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[NET]: Factor out __dev_alloc_name from dev_alloc_name
[linux-2.6/kmemtrace.git] / net / core / pktgen.c
blob94e42be16daaa00e24da84c786c00ffc3e751708
1 /*
2 * Authors:
3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
4 * Uppsala University and
5 * Swedish University of Agricultural Sciences
6 *
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 * Ben Greear <greearb@candelatech.com>
9 * Jens Låås <jens.laas@data.slu.se>
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 *
16 *
17 * A tool for loading the network with preconfigurated packets.
18 * The tool is implemented as a linux module. Parameters are output
19 * device, delay (to hard_xmit), number of packets, and whether
20 * to use multiple SKBs or just the same one.
21 * pktgen uses the installed interface's output routine.
22 *
23 * Additional hacking by:
24 *
25 * Jens.Laas@data.slu.se
26 * Improved by ANK. 010120.
27 * Improved by ANK even more. 010212.
28 * MAC address typo fixed. 010417 --ro
29 * Integrated. 020301 --DaveM
30 * Added multiskb option 020301 --DaveM
31 * Scaling of results. 020417--sigurdur@linpro.no
32 * Significant re-work of the module:
33 * * Convert to threaded model to more efficiently be able to transmit
34 * and receive on multiple interfaces at once.
35 * * Converted many counters to __u64 to allow longer runs.
36 * * Allow configuration of ranges, like min/max IP address, MACs,
37 * and UDP-ports, for both source and destination, and can
38 * set to use a random distribution or sequentially walk the range.
39 * * Can now change most values after starting.
40 * * Place 12-byte packet in UDP payload with magic number,
41 * sequence number, and timestamp.
42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and
43 * latencies (with micro-second) precision.
44 * * Add IOCTL interface to easily get counters & configuration.
45 * --Ben Greear <greearb@candelatech.com>
46 *
47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
49 * as a "fastpath" with a configurable number of clones after alloc's.
50 * clone_skb=0 means all packets are allocated this also means ranges time
51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
52 * clones.
53 *
54 * Also moved to /proc/net/pktgen/
55 * --ro
56 *
57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
58 * mistakes. Also merged in DaveM's patch in the -pre6 patch.
59 * --Ben Greear <greearb@candelatech.com>
60 *
61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
62 *
63 *
64 * 021124 Finished major redesign and rewrite for new functionality.
65 * See Documentation/networking/pktgen.txt for how to use this.
66 *
67 * The new operation:
68 * For each CPU one thread/process is created at start. This process checks
69 * for running devices in the if_list and sends packets until count is 0 it
70 * also the thread checks the thread->control which is used for inter-process
71 * communication. controlling process "posts" operations to the threads this
72 * way. The if_lock should be possible to remove when add/rem_device is merged
73 * into this too.
74 *
75 * By design there should only be *one* "controlling" process. In practice
76 * multiple write accesses gives unpredictable result. Understood by "write"
77 * to /proc gives result code thats should be read be the "writer".
78 * For practical use this should be no problem.
79 *
80 * Note when adding devices to a specific CPU there good idea to also assign
81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
82 * --ro
83 *
84 * Fix refcount off by one if first packet fails, potential null deref,
85 * memleak 030710- KJP
86 *
87 * First "ranges" functionality for ipv6 030726 --ro
88 *
89 * Included flow support. 030802 ANK.
90 *
91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
92 *
93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
95 *
96 * New xmit() return, do_div and misc clean up by Stephen Hemminger
97 * <shemminger@osdl.org> 040923
98 *
99 * Randy Dunlap fixed u64 printk compiler waring
100 *
101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
103 *
104 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
106 *
107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
108 * 050103
109 *
110 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
111 *
112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
113 *
114 * Fixed src_mac command to set source mac of packet to value specified in
115 * command by Adit Ranadive <adit.262@gmail.com>
116 *
117 */
118 #include <linux/sys.h>
119 #include <linux/types.h>
120 #include <linux/module.h>
121 #include <linux/moduleparam.h>
122 #include <linux/kernel.h>
123 #include <linux/mutex.h>
124 #include <linux/sched.h>
125 #include <linux/slab.h>
126 #include <linux/vmalloc.h>
127 #include <linux/unistd.h>
128 #include <linux/string.h>
129 #include <linux/ptrace.h>
130 #include <linux/errno.h>
131 #include <linux/ioport.h>
132 #include <linux/interrupt.h>
133 #include <linux/capability.h>
134 #include <linux/freezer.h>
135 #include <linux/delay.h>
136 #include <linux/timer.h>
137 #include <linux/list.h>
138 #include <linux/init.h>
139 #include <linux/skbuff.h>
140 #include <linux/netdevice.h>
141 #include <linux/inet.h>
142 #include <linux/inetdevice.h>
143 #include <linux/rtnetlink.h>
144 #include <linux/if_arp.h>
145 #include <linux/if_vlan.h>
146 #include <linux/in.h>
147 #include <linux/ip.h>
148 #include <linux/ipv6.h>
149 #include <linux/udp.h>
150 #include <linux/proc_fs.h>
151 #include <linux/seq_file.h>
152 #include <linux/wait.h>
153 #include <linux/etherdevice.h>
154 #include <linux/kthread.h>
155 #include <net/net_namespace.h>
156 #include <net/checksum.h>
157 #include <net/ipv6.h>
158 #include <net/addrconf.h>
159 #ifdef CONFIG_XFRM
160 #include <net/xfrm.h>
161 #endif
162 #include <asm/byteorder.h>
163 #include <linux/rcupdate.h>
164 #include <asm/bitops.h>
165 #include <asm/io.h>
166 #include <asm/dma.h>
167 #include <asm/uaccess.h>
168 #include <asm/div64.h> /* do_div */
169 #include <asm/timex.h>
170
171 #define VERSION "pktgen v2.69: Packet Generator for packet performance testing.\n"
172
173 /* The buckets are exponential in 'width' */
174 #define LAT_BUCKETS_MAX 32
175 #define IP_NAME_SZ 32
176 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
177 #define MPLS_STACK_BOTTOM htonl(0x00000100)
178
179 /* Device flag bits */
180 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
181 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
182 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
183 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
184 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
185 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
186 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
187 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
188 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
189 #define F_VID_RND (1<<9) /* Random VLAN ID */
190 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
191 #define F_FLOW_SEQ (1<<11) /* Sequential flows */
192 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */
193 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
194
195 /* Thread control flag bits */
196 #define T_TERMINATE (1<<0)
197 #define T_STOP (1<<1) /* Stop run */
198 #define T_RUN (1<<2) /* Start run */
199 #define T_REMDEVALL (1<<3) /* Remove all devs */
200 #define T_REMDEV (1<<4) /* Remove one dev */
201
202 /* If lock -- can be removed after some work */
203 #define if_lock(t) spin_lock(&(t->if_lock));
204 #define if_unlock(t) spin_unlock(&(t->if_lock));
205
206 /* Used to help with determining the pkts on receive */
207 #define PKTGEN_MAGIC 0xbe9be955
208 #define PG_PROC_DIR "pktgen"
209 #define PGCTRL "pgctrl"
210 static struct proc_dir_entry *pg_proc_dir = NULL;
211
212 #define MAX_CFLOWS 65536
213
214 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
215 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
216
217 struct flow_state {
218 __be32 cur_daddr;
219 int count;
220 #ifdef CONFIG_XFRM
221 struct xfrm_state *x;
222 #endif
223 __u32 flags;
224 };
225
226 /* flow flag bits */
227 #define F_INIT (1<<0) /* flow has been initialized */
228
229 struct pktgen_dev {
230 /*
231 * Try to keep frequent/infrequent used vars. separated.
232 */
233 struct proc_dir_entry *entry; /* proc file */
234 struct pktgen_thread *pg_thread;/* the owner */
235 struct list_head list; /* Used for chaining in the thread's run-queue */
236
237 int running; /* if this changes to false, the test will stop */
238
239 /* If min != max, then we will either do a linear iteration, or
240 * we will do a random selection from within the range.
241 */
242 __u32 flags;
243 int removal_mark; /* non-zero => the device is marked for
244 * removal by worker thread */
245
246 int min_pkt_size; /* = ETH_ZLEN; */
247 int max_pkt_size; /* = ETH_ZLEN; */
248 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
249 int nfrags;
250 __u32 delay_us; /* Default delay */
251 __u32 delay_ns;
252 __u64 count; /* Default No packets to send */
253 __u64 sofar; /* How many pkts we've sent so far */
254 __u64 tx_bytes; /* How many bytes we've transmitted */
255 __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */
256
257 /* runtime counters relating to clone_skb */
258 __u64 next_tx_us; /* timestamp of when to tx next */
259 __u32 next_tx_ns;
260
261 __u64 allocated_skbs;
262 __u32 clone_count;
263 int last_ok; /* Was last skb sent?
264 * Or a failed transmit of some sort? This will keep
265 * sequence numbers in order, for example.
266 */
267 __u64 started_at; /* micro-seconds */
268 __u64 stopped_at; /* micro-seconds */
269 __u64 idle_acc; /* micro-seconds */
270 __u32 seq_num;
271
272 int clone_skb; /* Use multiple SKBs during packet gen. If this number
273 * is greater than 1, then that many copies of the same
274 * packet will be sent before a new packet is allocated.
275 * For instance, if you want to send 1024 identical packets
276 * before creating a new packet, set clone_skb to 1024.
277 */
278
279 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
280 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
281 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
282 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
283
284 struct in6_addr in6_saddr;
285 struct in6_addr in6_daddr;
286 struct in6_addr cur_in6_daddr;
287 struct in6_addr cur_in6_saddr;
288 /* For ranges */
289 struct in6_addr min_in6_daddr;
290 struct in6_addr max_in6_daddr;
291 struct in6_addr min_in6_saddr;
292 struct in6_addr max_in6_saddr;
293
294 /* If we're doing ranges, random or incremental, then this
295 * defines the min/max for those ranges.
296 */
297 __be32 saddr_min; /* inclusive, source IP address */
298 __be32 saddr_max; /* exclusive, source IP address */
299 __be32 daddr_min; /* inclusive, dest IP address */
300 __be32 daddr_max; /* exclusive, dest IP address */
301
302 __u16 udp_src_min; /* inclusive, source UDP port */
303 __u16 udp_src_max; /* exclusive, source UDP port */
304 __u16 udp_dst_min; /* inclusive, dest UDP port */
305 __u16 udp_dst_max; /* exclusive, dest UDP port */
306
307 /* DSCP + ECN */
308 __u8 tos; /* six most significant bits of (former) IPv4 TOS are for dscp codepoint */
309 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 (see RFC 3260, sec. 4) */
310
311 /* MPLS */
312 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
313 __be32 labels[MAX_MPLS_LABELS];
314
315 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
316 __u8 vlan_p;
317 __u8 vlan_cfi;
318 __u16 vlan_id; /* 0xffff means no vlan tag */
319
320 __u8 svlan_p;
321 __u8 svlan_cfi;
322 __u16 svlan_id; /* 0xffff means no svlan tag */
323
324 __u32 src_mac_count; /* How many MACs to iterate through */
325 __u32 dst_mac_count; /* How many MACs to iterate through */
326
327 unsigned char dst_mac[ETH_ALEN];
328 unsigned char src_mac[ETH_ALEN];
329
330 __u32 cur_dst_mac_offset;
331 __u32 cur_src_mac_offset;
332 __be32 cur_saddr;
333 __be32 cur_daddr;
334 __u16 cur_udp_dst;
335 __u16 cur_udp_src;
336 __u16 cur_queue_map;
337 __u32 cur_pkt_size;
338
339 __u8 hh[14];
340 /* = {
341 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
342
343 We fill in SRC address later
344 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
345 0x08, 0x00
346 };
347 */
348 __u16 pad; /* pad out the hh struct to an even 16 bytes */
349
350 struct sk_buff *skb; /* skb we are to transmit next, mainly used for when we
351 * are transmitting the same one multiple times
352 */
353 struct net_device *odev; /* The out-going device. Note that the device should
354 * have it's pg_info pointer pointing back to this
355 * device. This will be set when the user specifies
356 * the out-going device name (not when the inject is
357 * started as it used to do.)
358 */
359 struct flow_state *flows;
360 unsigned cflows; /* Concurrent flows (config) */
361 unsigned lflow; /* Flow length (config) */
362 unsigned nflows; /* accumulated flows (stats) */
363 unsigned curfl; /* current sequenced flow (state)*/
364
365 u16 queue_map_min;
366 u16 queue_map_max;
367
368 #ifdef CONFIG_XFRM
369 __u8 ipsmode; /* IPSEC mode (config) */
370 __u8 ipsproto; /* IPSEC type (config) */
371 #endif
372 char result[512];
373 };
374
375 struct pktgen_hdr {
376 __be32 pgh_magic;
377 __be32 seq_num;
378 __be32 tv_sec;
379 __be32 tv_usec;
380 };
381
382 struct pktgen_thread {
383 spinlock_t if_lock;
384 struct list_head if_list; /* All device here */
385 struct list_head th_list;
386 struct task_struct *tsk;
387 char result[512];
388
389 /* Field for thread to receive "posted" events terminate, stop ifs etc. */
390
391 u32 control;
392 int cpu;
393
394 wait_queue_head_t queue;
395 };
396
397 #define REMOVE 1
398 #define FIND 0
399
400 /* This code works around the fact that do_div cannot handle two 64-bit
401 numbers, and regular 64-bit division doesn't work on x86 kernels.
402 --Ben
403 */
404
405 #define PG_DIV 0
406
407 /* This was emailed to LMKL by: Chris Caputo <ccaputo@alt.net>
408 * Function copied/adapted/optimized from:
409 *
410 * nemesis.sourceforge.net/browse/lib/static/intmath/ix86/intmath.c.html
411 *
412 * Copyright 1994, University of Cambridge Computer Laboratory
413 * All Rights Reserved.
414 *
415 */
416 static inline s64 divremdi3(s64 x, s64 y, int type)
417 {
418 u64 a = (x < 0) ? -x : x;
419 u64 b = (y < 0) ? -y : y;
420 u64 res = 0, d = 1;
421
422 if (b > 0) {
423 while (b < a) {
424 b <<= 1;
425 d <<= 1;
426 }
427 }
428
429 do {
430 if (a >= b) {
431 a -= b;
432 res += d;
433 }
434 b >>= 1;
435 d >>= 1;
436 }
437 while (d);
438
439 if (PG_DIV == type) {
440 return (((x ^ y) & (1ll << 63)) == 0) ? res : -(s64) res;
441 } else {
442 return ((x & (1ll << 63)) == 0) ? a : -(s64) a;
443 }
444 }
445
446 /* End of hacks to deal with 64-bit math on x86 */
447
448 /** Convert to milliseconds */
449 static inline __u64 tv_to_ms(const struct timeval *tv)
450 {
451 __u64 ms = tv->tv_usec / 1000;
452 ms += (__u64) tv->tv_sec * (__u64) 1000;
453 return ms;
454 }
455
456 /** Convert to micro-seconds */
457 static inline __u64 tv_to_us(const struct timeval *tv)
458 {
459 __u64 us = tv->tv_usec;
460 us += (__u64) tv->tv_sec * (__u64) 1000000;
461 return us;
462 }
463
464 static inline __u64 pg_div(__u64 n, __u32 base)
465 {
466 __u64 tmp = n;
467 do_div(tmp, base);
468 /* printk("pktgen: pg_div, n: %llu base: %d rv: %llu\n",
469 n, base, tmp); */
470 return tmp;
471 }
472
473 static inline __u64 pg_div64(__u64 n, __u64 base)
474 {
475 __u64 tmp = n;
476 /*
477 * How do we know if the architecture we are running on
478 * supports division with 64 bit base?
479 *
480 */
481 #if defined(__sparc_v9__) || defined(__powerpc64__) || defined(__alpha__) || defined(__x86_64__) || defined(__ia64__)
482
483 do_div(tmp, base);
484 #else
485 tmp = divremdi3(n, base, PG_DIV);
486 #endif
487 return tmp;
488 }
489
490 static inline __u64 getCurMs(void)
491 {
492 struct timeval tv;
493 do_gettimeofday(&tv);
494 return tv_to_ms(&tv);
495 }
496
497 static inline __u64 getCurUs(void)
498 {
499 struct timeval tv;
500 do_gettimeofday(&tv);
501 return tv_to_us(&tv);
502 }
503
504 static inline __u64 tv_diff(const struct timeval *a, const struct timeval *b)
505 {
506 return tv_to_us(a) - tv_to_us(b);
507 }
508
509 /* old include end */
510
511 static char version[] __initdata = VERSION;
512
513 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
514 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
515 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
516 const char *ifname);
517 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
518 static void pktgen_run_all_threads(void);
519 static void pktgen_stop_all_threads_ifs(void);
520 static int pktgen_stop_device(struct pktgen_dev *pkt_dev);
521 static void pktgen_stop(struct pktgen_thread *t);
522 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
523
524 static unsigned int scan_ip6(const char *s, char ip[16]);
525 static unsigned int fmt_ip6(char *s, const char ip[16]);
526
527 /* Module parameters, defaults. */
528 static int pg_count_d = 1000; /* 1000 pkts by default */
529 static int pg_delay_d;
530 static int pg_clone_skb_d;
531 static int debug;
532
533 static DEFINE_MUTEX(pktgen_thread_lock);
534 static LIST_HEAD(pktgen_threads);
535
536 static struct notifier_block pktgen_notifier_block = {
537 .notifier_call = pktgen_device_event,
538 };
539
540 /*
541 * /proc handling functions
542 *
543 */
544
545 static int pgctrl_show(struct seq_file *seq, void *v)
546 {
547 seq_puts(seq, VERSION);
548 return 0;
549 }
550
551 static ssize_t pgctrl_write(struct file *file, const char __user * buf,
552 size_t count, loff_t * ppos)
553 {
554 int err = 0;
555 char data[128];
556
557 if (!capable(CAP_NET_ADMIN)) {
558 err = -EPERM;
559 goto out;
560 }
561
562 if (count > sizeof(data))
563 count = sizeof(data);
564
565 if (copy_from_user(data, buf, count)) {
566 err = -EFAULT;
567 goto out;
568 }
569 data[count - 1] = 0; /* Make string */
570
571 if (!strcmp(data, "stop"))
572 pktgen_stop_all_threads_ifs();
573
574 else if (!strcmp(data, "start"))
575 pktgen_run_all_threads();
576
577 else
578 printk(KERN_WARNING "pktgen: Unknown command: %s\n", data);
579
580 err = count;
581
582 out:
583 return err;
584 }
585
586 static int pgctrl_open(struct inode *inode, struct file *file)
587 {
588 return single_open(file, pgctrl_show, PDE(inode)->data);
589 }
590
591 static const struct file_operations pktgen_fops = {
592 .owner = THIS_MODULE,
593 .open = pgctrl_open,
594 .read = seq_read,
595 .llseek = seq_lseek,
596 .write = pgctrl_write,
597 .release = single_release,
598 };
599
600 static int pktgen_if_show(struct seq_file *seq, void *v)
601 {
602 int i;
603 struct pktgen_dev *pkt_dev = seq->private;
604 __u64 sa;
605 __u64 stopped;
606 __u64 now = getCurUs();
607
608 seq_printf(seq,
609 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
610 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
611 pkt_dev->max_pkt_size);
612
613 seq_printf(seq,
614 " frags: %d delay: %u clone_skb: %d ifname: %s\n",
615 pkt_dev->nfrags,
616 1000 * pkt_dev->delay_us + pkt_dev->delay_ns,
617 pkt_dev->clone_skb, pkt_dev->odev->name);
618
619 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
620 pkt_dev->lflow);
621
622 seq_printf(seq,
623 " queue_map_min: %u queue_map_max: %u\n",
624 pkt_dev->queue_map_min,
625 pkt_dev->queue_map_max);
626
627 if (pkt_dev->flags & F_IPV6) {
628 char b1[128], b2[128], b3[128];
629 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
630 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
631 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
632 seq_printf(seq,
633 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
634 b2, b3);
635
636 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
637 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
638 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
639 seq_printf(seq,
640 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
641 b2, b3);
642
643 } else
644 seq_printf(seq,
645 " dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n",
646 pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min,
647 pkt_dev->src_max);
648
649 seq_puts(seq, " src_mac: ");
650
651 if (is_zero_ether_addr(pkt_dev->src_mac))
652 for (i = 0; i < 6; i++)
653 seq_printf(seq, "%02X%s", pkt_dev->odev->dev_addr[i],
654 i == 5 ? " " : ":");
655 else
656 for (i = 0; i < 6; i++)
657 seq_printf(seq, "%02X%s", pkt_dev->src_mac[i],
658 i == 5 ? " " : ":");
659
660 seq_printf(seq, "dst_mac: ");
661 for (i = 0; i < 6; i++)
662 seq_printf(seq, "%02X%s", pkt_dev->dst_mac[i],
663 i == 5 ? "\n" : ":");
664
665 seq_printf(seq,
666 " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n",
667 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
668 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
669
670 seq_printf(seq,
671 " src_mac_count: %d dst_mac_count: %d\n",
672 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
673
674 if (pkt_dev->nr_labels) {
675 unsigned i;
676 seq_printf(seq, " mpls: ");
677 for (i = 0; i < pkt_dev->nr_labels; i++)
678 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
679 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
680 }
681
682 if (pkt_dev->vlan_id != 0xffff) {
683 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
684 pkt_dev->vlan_id, pkt_dev->vlan_p, pkt_dev->vlan_cfi);
685 }
686
687 if (pkt_dev->svlan_id != 0xffff) {
688 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
689 pkt_dev->svlan_id, pkt_dev->svlan_p, pkt_dev->svlan_cfi);
690 }
691
692 if (pkt_dev->tos) {
693 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
694 }
695
696 if (pkt_dev->traffic_class) {
697 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
698 }
699
700 seq_printf(seq, " Flags: ");
701
702 if (pkt_dev->flags & F_IPV6)
703 seq_printf(seq, "IPV6 ");
704
705 if (pkt_dev->flags & F_IPSRC_RND)
706 seq_printf(seq, "IPSRC_RND ");
707
708 if (pkt_dev->flags & F_IPDST_RND)
709 seq_printf(seq, "IPDST_RND ");
710
711 if (pkt_dev->flags & F_TXSIZE_RND)
712 seq_printf(seq, "TXSIZE_RND ");
713
714 if (pkt_dev->flags & F_UDPSRC_RND)
715 seq_printf(seq, "UDPSRC_RND ");
716
717 if (pkt_dev->flags & F_UDPDST_RND)
718 seq_printf(seq, "UDPDST_RND ");
719
720 if (pkt_dev->flags & F_MPLS_RND)
721 seq_printf(seq, "MPLS_RND ");
722
723 if (pkt_dev->flags & F_QUEUE_MAP_RND)
724 seq_printf(seq, "QUEUE_MAP_RND ");
725
726 if (pkt_dev->cflows) {
727 if (pkt_dev->flags & F_FLOW_SEQ)
728 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
729 else
730 seq_printf(seq, "FLOW_RND ");
731 }
732
733 #ifdef CONFIG_XFRM
734 if (pkt_dev->flags & F_IPSEC_ON)
735 seq_printf(seq, "IPSEC ");
736 #endif
737
738 if (pkt_dev->flags & F_MACSRC_RND)
739 seq_printf(seq, "MACSRC_RND ");
740
741 if (pkt_dev->flags & F_MACDST_RND)
742 seq_printf(seq, "MACDST_RND ");
743
744 if (pkt_dev->flags & F_VID_RND)
745 seq_printf(seq, "VID_RND ");
746
747 if (pkt_dev->flags & F_SVID_RND)
748 seq_printf(seq, "SVID_RND ");
749
750 seq_puts(seq, "\n");
751
752 sa = pkt_dev->started_at;
753 stopped = pkt_dev->stopped_at;
754 if (pkt_dev->running)
755 stopped = now; /* not really stopped, more like last-running-at */
756
757 seq_printf(seq,
758 "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n",
759 (unsigned long long)pkt_dev->sofar,
760 (unsigned long long)pkt_dev->errors, (unsigned long long)sa,
761 (unsigned long long)stopped,
762 (unsigned long long)pkt_dev->idle_acc);
763
764 seq_printf(seq,
765 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
766 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
767 pkt_dev->cur_src_mac_offset);
768
769 if (pkt_dev->flags & F_IPV6) {
770 char b1[128], b2[128];
771 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
772 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
773 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
774 } else
775 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
776 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
777
778 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
779 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
780
781 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
782
783 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
784
785 if (pkt_dev->result[0])
786 seq_printf(seq, "Result: %s\n", pkt_dev->result);
787 else
788 seq_printf(seq, "Result: Idle\n");
789
790 return 0;
791 }
792
793
794 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, __u32 *num)
795 {
796 int i = 0;
797 *num = 0;
798
799 for (; i < maxlen; i++) {
800 char c;
801 *num <<= 4;
802 if (get_user(c, &user_buffer[i]))
803 return -EFAULT;
804 if ((c >= '0') && (c <= '9'))
805 *num |= c - '0';
806 else if ((c >= 'a') && (c <= 'f'))
807 *num |= c - 'a' + 10;
808 else if ((c >= 'A') && (c <= 'F'))
809 *num |= c - 'A' + 10;
810 else
811 break;
812 }
813 return i;
814 }
815
816 static int count_trail_chars(const char __user * user_buffer,
817 unsigned int maxlen)
818 {
819 int i;
820
821 for (i = 0; i < maxlen; i++) {
822 char c;
823 if (get_user(c, &user_buffer[i]))
824 return -EFAULT;
825 switch (c) {
826 case '\"':
827 case '\n':
828 case '\r':
829 case '\t':
830 case ' ':
831 case '=':
832 break;
833 default:
834 goto done;
835 }
836 }
837 done:
838 return i;
839 }
840
841 static unsigned long num_arg(const char __user * user_buffer,
842 unsigned long maxlen, unsigned long *num)
843 {
844 int i = 0;
845 *num = 0;
846
847 for (; i < maxlen; i++) {
848 char c;
849 if (get_user(c, &user_buffer[i]))
850 return -EFAULT;
851 if ((c >= '0') && (c <= '9')) {
852 *num *= 10;
853 *num += c - '0';
854 } else
855 break;
856 }
857 return i;
858 }
859
860 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
861 {
862 int i = 0;
863
864 for (; i < maxlen; i++) {
865 char c;
866 if (get_user(c, &user_buffer[i]))
867 return -EFAULT;
868 switch (c) {
869 case '\"':
870 case '\n':
871 case '\r':
872 case '\t':
873 case ' ':
874 goto done_str;
875 break;
876 default:
877 break;
878 }
879 }
880 done_str:
881 return i;
882 }
883
884 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
885 {
886 unsigned n = 0;
887 char c;
888 ssize_t i = 0;
889 int len;
890
891 pkt_dev->nr_labels = 0;
892 do {
893 __u32 tmp;
894 len = hex32_arg(&buffer[i], 8, &tmp);
895 if (len <= 0)
896 return len;
897 pkt_dev->labels[n] = htonl(tmp);
898 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
899 pkt_dev->flags |= F_MPLS_RND;
900 i += len;
901 if (get_user(c, &buffer[i]))
902 return -EFAULT;
903 i++;
904 n++;
905 if (n >= MAX_MPLS_LABELS)
906 return -E2BIG;
907 } while (c == ',');
908
909 pkt_dev->nr_labels = n;
910 return i;
911 }
912
913 static ssize_t pktgen_if_write(struct file *file,
914 const char __user * user_buffer, size_t count,
915 loff_t * offset)
916 {
917 struct seq_file *seq = (struct seq_file *)file->private_data;
918 struct pktgen_dev *pkt_dev = seq->private;
919 int i = 0, max, len;
920 char name[16], valstr[32];
921 unsigned long value = 0;
922 char *pg_result = NULL;
923 int tmp = 0;
924 char buf[128];
925
926 pg_result = &(pkt_dev->result[0]);
927
928 if (count < 1) {
929 printk(KERN_WARNING "pktgen: wrong command format\n");
930 return -EINVAL;
931 }
932
933 max = count - i;
934 tmp = count_trail_chars(&user_buffer[i], max);
935 if (tmp < 0) {
936 printk(KERN_WARNING "pktgen: illegal format\n");
937 return tmp;
938 }
939 i += tmp;
940
941 /* Read variable name */
942
943 len = strn_len(&user_buffer[i], sizeof(name) - 1);
944 if (len < 0) {
945 return len;
946 }
947 memset(name, 0, sizeof(name));
948 if (copy_from_user(name, &user_buffer[i], len))
949 return -EFAULT;
950 i += len;
951
952 max = count - i;
953 len = count_trail_chars(&user_buffer[i], max);
954 if (len < 0)
955 return len;
956
957 i += len;
958
959 if (debug) {
960 char tb[count + 1];
961 if (copy_from_user(tb, user_buffer, count))
962 return -EFAULT;
963 tb[count] = 0;
964 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name,
965 (unsigned long)count, tb);
966 }
967
968 if (!strcmp(name, "min_pkt_size")) {
969 len = num_arg(&user_buffer[i], 10, &value);
970 if (len < 0) {
971 return len;
972 }
973 i += len;
974 if (value < 14 + 20 + 8)
975 value = 14 + 20 + 8;
976 if (value != pkt_dev->min_pkt_size) {
977 pkt_dev->min_pkt_size = value;
978 pkt_dev->cur_pkt_size = value;
979 }
980 sprintf(pg_result, "OK: min_pkt_size=%u",
981 pkt_dev->min_pkt_size);
982 return count;
983 }
984
985 if (!strcmp(name, "max_pkt_size")) {
986 len = num_arg(&user_buffer[i], 10, &value);
987 if (len < 0) {
988 return len;
989 }
990 i += len;
991 if (value < 14 + 20 + 8)
992 value = 14 + 20 + 8;
993 if (value != pkt_dev->max_pkt_size) {
994 pkt_dev->max_pkt_size = value;
995 pkt_dev->cur_pkt_size = value;
996 }
997 sprintf(pg_result, "OK: max_pkt_size=%u",
998 pkt_dev->max_pkt_size);
999 return count;
1000 }
1001
1002 /* Shortcut for min = max */
1003
1004 if (!strcmp(name, "pkt_size")) {
1005 len = num_arg(&user_buffer[i], 10, &value);
1006 if (len < 0) {
1007 return len;
1008 }
1009 i += len;
1010 if (value < 14 + 20 + 8)
1011 value = 14 + 20 + 8;
1012 if (value != pkt_dev->min_pkt_size) {
1013 pkt_dev->min_pkt_size = value;
1014 pkt_dev->max_pkt_size = value;
1015 pkt_dev->cur_pkt_size = value;
1016 }
1017 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
1018 return count;
1019 }
1020
1021 if (!strcmp(name, "debug")) {
1022 len = num_arg(&user_buffer[i], 10, &value);
1023 if (len < 0) {
1024 return len;
1025 }
1026 i += len;
1027 debug = value;
1028 sprintf(pg_result, "OK: debug=%u", debug);
1029 return count;
1030 }
1031
1032 if (!strcmp(name, "frags")) {
1033 len = num_arg(&user_buffer[i], 10, &value);
1034 if (len < 0) {
1035 return len;
1036 }
1037 i += len;
1038 pkt_dev->nfrags = value;
1039 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
1040 return count;
1041 }
1042 if (!strcmp(name, "delay")) {
1043 len = num_arg(&user_buffer[i], 10, &value);
1044 if (len < 0) {
1045 return len;
1046 }
1047 i += len;
1048 if (value == 0x7FFFFFFF) {
1049 pkt_dev->delay_us = 0x7FFFFFFF;
1050 pkt_dev->delay_ns = 0;
1051 } else {
1052 pkt_dev->delay_us = value / 1000;
1053 pkt_dev->delay_ns = value % 1000;
1054 }
1055 sprintf(pg_result, "OK: delay=%u",
1056 1000 * pkt_dev->delay_us + pkt_dev->delay_ns);
1057 return count;
1058 }
1059 if (!strcmp(name, "udp_src_min")) {
1060 len = num_arg(&user_buffer[i], 10, &value);
1061 if (len < 0) {
1062 return len;
1063 }
1064 i += len;
1065 if (value != pkt_dev->udp_src_min) {
1066 pkt_dev->udp_src_min = value;
1067 pkt_dev->cur_udp_src = value;
1068 }
1069 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1070 return count;
1071 }
1072 if (!strcmp(name, "udp_dst_min")) {
1073 len = num_arg(&user_buffer[i], 10, &value);
1074 if (len < 0) {
1075 return len;
1076 }
1077 i += len;
1078 if (value != pkt_dev->udp_dst_min) {
1079 pkt_dev->udp_dst_min = value;
1080 pkt_dev->cur_udp_dst = value;
1081 }
1082 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1083 return count;
1084 }
1085 if (!strcmp(name, "udp_src_max")) {
1086 len = num_arg(&user_buffer[i], 10, &value);
1087 if (len < 0) {
1088 return len;
1089 }
1090 i += len;
1091 if (value != pkt_dev->udp_src_max) {
1092 pkt_dev->udp_src_max = value;
1093 pkt_dev->cur_udp_src = value;
1094 }
1095 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1096 return count;
1097 }
1098 if (!strcmp(name, "udp_dst_max")) {
1099 len = num_arg(&user_buffer[i], 10, &value);
1100 if (len < 0) {
1101 return len;
1102 }
1103 i += len;
1104 if (value != pkt_dev->udp_dst_max) {
1105 pkt_dev->udp_dst_max = value;
1106 pkt_dev->cur_udp_dst = value;
1107 }
1108 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1109 return count;
1110 }
1111 if (!strcmp(name, "clone_skb")) {
1112 len = num_arg(&user_buffer[i], 10, &value);
1113 if (len < 0) {
1114 return len;
1115 }
1116 i += len;
1117 pkt_dev->clone_skb = value;
1118
1119 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1120 return count;
1121 }
1122 if (!strcmp(name, "count")) {
1123 len = num_arg(&user_buffer[i], 10, &value);
1124 if (len < 0) {
1125 return len;
1126 }
1127 i += len;
1128 pkt_dev->count = value;
1129 sprintf(pg_result, "OK: count=%llu",
1130 (unsigned long long)pkt_dev->count);
1131 return count;
1132 }
1133 if (!strcmp(name, "src_mac_count")) {
1134 len = num_arg(&user_buffer[i], 10, &value);
1135 if (len < 0) {
1136 return len;
1137 }
1138 i += len;
1139 if (pkt_dev->src_mac_count != value) {
1140 pkt_dev->src_mac_count = value;
1141 pkt_dev->cur_src_mac_offset = 0;
1142 }
1143 sprintf(pg_result, "OK: src_mac_count=%d",
1144 pkt_dev->src_mac_count);
1145 return count;
1146 }
1147 if (!strcmp(name, "dst_mac_count")) {
1148 len = num_arg(&user_buffer[i], 10, &value);
1149 if (len < 0) {
1150 return len;
1151 }
1152 i += len;
1153 if (pkt_dev->dst_mac_count != value) {
1154 pkt_dev->dst_mac_count = value;
1155 pkt_dev->cur_dst_mac_offset = 0;
1156 }
1157 sprintf(pg_result, "OK: dst_mac_count=%d",
1158 pkt_dev->dst_mac_count);
1159 return count;
1160 }
1161 if (!strcmp(name, "flag")) {
1162 char f[32];
1163 memset(f, 0, 32);
1164 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1165 if (len < 0) {
1166 return len;
1167 }
1168 if (copy_from_user(f, &user_buffer[i], len))
1169 return -EFAULT;
1170 i += len;
1171 if (strcmp(f, "IPSRC_RND") == 0)
1172 pkt_dev->flags |= F_IPSRC_RND;
1173
1174 else if (strcmp(f, "!IPSRC_RND") == 0)
1175 pkt_dev->flags &= ~F_IPSRC_RND;
1176
1177 else if (strcmp(f, "TXSIZE_RND") == 0)
1178 pkt_dev->flags |= F_TXSIZE_RND;
1179
1180 else if (strcmp(f, "!TXSIZE_RND") == 0)
1181 pkt_dev->flags &= ~F_TXSIZE_RND;
1182
1183 else if (strcmp(f, "IPDST_RND") == 0)
1184 pkt_dev->flags |= F_IPDST_RND;
1185
1186 else if (strcmp(f, "!IPDST_RND") == 0)
1187 pkt_dev->flags &= ~F_IPDST_RND;
1188
1189 else if (strcmp(f, "UDPSRC_RND") == 0)
1190 pkt_dev->flags |= F_UDPSRC_RND;
1191
1192 else if (strcmp(f, "!UDPSRC_RND") == 0)
1193 pkt_dev->flags &= ~F_UDPSRC_RND;
1194
1195 else if (strcmp(f, "UDPDST_RND") == 0)
1196 pkt_dev->flags |= F_UDPDST_RND;
1197
1198 else if (strcmp(f, "!UDPDST_RND") == 0)
1199 pkt_dev->flags &= ~F_UDPDST_RND;
1200
1201 else if (strcmp(f, "MACSRC_RND") == 0)
1202 pkt_dev->flags |= F_MACSRC_RND;
1203
1204 else if (strcmp(f, "!MACSRC_RND") == 0)
1205 pkt_dev->flags &= ~F_MACSRC_RND;
1206
1207 else if (strcmp(f, "MACDST_RND") == 0)
1208 pkt_dev->flags |= F_MACDST_RND;
1209
1210 else if (strcmp(f, "!MACDST_RND") == 0)
1211 pkt_dev->flags &= ~F_MACDST_RND;
1212
1213 else if (strcmp(f, "MPLS_RND") == 0)
1214 pkt_dev->flags |= F_MPLS_RND;
1215
1216 else if (strcmp(f, "!MPLS_RND") == 0)
1217 pkt_dev->flags &= ~F_MPLS_RND;
1218
1219 else if (strcmp(f, "VID_RND") == 0)
1220 pkt_dev->flags |= F_VID_RND;
1221
1222 else if (strcmp(f, "!VID_RND") == 0)
1223 pkt_dev->flags &= ~F_VID_RND;
1224
1225 else if (strcmp(f, "SVID_RND") == 0)
1226 pkt_dev->flags |= F_SVID_RND;
1227
1228 else if (strcmp(f, "!SVID_RND") == 0)
1229 pkt_dev->flags &= ~F_SVID_RND;
1230
1231 else if (strcmp(f, "FLOW_SEQ") == 0)
1232 pkt_dev->flags |= F_FLOW_SEQ;
1233
1234 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1235 pkt_dev->flags |= F_QUEUE_MAP_RND;
1236
1237 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1238 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1239 #ifdef CONFIG_XFRM
1240 else if (strcmp(f, "IPSEC") == 0)
1241 pkt_dev->flags |= F_IPSEC_ON;
1242 #endif
1243
1244 else if (strcmp(f, "!IPV6") == 0)
1245 pkt_dev->flags &= ~F_IPV6;
1246
1247 else {
1248 sprintf(pg_result,
1249 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1250 f,
1251 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1252 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC\n");
1253 return count;
1254 }
1255 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1256 return count;
1257 }
1258 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1259 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1260 if (len < 0) {
1261 return len;
1262 }
1263
1264 if (copy_from_user(buf, &user_buffer[i], len))
1265 return -EFAULT;
1266 buf[len] = 0;
1267 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1268 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1269 strncpy(pkt_dev->dst_min, buf, len);
1270 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1271 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1272 }
1273 if (debug)
1274 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1275 pkt_dev->dst_min);
1276 i += len;
1277 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1278 return count;
1279 }
1280 if (!strcmp(name, "dst_max")) {
1281 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1282 if (len < 0) {
1283 return len;
1284 }
1285
1286 if (copy_from_user(buf, &user_buffer[i], len))
1287 return -EFAULT;
1288
1289 buf[len] = 0;
1290 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1291 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1292 strncpy(pkt_dev->dst_max, buf, len);
1293 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1294 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1295 }
1296 if (debug)
1297 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1298 pkt_dev->dst_max);
1299 i += len;
1300 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1301 return count;
1302 }
1303 if (!strcmp(name, "dst6")) {
1304 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1305 if (len < 0)
1306 return len;
1307
1308 pkt_dev->flags |= F_IPV6;
1309
1310 if (copy_from_user(buf, &user_buffer[i], len))
1311 return -EFAULT;
1312 buf[len] = 0;
1313
1314 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1315 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1316
1317 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1318
1319 if (debug)
1320 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1321
1322 i += len;
1323 sprintf(pg_result, "OK: dst6=%s", buf);
1324 return count;
1325 }
1326 if (!strcmp(name, "dst6_min")) {
1327 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1328 if (len < 0)
1329 return len;
1330
1331 pkt_dev->flags |= F_IPV6;
1332
1333 if (copy_from_user(buf, &user_buffer[i], len))
1334 return -EFAULT;
1335 buf[len] = 0;
1336
1337 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1338 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1339
1340 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1341 &pkt_dev->min_in6_daddr);
1342 if (debug)
1343 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1344
1345 i += len;
1346 sprintf(pg_result, "OK: dst6_min=%s", buf);
1347 return count;
1348 }
1349 if (!strcmp(name, "dst6_max")) {
1350 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1351 if (len < 0)
1352 return len;
1353
1354 pkt_dev->flags |= F_IPV6;
1355
1356 if (copy_from_user(buf, &user_buffer[i], len))
1357 return -EFAULT;
1358 buf[len] = 0;
1359
1360 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1361 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1362
1363 if (debug)
1364 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1365
1366 i += len;
1367 sprintf(pg_result, "OK: dst6_max=%s", buf);
1368 return count;
1369 }
1370 if (!strcmp(name, "src6")) {
1371 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1372 if (len < 0)
1373 return len;
1374
1375 pkt_dev->flags |= F_IPV6;
1376
1377 if (copy_from_user(buf, &user_buffer[i], len))
1378 return -EFAULT;
1379 buf[len] = 0;
1380
1381 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1382 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1383
1384 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1385
1386 if (debug)
1387 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1388
1389 i += len;
1390 sprintf(pg_result, "OK: src6=%s", buf);
1391 return count;
1392 }
1393 if (!strcmp(name, "src_min")) {
1394 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1395 if (len < 0) {
1396 return len;
1397 }
1398 if (copy_from_user(buf, &user_buffer[i], len))
1399 return -EFAULT;
1400 buf[len] = 0;
1401 if (strcmp(buf, pkt_dev->src_min) != 0) {
1402 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1403 strncpy(pkt_dev->src_min, buf, len);
1404 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1405 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1406 }
1407 if (debug)
1408 printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1409 pkt_dev->src_min);
1410 i += len;
1411 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1412 return count;
1413 }
1414 if (!strcmp(name, "src_max")) {
1415 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1416 if (len < 0) {
1417 return len;
1418 }
1419 if (copy_from_user(buf, &user_buffer[i], len))
1420 return -EFAULT;
1421 buf[len] = 0;
1422 if (strcmp(buf, pkt_dev->src_max) != 0) {
1423 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1424 strncpy(pkt_dev->src_max, buf, len);
1425 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1426 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1427 }
1428 if (debug)
1429 printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1430 pkt_dev->src_max);
1431 i += len;
1432 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1433 return count;
1434 }
1435 if (!strcmp(name, "dst_mac")) {
1436 char *v = valstr;
1437 unsigned char old_dmac[ETH_ALEN];
1438 unsigned char *m = pkt_dev->dst_mac;
1439 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1440
1441 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1442 if (len < 0) {
1443 return len;
1444 }
1445 memset(valstr, 0, sizeof(valstr));
1446 if (copy_from_user(valstr, &user_buffer[i], len))
1447 return -EFAULT;
1448 i += len;
1449
1450 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1451 if (*v >= '0' && *v <= '9') {
1452 *m *= 16;
1453 *m += *v - '0';
1454 }
1455 if (*v >= 'A' && *v <= 'F') {
1456 *m *= 16;
1457 *m += *v - 'A' + 10;
1458 }
1459 if (*v >= 'a' && *v <= 'f') {
1460 *m *= 16;
1461 *m += *v - 'a' + 10;
1462 }
1463 if (*v == ':') {
1464 m++;
1465 *m = 0;
1466 }
1467 }
1468
1469 /* Set up Dest MAC */
1470 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1471 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1472
1473 sprintf(pg_result, "OK: dstmac");
1474 return count;
1475 }
1476 if (!strcmp(name, "src_mac")) {
1477 char *v = valstr;
1478 unsigned char old_smac[ETH_ALEN];
1479 unsigned char *m = pkt_dev->src_mac;
1480
1481 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN);
1482
1483 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1484 if (len < 0) {
1485 return len;
1486 }
1487 memset(valstr, 0, sizeof(valstr));
1488 if (copy_from_user(valstr, &user_buffer[i], len))
1489 return -EFAULT;
1490 i += len;
1491
1492 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1493 if (*v >= '0' && *v <= '9') {
1494 *m *= 16;
1495 *m += *v - '0';
1496 }
1497 if (*v >= 'A' && *v <= 'F') {
1498 *m *= 16;
1499 *m += *v - 'A' + 10;
1500 }
1501 if (*v >= 'a' && *v <= 'f') {
1502 *m *= 16;
1503 *m += *v - 'a' + 10;
1504 }
1505 if (*v == ':') {
1506 m++;
1507 *m = 0;
1508 }
1509 }
1510
1511 /* Set up Src MAC */
1512 if (compare_ether_addr(old_smac, pkt_dev->src_mac))
1513 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN);
1514
1515 sprintf(pg_result, "OK: srcmac");
1516 return count;
1517 }
1518
1519 if (!strcmp(name, "clear_counters")) {
1520 pktgen_clear_counters(pkt_dev);
1521 sprintf(pg_result, "OK: Clearing counters.\n");
1522 return count;
1523 }
1524
1525 if (!strcmp(name, "flows")) {
1526 len = num_arg(&user_buffer[i], 10, &value);
1527 if (len < 0) {
1528 return len;
1529 }
1530 i += len;
1531 if (value > MAX_CFLOWS)
1532 value = MAX_CFLOWS;
1533
1534 pkt_dev->cflows = value;
1535 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1536 return count;
1537 }
1538
1539 if (!strcmp(name, "flowlen")) {
1540 len = num_arg(&user_buffer[i], 10, &value);
1541 if (len < 0) {
1542 return len;
1543 }
1544 i += len;
1545 pkt_dev->lflow = value;
1546 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1547 return count;
1548 }
1549
1550 if (!strcmp(name, "queue_map_min")) {
1551 len = num_arg(&user_buffer[i], 5, &value);
1552 if (len < 0) {
1553 return len;
1554 }
1555 i += len;
1556 pkt_dev->queue_map_min = value;
1557 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1558 return count;
1559 }
1560
1561 if (!strcmp(name, "queue_map_max")) {
1562 len = num_arg(&user_buffer[i], 5, &value);
1563 if (len < 0) {
1564 return len;
1565 }
1566 i += len;
1567 pkt_dev->queue_map_max = value;
1568 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1569 return count;
1570 }
1571
1572 if (!strcmp(name, "mpls")) {
1573 unsigned n, offset;
1574 len = get_labels(&user_buffer[i], pkt_dev);
1575 if (len < 0) { return len; }
1576 i += len;
1577 offset = sprintf(pg_result, "OK: mpls=");
1578 for (n = 0; n < pkt_dev->nr_labels; n++)
1579 offset += sprintf(pg_result + offset,
1580 "%08x%s", ntohl(pkt_dev->labels[n]),
1581 n == pkt_dev->nr_labels-1 ? "" : ",");
1582
1583 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1584 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1585 pkt_dev->svlan_id = 0xffff;
1586
1587 if (debug)
1588 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1589 }
1590 return count;
1591 }
1592
1593 if (!strcmp(name, "vlan_id")) {
1594 len = num_arg(&user_buffer[i], 4, &value);
1595 if (len < 0) {
1596 return len;
1597 }
1598 i += len;
1599 if (value <= 4095) {
1600 pkt_dev->vlan_id = value; /* turn on VLAN */
1601
1602 if (debug)
1603 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1604
1605 if (debug && pkt_dev->nr_labels)
1606 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1607
1608 pkt_dev->nr_labels = 0; /* turn off MPLS */
1609 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1610 } else {
1611 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1612 pkt_dev->svlan_id = 0xffff;
1613
1614 if (debug)
1615 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1616 }
1617 return count;
1618 }
1619
1620 if (!strcmp(name, "vlan_p")) {
1621 len = num_arg(&user_buffer[i], 1, &value);
1622 if (len < 0) {
1623 return len;
1624 }
1625 i += len;
1626 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1627 pkt_dev->vlan_p = value;
1628 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1629 } else {
1630 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1631 }
1632 return count;
1633 }
1634
1635 if (!strcmp(name, "vlan_cfi")) {
1636 len = num_arg(&user_buffer[i], 1, &value);
1637 if (len < 0) {
1638 return len;
1639 }
1640 i += len;
1641 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1642 pkt_dev->vlan_cfi = value;
1643 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1644 } else {
1645 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1646 }
1647 return count;
1648 }
1649
1650 if (!strcmp(name, "svlan_id")) {
1651 len = num_arg(&user_buffer[i], 4, &value);
1652 if (len < 0) {
1653 return len;
1654 }
1655 i += len;
1656 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1657 pkt_dev->svlan_id = value; /* turn on SVLAN */
1658
1659 if (debug)
1660 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1661
1662 if (debug && pkt_dev->nr_labels)
1663 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1664
1665 pkt_dev->nr_labels = 0; /* turn off MPLS */
1666 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1667 } else {
1668 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1669 pkt_dev->svlan_id = 0xffff;
1670
1671 if (debug)
1672 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1673 }
1674 return count;
1675 }
1676
1677 if (!strcmp(name, "svlan_p")) {
1678 len = num_arg(&user_buffer[i], 1, &value);
1679 if (len < 0) {
1680 return len;
1681 }
1682 i += len;
1683 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1684 pkt_dev->svlan_p = value;
1685 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1686 } else {
1687 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1688 }
1689 return count;
1690 }
1691
1692 if (!strcmp(name, "svlan_cfi")) {
1693 len = num_arg(&user_buffer[i], 1, &value);
1694 if (len < 0) {
1695 return len;
1696 }
1697 i += len;
1698 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1699 pkt_dev->svlan_cfi = value;
1700 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1701 } else {
1702 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1703 }
1704 return count;
1705 }
1706
1707 if (!strcmp(name, "tos")) {
1708 __u32 tmp_value = 0;
1709 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1710 if (len < 0) {
1711 return len;
1712 }
1713 i += len;
1714 if (len == 2) {
1715 pkt_dev->tos = tmp_value;
1716 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1717 } else {
1718 sprintf(pg_result, "ERROR: tos must be 00-ff");
1719 }
1720 return count;
1721 }
1722
1723 if (!strcmp(name, "traffic_class")) {
1724 __u32 tmp_value = 0;
1725 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1726 if (len < 0) {
1727 return len;
1728 }
1729 i += len;
1730 if (len == 2) {
1731 pkt_dev->traffic_class = tmp_value;
1732 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1733 } else {
1734 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1735 }
1736 return count;
1737 }
1738
1739 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1740 return -EINVAL;
1741 }
1742
1743 static int pktgen_if_open(struct inode *inode, struct file *file)
1744 {
1745 return single_open(file, pktgen_if_show, PDE(inode)->data);
1746 }
1747
1748 static const struct file_operations pktgen_if_fops = {
1749 .owner = THIS_MODULE,
1750 .open = pktgen_if_open,
1751 .read = seq_read,
1752 .llseek = seq_lseek,
1753 .write = pktgen_if_write,
1754 .release = single_release,
1755 };
1756
1757 static int pktgen_thread_show(struct seq_file *seq, void *v)
1758 {
1759 struct pktgen_thread *t = seq->private;
1760 struct pktgen_dev *pkt_dev;
1761
1762 BUG_ON(!t);
1763
1764 seq_printf(seq, "Running: ");
1765
1766 if_lock(t);
1767 list_for_each_entry(pkt_dev, &t->if_list, list)
1768 if (pkt_dev->running)
1769 seq_printf(seq, "%s ", pkt_dev->odev->name);
1770
1771 seq_printf(seq, "\nStopped: ");
1772
1773 list_for_each_entry(pkt_dev, &t->if_list, list)
1774 if (!pkt_dev->running)
1775 seq_printf(seq, "%s ", pkt_dev->odev->name);
1776
1777 if (t->result[0])
1778 seq_printf(seq, "\nResult: %s\n", t->result);
1779 else
1780 seq_printf(seq, "\nResult: NA\n");
1781
1782 if_unlock(t);
1783
1784 return 0;
1785 }
1786
1787 static ssize_t pktgen_thread_write(struct file *file,
1788 const char __user * user_buffer,
1789 size_t count, loff_t * offset)
1790 {
1791 struct seq_file *seq = (struct seq_file *)file->private_data;
1792 struct pktgen_thread *t = seq->private;
1793 int i = 0, max, len, ret;
1794 char name[40];
1795 char *pg_result;
1796
1797 if (count < 1) {
1798 // sprintf(pg_result, "Wrong command format");
1799 return -EINVAL;
1800 }
1801
1802 max = count - i;
1803 len = count_trail_chars(&user_buffer[i], max);
1804 if (len < 0)
1805 return len;
1806
1807 i += len;
1808
1809 /* Read variable name */
1810
1811 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1812 if (len < 0)
1813 return len;
1814
1815 memset(name, 0, sizeof(name));
1816 if (copy_from_user(name, &user_buffer[i], len))
1817 return -EFAULT;
1818 i += len;
1819
1820 max = count - i;
1821 len = count_trail_chars(&user_buffer[i], max);
1822 if (len < 0)
1823 return len;
1824
1825 i += len;
1826
1827 if (debug)
1828 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1829 name, (unsigned long)count);
1830
1831 if (!t) {
1832 printk(KERN_ERR "pktgen: ERROR: No thread\n");
1833 ret = -EINVAL;
1834 goto out;
1835 }
1836
1837 pg_result = &(t->result[0]);
1838
1839 if (!strcmp(name, "add_device")) {
1840 char f[32];
1841 memset(f, 0, 32);
1842 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1843 if (len < 0) {
1844 ret = len;
1845 goto out;
1846 }
1847 if (copy_from_user(f, &user_buffer[i], len))
1848 return -EFAULT;
1849 i += len;
1850 mutex_lock(&pktgen_thread_lock);
1851 pktgen_add_device(t, f);
1852 mutex_unlock(&pktgen_thread_lock);
1853 ret = count;
1854 sprintf(pg_result, "OK: add_device=%s", f);
1855 goto out;
1856 }
1857
1858 if (!strcmp(name, "rem_device_all")) {
1859 mutex_lock(&pktgen_thread_lock);
1860 t->control |= T_REMDEVALL;
1861 mutex_unlock(&pktgen_thread_lock);
1862 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1863 ret = count;
1864 sprintf(pg_result, "OK: rem_device_all");
1865 goto out;
1866 }
1867
1868 if (!strcmp(name, "max_before_softirq")) {
1869 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1870 ret = count;
1871 goto out;
1872 }
1873
1874 ret = -EINVAL;
1875 out:
1876 return ret;
1877 }
1878
1879 static int pktgen_thread_open(struct inode *inode, struct file *file)
1880 {
1881 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1882 }
1883
1884 static const struct file_operations pktgen_thread_fops = {
1885 .owner = THIS_MODULE,
1886 .open = pktgen_thread_open,
1887 .read = seq_read,
1888 .llseek = seq_lseek,
1889 .write = pktgen_thread_write,
1890 .release = single_release,
1891 };
1892
1893 /* Think find or remove for NN */
1894 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1895 {
1896 struct pktgen_thread *t;
1897 struct pktgen_dev *pkt_dev = NULL;
1898
1899 list_for_each_entry(t, &pktgen_threads, th_list) {
1900 pkt_dev = pktgen_find_dev(t, ifname);
1901 if (pkt_dev) {
1902 if (remove) {
1903 if_lock(t);
1904 pkt_dev->removal_mark = 1;
1905 t->control |= T_REMDEV;
1906 if_unlock(t);
1907 }
1908 break;
1909 }
1910 }
1911 return pkt_dev;
1912 }
1913
1914 /*
1915 * mark a device for removal
1916 */
1917 static void pktgen_mark_device(const char *ifname)
1918 {
1919 struct pktgen_dev *pkt_dev = NULL;
1920 const int max_tries = 10, msec_per_try = 125;
1921 int i = 0;
1922
1923 mutex_lock(&pktgen_thread_lock);
1924 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname);
1925
1926 while (1) {
1927
1928 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1929 if (pkt_dev == NULL)
1930 break; /* success */
1931
1932 mutex_unlock(&pktgen_thread_lock);
1933 pr_debug("pktgen: pktgen_mark_device waiting for %s "
1934 "to disappear....\n", ifname);
1935 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1936 mutex_lock(&pktgen_thread_lock);
1937
1938 if (++i >= max_tries) {
1939 printk(KERN_ERR "pktgen_mark_device: timed out after "
1940 "waiting %d msec for device %s to be removed\n",
1941 msec_per_try * i, ifname);
1942 break;
1943 }
1944
1945 }
1946
1947 mutex_unlock(&pktgen_thread_lock);
1948 }
1949
1950 static void pktgen_change_name(struct net_device *dev)
1951 {
1952 struct pktgen_thread *t;
1953
1954 list_for_each_entry(t, &pktgen_threads, th_list) {
1955 struct pktgen_dev *pkt_dev;
1956
1957 list_for_each_entry(pkt_dev, &t->if_list, list) {
1958 if (pkt_dev->odev != dev)
1959 continue;
1960
1961 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1962
1963 pkt_dev->entry = create_proc_entry(dev->name, 0600,
1964 pg_proc_dir);
1965 if (!pkt_dev->entry)
1966 printk(KERN_ERR "pktgen: can't move proc "
1967 " entry for '%s'\n", dev->name);
1968 break;
1969 }
1970 }
1971 }
1972
1973 static int pktgen_device_event(struct notifier_block *unused,
1974 unsigned long event, void *ptr)
1975 {
1976 struct net_device *dev = ptr;
1977
1978 if (dev->nd_net != &init_net)
1979 return NOTIFY_DONE;
1980
1981 /* It is OK that we do not hold the group lock right now,
1982 * as we run under the RTNL lock.
1983 */
1984
1985 switch (event) {
1986 case NETDEV_CHANGENAME:
1987 pktgen_change_name(dev);
1988 break;
1989
1990 case NETDEV_UNREGISTER:
1991 pktgen_mark_device(dev->name);
1992 break;
1993 }
1994
1995 return NOTIFY_DONE;
1996 }
1997
1998 /* Associate pktgen_dev with a device. */
1999
2000 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
2001 {
2002 struct net_device *odev;
2003 int err;
2004
2005 /* Clean old setups */
2006 if (pkt_dev->odev) {
2007 dev_put(pkt_dev->odev);
2008 pkt_dev->odev = NULL;
2009 }
2010
2011 odev = dev_get_by_name(&init_net, ifname);
2012 if (!odev) {
2013 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname);
2014 return -ENODEV;
2015 }
2016
2017 if (odev->type != ARPHRD_ETHER) {
2018 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname);
2019 err = -EINVAL;
2020 } else if (!netif_running(odev)) {
2021 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname);
2022 err = -ENETDOWN;
2023 } else {
2024 pkt_dev->odev = odev;
2025 return 0;
2026 }
2027
2028 dev_put(odev);
2029 return err;
2030 }
2031
2032 /* Read pkt_dev from the interface and set up internal pktgen_dev
2033 * structure to have the right information to create/send packets
2034 */
2035 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2036 {
2037 if (!pkt_dev->odev) {
2038 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in "
2039 "setup_inject.\n");
2040 sprintf(pkt_dev->result,
2041 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2042 return;
2043 }
2044
2045 /* Default to the interface's mac if not explicitly set. */
2046
2047 if (is_zero_ether_addr(pkt_dev->src_mac))
2048 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2049
2050 /* Set up Dest MAC */
2051 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2052
2053 /* Set up pkt size */
2054 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2055
2056 if (pkt_dev->flags & F_IPV6) {
2057 /*
2058 * Skip this automatic address setting until locks or functions
2059 * gets exported
2060 */
2061
2062 #ifdef NOTNOW
2063 int i, set = 0, err = 1;
2064 struct inet6_dev *idev;
2065
2066 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2067 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2068 set = 1;
2069 break;
2070 }
2071
2072 if (!set) {
2073
2074 /*
2075 * Use linklevel address if unconfigured.
2076 *
2077 * use ipv6_get_lladdr if/when it's get exported
2078 */
2079
2080 rcu_read_lock();
2081 if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) {
2082 struct inet6_ifaddr *ifp;
2083
2084 read_lock_bh(&idev->lock);
2085 for (ifp = idev->addr_list; ifp;
2086 ifp = ifp->if_next) {
2087 if (ifp->scope == IFA_LINK
2088 && !(ifp->
2089 flags & IFA_F_TENTATIVE)) {
2090 ipv6_addr_copy(&pkt_dev->
2091 cur_in6_saddr,
2092 &ifp->addr);
2093 err = 0;
2094 break;
2095 }
2096 }
2097 read_unlock_bh(&idev->lock);
2098 }
2099 rcu_read_unlock();
2100 if (err)
2101 printk(KERN_ERR "pktgen: ERROR: IPv6 link "
2102 "address not availble.\n");
2103 }
2104 #endif
2105 } else {
2106 pkt_dev->saddr_min = 0;
2107 pkt_dev->saddr_max = 0;
2108 if (strlen(pkt_dev->src_min) == 0) {
2109
2110 struct in_device *in_dev;
2111
2112 rcu_read_lock();
2113 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2114 if (in_dev) {
2115 if (in_dev->ifa_list) {
2116 pkt_dev->saddr_min =
2117 in_dev->ifa_list->ifa_address;
2118 pkt_dev->saddr_max = pkt_dev->saddr_min;
2119 }
2120 }
2121 rcu_read_unlock();
2122 } else {
2123 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2124 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2125 }
2126
2127 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2128 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2129 }
2130 /* Initialize current values. */
2131 pkt_dev->cur_dst_mac_offset = 0;
2132 pkt_dev->cur_src_mac_offset = 0;
2133 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2134 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2135 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2136 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2137 pkt_dev->nflows = 0;
2138 }
2139
2140 static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us)
2141 {
2142 __u64 start;
2143 __u64 now;
2144
2145 start = now = getCurUs();
2146 printk(KERN_INFO "sleeping for %d\n", (int)(spin_until_us - now));
2147 while (now < spin_until_us) {
2148 /* TODO: optimize sleeping behavior */
2149 if (spin_until_us - now > jiffies_to_usecs(1) + 1)
2150 schedule_timeout_interruptible(1);
2151 else if (spin_until_us - now > 100) {
2152 if (!pkt_dev->running)
2153 return;
2154 if (need_resched())
2155 schedule();
2156 }
2157
2158 now = getCurUs();
2159 }
2160
2161 pkt_dev->idle_acc += now - start;
2162 }
2163
2164 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2165 {
2166 pkt_dev->pkt_overhead = 0;
2167 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2168 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2169 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2170 }
2171
2172 static inline int f_seen(struct pktgen_dev *pkt_dev, int flow)
2173 {
2174
2175 if (pkt_dev->flows[flow].flags & F_INIT)
2176 return 1;
2177 else
2178 return 0;
2179 }
2180
2181 static inline int f_pick(struct pktgen_dev *pkt_dev)
2182 {
2183 int flow = pkt_dev->curfl;
2184
2185 if (pkt_dev->flags & F_FLOW_SEQ) {
2186 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2187 /* reset time */
2188 pkt_dev->flows[flow].count = 0;
2189 pkt_dev->curfl += 1;
2190 if (pkt_dev->curfl >= pkt_dev->cflows)
2191 pkt_dev->curfl = 0; /*reset */
2192 }
2193 } else {
2194 flow = random32() % pkt_dev->cflows;
2195
2196 if (pkt_dev->flows[flow].count > pkt_dev->lflow)
2197 pkt_dev->flows[flow].count = 0;
2198 }
2199
2200 return pkt_dev->curfl;
2201 }
2202
2203
2204 #ifdef CONFIG_XFRM
2205 /* If there was already an IPSEC SA, we keep it as is, else
2206 * we go look for it ...
2207 */
2208 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2209 {
2210 struct xfrm_state *x = pkt_dev->flows[flow].x;
2211 if (!x) {
2212 /*slow path: we dont already have xfrm_state*/
2213 x = xfrm_stateonly_find((xfrm_address_t *)&pkt_dev->cur_daddr,
2214 (xfrm_address_t *)&pkt_dev->cur_saddr,
2215 AF_INET,
2216 pkt_dev->ipsmode,
2217 pkt_dev->ipsproto, 0);
2218 if (x) {
2219 pkt_dev->flows[flow].x = x;
2220 set_pkt_overhead(pkt_dev);
2221 pkt_dev->pkt_overhead+=x->props.header_len;
2222 }
2223
2224 }
2225 }
2226 #endif
2227 /* Increment/randomize headers according to flags and current values
2228 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2229 */
2230 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2231 {
2232 __u32 imn;
2233 __u32 imx;
2234 int flow = 0;
2235
2236 if (pkt_dev->cflows)
2237 flow = f_pick(pkt_dev);
2238
2239 /* Deal with source MAC */
2240 if (pkt_dev->src_mac_count > 1) {
2241 __u32 mc;
2242 __u32 tmp;
2243
2244 if (pkt_dev->flags & F_MACSRC_RND)
2245 mc = random32() % pkt_dev->src_mac_count;
2246 else {
2247 mc = pkt_dev->cur_src_mac_offset++;
2248 if (pkt_dev->cur_src_mac_offset >
2249 pkt_dev->src_mac_count)
2250 pkt_dev->cur_src_mac_offset = 0;
2251 }
2252
2253 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2254 pkt_dev->hh[11] = tmp;
2255 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2256 pkt_dev->hh[10] = tmp;
2257 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2258 pkt_dev->hh[9] = tmp;
2259 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2260 pkt_dev->hh[8] = tmp;
2261 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2262 pkt_dev->hh[7] = tmp;
2263 }
2264
2265 /* Deal with Destination MAC */
2266 if (pkt_dev->dst_mac_count > 1) {
2267 __u32 mc;
2268 __u32 tmp;
2269
2270 if (pkt_dev->flags & F_MACDST_RND)
2271 mc = random32() % pkt_dev->dst_mac_count;
2272
2273 else {
2274 mc = pkt_dev->cur_dst_mac_offset++;
2275 if (pkt_dev->cur_dst_mac_offset >
2276 pkt_dev->dst_mac_count) {
2277 pkt_dev->cur_dst_mac_offset = 0;
2278 }
2279 }
2280
2281 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2282 pkt_dev->hh[5] = tmp;
2283 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2284 pkt_dev->hh[4] = tmp;
2285 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2286 pkt_dev->hh[3] = tmp;
2287 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2288 pkt_dev->hh[2] = tmp;
2289 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2290 pkt_dev->hh[1] = tmp;
2291 }
2292
2293 if (pkt_dev->flags & F_MPLS_RND) {
2294 unsigned i;
2295 for (i = 0; i < pkt_dev->nr_labels; i++)
2296 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2297 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2298 ((__force __be32)random32() &
2299 htonl(0x000fffff));
2300 }
2301
2302 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2303 pkt_dev->vlan_id = random32() & (4096-1);
2304 }
2305
2306 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2307 pkt_dev->svlan_id = random32() & (4096 - 1);
2308 }
2309
2310 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2311 if (pkt_dev->flags & F_UDPSRC_RND)
2312 pkt_dev->cur_udp_src = random32() %
2313 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2314 + pkt_dev->udp_src_min;
2315
2316 else {
2317 pkt_dev->cur_udp_src++;
2318 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2319 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2320 }
2321 }
2322
2323 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2324 if (pkt_dev->flags & F_UDPDST_RND) {
2325 pkt_dev->cur_udp_dst = random32() %
2326 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2327 + pkt_dev->udp_dst_min;
2328 } else {
2329 pkt_dev->cur_udp_dst++;
2330 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2331 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2332 }
2333 }
2334
2335 if (!(pkt_dev->flags & F_IPV6)) {
2336
2337 if ((imn = ntohl(pkt_dev->saddr_min)) < (imx =
2338 ntohl(pkt_dev->
2339 saddr_max))) {
2340 __u32 t;
2341 if (pkt_dev->flags & F_IPSRC_RND)
2342 t = random32() % (imx - imn) + imn;
2343 else {
2344 t = ntohl(pkt_dev->cur_saddr);
2345 t++;
2346 if (t > imx) {
2347 t = imn;
2348 }
2349 }
2350 pkt_dev->cur_saddr = htonl(t);
2351 }
2352
2353 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2354 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2355 } else {
2356 imn = ntohl(pkt_dev->daddr_min);
2357 imx = ntohl(pkt_dev->daddr_max);
2358 if (imn < imx) {
2359 __u32 t;
2360 __be32 s;
2361 if (pkt_dev->flags & F_IPDST_RND) {
2362
2363 t = random32() % (imx - imn) + imn;
2364 s = htonl(t);
2365
2366 while (LOOPBACK(s) || MULTICAST(s)
2367 || BADCLASS(s) || ZERONET(s)
2368 || LOCAL_MCAST(s)) {
2369 t = random32() % (imx - imn) + imn;
2370 s = htonl(t);
2371 }
2372 pkt_dev->cur_daddr = s;
2373 } else {
2374 t = ntohl(pkt_dev->cur_daddr);
2375 t++;
2376 if (t > imx) {
2377 t = imn;
2378 }
2379 pkt_dev->cur_daddr = htonl(t);
2380 }
2381 }
2382 if (pkt_dev->cflows) {
2383 pkt_dev->flows[flow].flags |= F_INIT;
2384 pkt_dev->flows[flow].cur_daddr =
2385 pkt_dev->cur_daddr;
2386 #ifdef CONFIG_XFRM
2387 if (pkt_dev->flags & F_IPSEC_ON)
2388 get_ipsec_sa(pkt_dev, flow);
2389 #endif
2390 pkt_dev->nflows++;
2391 }
2392 }
2393 } else { /* IPV6 * */
2394
2395 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2396 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2397 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2398 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2399 else {
2400 int i;
2401
2402 /* Only random destinations yet */
2403
2404 for (i = 0; i < 4; i++) {
2405 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2406 (((__force __be32)random32() |
2407 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2408 pkt_dev->max_in6_daddr.s6_addr32[i]);
2409 }
2410 }
2411 }
2412
2413 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2414 __u32 t;
2415 if (pkt_dev->flags & F_TXSIZE_RND) {
2416 t = random32() %
2417 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2418 + pkt_dev->min_pkt_size;
2419 } else {
2420 t = pkt_dev->cur_pkt_size + 1;
2421 if (t > pkt_dev->max_pkt_size)
2422 t = pkt_dev->min_pkt_size;
2423 }
2424 pkt_dev->cur_pkt_size = t;
2425 }
2426
2427 if (pkt_dev->queue_map_min < pkt_dev->queue_map_max) {
2428 __u16 t;
2429 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2430 t = random32() %
2431 (pkt_dev->queue_map_max - pkt_dev->queue_map_min + 1)
2432 + pkt_dev->queue_map_min;
2433 } else {
2434 t = pkt_dev->cur_queue_map + 1;
2435 if (t > pkt_dev->queue_map_max)
2436 t = pkt_dev->queue_map_min;
2437 }
2438 pkt_dev->cur_queue_map = t;
2439 }
2440
2441 pkt_dev->flows[flow].count++;
2442 }
2443
2444
2445 #ifdef CONFIG_XFRM
2446 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2447 {
2448 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2449 int err = 0;
2450 struct iphdr *iph;
2451
2452 if (!x)
2453 return 0;
2454 /* XXX: we dont support tunnel mode for now until
2455 * we resolve the dst issue */
2456 if (x->props.mode != XFRM_MODE_TRANSPORT)
2457 return 0;
2458
2459 spin_lock(&x->lock);
2460 iph = ip_hdr(skb);
2461
2462 err = x->mode->output(x, skb);
2463 if (err)
2464 goto error;
2465 err = x->type->output(x, skb);
2466 if (err)
2467 goto error;
2468
2469 x->curlft.bytes +=skb->len;
2470 x->curlft.packets++;
2471 spin_unlock(&x->lock);
2472
2473 error:
2474 spin_unlock(&x->lock);
2475 return err;
2476 }
2477
2478 static inline void free_SAs(struct pktgen_dev *pkt_dev)
2479 {
2480 if (pkt_dev->cflows) {
2481 /* let go of the SAs if we have them */
2482 int i = 0;
2483 for (; i < pkt_dev->nflows; i++){
2484 struct xfrm_state *x = pkt_dev->flows[i].x;
2485 if (x) {
2486 xfrm_state_put(x);
2487 pkt_dev->flows[i].x = NULL;
2488 }
2489 }
2490 }
2491 }
2492
2493 static inline int process_ipsec(struct pktgen_dev *pkt_dev,
2494 struct sk_buff *skb, __be16 protocol)
2495 {
2496 if (pkt_dev->flags & F_IPSEC_ON) {
2497 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2498 int nhead = 0;
2499 if (x) {
2500 int ret;
2501 __u8 *eth;
2502 nhead = x->props.header_len - skb_headroom(skb);
2503 if (nhead >0) {
2504 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2505 if (ret < 0) {
2506 printk(KERN_ERR "Error expanding "
2507 "ipsec packet %d\n",ret);
2508 return 0;
2509 }
2510 }
2511
2512 /* ipsec is not expecting ll header */
2513 skb_pull(skb, ETH_HLEN);
2514 ret = pktgen_output_ipsec(skb, pkt_dev);
2515 if (ret) {
2516 printk(KERN_ERR "Error creating ipsec "
2517 "packet %d\n",ret);
2518 kfree_skb(skb);
2519 return 0;
2520 }
2521 /* restore ll */
2522 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2523 memcpy(eth, pkt_dev->hh, 12);
2524 *(u16 *) & eth[12] = protocol;
2525 }
2526 }
2527 return 1;
2528 }
2529 #endif
2530
2531 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2532 {
2533 unsigned i;
2534 for (i = 0; i < pkt_dev->nr_labels; i++) {
2535 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2536 }
2537 mpls--;
2538 *mpls |= MPLS_STACK_BOTTOM;
2539 }
2540
2541 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2542 unsigned int prio)
2543 {
2544 return htons(id | (cfi << 12) | (prio << 13));
2545 }
2546
2547 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2548 struct pktgen_dev *pkt_dev)
2549 {
2550 struct sk_buff *skb = NULL;
2551 __u8 *eth;
2552 struct udphdr *udph;
2553 int datalen, iplen;
2554 struct iphdr *iph;
2555 struct pktgen_hdr *pgh = NULL;
2556 __be16 protocol = htons(ETH_P_IP);
2557 __be32 *mpls;
2558 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2559 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2560 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2561 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2562
2563
2564 if (pkt_dev->nr_labels)
2565 protocol = htons(ETH_P_MPLS_UC);
2566
2567 if (pkt_dev->vlan_id != 0xffff)
2568 protocol = htons(ETH_P_8021Q);
2569
2570 /* Update any of the values, used when we're incrementing various
2571 * fields.
2572 */
2573 mod_cur_headers(pkt_dev);
2574
2575 datalen = (odev->hard_header_len + 16) & ~0xf;
2576 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + datalen +
2577 pkt_dev->pkt_overhead, GFP_ATOMIC);
2578 if (!skb) {
2579 sprintf(pkt_dev->result, "No memory");
2580 return NULL;
2581 }
2582
2583 skb_reserve(skb, datalen);
2584
2585 /* Reserve for ethernet and IP header */
2586 eth = (__u8 *) skb_push(skb, 14);
2587 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2588 if (pkt_dev->nr_labels)
2589 mpls_push(mpls, pkt_dev);
2590
2591 if (pkt_dev->vlan_id != 0xffff) {
2592 if (pkt_dev->svlan_id != 0xffff) {
2593 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2594 *svlan_tci = build_tci(pkt_dev->svlan_id,
2595 pkt_dev->svlan_cfi,
2596 pkt_dev->svlan_p);
2597 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2598 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2599 }
2600 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2601 *vlan_tci = build_tci(pkt_dev->vlan_id,
2602 pkt_dev->vlan_cfi,
2603 pkt_dev->vlan_p);
2604 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2605 *vlan_encapsulated_proto = htons(ETH_P_IP);
2606 }
2607
2608 skb->network_header = skb->tail;
2609 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2610 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2611 skb->queue_mapping = pkt_dev->cur_queue_map;
2612
2613 iph = ip_hdr(skb);
2614 udph = udp_hdr(skb);
2615
2616 memcpy(eth, pkt_dev->hh, 12);
2617 *(__be16 *) & eth[12] = protocol;
2618
2619 /* Eth + IPh + UDPh + mpls */
2620 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2621 pkt_dev->pkt_overhead;
2622 if (datalen < sizeof(struct pktgen_hdr))
2623 datalen = sizeof(struct pktgen_hdr);
2624
2625 udph->source = htons(pkt_dev->cur_udp_src);
2626 udph->dest = htons(pkt_dev->cur_udp_dst);
2627 udph->len = htons(datalen + 8); /* DATA + udphdr */
2628 udph->check = 0; /* No checksum */
2629
2630 iph->ihl = 5;
2631 iph->version = 4;
2632 iph->ttl = 32;
2633 iph->tos = pkt_dev->tos;
2634 iph->protocol = IPPROTO_UDP; /* UDP */
2635 iph->saddr = pkt_dev->cur_saddr;
2636 iph->daddr = pkt_dev->cur_daddr;
2637 iph->frag_off = 0;
2638 iplen = 20 + 8 + datalen;
2639 iph->tot_len = htons(iplen);
2640 iph->check = 0;
2641 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2642 skb->protocol = protocol;
2643 skb->mac_header = (skb->network_header - ETH_HLEN -
2644 pkt_dev->pkt_overhead);
2645 skb->dev = odev;
2646 skb->pkt_type = PACKET_HOST;
2647
2648 if (pkt_dev->nfrags <= 0)
2649 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2650 else {
2651 int frags = pkt_dev->nfrags;
2652 int i;
2653
2654 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2655
2656 if (frags > MAX_SKB_FRAGS)
2657 frags = MAX_SKB_FRAGS;
2658 if (datalen > frags * PAGE_SIZE) {
2659 skb_put(skb, datalen - frags * PAGE_SIZE);
2660 datalen = frags * PAGE_SIZE;
2661 }
2662
2663 i = 0;
2664 while (datalen > 0) {
2665 struct page *page = alloc_pages(GFP_KERNEL, 0);
2666 skb_shinfo(skb)->frags[i].page = page;
2667 skb_shinfo(skb)->frags[i].page_offset = 0;
2668 skb_shinfo(skb)->frags[i].size =
2669 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2670 datalen -= skb_shinfo(skb)->frags[i].size;
2671 skb->len += skb_shinfo(skb)->frags[i].size;
2672 skb->data_len += skb_shinfo(skb)->frags[i].size;
2673 i++;
2674 skb_shinfo(skb)->nr_frags = i;
2675 }
2676
2677 while (i < frags) {
2678 int rem;
2679
2680 if (i == 0)
2681 break;
2682
2683 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2684 if (rem == 0)
2685 break;
2686
2687 skb_shinfo(skb)->frags[i - 1].size -= rem;
2688
2689 skb_shinfo(skb)->frags[i] =
2690 skb_shinfo(skb)->frags[i - 1];
2691 get_page(skb_shinfo(skb)->frags[i].page);
2692 skb_shinfo(skb)->frags[i].page =
2693 skb_shinfo(skb)->frags[i - 1].page;
2694 skb_shinfo(skb)->frags[i].page_offset +=
2695 skb_shinfo(skb)->frags[i - 1].size;
2696 skb_shinfo(skb)->frags[i].size = rem;
2697 i++;
2698 skb_shinfo(skb)->nr_frags = i;
2699 }
2700 }
2701
2702 /* Stamp the time, and sequence number, convert them to network byte order */
2703
2704 if (pgh) {
2705 struct timeval timestamp;
2706
2707 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2708 pgh->seq_num = htonl(pkt_dev->seq_num);
2709
2710 do_gettimeofday(&timestamp);
2711 pgh->tv_sec = htonl(timestamp.tv_sec);
2712 pgh->tv_usec = htonl(timestamp.tv_usec);
2713 }
2714
2715 #ifdef CONFIG_XFRM
2716 if (!process_ipsec(pkt_dev, skb, protocol))
2717 return NULL;
2718 #endif
2719
2720 return skb;
2721 }
2722
2723 /*
2724 * scan_ip6, fmt_ip taken from dietlibc-0.21
2725 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2726 *
2727 * Slightly modified for kernel.
2728 * Should be candidate for net/ipv4/utils.c
2729 * --ro
2730 */
2731
2732 static unsigned int scan_ip6(const char *s, char ip[16])
2733 {
2734 unsigned int i;
2735 unsigned int len = 0;
2736 unsigned long u;
2737 char suffix[16];
2738 unsigned int prefixlen = 0;
2739 unsigned int suffixlen = 0;
2740 __be32 tmp;
2741
2742 for (i = 0; i < 16; i++)
2743 ip[i] = 0;
2744
2745 for (;;) {
2746 if (*s == ':') {
2747 len++;
2748 if (s[1] == ':') { /* Found "::", skip to part 2 */
2749 s += 2;
2750 len++;
2751 break;
2752 }
2753 s++;
2754 }
2755 {
2756 char *tmp;
2757 u = simple_strtoul(s, &tmp, 16);
2758 i = tmp - s;
2759 }
2760
2761 if (!i)
2762 return 0;
2763 if (prefixlen == 12 && s[i] == '.') {
2764
2765 /* the last 4 bytes may be written as IPv4 address */
2766
2767 tmp = in_aton(s);
2768 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2769 return i + len;
2770 }
2771 ip[prefixlen++] = (u >> 8);
2772 ip[prefixlen++] = (u & 255);
2773 s += i;
2774 len += i;
2775 if (prefixlen == 16)
2776 return len;
2777 }
2778
2779 /* part 2, after "::" */
2780 for (;;) {
2781 if (*s == ':') {
2782 if (suffixlen == 0)
2783 break;
2784 s++;
2785 len++;
2786 } else if (suffixlen != 0)
2787 break;
2788 {
2789 char *tmp;
2790 u = simple_strtol(s, &tmp, 16);
2791 i = tmp - s;
2792 }
2793 if (!i) {
2794 if (*s)
2795 len--;
2796 break;
2797 }
2798 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2799 tmp = in_aton(s);
2800 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2801 sizeof(tmp));
2802 suffixlen += 4;
2803 len += strlen(s);
2804 break;
2805 }
2806 suffix[suffixlen++] = (u >> 8);
2807 suffix[suffixlen++] = (u & 255);
2808 s += i;
2809 len += i;
2810 if (prefixlen + suffixlen == 16)
2811 break;
2812 }
2813 for (i = 0; i < suffixlen; i++)
2814 ip[16 - suffixlen + i] = suffix[i];
2815 return len;
2816 }
2817
2818 static char tohex(char hexdigit)
2819 {
2820 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2821 }
2822
2823 static int fmt_xlong(char *s, unsigned int i)
2824 {
2825 char *bak = s;
2826 *s = tohex((i >> 12) & 0xf);
2827 if (s != bak || *s != '0')
2828 ++s;
2829 *s = tohex((i >> 8) & 0xf);
2830 if (s != bak || *s != '0')
2831 ++s;
2832 *s = tohex((i >> 4) & 0xf);
2833 if (s != bak || *s != '0')
2834 ++s;
2835 *s = tohex(i & 0xf);
2836 return s - bak + 1;
2837 }
2838
2839 static unsigned int fmt_ip6(char *s, const char ip[16])
2840 {
2841 unsigned int len;
2842 unsigned int i;
2843 unsigned int temp;
2844 unsigned int compressing;
2845 int j;
2846
2847 len = 0;
2848 compressing = 0;
2849 for (j = 0; j < 16; j += 2) {
2850
2851 #ifdef V4MAPPEDPREFIX
2852 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2853 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2854 temp = strlen(s);
2855 return len + temp;
2856 }
2857 #endif
2858 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2859 (unsigned long)(unsigned char)ip[j + 1];
2860 if (temp == 0) {
2861 if (!compressing) {
2862 compressing = 1;
2863 if (j == 0) {
2864 *s++ = ':';
2865 ++len;
2866 }
2867 }
2868 } else {
2869 if (compressing) {
2870 compressing = 0;
2871 *s++ = ':';
2872 ++len;
2873 }
2874 i = fmt_xlong(s, temp);
2875 len += i;
2876 s += i;
2877 if (j < 14) {
2878 *s++ = ':';
2879 ++len;
2880 }
2881 }
2882 }
2883 if (compressing) {
2884 *s++ = ':';
2885 ++len;
2886 }
2887 *s = 0;
2888 return len;
2889 }
2890
2891 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2892 struct pktgen_dev *pkt_dev)
2893 {
2894 struct sk_buff *skb = NULL;
2895 __u8 *eth;
2896 struct udphdr *udph;
2897 int datalen;
2898 struct ipv6hdr *iph;
2899 struct pktgen_hdr *pgh = NULL;
2900 __be16 protocol = htons(ETH_P_IPV6);
2901 __be32 *mpls;
2902 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2903 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2904 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2905 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2906
2907 if (pkt_dev->nr_labels)
2908 protocol = htons(ETH_P_MPLS_UC);
2909
2910 if (pkt_dev->vlan_id != 0xffff)
2911 protocol = htons(ETH_P_8021Q);
2912
2913 /* Update any of the values, used when we're incrementing various
2914 * fields.
2915 */
2916 mod_cur_headers(pkt_dev);
2917
2918 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16 +
2919 pkt_dev->pkt_overhead, GFP_ATOMIC);
2920 if (!skb) {
2921 sprintf(pkt_dev->result, "No memory");
2922 return NULL;
2923 }
2924
2925 skb_reserve(skb, 16);
2926
2927 /* Reserve for ethernet and IP header */
2928 eth = (__u8 *) skb_push(skb, 14);
2929 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2930 if (pkt_dev->nr_labels)
2931 mpls_push(mpls, pkt_dev);
2932
2933 if (pkt_dev->vlan_id != 0xffff) {
2934 if (pkt_dev->svlan_id != 0xffff) {
2935 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2936 *svlan_tci = build_tci(pkt_dev->svlan_id,
2937 pkt_dev->svlan_cfi,
2938 pkt_dev->svlan_p);
2939 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2940 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2941 }
2942 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2943 *vlan_tci = build_tci(pkt_dev->vlan_id,
2944 pkt_dev->vlan_cfi,
2945 pkt_dev->vlan_p);
2946 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2947 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2948 }
2949
2950 skb->network_header = skb->tail;
2951 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2952 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2953 skb->queue_mapping = pkt_dev->cur_queue_map;
2954
2955 iph = ipv6_hdr(skb);
2956 udph = udp_hdr(skb);
2957
2958 memcpy(eth, pkt_dev->hh, 12);
2959 *(__be16 *) & eth[12] = protocol;
2960
2961 /* Eth + IPh + UDPh + mpls */
2962 datalen = pkt_dev->cur_pkt_size - 14 -
2963 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2964 pkt_dev->pkt_overhead;
2965
2966 if (datalen < sizeof(struct pktgen_hdr)) {
2967 datalen = sizeof(struct pktgen_hdr);
2968 if (net_ratelimit())
2969 printk(KERN_INFO "pktgen: increased datalen to %d\n",
2970 datalen);
2971 }
2972
2973 udph->source = htons(pkt_dev->cur_udp_src);
2974 udph->dest = htons(pkt_dev->cur_udp_dst);
2975 udph->len = htons(datalen + sizeof(struct udphdr));
2976 udph->check = 0; /* No checksum */
2977
2978 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2979
2980 if (pkt_dev->traffic_class) {
2981 /* Version + traffic class + flow (0) */
2982 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2983 }
2984
2985 iph->hop_limit = 32;
2986
2987 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2988 iph->nexthdr = IPPROTO_UDP;
2989
2990 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2991 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2992
2993 skb->mac_header = (skb->network_header - ETH_HLEN -
2994 pkt_dev->pkt_overhead);
2995 skb->protocol = protocol;
2996 skb->dev = odev;
2997 skb->pkt_type = PACKET_HOST;
2998
2999 if (pkt_dev->nfrags <= 0)
3000 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
3001 else {
3002 int frags = pkt_dev->nfrags;
3003 int i;
3004
3005 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
3006
3007 if (frags > MAX_SKB_FRAGS)
3008 frags = MAX_SKB_FRAGS;
3009 if (datalen > frags * PAGE_SIZE) {
3010 skb_put(skb, datalen - frags * PAGE_SIZE);
3011 datalen = frags * PAGE_SIZE;
3012 }
3013
3014 i = 0;
3015 while (datalen > 0) {
3016 struct page *page = alloc_pages(GFP_KERNEL, 0);
3017 skb_shinfo(skb)->frags[i].page = page;
3018 skb_shinfo(skb)->frags[i].page_offset = 0;
3019 skb_shinfo(skb)->frags[i].size =
3020 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
3021 datalen -= skb_shinfo(skb)->frags[i].size;
3022 skb->len += skb_shinfo(skb)->frags[i].size;
3023 skb->data_len += skb_shinfo(skb)->frags[i].size;
3024 i++;
3025 skb_shinfo(skb)->nr_frags = i;
3026 }
3027
3028 while (i < frags) {
3029 int rem;
3030
3031 if (i == 0)
3032 break;
3033
3034 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
3035 if (rem == 0)
3036 break;
3037
3038 skb_shinfo(skb)->frags[i - 1].size -= rem;
3039
3040 skb_shinfo(skb)->frags[i] =
3041 skb_shinfo(skb)->frags[i - 1];
3042 get_page(skb_shinfo(skb)->frags[i].page);
3043 skb_shinfo(skb)->frags[i].page =
3044 skb_shinfo(skb)->frags[i - 1].page;
3045 skb_shinfo(skb)->frags[i].page_offset +=
3046 skb_shinfo(skb)->frags[i - 1].size;
3047 skb_shinfo(skb)->frags[i].size = rem;
3048 i++;
3049 skb_shinfo(skb)->nr_frags = i;
3050 }
3051 }
3052
3053 /* Stamp the time, and sequence number, convert them to network byte order */
3054 /* should we update cloned packets too ? */
3055 if (pgh) {
3056 struct timeval timestamp;
3057
3058 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
3059 pgh->seq_num = htonl(pkt_dev->seq_num);
3060
3061 do_gettimeofday(&timestamp);
3062 pgh->tv_sec = htonl(timestamp.tv_sec);
3063 pgh->tv_usec = htonl(timestamp.tv_usec);
3064 }
3065 /* pkt_dev->seq_num++; FF: you really mean this? */
3066
3067 return skb;
3068 }
3069
3070 static inline struct sk_buff *fill_packet(struct net_device *odev,
3071 struct pktgen_dev *pkt_dev)
3072 {
3073 if (pkt_dev->flags & F_IPV6)
3074 return fill_packet_ipv6(odev, pkt_dev);
3075 else
3076 return fill_packet_ipv4(odev, pkt_dev);
3077 }
3078
3079 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3080 {
3081 pkt_dev->seq_num = 1;
3082 pkt_dev->idle_acc = 0;
3083 pkt_dev->sofar = 0;
3084 pkt_dev->tx_bytes = 0;
3085 pkt_dev->errors = 0;
3086 }
3087
3088 /* Set up structure for sending pkts, clear counters */
3089
3090 static void pktgen_run(struct pktgen_thread *t)
3091 {
3092 struct pktgen_dev *pkt_dev;
3093 int started = 0;
3094
3095 pr_debug("pktgen: entering pktgen_run. %p\n", t);
3096
3097 if_lock(t);
3098 list_for_each_entry(pkt_dev, &t->if_list, list) {
3099
3100 /*
3101 * setup odev and create initial packet.
3102 */
3103 pktgen_setup_inject(pkt_dev);
3104
3105 if (pkt_dev->odev) {
3106 pktgen_clear_counters(pkt_dev);
3107 pkt_dev->running = 1; /* Cranke yeself! */
3108 pkt_dev->skb = NULL;
3109 pkt_dev->started_at = getCurUs();
3110 pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */
3111 pkt_dev->next_tx_ns = 0;
3112 set_pkt_overhead(pkt_dev);
3113
3114 strcpy(pkt_dev->result, "Starting");
3115 started++;
3116 } else
3117 strcpy(pkt_dev->result, "Error starting");
3118 }
3119 if_unlock(t);
3120 if (started)
3121 t->control &= ~(T_STOP);
3122 }
3123
3124 static void pktgen_stop_all_threads_ifs(void)
3125 {
3126 struct pktgen_thread *t;
3127
3128 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n");
3129
3130 mutex_lock(&pktgen_thread_lock);
3131
3132 list_for_each_entry(t, &pktgen_threads, th_list)
3133 t->control |= T_STOP;
3134
3135 mutex_unlock(&pktgen_thread_lock);
3136 }
3137
3138 static int thread_is_running(struct pktgen_thread *t)
3139 {
3140 struct pktgen_dev *pkt_dev;
3141 int res = 0;
3142
3143 list_for_each_entry(pkt_dev, &t->if_list, list)
3144 if (pkt_dev->running) {
3145 res = 1;
3146 break;
3147 }
3148 return res;
3149 }
3150
3151 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3152 {
3153 if_lock(t);
3154
3155 while (thread_is_running(t)) {
3156
3157 if_unlock(t);
3158
3159 msleep_interruptible(100);
3160
3161 if (signal_pending(current))
3162 goto signal;
3163 if_lock(t);
3164 }
3165 if_unlock(t);
3166 return 1;
3167 signal:
3168 return 0;
3169 }
3170
3171 static int pktgen_wait_all_threads_run(void)
3172 {
3173 struct pktgen_thread *t;
3174 int sig = 1;
3175
3176 mutex_lock(&pktgen_thread_lock);
3177
3178 list_for_each_entry(t, &pktgen_threads, th_list) {
3179 sig = pktgen_wait_thread_run(t);
3180 if (sig == 0)
3181 break;
3182 }
3183
3184 if (sig == 0)
3185 list_for_each_entry(t, &pktgen_threads, th_list)
3186 t->control |= (T_STOP);
3187
3188 mutex_unlock(&pktgen_thread_lock);
3189 return sig;
3190 }
3191
3192 static void pktgen_run_all_threads(void)
3193 {
3194 struct pktgen_thread *t;
3195
3196 pr_debug("pktgen: entering pktgen_run_all_threads.\n");
3197
3198 mutex_lock(&pktgen_thread_lock);
3199
3200 list_for_each_entry(t, &pktgen_threads, th_list)
3201 t->control |= (T_RUN);
3202
3203 mutex_unlock(&pktgen_thread_lock);
3204
3205 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
3206
3207 pktgen_wait_all_threads_run();
3208 }
3209
3210 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3211 {
3212 __u64 total_us, bps, mbps, pps, idle;
3213 char *p = pkt_dev->result;
3214
3215 total_us = pkt_dev->stopped_at - pkt_dev->started_at;
3216
3217 idle = pkt_dev->idle_acc;
3218
3219 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3220 (unsigned long long)total_us,
3221 (unsigned long long)(total_us - idle),
3222 (unsigned long long)idle,
3223 (unsigned long long)pkt_dev->sofar,
3224 pkt_dev->cur_pkt_size, nr_frags);
3225
3226 pps = pkt_dev->sofar * USEC_PER_SEC;
3227
3228 while ((total_us >> 32) != 0) {
3229 pps >>= 1;
3230 total_us >>= 1;
3231 }
3232
3233 do_div(pps, total_us);
3234
3235 bps = pps * 8 * pkt_dev->cur_pkt_size;
3236
3237 mbps = bps;
3238 do_div(mbps, 1000000);
3239 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3240 (unsigned long long)pps,
3241 (unsigned long long)mbps,
3242 (unsigned long long)bps,
3243 (unsigned long long)pkt_dev->errors);
3244 }
3245
3246 /* Set stopped-at timer, remove from running list, do counters & statistics */
3247
3248 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3249 {
3250 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3251
3252 if (!pkt_dev->running) {
3253 printk(KERN_WARNING "pktgen: interface: %s is already "
3254 "stopped\n", pkt_dev->odev->name);
3255 return -EINVAL;
3256 }
3257
3258 pkt_dev->stopped_at = getCurUs();
3259 pkt_dev->running = 0;
3260
3261 show_results(pkt_dev, nr_frags);
3262
3263 return 0;
3264 }
3265
3266 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3267 {
3268 struct pktgen_dev *pkt_dev, *best = NULL;
3269
3270 if_lock(t);
3271
3272 list_for_each_entry(pkt_dev, &t->if_list, list) {
3273 if (!pkt_dev->running)
3274 continue;
3275 if (best == NULL)
3276 best = pkt_dev;
3277 else if (pkt_dev->next_tx_us < best->next_tx_us)
3278 best = pkt_dev;
3279 }
3280 if_unlock(t);
3281 return best;
3282 }
3283
3284 static void pktgen_stop(struct pktgen_thread *t)
3285 {
3286 struct pktgen_dev *pkt_dev;
3287
3288 pr_debug("pktgen: entering pktgen_stop\n");
3289
3290 if_lock(t);
3291
3292 list_for_each_entry(pkt_dev, &t->if_list, list) {
3293 pktgen_stop_device(pkt_dev);
3294 if (pkt_dev->skb)
3295 kfree_skb(pkt_dev->skb);
3296
3297 pkt_dev->skb = NULL;
3298 }
3299
3300 if_unlock(t);
3301 }
3302
3303 /*
3304 * one of our devices needs to be removed - find it
3305 * and remove it
3306 */
3307 static void pktgen_rem_one_if(struct pktgen_thread *t)
3308 {
3309 struct list_head *q, *n;
3310 struct pktgen_dev *cur;
3311
3312 pr_debug("pktgen: entering pktgen_rem_one_if\n");
3313
3314 if_lock(t);
3315
3316 list_for_each_safe(q, n, &t->if_list) {
3317 cur = list_entry(q, struct pktgen_dev, list);
3318
3319 if (!cur->removal_mark)
3320 continue;
3321
3322 if (cur->skb)
3323 kfree_skb(cur->skb);
3324 cur->skb = NULL;
3325
3326 pktgen_remove_device(t, cur);
3327
3328 break;
3329 }
3330
3331 if_unlock(t);
3332 }
3333
3334 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3335 {
3336 struct list_head *q, *n;
3337 struct pktgen_dev *cur;
3338
3339 /* Remove all devices, free mem */
3340
3341 pr_debug("pktgen: entering pktgen_rem_all_ifs\n");
3342 if_lock(t);
3343
3344 list_for_each_safe(q, n, &t->if_list) {
3345 cur = list_entry(q, struct pktgen_dev, list);
3346
3347 if (cur->skb)
3348 kfree_skb(cur->skb);
3349 cur->skb = NULL;
3350
3351 pktgen_remove_device(t, cur);
3352 }
3353
3354 if_unlock(t);
3355 }
3356
3357 static void pktgen_rem_thread(struct pktgen_thread *t)
3358 {
3359 /* Remove from the thread list */
3360
3361 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3362
3363 mutex_lock(&pktgen_thread_lock);
3364
3365 list_del(&t->th_list);
3366
3367 mutex_unlock(&pktgen_thread_lock);
3368 }
3369
3370 static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
3371 {
3372 struct net_device *odev = NULL;
3373 __u64 idle_start = 0;
3374 int ret;
3375
3376 odev = pkt_dev->odev;
3377
3378 if (pkt_dev->delay_us || pkt_dev->delay_ns) {
3379 u64 now;
3380
3381 now = getCurUs();
3382 if (now < pkt_dev->next_tx_us)
3383 spin(pkt_dev, pkt_dev->next_tx_us);
3384
3385 /* This is max DELAY, this has special meaning of
3386 * "never transmit"
3387 */
3388 if (pkt_dev->delay_us == 0x7FFFFFFF) {
3389 pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us;
3390 pkt_dev->next_tx_ns = pkt_dev->delay_ns;
3391 goto out;
3392 }
3393 }
3394
3395 if ((netif_queue_stopped(odev) ||
3396 (pkt_dev->skb &&
3397 netif_subqueue_stopped(odev, pkt_dev->skb->queue_mapping))) ||
3398 need_resched()) {
3399 idle_start = getCurUs();
3400
3401 if (!netif_running(odev)) {
3402 pktgen_stop_device(pkt_dev);
3403 if (pkt_dev->skb)
3404 kfree_skb(pkt_dev->skb);
3405 pkt_dev->skb = NULL;
3406 goto out;
3407 }
3408 if (need_resched())
3409 schedule();
3410
3411 pkt_dev->idle_acc += getCurUs() - idle_start;
3412
3413 if (netif_queue_stopped(odev) ||
3414 netif_subqueue_stopped(odev, pkt_dev->skb->queue_mapping)) {
3415 pkt_dev->next_tx_us = getCurUs(); /* TODO */
3416 pkt_dev->next_tx_ns = 0;
3417 goto out; /* Try the next interface */
3418 }
3419 }
3420
3421 if (pkt_dev->last_ok || !pkt_dev->skb) {
3422 if ((++pkt_dev->clone_count >= pkt_dev->clone_skb)
3423 || (!pkt_dev->skb)) {
3424 /* build a new pkt */
3425 if (pkt_dev->skb)
3426 kfree_skb(pkt_dev->skb);
3427
3428 pkt_dev->skb = fill_packet(odev, pkt_dev);
3429 if (pkt_dev->skb == NULL) {
3430 printk(KERN_ERR "pktgen: ERROR: couldn't "
3431 "allocate skb in fill_packet.\n");
3432 schedule();
3433 pkt_dev->clone_count--; /* back out increment, OOM */
3434 goto out;
3435 }
3436 pkt_dev->allocated_skbs++;
3437 pkt_dev->clone_count = 0; /* reset counter */
3438 }
3439 }
3440
3441 netif_tx_lock_bh(odev);
3442 if (!netif_queue_stopped(odev) &&
3443 !netif_subqueue_stopped(odev, pkt_dev->skb->queue_mapping)) {
3444
3445 atomic_inc(&(pkt_dev->skb->users));
3446 retry_now:
3447 ret = odev->hard_start_xmit(pkt_dev->skb, odev);
3448 if (likely(ret == NETDEV_TX_OK)) {
3449 pkt_dev->last_ok = 1;
3450 pkt_dev->sofar++;
3451 pkt_dev->seq_num++;
3452 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size;
3453
3454 } else if (ret == NETDEV_TX_LOCKED
3455 && (odev->features & NETIF_F_LLTX)) {
3456 cpu_relax();
3457 goto retry_now;
3458 } else { /* Retry it next time */
3459
3460 atomic_dec(&(pkt_dev->skb->users));
3461
3462 if (debug && net_ratelimit())
3463 printk(KERN_INFO "pktgen: Hard xmit error\n");
3464
3465 pkt_dev->errors++;
3466 pkt_dev->last_ok = 0;
3467 }
3468
3469 pkt_dev->next_tx_us = getCurUs();
3470 pkt_dev->next_tx_ns = 0;
3471
3472 pkt_dev->next_tx_us += pkt_dev->delay_us;
3473 pkt_dev->next_tx_ns += pkt_dev->delay_ns;
3474
3475 if (pkt_dev->next_tx_ns > 1000) {
3476 pkt_dev->next_tx_us++;
3477 pkt_dev->next_tx_ns -= 1000;
3478 }
3479 }
3480
3481 else { /* Retry it next time */
3482 pkt_dev->last_ok = 0;
3483 pkt_dev->next_tx_us = getCurUs(); /* TODO */
3484 pkt_dev->next_tx_ns = 0;
3485 }
3486
3487 netif_tx_unlock_bh(odev);
3488
3489 /* If pkt_dev->count is zero, then run forever */
3490 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3491 if (atomic_read(&(pkt_dev->skb->users)) != 1) {
3492 idle_start = getCurUs();
3493 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3494 if (signal_pending(current)) {
3495 break;
3496 }
3497 schedule();
3498 }
3499 pkt_dev->idle_acc += getCurUs() - idle_start;
3500 }
3501
3502 /* Done with this */
3503 pktgen_stop_device(pkt_dev);
3504 if (pkt_dev->skb)
3505 kfree_skb(pkt_dev->skb);
3506 pkt_dev->skb = NULL;
3507 }
3508 out:;
3509 }
3510
3511 /*
3512 * Main loop of the thread goes here
3513 */
3514
3515 static int pktgen_thread_worker(void *arg)
3516 {
3517 DEFINE_WAIT(wait);
3518 struct pktgen_thread *t = arg;
3519 struct pktgen_dev *pkt_dev = NULL;
3520 int cpu = t->cpu;
3521
3522 BUG_ON(smp_processor_id() != cpu);
3523
3524 init_waitqueue_head(&t->queue);
3525
3526 pr_debug("pktgen: starting pktgen/%d: pid=%d\n", cpu, current->pid);
3527
3528 set_current_state(TASK_INTERRUPTIBLE);
3529
3530 set_freezable();
3531
3532 while (!kthread_should_stop()) {
3533 pkt_dev = next_to_run(t);
3534
3535 if (!pkt_dev &&
3536 (t->control & (T_STOP | T_RUN | T_REMDEVALL | T_REMDEV))
3537 == 0) {
3538 prepare_to_wait(&(t->queue), &wait,
3539 TASK_INTERRUPTIBLE);
3540 schedule_timeout(HZ / 10);
3541 finish_wait(&(t->queue), &wait);
3542 }
3543
3544 __set_current_state(TASK_RUNNING);
3545
3546 if (pkt_dev)
3547 pktgen_xmit(pkt_dev);
3548
3549 if (t->control & T_STOP) {
3550 pktgen_stop(t);
3551 t->control &= ~(T_STOP);
3552 }
3553
3554 if (t->control & T_RUN) {
3555 pktgen_run(t);
3556 t->control &= ~(T_RUN);
3557 }
3558
3559 if (t->control & T_REMDEVALL) {
3560 pktgen_rem_all_ifs(t);
3561 t->control &= ~(T_REMDEVALL);
3562 }
3563
3564 if (t->control & T_REMDEV) {
3565 pktgen_rem_one_if(t);
3566 t->control &= ~(T_REMDEV);
3567 }
3568
3569 try_to_freeze();
3570
3571 set_current_state(TASK_INTERRUPTIBLE);
3572 }
3573
3574 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm);
3575 pktgen_stop(t);
3576
3577 pr_debug("pktgen: %s removing all device\n", t->tsk->comm);
3578 pktgen_rem_all_ifs(t);
3579
3580 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm);
3581 pktgen_rem_thread(t);
3582
3583 return 0;
3584 }
3585
3586 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3587 const char *ifname)
3588 {
3589 struct pktgen_dev *p, *pkt_dev = NULL;
3590 if_lock(t);
3591
3592 list_for_each_entry(p, &t->if_list, list)
3593 if (strncmp(p->odev->name, ifname, IFNAMSIZ) == 0) {
3594 pkt_dev = p;
3595 break;
3596 }
3597
3598 if_unlock(t);
3599 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev);
3600 return pkt_dev;
3601 }
3602
3603 /*
3604 * Adds a dev at front of if_list.
3605 */
3606
3607 static int add_dev_to_thread(struct pktgen_thread *t,
3608 struct pktgen_dev *pkt_dev)
3609 {
3610 int rv = 0;
3611
3612 if_lock(t);
3613
3614 if (pkt_dev->pg_thread) {
3615 printk(KERN_ERR "pktgen: ERROR: already assigned "
3616 "to a thread.\n");
3617 rv = -EBUSY;
3618 goto out;
3619 }
3620
3621 list_add(&pkt_dev->list, &t->if_list);
3622 pkt_dev->pg_thread = t;
3623 pkt_dev->running = 0;
3624
3625 out:
3626 if_unlock(t);
3627 return rv;
3628 }
3629
3630 /* Called under thread lock */
3631
3632 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3633 {
3634 struct pktgen_dev *pkt_dev;
3635 int err;
3636
3637 /* We don't allow a device to be on several threads */
3638
3639 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3640 if (pkt_dev) {
3641 printk(KERN_ERR "pktgen: ERROR: interface already used.\n");
3642 return -EBUSY;
3643 }
3644
3645 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
3646 if (!pkt_dev)
3647 return -ENOMEM;
3648
3649 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state));
3650 if (pkt_dev->flows == NULL) {
3651 kfree(pkt_dev);
3652 return -ENOMEM;
3653 }
3654 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3655
3656 pkt_dev->removal_mark = 0;
3657 pkt_dev->min_pkt_size = ETH_ZLEN;
3658 pkt_dev->max_pkt_size = ETH_ZLEN;
3659 pkt_dev->nfrags = 0;
3660 pkt_dev->clone_skb = pg_clone_skb_d;
3661 pkt_dev->delay_us = pg_delay_d / 1000;
3662 pkt_dev->delay_ns = pg_delay_d % 1000;
3663 pkt_dev->count = pg_count_d;
3664 pkt_dev->sofar = 0;
3665 pkt_dev->udp_src_min = 9; /* sink port */
3666 pkt_dev->udp_src_max = 9;
3667 pkt_dev->udp_dst_min = 9;
3668 pkt_dev->udp_dst_max = 9;
3669
3670 pkt_dev->vlan_p = 0;
3671 pkt_dev->vlan_cfi = 0;
3672 pkt_dev->vlan_id = 0xffff;
3673 pkt_dev->svlan_p = 0;
3674 pkt_dev->svlan_cfi = 0;
3675 pkt_dev->svlan_id = 0xffff;
3676
3677 err = pktgen_setup_dev(pkt_dev, ifname);
3678 if (err)
3679 goto out1;
3680
3681 pkt_dev->entry = create_proc_entry(ifname, 0600, pg_proc_dir);
3682 if (!pkt_dev->entry) {
3683 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3684 PG_PROC_DIR, ifname);
3685 err = -EINVAL;
3686 goto out2;
3687 }
3688 pkt_dev->entry->proc_fops = &pktgen_if_fops;
3689 pkt_dev->entry->data = pkt_dev;
3690 #ifdef CONFIG_XFRM
3691 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3692 pkt_dev->ipsproto = IPPROTO_ESP;
3693 #endif
3694
3695 return add_dev_to_thread(t, pkt_dev);
3696 out2:
3697 dev_put(pkt_dev->odev);
3698 out1:
3699 #ifdef CONFIG_XFRM
3700 free_SAs(pkt_dev);
3701 #endif
3702 if (pkt_dev->flows)
3703 vfree(pkt_dev->flows);
3704 kfree(pkt_dev);
3705 return err;
3706 }
3707
3708 static int __init pktgen_create_thread(int cpu)
3709 {
3710 struct pktgen_thread *t;
3711 struct proc_dir_entry *pe;
3712 struct task_struct *p;
3713
3714 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL);
3715 if (!t) {
3716 printk(KERN_ERR "pktgen: ERROR: out of memory, can't "
3717 "create new thread.\n");
3718 return -ENOMEM;
3719 }
3720
3721 spin_lock_init(&t->if_lock);
3722 t->cpu = cpu;
3723
3724 INIT_LIST_HEAD(&t->if_list);
3725
3726 list_add_tail(&t->th_list, &pktgen_threads);
3727
3728 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu);
3729 if (IS_ERR(p)) {
3730 printk(KERN_ERR "pktgen: kernel_thread() failed "
3731 "for cpu %d\n", t->cpu);
3732 list_del(&t->th_list);
3733 kfree(t);
3734 return PTR_ERR(p);
3735 }
3736 kthread_bind(p, cpu);
3737 t->tsk = p;
3738
3739 pe = create_proc_entry(t->tsk->comm, 0600, pg_proc_dir);
3740 if (!pe) {
3741 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3742 PG_PROC_DIR, t->tsk->comm);
3743 kthread_stop(p);
3744 list_del(&t->th_list);
3745 kfree(t);
3746 return -EINVAL;
3747 }
3748
3749 pe->proc_fops = &pktgen_thread_fops;
3750 pe->data = t;
3751
3752 wake_up_process(p);
3753
3754 return 0;
3755 }
3756
3757 /*
3758 * Removes a device from the thread if_list.
3759 */
3760 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3761 struct pktgen_dev *pkt_dev)
3762 {
3763 struct list_head *q, *n;
3764 struct pktgen_dev *p;
3765
3766 list_for_each_safe(q, n, &t->if_list) {
3767 p = list_entry(q, struct pktgen_dev, list);
3768 if (p == pkt_dev)
3769 list_del(&p->list);
3770 }
3771 }
3772
3773 static int pktgen_remove_device(struct pktgen_thread *t,
3774 struct pktgen_dev *pkt_dev)
3775 {
3776
3777 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev);
3778
3779 if (pkt_dev->running) {
3780 printk(KERN_WARNING "pktgen: WARNING: trying to remove a "
3781 "running interface, stopping it now.\n");
3782 pktgen_stop_device(pkt_dev);
3783 }
3784
3785 /* Dis-associate from the interface */
3786
3787 if (pkt_dev->odev) {
3788 dev_put(pkt_dev->odev);
3789 pkt_dev->odev = NULL;
3790 }
3791
3792 /* And update the thread if_list */
3793
3794 _rem_dev_from_if_list(t, pkt_dev);
3795
3796 if (pkt_dev->entry)
3797 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3798
3799 #ifdef CONFIG_XFRM
3800 free_SAs(pkt_dev);
3801 #endif
3802 if (pkt_dev->flows)
3803 vfree(pkt_dev->flows);
3804 kfree(pkt_dev);
3805 return 0;
3806 }
3807
3808 static int __init pg_init(void)
3809 {
3810 int cpu;
3811 struct proc_dir_entry *pe;
3812
3813 printk(KERN_INFO "%s", version);
3814
3815 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3816 if (!pg_proc_dir)
3817 return -ENODEV;
3818 pg_proc_dir->owner = THIS_MODULE;
3819
3820 pe = create_proc_entry(PGCTRL, 0600, pg_proc_dir);
3821 if (pe == NULL) {
3822 printk(KERN_ERR "pktgen: ERROR: cannot create %s "
3823 "procfs entry.\n", PGCTRL);
3824 proc_net_remove(&init_net, PG_PROC_DIR);
3825 return -EINVAL;
3826 }
3827
3828 pe->proc_fops = &pktgen_fops;
3829 pe->data = NULL;
3830
3831 /* Register us to receive netdevice events */
3832 register_netdevice_notifier(&pktgen_notifier_block);
3833
3834 for_each_online_cpu(cpu) {
3835 int err;
3836
3837 err = pktgen_create_thread(cpu);
3838 if (err)
3839 printk(KERN_WARNING "pktgen: WARNING: Cannot create "
3840 "thread for cpu %d (%d)\n", cpu, err);
3841 }
3842
3843 if (list_empty(&pktgen_threads)) {
3844 printk(KERN_ERR "pktgen: ERROR: Initialization failed for "
3845 "all threads\n");
3846 unregister_netdevice_notifier(&pktgen_notifier_block);
3847 remove_proc_entry(PGCTRL, pg_proc_dir);
3848 proc_net_remove(&init_net, PG_PROC_DIR);
3849 return -ENODEV;
3850 }
3851
3852 return 0;
3853 }
3854
3855 static void __exit pg_cleanup(void)
3856 {
3857 struct pktgen_thread *t;
3858 struct list_head *q, *n;
3859 wait_queue_head_t queue;
3860 init_waitqueue_head(&queue);
3861
3862 /* Stop all interfaces & threads */
3863
3864 list_for_each_safe(q, n, &pktgen_threads) {
3865 t = list_entry(q, struct pktgen_thread, th_list);
3866 kthread_stop(t->tsk);
3867 kfree(t);
3868 }
3869
3870 /* Un-register us from receiving netdevice events */
3871 unregister_netdevice_notifier(&pktgen_notifier_block);
3872
3873 /* Clean up proc file system */
3874 remove_proc_entry(PGCTRL, pg_proc_dir);
3875 proc_net_remove(&init_net, PG_PROC_DIR);
3876 }
3877
3878 module_init(pg_init);
3879 module_exit(pg_cleanup);
3880
3881 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se");
3882 MODULE_DESCRIPTION("Packet Generator tool");
3883 MODULE_LICENSE("GPL");
3884 module_param(pg_count_d, int, 0);
3885 module_param(pg_delay_d, int, 0);
3886 module_param(pg_clone_skb_d, int, 0);
3887 module_param(debug, int, 0);
kmemtrace - Kernel memory tracer