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[SK_BUFF]: Introduce ip_hdr(), remove skb->nh.iph
[GitHub/LineageOS/android_kernel_motorola_exynos9610.git] / net / core / pktgen.c
1 /*
2 * Authors:
3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
4 * Uppsala University and
5 * Swedish University of Agricultural Sciences
6 *
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 * Ben Greear <greearb@candelatech.com>
9 * Jens Låås <jens.laas@data.slu.se>
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 *
16 *
17 * A tool for loading the network with preconfigurated packets.
18 * The tool is implemented as a linux module. Parameters are output
19 * device, delay (to hard_xmit), number of packets, and whether
20 * to use multiple SKBs or just the same one.
21 * pktgen uses the installed interface's output routine.
22 *
23 * Additional hacking by:
24 *
25 * Jens.Laas@data.slu.se
26 * Improved by ANK. 010120.
27 * Improved by ANK even more. 010212.
28 * MAC address typo fixed. 010417 --ro
29 * Integrated. 020301 --DaveM
30 * Added multiskb option 020301 --DaveM
31 * Scaling of results. 020417--sigurdur@linpro.no
32 * Significant re-work of the module:
33 * * Convert to threaded model to more efficiently be able to transmit
34 * and receive on multiple interfaces at once.
35 * * Converted many counters to __u64 to allow longer runs.
36 * * Allow configuration of ranges, like min/max IP address, MACs,
37 * and UDP-ports, for both source and destination, and can
38 * set to use a random distribution or sequentially walk the range.
39 * * Can now change most values after starting.
40 * * Place 12-byte packet in UDP payload with magic number,
41 * sequence number, and timestamp.
42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and
43 * latencies (with micro-second) precision.
44 * * Add IOCTL interface to easily get counters & configuration.
45 * --Ben Greear <greearb@candelatech.com>
46 *
47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
49 * as a "fastpath" with a configurable number of clones after alloc's.
50 * clone_skb=0 means all packets are allocated this also means ranges time
51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
52 * clones.
53 *
54 * Also moved to /proc/net/pktgen/
55 * --ro
56 *
57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
58 * mistakes. Also merged in DaveM's patch in the -pre6 patch.
59 * --Ben Greear <greearb@candelatech.com>
60 *
61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
62 *
63 *
64 * 021124 Finished major redesign and rewrite for new functionality.
65 * See Documentation/networking/pktgen.txt for how to use this.
66 *
67 * The new operation:
68 * For each CPU one thread/process is created at start. This process checks
69 * for running devices in the if_list and sends packets until count is 0 it
70 * also the thread checks the thread->control which is used for inter-process
71 * communication. controlling process "posts" operations to the threads this
72 * way. The if_lock should be possible to remove when add/rem_device is merged
73 * into this too.
74 *
75 * By design there should only be *one* "controlling" process. In practice
76 * multiple write accesses gives unpredictable result. Understood by "write"
77 * to /proc gives result code thats should be read be the "writer".
78 * For practical use this should be no problem.
79 *
80 * Note when adding devices to a specific CPU there good idea to also assign
81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
82 * --ro
83 *
84 * Fix refcount off by one if first packet fails, potential null deref,
85 * memleak 030710- KJP
86 *
87 * First "ranges" functionality for ipv6 030726 --ro
88 *
89 * Included flow support. 030802 ANK.
90 *
91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
92 *
93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
95 *
96 * New xmit() return, do_div and misc clean up by Stephen Hemminger
97 * <shemminger@osdl.org> 040923
98 *
99 * Randy Dunlap fixed u64 printk compiler waring
100 *
101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
103 *
104 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
106 *
107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
108 * 050103
109 *
110 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
111 *
112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
113 *
114 */
115 #include <linux/sys.h>
116 #include <linux/types.h>
117 #include <linux/module.h>
118 #include <linux/moduleparam.h>
119 #include <linux/kernel.h>
120 #include <linux/smp_lock.h>
121 #include <linux/mutex.h>
122 #include <linux/sched.h>
123 #include <linux/slab.h>
124 #include <linux/vmalloc.h>
125 #include <linux/unistd.h>
126 #include <linux/string.h>
127 #include <linux/ptrace.h>
128 #include <linux/errno.h>
129 #include <linux/ioport.h>
130 #include <linux/interrupt.h>
131 #include <linux/capability.h>
132 #include <linux/freezer.h>
133 #include <linux/delay.h>
134 #include <linux/timer.h>
135 #include <linux/list.h>
136 #include <linux/init.h>
137 #include <linux/skbuff.h>
138 #include <linux/netdevice.h>
139 #include <linux/inet.h>
140 #include <linux/inetdevice.h>
141 #include <linux/rtnetlink.h>
142 #include <linux/if_arp.h>
143 #include <linux/if_vlan.h>
144 #include <linux/in.h>
145 #include <linux/ip.h>
146 #include <linux/ipv6.h>
147 #include <linux/udp.h>
148 #include <linux/proc_fs.h>
149 #include <linux/seq_file.h>
150 #include <linux/wait.h>
151 #include <linux/etherdevice.h>
152 #include <linux/kthread.h>
153 #include <net/checksum.h>
154 #include <net/ipv6.h>
155 #include <net/addrconf.h>
156 #include <asm/byteorder.h>
157 #include <linux/rcupdate.h>
158 #include <asm/bitops.h>
159 #include <asm/io.h>
160 #include <asm/dma.h>
161 #include <asm/uaccess.h>
162 #include <asm/div64.h> /* do_div */
163 #include <asm/timex.h>
164
165 #define VERSION "pktgen v2.68: Packet Generator for packet performance testing.\n"
166
167 /* The buckets are exponential in 'width' */
168 #define LAT_BUCKETS_MAX 32
169 #define IP_NAME_SZ 32
170 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
171 #define MPLS_STACK_BOTTOM htonl(0x00000100)
172
173 /* Device flag bits */
174 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
175 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
176 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
177 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
178 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
179 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
180 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
181 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
182 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
183 #define F_VID_RND (1<<9) /* Random VLAN ID */
184 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
185
186 /* Thread control flag bits */
187 #define T_TERMINATE (1<<0)
188 #define T_STOP (1<<1) /* Stop run */
189 #define T_RUN (1<<2) /* Start run */
190 #define T_REMDEVALL (1<<3) /* Remove all devs */
191 #define T_REMDEV (1<<4) /* Remove one dev */
192
193 /* If lock -- can be removed after some work */
194 #define if_lock(t) spin_lock(&(t->if_lock));
195 #define if_unlock(t) spin_unlock(&(t->if_lock));
196
197 /* Used to help with determining the pkts on receive */
198 #define PKTGEN_MAGIC 0xbe9be955
199 #define PG_PROC_DIR "pktgen"
200 #define PGCTRL "pgctrl"
201 static struct proc_dir_entry *pg_proc_dir = NULL;
202
203 #define MAX_CFLOWS 65536
204
205 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
206 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
207
208 struct flow_state {
209 __be32 cur_daddr;
210 int count;
211 };
212
213 struct pktgen_dev {
214 /*
215 * Try to keep frequent/infrequent used vars. separated.
216 */
217 struct proc_dir_entry *entry; /* proc file */
218 struct pktgen_thread *pg_thread;/* the owner */
219 struct list_head list; /* Used for chaining in the thread's run-queue */
220
221 int running; /* if this changes to false, the test will stop */
222
223 /* If min != max, then we will either do a linear iteration, or
224 * we will do a random selection from within the range.
225 */
226 __u32 flags;
227 int removal_mark; /* non-zero => the device is marked for
228 * removal by worker thread */
229
230 int min_pkt_size; /* = ETH_ZLEN; */
231 int max_pkt_size; /* = ETH_ZLEN; */
232 int nfrags;
233 __u32 delay_us; /* Default delay */
234 __u32 delay_ns;
235 __u64 count; /* Default No packets to send */
236 __u64 sofar; /* How many pkts we've sent so far */
237 __u64 tx_bytes; /* How many bytes we've transmitted */
238 __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */
239
240 /* runtime counters relating to clone_skb */
241 __u64 next_tx_us; /* timestamp of when to tx next */
242 __u32 next_tx_ns;
243
244 __u64 allocated_skbs;
245 __u32 clone_count;
246 int last_ok; /* Was last skb sent?
247 * Or a failed transmit of some sort? This will keep
248 * sequence numbers in order, for example.
249 */
250 __u64 started_at; /* micro-seconds */
251 __u64 stopped_at; /* micro-seconds */
252 __u64 idle_acc; /* micro-seconds */
253 __u32 seq_num;
254
255 int clone_skb; /* Use multiple SKBs during packet gen. If this number
256 * is greater than 1, then that many copies of the same
257 * packet will be sent before a new packet is allocated.
258 * For instance, if you want to send 1024 identical packets
259 * before creating a new packet, set clone_skb to 1024.
260 */
261
262 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
263 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
264 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
265 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
266
267 struct in6_addr in6_saddr;
268 struct in6_addr in6_daddr;
269 struct in6_addr cur_in6_daddr;
270 struct in6_addr cur_in6_saddr;
271 /* For ranges */
272 struct in6_addr min_in6_daddr;
273 struct in6_addr max_in6_daddr;
274 struct in6_addr min_in6_saddr;
275 struct in6_addr max_in6_saddr;
276
277 /* If we're doing ranges, random or incremental, then this
278 * defines the min/max for those ranges.
279 */
280 __be32 saddr_min; /* inclusive, source IP address */
281 __be32 saddr_max; /* exclusive, source IP address */
282 __be32 daddr_min; /* inclusive, dest IP address */
283 __be32 daddr_max; /* exclusive, dest IP address */
284
285 __u16 udp_src_min; /* inclusive, source UDP port */
286 __u16 udp_src_max; /* exclusive, source UDP port */
287 __u16 udp_dst_min; /* inclusive, dest UDP port */
288 __u16 udp_dst_max; /* exclusive, dest UDP port */
289
290 /* DSCP + ECN */
291 __u8 tos; /* six most significant bits of (former) IPv4 TOS are for dscp codepoint */
292 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 (see RFC 3260, sec. 4) */
293
294 /* MPLS */
295 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
296 __be32 labels[MAX_MPLS_LABELS];
297
298 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
299 __u8 vlan_p;
300 __u8 vlan_cfi;
301 __u16 vlan_id; /* 0xffff means no vlan tag */
302
303 __u8 svlan_p;
304 __u8 svlan_cfi;
305 __u16 svlan_id; /* 0xffff means no svlan tag */
306
307 __u32 src_mac_count; /* How many MACs to iterate through */
308 __u32 dst_mac_count; /* How many MACs to iterate through */
309
310 unsigned char dst_mac[ETH_ALEN];
311 unsigned char src_mac[ETH_ALEN];
312
313 __u32 cur_dst_mac_offset;
314 __u32 cur_src_mac_offset;
315 __be32 cur_saddr;
316 __be32 cur_daddr;
317 __u16 cur_udp_dst;
318 __u16 cur_udp_src;
319 __u32 cur_pkt_size;
320
321 __u8 hh[14];
322 /* = {
323 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
324
325 We fill in SRC address later
326 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
327 0x08, 0x00
328 };
329 */
330 __u16 pad; /* pad out the hh struct to an even 16 bytes */
331
332 struct sk_buff *skb; /* skb we are to transmit next, mainly used for when we
333 * are transmitting the same one multiple times
334 */
335 struct net_device *odev; /* The out-going device. Note that the device should
336 * have it's pg_info pointer pointing back to this
337 * device. This will be set when the user specifies
338 * the out-going device name (not when the inject is
339 * started as it used to do.)
340 */
341 struct flow_state *flows;
342 unsigned cflows; /* Concurrent flows (config) */
343 unsigned lflow; /* Flow length (config) */
344 unsigned nflows; /* accumulated flows (stats) */
345
346 char result[512];
347 };
348
349 struct pktgen_hdr {
350 __be32 pgh_magic;
351 __be32 seq_num;
352 __be32 tv_sec;
353 __be32 tv_usec;
354 };
355
356 struct pktgen_thread {
357 spinlock_t if_lock;
358 struct list_head if_list; /* All device here */
359 struct list_head th_list;
360 struct task_struct *tsk;
361 char result[512];
362 u32 max_before_softirq; /* We'll call do_softirq to prevent starvation. */
363
364 /* Field for thread to receive "posted" events terminate, stop ifs etc. */
365
366 u32 control;
367 int pid;
368 int cpu;
369
370 wait_queue_head_t queue;
371 };
372
373 #define REMOVE 1
374 #define FIND 0
375
376 /* This code works around the fact that do_div cannot handle two 64-bit
377 numbers, and regular 64-bit division doesn't work on x86 kernels.
378 --Ben
379 */
380
381 #define PG_DIV 0
382
383 /* This was emailed to LMKL by: Chris Caputo <ccaputo@alt.net>
384 * Function copied/adapted/optimized from:
385 *
386 * nemesis.sourceforge.net/browse/lib/static/intmath/ix86/intmath.c.html
387 *
388 * Copyright 1994, University of Cambridge Computer Laboratory
389 * All Rights Reserved.
390 *
391 */
392 static inline s64 divremdi3(s64 x, s64 y, int type)
393 {
394 u64 a = (x < 0) ? -x : x;
395 u64 b = (y < 0) ? -y : y;
396 u64 res = 0, d = 1;
397
398 if (b > 0) {
399 while (b < a) {
400 b <<= 1;
401 d <<= 1;
402 }
403 }
404
405 do {
406 if (a >= b) {
407 a -= b;
408 res += d;
409 }
410 b >>= 1;
411 d >>= 1;
412 }
413 while (d);
414
415 if (PG_DIV == type) {
416 return (((x ^ y) & (1ll << 63)) == 0) ? res : -(s64) res;
417 } else {
418 return ((x & (1ll << 63)) == 0) ? a : -(s64) a;
419 }
420 }
421
422 /* End of hacks to deal with 64-bit math on x86 */
423
424 /** Convert to milliseconds */
425 static inline __u64 tv_to_ms(const struct timeval *tv)
426 {
427 __u64 ms = tv->tv_usec / 1000;
428 ms += (__u64) tv->tv_sec * (__u64) 1000;
429 return ms;
430 }
431
432 /** Convert to micro-seconds */
433 static inline __u64 tv_to_us(const struct timeval *tv)
434 {
435 __u64 us = tv->tv_usec;
436 us += (__u64) tv->tv_sec * (__u64) 1000000;
437 return us;
438 }
439
440 static inline __u64 pg_div(__u64 n, __u32 base)
441 {
442 __u64 tmp = n;
443 do_div(tmp, base);
444 /* printk("pktgen: pg_div, n: %llu base: %d rv: %llu\n",
445 n, base, tmp); */
446 return tmp;
447 }
448
449 static inline __u64 pg_div64(__u64 n, __u64 base)
450 {
451 __u64 tmp = n;
452 /*
453 * How do we know if the architecture we are running on
454 * supports division with 64 bit base?
455 *
456 */
457 #if defined(__sparc_v9__) || defined(__powerpc64__) || defined(__alpha__) || defined(__x86_64__) || defined(__ia64__)
458
459 do_div(tmp, base);
460 #else
461 tmp = divremdi3(n, base, PG_DIV);
462 #endif
463 return tmp;
464 }
465
466 static inline __u64 getCurMs(void)
467 {
468 struct timeval tv;
469 do_gettimeofday(&tv);
470 return tv_to_ms(&tv);
471 }
472
473 static inline __u64 getCurUs(void)
474 {
475 struct timeval tv;
476 do_gettimeofday(&tv);
477 return tv_to_us(&tv);
478 }
479
480 static inline __u64 tv_diff(const struct timeval *a, const struct timeval *b)
481 {
482 return tv_to_us(a) - tv_to_us(b);
483 }
484
485 /* old include end */
486
487 static char version[] __initdata = VERSION;
488
489 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
490 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
491 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
492 const char *ifname);
493 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
494 static void pktgen_run_all_threads(void);
495 static void pktgen_stop_all_threads_ifs(void);
496 static int pktgen_stop_device(struct pktgen_dev *pkt_dev);
497 static void pktgen_stop(struct pktgen_thread *t);
498 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
499
500 static unsigned int scan_ip6(const char *s, char ip[16]);
501 static unsigned int fmt_ip6(char *s, const char ip[16]);
502
503 /* Module parameters, defaults. */
504 static int pg_count_d = 1000; /* 1000 pkts by default */
505 static int pg_delay_d;
506 static int pg_clone_skb_d;
507 static int debug;
508
509 static DEFINE_MUTEX(pktgen_thread_lock);
510 static LIST_HEAD(pktgen_threads);
511
512 static struct notifier_block pktgen_notifier_block = {
513 .notifier_call = pktgen_device_event,
514 };
515
516 /*
517 * /proc handling functions
518 *
519 */
520
521 static int pgctrl_show(struct seq_file *seq, void *v)
522 {
523 seq_puts(seq, VERSION);
524 return 0;
525 }
526
527 static ssize_t pgctrl_write(struct file *file, const char __user * buf,
528 size_t count, loff_t * ppos)
529 {
530 int err = 0;
531 char data[128];
532
533 if (!capable(CAP_NET_ADMIN)) {
534 err = -EPERM;
535 goto out;
536 }
537
538 if (count > sizeof(data))
539 count = sizeof(data);
540
541 if (copy_from_user(data, buf, count)) {
542 err = -EFAULT;
543 goto out;
544 }
545 data[count - 1] = 0; /* Make string */
546
547 if (!strcmp(data, "stop"))
548 pktgen_stop_all_threads_ifs();
549
550 else if (!strcmp(data, "start"))
551 pktgen_run_all_threads();
552
553 else
554 printk("pktgen: Unknown command: %s\n", data);
555
556 err = count;
557
558 out:
559 return err;
560 }
561
562 static int pgctrl_open(struct inode *inode, struct file *file)
563 {
564 return single_open(file, pgctrl_show, PDE(inode)->data);
565 }
566
567 static const struct file_operations pktgen_fops = {
568 .owner = THIS_MODULE,
569 .open = pgctrl_open,
570 .read = seq_read,
571 .llseek = seq_lseek,
572 .write = pgctrl_write,
573 .release = single_release,
574 };
575
576 static int pktgen_if_show(struct seq_file *seq, void *v)
577 {
578 int i;
579 struct pktgen_dev *pkt_dev = seq->private;
580 __u64 sa;
581 __u64 stopped;
582 __u64 now = getCurUs();
583
584 seq_printf(seq,
585 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
586 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
587 pkt_dev->max_pkt_size);
588
589 seq_printf(seq,
590 " frags: %d delay: %u clone_skb: %d ifname: %s\n",
591 pkt_dev->nfrags,
592 1000 * pkt_dev->delay_us + pkt_dev->delay_ns,
593 pkt_dev->clone_skb, pkt_dev->odev->name);
594
595 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
596 pkt_dev->lflow);
597
598 if (pkt_dev->flags & F_IPV6) {
599 char b1[128], b2[128], b3[128];
600 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
601 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
602 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
603 seq_printf(seq,
604 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
605 b2, b3);
606
607 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
608 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
609 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
610 seq_printf(seq,
611 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
612 b2, b3);
613
614 } else
615 seq_printf(seq,
616 " dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n",
617 pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min,
618 pkt_dev->src_max);
619
620 seq_puts(seq, " src_mac: ");
621
622 if (is_zero_ether_addr(pkt_dev->src_mac))
623 for (i = 0; i < 6; i++)
624 seq_printf(seq, "%02X%s", pkt_dev->odev->dev_addr[i],
625 i == 5 ? " " : ":");
626 else
627 for (i = 0; i < 6; i++)
628 seq_printf(seq, "%02X%s", pkt_dev->src_mac[i],
629 i == 5 ? " " : ":");
630
631 seq_printf(seq, "dst_mac: ");
632 for (i = 0; i < 6; i++)
633 seq_printf(seq, "%02X%s", pkt_dev->dst_mac[i],
634 i == 5 ? "\n" : ":");
635
636 seq_printf(seq,
637 " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n",
638 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
639 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
640
641 seq_printf(seq,
642 " src_mac_count: %d dst_mac_count: %d\n",
643 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
644
645 if (pkt_dev->nr_labels) {
646 unsigned i;
647 seq_printf(seq, " mpls: ");
648 for (i = 0; i < pkt_dev->nr_labels; i++)
649 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
650 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
651 }
652
653 if (pkt_dev->vlan_id != 0xffff) {
654 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
655 pkt_dev->vlan_id, pkt_dev->vlan_p, pkt_dev->vlan_cfi);
656 }
657
658 if (pkt_dev->svlan_id != 0xffff) {
659 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
660 pkt_dev->svlan_id, pkt_dev->svlan_p, pkt_dev->svlan_cfi);
661 }
662
663 if (pkt_dev->tos) {
664 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
665 }
666
667 if (pkt_dev->traffic_class) {
668 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
669 }
670
671 seq_printf(seq, " Flags: ");
672
673 if (pkt_dev->flags & F_IPV6)
674 seq_printf(seq, "IPV6 ");
675
676 if (pkt_dev->flags & F_IPSRC_RND)
677 seq_printf(seq, "IPSRC_RND ");
678
679 if (pkt_dev->flags & F_IPDST_RND)
680 seq_printf(seq, "IPDST_RND ");
681
682 if (pkt_dev->flags & F_TXSIZE_RND)
683 seq_printf(seq, "TXSIZE_RND ");
684
685 if (pkt_dev->flags & F_UDPSRC_RND)
686 seq_printf(seq, "UDPSRC_RND ");
687
688 if (pkt_dev->flags & F_UDPDST_RND)
689 seq_printf(seq, "UDPDST_RND ");
690
691 if (pkt_dev->flags & F_MPLS_RND)
692 seq_printf(seq, "MPLS_RND ");
693
694 if (pkt_dev->flags & F_MACSRC_RND)
695 seq_printf(seq, "MACSRC_RND ");
696
697 if (pkt_dev->flags & F_MACDST_RND)
698 seq_printf(seq, "MACDST_RND ");
699
700 if (pkt_dev->flags & F_VID_RND)
701 seq_printf(seq, "VID_RND ");
702
703 if (pkt_dev->flags & F_SVID_RND)
704 seq_printf(seq, "SVID_RND ");
705
706 seq_puts(seq, "\n");
707
708 sa = pkt_dev->started_at;
709 stopped = pkt_dev->stopped_at;
710 if (pkt_dev->running)
711 stopped = now; /* not really stopped, more like last-running-at */
712
713 seq_printf(seq,
714 "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n",
715 (unsigned long long)pkt_dev->sofar,
716 (unsigned long long)pkt_dev->errors, (unsigned long long)sa,
717 (unsigned long long)stopped,
718 (unsigned long long)pkt_dev->idle_acc);
719
720 seq_printf(seq,
721 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
722 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
723 pkt_dev->cur_src_mac_offset);
724
725 if (pkt_dev->flags & F_IPV6) {
726 char b1[128], b2[128];
727 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
728 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
729 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
730 } else
731 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
732 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
733
734 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
735 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
736
737 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
738
739 if (pkt_dev->result[0])
740 seq_printf(seq, "Result: %s\n", pkt_dev->result);
741 else
742 seq_printf(seq, "Result: Idle\n");
743
744 return 0;
745 }
746
747
748 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, __u32 *num)
749 {
750 int i = 0;
751 *num = 0;
752
753 for (; i < maxlen; i++) {
754 char c;
755 *num <<= 4;
756 if (get_user(c, &user_buffer[i]))
757 return -EFAULT;
758 if ((c >= '0') && (c <= '9'))
759 *num |= c - '0';
760 else if ((c >= 'a') && (c <= 'f'))
761 *num |= c - 'a' + 10;
762 else if ((c >= 'A') && (c <= 'F'))
763 *num |= c - 'A' + 10;
764 else
765 break;
766 }
767 return i;
768 }
769
770 static int count_trail_chars(const char __user * user_buffer,
771 unsigned int maxlen)
772 {
773 int i;
774
775 for (i = 0; i < maxlen; i++) {
776 char c;
777 if (get_user(c, &user_buffer[i]))
778 return -EFAULT;
779 switch (c) {
780 case '\"':
781 case '\n':
782 case '\r':
783 case '\t':
784 case ' ':
785 case '=':
786 break;
787 default:
788 goto done;
789 };
790 }
791 done:
792 return i;
793 }
794
795 static unsigned long num_arg(const char __user * user_buffer,
796 unsigned long maxlen, unsigned long *num)
797 {
798 int i = 0;
799 *num = 0;
800
801 for (; i < maxlen; i++) {
802 char c;
803 if (get_user(c, &user_buffer[i]))
804 return -EFAULT;
805 if ((c >= '0') && (c <= '9')) {
806 *num *= 10;
807 *num += c - '0';
808 } else
809 break;
810 }
811 return i;
812 }
813
814 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
815 {
816 int i = 0;
817
818 for (; i < maxlen; i++) {
819 char c;
820 if (get_user(c, &user_buffer[i]))
821 return -EFAULT;
822 switch (c) {
823 case '\"':
824 case '\n':
825 case '\r':
826 case '\t':
827 case ' ':
828 goto done_str;
829 break;
830 default:
831 break;
832 };
833 }
834 done_str:
835 return i;
836 }
837
838 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
839 {
840 unsigned n = 0;
841 char c;
842 ssize_t i = 0;
843 int len;
844
845 pkt_dev->nr_labels = 0;
846 do {
847 __u32 tmp;
848 len = hex32_arg(&buffer[i], 8, &tmp);
849 if (len <= 0)
850 return len;
851 pkt_dev->labels[n] = htonl(tmp);
852 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
853 pkt_dev->flags |= F_MPLS_RND;
854 i += len;
855 if (get_user(c, &buffer[i]))
856 return -EFAULT;
857 i++;
858 n++;
859 if (n >= MAX_MPLS_LABELS)
860 return -E2BIG;
861 } while (c == ',');
862
863 pkt_dev->nr_labels = n;
864 return i;
865 }
866
867 static ssize_t pktgen_if_write(struct file *file,
868 const char __user * user_buffer, size_t count,
869 loff_t * offset)
870 {
871 struct seq_file *seq = (struct seq_file *)file->private_data;
872 struct pktgen_dev *pkt_dev = seq->private;
873 int i = 0, max, len;
874 char name[16], valstr[32];
875 unsigned long value = 0;
876 char *pg_result = NULL;
877 int tmp = 0;
878 char buf[128];
879
880 pg_result = &(pkt_dev->result[0]);
881
882 if (count < 1) {
883 printk("pktgen: wrong command format\n");
884 return -EINVAL;
885 }
886
887 max = count - i;
888 tmp = count_trail_chars(&user_buffer[i], max);
889 if (tmp < 0) {
890 printk("pktgen: illegal format\n");
891 return tmp;
892 }
893 i += tmp;
894
895 /* Read variable name */
896
897 len = strn_len(&user_buffer[i], sizeof(name) - 1);
898 if (len < 0) {
899 return len;
900 }
901 memset(name, 0, sizeof(name));
902 if (copy_from_user(name, &user_buffer[i], len))
903 return -EFAULT;
904 i += len;
905
906 max = count - i;
907 len = count_trail_chars(&user_buffer[i], max);
908 if (len < 0)
909 return len;
910
911 i += len;
912
913 if (debug) {
914 char tb[count + 1];
915 if (copy_from_user(tb, user_buffer, count))
916 return -EFAULT;
917 tb[count] = 0;
918 printk("pktgen: %s,%lu buffer -:%s:-\n", name,
919 (unsigned long)count, tb);
920 }
921
922 if (!strcmp(name, "min_pkt_size")) {
923 len = num_arg(&user_buffer[i], 10, &value);
924 if (len < 0) {
925 return len;
926 }
927 i += len;
928 if (value < 14 + 20 + 8)
929 value = 14 + 20 + 8;
930 if (value != pkt_dev->min_pkt_size) {
931 pkt_dev->min_pkt_size = value;
932 pkt_dev->cur_pkt_size = value;
933 }
934 sprintf(pg_result, "OK: min_pkt_size=%u",
935 pkt_dev->min_pkt_size);
936 return count;
937 }
938
939 if (!strcmp(name, "max_pkt_size")) {
940 len = num_arg(&user_buffer[i], 10, &value);
941 if (len < 0) {
942 return len;
943 }
944 i += len;
945 if (value < 14 + 20 + 8)
946 value = 14 + 20 + 8;
947 if (value != pkt_dev->max_pkt_size) {
948 pkt_dev->max_pkt_size = value;
949 pkt_dev->cur_pkt_size = value;
950 }
951 sprintf(pg_result, "OK: max_pkt_size=%u",
952 pkt_dev->max_pkt_size);
953 return count;
954 }
955
956 /* Shortcut for min = max */
957
958 if (!strcmp(name, "pkt_size")) {
959 len = num_arg(&user_buffer[i], 10, &value);
960 if (len < 0) {
961 return len;
962 }
963 i += len;
964 if (value < 14 + 20 + 8)
965 value = 14 + 20 + 8;
966 if (value != pkt_dev->min_pkt_size) {
967 pkt_dev->min_pkt_size = value;
968 pkt_dev->max_pkt_size = value;
969 pkt_dev->cur_pkt_size = value;
970 }
971 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
972 return count;
973 }
974
975 if (!strcmp(name, "debug")) {
976 len = num_arg(&user_buffer[i], 10, &value);
977 if (len < 0) {
978 return len;
979 }
980 i += len;
981 debug = value;
982 sprintf(pg_result, "OK: debug=%u", debug);
983 return count;
984 }
985
986 if (!strcmp(name, "frags")) {
987 len = num_arg(&user_buffer[i], 10, &value);
988 if (len < 0) {
989 return len;
990 }
991 i += len;
992 pkt_dev->nfrags = value;
993 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
994 return count;
995 }
996 if (!strcmp(name, "delay")) {
997 len = num_arg(&user_buffer[i], 10, &value);
998 if (len < 0) {
999 return len;
1000 }
1001 i += len;
1002 if (value == 0x7FFFFFFF) {
1003 pkt_dev->delay_us = 0x7FFFFFFF;
1004 pkt_dev->delay_ns = 0;
1005 } else {
1006 pkt_dev->delay_us = value / 1000;
1007 pkt_dev->delay_ns = value % 1000;
1008 }
1009 sprintf(pg_result, "OK: delay=%u",
1010 1000 * pkt_dev->delay_us + pkt_dev->delay_ns);
1011 return count;
1012 }
1013 if (!strcmp(name, "udp_src_min")) {
1014 len = num_arg(&user_buffer[i], 10, &value);
1015 if (len < 0) {
1016 return len;
1017 }
1018 i += len;
1019 if (value != pkt_dev->udp_src_min) {
1020 pkt_dev->udp_src_min = value;
1021 pkt_dev->cur_udp_src = value;
1022 }
1023 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1024 return count;
1025 }
1026 if (!strcmp(name, "udp_dst_min")) {
1027 len = num_arg(&user_buffer[i], 10, &value);
1028 if (len < 0) {
1029 return len;
1030 }
1031 i += len;
1032 if (value != pkt_dev->udp_dst_min) {
1033 pkt_dev->udp_dst_min = value;
1034 pkt_dev->cur_udp_dst = value;
1035 }
1036 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1037 return count;
1038 }
1039 if (!strcmp(name, "udp_src_max")) {
1040 len = num_arg(&user_buffer[i], 10, &value);
1041 if (len < 0) {
1042 return len;
1043 }
1044 i += len;
1045 if (value != pkt_dev->udp_src_max) {
1046 pkt_dev->udp_src_max = value;
1047 pkt_dev->cur_udp_src = value;
1048 }
1049 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1050 return count;
1051 }
1052 if (!strcmp(name, "udp_dst_max")) {
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_dst_max) {
1059 pkt_dev->udp_dst_max = value;
1060 pkt_dev->cur_udp_dst = value;
1061 }
1062 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1063 return count;
1064 }
1065 if (!strcmp(name, "clone_skb")) {
1066 len = num_arg(&user_buffer[i], 10, &value);
1067 if (len < 0) {
1068 return len;
1069 }
1070 i += len;
1071 pkt_dev->clone_skb = value;
1072
1073 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1074 return count;
1075 }
1076 if (!strcmp(name, "count")) {
1077 len = num_arg(&user_buffer[i], 10, &value);
1078 if (len < 0) {
1079 return len;
1080 }
1081 i += len;
1082 pkt_dev->count = value;
1083 sprintf(pg_result, "OK: count=%llu",
1084 (unsigned long long)pkt_dev->count);
1085 return count;
1086 }
1087 if (!strcmp(name, "src_mac_count")) {
1088 len = num_arg(&user_buffer[i], 10, &value);
1089 if (len < 0) {
1090 return len;
1091 }
1092 i += len;
1093 if (pkt_dev->src_mac_count != value) {
1094 pkt_dev->src_mac_count = value;
1095 pkt_dev->cur_src_mac_offset = 0;
1096 }
1097 sprintf(pg_result, "OK: src_mac_count=%d",
1098 pkt_dev->src_mac_count);
1099 return count;
1100 }
1101 if (!strcmp(name, "dst_mac_count")) {
1102 len = num_arg(&user_buffer[i], 10, &value);
1103 if (len < 0) {
1104 return len;
1105 }
1106 i += len;
1107 if (pkt_dev->dst_mac_count != value) {
1108 pkt_dev->dst_mac_count = value;
1109 pkt_dev->cur_dst_mac_offset = 0;
1110 }
1111 sprintf(pg_result, "OK: dst_mac_count=%d",
1112 pkt_dev->dst_mac_count);
1113 return count;
1114 }
1115 if (!strcmp(name, "flag")) {
1116 char f[32];
1117 memset(f, 0, 32);
1118 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1119 if (len < 0) {
1120 return len;
1121 }
1122 if (copy_from_user(f, &user_buffer[i], len))
1123 return -EFAULT;
1124 i += len;
1125 if (strcmp(f, "IPSRC_RND") == 0)
1126 pkt_dev->flags |= F_IPSRC_RND;
1127
1128 else if (strcmp(f, "!IPSRC_RND") == 0)
1129 pkt_dev->flags &= ~F_IPSRC_RND;
1130
1131 else if (strcmp(f, "TXSIZE_RND") == 0)
1132 pkt_dev->flags |= F_TXSIZE_RND;
1133
1134 else if (strcmp(f, "!TXSIZE_RND") == 0)
1135 pkt_dev->flags &= ~F_TXSIZE_RND;
1136
1137 else if (strcmp(f, "IPDST_RND") == 0)
1138 pkt_dev->flags |= F_IPDST_RND;
1139
1140 else if (strcmp(f, "!IPDST_RND") == 0)
1141 pkt_dev->flags &= ~F_IPDST_RND;
1142
1143 else if (strcmp(f, "UDPSRC_RND") == 0)
1144 pkt_dev->flags |= F_UDPSRC_RND;
1145
1146 else if (strcmp(f, "!UDPSRC_RND") == 0)
1147 pkt_dev->flags &= ~F_UDPSRC_RND;
1148
1149 else if (strcmp(f, "UDPDST_RND") == 0)
1150 pkt_dev->flags |= F_UDPDST_RND;
1151
1152 else if (strcmp(f, "!UDPDST_RND") == 0)
1153 pkt_dev->flags &= ~F_UDPDST_RND;
1154
1155 else if (strcmp(f, "MACSRC_RND") == 0)
1156 pkt_dev->flags |= F_MACSRC_RND;
1157
1158 else if (strcmp(f, "!MACSRC_RND") == 0)
1159 pkt_dev->flags &= ~F_MACSRC_RND;
1160
1161 else if (strcmp(f, "MACDST_RND") == 0)
1162 pkt_dev->flags |= F_MACDST_RND;
1163
1164 else if (strcmp(f, "!MACDST_RND") == 0)
1165 pkt_dev->flags &= ~F_MACDST_RND;
1166
1167 else if (strcmp(f, "MPLS_RND") == 0)
1168 pkt_dev->flags |= F_MPLS_RND;
1169
1170 else if (strcmp(f, "!MPLS_RND") == 0)
1171 pkt_dev->flags &= ~F_MPLS_RND;
1172
1173 else if (strcmp(f, "VID_RND") == 0)
1174 pkt_dev->flags |= F_VID_RND;
1175
1176 else if (strcmp(f, "!VID_RND") == 0)
1177 pkt_dev->flags &= ~F_VID_RND;
1178
1179 else if (strcmp(f, "SVID_RND") == 0)
1180 pkt_dev->flags |= F_SVID_RND;
1181
1182 else if (strcmp(f, "!SVID_RND") == 0)
1183 pkt_dev->flags &= ~F_SVID_RND;
1184
1185 else if (strcmp(f, "!IPV6") == 0)
1186 pkt_dev->flags &= ~F_IPV6;
1187
1188 else {
1189 sprintf(pg_result,
1190 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1191 f,
1192 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1193 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND\n");
1194 return count;
1195 }
1196 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1197 return count;
1198 }
1199 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1200 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1201 if (len < 0) {
1202 return len;
1203 }
1204
1205 if (copy_from_user(buf, &user_buffer[i], len))
1206 return -EFAULT;
1207 buf[len] = 0;
1208 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1209 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1210 strncpy(pkt_dev->dst_min, buf, len);
1211 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1212 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1213 }
1214 if (debug)
1215 printk("pktgen: dst_min set to: %s\n",
1216 pkt_dev->dst_min);
1217 i += len;
1218 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1219 return count;
1220 }
1221 if (!strcmp(name, "dst_max")) {
1222 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1223 if (len < 0) {
1224 return len;
1225 }
1226
1227 if (copy_from_user(buf, &user_buffer[i], len))
1228 return -EFAULT;
1229
1230 buf[len] = 0;
1231 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1232 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1233 strncpy(pkt_dev->dst_max, buf, len);
1234 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1235 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1236 }
1237 if (debug)
1238 printk("pktgen: dst_max set to: %s\n",
1239 pkt_dev->dst_max);
1240 i += len;
1241 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1242 return count;
1243 }
1244 if (!strcmp(name, "dst6")) {
1245 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1246 if (len < 0)
1247 return len;
1248
1249 pkt_dev->flags |= F_IPV6;
1250
1251 if (copy_from_user(buf, &user_buffer[i], len))
1252 return -EFAULT;
1253 buf[len] = 0;
1254
1255 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1256 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1257
1258 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1259
1260 if (debug)
1261 printk("pktgen: dst6 set to: %s\n", buf);
1262
1263 i += len;
1264 sprintf(pg_result, "OK: dst6=%s", buf);
1265 return count;
1266 }
1267 if (!strcmp(name, "dst6_min")) {
1268 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1269 if (len < 0)
1270 return len;
1271
1272 pkt_dev->flags |= F_IPV6;
1273
1274 if (copy_from_user(buf, &user_buffer[i], len))
1275 return -EFAULT;
1276 buf[len] = 0;
1277
1278 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1279 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1280
1281 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1282 &pkt_dev->min_in6_daddr);
1283 if (debug)
1284 printk("pktgen: dst6_min set to: %s\n", buf);
1285
1286 i += len;
1287 sprintf(pg_result, "OK: dst6_min=%s", buf);
1288 return count;
1289 }
1290 if (!strcmp(name, "dst6_max")) {
1291 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1292 if (len < 0)
1293 return len;
1294
1295 pkt_dev->flags |= F_IPV6;
1296
1297 if (copy_from_user(buf, &user_buffer[i], len))
1298 return -EFAULT;
1299 buf[len] = 0;
1300
1301 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1302 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1303
1304 if (debug)
1305 printk("pktgen: dst6_max set to: %s\n", buf);
1306
1307 i += len;
1308 sprintf(pg_result, "OK: dst6_max=%s", buf);
1309 return count;
1310 }
1311 if (!strcmp(name, "src6")) {
1312 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1313 if (len < 0)
1314 return len;
1315
1316 pkt_dev->flags |= F_IPV6;
1317
1318 if (copy_from_user(buf, &user_buffer[i], len))
1319 return -EFAULT;
1320 buf[len] = 0;
1321
1322 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1323 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1324
1325 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1326
1327 if (debug)
1328 printk("pktgen: src6 set to: %s\n", buf);
1329
1330 i += len;
1331 sprintf(pg_result, "OK: src6=%s", buf);
1332 return count;
1333 }
1334 if (!strcmp(name, "src_min")) {
1335 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1336 if (len < 0) {
1337 return len;
1338 }
1339 if (copy_from_user(buf, &user_buffer[i], len))
1340 return -EFAULT;
1341 buf[len] = 0;
1342 if (strcmp(buf, pkt_dev->src_min) != 0) {
1343 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1344 strncpy(pkt_dev->src_min, buf, len);
1345 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1346 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1347 }
1348 if (debug)
1349 printk("pktgen: src_min set to: %s\n",
1350 pkt_dev->src_min);
1351 i += len;
1352 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1353 return count;
1354 }
1355 if (!strcmp(name, "src_max")) {
1356 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1357 if (len < 0) {
1358 return len;
1359 }
1360 if (copy_from_user(buf, &user_buffer[i], len))
1361 return -EFAULT;
1362 buf[len] = 0;
1363 if (strcmp(buf, pkt_dev->src_max) != 0) {
1364 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1365 strncpy(pkt_dev->src_max, buf, len);
1366 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1367 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1368 }
1369 if (debug)
1370 printk("pktgen: src_max set to: %s\n",
1371 pkt_dev->src_max);
1372 i += len;
1373 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1374 return count;
1375 }
1376 if (!strcmp(name, "dst_mac")) {
1377 char *v = valstr;
1378 unsigned char old_dmac[ETH_ALEN];
1379 unsigned char *m = pkt_dev->dst_mac;
1380 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1381
1382 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1383 if (len < 0) {
1384 return len;
1385 }
1386 memset(valstr, 0, sizeof(valstr));
1387 if (copy_from_user(valstr, &user_buffer[i], len))
1388 return -EFAULT;
1389 i += len;
1390
1391 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1392 if (*v >= '0' && *v <= '9') {
1393 *m *= 16;
1394 *m += *v - '0';
1395 }
1396 if (*v >= 'A' && *v <= 'F') {
1397 *m *= 16;
1398 *m += *v - 'A' + 10;
1399 }
1400 if (*v >= 'a' && *v <= 'f') {
1401 *m *= 16;
1402 *m += *v - 'a' + 10;
1403 }
1404 if (*v == ':') {
1405 m++;
1406 *m = 0;
1407 }
1408 }
1409
1410 /* Set up Dest MAC */
1411 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1412 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1413
1414 sprintf(pg_result, "OK: dstmac");
1415 return count;
1416 }
1417 if (!strcmp(name, "src_mac")) {
1418 char *v = valstr;
1419 unsigned char *m = pkt_dev->src_mac;
1420
1421 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1422 if (len < 0) {
1423 return len;
1424 }
1425 memset(valstr, 0, sizeof(valstr));
1426 if (copy_from_user(valstr, &user_buffer[i], len))
1427 return -EFAULT;
1428 i += len;
1429
1430 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1431 if (*v >= '0' && *v <= '9') {
1432 *m *= 16;
1433 *m += *v - '0';
1434 }
1435 if (*v >= 'A' && *v <= 'F') {
1436 *m *= 16;
1437 *m += *v - 'A' + 10;
1438 }
1439 if (*v >= 'a' && *v <= 'f') {
1440 *m *= 16;
1441 *m += *v - 'a' + 10;
1442 }
1443 if (*v == ':') {
1444 m++;
1445 *m = 0;
1446 }
1447 }
1448
1449 sprintf(pg_result, "OK: srcmac");
1450 return count;
1451 }
1452
1453 if (!strcmp(name, "clear_counters")) {
1454 pktgen_clear_counters(pkt_dev);
1455 sprintf(pg_result, "OK: Clearing counters.\n");
1456 return count;
1457 }
1458
1459 if (!strcmp(name, "flows")) {
1460 len = num_arg(&user_buffer[i], 10, &value);
1461 if (len < 0) {
1462 return len;
1463 }
1464 i += len;
1465 if (value > MAX_CFLOWS)
1466 value = MAX_CFLOWS;
1467
1468 pkt_dev->cflows = value;
1469 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1470 return count;
1471 }
1472
1473 if (!strcmp(name, "flowlen")) {
1474 len = num_arg(&user_buffer[i], 10, &value);
1475 if (len < 0) {
1476 return len;
1477 }
1478 i += len;
1479 pkt_dev->lflow = value;
1480 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1481 return count;
1482 }
1483
1484 if (!strcmp(name, "mpls")) {
1485 unsigned n, offset;
1486 len = get_labels(&user_buffer[i], pkt_dev);
1487 if (len < 0) { return len; }
1488 i += len;
1489 offset = sprintf(pg_result, "OK: mpls=");
1490 for (n = 0; n < pkt_dev->nr_labels; n++)
1491 offset += sprintf(pg_result + offset,
1492 "%08x%s", ntohl(pkt_dev->labels[n]),
1493 n == pkt_dev->nr_labels-1 ? "" : ",");
1494
1495 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1496 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1497 pkt_dev->svlan_id = 0xffff;
1498
1499 if (debug)
1500 printk("pktgen: VLAN/SVLAN auto turned off\n");
1501 }
1502 return count;
1503 }
1504
1505 if (!strcmp(name, "vlan_id")) {
1506 len = num_arg(&user_buffer[i], 4, &value);
1507 if (len < 0) {
1508 return len;
1509 }
1510 i += len;
1511 if (value <= 4095) {
1512 pkt_dev->vlan_id = value; /* turn on VLAN */
1513
1514 if (debug)
1515 printk("pktgen: VLAN turned on\n");
1516
1517 if (debug && pkt_dev->nr_labels)
1518 printk("pktgen: MPLS auto turned off\n");
1519
1520 pkt_dev->nr_labels = 0; /* turn off MPLS */
1521 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1522 } else {
1523 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1524 pkt_dev->svlan_id = 0xffff;
1525
1526 if (debug)
1527 printk("pktgen: VLAN/SVLAN turned off\n");
1528 }
1529 return count;
1530 }
1531
1532 if (!strcmp(name, "vlan_p")) {
1533 len = num_arg(&user_buffer[i], 1, &value);
1534 if (len < 0) {
1535 return len;
1536 }
1537 i += len;
1538 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1539 pkt_dev->vlan_p = value;
1540 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1541 } else {
1542 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1543 }
1544 return count;
1545 }
1546
1547 if (!strcmp(name, "vlan_cfi")) {
1548 len = num_arg(&user_buffer[i], 1, &value);
1549 if (len < 0) {
1550 return len;
1551 }
1552 i += len;
1553 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1554 pkt_dev->vlan_cfi = value;
1555 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1556 } else {
1557 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1558 }
1559 return count;
1560 }
1561
1562 if (!strcmp(name, "svlan_id")) {
1563 len = num_arg(&user_buffer[i], 4, &value);
1564 if (len < 0) {
1565 return len;
1566 }
1567 i += len;
1568 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1569 pkt_dev->svlan_id = value; /* turn on SVLAN */
1570
1571 if (debug)
1572 printk("pktgen: SVLAN turned on\n");
1573
1574 if (debug && pkt_dev->nr_labels)
1575 printk("pktgen: MPLS auto turned off\n");
1576
1577 pkt_dev->nr_labels = 0; /* turn off MPLS */
1578 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1579 } else {
1580 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1581 pkt_dev->svlan_id = 0xffff;
1582
1583 if (debug)
1584 printk("pktgen: VLAN/SVLAN turned off\n");
1585 }
1586 return count;
1587 }
1588
1589 if (!strcmp(name, "svlan_p")) {
1590 len = num_arg(&user_buffer[i], 1, &value);
1591 if (len < 0) {
1592 return len;
1593 }
1594 i += len;
1595 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1596 pkt_dev->svlan_p = value;
1597 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1598 } else {
1599 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1600 }
1601 return count;
1602 }
1603
1604 if (!strcmp(name, "svlan_cfi")) {
1605 len = num_arg(&user_buffer[i], 1, &value);
1606 if (len < 0) {
1607 return len;
1608 }
1609 i += len;
1610 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1611 pkt_dev->svlan_cfi = value;
1612 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1613 } else {
1614 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1615 }
1616 return count;
1617 }
1618
1619 if (!strcmp(name, "tos")) {
1620 __u32 tmp_value = 0;
1621 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1622 if (len < 0) {
1623 return len;
1624 }
1625 i += len;
1626 if (len == 2) {
1627 pkt_dev->tos = tmp_value;
1628 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1629 } else {
1630 sprintf(pg_result, "ERROR: tos must be 00-ff");
1631 }
1632 return count;
1633 }
1634
1635 if (!strcmp(name, "traffic_class")) {
1636 __u32 tmp_value = 0;
1637 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1638 if (len < 0) {
1639 return len;
1640 }
1641 i += len;
1642 if (len == 2) {
1643 pkt_dev->traffic_class = tmp_value;
1644 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1645 } else {
1646 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1647 }
1648 return count;
1649 }
1650
1651 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1652 return -EINVAL;
1653 }
1654
1655 static int pktgen_if_open(struct inode *inode, struct file *file)
1656 {
1657 return single_open(file, pktgen_if_show, PDE(inode)->data);
1658 }
1659
1660 static const struct file_operations pktgen_if_fops = {
1661 .owner = THIS_MODULE,
1662 .open = pktgen_if_open,
1663 .read = seq_read,
1664 .llseek = seq_lseek,
1665 .write = pktgen_if_write,
1666 .release = single_release,
1667 };
1668
1669 static int pktgen_thread_show(struct seq_file *seq, void *v)
1670 {
1671 struct pktgen_thread *t = seq->private;
1672 struct pktgen_dev *pkt_dev;
1673
1674 BUG_ON(!t);
1675
1676 seq_printf(seq, "Name: %s max_before_softirq: %d\n",
1677 t->tsk->comm, t->max_before_softirq);
1678
1679 seq_printf(seq, "Running: ");
1680
1681 if_lock(t);
1682 list_for_each_entry(pkt_dev, &t->if_list, list)
1683 if (pkt_dev->running)
1684 seq_printf(seq, "%s ", pkt_dev->odev->name);
1685
1686 seq_printf(seq, "\nStopped: ");
1687
1688 list_for_each_entry(pkt_dev, &t->if_list, list)
1689 if (!pkt_dev->running)
1690 seq_printf(seq, "%s ", pkt_dev->odev->name);
1691
1692 if (t->result[0])
1693 seq_printf(seq, "\nResult: %s\n", t->result);
1694 else
1695 seq_printf(seq, "\nResult: NA\n");
1696
1697 if_unlock(t);
1698
1699 return 0;
1700 }
1701
1702 static ssize_t pktgen_thread_write(struct file *file,
1703 const char __user * user_buffer,
1704 size_t count, loff_t * offset)
1705 {
1706 struct seq_file *seq = (struct seq_file *)file->private_data;
1707 struct pktgen_thread *t = seq->private;
1708 int i = 0, max, len, ret;
1709 char name[40];
1710 char *pg_result;
1711 unsigned long value = 0;
1712
1713 if (count < 1) {
1714 // sprintf(pg_result, "Wrong command format");
1715 return -EINVAL;
1716 }
1717
1718 max = count - i;
1719 len = count_trail_chars(&user_buffer[i], max);
1720 if (len < 0)
1721 return len;
1722
1723 i += len;
1724
1725 /* Read variable name */
1726
1727 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1728 if (len < 0)
1729 return len;
1730
1731 memset(name, 0, sizeof(name));
1732 if (copy_from_user(name, &user_buffer[i], len))
1733 return -EFAULT;
1734 i += len;
1735
1736 max = count - i;
1737 len = count_trail_chars(&user_buffer[i], max);
1738 if (len < 0)
1739 return len;
1740
1741 i += len;
1742
1743 if (debug)
1744 printk("pktgen: t=%s, count=%lu\n", name, (unsigned long)count);
1745
1746 if (!t) {
1747 printk("pktgen: ERROR: No thread\n");
1748 ret = -EINVAL;
1749 goto out;
1750 }
1751
1752 pg_result = &(t->result[0]);
1753
1754 if (!strcmp(name, "add_device")) {
1755 char f[32];
1756 memset(f, 0, 32);
1757 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1758 if (len < 0) {
1759 ret = len;
1760 goto out;
1761 }
1762 if (copy_from_user(f, &user_buffer[i], len))
1763 return -EFAULT;
1764 i += len;
1765 mutex_lock(&pktgen_thread_lock);
1766 pktgen_add_device(t, f);
1767 mutex_unlock(&pktgen_thread_lock);
1768 ret = count;
1769 sprintf(pg_result, "OK: add_device=%s", f);
1770 goto out;
1771 }
1772
1773 if (!strcmp(name, "rem_device_all")) {
1774 mutex_lock(&pktgen_thread_lock);
1775 t->control |= T_REMDEVALL;
1776 mutex_unlock(&pktgen_thread_lock);
1777 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1778 ret = count;
1779 sprintf(pg_result, "OK: rem_device_all");
1780 goto out;
1781 }
1782
1783 if (!strcmp(name, "max_before_softirq")) {
1784 len = num_arg(&user_buffer[i], 10, &value);
1785 mutex_lock(&pktgen_thread_lock);
1786 t->max_before_softirq = value;
1787 mutex_unlock(&pktgen_thread_lock);
1788 ret = count;
1789 sprintf(pg_result, "OK: max_before_softirq=%lu", value);
1790 goto out;
1791 }
1792
1793 ret = -EINVAL;
1794 out:
1795 return ret;
1796 }
1797
1798 static int pktgen_thread_open(struct inode *inode, struct file *file)
1799 {
1800 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1801 }
1802
1803 static const struct file_operations pktgen_thread_fops = {
1804 .owner = THIS_MODULE,
1805 .open = pktgen_thread_open,
1806 .read = seq_read,
1807 .llseek = seq_lseek,
1808 .write = pktgen_thread_write,
1809 .release = single_release,
1810 };
1811
1812 /* Think find or remove for NN */
1813 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1814 {
1815 struct pktgen_thread *t;
1816 struct pktgen_dev *pkt_dev = NULL;
1817
1818 list_for_each_entry(t, &pktgen_threads, th_list) {
1819 pkt_dev = pktgen_find_dev(t, ifname);
1820 if (pkt_dev) {
1821 if (remove) {
1822 if_lock(t);
1823 pkt_dev->removal_mark = 1;
1824 t->control |= T_REMDEV;
1825 if_unlock(t);
1826 }
1827 break;
1828 }
1829 }
1830 return pkt_dev;
1831 }
1832
1833 /*
1834 * mark a device for removal
1835 */
1836 static void pktgen_mark_device(const char *ifname)
1837 {
1838 struct pktgen_dev *pkt_dev = NULL;
1839 const int max_tries = 10, msec_per_try = 125;
1840 int i = 0;
1841
1842 mutex_lock(&pktgen_thread_lock);
1843 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname);
1844
1845 while (1) {
1846
1847 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1848 if (pkt_dev == NULL)
1849 break; /* success */
1850
1851 mutex_unlock(&pktgen_thread_lock);
1852 pr_debug("pktgen: pktgen_mark_device waiting for %s "
1853 "to disappear....\n", ifname);
1854 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1855 mutex_lock(&pktgen_thread_lock);
1856
1857 if (++i >= max_tries) {
1858 printk("pktgen_mark_device: timed out after waiting "
1859 "%d msec for device %s to be removed\n",
1860 msec_per_try * i, ifname);
1861 break;
1862 }
1863
1864 }
1865
1866 mutex_unlock(&pktgen_thread_lock);
1867 }
1868
1869 static void pktgen_change_name(struct net_device *dev)
1870 {
1871 struct pktgen_thread *t;
1872
1873 list_for_each_entry(t, &pktgen_threads, th_list) {
1874 struct pktgen_dev *pkt_dev;
1875
1876 list_for_each_entry(pkt_dev, &t->if_list, list) {
1877 if (pkt_dev->odev != dev)
1878 continue;
1879
1880 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1881
1882 pkt_dev->entry = create_proc_entry(dev->name, 0600,
1883 pg_proc_dir);
1884 if (!pkt_dev->entry)
1885 printk(KERN_ERR "pktgen: can't move proc "
1886 " entry for '%s'\n", dev->name);
1887 break;
1888 }
1889 }
1890 }
1891
1892 static int pktgen_device_event(struct notifier_block *unused,
1893 unsigned long event, void *ptr)
1894 {
1895 struct net_device *dev = ptr;
1896
1897 /* It is OK that we do not hold the group lock right now,
1898 * as we run under the RTNL lock.
1899 */
1900
1901 switch (event) {
1902 case NETDEV_CHANGENAME:
1903 pktgen_change_name(dev);
1904 break;
1905
1906 case NETDEV_UNREGISTER:
1907 pktgen_mark_device(dev->name);
1908 break;
1909 };
1910
1911 return NOTIFY_DONE;
1912 }
1913
1914 /* Associate pktgen_dev with a device. */
1915
1916 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1917 {
1918 struct net_device *odev;
1919 int err;
1920
1921 /* Clean old setups */
1922 if (pkt_dev->odev) {
1923 dev_put(pkt_dev->odev);
1924 pkt_dev->odev = NULL;
1925 }
1926
1927 odev = dev_get_by_name(ifname);
1928 if (!odev) {
1929 printk("pktgen: no such netdevice: \"%s\"\n", ifname);
1930 return -ENODEV;
1931 }
1932
1933 if (odev->type != ARPHRD_ETHER) {
1934 printk("pktgen: not an ethernet device: \"%s\"\n", ifname);
1935 err = -EINVAL;
1936 } else if (!netif_running(odev)) {
1937 printk("pktgen: device is down: \"%s\"\n", ifname);
1938 err = -ENETDOWN;
1939 } else {
1940 pkt_dev->odev = odev;
1941 return 0;
1942 }
1943
1944 dev_put(odev);
1945 return err;
1946 }
1947
1948 /* Read pkt_dev from the interface and set up internal pktgen_dev
1949 * structure to have the right information to create/send packets
1950 */
1951 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
1952 {
1953 if (!pkt_dev->odev) {
1954 printk("pktgen: ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1955 sprintf(pkt_dev->result,
1956 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1957 return;
1958 }
1959
1960 /* Default to the interface's mac if not explicitly set. */
1961
1962 if (is_zero_ether_addr(pkt_dev->src_mac))
1963 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
1964
1965 /* Set up Dest MAC */
1966 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1967
1968 /* Set up pkt size */
1969 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
1970
1971 if (pkt_dev->flags & F_IPV6) {
1972 /*
1973 * Skip this automatic address setting until locks or functions
1974 * gets exported
1975 */
1976
1977 #ifdef NOTNOW
1978 int i, set = 0, err = 1;
1979 struct inet6_dev *idev;
1980
1981 for (i = 0; i < IN6_ADDR_HSIZE; i++)
1982 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
1983 set = 1;
1984 break;
1985 }
1986
1987 if (!set) {
1988
1989 /*
1990 * Use linklevel address if unconfigured.
1991 *
1992 * use ipv6_get_lladdr if/when it's get exported
1993 */
1994
1995 rcu_read_lock();
1996 if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) {
1997 struct inet6_ifaddr *ifp;
1998
1999 read_lock_bh(&idev->lock);
2000 for (ifp = idev->addr_list; ifp;
2001 ifp = ifp->if_next) {
2002 if (ifp->scope == IFA_LINK
2003 && !(ifp->
2004 flags & IFA_F_TENTATIVE)) {
2005 ipv6_addr_copy(&pkt_dev->
2006 cur_in6_saddr,
2007 &ifp->addr);
2008 err = 0;
2009 break;
2010 }
2011 }
2012 read_unlock_bh(&idev->lock);
2013 }
2014 rcu_read_unlock();
2015 if (err)
2016 printk("pktgen: ERROR: IPv6 link address not availble.\n");
2017 }
2018 #endif
2019 } else {
2020 pkt_dev->saddr_min = 0;
2021 pkt_dev->saddr_max = 0;
2022 if (strlen(pkt_dev->src_min) == 0) {
2023
2024 struct in_device *in_dev;
2025
2026 rcu_read_lock();
2027 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2028 if (in_dev) {
2029 if (in_dev->ifa_list) {
2030 pkt_dev->saddr_min =
2031 in_dev->ifa_list->ifa_address;
2032 pkt_dev->saddr_max = pkt_dev->saddr_min;
2033 }
2034 }
2035 rcu_read_unlock();
2036 } else {
2037 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2038 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2039 }
2040
2041 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2042 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2043 }
2044 /* Initialize current values. */
2045 pkt_dev->cur_dst_mac_offset = 0;
2046 pkt_dev->cur_src_mac_offset = 0;
2047 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2048 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2049 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2050 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2051 pkt_dev->nflows = 0;
2052 }
2053
2054 static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us)
2055 {
2056 __u64 start;
2057 __u64 now;
2058
2059 start = now = getCurUs();
2060 printk(KERN_INFO "sleeping for %d\n", (int)(spin_until_us - now));
2061 while (now < spin_until_us) {
2062 /* TODO: optimize sleeping behavior */
2063 if (spin_until_us - now > jiffies_to_usecs(1) + 1)
2064 schedule_timeout_interruptible(1);
2065 else if (spin_until_us - now > 100) {
2066 do_softirq();
2067 if (!pkt_dev->running)
2068 return;
2069 if (need_resched())
2070 schedule();
2071 }
2072
2073 now = getCurUs();
2074 }
2075
2076 pkt_dev->idle_acc += now - start;
2077 }
2078
2079 /* Increment/randomize headers according to flags and current values
2080 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2081 */
2082 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2083 {
2084 __u32 imn;
2085 __u32 imx;
2086 int flow = 0;
2087
2088 if (pkt_dev->cflows) {
2089 flow = random32() % pkt_dev->cflows;
2090
2091 if (pkt_dev->flows[flow].count > pkt_dev->lflow)
2092 pkt_dev->flows[flow].count = 0;
2093 }
2094
2095 /* Deal with source MAC */
2096 if (pkt_dev->src_mac_count > 1) {
2097 __u32 mc;
2098 __u32 tmp;
2099
2100 if (pkt_dev->flags & F_MACSRC_RND)
2101 mc = random32() % pkt_dev->src_mac_count;
2102 else {
2103 mc = pkt_dev->cur_src_mac_offset++;
2104 if (pkt_dev->cur_src_mac_offset >
2105 pkt_dev->src_mac_count)
2106 pkt_dev->cur_src_mac_offset = 0;
2107 }
2108
2109 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2110 pkt_dev->hh[11] = tmp;
2111 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2112 pkt_dev->hh[10] = tmp;
2113 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2114 pkt_dev->hh[9] = tmp;
2115 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2116 pkt_dev->hh[8] = tmp;
2117 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2118 pkt_dev->hh[7] = tmp;
2119 }
2120
2121 /* Deal with Destination MAC */
2122 if (pkt_dev->dst_mac_count > 1) {
2123 __u32 mc;
2124 __u32 tmp;
2125
2126 if (pkt_dev->flags & F_MACDST_RND)
2127 mc = random32() % pkt_dev->dst_mac_count;
2128
2129 else {
2130 mc = pkt_dev->cur_dst_mac_offset++;
2131 if (pkt_dev->cur_dst_mac_offset >
2132 pkt_dev->dst_mac_count) {
2133 pkt_dev->cur_dst_mac_offset = 0;
2134 }
2135 }
2136
2137 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2138 pkt_dev->hh[5] = tmp;
2139 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2140 pkt_dev->hh[4] = tmp;
2141 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2142 pkt_dev->hh[3] = tmp;
2143 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2144 pkt_dev->hh[2] = tmp;
2145 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2146 pkt_dev->hh[1] = tmp;
2147 }
2148
2149 if (pkt_dev->flags & F_MPLS_RND) {
2150 unsigned i;
2151 for (i = 0; i < pkt_dev->nr_labels; i++)
2152 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2153 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2154 ((__force __be32)random32() &
2155 htonl(0x000fffff));
2156 }
2157
2158 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2159 pkt_dev->vlan_id = random32() & (4096-1);
2160 }
2161
2162 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2163 pkt_dev->svlan_id = random32() & (4096 - 1);
2164 }
2165
2166 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2167 if (pkt_dev->flags & F_UDPSRC_RND)
2168 pkt_dev->cur_udp_src = random32() %
2169 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2170 + pkt_dev->udp_src_min;
2171
2172 else {
2173 pkt_dev->cur_udp_src++;
2174 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2175 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2176 }
2177 }
2178
2179 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2180 if (pkt_dev->flags & F_UDPDST_RND) {
2181 pkt_dev->cur_udp_dst = random32() %
2182 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2183 + pkt_dev->udp_dst_min;
2184 } else {
2185 pkt_dev->cur_udp_dst++;
2186 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2187 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2188 }
2189 }
2190
2191 if (!(pkt_dev->flags & F_IPV6)) {
2192
2193 if ((imn = ntohl(pkt_dev->saddr_min)) < (imx =
2194 ntohl(pkt_dev->
2195 saddr_max))) {
2196 __u32 t;
2197 if (pkt_dev->flags & F_IPSRC_RND)
2198 t = random32() % (imx - imn) + imn;
2199 else {
2200 t = ntohl(pkt_dev->cur_saddr);
2201 t++;
2202 if (t > imx) {
2203 t = imn;
2204 }
2205 }
2206 pkt_dev->cur_saddr = htonl(t);
2207 }
2208
2209 if (pkt_dev->cflows && pkt_dev->flows[flow].count != 0) {
2210 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2211 } else {
2212 imn = ntohl(pkt_dev->daddr_min);
2213 imx = ntohl(pkt_dev->daddr_max);
2214 if (imn < imx) {
2215 __u32 t;
2216 __be32 s;
2217 if (pkt_dev->flags & F_IPDST_RND) {
2218
2219 t = random32() % (imx - imn) + imn;
2220 s = htonl(t);
2221
2222 while (LOOPBACK(s) || MULTICAST(s)
2223 || BADCLASS(s) || ZERONET(s)
2224 || LOCAL_MCAST(s)) {
2225 t = random32() % (imx - imn) + imn;
2226 s = htonl(t);
2227 }
2228 pkt_dev->cur_daddr = s;
2229 } else {
2230 t = ntohl(pkt_dev->cur_daddr);
2231 t++;
2232 if (t > imx) {
2233 t = imn;
2234 }
2235 pkt_dev->cur_daddr = htonl(t);
2236 }
2237 }
2238 if (pkt_dev->cflows) {
2239 pkt_dev->flows[flow].cur_daddr =
2240 pkt_dev->cur_daddr;
2241 pkt_dev->nflows++;
2242 }
2243 }
2244 } else { /* IPV6 * */
2245
2246 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2247 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2248 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2249 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2250 else {
2251 int i;
2252
2253 /* Only random destinations yet */
2254
2255 for (i = 0; i < 4; i++) {
2256 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2257 (((__force __be32)random32() |
2258 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2259 pkt_dev->max_in6_daddr.s6_addr32[i]);
2260 }
2261 }
2262 }
2263
2264 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2265 __u32 t;
2266 if (pkt_dev->flags & F_TXSIZE_RND) {
2267 t = random32() %
2268 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2269 + pkt_dev->min_pkt_size;
2270 } else {
2271 t = pkt_dev->cur_pkt_size + 1;
2272 if (t > pkt_dev->max_pkt_size)
2273 t = pkt_dev->min_pkt_size;
2274 }
2275 pkt_dev->cur_pkt_size = t;
2276 }
2277
2278 pkt_dev->flows[flow].count++;
2279 }
2280
2281 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2282 {
2283 unsigned i;
2284 for (i = 0; i < pkt_dev->nr_labels; i++) {
2285 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2286 }
2287 mpls--;
2288 *mpls |= MPLS_STACK_BOTTOM;
2289 }
2290
2291 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2292 unsigned int prio)
2293 {
2294 return htons(id | (cfi << 12) | (prio << 13));
2295 }
2296
2297 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2298 struct pktgen_dev *pkt_dev)
2299 {
2300 struct sk_buff *skb = NULL;
2301 __u8 *eth;
2302 struct udphdr *udph;
2303 int datalen, iplen;
2304 struct iphdr *iph;
2305 struct pktgen_hdr *pgh = NULL;
2306 __be16 protocol = htons(ETH_P_IP);
2307 __be32 *mpls;
2308 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2309 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2310 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2311 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2312
2313
2314 if (pkt_dev->nr_labels)
2315 protocol = htons(ETH_P_MPLS_UC);
2316
2317 if (pkt_dev->vlan_id != 0xffff)
2318 protocol = htons(ETH_P_8021Q);
2319
2320 /* Update any of the values, used when we're incrementing various
2321 * fields.
2322 */
2323 mod_cur_headers(pkt_dev);
2324
2325 datalen = (odev->hard_header_len + 16) & ~0xf;
2326 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + datalen +
2327 pkt_dev->nr_labels*sizeof(u32) +
2328 VLAN_TAG_SIZE(pkt_dev) + SVLAN_TAG_SIZE(pkt_dev),
2329 GFP_ATOMIC);
2330 if (!skb) {
2331 sprintf(pkt_dev->result, "No memory");
2332 return NULL;
2333 }
2334
2335 skb_reserve(skb, datalen);
2336
2337 /* Reserve for ethernet and IP header */
2338 eth = (__u8 *) skb_push(skb, 14);
2339 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2340 if (pkt_dev->nr_labels)
2341 mpls_push(mpls, pkt_dev);
2342
2343 if (pkt_dev->vlan_id != 0xffff) {
2344 if (pkt_dev->svlan_id != 0xffff) {
2345 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2346 *svlan_tci = build_tci(pkt_dev->svlan_id,
2347 pkt_dev->svlan_cfi,
2348 pkt_dev->svlan_p);
2349 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2350 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2351 }
2352 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2353 *vlan_tci = build_tci(pkt_dev->vlan_id,
2354 pkt_dev->vlan_cfi,
2355 pkt_dev->vlan_p);
2356 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2357 *vlan_encapsulated_proto = htons(ETH_P_IP);
2358 }
2359
2360 iph = (struct iphdr *)skb_put(skb, sizeof(struct iphdr));
2361 udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
2362
2363 memcpy(eth, pkt_dev->hh, 12);
2364 *(__be16 *) & eth[12] = protocol;
2365
2366 /* Eth + IPh + UDPh + mpls */
2367 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2368 pkt_dev->nr_labels*sizeof(u32) - VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev);
2369 if (datalen < sizeof(struct pktgen_hdr))
2370 datalen = sizeof(struct pktgen_hdr);
2371
2372 udph->source = htons(pkt_dev->cur_udp_src);
2373 udph->dest = htons(pkt_dev->cur_udp_dst);
2374 udph->len = htons(datalen + 8); /* DATA + udphdr */
2375 udph->check = 0; /* No checksum */
2376
2377 iph->ihl = 5;
2378 iph->version = 4;
2379 iph->ttl = 32;
2380 iph->tos = pkt_dev->tos;
2381 iph->protocol = IPPROTO_UDP; /* UDP */
2382 iph->saddr = pkt_dev->cur_saddr;
2383 iph->daddr = pkt_dev->cur_daddr;
2384 iph->frag_off = 0;
2385 iplen = 20 + 8 + datalen;
2386 iph->tot_len = htons(iplen);
2387 iph->check = 0;
2388 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2389 skb->protocol = protocol;
2390 skb->mac.raw = ((u8 *) iph) - 14 - pkt_dev->nr_labels*sizeof(u32) -
2391 VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev);
2392 skb->dev = odev;
2393 skb->pkt_type = PACKET_HOST;
2394 skb->nh.raw = (unsigned char *)iph;
2395 skb->h.uh = udph;
2396
2397 if (pkt_dev->nfrags <= 0)
2398 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2399 else {
2400 int frags = pkt_dev->nfrags;
2401 int i;
2402
2403 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2404
2405 if (frags > MAX_SKB_FRAGS)
2406 frags = MAX_SKB_FRAGS;
2407 if (datalen > frags * PAGE_SIZE) {
2408 skb_put(skb, datalen - frags * PAGE_SIZE);
2409 datalen = frags * PAGE_SIZE;
2410 }
2411
2412 i = 0;
2413 while (datalen > 0) {
2414 struct page *page = alloc_pages(GFP_KERNEL, 0);
2415 skb_shinfo(skb)->frags[i].page = page;
2416 skb_shinfo(skb)->frags[i].page_offset = 0;
2417 skb_shinfo(skb)->frags[i].size =
2418 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2419 datalen -= skb_shinfo(skb)->frags[i].size;
2420 skb->len += skb_shinfo(skb)->frags[i].size;
2421 skb->data_len += skb_shinfo(skb)->frags[i].size;
2422 i++;
2423 skb_shinfo(skb)->nr_frags = i;
2424 }
2425
2426 while (i < frags) {
2427 int rem;
2428
2429 if (i == 0)
2430 break;
2431
2432 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2433 if (rem == 0)
2434 break;
2435
2436 skb_shinfo(skb)->frags[i - 1].size -= rem;
2437
2438 skb_shinfo(skb)->frags[i] =
2439 skb_shinfo(skb)->frags[i - 1];
2440 get_page(skb_shinfo(skb)->frags[i].page);
2441 skb_shinfo(skb)->frags[i].page =
2442 skb_shinfo(skb)->frags[i - 1].page;
2443 skb_shinfo(skb)->frags[i].page_offset +=
2444 skb_shinfo(skb)->frags[i - 1].size;
2445 skb_shinfo(skb)->frags[i].size = rem;
2446 i++;
2447 skb_shinfo(skb)->nr_frags = i;
2448 }
2449 }
2450
2451 /* Stamp the time, and sequence number, convert them to network byte order */
2452
2453 if (pgh) {
2454 struct timeval timestamp;
2455
2456 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2457 pgh->seq_num = htonl(pkt_dev->seq_num);
2458
2459 do_gettimeofday(&timestamp);
2460 pgh->tv_sec = htonl(timestamp.tv_sec);
2461 pgh->tv_usec = htonl(timestamp.tv_usec);
2462 }
2463
2464 return skb;
2465 }
2466
2467 /*
2468 * scan_ip6, fmt_ip taken from dietlibc-0.21
2469 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2470 *
2471 * Slightly modified for kernel.
2472 * Should be candidate for net/ipv4/utils.c
2473 * --ro
2474 */
2475
2476 static unsigned int scan_ip6(const char *s, char ip[16])
2477 {
2478 unsigned int i;
2479 unsigned int len = 0;
2480 unsigned long u;
2481 char suffix[16];
2482 unsigned int prefixlen = 0;
2483 unsigned int suffixlen = 0;
2484 __be32 tmp;
2485
2486 for (i = 0; i < 16; i++)
2487 ip[i] = 0;
2488
2489 for (;;) {
2490 if (*s == ':') {
2491 len++;
2492 if (s[1] == ':') { /* Found "::", skip to part 2 */
2493 s += 2;
2494 len++;
2495 break;
2496 }
2497 s++;
2498 }
2499 {
2500 char *tmp;
2501 u = simple_strtoul(s, &tmp, 16);
2502 i = tmp - s;
2503 }
2504
2505 if (!i)
2506 return 0;
2507 if (prefixlen == 12 && s[i] == '.') {
2508
2509 /* the last 4 bytes may be written as IPv4 address */
2510
2511 tmp = in_aton(s);
2512 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2513 return i + len;
2514 }
2515 ip[prefixlen++] = (u >> 8);
2516 ip[prefixlen++] = (u & 255);
2517 s += i;
2518 len += i;
2519 if (prefixlen == 16)
2520 return len;
2521 }
2522
2523 /* part 2, after "::" */
2524 for (;;) {
2525 if (*s == ':') {
2526 if (suffixlen == 0)
2527 break;
2528 s++;
2529 len++;
2530 } else if (suffixlen != 0)
2531 break;
2532 {
2533 char *tmp;
2534 u = simple_strtol(s, &tmp, 16);
2535 i = tmp - s;
2536 }
2537 if (!i) {
2538 if (*s)
2539 len--;
2540 break;
2541 }
2542 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2543 tmp = in_aton(s);
2544 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2545 sizeof(tmp));
2546 suffixlen += 4;
2547 len += strlen(s);
2548 break;
2549 }
2550 suffix[suffixlen++] = (u >> 8);
2551 suffix[suffixlen++] = (u & 255);
2552 s += i;
2553 len += i;
2554 if (prefixlen + suffixlen == 16)
2555 break;
2556 }
2557 for (i = 0; i < suffixlen; i++)
2558 ip[16 - suffixlen + i] = suffix[i];
2559 return len;
2560 }
2561
2562 static char tohex(char hexdigit)
2563 {
2564 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2565 }
2566
2567 static int fmt_xlong(char *s, unsigned int i)
2568 {
2569 char *bak = s;
2570 *s = tohex((i >> 12) & 0xf);
2571 if (s != bak || *s != '0')
2572 ++s;
2573 *s = tohex((i >> 8) & 0xf);
2574 if (s != bak || *s != '0')
2575 ++s;
2576 *s = tohex((i >> 4) & 0xf);
2577 if (s != bak || *s != '0')
2578 ++s;
2579 *s = tohex(i & 0xf);
2580 return s - bak + 1;
2581 }
2582
2583 static unsigned int fmt_ip6(char *s, const char ip[16])
2584 {
2585 unsigned int len;
2586 unsigned int i;
2587 unsigned int temp;
2588 unsigned int compressing;
2589 int j;
2590
2591 len = 0;
2592 compressing = 0;
2593 for (j = 0; j < 16; j += 2) {
2594
2595 #ifdef V4MAPPEDPREFIX
2596 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2597 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2598 temp = strlen(s);
2599 return len + temp;
2600 }
2601 #endif
2602 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2603 (unsigned long)(unsigned char)ip[j + 1];
2604 if (temp == 0) {
2605 if (!compressing) {
2606 compressing = 1;
2607 if (j == 0) {
2608 *s++ = ':';
2609 ++len;
2610 }
2611 }
2612 } else {
2613 if (compressing) {
2614 compressing = 0;
2615 *s++ = ':';
2616 ++len;
2617 }
2618 i = fmt_xlong(s, temp);
2619 len += i;
2620 s += i;
2621 if (j < 14) {
2622 *s++ = ':';
2623 ++len;
2624 }
2625 }
2626 }
2627 if (compressing) {
2628 *s++ = ':';
2629 ++len;
2630 }
2631 *s = 0;
2632 return len;
2633 }
2634
2635 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2636 struct pktgen_dev *pkt_dev)
2637 {
2638 struct sk_buff *skb = NULL;
2639 __u8 *eth;
2640 struct udphdr *udph;
2641 int datalen;
2642 struct ipv6hdr *iph;
2643 struct pktgen_hdr *pgh = NULL;
2644 __be16 protocol = htons(ETH_P_IPV6);
2645 __be32 *mpls;
2646 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2647 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2648 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2649 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2650
2651 if (pkt_dev->nr_labels)
2652 protocol = htons(ETH_P_MPLS_UC);
2653
2654 if (pkt_dev->vlan_id != 0xffff)
2655 protocol = htons(ETH_P_8021Q);
2656
2657 /* Update any of the values, used when we're incrementing various
2658 * fields.
2659 */
2660 mod_cur_headers(pkt_dev);
2661
2662 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16 +
2663 pkt_dev->nr_labels*sizeof(u32) +
2664 VLAN_TAG_SIZE(pkt_dev) + SVLAN_TAG_SIZE(pkt_dev),
2665 GFP_ATOMIC);
2666 if (!skb) {
2667 sprintf(pkt_dev->result, "No memory");
2668 return NULL;
2669 }
2670
2671 skb_reserve(skb, 16);
2672
2673 /* Reserve for ethernet and IP header */
2674 eth = (__u8 *) skb_push(skb, 14);
2675 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2676 if (pkt_dev->nr_labels)
2677 mpls_push(mpls, pkt_dev);
2678
2679 if (pkt_dev->vlan_id != 0xffff) {
2680 if (pkt_dev->svlan_id != 0xffff) {
2681 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2682 *svlan_tci = build_tci(pkt_dev->svlan_id,
2683 pkt_dev->svlan_cfi,
2684 pkt_dev->svlan_p);
2685 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2686 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2687 }
2688 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2689 *vlan_tci = build_tci(pkt_dev->vlan_id,
2690 pkt_dev->vlan_cfi,
2691 pkt_dev->vlan_p);
2692 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2693 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2694 }
2695
2696 iph = (struct ipv6hdr *)skb_put(skb, sizeof(struct ipv6hdr));
2697 udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
2698
2699 memcpy(eth, pkt_dev->hh, 12);
2700 *(__be16 *) & eth[12] = protocol;
2701
2702 /* Eth + IPh + UDPh + mpls */
2703 datalen = pkt_dev->cur_pkt_size - 14 -
2704 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2705 pkt_dev->nr_labels*sizeof(u32) - VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev);
2706
2707 if (datalen < sizeof(struct pktgen_hdr)) {
2708 datalen = sizeof(struct pktgen_hdr);
2709 if (net_ratelimit())
2710 printk(KERN_INFO "pktgen: increased datalen to %d\n",
2711 datalen);
2712 }
2713
2714 udph->source = htons(pkt_dev->cur_udp_src);
2715 udph->dest = htons(pkt_dev->cur_udp_dst);
2716 udph->len = htons(datalen + sizeof(struct udphdr));
2717 udph->check = 0; /* No checksum */
2718
2719 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2720
2721 if (pkt_dev->traffic_class) {
2722 /* Version + traffic class + flow (0) */
2723 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2724 }
2725
2726 iph->hop_limit = 32;
2727
2728 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2729 iph->nexthdr = IPPROTO_UDP;
2730
2731 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2732 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2733
2734 skb->mac.raw = ((u8 *) iph) - 14 - pkt_dev->nr_labels*sizeof(u32) -
2735 VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev);
2736 skb->protocol = protocol;
2737 skb->dev = odev;
2738 skb->pkt_type = PACKET_HOST;
2739 skb->nh.ipv6h = iph;
2740 skb->h.uh = udph;
2741
2742 if (pkt_dev->nfrags <= 0)
2743 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2744 else {
2745 int frags = pkt_dev->nfrags;
2746 int i;
2747
2748 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2749
2750 if (frags > MAX_SKB_FRAGS)
2751 frags = MAX_SKB_FRAGS;
2752 if (datalen > frags * PAGE_SIZE) {
2753 skb_put(skb, datalen - frags * PAGE_SIZE);
2754 datalen = frags * PAGE_SIZE;
2755 }
2756
2757 i = 0;
2758 while (datalen > 0) {
2759 struct page *page = alloc_pages(GFP_KERNEL, 0);
2760 skb_shinfo(skb)->frags[i].page = page;
2761 skb_shinfo(skb)->frags[i].page_offset = 0;
2762 skb_shinfo(skb)->frags[i].size =
2763 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2764 datalen -= skb_shinfo(skb)->frags[i].size;
2765 skb->len += skb_shinfo(skb)->frags[i].size;
2766 skb->data_len += skb_shinfo(skb)->frags[i].size;
2767 i++;
2768 skb_shinfo(skb)->nr_frags = i;
2769 }
2770
2771 while (i < frags) {
2772 int rem;
2773
2774 if (i == 0)
2775 break;
2776
2777 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2778 if (rem == 0)
2779 break;
2780
2781 skb_shinfo(skb)->frags[i - 1].size -= rem;
2782
2783 skb_shinfo(skb)->frags[i] =
2784 skb_shinfo(skb)->frags[i - 1];
2785 get_page(skb_shinfo(skb)->frags[i].page);
2786 skb_shinfo(skb)->frags[i].page =
2787 skb_shinfo(skb)->frags[i - 1].page;
2788 skb_shinfo(skb)->frags[i].page_offset +=
2789 skb_shinfo(skb)->frags[i - 1].size;
2790 skb_shinfo(skb)->frags[i].size = rem;
2791 i++;
2792 skb_shinfo(skb)->nr_frags = i;
2793 }
2794 }
2795
2796 /* Stamp the time, and sequence number, convert them to network byte order */
2797 /* should we update cloned packets too ? */
2798 if (pgh) {
2799 struct timeval timestamp;
2800
2801 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2802 pgh->seq_num = htonl(pkt_dev->seq_num);
2803
2804 do_gettimeofday(&timestamp);
2805 pgh->tv_sec = htonl(timestamp.tv_sec);
2806 pgh->tv_usec = htonl(timestamp.tv_usec);
2807 }
2808 /* pkt_dev->seq_num++; FF: you really mean this? */
2809
2810 return skb;
2811 }
2812
2813 static inline struct sk_buff *fill_packet(struct net_device *odev,
2814 struct pktgen_dev *pkt_dev)
2815 {
2816 if (pkt_dev->flags & F_IPV6)
2817 return fill_packet_ipv6(odev, pkt_dev);
2818 else
2819 return fill_packet_ipv4(odev, pkt_dev);
2820 }
2821
2822 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2823 {
2824 pkt_dev->seq_num = 1;
2825 pkt_dev->idle_acc = 0;
2826 pkt_dev->sofar = 0;
2827 pkt_dev->tx_bytes = 0;
2828 pkt_dev->errors = 0;
2829 }
2830
2831 /* Set up structure for sending pkts, clear counters */
2832
2833 static void pktgen_run(struct pktgen_thread *t)
2834 {
2835 struct pktgen_dev *pkt_dev;
2836 int started = 0;
2837
2838 pr_debug("pktgen: entering pktgen_run. %p\n", t);
2839
2840 if_lock(t);
2841 list_for_each_entry(pkt_dev, &t->if_list, list) {
2842
2843 /*
2844 * setup odev and create initial packet.
2845 */
2846 pktgen_setup_inject(pkt_dev);
2847
2848 if (pkt_dev->odev) {
2849 pktgen_clear_counters(pkt_dev);
2850 pkt_dev->running = 1; /* Cranke yeself! */
2851 pkt_dev->skb = NULL;
2852 pkt_dev->started_at = getCurUs();
2853 pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */
2854 pkt_dev->next_tx_ns = 0;
2855
2856 strcpy(pkt_dev->result, "Starting");
2857 started++;
2858 } else
2859 strcpy(pkt_dev->result, "Error starting");
2860 }
2861 if_unlock(t);
2862 if (started)
2863 t->control &= ~(T_STOP);
2864 }
2865
2866 static void pktgen_stop_all_threads_ifs(void)
2867 {
2868 struct pktgen_thread *t;
2869
2870 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n");
2871
2872 mutex_lock(&pktgen_thread_lock);
2873
2874 list_for_each_entry(t, &pktgen_threads, th_list)
2875 t->control |= T_STOP;
2876
2877 mutex_unlock(&pktgen_thread_lock);
2878 }
2879
2880 static int thread_is_running(struct pktgen_thread *t)
2881 {
2882 struct pktgen_dev *pkt_dev;
2883 int res = 0;
2884
2885 list_for_each_entry(pkt_dev, &t->if_list, list)
2886 if (pkt_dev->running) {
2887 res = 1;
2888 break;
2889 }
2890 return res;
2891 }
2892
2893 static int pktgen_wait_thread_run(struct pktgen_thread *t)
2894 {
2895 if_lock(t);
2896
2897 while (thread_is_running(t)) {
2898
2899 if_unlock(t);
2900
2901 msleep_interruptible(100);
2902
2903 if (signal_pending(current))
2904 goto signal;
2905 if_lock(t);
2906 }
2907 if_unlock(t);
2908 return 1;
2909 signal:
2910 return 0;
2911 }
2912
2913 static int pktgen_wait_all_threads_run(void)
2914 {
2915 struct pktgen_thread *t;
2916 int sig = 1;
2917
2918 mutex_lock(&pktgen_thread_lock);
2919
2920 list_for_each_entry(t, &pktgen_threads, th_list) {
2921 sig = pktgen_wait_thread_run(t);
2922 if (sig == 0)
2923 break;
2924 }
2925
2926 if (sig == 0)
2927 list_for_each_entry(t, &pktgen_threads, th_list)
2928 t->control |= (T_STOP);
2929
2930 mutex_unlock(&pktgen_thread_lock);
2931 return sig;
2932 }
2933
2934 static void pktgen_run_all_threads(void)
2935 {
2936 struct pktgen_thread *t;
2937
2938 pr_debug("pktgen: entering pktgen_run_all_threads.\n");
2939
2940 mutex_lock(&pktgen_thread_lock);
2941
2942 list_for_each_entry(t, &pktgen_threads, th_list)
2943 t->control |= (T_RUN);
2944
2945 mutex_unlock(&pktgen_thread_lock);
2946
2947 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
2948
2949 pktgen_wait_all_threads_run();
2950 }
2951
2952 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
2953 {
2954 __u64 total_us, bps, mbps, pps, idle;
2955 char *p = pkt_dev->result;
2956
2957 total_us = pkt_dev->stopped_at - pkt_dev->started_at;
2958
2959 idle = pkt_dev->idle_acc;
2960
2961 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
2962 (unsigned long long)total_us,
2963 (unsigned long long)(total_us - idle),
2964 (unsigned long long)idle,
2965 (unsigned long long)pkt_dev->sofar,
2966 pkt_dev->cur_pkt_size, nr_frags);
2967
2968 pps = pkt_dev->sofar * USEC_PER_SEC;
2969
2970 while ((total_us >> 32) != 0) {
2971 pps >>= 1;
2972 total_us >>= 1;
2973 }
2974
2975 do_div(pps, total_us);
2976
2977 bps = pps * 8 * pkt_dev->cur_pkt_size;
2978
2979 mbps = bps;
2980 do_div(mbps, 1000000);
2981 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
2982 (unsigned long long)pps,
2983 (unsigned long long)mbps,
2984 (unsigned long long)bps,
2985 (unsigned long long)pkt_dev->errors);
2986 }
2987
2988 /* Set stopped-at timer, remove from running list, do counters & statistics */
2989
2990 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
2991 {
2992 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
2993
2994 if (!pkt_dev->running) {
2995 printk("pktgen: interface: %s is already stopped\n",
2996 pkt_dev->odev->name);
2997 return -EINVAL;
2998 }
2999
3000 pkt_dev->stopped_at = getCurUs();
3001 pkt_dev->running = 0;
3002
3003 show_results(pkt_dev, nr_frags);
3004
3005 return 0;
3006 }
3007
3008 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3009 {
3010 struct pktgen_dev *pkt_dev, *best = NULL;
3011
3012 if_lock(t);
3013
3014 list_for_each_entry(pkt_dev, &t->if_list, list) {
3015 if (!pkt_dev->running)
3016 continue;
3017 if (best == NULL)
3018 best = pkt_dev;
3019 else if (pkt_dev->next_tx_us < best->next_tx_us)
3020 best = pkt_dev;
3021 }
3022 if_unlock(t);
3023 return best;
3024 }
3025
3026 static void pktgen_stop(struct pktgen_thread *t)
3027 {
3028 struct pktgen_dev *pkt_dev;
3029
3030 pr_debug("pktgen: entering pktgen_stop\n");
3031
3032 if_lock(t);
3033
3034 list_for_each_entry(pkt_dev, &t->if_list, list) {
3035 pktgen_stop_device(pkt_dev);
3036 if (pkt_dev->skb)
3037 kfree_skb(pkt_dev->skb);
3038
3039 pkt_dev->skb = NULL;
3040 }
3041
3042 if_unlock(t);
3043 }
3044
3045 /*
3046 * one of our devices needs to be removed - find it
3047 * and remove it
3048 */
3049 static void pktgen_rem_one_if(struct pktgen_thread *t)
3050 {
3051 struct list_head *q, *n;
3052 struct pktgen_dev *cur;
3053
3054 pr_debug("pktgen: entering pktgen_rem_one_if\n");
3055
3056 if_lock(t);
3057
3058 list_for_each_safe(q, n, &t->if_list) {
3059 cur = list_entry(q, struct pktgen_dev, list);
3060
3061 if (!cur->removal_mark)
3062 continue;
3063
3064 if (cur->skb)
3065 kfree_skb(cur->skb);
3066 cur->skb = NULL;
3067
3068 pktgen_remove_device(t, cur);
3069
3070 break;
3071 }
3072
3073 if_unlock(t);
3074 }
3075
3076 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3077 {
3078 struct list_head *q, *n;
3079 struct pktgen_dev *cur;
3080
3081 /* Remove all devices, free mem */
3082
3083 pr_debug("pktgen: entering pktgen_rem_all_ifs\n");
3084 if_lock(t);
3085
3086 list_for_each_safe(q, n, &t->if_list) {
3087 cur = list_entry(q, struct pktgen_dev, list);
3088
3089 if (cur->skb)
3090 kfree_skb(cur->skb);
3091 cur->skb = NULL;
3092
3093 pktgen_remove_device(t, cur);
3094 }
3095
3096 if_unlock(t);
3097 }
3098
3099 static void pktgen_rem_thread(struct pktgen_thread *t)
3100 {
3101 /* Remove from the thread list */
3102
3103 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3104
3105 mutex_lock(&pktgen_thread_lock);
3106
3107 list_del(&t->th_list);
3108
3109 mutex_unlock(&pktgen_thread_lock);
3110 }
3111
3112 static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
3113 {
3114 struct net_device *odev = NULL;
3115 __u64 idle_start = 0;
3116 int ret;
3117
3118 odev = pkt_dev->odev;
3119
3120 if (pkt_dev->delay_us || pkt_dev->delay_ns) {
3121 u64 now;
3122
3123 now = getCurUs();
3124 if (now < pkt_dev->next_tx_us)
3125 spin(pkt_dev, pkt_dev->next_tx_us);
3126
3127 /* This is max DELAY, this has special meaning of
3128 * "never transmit"
3129 */
3130 if (pkt_dev->delay_us == 0x7FFFFFFF) {
3131 pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us;
3132 pkt_dev->next_tx_ns = pkt_dev->delay_ns;
3133 goto out;
3134 }
3135 }
3136
3137 if (netif_queue_stopped(odev) || need_resched()) {
3138 idle_start = getCurUs();
3139
3140 if (!netif_running(odev)) {
3141 pktgen_stop_device(pkt_dev);
3142 if (pkt_dev->skb)
3143 kfree_skb(pkt_dev->skb);
3144 pkt_dev->skb = NULL;
3145 goto out;
3146 }
3147 if (need_resched())
3148 schedule();
3149
3150 pkt_dev->idle_acc += getCurUs() - idle_start;
3151
3152 if (netif_queue_stopped(odev)) {
3153 pkt_dev->next_tx_us = getCurUs(); /* TODO */
3154 pkt_dev->next_tx_ns = 0;
3155 goto out; /* Try the next interface */
3156 }
3157 }
3158
3159 if (pkt_dev->last_ok || !pkt_dev->skb) {
3160 if ((++pkt_dev->clone_count >= pkt_dev->clone_skb)
3161 || (!pkt_dev->skb)) {
3162 /* build a new pkt */
3163 if (pkt_dev->skb)
3164 kfree_skb(pkt_dev->skb);
3165
3166 pkt_dev->skb = fill_packet(odev, pkt_dev);
3167 if (pkt_dev->skb == NULL) {
3168 printk("pktgen: ERROR: couldn't allocate skb in fill_packet.\n");
3169 schedule();
3170 pkt_dev->clone_count--; /* back out increment, OOM */
3171 goto out;
3172 }
3173 pkt_dev->allocated_skbs++;
3174 pkt_dev->clone_count = 0; /* reset counter */
3175 }
3176 }
3177
3178 netif_tx_lock_bh(odev);
3179 if (!netif_queue_stopped(odev)) {
3180
3181 atomic_inc(&(pkt_dev->skb->users));
3182 retry_now:
3183 ret = odev->hard_start_xmit(pkt_dev->skb, odev);
3184 if (likely(ret == NETDEV_TX_OK)) {
3185 pkt_dev->last_ok = 1;
3186 pkt_dev->sofar++;
3187 pkt_dev->seq_num++;
3188 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size;
3189
3190 } else if (ret == NETDEV_TX_LOCKED
3191 && (odev->features & NETIF_F_LLTX)) {
3192 cpu_relax();
3193 goto retry_now;
3194 } else { /* Retry it next time */
3195
3196 atomic_dec(&(pkt_dev->skb->users));
3197
3198 if (debug && net_ratelimit())
3199 printk(KERN_INFO "pktgen: Hard xmit error\n");
3200
3201 pkt_dev->errors++;
3202 pkt_dev->last_ok = 0;
3203 }
3204
3205 pkt_dev->next_tx_us = getCurUs();
3206 pkt_dev->next_tx_ns = 0;
3207
3208 pkt_dev->next_tx_us += pkt_dev->delay_us;
3209 pkt_dev->next_tx_ns += pkt_dev->delay_ns;
3210
3211 if (pkt_dev->next_tx_ns > 1000) {
3212 pkt_dev->next_tx_us++;
3213 pkt_dev->next_tx_ns -= 1000;
3214 }
3215 }
3216
3217 else { /* Retry it next time */
3218 pkt_dev->last_ok = 0;
3219 pkt_dev->next_tx_us = getCurUs(); /* TODO */
3220 pkt_dev->next_tx_ns = 0;
3221 }
3222
3223 netif_tx_unlock_bh(odev);
3224
3225 /* If pkt_dev->count is zero, then run forever */
3226 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3227 if (atomic_read(&(pkt_dev->skb->users)) != 1) {
3228 idle_start = getCurUs();
3229 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3230 if (signal_pending(current)) {
3231 break;
3232 }
3233 schedule();
3234 }
3235 pkt_dev->idle_acc += getCurUs() - idle_start;
3236 }
3237
3238 /* Done with this */
3239 pktgen_stop_device(pkt_dev);
3240 if (pkt_dev->skb)
3241 kfree_skb(pkt_dev->skb);
3242 pkt_dev->skb = NULL;
3243 }
3244 out:;
3245 }
3246
3247 /*
3248 * Main loop of the thread goes here
3249 */
3250
3251 static int pktgen_thread_worker(void *arg)
3252 {
3253 DEFINE_WAIT(wait);
3254 struct pktgen_thread *t = arg;
3255 struct pktgen_dev *pkt_dev = NULL;
3256 int cpu = t->cpu;
3257 u32 max_before_softirq;
3258 u32 tx_since_softirq = 0;
3259
3260 BUG_ON(smp_processor_id() != cpu);
3261
3262 init_waitqueue_head(&t->queue);
3263
3264 t->pid = current->pid;
3265
3266 pr_debug("pktgen: starting pktgen/%d: pid=%d\n", cpu, current->pid);
3267
3268 max_before_softirq = t->max_before_softirq;
3269
3270 set_current_state(TASK_INTERRUPTIBLE);
3271
3272 while (!kthread_should_stop()) {
3273 pkt_dev = next_to_run(t);
3274
3275 if (!pkt_dev &&
3276 (t->control & (T_STOP | T_RUN | T_REMDEVALL | T_REMDEV))
3277 == 0) {
3278 prepare_to_wait(&(t->queue), &wait,
3279 TASK_INTERRUPTIBLE);
3280 schedule_timeout(HZ / 10);
3281 finish_wait(&(t->queue), &wait);
3282 }
3283
3284 __set_current_state(TASK_RUNNING);
3285
3286 if (pkt_dev) {
3287
3288 pktgen_xmit(pkt_dev);
3289
3290 /*
3291 * We like to stay RUNNING but must also give
3292 * others fair share.
3293 */
3294
3295 tx_since_softirq += pkt_dev->last_ok;
3296
3297 if (tx_since_softirq > max_before_softirq) {
3298 if (local_softirq_pending())
3299 do_softirq();
3300 tx_since_softirq = 0;
3301 }
3302 }
3303
3304 if (t->control & T_STOP) {
3305 pktgen_stop(t);
3306 t->control &= ~(T_STOP);
3307 }
3308
3309 if (t->control & T_RUN) {
3310 pktgen_run(t);
3311 t->control &= ~(T_RUN);
3312 }
3313
3314 if (t->control & T_REMDEVALL) {
3315 pktgen_rem_all_ifs(t);
3316 t->control &= ~(T_REMDEVALL);
3317 }
3318
3319 if (t->control & T_REMDEV) {
3320 pktgen_rem_one_if(t);
3321 t->control &= ~(T_REMDEV);
3322 }
3323
3324 try_to_freeze();
3325
3326 set_current_state(TASK_INTERRUPTIBLE);
3327 }
3328
3329 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm);
3330 pktgen_stop(t);
3331
3332 pr_debug("pktgen: %s removing all device\n", t->tsk->comm);
3333 pktgen_rem_all_ifs(t);
3334
3335 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm);
3336 pktgen_rem_thread(t);
3337
3338 return 0;
3339 }
3340
3341 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3342 const char *ifname)
3343 {
3344 struct pktgen_dev *p, *pkt_dev = NULL;
3345 if_lock(t);
3346
3347 list_for_each_entry(p, &t->if_list, list)
3348 if (strncmp(p->odev->name, ifname, IFNAMSIZ) == 0) {
3349 pkt_dev = p;
3350 break;
3351 }
3352
3353 if_unlock(t);
3354 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev);
3355 return pkt_dev;
3356 }
3357
3358 /*
3359 * Adds a dev at front of if_list.
3360 */
3361
3362 static int add_dev_to_thread(struct pktgen_thread *t,
3363 struct pktgen_dev *pkt_dev)
3364 {
3365 int rv = 0;
3366
3367 if_lock(t);
3368
3369 if (pkt_dev->pg_thread) {
3370 printk("pktgen: ERROR: already assigned to a thread.\n");
3371 rv = -EBUSY;
3372 goto out;
3373 }
3374
3375 list_add(&pkt_dev->list, &t->if_list);
3376 pkt_dev->pg_thread = t;
3377 pkt_dev->running = 0;
3378
3379 out:
3380 if_unlock(t);
3381 return rv;
3382 }
3383
3384 /* Called under thread lock */
3385
3386 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3387 {
3388 struct pktgen_dev *pkt_dev;
3389 int err;
3390
3391 /* We don't allow a device to be on several threads */
3392
3393 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3394 if (pkt_dev) {
3395 printk("pktgen: ERROR: interface already used.\n");
3396 return -EBUSY;
3397 }
3398
3399 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
3400 if (!pkt_dev)
3401 return -ENOMEM;
3402
3403 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state));
3404 if (pkt_dev->flows == NULL) {
3405 kfree(pkt_dev);
3406 return -ENOMEM;
3407 }
3408 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3409
3410 pkt_dev->removal_mark = 0;
3411 pkt_dev->min_pkt_size = ETH_ZLEN;
3412 pkt_dev->max_pkt_size = ETH_ZLEN;
3413 pkt_dev->nfrags = 0;
3414 pkt_dev->clone_skb = pg_clone_skb_d;
3415 pkt_dev->delay_us = pg_delay_d / 1000;
3416 pkt_dev->delay_ns = pg_delay_d % 1000;
3417 pkt_dev->count = pg_count_d;
3418 pkt_dev->sofar = 0;
3419 pkt_dev->udp_src_min = 9; /* sink port */
3420 pkt_dev->udp_src_max = 9;
3421 pkt_dev->udp_dst_min = 9;
3422 pkt_dev->udp_dst_max = 9;
3423
3424 pkt_dev->vlan_p = 0;
3425 pkt_dev->vlan_cfi = 0;
3426 pkt_dev->vlan_id = 0xffff;
3427 pkt_dev->svlan_p = 0;
3428 pkt_dev->svlan_cfi = 0;
3429 pkt_dev->svlan_id = 0xffff;
3430
3431 err = pktgen_setup_dev(pkt_dev, ifname);
3432 if (err)
3433 goto out1;
3434
3435 pkt_dev->entry = create_proc_entry(ifname, 0600, pg_proc_dir);
3436 if (!pkt_dev->entry) {
3437 printk("pktgen: cannot create %s/%s procfs entry.\n",
3438 PG_PROC_DIR, ifname);
3439 err = -EINVAL;
3440 goto out2;
3441 }
3442 pkt_dev->entry->proc_fops = &pktgen_if_fops;
3443 pkt_dev->entry->data = pkt_dev;
3444
3445 return add_dev_to_thread(t, pkt_dev);
3446 out2:
3447 dev_put(pkt_dev->odev);
3448 out1:
3449 if (pkt_dev->flows)
3450 vfree(pkt_dev->flows);
3451 kfree(pkt_dev);
3452 return err;
3453 }
3454
3455 static int __init pktgen_create_thread(int cpu)
3456 {
3457 struct pktgen_thread *t;
3458 struct proc_dir_entry *pe;
3459 struct task_struct *p;
3460
3461 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL);
3462 if (!t) {
3463 printk("pktgen: ERROR: out of memory, can't create new thread.\n");
3464 return -ENOMEM;
3465 }
3466
3467 spin_lock_init(&t->if_lock);
3468 t->cpu = cpu;
3469
3470 INIT_LIST_HEAD(&t->if_list);
3471
3472 list_add_tail(&t->th_list, &pktgen_threads);
3473
3474 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu);
3475 if (IS_ERR(p)) {
3476 printk("pktgen: kernel_thread() failed for cpu %d\n", t->cpu);
3477 list_del(&t->th_list);
3478 kfree(t);
3479 return PTR_ERR(p);
3480 }
3481 kthread_bind(p, cpu);
3482 t->tsk = p;
3483
3484 pe = create_proc_entry(t->tsk->comm, 0600, pg_proc_dir);
3485 if (!pe) {
3486 printk("pktgen: cannot create %s/%s procfs entry.\n",
3487 PG_PROC_DIR, t->tsk->comm);
3488 kthread_stop(p);
3489 list_del(&t->th_list);
3490 kfree(t);
3491 return -EINVAL;
3492 }
3493
3494 pe->proc_fops = &pktgen_thread_fops;
3495 pe->data = t;
3496
3497 wake_up_process(p);
3498
3499 return 0;
3500 }
3501
3502 /*
3503 * Removes a device from the thread if_list.
3504 */
3505 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3506 struct pktgen_dev *pkt_dev)
3507 {
3508 struct list_head *q, *n;
3509 struct pktgen_dev *p;
3510
3511 list_for_each_safe(q, n, &t->if_list) {
3512 p = list_entry(q, struct pktgen_dev, list);
3513 if (p == pkt_dev)
3514 list_del(&p->list);
3515 }
3516 }
3517
3518 static int pktgen_remove_device(struct pktgen_thread *t,
3519 struct pktgen_dev *pkt_dev)
3520 {
3521
3522 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev);
3523
3524 if (pkt_dev->running) {
3525 printk("pktgen:WARNING: trying to remove a running interface, stopping it now.\n");
3526 pktgen_stop_device(pkt_dev);
3527 }
3528
3529 /* Dis-associate from the interface */
3530
3531 if (pkt_dev->odev) {
3532 dev_put(pkt_dev->odev);
3533 pkt_dev->odev = NULL;
3534 }
3535
3536 /* And update the thread if_list */
3537
3538 _rem_dev_from_if_list(t, pkt_dev);
3539
3540 if (pkt_dev->entry)
3541 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3542
3543 if (pkt_dev->flows)
3544 vfree(pkt_dev->flows);
3545 kfree(pkt_dev);
3546 return 0;
3547 }
3548
3549 static int __init pg_init(void)
3550 {
3551 int cpu;
3552 struct proc_dir_entry *pe;
3553
3554 printk(version);
3555
3556 pg_proc_dir = proc_mkdir(PG_PROC_DIR, proc_net);
3557 if (!pg_proc_dir)
3558 return -ENODEV;
3559 pg_proc_dir->owner = THIS_MODULE;
3560
3561 pe = create_proc_entry(PGCTRL, 0600, pg_proc_dir);
3562 if (pe == NULL) {
3563 printk("pktgen: ERROR: cannot create %s procfs entry.\n",
3564 PGCTRL);
3565 proc_net_remove(PG_PROC_DIR);
3566 return -EINVAL;
3567 }
3568
3569 pe->proc_fops = &pktgen_fops;
3570 pe->data = NULL;
3571
3572 /* Register us to receive netdevice events */
3573 register_netdevice_notifier(&pktgen_notifier_block);
3574
3575 for_each_online_cpu(cpu) {
3576 int err;
3577
3578 err = pktgen_create_thread(cpu);
3579 if (err)
3580 printk("pktgen: WARNING: Cannot create thread for cpu %d (%d)\n",
3581 cpu, err);
3582 }
3583
3584 if (list_empty(&pktgen_threads)) {
3585 printk("pktgen: ERROR: Initialization failed for all threads\n");
3586 unregister_netdevice_notifier(&pktgen_notifier_block);
3587 remove_proc_entry(PGCTRL, pg_proc_dir);
3588 proc_net_remove(PG_PROC_DIR);
3589 return -ENODEV;
3590 }
3591
3592 return 0;
3593 }
3594
3595 static void __exit pg_cleanup(void)
3596 {
3597 struct pktgen_thread *t;
3598 struct list_head *q, *n;
3599 wait_queue_head_t queue;
3600 init_waitqueue_head(&queue);
3601
3602 /* Stop all interfaces & threads */
3603
3604 list_for_each_safe(q, n, &pktgen_threads) {
3605 t = list_entry(q, struct pktgen_thread, th_list);
3606 kthread_stop(t->tsk);
3607 kfree(t);
3608 }
3609
3610 /* Un-register us from receiving netdevice events */
3611 unregister_netdevice_notifier(&pktgen_notifier_block);
3612
3613 /* Clean up proc file system */
3614 remove_proc_entry(PGCTRL, pg_proc_dir);
3615 proc_net_remove(PG_PROC_DIR);
3616 }
3617
3618 module_init(pg_init);
3619 module_exit(pg_cleanup);
3620
3621 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se");
3622 MODULE_DESCRIPTION("Packet Generator tool");
3623 MODULE_LICENSE("GPL");
3624 module_param(pg_count_d, int, 0);
3625 module_param(pg_delay_d, int, 0);
3626 module_param(pg_clone_skb_d, int, 0);
3627 module_param(debug, int, 0);