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Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
[mirror_ubuntu-zesty-kernel.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
255 /* runtime counters relating to clone_skb */
256
257 __u64 allocated_skbs;
258 __u32 clone_count;
259 int last_ok; /* Was last skb sent?
260 * Or a failed transmit of some sort?
261 * This will keep sequence numbers in order
262 */
263 ktime_t next_tx;
264 ktime_t started_at;
265 ktime_t stopped_at;
266 u64 idle_acc; /* nano-seconds */
267
268 __u32 seq_num;
269
270 int clone_skb; /*
271 * Use multiple SKBs during packet gen.
272 * If this number is greater than 1, then
273 * that many copies of the same packet will be
274 * sent before a new packet is allocated.
275 * If you want to send 1024 identical packets
276 * before creating a new packet,
277 * set clone_skb to 1024.
278 */
279
280 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
281 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
282 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
283 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
284
285 struct in6_addr in6_saddr;
286 struct in6_addr in6_daddr;
287 struct in6_addr cur_in6_daddr;
288 struct in6_addr cur_in6_saddr;
289 /* For ranges */
290 struct in6_addr min_in6_daddr;
291 struct in6_addr max_in6_daddr;
292 struct in6_addr min_in6_saddr;
293 struct in6_addr max_in6_saddr;
294
295 /* If we're doing ranges, random or incremental, then this
296 * defines the min/max for those ranges.
297 */
298 __be32 saddr_min; /* inclusive, source IP address */
299 __be32 saddr_max; /* exclusive, source IP address */
300 __be32 daddr_min; /* inclusive, dest IP address */
301 __be32 daddr_max; /* exclusive, dest IP address */
302
303 __u16 udp_src_min; /* inclusive, source UDP port */
304 __u16 udp_src_max; /* exclusive, source UDP port */
305 __u16 udp_dst_min; /* inclusive, dest UDP port */
306 __u16 udp_dst_max; /* exclusive, dest UDP port */
307
308 /* DSCP + ECN */
309 __u8 tos; /* six MSB of (former) IPv4 TOS
310 are for dscp codepoint */
311 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
312 (see RFC 3260, sec. 4) */
313
314 /* MPLS */
315 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
316 __be32 labels[MAX_MPLS_LABELS];
317
318 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
319 __u8 vlan_p;
320 __u8 vlan_cfi;
321 __u16 vlan_id; /* 0xffff means no vlan tag */
322
323 __u8 svlan_p;
324 __u8 svlan_cfi;
325 __u16 svlan_id; /* 0xffff means no svlan tag */
326
327 __u32 src_mac_count; /* How many MACs to iterate through */
328 __u32 dst_mac_count; /* How many MACs to iterate through */
329
330 unsigned char dst_mac[ETH_ALEN];
331 unsigned char src_mac[ETH_ALEN];
332
333 __u32 cur_dst_mac_offset;
334 __u32 cur_src_mac_offset;
335 __be32 cur_saddr;
336 __be32 cur_daddr;
337 __u16 ip_id;
338 __u16 cur_udp_dst;
339 __u16 cur_udp_src;
340 __u16 cur_queue_map;
341 __u32 cur_pkt_size;
342 __u32 last_pkt_size;
343
344 __u8 hh[14];
345 /* = {
346 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
347
348 We fill in SRC address later
349 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
350 0x08, 0x00
351 };
352 */
353 __u16 pad; /* pad out the hh struct to an even 16 bytes */
354
355 struct sk_buff *skb; /* skb we are to transmit next, used for when we
356 * are transmitting the same one multiple times
357 */
358 struct net_device *odev; /* The out-going device.
359 * Note that the device should have it's
360 * pg_info pointer pointing back to this
361 * device.
362 * Set when the user specifies the out-going
363 * device name (not when the inject is
364 * started as it used to do.)
365 */
366 char odevname[32];
367 struct flow_state *flows;
368 unsigned cflows; /* Concurrent flows (config) */
369 unsigned lflow; /* Flow length (config) */
370 unsigned nflows; /* accumulated flows (stats) */
371 unsigned curfl; /* current sequenced flow (state)*/
372
373 u16 queue_map_min;
374 u16 queue_map_max;
375
376 #ifdef CONFIG_XFRM
377 __u8 ipsmode; /* IPSEC mode (config) */
378 __u8 ipsproto; /* IPSEC type (config) */
379 #endif
380 char result[512];
381 };
382
383 struct pktgen_hdr {
384 __be32 pgh_magic;
385 __be32 seq_num;
386 __be32 tv_sec;
387 __be32 tv_usec;
388 };
389
390 struct pktgen_thread {
391 spinlock_t if_lock; /* for list of devices */
392 struct list_head if_list; /* All device here */
393 struct list_head th_list;
394 struct task_struct *tsk;
395 char result[512];
396
397 /* Field for thread to receive "posted" events terminate,
398 stop ifs etc. */
399
400 u32 control;
401 int cpu;
402
403 wait_queue_head_t queue;
404 struct completion start_done;
405 };
406
407 #define REMOVE 1
408 #define FIND 0
409
410 static inline ktime_t ktime_now(void)
411 {
412 struct timespec ts;
413 ktime_get_ts(&ts);
414
415 return timespec_to_ktime(ts);
416 }
417
418 /* This works even if 32 bit because of careful byte order choice */
419 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2)
420 {
421 return cmp1.tv64 < cmp2.tv64;
422 }
423
424 static const char version[] =
425 "pktgen " VERSION ": Packet Generator for packet performance testing.\n";
426
427 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
428 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
429 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
430 const char *ifname, bool exact);
431 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
432 static void pktgen_run_all_threads(void);
433 static void pktgen_reset_all_threads(void);
434 static void pktgen_stop_all_threads_ifs(void);
435
436 static void pktgen_stop(struct pktgen_thread *t);
437 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
438
439 static unsigned int scan_ip6(const char *s, char ip[16]);
440 static unsigned int fmt_ip6(char *s, const char ip[16]);
441
442 /* Module parameters, defaults. */
443 static int pg_count_d __read_mostly = 1000;
444 static int pg_delay_d __read_mostly;
445 static int pg_clone_skb_d __read_mostly;
446 static int debug __read_mostly;
447
448 static DEFINE_MUTEX(pktgen_thread_lock);
449 static LIST_HEAD(pktgen_threads);
450
451 static struct notifier_block pktgen_notifier_block = {
452 .notifier_call = pktgen_device_event,
453 };
454
455 /*
456 * /proc handling functions
457 *
458 */
459
460 static int pgctrl_show(struct seq_file *seq, void *v)
461 {
462 seq_puts(seq, version);
463 return 0;
464 }
465
466 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
467 size_t count, loff_t *ppos)
468 {
469 int err = 0;
470 char data[128];
471
472 if (!capable(CAP_NET_ADMIN)) {
473 err = -EPERM;
474 goto out;
475 }
476
477 if (count > sizeof(data))
478 count = sizeof(data);
479
480 if (copy_from_user(data, buf, count)) {
481 err = -EFAULT;
482 goto out;
483 }
484 data[count - 1] = 0; /* Make string */
485
486 if (!strcmp(data, "stop"))
487 pktgen_stop_all_threads_ifs();
488
489 else if (!strcmp(data, "start"))
490 pktgen_run_all_threads();
491
492 else if (!strcmp(data, "reset"))
493 pktgen_reset_all_threads();
494
495 else
496 printk(KERN_WARNING "pktgen: Unknown command: %s\n", data);
497
498 err = count;
499
500 out:
501 return err;
502 }
503
504 static int pgctrl_open(struct inode *inode, struct file *file)
505 {
506 return single_open(file, pgctrl_show, PDE(inode)->data);
507 }
508
509 static const struct file_operations pktgen_fops = {
510 .owner = THIS_MODULE,
511 .open = pgctrl_open,
512 .read = seq_read,
513 .llseek = seq_lseek,
514 .write = pgctrl_write,
515 .release = single_release,
516 };
517
518 static int pktgen_if_show(struct seq_file *seq, void *v)
519 {
520 const struct pktgen_dev *pkt_dev = seq->private;
521 ktime_t stopped;
522 u64 idle;
523
524 seq_printf(seq,
525 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
526 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
527 pkt_dev->max_pkt_size);
528
529 seq_printf(seq,
530 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
531 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
532 pkt_dev->clone_skb, pkt_dev->odevname);
533
534 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
535 pkt_dev->lflow);
536
537 seq_printf(seq,
538 " queue_map_min: %u queue_map_max: %u\n",
539 pkt_dev->queue_map_min,
540 pkt_dev->queue_map_max);
541
542 if (pkt_dev->flags & F_IPV6) {
543 char b1[128], b2[128], b3[128];
544 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
545 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
546 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
547 seq_printf(seq,
548 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
549 b2, b3);
550
551 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
552 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
553 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
554 seq_printf(seq,
555 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
556 b2, b3);
557
558 } else {
559 seq_printf(seq,
560 " dst_min: %s dst_max: %s\n",
561 pkt_dev->dst_min, pkt_dev->dst_max);
562 seq_printf(seq,
563 " src_min: %s src_max: %s\n",
564 pkt_dev->src_min, pkt_dev->src_max);
565 }
566
567 seq_puts(seq, " src_mac: ");
568
569 seq_printf(seq, "%pM ",
570 is_zero_ether_addr(pkt_dev->src_mac) ?
571 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
572
573 seq_printf(seq, "dst_mac: ");
574 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
575
576 seq_printf(seq,
577 " udp_src_min: %d udp_src_max: %d"
578 " udp_dst_min: %d udp_dst_max: %d\n",
579 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
580 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
581
582 seq_printf(seq,
583 " src_mac_count: %d dst_mac_count: %d\n",
584 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
585
586 if (pkt_dev->nr_labels) {
587 unsigned i;
588 seq_printf(seq, " mpls: ");
589 for (i = 0; i < pkt_dev->nr_labels; i++)
590 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
591 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
592 }
593
594 if (pkt_dev->vlan_id != 0xffff)
595 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
596 pkt_dev->vlan_id, pkt_dev->vlan_p,
597 pkt_dev->vlan_cfi);
598
599 if (pkt_dev->svlan_id != 0xffff)
600 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
601 pkt_dev->svlan_id, pkt_dev->svlan_p,
602 pkt_dev->svlan_cfi);
603
604 if (pkt_dev->tos)
605 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
606
607 if (pkt_dev->traffic_class)
608 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
609
610 seq_printf(seq, " Flags: ");
611
612 if (pkt_dev->flags & F_IPV6)
613 seq_printf(seq, "IPV6 ");
614
615 if (pkt_dev->flags & F_IPSRC_RND)
616 seq_printf(seq, "IPSRC_RND ");
617
618 if (pkt_dev->flags & F_IPDST_RND)
619 seq_printf(seq, "IPDST_RND ");
620
621 if (pkt_dev->flags & F_TXSIZE_RND)
622 seq_printf(seq, "TXSIZE_RND ");
623
624 if (pkt_dev->flags & F_UDPSRC_RND)
625 seq_printf(seq, "UDPSRC_RND ");
626
627 if (pkt_dev->flags & F_UDPDST_RND)
628 seq_printf(seq, "UDPDST_RND ");
629
630 if (pkt_dev->flags & F_MPLS_RND)
631 seq_printf(seq, "MPLS_RND ");
632
633 if (pkt_dev->flags & F_QUEUE_MAP_RND)
634 seq_printf(seq, "QUEUE_MAP_RND ");
635
636 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
637 seq_printf(seq, "QUEUE_MAP_CPU ");
638
639 if (pkt_dev->cflows) {
640 if (pkt_dev->flags & F_FLOW_SEQ)
641 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
642 else
643 seq_printf(seq, "FLOW_RND ");
644 }
645
646 #ifdef CONFIG_XFRM
647 if (pkt_dev->flags & F_IPSEC_ON)
648 seq_printf(seq, "IPSEC ");
649 #endif
650
651 if (pkt_dev->flags & F_MACSRC_RND)
652 seq_printf(seq, "MACSRC_RND ");
653
654 if (pkt_dev->flags & F_MACDST_RND)
655 seq_printf(seq, "MACDST_RND ");
656
657 if (pkt_dev->flags & F_VID_RND)
658 seq_printf(seq, "VID_RND ");
659
660 if (pkt_dev->flags & F_SVID_RND)
661 seq_printf(seq, "SVID_RND ");
662
663 seq_puts(seq, "\n");
664
665 /* not really stopped, more like last-running-at */
666 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at;
667 idle = pkt_dev->idle_acc;
668 do_div(idle, NSEC_PER_USEC);
669
670 seq_printf(seq,
671 "Current:\n pkts-sofar: %llu errors: %llu\n",
672 (unsigned long long)pkt_dev->sofar,
673 (unsigned long long)pkt_dev->errors);
674
675 seq_printf(seq,
676 " started: %lluus stopped: %lluus idle: %lluus\n",
677 (unsigned long long) ktime_to_us(pkt_dev->started_at),
678 (unsigned long long) ktime_to_us(stopped),
679 (unsigned long long) idle);
680
681 seq_printf(seq,
682 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
683 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
684 pkt_dev->cur_src_mac_offset);
685
686 if (pkt_dev->flags & F_IPV6) {
687 char b1[128], b2[128];
688 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
689 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
690 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
691 } else
692 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
693 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
694
695 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
696 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
697
698 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
699
700 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
701
702 if (pkt_dev->result[0])
703 seq_printf(seq, "Result: %s\n", pkt_dev->result);
704 else
705 seq_printf(seq, "Result: Idle\n");
706
707 return 0;
708 }
709
710
711 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
712 __u32 *num)
713 {
714 int i = 0;
715 *num = 0;
716
717 for (; i < maxlen; i++) {
718 char c;
719 *num <<= 4;
720 if (get_user(c, &user_buffer[i]))
721 return -EFAULT;
722 if ((c >= '0') && (c <= '9'))
723 *num |= c - '0';
724 else if ((c >= 'a') && (c <= 'f'))
725 *num |= c - 'a' + 10;
726 else if ((c >= 'A') && (c <= 'F'))
727 *num |= c - 'A' + 10;
728 else
729 break;
730 }
731 return i;
732 }
733
734 static int count_trail_chars(const char __user * user_buffer,
735 unsigned int maxlen)
736 {
737 int i;
738
739 for (i = 0; i < maxlen; i++) {
740 char c;
741 if (get_user(c, &user_buffer[i]))
742 return -EFAULT;
743 switch (c) {
744 case '\"':
745 case '\n':
746 case '\r':
747 case '\t':
748 case ' ':
749 case '=':
750 break;
751 default:
752 goto done;
753 }
754 }
755 done:
756 return i;
757 }
758
759 static unsigned long num_arg(const char __user * user_buffer,
760 unsigned long maxlen, unsigned long *num)
761 {
762 int i = 0;
763 *num = 0;
764
765 for (; i < maxlen; i++) {
766 char c;
767 if (get_user(c, &user_buffer[i]))
768 return -EFAULT;
769 if ((c >= '0') && (c <= '9')) {
770 *num *= 10;
771 *num += c - '0';
772 } else
773 break;
774 }
775 return i;
776 }
777
778 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
779 {
780 int i = 0;
781
782 for (; i < maxlen; i++) {
783 char c;
784 if (get_user(c, &user_buffer[i]))
785 return -EFAULT;
786 switch (c) {
787 case '\"':
788 case '\n':
789 case '\r':
790 case '\t':
791 case ' ':
792 goto done_str;
793 break;
794 default:
795 break;
796 }
797 }
798 done_str:
799 return i;
800 }
801
802 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
803 {
804 unsigned n = 0;
805 char c;
806 ssize_t i = 0;
807 int len;
808
809 pkt_dev->nr_labels = 0;
810 do {
811 __u32 tmp;
812 len = hex32_arg(&buffer[i], 8, &tmp);
813 if (len <= 0)
814 return len;
815 pkt_dev->labels[n] = htonl(tmp);
816 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
817 pkt_dev->flags |= F_MPLS_RND;
818 i += len;
819 if (get_user(c, &buffer[i]))
820 return -EFAULT;
821 i++;
822 n++;
823 if (n >= MAX_MPLS_LABELS)
824 return -E2BIG;
825 } while (c == ',');
826
827 pkt_dev->nr_labels = n;
828 return i;
829 }
830
831 static ssize_t pktgen_if_write(struct file *file,
832 const char __user * user_buffer, size_t count,
833 loff_t * offset)
834 {
835 struct seq_file *seq = (struct seq_file *)file->private_data;
836 struct pktgen_dev *pkt_dev = seq->private;
837 int i = 0, max, len;
838 char name[16], valstr[32];
839 unsigned long value = 0;
840 char *pg_result = NULL;
841 int tmp = 0;
842 char buf[128];
843
844 pg_result = &(pkt_dev->result[0]);
845
846 if (count < 1) {
847 printk(KERN_WARNING "pktgen: wrong command format\n");
848 return -EINVAL;
849 }
850
851 max = count - i;
852 tmp = count_trail_chars(&user_buffer[i], max);
853 if (tmp < 0) {
854 printk(KERN_WARNING "pktgen: illegal format\n");
855 return tmp;
856 }
857 i += tmp;
858
859 /* Read variable name */
860
861 len = strn_len(&user_buffer[i], sizeof(name) - 1);
862 if (len < 0)
863 return len;
864
865 memset(name, 0, sizeof(name));
866 if (copy_from_user(name, &user_buffer[i], len))
867 return -EFAULT;
868 i += len;
869
870 max = count - i;
871 len = count_trail_chars(&user_buffer[i], max);
872 if (len < 0)
873 return len;
874
875 i += len;
876
877 if (debug) {
878 char tb[count + 1];
879 if (copy_from_user(tb, user_buffer, count))
880 return -EFAULT;
881 tb[count] = 0;
882 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name,
883 (unsigned long)count, tb);
884 }
885
886 if (!strcmp(name, "min_pkt_size")) {
887 len = num_arg(&user_buffer[i], 10, &value);
888 if (len < 0)
889 return len;
890
891 i += len;
892 if (value < 14 + 20 + 8)
893 value = 14 + 20 + 8;
894 if (value != pkt_dev->min_pkt_size) {
895 pkt_dev->min_pkt_size = value;
896 pkt_dev->cur_pkt_size = value;
897 }
898 sprintf(pg_result, "OK: min_pkt_size=%u",
899 pkt_dev->min_pkt_size);
900 return count;
901 }
902
903 if (!strcmp(name, "max_pkt_size")) {
904 len = num_arg(&user_buffer[i], 10, &value);
905 if (len < 0)
906 return len;
907
908 i += len;
909 if (value < 14 + 20 + 8)
910 value = 14 + 20 + 8;
911 if (value != pkt_dev->max_pkt_size) {
912 pkt_dev->max_pkt_size = value;
913 pkt_dev->cur_pkt_size = value;
914 }
915 sprintf(pg_result, "OK: max_pkt_size=%u",
916 pkt_dev->max_pkt_size);
917 return count;
918 }
919
920 /* Shortcut for min = max */
921
922 if (!strcmp(name, "pkt_size")) {
923 len = num_arg(&user_buffer[i], 10, &value);
924 if (len < 0)
925 return len;
926
927 i += len;
928 if (value < 14 + 20 + 8)
929 value = 14 + 20 + 8;
930 if (value != pkt_dev->min_pkt_size) {
931 pkt_dev->min_pkt_size = value;
932 pkt_dev->max_pkt_size = value;
933 pkt_dev->cur_pkt_size = value;
934 }
935 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
936 return count;
937 }
938
939 if (!strcmp(name, "debug")) {
940 len = num_arg(&user_buffer[i], 10, &value);
941 if (len < 0)
942 return len;
943
944 i += len;
945 debug = value;
946 sprintf(pg_result, "OK: debug=%u", debug);
947 return count;
948 }
949
950 if (!strcmp(name, "frags")) {
951 len = num_arg(&user_buffer[i], 10, &value);
952 if (len < 0)
953 return len;
954
955 i += len;
956 pkt_dev->nfrags = value;
957 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
958 return count;
959 }
960 if (!strcmp(name, "delay")) {
961 len = num_arg(&user_buffer[i], 10, &value);
962 if (len < 0)
963 return len;
964
965 i += len;
966 if (value == 0x7FFFFFFF)
967 pkt_dev->delay = ULLONG_MAX;
968 else
969 pkt_dev->delay = (u64)value;
970
971 sprintf(pg_result, "OK: delay=%llu",
972 (unsigned long long) pkt_dev->delay);
973 return count;
974 }
975 if (!strcmp(name, "udp_src_min")) {
976 len = num_arg(&user_buffer[i], 10, &value);
977 if (len < 0)
978 return len;
979
980 i += len;
981 if (value != pkt_dev->udp_src_min) {
982 pkt_dev->udp_src_min = value;
983 pkt_dev->cur_udp_src = value;
984 }
985 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
986 return count;
987 }
988 if (!strcmp(name, "udp_dst_min")) {
989 len = num_arg(&user_buffer[i], 10, &value);
990 if (len < 0)
991 return len;
992
993 i += len;
994 if (value != pkt_dev->udp_dst_min) {
995 pkt_dev->udp_dst_min = value;
996 pkt_dev->cur_udp_dst = value;
997 }
998 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
999 return count;
1000 }
1001 if (!strcmp(name, "udp_src_max")) {
1002 len = num_arg(&user_buffer[i], 10, &value);
1003 if (len < 0)
1004 return len;
1005
1006 i += len;
1007 if (value != pkt_dev->udp_src_max) {
1008 pkt_dev->udp_src_max = value;
1009 pkt_dev->cur_udp_src = value;
1010 }
1011 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1012 return count;
1013 }
1014 if (!strcmp(name, "udp_dst_max")) {
1015 len = num_arg(&user_buffer[i], 10, &value);
1016 if (len < 0)
1017 return len;
1018
1019 i += len;
1020 if (value != pkt_dev->udp_dst_max) {
1021 pkt_dev->udp_dst_max = value;
1022 pkt_dev->cur_udp_dst = value;
1023 }
1024 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1025 return count;
1026 }
1027 if (!strcmp(name, "clone_skb")) {
1028 len = num_arg(&user_buffer[i], 10, &value);
1029 if (len < 0)
1030 return len;
1031
1032 i += len;
1033 pkt_dev->clone_skb = value;
1034
1035 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1036 return count;
1037 }
1038 if (!strcmp(name, "count")) {
1039 len = num_arg(&user_buffer[i], 10, &value);
1040 if (len < 0)
1041 return len;
1042
1043 i += len;
1044 pkt_dev->count = value;
1045 sprintf(pg_result, "OK: count=%llu",
1046 (unsigned long long)pkt_dev->count);
1047 return count;
1048 }
1049 if (!strcmp(name, "src_mac_count")) {
1050 len = num_arg(&user_buffer[i], 10, &value);
1051 if (len < 0)
1052 return len;
1053
1054 i += len;
1055 if (pkt_dev->src_mac_count != value) {
1056 pkt_dev->src_mac_count = value;
1057 pkt_dev->cur_src_mac_offset = 0;
1058 }
1059 sprintf(pg_result, "OK: src_mac_count=%d",
1060 pkt_dev->src_mac_count);
1061 return count;
1062 }
1063 if (!strcmp(name, "dst_mac_count")) {
1064 len = num_arg(&user_buffer[i], 10, &value);
1065 if (len < 0)
1066 return len;
1067
1068 i += len;
1069 if (pkt_dev->dst_mac_count != value) {
1070 pkt_dev->dst_mac_count = value;
1071 pkt_dev->cur_dst_mac_offset = 0;
1072 }
1073 sprintf(pg_result, "OK: dst_mac_count=%d",
1074 pkt_dev->dst_mac_count);
1075 return count;
1076 }
1077 if (!strcmp(name, "flag")) {
1078 char f[32];
1079 memset(f, 0, 32);
1080 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1081 if (len < 0)
1082 return len;
1083
1084 if (copy_from_user(f, &user_buffer[i], len))
1085 return -EFAULT;
1086 i += len;
1087 if (strcmp(f, "IPSRC_RND") == 0)
1088 pkt_dev->flags |= F_IPSRC_RND;
1089
1090 else if (strcmp(f, "!IPSRC_RND") == 0)
1091 pkt_dev->flags &= ~F_IPSRC_RND;
1092
1093 else if (strcmp(f, "TXSIZE_RND") == 0)
1094 pkt_dev->flags |= F_TXSIZE_RND;
1095
1096 else if (strcmp(f, "!TXSIZE_RND") == 0)
1097 pkt_dev->flags &= ~F_TXSIZE_RND;
1098
1099 else if (strcmp(f, "IPDST_RND") == 0)
1100 pkt_dev->flags |= F_IPDST_RND;
1101
1102 else if (strcmp(f, "!IPDST_RND") == 0)
1103 pkt_dev->flags &= ~F_IPDST_RND;
1104
1105 else if (strcmp(f, "UDPSRC_RND") == 0)
1106 pkt_dev->flags |= F_UDPSRC_RND;
1107
1108 else if (strcmp(f, "!UDPSRC_RND") == 0)
1109 pkt_dev->flags &= ~F_UDPSRC_RND;
1110
1111 else if (strcmp(f, "UDPDST_RND") == 0)
1112 pkt_dev->flags |= F_UDPDST_RND;
1113
1114 else if (strcmp(f, "!UDPDST_RND") == 0)
1115 pkt_dev->flags &= ~F_UDPDST_RND;
1116
1117 else if (strcmp(f, "MACSRC_RND") == 0)
1118 pkt_dev->flags |= F_MACSRC_RND;
1119
1120 else if (strcmp(f, "!MACSRC_RND") == 0)
1121 pkt_dev->flags &= ~F_MACSRC_RND;
1122
1123 else if (strcmp(f, "MACDST_RND") == 0)
1124 pkt_dev->flags |= F_MACDST_RND;
1125
1126 else if (strcmp(f, "!MACDST_RND") == 0)
1127 pkt_dev->flags &= ~F_MACDST_RND;
1128
1129 else if (strcmp(f, "MPLS_RND") == 0)
1130 pkt_dev->flags |= F_MPLS_RND;
1131
1132 else if (strcmp(f, "!MPLS_RND") == 0)
1133 pkt_dev->flags &= ~F_MPLS_RND;
1134
1135 else if (strcmp(f, "VID_RND") == 0)
1136 pkt_dev->flags |= F_VID_RND;
1137
1138 else if (strcmp(f, "!VID_RND") == 0)
1139 pkt_dev->flags &= ~F_VID_RND;
1140
1141 else if (strcmp(f, "SVID_RND") == 0)
1142 pkt_dev->flags |= F_SVID_RND;
1143
1144 else if (strcmp(f, "!SVID_RND") == 0)
1145 pkt_dev->flags &= ~F_SVID_RND;
1146
1147 else if (strcmp(f, "FLOW_SEQ") == 0)
1148 pkt_dev->flags |= F_FLOW_SEQ;
1149
1150 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1151 pkt_dev->flags |= F_QUEUE_MAP_RND;
1152
1153 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1154 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1155
1156 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1157 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1158
1159 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1160 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1161 #ifdef CONFIG_XFRM
1162 else if (strcmp(f, "IPSEC") == 0)
1163 pkt_dev->flags |= F_IPSEC_ON;
1164 #endif
1165
1166 else if (strcmp(f, "!IPV6") == 0)
1167 pkt_dev->flags &= ~F_IPV6;
1168
1169 else {
1170 sprintf(pg_result,
1171 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1172 f,
1173 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1174 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC\n");
1175 return count;
1176 }
1177 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1178 return count;
1179 }
1180 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1181 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1182 if (len < 0)
1183 return len;
1184
1185 if (copy_from_user(buf, &user_buffer[i], len))
1186 return -EFAULT;
1187 buf[len] = 0;
1188 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1189 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1190 strncpy(pkt_dev->dst_min, buf, len);
1191 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1192 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1193 }
1194 if (debug)
1195 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1196 pkt_dev->dst_min);
1197 i += len;
1198 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1199 return count;
1200 }
1201 if (!strcmp(name, "dst_max")) {
1202 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1203 if (len < 0)
1204 return len;
1205
1206
1207 if (copy_from_user(buf, &user_buffer[i], len))
1208 return -EFAULT;
1209
1210 buf[len] = 0;
1211 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1212 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1213 strncpy(pkt_dev->dst_max, buf, len);
1214 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1215 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1216 }
1217 if (debug)
1218 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1219 pkt_dev->dst_max);
1220 i += len;
1221 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1222 return count;
1223 }
1224 if (!strcmp(name, "dst6")) {
1225 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1226 if (len < 0)
1227 return len;
1228
1229 pkt_dev->flags |= F_IPV6;
1230
1231 if (copy_from_user(buf, &user_buffer[i], len))
1232 return -EFAULT;
1233 buf[len] = 0;
1234
1235 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1236 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1237
1238 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1239
1240 if (debug)
1241 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1242
1243 i += len;
1244 sprintf(pg_result, "OK: dst6=%s", buf);
1245 return count;
1246 }
1247 if (!strcmp(name, "dst6_min")) {
1248 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1249 if (len < 0)
1250 return len;
1251
1252 pkt_dev->flags |= F_IPV6;
1253
1254 if (copy_from_user(buf, &user_buffer[i], len))
1255 return -EFAULT;
1256 buf[len] = 0;
1257
1258 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1259 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1260
1261 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1262 &pkt_dev->min_in6_daddr);
1263 if (debug)
1264 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1265
1266 i += len;
1267 sprintf(pg_result, "OK: dst6_min=%s", buf);
1268 return count;
1269 }
1270 if (!strcmp(name, "dst6_max")) {
1271 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1272 if (len < 0)
1273 return len;
1274
1275 pkt_dev->flags |= F_IPV6;
1276
1277 if (copy_from_user(buf, &user_buffer[i], len))
1278 return -EFAULT;
1279 buf[len] = 0;
1280
1281 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1282 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1283
1284 if (debug)
1285 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1286
1287 i += len;
1288 sprintf(pg_result, "OK: dst6_max=%s", buf);
1289 return count;
1290 }
1291 if (!strcmp(name, "src6")) {
1292 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1293 if (len < 0)
1294 return len;
1295
1296 pkt_dev->flags |= F_IPV6;
1297
1298 if (copy_from_user(buf, &user_buffer[i], len))
1299 return -EFAULT;
1300 buf[len] = 0;
1301
1302 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1303 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1304
1305 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1306
1307 if (debug)
1308 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1309
1310 i += len;
1311 sprintf(pg_result, "OK: src6=%s", buf);
1312 return count;
1313 }
1314 if (!strcmp(name, "src_min")) {
1315 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1316 if (len < 0)
1317 return len;
1318
1319 if (copy_from_user(buf, &user_buffer[i], len))
1320 return -EFAULT;
1321 buf[len] = 0;
1322 if (strcmp(buf, pkt_dev->src_min) != 0) {
1323 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1324 strncpy(pkt_dev->src_min, buf, len);
1325 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1326 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1327 }
1328 if (debug)
1329 printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1330 pkt_dev->src_min);
1331 i += len;
1332 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1333 return count;
1334 }
1335 if (!strcmp(name, "src_max")) {
1336 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1337 if (len < 0)
1338 return len;
1339
1340 if (copy_from_user(buf, &user_buffer[i], len))
1341 return -EFAULT;
1342 buf[len] = 0;
1343 if (strcmp(buf, pkt_dev->src_max) != 0) {
1344 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1345 strncpy(pkt_dev->src_max, buf, len);
1346 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1347 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1348 }
1349 if (debug)
1350 printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1351 pkt_dev->src_max);
1352 i += len;
1353 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1354 return count;
1355 }
1356 if (!strcmp(name, "dst_mac")) {
1357 char *v = valstr;
1358 unsigned char old_dmac[ETH_ALEN];
1359 unsigned char *m = pkt_dev->dst_mac;
1360 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1361
1362 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1363 if (len < 0)
1364 return len;
1365
1366 memset(valstr, 0, sizeof(valstr));
1367 if (copy_from_user(valstr, &user_buffer[i], len))
1368 return -EFAULT;
1369 i += len;
1370
1371 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1372 if (*v >= '0' && *v <= '9') {
1373 *m *= 16;
1374 *m += *v - '0';
1375 }
1376 if (*v >= 'A' && *v <= 'F') {
1377 *m *= 16;
1378 *m += *v - 'A' + 10;
1379 }
1380 if (*v >= 'a' && *v <= 'f') {
1381 *m *= 16;
1382 *m += *v - 'a' + 10;
1383 }
1384 if (*v == ':') {
1385 m++;
1386 *m = 0;
1387 }
1388 }
1389
1390 /* Set up Dest MAC */
1391 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1392 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1393
1394 sprintf(pg_result, "OK: dstmac");
1395 return count;
1396 }
1397 if (!strcmp(name, "src_mac")) {
1398 char *v = valstr;
1399 unsigned char old_smac[ETH_ALEN];
1400 unsigned char *m = pkt_dev->src_mac;
1401
1402 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN);
1403
1404 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1405 if (len < 0)
1406 return len;
1407
1408 memset(valstr, 0, sizeof(valstr));
1409 if (copy_from_user(valstr, &user_buffer[i], len))
1410 return -EFAULT;
1411 i += len;
1412
1413 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1414 if (*v >= '0' && *v <= '9') {
1415 *m *= 16;
1416 *m += *v - '0';
1417 }
1418 if (*v >= 'A' && *v <= 'F') {
1419 *m *= 16;
1420 *m += *v - 'A' + 10;
1421 }
1422 if (*v >= 'a' && *v <= 'f') {
1423 *m *= 16;
1424 *m += *v - 'a' + 10;
1425 }
1426 if (*v == ':') {
1427 m++;
1428 *m = 0;
1429 }
1430 }
1431
1432 /* Set up Src MAC */
1433 if (compare_ether_addr(old_smac, pkt_dev->src_mac))
1434 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN);
1435
1436 sprintf(pg_result, "OK: srcmac");
1437 return count;
1438 }
1439
1440 if (!strcmp(name, "clear_counters")) {
1441 pktgen_clear_counters(pkt_dev);
1442 sprintf(pg_result, "OK: Clearing counters.\n");
1443 return count;
1444 }
1445
1446 if (!strcmp(name, "flows")) {
1447 len = num_arg(&user_buffer[i], 10, &value);
1448 if (len < 0)
1449 return len;
1450
1451 i += len;
1452 if (value > MAX_CFLOWS)
1453 value = MAX_CFLOWS;
1454
1455 pkt_dev->cflows = value;
1456 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1457 return count;
1458 }
1459
1460 if (!strcmp(name, "flowlen")) {
1461 len = num_arg(&user_buffer[i], 10, &value);
1462 if (len < 0)
1463 return len;
1464
1465 i += len;
1466 pkt_dev->lflow = value;
1467 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1468 return count;
1469 }
1470
1471 if (!strcmp(name, "queue_map_min")) {
1472 len = num_arg(&user_buffer[i], 5, &value);
1473 if (len < 0)
1474 return len;
1475
1476 i += len;
1477 pkt_dev->queue_map_min = value;
1478 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1479 return count;
1480 }
1481
1482 if (!strcmp(name, "queue_map_max")) {
1483 len = num_arg(&user_buffer[i], 5, &value);
1484 if (len < 0)
1485 return len;
1486
1487 i += len;
1488 pkt_dev->queue_map_max = value;
1489 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1490 return count;
1491 }
1492
1493 if (!strcmp(name, "mpls")) {
1494 unsigned n, cnt;
1495
1496 len = get_labels(&user_buffer[i], pkt_dev);
1497 if (len < 0)
1498 return len;
1499 i += len;
1500 cnt = sprintf(pg_result, "OK: mpls=");
1501 for (n = 0; n < pkt_dev->nr_labels; n++)
1502 cnt += sprintf(pg_result + cnt,
1503 "%08x%s", ntohl(pkt_dev->labels[n]),
1504 n == pkt_dev->nr_labels-1 ? "" : ",");
1505
1506 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1507 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1508 pkt_dev->svlan_id = 0xffff;
1509
1510 if (debug)
1511 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1512 }
1513 return count;
1514 }
1515
1516 if (!strcmp(name, "vlan_id")) {
1517 len = num_arg(&user_buffer[i], 4, &value);
1518 if (len < 0)
1519 return len;
1520
1521 i += len;
1522 if (value <= 4095) {
1523 pkt_dev->vlan_id = value; /* turn on VLAN */
1524
1525 if (debug)
1526 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1527
1528 if (debug && pkt_dev->nr_labels)
1529 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1530
1531 pkt_dev->nr_labels = 0; /* turn off MPLS */
1532 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1533 } else {
1534 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1535 pkt_dev->svlan_id = 0xffff;
1536
1537 if (debug)
1538 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1539 }
1540 return count;
1541 }
1542
1543 if (!strcmp(name, "vlan_p")) {
1544 len = num_arg(&user_buffer[i], 1, &value);
1545 if (len < 0)
1546 return len;
1547
1548 i += len;
1549 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1550 pkt_dev->vlan_p = value;
1551 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1552 } else {
1553 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1554 }
1555 return count;
1556 }
1557
1558 if (!strcmp(name, "vlan_cfi")) {
1559 len = num_arg(&user_buffer[i], 1, &value);
1560 if (len < 0)
1561 return len;
1562
1563 i += len;
1564 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1565 pkt_dev->vlan_cfi = value;
1566 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1567 } else {
1568 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1569 }
1570 return count;
1571 }
1572
1573 if (!strcmp(name, "svlan_id")) {
1574 len = num_arg(&user_buffer[i], 4, &value);
1575 if (len < 0)
1576 return len;
1577
1578 i += len;
1579 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1580 pkt_dev->svlan_id = value; /* turn on SVLAN */
1581
1582 if (debug)
1583 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1584
1585 if (debug && pkt_dev->nr_labels)
1586 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1587
1588 pkt_dev->nr_labels = 0; /* turn off MPLS */
1589 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1590 } else {
1591 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1592 pkt_dev->svlan_id = 0xffff;
1593
1594 if (debug)
1595 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1596 }
1597 return count;
1598 }
1599
1600 if (!strcmp(name, "svlan_p")) {
1601 len = num_arg(&user_buffer[i], 1, &value);
1602 if (len < 0)
1603 return len;
1604
1605 i += len;
1606 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1607 pkt_dev->svlan_p = value;
1608 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1609 } else {
1610 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1611 }
1612 return count;
1613 }
1614
1615 if (!strcmp(name, "svlan_cfi")) {
1616 len = num_arg(&user_buffer[i], 1, &value);
1617 if (len < 0)
1618 return len;
1619
1620 i += len;
1621 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1622 pkt_dev->svlan_cfi = value;
1623 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1624 } else {
1625 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1626 }
1627 return count;
1628 }
1629
1630 if (!strcmp(name, "tos")) {
1631 __u32 tmp_value = 0;
1632 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1633 if (len < 0)
1634 return len;
1635
1636 i += len;
1637 if (len == 2) {
1638 pkt_dev->tos = tmp_value;
1639 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1640 } else {
1641 sprintf(pg_result, "ERROR: tos must be 00-ff");
1642 }
1643 return count;
1644 }
1645
1646 if (!strcmp(name, "traffic_class")) {
1647 __u32 tmp_value = 0;
1648 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1649 if (len < 0)
1650 return len;
1651
1652 i += len;
1653 if (len == 2) {
1654 pkt_dev->traffic_class = tmp_value;
1655 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1656 } else {
1657 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1658 }
1659 return count;
1660 }
1661
1662 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1663 return -EINVAL;
1664 }
1665
1666 static int pktgen_if_open(struct inode *inode, struct file *file)
1667 {
1668 return single_open(file, pktgen_if_show, PDE(inode)->data);
1669 }
1670
1671 static const struct file_operations pktgen_if_fops = {
1672 .owner = THIS_MODULE,
1673 .open = pktgen_if_open,
1674 .read = seq_read,
1675 .llseek = seq_lseek,
1676 .write = pktgen_if_write,
1677 .release = single_release,
1678 };
1679
1680 static int pktgen_thread_show(struct seq_file *seq, void *v)
1681 {
1682 struct pktgen_thread *t = seq->private;
1683 const struct pktgen_dev *pkt_dev;
1684
1685 BUG_ON(!t);
1686
1687 seq_printf(seq, "Running: ");
1688
1689 if_lock(t);
1690 list_for_each_entry(pkt_dev, &t->if_list, list)
1691 if (pkt_dev->running)
1692 seq_printf(seq, "%s ", pkt_dev->odevname);
1693
1694 seq_printf(seq, "\nStopped: ");
1695
1696 list_for_each_entry(pkt_dev, &t->if_list, list)
1697 if (!pkt_dev->running)
1698 seq_printf(seq, "%s ", pkt_dev->odevname);
1699
1700 if (t->result[0])
1701 seq_printf(seq, "\nResult: %s\n", t->result);
1702 else
1703 seq_printf(seq, "\nResult: NA\n");
1704
1705 if_unlock(t);
1706
1707 return 0;
1708 }
1709
1710 static ssize_t pktgen_thread_write(struct file *file,
1711 const char __user * user_buffer,
1712 size_t count, loff_t * offset)
1713 {
1714 struct seq_file *seq = (struct seq_file *)file->private_data;
1715 struct pktgen_thread *t = seq->private;
1716 int i = 0, max, len, ret;
1717 char name[40];
1718 char *pg_result;
1719
1720 if (count < 1) {
1721 // sprintf(pg_result, "Wrong command format");
1722 return -EINVAL;
1723 }
1724
1725 max = count - i;
1726 len = count_trail_chars(&user_buffer[i], max);
1727 if (len < 0)
1728 return len;
1729
1730 i += len;
1731
1732 /* Read variable name */
1733
1734 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1735 if (len < 0)
1736 return len;
1737
1738 memset(name, 0, sizeof(name));
1739 if (copy_from_user(name, &user_buffer[i], len))
1740 return -EFAULT;
1741 i += len;
1742
1743 max = count - i;
1744 len = count_trail_chars(&user_buffer[i], max);
1745 if (len < 0)
1746 return len;
1747
1748 i += len;
1749
1750 if (debug)
1751 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1752 name, (unsigned long)count);
1753
1754 if (!t) {
1755 printk(KERN_ERR "pktgen: ERROR: No thread\n");
1756 ret = -EINVAL;
1757 goto out;
1758 }
1759
1760 pg_result = &(t->result[0]);
1761
1762 if (!strcmp(name, "add_device")) {
1763 char f[32];
1764 memset(f, 0, 32);
1765 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1766 if (len < 0) {
1767 ret = len;
1768 goto out;
1769 }
1770 if (copy_from_user(f, &user_buffer[i], len))
1771 return -EFAULT;
1772 i += len;
1773 mutex_lock(&pktgen_thread_lock);
1774 pktgen_add_device(t, f);
1775 mutex_unlock(&pktgen_thread_lock);
1776 ret = count;
1777 sprintf(pg_result, "OK: add_device=%s", f);
1778 goto out;
1779 }
1780
1781 if (!strcmp(name, "rem_device_all")) {
1782 mutex_lock(&pktgen_thread_lock);
1783 t->control |= T_REMDEVALL;
1784 mutex_unlock(&pktgen_thread_lock);
1785 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1786 ret = count;
1787 sprintf(pg_result, "OK: rem_device_all");
1788 goto out;
1789 }
1790
1791 if (!strcmp(name, "max_before_softirq")) {
1792 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1793 ret = count;
1794 goto out;
1795 }
1796
1797 ret = -EINVAL;
1798 out:
1799 return ret;
1800 }
1801
1802 static int pktgen_thread_open(struct inode *inode, struct file *file)
1803 {
1804 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1805 }
1806
1807 static const struct file_operations pktgen_thread_fops = {
1808 .owner = THIS_MODULE,
1809 .open = pktgen_thread_open,
1810 .read = seq_read,
1811 .llseek = seq_lseek,
1812 .write = pktgen_thread_write,
1813 .release = single_release,
1814 };
1815
1816 /* Think find or remove for NN */
1817 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1818 {
1819 struct pktgen_thread *t;
1820 struct pktgen_dev *pkt_dev = NULL;
1821 bool exact = (remove == FIND);
1822
1823 list_for_each_entry(t, &pktgen_threads, th_list) {
1824 pkt_dev = pktgen_find_dev(t, ifname, exact);
1825 if (pkt_dev) {
1826 if (remove) {
1827 if_lock(t);
1828 pkt_dev->removal_mark = 1;
1829 t->control |= T_REMDEV;
1830 if_unlock(t);
1831 }
1832 break;
1833 }
1834 }
1835 return pkt_dev;
1836 }
1837
1838 /*
1839 * mark a device for removal
1840 */
1841 static void pktgen_mark_device(const char *ifname)
1842 {
1843 struct pktgen_dev *pkt_dev = NULL;
1844 const int max_tries = 10, msec_per_try = 125;
1845 int i = 0;
1846
1847 mutex_lock(&pktgen_thread_lock);
1848 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname);
1849
1850 while (1) {
1851
1852 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1853 if (pkt_dev == NULL)
1854 break; /* success */
1855
1856 mutex_unlock(&pktgen_thread_lock);
1857 pr_debug("pktgen: pktgen_mark_device waiting for %s "
1858 "to disappear....\n", ifname);
1859 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1860 mutex_lock(&pktgen_thread_lock);
1861
1862 if (++i >= max_tries) {
1863 printk(KERN_ERR "pktgen_mark_device: timed out after "
1864 "waiting %d msec for device %s to be removed\n",
1865 msec_per_try * i, ifname);
1866 break;
1867 }
1868
1869 }
1870
1871 mutex_unlock(&pktgen_thread_lock);
1872 }
1873
1874 static void pktgen_change_name(struct net_device *dev)
1875 {
1876 struct pktgen_thread *t;
1877
1878 list_for_each_entry(t, &pktgen_threads, th_list) {
1879 struct pktgen_dev *pkt_dev;
1880
1881 list_for_each_entry(pkt_dev, &t->if_list, list) {
1882 if (pkt_dev->odev != dev)
1883 continue;
1884
1885 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1886
1887 pkt_dev->entry = proc_create_data(dev->name, 0600,
1888 pg_proc_dir,
1889 &pktgen_if_fops,
1890 pkt_dev);
1891 if (!pkt_dev->entry)
1892 printk(KERN_ERR "pktgen: can't move proc "
1893 " entry for '%s'\n", dev->name);
1894 break;
1895 }
1896 }
1897 }
1898
1899 static int pktgen_device_event(struct notifier_block *unused,
1900 unsigned long event, void *ptr)
1901 {
1902 struct net_device *dev = ptr;
1903
1904 if (!net_eq(dev_net(dev), &init_net))
1905 return NOTIFY_DONE;
1906
1907 /* It is OK that we do not hold the group lock right now,
1908 * as we run under the RTNL lock.
1909 */
1910
1911 switch (event) {
1912 case NETDEV_CHANGENAME:
1913 pktgen_change_name(dev);
1914 break;
1915
1916 case NETDEV_UNREGISTER:
1917 pktgen_mark_device(dev->name);
1918 break;
1919 }
1920
1921 return NOTIFY_DONE;
1922 }
1923
1924 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev,
1925 const char *ifname)
1926 {
1927 char b[IFNAMSIZ+5];
1928 int i = 0;
1929
1930 for (i = 0; ifname[i] != '@'; i++) {
1931 if (i == IFNAMSIZ)
1932 break;
1933
1934 b[i] = ifname[i];
1935 }
1936 b[i] = 0;
1937
1938 return dev_get_by_name(&init_net, b);
1939 }
1940
1941
1942 /* Associate pktgen_dev with a device. */
1943
1944 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1945 {
1946 struct net_device *odev;
1947 int err;
1948
1949 /* Clean old setups */
1950 if (pkt_dev->odev) {
1951 dev_put(pkt_dev->odev);
1952 pkt_dev->odev = NULL;
1953 }
1954
1955 odev = pktgen_dev_get_by_name(pkt_dev, ifname);
1956 if (!odev) {
1957 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname);
1958 return -ENODEV;
1959 }
1960
1961 if (odev->type != ARPHRD_ETHER) {
1962 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname);
1963 err = -EINVAL;
1964 } else if (!netif_running(odev)) {
1965 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname);
1966 err = -ENETDOWN;
1967 } else {
1968 pkt_dev->odev = odev;
1969 return 0;
1970 }
1971
1972 dev_put(odev);
1973 return err;
1974 }
1975
1976 /* Read pkt_dev from the interface and set up internal pktgen_dev
1977 * structure to have the right information to create/send packets
1978 */
1979 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
1980 {
1981 int ntxq;
1982
1983 if (!pkt_dev->odev) {
1984 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in "
1985 "setup_inject.\n");
1986 sprintf(pkt_dev->result,
1987 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1988 return;
1989 }
1990
1991 /* make sure that we don't pick a non-existing transmit queue */
1992 ntxq = pkt_dev->odev->real_num_tx_queues;
1993
1994 if (ntxq <= pkt_dev->queue_map_min) {
1995 printk(KERN_WARNING "pktgen: WARNING: Requested "
1996 "queue_map_min (zero-based) (%d) exceeds valid range "
1997 "[0 - %d] for (%d) queues on %s, resetting\n",
1998 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
1999 pkt_dev->odevname);
2000 pkt_dev->queue_map_min = ntxq - 1;
2001 }
2002 if (pkt_dev->queue_map_max >= ntxq) {
2003 printk(KERN_WARNING "pktgen: WARNING: Requested "
2004 "queue_map_max (zero-based) (%d) exceeds valid range "
2005 "[0 - %d] for (%d) queues on %s, resetting\n",
2006 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2007 pkt_dev->odevname);
2008 pkt_dev->queue_map_max = ntxq - 1;
2009 }
2010
2011 /* Default to the interface's mac if not explicitly set. */
2012
2013 if (is_zero_ether_addr(pkt_dev->src_mac))
2014 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2015
2016 /* Set up Dest MAC */
2017 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2018
2019 /* Set up pkt size */
2020 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2021
2022 if (pkt_dev->flags & F_IPV6) {
2023 /*
2024 * Skip this automatic address setting until locks or functions
2025 * gets exported
2026 */
2027
2028 #ifdef NOTNOW
2029 int i, set = 0, err = 1;
2030 struct inet6_dev *idev;
2031
2032 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2033 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2034 set = 1;
2035 break;
2036 }
2037
2038 if (!set) {
2039
2040 /*
2041 * Use linklevel address if unconfigured.
2042 *
2043 * use ipv6_get_lladdr if/when it's get exported
2044 */
2045
2046 rcu_read_lock();
2047 idev = __in6_dev_get(pkt_dev->odev);
2048 if (idev) {
2049 struct inet6_ifaddr *ifp;
2050
2051 read_lock_bh(&idev->lock);
2052 for (ifp = idev->addr_list; ifp;
2053 ifp = ifp->if_next) {
2054 if (ifp->scope == IFA_LINK &&
2055 !(ifp->flags & IFA_F_TENTATIVE)) {
2056 ipv6_addr_copy(&pkt_dev->
2057 cur_in6_saddr,
2058 &ifp->addr);
2059 err = 0;
2060 break;
2061 }
2062 }
2063 read_unlock_bh(&idev->lock);
2064 }
2065 rcu_read_unlock();
2066 if (err)
2067 printk(KERN_ERR "pktgen: ERROR: IPv6 link "
2068 "address not availble.\n");
2069 }
2070 #endif
2071 } else {
2072 pkt_dev->saddr_min = 0;
2073 pkt_dev->saddr_max = 0;
2074 if (strlen(pkt_dev->src_min) == 0) {
2075
2076 struct in_device *in_dev;
2077
2078 rcu_read_lock();
2079 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2080 if (in_dev) {
2081 if (in_dev->ifa_list) {
2082 pkt_dev->saddr_min =
2083 in_dev->ifa_list->ifa_address;
2084 pkt_dev->saddr_max = pkt_dev->saddr_min;
2085 }
2086 }
2087 rcu_read_unlock();
2088 } else {
2089 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2090 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2091 }
2092
2093 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2094 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2095 }
2096 /* Initialize current values. */
2097 pkt_dev->cur_dst_mac_offset = 0;
2098 pkt_dev->cur_src_mac_offset = 0;
2099 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2100 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2101 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2102 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2103 pkt_dev->nflows = 0;
2104 }
2105
2106
2107 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2108 {
2109 ktime_t start_time, end_time;
2110 s64 remaining;
2111 struct hrtimer_sleeper t;
2112
2113 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2114 hrtimer_set_expires(&t.timer, spin_until);
2115
2116 remaining = ktime_to_us(hrtimer_expires_remaining(&t.timer));
2117 if (remaining <= 0) {
2118 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2119 return;
2120 }
2121
2122 start_time = ktime_now();
2123 if (remaining < 100)
2124 udelay(remaining); /* really small just spin */
2125 else {
2126 /* see do_nanosleep */
2127 hrtimer_init_sleeper(&t, current);
2128 do {
2129 set_current_state(TASK_INTERRUPTIBLE);
2130 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2131 if (!hrtimer_active(&t.timer))
2132 t.task = NULL;
2133
2134 if (likely(t.task))
2135 schedule();
2136
2137 hrtimer_cancel(&t.timer);
2138 } while (t.task && pkt_dev->running && !signal_pending(current));
2139 __set_current_state(TASK_RUNNING);
2140 }
2141 end_time = ktime_now();
2142
2143 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2144 pkt_dev->next_tx = ktime_add_ns(end_time, pkt_dev->delay);
2145 }
2146
2147 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2148 {
2149 pkt_dev->pkt_overhead = 0;
2150 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2151 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2152 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2153 }
2154
2155 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2156 {
2157 return !!(pkt_dev->flows[flow].flags & F_INIT);
2158 }
2159
2160 static inline int f_pick(struct pktgen_dev *pkt_dev)
2161 {
2162 int flow = pkt_dev->curfl;
2163
2164 if (pkt_dev->flags & F_FLOW_SEQ) {
2165 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2166 /* reset time */
2167 pkt_dev->flows[flow].count = 0;
2168 pkt_dev->flows[flow].flags = 0;
2169 pkt_dev->curfl += 1;
2170 if (pkt_dev->curfl >= pkt_dev->cflows)
2171 pkt_dev->curfl = 0; /*reset */
2172 }
2173 } else {
2174 flow = random32() % pkt_dev->cflows;
2175 pkt_dev->curfl = flow;
2176
2177 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2178 pkt_dev->flows[flow].count = 0;
2179 pkt_dev->flows[flow].flags = 0;
2180 }
2181 }
2182
2183 return pkt_dev->curfl;
2184 }
2185
2186
2187 #ifdef CONFIG_XFRM
2188 /* If there was already an IPSEC SA, we keep it as is, else
2189 * we go look for it ...
2190 */
2191 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2192 {
2193 struct xfrm_state *x = pkt_dev->flows[flow].x;
2194 if (!x) {
2195 /*slow path: we dont already have xfrm_state*/
2196 x = xfrm_stateonly_find(&init_net,
2197 (xfrm_address_t *)&pkt_dev->cur_daddr,
2198 (xfrm_address_t *)&pkt_dev->cur_saddr,
2199 AF_INET,
2200 pkt_dev->ipsmode,
2201 pkt_dev->ipsproto, 0);
2202 if (x) {
2203 pkt_dev->flows[flow].x = x;
2204 set_pkt_overhead(pkt_dev);
2205 pkt_dev->pkt_overhead += x->props.header_len;
2206 }
2207
2208 }
2209 }
2210 #endif
2211 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2212 {
2213
2214 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2215 pkt_dev->cur_queue_map = smp_processor_id();
2216
2217 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2218 __u16 t;
2219 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2220 t = random32() %
2221 (pkt_dev->queue_map_max -
2222 pkt_dev->queue_map_min + 1)
2223 + pkt_dev->queue_map_min;
2224 } else {
2225 t = pkt_dev->cur_queue_map + 1;
2226 if (t > pkt_dev->queue_map_max)
2227 t = pkt_dev->queue_map_min;
2228 }
2229 pkt_dev->cur_queue_map = t;
2230 }
2231 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2232 }
2233
2234 /* Increment/randomize headers according to flags and current values
2235 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2236 */
2237 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2238 {
2239 __u32 imn;
2240 __u32 imx;
2241 int flow = 0;
2242
2243 if (pkt_dev->cflows)
2244 flow = f_pick(pkt_dev);
2245
2246 /* Deal with source MAC */
2247 if (pkt_dev->src_mac_count > 1) {
2248 __u32 mc;
2249 __u32 tmp;
2250
2251 if (pkt_dev->flags & F_MACSRC_RND)
2252 mc = random32() % pkt_dev->src_mac_count;
2253 else {
2254 mc = pkt_dev->cur_src_mac_offset++;
2255 if (pkt_dev->cur_src_mac_offset >=
2256 pkt_dev->src_mac_count)
2257 pkt_dev->cur_src_mac_offset = 0;
2258 }
2259
2260 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2261 pkt_dev->hh[11] = tmp;
2262 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2263 pkt_dev->hh[10] = tmp;
2264 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2265 pkt_dev->hh[9] = tmp;
2266 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2267 pkt_dev->hh[8] = tmp;
2268 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2269 pkt_dev->hh[7] = tmp;
2270 }
2271
2272 /* Deal with Destination MAC */
2273 if (pkt_dev->dst_mac_count > 1) {
2274 __u32 mc;
2275 __u32 tmp;
2276
2277 if (pkt_dev->flags & F_MACDST_RND)
2278 mc = random32() % pkt_dev->dst_mac_count;
2279
2280 else {
2281 mc = pkt_dev->cur_dst_mac_offset++;
2282 if (pkt_dev->cur_dst_mac_offset >=
2283 pkt_dev->dst_mac_count) {
2284 pkt_dev->cur_dst_mac_offset = 0;
2285 }
2286 }
2287
2288 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2289 pkt_dev->hh[5] = tmp;
2290 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2291 pkt_dev->hh[4] = tmp;
2292 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2293 pkt_dev->hh[3] = tmp;
2294 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2295 pkt_dev->hh[2] = tmp;
2296 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2297 pkt_dev->hh[1] = tmp;
2298 }
2299
2300 if (pkt_dev->flags & F_MPLS_RND) {
2301 unsigned i;
2302 for (i = 0; i < pkt_dev->nr_labels; i++)
2303 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2304 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2305 ((__force __be32)random32() &
2306 htonl(0x000fffff));
2307 }
2308
2309 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2310 pkt_dev->vlan_id = random32() & (4096-1);
2311 }
2312
2313 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2314 pkt_dev->svlan_id = random32() & (4096 - 1);
2315 }
2316
2317 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2318 if (pkt_dev->flags & F_UDPSRC_RND)
2319 pkt_dev->cur_udp_src = random32() %
2320 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2321 + pkt_dev->udp_src_min;
2322
2323 else {
2324 pkt_dev->cur_udp_src++;
2325 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2326 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2327 }
2328 }
2329
2330 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2331 if (pkt_dev->flags & F_UDPDST_RND) {
2332 pkt_dev->cur_udp_dst = random32() %
2333 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2334 + pkt_dev->udp_dst_min;
2335 } else {
2336 pkt_dev->cur_udp_dst++;
2337 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2338 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2339 }
2340 }
2341
2342 if (!(pkt_dev->flags & F_IPV6)) {
2343
2344 imn = ntohl(pkt_dev->saddr_min);
2345 imx = ntohl(pkt_dev->saddr_max);
2346 if (imn < imx) {
2347 __u32 t;
2348 if (pkt_dev->flags & F_IPSRC_RND)
2349 t = random32() % (imx - imn) + imn;
2350 else {
2351 t = ntohl(pkt_dev->cur_saddr);
2352 t++;
2353 if (t > imx)
2354 t = imn;
2355
2356 }
2357 pkt_dev->cur_saddr = htonl(t);
2358 }
2359
2360 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2361 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2362 } else {
2363 imn = ntohl(pkt_dev->daddr_min);
2364 imx = ntohl(pkt_dev->daddr_max);
2365 if (imn < imx) {
2366 __u32 t;
2367 __be32 s;
2368 if (pkt_dev->flags & F_IPDST_RND) {
2369
2370 t = random32() % (imx - imn) + imn;
2371 s = htonl(t);
2372
2373 while (ipv4_is_loopback(s) ||
2374 ipv4_is_multicast(s) ||
2375 ipv4_is_lbcast(s) ||
2376 ipv4_is_zeronet(s) ||
2377 ipv4_is_local_multicast(s)) {
2378 t = random32() % (imx - imn) + imn;
2379 s = htonl(t);
2380 }
2381 pkt_dev->cur_daddr = s;
2382 } else {
2383 t = ntohl(pkt_dev->cur_daddr);
2384 t++;
2385 if (t > imx) {
2386 t = imn;
2387 }
2388 pkt_dev->cur_daddr = htonl(t);
2389 }
2390 }
2391 if (pkt_dev->cflows) {
2392 pkt_dev->flows[flow].flags |= F_INIT;
2393 pkt_dev->flows[flow].cur_daddr =
2394 pkt_dev->cur_daddr;
2395 #ifdef CONFIG_XFRM
2396 if (pkt_dev->flags & F_IPSEC_ON)
2397 get_ipsec_sa(pkt_dev, flow);
2398 #endif
2399 pkt_dev->nflows++;
2400 }
2401 }
2402 } else { /* IPV6 * */
2403
2404 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2405 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2406 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2407 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2408 else {
2409 int i;
2410
2411 /* Only random destinations yet */
2412
2413 for (i = 0; i < 4; i++) {
2414 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2415 (((__force __be32)random32() |
2416 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2417 pkt_dev->max_in6_daddr.s6_addr32[i]);
2418 }
2419 }
2420 }
2421
2422 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2423 __u32 t;
2424 if (pkt_dev->flags & F_TXSIZE_RND) {
2425 t = random32() %
2426 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2427 + pkt_dev->min_pkt_size;
2428 } else {
2429 t = pkt_dev->cur_pkt_size + 1;
2430 if (t > pkt_dev->max_pkt_size)
2431 t = pkt_dev->min_pkt_size;
2432 }
2433 pkt_dev->cur_pkt_size = t;
2434 }
2435
2436 set_cur_queue_map(pkt_dev);
2437
2438 pkt_dev->flows[flow].count++;
2439 }
2440
2441
2442 #ifdef CONFIG_XFRM
2443 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2444 {
2445 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2446 int err = 0;
2447 struct iphdr *iph;
2448
2449 if (!x)
2450 return 0;
2451 /* XXX: we dont support tunnel mode for now until
2452 * we resolve the dst issue */
2453 if (x->props.mode != XFRM_MODE_TRANSPORT)
2454 return 0;
2455
2456 spin_lock(&x->lock);
2457 iph = ip_hdr(skb);
2458
2459 err = x->outer_mode->output(x, skb);
2460 if (err)
2461 goto error;
2462 err = x->type->output(x, skb);
2463 if (err)
2464 goto error;
2465
2466 x->curlft.bytes += skb->len;
2467 x->curlft.packets++;
2468 error:
2469 spin_unlock(&x->lock);
2470 return err;
2471 }
2472
2473 static void free_SAs(struct pktgen_dev *pkt_dev)
2474 {
2475 if (pkt_dev->cflows) {
2476 /* let go of the SAs if we have them */
2477 int i = 0;
2478 for (; i < pkt_dev->cflows; i++) {
2479 struct xfrm_state *x = pkt_dev->flows[i].x;
2480 if (x) {
2481 xfrm_state_put(x);
2482 pkt_dev->flows[i].x = NULL;
2483 }
2484 }
2485 }
2486 }
2487
2488 static int process_ipsec(struct pktgen_dev *pkt_dev,
2489 struct sk_buff *skb, __be16 protocol)
2490 {
2491 if (pkt_dev->flags & F_IPSEC_ON) {
2492 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2493 int nhead = 0;
2494 if (x) {
2495 int ret;
2496 __u8 *eth;
2497 nhead = x->props.header_len - skb_headroom(skb);
2498 if (nhead > 0) {
2499 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2500 if (ret < 0) {
2501 printk(KERN_ERR "Error expanding "
2502 "ipsec packet %d\n", ret);
2503 goto err;
2504 }
2505 }
2506
2507 /* ipsec is not expecting ll header */
2508 skb_pull(skb, ETH_HLEN);
2509 ret = pktgen_output_ipsec(skb, pkt_dev);
2510 if (ret) {
2511 printk(KERN_ERR "Error creating ipsec "
2512 "packet %d\n", ret);
2513 goto err;
2514 }
2515 /* restore ll */
2516 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2517 memcpy(eth, pkt_dev->hh, 12);
2518 *(u16 *) &eth[12] = protocol;
2519 }
2520 }
2521 return 1;
2522 err:
2523 kfree_skb(skb);
2524 return 0;
2525 }
2526 #endif
2527
2528 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2529 {
2530 unsigned i;
2531 for (i = 0; i < pkt_dev->nr_labels; i++)
2532 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2533
2534 mpls--;
2535 *mpls |= MPLS_STACK_BOTTOM;
2536 }
2537
2538 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2539 unsigned int prio)
2540 {
2541 return htons(id | (cfi << 12) | (prio << 13));
2542 }
2543
2544 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2545 struct pktgen_dev *pkt_dev)
2546 {
2547 struct sk_buff *skb = NULL;
2548 __u8 *eth;
2549 struct udphdr *udph;
2550 int datalen, iplen;
2551 struct iphdr *iph;
2552 struct pktgen_hdr *pgh = NULL;
2553 __be16 protocol = htons(ETH_P_IP);
2554 __be32 *mpls;
2555 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2556 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2557 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2558 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2559 u16 queue_map;
2560
2561 if (pkt_dev->nr_labels)
2562 protocol = htons(ETH_P_MPLS_UC);
2563
2564 if (pkt_dev->vlan_id != 0xffff)
2565 protocol = htons(ETH_P_8021Q);
2566
2567 /* Update any of the values, used when we're incrementing various
2568 * fields.
2569 */
2570 queue_map = pkt_dev->cur_queue_map;
2571 mod_cur_headers(pkt_dev);
2572
2573 datalen = (odev->hard_header_len + 16) & ~0xf;
2574 skb = __netdev_alloc_skb(odev,
2575 pkt_dev->cur_pkt_size + 64
2576 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2577 if (!skb) {
2578 sprintf(pkt_dev->result, "No memory");
2579 return NULL;
2580 }
2581
2582 skb_reserve(skb, datalen);
2583
2584 /* Reserve for ethernet and IP header */
2585 eth = (__u8 *) skb_push(skb, 14);
2586 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2587 if (pkt_dev->nr_labels)
2588 mpls_push(mpls, pkt_dev);
2589
2590 if (pkt_dev->vlan_id != 0xffff) {
2591 if (pkt_dev->svlan_id != 0xffff) {
2592 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2593 *svlan_tci = build_tci(pkt_dev->svlan_id,
2594 pkt_dev->svlan_cfi,
2595 pkt_dev->svlan_p);
2596 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2597 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2598 }
2599 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2600 *vlan_tci = build_tci(pkt_dev->vlan_id,
2601 pkt_dev->vlan_cfi,
2602 pkt_dev->vlan_p);
2603 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2604 *vlan_encapsulated_proto = htons(ETH_P_IP);
2605 }
2606
2607 skb->network_header = skb->tail;
2608 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2609 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2610 skb_set_queue_mapping(skb, queue_map);
2611 iph = ip_hdr(skb);
2612 udph = udp_hdr(skb);
2613
2614 memcpy(eth, pkt_dev->hh, 12);
2615 *(__be16 *) & eth[12] = protocol;
2616
2617 /* Eth + IPh + UDPh + mpls */
2618 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2619 pkt_dev->pkt_overhead;
2620 if (datalen < sizeof(struct pktgen_hdr))
2621 datalen = sizeof(struct pktgen_hdr);
2622
2623 udph->source = htons(pkt_dev->cur_udp_src);
2624 udph->dest = htons(pkt_dev->cur_udp_dst);
2625 udph->len = htons(datalen + 8); /* DATA + udphdr */
2626 udph->check = 0; /* No checksum */
2627
2628 iph->ihl = 5;
2629 iph->version = 4;
2630 iph->ttl = 32;
2631 iph->tos = pkt_dev->tos;
2632 iph->protocol = IPPROTO_UDP; /* UDP */
2633 iph->saddr = pkt_dev->cur_saddr;
2634 iph->daddr = pkt_dev->cur_daddr;
2635 iph->id = htons(pkt_dev->ip_id);
2636 pkt_dev->ip_id++;
2637 iph->frag_off = 0;
2638 iplen = 20 + 8 + datalen;
2639 iph->tot_len = htons(iplen);
2640 iph->check = 0;
2641 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2642 skb->protocol = protocol;
2643 skb->mac_header = (skb->network_header - ETH_HLEN -
2644 pkt_dev->pkt_overhead);
2645 skb->dev = odev;
2646 skb->pkt_type = PACKET_HOST;
2647
2648 if (pkt_dev->nfrags <= 0) {
2649 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2650 memset(pgh + 1, 0, datalen - sizeof(struct pktgen_hdr));
2651 } else {
2652 int frags = pkt_dev->nfrags;
2653 int i, len;
2654
2655 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2656
2657 if (frags > MAX_SKB_FRAGS)
2658 frags = MAX_SKB_FRAGS;
2659 if (datalen > frags * PAGE_SIZE) {
2660 len = datalen - frags * PAGE_SIZE;
2661 memset(skb_put(skb, len), 0, len);
2662 datalen = frags * PAGE_SIZE;
2663 }
2664
2665 i = 0;
2666 while (datalen > 0) {
2667 struct page *page = alloc_pages(GFP_KERNEL | __GFP_ZERO, 0);
2668 skb_shinfo(skb)->frags[i].page = page;
2669 skb_shinfo(skb)->frags[i].page_offset = 0;
2670 skb_shinfo(skb)->frags[i].size =
2671 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2672 datalen -= skb_shinfo(skb)->frags[i].size;
2673 skb->len += skb_shinfo(skb)->frags[i].size;
2674 skb->data_len += skb_shinfo(skb)->frags[i].size;
2675 i++;
2676 skb_shinfo(skb)->nr_frags = i;
2677 }
2678
2679 while (i < frags) {
2680 int rem;
2681
2682 if (i == 0)
2683 break;
2684
2685 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2686 if (rem == 0)
2687 break;
2688
2689 skb_shinfo(skb)->frags[i - 1].size -= rem;
2690
2691 skb_shinfo(skb)->frags[i] =
2692 skb_shinfo(skb)->frags[i - 1];
2693 get_page(skb_shinfo(skb)->frags[i].page);
2694 skb_shinfo(skb)->frags[i].page =
2695 skb_shinfo(skb)->frags[i - 1].page;
2696 skb_shinfo(skb)->frags[i].page_offset +=
2697 skb_shinfo(skb)->frags[i - 1].size;
2698 skb_shinfo(skb)->frags[i].size = rem;
2699 i++;
2700 skb_shinfo(skb)->nr_frags = i;
2701 }
2702 }
2703
2704 /* Stamp the time, and sequence number,
2705 * convert them to network byte order
2706 */
2707 if (pgh) {
2708 struct timeval timestamp;
2709
2710 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2711 pgh->seq_num = htonl(pkt_dev->seq_num);
2712
2713 do_gettimeofday(&timestamp);
2714 pgh->tv_sec = htonl(timestamp.tv_sec);
2715 pgh->tv_usec = htonl(timestamp.tv_usec);
2716 }
2717
2718 #ifdef CONFIG_XFRM
2719 if (!process_ipsec(pkt_dev, skb, protocol))
2720 return NULL;
2721 #endif
2722
2723 return skb;
2724 }
2725
2726 /*
2727 * scan_ip6, fmt_ip taken from dietlibc-0.21
2728 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2729 *
2730 * Slightly modified for kernel.
2731 * Should be candidate for net/ipv4/utils.c
2732 * --ro
2733 */
2734
2735 static unsigned int scan_ip6(const char *s, char ip[16])
2736 {
2737 unsigned int i;
2738 unsigned int len = 0;
2739 unsigned long u;
2740 char suffix[16];
2741 unsigned int prefixlen = 0;
2742 unsigned int suffixlen = 0;
2743 __be32 tmp;
2744 char *pos;
2745
2746 for (i = 0; i < 16; i++)
2747 ip[i] = 0;
2748
2749 for (;;) {
2750 if (*s == ':') {
2751 len++;
2752 if (s[1] == ':') { /* Found "::", skip to part 2 */
2753 s += 2;
2754 len++;
2755 break;
2756 }
2757 s++;
2758 }
2759
2760 u = simple_strtoul(s, &pos, 16);
2761 i = pos - s;
2762 if (!i)
2763 return 0;
2764 if (prefixlen == 12 && s[i] == '.') {
2765
2766 /* the last 4 bytes may be written as IPv4 address */
2767
2768 tmp = in_aton(s);
2769 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2770 return i + len;
2771 }
2772 ip[prefixlen++] = (u >> 8);
2773 ip[prefixlen++] = (u & 255);
2774 s += i;
2775 len += i;
2776 if (prefixlen == 16)
2777 return len;
2778 }
2779
2780 /* part 2, after "::" */
2781 for (;;) {
2782 if (*s == ':') {
2783 if (suffixlen == 0)
2784 break;
2785 s++;
2786 len++;
2787 } else if (suffixlen != 0)
2788 break;
2789
2790 u = simple_strtol(s, &pos, 16);
2791 i = pos - s;
2792 if (!i) {
2793 if (*s)
2794 len--;
2795 break;
2796 }
2797 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2798 tmp = in_aton(s);
2799 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2800 sizeof(tmp));
2801 suffixlen += 4;
2802 len += strlen(s);
2803 break;
2804 }
2805 suffix[suffixlen++] = (u >> 8);
2806 suffix[suffixlen++] = (u & 255);
2807 s += i;
2808 len += i;
2809 if (prefixlen + suffixlen == 16)
2810 break;
2811 }
2812 for (i = 0; i < suffixlen; i++)
2813 ip[16 - suffixlen + i] = suffix[i];
2814 return len;
2815 }
2816
2817 static char tohex(char hexdigit)
2818 {
2819 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2820 }
2821
2822 static int fmt_xlong(char *s, unsigned int i)
2823 {
2824 char *bak = s;
2825 *s = tohex((i >> 12) & 0xf);
2826 if (s != bak || *s != '0')
2827 ++s;
2828 *s = tohex((i >> 8) & 0xf);
2829 if (s != bak || *s != '0')
2830 ++s;
2831 *s = tohex((i >> 4) & 0xf);
2832 if (s != bak || *s != '0')
2833 ++s;
2834 *s = tohex(i & 0xf);
2835 return s - bak + 1;
2836 }
2837
2838 static unsigned int fmt_ip6(char *s, const char ip[16])
2839 {
2840 unsigned int len;
2841 unsigned int i;
2842 unsigned int temp;
2843 unsigned int compressing;
2844 int j;
2845
2846 len = 0;
2847 compressing = 0;
2848 for (j = 0; j < 16; j += 2) {
2849
2850 #ifdef V4MAPPEDPREFIX
2851 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2852 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2853 temp = strlen(s);
2854 return len + temp;
2855 }
2856 #endif
2857 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2858 (unsigned long)(unsigned char)ip[j + 1];
2859 if (temp == 0) {
2860 if (!compressing) {
2861 compressing = 1;
2862 if (j == 0) {
2863 *s++ = ':';
2864 ++len;
2865 }
2866 }
2867 } else {
2868 if (compressing) {
2869 compressing = 0;
2870 *s++ = ':';
2871 ++len;
2872 }
2873 i = fmt_xlong(s, temp);
2874 len += i;
2875 s += i;
2876 if (j < 14) {
2877 *s++ = ':';
2878 ++len;
2879 }
2880 }
2881 }
2882 if (compressing) {
2883 *s++ = ':';
2884 ++len;
2885 }
2886 *s = 0;
2887 return len;
2888 }
2889
2890 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2891 struct pktgen_dev *pkt_dev)
2892 {
2893 struct sk_buff *skb = NULL;
2894 __u8 *eth;
2895 struct udphdr *udph;
2896 int datalen;
2897 struct ipv6hdr *iph;
2898 struct pktgen_hdr *pgh = NULL;
2899 __be16 protocol = htons(ETH_P_IPV6);
2900 __be32 *mpls;
2901 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2902 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2903 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2904 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2905 u16 queue_map;
2906
2907 if (pkt_dev->nr_labels)
2908 protocol = htons(ETH_P_MPLS_UC);
2909
2910 if (pkt_dev->vlan_id != 0xffff)
2911 protocol = htons(ETH_P_8021Q);
2912
2913 /* Update any of the values, used when we're incrementing various
2914 * fields.
2915 */
2916 queue_map = pkt_dev->cur_queue_map;
2917 mod_cur_headers(pkt_dev);
2918
2919 skb = __netdev_alloc_skb(odev,
2920 pkt_dev->cur_pkt_size + 64
2921 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
2922 if (!skb) {
2923 sprintf(pkt_dev->result, "No memory");
2924 return NULL;
2925 }
2926
2927 skb_reserve(skb, 16);
2928
2929 /* Reserve for ethernet and IP header */
2930 eth = (__u8 *) skb_push(skb, 14);
2931 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2932 if (pkt_dev->nr_labels)
2933 mpls_push(mpls, pkt_dev);
2934
2935 if (pkt_dev->vlan_id != 0xffff) {
2936 if (pkt_dev->svlan_id != 0xffff) {
2937 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2938 *svlan_tci = build_tci(pkt_dev->svlan_id,
2939 pkt_dev->svlan_cfi,
2940 pkt_dev->svlan_p);
2941 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2942 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2943 }
2944 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2945 *vlan_tci = build_tci(pkt_dev->vlan_id,
2946 pkt_dev->vlan_cfi,
2947 pkt_dev->vlan_p);
2948 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2949 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2950 }
2951
2952 skb->network_header = skb->tail;
2953 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2954 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2955 skb_set_queue_mapping(skb, queue_map);
2956 iph = ipv6_hdr(skb);
2957 udph = udp_hdr(skb);
2958
2959 memcpy(eth, pkt_dev->hh, 12);
2960 *(__be16 *) &eth[12] = protocol;
2961
2962 /* Eth + IPh + UDPh + mpls */
2963 datalen = pkt_dev->cur_pkt_size - 14 -
2964 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2965 pkt_dev->pkt_overhead;
2966
2967 if (datalen < sizeof(struct pktgen_hdr)) {
2968 datalen = sizeof(struct pktgen_hdr);
2969 if (net_ratelimit())
2970 printk(KERN_INFO "pktgen: increased datalen to %d\n",
2971 datalen);
2972 }
2973
2974 udph->source = htons(pkt_dev->cur_udp_src);
2975 udph->dest = htons(pkt_dev->cur_udp_dst);
2976 udph->len = htons(datalen + sizeof(struct udphdr));
2977 udph->check = 0; /* No checksum */
2978
2979 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2980
2981 if (pkt_dev->traffic_class) {
2982 /* Version + traffic class + flow (0) */
2983 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2984 }
2985
2986 iph->hop_limit = 32;
2987
2988 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2989 iph->nexthdr = IPPROTO_UDP;
2990
2991 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2992 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2993
2994 skb->mac_header = (skb->network_header - ETH_HLEN -
2995 pkt_dev->pkt_overhead);
2996 skb->protocol = protocol;
2997 skb->dev = odev;
2998 skb->pkt_type = PACKET_HOST;
2999
3000 if (pkt_dev->nfrags <= 0)
3001 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
3002 else {
3003 int frags = pkt_dev->nfrags;
3004 int i;
3005
3006 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
3007
3008 if (frags > MAX_SKB_FRAGS)
3009 frags = MAX_SKB_FRAGS;
3010 if (datalen > frags * PAGE_SIZE) {
3011 skb_put(skb, datalen - frags * PAGE_SIZE);
3012 datalen = frags * PAGE_SIZE;
3013 }
3014
3015 i = 0;
3016 while (datalen > 0) {
3017 struct page *page = alloc_pages(GFP_KERNEL, 0);
3018 skb_shinfo(skb)->frags[i].page = page;
3019 skb_shinfo(skb)->frags[i].page_offset = 0;
3020 skb_shinfo(skb)->frags[i].size =
3021 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
3022 datalen -= skb_shinfo(skb)->frags[i].size;
3023 skb->len += skb_shinfo(skb)->frags[i].size;
3024 skb->data_len += skb_shinfo(skb)->frags[i].size;
3025 i++;
3026 skb_shinfo(skb)->nr_frags = i;
3027 }
3028
3029 while (i < frags) {
3030 int rem;
3031
3032 if (i == 0)
3033 break;
3034
3035 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
3036 if (rem == 0)
3037 break;
3038
3039 skb_shinfo(skb)->frags[i - 1].size -= rem;
3040
3041 skb_shinfo(skb)->frags[i] =
3042 skb_shinfo(skb)->frags[i - 1];
3043 get_page(skb_shinfo(skb)->frags[i].page);
3044 skb_shinfo(skb)->frags[i].page =
3045 skb_shinfo(skb)->frags[i - 1].page;
3046 skb_shinfo(skb)->frags[i].page_offset +=
3047 skb_shinfo(skb)->frags[i - 1].size;
3048 skb_shinfo(skb)->frags[i].size = rem;
3049 i++;
3050 skb_shinfo(skb)->nr_frags = i;
3051 }
3052 }
3053
3054 /* Stamp the time, and sequence number,
3055 * convert them to network byte order
3056 * should we update cloned packets too ?
3057 */
3058 if (pgh) {
3059 struct timeval timestamp;
3060
3061 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
3062 pgh->seq_num = htonl(pkt_dev->seq_num);
3063
3064 do_gettimeofday(&timestamp);
3065 pgh->tv_sec = htonl(timestamp.tv_sec);
3066 pgh->tv_usec = htonl(timestamp.tv_usec);
3067 }
3068 /* pkt_dev->seq_num++; FF: you really mean this? */
3069
3070 return skb;
3071 }
3072
3073 static struct sk_buff *fill_packet(struct net_device *odev,
3074 struct pktgen_dev *pkt_dev)
3075 {
3076 if (pkt_dev->flags & F_IPV6)
3077 return fill_packet_ipv6(odev, pkt_dev);
3078 else
3079 return fill_packet_ipv4(odev, pkt_dev);
3080 }
3081
3082 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3083 {
3084 pkt_dev->seq_num = 1;
3085 pkt_dev->idle_acc = 0;
3086 pkt_dev->sofar = 0;
3087 pkt_dev->tx_bytes = 0;
3088 pkt_dev->errors = 0;
3089 }
3090
3091 /* Set up structure for sending pkts, clear counters */
3092
3093 static void pktgen_run(struct pktgen_thread *t)
3094 {
3095 struct pktgen_dev *pkt_dev;
3096 int started = 0;
3097
3098 pr_debug("pktgen: entering pktgen_run. %p\n", t);
3099
3100 if_lock(t);
3101 list_for_each_entry(pkt_dev, &t->if_list, list) {
3102
3103 /*
3104 * setup odev and create initial packet.
3105 */
3106 pktgen_setup_inject(pkt_dev);
3107
3108 if (pkt_dev->odev) {
3109 pktgen_clear_counters(pkt_dev);
3110 pkt_dev->running = 1; /* Cranke yeself! */
3111 pkt_dev->skb = NULL;
3112 pkt_dev->started_at =
3113 pkt_dev->next_tx = ktime_now();
3114
3115 set_pkt_overhead(pkt_dev);
3116
3117 strcpy(pkt_dev->result, "Starting");
3118 started++;
3119 } else
3120 strcpy(pkt_dev->result, "Error starting");
3121 }
3122 if_unlock(t);
3123 if (started)
3124 t->control &= ~(T_STOP);
3125 }
3126
3127 static void pktgen_stop_all_threads_ifs(void)
3128 {
3129 struct pktgen_thread *t;
3130
3131 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n");
3132
3133 mutex_lock(&pktgen_thread_lock);
3134
3135 list_for_each_entry(t, &pktgen_threads, th_list)
3136 t->control |= T_STOP;
3137
3138 mutex_unlock(&pktgen_thread_lock);
3139 }
3140
3141 static int thread_is_running(const struct pktgen_thread *t)
3142 {
3143 const struct pktgen_dev *pkt_dev;
3144
3145 list_for_each_entry(pkt_dev, &t->if_list, list)
3146 if (pkt_dev->running)
3147 return 1;
3148 return 0;
3149 }
3150
3151 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3152 {
3153 if_lock(t);
3154
3155 while (thread_is_running(t)) {
3156
3157 if_unlock(t);
3158
3159 msleep_interruptible(100);
3160
3161 if (signal_pending(current))
3162 goto signal;
3163 if_lock(t);
3164 }
3165 if_unlock(t);
3166 return 1;
3167 signal:
3168 return 0;
3169 }
3170
3171 static int pktgen_wait_all_threads_run(void)
3172 {
3173 struct pktgen_thread *t;
3174 int sig = 1;
3175
3176 mutex_lock(&pktgen_thread_lock);
3177
3178 list_for_each_entry(t, &pktgen_threads, th_list) {
3179 sig = pktgen_wait_thread_run(t);
3180 if (sig == 0)
3181 break;
3182 }
3183
3184 if (sig == 0)
3185 list_for_each_entry(t, &pktgen_threads, th_list)
3186 t->control |= (T_STOP);
3187
3188 mutex_unlock(&pktgen_thread_lock);
3189 return sig;
3190 }
3191
3192 static void pktgen_run_all_threads(void)
3193 {
3194 struct pktgen_thread *t;
3195
3196 pr_debug("pktgen: entering pktgen_run_all_threads.\n");
3197
3198 mutex_lock(&pktgen_thread_lock);
3199
3200 list_for_each_entry(t, &pktgen_threads, th_list)
3201 t->control |= (T_RUN);
3202
3203 mutex_unlock(&pktgen_thread_lock);
3204
3205 /* Propagate thread->control */
3206 schedule_timeout_interruptible(msecs_to_jiffies(125));
3207
3208 pktgen_wait_all_threads_run();
3209 }
3210
3211 static void pktgen_reset_all_threads(void)
3212 {
3213 struct pktgen_thread *t;
3214
3215 pr_debug("pktgen: entering pktgen_reset_all_threads.\n");
3216
3217 mutex_lock(&pktgen_thread_lock);
3218
3219 list_for_each_entry(t, &pktgen_threads, th_list)
3220 t->control |= (T_REMDEVALL);
3221
3222 mutex_unlock(&pktgen_thread_lock);
3223
3224 /* Propagate thread->control */
3225 schedule_timeout_interruptible(msecs_to_jiffies(125));
3226
3227 pktgen_wait_all_threads_run();
3228 }
3229
3230 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3231 {
3232 __u64 bps, mbps, pps;
3233 char *p = pkt_dev->result;
3234 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3235 pkt_dev->started_at);
3236 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3237
3238 p += sprintf(p, "OK: %llu(c%llu+d%llu) nsec, %llu (%dbyte,%dfrags)\n",
3239 (unsigned long long)ktime_to_us(elapsed),
3240 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3241 (unsigned long long)ktime_to_us(idle),
3242 (unsigned long long)pkt_dev->sofar,
3243 pkt_dev->cur_pkt_size, nr_frags);
3244
3245 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3246 ktime_to_ns(elapsed));
3247
3248 bps = pps * 8 * pkt_dev->cur_pkt_size;
3249
3250 mbps = bps;
3251 do_div(mbps, 1000000);
3252 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3253 (unsigned long long)pps,
3254 (unsigned long long)mbps,
3255 (unsigned long long)bps,
3256 (unsigned long long)pkt_dev->errors);
3257 }
3258
3259 /* Set stopped-at timer, remove from running list, do counters & statistics */
3260 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3261 {
3262 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3263
3264 if (!pkt_dev->running) {
3265 printk(KERN_WARNING "pktgen: interface: %s is already "
3266 "stopped\n", pkt_dev->odevname);
3267 return -EINVAL;
3268 }
3269
3270 kfree_skb(pkt_dev->skb);
3271 pkt_dev->skb = NULL;
3272 pkt_dev->stopped_at = ktime_now();
3273 pkt_dev->running = 0;
3274
3275 show_results(pkt_dev, nr_frags);
3276
3277 return 0;
3278 }
3279
3280 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3281 {
3282 struct pktgen_dev *pkt_dev, *best = NULL;
3283
3284 if_lock(t);
3285
3286 list_for_each_entry(pkt_dev, &t->if_list, list) {
3287 if (!pkt_dev->running)
3288 continue;
3289 if (best == NULL)
3290 best = pkt_dev;
3291 else if (ktime_lt(pkt_dev->next_tx, best->next_tx))
3292 best = pkt_dev;
3293 }
3294 if_unlock(t);
3295 return best;
3296 }
3297
3298 static void pktgen_stop(struct pktgen_thread *t)
3299 {
3300 struct pktgen_dev *pkt_dev;
3301
3302 pr_debug("pktgen: entering pktgen_stop\n");
3303
3304 if_lock(t);
3305
3306 list_for_each_entry(pkt_dev, &t->if_list, list) {
3307 pktgen_stop_device(pkt_dev);
3308 }
3309
3310 if_unlock(t);
3311 }
3312
3313 /*
3314 * one of our devices needs to be removed - find it
3315 * and remove it
3316 */
3317 static void pktgen_rem_one_if(struct pktgen_thread *t)
3318 {
3319 struct list_head *q, *n;
3320 struct pktgen_dev *cur;
3321
3322 pr_debug("pktgen: entering pktgen_rem_one_if\n");
3323
3324 if_lock(t);
3325
3326 list_for_each_safe(q, n, &t->if_list) {
3327 cur = list_entry(q, struct pktgen_dev, list);
3328
3329 if (!cur->removal_mark)
3330 continue;
3331
3332 kfree_skb(cur->skb);
3333 cur->skb = NULL;
3334
3335 pktgen_remove_device(t, cur);
3336
3337 break;
3338 }
3339
3340 if_unlock(t);
3341 }
3342
3343 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3344 {
3345 struct list_head *q, *n;
3346 struct pktgen_dev *cur;
3347
3348 /* Remove all devices, free mem */
3349
3350 pr_debug("pktgen: entering pktgen_rem_all_ifs\n");
3351 if_lock(t);
3352
3353 list_for_each_safe(q, n, &t->if_list) {
3354 cur = list_entry(q, struct pktgen_dev, list);
3355
3356 kfree_skb(cur->skb);
3357 cur->skb = NULL;
3358
3359 pktgen_remove_device(t, cur);
3360 }
3361
3362 if_unlock(t);
3363 }
3364
3365 static void pktgen_rem_thread(struct pktgen_thread *t)
3366 {
3367 /* Remove from the thread list */
3368
3369 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3370
3371 mutex_lock(&pktgen_thread_lock);
3372
3373 list_del(&t->th_list);
3374
3375 mutex_unlock(&pktgen_thread_lock);
3376 }
3377
3378 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3379 {
3380 ktime_t idle_start = ktime_now();
3381 schedule();
3382 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3383 }
3384
3385 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3386 {
3387 ktime_t idle_start = ktime_now();
3388
3389 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3390 if (signal_pending(current))
3391 break;
3392
3393 if (need_resched())
3394 pktgen_resched(pkt_dev);
3395 else
3396 cpu_relax();
3397 }
3398 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3399 }
3400
3401 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3402 {
3403 struct net_device *odev = pkt_dev->odev;
3404 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3405 = odev->netdev_ops->ndo_start_xmit;
3406 struct netdev_queue *txq;
3407 u16 queue_map;
3408 int ret;
3409
3410 /* If device is offline, then don't send */
3411 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3412 pktgen_stop_device(pkt_dev);
3413 return;
3414 }
3415
3416 /* This is max DELAY, this has special meaning of
3417 * "never transmit"
3418 */
3419 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3420 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX);
3421 return;
3422 }
3423
3424 /* If no skb or clone count exhausted then get new one */
3425 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3426 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3427 /* build a new pkt */
3428 kfree_skb(pkt_dev->skb);
3429
3430 pkt_dev->skb = fill_packet(odev, pkt_dev);
3431 if (pkt_dev->skb == NULL) {
3432 printk(KERN_ERR "pktgen: ERROR: couldn't "
3433 "allocate skb in fill_packet.\n");
3434 schedule();
3435 pkt_dev->clone_count--; /* back out increment, OOM */
3436 return;
3437 }
3438 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3439 pkt_dev->allocated_skbs++;
3440 pkt_dev->clone_count = 0; /* reset counter */
3441 }
3442
3443 if (pkt_dev->delay && pkt_dev->last_ok)
3444 spin(pkt_dev, pkt_dev->next_tx);
3445
3446 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3447 txq = netdev_get_tx_queue(odev, queue_map);
3448
3449 __netif_tx_lock_bh(txq);
3450
3451 if (unlikely(netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq))) {
3452 ret = NETDEV_TX_BUSY;
3453 pkt_dev->last_ok = 0;
3454 goto unlock;
3455 }
3456 atomic_inc(&(pkt_dev->skb->users));
3457 ret = (*xmit)(pkt_dev->skb, odev);
3458
3459 switch (ret) {
3460 case NETDEV_TX_OK:
3461 txq_trans_update(txq);
3462 pkt_dev->last_ok = 1;
3463 pkt_dev->sofar++;
3464 pkt_dev->seq_num++;
3465 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3466 break;
3467 case NET_XMIT_DROP:
3468 case NET_XMIT_CN:
3469 case NET_XMIT_POLICED:
3470 /* skb has been consumed */
3471 pkt_dev->errors++;
3472 break;
3473 default: /* Drivers are not supposed to return other values! */
3474 if (net_ratelimit())
3475 pr_info("pktgen: %s xmit error: %d\n",
3476 pkt_dev->odevname, ret);
3477 pkt_dev->errors++;
3478 /* fallthru */
3479 case NETDEV_TX_LOCKED:
3480 case NETDEV_TX_BUSY:
3481 /* Retry it next time */
3482 atomic_dec(&(pkt_dev->skb->users));
3483 pkt_dev->last_ok = 0;
3484 }
3485 unlock:
3486 __netif_tx_unlock_bh(txq);
3487
3488 /* If pkt_dev->count is zero, then run forever */
3489 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3490 pktgen_wait_for_skb(pkt_dev);
3491
3492 /* Done with this */
3493 pktgen_stop_device(pkt_dev);
3494 }
3495 }
3496
3497 /*
3498 * Main loop of the thread goes here
3499 */
3500
3501 static int pktgen_thread_worker(void *arg)
3502 {
3503 DEFINE_WAIT(wait);
3504 struct pktgen_thread *t = arg;
3505 struct pktgen_dev *pkt_dev = NULL;
3506 int cpu = t->cpu;
3507
3508 BUG_ON(smp_processor_id() != cpu);
3509
3510 init_waitqueue_head(&t->queue);
3511 complete(&t->start_done);
3512
3513 pr_debug("pktgen: starting pktgen/%d: pid=%d\n",
3514 cpu, task_pid_nr(current));
3515
3516 set_current_state(TASK_INTERRUPTIBLE);
3517
3518 set_freezable();
3519
3520 while (!kthread_should_stop()) {
3521 pkt_dev = next_to_run(t);
3522
3523 if (unlikely(!pkt_dev && t->control == 0)) {
3524 wait_event_interruptible_timeout(t->queue,
3525 t->control != 0,
3526 HZ/10);
3527 continue;
3528 }
3529
3530 __set_current_state(TASK_RUNNING);
3531
3532 if (likely(pkt_dev)) {
3533 pktgen_xmit(pkt_dev);
3534
3535 if (need_resched())
3536 pktgen_resched(pkt_dev);
3537 else
3538 cpu_relax();
3539 }
3540
3541 if (t->control & T_STOP) {
3542 pktgen_stop(t);
3543 t->control &= ~(T_STOP);
3544 }
3545
3546 if (t->control & T_RUN) {
3547 pktgen_run(t);
3548 t->control &= ~(T_RUN);
3549 }
3550
3551 if (t->control & T_REMDEVALL) {
3552 pktgen_rem_all_ifs(t);
3553 t->control &= ~(T_REMDEVALL);
3554 }
3555
3556 if (t->control & T_REMDEV) {
3557 pktgen_rem_one_if(t);
3558 t->control &= ~(T_REMDEV);
3559 }
3560
3561 try_to_freeze();
3562
3563 set_current_state(TASK_INTERRUPTIBLE);
3564 }
3565
3566 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm);
3567 pktgen_stop(t);
3568
3569 pr_debug("pktgen: %s removing all device\n", t->tsk->comm);
3570 pktgen_rem_all_ifs(t);
3571
3572 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm);
3573 pktgen_rem_thread(t);
3574
3575 return 0;
3576 }
3577
3578 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3579 const char *ifname, bool exact)
3580 {
3581 struct pktgen_dev *p, *pkt_dev = NULL;
3582 size_t len = strlen(ifname);
3583
3584 if_lock(t);
3585 list_for_each_entry(p, &t->if_list, list)
3586 if (strncmp(p->odevname, ifname, len) == 0) {
3587 if (p->odevname[len]) {
3588 if (exact || p->odevname[len] != '@')
3589 continue;
3590 }
3591 pkt_dev = p;
3592 break;
3593 }
3594
3595 if_unlock(t);
3596 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev);
3597 return pkt_dev;
3598 }
3599
3600 /*
3601 * Adds a dev at front of if_list.
3602 */
3603
3604 static int add_dev_to_thread(struct pktgen_thread *t,
3605 struct pktgen_dev *pkt_dev)
3606 {
3607 int rv = 0;
3608
3609 if_lock(t);
3610
3611 if (pkt_dev->pg_thread) {
3612 printk(KERN_ERR "pktgen: ERROR: already assigned "
3613 "to a thread.\n");
3614 rv = -EBUSY;
3615 goto out;
3616 }
3617
3618 list_add(&pkt_dev->list, &t->if_list);
3619 pkt_dev->pg_thread = t;
3620 pkt_dev->running = 0;
3621
3622 out:
3623 if_unlock(t);
3624 return rv;
3625 }
3626
3627 /* Called under thread lock */
3628
3629 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3630 {
3631 struct pktgen_dev *pkt_dev;
3632 int err;
3633 int node = cpu_to_node(t->cpu);
3634
3635 /* We don't allow a device to be on several threads */
3636
3637 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3638 if (pkt_dev) {
3639 printk(KERN_ERR "pktgen: ERROR: interface already used.\n");
3640 return -EBUSY;
3641 }
3642
3643 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3644 if (!pkt_dev)
3645 return -ENOMEM;
3646
3647 strcpy(pkt_dev->odevname, ifname);
3648 pkt_dev->flows = vmalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3649 node);
3650 if (pkt_dev->flows == NULL) {
3651 kfree(pkt_dev);
3652 return -ENOMEM;
3653 }
3654 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3655
3656 pkt_dev->removal_mark = 0;
3657 pkt_dev->min_pkt_size = ETH_ZLEN;
3658 pkt_dev->max_pkt_size = ETH_ZLEN;
3659 pkt_dev->nfrags = 0;
3660 pkt_dev->clone_skb = pg_clone_skb_d;
3661 pkt_dev->delay = pg_delay_d;
3662 pkt_dev->count = pg_count_d;
3663 pkt_dev->sofar = 0;
3664 pkt_dev->udp_src_min = 9; /* sink port */
3665 pkt_dev->udp_src_max = 9;
3666 pkt_dev->udp_dst_min = 9;
3667 pkt_dev->udp_dst_max = 9;
3668
3669 pkt_dev->vlan_p = 0;
3670 pkt_dev->vlan_cfi = 0;
3671 pkt_dev->vlan_id = 0xffff;
3672 pkt_dev->svlan_p = 0;
3673 pkt_dev->svlan_cfi = 0;
3674 pkt_dev->svlan_id = 0xffff;
3675
3676 err = pktgen_setup_dev(pkt_dev, ifname);
3677 if (err)
3678 goto out1;
3679
3680 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3681 &pktgen_if_fops, pkt_dev);
3682 if (!pkt_dev->entry) {
3683 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3684 PG_PROC_DIR, ifname);
3685 err = -EINVAL;
3686 goto out2;
3687 }
3688 #ifdef CONFIG_XFRM
3689 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3690 pkt_dev->ipsproto = IPPROTO_ESP;
3691 #endif
3692
3693 return add_dev_to_thread(t, pkt_dev);
3694 out2:
3695 dev_put(pkt_dev->odev);
3696 out1:
3697 #ifdef CONFIG_XFRM
3698 free_SAs(pkt_dev);
3699 #endif
3700 vfree(pkt_dev->flows);
3701 kfree(pkt_dev);
3702 return err;
3703 }
3704
3705 static int __init pktgen_create_thread(int cpu)
3706 {
3707 struct pktgen_thread *t;
3708 struct proc_dir_entry *pe;
3709 struct task_struct *p;
3710
3711 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3712 cpu_to_node(cpu));
3713 if (!t) {
3714 printk(KERN_ERR "pktgen: ERROR: out of memory, can't "
3715 "create new thread.\n");
3716 return -ENOMEM;
3717 }
3718
3719 spin_lock_init(&t->if_lock);
3720 t->cpu = cpu;
3721
3722 INIT_LIST_HEAD(&t->if_list);
3723
3724 list_add_tail(&t->th_list, &pktgen_threads);
3725 init_completion(&t->start_done);
3726
3727 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu);
3728 if (IS_ERR(p)) {
3729 printk(KERN_ERR "pktgen: kernel_thread() failed "
3730 "for cpu %d\n", t->cpu);
3731 list_del(&t->th_list);
3732 kfree(t);
3733 return PTR_ERR(p);
3734 }
3735 kthread_bind(p, cpu);
3736 t->tsk = p;
3737
3738 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3739 &pktgen_thread_fops, t);
3740 if (!pe) {
3741 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3742 PG_PROC_DIR, t->tsk->comm);
3743 kthread_stop(p);
3744 list_del(&t->th_list);
3745 kfree(t);
3746 return -EINVAL;
3747 }
3748
3749 wake_up_process(p);
3750 wait_for_completion(&t->start_done);
3751
3752 return 0;
3753 }
3754
3755 /*
3756 * Removes a device from the thread if_list.
3757 */
3758 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3759 struct pktgen_dev *pkt_dev)
3760 {
3761 struct list_head *q, *n;
3762 struct pktgen_dev *p;
3763
3764 list_for_each_safe(q, n, &t->if_list) {
3765 p = list_entry(q, struct pktgen_dev, list);
3766 if (p == pkt_dev)
3767 list_del(&p->list);
3768 }
3769 }
3770
3771 static int pktgen_remove_device(struct pktgen_thread *t,
3772 struct pktgen_dev *pkt_dev)
3773 {
3774
3775 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev);
3776
3777 if (pkt_dev->running) {
3778 printk(KERN_WARNING "pktgen: WARNING: trying to remove a "
3779 "running interface, stopping it now.\n");
3780 pktgen_stop_device(pkt_dev);
3781 }
3782
3783 /* Dis-associate from the interface */
3784
3785 if (pkt_dev->odev) {
3786 dev_put(pkt_dev->odev);
3787 pkt_dev->odev = NULL;
3788 }
3789
3790 /* And update the thread if_list */
3791
3792 _rem_dev_from_if_list(t, pkt_dev);
3793
3794 if (pkt_dev->entry)
3795 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3796
3797 #ifdef CONFIG_XFRM
3798 free_SAs(pkt_dev);
3799 #endif
3800 vfree(pkt_dev->flows);
3801 kfree(pkt_dev);
3802 return 0;
3803 }
3804
3805 static int __init pg_init(void)
3806 {
3807 int cpu;
3808 struct proc_dir_entry *pe;
3809
3810 printk(KERN_INFO "%s", version);
3811
3812 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3813 if (!pg_proc_dir)
3814 return -ENODEV;
3815
3816 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3817 if (pe == NULL) {
3818 printk(KERN_ERR "pktgen: ERROR: cannot create %s "
3819 "procfs entry.\n", PGCTRL);
3820 proc_net_remove(&init_net, PG_PROC_DIR);
3821 return -EINVAL;
3822 }
3823
3824 /* Register us to receive netdevice events */
3825 register_netdevice_notifier(&pktgen_notifier_block);
3826
3827 for_each_online_cpu(cpu) {
3828 int err;
3829
3830 err = pktgen_create_thread(cpu);
3831 if (err)
3832 printk(KERN_WARNING "pktgen: WARNING: Cannot create "
3833 "thread for cpu %d (%d)\n", cpu, err);
3834 }
3835
3836 if (list_empty(&pktgen_threads)) {
3837 printk(KERN_ERR "pktgen: ERROR: Initialization failed for "
3838 "all threads\n");
3839 unregister_netdevice_notifier(&pktgen_notifier_block);
3840 remove_proc_entry(PGCTRL, pg_proc_dir);
3841 proc_net_remove(&init_net, PG_PROC_DIR);
3842 return -ENODEV;
3843 }
3844
3845 return 0;
3846 }
3847
3848 static void __exit pg_cleanup(void)
3849 {
3850 struct pktgen_thread *t;
3851 struct list_head *q, *n;
3852 wait_queue_head_t queue;
3853 init_waitqueue_head(&queue);
3854
3855 /* Stop all interfaces & threads */
3856
3857 list_for_each_safe(q, n, &pktgen_threads) {
3858 t = list_entry(q, struct pktgen_thread, th_list);
3859 kthread_stop(t->tsk);
3860 kfree(t);
3861 }
3862
3863 /* Un-register us from receiving netdevice events */
3864 unregister_netdevice_notifier(&pktgen_notifier_block);
3865
3866 /* Clean up proc file system */
3867 remove_proc_entry(PGCTRL, pg_proc_dir);
3868 proc_net_remove(&init_net, PG_PROC_DIR);
3869 }
3870
3871 module_init(pg_init);
3872 module_exit(pg_cleanup);
3873
3874 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3875 MODULE_DESCRIPTION("Packet Generator tool");
3876 MODULE_LICENSE("GPL");
3877 MODULE_VERSION(VERSION);
3878 module_param(pg_count_d, int, 0);
3879 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3880 module_param(pg_delay_d, int, 0);
3881 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3882 module_param(pg_clone_skb_d, int, 0);
3883 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3884 module_param(debug, int, 0);
3885 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
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