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USB: unusual_devs entry for Nokia 6234
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / core / pktgen.c
blob6e972e489b6dd078b9eb1fe3fb9ea3719c648fff
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 <linux/completion.h>
143 #include <linux/etherdevice.h>
144 #include <net/checksum.h>
145 #include <net/ipv6.h>
146 #include <net/addrconf.h>
147 #include <asm/byteorder.h>
148 #include <linux/rcupdate.h>
149 #include <asm/bitops.h>
150 #include <asm/io.h>
151 #include <asm/dma.h>
152 #include <asm/uaccess.h>
153 #include <asm/div64.h> /* do_div */
154 #include <asm/timex.h>
155
156
157 #define VERSION "pktgen v2.63: Packet Generator for packet performance testing.\n"
158
159 /* #define PG_DEBUG(a) a */
160 #define PG_DEBUG(a)
161
162 /* The buckets are exponential in 'width' */
163 #define LAT_BUCKETS_MAX 32
164 #define IP_NAME_SZ 32
165
166 /* Device flag bits */
167 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
168 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
169 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
170 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
171 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
172 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
173 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
174 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
175
176 /* Thread control flag bits */
177 #define T_TERMINATE (1<<0)
178 #define T_STOP (1<<1) /* Stop run */
179 #define T_RUN (1<<2) /* Start run */
180 #define T_REMDEV (1<<3) /* Remove all devs */
181
182 /* Locks */
183 #define thread_lock() down(&pktgen_sem)
184 #define thread_unlock() up(&pktgen_sem)
185
186 /* If lock -- can be removed after some work */
187 #define if_lock(t) spin_lock(&(t->if_lock));
188 #define if_unlock(t) spin_unlock(&(t->if_lock));
189
190 /* Used to help with determining the pkts on receive */
191 #define PKTGEN_MAGIC 0xbe9be955
192 #define PG_PROC_DIR "pktgen"
193 #define PGCTRL "pgctrl"
194 static struct proc_dir_entry *pg_proc_dir = NULL;
195
196 #define MAX_CFLOWS 65536
197
198 struct pktgen_thread_info {
199 struct pktgen_thread *t;
200 struct completion *c;
201 };
202
203 struct flow_state
204 {
205 __u32 cur_daddr;
206 int count;
207 };
208
209 struct pktgen_dev {
210
211 /*
212 * Try to keep frequent/infrequent used vars. separated.
213 */
214
215 char ifname[IFNAMSIZ];
216 char result[512];
217
218 struct pktgen_thread* pg_thread; /* the owner */
219 struct pktgen_dev *next; /* Used for chaining in the thread's run-queue */
220
221 int running; /* if this changes to false, the test will stop */
222
223 /* If min != max, then we will either do a linear iteration, or
224 * we will do a random selection from within the range.
225 */
226 __u32 flags;
227
228 int min_pkt_size; /* = ETH_ZLEN; */
229 int max_pkt_size; /* = ETH_ZLEN; */
230 int nfrags;
231 __u32 delay_us; /* Default delay */
232 __u32 delay_ns;
233 __u64 count; /* Default No packets to send */
234 __u64 sofar; /* How many pkts we've sent so far */
235 __u64 tx_bytes; /* How many bytes we've transmitted */
236 __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */
237
238 /* runtime counters relating to clone_skb */
239 __u64 next_tx_us; /* timestamp of when to tx next */
240 __u32 next_tx_ns;
241
242 __u64 allocated_skbs;
243 __u32 clone_count;
244 int last_ok; /* Was last skb sent?
245 * Or a failed transmit of some sort? This will keep
246 * sequence numbers in order, for example.
247 */
248 __u64 started_at; /* micro-seconds */
249 __u64 stopped_at; /* micro-seconds */
250 __u64 idle_acc; /* micro-seconds */
251 __u32 seq_num;
252
253 int clone_skb; /* Use multiple SKBs during packet gen. If this number
254 * is greater than 1, then that many copies of the same
255 * packet will be sent before a new packet is allocated.
256 * For instance, if you want to send 1024 identical packets
257 * before creating a new packet, set clone_skb to 1024.
258 */
259
260 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
261 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
262 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
263 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
264
265 struct in6_addr in6_saddr;
266 struct in6_addr in6_daddr;
267 struct in6_addr cur_in6_daddr;
268 struct in6_addr cur_in6_saddr;
269 /* For ranges */
270 struct in6_addr min_in6_daddr;
271 struct in6_addr max_in6_daddr;
272 struct in6_addr min_in6_saddr;
273 struct in6_addr max_in6_saddr;
274
275 /* If we're doing ranges, random or incremental, then this
276 * defines the min/max for those ranges.
277 */
278 __u32 saddr_min; /* inclusive, source IP address */
279 __u32 saddr_max; /* exclusive, source IP address */
280 __u32 daddr_min; /* inclusive, dest IP address */
281 __u32 daddr_max; /* exclusive, dest IP address */
282
283 __u16 udp_src_min; /* inclusive, source UDP port */
284 __u16 udp_src_max; /* exclusive, source UDP port */
285 __u16 udp_dst_min; /* inclusive, dest UDP port */
286 __u16 udp_dst_max; /* exclusive, dest UDP port */
287
288 __u32 src_mac_count; /* How many MACs to iterate through */
289 __u32 dst_mac_count; /* How many MACs to iterate through */
290
291 unsigned char dst_mac[ETH_ALEN];
292 unsigned char src_mac[ETH_ALEN];
293
294 __u32 cur_dst_mac_offset;
295 __u32 cur_src_mac_offset;
296 __u32 cur_saddr;
297 __u32 cur_daddr;
298 __u16 cur_udp_dst;
299 __u16 cur_udp_src;
300 __u32 cur_pkt_size;
301
302 __u8 hh[14];
303 /* = {
304 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
305
306 We fill in SRC address later
307 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
308 0x08, 0x00
309 };
310 */
311 __u16 pad; /* pad out the hh struct to an even 16 bytes */
312
313 struct sk_buff* skb; /* skb we are to transmit next, mainly used for when we
314 * are transmitting the same one multiple times
315 */
316 struct net_device* odev; /* The out-going device. Note that the device should
317 * have it's pg_info pointer pointing back to this
318 * device. This will be set when the user specifies
319 * the out-going device name (not when the inject is
320 * started as it used to do.)
321 */
322 struct flow_state *flows;
323 unsigned cflows; /* Concurrent flows (config) */
324 unsigned lflow; /* Flow length (config) */
325 unsigned nflows; /* accumulated flows (stats) */
326 };
327
328 struct pktgen_hdr {
329 __u32 pgh_magic;
330 __u32 seq_num;
331 __u32 tv_sec;
332 __u32 tv_usec;
333 };
334
335 struct pktgen_thread {
336 spinlock_t if_lock;
337 struct pktgen_dev *if_list; /* All device here */
338 struct pktgen_thread* next;
339 char name[32];
340 char result[512];
341 u32 max_before_softirq; /* We'll call do_softirq to prevent starvation. */
342
343 /* Field for thread to receive "posted" events terminate, stop ifs etc.*/
344
345 u32 control;
346 int pid;
347 int cpu;
348
349 wait_queue_head_t queue;
350 };
351
352 #define REMOVE 1
353 #define FIND 0
354
355 /* This code works around the fact that do_div cannot handle two 64-bit
356 numbers, and regular 64-bit division doesn't work on x86 kernels.
357 --Ben
358 */
359
360 #define PG_DIV 0
361
362 /* This was emailed to LMKL by: Chris Caputo <ccaputo@alt.net>
363 * Function copied/adapted/optimized from:
364 *
365 * nemesis.sourceforge.net/browse/lib/static/intmath/ix86/intmath.c.html
366 *
367 * Copyright 1994, University of Cambridge Computer Laboratory
368 * All Rights Reserved.
369 *
370 */
371 static inline s64 divremdi3(s64 x, s64 y, int type)
372 {
373 u64 a = (x < 0) ? -x : x;
374 u64 b = (y < 0) ? -y : y;
375 u64 res = 0, d = 1;
376
377 if (b > 0) {
378 while (b < a) {
379 b <<= 1;
380 d <<= 1;
381 }
382 }
383
384 do {
385 if ( a >= b ) {
386 a -= b;
387 res += d;
388 }
389 b >>= 1;
390 d >>= 1;
391 }
392 while (d);
393
394 if (PG_DIV == type) {
395 return (((x ^ y) & (1ll<<63)) == 0) ? res : -(s64)res;
396 }
397 else {
398 return ((x & (1ll<<63)) == 0) ? a : -(s64)a;
399 }
400 }
401
402 /* End of hacks to deal with 64-bit math on x86 */
403
404 /** Convert to milliseconds */
405 static inline __u64 tv_to_ms(const struct timeval* tv)
406 {
407 __u64 ms = tv->tv_usec / 1000;
408 ms += (__u64)tv->tv_sec * (__u64)1000;
409 return ms;
410 }
411
412
413 /** Convert to micro-seconds */
414 static inline __u64 tv_to_us(const struct timeval* tv)
415 {
416 __u64 us = tv->tv_usec;
417 us += (__u64)tv->tv_sec * (__u64)1000000;
418 return us;
419 }
420
421 static inline __u64 pg_div(__u64 n, __u32 base) {
422 __u64 tmp = n;
423 do_div(tmp, base);
424 /* printk("pktgen: pg_div, n: %llu base: %d rv: %llu\n",
425 n, base, tmp); */
426 return tmp;
427 }
428
429 static inline __u64 pg_div64(__u64 n, __u64 base)
430 {
431 __u64 tmp = n;
432 /*
433 * How do we know if the architecture we are running on
434 * supports division with 64 bit base?
435 *
436 */
437 #if defined(__sparc_v9__) || defined(__powerpc64__) || defined(__alpha__) || defined(__x86_64__) || defined(__ia64__)
438
439 do_div(tmp, base);
440 #else
441 tmp = divremdi3(n, base, PG_DIV);
442 #endif
443 return tmp;
444 }
445
446 static inline u32 pktgen_random(void)
447 {
448 #if 0
449 __u32 n;
450 get_random_bytes(&n, 4);
451 return n;
452 #else
453 return net_random();
454 #endif
455 }
456
457 static inline __u64 getCurMs(void)
458 {
459 struct timeval tv;
460 do_gettimeofday(&tv);
461 return tv_to_ms(&tv);
462 }
463
464 static inline __u64 getCurUs(void)
465 {
466 struct timeval tv;
467 do_gettimeofday(&tv);
468 return tv_to_us(&tv);
469 }
470
471 static inline __u64 tv_diff(const struct timeval* a, const struct timeval* b)
472 {
473 return tv_to_us(a) - tv_to_us(b);
474 }
475
476
477 /* old include end */
478
479 static char version[] __initdata = VERSION;
480
481 static int pktgen_remove_device(struct pktgen_thread* t, struct pktgen_dev *i);
482 static int pktgen_add_device(struct pktgen_thread* t, const char* ifname);
483 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread* t, const char* ifname);
484 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
485 static void pktgen_run_all_threads(void);
486 static void pktgen_stop_all_threads_ifs(void);
487 static int pktgen_stop_device(struct pktgen_dev *pkt_dev);
488 static void pktgen_stop(struct pktgen_thread* t);
489 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
490 static struct pktgen_dev *pktgen_NN_threads(const char* dev_name, int remove);
491 static unsigned int scan_ip6(const char *s,char ip[16]);
492 static unsigned int fmt_ip6(char *s,const char ip[16]);
493
494 /* Module parameters, defaults. */
495 static int pg_count_d = 1000; /* 1000 pkts by default */
496 static int pg_delay_d;
497 static int pg_clone_skb_d;
498 static int debug;
499
500 static DECLARE_MUTEX(pktgen_sem);
501 static struct pktgen_thread *pktgen_threads = NULL;
502
503 static struct notifier_block pktgen_notifier_block = {
504 .notifier_call = pktgen_device_event,
505 };
506
507 /*
508 * /proc handling functions
509 *
510 */
511
512 static int pgctrl_show(struct seq_file *seq, void *v)
513 {
514 seq_puts(seq, VERSION);
515 return 0;
516 }
517
518 static ssize_t pgctrl_write(struct file* file,const char __user * buf,
519 size_t count, loff_t *ppos)
520 {
521 int err = 0;
522 char data[128];
523
524 if (!capable(CAP_NET_ADMIN)){
525 err = -EPERM;
526 goto out;
527 }
528
529 if (count > sizeof(data))
530 count = sizeof(data);
531
532 if (copy_from_user(data, buf, count)) {
533 err = -EFAULT;
534 goto out;
535 }
536 data[count-1] = 0; /* Make string */
537
538 if (!strcmp(data, "stop"))
539 pktgen_stop_all_threads_ifs();
540
541 else if (!strcmp(data, "start"))
542 pktgen_run_all_threads();
543
544 else
545 printk("pktgen: Unknown command: %s\n", data);
546
547 err = count;
548
549 out:
550 return err;
551 }
552
553 static int pgctrl_open(struct inode *inode, struct file *file)
554 {
555 return single_open(file, pgctrl_show, PDE(inode)->data);
556 }
557
558 static struct file_operations pktgen_fops = {
559 .owner = THIS_MODULE,
560 .open = pgctrl_open,
561 .read = seq_read,
562 .llseek = seq_lseek,
563 .write = pgctrl_write,
564 .release = single_release,
565 };
566
567 static int pktgen_if_show(struct seq_file *seq, void *v)
568 {
569 int i;
570 struct pktgen_dev *pkt_dev = seq->private;
571 __u64 sa;
572 __u64 stopped;
573 __u64 now = getCurUs();
574
575 seq_printf(seq, "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
576 (unsigned long long) pkt_dev->count,
577 pkt_dev->min_pkt_size, pkt_dev->max_pkt_size);
578
579 seq_printf(seq, " frags: %d delay: %u clone_skb: %d ifname: %s\n",
580 pkt_dev->nfrags, 1000*pkt_dev->delay_us+pkt_dev->delay_ns, pkt_dev->clone_skb, pkt_dev->ifname);
581
582 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, pkt_dev->lflow);
583
584
585 if(pkt_dev->flags & F_IPV6) {
586 char b1[128], b2[128], b3[128];
587 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
588 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
589 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
590 seq_printf(seq, " saddr: %s min_saddr: %s max_saddr: %s\n", b1, b2, b3);
591
592 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
593 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
594 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
595 seq_printf(seq, " daddr: %s min_daddr: %s max_daddr: %s\n", b1, b2, b3);
596
597 }
598 else
599 seq_printf(seq," dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n",
600 pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min, pkt_dev->src_max);
601
602 seq_puts(seq, " src_mac: ");
603
604 if (is_zero_ether_addr(pkt_dev->src_mac))
605 for (i = 0; i < 6; i++)
606 seq_printf(seq, "%02X%s", pkt_dev->odev->dev_addr[i], i == 5 ? " " : ":");
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[ETH_ALEN];
1193 unsigned char *m = pkt_dev->dst_mac;
1194 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
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 (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1224 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
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 (is_zero_ether_addr(pkt_dev->src_mac))
1564 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
1565
1566 /* Set up Dest MAC */
1567 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1568
1569 /* Set up pkt size */
1570 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
1571
1572 if(pkt_dev->flags & F_IPV6) {
1573 /*
1574 * Skip this automatic address setting until locks or functions
1575 * gets exported
1576 */
1577
1578 #ifdef NOTNOW
1579 int i, set = 0, err=1;
1580 struct inet6_dev *idev;
1581
1582 for(i=0; i< IN6_ADDR_HSIZE; i++)
1583 if(pkt_dev->cur_in6_saddr.s6_addr[i]) {
1584 set = 1;
1585 break;
1586 }
1587
1588 if(!set) {
1589
1590 /*
1591 * Use linklevel address if unconfigured.
1592 *
1593 * use ipv6_get_lladdr if/when it's get exported
1594 */
1595
1596
1597 read_lock(&addrconf_lock);
1598 if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) {
1599 struct inet6_ifaddr *ifp;
1600
1601 read_lock_bh(&idev->lock);
1602 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1603 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1604 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &ifp->addr);
1605 err = 0;
1606 break;
1607 }
1608 }
1609 read_unlock_bh(&idev->lock);
1610 }
1611 read_unlock(&addrconf_lock);
1612 if(err) printk("pktgen: ERROR: IPv6 link address not availble.\n");
1613 }
1614 #endif
1615 }
1616 else {
1617 pkt_dev->saddr_min = 0;
1618 pkt_dev->saddr_max = 0;
1619 if (strlen(pkt_dev->src_min) == 0) {
1620
1621 struct in_device *in_dev;
1622
1623 rcu_read_lock();
1624 in_dev = __in_dev_get_rcu(pkt_dev->odev);
1625 if (in_dev) {
1626 if (in_dev->ifa_list) {
1627 pkt_dev->saddr_min = in_dev->ifa_list->ifa_address;
1628 pkt_dev->saddr_max = pkt_dev->saddr_min;
1629 }
1630 }
1631 rcu_read_unlock();
1632 }
1633 else {
1634 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1635 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1636 }
1637
1638 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1639 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1640 }
1641 /* Initialize current values. */
1642 pkt_dev->cur_dst_mac_offset = 0;
1643 pkt_dev->cur_src_mac_offset = 0;
1644 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1645 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1646 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
1647 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
1648 pkt_dev->nflows = 0;
1649 }
1650
1651 static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us)
1652 {
1653 __u64 start;
1654 __u64 now;
1655
1656 start = now = getCurUs();
1657 printk(KERN_INFO "sleeping for %d\n", (int)(spin_until_us - now));
1658 while (now < spin_until_us) {
1659 /* TODO: optimize sleeping behavior */
1660 if (spin_until_us - now > jiffies_to_usecs(1)+1)
1661 schedule_timeout_interruptible(1);
1662 else if (spin_until_us - now > 100) {
1663 do_softirq();
1664 if (!pkt_dev->running)
1665 return;
1666 if (need_resched())
1667 schedule();
1668 }
1669
1670 now = getCurUs();
1671 }
1672
1673 pkt_dev->idle_acc += now - start;
1674 }
1675
1676
1677 /* Increment/randomize headers according to flags and current values
1678 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
1679 */
1680 static void mod_cur_headers(struct pktgen_dev *pkt_dev) {
1681 __u32 imn;
1682 __u32 imx;
1683 int flow = 0;
1684
1685 if(pkt_dev->cflows) {
1686 flow = pktgen_random() % pkt_dev->cflows;
1687
1688 if (pkt_dev->flows[flow].count > pkt_dev->lflow)
1689 pkt_dev->flows[flow].count = 0;
1690 }
1691
1692
1693 /* Deal with source MAC */
1694 if (pkt_dev->src_mac_count > 1) {
1695 __u32 mc;
1696 __u32 tmp;
1697
1698 if (pkt_dev->flags & F_MACSRC_RND)
1699 mc = pktgen_random() % (pkt_dev->src_mac_count);
1700 else {
1701 mc = pkt_dev->cur_src_mac_offset++;
1702 if (pkt_dev->cur_src_mac_offset > pkt_dev->src_mac_count)
1703 pkt_dev->cur_src_mac_offset = 0;
1704 }
1705
1706 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
1707 pkt_dev->hh[11] = tmp;
1708 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
1709 pkt_dev->hh[10] = tmp;
1710 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
1711 pkt_dev->hh[9] = tmp;
1712 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
1713 pkt_dev->hh[8] = tmp;
1714 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
1715 pkt_dev->hh[7] = tmp;
1716 }
1717
1718 /* Deal with Destination MAC */
1719 if (pkt_dev->dst_mac_count > 1) {
1720 __u32 mc;
1721 __u32 tmp;
1722
1723 if (pkt_dev->flags & F_MACDST_RND)
1724 mc = pktgen_random() % (pkt_dev->dst_mac_count);
1725
1726 else {
1727 mc = pkt_dev->cur_dst_mac_offset++;
1728 if (pkt_dev->cur_dst_mac_offset > pkt_dev->dst_mac_count) {
1729 pkt_dev->cur_dst_mac_offset = 0;
1730 }
1731 }
1732
1733 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
1734 pkt_dev->hh[5] = tmp;
1735 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
1736 pkt_dev->hh[4] = tmp;
1737 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
1738 pkt_dev->hh[3] = tmp;
1739 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
1740 pkt_dev->hh[2] = tmp;
1741 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
1742 pkt_dev->hh[1] = tmp;
1743 }
1744
1745 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
1746 if (pkt_dev->flags & F_UDPSRC_RND)
1747 pkt_dev->cur_udp_src = ((pktgen_random() % (pkt_dev->udp_src_max - pkt_dev->udp_src_min)) + pkt_dev->udp_src_min);
1748
1749 else {
1750 pkt_dev->cur_udp_src++;
1751 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
1752 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
1753 }
1754 }
1755
1756 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
1757 if (pkt_dev->flags & F_UDPDST_RND) {
1758 pkt_dev->cur_udp_dst = ((pktgen_random() % (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)) + pkt_dev->udp_dst_min);
1759 }
1760 else {
1761 pkt_dev->cur_udp_dst++;
1762 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
1763 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
1764 }
1765 }
1766
1767 if (!(pkt_dev->flags & F_IPV6)) {
1768
1769 if ((imn = ntohl(pkt_dev->saddr_min)) < (imx = ntohl(pkt_dev->saddr_max))) {
1770 __u32 t;
1771 if (pkt_dev->flags & F_IPSRC_RND)
1772 t = ((pktgen_random() % (imx - imn)) + imn);
1773 else {
1774 t = ntohl(pkt_dev->cur_saddr);
1775 t++;
1776 if (t > imx) {
1777 t = imn;
1778 }
1779 }
1780 pkt_dev->cur_saddr = htonl(t);
1781 }
1782
1783 if (pkt_dev->cflows && pkt_dev->flows[flow].count != 0) {
1784 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
1785 } else {
1786
1787 if ((imn = ntohl(pkt_dev->daddr_min)) < (imx = ntohl(pkt_dev->daddr_max))) {
1788 __u32 t;
1789 if (pkt_dev->flags & F_IPDST_RND) {
1790
1791 t = ((pktgen_random() % (imx - imn)) + imn);
1792 t = htonl(t);
1793
1794 while( LOOPBACK(t) || MULTICAST(t) || BADCLASS(t) || ZERONET(t) || LOCAL_MCAST(t) ) {
1795 t = ((pktgen_random() % (imx - imn)) + imn);
1796 t = htonl(t);
1797 }
1798 pkt_dev->cur_daddr = t;
1799 }
1800
1801 else {
1802 t = ntohl(pkt_dev->cur_daddr);
1803 t++;
1804 if (t > imx) {
1805 t = imn;
1806 }
1807 pkt_dev->cur_daddr = htonl(t);
1808 }
1809 }
1810 if(pkt_dev->cflows) {
1811 pkt_dev->flows[flow].cur_daddr = pkt_dev->cur_daddr;
1812 pkt_dev->nflows++;
1813 }
1814 }
1815 }
1816 else /* IPV6 * */
1817 {
1818 if(pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
1819 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
1820 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
1821 pkt_dev->min_in6_daddr.s6_addr32[3] == 0);
1822 else {
1823 int i;
1824
1825 /* Only random destinations yet */
1826
1827 for(i=0; i < 4; i++) {
1828 pkt_dev->cur_in6_daddr.s6_addr32[i] =
1829 ((pktgen_random() |
1830 pkt_dev->min_in6_daddr.s6_addr32[i]) &
1831 pkt_dev->max_in6_daddr.s6_addr32[i]);
1832 }
1833 }
1834 }
1835
1836 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
1837 __u32 t;
1838 if (pkt_dev->flags & F_TXSIZE_RND) {
1839 t = ((pktgen_random() % (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size))
1840 + pkt_dev->min_pkt_size);
1841 }
1842 else {
1843 t = pkt_dev->cur_pkt_size + 1;
1844 if (t > pkt_dev->max_pkt_size)
1845 t = pkt_dev->min_pkt_size;
1846 }
1847 pkt_dev->cur_pkt_size = t;
1848 }
1849
1850 pkt_dev->flows[flow].count++;
1851 }
1852
1853
1854 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
1855 struct pktgen_dev *pkt_dev)
1856 {
1857 struct sk_buff *skb = NULL;
1858 __u8 *eth;
1859 struct udphdr *udph;
1860 int datalen, iplen;
1861 struct iphdr *iph;
1862 struct pktgen_hdr *pgh = NULL;
1863
1864 /* Update any of the values, used when we're incrementing various
1865 * fields.
1866 */
1867 mod_cur_headers(pkt_dev);
1868
1869 datalen = (odev->hard_header_len + 16) & ~0xf;
1870 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + datalen, GFP_ATOMIC);
1871 if (!skb) {
1872 sprintf(pkt_dev->result, "No memory");
1873 return NULL;
1874 }
1875
1876 skb_reserve(skb, datalen);
1877
1878 /* Reserve for ethernet and IP header */
1879 eth = (__u8 *) skb_push(skb, 14);
1880 iph = (struct iphdr *)skb_put(skb, sizeof(struct iphdr));
1881 udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
1882
1883 memcpy(eth, pkt_dev->hh, 12);
1884 *(u16*)&eth[12] = __constant_htons(ETH_P_IP);
1885
1886 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8; /* Eth + IPh + UDPh */
1887 if (datalen < sizeof(struct pktgen_hdr))
1888 datalen = sizeof(struct pktgen_hdr);
1889
1890 udph->source = htons(pkt_dev->cur_udp_src);
1891 udph->dest = htons(pkt_dev->cur_udp_dst);
1892 udph->len = htons(datalen + 8); /* DATA + udphdr */
1893 udph->check = 0; /* No checksum */
1894
1895 iph->ihl = 5;
1896 iph->version = 4;
1897 iph->ttl = 32;
1898 iph->tos = 0;
1899 iph->protocol = IPPROTO_UDP; /* UDP */
1900 iph->saddr = pkt_dev->cur_saddr;
1901 iph->daddr = pkt_dev->cur_daddr;
1902 iph->frag_off = 0;
1903 iplen = 20 + 8 + datalen;
1904 iph->tot_len = htons(iplen);
1905 iph->check = 0;
1906 iph->check = ip_fast_csum((void *) iph, iph->ihl);
1907 skb->protocol = __constant_htons(ETH_P_IP);
1908 skb->mac.raw = ((u8 *)iph) - 14;
1909 skb->dev = odev;
1910 skb->pkt_type = PACKET_HOST;
1911 skb->nh.iph = iph;
1912 skb->h.uh = udph;
1913
1914 if (pkt_dev->nfrags <= 0)
1915 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
1916 else {
1917 int frags = pkt_dev->nfrags;
1918 int i;
1919
1920 pgh = (struct pktgen_hdr*)(((char*)(udph)) + 8);
1921
1922 if (frags > MAX_SKB_FRAGS)
1923 frags = MAX_SKB_FRAGS;
1924 if (datalen > frags*PAGE_SIZE) {
1925 skb_put(skb, datalen-frags*PAGE_SIZE);
1926 datalen = frags*PAGE_SIZE;
1927 }
1928
1929 i = 0;
1930 while (datalen > 0) {
1931 struct page *page = alloc_pages(GFP_KERNEL, 0);
1932 skb_shinfo(skb)->frags[i].page = page;
1933 skb_shinfo(skb)->frags[i].page_offset = 0;
1934 skb_shinfo(skb)->frags[i].size =
1935 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
1936 datalen -= skb_shinfo(skb)->frags[i].size;
1937 skb->len += skb_shinfo(skb)->frags[i].size;
1938 skb->data_len += skb_shinfo(skb)->frags[i].size;
1939 i++;
1940 skb_shinfo(skb)->nr_frags = i;
1941 }
1942
1943 while (i < frags) {
1944 int rem;
1945
1946 if (i == 0)
1947 break;
1948
1949 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
1950 if (rem == 0)
1951 break;
1952
1953 skb_shinfo(skb)->frags[i - 1].size -= rem;
1954
1955 skb_shinfo(skb)->frags[i] = skb_shinfo(skb)->frags[i - 1];
1956 get_page(skb_shinfo(skb)->frags[i].page);
1957 skb_shinfo(skb)->frags[i].page = skb_shinfo(skb)->frags[i - 1].page;
1958 skb_shinfo(skb)->frags[i].page_offset += skb_shinfo(skb)->frags[i - 1].size;
1959 skb_shinfo(skb)->frags[i].size = rem;
1960 i++;
1961 skb_shinfo(skb)->nr_frags = i;
1962 }
1963 }
1964
1965 /* Stamp the time, and sequence number, convert them to network byte order */
1966
1967 if (pgh) {
1968 struct timeval timestamp;
1969
1970 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
1971 pgh->seq_num = htonl(pkt_dev->seq_num);
1972
1973 do_gettimeofday(&timestamp);
1974 pgh->tv_sec = htonl(timestamp.tv_sec);
1975 pgh->tv_usec = htonl(timestamp.tv_usec);
1976 }
1977 pkt_dev->seq_num++;
1978
1979 return skb;
1980 }
1981
1982 /*
1983 * scan_ip6, fmt_ip taken from dietlibc-0.21
1984 * Author Felix von Leitner <felix-dietlibc@fefe.de>
1985 *
1986 * Slightly modified for kernel.
1987 * Should be candidate for net/ipv4/utils.c
1988 * --ro
1989 */
1990
1991 static unsigned int scan_ip6(const char *s,char ip[16])
1992 {
1993 unsigned int i;
1994 unsigned int len=0;
1995 unsigned long u;
1996 char suffix[16];
1997 unsigned int prefixlen=0;
1998 unsigned int suffixlen=0;
1999 __u32 tmp;
2000
2001 for (i=0; i<16; i++) ip[i]=0;
2002
2003 for (;;) {
2004 if (*s == ':') {
2005 len++;
2006 if (s[1] == ':') { /* Found "::", skip to part 2 */
2007 s+=2;
2008 len++;
2009 break;
2010 }
2011 s++;
2012 }
2013 {
2014 char *tmp;
2015 u=simple_strtoul(s,&tmp,16);
2016 i=tmp-s;
2017 }
2018
2019 if (!i) return 0;
2020 if (prefixlen==12 && s[i]=='.') {
2021
2022 /* the last 4 bytes may be written as IPv4 address */
2023
2024 tmp = in_aton(s);
2025 memcpy((struct in_addr*)(ip+12), &tmp, sizeof(tmp));
2026 return i+len;
2027 }
2028 ip[prefixlen++] = (u >> 8);
2029 ip[prefixlen++] = (u & 255);
2030 s += i; len += i;
2031 if (prefixlen==16)
2032 return len;
2033 }
2034
2035 /* part 2, after "::" */
2036 for (;;) {
2037 if (*s == ':') {
2038 if (suffixlen==0)
2039 break;
2040 s++;
2041 len++;
2042 } else if (suffixlen!=0)
2043 break;
2044 {
2045 char *tmp;
2046 u=simple_strtol(s,&tmp,16);
2047 i=tmp-s;
2048 }
2049 if (!i) {
2050 if (*s) len--;
2051 break;
2052 }
2053 if (suffixlen+prefixlen<=12 && s[i]=='.') {
2054 tmp = in_aton(s);
2055 memcpy((struct in_addr*)(suffix+suffixlen), &tmp, sizeof(tmp));
2056 suffixlen+=4;
2057 len+=strlen(s);
2058 break;
2059 }
2060 suffix[suffixlen++] = (u >> 8);
2061 suffix[suffixlen++] = (u & 255);
2062 s += i; len += i;
2063 if (prefixlen+suffixlen==16)
2064 break;
2065 }
2066 for (i=0; i<suffixlen; i++)
2067 ip[16-suffixlen+i] = suffix[i];
2068 return len;
2069 }
2070
2071 static char tohex(char hexdigit) {
2072 return hexdigit>9?hexdigit+'a'-10:hexdigit+'0';
2073 }
2074
2075 static int fmt_xlong(char* s,unsigned int i) {
2076 char* bak=s;
2077 *s=tohex((i>>12)&0xf); if (s!=bak || *s!='0') ++s;
2078 *s=tohex((i>>8)&0xf); if (s!=bak || *s!='0') ++s;
2079 *s=tohex((i>>4)&0xf); if (s!=bak || *s!='0') ++s;
2080 *s=tohex(i&0xf);
2081 return s-bak+1;
2082 }
2083
2084 static unsigned int fmt_ip6(char *s,const char ip[16]) {
2085 unsigned int len;
2086 unsigned int i;
2087 unsigned int temp;
2088 unsigned int compressing;
2089 int j;
2090
2091 len = 0; compressing = 0;
2092 for (j=0; j<16; j+=2) {
2093
2094 #ifdef V4MAPPEDPREFIX
2095 if (j==12 && !memcmp(ip,V4mappedprefix,12)) {
2096 inet_ntoa_r(*(struct in_addr*)(ip+12),s);
2097 temp=strlen(s);
2098 return len+temp;
2099 }
2100 #endif
2101 temp = ((unsigned long) (unsigned char) ip[j] << 8) +
2102 (unsigned long) (unsigned char) ip[j+1];
2103 if (temp == 0) {
2104 if (!compressing) {
2105 compressing=1;
2106 if (j==0) {
2107 *s++=':'; ++len;
2108 }
2109 }
2110 } else {
2111 if (compressing) {
2112 compressing=0;
2113 *s++=':'; ++len;
2114 }
2115 i = fmt_xlong(s,temp); len += i; s += i;
2116 if (j<14) {
2117 *s++ = ':';
2118 ++len;
2119 }
2120 }
2121 }
2122 if (compressing) {
2123 *s++=':'; ++len;
2124 }
2125 *s=0;
2126 return len;
2127 }
2128
2129 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2130 struct pktgen_dev *pkt_dev)
2131 {
2132 struct sk_buff *skb = NULL;
2133 __u8 *eth;
2134 struct udphdr *udph;
2135 int datalen;
2136 struct ipv6hdr *iph;
2137 struct pktgen_hdr *pgh = NULL;
2138
2139 /* Update any of the values, used when we're incrementing various
2140 * fields.
2141 */
2142 mod_cur_headers(pkt_dev);
2143
2144 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16, GFP_ATOMIC);
2145 if (!skb) {
2146 sprintf(pkt_dev->result, "No memory");
2147 return NULL;
2148 }
2149
2150 skb_reserve(skb, 16);
2151
2152 /* Reserve for ethernet and IP header */
2153 eth = (__u8 *) skb_push(skb, 14);
2154 iph = (struct ipv6hdr *)skb_put(skb, sizeof(struct ipv6hdr));
2155 udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
2156
2157 memcpy(eth, pkt_dev->hh, 12);
2158 *(u16*)&eth[12] = __constant_htons(ETH_P_IPV6);
2159
2160 datalen = pkt_dev->cur_pkt_size-14-
2161 sizeof(struct ipv6hdr)-sizeof(struct udphdr); /* Eth + IPh + UDPh */
2162
2163 if (datalen < sizeof(struct pktgen_hdr)) {
2164 datalen = sizeof(struct pktgen_hdr);
2165 if (net_ratelimit())
2166 printk(KERN_INFO "pktgen: increased datalen to %d\n", datalen);
2167 }
2168
2169 udph->source = htons(pkt_dev->cur_udp_src);
2170 udph->dest = htons(pkt_dev->cur_udp_dst);
2171 udph->len = htons(datalen + sizeof(struct udphdr));
2172 udph->check = 0; /* No checksum */
2173
2174 *(u32*)iph = __constant_htonl(0x60000000); /* Version + flow */
2175
2176 iph->hop_limit = 32;
2177
2178 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2179 iph->nexthdr = IPPROTO_UDP;
2180
2181 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2182 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2183
2184 skb->mac.raw = ((u8 *)iph) - 14;
2185 skb->protocol = __constant_htons(ETH_P_IPV6);
2186 skb->dev = odev;
2187 skb->pkt_type = PACKET_HOST;
2188 skb->nh.ipv6h = iph;
2189 skb->h.uh = udph;
2190
2191 if (pkt_dev->nfrags <= 0)
2192 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2193 else {
2194 int frags = pkt_dev->nfrags;
2195 int i;
2196
2197 pgh = (struct pktgen_hdr*)(((char*)(udph)) + 8);
2198
2199 if (frags > MAX_SKB_FRAGS)
2200 frags = MAX_SKB_FRAGS;
2201 if (datalen > frags*PAGE_SIZE) {
2202 skb_put(skb, datalen-frags*PAGE_SIZE);
2203 datalen = frags*PAGE_SIZE;
2204 }
2205
2206 i = 0;
2207 while (datalen > 0) {
2208 struct page *page = alloc_pages(GFP_KERNEL, 0);
2209 skb_shinfo(skb)->frags[i].page = page;
2210 skb_shinfo(skb)->frags[i].page_offset = 0;
2211 skb_shinfo(skb)->frags[i].size =
2212 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2213 datalen -= skb_shinfo(skb)->frags[i].size;
2214 skb->len += skb_shinfo(skb)->frags[i].size;
2215 skb->data_len += skb_shinfo(skb)->frags[i].size;
2216 i++;
2217 skb_shinfo(skb)->nr_frags = i;
2218 }
2219
2220 while (i < frags) {
2221 int rem;
2222
2223 if (i == 0)
2224 break;
2225
2226 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2227 if (rem == 0)
2228 break;
2229
2230 skb_shinfo(skb)->frags[i - 1].size -= rem;
2231
2232 skb_shinfo(skb)->frags[i] = skb_shinfo(skb)->frags[i - 1];
2233 get_page(skb_shinfo(skb)->frags[i].page);
2234 skb_shinfo(skb)->frags[i].page = skb_shinfo(skb)->frags[i - 1].page;
2235 skb_shinfo(skb)->frags[i].page_offset += skb_shinfo(skb)->frags[i - 1].size;
2236 skb_shinfo(skb)->frags[i].size = rem;
2237 i++;
2238 skb_shinfo(skb)->nr_frags = i;
2239 }
2240 }
2241
2242 /* Stamp the time, and sequence number, convert them to network byte order */
2243 /* should we update cloned packets too ? */
2244 if (pgh) {
2245 struct timeval timestamp;
2246
2247 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2248 pgh->seq_num = htonl(pkt_dev->seq_num);
2249
2250 do_gettimeofday(&timestamp);
2251 pgh->tv_sec = htonl(timestamp.tv_sec);
2252 pgh->tv_usec = htonl(timestamp.tv_usec);
2253 }
2254 pkt_dev->seq_num++;
2255
2256 return skb;
2257 }
2258
2259 static inline struct sk_buff *fill_packet(struct net_device *odev,
2260 struct pktgen_dev *pkt_dev)
2261 {
2262 if(pkt_dev->flags & F_IPV6)
2263 return fill_packet_ipv6(odev, pkt_dev);
2264 else
2265 return fill_packet_ipv4(odev, pkt_dev);
2266 }
2267
2268 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2269 {
2270 pkt_dev->seq_num = 1;
2271 pkt_dev->idle_acc = 0;
2272 pkt_dev->sofar = 0;
2273 pkt_dev->tx_bytes = 0;
2274 pkt_dev->errors = 0;
2275 }
2276
2277 /* Set up structure for sending pkts, clear counters */
2278
2279 static void pktgen_run(struct pktgen_thread *t)
2280 {
2281 struct pktgen_dev *pkt_dev = NULL;
2282 int started = 0;
2283
2284 PG_DEBUG(printk("pktgen: entering pktgen_run. %p\n", t));
2285
2286 if_lock(t);
2287 for (pkt_dev = t->if_list; pkt_dev; pkt_dev = pkt_dev->next ) {
2288
2289 /*
2290 * setup odev and create initial packet.
2291 */
2292 pktgen_setup_inject(pkt_dev);
2293
2294 if(pkt_dev->odev) {
2295 pktgen_clear_counters(pkt_dev);
2296 pkt_dev->running = 1; /* Cranke yeself! */
2297 pkt_dev->skb = NULL;
2298 pkt_dev->started_at = getCurUs();
2299 pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */
2300 pkt_dev->next_tx_ns = 0;
2301
2302 strcpy(pkt_dev->result, "Starting");
2303 started++;
2304 }
2305 else
2306 strcpy(pkt_dev->result, "Error starting");
2307 }
2308 if_unlock(t);
2309 if(started) t->control &= ~(T_STOP);
2310 }
2311
2312 static void pktgen_stop_all_threads_ifs(void)
2313 {
2314 struct pktgen_thread *t = pktgen_threads;
2315
2316 PG_DEBUG(printk("pktgen: entering pktgen_stop_all_threads.\n"));
2317
2318 thread_lock();
2319 while(t) {
2320 pktgen_stop(t);
2321 t = t->next;
2322 }
2323 thread_unlock();
2324 }
2325
2326 static int thread_is_running(struct pktgen_thread *t )
2327 {
2328 struct pktgen_dev *next;
2329 int res = 0;
2330
2331 for(next=t->if_list; next; next=next->next) {
2332 if(next->running) {
2333 res = 1;
2334 break;
2335 }
2336 }
2337 return res;
2338 }
2339
2340 static int pktgen_wait_thread_run(struct pktgen_thread *t )
2341 {
2342 if_lock(t);
2343
2344 while(thread_is_running(t)) {
2345
2346 if_unlock(t);
2347
2348 msleep_interruptible(100);
2349
2350 if (signal_pending(current))
2351 goto signal;
2352 if_lock(t);
2353 }
2354 if_unlock(t);
2355 return 1;
2356 signal:
2357 return 0;
2358 }
2359
2360 static int pktgen_wait_all_threads_run(void)
2361 {
2362 struct pktgen_thread *t = pktgen_threads;
2363 int sig = 1;
2364
2365 while (t) {
2366 sig = pktgen_wait_thread_run(t);
2367 if( sig == 0 ) break;
2368 thread_lock();
2369 t=t->next;
2370 thread_unlock();
2371 }
2372 if(sig == 0) {
2373 thread_lock();
2374 while (t) {
2375 t->control |= (T_STOP);
2376 t=t->next;
2377 }
2378 thread_unlock();
2379 }
2380 return sig;
2381 }
2382
2383 static void pktgen_run_all_threads(void)
2384 {
2385 struct pktgen_thread *t = pktgen_threads;
2386
2387 PG_DEBUG(printk("pktgen: entering pktgen_run_all_threads.\n"));
2388
2389 thread_lock();
2390
2391 while(t) {
2392 t->control |= (T_RUN);
2393 t = t->next;
2394 }
2395 thread_unlock();
2396
2397 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
2398
2399 pktgen_wait_all_threads_run();
2400 }
2401
2402
2403 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
2404 {
2405 __u64 total_us, bps, mbps, pps, idle;
2406 char *p = pkt_dev->result;
2407
2408 total_us = pkt_dev->stopped_at - pkt_dev->started_at;
2409
2410 idle = pkt_dev->idle_acc;
2411
2412 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
2413 (unsigned long long) total_us,
2414 (unsigned long long)(total_us - idle),
2415 (unsigned long long) idle,
2416 (unsigned long long) pkt_dev->sofar,
2417 pkt_dev->cur_pkt_size, nr_frags);
2418
2419 pps = pkt_dev->sofar * USEC_PER_SEC;
2420
2421 while ((total_us >> 32) != 0) {
2422 pps >>= 1;
2423 total_us >>= 1;
2424 }
2425
2426 do_div(pps, total_us);
2427
2428 bps = pps * 8 * pkt_dev->cur_pkt_size;
2429
2430 mbps = bps;
2431 do_div(mbps, 1000000);
2432 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
2433 (unsigned long long) pps,
2434 (unsigned long long) mbps,
2435 (unsigned long long) bps,
2436 (unsigned long long) pkt_dev->errors);
2437 }
2438
2439
2440 /* Set stopped-at timer, remove from running list, do counters & statistics */
2441
2442 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
2443 {
2444
2445 if (!pkt_dev->running) {
2446 printk("pktgen: interface: %s is already stopped\n", pkt_dev->ifname);
2447 return -EINVAL;
2448 }
2449
2450 pkt_dev->stopped_at = getCurUs();
2451 pkt_dev->running = 0;
2452
2453 show_results(pkt_dev, skb_shinfo(pkt_dev->skb)->nr_frags);
2454
2455 if (pkt_dev->skb)
2456 kfree_skb(pkt_dev->skb);
2457
2458 pkt_dev->skb = NULL;
2459
2460 return 0;
2461 }
2462
2463 static struct pktgen_dev *next_to_run(struct pktgen_thread *t )
2464 {
2465 struct pktgen_dev *next, *best = NULL;
2466
2467 if_lock(t);
2468
2469 for(next=t->if_list; next ; next=next->next) {
2470 if(!next->running) continue;
2471 if(best == NULL) best=next;
2472 else if ( next->next_tx_us < best->next_tx_us)
2473 best = next;
2474 }
2475 if_unlock(t);
2476 return best;
2477 }
2478
2479 static void pktgen_stop(struct pktgen_thread *t) {
2480 struct pktgen_dev *next = NULL;
2481
2482 PG_DEBUG(printk("pktgen: entering pktgen_stop.\n"));
2483
2484 if_lock(t);
2485
2486 for(next=t->if_list; next; next=next->next)
2487 pktgen_stop_device(next);
2488
2489 if_unlock(t);
2490 }
2491
2492 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
2493 {
2494 struct pktgen_dev *cur, *next = NULL;
2495
2496 /* Remove all devices, free mem */
2497
2498 if_lock(t);
2499
2500 for(cur=t->if_list; cur; cur=next) {
2501 next = cur->next;
2502 pktgen_remove_device(t, cur);
2503 }
2504
2505 if_unlock(t);
2506 }
2507
2508 static void pktgen_rem_thread(struct pktgen_thread *t)
2509 {
2510 /* Remove from the thread list */
2511
2512 struct pktgen_thread *tmp = pktgen_threads;
2513
2514 remove_proc_entry(t->name, pg_proc_dir);
2515
2516 thread_lock();
2517
2518 if (tmp == t)
2519 pktgen_threads = tmp->next;
2520 else {
2521 while (tmp) {
2522 if (tmp->next == t) {
2523 tmp->next = t->next;
2524 t->next = NULL;
2525 break;
2526 }
2527 tmp = tmp->next;
2528 }
2529 }
2530 thread_unlock();
2531 }
2532
2533 static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
2534 {
2535 struct net_device *odev = NULL;
2536 __u64 idle_start = 0;
2537 int ret;
2538
2539 odev = pkt_dev->odev;
2540
2541 if (pkt_dev->delay_us || pkt_dev->delay_ns) {
2542 u64 now;
2543
2544 now = getCurUs();
2545 if (now < pkt_dev->next_tx_us)
2546 spin(pkt_dev, pkt_dev->next_tx_us);
2547
2548 /* This is max DELAY, this has special meaning of
2549 * "never transmit"
2550 */
2551 if (pkt_dev->delay_us == 0x7FFFFFFF) {
2552 pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us;
2553 pkt_dev->next_tx_ns = pkt_dev->delay_ns;
2554 goto out;
2555 }
2556 }
2557
2558 if (netif_queue_stopped(odev) || need_resched()) {
2559 idle_start = getCurUs();
2560
2561 if (!netif_running(odev)) {
2562 pktgen_stop_device(pkt_dev);
2563 goto out;
2564 }
2565 if (need_resched())
2566 schedule();
2567
2568 pkt_dev->idle_acc += getCurUs() - idle_start;
2569
2570 if (netif_queue_stopped(odev)) {
2571 pkt_dev->next_tx_us = getCurUs(); /* TODO */
2572 pkt_dev->next_tx_ns = 0;
2573 goto out; /* Try the next interface */
2574 }
2575 }
2576
2577 if (pkt_dev->last_ok || !pkt_dev->skb) {
2578 if ((++pkt_dev->clone_count >= pkt_dev->clone_skb ) || (!pkt_dev->skb)) {
2579 /* build a new pkt */
2580 if (pkt_dev->skb)
2581 kfree_skb(pkt_dev->skb);
2582
2583 pkt_dev->skb = fill_packet(odev, pkt_dev);
2584 if (pkt_dev->skb == NULL) {
2585 printk("pktgen: ERROR: couldn't allocate skb in fill_packet.\n");
2586 schedule();
2587 pkt_dev->clone_count--; /* back out increment, OOM */
2588 goto out;
2589 }
2590 pkt_dev->allocated_skbs++;
2591 pkt_dev->clone_count = 0; /* reset counter */
2592 }
2593 }
2594
2595 spin_lock_bh(&odev->xmit_lock);
2596 if (!netif_queue_stopped(odev)) {
2597
2598 atomic_inc(&(pkt_dev->skb->users));
2599 retry_now:
2600 ret = odev->hard_start_xmit(pkt_dev->skb, odev);
2601 if (likely(ret == NETDEV_TX_OK)) {
2602 pkt_dev->last_ok = 1;
2603 pkt_dev->sofar++;
2604 pkt_dev->seq_num++;
2605 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size;
2606
2607 } else if (ret == NETDEV_TX_LOCKED
2608 && (odev->features & NETIF_F_LLTX)) {
2609 cpu_relax();
2610 goto retry_now;
2611 } else { /* Retry it next time */
2612
2613 atomic_dec(&(pkt_dev->skb->users));
2614
2615 if (debug && net_ratelimit())
2616 printk(KERN_INFO "pktgen: Hard xmit error\n");
2617
2618 pkt_dev->errors++;
2619 pkt_dev->last_ok = 0;
2620 }
2621
2622 pkt_dev->next_tx_us = getCurUs();
2623 pkt_dev->next_tx_ns = 0;
2624
2625 pkt_dev->next_tx_us += pkt_dev->delay_us;
2626 pkt_dev->next_tx_ns += pkt_dev->delay_ns;
2627
2628 if (pkt_dev->next_tx_ns > 1000) {
2629 pkt_dev->next_tx_us++;
2630 pkt_dev->next_tx_ns -= 1000;
2631 }
2632 }
2633
2634 else { /* Retry it next time */
2635 pkt_dev->last_ok = 0;
2636 pkt_dev->next_tx_us = getCurUs(); /* TODO */
2637 pkt_dev->next_tx_ns = 0;
2638 }
2639
2640 spin_unlock_bh(&odev->xmit_lock);
2641
2642 /* If pkt_dev->count is zero, then run forever */
2643 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
2644 if (atomic_read(&(pkt_dev->skb->users)) != 1) {
2645 idle_start = getCurUs();
2646 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
2647 if (signal_pending(current)) {
2648 break;
2649 }
2650 schedule();
2651 }
2652 pkt_dev->idle_acc += getCurUs() - idle_start;
2653 }
2654
2655 /* Done with this */
2656 pktgen_stop_device(pkt_dev);
2657 }
2658 out:;
2659 }
2660
2661 /*
2662 * Main loop of the thread goes here
2663 */
2664
2665 static void pktgen_thread_worker(struct pktgen_thread_info *info)
2666 {
2667 DEFINE_WAIT(wait);
2668 struct pktgen_dev *pkt_dev = NULL;
2669 struct pktgen_thread *t = info->t;
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 complete(info->c);
2711
2712 while (1) {
2713
2714 __set_current_state(TASK_RUNNING);
2715
2716 /*
2717 * Get next dev to xmit -- if any.
2718 */
2719
2720 pkt_dev = next_to_run(t);
2721
2722 if (pkt_dev) {
2723
2724 pktgen_xmit(pkt_dev);
2725
2726 /*
2727 * We like to stay RUNNING but must also give
2728 * others fair share.
2729 */
2730
2731 tx_since_softirq += pkt_dev->last_ok;
2732
2733 if (tx_since_softirq > max_before_softirq) {
2734 if (local_softirq_pending())
2735 do_softirq();
2736 tx_since_softirq = 0;
2737 }
2738 } else {
2739 prepare_to_wait(&(t->queue), &wait, TASK_INTERRUPTIBLE);
2740 schedule_timeout(HZ/10);
2741 finish_wait(&(t->queue), &wait);
2742 }
2743
2744 /*
2745 * Back from sleep, either due to the timeout or signal.
2746 * We check if we have any "posted" work for us.
2747 */
2748
2749 if (t->control & T_TERMINATE || signal_pending(current))
2750 /* we received a request to terminate ourself */
2751 break;
2752
2753
2754 if(t->control & T_STOP) {
2755 pktgen_stop(t);
2756 t->control &= ~(T_STOP);
2757 }
2758
2759 if(t->control & T_RUN) {
2760 pktgen_run(t);
2761 t->control &= ~(T_RUN);
2762 }
2763
2764 if(t->control & T_REMDEV) {
2765 pktgen_rem_all_ifs(t);
2766 t->control &= ~(T_REMDEV);
2767 }
2768
2769 if (need_resched())
2770 schedule();
2771 }
2772
2773 PG_DEBUG(printk("pktgen: %s stopping all device\n", t->name));
2774 pktgen_stop(t);
2775
2776 PG_DEBUG(printk("pktgen: %s removing all device\n", t->name));
2777 pktgen_rem_all_ifs(t);
2778
2779 PG_DEBUG(printk("pktgen: %s removing thread.\n", t->name));
2780 pktgen_rem_thread(t);
2781 }
2782
2783 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, const char* ifname)
2784 {
2785 struct pktgen_dev *pkt_dev = NULL;
2786 if_lock(t);
2787
2788 for(pkt_dev=t->if_list; pkt_dev; pkt_dev = pkt_dev->next ) {
2789 if (strncmp(pkt_dev->ifname, ifname, IFNAMSIZ) == 0) {
2790 break;
2791 }
2792 }
2793
2794 if_unlock(t);
2795 PG_DEBUG(printk("pktgen: find_dev(%s) returning %p\n", ifname,pkt_dev));
2796 return pkt_dev;
2797 }
2798
2799 /*
2800 * Adds a dev at front of if_list.
2801 */
2802
2803 static int add_dev_to_thread(struct pktgen_thread *t, struct pktgen_dev *pkt_dev)
2804 {
2805 int rv = 0;
2806
2807 if_lock(t);
2808
2809 if (pkt_dev->pg_thread) {
2810 printk("pktgen: ERROR: already assigned to a thread.\n");
2811 rv = -EBUSY;
2812 goto out;
2813 }
2814 pkt_dev->next =t->if_list; t->if_list=pkt_dev;
2815 pkt_dev->pg_thread = t;
2816 pkt_dev->running = 0;
2817
2818 out:
2819 if_unlock(t);
2820 return rv;
2821 }
2822
2823 /* Called under thread lock */
2824
2825 static int pktgen_add_device(struct pktgen_thread *t, const char* ifname)
2826 {
2827 struct pktgen_dev *pkt_dev;
2828 struct proc_dir_entry *pe;
2829
2830 /* We don't allow a device to be on several threads */
2831
2832 pkt_dev = __pktgen_NN_threads(ifname, FIND);
2833 if (pkt_dev) {
2834 printk("pktgen: ERROR: interface already used.\n");
2835 return -EBUSY;
2836 }
2837
2838 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
2839 if (!pkt_dev)
2840 return -ENOMEM;
2841
2842 pkt_dev->flows = vmalloc(MAX_CFLOWS*sizeof(struct flow_state));
2843 if (pkt_dev->flows == NULL) {
2844 kfree(pkt_dev);
2845 return -ENOMEM;
2846 }
2847 memset(pkt_dev->flows, 0, MAX_CFLOWS*sizeof(struct flow_state));
2848
2849 pkt_dev->min_pkt_size = ETH_ZLEN;
2850 pkt_dev->max_pkt_size = ETH_ZLEN;
2851 pkt_dev->nfrags = 0;
2852 pkt_dev->clone_skb = pg_clone_skb_d;
2853 pkt_dev->delay_us = pg_delay_d / 1000;
2854 pkt_dev->delay_ns = pg_delay_d % 1000;
2855 pkt_dev->count = pg_count_d;
2856 pkt_dev->sofar = 0;
2857 pkt_dev->udp_src_min = 9; /* sink port */
2858 pkt_dev->udp_src_max = 9;
2859 pkt_dev->udp_dst_min = 9;
2860 pkt_dev->udp_dst_max = 9;
2861
2862 strncpy(pkt_dev->ifname, ifname, IFNAMSIZ);
2863
2864 if (! pktgen_setup_dev(pkt_dev)) {
2865 printk("pktgen: ERROR: pktgen_setup_dev failed.\n");
2866 if (pkt_dev->flows)
2867 vfree(pkt_dev->flows);
2868 kfree(pkt_dev);
2869 return -ENODEV;
2870 }
2871
2872 pe = create_proc_entry(ifname, 0600, pg_proc_dir);
2873 if (!pe) {
2874 printk("pktgen: cannot create %s/%s procfs entry.\n",
2875 PG_PROC_DIR, ifname);
2876 if (pkt_dev->flows)
2877 vfree(pkt_dev->flows);
2878 kfree(pkt_dev);
2879 return -EINVAL;
2880 }
2881 pe->proc_fops = &pktgen_if_fops;
2882 pe->data = pkt_dev;
2883
2884 return add_dev_to_thread(t, pkt_dev);
2885 }
2886
2887 static struct pktgen_thread * __init pktgen_find_thread(const char* name)
2888 {
2889 struct pktgen_thread *t = NULL;
2890
2891 thread_lock();
2892
2893 t = pktgen_threads;
2894 while (t) {
2895 if (strcmp(t->name, name) == 0)
2896 break;
2897
2898 t = t->next;
2899 }
2900 thread_unlock();
2901 return t;
2902 }
2903
2904 static int __init pktgen_create_thread(const char* name, int cpu)
2905 {
2906 struct pktgen_thread_info info;
2907 struct completion started;
2908 struct pktgen_thread *t = NULL;
2909 struct proc_dir_entry *pe;
2910
2911 if (strlen(name) > 31) {
2912 printk("pktgen: ERROR: Thread name cannot be more than 31 characters.\n");
2913 return -EINVAL;
2914 }
2915
2916 if (pktgen_find_thread(name)) {
2917 printk("pktgen: ERROR: thread: %s already exists\n", name);
2918 return -EINVAL;
2919 }
2920
2921 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL);
2922 if (!t) {
2923 printk("pktgen: ERROR: out of memory, can't create new thread.\n");
2924 return -ENOMEM;
2925 }
2926
2927 strcpy(t->name, name);
2928 spin_lock_init(&t->if_lock);
2929 t->cpu = cpu;
2930
2931 pe = create_proc_entry(t->name, 0600, pg_proc_dir);
2932 if (!pe) {
2933 printk("pktgen: cannot create %s/%s procfs entry.\n",
2934 PG_PROC_DIR, t->name);
2935 kfree(t);
2936 return -EINVAL;
2937 }
2938
2939 pe->proc_fops = &pktgen_thread_fops;
2940 pe->data = t;
2941
2942 t->next = pktgen_threads;
2943 pktgen_threads = t;
2944
2945 init_completion(&started);
2946 info.t = t;
2947 info.c = &started;
2948
2949 if (kernel_thread((void *) pktgen_thread_worker, (void *)&info,
2950 CLONE_FS | CLONE_FILES | CLONE_SIGHAND) < 0)
2951 printk("pktgen: kernel_thread() failed for cpu %d\n", t->cpu);
2952
2953 wait_for_completion(&started);
2954 return 0;
2955 }
2956
2957 /*
2958 * Removes a device from the thread if_list.
2959 */
2960 static void _rem_dev_from_if_list(struct pktgen_thread *t, struct pktgen_dev *pkt_dev)
2961 {
2962 struct pktgen_dev *i, *prev = NULL;
2963
2964 i = t->if_list;
2965
2966 while(i) {
2967 if(i == pkt_dev) {
2968 if(prev) prev->next = i->next;
2969 else t->if_list = NULL;
2970 break;
2971 }
2972 prev = i;
2973 i=i->next;
2974 }
2975 }
2976
2977 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *pkt_dev)
2978 {
2979
2980 PG_DEBUG(printk("pktgen: remove_device pkt_dev=%p\n", pkt_dev));
2981
2982 if (pkt_dev->running) {
2983 printk("pktgen:WARNING: trying to remove a running interface, stopping it now.\n");
2984 pktgen_stop_device(pkt_dev);
2985 }
2986
2987 /* Dis-associate from the interface */
2988
2989 if (pkt_dev->odev) {
2990 dev_put(pkt_dev->odev);
2991 pkt_dev->odev = NULL;
2992 }
2993
2994 /* And update the thread if_list */
2995
2996 _rem_dev_from_if_list(t, pkt_dev);
2997
2998 /* Clean up proc file system */
2999
3000 remove_proc_entry(pkt_dev->ifname, pg_proc_dir);
3001
3002 if (pkt_dev->flows)
3003 vfree(pkt_dev->flows);
3004 kfree(pkt_dev);
3005 return 0;
3006 }
3007
3008 static int __init pg_init(void)
3009 {
3010 int cpu;
3011 struct proc_dir_entry *pe;
3012
3013 printk(version);
3014
3015 pg_proc_dir = proc_mkdir(PG_PROC_DIR, proc_net);
3016 if (!pg_proc_dir)
3017 return -ENODEV;
3018 pg_proc_dir->owner = THIS_MODULE;
3019
3020 pe = create_proc_entry(PGCTRL, 0600, pg_proc_dir);
3021 if (pe == NULL) {
3022 printk("pktgen: ERROR: cannot create %s procfs entry.\n", PGCTRL);
3023 proc_net_remove(PG_PROC_DIR);
3024 return -EINVAL;
3025 }
3026
3027 pe->proc_fops = &pktgen_fops;
3028 pe->data = NULL;
3029
3030 /* Register us to receive netdevice events */
3031 register_netdevice_notifier(&pktgen_notifier_block);
3032
3033 for_each_online_cpu(cpu) {
3034 char buf[30];
3035
3036 sprintf(buf, "kpktgend_%i", cpu);
3037 pktgen_create_thread(buf, cpu);
3038 }
3039 return 0;
3040 }
3041
3042 static void __exit pg_cleanup(void)
3043 {
3044 wait_queue_head_t queue;
3045 init_waitqueue_head(&queue);
3046
3047 /* Stop all interfaces & threads */
3048
3049 while (pktgen_threads) {
3050 struct pktgen_thread *t = pktgen_threads;
3051 pktgen_threads->control |= (T_TERMINATE);
3052
3053 wait_event_interruptible_timeout(queue, (t != pktgen_threads), HZ);
3054 }
3055
3056 /* Un-register us from receiving netdevice events */
3057 unregister_netdevice_notifier(&pktgen_notifier_block);
3058
3059 /* Clean up proc file system */
3060 remove_proc_entry(PGCTRL, pg_proc_dir);
3061 proc_net_remove(PG_PROC_DIR);
3062 }
3063
3064
3065 module_init(pg_init);
3066 module_exit(pg_cleanup);
3067
3068 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se");
3069 MODULE_DESCRIPTION("Packet Generator tool");
3070 MODULE_LICENSE("GPL");
3071 module_param(pg_count_d, int, 0);
3072 module_param(pg_delay_d, int, 0);
3073 module_param(pg_clone_skb_d, int, 0);
3074 module_param(debug, int, 0);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree