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