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