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Merge branch 'async-tx-fixes-for-linus' of git://lost.foo-projects.org/~dwillia2...
[deliverable/linux.git] / net / core / pktgen.c
1 /*
2 * Authors:
3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
4 * Uppsala University and
5 * Swedish University of Agricultural Sciences
6 *
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 * Ben Greear <greearb@candelatech.com>
9 * Jens Låås <jens.laas@data.slu.se>
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 *
16 *
17 * A tool for loading the network with preconfigurated packets.
18 * The tool is implemented as a linux module. Parameters are output
19 * device, delay (to hard_xmit), number of packets, and whether
20 * to use multiple SKBs or just the same one.
21 * pktgen uses the installed interface's output routine.
22 *
23 * Additional hacking by:
24 *
25 * Jens.Laas@data.slu.se
26 * Improved by ANK. 010120.
27 * Improved by ANK even more. 010212.
28 * MAC address typo fixed. 010417 --ro
29 * Integrated. 020301 --DaveM
30 * Added multiskb option 020301 --DaveM
31 * Scaling of results. 020417--sigurdur@linpro.no
32 * Significant re-work of the module:
33 * * Convert to threaded model to more efficiently be able to transmit
34 * and receive on multiple interfaces at once.
35 * * Converted many counters to __u64 to allow longer runs.
36 * * Allow configuration of ranges, like min/max IP address, MACs,
37 * and UDP-ports, for both source and destination, and can
38 * set to use a random distribution or sequentially walk the range.
39 * * Can now change most values after starting.
40 * * Place 12-byte packet in UDP payload with magic number,
41 * sequence number, and timestamp.
42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and
43 * latencies (with micro-second) precision.
44 * * Add IOCTL interface to easily get counters & configuration.
45 * --Ben Greear <greearb@candelatech.com>
46 *
47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
49 * as a "fastpath" with a configurable number of clones after alloc's.
50 * clone_skb=0 means all packets are allocated this also means ranges time
51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
52 * clones.
53 *
54 * Also moved to /proc/net/pktgen/
55 * --ro
56 *
57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
58 * mistakes. Also merged in DaveM's patch in the -pre6 patch.
59 * --Ben Greear <greearb@candelatech.com>
60 *
61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
62 *
63 *
64 * 021124 Finished major redesign and rewrite for new functionality.
65 * See Documentation/networking/pktgen.txt for how to use this.
66 *
67 * The new operation:
68 * For each CPU one thread/process is created at start. This process checks
69 * for running devices in the if_list and sends packets until count is 0 it
70 * also the thread checks the thread->control which is used for inter-process
71 * communication. controlling process "posts" operations to the threads this
72 * way. The if_lock should be possible to remove when add/rem_device is merged
73 * into this too.
74 *
75 * By design there should only be *one* "controlling" process. In practice
76 * multiple write accesses gives unpredictable result. Understood by "write"
77 * to /proc gives result code thats should be read be the "writer".
78 * For practical use this should be no problem.
79 *
80 * Note when adding devices to a specific CPU there good idea to also assign
81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
82 * --ro
83 *
84 * Fix refcount off by one if first packet fails, potential null deref,
85 * memleak 030710- KJP
86 *
87 * First "ranges" functionality for ipv6 030726 --ro
88 *
89 * Included flow support. 030802 ANK.
90 *
91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
92 *
93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
95 *
96 * New xmit() return, do_div and misc clean up by Stephen Hemminger
97 * <shemminger@osdl.org> 040923
98 *
99 * Randy Dunlap fixed u64 printk compiler waring
100 *
101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
103 *
104 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
106 *
107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
108 * 050103
109 *
110 * 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 */
115 #include <linux/sys.h>
116 #include <linux/types.h>
117 #include <linux/module.h>
118 #include <linux/moduleparam.h>
119 #include <linux/kernel.h>
120 #include <linux/mutex.h>
121 #include <linux/sched.h>
122 #include <linux/slab.h>
123 #include <linux/vmalloc.h>
124 #include <linux/unistd.h>
125 #include <linux/string.h>
126 #include <linux/ptrace.h>
127 #include <linux/errno.h>
128 #include <linux/ioport.h>
129 #include <linux/interrupt.h>
130 #include <linux/capability.h>
131 #include <linux/freezer.h>
132 #include <linux/delay.h>
133 #include <linux/timer.h>
134 #include <linux/list.h>
135 #include <linux/init.h>
136 #include <linux/skbuff.h>
137 #include <linux/netdevice.h>
138 #include <linux/inet.h>
139 #include <linux/inetdevice.h>
140 #include <linux/rtnetlink.h>
141 #include <linux/if_arp.h>
142 #include <linux/if_vlan.h>
143 #include <linux/in.h>
144 #include <linux/ip.h>
145 #include <linux/ipv6.h>
146 #include <linux/udp.h>
147 #include <linux/proc_fs.h>
148 #include <linux/seq_file.h>
149 #include <linux/wait.h>
150 #include <linux/etherdevice.h>
151 #include <linux/kthread.h>
152 #include <net/checksum.h>
153 #include <net/ipv6.h>
154 #include <net/addrconf.h>
155 #ifdef CONFIG_XFRM
156 #include <net/xfrm.h>
157 #endif
158 #include <asm/byteorder.h>
159 #include <linux/rcupdate.h>
160 #include <asm/bitops.h>
161 #include <asm/io.h>
162 #include <asm/dma.h>
163 #include <asm/uaccess.h>
164 #include <asm/div64.h> /* do_div */
165 #include <asm/timex.h>
166
167 #define VERSION "pktgen v2.68: Packet Generator for packet performance testing.\n"
168
169 /* The buckets are exponential in 'width' */
170 #define LAT_BUCKETS_MAX 32
171 #define IP_NAME_SZ 32
172 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
173 #define MPLS_STACK_BOTTOM htonl(0x00000100)
174
175 /* Device flag bits */
176 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
177 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
178 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
179 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
180 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
181 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
182 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
183 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
184 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
185 #define F_VID_RND (1<<9) /* Random VLAN ID */
186 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
187 #define F_FLOW_SEQ (1<<11) /* Sequential flows */
188 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */
189
190 /* Thread control flag bits */
191 #define T_TERMINATE (1<<0)
192 #define T_STOP (1<<1) /* Stop run */
193 #define T_RUN (1<<2) /* Start run */
194 #define T_REMDEVALL (1<<3) /* Remove all devs */
195 #define T_REMDEV (1<<4) /* Remove one dev */
196
197 /* If lock -- can be removed after some work */
198 #define if_lock(t) spin_lock(&(t->if_lock));
199 #define if_unlock(t) spin_unlock(&(t->if_lock));
200
201 /* Used to help with determining the pkts on receive */
202 #define PKTGEN_MAGIC 0xbe9be955
203 #define PG_PROC_DIR "pktgen"
204 #define PGCTRL "pgctrl"
205 static struct proc_dir_entry *pg_proc_dir = NULL;
206
207 #define MAX_CFLOWS 65536
208
209 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
210 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
211
212 struct flow_state {
213 __be32 cur_daddr;
214 int count;
215 #ifdef CONFIG_XFRM
216 struct xfrm_state *x;
217 #endif
218 __u32 flags;
219 };
220
221 /* flow flag bits */
222 #define F_INIT (1<<0) /* flow has been initialized */
223
224 struct pktgen_dev {
225 /*
226 * Try to keep frequent/infrequent used vars. separated.
227 */
228 struct proc_dir_entry *entry; /* proc file */
229 struct pktgen_thread *pg_thread;/* the owner */
230 struct list_head list; /* Used for chaining in the thread's run-queue */
231
232 int running; /* if this changes to false, the test will stop */
233
234 /* If min != max, then we will either do a linear iteration, or
235 * we will do a random selection from within the range.
236 */
237 __u32 flags;
238 int removal_mark; /* non-zero => the device is marked for
239 * removal by worker thread */
240
241 int min_pkt_size; /* = ETH_ZLEN; */
242 int max_pkt_size; /* = ETH_ZLEN; */
243 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
244 int nfrags;
245 __u32 delay_us; /* Default delay */
246 __u32 delay_ns;
247 __u64 count; /* Default No packets to send */
248 __u64 sofar; /* How many pkts we've sent so far */
249 __u64 tx_bytes; /* How many bytes we've transmitted */
250 __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */
251
252 /* runtime counters relating to clone_skb */
253 __u64 next_tx_us; /* timestamp of when to tx next */
254 __u32 next_tx_ns;
255
256 __u64 allocated_skbs;
257 __u32 clone_count;
258 int last_ok; /* Was last skb sent?
259 * Or a failed transmit of some sort? This will keep
260 * sequence numbers in order, for example.
261 */
262 __u64 started_at; /* micro-seconds */
263 __u64 stopped_at; /* micro-seconds */
264 __u64 idle_acc; /* micro-seconds */
265 __u32 seq_num;
266
267 int clone_skb; /* Use multiple SKBs during packet gen. If this number
268 * is greater than 1, then that many copies of the same
269 * packet will be sent before a new packet is allocated.
270 * For instance, if you want to send 1024 identical packets
271 * before creating a new packet, set clone_skb to 1024.
272 */
273
274 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
275 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
276 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
277 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
278
279 struct in6_addr in6_saddr;
280 struct in6_addr in6_daddr;
281 struct in6_addr cur_in6_daddr;
282 struct in6_addr cur_in6_saddr;
283 /* For ranges */
284 struct in6_addr min_in6_daddr;
285 struct in6_addr max_in6_daddr;
286 struct in6_addr min_in6_saddr;
287 struct in6_addr max_in6_saddr;
288
289 /* If we're doing ranges, random or incremental, then this
290 * defines the min/max for those ranges.
291 */
292 __be32 saddr_min; /* inclusive, source IP address */
293 __be32 saddr_max; /* exclusive, source IP address */
294 __be32 daddr_min; /* inclusive, dest IP address */
295 __be32 daddr_max; /* exclusive, dest IP address */
296
297 __u16 udp_src_min; /* inclusive, source UDP port */
298 __u16 udp_src_max; /* exclusive, source UDP port */
299 __u16 udp_dst_min; /* inclusive, dest UDP port */
300 __u16 udp_dst_max; /* exclusive, dest UDP port */
301
302 /* DSCP + ECN */
303 __u8 tos; /* six most significant bits of (former) IPv4 TOS are for dscp codepoint */
304 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 (see RFC 3260, sec. 4) */
305
306 /* MPLS */
307 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
308 __be32 labels[MAX_MPLS_LABELS];
309
310 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
311 __u8 vlan_p;
312 __u8 vlan_cfi;
313 __u16 vlan_id; /* 0xffff means no vlan tag */
314
315 __u8 svlan_p;
316 __u8 svlan_cfi;
317 __u16 svlan_id; /* 0xffff means no svlan tag */
318
319 __u32 src_mac_count; /* How many MACs to iterate through */
320 __u32 dst_mac_count; /* How many MACs to iterate through */
321
322 unsigned char dst_mac[ETH_ALEN];
323 unsigned char src_mac[ETH_ALEN];
324
325 __u32 cur_dst_mac_offset;
326 __u32 cur_src_mac_offset;
327 __be32 cur_saddr;
328 __be32 cur_daddr;
329 __u16 cur_udp_dst;
330 __u16 cur_udp_src;
331 __u32 cur_pkt_size;
332
333 __u8 hh[14];
334 /* = {
335 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
336
337 We fill in SRC address later
338 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
339 0x08, 0x00
340 };
341 */
342 __u16 pad; /* pad out the hh struct to an even 16 bytes */
343
344 struct sk_buff *skb; /* skb we are to transmit next, mainly used for when we
345 * are transmitting the same one multiple times
346 */
347 struct net_device *odev; /* The out-going device. Note that the device should
348 * have it's pg_info pointer pointing back to this
349 * device. This will be set when the user specifies
350 * the out-going device name (not when the inject is
351 * started as it used to do.)
352 */
353 struct flow_state *flows;
354 unsigned cflows; /* Concurrent flows (config) */
355 unsigned lflow; /* Flow length (config) */
356 unsigned nflows; /* accumulated flows (stats) */
357 unsigned curfl; /* current sequenced flow (state)*/
358 #ifdef CONFIG_XFRM
359 __u8 ipsmode; /* IPSEC mode (config) */
360 __u8 ipsproto; /* IPSEC type (config) */
361 #endif
362 char result[512];
363 };
364
365 struct pktgen_hdr {
366 __be32 pgh_magic;
367 __be32 seq_num;
368 __be32 tv_sec;
369 __be32 tv_usec;
370 };
371
372 struct pktgen_thread {
373 spinlock_t if_lock;
374 struct list_head if_list; /* All device here */
375 struct list_head th_list;
376 struct task_struct *tsk;
377 char result[512];
378 u32 max_before_softirq; /* We'll call do_softirq to prevent starvation. */
379
380 /* Field for thread to receive "posted" events terminate, stop ifs etc. */
381
382 u32 control;
383 int pid;
384 int cpu;
385
386 wait_queue_head_t queue;
387 };
388
389 #define REMOVE 1
390 #define FIND 0
391
392 /* This code works around the fact that do_div cannot handle two 64-bit
393 numbers, and regular 64-bit division doesn't work on x86 kernels.
394 --Ben
395 */
396
397 #define PG_DIV 0
398
399 /* This was emailed to LMKL by: Chris Caputo <ccaputo@alt.net>
400 * Function copied/adapted/optimized from:
401 *
402 * nemesis.sourceforge.net/browse/lib/static/intmath/ix86/intmath.c.html
403 *
404 * Copyright 1994, University of Cambridge Computer Laboratory
405 * All Rights Reserved.
406 *
407 */
408 static inline s64 divremdi3(s64 x, s64 y, int type)
409 {
410 u64 a = (x < 0) ? -x : x;
411 u64 b = (y < 0) ? -y : y;
412 u64 res = 0, d = 1;
413
414 if (b > 0) {
415 while (b < a) {
416 b <<= 1;
417 d <<= 1;
418 }
419 }
420
421 do {
422 if (a >= b) {
423 a -= b;
424 res += d;
425 }
426 b >>= 1;
427 d >>= 1;
428 }
429 while (d);
430
431 if (PG_DIV == type) {
432 return (((x ^ y) & (1ll << 63)) == 0) ? res : -(s64) res;
433 } else {
434 return ((x & (1ll << 63)) == 0) ? a : -(s64) a;
435 }
436 }
437
438 /* End of hacks to deal with 64-bit math on x86 */
439
440 /** Convert to milliseconds */
441 static inline __u64 tv_to_ms(const struct timeval *tv)
442 {
443 __u64 ms = tv->tv_usec / 1000;
444 ms += (__u64) tv->tv_sec * (__u64) 1000;
445 return ms;
446 }
447
448 /** Convert to micro-seconds */
449 static inline __u64 tv_to_us(const struct timeval *tv)
450 {
451 __u64 us = tv->tv_usec;
452 us += (__u64) tv->tv_sec * (__u64) 1000000;
453 return us;
454 }
455
456 static inline __u64 pg_div(__u64 n, __u32 base)
457 {
458 __u64 tmp = n;
459 do_div(tmp, base);
460 /* printk("pktgen: pg_div, n: %llu base: %d rv: %llu\n",
461 n, base, tmp); */
462 return tmp;
463 }
464
465 static inline __u64 pg_div64(__u64 n, __u64 base)
466 {
467 __u64 tmp = n;
468 /*
469 * How do we know if the architecture we are running on
470 * supports division with 64 bit base?
471 *
472 */
473 #if defined(__sparc_v9__) || defined(__powerpc64__) || defined(__alpha__) || defined(__x86_64__) || defined(__ia64__)
474
475 do_div(tmp, base);
476 #else
477 tmp = divremdi3(n, base, PG_DIV);
478 #endif
479 return tmp;
480 }
481
482 static inline __u64 getCurMs(void)
483 {
484 struct timeval tv;
485 do_gettimeofday(&tv);
486 return tv_to_ms(&tv);
487 }
488
489 static inline __u64 getCurUs(void)
490 {
491 struct timeval tv;
492 do_gettimeofday(&tv);
493 return tv_to_us(&tv);
494 }
495
496 static inline __u64 tv_diff(const struct timeval *a, const struct timeval *b)
497 {
498 return tv_to_us(a) - tv_to_us(b);
499 }
500
501 /* old include end */
502
503 static char version[] __initdata = VERSION;
504
505 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
506 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
507 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
508 const char *ifname);
509 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
510 static void pktgen_run_all_threads(void);
511 static void pktgen_stop_all_threads_ifs(void);
512 static int pktgen_stop_device(struct pktgen_dev *pkt_dev);
513 static void pktgen_stop(struct pktgen_thread *t);
514 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
515
516 static unsigned int scan_ip6(const char *s, char ip[16]);
517 static unsigned int fmt_ip6(char *s, const char ip[16]);
518
519 /* Module parameters, defaults. */
520 static int pg_count_d = 1000; /* 1000 pkts by default */
521 static int pg_delay_d;
522 static int pg_clone_skb_d;
523 static int debug;
524
525 static DEFINE_MUTEX(pktgen_thread_lock);
526 static LIST_HEAD(pktgen_threads);
527
528 static struct notifier_block pktgen_notifier_block = {
529 .notifier_call = pktgen_device_event,
530 };
531
532 /*
533 * /proc handling functions
534 *
535 */
536
537 static int pgctrl_show(struct seq_file *seq, void *v)
538 {
539 seq_puts(seq, VERSION);
540 return 0;
541 }
542
543 static ssize_t pgctrl_write(struct file *file, const char __user * buf,
544 size_t count, loff_t * ppos)
545 {
546 int err = 0;
547 char data[128];
548
549 if (!capable(CAP_NET_ADMIN)) {
550 err = -EPERM;
551 goto out;
552 }
553
554 if (count > sizeof(data))
555 count = sizeof(data);
556
557 if (copy_from_user(data, buf, count)) {
558 err = -EFAULT;
559 goto out;
560 }
561 data[count - 1] = 0; /* Make string */
562
563 if (!strcmp(data, "stop"))
564 pktgen_stop_all_threads_ifs();
565
566 else if (!strcmp(data, "start"))
567 pktgen_run_all_threads();
568
569 else
570 printk(KERN_WARNING "pktgen: Unknown command: %s\n", data);
571
572 err = count;
573
574 out:
575 return err;
576 }
577
578 static int pgctrl_open(struct inode *inode, struct file *file)
579 {
580 return single_open(file, pgctrl_show, PDE(inode)->data);
581 }
582
583 static const struct file_operations pktgen_fops = {
584 .owner = THIS_MODULE,
585 .open = pgctrl_open,
586 .read = seq_read,
587 .llseek = seq_lseek,
588 .write = pgctrl_write,
589 .release = single_release,
590 };
591
592 static int pktgen_if_show(struct seq_file *seq, void *v)
593 {
594 int i;
595 struct pktgen_dev *pkt_dev = seq->private;
596 __u64 sa;
597 __u64 stopped;
598 __u64 now = getCurUs();
599
600 seq_printf(seq,
601 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
602 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
603 pkt_dev->max_pkt_size);
604
605 seq_printf(seq,
606 " frags: %d delay: %u clone_skb: %d ifname: %s\n",
607 pkt_dev->nfrags,
608 1000 * pkt_dev->delay_us + pkt_dev->delay_ns,
609 pkt_dev->clone_skb, pkt_dev->odev->name);
610
611 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
612 pkt_dev->lflow);
613
614 if (pkt_dev->flags & F_IPV6) {
615 char b1[128], b2[128], b3[128];
616 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
617 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
618 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
619 seq_printf(seq,
620 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
621 b2, b3);
622
623 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
624 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
625 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
626 seq_printf(seq,
627 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
628 b2, b3);
629
630 } else
631 seq_printf(seq,
632 " dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n",
633 pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min,
634 pkt_dev->src_max);
635
636 seq_puts(seq, " src_mac: ");
637
638 if (is_zero_ether_addr(pkt_dev->src_mac))
639 for (i = 0; i < 6; i++)
640 seq_printf(seq, "%02X%s", pkt_dev->odev->dev_addr[i],
641 i == 5 ? " " : ":");
642 else
643 for (i = 0; i < 6; i++)
644 seq_printf(seq, "%02X%s", pkt_dev->src_mac[i],
645 i == 5 ? " " : ":");
646
647 seq_printf(seq, "dst_mac: ");
648 for (i = 0; i < 6; i++)
649 seq_printf(seq, "%02X%s", pkt_dev->dst_mac[i],
650 i == 5 ? "\n" : ":");
651
652 seq_printf(seq,
653 " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n",
654 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
655 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
656
657 seq_printf(seq,
658 " src_mac_count: %d dst_mac_count: %d\n",
659 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
660
661 if (pkt_dev->nr_labels) {
662 unsigned i;
663 seq_printf(seq, " mpls: ");
664 for (i = 0; i < pkt_dev->nr_labels; i++)
665 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
666 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
667 }
668
669 if (pkt_dev->vlan_id != 0xffff) {
670 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
671 pkt_dev->vlan_id, pkt_dev->vlan_p, pkt_dev->vlan_cfi);
672 }
673
674 if (pkt_dev->svlan_id != 0xffff) {
675 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
676 pkt_dev->svlan_id, pkt_dev->svlan_p, pkt_dev->svlan_cfi);
677 }
678
679 if (pkt_dev->tos) {
680 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
681 }
682
683 if (pkt_dev->traffic_class) {
684 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
685 }
686
687 seq_printf(seq, " Flags: ");
688
689 if (pkt_dev->flags & F_IPV6)
690 seq_printf(seq, "IPV6 ");
691
692 if (pkt_dev->flags & F_IPSRC_RND)
693 seq_printf(seq, "IPSRC_RND ");
694
695 if (pkt_dev->flags & F_IPDST_RND)
696 seq_printf(seq, "IPDST_RND ");
697
698 if (pkt_dev->flags & F_TXSIZE_RND)
699 seq_printf(seq, "TXSIZE_RND ");
700
701 if (pkt_dev->flags & F_UDPSRC_RND)
702 seq_printf(seq, "UDPSRC_RND ");
703
704 if (pkt_dev->flags & F_UDPDST_RND)
705 seq_printf(seq, "UDPDST_RND ");
706
707 if (pkt_dev->flags & F_MPLS_RND)
708 seq_printf(seq, "MPLS_RND ");
709
710 if (pkt_dev->cflows) {
711 if (pkt_dev->flags & F_FLOW_SEQ)
712 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
713 else
714 seq_printf(seq, "FLOW_RND ");
715 }
716
717 #ifdef CONFIG_XFRM
718 if (pkt_dev->flags & F_IPSEC_ON)
719 seq_printf(seq, "IPSEC ");
720 #endif
721
722 if (pkt_dev->flags & F_MACSRC_RND)
723 seq_printf(seq, "MACSRC_RND ");
724
725 if (pkt_dev->flags & F_MACDST_RND)
726 seq_printf(seq, "MACDST_RND ");
727
728 if (pkt_dev->flags & F_VID_RND)
729 seq_printf(seq, "VID_RND ");
730
731 if (pkt_dev->flags & F_SVID_RND)
732 seq_printf(seq, "SVID_RND ");
733
734 seq_puts(seq, "\n");
735
736 sa = pkt_dev->started_at;
737 stopped = pkt_dev->stopped_at;
738 if (pkt_dev->running)
739 stopped = now; /* not really stopped, more like last-running-at */
740
741 seq_printf(seq,
742 "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n",
743 (unsigned long long)pkt_dev->sofar,
744 (unsigned long long)pkt_dev->errors, (unsigned long long)sa,
745 (unsigned long long)stopped,
746 (unsigned long long)pkt_dev->idle_acc);
747
748 seq_printf(seq,
749 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
750 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
751 pkt_dev->cur_src_mac_offset);
752
753 if (pkt_dev->flags & F_IPV6) {
754 char b1[128], b2[128];
755 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
756 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
757 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
758 } else
759 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
760 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
761
762 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
763 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
764
765 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
766
767 if (pkt_dev->result[0])
768 seq_printf(seq, "Result: %s\n", pkt_dev->result);
769 else
770 seq_printf(seq, "Result: Idle\n");
771
772 return 0;
773 }
774
775
776 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, __u32 *num)
777 {
778 int i = 0;
779 *num = 0;
780
781 for (; i < maxlen; i++) {
782 char c;
783 *num <<= 4;
784 if (get_user(c, &user_buffer[i]))
785 return -EFAULT;
786 if ((c >= '0') && (c <= '9'))
787 *num |= c - '0';
788 else if ((c >= 'a') && (c <= 'f'))
789 *num |= c - 'a' + 10;
790 else if ((c >= 'A') && (c <= 'F'))
791 *num |= c - 'A' + 10;
792 else
793 break;
794 }
795 return i;
796 }
797
798 static int count_trail_chars(const char __user * user_buffer,
799 unsigned int maxlen)
800 {
801 int i;
802
803 for (i = 0; i < maxlen; i++) {
804 char c;
805 if (get_user(c, &user_buffer[i]))
806 return -EFAULT;
807 switch (c) {
808 case '\"':
809 case '\n':
810 case '\r':
811 case '\t':
812 case ' ':
813 case '=':
814 break;
815 default:
816 goto done;
817 }
818 }
819 done:
820 return i;
821 }
822
823 static unsigned long num_arg(const char __user * user_buffer,
824 unsigned long maxlen, unsigned long *num)
825 {
826 int i = 0;
827 *num = 0;
828
829 for (; i < maxlen; i++) {
830 char c;
831 if (get_user(c, &user_buffer[i]))
832 return -EFAULT;
833 if ((c >= '0') && (c <= '9')) {
834 *num *= 10;
835 *num += c - '0';
836 } else
837 break;
838 }
839 return i;
840 }
841
842 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
843 {
844 int i = 0;
845
846 for (; i < maxlen; i++) {
847 char c;
848 if (get_user(c, &user_buffer[i]))
849 return -EFAULT;
850 switch (c) {
851 case '\"':
852 case '\n':
853 case '\r':
854 case '\t':
855 case ' ':
856 goto done_str;
857 break;
858 default:
859 break;
860 }
861 }
862 done_str:
863 return i;
864 }
865
866 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
867 {
868 unsigned n = 0;
869 char c;
870 ssize_t i = 0;
871 int len;
872
873 pkt_dev->nr_labels = 0;
874 do {
875 __u32 tmp;
876 len = hex32_arg(&buffer[i], 8, &tmp);
877 if (len <= 0)
878 return len;
879 pkt_dev->labels[n] = htonl(tmp);
880 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
881 pkt_dev->flags |= F_MPLS_RND;
882 i += len;
883 if (get_user(c, &buffer[i]))
884 return -EFAULT;
885 i++;
886 n++;
887 if (n >= MAX_MPLS_LABELS)
888 return -E2BIG;
889 } while (c == ',');
890
891 pkt_dev->nr_labels = n;
892 return i;
893 }
894
895 static ssize_t pktgen_if_write(struct file *file,
896 const char __user * user_buffer, size_t count,
897 loff_t * offset)
898 {
899 struct seq_file *seq = (struct seq_file *)file->private_data;
900 struct pktgen_dev *pkt_dev = seq->private;
901 int i = 0, max, len;
902 char name[16], valstr[32];
903 unsigned long value = 0;
904 char *pg_result = NULL;
905 int tmp = 0;
906 char buf[128];
907
908 pg_result = &(pkt_dev->result[0]);
909
910 if (count < 1) {
911 printk(KERN_WARNING "pktgen: wrong command format\n");
912 return -EINVAL;
913 }
914
915 max = count - i;
916 tmp = count_trail_chars(&user_buffer[i], max);
917 if (tmp < 0) {
918 printk(KERN_WARNING "pktgen: illegal format\n");
919 return tmp;
920 }
921 i += tmp;
922
923 /* Read variable name */
924
925 len = strn_len(&user_buffer[i], sizeof(name) - 1);
926 if (len < 0) {
927 return len;
928 }
929 memset(name, 0, sizeof(name));
930 if (copy_from_user(name, &user_buffer[i], len))
931 return -EFAULT;
932 i += len;
933
934 max = count - i;
935 len = count_trail_chars(&user_buffer[i], max);
936 if (len < 0)
937 return len;
938
939 i += len;
940
941 if (debug) {
942 char tb[count + 1];
943 if (copy_from_user(tb, user_buffer, count))
944 return -EFAULT;
945 tb[count] = 0;
946 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name,
947 (unsigned long)count, tb);
948 }
949
950 if (!strcmp(name, "min_pkt_size")) {
951 len = num_arg(&user_buffer[i], 10, &value);
952 if (len < 0) {
953 return len;
954 }
955 i += len;
956 if (value < 14 + 20 + 8)
957 value = 14 + 20 + 8;
958 if (value != pkt_dev->min_pkt_size) {
959 pkt_dev->min_pkt_size = value;
960 pkt_dev->cur_pkt_size = value;
961 }
962 sprintf(pg_result, "OK: min_pkt_size=%u",
963 pkt_dev->min_pkt_size);
964 return count;
965 }
966
967 if (!strcmp(name, "max_pkt_size")) {
968 len = num_arg(&user_buffer[i], 10, &value);
969 if (len < 0) {
970 return len;
971 }
972 i += len;
973 if (value < 14 + 20 + 8)
974 value = 14 + 20 + 8;
975 if (value != pkt_dev->max_pkt_size) {
976 pkt_dev->max_pkt_size = value;
977 pkt_dev->cur_pkt_size = value;
978 }
979 sprintf(pg_result, "OK: max_pkt_size=%u",
980 pkt_dev->max_pkt_size);
981 return count;
982 }
983
984 /* Shortcut for min = max */
985
986 if (!strcmp(name, "pkt_size")) {
987 len = num_arg(&user_buffer[i], 10, &value);
988 if (len < 0) {
989 return len;
990 }
991 i += len;
992 if (value < 14 + 20 + 8)
993 value = 14 + 20 + 8;
994 if (value != pkt_dev->min_pkt_size) {
995 pkt_dev->min_pkt_size = value;
996 pkt_dev->max_pkt_size = value;
997 pkt_dev->cur_pkt_size = value;
998 }
999 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
1000 return count;
1001 }
1002
1003 if (!strcmp(name, "debug")) {
1004 len = num_arg(&user_buffer[i], 10, &value);
1005 if (len < 0) {
1006 return len;
1007 }
1008 i += len;
1009 debug = value;
1010 sprintf(pg_result, "OK: debug=%u", debug);
1011 return count;
1012 }
1013
1014 if (!strcmp(name, "frags")) {
1015 len = num_arg(&user_buffer[i], 10, &value);
1016 if (len < 0) {
1017 return len;
1018 }
1019 i += len;
1020 pkt_dev->nfrags = value;
1021 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
1022 return count;
1023 }
1024 if (!strcmp(name, "delay")) {
1025 len = num_arg(&user_buffer[i], 10, &value);
1026 if (len < 0) {
1027 return len;
1028 }
1029 i += len;
1030 if (value == 0x7FFFFFFF) {
1031 pkt_dev->delay_us = 0x7FFFFFFF;
1032 pkt_dev->delay_ns = 0;
1033 } else {
1034 pkt_dev->delay_us = value / 1000;
1035 pkt_dev->delay_ns = value % 1000;
1036 }
1037 sprintf(pg_result, "OK: delay=%u",
1038 1000 * pkt_dev->delay_us + pkt_dev->delay_ns);
1039 return count;
1040 }
1041 if (!strcmp(name, "udp_src_min")) {
1042 len = num_arg(&user_buffer[i], 10, &value);
1043 if (len < 0) {
1044 return len;
1045 }
1046 i += len;
1047 if (value != pkt_dev->udp_src_min) {
1048 pkt_dev->udp_src_min = value;
1049 pkt_dev->cur_udp_src = value;
1050 }
1051 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1052 return count;
1053 }
1054 if (!strcmp(name, "udp_dst_min")) {
1055 len = num_arg(&user_buffer[i], 10, &value);
1056 if (len < 0) {
1057 return len;
1058 }
1059 i += len;
1060 if (value != pkt_dev->udp_dst_min) {
1061 pkt_dev->udp_dst_min = value;
1062 pkt_dev->cur_udp_dst = value;
1063 }
1064 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1065 return count;
1066 }
1067 if (!strcmp(name, "udp_src_max")) {
1068 len = num_arg(&user_buffer[i], 10, &value);
1069 if (len < 0) {
1070 return len;
1071 }
1072 i += len;
1073 if (value != pkt_dev->udp_src_max) {
1074 pkt_dev->udp_src_max = value;
1075 pkt_dev->cur_udp_src = value;
1076 }
1077 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1078 return count;
1079 }
1080 if (!strcmp(name, "udp_dst_max")) {
1081 len = num_arg(&user_buffer[i], 10, &value);
1082 if (len < 0) {
1083 return len;
1084 }
1085 i += len;
1086 if (value != pkt_dev->udp_dst_max) {
1087 pkt_dev->udp_dst_max = value;
1088 pkt_dev->cur_udp_dst = value;
1089 }
1090 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1091 return count;
1092 }
1093 if (!strcmp(name, "clone_skb")) {
1094 len = num_arg(&user_buffer[i], 10, &value);
1095 if (len < 0) {
1096 return len;
1097 }
1098 i += len;
1099 pkt_dev->clone_skb = value;
1100
1101 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1102 return count;
1103 }
1104 if (!strcmp(name, "count")) {
1105 len = num_arg(&user_buffer[i], 10, &value);
1106 if (len < 0) {
1107 return len;
1108 }
1109 i += len;
1110 pkt_dev->count = value;
1111 sprintf(pg_result, "OK: count=%llu",
1112 (unsigned long long)pkt_dev->count);
1113 return count;
1114 }
1115 if (!strcmp(name, "src_mac_count")) {
1116 len = num_arg(&user_buffer[i], 10, &value);
1117 if (len < 0) {
1118 return len;
1119 }
1120 i += len;
1121 if (pkt_dev->src_mac_count != value) {
1122 pkt_dev->src_mac_count = value;
1123 pkt_dev->cur_src_mac_offset = 0;
1124 }
1125 sprintf(pg_result, "OK: src_mac_count=%d",
1126 pkt_dev->src_mac_count);
1127 return count;
1128 }
1129 if (!strcmp(name, "dst_mac_count")) {
1130 len = num_arg(&user_buffer[i], 10, &value);
1131 if (len < 0) {
1132 return len;
1133 }
1134 i += len;
1135 if (pkt_dev->dst_mac_count != value) {
1136 pkt_dev->dst_mac_count = value;
1137 pkt_dev->cur_dst_mac_offset = 0;
1138 }
1139 sprintf(pg_result, "OK: dst_mac_count=%d",
1140 pkt_dev->dst_mac_count);
1141 return count;
1142 }
1143 if (!strcmp(name, "flag")) {
1144 char f[32];
1145 memset(f, 0, 32);
1146 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1147 if (len < 0) {
1148 return len;
1149 }
1150 if (copy_from_user(f, &user_buffer[i], len))
1151 return -EFAULT;
1152 i += len;
1153 if (strcmp(f, "IPSRC_RND") == 0)
1154 pkt_dev->flags |= F_IPSRC_RND;
1155
1156 else if (strcmp(f, "!IPSRC_RND") == 0)
1157 pkt_dev->flags &= ~F_IPSRC_RND;
1158
1159 else if (strcmp(f, "TXSIZE_RND") == 0)
1160 pkt_dev->flags |= F_TXSIZE_RND;
1161
1162 else if (strcmp(f, "!TXSIZE_RND") == 0)
1163 pkt_dev->flags &= ~F_TXSIZE_RND;
1164
1165 else if (strcmp(f, "IPDST_RND") == 0)
1166 pkt_dev->flags |= F_IPDST_RND;
1167
1168 else if (strcmp(f, "!IPDST_RND") == 0)
1169 pkt_dev->flags &= ~F_IPDST_RND;
1170
1171 else if (strcmp(f, "UDPSRC_RND") == 0)
1172 pkt_dev->flags |= F_UDPSRC_RND;
1173
1174 else if (strcmp(f, "!UDPSRC_RND") == 0)
1175 pkt_dev->flags &= ~F_UDPSRC_RND;
1176
1177 else if (strcmp(f, "UDPDST_RND") == 0)
1178 pkt_dev->flags |= F_UDPDST_RND;
1179
1180 else if (strcmp(f, "!UDPDST_RND") == 0)
1181 pkt_dev->flags &= ~F_UDPDST_RND;
1182
1183 else if (strcmp(f, "MACSRC_RND") == 0)
1184 pkt_dev->flags |= F_MACSRC_RND;
1185
1186 else if (strcmp(f, "!MACSRC_RND") == 0)
1187 pkt_dev->flags &= ~F_MACSRC_RND;
1188
1189 else if (strcmp(f, "MACDST_RND") == 0)
1190 pkt_dev->flags |= F_MACDST_RND;
1191
1192 else if (strcmp(f, "!MACDST_RND") == 0)
1193 pkt_dev->flags &= ~F_MACDST_RND;
1194
1195 else if (strcmp(f, "MPLS_RND") == 0)
1196 pkt_dev->flags |= F_MPLS_RND;
1197
1198 else if (strcmp(f, "!MPLS_RND") == 0)
1199 pkt_dev->flags &= ~F_MPLS_RND;
1200
1201 else if (strcmp(f, "VID_RND") == 0)
1202 pkt_dev->flags |= F_VID_RND;
1203
1204 else if (strcmp(f, "!VID_RND") == 0)
1205 pkt_dev->flags &= ~F_VID_RND;
1206
1207 else if (strcmp(f, "SVID_RND") == 0)
1208 pkt_dev->flags |= F_SVID_RND;
1209
1210 else if (strcmp(f, "!SVID_RND") == 0)
1211 pkt_dev->flags &= ~F_SVID_RND;
1212
1213 else if (strcmp(f, "FLOW_SEQ") == 0)
1214 pkt_dev->flags |= F_FLOW_SEQ;
1215
1216 #ifdef CONFIG_XFRM
1217 else if (strcmp(f, "IPSEC") == 0)
1218 pkt_dev->flags |= F_IPSEC_ON;
1219 #endif
1220
1221 else if (strcmp(f, "!IPV6") == 0)
1222 pkt_dev->flags &= ~F_IPV6;
1223
1224 else {
1225 sprintf(pg_result,
1226 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1227 f,
1228 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1229 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC\n");
1230 return count;
1231 }
1232 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1233 return count;
1234 }
1235 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1236 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1237 if (len < 0) {
1238 return len;
1239 }
1240
1241 if (copy_from_user(buf, &user_buffer[i], len))
1242 return -EFAULT;
1243 buf[len] = 0;
1244 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1245 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1246 strncpy(pkt_dev->dst_min, buf, len);
1247 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1248 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1249 }
1250 if (debug)
1251 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1252 pkt_dev->dst_min);
1253 i += len;
1254 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1255 return count;
1256 }
1257 if (!strcmp(name, "dst_max")) {
1258 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1259 if (len < 0) {
1260 return len;
1261 }
1262
1263 if (copy_from_user(buf, &user_buffer[i], len))
1264 return -EFAULT;
1265
1266 buf[len] = 0;
1267 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1268 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1269 strncpy(pkt_dev->dst_max, buf, len);
1270 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1271 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1272 }
1273 if (debug)
1274 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1275 pkt_dev->dst_max);
1276 i += len;
1277 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1278 return count;
1279 }
1280 if (!strcmp(name, "dst6")) {
1281 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1282 if (len < 0)
1283 return len;
1284
1285 pkt_dev->flags |= F_IPV6;
1286
1287 if (copy_from_user(buf, &user_buffer[i], len))
1288 return -EFAULT;
1289 buf[len] = 0;
1290
1291 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1292 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1293
1294 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1295
1296 if (debug)
1297 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1298
1299 i += len;
1300 sprintf(pg_result, "OK: dst6=%s", buf);
1301 return count;
1302 }
1303 if (!strcmp(name, "dst6_min")) {
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->min_in6_daddr.s6_addr);
1315 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1316
1317 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1318 &pkt_dev->min_in6_daddr);
1319 if (debug)
1320 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1321
1322 i += len;
1323 sprintf(pg_result, "OK: dst6_min=%s", buf);
1324 return count;
1325 }
1326 if (!strcmp(name, "dst6_max")) {
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->max_in6_daddr.s6_addr);
1338 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1339
1340 if (debug)
1341 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1342
1343 i += len;
1344 sprintf(pg_result, "OK: dst6_max=%s", buf);
1345 return count;
1346 }
1347 if (!strcmp(name, "src6")) {
1348 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1349 if (len < 0)
1350 return len;
1351
1352 pkt_dev->flags |= F_IPV6;
1353
1354 if (copy_from_user(buf, &user_buffer[i], len))
1355 return -EFAULT;
1356 buf[len] = 0;
1357
1358 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1359 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1360
1361 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1362
1363 if (debug)
1364 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1365
1366 i += len;
1367 sprintf(pg_result, "OK: src6=%s", buf);
1368 return count;
1369 }
1370 if (!strcmp(name, "src_min")) {
1371 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1372 if (len < 0) {
1373 return len;
1374 }
1375 if (copy_from_user(buf, &user_buffer[i], len))
1376 return -EFAULT;
1377 buf[len] = 0;
1378 if (strcmp(buf, pkt_dev->src_min) != 0) {
1379 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1380 strncpy(pkt_dev->src_min, buf, len);
1381 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1382 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1383 }
1384 if (debug)
1385 printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1386 pkt_dev->src_min);
1387 i += len;
1388 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1389 return count;
1390 }
1391 if (!strcmp(name, "src_max")) {
1392 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1393 if (len < 0) {
1394 return len;
1395 }
1396 if (copy_from_user(buf, &user_buffer[i], len))
1397 return -EFAULT;
1398 buf[len] = 0;
1399 if (strcmp(buf, pkt_dev->src_max) != 0) {
1400 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1401 strncpy(pkt_dev->src_max, buf, len);
1402 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1403 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1404 }
1405 if (debug)
1406 printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1407 pkt_dev->src_max);
1408 i += len;
1409 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1410 return count;
1411 }
1412 if (!strcmp(name, "dst_mac")) {
1413 char *v = valstr;
1414 unsigned char old_dmac[ETH_ALEN];
1415 unsigned char *m = pkt_dev->dst_mac;
1416 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1417
1418 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1419 if (len < 0) {
1420 return len;
1421 }
1422 memset(valstr, 0, sizeof(valstr));
1423 if (copy_from_user(valstr, &user_buffer[i], len))
1424 return -EFAULT;
1425 i += len;
1426
1427 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1428 if (*v >= '0' && *v <= '9') {
1429 *m *= 16;
1430 *m += *v - '0';
1431 }
1432 if (*v >= 'A' && *v <= 'F') {
1433 *m *= 16;
1434 *m += *v - 'A' + 10;
1435 }
1436 if (*v >= 'a' && *v <= 'f') {
1437 *m *= 16;
1438 *m += *v - 'a' + 10;
1439 }
1440 if (*v == ':') {
1441 m++;
1442 *m = 0;
1443 }
1444 }
1445
1446 /* Set up Dest MAC */
1447 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1448 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1449
1450 sprintf(pg_result, "OK: dstmac");
1451 return count;
1452 }
1453 if (!strcmp(name, "src_mac")) {
1454 char *v = valstr;
1455 unsigned char *m = pkt_dev->src_mac;
1456
1457 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1458 if (len < 0) {
1459 return len;
1460 }
1461 memset(valstr, 0, sizeof(valstr));
1462 if (copy_from_user(valstr, &user_buffer[i], len))
1463 return -EFAULT;
1464 i += len;
1465
1466 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1467 if (*v >= '0' && *v <= '9') {
1468 *m *= 16;
1469 *m += *v - '0';
1470 }
1471 if (*v >= 'A' && *v <= 'F') {
1472 *m *= 16;
1473 *m += *v - 'A' + 10;
1474 }
1475 if (*v >= 'a' && *v <= 'f') {
1476 *m *= 16;
1477 *m += *v - 'a' + 10;
1478 }
1479 if (*v == ':') {
1480 m++;
1481 *m = 0;
1482 }
1483 }
1484
1485 sprintf(pg_result, "OK: srcmac");
1486 return count;
1487 }
1488
1489 if (!strcmp(name, "clear_counters")) {
1490 pktgen_clear_counters(pkt_dev);
1491 sprintf(pg_result, "OK: Clearing counters.\n");
1492 return count;
1493 }
1494
1495 if (!strcmp(name, "flows")) {
1496 len = num_arg(&user_buffer[i], 10, &value);
1497 if (len < 0) {
1498 return len;
1499 }
1500 i += len;
1501 if (value > MAX_CFLOWS)
1502 value = MAX_CFLOWS;
1503
1504 pkt_dev->cflows = value;
1505 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1506 return count;
1507 }
1508
1509 if (!strcmp(name, "flowlen")) {
1510 len = num_arg(&user_buffer[i], 10, &value);
1511 if (len < 0) {
1512 return len;
1513 }
1514 i += len;
1515 pkt_dev->lflow = value;
1516 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1517 return count;
1518 }
1519
1520 if (!strcmp(name, "mpls")) {
1521 unsigned n, offset;
1522 len = get_labels(&user_buffer[i], pkt_dev);
1523 if (len < 0) { return len; }
1524 i += len;
1525 offset = sprintf(pg_result, "OK: mpls=");
1526 for (n = 0; n < pkt_dev->nr_labels; n++)
1527 offset += sprintf(pg_result + offset,
1528 "%08x%s", ntohl(pkt_dev->labels[n]),
1529 n == pkt_dev->nr_labels-1 ? "" : ",");
1530
1531 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1532 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1533 pkt_dev->svlan_id = 0xffff;
1534
1535 if (debug)
1536 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1537 }
1538 return count;
1539 }
1540
1541 if (!strcmp(name, "vlan_id")) {
1542 len = num_arg(&user_buffer[i], 4, &value);
1543 if (len < 0) {
1544 return len;
1545 }
1546 i += len;
1547 if (value <= 4095) {
1548 pkt_dev->vlan_id = value; /* turn on VLAN */
1549
1550 if (debug)
1551 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1552
1553 if (debug && pkt_dev->nr_labels)
1554 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1555
1556 pkt_dev->nr_labels = 0; /* turn off MPLS */
1557 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1558 } else {
1559 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1560 pkt_dev->svlan_id = 0xffff;
1561
1562 if (debug)
1563 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1564 }
1565 return count;
1566 }
1567
1568 if (!strcmp(name, "vlan_p")) {
1569 len = num_arg(&user_buffer[i], 1, &value);
1570 if (len < 0) {
1571 return len;
1572 }
1573 i += len;
1574 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1575 pkt_dev->vlan_p = value;
1576 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1577 } else {
1578 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1579 }
1580 return count;
1581 }
1582
1583 if (!strcmp(name, "vlan_cfi")) {
1584 len = num_arg(&user_buffer[i], 1, &value);
1585 if (len < 0) {
1586 return len;
1587 }
1588 i += len;
1589 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1590 pkt_dev->vlan_cfi = value;
1591 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1592 } else {
1593 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1594 }
1595 return count;
1596 }
1597
1598 if (!strcmp(name, "svlan_id")) {
1599 len = num_arg(&user_buffer[i], 4, &value);
1600 if (len < 0) {
1601 return len;
1602 }
1603 i += len;
1604 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1605 pkt_dev->svlan_id = value; /* turn on SVLAN */
1606
1607 if (debug)
1608 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1609
1610 if (debug && pkt_dev->nr_labels)
1611 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1612
1613 pkt_dev->nr_labels = 0; /* turn off MPLS */
1614 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1615 } else {
1616 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1617 pkt_dev->svlan_id = 0xffff;
1618
1619 if (debug)
1620 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1621 }
1622 return count;
1623 }
1624
1625 if (!strcmp(name, "svlan_p")) {
1626 len = num_arg(&user_buffer[i], 1, &value);
1627 if (len < 0) {
1628 return len;
1629 }
1630 i += len;
1631 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1632 pkt_dev->svlan_p = value;
1633 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1634 } else {
1635 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1636 }
1637 return count;
1638 }
1639
1640 if (!strcmp(name, "svlan_cfi")) {
1641 len = num_arg(&user_buffer[i], 1, &value);
1642 if (len < 0) {
1643 return len;
1644 }
1645 i += len;
1646 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1647 pkt_dev->svlan_cfi = value;
1648 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1649 } else {
1650 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1651 }
1652 return count;
1653 }
1654
1655 if (!strcmp(name, "tos")) {
1656 __u32 tmp_value = 0;
1657 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1658 if (len < 0) {
1659 return len;
1660 }
1661 i += len;
1662 if (len == 2) {
1663 pkt_dev->tos = tmp_value;
1664 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1665 } else {
1666 sprintf(pg_result, "ERROR: tos must be 00-ff");
1667 }
1668 return count;
1669 }
1670
1671 if (!strcmp(name, "traffic_class")) {
1672 __u32 tmp_value = 0;
1673 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1674 if (len < 0) {
1675 return len;
1676 }
1677 i += len;
1678 if (len == 2) {
1679 pkt_dev->traffic_class = tmp_value;
1680 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1681 } else {
1682 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1683 }
1684 return count;
1685 }
1686
1687 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1688 return -EINVAL;
1689 }
1690
1691 static int pktgen_if_open(struct inode *inode, struct file *file)
1692 {
1693 return single_open(file, pktgen_if_show, PDE(inode)->data);
1694 }
1695
1696 static const struct file_operations pktgen_if_fops = {
1697 .owner = THIS_MODULE,
1698 .open = pktgen_if_open,
1699 .read = seq_read,
1700 .llseek = seq_lseek,
1701 .write = pktgen_if_write,
1702 .release = single_release,
1703 };
1704
1705 static int pktgen_thread_show(struct seq_file *seq, void *v)
1706 {
1707 struct pktgen_thread *t = seq->private;
1708 struct pktgen_dev *pkt_dev;
1709
1710 BUG_ON(!t);
1711
1712 seq_printf(seq, "Name: %s max_before_softirq: %d\n",
1713 t->tsk->comm, t->max_before_softirq);
1714
1715 seq_printf(seq, "Running: ");
1716
1717 if_lock(t);
1718 list_for_each_entry(pkt_dev, &t->if_list, list)
1719 if (pkt_dev->running)
1720 seq_printf(seq, "%s ", pkt_dev->odev->name);
1721
1722 seq_printf(seq, "\nStopped: ");
1723
1724 list_for_each_entry(pkt_dev, &t->if_list, list)
1725 if (!pkt_dev->running)
1726 seq_printf(seq, "%s ", pkt_dev->odev->name);
1727
1728 if (t->result[0])
1729 seq_printf(seq, "\nResult: %s\n", t->result);
1730 else
1731 seq_printf(seq, "\nResult: NA\n");
1732
1733 if_unlock(t);
1734
1735 return 0;
1736 }
1737
1738 static ssize_t pktgen_thread_write(struct file *file,
1739 const char __user * user_buffer,
1740 size_t count, loff_t * offset)
1741 {
1742 struct seq_file *seq = (struct seq_file *)file->private_data;
1743 struct pktgen_thread *t = seq->private;
1744 int i = 0, max, len, ret;
1745 char name[40];
1746 char *pg_result;
1747 unsigned long value = 0;
1748
1749 if (count < 1) {
1750 // sprintf(pg_result, "Wrong command format");
1751 return -EINVAL;
1752 }
1753
1754 max = count - i;
1755 len = count_trail_chars(&user_buffer[i], max);
1756 if (len < 0)
1757 return len;
1758
1759 i += len;
1760
1761 /* Read variable name */
1762
1763 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1764 if (len < 0)
1765 return len;
1766
1767 memset(name, 0, sizeof(name));
1768 if (copy_from_user(name, &user_buffer[i], len))
1769 return -EFAULT;
1770 i += len;
1771
1772 max = count - i;
1773 len = count_trail_chars(&user_buffer[i], max);
1774 if (len < 0)
1775 return len;
1776
1777 i += len;
1778
1779 if (debug)
1780 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1781 name, (unsigned long)count);
1782
1783 if (!t) {
1784 printk(KERN_ERR "pktgen: ERROR: No thread\n");
1785 ret = -EINVAL;
1786 goto out;
1787 }
1788
1789 pg_result = &(t->result[0]);
1790
1791 if (!strcmp(name, "add_device")) {
1792 char f[32];
1793 memset(f, 0, 32);
1794 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1795 if (len < 0) {
1796 ret = len;
1797 goto out;
1798 }
1799 if (copy_from_user(f, &user_buffer[i], len))
1800 return -EFAULT;
1801 i += len;
1802 mutex_lock(&pktgen_thread_lock);
1803 pktgen_add_device(t, f);
1804 mutex_unlock(&pktgen_thread_lock);
1805 ret = count;
1806 sprintf(pg_result, "OK: add_device=%s", f);
1807 goto out;
1808 }
1809
1810 if (!strcmp(name, "rem_device_all")) {
1811 mutex_lock(&pktgen_thread_lock);
1812 t->control |= T_REMDEVALL;
1813 mutex_unlock(&pktgen_thread_lock);
1814 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1815 ret = count;
1816 sprintf(pg_result, "OK: rem_device_all");
1817 goto out;
1818 }
1819
1820 if (!strcmp(name, "max_before_softirq")) {
1821 len = num_arg(&user_buffer[i], 10, &value);
1822 mutex_lock(&pktgen_thread_lock);
1823 t->max_before_softirq = value;
1824 mutex_unlock(&pktgen_thread_lock);
1825 ret = count;
1826 sprintf(pg_result, "OK: max_before_softirq=%lu", value);
1827 goto out;
1828 }
1829
1830 ret = -EINVAL;
1831 out:
1832 return ret;
1833 }
1834
1835 static int pktgen_thread_open(struct inode *inode, struct file *file)
1836 {
1837 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1838 }
1839
1840 static const struct file_operations pktgen_thread_fops = {
1841 .owner = THIS_MODULE,
1842 .open = pktgen_thread_open,
1843 .read = seq_read,
1844 .llseek = seq_lseek,
1845 .write = pktgen_thread_write,
1846 .release = single_release,
1847 };
1848
1849 /* Think find or remove for NN */
1850 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1851 {
1852 struct pktgen_thread *t;
1853 struct pktgen_dev *pkt_dev = NULL;
1854
1855 list_for_each_entry(t, &pktgen_threads, th_list) {
1856 pkt_dev = pktgen_find_dev(t, ifname);
1857 if (pkt_dev) {
1858 if (remove) {
1859 if_lock(t);
1860 pkt_dev->removal_mark = 1;
1861 t->control |= T_REMDEV;
1862 if_unlock(t);
1863 }
1864 break;
1865 }
1866 }
1867 return pkt_dev;
1868 }
1869
1870 /*
1871 * mark a device for removal
1872 */
1873 static void pktgen_mark_device(const char *ifname)
1874 {
1875 struct pktgen_dev *pkt_dev = NULL;
1876 const int max_tries = 10, msec_per_try = 125;
1877 int i = 0;
1878
1879 mutex_lock(&pktgen_thread_lock);
1880 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname);
1881
1882 while (1) {
1883
1884 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1885 if (pkt_dev == NULL)
1886 break; /* success */
1887
1888 mutex_unlock(&pktgen_thread_lock);
1889 pr_debug("pktgen: pktgen_mark_device waiting for %s "
1890 "to disappear....\n", ifname);
1891 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1892 mutex_lock(&pktgen_thread_lock);
1893
1894 if (++i >= max_tries) {
1895 printk(KERN_ERR "pktgen_mark_device: timed out after "
1896 "waiting %d msec for device %s to be removed\n",
1897 msec_per_try * i, ifname);
1898 break;
1899 }
1900
1901 }
1902
1903 mutex_unlock(&pktgen_thread_lock);
1904 }
1905
1906 static void pktgen_change_name(struct net_device *dev)
1907 {
1908 struct pktgen_thread *t;
1909
1910 list_for_each_entry(t, &pktgen_threads, th_list) {
1911 struct pktgen_dev *pkt_dev;
1912
1913 list_for_each_entry(pkt_dev, &t->if_list, list) {
1914 if (pkt_dev->odev != dev)
1915 continue;
1916
1917 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1918
1919 pkt_dev->entry = create_proc_entry(dev->name, 0600,
1920 pg_proc_dir);
1921 if (!pkt_dev->entry)
1922 printk(KERN_ERR "pktgen: can't move proc "
1923 " entry for '%s'\n", dev->name);
1924 break;
1925 }
1926 }
1927 }
1928
1929 static int pktgen_device_event(struct notifier_block *unused,
1930 unsigned long event, void *ptr)
1931 {
1932 struct net_device *dev = ptr;
1933
1934 /* It is OK that we do not hold the group lock right now,
1935 * as we run under the RTNL lock.
1936 */
1937
1938 switch (event) {
1939 case NETDEV_CHANGENAME:
1940 pktgen_change_name(dev);
1941 break;
1942
1943 case NETDEV_UNREGISTER:
1944 pktgen_mark_device(dev->name);
1945 break;
1946 }
1947
1948 return NOTIFY_DONE;
1949 }
1950
1951 /* Associate pktgen_dev with a device. */
1952
1953 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1954 {
1955 struct net_device *odev;
1956 int err;
1957
1958 /* Clean old setups */
1959 if (pkt_dev->odev) {
1960 dev_put(pkt_dev->odev);
1961 pkt_dev->odev = NULL;
1962 }
1963
1964 odev = dev_get_by_name(ifname);
1965 if (!odev) {
1966 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname);
1967 return -ENODEV;
1968 }
1969
1970 if (odev->type != ARPHRD_ETHER) {
1971 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname);
1972 err = -EINVAL;
1973 } else if (!netif_running(odev)) {
1974 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname);
1975 err = -ENETDOWN;
1976 } else {
1977 pkt_dev->odev = odev;
1978 return 0;
1979 }
1980
1981 dev_put(odev);
1982 return err;
1983 }
1984
1985 /* Read pkt_dev from the interface and set up internal pktgen_dev
1986 * structure to have the right information to create/send packets
1987 */
1988 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
1989 {
1990 if (!pkt_dev->odev) {
1991 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in "
1992 "setup_inject.\n");
1993 sprintf(pkt_dev->result,
1994 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1995 return;
1996 }
1997
1998 /* Default to the interface's mac if not explicitly set. */
1999
2000 if (is_zero_ether_addr(pkt_dev->src_mac))
2001 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2002
2003 /* Set up Dest MAC */
2004 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2005
2006 /* Set up pkt size */
2007 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2008
2009 if (pkt_dev->flags & F_IPV6) {
2010 /*
2011 * Skip this automatic address setting until locks or functions
2012 * gets exported
2013 */
2014
2015 #ifdef NOTNOW
2016 int i, set = 0, err = 1;
2017 struct inet6_dev *idev;
2018
2019 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2020 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2021 set = 1;
2022 break;
2023 }
2024
2025 if (!set) {
2026
2027 /*
2028 * Use linklevel address if unconfigured.
2029 *
2030 * use ipv6_get_lladdr if/when it's get exported
2031 */
2032
2033 rcu_read_lock();
2034 if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) {
2035 struct inet6_ifaddr *ifp;
2036
2037 read_lock_bh(&idev->lock);
2038 for (ifp = idev->addr_list; ifp;
2039 ifp = ifp->if_next) {
2040 if (ifp->scope == IFA_LINK
2041 && !(ifp->
2042 flags & IFA_F_TENTATIVE)) {
2043 ipv6_addr_copy(&pkt_dev->
2044 cur_in6_saddr,
2045 &ifp->addr);
2046 err = 0;
2047 break;
2048 }
2049 }
2050 read_unlock_bh(&idev->lock);
2051 }
2052 rcu_read_unlock();
2053 if (err)
2054 printk(KERN_ERR "pktgen: ERROR: IPv6 link "
2055 "address not availble.\n");
2056 }
2057 #endif
2058 } else {
2059 pkt_dev->saddr_min = 0;
2060 pkt_dev->saddr_max = 0;
2061 if (strlen(pkt_dev->src_min) == 0) {
2062
2063 struct in_device *in_dev;
2064
2065 rcu_read_lock();
2066 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2067 if (in_dev) {
2068 if (in_dev->ifa_list) {
2069 pkt_dev->saddr_min =
2070 in_dev->ifa_list->ifa_address;
2071 pkt_dev->saddr_max = pkt_dev->saddr_min;
2072 }
2073 }
2074 rcu_read_unlock();
2075 } else {
2076 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2077 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2078 }
2079
2080 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2081 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2082 }
2083 /* Initialize current values. */
2084 pkt_dev->cur_dst_mac_offset = 0;
2085 pkt_dev->cur_src_mac_offset = 0;
2086 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2087 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2088 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2089 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2090 pkt_dev->nflows = 0;
2091 }
2092
2093 static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us)
2094 {
2095 __u64 start;
2096 __u64 now;
2097
2098 start = now = getCurUs();
2099 printk(KERN_INFO "sleeping for %d\n", (int)(spin_until_us - now));
2100 while (now < spin_until_us) {
2101 /* TODO: optimize sleeping behavior */
2102 if (spin_until_us - now > jiffies_to_usecs(1) + 1)
2103 schedule_timeout_interruptible(1);
2104 else if (spin_until_us - now > 100) {
2105 do_softirq();
2106 if (!pkt_dev->running)
2107 return;
2108 if (need_resched())
2109 schedule();
2110 }
2111
2112 now = getCurUs();
2113 }
2114
2115 pkt_dev->idle_acc += now - start;
2116 }
2117
2118 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2119 {
2120 pkt_dev->pkt_overhead = 0;
2121 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2122 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2123 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2124 }
2125
2126 static inline int f_seen(struct pktgen_dev *pkt_dev, int flow)
2127 {
2128
2129 if (pkt_dev->flows[flow].flags & F_INIT)
2130 return 1;
2131 else
2132 return 0;
2133 }
2134
2135 static inline int f_pick(struct pktgen_dev *pkt_dev)
2136 {
2137 int flow = pkt_dev->curfl;
2138
2139 if (pkt_dev->flags & F_FLOW_SEQ) {
2140 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2141 /* reset time */
2142 pkt_dev->flows[flow].count = 0;
2143 pkt_dev->curfl += 1;
2144 if (pkt_dev->curfl >= pkt_dev->cflows)
2145 pkt_dev->curfl = 0; /*reset */
2146 }
2147 } else {
2148 flow = random32() % pkt_dev->cflows;
2149
2150 if (pkt_dev->flows[flow].count > pkt_dev->lflow)
2151 pkt_dev->flows[flow].count = 0;
2152 }
2153
2154 return pkt_dev->curfl;
2155 }
2156
2157
2158 #ifdef CONFIG_XFRM
2159 /* If there was already an IPSEC SA, we keep it as is, else
2160 * we go look for it ...
2161 */
2162 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2163 {
2164 struct xfrm_state *x = pkt_dev->flows[flow].x;
2165 if (!x) {
2166 /*slow path: we dont already have xfrm_state*/
2167 x = xfrm_stateonly_find((xfrm_address_t *)&pkt_dev->cur_daddr,
2168 (xfrm_address_t *)&pkt_dev->cur_saddr,
2169 AF_INET,
2170 pkt_dev->ipsmode,
2171 pkt_dev->ipsproto, 0);
2172 if (x) {
2173 pkt_dev->flows[flow].x = x;
2174 set_pkt_overhead(pkt_dev);
2175 pkt_dev->pkt_overhead+=x->props.header_len;
2176 }
2177
2178 }
2179 }
2180 #endif
2181 /* Increment/randomize headers according to flags and current values
2182 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2183 */
2184 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2185 {
2186 __u32 imn;
2187 __u32 imx;
2188 int flow = 0;
2189
2190 if (pkt_dev->cflows)
2191 flow = f_pick(pkt_dev);
2192
2193 /* Deal with source MAC */
2194 if (pkt_dev->src_mac_count > 1) {
2195 __u32 mc;
2196 __u32 tmp;
2197
2198 if (pkt_dev->flags & F_MACSRC_RND)
2199 mc = random32() % pkt_dev->src_mac_count;
2200 else {
2201 mc = pkt_dev->cur_src_mac_offset++;
2202 if (pkt_dev->cur_src_mac_offset >
2203 pkt_dev->src_mac_count)
2204 pkt_dev->cur_src_mac_offset = 0;
2205 }
2206
2207 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2208 pkt_dev->hh[11] = tmp;
2209 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2210 pkt_dev->hh[10] = tmp;
2211 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2212 pkt_dev->hh[9] = tmp;
2213 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2214 pkt_dev->hh[8] = tmp;
2215 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2216 pkt_dev->hh[7] = tmp;
2217 }
2218
2219 /* Deal with Destination MAC */
2220 if (pkt_dev->dst_mac_count > 1) {
2221 __u32 mc;
2222 __u32 tmp;
2223
2224 if (pkt_dev->flags & F_MACDST_RND)
2225 mc = random32() % pkt_dev->dst_mac_count;
2226
2227 else {
2228 mc = pkt_dev->cur_dst_mac_offset++;
2229 if (pkt_dev->cur_dst_mac_offset >
2230 pkt_dev->dst_mac_count) {
2231 pkt_dev->cur_dst_mac_offset = 0;
2232 }
2233 }
2234
2235 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2236 pkt_dev->hh[5] = tmp;
2237 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2238 pkt_dev->hh[4] = tmp;
2239 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2240 pkt_dev->hh[3] = tmp;
2241 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2242 pkt_dev->hh[2] = tmp;
2243 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2244 pkt_dev->hh[1] = tmp;
2245 }
2246
2247 if (pkt_dev->flags & F_MPLS_RND) {
2248 unsigned i;
2249 for (i = 0; i < pkt_dev->nr_labels; i++)
2250 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2251 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2252 ((__force __be32)random32() &
2253 htonl(0x000fffff));
2254 }
2255
2256 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2257 pkt_dev->vlan_id = random32() & (4096-1);
2258 }
2259
2260 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2261 pkt_dev->svlan_id = random32() & (4096 - 1);
2262 }
2263
2264 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2265 if (pkt_dev->flags & F_UDPSRC_RND)
2266 pkt_dev->cur_udp_src = random32() %
2267 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2268 + pkt_dev->udp_src_min;
2269
2270 else {
2271 pkt_dev->cur_udp_src++;
2272 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2273 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2274 }
2275 }
2276
2277 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2278 if (pkt_dev->flags & F_UDPDST_RND) {
2279 pkt_dev->cur_udp_dst = random32() %
2280 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2281 + pkt_dev->udp_dst_min;
2282 } else {
2283 pkt_dev->cur_udp_dst++;
2284 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2285 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2286 }
2287 }
2288
2289 if (!(pkt_dev->flags & F_IPV6)) {
2290
2291 if ((imn = ntohl(pkt_dev->saddr_min)) < (imx =
2292 ntohl(pkt_dev->
2293 saddr_max))) {
2294 __u32 t;
2295 if (pkt_dev->flags & F_IPSRC_RND)
2296 t = random32() % (imx - imn) + imn;
2297 else {
2298 t = ntohl(pkt_dev->cur_saddr);
2299 t++;
2300 if (t > imx) {
2301 t = imn;
2302 }
2303 }
2304 pkt_dev->cur_saddr = htonl(t);
2305 }
2306
2307 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2308 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2309 } else {
2310 imn = ntohl(pkt_dev->daddr_min);
2311 imx = ntohl(pkt_dev->daddr_max);
2312 if (imn < imx) {
2313 __u32 t;
2314 __be32 s;
2315 if (pkt_dev->flags & F_IPDST_RND) {
2316
2317 t = random32() % (imx - imn) + imn;
2318 s = htonl(t);
2319
2320 while (LOOPBACK(s) || MULTICAST(s)
2321 || BADCLASS(s) || ZERONET(s)
2322 || LOCAL_MCAST(s)) {
2323 t = random32() % (imx - imn) + imn;
2324 s = htonl(t);
2325 }
2326 pkt_dev->cur_daddr = s;
2327 } else {
2328 t = ntohl(pkt_dev->cur_daddr);
2329 t++;
2330 if (t > imx) {
2331 t = imn;
2332 }
2333 pkt_dev->cur_daddr = htonl(t);
2334 }
2335 }
2336 if (pkt_dev->cflows) {
2337 pkt_dev->flows[flow].flags |= F_INIT;
2338 pkt_dev->flows[flow].cur_daddr =
2339 pkt_dev->cur_daddr;
2340 #ifdef CONFIG_XFRM
2341 if (pkt_dev->flags & F_IPSEC_ON)
2342 get_ipsec_sa(pkt_dev, flow);
2343 #endif
2344 pkt_dev->nflows++;
2345 }
2346 }
2347 } else { /* IPV6 * */
2348
2349 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2350 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2351 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2352 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2353 else {
2354 int i;
2355
2356 /* Only random destinations yet */
2357
2358 for (i = 0; i < 4; i++) {
2359 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2360 (((__force __be32)random32() |
2361 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2362 pkt_dev->max_in6_daddr.s6_addr32[i]);
2363 }
2364 }
2365 }
2366
2367 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2368 __u32 t;
2369 if (pkt_dev->flags & F_TXSIZE_RND) {
2370 t = random32() %
2371 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2372 + pkt_dev->min_pkt_size;
2373 } else {
2374 t = pkt_dev->cur_pkt_size + 1;
2375 if (t > pkt_dev->max_pkt_size)
2376 t = pkt_dev->min_pkt_size;
2377 }
2378 pkt_dev->cur_pkt_size = t;
2379 }
2380
2381 pkt_dev->flows[flow].count++;
2382 }
2383
2384
2385 #ifdef CONFIG_XFRM
2386 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2387 {
2388 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2389 int err = 0;
2390 struct iphdr *iph;
2391
2392 if (!x)
2393 return 0;
2394 /* XXX: we dont support tunnel mode for now until
2395 * we resolve the dst issue */
2396 if (x->props.mode != XFRM_MODE_TRANSPORT)
2397 return 0;
2398
2399 spin_lock(&x->lock);
2400 iph = ip_hdr(skb);
2401
2402 err = x->mode->output(x, skb);
2403 if (err)
2404 goto error;
2405 err = x->type->output(x, skb);
2406 if (err)
2407 goto error;
2408
2409 x->curlft.bytes +=skb->len;
2410 x->curlft.packets++;
2411 spin_unlock(&x->lock);
2412
2413 error:
2414 spin_unlock(&x->lock);
2415 return err;
2416 }
2417
2418 static inline void free_SAs(struct pktgen_dev *pkt_dev)
2419 {
2420 if (pkt_dev->cflows) {
2421 /* let go of the SAs if we have them */
2422 int i = 0;
2423 for (; i < pkt_dev->nflows; i++){
2424 struct xfrm_state *x = pkt_dev->flows[i].x;
2425 if (x) {
2426 xfrm_state_put(x);
2427 pkt_dev->flows[i].x = NULL;
2428 }
2429 }
2430 }
2431 }
2432
2433 static inline int process_ipsec(struct pktgen_dev *pkt_dev,
2434 struct sk_buff *skb, __be16 protocol)
2435 {
2436 if (pkt_dev->flags & F_IPSEC_ON) {
2437 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2438 int nhead = 0;
2439 if (x) {
2440 int ret;
2441 __u8 *eth;
2442 nhead = x->props.header_len - skb_headroom(skb);
2443 if (nhead >0) {
2444 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2445 if (ret < 0) {
2446 printk(KERN_ERR "Error expanding "
2447 "ipsec packet %d\n",ret);
2448 return 0;
2449 }
2450 }
2451
2452 /* ipsec is not expecting ll header */
2453 skb_pull(skb, ETH_HLEN);
2454 ret = pktgen_output_ipsec(skb, pkt_dev);
2455 if (ret) {
2456 printk(KERN_ERR "Error creating ipsec "
2457 "packet %d\n",ret);
2458 kfree_skb(skb);
2459 return 0;
2460 }
2461 /* restore ll */
2462 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2463 memcpy(eth, pkt_dev->hh, 12);
2464 *(u16 *) & eth[12] = protocol;
2465 }
2466 }
2467 return 1;
2468 }
2469 #endif
2470
2471 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2472 {
2473 unsigned i;
2474 for (i = 0; i < pkt_dev->nr_labels; i++) {
2475 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2476 }
2477 mpls--;
2478 *mpls |= MPLS_STACK_BOTTOM;
2479 }
2480
2481 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2482 unsigned int prio)
2483 {
2484 return htons(id | (cfi << 12) | (prio << 13));
2485 }
2486
2487 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2488 struct pktgen_dev *pkt_dev)
2489 {
2490 struct sk_buff *skb = NULL;
2491 __u8 *eth;
2492 struct udphdr *udph;
2493 int datalen, iplen;
2494 struct iphdr *iph;
2495 struct pktgen_hdr *pgh = NULL;
2496 __be16 protocol = htons(ETH_P_IP);
2497 __be32 *mpls;
2498 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2499 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2500 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2501 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2502
2503
2504 if (pkt_dev->nr_labels)
2505 protocol = htons(ETH_P_MPLS_UC);
2506
2507 if (pkt_dev->vlan_id != 0xffff)
2508 protocol = htons(ETH_P_8021Q);
2509
2510 /* Update any of the values, used when we're incrementing various
2511 * fields.
2512 */
2513 mod_cur_headers(pkt_dev);
2514
2515 datalen = (odev->hard_header_len + 16) & ~0xf;
2516 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + datalen +
2517 pkt_dev->pkt_overhead, GFP_ATOMIC);
2518 if (!skb) {
2519 sprintf(pkt_dev->result, "No memory");
2520 return NULL;
2521 }
2522
2523 skb_reserve(skb, datalen);
2524
2525 /* Reserve for ethernet and IP header */
2526 eth = (__u8 *) skb_push(skb, 14);
2527 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2528 if (pkt_dev->nr_labels)
2529 mpls_push(mpls, pkt_dev);
2530
2531 if (pkt_dev->vlan_id != 0xffff) {
2532 if (pkt_dev->svlan_id != 0xffff) {
2533 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2534 *svlan_tci = build_tci(pkt_dev->svlan_id,
2535 pkt_dev->svlan_cfi,
2536 pkt_dev->svlan_p);
2537 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2538 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2539 }
2540 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2541 *vlan_tci = build_tci(pkt_dev->vlan_id,
2542 pkt_dev->vlan_cfi,
2543 pkt_dev->vlan_p);
2544 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2545 *vlan_encapsulated_proto = htons(ETH_P_IP);
2546 }
2547
2548 skb->network_header = skb->tail;
2549 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2550 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2551
2552 iph = ip_hdr(skb);
2553 udph = udp_hdr(skb);
2554
2555 memcpy(eth, pkt_dev->hh, 12);
2556 *(__be16 *) & eth[12] = protocol;
2557
2558 /* Eth + IPh + UDPh + mpls */
2559 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2560 pkt_dev->pkt_overhead;
2561 if (datalen < sizeof(struct pktgen_hdr))
2562 datalen = sizeof(struct pktgen_hdr);
2563
2564 udph->source = htons(pkt_dev->cur_udp_src);
2565 udph->dest = htons(pkt_dev->cur_udp_dst);
2566 udph->len = htons(datalen + 8); /* DATA + udphdr */
2567 udph->check = 0; /* No checksum */
2568
2569 iph->ihl = 5;
2570 iph->version = 4;
2571 iph->ttl = 32;
2572 iph->tos = pkt_dev->tos;
2573 iph->protocol = IPPROTO_UDP; /* UDP */
2574 iph->saddr = pkt_dev->cur_saddr;
2575 iph->daddr = pkt_dev->cur_daddr;
2576 iph->frag_off = 0;
2577 iplen = 20 + 8 + datalen;
2578 iph->tot_len = htons(iplen);
2579 iph->check = 0;
2580 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2581 skb->protocol = protocol;
2582 skb->mac_header = (skb->network_header - ETH_HLEN -
2583 pkt_dev->pkt_overhead);
2584 skb->dev = odev;
2585 skb->pkt_type = PACKET_HOST;
2586
2587 if (pkt_dev->nfrags <= 0)
2588 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2589 else {
2590 int frags = pkt_dev->nfrags;
2591 int i;
2592
2593 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2594
2595 if (frags > MAX_SKB_FRAGS)
2596 frags = MAX_SKB_FRAGS;
2597 if (datalen > frags * PAGE_SIZE) {
2598 skb_put(skb, datalen - frags * PAGE_SIZE);
2599 datalen = frags * PAGE_SIZE;
2600 }
2601
2602 i = 0;
2603 while (datalen > 0) {
2604 struct page *page = alloc_pages(GFP_KERNEL, 0);
2605 skb_shinfo(skb)->frags[i].page = page;
2606 skb_shinfo(skb)->frags[i].page_offset = 0;
2607 skb_shinfo(skb)->frags[i].size =
2608 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2609 datalen -= skb_shinfo(skb)->frags[i].size;
2610 skb->len += skb_shinfo(skb)->frags[i].size;
2611 skb->data_len += skb_shinfo(skb)->frags[i].size;
2612 i++;
2613 skb_shinfo(skb)->nr_frags = i;
2614 }
2615
2616 while (i < frags) {
2617 int rem;
2618
2619 if (i == 0)
2620 break;
2621
2622 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2623 if (rem == 0)
2624 break;
2625
2626 skb_shinfo(skb)->frags[i - 1].size -= rem;
2627
2628 skb_shinfo(skb)->frags[i] =
2629 skb_shinfo(skb)->frags[i - 1];
2630 get_page(skb_shinfo(skb)->frags[i].page);
2631 skb_shinfo(skb)->frags[i].page =
2632 skb_shinfo(skb)->frags[i - 1].page;
2633 skb_shinfo(skb)->frags[i].page_offset +=
2634 skb_shinfo(skb)->frags[i - 1].size;
2635 skb_shinfo(skb)->frags[i].size = rem;
2636 i++;
2637 skb_shinfo(skb)->nr_frags = i;
2638 }
2639 }
2640
2641 /* Stamp the time, and sequence number, convert them to network byte order */
2642
2643 if (pgh) {
2644 struct timeval timestamp;
2645
2646 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2647 pgh->seq_num = htonl(pkt_dev->seq_num);
2648
2649 do_gettimeofday(&timestamp);
2650 pgh->tv_sec = htonl(timestamp.tv_sec);
2651 pgh->tv_usec = htonl(timestamp.tv_usec);
2652 }
2653
2654 #ifdef CONFIG_XFRM
2655 if (!process_ipsec(pkt_dev, skb, protocol))
2656 return NULL;
2657 #endif
2658
2659 return skb;
2660 }
2661
2662 /*
2663 * scan_ip6, fmt_ip taken from dietlibc-0.21
2664 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2665 *
2666 * Slightly modified for kernel.
2667 * Should be candidate for net/ipv4/utils.c
2668 * --ro
2669 */
2670
2671 static unsigned int scan_ip6(const char *s, char ip[16])
2672 {
2673 unsigned int i;
2674 unsigned int len = 0;
2675 unsigned long u;
2676 char suffix[16];
2677 unsigned int prefixlen = 0;
2678 unsigned int suffixlen = 0;
2679 __be32 tmp;
2680
2681 for (i = 0; i < 16; i++)
2682 ip[i] = 0;
2683
2684 for (;;) {
2685 if (*s == ':') {
2686 len++;
2687 if (s[1] == ':') { /* Found "::", skip to part 2 */
2688 s += 2;
2689 len++;
2690 break;
2691 }
2692 s++;
2693 }
2694 {
2695 char *tmp;
2696 u = simple_strtoul(s, &tmp, 16);
2697 i = tmp - s;
2698 }
2699
2700 if (!i)
2701 return 0;
2702 if (prefixlen == 12 && s[i] == '.') {
2703
2704 /* the last 4 bytes may be written as IPv4 address */
2705
2706 tmp = in_aton(s);
2707 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2708 return i + len;
2709 }
2710 ip[prefixlen++] = (u >> 8);
2711 ip[prefixlen++] = (u & 255);
2712 s += i;
2713 len += i;
2714 if (prefixlen == 16)
2715 return len;
2716 }
2717
2718 /* part 2, after "::" */
2719 for (;;) {
2720 if (*s == ':') {
2721 if (suffixlen == 0)
2722 break;
2723 s++;
2724 len++;
2725 } else if (suffixlen != 0)
2726 break;
2727 {
2728 char *tmp;
2729 u = simple_strtol(s, &tmp, 16);
2730 i = tmp - s;
2731 }
2732 if (!i) {
2733 if (*s)
2734 len--;
2735 break;
2736 }
2737 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2738 tmp = in_aton(s);
2739 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2740 sizeof(tmp));
2741 suffixlen += 4;
2742 len += strlen(s);
2743 break;
2744 }
2745 suffix[suffixlen++] = (u >> 8);
2746 suffix[suffixlen++] = (u & 255);
2747 s += i;
2748 len += i;
2749 if (prefixlen + suffixlen == 16)
2750 break;
2751 }
2752 for (i = 0; i < suffixlen; i++)
2753 ip[16 - suffixlen + i] = suffix[i];
2754 return len;
2755 }
2756
2757 static char tohex(char hexdigit)
2758 {
2759 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2760 }
2761
2762 static int fmt_xlong(char *s, unsigned int i)
2763 {
2764 char *bak = s;
2765 *s = tohex((i >> 12) & 0xf);
2766 if (s != bak || *s != '0')
2767 ++s;
2768 *s = tohex((i >> 8) & 0xf);
2769 if (s != bak || *s != '0')
2770 ++s;
2771 *s = tohex((i >> 4) & 0xf);
2772 if (s != bak || *s != '0')
2773 ++s;
2774 *s = tohex(i & 0xf);
2775 return s - bak + 1;
2776 }
2777
2778 static unsigned int fmt_ip6(char *s, const char ip[16])
2779 {
2780 unsigned int len;
2781 unsigned int i;
2782 unsigned int temp;
2783 unsigned int compressing;
2784 int j;
2785
2786 len = 0;
2787 compressing = 0;
2788 for (j = 0; j < 16; j += 2) {
2789
2790 #ifdef V4MAPPEDPREFIX
2791 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2792 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2793 temp = strlen(s);
2794 return len + temp;
2795 }
2796 #endif
2797 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2798 (unsigned long)(unsigned char)ip[j + 1];
2799 if (temp == 0) {
2800 if (!compressing) {
2801 compressing = 1;
2802 if (j == 0) {
2803 *s++ = ':';
2804 ++len;
2805 }
2806 }
2807 } else {
2808 if (compressing) {
2809 compressing = 0;
2810 *s++ = ':';
2811 ++len;
2812 }
2813 i = fmt_xlong(s, temp);
2814 len += i;
2815 s += i;
2816 if (j < 14) {
2817 *s++ = ':';
2818 ++len;
2819 }
2820 }
2821 }
2822 if (compressing) {
2823 *s++ = ':';
2824 ++len;
2825 }
2826 *s = 0;
2827 return len;
2828 }
2829
2830 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2831 struct pktgen_dev *pkt_dev)
2832 {
2833 struct sk_buff *skb = NULL;
2834 __u8 *eth;
2835 struct udphdr *udph;
2836 int datalen;
2837 struct ipv6hdr *iph;
2838 struct pktgen_hdr *pgh = NULL;
2839 __be16 protocol = htons(ETH_P_IPV6);
2840 __be32 *mpls;
2841 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2842 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2843 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2844 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2845
2846 if (pkt_dev->nr_labels)
2847 protocol = htons(ETH_P_MPLS_UC);
2848
2849 if (pkt_dev->vlan_id != 0xffff)
2850 protocol = htons(ETH_P_8021Q);
2851
2852 /* Update any of the values, used when we're incrementing various
2853 * fields.
2854 */
2855 mod_cur_headers(pkt_dev);
2856
2857 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16 +
2858 pkt_dev->pkt_overhead, GFP_ATOMIC);
2859 if (!skb) {
2860 sprintf(pkt_dev->result, "No memory");
2861 return NULL;
2862 }
2863
2864 skb_reserve(skb, 16);
2865
2866 /* Reserve for ethernet and IP header */
2867 eth = (__u8 *) skb_push(skb, 14);
2868 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2869 if (pkt_dev->nr_labels)
2870 mpls_push(mpls, pkt_dev);
2871
2872 if (pkt_dev->vlan_id != 0xffff) {
2873 if (pkt_dev->svlan_id != 0xffff) {
2874 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2875 *svlan_tci = build_tci(pkt_dev->svlan_id,
2876 pkt_dev->svlan_cfi,
2877 pkt_dev->svlan_p);
2878 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2879 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2880 }
2881 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2882 *vlan_tci = build_tci(pkt_dev->vlan_id,
2883 pkt_dev->vlan_cfi,
2884 pkt_dev->vlan_p);
2885 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2886 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2887 }
2888
2889 skb->network_header = skb->tail;
2890 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2891 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2892
2893 iph = ipv6_hdr(skb);
2894 udph = udp_hdr(skb);
2895
2896 memcpy(eth, pkt_dev->hh, 12);
2897 *(__be16 *) & eth[12] = protocol;
2898
2899 /* Eth + IPh + UDPh + mpls */
2900 datalen = pkt_dev->cur_pkt_size - 14 -
2901 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2902 pkt_dev->pkt_overhead;
2903
2904 if (datalen < sizeof(struct pktgen_hdr)) {
2905 datalen = sizeof(struct pktgen_hdr);
2906 if (net_ratelimit())
2907 printk(KERN_INFO "pktgen: increased datalen to %d\n",
2908 datalen);
2909 }
2910
2911 udph->source = htons(pkt_dev->cur_udp_src);
2912 udph->dest = htons(pkt_dev->cur_udp_dst);
2913 udph->len = htons(datalen + sizeof(struct udphdr));
2914 udph->check = 0; /* No checksum */
2915
2916 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2917
2918 if (pkt_dev->traffic_class) {
2919 /* Version + traffic class + flow (0) */
2920 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2921 }
2922
2923 iph->hop_limit = 32;
2924
2925 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2926 iph->nexthdr = IPPROTO_UDP;
2927
2928 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2929 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2930
2931 skb->mac_header = (skb->network_header - ETH_HLEN -
2932 pkt_dev->pkt_overhead);
2933 skb->protocol = protocol;
2934 skb->dev = odev;
2935 skb->pkt_type = PACKET_HOST;
2936
2937 if (pkt_dev->nfrags <= 0)
2938 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2939 else {
2940 int frags = pkt_dev->nfrags;
2941 int i;
2942
2943 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2944
2945 if (frags > MAX_SKB_FRAGS)
2946 frags = MAX_SKB_FRAGS;
2947 if (datalen > frags * PAGE_SIZE) {
2948 skb_put(skb, datalen - frags * PAGE_SIZE);
2949 datalen = frags * PAGE_SIZE;
2950 }
2951
2952 i = 0;
2953 while (datalen > 0) {
2954 struct page *page = alloc_pages(GFP_KERNEL, 0);
2955 skb_shinfo(skb)->frags[i].page = page;
2956 skb_shinfo(skb)->frags[i].page_offset = 0;
2957 skb_shinfo(skb)->frags[i].size =
2958 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2959 datalen -= skb_shinfo(skb)->frags[i].size;
2960 skb->len += skb_shinfo(skb)->frags[i].size;
2961 skb->data_len += skb_shinfo(skb)->frags[i].size;
2962 i++;
2963 skb_shinfo(skb)->nr_frags = i;
2964 }
2965
2966 while (i < frags) {
2967 int rem;
2968
2969 if (i == 0)
2970 break;
2971
2972 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2973 if (rem == 0)
2974 break;
2975
2976 skb_shinfo(skb)->frags[i - 1].size -= rem;
2977
2978 skb_shinfo(skb)->frags[i] =
2979 skb_shinfo(skb)->frags[i - 1];
2980 get_page(skb_shinfo(skb)->frags[i].page);
2981 skb_shinfo(skb)->frags[i].page =
2982 skb_shinfo(skb)->frags[i - 1].page;
2983 skb_shinfo(skb)->frags[i].page_offset +=
2984 skb_shinfo(skb)->frags[i - 1].size;
2985 skb_shinfo(skb)->frags[i].size = rem;
2986 i++;
2987 skb_shinfo(skb)->nr_frags = i;
2988 }
2989 }
2990
2991 /* Stamp the time, and sequence number, convert them to network byte order */
2992 /* should we update cloned packets too ? */
2993 if (pgh) {
2994 struct timeval timestamp;
2995
2996 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2997 pgh->seq_num = htonl(pkt_dev->seq_num);
2998
2999 do_gettimeofday(&timestamp);
3000 pgh->tv_sec = htonl(timestamp.tv_sec);
3001 pgh->tv_usec = htonl(timestamp.tv_usec);
3002 }
3003 /* pkt_dev->seq_num++; FF: you really mean this? */
3004
3005 return skb;
3006 }
3007
3008 static inline struct sk_buff *fill_packet(struct net_device *odev,
3009 struct pktgen_dev *pkt_dev)
3010 {
3011 if (pkt_dev->flags & F_IPV6)
3012 return fill_packet_ipv6(odev, pkt_dev);
3013 else
3014 return fill_packet_ipv4(odev, pkt_dev);
3015 }
3016
3017 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3018 {
3019 pkt_dev->seq_num = 1;
3020 pkt_dev->idle_acc = 0;
3021 pkt_dev->sofar = 0;
3022 pkt_dev->tx_bytes = 0;
3023 pkt_dev->errors = 0;
3024 }
3025
3026 /* Set up structure for sending pkts, clear counters */
3027
3028 static void pktgen_run(struct pktgen_thread *t)
3029 {
3030 struct pktgen_dev *pkt_dev;
3031 int started = 0;
3032
3033 pr_debug("pktgen: entering pktgen_run. %p\n", t);
3034
3035 if_lock(t);
3036 list_for_each_entry(pkt_dev, &t->if_list, list) {
3037
3038 /*
3039 * setup odev and create initial packet.
3040 */
3041 pktgen_setup_inject(pkt_dev);
3042
3043 if (pkt_dev->odev) {
3044 pktgen_clear_counters(pkt_dev);
3045 pkt_dev->running = 1; /* Cranke yeself! */
3046 pkt_dev->skb = NULL;
3047 pkt_dev->started_at = getCurUs();
3048 pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */
3049 pkt_dev->next_tx_ns = 0;
3050 set_pkt_overhead(pkt_dev);
3051
3052 strcpy(pkt_dev->result, "Starting");
3053 started++;
3054 } else
3055 strcpy(pkt_dev->result, "Error starting");
3056 }
3057 if_unlock(t);
3058 if (started)
3059 t->control &= ~(T_STOP);
3060 }
3061
3062 static void pktgen_stop_all_threads_ifs(void)
3063 {
3064 struct pktgen_thread *t;
3065
3066 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n");
3067
3068 mutex_lock(&pktgen_thread_lock);
3069
3070 list_for_each_entry(t, &pktgen_threads, th_list)
3071 t->control |= T_STOP;
3072
3073 mutex_unlock(&pktgen_thread_lock);
3074 }
3075
3076 static int thread_is_running(struct pktgen_thread *t)
3077 {
3078 struct pktgen_dev *pkt_dev;
3079 int res = 0;
3080
3081 list_for_each_entry(pkt_dev, &t->if_list, list)
3082 if (pkt_dev->running) {
3083 res = 1;
3084 break;
3085 }
3086 return res;
3087 }
3088
3089 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3090 {
3091 if_lock(t);
3092
3093 while (thread_is_running(t)) {
3094
3095 if_unlock(t);
3096
3097 msleep_interruptible(100);
3098
3099 if (signal_pending(current))
3100 goto signal;
3101 if_lock(t);
3102 }
3103 if_unlock(t);
3104 return 1;
3105 signal:
3106 return 0;
3107 }
3108
3109 static int pktgen_wait_all_threads_run(void)
3110 {
3111 struct pktgen_thread *t;
3112 int sig = 1;
3113
3114 mutex_lock(&pktgen_thread_lock);
3115
3116 list_for_each_entry(t, &pktgen_threads, th_list) {
3117 sig = pktgen_wait_thread_run(t);
3118 if (sig == 0)
3119 break;
3120 }
3121
3122 if (sig == 0)
3123 list_for_each_entry(t, &pktgen_threads, th_list)
3124 t->control |= (T_STOP);
3125
3126 mutex_unlock(&pktgen_thread_lock);
3127 return sig;
3128 }
3129
3130 static void pktgen_run_all_threads(void)
3131 {
3132 struct pktgen_thread *t;
3133
3134 pr_debug("pktgen: entering pktgen_run_all_threads.\n");
3135
3136 mutex_lock(&pktgen_thread_lock);
3137
3138 list_for_each_entry(t, &pktgen_threads, th_list)
3139 t->control |= (T_RUN);
3140
3141 mutex_unlock(&pktgen_thread_lock);
3142
3143 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
3144
3145 pktgen_wait_all_threads_run();
3146 }
3147
3148 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3149 {
3150 __u64 total_us, bps, mbps, pps, idle;
3151 char *p = pkt_dev->result;
3152
3153 total_us = pkt_dev->stopped_at - pkt_dev->started_at;
3154
3155 idle = pkt_dev->idle_acc;
3156
3157 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3158 (unsigned long long)total_us,
3159 (unsigned long long)(total_us - idle),
3160 (unsigned long long)idle,
3161 (unsigned long long)pkt_dev->sofar,
3162 pkt_dev->cur_pkt_size, nr_frags);
3163
3164 pps = pkt_dev->sofar * USEC_PER_SEC;
3165
3166 while ((total_us >> 32) != 0) {
3167 pps >>= 1;
3168 total_us >>= 1;
3169 }
3170
3171 do_div(pps, total_us);
3172
3173 bps = pps * 8 * pkt_dev->cur_pkt_size;
3174
3175 mbps = bps;
3176 do_div(mbps, 1000000);
3177 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3178 (unsigned long long)pps,
3179 (unsigned long long)mbps,
3180 (unsigned long long)bps,
3181 (unsigned long long)pkt_dev->errors);
3182 }
3183
3184 /* Set stopped-at timer, remove from running list, do counters & statistics */
3185
3186 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3187 {
3188 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3189
3190 if (!pkt_dev->running) {
3191 printk(KERN_WARNING "pktgen: interface: %s is already "
3192 "stopped\n", pkt_dev->odev->name);
3193 return -EINVAL;
3194 }
3195
3196 pkt_dev->stopped_at = getCurUs();
3197 pkt_dev->running = 0;
3198
3199 show_results(pkt_dev, nr_frags);
3200
3201 return 0;
3202 }
3203
3204 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3205 {
3206 struct pktgen_dev *pkt_dev, *best = NULL;
3207
3208 if_lock(t);
3209
3210 list_for_each_entry(pkt_dev, &t->if_list, list) {
3211 if (!pkt_dev->running)
3212 continue;
3213 if (best == NULL)
3214 best = pkt_dev;
3215 else if (pkt_dev->next_tx_us < best->next_tx_us)
3216 best = pkt_dev;
3217 }
3218 if_unlock(t);
3219 return best;
3220 }
3221
3222 static void pktgen_stop(struct pktgen_thread *t)
3223 {
3224 struct pktgen_dev *pkt_dev;
3225
3226 pr_debug("pktgen: entering pktgen_stop\n");
3227
3228 if_lock(t);
3229
3230 list_for_each_entry(pkt_dev, &t->if_list, list) {
3231 pktgen_stop_device(pkt_dev);
3232 if (pkt_dev->skb)
3233 kfree_skb(pkt_dev->skb);
3234
3235 pkt_dev->skb = NULL;
3236 }
3237
3238 if_unlock(t);
3239 }
3240
3241 /*
3242 * one of our devices needs to be removed - find it
3243 * and remove it
3244 */
3245 static void pktgen_rem_one_if(struct pktgen_thread *t)
3246 {
3247 struct list_head *q, *n;
3248 struct pktgen_dev *cur;
3249
3250 pr_debug("pktgen: entering pktgen_rem_one_if\n");
3251
3252 if_lock(t);
3253
3254 list_for_each_safe(q, n, &t->if_list) {
3255 cur = list_entry(q, struct pktgen_dev, list);
3256
3257 if (!cur->removal_mark)
3258 continue;
3259
3260 if (cur->skb)
3261 kfree_skb(cur->skb);
3262 cur->skb = NULL;
3263
3264 pktgen_remove_device(t, cur);
3265
3266 break;
3267 }
3268
3269 if_unlock(t);
3270 }
3271
3272 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3273 {
3274 struct list_head *q, *n;
3275 struct pktgen_dev *cur;
3276
3277 /* Remove all devices, free mem */
3278
3279 pr_debug("pktgen: entering pktgen_rem_all_ifs\n");
3280 if_lock(t);
3281
3282 list_for_each_safe(q, n, &t->if_list) {
3283 cur = list_entry(q, struct pktgen_dev, list);
3284
3285 if (cur->skb)
3286 kfree_skb(cur->skb);
3287 cur->skb = NULL;
3288
3289 pktgen_remove_device(t, cur);
3290 }
3291
3292 if_unlock(t);
3293 }
3294
3295 static void pktgen_rem_thread(struct pktgen_thread *t)
3296 {
3297 /* Remove from the thread list */
3298
3299 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3300
3301 mutex_lock(&pktgen_thread_lock);
3302
3303 list_del(&t->th_list);
3304
3305 mutex_unlock(&pktgen_thread_lock);
3306 }
3307
3308 static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
3309 {
3310 struct net_device *odev = NULL;
3311 __u64 idle_start = 0;
3312 int ret;
3313
3314 odev = pkt_dev->odev;
3315
3316 if (pkt_dev->delay_us || pkt_dev->delay_ns) {
3317 u64 now;
3318
3319 now = getCurUs();
3320 if (now < pkt_dev->next_tx_us)
3321 spin(pkt_dev, pkt_dev->next_tx_us);
3322
3323 /* This is max DELAY, this has special meaning of
3324 * "never transmit"
3325 */
3326 if (pkt_dev->delay_us == 0x7FFFFFFF) {
3327 pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us;
3328 pkt_dev->next_tx_ns = pkt_dev->delay_ns;
3329 goto out;
3330 }
3331 }
3332
3333 if ((netif_queue_stopped(odev) ||
3334 netif_subqueue_stopped(odev, pkt_dev->skb->queue_mapping)) ||
3335 need_resched()) {
3336 idle_start = getCurUs();
3337
3338 if (!netif_running(odev)) {
3339 pktgen_stop_device(pkt_dev);
3340 if (pkt_dev->skb)
3341 kfree_skb(pkt_dev->skb);
3342 pkt_dev->skb = NULL;
3343 goto out;
3344 }
3345 if (need_resched())
3346 schedule();
3347
3348 pkt_dev->idle_acc += getCurUs() - idle_start;
3349
3350 if (netif_queue_stopped(odev) ||
3351 netif_subqueue_stopped(odev, pkt_dev->skb->queue_mapping)) {
3352 pkt_dev->next_tx_us = getCurUs(); /* TODO */
3353 pkt_dev->next_tx_ns = 0;
3354 goto out; /* Try the next interface */
3355 }
3356 }
3357
3358 if (pkt_dev->last_ok || !pkt_dev->skb) {
3359 if ((++pkt_dev->clone_count >= pkt_dev->clone_skb)
3360 || (!pkt_dev->skb)) {
3361 /* build a new pkt */
3362 if (pkt_dev->skb)
3363 kfree_skb(pkt_dev->skb);
3364
3365 pkt_dev->skb = fill_packet(odev, pkt_dev);
3366 if (pkt_dev->skb == NULL) {
3367 printk(KERN_ERR "pktgen: ERROR: couldn't "
3368 "allocate skb in fill_packet.\n");
3369 schedule();
3370 pkt_dev->clone_count--; /* back out increment, OOM */
3371 goto out;
3372 }
3373 pkt_dev->allocated_skbs++;
3374 pkt_dev->clone_count = 0; /* reset counter */
3375 }
3376 }
3377
3378 netif_tx_lock_bh(odev);
3379 if (!netif_queue_stopped(odev) &&
3380 !netif_subqueue_stopped(odev, pkt_dev->skb->queue_mapping)) {
3381
3382 atomic_inc(&(pkt_dev->skb->users));
3383 retry_now:
3384 ret = odev->hard_start_xmit(pkt_dev->skb, odev);
3385 if (likely(ret == NETDEV_TX_OK)) {
3386 pkt_dev->last_ok = 1;
3387 pkt_dev->sofar++;
3388 pkt_dev->seq_num++;
3389 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size;
3390
3391 } else if (ret == NETDEV_TX_LOCKED
3392 && (odev->features & NETIF_F_LLTX)) {
3393 cpu_relax();
3394 goto retry_now;
3395 } else { /* Retry it next time */
3396
3397 atomic_dec(&(pkt_dev->skb->users));
3398
3399 if (debug && net_ratelimit())
3400 printk(KERN_INFO "pktgen: Hard xmit error\n");
3401
3402 pkt_dev->errors++;
3403 pkt_dev->last_ok = 0;
3404 }
3405
3406 pkt_dev->next_tx_us = getCurUs();
3407 pkt_dev->next_tx_ns = 0;
3408
3409 pkt_dev->next_tx_us += pkt_dev->delay_us;
3410 pkt_dev->next_tx_ns += pkt_dev->delay_ns;
3411
3412 if (pkt_dev->next_tx_ns > 1000) {
3413 pkt_dev->next_tx_us++;
3414 pkt_dev->next_tx_ns -= 1000;
3415 }
3416 }
3417
3418 else { /* Retry it next time */
3419 pkt_dev->last_ok = 0;
3420 pkt_dev->next_tx_us = getCurUs(); /* TODO */
3421 pkt_dev->next_tx_ns = 0;
3422 }
3423
3424 netif_tx_unlock_bh(odev);
3425
3426 /* If pkt_dev->count is zero, then run forever */
3427 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3428 if (atomic_read(&(pkt_dev->skb->users)) != 1) {
3429 idle_start = getCurUs();
3430 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3431 if (signal_pending(current)) {
3432 break;
3433 }
3434 schedule();
3435 }
3436 pkt_dev->idle_acc += getCurUs() - idle_start;
3437 }
3438
3439 /* Done with this */
3440 pktgen_stop_device(pkt_dev);
3441 if (pkt_dev->skb)
3442 kfree_skb(pkt_dev->skb);
3443 pkt_dev->skb = NULL;
3444 }
3445 out:;
3446 }
3447
3448 /*
3449 * Main loop of the thread goes here
3450 */
3451
3452 static int pktgen_thread_worker(void *arg)
3453 {
3454 DEFINE_WAIT(wait);
3455 struct pktgen_thread *t = arg;
3456 struct pktgen_dev *pkt_dev = NULL;
3457 int cpu = t->cpu;
3458 u32 max_before_softirq;
3459 u32 tx_since_softirq = 0;
3460
3461 BUG_ON(smp_processor_id() != cpu);
3462
3463 init_waitqueue_head(&t->queue);
3464
3465 t->pid = current->pid;
3466
3467 pr_debug("pktgen: starting pktgen/%d: pid=%d\n", cpu, current->pid);
3468
3469 max_before_softirq = t->max_before_softirq;
3470
3471 set_current_state(TASK_INTERRUPTIBLE);
3472
3473 set_freezable();
3474
3475 while (!kthread_should_stop()) {
3476 pkt_dev = next_to_run(t);
3477
3478 if (!pkt_dev &&
3479 (t->control & (T_STOP | T_RUN | T_REMDEVALL | T_REMDEV))
3480 == 0) {
3481 prepare_to_wait(&(t->queue), &wait,
3482 TASK_INTERRUPTIBLE);
3483 schedule_timeout(HZ / 10);
3484 finish_wait(&(t->queue), &wait);
3485 }
3486
3487 __set_current_state(TASK_RUNNING);
3488
3489 if (pkt_dev) {
3490
3491 pktgen_xmit(pkt_dev);
3492
3493 /*
3494 * We like to stay RUNNING but must also give
3495 * others fair share.
3496 */
3497
3498 tx_since_softirq += pkt_dev->last_ok;
3499
3500 if (tx_since_softirq > max_before_softirq) {
3501 if (local_softirq_pending())
3502 do_softirq();
3503 tx_since_softirq = 0;
3504 }
3505 }
3506
3507 if (t->control & T_STOP) {
3508 pktgen_stop(t);
3509 t->control &= ~(T_STOP);
3510 }
3511
3512 if (t->control & T_RUN) {
3513 pktgen_run(t);
3514 t->control &= ~(T_RUN);
3515 }
3516
3517 if (t->control & T_REMDEVALL) {
3518 pktgen_rem_all_ifs(t);
3519 t->control &= ~(T_REMDEVALL);
3520 }
3521
3522 if (t->control & T_REMDEV) {
3523 pktgen_rem_one_if(t);
3524 t->control &= ~(T_REMDEV);
3525 }
3526
3527 try_to_freeze();
3528
3529 set_current_state(TASK_INTERRUPTIBLE);
3530 }
3531
3532 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm);
3533 pktgen_stop(t);
3534
3535 pr_debug("pktgen: %s removing all device\n", t->tsk->comm);
3536 pktgen_rem_all_ifs(t);
3537
3538 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm);
3539 pktgen_rem_thread(t);
3540
3541 return 0;
3542 }
3543
3544 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3545 const char *ifname)
3546 {
3547 struct pktgen_dev *p, *pkt_dev = NULL;
3548 if_lock(t);
3549
3550 list_for_each_entry(p, &t->if_list, list)
3551 if (strncmp(p->odev->name, ifname, IFNAMSIZ) == 0) {
3552 pkt_dev = p;
3553 break;
3554 }
3555
3556 if_unlock(t);
3557 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev);
3558 return pkt_dev;
3559 }
3560
3561 /*
3562 * Adds a dev at front of if_list.
3563 */
3564
3565 static int add_dev_to_thread(struct pktgen_thread *t,
3566 struct pktgen_dev *pkt_dev)
3567 {
3568 int rv = 0;
3569
3570 if_lock(t);
3571
3572 if (pkt_dev->pg_thread) {
3573 printk(KERN_ERR "pktgen: ERROR: already assigned "
3574 "to a thread.\n");
3575 rv = -EBUSY;
3576 goto out;
3577 }
3578
3579 list_add(&pkt_dev->list, &t->if_list);
3580 pkt_dev->pg_thread = t;
3581 pkt_dev->running = 0;
3582
3583 out:
3584 if_unlock(t);
3585 return rv;
3586 }
3587
3588 /* Called under thread lock */
3589
3590 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3591 {
3592 struct pktgen_dev *pkt_dev;
3593 int err;
3594
3595 /* We don't allow a device to be on several threads */
3596
3597 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3598 if (pkt_dev) {
3599 printk(KERN_ERR "pktgen: ERROR: interface already used.\n");
3600 return -EBUSY;
3601 }
3602
3603 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
3604 if (!pkt_dev)
3605 return -ENOMEM;
3606
3607 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state));
3608 if (pkt_dev->flows == NULL) {
3609 kfree(pkt_dev);
3610 return -ENOMEM;
3611 }
3612 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3613
3614 pkt_dev->removal_mark = 0;
3615 pkt_dev->min_pkt_size = ETH_ZLEN;
3616 pkt_dev->max_pkt_size = ETH_ZLEN;
3617 pkt_dev->nfrags = 0;
3618 pkt_dev->clone_skb = pg_clone_skb_d;
3619 pkt_dev->delay_us = pg_delay_d / 1000;
3620 pkt_dev->delay_ns = pg_delay_d % 1000;
3621 pkt_dev->count = pg_count_d;
3622 pkt_dev->sofar = 0;
3623 pkt_dev->udp_src_min = 9; /* sink port */
3624 pkt_dev->udp_src_max = 9;
3625 pkt_dev->udp_dst_min = 9;
3626 pkt_dev->udp_dst_max = 9;
3627
3628 pkt_dev->vlan_p = 0;
3629 pkt_dev->vlan_cfi = 0;
3630 pkt_dev->vlan_id = 0xffff;
3631 pkt_dev->svlan_p = 0;
3632 pkt_dev->svlan_cfi = 0;
3633 pkt_dev->svlan_id = 0xffff;
3634
3635 err = pktgen_setup_dev(pkt_dev, ifname);
3636 if (err)
3637 goto out1;
3638
3639 pkt_dev->entry = create_proc_entry(ifname, 0600, pg_proc_dir);
3640 if (!pkt_dev->entry) {
3641 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3642 PG_PROC_DIR, ifname);
3643 err = -EINVAL;
3644 goto out2;
3645 }
3646 pkt_dev->entry->proc_fops = &pktgen_if_fops;
3647 pkt_dev->entry->data = pkt_dev;
3648 #ifdef CONFIG_XFRM
3649 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3650 pkt_dev->ipsproto = IPPROTO_ESP;
3651 #endif
3652
3653 return add_dev_to_thread(t, pkt_dev);
3654 out2:
3655 dev_put(pkt_dev->odev);
3656 out1:
3657 #ifdef CONFIG_XFRM
3658 free_SAs(pkt_dev);
3659 #endif
3660 if (pkt_dev->flows)
3661 vfree(pkt_dev->flows);
3662 kfree(pkt_dev);
3663 return err;
3664 }
3665
3666 static int __init pktgen_create_thread(int cpu)
3667 {
3668 struct pktgen_thread *t;
3669 struct proc_dir_entry *pe;
3670 struct task_struct *p;
3671
3672 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL);
3673 if (!t) {
3674 printk(KERN_ERR "pktgen: ERROR: out of memory, can't "
3675 "create new thread.\n");
3676 return -ENOMEM;
3677 }
3678
3679 spin_lock_init(&t->if_lock);
3680 t->cpu = cpu;
3681
3682 INIT_LIST_HEAD(&t->if_list);
3683
3684 list_add_tail(&t->th_list, &pktgen_threads);
3685
3686 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu);
3687 if (IS_ERR(p)) {
3688 printk(KERN_ERR "pktgen: kernel_thread() failed "
3689 "for cpu %d\n", t->cpu);
3690 list_del(&t->th_list);
3691 kfree(t);
3692 return PTR_ERR(p);
3693 }
3694 kthread_bind(p, cpu);
3695 t->tsk = p;
3696
3697 pe = create_proc_entry(t->tsk->comm, 0600, pg_proc_dir);
3698 if (!pe) {
3699 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3700 PG_PROC_DIR, t->tsk->comm);
3701 kthread_stop(p);
3702 list_del(&t->th_list);
3703 kfree(t);
3704 return -EINVAL;
3705 }
3706
3707 pe->proc_fops = &pktgen_thread_fops;
3708 pe->data = t;
3709
3710 wake_up_process(p);
3711
3712 return 0;
3713 }
3714
3715 /*
3716 * Removes a device from the thread if_list.
3717 */
3718 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3719 struct pktgen_dev *pkt_dev)
3720 {
3721 struct list_head *q, *n;
3722 struct pktgen_dev *p;
3723
3724 list_for_each_safe(q, n, &t->if_list) {
3725 p = list_entry(q, struct pktgen_dev, list);
3726 if (p == pkt_dev)
3727 list_del(&p->list);
3728 }
3729 }
3730
3731 static int pktgen_remove_device(struct pktgen_thread *t,
3732 struct pktgen_dev *pkt_dev)
3733 {
3734
3735 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev);
3736
3737 if (pkt_dev->running) {
3738 printk(KERN_WARNING "pktgen: WARNING: trying to remove a "
3739 "running interface, stopping it now.\n");
3740 pktgen_stop_device(pkt_dev);
3741 }
3742
3743 /* Dis-associate from the interface */
3744
3745 if (pkt_dev->odev) {
3746 dev_put(pkt_dev->odev);
3747 pkt_dev->odev = NULL;
3748 }
3749
3750 /* And update the thread if_list */
3751
3752 _rem_dev_from_if_list(t, pkt_dev);
3753
3754 if (pkt_dev->entry)
3755 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3756
3757 #ifdef CONFIG_XFRM
3758 free_SAs(pkt_dev);
3759 #endif
3760 if (pkt_dev->flows)
3761 vfree(pkt_dev->flows);
3762 kfree(pkt_dev);
3763 return 0;
3764 }
3765
3766 static int __init pg_init(void)
3767 {
3768 int cpu;
3769 struct proc_dir_entry *pe;
3770
3771 printk(KERN_INFO "%s", version);
3772
3773 pg_proc_dir = proc_mkdir(PG_PROC_DIR, proc_net);
3774 if (!pg_proc_dir)
3775 return -ENODEV;
3776 pg_proc_dir->owner = THIS_MODULE;
3777
3778 pe = create_proc_entry(PGCTRL, 0600, pg_proc_dir);
3779 if (pe == NULL) {
3780 printk(KERN_ERR "pktgen: ERROR: cannot create %s "
3781 "procfs entry.\n", PGCTRL);
3782 proc_net_remove(PG_PROC_DIR);
3783 return -EINVAL;
3784 }
3785
3786 pe->proc_fops = &pktgen_fops;
3787 pe->data = NULL;
3788
3789 /* Register us to receive netdevice events */
3790 register_netdevice_notifier(&pktgen_notifier_block);
3791
3792 for_each_online_cpu(cpu) {
3793 int err;
3794
3795 err = pktgen_create_thread(cpu);
3796 if (err)
3797 printk(KERN_WARNING "pktgen: WARNING: Cannot create "
3798 "thread for cpu %d (%d)\n", cpu, err);
3799 }
3800
3801 if (list_empty(&pktgen_threads)) {
3802 printk(KERN_ERR "pktgen: ERROR: Initialization failed for "
3803 "all threads\n");
3804 unregister_netdevice_notifier(&pktgen_notifier_block);
3805 remove_proc_entry(PGCTRL, pg_proc_dir);
3806 proc_net_remove(PG_PROC_DIR);
3807 return -ENODEV;
3808 }
3809
3810 return 0;
3811 }
3812
3813 static void __exit pg_cleanup(void)
3814 {
3815 struct pktgen_thread *t;
3816 struct list_head *q, *n;
3817 wait_queue_head_t queue;
3818 init_waitqueue_head(&queue);
3819
3820 /* Stop all interfaces & threads */
3821
3822 list_for_each_safe(q, n, &pktgen_threads) {
3823 t = list_entry(q, struct pktgen_thread, th_list);
3824 kthread_stop(t->tsk);
3825 kfree(t);
3826 }
3827
3828 /* Un-register us from receiving netdevice events */
3829 unregister_netdevice_notifier(&pktgen_notifier_block);
3830
3831 /* Clean up proc file system */
3832 remove_proc_entry(PGCTRL, pg_proc_dir);
3833 proc_net_remove(PG_PROC_DIR);
3834 }
3835
3836 module_init(pg_init);
3837 module_exit(pg_cleanup);
3838
3839 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se");
3840 MODULE_DESCRIPTION("Packet Generator tool");
3841 MODULE_LICENSE("GPL");
3842 module_param(pg_count_d, int, 0);
3843 module_param(pg_delay_d, int, 0);
3844 module_param(pg_clone_skb_d, int, 0);
3845 module_param(debug, int, 0);
Linux kernel - Deliverables
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