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[PARISC] irq_affinityp[] only available for SMP builds
[linux-2.6.22.y-op.git] / net / core / pktgen.c
blob7fc3e9e28c34c3353b3e48082916d4cb737ad5e8
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 #include <linux/sys.h>
111 #include <linux/types.h>
112 #include <linux/module.h>
113 #include <linux/moduleparam.h>
114 #include <linux/kernel.h>
115 #include <linux/smp_lock.h>
116 #include <linux/sched.h>
117 #include <linux/slab.h>
118 #include <linux/vmalloc.h>
119 #include <linux/sched.h>
120 #include <linux/unistd.h>
121 #include <linux/string.h>
122 #include <linux/ptrace.h>
123 #include <linux/errno.h>
124 #include <linux/ioport.h>
125 #include <linux/interrupt.h>
126 #include <linux/delay.h>
127 #include <linux/timer.h>
128 #include <linux/init.h>
129 #include <linux/skbuff.h>
130 #include <linux/netdevice.h>
131 #include <linux/inet.h>
132 #include <linux/inetdevice.h>
133 #include <linux/rtnetlink.h>
134 #include <linux/if_arp.h>
135 #include <linux/in.h>
136 #include <linux/ip.h>
137 #include <linux/ipv6.h>
138 #include <linux/udp.h>
139 #include <linux/proc_fs.h>
140 #include <linux/seq_file.h>
141 #include <linux/wait.h>
142 #include <net/checksum.h>
143 #include <net/ipv6.h>
144 #include <net/addrconf.h>
145 #include <asm/byteorder.h>
146 #include <linux/rcupdate.h>
147 #include <asm/bitops.h>
148 #include <asm/io.h>
149 #include <asm/dma.h>
150 #include <asm/uaccess.h>
151 #include <asm/div64.h> /* do_div */
152 #include <asm/timex.h>
153
154
155 #define VERSION "pktgen v2.63: Packet Generator for packet performance testing.\n"
156
157 /* #define PG_DEBUG(a) a */
158 #define PG_DEBUG(a)
159
160 /* The buckets are exponential in 'width' */
161 #define LAT_BUCKETS_MAX 32
162 #define IP_NAME_SZ 32
163
164 /* Device flag bits */
165 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
166 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
167 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
168 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
169 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
170 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
171 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
172 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
173
174 /* Thread control flag bits */
175 #define T_TERMINATE (1<<0)
176 #define T_STOP (1<<1) /* Stop run */
177 #define T_RUN (1<<2) /* Start run */
178 #define T_REMDEV (1<<3) /* Remove all devs */
179
180 /* Locks */
181 #define thread_lock() down(&pktgen_sem)
182 #define thread_unlock() up(&pktgen_sem)
183
184 /* If lock -- can be removed after some work */
185 #define if_lock(t) spin_lock(&(t->if_lock));
186 #define if_unlock(t) spin_unlock(&(t->if_lock));
187
188 /* Used to help with determining the pkts on receive */
189 #define PKTGEN_MAGIC 0xbe9be955
190 #define PG_PROC_DIR "pktgen"
191 #define PGCTRL "pgctrl"
192 static struct proc_dir_entry *pg_proc_dir = NULL;
193
194 #define MAX_CFLOWS 65536
195
196 struct flow_state
197 {
198 __u32 cur_daddr;
199 int count;
200 };
201
202 struct pktgen_dev {
203
204 /*
205 * Try to keep frequent/infrequent used vars. separated.
206 */
207
208 char ifname[IFNAMSIZ];
209 char result[512];
210
211 struct pktgen_thread* pg_thread; /* the owner */
212 struct pktgen_dev *next; /* Used for chaining in the thread's run-queue */
213
214 int running; /* if this changes to false, the test will stop */
215
216 /* If min != max, then we will either do a linear iteration, or
217 * we will do a random selection from within the range.
218 */
219 __u32 flags;
220
221 int min_pkt_size; /* = ETH_ZLEN; */
222 int max_pkt_size; /* = ETH_ZLEN; */
223 int nfrags;
224 __u32 delay_us; /* Default delay */
225 __u32 delay_ns;
226 __u64 count; /* Default No packets to send */
227 __u64 sofar; /* How many pkts we've sent so far */
228 __u64 tx_bytes; /* How many bytes we've transmitted */
229 __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */
230
231 /* runtime counters relating to clone_skb */
232 __u64 next_tx_us; /* timestamp of when to tx next */
233 __u32 next_tx_ns;
234
235 __u64 allocated_skbs;
236 __u32 clone_count;
237 int last_ok; /* Was last skb sent?
238 * Or a failed transmit of some sort? This will keep
239 * sequence numbers in order, for example.
240 */
241 __u64 started_at; /* micro-seconds */
242 __u64 stopped_at; /* micro-seconds */
243 __u64 idle_acc; /* micro-seconds */
244 __u32 seq_num;
245
246 int clone_skb; /* Use multiple SKBs during packet gen. If this number
247 * is greater than 1, then that many copies of the same
248 * packet will be sent before a new packet is allocated.
249 * For instance, if you want to send 1024 identical packets
250 * before creating a new packet, set clone_skb to 1024.
251 */
252
253 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
254 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
255 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
256 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
257
258 struct in6_addr in6_saddr;
259 struct in6_addr in6_daddr;
260 struct in6_addr cur_in6_daddr;
261 struct in6_addr cur_in6_saddr;
262 /* For ranges */
263 struct in6_addr min_in6_daddr;
264 struct in6_addr max_in6_daddr;
265 struct in6_addr min_in6_saddr;
266 struct in6_addr max_in6_saddr;
267
268 /* If we're doing ranges, random or incremental, then this
269 * defines the min/max for those ranges.
270 */
271 __u32 saddr_min; /* inclusive, source IP address */
272 __u32 saddr_max; /* exclusive, source IP address */
273 __u32 daddr_min; /* inclusive, dest IP address */
274 __u32 daddr_max; /* exclusive, dest IP address */
275
276 __u16 udp_src_min; /* inclusive, source UDP port */
277 __u16 udp_src_max; /* exclusive, source UDP port */
278 __u16 udp_dst_min; /* inclusive, dest UDP port */
279 __u16 udp_dst_max; /* exclusive, dest UDP port */
280
281 __u32 src_mac_count; /* How many MACs to iterate through */
282 __u32 dst_mac_count; /* How many MACs to iterate through */
283
284 unsigned char dst_mac[6];
285 unsigned char src_mac[6];
286
287 __u32 cur_dst_mac_offset;
288 __u32 cur_src_mac_offset;
289 __u32 cur_saddr;
290 __u32 cur_daddr;
291 __u16 cur_udp_dst;
292 __u16 cur_udp_src;
293 __u32 cur_pkt_size;
294
295 __u8 hh[14];
296 /* = {
297 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
298
299 We fill in SRC address later
300 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
301 0x08, 0x00
302 };
303 */
304 __u16 pad; /* pad out the hh struct to an even 16 bytes */
305
306 struct sk_buff* skb; /* skb we are to transmit next, mainly used for when we
307 * are transmitting the same one multiple times
308 */
309 struct net_device* odev; /* The out-going device. Note that the device should
310 * have it's pg_info pointer pointing back to this
311 * device. This will be set when the user specifies
312 * the out-going device name (not when the inject is
313 * started as it used to do.)
314 */
315 struct flow_state *flows;
316 unsigned cflows; /* Concurrent flows (config) */
317 unsigned lflow; /* Flow length (config) */
318 unsigned nflows; /* accumulated flows (stats) */
319 };
320
321 struct pktgen_hdr {
322 __u32 pgh_magic;
323 __u32 seq_num;
324 __u32 tv_sec;
325 __u32 tv_usec;
326 };
327
328 struct pktgen_thread {
329 spinlock_t if_lock;
330 struct pktgen_dev *if_list; /* All device here */
331 struct pktgen_thread* next;
332 char name[32];
333 char result[512];
334 u32 max_before_softirq; /* We'll call do_softirq to prevent starvation. */
335
336 /* Field for thread to receive "posted" events terminate, stop ifs etc.*/
337
338 u32 control;
339 int pid;
340 int cpu;
341
342 wait_queue_head_t queue;
343 };
344
345 #define REMOVE 1
346 #define FIND 0
347
348 /* This code works around the fact that do_div cannot handle two 64-bit
349 numbers, and regular 64-bit division doesn't work on x86 kernels.
350 --Ben
351 */
352
353 #define PG_DIV 0
354
355 /* This was emailed to LMKL by: Chris Caputo <ccaputo@alt.net>
356 * Function copied/adapted/optimized from:
357 *
358 * nemesis.sourceforge.net/browse/lib/static/intmath/ix86/intmath.c.html
359 *
360 * Copyright 1994, University of Cambridge Computer Laboratory
361 * All Rights Reserved.
362 *
363 */
364 static inline s64 divremdi3(s64 x, s64 y, int type)
365 {
366 u64 a = (x < 0) ? -x : x;
367 u64 b = (y < 0) ? -y : y;
368 u64 res = 0, d = 1;
369
370 if (b > 0) {
371 while (b < a) {
372 b <<= 1;
373 d <<= 1;
374 }
375 }
376
377 do {
378 if ( a >= b ) {
379 a -= b;
380 res += d;
381 }
382 b >>= 1;
383 d >>= 1;
384 }
385 while (d);
386
387 if (PG_DIV == type) {
388 return (((x ^ y) & (1ll<<63)) == 0) ? res : -(s64)res;
389 }
390 else {
391 return ((x & (1ll<<63)) == 0) ? a : -(s64)a;
392 }
393 }
394
395 /* End of hacks to deal with 64-bit math on x86 */
396
397 /** Convert to milliseconds */
398 static inline __u64 tv_to_ms(const struct timeval* tv)
399 {
400 __u64 ms = tv->tv_usec / 1000;
401 ms += (__u64)tv->tv_sec * (__u64)1000;
402 return ms;
403 }
404
405
406 /** Convert to micro-seconds */
407 static inline __u64 tv_to_us(const struct timeval* tv)
408 {
409 __u64 us = tv->tv_usec;
410 us += (__u64)tv->tv_sec * (__u64)1000000;
411 return us;
412 }
413
414 static inline __u64 pg_div(__u64 n, __u32 base) {
415 __u64 tmp = n;
416 do_div(tmp, base);
417 /* printk("pktgen: pg_div, n: %llu base: %d rv: %llu\n",
418 n, base, tmp); */
419 return tmp;
420 }
421
422 static inline __u64 pg_div64(__u64 n, __u64 base)
423 {
424 __u64 tmp = n;
425 /*
426 * How do we know if the architecture we are running on
427 * supports division with 64 bit base?
428 *
429 */
430 #if defined(__sparc_v9__) || defined(__powerpc64__) || defined(__alpha__) || defined(__x86_64__) || defined(__ia64__)
431
432 do_div(tmp, base);
433 #else
434 tmp = divremdi3(n, base, PG_DIV);
435 #endif
436 return tmp;
437 }
438
439 static inline u32 pktgen_random(void)
440 {
441 #if 0
442 __u32 n;
443 get_random_bytes(&n, 4);
444 return n;
445 #else
446 return net_random();
447 #endif
448 }
449
450 static inline __u64 getCurMs(void)
451 {
452 struct timeval tv;
453 do_gettimeofday(&tv);
454 return tv_to_ms(&tv);
455 }
456
457 static inline __u64 getCurUs(void)
458 {
459 struct timeval tv;
460 do_gettimeofday(&tv);
461 return tv_to_us(&tv);
462 }
463
464 static inline __u64 tv_diff(const struct timeval* a, const struct timeval* b)
465 {
466 return tv_to_us(a) - tv_to_us(b);
467 }
468
469
470 /* old include end */
471
472 static char version[] __initdata = VERSION;
473
474 static int pktgen_remove_device(struct pktgen_thread* t, struct pktgen_dev *i);
475 static int pktgen_add_device(struct pktgen_thread* t, const char* ifname);
476 static struct pktgen_thread* pktgen_find_thread(const char* name);
477 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread* t, const char* ifname);
478 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
479 static void pktgen_run_all_threads(void);
480 static void pktgen_stop_all_threads_ifs(void);
481 static int pktgen_stop_device(struct pktgen_dev *pkt_dev);
482 static void pktgen_stop(struct pktgen_thread* t);
483 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
484 static struct pktgen_dev *pktgen_NN_threads(const char* dev_name, int remove);
485 static unsigned int scan_ip6(const char *s,char ip[16]);
486 static unsigned int fmt_ip6(char *s,const char ip[16]);
487
488 /* Module parameters, defaults. */
489 static int pg_count_d = 1000; /* 1000 pkts by default */
490 static int pg_delay_d = 0;
491 static int pg_clone_skb_d = 0;
492 static int debug = 0;
493
494 static DECLARE_MUTEX(pktgen_sem);
495 static struct pktgen_thread *pktgen_threads = NULL;
496
497 static struct notifier_block pktgen_notifier_block = {
498 .notifier_call = pktgen_device_event,
499 };
500
501 /*
502 * /proc handling functions
503 *
504 */
505
506 static int pgctrl_show(struct seq_file *seq, void *v)
507 {
508 seq_puts(seq, VERSION);
509 return 0;
510 }
511
512 static ssize_t pgctrl_write(struct file* file,const char __user * buf,
513 size_t count, loff_t *ppos)
514 {
515 int err = 0;
516 char data[128];
517
518 if (!capable(CAP_NET_ADMIN)){
519 err = -EPERM;
520 goto out;
521 }
522
523 if (count > sizeof(data))
524 count = sizeof(data);
525
526 if (copy_from_user(data, buf, count)) {
527 err = -EFAULT;
528 goto out;
529 }
530 data[count-1] = 0; /* Make string */
531
532 if (!strcmp(data, "stop"))
533 pktgen_stop_all_threads_ifs();
534
535 else if (!strcmp(data, "start"))
536 pktgen_run_all_threads();
537
538 else
539 printk("pktgen: Unknown command: %s\n", data);
540
541 err = count;
542
543 out:
544 return err;
545 }
546
547 static int pgctrl_open(struct inode *inode, struct file *file)
548 {
549 return single_open(file, pgctrl_show, PDE(inode)->data);
550 }
551
552 static struct file_operations pktgen_fops = {
553 .owner = THIS_MODULE,
554 .open = pgctrl_open,
555 .read = seq_read,
556 .llseek = seq_lseek,
557 .write = pgctrl_write,
558 .release = single_release,
559 };
560
561 static int pktgen_if_show(struct seq_file *seq, void *v)
562 {
563 int i;
564 struct pktgen_dev *pkt_dev = seq->private;
565 __u64 sa;
566 __u64 stopped;
567 __u64 now = getCurUs();
568
569 seq_printf(seq, "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
570 (unsigned long long) pkt_dev->count,
571 pkt_dev->min_pkt_size, pkt_dev->max_pkt_size);
572
573 seq_printf(seq, " frags: %d delay: %u clone_skb: %d ifname: %s\n",
574 pkt_dev->nfrags, 1000*pkt_dev->delay_us+pkt_dev->delay_ns, pkt_dev->clone_skb, pkt_dev->ifname);
575
576 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, pkt_dev->lflow);
577
578
579 if(pkt_dev->flags & F_IPV6) {
580 char b1[128], b2[128], b3[128];
581 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
582 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
583 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
584 seq_printf(seq, " saddr: %s min_saddr: %s max_saddr: %s\n", b1, b2, b3);
585
586 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
587 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
588 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
589 seq_printf(seq, " daddr: %s min_daddr: %s max_daddr: %s\n", b1, b2, b3);
590
591 }
592 else
593 seq_printf(seq," dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n",
594 pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min, pkt_dev->src_max);
595
596 seq_puts(seq, " src_mac: ");
597
598 if ((pkt_dev->src_mac[0] == 0) &&
599 (pkt_dev->src_mac[1] == 0) &&
600 (pkt_dev->src_mac[2] == 0) &&
601 (pkt_dev->src_mac[3] == 0) &&
602 (pkt_dev->src_mac[4] == 0) &&
603 (pkt_dev->src_mac[5] == 0))
604
605 for (i = 0; i < 6; i++)
606 seq_printf(seq, "%02X%s", pkt_dev->odev->dev_addr[i], i == 5 ? " " : ":");
607
608 else
609 for (i = 0; i < 6; i++)
610 seq_printf(seq, "%02X%s", pkt_dev->src_mac[i], i == 5 ? " " : ":");
611
612 seq_printf(seq, "dst_mac: ");
613 for (i = 0; i < 6; i++)
614 seq_printf(seq, "%02X%s", pkt_dev->dst_mac[i], i == 5 ? "\n" : ":");
615
616 seq_printf(seq, " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n",
617 pkt_dev->udp_src_min, pkt_dev->udp_src_max, pkt_dev->udp_dst_min,
618 pkt_dev->udp_dst_max);
619
620 seq_printf(seq, " src_mac_count: %d dst_mac_count: %d \n Flags: ",
621 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
622
623
624 if (pkt_dev->flags & F_IPV6)
625 seq_printf(seq, "IPV6 ");
626
627 if (pkt_dev->flags & F_IPSRC_RND)
628 seq_printf(seq, "IPSRC_RND ");
629
630 if (pkt_dev->flags & F_IPDST_RND)
631 seq_printf(seq, "IPDST_RND ");
632
633 if (pkt_dev->flags & F_TXSIZE_RND)
634 seq_printf(seq, "TXSIZE_RND ");
635
636 if (pkt_dev->flags & F_UDPSRC_RND)
637 seq_printf(seq, "UDPSRC_RND ");
638
639 if (pkt_dev->flags & F_UDPDST_RND)
640 seq_printf(seq, "UDPDST_RND ");
641
642 if (pkt_dev->flags & F_MACSRC_RND)
643 seq_printf(seq, "MACSRC_RND ");
644
645 if (pkt_dev->flags & F_MACDST_RND)
646 seq_printf(seq, "MACDST_RND ");
647
648
649 seq_puts(seq, "\n");
650
651 sa = pkt_dev->started_at;
652 stopped = pkt_dev->stopped_at;
653 if (pkt_dev->running)
654 stopped = now; /* not really stopped, more like last-running-at */
655
656 seq_printf(seq, "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n",
657 (unsigned long long) pkt_dev->sofar,
658 (unsigned long long) pkt_dev->errors,
659 (unsigned long long) sa,
660 (unsigned long long) stopped,
661 (unsigned long long) pkt_dev->idle_acc);
662
663 seq_printf(seq, " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
664 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
665 pkt_dev->cur_src_mac_offset);
666
667 if(pkt_dev->flags & F_IPV6) {
668 char b1[128], b2[128];
669 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
670 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
671 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
672 }
673 else
674 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
675 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
676
677
678 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
679 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
680
681 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
682
683 if (pkt_dev->result[0])
684 seq_printf(seq, "Result: %s\n", pkt_dev->result);
685 else
686 seq_printf(seq, "Result: Idle\n");
687
688 return 0;
689 }
690
691
692 static int count_trail_chars(const char __user *user_buffer, unsigned int maxlen)
693 {
694 int i;
695
696 for (i = 0; i < maxlen; i++) {
697 char c;
698 if (get_user(c, &user_buffer[i]))
699 return -EFAULT;
700 switch (c) {
701 case '\"':
702 case '\n':
703 case '\r':
704 case '\t':
705 case ' ':
706 case '=':
707 break;
708 default:
709 goto done;
710 };
711 }
712 done:
713 return i;
714 }
715
716 static unsigned long num_arg(const char __user *user_buffer, unsigned long maxlen,
717 unsigned long *num)
718 {
719 int i = 0;
720 *num = 0;
721
722 for(; i < maxlen; i++) {
723 char c;
724 if (get_user(c, &user_buffer[i]))
725 return -EFAULT;
726 if ((c >= '0') && (c <= '9')) {
727 *num *= 10;
728 *num += c -'0';
729 } else
730 break;
731 }
732 return i;
733 }
734
735 static int strn_len(const char __user *user_buffer, unsigned int maxlen)
736 {
737 int i = 0;
738
739 for(; i < maxlen; i++) {
740 char c;
741 if (get_user(c, &user_buffer[i]))
742 return -EFAULT;
743 switch (c) {
744 case '\"':
745 case '\n':
746 case '\r':
747 case '\t':
748 case ' ':
749 goto done_str;
750 break;
751 default:
752 break;
753 };
754 }
755 done_str:
756
757 return i;
758 }
759
760 static ssize_t pktgen_if_write(struct file *file, const char __user *user_buffer,
761 size_t count, loff_t *offset)
762 {
763 struct seq_file *seq = (struct seq_file *) file->private_data;
764 struct pktgen_dev *pkt_dev = seq->private;
765 int i = 0, max, len;
766 char name[16], valstr[32];
767 unsigned long value = 0;
768 char* pg_result = NULL;
769 int tmp = 0;
770 char buf[128];
771
772 pg_result = &(pkt_dev->result[0]);
773
774 if (count < 1) {
775 printk("pktgen: wrong command format\n");
776 return -EINVAL;
777 }
778
779 max = count - i;
780 tmp = count_trail_chars(&user_buffer[i], max);
781 if (tmp < 0) {
782 printk("pktgen: illegal format\n");
783 return tmp;
784 }
785 i += tmp;
786
787 /* Read variable name */
788
789 len = strn_len(&user_buffer[i], sizeof(name) - 1);
790 if (len < 0) { return len; }
791 memset(name, 0, sizeof(name));
792 if (copy_from_user(name, &user_buffer[i], len) )
793 return -EFAULT;
794 i += len;
795
796 max = count -i;
797 len = count_trail_chars(&user_buffer[i], max);
798 if (len < 0)
799 return len;
800
801 i += len;
802
803 if (debug) {
804 char tb[count + 1];
805 if (copy_from_user(tb, user_buffer, count))
806 return -EFAULT;
807 tb[count] = 0;
808 printk("pktgen: %s,%lu buffer -:%s:-\n", name,
809 (unsigned long) count, tb);
810 }
811
812 if (!strcmp(name, "min_pkt_size")) {
813 len = num_arg(&user_buffer[i], 10, &value);
814 if (len < 0) { return len; }
815 i += len;
816 if (value < 14+20+8)
817 value = 14+20+8;
818 if (value != pkt_dev->min_pkt_size) {
819 pkt_dev->min_pkt_size = value;
820 pkt_dev->cur_pkt_size = value;
821 }
822 sprintf(pg_result, "OK: min_pkt_size=%u", pkt_dev->min_pkt_size);
823 return count;
824 }
825
826 if (!strcmp(name, "max_pkt_size")) {
827 len = num_arg(&user_buffer[i], 10, &value);
828 if (len < 0) { return len; }
829 i += len;
830 if (value < 14+20+8)
831 value = 14+20+8;
832 if (value != pkt_dev->max_pkt_size) {
833 pkt_dev->max_pkt_size = value;
834 pkt_dev->cur_pkt_size = value;
835 }
836 sprintf(pg_result, "OK: max_pkt_size=%u", pkt_dev->max_pkt_size);
837 return count;
838 }
839
840 /* Shortcut for min = max */
841
842 if (!strcmp(name, "pkt_size")) {
843 len = num_arg(&user_buffer[i], 10, &value);
844 if (len < 0) { return len; }
845 i += len;
846 if (value < 14+20+8)
847 value = 14+20+8;
848 if (value != pkt_dev->min_pkt_size) {
849 pkt_dev->min_pkt_size = value;
850 pkt_dev->max_pkt_size = value;
851 pkt_dev->cur_pkt_size = value;
852 }
853 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
854 return count;
855 }
856
857 if (!strcmp(name, "debug")) {
858 len = num_arg(&user_buffer[i], 10, &value);
859 if (len < 0) { return len; }
860 i += len;
861 debug = value;
862 sprintf(pg_result, "OK: debug=%u", debug);
863 return count;
864 }
865
866 if (!strcmp(name, "frags")) {
867 len = num_arg(&user_buffer[i], 10, &value);
868 if (len < 0) { return len; }
869 i += len;
870 pkt_dev->nfrags = value;
871 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
872 return count;
873 }
874 if (!strcmp(name, "delay")) {
875 len = num_arg(&user_buffer[i], 10, &value);
876 if (len < 0) { return len; }
877 i += len;
878 if (value == 0x7FFFFFFF) {
879 pkt_dev->delay_us = 0x7FFFFFFF;
880 pkt_dev->delay_ns = 0;
881 } else {
882 pkt_dev->delay_us = value / 1000;
883 pkt_dev->delay_ns = value % 1000;
884 }
885 sprintf(pg_result, "OK: delay=%u", 1000*pkt_dev->delay_us+pkt_dev->delay_ns);
886 return count;
887 }
888 if (!strcmp(name, "udp_src_min")) {
889 len = num_arg(&user_buffer[i], 10, &value);
890 if (len < 0) { return len; }
891 i += len;
892 if (value != pkt_dev->udp_src_min) {
893 pkt_dev->udp_src_min = value;
894 pkt_dev->cur_udp_src = value;
895 }
896 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
897 return count;
898 }
899 if (!strcmp(name, "udp_dst_min")) {
900 len = num_arg(&user_buffer[i], 10, &value);
901 if (len < 0) { return len; }
902 i += len;
903 if (value != pkt_dev->udp_dst_min) {
904 pkt_dev->udp_dst_min = value;
905 pkt_dev->cur_udp_dst = value;
906 }
907 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
908 return count;
909 }
910 if (!strcmp(name, "udp_src_max")) {
911 len = num_arg(&user_buffer[i], 10, &value);
912 if (len < 0) { return len; }
913 i += len;
914 if (value != pkt_dev->udp_src_max) {
915 pkt_dev->udp_src_max = value;
916 pkt_dev->cur_udp_src = value;
917 }
918 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
919 return count;
920 }
921 if (!strcmp(name, "udp_dst_max")) {
922 len = num_arg(&user_buffer[i], 10, &value);
923 if (len < 0) { return len; }
924 i += len;
925 if (value != pkt_dev->udp_dst_max) {
926 pkt_dev->udp_dst_max = value;
927 pkt_dev->cur_udp_dst = value;
928 }
929 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
930 return count;
931 }
932 if (!strcmp(name, "clone_skb")) {
933 len = num_arg(&user_buffer[i], 10, &value);
934 if (len < 0) { return len; }
935 i += len;
936 pkt_dev->clone_skb = value;
937
938 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
939 return count;
940 }
941 if (!strcmp(name, "count")) {
942 len = num_arg(&user_buffer[i], 10, &value);
943 if (len < 0) { return len; }
944 i += len;
945 pkt_dev->count = value;
946 sprintf(pg_result, "OK: count=%llu",
947 (unsigned long long) pkt_dev->count);
948 return count;
949 }
950 if (!strcmp(name, "src_mac_count")) {
951 len = num_arg(&user_buffer[i], 10, &value);
952 if (len < 0) { return len; }
953 i += len;
954 if (pkt_dev->src_mac_count != value) {
955 pkt_dev->src_mac_count = value;
956 pkt_dev->cur_src_mac_offset = 0;
957 }
958 sprintf(pg_result, "OK: src_mac_count=%d", pkt_dev->src_mac_count);
959 return count;
960 }
961 if (!strcmp(name, "dst_mac_count")) {
962 len = num_arg(&user_buffer[i], 10, &value);
963 if (len < 0) { return len; }
964 i += len;
965 if (pkt_dev->dst_mac_count != value) {
966 pkt_dev->dst_mac_count = value;
967 pkt_dev->cur_dst_mac_offset = 0;
968 }
969 sprintf(pg_result, "OK: dst_mac_count=%d", pkt_dev->dst_mac_count);
970 return count;
971 }
972 if (!strcmp(name, "flag")) {
973 char f[32];
974 memset(f, 0, 32);
975 len = strn_len(&user_buffer[i], sizeof(f) - 1);
976 if (len < 0) { return len; }
977 if (copy_from_user(f, &user_buffer[i], len))
978 return -EFAULT;
979 i += len;
980 if (strcmp(f, "IPSRC_RND") == 0)
981 pkt_dev->flags |= F_IPSRC_RND;
982
983 else if (strcmp(f, "!IPSRC_RND") == 0)
984 pkt_dev->flags &= ~F_IPSRC_RND;
985
986 else if (strcmp(f, "TXSIZE_RND") == 0)
987 pkt_dev->flags |= F_TXSIZE_RND;
988
989 else if (strcmp(f, "!TXSIZE_RND") == 0)
990 pkt_dev->flags &= ~F_TXSIZE_RND;
991
992 else if (strcmp(f, "IPDST_RND") == 0)
993 pkt_dev->flags |= F_IPDST_RND;
994
995 else if (strcmp(f, "!IPDST_RND") == 0)
996 pkt_dev->flags &= ~F_IPDST_RND;
997
998 else if (strcmp(f, "UDPSRC_RND") == 0)
999 pkt_dev->flags |= F_UDPSRC_RND;
1000
1001 else if (strcmp(f, "!UDPSRC_RND") == 0)
1002 pkt_dev->flags &= ~F_UDPSRC_RND;
1003
1004 else if (strcmp(f, "UDPDST_RND") == 0)
1005 pkt_dev->flags |= F_UDPDST_RND;
1006
1007 else if (strcmp(f, "!UDPDST_RND") == 0)
1008 pkt_dev->flags &= ~F_UDPDST_RND;
1009
1010 else if (strcmp(f, "MACSRC_RND") == 0)
1011 pkt_dev->flags |= F_MACSRC_RND;
1012
1013 else if (strcmp(f, "!MACSRC_RND") == 0)
1014 pkt_dev->flags &= ~F_MACSRC_RND;
1015
1016 else if (strcmp(f, "MACDST_RND") == 0)
1017 pkt_dev->flags |= F_MACDST_RND;
1018
1019 else if (strcmp(f, "!MACDST_RND") == 0)
1020 pkt_dev->flags &= ~F_MACDST_RND;
1021
1022 else {
1023 sprintf(pg_result, "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1024 f,
1025 "IPSRC_RND, IPDST_RND, TXSIZE_RND, UDPSRC_RND, UDPDST_RND, MACSRC_RND, MACDST_RND\n");
1026 return count;
1027 }
1028 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1029 return count;
1030 }
1031 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1032 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1033 if (len < 0) { return len; }
1034
1035 if (copy_from_user(buf, &user_buffer[i], len))
1036 return -EFAULT;
1037 buf[len] = 0;
1038 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1039 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1040 strncpy(pkt_dev->dst_min, buf, len);
1041 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1042 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1043 }
1044 if(debug)
1045 printk("pktgen: dst_min set to: %s\n", pkt_dev->dst_min);
1046 i += len;
1047 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1048 return count;
1049 }
1050 if (!strcmp(name, "dst_max")) {
1051 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1052 if (len < 0) { return len; }
1053
1054 if (copy_from_user(buf, &user_buffer[i], len))
1055 return -EFAULT;
1056
1057 buf[len] = 0;
1058 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1059 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1060 strncpy(pkt_dev->dst_max, buf, len);
1061 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1062 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1063 }
1064 if(debug)
1065 printk("pktgen: dst_max set to: %s\n", pkt_dev->dst_max);
1066 i += len;
1067 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1068 return count;
1069 }
1070 if (!strcmp(name, "dst6")) {
1071 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1072 if (len < 0) return len;
1073
1074 pkt_dev->flags |= F_IPV6;
1075
1076 if (copy_from_user(buf, &user_buffer[i], len))
1077 return -EFAULT;
1078 buf[len] = 0;
1079
1080 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1081 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1082
1083 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1084
1085 if(debug)
1086 printk("pktgen: dst6 set to: %s\n", buf);
1087
1088 i += len;
1089 sprintf(pg_result, "OK: dst6=%s", buf);
1090 return count;
1091 }
1092 if (!strcmp(name, "dst6_min")) {
1093 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1094 if (len < 0) return len;
1095
1096 pkt_dev->flags |= F_IPV6;
1097
1098 if (copy_from_user(buf, &user_buffer[i], len))
1099 return -EFAULT;
1100 buf[len] = 0;
1101
1102 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1103 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1104
1105 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->min_in6_daddr);
1106 if(debug)
1107 printk("pktgen: dst6_min set to: %s\n", buf);
1108
1109 i += len;
1110 sprintf(pg_result, "OK: dst6_min=%s", buf);
1111 return count;
1112 }
1113 if (!strcmp(name, "dst6_max")) {
1114 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1115 if (len < 0) return len;
1116
1117 pkt_dev->flags |= F_IPV6;
1118
1119 if (copy_from_user(buf, &user_buffer[i], len))
1120 return -EFAULT;
1121 buf[len] = 0;
1122
1123 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1124 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1125
1126 if(debug)
1127 printk("pktgen: dst6_max set to: %s\n", buf);
1128
1129 i += len;
1130 sprintf(pg_result, "OK: dst6_max=%s", buf);
1131 return count;
1132 }
1133 if (!strcmp(name, "src6")) {
1134 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1135 if (len < 0) return len;
1136
1137 pkt_dev->flags |= F_IPV6;
1138
1139 if (copy_from_user(buf, &user_buffer[i], len))
1140 return -EFAULT;
1141 buf[len] = 0;
1142
1143 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1144 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1145
1146 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1147
1148 if(debug)
1149 printk("pktgen: src6 set to: %s\n", buf);
1150
1151 i += len;
1152 sprintf(pg_result, "OK: src6=%s", buf);
1153 return count;
1154 }
1155 if (!strcmp(name, "src_min")) {
1156 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1157 if (len < 0) { return len; }
1158 if (copy_from_user(buf, &user_buffer[i], len))
1159 return -EFAULT;
1160 buf[len] = 0;
1161 if (strcmp(buf, pkt_dev->src_min) != 0) {
1162 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1163 strncpy(pkt_dev->src_min, buf, len);
1164 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1165 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1166 }
1167 if(debug)
1168 printk("pktgen: src_min set to: %s\n", pkt_dev->src_min);
1169 i += len;
1170 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1171 return count;
1172 }
1173 if (!strcmp(name, "src_max")) {
1174 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1175 if (len < 0) { return len; }
1176 if (copy_from_user(buf, &user_buffer[i], len))
1177 return -EFAULT;
1178 buf[len] = 0;
1179 if (strcmp(buf, pkt_dev->src_max) != 0) {
1180 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1181 strncpy(pkt_dev->src_max, buf, len);
1182 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1183 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1184 }
1185 if(debug)
1186 printk("pktgen: src_max set to: %s\n", pkt_dev->src_max);
1187 i += len;
1188 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1189 return count;
1190 }
1191 if (!strcmp(name, "dst_mac")) {
1192 char *v = valstr;
1193 unsigned char old_dmac[6];
1194 unsigned char *m = pkt_dev->dst_mac;
1195 memcpy(old_dmac, pkt_dev->dst_mac, 6);
1196
1197 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1198 if (len < 0) { return len; }
1199 memset(valstr, 0, sizeof(valstr));
1200 if( copy_from_user(valstr, &user_buffer[i], len))
1201 return -EFAULT;
1202 i += len;
1203
1204 for(*m = 0;*v && m < pkt_dev->dst_mac + 6; v++) {
1205 if (*v >= '0' && *v <= '9') {
1206 *m *= 16;
1207 *m += *v - '0';
1208 }
1209 if (*v >= 'A' && *v <= 'F') {
1210 *m *= 16;
1211 *m += *v - 'A' + 10;
1212 }
1213 if (*v >= 'a' && *v <= 'f') {
1214 *m *= 16;
1215 *m += *v - 'a' + 10;
1216 }
1217 if (*v == ':') {
1218 m++;
1219 *m = 0;
1220 }
1221 }
1222
1223 /* Set up Dest MAC */
1224 if (memcmp(old_dmac, pkt_dev->dst_mac, 6) != 0)
1225 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, 6);
1226
1227 sprintf(pg_result, "OK: dstmac");
1228 return count;
1229 }
1230 if (!strcmp(name, "src_mac")) {
1231 char *v = valstr;
1232 unsigned char *m = pkt_dev->src_mac;
1233
1234 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1235 if (len < 0) { return len; }
1236 memset(valstr, 0, sizeof(valstr));
1237 if( copy_from_user(valstr, &user_buffer[i], len))
1238 return -EFAULT;
1239 i += len;
1240
1241 for(*m = 0;*v && m < pkt_dev->src_mac + 6; v++) {
1242 if (*v >= '0' && *v <= '9') {
1243 *m *= 16;
1244 *m += *v - '0';
1245 }
1246 if (*v >= 'A' && *v <= 'F') {
1247 *m *= 16;
1248 *m += *v - 'A' + 10;
1249 }
1250 if (*v >= 'a' && *v <= 'f') {
1251 *m *= 16;
1252 *m += *v - 'a' + 10;
1253 }
1254 if (*v == ':') {
1255 m++;
1256 *m = 0;
1257 }
1258 }
1259
1260 sprintf(pg_result, "OK: srcmac");
1261 return count;
1262 }
1263
1264 if (!strcmp(name, "clear_counters")) {
1265 pktgen_clear_counters(pkt_dev);
1266 sprintf(pg_result, "OK: Clearing counters.\n");
1267 return count;
1268 }
1269
1270 if (!strcmp(name, "flows")) {
1271 len = num_arg(&user_buffer[i], 10, &value);
1272 if (len < 0) { return len; }
1273 i += len;
1274 if (value > MAX_CFLOWS)
1275 value = MAX_CFLOWS;
1276
1277 pkt_dev->cflows = value;
1278 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1279 return count;
1280 }
1281
1282 if (!strcmp(name, "flowlen")) {
1283 len = num_arg(&user_buffer[i], 10, &value);
1284 if (len < 0) { return len; }
1285 i += len;
1286 pkt_dev->lflow = value;
1287 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1288 return count;
1289 }
1290
1291 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1292 return -EINVAL;
1293 }
1294
1295 static int pktgen_if_open(struct inode *inode, struct file *file)
1296 {
1297 return single_open(file, pktgen_if_show, PDE(inode)->data);
1298 }
1299
1300 static struct file_operations pktgen_if_fops = {
1301 .owner = THIS_MODULE,
1302 .open = pktgen_if_open,
1303 .read = seq_read,
1304 .llseek = seq_lseek,
1305 .write = pktgen_if_write,
1306 .release = single_release,
1307 };
1308
1309 static int pktgen_thread_show(struct seq_file *seq, void *v)
1310 {
1311 struct pktgen_thread *t = seq->private;
1312 struct pktgen_dev *pkt_dev = NULL;
1313
1314 BUG_ON(!t);
1315
1316 seq_printf(seq, "Name: %s max_before_softirq: %d\n",
1317 t->name, t->max_before_softirq);
1318
1319 seq_printf(seq, "Running: ");
1320
1321 if_lock(t);
1322 for(pkt_dev = t->if_list;pkt_dev; pkt_dev = pkt_dev->next)
1323 if(pkt_dev->running)
1324 seq_printf(seq, "%s ", pkt_dev->ifname);
1325
1326 seq_printf(seq, "\nStopped: ");
1327
1328 for(pkt_dev = t->if_list;pkt_dev; pkt_dev = pkt_dev->next)
1329 if(!pkt_dev->running)
1330 seq_printf(seq, "%s ", pkt_dev->ifname);
1331
1332 if (t->result[0])
1333 seq_printf(seq, "\nResult: %s\n", t->result);
1334 else
1335 seq_printf(seq, "\nResult: NA\n");
1336
1337 if_unlock(t);
1338
1339 return 0;
1340 }
1341
1342 static ssize_t pktgen_thread_write(struct file *file,
1343 const char __user *user_buffer,
1344 size_t count, loff_t *offset)
1345 {
1346 struct seq_file *seq = (struct seq_file *) file->private_data;
1347 struct pktgen_thread *t = seq->private;
1348 int i = 0, max, len, ret;
1349 char name[40];
1350 char *pg_result;
1351 unsigned long value = 0;
1352
1353 if (count < 1) {
1354 // sprintf(pg_result, "Wrong command format");
1355 return -EINVAL;
1356 }
1357
1358 max = count - i;
1359 len = count_trail_chars(&user_buffer[i], max);
1360 if (len < 0)
1361 return len;
1362
1363 i += len;
1364
1365 /* Read variable name */
1366
1367 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1368 if (len < 0)
1369 return len;
1370
1371 memset(name, 0, sizeof(name));
1372 if (copy_from_user(name, &user_buffer[i], len))
1373 return -EFAULT;
1374 i += len;
1375
1376 max = count -i;
1377 len = count_trail_chars(&user_buffer[i], max);
1378 if (len < 0)
1379 return len;
1380
1381 i += len;
1382
1383 if (debug)
1384 printk("pktgen: t=%s, count=%lu\n", name,
1385 (unsigned long) count);
1386
1387 if(!t) {
1388 printk("pktgen: ERROR: No thread\n");
1389 ret = -EINVAL;
1390 goto out;
1391 }
1392
1393 pg_result = &(t->result[0]);
1394
1395 if (!strcmp(name, "add_device")) {
1396 char f[32];
1397 memset(f, 0, 32);
1398 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1399 if (len < 0) {
1400 ret = len;
1401 goto out;
1402 }
1403 if( copy_from_user(f, &user_buffer[i], len) )
1404 return -EFAULT;
1405 i += len;
1406 thread_lock();
1407 pktgen_add_device(t, f);
1408 thread_unlock();
1409 ret = count;
1410 sprintf(pg_result, "OK: add_device=%s", f);
1411 goto out;
1412 }
1413
1414 if (!strcmp(name, "rem_device_all")) {
1415 thread_lock();
1416 t->control |= T_REMDEV;
1417 thread_unlock();
1418 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1419 ret = count;
1420 sprintf(pg_result, "OK: rem_device_all");
1421 goto out;
1422 }
1423
1424 if (!strcmp(name, "max_before_softirq")) {
1425 len = num_arg(&user_buffer[i], 10, &value);
1426 thread_lock();
1427 t->max_before_softirq = value;
1428 thread_unlock();
1429 ret = count;
1430 sprintf(pg_result, "OK: max_before_softirq=%lu", value);
1431 goto out;
1432 }
1433
1434 ret = -EINVAL;
1435 out:
1436
1437 return ret;
1438 }
1439
1440 static int pktgen_thread_open(struct inode *inode, struct file *file)
1441 {
1442 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1443 }
1444
1445 static struct file_operations pktgen_thread_fops = {
1446 .owner = THIS_MODULE,
1447 .open = pktgen_thread_open,
1448 .read = seq_read,
1449 .llseek = seq_lseek,
1450 .write = pktgen_thread_write,
1451 .release = single_release,
1452 };
1453
1454 /* Think find or remove for NN */
1455 static struct pktgen_dev *__pktgen_NN_threads(const char* ifname, int remove)
1456 {
1457 struct pktgen_thread *t;
1458 struct pktgen_dev *pkt_dev = NULL;
1459
1460 t = pktgen_threads;
1461
1462 while (t) {
1463 pkt_dev = pktgen_find_dev(t, ifname);
1464 if (pkt_dev) {
1465 if(remove) {
1466 if_lock(t);
1467 pktgen_remove_device(t, pkt_dev);
1468 if_unlock(t);
1469 }
1470 break;
1471 }
1472 t = t->next;
1473 }
1474 return pkt_dev;
1475 }
1476
1477 static struct pktgen_dev *pktgen_NN_threads(const char* ifname, int remove)
1478 {
1479 struct pktgen_dev *pkt_dev = NULL;
1480 thread_lock();
1481 pkt_dev = __pktgen_NN_threads(ifname, remove);
1482 thread_unlock();
1483 return pkt_dev;
1484 }
1485
1486 static int pktgen_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
1487 {
1488 struct net_device *dev = (struct net_device *)(ptr);
1489
1490 /* It is OK that we do not hold the group lock right now,
1491 * as we run under the RTNL lock.
1492 */
1493
1494 switch (event) {
1495 case NETDEV_CHANGEADDR:
1496 case NETDEV_GOING_DOWN:
1497 case NETDEV_DOWN:
1498 case NETDEV_UP:
1499 /* Ignore for now */
1500 break;
1501
1502 case NETDEV_UNREGISTER:
1503 pktgen_NN_threads(dev->name, REMOVE);
1504 break;
1505 };
1506
1507 return NOTIFY_DONE;
1508 }
1509
1510 /* Associate pktgen_dev with a device. */
1511
1512 static struct net_device* pktgen_setup_dev(struct pktgen_dev *pkt_dev) {
1513 struct net_device *odev;
1514
1515 /* Clean old setups */
1516
1517 if (pkt_dev->odev) {
1518 dev_put(pkt_dev->odev);
1519 pkt_dev->odev = NULL;
1520 }
1521
1522 odev = dev_get_by_name(pkt_dev->ifname);
1523
1524 if (!odev) {
1525 printk("pktgen: no such netdevice: \"%s\"\n", pkt_dev->ifname);
1526 goto out;
1527 }
1528 if (odev->type != ARPHRD_ETHER) {
1529 printk("pktgen: not an ethernet device: \"%s\"\n", pkt_dev->ifname);
1530 goto out_put;
1531 }
1532 if (!netif_running(odev)) {
1533 printk("pktgen: device is down: \"%s\"\n", pkt_dev->ifname);
1534 goto out_put;
1535 }
1536 pkt_dev->odev = odev;
1537
1538 return pkt_dev->odev;
1539
1540 out_put:
1541 dev_put(odev);
1542 out:
1543 return NULL;
1544
1545 }
1546
1547 /* Read pkt_dev from the interface and set up internal pktgen_dev
1548 * structure to have the right information to create/send packets
1549 */
1550 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
1551 {
1552 /* Try once more, just in case it works now. */
1553 if (!pkt_dev->odev)
1554 pktgen_setup_dev(pkt_dev);
1555
1556 if (!pkt_dev->odev) {
1557 printk("pktgen: ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1558 sprintf(pkt_dev->result, "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1559 return;
1560 }
1561
1562 /* Default to the interface's mac if not explicitly set. */
1563
1564 if ((pkt_dev->src_mac[0] == 0) &&
1565 (pkt_dev->src_mac[1] == 0) &&
1566 (pkt_dev->src_mac[2] == 0) &&
1567 (pkt_dev->src_mac[3] == 0) &&
1568 (pkt_dev->src_mac[4] == 0) &&
1569 (pkt_dev->src_mac[5] == 0)) {
1570
1571 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, 6);
1572 }
1573 /* Set up Dest MAC */
1574 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, 6);
1575
1576 /* Set up pkt size */
1577 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
1578
1579 if(pkt_dev->flags & F_IPV6) {
1580 /*
1581 * Skip this automatic address setting until locks or functions
1582 * gets exported
1583 */
1584
1585 #ifdef NOTNOW
1586 int i, set = 0, err=1;
1587 struct inet6_dev *idev;
1588
1589 for(i=0; i< IN6_ADDR_HSIZE; i++)
1590 if(pkt_dev->cur_in6_saddr.s6_addr[i]) {
1591 set = 1;
1592 break;
1593 }
1594
1595 if(!set) {
1596
1597 /*
1598 * Use linklevel address if unconfigured.
1599 *
1600 * use ipv6_get_lladdr if/when it's get exported
1601 */
1602
1603
1604 read_lock(&addrconf_lock);
1605 if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) {
1606 struct inet6_ifaddr *ifp;
1607
1608 read_lock_bh(&idev->lock);
1609 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1610 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1611 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &ifp->addr);
1612 err = 0;
1613 break;
1614 }
1615 }
1616 read_unlock_bh(&idev->lock);
1617 }
1618 read_unlock(&addrconf_lock);
1619 if(err) printk("pktgen: ERROR: IPv6 link address not availble.\n");
1620 }
1621 #endif
1622 }
1623 else {
1624 pkt_dev->saddr_min = 0;
1625 pkt_dev->saddr_max = 0;
1626 if (strlen(pkt_dev->src_min) == 0) {
1627
1628 struct in_device *in_dev;
1629
1630 rcu_read_lock();
1631 in_dev = __in_dev_get_rcu(pkt_dev->odev);
1632 if (in_dev) {
1633 if (in_dev->ifa_list) {
1634 pkt_dev->saddr_min = in_dev->ifa_list->ifa_address;
1635 pkt_dev->saddr_max = pkt_dev->saddr_min;
1636 }
1637 }
1638 rcu_read_unlock();
1639 }
1640 else {
1641 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1642 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1643 }
1644
1645 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1646 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1647 }
1648 /* Initialize current values. */
1649 pkt_dev->cur_dst_mac_offset = 0;
1650 pkt_dev->cur_src_mac_offset = 0;
1651 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1652 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1653 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
1654 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
1655 pkt_dev->nflows = 0;
1656 }
1657
1658 static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us)
1659 {
1660 __u64 start;
1661 __u64 now;
1662
1663 start = now = getCurUs();
1664 printk(KERN_INFO "sleeping for %d\n", (int)(spin_until_us - now));
1665 while (now < spin_until_us) {
1666 /* TODO: optimize sleeping behavior */
1667 if (spin_until_us - now > jiffies_to_usecs(1)+1)
1668 schedule_timeout_interruptible(1);
1669 else if (spin_until_us - now > 100) {
1670 do_softirq();
1671 if (!pkt_dev->running)
1672 return;
1673 if (need_resched())
1674 schedule();
1675 }
1676
1677 now = getCurUs();
1678 }
1679
1680 pkt_dev->idle_acc += now - start;
1681 }
1682
1683
1684 /* Increment/randomize headers according to flags and current values
1685 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
1686 */
1687 static void mod_cur_headers(struct pktgen_dev *pkt_dev) {
1688 __u32 imn;
1689 __u32 imx;
1690 int flow = 0;
1691
1692 if(pkt_dev->cflows) {
1693 flow = pktgen_random() % pkt_dev->cflows;
1694
1695 if (pkt_dev->flows[flow].count > pkt_dev->lflow)
1696 pkt_dev->flows[flow].count = 0;
1697 }
1698
1699
1700 /* Deal with source MAC */
1701 if (pkt_dev->src_mac_count > 1) {
1702 __u32 mc;
1703 __u32 tmp;
1704
1705 if (pkt_dev->flags & F_MACSRC_RND)
1706 mc = pktgen_random() % (pkt_dev->src_mac_count);
1707 else {
1708 mc = pkt_dev->cur_src_mac_offset++;
1709 if (pkt_dev->cur_src_mac_offset > pkt_dev->src_mac_count)
1710 pkt_dev->cur_src_mac_offset = 0;
1711 }
1712
1713 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
1714 pkt_dev->hh[11] = tmp;
1715 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
1716 pkt_dev->hh[10] = tmp;
1717 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
1718 pkt_dev->hh[9] = tmp;
1719 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
1720 pkt_dev->hh[8] = tmp;
1721 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
1722 pkt_dev->hh[7] = tmp;
1723 }
1724
1725 /* Deal with Destination MAC */
1726 if (pkt_dev->dst_mac_count > 1) {
1727 __u32 mc;
1728 __u32 tmp;
1729
1730 if (pkt_dev->flags & F_MACDST_RND)
1731 mc = pktgen_random() % (pkt_dev->dst_mac_count);
1732
1733 else {
1734 mc = pkt_dev->cur_dst_mac_offset++;
1735 if (pkt_dev->cur_dst_mac_offset > pkt_dev->dst_mac_count) {
1736 pkt_dev->cur_dst_mac_offset = 0;
1737 }
1738 }
1739
1740 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
1741 pkt_dev->hh[5] = tmp;
1742 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
1743 pkt_dev->hh[4] = tmp;
1744 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
1745 pkt_dev->hh[3] = tmp;
1746 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
1747 pkt_dev->hh[2] = tmp;
1748 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
1749 pkt_dev->hh[1] = tmp;
1750 }
1751
1752 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
1753 if (pkt_dev->flags & F_UDPSRC_RND)
1754 pkt_dev->cur_udp_src = ((pktgen_random() % (pkt_dev->udp_src_max - pkt_dev->udp_src_min)) + pkt_dev->udp_src_min);
1755
1756 else {
1757 pkt_dev->cur_udp_src++;
1758 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
1759 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
1760 }
1761 }
1762
1763 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
1764 if (pkt_dev->flags & F_UDPDST_RND) {
1765 pkt_dev->cur_udp_dst = ((pktgen_random() % (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)) + pkt_dev->udp_dst_min);
1766 }
1767 else {
1768 pkt_dev->cur_udp_dst++;
1769 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
1770 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
1771 }
1772 }
1773
1774 if (!(pkt_dev->flags & F_IPV6)) {
1775
1776 if ((imn = ntohl(pkt_dev->saddr_min)) < (imx = ntohl(pkt_dev->saddr_max))) {
1777 __u32 t;
1778 if (pkt_dev->flags & F_IPSRC_RND)
1779 t = ((pktgen_random() % (imx - imn)) + imn);
1780 else {
1781 t = ntohl(pkt_dev->cur_saddr);
1782 t++;
1783 if (t > imx) {
1784 t = imn;
1785 }
1786 }
1787 pkt_dev->cur_saddr = htonl(t);
1788 }
1789
1790 if (pkt_dev->cflows && pkt_dev->flows[flow].count != 0) {
1791 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
1792 } else {
1793
1794 if ((imn = ntohl(pkt_dev->daddr_min)) < (imx = ntohl(pkt_dev->daddr_max))) {
1795 __u32 t;
1796 if (pkt_dev->flags & F_IPDST_RND) {
1797
1798 t = ((pktgen_random() % (imx - imn)) + imn);
1799 t = htonl(t);
1800
1801 while( LOOPBACK(t) || MULTICAST(t) || BADCLASS(t) || ZERONET(t) || LOCAL_MCAST(t) ) {
1802 t = ((pktgen_random() % (imx - imn)) + imn);
1803 t = htonl(t);
1804 }
1805 pkt_dev->cur_daddr = t;
1806 }
1807
1808 else {
1809 t = ntohl(pkt_dev->cur_daddr);
1810 t++;
1811 if (t > imx) {
1812 t = imn;
1813 }
1814 pkt_dev->cur_daddr = htonl(t);
1815 }
1816 }
1817 if(pkt_dev->cflows) {
1818 pkt_dev->flows[flow].cur_daddr = pkt_dev->cur_daddr;
1819 pkt_dev->nflows++;
1820 }
1821 }
1822 }
1823 else /* IPV6 * */
1824 {
1825 if(pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
1826 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
1827 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
1828 pkt_dev->min_in6_daddr.s6_addr32[3] == 0);
1829 else {
1830 int i;
1831
1832 /* Only random destinations yet */
1833
1834 for(i=0; i < 4; i++) {
1835 pkt_dev->cur_in6_daddr.s6_addr32[i] =
1836 ((pktgen_random() |
1837 pkt_dev->min_in6_daddr.s6_addr32[i]) &
1838 pkt_dev->max_in6_daddr.s6_addr32[i]);
1839 }
1840 }
1841 }
1842
1843 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
1844 __u32 t;
1845 if (pkt_dev->flags & F_TXSIZE_RND) {
1846 t = ((pktgen_random() % (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size))
1847 + pkt_dev->min_pkt_size);
1848 }
1849 else {
1850 t = pkt_dev->cur_pkt_size + 1;
1851 if (t > pkt_dev->max_pkt_size)
1852 t = pkt_dev->min_pkt_size;
1853 }
1854 pkt_dev->cur_pkt_size = t;
1855 }
1856
1857 pkt_dev->flows[flow].count++;
1858 }
1859
1860
1861 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
1862 struct pktgen_dev *pkt_dev)
1863 {
1864 struct sk_buff *skb = NULL;
1865 __u8 *eth;
1866 struct udphdr *udph;
1867 int datalen, iplen;
1868 struct iphdr *iph;
1869 struct pktgen_hdr *pgh = NULL;
1870
1871 /* Update any of the values, used when we're incrementing various
1872 * fields.
1873 */
1874 mod_cur_headers(pkt_dev);
1875
1876 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16, GFP_ATOMIC);
1877 if (!skb) {
1878 sprintf(pkt_dev->result, "No memory");
1879 return NULL;
1880 }
1881
1882 skb_reserve(skb, 16);
1883
1884 /* Reserve for ethernet and IP header */
1885 eth = (__u8 *) skb_push(skb, 14);
1886 iph = (struct iphdr *)skb_put(skb, sizeof(struct iphdr));
1887 udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
1888
1889 memcpy(eth, pkt_dev->hh, 12);
1890 *(u16*)&eth[12] = __constant_htons(ETH_P_IP);
1891
1892 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8; /* Eth + IPh + UDPh */
1893 if (datalen < sizeof(struct pktgen_hdr))
1894 datalen = sizeof(struct pktgen_hdr);
1895
1896 udph->source = htons(pkt_dev->cur_udp_src);
1897 udph->dest = htons(pkt_dev->cur_udp_dst);
1898 udph->len = htons(datalen + 8); /* DATA + udphdr */
1899 udph->check = 0; /* No checksum */
1900
1901 iph->ihl = 5;
1902 iph->version = 4;
1903 iph->ttl = 32;
1904 iph->tos = 0;
1905 iph->protocol = IPPROTO_UDP; /* UDP */
1906 iph->saddr = pkt_dev->cur_saddr;
1907 iph->daddr = pkt_dev->cur_daddr;
1908 iph->frag_off = 0;
1909 iplen = 20 + 8 + datalen;
1910 iph->tot_len = htons(iplen);
1911 iph->check = 0;
1912 iph->check = ip_fast_csum((void *) iph, iph->ihl);
1913 skb->protocol = __constant_htons(ETH_P_IP);
1914 skb->mac.raw = ((u8 *)iph) - 14;
1915 skb->dev = odev;
1916 skb->pkt_type = PACKET_HOST;
1917
1918 if (pkt_dev->nfrags <= 0)
1919 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
1920 else {
1921 int frags = pkt_dev->nfrags;
1922 int i;
1923
1924 pgh = (struct pktgen_hdr*)(((char*)(udph)) + 8);
1925
1926 if (frags > MAX_SKB_FRAGS)
1927 frags = MAX_SKB_FRAGS;
1928 if (datalen > frags*PAGE_SIZE) {
1929 skb_put(skb, datalen-frags*PAGE_SIZE);
1930 datalen = frags*PAGE_SIZE;
1931 }
1932
1933 i = 0;
1934 while (datalen > 0) {
1935 struct page *page = alloc_pages(GFP_KERNEL, 0);
1936 skb_shinfo(skb)->frags[i].page = page;
1937 skb_shinfo(skb)->frags[i].page_offset = 0;
1938 skb_shinfo(skb)->frags[i].size =
1939 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
1940 datalen -= skb_shinfo(skb)->frags[i].size;
1941 skb->len += skb_shinfo(skb)->frags[i].size;
1942 skb->data_len += skb_shinfo(skb)->frags[i].size;
1943 i++;
1944 skb_shinfo(skb)->nr_frags = i;
1945 }
1946
1947 while (i < frags) {
1948 int rem;
1949
1950 if (i == 0)
1951 break;
1952
1953 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
1954 if (rem == 0)
1955 break;
1956
1957 skb_shinfo(skb)->frags[i - 1].size -= rem;
1958
1959 skb_shinfo(skb)->frags[i] = skb_shinfo(skb)->frags[i - 1];
1960 get_page(skb_shinfo(skb)->frags[i].page);
1961 skb_shinfo(skb)->frags[i].page = skb_shinfo(skb)->frags[i - 1].page;
1962 skb_shinfo(skb)->frags[i].page_offset += skb_shinfo(skb)->frags[i - 1].size;
1963 skb_shinfo(skb)->frags[i].size = rem;
1964 i++;
1965 skb_shinfo(skb)->nr_frags = i;
1966 }
1967 }
1968
1969 /* Stamp the time, and sequence number, convert them to network byte order */
1970
1971 if (pgh) {
1972 struct timeval timestamp;
1973
1974 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
1975 pgh->seq_num = htonl(pkt_dev->seq_num);
1976
1977 do_gettimeofday(&timestamp);
1978 pgh->tv_sec = htonl(timestamp.tv_sec);
1979 pgh->tv_usec = htonl(timestamp.tv_usec);
1980 }
1981 pkt_dev->seq_num++;
1982
1983 return skb;
1984 }
1985
1986 /*
1987 * scan_ip6, fmt_ip taken from dietlibc-0.21
1988 * Author Felix von Leitner <felix-dietlibc@fefe.de>
1989 *
1990 * Slightly modified for kernel.
1991 * Should be candidate for net/ipv4/utils.c
1992 * --ro
1993 */
1994
1995 static unsigned int scan_ip6(const char *s,char ip[16])
1996 {
1997 unsigned int i;
1998 unsigned int len=0;
1999 unsigned long u;
2000 char suffix[16];
2001 unsigned int prefixlen=0;
2002 unsigned int suffixlen=0;
2003 __u32 tmp;
2004
2005 for (i=0; i<16; i++) ip[i]=0;
2006
2007 for (;;) {
2008 if (*s == ':') {
2009 len++;
2010 if (s[1] == ':') { /* Found "::", skip to part 2 */
2011 s+=2;
2012 len++;
2013 break;
2014 }
2015 s++;
2016 }
2017 {
2018 char *tmp;
2019 u=simple_strtoul(s,&tmp,16);
2020 i=tmp-s;
2021 }
2022
2023 if (!i) return 0;
2024 if (prefixlen==12 && s[i]=='.') {
2025
2026 /* the last 4 bytes may be written as IPv4 address */
2027
2028 tmp = in_aton(s);
2029 memcpy((struct in_addr*)(ip+12), &tmp, sizeof(tmp));
2030 return i+len;
2031 }
2032 ip[prefixlen++] = (u >> 8);
2033 ip[prefixlen++] = (u & 255);
2034 s += i; len += i;
2035 if (prefixlen==16)
2036 return len;
2037 }
2038
2039 /* part 2, after "::" */
2040 for (;;) {
2041 if (*s == ':') {
2042 if (suffixlen==0)
2043 break;
2044 s++;
2045 len++;
2046 } else if (suffixlen!=0)
2047 break;
2048 {
2049 char *tmp;
2050 u=simple_strtol(s,&tmp,16);
2051 i=tmp-s;
2052 }
2053 if (!i) {
2054 if (*s) len--;
2055 break;
2056 }
2057 if (suffixlen+prefixlen<=12 && s[i]=='.') {
2058 tmp = in_aton(s);
2059 memcpy((struct in_addr*)(suffix+suffixlen), &tmp, sizeof(tmp));
2060 suffixlen+=4;
2061 len+=strlen(s);
2062 break;
2063 }
2064 suffix[suffixlen++] = (u >> 8);
2065 suffix[suffixlen++] = (u & 255);
2066 s += i; len += i;
2067 if (prefixlen+suffixlen==16)
2068 break;
2069 }
2070 for (i=0; i<suffixlen; i++)
2071 ip[16-suffixlen+i] = suffix[i];
2072 return len;
2073 }
2074
2075 static char tohex(char hexdigit) {
2076 return hexdigit>9?hexdigit+'a'-10:hexdigit+'0';
2077 }
2078
2079 static int fmt_xlong(char* s,unsigned int i) {
2080 char* bak=s;
2081 *s=tohex((i>>12)&0xf); if (s!=bak || *s!='0') ++s;
2082 *s=tohex((i>>8)&0xf); if (s!=bak || *s!='0') ++s;
2083 *s=tohex((i>>4)&0xf); if (s!=bak || *s!='0') ++s;
2084 *s=tohex(i&0xf);
2085 return s-bak+1;
2086 }
2087
2088 static unsigned int fmt_ip6(char *s,const char ip[16]) {
2089 unsigned int len;
2090 unsigned int i;
2091 unsigned int temp;
2092 unsigned int compressing;
2093 int j;
2094
2095 len = 0; compressing = 0;
2096 for (j=0; j<16; j+=2) {
2097
2098 #ifdef V4MAPPEDPREFIX
2099 if (j==12 && !memcmp(ip,V4mappedprefix,12)) {
2100 inet_ntoa_r(*(struct in_addr*)(ip+12),s);
2101 temp=strlen(s);
2102 return len+temp;
2103 }
2104 #endif
2105 temp = ((unsigned long) (unsigned char) ip[j] << 8) +
2106 (unsigned long) (unsigned char) ip[j+1];
2107 if (temp == 0) {
2108 if (!compressing) {
2109 compressing=1;
2110 if (j==0) {
2111 *s++=':'; ++len;
2112 }
2113 }
2114 } else {
2115 if (compressing) {
2116 compressing=0;
2117 *s++=':'; ++len;
2118 }
2119 i = fmt_xlong(s,temp); len += i; s += i;
2120 if (j<14) {
2121 *s++ = ':';
2122 ++len;
2123 }
2124 }
2125 }
2126 if (compressing) {
2127 *s++=':'; ++len;
2128 }
2129 *s=0;
2130 return len;
2131 }
2132
2133 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2134 struct pktgen_dev *pkt_dev)
2135 {
2136 struct sk_buff *skb = NULL;
2137 __u8 *eth;
2138 struct udphdr *udph;
2139 int datalen;
2140 struct ipv6hdr *iph;
2141 struct pktgen_hdr *pgh = NULL;
2142
2143 /* Update any of the values, used when we're incrementing various
2144 * fields.
2145 */
2146 mod_cur_headers(pkt_dev);
2147
2148 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16, GFP_ATOMIC);
2149 if (!skb) {
2150 sprintf(pkt_dev->result, "No memory");
2151 return NULL;
2152 }
2153
2154 skb_reserve(skb, 16);
2155
2156 /* Reserve for ethernet and IP header */
2157 eth = (__u8 *) skb_push(skb, 14);
2158 iph = (struct ipv6hdr *)skb_put(skb, sizeof(struct ipv6hdr));
2159 udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
2160
2161 memcpy(eth, pkt_dev->hh, 12);
2162 *(u16*)&eth[12] = __constant_htons(ETH_P_IPV6);
2163
2164 datalen = pkt_dev->cur_pkt_size-14-
2165 sizeof(struct ipv6hdr)-sizeof(struct udphdr); /* Eth + IPh + UDPh */
2166
2167 if (datalen < sizeof(struct pktgen_hdr)) {
2168 datalen = sizeof(struct pktgen_hdr);
2169 if (net_ratelimit())
2170 printk(KERN_INFO "pktgen: increased datalen to %d\n", datalen);
2171 }
2172
2173 udph->source = htons(pkt_dev->cur_udp_src);
2174 udph->dest = htons(pkt_dev->cur_udp_dst);
2175 udph->len = htons(datalen + sizeof(struct udphdr));
2176 udph->check = 0; /* No checksum */
2177
2178 *(u32*)iph = __constant_htonl(0x60000000); /* Version + flow */
2179
2180 iph->hop_limit = 32;
2181
2182 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2183 iph->nexthdr = IPPROTO_UDP;
2184
2185 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2186 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2187
2188 skb->mac.raw = ((u8 *)iph) - 14;
2189 skb->protocol = __constant_htons(ETH_P_IPV6);
2190 skb->dev = odev;
2191 skb->pkt_type = PACKET_HOST;
2192
2193 if (pkt_dev->nfrags <= 0)
2194 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2195 else {
2196 int frags = pkt_dev->nfrags;
2197 int i;
2198
2199 pgh = (struct pktgen_hdr*)(((char*)(udph)) + 8);
2200
2201 if (frags > MAX_SKB_FRAGS)
2202 frags = MAX_SKB_FRAGS;
2203 if (datalen > frags*PAGE_SIZE) {
2204 skb_put(skb, datalen-frags*PAGE_SIZE);
2205 datalen = frags*PAGE_SIZE;
2206 }
2207
2208 i = 0;
2209 while (datalen > 0) {
2210 struct page *page = alloc_pages(GFP_KERNEL, 0);
2211 skb_shinfo(skb)->frags[i].page = page;
2212 skb_shinfo(skb)->frags[i].page_offset = 0;
2213 skb_shinfo(skb)->frags[i].size =
2214 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2215 datalen -= skb_shinfo(skb)->frags[i].size;
2216 skb->len += skb_shinfo(skb)->frags[i].size;
2217 skb->data_len += skb_shinfo(skb)->frags[i].size;
2218 i++;
2219 skb_shinfo(skb)->nr_frags = i;
2220 }
2221
2222 while (i < frags) {
2223 int rem;
2224
2225 if (i == 0)
2226 break;
2227
2228 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2229 if (rem == 0)
2230 break;
2231
2232 skb_shinfo(skb)->frags[i - 1].size -= rem;
2233
2234 skb_shinfo(skb)->frags[i] = skb_shinfo(skb)->frags[i - 1];
2235 get_page(skb_shinfo(skb)->frags[i].page);
2236 skb_shinfo(skb)->frags[i].page = skb_shinfo(skb)->frags[i - 1].page;
2237 skb_shinfo(skb)->frags[i].page_offset += skb_shinfo(skb)->frags[i - 1].size;
2238 skb_shinfo(skb)->frags[i].size = rem;
2239 i++;
2240 skb_shinfo(skb)->nr_frags = i;
2241 }
2242 }
2243
2244 /* Stamp the time, and sequence number, convert them to network byte order */
2245 /* should we update cloned packets too ? */
2246 if (pgh) {
2247 struct timeval timestamp;
2248
2249 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2250 pgh->seq_num = htonl(pkt_dev->seq_num);
2251
2252 do_gettimeofday(&timestamp);
2253 pgh->tv_sec = htonl(timestamp.tv_sec);
2254 pgh->tv_usec = htonl(timestamp.tv_usec);
2255 }
2256 pkt_dev->seq_num++;
2257
2258 return skb;
2259 }
2260
2261 static inline struct sk_buff *fill_packet(struct net_device *odev,
2262 struct pktgen_dev *pkt_dev)
2263 {
2264 if(pkt_dev->flags & F_IPV6)
2265 return fill_packet_ipv6(odev, pkt_dev);
2266 else
2267 return fill_packet_ipv4(odev, pkt_dev);
2268 }
2269
2270 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2271 {
2272 pkt_dev->seq_num = 1;
2273 pkt_dev->idle_acc = 0;
2274 pkt_dev->sofar = 0;
2275 pkt_dev->tx_bytes = 0;
2276 pkt_dev->errors = 0;
2277 }
2278
2279 /* Set up structure for sending pkts, clear counters */
2280
2281 static void pktgen_run(struct pktgen_thread *t)
2282 {
2283 struct pktgen_dev *pkt_dev = NULL;
2284 int started = 0;
2285
2286 PG_DEBUG(printk("pktgen: entering pktgen_run. %p\n", t));
2287
2288 if_lock(t);
2289 for (pkt_dev = t->if_list; pkt_dev; pkt_dev = pkt_dev->next ) {
2290
2291 /*
2292 * setup odev and create initial packet.
2293 */
2294 pktgen_setup_inject(pkt_dev);
2295
2296 if(pkt_dev->odev) {
2297 pktgen_clear_counters(pkt_dev);
2298 pkt_dev->running = 1; /* Cranke yeself! */
2299 pkt_dev->skb = NULL;
2300 pkt_dev->started_at = getCurUs();
2301 pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */
2302 pkt_dev->next_tx_ns = 0;
2303
2304 strcpy(pkt_dev->result, "Starting");
2305 started++;
2306 }
2307 else
2308 strcpy(pkt_dev->result, "Error starting");
2309 }
2310 if_unlock(t);
2311 if(started) t->control &= ~(T_STOP);
2312 }
2313
2314 static void pktgen_stop_all_threads_ifs(void)
2315 {
2316 struct pktgen_thread *t = pktgen_threads;
2317
2318 PG_DEBUG(printk("pktgen: entering pktgen_stop_all_threads.\n"));
2319
2320 thread_lock();
2321 while(t) {
2322 pktgen_stop(t);
2323 t = t->next;
2324 }
2325 thread_unlock();
2326 }
2327
2328 static int thread_is_running(struct pktgen_thread *t )
2329 {
2330 struct pktgen_dev *next;
2331 int res = 0;
2332
2333 for(next=t->if_list; next; next=next->next) {
2334 if(next->running) {
2335 res = 1;
2336 break;
2337 }
2338 }
2339 return res;
2340 }
2341
2342 static int pktgen_wait_thread_run(struct pktgen_thread *t )
2343 {
2344 if_lock(t);
2345
2346 while(thread_is_running(t)) {
2347
2348 if_unlock(t);
2349
2350 msleep_interruptible(100);
2351
2352 if (signal_pending(current))
2353 goto signal;
2354 if_lock(t);
2355 }
2356 if_unlock(t);
2357 return 1;
2358 signal:
2359 return 0;
2360 }
2361
2362 static int pktgen_wait_all_threads_run(void)
2363 {
2364 struct pktgen_thread *t = pktgen_threads;
2365 int sig = 1;
2366
2367 while (t) {
2368 sig = pktgen_wait_thread_run(t);
2369 if( sig == 0 ) break;
2370 thread_lock();
2371 t=t->next;
2372 thread_unlock();
2373 }
2374 if(sig == 0) {
2375 thread_lock();
2376 while (t) {
2377 t->control |= (T_STOP);
2378 t=t->next;
2379 }
2380 thread_unlock();
2381 }
2382 return sig;
2383 }
2384
2385 static void pktgen_run_all_threads(void)
2386 {
2387 struct pktgen_thread *t = pktgen_threads;
2388
2389 PG_DEBUG(printk("pktgen: entering pktgen_run_all_threads.\n"));
2390
2391 thread_lock();
2392
2393 while(t) {
2394 t->control |= (T_RUN);
2395 t = t->next;
2396 }
2397 thread_unlock();
2398
2399 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
2400
2401 pktgen_wait_all_threads_run();
2402 }
2403
2404
2405 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
2406 {
2407 __u64 total_us, bps, mbps, pps, idle;
2408 char *p = pkt_dev->result;
2409
2410 total_us = pkt_dev->stopped_at - pkt_dev->started_at;
2411
2412 idle = pkt_dev->idle_acc;
2413
2414 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
2415 (unsigned long long) total_us,
2416 (unsigned long long)(total_us - idle),
2417 (unsigned long long) idle,
2418 (unsigned long long) pkt_dev->sofar,
2419 pkt_dev->cur_pkt_size, nr_frags);
2420
2421 pps = pkt_dev->sofar * USEC_PER_SEC;
2422
2423 while ((total_us >> 32) != 0) {
2424 pps >>= 1;
2425 total_us >>= 1;
2426 }
2427
2428 do_div(pps, total_us);
2429
2430 bps = pps * 8 * pkt_dev->cur_pkt_size;
2431
2432 mbps = bps;
2433 do_div(mbps, 1000000);
2434 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
2435 (unsigned long long) pps,
2436 (unsigned long long) mbps,
2437 (unsigned long long) bps,
2438 (unsigned long long) pkt_dev->errors);
2439 }
2440
2441
2442 /* Set stopped-at timer, remove from running list, do counters & statistics */
2443
2444 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
2445 {
2446
2447 if (!pkt_dev->running) {
2448 printk("pktgen: interface: %s is already stopped\n", pkt_dev->ifname);
2449 return -EINVAL;
2450 }
2451
2452 pkt_dev->stopped_at = getCurUs();
2453 pkt_dev->running = 0;
2454
2455 show_results(pkt_dev, skb_shinfo(pkt_dev->skb)->nr_frags);
2456
2457 if (pkt_dev->skb)
2458 kfree_skb(pkt_dev->skb);
2459
2460 pkt_dev->skb = NULL;
2461
2462 return 0;
2463 }
2464
2465 static struct pktgen_dev *next_to_run(struct pktgen_thread *t )
2466 {
2467 struct pktgen_dev *next, *best = NULL;
2468
2469 if_lock(t);
2470
2471 for(next=t->if_list; next ; next=next->next) {
2472 if(!next->running) continue;
2473 if(best == NULL) best=next;
2474 else if ( next->next_tx_us < best->next_tx_us)
2475 best = next;
2476 }
2477 if_unlock(t);
2478 return best;
2479 }
2480
2481 static void pktgen_stop(struct pktgen_thread *t) {
2482 struct pktgen_dev *next = NULL;
2483
2484 PG_DEBUG(printk("pktgen: entering pktgen_stop.\n"));
2485
2486 if_lock(t);
2487
2488 for(next=t->if_list; next; next=next->next)
2489 pktgen_stop_device(next);
2490
2491 if_unlock(t);
2492 }
2493
2494 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
2495 {
2496 struct pktgen_dev *cur, *next = NULL;
2497
2498 /* Remove all devices, free mem */
2499
2500 if_lock(t);
2501
2502 for(cur=t->if_list; cur; cur=next) {
2503 next = cur->next;
2504 pktgen_remove_device(t, cur);
2505 }
2506
2507 if_unlock(t);
2508 }
2509
2510 static void pktgen_rem_thread(struct pktgen_thread *t)
2511 {
2512 /* Remove from the thread list */
2513
2514 struct pktgen_thread *tmp = pktgen_threads;
2515
2516 remove_proc_entry(t->name, pg_proc_dir);
2517
2518 thread_lock();
2519
2520 if (tmp == t)
2521 pktgen_threads = tmp->next;
2522 else {
2523 while (tmp) {
2524 if (tmp->next == t) {
2525 tmp->next = t->next;
2526 t->next = NULL;
2527 break;
2528 }
2529 tmp = tmp->next;
2530 }
2531 }
2532 thread_unlock();
2533 }
2534
2535 static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
2536 {
2537 struct net_device *odev = NULL;
2538 __u64 idle_start = 0;
2539 int ret;
2540
2541 odev = pkt_dev->odev;
2542
2543 if (pkt_dev->delay_us || pkt_dev->delay_ns) {
2544 u64 now;
2545
2546 now = getCurUs();
2547 if (now < pkt_dev->next_tx_us)
2548 spin(pkt_dev, pkt_dev->next_tx_us);
2549
2550 /* This is max DELAY, this has special meaning of
2551 * "never transmit"
2552 */
2553 if (pkt_dev->delay_us == 0x7FFFFFFF) {
2554 pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us;
2555 pkt_dev->next_tx_ns = pkt_dev->delay_ns;
2556 goto out;
2557 }
2558 }
2559
2560 if (netif_queue_stopped(odev) || need_resched()) {
2561 idle_start = getCurUs();
2562
2563 if (!netif_running(odev)) {
2564 pktgen_stop_device(pkt_dev);
2565 goto out;
2566 }
2567 if (need_resched())
2568 schedule();
2569
2570 pkt_dev->idle_acc += getCurUs() - idle_start;
2571
2572 if (netif_queue_stopped(odev)) {
2573 pkt_dev->next_tx_us = getCurUs(); /* TODO */
2574 pkt_dev->next_tx_ns = 0;
2575 goto out; /* Try the next interface */
2576 }
2577 }
2578
2579 if (pkt_dev->last_ok || !pkt_dev->skb) {
2580 if ((++pkt_dev->clone_count >= pkt_dev->clone_skb ) || (!pkt_dev->skb)) {
2581 /* build a new pkt */
2582 if (pkt_dev->skb)
2583 kfree_skb(pkt_dev->skb);
2584
2585 pkt_dev->skb = fill_packet(odev, pkt_dev);
2586 if (pkt_dev->skb == NULL) {
2587 printk("pktgen: ERROR: couldn't allocate skb in fill_packet.\n");
2588 schedule();
2589 pkt_dev->clone_count--; /* back out increment, OOM */
2590 goto out;
2591 }
2592 pkt_dev->allocated_skbs++;
2593 pkt_dev->clone_count = 0; /* reset counter */
2594 }
2595 }
2596
2597 spin_lock_bh(&odev->xmit_lock);
2598 if (!netif_queue_stopped(odev)) {
2599
2600 atomic_inc(&(pkt_dev->skb->users));
2601 retry_now:
2602 ret = odev->hard_start_xmit(pkt_dev->skb, odev);
2603 if (likely(ret == NETDEV_TX_OK)) {
2604 pkt_dev->last_ok = 1;
2605 pkt_dev->sofar++;
2606 pkt_dev->seq_num++;
2607 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size;
2608
2609 } else if (ret == NETDEV_TX_LOCKED
2610 && (odev->features & NETIF_F_LLTX)) {
2611 cpu_relax();
2612 goto retry_now;
2613 } else { /* Retry it next time */
2614
2615 atomic_dec(&(pkt_dev->skb->users));
2616
2617 if (debug && net_ratelimit())
2618 printk(KERN_INFO "pktgen: Hard xmit error\n");
2619
2620 pkt_dev->errors++;
2621 pkt_dev->last_ok = 0;
2622 }
2623
2624 pkt_dev->next_tx_us = getCurUs();
2625 pkt_dev->next_tx_ns = 0;
2626
2627 pkt_dev->next_tx_us += pkt_dev->delay_us;
2628 pkt_dev->next_tx_ns += pkt_dev->delay_ns;
2629
2630 if (pkt_dev->next_tx_ns > 1000) {
2631 pkt_dev->next_tx_us++;
2632 pkt_dev->next_tx_ns -= 1000;
2633 }
2634 }
2635
2636 else { /* Retry it next time */
2637 pkt_dev->last_ok = 0;
2638 pkt_dev->next_tx_us = getCurUs(); /* TODO */
2639 pkt_dev->next_tx_ns = 0;
2640 }
2641
2642 spin_unlock_bh(&odev->xmit_lock);
2643
2644 /* If pkt_dev->count is zero, then run forever */
2645 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
2646 if (atomic_read(&(pkt_dev->skb->users)) != 1) {
2647 idle_start = getCurUs();
2648 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
2649 if (signal_pending(current)) {
2650 break;
2651 }
2652 schedule();
2653 }
2654 pkt_dev->idle_acc += getCurUs() - idle_start;
2655 }
2656
2657 /* Done with this */
2658 pktgen_stop_device(pkt_dev);
2659 }
2660 out:;
2661 }
2662
2663 /*
2664 * Main loop of the thread goes here
2665 */
2666
2667 static void pktgen_thread_worker(struct pktgen_thread *t)
2668 {
2669 DEFINE_WAIT(wait);
2670 struct pktgen_dev *pkt_dev = NULL;
2671 int cpu = t->cpu;
2672 sigset_t tmpsig;
2673 u32 max_before_softirq;
2674 u32 tx_since_softirq = 0;
2675
2676 daemonize("pktgen/%d", cpu);
2677
2678 /* Block all signals except SIGKILL, SIGSTOP and SIGTERM */
2679
2680 spin_lock_irq(&current->sighand->siglock);
2681 tmpsig = current->blocked;
2682 siginitsetinv(&current->blocked,
2683 sigmask(SIGKILL) |
2684 sigmask(SIGSTOP)|
2685 sigmask(SIGTERM));
2686
2687 recalc_sigpending();
2688 spin_unlock_irq(&current->sighand->siglock);
2689
2690 /* Migrate to the right CPU */
2691 set_cpus_allowed(current, cpumask_of_cpu(cpu));
2692 if (smp_processor_id() != cpu)
2693 BUG();
2694
2695 init_waitqueue_head(&t->queue);
2696
2697 t->control &= ~(T_TERMINATE);
2698 t->control &= ~(T_RUN);
2699 t->control &= ~(T_STOP);
2700 t->control &= ~(T_REMDEV);
2701
2702 t->pid = current->pid;
2703
2704 PG_DEBUG(printk("pktgen: starting pktgen/%d: pid=%d\n", cpu, current->pid));
2705
2706 max_before_softirq = t->max_before_softirq;
2707
2708 __set_current_state(TASK_INTERRUPTIBLE);
2709 mb();
2710
2711 while (1) {
2712
2713 __set_current_state(TASK_RUNNING);
2714
2715 /*
2716 * Get next dev to xmit -- if any.
2717 */
2718
2719 pkt_dev = next_to_run(t);
2720
2721 if (pkt_dev) {
2722
2723 pktgen_xmit(pkt_dev);
2724
2725 /*
2726 * We like to stay RUNNING but must also give
2727 * others fair share.
2728 */
2729
2730 tx_since_softirq += pkt_dev->last_ok;
2731
2732 if (tx_since_softirq > max_before_softirq) {
2733 if (local_softirq_pending())
2734 do_softirq();
2735 tx_since_softirq = 0;
2736 }
2737 } else {
2738 prepare_to_wait(&(t->queue), &wait, TASK_INTERRUPTIBLE);
2739 schedule_timeout(HZ/10);
2740 finish_wait(&(t->queue), &wait);
2741 }
2742
2743 /*
2744 * Back from sleep, either due to the timeout or signal.
2745 * We check if we have any "posted" work for us.
2746 */
2747
2748 if (t->control & T_TERMINATE || signal_pending(current))
2749 /* we received a request to terminate ourself */
2750 break;
2751
2752
2753 if(t->control & T_STOP) {
2754 pktgen_stop(t);
2755 t->control &= ~(T_STOP);
2756 }
2757
2758 if(t->control & T_RUN) {
2759 pktgen_run(t);
2760 t->control &= ~(T_RUN);
2761 }
2762
2763 if(t->control & T_REMDEV) {
2764 pktgen_rem_all_ifs(t);
2765 t->control &= ~(T_REMDEV);
2766 }
2767
2768 if (need_resched())
2769 schedule();
2770 }
2771
2772 PG_DEBUG(printk("pktgen: %s stopping all device\n", t->name));
2773 pktgen_stop(t);
2774
2775 PG_DEBUG(printk("pktgen: %s removing all device\n", t->name));
2776 pktgen_rem_all_ifs(t);
2777
2778 PG_DEBUG(printk("pktgen: %s removing thread.\n", t->name));
2779 pktgen_rem_thread(t);
2780 }
2781
2782 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, const char* ifname)
2783 {
2784 struct pktgen_dev *pkt_dev = NULL;
2785 if_lock(t);
2786
2787 for(pkt_dev=t->if_list; pkt_dev; pkt_dev = pkt_dev->next ) {
2788 if (strncmp(pkt_dev->ifname, ifname, IFNAMSIZ) == 0) {
2789 break;
2790 }
2791 }
2792
2793 if_unlock(t);
2794 PG_DEBUG(printk("pktgen: find_dev(%s) returning %p\n", ifname,pkt_dev));
2795 return pkt_dev;
2796 }
2797
2798 /*
2799 * Adds a dev at front of if_list.
2800 */
2801
2802 static int add_dev_to_thread(struct pktgen_thread *t, struct pktgen_dev *pkt_dev)
2803 {
2804 int rv = 0;
2805
2806 if_lock(t);
2807
2808 if (pkt_dev->pg_thread) {
2809 printk("pktgen: ERROR: already assigned to a thread.\n");
2810 rv = -EBUSY;
2811 goto out;
2812 }
2813 pkt_dev->next =t->if_list; t->if_list=pkt_dev;
2814 pkt_dev->pg_thread = t;
2815 pkt_dev->running = 0;
2816
2817 out:
2818 if_unlock(t);
2819 return rv;
2820 }
2821
2822 /* Called under thread lock */
2823
2824 static int pktgen_add_device(struct pktgen_thread *t, const char* ifname)
2825 {
2826 struct pktgen_dev *pkt_dev;
2827 struct proc_dir_entry *pe;
2828
2829 /* We don't allow a device to be on several threads */
2830
2831 pkt_dev = __pktgen_NN_threads(ifname, FIND);
2832 if (pkt_dev) {
2833 printk("pktgen: ERROR: interface already used.\n");
2834 return -EBUSY;
2835 }
2836
2837 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
2838 if (!pkt_dev)
2839 return -ENOMEM;
2840
2841 pkt_dev->flows = vmalloc(MAX_CFLOWS*sizeof(struct flow_state));
2842 if (pkt_dev->flows == NULL) {
2843 kfree(pkt_dev);
2844 return -ENOMEM;
2845 }
2846 memset(pkt_dev->flows, 0, MAX_CFLOWS*sizeof(struct flow_state));
2847
2848 pkt_dev->min_pkt_size = ETH_ZLEN;
2849 pkt_dev->max_pkt_size = ETH_ZLEN;
2850 pkt_dev->nfrags = 0;
2851 pkt_dev->clone_skb = pg_clone_skb_d;
2852 pkt_dev->delay_us = pg_delay_d / 1000;
2853 pkt_dev->delay_ns = pg_delay_d % 1000;
2854 pkt_dev->count = pg_count_d;
2855 pkt_dev->sofar = 0;
2856 pkt_dev->udp_src_min = 9; /* sink port */
2857 pkt_dev->udp_src_max = 9;
2858 pkt_dev->udp_dst_min = 9;
2859 pkt_dev->udp_dst_max = 9;
2860
2861 strncpy(pkt_dev->ifname, ifname, IFNAMSIZ);
2862
2863 if (! pktgen_setup_dev(pkt_dev)) {
2864 printk("pktgen: ERROR: pktgen_setup_dev failed.\n");
2865 if (pkt_dev->flows)
2866 vfree(pkt_dev->flows);
2867 kfree(pkt_dev);
2868 return -ENODEV;
2869 }
2870
2871 pe = create_proc_entry(ifname, 0600, pg_proc_dir);
2872 if (!pe) {
2873 printk("pktgen: cannot create %s/%s procfs entry.\n",
2874 PG_PROC_DIR, ifname);
2875 if (pkt_dev->flows)
2876 vfree(pkt_dev->flows);
2877 kfree(pkt_dev);
2878 return -EINVAL;
2879 }
2880 pe->proc_fops = &pktgen_if_fops;
2881 pe->data = pkt_dev;
2882
2883 return add_dev_to_thread(t, pkt_dev);
2884 }
2885
2886 static struct pktgen_thread *pktgen_find_thread(const char* name)
2887 {
2888 struct pktgen_thread *t = NULL;
2889
2890 thread_lock();
2891
2892 t = pktgen_threads;
2893 while (t) {
2894 if (strcmp(t->name, name) == 0)
2895 break;
2896
2897 t = t->next;
2898 }
2899 thread_unlock();
2900 return t;
2901 }
2902
2903 static int pktgen_create_thread(const char* name, int cpu)
2904 {
2905 struct pktgen_thread *t = NULL;
2906 struct proc_dir_entry *pe;
2907
2908 if (strlen(name) > 31) {
2909 printk("pktgen: ERROR: Thread name cannot be more than 31 characters.\n");
2910 return -EINVAL;
2911 }
2912
2913 if (pktgen_find_thread(name)) {
2914 printk("pktgen: ERROR: thread: %s already exists\n", name);
2915 return -EINVAL;
2916 }
2917
2918 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL);
2919 if (!t) {
2920 printk("pktgen: ERROR: out of memory, can't create new thread.\n");
2921 return -ENOMEM;
2922 }
2923
2924 strcpy(t->name, name);
2925 spin_lock_init(&t->if_lock);
2926 t->cpu = cpu;
2927
2928 pe = create_proc_entry(t->name, 0600, pg_proc_dir);
2929 if (!pe) {
2930 printk("pktgen: cannot create %s/%s procfs entry.\n",
2931 PG_PROC_DIR, t->name);
2932 kfree(t);
2933 return -EINVAL;
2934 }
2935
2936 pe->proc_fops = &pktgen_thread_fops;
2937 pe->data = t;
2938
2939 t->next = pktgen_threads;
2940 pktgen_threads = t;
2941
2942 if (kernel_thread((void *) pktgen_thread_worker, (void *) t,
2943 CLONE_FS | CLONE_FILES | CLONE_SIGHAND) < 0)
2944 printk("pktgen: kernel_thread() failed for cpu %d\n", t->cpu);
2945
2946 return 0;
2947 }
2948
2949 /*
2950 * Removes a device from the thread if_list.
2951 */
2952 static void _rem_dev_from_if_list(struct pktgen_thread *t, struct pktgen_dev *pkt_dev)
2953 {
2954 struct pktgen_dev *i, *prev = NULL;
2955
2956 i = t->if_list;
2957
2958 while(i) {
2959 if(i == pkt_dev) {
2960 if(prev) prev->next = i->next;
2961 else t->if_list = NULL;
2962 break;
2963 }
2964 prev = i;
2965 i=i->next;
2966 }
2967 }
2968
2969 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *pkt_dev)
2970 {
2971
2972 PG_DEBUG(printk("pktgen: remove_device pkt_dev=%p\n", pkt_dev));
2973
2974 if (pkt_dev->running) {
2975 printk("pktgen:WARNING: trying to remove a running interface, stopping it now.\n");
2976 pktgen_stop_device(pkt_dev);
2977 }
2978
2979 /* Dis-associate from the interface */
2980
2981 if (pkt_dev->odev) {
2982 dev_put(pkt_dev->odev);
2983 pkt_dev->odev = NULL;
2984 }
2985
2986 /* And update the thread if_list */
2987
2988 _rem_dev_from_if_list(t, pkt_dev);
2989
2990 /* Clean up proc file system */
2991
2992 remove_proc_entry(pkt_dev->ifname, pg_proc_dir);
2993
2994 if (pkt_dev->flows)
2995 vfree(pkt_dev->flows);
2996 kfree(pkt_dev);
2997 return 0;
2998 }
2999
3000 static int __init pg_init(void)
3001 {
3002 int cpu;
3003 struct proc_dir_entry *pe;
3004
3005 printk(version);
3006
3007 pg_proc_dir = proc_mkdir(PG_PROC_DIR, proc_net);
3008 if (!pg_proc_dir)
3009 return -ENODEV;
3010 pg_proc_dir->owner = THIS_MODULE;
3011
3012 pe = create_proc_entry(PGCTRL, 0600, pg_proc_dir);
3013 if (pe == NULL) {
3014 printk("pktgen: ERROR: cannot create %s procfs entry.\n", PGCTRL);
3015 proc_net_remove(PG_PROC_DIR);
3016 return -EINVAL;
3017 }
3018
3019 pe->proc_fops = &pktgen_fops;
3020 pe->data = NULL;
3021
3022 /* Register us to receive netdevice events */
3023 register_netdevice_notifier(&pktgen_notifier_block);
3024
3025 for_each_online_cpu(cpu) {
3026 char buf[30];
3027
3028 sprintf(buf, "kpktgend_%i", cpu);
3029 pktgen_create_thread(buf, cpu);
3030 }
3031 return 0;
3032 }
3033
3034 static void __exit pg_cleanup(void)
3035 {
3036 wait_queue_head_t queue;
3037 init_waitqueue_head(&queue);
3038
3039 /* Stop all interfaces & threads */
3040
3041 while (pktgen_threads) {
3042 struct pktgen_thread *t = pktgen_threads;
3043 pktgen_threads->control |= (T_TERMINATE);
3044
3045 wait_event_interruptible_timeout(queue, (t != pktgen_threads), HZ);
3046 }
3047
3048 /* Un-register us from receiving netdevice events */
3049 unregister_netdevice_notifier(&pktgen_notifier_block);
3050
3051 /* Clean up proc file system */
3052 remove_proc_entry(PGCTRL, pg_proc_dir);
3053 proc_net_remove(PG_PROC_DIR);
3054 }
3055
3056
3057 module_init(pg_init);
3058 module_exit(pg_cleanup);
3059
3060 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se");
3061 MODULE_DESCRIPTION("Packet Generator tool");
3062 MODULE_LICENSE("GPL");
3063 module_param(pg_count_d, int, 0);
3064 module_param(pg_delay_d, int, 0);
3065 module_param(pg_clone_skb_d, int, 0);
3066 module_param(debug, int, 0);
linux v2.6.22.y-op