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gerrit-public.fairphone.software / kernel / msm-4.9 / 121caf577dc61588c1128821873a08cec48baf58 / . / net / core / pktgen.c
blob: ef430b1e8e42acc87af3d12fb4c95544c8996570 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]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 pratical 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 * Rany Dunlap fixed u64 printk compiler waring
100 *
101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
103 *
104 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
106 *
107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
108 * 050103
109 */
110#include <linux/sys.h>
111#include <linux/types.h>
112#include <linux/module.h>
113#include <linux/moduleparam.h>
114#include <linux/kernel.h>
115#include <linux/smp_lock.h>
116#include <linux/sched.h>
117#include <linux/slab.h>
118#include <linux/vmalloc.h>
119#include <linux/sched.h>
120#include <linux/unistd.h>
121#include <linux/string.h>
122#include <linux/ptrace.h>
123#include <linux/errno.h>
124#include <linux/ioport.h>
125#include <linux/interrupt.h>
126#include <linux/delay.h>
127#include <linux/timer.h>
128#include <linux/init.h>
129#include <linux/skbuff.h>
130#include <linux/netdevice.h>
131#include <linux/inet.h>
132#include <linux/inetdevice.h>
133#include <linux/rtnetlink.h>
134#include <linux/if_arp.h>
135#include <linux/in.h>
136#include <linux/ip.h>
137#include <linux/ipv6.h>
138#include <linux/udp.h>
139#include <linux/proc_fs.h>
140#include <linux/wait.h>
141#include <net/checksum.h>
142#include <net/ipv6.h>
143#include <net/addrconf.h>
144#include <asm/byteorder.h>
145#include <linux/rcupdate.h>
146#include <asm/bitops.h>
147#include <asm/io.h>
148#include <asm/dma.h>
149#include <asm/uaccess.h>
150#include <asm/div64.h> /* do_div */
151#include <asm/timex.h>
152
153
Robert Olsson64053be2005-06-26 15:27:10 -0700[diff] [blame]154#define VERSION "pktgen v2.62: Packet Generator for packet performance testing.\n"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]155
156/* #define PG_DEBUG(a) a */
157#define PG_DEBUG(a)
158
159/* The buckets are exponential in 'width' */
160#define LAT_BUCKETS_MAX 32
161#define IP_NAME_SZ 32
162
163/* Device flag bits */
164#define F_IPSRC_RND (1<<0) /* IP-Src Random */
165#define F_IPDST_RND (1<<1) /* IP-Dst Random */
166#define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
167#define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
168#define F_MACSRC_RND (1<<4) /* MAC-Src Random */
169#define F_MACDST_RND (1<<5) /* MAC-Dst Random */
170#define F_TXSIZE_RND (1<<6) /* Transmit size is random */
171#define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
172
173/* Thread control flag bits */
174#define T_TERMINATE (1<<0)
175#define T_STOP (1<<1) /* Stop run */
176#define T_RUN (1<<2) /* Start run */
177#define T_REMDEV (1<<3) /* Remove all devs */
178
179/* Locks */
180#define thread_lock() spin_lock(&_thread_lock)
181#define thread_unlock() spin_unlock(&_thread_lock)
182
183/* If lock -- can be removed after some work */
184#define if_lock(t) spin_lock(&(t->if_lock));
185#define if_unlock(t) spin_unlock(&(t->if_lock));
186
187/* Used to help with determining the pkts on receive */
188#define PKTGEN_MAGIC 0xbe9be955
189#define PG_PROC_DIR "pktgen"
190
191#define MAX_CFLOWS 65536
192
193struct flow_state
194{
195 __u32 cur_daddr;
196 int count;
197};
198
199struct pktgen_dev {
200
201 /*
202 * Try to keep frequent/infrequent used vars. separated.
203 */
204
205 char ifname[32];
206 struct proc_dir_entry *proc_ent;
207 char result[512];
208 /* proc file names */
209 char fname[80];
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 coppies 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
321struct pktgen_hdr {
322 __u32 pgh_magic;
323 __u32 seq_num;
324 __u32 tv_sec;
325 __u32 tv_usec;
326};
327
328struct 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 fname[128]; /* name of proc file */
334 struct proc_dir_entry *proc_ent;
335 char result[512];
336 u32 max_before_softirq; /* We'll call do_softirq to prevent starvation. */
337
338 /* Field for thread to receive "posted" events terminate, stop ifs etc.*/
339
340 u32 control;
341 int pid;
342 int cpu;
343
344 wait_queue_head_t queue;
345};
346
347#define REMOVE 1
348#define FIND 0
349
350/* This code works around the fact that do_div cannot handle two 64-bit
351 numbers, and regular 64-bit division doesn't work on x86 kernels.
352 --Ben
353*/
354
355#define PG_DIV 0
356
357/* This was emailed to LMKL by: Chris Caputo <ccaputo@alt.net>
358 * Function copied/adapted/optimized from:
359 *
360 * nemesis.sourceforge.net/browse/lib/static/intmath/ix86/intmath.c.html
361 *
362 * Copyright 1994, University of Cambridge Computer Laboratory
363 * All Rights Reserved.
364 *
365 */
Jesper Juhl77933d72005-07-27 11:46:09 -0700[diff] [blame]366static inline s64 divremdi3(s64 x, s64 y, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]367{
368 u64 a = (x < 0) ? -x : x;
369 u64 b = (y < 0) ? -y : y;
370 u64 res = 0, d = 1;
371
372 if (b > 0) {
373 while (b < a) {
374 b <<= 1;
375 d <<= 1;
376 }
377 }
378
379 do {
380 if ( a >= b ) {
381 a -= b;
382 res += d;
383 }
384 b >>= 1;
385 d >>= 1;
386 }
387 while (d);
388
389 if (PG_DIV == type) {
390 return (((x ^ y) & (1ll<<63)) == 0) ? res : -(s64)res;
391 }
392 else {
393 return ((x & (1ll<<63)) == 0) ? a : -(s64)a;
394 }
395}
396
397/* End of hacks to deal with 64-bit math on x86 */
398
399/** Convert to miliseconds */
400static inline __u64 tv_to_ms(const struct timeval* tv)
401{
402 __u64 ms = tv->tv_usec / 1000;
403 ms += (__u64)tv->tv_sec * (__u64)1000;
404 return ms;
405}
406
407
408/** Convert to micro-seconds */
409static inline __u64 tv_to_us(const struct timeval* tv)
410{
411 __u64 us = tv->tv_usec;
412 us += (__u64)tv->tv_sec * (__u64)1000000;
413 return us;
414}
415
416static inline __u64 pg_div(__u64 n, __u32 base) {
417 __u64 tmp = n;
418 do_div(tmp, base);
419 /* printk("pktgen: pg_div, n: %llu base: %d rv: %llu\n",
420 n, base, tmp); */
421 return tmp;
422}
423
424static inline __u64 pg_div64(__u64 n, __u64 base)
425{
426 __u64 tmp = n;
427/*
428 * How do we know if the architectrure we are running on
429 * supports division with 64 bit base?
430 *
431 */
432#if defined(__sparc_v9__) || defined(__powerpc64__) || defined(__alpha__) || defined(__x86_64__) || defined(__ia64__)
433
434 do_div(tmp, base);
435#else
436 tmp = divremdi3(n, base, PG_DIV);
437#endif
438 return tmp;
439}
440
441static inline u32 pktgen_random(void)
442{
443#if 0
444 __u32 n;
445 get_random_bytes(&n, 4);
446 return n;
447#else
448 return net_random();
449#endif
450}
451
452static inline __u64 getCurMs(void)
453{
454 struct timeval tv;
455 do_gettimeofday(&tv);
456 return tv_to_ms(&tv);
457}
458
459static inline __u64 getCurUs(void)
460{
461 struct timeval tv;
462 do_gettimeofday(&tv);
463 return tv_to_us(&tv);
464}
465
466static inline __u64 tv_diff(const struct timeval* a, const struct timeval* b)
467{
468 return tv_to_us(a) - tv_to_us(b);
469}
470
471
472/* old include end */
473
474static char version[] __initdata = VERSION;
475
476static ssize_t proc_pgctrl_read(struct file* file, char __user * buf, size_t count, loff_t *ppos);
477static ssize_t proc_pgctrl_write(struct file* file, const char __user * buf, size_t count, loff_t *ppos);
478static int proc_if_read(char *buf , char **start, off_t offset, int len, int *eof, void *data);
479
480static int proc_thread_read(char *buf , char **start, off_t offset, int len, int *eof, void *data);
481static int proc_if_write(struct file *file, const char __user *user_buffer, unsigned long count, void *data);
482static int proc_thread_write(struct file *file, const char __user *user_buffer, unsigned long count, void *data);
483static int create_proc_dir(void);
484static int remove_proc_dir(void);
485
486static int pktgen_remove_device(struct pktgen_thread* t, struct pktgen_dev *i);
487static int pktgen_add_device(struct pktgen_thread* t, const char* ifname);
488static struct pktgen_thread* pktgen_find_thread(const char* name);
489static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread* t, const char* ifname);
490static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
491static void pktgen_run_all_threads(void);
492static void pktgen_stop_all_threads_ifs(void);
493static int pktgen_stop_device(struct pktgen_dev *pkt_dev);
494static void pktgen_stop(struct pktgen_thread* t);
495static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
496static struct pktgen_dev *pktgen_NN_threads(const char* dev_name, int remove);
497static unsigned int scan_ip6(const char *s,char ip[16]);
498static unsigned int fmt_ip6(char *s,const char ip[16]);
499
500/* Module parameters, defaults. */
501static int pg_count_d = 1000; /* 1000 pkts by default */
502static int pg_delay_d = 0;
503static int pg_clone_skb_d = 0;
504static int debug = 0;
505
Ingo Molnara9f6a0d2005-09-09 13:10:41 -0700[diff] [blame]506static DEFINE_SPINLOCK(_thread_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]507static struct pktgen_thread *pktgen_threads = NULL;
508
509static char module_fname[128];
510static struct proc_dir_entry *module_proc_ent = NULL;
511
512static struct notifier_block pktgen_notifier_block = {
513 .notifier_call = pktgen_device_event,
514};
515
516static struct file_operations pktgen_fops = {
517 .read = proc_pgctrl_read,
518 .write = proc_pgctrl_write,
519 /* .ioctl = pktgen_ioctl, later maybe */
520};
521
522/*
523 * /proc handling functions
524 *
525 */
526
527static struct proc_dir_entry *pg_proc_dir = NULL;
528static int proc_pgctrl_read_eof=0;
529
530static ssize_t proc_pgctrl_read(struct file* file, char __user * buf,
531 size_t count, loff_t *ppos)
532{
533 char data[200];
534 int len = 0;
535
536 if(proc_pgctrl_read_eof) {
537 proc_pgctrl_read_eof=0;
538 len = 0;
539 goto out;
540 }
541
542 sprintf(data, "%s", VERSION);
543
544 len = strlen(data);
545
546 if(len > count) {
547 len =-EFAULT;
548 goto out;
549 }
550
551 if (copy_to_user(buf, data, len)) {
552 len =-EFAULT;
553 goto out;
554 }
555
556 *ppos += len;
557 proc_pgctrl_read_eof=1; /* EOF next call */
558
559 out:
560 return len;
561}
562
563static ssize_t proc_pgctrl_write(struct file* file,const char __user * buf,
564 size_t count, loff_t *ppos)
565{
566 char *data = NULL;
567 int err = 0;
568
569 if (!capable(CAP_NET_ADMIN)){
570 err = -EPERM;
571 goto out;
572 }
573
574 data = (void*)vmalloc ((unsigned int)count);
575
576 if(!data) {
577 err = -ENOMEM;
578 goto out;
579 }
580 if (copy_from_user(data, buf, count)) {
581 err =-EFAULT;
582 goto out_free;
583 }
584 data[count-1] = 0; /* Make string */
585
586 if (!strcmp(data, "stop"))
587 pktgen_stop_all_threads_ifs();
588
589 else if (!strcmp(data, "start"))
590 pktgen_run_all_threads();
591
592 else
593 printk("pktgen: Unknown command: %s\n", data);
594
595 err = count;
596
597 out_free:
598 vfree (data);
599 out:
600 return err;
601}
602
603static int proc_if_read(char *buf , char **start, off_t offset,
604 int len, int *eof, void *data)
605{
606 char *p;
607 int i;
608 struct pktgen_dev *pkt_dev = (struct pktgen_dev*)(data);
609 __u64 sa;
610 __u64 stopped;
611 __u64 now = getCurUs();
612
613 p = buf;
614 p += sprintf(p, "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
615 (unsigned long long) pkt_dev->count,
616 pkt_dev->min_pkt_size, pkt_dev->max_pkt_size);
617
618 p += sprintf(p, " frags: %d delay: %u clone_skb: %d ifname: %s\n",
619 pkt_dev->nfrags, 1000*pkt_dev->delay_us+pkt_dev->delay_ns, pkt_dev->clone_skb, pkt_dev->ifname);
620
621 p += sprintf(p, " flows: %u flowlen: %u\n", pkt_dev->cflows, pkt_dev->lflow);
622
623
624 if(pkt_dev->flags & F_IPV6) {
625 char b1[128], b2[128], b3[128];
626 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
627 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
628 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
629 p += sprintf(p, " saddr: %s min_saddr: %s max_saddr: %s\n", b1, b2, b3);
630
631 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
632 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
633 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
634 p += sprintf(p, " daddr: %s min_daddr: %s max_daddr: %s\n", b1, b2, b3);
635
636 }
637 else
638 p += sprintf(p, " dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n",
639 pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min, pkt_dev->src_max);
640
641 p += sprintf(p, " src_mac: ");
642
643 if ((pkt_dev->src_mac[0] == 0) &&
644 (pkt_dev->src_mac[1] == 0) &&
645 (pkt_dev->src_mac[2] == 0) &&
646 (pkt_dev->src_mac[3] == 0) &&
647 (pkt_dev->src_mac[4] == 0) &&
648 (pkt_dev->src_mac[5] == 0))
649
650 for (i = 0; i < 6; i++)
651 p += sprintf(p, "%02X%s", pkt_dev->odev->dev_addr[i], i == 5 ? " " : ":");
652
653 else
654 for (i = 0; i < 6; i++)
655 p += sprintf(p, "%02X%s", pkt_dev->src_mac[i], i == 5 ? " " : ":");
656
657 p += sprintf(p, "dst_mac: ");
658 for (i = 0; i < 6; i++)
659 p += sprintf(p, "%02X%s", pkt_dev->dst_mac[i], i == 5 ? "\n" : ":");
660
661 p += sprintf(p, " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n",
662 pkt_dev->udp_src_min, pkt_dev->udp_src_max, pkt_dev->udp_dst_min,
663 pkt_dev->udp_dst_max);
664
665 p += sprintf(p, " src_mac_count: %d dst_mac_count: %d \n Flags: ",
666 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
667
668
669 if (pkt_dev->flags & F_IPV6)
670 p += sprintf(p, "IPV6 ");
671
672 if (pkt_dev->flags & F_IPSRC_RND)
673 p += sprintf(p, "IPSRC_RND ");
674
675 if (pkt_dev->flags & F_IPDST_RND)
676 p += sprintf(p, "IPDST_RND ");
677
678 if (pkt_dev->flags & F_TXSIZE_RND)
679 p += sprintf(p, "TXSIZE_RND ");
680
681 if (pkt_dev->flags & F_UDPSRC_RND)
682 p += sprintf(p, "UDPSRC_RND ");
683
684 if (pkt_dev->flags & F_UDPDST_RND)
685 p += sprintf(p, "UDPDST_RND ");
686
687 if (pkt_dev->flags & F_MACSRC_RND)
688 p += sprintf(p, "MACSRC_RND ");
689
690 if (pkt_dev->flags & F_MACDST_RND)
691 p += sprintf(p, "MACDST_RND ");
692
693
694 p += sprintf(p, "\n");
695
696 sa = pkt_dev->started_at;
697 stopped = pkt_dev->stopped_at;
698 if (pkt_dev->running)
699 stopped = now; /* not really stopped, more like last-running-at */
700
701 p += sprintf(p, "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n",
702 (unsigned long long) pkt_dev->sofar,
703 (unsigned long long) pkt_dev->errors,
704 (unsigned long long) sa,
705 (unsigned long long) stopped,
706 (unsigned long long) pkt_dev->idle_acc);
707
708 p += sprintf(p, " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
709 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, pkt_dev->cur_src_mac_offset);
710
711 if(pkt_dev->flags & F_IPV6) {
712 char b1[128], b2[128];
713 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
714 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
715 p += sprintf(p, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
716 }
717 else
718 p += sprintf(p, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
719 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
720
721
722 p += sprintf(p, " cur_udp_dst: %d cur_udp_src: %d\n",
723 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
724
725 p += sprintf(p, " flows: %u\n", pkt_dev->nflows);
726
727 if (pkt_dev->result[0])
728 p += sprintf(p, "Result: %s\n", pkt_dev->result);
729 else
730 p += sprintf(p, "Result: Idle\n");
731 *eof = 1;
732
733 return p - buf;
734}
735
736
737static int count_trail_chars(const char __user *user_buffer, unsigned int maxlen)
738{
739 int i;
740
741 for (i = 0; i < maxlen; i++) {
742 char c;
743 if (get_user(c, &user_buffer[i]))
744 return -EFAULT;
745 switch (c) {
746 case '\"':
747 case '\n':
748 case '\r':
749 case '\t':
750 case ' ':
751 case '=':
752 break;
753 default:
754 goto done;
755 };
756 }
757done:
758 return i;
759}
760
761static unsigned long num_arg(const char __user *user_buffer, unsigned long maxlen,
762 unsigned long *num)
763{
764 int i = 0;
765 *num = 0;
766
767 for(; i < maxlen; i++) {
768 char c;
769 if (get_user(c, &user_buffer[i]))
770 return -EFAULT;
771 if ((c >= '0') && (c <= '9')) {
772 *num *= 10;
773 *num += c -'0';
774 } else
775 break;
776 }
777 return i;
778}
779
780static int strn_len(const char __user *user_buffer, unsigned int maxlen)
781{
782 int i = 0;
783
784 for(; i < maxlen; i++) {
785 char c;
786 if (get_user(c, &user_buffer[i]))
787 return -EFAULT;
788 switch (c) {
789 case '\"':
790 case '\n':
791 case '\r':
792 case '\t':
793 case ' ':
794 goto done_str;
795 break;
796 default:
797 break;
798 };
799 }
800done_str:
801
802 return i;
803}
804
805static int proc_if_write(struct file *file, const char __user *user_buffer,
806 unsigned long count, void *data)
807{
808 int i = 0, max, len;
809 char name[16], valstr[32];
810 unsigned long value = 0;
811 struct pktgen_dev *pkt_dev = (struct pktgen_dev*)(data);
812 char* pg_result = NULL;
813 int tmp = 0;
814 char buf[128];
815
816 pg_result = &(pkt_dev->result[0]);
817
818 if (count < 1) {
819 printk("pktgen: wrong command format\n");
820 return -EINVAL;
821 }
822
823 max = count - i;
824 tmp = count_trail_chars(&user_buffer[i], max);
825 if (tmp < 0) {
826 printk("pktgen: illegal format\n");
827 return tmp;
828 }
829 i += tmp;
830
831 /* Read variable name */
832
833 len = strn_len(&user_buffer[i], sizeof(name) - 1);
834 if (len < 0) { return len; }
835 memset(name, 0, sizeof(name));
836 if (copy_from_user(name, &user_buffer[i], len) )
837 return -EFAULT;
838 i += len;
839
840 max = count -i;
841 len = count_trail_chars(&user_buffer[i], max);
842 if (len < 0)
843 return len;
844
845 i += len;
846
847 if (debug) {
848 char tb[count + 1];
849 if (copy_from_user(tb, user_buffer, count))
850 return -EFAULT;
851 tb[count] = 0;
852 printk("pktgen: %s,%lu buffer -:%s:-\n", name, count, tb);
853 }
854
855 if (!strcmp(name, "min_pkt_size")) {
856 len = num_arg(&user_buffer[i], 10, &value);
857 if (len < 0) { return len; }
858 i += len;
859 if (value < 14+20+8)
860 value = 14+20+8;
861 if (value != pkt_dev->min_pkt_size) {
862 pkt_dev->min_pkt_size = value;
863 pkt_dev->cur_pkt_size = value;
864 }
865 sprintf(pg_result, "OK: min_pkt_size=%u", pkt_dev->min_pkt_size);
866 return count;
867 }
868
869 if (!strcmp(name, "max_pkt_size")) {
870 len = num_arg(&user_buffer[i], 10, &value);
871 if (len < 0) { return len; }
872 i += len;
873 if (value < 14+20+8)
874 value = 14+20+8;
875 if (value != pkt_dev->max_pkt_size) {
876 pkt_dev->max_pkt_size = value;
877 pkt_dev->cur_pkt_size = value;
878 }
879 sprintf(pg_result, "OK: max_pkt_size=%u", pkt_dev->max_pkt_size);
880 return count;
881 }
882
883 /* Shortcut for min = max */
884
885 if (!strcmp(name, "pkt_size")) {
886 len = num_arg(&user_buffer[i], 10, &value);
887 if (len < 0) { return len; }
888 i += len;
889 if (value < 14+20+8)
890 value = 14+20+8;
891 if (value != pkt_dev->min_pkt_size) {
892 pkt_dev->min_pkt_size = value;
893 pkt_dev->max_pkt_size = value;
894 pkt_dev->cur_pkt_size = value;
895 }
896 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
897 return count;
898 }
899
900 if (!strcmp(name, "debug")) {
901 len = num_arg(&user_buffer[i], 10, &value);
902 if (len < 0) { return len; }
903 i += len;
904 debug = value;
905 sprintf(pg_result, "OK: debug=%u", debug);
906 return count;
907 }
908
909 if (!strcmp(name, "frags")) {
910 len = num_arg(&user_buffer[i], 10, &value);
911 if (len < 0) { return len; }
912 i += len;
913 pkt_dev->nfrags = value;
914 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
915 return count;
916 }
917 if (!strcmp(name, "delay")) {
918 len = num_arg(&user_buffer[i], 10, &value);
919 if (len < 0) { return len; }
920 i += len;
921 if (value == 0x7FFFFFFF) {
922 pkt_dev->delay_us = 0x7FFFFFFF;
923 pkt_dev->delay_ns = 0;
924 } else {
925 pkt_dev->delay_us = value / 1000;
926 pkt_dev->delay_ns = value % 1000;
927 }
928 sprintf(pg_result, "OK: delay=%u", 1000*pkt_dev->delay_us+pkt_dev->delay_ns);
929 return count;
930 }
931 if (!strcmp(name, "udp_src_min")) {
932 len = num_arg(&user_buffer[i], 10, &value);
933 if (len < 0) { return len; }
934 i += len;
935 if (value != pkt_dev->udp_src_min) {
936 pkt_dev->udp_src_min = value;
937 pkt_dev->cur_udp_src = value;
938 }
939 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
940 return count;
941 }
942 if (!strcmp(name, "udp_dst_min")) {
943 len = num_arg(&user_buffer[i], 10, &value);
944 if (len < 0) { return len; }
945 i += len;
946 if (value != pkt_dev->udp_dst_min) {
947 pkt_dev->udp_dst_min = value;
948 pkt_dev->cur_udp_dst = value;
949 }
950 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
951 return count;
952 }
953 if (!strcmp(name, "udp_src_max")) {
954 len = num_arg(&user_buffer[i], 10, &value);
955 if (len < 0) { return len; }
956 i += len;
957 if (value != pkt_dev->udp_src_max) {
958 pkt_dev->udp_src_max = value;
959 pkt_dev->cur_udp_src = value;
960 }
961 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
962 return count;
963 }
964 if (!strcmp(name, "udp_dst_max")) {
965 len = num_arg(&user_buffer[i], 10, &value);
966 if (len < 0) { return len; }
967 i += len;
968 if (value != pkt_dev->udp_dst_max) {
969 pkt_dev->udp_dst_max = value;
970 pkt_dev->cur_udp_dst = value;
971 }
972 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
973 return count;
974 }
975 if (!strcmp(name, "clone_skb")) {
976 len = num_arg(&user_buffer[i], 10, &value);
977 if (len < 0) { return len; }
978 i += len;
979 pkt_dev->clone_skb = value;
980
981 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
982 return count;
983 }
984 if (!strcmp(name, "count")) {
985 len = num_arg(&user_buffer[i], 10, &value);
986 if (len < 0) { return len; }
987 i += len;
988 pkt_dev->count = value;
989 sprintf(pg_result, "OK: count=%llu",
990 (unsigned long long) pkt_dev->count);
991 return count;
992 }
993 if (!strcmp(name, "src_mac_count")) {
994 len = num_arg(&user_buffer[i], 10, &value);
995 if (len < 0) { return len; }
996 i += len;
997 if (pkt_dev->src_mac_count != value) {
998 pkt_dev->src_mac_count = value;
999 pkt_dev->cur_src_mac_offset = 0;
1000 }
1001 sprintf(pg_result, "OK: src_mac_count=%d", pkt_dev->src_mac_count);
1002 return count;
1003 }
1004 if (!strcmp(name, "dst_mac_count")) {
1005 len = num_arg(&user_buffer[i], 10, &value);
1006 if (len < 0) { return len; }
1007 i += len;
1008 if (pkt_dev->dst_mac_count != value) {
1009 pkt_dev->dst_mac_count = value;
1010 pkt_dev->cur_dst_mac_offset = 0;
1011 }
1012 sprintf(pg_result, "OK: dst_mac_count=%d", pkt_dev->dst_mac_count);
1013 return count;
1014 }
1015 if (!strcmp(name, "flag")) {
1016 char f[32];
1017 memset(f, 0, 32);
1018 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1019 if (len < 0) { return len; }
1020 if (copy_from_user(f, &user_buffer[i], len))
1021 return -EFAULT;
1022 i += len;
1023 if (strcmp(f, "IPSRC_RND") == 0)
1024 pkt_dev->flags |= F_IPSRC_RND;
1025
1026 else if (strcmp(f, "!IPSRC_RND") == 0)
1027 pkt_dev->flags &= ~F_IPSRC_RND;
1028
1029 else if (strcmp(f, "TXSIZE_RND") == 0)
1030 pkt_dev->flags |= F_TXSIZE_RND;
1031
1032 else if (strcmp(f, "!TXSIZE_RND") == 0)
1033 pkt_dev->flags &= ~F_TXSIZE_RND;
1034
1035 else if (strcmp(f, "IPDST_RND") == 0)
1036 pkt_dev->flags |= F_IPDST_RND;
1037
1038 else if (strcmp(f, "!IPDST_RND") == 0)
1039 pkt_dev->flags &= ~F_IPDST_RND;
1040
1041 else if (strcmp(f, "UDPSRC_RND") == 0)
1042 pkt_dev->flags |= F_UDPSRC_RND;
1043
1044 else if (strcmp(f, "!UDPSRC_RND") == 0)
1045 pkt_dev->flags &= ~F_UDPSRC_RND;
1046
1047 else if (strcmp(f, "UDPDST_RND") == 0)
1048 pkt_dev->flags |= F_UDPDST_RND;
1049
1050 else if (strcmp(f, "!UDPDST_RND") == 0)
1051 pkt_dev->flags &= ~F_UDPDST_RND;
1052
1053 else if (strcmp(f, "MACSRC_RND") == 0)
1054 pkt_dev->flags |= F_MACSRC_RND;
1055
1056 else if (strcmp(f, "!MACSRC_RND") == 0)
1057 pkt_dev->flags &= ~F_MACSRC_RND;
1058
1059 else if (strcmp(f, "MACDST_RND") == 0)
1060 pkt_dev->flags |= F_MACDST_RND;
1061
1062 else if (strcmp(f, "!MACDST_RND") == 0)
1063 pkt_dev->flags &= ~F_MACDST_RND;
1064
1065 else {
1066 sprintf(pg_result, "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1067 f,
1068 "IPSRC_RND, IPDST_RND, TXSIZE_RND, UDPSRC_RND, UDPDST_RND, MACSRC_RND, MACDST_RND\n");
1069 return count;
1070 }
1071 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1072 return count;
1073 }
1074 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1075 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1076 if (len < 0) { return len; }
1077
1078 if (copy_from_user(buf, &user_buffer[i], len))
1079 return -EFAULT;
1080 buf[len] = 0;
1081 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1082 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1083 strncpy(pkt_dev->dst_min, buf, len);
1084 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1085 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1086 }
1087 if(debug)
1088 printk("pktgen: dst_min set to: %s\n", pkt_dev->dst_min);
1089 i += len;
1090 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1091 return count;
1092 }
1093 if (!strcmp(name, "dst_max")) {
1094 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1095 if (len < 0) { return len; }
1096
1097 if (copy_from_user(buf, &user_buffer[i], len))
1098 return -EFAULT;
1099
1100 buf[len] = 0;
1101 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1102 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1103 strncpy(pkt_dev->dst_max, buf, len);
1104 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1105 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1106 }
1107 if(debug)
1108 printk("pktgen: dst_max set to: %s\n", pkt_dev->dst_max);
1109 i += len;
1110 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1111 return count;
1112 }
1113 if (!strcmp(name, "dst6")) {
1114 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1115 if (len < 0) return len;
1116
1117 pkt_dev->flags |= F_IPV6;
1118
1119 if (copy_from_user(buf, &user_buffer[i], len))
1120 return -EFAULT;
1121 buf[len] = 0;
1122
1123 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1124 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1125
1126 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1127
1128 if(debug)
1129 printk("pktgen: dst6 set to: %s\n", buf);
1130
1131 i += len;
1132 sprintf(pg_result, "OK: dst6=%s", buf);
1133 return count;
1134 }
1135 if (!strcmp(name, "dst6_min")) {
1136 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1137 if (len < 0) return len;
1138
1139 pkt_dev->flags |= F_IPV6;
1140
1141 if (copy_from_user(buf, &user_buffer[i], len))
1142 return -EFAULT;
1143 buf[len] = 0;
1144
1145 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1146 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1147
1148 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->min_in6_daddr);
1149 if(debug)
1150 printk("pktgen: dst6_min set to: %s\n", buf);
1151
1152 i += len;
1153 sprintf(pg_result, "OK: dst6_min=%s", buf);
1154 return count;
1155 }
1156 if (!strcmp(name, "dst6_max")) {
1157 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1158 if (len < 0) return len;
1159
1160 pkt_dev->flags |= F_IPV6;
1161
1162 if (copy_from_user(buf, &user_buffer[i], len))
1163 return -EFAULT;
1164 buf[len] = 0;
1165
1166 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1167 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1168
1169 if(debug)
1170 printk("pktgen: dst6_max set to: %s\n", buf);
1171
1172 i += len;
1173 sprintf(pg_result, "OK: dst6_max=%s", buf);
1174 return count;
1175 }
1176 if (!strcmp(name, "src6")) {
1177 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1178 if (len < 0) return len;
1179
1180 pkt_dev->flags |= F_IPV6;
1181
1182 if (copy_from_user(buf, &user_buffer[i], len))
1183 return -EFAULT;
1184 buf[len] = 0;
1185
1186 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1187 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1188
1189 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1190
1191 if(debug)
1192 printk("pktgen: src6 set to: %s\n", buf);
1193
1194 i += len;
1195 sprintf(pg_result, "OK: src6=%s", buf);
1196 return count;
1197 }
1198 if (!strcmp(name, "src_min")) {
1199 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1200 if (len < 0) { return len; }
1201 if (copy_from_user(buf, &user_buffer[i], len))
1202 return -EFAULT;
1203 buf[len] = 0;
1204 if (strcmp(buf, pkt_dev->src_min) != 0) {
1205 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1206 strncpy(pkt_dev->src_min, buf, len);
1207 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1208 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1209 }
1210 if(debug)
1211 printk("pktgen: src_min set to: %s\n", pkt_dev->src_min);
1212 i += len;
1213 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1214 return count;
1215 }
1216 if (!strcmp(name, "src_max")) {
1217 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1218 if (len < 0) { return len; }
1219 if (copy_from_user(buf, &user_buffer[i], len))
1220 return -EFAULT;
1221 buf[len] = 0;
1222 if (strcmp(buf, pkt_dev->src_max) != 0) {
1223 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1224 strncpy(pkt_dev->src_max, buf, len);
1225 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1226 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1227 }
1228 if(debug)
1229 printk("pktgen: src_max set to: %s\n", pkt_dev->src_max);
1230 i += len;
1231 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1232 return count;
1233 }
1234 if (!strcmp(name, "dst_mac")) {
1235 char *v = valstr;
1236 unsigned char old_dmac[6];
1237 unsigned char *m = pkt_dev->dst_mac;
1238 memcpy(old_dmac, pkt_dev->dst_mac, 6);
1239
1240 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1241 if (len < 0) { return len; }
1242 memset(valstr, 0, sizeof(valstr));
1243 if( copy_from_user(valstr, &user_buffer[i], len))
1244 return -EFAULT;
1245 i += len;
1246
1247 for(*m = 0;*v && m < pkt_dev->dst_mac + 6; v++) {
1248 if (*v >= '0' && *v <= '9') {
1249 *m *= 16;
1250 *m += *v - '0';
1251 }
1252 if (*v >= 'A' && *v <= 'F') {
1253 *m *= 16;
1254 *m += *v - 'A' + 10;
1255 }
1256 if (*v >= 'a' && *v <= 'f') {
1257 *m *= 16;
1258 *m += *v - 'a' + 10;
1259 }
1260 if (*v == ':') {
1261 m++;
1262 *m = 0;
1263 }
1264 }
1265
1266 /* Set up Dest MAC */
1267 if (memcmp(old_dmac, pkt_dev->dst_mac, 6) != 0)
1268 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, 6);
1269
1270 sprintf(pg_result, "OK: dstmac");
1271 return count;
1272 }
1273 if (!strcmp(name, "src_mac")) {
1274 char *v = valstr;
1275 unsigned char *m = pkt_dev->src_mac;
1276
1277 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1278 if (len < 0) { return len; }
1279 memset(valstr, 0, sizeof(valstr));
1280 if( copy_from_user(valstr, &user_buffer[i], len))
1281 return -EFAULT;
1282 i += len;
1283
1284 for(*m = 0;*v && m < pkt_dev->src_mac + 6; v++) {
1285 if (*v >= '0' && *v <= '9') {
1286 *m *= 16;
1287 *m += *v - '0';
1288 }
1289 if (*v >= 'A' && *v <= 'F') {
1290 *m *= 16;
1291 *m += *v - 'A' + 10;
1292 }
1293 if (*v >= 'a' && *v <= 'f') {
1294 *m *= 16;
1295 *m += *v - 'a' + 10;
1296 }
1297 if (*v == ':') {
1298 m++;
1299 *m = 0;
1300 }
1301 }
1302
1303 sprintf(pg_result, "OK: srcmac");
1304 return count;
1305 }
1306
1307 if (!strcmp(name, "clear_counters")) {
1308 pktgen_clear_counters(pkt_dev);
1309 sprintf(pg_result, "OK: Clearing counters.\n");
1310 return count;
1311 }
1312
1313 if (!strcmp(name, "flows")) {
1314 len = num_arg(&user_buffer[i], 10, &value);
1315 if (len < 0) { return len; }
1316 i += len;
1317 if (value > MAX_CFLOWS)
1318 value = MAX_CFLOWS;
1319
1320 pkt_dev->cflows = value;
1321 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1322 return count;
1323 }
1324
1325 if (!strcmp(name, "flowlen")) {
1326 len = num_arg(&user_buffer[i], 10, &value);
1327 if (len < 0) { return len; }
1328 i += len;
1329 pkt_dev->lflow = value;
1330 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1331 return count;
1332 }
1333
1334 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1335 return -EINVAL;
1336}
1337
1338static int proc_thread_read(char *buf , char **start, off_t offset,
1339 int len, int *eof, void *data)
1340{
1341 char *p;
1342 struct pktgen_thread *t = (struct pktgen_thread*)(data);
1343 struct pktgen_dev *pkt_dev = NULL;
1344
1345
1346 if (!t) {
1347 printk("pktgen: ERROR: could not find thread in proc_thread_read\n");
1348 return -EINVAL;
1349 }
1350
1351 p = buf;
1352 p += sprintf(p, "Name: %s max_before_softirq: %d\n",
1353 t->name, t->max_before_softirq);
1354
1355 p += sprintf(p, "Running: ");
1356
1357 if_lock(t);
1358 for(pkt_dev = t->if_list;pkt_dev; pkt_dev = pkt_dev->next)
1359 if(pkt_dev->running)
1360 p += sprintf(p, "%s ", pkt_dev->ifname);
1361
1362 p += sprintf(p, "\nStopped: ");
1363
1364 for(pkt_dev = t->if_list;pkt_dev; pkt_dev = pkt_dev->next)
1365 if(!pkt_dev->running)
1366 p += sprintf(p, "%s ", pkt_dev->ifname);
1367
1368 if (t->result[0])
1369 p += sprintf(p, "\nResult: %s\n", t->result);
1370 else
1371 p += sprintf(p, "\nResult: NA\n");
1372
1373 *eof = 1;
1374
1375 if_unlock(t);
1376
1377 return p - buf;
1378}
1379
1380static int proc_thread_write(struct file *file, const char __user *user_buffer,
1381 unsigned long count, void *data)
1382{
1383 int i = 0, max, len, ret;
1384 char name[40];
1385 struct pktgen_thread *t;
1386 char *pg_result;
1387 unsigned long value = 0;
1388
1389 if (count < 1) {
1390 // sprintf(pg_result, "Wrong command format");
1391 return -EINVAL;
1392 }
1393
1394 max = count - i;
1395 len = count_trail_chars(&user_buffer[i], max);
1396 if (len < 0)
1397 return len;
1398
1399 i += len;
1400
1401 /* Read variable name */
1402
1403 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1404 if (len < 0)
1405 return len;
1406
1407 memset(name, 0, sizeof(name));
1408 if (copy_from_user(name, &user_buffer[i], len))
1409 return -EFAULT;
1410 i += len;
1411
1412 max = count -i;
1413 len = count_trail_chars(&user_buffer[i], max);
1414 if (len < 0)
1415 return len;
1416
1417 i += len;
1418
1419 if (debug)
1420 printk("pktgen: t=%s, count=%lu\n", name, count);
1421
1422
1423 t = (struct pktgen_thread*)(data);
1424 if(!t) {
1425 printk("pktgen: ERROR: No thread\n");
1426 ret = -EINVAL;
1427 goto out;
1428 }
1429
1430 pg_result = &(t->result[0]);
1431
1432 if (!strcmp(name, "add_device")) {
1433 char f[32];
1434 memset(f, 0, 32);
1435 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1436 if (len < 0) {
1437 ret = len;
1438 goto out;
1439 }
1440 if( copy_from_user(f, &user_buffer[i], len) )
1441 return -EFAULT;
1442 i += len;
1443 thread_lock();
1444 pktgen_add_device(t, f);
1445 thread_unlock();
1446 ret = count;
1447 sprintf(pg_result, "OK: add_device=%s", f);
1448 goto out;
1449 }
1450
1451 if (!strcmp(name, "rem_device_all")) {
1452 thread_lock();
1453 t->control |= T_REMDEV;
1454 thread_unlock();
Nishanth Aravamudan121caf52005-09-12 14:15:34 -0700[diff] [blame^]1455 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1456 ret = count;
1457 sprintf(pg_result, "OK: rem_device_all");
1458 goto out;
1459 }
1460
1461 if (!strcmp(name, "max_before_softirq")) {
1462 len = num_arg(&user_buffer[i], 10, &value);
1463 thread_lock();
1464 t->max_before_softirq = value;
1465 thread_unlock();
1466 ret = count;
1467 sprintf(pg_result, "OK: max_before_softirq=%lu", value);
1468 goto out;
1469 }
1470
1471 ret = -EINVAL;
1472 out:
1473
1474 return ret;
1475}
1476
1477static int create_proc_dir(void)
1478{
1479 int len;
1480 /* does proc_dir already exists */
1481 len = strlen(PG_PROC_DIR);
1482
1483 for (pg_proc_dir = proc_net->subdir; pg_proc_dir; pg_proc_dir=pg_proc_dir->next) {
1484 if ((pg_proc_dir->namelen == len) &&
1485 (! memcmp(pg_proc_dir->name, PG_PROC_DIR, len)))
1486 break;
1487 }
1488
1489 if (!pg_proc_dir)
1490 pg_proc_dir = create_proc_entry(PG_PROC_DIR, S_IFDIR, proc_net);
1491
1492 if (!pg_proc_dir)
1493 return -ENODEV;
1494
1495 return 0;
1496}
1497
1498static int remove_proc_dir(void)
1499{
1500 remove_proc_entry(PG_PROC_DIR, proc_net);
1501 return 0;
1502}
1503
1504/* Think find or remove for NN */
1505static struct pktgen_dev *__pktgen_NN_threads(const char* ifname, int remove)
1506{
1507 struct pktgen_thread *t;
1508 struct pktgen_dev *pkt_dev = NULL;
1509
1510 t = pktgen_threads;
1511
1512 while (t) {
1513 pkt_dev = pktgen_find_dev(t, ifname);
1514 if (pkt_dev) {
1515 if(remove) {
1516 if_lock(t);
1517 pktgen_remove_device(t, pkt_dev);
1518 if_unlock(t);
1519 }
1520 break;
1521 }
1522 t = t->next;
1523 }
1524 return pkt_dev;
1525}
1526
1527static struct pktgen_dev *pktgen_NN_threads(const char* ifname, int remove)
1528{
1529 struct pktgen_dev *pkt_dev = NULL;
1530 thread_lock();
1531 pkt_dev = __pktgen_NN_threads(ifname, remove);
1532 thread_unlock();
1533 return pkt_dev;
1534}
1535
1536static int pktgen_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
1537{
1538 struct net_device *dev = (struct net_device *)(ptr);
1539
1540 /* It is OK that we do not hold the group lock right now,
1541 * as we run under the RTNL lock.
1542 */
1543
1544 switch (event) {
1545 case NETDEV_CHANGEADDR:
1546 case NETDEV_GOING_DOWN:
1547 case NETDEV_DOWN:
1548 case NETDEV_UP:
1549 /* Ignore for now */
1550 break;
1551
1552 case NETDEV_UNREGISTER:
1553 pktgen_NN_threads(dev->name, REMOVE);
1554 break;
1555 };
1556
1557 return NOTIFY_DONE;
1558}
1559
1560/* Associate pktgen_dev with a device. */
1561
1562static struct net_device* pktgen_setup_dev(struct pktgen_dev *pkt_dev) {
1563 struct net_device *odev;
1564
1565 /* Clean old setups */
1566
1567 if (pkt_dev->odev) {
1568 dev_put(pkt_dev->odev);
1569 pkt_dev->odev = NULL;
1570 }
1571
1572 odev = dev_get_by_name(pkt_dev->ifname);
1573
1574 if (!odev) {
1575 printk("pktgen: no such netdevice: \"%s\"\n", pkt_dev->ifname);
1576 goto out;
1577 }
1578 if (odev->type != ARPHRD_ETHER) {
1579 printk("pktgen: not an ethernet device: \"%s\"\n", pkt_dev->ifname);
1580 goto out_put;
1581 }
1582 if (!netif_running(odev)) {
1583 printk("pktgen: device is down: \"%s\"\n", pkt_dev->ifname);
1584 goto out_put;
1585 }
1586 pkt_dev->odev = odev;
1587
1588 return pkt_dev->odev;
1589
1590out_put:
1591 dev_put(odev);
1592out:
1593 return NULL;
1594
1595}
1596
1597/* Read pkt_dev from the interface and set up internal pktgen_dev
1598 * structure to have the right information to create/send packets
1599 */
1600static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
1601{
1602 /* Try once more, just in case it works now. */
1603 if (!pkt_dev->odev)
1604 pktgen_setup_dev(pkt_dev);
1605
1606 if (!pkt_dev->odev) {
1607 printk("pktgen: ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1608 sprintf(pkt_dev->result, "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1609 return;
1610 }
1611
1612 /* Default to the interface's mac if not explicitly set. */
1613
1614 if ((pkt_dev->src_mac[0] == 0) &&
1615 (pkt_dev->src_mac[1] == 0) &&
1616 (pkt_dev->src_mac[2] == 0) &&
1617 (pkt_dev->src_mac[3] == 0) &&
1618 (pkt_dev->src_mac[4] == 0) &&
1619 (pkt_dev->src_mac[5] == 0)) {
1620
1621 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, 6);
1622 }
1623 /* Set up Dest MAC */
1624 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, 6);
1625
1626 /* Set up pkt size */
1627 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
1628
1629 if(pkt_dev->flags & F_IPV6) {
1630 /*
1631 * Skip this automatic address setting until locks or functions
1632 * gets exported
1633 */
1634
1635#ifdef NOTNOW
1636 int i, set = 0, err=1;
1637 struct inet6_dev *idev;
1638
1639 for(i=0; i< IN6_ADDR_HSIZE; i++)
1640 if(pkt_dev->cur_in6_saddr.s6_addr[i]) {
1641 set = 1;
1642 break;
1643 }
1644
1645 if(!set) {
1646
1647 /*
1648 * Use linklevel address if unconfigured.
1649 *
1650 * use ipv6_get_lladdr if/when it's get exported
1651 */
1652
1653
1654 read_lock(&addrconf_lock);
1655 if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) {
1656 struct inet6_ifaddr *ifp;
1657
1658 read_lock_bh(&idev->lock);
1659 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
1660 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1661 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &ifp->addr);
1662 err = 0;
1663 break;
1664 }
1665 }
1666 read_unlock_bh(&idev->lock);
1667 }
1668 read_unlock(&addrconf_lock);
1669 if(err) printk("pktgen: ERROR: IPv6 link address not availble.\n");
1670 }
1671#endif
1672 }
1673 else {
1674 pkt_dev->saddr_min = 0;
1675 pkt_dev->saddr_max = 0;
1676 if (strlen(pkt_dev->src_min) == 0) {
1677
1678 struct in_device *in_dev;
1679
1680 rcu_read_lock();
1681 in_dev = __in_dev_get(pkt_dev->odev);
1682 if (in_dev) {
1683 if (in_dev->ifa_list) {
1684 pkt_dev->saddr_min = in_dev->ifa_list->ifa_address;
1685 pkt_dev->saddr_max = pkt_dev->saddr_min;
1686 }
1687 __in_dev_put(in_dev);
1688 }
1689 rcu_read_unlock();
1690 }
1691 else {
1692 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1693 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1694 }
1695
1696 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1697 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1698 }
1699 /* Initialize current values. */
1700 pkt_dev->cur_dst_mac_offset = 0;
1701 pkt_dev->cur_src_mac_offset = 0;
1702 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1703 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1704 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
1705 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
1706 pkt_dev->nflows = 0;
1707}
1708
1709static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us)
1710{
1711 __u64 start;
1712 __u64 now;
1713
1714 start = now = getCurUs();
1715 printk(KERN_INFO "sleeping for %d\n", (int)(spin_until_us - now));
1716 while (now < spin_until_us) {
1717 /* TODO: optimise sleeping behavior */
Nishanth Aravamudan121caf52005-09-12 14:15:34 -0700[diff] [blame^]1718 if (spin_until_us - now > jiffies_to_usecs(1)+1)
1719 schedule_timeout_interruptible(1);
1720 else if (spin_until_us - now > 100) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1721 do_softirq();
1722 if (!pkt_dev->running)
1723 return;
1724 if (need_resched())
1725 schedule();
1726 }
1727
1728 now = getCurUs();
1729 }
1730
1731 pkt_dev->idle_acc += now - start;
1732}
1733
1734
1735/* Increment/randomize headers according to flags and current values
1736 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
1737 */
1738static void mod_cur_headers(struct pktgen_dev *pkt_dev) {
1739 __u32 imn;
1740 __u32 imx;
1741 int flow = 0;
1742
1743 if(pkt_dev->cflows) {
1744 flow = pktgen_random() % pkt_dev->cflows;
1745
1746 if (pkt_dev->flows[flow].count > pkt_dev->lflow)
1747 pkt_dev->flows[flow].count = 0;
1748 }
1749
1750
1751 /* Deal with source MAC */
1752 if (pkt_dev->src_mac_count > 1) {
1753 __u32 mc;
1754 __u32 tmp;
1755
1756 if (pkt_dev->flags & F_MACSRC_RND)
1757 mc = pktgen_random() % (pkt_dev->src_mac_count);
1758 else {
1759 mc = pkt_dev->cur_src_mac_offset++;
1760 if (pkt_dev->cur_src_mac_offset > pkt_dev->src_mac_count)
1761 pkt_dev->cur_src_mac_offset = 0;
1762 }
1763
1764 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
1765 pkt_dev->hh[11] = tmp;
1766 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
1767 pkt_dev->hh[10] = tmp;
1768 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
1769 pkt_dev->hh[9] = tmp;
1770 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
1771 pkt_dev->hh[8] = tmp;
1772 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
1773 pkt_dev->hh[7] = tmp;
1774 }
1775
1776 /* Deal with Destination MAC */
1777 if (pkt_dev->dst_mac_count > 1) {
1778 __u32 mc;
1779 __u32 tmp;
1780
1781 if (pkt_dev->flags & F_MACDST_RND)
1782 mc = pktgen_random() % (pkt_dev->dst_mac_count);
1783
1784 else {
1785 mc = pkt_dev->cur_dst_mac_offset++;
1786 if (pkt_dev->cur_dst_mac_offset > pkt_dev->dst_mac_count) {
1787 pkt_dev->cur_dst_mac_offset = 0;
1788 }
1789 }
1790
1791 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
1792 pkt_dev->hh[5] = tmp;
1793 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
1794 pkt_dev->hh[4] = tmp;
1795 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
1796 pkt_dev->hh[3] = tmp;
1797 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
1798 pkt_dev->hh[2] = tmp;
1799 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
1800 pkt_dev->hh[1] = tmp;
1801 }
1802
1803 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
1804 if (pkt_dev->flags & F_UDPSRC_RND)
1805 pkt_dev->cur_udp_src = ((pktgen_random() % (pkt_dev->udp_src_max - pkt_dev->udp_src_min)) + pkt_dev->udp_src_min);
1806
1807 else {
1808 pkt_dev->cur_udp_src++;
1809 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
1810 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
1811 }
1812 }
1813
1814 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
1815 if (pkt_dev->flags & F_UDPDST_RND) {
1816 pkt_dev->cur_udp_dst = ((pktgen_random() % (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)) + pkt_dev->udp_dst_min);
1817 }
1818 else {
1819 pkt_dev->cur_udp_dst++;
1820 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
1821 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
1822 }
1823 }
1824
1825 if (!(pkt_dev->flags & F_IPV6)) {
1826
1827 if ((imn = ntohl(pkt_dev->saddr_min)) < (imx = ntohl(pkt_dev->saddr_max))) {
1828 __u32 t;
1829 if (pkt_dev->flags & F_IPSRC_RND)
1830 t = ((pktgen_random() % (imx - imn)) + imn);
1831 else {
1832 t = ntohl(pkt_dev->cur_saddr);
1833 t++;
1834 if (t > imx) {
1835 t = imn;
1836 }
1837 }
1838 pkt_dev->cur_saddr = htonl(t);
1839 }
1840
1841 if (pkt_dev->cflows && pkt_dev->flows[flow].count != 0) {
1842 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
1843 } else {
1844
1845 if ((imn = ntohl(pkt_dev->daddr_min)) < (imx = ntohl(pkt_dev->daddr_max))) {
1846 __u32 t;
1847 if (pkt_dev->flags & F_IPDST_RND) {
1848
1849 t = ((pktgen_random() % (imx - imn)) + imn);
1850 t = htonl(t);
1851
1852 while( LOOPBACK(t) || MULTICAST(t) || BADCLASS(t) || ZERONET(t) || LOCAL_MCAST(t) ) {
1853 t = ((pktgen_random() % (imx - imn)) + imn);
1854 t = htonl(t);
1855 }
1856 pkt_dev->cur_daddr = t;
1857 }
1858
1859 else {
1860 t = ntohl(pkt_dev->cur_daddr);
1861 t++;
1862 if (t > imx) {
1863 t = imn;
1864 }
1865 pkt_dev->cur_daddr = htonl(t);
1866 }
1867 }
1868 if(pkt_dev->cflows) {
1869 pkt_dev->flows[flow].cur_daddr = pkt_dev->cur_daddr;
1870 pkt_dev->nflows++;
1871 }
1872 }
1873 }
1874 else /* IPV6 * */
1875 {
1876 if(pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
1877 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
1878 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
1879 pkt_dev->min_in6_daddr.s6_addr32[3] == 0);
1880 else {
1881 int i;
1882
1883 /* Only random destinations yet */
1884
1885 for(i=0; i < 4; i++) {
1886 pkt_dev->cur_in6_daddr.s6_addr32[i] =
1887 ((pktgen_random() |
1888 pkt_dev->min_in6_daddr.s6_addr32[i]) &
1889 pkt_dev->max_in6_daddr.s6_addr32[i]);
1890 }
1891 }
1892 }
1893
1894 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
1895 __u32 t;
1896 if (pkt_dev->flags & F_TXSIZE_RND) {
1897 t = ((pktgen_random() % (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size))
1898 + pkt_dev->min_pkt_size);
1899 }
1900 else {
1901 t = pkt_dev->cur_pkt_size + 1;
1902 if (t > pkt_dev->max_pkt_size)
1903 t = pkt_dev->min_pkt_size;
1904 }
1905 pkt_dev->cur_pkt_size = t;
1906 }
1907
1908 pkt_dev->flows[flow].count++;
1909}
1910
1911
1912static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
1913 struct pktgen_dev *pkt_dev)
1914{
1915 struct sk_buff *skb = NULL;
1916 __u8 *eth;
1917 struct udphdr *udph;
1918 int datalen, iplen;
1919 struct iphdr *iph;
1920 struct pktgen_hdr *pgh = NULL;
1921
Robert Olsson64053be2005-06-26 15:27:10 -0700[diff] [blame]1922 /* Update any of the values, used when we're incrementing various
1923 * fields.
1924 */
1925 mod_cur_headers(pkt_dev);
1926
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1927 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16, GFP_ATOMIC);
1928 if (!skb) {
1929 sprintf(pkt_dev->result, "No memory");
1930 return NULL;
1931 }
1932
1933 skb_reserve(skb, 16);
1934
1935 /* Reserve for ethernet and IP header */
1936 eth = (__u8 *) skb_push(skb, 14);
1937 iph = (struct iphdr *)skb_put(skb, sizeof(struct iphdr));
1938 udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
1939
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1940 memcpy(eth, pkt_dev->hh, 12);
1941 *(u16*)&eth[12] = __constant_htons(ETH_P_IP);
1942
1943 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8; /* Eth + IPh + UDPh */
1944 if (datalen < sizeof(struct pktgen_hdr))
1945 datalen = sizeof(struct pktgen_hdr);
1946
1947 udph->source = htons(pkt_dev->cur_udp_src);
1948 udph->dest = htons(pkt_dev->cur_udp_dst);
1949 udph->len = htons(datalen + 8); /* DATA + udphdr */
1950 udph->check = 0; /* No checksum */
1951
1952 iph->ihl = 5;
1953 iph->version = 4;
1954 iph->ttl = 32;
1955 iph->tos = 0;
1956 iph->protocol = IPPROTO_UDP; /* UDP */
1957 iph->saddr = pkt_dev->cur_saddr;
1958 iph->daddr = pkt_dev->cur_daddr;
1959 iph->frag_off = 0;
1960 iplen = 20 + 8 + datalen;
1961 iph->tot_len = htons(iplen);
1962 iph->check = 0;
1963 iph->check = ip_fast_csum((void *) iph, iph->ihl);
1964 skb->protocol = __constant_htons(ETH_P_IP);
1965 skb->mac.raw = ((u8 *)iph) - 14;
1966 skb->dev = odev;
1967 skb->pkt_type = PACKET_HOST;
1968
1969 if (pkt_dev->nfrags <= 0)
1970 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
1971 else {
1972 int frags = pkt_dev->nfrags;
1973 int i;
1974
1975 pgh = (struct pktgen_hdr*)(((char*)(udph)) + 8);
1976
1977 if (frags > MAX_SKB_FRAGS)
1978 frags = MAX_SKB_FRAGS;
1979 if (datalen > frags*PAGE_SIZE) {
1980 skb_put(skb, datalen-frags*PAGE_SIZE);
1981 datalen = frags*PAGE_SIZE;
1982 }
1983
1984 i = 0;
1985 while (datalen > 0) {
1986 struct page *page = alloc_pages(GFP_KERNEL, 0);
1987 skb_shinfo(skb)->frags[i].page = page;
1988 skb_shinfo(skb)->frags[i].page_offset = 0;
1989 skb_shinfo(skb)->frags[i].size =
1990 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
1991 datalen -= skb_shinfo(skb)->frags[i].size;
1992 skb->len += skb_shinfo(skb)->frags[i].size;
1993 skb->data_len += skb_shinfo(skb)->frags[i].size;
1994 i++;
1995 skb_shinfo(skb)->nr_frags = i;
1996 }
1997
1998 while (i < frags) {
1999 int rem;
2000
2001 if (i == 0)
2002 break;
2003
2004 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2005 if (rem == 0)
2006 break;
2007
2008 skb_shinfo(skb)->frags[i - 1].size -= rem;
2009
2010 skb_shinfo(skb)->frags[i] = skb_shinfo(skb)->frags[i - 1];
2011 get_page(skb_shinfo(skb)->frags[i].page);
2012 skb_shinfo(skb)->frags[i].page = skb_shinfo(skb)->frags[i - 1].page;
2013 skb_shinfo(skb)->frags[i].page_offset += skb_shinfo(skb)->frags[i - 1].size;
2014 skb_shinfo(skb)->frags[i].size = rem;
2015 i++;
2016 skb_shinfo(skb)->nr_frags = i;
2017 }
2018 }
2019
2020 /* Stamp the time, and sequence number, convert them to network byte order */
2021
2022 if (pgh) {
2023 struct timeval timestamp;
2024
2025 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2026 pgh->seq_num = htonl(pkt_dev->seq_num);
2027
2028 do_gettimeofday(&timestamp);
2029 pgh->tv_sec = htonl(timestamp.tv_sec);
2030 pgh->tv_usec = htonl(timestamp.tv_usec);
2031 }
2032 pkt_dev->seq_num++;
2033
2034 return skb;
2035}
2036
2037/*
2038 * scan_ip6, fmt_ip taken from dietlibc-0.21
2039 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2040 *
2041 * Slightly modified for kernel.
2042 * Should be candidate for net/ipv4/utils.c
2043 * --ro
2044 */
2045
2046static unsigned int scan_ip6(const char *s,char ip[16])
2047{
2048 unsigned int i;
2049 unsigned int len=0;
2050 unsigned long u;
2051 char suffix[16];
2052 unsigned int prefixlen=0;
2053 unsigned int suffixlen=0;
2054 __u32 tmp;
2055
2056 for (i=0; i<16; i++) ip[i]=0;
2057
2058 for (;;) {
2059 if (*s == ':') {
2060 len++;
2061 if (s[1] == ':') { /* Found "::", skip to part 2 */
2062 s+=2;
2063 len++;
2064 break;
2065 }
2066 s++;
2067 }
2068 {
2069 char *tmp;
2070 u=simple_strtoul(s,&tmp,16);
2071 i=tmp-s;
2072 }
2073
2074 if (!i) return 0;
2075 if (prefixlen==12 && s[i]=='.') {
2076
2077 /* the last 4 bytes may be written as IPv4 address */
2078
2079 tmp = in_aton(s);
2080 memcpy((struct in_addr*)(ip+12), &tmp, sizeof(tmp));
2081 return i+len;
2082 }
2083 ip[prefixlen++] = (u >> 8);
2084 ip[prefixlen++] = (u & 255);
2085 s += i; len += i;
2086 if (prefixlen==16)
2087 return len;
2088 }
2089
2090/* part 2, after "::" */
2091 for (;;) {
2092 if (*s == ':') {
2093 if (suffixlen==0)
2094 break;
2095 s++;
2096 len++;
2097 } else if (suffixlen!=0)
2098 break;
2099 {
2100 char *tmp;
2101 u=simple_strtol(s,&tmp,16);
2102 i=tmp-s;
2103 }
2104 if (!i) {
2105 if (*s) len--;
2106 break;
2107 }
2108 if (suffixlen+prefixlen<=12 && s[i]=='.') {
2109 tmp = in_aton(s);
2110 memcpy((struct in_addr*)(suffix+suffixlen), &tmp, sizeof(tmp));
2111 suffixlen+=4;
2112 len+=strlen(s);
2113 break;
2114 }
2115 suffix[suffixlen++] = (u >> 8);
2116 suffix[suffixlen++] = (u & 255);
2117 s += i; len += i;
2118 if (prefixlen+suffixlen==16)
2119 break;
2120 }
2121 for (i=0; i<suffixlen; i++)
2122 ip[16-suffixlen+i] = suffix[i];
2123 return len;
2124}
2125
2126static char tohex(char hexdigit) {
2127 return hexdigit>9?hexdigit+'a'-10:hexdigit+'0';
2128}
2129
2130static int fmt_xlong(char* s,unsigned int i) {
2131 char* bak=s;
2132 *s=tohex((i>>12)&0xf); if (s!=bak || *s!='0') ++s;
2133 *s=tohex((i>>8)&0xf); if (s!=bak || *s!='0') ++s;
2134 *s=tohex((i>>4)&0xf); if (s!=bak || *s!='0') ++s;
2135 *s=tohex(i&0xf);
2136 return s-bak+1;
2137}
2138
2139static unsigned int fmt_ip6(char *s,const char ip[16]) {
2140 unsigned int len;
2141 unsigned int i;
2142 unsigned int temp;
2143 unsigned int compressing;
2144 int j;
2145
2146 len = 0; compressing = 0;
2147 for (j=0; j<16; j+=2) {
2148
2149#ifdef V4MAPPEDPREFIX
2150 if (j==12 && !memcmp(ip,V4mappedprefix,12)) {
2151 inet_ntoa_r(*(struct in_addr*)(ip+12),s);
2152 temp=strlen(s);
2153 return len+temp;
2154 }
2155#endif
2156 temp = ((unsigned long) (unsigned char) ip[j] << 8) +
2157 (unsigned long) (unsigned char) ip[j+1];
2158 if (temp == 0) {
2159 if (!compressing) {
2160 compressing=1;
2161 if (j==0) {
2162 *s++=':'; ++len;
2163 }
2164 }
2165 } else {
2166 if (compressing) {
2167 compressing=0;
2168 *s++=':'; ++len;
2169 }
2170 i = fmt_xlong(s,temp); len += i; s += i;
2171 if (j<14) {
2172 *s++ = ':';
2173 ++len;
2174 }
2175 }
2176 }
2177 if (compressing) {
2178 *s++=':'; ++len;
2179 }
2180 *s=0;
2181 return len;
2182}
2183
2184static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2185 struct pktgen_dev *pkt_dev)
2186{
2187 struct sk_buff *skb = NULL;
2188 __u8 *eth;
2189 struct udphdr *udph;
2190 int datalen;
2191 struct ipv6hdr *iph;
2192 struct pktgen_hdr *pgh = NULL;
Robert Olsson64053be2005-06-26 15:27:10 -0700[diff] [blame]2193
2194 /* Update any of the values, used when we're incrementing various
2195 * fields.
2196 */
2197 mod_cur_headers(pkt_dev);
2198
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2199 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16, GFP_ATOMIC);
2200 if (!skb) {
2201 sprintf(pkt_dev->result, "No memory");
2202 return NULL;
2203 }
2204
2205 skb_reserve(skb, 16);
2206
2207 /* Reserve for ethernet and IP header */
2208 eth = (__u8 *) skb_push(skb, 14);
2209 iph = (struct ipv6hdr *)skb_put(skb, sizeof(struct ipv6hdr));
2210 udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
2211
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2212 memcpy(eth, pkt_dev->hh, 12);
2213 *(u16*)&eth[12] = __constant_htons(ETH_P_IPV6);
Robert Olsson64053be2005-06-26 15:27:10 -0700[diff] [blame]2214
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2215 datalen = pkt_dev->cur_pkt_size-14-
2216 sizeof(struct ipv6hdr)-sizeof(struct udphdr); /* Eth + IPh + UDPh */
2217
2218 if (datalen < sizeof(struct pktgen_hdr)) {
2219 datalen = sizeof(struct pktgen_hdr);
2220 if (net_ratelimit())
2221 printk(KERN_INFO "pktgen: increased datalen to %d\n", datalen);
2222 }
2223
2224 udph->source = htons(pkt_dev->cur_udp_src);
2225 udph->dest = htons(pkt_dev->cur_udp_dst);
2226 udph->len = htons(datalen + sizeof(struct udphdr));
2227 udph->check = 0; /* No checksum */
2228
2229 *(u32*)iph = __constant_htonl(0x60000000); /* Version + flow */
2230
2231 iph->hop_limit = 32;
2232
2233 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2234 iph->nexthdr = IPPROTO_UDP;
2235
2236 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2237 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2238
2239 skb->mac.raw = ((u8 *)iph) - 14;
2240 skb->protocol = __constant_htons(ETH_P_IPV6);
2241 skb->dev = odev;
2242 skb->pkt_type = PACKET_HOST;
2243
2244 if (pkt_dev->nfrags <= 0)
2245 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2246 else {
2247 int frags = pkt_dev->nfrags;
2248 int i;
2249
2250 pgh = (struct pktgen_hdr*)(((char*)(udph)) + 8);
2251
2252 if (frags > MAX_SKB_FRAGS)
2253 frags = MAX_SKB_FRAGS;
2254 if (datalen > frags*PAGE_SIZE) {
2255 skb_put(skb, datalen-frags*PAGE_SIZE);
2256 datalen = frags*PAGE_SIZE;
2257 }
2258
2259 i = 0;
2260 while (datalen > 0) {
2261 struct page *page = alloc_pages(GFP_KERNEL, 0);
2262 skb_shinfo(skb)->frags[i].page = page;
2263 skb_shinfo(skb)->frags[i].page_offset = 0;
2264 skb_shinfo(skb)->frags[i].size =
2265 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2266 datalen -= skb_shinfo(skb)->frags[i].size;
2267 skb->len += skb_shinfo(skb)->frags[i].size;
2268 skb->data_len += skb_shinfo(skb)->frags[i].size;
2269 i++;
2270 skb_shinfo(skb)->nr_frags = i;
2271 }
2272
2273 while (i < frags) {
2274 int rem;
2275
2276 if (i == 0)
2277 break;
2278
2279 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2280 if (rem == 0)
2281 break;
2282
2283 skb_shinfo(skb)->frags[i - 1].size -= rem;
2284
2285 skb_shinfo(skb)->frags[i] = skb_shinfo(skb)->frags[i - 1];
2286 get_page(skb_shinfo(skb)->frags[i].page);
2287 skb_shinfo(skb)->frags[i].page = skb_shinfo(skb)->frags[i - 1].page;
2288 skb_shinfo(skb)->frags[i].page_offset += skb_shinfo(skb)->frags[i - 1].size;
2289 skb_shinfo(skb)->frags[i].size = rem;
2290 i++;
2291 skb_shinfo(skb)->nr_frags = i;
2292 }
2293 }
2294
2295 /* Stamp the time, and sequence number, convert them to network byte order */
2296 /* should we update cloned packets too ? */
2297 if (pgh) {
2298 struct timeval timestamp;
2299
2300 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2301 pgh->seq_num = htonl(pkt_dev->seq_num);
2302
2303 do_gettimeofday(&timestamp);
2304 pgh->tv_sec = htonl(timestamp.tv_sec);
2305 pgh->tv_usec = htonl(timestamp.tv_usec);
2306 }
2307 pkt_dev->seq_num++;
2308
2309 return skb;
2310}
2311
2312static inline struct sk_buff *fill_packet(struct net_device *odev,
2313 struct pktgen_dev *pkt_dev)
2314{
2315 if(pkt_dev->flags & F_IPV6)
2316 return fill_packet_ipv6(odev, pkt_dev);
2317 else
2318 return fill_packet_ipv4(odev, pkt_dev);
2319}
2320
2321static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2322{
2323 pkt_dev->seq_num = 1;
2324 pkt_dev->idle_acc = 0;
2325 pkt_dev->sofar = 0;
2326 pkt_dev->tx_bytes = 0;
2327 pkt_dev->errors = 0;
2328}
2329
2330/* Set up structure for sending pkts, clear counters */
2331
2332static void pktgen_run(struct pktgen_thread *t)
2333{
2334 struct pktgen_dev *pkt_dev = NULL;
2335 int started = 0;
2336
2337 PG_DEBUG(printk("pktgen: entering pktgen_run. %p\n", t));
2338
2339 if_lock(t);
2340 for (pkt_dev = t->if_list; pkt_dev; pkt_dev = pkt_dev->next ) {
2341
2342 /*
2343 * setup odev and create initial packet.
2344 */
2345 pktgen_setup_inject(pkt_dev);
2346
2347 if(pkt_dev->odev) {
2348 pktgen_clear_counters(pkt_dev);
2349 pkt_dev->running = 1; /* Cranke yeself! */
2350 pkt_dev->skb = NULL;
2351 pkt_dev->started_at = getCurUs();
2352 pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */
2353 pkt_dev->next_tx_ns = 0;
2354
2355 strcpy(pkt_dev->result, "Starting");
2356 started++;
2357 }
2358 else
2359 strcpy(pkt_dev->result, "Error starting");
2360 }
2361 if_unlock(t);
2362 if(started) t->control &= ~(T_STOP);
2363}
2364
2365static void pktgen_stop_all_threads_ifs(void)
2366{
2367 struct pktgen_thread *t = pktgen_threads;
2368
2369 PG_DEBUG(printk("pktgen: entering pktgen_stop_all_threads.\n"));
2370
2371 thread_lock();
2372 while(t) {
2373 pktgen_stop(t);
2374 t = t->next;
2375 }
2376 thread_unlock();
2377}
2378
2379static int thread_is_running(struct pktgen_thread *t )
2380{
2381 struct pktgen_dev *next;
2382 int res = 0;
2383
2384 for(next=t->if_list; next; next=next->next) {
2385 if(next->running) {
2386 res = 1;
2387 break;
2388 }
2389 }
2390 return res;
2391}
2392
2393static int pktgen_wait_thread_run(struct pktgen_thread *t )
2394{
2395 if_lock(t);
2396
2397 while(thread_is_running(t)) {
2398
2399 if_unlock(t);
2400
2401 msleep_interruptible(100);
2402
2403 if (signal_pending(current))
2404 goto signal;
2405 if_lock(t);
2406 }
2407 if_unlock(t);
2408 return 1;
2409 signal:
2410 return 0;
2411}
2412
2413static int pktgen_wait_all_threads_run(void)
2414{
2415 struct pktgen_thread *t = pktgen_threads;
2416 int sig = 1;
2417
2418 while (t) {
2419 sig = pktgen_wait_thread_run(t);
2420 if( sig == 0 ) break;
2421 thread_lock();
2422 t=t->next;
2423 thread_unlock();
2424 }
2425 if(sig == 0) {
2426 thread_lock();
2427 while (t) {
2428 t->control |= (T_STOP);
2429 t=t->next;
2430 }
2431 thread_unlock();
2432 }
2433 return sig;
2434}
2435
2436static void pktgen_run_all_threads(void)
2437{
2438 struct pktgen_thread *t = pktgen_threads;
2439
2440 PG_DEBUG(printk("pktgen: entering pktgen_run_all_threads.\n"));
2441
2442 thread_lock();
2443
2444 while(t) {
2445 t->control |= (T_RUN);
2446 t = t->next;
2447 }
2448 thread_unlock();
2449
Nishanth Aravamudan121caf52005-09-12 14:15:34 -0700[diff] [blame^]2450 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2451
2452 pktgen_wait_all_threads_run();
2453}
2454
2455
2456static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
2457{
2458 __u64 total_us, bps, mbps, pps, idle;
2459 char *p = pkt_dev->result;
2460
2461 total_us = pkt_dev->stopped_at - pkt_dev->started_at;
2462
2463 idle = pkt_dev->idle_acc;
2464
2465 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
2466 (unsigned long long) total_us,
2467 (unsigned long long)(total_us - idle),
2468 (unsigned long long) idle,
2469 (unsigned long long) pkt_dev->sofar,
2470 pkt_dev->cur_pkt_size, nr_frags);
2471
2472 pps = pkt_dev->sofar * USEC_PER_SEC;
2473
2474 while ((total_us >> 32) != 0) {
2475 pps >>= 1;
2476 total_us >>= 1;
2477 }
2478
2479 do_div(pps, total_us);
2480
2481 bps = pps * 8 * pkt_dev->cur_pkt_size;
2482
2483 mbps = bps;
2484 do_div(mbps, 1000000);
2485 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
2486 (unsigned long long) pps,
2487 (unsigned long long) mbps,
2488 (unsigned long long) bps,
2489 (unsigned long long) pkt_dev->errors);
2490}
2491
2492
2493/* Set stopped-at timer, remove from running list, do counters & statistics */
2494
2495static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
2496{
2497
2498 if (!pkt_dev->running) {
2499 printk("pktgen: interface: %s is already stopped\n", pkt_dev->ifname);
2500 return -EINVAL;
2501 }
2502
2503 pkt_dev->stopped_at = getCurUs();
2504 pkt_dev->running = 0;
2505
2506 show_results(pkt_dev, skb_shinfo(pkt_dev->skb)->nr_frags);
2507
2508 if (pkt_dev->skb)
2509 kfree_skb(pkt_dev->skb);
2510
2511 pkt_dev->skb = NULL;
2512
2513 return 0;
2514}
2515
2516static struct pktgen_dev *next_to_run(struct pktgen_thread *t )
2517{
2518 struct pktgen_dev *next, *best = NULL;
2519
2520 if_lock(t);
2521
2522 for(next=t->if_list; next ; next=next->next) {
2523 if(!next->running) continue;
2524 if(best == NULL) best=next;
2525 else if ( next->next_tx_us < best->next_tx_us)
2526 best = next;
2527 }
2528 if_unlock(t);
2529 return best;
2530}
2531
2532static void pktgen_stop(struct pktgen_thread *t) {
2533 struct pktgen_dev *next = NULL;
2534
2535 PG_DEBUG(printk("pktgen: entering pktgen_stop.\n"));
2536
2537 if_lock(t);
2538
2539 for(next=t->if_list; next; next=next->next)
2540 pktgen_stop_device(next);
2541
2542 if_unlock(t);
2543}
2544
2545static void pktgen_rem_all_ifs(struct pktgen_thread *t)
2546{
2547 struct pktgen_dev *cur, *next = NULL;
2548
2549 /* Remove all devices, free mem */
2550
2551 if_lock(t);
2552
2553 for(cur=t->if_list; cur; cur=next) {
2554 next = cur->next;
2555 pktgen_remove_device(t, cur);
2556 }
2557
2558 if_unlock(t);
2559}
2560
2561static void pktgen_rem_thread(struct pktgen_thread *t)
2562{
2563 /* Remove from the thread list */
2564
2565 struct pktgen_thread *tmp = pktgen_threads;
2566
2567 if (strlen(t->fname))
2568 remove_proc_entry(t->fname, NULL);
2569
2570 thread_lock();
2571
2572 if (tmp == t)
2573 pktgen_threads = tmp->next;
2574 else {
2575 while (tmp) {
2576 if (tmp->next == t) {
2577 tmp->next = t->next;
2578 t->next = NULL;
2579 break;
2580 }
2581 tmp = tmp->next;
2582 }
2583 }
2584 thread_unlock();
2585}
2586
2587static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
2588{
2589 struct net_device *odev = NULL;
2590 __u64 idle_start = 0;
2591 int ret;
2592
2593 odev = pkt_dev->odev;
2594
2595 if (pkt_dev->delay_us || pkt_dev->delay_ns) {
2596 u64 now;
2597
2598 now = getCurUs();
2599 if (now < pkt_dev->next_tx_us)
2600 spin(pkt_dev, pkt_dev->next_tx_us);
2601
2602 /* This is max DELAY, this has special meaning of
2603 * "never transmit"
2604 */
2605 if (pkt_dev->delay_us == 0x7FFFFFFF) {
2606 pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us;
2607 pkt_dev->next_tx_ns = pkt_dev->delay_ns;
2608 goto out;
2609 }
2610 }
2611
2612 if (netif_queue_stopped(odev) || need_resched()) {
2613 idle_start = getCurUs();
2614
2615 if (!netif_running(odev)) {
2616 pktgen_stop_device(pkt_dev);
2617 goto out;
2618 }
2619 if (need_resched())
2620 schedule();
2621
2622 pkt_dev->idle_acc += getCurUs() - idle_start;
2623
2624 if (netif_queue_stopped(odev)) {
2625 pkt_dev->next_tx_us = getCurUs(); /* TODO */
2626 pkt_dev->next_tx_ns = 0;
2627 goto out; /* Try the next interface */
2628 }
2629 }
2630
2631 if (pkt_dev->last_ok || !pkt_dev->skb) {
2632 if ((++pkt_dev->clone_count >= pkt_dev->clone_skb ) || (!pkt_dev->skb)) {
2633 /* build a new pkt */
2634 if (pkt_dev->skb)
2635 kfree_skb(pkt_dev->skb);
2636
2637 pkt_dev->skb = fill_packet(odev, pkt_dev);
2638 if (pkt_dev->skb == NULL) {
2639 printk("pktgen: ERROR: couldn't allocate skb in fill_packet.\n");
2640 schedule();
2641 pkt_dev->clone_count--; /* back out increment, OOM */
2642 goto out;
2643 }
2644 pkt_dev->allocated_skbs++;
2645 pkt_dev->clone_count = 0; /* reset counter */
2646 }
2647 }
2648
2649 spin_lock_bh(&odev->xmit_lock);
2650 if (!netif_queue_stopped(odev)) {
2651
2652 atomic_inc(&(pkt_dev->skb->users));
2653retry_now:
2654 ret = odev->hard_start_xmit(pkt_dev->skb, odev);
2655 if (likely(ret == NETDEV_TX_OK)) {
2656 pkt_dev->last_ok = 1;
2657 pkt_dev->sofar++;
2658 pkt_dev->seq_num++;
2659 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size;
2660
2661 } else if (ret == NETDEV_TX_LOCKED
2662 && (odev->features & NETIF_F_LLTX)) {
2663 cpu_relax();
2664 goto retry_now;
2665 } else { /* Retry it next time */
2666
2667 atomic_dec(&(pkt_dev->skb->users));
2668
2669 if (debug && net_ratelimit())
2670 printk(KERN_INFO "pktgen: Hard xmit error\n");
2671
2672 pkt_dev->errors++;
2673 pkt_dev->last_ok = 0;
2674 }
2675
2676 pkt_dev->next_tx_us = getCurUs();
2677 pkt_dev->next_tx_ns = 0;
2678
2679 pkt_dev->next_tx_us += pkt_dev->delay_us;
2680 pkt_dev->next_tx_ns += pkt_dev->delay_ns;
2681
2682 if (pkt_dev->next_tx_ns > 1000) {
2683 pkt_dev->next_tx_us++;
2684 pkt_dev->next_tx_ns -= 1000;
2685 }
2686 }
2687
2688 else { /* Retry it next time */
2689 pkt_dev->last_ok = 0;
2690 pkt_dev->next_tx_us = getCurUs(); /* TODO */
2691 pkt_dev->next_tx_ns = 0;
2692 }
2693
2694 spin_unlock_bh(&odev->xmit_lock);
2695
2696 /* If pkt_dev->count is zero, then run forever */
2697 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
2698 if (atomic_read(&(pkt_dev->skb->users)) != 1) {
2699 idle_start = getCurUs();
2700 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
2701 if (signal_pending(current)) {
2702 break;
2703 }
2704 schedule();
2705 }
2706 pkt_dev->idle_acc += getCurUs() - idle_start;
2707 }
2708
2709 /* Done with this */
2710 pktgen_stop_device(pkt_dev);
2711 }
2712 out:;
2713 }
2714
2715/*
2716 * Main loop of the thread goes here
2717 */
2718
2719static void pktgen_thread_worker(struct pktgen_thread *t)
2720{
2721 DEFINE_WAIT(wait);
2722 struct pktgen_dev *pkt_dev = NULL;
2723 int cpu = t->cpu;
2724 sigset_t tmpsig;
2725 u32 max_before_softirq;
2726 u32 tx_since_softirq = 0;
2727
2728 daemonize("pktgen/%d", cpu);
2729
2730 /* Block all signals except SIGKILL, SIGSTOP and SIGTERM */
2731
2732 spin_lock_irq(&current->sighand->siglock);
2733 tmpsig = current->blocked;
2734 siginitsetinv(&current->blocked,
2735 sigmask(SIGKILL) |
2736 sigmask(SIGSTOP)|
2737 sigmask(SIGTERM));
2738
2739 recalc_sigpending();
2740 spin_unlock_irq(&current->sighand->siglock);
2741
2742 /* Migrate to the right CPU */
2743 set_cpus_allowed(current, cpumask_of_cpu(cpu));
2744 if (smp_processor_id() != cpu)
2745 BUG();
2746
2747 init_waitqueue_head(&t->queue);
2748
2749 t->control &= ~(T_TERMINATE);
2750 t->control &= ~(T_RUN);
2751 t->control &= ~(T_STOP);
2752 t->control &= ~(T_REMDEV);
2753
2754 t->pid = current->pid;
2755
2756 PG_DEBUG(printk("pktgen: starting pktgen/%d: pid=%d\n", cpu, current->pid));
2757
2758 max_before_softirq = t->max_before_softirq;
2759
2760 __set_current_state(TASK_INTERRUPTIBLE);
2761 mb();
2762
2763 while (1) {
2764
2765 __set_current_state(TASK_RUNNING);
2766
2767 /*
2768 * Get next dev to xmit -- if any.
2769 */
2770
2771 pkt_dev = next_to_run(t);
2772
2773 if (pkt_dev) {
2774
2775 pktgen_xmit(pkt_dev);
2776
2777 /*
2778 * We like to stay RUNNING but must also give
2779 * others fair share.
2780 */
2781
2782 tx_since_softirq += pkt_dev->last_ok;
2783
2784 if (tx_since_softirq > max_before_softirq) {
2785 if (local_softirq_pending())
2786 do_softirq();
2787 tx_since_softirq = 0;
2788 }
2789 } else {
2790 prepare_to_wait(&(t->queue), &wait, TASK_INTERRUPTIBLE);
2791 schedule_timeout(HZ/10);
2792 finish_wait(&(t->queue), &wait);
2793 }
2794
2795 /*
2796 * Back from sleep, either due to the timeout or signal.
2797 * We check if we have any "posted" work for us.
2798 */
2799
2800 if (t->control & T_TERMINATE || signal_pending(current))
2801 /* we received a request to terminate ourself */
2802 break;
2803
2804
2805 if(t->control & T_STOP) {
2806 pktgen_stop(t);
2807 t->control &= ~(T_STOP);
2808 }
2809
2810 if(t->control & T_RUN) {
2811 pktgen_run(t);
2812 t->control &= ~(T_RUN);
2813 }
2814
2815 if(t->control & T_REMDEV) {
2816 pktgen_rem_all_ifs(t);
2817 t->control &= ~(T_REMDEV);
2818 }
2819
2820 if (need_resched())
2821 schedule();
2822 }
2823
2824 PG_DEBUG(printk("pktgen: %s stopping all device\n", t->name));
2825 pktgen_stop(t);
2826
2827 PG_DEBUG(printk("pktgen: %s removing all device\n", t->name));
2828 pktgen_rem_all_ifs(t);
2829
2830 PG_DEBUG(printk("pktgen: %s removing thread.\n", t->name));
2831 pktgen_rem_thread(t);
2832}
2833
2834static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, const char* ifname)
2835{
2836 struct pktgen_dev *pkt_dev = NULL;
2837 if_lock(t);
2838
2839 for(pkt_dev=t->if_list; pkt_dev; pkt_dev = pkt_dev->next ) {
2840 if (strcmp(pkt_dev->ifname, ifname) == 0) {
2841 break;
2842 }
2843 }
2844
2845 if_unlock(t);
2846 PG_DEBUG(printk("pktgen: find_dev(%s) returning %p\n", ifname,pkt_dev));
2847 return pkt_dev;
2848}
2849
2850/*
2851 * Adds a dev at front of if_list.
2852 */
2853
2854static int add_dev_to_thread(struct pktgen_thread *t, struct pktgen_dev *pkt_dev)
2855{
2856 int rv = 0;
2857
2858 if_lock(t);
2859
2860 if (pkt_dev->pg_thread) {
2861 printk("pktgen: ERROR: already assigned to a thread.\n");
2862 rv = -EBUSY;
2863 goto out;
2864 }
2865 pkt_dev->next =t->if_list; t->if_list=pkt_dev;
2866 pkt_dev->pg_thread = t;
2867 pkt_dev->running = 0;
2868
2869 out:
2870 if_unlock(t);
2871 return rv;
2872}
2873
2874/* Called under thread lock */
2875
2876static int pktgen_add_device(struct pktgen_thread *t, const char* ifname)
2877{
2878 struct pktgen_dev *pkt_dev;
2879
2880 /* We don't allow a device to be on several threads */
2881
2882 if( (pkt_dev = __pktgen_NN_threads(ifname, FIND)) == NULL) {
2883
2884 pkt_dev = kmalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
2885 if (!pkt_dev)
2886 return -ENOMEM;
2887
2888 memset(pkt_dev, 0, sizeof(struct pktgen_dev));
2889
2890 pkt_dev->flows = vmalloc(MAX_CFLOWS*sizeof(struct flow_state));
2891 if (pkt_dev->flows == NULL) {
2892 kfree(pkt_dev);
2893 return -ENOMEM;
2894 }
2895 memset(pkt_dev->flows, 0, MAX_CFLOWS*sizeof(struct flow_state));
2896
2897 pkt_dev->min_pkt_size = ETH_ZLEN;
2898 pkt_dev->max_pkt_size = ETH_ZLEN;
2899 pkt_dev->nfrags = 0;
2900 pkt_dev->clone_skb = pg_clone_skb_d;
2901 pkt_dev->delay_us = pg_delay_d / 1000;
2902 pkt_dev->delay_ns = pg_delay_d % 1000;
2903 pkt_dev->count = pg_count_d;
2904 pkt_dev->sofar = 0;
2905 pkt_dev->udp_src_min = 9; /* sink port */
2906 pkt_dev->udp_src_max = 9;
2907 pkt_dev->udp_dst_min = 9;
2908 pkt_dev->udp_dst_max = 9;
2909
2910 strncpy(pkt_dev->ifname, ifname, 31);
2911 sprintf(pkt_dev->fname, "net/%s/%s", PG_PROC_DIR, ifname);
2912
2913 if (! pktgen_setup_dev(pkt_dev)) {
2914 printk("pktgen: ERROR: pktgen_setup_dev failed.\n");
2915 if (pkt_dev->flows)
2916 vfree(pkt_dev->flows);
2917 kfree(pkt_dev);
2918 return -ENODEV;
2919 }
2920
2921 pkt_dev->proc_ent = create_proc_entry(pkt_dev->fname, 0600, NULL);
2922 if (!pkt_dev->proc_ent) {
2923 printk("pktgen: cannot create %s procfs entry.\n", pkt_dev->fname);
2924 if (pkt_dev->flows)
2925 vfree(pkt_dev->flows);
2926 kfree(pkt_dev);
2927 return -EINVAL;
2928 }
2929 pkt_dev->proc_ent->read_proc = proc_if_read;
2930 pkt_dev->proc_ent->write_proc = proc_if_write;
2931 pkt_dev->proc_ent->data = (void*)(pkt_dev);
2932 pkt_dev->proc_ent->owner = THIS_MODULE;
2933
2934 return add_dev_to_thread(t, pkt_dev);
2935 }
2936 else {
2937 printk("pktgen: ERROR: interface already used.\n");
2938 return -EBUSY;
2939 }
2940}
2941
2942static struct pktgen_thread *pktgen_find_thread(const char* name)
2943{
2944 struct pktgen_thread *t = NULL;
2945
2946 thread_lock();
2947
2948 t = pktgen_threads;
2949 while (t) {
2950 if (strcmp(t->name, name) == 0)
2951 break;
2952
2953 t = t->next;
2954 }
2955 thread_unlock();
2956 return t;
2957}
2958
2959static int pktgen_create_thread(const char* name, int cpu)
2960{
2961 struct pktgen_thread *t = NULL;
2962
2963 if (strlen(name) > 31) {
2964 printk("pktgen: ERROR: Thread name cannot be more than 31 characters.\n");
2965 return -EINVAL;
2966 }
2967
2968 if (pktgen_find_thread(name)) {
2969 printk("pktgen: ERROR: thread: %s already exists\n", name);
2970 return -EINVAL;
2971 }
2972
2973 t = (struct pktgen_thread*)(kmalloc(sizeof(struct pktgen_thread), GFP_KERNEL));
2974 if (!t) {
2975 printk("pktgen: ERROR: out of memory, can't create new thread.\n");
2976 return -ENOMEM;
2977 }
2978
2979 memset(t, 0, sizeof(struct pktgen_thread));
2980 strcpy(t->name, name);
2981 spin_lock_init(&t->if_lock);
2982 t->cpu = cpu;
2983
2984 sprintf(t->fname, "net/%s/%s", PG_PROC_DIR, t->name);
2985 t->proc_ent = create_proc_entry(t->fname, 0600, NULL);
2986 if (!t->proc_ent) {
2987 printk("pktgen: cannot create %s procfs entry.\n", t->fname);
2988 kfree(t);
2989 return -EINVAL;
2990 }
2991 t->proc_ent->read_proc = proc_thread_read;
2992 t->proc_ent->write_proc = proc_thread_write;
2993 t->proc_ent->data = (void*)(t);
2994 t->proc_ent->owner = THIS_MODULE;
2995
2996 t->next = pktgen_threads;
2997 pktgen_threads = t;
2998
2999 if (kernel_thread((void *) pktgen_thread_worker, (void *) t,
3000 CLONE_FS | CLONE_FILES | CLONE_SIGHAND) < 0)
3001 printk("pktgen: kernel_thread() failed for cpu %d\n", t->cpu);
3002
3003 return 0;
3004}
3005
3006/*
3007 * Removes a device from the thread if_list.
3008 */
3009static void _rem_dev_from_if_list(struct pktgen_thread *t, struct pktgen_dev *pkt_dev)
3010{
3011 struct pktgen_dev *i, *prev = NULL;
3012
3013 i = t->if_list;
3014
3015 while(i) {
3016 if(i == pkt_dev) {
3017 if(prev) prev->next = i->next;
3018 else t->if_list = NULL;
3019 break;
3020 }
3021 prev = i;
3022 i=i->next;
3023 }
3024}
3025
3026static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *pkt_dev)
3027{
3028
3029 PG_DEBUG(printk("pktgen: remove_device pkt_dev=%p\n", pkt_dev));
3030
3031 if (pkt_dev->running) {
3032 printk("pktgen:WARNING: trying to remove a running interface, stopping it now.\n");
3033 pktgen_stop_device(pkt_dev);
3034 }
3035
3036 /* Dis-associate from the interface */
3037
3038 if (pkt_dev->odev) {
3039 dev_put(pkt_dev->odev);
3040 pkt_dev->odev = NULL;
3041 }
3042
3043 /* And update the thread if_list */
3044
3045 _rem_dev_from_if_list(t, pkt_dev);
3046
3047 /* Clean up proc file system */
3048
3049 if (strlen(pkt_dev->fname))
3050 remove_proc_entry(pkt_dev->fname, NULL);
3051
3052 if (pkt_dev->flows)
3053 vfree(pkt_dev->flows);
3054 kfree(pkt_dev);
3055 return 0;
3056}
3057
3058static int __init pg_init(void)
3059{
3060 int cpu;
3061 printk(version);
3062
3063 module_fname[0] = 0;
3064
3065 create_proc_dir();
3066
3067 sprintf(module_fname, "net/%s/pgctrl", PG_PROC_DIR);
3068 module_proc_ent = create_proc_entry(module_fname, 0600, NULL);
3069 if (!module_proc_ent) {
3070 printk("pktgen: ERROR: cannot create %s procfs entry.\n", module_fname);
3071 return -EINVAL;
3072 }
3073
3074 module_proc_ent->proc_fops = &pktgen_fops;
3075 module_proc_ent->data = NULL;
3076
3077 /* Register us to receive netdevice events */
3078 register_netdevice_notifier(&pktgen_notifier_block);
3079
3080 for (cpu = 0; cpu < NR_CPUS ; cpu++) {
3081 char buf[30];
3082
3083 if (!cpu_online(cpu))
3084 continue;
3085
3086 sprintf(buf, "kpktgend_%i", cpu);
3087 pktgen_create_thread(buf, cpu);
3088 }
3089 return 0;
3090}
3091
3092static void __exit pg_cleanup(void)
3093{
3094 wait_queue_head_t queue;
3095 init_waitqueue_head(&queue);
3096
3097 /* Stop all interfaces & threads */
3098
3099 while (pktgen_threads) {
3100 struct pktgen_thread *t = pktgen_threads;
3101 pktgen_threads->control |= (T_TERMINATE);
3102
3103 wait_event_interruptible_timeout(queue, (t != pktgen_threads), HZ);
3104 }
3105
3106 /* Un-register us from receiving netdevice events */
3107 unregister_netdevice_notifier(&pktgen_notifier_block);
3108
3109 /* Clean up proc file system */
3110
3111 remove_proc_entry(module_fname, NULL);
3112
3113 remove_proc_dir();
3114}
3115
3116
3117module_init(pg_init);
3118module_exit(pg_cleanup);
3119
3120MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se");
3121MODULE_DESCRIPTION("Packet Generator tool");
3122MODULE_LICENSE("GPL");
3123module_param(pg_count_d, int, 0);
3124module_param(pg_delay_d, int, 0);
3125module_param(pg_clone_skb_d, int, 0);
3126module_param(debug, int, 0);