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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/addrconf.h>
164#ifdef CONFIG_XFRM
165#include <net/xfrm.h>
166#endif
167#include <asm/byteorder.h>
168#include <linux/rcupdate.h>
169#include <linux/bitops.h>
170#include <linux/io.h>
171#include <linux/timex.h>
172#include <linux/uaccess.h>
173#include <asm/dma.h>
174#include <asm/div64.h> /* do_div */
175
176#define VERSION "2.74"
177#define IP_NAME_SZ 32
178#define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
179#define MPLS_STACK_BOTTOM htonl(0x00000100)
180
181#define func_enter() pr_debug("entering %s\n", __func__);
182
183/* Device flag bits */
184#define F_IPSRC_RND (1<<0) /* IP-Src Random */
185#define F_IPDST_RND (1<<1) /* IP-Dst Random */
186#define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
187#define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
188#define F_MACSRC_RND (1<<4) /* MAC-Src Random */
189#define F_MACDST_RND (1<<5) /* MAC-Dst Random */
190#define F_TXSIZE_RND (1<<6) /* Transmit size is random */
191#define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
192#define F_MPLS_RND (1<<8) /* Random MPLS labels */
193#define F_VID_RND (1<<9) /* Random VLAN ID */
194#define F_SVID_RND (1<<10) /* Random SVLAN ID */
195#define F_FLOW_SEQ (1<<11) /* Sequential flows */
196#define F_IPSEC_ON (1<<12) /* ipsec on for flows */
197#define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
198#define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
199#define F_NODE (1<<15) /* Node memory alloc*/
200
201/* Thread control flag bits */
202#define T_STOP (1<<0) /* Stop run */
203#define T_RUN (1<<1) /* Start run */
204#define T_REMDEVALL (1<<2) /* Remove all devs */
205#define T_REMDEV (1<<3) /* Remove one dev */
206
207/* If lock -- can be removed after some work */
208#define if_lock(t) spin_lock(&(t->if_lock));
209#define if_unlock(t) spin_unlock(&(t->if_lock));
210
211/* Used to help with determining the pkts on receive */
212#define PKTGEN_MAGIC 0xbe9be955
213#define PG_PROC_DIR "pktgen"
214#define PGCTRL "pgctrl"
215static struct proc_dir_entry *pg_proc_dir;
216
217#define MAX_CFLOWS 65536
218
219#define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
220#define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
221
222struct flow_state {
223 __be32 cur_daddr;
224 int count;
225#ifdef CONFIG_XFRM
226 struct xfrm_state *x;
227#endif
228 __u32 flags;
229};
230
231/* flow flag bits */
232#define F_INIT (1<<0) /* flow has been initialized */
233
234struct pktgen_dev {
235 /*
236 * Try to keep frequent/infrequent used vars. separated.
237 */
238 struct proc_dir_entry *entry; /* proc file */
239 struct pktgen_thread *pg_thread;/* the owner */
240 struct list_head list; /* chaining in the thread's run-queue */
241
242 int running; /* if false, the test will stop */
243
244 /* If min != max, then we will either do a linear iteration, or
245 * we will do a random selection from within the range.
246 */
247 __u32 flags;
248 int removal_mark; /* non-zero => the device is marked for
249 * removal by worker thread */
250
251 int min_pkt_size; /* = ETH_ZLEN; */
252 int max_pkt_size; /* = ETH_ZLEN; */
253 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
254 int nfrags;
255 struct page *page;
256 u64 delay; /* nano-seconds */
257
258 __u64 count; /* Default No packets to send */
259 __u64 sofar; /* How many pkts we've sent so far */
260 __u64 tx_bytes; /* How many bytes we've transmitted */
261 __u64 errors; /* Errors when trying to transmit, */
262
263 /* runtime counters relating to clone_skb */
264
265 __u64 allocated_skbs;
266 __u32 clone_count;
267 int last_ok; /* Was last skb sent?
268 * Or a failed transmit of some sort?
269 * This will keep sequence numbers in order
270 */
271 ktime_t next_tx;
272 ktime_t started_at;
273 ktime_t stopped_at;
274 u64 idle_acc; /* nano-seconds */
275
276 __u32 seq_num;
277
278 int clone_skb; /*
279 * Use multiple SKBs during packet gen.
280 * If this number is greater than 1, then
281 * that many copies of the same packet will be
282 * sent before a new packet is allocated.
283 * If you want to send 1024 identical packets
284 * before creating a new packet,
285 * set clone_skb to 1024.
286 */
287
288 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
289 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
290 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
291 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
292
293 struct in6_addr in6_saddr;
294 struct in6_addr in6_daddr;
295 struct in6_addr cur_in6_daddr;
296 struct in6_addr cur_in6_saddr;
297 /* For ranges */
298 struct in6_addr min_in6_daddr;
299 struct in6_addr max_in6_daddr;
300 struct in6_addr min_in6_saddr;
301 struct in6_addr max_in6_saddr;
302
303 /* If we're doing ranges, random or incremental, then this
304 * defines the min/max for those ranges.
305 */
306 __be32 saddr_min; /* inclusive, source IP address */
307 __be32 saddr_max; /* exclusive, source IP address */
308 __be32 daddr_min; /* inclusive, dest IP address */
309 __be32 daddr_max; /* exclusive, dest IP address */
310
311 __u16 udp_src_min; /* inclusive, source UDP port */
312 __u16 udp_src_max; /* exclusive, source UDP port */
313 __u16 udp_dst_min; /* inclusive, dest UDP port */
314 __u16 udp_dst_max; /* exclusive, dest UDP port */
315
316 /* DSCP + ECN */
317 __u8 tos; /* six MSB of (former) IPv4 TOS
318 are for dscp codepoint */
319 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
320 (see RFC 3260, sec. 4) */
321
322 /* MPLS */
323 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
324 __be32 labels[MAX_MPLS_LABELS];
325
326 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
327 __u8 vlan_p;
328 __u8 vlan_cfi;
329 __u16 vlan_id; /* 0xffff means no vlan tag */
330
331 __u8 svlan_p;
332 __u8 svlan_cfi;
333 __u16 svlan_id; /* 0xffff means no svlan tag */
334
335 __u32 src_mac_count; /* How many MACs to iterate through */
336 __u32 dst_mac_count; /* How many MACs to iterate through */
337
338 unsigned char dst_mac[ETH_ALEN];
339 unsigned char src_mac[ETH_ALEN];
340
341 __u32 cur_dst_mac_offset;
342 __u32 cur_src_mac_offset;
343 __be32 cur_saddr;
344 __be32 cur_daddr;
345 __u16 ip_id;
346 __u16 cur_udp_dst;
347 __u16 cur_udp_src;
348 __u16 cur_queue_map;
349 __u32 cur_pkt_size;
350 __u32 last_pkt_size;
351
352 __u8 hh[14];
353 /* = {
354 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
355
356 We fill in SRC address later
357 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
358 0x08, 0x00
359 };
360 */
361 __u16 pad; /* pad out the hh struct to an even 16 bytes */
362
363 struct sk_buff *skb; /* skb we are to transmit next, used for when we
364 * are transmitting the same one multiple times
365 */
366 struct net_device *odev; /* The out-going device.
367 * Note that the device should have it's
368 * pg_info pointer pointing back to this
369 * device.
370 * Set when the user specifies the out-going
371 * device name (not when the inject is
372 * started as it used to do.)
373 */
374 char odevname[32];
375 struct flow_state *flows;
376 unsigned cflows; /* Concurrent flows (config) */
377 unsigned lflow; /* Flow length (config) */
378 unsigned nflows; /* accumulated flows (stats) */
379 unsigned curfl; /* current sequenced flow (state)*/
380
381 u16 queue_map_min;
382 u16 queue_map_max;
383 __u32 skb_priority; /* skb priority field */
384 int node; /* Memory node */
385
386#ifdef CONFIG_XFRM
387 __u8 ipsmode; /* IPSEC mode (config) */
388 __u8 ipsproto; /* IPSEC type (config) */
389#endif
390 char result[512];
391};
392
393struct pktgen_hdr {
394 __be32 pgh_magic;
395 __be32 seq_num;
396 __be32 tv_sec;
397 __be32 tv_usec;
398};
399
400static bool pktgen_exiting __read_mostly;
401
402struct pktgen_thread {
403 spinlock_t if_lock; /* for list of devices */
404 struct list_head if_list; /* All device here */
405 struct list_head th_list;
406 struct task_struct *tsk;
407 char result[512];
408
409 /* Field for thread to receive "posted" events terminate,
410 stop ifs etc. */
411
412 u32 control;
413 int cpu;
414
415 wait_queue_head_t queue;
416 struct completion start_done;
417};
418
419#define REMOVE 1
420#define FIND 0
421
422static inline ktime_t ktime_now(void)
423{
424 struct timespec ts;
425 ktime_get_ts(&ts);
426
427 return timespec_to_ktime(ts);
428}
429
430/* This works even if 32 bit because of careful byte order choice */
431static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2)
432{
433 return cmp1.tv64 < cmp2.tv64;
434}
435
436static const char version[] =
437 "Packet Generator for packet performance testing. "
438 "Version: " VERSION "\n";
439
440static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
441static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
442static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
443 const char *ifname, bool exact);
444static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
445static void pktgen_run_all_threads(void);
446static void pktgen_reset_all_threads(void);
447static void pktgen_stop_all_threads_ifs(void);
448
449static void pktgen_stop(struct pktgen_thread *t);
450static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
451
452static unsigned int scan_ip6(const char *s, char ip[16]);
453
454/* Module parameters, defaults. */
455static int pg_count_d __read_mostly = 1000;
456static int pg_delay_d __read_mostly;
457static int pg_clone_skb_d __read_mostly;
458static int debug __read_mostly;
459
460static DEFINE_MUTEX(pktgen_thread_lock);
461static LIST_HEAD(pktgen_threads);
462
463static struct notifier_block pktgen_notifier_block = {
464 .notifier_call = pktgen_device_event,
465};
466
467/*
468 * /proc handling functions
469 *
470 */
471
472static int pgctrl_show(struct seq_file *seq, void *v)
473{
474 seq_puts(seq, version);
475 return 0;
476}
477
478static ssize_t pgctrl_write(struct file *file, const char __user *buf,
479 size_t count, loff_t *ppos)
480{
481 int err = 0;
482 char data[128];
483
484 if (!capable(CAP_NET_ADMIN)) {
485 err = -EPERM;
486 goto out;
487 }
488
489 if (count > sizeof(data))
490 count = sizeof(data);
491
492 if (copy_from_user(data, buf, count)) {
493 err = -EFAULT;
494 goto out;
495 }
496 data[count - 1] = 0; /* Make string */
497
498 if (!strcmp(data, "stop"))
499 pktgen_stop_all_threads_ifs();
500
501 else if (!strcmp(data, "start"))
502 pktgen_run_all_threads();
503
504 else if (!strcmp(data, "reset"))
505 pktgen_reset_all_threads();
506
507 else
508 pr_warning("Unknown command: %s\n", data);
509
510 err = count;
511
512out:
513 return err;
514}
515
516static int pgctrl_open(struct inode *inode, struct file *file)
517{
518 return single_open(file, pgctrl_show, PDE(inode)->data);
519}
520
521static const struct file_operations pktgen_fops = {
522 .owner = THIS_MODULE,
523 .open = pgctrl_open,
524 .read = seq_read,
525 .llseek = seq_lseek,
526 .write = pgctrl_write,
527 .release = single_release,
528};
529
530static int pktgen_if_show(struct seq_file *seq, void *v)
531{
532 const struct pktgen_dev *pkt_dev = seq->private;
533 ktime_t stopped;
534 u64 idle;
535
536 seq_printf(seq,
537 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
538 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
539 pkt_dev->max_pkt_size);
540
541 seq_printf(seq,
542 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
543 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
544 pkt_dev->clone_skb, pkt_dev->odevname);
545
546 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
547 pkt_dev->lflow);
548
549 seq_printf(seq,
550 " queue_map_min: %u queue_map_max: %u\n",
551 pkt_dev->queue_map_min,
552 pkt_dev->queue_map_max);
553
554 if (pkt_dev->skb_priority)
555 seq_printf(seq, " skb_priority: %u\n",
556 pkt_dev->skb_priority);
557
558 if (pkt_dev->flags & F_IPV6) {
559 seq_printf(seq,
560 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
561 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
562 &pkt_dev->in6_saddr,
563 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
564 &pkt_dev->in6_daddr,
565 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
566 } else {
567 seq_printf(seq,
568 " dst_min: %s dst_max: %s\n",
569 pkt_dev->dst_min, pkt_dev->dst_max);
570 seq_printf(seq,
571 " src_min: %s src_max: %s\n",
572 pkt_dev->src_min, pkt_dev->src_max);
573 }
574
575 seq_puts(seq, " src_mac: ");
576
577 seq_printf(seq, "%pM ",
578 is_zero_ether_addr(pkt_dev->src_mac) ?
579 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
580
581 seq_printf(seq, "dst_mac: ");
582 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
583
584 seq_printf(seq,
585 " udp_src_min: %d udp_src_max: %d"
586 " udp_dst_min: %d udp_dst_max: %d\n",
587 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
588 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
589
590 seq_printf(seq,
591 " src_mac_count: %d dst_mac_count: %d\n",
592 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
593
594 if (pkt_dev->nr_labels) {
595 unsigned i;
596 seq_printf(seq, " mpls: ");
597 for (i = 0; i < pkt_dev->nr_labels; i++)
598 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
599 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
600 }
601
602 if (pkt_dev->vlan_id != 0xffff)
603 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
604 pkt_dev->vlan_id, pkt_dev->vlan_p,
605 pkt_dev->vlan_cfi);
606
607 if (pkt_dev->svlan_id != 0xffff)
608 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
609 pkt_dev->svlan_id, pkt_dev->svlan_p,
610 pkt_dev->svlan_cfi);
611
612 if (pkt_dev->tos)
613 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
614
615 if (pkt_dev->traffic_class)
616 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
617
618 if (pkt_dev->node >= 0)
619 seq_printf(seq, " node: %d\n", pkt_dev->node);
620
621 seq_printf(seq, " Flags: ");
622
623 if (pkt_dev->flags & F_IPV6)
624 seq_printf(seq, "IPV6 ");
625
626 if (pkt_dev->flags & F_IPSRC_RND)
627 seq_printf(seq, "IPSRC_RND ");
628
629 if (pkt_dev->flags & F_IPDST_RND)
630 seq_printf(seq, "IPDST_RND ");
631
632 if (pkt_dev->flags & F_TXSIZE_RND)
633 seq_printf(seq, "TXSIZE_RND ");
634
635 if (pkt_dev->flags & F_UDPSRC_RND)
636 seq_printf(seq, "UDPSRC_RND ");
637
638 if (pkt_dev->flags & F_UDPDST_RND)
639 seq_printf(seq, "UDPDST_RND ");
640
641 if (pkt_dev->flags & F_MPLS_RND)
642 seq_printf(seq, "MPLS_RND ");
643
644 if (pkt_dev->flags & F_QUEUE_MAP_RND)
645 seq_printf(seq, "QUEUE_MAP_RND ");
646
647 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
648 seq_printf(seq, "QUEUE_MAP_CPU ");
649
650 if (pkt_dev->cflows) {
651 if (pkt_dev->flags & F_FLOW_SEQ)
652 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
653 else
654 seq_printf(seq, "FLOW_RND ");
655 }
656
657#ifdef CONFIG_XFRM
658 if (pkt_dev->flags & F_IPSEC_ON)
659 seq_printf(seq, "IPSEC ");
660#endif
661
662 if (pkt_dev->flags & F_MACSRC_RND)
663 seq_printf(seq, "MACSRC_RND ");
664
665 if (pkt_dev->flags & F_MACDST_RND)
666 seq_printf(seq, "MACDST_RND ");
667
668 if (pkt_dev->flags & F_VID_RND)
669 seq_printf(seq, "VID_RND ");
670
671 if (pkt_dev->flags & F_SVID_RND)
672 seq_printf(seq, "SVID_RND ");
673
674 if (pkt_dev->flags & F_NODE)
675 seq_printf(seq, "NODE_ALLOC ");
676
677 seq_puts(seq, "\n");
678
679 /* not really stopped, more like last-running-at */
680 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at;
681 idle = pkt_dev->idle_acc;
682 do_div(idle, NSEC_PER_USEC);
683
684 seq_printf(seq,
685 "Current:\n pkts-sofar: %llu errors: %llu\n",
686 (unsigned long long)pkt_dev->sofar,
687 (unsigned long long)pkt_dev->errors);
688
689 seq_printf(seq,
690 " started: %lluus stopped: %lluus idle: %lluus\n",
691 (unsigned long long) ktime_to_us(pkt_dev->started_at),
692 (unsigned long long) ktime_to_us(stopped),
693 (unsigned long long) idle);
694
695 seq_printf(seq,
696 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
697 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
698 pkt_dev->cur_src_mac_offset);
699
700 if (pkt_dev->flags & F_IPV6) {
701 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
702 &pkt_dev->cur_in6_saddr,
703 &pkt_dev->cur_in6_daddr);
704 } else
705 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
706 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
707
708 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
709 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
710
711 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
712
713 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
714
715 if (pkt_dev->result[0])
716 seq_printf(seq, "Result: %s\n", pkt_dev->result);
717 else
718 seq_printf(seq, "Result: Idle\n");
719
720 return 0;
721}
722
723
724static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
725 __u32 *num)
726{
727 int i = 0;
728 *num = 0;
729
730 for (; i < maxlen; i++) {
731 int value;
732 char c;
733 *num <<= 4;
734 if (get_user(c, &user_buffer[i]))
735 return -EFAULT;
736 value = hex_to_bin(c);
737 if (value >= 0)
738 *num |= value;
739 else
740 break;
741 }
742 return i;
743}
744
745static int count_trail_chars(const char __user * user_buffer,
746 unsigned int maxlen)
747{
748 int i;
749
750 for (i = 0; i < maxlen; i++) {
751 char c;
752 if (get_user(c, &user_buffer[i]))
753 return -EFAULT;
754 switch (c) {
755 case '\"':
756 case '\n':
757 case '\r':
758 case '\t':
759 case ' ':
760 case '=':
761 break;
762 default:
763 goto done;
764 }
765 }
766done:
767 return i;
768}
769
770static unsigned long num_arg(const char __user * user_buffer,
771 unsigned long maxlen, unsigned long *num)
772{
773 int i;
774 *num = 0;
775
776 for (i = 0; i < maxlen; i++) {
777 char c;
778 if (get_user(c, &user_buffer[i]))
779 return -EFAULT;
780 if ((c >= '0') && (c <= '9')) {
781 *num *= 10;
782 *num += c - '0';
783 } else
784 break;
785 }
786 return i;
787}
788
789static int strn_len(const char __user * user_buffer, unsigned int maxlen)
790{
791 int i;
792
793 for (i = 0; i < maxlen; i++) {
794 char c;
795 if (get_user(c, &user_buffer[i]))
796 return -EFAULT;
797 switch (c) {
798 case '\"':
799 case '\n':
800 case '\r':
801 case '\t':
802 case ' ':
803 goto done_str;
804 break;
805 default:
806 break;
807 }
808 }
809done_str:
810 return i;
811}
812
813static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
814{
815 unsigned n = 0;
816 char c;
817 ssize_t i = 0;
818 int len;
819
820 pkt_dev->nr_labels = 0;
821 do {
822 __u32 tmp;
823 len = hex32_arg(&buffer[i], 8, &tmp);
824 if (len <= 0)
825 return len;
826 pkt_dev->labels[n] = htonl(tmp);
827 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
828 pkt_dev->flags |= F_MPLS_RND;
829 i += len;
830 if (get_user(c, &buffer[i]))
831 return -EFAULT;
832 i++;
833 n++;
834 if (n >= MAX_MPLS_LABELS)
835 return -E2BIG;
836 } while (c == ',');
837
838 pkt_dev->nr_labels = n;
839 return i;
840}
841
842static ssize_t pktgen_if_write(struct file *file,
843 const char __user * user_buffer, size_t count,
844 loff_t * offset)
845{
846 struct seq_file *seq = file->private_data;
847 struct pktgen_dev *pkt_dev = seq->private;
848 int i, max, len;
849 char name[16], valstr[32];
850 unsigned long value = 0;
851 char *pg_result = NULL;
852 int tmp = 0;
853 char buf[128];
854
855 pg_result = &(pkt_dev->result[0]);
856
857 if (count < 1) {
858 pr_warning("wrong command format\n");
859 return -EINVAL;
860 }
861
862 max = count;
863 tmp = count_trail_chars(user_buffer, max);
864 if (tmp < 0) {
865 pr_warning("illegal format\n");
866 return tmp;
867 }
868 i = tmp;
869
870 /* Read variable name */
871
872 len = strn_len(&user_buffer[i], sizeof(name) - 1);
873 if (len < 0)
874 return len;
875
876 memset(name, 0, sizeof(name));
877 if (copy_from_user(name, &user_buffer[i], len))
878 return -EFAULT;
879 i += len;
880
881 max = count - i;
882 len = count_trail_chars(&user_buffer[i], max);
883 if (len < 0)
884 return len;
885
886 i += len;
887
888 if (debug) {
889 size_t copy = min_t(size_t, count, 1023);
890 char tb[copy + 1];
891 if (copy_from_user(tb, user_buffer, copy))
892 return -EFAULT;
893 tb[copy] = 0;
894 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name,
895 (unsigned long)count, tb);
896 }
897
898 if (!strcmp(name, "min_pkt_size")) {
899 len = num_arg(&user_buffer[i], 10, &value);
900 if (len < 0)
901 return len;
902
903 i += len;
904 if (value < 14 + 20 + 8)
905 value = 14 + 20 + 8;
906 if (value != pkt_dev->min_pkt_size) {
907 pkt_dev->min_pkt_size = value;
908 pkt_dev->cur_pkt_size = value;
909 }
910 sprintf(pg_result, "OK: min_pkt_size=%u",
911 pkt_dev->min_pkt_size);
912 return count;
913 }
914
915 if (!strcmp(name, "max_pkt_size")) {
916 len = num_arg(&user_buffer[i], 10, &value);
917 if (len < 0)
918 return len;
919
920 i += len;
921 if (value < 14 + 20 + 8)
922 value = 14 + 20 + 8;
923 if (value != pkt_dev->max_pkt_size) {
924 pkt_dev->max_pkt_size = value;
925 pkt_dev->cur_pkt_size = value;
926 }
927 sprintf(pg_result, "OK: max_pkt_size=%u",
928 pkt_dev->max_pkt_size);
929 return count;
930 }
931
932 /* Shortcut for min = max */
933
934 if (!strcmp(name, "pkt_size")) {
935 len = num_arg(&user_buffer[i], 10, &value);
936 if (len < 0)
937 return len;
938
939 i += len;
940 if (value < 14 + 20 + 8)
941 value = 14 + 20 + 8;
942 if (value != pkt_dev->min_pkt_size) {
943 pkt_dev->min_pkt_size = value;
944 pkt_dev->max_pkt_size = value;
945 pkt_dev->cur_pkt_size = value;
946 }
947 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
948 return count;
949 }
950
951 if (!strcmp(name, "debug")) {
952 len = num_arg(&user_buffer[i], 10, &value);
953 if (len < 0)
954 return len;
955
956 i += len;
957 debug = value;
958 sprintf(pg_result, "OK: debug=%u", debug);
959 return count;
960 }
961
962 if (!strcmp(name, "frags")) {
963 len = num_arg(&user_buffer[i], 10, &value);
964 if (len < 0)
965 return len;
966
967 i += len;
968 pkt_dev->nfrags = value;
969 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
970 return count;
971 }
972 if (!strcmp(name, "delay")) {
973 len = num_arg(&user_buffer[i], 10, &value);
974 if (len < 0)
975 return len;
976
977 i += len;
978 if (value == 0x7FFFFFFF)
979 pkt_dev->delay = ULLONG_MAX;
980 else
981 pkt_dev->delay = (u64)value;
982
983 sprintf(pg_result, "OK: delay=%llu",
984 (unsigned long long) pkt_dev->delay);
985 return count;
986 }
987 if (!strcmp(name, "rate")) {
988 len = num_arg(&user_buffer[i], 10, &value);
989 if (len < 0)
990 return len;
991
992 i += len;
993 if (!value)
994 return len;
995 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
996 if (debug)
997 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
998
999 sprintf(pg_result, "OK: rate=%lu", value);
1000 return count;
1001 }
1002 if (!strcmp(name, "ratep")) {
1003 len = num_arg(&user_buffer[i], 10, &value);
1004 if (len < 0)
1005 return len;
1006
1007 i += len;
1008 if (!value)
1009 return len;
1010 pkt_dev->delay = NSEC_PER_SEC/value;
1011 if (debug)
1012 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1013
1014 sprintf(pg_result, "OK: rate=%lu", value);
1015 return count;
1016 }
1017 if (!strcmp(name, "udp_src_min")) {
1018 len = num_arg(&user_buffer[i], 10, &value);
1019 if (len < 0)
1020 return len;
1021
1022 i += len;
1023 if (value != pkt_dev->udp_src_min) {
1024 pkt_dev->udp_src_min = value;
1025 pkt_dev->cur_udp_src = value;
1026 }
1027 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1028 return count;
1029 }
1030 if (!strcmp(name, "udp_dst_min")) {
1031 len = num_arg(&user_buffer[i], 10, &value);
1032 if (len < 0)
1033 return len;
1034
1035 i += len;
1036 if (value != pkt_dev->udp_dst_min) {
1037 pkt_dev->udp_dst_min = value;
1038 pkt_dev->cur_udp_dst = value;
1039 }
1040 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1041 return count;
1042 }
1043 if (!strcmp(name, "udp_src_max")) {
1044 len = num_arg(&user_buffer[i], 10, &value);
1045 if (len < 0)
1046 return len;
1047
1048 i += len;
1049 if (value != pkt_dev->udp_src_max) {
1050 pkt_dev->udp_src_max = value;
1051 pkt_dev->cur_udp_src = value;
1052 }
1053 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1054 return count;
1055 }
1056 if (!strcmp(name, "udp_dst_max")) {
1057 len = num_arg(&user_buffer[i], 10, &value);
1058 if (len < 0)
1059 return len;
1060
1061 i += len;
1062 if (value != pkt_dev->udp_dst_max) {
1063 pkt_dev->udp_dst_max = value;
1064 pkt_dev->cur_udp_dst = value;
1065 }
1066 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1067 return count;
1068 }
1069 if (!strcmp(name, "clone_skb")) {
1070 len = num_arg(&user_buffer[i], 10, &value);
1071 if (len < 0)
1072 return len;
1073 if ((value > 0) &&
1074 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1075 return -ENOTSUPP;
1076 i += len;
1077 pkt_dev->clone_skb = value;
1078
1079 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1080 return count;
1081 }
1082 if (!strcmp(name, "count")) {
1083 len = num_arg(&user_buffer[i], 10, &value);
1084 if (len < 0)
1085 return len;
1086
1087 i += len;
1088 pkt_dev->count = value;
1089 sprintf(pg_result, "OK: count=%llu",
1090 (unsigned long long)pkt_dev->count);
1091 return count;
1092 }
1093 if (!strcmp(name, "src_mac_count")) {
1094 len = num_arg(&user_buffer[i], 10, &value);
1095 if (len < 0)
1096 return len;
1097
1098 i += len;
1099 if (pkt_dev->src_mac_count != value) {
1100 pkt_dev->src_mac_count = value;
1101 pkt_dev->cur_src_mac_offset = 0;
1102 }
1103 sprintf(pg_result, "OK: src_mac_count=%d",
1104 pkt_dev->src_mac_count);
1105 return count;
1106 }
1107 if (!strcmp(name, "dst_mac_count")) {
1108 len = num_arg(&user_buffer[i], 10, &value);
1109 if (len < 0)
1110 return len;
1111
1112 i += len;
1113 if (pkt_dev->dst_mac_count != value) {
1114 pkt_dev->dst_mac_count = value;
1115 pkt_dev->cur_dst_mac_offset = 0;
1116 }
1117 sprintf(pg_result, "OK: dst_mac_count=%d",
1118 pkt_dev->dst_mac_count);
1119 return count;
1120 }
1121 if (!strcmp(name, "node")) {
1122 len = num_arg(&user_buffer[i], 10, &value);
1123 if (len < 0)
1124 return len;
1125
1126 i += len;
1127
1128 if (node_possible(value)) {
1129 pkt_dev->node = value;
1130 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1131 if (pkt_dev->page) {
1132 put_page(pkt_dev->page);
1133 pkt_dev->page = NULL;
1134 }
1135 }
1136 else
1137 sprintf(pg_result, "ERROR: node not possible");
1138 return count;
1139 }
1140 if (!strcmp(name, "flag")) {
1141 char f[32];
1142 memset(f, 0, 32);
1143 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1144 if (len < 0)
1145 return len;
1146
1147 if (copy_from_user(f, &user_buffer[i], len))
1148 return -EFAULT;
1149 i += len;
1150 if (strcmp(f, "IPSRC_RND") == 0)
1151 pkt_dev->flags |= F_IPSRC_RND;
1152
1153 else if (strcmp(f, "!IPSRC_RND") == 0)
1154 pkt_dev->flags &= ~F_IPSRC_RND;
1155
1156 else if (strcmp(f, "TXSIZE_RND") == 0)
1157 pkt_dev->flags |= F_TXSIZE_RND;
1158
1159 else if (strcmp(f, "!TXSIZE_RND") == 0)
1160 pkt_dev->flags &= ~F_TXSIZE_RND;
1161
1162 else if (strcmp(f, "IPDST_RND") == 0)
1163 pkt_dev->flags |= F_IPDST_RND;
1164
1165 else if (strcmp(f, "!IPDST_RND") == 0)
1166 pkt_dev->flags &= ~F_IPDST_RND;
1167
1168 else if (strcmp(f, "UDPSRC_RND") == 0)
1169 pkt_dev->flags |= F_UDPSRC_RND;
1170
1171 else if (strcmp(f, "!UDPSRC_RND") == 0)
1172 pkt_dev->flags &= ~F_UDPSRC_RND;
1173
1174 else if (strcmp(f, "UDPDST_RND") == 0)
1175 pkt_dev->flags |= F_UDPDST_RND;
1176
1177 else if (strcmp(f, "!UDPDST_RND") == 0)
1178 pkt_dev->flags &= ~F_UDPDST_RND;
1179
1180 else if (strcmp(f, "MACSRC_RND") == 0)
1181 pkt_dev->flags |= F_MACSRC_RND;
1182
1183 else if (strcmp(f, "!MACSRC_RND") == 0)
1184 pkt_dev->flags &= ~F_MACSRC_RND;
1185
1186 else if (strcmp(f, "MACDST_RND") == 0)
1187 pkt_dev->flags |= F_MACDST_RND;
1188
1189 else if (strcmp(f, "!MACDST_RND") == 0)
1190 pkt_dev->flags &= ~F_MACDST_RND;
1191
1192 else if (strcmp(f, "MPLS_RND") == 0)
1193 pkt_dev->flags |= F_MPLS_RND;
1194
1195 else if (strcmp(f, "!MPLS_RND") == 0)
1196 pkt_dev->flags &= ~F_MPLS_RND;
1197
1198 else if (strcmp(f, "VID_RND") == 0)
1199 pkt_dev->flags |= F_VID_RND;
1200
1201 else if (strcmp(f, "!VID_RND") == 0)
1202 pkt_dev->flags &= ~F_VID_RND;
1203
1204 else if (strcmp(f, "SVID_RND") == 0)
1205 pkt_dev->flags |= F_SVID_RND;
1206
1207 else if (strcmp(f, "!SVID_RND") == 0)
1208 pkt_dev->flags &= ~F_SVID_RND;
1209
1210 else if (strcmp(f, "FLOW_SEQ") == 0)
1211 pkt_dev->flags |= F_FLOW_SEQ;
1212
1213 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1214 pkt_dev->flags |= F_QUEUE_MAP_RND;
1215
1216 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1217 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1218
1219 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1220 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1221
1222 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1223 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1224#ifdef CONFIG_XFRM
1225 else if (strcmp(f, "IPSEC") == 0)
1226 pkt_dev->flags |= F_IPSEC_ON;
1227#endif
1228
1229 else if (strcmp(f, "!IPV6") == 0)
1230 pkt_dev->flags &= ~F_IPV6;
1231
1232 else if (strcmp(f, "NODE_ALLOC") == 0)
1233 pkt_dev->flags |= F_NODE;
1234
1235 else if (strcmp(f, "!NODE_ALLOC") == 0)
1236 pkt_dev->flags &= ~F_NODE;
1237
1238 else {
1239 sprintf(pg_result,
1240 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1241 f,
1242 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1243 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n");
1244 return count;
1245 }
1246 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1247 return count;
1248 }
1249 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1250 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1251 if (len < 0)
1252 return len;
1253
1254 if (copy_from_user(buf, &user_buffer[i], len))
1255 return -EFAULT;
1256 buf[len] = 0;
1257 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1258 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1259 strncpy(pkt_dev->dst_min, buf, len);
1260 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1261 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1262 }
1263 if (debug)
1264 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1265 pkt_dev->dst_min);
1266 i += len;
1267 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1268 return count;
1269 }
1270 if (!strcmp(name, "dst_max")) {
1271 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1272 if (len < 0)
1273 return len;
1274
1275
1276 if (copy_from_user(buf, &user_buffer[i], len))
1277 return -EFAULT;
1278
1279 buf[len] = 0;
1280 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1281 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1282 strncpy(pkt_dev->dst_max, buf, len);
1283 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1284 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1285 }
1286 if (debug)
1287 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1288 pkt_dev->dst_max);
1289 i += len;
1290 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1291 return count;
1292 }
1293 if (!strcmp(name, "dst6")) {
1294 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1295 if (len < 0)
1296 return len;
1297
1298 pkt_dev->flags |= F_IPV6;
1299
1300 if (copy_from_user(buf, &user_buffer[i], len))
1301 return -EFAULT;
1302 buf[len] = 0;
1303
1304 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1305 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1306
1307 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1308
1309 if (debug)
1310 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1311
1312 i += len;
1313 sprintf(pg_result, "OK: dst6=%s", buf);
1314 return count;
1315 }
1316 if (!strcmp(name, "dst6_min")) {
1317 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1318 if (len < 0)
1319 return len;
1320
1321 pkt_dev->flags |= F_IPV6;
1322
1323 if (copy_from_user(buf, &user_buffer[i], len))
1324 return -EFAULT;
1325 buf[len] = 0;
1326
1327 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1328 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1329
1330 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1331 &pkt_dev->min_in6_daddr);
1332 if (debug)
1333 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1334
1335 i += len;
1336 sprintf(pg_result, "OK: dst6_min=%s", buf);
1337 return count;
1338 }
1339 if (!strcmp(name, "dst6_max")) {
1340 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1341 if (len < 0)
1342 return len;
1343
1344 pkt_dev->flags |= F_IPV6;
1345
1346 if (copy_from_user(buf, &user_buffer[i], len))
1347 return -EFAULT;
1348 buf[len] = 0;
1349
1350 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1351 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1352
1353 if (debug)
1354 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1355
1356 i += len;
1357 sprintf(pg_result, "OK: dst6_max=%s", buf);
1358 return count;
1359 }
1360 if (!strcmp(name, "src6")) {
1361 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1362 if (len < 0)
1363 return len;
1364
1365 pkt_dev->flags |= F_IPV6;
1366
1367 if (copy_from_user(buf, &user_buffer[i], len))
1368 return -EFAULT;
1369 buf[len] = 0;
1370
1371 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1372 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1373
1374 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1375
1376 if (debug)
1377 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1378
1379 i += len;
1380 sprintf(pg_result, "OK: src6=%s", buf);
1381 return count;
1382 }
1383 if (!strcmp(name, "src_min")) {
1384 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1385 if (len < 0)
1386 return len;
1387
1388 if (copy_from_user(buf, &user_buffer[i], len))
1389 return -EFAULT;
1390 buf[len] = 0;
1391 if (strcmp(buf, pkt_dev->src_min) != 0) {
1392 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1393 strncpy(pkt_dev->src_min, buf, len);
1394 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1395 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1396 }
1397 if (debug)
1398 printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1399 pkt_dev->src_min);
1400 i += len;
1401 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1402 return count;
1403 }
1404 if (!strcmp(name, "src_max")) {
1405 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1406 if (len < 0)
1407 return len;
1408
1409 if (copy_from_user(buf, &user_buffer[i], len))
1410 return -EFAULT;
1411 buf[len] = 0;
1412 if (strcmp(buf, pkt_dev->src_max) != 0) {
1413 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1414 strncpy(pkt_dev->src_max, buf, len);
1415 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1416 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1417 }
1418 if (debug)
1419 printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1420 pkt_dev->src_max);
1421 i += len;
1422 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1423 return count;
1424 }
1425 if (!strcmp(name, "dst_mac")) {
1426 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1427 if (len < 0)
1428 return len;
1429
1430 memset(valstr, 0, sizeof(valstr));
1431 if (copy_from_user(valstr, &user_buffer[i], len))
1432 return -EFAULT;
1433
1434 if (!mac_pton(valstr, pkt_dev->dst_mac))
1435 return -EINVAL;
1436 /* Set up Dest MAC */
1437 memcpy(&pkt_dev->hh[0], pkt_dev->dst_mac, ETH_ALEN);
1438
1439 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1440 return count;
1441 }
1442 if (!strcmp(name, "src_mac")) {
1443 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1444 if (len < 0)
1445 return len;
1446
1447 memset(valstr, 0, sizeof(valstr));
1448 if (copy_from_user(valstr, &user_buffer[i], len))
1449 return -EFAULT;
1450
1451 if (!mac_pton(valstr, pkt_dev->src_mac))
1452 return -EINVAL;
1453 /* Set up Src MAC */
1454 memcpy(&pkt_dev->hh[6], pkt_dev->src_mac, ETH_ALEN);
1455
1456 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1457 return count;
1458 }
1459
1460 if (!strcmp(name, "clear_counters")) {
1461 pktgen_clear_counters(pkt_dev);
1462 sprintf(pg_result, "OK: Clearing counters.\n");
1463 return count;
1464 }
1465
1466 if (!strcmp(name, "flows")) {
1467 len = num_arg(&user_buffer[i], 10, &value);
1468 if (len < 0)
1469 return len;
1470
1471 i += len;
1472 if (value > MAX_CFLOWS)
1473 value = MAX_CFLOWS;
1474
1475 pkt_dev->cflows = value;
1476 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1477 return count;
1478 }
1479
1480 if (!strcmp(name, "flowlen")) {
1481 len = num_arg(&user_buffer[i], 10, &value);
1482 if (len < 0)
1483 return len;
1484
1485 i += len;
1486 pkt_dev->lflow = value;
1487 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1488 return count;
1489 }
1490
1491 if (!strcmp(name, "queue_map_min")) {
1492 len = num_arg(&user_buffer[i], 5, &value);
1493 if (len < 0)
1494 return len;
1495
1496 i += len;
1497 pkt_dev->queue_map_min = value;
1498 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1499 return count;
1500 }
1501
1502 if (!strcmp(name, "queue_map_max")) {
1503 len = num_arg(&user_buffer[i], 5, &value);
1504 if (len < 0)
1505 return len;
1506
1507 i += len;
1508 pkt_dev->queue_map_max = value;
1509 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1510 return count;
1511 }
1512
1513 if (!strcmp(name, "mpls")) {
1514 unsigned n, cnt;
1515
1516 len = get_labels(&user_buffer[i], pkt_dev);
1517 if (len < 0)
1518 return len;
1519 i += len;
1520 cnt = sprintf(pg_result, "OK: mpls=");
1521 for (n = 0; n < pkt_dev->nr_labels; n++)
1522 cnt += sprintf(pg_result + cnt,
1523 "%08x%s", ntohl(pkt_dev->labels[n]),
1524 n == pkt_dev->nr_labels-1 ? "" : ",");
1525
1526 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1527 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1528 pkt_dev->svlan_id = 0xffff;
1529
1530 if (debug)
1531 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1532 }
1533 return count;
1534 }
1535
1536 if (!strcmp(name, "vlan_id")) {
1537 len = num_arg(&user_buffer[i], 4, &value);
1538 if (len < 0)
1539 return len;
1540
1541 i += len;
1542 if (value <= 4095) {
1543 pkt_dev->vlan_id = value; /* turn on VLAN */
1544
1545 if (debug)
1546 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1547
1548 if (debug && pkt_dev->nr_labels)
1549 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1550
1551 pkt_dev->nr_labels = 0; /* turn off MPLS */
1552 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1553 } else {
1554 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1555 pkt_dev->svlan_id = 0xffff;
1556
1557 if (debug)
1558 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1559 }
1560 return count;
1561 }
1562
1563 if (!strcmp(name, "vlan_p")) {
1564 len = num_arg(&user_buffer[i], 1, &value);
1565 if (len < 0)
1566 return len;
1567
1568 i += len;
1569 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1570 pkt_dev->vlan_p = value;
1571 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1572 } else {
1573 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1574 }
1575 return count;
1576 }
1577
1578 if (!strcmp(name, "vlan_cfi")) {
1579 len = num_arg(&user_buffer[i], 1, &value);
1580 if (len < 0)
1581 return len;
1582
1583 i += len;
1584 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1585 pkt_dev->vlan_cfi = value;
1586 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1587 } else {
1588 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1589 }
1590 return count;
1591 }
1592
1593 if (!strcmp(name, "svlan_id")) {
1594 len = num_arg(&user_buffer[i], 4, &value);
1595 if (len < 0)
1596 return len;
1597
1598 i += len;
1599 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1600 pkt_dev->svlan_id = value; /* turn on SVLAN */
1601
1602 if (debug)
1603 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1604
1605 if (debug && pkt_dev->nr_labels)
1606 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1607
1608 pkt_dev->nr_labels = 0; /* turn off MPLS */
1609 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1610 } else {
1611 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1612 pkt_dev->svlan_id = 0xffff;
1613
1614 if (debug)
1615 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1616 }
1617 return count;
1618 }
1619
1620 if (!strcmp(name, "svlan_p")) {
1621 len = num_arg(&user_buffer[i], 1, &value);
1622 if (len < 0)
1623 return len;
1624
1625 i += len;
1626 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1627 pkt_dev->svlan_p = value;
1628 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1629 } else {
1630 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1631 }
1632 return count;
1633 }
1634
1635 if (!strcmp(name, "svlan_cfi")) {
1636 len = num_arg(&user_buffer[i], 1, &value);
1637 if (len < 0)
1638 return len;
1639
1640 i += len;
1641 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1642 pkt_dev->svlan_cfi = value;
1643 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1644 } else {
1645 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1646 }
1647 return count;
1648 }
1649
1650 if (!strcmp(name, "tos")) {
1651 __u32 tmp_value = 0;
1652 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1653 if (len < 0)
1654 return len;
1655
1656 i += len;
1657 if (len == 2) {
1658 pkt_dev->tos = tmp_value;
1659 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1660 } else {
1661 sprintf(pg_result, "ERROR: tos must be 00-ff");
1662 }
1663 return count;
1664 }
1665
1666 if (!strcmp(name, "traffic_class")) {
1667 __u32 tmp_value = 0;
1668 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1669 if (len < 0)
1670 return len;
1671
1672 i += len;
1673 if (len == 2) {
1674 pkt_dev->traffic_class = tmp_value;
1675 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1676 } else {
1677 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1678 }
1679 return count;
1680 }
1681
1682 if (!strcmp(name, "skb_priority")) {
1683 len = num_arg(&user_buffer[i], 9, &value);
1684 if (len < 0)
1685 return len;
1686
1687 i += len;
1688 pkt_dev->skb_priority = value;
1689 sprintf(pg_result, "OK: skb_priority=%i",
1690 pkt_dev->skb_priority);
1691 return count;
1692 }
1693
1694 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1695 return -EINVAL;
1696}
1697
1698static int pktgen_if_open(struct inode *inode, struct file *file)
1699{
1700 return single_open(file, pktgen_if_show, PDE(inode)->data);
1701}
1702
1703static const struct file_operations pktgen_if_fops = {
1704 .owner = THIS_MODULE,
1705 .open = pktgen_if_open,
1706 .read = seq_read,
1707 .llseek = seq_lseek,
1708 .write = pktgen_if_write,
1709 .release = single_release,
1710};
1711
1712static int pktgen_thread_show(struct seq_file *seq, void *v)
1713{
1714 struct pktgen_thread *t = seq->private;
1715 const struct pktgen_dev *pkt_dev;
1716
1717 BUG_ON(!t);
1718
1719 seq_printf(seq, "Running: ");
1720
1721 if_lock(t);
1722 list_for_each_entry(pkt_dev, &t->if_list, list)
1723 if (pkt_dev->running)
1724 seq_printf(seq, "%s ", pkt_dev->odevname);
1725
1726 seq_printf(seq, "\nStopped: ");
1727
1728 list_for_each_entry(pkt_dev, &t->if_list, list)
1729 if (!pkt_dev->running)
1730 seq_printf(seq, "%s ", pkt_dev->odevname);
1731
1732 if (t->result[0])
1733 seq_printf(seq, "\nResult: %s\n", t->result);
1734 else
1735 seq_printf(seq, "\nResult: NA\n");
1736
1737 if_unlock(t);
1738
1739 return 0;
1740}
1741
1742static ssize_t pktgen_thread_write(struct file *file,
1743 const char __user * user_buffer,
1744 size_t count, loff_t * offset)
1745{
1746 struct seq_file *seq = file->private_data;
1747 struct pktgen_thread *t = seq->private;
1748 int i, max, len, ret;
1749 char name[40];
1750 char *pg_result;
1751
1752 if (count < 1) {
1753 // sprintf(pg_result, "Wrong command format");
1754 return -EINVAL;
1755 }
1756
1757 max = count;
1758 len = count_trail_chars(user_buffer, max);
1759 if (len < 0)
1760 return len;
1761
1762 i = len;
1763
1764 /* Read variable name */
1765
1766 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1767 if (len < 0)
1768 return len;
1769
1770 memset(name, 0, sizeof(name));
1771 if (copy_from_user(name, &user_buffer[i], len))
1772 return -EFAULT;
1773 i += len;
1774
1775 max = count - i;
1776 len = count_trail_chars(&user_buffer[i], max);
1777 if (len < 0)
1778 return len;
1779
1780 i += len;
1781
1782 if (debug)
1783 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1784 name, (unsigned long)count);
1785
1786 if (!t) {
1787 pr_err("ERROR: No thread\n");
1788 ret = -EINVAL;
1789 goto out;
1790 }
1791
1792 pg_result = &(t->result[0]);
1793
1794 if (!strcmp(name, "add_device")) {
1795 char f[32];
1796 memset(f, 0, 32);
1797 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1798 if (len < 0) {
1799 ret = len;
1800 goto out;
1801 }
1802 if (copy_from_user(f, &user_buffer[i], len))
1803 return -EFAULT;
1804 i += len;
1805 mutex_lock(&pktgen_thread_lock);
1806 pktgen_add_device(t, f);
1807 mutex_unlock(&pktgen_thread_lock);
1808 ret = count;
1809 sprintf(pg_result, "OK: add_device=%s", f);
1810 goto out;
1811 }
1812
1813 if (!strcmp(name, "rem_device_all")) {
1814 mutex_lock(&pktgen_thread_lock);
1815 t->control |= T_REMDEVALL;
1816 mutex_unlock(&pktgen_thread_lock);
1817 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1818 ret = count;
1819 sprintf(pg_result, "OK: rem_device_all");
1820 goto out;
1821 }
1822
1823 if (!strcmp(name, "max_before_softirq")) {
1824 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1825 ret = count;
1826 goto out;
1827 }
1828
1829 ret = -EINVAL;
1830out:
1831 return ret;
1832}
1833
1834static int pktgen_thread_open(struct inode *inode, struct file *file)
1835{
1836 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1837}
1838
1839static const struct file_operations pktgen_thread_fops = {
1840 .owner = THIS_MODULE,
1841 .open = pktgen_thread_open,
1842 .read = seq_read,
1843 .llseek = seq_lseek,
1844 .write = pktgen_thread_write,
1845 .release = single_release,
1846};
1847
1848/* Think find or remove for NN */
1849static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1850{
1851 struct pktgen_thread *t;
1852 struct pktgen_dev *pkt_dev = NULL;
1853 bool exact = (remove == FIND);
1854
1855 list_for_each_entry(t, &pktgen_threads, th_list) {
1856 pkt_dev = pktgen_find_dev(t, ifname, exact);
1857 if (pkt_dev) {
1858 if (remove) {
1859 if_lock(t);
1860 pkt_dev->removal_mark = 1;
1861 t->control |= T_REMDEV;
1862 if_unlock(t);
1863 }
1864 break;
1865 }
1866 }
1867 return pkt_dev;
1868}
1869
1870/*
1871 * mark a device for removal
1872 */
1873static void pktgen_mark_device(const char *ifname)
1874{
1875 struct pktgen_dev *pkt_dev = NULL;
1876 const int max_tries = 10, msec_per_try = 125;
1877 int i = 0;
1878
1879 mutex_lock(&pktgen_thread_lock);
1880 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1881
1882 while (1) {
1883
1884 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1885 if (pkt_dev == NULL)
1886 break; /* success */
1887
1888 mutex_unlock(&pktgen_thread_lock);
1889 pr_debug("%s: waiting for %s to disappear....\n",
1890 __func__, ifname);
1891 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1892 mutex_lock(&pktgen_thread_lock);
1893
1894 if (++i >= max_tries) {
1895 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1896 __func__, msec_per_try * i, ifname);
1897 break;
1898 }
1899
1900 }
1901
1902 mutex_unlock(&pktgen_thread_lock);
1903}
1904
1905static void pktgen_change_name(struct net_device *dev)
1906{
1907 struct pktgen_thread *t;
1908
1909 list_for_each_entry(t, &pktgen_threads, th_list) {
1910 struct pktgen_dev *pkt_dev;
1911
1912 list_for_each_entry(pkt_dev, &t->if_list, list) {
1913 if (pkt_dev->odev != dev)
1914 continue;
1915
1916 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1917
1918 pkt_dev->entry = proc_create_data(dev->name, 0600,
1919 pg_proc_dir,
1920 &pktgen_if_fops,
1921 pkt_dev);
1922 if (!pkt_dev->entry)
1923 pr_err("can't move proc entry for '%s'\n",
1924 dev->name);
1925 break;
1926 }
1927 }
1928}
1929
1930static int pktgen_device_event(struct notifier_block *unused,
1931 unsigned long event, void *ptr)
1932{
1933 struct net_device *dev = ptr;
1934
1935 if (!net_eq(dev_net(dev), &init_net))
1936 return NOTIFY_DONE;
1937
1938 /* It is OK that we do not hold the group lock right now,
1939 * as we run under the RTNL lock.
1940 */
1941
1942 switch (event) {
1943 case NETDEV_CHANGENAME:
1944 pktgen_change_name(dev);
1945 break;
1946
1947 case NETDEV_UNREGISTER:
1948 pktgen_mark_device(dev->name);
1949 break;
1950 }
1951
1952 return NOTIFY_DONE;
1953}
1954
1955static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev,
1956 const char *ifname)
1957{
1958 char b[IFNAMSIZ+5];
1959 int i;
1960
1961 for (i = 0; ifname[i] != '@'; i++) {
1962 if (i == IFNAMSIZ)
1963 break;
1964
1965 b[i] = ifname[i];
1966 }
1967 b[i] = 0;
1968
1969 return dev_get_by_name(&init_net, b);
1970}
1971
1972
1973/* Associate pktgen_dev with a device. */
1974
1975static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1976{
1977 struct net_device *odev;
1978 int err;
1979
1980 /* Clean old setups */
1981 if (pkt_dev->odev) {
1982 dev_put(pkt_dev->odev);
1983 pkt_dev->odev = NULL;
1984 }
1985
1986 odev = pktgen_dev_get_by_name(pkt_dev, ifname);
1987 if (!odev) {
1988 pr_err("no such netdevice: \"%s\"\n", ifname);
1989 return -ENODEV;
1990 }
1991
1992 if (odev->type != ARPHRD_ETHER) {
1993 pr_err("not an ethernet device: \"%s\"\n", ifname);
1994 err = -EINVAL;
1995 } else if (!netif_running(odev)) {
1996 pr_err("device is down: \"%s\"\n", ifname);
1997 err = -ENETDOWN;
1998 } else {
1999 pkt_dev->odev = odev;
2000 return 0;
2001 }
2002
2003 dev_put(odev);
2004 return err;
2005}
2006
2007/* Read pkt_dev from the interface and set up internal pktgen_dev
2008 * structure to have the right information to create/send packets
2009 */
2010static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2011{
2012 int ntxq;
2013
2014 if (!pkt_dev->odev) {
2015 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2016 sprintf(pkt_dev->result,
2017 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2018 return;
2019 }
2020
2021 /* make sure that we don't pick a non-existing transmit queue */
2022 ntxq = pkt_dev->odev->real_num_tx_queues;
2023
2024 if (ntxq <= pkt_dev->queue_map_min) {
2025 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2026 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2027 pkt_dev->odevname);
2028 pkt_dev->queue_map_min = ntxq - 1;
2029 }
2030 if (pkt_dev->queue_map_max >= ntxq) {
2031 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2032 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2033 pkt_dev->odevname);
2034 pkt_dev->queue_map_max = ntxq - 1;
2035 }
2036
2037 /* Default to the interface's mac if not explicitly set. */
2038
2039 if (is_zero_ether_addr(pkt_dev->src_mac))
2040 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2041
2042 /* Set up Dest MAC */
2043 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2044
2045 /* Set up pkt size */
2046 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2047
2048 if (pkt_dev->flags & F_IPV6) {
2049 /*
2050 * Skip this automatic address setting until locks or functions
2051 * gets exported
2052 */
2053
2054#ifdef NOTNOW
2055 int i, set = 0, err = 1;
2056 struct inet6_dev *idev;
2057
2058 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2059 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2060 set = 1;
2061 break;
2062 }
2063
2064 if (!set) {
2065
2066 /*
2067 * Use linklevel address if unconfigured.
2068 *
2069 * use ipv6_get_lladdr if/when it's get exported
2070 */
2071
2072 rcu_read_lock();
2073 idev = __in6_dev_get(pkt_dev->odev);
2074 if (idev) {
2075 struct inet6_ifaddr *ifp;
2076
2077 read_lock_bh(&idev->lock);
2078 for (ifp = idev->addr_list; ifp;
2079 ifp = ifp->if_next) {
2080 if (ifp->scope == IFA_LINK &&
2081 !(ifp->flags & IFA_F_TENTATIVE)) {
2082 ipv6_addr_copy(&pkt_dev->
2083 cur_in6_saddr,
2084 &ifp->addr);
2085 err = 0;
2086 break;
2087 }
2088 }
2089 read_unlock_bh(&idev->lock);
2090 }
2091 rcu_read_unlock();
2092 if (err)
2093 pr_err("ERROR: IPv6 link address not available\n");
2094 }
2095#endif
2096 } else {
2097 pkt_dev->saddr_min = 0;
2098 pkt_dev->saddr_max = 0;
2099 if (strlen(pkt_dev->src_min) == 0) {
2100
2101 struct in_device *in_dev;
2102
2103 rcu_read_lock();
2104 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2105 if (in_dev) {
2106 if (in_dev->ifa_list) {
2107 pkt_dev->saddr_min =
2108 in_dev->ifa_list->ifa_address;
2109 pkt_dev->saddr_max = pkt_dev->saddr_min;
2110 }
2111 }
2112 rcu_read_unlock();
2113 } else {
2114 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2115 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2116 }
2117
2118 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2119 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2120 }
2121 /* Initialize current values. */
2122 pkt_dev->cur_dst_mac_offset = 0;
2123 pkt_dev->cur_src_mac_offset = 0;
2124 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2125 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2126 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2127 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2128 pkt_dev->nflows = 0;
2129}
2130
2131
2132static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2133{
2134 ktime_t start_time, end_time;
2135 s64 remaining;
2136 struct hrtimer_sleeper t;
2137
2138 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2139 hrtimer_set_expires(&t.timer, spin_until);
2140
2141 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2142 if (remaining <= 0) {
2143 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2144 return;
2145 }
2146
2147 start_time = ktime_now();
2148 if (remaining < 100000)
2149 ndelay(remaining); /* really small just spin */
2150 else {
2151 /* see do_nanosleep */
2152 hrtimer_init_sleeper(&t, current);
2153 do {
2154 set_current_state(TASK_INTERRUPTIBLE);
2155 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2156 if (!hrtimer_active(&t.timer))
2157 t.task = NULL;
2158
2159 if (likely(t.task))
2160 schedule();
2161
2162 hrtimer_cancel(&t.timer);
2163 } while (t.task && pkt_dev->running && !signal_pending(current));
2164 __set_current_state(TASK_RUNNING);
2165 }
2166 end_time = ktime_now();
2167
2168 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2169 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2170}
2171
2172static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2173{
2174 pkt_dev->pkt_overhead = 0;
2175 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2176 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2177 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2178}
2179
2180static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2181{
2182 return !!(pkt_dev->flows[flow].flags & F_INIT);
2183}
2184
2185static inline int f_pick(struct pktgen_dev *pkt_dev)
2186{
2187 int flow = pkt_dev->curfl;
2188
2189 if (pkt_dev->flags & F_FLOW_SEQ) {
2190 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2191 /* reset time */
2192 pkt_dev->flows[flow].count = 0;
2193 pkt_dev->flows[flow].flags = 0;
2194 pkt_dev->curfl += 1;
2195 if (pkt_dev->curfl >= pkt_dev->cflows)
2196 pkt_dev->curfl = 0; /*reset */
2197 }
2198 } else {
2199 flow = random32() % pkt_dev->cflows;
2200 pkt_dev->curfl = flow;
2201
2202 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2203 pkt_dev->flows[flow].count = 0;
2204 pkt_dev->flows[flow].flags = 0;
2205 }
2206 }
2207
2208 return pkt_dev->curfl;
2209}
2210
2211
2212#ifdef CONFIG_XFRM
2213/* If there was already an IPSEC SA, we keep it as is, else
2214 * we go look for it ...
2215*/
2216#define DUMMY_MARK 0
2217static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2218{
2219 struct xfrm_state *x = pkt_dev->flows[flow].x;
2220 if (!x) {
2221 /*slow path: we dont already have xfrm_state*/
2222 x = xfrm_stateonly_find(&init_net, DUMMY_MARK,
2223 (xfrm_address_t *)&pkt_dev->cur_daddr,
2224 (xfrm_address_t *)&pkt_dev->cur_saddr,
2225 AF_INET,
2226 pkt_dev->ipsmode,
2227 pkt_dev->ipsproto, 0);
2228 if (x) {
2229 pkt_dev->flows[flow].x = x;
2230 set_pkt_overhead(pkt_dev);
2231 pkt_dev->pkt_overhead += x->props.header_len;
2232 }
2233
2234 }
2235}
2236#endif
2237static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2238{
2239
2240 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2241 pkt_dev->cur_queue_map = smp_processor_id();
2242
2243 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2244 __u16 t;
2245 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2246 t = random32() %
2247 (pkt_dev->queue_map_max -
2248 pkt_dev->queue_map_min + 1)
2249 + pkt_dev->queue_map_min;
2250 } else {
2251 t = pkt_dev->cur_queue_map + 1;
2252 if (t > pkt_dev->queue_map_max)
2253 t = pkt_dev->queue_map_min;
2254 }
2255 pkt_dev->cur_queue_map = t;
2256 }
2257 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2258}
2259
2260/* Increment/randomize headers according to flags and current values
2261 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2262 */
2263static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2264{
2265 __u32 imn;
2266 __u32 imx;
2267 int flow = 0;
2268
2269 if (pkt_dev->cflows)
2270 flow = f_pick(pkt_dev);
2271
2272 /* Deal with source MAC */
2273 if (pkt_dev->src_mac_count > 1) {
2274 __u32 mc;
2275 __u32 tmp;
2276
2277 if (pkt_dev->flags & F_MACSRC_RND)
2278 mc = random32() % pkt_dev->src_mac_count;
2279 else {
2280 mc = pkt_dev->cur_src_mac_offset++;
2281 if (pkt_dev->cur_src_mac_offset >=
2282 pkt_dev->src_mac_count)
2283 pkt_dev->cur_src_mac_offset = 0;
2284 }
2285
2286 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2287 pkt_dev->hh[11] = tmp;
2288 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2289 pkt_dev->hh[10] = tmp;
2290 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2291 pkt_dev->hh[9] = tmp;
2292 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2293 pkt_dev->hh[8] = tmp;
2294 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2295 pkt_dev->hh[7] = tmp;
2296 }
2297
2298 /* Deal with Destination MAC */
2299 if (pkt_dev->dst_mac_count > 1) {
2300 __u32 mc;
2301 __u32 tmp;
2302
2303 if (pkt_dev->flags & F_MACDST_RND)
2304 mc = random32() % pkt_dev->dst_mac_count;
2305
2306 else {
2307 mc = pkt_dev->cur_dst_mac_offset++;
2308 if (pkt_dev->cur_dst_mac_offset >=
2309 pkt_dev->dst_mac_count) {
2310 pkt_dev->cur_dst_mac_offset = 0;
2311 }
2312 }
2313
2314 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2315 pkt_dev->hh[5] = tmp;
2316 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2317 pkt_dev->hh[4] = tmp;
2318 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2319 pkt_dev->hh[3] = tmp;
2320 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2321 pkt_dev->hh[2] = tmp;
2322 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2323 pkt_dev->hh[1] = tmp;
2324 }
2325
2326 if (pkt_dev->flags & F_MPLS_RND) {
2327 unsigned i;
2328 for (i = 0; i < pkt_dev->nr_labels; i++)
2329 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2330 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2331 ((__force __be32)random32() &
2332 htonl(0x000fffff));
2333 }
2334
2335 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2336 pkt_dev->vlan_id = random32() & (4096-1);
2337 }
2338
2339 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2340 pkt_dev->svlan_id = random32() & (4096 - 1);
2341 }
2342
2343 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2344 if (pkt_dev->flags & F_UDPSRC_RND)
2345 pkt_dev->cur_udp_src = random32() %
2346 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2347 + pkt_dev->udp_src_min;
2348
2349 else {
2350 pkt_dev->cur_udp_src++;
2351 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2352 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2353 }
2354 }
2355
2356 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2357 if (pkt_dev->flags & F_UDPDST_RND) {
2358 pkt_dev->cur_udp_dst = random32() %
2359 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2360 + pkt_dev->udp_dst_min;
2361 } else {
2362 pkt_dev->cur_udp_dst++;
2363 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2364 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2365 }
2366 }
2367
2368 if (!(pkt_dev->flags & F_IPV6)) {
2369
2370 imn = ntohl(pkt_dev->saddr_min);
2371 imx = ntohl(pkt_dev->saddr_max);
2372 if (imn < imx) {
2373 __u32 t;
2374 if (pkt_dev->flags & F_IPSRC_RND)
2375 t = random32() % (imx - imn) + imn;
2376 else {
2377 t = ntohl(pkt_dev->cur_saddr);
2378 t++;
2379 if (t > imx)
2380 t = imn;
2381
2382 }
2383 pkt_dev->cur_saddr = htonl(t);
2384 }
2385
2386 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2387 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2388 } else {
2389 imn = ntohl(pkt_dev->daddr_min);
2390 imx = ntohl(pkt_dev->daddr_max);
2391 if (imn < imx) {
2392 __u32 t;
2393 __be32 s;
2394 if (pkt_dev->flags & F_IPDST_RND) {
2395
2396 t = random32() % (imx - imn) + imn;
2397 s = htonl(t);
2398
2399 while (ipv4_is_loopback(s) ||
2400 ipv4_is_multicast(s) ||
2401 ipv4_is_lbcast(s) ||
2402 ipv4_is_zeronet(s) ||
2403 ipv4_is_local_multicast(s)) {
2404 t = random32() % (imx - imn) + imn;
2405 s = htonl(t);
2406 }
2407 pkt_dev->cur_daddr = s;
2408 } else {
2409 t = ntohl(pkt_dev->cur_daddr);
2410 t++;
2411 if (t > imx) {
2412 t = imn;
2413 }
2414 pkt_dev->cur_daddr = htonl(t);
2415 }
2416 }
2417 if (pkt_dev->cflows) {
2418 pkt_dev->flows[flow].flags |= F_INIT;
2419 pkt_dev->flows[flow].cur_daddr =
2420 pkt_dev->cur_daddr;
2421#ifdef CONFIG_XFRM
2422 if (pkt_dev->flags & F_IPSEC_ON)
2423 get_ipsec_sa(pkt_dev, flow);
2424#endif
2425 pkt_dev->nflows++;
2426 }
2427 }
2428 } else { /* IPV6 * */
2429
2430 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2431 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2432 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2433 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2434 else {
2435 int i;
2436
2437 /* Only random destinations yet */
2438
2439 for (i = 0; i < 4; i++) {
2440 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2441 (((__force __be32)random32() |
2442 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2443 pkt_dev->max_in6_daddr.s6_addr32[i]);
2444 }
2445 }
2446 }
2447
2448 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2449 __u32 t;
2450 if (pkt_dev->flags & F_TXSIZE_RND) {
2451 t = random32() %
2452 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2453 + pkt_dev->min_pkt_size;
2454 } else {
2455 t = pkt_dev->cur_pkt_size + 1;
2456 if (t > pkt_dev->max_pkt_size)
2457 t = pkt_dev->min_pkt_size;
2458 }
2459 pkt_dev->cur_pkt_size = t;
2460 }
2461
2462 set_cur_queue_map(pkt_dev);
2463
2464 pkt_dev->flows[flow].count++;
2465}
2466
2467
2468#ifdef CONFIG_XFRM
2469static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2470{
2471 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2472 int err = 0;
2473
2474 if (!x)
2475 return 0;
2476 /* XXX: we dont support tunnel mode for now until
2477 * we resolve the dst issue */
2478 if (x->props.mode != XFRM_MODE_TRANSPORT)
2479 return 0;
2480
2481 spin_lock(&x->lock);
2482
2483 err = x->outer_mode->output(x, skb);
2484 if (err)
2485 goto error;
2486 err = x->type->output(x, skb);
2487 if (err)
2488 goto error;
2489
2490 x->curlft.bytes += skb->len;
2491 x->curlft.packets++;
2492error:
2493 spin_unlock(&x->lock);
2494 return err;
2495}
2496
2497static void free_SAs(struct pktgen_dev *pkt_dev)
2498{
2499 if (pkt_dev->cflows) {
2500 /* let go of the SAs if we have them */
2501 int i;
2502 for (i = 0; i < pkt_dev->cflows; i++) {
2503 struct xfrm_state *x = pkt_dev->flows[i].x;
2504 if (x) {
2505 xfrm_state_put(x);
2506 pkt_dev->flows[i].x = NULL;
2507 }
2508 }
2509 }
2510}
2511
2512static int process_ipsec(struct pktgen_dev *pkt_dev,
2513 struct sk_buff *skb, __be16 protocol)
2514{
2515 if (pkt_dev->flags & F_IPSEC_ON) {
2516 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2517 int nhead = 0;
2518 if (x) {
2519 int ret;
2520 __u8 *eth;
2521 nhead = x->props.header_len - skb_headroom(skb);
2522 if (nhead > 0) {
2523 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2524 if (ret < 0) {
2525 pr_err("Error expanding ipsec packet %d\n",
2526 ret);
2527 goto err;
2528 }
2529 }
2530
2531 /* ipsec is not expecting ll header */
2532 skb_pull(skb, ETH_HLEN);
2533 ret = pktgen_output_ipsec(skb, pkt_dev);
2534 if (ret) {
2535 pr_err("Error creating ipsec packet %d\n", ret);
2536 goto err;
2537 }
2538 /* restore ll */
2539 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2540 memcpy(eth, pkt_dev->hh, 12);
2541 *(u16 *) ð[12] = protocol;
2542 }
2543 }
2544 return 1;
2545err:
2546 kfree_skb(skb);
2547 return 0;
2548}
2549#endif
2550
2551static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2552{
2553 unsigned i;
2554 for (i = 0; i < pkt_dev->nr_labels; i++)
2555 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2556
2557 mpls--;
2558 *mpls |= MPLS_STACK_BOTTOM;
2559}
2560
2561static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2562 unsigned int prio)
2563{
2564 return htons(id | (cfi << 12) | (prio << 13));
2565}
2566
2567static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2568 int datalen)
2569{
2570 struct timeval timestamp;
2571 struct pktgen_hdr *pgh;
2572
2573 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
2574 datalen -= sizeof(*pgh);
2575
2576 if (pkt_dev->nfrags <= 0) {
2577 memset(skb_put(skb, datalen), 0, datalen);
2578 } else {
2579 int frags = pkt_dev->nfrags;
2580 int i, len;
2581 int frag_len;
2582
2583
2584 if (frags > MAX_SKB_FRAGS)
2585 frags = MAX_SKB_FRAGS;
2586 len = datalen - frags * PAGE_SIZE;
2587 if (len > 0) {
2588 memset(skb_put(skb, len), 0, len);
2589 datalen = frags * PAGE_SIZE;
2590 }
2591
2592 i = 0;
2593 frag_len = (datalen/frags) < PAGE_SIZE ?
2594 (datalen/frags) : PAGE_SIZE;
2595 while (datalen > 0) {
2596 if (unlikely(!pkt_dev->page)) {
2597 int node = numa_node_id();
2598
2599 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2600 node = pkt_dev->node;
2601 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2602 if (!pkt_dev->page)
2603 break;
2604 }
2605 skb_shinfo(skb)->frags[i].page = pkt_dev->page;
2606 get_page(pkt_dev->page);
2607 skb_shinfo(skb)->frags[i].page_offset = 0;
2608 /*last fragment, fill rest of data*/
2609 if (i == (frags - 1))
2610 skb_shinfo(skb)->frags[i].size =
2611 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2612 else
2613 skb_shinfo(skb)->frags[i].size = frag_len;
2614 datalen -= skb_shinfo(skb)->frags[i].size;
2615 skb->len += skb_shinfo(skb)->frags[i].size;
2616 skb->data_len += skb_shinfo(skb)->frags[i].size;
2617 i++;
2618 skb_shinfo(skb)->nr_frags = i;
2619 }
2620 }
2621
2622 /* Stamp the time, and sequence number,
2623 * convert them to network byte order
2624 */
2625 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2626 pgh->seq_num = htonl(pkt_dev->seq_num);
2627
2628 do_gettimeofday(×tamp);
2629 pgh->tv_sec = htonl(timestamp.tv_sec);
2630 pgh->tv_usec = htonl(timestamp.tv_usec);
2631}
2632
2633static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2634 struct pktgen_dev *pkt_dev)
2635{
2636 struct sk_buff *skb = NULL;
2637 __u8 *eth;
2638 struct udphdr *udph;
2639 int datalen, iplen;
2640 struct iphdr *iph;
2641 __be16 protocol = htons(ETH_P_IP);
2642 __be32 *mpls;
2643 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2644 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2645 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2646 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2647 u16 queue_map;
2648
2649 if (pkt_dev->nr_labels)
2650 protocol = htons(ETH_P_MPLS_UC);
2651
2652 if (pkt_dev->vlan_id != 0xffff)
2653 protocol = htons(ETH_P_8021Q);
2654
2655 /* Update any of the values, used when we're incrementing various
2656 * fields.
2657 */
2658 mod_cur_headers(pkt_dev);
2659 queue_map = pkt_dev->cur_queue_map;
2660
2661 datalen = (odev->hard_header_len + 16) & ~0xf;
2662
2663 if (pkt_dev->flags & F_NODE) {
2664 int node;
2665
2666 if (pkt_dev->node >= 0)
2667 node = pkt_dev->node;
2668 else
2669 node = numa_node_id();
2670
2671 skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64
2672 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node);
2673 if (likely(skb)) {
2674 skb_reserve(skb, NET_SKB_PAD);
2675 skb->dev = odev;
2676 }
2677 }
2678 else
2679 skb = __netdev_alloc_skb(odev,
2680 pkt_dev->cur_pkt_size + 64
2681 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2682
2683 if (!skb) {
2684 sprintf(pkt_dev->result, "No memory");
2685 return NULL;
2686 }
2687 prefetchw(skb->data);
2688
2689 skb_reserve(skb, datalen);
2690
2691 /* Reserve for ethernet and IP header */
2692 eth = (__u8 *) skb_push(skb, 14);
2693 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2694 if (pkt_dev->nr_labels)
2695 mpls_push(mpls, pkt_dev);
2696
2697 if (pkt_dev->vlan_id != 0xffff) {
2698 if (pkt_dev->svlan_id != 0xffff) {
2699 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2700 *svlan_tci = build_tci(pkt_dev->svlan_id,
2701 pkt_dev->svlan_cfi,
2702 pkt_dev->svlan_p);
2703 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2704 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2705 }
2706 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2707 *vlan_tci = build_tci(pkt_dev->vlan_id,
2708 pkt_dev->vlan_cfi,
2709 pkt_dev->vlan_p);
2710 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2711 *vlan_encapsulated_proto = htons(ETH_P_IP);
2712 }
2713
2714 skb->network_header = skb->tail;
2715 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2716 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2717 skb_set_queue_mapping(skb, queue_map);
2718 skb->priority = pkt_dev->skb_priority;
2719
2720 iph = ip_hdr(skb);
2721 udph = udp_hdr(skb);
2722
2723 memcpy(eth, pkt_dev->hh, 12);
2724 *(__be16 *) & eth[12] = protocol;
2725
2726 /* Eth + IPh + UDPh + mpls */
2727 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2728 pkt_dev->pkt_overhead;
2729 if (datalen < sizeof(struct pktgen_hdr))
2730 datalen = sizeof(struct pktgen_hdr);
2731
2732 udph->source = htons(pkt_dev->cur_udp_src);
2733 udph->dest = htons(pkt_dev->cur_udp_dst);
2734 udph->len = htons(datalen + 8); /* DATA + udphdr */
2735 udph->check = 0; /* No checksum */
2736
2737 iph->ihl = 5;
2738 iph->version = 4;
2739 iph->ttl = 32;
2740 iph->tos = pkt_dev->tos;
2741 iph->protocol = IPPROTO_UDP; /* UDP */
2742 iph->saddr = pkt_dev->cur_saddr;
2743 iph->daddr = pkt_dev->cur_daddr;
2744 iph->id = htons(pkt_dev->ip_id);
2745 pkt_dev->ip_id++;
2746 iph->frag_off = 0;
2747 iplen = 20 + 8 + datalen;
2748 iph->tot_len = htons(iplen);
2749 iph->check = 0;
2750 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2751 skb->protocol = protocol;
2752 skb->mac_header = (skb->network_header - ETH_HLEN -
2753 pkt_dev->pkt_overhead);
2754 skb->dev = odev;
2755 skb->pkt_type = PACKET_HOST;
2756 pktgen_finalize_skb(pkt_dev, skb, datalen);
2757
2758#ifdef CONFIG_XFRM
2759 if (!process_ipsec(pkt_dev, skb, protocol))
2760 return NULL;
2761#endif
2762
2763 return skb;
2764}
2765
2766/*
2767 * scan_ip6, fmt_ip taken from dietlibc-0.21
2768 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2769 *
2770 * Slightly modified for kernel.
2771 * Should be candidate for net/ipv4/utils.c
2772 * --ro
2773 */
2774
2775static unsigned int scan_ip6(const char *s, char ip[16])
2776{
2777 unsigned int i;
2778 unsigned int len = 0;
2779 unsigned long u;
2780 char suffix[16];
2781 unsigned int prefixlen = 0;
2782 unsigned int suffixlen = 0;
2783 __be32 tmp;
2784 char *pos;
2785
2786 for (i = 0; i < 16; i++)
2787 ip[i] = 0;
2788
2789 for (;;) {
2790 if (*s == ':') {
2791 len++;
2792 if (s[1] == ':') { /* Found "::", skip to part 2 */
2793 s += 2;
2794 len++;
2795 break;
2796 }
2797 s++;
2798 }
2799
2800 u = simple_strtoul(s, &pos, 16);
2801 i = pos - s;
2802 if (!i)
2803 return 0;
2804 if (prefixlen == 12 && s[i] == '.') {
2805
2806 /* the last 4 bytes may be written as IPv4 address */
2807
2808 tmp = in_aton(s);
2809 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2810 return i + len;
2811 }
2812 ip[prefixlen++] = (u >> 8);
2813 ip[prefixlen++] = (u & 255);
2814 s += i;
2815 len += i;
2816 if (prefixlen == 16)
2817 return len;
2818 }
2819
2820/* part 2, after "::" */
2821 for (;;) {
2822 if (*s == ':') {
2823 if (suffixlen == 0)
2824 break;
2825 s++;
2826 len++;
2827 } else if (suffixlen != 0)
2828 break;
2829
2830 u = simple_strtol(s, &pos, 16);
2831 i = pos - s;
2832 if (!i) {
2833 if (*s)
2834 len--;
2835 break;
2836 }
2837 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2838 tmp = in_aton(s);
2839 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2840 sizeof(tmp));
2841 suffixlen += 4;
2842 len += strlen(s);
2843 break;
2844 }
2845 suffix[suffixlen++] = (u >> 8);
2846 suffix[suffixlen++] = (u & 255);
2847 s += i;
2848 len += i;
2849 if (prefixlen + suffixlen == 16)
2850 break;
2851 }
2852 for (i = 0; i < suffixlen; i++)
2853 ip[16 - suffixlen + i] = suffix[i];
2854 return len;
2855}
2856
2857static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2858 struct pktgen_dev *pkt_dev)
2859{
2860 struct sk_buff *skb = NULL;
2861 __u8 *eth;
2862 struct udphdr *udph;
2863 int datalen;
2864 struct ipv6hdr *iph;
2865 __be16 protocol = htons(ETH_P_IPV6);
2866 __be32 *mpls;
2867 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2868 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2869 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2870 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2871 u16 queue_map;
2872
2873 if (pkt_dev->nr_labels)
2874 protocol = htons(ETH_P_MPLS_UC);
2875
2876 if (pkt_dev->vlan_id != 0xffff)
2877 protocol = htons(ETH_P_8021Q);
2878
2879 /* Update any of the values, used when we're incrementing various
2880 * fields.
2881 */
2882 mod_cur_headers(pkt_dev);
2883 queue_map = pkt_dev->cur_queue_map;
2884
2885 skb = __netdev_alloc_skb(odev,
2886 pkt_dev->cur_pkt_size + 64
2887 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
2888 if (!skb) {
2889 sprintf(pkt_dev->result, "No memory");
2890 return NULL;
2891 }
2892 prefetchw(skb->data);
2893
2894 skb_reserve(skb, 16);
2895
2896 /* Reserve for ethernet and IP header */
2897 eth = (__u8 *) skb_push(skb, 14);
2898 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2899 if (pkt_dev->nr_labels)
2900 mpls_push(mpls, pkt_dev);
2901
2902 if (pkt_dev->vlan_id != 0xffff) {
2903 if (pkt_dev->svlan_id != 0xffff) {
2904 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2905 *svlan_tci = build_tci(pkt_dev->svlan_id,
2906 pkt_dev->svlan_cfi,
2907 pkt_dev->svlan_p);
2908 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2909 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2910 }
2911 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2912 *vlan_tci = build_tci(pkt_dev->vlan_id,
2913 pkt_dev->vlan_cfi,
2914 pkt_dev->vlan_p);
2915 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2916 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2917 }
2918
2919 skb->network_header = skb->tail;
2920 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2921 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2922 skb_set_queue_mapping(skb, queue_map);
2923 skb->priority = pkt_dev->skb_priority;
2924 iph = ipv6_hdr(skb);
2925 udph = udp_hdr(skb);
2926
2927 memcpy(eth, pkt_dev->hh, 12);
2928 *(__be16 *) ð[12] = protocol;
2929
2930 /* Eth + IPh + UDPh + mpls */
2931 datalen = pkt_dev->cur_pkt_size - 14 -
2932 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2933 pkt_dev->pkt_overhead;
2934
2935 if (datalen < sizeof(struct pktgen_hdr)) {
2936 datalen = sizeof(struct pktgen_hdr);
2937 if (net_ratelimit())
2938 pr_info("increased datalen to %d\n", datalen);
2939 }
2940
2941 udph->source = htons(pkt_dev->cur_udp_src);
2942 udph->dest = htons(pkt_dev->cur_udp_dst);
2943 udph->len = htons(datalen + sizeof(struct udphdr));
2944 udph->check = 0; /* No checksum */
2945
2946 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2947
2948 if (pkt_dev->traffic_class) {
2949 /* Version + traffic class + flow (0) */
2950 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2951 }
2952
2953 iph->hop_limit = 32;
2954
2955 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2956 iph->nexthdr = IPPROTO_UDP;
2957
2958 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2959 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2960
2961 skb->mac_header = (skb->network_header - ETH_HLEN -
2962 pkt_dev->pkt_overhead);
2963 skb->protocol = protocol;
2964 skb->dev = odev;
2965 skb->pkt_type = PACKET_HOST;
2966
2967 pktgen_finalize_skb(pkt_dev, skb, datalen);
2968
2969 return skb;
2970}
2971
2972static struct sk_buff *fill_packet(struct net_device *odev,
2973 struct pktgen_dev *pkt_dev)
2974{
2975 if (pkt_dev->flags & F_IPV6)
2976 return fill_packet_ipv6(odev, pkt_dev);
2977 else
2978 return fill_packet_ipv4(odev, pkt_dev);
2979}
2980
2981static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2982{
2983 pkt_dev->seq_num = 1;
2984 pkt_dev->idle_acc = 0;
2985 pkt_dev->sofar = 0;
2986 pkt_dev->tx_bytes = 0;
2987 pkt_dev->errors = 0;
2988}
2989
2990/* Set up structure for sending pkts, clear counters */
2991
2992static void pktgen_run(struct pktgen_thread *t)
2993{
2994 struct pktgen_dev *pkt_dev;
2995 int started = 0;
2996
2997 func_enter();
2998
2999 if_lock(t);
3000 list_for_each_entry(pkt_dev, &t->if_list, list) {
3001
3002 /*
3003 * setup odev and create initial packet.
3004 */
3005 pktgen_setup_inject(pkt_dev);
3006
3007 if (pkt_dev->odev) {
3008 pktgen_clear_counters(pkt_dev);
3009 pkt_dev->running = 1; /* Cranke yeself! */
3010 pkt_dev->skb = NULL;
3011 pkt_dev->started_at =
3012 pkt_dev->next_tx = ktime_now();
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(void)
3027{
3028 struct pktgen_thread *t;
3029
3030 func_enter();
3031
3032 mutex_lock(&pktgen_thread_lock);
3033
3034 list_for_each_entry(t, &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(void)
3071{
3072 struct pktgen_thread *t;
3073 int sig = 1;
3074
3075 mutex_lock(&pktgen_thread_lock);
3076
3077 list_for_each_entry(t, &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, &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(void)
3092{
3093 struct pktgen_thread *t;
3094
3095 func_enter();
3096
3097 mutex_lock(&pktgen_thread_lock);
3098
3099 list_for_each_entry(t, &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();
3108}
3109
3110static void pktgen_reset_all_threads(void)
3111{
3112 struct pktgen_thread *t;
3113
3114 func_enter();
3115
3116 mutex_lock(&pktgen_thread_lock);
3117
3118 list_for_each_entry(t, &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();
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_now();
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_lt(pkt_dev->next_tx, best->next_tx))
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
3269 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3270
3271}
3272
3273static void pktgen_resched(struct pktgen_dev *pkt_dev)
3274{
3275 ktime_t idle_start = ktime_now();
3276 schedule();
3277 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3278}
3279
3280static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3281{
3282 ktime_t idle_start = ktime_now();
3283
3284 while (atomic_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_now(), idle_start));
3294}
3295
3296static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3297{
3298 struct net_device *odev = pkt_dev->odev;
3299 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3300 = odev->netdev_ops->ndo_start_xmit;
3301 struct netdev_queue *txq;
3302 u16 queue_map;
3303 int ret;
3304
3305 /* If device is offline, then don't send */
3306 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3307 pktgen_stop_device(pkt_dev);
3308 return;
3309 }
3310
3311 /* This is max DELAY, this has special meaning of
3312 * "never transmit"
3313 */
3314 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3315 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX);
3316 return;
3317 }
3318
3319 /* If no skb or clone count exhausted then get new one */
3320 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3321 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3322 /* build a new pkt */
3323 kfree_skb(pkt_dev->skb);
3324
3325 pkt_dev->skb = fill_packet(odev, pkt_dev);
3326 if (pkt_dev->skb == NULL) {
3327 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3328 schedule();
3329 pkt_dev->clone_count--; /* back out increment, OOM */
3330 return;
3331 }
3332 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3333 pkt_dev->allocated_skbs++;
3334 pkt_dev->clone_count = 0; /* reset counter */
3335 }
3336
3337 if (pkt_dev->delay && pkt_dev->last_ok)
3338 spin(pkt_dev, pkt_dev->next_tx);
3339
3340 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3341 txq = netdev_get_tx_queue(odev, queue_map);
3342
3343 __netif_tx_lock_bh(txq);
3344
3345 if (unlikely(netif_tx_queue_frozen_or_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 if (net_ratelimit())
3369 pr_info("%s xmit error: %d\n", 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 __netif_tx_unlock_bh(txq);
3380
3381 /* If pkt_dev->count is zero, then run forever */
3382 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3383 pktgen_wait_for_skb(pkt_dev);
3384
3385 /* Done with this */
3386 pktgen_stop_device(pkt_dev);
3387 }
3388}
3389
3390/*
3391 * Main loop of the thread goes here
3392 */
3393
3394static int pktgen_thread_worker(void *arg)
3395{
3396 DEFINE_WAIT(wait);
3397 struct pktgen_thread *t = arg;
3398 struct pktgen_dev *pkt_dev = NULL;
3399 int cpu = t->cpu;
3400
3401 BUG_ON(smp_processor_id() != cpu);
3402
3403 init_waitqueue_head(&t->queue);
3404 complete(&t->start_done);
3405
3406 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3407
3408 set_current_state(TASK_INTERRUPTIBLE);
3409
3410 set_freezable();
3411
3412 while (!kthread_should_stop()) {
3413 pkt_dev = next_to_run(t);
3414
3415 if (unlikely(!pkt_dev && t->control == 0)) {
3416 if (pktgen_exiting)
3417 break;
3418 wait_event_interruptible_timeout(t->queue,
3419 t->control != 0,
3420 HZ/10);
3421 try_to_freeze();
3422 continue;
3423 }
3424
3425 __set_current_state(TASK_RUNNING);
3426
3427 if (likely(pkt_dev)) {
3428 pktgen_xmit(pkt_dev);
3429
3430 if (need_resched())
3431 pktgen_resched(pkt_dev);
3432 else
3433 cpu_relax();
3434 }
3435
3436 if (t->control & T_STOP) {
3437 pktgen_stop(t);
3438 t->control &= ~(T_STOP);
3439 }
3440
3441 if (t->control & T_RUN) {
3442 pktgen_run(t);
3443 t->control &= ~(T_RUN);
3444 }
3445
3446 if (t->control & T_REMDEVALL) {
3447 pktgen_rem_all_ifs(t);
3448 t->control &= ~(T_REMDEVALL);
3449 }
3450
3451 if (t->control & T_REMDEV) {
3452 pktgen_rem_one_if(t);
3453 t->control &= ~(T_REMDEV);
3454 }
3455
3456 try_to_freeze();
3457
3458 set_current_state(TASK_INTERRUPTIBLE);
3459 }
3460
3461 pr_debug("%s stopping all device\n", t->tsk->comm);
3462 pktgen_stop(t);
3463
3464 pr_debug("%s removing all device\n", t->tsk->comm);
3465 pktgen_rem_all_ifs(t);
3466
3467 pr_debug("%s removing thread\n", t->tsk->comm);
3468 pktgen_rem_thread(t);
3469
3470 /* Wait for kthread_stop */
3471 while (!kthread_should_stop()) {
3472 set_current_state(TASK_INTERRUPTIBLE);
3473 schedule();
3474 }
3475 __set_current_state(TASK_RUNNING);
3476
3477 return 0;
3478}
3479
3480static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3481 const char *ifname, bool exact)
3482{
3483 struct pktgen_dev *p, *pkt_dev = NULL;
3484 size_t len = strlen(ifname);
3485
3486 if_lock(t);
3487 list_for_each_entry(p, &t->if_list, list)
3488 if (strncmp(p->odevname, ifname, len) == 0) {
3489 if (p->odevname[len]) {
3490 if (exact || p->odevname[len] != '@')
3491 continue;
3492 }
3493 pkt_dev = p;
3494 break;
3495 }
3496
3497 if_unlock(t);
3498 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3499 return pkt_dev;
3500}
3501
3502/*
3503 * Adds a dev at front of if_list.
3504 */
3505
3506static int add_dev_to_thread(struct pktgen_thread *t,
3507 struct pktgen_dev *pkt_dev)
3508{
3509 int rv = 0;
3510
3511 if_lock(t);
3512
3513 if (pkt_dev->pg_thread) {
3514 pr_err("ERROR: already assigned to a thread\n");
3515 rv = -EBUSY;
3516 goto out;
3517 }
3518
3519 list_add(&pkt_dev->list, &t->if_list);
3520 pkt_dev->pg_thread = t;
3521 pkt_dev->running = 0;
3522
3523out:
3524 if_unlock(t);
3525 return rv;
3526}
3527
3528/* Called under thread lock */
3529
3530static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3531{
3532 struct pktgen_dev *pkt_dev;
3533 int err;
3534 int node = cpu_to_node(t->cpu);
3535
3536 /* We don't allow a device to be on several threads */
3537
3538 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3539 if (pkt_dev) {
3540 pr_err("ERROR: interface already used\n");
3541 return -EBUSY;
3542 }
3543
3544 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3545 if (!pkt_dev)
3546 return -ENOMEM;
3547
3548 strcpy(pkt_dev->odevname, ifname);
3549 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3550 node);
3551 if (pkt_dev->flows == NULL) {
3552 kfree(pkt_dev);
3553 return -ENOMEM;
3554 }
3555
3556 pkt_dev->removal_mark = 0;
3557 pkt_dev->min_pkt_size = ETH_ZLEN;
3558 pkt_dev->max_pkt_size = ETH_ZLEN;
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(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, pg_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#endif
3593
3594 return add_dev_to_thread(t, pkt_dev);
3595out2:
3596 dev_put(pkt_dev->odev);
3597out1:
3598#ifdef CONFIG_XFRM
3599 free_SAs(pkt_dev);
3600#endif
3601 vfree(pkt_dev->flows);
3602 kfree(pkt_dev);
3603 return err;
3604}
3605
3606static int __init pktgen_create_thread(int cpu)
3607{
3608 struct pktgen_thread *t;
3609 struct proc_dir_entry *pe;
3610 struct task_struct *p;
3611
3612 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3613 cpu_to_node(cpu));
3614 if (!t) {
3615 pr_err("ERROR: out of memory, can't create new thread\n");
3616 return -ENOMEM;
3617 }
3618
3619 spin_lock_init(&t->if_lock);
3620 t->cpu = cpu;
3621
3622 INIT_LIST_HEAD(&t->if_list);
3623
3624 list_add_tail(&t->th_list, &pktgen_threads);
3625 init_completion(&t->start_done);
3626
3627 p = kthread_create_on_node(pktgen_thread_worker,
3628 t,
3629 cpu_to_node(cpu),
3630 "kpktgend_%d", cpu);
3631 if (IS_ERR(p)) {
3632 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3633 list_del(&t->th_list);
3634 kfree(t);
3635 return PTR_ERR(p);
3636 }
3637 kthread_bind(p, cpu);
3638 t->tsk = p;
3639
3640 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3641 &pktgen_thread_fops, t);
3642 if (!pe) {
3643 pr_err("cannot create %s/%s procfs entry\n",
3644 PG_PROC_DIR, t->tsk->comm);
3645 kthread_stop(p);
3646 list_del(&t->th_list);
3647 kfree(t);
3648 return -EINVAL;
3649 }
3650
3651 wake_up_process(p);
3652 wait_for_completion(&t->start_done);
3653
3654 return 0;
3655}
3656
3657/*
3658 * Removes a device from the thread if_list.
3659 */
3660static void _rem_dev_from_if_list(struct pktgen_thread *t,
3661 struct pktgen_dev *pkt_dev)
3662{
3663 struct list_head *q, *n;
3664 struct pktgen_dev *p;
3665
3666 list_for_each_safe(q, n, &t->if_list) {
3667 p = list_entry(q, struct pktgen_dev, list);
3668 if (p == pkt_dev)
3669 list_del(&p->list);
3670 }
3671}
3672
3673static int pktgen_remove_device(struct pktgen_thread *t,
3674 struct pktgen_dev *pkt_dev)
3675{
3676
3677 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3678
3679 if (pkt_dev->running) {
3680 pr_warning("WARNING: trying to remove a running interface, stopping it now\n");
3681 pktgen_stop_device(pkt_dev);
3682 }
3683
3684 /* Dis-associate from the interface */
3685
3686 if (pkt_dev->odev) {
3687 dev_put(pkt_dev->odev);
3688 pkt_dev->odev = NULL;
3689 }
3690
3691 /* And update the thread if_list */
3692
3693 _rem_dev_from_if_list(t, pkt_dev);
3694
3695 if (pkt_dev->entry)
3696 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3697
3698#ifdef CONFIG_XFRM
3699 free_SAs(pkt_dev);
3700#endif
3701 vfree(pkt_dev->flows);
3702 if (pkt_dev->page)
3703 put_page(pkt_dev->page);
3704 kfree(pkt_dev);
3705 return 0;
3706}
3707
3708static int __init pg_init(void)
3709{
3710 int cpu;
3711 struct proc_dir_entry *pe;
3712 int ret = 0;
3713
3714 pr_info("%s", version);
3715
3716 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3717 if (!pg_proc_dir)
3718 return -ENODEV;
3719
3720 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3721 if (pe == NULL) {
3722 pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL);
3723 ret = -EINVAL;
3724 goto remove_dir;
3725 }
3726
3727 register_netdevice_notifier(&pktgen_notifier_block);
3728
3729 for_each_online_cpu(cpu) {
3730 int err;
3731
3732 err = pktgen_create_thread(cpu);
3733 if (err)
3734 pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n",
3735 cpu, err);
3736 }
3737
3738 if (list_empty(&pktgen_threads)) {
3739 pr_err("ERROR: Initialization failed for all threads\n");
3740 ret = -ENODEV;
3741 goto unregister;
3742 }
3743
3744 return 0;
3745
3746 unregister:
3747 unregister_netdevice_notifier(&pktgen_notifier_block);
3748 remove_proc_entry(PGCTRL, pg_proc_dir);
3749 remove_dir:
3750 proc_net_remove(&init_net, PG_PROC_DIR);
3751 return ret;
3752}
3753
3754static void __exit pg_cleanup(void)
3755{
3756 struct pktgen_thread *t;
3757 struct list_head *q, *n;
3758
3759 /* Stop all interfaces & threads */
3760 pktgen_exiting = true;
3761
3762 list_for_each_safe(q, n, &pktgen_threads) {
3763 t = list_entry(q, struct pktgen_thread, th_list);
3764 kthread_stop(t->tsk);
3765 kfree(t);
3766 }
3767
3768 /* Un-register us from receiving netdevice events */
3769 unregister_netdevice_notifier(&pktgen_notifier_block);
3770
3771 /* Clean up proc file system */
3772 remove_proc_entry(PGCTRL, pg_proc_dir);
3773 proc_net_remove(&init_net, PG_PROC_DIR);
3774}
3775
3776module_init(pg_init);
3777module_exit(pg_cleanup);
3778
3779MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3780MODULE_DESCRIPTION("Packet Generator tool");
3781MODULE_LICENSE("GPL");
3782MODULE_VERSION(VERSION);
3783module_param(pg_count_d, int, 0);
3784MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3785module_param(pg_delay_d, int, 0);
3786MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3787module_param(pg_clone_skb_d, int, 0);
3788MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3789module_param(debug, int, 0);
3790MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
1/*
2 * Authors:
3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
4 * Uppsala University and
5 * Swedish University of Agricultural Sciences
6 *
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 * Ben Greear <greearb@candelatech.com>
9 * Jens Låås <jens.laas@data.slu.se>
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 *
16 *
17 * A tool for loading the network with preconfigurated packets.
18 * The tool is implemented as a linux module. Parameters are output
19 * device, delay (to hard_xmit), number of packets, and whether
20 * to use multiple SKBs or just the same one.
21 * pktgen uses the installed interface's output routine.
22 *
23 * Additional hacking by:
24 *
25 * Jens.Laas@data.slu.se
26 * Improved by ANK. 010120.
27 * Improved by ANK even more. 010212.
28 * MAC address typo fixed. 010417 --ro
29 * Integrated. 020301 --DaveM
30 * Added multiskb option 020301 --DaveM
31 * Scaling of results. 020417--sigurdur@linpro.no
32 * Significant re-work of the module:
33 * * Convert to threaded model to more efficiently be able to transmit
34 * and receive on multiple interfaces at once.
35 * * Converted many counters to __u64 to allow longer runs.
36 * * Allow configuration of ranges, like min/max IP address, MACs,
37 * and UDP-ports, for both source and destination, and can
38 * set to use a random distribution or sequentially walk the range.
39 * * Can now change most values after starting.
40 * * Place 12-byte packet in UDP payload with magic number,
41 * sequence number, and timestamp.
42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and
43 * latencies (with micro-second) precision.
44 * * Add IOCTL interface to easily get counters & configuration.
45 * --Ben Greear <greearb@candelatech.com>
46 *
47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
49 * as a "fastpath" with a configurable number of clones after alloc's.
50 * clone_skb=0 means all packets are allocated this also means ranges time
51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
52 * clones.
53 *
54 * Also moved to /proc/net/pktgen/
55 * --ro
56 *
57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
58 * mistakes. Also merged in DaveM's patch in the -pre6 patch.
59 * --Ben Greear <greearb@candelatech.com>
60 *
61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
62 *
63 *
64 * 021124 Finished major redesign and rewrite for new functionality.
65 * See Documentation/networking/pktgen.txt for how to use this.
66 *
67 * The new operation:
68 * For each CPU one thread/process is created at start. This process checks
69 * for running devices in the if_list and sends packets until count is 0 it
70 * also the thread checks the thread->control which is used for inter-process
71 * communication. controlling process "posts" operations to the threads this
72 * way.
73 * The if_list is RCU protected, and the if_lock remains to protect updating
74 * of if_list, from "add_device" as it invoked from userspace (via proc write).
75 *
76 * By design there should only be *one* "controlling" process. In practice
77 * multiple write accesses gives unpredictable result. Understood by "write"
78 * to /proc gives result code thats should be read be the "writer".
79 * For practical use this should be no problem.
80 *
81 * Note when adding devices to a specific CPU there good idea to also assign
82 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
83 * --ro
84 *
85 * Fix refcount off by one if first packet fails, potential null deref,
86 * memleak 030710- KJP
87 *
88 * First "ranges" functionality for ipv6 030726 --ro
89 *
90 * Included flow support. 030802 ANK.
91 *
92 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
93 *
94 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
95 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
96 *
97 * New xmit() return, do_div and misc clean up by Stephen Hemminger
98 * <shemminger@osdl.org> 040923
99 *
100 * Randy Dunlap fixed u64 printk compiler warning
101 *
102 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
103 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
104 *
105 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
106 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
107 *
108 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
109 * 050103
110 *
111 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
112 *
113 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
114 *
115 * Fixed src_mac command to set source mac of packet to value specified in
116 * command by Adit Ranadive <adit.262@gmail.com>
117 *
118 */
119
120#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
121
122#include <linux/sys.h>
123#include <linux/types.h>
124#include <linux/module.h>
125#include <linux/moduleparam.h>
126#include <linux/kernel.h>
127#include <linux/mutex.h>
128#include <linux/sched.h>
129#include <linux/slab.h>
130#include <linux/vmalloc.h>
131#include <linux/unistd.h>
132#include <linux/string.h>
133#include <linux/ptrace.h>
134#include <linux/errno.h>
135#include <linux/ioport.h>
136#include <linux/interrupt.h>
137#include <linux/capability.h>
138#include <linux/hrtimer.h>
139#include <linux/freezer.h>
140#include <linux/delay.h>
141#include <linux/timer.h>
142#include <linux/list.h>
143#include <linux/init.h>
144#include <linux/skbuff.h>
145#include <linux/netdevice.h>
146#include <linux/inet.h>
147#include <linux/inetdevice.h>
148#include <linux/rtnetlink.h>
149#include <linux/if_arp.h>
150#include <linux/if_vlan.h>
151#include <linux/in.h>
152#include <linux/ip.h>
153#include <linux/ipv6.h>
154#include <linux/udp.h>
155#include <linux/proc_fs.h>
156#include <linux/seq_file.h>
157#include <linux/wait.h>
158#include <linux/etherdevice.h>
159#include <linux/kthread.h>
160#include <linux/prefetch.h>
161#include <net/net_namespace.h>
162#include <net/checksum.h>
163#include <net/ipv6.h>
164#include <net/udp.h>
165#include <net/ip6_checksum.h>
166#include <net/addrconf.h>
167#ifdef CONFIG_XFRM
168#include <net/xfrm.h>
169#endif
170#include <net/netns/generic.h>
171#include <asm/byteorder.h>
172#include <linux/rcupdate.h>
173#include <linux/bitops.h>
174#include <linux/io.h>
175#include <linux/timex.h>
176#include <linux/uaccess.h>
177#include <asm/dma.h>
178#include <asm/div64.h> /* do_div */
179
180#define VERSION "2.75"
181#define IP_NAME_SZ 32
182#define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
183#define MPLS_STACK_BOTTOM htonl(0x00000100)
184
185#define func_enter() pr_debug("entering %s\n", __func__);
186
187/* Device flag bits */
188#define F_IPSRC_RND (1<<0) /* IP-Src Random */
189#define F_IPDST_RND (1<<1) /* IP-Dst Random */
190#define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
191#define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
192#define F_MACSRC_RND (1<<4) /* MAC-Src Random */
193#define F_MACDST_RND (1<<5) /* MAC-Dst Random */
194#define F_TXSIZE_RND (1<<6) /* Transmit size is random */
195#define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
196#define F_MPLS_RND (1<<8) /* Random MPLS labels */
197#define F_VID_RND (1<<9) /* Random VLAN ID */
198#define F_SVID_RND (1<<10) /* Random SVLAN ID */
199#define F_FLOW_SEQ (1<<11) /* Sequential flows */
200#define F_IPSEC_ON (1<<12) /* ipsec on for flows */
201#define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
202#define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
203#define F_NODE (1<<15) /* Node memory alloc*/
204#define F_UDPCSUM (1<<16) /* Include UDP checksum */
205#define F_NO_TIMESTAMP (1<<17) /* Don't timestamp packets (default TS) */
206
207/* Thread control flag bits */
208#define T_STOP (1<<0) /* Stop run */
209#define T_RUN (1<<1) /* Start run */
210#define T_REMDEVALL (1<<2) /* Remove all devs */
211#define T_REMDEV (1<<3) /* Remove one dev */
212
213/* Xmit modes */
214#define M_START_XMIT 0 /* Default normal TX */
215#define M_NETIF_RECEIVE 1 /* Inject packets into stack */
216
217/* If lock -- protects updating of if_list */
218#define if_lock(t) spin_lock(&(t->if_lock));
219#define if_unlock(t) spin_unlock(&(t->if_lock));
220
221/* Used to help with determining the pkts on receive */
222#define PKTGEN_MAGIC 0xbe9be955
223#define PG_PROC_DIR "pktgen"
224#define PGCTRL "pgctrl"
225
226#define MAX_CFLOWS 65536
227
228#define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
229#define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
230
231struct flow_state {
232 __be32 cur_daddr;
233 int count;
234#ifdef CONFIG_XFRM
235 struct xfrm_state *x;
236#endif
237 __u32 flags;
238};
239
240/* flow flag bits */
241#define F_INIT (1<<0) /* flow has been initialized */
242
243struct pktgen_dev {
244 /*
245 * Try to keep frequent/infrequent used vars. separated.
246 */
247 struct proc_dir_entry *entry; /* proc file */
248 struct pktgen_thread *pg_thread;/* the owner */
249 struct list_head list; /* chaining in the thread's run-queue */
250 struct rcu_head rcu; /* freed by RCU */
251
252 int running; /* if false, the test will stop */
253
254 /* If min != max, then we will either do a linear iteration, or
255 * we will do a random selection from within the range.
256 */
257 __u32 flags;
258 int xmit_mode;
259 int min_pkt_size;
260 int max_pkt_size;
261 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
262 int nfrags;
263 int removal_mark; /* non-zero => the device is marked for
264 * removal by worker thread */
265
266 struct page *page;
267 u64 delay; /* nano-seconds */
268
269 __u64 count; /* Default No packets to send */
270 __u64 sofar; /* How many pkts we've sent so far */
271 __u64 tx_bytes; /* How many bytes we've transmitted */
272 __u64 errors; /* Errors when trying to transmit, */
273
274 /* runtime counters relating to clone_skb */
275
276 __u32 clone_count;
277 int last_ok; /* Was last skb sent?
278 * Or a failed transmit of some sort?
279 * This will keep sequence numbers in order
280 */
281 ktime_t next_tx;
282 ktime_t started_at;
283 ktime_t stopped_at;
284 u64 idle_acc; /* nano-seconds */
285
286 __u32 seq_num;
287
288 int clone_skb; /*
289 * Use multiple SKBs during packet gen.
290 * If this number is greater than 1, then
291 * that many copies of the same packet will be
292 * sent before a new packet is allocated.
293 * If you want to send 1024 identical packets
294 * before creating a new packet,
295 * set clone_skb to 1024.
296 */
297
298 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
299 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
300 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
301 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
302
303 struct in6_addr in6_saddr;
304 struct in6_addr in6_daddr;
305 struct in6_addr cur_in6_daddr;
306 struct in6_addr cur_in6_saddr;
307 /* For ranges */
308 struct in6_addr min_in6_daddr;
309 struct in6_addr max_in6_daddr;
310 struct in6_addr min_in6_saddr;
311 struct in6_addr max_in6_saddr;
312
313 /* If we're doing ranges, random or incremental, then this
314 * defines the min/max for those ranges.
315 */
316 __be32 saddr_min; /* inclusive, source IP address */
317 __be32 saddr_max; /* exclusive, source IP address */
318 __be32 daddr_min; /* inclusive, dest IP address */
319 __be32 daddr_max; /* exclusive, dest IP address */
320
321 __u16 udp_src_min; /* inclusive, source UDP port */
322 __u16 udp_src_max; /* exclusive, source UDP port */
323 __u16 udp_dst_min; /* inclusive, dest UDP port */
324 __u16 udp_dst_max; /* exclusive, dest UDP port */
325
326 /* DSCP + ECN */
327 __u8 tos; /* six MSB of (former) IPv4 TOS
328 are for dscp codepoint */
329 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
330 (see RFC 3260, sec. 4) */
331
332 /* MPLS */
333 unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */
334 __be32 labels[MAX_MPLS_LABELS];
335
336 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
337 __u8 vlan_p;
338 __u8 vlan_cfi;
339 __u16 vlan_id; /* 0xffff means no vlan tag */
340
341 __u8 svlan_p;
342 __u8 svlan_cfi;
343 __u16 svlan_id; /* 0xffff means no svlan tag */
344
345 __u32 src_mac_count; /* How many MACs to iterate through */
346 __u32 dst_mac_count; /* How many MACs to iterate through */
347
348 unsigned char dst_mac[ETH_ALEN];
349 unsigned char src_mac[ETH_ALEN];
350
351 __u32 cur_dst_mac_offset;
352 __u32 cur_src_mac_offset;
353 __be32 cur_saddr;
354 __be32 cur_daddr;
355 __u16 ip_id;
356 __u16 cur_udp_dst;
357 __u16 cur_udp_src;
358 __u16 cur_queue_map;
359 __u32 cur_pkt_size;
360 __u32 last_pkt_size;
361
362 __u8 hh[14];
363 /* = {
364 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
365
366 We fill in SRC address later
367 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
368 0x08, 0x00
369 };
370 */
371 __u16 pad; /* pad out the hh struct to an even 16 bytes */
372
373 struct sk_buff *skb; /* skb we are to transmit next, used for when we
374 * are transmitting the same one multiple times
375 */
376 struct net_device *odev; /* The out-going device.
377 * Note that the device should have it's
378 * pg_info pointer pointing back to this
379 * device.
380 * Set when the user specifies the out-going
381 * device name (not when the inject is
382 * started as it used to do.)
383 */
384 char odevname[32];
385 struct flow_state *flows;
386 unsigned int cflows; /* Concurrent flows (config) */
387 unsigned int lflow; /* Flow length (config) */
388 unsigned int nflows; /* accumulated flows (stats) */
389 unsigned int curfl; /* current sequenced flow (state)*/
390
391 u16 queue_map_min;
392 u16 queue_map_max;
393 __u32 skb_priority; /* skb priority field */
394 unsigned int burst; /* number of duplicated packets to burst */
395 int node; /* Memory node */
396
397#ifdef CONFIG_XFRM
398 __u8 ipsmode; /* IPSEC mode (config) */
399 __u8 ipsproto; /* IPSEC type (config) */
400 __u32 spi;
401 struct dst_entry dst;
402 struct dst_ops dstops;
403#endif
404 char result[512];
405};
406
407struct pktgen_hdr {
408 __be32 pgh_magic;
409 __be32 seq_num;
410 __be32 tv_sec;
411 __be32 tv_usec;
412};
413
414
415static int pg_net_id __read_mostly;
416
417struct pktgen_net {
418 struct net *net;
419 struct proc_dir_entry *proc_dir;
420 struct list_head pktgen_threads;
421 bool pktgen_exiting;
422};
423
424struct pktgen_thread {
425 spinlock_t if_lock; /* for list of devices */
426 struct list_head if_list; /* All device here */
427 struct list_head th_list;
428 struct task_struct *tsk;
429 char result[512];
430
431 /* Field for thread to receive "posted" events terminate,
432 stop ifs etc. */
433
434 u32 control;
435 int cpu;
436
437 wait_queue_head_t queue;
438 struct completion start_done;
439 struct pktgen_net *net;
440};
441
442#define REMOVE 1
443#define FIND 0
444
445static const char version[] =
446 "Packet Generator for packet performance testing. "
447 "Version: " VERSION "\n";
448
449static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
450static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
451static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
452 const char *ifname, bool exact);
453static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
454static void pktgen_run_all_threads(struct pktgen_net *pn);
455static void pktgen_reset_all_threads(struct pktgen_net *pn);
456static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn);
457
458static void pktgen_stop(struct pktgen_thread *t);
459static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
460
461/* Module parameters, defaults. */
462static int pg_count_d __read_mostly = 1000;
463static int pg_delay_d __read_mostly;
464static int pg_clone_skb_d __read_mostly;
465static int debug __read_mostly;
466
467static DEFINE_MUTEX(pktgen_thread_lock);
468
469static struct notifier_block pktgen_notifier_block = {
470 .notifier_call = pktgen_device_event,
471};
472
473/*
474 * /proc handling functions
475 *
476 */
477
478static int pgctrl_show(struct seq_file *seq, void *v)
479{
480 seq_puts(seq, version);
481 return 0;
482}
483
484static ssize_t pgctrl_write(struct file *file, const char __user *buf,
485 size_t count, loff_t *ppos)
486{
487 char data[128];
488 struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
489
490 if (!capable(CAP_NET_ADMIN))
491 return -EPERM;
492
493 if (count == 0)
494 return -EINVAL;
495
496 if (count > sizeof(data))
497 count = sizeof(data);
498
499 if (copy_from_user(data, buf, count))
500 return -EFAULT;
501
502 data[count - 1] = 0; /* Strip trailing '\n' and terminate string */
503
504 if (!strcmp(data, "stop"))
505 pktgen_stop_all_threads_ifs(pn);
506
507 else if (!strcmp(data, "start"))
508 pktgen_run_all_threads(pn);
509
510 else if (!strcmp(data, "reset"))
511 pktgen_reset_all_threads(pn);
512
513 else
514 return -EINVAL;
515
516 return count;
517}
518
519static int pgctrl_open(struct inode *inode, struct file *file)
520{
521 return single_open(file, pgctrl_show, PDE_DATA(inode));
522}
523
524static const struct file_operations pktgen_fops = {
525 .owner = THIS_MODULE,
526 .open = pgctrl_open,
527 .read = seq_read,
528 .llseek = seq_lseek,
529 .write = pgctrl_write,
530 .release = single_release,
531};
532
533static int pktgen_if_show(struct seq_file *seq, void *v)
534{
535 const struct pktgen_dev *pkt_dev = seq->private;
536 ktime_t stopped;
537 u64 idle;
538
539 seq_printf(seq,
540 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
541 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
542 pkt_dev->max_pkt_size);
543
544 seq_printf(seq,
545 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
546 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
547 pkt_dev->clone_skb, pkt_dev->odevname);
548
549 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
550 pkt_dev->lflow);
551
552 seq_printf(seq,
553 " queue_map_min: %u queue_map_max: %u\n",
554 pkt_dev->queue_map_min,
555 pkt_dev->queue_map_max);
556
557 if (pkt_dev->skb_priority)
558 seq_printf(seq, " skb_priority: %u\n",
559 pkt_dev->skb_priority);
560
561 if (pkt_dev->flags & F_IPV6) {
562 seq_printf(seq,
563 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
564 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
565 &pkt_dev->in6_saddr,
566 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
567 &pkt_dev->in6_daddr,
568 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
569 } else {
570 seq_printf(seq,
571 " dst_min: %s dst_max: %s\n",
572 pkt_dev->dst_min, pkt_dev->dst_max);
573 seq_printf(seq,
574 " src_min: %s src_max: %s\n",
575 pkt_dev->src_min, pkt_dev->src_max);
576 }
577
578 seq_puts(seq, " src_mac: ");
579
580 seq_printf(seq, "%pM ",
581 is_zero_ether_addr(pkt_dev->src_mac) ?
582 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
583
584 seq_puts(seq, "dst_mac: ");
585 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
586
587 seq_printf(seq,
588 " udp_src_min: %d udp_src_max: %d"
589 " udp_dst_min: %d udp_dst_max: %d\n",
590 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
591 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
592
593 seq_printf(seq,
594 " src_mac_count: %d dst_mac_count: %d\n",
595 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
596
597 if (pkt_dev->nr_labels) {
598 unsigned int i;
599 seq_puts(seq, " mpls: ");
600 for (i = 0; i < pkt_dev->nr_labels; i++)
601 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
602 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
603 }
604
605 if (pkt_dev->vlan_id != 0xffff)
606 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
607 pkt_dev->vlan_id, pkt_dev->vlan_p,
608 pkt_dev->vlan_cfi);
609
610 if (pkt_dev->svlan_id != 0xffff)
611 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
612 pkt_dev->svlan_id, pkt_dev->svlan_p,
613 pkt_dev->svlan_cfi);
614
615 if (pkt_dev->tos)
616 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
617
618 if (pkt_dev->traffic_class)
619 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
620
621 if (pkt_dev->burst > 1)
622 seq_printf(seq, " burst: %d\n", pkt_dev->burst);
623
624 if (pkt_dev->node >= 0)
625 seq_printf(seq, " node: %d\n", pkt_dev->node);
626
627 if (pkt_dev->xmit_mode == M_NETIF_RECEIVE)
628 seq_puts(seq, " xmit_mode: netif_receive\n");
629
630 seq_puts(seq, " Flags: ");
631
632 if (pkt_dev->flags & F_IPV6)
633 seq_puts(seq, "IPV6 ");
634
635 if (pkt_dev->flags & F_IPSRC_RND)
636 seq_puts(seq, "IPSRC_RND ");
637
638 if (pkt_dev->flags & F_IPDST_RND)
639 seq_puts(seq, "IPDST_RND ");
640
641 if (pkt_dev->flags & F_TXSIZE_RND)
642 seq_puts(seq, "TXSIZE_RND ");
643
644 if (pkt_dev->flags & F_UDPSRC_RND)
645 seq_puts(seq, "UDPSRC_RND ");
646
647 if (pkt_dev->flags & F_UDPDST_RND)
648 seq_puts(seq, "UDPDST_RND ");
649
650 if (pkt_dev->flags & F_UDPCSUM)
651 seq_puts(seq, "UDPCSUM ");
652
653 if (pkt_dev->flags & F_NO_TIMESTAMP)
654 seq_puts(seq, "NO_TIMESTAMP ");
655
656 if (pkt_dev->flags & F_MPLS_RND)
657 seq_puts(seq, "MPLS_RND ");
658
659 if (pkt_dev->flags & F_QUEUE_MAP_RND)
660 seq_puts(seq, "QUEUE_MAP_RND ");
661
662 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
663 seq_puts(seq, "QUEUE_MAP_CPU ");
664
665 if (pkt_dev->cflows) {
666 if (pkt_dev->flags & F_FLOW_SEQ)
667 seq_puts(seq, "FLOW_SEQ "); /*in sequence flows*/
668 else
669 seq_puts(seq, "FLOW_RND ");
670 }
671
672#ifdef CONFIG_XFRM
673 if (pkt_dev->flags & F_IPSEC_ON) {
674 seq_puts(seq, "IPSEC ");
675 if (pkt_dev->spi)
676 seq_printf(seq, "spi:%u", pkt_dev->spi);
677 }
678#endif
679
680 if (pkt_dev->flags & F_MACSRC_RND)
681 seq_puts(seq, "MACSRC_RND ");
682
683 if (pkt_dev->flags & F_MACDST_RND)
684 seq_puts(seq, "MACDST_RND ");
685
686 if (pkt_dev->flags & F_VID_RND)
687 seq_puts(seq, "VID_RND ");
688
689 if (pkt_dev->flags & F_SVID_RND)
690 seq_puts(seq, "SVID_RND ");
691
692 if (pkt_dev->flags & F_NODE)
693 seq_puts(seq, "NODE_ALLOC ");
694
695 seq_puts(seq, "\n");
696
697 /* not really stopped, more like last-running-at */
698 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at;
699 idle = pkt_dev->idle_acc;
700 do_div(idle, NSEC_PER_USEC);
701
702 seq_printf(seq,
703 "Current:\n pkts-sofar: %llu errors: %llu\n",
704 (unsigned long long)pkt_dev->sofar,
705 (unsigned long long)pkt_dev->errors);
706
707 seq_printf(seq,
708 " started: %lluus stopped: %lluus idle: %lluus\n",
709 (unsigned long long) ktime_to_us(pkt_dev->started_at),
710 (unsigned long long) ktime_to_us(stopped),
711 (unsigned long long) idle);
712
713 seq_printf(seq,
714 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
715 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
716 pkt_dev->cur_src_mac_offset);
717
718 if (pkt_dev->flags & F_IPV6) {
719 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
720 &pkt_dev->cur_in6_saddr,
721 &pkt_dev->cur_in6_daddr);
722 } else
723 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n",
724 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
725
726 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
727 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
728
729 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
730
731 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
732
733 if (pkt_dev->result[0])
734 seq_printf(seq, "Result: %s\n", pkt_dev->result);
735 else
736 seq_puts(seq, "Result: Idle\n");
737
738 return 0;
739}
740
741
742static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
743 __u32 *num)
744{
745 int i = 0;
746 *num = 0;
747
748 for (; i < maxlen; i++) {
749 int value;
750 char c;
751 *num <<= 4;
752 if (get_user(c, &user_buffer[i]))
753 return -EFAULT;
754 value = hex_to_bin(c);
755 if (value >= 0)
756 *num |= value;
757 else
758 break;
759 }
760 return i;
761}
762
763static int count_trail_chars(const char __user * user_buffer,
764 unsigned int maxlen)
765{
766 int i;
767
768 for (i = 0; i < maxlen; i++) {
769 char c;
770 if (get_user(c, &user_buffer[i]))
771 return -EFAULT;
772 switch (c) {
773 case '\"':
774 case '\n':
775 case '\r':
776 case '\t':
777 case ' ':
778 case '=':
779 break;
780 default:
781 goto done;
782 }
783 }
784done:
785 return i;
786}
787
788static long num_arg(const char __user *user_buffer, unsigned long maxlen,
789 unsigned long *num)
790{
791 int i;
792 *num = 0;
793
794 for (i = 0; i < maxlen; i++) {
795 char c;
796 if (get_user(c, &user_buffer[i]))
797 return -EFAULT;
798 if ((c >= '0') && (c <= '9')) {
799 *num *= 10;
800 *num += c - '0';
801 } else
802 break;
803 }
804 return i;
805}
806
807static int strn_len(const char __user * user_buffer, unsigned int maxlen)
808{
809 int i;
810
811 for (i = 0; i < maxlen; i++) {
812 char c;
813 if (get_user(c, &user_buffer[i]))
814 return -EFAULT;
815 switch (c) {
816 case '\"':
817 case '\n':
818 case '\r':
819 case '\t':
820 case ' ':
821 goto done_str;
822 default:
823 break;
824 }
825 }
826done_str:
827 return i;
828}
829
830static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
831{
832 unsigned int n = 0;
833 char c;
834 ssize_t i = 0;
835 int len;
836
837 pkt_dev->nr_labels = 0;
838 do {
839 __u32 tmp;
840 len = hex32_arg(&buffer[i], 8, &tmp);
841 if (len <= 0)
842 return len;
843 pkt_dev->labels[n] = htonl(tmp);
844 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
845 pkt_dev->flags |= F_MPLS_RND;
846 i += len;
847 if (get_user(c, &buffer[i]))
848 return -EFAULT;
849 i++;
850 n++;
851 if (n >= MAX_MPLS_LABELS)
852 return -E2BIG;
853 } while (c == ',');
854
855 pkt_dev->nr_labels = n;
856 return i;
857}
858
859static ssize_t pktgen_if_write(struct file *file,
860 const char __user * user_buffer, size_t count,
861 loff_t * offset)
862{
863 struct seq_file *seq = file->private_data;
864 struct pktgen_dev *pkt_dev = seq->private;
865 int i, max, len;
866 char name[16], valstr[32];
867 unsigned long value = 0;
868 char *pg_result = NULL;
869 int tmp = 0;
870 char buf[128];
871
872 pg_result = &(pkt_dev->result[0]);
873
874 if (count < 1) {
875 pr_warn("wrong command format\n");
876 return -EINVAL;
877 }
878
879 max = count;
880 tmp = count_trail_chars(user_buffer, max);
881 if (tmp < 0) {
882 pr_warn("illegal format\n");
883 return tmp;
884 }
885 i = tmp;
886
887 /* Read variable name */
888
889 len = strn_len(&user_buffer[i], sizeof(name) - 1);
890 if (len < 0)
891 return len;
892
893 memset(name, 0, sizeof(name));
894 if (copy_from_user(name, &user_buffer[i], len))
895 return -EFAULT;
896 i += len;
897
898 max = count - i;
899 len = count_trail_chars(&user_buffer[i], max);
900 if (len < 0)
901 return len;
902
903 i += len;
904
905 if (debug) {
906 size_t copy = min_t(size_t, count, 1023);
907 char tb[copy + 1];
908 if (copy_from_user(tb, user_buffer, copy))
909 return -EFAULT;
910 tb[copy] = 0;
911 pr_debug("%s,%lu buffer -:%s:-\n",
912 name, (unsigned long)count, tb);
913 }
914
915 if (!strcmp(name, "min_pkt_size")) {
916 len = num_arg(&user_buffer[i], 10, &value);
917 if (len < 0)
918 return len;
919
920 i += len;
921 if (value < 14 + 20 + 8)
922 value = 14 + 20 + 8;
923 if (value != pkt_dev->min_pkt_size) {
924 pkt_dev->min_pkt_size = value;
925 pkt_dev->cur_pkt_size = value;
926 }
927 sprintf(pg_result, "OK: min_pkt_size=%u",
928 pkt_dev->min_pkt_size);
929 return count;
930 }
931
932 if (!strcmp(name, "max_pkt_size")) {
933 len = num_arg(&user_buffer[i], 10, &value);
934 if (len < 0)
935 return len;
936
937 i += len;
938 if (value < 14 + 20 + 8)
939 value = 14 + 20 + 8;
940 if (value != pkt_dev->max_pkt_size) {
941 pkt_dev->max_pkt_size = value;
942 pkt_dev->cur_pkt_size = value;
943 }
944 sprintf(pg_result, "OK: max_pkt_size=%u",
945 pkt_dev->max_pkt_size);
946 return count;
947 }
948
949 /* Shortcut for min = max */
950
951 if (!strcmp(name, "pkt_size")) {
952 len = num_arg(&user_buffer[i], 10, &value);
953 if (len < 0)
954 return len;
955
956 i += len;
957 if (value < 14 + 20 + 8)
958 value = 14 + 20 + 8;
959 if (value != pkt_dev->min_pkt_size) {
960 pkt_dev->min_pkt_size = value;
961 pkt_dev->max_pkt_size = value;
962 pkt_dev->cur_pkt_size = value;
963 }
964 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
965 return count;
966 }
967
968 if (!strcmp(name, "debug")) {
969 len = num_arg(&user_buffer[i], 10, &value);
970 if (len < 0)
971 return len;
972
973 i += len;
974 debug = value;
975 sprintf(pg_result, "OK: debug=%u", debug);
976 return count;
977 }
978
979 if (!strcmp(name, "frags")) {
980 len = num_arg(&user_buffer[i], 10, &value);
981 if (len < 0)
982 return len;
983
984 i += len;
985 pkt_dev->nfrags = value;
986 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
987 return count;
988 }
989 if (!strcmp(name, "delay")) {
990 len = num_arg(&user_buffer[i], 10, &value);
991 if (len < 0)
992 return len;
993
994 i += len;
995 if (value == 0x7FFFFFFF)
996 pkt_dev->delay = ULLONG_MAX;
997 else
998 pkt_dev->delay = (u64)value;
999
1000 sprintf(pg_result, "OK: delay=%llu",
1001 (unsigned long long) pkt_dev->delay);
1002 return count;
1003 }
1004 if (!strcmp(name, "rate")) {
1005 len = num_arg(&user_buffer[i], 10, &value);
1006 if (len < 0)
1007 return len;
1008
1009 i += len;
1010 if (!value)
1011 return len;
1012 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
1013 if (debug)
1014 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1015
1016 sprintf(pg_result, "OK: rate=%lu", value);
1017 return count;
1018 }
1019 if (!strcmp(name, "ratep")) {
1020 len = num_arg(&user_buffer[i], 10, &value);
1021 if (len < 0)
1022 return len;
1023
1024 i += len;
1025 if (!value)
1026 return len;
1027 pkt_dev->delay = NSEC_PER_SEC/value;
1028 if (debug)
1029 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1030
1031 sprintf(pg_result, "OK: rate=%lu", value);
1032 return count;
1033 }
1034 if (!strcmp(name, "udp_src_min")) {
1035 len = num_arg(&user_buffer[i], 10, &value);
1036 if (len < 0)
1037 return len;
1038
1039 i += len;
1040 if (value != pkt_dev->udp_src_min) {
1041 pkt_dev->udp_src_min = value;
1042 pkt_dev->cur_udp_src = value;
1043 }
1044 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1045 return count;
1046 }
1047 if (!strcmp(name, "udp_dst_min")) {
1048 len = num_arg(&user_buffer[i], 10, &value);
1049 if (len < 0)
1050 return len;
1051
1052 i += len;
1053 if (value != pkt_dev->udp_dst_min) {
1054 pkt_dev->udp_dst_min = value;
1055 pkt_dev->cur_udp_dst = value;
1056 }
1057 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1058 return count;
1059 }
1060 if (!strcmp(name, "udp_src_max")) {
1061 len = num_arg(&user_buffer[i], 10, &value);
1062 if (len < 0)
1063 return len;
1064
1065 i += len;
1066 if (value != pkt_dev->udp_src_max) {
1067 pkt_dev->udp_src_max = value;
1068 pkt_dev->cur_udp_src = value;
1069 }
1070 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1071 return count;
1072 }
1073 if (!strcmp(name, "udp_dst_max")) {
1074 len = num_arg(&user_buffer[i], 10, &value);
1075 if (len < 0)
1076 return len;
1077
1078 i += len;
1079 if (value != pkt_dev->udp_dst_max) {
1080 pkt_dev->udp_dst_max = value;
1081 pkt_dev->cur_udp_dst = value;
1082 }
1083 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1084 return count;
1085 }
1086 if (!strcmp(name, "clone_skb")) {
1087 len = num_arg(&user_buffer[i], 10, &value);
1088 if (len < 0)
1089 return len;
1090 if ((value > 0) &&
1091 ((pkt_dev->xmit_mode == M_NETIF_RECEIVE) ||
1092 !(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1093 return -ENOTSUPP;
1094 i += len;
1095 pkt_dev->clone_skb = value;
1096
1097 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1098 return count;
1099 }
1100 if (!strcmp(name, "count")) {
1101 len = num_arg(&user_buffer[i], 10, &value);
1102 if (len < 0)
1103 return len;
1104
1105 i += len;
1106 pkt_dev->count = value;
1107 sprintf(pg_result, "OK: count=%llu",
1108 (unsigned long long)pkt_dev->count);
1109 return count;
1110 }
1111 if (!strcmp(name, "src_mac_count")) {
1112 len = num_arg(&user_buffer[i], 10, &value);
1113 if (len < 0)
1114 return len;
1115
1116 i += len;
1117 if (pkt_dev->src_mac_count != value) {
1118 pkt_dev->src_mac_count = value;
1119 pkt_dev->cur_src_mac_offset = 0;
1120 }
1121 sprintf(pg_result, "OK: src_mac_count=%d",
1122 pkt_dev->src_mac_count);
1123 return count;
1124 }
1125 if (!strcmp(name, "dst_mac_count")) {
1126 len = num_arg(&user_buffer[i], 10, &value);
1127 if (len < 0)
1128 return len;
1129
1130 i += len;
1131 if (pkt_dev->dst_mac_count != value) {
1132 pkt_dev->dst_mac_count = value;
1133 pkt_dev->cur_dst_mac_offset = 0;
1134 }
1135 sprintf(pg_result, "OK: dst_mac_count=%d",
1136 pkt_dev->dst_mac_count);
1137 return count;
1138 }
1139 if (!strcmp(name, "burst")) {
1140 len = num_arg(&user_buffer[i], 10, &value);
1141 if (len < 0)
1142 return len;
1143
1144 i += len;
1145 if ((value > 1) && (pkt_dev->xmit_mode == M_START_XMIT) &&
1146 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1147 return -ENOTSUPP;
1148 pkt_dev->burst = value < 1 ? 1 : value;
1149 sprintf(pg_result, "OK: burst=%d", pkt_dev->burst);
1150 return count;
1151 }
1152 if (!strcmp(name, "node")) {
1153 len = num_arg(&user_buffer[i], 10, &value);
1154 if (len < 0)
1155 return len;
1156
1157 i += len;
1158
1159 if (node_possible(value)) {
1160 pkt_dev->node = value;
1161 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1162 if (pkt_dev->page) {
1163 put_page(pkt_dev->page);
1164 pkt_dev->page = NULL;
1165 }
1166 }
1167 else
1168 sprintf(pg_result, "ERROR: node not possible");
1169 return count;
1170 }
1171 if (!strcmp(name, "xmit_mode")) {
1172 char f[32];
1173
1174 memset(f, 0, 32);
1175 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1176 if (len < 0)
1177 return len;
1178
1179 if (copy_from_user(f, &user_buffer[i], len))
1180 return -EFAULT;
1181 i += len;
1182
1183 if (strcmp(f, "start_xmit") == 0) {
1184 pkt_dev->xmit_mode = M_START_XMIT;
1185 } else if (strcmp(f, "netif_receive") == 0) {
1186 /* clone_skb set earlier, not supported in this mode */
1187 if (pkt_dev->clone_skb > 0)
1188 return -ENOTSUPP;
1189
1190 pkt_dev->xmit_mode = M_NETIF_RECEIVE;
1191
1192 /* make sure new packet is allocated every time
1193 * pktgen_xmit() is called
1194 */
1195 pkt_dev->last_ok = 1;
1196
1197 /* override clone_skb if user passed default value
1198 * at module loading time
1199 */
1200 pkt_dev->clone_skb = 0;
1201 } else {
1202 sprintf(pg_result,
1203 "xmit_mode -:%s:- unknown\nAvailable modes: %s",
1204 f, "start_xmit, netif_receive\n");
1205 return count;
1206 }
1207 sprintf(pg_result, "OK: xmit_mode=%s", f);
1208 return count;
1209 }
1210 if (!strcmp(name, "flag")) {
1211 char f[32];
1212 memset(f, 0, 32);
1213 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1214 if (len < 0)
1215 return len;
1216
1217 if (copy_from_user(f, &user_buffer[i], len))
1218 return -EFAULT;
1219 i += len;
1220 if (strcmp(f, "IPSRC_RND") == 0)
1221 pkt_dev->flags |= F_IPSRC_RND;
1222
1223 else if (strcmp(f, "!IPSRC_RND") == 0)
1224 pkt_dev->flags &= ~F_IPSRC_RND;
1225
1226 else if (strcmp(f, "TXSIZE_RND") == 0)
1227 pkt_dev->flags |= F_TXSIZE_RND;
1228
1229 else if (strcmp(f, "!TXSIZE_RND") == 0)
1230 pkt_dev->flags &= ~F_TXSIZE_RND;
1231
1232 else if (strcmp(f, "IPDST_RND") == 0)
1233 pkt_dev->flags |= F_IPDST_RND;
1234
1235 else if (strcmp(f, "!IPDST_RND") == 0)
1236 pkt_dev->flags &= ~F_IPDST_RND;
1237
1238 else if (strcmp(f, "UDPSRC_RND") == 0)
1239 pkt_dev->flags |= F_UDPSRC_RND;
1240
1241 else if (strcmp(f, "!UDPSRC_RND") == 0)
1242 pkt_dev->flags &= ~F_UDPSRC_RND;
1243
1244 else if (strcmp(f, "UDPDST_RND") == 0)
1245 pkt_dev->flags |= F_UDPDST_RND;
1246
1247 else if (strcmp(f, "!UDPDST_RND") == 0)
1248 pkt_dev->flags &= ~F_UDPDST_RND;
1249
1250 else if (strcmp(f, "MACSRC_RND") == 0)
1251 pkt_dev->flags |= F_MACSRC_RND;
1252
1253 else if (strcmp(f, "!MACSRC_RND") == 0)
1254 pkt_dev->flags &= ~F_MACSRC_RND;
1255
1256 else if (strcmp(f, "MACDST_RND") == 0)
1257 pkt_dev->flags |= F_MACDST_RND;
1258
1259 else if (strcmp(f, "!MACDST_RND") == 0)
1260 pkt_dev->flags &= ~F_MACDST_RND;
1261
1262 else if (strcmp(f, "MPLS_RND") == 0)
1263 pkt_dev->flags |= F_MPLS_RND;
1264
1265 else if (strcmp(f, "!MPLS_RND") == 0)
1266 pkt_dev->flags &= ~F_MPLS_RND;
1267
1268 else if (strcmp(f, "VID_RND") == 0)
1269 pkt_dev->flags |= F_VID_RND;
1270
1271 else if (strcmp(f, "!VID_RND") == 0)
1272 pkt_dev->flags &= ~F_VID_RND;
1273
1274 else if (strcmp(f, "SVID_RND") == 0)
1275 pkt_dev->flags |= F_SVID_RND;
1276
1277 else if (strcmp(f, "!SVID_RND") == 0)
1278 pkt_dev->flags &= ~F_SVID_RND;
1279
1280 else if (strcmp(f, "FLOW_SEQ") == 0)
1281 pkt_dev->flags |= F_FLOW_SEQ;
1282
1283 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1284 pkt_dev->flags |= F_QUEUE_MAP_RND;
1285
1286 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1287 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1288
1289 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1290 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1291
1292 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1293 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1294#ifdef CONFIG_XFRM
1295 else if (strcmp(f, "IPSEC") == 0)
1296 pkt_dev->flags |= F_IPSEC_ON;
1297#endif
1298
1299 else if (strcmp(f, "!IPV6") == 0)
1300 pkt_dev->flags &= ~F_IPV6;
1301
1302 else if (strcmp(f, "NODE_ALLOC") == 0)
1303 pkt_dev->flags |= F_NODE;
1304
1305 else if (strcmp(f, "!NODE_ALLOC") == 0)
1306 pkt_dev->flags &= ~F_NODE;
1307
1308 else if (strcmp(f, "UDPCSUM") == 0)
1309 pkt_dev->flags |= F_UDPCSUM;
1310
1311 else if (strcmp(f, "!UDPCSUM") == 0)
1312 pkt_dev->flags &= ~F_UDPCSUM;
1313
1314 else if (strcmp(f, "NO_TIMESTAMP") == 0)
1315 pkt_dev->flags |= F_NO_TIMESTAMP;
1316
1317 else if (strcmp(f, "!NO_TIMESTAMP") == 0)
1318 pkt_dev->flags &= ~F_NO_TIMESTAMP;
1319
1320 else {
1321 sprintf(pg_result,
1322 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1323 f,
1324 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1325 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, "
1326 "MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, "
1327 "QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, "
1328 "NO_TIMESTAMP, "
1329#ifdef CONFIG_XFRM
1330 "IPSEC, "
1331#endif
1332 "NODE_ALLOC\n");
1333 return count;
1334 }
1335 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1336 return count;
1337 }
1338 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1339 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1340 if (len < 0)
1341 return len;
1342
1343 if (copy_from_user(buf, &user_buffer[i], len))
1344 return -EFAULT;
1345 buf[len] = 0;
1346 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1347 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1348 strncpy(pkt_dev->dst_min, buf, len);
1349 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1350 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1351 }
1352 if (debug)
1353 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
1354 i += len;
1355 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1356 return count;
1357 }
1358 if (!strcmp(name, "dst_max")) {
1359 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1360 if (len < 0)
1361 return len;
1362
1363
1364 if (copy_from_user(buf, &user_buffer[i], len))
1365 return -EFAULT;
1366
1367 buf[len] = 0;
1368 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1369 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1370 strncpy(pkt_dev->dst_max, buf, len);
1371 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1372 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1373 }
1374 if (debug)
1375 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
1376 i += len;
1377 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1378 return count;
1379 }
1380 if (!strcmp(name, "dst6")) {
1381 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1382 if (len < 0)
1383 return len;
1384
1385 pkt_dev->flags |= F_IPV6;
1386
1387 if (copy_from_user(buf, &user_buffer[i], len))
1388 return -EFAULT;
1389 buf[len] = 0;
1390
1391 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
1392 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1393
1394 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1395
1396 if (debug)
1397 pr_debug("dst6 set to: %s\n", buf);
1398
1399 i += len;
1400 sprintf(pg_result, "OK: dst6=%s", buf);
1401 return count;
1402 }
1403 if (!strcmp(name, "dst6_min")) {
1404 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1405 if (len < 0)
1406 return len;
1407
1408 pkt_dev->flags |= F_IPV6;
1409
1410 if (copy_from_user(buf, &user_buffer[i], len))
1411 return -EFAULT;
1412 buf[len] = 0;
1413
1414 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
1415 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1416
1417 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
1418 if (debug)
1419 pr_debug("dst6_min set to: %s\n", buf);
1420
1421 i += len;
1422 sprintf(pg_result, "OK: dst6_min=%s", buf);
1423 return count;
1424 }
1425 if (!strcmp(name, "dst6_max")) {
1426 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1427 if (len < 0)
1428 return len;
1429
1430 pkt_dev->flags |= F_IPV6;
1431
1432 if (copy_from_user(buf, &user_buffer[i], len))
1433 return -EFAULT;
1434 buf[len] = 0;
1435
1436 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
1437 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1438
1439 if (debug)
1440 pr_debug("dst6_max set to: %s\n", buf);
1441
1442 i += len;
1443 sprintf(pg_result, "OK: dst6_max=%s", buf);
1444 return count;
1445 }
1446 if (!strcmp(name, "src6")) {
1447 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1448 if (len < 0)
1449 return len;
1450
1451 pkt_dev->flags |= F_IPV6;
1452
1453 if (copy_from_user(buf, &user_buffer[i], len))
1454 return -EFAULT;
1455 buf[len] = 0;
1456
1457 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
1458 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1459
1460 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1461
1462 if (debug)
1463 pr_debug("src6 set to: %s\n", buf);
1464
1465 i += len;
1466 sprintf(pg_result, "OK: src6=%s", buf);
1467 return count;
1468 }
1469 if (!strcmp(name, "src_min")) {
1470 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1471 if (len < 0)
1472 return len;
1473
1474 if (copy_from_user(buf, &user_buffer[i], len))
1475 return -EFAULT;
1476 buf[len] = 0;
1477 if (strcmp(buf, pkt_dev->src_min) != 0) {
1478 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1479 strncpy(pkt_dev->src_min, buf, len);
1480 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1481 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1482 }
1483 if (debug)
1484 pr_debug("src_min set to: %s\n", pkt_dev->src_min);
1485 i += len;
1486 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1487 return count;
1488 }
1489 if (!strcmp(name, "src_max")) {
1490 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1491 if (len < 0)
1492 return len;
1493
1494 if (copy_from_user(buf, &user_buffer[i], len))
1495 return -EFAULT;
1496 buf[len] = 0;
1497 if (strcmp(buf, pkt_dev->src_max) != 0) {
1498 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1499 strncpy(pkt_dev->src_max, buf, len);
1500 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1501 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1502 }
1503 if (debug)
1504 pr_debug("src_max set to: %s\n", pkt_dev->src_max);
1505 i += len;
1506 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1507 return count;
1508 }
1509 if (!strcmp(name, "dst_mac")) {
1510 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1511 if (len < 0)
1512 return len;
1513
1514 memset(valstr, 0, sizeof(valstr));
1515 if (copy_from_user(valstr, &user_buffer[i], len))
1516 return -EFAULT;
1517
1518 if (!mac_pton(valstr, pkt_dev->dst_mac))
1519 return -EINVAL;
1520 /* Set up Dest MAC */
1521 ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac);
1522
1523 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1524 return count;
1525 }
1526 if (!strcmp(name, "src_mac")) {
1527 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1528 if (len < 0)
1529 return len;
1530
1531 memset(valstr, 0, sizeof(valstr));
1532 if (copy_from_user(valstr, &user_buffer[i], len))
1533 return -EFAULT;
1534
1535 if (!mac_pton(valstr, pkt_dev->src_mac))
1536 return -EINVAL;
1537 /* Set up Src MAC */
1538 ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac);
1539
1540 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1541 return count;
1542 }
1543
1544 if (!strcmp(name, "clear_counters")) {
1545 pktgen_clear_counters(pkt_dev);
1546 sprintf(pg_result, "OK: Clearing counters.\n");
1547 return count;
1548 }
1549
1550 if (!strcmp(name, "flows")) {
1551 len = num_arg(&user_buffer[i], 10, &value);
1552 if (len < 0)
1553 return len;
1554
1555 i += len;
1556 if (value > MAX_CFLOWS)
1557 value = MAX_CFLOWS;
1558
1559 pkt_dev->cflows = value;
1560 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1561 return count;
1562 }
1563#ifdef CONFIG_XFRM
1564 if (!strcmp(name, "spi")) {
1565 len = num_arg(&user_buffer[i], 10, &value);
1566 if (len < 0)
1567 return len;
1568
1569 i += len;
1570 pkt_dev->spi = value;
1571 sprintf(pg_result, "OK: spi=%u", pkt_dev->spi);
1572 return count;
1573 }
1574#endif
1575 if (!strcmp(name, "flowlen")) {
1576 len = num_arg(&user_buffer[i], 10, &value);
1577 if (len < 0)
1578 return len;
1579
1580 i += len;
1581 pkt_dev->lflow = value;
1582 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1583 return count;
1584 }
1585
1586 if (!strcmp(name, "queue_map_min")) {
1587 len = num_arg(&user_buffer[i], 5, &value);
1588 if (len < 0)
1589 return len;
1590
1591 i += len;
1592 pkt_dev->queue_map_min = value;
1593 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1594 return count;
1595 }
1596
1597 if (!strcmp(name, "queue_map_max")) {
1598 len = num_arg(&user_buffer[i], 5, &value);
1599 if (len < 0)
1600 return len;
1601
1602 i += len;
1603 pkt_dev->queue_map_max = value;
1604 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1605 return count;
1606 }
1607
1608 if (!strcmp(name, "mpls")) {
1609 unsigned int n, cnt;
1610
1611 len = get_labels(&user_buffer[i], pkt_dev);
1612 if (len < 0)
1613 return len;
1614 i += len;
1615 cnt = sprintf(pg_result, "OK: mpls=");
1616 for (n = 0; n < pkt_dev->nr_labels; n++)
1617 cnt += sprintf(pg_result + cnt,
1618 "%08x%s", ntohl(pkt_dev->labels[n]),
1619 n == pkt_dev->nr_labels-1 ? "" : ",");
1620
1621 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1622 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1623 pkt_dev->svlan_id = 0xffff;
1624
1625 if (debug)
1626 pr_debug("VLAN/SVLAN auto turned off\n");
1627 }
1628 return count;
1629 }
1630
1631 if (!strcmp(name, "vlan_id")) {
1632 len = num_arg(&user_buffer[i], 4, &value);
1633 if (len < 0)
1634 return len;
1635
1636 i += len;
1637 if (value <= 4095) {
1638 pkt_dev->vlan_id = value; /* turn on VLAN */
1639
1640 if (debug)
1641 pr_debug("VLAN turned on\n");
1642
1643 if (debug && pkt_dev->nr_labels)
1644 pr_debug("MPLS auto turned off\n");
1645
1646 pkt_dev->nr_labels = 0; /* turn off MPLS */
1647 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1648 } else {
1649 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1650 pkt_dev->svlan_id = 0xffff;
1651
1652 if (debug)
1653 pr_debug("VLAN/SVLAN turned off\n");
1654 }
1655 return count;
1656 }
1657
1658 if (!strcmp(name, "vlan_p")) {
1659 len = num_arg(&user_buffer[i], 1, &value);
1660 if (len < 0)
1661 return len;
1662
1663 i += len;
1664 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1665 pkt_dev->vlan_p = value;
1666 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1667 } else {
1668 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1669 }
1670 return count;
1671 }
1672
1673 if (!strcmp(name, "vlan_cfi")) {
1674 len = num_arg(&user_buffer[i], 1, &value);
1675 if (len < 0)
1676 return len;
1677
1678 i += len;
1679 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1680 pkt_dev->vlan_cfi = value;
1681 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1682 } else {
1683 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1684 }
1685 return count;
1686 }
1687
1688 if (!strcmp(name, "svlan_id")) {
1689 len = num_arg(&user_buffer[i], 4, &value);
1690 if (len < 0)
1691 return len;
1692
1693 i += len;
1694 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1695 pkt_dev->svlan_id = value; /* turn on SVLAN */
1696
1697 if (debug)
1698 pr_debug("SVLAN turned on\n");
1699
1700 if (debug && pkt_dev->nr_labels)
1701 pr_debug("MPLS auto turned off\n");
1702
1703 pkt_dev->nr_labels = 0; /* turn off MPLS */
1704 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1705 } else {
1706 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1707 pkt_dev->svlan_id = 0xffff;
1708
1709 if (debug)
1710 pr_debug("VLAN/SVLAN turned off\n");
1711 }
1712 return count;
1713 }
1714
1715 if (!strcmp(name, "svlan_p")) {
1716 len = num_arg(&user_buffer[i], 1, &value);
1717 if (len < 0)
1718 return len;
1719
1720 i += len;
1721 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1722 pkt_dev->svlan_p = value;
1723 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1724 } else {
1725 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1726 }
1727 return count;
1728 }
1729
1730 if (!strcmp(name, "svlan_cfi")) {
1731 len = num_arg(&user_buffer[i], 1, &value);
1732 if (len < 0)
1733 return len;
1734
1735 i += len;
1736 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1737 pkt_dev->svlan_cfi = value;
1738 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1739 } else {
1740 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1741 }
1742 return count;
1743 }
1744
1745 if (!strcmp(name, "tos")) {
1746 __u32 tmp_value = 0;
1747 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1748 if (len < 0)
1749 return len;
1750
1751 i += len;
1752 if (len == 2) {
1753 pkt_dev->tos = tmp_value;
1754 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1755 } else {
1756 sprintf(pg_result, "ERROR: tos must be 00-ff");
1757 }
1758 return count;
1759 }
1760
1761 if (!strcmp(name, "traffic_class")) {
1762 __u32 tmp_value = 0;
1763 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1764 if (len < 0)
1765 return len;
1766
1767 i += len;
1768 if (len == 2) {
1769 pkt_dev->traffic_class = tmp_value;
1770 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1771 } else {
1772 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1773 }
1774 return count;
1775 }
1776
1777 if (!strcmp(name, "skb_priority")) {
1778 len = num_arg(&user_buffer[i], 9, &value);
1779 if (len < 0)
1780 return len;
1781
1782 i += len;
1783 pkt_dev->skb_priority = value;
1784 sprintf(pg_result, "OK: skb_priority=%i",
1785 pkt_dev->skb_priority);
1786 return count;
1787 }
1788
1789 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1790 return -EINVAL;
1791}
1792
1793static int pktgen_if_open(struct inode *inode, struct file *file)
1794{
1795 return single_open(file, pktgen_if_show, PDE_DATA(inode));
1796}
1797
1798static const struct file_operations pktgen_if_fops = {
1799 .owner = THIS_MODULE,
1800 .open = pktgen_if_open,
1801 .read = seq_read,
1802 .llseek = seq_lseek,
1803 .write = pktgen_if_write,
1804 .release = single_release,
1805};
1806
1807static int pktgen_thread_show(struct seq_file *seq, void *v)
1808{
1809 struct pktgen_thread *t = seq->private;
1810 const struct pktgen_dev *pkt_dev;
1811
1812 BUG_ON(!t);
1813
1814 seq_puts(seq, "Running: ");
1815
1816 rcu_read_lock();
1817 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1818 if (pkt_dev->running)
1819 seq_printf(seq, "%s ", pkt_dev->odevname);
1820
1821 seq_puts(seq, "\nStopped: ");
1822
1823 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1824 if (!pkt_dev->running)
1825 seq_printf(seq, "%s ", pkt_dev->odevname);
1826
1827 if (t->result[0])
1828 seq_printf(seq, "\nResult: %s\n", t->result);
1829 else
1830 seq_puts(seq, "\nResult: NA\n");
1831
1832 rcu_read_unlock();
1833
1834 return 0;
1835}
1836
1837static ssize_t pktgen_thread_write(struct file *file,
1838 const char __user * user_buffer,
1839 size_t count, loff_t * offset)
1840{
1841 struct seq_file *seq = file->private_data;
1842 struct pktgen_thread *t = seq->private;
1843 int i, max, len, ret;
1844 char name[40];
1845 char *pg_result;
1846
1847 if (count < 1) {
1848 // sprintf(pg_result, "Wrong command format");
1849 return -EINVAL;
1850 }
1851
1852 max = count;
1853 len = count_trail_chars(user_buffer, max);
1854 if (len < 0)
1855 return len;
1856
1857 i = len;
1858
1859 /* Read variable name */
1860
1861 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1862 if (len < 0)
1863 return len;
1864
1865 memset(name, 0, sizeof(name));
1866 if (copy_from_user(name, &user_buffer[i], len))
1867 return -EFAULT;
1868 i += len;
1869
1870 max = count - i;
1871 len = count_trail_chars(&user_buffer[i], max);
1872 if (len < 0)
1873 return len;
1874
1875 i += len;
1876
1877 if (debug)
1878 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
1879
1880 if (!t) {
1881 pr_err("ERROR: No thread\n");
1882 ret = -EINVAL;
1883 goto out;
1884 }
1885
1886 pg_result = &(t->result[0]);
1887
1888 if (!strcmp(name, "add_device")) {
1889 char f[32];
1890 memset(f, 0, 32);
1891 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1892 if (len < 0) {
1893 ret = len;
1894 goto out;
1895 }
1896 if (copy_from_user(f, &user_buffer[i], len))
1897 return -EFAULT;
1898 i += len;
1899 mutex_lock(&pktgen_thread_lock);
1900 ret = pktgen_add_device(t, f);
1901 mutex_unlock(&pktgen_thread_lock);
1902 if (!ret) {
1903 ret = count;
1904 sprintf(pg_result, "OK: add_device=%s", f);
1905 } else
1906 sprintf(pg_result, "ERROR: can not add device %s", f);
1907 goto out;
1908 }
1909
1910 if (!strcmp(name, "rem_device_all")) {
1911 mutex_lock(&pktgen_thread_lock);
1912 t->control |= T_REMDEVALL;
1913 mutex_unlock(&pktgen_thread_lock);
1914 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1915 ret = count;
1916 sprintf(pg_result, "OK: rem_device_all");
1917 goto out;
1918 }
1919
1920 if (!strcmp(name, "max_before_softirq")) {
1921 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1922 ret = count;
1923 goto out;
1924 }
1925
1926 ret = -EINVAL;
1927out:
1928 return ret;
1929}
1930
1931static int pktgen_thread_open(struct inode *inode, struct file *file)
1932{
1933 return single_open(file, pktgen_thread_show, PDE_DATA(inode));
1934}
1935
1936static const struct file_operations pktgen_thread_fops = {
1937 .owner = THIS_MODULE,
1938 .open = pktgen_thread_open,
1939 .read = seq_read,
1940 .llseek = seq_lseek,
1941 .write = pktgen_thread_write,
1942 .release = single_release,
1943};
1944
1945/* Think find or remove for NN */
1946static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn,
1947 const char *ifname, int remove)
1948{
1949 struct pktgen_thread *t;
1950 struct pktgen_dev *pkt_dev = NULL;
1951 bool exact = (remove == FIND);
1952
1953 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1954 pkt_dev = pktgen_find_dev(t, ifname, exact);
1955 if (pkt_dev) {
1956 if (remove) {
1957 pkt_dev->removal_mark = 1;
1958 t->control |= T_REMDEV;
1959 }
1960 break;
1961 }
1962 }
1963 return pkt_dev;
1964}
1965
1966/*
1967 * mark a device for removal
1968 */
1969static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname)
1970{
1971 struct pktgen_dev *pkt_dev = NULL;
1972 const int max_tries = 10, msec_per_try = 125;
1973 int i = 0;
1974
1975 mutex_lock(&pktgen_thread_lock);
1976 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1977
1978 while (1) {
1979
1980 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE);
1981 if (pkt_dev == NULL)
1982 break; /* success */
1983
1984 mutex_unlock(&pktgen_thread_lock);
1985 pr_debug("%s: waiting for %s to disappear....\n",
1986 __func__, ifname);
1987 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1988 mutex_lock(&pktgen_thread_lock);
1989
1990 if (++i >= max_tries) {
1991 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1992 __func__, msec_per_try * i, ifname);
1993 break;
1994 }
1995
1996 }
1997
1998 mutex_unlock(&pktgen_thread_lock);
1999}
2000
2001static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev)
2002{
2003 struct pktgen_thread *t;
2004
2005 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
2006 struct pktgen_dev *pkt_dev;
2007
2008 rcu_read_lock();
2009 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
2010 if (pkt_dev->odev != dev)
2011 continue;
2012
2013 proc_remove(pkt_dev->entry);
2014
2015 pkt_dev->entry = proc_create_data(dev->name, 0600,
2016 pn->proc_dir,
2017 &pktgen_if_fops,
2018 pkt_dev);
2019 if (!pkt_dev->entry)
2020 pr_err("can't move proc entry for '%s'\n",
2021 dev->name);
2022 break;
2023 }
2024 rcu_read_unlock();
2025 }
2026}
2027
2028static int pktgen_device_event(struct notifier_block *unused,
2029 unsigned long event, void *ptr)
2030{
2031 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2032 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id);
2033
2034 if (pn->pktgen_exiting)
2035 return NOTIFY_DONE;
2036
2037 /* It is OK that we do not hold the group lock right now,
2038 * as we run under the RTNL lock.
2039 */
2040
2041 switch (event) {
2042 case NETDEV_CHANGENAME:
2043 pktgen_change_name(pn, dev);
2044 break;
2045
2046 case NETDEV_UNREGISTER:
2047 pktgen_mark_device(pn, dev->name);
2048 break;
2049 }
2050
2051 return NOTIFY_DONE;
2052}
2053
2054static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn,
2055 struct pktgen_dev *pkt_dev,
2056 const char *ifname)
2057{
2058 char b[IFNAMSIZ+5];
2059 int i;
2060
2061 for (i = 0; ifname[i] != '@'; i++) {
2062 if (i == IFNAMSIZ)
2063 break;
2064
2065 b[i] = ifname[i];
2066 }
2067 b[i] = 0;
2068
2069 return dev_get_by_name(pn->net, b);
2070}
2071
2072
2073/* Associate pktgen_dev with a device. */
2074
2075static int pktgen_setup_dev(const struct pktgen_net *pn,
2076 struct pktgen_dev *pkt_dev, const char *ifname)
2077{
2078 struct net_device *odev;
2079 int err;
2080
2081 /* Clean old setups */
2082 if (pkt_dev->odev) {
2083 dev_put(pkt_dev->odev);
2084 pkt_dev->odev = NULL;
2085 }
2086
2087 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname);
2088 if (!odev) {
2089 pr_err("no such netdevice: \"%s\"\n", ifname);
2090 return -ENODEV;
2091 }
2092
2093 if (odev->type != ARPHRD_ETHER) {
2094 pr_err("not an ethernet device: \"%s\"\n", ifname);
2095 err = -EINVAL;
2096 } else if (!netif_running(odev)) {
2097 pr_err("device is down: \"%s\"\n", ifname);
2098 err = -ENETDOWN;
2099 } else {
2100 pkt_dev->odev = odev;
2101 return 0;
2102 }
2103
2104 dev_put(odev);
2105 return err;
2106}
2107
2108/* Read pkt_dev from the interface and set up internal pktgen_dev
2109 * structure to have the right information to create/send packets
2110 */
2111static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2112{
2113 int ntxq;
2114
2115 if (!pkt_dev->odev) {
2116 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2117 sprintf(pkt_dev->result,
2118 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2119 return;
2120 }
2121
2122 /* make sure that we don't pick a non-existing transmit queue */
2123 ntxq = pkt_dev->odev->real_num_tx_queues;
2124
2125 if (ntxq <= pkt_dev->queue_map_min) {
2126 pr_warn("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2127 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2128 pkt_dev->odevname);
2129 pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2130 }
2131 if (pkt_dev->queue_map_max >= ntxq) {
2132 pr_warn("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2133 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2134 pkt_dev->odevname);
2135 pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2136 }
2137
2138 /* Default to the interface's mac if not explicitly set. */
2139
2140 if (is_zero_ether_addr(pkt_dev->src_mac))
2141 ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr);
2142
2143 /* Set up Dest MAC */
2144 ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac);
2145
2146 if (pkt_dev->flags & F_IPV6) {
2147 int i, set = 0, err = 1;
2148 struct inet6_dev *idev;
2149
2150 if (pkt_dev->min_pkt_size == 0) {
2151 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
2152 + sizeof(struct udphdr)
2153 + sizeof(struct pktgen_hdr)
2154 + pkt_dev->pkt_overhead;
2155 }
2156
2157 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2158 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2159 set = 1;
2160 break;
2161 }
2162
2163 if (!set) {
2164
2165 /*
2166 * Use linklevel address if unconfigured.
2167 *
2168 * use ipv6_get_lladdr if/when it's get exported
2169 */
2170
2171 rcu_read_lock();
2172 idev = __in6_dev_get(pkt_dev->odev);
2173 if (idev) {
2174 struct inet6_ifaddr *ifp;
2175
2176 read_lock_bh(&idev->lock);
2177 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2178 if ((ifp->scope & IFA_LINK) &&
2179 !(ifp->flags & IFA_F_TENTATIVE)) {
2180 pkt_dev->cur_in6_saddr = ifp->addr;
2181 err = 0;
2182 break;
2183 }
2184 }
2185 read_unlock_bh(&idev->lock);
2186 }
2187 rcu_read_unlock();
2188 if (err)
2189 pr_err("ERROR: IPv6 link address not available\n");
2190 }
2191 } else {
2192 if (pkt_dev->min_pkt_size == 0) {
2193 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
2194 + sizeof(struct udphdr)
2195 + sizeof(struct pktgen_hdr)
2196 + pkt_dev->pkt_overhead;
2197 }
2198
2199 pkt_dev->saddr_min = 0;
2200 pkt_dev->saddr_max = 0;
2201 if (strlen(pkt_dev->src_min) == 0) {
2202
2203 struct in_device *in_dev;
2204
2205 rcu_read_lock();
2206 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2207 if (in_dev) {
2208 if (in_dev->ifa_list) {
2209 pkt_dev->saddr_min =
2210 in_dev->ifa_list->ifa_address;
2211 pkt_dev->saddr_max = pkt_dev->saddr_min;
2212 }
2213 }
2214 rcu_read_unlock();
2215 } else {
2216 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2217 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2218 }
2219
2220 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2221 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2222 }
2223 /* Initialize current values. */
2224 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2225 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
2226 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
2227
2228 pkt_dev->cur_dst_mac_offset = 0;
2229 pkt_dev->cur_src_mac_offset = 0;
2230 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2231 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2232 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2233 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2234 pkt_dev->nflows = 0;
2235}
2236
2237
2238static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2239{
2240 ktime_t start_time, end_time;
2241 s64 remaining;
2242 struct hrtimer_sleeper t;
2243
2244 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2245 hrtimer_set_expires(&t.timer, spin_until);
2246
2247 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2248 if (remaining <= 0) {
2249 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2250 return;
2251 }
2252
2253 start_time = ktime_get();
2254 if (remaining < 100000) {
2255 /* for small delays (<100us), just loop until limit is reached */
2256 do {
2257 end_time = ktime_get();
2258 } while (ktime_compare(end_time, spin_until) < 0);
2259 } else {
2260 /* see do_nanosleep */
2261 hrtimer_init_sleeper(&t, current);
2262 do {
2263 set_current_state(TASK_INTERRUPTIBLE);
2264 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2265
2266 if (likely(t.task))
2267 schedule();
2268
2269 hrtimer_cancel(&t.timer);
2270 } while (t.task && pkt_dev->running && !signal_pending(current));
2271 __set_current_state(TASK_RUNNING);
2272 end_time = ktime_get();
2273 }
2274
2275 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2276 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2277}
2278
2279static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2280{
2281 pkt_dev->pkt_overhead = LL_RESERVED_SPACE(pkt_dev->odev);
2282 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2283 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2284 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2285}
2286
2287static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2288{
2289 return !!(pkt_dev->flows[flow].flags & F_INIT);
2290}
2291
2292static inline int f_pick(struct pktgen_dev *pkt_dev)
2293{
2294 int flow = pkt_dev->curfl;
2295
2296 if (pkt_dev->flags & F_FLOW_SEQ) {
2297 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2298 /* reset time */
2299 pkt_dev->flows[flow].count = 0;
2300 pkt_dev->flows[flow].flags = 0;
2301 pkt_dev->curfl += 1;
2302 if (pkt_dev->curfl >= pkt_dev->cflows)
2303 pkt_dev->curfl = 0; /*reset */
2304 }
2305 } else {
2306 flow = prandom_u32() % pkt_dev->cflows;
2307 pkt_dev->curfl = flow;
2308
2309 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2310 pkt_dev->flows[flow].count = 0;
2311 pkt_dev->flows[flow].flags = 0;
2312 }
2313 }
2314
2315 return pkt_dev->curfl;
2316}
2317
2318
2319#ifdef CONFIG_XFRM
2320/* If there was already an IPSEC SA, we keep it as is, else
2321 * we go look for it ...
2322*/
2323#define DUMMY_MARK 0
2324static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2325{
2326 struct xfrm_state *x = pkt_dev->flows[flow].x;
2327 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
2328 if (!x) {
2329
2330 if (pkt_dev->spi) {
2331 /* We need as quick as possible to find the right SA
2332 * Searching with minimum criteria to archieve this.
2333 */
2334 x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET);
2335 } else {
2336 /* slow path: we dont already have xfrm_state */
2337 x = xfrm_stateonly_find(pn->net, DUMMY_MARK,
2338 (xfrm_address_t *)&pkt_dev->cur_daddr,
2339 (xfrm_address_t *)&pkt_dev->cur_saddr,
2340 AF_INET,
2341 pkt_dev->ipsmode,
2342 pkt_dev->ipsproto, 0);
2343 }
2344 if (x) {
2345 pkt_dev->flows[flow].x = x;
2346 set_pkt_overhead(pkt_dev);
2347 pkt_dev->pkt_overhead += x->props.header_len;
2348 }
2349
2350 }
2351}
2352#endif
2353static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2354{
2355
2356 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2357 pkt_dev->cur_queue_map = smp_processor_id();
2358
2359 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2360 __u16 t;
2361 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2362 t = prandom_u32() %
2363 (pkt_dev->queue_map_max -
2364 pkt_dev->queue_map_min + 1)
2365 + pkt_dev->queue_map_min;
2366 } else {
2367 t = pkt_dev->cur_queue_map + 1;
2368 if (t > pkt_dev->queue_map_max)
2369 t = pkt_dev->queue_map_min;
2370 }
2371 pkt_dev->cur_queue_map = t;
2372 }
2373 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2374}
2375
2376/* Increment/randomize headers according to flags and current values
2377 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2378 */
2379static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2380{
2381 __u32 imn;
2382 __u32 imx;
2383 int flow = 0;
2384
2385 if (pkt_dev->cflows)
2386 flow = f_pick(pkt_dev);
2387
2388 /* Deal with source MAC */
2389 if (pkt_dev->src_mac_count > 1) {
2390 __u32 mc;
2391 __u32 tmp;
2392
2393 if (pkt_dev->flags & F_MACSRC_RND)
2394 mc = prandom_u32() % pkt_dev->src_mac_count;
2395 else {
2396 mc = pkt_dev->cur_src_mac_offset++;
2397 if (pkt_dev->cur_src_mac_offset >=
2398 pkt_dev->src_mac_count)
2399 pkt_dev->cur_src_mac_offset = 0;
2400 }
2401
2402 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2403 pkt_dev->hh[11] = tmp;
2404 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2405 pkt_dev->hh[10] = tmp;
2406 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2407 pkt_dev->hh[9] = tmp;
2408 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2409 pkt_dev->hh[8] = tmp;
2410 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2411 pkt_dev->hh[7] = tmp;
2412 }
2413
2414 /* Deal with Destination MAC */
2415 if (pkt_dev->dst_mac_count > 1) {
2416 __u32 mc;
2417 __u32 tmp;
2418
2419 if (pkt_dev->flags & F_MACDST_RND)
2420 mc = prandom_u32() % pkt_dev->dst_mac_count;
2421
2422 else {
2423 mc = pkt_dev->cur_dst_mac_offset++;
2424 if (pkt_dev->cur_dst_mac_offset >=
2425 pkt_dev->dst_mac_count) {
2426 pkt_dev->cur_dst_mac_offset = 0;
2427 }
2428 }
2429
2430 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2431 pkt_dev->hh[5] = tmp;
2432 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2433 pkt_dev->hh[4] = tmp;
2434 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2435 pkt_dev->hh[3] = tmp;
2436 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2437 pkt_dev->hh[2] = tmp;
2438 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2439 pkt_dev->hh[1] = tmp;
2440 }
2441
2442 if (pkt_dev->flags & F_MPLS_RND) {
2443 unsigned int i;
2444 for (i = 0; i < pkt_dev->nr_labels; i++)
2445 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2446 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2447 ((__force __be32)prandom_u32() &
2448 htonl(0x000fffff));
2449 }
2450
2451 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2452 pkt_dev->vlan_id = prandom_u32() & (4096 - 1);
2453 }
2454
2455 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2456 pkt_dev->svlan_id = prandom_u32() & (4096 - 1);
2457 }
2458
2459 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2460 if (pkt_dev->flags & F_UDPSRC_RND)
2461 pkt_dev->cur_udp_src = prandom_u32() %
2462 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2463 + pkt_dev->udp_src_min;
2464
2465 else {
2466 pkt_dev->cur_udp_src++;
2467 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2468 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2469 }
2470 }
2471
2472 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2473 if (pkt_dev->flags & F_UDPDST_RND) {
2474 pkt_dev->cur_udp_dst = prandom_u32() %
2475 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2476 + pkt_dev->udp_dst_min;
2477 } else {
2478 pkt_dev->cur_udp_dst++;
2479 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2480 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2481 }
2482 }
2483
2484 if (!(pkt_dev->flags & F_IPV6)) {
2485
2486 imn = ntohl(pkt_dev->saddr_min);
2487 imx = ntohl(pkt_dev->saddr_max);
2488 if (imn < imx) {
2489 __u32 t;
2490 if (pkt_dev->flags & F_IPSRC_RND)
2491 t = prandom_u32() % (imx - imn) + imn;
2492 else {
2493 t = ntohl(pkt_dev->cur_saddr);
2494 t++;
2495 if (t > imx)
2496 t = imn;
2497
2498 }
2499 pkt_dev->cur_saddr = htonl(t);
2500 }
2501
2502 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2503 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2504 } else {
2505 imn = ntohl(pkt_dev->daddr_min);
2506 imx = ntohl(pkt_dev->daddr_max);
2507 if (imn < imx) {
2508 __u32 t;
2509 __be32 s;
2510 if (pkt_dev->flags & F_IPDST_RND) {
2511
2512 do {
2513 t = prandom_u32() %
2514 (imx - imn) + imn;
2515 s = htonl(t);
2516 } while (ipv4_is_loopback(s) ||
2517 ipv4_is_multicast(s) ||
2518 ipv4_is_lbcast(s) ||
2519 ipv4_is_zeronet(s) ||
2520 ipv4_is_local_multicast(s));
2521 pkt_dev->cur_daddr = s;
2522 } else {
2523 t = ntohl(pkt_dev->cur_daddr);
2524 t++;
2525 if (t > imx) {
2526 t = imn;
2527 }
2528 pkt_dev->cur_daddr = htonl(t);
2529 }
2530 }
2531 if (pkt_dev->cflows) {
2532 pkt_dev->flows[flow].flags |= F_INIT;
2533 pkt_dev->flows[flow].cur_daddr =
2534 pkt_dev->cur_daddr;
2535#ifdef CONFIG_XFRM
2536 if (pkt_dev->flags & F_IPSEC_ON)
2537 get_ipsec_sa(pkt_dev, flow);
2538#endif
2539 pkt_dev->nflows++;
2540 }
2541 }
2542 } else { /* IPV6 * */
2543
2544 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
2545 int i;
2546
2547 /* Only random destinations yet */
2548
2549 for (i = 0; i < 4; i++) {
2550 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2551 (((__force __be32)prandom_u32() |
2552 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2553 pkt_dev->max_in6_daddr.s6_addr32[i]);
2554 }
2555 }
2556 }
2557
2558 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2559 __u32 t;
2560 if (pkt_dev->flags & F_TXSIZE_RND) {
2561 t = prandom_u32() %
2562 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2563 + pkt_dev->min_pkt_size;
2564 } else {
2565 t = pkt_dev->cur_pkt_size + 1;
2566 if (t > pkt_dev->max_pkt_size)
2567 t = pkt_dev->min_pkt_size;
2568 }
2569 pkt_dev->cur_pkt_size = t;
2570 }
2571
2572 set_cur_queue_map(pkt_dev);
2573
2574 pkt_dev->flows[flow].count++;
2575}
2576
2577
2578#ifdef CONFIG_XFRM
2579static u32 pktgen_dst_metrics[RTAX_MAX + 1] = {
2580
2581 [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */
2582};
2583
2584static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2585{
2586 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2587 int err = 0;
2588 struct net *net = dev_net(pkt_dev->odev);
2589
2590 if (!x)
2591 return 0;
2592 /* XXX: we dont support tunnel mode for now until
2593 * we resolve the dst issue */
2594 if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0))
2595 return 0;
2596
2597 /* But when user specify an valid SPI, transformation
2598 * supports both transport/tunnel mode + ESP/AH type.
2599 */
2600 if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0))
2601 skb->_skb_refdst = (unsigned long)&pkt_dev->dst | SKB_DST_NOREF;
2602
2603 rcu_read_lock_bh();
2604 err = x->outer_mode->output(x, skb);
2605 rcu_read_unlock_bh();
2606 if (err) {
2607 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR);
2608 goto error;
2609 }
2610 err = x->type->output(x, skb);
2611 if (err) {
2612 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR);
2613 goto error;
2614 }
2615 spin_lock_bh(&x->lock);
2616 x->curlft.bytes += skb->len;
2617 x->curlft.packets++;
2618 spin_unlock_bh(&x->lock);
2619error:
2620 return err;
2621}
2622
2623static void free_SAs(struct pktgen_dev *pkt_dev)
2624{
2625 if (pkt_dev->cflows) {
2626 /* let go of the SAs if we have them */
2627 int i;
2628 for (i = 0; i < pkt_dev->cflows; i++) {
2629 struct xfrm_state *x = pkt_dev->flows[i].x;
2630 if (x) {
2631 xfrm_state_put(x);
2632 pkt_dev->flows[i].x = NULL;
2633 }
2634 }
2635 }
2636}
2637
2638static int process_ipsec(struct pktgen_dev *pkt_dev,
2639 struct sk_buff *skb, __be16 protocol)
2640{
2641 if (pkt_dev->flags & F_IPSEC_ON) {
2642 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2643 int nhead = 0;
2644 if (x) {
2645 struct ethhdr *eth;
2646 struct iphdr *iph;
2647 int ret;
2648
2649 nhead = x->props.header_len - skb_headroom(skb);
2650 if (nhead > 0) {
2651 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2652 if (ret < 0) {
2653 pr_err("Error expanding ipsec packet %d\n",
2654 ret);
2655 goto err;
2656 }
2657 }
2658
2659 /* ipsec is not expecting ll header */
2660 skb_pull(skb, ETH_HLEN);
2661 ret = pktgen_output_ipsec(skb, pkt_dev);
2662 if (ret) {
2663 pr_err("Error creating ipsec packet %d\n", ret);
2664 goto err;
2665 }
2666 /* restore ll */
2667 eth = (struct ethhdr *)skb_push(skb, ETH_HLEN);
2668 memcpy(eth, pkt_dev->hh, 2 * ETH_ALEN);
2669 eth->h_proto = protocol;
2670
2671 /* Update IPv4 header len as well as checksum value */
2672 iph = ip_hdr(skb);
2673 iph->tot_len = htons(skb->len - ETH_HLEN);
2674 ip_send_check(iph);
2675 }
2676 }
2677 return 1;
2678err:
2679 kfree_skb(skb);
2680 return 0;
2681}
2682#endif
2683
2684static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2685{
2686 unsigned int i;
2687 for (i = 0; i < pkt_dev->nr_labels; i++)
2688 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2689
2690 mpls--;
2691 *mpls |= MPLS_STACK_BOTTOM;
2692}
2693
2694static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2695 unsigned int prio)
2696{
2697 return htons(id | (cfi << 12) | (prio << 13));
2698}
2699
2700static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2701 int datalen)
2702{
2703 struct timeval timestamp;
2704 struct pktgen_hdr *pgh;
2705
2706 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
2707 datalen -= sizeof(*pgh);
2708
2709 if (pkt_dev->nfrags <= 0) {
2710 memset(skb_put(skb, datalen), 0, datalen);
2711 } else {
2712 int frags = pkt_dev->nfrags;
2713 int i, len;
2714 int frag_len;
2715
2716
2717 if (frags > MAX_SKB_FRAGS)
2718 frags = MAX_SKB_FRAGS;
2719 len = datalen - frags * PAGE_SIZE;
2720 if (len > 0) {
2721 memset(skb_put(skb, len), 0, len);
2722 datalen = frags * PAGE_SIZE;
2723 }
2724
2725 i = 0;
2726 frag_len = (datalen/frags) < PAGE_SIZE ?
2727 (datalen/frags) : PAGE_SIZE;
2728 while (datalen > 0) {
2729 if (unlikely(!pkt_dev->page)) {
2730 int node = numa_node_id();
2731
2732 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2733 node = pkt_dev->node;
2734 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2735 if (!pkt_dev->page)
2736 break;
2737 }
2738 get_page(pkt_dev->page);
2739 skb_frag_set_page(skb, i, pkt_dev->page);
2740 skb_shinfo(skb)->frags[i].page_offset = 0;
2741 /*last fragment, fill rest of data*/
2742 if (i == (frags - 1))
2743 skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2744 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2745 else
2746 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2747 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2748 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2749 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2750 i++;
2751 skb_shinfo(skb)->nr_frags = i;
2752 }
2753 }
2754
2755 /* Stamp the time, and sequence number,
2756 * convert them to network byte order
2757 */
2758 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2759 pgh->seq_num = htonl(pkt_dev->seq_num);
2760
2761 if (pkt_dev->flags & F_NO_TIMESTAMP) {
2762 pgh->tv_sec = 0;
2763 pgh->tv_usec = 0;
2764 } else {
2765 do_gettimeofday(×tamp);
2766 pgh->tv_sec = htonl(timestamp.tv_sec);
2767 pgh->tv_usec = htonl(timestamp.tv_usec);
2768 }
2769}
2770
2771static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
2772 struct pktgen_dev *pkt_dev,
2773 unsigned int extralen)
2774{
2775 struct sk_buff *skb = NULL;
2776 unsigned int size = pkt_dev->cur_pkt_size + 64 + extralen +
2777 pkt_dev->pkt_overhead;
2778
2779 if (pkt_dev->flags & F_NODE) {
2780 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id();
2781
2782 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node);
2783 if (likely(skb)) {
2784 skb_reserve(skb, NET_SKB_PAD);
2785 skb->dev = dev;
2786 }
2787 } else {
2788 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
2789 }
2790
2791 if (likely(skb))
2792 skb_reserve(skb, LL_RESERVED_SPACE(dev));
2793
2794 return skb;
2795}
2796
2797static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2798 struct pktgen_dev *pkt_dev)
2799{
2800 struct sk_buff *skb = NULL;
2801 __u8 *eth;
2802 struct udphdr *udph;
2803 int datalen, iplen;
2804 struct iphdr *iph;
2805 __be16 protocol = htons(ETH_P_IP);
2806 __be32 *mpls;
2807 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2808 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2809 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2810 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2811 u16 queue_map;
2812
2813 if (pkt_dev->nr_labels)
2814 protocol = htons(ETH_P_MPLS_UC);
2815
2816 if (pkt_dev->vlan_id != 0xffff)
2817 protocol = htons(ETH_P_8021Q);
2818
2819 /* Update any of the values, used when we're incrementing various
2820 * fields.
2821 */
2822 mod_cur_headers(pkt_dev);
2823 queue_map = pkt_dev->cur_queue_map;
2824
2825 datalen = (odev->hard_header_len + 16) & ~0xf;
2826
2827 skb = pktgen_alloc_skb(odev, pkt_dev, datalen);
2828 if (!skb) {
2829 sprintf(pkt_dev->result, "No memory");
2830 return NULL;
2831 }
2832
2833 prefetchw(skb->data);
2834 skb_reserve(skb, datalen);
2835
2836 /* Reserve for ethernet and IP header */
2837 eth = (__u8 *) skb_push(skb, 14);
2838 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2839 if (pkt_dev->nr_labels)
2840 mpls_push(mpls, pkt_dev);
2841
2842 if (pkt_dev->vlan_id != 0xffff) {
2843 if (pkt_dev->svlan_id != 0xffff) {
2844 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2845 *svlan_tci = build_tci(pkt_dev->svlan_id,
2846 pkt_dev->svlan_cfi,
2847 pkt_dev->svlan_p);
2848 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2849 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2850 }
2851 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2852 *vlan_tci = build_tci(pkt_dev->vlan_id,
2853 pkt_dev->vlan_cfi,
2854 pkt_dev->vlan_p);
2855 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2856 *vlan_encapsulated_proto = htons(ETH_P_IP);
2857 }
2858
2859 skb_reset_mac_header(skb);
2860 skb_set_network_header(skb, skb->len);
2861 iph = (struct iphdr *) skb_put(skb, sizeof(struct iphdr));
2862
2863 skb_set_transport_header(skb, skb->len);
2864 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2865 skb_set_queue_mapping(skb, queue_map);
2866 skb->priority = pkt_dev->skb_priority;
2867
2868 memcpy(eth, pkt_dev->hh, 12);
2869 *(__be16 *) & eth[12] = protocol;
2870
2871 /* Eth + IPh + UDPh + mpls */
2872 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2873 pkt_dev->pkt_overhead;
2874 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
2875 datalen = sizeof(struct pktgen_hdr);
2876
2877 udph->source = htons(pkt_dev->cur_udp_src);
2878 udph->dest = htons(pkt_dev->cur_udp_dst);
2879 udph->len = htons(datalen + 8); /* DATA + udphdr */
2880 udph->check = 0;
2881
2882 iph->ihl = 5;
2883 iph->version = 4;
2884 iph->ttl = 32;
2885 iph->tos = pkt_dev->tos;
2886 iph->protocol = IPPROTO_UDP; /* UDP */
2887 iph->saddr = pkt_dev->cur_saddr;
2888 iph->daddr = pkt_dev->cur_daddr;
2889 iph->id = htons(pkt_dev->ip_id);
2890 pkt_dev->ip_id++;
2891 iph->frag_off = 0;
2892 iplen = 20 + 8 + datalen;
2893 iph->tot_len = htons(iplen);
2894 ip_send_check(iph);
2895 skb->protocol = protocol;
2896 skb->dev = odev;
2897 skb->pkt_type = PACKET_HOST;
2898
2899 pktgen_finalize_skb(pkt_dev, skb, datalen);
2900
2901 if (!(pkt_dev->flags & F_UDPCSUM)) {
2902 skb->ip_summed = CHECKSUM_NONE;
2903 } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IP_CSUM)) {
2904 skb->ip_summed = CHECKSUM_PARTIAL;
2905 skb->csum = 0;
2906 udp4_hwcsum(skb, iph->saddr, iph->daddr);
2907 } else {
2908 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), datalen + 8, 0);
2909
2910 /* add protocol-dependent pseudo-header */
2911 udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
2912 datalen + 8, IPPROTO_UDP, csum);
2913
2914 if (udph->check == 0)
2915 udph->check = CSUM_MANGLED_0;
2916 }
2917
2918#ifdef CONFIG_XFRM
2919 if (!process_ipsec(pkt_dev, skb, protocol))
2920 return NULL;
2921#endif
2922
2923 return skb;
2924}
2925
2926static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2927 struct pktgen_dev *pkt_dev)
2928{
2929 struct sk_buff *skb = NULL;
2930 __u8 *eth;
2931 struct udphdr *udph;
2932 int datalen, udplen;
2933 struct ipv6hdr *iph;
2934 __be16 protocol = htons(ETH_P_IPV6);
2935 __be32 *mpls;
2936 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2937 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2938 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2939 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2940 u16 queue_map;
2941
2942 if (pkt_dev->nr_labels)
2943 protocol = htons(ETH_P_MPLS_UC);
2944
2945 if (pkt_dev->vlan_id != 0xffff)
2946 protocol = htons(ETH_P_8021Q);
2947
2948 /* Update any of the values, used when we're incrementing various
2949 * fields.
2950 */
2951 mod_cur_headers(pkt_dev);
2952 queue_map = pkt_dev->cur_queue_map;
2953
2954 skb = pktgen_alloc_skb(odev, pkt_dev, 16);
2955 if (!skb) {
2956 sprintf(pkt_dev->result, "No memory");
2957 return NULL;
2958 }
2959
2960 prefetchw(skb->data);
2961 skb_reserve(skb, 16);
2962
2963 /* Reserve for ethernet and IP header */
2964 eth = (__u8 *) skb_push(skb, 14);
2965 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2966 if (pkt_dev->nr_labels)
2967 mpls_push(mpls, pkt_dev);
2968
2969 if (pkt_dev->vlan_id != 0xffff) {
2970 if (pkt_dev->svlan_id != 0xffff) {
2971 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2972 *svlan_tci = build_tci(pkt_dev->svlan_id,
2973 pkt_dev->svlan_cfi,
2974 pkt_dev->svlan_p);
2975 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2976 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2977 }
2978 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2979 *vlan_tci = build_tci(pkt_dev->vlan_id,
2980 pkt_dev->vlan_cfi,
2981 pkt_dev->vlan_p);
2982 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2983 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2984 }
2985
2986 skb_reset_mac_header(skb);
2987 skb_set_network_header(skb, skb->len);
2988 iph = (struct ipv6hdr *) skb_put(skb, sizeof(struct ipv6hdr));
2989
2990 skb_set_transport_header(skb, skb->len);
2991 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2992 skb_set_queue_mapping(skb, queue_map);
2993 skb->priority = pkt_dev->skb_priority;
2994
2995 memcpy(eth, pkt_dev->hh, 12);
2996 *(__be16 *) ð[12] = protocol;
2997
2998 /* Eth + IPh + UDPh + mpls */
2999 datalen = pkt_dev->cur_pkt_size - 14 -
3000 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
3001 pkt_dev->pkt_overhead;
3002
3003 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
3004 datalen = sizeof(struct pktgen_hdr);
3005 net_info_ratelimited("increased datalen to %d\n", datalen);
3006 }
3007
3008 udplen = datalen + sizeof(struct udphdr);
3009 udph->source = htons(pkt_dev->cur_udp_src);
3010 udph->dest = htons(pkt_dev->cur_udp_dst);
3011 udph->len = htons(udplen);
3012 udph->check = 0;
3013
3014 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
3015
3016 if (pkt_dev->traffic_class) {
3017 /* Version + traffic class + flow (0) */
3018 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
3019 }
3020
3021 iph->hop_limit = 32;
3022
3023 iph->payload_len = htons(udplen);
3024 iph->nexthdr = IPPROTO_UDP;
3025
3026 iph->daddr = pkt_dev->cur_in6_daddr;
3027 iph->saddr = pkt_dev->cur_in6_saddr;
3028
3029 skb->protocol = protocol;
3030 skb->dev = odev;
3031 skb->pkt_type = PACKET_HOST;
3032
3033 pktgen_finalize_skb(pkt_dev, skb, datalen);
3034
3035 if (!(pkt_dev->flags & F_UDPCSUM)) {
3036 skb->ip_summed = CHECKSUM_NONE;
3037 } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IPV6_CSUM)) {
3038 skb->ip_summed = CHECKSUM_PARTIAL;
3039 skb->csum_start = skb_transport_header(skb) - skb->head;
3040 skb->csum_offset = offsetof(struct udphdr, check);
3041 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0);
3042 } else {
3043 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), udplen, 0);
3044
3045 /* add protocol-dependent pseudo-header */
3046 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum);
3047
3048 if (udph->check == 0)
3049 udph->check = CSUM_MANGLED_0;
3050 }
3051
3052 return skb;
3053}
3054
3055static struct sk_buff *fill_packet(struct net_device *odev,
3056 struct pktgen_dev *pkt_dev)
3057{
3058 if (pkt_dev->flags & F_IPV6)
3059 return fill_packet_ipv6(odev, pkt_dev);
3060 else
3061 return fill_packet_ipv4(odev, pkt_dev);
3062}
3063
3064static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3065{
3066 pkt_dev->seq_num = 1;
3067 pkt_dev->idle_acc = 0;
3068 pkt_dev->sofar = 0;
3069 pkt_dev->tx_bytes = 0;
3070 pkt_dev->errors = 0;
3071}
3072
3073/* Set up structure for sending pkts, clear counters */
3074
3075static void pktgen_run(struct pktgen_thread *t)
3076{
3077 struct pktgen_dev *pkt_dev;
3078 int started = 0;
3079
3080 func_enter();
3081
3082 rcu_read_lock();
3083 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3084
3085 /*
3086 * setup odev and create initial packet.
3087 */
3088 pktgen_setup_inject(pkt_dev);
3089
3090 if (pkt_dev->odev) {
3091 pktgen_clear_counters(pkt_dev);
3092 pkt_dev->skb = NULL;
3093 pkt_dev->started_at = pkt_dev->next_tx = ktime_get();
3094
3095 set_pkt_overhead(pkt_dev);
3096
3097 strcpy(pkt_dev->result, "Starting");
3098 pkt_dev->running = 1; /* Cranke yeself! */
3099 started++;
3100 } else
3101 strcpy(pkt_dev->result, "Error starting");
3102 }
3103 rcu_read_unlock();
3104 if (started)
3105 t->control &= ~(T_STOP);
3106}
3107
3108static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn)
3109{
3110 struct pktgen_thread *t;
3111
3112 func_enter();
3113
3114 mutex_lock(&pktgen_thread_lock);
3115
3116 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3117 t->control |= T_STOP;
3118
3119 mutex_unlock(&pktgen_thread_lock);
3120}
3121
3122static int thread_is_running(const struct pktgen_thread *t)
3123{
3124 const struct pktgen_dev *pkt_dev;
3125
3126 rcu_read_lock();
3127 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
3128 if (pkt_dev->running) {
3129 rcu_read_unlock();
3130 return 1;
3131 }
3132 rcu_read_unlock();
3133 return 0;
3134}
3135
3136static int pktgen_wait_thread_run(struct pktgen_thread *t)
3137{
3138 while (thread_is_running(t)) {
3139
3140 msleep_interruptible(100);
3141
3142 if (signal_pending(current))
3143 goto signal;
3144 }
3145 return 1;
3146signal:
3147 return 0;
3148}
3149
3150static int pktgen_wait_all_threads_run(struct pktgen_net *pn)
3151{
3152 struct pktgen_thread *t;
3153 int sig = 1;
3154
3155 mutex_lock(&pktgen_thread_lock);
3156
3157 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
3158 sig = pktgen_wait_thread_run(t);
3159 if (sig == 0)
3160 break;
3161 }
3162
3163 if (sig == 0)
3164 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3165 t->control |= (T_STOP);
3166
3167 mutex_unlock(&pktgen_thread_lock);
3168 return sig;
3169}
3170
3171static void pktgen_run_all_threads(struct pktgen_net *pn)
3172{
3173 struct pktgen_thread *t;
3174
3175 func_enter();
3176
3177 mutex_lock(&pktgen_thread_lock);
3178
3179 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3180 t->control |= (T_RUN);
3181
3182 mutex_unlock(&pktgen_thread_lock);
3183
3184 /* Propagate thread->control */
3185 schedule_timeout_interruptible(msecs_to_jiffies(125));
3186
3187 pktgen_wait_all_threads_run(pn);
3188}
3189
3190static void pktgen_reset_all_threads(struct pktgen_net *pn)
3191{
3192 struct pktgen_thread *t;
3193
3194 func_enter();
3195
3196 mutex_lock(&pktgen_thread_lock);
3197
3198 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3199 t->control |= (T_REMDEVALL);
3200
3201 mutex_unlock(&pktgen_thread_lock);
3202
3203 /* Propagate thread->control */
3204 schedule_timeout_interruptible(msecs_to_jiffies(125));
3205
3206 pktgen_wait_all_threads_run(pn);
3207}
3208
3209static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3210{
3211 __u64 bps, mbps, pps;
3212 char *p = pkt_dev->result;
3213 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3214 pkt_dev->started_at);
3215 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3216
3217 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3218 (unsigned long long)ktime_to_us(elapsed),
3219 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3220 (unsigned long long)ktime_to_us(idle),
3221 (unsigned long long)pkt_dev->sofar,
3222 pkt_dev->cur_pkt_size, nr_frags);
3223
3224 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3225 ktime_to_ns(elapsed));
3226
3227 bps = pps * 8 * pkt_dev->cur_pkt_size;
3228
3229 mbps = bps;
3230 do_div(mbps, 1000000);
3231 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3232 (unsigned long long)pps,
3233 (unsigned long long)mbps,
3234 (unsigned long long)bps,
3235 (unsigned long long)pkt_dev->errors);
3236}
3237
3238/* Set stopped-at timer, remove from running list, do counters & statistics */
3239static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3240{
3241 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3242
3243 if (!pkt_dev->running) {
3244 pr_warn("interface: %s is already stopped\n",
3245 pkt_dev->odevname);
3246 return -EINVAL;
3247 }
3248
3249 pkt_dev->running = 0;
3250 kfree_skb(pkt_dev->skb);
3251 pkt_dev->skb = NULL;
3252 pkt_dev->stopped_at = ktime_get();
3253
3254 show_results(pkt_dev, nr_frags);
3255
3256 return 0;
3257}
3258
3259static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3260{
3261 struct pktgen_dev *pkt_dev, *best = NULL;
3262
3263 rcu_read_lock();
3264 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3265 if (!pkt_dev->running)
3266 continue;
3267 if (best == NULL)
3268 best = pkt_dev;
3269 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0)
3270 best = pkt_dev;
3271 }
3272 rcu_read_unlock();
3273
3274 return best;
3275}
3276
3277static void pktgen_stop(struct pktgen_thread *t)
3278{
3279 struct pktgen_dev *pkt_dev;
3280
3281 func_enter();
3282
3283 rcu_read_lock();
3284
3285 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3286 pktgen_stop_device(pkt_dev);
3287 }
3288
3289 rcu_read_unlock();
3290}
3291
3292/*
3293 * one of our devices needs to be removed - find it
3294 * and remove it
3295 */
3296static void pktgen_rem_one_if(struct pktgen_thread *t)
3297{
3298 struct list_head *q, *n;
3299 struct pktgen_dev *cur;
3300
3301 func_enter();
3302
3303 list_for_each_safe(q, n, &t->if_list) {
3304 cur = list_entry(q, struct pktgen_dev, list);
3305
3306 if (!cur->removal_mark)
3307 continue;
3308
3309 kfree_skb(cur->skb);
3310 cur->skb = NULL;
3311
3312 pktgen_remove_device(t, cur);
3313
3314 break;
3315 }
3316}
3317
3318static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3319{
3320 struct list_head *q, *n;
3321 struct pktgen_dev *cur;
3322
3323 func_enter();
3324
3325 /* Remove all devices, free mem */
3326
3327 list_for_each_safe(q, n, &t->if_list) {
3328 cur = list_entry(q, struct pktgen_dev, list);
3329
3330 kfree_skb(cur->skb);
3331 cur->skb = NULL;
3332
3333 pktgen_remove_device(t, cur);
3334 }
3335}
3336
3337static void pktgen_rem_thread(struct pktgen_thread *t)
3338{
3339 /* Remove from the thread list */
3340 remove_proc_entry(t->tsk->comm, t->net->proc_dir);
3341}
3342
3343static void pktgen_resched(struct pktgen_dev *pkt_dev)
3344{
3345 ktime_t idle_start = ktime_get();
3346 schedule();
3347 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3348}
3349
3350static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3351{
3352 ktime_t idle_start = ktime_get();
3353
3354 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3355 if (signal_pending(current))
3356 break;
3357
3358 if (need_resched())
3359 pktgen_resched(pkt_dev);
3360 else
3361 cpu_relax();
3362 }
3363 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3364}
3365
3366static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3367{
3368 unsigned int burst = ACCESS_ONCE(pkt_dev->burst);
3369 struct net_device *odev = pkt_dev->odev;
3370 struct netdev_queue *txq;
3371 struct sk_buff *skb;
3372 int ret;
3373
3374 /* If device is offline, then don't send */
3375 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3376 pktgen_stop_device(pkt_dev);
3377 return;
3378 }
3379
3380 /* This is max DELAY, this has special meaning of
3381 * "never transmit"
3382 */
3383 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3384 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
3385 return;
3386 }
3387
3388 /* If no skb or clone count exhausted then get new one */
3389 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3390 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3391 /* build a new pkt */
3392 kfree_skb(pkt_dev->skb);
3393
3394 pkt_dev->skb = fill_packet(odev, pkt_dev);
3395 if (pkt_dev->skb == NULL) {
3396 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3397 schedule();
3398 pkt_dev->clone_count--; /* back out increment, OOM */
3399 return;
3400 }
3401 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3402 pkt_dev->clone_count = 0; /* reset counter */
3403 }
3404
3405 if (pkt_dev->delay && pkt_dev->last_ok)
3406 spin(pkt_dev, pkt_dev->next_tx);
3407
3408 if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) {
3409 skb = pkt_dev->skb;
3410 skb->protocol = eth_type_trans(skb, skb->dev);
3411 atomic_add(burst, &skb->users);
3412 local_bh_disable();
3413 do {
3414 ret = netif_receive_skb(skb);
3415 if (ret == NET_RX_DROP)
3416 pkt_dev->errors++;
3417 pkt_dev->sofar++;
3418 pkt_dev->seq_num++;
3419 if (atomic_read(&skb->users) != burst) {
3420 /* skb was queued by rps/rfs or taps,
3421 * so cannot reuse this skb
3422 */
3423 atomic_sub(burst - 1, &skb->users);
3424 /* get out of the loop and wait
3425 * until skb is consumed
3426 */
3427 break;
3428 }
3429 /* skb was 'freed' by stack, so clean few
3430 * bits and reuse it
3431 */
3432#ifdef CONFIG_NET_CLS_ACT
3433 skb->tc_verd = 0; /* reset reclass/redir ttl */
3434#endif
3435 } while (--burst > 0);
3436 goto out; /* Skips xmit_mode M_START_XMIT */
3437 }
3438
3439 txq = skb_get_tx_queue(odev, pkt_dev->skb);
3440
3441 local_bh_disable();
3442
3443 HARD_TX_LOCK(odev, txq, smp_processor_id());
3444
3445 if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) {
3446 ret = NETDEV_TX_BUSY;
3447 pkt_dev->last_ok = 0;
3448 goto unlock;
3449 }
3450 atomic_add(burst, &pkt_dev->skb->users);
3451
3452xmit_more:
3453 ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0);
3454
3455 switch (ret) {
3456 case NETDEV_TX_OK:
3457 pkt_dev->last_ok = 1;
3458 pkt_dev->sofar++;
3459 pkt_dev->seq_num++;
3460 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3461 if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq))
3462 goto xmit_more;
3463 break;
3464 case NET_XMIT_DROP:
3465 case NET_XMIT_CN:
3466 case NET_XMIT_POLICED:
3467 /* skb has been consumed */
3468 pkt_dev->errors++;
3469 break;
3470 default: /* Drivers are not supposed to return other values! */
3471 net_info_ratelimited("%s xmit error: %d\n",
3472 pkt_dev->odevname, ret);
3473 pkt_dev->errors++;
3474 /* fallthru */
3475 case NETDEV_TX_LOCKED:
3476 case NETDEV_TX_BUSY:
3477 /* Retry it next time */
3478 atomic_dec(&(pkt_dev->skb->users));
3479 pkt_dev->last_ok = 0;
3480 }
3481 if (unlikely(burst))
3482 atomic_sub(burst, &pkt_dev->skb->users);
3483unlock:
3484 HARD_TX_UNLOCK(odev, txq);
3485
3486out:
3487 local_bh_enable();
3488
3489 /* If pkt_dev->count is zero, then run forever */
3490 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3491 pktgen_wait_for_skb(pkt_dev);
3492
3493 /* Done with this */
3494 pktgen_stop_device(pkt_dev);
3495 }
3496}
3497
3498/*
3499 * Main loop of the thread goes here
3500 */
3501
3502static int pktgen_thread_worker(void *arg)
3503{
3504 DEFINE_WAIT(wait);
3505 struct pktgen_thread *t = arg;
3506 struct pktgen_dev *pkt_dev = NULL;
3507 int cpu = t->cpu;
3508
3509 BUG_ON(smp_processor_id() != cpu);
3510
3511 init_waitqueue_head(&t->queue);
3512 complete(&t->start_done);
3513
3514 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3515
3516 set_freezable();
3517
3518 while (!kthread_should_stop()) {
3519 pkt_dev = next_to_run(t);
3520
3521 if (unlikely(!pkt_dev && t->control == 0)) {
3522 if (t->net->pktgen_exiting)
3523 break;
3524 wait_event_interruptible_timeout(t->queue,
3525 t->control != 0,
3526 HZ/10);
3527 try_to_freeze();
3528 continue;
3529 }
3530
3531 if (likely(pkt_dev)) {
3532 pktgen_xmit(pkt_dev);
3533
3534 if (need_resched())
3535 pktgen_resched(pkt_dev);
3536 else
3537 cpu_relax();
3538 }
3539
3540 if (t->control & T_STOP) {
3541 pktgen_stop(t);
3542 t->control &= ~(T_STOP);
3543 }
3544
3545 if (t->control & T_RUN) {
3546 pktgen_run(t);
3547 t->control &= ~(T_RUN);
3548 }
3549
3550 if (t->control & T_REMDEVALL) {
3551 pktgen_rem_all_ifs(t);
3552 t->control &= ~(T_REMDEVALL);
3553 }
3554
3555 if (t->control & T_REMDEV) {
3556 pktgen_rem_one_if(t);
3557 t->control &= ~(T_REMDEV);
3558 }
3559
3560 try_to_freeze();
3561 }
3562
3563 pr_debug("%s stopping all device\n", t->tsk->comm);
3564 pktgen_stop(t);
3565
3566 pr_debug("%s removing all device\n", t->tsk->comm);
3567 pktgen_rem_all_ifs(t);
3568
3569 pr_debug("%s removing thread\n", t->tsk->comm);
3570 pktgen_rem_thread(t);
3571
3572 return 0;
3573}
3574
3575static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3576 const char *ifname, bool exact)
3577{
3578 struct pktgen_dev *p, *pkt_dev = NULL;
3579 size_t len = strlen(ifname);
3580
3581 rcu_read_lock();
3582 list_for_each_entry_rcu(p, &t->if_list, list)
3583 if (strncmp(p->odevname, ifname, len) == 0) {
3584 if (p->odevname[len]) {
3585 if (exact || p->odevname[len] != '@')
3586 continue;
3587 }
3588 pkt_dev = p;
3589 break;
3590 }
3591
3592 rcu_read_unlock();
3593 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3594 return pkt_dev;
3595}
3596
3597/*
3598 * Adds a dev at front of if_list.
3599 */
3600
3601static int add_dev_to_thread(struct pktgen_thread *t,
3602 struct pktgen_dev *pkt_dev)
3603{
3604 int rv = 0;
3605
3606 /* This function cannot be called concurrently, as its called
3607 * under pktgen_thread_lock mutex, but it can run from
3608 * userspace on another CPU than the kthread. The if_lock()
3609 * is used here to sync with concurrent instances of
3610 * _rem_dev_from_if_list() invoked via kthread, which is also
3611 * updating the if_list */
3612 if_lock(t);
3613
3614 if (pkt_dev->pg_thread) {
3615 pr_err("ERROR: already assigned to a thread\n");
3616 rv = -EBUSY;
3617 goto out;
3618 }
3619
3620 pkt_dev->running = 0;
3621 pkt_dev->pg_thread = t;
3622 list_add_rcu(&pkt_dev->list, &t->if_list);
3623
3624out:
3625 if_unlock(t);
3626 return rv;
3627}
3628
3629/* Called under thread lock */
3630
3631static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3632{
3633 struct pktgen_dev *pkt_dev;
3634 int err;
3635 int node = cpu_to_node(t->cpu);
3636
3637 /* We don't allow a device to be on several threads */
3638
3639 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND);
3640 if (pkt_dev) {
3641 pr_err("ERROR: interface already used\n");
3642 return -EBUSY;
3643 }
3644
3645 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3646 if (!pkt_dev)
3647 return -ENOMEM;
3648
3649 strcpy(pkt_dev->odevname, ifname);
3650 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3651 node);
3652 if (pkt_dev->flows == NULL) {
3653 kfree(pkt_dev);
3654 return -ENOMEM;
3655 }
3656
3657 pkt_dev->removal_mark = 0;
3658 pkt_dev->nfrags = 0;
3659 pkt_dev->delay = pg_delay_d;
3660 pkt_dev->count = pg_count_d;
3661 pkt_dev->sofar = 0;
3662 pkt_dev->udp_src_min = 9; /* sink port */
3663 pkt_dev->udp_src_max = 9;
3664 pkt_dev->udp_dst_min = 9;
3665 pkt_dev->udp_dst_max = 9;
3666 pkt_dev->vlan_p = 0;
3667 pkt_dev->vlan_cfi = 0;
3668 pkt_dev->vlan_id = 0xffff;
3669 pkt_dev->svlan_p = 0;
3670 pkt_dev->svlan_cfi = 0;
3671 pkt_dev->svlan_id = 0xffff;
3672 pkt_dev->burst = 1;
3673 pkt_dev->node = -1;
3674
3675 err = pktgen_setup_dev(t->net, pkt_dev, ifname);
3676 if (err)
3677 goto out1;
3678 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3679 pkt_dev->clone_skb = pg_clone_skb_d;
3680
3681 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir,
3682 &pktgen_if_fops, pkt_dev);
3683 if (!pkt_dev->entry) {
3684 pr_err("cannot create %s/%s procfs entry\n",
3685 PG_PROC_DIR, ifname);
3686 err = -EINVAL;
3687 goto out2;
3688 }
3689#ifdef CONFIG_XFRM
3690 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3691 pkt_dev->ipsproto = IPPROTO_ESP;
3692
3693 /* xfrm tunnel mode needs additional dst to extract outter
3694 * ip header protocol/ttl/id field, here creat a phony one.
3695 * instead of looking for a valid rt, which definitely hurting
3696 * performance under such circumstance.
3697 */
3698 pkt_dev->dstops.family = AF_INET;
3699 pkt_dev->dst.dev = pkt_dev->odev;
3700 dst_init_metrics(&pkt_dev->dst, pktgen_dst_metrics, false);
3701 pkt_dev->dst.child = &pkt_dev->dst;
3702 pkt_dev->dst.ops = &pkt_dev->dstops;
3703#endif
3704
3705 return add_dev_to_thread(t, pkt_dev);
3706out2:
3707 dev_put(pkt_dev->odev);
3708out1:
3709#ifdef CONFIG_XFRM
3710 free_SAs(pkt_dev);
3711#endif
3712 vfree(pkt_dev->flows);
3713 kfree(pkt_dev);
3714 return err;
3715}
3716
3717static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
3718{
3719 struct pktgen_thread *t;
3720 struct proc_dir_entry *pe;
3721 struct task_struct *p;
3722
3723 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3724 cpu_to_node(cpu));
3725 if (!t) {
3726 pr_err("ERROR: out of memory, can't create new thread\n");
3727 return -ENOMEM;
3728 }
3729
3730 spin_lock_init(&t->if_lock);
3731 t->cpu = cpu;
3732
3733 INIT_LIST_HEAD(&t->if_list);
3734
3735 list_add_tail(&t->th_list, &pn->pktgen_threads);
3736 init_completion(&t->start_done);
3737
3738 p = kthread_create_on_node(pktgen_thread_worker,
3739 t,
3740 cpu_to_node(cpu),
3741 "kpktgend_%d", cpu);
3742 if (IS_ERR(p)) {
3743 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3744 list_del(&t->th_list);
3745 kfree(t);
3746 return PTR_ERR(p);
3747 }
3748 kthread_bind(p, cpu);
3749 t->tsk = p;
3750
3751 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
3752 &pktgen_thread_fops, t);
3753 if (!pe) {
3754 pr_err("cannot create %s/%s procfs entry\n",
3755 PG_PROC_DIR, t->tsk->comm);
3756 kthread_stop(p);
3757 list_del(&t->th_list);
3758 kfree(t);
3759 return -EINVAL;
3760 }
3761
3762 t->net = pn;
3763 get_task_struct(p);
3764 wake_up_process(p);
3765 wait_for_completion(&t->start_done);
3766
3767 return 0;
3768}
3769
3770/*
3771 * Removes a device from the thread if_list.
3772 */
3773static void _rem_dev_from_if_list(struct pktgen_thread *t,
3774 struct pktgen_dev *pkt_dev)
3775{
3776 struct list_head *q, *n;
3777 struct pktgen_dev *p;
3778
3779 if_lock(t);
3780 list_for_each_safe(q, n, &t->if_list) {
3781 p = list_entry(q, struct pktgen_dev, list);
3782 if (p == pkt_dev)
3783 list_del_rcu(&p->list);
3784 }
3785 if_unlock(t);
3786}
3787
3788static int pktgen_remove_device(struct pktgen_thread *t,
3789 struct pktgen_dev *pkt_dev)
3790{
3791 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3792
3793 if (pkt_dev->running) {
3794 pr_warn("WARNING: trying to remove a running interface, stopping it now\n");
3795 pktgen_stop_device(pkt_dev);
3796 }
3797
3798 /* Dis-associate from the interface */
3799
3800 if (pkt_dev->odev) {
3801 dev_put(pkt_dev->odev);
3802 pkt_dev->odev = NULL;
3803 }
3804
3805 /* Remove proc before if_list entry, because add_device uses
3806 * list to determine if interface already exist, avoid race
3807 * with proc_create_data() */
3808 proc_remove(pkt_dev->entry);
3809
3810 /* And update the thread if_list */
3811 _rem_dev_from_if_list(t, pkt_dev);
3812
3813#ifdef CONFIG_XFRM
3814 free_SAs(pkt_dev);
3815#endif
3816 vfree(pkt_dev->flows);
3817 if (pkt_dev->page)
3818 put_page(pkt_dev->page);
3819 kfree_rcu(pkt_dev, rcu);
3820 return 0;
3821}
3822
3823static int __net_init pg_net_init(struct net *net)
3824{
3825 struct pktgen_net *pn = net_generic(net, pg_net_id);
3826 struct proc_dir_entry *pe;
3827 int cpu, ret = 0;
3828
3829 pn->net = net;
3830 INIT_LIST_HEAD(&pn->pktgen_threads);
3831 pn->pktgen_exiting = false;
3832 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net);
3833 if (!pn->proc_dir) {
3834 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR);
3835 return -ENODEV;
3836 }
3837 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops);
3838 if (pe == NULL) {
3839 pr_err("cannot create %s procfs entry\n", PGCTRL);
3840 ret = -EINVAL;
3841 goto remove;
3842 }
3843
3844 for_each_online_cpu(cpu) {
3845 int err;
3846
3847 err = pktgen_create_thread(cpu, pn);
3848 if (err)
3849 pr_warn("Cannot create thread for cpu %d (%d)\n",
3850 cpu, err);
3851 }
3852
3853 if (list_empty(&pn->pktgen_threads)) {
3854 pr_err("Initialization failed for all threads\n");
3855 ret = -ENODEV;
3856 goto remove_entry;
3857 }
3858
3859 return 0;
3860
3861remove_entry:
3862 remove_proc_entry(PGCTRL, pn->proc_dir);
3863remove:
3864 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3865 return ret;
3866}
3867
3868static void __net_exit pg_net_exit(struct net *net)
3869{
3870 struct pktgen_net *pn = net_generic(net, pg_net_id);
3871 struct pktgen_thread *t;
3872 struct list_head *q, *n;
3873 LIST_HEAD(list);
3874
3875 /* Stop all interfaces & threads */
3876 pn->pktgen_exiting = true;
3877
3878 mutex_lock(&pktgen_thread_lock);
3879 list_splice_init(&pn->pktgen_threads, &list);
3880 mutex_unlock(&pktgen_thread_lock);
3881
3882 list_for_each_safe(q, n, &list) {
3883 t = list_entry(q, struct pktgen_thread, th_list);
3884 list_del(&t->th_list);
3885 kthread_stop(t->tsk);
3886 put_task_struct(t->tsk);
3887 kfree(t);
3888 }
3889
3890 remove_proc_entry(PGCTRL, pn->proc_dir);
3891 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3892}
3893
3894static struct pernet_operations pg_net_ops = {
3895 .init = pg_net_init,
3896 .exit = pg_net_exit,
3897 .id = &pg_net_id,
3898 .size = sizeof(struct pktgen_net),
3899};
3900
3901static int __init pg_init(void)
3902{
3903 int ret = 0;
3904
3905 pr_info("%s", version);
3906 ret = register_pernet_subsys(&pg_net_ops);
3907 if (ret)
3908 return ret;
3909 ret = register_netdevice_notifier(&pktgen_notifier_block);
3910 if (ret)
3911 unregister_pernet_subsys(&pg_net_ops);
3912
3913 return ret;
3914}
3915
3916static void __exit pg_cleanup(void)
3917{
3918 unregister_netdevice_notifier(&pktgen_notifier_block);
3919 unregister_pernet_subsys(&pg_net_ops);
3920 /* Don't need rcu_barrier() due to use of kfree_rcu() */
3921}
3922
3923module_init(pg_init);
3924module_exit(pg_cleanup);
3925
3926MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3927MODULE_DESCRIPTION("Packet Generator tool");
3928MODULE_LICENSE("GPL");
3929MODULE_VERSION(VERSION);
3930module_param(pg_count_d, int, 0);
3931MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3932module_param(pg_delay_d, int, 0);
3933MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3934module_param(pg_clone_skb_d, int, 0);
3935MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3936module_param(debug, int, 0);
3937MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");