;
385 u16 queue_map_max;
386 __u32 skb_priority; /* skb priority field */
387 int node; /* Memory node */
388
389#ifdef CONFIG_XFRM
390 __u8 ipsmode; /* IPSEC mode (config) */
391 __u8 ipsproto; /* IPSEC type (config) */
392 __u32 spi;
393 struct dst_entry dst;
394 struct dst_ops dstops;
395#endif
396 char result[512];
397};
398
399struct pktgen_hdr {
400 __be32 pgh_magic;
401 __be32 seq_num;
402 __be32 tv_sec;
403 __be32 tv_usec;
404};
405
406
407static int pg_net_id __read_mostly;
408
409struct pktgen_net {
410 struct net *net;
411 struct proc_dir_entry *proc_dir;
412 struct list_head pktgen_threads;
413 bool pktgen_exiting;
414};
415
416struct pktgen_thread {
417 spinlock_t if_lock; /* for list of devices */
418 struct list_head if_list; /* All device here */
419 struct list_head th_list;
420 struct task_struct *tsk;
421 char result[512];
422
423 /* Field for thread to receive "posted" events terminate,
424 stop ifs etc. */
425
426 u32 control;
427 int cpu;
428
429 wait_queue_head_t queue;
430 struct completion start_done;
431 struct pktgen_net *net;
432};
433
434#define REMOVE 1
435#define FIND 0
436
437static const char version[] =
438 "Packet Generator for packet performance testing. "
439 "Version: " VERSION "\n";
440
441static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
442static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
443static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
444 const char *ifname, bool exact);
445static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
446static void pktgen_run_all_threads(struct pktgen_net *pn);
447static void pktgen_reset_all_threads(struct pktgen_net *pn);
448static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn);
449
450static void pktgen_stop(struct pktgen_thread *t);
451static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
452
453/* Module parameters, defaults. */
454static int pg_count_d __read_mostly = 1000;
455static int pg_delay_d __read_mostly;
456static int pg_clone_skb_d __read_mostly;
457static int debug __read_mostly;
458
459static DEFINE_MUTEX(pktgen_thread_lock);
460
461static struct notifier_block pktgen_notifier_block = {
462 .notifier_call = pktgen_device_event,
463};
464
465/*
466 * /proc handling functions
467 *
468 */
469
470static int pgctrl_show(struct seq_file *seq, void *v)
471{
472 seq_puts(seq, version);
473 return 0;
474}
475
476static ssize_t pgctrl_write(struct file *file, const char __user *buf,
477 size_t count, loff_t *ppos)
478{
479 char data[128];
480 struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
481
482 if (!capable(CAP_NET_ADMIN))
483 return -EPERM;
484
485 if (count == 0)
486 return -EINVAL;
487
488 if (count > sizeof(data))
489 count = sizeof(data);
490
491 if (copy_from_user(data, buf, count))
492 return -EFAULT;
493
494 data[count - 1] = 0; /* Strip trailing '\n' and terminate string */
495
496 if (!strcmp(data, "stop"))
497 pktgen_stop_all_threads_ifs(pn);
498
499 else if (!strcmp(data, "start"))
500 pktgen_run_all_threads(pn);
501
502 else if (!strcmp(data, "reset"))
503 pktgen_reset_all_threads(pn);
504
505 else
506 pr_warning("Unknown command: %s\n", data);
507
508 return count;
509}
510
511static int pgctrl_open(struct inode *inode, struct file *file)
512{
513 return single_open(file, pgctrl_show, PDE_DATA(inode));
514}
515
516static const struct file_operations pktgen_fops = {
517 .owner = THIS_MODULE,
518 .open = pgctrl_open,
519 .read = seq_read,
520 .llseek = seq_lseek,
521 .write = pgctrl_write,
522 .release = single_release,
523};
524
525static int pktgen_if_show(struct seq_file *seq, void *v)
526{
527 const struct pktgen_dev *pkt_dev = seq->private;
528 ktime_t stopped;
529 u64 idle;
530
531 seq_printf(seq,
532 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
533 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
534 pkt_dev->max_pkt_size);
535
536 seq_printf(seq,
537 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
538 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
539 pkt_dev->clone_skb, pkt_dev->odevname);
540
541 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
542 pkt_dev->lflow);
543
544 seq_printf(seq,
545 " queue_map_min: %u queue_map_max: %u\n",
546 pkt_dev->queue_map_min,
547 pkt_dev->queue_map_max);
548
549 if (pkt_dev->skb_priority)
550 seq_printf(seq, " skb_priority: %u\n",
551 pkt_dev->skb_priority);
552
553 if (pkt_dev->flags & F_IPV6) {
554 seq_printf(seq,
555 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
556 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
557 &pkt_dev->in6_saddr,
558 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
559 &pkt_dev->in6_daddr,
560 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
561 } else {
562 seq_printf(seq,
563 " dst_min: %s dst_max: %s\n",
564 pkt_dev->dst_min, pkt_dev->dst_max);
565 seq_printf(seq,
566 " src_min: %s src_max: %s\n",
567 pkt_dev->src_min, pkt_dev->src_max);
568 }
569
570 seq_puts(seq, " src_mac: ");
571
572 seq_printf(seq, "%pM ",
573 is_zero_ether_addr(pkt_dev->src_mac) ?
574 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
575
576 seq_printf(seq, "dst_mac: ");
577 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
578
579 seq_printf(seq,
580 " udp_src_min: %d udp_src_max: %d"
581 " udp_dst_min: %d udp_dst_max: %d\n",
582 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
583 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
584
585 seq_printf(seq,
586 " src_mac_count: %d dst_mac_count: %d\n",
587 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
588
589 if (pkt_dev->nr_labels) {
590 unsigned int i;
591 seq_printf(seq, " mpls: ");
592 for (i = 0; i < pkt_dev->nr_labels; i++)
593 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
594 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
595 }
596
597 if (pkt_dev->vlan_id != 0xffff)
598 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
599 pkt_dev->vlan_id, pkt_dev->vlan_p,
600 pkt_dev->vlan_cfi);
601
602 if (pkt_dev->svlan_id != 0xffff)
603 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
604 pkt_dev->svlan_id, pkt_dev->svlan_p,
605 pkt_dev->svlan_cfi);
606
607 if (pkt_dev->tos)
608 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
609
610 if (pkt_dev->traffic_class)
611 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
612
613 if (pkt_dev->node >= 0)
614 seq_printf(seq, " node: %d\n", pkt_dev->node);
615
616 seq_printf(seq, " Flags: ");
617
618 if (pkt_dev->flags & F_IPV6)
619 seq_printf(seq, "IPV6 ");
620
621 if (pkt_dev->flags & F_IPSRC_RND)
622 seq_printf(seq, "IPSRC_RND ");
623
624 if (pkt_dev->flags & F_IPDST_RND)
625 seq_printf(seq, "IPDST_RND ");
626
627 if (pkt_dev->flags & F_TXSIZE_RND)
628 seq_printf(seq, "TXSIZE_RND ");
629
630 if (pkt_dev->flags & F_UDPSRC_RND)
631 seq_printf(seq, "UDPSRC_RND ");
632
633 if (pkt_dev->flags & F_UDPDST_RND)
634 seq_printf(seq, "UDPDST_RND ");
635
636 if (pkt_dev->flags & F_UDPCSUM)
637 seq_printf(seq, "UDPCSUM ");
638
639 if (pkt_dev->flags & F_MPLS_RND)
640 seq_printf(seq, "MPLS_RND ");
641
642 if (pkt_dev->flags & F_QUEUE_MAP_RND)
643 seq_printf(seq, "QUEUE_MAP_RND ");
644
645 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
646 seq_printf(seq, "QUEUE_MAP_CPU ");
647
648 if (pkt_dev->cflows) {
649 if (pkt_dev->flags & F_FLOW_SEQ)
650 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
651 else
652 seq_printf(seq, "FLOW_RND ");
653 }
654
655#ifdef CONFIG_XFRM
656 if (pkt_dev->flags & F_IPSEC_ON) {
657 seq_printf(seq, "IPSEC ");
658 if (pkt_dev->spi)
659 seq_printf(seq, "spi:%u", pkt_dev->spi);
660 }
661#endif
662
663 if (pkt_dev->flags & F_MACSRC_RND)
664 seq_printf(seq, "MACSRC_RND ");
665
666 if (pkt_dev->flags & F_MACDST_RND)
667 seq_printf(seq, "MACDST_RND ");
668
669 if (pkt_dev->flags & F_VID_RND)
670 seq_printf(seq, "VID_RND ");
671
672 if (pkt_dev->flags & F_SVID_RND)
673 seq_printf(seq, "SVID_RND ");
674
675 if (pkt_dev->flags & F_NODE)
676 seq_printf(seq, "NODE_ALLOC ");
677
678 seq_puts(seq, "\n");
679
680 /* not really stopped, more like last-running-at */
681 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at;
682 idle = pkt_dev->idle_acc;
683 do_div(idle, NSEC_PER_USEC);
684
685 seq_printf(seq,
686 "Current:\n pkts-sofar: %llu errors: %llu\n",
687 (unsigned long long)pkt_dev->sofar,
688 (unsigned long long)pkt_dev->errors);
689
690 seq_printf(seq,
691 " started: %lluus stopped: %lluus idle: %lluus\n",
692 (unsigned long long) ktime_to_us(pkt_dev->started_at),
693 (unsigned long long) ktime_to_us(stopped),
694 (unsigned long long) idle);
695
696 seq_printf(seq,
697 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
698 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
699 pkt_dev->cur_src_mac_offset);
700
701 if (pkt_dev->flags & F_IPV6) {
702 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
703 &pkt_dev->cur_in6_saddr,
704 &pkt_dev->cur_in6_daddr);
705 } else
706 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n",
707 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
708
709 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
710 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
711
712 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
713
714 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
715
716 if (pkt_dev->result[0])
717 seq_printf(seq, "Result: %s\n", pkt_dev->result);
718 else
719 seq_printf(seq, "Result: Idle\n");
720
721 return 0;
722}
723
724
725static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
726 __u32 *num)
727{
728 int i = 0;
729 *num = 0;
730
731 for (; i < maxlen; i++) {
732 int value;
733 char c;
734 *num <<= 4;
735 if (get_user(c, &user_buffer[i]))
736 return -EFAULT;
737 value = hex_to_bin(c);
738 if (value >= 0)
739 *num |= value;
740 else
741 break;
742 }
743 return i;
744}
745
746static int count_trail_chars(const char __user * user_buffer,
747 unsigned int maxlen)
748{
749 int i;
750
751 for (i = 0; i < maxlen; i++) {
752 char c;
753 if (get_user(c, &user_buffer[i]))
754 return -EFAULT;
755 switch (c) {
756 case '\"':
757 case '\n':
758 case '\r':
759 case '\t':
760 case ' ':
761 case '=':
762 break;
763 default:
764 goto done;
765 }
766 }
767done:
768 return i;
769}
770
771static long num_arg(const char __user *user_buffer, unsigned long maxlen,
772 unsigned long *num)
773{
774 int i;
775 *num = 0;
776
777 for (i = 0; i < maxlen; i++) {
778 char c;
779 if (get_user(c, &user_buffer[i]))
780 return -EFAULT;
781 if ((c >= '0') && (c <= '9')) {
782 *num *= 10;
783 *num += c - '0';
784 } else
785 break;
786 }
787 return i;
788}
789
790static int strn_len(const char __user * user_buffer, unsigned int maxlen)
791{
792 int i;
793
794 for (i = 0; i < maxlen; i++) {
795 char c;
796 if (get_user(c, &user_buffer[i]))
797 return -EFAULT;
798 switch (c) {
799 case '\"':
800 case '\n':
801 case '\r':
802 case '\t':
803 case ' ':
804 goto done_str;
805 break;
806 default:
807 break;
808 }
809 }
810done_str:
811 return i;
812}
813
814static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
815{
816 unsigned int n = 0;
817 char c;
818 ssize_t i = 0;
819 int len;
820
821 pkt_dev->nr_labels = 0;
822 do {
823 __u32 tmp;
824 len = hex32_arg(&buffer[i], 8, &tmp);
825 if (len <= 0)
826 return len;
827 pkt_dev->labels[n] = htonl(tmp);
828 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
829 pkt_dev->flags |= F_MPLS_RND;
830 i += len;
831 if (get_user(c, &buffer[i]))
832 return -EFAULT;
833 i++;
834 n++;
835 if (n >= MAX_MPLS_LABELS)
836 return -E2BIG;
837 } while (c == ',');
838
839 pkt_dev->nr_labels = n;
840 return i;
841}
842
843static ssize_t pktgen_if_write(struct file *file,
844 const char __user * user_buffer, size_t count,
845 loff_t * offset)
846{
847 struct seq_file *seq = file->private_data;
848 struct pktgen_dev *pkt_dev = seq->private;
849 int i, max, len;
850 char name[16], valstr[32];
851 unsigned long value = 0;
852 char *pg_result = NULL;
853 int tmp = 0;
854 char buf[128];
855
856 pg_result = &(pkt_dev->result[0]);
857
858 if (count < 1) {
859 pr_warning("wrong command format\n");
860 return -EINVAL;
861 }
862
863 max = count;
864 tmp = count_trail_chars(user_buffer, max);
865 if (tmp < 0) {
866 pr_warning("illegal format\n");
867 return tmp;
868 }
869 i = tmp;
870
871 /* Read variable name */
872
873 len = strn_len(&user_buffer[i], sizeof(name) - 1);
874 if (len < 0)
875 return len;
876
877 memset(name, 0, sizeof(name));
878 if (copy_from_user(name, &user_buffer[i], len))
879 return -EFAULT;
880 i += len;
881
882 max = count - i;
883 len = count_trail_chars(&user_buffer[i], max);
884 if (len < 0)
885 return len;
886
887 i += len;
888
889 if (debug) {
890 size_t copy = min_t(size_t, count, 1023);
891 char tb[copy + 1];
892 if (copy_from_user(tb, user_buffer, copy))
893 return -EFAULT;
894 tb[copy] = 0;
895 pr_debug("%s,%lu buffer -:%s:-\n",
896 name, (unsigned long)count, tb);
897 }
898
899 if (!strcmp(name, "min_pkt_size")) {
900 len = num_arg(&user_buffer[i], 10, &value);
901 if (len < 0)
902 return len;
903
904 i += len;
905 if (value < 14 + 20 + 8)
906 value = 14 + 20 + 8;
907 if (value != pkt_dev->min_pkt_size) {
908 pkt_dev->min_pkt_size = value;
909 pkt_dev->cur_pkt_size = value;
910 }
911 sprintf(pg_result, "OK: min_pkt_size=%u",
912 pkt_dev->min_pkt_size);
913 return count;
914 }
915
916 if (!strcmp(name, "max_pkt_size")) {
917 len = num_arg(&user_buffer[i], 10, &value);
918 if (len < 0)
919 return len;
920
921 i += len;
922 if (value < 14 + 20 + 8)
923 value = 14 + 20 + 8;
924 if (value != pkt_dev->max_pkt_size) {
925 pkt_dev->max_pkt_size = value;
926 pkt_dev->cur_pkt_size = value;
927 }
928 sprintf(pg_result, "OK: max_pkt_size=%u",
929 pkt_dev->max_pkt_size);
930 return count;
931 }
932
933 /* Shortcut for min = max */
934
935 if (!strcmp(name, "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->min_pkt_size) {
944 pkt_dev->min_pkt_size = value;
945 pkt_dev->max_pkt_size = value;
946 pkt_dev->cur_pkt_size = value;
947 }
948 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
949 return count;
950 }
951
952 if (!strcmp(name, "debug")) {
953 len = num_arg(&user_buffer[i], 10, &value);
954 if (len < 0)
955 return len;
956
957 i += len;
958 debug = value;
959 sprintf(pg_result, "OK: debug=%u", debug);
960 return count;
961 }
962
963 if (!strcmp(name, "frags")) {
964 len = num_arg(&user_buffer[i], 10, &value);
965 if (len < 0)
966 return len;
967
968 i += len;
969 pkt_dev->nfrags = value;
970 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
971 return count;
972 }
973 if (!strcmp(name, "delay")) {
974 len = num_arg(&user_buffer[i], 10, &value);
975 if (len < 0)
976 return len;
977
978 i += len;
979 if (value == 0x7FFFFFFF)
980 pkt_dev->delay = ULLONG_MAX;
981 else
982 pkt_dev->delay = (u64)value;
983
984 sprintf(pg_result, "OK: delay=%llu",
985 (unsigned long long) pkt_dev->delay);
986 return count;
987 }
988 if (!strcmp(name, "rate")) {
989 len = num_arg(&user_buffer[i], 10, &value);
990 if (len < 0)
991 return len;
992
993 i += len;
994 if (!value)
995 return len;
996 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
997 if (debug)
998 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
999
1000 sprintf(pg_result, "OK: rate=%lu", value);
1001 return count;
1002 }
1003 if (!strcmp(name, "ratep")) {
1004 len = num_arg(&user_buffer[i], 10, &value);
1005 if (len < 0)
1006 return len;
1007
1008 i += len;
1009 if (!value)
1010 return len;
1011 pkt_dev->delay = NSEC_PER_SEC/value;
1012 if (debug)
1013 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1014
1015 sprintf(pg_result, "OK: rate=%lu", value);
1016 return count;
1017 }
1018 if (!strcmp(name, "udp_src_min")) {
1019 len = num_arg(&user_buffer[i], 10, &value);
1020 if (len < 0)
1021 return len;
1022
1023 i += len;
1024 if (value != pkt_dev->udp_src_min) {
1025 pkt_dev->udp_src_min = value;
1026 pkt_dev->cur_udp_src = value;
1027 }
1028 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1029 return count;
1030 }
1031 if (!strcmp(name, "udp_dst_min")) {
1032 len = num_arg(&user_buffer[i], 10, &value);
1033 if (len < 0)
1034 return len;
1035
1036 i += len;
1037 if (value != pkt_dev->udp_dst_min) {
1038 pkt_dev->udp_dst_min = value;
1039 pkt_dev->cur_udp_dst = value;
1040 }
1041 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1042 return count;
1043 }
1044 if (!strcmp(name, "udp_src_max")) {
1045 len = num_arg(&user_buffer[i], 10, &value);
1046 if (len < 0)
1047 return len;
1048
1049 i += len;
1050 if (value != pkt_dev->udp_src_max) {
1051 pkt_dev->udp_src_max = value;
1052 pkt_dev->cur_udp_src = value;
1053 }
1054 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1055 return count;
1056 }
1057 if (!strcmp(name, "udp_dst_max")) {
1058 len = num_arg(&user_buffer[i], 10, &value);
1059 if (len < 0)
1060 return len;
1061
1062 i += len;
1063 if (value != pkt_dev->udp_dst_max) {
1064 pkt_dev->udp_dst_max = value;
1065 pkt_dev->cur_udp_dst = value;
1066 }
1067 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1068 return count;
1069 }
1070 if (!strcmp(name, "clone_skb")) {
1071 len = num_arg(&user_buffer[i], 10, &value);
1072 if (len < 0)
1073 return len;
1074 if ((value > 0) &&
1075 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1076 return -ENOTSUPP;
1077 i += len;
1078 pkt_dev->clone_skb = value;
1079
1080 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1081 return count;
1082 }
1083 if (!strcmp(name, "count")) {
1084 len = num_arg(&user_buffer[i], 10, &value);
1085 if (len < 0)
1086 return len;
1087
1088 i += len;
1089 pkt_dev->count = value;
1090 sprintf(pg_result, "OK: count=%llu",
1091 (unsigned long long)pkt_dev->count);
1092 return count;
1093 }
1094 if (!strcmp(name, "src_mac_count")) {
1095 len = num_arg(&user_buffer[i], 10, &value);
1096 if (len < 0)
1097 return len;
1098
1099 i += len;
1100 if (pkt_dev->src_mac_count != value) {
1101 pkt_dev->src_mac_count = value;
1102 pkt_dev->cur_src_mac_offset = 0;
1103 }
1104 sprintf(pg_result, "OK: src_mac_count=%d",
1105 pkt_dev->src_mac_count);
1106 return count;
1107 }
1108 if (!strcmp(name, "dst_mac_count")) {
1109 len = num_arg(&user_buffer[i], 10, &value);
1110 if (len < 0)
1111 return len;
1112
1113 i += len;
1114 if (pkt_dev->dst_mac_count != value) {
1115 pkt_dev->dst_mac_count = value;
1116 pkt_dev->cur_dst_mac_offset = 0;
1117 }
1118 sprintf(pg_result, "OK: dst_mac_count=%d",
1119 pkt_dev->dst_mac_count);
1120 return count;
1121 }
1122 if (!strcmp(name, "node")) {
1123 len = num_arg(&user_buffer[i], 10, &value);
1124 if (len < 0)
1125 return len;
1126
1127 i += len;
1128
1129 if (node_possible(value)) {
1130 pkt_dev->node = value;
1131 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1132 if (pkt_dev->page) {
1133 put_page(pkt_dev->page);
1134 pkt_dev->page = NULL;
1135 }
1136 }
1137 else
1138 sprintf(pg_result, "ERROR: node not possible");
1139 return count;
1140 }
1141 if (!strcmp(name, "flag")) {
1142 char f[32];
1143 memset(f, 0, 32);
1144 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1145 if (len < 0)
1146 return len;
1147
1148 if (copy_from_user(f, &user_buffer[i], len))
1149 return -EFAULT;
1150 i += len;
1151 if (strcmp(f, "IPSRC_RND") == 0)
1152 pkt_dev->flags |= F_IPSRC_RND;
1153
1154 else if (strcmp(f, "!IPSRC_RND") == 0)
1155 pkt_dev->flags &= ~F_IPSRC_RND;
1156
1157 else if (strcmp(f, "TXSIZE_RND") == 0)
1158 pkt_dev->flags |= F_TXSIZE_RND;
1159
1160 else if (strcmp(f, "!TXSIZE_RND") == 0)
1161 pkt_dev->flags &= ~F_TXSIZE_RND;
1162
1163 else if (strcmp(f, "IPDST_RND") == 0)
1164 pkt_dev->flags |= F_IPDST_RND;
1165
1166 else if (strcmp(f, "!IPDST_RND") == 0)
1167 pkt_dev->flags &= ~F_IPDST_RND;
1168
1169 else if (strcmp(f, "UDPSRC_RND") == 0)
1170 pkt_dev->flags |= F_UDPSRC_RND;
1171
1172 else if (strcmp(f, "!UDPSRC_RND") == 0)
1173 pkt_dev->flags &= ~F_UDPSRC_RND;
1174
1175 else if (strcmp(f, "UDPDST_RND") == 0)
1176 pkt_dev->flags |= F_UDPDST_RND;
1177
1178 else if (strcmp(f, "!UDPDST_RND") == 0)
1179 pkt_dev->flags &= ~F_UDPDST_RND;
1180
1181 else if (strcmp(f, "MACSRC_RND") == 0)
1182 pkt_dev->flags |= F_MACSRC_RND;
1183
1184 else if (strcmp(f, "!MACSRC_RND") == 0)
1185 pkt_dev->flags &= ~F_MACSRC_RND;
1186
1187 else if (strcmp(f, "MACDST_RND") == 0)
1188 pkt_dev->flags |= F_MACDST_RND;
1189
1190 else if (strcmp(f, "!MACDST_RND") == 0)
1191 pkt_dev->flags &= ~F_MACDST_RND;
1192
1193 else if (strcmp(f, "MPLS_RND") == 0)
1194 pkt_dev->flags |= F_MPLS_RND;
1195
1196 else if (strcmp(f, "!MPLS_RND") == 0)
1197 pkt_dev->flags &= ~F_MPLS_RND;
1198
1199 else if (strcmp(f, "VID_RND") == 0)
1200 pkt_dev->flags |= F_VID_RND;
1201
1202 else if (strcmp(f, "!VID_RND") == 0)
1203 pkt_dev->flags &= ~F_VID_RND;
1204
1205 else if (strcmp(f, "SVID_RND") == 0)
1206 pkt_dev->flags |= F_SVID_RND;
1207
1208 else if (strcmp(f, "!SVID_RND") == 0)
1209 pkt_dev->flags &= ~F_SVID_RND;
1210
1211 else if (strcmp(f, "FLOW_SEQ") == 0)
1212 pkt_dev->flags |= F_FLOW_SEQ;
1213
1214 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1215 pkt_dev->flags |= F_QUEUE_MAP_RND;
1216
1217 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1218 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1219
1220 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1221 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1222
1223 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1224 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1225#ifdef CONFIG_XFRM
1226 else if (strcmp(f, "IPSEC") == 0)
1227 pkt_dev->flags |= F_IPSEC_ON;
1228#endif
1229
1230 else if (strcmp(f, "!IPV6") == 0)
1231 pkt_dev->flags &= ~F_IPV6;
1232
1233 else if (strcmp(f, "NODE_ALLOC") == 0)
1234 pkt_dev->flags |= F_NODE;
1235
1236 else if (strcmp(f, "!NODE_ALLOC") == 0)
1237 pkt_dev->flags &= ~F_NODE;
1238
1239 else if (strcmp(f, "UDPCSUM") == 0)
1240 pkt_dev->flags |= F_UDPCSUM;
1241
1242 else if (strcmp(f, "!UDPCSUM") == 0)
1243 pkt_dev->flags &= ~F_UDPCSUM;
1244
1245 else {
1246 sprintf(pg_result,
1247 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1248 f,
1249 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1250 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, "
1251 "MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, "
1252 "QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, "
1253#ifdef CONFIG_XFRM
1254 "IPSEC, "
1255#endif
1256 "NODE_ALLOC\n");
1257 return count;
1258 }
1259 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1260 return count;
1261 }
1262 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1263 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1264 if (len < 0)
1265 return len;
1266
1267 if (copy_from_user(buf, &user_buffer[i], len))
1268 return -EFAULT;
1269 buf[len] = 0;
1270 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1271 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1272 strncpy(pkt_dev->dst_min, buf, len);
1273 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1274 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1275 }
1276 if (debug)
1277 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
1278 i += len;
1279 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1280 return count;
1281 }
1282 if (!strcmp(name, "dst_max")) {
1283 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1284 if (len < 0)
1285 return len;
1286
1287
1288 if (copy_from_user(buf, &user_buffer[i], len))
1289 return -EFAULT;
1290
1291 buf[len] = 0;
1292 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1293 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1294 strncpy(pkt_dev->dst_max, buf, len);
1295 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1296 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1297 }
1298 if (debug)
1299 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
1300 i += len;
1301 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1302 return count;
1303 }
1304 if (!strcmp(name, "dst6")) {
1305 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1306 if (len < 0)
1307 return len;
1308
1309 pkt_dev->flags |= F_IPV6;
1310
1311 if (copy_from_user(buf, &user_buffer[i], len))
1312 return -EFAULT;
1313 buf[len] = 0;
1314
1315 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
1316 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1317
1318 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1319
1320 if (debug)
1321 pr_debug("dst6 set to: %s\n", buf);
1322
1323 i += len;
1324 sprintf(pg_result, "OK: dst6=%s", buf);
1325 return count;
1326 }
1327 if (!strcmp(name, "dst6_min")) {
1328 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1329 if (len < 0)
1330 return len;
1331
1332 pkt_dev->flags |= F_IPV6;
1333
1334 if (copy_from_user(buf, &user_buffer[i], len))
1335 return -EFAULT;
1336 buf[len] = 0;
1337
1338 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
1339 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1340
1341 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
1342 if (debug)
1343 pr_debug("dst6_min set to: %s\n", buf);
1344
1345 i += len;
1346 sprintf(pg_result, "OK: dst6_min=%s", buf);
1347 return count;
1348 }
1349 if (!strcmp(name, "dst6_max")) {
1350 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1351 if (len < 0)
1352 return len;
1353
1354 pkt_dev->flags |= F_IPV6;
1355
1356 if (copy_from_user(buf, &user_buffer[i], len))
1357 return -EFAULT;
1358 buf[len] = 0;
1359
1360 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
1361 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1362
1363 if (debug)
1364 pr_debug("dst6_max set to: %s\n", buf);
1365
1366 i += len;
1367 sprintf(pg_result, "OK: dst6_max=%s", buf);
1368 return count;
1369 }
1370 if (!strcmp(name, "src6")) {
1371 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1372 if (len < 0)
1373 return len;
1374
1375 pkt_dev->flags |= F_IPV6;
1376
1377 if (copy_from_user(buf, &user_buffer[i], len))
1378 return -EFAULT;
1379 buf[len] = 0;
1380
1381 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
1382 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1383
1384 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1385
1386 if (debug)
1387 pr_debug("src6 set to: %s\n", buf);
1388
1389 i += len;
1390 sprintf(pg_result, "OK: src6=%s", buf);
1391 return count;
1392 }
1393 if (!strcmp(name, "src_min")) {
1394 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1395 if (len < 0)
1396 return len;
1397
1398 if (copy_from_user(buf, &user_buffer[i], len))
1399 return -EFAULT;
1400 buf[len] = 0;
1401 if (strcmp(buf, pkt_dev->src_min) != 0) {
1402 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1403 strncpy(pkt_dev->src_min, buf, len);
1404 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1405 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1406 }
1407 if (debug)
1408 pr_debug("src_min set to: %s\n", pkt_dev->src_min);
1409 i += len;
1410 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1411 return count;
1412 }
1413 if (!strcmp(name, "src_max")) {
1414 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1415 if (len < 0)
1416 return len;
1417
1418 if (copy_from_user(buf, &user_buffer[i], len))
1419 return -EFAULT;
1420 buf[len] = 0;
1421 if (strcmp(buf, pkt_dev->src_max) != 0) {
1422 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1423 strncpy(pkt_dev->src_max, buf, len);
1424 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1425 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1426 }
1427 if (debug)
1428 pr_debug("src_max set to: %s\n", pkt_dev->src_max);
1429 i += len;
1430 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1431 return count;
1432 }
1433 if (!strcmp(name, "dst_mac")) {
1434 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1435 if (len < 0)
1436 return len;
1437
1438 memset(valstr, 0, sizeof(valstr));
1439 if (copy_from_user(valstr, &user_buffer[i], len))
1440 return -EFAULT;
1441
1442 if (!mac_pton(valstr, pkt_dev->dst_mac))
1443 return -EINVAL;
1444 /* Set up Dest MAC */
1445 ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac);
1446
1447 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1448 return count;
1449 }
1450 if (!strcmp(name, "src_mac")) {
1451 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1452 if (len < 0)
1453 return len;
1454
1455 memset(valstr, 0, sizeof(valstr));
1456 if (copy_from_user(valstr, &user_buffer[i], len))
1457 return -EFAULT;
1458
1459 if (!mac_pton(valstr, pkt_dev->src_mac))
1460 return -EINVAL;
1461 /* Set up Src MAC */
1462 ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac);
1463
1464 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1465 return count;
1466 }
1467
1468 if (!strcmp(name, "clear_counters")) {
1469 pktgen_clear_counters(pkt_dev);
1470 sprintf(pg_result, "OK: Clearing counters.\n");
1471 return count;
1472 }
1473
1474 if (!strcmp(name, "flows")) {
1475 len = num_arg(&user_buffer[i], 10, &value);
1476 if (len < 0)
1477 return len;
1478
1479 i += len;
1480 if (value > MAX_CFLOWS)
1481 value = MAX_CFLOWS;
1482
1483 pkt_dev->cflows = value;
1484 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1485 return count;
1486 }
1487#ifdef CONFIG_XFRM
1488 if (!strcmp(name, "spi")) {
1489 len = num_arg(&user_buffer[i], 10, &value);
1490 if (len < 0)
1491 return len;
1492
1493 i += len;
1494 pkt_dev->spi = value;
1495 sprintf(pg_result, "OK: spi=%u", pkt_dev->spi);
1496 return count;
1497 }
1498#endif
1499 if (!strcmp(name, "flowlen")) {
1500 len = num_arg(&user_buffer[i], 10, &value);
1501 if (len < 0)
1502 return len;
1503
1504 i += len;
1505 pkt_dev->lflow = value;
1506 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1507 return count;
1508 }
1509
1510 if (!strcmp(name, "queue_map_min")) {
1511 len = num_arg(&user_buffer[i], 5, &value);
1512 if (len < 0)
1513 return len;
1514
1515 i += len;
1516 pkt_dev->queue_map_min = value;
1517 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1518 return count;
1519 }
1520
1521 if (!strcmp(name, "queue_map_max")) {
1522 len = num_arg(&user_buffer[i], 5, &value);
1523 if (len < 0)
1524 return len;
1525
1526 i += len;
1527 pkt_dev->queue_map_max = value;
1528 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1529 return count;
1530 }
1531
1532 if (!strcmp(name, "mpls")) {
1533 unsigned int n, cnt;
1534
1535 len = get_labels(&user_buffer[i], pkt_dev);
1536 if (len < 0)
1537 return len;
1538 i += len;
1539 cnt = sprintf(pg_result, "OK: mpls=");
1540 for (n = 0; n < pkt_dev->nr_labels; n++)
1541 cnt += sprintf(pg_result + cnt,
1542 "%08x%s", ntohl(pkt_dev->labels[n]),
1543 n == pkt_dev->nr_labels-1 ? "" : ",");
1544
1545 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1546 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1547 pkt_dev->svlan_id = 0xffff;
1548
1549 if (debug)
1550 pr_debug("VLAN/SVLAN auto turned off\n");
1551 }
1552 return count;
1553 }
1554
1555 if (!strcmp(name, "vlan_id")) {
1556 len = num_arg(&user_buffer[i], 4, &value);
1557 if (len < 0)
1558 return len;
1559
1560 i += len;
1561 if (value <= 4095) {
1562 pkt_dev->vlan_id = value; /* turn on VLAN */
1563
1564 if (debug)
1565 pr_debug("VLAN turned on\n");
1566
1567 if (debug && pkt_dev->nr_labels)
1568 pr_debug("MPLS auto turned off\n");
1569
1570 pkt_dev->nr_labels = 0; /* turn off MPLS */
1571 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1572 } else {
1573 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1574 pkt_dev->svlan_id = 0xffff;
1575
1576 if (debug)
1577 pr_debug("VLAN/SVLAN turned off\n");
1578 }
1579 return count;
1580 }
1581
1582 if (!strcmp(name, "vlan_p")) {
1583 len = num_arg(&user_buffer[i], 1, &value);
1584 if (len < 0)
1585 return len;
1586
1587 i += len;
1588 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1589 pkt_dev->vlan_p = value;
1590 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1591 } else {
1592 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1593 }
1594 return count;
1595 }
1596
1597 if (!strcmp(name, "vlan_cfi")) {
1598 len = num_arg(&user_buffer[i], 1, &value);
1599 if (len < 0)
1600 return len;
1601
1602 i += len;
1603 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1604 pkt_dev->vlan_cfi = value;
1605 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1606 } else {
1607 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1608 }
1609 return count;
1610 }
1611
1612 if (!strcmp(name, "svlan_id")) {
1613 len = num_arg(&user_buffer[i], 4, &value);
1614 if (len < 0)
1615 return len;
1616
1617 i += len;
1618 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1619 pkt_dev->svlan_id = value; /* turn on SVLAN */
1620
1621 if (debug)
1622 pr_debug("SVLAN turned on\n");
1623
1624 if (debug && pkt_dev->nr_labels)
1625 pr_debug("MPLS auto turned off\n");
1626
1627 pkt_dev->nr_labels = 0; /* turn off MPLS */
1628 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1629 } else {
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 turned off\n");
1635 }
1636 return count;
1637 }
1638
1639 if (!strcmp(name, "svlan_p")) {
1640 len = num_arg(&user_buffer[i], 1, &value);
1641 if (len < 0)
1642 return len;
1643
1644 i += len;
1645 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1646 pkt_dev->svlan_p = value;
1647 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1648 } else {
1649 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1650 }
1651 return count;
1652 }
1653
1654 if (!strcmp(name, "svlan_cfi")) {
1655 len = num_arg(&user_buffer[i], 1, &value);
1656 if (len < 0)
1657 return len;
1658
1659 i += len;
1660 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1661 pkt_dev->svlan_cfi = value;
1662 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1663 } else {
1664 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1665 }
1666 return count;
1667 }
1668
1669 if (!strcmp(name, "tos")) {
1670 __u32 tmp_value = 0;
1671 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1672 if (len < 0)
1673 return len;
1674
1675 i += len;
1676 if (len == 2) {
1677 pkt_dev->tos = tmp_value;
1678 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1679 } else {
1680 sprintf(pg_result, "ERROR: tos must be 00-ff");
1681 }
1682 return count;
1683 }
1684
1685 if (!strcmp(name, "traffic_class")) {
1686 __u32 tmp_value = 0;
1687 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1688 if (len < 0)
1689 return len;
1690
1691 i += len;
1692 if (len == 2) {
1693 pkt_dev->traffic_class = tmp_value;
1694 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1695 } else {
1696 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1697 }
1698 return count;
1699 }
1700
1701 if (!strcmp(name, "skb_priority")) {
1702 len = num_arg(&user_buffer[i], 9, &value);
1703 if (len < 0)
1704 return len;
1705
1706 i += len;
1707 pkt_dev->skb_priority = value;
1708 sprintf(pg_result, "OK: skb_priority=%i",
1709 pkt_dev->skb_priority);
1710 return count;
1711 }
1712
1713 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1714 return -EINVAL;
1715}
1716
1717static int pktgen_if_open(struct inode *inode, struct file *file)
1718{
1719 return single_open(file, pktgen_if_show, PDE_DATA(inode));
1720}
1721
1722static const struct file_operations pktgen_if_fops = {
1723 .owner = THIS_MODULE,
1724 .open = pktgen_if_open,
1725 .read = seq_read,
1726 .llseek = seq_lseek,
1727 .write = pktgen_if_write,
1728 .release = single_release,
1729};
1730
1731static int pktgen_thread_show(struct seq_file *seq, void *v)
1732{
1733 struct pktgen_thread *t = seq->private;
1734 const struct pktgen_dev *pkt_dev;
1735
1736 BUG_ON(!t);
1737
1738 seq_printf(seq, "Running: ");
1739
1740 if_lock(t);
1741 list_for_each_entry(pkt_dev, &t->if_list, list)
1742 if (pkt_dev->running)
1743 seq_printf(seq, "%s ", pkt_dev->odevname);
1744
1745 seq_printf(seq, "\nStopped: ");
1746
1747 list_for_each_entry(pkt_dev, &t->if_list, list)
1748 if (!pkt_dev->running)
1749 seq_printf(seq, "%s ", pkt_dev->odevname);
1750
1751 if (t->result[0])
1752 seq_printf(seq, "\nResult: %s\n", t->result);
1753 else
1754 seq_printf(seq, "\nResult: NA\n");
1755
1756 if_unlock(t);
1757
1758 return 0;
1759}
1760
1761static ssize_t pktgen_thread_write(struct file *file,
1762 const char __user * user_buffer,
1763 size_t count, loff_t * offset)
1764{
1765 struct seq_file *seq = file->private_data;
1766 struct pktgen_thread *t = seq->private;
1767 int i, max, len, ret;
1768 char name[40];
1769 char *pg_result;
1770
1771 if (count < 1) {
1772 // sprintf(pg_result, "Wrong command format");
1773 return -EINVAL;
1774 }
1775
1776 max = count;
1777 len = count_trail_chars(user_buffer, max);
1778 if (len < 0)
1779 return len;
1780
1781 i = len;
1782
1783 /* Read variable name */
1784
1785 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1786 if (len < 0)
1787 return len;
1788
1789 memset(name, 0, sizeof(name));
1790 if (copy_from_user(name, &user_buffer[i], len))
1791 return -EFAULT;
1792 i += len;
1793
1794 max = count - i;
1795 len = count_trail_chars(&user_buffer[i], max);
1796 if (len < 0)
1797 return len;
1798
1799 i += len;
1800
1801 if (debug)
1802 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
1803
1804 if (!t) {
1805 pr_err("ERROR: No thread\n");
1806 ret = -EINVAL;
1807 goto out;
1808 }
1809
1810 pg_result = &(t->result[0]);
1811
1812 if (!strcmp(name, "add_device")) {
1813 char f[32];
1814 memset(f, 0, 32);
1815 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1816 if (len < 0) {
1817 ret = len;
1818 goto out;
1819 }
1820 if (copy_from_user(f, &user_buffer[i], len))
1821 return -EFAULT;
1822 i += len;
1823 mutex_lock(&pktgen_thread_lock);
1824 ret = pktgen_add_device(t, f);
1825 mutex_unlock(&pktgen_thread_lock);
1826 if (!ret) {
1827 ret = count;
1828 sprintf(pg_result, "OK: add_device=%s", f);
1829 } else
1830 sprintf(pg_result, "ERROR: can not add device %s", f);
1831 goto out;
1832 }
1833
1834 if (!strcmp(name, "rem_device_all")) {
1835 mutex_lock(&pktgen_thread_lock);
1836 t->control |= T_REMDEVALL;
1837 mutex_unlock(&pktgen_thread_lock);
1838 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1839 ret = count;
1840 sprintf(pg_result, "OK: rem_device_all");
1841 goto out;
1842 }
1843
1844 if (!strcmp(name, "max_before_softirq")) {
1845 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1846 ret = count;
1847 goto out;
1848 }
1849
1850 ret = -EINVAL;
1851out:
1852 return ret;
1853}
1854
1855static int pktgen_thread_open(struct inode *inode, struct file *file)
1856{
1857 return single_open(file, pktgen_thread_show, PDE_DATA(inode));
1858}
1859
1860static const struct file_operations pktgen_thread_fops = {
1861 .owner = THIS_MODULE,
1862 .open = pktgen_thread_open,
1863 .read = seq_read,
1864 .llseek = seq_lseek,
1865 .write = pktgen_thread_write,
1866 .release = single_release,
1867};
1868
1869/* Think find or remove for NN */
1870static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn,
1871 const char *ifname, int remove)
1872{
1873 struct pktgen_thread *t;
1874 struct pktgen_dev *pkt_dev = NULL;
1875 bool exact = (remove == FIND);
1876
1877 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1878 pkt_dev = pktgen_find_dev(t, ifname, exact);
1879 if (pkt_dev) {
1880 if (remove) {
1881 if_lock(t);
1882 pkt_dev->removal_mark = 1;
1883 t->control |= T_REMDEV;
1884 if_unlock(t);
1885 }
1886 break;
1887 }
1888 }
1889 return pkt_dev;
1890}
1891
1892/*
1893 * mark a device for removal
1894 */
1895static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname)
1896{
1897 struct pktgen_dev *pkt_dev = NULL;
1898 const int max_tries = 10, msec_per_try = 125;
1899 int i = 0;
1900
1901 mutex_lock(&pktgen_thread_lock);
1902 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1903
1904 while (1) {
1905
1906 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE);
1907 if (pkt_dev == NULL)
1908 break; /* success */
1909
1910 mutex_unlock(&pktgen_thread_lock);
1911 pr_debug("%s: waiting for %s to disappear....\n",
1912 __func__, ifname);
1913 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1914 mutex_lock(&pktgen_thread_lock);
1915
1916 if (++i >= max_tries) {
1917 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1918 __func__, msec_per_try * i, ifname);
1919 break;
1920 }
1921
1922 }
1923
1924 mutex_unlock(&pktgen_thread_lock);
1925}
1926
1927static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev)
1928{
1929 struct pktgen_thread *t;
1930
1931 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1932 struct pktgen_dev *pkt_dev;
1933
1934 list_for_each_entry(pkt_dev, &t->if_list, list) {
1935 if (pkt_dev->odev != dev)
1936 continue;
1937
1938 proc_remove(pkt_dev->entry);
1939
1940 pkt_dev->entry = proc_create_data(dev->name, 0600,
1941 pn->proc_dir,
1942 &pktgen_if_fops,
1943 pkt_dev);
1944 if (!pkt_dev->entry)
1945 pr_err("can't move proc entry for '%s'\n",
1946 dev->name);
1947 break;
1948 }
1949 }
1950}
1951
1952static int pktgen_device_event(struct notifier_block *unused,
1953 unsigned long event, void *ptr)
1954{
1955 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1956 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id);
1957
1958 if (pn->pktgen_exiting)
1959 return NOTIFY_DONE;
1960
1961 /* It is OK that we do not hold the group lock right now,
1962 * as we run under the RTNL lock.
1963 */
1964
1965 switch (event) {
1966 case NETDEV_CHANGENAME:
1967 pktgen_change_name(pn, dev);
1968 break;
1969
1970 case NETDEV_UNREGISTER:
1971 pktgen_mark_device(pn, dev->name);
1972 break;
1973 }
1974
1975 return NOTIFY_DONE;
1976}
1977
1978static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn,
1979 struct pktgen_dev *pkt_dev,
1980 const char *ifname)
1981{
1982 char b[IFNAMSIZ+5];
1983 int i;
1984
1985 for (i = 0; ifname[i] != '@'; i++) {
1986 if (i == IFNAMSIZ)
1987 break;
1988
1989 b[i] = ifname[i];
1990 }
1991 b[i] = 0;
1992
1993 return dev_get_by_name(pn->net, b);
1994}
1995
1996
1997/* Associate pktgen_dev with a device. */
1998
1999static int pktgen_setup_dev(const struct pktgen_net *pn,
2000 struct pktgen_dev *pkt_dev, const char *ifname)
2001{
2002 struct net_device *odev;
2003 int err;
2004
2005 /* Clean old setups */
2006 if (pkt_dev->odev) {
2007 dev_put(pkt_dev->odev);
2008 pkt_dev->odev = NULL;
2009 }
2010
2011 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname);
2012 if (!odev) {
2013 pr_err("no such netdevice: \"%s\"\n", ifname);
2014 return -ENODEV;
2015 }
2016
2017 if (odev->type != ARPHRD_ETHER) {
2018 pr_err("not an ethernet device: \"%s\"\n", ifname);
2019 err = -EINVAL;
2020 } else if (!netif_running(odev)) {
2021 pr_err("device is down: \"%s\"\n", ifname);
2022 err = -ENETDOWN;
2023 } else {
2024 pkt_dev->odev = odev;
2025 return 0;
2026 }
2027
2028 dev_put(odev);
2029 return err;
2030}
2031
2032/* Read pkt_dev from the interface and set up internal pktgen_dev
2033 * structure to have the right information to create/send packets
2034 */
2035static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2036{
2037 int ntxq;
2038
2039 if (!pkt_dev->odev) {
2040 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2041 sprintf(pkt_dev->result,
2042 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2043 return;
2044 }
2045
2046 /* make sure that we don't pick a non-existing transmit queue */
2047 ntxq = pkt_dev->odev->real_num_tx_queues;
2048
2049 if (ntxq <= pkt_dev->queue_map_min) {
2050 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2051 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2052 pkt_dev->odevname);
2053 pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2054 }
2055 if (pkt_dev->queue_map_max >= ntxq) {
2056 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2057 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2058 pkt_dev->odevname);
2059 pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2060 }
2061
2062 /* Default to the interface's mac if not explicitly set. */
2063
2064 if (is_zero_ether_addr(pkt_dev->src_mac))
2065 ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr);
2066
2067 /* Set up Dest MAC */
2068 ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac);
2069
2070 if (pkt_dev->flags & F_IPV6) {
2071 int i, set = 0, err = 1;
2072 struct inet6_dev *idev;
2073
2074 if (pkt_dev->min_pkt_size == 0) {
2075 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
2076 + sizeof(struct udphdr)
2077 + sizeof(struct pktgen_hdr)
2078 + pkt_dev->pkt_overhead;
2079 }
2080
2081 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2082 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2083 set = 1;
2084 break;
2085 }
2086
2087 if (!set) {
2088
2089 /*
2090 * Use linklevel address if unconfigured.
2091 *
2092 * use ipv6_get_lladdr if/when it's get exported
2093 */
2094
2095 rcu_read_lock();
2096 idev = __in6_dev_get(pkt_dev->odev);
2097 if (idev) {
2098 struct inet6_ifaddr *ifp;
2099
2100 read_lock_bh(&idev->lock);
2101 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2102 if ((ifp->scope & IFA_LINK) &&
2103 !(ifp->flags & IFA_F_TENTATIVE)) {
2104 pkt_dev->cur_in6_saddr = ifp->addr;
2105 err = 0;
2106 break;
2107 }
2108 }
2109 read_unlock_bh(&idev->lock);
2110 }
2111 rcu_read_unlock();
2112 if (err)
2113 pr_err("ERROR: IPv6 link address not available\n");
2114 }
2115 } else {
2116 if (pkt_dev->min_pkt_size == 0) {
2117 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
2118 + sizeof(struct udphdr)
2119 + sizeof(struct pktgen_hdr)
2120 + pkt_dev->pkt_overhead;
2121 }
2122
2123 pkt_dev->saddr_min = 0;
2124 pkt_dev->saddr_max = 0;
2125 if (strlen(pkt_dev->src_min) == 0) {
2126
2127 struct in_device *in_dev;
2128
2129 rcu_read_lock();
2130 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2131 if (in_dev) {
2132 if (in_dev->ifa_list) {
2133 pkt_dev->saddr_min =
2134 in_dev->ifa_list->ifa_address;
2135 pkt_dev->saddr_max = pkt_dev->saddr_min;
2136 }
2137 }
2138 rcu_read_unlock();
2139 } else {
2140 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2141 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2142 }
2143
2144 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2145 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2146 }
2147 /* Initialize current values. */
2148 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2149 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
2150 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
2151
2152 pkt_dev->cur_dst_mac_offset = 0;
2153 pkt_dev->cur_src_mac_offset = 0;
2154 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2155 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2156 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2157 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2158 pkt_dev->nflows = 0;
2159}
2160
2161
2162static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2163{
2164 ktime_t start_time, end_time;
2165 s64 remaining;
2166 struct hrtimer_sleeper t;
2167
2168 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2169 hrtimer_set_expires(&t.timer, spin_until);
2170
2171 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2172 if (remaining <= 0) {
2173 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2174 return;
2175 }
2176
2177 start_time = ktime_get();
2178 if (remaining < 100000) {
2179 /* for small delays (<100us), just loop until limit is reached */
2180 do {
2181 end_time = ktime_get();
2182 } while (ktime_compare(end_time, spin_until) < 0);
2183 } else {
2184 /* see do_nanosleep */
2185 hrtimer_init_sleeper(&t, current);
2186 do {
2187 set_current_state(TASK_INTERRUPTIBLE);
2188 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2189 if (!hrtimer_active(&t.timer))
2190 t.task = NULL;
2191
2192 if (likely(t.task))
2193 schedule();
2194
2195 hrtimer_cancel(&t.timer);
2196 } while (t.task && pkt_dev->running && !signal_pending(current));
2197 __set_current_state(TASK_RUNNING);
2198 end_time = ktime_get();
2199 }
2200
2201 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2202 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2203}
2204
2205static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2206{
2207 pkt_dev->pkt_overhead = 0;
2208 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2209 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2210 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2211}
2212
2213static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2214{
2215 return !!(pkt_dev->flows[flow].flags & F_INIT);
2216}
2217
2218static inline int f_pick(struct pktgen_dev *pkt_dev)
2219{
2220 int flow = pkt_dev->curfl;
2221
2222 if (pkt_dev->flags & F_FLOW_SEQ) {
2223 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2224 /* reset time */
2225 pkt_dev->flows[flow].count = 0;
2226 pkt_dev->flows[flow].flags = 0;
2227 pkt_dev->curfl += 1;
2228 if (pkt_dev->curfl >= pkt_dev->cflows)
2229 pkt_dev->curfl = 0; /*reset */
2230 }
2231 } else {
2232 flow = prandom_u32() % pkt_dev->cflows;
2233 pkt_dev->curfl = flow;
2234
2235 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2236 pkt_dev->flows[flow].count = 0;
2237 pkt_dev->flows[flow].flags = 0;
2238 }
2239 }
2240
2241 return pkt_dev->curfl;
2242}
2243
2244
2245#ifdef CONFIG_XFRM
2246/* If there was already an IPSEC SA, we keep it as is, else
2247 * we go look for it ...
2248*/
2249#define DUMMY_MARK 0
2250static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2251{
2252 struct xfrm_state *x = pkt_dev->flows[flow].x;
2253 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
2254 if (!x) {
2255
2256 if (pkt_dev->spi) {
2257 /* We need as quick as possible to find the right SA
2258 * Searching with minimum criteria to archieve this.
2259 */
2260 x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET);
2261 } else {
2262 /* slow path: we dont already have xfrm_state */
2263 x = xfrm_stateonly_find(pn->net, DUMMY_MARK,
2264 (xfrm_address_t *)&pkt_dev->cur_daddr,
2265 (xfrm_address_t *)&pkt_dev->cur_saddr,
2266 AF_INET,
2267 pkt_dev->ipsmode,
2268 pkt_dev->ipsproto, 0);
2269 }
2270 if (x) {
2271 pkt_dev->flows[flow].x = x;
2272 set_pkt_overhead(pkt_dev);
2273 pkt_dev->pkt_overhead += x->props.header_len;
2274 }
2275
2276 }
2277}
2278#endif
2279static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2280{
2281
2282 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2283 pkt_dev->cur_queue_map = smp_processor_id();
2284
2285 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2286 __u16 t;
2287 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2288 t = prandom_u32() %
2289 (pkt_dev->queue_map_max -
2290 pkt_dev->queue_map_min + 1)
2291 + pkt_dev->queue_map_min;
2292 } else {
2293 t = pkt_dev->cur_queue_map + 1;
2294 if (t > pkt_dev->queue_map_max)
2295 t = pkt_dev->queue_map_min;
2296 }
2297 pkt_dev->cur_queue_map = t;
2298 }
2299 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2300}
2301
2302/* Increment/randomize headers according to flags and current values
2303 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2304 */
2305static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2306{
2307 __u32 imn;
2308 __u32 imx;
2309 int flow = 0;
2310
2311 if (pkt_dev->cflows)
2312 flow = f_pick(pkt_dev);
2313
2314 /* Deal with source MAC */
2315 if (pkt_dev->src_mac_count > 1) {
2316 __u32 mc;
2317 __u32 tmp;
2318
2319 if (pkt_dev->flags & F_MACSRC_RND)
2320 mc = prandom_u32() % pkt_dev->src_mac_count;
2321 else {
2322 mc = pkt_dev->cur_src_mac_offset++;
2323 if (pkt_dev->cur_src_mac_offset >=
2324 pkt_dev->src_mac_count)
2325 pkt_dev->cur_src_mac_offset = 0;
2326 }
2327
2328 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2329 pkt_dev->hh[11] = tmp;
2330 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2331 pkt_dev->hh[10] = tmp;
2332 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2333 pkt_dev->hh[9] = tmp;
2334 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2335 pkt_dev->hh[8] = tmp;
2336 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2337 pkt_dev->hh[7] = tmp;
2338 }
2339
2340 /* Deal with Destination MAC */
2341 if (pkt_dev->dst_mac_count > 1) {
2342 __u32 mc;
2343 __u32 tmp;
2344
2345 if (pkt_dev->flags & F_MACDST_RND)
2346 mc = prandom_u32() % pkt_dev->dst_mac_count;
2347
2348 else {
2349 mc = pkt_dev->cur_dst_mac_offset++;
2350 if (pkt_dev->cur_dst_mac_offset >=
2351 pkt_dev->dst_mac_count) {
2352 pkt_dev->cur_dst_mac_offset = 0;
2353 }
2354 }
2355
2356 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2357 pkt_dev->hh[5] = tmp;
2358 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2359 pkt_dev->hh[4] = tmp;
2360 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2361 pkt_dev->hh[3] = tmp;
2362 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2363 pkt_dev->hh[2] = tmp;
2364 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2365 pkt_dev->hh[1] = tmp;
2366 }
2367
2368 if (pkt_dev->flags & F_MPLS_RND) {
2369 unsigned int i;
2370 for (i = 0; i < pkt_dev->nr_labels; i++)
2371 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2372 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2373 ((__force __be32)prandom_u32() &
2374 htonl(0x000fffff));
2375 }
2376
2377 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2378 pkt_dev->vlan_id = prandom_u32() & (4096 - 1);
2379 }
2380
2381 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2382 pkt_dev->svlan_id = prandom_u32() & (4096 - 1);
2383 }
2384
2385 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2386 if (pkt_dev->flags & F_UDPSRC_RND)
2387 pkt_dev->cur_udp_src = prandom_u32() %
2388 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2389 + pkt_dev->udp_src_min;
2390
2391 else {
2392 pkt_dev->cur_udp_src++;
2393 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2394 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2395 }
2396 }
2397
2398 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2399 if (pkt_dev->flags & F_UDPDST_RND) {
2400 pkt_dev->cur_udp_dst = prandom_u32() %
2401 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2402 + pkt_dev->udp_dst_min;
2403 } else {
2404 pkt_dev->cur_udp_dst++;
2405 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2406 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2407 }
2408 }
2409
2410 if (!(pkt_dev->flags & F_IPV6)) {
2411
2412 imn = ntohl(pkt_dev->saddr_min);
2413 imx = ntohl(pkt_dev->saddr_max);
2414 if (imn < imx) {
2415 __u32 t;
2416 if (pkt_dev->flags & F_IPSRC_RND)
2417 t = prandom_u32() % (imx - imn) + imn;
2418 else {
2419 t = ntohl(pkt_dev->cur_saddr);
2420 t++;
2421 if (t > imx)
2422 t = imn;
2423
2424 }
2425 pkt_dev->cur_saddr = htonl(t);
2426 }
2427
2428 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2429 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2430 } else {
2431 imn = ntohl(pkt_dev->daddr_min);
2432 imx = ntohl(pkt_dev->daddr_max);
2433 if (imn < imx) {
2434 __u32 t;
2435 __be32 s;
2436 if (pkt_dev->flags & F_IPDST_RND) {
2437
2438 do {
2439 t = prandom_u32() %
2440 (imx - imn) + imn;
2441 s = htonl(t);
2442 } while (ipv4_is_loopback(s) ||
2443 ipv4_is_multicast(s) ||
2444 ipv4_is_lbcast(s) ||
2445 ipv4_is_zeronet(s) ||
2446 ipv4_is_local_multicast(s));
2447 pkt_dev->cur_daddr = s;
2448 } else {
2449 t = ntohl(pkt_dev->cur_daddr);
2450 t++;
2451 if (t > imx) {
2452 t = imn;
2453 }
2454 pkt_dev->cur_daddr = htonl(t);
2455 }
2456 }
2457 if (pkt_dev->cflows) {
2458 pkt_dev->flows[flow].flags |= F_INIT;
2459 pkt_dev->flows[flow].cur_daddr =
2460 pkt_dev->cur_daddr;
2461#ifdef CONFIG_XFRM
2462 if (pkt_dev->flags & F_IPSEC_ON)
2463 get_ipsec_sa(pkt_dev, flow);
2464#endif
2465 pkt_dev->nflows++;
2466 }
2467 }
2468 } else { /* IPV6 * */
2469
2470 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
2471 int i;
2472
2473 /* Only random destinations yet */
2474
2475 for (i = 0; i < 4; i++) {
2476 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2477 (((__force __be32)prandom_u32() |
2478 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2479 pkt_dev->max_in6_daddr.s6_addr32[i]);
2480 }
2481 }
2482 }
2483
2484 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2485 __u32 t;
2486 if (pkt_dev->flags & F_TXSIZE_RND) {
2487 t = prandom_u32() %
2488 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2489 + pkt_dev->min_pkt_size;
2490 } else {
2491 t = pkt_dev->cur_pkt_size + 1;
2492 if (t > pkt_dev->max_pkt_size)
2493 t = pkt_dev->min_pkt_size;
2494 }
2495 pkt_dev->cur_pkt_size = t;
2496 }
2497
2498 set_cur_queue_map(pkt_dev);
2499
2500 pkt_dev->flows[flow].count++;
2501}
2502
2503
2504#ifdef CONFIG_XFRM
2505static u32 pktgen_dst_metrics[RTAX_MAX + 1] = {
2506
2507 [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */
2508};
2509
2510static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2511{
2512 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2513 int err = 0;
2514 struct net *net = dev_net(pkt_dev->odev);
2515
2516 if (!x)
2517 return 0;
2518 /* XXX: we dont support tunnel mode for now until
2519 * we resolve the dst issue */
2520 if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0))
2521 return 0;
2522
2523 /* But when user specify an valid SPI, transformation
2524 * supports both transport/tunnel mode + ESP/AH type.
2525 */
2526 if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0))
2527 skb->_skb_refdst = (unsigned long)&pkt_dev->dst | SKB_DST_NOREF;
2528
2529 rcu_read_lock_bh();
2530 err = x->outer_mode->output(x, skb);
2531 rcu_read_unlock_bh();
2532 if (err) {
2533 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR);
2534 goto error;
2535 }
2536 err = x->type->output(x, skb);
2537 if (err) {
2538 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR);
2539 goto error;
2540 }
2541 spin_lock_bh(&x->lock);
2542 x->curlft.bytes += skb->len;
2543 x->curlft.packets++;
2544 spin_unlock_bh(&x->lock);
2545error:
2546 return err;
2547}
2548
2549static void free_SAs(struct pktgen_dev *pkt_dev)
2550{
2551 if (pkt_dev->cflows) {
2552 /* let go of the SAs if we have them */
2553 int i;
2554 for (i = 0; i < pkt_dev->cflows; i++) {
2555 struct xfrm_state *x = pkt_dev->flows[i].x;
2556 if (x) {
2557 xfrm_state_put(x);
2558 pkt_dev->flows[i].x = NULL;
2559 }
2560 }
2561 }
2562}
2563
2564static int process_ipsec(struct pktgen_dev *pkt_dev,
2565 struct sk_buff *skb, __be16 protocol)
2566{
2567 if (pkt_dev->flags & F_IPSEC_ON) {
2568 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2569 int nhead = 0;
2570 if (x) {
2571 int ret;
2572 __u8 *eth;
2573 struct iphdr *iph;
2574
2575 nhead = x->props.header_len - skb_headroom(skb);
2576 if (nhead > 0) {
2577 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2578 if (ret < 0) {
2579 pr_err("Error expanding ipsec packet %d\n",
2580 ret);
2581 goto err;
2582 }
2583 }
2584
2585 /* ipsec is not expecting ll header */
2586 skb_pull(skb, ETH_HLEN);
2587 ret = pktgen_output_ipsec(skb, pkt_dev);
2588 if (ret) {
2589 pr_err("Error creating ipsec packet %d\n", ret);
2590 goto err;
2591 }
2592 /* restore ll */
2593 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2594 memcpy(eth, pkt_dev->hh, 12);
2595 *(u16 *) ð[12] = protocol;
2596
2597 /* Update IPv4 header len as well as checksum value */
2598 iph = ip_hdr(skb);
2599 iph->tot_len = htons(skb->len - ETH_HLEN);
2600 ip_send_check(iph);
2601 }
2602 }
2603 return 1;
2604err:
2605 kfree_skb(skb);
2606 return 0;
2607}
2608#endif
2609
2610static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2611{
2612 unsigned int i;
2613 for (i = 0; i < pkt_dev->nr_labels; i++)
2614 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2615
2616 mpls--;
2617 *mpls |= MPLS_STACK_BOTTOM;
2618}
2619
2620static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2621 unsigned int prio)
2622{
2623 return htons(id | (cfi << 12) | (prio << 13));
2624}
2625
2626static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2627 int datalen)
2628{
2629 struct timeval timestamp;
2630 struct pktgen_hdr *pgh;
2631
2632 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
2633 datalen -= sizeof(*pgh);
2634
2635 if (pkt_dev->nfrags <= 0) {
2636 memset(skb_put(skb, datalen), 0, datalen);
2637 } else {
2638 int frags = pkt_dev->nfrags;
2639 int i, len;
2640 int frag_len;
2641
2642
2643 if (frags > MAX_SKB_FRAGS)
2644 frags = MAX_SKB_FRAGS;
2645 len = datalen - frags * PAGE_SIZE;
2646 if (len > 0) {
2647 memset(skb_put(skb, len), 0, len);
2648 datalen = frags * PAGE_SIZE;
2649 }
2650
2651 i = 0;
2652 frag_len = (datalen/frags) < PAGE_SIZE ?
2653 (datalen/frags) : PAGE_SIZE;
2654 while (datalen > 0) {
2655 if (unlikely(!pkt_dev->page)) {
2656 int node = numa_node_id();
2657
2658 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2659 node = pkt_dev->node;
2660 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2661 if (!pkt_dev->page)
2662 break;
2663 }
2664 get_page(pkt_dev->page);
2665 skb_frag_set_page(skb, i, pkt_dev->page);
2666 skb_shinfo(skb)->frags[i].page_offset = 0;
2667 /*last fragment, fill rest of data*/
2668 if (i == (frags - 1))
2669 skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2670 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2671 else
2672 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2673 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2674 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2675 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2676 i++;
2677 skb_shinfo(skb)->nr_frags = i;
2678 }
2679 }
2680
2681 /* Stamp the time, and sequence number,
2682 * convert them to network byte order
2683 */
2684 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2685 pgh->seq_num = htonl(pkt_dev->seq_num);
2686
2687 do_gettimeofday(×tamp);
2688 pgh->tv_sec = htonl(timestamp.tv_sec);
2689 pgh->tv_usec = htonl(timestamp.tv_usec);
2690}
2691
2692static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
2693 struct pktgen_dev *pkt_dev,
2694 unsigned int extralen)
2695{
2696 struct sk_buff *skb = NULL;
2697 unsigned int size = pkt_dev->cur_pkt_size + 64 + extralen +
2698 pkt_dev->pkt_overhead;
2699
2700 if (pkt_dev->flags & F_NODE) {
2701 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id();
2702
2703 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node);
2704 if (likely(skb)) {
2705 skb_reserve(skb, NET_SKB_PAD);
2706 skb->dev = dev;
2707 }
2708 } else {
2709 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
2710 }
2711
2712 return skb;
2713}
2714
2715static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2716 struct pktgen_dev *pkt_dev)
2717{
2718 struct sk_buff *skb = NULL;
2719 __u8 *eth;
2720 struct udphdr *udph;
2721 int datalen, iplen;
2722 struct iphdr *iph;
2723 __be16 protocol = htons(ETH_P_IP);
2724 __be32 *mpls;
2725 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2726 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2727 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2728 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2729 u16 queue_map;
2730
2731 if (pkt_dev->nr_labels)
2732 protocol = htons(ETH_P_MPLS_UC);
2733
2734 if (pkt_dev->vlan_id != 0xffff)
2735 protocol = htons(ETH_P_8021Q);
2736
2737 /* Update any of the values, used when we're incrementing various
2738 * fields.
2739 */
2740 mod_cur_headers(pkt_dev);
2741 queue_map = pkt_dev->cur_queue_map;
2742
2743 datalen = (odev->hard_header_len + 16) & ~0xf;
2744
2745 skb = pktgen_alloc_skb(odev, pkt_dev, datalen);
2746 if (!skb) {
2747 sprintf(pkt_dev->result, "No memory");
2748 return NULL;
2749 }
2750
2751 prefetchw(skb->data);
2752 skb_reserve(skb, datalen);
2753
2754 /* Reserve for ethernet and IP header */
2755 eth = (__u8 *) skb_push(skb, 14);
2756 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2757 if (pkt_dev->nr_labels)
2758 mpls_push(mpls, pkt_dev);
2759
2760 if (pkt_dev->vlan_id != 0xffff) {
2761 if (pkt_dev->svlan_id != 0xffff) {
2762 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2763 *svlan_tci = build_tci(pkt_dev->svlan_id,
2764 pkt_dev->svlan_cfi,
2765 pkt_dev->svlan_p);
2766 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2767 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2768 }
2769 vlan_tci = (__be16 *)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 = (__be16 *)skb_put(skb, sizeof(__be16));
2774 *vlan_encapsulated_proto = htons(ETH_P_IP);
2775 }
2776
2777 skb_set_mac_header(skb, 0);
2778 skb_set_network_header(skb, skb->len);
2779 iph = (struct iphdr *) skb_put(skb, sizeof(struct iphdr));
2780
2781 skb_set_transport_header(skb, skb->len);
2782 udph = (struct udphdr *) 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 if (!(pkt_dev->flags & F_UDPCSUM)) {
2818 skb->ip_summed = CHECKSUM_NONE;
2819 } else if (odev->features & NETIF_F_V4_CSUM) {
2820 skb->ip_summed = CHECKSUM_PARTIAL;
2821 skb->csum = 0;
2822 udp4_hwcsum(skb, udph->source, udph->dest);
2823 } else {
2824 __wsum csum = udp_csum(skb);
2825
2826 /* add protocol-dependent pseudo-header */
2827 udph->check = csum_tcpudp_magic(udph->source, udph->dest,
2828 datalen + 8, IPPROTO_UDP, csum);
2829
2830 if (udph->check == 0)
2831 udph->check = CSUM_MANGLED_0;
2832 }
2833
2834 pktgen_finalize_skb(pkt_dev, skb, datalen);
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, 16);
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 = (__u8 *) skb_push(skb, 14);
2883 mpls = (__be32 *)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 = (__be16 *)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 = (__be16 *)skb_put(skb, sizeof(__be16));
2894 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2895 }
2896 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2897 *vlan_tci = build_tci(pkt_dev->vlan_id,
2898 pkt_dev->vlan_cfi,
2899 pkt_dev->vlan_p);
2900 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2901 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2902 }
2903
2904 skb_set_mac_header(skb, 0);
2905 skb_set_network_header(skb, skb->len);
2906 iph = (struct ipv6hdr *) skb_put(skb, sizeof(struct ipv6hdr));
2907
2908 skb_set_transport_header(skb, skb->len);
2909 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2910 skb_set_queue_mapping(skb, queue_map);
2911 skb->priority = pkt_dev->skb_priority;
2912
2913 memcpy(eth, pkt_dev->hh, 12);
2914 *(__be16 *) ð[12] = protocol;
2915
2916 /* Eth + IPh + UDPh + mpls */
2917 datalen = pkt_dev->cur_pkt_size - 14 -
2918 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2919 pkt_dev->pkt_overhead;
2920
2921 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
2922 datalen = sizeof(struct pktgen_hdr);
2923 net_info_ratelimited("increased datalen to %d\n", datalen);
2924 }
2925
2926 udplen = datalen + sizeof(struct udphdr);
2927 udph->source = htons(pkt_dev->cur_udp_src);
2928 udph->dest = htons(pkt_dev->cur_udp_dst);
2929 udph->len = htons(udplen);
2930 udph->check = 0;
2931
2932 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2933
2934 if (pkt_dev->traffic_class) {
2935 /* Version + traffic class + flow (0) */
2936 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2937 }
2938
2939 iph->hop_limit = 32;
2940
2941 iph->payload_len = htons(udplen);
2942 iph->nexthdr = IPPROTO_UDP;
2943
2944 iph->daddr = pkt_dev->cur_in6_daddr;
2945 iph->saddr = pkt_dev->cur_in6_saddr;
2946
2947 skb->protocol = protocol;
2948 skb->dev = odev;
2949 skb->pkt_type = PACKET_HOST;
2950
2951 if (!(pkt_dev->flags & F_UDPCSUM)) {
2952 skb->ip_summed = CHECKSUM_NONE;
2953 } else if (odev->features & NETIF_F_V6_CSUM) {
2954 skb->ip_summed = CHECKSUM_PARTIAL;
2955 skb->csum_start = skb_transport_header(skb) - skb->head;
2956 skb->csum_offset = offsetof(struct udphdr, check);
2957 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0);
2958 } else {
2959 __wsum csum = udp_csum(skb);
2960
2961 /* add protocol-dependent pseudo-header */
2962 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum);
2963
2964 if (udph->check == 0)
2965 udph->check = CSUM_MANGLED_0;
2966 }
2967
2968 pktgen_finalize_skb(pkt_dev, skb, datalen);
2969
2970 return skb;
2971}
2972
2973static struct sk_buff *fill_packet(struct net_device *odev,
2974 struct pktgen_dev *pkt_dev)
2975{
2976 if (pkt_dev->flags & F_IPV6)
2977 return fill_packet_ipv6(odev, pkt_dev);
2978 else
2979 return fill_packet_ipv4(odev, pkt_dev);
2980}
2981
2982static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2983{
2984 pkt_dev->seq_num = 1;
2985 pkt_dev->idle_acc = 0;
2986 pkt_dev->sofar = 0;
2987 pkt_dev->tx_bytes = 0;
2988 pkt_dev->errors = 0;
2989}
2990
2991/* Set up structure for sending pkts, clear counters */
2992
2993static void pktgen_run(struct pktgen_thread *t)
2994{
2995 struct pktgen_dev *pkt_dev;
2996 int started = 0;
2997
2998 func_enter();
2999
3000 if_lock(t);
3001 list_for_each_entry(pkt_dev, &t->if_list, list) {
3002
3003 /*
3004 * setup odev and create initial packet.
3005 */
3006 pktgen_setup_inject(pkt_dev);
3007
3008 if (pkt_dev->odev) {
3009 pktgen_clear_counters(pkt_dev);
3010 pkt_dev->running = 1; /* Cranke yeself! */
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 started++;
3018 } else
3019 strcpy(pkt_dev->result, "Error starting");
3020 }
3021 if_unlock(t);
3022 if (started)
3023 t->control &= ~(T_STOP);
3024}
3025
3026static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn)
3027{
3028 struct pktgen_thread *t;
3029
3030 func_enter();
3031
3032 mutex_lock(&pktgen_thread_lock);
3033
3034 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3035 t->control |= T_STOP;
3036
3037 mutex_unlock(&pktgen_thread_lock);
3038}
3039
3040static int thread_is_running(const struct pktgen_thread *t)
3041{
3042 const struct pktgen_dev *pkt_dev;
3043
3044 list_for_each_entry(pkt_dev, &t->if_list, list)
3045 if (pkt_dev->running)
3046 return 1;
3047 return 0;
3048}
3049
3050static int pktgen_wait_thread_run(struct pktgen_thread *t)
3051{
3052 if_lock(t);
3053
3054 while (thread_is_running(t)) {
3055
3056 if_unlock(t);
3057
3058 msleep_interruptible(100);
3059
3060 if (signal_pending(current))
3061 goto signal;
3062 if_lock(t);
3063 }
3064 if_unlock(t);
3065 return 1;
3066signal:
3067 return 0;
3068}
3069
3070static int pktgen_wait_all_threads_run(struct pktgen_net *pn)
3071{
3072 struct pktgen_thread *t;
3073 int sig = 1;
3074
3075 mutex_lock(&pktgen_thread_lock);
3076
3077 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
3078 sig = pktgen_wait_thread_run(t);
3079 if (sig == 0)
3080 break;
3081 }
3082
3083 if (sig == 0)
3084 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3085 t->control |= (T_STOP);
3086
3087 mutex_unlock(&pktgen_thread_lock);
3088 return sig;
3089}
3090
3091static void pktgen_run_all_threads(struct pktgen_net *pn)
3092{
3093 struct pktgen_thread *t;
3094
3095 func_enter();
3096
3097 mutex_lock(&pktgen_thread_lock);
3098
3099 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3100 t->control |= (T_RUN);
3101
3102 mutex_unlock(&pktgen_thread_lock);
3103
3104 /* Propagate thread->control */
3105 schedule_timeout_interruptible(msecs_to_jiffies(125));
3106
3107 pktgen_wait_all_threads_run(pn);
3108}
3109
3110static void pktgen_reset_all_threads(struct pktgen_net *pn)
3111{
3112 struct pktgen_thread *t;
3113
3114 func_enter();
3115
3116 mutex_lock(&pktgen_thread_lock);
3117
3118 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3119 t->control |= (T_REMDEVALL);
3120
3121 mutex_unlock(&pktgen_thread_lock);
3122
3123 /* Propagate thread->control */
3124 schedule_timeout_interruptible(msecs_to_jiffies(125));
3125
3126 pktgen_wait_all_threads_run(pn);
3127}
3128
3129static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3130{
3131 __u64 bps, mbps, pps;
3132 char *p = pkt_dev->result;
3133 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3134 pkt_dev->started_at);
3135 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3136
3137 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3138 (unsigned long long)ktime_to_us(elapsed),
3139 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3140 (unsigned long long)ktime_to_us(idle),
3141 (unsigned long long)pkt_dev->sofar,
3142 pkt_dev->cur_pkt_size, nr_frags);
3143
3144 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3145 ktime_to_ns(elapsed));
3146
3147 bps = pps * 8 * pkt_dev->cur_pkt_size;
3148
3149 mbps = bps;
3150 do_div(mbps, 1000000);
3151 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3152 (unsigned long long)pps,
3153 (unsigned long long)mbps,
3154 (unsigned long long)bps,
3155 (unsigned long long)pkt_dev->errors);
3156}
3157
3158/* Set stopped-at timer, remove from running list, do counters & statistics */
3159static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3160{
3161 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3162
3163 if (!pkt_dev->running) {
3164 pr_warning("interface: %s is already stopped\n",
3165 pkt_dev->odevname);
3166 return -EINVAL;
3167 }
3168
3169 kfree_skb(pkt_dev->skb);
3170 pkt_dev->skb = NULL;
3171 pkt_dev->stopped_at = ktime_get();
3172 pkt_dev->running = 0;
3173
3174 show_results(pkt_dev, nr_frags);
3175
3176 return 0;
3177}
3178
3179static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3180{
3181 struct pktgen_dev *pkt_dev, *best = NULL;
3182
3183 if_lock(t);
3184
3185 list_for_each_entry(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 if_unlock(t);
3194 return best;
3195}
3196
3197static void pktgen_stop(struct pktgen_thread *t)
3198{
3199 struct pktgen_dev *pkt_dev;
3200
3201 func_enter();
3202
3203 if_lock(t);
3204
3205 list_for_each_entry(pkt_dev, &t->if_list, list) {
3206 pktgen_stop_device(pkt_dev);
3207 }
3208
3209 if_unlock(t);
3210}
3211
3212/*
3213 * one of our devices needs to be removed - find it
3214 * and remove it
3215 */
3216static void pktgen_rem_one_if(struct pktgen_thread *t)
3217{
3218 struct list_head *q, *n;
3219 struct pktgen_dev *cur;
3220
3221 func_enter();
3222
3223 if_lock(t);
3224
3225 list_for_each_safe(q, n, &t->if_list) {
3226 cur = list_entry(q, struct pktgen_dev, list);
3227
3228 if (!cur->removal_mark)
3229 continue;
3230
3231 kfree_skb(cur->skb);
3232 cur->skb = NULL;
3233
3234 pktgen_remove_device(t, cur);
3235
3236 break;
3237 }
3238
3239 if_unlock(t);
3240}
3241
3242static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3243{
3244 struct list_head *q, *n;
3245 struct pktgen_dev *cur;
3246
3247 func_enter();
3248
3249 /* Remove all devices, free mem */
3250
3251 if_lock(t);
3252
3253 list_for_each_safe(q, n, &t->if_list) {
3254 cur = list_entry(q, struct pktgen_dev, list);
3255
3256 kfree_skb(cur->skb);
3257 cur->skb = NULL;
3258
3259 pktgen_remove_device(t, cur);
3260 }
3261
3262 if_unlock(t);
3263}
3264
3265static void pktgen_rem_thread(struct pktgen_thread *t)
3266{
3267 /* Remove from the thread list */
3268 remove_proc_entry(t->tsk->comm, t->net->proc_dir);
3269}
3270
3271static void pktgen_resched(struct pktgen_dev *pkt_dev)
3272{
3273 ktime_t idle_start = ktime_get();
3274 schedule();
3275 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3276}
3277
3278static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3279{
3280 ktime_t idle_start = ktime_get();
3281
3282 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3283 if (signal_pending(current))
3284 break;
3285
3286 if (need_resched())
3287 pktgen_resched(pkt_dev);
3288 else
3289 cpu_relax();
3290 }
3291 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3292}
3293
3294static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3295{
3296 struct net_device *odev = pkt_dev->odev;
3297 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3298 = odev->netdev_ops->ndo_start_xmit;
3299 struct netdev_queue *txq;
3300 u16 queue_map;
3301 int ret;
3302
3303 /* If device is offline, then don't send */
3304 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3305 pktgen_stop_device(pkt_dev);
3306 return;
3307 }
3308
3309 /* This is max DELAY, this has special meaning of
3310 * "never transmit"
3311 */
3312 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3313 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
3314 return;
3315 }
3316
3317 /* If no skb or clone count exhausted then get new one */
3318 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3319 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3320 /* build a new pkt */
3321 kfree_skb(pkt_dev->skb);
3322
3323 pkt_dev->skb = fill_packet(odev, pkt_dev);
3324 if (pkt_dev->skb == NULL) {
3325 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3326 schedule();
3327 pkt_dev->clone_count--; /* back out increment, OOM */
3328 return;
3329 }
3330 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3331 pkt_dev->allocated_skbs++;
3332 pkt_dev->clone_count = 0; /* reset counter */
3333 }
3334
3335 if (pkt_dev->delay && pkt_dev->last_ok)
3336 spin(pkt_dev, pkt_dev->next_tx);
3337
3338 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3339 txq = netdev_get_tx_queue(odev, queue_map);
3340
3341 local_bh_disable();
3342
3343 HARD_TX_LOCK(odev, txq, smp_processor_id());
3344
3345 if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) {
3346 ret = NETDEV_TX_BUSY;
3347 pkt_dev->last_ok = 0;
3348 goto unlock;
3349 }
3350 atomic_inc(&(pkt_dev->skb->users));
3351 ret = (*xmit)(pkt_dev->skb, odev);
3352
3353 switch (ret) {
3354 case NETDEV_TX_OK:
3355 txq_trans_update(txq);
3356 pkt_dev->last_ok = 1;
3357 pkt_dev->sofar++;
3358 pkt_dev->seq_num++;
3359 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3360 break;
3361 case NET_XMIT_DROP:
3362 case NET_XMIT_CN:
3363 case NET_XMIT_POLICED:
3364 /* skb has been consumed */
3365 pkt_dev->errors++;
3366 break;
3367 default: /* Drivers are not supposed to return other values! */
3368 net_info_ratelimited("%s xmit error: %d\n",
3369 pkt_dev->odevname, ret);
3370 pkt_dev->errors++;
3371 /* fallthru */
3372 case NETDEV_TX_LOCKED:
3373 case NETDEV_TX_BUSY:
3374 /* Retry it next time */
3375 atomic_dec(&(pkt_dev->skb->users));
3376 pkt_dev->last_ok = 0;
3377 }
3378unlock:
3379 HARD_TX_UNLOCK(odev, txq);
3380
3381 local_bh_enable();
3382
3383 /* If pkt_dev->count is zero, then run forever */
3384 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3385 pktgen_wait_for_skb(pkt_dev);
3386
3387 /* Done with this */
3388 pktgen_stop_device(pkt_dev);
3389 }
3390}
3391
3392/*
3393 * Main loop of the thread goes here
3394 */
3395
3396static int pktgen_thread_worker(void *arg)
3397{
3398 DEFINE_WAIT(wait);
3399 struct pktgen_thread *t = arg;
3400 struct pktgen_dev *pkt_dev = NULL;
3401 int cpu = t->cpu;
3402
3403 BUG_ON(smp_processor_id() != cpu);
3404
3405 init_waitqueue_head(&t->queue);
3406 complete(&t->start_done);
3407
3408 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3409
3410 set_current_state(TASK_INTERRUPTIBLE);
3411
3412 set_freezable();
3413
3414 while (!kthread_should_stop()) {
3415 pkt_dev = next_to_run(t);
3416
3417 if (unlikely(!pkt_dev && t->control == 0)) {
3418 if (t->net->pktgen_exiting)
3419 break;
3420 wait_event_interruptible_timeout(t->queue,
3421 t->control != 0,
3422 HZ/10);
3423 try_to_freeze();
3424 continue;
3425 }
3426
3427 __set_current_state(TASK_RUNNING);
3428
3429 if (likely(pkt_dev)) {
3430 pktgen_xmit(pkt_dev);
3431
3432 if (need_resched())
3433 pktgen_resched(pkt_dev);
3434 else
3435 cpu_relax();
3436 }
3437
3438 if (t->control & T_STOP) {
3439 pktgen_stop(t);
3440 t->control &= ~(T_STOP);
3441 }
3442
3443 if (t->control & T_RUN) {
3444 pktgen_run(t);
3445 t->control &= ~(T_RUN);
3446 }
3447
3448 if (t->control & T_REMDEVALL) {
3449 pktgen_rem_all_ifs(t);
3450 t->control &= ~(T_REMDEVALL);
3451 }
3452
3453 if (t->control & T_REMDEV) {
3454 pktgen_rem_one_if(t);
3455 t->control &= ~(T_REMDEV);
3456 }
3457
3458 try_to_freeze();
3459
3460 set_current_state(TASK_INTERRUPTIBLE);
3461 }
3462
3463 pr_debug("%s stopping all device\n", t->tsk->comm);
3464 pktgen_stop(t);
3465
3466 pr_debug("%s removing all device\n", t->tsk->comm);
3467 pktgen_rem_all_ifs(t);
3468
3469 pr_debug("%s removing thread\n", t->tsk->comm);
3470 pktgen_rem_thread(t);
3471
3472 /* Wait for kthread_stop */
3473 while (!kthread_should_stop()) {
3474 set_current_state(TASK_INTERRUPTIBLE);
3475 schedule();
3476 }
3477 __set_current_state(TASK_RUNNING);
3478
3479 return 0;
3480}
3481
3482static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3483 const char *ifname, bool exact)
3484{
3485 struct pktgen_dev *p, *pkt_dev = NULL;
3486 size_t len = strlen(ifname);
3487
3488 if_lock(t);
3489 list_for_each_entry(p, &t->if_list, list)
3490 if (strncmp(p->odevname, ifname, len) == 0) {
3491 if (p->odevname[len]) {
3492 if (exact || p->odevname[len] != '@')
3493 continue;
3494 }
3495 pkt_dev = p;
3496 break;
3497 }
3498
3499 if_unlock(t);
3500 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3501 return pkt_dev;
3502}
3503
3504/*
3505 * Adds a dev at front of if_list.
3506 */
3507
3508static int add_dev_to_thread(struct pktgen_thread *t,
3509 struct pktgen_dev *pkt_dev)
3510{
3511 int rv = 0;
3512
3513 if_lock(t);
3514
3515 if (pkt_dev->pg_thread) {
3516 pr_err("ERROR: already assigned to a thread\n");
3517 rv = -EBUSY;
3518 goto out;
3519 }
3520
3521 list_add(&pkt_dev->list, &t->if_list);
3522 pkt_dev->pg_thread = t;
3523 pkt_dev->running = 0;
3524
3525out:
3526 if_unlock(t);
3527 return rv;
3528}
3529
3530/* Called under thread lock */
3531
3532static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3533{
3534 struct pktgen_dev *pkt_dev;
3535 int err;
3536 int node = cpu_to_node(t->cpu);
3537
3538 /* We don't allow a device to be on several threads */
3539
3540 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND);
3541 if (pkt_dev) {
3542 pr_err("ERROR: interface already used\n");
3543 return -EBUSY;
3544 }
3545
3546 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3547 if (!pkt_dev)
3548 return -ENOMEM;
3549
3550 strcpy(pkt_dev->odevname, ifname);
3551 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3552 node);
3553 if (pkt_dev->flows == NULL) {
3554 kfree(pkt_dev);
3555 return -ENOMEM;
3556 }
3557
3558 pkt_dev->removal_mark = 0;
3559 pkt_dev->nfrags = 0;
3560 pkt_dev->delay = pg_delay_d;
3561 pkt_dev->count = pg_count_d;
3562 pkt_dev->sofar = 0;
3563 pkt_dev->udp_src_min = 9; /* sink port */
3564 pkt_dev->udp_src_max = 9;
3565 pkt_dev->udp_dst_min = 9;
3566 pkt_dev->udp_dst_max = 9;
3567 pkt_dev->vlan_p = 0;
3568 pkt_dev->vlan_cfi = 0;
3569 pkt_dev->vlan_id = 0xffff;
3570 pkt_dev->svlan_p = 0;
3571 pkt_dev->svlan_cfi = 0;
3572 pkt_dev->svlan_id = 0xffff;
3573 pkt_dev->node = -1;
3574
3575 err = pktgen_setup_dev(t->net, pkt_dev, ifname);
3576 if (err)
3577 goto out1;
3578 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3579 pkt_dev->clone_skb = pg_clone_skb_d;
3580
3581 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir,
3582 &pktgen_if_fops, pkt_dev);
3583 if (!pkt_dev->entry) {
3584 pr_err("cannot create %s/%s procfs entry\n",
3585 PG_PROC_DIR, ifname);
3586 err = -EINVAL;
3587 goto out2;
3588 }
3589#ifdef CONFIG_XFRM
3590 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3591 pkt_dev->ipsproto = IPPROTO_ESP;
3592
3593 /* xfrm tunnel mode needs additional dst to extract outter
3594 * ip header protocol/ttl/id field, here creat a phony one.
3595 * instead of looking for a valid rt, which definitely hurting
3596 * performance under such circumstance.
3597 */
3598 pkt_dev->dstops.family = AF_INET;
3599 pkt_dev->dst.dev = pkt_dev->odev;
3600 dst_init_metrics(&pkt_dev->dst, pktgen_dst_metrics, false);
3601 pkt_dev->dst.child = &pkt_dev->dst;
3602 pkt_dev->dst.ops = &pkt_dev->dstops;
3603#endif
3604
3605 return add_dev_to_thread(t, pkt_dev);
3606out2:
3607 dev_put(pkt_dev->odev);
3608out1:
3609#ifdef CONFIG_XFRM
3610 free_SAs(pkt_dev);
3611#endif
3612 vfree(pkt_dev->flows);
3613 kfree(pkt_dev);
3614 return err;
3615}
3616
3617static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
3618{
3619 struct pktgen_thread *t;
3620 struct proc_dir_entry *pe;
3621 struct task_struct *p;
3622
3623 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3624 cpu_to_node(cpu));
3625 if (!t) {
3626 pr_err("ERROR: out of memory, can't create new thread\n");
3627 return -ENOMEM;
3628 }
3629
3630 spin_lock_init(&t->if_lock);
3631 t->cpu = cpu;
3632
3633 INIT_LIST_HEAD(&t->if_list);
3634
3635 list_add_tail(&t->th_list, &pn->pktgen_threads);
3636 init_completion(&t->start_done);
3637
3638 p = kthread_create_on_node(pktgen_thread_worker,
3639 t,
3640 cpu_to_node(cpu),
3641 "kpktgend_%d", cpu);
3642 if (IS_ERR(p)) {
3643 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3644 list_del(&t->th_list);
3645 kfree(t);
3646 return PTR_ERR(p);
3647 }
3648 kthread_bind(p, cpu);
3649 t->tsk = p;
3650
3651 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
3652 &pktgen_thread_fops, t);
3653 if (!pe) {
3654 pr_err("cannot create %s/%s procfs entry\n",
3655 PG_PROC_DIR, t->tsk->comm);
3656 kthread_stop(p);
3657 list_del(&t->th_list);
3658 kfree(t);
3659 return -EINVAL;
3660 }
3661
3662 t->net = pn;
3663 wake_up_process(p);
3664 wait_for_completion(&t->start_done);
3665
3666 return 0;
3667}
3668
3669/*
3670 * Removes a device from the thread if_list.
3671 */
3672static void _rem_dev_from_if_list(struct pktgen_thread *t,
3673 struct pktgen_dev *pkt_dev)
3674{
3675 struct list_head *q, *n;
3676 struct pktgen_dev *p;
3677
3678 list_for_each_safe(q, n, &t->if_list) {
3679 p = list_entry(q, struct pktgen_dev, list);
3680 if (p == pkt_dev)
3681 list_del(&p->list);
3682 }
3683}
3684
3685static int pktgen_remove_device(struct pktgen_thread *t,
3686 struct pktgen_dev *pkt_dev)
3687{
3688 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3689
3690 if (pkt_dev->running) {
3691 pr_warning("WARNING: trying to remove a running interface, stopping it now\n");
3692 pktgen_stop_device(pkt_dev);
3693 }
3694
3695 /* Dis-associate from the interface */
3696
3697 if (pkt_dev->odev) {
3698 dev_put(pkt_dev->odev);
3699 pkt_dev->odev = NULL;
3700 }
3701
3702 /* And update the thread if_list */
3703
3704 _rem_dev_from_if_list(t, pkt_dev);
3705
3706 if (pkt_dev->entry)
3707 proc_remove(pkt_dev->entry);
3708
3709#ifdef CONFIG_XFRM
3710 free_SAs(pkt_dev);
3711#endif
3712 vfree(pkt_dev->flows);
3713 if (pkt_dev->page)
3714 put_page(pkt_dev->page);
3715 kfree(pkt_dev);
3716 return 0;
3717}
3718
3719static int __net_init pg_net_init(struct net *net)
3720{
3721 struct pktgen_net *pn = net_generic(net, pg_net_id);
3722 struct proc_dir_entry *pe;
3723 int cpu, ret = 0;
3724
3725 pn->net = net;
3726 INIT_LIST_HEAD(&pn->pktgen_threads);
3727 pn->pktgen_exiting = false;
3728 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net);
3729 if (!pn->proc_dir) {
3730 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR);
3731 return -ENODEV;
3732 }
3733 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops);
3734 if (pe == NULL) {
3735 pr_err("cannot create %s procfs entry\n", PGCTRL);
3736 ret = -EINVAL;
3737 goto remove;
3738 }
3739
3740 for_each_online_cpu(cpu) {
3741 int err;
3742
3743 err = pktgen_create_thread(cpu, pn);
3744 if (err)
3745 pr_warn("Cannot create thread for cpu %d (%d)\n",
3746 cpu, err);
3747 }
3748
3749 if (list_empty(&pn->pktgen_threads)) {
3750 pr_err("Initialization failed for all threads\n");
3751 ret = -ENODEV;
3752 goto remove_entry;
3753 }
3754
3755 return 0;
3756
3757remove_entry:
3758 remove_proc_entry(PGCTRL, pn->proc_dir);
3759remove:
3760 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3761 return ret;
3762}
3763
3764static void __net_exit pg_net_exit(struct net *net)
3765{
3766 struct pktgen_net *pn = net_generic(net, pg_net_id);
3767 struct pktgen_thread *t;
3768 struct list_head *q, *n;
3769 LIST_HEAD(list);
3770
3771 /* Stop all interfaces & threads */
3772 pn->pktgen_exiting = true;
3773
3774 mutex_lock(&pktgen_thread_lock);
3775 list_splice_init(&pn->pktgen_threads, &list);
3776 mutex_unlock(&pktgen_thread_lock);
3777
3778 list_for_each_safe(q, n, &list) {
3779 t = list_entry(q, struct pktgen_thread, th_list);
3780 list_del(&t->th_list);
3781 kthread_stop(t->tsk);
3782 kfree(t);
3783 }
3784
3785 remove_proc_entry(PGCTRL, pn->proc_dir);
3786 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3787}
3788
3789static struct pernet_operations pg_net_ops = {
3790 .init = pg_net_init,
3791 .exit = pg_net_exit,
3792 .id = &pg_net_id,
3793 .size = sizeof(struct pktgen_net),
3794};
3795
3796static int __init pg_init(void)
3797{
3798 int ret = 0;
3799
3800 pr_info("%s", version);
3801 ret = register_pernet_subsys(&pg_net_ops);
3802 if (ret)
3803 return ret;
3804 ret = register_netdevice_notifier(&pktgen_notifier_block);
3805 if (ret)
3806 unregister_pernet_subsys(&pg_net_ops);
3807
3808 return ret;
3809}
3810
3811static void __exit pg_cleanup(void)
3812{
3813 unregister_netdevice_notifier(&pktgen_notifier_block);
3814 unregister_pernet_subsys(&pg_net_ops);
3815}
3816
3817module_init(pg_init);
3818module_exit(pg_cleanup);
3819
3820MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3821MODULE_DESCRIPTION("Packet Generator tool");
3822MODULE_LICENSE("GPL");
3823MODULE_VERSION(VERSION);
3824module_param(pg_count_d, int, 0);
3825MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3826module_param(pg_delay_d, int, 0);
3827MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3828module_param(pg_clone_skb_d, int, 0);
3829MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3830module_param(debug, int, 0);
3831MODULE_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#define PKT_FLAGS \
188 pf(IPV6) /* Interface in IPV6 Mode */ \
189 pf(IPSRC_RND) /* IP-Src Random */ \
190 pf(IPDST_RND) /* IP-Dst Random */ \
191 pf(TXSIZE_RND) /* Transmit size is random */ \
192 pf(UDPSRC_RND) /* UDP-Src Random */ \
193 pf(UDPDST_RND) /* UDP-Dst Random */ \
194 pf(UDPCSUM) /* Include UDP checksum */ \
195 pf(NO_TIMESTAMP) /* Don't timestamp packets (default TS) */ \
196 pf(MPLS_RND) /* Random MPLS labels */ \
197 pf(QUEUE_MAP_RND) /* queue map Random */ \
198 pf(QUEUE_MAP_CPU) /* queue map mirrors smp_processor_id() */ \
199 pf(FLOW_SEQ) /* Sequential flows */ \
200 pf(IPSEC) /* ipsec on for flows */ \
201 pf(MACSRC_RND) /* MAC-Src Random */ \
202 pf(MACDST_RND) /* MAC-Dst Random */ \
203 pf(VID_RND) /* Random VLAN ID */ \
204 pf(SVID_RND) /* Random SVLAN ID */ \
205 pf(NODE) /* Node memory alloc*/ \
206
207#define pf(flag) flag##_SHIFT,
208enum pkt_flags {
209 PKT_FLAGS
210};
211#undef pf
212
213/* Device flag bits */
214#define pf(flag) static const __u32 F_##flag = (1<<flag##_SHIFT);
215PKT_FLAGS
216#undef pf
217
218#define pf(flag) __stringify(flag),
219static char *pkt_flag_names[] = {
220 PKT_FLAGS
221};
222#undef pf
223
224#define NR_PKT_FLAGS ARRAY_SIZE(pkt_flag_names)
225
226/* Thread control flag bits */
227#define T_STOP (1<<0) /* Stop run */
228#define T_RUN (1<<1) /* Start run */
229#define T_REMDEVALL (1<<2) /* Remove all devs */
230#define T_REMDEV (1<<3) /* Remove one dev */
231
232/* Xmit modes */
233#define M_START_XMIT 0 /* Default normal TX */
234#define M_NETIF_RECEIVE 1 /* Inject packets into stack */
235#define M_QUEUE_XMIT 2 /* Inject packet into qdisc */
236
237/* If lock -- protects updating of if_list */
238#define if_lock(t) mutex_lock(&(t->if_lock));
239#define if_unlock(t) mutex_unlock(&(t->if_lock));
240
241/* Used to help with determining the pkts on receive */
242#define PKTGEN_MAGIC 0xbe9be955
243#define PG_PROC_DIR "pktgen"
244#define PGCTRL "pgctrl"
245
246#define MAX_CFLOWS 65536
247
248#define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
249#define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
250
251struct flow_state {
252 __be32 cur_daddr;
253 int count;
254#ifdef CONFIG_XFRM
255 struct xfrm_state *x;
256#endif
257 __u32 flags;
258};
259
260/* flow flag bits */
261#define F_INIT (1<<0) /* flow has been initialized */
262
263struct pktgen_dev {
264 /*
265 * Try to keep frequent/infrequent used vars. separated.
266 */
267 struct proc_dir_entry *entry; /* proc file */
268 struct pktgen_thread *pg_thread;/* the owner */
269 struct list_head list; /* chaining in the thread's run-queue */
270 struct rcu_head rcu; /* freed by RCU */
271
272 int running; /* if false, the test will stop */
273
274 /* If min != max, then we will either do a linear iteration, or
275 * we will do a random selection from within the range.
276 */
277 __u32 flags;
278 int xmit_mode;
279 int min_pkt_size;
280 int max_pkt_size;
281 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
282 int nfrags;
283 int removal_mark; /* non-zero => the device is marked for
284 * removal by worker thread */
285
286 struct page *page;
287 u64 delay; /* nano-seconds */
288
289 __u64 count; /* Default No packets to send */
290 __u64 sofar; /* How many pkts we've sent so far */
291 __u64 tx_bytes; /* How many bytes we've transmitted */
292 __u64 errors; /* Errors when trying to transmit, */
293
294 /* runtime counters relating to clone_skb */
295
296 __u32 clone_count;
297 int last_ok; /* Was last skb sent?
298 * Or a failed transmit of some sort?
299 * This will keep sequence numbers in order
300 */
301 ktime_t next_tx;
302 ktime_t started_at;
303 ktime_t stopped_at;
304 u64 idle_acc; /* nano-seconds */
305
306 __u32 seq_num;
307
308 int clone_skb; /*
309 * Use multiple SKBs during packet gen.
310 * If this number is greater than 1, then
311 * that many copies of the same packet will be
312 * sent before a new packet is allocated.
313 * If you want to send 1024 identical packets
314 * before creating a new packet,
315 * set clone_skb to 1024.
316 */
317
318 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
319 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
320 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
321 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
322
323 struct in6_addr in6_saddr;
324 struct in6_addr in6_daddr;
325 struct in6_addr cur_in6_daddr;
326 struct in6_addr cur_in6_saddr;
327 /* For ranges */
328 struct in6_addr min_in6_daddr;
329 struct in6_addr max_in6_daddr;
330 struct in6_addr min_in6_saddr;
331 struct in6_addr max_in6_saddr;
332
333 /* If we're doing ranges, random or incremental, then this
334 * defines the min/max for those ranges.
335 */
336 __be32 saddr_min; /* inclusive, source IP address */
337 __be32 saddr_max; /* exclusive, source IP address */
338 __be32 daddr_min; /* inclusive, dest IP address */
339 __be32 daddr_max; /* exclusive, dest IP address */
340
341 __u16 udp_src_min; /* inclusive, source UDP port */
342 __u16 udp_src_max; /* exclusive, source UDP port */
343 __u16 udp_dst_min; /* inclusive, dest UDP port */
344 __u16 udp_dst_max; /* exclusive, dest UDP port */
345
346 /* DSCP + ECN */
347 __u8 tos; /* six MSB of (former) IPv4 TOS
348 are for dscp codepoint */
349 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
350 (see RFC 3260, sec. 4) */
351
352 /* MPLS */
353 unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */
354 __be32 labels[MAX_MPLS_LABELS];
355
356 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
357 __u8 vlan_p;
358 __u8 vlan_cfi;
359 __u16 vlan_id; /* 0xffff means no vlan tag */
360
361 __u8 svlan_p;
362 __u8 svlan_cfi;
363 __u16 svlan_id; /* 0xffff means no svlan tag */
364
365 __u32 src_mac_count; /* How many MACs to iterate through */
366 __u32 dst_mac_count; /* How many MACs to iterate through */
367
368 unsigned char dst_mac[ETH_ALEN];
369 unsigned char src_mac[ETH_ALEN];
370
371 __u32 cur_dst_mac_offset;
372 __u32 cur_src_mac_offset;
373 __be32 cur_saddr;
374 __be32 cur_daddr;
375 __u16 ip_id;
376 __u16 cur_udp_dst;
377 __u16 cur_udp_src;
378 __u16 cur_queue_map;
379 __u32 cur_pkt_size;
380 __u32 last_pkt_size;
381
382 __u8 hh[14];
383 /* = {
384 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
385
386 We fill in SRC address later
387 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
388 0x08, 0x00
389 };
390 */
391 __u16 pad; /* pad out the hh struct to an even 16 bytes */
392
393 struct sk_buff *skb; /* skb we are to transmit next, used for when we
394 * are transmitting the same one multiple times
395 */
396 struct net_device *odev; /* The out-going device.
397 * Note that the device should have it's
398 * pg_info pointer pointing back to this
399 * device.
400 * Set when the user specifies the out-going
401 * device name (not when the inject is
402 * started as it used to do.)
403 */
404 char odevname[32];
405 struct flow_state *flows;
406 unsigned int cflows; /* Concurrent flows (config) */
407 unsigned int lflow; /* Flow length (config) */
408 unsigned int nflows; /* accumulated flows (stats) */
409 unsigned int curfl; /* current sequenced flow (state)*/
410
411 u16 queue_map_min;
412 u16 queue_map_max;
413 __u32 skb_priority; /* skb priority field */
414 unsigned int burst; /* number of duplicated packets to burst */
415 int node; /* Memory node */
416
417#ifdef CONFIG_XFRM
418 __u8 ipsmode; /* IPSEC mode (config) */
419 __u8 ipsproto; /* IPSEC type (config) */
420 __u32 spi;
421 struct xfrm_dst xdst;
422 struct dst_ops dstops;
423#endif
424 char result[512];
425};
426
427struct pktgen_hdr {
428 __be32 pgh_magic;
429 __be32 seq_num;
430 __be32 tv_sec;
431 __be32 tv_usec;
432};
433
434
435static unsigned int pg_net_id __read_mostly;
436
437struct pktgen_net {
438 struct net *net;
439 struct proc_dir_entry *proc_dir;
440 struct list_head pktgen_threads;
441 bool pktgen_exiting;
442};
443
444struct pktgen_thread {
445 struct mutex if_lock; /* for list of devices */
446 struct list_head if_list; /* All device here */
447 struct list_head th_list;
448 struct task_struct *tsk;
449 char result[512];
450
451 /* Field for thread to receive "posted" events terminate,
452 stop ifs etc. */
453
454 u32 control;
455 int cpu;
456
457 wait_queue_head_t queue;
458 struct completion start_done;
459 struct pktgen_net *net;
460};
461
462#define REMOVE 1
463#define FIND 0
464
465static const char version[] =
466 "Packet Generator for packet performance testing. "
467 "Version: " VERSION "\n";
468
469static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
470static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
471static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
472 const char *ifname, bool exact);
473static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
474static void pktgen_run_all_threads(struct pktgen_net *pn);
475static void pktgen_reset_all_threads(struct pktgen_net *pn);
476static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn);
477
478static void pktgen_stop(struct pktgen_thread *t);
479static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
480
481/* Module parameters, defaults. */
482static int pg_count_d __read_mostly = 1000;
483static int pg_delay_d __read_mostly;
484static int pg_clone_skb_d __read_mostly;
485static int debug __read_mostly;
486
487static DEFINE_MUTEX(pktgen_thread_lock);
488
489static struct notifier_block pktgen_notifier_block = {
490 .notifier_call = pktgen_device_event,
491};
492
493/*
494 * /proc handling functions
495 *
496 */
497
498static int pgctrl_show(struct seq_file *seq, void *v)
499{
500 seq_puts(seq, version);
501 return 0;
502}
503
504static ssize_t pgctrl_write(struct file *file, const char __user *buf,
505 size_t count, loff_t *ppos)
506{
507 char data[128];
508 struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
509
510 if (!capable(CAP_NET_ADMIN))
511 return -EPERM;
512
513 if (count == 0)
514 return -EINVAL;
515
516 if (count > sizeof(data))
517 count = sizeof(data);
518
519 if (copy_from_user(data, buf, count))
520 return -EFAULT;
521
522 data[count - 1] = 0; /* Strip trailing '\n' and terminate string */
523
524 if (!strcmp(data, "stop"))
525 pktgen_stop_all_threads_ifs(pn);
526
527 else if (!strcmp(data, "start"))
528 pktgen_run_all_threads(pn);
529
530 else if (!strcmp(data, "reset"))
531 pktgen_reset_all_threads(pn);
532
533 else
534 return -EINVAL;
535
536 return count;
537}
538
539static int pgctrl_open(struct inode *inode, struct file *file)
540{
541 return single_open(file, pgctrl_show, PDE_DATA(inode));
542}
543
544static const struct file_operations pktgen_fops = {
545 .open = pgctrl_open,
546 .read = seq_read,
547 .llseek = seq_lseek,
548 .write = pgctrl_write,
549 .release = single_release,
550};
551
552static int pktgen_if_show(struct seq_file *seq, void *v)
553{
554 const struct pktgen_dev *pkt_dev = seq->private;
555 ktime_t stopped;
556 unsigned int i;
557 u64 idle;
558
559 seq_printf(seq,
560 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
561 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
562 pkt_dev->max_pkt_size);
563
564 seq_printf(seq,
565 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
566 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
567 pkt_dev->clone_skb, pkt_dev->odevname);
568
569 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
570 pkt_dev->lflow);
571
572 seq_printf(seq,
573 " queue_map_min: %u queue_map_max: %u\n",
574 pkt_dev->queue_map_min,
575 pkt_dev->queue_map_max);
576
577 if (pkt_dev->skb_priority)
578 seq_printf(seq, " skb_priority: %u\n",
579 pkt_dev->skb_priority);
580
581 if (pkt_dev->flags & F_IPV6) {
582 seq_printf(seq,
583 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
584 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
585 &pkt_dev->in6_saddr,
586 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
587 &pkt_dev->in6_daddr,
588 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
589 } else {
590 seq_printf(seq,
591 " dst_min: %s dst_max: %s\n",
592 pkt_dev->dst_min, pkt_dev->dst_max);
593 seq_printf(seq,
594 " src_min: %s src_max: %s\n",
595 pkt_dev->src_min, pkt_dev->src_max);
596 }
597
598 seq_puts(seq, " src_mac: ");
599
600 seq_printf(seq, "%pM ",
601 is_zero_ether_addr(pkt_dev->src_mac) ?
602 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
603
604 seq_puts(seq, "dst_mac: ");
605 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
606
607 seq_printf(seq,
608 " udp_src_min: %d udp_src_max: %d"
609 " udp_dst_min: %d udp_dst_max: %d\n",
610 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
611 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
612
613 seq_printf(seq,
614 " src_mac_count: %d dst_mac_count: %d\n",
615 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
616
617 if (pkt_dev->nr_labels) {
618 seq_puts(seq, " mpls: ");
619 for (i = 0; i < pkt_dev->nr_labels; i++)
620 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
621 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
622 }
623
624 if (pkt_dev->vlan_id != 0xffff)
625 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
626 pkt_dev->vlan_id, pkt_dev->vlan_p,
627 pkt_dev->vlan_cfi);
628
629 if (pkt_dev->svlan_id != 0xffff)
630 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
631 pkt_dev->svlan_id, pkt_dev->svlan_p,
632 pkt_dev->svlan_cfi);
633
634 if (pkt_dev->tos)
635 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
636
637 if (pkt_dev->traffic_class)
638 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
639
640 if (pkt_dev->burst > 1)
641 seq_printf(seq, " burst: %d\n", pkt_dev->burst);
642
643 if (pkt_dev->node >= 0)
644 seq_printf(seq, " node: %d\n", pkt_dev->node);
645
646 if (pkt_dev->xmit_mode == M_NETIF_RECEIVE)
647 seq_puts(seq, " xmit_mode: netif_receive\n");
648 else if (pkt_dev->xmit_mode == M_QUEUE_XMIT)
649 seq_puts(seq, " xmit_mode: xmit_queue\n");
650
651 seq_puts(seq, " Flags: ");
652
653 for (i = 0; i < NR_PKT_FLAGS; i++) {
654 if (i == F_FLOW_SEQ)
655 if (!pkt_dev->cflows)
656 continue;
657
658 if (pkt_dev->flags & (1 << i))
659 seq_printf(seq, "%s ", pkt_flag_names[i]);
660 else if (i == F_FLOW_SEQ)
661 seq_puts(seq, "FLOW_RND ");
662
663#ifdef CONFIG_XFRM
664 if (i == F_IPSEC && pkt_dev->spi)
665 seq_printf(seq, "spi:%u", pkt_dev->spi);
666#endif
667 }
668
669 seq_puts(seq, "\n");
670
671 /* not really stopped, more like last-running-at */
672 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at;
673 idle = pkt_dev->idle_acc;
674 do_div(idle, NSEC_PER_USEC);
675
676 seq_printf(seq,
677 "Current:\n pkts-sofar: %llu errors: %llu\n",
678 (unsigned long long)pkt_dev->sofar,
679 (unsigned long long)pkt_dev->errors);
680
681 seq_printf(seq,
682 " started: %lluus stopped: %lluus idle: %lluus\n",
683 (unsigned long long) ktime_to_us(pkt_dev->started_at),
684 (unsigned long long) ktime_to_us(stopped),
685 (unsigned long long) idle);
686
687 seq_printf(seq,
688 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
689 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
690 pkt_dev->cur_src_mac_offset);
691
692 if (pkt_dev->flags & F_IPV6) {
693 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
694 &pkt_dev->cur_in6_saddr,
695 &pkt_dev->cur_in6_daddr);
696 } else
697 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n",
698 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
699
700 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
701 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
702
703 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
704
705 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
706
707 if (pkt_dev->result[0])
708 seq_printf(seq, "Result: %s\n", pkt_dev->result);
709 else
710 seq_puts(seq, "Result: Idle\n");
711
712 return 0;
713}
714
715
716static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
717 __u32 *num)
718{
719 int i = 0;
720 *num = 0;
721
722 for (; i < maxlen; i++) {
723 int value;
724 char c;
725 *num <<= 4;
726 if (get_user(c, &user_buffer[i]))
727 return -EFAULT;
728 value = hex_to_bin(c);
729 if (value >= 0)
730 *num |= value;
731 else
732 break;
733 }
734 return i;
735}
736
737static int count_trail_chars(const char __user * user_buffer,
738 unsigned int maxlen)
739{
740 int i;
741
742 for (i = 0; i < maxlen; i++) {
743 char c;
744 if (get_user(c, &user_buffer[i]))
745 return -EFAULT;
746 switch (c) {
747 case '\"':
748 case '\n':
749 case '\r':
750 case '\t':
751 case ' ':
752 case '=':
753 break;
754 default:
755 goto done;
756 }
757 }
758done:
759 return i;
760}
761
762static long num_arg(const char __user *user_buffer, unsigned long maxlen,
763 unsigned long *num)
764{
765 int i;
766 *num = 0;
767
768 for (i = 0; i < maxlen; i++) {
769 char c;
770 if (get_user(c, &user_buffer[i]))
771 return -EFAULT;
772 if ((c >= '0') && (c <= '9')) {
773 *num *= 10;
774 *num += c - '0';
775 } else
776 break;
777 }
778 return i;
779}
780
781static int strn_len(const char __user * user_buffer, unsigned int maxlen)
782{
783 int i;
784
785 for (i = 0; i < maxlen; i++) {
786 char c;
787 if (get_user(c, &user_buffer[i]))
788 return -EFAULT;
789 switch (c) {
790 case '\"':
791 case '\n':
792 case '\r':
793 case '\t':
794 case ' ':
795 goto done_str;
796 default:
797 break;
798 }
799 }
800done_str:
801 return i;
802}
803
804static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
805{
806 unsigned int n = 0;
807 char c;
808 ssize_t i = 0;
809 int len;
810
811 pkt_dev->nr_labels = 0;
812 do {
813 __u32 tmp;
814 len = hex32_arg(&buffer[i], 8, &tmp);
815 if (len <= 0)
816 return len;
817 pkt_dev->labels[n] = htonl(tmp);
818 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
819 pkt_dev->flags |= F_MPLS_RND;
820 i += len;
821 if (get_user(c, &buffer[i]))
822 return -EFAULT;
823 i++;
824 n++;
825 if (n >= MAX_MPLS_LABELS)
826 return -E2BIG;
827 } while (c == ',');
828
829 pkt_dev->nr_labels = n;
830 return i;
831}
832
833static __u32 pktgen_read_flag(const char *f, bool *disable)
834{
835 __u32 i;
836
837 if (f[0] == '!') {
838 *disable = true;
839 f++;
840 }
841
842 for (i = 0; i < NR_PKT_FLAGS; i++) {
843 if (!IS_ENABLED(CONFIG_XFRM) && i == IPSEC_SHIFT)
844 continue;
845
846 /* allow only disabling ipv6 flag */
847 if (!*disable && i == IPV6_SHIFT)
848 continue;
849
850 if (strcmp(f, pkt_flag_names[i]) == 0)
851 return 1 << i;
852 }
853
854 if (strcmp(f, "FLOW_RND") == 0) {
855 *disable = !*disable;
856 return F_FLOW_SEQ;
857 }
858
859 return 0;
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 + 1, 1024);
910 char *tp = strndup_user(user_buffer, copy);
911
912 if (IS_ERR(tp))
913 return PTR_ERR(tp);
914
915 pr_debug("%s,%zu buffer -:%s:-\n", name, count, tp);
916 kfree(tp);
917 }
918
919 if (!strcmp(name, "min_pkt_size")) {
920 len = num_arg(&user_buffer[i], 10, &value);
921 if (len < 0)
922 return len;
923
924 i += len;
925 if (value < 14 + 20 + 8)
926 value = 14 + 20 + 8;
927 if (value != pkt_dev->min_pkt_size) {
928 pkt_dev->min_pkt_size = value;
929 pkt_dev->cur_pkt_size = value;
930 }
931 sprintf(pg_result, "OK: min_pkt_size=%u",
932 pkt_dev->min_pkt_size);
933 return count;
934 }
935
936 if (!strcmp(name, "max_pkt_size")) {
937 len = num_arg(&user_buffer[i], 10, &value);
938 if (len < 0)
939 return len;
940
941 i += len;
942 if (value < 14 + 20 + 8)
943 value = 14 + 20 + 8;
944 if (value != pkt_dev->max_pkt_size) {
945 pkt_dev->max_pkt_size = value;
946 pkt_dev->cur_pkt_size = value;
947 }
948 sprintf(pg_result, "OK: max_pkt_size=%u",
949 pkt_dev->max_pkt_size);
950 return count;
951 }
952
953 /* Shortcut for min = max */
954
955 if (!strcmp(name, "pkt_size")) {
956 len = num_arg(&user_buffer[i], 10, &value);
957 if (len < 0)
958 return len;
959
960 i += len;
961 if (value < 14 + 20 + 8)
962 value = 14 + 20 + 8;
963 if (value != pkt_dev->min_pkt_size) {
964 pkt_dev->min_pkt_size = value;
965 pkt_dev->max_pkt_size = value;
966 pkt_dev->cur_pkt_size = value;
967 }
968 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
969 return count;
970 }
971
972 if (!strcmp(name, "debug")) {
973 len = num_arg(&user_buffer[i], 10, &value);
974 if (len < 0)
975 return len;
976
977 i += len;
978 debug = value;
979 sprintf(pg_result, "OK: debug=%u", debug);
980 return count;
981 }
982
983 if (!strcmp(name, "frags")) {
984 len = num_arg(&user_buffer[i], 10, &value);
985 if (len < 0)
986 return len;
987
988 i += len;
989 pkt_dev->nfrags = value;
990 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
991 return count;
992 }
993 if (!strcmp(name, "delay")) {
994 len = num_arg(&user_buffer[i], 10, &value);
995 if (len < 0)
996 return len;
997
998 i += len;
999 if (value == 0x7FFFFFFF)
1000 pkt_dev->delay = ULLONG_MAX;
1001 else
1002 pkt_dev->delay = (u64)value;
1003
1004 sprintf(pg_result, "OK: delay=%llu",
1005 (unsigned long long) pkt_dev->delay);
1006 return count;
1007 }
1008 if (!strcmp(name, "rate")) {
1009 len = num_arg(&user_buffer[i], 10, &value);
1010 if (len < 0)
1011 return len;
1012
1013 i += len;
1014 if (!value)
1015 return len;
1016 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
1017 if (debug)
1018 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1019
1020 sprintf(pg_result, "OK: rate=%lu", value);
1021 return count;
1022 }
1023 if (!strcmp(name, "ratep")) {
1024 len = num_arg(&user_buffer[i], 10, &value);
1025 if (len < 0)
1026 return len;
1027
1028 i += len;
1029 if (!value)
1030 return len;
1031 pkt_dev->delay = NSEC_PER_SEC/value;
1032 if (debug)
1033 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1034
1035 sprintf(pg_result, "OK: rate=%lu", value);
1036 return count;
1037 }
1038 if (!strcmp(name, "udp_src_min")) {
1039 len = num_arg(&user_buffer[i], 10, &value);
1040 if (len < 0)
1041 return len;
1042
1043 i += len;
1044 if (value != pkt_dev->udp_src_min) {
1045 pkt_dev->udp_src_min = value;
1046 pkt_dev->cur_udp_src = value;
1047 }
1048 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1049 return count;
1050 }
1051 if (!strcmp(name, "udp_dst_min")) {
1052 len = num_arg(&user_buffer[i], 10, &value);
1053 if (len < 0)
1054 return len;
1055
1056 i += len;
1057 if (value != pkt_dev->udp_dst_min) {
1058 pkt_dev->udp_dst_min = value;
1059 pkt_dev->cur_udp_dst = value;
1060 }
1061 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1062 return count;
1063 }
1064 if (!strcmp(name, "udp_src_max")) {
1065 len = num_arg(&user_buffer[i], 10, &value);
1066 if (len < 0)
1067 return len;
1068
1069 i += len;
1070 if (value != pkt_dev->udp_src_max) {
1071 pkt_dev->udp_src_max = value;
1072 pkt_dev->cur_udp_src = value;
1073 }
1074 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1075 return count;
1076 }
1077 if (!strcmp(name, "udp_dst_max")) {
1078 len = num_arg(&user_buffer[i], 10, &value);
1079 if (len < 0)
1080 return len;
1081
1082 i += len;
1083 if (value != pkt_dev->udp_dst_max) {
1084 pkt_dev->udp_dst_max = value;
1085 pkt_dev->cur_udp_dst = value;
1086 }
1087 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1088 return count;
1089 }
1090 if (!strcmp(name, "clone_skb")) {
1091 len = num_arg(&user_buffer[i], 10, &value);
1092 if (len < 0)
1093 return len;
1094 if ((value > 0) &&
1095 ((pkt_dev->xmit_mode == M_NETIF_RECEIVE) ||
1096 !(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1097 return -ENOTSUPP;
1098 i += len;
1099 pkt_dev->clone_skb = value;
1100
1101 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1102 return count;
1103 }
1104 if (!strcmp(name, "count")) {
1105 len = num_arg(&user_buffer[i], 10, &value);
1106 if (len < 0)
1107 return len;
1108
1109 i += len;
1110 pkt_dev->count = value;
1111 sprintf(pg_result, "OK: count=%llu",
1112 (unsigned long long)pkt_dev->count);
1113 return count;
1114 }
1115 if (!strcmp(name, "src_mac_count")) {
1116 len = num_arg(&user_buffer[i], 10, &value);
1117 if (len < 0)
1118 return len;
1119
1120 i += len;
1121 if (pkt_dev->src_mac_count != value) {
1122 pkt_dev->src_mac_count = value;
1123 pkt_dev->cur_src_mac_offset = 0;
1124 }
1125 sprintf(pg_result, "OK: src_mac_count=%d",
1126 pkt_dev->src_mac_count);
1127 return count;
1128 }
1129 if (!strcmp(name, "dst_mac_count")) {
1130 len = num_arg(&user_buffer[i], 10, &value);
1131 if (len < 0)
1132 return len;
1133
1134 i += len;
1135 if (pkt_dev->dst_mac_count != value) {
1136 pkt_dev->dst_mac_count = value;
1137 pkt_dev->cur_dst_mac_offset = 0;
1138 }
1139 sprintf(pg_result, "OK: dst_mac_count=%d",
1140 pkt_dev->dst_mac_count);
1141 return count;
1142 }
1143 if (!strcmp(name, "burst")) {
1144 len = num_arg(&user_buffer[i], 10, &value);
1145 if (len < 0)
1146 return len;
1147
1148 i += len;
1149 if ((value > 1) &&
1150 ((pkt_dev->xmit_mode == M_QUEUE_XMIT) ||
1151 ((pkt_dev->xmit_mode == M_START_XMIT) &&
1152 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))))
1153 return -ENOTSUPP;
1154 pkt_dev->burst = value < 1 ? 1 : value;
1155 sprintf(pg_result, "OK: burst=%d", pkt_dev->burst);
1156 return count;
1157 }
1158 if (!strcmp(name, "node")) {
1159 len = num_arg(&user_buffer[i], 10, &value);
1160 if (len < 0)
1161 return len;
1162
1163 i += len;
1164
1165 if (node_possible(value)) {
1166 pkt_dev->node = value;
1167 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1168 if (pkt_dev->page) {
1169 put_page(pkt_dev->page);
1170 pkt_dev->page = NULL;
1171 }
1172 }
1173 else
1174 sprintf(pg_result, "ERROR: node not possible");
1175 return count;
1176 }
1177 if (!strcmp(name, "xmit_mode")) {
1178 char f[32];
1179
1180 memset(f, 0, 32);
1181 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1182 if (len < 0)
1183 return len;
1184
1185 if (copy_from_user(f, &user_buffer[i], len))
1186 return -EFAULT;
1187 i += len;
1188
1189 if (strcmp(f, "start_xmit") == 0) {
1190 pkt_dev->xmit_mode = M_START_XMIT;
1191 } else if (strcmp(f, "netif_receive") == 0) {
1192 /* clone_skb set earlier, not supported in this mode */
1193 if (pkt_dev->clone_skb > 0)
1194 return -ENOTSUPP;
1195
1196 pkt_dev->xmit_mode = M_NETIF_RECEIVE;
1197
1198 /* make sure new packet is allocated every time
1199 * pktgen_xmit() is called
1200 */
1201 pkt_dev->last_ok = 1;
1202
1203 /* override clone_skb if user passed default value
1204 * at module loading time
1205 */
1206 pkt_dev->clone_skb = 0;
1207 } else if (strcmp(f, "queue_xmit") == 0) {
1208 pkt_dev->xmit_mode = M_QUEUE_XMIT;
1209 pkt_dev->last_ok = 1;
1210 } else {
1211 sprintf(pg_result,
1212 "xmit_mode -:%s:- unknown\nAvailable modes: %s",
1213 f, "start_xmit, netif_receive\n");
1214 return count;
1215 }
1216 sprintf(pg_result, "OK: xmit_mode=%s", f);
1217 return count;
1218 }
1219 if (!strcmp(name, "flag")) {
1220 __u32 flag;
1221 char f[32];
1222 bool disable = false;
1223
1224 memset(f, 0, 32);
1225 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1226 if (len < 0)
1227 return len;
1228
1229 if (copy_from_user(f, &user_buffer[i], len))
1230 return -EFAULT;
1231 i += len;
1232
1233 flag = pktgen_read_flag(f, &disable);
1234
1235 if (flag) {
1236 if (disable)
1237 pkt_dev->flags &= ~flag;
1238 else
1239 pkt_dev->flags |= flag;
1240 } else {
1241 sprintf(pg_result,
1242 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1243 f,
1244 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1245 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, "
1246 "MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, "
1247 "QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, "
1248 "NO_TIMESTAMP, "
1249#ifdef CONFIG_XFRM
1250 "IPSEC, "
1251#endif
1252 "NODE_ALLOC\n");
1253 return count;
1254 }
1255 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1256 return count;
1257 }
1258 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1259 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1260 if (len < 0)
1261 return len;
1262
1263 if (copy_from_user(buf, &user_buffer[i], len))
1264 return -EFAULT;
1265 buf[len] = 0;
1266 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1267 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1268 strncpy(pkt_dev->dst_min, buf, len);
1269 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1270 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1271 }
1272 if (debug)
1273 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
1274 i += len;
1275 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1276 return count;
1277 }
1278 if (!strcmp(name, "dst_max")) {
1279 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1280 if (len < 0)
1281 return len;
1282
1283
1284 if (copy_from_user(buf, &user_buffer[i], len))
1285 return -EFAULT;
1286
1287 buf[len] = 0;
1288 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1289 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1290 strncpy(pkt_dev->dst_max, buf, len);
1291 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1292 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1293 }
1294 if (debug)
1295 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
1296 i += len;
1297 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1298 return count;
1299 }
1300 if (!strcmp(name, "dst6")) {
1301 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1302 if (len < 0)
1303 return len;
1304
1305 pkt_dev->flags |= F_IPV6;
1306
1307 if (copy_from_user(buf, &user_buffer[i], len))
1308 return -EFAULT;
1309 buf[len] = 0;
1310
1311 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
1312 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1313
1314 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1315
1316 if (debug)
1317 pr_debug("dst6 set to: %s\n", buf);
1318
1319 i += len;
1320 sprintf(pg_result, "OK: dst6=%s", buf);
1321 return count;
1322 }
1323 if (!strcmp(name, "dst6_min")) {
1324 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1325 if (len < 0)
1326 return len;
1327
1328 pkt_dev->flags |= F_IPV6;
1329
1330 if (copy_from_user(buf, &user_buffer[i], len))
1331 return -EFAULT;
1332 buf[len] = 0;
1333
1334 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
1335 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1336
1337 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
1338 if (debug)
1339 pr_debug("dst6_min set to: %s\n", buf);
1340
1341 i += len;
1342 sprintf(pg_result, "OK: dst6_min=%s", buf);
1343 return count;
1344 }
1345 if (!strcmp(name, "dst6_max")) {
1346 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1347 if (len < 0)
1348 return len;
1349
1350 pkt_dev->flags |= F_IPV6;
1351
1352 if (copy_from_user(buf, &user_buffer[i], len))
1353 return -EFAULT;
1354 buf[len] = 0;
1355
1356 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
1357 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1358
1359 if (debug)
1360 pr_debug("dst6_max set to: %s\n", buf);
1361
1362 i += len;
1363 sprintf(pg_result, "OK: dst6_max=%s", buf);
1364 return count;
1365 }
1366 if (!strcmp(name, "src6")) {
1367 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1368 if (len < 0)
1369 return len;
1370
1371 pkt_dev->flags |= F_IPV6;
1372
1373 if (copy_from_user(buf, &user_buffer[i], len))
1374 return -EFAULT;
1375 buf[len] = 0;
1376
1377 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
1378 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1379
1380 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1381
1382 if (debug)
1383 pr_debug("src6 set to: %s\n", buf);
1384
1385 i += len;
1386 sprintf(pg_result, "OK: src6=%s", buf);
1387 return count;
1388 }
1389 if (!strcmp(name, "src_min")) {
1390 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1391 if (len < 0)
1392 return len;
1393
1394 if (copy_from_user(buf, &user_buffer[i], len))
1395 return -EFAULT;
1396 buf[len] = 0;
1397 if (strcmp(buf, pkt_dev->src_min) != 0) {
1398 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1399 strncpy(pkt_dev->src_min, buf, len);
1400 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1401 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1402 }
1403 if (debug)
1404 pr_debug("src_min set to: %s\n", pkt_dev->src_min);
1405 i += len;
1406 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1407 return count;
1408 }
1409 if (!strcmp(name, "src_max")) {
1410 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1411 if (len < 0)
1412 return len;
1413
1414 if (copy_from_user(buf, &user_buffer[i], len))
1415 return -EFAULT;
1416 buf[len] = 0;
1417 if (strcmp(buf, pkt_dev->src_max) != 0) {
1418 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1419 strncpy(pkt_dev->src_max, buf, len);
1420 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1421 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1422 }
1423 if (debug)
1424 pr_debug("src_max set to: %s\n", pkt_dev->src_max);
1425 i += len;
1426 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1427 return count;
1428 }
1429 if (!strcmp(name, "dst_mac")) {
1430 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1431 if (len < 0)
1432 return len;
1433
1434 memset(valstr, 0, sizeof(valstr));
1435 if (copy_from_user(valstr, &user_buffer[i], len))
1436 return -EFAULT;
1437
1438 if (!mac_pton(valstr, pkt_dev->dst_mac))
1439 return -EINVAL;
1440 /* Set up Dest MAC */
1441 ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac);
1442
1443 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1444 return count;
1445 }
1446 if (!strcmp(name, "src_mac")) {
1447 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1448 if (len < 0)
1449 return len;
1450
1451 memset(valstr, 0, sizeof(valstr));
1452 if (copy_from_user(valstr, &user_buffer[i], len))
1453 return -EFAULT;
1454
1455 if (!mac_pton(valstr, pkt_dev->src_mac))
1456 return -EINVAL;
1457 /* Set up Src MAC */
1458 ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac);
1459
1460 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1461 return count;
1462 }
1463
1464 if (!strcmp(name, "clear_counters")) {
1465 pktgen_clear_counters(pkt_dev);
1466 sprintf(pg_result, "OK: Clearing counters.\n");
1467 return count;
1468 }
1469
1470 if (!strcmp(name, "flows")) {
1471 len = num_arg(&user_buffer[i], 10, &value);
1472 if (len < 0)
1473 return len;
1474
1475 i += len;
1476 if (value > MAX_CFLOWS)
1477 value = MAX_CFLOWS;
1478
1479 pkt_dev->cflows = value;
1480 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1481 return count;
1482 }
1483#ifdef CONFIG_XFRM
1484 if (!strcmp(name, "spi")) {
1485 len = num_arg(&user_buffer[i], 10, &value);
1486 if (len < 0)
1487 return len;
1488
1489 i += len;
1490 pkt_dev->spi = value;
1491 sprintf(pg_result, "OK: spi=%u", pkt_dev->spi);
1492 return count;
1493 }
1494#endif
1495 if (!strcmp(name, "flowlen")) {
1496 len = num_arg(&user_buffer[i], 10, &value);
1497 if (len < 0)
1498 return len;
1499
1500 i += len;
1501 pkt_dev->lflow = value;
1502 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1503 return count;
1504 }
1505
1506 if (!strcmp(name, "queue_map_min")) {
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_min = value;
1513 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1514 return count;
1515 }
1516
1517 if (!strcmp(name, "queue_map_max")) {
1518 len = num_arg(&user_buffer[i], 5, &value);
1519 if (len < 0)
1520 return len;
1521
1522 i += len;
1523 pkt_dev->queue_map_max = value;
1524 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1525 return count;
1526 }
1527
1528 if (!strcmp(name, "mpls")) {
1529 unsigned int n, cnt;
1530
1531 len = get_labels(&user_buffer[i], pkt_dev);
1532 if (len < 0)
1533 return len;
1534 i += len;
1535 cnt = sprintf(pg_result, "OK: mpls=");
1536 for (n = 0; n < pkt_dev->nr_labels; n++)
1537 cnt += sprintf(pg_result + cnt,
1538 "%08x%s", ntohl(pkt_dev->labels[n]),
1539 n == pkt_dev->nr_labels-1 ? "" : ",");
1540
1541 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1542 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1543 pkt_dev->svlan_id = 0xffff;
1544
1545 if (debug)
1546 pr_debug("VLAN/SVLAN auto turned off\n");
1547 }
1548 return count;
1549 }
1550
1551 if (!strcmp(name, "vlan_id")) {
1552 len = num_arg(&user_buffer[i], 4, &value);
1553 if (len < 0)
1554 return len;
1555
1556 i += len;
1557 if (value <= 4095) {
1558 pkt_dev->vlan_id = value; /* turn on VLAN */
1559
1560 if (debug)
1561 pr_debug("VLAN turned on\n");
1562
1563 if (debug && pkt_dev->nr_labels)
1564 pr_debug("MPLS auto turned off\n");
1565
1566 pkt_dev->nr_labels = 0; /* turn off MPLS */
1567 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1568 } else {
1569 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1570 pkt_dev->svlan_id = 0xffff;
1571
1572 if (debug)
1573 pr_debug("VLAN/SVLAN turned off\n");
1574 }
1575 return count;
1576 }
1577
1578 if (!strcmp(name, "vlan_p")) {
1579 len = num_arg(&user_buffer[i], 1, &value);
1580 if (len < 0)
1581 return len;
1582
1583 i += len;
1584 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1585 pkt_dev->vlan_p = value;
1586 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1587 } else {
1588 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1589 }
1590 return count;
1591 }
1592
1593 if (!strcmp(name, "vlan_cfi")) {
1594 len = num_arg(&user_buffer[i], 1, &value);
1595 if (len < 0)
1596 return len;
1597
1598 i += len;
1599 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1600 pkt_dev->vlan_cfi = value;
1601 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1602 } else {
1603 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1604 }
1605 return count;
1606 }
1607
1608 if (!strcmp(name, "svlan_id")) {
1609 len = num_arg(&user_buffer[i], 4, &value);
1610 if (len < 0)
1611 return len;
1612
1613 i += len;
1614 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1615 pkt_dev->svlan_id = value; /* turn on SVLAN */
1616
1617 if (debug)
1618 pr_debug("SVLAN turned on\n");
1619
1620 if (debug && pkt_dev->nr_labels)
1621 pr_debug("MPLS auto turned off\n");
1622
1623 pkt_dev->nr_labels = 0; /* turn off MPLS */
1624 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1625 } else {
1626 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1627 pkt_dev->svlan_id = 0xffff;
1628
1629 if (debug)
1630 pr_debug("VLAN/SVLAN turned off\n");
1631 }
1632 return count;
1633 }
1634
1635 if (!strcmp(name, "svlan_p")) {
1636 len = num_arg(&user_buffer[i], 1, &value);
1637 if (len < 0)
1638 return len;
1639
1640 i += len;
1641 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1642 pkt_dev->svlan_p = value;
1643 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1644 } else {
1645 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1646 }
1647 return count;
1648 }
1649
1650 if (!strcmp(name, "svlan_cfi")) {
1651 len = num_arg(&user_buffer[i], 1, &value);
1652 if (len < 0)
1653 return len;
1654
1655 i += len;
1656 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1657 pkt_dev->svlan_cfi = value;
1658 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1659 } else {
1660 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1661 }
1662 return count;
1663 }
1664
1665 if (!strcmp(name, "tos")) {
1666 __u32 tmp_value = 0;
1667 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1668 if (len < 0)
1669 return len;
1670
1671 i += len;
1672 if (len == 2) {
1673 pkt_dev->tos = tmp_value;
1674 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1675 } else {
1676 sprintf(pg_result, "ERROR: tos must be 00-ff");
1677 }
1678 return count;
1679 }
1680
1681 if (!strcmp(name, "traffic_class")) {
1682 __u32 tmp_value = 0;
1683 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1684 if (len < 0)
1685 return len;
1686
1687 i += len;
1688 if (len == 2) {
1689 pkt_dev->traffic_class = tmp_value;
1690 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1691 } else {
1692 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1693 }
1694 return count;
1695 }
1696
1697 if (!strcmp(name, "skb_priority")) {
1698 len = num_arg(&user_buffer[i], 9, &value);
1699 if (len < 0)
1700 return len;
1701
1702 i += len;
1703 pkt_dev->skb_priority = value;
1704 sprintf(pg_result, "OK: skb_priority=%i",
1705 pkt_dev->skb_priority);
1706 return count;
1707 }
1708
1709 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1710 return -EINVAL;
1711}
1712
1713static int pktgen_if_open(struct inode *inode, struct file *file)
1714{
1715 return single_open(file, pktgen_if_show, PDE_DATA(inode));
1716}
1717
1718static const struct file_operations pktgen_if_fops = {
1719 .open = pktgen_if_open,
1720 .read = seq_read,
1721 .llseek = seq_lseek,
1722 .write = pktgen_if_write,
1723 .release = single_release,
1724};
1725
1726static int pktgen_thread_show(struct seq_file *seq, void *v)
1727{
1728 struct pktgen_thread *t = seq->private;
1729 const struct pktgen_dev *pkt_dev;
1730
1731 BUG_ON(!t);
1732
1733 seq_puts(seq, "Running: ");
1734
1735 rcu_read_lock();
1736 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1737 if (pkt_dev->running)
1738 seq_printf(seq, "%s ", pkt_dev->odevname);
1739
1740 seq_puts(seq, "\nStopped: ");
1741
1742 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1743 if (!pkt_dev->running)
1744 seq_printf(seq, "%s ", pkt_dev->odevname);
1745
1746 if (t->result[0])
1747 seq_printf(seq, "\nResult: %s\n", t->result);
1748 else
1749 seq_puts(seq, "\nResult: NA\n");
1750
1751 rcu_read_unlock();
1752
1753 return 0;
1754}
1755
1756static ssize_t pktgen_thread_write(struct file *file,
1757 const char __user * user_buffer,
1758 size_t count, loff_t * offset)
1759{
1760 struct seq_file *seq = file->private_data;
1761 struct pktgen_thread *t = seq->private;
1762 int i, max, len, ret;
1763 char name[40];
1764 char *pg_result;
1765
1766 if (count < 1) {
1767 // sprintf(pg_result, "Wrong command format");
1768 return -EINVAL;
1769 }
1770
1771 max = count;
1772 len = count_trail_chars(user_buffer, max);
1773 if (len < 0)
1774 return len;
1775
1776 i = len;
1777
1778 /* Read variable name */
1779
1780 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1781 if (len < 0)
1782 return len;
1783
1784 memset(name, 0, sizeof(name));
1785 if (copy_from_user(name, &user_buffer[i], len))
1786 return -EFAULT;
1787 i += len;
1788
1789 max = count - i;
1790 len = count_trail_chars(&user_buffer[i], max);
1791 if (len < 0)
1792 return len;
1793
1794 i += len;
1795
1796 if (debug)
1797 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
1798
1799 if (!t) {
1800 pr_err("ERROR: No thread\n");
1801 ret = -EINVAL;
1802 goto out;
1803 }
1804
1805 pg_result = &(t->result[0]);
1806
1807 if (!strcmp(name, "add_device")) {
1808 char f[32];
1809 memset(f, 0, 32);
1810 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1811 if (len < 0) {
1812 ret = len;
1813 goto out;
1814 }
1815 if (copy_from_user(f, &user_buffer[i], len))
1816 return -EFAULT;
1817 i += len;
1818 mutex_lock(&pktgen_thread_lock);
1819 ret = pktgen_add_device(t, f);
1820 mutex_unlock(&pktgen_thread_lock);
1821 if (!ret) {
1822 ret = count;
1823 sprintf(pg_result, "OK: add_device=%s", f);
1824 } else
1825 sprintf(pg_result, "ERROR: can not add device %s", f);
1826 goto out;
1827 }
1828
1829 if (!strcmp(name, "rem_device_all")) {
1830 mutex_lock(&pktgen_thread_lock);
1831 t->control |= T_REMDEVALL;
1832 mutex_unlock(&pktgen_thread_lock);
1833 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1834 ret = count;
1835 sprintf(pg_result, "OK: rem_device_all");
1836 goto out;
1837 }
1838
1839 if (!strcmp(name, "max_before_softirq")) {
1840 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1841 ret = count;
1842 goto out;
1843 }
1844
1845 ret = -EINVAL;
1846out:
1847 return ret;
1848}
1849
1850static int pktgen_thread_open(struct inode *inode, struct file *file)
1851{
1852 return single_open(file, pktgen_thread_show, PDE_DATA(inode));
1853}
1854
1855static const struct file_operations pktgen_thread_fops = {
1856 .open = pktgen_thread_open,
1857 .read = seq_read,
1858 .llseek = seq_lseek,
1859 .write = pktgen_thread_write,
1860 .release = single_release,
1861};
1862
1863/* Think find or remove for NN */
1864static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn,
1865 const char *ifname, int remove)
1866{
1867 struct pktgen_thread *t;
1868 struct pktgen_dev *pkt_dev = NULL;
1869 bool exact = (remove == FIND);
1870
1871 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1872 pkt_dev = pktgen_find_dev(t, ifname, exact);
1873 if (pkt_dev) {
1874 if (remove) {
1875 pkt_dev->removal_mark = 1;
1876 t->control |= T_REMDEV;
1877 }
1878 break;
1879 }
1880 }
1881 return pkt_dev;
1882}
1883
1884/*
1885 * mark a device for removal
1886 */
1887static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname)
1888{
1889 struct pktgen_dev *pkt_dev = NULL;
1890 const int max_tries = 10, msec_per_try = 125;
1891 int i = 0;
1892
1893 mutex_lock(&pktgen_thread_lock);
1894 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1895
1896 while (1) {
1897
1898 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE);
1899 if (pkt_dev == NULL)
1900 break; /* success */
1901
1902 mutex_unlock(&pktgen_thread_lock);
1903 pr_debug("%s: waiting for %s to disappear....\n",
1904 __func__, ifname);
1905 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1906 mutex_lock(&pktgen_thread_lock);
1907
1908 if (++i >= max_tries) {
1909 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1910 __func__, msec_per_try * i, ifname);
1911 break;
1912 }
1913
1914 }
1915
1916 mutex_unlock(&pktgen_thread_lock);
1917}
1918
1919static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev)
1920{
1921 struct pktgen_thread *t;
1922
1923 mutex_lock(&pktgen_thread_lock);
1924
1925 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1926 struct pktgen_dev *pkt_dev;
1927
1928 if_lock(t);
1929 list_for_each_entry(pkt_dev, &t->if_list, list) {
1930 if (pkt_dev->odev != dev)
1931 continue;
1932
1933 proc_remove(pkt_dev->entry);
1934
1935 pkt_dev->entry = proc_create_data(dev->name, 0600,
1936 pn->proc_dir,
1937 &pktgen_if_fops,
1938 pkt_dev);
1939 if (!pkt_dev->entry)
1940 pr_err("can't move proc entry for '%s'\n",
1941 dev->name);
1942 break;
1943 }
1944 if_unlock(t);
1945 }
1946 mutex_unlock(&pktgen_thread_lock);
1947}
1948
1949static int pktgen_device_event(struct notifier_block *unused,
1950 unsigned long event, void *ptr)
1951{
1952 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1953 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id);
1954
1955 if (pn->pktgen_exiting)
1956 return NOTIFY_DONE;
1957
1958 /* It is OK that we do not hold the group lock right now,
1959 * as we run under the RTNL lock.
1960 */
1961
1962 switch (event) {
1963 case NETDEV_CHANGENAME:
1964 pktgen_change_name(pn, dev);
1965 break;
1966
1967 case NETDEV_UNREGISTER:
1968 pktgen_mark_device(pn, dev->name);
1969 break;
1970 }
1971
1972 return NOTIFY_DONE;
1973}
1974
1975static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn,
1976 struct pktgen_dev *pkt_dev,
1977 const char *ifname)
1978{
1979 char b[IFNAMSIZ+5];
1980 int i;
1981
1982 for (i = 0; ifname[i] != '@'; i++) {
1983 if (i == IFNAMSIZ)
1984 break;
1985
1986 b[i] = ifname[i];
1987 }
1988 b[i] = 0;
1989
1990 return dev_get_by_name(pn->net, b);
1991}
1992
1993
1994/* Associate pktgen_dev with a device. */
1995
1996static int pktgen_setup_dev(const struct pktgen_net *pn,
1997 struct pktgen_dev *pkt_dev, const char *ifname)
1998{
1999 struct net_device *odev;
2000 int err;
2001
2002 /* Clean old setups */
2003 if (pkt_dev->odev) {
2004 dev_put(pkt_dev->odev);
2005 pkt_dev->odev = NULL;
2006 }
2007
2008 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname);
2009 if (!odev) {
2010 pr_err("no such netdevice: \"%s\"\n", ifname);
2011 return -ENODEV;
2012 }
2013
2014 if (odev->type != ARPHRD_ETHER) {
2015 pr_err("not an ethernet device: \"%s\"\n", ifname);
2016 err = -EINVAL;
2017 } else if (!netif_running(odev)) {
2018 pr_err("device is down: \"%s\"\n", ifname);
2019 err = -ENETDOWN;
2020 } else {
2021 pkt_dev->odev = odev;
2022 return 0;
2023 }
2024
2025 dev_put(odev);
2026 return err;
2027}
2028
2029/* Read pkt_dev from the interface and set up internal pktgen_dev
2030 * structure to have the right information to create/send packets
2031 */
2032static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2033{
2034 int ntxq;
2035
2036 if (!pkt_dev->odev) {
2037 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2038 sprintf(pkt_dev->result,
2039 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2040 return;
2041 }
2042
2043 /* make sure that we don't pick a non-existing transmit queue */
2044 ntxq = pkt_dev->odev->real_num_tx_queues;
2045
2046 if (ntxq <= pkt_dev->queue_map_min) {
2047 pr_warn("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2048 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2049 pkt_dev->odevname);
2050 pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2051 }
2052 if (pkt_dev->queue_map_max >= ntxq) {
2053 pr_warn("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2054 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2055 pkt_dev->odevname);
2056 pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2057 }
2058
2059 /* Default to the interface's mac if not explicitly set. */
2060
2061 if (is_zero_ether_addr(pkt_dev->src_mac))
2062 ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr);
2063
2064 /* Set up Dest MAC */
2065 ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac);
2066
2067 if (pkt_dev->flags & F_IPV6) {
2068 int i, set = 0, err = 1;
2069 struct inet6_dev *idev;
2070
2071 if (pkt_dev->min_pkt_size == 0) {
2072 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
2073 + sizeof(struct udphdr)
2074 + sizeof(struct pktgen_hdr)
2075 + pkt_dev->pkt_overhead;
2076 }
2077
2078 for (i = 0; i < sizeof(struct in6_addr); i++)
2079 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2080 set = 1;
2081 break;
2082 }
2083
2084 if (!set) {
2085
2086 /*
2087 * Use linklevel address if unconfigured.
2088 *
2089 * use ipv6_get_lladdr if/when it's get exported
2090 */
2091
2092 rcu_read_lock();
2093 idev = __in6_dev_get(pkt_dev->odev);
2094 if (idev) {
2095 struct inet6_ifaddr *ifp;
2096
2097 read_lock_bh(&idev->lock);
2098 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2099 if ((ifp->scope & IFA_LINK) &&
2100 !(ifp->flags & IFA_F_TENTATIVE)) {
2101 pkt_dev->cur_in6_saddr = ifp->addr;
2102 err = 0;
2103 break;
2104 }
2105 }
2106 read_unlock_bh(&idev->lock);
2107 }
2108 rcu_read_unlock();
2109 if (err)
2110 pr_err("ERROR: IPv6 link address not available\n");
2111 }
2112 } else {
2113 if (pkt_dev->min_pkt_size == 0) {
2114 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
2115 + sizeof(struct udphdr)
2116 + sizeof(struct pktgen_hdr)
2117 + pkt_dev->pkt_overhead;
2118 }
2119
2120 pkt_dev->saddr_min = 0;
2121 pkt_dev->saddr_max = 0;
2122 if (strlen(pkt_dev->src_min) == 0) {
2123
2124 struct in_device *in_dev;
2125
2126 rcu_read_lock();
2127 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2128 if (in_dev) {
2129 if (in_dev->ifa_list) {
2130 pkt_dev->saddr_min =
2131 in_dev->ifa_list->ifa_address;
2132 pkt_dev->saddr_max = pkt_dev->saddr_min;
2133 }
2134 }
2135 rcu_read_unlock();
2136 } else {
2137 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2138 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2139 }
2140
2141 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2142 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2143 }
2144 /* Initialize current values. */
2145 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2146 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
2147 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
2148
2149 pkt_dev->cur_dst_mac_offset = 0;
2150 pkt_dev->cur_src_mac_offset = 0;
2151 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2152 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2153 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2154 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2155 pkt_dev->nflows = 0;
2156}
2157
2158
2159static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2160{
2161 ktime_t start_time, end_time;
2162 s64 remaining;
2163 struct hrtimer_sleeper t;
2164
2165 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2166 hrtimer_set_expires(&t.timer, spin_until);
2167
2168 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2169 if (remaining <= 0)
2170 goto out;
2171
2172 start_time = ktime_get();
2173 if (remaining < 100000) {
2174 /* for small delays (<100us), just loop until limit is reached */
2175 do {
2176 end_time = ktime_get();
2177 } while (ktime_compare(end_time, spin_until) < 0);
2178 } else {
2179 /* see do_nanosleep */
2180 hrtimer_init_sleeper(&t, current);
2181 do {
2182 set_current_state(TASK_INTERRUPTIBLE);
2183 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2184
2185 if (likely(t.task))
2186 schedule();
2187
2188 hrtimer_cancel(&t.timer);
2189 } while (t.task && pkt_dev->running && !signal_pending(current));
2190 __set_current_state(TASK_RUNNING);
2191 end_time = ktime_get();
2192 }
2193
2194 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2195out:
2196 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2197 destroy_hrtimer_on_stack(&t.timer);
2198}
2199
2200static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2201{
2202 pkt_dev->pkt_overhead = 0;
2203 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2204 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2205 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2206}
2207
2208static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2209{
2210 return !!(pkt_dev->flows[flow].flags & F_INIT);
2211}
2212
2213static inline int f_pick(struct pktgen_dev *pkt_dev)
2214{
2215 int flow = pkt_dev->curfl;
2216
2217 if (pkt_dev->flags & F_FLOW_SEQ) {
2218 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2219 /* reset time */
2220 pkt_dev->flows[flow].count = 0;
2221 pkt_dev->flows[flow].flags = 0;
2222 pkt_dev->curfl += 1;
2223 if (pkt_dev->curfl >= pkt_dev->cflows)
2224 pkt_dev->curfl = 0; /*reset */
2225 }
2226 } else {
2227 flow = prandom_u32() % pkt_dev->cflows;
2228 pkt_dev->curfl = flow;
2229
2230 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2231 pkt_dev->flows[flow].count = 0;
2232 pkt_dev->flows[flow].flags = 0;
2233 }
2234 }
2235
2236 return pkt_dev->curfl;
2237}
2238
2239
2240#ifdef CONFIG_XFRM
2241/* If there was already an IPSEC SA, we keep it as is, else
2242 * we go look for it ...
2243*/
2244#define DUMMY_MARK 0
2245static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2246{
2247 struct xfrm_state *x = pkt_dev->flows[flow].x;
2248 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
2249 if (!x) {
2250
2251 if (pkt_dev->spi) {
2252 /* We need as quick as possible to find the right SA
2253 * Searching with minimum criteria to archieve this.
2254 */
2255 x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET);
2256 } else {
2257 /* slow path: we dont already have xfrm_state */
2258 x = xfrm_stateonly_find(pn->net, DUMMY_MARK,
2259 (xfrm_address_t *)&pkt_dev->cur_daddr,
2260 (xfrm_address_t *)&pkt_dev->cur_saddr,
2261 AF_INET,
2262 pkt_dev->ipsmode,
2263 pkt_dev->ipsproto, 0);
2264 }
2265 if (x) {
2266 pkt_dev->flows[flow].x = x;
2267 set_pkt_overhead(pkt_dev);
2268 pkt_dev->pkt_overhead += x->props.header_len;
2269 }
2270
2271 }
2272}
2273#endif
2274static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2275{
2276
2277 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2278 pkt_dev->cur_queue_map = smp_processor_id();
2279
2280 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2281 __u16 t;
2282 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2283 t = prandom_u32() %
2284 (pkt_dev->queue_map_max -
2285 pkt_dev->queue_map_min + 1)
2286 + pkt_dev->queue_map_min;
2287 } else {
2288 t = pkt_dev->cur_queue_map + 1;
2289 if (t > pkt_dev->queue_map_max)
2290 t = pkt_dev->queue_map_min;
2291 }
2292 pkt_dev->cur_queue_map = t;
2293 }
2294 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2295}
2296
2297/* Increment/randomize headers according to flags and current values
2298 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2299 */
2300static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2301{
2302 __u32 imn;
2303 __u32 imx;
2304 int flow = 0;
2305
2306 if (pkt_dev->cflows)
2307 flow = f_pick(pkt_dev);
2308
2309 /* Deal with source MAC */
2310 if (pkt_dev->src_mac_count > 1) {
2311 __u32 mc;
2312 __u32 tmp;
2313
2314 if (pkt_dev->flags & F_MACSRC_RND)
2315 mc = prandom_u32() % pkt_dev->src_mac_count;
2316 else {
2317 mc = pkt_dev->cur_src_mac_offset++;
2318 if (pkt_dev->cur_src_mac_offset >=
2319 pkt_dev->src_mac_count)
2320 pkt_dev->cur_src_mac_offset = 0;
2321 }
2322
2323 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2324 pkt_dev->hh[11] = tmp;
2325 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2326 pkt_dev->hh[10] = tmp;
2327 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2328 pkt_dev->hh[9] = tmp;
2329 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2330 pkt_dev->hh[8] = tmp;
2331 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2332 pkt_dev->hh[7] = tmp;
2333 }
2334
2335 /* Deal with Destination MAC */
2336 if (pkt_dev->dst_mac_count > 1) {
2337 __u32 mc;
2338 __u32 tmp;
2339
2340 if (pkt_dev->flags & F_MACDST_RND)
2341 mc = prandom_u32() % pkt_dev->dst_mac_count;
2342
2343 else {
2344 mc = pkt_dev->cur_dst_mac_offset++;
2345 if (pkt_dev->cur_dst_mac_offset >=
2346 pkt_dev->dst_mac_count) {
2347 pkt_dev->cur_dst_mac_offset = 0;
2348 }
2349 }
2350
2351 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2352 pkt_dev->hh[5] = tmp;
2353 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2354 pkt_dev->hh[4] = tmp;
2355 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2356 pkt_dev->hh[3] = tmp;
2357 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2358 pkt_dev->hh[2] = tmp;
2359 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2360 pkt_dev->hh[1] = tmp;
2361 }
2362
2363 if (pkt_dev->flags & F_MPLS_RND) {
2364 unsigned int i;
2365 for (i = 0; i < pkt_dev->nr_labels; i++)
2366 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2367 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2368 ((__force __be32)prandom_u32() &
2369 htonl(0x000fffff));
2370 }
2371
2372 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2373 pkt_dev->vlan_id = prandom_u32() & (4096 - 1);
2374 }
2375
2376 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2377 pkt_dev->svlan_id = prandom_u32() & (4096 - 1);
2378 }
2379
2380 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2381 if (pkt_dev->flags & F_UDPSRC_RND)
2382 pkt_dev->cur_udp_src = prandom_u32() %
2383 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2384 + pkt_dev->udp_src_min;
2385
2386 else {
2387 pkt_dev->cur_udp_src++;
2388 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2389 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2390 }
2391 }
2392
2393 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2394 if (pkt_dev->flags & F_UDPDST_RND) {
2395 pkt_dev->cur_udp_dst = prandom_u32() %
2396 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2397 + pkt_dev->udp_dst_min;
2398 } else {
2399 pkt_dev->cur_udp_dst++;
2400 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2401 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2402 }
2403 }
2404
2405 if (!(pkt_dev->flags & F_IPV6)) {
2406
2407 imn = ntohl(pkt_dev->saddr_min);
2408 imx = ntohl(pkt_dev->saddr_max);
2409 if (imn < imx) {
2410 __u32 t;
2411 if (pkt_dev->flags & F_IPSRC_RND)
2412 t = prandom_u32() % (imx - imn) + imn;
2413 else {
2414 t = ntohl(pkt_dev->cur_saddr);
2415 t++;
2416 if (t > imx)
2417 t = imn;
2418
2419 }
2420 pkt_dev->cur_saddr = htonl(t);
2421 }
2422
2423 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2424 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2425 } else {
2426 imn = ntohl(pkt_dev->daddr_min);
2427 imx = ntohl(pkt_dev->daddr_max);
2428 if (imn < imx) {
2429 __u32 t;
2430 __be32 s;
2431 if (pkt_dev->flags & F_IPDST_RND) {
2432
2433 do {
2434 t = prandom_u32() %
2435 (imx - imn) + imn;
2436 s = htonl(t);
2437 } while (ipv4_is_loopback(s) ||
2438 ipv4_is_multicast(s) ||
2439 ipv4_is_lbcast(s) ||
2440 ipv4_is_zeronet(s) ||
2441 ipv4_is_local_multicast(s));
2442 pkt_dev->cur_daddr = s;
2443 } else {
2444 t = ntohl(pkt_dev->cur_daddr);
2445 t++;
2446 if (t > imx) {
2447 t = imn;
2448 }
2449 pkt_dev->cur_daddr = htonl(t);
2450 }
2451 }
2452 if (pkt_dev->cflows) {
2453 pkt_dev->flows[flow].flags |= F_INIT;
2454 pkt_dev->flows[flow].cur_daddr =
2455 pkt_dev->cur_daddr;
2456#ifdef CONFIG_XFRM
2457 if (pkt_dev->flags & F_IPSEC)
2458 get_ipsec_sa(pkt_dev, flow);
2459#endif
2460 pkt_dev->nflows++;
2461 }
2462 }
2463 } else { /* IPV6 * */
2464
2465 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
2466 int i;
2467
2468 /* Only random destinations yet */
2469
2470 for (i = 0; i < 4; i++) {
2471 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2472 (((__force __be32)prandom_u32() |
2473 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2474 pkt_dev->max_in6_daddr.s6_addr32[i]);
2475 }
2476 }
2477 }
2478
2479 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2480 __u32 t;
2481 if (pkt_dev->flags & F_TXSIZE_RND) {
2482 t = prandom_u32() %
2483 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2484 + pkt_dev->min_pkt_size;
2485 } else {
2486 t = pkt_dev->cur_pkt_size + 1;
2487 if (t > pkt_dev->max_pkt_size)
2488 t = pkt_dev->min_pkt_size;
2489 }
2490 pkt_dev->cur_pkt_size = t;
2491 }
2492
2493 set_cur_queue_map(pkt_dev);
2494
2495 pkt_dev->flows[flow].count++;
2496}
2497
2498
2499#ifdef CONFIG_XFRM
2500static u32 pktgen_dst_metrics[RTAX_MAX + 1] = {
2501
2502 [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */
2503};
2504
2505static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2506{
2507 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2508 int err = 0;
2509 struct net *net = dev_net(pkt_dev->odev);
2510
2511 if (!x)
2512 return 0;
2513 /* XXX: we dont support tunnel mode for now until
2514 * we resolve the dst issue */
2515 if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0))
2516 return 0;
2517
2518 /* But when user specify an valid SPI, transformation
2519 * supports both transport/tunnel mode + ESP/AH type.
2520 */
2521 if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0))
2522 skb->_skb_refdst = (unsigned long)&pkt_dev->xdst.u.dst | SKB_DST_NOREF;
2523
2524 rcu_read_lock_bh();
2525 err = x->outer_mode->output(x, skb);
2526 rcu_read_unlock_bh();
2527 if (err) {
2528 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR);
2529 goto error;
2530 }
2531 err = x->type->output(x, skb);
2532 if (err) {
2533 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR);
2534 goto error;
2535 }
2536 spin_lock_bh(&x->lock);
2537 x->curlft.bytes += skb->len;
2538 x->curlft.packets++;
2539 spin_unlock_bh(&x->lock);
2540error:
2541 return err;
2542}
2543
2544static void free_SAs(struct pktgen_dev *pkt_dev)
2545{
2546 if (pkt_dev->cflows) {
2547 /* let go of the SAs if we have them */
2548 int i;
2549 for (i = 0; i < pkt_dev->cflows; i++) {
2550 struct xfrm_state *x = pkt_dev->flows[i].x;
2551 if (x) {
2552 xfrm_state_put(x);
2553 pkt_dev->flows[i].x = NULL;
2554 }
2555 }
2556 }
2557}
2558
2559static int process_ipsec(struct pktgen_dev *pkt_dev,
2560 struct sk_buff *skb, __be16 protocol)
2561{
2562 if (pkt_dev->flags & F_IPSEC) {
2563 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2564 int nhead = 0;
2565 if (x) {
2566 struct ethhdr *eth;
2567 struct iphdr *iph;
2568 int ret;
2569
2570 nhead = x->props.header_len - skb_headroom(skb);
2571 if (nhead > 0) {
2572 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2573 if (ret < 0) {
2574 pr_err("Error expanding ipsec packet %d\n",
2575 ret);
2576 goto err;
2577 }
2578 }
2579
2580 /* ipsec is not expecting ll header */
2581 skb_pull(skb, ETH_HLEN);
2582 ret = pktgen_output_ipsec(skb, pkt_dev);
2583 if (ret) {
2584 pr_err("Error creating ipsec packet %d\n", ret);
2585 goto err;
2586 }
2587 /* restore ll */
2588 eth = skb_push(skb, ETH_HLEN);
2589 memcpy(eth, pkt_dev->hh, 2 * ETH_ALEN);
2590 eth->h_proto = protocol;
2591
2592 /* Update IPv4 header len as well as checksum value */
2593 iph = ip_hdr(skb);
2594 iph->tot_len = htons(skb->len - ETH_HLEN);
2595 ip_send_check(iph);
2596 }
2597 }
2598 return 1;
2599err:
2600 kfree_skb(skb);
2601 return 0;
2602}
2603#endif
2604
2605static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2606{
2607 unsigned int i;
2608 for (i = 0; i < pkt_dev->nr_labels; i++)
2609 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2610
2611 mpls--;
2612 *mpls |= MPLS_STACK_BOTTOM;
2613}
2614
2615static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2616 unsigned int prio)
2617{
2618 return htons(id | (cfi << 12) | (prio << 13));
2619}
2620
2621static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2622 int datalen)
2623{
2624 struct timespec64 timestamp;
2625 struct pktgen_hdr *pgh;
2626
2627 pgh = skb_put(skb, sizeof(*pgh));
2628 datalen -= sizeof(*pgh);
2629
2630 if (pkt_dev->nfrags <= 0) {
2631 skb_put_zero(skb, datalen);
2632 } else {
2633 int frags = pkt_dev->nfrags;
2634 int i, len;
2635 int frag_len;
2636
2637
2638 if (frags > MAX_SKB_FRAGS)
2639 frags = MAX_SKB_FRAGS;
2640 len = datalen - frags * PAGE_SIZE;
2641 if (len > 0) {
2642 skb_put_zero(skb, len);
2643 datalen = frags * PAGE_SIZE;
2644 }
2645
2646 i = 0;
2647 frag_len = (datalen/frags) < PAGE_SIZE ?
2648 (datalen/frags) : PAGE_SIZE;
2649 while (datalen > 0) {
2650 if (unlikely(!pkt_dev->page)) {
2651 int node = numa_node_id();
2652
2653 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2654 node = pkt_dev->node;
2655 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2656 if (!pkt_dev->page)
2657 break;
2658 }
2659 get_page(pkt_dev->page);
2660 skb_frag_set_page(skb, i, pkt_dev->page);
2661 skb_shinfo(skb)->frags[i].page_offset = 0;
2662 /*last fragment, fill rest of data*/
2663 if (i == (frags - 1))
2664 skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2665 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2666 else
2667 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2668 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2669 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2670 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2671 i++;
2672 skb_shinfo(skb)->nr_frags = i;
2673 }
2674 }
2675
2676 /* Stamp the time, and sequence number,
2677 * convert them to network byte order
2678 */
2679 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2680 pgh->seq_num = htonl(pkt_dev->seq_num);
2681
2682 if (pkt_dev->flags & F_NO_TIMESTAMP) {
2683 pgh->tv_sec = 0;
2684 pgh->tv_usec = 0;
2685 } else {
2686 /*
2687 * pgh->tv_sec wraps in y2106 when interpreted as unsigned
2688 * as done by wireshark, or y2038 when interpreted as signed.
2689 * This is probably harmless, but if anyone wants to improve
2690 * it, we could introduce a variant that puts 64-bit nanoseconds
2691 * into the respective header bytes.
2692 * This would also be slightly faster to read.
2693 */
2694 ktime_get_real_ts64(×tamp);
2695 pgh->tv_sec = htonl(timestamp.tv_sec);
2696 pgh->tv_usec = htonl(timestamp.tv_nsec / NSEC_PER_USEC);
2697 }
2698}
2699
2700static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
2701 struct pktgen_dev *pkt_dev)
2702{
2703 unsigned int extralen = LL_RESERVED_SPACE(dev);
2704 struct sk_buff *skb = NULL;
2705 unsigned int size;
2706
2707 size = pkt_dev->cur_pkt_size + 64 + extralen + pkt_dev->pkt_overhead;
2708 if (pkt_dev->flags & F_NODE) {
2709 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id();
2710
2711 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node);
2712 if (likely(skb)) {
2713 skb_reserve(skb, NET_SKB_PAD);
2714 skb->dev = dev;
2715 }
2716 } else {
2717 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
2718 }
2719
2720 /* the caller pre-fetches from skb->data and reserves for the mac hdr */
2721 if (likely(skb))
2722 skb_reserve(skb, extralen - 16);
2723
2724 return skb;
2725}
2726
2727static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2728 struct pktgen_dev *pkt_dev)
2729{
2730 struct sk_buff *skb = NULL;
2731 __u8 *eth;
2732 struct udphdr *udph;
2733 int datalen, iplen;
2734 struct iphdr *iph;
2735 __be16 protocol = htons(ETH_P_IP);
2736 __be32 *mpls;
2737 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2738 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2739 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2740 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2741 u16 queue_map;
2742
2743 if (pkt_dev->nr_labels)
2744 protocol = htons(ETH_P_MPLS_UC);
2745
2746 if (pkt_dev->vlan_id != 0xffff)
2747 protocol = htons(ETH_P_8021Q);
2748
2749 /* Update any of the values, used when we're incrementing various
2750 * fields.
2751 */
2752 mod_cur_headers(pkt_dev);
2753 queue_map = pkt_dev->cur_queue_map;
2754
2755 skb = pktgen_alloc_skb(odev, pkt_dev);
2756 if (!skb) {
2757 sprintf(pkt_dev->result, "No memory");
2758 return NULL;
2759 }
2760
2761 prefetchw(skb->data);
2762 skb_reserve(skb, 16);
2763
2764 /* Reserve for ethernet and IP header */
2765 eth = skb_push(skb, 14);
2766 mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32));
2767 if (pkt_dev->nr_labels)
2768 mpls_push(mpls, pkt_dev);
2769
2770 if (pkt_dev->vlan_id != 0xffff) {
2771 if (pkt_dev->svlan_id != 0xffff) {
2772 svlan_tci = skb_put(skb, sizeof(__be16));
2773 *svlan_tci = build_tci(pkt_dev->svlan_id,
2774 pkt_dev->svlan_cfi,
2775 pkt_dev->svlan_p);
2776 svlan_encapsulated_proto = skb_put(skb,
2777 sizeof(__be16));
2778 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2779 }
2780 vlan_tci = skb_put(skb, sizeof(__be16));
2781 *vlan_tci = build_tci(pkt_dev->vlan_id,
2782 pkt_dev->vlan_cfi,
2783 pkt_dev->vlan_p);
2784 vlan_encapsulated_proto = skb_put(skb, sizeof(__be16));
2785 *vlan_encapsulated_proto = htons(ETH_P_IP);
2786 }
2787
2788 skb_reset_mac_header(skb);
2789 skb_set_network_header(skb, skb->len);
2790 iph = skb_put(skb, sizeof(struct iphdr));
2791
2792 skb_set_transport_header(skb, skb->len);
2793 udph = skb_put(skb, sizeof(struct udphdr));
2794 skb_set_queue_mapping(skb, queue_map);
2795 skb->priority = pkt_dev->skb_priority;
2796
2797 memcpy(eth, pkt_dev->hh, 12);
2798 *(__be16 *) & eth[12] = protocol;
2799
2800 /* Eth + IPh + UDPh + mpls */
2801 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2802 pkt_dev->pkt_overhead;
2803 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
2804 datalen = sizeof(struct pktgen_hdr);
2805
2806 udph->source = htons(pkt_dev->cur_udp_src);
2807 udph->dest = htons(pkt_dev->cur_udp_dst);
2808 udph->len = htons(datalen + 8); /* DATA + udphdr */
2809 udph->check = 0;
2810
2811 iph->ihl = 5;
2812 iph->version = 4;
2813 iph->ttl = 32;
2814 iph->tos = pkt_dev->tos;
2815 iph->protocol = IPPROTO_UDP; /* UDP */
2816 iph->saddr = pkt_dev->cur_saddr;
2817 iph->daddr = pkt_dev->cur_daddr;
2818 iph->id = htons(pkt_dev->ip_id);
2819 pkt_dev->ip_id++;
2820 iph->frag_off = 0;
2821 iplen = 20 + 8 + datalen;
2822 iph->tot_len = htons(iplen);
2823 ip_send_check(iph);
2824 skb->protocol = protocol;
2825 skb->dev = odev;
2826 skb->pkt_type = PACKET_HOST;
2827
2828 pktgen_finalize_skb(pkt_dev, skb, datalen);
2829
2830 if (!(pkt_dev->flags & F_UDPCSUM)) {
2831 skb->ip_summed = CHECKSUM_NONE;
2832 } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IP_CSUM)) {
2833 skb->ip_summed = CHECKSUM_PARTIAL;
2834 skb->csum = 0;
2835 udp4_hwcsum(skb, iph->saddr, iph->daddr);
2836 } else {
2837 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), datalen + 8, 0);
2838
2839 /* add protocol-dependent pseudo-header */
2840 udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
2841 datalen + 8, IPPROTO_UDP, csum);
2842
2843 if (udph->check == 0)
2844 udph->check = CSUM_MANGLED_0;
2845 }
2846
2847#ifdef CONFIG_XFRM
2848 if (!process_ipsec(pkt_dev, skb, protocol))
2849 return NULL;
2850#endif
2851
2852 return skb;
2853}
2854
2855static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2856 struct pktgen_dev *pkt_dev)
2857{
2858 struct sk_buff *skb = NULL;
2859 __u8 *eth;
2860 struct udphdr *udph;
2861 int datalen, udplen;
2862 struct ipv6hdr *iph;
2863 __be16 protocol = htons(ETH_P_IPV6);
2864 __be32 *mpls;
2865 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2866 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2867 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2868 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2869 u16 queue_map;
2870
2871 if (pkt_dev->nr_labels)
2872 protocol = htons(ETH_P_MPLS_UC);
2873
2874 if (pkt_dev->vlan_id != 0xffff)
2875 protocol = htons(ETH_P_8021Q);
2876
2877 /* Update any of the values, used when we're incrementing various
2878 * fields.
2879 */
2880 mod_cur_headers(pkt_dev);
2881 queue_map = pkt_dev->cur_queue_map;
2882
2883 skb = pktgen_alloc_skb(odev, pkt_dev);
2884 if (!skb) {
2885 sprintf(pkt_dev->result, "No memory");
2886 return NULL;
2887 }
2888
2889 prefetchw(skb->data);
2890 skb_reserve(skb, 16);
2891
2892 /* Reserve for ethernet and IP header */
2893 eth = skb_push(skb, 14);
2894 mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32));
2895 if (pkt_dev->nr_labels)
2896 mpls_push(mpls, pkt_dev);
2897
2898 if (pkt_dev->vlan_id != 0xffff) {
2899 if (pkt_dev->svlan_id != 0xffff) {
2900 svlan_tci = skb_put(skb, sizeof(__be16));
2901 *svlan_tci = build_tci(pkt_dev->svlan_id,
2902 pkt_dev->svlan_cfi,
2903 pkt_dev->svlan_p);
2904 svlan_encapsulated_proto = skb_put(skb,
2905 sizeof(__be16));
2906 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2907 }
2908 vlan_tci = skb_put(skb, sizeof(__be16));
2909 *vlan_tci = build_tci(pkt_dev->vlan_id,
2910 pkt_dev->vlan_cfi,
2911 pkt_dev->vlan_p);
2912 vlan_encapsulated_proto = skb_put(skb, sizeof(__be16));
2913 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2914 }
2915
2916 skb_reset_mac_header(skb);
2917 skb_set_network_header(skb, skb->len);
2918 iph = skb_put(skb, sizeof(struct ipv6hdr));
2919
2920 skb_set_transport_header(skb, skb->len);
2921 udph = skb_put(skb, sizeof(struct udphdr));
2922 skb_set_queue_mapping(skb, queue_map);
2923 skb->priority = pkt_dev->skb_priority;
2924
2925 memcpy(eth, pkt_dev->hh, 12);
2926 *(__be16 *) ð[12] = protocol;
2927
2928 /* Eth + IPh + UDPh + mpls */
2929 datalen = pkt_dev->cur_pkt_size - 14 -
2930 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2931 pkt_dev->pkt_overhead;
2932
2933 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
2934 datalen = sizeof(struct pktgen_hdr);
2935 net_info_ratelimited("increased datalen to %d\n", datalen);
2936 }
2937
2938 udplen = datalen + sizeof(struct udphdr);
2939 udph->source = htons(pkt_dev->cur_udp_src);
2940 udph->dest = htons(pkt_dev->cur_udp_dst);
2941 udph->len = htons(udplen);
2942 udph->check = 0;
2943
2944 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2945
2946 if (pkt_dev->traffic_class) {
2947 /* Version + traffic class + flow (0) */
2948 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2949 }
2950
2951 iph->hop_limit = 32;
2952
2953 iph->payload_len = htons(udplen);
2954 iph->nexthdr = IPPROTO_UDP;
2955
2956 iph->daddr = pkt_dev->cur_in6_daddr;
2957 iph->saddr = pkt_dev->cur_in6_saddr;
2958
2959 skb->protocol = protocol;
2960 skb->dev = odev;
2961 skb->pkt_type = PACKET_HOST;
2962
2963 pktgen_finalize_skb(pkt_dev, skb, datalen);
2964
2965 if (!(pkt_dev->flags & F_UDPCSUM)) {
2966 skb->ip_summed = CHECKSUM_NONE;
2967 } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IPV6_CSUM)) {
2968 skb->ip_summed = CHECKSUM_PARTIAL;
2969 skb->csum_start = skb_transport_header(skb) - skb->head;
2970 skb->csum_offset = offsetof(struct udphdr, check);
2971 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0);
2972 } else {
2973 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), udplen, 0);
2974
2975 /* add protocol-dependent pseudo-header */
2976 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum);
2977
2978 if (udph->check == 0)
2979 udph->check = CSUM_MANGLED_0;
2980 }
2981
2982 return skb;
2983}
2984
2985static struct sk_buff *fill_packet(struct net_device *odev,
2986 struct pktgen_dev *pkt_dev)
2987{
2988 if (pkt_dev->flags & F_IPV6)
2989 return fill_packet_ipv6(odev, pkt_dev);
2990 else
2991 return fill_packet_ipv4(odev, pkt_dev);
2992}
2993
2994static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2995{
2996 pkt_dev->seq_num = 1;
2997 pkt_dev->idle_acc = 0;
2998 pkt_dev->sofar = 0;
2999 pkt_dev->tx_bytes = 0;
3000 pkt_dev->errors = 0;
3001}
3002
3003/* Set up structure for sending pkts, clear counters */
3004
3005static void pktgen_run(struct pktgen_thread *t)
3006{
3007 struct pktgen_dev *pkt_dev;
3008 int started = 0;
3009
3010 func_enter();
3011
3012 rcu_read_lock();
3013 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3014
3015 /*
3016 * setup odev and create initial packet.
3017 */
3018 pktgen_setup_inject(pkt_dev);
3019
3020 if (pkt_dev->odev) {
3021 pktgen_clear_counters(pkt_dev);
3022 pkt_dev->skb = NULL;
3023 pkt_dev->started_at = pkt_dev->next_tx = ktime_get();
3024
3025 set_pkt_overhead(pkt_dev);
3026
3027 strcpy(pkt_dev->result, "Starting");
3028 pkt_dev->running = 1; /* Cranke yeself! */
3029 started++;
3030 } else
3031 strcpy(pkt_dev->result, "Error starting");
3032 }
3033 rcu_read_unlock();
3034 if (started)
3035 t->control &= ~(T_STOP);
3036}
3037
3038static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn)
3039{
3040 struct pktgen_thread *t;
3041
3042 func_enter();
3043
3044 mutex_lock(&pktgen_thread_lock);
3045
3046 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3047 t->control |= T_STOP;
3048
3049 mutex_unlock(&pktgen_thread_lock);
3050}
3051
3052static int thread_is_running(const struct pktgen_thread *t)
3053{
3054 const struct pktgen_dev *pkt_dev;
3055
3056 rcu_read_lock();
3057 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
3058 if (pkt_dev->running) {
3059 rcu_read_unlock();
3060 return 1;
3061 }
3062 rcu_read_unlock();
3063 return 0;
3064}
3065
3066static int pktgen_wait_thread_run(struct pktgen_thread *t)
3067{
3068 while (thread_is_running(t)) {
3069
3070 msleep_interruptible(100);
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 mutex_lock(&pktgen_thread_lock);
3086
3087 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
3088 sig = pktgen_wait_thread_run(t);
3089 if (sig == 0)
3090 break;
3091 }
3092
3093 if (sig == 0)
3094 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3095 t->control |= (T_STOP);
3096
3097 mutex_unlock(&pktgen_thread_lock);
3098 return sig;
3099}
3100
3101static void pktgen_run_all_threads(struct pktgen_net *pn)
3102{
3103 struct pktgen_thread *t;
3104
3105 func_enter();
3106
3107 mutex_lock(&pktgen_thread_lock);
3108
3109 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3110 t->control |= (T_RUN);
3111
3112 mutex_unlock(&pktgen_thread_lock);
3113
3114 /* Propagate thread->control */
3115 schedule_timeout_interruptible(msecs_to_jiffies(125));
3116
3117 pktgen_wait_all_threads_run(pn);
3118}
3119
3120static void pktgen_reset_all_threads(struct pktgen_net *pn)
3121{
3122 struct pktgen_thread *t;
3123
3124 func_enter();
3125
3126 mutex_lock(&pktgen_thread_lock);
3127
3128 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3129 t->control |= (T_REMDEVALL);
3130
3131 mutex_unlock(&pktgen_thread_lock);
3132
3133 /* Propagate thread->control */
3134 schedule_timeout_interruptible(msecs_to_jiffies(125));
3135
3136 pktgen_wait_all_threads_run(pn);
3137}
3138
3139static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3140{
3141 __u64 bps, mbps, pps;
3142 char *p = pkt_dev->result;
3143 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3144 pkt_dev->started_at);
3145 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3146
3147 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3148 (unsigned long long)ktime_to_us(elapsed),
3149 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3150 (unsigned long long)ktime_to_us(idle),
3151 (unsigned long long)pkt_dev->sofar,
3152 pkt_dev->cur_pkt_size, nr_frags);
3153
3154 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3155 ktime_to_ns(elapsed));
3156
3157 bps = pps * 8 * pkt_dev->cur_pkt_size;
3158
3159 mbps = bps;
3160 do_div(mbps, 1000000);
3161 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3162 (unsigned long long)pps,
3163 (unsigned long long)mbps,
3164 (unsigned long long)bps,
3165 (unsigned long long)pkt_dev->errors);
3166}
3167
3168/* Set stopped-at timer, remove from running list, do counters & statistics */
3169static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3170{
3171 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3172
3173 if (!pkt_dev->running) {
3174 pr_warn("interface: %s is already stopped\n",
3175 pkt_dev->odevname);
3176 return -EINVAL;
3177 }
3178
3179 pkt_dev->running = 0;
3180 kfree_skb(pkt_dev->skb);
3181 pkt_dev->skb = NULL;
3182 pkt_dev->stopped_at = ktime_get();
3183
3184 show_results(pkt_dev, nr_frags);
3185
3186 return 0;
3187}
3188
3189static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3190{
3191 struct pktgen_dev *pkt_dev, *best = NULL;
3192
3193 rcu_read_lock();
3194 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3195 if (!pkt_dev->running)
3196 continue;
3197 if (best == NULL)
3198 best = pkt_dev;
3199 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0)
3200 best = pkt_dev;
3201 }
3202 rcu_read_unlock();
3203
3204 return best;
3205}
3206
3207static void pktgen_stop(struct pktgen_thread *t)
3208{
3209 struct pktgen_dev *pkt_dev;
3210
3211 func_enter();
3212
3213 rcu_read_lock();
3214
3215 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3216 pktgen_stop_device(pkt_dev);
3217 }
3218
3219 rcu_read_unlock();
3220}
3221
3222/*
3223 * one of our devices needs to be removed - find it
3224 * and remove it
3225 */
3226static void pktgen_rem_one_if(struct pktgen_thread *t)
3227{
3228 struct list_head *q, *n;
3229 struct pktgen_dev *cur;
3230
3231 func_enter();
3232
3233 list_for_each_safe(q, n, &t->if_list) {
3234 cur = list_entry(q, struct pktgen_dev, list);
3235
3236 if (!cur->removal_mark)
3237 continue;
3238
3239 kfree_skb(cur->skb);
3240 cur->skb = NULL;
3241
3242 pktgen_remove_device(t, cur);
3243
3244 break;
3245 }
3246}
3247
3248static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3249{
3250 struct list_head *q, *n;
3251 struct pktgen_dev *cur;
3252
3253 func_enter();
3254
3255 /* Remove all devices, free mem */
3256
3257 list_for_each_safe(q, n, &t->if_list) {
3258 cur = list_entry(q, struct pktgen_dev, list);
3259
3260 kfree_skb(cur->skb);
3261 cur->skb = NULL;
3262
3263 pktgen_remove_device(t, cur);
3264 }
3265}
3266
3267static void pktgen_rem_thread(struct pktgen_thread *t)
3268{
3269 /* Remove from the thread list */
3270 remove_proc_entry(t->tsk->comm, t->net->proc_dir);
3271}
3272
3273static void pktgen_resched(struct pktgen_dev *pkt_dev)
3274{
3275 ktime_t idle_start = ktime_get();
3276 schedule();
3277 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3278}
3279
3280static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3281{
3282 ktime_t idle_start = ktime_get();
3283
3284 while (refcount_read(&(pkt_dev->skb->users)) != 1) {
3285 if (signal_pending(current))
3286 break;
3287
3288 if (need_resched())
3289 pktgen_resched(pkt_dev);
3290 else
3291 cpu_relax();
3292 }
3293 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3294}
3295
3296static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3297{
3298 unsigned int burst = READ_ONCE(pkt_dev->burst);
3299 struct net_device *odev = pkt_dev->odev;
3300 struct netdev_queue *txq;
3301 struct sk_buff *skb;
3302 int ret;
3303
3304 /* If device is offline, then don't send */
3305 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3306 pktgen_stop_device(pkt_dev);
3307 return;
3308 }
3309
3310 /* This is max DELAY, this has special meaning of
3311 * "never transmit"
3312 */
3313 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3314 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
3315 return;
3316 }
3317
3318 /* If no skb or clone count exhausted then get new one */
3319 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3320 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3321 /* build a new pkt */
3322 kfree_skb(pkt_dev->skb);
3323
3324 pkt_dev->skb = fill_packet(odev, pkt_dev);
3325 if (pkt_dev->skb == NULL) {
3326 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3327 schedule();
3328 pkt_dev->clone_count--; /* back out increment, OOM */
3329 return;
3330 }
3331 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3332 pkt_dev->clone_count = 0; /* reset counter */
3333 }
3334
3335 if (pkt_dev->delay && pkt_dev->last_ok)
3336 spin(pkt_dev, pkt_dev->next_tx);
3337
3338 if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) {
3339 skb = pkt_dev->skb;
3340 skb->protocol = eth_type_trans(skb, skb->dev);
3341 refcount_add(burst, &skb->users);
3342 local_bh_disable();
3343 do {
3344 ret = netif_receive_skb(skb);
3345 if (ret == NET_RX_DROP)
3346 pkt_dev->errors++;
3347 pkt_dev->sofar++;
3348 pkt_dev->seq_num++;
3349 if (refcount_read(&skb->users) != burst) {
3350 /* skb was queued by rps/rfs or taps,
3351 * so cannot reuse this skb
3352 */
3353 WARN_ON(refcount_sub_and_test(burst - 1, &skb->users));
3354 /* get out of the loop and wait
3355 * until skb is consumed
3356 */
3357 break;
3358 }
3359 /* skb was 'freed' by stack, so clean few
3360 * bits and reuse it
3361 */
3362 skb_reset_tc(skb);
3363 } while (--burst > 0);
3364 goto out; /* Skips xmit_mode M_START_XMIT */
3365 } else if (pkt_dev->xmit_mode == M_QUEUE_XMIT) {
3366 local_bh_disable();
3367 refcount_inc(&pkt_dev->skb->users);
3368
3369 ret = dev_queue_xmit(pkt_dev->skb);
3370 switch (ret) {
3371 case NET_XMIT_SUCCESS:
3372 pkt_dev->sofar++;
3373 pkt_dev->seq_num++;
3374 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3375 break;
3376 case NET_XMIT_DROP:
3377 case NET_XMIT_CN:
3378 /* These are all valid return codes for a qdisc but
3379 * indicate packets are being dropped or will likely
3380 * be dropped soon.
3381 */
3382 case NETDEV_TX_BUSY:
3383 /* qdisc may call dev_hard_start_xmit directly in cases
3384 * where no queues exist e.g. loopback device, virtual
3385 * devices, etc. In this case we need to handle
3386 * NETDEV_TX_ codes.
3387 */
3388 default:
3389 pkt_dev->errors++;
3390 net_info_ratelimited("%s xmit error: %d\n",
3391 pkt_dev->odevname, ret);
3392 break;
3393 }
3394 goto out;
3395 }
3396
3397 txq = skb_get_tx_queue(odev, pkt_dev->skb);
3398
3399 local_bh_disable();
3400
3401 HARD_TX_LOCK(odev, txq, smp_processor_id());
3402
3403 if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) {
3404 ret = NETDEV_TX_BUSY;
3405 pkt_dev->last_ok = 0;
3406 goto unlock;
3407 }
3408 refcount_add(burst, &pkt_dev->skb->users);
3409
3410xmit_more:
3411 ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0);
3412
3413 switch (ret) {
3414 case NETDEV_TX_OK:
3415 pkt_dev->last_ok = 1;
3416 pkt_dev->sofar++;
3417 pkt_dev->seq_num++;
3418 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3419 if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq))
3420 goto xmit_more;
3421 break;
3422 case NET_XMIT_DROP:
3423 case NET_XMIT_CN:
3424 /* skb has been consumed */
3425 pkt_dev->errors++;
3426 break;
3427 default: /* Drivers are not supposed to return other values! */
3428 net_info_ratelimited("%s xmit error: %d\n",
3429 pkt_dev->odevname, ret);
3430 pkt_dev->errors++;
3431 /* fallthru */
3432 case NETDEV_TX_BUSY:
3433 /* Retry it next time */
3434 refcount_dec(&(pkt_dev->skb->users));
3435 pkt_dev->last_ok = 0;
3436 }
3437 if (unlikely(burst))
3438 WARN_ON(refcount_sub_and_test(burst, &pkt_dev->skb->users));
3439unlock:
3440 HARD_TX_UNLOCK(odev, txq);
3441
3442out:
3443 local_bh_enable();
3444
3445 /* If pkt_dev->count is zero, then run forever */
3446 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3447 pktgen_wait_for_skb(pkt_dev);
3448
3449 /* Done with this */
3450 pktgen_stop_device(pkt_dev);
3451 }
3452}
3453
3454/*
3455 * Main loop of the thread goes here
3456 */
3457
3458static int pktgen_thread_worker(void *arg)
3459{
3460 DEFINE_WAIT(wait);
3461 struct pktgen_thread *t = arg;
3462 struct pktgen_dev *pkt_dev = NULL;
3463 int cpu = t->cpu;
3464
3465 BUG_ON(smp_processor_id() != cpu);
3466
3467 init_waitqueue_head(&t->queue);
3468 complete(&t->start_done);
3469
3470 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3471
3472 set_freezable();
3473
3474 while (!kthread_should_stop()) {
3475 pkt_dev = next_to_run(t);
3476
3477 if (unlikely(!pkt_dev && t->control == 0)) {
3478 if (t->net->pktgen_exiting)
3479 break;
3480 wait_event_interruptible_timeout(t->queue,
3481 t->control != 0,
3482 HZ/10);
3483 try_to_freeze();
3484 continue;
3485 }
3486
3487 if (likely(pkt_dev)) {
3488 pktgen_xmit(pkt_dev);
3489
3490 if (need_resched())
3491 pktgen_resched(pkt_dev);
3492 else
3493 cpu_relax();
3494 }
3495
3496 if (t->control & T_STOP) {
3497 pktgen_stop(t);
3498 t->control &= ~(T_STOP);
3499 }
3500
3501 if (t->control & T_RUN) {
3502 pktgen_run(t);
3503 t->control &= ~(T_RUN);
3504 }
3505
3506 if (t->control & T_REMDEVALL) {
3507 pktgen_rem_all_ifs(t);
3508 t->control &= ~(T_REMDEVALL);
3509 }
3510
3511 if (t->control & T_REMDEV) {
3512 pktgen_rem_one_if(t);
3513 t->control &= ~(T_REMDEV);
3514 }
3515
3516 try_to_freeze();
3517 }
3518
3519 pr_debug("%s stopping all device\n", t->tsk->comm);
3520 pktgen_stop(t);
3521
3522 pr_debug("%s removing all device\n", t->tsk->comm);
3523 pktgen_rem_all_ifs(t);
3524
3525 pr_debug("%s removing thread\n", t->tsk->comm);
3526 pktgen_rem_thread(t);
3527
3528 return 0;
3529}
3530
3531static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3532 const char *ifname, bool exact)
3533{
3534 struct pktgen_dev *p, *pkt_dev = NULL;
3535 size_t len = strlen(ifname);
3536
3537 rcu_read_lock();
3538 list_for_each_entry_rcu(p, &t->if_list, list)
3539 if (strncmp(p->odevname, ifname, len) == 0) {
3540 if (p->odevname[len]) {
3541 if (exact || p->odevname[len] != '@')
3542 continue;
3543 }
3544 pkt_dev = p;
3545 break;
3546 }
3547
3548 rcu_read_unlock();
3549 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3550 return pkt_dev;
3551}
3552
3553/*
3554 * Adds a dev at front of if_list.
3555 */
3556
3557static int add_dev_to_thread(struct pktgen_thread *t,
3558 struct pktgen_dev *pkt_dev)
3559{
3560 int rv = 0;
3561
3562 /* This function cannot be called concurrently, as its called
3563 * under pktgen_thread_lock mutex, but it can run from
3564 * userspace on another CPU than the kthread. The if_lock()
3565 * is used here to sync with concurrent instances of
3566 * _rem_dev_from_if_list() invoked via kthread, which is also
3567 * updating the if_list */
3568 if_lock(t);
3569
3570 if (pkt_dev->pg_thread) {
3571 pr_err("ERROR: already assigned to a thread\n");
3572 rv = -EBUSY;
3573 goto out;
3574 }
3575
3576 pkt_dev->running = 0;
3577 pkt_dev->pg_thread = t;
3578 list_add_rcu(&pkt_dev->list, &t->if_list);
3579
3580out:
3581 if_unlock(t);
3582 return rv;
3583}
3584
3585/* Called under thread lock */
3586
3587static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3588{
3589 struct pktgen_dev *pkt_dev;
3590 int err;
3591 int node = cpu_to_node(t->cpu);
3592
3593 /* We don't allow a device to be on several threads */
3594
3595 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND);
3596 if (pkt_dev) {
3597 pr_err("ERROR: interface already used\n");
3598 return -EBUSY;
3599 }
3600
3601 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3602 if (!pkt_dev)
3603 return -ENOMEM;
3604
3605 strcpy(pkt_dev->odevname, ifname);
3606 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3607 node);
3608 if (pkt_dev->flows == NULL) {
3609 kfree(pkt_dev);
3610 return -ENOMEM;
3611 }
3612
3613 pkt_dev->removal_mark = 0;
3614 pkt_dev->nfrags = 0;
3615 pkt_dev->delay = pg_delay_d;
3616 pkt_dev->count = pg_count_d;
3617 pkt_dev->sofar = 0;
3618 pkt_dev->udp_src_min = 9; /* sink port */
3619 pkt_dev->udp_src_max = 9;
3620 pkt_dev->udp_dst_min = 9;
3621 pkt_dev->udp_dst_max = 9;
3622 pkt_dev->vlan_p = 0;
3623 pkt_dev->vlan_cfi = 0;
3624 pkt_dev->vlan_id = 0xffff;
3625 pkt_dev->svlan_p = 0;
3626 pkt_dev->svlan_cfi = 0;
3627 pkt_dev->svlan_id = 0xffff;
3628 pkt_dev->burst = 1;
3629 pkt_dev->node = -1;
3630
3631 err = pktgen_setup_dev(t->net, pkt_dev, ifname);
3632 if (err)
3633 goto out1;
3634 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3635 pkt_dev->clone_skb = pg_clone_skb_d;
3636
3637 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir,
3638 &pktgen_if_fops, pkt_dev);
3639 if (!pkt_dev->entry) {
3640 pr_err("cannot create %s/%s procfs entry\n",
3641 PG_PROC_DIR, ifname);
3642 err = -EINVAL;
3643 goto out2;
3644 }
3645#ifdef CONFIG_XFRM
3646 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3647 pkt_dev->ipsproto = IPPROTO_ESP;
3648
3649 /* xfrm tunnel mode needs additional dst to extract outter
3650 * ip header protocol/ttl/id field, here creat a phony one.
3651 * instead of looking for a valid rt, which definitely hurting
3652 * performance under such circumstance.
3653 */
3654 pkt_dev->dstops.family = AF_INET;
3655 pkt_dev->xdst.u.dst.dev = pkt_dev->odev;
3656 dst_init_metrics(&pkt_dev->xdst.u.dst, pktgen_dst_metrics, false);
3657 pkt_dev->xdst.child = &pkt_dev->xdst.u.dst;
3658 pkt_dev->xdst.u.dst.ops = &pkt_dev->dstops;
3659#endif
3660
3661 return add_dev_to_thread(t, pkt_dev);
3662out2:
3663 dev_put(pkt_dev->odev);
3664out1:
3665#ifdef CONFIG_XFRM
3666 free_SAs(pkt_dev);
3667#endif
3668 vfree(pkt_dev->flows);
3669 kfree(pkt_dev);
3670 return err;
3671}
3672
3673static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
3674{
3675 struct pktgen_thread *t;
3676 struct proc_dir_entry *pe;
3677 struct task_struct *p;
3678
3679 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3680 cpu_to_node(cpu));
3681 if (!t) {
3682 pr_err("ERROR: out of memory, can't create new thread\n");
3683 return -ENOMEM;
3684 }
3685
3686 mutex_init(&t->if_lock);
3687 t->cpu = cpu;
3688
3689 INIT_LIST_HEAD(&t->if_list);
3690
3691 list_add_tail(&t->th_list, &pn->pktgen_threads);
3692 init_completion(&t->start_done);
3693
3694 p = kthread_create_on_node(pktgen_thread_worker,
3695 t,
3696 cpu_to_node(cpu),
3697 "kpktgend_%d", cpu);
3698 if (IS_ERR(p)) {
3699 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3700 list_del(&t->th_list);
3701 kfree(t);
3702 return PTR_ERR(p);
3703 }
3704 kthread_bind(p, cpu);
3705 t->tsk = p;
3706
3707 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
3708 &pktgen_thread_fops, t);
3709 if (!pe) {
3710 pr_err("cannot create %s/%s procfs entry\n",
3711 PG_PROC_DIR, t->tsk->comm);
3712 kthread_stop(p);
3713 list_del(&t->th_list);
3714 kfree(t);
3715 return -EINVAL;
3716 }
3717
3718 t->net = pn;
3719 get_task_struct(p);
3720 wake_up_process(p);
3721 wait_for_completion(&t->start_done);
3722
3723 return 0;
3724}
3725
3726/*
3727 * Removes a device from the thread if_list.
3728 */
3729static void _rem_dev_from_if_list(struct pktgen_thread *t,
3730 struct pktgen_dev *pkt_dev)
3731{
3732 struct list_head *q, *n;
3733 struct pktgen_dev *p;
3734
3735 if_lock(t);
3736 list_for_each_safe(q, n, &t->if_list) {
3737 p = list_entry(q, struct pktgen_dev, list);
3738 if (p == pkt_dev)
3739 list_del_rcu(&p->list);
3740 }
3741 if_unlock(t);
3742}
3743
3744static int pktgen_remove_device(struct pktgen_thread *t,
3745 struct pktgen_dev *pkt_dev)
3746{
3747 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3748
3749 if (pkt_dev->running) {
3750 pr_warn("WARNING: trying to remove a running interface, stopping it now\n");
3751 pktgen_stop_device(pkt_dev);
3752 }
3753
3754 /* Dis-associate from the interface */
3755
3756 if (pkt_dev->odev) {
3757 dev_put(pkt_dev->odev);
3758 pkt_dev->odev = NULL;
3759 }
3760
3761 /* Remove proc before if_list entry, because add_device uses
3762 * list to determine if interface already exist, avoid race
3763 * with proc_create_data() */
3764 proc_remove(pkt_dev->entry);
3765
3766 /* And update the thread if_list */
3767 _rem_dev_from_if_list(t, pkt_dev);
3768
3769#ifdef CONFIG_XFRM
3770 free_SAs(pkt_dev);
3771#endif
3772 vfree(pkt_dev->flows);
3773 if (pkt_dev->page)
3774 put_page(pkt_dev->page);
3775 kfree_rcu(pkt_dev, rcu);
3776 return 0;
3777}
3778
3779static int __net_init pg_net_init(struct net *net)
3780{
3781 struct pktgen_net *pn = net_generic(net, pg_net_id);
3782 struct proc_dir_entry *pe;
3783 int cpu, ret = 0;
3784
3785 pn->net = net;
3786 INIT_LIST_HEAD(&pn->pktgen_threads);
3787 pn->pktgen_exiting = false;
3788 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net);
3789 if (!pn->proc_dir) {
3790 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR);
3791 return -ENODEV;
3792 }
3793 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops);
3794 if (pe == NULL) {
3795 pr_err("cannot create %s procfs entry\n", PGCTRL);
3796 ret = -EINVAL;
3797 goto remove;
3798 }
3799
3800 for_each_online_cpu(cpu) {
3801 int err;
3802
3803 err = pktgen_create_thread(cpu, pn);
3804 if (err)
3805 pr_warn("Cannot create thread for cpu %d (%d)\n",
3806 cpu, err);
3807 }
3808
3809 if (list_empty(&pn->pktgen_threads)) {
3810 pr_err("Initialization failed for all threads\n");
3811 ret = -ENODEV;
3812 goto remove_entry;
3813 }
3814
3815 return 0;
3816
3817remove_entry:
3818 remove_proc_entry(PGCTRL, pn->proc_dir);
3819remove:
3820 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3821 return ret;
3822}
3823
3824static void __net_exit pg_net_exit(struct net *net)
3825{
3826 struct pktgen_net *pn = net_generic(net, pg_net_id);
3827 struct pktgen_thread *t;
3828 struct list_head *q, *n;
3829 LIST_HEAD(list);
3830
3831 /* Stop all interfaces & threads */
3832 pn->pktgen_exiting = true;
3833
3834 mutex_lock(&pktgen_thread_lock);
3835 list_splice_init(&pn->pktgen_threads, &list);
3836 mutex_unlock(&pktgen_thread_lock);
3837
3838 list_for_each_safe(q, n, &list) {
3839 t = list_entry(q, struct pktgen_thread, th_list);
3840 list_del(&t->th_list);
3841 kthread_stop(t->tsk);
3842 put_task_struct(t->tsk);
3843 kfree(t);
3844 }
3845
3846 remove_proc_entry(PGCTRL, pn->proc_dir);
3847 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3848}
3849
3850static struct pernet_operations pg_net_ops = {
3851 .init = pg_net_init,
3852 .exit = pg_net_exit,
3853 .id = &pg_net_id,
3854 .size = sizeof(struct pktgen_net),
3855};
3856
3857static int __init pg_init(void)
3858{
3859 int ret = 0;
3860
3861 pr_info("%s", version);
3862 ret = register_pernet_subsys(&pg_net_ops);
3863 if (ret)
3864 return ret;
3865 ret = register_netdevice_notifier(&pktgen_notifier_block);
3866 if (ret)
3867 unregister_pernet_subsys(&pg_net_ops);
3868
3869 return ret;
3870}
3871
3872static void __exit pg_cleanup(void)
3873{
3874 unregister_netdevice_notifier(&pktgen_notifier_block);
3875 unregister_pernet_subsys(&pg_net_ops);
3876 /* Don't need rcu_barrier() due to use of kfree_rcu() */
3877}
3878
3879module_init(pg_init);
3880module_exit(pg_cleanup);
3881
3882MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3883MODULE_DESCRIPTION("Packet Generator tool");
3884MODULE_LICENSE("GPL");
3885MODULE_VERSION(VERSION);
3886module_param(pg_count_d, int, 0);
3887MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3888module_param(pg_delay_d, int, 0);
3889MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3890module_param(pg_clone_skb_d, int, 0);
3891MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3892module_param(debug, int, 0);
3893MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");