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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 */
115 #include <linux/sys.h>
116 #include <linux/types.h>
117 #include <linux/module.h>
118 #include <linux/moduleparam.h>
119 #include <linux/kernel.h>
120 #include <linux/smp_lock.h>
121 #include <linux/mutex.h>
122 #include <linux/sched.h>
123 #include <linux/slab.h>
124 #include <linux/vmalloc.h>
125 #include <linux/unistd.h>
126 #include <linux/string.h>
127 #include <linux/ptrace.h>
128 #include <linux/errno.h>
129 #include <linux/ioport.h>
130 #include <linux/interrupt.h>
131 #include <linux/capability.h>
132 #include <linux/delay.h>
133 #include <linux/timer.h>
134 #include <linux/list.h>
135 #include <linux/init.h>
136 #include <linux/skbuff.h>
137 #include <linux/netdevice.h>
138 #include <linux/inet.h>
139 #include <linux/inetdevice.h>
140 #include <linux/rtnetlink.h>
141 #include <linux/if_arp.h>
142 #include <linux/if_vlan.h>
143 #include <linux/in.h>
144 #include <linux/ip.h>
145 #include <linux/ipv6.h>
146 #include <linux/udp.h>
147 #include <linux/proc_fs.h>
148 #include <linux/seq_file.h>
149 #include <linux/wait.h>
150 #include <linux/etherdevice.h>
151 #include <net/checksum.h>
152 #include <net/ipv6.h>
153 #include <net/addrconf.h>
154 #include <asm/byteorder.h>
155 #include <linux/rcupdate.h>
156 #include <asm/bitops.h>
157 #include <asm/io.h>
158 #include <asm/dma.h>
159 #include <asm/uaccess.h>
160 #include <asm/div64.h> /* do_div */
161 #include <asm/timex.h>
162
163 #define VERSION "pktgen v2.68: Packet Generator for packet performance testing.\n"
164
165 /* #define PG_DEBUG(a) a */
166 #define PG_DEBUG(a)
167
168 /* The buckets are exponential in 'width' */
169 #define LAT_BUCKETS_MAX 32
170 #define IP_NAME_SZ 32
171 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
172 #define MPLS_STACK_BOTTOM __constant_htonl(0x00000100)
173
174 /* Device flag bits */
175 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
176 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
177 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
178 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
179 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
180 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
181 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
182 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
183 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
184 #define F_VID_RND (1<<9) /* Random VLAN ID */
185 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
186
187 /* Thread control flag bits */
188 #define T_TERMINATE (1<<0)
189 #define T_STOP (1<<1) /* Stop run */
190 #define T_RUN (1<<2) /* Start run */
191 #define T_REMDEVALL (1<<3) /* Remove all devs */
192 #define T_REMDEV (1<<4) /* Remove one dev */
193
194 /* If lock -- can be removed after some work */
195 #define if_lock(t) spin_lock(&(t->if_lock));
196 #define if_unlock(t) spin_unlock(&(t->if_lock));
197
198 /* Used to help with determining the pkts on receive */
199 #define PKTGEN_MAGIC 0xbe9be955
200 #define PG_PROC_DIR "pktgen"
201 #define PGCTRL "pgctrl"
202 static struct proc_dir_entry *pg_proc_dir = NULL;
203
204 #define MAX_CFLOWS 65536
205
206 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
207 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
208
209 struct flow_state {
210 __be32 cur_daddr;
211 int count;
212 };
213
214 struct pktgen_dev {
215
216 /*
217 * Try to keep frequent/infrequent used vars. separated.
218 */
219
220 char ifname[IFNAMSIZ];
221 char result[512];
222
223 struct pktgen_thread *pg_thread; /* the owner */
224 struct list_head list; /* Used for chaining in the thread's run-queue */
225
226 int running; /* if this changes to false, the test will stop */
227
228 /* If min != max, then we will either do a linear iteration, or
229 * we will do a random selection from within the range.
230 */
231 __u32 flags;
232 int removal_mark; /* non-zero => the device is marked for
233 * removal by worker thread */
234
235 int min_pkt_size; /* = ETH_ZLEN; */
236 int max_pkt_size; /* = ETH_ZLEN; */
237 int nfrags;
238 __u32 delay_us; /* Default delay */
239 __u32 delay_ns;
240 __u64 count; /* Default No packets to send */
241 __u64 sofar; /* How many pkts we've sent so far */
242 __u64 tx_bytes; /* How many bytes we've transmitted */
243 __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */
244
245 /* runtime counters relating to clone_skb */
246 __u64 next_tx_us; /* timestamp of when to tx next */
247 __u32 next_tx_ns;
248
249 __u64 allocated_skbs;
250 __u32 clone_count;
251 int last_ok; /* Was last skb sent?
252 * Or a failed transmit of some sort? This will keep
253 * sequence numbers in order, for example.
254 */
255 __u64 started_at; /* micro-seconds */
256 __u64 stopped_at; /* micro-seconds */
257 __u64 idle_acc; /* micro-seconds */
258 __u32 seq_num;
259
260 int clone_skb; /* Use multiple SKBs during packet gen. If this number
261 * is greater than 1, then that many copies of the same
262 * packet will be sent before a new packet is allocated.
263 * For instance, if you want to send 1024 identical packets
264 * before creating a new packet, set clone_skb to 1024.
265 */
266
267 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
268 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
269 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
270 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
271
272 struct in6_addr in6_saddr;
273 struct in6_addr in6_daddr;
274 struct in6_addr cur_in6_daddr;
275 struct in6_addr cur_in6_saddr;
276 /* For ranges */
277 struct in6_addr min_in6_daddr;
278 struct in6_addr max_in6_daddr;
279 struct in6_addr min_in6_saddr;
280 struct in6_addr max_in6_saddr;
281
282 /* If we're doing ranges, random or incremental, then this
283 * defines the min/max for those ranges.
284 */
285 __be32 saddr_min; /* inclusive, source IP address */
286 __be32 saddr_max; /* exclusive, source IP address */
287 __be32 daddr_min; /* inclusive, dest IP address */
288 __be32 daddr_max; /* exclusive, dest IP address */
289
290 __u16 udp_src_min; /* inclusive, source UDP port */
291 __u16 udp_src_max; /* exclusive, source UDP port */
292 __u16 udp_dst_min; /* inclusive, dest UDP port */
293 __u16 udp_dst_max; /* exclusive, dest UDP port */
294
295 /* DSCP + ECN */
296 __u8 tos; /* six most significant bits of (former) IPv4 TOS are for dscp codepoint */
297 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 (see RFC 3260, sec. 4) */
298
299 /* MPLS */
300 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
301 __be32 labels[MAX_MPLS_LABELS];
302
303 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
304 __u8 vlan_p;
305 __u8 vlan_cfi;
306 __u16 vlan_id; /* 0xffff means no vlan tag */
307
308 __u8 svlan_p;
309 __u8 svlan_cfi;
310 __u16 svlan_id; /* 0xffff means no svlan tag */
311
312 __u32 src_mac_count; /* How many MACs to iterate through */
313 __u32 dst_mac_count; /* How many MACs to iterate through */
314
315 unsigned char dst_mac[ETH_ALEN];
316 unsigned char src_mac[ETH_ALEN];
317
318 __u32 cur_dst_mac_offset;
319 __u32 cur_src_mac_offset;
320 __be32 cur_saddr;
321 __be32 cur_daddr;
322 __u16 cur_udp_dst;
323 __u16 cur_udp_src;
324 __u32 cur_pkt_size;
325
326 __u8 hh[14];
327 /* = {
328 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
329
330 We fill in SRC address later
331 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
332 0x08, 0x00
333 };
334 */
335 __u16 pad; /* pad out the hh struct to an even 16 bytes */
336
337 struct sk_buff *skb; /* skb we are to transmit next, mainly used for when we
338 * are transmitting the same one multiple times
339 */
340 struct net_device *odev; /* The out-going device. Note that the device should
341 * have it's pg_info pointer pointing back to this
342 * device. This will be set when the user specifies
343 * the out-going device name (not when the inject is
344 * started as it used to do.)
345 */
346 struct flow_state *flows;
347 unsigned cflows; /* Concurrent flows (config) */
348 unsigned lflow; /* Flow length (config) */
349 unsigned nflows; /* accumulated flows (stats) */
350 };
351
352 struct pktgen_hdr {
353 __be32 pgh_magic;
354 __be32 seq_num;
355 __be32 tv_sec;
356 __be32 tv_usec;
357 };
358
359 struct pktgen_thread {
360 spinlock_t if_lock;
361 struct list_head if_list; /* All device here */
362 struct list_head th_list;
363 int removed;
364 char name[32];
365 char result[512];
366 u32 max_before_softirq; /* We'll call do_softirq to prevent starvation. */
367
368 /* Field for thread to receive "posted" events terminate, stop ifs etc. */
369
370 u32 control;
371 int pid;
372 int cpu;
373
374 wait_queue_head_t queue;
375 };
376
377 #define REMOVE 1
378 #define FIND 0
379
380 /* This code works around the fact that do_div cannot handle two 64-bit
381 numbers, and regular 64-bit division doesn't work on x86 kernels.
382 --Ben
383 */
384
385 #define PG_DIV 0
386
387 /* This was emailed to LMKL by: Chris Caputo <ccaputo@alt.net>
388 * Function copied/adapted/optimized from:
389 *
390 * nemesis.sourceforge.net/browse/lib/static/intmath/ix86/intmath.c.html
391 *
392 * Copyright 1994, University of Cambridge Computer Laboratory
393 * All Rights Reserved.
394 *
395 */
396 static inline s64 divremdi3(s64 x, s64 y, int type)
397 {
398 u64 a = (x < 0) ? -x : x;
399 u64 b = (y < 0) ? -y : y;
400 u64 res = 0, d = 1;
401
402 if (b > 0) {
403 while (b < a) {
404 b <<= 1;
405 d <<= 1;
406 }
407 }
408
409 do {
410 if (a >= b) {
411 a -= b;
412 res += d;
413 }
414 b >>= 1;
415 d >>= 1;
416 }
417 while (d);
418
419 if (PG_DIV == type) {
420 return (((x ^ y) & (1ll << 63)) == 0) ? res : -(s64) res;
421 } else {
422 return ((x & (1ll << 63)) == 0) ? a : -(s64) a;
423 }
424 }
425
426 /* End of hacks to deal with 64-bit math on x86 */
427
428 /** Convert to milliseconds */
429 static inline __u64 tv_to_ms(const struct timeval *tv)
430 {
431 __u64 ms = tv->tv_usec / 1000;
432 ms += (__u64) tv->tv_sec * (__u64) 1000;
433 return ms;
434 }
435
436 /** Convert to micro-seconds */
437 static inline __u64 tv_to_us(const struct timeval *tv)
438 {
439 __u64 us = tv->tv_usec;
440 us += (__u64) tv->tv_sec * (__u64) 1000000;
441 return us;
442 }
443
444 static inline __u64 pg_div(__u64 n, __u32 base)
445 {
446 __u64 tmp = n;
447 do_div(tmp, base);
448 /* printk("pktgen: pg_div, n: %llu base: %d rv: %llu\n",
449 n, base, tmp); */
450 return tmp;
451 }
452
453 static inline __u64 pg_div64(__u64 n, __u64 base)
454 {
455 __u64 tmp = n;
456 /*
457 * How do we know if the architecture we are running on
458 * supports division with 64 bit base?
459 *
460 */
461 #if defined(__sparc_v9__) || defined(__powerpc64__) || defined(__alpha__) || defined(__x86_64__) || defined(__ia64__)
462
463 do_div(tmp, base);
464 #else
465 tmp = divremdi3(n, base, PG_DIV);
466 #endif
467 return tmp;
468 }
469
470 static inline u32 pktgen_random(void)
471 {
472 #if 0
473 __u32 n;
474 get_random_bytes(&n, 4);
475 return n;
476 #else
477 return net_random();
478 #endif
479 }
480
481 static inline __u64 getCurMs(void)
482 {
483 struct timeval tv;
484 do_gettimeofday(&tv);
485 return tv_to_ms(&tv);
486 }
487
488 static inline __u64 getCurUs(void)
489 {
490 struct timeval tv;
491 do_gettimeofday(&tv);
492 return tv_to_us(&tv);
493 }
494
495 static inline __u64 tv_diff(const struct timeval *a, const struct timeval *b)
496 {
497 return tv_to_us(a) - tv_to_us(b);
498 }
499
500 /* old include end */
501
502 static char version[] __initdata = VERSION;
503
504 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
505 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
506 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
507 const char *ifname);
508 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
509 static void pktgen_run_all_threads(void);
510 static void pktgen_stop_all_threads_ifs(void);
511 static int pktgen_stop_device(struct pktgen_dev *pkt_dev);
512 static void pktgen_stop(struct pktgen_thread *t);
513 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
514 static int pktgen_mark_device(const char *ifname);
515 static unsigned int scan_ip6(const char *s, char ip[16]);
516 static unsigned int fmt_ip6(char *s, const char ip[16]);
517
518 /* Module parameters, defaults. */
519 static int pg_count_d = 1000; /* 1000 pkts by default */
520 static int pg_delay_d;
521 static int pg_clone_skb_d;
522 static int debug;
523
524 static DEFINE_MUTEX(pktgen_thread_lock);
525 static LIST_HEAD(pktgen_threads);
526
527 static struct notifier_block pktgen_notifier_block = {
528 .notifier_call = pktgen_device_event,
529 };
530
531 /*
532 * /proc handling functions
533 *
534 */
535
536 static int pgctrl_show(struct seq_file *seq, void *v)
537 {
538 seq_puts(seq, VERSION);
539 return 0;
540 }
541
542 static ssize_t pgctrl_write(struct file *file, const char __user * buf,
543 size_t count, loff_t * ppos)
544 {
545 int err = 0;
546 char data[128];
547
548 if (!capable(CAP_NET_ADMIN)) {
549 err = -EPERM;
550 goto out;
551 }
552
553 if (count > sizeof(data))
554 count = sizeof(data);
555
556 if (copy_from_user(data, buf, count)) {
557 err = -EFAULT;
558 goto out;
559 }
560 data[count - 1] = 0; /* Make string */
561
562 if (!strcmp(data, "stop"))
563 pktgen_stop_all_threads_ifs();
564
565 else if (!strcmp(data, "start"))
566 pktgen_run_all_threads();
567
568 else
569 printk("pktgen: Unknown command: %s\n", data);
570
571 err = count;
572
573 out:
574 return err;
575 }
576
577 static int pgctrl_open(struct inode *inode, struct file *file)
578 {
579 return single_open(file, pgctrl_show, PDE(inode)->data);
580 }
581
582 static struct file_operations pktgen_fops = {
583 .owner = THIS_MODULE,
584 .open = pgctrl_open,
585 .read = seq_read,
586 .llseek = seq_lseek,
587 .write = pgctrl_write,
588 .release = single_release,
589 };
590
591 static int pktgen_if_show(struct seq_file *seq, void *v)
592 {
593 int i;
594 struct pktgen_dev *pkt_dev = seq->private;
595 __u64 sa;
596 __u64 stopped;
597 __u64 now = getCurUs();
598
599 seq_printf(seq,
600 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
601 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
602 pkt_dev->max_pkt_size);
603
604 seq_printf(seq,
605 " frags: %d delay: %u clone_skb: %d ifname: %s\n",
606 pkt_dev->nfrags,
607 1000 * pkt_dev->delay_us + pkt_dev->delay_ns,
608 pkt_dev->clone_skb, pkt_dev->ifname);
609
610 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
611 pkt_dev->lflow);
612
613 if (pkt_dev->flags & F_IPV6) {
614 char b1[128], b2[128], b3[128];
615 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
616 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
617 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
618 seq_printf(seq,
619 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
620 b2, b3);
621
622 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
623 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
624 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
625 seq_printf(seq,
626 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
627 b2, b3);
628
629 } else
630 seq_printf(seq,
631 " dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n",
632 pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min,
633 pkt_dev->src_max);
634
635 seq_puts(seq, " src_mac: ");
636
637 if (is_zero_ether_addr(pkt_dev->src_mac))
638 for (i = 0; i < 6; i++)
639 seq_printf(seq, "%02X%s", pkt_dev->odev->dev_addr[i],
640 i == 5 ? " " : ":");
641 else
642 for (i = 0; i < 6; i++)
643 seq_printf(seq, "%02X%s", pkt_dev->src_mac[i],
644 i == 5 ? " " : ":");
645
646 seq_printf(seq, "dst_mac: ");
647 for (i = 0; i < 6; i++)
648 seq_printf(seq, "%02X%s", pkt_dev->dst_mac[i],
649 i == 5 ? "\n" : ":");
650
651 seq_printf(seq,
652 " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n",
653 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
654 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
655
656 seq_printf(seq,
657 " src_mac_count: %d dst_mac_count: %d\n",
658 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
659
660 if (pkt_dev->nr_labels) {
661 unsigned i;
662 seq_printf(seq, " mpls: ");
663 for(i = 0; i < pkt_dev->nr_labels; i++)
664 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
665 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
666 }
667
668 if (pkt_dev->vlan_id != 0xffff) {
669 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
670 pkt_dev->vlan_id, pkt_dev->vlan_p, pkt_dev->vlan_cfi);
671 }
672
673 if (pkt_dev->svlan_id != 0xffff) {
674 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
675 pkt_dev->svlan_id, pkt_dev->svlan_p, pkt_dev->svlan_cfi);
676 }
677
678 if (pkt_dev->tos) {
679 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
680 }
681
682 if (pkt_dev->traffic_class) {
683 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
684 }
685
686 seq_printf(seq, " Flags: ");
687
688 if (pkt_dev->flags & F_IPV6)
689 seq_printf(seq, "IPV6 ");
690
691 if (pkt_dev->flags & F_IPSRC_RND)
692 seq_printf(seq, "IPSRC_RND ");
693
694 if (pkt_dev->flags & F_IPDST_RND)
695 seq_printf(seq, "IPDST_RND ");
696
697 if (pkt_dev->flags & F_TXSIZE_RND)
698 seq_printf(seq, "TXSIZE_RND ");
699
700 if (pkt_dev->flags & F_UDPSRC_RND)
701 seq_printf(seq, "UDPSRC_RND ");
702
703 if (pkt_dev->flags & F_UDPDST_RND)
704 seq_printf(seq, "UDPDST_RND ");
705
706 if (pkt_dev->flags & F_MPLS_RND)
707 seq_printf(seq, "MPLS_RND ");
708
709 if (pkt_dev->flags & F_MACSRC_RND)
710 seq_printf(seq, "MACSRC_RND ");
711
712 if (pkt_dev->flags & F_MACDST_RND)
713 seq_printf(seq, "MACDST_RND ");
714
715 if (pkt_dev->flags & F_VID_RND)
716 seq_printf(seq, "VID_RND ");
717
718 if (pkt_dev->flags & F_SVID_RND)
719 seq_printf(seq, "SVID_RND ");
720
721 seq_puts(seq, "\n");
722
723 sa = pkt_dev->started_at;
724 stopped = pkt_dev->stopped_at;
725 if (pkt_dev->running)
726 stopped = now; /* not really stopped, more like last-running-at */
727
728 seq_printf(seq,
729 "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n",
730 (unsigned long long)pkt_dev->sofar,
731 (unsigned long long)pkt_dev->errors, (unsigned long long)sa,
732 (unsigned long long)stopped,
733 (unsigned long long)pkt_dev->idle_acc);
734
735 seq_printf(seq,
736 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
737 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
738 pkt_dev->cur_src_mac_offset);
739
740 if (pkt_dev->flags & F_IPV6) {
741 char b1[128], b2[128];
742 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
743 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
744 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
745 } else
746 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
747 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
748
749 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
750 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
751
752 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
753
754 if (pkt_dev->result[0])
755 seq_printf(seq, "Result: %s\n", pkt_dev->result);
756 else
757 seq_printf(seq, "Result: Idle\n");
758
759 return 0;
760 }
761
762
763 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, __u32 *num)
764 {
765 int i = 0;
766 *num = 0;
767
768 for(; i < maxlen; i++) {
769 char c;
770 *num <<= 4;
771 if (get_user(c, &user_buffer[i]))
772 return -EFAULT;
773 if ((c >= '0') && (c <= '9'))
774 *num |= c - '0';
775 else if ((c >= 'a') && (c <= 'f'))
776 *num |= c - 'a' + 10;
777 else if ((c >= 'A') && (c <= 'F'))
778 *num |= c - 'A' + 10;
779 else
780 break;
781 }
782 return i;
783 }
784
785 static int count_trail_chars(const char __user * user_buffer,
786 unsigned int maxlen)
787 {
788 int i;
789
790 for (i = 0; i < maxlen; i++) {
791 char c;
792 if (get_user(c, &user_buffer[i]))
793 return -EFAULT;
794 switch (c) {
795 case '\"':
796 case '\n':
797 case '\r':
798 case '\t':
799 case ' ':
800 case '=':
801 break;
802 default:
803 goto done;
804 };
805 }
806 done:
807 return i;
808 }
809
810 static unsigned long num_arg(const char __user * user_buffer,
811 unsigned long maxlen, unsigned long *num)
812 {
813 int i = 0;
814 *num = 0;
815
816 for (; i < maxlen; i++) {
817 char c;
818 if (get_user(c, &user_buffer[i]))
819 return -EFAULT;
820 if ((c >= '0') && (c <= '9')) {
821 *num *= 10;
822 *num += c - '0';
823 } else
824 break;
825 }
826 return i;
827 }
828
829 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
830 {
831 int i = 0;
832
833 for (; i < maxlen; i++) {
834 char c;
835 if (get_user(c, &user_buffer[i]))
836 return -EFAULT;
837 switch (c) {
838 case '\"':
839 case '\n':
840 case '\r':
841 case '\t':
842 case ' ':
843 goto done_str;
844 break;
845 default:
846 break;
847 };
848 }
849 done_str:
850 return i;
851 }
852
853 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
854 {
855 unsigned n = 0;
856 char c;
857 ssize_t i = 0;
858 int len;
859
860 pkt_dev->nr_labels = 0;
861 do {
862 __u32 tmp;
863 len = hex32_arg(&buffer[i], 8, &tmp);
864 if (len <= 0)
865 return len;
866 pkt_dev->labels[n] = htonl(tmp);
867 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
868 pkt_dev->flags |= F_MPLS_RND;
869 i += len;
870 if (get_user(c, &buffer[i]))
871 return -EFAULT;
872 i++;
873 n++;
874 if (n >= MAX_MPLS_LABELS)
875 return -E2BIG;
876 } while(c == ',');
877
878 pkt_dev->nr_labels = n;
879 return i;
880 }
881
882 static ssize_t pktgen_if_write(struct file *file,
883 const char __user * user_buffer, size_t count,
884 loff_t * offset)
885 {
886 struct seq_file *seq = (struct seq_file *)file->private_data;
887 struct pktgen_dev *pkt_dev = seq->private;
888 int i = 0, max, len;
889 char name[16], valstr[32];
890 unsigned long value = 0;
891 char *pg_result = NULL;
892 int tmp = 0;
893 char buf[128];
894
895 pg_result = &(pkt_dev->result[0]);
896
897 if (count < 1) {
898 printk("pktgen: wrong command format\n");
899 return -EINVAL;
900 }
901
902 max = count - i;
903 tmp = count_trail_chars(&user_buffer[i], max);
904 if (tmp < 0) {
905 printk("pktgen: illegal format\n");
906 return tmp;
907 }
908 i += tmp;
909
910 /* Read variable name */
911
912 len = strn_len(&user_buffer[i], sizeof(name) - 1);
913 if (len < 0) {
914 return len;
915 }
916 memset(name, 0, sizeof(name));
917 if (copy_from_user(name, &user_buffer[i], len))
918 return -EFAULT;
919 i += len;
920
921 max = count - i;
922 len = count_trail_chars(&user_buffer[i], max);
923 if (len < 0)
924 return len;
925
926 i += len;
927
928 if (debug) {
929 char tb[count + 1];
930 if (copy_from_user(tb, user_buffer, count))
931 return -EFAULT;
932 tb[count] = 0;
933 printk("pktgen: %s,%lu buffer -:%s:-\n", name,
934 (unsigned long)count, tb);
935 }
936
937 if (!strcmp(name, "min_pkt_size")) {
938 len = num_arg(&user_buffer[i], 10, &value);
939 if (len < 0) {
940 return len;
941 }
942 i += len;
943 if (value < 14 + 20 + 8)
944 value = 14 + 20 + 8;
945 if (value != pkt_dev->min_pkt_size) {
946 pkt_dev->min_pkt_size = value;
947 pkt_dev->cur_pkt_size = value;
948 }
949 sprintf(pg_result, "OK: min_pkt_size=%u",
950 pkt_dev->min_pkt_size);
951 return count;
952 }
953
954 if (!strcmp(name, "max_pkt_size")) {
955 len = num_arg(&user_buffer[i], 10, &value);
956 if (len < 0) {
957 return len;
958 }
959 i += len;
960 if (value < 14 + 20 + 8)
961 value = 14 + 20 + 8;
962 if (value != pkt_dev->max_pkt_size) {
963 pkt_dev->max_pkt_size = value;
964 pkt_dev->cur_pkt_size = value;
965 }
966 sprintf(pg_result, "OK: max_pkt_size=%u",
967 pkt_dev->max_pkt_size);
968 return count;
969 }
970
971 /* Shortcut for min = max */
972
973 if (!strcmp(name, "pkt_size")) {
974 len = num_arg(&user_buffer[i], 10, &value);
975 if (len < 0) {
976 return len;
977 }
978 i += len;
979 if (value < 14 + 20 + 8)
980 value = 14 + 20 + 8;
981 if (value != pkt_dev->min_pkt_size) {
982 pkt_dev->min_pkt_size = value;
983 pkt_dev->max_pkt_size = value;
984 pkt_dev->cur_pkt_size = value;
985 }
986 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
987 return count;
988 }
989
990 if (!strcmp(name, "debug")) {
991 len = num_arg(&user_buffer[i], 10, &value);
992 if (len < 0) {
993 return len;
994 }
995 i += len;
996 debug = value;
997 sprintf(pg_result, "OK: debug=%u", debug);
998 return count;
999 }
1000
1001 if (!strcmp(name, "frags")) {
1002 len = num_arg(&user_buffer[i], 10, &value);
1003 if (len < 0) {
1004 return len;
1005 }
1006 i += len;
1007 pkt_dev->nfrags = value;
1008 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
1009 return count;
1010 }
1011 if (!strcmp(name, "delay")) {
1012 len = num_arg(&user_buffer[i], 10, &value);
1013 if (len < 0) {
1014 return len;
1015 }
1016 i += len;
1017 if (value == 0x7FFFFFFF) {
1018 pkt_dev->delay_us = 0x7FFFFFFF;
1019 pkt_dev->delay_ns = 0;
1020 } else {
1021 pkt_dev->delay_us = value / 1000;
1022 pkt_dev->delay_ns = value % 1000;
1023 }
1024 sprintf(pg_result, "OK: delay=%u",
1025 1000 * pkt_dev->delay_us + pkt_dev->delay_ns);
1026 return count;
1027 }
1028 if (!strcmp(name, "udp_src_min")) {
1029 len = num_arg(&user_buffer[i], 10, &value);
1030 if (len < 0) {
1031 return len;
1032 }
1033 i += len;
1034 if (value != pkt_dev->udp_src_min) {
1035 pkt_dev->udp_src_min = value;
1036 pkt_dev->cur_udp_src = value;
1037 }
1038 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1039 return count;
1040 }
1041 if (!strcmp(name, "udp_dst_min")) {
1042 len = num_arg(&user_buffer[i], 10, &value);
1043 if (len < 0) {
1044 return len;
1045 }
1046 i += len;
1047 if (value != pkt_dev->udp_dst_min) {
1048 pkt_dev->udp_dst_min = value;
1049 pkt_dev->cur_udp_dst = value;
1050 }
1051 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1052 return count;
1053 }
1054 if (!strcmp(name, "udp_src_max")) {
1055 len = num_arg(&user_buffer[i], 10, &value);
1056 if (len < 0) {
1057 return len;
1058 }
1059 i += len;
1060 if (value != pkt_dev->udp_src_max) {
1061 pkt_dev->udp_src_max = value;
1062 pkt_dev->cur_udp_src = value;
1063 }
1064 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1065 return count;
1066 }
1067 if (!strcmp(name, "udp_dst_max")) {
1068 len = num_arg(&user_buffer[i], 10, &value);
1069 if (len < 0) {
1070 return len;
1071 }
1072 i += len;
1073 if (value != pkt_dev->udp_dst_max) {
1074 pkt_dev->udp_dst_max = value;
1075 pkt_dev->cur_udp_dst = value;
1076 }
1077 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1078 return count;
1079 }
1080 if (!strcmp(name, "clone_skb")) {
1081 len = num_arg(&user_buffer[i], 10, &value);
1082 if (len < 0) {
1083 return len;
1084 }
1085 i += len;
1086 pkt_dev->clone_skb = value;
1087
1088 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1089 return count;
1090 }
1091 if (!strcmp(name, "count")) {
1092 len = num_arg(&user_buffer[i], 10, &value);
1093 if (len < 0) {
1094 return len;
1095 }
1096 i += len;
1097 pkt_dev->count = value;
1098 sprintf(pg_result, "OK: count=%llu",
1099 (unsigned long long)pkt_dev->count);
1100 return count;
1101 }
1102 if (!strcmp(name, "src_mac_count")) {
1103 len = num_arg(&user_buffer[i], 10, &value);
1104 if (len < 0) {
1105 return len;
1106 }
1107 i += len;
1108 if (pkt_dev->src_mac_count != value) {
1109 pkt_dev->src_mac_count = value;
1110 pkt_dev->cur_src_mac_offset = 0;
1111 }
1112 sprintf(pg_result, "OK: src_mac_count=%d",
1113 pkt_dev->src_mac_count);
1114 return count;
1115 }
1116 if (!strcmp(name, "dst_mac_count")) {
1117 len = num_arg(&user_buffer[i], 10, &value);
1118 if (len < 0) {
1119 return len;
1120 }
1121 i += len;
1122 if (pkt_dev->dst_mac_count != value) {
1123 pkt_dev->dst_mac_count = value;
1124 pkt_dev->cur_dst_mac_offset = 0;
1125 }
1126 sprintf(pg_result, "OK: dst_mac_count=%d",
1127 pkt_dev->dst_mac_count);
1128 return count;
1129 }
1130 if (!strcmp(name, "flag")) {
1131 char f[32];
1132 memset(f, 0, 32);
1133 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1134 if (len < 0) {
1135 return len;
1136 }
1137 if (copy_from_user(f, &user_buffer[i], len))
1138 return -EFAULT;
1139 i += len;
1140 if (strcmp(f, "IPSRC_RND") == 0)
1141 pkt_dev->flags |= F_IPSRC_RND;
1142
1143 else if (strcmp(f, "!IPSRC_RND") == 0)
1144 pkt_dev->flags &= ~F_IPSRC_RND;
1145
1146 else if (strcmp(f, "TXSIZE_RND") == 0)
1147 pkt_dev->flags |= F_TXSIZE_RND;
1148
1149 else if (strcmp(f, "!TXSIZE_RND") == 0)
1150 pkt_dev->flags &= ~F_TXSIZE_RND;
1151
1152 else if (strcmp(f, "IPDST_RND") == 0)
1153 pkt_dev->flags |= F_IPDST_RND;
1154
1155 else if (strcmp(f, "!IPDST_RND") == 0)
1156 pkt_dev->flags &= ~F_IPDST_RND;
1157
1158 else if (strcmp(f, "UDPSRC_RND") == 0)
1159 pkt_dev->flags |= F_UDPSRC_RND;
1160
1161 else if (strcmp(f, "!UDPSRC_RND") == 0)
1162 pkt_dev->flags &= ~F_UDPSRC_RND;
1163
1164 else if (strcmp(f, "UDPDST_RND") == 0)
1165 pkt_dev->flags |= F_UDPDST_RND;
1166
1167 else if (strcmp(f, "!UDPDST_RND") == 0)
1168 pkt_dev->flags &= ~F_UDPDST_RND;
1169
1170 else if (strcmp(f, "MACSRC_RND") == 0)
1171 pkt_dev->flags |= F_MACSRC_RND;
1172
1173 else if (strcmp(f, "!MACSRC_RND") == 0)
1174 pkt_dev->flags &= ~F_MACSRC_RND;
1175
1176 else if (strcmp(f, "MACDST_RND") == 0)
1177 pkt_dev->flags |= F_MACDST_RND;
1178
1179 else if (strcmp(f, "!MACDST_RND") == 0)
1180 pkt_dev->flags &= ~F_MACDST_RND;
1181
1182 else if (strcmp(f, "MPLS_RND") == 0)
1183 pkt_dev->flags |= F_MPLS_RND;
1184
1185 else if (strcmp(f, "!MPLS_RND") == 0)
1186 pkt_dev->flags &= ~F_MPLS_RND;
1187
1188 else if (strcmp(f, "VID_RND") == 0)
1189 pkt_dev->flags |= F_VID_RND;
1190
1191 else if (strcmp(f, "!VID_RND") == 0)
1192 pkt_dev->flags &= ~F_VID_RND;
1193
1194 else if (strcmp(f, "SVID_RND") == 0)
1195 pkt_dev->flags |= F_SVID_RND;
1196
1197 else if (strcmp(f, "!SVID_RND") == 0)
1198 pkt_dev->flags &= ~F_SVID_RND;
1199
1200 else if (strcmp(f, "!IPV6") == 0)
1201 pkt_dev->flags &= ~F_IPV6;
1202
1203 else {
1204 sprintf(pg_result,
1205 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1206 f,
1207 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1208 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND\n");
1209 return count;
1210 }
1211 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1212 return count;
1213 }
1214 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1215 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1216 if (len < 0) {
1217 return len;
1218 }
1219
1220 if (copy_from_user(buf, &user_buffer[i], len))
1221 return -EFAULT;
1222 buf[len] = 0;
1223 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1224 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1225 strncpy(pkt_dev->dst_min, buf, len);
1226 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1227 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1228 }
1229 if (debug)
1230 printk("pktgen: dst_min set to: %s\n",
1231 pkt_dev->dst_min);
1232 i += len;
1233 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1234 return count;
1235 }
1236 if (!strcmp(name, "dst_max")) {
1237 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1238 if (len < 0) {
1239 return len;
1240 }
1241
1242 if (copy_from_user(buf, &user_buffer[i], len))
1243 return -EFAULT;
1244
1245 buf[len] = 0;
1246 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1247 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1248 strncpy(pkt_dev->dst_max, buf, len);
1249 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1250 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1251 }
1252 if (debug)
1253 printk("pktgen: dst_max set to: %s\n",
1254 pkt_dev->dst_max);
1255 i += len;
1256 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1257 return count;
1258 }
1259 if (!strcmp(name, "dst6")) {
1260 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1261 if (len < 0)
1262 return len;
1263
1264 pkt_dev->flags |= F_IPV6;
1265
1266 if (copy_from_user(buf, &user_buffer[i], len))
1267 return -EFAULT;
1268 buf[len] = 0;
1269
1270 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1271 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1272
1273 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1274
1275 if (debug)
1276 printk("pktgen: dst6 set to: %s\n", buf);
1277
1278 i += len;
1279 sprintf(pg_result, "OK: dst6=%s", buf);
1280 return count;
1281 }
1282 if (!strcmp(name, "dst6_min")) {
1283 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1284 if (len < 0)
1285 return len;
1286
1287 pkt_dev->flags |= F_IPV6;
1288
1289 if (copy_from_user(buf, &user_buffer[i], len))
1290 return -EFAULT;
1291 buf[len] = 0;
1292
1293 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1294 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1295
1296 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1297 &pkt_dev->min_in6_daddr);
1298 if (debug)
1299 printk("pktgen: dst6_min set to: %s\n", buf);
1300
1301 i += len;
1302 sprintf(pg_result, "OK: dst6_min=%s", buf);
1303 return count;
1304 }
1305 if (!strcmp(name, "dst6_max")) {
1306 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1307 if (len < 0)
1308 return len;
1309
1310 pkt_dev->flags |= F_IPV6;
1311
1312 if (copy_from_user(buf, &user_buffer[i], len))
1313 return -EFAULT;
1314 buf[len] = 0;
1315
1316 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1317 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1318
1319 if (debug)
1320 printk("pktgen: dst6_max set to: %s\n", buf);
1321
1322 i += len;
1323 sprintf(pg_result, "OK: dst6_max=%s", buf);
1324 return count;
1325 }
1326 if (!strcmp(name, "src6")) {
1327 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1328 if (len < 0)
1329 return len;
1330
1331 pkt_dev->flags |= F_IPV6;
1332
1333 if (copy_from_user(buf, &user_buffer[i], len))
1334 return -EFAULT;
1335 buf[len] = 0;
1336
1337 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1338 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1339
1340 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1341
1342 if (debug)
1343 printk("pktgen: src6 set to: %s\n", buf);
1344
1345 i += len;
1346 sprintf(pg_result, "OK: src6=%s", buf);
1347 return count;
1348 }
1349 if (!strcmp(name, "src_min")) {
1350 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1351 if (len < 0) {
1352 return len;
1353 }
1354 if (copy_from_user(buf, &user_buffer[i], len))
1355 return -EFAULT;
1356 buf[len] = 0;
1357 if (strcmp(buf, pkt_dev->src_min) != 0) {
1358 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1359 strncpy(pkt_dev->src_min, buf, len);
1360 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1361 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1362 }
1363 if (debug)
1364 printk("pktgen: src_min set to: %s\n",
1365 pkt_dev->src_min);
1366 i += len;
1367 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1368 return count;
1369 }
1370 if (!strcmp(name, "src_max")) {
1371 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1372 if (len < 0) {
1373 return len;
1374 }
1375 if (copy_from_user(buf, &user_buffer[i], len))
1376 return -EFAULT;
1377 buf[len] = 0;
1378 if (strcmp(buf, pkt_dev->src_max) != 0) {
1379 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1380 strncpy(pkt_dev->src_max, buf, len);
1381 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1382 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1383 }
1384 if (debug)
1385 printk("pktgen: src_max set to: %s\n",
1386 pkt_dev->src_max);
1387 i += len;
1388 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1389 return count;
1390 }
1391 if (!strcmp(name, "dst_mac")) {
1392 char *v = valstr;
1393 unsigned char old_dmac[ETH_ALEN];
1394 unsigned char *m = pkt_dev->dst_mac;
1395 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1396
1397 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1398 if (len < 0) {
1399 return len;
1400 }
1401 memset(valstr, 0, sizeof(valstr));
1402 if (copy_from_user(valstr, &user_buffer[i], len))
1403 return -EFAULT;
1404 i += len;
1405
1406 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1407 if (*v >= '0' && *v <= '9') {
1408 *m *= 16;
1409 *m += *v - '0';
1410 }
1411 if (*v >= 'A' && *v <= 'F') {
1412 *m *= 16;
1413 *m += *v - 'A' + 10;
1414 }
1415 if (*v >= 'a' && *v <= 'f') {
1416 *m *= 16;
1417 *m += *v - 'a' + 10;
1418 }
1419 if (*v == ':') {
1420 m++;
1421 *m = 0;
1422 }
1423 }
1424
1425 /* Set up Dest MAC */
1426 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1427 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1428
1429 sprintf(pg_result, "OK: dstmac");
1430 return count;
1431 }
1432 if (!strcmp(name, "src_mac")) {
1433 char *v = valstr;
1434 unsigned char *m = pkt_dev->src_mac;
1435
1436 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1437 if (len < 0) {
1438 return len;
1439 }
1440 memset(valstr, 0, sizeof(valstr));
1441 if (copy_from_user(valstr, &user_buffer[i], len))
1442 return -EFAULT;
1443 i += len;
1444
1445 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1446 if (*v >= '0' && *v <= '9') {
1447 *m *= 16;
1448 *m += *v - '0';
1449 }
1450 if (*v >= 'A' && *v <= 'F') {
1451 *m *= 16;
1452 *m += *v - 'A' + 10;
1453 }
1454 if (*v >= 'a' && *v <= 'f') {
1455 *m *= 16;
1456 *m += *v - 'a' + 10;
1457 }
1458 if (*v == ':') {
1459 m++;
1460 *m = 0;
1461 }
1462 }
1463
1464 sprintf(pg_result, "OK: srcmac");
1465 return count;
1466 }
1467
1468 if (!strcmp(name, "clear_counters")) {
1469 pktgen_clear_counters(pkt_dev);
1470 sprintf(pg_result, "OK: Clearing counters.\n");
1471 return count;
1472 }
1473
1474 if (!strcmp(name, "flows")) {
1475 len = num_arg(&user_buffer[i], 10, &value);
1476 if (len < 0) {
1477 return len;
1478 }
1479 i += len;
1480 if (value > MAX_CFLOWS)
1481 value = MAX_CFLOWS;
1482
1483 pkt_dev->cflows = value;
1484 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1485 return count;
1486 }
1487
1488 if (!strcmp(name, "flowlen")) {
1489 len = num_arg(&user_buffer[i], 10, &value);
1490 if (len < 0) {
1491 return len;
1492 }
1493 i += len;
1494 pkt_dev->lflow = value;
1495 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1496 return count;
1497 }
1498
1499 if (!strcmp(name, "mpls")) {
1500 unsigned n, offset;
1501 len = get_labels(&user_buffer[i], pkt_dev);
1502 if (len < 0) { return len; }
1503 i += len;
1504 offset = sprintf(pg_result, "OK: mpls=");
1505 for(n = 0; n < pkt_dev->nr_labels; n++)
1506 offset += sprintf(pg_result + offset,
1507 "%08x%s", ntohl(pkt_dev->labels[n]),
1508 n == pkt_dev->nr_labels-1 ? "" : ",");
1509
1510 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1511 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1512 pkt_dev->svlan_id = 0xffff;
1513
1514 if (debug)
1515 printk("pktgen: VLAN/SVLAN auto turned off\n");
1516 }
1517 return count;
1518 }
1519
1520 if (!strcmp(name, "vlan_id")) {
1521 len = num_arg(&user_buffer[i], 4, &value);
1522 if (len < 0) {
1523 return len;
1524 }
1525 i += len;
1526 if (value <= 4095) {
1527 pkt_dev->vlan_id = value; /* turn on VLAN */
1528
1529 if (debug)
1530 printk("pktgen: VLAN turned on\n");
1531
1532 if (debug && pkt_dev->nr_labels)
1533 printk("pktgen: MPLS auto turned off\n");
1534
1535 pkt_dev->nr_labels = 0; /* turn off MPLS */
1536 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1537 } else {
1538 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1539 pkt_dev->svlan_id = 0xffff;
1540
1541 if (debug)
1542 printk("pktgen: VLAN/SVLAN turned off\n");
1543 }
1544 return count;
1545 }
1546
1547 if (!strcmp(name, "vlan_p")) {
1548 len = num_arg(&user_buffer[i], 1, &value);
1549 if (len < 0) {
1550 return len;
1551 }
1552 i += len;
1553 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1554 pkt_dev->vlan_p = value;
1555 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1556 } else {
1557 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1558 }
1559 return count;
1560 }
1561
1562 if (!strcmp(name, "vlan_cfi")) {
1563 len = num_arg(&user_buffer[i], 1, &value);
1564 if (len < 0) {
1565 return len;
1566 }
1567 i += len;
1568 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1569 pkt_dev->vlan_cfi = value;
1570 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1571 } else {
1572 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1573 }
1574 return count;
1575 }
1576
1577 if (!strcmp(name, "svlan_id")) {
1578 len = num_arg(&user_buffer[i], 4, &value);
1579 if (len < 0) {
1580 return len;
1581 }
1582 i += len;
1583 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1584 pkt_dev->svlan_id = value; /* turn on SVLAN */
1585
1586 if (debug)
1587 printk("pktgen: SVLAN turned on\n");
1588
1589 if (debug && pkt_dev->nr_labels)
1590 printk("pktgen: MPLS auto turned off\n");
1591
1592 pkt_dev->nr_labels = 0; /* turn off MPLS */
1593 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1594 } else {
1595 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1596 pkt_dev->svlan_id = 0xffff;
1597
1598 if (debug)
1599 printk("pktgen: VLAN/SVLAN turned off\n");
1600 }
1601 return count;
1602 }
1603
1604 if (!strcmp(name, "svlan_p")) {
1605 len = num_arg(&user_buffer[i], 1, &value);
1606 if (len < 0) {
1607 return len;
1608 }
1609 i += len;
1610 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1611 pkt_dev->svlan_p = value;
1612 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1613 } else {
1614 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1615 }
1616 return count;
1617 }
1618
1619 if (!strcmp(name, "svlan_cfi")) {
1620 len = num_arg(&user_buffer[i], 1, &value);
1621 if (len < 0) {
1622 return len;
1623 }
1624 i += len;
1625 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1626 pkt_dev->svlan_cfi = value;
1627 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1628 } else {
1629 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1630 }
1631 return count;
1632 }
1633
1634 if (!strcmp(name, "tos")) {
1635 __u32 tmp_value = 0;
1636 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1637 if (len < 0) {
1638 return len;
1639 }
1640 i += len;
1641 if (len == 2) {
1642 pkt_dev->tos = tmp_value;
1643 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1644 } else {
1645 sprintf(pg_result, "ERROR: tos must be 00-ff");
1646 }
1647 return count;
1648 }
1649
1650 if (!strcmp(name, "traffic_class")) {
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->traffic_class = tmp_value;
1659 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1660 } else {
1661 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1662 }
1663 return count;
1664 }
1665
1666 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1667 return -EINVAL;
1668 }
1669
1670 static int pktgen_if_open(struct inode *inode, struct file *file)
1671 {
1672 return single_open(file, pktgen_if_show, PDE(inode)->data);
1673 }
1674
1675 static struct file_operations pktgen_if_fops = {
1676 .owner = THIS_MODULE,
1677 .open = pktgen_if_open,
1678 .read = seq_read,
1679 .llseek = seq_lseek,
1680 .write = pktgen_if_write,
1681 .release = single_release,
1682 };
1683
1684 static int pktgen_thread_show(struct seq_file *seq, void *v)
1685 {
1686 struct pktgen_thread *t = seq->private;
1687 struct pktgen_dev *pkt_dev;
1688
1689 BUG_ON(!t);
1690
1691 seq_printf(seq, "Name: %s max_before_softirq: %d\n",
1692 t->name, t->max_before_softirq);
1693
1694 seq_printf(seq, "Running: ");
1695
1696 if_lock(t);
1697 list_for_each_entry(pkt_dev, &t->if_list, list)
1698 if (pkt_dev->running)
1699 seq_printf(seq, "%s ", pkt_dev->ifname);
1700
1701 seq_printf(seq, "\nStopped: ");
1702
1703 list_for_each_entry(pkt_dev, &t->if_list, list)
1704 if (!pkt_dev->running)
1705 seq_printf(seq, "%s ", pkt_dev->ifname);
1706
1707 if (t->result[0])
1708 seq_printf(seq, "\nResult: %s\n", t->result);
1709 else
1710 seq_printf(seq, "\nResult: NA\n");
1711
1712 if_unlock(t);
1713
1714 return 0;
1715 }
1716
1717 static ssize_t pktgen_thread_write(struct file *file,
1718 const char __user * user_buffer,
1719 size_t count, loff_t * offset)
1720 {
1721 struct seq_file *seq = (struct seq_file *)file->private_data;
1722 struct pktgen_thread *t = seq->private;
1723 int i = 0, max, len, ret;
1724 char name[40];
1725 char *pg_result;
1726 unsigned long value = 0;
1727
1728 if (count < 1) {
1729 // sprintf(pg_result, "Wrong command format");
1730 return -EINVAL;
1731 }
1732
1733 max = count - i;
1734 len = count_trail_chars(&user_buffer[i], max);
1735 if (len < 0)
1736 return len;
1737
1738 i += len;
1739
1740 /* Read variable name */
1741
1742 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1743 if (len < 0)
1744 return len;
1745
1746 memset(name, 0, sizeof(name));
1747 if (copy_from_user(name, &user_buffer[i], len))
1748 return -EFAULT;
1749 i += len;
1750
1751 max = count - i;
1752 len = count_trail_chars(&user_buffer[i], max);
1753 if (len < 0)
1754 return len;
1755
1756 i += len;
1757
1758 if (debug)
1759 printk("pktgen: t=%s, count=%lu\n", name, (unsigned long)count);
1760
1761 if (!t) {
1762 printk("pktgen: ERROR: No thread\n");
1763 ret = -EINVAL;
1764 goto out;
1765 }
1766
1767 pg_result = &(t->result[0]);
1768
1769 if (!strcmp(name, "add_device")) {
1770 char f[32];
1771 memset(f, 0, 32);
1772 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1773 if (len < 0) {
1774 ret = len;
1775 goto out;
1776 }
1777 if (copy_from_user(f, &user_buffer[i], len))
1778 return -EFAULT;
1779 i += len;
1780 mutex_lock(&pktgen_thread_lock);
1781 pktgen_add_device(t, f);
1782 mutex_unlock(&pktgen_thread_lock);
1783 ret = count;
1784 sprintf(pg_result, "OK: add_device=%s", f);
1785 goto out;
1786 }
1787
1788 if (!strcmp(name, "rem_device_all")) {
1789 mutex_lock(&pktgen_thread_lock);
1790 t->control |= T_REMDEVALL;
1791 mutex_unlock(&pktgen_thread_lock);
1792 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1793 ret = count;
1794 sprintf(pg_result, "OK: rem_device_all");
1795 goto out;
1796 }
1797
1798 if (!strcmp(name, "max_before_softirq")) {
1799 len = num_arg(&user_buffer[i], 10, &value);
1800 mutex_lock(&pktgen_thread_lock);
1801 t->max_before_softirq = value;
1802 mutex_unlock(&pktgen_thread_lock);
1803 ret = count;
1804 sprintf(pg_result, "OK: max_before_softirq=%lu", value);
1805 goto out;
1806 }
1807
1808 ret = -EINVAL;
1809 out:
1810 return ret;
1811 }
1812
1813 static int pktgen_thread_open(struct inode *inode, struct file *file)
1814 {
1815 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1816 }
1817
1818 static struct file_operations pktgen_thread_fops = {
1819 .owner = THIS_MODULE,
1820 .open = pktgen_thread_open,
1821 .read = seq_read,
1822 .llseek = seq_lseek,
1823 .write = pktgen_thread_write,
1824 .release = single_release,
1825 };
1826
1827 /* Think find or remove for NN */
1828 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1829 {
1830 struct pktgen_thread *t;
1831 struct pktgen_dev *pkt_dev = NULL;
1832
1833 list_for_each_entry(t, &pktgen_threads, th_list) {
1834 pkt_dev = pktgen_find_dev(t, ifname);
1835 if (pkt_dev) {
1836 if (remove) {
1837 if_lock(t);
1838 pkt_dev->removal_mark = 1;
1839 t->control |= T_REMDEV;
1840 if_unlock(t);
1841 }
1842 break;
1843 }
1844 }
1845 return pkt_dev;
1846 }
1847
1848 /*
1849 * mark a device for removal
1850 */
1851 static int pktgen_mark_device(const char *ifname)
1852 {
1853 struct pktgen_dev *pkt_dev = NULL;
1854 const int max_tries = 10, msec_per_try = 125;
1855 int i = 0;
1856 int ret = 0;
1857
1858 mutex_lock(&pktgen_thread_lock);
1859 PG_DEBUG(printk("pktgen: pktgen_mark_device marking %s for removal\n",
1860 ifname));
1861
1862 while (1) {
1863
1864 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1865 if (pkt_dev == NULL)
1866 break; /* success */
1867
1868 mutex_unlock(&pktgen_thread_lock);
1869 PG_DEBUG(printk("pktgen: pktgen_mark_device waiting for %s "
1870 "to disappear....\n", ifname));
1871 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1872 mutex_lock(&pktgen_thread_lock);
1873
1874 if (++i >= max_tries) {
1875 printk("pktgen_mark_device: timed out after waiting "
1876 "%d msec for device %s to be removed\n",
1877 msec_per_try * i, ifname);
1878 ret = 1;
1879 break;
1880 }
1881
1882 }
1883
1884 mutex_unlock(&pktgen_thread_lock);
1885
1886 return ret;
1887 }
1888
1889 static int pktgen_device_event(struct notifier_block *unused,
1890 unsigned long event, void *ptr)
1891 {
1892 struct net_device *dev = (struct net_device *)(ptr);
1893
1894 /* It is OK that we do not hold the group lock right now,
1895 * as we run under the RTNL lock.
1896 */
1897
1898 switch (event) {
1899 case NETDEV_CHANGEADDR:
1900 case NETDEV_GOING_DOWN:
1901 case NETDEV_DOWN:
1902 case NETDEV_UP:
1903 /* Ignore for now */
1904 break;
1905
1906 case NETDEV_UNREGISTER:
1907 pktgen_mark_device(dev->name);
1908 break;
1909 };
1910
1911 return NOTIFY_DONE;
1912 }
1913
1914 /* Associate pktgen_dev with a device. */
1915
1916 static struct net_device *pktgen_setup_dev(struct pktgen_dev *pkt_dev)
1917 {
1918 struct net_device *odev;
1919
1920 /* Clean old setups */
1921
1922 if (pkt_dev->odev) {
1923 dev_put(pkt_dev->odev);
1924 pkt_dev->odev = NULL;
1925 }
1926
1927 odev = dev_get_by_name(pkt_dev->ifname);
1928
1929 if (!odev) {
1930 printk("pktgen: no such netdevice: \"%s\"\n", pkt_dev->ifname);
1931 goto out;
1932 }
1933 if (odev->type != ARPHRD_ETHER) {
1934 printk("pktgen: not an ethernet device: \"%s\"\n",
1935 pkt_dev->ifname);
1936 goto out_put;
1937 }
1938 if (!netif_running(odev)) {
1939 printk("pktgen: device is down: \"%s\"\n", pkt_dev->ifname);
1940 goto out_put;
1941 }
1942 pkt_dev->odev = odev;
1943
1944 return pkt_dev->odev;
1945
1946 out_put:
1947 dev_put(odev);
1948 out:
1949 return NULL;
1950
1951 }
1952
1953 /* Read pkt_dev from the interface and set up internal pktgen_dev
1954 * structure to have the right information to create/send packets
1955 */
1956 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
1957 {
1958 /* Try once more, just in case it works now. */
1959 if (!pkt_dev->odev)
1960 pktgen_setup_dev(pkt_dev);
1961
1962 if (!pkt_dev->odev) {
1963 printk("pktgen: ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1964 sprintf(pkt_dev->result,
1965 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1966 return;
1967 }
1968
1969 /* Default to the interface's mac if not explicitly set. */
1970
1971 if (is_zero_ether_addr(pkt_dev->src_mac))
1972 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
1973
1974 /* Set up Dest MAC */
1975 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1976
1977 /* Set up pkt size */
1978 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
1979
1980 if (pkt_dev->flags & F_IPV6) {
1981 /*
1982 * Skip this automatic address setting until locks or functions
1983 * gets exported
1984 */
1985
1986 #ifdef NOTNOW
1987 int i, set = 0, err = 1;
1988 struct inet6_dev *idev;
1989
1990 for (i = 0; i < IN6_ADDR_HSIZE; i++)
1991 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
1992 set = 1;
1993 break;
1994 }
1995
1996 if (!set) {
1997
1998 /*
1999 * Use linklevel address if unconfigured.
2000 *
2001 * use ipv6_get_lladdr if/when it's get exported
2002 */
2003
2004 rcu_read_lock();
2005 if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) {
2006 struct inet6_ifaddr *ifp;
2007
2008 read_lock_bh(&idev->lock);
2009 for (ifp = idev->addr_list; ifp;
2010 ifp = ifp->if_next) {
2011 if (ifp->scope == IFA_LINK
2012 && !(ifp->
2013 flags & IFA_F_TENTATIVE)) {
2014 ipv6_addr_copy(&pkt_dev->
2015 cur_in6_saddr,
2016 &ifp->addr);
2017 err = 0;
2018 break;
2019 }
2020 }
2021 read_unlock_bh(&idev->lock);
2022 }
2023 rcu_read_unlock();
2024 if (err)
2025 printk("pktgen: ERROR: IPv6 link address not availble.\n");
2026 }
2027 #endif
2028 } else {
2029 pkt_dev->saddr_min = 0;
2030 pkt_dev->saddr_max = 0;
2031 if (strlen(pkt_dev->src_min) == 0) {
2032
2033 struct in_device *in_dev;
2034
2035 rcu_read_lock();
2036 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2037 if (in_dev) {
2038 if (in_dev->ifa_list) {
2039 pkt_dev->saddr_min =
2040 in_dev->ifa_list->ifa_address;
2041 pkt_dev->saddr_max = pkt_dev->saddr_min;
2042 }
2043 }
2044 rcu_read_unlock();
2045 } else {
2046 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2047 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2048 }
2049
2050 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2051 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2052 }
2053 /* Initialize current values. */
2054 pkt_dev->cur_dst_mac_offset = 0;
2055 pkt_dev->cur_src_mac_offset = 0;
2056 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2057 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2058 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2059 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2060 pkt_dev->nflows = 0;
2061 }
2062
2063 static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us)
2064 {
2065 __u64 start;
2066 __u64 now;
2067
2068 start = now = getCurUs();
2069 printk(KERN_INFO "sleeping for %d\n", (int)(spin_until_us - now));
2070 while (now < spin_until_us) {
2071 /* TODO: optimize sleeping behavior */
2072 if (spin_until_us - now > jiffies_to_usecs(1) + 1)
2073 schedule_timeout_interruptible(1);
2074 else if (spin_until_us - now > 100) {
2075 do_softirq();
2076 if (!pkt_dev->running)
2077 return;
2078 if (need_resched())
2079 schedule();
2080 }
2081
2082 now = getCurUs();
2083 }
2084
2085 pkt_dev->idle_acc += now - start;
2086 }
2087
2088 /* Increment/randomize headers according to flags and current values
2089 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2090 */
2091 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2092 {
2093 __u32 imn;
2094 __u32 imx;
2095 int flow = 0;
2096
2097 if (pkt_dev->cflows) {
2098 flow = pktgen_random() % pkt_dev->cflows;
2099
2100 if (pkt_dev->flows[flow].count > pkt_dev->lflow)
2101 pkt_dev->flows[flow].count = 0;
2102 }
2103
2104 /* Deal with source MAC */
2105 if (pkt_dev->src_mac_count > 1) {
2106 __u32 mc;
2107 __u32 tmp;
2108
2109 if (pkt_dev->flags & F_MACSRC_RND)
2110 mc = pktgen_random() % (pkt_dev->src_mac_count);
2111 else {
2112 mc = pkt_dev->cur_src_mac_offset++;
2113 if (pkt_dev->cur_src_mac_offset >
2114 pkt_dev->src_mac_count)
2115 pkt_dev->cur_src_mac_offset = 0;
2116 }
2117
2118 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2119 pkt_dev->hh[11] = tmp;
2120 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2121 pkt_dev->hh[10] = tmp;
2122 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2123 pkt_dev->hh[9] = tmp;
2124 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2125 pkt_dev->hh[8] = tmp;
2126 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2127 pkt_dev->hh[7] = tmp;
2128 }
2129
2130 /* Deal with Destination MAC */
2131 if (pkt_dev->dst_mac_count > 1) {
2132 __u32 mc;
2133 __u32 tmp;
2134
2135 if (pkt_dev->flags & F_MACDST_RND)
2136 mc = pktgen_random() % (pkt_dev->dst_mac_count);
2137
2138 else {
2139 mc = pkt_dev->cur_dst_mac_offset++;
2140 if (pkt_dev->cur_dst_mac_offset >
2141 pkt_dev->dst_mac_count) {
2142 pkt_dev->cur_dst_mac_offset = 0;
2143 }
2144 }
2145
2146 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2147 pkt_dev->hh[5] = tmp;
2148 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2149 pkt_dev->hh[4] = tmp;
2150 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2151 pkt_dev->hh[3] = tmp;
2152 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2153 pkt_dev->hh[2] = tmp;
2154 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2155 pkt_dev->hh[1] = tmp;
2156 }
2157
2158 if (pkt_dev->flags & F_MPLS_RND) {
2159 unsigned i;
2160 for(i = 0; i < pkt_dev->nr_labels; i++)
2161 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2162 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2163 ((__force __be32)pktgen_random() &
2164 htonl(0x000fffff));
2165 }
2166
2167 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2168 pkt_dev->vlan_id = pktgen_random() % 4096;
2169 }
2170
2171 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2172 pkt_dev->svlan_id = pktgen_random() % 4096;
2173 }
2174
2175 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2176 if (pkt_dev->flags & F_UDPSRC_RND)
2177 pkt_dev->cur_udp_src =
2178 ((pktgen_random() %
2179 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)) +
2180 pkt_dev->udp_src_min);
2181
2182 else {
2183 pkt_dev->cur_udp_src++;
2184 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2185 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2186 }
2187 }
2188
2189 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2190 if (pkt_dev->flags & F_UDPDST_RND) {
2191 pkt_dev->cur_udp_dst =
2192 ((pktgen_random() %
2193 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)) +
2194 pkt_dev->udp_dst_min);
2195 } else {
2196 pkt_dev->cur_udp_dst++;
2197 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2198 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2199 }
2200 }
2201
2202 if (!(pkt_dev->flags & F_IPV6)) {
2203
2204 if ((imn = ntohl(pkt_dev->saddr_min)) < (imx =
2205 ntohl(pkt_dev->
2206 saddr_max))) {
2207 __u32 t;
2208 if (pkt_dev->flags & F_IPSRC_RND)
2209 t = ((pktgen_random() % (imx - imn)) + imn);
2210 else {
2211 t = ntohl(pkt_dev->cur_saddr);
2212 t++;
2213 if (t > imx) {
2214 t = imn;
2215 }
2216 }
2217 pkt_dev->cur_saddr = htonl(t);
2218 }
2219
2220 if (pkt_dev->cflows && pkt_dev->flows[flow].count != 0) {
2221 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2222 } else {
2223 imn = ntohl(pkt_dev->daddr_min);
2224 imx = ntohl(pkt_dev->daddr_max);
2225 if (imn < imx) {
2226 __u32 t;
2227 __be32 s;
2228 if (pkt_dev->flags & F_IPDST_RND) {
2229
2230 t = pktgen_random() % (imx - imn) + imn;
2231 s = htonl(t);
2232
2233 while (LOOPBACK(s) || MULTICAST(s)
2234 || BADCLASS(s) || ZERONET(s)
2235 || LOCAL_MCAST(s)) {
2236 t = (pktgen_random() %
2237 (imx - imn)) + imn;
2238 s = htonl(t);
2239 }
2240 pkt_dev->cur_daddr = s;
2241 } else {
2242 t = ntohl(pkt_dev->cur_daddr);
2243 t++;
2244 if (t > imx) {
2245 t = imn;
2246 }
2247 pkt_dev->cur_daddr = htonl(t);
2248 }
2249 }
2250 if (pkt_dev->cflows) {
2251 pkt_dev->flows[flow].cur_daddr =
2252 pkt_dev->cur_daddr;
2253 pkt_dev->nflows++;
2254 }
2255 }
2256 } else { /* IPV6 * */
2257
2258 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2259 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2260 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2261 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2262 else {
2263 int i;
2264
2265 /* Only random destinations yet */
2266
2267 for (i = 0; i < 4; i++) {
2268 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2269 (((__force __be32)pktgen_random() |
2270 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2271 pkt_dev->max_in6_daddr.s6_addr32[i]);
2272 }
2273 }
2274 }
2275
2276 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2277 __u32 t;
2278 if (pkt_dev->flags & F_TXSIZE_RND) {
2279 t = ((pktgen_random() %
2280 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size))
2281 + pkt_dev->min_pkt_size);
2282 } else {
2283 t = pkt_dev->cur_pkt_size + 1;
2284 if (t > pkt_dev->max_pkt_size)
2285 t = pkt_dev->min_pkt_size;
2286 }
2287 pkt_dev->cur_pkt_size = t;
2288 }
2289
2290 pkt_dev->flows[flow].count++;
2291 }
2292
2293 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2294 {
2295 unsigned i;
2296 for(i = 0; i < pkt_dev->nr_labels; i++) {
2297 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2298 }
2299 mpls--;
2300 *mpls |= MPLS_STACK_BOTTOM;
2301 }
2302
2303 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2304 unsigned int prio)
2305 {
2306 return htons(id | (cfi << 12) | (prio << 13));
2307 }
2308
2309 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2310 struct pktgen_dev *pkt_dev)
2311 {
2312 struct sk_buff *skb = NULL;
2313 __u8 *eth;
2314 struct udphdr *udph;
2315 int datalen, iplen;
2316 struct iphdr *iph;
2317 struct pktgen_hdr *pgh = NULL;
2318 __be16 protocol = __constant_htons(ETH_P_IP);
2319 __be32 *mpls;
2320 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2321 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2322 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2323 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2324
2325
2326 if (pkt_dev->nr_labels)
2327 protocol = __constant_htons(ETH_P_MPLS_UC);
2328
2329 if (pkt_dev->vlan_id != 0xffff)
2330 protocol = __constant_htons(ETH_P_8021Q);
2331
2332 /* Update any of the values, used when we're incrementing various
2333 * fields.
2334 */
2335 mod_cur_headers(pkt_dev);
2336
2337 datalen = (odev->hard_header_len + 16) & ~0xf;
2338 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + datalen +
2339 pkt_dev->nr_labels*sizeof(u32) +
2340 VLAN_TAG_SIZE(pkt_dev) + SVLAN_TAG_SIZE(pkt_dev),
2341 GFP_ATOMIC);
2342 if (!skb) {
2343 sprintf(pkt_dev->result, "No memory");
2344 return NULL;
2345 }
2346
2347 skb_reserve(skb, datalen);
2348
2349 /* Reserve for ethernet and IP header */
2350 eth = (__u8 *) skb_push(skb, 14);
2351 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2352 if (pkt_dev->nr_labels)
2353 mpls_push(mpls, pkt_dev);
2354
2355 if (pkt_dev->vlan_id != 0xffff) {
2356 if(pkt_dev->svlan_id != 0xffff) {
2357 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2358 *svlan_tci = build_tci(pkt_dev->svlan_id,
2359 pkt_dev->svlan_cfi,
2360 pkt_dev->svlan_p);
2361 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2362 *svlan_encapsulated_proto = __constant_htons(ETH_P_8021Q);
2363 }
2364 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2365 *vlan_tci = build_tci(pkt_dev->vlan_id,
2366 pkt_dev->vlan_cfi,
2367 pkt_dev->vlan_p);
2368 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2369 *vlan_encapsulated_proto = __constant_htons(ETH_P_IP);
2370 }
2371
2372 iph = (struct iphdr *)skb_put(skb, sizeof(struct iphdr));
2373 udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
2374
2375 memcpy(eth, pkt_dev->hh, 12);
2376 *(__be16 *) & eth[12] = protocol;
2377
2378 /* Eth + IPh + UDPh + mpls */
2379 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2380 pkt_dev->nr_labels*sizeof(u32) - VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev);
2381 if (datalen < sizeof(struct pktgen_hdr))
2382 datalen = sizeof(struct pktgen_hdr);
2383
2384 udph->source = htons(pkt_dev->cur_udp_src);
2385 udph->dest = htons(pkt_dev->cur_udp_dst);
2386 udph->len = htons(datalen + 8); /* DATA + udphdr */
2387 udph->check = 0; /* No checksum */
2388
2389 iph->ihl = 5;
2390 iph->version = 4;
2391 iph->ttl = 32;
2392 iph->tos = pkt_dev->tos;
2393 iph->protocol = IPPROTO_UDP; /* UDP */
2394 iph->saddr = pkt_dev->cur_saddr;
2395 iph->daddr = pkt_dev->cur_daddr;
2396 iph->frag_off = 0;
2397 iplen = 20 + 8 + datalen;
2398 iph->tot_len = htons(iplen);
2399 iph->check = 0;
2400 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2401 skb->protocol = protocol;
2402 skb->mac.raw = ((u8 *) iph) - 14 - pkt_dev->nr_labels*sizeof(u32) -
2403 VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev);
2404 skb->dev = odev;
2405 skb->pkt_type = PACKET_HOST;
2406 skb->nh.iph = iph;
2407 skb->h.uh = udph;
2408
2409 if (pkt_dev->nfrags <= 0)
2410 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2411 else {
2412 int frags = pkt_dev->nfrags;
2413 int i;
2414
2415 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2416
2417 if (frags > MAX_SKB_FRAGS)
2418 frags = MAX_SKB_FRAGS;
2419 if (datalen > frags * PAGE_SIZE) {
2420 skb_put(skb, datalen - frags * PAGE_SIZE);
2421 datalen = frags * PAGE_SIZE;
2422 }
2423
2424 i = 0;
2425 while (datalen > 0) {
2426 struct page *page = alloc_pages(GFP_KERNEL, 0);
2427 skb_shinfo(skb)->frags[i].page = page;
2428 skb_shinfo(skb)->frags[i].page_offset = 0;
2429 skb_shinfo(skb)->frags[i].size =
2430 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2431 datalen -= skb_shinfo(skb)->frags[i].size;
2432 skb->len += skb_shinfo(skb)->frags[i].size;
2433 skb->data_len += skb_shinfo(skb)->frags[i].size;
2434 i++;
2435 skb_shinfo(skb)->nr_frags = i;
2436 }
2437
2438 while (i < frags) {
2439 int rem;
2440
2441 if (i == 0)
2442 break;
2443
2444 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2445 if (rem == 0)
2446 break;
2447
2448 skb_shinfo(skb)->frags[i - 1].size -= rem;
2449
2450 skb_shinfo(skb)->frags[i] =
2451 skb_shinfo(skb)->frags[i - 1];
2452 get_page(skb_shinfo(skb)->frags[i].page);
2453 skb_shinfo(skb)->frags[i].page =
2454 skb_shinfo(skb)->frags[i - 1].page;
2455 skb_shinfo(skb)->frags[i].page_offset +=
2456 skb_shinfo(skb)->frags[i - 1].size;
2457 skb_shinfo(skb)->frags[i].size = rem;
2458 i++;
2459 skb_shinfo(skb)->nr_frags = i;
2460 }
2461 }
2462
2463 /* Stamp the time, and sequence number, convert them to network byte order */
2464
2465 if (pgh) {
2466 struct timeval timestamp;
2467
2468 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2469 pgh->seq_num = htonl(pkt_dev->seq_num);
2470
2471 do_gettimeofday(&timestamp);
2472 pgh->tv_sec = htonl(timestamp.tv_sec);
2473 pgh->tv_usec = htonl(timestamp.tv_usec);
2474 }
2475
2476 return skb;
2477 }
2478
2479 /*
2480 * scan_ip6, fmt_ip taken from dietlibc-0.21
2481 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2482 *
2483 * Slightly modified for kernel.
2484 * Should be candidate for net/ipv4/utils.c
2485 * --ro
2486 */
2487
2488 static unsigned int scan_ip6(const char *s, char ip[16])
2489 {
2490 unsigned int i;
2491 unsigned int len = 0;
2492 unsigned long u;
2493 char suffix[16];
2494 unsigned int prefixlen = 0;
2495 unsigned int suffixlen = 0;
2496 __be32 tmp;
2497
2498 for (i = 0; i < 16; i++)
2499 ip[i] = 0;
2500
2501 for (;;) {
2502 if (*s == ':') {
2503 len++;
2504 if (s[1] == ':') { /* Found "::", skip to part 2 */
2505 s += 2;
2506 len++;
2507 break;
2508 }
2509 s++;
2510 }
2511 {
2512 char *tmp;
2513 u = simple_strtoul(s, &tmp, 16);
2514 i = tmp - s;
2515 }
2516
2517 if (!i)
2518 return 0;
2519 if (prefixlen == 12 && s[i] == '.') {
2520
2521 /* the last 4 bytes may be written as IPv4 address */
2522
2523 tmp = in_aton(s);
2524 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2525 return i + len;
2526 }
2527 ip[prefixlen++] = (u >> 8);
2528 ip[prefixlen++] = (u & 255);
2529 s += i;
2530 len += i;
2531 if (prefixlen == 16)
2532 return len;
2533 }
2534
2535 /* part 2, after "::" */
2536 for (;;) {
2537 if (*s == ':') {
2538 if (suffixlen == 0)
2539 break;
2540 s++;
2541 len++;
2542 } else if (suffixlen != 0)
2543 break;
2544 {
2545 char *tmp;
2546 u = simple_strtol(s, &tmp, 16);
2547 i = tmp - s;
2548 }
2549 if (!i) {
2550 if (*s)
2551 len--;
2552 break;
2553 }
2554 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2555 tmp = in_aton(s);
2556 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2557 sizeof(tmp));
2558 suffixlen += 4;
2559 len += strlen(s);
2560 break;
2561 }
2562 suffix[suffixlen++] = (u >> 8);
2563 suffix[suffixlen++] = (u & 255);
2564 s += i;
2565 len += i;
2566 if (prefixlen + suffixlen == 16)
2567 break;
2568 }
2569 for (i = 0; i < suffixlen; i++)
2570 ip[16 - suffixlen + i] = suffix[i];
2571 return len;
2572 }
2573
2574 static char tohex(char hexdigit)
2575 {
2576 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2577 }
2578
2579 static int fmt_xlong(char *s, unsigned int i)
2580 {
2581 char *bak = s;
2582 *s = tohex((i >> 12) & 0xf);
2583 if (s != bak || *s != '0')
2584 ++s;
2585 *s = tohex((i >> 8) & 0xf);
2586 if (s != bak || *s != '0')
2587 ++s;
2588 *s = tohex((i >> 4) & 0xf);
2589 if (s != bak || *s != '0')
2590 ++s;
2591 *s = tohex(i & 0xf);
2592 return s - bak + 1;
2593 }
2594
2595 static unsigned int fmt_ip6(char *s, const char ip[16])
2596 {
2597 unsigned int len;
2598 unsigned int i;
2599 unsigned int temp;
2600 unsigned int compressing;
2601 int j;
2602
2603 len = 0;
2604 compressing = 0;
2605 for (j = 0; j < 16; j += 2) {
2606
2607 #ifdef V4MAPPEDPREFIX
2608 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2609 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2610 temp = strlen(s);
2611 return len + temp;
2612 }
2613 #endif
2614 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2615 (unsigned long)(unsigned char)ip[j + 1];
2616 if (temp == 0) {
2617 if (!compressing) {
2618 compressing = 1;
2619 if (j == 0) {
2620 *s++ = ':';
2621 ++len;
2622 }
2623 }
2624 } else {
2625 if (compressing) {
2626 compressing = 0;
2627 *s++ = ':';
2628 ++len;
2629 }
2630 i = fmt_xlong(s, temp);
2631 len += i;
2632 s += i;
2633 if (j < 14) {
2634 *s++ = ':';
2635 ++len;
2636 }
2637 }
2638 }
2639 if (compressing) {
2640 *s++ = ':';
2641 ++len;
2642 }
2643 *s = 0;
2644 return len;
2645 }
2646
2647 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2648 struct pktgen_dev *pkt_dev)
2649 {
2650 struct sk_buff *skb = NULL;
2651 __u8 *eth;
2652 struct udphdr *udph;
2653 int datalen;
2654 struct ipv6hdr *iph;
2655 struct pktgen_hdr *pgh = NULL;
2656 __be16 protocol = __constant_htons(ETH_P_IPV6);
2657 __be32 *mpls;
2658 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2659 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2660 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2661 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2662
2663 if (pkt_dev->nr_labels)
2664 protocol = __constant_htons(ETH_P_MPLS_UC);
2665
2666 if (pkt_dev->vlan_id != 0xffff)
2667 protocol = __constant_htons(ETH_P_8021Q);
2668
2669 /* Update any of the values, used when we're incrementing various
2670 * fields.
2671 */
2672 mod_cur_headers(pkt_dev);
2673
2674 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16 +
2675 pkt_dev->nr_labels*sizeof(u32) +
2676 VLAN_TAG_SIZE(pkt_dev) + SVLAN_TAG_SIZE(pkt_dev),
2677 GFP_ATOMIC);
2678 if (!skb) {
2679 sprintf(pkt_dev->result, "No memory");
2680 return NULL;
2681 }
2682
2683 skb_reserve(skb, 16);
2684
2685 /* Reserve for ethernet and IP header */
2686 eth = (__u8 *) skb_push(skb, 14);
2687 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2688 if (pkt_dev->nr_labels)
2689 mpls_push(mpls, pkt_dev);
2690
2691 if (pkt_dev->vlan_id != 0xffff) {
2692 if(pkt_dev->svlan_id != 0xffff) {
2693 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2694 *svlan_tci = build_tci(pkt_dev->svlan_id,
2695 pkt_dev->svlan_cfi,
2696 pkt_dev->svlan_p);
2697 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2698 *svlan_encapsulated_proto = __constant_htons(ETH_P_8021Q);
2699 }
2700 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2701 *vlan_tci = build_tci(pkt_dev->vlan_id,
2702 pkt_dev->vlan_cfi,
2703 pkt_dev->vlan_p);
2704 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2705 *vlan_encapsulated_proto = __constant_htons(ETH_P_IPV6);
2706 }
2707
2708 iph = (struct ipv6hdr *)skb_put(skb, sizeof(struct ipv6hdr));
2709 udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
2710
2711 memcpy(eth, pkt_dev->hh, 12);
2712 *(__be16 *) & eth[12] = protocol;
2713
2714 /* Eth + IPh + UDPh + mpls */
2715 datalen = pkt_dev->cur_pkt_size - 14 -
2716 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2717 pkt_dev->nr_labels*sizeof(u32) - VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev);
2718
2719 if (datalen < sizeof(struct pktgen_hdr)) {
2720 datalen = sizeof(struct pktgen_hdr);
2721 if (net_ratelimit())
2722 printk(KERN_INFO "pktgen: increased datalen to %d\n",
2723 datalen);
2724 }
2725
2726 udph->source = htons(pkt_dev->cur_udp_src);
2727 udph->dest = htons(pkt_dev->cur_udp_dst);
2728 udph->len = htons(datalen + sizeof(struct udphdr));
2729 udph->check = 0; /* No checksum */
2730
2731 *(__be32 *) iph = __constant_htonl(0x60000000); /* Version + flow */
2732
2733 if (pkt_dev->traffic_class) {
2734 /* Version + traffic class + flow (0) */
2735 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2736 }
2737
2738 iph->hop_limit = 32;
2739
2740 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2741 iph->nexthdr = IPPROTO_UDP;
2742
2743 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2744 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2745
2746 skb->mac.raw = ((u8 *) iph) - 14 - pkt_dev->nr_labels*sizeof(u32) -
2747 VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev);
2748 skb->protocol = protocol;
2749 skb->dev = odev;
2750 skb->pkt_type = PACKET_HOST;
2751 skb->nh.ipv6h = iph;
2752 skb->h.uh = udph;
2753
2754 if (pkt_dev->nfrags <= 0)
2755 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2756 else {
2757 int frags = pkt_dev->nfrags;
2758 int i;
2759
2760 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2761
2762 if (frags > MAX_SKB_FRAGS)
2763 frags = MAX_SKB_FRAGS;
2764 if (datalen > frags * PAGE_SIZE) {
2765 skb_put(skb, datalen - frags * PAGE_SIZE);
2766 datalen = frags * PAGE_SIZE;
2767 }
2768
2769 i = 0;
2770 while (datalen > 0) {
2771 struct page *page = alloc_pages(GFP_KERNEL, 0);
2772 skb_shinfo(skb)->frags[i].page = page;
2773 skb_shinfo(skb)->frags[i].page_offset = 0;
2774 skb_shinfo(skb)->frags[i].size =
2775 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2776 datalen -= skb_shinfo(skb)->frags[i].size;
2777 skb->len += skb_shinfo(skb)->frags[i].size;
2778 skb->data_len += skb_shinfo(skb)->frags[i].size;
2779 i++;
2780 skb_shinfo(skb)->nr_frags = i;
2781 }
2782
2783 while (i < frags) {
2784 int rem;
2785
2786 if (i == 0)
2787 break;
2788
2789 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2790 if (rem == 0)
2791 break;
2792
2793 skb_shinfo(skb)->frags[i - 1].size -= rem;
2794
2795 skb_shinfo(skb)->frags[i] =
2796 skb_shinfo(skb)->frags[i - 1];
2797 get_page(skb_shinfo(skb)->frags[i].page);
2798 skb_shinfo(skb)->frags[i].page =
2799 skb_shinfo(skb)->frags[i - 1].page;
2800 skb_shinfo(skb)->frags[i].page_offset +=
2801 skb_shinfo(skb)->frags[i - 1].size;
2802 skb_shinfo(skb)->frags[i].size = rem;
2803 i++;
2804 skb_shinfo(skb)->nr_frags = i;
2805 }
2806 }
2807
2808 /* Stamp the time, and sequence number, convert them to network byte order */
2809 /* should we update cloned packets too ? */
2810 if (pgh) {
2811 struct timeval timestamp;
2812
2813 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2814 pgh->seq_num = htonl(pkt_dev->seq_num);
2815
2816 do_gettimeofday(&timestamp);
2817 pgh->tv_sec = htonl(timestamp.tv_sec);
2818 pgh->tv_usec = htonl(timestamp.tv_usec);
2819 }
2820 /* pkt_dev->seq_num++; FF: you really mean this? */
2821
2822 return skb;
2823 }
2824
2825 static inline struct sk_buff *fill_packet(struct net_device *odev,
2826 struct pktgen_dev *pkt_dev)
2827 {
2828 if (pkt_dev->flags & F_IPV6)
2829 return fill_packet_ipv6(odev, pkt_dev);
2830 else
2831 return fill_packet_ipv4(odev, pkt_dev);
2832 }
2833
2834 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2835 {
2836 pkt_dev->seq_num = 1;
2837 pkt_dev->idle_acc = 0;
2838 pkt_dev->sofar = 0;
2839 pkt_dev->tx_bytes = 0;
2840 pkt_dev->errors = 0;
2841 }
2842
2843 /* Set up structure for sending pkts, clear counters */
2844
2845 static void pktgen_run(struct pktgen_thread *t)
2846 {
2847 struct pktgen_dev *pkt_dev;
2848 int started = 0;
2849
2850 PG_DEBUG(printk("pktgen: entering pktgen_run. %p\n", t));
2851
2852 if_lock(t);
2853 list_for_each_entry(pkt_dev, &t->if_list, list) {
2854
2855 /*
2856 * setup odev and create initial packet.
2857 */
2858 pktgen_setup_inject(pkt_dev);
2859
2860 if (pkt_dev->odev) {
2861 pktgen_clear_counters(pkt_dev);
2862 pkt_dev->running = 1; /* Cranke yeself! */
2863 pkt_dev->skb = NULL;
2864 pkt_dev->started_at = getCurUs();
2865 pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */
2866 pkt_dev->next_tx_ns = 0;
2867
2868 strcpy(pkt_dev->result, "Starting");
2869 started++;
2870 } else
2871 strcpy(pkt_dev->result, "Error starting");
2872 }
2873 if_unlock(t);
2874 if (started)
2875 t->control &= ~(T_STOP);
2876 }
2877
2878 static void pktgen_stop_all_threads_ifs(void)
2879 {
2880 struct pktgen_thread *t;
2881
2882 PG_DEBUG(printk("pktgen: entering pktgen_stop_all_threads_ifs.\n"));
2883
2884 mutex_lock(&pktgen_thread_lock);
2885
2886 list_for_each_entry(t, &pktgen_threads, th_list)
2887 t->control |= T_STOP;
2888
2889 mutex_unlock(&pktgen_thread_lock);
2890 }
2891
2892 static int thread_is_running(struct pktgen_thread *t)
2893 {
2894 struct pktgen_dev *pkt_dev;
2895 int res = 0;
2896
2897 list_for_each_entry(pkt_dev, &t->if_list, list)
2898 if (pkt_dev->running) {
2899 res = 1;
2900 break;
2901 }
2902 return res;
2903 }
2904
2905 static int pktgen_wait_thread_run(struct pktgen_thread *t)
2906 {
2907 if_lock(t);
2908
2909 while (thread_is_running(t)) {
2910
2911 if_unlock(t);
2912
2913 msleep_interruptible(100);
2914
2915 if (signal_pending(current))
2916 goto signal;
2917 if_lock(t);
2918 }
2919 if_unlock(t);
2920 return 1;
2921 signal:
2922 return 0;
2923 }
2924
2925 static int pktgen_wait_all_threads_run(void)
2926 {
2927 struct pktgen_thread *t;
2928 int sig = 1;
2929
2930 mutex_lock(&pktgen_thread_lock);
2931
2932 list_for_each_entry(t, &pktgen_threads, th_list) {
2933 sig = pktgen_wait_thread_run(t);
2934 if (sig == 0)
2935 break;
2936 }
2937
2938 if (sig == 0)
2939 list_for_each_entry(t, &pktgen_threads, th_list)
2940 t->control |= (T_STOP);
2941
2942 mutex_unlock(&pktgen_thread_lock);
2943 return sig;
2944 }
2945
2946 static void pktgen_run_all_threads(void)
2947 {
2948 struct pktgen_thread *t;
2949
2950 PG_DEBUG(printk("pktgen: entering pktgen_run_all_threads.\n"));
2951
2952 mutex_lock(&pktgen_thread_lock);
2953
2954 list_for_each_entry(t, &pktgen_threads, th_list)
2955 t->control |= (T_RUN);
2956
2957 mutex_unlock(&pktgen_thread_lock);
2958
2959 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
2960
2961 pktgen_wait_all_threads_run();
2962 }
2963
2964 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
2965 {
2966 __u64 total_us, bps, mbps, pps, idle;
2967 char *p = pkt_dev->result;
2968
2969 total_us = pkt_dev->stopped_at - pkt_dev->started_at;
2970
2971 idle = pkt_dev->idle_acc;
2972
2973 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
2974 (unsigned long long)total_us,
2975 (unsigned long long)(total_us - idle),
2976 (unsigned long long)idle,
2977 (unsigned long long)pkt_dev->sofar,
2978 pkt_dev->cur_pkt_size, nr_frags);
2979
2980 pps = pkt_dev->sofar * USEC_PER_SEC;
2981
2982 while ((total_us >> 32) != 0) {
2983 pps >>= 1;
2984 total_us >>= 1;
2985 }
2986
2987 do_div(pps, total_us);
2988
2989 bps = pps * 8 * pkt_dev->cur_pkt_size;
2990
2991 mbps = bps;
2992 do_div(mbps, 1000000);
2993 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
2994 (unsigned long long)pps,
2995 (unsigned long long)mbps,
2996 (unsigned long long)bps,
2997 (unsigned long long)pkt_dev->errors);
2998 }
2999
3000 /* Set stopped-at timer, remove from running list, do counters & statistics */
3001
3002 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3003 {
3004 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3005
3006 if (!pkt_dev->running) {
3007 printk("pktgen: interface: %s is already stopped\n",
3008 pkt_dev->ifname);
3009 return -EINVAL;
3010 }
3011
3012 pkt_dev->stopped_at = getCurUs();
3013 pkt_dev->running = 0;
3014
3015 show_results(pkt_dev, nr_frags);
3016
3017 return 0;
3018 }
3019
3020 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3021 {
3022 struct pktgen_dev *pkt_dev, *best = NULL;
3023
3024 if_lock(t);
3025
3026 list_for_each_entry(pkt_dev, &t->if_list, list) {
3027 if (!pkt_dev->running)
3028 continue;
3029 if (best == NULL)
3030 best = pkt_dev;
3031 else if (pkt_dev->next_tx_us < best->next_tx_us)
3032 best = pkt_dev;
3033 }
3034 if_unlock(t);
3035 return best;
3036 }
3037
3038 static void pktgen_stop(struct pktgen_thread *t)
3039 {
3040 struct pktgen_dev *pkt_dev;
3041
3042 PG_DEBUG(printk("pktgen: entering pktgen_stop\n"));
3043
3044 if_lock(t);
3045
3046 list_for_each_entry(pkt_dev, &t->if_list, list) {
3047 pktgen_stop_device(pkt_dev);
3048 if (pkt_dev->skb)
3049 kfree_skb(pkt_dev->skb);
3050
3051 pkt_dev->skb = NULL;
3052 }
3053
3054 if_unlock(t);
3055 }
3056
3057 /*
3058 * one of our devices needs to be removed - find it
3059 * and remove it
3060 */
3061 static void pktgen_rem_one_if(struct pktgen_thread *t)
3062 {
3063 struct list_head *q, *n;
3064 struct pktgen_dev *cur;
3065
3066 PG_DEBUG(printk("pktgen: entering pktgen_rem_one_if\n"));
3067
3068 if_lock(t);
3069
3070 list_for_each_safe(q, n, &t->if_list) {
3071 cur = list_entry(q, struct pktgen_dev, list);
3072
3073 if (!cur->removal_mark)
3074 continue;
3075
3076 if (cur->skb)
3077 kfree_skb(cur->skb);
3078 cur->skb = NULL;
3079
3080 pktgen_remove_device(t, cur);
3081
3082 break;
3083 }
3084
3085 if_unlock(t);
3086 }
3087
3088 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3089 {
3090 struct list_head *q, *n;
3091 struct pktgen_dev *cur;
3092
3093 /* Remove all devices, free mem */
3094
3095 PG_DEBUG(printk("pktgen: entering pktgen_rem_all_ifs\n"));
3096 if_lock(t);
3097
3098 list_for_each_safe(q, n, &t->if_list) {
3099 cur = list_entry(q, struct pktgen_dev, list);
3100
3101 if (cur->skb)
3102 kfree_skb(cur->skb);
3103 cur->skb = NULL;
3104
3105 pktgen_remove_device(t, cur);
3106 }
3107
3108 if_unlock(t);
3109 }
3110
3111 static void pktgen_rem_thread(struct pktgen_thread *t)
3112 {
3113 /* Remove from the thread list */
3114
3115 remove_proc_entry(t->name, pg_proc_dir);
3116
3117 mutex_lock(&pktgen_thread_lock);
3118
3119 list_del(&t->th_list);
3120
3121 mutex_unlock(&pktgen_thread_lock);
3122 }
3123
3124 static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
3125 {
3126 struct net_device *odev = NULL;
3127 __u64 idle_start = 0;
3128 int ret;
3129
3130 odev = pkt_dev->odev;
3131
3132 if (pkt_dev->delay_us || pkt_dev->delay_ns) {
3133 u64 now;
3134
3135 now = getCurUs();
3136 if (now < pkt_dev->next_tx_us)
3137 spin(pkt_dev, pkt_dev->next_tx_us);
3138
3139 /* This is max DELAY, this has special meaning of
3140 * "never transmit"
3141 */
3142 if (pkt_dev->delay_us == 0x7FFFFFFF) {
3143 pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us;
3144 pkt_dev->next_tx_ns = pkt_dev->delay_ns;
3145 goto out;
3146 }
3147 }
3148
3149 if (netif_queue_stopped(odev) || need_resched()) {
3150 idle_start = getCurUs();
3151
3152 if (!netif_running(odev)) {
3153 pktgen_stop_device(pkt_dev);
3154 if (pkt_dev->skb)
3155 kfree_skb(pkt_dev->skb);
3156 pkt_dev->skb = NULL;
3157 goto out;
3158 }
3159 if (need_resched())
3160 schedule();
3161
3162 pkt_dev->idle_acc += getCurUs() - idle_start;
3163
3164 if (netif_queue_stopped(odev)) {
3165 pkt_dev->next_tx_us = getCurUs(); /* TODO */
3166 pkt_dev->next_tx_ns = 0;
3167 goto out; /* Try the next interface */
3168 }
3169 }
3170
3171 if (pkt_dev->last_ok || !pkt_dev->skb) {
3172 if ((++pkt_dev->clone_count >= pkt_dev->clone_skb)
3173 || (!pkt_dev->skb)) {
3174 /* build a new pkt */
3175 if (pkt_dev->skb)
3176 kfree_skb(pkt_dev->skb);
3177
3178 pkt_dev->skb = fill_packet(odev, pkt_dev);
3179 if (pkt_dev->skb == NULL) {
3180 printk("pktgen: ERROR: couldn't allocate skb in fill_packet.\n");
3181 schedule();
3182 pkt_dev->clone_count--; /* back out increment, OOM */
3183 goto out;
3184 }
3185 pkt_dev->allocated_skbs++;
3186 pkt_dev->clone_count = 0; /* reset counter */
3187 }
3188 }
3189
3190 netif_tx_lock_bh(odev);
3191 if (!netif_queue_stopped(odev)) {
3192
3193 atomic_inc(&(pkt_dev->skb->users));
3194 retry_now:
3195 ret = odev->hard_start_xmit(pkt_dev->skb, odev);
3196 if (likely(ret == NETDEV_TX_OK)) {
3197 pkt_dev->last_ok = 1;
3198 pkt_dev->sofar++;
3199 pkt_dev->seq_num++;
3200 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size;
3201
3202 } else if (ret == NETDEV_TX_LOCKED
3203 && (odev->features & NETIF_F_LLTX)) {
3204 cpu_relax();
3205 goto retry_now;
3206 } else { /* Retry it next time */
3207
3208 atomic_dec(&(pkt_dev->skb->users));
3209
3210 if (debug && net_ratelimit())
3211 printk(KERN_INFO "pktgen: Hard xmit error\n");
3212
3213 pkt_dev->errors++;
3214 pkt_dev->last_ok = 0;
3215 }
3216
3217 pkt_dev->next_tx_us = getCurUs();
3218 pkt_dev->next_tx_ns = 0;
3219
3220 pkt_dev->next_tx_us += pkt_dev->delay_us;
3221 pkt_dev->next_tx_ns += pkt_dev->delay_ns;
3222
3223 if (pkt_dev->next_tx_ns > 1000) {
3224 pkt_dev->next_tx_us++;
3225 pkt_dev->next_tx_ns -= 1000;
3226 }
3227 }
3228
3229 else { /* Retry it next time */
3230 pkt_dev->last_ok = 0;
3231 pkt_dev->next_tx_us = getCurUs(); /* TODO */
3232 pkt_dev->next_tx_ns = 0;
3233 }
3234
3235 netif_tx_unlock_bh(odev);
3236
3237 /* If pkt_dev->count is zero, then run forever */
3238 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3239 if (atomic_read(&(pkt_dev->skb->users)) != 1) {
3240 idle_start = getCurUs();
3241 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3242 if (signal_pending(current)) {
3243 break;
3244 }
3245 schedule();
3246 }
3247 pkt_dev->idle_acc += getCurUs() - idle_start;
3248 }
3249
3250 /* Done with this */
3251 pktgen_stop_device(pkt_dev);
3252 if (pkt_dev->skb)
3253 kfree_skb(pkt_dev->skb);
3254 pkt_dev->skb = NULL;
3255 }
3256 out:;
3257 }
3258
3259 /*
3260 * Main loop of the thread goes here
3261 */
3262
3263 static void pktgen_thread_worker(struct pktgen_thread *t)
3264 {
3265 DEFINE_WAIT(wait);
3266 struct pktgen_dev *pkt_dev = NULL;
3267 int cpu = t->cpu;
3268 sigset_t tmpsig;
3269 u32 max_before_softirq;
3270 u32 tx_since_softirq = 0;
3271
3272 daemonize("pktgen/%d", cpu);
3273
3274 /* Block all signals except SIGKILL, SIGSTOP and SIGTERM */
3275
3276 spin_lock_irq(&current->sighand->siglock);
3277 tmpsig = current->blocked;
3278 siginitsetinv(&current->blocked,
3279 sigmask(SIGKILL) | sigmask(SIGSTOP) | sigmask(SIGTERM));
3280
3281 recalc_sigpending();
3282 spin_unlock_irq(&current->sighand->siglock);
3283
3284 /* Migrate to the right CPU */
3285 set_cpus_allowed(current, cpumask_of_cpu(cpu));
3286 if (smp_processor_id() != cpu)
3287 BUG();
3288
3289 init_waitqueue_head(&t->queue);
3290
3291 t->control &= ~(T_TERMINATE);
3292 t->control &= ~(T_RUN);
3293 t->control &= ~(T_STOP);
3294 t->control &= ~(T_REMDEVALL);
3295 t->control &= ~(T_REMDEV);
3296
3297 t->pid = current->pid;
3298
3299 PG_DEBUG(printk("pktgen: starting pktgen/%d: pid=%d\n", cpu, current->pid));
3300
3301 max_before_softirq = t->max_before_softirq;
3302
3303 __set_current_state(TASK_INTERRUPTIBLE);
3304 mb();
3305
3306 while (1) {
3307
3308 __set_current_state(TASK_RUNNING);
3309
3310 /*
3311 * Get next dev to xmit -- if any.
3312 */
3313
3314 pkt_dev = next_to_run(t);
3315
3316 if (pkt_dev) {
3317
3318 pktgen_xmit(pkt_dev);
3319
3320 /*
3321 * We like to stay RUNNING but must also give
3322 * others fair share.
3323 */
3324
3325 tx_since_softirq += pkt_dev->last_ok;
3326
3327 if (tx_since_softirq > max_before_softirq) {
3328 if (local_softirq_pending())
3329 do_softirq();
3330 tx_since_softirq = 0;
3331 }
3332 } else {
3333 prepare_to_wait(&(t->queue), &wait, TASK_INTERRUPTIBLE);
3334 schedule_timeout(HZ / 10);
3335 finish_wait(&(t->queue), &wait);
3336 }
3337
3338 /*
3339 * Back from sleep, either due to the timeout or signal.
3340 * We check if we have any "posted" work for us.
3341 */
3342
3343 if (t->control & T_TERMINATE || signal_pending(current))
3344 /* we received a request to terminate ourself */
3345 break;
3346
3347 if (t->control & T_STOP) {
3348 pktgen_stop(t);
3349 t->control &= ~(T_STOP);
3350 }
3351
3352 if (t->control & T_RUN) {
3353 pktgen_run(t);
3354 t->control &= ~(T_RUN);
3355 }
3356
3357 if (t->control & T_REMDEVALL) {
3358 pktgen_rem_all_ifs(t);
3359 t->control &= ~(T_REMDEVALL);
3360 }
3361
3362 if (t->control & T_REMDEV) {
3363 pktgen_rem_one_if(t);
3364 t->control &= ~(T_REMDEV);
3365 }
3366
3367 if (need_resched())
3368 schedule();
3369 }
3370
3371 PG_DEBUG(printk("pktgen: %s stopping all device\n", t->name));
3372 pktgen_stop(t);
3373
3374 PG_DEBUG(printk("pktgen: %s removing all device\n", t->name));
3375 pktgen_rem_all_ifs(t);
3376
3377 PG_DEBUG(printk("pktgen: %s removing thread.\n", t->name));
3378 pktgen_rem_thread(t);
3379
3380 t->removed = 1;
3381 }
3382
3383 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3384 const char *ifname)
3385 {
3386 struct pktgen_dev *p, *pkt_dev = NULL;
3387 if_lock(t);
3388
3389 list_for_each_entry(p, &t->if_list, list)
3390 if (strncmp(p->ifname, ifname, IFNAMSIZ) == 0) {
3391 pkt_dev = p;
3392 break;
3393 }
3394
3395 if_unlock(t);
3396 PG_DEBUG(printk("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev));
3397 return pkt_dev;
3398 }
3399
3400 /*
3401 * Adds a dev at front of if_list.
3402 */
3403
3404 static int add_dev_to_thread(struct pktgen_thread *t,
3405 struct pktgen_dev *pkt_dev)
3406 {
3407 int rv = 0;
3408
3409 if_lock(t);
3410
3411 if (pkt_dev->pg_thread) {
3412 printk("pktgen: ERROR: already assigned to a thread.\n");
3413 rv = -EBUSY;
3414 goto out;
3415 }
3416
3417 list_add(&pkt_dev->list, &t->if_list);
3418 pkt_dev->pg_thread = t;
3419 pkt_dev->running = 0;
3420
3421 out:
3422 if_unlock(t);
3423 return rv;
3424 }
3425
3426 /* Called under thread lock */
3427
3428 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3429 {
3430 struct pktgen_dev *pkt_dev;
3431 struct proc_dir_entry *pe;
3432
3433 /* We don't allow a device to be on several threads */
3434
3435 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3436 if (pkt_dev) {
3437 printk("pktgen: ERROR: interface already used.\n");
3438 return -EBUSY;
3439 }
3440
3441 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
3442 if (!pkt_dev)
3443 return -ENOMEM;
3444
3445 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state));
3446 if (pkt_dev->flows == NULL) {
3447 kfree(pkt_dev);
3448 return -ENOMEM;
3449 }
3450 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3451
3452 pkt_dev->removal_mark = 0;
3453 pkt_dev->min_pkt_size = ETH_ZLEN;
3454 pkt_dev->max_pkt_size = ETH_ZLEN;
3455 pkt_dev->nfrags = 0;
3456 pkt_dev->clone_skb = pg_clone_skb_d;
3457 pkt_dev->delay_us = pg_delay_d / 1000;
3458 pkt_dev->delay_ns = pg_delay_d % 1000;
3459 pkt_dev->count = pg_count_d;
3460 pkt_dev->sofar = 0;
3461 pkt_dev->udp_src_min = 9; /* sink port */
3462 pkt_dev->udp_src_max = 9;
3463 pkt_dev->udp_dst_min = 9;
3464 pkt_dev->udp_dst_max = 9;
3465
3466 pkt_dev->vlan_p = 0;
3467 pkt_dev->vlan_cfi = 0;
3468 pkt_dev->vlan_id = 0xffff;
3469 pkt_dev->svlan_p = 0;
3470 pkt_dev->svlan_cfi = 0;
3471 pkt_dev->svlan_id = 0xffff;
3472
3473 strncpy(pkt_dev->ifname, ifname, IFNAMSIZ);
3474
3475 if (!pktgen_setup_dev(pkt_dev)) {
3476 printk("pktgen: ERROR: pktgen_setup_dev failed.\n");
3477 if (pkt_dev->flows)
3478 vfree(pkt_dev->flows);
3479 kfree(pkt_dev);
3480 return -ENODEV;
3481 }
3482
3483 pe = create_proc_entry(ifname, 0600, pg_proc_dir);
3484 if (!pe) {
3485 printk("pktgen: cannot create %s/%s procfs entry.\n",
3486 PG_PROC_DIR, ifname);
3487 if (pkt_dev->flows)
3488 vfree(pkt_dev->flows);
3489 kfree(pkt_dev);
3490 return -EINVAL;
3491 }
3492 pe->proc_fops = &pktgen_if_fops;
3493 pe->data = pkt_dev;
3494
3495 return add_dev_to_thread(t, pkt_dev);
3496 }
3497
3498 static struct pktgen_thread *__init pktgen_find_thread(const char *name)
3499 {
3500 struct pktgen_thread *t;
3501
3502 mutex_lock(&pktgen_thread_lock);
3503
3504 list_for_each_entry(t, &pktgen_threads, th_list)
3505 if (strcmp(t->name, name) == 0) {
3506 mutex_unlock(&pktgen_thread_lock);
3507 return t;
3508 }
3509
3510 mutex_unlock(&pktgen_thread_lock);
3511 return NULL;
3512 }
3513
3514 static int __init pktgen_create_thread(const char *name, int cpu)
3515 {
3516 int err;
3517 struct pktgen_thread *t = NULL;
3518 struct proc_dir_entry *pe;
3519
3520 if (strlen(name) > 31) {
3521 printk("pktgen: ERROR: Thread name cannot be more than 31 characters.\n");
3522 return -EINVAL;
3523 }
3524
3525 if (pktgen_find_thread(name)) {
3526 printk("pktgen: ERROR: thread: %s already exists\n", name);
3527 return -EINVAL;
3528 }
3529
3530 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL);
3531 if (!t) {
3532 printk("pktgen: ERROR: out of memory, can't create new thread.\n");
3533 return -ENOMEM;
3534 }
3535
3536 strcpy(t->name, name);
3537 spin_lock_init(&t->if_lock);
3538 t->cpu = cpu;
3539
3540 pe = create_proc_entry(t->name, 0600, pg_proc_dir);
3541 if (!pe) {
3542 printk("pktgen: cannot create %s/%s procfs entry.\n",
3543 PG_PROC_DIR, t->name);
3544 kfree(t);
3545 return -EINVAL;
3546 }
3547
3548 pe->proc_fops = &pktgen_thread_fops;
3549 pe->data = t;
3550
3551 INIT_LIST_HEAD(&t->if_list);
3552
3553 list_add_tail(&t->th_list, &pktgen_threads);
3554
3555 t->removed = 0;
3556
3557 err = kernel_thread((void *)pktgen_thread_worker, (void *)t,
3558 CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
3559 if (err < 0) {
3560 printk("pktgen: kernel_thread() failed for cpu %d\n", t->cpu);
3561 remove_proc_entry(t->name, pg_proc_dir);
3562 list_del(&t->th_list);
3563 kfree(t);
3564 return err;
3565 }
3566
3567 return 0;
3568 }
3569
3570 /*
3571 * Removes a device from the thread if_list.
3572 */
3573 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3574 struct pktgen_dev *pkt_dev)
3575 {
3576 struct list_head *q, *n;
3577 struct pktgen_dev *p;
3578
3579 list_for_each_safe(q, n, &t->if_list) {
3580 p = list_entry(q, struct pktgen_dev, list);
3581 if (p == pkt_dev)
3582 list_del(&p->list);
3583 }
3584 }
3585
3586 static int pktgen_remove_device(struct pktgen_thread *t,
3587 struct pktgen_dev *pkt_dev)
3588 {
3589
3590 PG_DEBUG(printk("pktgen: remove_device pkt_dev=%p\n", pkt_dev));
3591
3592 if (pkt_dev->running) {
3593 printk("pktgen:WARNING: trying to remove a running interface, stopping it now.\n");
3594 pktgen_stop_device(pkt_dev);
3595 }
3596
3597 /* Dis-associate from the interface */
3598
3599 if (pkt_dev->odev) {
3600 dev_put(pkt_dev->odev);
3601 pkt_dev->odev = NULL;
3602 }
3603
3604 /* And update the thread if_list */
3605
3606 _rem_dev_from_if_list(t, pkt_dev);
3607
3608 /* Clean up proc file system */
3609
3610 remove_proc_entry(pkt_dev->ifname, pg_proc_dir);
3611
3612 if (pkt_dev->flows)
3613 vfree(pkt_dev->flows);
3614 kfree(pkt_dev);
3615 return 0;
3616 }
3617
3618 static int __init pg_init(void)
3619 {
3620 int cpu;
3621 struct proc_dir_entry *pe;
3622
3623 printk(version);
3624
3625 pg_proc_dir = proc_mkdir(PG_PROC_DIR, proc_net);
3626 if (!pg_proc_dir)
3627 return -ENODEV;
3628 pg_proc_dir->owner = THIS_MODULE;
3629
3630 pe = create_proc_entry(PGCTRL, 0600, pg_proc_dir);
3631 if (pe == NULL) {
3632 printk("pktgen: ERROR: cannot create %s procfs entry.\n",
3633 PGCTRL);
3634 proc_net_remove(PG_PROC_DIR);
3635 return -EINVAL;
3636 }
3637
3638 pe->proc_fops = &pktgen_fops;
3639 pe->data = NULL;
3640
3641 /* Register us to receive netdevice events */
3642 register_netdevice_notifier(&pktgen_notifier_block);
3643
3644 for_each_online_cpu(cpu) {
3645 int err;
3646 char buf[30];
3647
3648 sprintf(buf, "kpktgend_%i", cpu);
3649 err = pktgen_create_thread(buf, cpu);
3650 if (err)
3651 printk("pktgen: WARNING: Cannot create thread for cpu %d (%d)\n",
3652 cpu, err);
3653 }
3654
3655 if (list_empty(&pktgen_threads)) {
3656 printk("pktgen: ERROR: Initialization failed for all threads\n");
3657 unregister_netdevice_notifier(&pktgen_notifier_block);
3658 remove_proc_entry(PGCTRL, pg_proc_dir);
3659 proc_net_remove(PG_PROC_DIR);
3660 return -ENODEV;
3661 }
3662
3663 return 0;
3664 }
3665
3666 static void __exit pg_cleanup(void)
3667 {
3668 struct pktgen_thread *t;
3669 struct list_head *q, *n;
3670 wait_queue_head_t queue;
3671 init_waitqueue_head(&queue);
3672
3673 /* Stop all interfaces & threads */
3674
3675 list_for_each_safe(q, n, &pktgen_threads) {
3676 t = list_entry(q, struct pktgen_thread, th_list);
3677 t->control |= (T_TERMINATE);
3678
3679 wait_event_interruptible_timeout(queue, (t->removed == 1), HZ);
3680 }
3681
3682 /* Un-register us from receiving netdevice events */
3683 unregister_netdevice_notifier(&pktgen_notifier_block);
3684
3685 /* Clean up proc file system */
3686 remove_proc_entry(PGCTRL, pg_proc_dir);
3687 proc_net_remove(PG_PROC_DIR);
3688 }
3689
3690 module_init(pg_init);
3691 module_exit(pg_cleanup);
3692
3693 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se");
3694 MODULE_DESCRIPTION("Packet Generator tool");
3695 MODULE_LICENSE("GPL");
3696 module_param(pg_count_d, int, 0);
3697 module_param(pg_delay_d, int, 0);
3698 module_param(pg_clone_skb_d, int, 0);
3699 module_param(debug, int, 0);
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