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[deliverable/linux.git] / net / core / pktgen.c
1 /*
2 * Authors:
3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
4 * Uppsala University and
5 * Swedish University of Agricultural Sciences
6 *
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 * Ben Greear <greearb@candelatech.com>
9 * Jens Låås <jens.laas@data.slu.se>
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 *
16 *
17 * A tool for loading the network with preconfigurated packets.
18 * The tool is implemented as a linux module. Parameters are output
19 * device, delay (to hard_xmit), number of packets, and whether
20 * to use multiple SKBs or just the same one.
21 * pktgen uses the installed interface's output routine.
22 *
23 * Additional hacking by:
24 *
25 * Jens.Laas@data.slu.se
26 * Improved by ANK. 010120.
27 * Improved by ANK even more. 010212.
28 * MAC address typo fixed. 010417 --ro
29 * Integrated. 020301 --DaveM
30 * Added multiskb option 020301 --DaveM
31 * Scaling of results. 020417--sigurdur@linpro.no
32 * Significant re-work of the module:
33 * * Convert to threaded model to more efficiently be able to transmit
34 * and receive on multiple interfaces at once.
35 * * Converted many counters to __u64 to allow longer runs.
36 * * Allow configuration of ranges, like min/max IP address, MACs,
37 * and UDP-ports, for both source and destination, and can
38 * set to use a random distribution or sequentially walk the range.
39 * * Can now change most values after starting.
40 * * Place 12-byte packet in UDP payload with magic number,
41 * sequence number, and timestamp.
42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and
43 * latencies (with micro-second) precision.
44 * * Add IOCTL interface to easily get counters & configuration.
45 * --Ben Greear <greearb@candelatech.com>
46 *
47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
49 * as a "fastpath" with a configurable number of clones after alloc's.
50 * clone_skb=0 means all packets are allocated this also means ranges time
51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
52 * clones.
53 *
54 * Also moved to /proc/net/pktgen/
55 * --ro
56 *
57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
58 * mistakes. Also merged in DaveM's patch in the -pre6 patch.
59 * --Ben Greear <greearb@candelatech.com>
60 *
61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
62 *
63 *
64 * 021124 Finished major redesign and rewrite for new functionality.
65 * See Documentation/networking/pktgen.txt for how to use this.
66 *
67 * The new operation:
68 * For each CPU one thread/process is created at start. This process checks
69 * for running devices in the if_list and sends packets until count is 0 it
70 * also the thread checks the thread->control which is used for inter-process
71 * communication. controlling process "posts" operations to the threads this
72 * way. The if_lock should be possible to remove when add/rem_device is merged
73 * into this too.
74 *
75 * By design there should only be *one* "controlling" process. In practice
76 * multiple write accesses gives unpredictable result. Understood by "write"
77 * to /proc gives result code thats should be read be the "writer".
78 * For practical use this should be no problem.
79 *
80 * Note when adding devices to a specific CPU there good idea to also assign
81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
82 * --ro
83 *
84 * Fix refcount off by one if first packet fails, potential null deref,
85 * memleak 030710- KJP
86 *
87 * First "ranges" functionality for ipv6 030726 --ro
88 *
89 * Included flow support. 030802 ANK.
90 *
91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
92 *
93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
95 *
96 * New xmit() return, do_div and misc clean up by Stephen Hemminger
97 * <shemminger@osdl.org> 040923
98 *
99 * Randy Dunlap fixed u64 printk compiler waring
100 *
101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
103 *
104 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
106 *
107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
108 * 050103
109 *
110 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
111 *
112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
113 *
114 * Fixed src_mac command to set source mac of packet to value specified in
115 * command by Adit Ranadive <adit.262@gmail.com>
116 *
117 */
118 #include <linux/sys.h>
119 #include <linux/types.h>
120 #include <linux/module.h>
121 #include <linux/moduleparam.h>
122 #include <linux/kernel.h>
123 #include <linux/mutex.h>
124 #include <linux/sched.h>
125 #include <linux/slab.h>
126 #include <linux/vmalloc.h>
127 #include <linux/unistd.h>
128 #include <linux/string.h>
129 #include <linux/ptrace.h>
130 #include <linux/errno.h>
131 #include <linux/ioport.h>
132 #include <linux/interrupt.h>
133 #include <linux/capability.h>
134 #include <linux/hrtimer.h>
135 #include <linux/freezer.h>
136 #include <linux/delay.h>
137 #include <linux/timer.h>
138 #include <linux/list.h>
139 #include <linux/init.h>
140 #include <linux/skbuff.h>
141 #include <linux/netdevice.h>
142 #include <linux/inet.h>
143 #include <linux/inetdevice.h>
144 #include <linux/rtnetlink.h>
145 #include <linux/if_arp.h>
146 #include <linux/if_vlan.h>
147 #include <linux/in.h>
148 #include <linux/ip.h>
149 #include <linux/ipv6.h>
150 #include <linux/udp.h>
151 #include <linux/proc_fs.h>
152 #include <linux/seq_file.h>
153 #include <linux/wait.h>
154 #include <linux/etherdevice.h>
155 #include <linux/kthread.h>
156 #include <net/net_namespace.h>
157 #include <net/checksum.h>
158 #include <net/ipv6.h>
159 #include <net/addrconf.h>
160 #ifdef CONFIG_XFRM
161 #include <net/xfrm.h>
162 #endif
163 #include <asm/byteorder.h>
164 #include <linux/rcupdate.h>
165 #include <linux/bitops.h>
166 #include <linux/io.h>
167 #include <linux/timex.h>
168 #include <linux/uaccess.h>
169 #include <asm/dma.h>
170 #include <asm/div64.h> /* do_div */
171
172 #define VERSION "2.72"
173 #define IP_NAME_SZ 32
174 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
175 #define MPLS_STACK_BOTTOM htonl(0x00000100)
176
177 /* Device flag bits */
178 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
179 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
180 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
181 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
182 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
183 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
184 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
185 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
186 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
187 #define F_VID_RND (1<<9) /* Random VLAN ID */
188 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
189 #define F_FLOW_SEQ (1<<11) /* Sequential flows */
190 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */
191 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
192 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
193
194 /* Thread control flag bits */
195 #define T_STOP (1<<0) /* Stop run */
196 #define T_RUN (1<<1) /* Start run */
197 #define T_REMDEVALL (1<<2) /* Remove all devs */
198 #define T_REMDEV (1<<3) /* Remove one dev */
199
200 /* If lock -- can be removed after some work */
201 #define if_lock(t) spin_lock(&(t->if_lock));
202 #define if_unlock(t) spin_unlock(&(t->if_lock));
203
204 /* Used to help with determining the pkts on receive */
205 #define PKTGEN_MAGIC 0xbe9be955
206 #define PG_PROC_DIR "pktgen"
207 #define PGCTRL "pgctrl"
208 static struct proc_dir_entry *pg_proc_dir;
209
210 #define MAX_CFLOWS 65536
211
212 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
213 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
214
215 struct flow_state {
216 __be32 cur_daddr;
217 int count;
218 #ifdef CONFIG_XFRM
219 struct xfrm_state *x;
220 #endif
221 __u32 flags;
222 };
223
224 /* flow flag bits */
225 #define F_INIT (1<<0) /* flow has been initialized */
226
227 struct pktgen_dev {
228 /*
229 * Try to keep frequent/infrequent used vars. separated.
230 */
231 struct proc_dir_entry *entry; /* proc file */
232 struct pktgen_thread *pg_thread;/* the owner */
233 struct list_head list; /* chaining in the thread's run-queue */
234
235 int running; /* if false, the test will stop */
236
237 /* If min != max, then we will either do a linear iteration, or
238 * we will do a random selection from within the range.
239 */
240 __u32 flags;
241 int removal_mark; /* non-zero => the device is marked for
242 * removal by worker thread */
243
244 int min_pkt_size; /* = ETH_ZLEN; */
245 int max_pkt_size; /* = ETH_ZLEN; */
246 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
247 int nfrags;
248 u64 delay; /* nano-seconds */
249
250 __u64 count; /* Default No packets to send */
251 __u64 sofar; /* How many pkts we've sent so far */
252 __u64 tx_bytes; /* How many bytes we've transmitted */
253 __u64 errors; /* Errors when trying to transmit,
254 pkts will be re-sent */
255
256 /* runtime counters relating to clone_skb */
257
258 __u64 allocated_skbs;
259 __u32 clone_count;
260 int last_ok; /* Was last skb sent?
261 * Or a failed transmit of some sort?
262 * This will keep sequence numbers in order
263 */
264 ktime_t next_tx;
265 ktime_t started_at;
266 ktime_t stopped_at;
267 u64 idle_acc; /* nano-seconds */
268
269 __u32 seq_num;
270
271 int clone_skb; /*
272 * Use multiple SKBs during packet gen.
273 * If this number is greater than 1, then
274 * that many copies of the same packet will be
275 * sent before a new packet is allocated.
276 * If you want to send 1024 identical packets
277 * before creating a new packet,
278 * set clone_skb to 1024.
279 */
280
281 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
282 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
283 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
284 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
285
286 struct in6_addr in6_saddr;
287 struct in6_addr in6_daddr;
288 struct in6_addr cur_in6_daddr;
289 struct in6_addr cur_in6_saddr;
290 /* For ranges */
291 struct in6_addr min_in6_daddr;
292 struct in6_addr max_in6_daddr;
293 struct in6_addr min_in6_saddr;
294 struct in6_addr max_in6_saddr;
295
296 /* If we're doing ranges, random or incremental, then this
297 * defines the min/max for those ranges.
298 */
299 __be32 saddr_min; /* inclusive, source IP address */
300 __be32 saddr_max; /* exclusive, source IP address */
301 __be32 daddr_min; /* inclusive, dest IP address */
302 __be32 daddr_max; /* exclusive, dest IP address */
303
304 __u16 udp_src_min; /* inclusive, source UDP port */
305 __u16 udp_src_max; /* exclusive, source UDP port */
306 __u16 udp_dst_min; /* inclusive, dest UDP port */
307 __u16 udp_dst_max; /* exclusive, dest UDP port */
308
309 /* DSCP + ECN */
310 __u8 tos; /* six MSB of (former) IPv4 TOS
311 are for dscp codepoint */
312 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
313 (see RFC 3260, sec. 4) */
314
315 /* MPLS */
316 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
317 __be32 labels[MAX_MPLS_LABELS];
318
319 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
320 __u8 vlan_p;
321 __u8 vlan_cfi;
322 __u16 vlan_id; /* 0xffff means no vlan tag */
323
324 __u8 svlan_p;
325 __u8 svlan_cfi;
326 __u16 svlan_id; /* 0xffff means no svlan tag */
327
328 __u32 src_mac_count; /* How many MACs to iterate through */
329 __u32 dst_mac_count; /* How many MACs to iterate through */
330
331 unsigned char dst_mac[ETH_ALEN];
332 unsigned char src_mac[ETH_ALEN];
333
334 __u32 cur_dst_mac_offset;
335 __u32 cur_src_mac_offset;
336 __be32 cur_saddr;
337 __be32 cur_daddr;
338 __u16 cur_udp_dst;
339 __u16 cur_udp_src;
340 __u16 cur_queue_map;
341 __u32 cur_pkt_size;
342
343 __u8 hh[14];
344 /* = {
345 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
346
347 We fill in SRC address later
348 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
349 0x08, 0x00
350 };
351 */
352 __u16 pad; /* pad out the hh struct to an even 16 bytes */
353
354 struct sk_buff *skb; /* skb we are to transmit next, used for when we
355 * are transmitting the same one multiple times
356 */
357 struct net_device *odev; /* The out-going device.
358 * Note that the device should have it's
359 * pg_info pointer pointing back to this
360 * device.
361 * Set when the user specifies the out-going
362 * device name (not when the inject is
363 * started as it used to do.)
364 */
365 struct flow_state *flows;
366 unsigned cflows; /* Concurrent flows (config) */
367 unsigned lflow; /* Flow length (config) */
368 unsigned nflows; /* accumulated flows (stats) */
369 unsigned curfl; /* current sequenced flow (state)*/
370
371 u16 queue_map_min;
372 u16 queue_map_max;
373
374 #ifdef CONFIG_XFRM
375 __u8 ipsmode; /* IPSEC mode (config) */
376 __u8 ipsproto; /* IPSEC type (config) */
377 #endif
378 char result[512];
379 };
380
381 struct pktgen_hdr {
382 __be32 pgh_magic;
383 __be32 seq_num;
384 __be32 tv_sec;
385 __be32 tv_usec;
386 };
387
388 struct pktgen_thread {
389 spinlock_t if_lock; /* for list of devices */
390 struct list_head if_list; /* All device here */
391 struct list_head th_list;
392 struct task_struct *tsk;
393 char result[512];
394
395 /* Field for thread to receive "posted" events terminate,
396 stop ifs etc. */
397
398 u32 control;
399 int cpu;
400
401 wait_queue_head_t queue;
402 struct completion start_done;
403 };
404
405 #define REMOVE 1
406 #define FIND 0
407
408 static inline ktime_t ktime_now(void)
409 {
410 struct timespec ts;
411 ktime_get_ts(&ts);
412
413 return timespec_to_ktime(ts);
414 }
415
416 /* This works even if 32 bit because of careful byte order choice */
417 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2)
418 {
419 return cmp1.tv64 < cmp2.tv64;
420 }
421
422 static const char version[] =
423 "pktgen " VERSION ": Packet Generator for packet performance testing.\n";
424
425 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
426 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
427 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
428 const char *ifname);
429 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
430 static void pktgen_run_all_threads(void);
431 static void pktgen_reset_all_threads(void);
432 static void pktgen_stop_all_threads_ifs(void);
433
434 static void pktgen_stop(struct pktgen_thread *t);
435 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
436
437 static unsigned int scan_ip6(const char *s, char ip[16]);
438 static unsigned int fmt_ip6(char *s, const char ip[16]);
439
440 /* Module parameters, defaults. */
441 static int pg_count_d __read_mostly = 1000;
442 static int pg_delay_d __read_mostly;
443 static int pg_clone_skb_d __read_mostly;
444 static int debug __read_mostly;
445
446 static DEFINE_MUTEX(pktgen_thread_lock);
447 static LIST_HEAD(pktgen_threads);
448
449 static struct notifier_block pktgen_notifier_block = {
450 .notifier_call = pktgen_device_event,
451 };
452
453 /*
454 * /proc handling functions
455 *
456 */
457
458 static int pgctrl_show(struct seq_file *seq, void *v)
459 {
460 seq_puts(seq, version);
461 return 0;
462 }
463
464 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
465 size_t count, loff_t *ppos)
466 {
467 int err = 0;
468 char data[128];
469
470 if (!capable(CAP_NET_ADMIN)) {
471 err = -EPERM;
472 goto out;
473 }
474
475 if (count > sizeof(data))
476 count = sizeof(data);
477
478 if (copy_from_user(data, buf, count)) {
479 err = -EFAULT;
480 goto out;
481 }
482 data[count - 1] = 0; /* Make string */
483
484 if (!strcmp(data, "stop"))
485 pktgen_stop_all_threads_ifs();
486
487 else if (!strcmp(data, "start"))
488 pktgen_run_all_threads();
489
490 else if (!strcmp(data, "reset"))
491 pktgen_reset_all_threads();
492
493 else
494 printk(KERN_WARNING "pktgen: Unknown command: %s\n", data);
495
496 err = count;
497
498 out:
499 return err;
500 }
501
502 static int pgctrl_open(struct inode *inode, struct file *file)
503 {
504 return single_open(file, pgctrl_show, PDE(inode)->data);
505 }
506
507 static const struct file_operations pktgen_fops = {
508 .owner = THIS_MODULE,
509 .open = pgctrl_open,
510 .read = seq_read,
511 .llseek = seq_lseek,
512 .write = pgctrl_write,
513 .release = single_release,
514 };
515
516 static int pktgen_if_show(struct seq_file *seq, void *v)
517 {
518 const struct pktgen_dev *pkt_dev = seq->private;
519 ktime_t stopped;
520 u64 idle;
521
522 seq_printf(seq,
523 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
524 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
525 pkt_dev->max_pkt_size);
526
527 seq_printf(seq,
528 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
529 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
530 pkt_dev->clone_skb, pkt_dev->odev->name);
531
532 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
533 pkt_dev->lflow);
534
535 seq_printf(seq,
536 " queue_map_min: %u queue_map_max: %u\n",
537 pkt_dev->queue_map_min,
538 pkt_dev->queue_map_max);
539
540 if (pkt_dev->flags & F_IPV6) {
541 char b1[128], b2[128], b3[128];
542 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
543 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
544 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
545 seq_printf(seq,
546 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
547 b2, b3);
548
549 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
550 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
551 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
552 seq_printf(seq,
553 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
554 b2, b3);
555
556 } else {
557 seq_printf(seq,
558 " dst_min: %s dst_max: %s\n",
559 pkt_dev->dst_min, pkt_dev->dst_max);
560 seq_printf(seq,
561 " src_min: %s src_max: %s\n",
562 pkt_dev->src_min, pkt_dev->src_max);
563 }
564
565 seq_puts(seq, " src_mac: ");
566
567 seq_printf(seq, "%pM ",
568 is_zero_ether_addr(pkt_dev->src_mac) ?
569 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
570
571 seq_printf(seq, "dst_mac: ");
572 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
573
574 seq_printf(seq,
575 " udp_src_min: %d udp_src_max: %d"
576 " udp_dst_min: %d udp_dst_max: %d\n",
577 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
578 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
579
580 seq_printf(seq,
581 " src_mac_count: %d dst_mac_count: %d\n",
582 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
583
584 if (pkt_dev->nr_labels) {
585 unsigned i;
586 seq_printf(seq, " mpls: ");
587 for (i = 0; i < pkt_dev->nr_labels; i++)
588 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
589 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
590 }
591
592 if (pkt_dev->vlan_id != 0xffff)
593 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
594 pkt_dev->vlan_id, pkt_dev->vlan_p,
595 pkt_dev->vlan_cfi);
596
597 if (pkt_dev->svlan_id != 0xffff)
598 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
599 pkt_dev->svlan_id, pkt_dev->svlan_p,
600 pkt_dev->svlan_cfi);
601
602 if (pkt_dev->tos)
603 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
604
605 if (pkt_dev->traffic_class)
606 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
607
608 seq_printf(seq, " Flags: ");
609
610 if (pkt_dev->flags & F_IPV6)
611 seq_printf(seq, "IPV6 ");
612
613 if (pkt_dev->flags & F_IPSRC_RND)
614 seq_printf(seq, "IPSRC_RND ");
615
616 if (pkt_dev->flags & F_IPDST_RND)
617 seq_printf(seq, "IPDST_RND ");
618
619 if (pkt_dev->flags & F_TXSIZE_RND)
620 seq_printf(seq, "TXSIZE_RND ");
621
622 if (pkt_dev->flags & F_UDPSRC_RND)
623 seq_printf(seq, "UDPSRC_RND ");
624
625 if (pkt_dev->flags & F_UDPDST_RND)
626 seq_printf(seq, "UDPDST_RND ");
627
628 if (pkt_dev->flags & F_MPLS_RND)
629 seq_printf(seq, "MPLS_RND ");
630
631 if (pkt_dev->flags & F_QUEUE_MAP_RND)
632 seq_printf(seq, "QUEUE_MAP_RND ");
633
634 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
635 seq_printf(seq, "QUEUE_MAP_CPU ");
636
637 if (pkt_dev->cflows) {
638 if (pkt_dev->flags & F_FLOW_SEQ)
639 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
640 else
641 seq_printf(seq, "FLOW_RND ");
642 }
643
644 #ifdef CONFIG_XFRM
645 if (pkt_dev->flags & F_IPSEC_ON)
646 seq_printf(seq, "IPSEC ");
647 #endif
648
649 if (pkt_dev->flags & F_MACSRC_RND)
650 seq_printf(seq, "MACSRC_RND ");
651
652 if (pkt_dev->flags & F_MACDST_RND)
653 seq_printf(seq, "MACDST_RND ");
654
655 if (pkt_dev->flags & F_VID_RND)
656 seq_printf(seq, "VID_RND ");
657
658 if (pkt_dev->flags & F_SVID_RND)
659 seq_printf(seq, "SVID_RND ");
660
661 seq_puts(seq, "\n");
662
663 /* not really stopped, more like last-running-at */
664 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at;
665 idle = pkt_dev->idle_acc;
666 do_div(idle, NSEC_PER_USEC);
667
668 seq_printf(seq,
669 "Current:\n pkts-sofar: %llu errors: %llu\n",
670 (unsigned long long)pkt_dev->sofar,
671 (unsigned long long)pkt_dev->errors);
672
673 seq_printf(seq,
674 " started: %lluus stopped: %lluus idle: %lluus\n",
675 (unsigned long long) ktime_to_us(pkt_dev->started_at),
676 (unsigned long long) ktime_to_us(stopped),
677 (unsigned long long) idle);
678
679 seq_printf(seq,
680 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
681 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
682 pkt_dev->cur_src_mac_offset);
683
684 if (pkt_dev->flags & F_IPV6) {
685 char b1[128], b2[128];
686 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
687 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
688 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
689 } else
690 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
691 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
692
693 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
694 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
695
696 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
697
698 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
699
700 if (pkt_dev->result[0])
701 seq_printf(seq, "Result: %s\n", pkt_dev->result);
702 else
703 seq_printf(seq, "Result: Idle\n");
704
705 return 0;
706 }
707
708
709 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
710 __u32 *num)
711 {
712 int i = 0;
713 *num = 0;
714
715 for (; i < maxlen; i++) {
716 char c;
717 *num <<= 4;
718 if (get_user(c, &user_buffer[i]))
719 return -EFAULT;
720 if ((c >= '0') && (c <= '9'))
721 *num |= c - '0';
722 else if ((c >= 'a') && (c <= 'f'))
723 *num |= c - 'a' + 10;
724 else if ((c >= 'A') && (c <= 'F'))
725 *num |= c - 'A' + 10;
726 else
727 break;
728 }
729 return i;
730 }
731
732 static int count_trail_chars(const char __user * user_buffer,
733 unsigned int maxlen)
734 {
735 int i;
736
737 for (i = 0; i < maxlen; i++) {
738 char c;
739 if (get_user(c, &user_buffer[i]))
740 return -EFAULT;
741 switch (c) {
742 case '\"':
743 case '\n':
744 case '\r':
745 case '\t':
746 case ' ':
747 case '=':
748 break;
749 default:
750 goto done;
751 }
752 }
753 done:
754 return i;
755 }
756
757 static unsigned long num_arg(const char __user * user_buffer,
758 unsigned long maxlen, unsigned long *num)
759 {
760 int i = 0;
761 *num = 0;
762
763 for (; i < maxlen; i++) {
764 char c;
765 if (get_user(c, &user_buffer[i]))
766 return -EFAULT;
767 if ((c >= '0') && (c <= '9')) {
768 *num *= 10;
769 *num += c - '0';
770 } else
771 break;
772 }
773 return i;
774 }
775
776 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
777 {
778 int i = 0;
779
780 for (; i < maxlen; i++) {
781 char c;
782 if (get_user(c, &user_buffer[i]))
783 return -EFAULT;
784 switch (c) {
785 case '\"':
786 case '\n':
787 case '\r':
788 case '\t':
789 case ' ':
790 goto done_str;
791 break;
792 default:
793 break;
794 }
795 }
796 done_str:
797 return i;
798 }
799
800 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
801 {
802 unsigned n = 0;
803 char c;
804 ssize_t i = 0;
805 int len;
806
807 pkt_dev->nr_labels = 0;
808 do {
809 __u32 tmp;
810 len = hex32_arg(&buffer[i], 8, &tmp);
811 if (len <= 0)
812 return len;
813 pkt_dev->labels[n] = htonl(tmp);
814 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
815 pkt_dev->flags |= F_MPLS_RND;
816 i += len;
817 if (get_user(c, &buffer[i]))
818 return -EFAULT;
819 i++;
820 n++;
821 if (n >= MAX_MPLS_LABELS)
822 return -E2BIG;
823 } while (c == ',');
824
825 pkt_dev->nr_labels = n;
826 return i;
827 }
828
829 static ssize_t pktgen_if_write(struct file *file,
830 const char __user * user_buffer, size_t count,
831 loff_t * offset)
832 {
833 struct seq_file *seq = (struct seq_file *)file->private_data;
834 struct pktgen_dev *pkt_dev = seq->private;
835 int i = 0, max, len;
836 char name[16], valstr[32];
837 unsigned long value = 0;
838 char *pg_result = NULL;
839 int tmp = 0;
840 char buf[128];
841
842 pg_result = &(pkt_dev->result[0]);
843
844 if (count < 1) {
845 printk(KERN_WARNING "pktgen: wrong command format\n");
846 return -EINVAL;
847 }
848
849 max = count - i;
850 tmp = count_trail_chars(&user_buffer[i], max);
851 if (tmp < 0) {
852 printk(KERN_WARNING "pktgen: illegal format\n");
853 return tmp;
854 }
855 i += tmp;
856
857 /* Read variable name */
858
859 len = strn_len(&user_buffer[i], sizeof(name) - 1);
860 if (len < 0)
861 return len;
862
863 memset(name, 0, sizeof(name));
864 if (copy_from_user(name, &user_buffer[i], len))
865 return -EFAULT;
866 i += len;
867
868 max = count - i;
869 len = count_trail_chars(&user_buffer[i], max);
870 if (len < 0)
871 return len;
872
873 i += len;
874
875 if (debug) {
876 char tb[count + 1];
877 if (copy_from_user(tb, user_buffer, count))
878 return -EFAULT;
879 tb[count] = 0;
880 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name,
881 (unsigned long)count, tb);
882 }
883
884 if (!strcmp(name, "min_pkt_size")) {
885 len = num_arg(&user_buffer[i], 10, &value);
886 if (len < 0)
887 return len;
888
889 i += len;
890 if (value < 14 + 20 + 8)
891 value = 14 + 20 + 8;
892 if (value != pkt_dev->min_pkt_size) {
893 pkt_dev->min_pkt_size = value;
894 pkt_dev->cur_pkt_size = value;
895 }
896 sprintf(pg_result, "OK: min_pkt_size=%u",
897 pkt_dev->min_pkt_size);
898 return count;
899 }
900
901 if (!strcmp(name, "max_pkt_size")) {
902 len = num_arg(&user_buffer[i], 10, &value);
903 if (len < 0)
904 return len;
905
906 i += len;
907 if (value < 14 + 20 + 8)
908 value = 14 + 20 + 8;
909 if (value != pkt_dev->max_pkt_size) {
910 pkt_dev->max_pkt_size = value;
911 pkt_dev->cur_pkt_size = value;
912 }
913 sprintf(pg_result, "OK: max_pkt_size=%u",
914 pkt_dev->max_pkt_size);
915 return count;
916 }
917
918 /* Shortcut for min = max */
919
920 if (!strcmp(name, "pkt_size")) {
921 len = num_arg(&user_buffer[i], 10, &value);
922 if (len < 0)
923 return len;
924
925 i += len;
926 if (value < 14 + 20 + 8)
927 value = 14 + 20 + 8;
928 if (value != pkt_dev->min_pkt_size) {
929 pkt_dev->min_pkt_size = value;
930 pkt_dev->max_pkt_size = value;
931 pkt_dev->cur_pkt_size = value;
932 }
933 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
934 return count;
935 }
936
937 if (!strcmp(name, "debug")) {
938 len = num_arg(&user_buffer[i], 10, &value);
939 if (len < 0)
940 return len;
941
942 i += len;
943 debug = value;
944 sprintf(pg_result, "OK: debug=%u", debug);
945 return count;
946 }
947
948 if (!strcmp(name, "frags")) {
949 len = num_arg(&user_buffer[i], 10, &value);
950 if (len < 0)
951 return len;
952
953 i += len;
954 pkt_dev->nfrags = value;
955 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
956 return count;
957 }
958 if (!strcmp(name, "delay")) {
959 len = num_arg(&user_buffer[i], 10, &value);
960 if (len < 0)
961 return len;
962
963 i += len;
964 if (value == 0x7FFFFFFF)
965 pkt_dev->delay = ULLONG_MAX;
966 else
967 pkt_dev->delay = (u64)value;
968
969 sprintf(pg_result, "OK: delay=%llu",
970 (unsigned long long) pkt_dev->delay);
971 return count;
972 }
973 if (!strcmp(name, "udp_src_min")) {
974 len = num_arg(&user_buffer[i], 10, &value);
975 if (len < 0)
976 return len;
977
978 i += len;
979 if (value != pkt_dev->udp_src_min) {
980 pkt_dev->udp_src_min = value;
981 pkt_dev->cur_udp_src = value;
982 }
983 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
984 return count;
985 }
986 if (!strcmp(name, "udp_dst_min")) {
987 len = num_arg(&user_buffer[i], 10, &value);
988 if (len < 0)
989 return len;
990
991 i += len;
992 if (value != pkt_dev->udp_dst_min) {
993 pkt_dev->udp_dst_min = value;
994 pkt_dev->cur_udp_dst = value;
995 }
996 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
997 return count;
998 }
999 if (!strcmp(name, "udp_src_max")) {
1000 len = num_arg(&user_buffer[i], 10, &value);
1001 if (len < 0)
1002 return len;
1003
1004 i += len;
1005 if (value != pkt_dev->udp_src_max) {
1006 pkt_dev->udp_src_max = value;
1007 pkt_dev->cur_udp_src = value;
1008 }
1009 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1010 return count;
1011 }
1012 if (!strcmp(name, "udp_dst_max")) {
1013 len = num_arg(&user_buffer[i], 10, &value);
1014 if (len < 0)
1015 return len;
1016
1017 i += len;
1018 if (value != pkt_dev->udp_dst_max) {
1019 pkt_dev->udp_dst_max = value;
1020 pkt_dev->cur_udp_dst = value;
1021 }
1022 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1023 return count;
1024 }
1025 if (!strcmp(name, "clone_skb")) {
1026 len = num_arg(&user_buffer[i], 10, &value);
1027 if (len < 0)
1028 return len;
1029
1030 i += len;
1031 pkt_dev->clone_skb = value;
1032
1033 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1034 return count;
1035 }
1036 if (!strcmp(name, "count")) {
1037 len = num_arg(&user_buffer[i], 10, &value);
1038 if (len < 0)
1039 return len;
1040
1041 i += len;
1042 pkt_dev->count = value;
1043 sprintf(pg_result, "OK: count=%llu",
1044 (unsigned long long)pkt_dev->count);
1045 return count;
1046 }
1047 if (!strcmp(name, "src_mac_count")) {
1048 len = num_arg(&user_buffer[i], 10, &value);
1049 if (len < 0)
1050 return len;
1051
1052 i += len;
1053 if (pkt_dev->src_mac_count != value) {
1054 pkt_dev->src_mac_count = value;
1055 pkt_dev->cur_src_mac_offset = 0;
1056 }
1057 sprintf(pg_result, "OK: src_mac_count=%d",
1058 pkt_dev->src_mac_count);
1059 return count;
1060 }
1061 if (!strcmp(name, "dst_mac_count")) {
1062 len = num_arg(&user_buffer[i], 10, &value);
1063 if (len < 0)
1064 return len;
1065
1066 i += len;
1067 if (pkt_dev->dst_mac_count != value) {
1068 pkt_dev->dst_mac_count = value;
1069 pkt_dev->cur_dst_mac_offset = 0;
1070 }
1071 sprintf(pg_result, "OK: dst_mac_count=%d",
1072 pkt_dev->dst_mac_count);
1073 return count;
1074 }
1075 if (!strcmp(name, "flag")) {
1076 char f[32];
1077 memset(f, 0, 32);
1078 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1079 if (len < 0)
1080 return len;
1081
1082 if (copy_from_user(f, &user_buffer[i], len))
1083 return -EFAULT;
1084 i += len;
1085 if (strcmp(f, "IPSRC_RND") == 0)
1086 pkt_dev->flags |= F_IPSRC_RND;
1087
1088 else if (strcmp(f, "!IPSRC_RND") == 0)
1089 pkt_dev->flags &= ~F_IPSRC_RND;
1090
1091 else if (strcmp(f, "TXSIZE_RND") == 0)
1092 pkt_dev->flags |= F_TXSIZE_RND;
1093
1094 else if (strcmp(f, "!TXSIZE_RND") == 0)
1095 pkt_dev->flags &= ~F_TXSIZE_RND;
1096
1097 else if (strcmp(f, "IPDST_RND") == 0)
1098 pkt_dev->flags |= F_IPDST_RND;
1099
1100 else if (strcmp(f, "!IPDST_RND") == 0)
1101 pkt_dev->flags &= ~F_IPDST_RND;
1102
1103 else if (strcmp(f, "UDPSRC_RND") == 0)
1104 pkt_dev->flags |= F_UDPSRC_RND;
1105
1106 else if (strcmp(f, "!UDPSRC_RND") == 0)
1107 pkt_dev->flags &= ~F_UDPSRC_RND;
1108
1109 else if (strcmp(f, "UDPDST_RND") == 0)
1110 pkt_dev->flags |= F_UDPDST_RND;
1111
1112 else if (strcmp(f, "!UDPDST_RND") == 0)
1113 pkt_dev->flags &= ~F_UDPDST_RND;
1114
1115 else if (strcmp(f, "MACSRC_RND") == 0)
1116 pkt_dev->flags |= F_MACSRC_RND;
1117
1118 else if (strcmp(f, "!MACSRC_RND") == 0)
1119 pkt_dev->flags &= ~F_MACSRC_RND;
1120
1121 else if (strcmp(f, "MACDST_RND") == 0)
1122 pkt_dev->flags |= F_MACDST_RND;
1123
1124 else if (strcmp(f, "!MACDST_RND") == 0)
1125 pkt_dev->flags &= ~F_MACDST_RND;
1126
1127 else if (strcmp(f, "MPLS_RND") == 0)
1128 pkt_dev->flags |= F_MPLS_RND;
1129
1130 else if (strcmp(f, "!MPLS_RND") == 0)
1131 pkt_dev->flags &= ~F_MPLS_RND;
1132
1133 else if (strcmp(f, "VID_RND") == 0)
1134 pkt_dev->flags |= F_VID_RND;
1135
1136 else if (strcmp(f, "!VID_RND") == 0)
1137 pkt_dev->flags &= ~F_VID_RND;
1138
1139 else if (strcmp(f, "SVID_RND") == 0)
1140 pkt_dev->flags |= F_SVID_RND;
1141
1142 else if (strcmp(f, "!SVID_RND") == 0)
1143 pkt_dev->flags &= ~F_SVID_RND;
1144
1145 else if (strcmp(f, "FLOW_SEQ") == 0)
1146 pkt_dev->flags |= F_FLOW_SEQ;
1147
1148 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1149 pkt_dev->flags |= F_QUEUE_MAP_RND;
1150
1151 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1152 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1153
1154 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1155 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1156
1157 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1158 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1159 #ifdef CONFIG_XFRM
1160 else if (strcmp(f, "IPSEC") == 0)
1161 pkt_dev->flags |= F_IPSEC_ON;
1162 #endif
1163
1164 else if (strcmp(f, "!IPV6") == 0)
1165 pkt_dev->flags &= ~F_IPV6;
1166
1167 else {
1168 sprintf(pg_result,
1169 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1170 f,
1171 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1172 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC\n");
1173 return count;
1174 }
1175 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1176 return count;
1177 }
1178 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1179 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1180 if (len < 0)
1181 return len;
1182
1183 if (copy_from_user(buf, &user_buffer[i], len))
1184 return -EFAULT;
1185 buf[len] = 0;
1186 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1187 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1188 strncpy(pkt_dev->dst_min, buf, len);
1189 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1190 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1191 }
1192 if (debug)
1193 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1194 pkt_dev->dst_min);
1195 i += len;
1196 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1197 return count;
1198 }
1199 if (!strcmp(name, "dst_max")) {
1200 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1201 if (len < 0)
1202 return len;
1203
1204
1205 if (copy_from_user(buf, &user_buffer[i], len))
1206 return -EFAULT;
1207
1208 buf[len] = 0;
1209 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1210 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1211 strncpy(pkt_dev->dst_max, buf, len);
1212 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1213 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1214 }
1215 if (debug)
1216 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1217 pkt_dev->dst_max);
1218 i += len;
1219 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1220 return count;
1221 }
1222 if (!strcmp(name, "dst6")) {
1223 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1224 if (len < 0)
1225 return len;
1226
1227 pkt_dev->flags |= F_IPV6;
1228
1229 if (copy_from_user(buf, &user_buffer[i], len))
1230 return -EFAULT;
1231 buf[len] = 0;
1232
1233 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1234 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1235
1236 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1237
1238 if (debug)
1239 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1240
1241 i += len;
1242 sprintf(pg_result, "OK: dst6=%s", buf);
1243 return count;
1244 }
1245 if (!strcmp(name, "dst6_min")) {
1246 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1247 if (len < 0)
1248 return len;
1249
1250 pkt_dev->flags |= F_IPV6;
1251
1252 if (copy_from_user(buf, &user_buffer[i], len))
1253 return -EFAULT;
1254 buf[len] = 0;
1255
1256 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1257 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1258
1259 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1260 &pkt_dev->min_in6_daddr);
1261 if (debug)
1262 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1263
1264 i += len;
1265 sprintf(pg_result, "OK: dst6_min=%s", buf);
1266 return count;
1267 }
1268 if (!strcmp(name, "dst6_max")) {
1269 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1270 if (len < 0)
1271 return len;
1272
1273 pkt_dev->flags |= F_IPV6;
1274
1275 if (copy_from_user(buf, &user_buffer[i], len))
1276 return -EFAULT;
1277 buf[len] = 0;
1278
1279 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1280 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1281
1282 if (debug)
1283 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1284
1285 i += len;
1286 sprintf(pg_result, "OK: dst6_max=%s", buf);
1287 return count;
1288 }
1289 if (!strcmp(name, "src6")) {
1290 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1291 if (len < 0)
1292 return len;
1293
1294 pkt_dev->flags |= F_IPV6;
1295
1296 if (copy_from_user(buf, &user_buffer[i], len))
1297 return -EFAULT;
1298 buf[len] = 0;
1299
1300 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1301 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1302
1303 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1304
1305 if (debug)
1306 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1307
1308 i += len;
1309 sprintf(pg_result, "OK: src6=%s", buf);
1310 return count;
1311 }
1312 if (!strcmp(name, "src_min")) {
1313 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1314 if (len < 0)
1315 return len;
1316
1317 if (copy_from_user(buf, &user_buffer[i], len))
1318 return -EFAULT;
1319 buf[len] = 0;
1320 if (strcmp(buf, pkt_dev->src_min) != 0) {
1321 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1322 strncpy(pkt_dev->src_min, buf, len);
1323 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1324 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1325 }
1326 if (debug)
1327 printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1328 pkt_dev->src_min);
1329 i += len;
1330 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1331 return count;
1332 }
1333 if (!strcmp(name, "src_max")) {
1334 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1335 if (len < 0)
1336 return len;
1337
1338 if (copy_from_user(buf, &user_buffer[i], len))
1339 return -EFAULT;
1340 buf[len] = 0;
1341 if (strcmp(buf, pkt_dev->src_max) != 0) {
1342 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1343 strncpy(pkt_dev->src_max, buf, len);
1344 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1345 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1346 }
1347 if (debug)
1348 printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1349 pkt_dev->src_max);
1350 i += len;
1351 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1352 return count;
1353 }
1354 if (!strcmp(name, "dst_mac")) {
1355 char *v = valstr;
1356 unsigned char old_dmac[ETH_ALEN];
1357 unsigned char *m = pkt_dev->dst_mac;
1358 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1359
1360 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1361 if (len < 0)
1362 return len;
1363
1364 memset(valstr, 0, sizeof(valstr));
1365 if (copy_from_user(valstr, &user_buffer[i], len))
1366 return -EFAULT;
1367 i += len;
1368
1369 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1370 if (*v >= '0' && *v <= '9') {
1371 *m *= 16;
1372 *m += *v - '0';
1373 }
1374 if (*v >= 'A' && *v <= 'F') {
1375 *m *= 16;
1376 *m += *v - 'A' + 10;
1377 }
1378 if (*v >= 'a' && *v <= 'f') {
1379 *m *= 16;
1380 *m += *v - 'a' + 10;
1381 }
1382 if (*v == ':') {
1383 m++;
1384 *m = 0;
1385 }
1386 }
1387
1388 /* Set up Dest MAC */
1389 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1390 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1391
1392 sprintf(pg_result, "OK: dstmac");
1393 return count;
1394 }
1395 if (!strcmp(name, "src_mac")) {
1396 char *v = valstr;
1397 unsigned char old_smac[ETH_ALEN];
1398 unsigned char *m = pkt_dev->src_mac;
1399
1400 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN);
1401
1402 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1403 if (len < 0)
1404 return len;
1405
1406 memset(valstr, 0, sizeof(valstr));
1407 if (copy_from_user(valstr, &user_buffer[i], len))
1408 return -EFAULT;
1409 i += len;
1410
1411 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1412 if (*v >= '0' && *v <= '9') {
1413 *m *= 16;
1414 *m += *v - '0';
1415 }
1416 if (*v >= 'A' && *v <= 'F') {
1417 *m *= 16;
1418 *m += *v - 'A' + 10;
1419 }
1420 if (*v >= 'a' && *v <= 'f') {
1421 *m *= 16;
1422 *m += *v - 'a' + 10;
1423 }
1424 if (*v == ':') {
1425 m++;
1426 *m = 0;
1427 }
1428 }
1429
1430 /* Set up Src MAC */
1431 if (compare_ether_addr(old_smac, pkt_dev->src_mac))
1432 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN);
1433
1434 sprintf(pg_result, "OK: srcmac");
1435 return count;
1436 }
1437
1438 if (!strcmp(name, "clear_counters")) {
1439 pktgen_clear_counters(pkt_dev);
1440 sprintf(pg_result, "OK: Clearing counters.\n");
1441 return count;
1442 }
1443
1444 if (!strcmp(name, "flows")) {
1445 len = num_arg(&user_buffer[i], 10, &value);
1446 if (len < 0)
1447 return len;
1448
1449 i += len;
1450 if (value > MAX_CFLOWS)
1451 value = MAX_CFLOWS;
1452
1453 pkt_dev->cflows = value;
1454 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1455 return count;
1456 }
1457
1458 if (!strcmp(name, "flowlen")) {
1459 len = num_arg(&user_buffer[i], 10, &value);
1460 if (len < 0)
1461 return len;
1462
1463 i += len;
1464 pkt_dev->lflow = value;
1465 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1466 return count;
1467 }
1468
1469 if (!strcmp(name, "queue_map_min")) {
1470 len = num_arg(&user_buffer[i], 5, &value);
1471 if (len < 0)
1472 return len;
1473
1474 i += len;
1475 pkt_dev->queue_map_min = value;
1476 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1477 return count;
1478 }
1479
1480 if (!strcmp(name, "queue_map_max")) {
1481 len = num_arg(&user_buffer[i], 5, &value);
1482 if (len < 0)
1483 return len;
1484
1485 i += len;
1486 pkt_dev->queue_map_max = value;
1487 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1488 return count;
1489 }
1490
1491 if (!strcmp(name, "mpls")) {
1492 unsigned n, cnt;
1493
1494 len = get_labels(&user_buffer[i], pkt_dev);
1495 if (len < 0)
1496 return len;
1497 i += len;
1498 cnt = sprintf(pg_result, "OK: mpls=");
1499 for (n = 0; n < pkt_dev->nr_labels; n++)
1500 cnt += sprintf(pg_result + cnt,
1501 "%08x%s", ntohl(pkt_dev->labels[n]),
1502 n == pkt_dev->nr_labels-1 ? "" : ",");
1503
1504 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1505 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1506 pkt_dev->svlan_id = 0xffff;
1507
1508 if (debug)
1509 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1510 }
1511 return count;
1512 }
1513
1514 if (!strcmp(name, "vlan_id")) {
1515 len = num_arg(&user_buffer[i], 4, &value);
1516 if (len < 0)
1517 return len;
1518
1519 i += len;
1520 if (value <= 4095) {
1521 pkt_dev->vlan_id = value; /* turn on VLAN */
1522
1523 if (debug)
1524 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1525
1526 if (debug && pkt_dev->nr_labels)
1527 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1528
1529 pkt_dev->nr_labels = 0; /* turn off MPLS */
1530 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1531 } else {
1532 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1533 pkt_dev->svlan_id = 0xffff;
1534
1535 if (debug)
1536 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1537 }
1538 return count;
1539 }
1540
1541 if (!strcmp(name, "vlan_p")) {
1542 len = num_arg(&user_buffer[i], 1, &value);
1543 if (len < 0)
1544 return len;
1545
1546 i += len;
1547 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1548 pkt_dev->vlan_p = value;
1549 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1550 } else {
1551 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1552 }
1553 return count;
1554 }
1555
1556 if (!strcmp(name, "vlan_cfi")) {
1557 len = num_arg(&user_buffer[i], 1, &value);
1558 if (len < 0)
1559 return len;
1560
1561 i += len;
1562 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1563 pkt_dev->vlan_cfi = value;
1564 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1565 } else {
1566 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1567 }
1568 return count;
1569 }
1570
1571 if (!strcmp(name, "svlan_id")) {
1572 len = num_arg(&user_buffer[i], 4, &value);
1573 if (len < 0)
1574 return len;
1575
1576 i += len;
1577 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1578 pkt_dev->svlan_id = value; /* turn on SVLAN */
1579
1580 if (debug)
1581 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1582
1583 if (debug && pkt_dev->nr_labels)
1584 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1585
1586 pkt_dev->nr_labels = 0; /* turn off MPLS */
1587 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1588 } else {
1589 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1590 pkt_dev->svlan_id = 0xffff;
1591
1592 if (debug)
1593 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1594 }
1595 return count;
1596 }
1597
1598 if (!strcmp(name, "svlan_p")) {
1599 len = num_arg(&user_buffer[i], 1, &value);
1600 if (len < 0)
1601 return len;
1602
1603 i += len;
1604 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1605 pkt_dev->svlan_p = value;
1606 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1607 } else {
1608 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1609 }
1610 return count;
1611 }
1612
1613 if (!strcmp(name, "svlan_cfi")) {
1614 len = num_arg(&user_buffer[i], 1, &value);
1615 if (len < 0)
1616 return len;
1617
1618 i += len;
1619 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1620 pkt_dev->svlan_cfi = value;
1621 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1622 } else {
1623 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1624 }
1625 return count;
1626 }
1627
1628 if (!strcmp(name, "tos")) {
1629 __u32 tmp_value = 0;
1630 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1631 if (len < 0)
1632 return len;
1633
1634 i += len;
1635 if (len == 2) {
1636 pkt_dev->tos = tmp_value;
1637 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1638 } else {
1639 sprintf(pg_result, "ERROR: tos must be 00-ff");
1640 }
1641 return count;
1642 }
1643
1644 if (!strcmp(name, "traffic_class")) {
1645 __u32 tmp_value = 0;
1646 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1647 if (len < 0)
1648 return len;
1649
1650 i += len;
1651 if (len == 2) {
1652 pkt_dev->traffic_class = tmp_value;
1653 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1654 } else {
1655 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1656 }
1657 return count;
1658 }
1659
1660 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1661 return -EINVAL;
1662 }
1663
1664 static int pktgen_if_open(struct inode *inode, struct file *file)
1665 {
1666 return single_open(file, pktgen_if_show, PDE(inode)->data);
1667 }
1668
1669 static const struct file_operations pktgen_if_fops = {
1670 .owner = THIS_MODULE,
1671 .open = pktgen_if_open,
1672 .read = seq_read,
1673 .llseek = seq_lseek,
1674 .write = pktgen_if_write,
1675 .release = single_release,
1676 };
1677
1678 static int pktgen_thread_show(struct seq_file *seq, void *v)
1679 {
1680 struct pktgen_thread *t = seq->private;
1681 const struct pktgen_dev *pkt_dev;
1682
1683 BUG_ON(!t);
1684
1685 seq_printf(seq, "Running: ");
1686
1687 if_lock(t);
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 seq_printf(seq, "\nStopped: ");
1693
1694 list_for_each_entry(pkt_dev, &t->if_list, list)
1695 if (!pkt_dev->running)
1696 seq_printf(seq, "%s ", pkt_dev->odev->name);
1697
1698 if (t->result[0])
1699 seq_printf(seq, "\nResult: %s\n", t->result);
1700 else
1701 seq_printf(seq, "\nResult: NA\n");
1702
1703 if_unlock(t);
1704
1705 return 0;
1706 }
1707
1708 static ssize_t pktgen_thread_write(struct file *file,
1709 const char __user * user_buffer,
1710 size_t count, loff_t * offset)
1711 {
1712 struct seq_file *seq = (struct seq_file *)file->private_data;
1713 struct pktgen_thread *t = seq->private;
1714 int i = 0, max, len, ret;
1715 char name[40];
1716 char *pg_result;
1717
1718 if (count < 1) {
1719 // sprintf(pg_result, "Wrong command format");
1720 return -EINVAL;
1721 }
1722
1723 max = count - i;
1724 len = count_trail_chars(&user_buffer[i], max);
1725 if (len < 0)
1726 return len;
1727
1728 i += len;
1729
1730 /* Read variable name */
1731
1732 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1733 if (len < 0)
1734 return len;
1735
1736 memset(name, 0, sizeof(name));
1737 if (copy_from_user(name, &user_buffer[i], len))
1738 return -EFAULT;
1739 i += len;
1740
1741 max = count - i;
1742 len = count_trail_chars(&user_buffer[i], max);
1743 if (len < 0)
1744 return len;
1745
1746 i += len;
1747
1748 if (debug)
1749 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1750 name, (unsigned long)count);
1751
1752 if (!t) {
1753 printk(KERN_ERR "pktgen: ERROR: No thread\n");
1754 ret = -EINVAL;
1755 goto out;
1756 }
1757
1758 pg_result = &(t->result[0]);
1759
1760 if (!strcmp(name, "add_device")) {
1761 char f[32];
1762 memset(f, 0, 32);
1763 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1764 if (len < 0) {
1765 ret = len;
1766 goto out;
1767 }
1768 if (copy_from_user(f, &user_buffer[i], len))
1769 return -EFAULT;
1770 i += len;
1771 mutex_lock(&pktgen_thread_lock);
1772 pktgen_add_device(t, f);
1773 mutex_unlock(&pktgen_thread_lock);
1774 ret = count;
1775 sprintf(pg_result, "OK: add_device=%s", f);
1776 goto out;
1777 }
1778
1779 if (!strcmp(name, "rem_device_all")) {
1780 mutex_lock(&pktgen_thread_lock);
1781 t->control |= T_REMDEVALL;
1782 mutex_unlock(&pktgen_thread_lock);
1783 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1784 ret = count;
1785 sprintf(pg_result, "OK: rem_device_all");
1786 goto out;
1787 }
1788
1789 if (!strcmp(name, "max_before_softirq")) {
1790 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1791 ret = count;
1792 goto out;
1793 }
1794
1795 ret = -EINVAL;
1796 out:
1797 return ret;
1798 }
1799
1800 static int pktgen_thread_open(struct inode *inode, struct file *file)
1801 {
1802 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1803 }
1804
1805 static const struct file_operations pktgen_thread_fops = {
1806 .owner = THIS_MODULE,
1807 .open = pktgen_thread_open,
1808 .read = seq_read,
1809 .llseek = seq_lseek,
1810 .write = pktgen_thread_write,
1811 .release = single_release,
1812 };
1813
1814 /* Think find or remove for NN */
1815 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1816 {
1817 struct pktgen_thread *t;
1818 struct pktgen_dev *pkt_dev = NULL;
1819
1820 list_for_each_entry(t, &pktgen_threads, th_list) {
1821 pkt_dev = pktgen_find_dev(t, ifname);
1822 if (pkt_dev) {
1823 if (remove) {
1824 if_lock(t);
1825 pkt_dev->removal_mark = 1;
1826 t->control |= T_REMDEV;
1827 if_unlock(t);
1828 }
1829 break;
1830 }
1831 }
1832 return pkt_dev;
1833 }
1834
1835 /*
1836 * mark a device for removal
1837 */
1838 static void pktgen_mark_device(const char *ifname)
1839 {
1840 struct pktgen_dev *pkt_dev = NULL;
1841 const int max_tries = 10, msec_per_try = 125;
1842 int i = 0;
1843
1844 mutex_lock(&pktgen_thread_lock);
1845 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname);
1846
1847 while (1) {
1848
1849 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1850 if (pkt_dev == NULL)
1851 break; /* success */
1852
1853 mutex_unlock(&pktgen_thread_lock);
1854 pr_debug("pktgen: pktgen_mark_device waiting for %s "
1855 "to disappear....\n", ifname);
1856 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1857 mutex_lock(&pktgen_thread_lock);
1858
1859 if (++i >= max_tries) {
1860 printk(KERN_ERR "pktgen_mark_device: timed out after "
1861 "waiting %d msec for device %s to be removed\n",
1862 msec_per_try * i, ifname);
1863 break;
1864 }
1865
1866 }
1867
1868 mutex_unlock(&pktgen_thread_lock);
1869 }
1870
1871 static void pktgen_change_name(struct net_device *dev)
1872 {
1873 struct pktgen_thread *t;
1874
1875 list_for_each_entry(t, &pktgen_threads, th_list) {
1876 struct pktgen_dev *pkt_dev;
1877
1878 list_for_each_entry(pkt_dev, &t->if_list, list) {
1879 if (pkt_dev->odev != dev)
1880 continue;
1881
1882 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1883
1884 pkt_dev->entry = proc_create_data(dev->name, 0600,
1885 pg_proc_dir,
1886 &pktgen_if_fops,
1887 pkt_dev);
1888 if (!pkt_dev->entry)
1889 printk(KERN_ERR "pktgen: can't move proc "
1890 " entry for '%s'\n", dev->name);
1891 break;
1892 }
1893 }
1894 }
1895
1896 static int pktgen_device_event(struct notifier_block *unused,
1897 unsigned long event, void *ptr)
1898 {
1899 struct net_device *dev = ptr;
1900
1901 if (!net_eq(dev_net(dev), &init_net))
1902 return NOTIFY_DONE;
1903
1904 /* It is OK that we do not hold the group lock right now,
1905 * as we run under the RTNL lock.
1906 */
1907
1908 switch (event) {
1909 case NETDEV_CHANGENAME:
1910 pktgen_change_name(dev);
1911 break;
1912
1913 case NETDEV_UNREGISTER:
1914 pktgen_mark_device(dev->name);
1915 break;
1916 }
1917
1918 return NOTIFY_DONE;
1919 }
1920
1921 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev,
1922 const char *ifname)
1923 {
1924 char b[IFNAMSIZ+5];
1925 int i = 0;
1926
1927 for (i = 0; ifname[i] != '@'; i++) {
1928 if (i == IFNAMSIZ)
1929 break;
1930
1931 b[i] = ifname[i];
1932 }
1933 b[i] = 0;
1934
1935 return dev_get_by_name(&init_net, b);
1936 }
1937
1938
1939 /* Associate pktgen_dev with a device. */
1940
1941 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1942 {
1943 struct net_device *odev;
1944 int err;
1945
1946 /* Clean old setups */
1947 if (pkt_dev->odev) {
1948 dev_put(pkt_dev->odev);
1949 pkt_dev->odev = NULL;
1950 }
1951
1952 odev = pktgen_dev_get_by_name(pkt_dev, ifname);
1953 if (!odev) {
1954 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname);
1955 return -ENODEV;
1956 }
1957
1958 if (odev->type != ARPHRD_ETHER) {
1959 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname);
1960 err = -EINVAL;
1961 } else if (!netif_running(odev)) {
1962 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname);
1963 err = -ENETDOWN;
1964 } else {
1965 pkt_dev->odev = odev;
1966 return 0;
1967 }
1968
1969 dev_put(odev);
1970 return err;
1971 }
1972
1973 /* Read pkt_dev from the interface and set up internal pktgen_dev
1974 * structure to have the right information to create/send packets
1975 */
1976 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
1977 {
1978 int ntxq;
1979
1980 if (!pkt_dev->odev) {
1981 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in "
1982 "setup_inject.\n");
1983 sprintf(pkt_dev->result,
1984 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1985 return;
1986 }
1987
1988 /* make sure that we don't pick a non-existing transmit queue */
1989 ntxq = pkt_dev->odev->real_num_tx_queues;
1990
1991 if (ntxq <= pkt_dev->queue_map_min) {
1992 printk(KERN_WARNING "pktgen: WARNING: Requested "
1993 "queue_map_min (zero-based) (%d) exceeds valid range "
1994 "[0 - %d] for (%d) queues on %s, resetting\n",
1995 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
1996 pkt_dev->odev->name);
1997 pkt_dev->queue_map_min = ntxq - 1;
1998 }
1999 if (pkt_dev->queue_map_max >= ntxq) {
2000 printk(KERN_WARNING "pktgen: WARNING: Requested "
2001 "queue_map_max (zero-based) (%d) exceeds valid range "
2002 "[0 - %d] for (%d) queues on %s, resetting\n",
2003 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2004 pkt_dev->odev->name);
2005 pkt_dev->queue_map_max = ntxq - 1;
2006 }
2007
2008 /* Default to the interface's mac if not explicitly set. */
2009
2010 if (is_zero_ether_addr(pkt_dev->src_mac))
2011 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2012
2013 /* Set up Dest MAC */
2014 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2015
2016 /* Set up pkt size */
2017 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2018
2019 if (pkt_dev->flags & F_IPV6) {
2020 /*
2021 * Skip this automatic address setting until locks or functions
2022 * gets exported
2023 */
2024
2025 #ifdef NOTNOW
2026 int i, set = 0, err = 1;
2027 struct inet6_dev *idev;
2028
2029 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2030 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2031 set = 1;
2032 break;
2033 }
2034
2035 if (!set) {
2036
2037 /*
2038 * Use linklevel address if unconfigured.
2039 *
2040 * use ipv6_get_lladdr if/when it's get exported
2041 */
2042
2043 rcu_read_lock();
2044 idev = __in6_dev_get(pkt_dev->odev);
2045 if (idev) {
2046 struct inet6_ifaddr *ifp;
2047
2048 read_lock_bh(&idev->lock);
2049 for (ifp = idev->addr_list; ifp;
2050 ifp = ifp->if_next) {
2051 if (ifp->scope == IFA_LINK
2052 && !(ifp->
2053 flags & IFA_F_TENTATIVE)) {
2054 ipv6_addr_copy(&pkt_dev->
2055 cur_in6_saddr,
2056 &ifp->addr);
2057 err = 0;
2058 break;
2059 }
2060 }
2061 read_unlock_bh(&idev->lock);
2062 }
2063 rcu_read_unlock();
2064 if (err)
2065 printk(KERN_ERR "pktgen: ERROR: IPv6 link "
2066 "address not availble.\n");
2067 }
2068 #endif
2069 } else {
2070 pkt_dev->saddr_min = 0;
2071 pkt_dev->saddr_max = 0;
2072 if (strlen(pkt_dev->src_min) == 0) {
2073
2074 struct in_device *in_dev;
2075
2076 rcu_read_lock();
2077 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2078 if (in_dev) {
2079 if (in_dev->ifa_list) {
2080 pkt_dev->saddr_min =
2081 in_dev->ifa_list->ifa_address;
2082 pkt_dev->saddr_max = pkt_dev->saddr_min;
2083 }
2084 }
2085 rcu_read_unlock();
2086 } else {
2087 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2088 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2089 }
2090
2091 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2092 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2093 }
2094 /* Initialize current values. */
2095 pkt_dev->cur_dst_mac_offset = 0;
2096 pkt_dev->cur_src_mac_offset = 0;
2097 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2098 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2099 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2100 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2101 pkt_dev->nflows = 0;
2102 }
2103
2104
2105 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2106 {
2107 ktime_t start_time, end_time;
2108 s64 remaining;
2109 struct hrtimer_sleeper t;
2110
2111 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2112 hrtimer_set_expires(&t.timer, spin_until);
2113
2114 remaining = ktime_to_us(hrtimer_expires_remaining(&t.timer));
2115 if (remaining <= 0) {
2116 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2117 return;
2118 }
2119
2120 start_time = ktime_now();
2121 if (remaining < 100)
2122 udelay(remaining); /* really small just spin */
2123 else {
2124 /* see do_nanosleep */
2125 hrtimer_init_sleeper(&t, current);
2126 do {
2127 set_current_state(TASK_INTERRUPTIBLE);
2128 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2129 if (!hrtimer_active(&t.timer))
2130 t.task = NULL;
2131
2132 if (likely(t.task))
2133 schedule();
2134
2135 hrtimer_cancel(&t.timer);
2136 } while (t.task && pkt_dev->running && !signal_pending(current));
2137 __set_current_state(TASK_RUNNING);
2138 }
2139 end_time = ktime_now();
2140
2141 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2142 pkt_dev->next_tx = ktime_add_ns(end_time, pkt_dev->delay);
2143 }
2144
2145 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2146 {
2147 pkt_dev->pkt_overhead = 0;
2148 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2149 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2150 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2151 }
2152
2153 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2154 {
2155 return !!(pkt_dev->flows[flow].flags & F_INIT);
2156 }
2157
2158 static inline int f_pick(struct pktgen_dev *pkt_dev)
2159 {
2160 int flow = pkt_dev->curfl;
2161
2162 if (pkt_dev->flags & F_FLOW_SEQ) {
2163 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2164 /* reset time */
2165 pkt_dev->flows[flow].count = 0;
2166 pkt_dev->flows[flow].flags = 0;
2167 pkt_dev->curfl += 1;
2168 if (pkt_dev->curfl >= pkt_dev->cflows)
2169 pkt_dev->curfl = 0; /*reset */
2170 }
2171 } else {
2172 flow = random32() % pkt_dev->cflows;
2173 pkt_dev->curfl = flow;
2174
2175 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2176 pkt_dev->flows[flow].count = 0;
2177 pkt_dev->flows[flow].flags = 0;
2178 }
2179 }
2180
2181 return pkt_dev->curfl;
2182 }
2183
2184
2185 #ifdef CONFIG_XFRM
2186 /* If there was already an IPSEC SA, we keep it as is, else
2187 * we go look for it ...
2188 */
2189 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2190 {
2191 struct xfrm_state *x = pkt_dev->flows[flow].x;
2192 if (!x) {
2193 /*slow path: we dont already have xfrm_state*/
2194 x = xfrm_stateonly_find(&init_net,
2195 (xfrm_address_t *)&pkt_dev->cur_daddr,
2196 (xfrm_address_t *)&pkt_dev->cur_saddr,
2197 AF_INET,
2198 pkt_dev->ipsmode,
2199 pkt_dev->ipsproto, 0);
2200 if (x) {
2201 pkt_dev->flows[flow].x = x;
2202 set_pkt_overhead(pkt_dev);
2203 pkt_dev->pkt_overhead += x->props.header_len;
2204 }
2205
2206 }
2207 }
2208 #endif
2209 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2210 {
2211
2212 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2213 pkt_dev->cur_queue_map = smp_processor_id();
2214
2215 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2216 __u16 t;
2217 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2218 t = random32() %
2219 (pkt_dev->queue_map_max -
2220 pkt_dev->queue_map_min + 1)
2221 + pkt_dev->queue_map_min;
2222 } else {
2223 t = pkt_dev->cur_queue_map + 1;
2224 if (t > pkt_dev->queue_map_max)
2225 t = pkt_dev->queue_map_min;
2226 }
2227 pkt_dev->cur_queue_map = t;
2228 }
2229 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2230 }
2231
2232 /* Increment/randomize headers according to flags and current values
2233 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2234 */
2235 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2236 {
2237 __u32 imn;
2238 __u32 imx;
2239 int flow = 0;
2240
2241 if (pkt_dev->cflows)
2242 flow = f_pick(pkt_dev);
2243
2244 /* Deal with source MAC */
2245 if (pkt_dev->src_mac_count > 1) {
2246 __u32 mc;
2247 __u32 tmp;
2248
2249 if (pkt_dev->flags & F_MACSRC_RND)
2250 mc = random32() % pkt_dev->src_mac_count;
2251 else {
2252 mc = pkt_dev->cur_src_mac_offset++;
2253 if (pkt_dev->cur_src_mac_offset >=
2254 pkt_dev->src_mac_count)
2255 pkt_dev->cur_src_mac_offset = 0;
2256 }
2257
2258 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2259 pkt_dev->hh[11] = tmp;
2260 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2261 pkt_dev->hh[10] = tmp;
2262 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2263 pkt_dev->hh[9] = tmp;
2264 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2265 pkt_dev->hh[8] = tmp;
2266 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2267 pkt_dev->hh[7] = tmp;
2268 }
2269
2270 /* Deal with Destination MAC */
2271 if (pkt_dev->dst_mac_count > 1) {
2272 __u32 mc;
2273 __u32 tmp;
2274
2275 if (pkt_dev->flags & F_MACDST_RND)
2276 mc = random32() % pkt_dev->dst_mac_count;
2277
2278 else {
2279 mc = pkt_dev->cur_dst_mac_offset++;
2280 if (pkt_dev->cur_dst_mac_offset >=
2281 pkt_dev->dst_mac_count) {
2282 pkt_dev->cur_dst_mac_offset = 0;
2283 }
2284 }
2285
2286 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2287 pkt_dev->hh[5] = tmp;
2288 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2289 pkt_dev->hh[4] = tmp;
2290 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2291 pkt_dev->hh[3] = tmp;
2292 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2293 pkt_dev->hh[2] = tmp;
2294 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2295 pkt_dev->hh[1] = tmp;
2296 }
2297
2298 if (pkt_dev->flags & F_MPLS_RND) {
2299 unsigned i;
2300 for (i = 0; i < pkt_dev->nr_labels; i++)
2301 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2302 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2303 ((__force __be32)random32() &
2304 htonl(0x000fffff));
2305 }
2306
2307 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2308 pkt_dev->vlan_id = random32() & (4096-1);
2309 }
2310
2311 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2312 pkt_dev->svlan_id = random32() & (4096 - 1);
2313 }
2314
2315 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2316 if (pkt_dev->flags & F_UDPSRC_RND)
2317 pkt_dev->cur_udp_src = random32() %
2318 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2319 + pkt_dev->udp_src_min;
2320
2321 else {
2322 pkt_dev->cur_udp_src++;
2323 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2324 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2325 }
2326 }
2327
2328 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2329 if (pkt_dev->flags & F_UDPDST_RND) {
2330 pkt_dev->cur_udp_dst = random32() %
2331 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2332 + pkt_dev->udp_dst_min;
2333 } else {
2334 pkt_dev->cur_udp_dst++;
2335 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2336 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2337 }
2338 }
2339
2340 if (!(pkt_dev->flags & F_IPV6)) {
2341
2342 imn = ntohl(pkt_dev->saddr_min);
2343 imx = ntohl(pkt_dev->saddr_max);
2344 if (imn < imx) {
2345 __u32 t;
2346 if (pkt_dev->flags & F_IPSRC_RND)
2347 t = random32() % (imx - imn) + imn;
2348 else {
2349 t = ntohl(pkt_dev->cur_saddr);
2350 t++;
2351 if (t > imx)
2352 t = imn;
2353
2354 }
2355 pkt_dev->cur_saddr = htonl(t);
2356 }
2357
2358 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2359 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2360 } else {
2361 imn = ntohl(pkt_dev->daddr_min);
2362 imx = ntohl(pkt_dev->daddr_max);
2363 if (imn < imx) {
2364 __u32 t;
2365 __be32 s;
2366 if (pkt_dev->flags & F_IPDST_RND) {
2367
2368 t = random32() % (imx - imn) + imn;
2369 s = htonl(t);
2370
2371 while (ipv4_is_loopback(s) ||
2372 ipv4_is_multicast(s) ||
2373 ipv4_is_lbcast(s) ||
2374 ipv4_is_zeronet(s) ||
2375 ipv4_is_local_multicast(s)) {
2376 t = random32() % (imx - imn) + imn;
2377 s = htonl(t);
2378 }
2379 pkt_dev->cur_daddr = s;
2380 } else {
2381 t = ntohl(pkt_dev->cur_daddr);
2382 t++;
2383 if (t > imx) {
2384 t = imn;
2385 }
2386 pkt_dev->cur_daddr = htonl(t);
2387 }
2388 }
2389 if (pkt_dev->cflows) {
2390 pkt_dev->flows[flow].flags |= F_INIT;
2391 pkt_dev->flows[flow].cur_daddr =
2392 pkt_dev->cur_daddr;
2393 #ifdef CONFIG_XFRM
2394 if (pkt_dev->flags & F_IPSEC_ON)
2395 get_ipsec_sa(pkt_dev, flow);
2396 #endif
2397 pkt_dev->nflows++;
2398 }
2399 }
2400 } else { /* IPV6 * */
2401
2402 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2403 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2404 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2405 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2406 else {
2407 int i;
2408
2409 /* Only random destinations yet */
2410
2411 for (i = 0; i < 4; i++) {
2412 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2413 (((__force __be32)random32() |
2414 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2415 pkt_dev->max_in6_daddr.s6_addr32[i]);
2416 }
2417 }
2418 }
2419
2420 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2421 __u32 t;
2422 if (pkt_dev->flags & F_TXSIZE_RND) {
2423 t = random32() %
2424 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2425 + pkt_dev->min_pkt_size;
2426 } else {
2427 t = pkt_dev->cur_pkt_size + 1;
2428 if (t > pkt_dev->max_pkt_size)
2429 t = pkt_dev->min_pkt_size;
2430 }
2431 pkt_dev->cur_pkt_size = t;
2432 }
2433
2434 set_cur_queue_map(pkt_dev);
2435
2436 pkt_dev->flows[flow].count++;
2437 }
2438
2439
2440 #ifdef CONFIG_XFRM
2441 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2442 {
2443 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2444 int err = 0;
2445 struct iphdr *iph;
2446
2447 if (!x)
2448 return 0;
2449 /* XXX: we dont support tunnel mode for now until
2450 * we resolve the dst issue */
2451 if (x->props.mode != XFRM_MODE_TRANSPORT)
2452 return 0;
2453
2454 spin_lock(&x->lock);
2455 iph = ip_hdr(skb);
2456
2457 err = x->outer_mode->output(x, skb);
2458 if (err)
2459 goto error;
2460 err = x->type->output(x, skb);
2461 if (err)
2462 goto error;
2463
2464 x->curlft.bytes += skb->len;
2465 x->curlft.packets++;
2466 error:
2467 spin_unlock(&x->lock);
2468 return err;
2469 }
2470
2471 static void free_SAs(struct pktgen_dev *pkt_dev)
2472 {
2473 if (pkt_dev->cflows) {
2474 /* let go of the SAs if we have them */
2475 int i = 0;
2476 for (; i < pkt_dev->cflows; i++) {
2477 struct xfrm_state *x = pkt_dev->flows[i].x;
2478 if (x) {
2479 xfrm_state_put(x);
2480 pkt_dev->flows[i].x = NULL;
2481 }
2482 }
2483 }
2484 }
2485
2486 static int process_ipsec(struct pktgen_dev *pkt_dev,
2487 struct sk_buff *skb, __be16 protocol)
2488 {
2489 if (pkt_dev->flags & F_IPSEC_ON) {
2490 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2491 int nhead = 0;
2492 if (x) {
2493 int ret;
2494 __u8 *eth;
2495 nhead = x->props.header_len - skb_headroom(skb);
2496 if (nhead > 0) {
2497 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2498 if (ret < 0) {
2499 printk(KERN_ERR "Error expanding "
2500 "ipsec packet %d\n", ret);
2501 goto err;
2502 }
2503 }
2504
2505 /* ipsec is not expecting ll header */
2506 skb_pull(skb, ETH_HLEN);
2507 ret = pktgen_output_ipsec(skb, pkt_dev);
2508 if (ret) {
2509 printk(KERN_ERR "Error creating ipsec "
2510 "packet %d\n", ret);
2511 goto err;
2512 }
2513 /* restore ll */
2514 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2515 memcpy(eth, pkt_dev->hh, 12);
2516 *(u16 *) &eth[12] = protocol;
2517 }
2518 }
2519 return 1;
2520 err:
2521 kfree_skb(skb);
2522 return 0;
2523 }
2524 #endif
2525
2526 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2527 {
2528 unsigned i;
2529 for (i = 0; i < pkt_dev->nr_labels; i++)
2530 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2531
2532 mpls--;
2533 *mpls |= MPLS_STACK_BOTTOM;
2534 }
2535
2536 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2537 unsigned int prio)
2538 {
2539 return htons(id | (cfi << 12) | (prio << 13));
2540 }
2541
2542 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2543 struct pktgen_dev *pkt_dev)
2544 {
2545 struct sk_buff *skb = NULL;
2546 __u8 *eth;
2547 struct udphdr *udph;
2548 int datalen, iplen;
2549 struct iphdr *iph;
2550 struct pktgen_hdr *pgh = NULL;
2551 __be16 protocol = htons(ETH_P_IP);
2552 __be32 *mpls;
2553 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2554 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2555 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2556 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2557 u16 queue_map;
2558
2559 if (pkt_dev->nr_labels)
2560 protocol = htons(ETH_P_MPLS_UC);
2561
2562 if (pkt_dev->vlan_id != 0xffff)
2563 protocol = htons(ETH_P_8021Q);
2564
2565 /* Update any of the values, used when we're incrementing various
2566 * fields.
2567 */
2568 queue_map = pkt_dev->cur_queue_map;
2569 mod_cur_headers(pkt_dev);
2570
2571 datalen = (odev->hard_header_len + 16) & ~0xf;
2572 skb = __netdev_alloc_skb(odev,
2573 pkt_dev->cur_pkt_size + 64
2574 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2575 if (!skb) {
2576 sprintf(pkt_dev->result, "No memory");
2577 return NULL;
2578 }
2579
2580 skb_reserve(skb, datalen);
2581
2582 /* Reserve for ethernet and IP header */
2583 eth = (__u8 *) skb_push(skb, 14);
2584 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2585 if (pkt_dev->nr_labels)
2586 mpls_push(mpls, pkt_dev);
2587
2588 if (pkt_dev->vlan_id != 0xffff) {
2589 if (pkt_dev->svlan_id != 0xffff) {
2590 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2591 *svlan_tci = build_tci(pkt_dev->svlan_id,
2592 pkt_dev->svlan_cfi,
2593 pkt_dev->svlan_p);
2594 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2595 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2596 }
2597 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2598 *vlan_tci = build_tci(pkt_dev->vlan_id,
2599 pkt_dev->vlan_cfi,
2600 pkt_dev->vlan_p);
2601 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2602 *vlan_encapsulated_proto = htons(ETH_P_IP);
2603 }
2604
2605 skb->network_header = skb->tail;
2606 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2607 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2608 skb_set_queue_mapping(skb, queue_map);
2609 iph = ip_hdr(skb);
2610 udph = udp_hdr(skb);
2611
2612 memcpy(eth, pkt_dev->hh, 12);
2613 *(__be16 *) & eth[12] = protocol;
2614
2615 /* Eth + IPh + UDPh + mpls */
2616 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2617 pkt_dev->pkt_overhead;
2618 if (datalen < sizeof(struct pktgen_hdr))
2619 datalen = sizeof(struct pktgen_hdr);
2620
2621 udph->source = htons(pkt_dev->cur_udp_src);
2622 udph->dest = htons(pkt_dev->cur_udp_dst);
2623 udph->len = htons(datalen + 8); /* DATA + udphdr */
2624 udph->check = 0; /* No checksum */
2625
2626 iph->ihl = 5;
2627 iph->version = 4;
2628 iph->ttl = 32;
2629 iph->tos = pkt_dev->tos;
2630 iph->protocol = IPPROTO_UDP; /* UDP */
2631 iph->saddr = pkt_dev->cur_saddr;
2632 iph->daddr = pkt_dev->cur_daddr;
2633 iph->frag_off = 0;
2634 iplen = 20 + 8 + datalen;
2635 iph->tot_len = htons(iplen);
2636 iph->check = 0;
2637 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2638 skb->protocol = protocol;
2639 skb->mac_header = (skb->network_header - ETH_HLEN -
2640 pkt_dev->pkt_overhead);
2641 skb->dev = odev;
2642 skb->pkt_type = PACKET_HOST;
2643
2644 if (pkt_dev->nfrags <= 0)
2645 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2646 else {
2647 int frags = pkt_dev->nfrags;
2648 int i;
2649
2650 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2651
2652 if (frags > MAX_SKB_FRAGS)
2653 frags = MAX_SKB_FRAGS;
2654 if (datalen > frags * PAGE_SIZE) {
2655 skb_put(skb, datalen - frags * PAGE_SIZE);
2656 datalen = frags * PAGE_SIZE;
2657 }
2658
2659 i = 0;
2660 while (datalen > 0) {
2661 struct page *page = alloc_pages(GFP_KERNEL, 0);
2662 skb_shinfo(skb)->frags[i].page = page;
2663 skb_shinfo(skb)->frags[i].page_offset = 0;
2664 skb_shinfo(skb)->frags[i].size =
2665 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2666 datalen -= skb_shinfo(skb)->frags[i].size;
2667 skb->len += skb_shinfo(skb)->frags[i].size;
2668 skb->data_len += skb_shinfo(skb)->frags[i].size;
2669 i++;
2670 skb_shinfo(skb)->nr_frags = i;
2671 }
2672
2673 while (i < frags) {
2674 int rem;
2675
2676 if (i == 0)
2677 break;
2678
2679 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2680 if (rem == 0)
2681 break;
2682
2683 skb_shinfo(skb)->frags[i - 1].size -= rem;
2684
2685 skb_shinfo(skb)->frags[i] =
2686 skb_shinfo(skb)->frags[i - 1];
2687 get_page(skb_shinfo(skb)->frags[i].page);
2688 skb_shinfo(skb)->frags[i].page =
2689 skb_shinfo(skb)->frags[i - 1].page;
2690 skb_shinfo(skb)->frags[i].page_offset +=
2691 skb_shinfo(skb)->frags[i - 1].size;
2692 skb_shinfo(skb)->frags[i].size = rem;
2693 i++;
2694 skb_shinfo(skb)->nr_frags = i;
2695 }
2696 }
2697
2698 /* Stamp the time, and sequence number,
2699 * convert them to network byte order
2700 */
2701 if (pgh) {
2702 struct timeval timestamp;
2703
2704 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2705 pgh->seq_num = htonl(pkt_dev->seq_num);
2706
2707 do_gettimeofday(&timestamp);
2708 pgh->tv_sec = htonl(timestamp.tv_sec);
2709 pgh->tv_usec = htonl(timestamp.tv_usec);
2710 }
2711
2712 #ifdef CONFIG_XFRM
2713 if (!process_ipsec(pkt_dev, skb, protocol))
2714 return NULL;
2715 #endif
2716
2717 return skb;
2718 }
2719
2720 /*
2721 * scan_ip6, fmt_ip taken from dietlibc-0.21
2722 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2723 *
2724 * Slightly modified for kernel.
2725 * Should be candidate for net/ipv4/utils.c
2726 * --ro
2727 */
2728
2729 static unsigned int scan_ip6(const char *s, char ip[16])
2730 {
2731 unsigned int i;
2732 unsigned int len = 0;
2733 unsigned long u;
2734 char suffix[16];
2735 unsigned int prefixlen = 0;
2736 unsigned int suffixlen = 0;
2737 __be32 tmp;
2738 char *pos;
2739
2740 for (i = 0; i < 16; i++)
2741 ip[i] = 0;
2742
2743 for (;;) {
2744 if (*s == ':') {
2745 len++;
2746 if (s[1] == ':') { /* Found "::", skip to part 2 */
2747 s += 2;
2748 len++;
2749 break;
2750 }
2751 s++;
2752 }
2753
2754 u = simple_strtoul(s, &pos, 16);
2755 i = pos - s;
2756 if (!i)
2757 return 0;
2758 if (prefixlen == 12 && s[i] == '.') {
2759
2760 /* the last 4 bytes may be written as IPv4 address */
2761
2762 tmp = in_aton(s);
2763 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2764 return i + len;
2765 }
2766 ip[prefixlen++] = (u >> 8);
2767 ip[prefixlen++] = (u & 255);
2768 s += i;
2769 len += i;
2770 if (prefixlen == 16)
2771 return len;
2772 }
2773
2774 /* part 2, after "::" */
2775 for (;;) {
2776 if (*s == ':') {
2777 if (suffixlen == 0)
2778 break;
2779 s++;
2780 len++;
2781 } else if (suffixlen != 0)
2782 break;
2783
2784 u = simple_strtol(s, &pos, 16);
2785 i = pos - s;
2786 if (!i) {
2787 if (*s)
2788 len--;
2789 break;
2790 }
2791 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2792 tmp = in_aton(s);
2793 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2794 sizeof(tmp));
2795 suffixlen += 4;
2796 len += strlen(s);
2797 break;
2798 }
2799 suffix[suffixlen++] = (u >> 8);
2800 suffix[suffixlen++] = (u & 255);
2801 s += i;
2802 len += i;
2803 if (prefixlen + suffixlen == 16)
2804 break;
2805 }
2806 for (i = 0; i < suffixlen; i++)
2807 ip[16 - suffixlen + i] = suffix[i];
2808 return len;
2809 }
2810
2811 static char tohex(char hexdigit)
2812 {
2813 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2814 }
2815
2816 static int fmt_xlong(char *s, unsigned int i)
2817 {
2818 char *bak = s;
2819 *s = tohex((i >> 12) & 0xf);
2820 if (s != bak || *s != '0')
2821 ++s;
2822 *s = tohex((i >> 8) & 0xf);
2823 if (s != bak || *s != '0')
2824 ++s;
2825 *s = tohex((i >> 4) & 0xf);
2826 if (s != bak || *s != '0')
2827 ++s;
2828 *s = tohex(i & 0xf);
2829 return s - bak + 1;
2830 }
2831
2832 static unsigned int fmt_ip6(char *s, const char ip[16])
2833 {
2834 unsigned int len;
2835 unsigned int i;
2836 unsigned int temp;
2837 unsigned int compressing;
2838 int j;
2839
2840 len = 0;
2841 compressing = 0;
2842 for (j = 0; j < 16; j += 2) {
2843
2844 #ifdef V4MAPPEDPREFIX
2845 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2846 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2847 temp = strlen(s);
2848 return len + temp;
2849 }
2850 #endif
2851 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2852 (unsigned long)(unsigned char)ip[j + 1];
2853 if (temp == 0) {
2854 if (!compressing) {
2855 compressing = 1;
2856 if (j == 0) {
2857 *s++ = ':';
2858 ++len;
2859 }
2860 }
2861 } else {
2862 if (compressing) {
2863 compressing = 0;
2864 *s++ = ':';
2865 ++len;
2866 }
2867 i = fmt_xlong(s, temp);
2868 len += i;
2869 s += i;
2870 if (j < 14) {
2871 *s++ = ':';
2872 ++len;
2873 }
2874 }
2875 }
2876 if (compressing) {
2877 *s++ = ':';
2878 ++len;
2879 }
2880 *s = 0;
2881 return len;
2882 }
2883
2884 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2885 struct pktgen_dev *pkt_dev)
2886 {
2887 struct sk_buff *skb = NULL;
2888 __u8 *eth;
2889 struct udphdr *udph;
2890 int datalen;
2891 struct ipv6hdr *iph;
2892 struct pktgen_hdr *pgh = NULL;
2893 __be16 protocol = htons(ETH_P_IPV6);
2894 __be32 *mpls;
2895 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2896 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2897 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2898 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2899 u16 queue_map;
2900
2901 if (pkt_dev->nr_labels)
2902 protocol = htons(ETH_P_MPLS_UC);
2903
2904 if (pkt_dev->vlan_id != 0xffff)
2905 protocol = htons(ETH_P_8021Q);
2906
2907 /* Update any of the values, used when we're incrementing various
2908 * fields.
2909 */
2910 queue_map = pkt_dev->cur_queue_map;
2911 mod_cur_headers(pkt_dev);
2912
2913 skb = __netdev_alloc_skb(odev,
2914 pkt_dev->cur_pkt_size + 64
2915 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
2916 if (!skb) {
2917 sprintf(pkt_dev->result, "No memory");
2918 return NULL;
2919 }
2920
2921 skb_reserve(skb, 16);
2922
2923 /* Reserve for ethernet and IP header */
2924 eth = (__u8 *) skb_push(skb, 14);
2925 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2926 if (pkt_dev->nr_labels)
2927 mpls_push(mpls, pkt_dev);
2928
2929 if (pkt_dev->vlan_id != 0xffff) {
2930 if (pkt_dev->svlan_id != 0xffff) {
2931 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2932 *svlan_tci = build_tci(pkt_dev->svlan_id,
2933 pkt_dev->svlan_cfi,
2934 pkt_dev->svlan_p);
2935 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2936 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2937 }
2938 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2939 *vlan_tci = build_tci(pkt_dev->vlan_id,
2940 pkt_dev->vlan_cfi,
2941 pkt_dev->vlan_p);
2942 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2943 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2944 }
2945
2946 skb->network_header = skb->tail;
2947 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2948 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2949 skb_set_queue_mapping(skb, queue_map);
2950 iph = ipv6_hdr(skb);
2951 udph = udp_hdr(skb);
2952
2953 memcpy(eth, pkt_dev->hh, 12);
2954 *(__be16 *) &eth[12] = protocol;
2955
2956 /* Eth + IPh + UDPh + mpls */
2957 datalen = pkt_dev->cur_pkt_size - 14 -
2958 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2959 pkt_dev->pkt_overhead;
2960
2961 if (datalen < sizeof(struct pktgen_hdr)) {
2962 datalen = sizeof(struct pktgen_hdr);
2963 if (net_ratelimit())
2964 printk(KERN_INFO "pktgen: increased datalen to %d\n",
2965 datalen);
2966 }
2967
2968 udph->source = htons(pkt_dev->cur_udp_src);
2969 udph->dest = htons(pkt_dev->cur_udp_dst);
2970 udph->len = htons(datalen + sizeof(struct udphdr));
2971 udph->check = 0; /* No checksum */
2972
2973 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2974
2975 if (pkt_dev->traffic_class) {
2976 /* Version + traffic class + flow (0) */
2977 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2978 }
2979
2980 iph->hop_limit = 32;
2981
2982 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2983 iph->nexthdr = IPPROTO_UDP;
2984
2985 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2986 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2987
2988 skb->mac_header = (skb->network_header - ETH_HLEN -
2989 pkt_dev->pkt_overhead);
2990 skb->protocol = protocol;
2991 skb->dev = odev;
2992 skb->pkt_type = PACKET_HOST;
2993
2994 if (pkt_dev->nfrags <= 0)
2995 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2996 else {
2997 int frags = pkt_dev->nfrags;
2998 int i;
2999
3000 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
3001
3002 if (frags > MAX_SKB_FRAGS)
3003 frags = MAX_SKB_FRAGS;
3004 if (datalen > frags * PAGE_SIZE) {
3005 skb_put(skb, datalen - frags * PAGE_SIZE);
3006 datalen = frags * PAGE_SIZE;
3007 }
3008
3009 i = 0;
3010 while (datalen > 0) {
3011 struct page *page = alloc_pages(GFP_KERNEL, 0);
3012 skb_shinfo(skb)->frags[i].page = page;
3013 skb_shinfo(skb)->frags[i].page_offset = 0;
3014 skb_shinfo(skb)->frags[i].size =
3015 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
3016 datalen -= skb_shinfo(skb)->frags[i].size;
3017 skb->len += skb_shinfo(skb)->frags[i].size;
3018 skb->data_len += skb_shinfo(skb)->frags[i].size;
3019 i++;
3020 skb_shinfo(skb)->nr_frags = i;
3021 }
3022
3023 while (i < frags) {
3024 int rem;
3025
3026 if (i == 0)
3027 break;
3028
3029 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
3030 if (rem == 0)
3031 break;
3032
3033 skb_shinfo(skb)->frags[i - 1].size -= rem;
3034
3035 skb_shinfo(skb)->frags[i] =
3036 skb_shinfo(skb)->frags[i - 1];
3037 get_page(skb_shinfo(skb)->frags[i].page);
3038 skb_shinfo(skb)->frags[i].page =
3039 skb_shinfo(skb)->frags[i - 1].page;
3040 skb_shinfo(skb)->frags[i].page_offset +=
3041 skb_shinfo(skb)->frags[i - 1].size;
3042 skb_shinfo(skb)->frags[i].size = rem;
3043 i++;
3044 skb_shinfo(skb)->nr_frags = i;
3045 }
3046 }
3047
3048 /* Stamp the time, and sequence number,
3049 * convert them to network byte order
3050 * should we update cloned packets too ?
3051 */
3052 if (pgh) {
3053 struct timeval timestamp;
3054
3055 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
3056 pgh->seq_num = htonl(pkt_dev->seq_num);
3057
3058 do_gettimeofday(&timestamp);
3059 pgh->tv_sec = htonl(timestamp.tv_sec);
3060 pgh->tv_usec = htonl(timestamp.tv_usec);
3061 }
3062 /* pkt_dev->seq_num++; FF: you really mean this? */
3063
3064 return skb;
3065 }
3066
3067 static struct sk_buff *fill_packet(struct net_device *odev,
3068 struct pktgen_dev *pkt_dev)
3069 {
3070 if (pkt_dev->flags & F_IPV6)
3071 return fill_packet_ipv6(odev, pkt_dev);
3072 else
3073 return fill_packet_ipv4(odev, pkt_dev);
3074 }
3075
3076 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3077 {
3078 pkt_dev->seq_num = 1;
3079 pkt_dev->idle_acc = 0;
3080 pkt_dev->sofar = 0;
3081 pkt_dev->tx_bytes = 0;
3082 pkt_dev->errors = 0;
3083 }
3084
3085 /* Set up structure for sending pkts, clear counters */
3086
3087 static void pktgen_run(struct pktgen_thread *t)
3088 {
3089 struct pktgen_dev *pkt_dev;
3090 int started = 0;
3091
3092 pr_debug("pktgen: entering pktgen_run. %p\n", t);
3093
3094 if_lock(t);
3095 list_for_each_entry(pkt_dev, &t->if_list, list) {
3096
3097 /*
3098 * setup odev and create initial packet.
3099 */
3100 pktgen_setup_inject(pkt_dev);
3101
3102 if (pkt_dev->odev) {
3103 pktgen_clear_counters(pkt_dev);
3104 pkt_dev->running = 1; /* Cranke yeself! */
3105 pkt_dev->skb = NULL;
3106 pkt_dev->started_at =
3107 pkt_dev->next_tx = ktime_now();
3108
3109 set_pkt_overhead(pkt_dev);
3110
3111 strcpy(pkt_dev->result, "Starting");
3112 started++;
3113 } else
3114 strcpy(pkt_dev->result, "Error starting");
3115 }
3116 if_unlock(t);
3117 if (started)
3118 t->control &= ~(T_STOP);
3119 }
3120
3121 static void pktgen_stop_all_threads_ifs(void)
3122 {
3123 struct pktgen_thread *t;
3124
3125 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n");
3126
3127 mutex_lock(&pktgen_thread_lock);
3128
3129 list_for_each_entry(t, &pktgen_threads, th_list)
3130 t->control |= T_STOP;
3131
3132 mutex_unlock(&pktgen_thread_lock);
3133 }
3134
3135 static int thread_is_running(const struct pktgen_thread *t)
3136 {
3137 const struct pktgen_dev *pkt_dev;
3138
3139 list_for_each_entry(pkt_dev, &t->if_list, list)
3140 if (pkt_dev->running)
3141 return 1;
3142 return 0;
3143 }
3144
3145 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3146 {
3147 if_lock(t);
3148
3149 while (thread_is_running(t)) {
3150
3151 if_unlock(t);
3152
3153 msleep_interruptible(100);
3154
3155 if (signal_pending(current))
3156 goto signal;
3157 if_lock(t);
3158 }
3159 if_unlock(t);
3160 return 1;
3161 signal:
3162 return 0;
3163 }
3164
3165 static int pktgen_wait_all_threads_run(void)
3166 {
3167 struct pktgen_thread *t;
3168 int sig = 1;
3169
3170 mutex_lock(&pktgen_thread_lock);
3171
3172 list_for_each_entry(t, &pktgen_threads, th_list) {
3173 sig = pktgen_wait_thread_run(t);
3174 if (sig == 0)
3175 break;
3176 }
3177
3178 if (sig == 0)
3179 list_for_each_entry(t, &pktgen_threads, th_list)
3180 t->control |= (T_STOP);
3181
3182 mutex_unlock(&pktgen_thread_lock);
3183 return sig;
3184 }
3185
3186 static void pktgen_run_all_threads(void)
3187 {
3188 struct pktgen_thread *t;
3189
3190 pr_debug("pktgen: entering pktgen_run_all_threads.\n");
3191
3192 mutex_lock(&pktgen_thread_lock);
3193
3194 list_for_each_entry(t, &pktgen_threads, th_list)
3195 t->control |= (T_RUN);
3196
3197 mutex_unlock(&pktgen_thread_lock);
3198
3199 /* Propagate thread->control */
3200 schedule_timeout_interruptible(msecs_to_jiffies(125));
3201
3202 pktgen_wait_all_threads_run();
3203 }
3204
3205 static void pktgen_reset_all_threads(void)
3206 {
3207 struct pktgen_thread *t;
3208
3209 pr_debug("pktgen: entering pktgen_reset_all_threads.\n");
3210
3211 mutex_lock(&pktgen_thread_lock);
3212
3213 list_for_each_entry(t, &pktgen_threads, th_list)
3214 t->control |= (T_REMDEVALL);
3215
3216 mutex_unlock(&pktgen_thread_lock);
3217
3218 /* Propagate thread->control */
3219 schedule_timeout_interruptible(msecs_to_jiffies(125));
3220
3221 pktgen_wait_all_threads_run();
3222 }
3223
3224 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3225 {
3226 __u64 bps, mbps, pps;
3227 char *p = pkt_dev->result;
3228 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3229 pkt_dev->started_at);
3230 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3231
3232 p += sprintf(p, "OK: %llu(c%llu+d%llu) nsec, %llu (%dbyte,%dfrags)\n",
3233 (unsigned long long)ktime_to_us(elapsed),
3234 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3235 (unsigned long long)ktime_to_us(idle),
3236 (unsigned long long)pkt_dev->sofar,
3237 pkt_dev->cur_pkt_size, nr_frags);
3238
3239 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3240 ktime_to_ns(elapsed));
3241
3242 bps = pps * 8 * pkt_dev->cur_pkt_size;
3243
3244 mbps = bps;
3245 do_div(mbps, 1000000);
3246 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3247 (unsigned long long)pps,
3248 (unsigned long long)mbps,
3249 (unsigned long long)bps,
3250 (unsigned long long)pkt_dev->errors);
3251 }
3252
3253 /* Set stopped-at timer, remove from running list, do counters & statistics */
3254 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3255 {
3256 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3257
3258 if (!pkt_dev->running) {
3259 printk(KERN_WARNING "pktgen: interface: %s is already "
3260 "stopped\n", pkt_dev->odev->name);
3261 return -EINVAL;
3262 }
3263
3264 kfree_skb(pkt_dev->skb);
3265 pkt_dev->skb = NULL;
3266 pkt_dev->stopped_at = ktime_now();
3267 pkt_dev->running = 0;
3268
3269 show_results(pkt_dev, nr_frags);
3270
3271 return 0;
3272 }
3273
3274 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3275 {
3276 struct pktgen_dev *pkt_dev, *best = NULL;
3277
3278 if_lock(t);
3279
3280 list_for_each_entry(pkt_dev, &t->if_list, list) {
3281 if (!pkt_dev->running)
3282 continue;
3283 if (best == NULL)
3284 best = pkt_dev;
3285 else if (ktime_lt(pkt_dev->next_tx, best->next_tx))
3286 best = pkt_dev;
3287 }
3288 if_unlock(t);
3289 return best;
3290 }
3291
3292 static void pktgen_stop(struct pktgen_thread *t)
3293 {
3294 struct pktgen_dev *pkt_dev;
3295
3296 pr_debug("pktgen: entering pktgen_stop\n");
3297
3298 if_lock(t);
3299
3300 list_for_each_entry(pkt_dev, &t->if_list, list) {
3301 pktgen_stop_device(pkt_dev);
3302 }
3303
3304 if_unlock(t);
3305 }
3306
3307 /*
3308 * one of our devices needs to be removed - find it
3309 * and remove it
3310 */
3311 static void pktgen_rem_one_if(struct pktgen_thread *t)
3312 {
3313 struct list_head *q, *n;
3314 struct pktgen_dev *cur;
3315
3316 pr_debug("pktgen: entering pktgen_rem_one_if\n");
3317
3318 if_lock(t);
3319
3320 list_for_each_safe(q, n, &t->if_list) {
3321 cur = list_entry(q, struct pktgen_dev, list);
3322
3323 if (!cur->removal_mark)
3324 continue;
3325
3326 kfree_skb(cur->skb);
3327 cur->skb = NULL;
3328
3329 pktgen_remove_device(t, cur);
3330
3331 break;
3332 }
3333
3334 if_unlock(t);
3335 }
3336
3337 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3338 {
3339 struct list_head *q, *n;
3340 struct pktgen_dev *cur;
3341
3342 /* Remove all devices, free mem */
3343
3344 pr_debug("pktgen: entering pktgen_rem_all_ifs\n");
3345 if_lock(t);
3346
3347 list_for_each_safe(q, n, &t->if_list) {
3348 cur = list_entry(q, struct pktgen_dev, list);
3349
3350 kfree_skb(cur->skb);
3351 cur->skb = NULL;
3352
3353 pktgen_remove_device(t, cur);
3354 }
3355
3356 if_unlock(t);
3357 }
3358
3359 static void pktgen_rem_thread(struct pktgen_thread *t)
3360 {
3361 /* Remove from the thread list */
3362
3363 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3364
3365 mutex_lock(&pktgen_thread_lock);
3366
3367 list_del(&t->th_list);
3368
3369 mutex_unlock(&pktgen_thread_lock);
3370 }
3371
3372 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3373 {
3374 ktime_t idle_start = ktime_now();
3375 schedule();
3376 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3377 }
3378
3379 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3380 {
3381 ktime_t idle_start = ktime_now();
3382
3383 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3384 if (signal_pending(current))
3385 break;
3386
3387 if (need_resched())
3388 pktgen_resched(pkt_dev);
3389 else
3390 cpu_relax();
3391 }
3392 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3393 }
3394
3395 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3396 {
3397 struct net_device *odev = pkt_dev->odev;
3398 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3399 = odev->netdev_ops->ndo_start_xmit;
3400 struct netdev_queue *txq;
3401 u16 queue_map;
3402 int ret;
3403
3404 /* If device is offline, then don't send */
3405 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3406 pktgen_stop_device(pkt_dev);
3407 return;
3408 }
3409
3410 /* This is max DELAY, this has special meaning of
3411 * "never transmit"
3412 */
3413 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3414 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX);
3415 return;
3416 }
3417
3418 /* If no skb or clone count exhausted then get new one */
3419 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3420 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3421 /* build a new pkt */
3422 kfree_skb(pkt_dev->skb);
3423
3424 pkt_dev->skb = fill_packet(odev, pkt_dev);
3425 if (pkt_dev->skb == NULL) {
3426 printk(KERN_ERR "pktgen: ERROR: couldn't "
3427 "allocate skb in fill_packet.\n");
3428 schedule();
3429 pkt_dev->clone_count--; /* back out increment, OOM */
3430 return;
3431 }
3432
3433 pkt_dev->allocated_skbs++;
3434 pkt_dev->clone_count = 0; /* reset counter */
3435 }
3436
3437 if (pkt_dev->delay && pkt_dev->last_ok)
3438 spin(pkt_dev, pkt_dev->next_tx);
3439
3440 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3441 txq = netdev_get_tx_queue(odev, queue_map);
3442
3443 __netif_tx_lock_bh(txq);
3444 atomic_inc(&(pkt_dev->skb->users));
3445
3446 if (unlikely(netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq)))
3447 ret = NETDEV_TX_BUSY;
3448 else
3449 ret = (*xmit)(pkt_dev->skb, odev);
3450
3451 switch (ret) {
3452 case NETDEV_TX_OK:
3453 txq_trans_update(txq);
3454 pkt_dev->last_ok = 1;
3455 pkt_dev->sofar++;
3456 pkt_dev->seq_num++;
3457 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size;
3458 break;
3459 default: /* Drivers are not supposed to return other values! */
3460 if (net_ratelimit())
3461 pr_info("pktgen: %s xmit error: %d\n",
3462 odev->name, ret);
3463 pkt_dev->errors++;
3464 /* fallthru */
3465 case NETDEV_TX_LOCKED:
3466 case NETDEV_TX_BUSY:
3467 /* Retry it next time */
3468 atomic_dec(&(pkt_dev->skb->users));
3469 pkt_dev->last_ok = 0;
3470 }
3471 __netif_tx_unlock_bh(txq);
3472
3473 /* If pkt_dev->count is zero, then run forever */
3474 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3475 pktgen_wait_for_skb(pkt_dev);
3476
3477 /* Done with this */
3478 pktgen_stop_device(pkt_dev);
3479 }
3480 }
3481
3482 /*
3483 * Main loop of the thread goes here
3484 */
3485
3486 static int pktgen_thread_worker(void *arg)
3487 {
3488 DEFINE_WAIT(wait);
3489 struct pktgen_thread *t = arg;
3490 struct pktgen_dev *pkt_dev = NULL;
3491 int cpu = t->cpu;
3492
3493 BUG_ON(smp_processor_id() != cpu);
3494
3495 init_waitqueue_head(&t->queue);
3496 complete(&t->start_done);
3497
3498 pr_debug("pktgen: starting pktgen/%d: pid=%d\n",
3499 cpu, task_pid_nr(current));
3500
3501 set_current_state(TASK_INTERRUPTIBLE);
3502
3503 set_freezable();
3504
3505 while (!kthread_should_stop()) {
3506 pkt_dev = next_to_run(t);
3507
3508 if (unlikely(!pkt_dev && t->control == 0)) {
3509 wait_event_interruptible_timeout(t->queue,
3510 t->control != 0,
3511 HZ/10);
3512 continue;
3513 }
3514
3515 __set_current_state(TASK_RUNNING);
3516
3517 if (likely(pkt_dev)) {
3518 pktgen_xmit(pkt_dev);
3519
3520 if (need_resched())
3521 pktgen_resched(pkt_dev);
3522 else
3523 cpu_relax();
3524 }
3525
3526 if (t->control & T_STOP) {
3527 pktgen_stop(t);
3528 t->control &= ~(T_STOP);
3529 }
3530
3531 if (t->control & T_RUN) {
3532 pktgen_run(t);
3533 t->control &= ~(T_RUN);
3534 }
3535
3536 if (t->control & T_REMDEVALL) {
3537 pktgen_rem_all_ifs(t);
3538 t->control &= ~(T_REMDEVALL);
3539 }
3540
3541 if (t->control & T_REMDEV) {
3542 pktgen_rem_one_if(t);
3543 t->control &= ~(T_REMDEV);
3544 }
3545
3546 try_to_freeze();
3547
3548 set_current_state(TASK_INTERRUPTIBLE);
3549 }
3550
3551 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm);
3552 pktgen_stop(t);
3553
3554 pr_debug("pktgen: %s removing all device\n", t->tsk->comm);
3555 pktgen_rem_all_ifs(t);
3556
3557 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm);
3558 pktgen_rem_thread(t);
3559
3560 return 0;
3561 }
3562
3563 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3564 const char *ifname)
3565 {
3566 struct pktgen_dev *p, *pkt_dev = NULL;
3567 if_lock(t);
3568
3569 list_for_each_entry(p, &t->if_list, list)
3570 if (strncmp(p->odev->name, ifname, IFNAMSIZ) == 0) {
3571 pkt_dev = p;
3572 break;
3573 }
3574
3575 if_unlock(t);
3576 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev);
3577 return pkt_dev;
3578 }
3579
3580 /*
3581 * Adds a dev at front of if_list.
3582 */
3583
3584 static int add_dev_to_thread(struct pktgen_thread *t,
3585 struct pktgen_dev *pkt_dev)
3586 {
3587 int rv = 0;
3588
3589 if_lock(t);
3590
3591 if (pkt_dev->pg_thread) {
3592 printk(KERN_ERR "pktgen: ERROR: already assigned "
3593 "to a thread.\n");
3594 rv = -EBUSY;
3595 goto out;
3596 }
3597
3598 list_add(&pkt_dev->list, &t->if_list);
3599 pkt_dev->pg_thread = t;
3600 pkt_dev->running = 0;
3601
3602 out:
3603 if_unlock(t);
3604 return rv;
3605 }
3606
3607 /* Called under thread lock */
3608
3609 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3610 {
3611 struct pktgen_dev *pkt_dev;
3612 int err;
3613
3614 /* We don't allow a device to be on several threads */
3615
3616 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3617 if (pkt_dev) {
3618 printk(KERN_ERR "pktgen: ERROR: interface already used.\n");
3619 return -EBUSY;
3620 }
3621
3622 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
3623 if (!pkt_dev)
3624 return -ENOMEM;
3625
3626 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state));
3627 if (pkt_dev->flows == NULL) {
3628 kfree(pkt_dev);
3629 return -ENOMEM;
3630 }
3631 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3632
3633 pkt_dev->removal_mark = 0;
3634 pkt_dev->min_pkt_size = ETH_ZLEN;
3635 pkt_dev->max_pkt_size = ETH_ZLEN;
3636 pkt_dev->nfrags = 0;
3637 pkt_dev->clone_skb = pg_clone_skb_d;
3638 pkt_dev->delay = pg_delay_d;
3639 pkt_dev->count = pg_count_d;
3640 pkt_dev->sofar = 0;
3641 pkt_dev->udp_src_min = 9; /* sink port */
3642 pkt_dev->udp_src_max = 9;
3643 pkt_dev->udp_dst_min = 9;
3644 pkt_dev->udp_dst_max = 9;
3645
3646 pkt_dev->vlan_p = 0;
3647 pkt_dev->vlan_cfi = 0;
3648 pkt_dev->vlan_id = 0xffff;
3649 pkt_dev->svlan_p = 0;
3650 pkt_dev->svlan_cfi = 0;
3651 pkt_dev->svlan_id = 0xffff;
3652
3653 err = pktgen_setup_dev(pkt_dev, ifname);
3654 if (err)
3655 goto out1;
3656
3657 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3658 &pktgen_if_fops, pkt_dev);
3659 if (!pkt_dev->entry) {
3660 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3661 PG_PROC_DIR, ifname);
3662 err = -EINVAL;
3663 goto out2;
3664 }
3665 #ifdef CONFIG_XFRM
3666 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3667 pkt_dev->ipsproto = IPPROTO_ESP;
3668 #endif
3669
3670 return add_dev_to_thread(t, pkt_dev);
3671 out2:
3672 dev_put(pkt_dev->odev);
3673 out1:
3674 #ifdef CONFIG_XFRM
3675 free_SAs(pkt_dev);
3676 #endif
3677 vfree(pkt_dev->flows);
3678 kfree(pkt_dev);
3679 return err;
3680 }
3681
3682 static int __init pktgen_create_thread(int cpu)
3683 {
3684 struct pktgen_thread *t;
3685 struct proc_dir_entry *pe;
3686 struct task_struct *p;
3687
3688 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL);
3689 if (!t) {
3690 printk(KERN_ERR "pktgen: ERROR: out of memory, can't "
3691 "create new thread.\n");
3692 return -ENOMEM;
3693 }
3694
3695 spin_lock_init(&t->if_lock);
3696 t->cpu = cpu;
3697
3698 INIT_LIST_HEAD(&t->if_list);
3699
3700 list_add_tail(&t->th_list, &pktgen_threads);
3701 init_completion(&t->start_done);
3702
3703 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu);
3704 if (IS_ERR(p)) {
3705 printk(KERN_ERR "pktgen: kernel_thread() failed "
3706 "for cpu %d\n", t->cpu);
3707 list_del(&t->th_list);
3708 kfree(t);
3709 return PTR_ERR(p);
3710 }
3711 kthread_bind(p, cpu);
3712 t->tsk = p;
3713
3714 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3715 &pktgen_thread_fops, t);
3716 if (!pe) {
3717 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3718 PG_PROC_DIR, t->tsk->comm);
3719 kthread_stop(p);
3720 list_del(&t->th_list);
3721 kfree(t);
3722 return -EINVAL;
3723 }
3724
3725 wake_up_process(p);
3726 wait_for_completion(&t->start_done);
3727
3728 return 0;
3729 }
3730
3731 /*
3732 * Removes a device from the thread if_list.
3733 */
3734 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3735 struct pktgen_dev *pkt_dev)
3736 {
3737 struct list_head *q, *n;
3738 struct pktgen_dev *p;
3739
3740 list_for_each_safe(q, n, &t->if_list) {
3741 p = list_entry(q, struct pktgen_dev, list);
3742 if (p == pkt_dev)
3743 list_del(&p->list);
3744 }
3745 }
3746
3747 static int pktgen_remove_device(struct pktgen_thread *t,
3748 struct pktgen_dev *pkt_dev)
3749 {
3750
3751 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev);
3752
3753 if (pkt_dev->running) {
3754 printk(KERN_WARNING "pktgen: WARNING: trying to remove a "
3755 "running interface, stopping it now.\n");
3756 pktgen_stop_device(pkt_dev);
3757 }
3758
3759 /* Dis-associate from the interface */
3760
3761 if (pkt_dev->odev) {
3762 dev_put(pkt_dev->odev);
3763 pkt_dev->odev = NULL;
3764 }
3765
3766 /* And update the thread if_list */
3767
3768 _rem_dev_from_if_list(t, pkt_dev);
3769
3770 if (pkt_dev->entry)
3771 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3772
3773 #ifdef CONFIG_XFRM
3774 free_SAs(pkt_dev);
3775 #endif
3776 vfree(pkt_dev->flows);
3777 kfree(pkt_dev);
3778 return 0;
3779 }
3780
3781 static int __init pg_init(void)
3782 {
3783 int cpu;
3784 struct proc_dir_entry *pe;
3785
3786 printk(KERN_INFO "%s", version);
3787
3788 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3789 if (!pg_proc_dir)
3790 return -ENODEV;
3791
3792 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3793 if (pe == NULL) {
3794 printk(KERN_ERR "pktgen: ERROR: cannot create %s "
3795 "procfs entry.\n", PGCTRL);
3796 proc_net_remove(&init_net, PG_PROC_DIR);
3797 return -EINVAL;
3798 }
3799
3800 /* Register us to receive netdevice events */
3801 register_netdevice_notifier(&pktgen_notifier_block);
3802
3803 for_each_online_cpu(cpu) {
3804 int err;
3805
3806 err = pktgen_create_thread(cpu);
3807 if (err)
3808 printk(KERN_WARNING "pktgen: WARNING: Cannot create "
3809 "thread for cpu %d (%d)\n", cpu, err);
3810 }
3811
3812 if (list_empty(&pktgen_threads)) {
3813 printk(KERN_ERR "pktgen: ERROR: Initialization failed for "
3814 "all threads\n");
3815 unregister_netdevice_notifier(&pktgen_notifier_block);
3816 remove_proc_entry(PGCTRL, pg_proc_dir);
3817 proc_net_remove(&init_net, PG_PROC_DIR);
3818 return -ENODEV;
3819 }
3820
3821 return 0;
3822 }
3823
3824 static void __exit pg_cleanup(void)
3825 {
3826 struct pktgen_thread *t;
3827 struct list_head *q, *n;
3828 wait_queue_head_t queue;
3829 init_waitqueue_head(&queue);
3830
3831 /* Stop all interfaces & threads */
3832
3833 list_for_each_safe(q, n, &pktgen_threads) {
3834 t = list_entry(q, struct pktgen_thread, th_list);
3835 kthread_stop(t->tsk);
3836 kfree(t);
3837 }
3838
3839 /* Un-register us from receiving netdevice events */
3840 unregister_netdevice_notifier(&pktgen_notifier_block);
3841
3842 /* Clean up proc file system */
3843 remove_proc_entry(PGCTRL, pg_proc_dir);
3844 proc_net_remove(&init_net, PG_PROC_DIR);
3845 }
3846
3847 module_init(pg_init);
3848 module_exit(pg_cleanup);
3849
3850 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3851 MODULE_DESCRIPTION("Packet Generator tool");
3852 MODULE_LICENSE("GPL");
3853 MODULE_VERSION(VERSION);
3854 module_param(pg_count_d, int, 0);
3855 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3856 module_param(pg_delay_d, int, 0);
3857 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3858 module_param(pg_clone_skb_d, int, 0);
3859 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3860 module_param(debug, int, 0);
3861 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
Linux kernel - Deliverables
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