forked from analogdevicesinc/linux
-
Notifications
You must be signed in to change notification settings - Fork 3
/
pktgen.c
3790 lines (3153 loc) · 90.8 KB
/
pktgen.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* Authors:
* Copyright 2001, 2002 by Robert Olsson <[email protected]>
* Uppsala University and
* Swedish University of Agricultural Sciences
*
* Alexey Kuznetsov <[email protected]>
* Ben Greear <[email protected]>
* Jens Låås <[email protected]>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
*
* A tool for loading the network with preconfigurated packets.
* The tool is implemented as a linux module. Parameters are output
* device, delay (to hard_xmit), number of packets, and whether
* to use multiple SKBs or just the same one.
* pktgen uses the installed interface's output routine.
*
* Additional hacking by:
*
* Improved by ANK. 010120.
* Improved by ANK even more. 010212.
* MAC address typo fixed. 010417 --ro
* Integrated. 020301 --DaveM
* Added multiskb option 020301 --DaveM
* Scaling of results. [email protected]
* Significant re-work of the module:
* * Convert to threaded model to more efficiently be able to transmit
* and receive on multiple interfaces at once.
* * Converted many counters to __u64 to allow longer runs.
* * Allow configuration of ranges, like min/max IP address, MACs,
* and UDP-ports, for both source and destination, and can
* set to use a random distribution or sequentially walk the range.
* * Can now change most values after starting.
* * Place 12-byte packet in UDP payload with magic number,
* sequence number, and timestamp.
* * Add receiver code that detects dropped pkts, re-ordered pkts, and
* latencies (with micro-second) precision.
* * Add IOCTL interface to easily get counters & configuration.
* --Ben Greear <[email protected]>
*
* Renamed multiskb to clone_skb and cleaned up sending core for two distinct
* skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
* as a "fastpath" with a configurable number of clones after alloc's.
* clone_skb=0 means all packets are allocated this also means ranges time
* stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
* clones.
*
* Also moved to /proc/net/pktgen/
* --ro
*
* Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
* mistakes. Also merged in DaveM's patch in the -pre6 patch.
* --Ben Greear <[email protected]>
*
* Integrated to 2.5.x 021029 --Lucio Maciel ([email protected])
*
*
* 021124 Finished major redesign and rewrite for new functionality.
* See Documentation/networking/pktgen.txt for how to use this.
*
* The new operation:
* For each CPU one thread/process is created at start. This process checks
* for running devices in the if_list and sends packets until count is 0 it
* also the thread checks the thread->control which is used for inter-process
* communication. controlling process "posts" operations to the threads this
* way. The if_lock should be possible to remove when add/rem_device is merged
* into this too.
*
* By design there should only be *one* "controlling" process. In practice
* multiple write accesses gives unpredictable result. Understood by "write"
* to /proc gives result code thats should be read be the "writer".
* For practical use this should be no problem.
*
* Note when adding devices to a specific CPU there good idea to also assign
* /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
* --ro
*
* Fix refcount off by one if first packet fails, potential null deref,
* memleak 030710- KJP
*
* First "ranges" functionality for ipv6 030726 --ro
*
* Included flow support. 030802 ANK.
*
* Fixed unaligned access on IA-64 Grant Grundler <[email protected]>
*
* Remove if fix from added Harald Welte <[email protected]> 040419
* ia64 compilation fix from Aron Griffis <[email protected]> 040604
*
* New xmit() return, do_div and misc clean up by Stephen Hemminger
* <[email protected]> 040923
*
* Randy Dunlap fixed u64 printk compiler waring
*
* Remove FCS from BW calculation. Lennert Buytenhek <[email protected]>
* New time handling. Lennert Buytenhek <[email protected]> 041213
*
* Corrections from Nikolai Malykh ([email protected])
* Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
*
* interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <[email protected]>
* 050103
*
* MPLS support by Steven Whitehouse <[email protected]>
*
* 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <[email protected]>
*
* Fixed src_mac command to set source mac of packet to value specified in
* command by Adit Ranadive <[email protected]>
*
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/sys.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/mutex.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/unistd.h>
#include <linux/string.h>
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/capability.h>
#include <linux/hrtimer.h>
#include <linux/freezer.h>
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/list.h>
#include <linux/init.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/inet.h>
#include <linux/inetdevice.h>
#include <linux/rtnetlink.h>
#include <linux/if_arp.h>
#include <linux/if_vlan.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/udp.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/wait.h>
#include <linux/etherdevice.h>
#include <linux/kthread.h>
#include <linux/prefetch.h>
#include <net/net_namespace.h>
#include <net/checksum.h>
#include <net/ipv6.h>
#include <net/addrconf.h>
#ifdef CONFIG_XFRM
#include <net/xfrm.h>
#endif
#include <asm/byteorder.h>
#include <linux/rcupdate.h>
#include <linux/bitops.h>
#include <linux/io.h>
#include <linux/timex.h>
#include <linux/uaccess.h>
#include <asm/dma.h>
#include <asm/div64.h> /* do_div */
#define VERSION "2.74"
#define IP_NAME_SZ 32
#define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
#define MPLS_STACK_BOTTOM htonl(0x00000100)
#define func_enter() pr_debug("entering %s\n", __func__);
/* Device flag bits */
#define F_IPSRC_RND (1<<0) /* IP-Src Random */
#define F_IPDST_RND (1<<1) /* IP-Dst Random */
#define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
#define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
#define F_MACSRC_RND (1<<4) /* MAC-Src Random */
#define F_MACDST_RND (1<<5) /* MAC-Dst Random */
#define F_TXSIZE_RND (1<<6) /* Transmit size is random */
#define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
#define F_MPLS_RND (1<<8) /* Random MPLS labels */
#define F_VID_RND (1<<9) /* Random VLAN ID */
#define F_SVID_RND (1<<10) /* Random SVLAN ID */
#define F_FLOW_SEQ (1<<11) /* Sequential flows */
#define F_IPSEC_ON (1<<12) /* ipsec on for flows */
#define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
#define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
#define F_NODE (1<<15) /* Node memory alloc*/
/* Thread control flag bits */
#define T_STOP (1<<0) /* Stop run */
#define T_RUN (1<<1) /* Start run */
#define T_REMDEVALL (1<<2) /* Remove all devs */
#define T_REMDEV (1<<3) /* Remove one dev */
/* If lock -- can be removed after some work */
#define if_lock(t) spin_lock(&(t->if_lock));
#define if_unlock(t) spin_unlock(&(t->if_lock));
/* Used to help with determining the pkts on receive */
#define PKTGEN_MAGIC 0xbe9be955
#define PG_PROC_DIR "pktgen"
#define PGCTRL "pgctrl"
static struct proc_dir_entry *pg_proc_dir;
#define MAX_CFLOWS 65536
#define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
#define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
struct flow_state {
__be32 cur_daddr;
int count;
#ifdef CONFIG_XFRM
struct xfrm_state *x;
#endif
__u32 flags;
};
/* flow flag bits */
#define F_INIT (1<<0) /* flow has been initialized */
struct pktgen_dev {
/*
* Try to keep frequent/infrequent used vars. separated.
*/
struct proc_dir_entry *entry; /* proc file */
struct pktgen_thread *pg_thread;/* the owner */
struct list_head list; /* chaining in the thread's run-queue */
int running; /* if false, the test will stop */
/* If min != max, then we will either do a linear iteration, or
* we will do a random selection from within the range.
*/
__u32 flags;
int removal_mark; /* non-zero => the device is marked for
* removal by worker thread */
int min_pkt_size; /* = ETH_ZLEN; */
int max_pkt_size; /* = ETH_ZLEN; */
int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
int nfrags;
struct page *page;
u64 delay; /* nano-seconds */
__u64 count; /* Default No packets to send */
__u64 sofar; /* How many pkts we've sent so far */
__u64 tx_bytes; /* How many bytes we've transmitted */
__u64 errors; /* Errors when trying to transmit, */
/* runtime counters relating to clone_skb */
__u64 allocated_skbs;
__u32 clone_count;
int last_ok; /* Was last skb sent?
* Or a failed transmit of some sort?
* This will keep sequence numbers in order
*/
ktime_t next_tx;
ktime_t started_at;
ktime_t stopped_at;
u64 idle_acc; /* nano-seconds */
__u32 seq_num;
int clone_skb; /*
* Use multiple SKBs during packet gen.
* If this number is greater than 1, then
* that many copies of the same packet will be
* sent before a new packet is allocated.
* If you want to send 1024 identical packets
* before creating a new packet,
* set clone_skb to 1024.
*/
char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
struct in6_addr in6_saddr;
struct in6_addr in6_daddr;
struct in6_addr cur_in6_daddr;
struct in6_addr cur_in6_saddr;
/* For ranges */
struct in6_addr min_in6_daddr;
struct in6_addr max_in6_daddr;
struct in6_addr min_in6_saddr;
struct in6_addr max_in6_saddr;
/* If we're doing ranges, random or incremental, then this
* defines the min/max for those ranges.
*/
__be32 saddr_min; /* inclusive, source IP address */
__be32 saddr_max; /* exclusive, source IP address */
__be32 daddr_min; /* inclusive, dest IP address */
__be32 daddr_max; /* exclusive, dest IP address */
__u16 udp_src_min; /* inclusive, source UDP port */
__u16 udp_src_max; /* exclusive, source UDP port */
__u16 udp_dst_min; /* inclusive, dest UDP port */
__u16 udp_dst_max; /* exclusive, dest UDP port */
/* DSCP + ECN */
__u8 tos; /* six MSB of (former) IPv4 TOS
are for dscp codepoint */
__u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
(see RFC 3260, sec. 4) */
/* MPLS */
unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */
__be32 labels[MAX_MPLS_LABELS];
/* VLAN/SVLAN (802.1Q/Q-in-Q) */
__u8 vlan_p;
__u8 vlan_cfi;
__u16 vlan_id; /* 0xffff means no vlan tag */
__u8 svlan_p;
__u8 svlan_cfi;
__u16 svlan_id; /* 0xffff means no svlan tag */
__u32 src_mac_count; /* How many MACs to iterate through */
__u32 dst_mac_count; /* How many MACs to iterate through */
unsigned char dst_mac[ETH_ALEN];
unsigned char src_mac[ETH_ALEN];
__u32 cur_dst_mac_offset;
__u32 cur_src_mac_offset;
__be32 cur_saddr;
__be32 cur_daddr;
__u16 ip_id;
__u16 cur_udp_dst;
__u16 cur_udp_src;
__u16 cur_queue_map;
__u32 cur_pkt_size;
__u32 last_pkt_size;
__u8 hh[14];
/* = {
0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
We fill in SRC address later
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x08, 0x00
};
*/
__u16 pad; /* pad out the hh struct to an even 16 bytes */
struct sk_buff *skb; /* skb we are to transmit next, used for when we
* are transmitting the same one multiple times
*/
struct net_device *odev; /* The out-going device.
* Note that the device should have it's
* pg_info pointer pointing back to this
* device.
* Set when the user specifies the out-going
* device name (not when the inject is
* started as it used to do.)
*/
char odevname[32];
struct flow_state *flows;
unsigned int cflows; /* Concurrent flows (config) */
unsigned int lflow; /* Flow length (config) */
unsigned int nflows; /* accumulated flows (stats) */
unsigned int curfl; /* current sequenced flow (state)*/
u16 queue_map_min;
u16 queue_map_max;
__u32 skb_priority; /* skb priority field */
int node; /* Memory node */
#ifdef CONFIG_XFRM
__u8 ipsmode; /* IPSEC mode (config) */
__u8 ipsproto; /* IPSEC type (config) */
#endif
char result[512];
};
struct pktgen_hdr {
__be32 pgh_magic;
__be32 seq_num;
__be32 tv_sec;
__be32 tv_usec;
};
static bool pktgen_exiting __read_mostly;
struct pktgen_thread {
spinlock_t if_lock; /* for list of devices */
struct list_head if_list; /* All device here */
struct list_head th_list;
struct task_struct *tsk;
char result[512];
/* Field for thread to receive "posted" events terminate,
stop ifs etc. */
u32 control;
int cpu;
wait_queue_head_t queue;
struct completion start_done;
};
#define REMOVE 1
#define FIND 0
static inline ktime_t ktime_now(void)
{
struct timespec ts;
ktime_get_ts(&ts);
return timespec_to_ktime(ts);
}
/* This works even if 32 bit because of careful byte order choice */
static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2)
{
return cmp1.tv64 < cmp2.tv64;
}
static const char version[] =
"Packet Generator for packet performance testing. "
"Version: " VERSION "\n";
static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
const char *ifname, bool exact);
static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
static void pktgen_run_all_threads(void);
static void pktgen_reset_all_threads(void);
static void pktgen_stop_all_threads_ifs(void);
static void pktgen_stop(struct pktgen_thread *t);
static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
static unsigned int scan_ip6(const char *s, char ip[16]);
/* Module parameters, defaults. */
static int pg_count_d __read_mostly = 1000;
static int pg_delay_d __read_mostly;
static int pg_clone_skb_d __read_mostly;
static int debug __read_mostly;
static DEFINE_MUTEX(pktgen_thread_lock);
static LIST_HEAD(pktgen_threads);
static struct notifier_block pktgen_notifier_block = {
.notifier_call = pktgen_device_event,
};
/*
* /proc handling functions
*
*/
static int pgctrl_show(struct seq_file *seq, void *v)
{
seq_puts(seq, version);
return 0;
}
static ssize_t pgctrl_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
int err = 0;
char data[128];
if (!capable(CAP_NET_ADMIN)) {
err = -EPERM;
goto out;
}
if (count > sizeof(data))
count = sizeof(data);
if (copy_from_user(data, buf, count)) {
err = -EFAULT;
goto out;
}
data[count - 1] = 0; /* Make string */
if (!strcmp(data, "stop"))
pktgen_stop_all_threads_ifs();
else if (!strcmp(data, "start"))
pktgen_run_all_threads();
else if (!strcmp(data, "reset"))
pktgen_reset_all_threads();
else
pr_warning("Unknown command: %s\n", data);
err = count;
out:
return err;
}
static int pgctrl_open(struct inode *inode, struct file *file)
{
return single_open(file, pgctrl_show, PDE(inode)->data);
}
static const struct file_operations pktgen_fops = {
.owner = THIS_MODULE,
.open = pgctrl_open,
.read = seq_read,
.llseek = seq_lseek,
.write = pgctrl_write,
.release = single_release,
};
static int pktgen_if_show(struct seq_file *seq, void *v)
{
const struct pktgen_dev *pkt_dev = seq->private;
ktime_t stopped;
u64 idle;
seq_printf(seq,
"Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
(unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
pkt_dev->max_pkt_size);
seq_printf(seq,
" frags: %d delay: %llu clone_skb: %d ifname: %s\n",
pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
pkt_dev->clone_skb, pkt_dev->odevname);
seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
pkt_dev->lflow);
seq_printf(seq,
" queue_map_min: %u queue_map_max: %u\n",
pkt_dev->queue_map_min,
pkt_dev->queue_map_max);
if (pkt_dev->skb_priority)
seq_printf(seq, " skb_priority: %u\n",
pkt_dev->skb_priority);
if (pkt_dev->flags & F_IPV6) {
seq_printf(seq,
" saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
" daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
&pkt_dev->in6_saddr,
&pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
&pkt_dev->in6_daddr,
&pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
} else {
seq_printf(seq,
" dst_min: %s dst_max: %s\n",
pkt_dev->dst_min, pkt_dev->dst_max);
seq_printf(seq,
" src_min: %s src_max: %s\n",
pkt_dev->src_min, pkt_dev->src_max);
}
seq_puts(seq, " src_mac: ");
seq_printf(seq, "%pM ",
is_zero_ether_addr(pkt_dev->src_mac) ?
pkt_dev->odev->dev_addr : pkt_dev->src_mac);
seq_printf(seq, "dst_mac: ");
seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
seq_printf(seq,
" udp_src_min: %d udp_src_max: %d"
" udp_dst_min: %d udp_dst_max: %d\n",
pkt_dev->udp_src_min, pkt_dev->udp_src_max,
pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
seq_printf(seq,
" src_mac_count: %d dst_mac_count: %d\n",
pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
if (pkt_dev->nr_labels) {
unsigned int i;
seq_printf(seq, " mpls: ");
for (i = 0; i < pkt_dev->nr_labels; i++)
seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
i == pkt_dev->nr_labels-1 ? "\n" : ", ");
}
if (pkt_dev->vlan_id != 0xffff)
seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
pkt_dev->vlan_id, pkt_dev->vlan_p,
pkt_dev->vlan_cfi);
if (pkt_dev->svlan_id != 0xffff)
seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
pkt_dev->svlan_id, pkt_dev->svlan_p,
pkt_dev->svlan_cfi);
if (pkt_dev->tos)
seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
if (pkt_dev->traffic_class)
seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
if (pkt_dev->node >= 0)
seq_printf(seq, " node: %d\n", pkt_dev->node);
seq_printf(seq, " Flags: ");
if (pkt_dev->flags & F_IPV6)
seq_printf(seq, "IPV6 ");
if (pkt_dev->flags & F_IPSRC_RND)
seq_printf(seq, "IPSRC_RND ");
if (pkt_dev->flags & F_IPDST_RND)
seq_printf(seq, "IPDST_RND ");
if (pkt_dev->flags & F_TXSIZE_RND)
seq_printf(seq, "TXSIZE_RND ");
if (pkt_dev->flags & F_UDPSRC_RND)
seq_printf(seq, "UDPSRC_RND ");
if (pkt_dev->flags & F_UDPDST_RND)
seq_printf(seq, "UDPDST_RND ");
if (pkt_dev->flags & F_MPLS_RND)
seq_printf(seq, "MPLS_RND ");
if (pkt_dev->flags & F_QUEUE_MAP_RND)
seq_printf(seq, "QUEUE_MAP_RND ");
if (pkt_dev->flags & F_QUEUE_MAP_CPU)
seq_printf(seq, "QUEUE_MAP_CPU ");
if (pkt_dev->cflows) {
if (pkt_dev->flags & F_FLOW_SEQ)
seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
else
seq_printf(seq, "FLOW_RND ");
}
#ifdef CONFIG_XFRM
if (pkt_dev->flags & F_IPSEC_ON)
seq_printf(seq, "IPSEC ");
#endif
if (pkt_dev->flags & F_MACSRC_RND)
seq_printf(seq, "MACSRC_RND ");
if (pkt_dev->flags & F_MACDST_RND)
seq_printf(seq, "MACDST_RND ");
if (pkt_dev->flags & F_VID_RND)
seq_printf(seq, "VID_RND ");
if (pkt_dev->flags & F_SVID_RND)
seq_printf(seq, "SVID_RND ");
if (pkt_dev->flags & F_NODE)
seq_printf(seq, "NODE_ALLOC ");
seq_puts(seq, "\n");
/* not really stopped, more like last-running-at */
stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at;
idle = pkt_dev->idle_acc;
do_div(idle, NSEC_PER_USEC);
seq_printf(seq,
"Current:\n pkts-sofar: %llu errors: %llu\n",
(unsigned long long)pkt_dev->sofar,
(unsigned long long)pkt_dev->errors);
seq_printf(seq,
" started: %lluus stopped: %lluus idle: %lluus\n",
(unsigned long long) ktime_to_us(pkt_dev->started_at),
(unsigned long long) ktime_to_us(stopped),
(unsigned long long) idle);
seq_printf(seq,
" seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
pkt_dev->cur_src_mac_offset);
if (pkt_dev->flags & F_IPV6) {
seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
&pkt_dev->cur_in6_saddr,
&pkt_dev->cur_in6_daddr);
} else
seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
pkt_dev->cur_saddr, pkt_dev->cur_daddr);
seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
if (pkt_dev->result[0])
seq_printf(seq, "Result: %s\n", pkt_dev->result);
else
seq_printf(seq, "Result: Idle\n");
return 0;
}
static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
__u32 *num)
{
int i = 0;
*num = 0;
for (; i < maxlen; i++) {
int value;
char c;
*num <<= 4;
if (get_user(c, &user_buffer[i]))
return -EFAULT;
value = hex_to_bin(c);
if (value >= 0)
*num |= value;
else
break;
}
return i;
}
static int count_trail_chars(const char __user * user_buffer,
unsigned int maxlen)
{
int i;
for (i = 0; i < maxlen; i++) {
char c;
if (get_user(c, &user_buffer[i]))
return -EFAULT;
switch (c) {
case '\"':
case '\n':
case '\r':
case '\t':
case ' ':
case '=':
break;
default:
goto done;
}
}
done:
return i;
}
static long num_arg(const char __user *user_buffer, unsigned long maxlen,
unsigned long *num)
{
int i;
*num = 0;
for (i = 0; i < maxlen; i++) {
char c;
if (get_user(c, &user_buffer[i]))
return -EFAULT;
if ((c >= '0') && (c <= '9')) {
*num *= 10;
*num += c - '0';
} else
break;
}
return i;
}
static int strn_len(const char __user * user_buffer, unsigned int maxlen)
{
int i;
for (i = 0; i < maxlen; i++) {
char c;
if (get_user(c, &user_buffer[i]))
return -EFAULT;
switch (c) {
case '\"':
case '\n':
case '\r':
case '\t':
case ' ':
goto done_str;
break;
default:
break;
}
}
done_str:
return i;
}
static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
{
unsigned int n = 0;
char c;
ssize_t i = 0;
int len;
pkt_dev->nr_labels = 0;
do {
__u32 tmp;
len = hex32_arg(&buffer[i], 8, &tmp);
if (len <= 0)
return len;
pkt_dev->labels[n] = htonl(tmp);
if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
pkt_dev->flags |= F_MPLS_RND;
i += len;
if (get_user(c, &buffer[i]))
return -EFAULT;
i++;
n++;
if (n >= MAX_MPLS_LABELS)
return -E2BIG;
} while (c == ',');
pkt_dev->nr_labels = n;
return i;
}
static ssize_t pktgen_if_write(struct file *file,
const char __user * user_buffer, size_t count,
loff_t * offset)
{
struct seq_file *seq = file->private_data;
struct pktgen_dev *pkt_dev = seq->private;
int i, max, len;
char name[16], valstr[32];
unsigned long value = 0;
char *pg_result = NULL;
int tmp = 0;
char buf[128];
pg_result = &(pkt_dev->result[0]);
if (count < 1) {
pr_warning("wrong command format\n");
return -EINVAL;
}
max = count;
tmp = count_trail_chars(user_buffer, max);
if (tmp < 0) {
pr_warning("illegal format\n");
return tmp;
}
i = tmp;
/* Read variable name */
len = strn_len(&user_buffer[i], sizeof(name) - 1);
if (len < 0)
return len;
memset(name, 0, sizeof(name));
if (copy_from_user(name, &user_buffer[i], len))
return -EFAULT;
i += len;
max = count - i;
len = count_trail_chars(&user_buffer[i], max);
if (len < 0)
return len;
i += len;
if (debug) {
size_t copy = min_t(size_t, count, 1023);
char tb[copy + 1];
if (copy_from_user(tb, user_buffer, copy))
return -EFAULT;
tb[copy] = 0;
printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name,
(unsigned long)count, tb);
}
if (!strcmp(name, "min_pkt_size")) {
len = num_arg(&user_buffer[i], 10, &value);
if (len < 0)
return len;
i += len;
if (value < 14 + 20 + 8)
value = 14 + 20 + 8;
if (value != pkt_dev->min_pkt_size) {
pkt_dev->min_pkt_size = value;
pkt_dev->cur_pkt_size = value;
}
sprintf(pg_result, "OK: min_pkt_size=%u",
pkt_dev->min_pkt_size);
return count;
}
if (!strcmp(name, "max_pkt_size")) {
len = num_arg(&user_buffer[i], 10, &value);
if (len < 0)
return len;
i += len;
if (value < 14 + 20 + 8)
value = 14 + 20 + 8;
if (value != pkt_dev->max_pkt_size) {
pkt_dev->max_pkt_size = value;
pkt_dev->cur_pkt_size = value;
}
sprintf(pg_result, "OK: max_pkt_size=%u",
pkt_dev->max_pkt_size);
return count;
}
/* Shortcut for min = max */
if (!strcmp(name, "pkt_size")) {
len = num_arg(&user_buffer[i], 10, &value);
if (len < 0)
return len;
i += len;
if (value < 14 + 20 + 8)
value = 14 + 20 + 8;
if (value != pkt_dev->min_pkt_size) {
pkt_dev->min_pkt_size = value;
pkt_dev->max_pkt_size = value;
pkt_dev->cur_pkt_size = value;
}
sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
return count;
}
if (!strcmp(name, "debug")) {
len = num_arg(&user_buffer[i], 10, &value);
if (len < 0)
return len;
i += len;
debug = value;
sprintf(pg_result, "OK: debug=%u", debug);
return count;
}
if (!strcmp(name, "frags")) {
len = num_arg(&user_buffer[i], 10, &value);
if (len < 0)
return len;
i += len;
pkt_dev->nfrags = value;
sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
return count;
}
if (!strcmp(name, "delay")) {
len = num_arg(&user_buffer[i], 10, &value);
if (len < 0)
return len;
i += len;
if (value == 0x7FFFFFFF)
pkt_dev->delay = ULLONG_MAX;
else
pkt_dev->delay = (u64)value;
sprintf(pg_result, "OK: delay=%llu",
(unsigned long long) pkt_dev->delay);
return count;
}
if (!strcmp(name, "rate")) {
len = num_arg(&user_buffer[i], 10, &value);
if (len < 0)
return len;
i += len;
if (!value)
return len;
pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
if (debug)
pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
sprintf(pg_result, "OK: rate=%lu", value);
return count;