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parisc: Replace old style lock init in smp.c
[linux-2.6/kvm.git] / net / core / pktgen.c
bloba23b45f08ec9ce6644cfc350cb3bc393c167ab92
1 /*
2 * Authors:
3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
4 * Uppsala University and
5 * Swedish University of Agricultural Sciences
6 *
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 * Ben Greear <greearb@candelatech.com>
9 * Jens Låås <jens.laas@data.slu.se>
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 *
16 *
17 * A tool for loading the network with preconfigurated packets.
18 * The tool is implemented as a linux module. Parameters are output
19 * device, delay (to hard_xmit), number of packets, and whether
20 * to use multiple SKBs or just the same one.
21 * pktgen uses the installed interface's output routine.
22 *
23 * Additional hacking by:
24 *
25 * Jens.Laas@data.slu.se
26 * Improved by ANK. 010120.
27 * Improved by ANK even more. 010212.
28 * MAC address typo fixed. 010417 --ro
29 * Integrated. 020301 --DaveM
30 * Added multiskb option 020301 --DaveM
31 * Scaling of results. 020417--sigurdur@linpro.no
32 * Significant re-work of the module:
33 * * Convert to threaded model to more efficiently be able to transmit
34 * and receive on multiple interfaces at once.
35 * * Converted many counters to __u64 to allow longer runs.
36 * * Allow configuration of ranges, like min/max IP address, MACs,
37 * and UDP-ports, for both source and destination, and can
38 * set to use a random distribution or sequentially walk the range.
39 * * Can now change most values after starting.
40 * * Place 12-byte packet in UDP payload with magic number,
41 * sequence number, and timestamp.
42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and
43 * latencies (with micro-second) precision.
44 * * Add IOCTL interface to easily get counters & configuration.
45 * --Ben Greear <greearb@candelatech.com>
46 *
47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
49 * as a "fastpath" with a configurable number of clones after alloc's.
50 * clone_skb=0 means all packets are allocated this also means ranges time
51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
52 * clones.
53 *
54 * Also moved to /proc/net/pktgen/
55 * --ro
56 *
57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
58 * mistakes. Also merged in DaveM's patch in the -pre6 patch.
59 * --Ben Greear <greearb@candelatech.com>
60 *
61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
62 *
63 *
64 * 021124 Finished major redesign and rewrite for new functionality.
65 * See Documentation/networking/pktgen.txt for how to use this.
66 *
67 * The new operation:
68 * For each CPU one thread/process is created at start. This process checks
69 * for running devices in the if_list and sends packets until count is 0 it
70 * also the thread checks the thread->control which is used for inter-process
71 * communication. controlling process "posts" operations to the threads this
72 * way. The if_lock should be possible to remove when add/rem_device is merged
73 * into this too.
74 *
75 * By design there should only be *one* "controlling" process. In practice
76 * multiple write accesses gives unpredictable result. Understood by "write"
77 * to /proc gives result code thats should be read be the "writer".
78 * For practical use this should be no problem.
79 *
80 * Note when adding devices to a specific CPU there good idea to also assign
81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
82 * --ro
83 *
84 * Fix refcount off by one if first packet fails, potential null deref,
85 * memleak 030710- KJP
86 *
87 * First "ranges" functionality for ipv6 030726 --ro
88 *
89 * Included flow support. 030802 ANK.
90 *
91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
92 *
93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
95 *
96 * New xmit() return, do_div and misc clean up by Stephen Hemminger
97 * <shemminger@osdl.org> 040923
98 *
99 * Randy Dunlap fixed u64 printk compiler waring
100 *
101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
103 *
104 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
106 *
107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
108 * 050103
109 *
110 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
111 *
112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
113 *
114 * Fixed src_mac command to set source mac of packet to value specified in
115 * command by Adit Ranadive <adit.262@gmail.com>
116 *
117 */
118 #include <linux/sys.h>
119 #include <linux/types.h>
120 #include <linux/module.h>
121 #include <linux/moduleparam.h>
122 #include <linux/kernel.h>
123 #include <linux/mutex.h>
124 #include <linux/sched.h>
125 #include <linux/slab.h>
126 #include <linux/vmalloc.h>
127 #include <linux/unistd.h>
128 #include <linux/string.h>
129 #include <linux/ptrace.h>
130 #include <linux/errno.h>
131 #include <linux/ioport.h>
132 #include <linux/interrupt.h>
133 #include <linux/capability.h>
134 #include <linux/hrtimer.h>
135 #include <linux/freezer.h>
136 #include <linux/delay.h>
137 #include <linux/timer.h>
138 #include <linux/list.h>
139 #include <linux/init.h>
140 #include <linux/skbuff.h>
141 #include <linux/netdevice.h>
142 #include <linux/inet.h>
143 #include <linux/inetdevice.h>
144 #include <linux/rtnetlink.h>
145 #include <linux/if_arp.h>
146 #include <linux/if_vlan.h>
147 #include <linux/in.h>
148 #include <linux/ip.h>
149 #include <linux/ipv6.h>
150 #include <linux/udp.h>
151 #include <linux/proc_fs.h>
152 #include <linux/seq_file.h>
153 #include <linux/wait.h>
154 #include <linux/etherdevice.h>
155 #include <linux/kthread.h>
156 #include <net/net_namespace.h>
157 #include <net/checksum.h>
158 #include <net/ipv6.h>
159 #include <net/addrconf.h>
160 #ifdef CONFIG_XFRM
161 #include <net/xfrm.h>
162 #endif
163 #include <asm/byteorder.h>
164 #include <linux/rcupdate.h>
165 #include <linux/bitops.h>
166 #include <linux/io.h>
167 #include <linux/timex.h>
168 #include <linux/uaccess.h>
169 #include <asm/dma.h>
170 #include <asm/div64.h> /* do_div */
171
172 #define VERSION "2.72"
173 #define IP_NAME_SZ 32
174 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
175 #define MPLS_STACK_BOTTOM htonl(0x00000100)
176
177 /* Device flag bits */
178 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
179 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
180 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
181 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
182 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
183 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
184 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
185 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
186 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
187 #define F_VID_RND (1<<9) /* Random VLAN ID */
188 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
189 #define F_FLOW_SEQ (1<<11) /* Sequential flows */
190 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */
191 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
192 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
193
194 /* Thread control flag bits */
195 #define T_STOP (1<<0) /* Stop run */
196 #define T_RUN (1<<1) /* Start run */
197 #define T_REMDEVALL (1<<2) /* Remove all devs */
198 #define T_REMDEV (1<<3) /* Remove one dev */
199
200 /* If lock -- can be removed after some work */
201 #define if_lock(t) spin_lock(&(t->if_lock));
202 #define if_unlock(t) spin_unlock(&(t->if_lock));
203
204 /* Used to help with determining the pkts on receive */
205 #define PKTGEN_MAGIC 0xbe9be955
206 #define PG_PROC_DIR "pktgen"
207 #define PGCTRL "pgctrl"
208 static struct proc_dir_entry *pg_proc_dir;
209
210 #define MAX_CFLOWS 65536
211
212 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
213 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
214
215 struct flow_state {
216 __be32 cur_daddr;
217 int count;
218 #ifdef CONFIG_XFRM
219 struct xfrm_state *x;
220 #endif
221 __u32 flags;
222 };
223
224 /* flow flag bits */
225 #define F_INIT (1<<0) /* flow has been initialized */
226
227 struct pktgen_dev {
228 /*
229 * Try to keep frequent/infrequent used vars. separated.
230 */
231 struct proc_dir_entry *entry; /* proc file */
232 struct pktgen_thread *pg_thread;/* the owner */
233 struct list_head list; /* chaining in the thread's run-queue */
234
235 int running; /* if false, the test will stop */
236
237 /* If min != max, then we will either do a linear iteration, or
238 * we will do a random selection from within the range.
239 */
240 __u32 flags;
241 int removal_mark; /* non-zero => the device is marked for
242 * removal by worker thread */
243
244 int min_pkt_size; /* = ETH_ZLEN; */
245 int max_pkt_size; /* = ETH_ZLEN; */
246 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
247 int nfrags;
248 u64 delay; /* nano-seconds */
249
250 __u64 count; /* Default No packets to send */
251 __u64 sofar; /* How many pkts we've sent so far */
252 __u64 tx_bytes; /* How many bytes we've transmitted */
253 __u64 errors; /* Errors when trying to transmit,
254 pkts will be re-sent */
255
256 /* runtime counters relating to clone_skb */
257
258 __u64 allocated_skbs;
259 __u32 clone_count;
260 int last_ok; /* Was last skb sent?
261 * Or a failed transmit of some sort?
262 * This will keep sequence numbers in order
263 */
264 ktime_t next_tx;
265 ktime_t started_at;
266 ktime_t stopped_at;
267 u64 idle_acc; /* nano-seconds */
268
269 __u32 seq_num;
270
271 int clone_skb; /*
272 * Use multiple SKBs during packet gen.
273 * If this number is greater than 1, then
274 * that many copies of the same packet will be
275 * sent before a new packet is allocated.
276 * If you want to send 1024 identical packets
277 * before creating a new packet,
278 * set clone_skb to 1024.
279 */
280
281 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
282 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
283 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
284 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
285
286 struct in6_addr in6_saddr;
287 struct in6_addr in6_daddr;
288 struct in6_addr cur_in6_daddr;
289 struct in6_addr cur_in6_saddr;
290 /* For ranges */
291 struct in6_addr min_in6_daddr;
292 struct in6_addr max_in6_daddr;
293 struct in6_addr min_in6_saddr;
294 struct in6_addr max_in6_saddr;
295
296 /* If we're doing ranges, random or incremental, then this
297 * defines the min/max for those ranges.
298 */
299 __be32 saddr_min; /* inclusive, source IP address */
300 __be32 saddr_max; /* exclusive, source IP address */
301 __be32 daddr_min; /* inclusive, dest IP address */
302 __be32 daddr_max; /* exclusive, dest IP address */
303
304 __u16 udp_src_min; /* inclusive, source UDP port */
305 __u16 udp_src_max; /* exclusive, source UDP port */
306 __u16 udp_dst_min; /* inclusive, dest UDP port */
307 __u16 udp_dst_max; /* exclusive, dest UDP port */
308
309 /* DSCP + ECN */
310 __u8 tos; /* six MSB of (former) IPv4 TOS
311 are for dscp codepoint */
312 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
313 (see RFC 3260, sec. 4) */
314
315 /* MPLS */
316 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
317 __be32 labels[MAX_MPLS_LABELS];
318
319 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
320 __u8 vlan_p;
321 __u8 vlan_cfi;
322 __u16 vlan_id; /* 0xffff means no vlan tag */
323
324 __u8 svlan_p;
325 __u8 svlan_cfi;
326 __u16 svlan_id; /* 0xffff means no svlan tag */
327
328 __u32 src_mac_count; /* How many MACs to iterate through */
329 __u32 dst_mac_count; /* How many MACs to iterate through */
330
331 unsigned char dst_mac[ETH_ALEN];
332 unsigned char src_mac[ETH_ALEN];
333
334 __u32 cur_dst_mac_offset;
335 __u32 cur_src_mac_offset;
336 __be32 cur_saddr;
337 __be32 cur_daddr;
338 __u16 ip_id;
339 __u16 cur_udp_dst;
340 __u16 cur_udp_src;
341 __u16 cur_queue_map;
342 __u32 cur_pkt_size;
343 __u32 last_pkt_size;
344
345 __u8 hh[14];
346 /* = {
347 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
348
349 We fill in SRC address later
350 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
351 0x08, 0x00
352 };
353 */
354 __u16 pad; /* pad out the hh struct to an even 16 bytes */
355
356 struct sk_buff *skb; /* skb we are to transmit next, used for when we
357 * are transmitting the same one multiple times
358 */
359 struct net_device *odev; /* The out-going device.
360 * Note that the device should have it's
361 * pg_info pointer pointing back to this
362 * device.
363 * Set when the user specifies the out-going
364 * device name (not when the inject is
365 * started as it used to do.)
366 */
367 char odevname[32];
368 struct flow_state *flows;
369 unsigned cflows; /* Concurrent flows (config) */
370 unsigned lflow; /* Flow length (config) */
371 unsigned nflows; /* accumulated flows (stats) */
372 unsigned curfl; /* current sequenced flow (state)*/
373
374 u16 queue_map_min;
375 u16 queue_map_max;
376
377 #ifdef CONFIG_XFRM
378 __u8 ipsmode; /* IPSEC mode (config) */
379 __u8 ipsproto; /* IPSEC type (config) */
380 #endif
381 char result[512];
382 };
383
384 struct pktgen_hdr {
385 __be32 pgh_magic;
386 __be32 seq_num;
387 __be32 tv_sec;
388 __be32 tv_usec;
389 };
390
391 struct pktgen_thread {
392 spinlock_t if_lock; /* for list of devices */
393 struct list_head if_list; /* All device here */
394 struct list_head th_list;
395 struct task_struct *tsk;
396 char result[512];
397
398 /* Field for thread to receive "posted" events terminate,
399 stop ifs etc. */
400
401 u32 control;
402 int cpu;
403
404 wait_queue_head_t queue;
405 struct completion start_done;
406 };
407
408 #define REMOVE 1
409 #define FIND 0
410
411 static inline ktime_t ktime_now(void)
412 {
413 struct timespec ts;
414 ktime_get_ts(&ts);
415
416 return timespec_to_ktime(ts);
417 }
418
419 /* This works even if 32 bit because of careful byte order choice */
420 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2)
421 {
422 return cmp1.tv64 < cmp2.tv64;
423 }
424
425 static const char version[] =
426 "pktgen " VERSION ": Packet Generator for packet performance testing.\n";
427
428 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
429 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
430 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
431 const char *ifname, bool exact);
432 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
433 static void pktgen_run_all_threads(void);
434 static void pktgen_reset_all_threads(void);
435 static void pktgen_stop_all_threads_ifs(void);
436
437 static void pktgen_stop(struct pktgen_thread *t);
438 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
439
440 static unsigned int scan_ip6(const char *s, char ip[16]);
441 static unsigned int fmt_ip6(char *s, const char ip[16]);
442
443 /* Module parameters, defaults. */
444 static int pg_count_d __read_mostly = 1000;
445 static int pg_delay_d __read_mostly;
446 static int pg_clone_skb_d __read_mostly;
447 static int debug __read_mostly;
448
449 static DEFINE_MUTEX(pktgen_thread_lock);
450 static LIST_HEAD(pktgen_threads);
451
452 static struct notifier_block pktgen_notifier_block = {
453 .notifier_call = pktgen_device_event,
454 };
455
456 /*
457 * /proc handling functions
458 *
459 */
460
461 static int pgctrl_show(struct seq_file *seq, void *v)
462 {
463 seq_puts(seq, version);
464 return 0;
465 }
466
467 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
468 size_t count, loff_t *ppos)
469 {
470 int err = 0;
471 char data[128];
472
473 if (!capable(CAP_NET_ADMIN)) {
474 err = -EPERM;
475 goto out;
476 }
477
478 if (count > sizeof(data))
479 count = sizeof(data);
480
481 if (copy_from_user(data, buf, count)) {
482 err = -EFAULT;
483 goto out;
484 }
485 data[count - 1] = 0; /* Make string */
486
487 if (!strcmp(data, "stop"))
488 pktgen_stop_all_threads_ifs();
489
490 else if (!strcmp(data, "start"))
491 pktgen_run_all_threads();
492
493 else if (!strcmp(data, "reset"))
494 pktgen_reset_all_threads();
495
496 else
497 printk(KERN_WARNING "pktgen: Unknown command: %s\n", data);
498
499 err = count;
500
501 out:
502 return err;
503 }
504
505 static int pgctrl_open(struct inode *inode, struct file *file)
506 {
507 return single_open(file, pgctrl_show, PDE(inode)->data);
508 }
509
510 static const struct file_operations pktgen_fops = {
511 .owner = THIS_MODULE,
512 .open = pgctrl_open,
513 .read = seq_read,
514 .llseek = seq_lseek,
515 .write = pgctrl_write,
516 .release = single_release,
517 };
518
519 static int pktgen_if_show(struct seq_file *seq, void *v)
520 {
521 const struct pktgen_dev *pkt_dev = seq->private;
522 ktime_t stopped;
523 u64 idle;
524
525 seq_printf(seq,
526 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
527 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
528 pkt_dev->max_pkt_size);
529
530 seq_printf(seq,
531 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
532 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
533 pkt_dev->clone_skb, pkt_dev->odevname);
534
535 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
536 pkt_dev->lflow);
537
538 seq_printf(seq,
539 " queue_map_min: %u queue_map_max: %u\n",
540 pkt_dev->queue_map_min,
541 pkt_dev->queue_map_max);
542
543 if (pkt_dev->flags & F_IPV6) {
544 char b1[128], b2[128], b3[128];
545 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
546 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
547 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
548 seq_printf(seq,
549 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
550 b2, b3);
551
552 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
553 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
554 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
555 seq_printf(seq,
556 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
557 b2, b3);
558
559 } else {
560 seq_printf(seq,
561 " dst_min: %s dst_max: %s\n",
562 pkt_dev->dst_min, pkt_dev->dst_max);
563 seq_printf(seq,
564 " src_min: %s src_max: %s\n",
565 pkt_dev->src_min, pkt_dev->src_max);
566 }
567
568 seq_puts(seq, " src_mac: ");
569
570 seq_printf(seq, "%pM ",
571 is_zero_ether_addr(pkt_dev->src_mac) ?
572 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
573
574 seq_printf(seq, "dst_mac: ");
575 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
576
577 seq_printf(seq,
578 " udp_src_min: %d udp_src_max: %d"
579 " udp_dst_min: %d udp_dst_max: %d\n",
580 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
581 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
582
583 seq_printf(seq,
584 " src_mac_count: %d dst_mac_count: %d\n",
585 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
586
587 if (pkt_dev->nr_labels) {
588 unsigned i;
589 seq_printf(seq, " mpls: ");
590 for (i = 0; i < pkt_dev->nr_labels; i++)
591 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
592 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
593 }
594
595 if (pkt_dev->vlan_id != 0xffff)
596 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
597 pkt_dev->vlan_id, pkt_dev->vlan_p,
598 pkt_dev->vlan_cfi);
599
600 if (pkt_dev->svlan_id != 0xffff)
601 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
602 pkt_dev->svlan_id, pkt_dev->svlan_p,
603 pkt_dev->svlan_cfi);
604
605 if (pkt_dev->tos)
606 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
607
608 if (pkt_dev->traffic_class)
609 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
610
611 seq_printf(seq, " Flags: ");
612
613 if (pkt_dev->flags & F_IPV6)
614 seq_printf(seq, "IPV6 ");
615
616 if (pkt_dev->flags & F_IPSRC_RND)
617 seq_printf(seq, "IPSRC_RND ");
618
619 if (pkt_dev->flags & F_IPDST_RND)
620 seq_printf(seq, "IPDST_RND ");
621
622 if (pkt_dev->flags & F_TXSIZE_RND)
623 seq_printf(seq, "TXSIZE_RND ");
624
625 if (pkt_dev->flags & F_UDPSRC_RND)
626 seq_printf(seq, "UDPSRC_RND ");
627
628 if (pkt_dev->flags & F_UDPDST_RND)
629 seq_printf(seq, "UDPDST_RND ");
630
631 if (pkt_dev->flags & F_MPLS_RND)
632 seq_printf(seq, "MPLS_RND ");
633
634 if (pkt_dev->flags & F_QUEUE_MAP_RND)
635 seq_printf(seq, "QUEUE_MAP_RND ");
636
637 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
638 seq_printf(seq, "QUEUE_MAP_CPU ");
639
640 if (pkt_dev->cflows) {
641 if (pkt_dev->flags & F_FLOW_SEQ)
642 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
643 else
644 seq_printf(seq, "FLOW_RND ");
645 }
646
647 #ifdef CONFIG_XFRM
648 if (pkt_dev->flags & F_IPSEC_ON)
649 seq_printf(seq, "IPSEC ");
650 #endif
651
652 if (pkt_dev->flags & F_MACSRC_RND)
653 seq_printf(seq, "MACSRC_RND ");
654
655 if (pkt_dev->flags & F_MACDST_RND)
656 seq_printf(seq, "MACDST_RND ");
657
658 if (pkt_dev->flags & F_VID_RND)
659 seq_printf(seq, "VID_RND ");
660
661 if (pkt_dev->flags & F_SVID_RND)
662 seq_printf(seq, "SVID_RND ");
663
664 seq_puts(seq, "\n");
665
666 /* not really stopped, more like last-running-at */
667 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at;
668 idle = pkt_dev->idle_acc;
669 do_div(idle, NSEC_PER_USEC);
670
671 seq_printf(seq,
672 "Current:\n pkts-sofar: %llu errors: %llu\n",
673 (unsigned long long)pkt_dev->sofar,
674 (unsigned long long)pkt_dev->errors);
675
676 seq_printf(seq,
677 " started: %lluus stopped: %lluus idle: %lluus\n",
678 (unsigned long long) ktime_to_us(pkt_dev->started_at),
679 (unsigned long long) ktime_to_us(stopped),
680 (unsigned long long) idle);
681
682 seq_printf(seq,
683 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
684 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
685 pkt_dev->cur_src_mac_offset);
686
687 if (pkt_dev->flags & F_IPV6) {
688 char b1[128], b2[128];
689 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
690 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
691 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
692 } else
693 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
694 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
695
696 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
697 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
698
699 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
700
701 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
702
703 if (pkt_dev->result[0])
704 seq_printf(seq, "Result: %s\n", pkt_dev->result);
705 else
706 seq_printf(seq, "Result: Idle\n");
707
708 return 0;
709 }
710
711
712 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
713 __u32 *num)
714 {
715 int i = 0;
716 *num = 0;
717
718 for (; i < maxlen; i++) {
719 char c;
720 *num <<= 4;
721 if (get_user(c, &user_buffer[i]))
722 return -EFAULT;
723 if ((c >= '0') && (c <= '9'))
724 *num |= c - '0';
725 else if ((c >= 'a') && (c <= 'f'))
726 *num |= c - 'a' + 10;
727 else if ((c >= 'A') && (c <= 'F'))
728 *num |= c - 'A' + 10;
729 else
730 break;
731 }
732 return i;
733 }
734
735 static int count_trail_chars(const char __user * user_buffer,
736 unsigned int maxlen)
737 {
738 int i;
739
740 for (i = 0; i < maxlen; i++) {
741 char c;
742 if (get_user(c, &user_buffer[i]))
743 return -EFAULT;
744 switch (c) {
745 case '\"':
746 case '\n':
747 case '\r':
748 case '\t':
749 case ' ':
750 case '=':
751 break;
752 default:
753 goto done;
754 }
755 }
756 done:
757 return i;
758 }
759
760 static unsigned long num_arg(const char __user * user_buffer,
761 unsigned long maxlen, unsigned long *num)
762 {
763 int i = 0;
764 *num = 0;
765
766 for (; i < maxlen; i++) {
767 char c;
768 if (get_user(c, &user_buffer[i]))
769 return -EFAULT;
770 if ((c >= '0') && (c <= '9')) {
771 *num *= 10;
772 *num += c - '0';
773 } else
774 break;
775 }
776 return i;
777 }
778
779 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
780 {
781 int i = 0;
782
783 for (; i < maxlen; i++) {
784 char c;
785 if (get_user(c, &user_buffer[i]))
786 return -EFAULT;
787 switch (c) {
788 case '\"':
789 case '\n':
790 case '\r':
791 case '\t':
792 case ' ':
793 goto done_str;
794 break;
795 default:
796 break;
797 }
798 }
799 done_str:
800 return i;
801 }
802
803 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
804 {
805 unsigned n = 0;
806 char c;
807 ssize_t i = 0;
808 int len;
809
810 pkt_dev->nr_labels = 0;
811 do {
812 __u32 tmp;
813 len = hex32_arg(&buffer[i], 8, &tmp);
814 if (len <= 0)
815 return len;
816 pkt_dev->labels[n] = htonl(tmp);
817 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
818 pkt_dev->flags |= F_MPLS_RND;
819 i += len;
820 if (get_user(c, &buffer[i]))
821 return -EFAULT;
822 i++;
823 n++;
824 if (n >= MAX_MPLS_LABELS)
825 return -E2BIG;
826 } while (c == ',');
827
828 pkt_dev->nr_labels = n;
829 return i;
830 }
831
832 static ssize_t pktgen_if_write(struct file *file,
833 const char __user * user_buffer, size_t count,
834 loff_t * offset)
835 {
836 struct seq_file *seq = (struct seq_file *)file->private_data;
837 struct pktgen_dev *pkt_dev = seq->private;
838 int i = 0, max, len;
839 char name[16], valstr[32];
840 unsigned long value = 0;
841 char *pg_result = NULL;
842 int tmp = 0;
843 char buf[128];
844
845 pg_result = &(pkt_dev->result[0]);
846
847 if (count < 1) {
848 printk(KERN_WARNING "pktgen: wrong command format\n");
849 return -EINVAL;
850 }
851
852 max = count - i;
853 tmp = count_trail_chars(&user_buffer[i], max);
854 if (tmp < 0) {
855 printk(KERN_WARNING "pktgen: illegal format\n");
856 return tmp;
857 }
858 i += tmp;
859
860 /* Read variable name */
861
862 len = strn_len(&user_buffer[i], sizeof(name) - 1);
863 if (len < 0)
864 return len;
865
866 memset(name, 0, sizeof(name));
867 if (copy_from_user(name, &user_buffer[i], len))
868 return -EFAULT;
869 i += len;
870
871 max = count - i;
872 len = count_trail_chars(&user_buffer[i], max);
873 if (len < 0)
874 return len;
875
876 i += len;
877
878 if (debug) {
879 char tb[count + 1];
880 if (copy_from_user(tb, user_buffer, count))
881 return -EFAULT;
882 tb[count] = 0;
883 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name,
884 (unsigned long)count, tb);
885 }
886
887 if (!strcmp(name, "min_pkt_size")) {
888 len = num_arg(&user_buffer[i], 10, &value);
889 if (len < 0)
890 return len;
891
892 i += len;
893 if (value < 14 + 20 + 8)
894 value = 14 + 20 + 8;
895 if (value != pkt_dev->min_pkt_size) {
896 pkt_dev->min_pkt_size = value;
897 pkt_dev->cur_pkt_size = value;
898 }
899 sprintf(pg_result, "OK: min_pkt_size=%u",
900 pkt_dev->min_pkt_size);
901 return count;
902 }
903
904 if (!strcmp(name, "max_pkt_size")) {
905 len = num_arg(&user_buffer[i], 10, &value);
906 if (len < 0)
907 return len;
908
909 i += len;
910 if (value < 14 + 20 + 8)
911 value = 14 + 20 + 8;
912 if (value != pkt_dev->max_pkt_size) {
913 pkt_dev->max_pkt_size = value;
914 pkt_dev->cur_pkt_size = value;
915 }
916 sprintf(pg_result, "OK: max_pkt_size=%u",
917 pkt_dev->max_pkt_size);
918 return count;
919 }
920
921 /* Shortcut for min = max */
922
923 if (!strcmp(name, "pkt_size")) {
924 len = num_arg(&user_buffer[i], 10, &value);
925 if (len < 0)
926 return len;
927
928 i += len;
929 if (value < 14 + 20 + 8)
930 value = 14 + 20 + 8;
931 if (value != pkt_dev->min_pkt_size) {
932 pkt_dev->min_pkt_size = value;
933 pkt_dev->max_pkt_size = value;
934 pkt_dev->cur_pkt_size = value;
935 }
936 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
937 return count;
938 }
939
940 if (!strcmp(name, "debug")) {
941 len = num_arg(&user_buffer[i], 10, &value);
942 if (len < 0)
943 return len;
944
945 i += len;
946 debug = value;
947 sprintf(pg_result, "OK: debug=%u", debug);
948 return count;
949 }
950
951 if (!strcmp(name, "frags")) {
952 len = num_arg(&user_buffer[i], 10, &value);
953 if (len < 0)
954 return len;
955
956 i += len;
957 pkt_dev->nfrags = value;
958 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
959 return count;
960 }
961 if (!strcmp(name, "delay")) {
962 len = num_arg(&user_buffer[i], 10, &value);
963 if (len < 0)
964 return len;
965
966 i += len;
967 if (value == 0x7FFFFFFF)
968 pkt_dev->delay = ULLONG_MAX;
969 else
970 pkt_dev->delay = (u64)value;
971
972 sprintf(pg_result, "OK: delay=%llu",
973 (unsigned long long) pkt_dev->delay);
974 return count;
975 }
976 if (!strcmp(name, "udp_src_min")) {
977 len = num_arg(&user_buffer[i], 10, &value);
978 if (len < 0)
979 return len;
980
981 i += len;
982 if (value != pkt_dev->udp_src_min) {
983 pkt_dev->udp_src_min = value;
984 pkt_dev->cur_udp_src = value;
985 }
986 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
987 return count;
988 }
989 if (!strcmp(name, "udp_dst_min")) {
990 len = num_arg(&user_buffer[i], 10, &value);
991 if (len < 0)
992 return len;
993
994 i += len;
995 if (value != pkt_dev->udp_dst_min) {
996 pkt_dev->udp_dst_min = value;
997 pkt_dev->cur_udp_dst = value;
998 }
999 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1000 return count;
1001 }
1002 if (!strcmp(name, "udp_src_max")) {
1003 len = num_arg(&user_buffer[i], 10, &value);
1004 if (len < 0)
1005 return len;
1006
1007 i += len;
1008 if (value != pkt_dev->udp_src_max) {
1009 pkt_dev->udp_src_max = value;
1010 pkt_dev->cur_udp_src = value;
1011 }
1012 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1013 return count;
1014 }
1015 if (!strcmp(name, "udp_dst_max")) {
1016 len = num_arg(&user_buffer[i], 10, &value);
1017 if (len < 0)
1018 return len;
1019
1020 i += len;
1021 if (value != pkt_dev->udp_dst_max) {
1022 pkt_dev->udp_dst_max = value;
1023 pkt_dev->cur_udp_dst = value;
1024 }
1025 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1026 return count;
1027 }
1028 if (!strcmp(name, "clone_skb")) {
1029 len = num_arg(&user_buffer[i], 10, &value);
1030 if (len < 0)
1031 return len;
1032
1033 i += len;
1034 pkt_dev->clone_skb = value;
1035
1036 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1037 return count;
1038 }
1039 if (!strcmp(name, "count")) {
1040 len = num_arg(&user_buffer[i], 10, &value);
1041 if (len < 0)
1042 return len;
1043
1044 i += len;
1045 pkt_dev->count = value;
1046 sprintf(pg_result, "OK: count=%llu",
1047 (unsigned long long)pkt_dev->count);
1048 return count;
1049 }
1050 if (!strcmp(name, "src_mac_count")) {
1051 len = num_arg(&user_buffer[i], 10, &value);
1052 if (len < 0)
1053 return len;
1054
1055 i += len;
1056 if (pkt_dev->src_mac_count != value) {
1057 pkt_dev->src_mac_count = value;
1058 pkt_dev->cur_src_mac_offset = 0;
1059 }
1060 sprintf(pg_result, "OK: src_mac_count=%d",
1061 pkt_dev->src_mac_count);
1062 return count;
1063 }
1064 if (!strcmp(name, "dst_mac_count")) {
1065 len = num_arg(&user_buffer[i], 10, &value);
1066 if (len < 0)
1067 return len;
1068
1069 i += len;
1070 if (pkt_dev->dst_mac_count != value) {
1071 pkt_dev->dst_mac_count = value;
1072 pkt_dev->cur_dst_mac_offset = 0;
1073 }
1074 sprintf(pg_result, "OK: dst_mac_count=%d",
1075 pkt_dev->dst_mac_count);
1076 return count;
1077 }
1078 if (!strcmp(name, "flag")) {
1079 char f[32];
1080 memset(f, 0, 32);
1081 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1082 if (len < 0)
1083 return len;
1084
1085 if (copy_from_user(f, &user_buffer[i], len))
1086 return -EFAULT;
1087 i += len;
1088 if (strcmp(f, "IPSRC_RND") == 0)
1089 pkt_dev->flags |= F_IPSRC_RND;
1090
1091 else if (strcmp(f, "!IPSRC_RND") == 0)
1092 pkt_dev->flags &= ~F_IPSRC_RND;
1093
1094 else if (strcmp(f, "TXSIZE_RND") == 0)
1095 pkt_dev->flags |= F_TXSIZE_RND;
1096
1097 else if (strcmp(f, "!TXSIZE_RND") == 0)
1098 pkt_dev->flags &= ~F_TXSIZE_RND;
1099
1100 else if (strcmp(f, "IPDST_RND") == 0)
1101 pkt_dev->flags |= F_IPDST_RND;
1102
1103 else if (strcmp(f, "!IPDST_RND") == 0)
1104 pkt_dev->flags &= ~F_IPDST_RND;
1105
1106 else if (strcmp(f, "UDPSRC_RND") == 0)
1107 pkt_dev->flags |= F_UDPSRC_RND;
1108
1109 else if (strcmp(f, "!UDPSRC_RND") == 0)
1110 pkt_dev->flags &= ~F_UDPSRC_RND;
1111
1112 else if (strcmp(f, "UDPDST_RND") == 0)
1113 pkt_dev->flags |= F_UDPDST_RND;
1114
1115 else if (strcmp(f, "!UDPDST_RND") == 0)
1116 pkt_dev->flags &= ~F_UDPDST_RND;
1117
1118 else if (strcmp(f, "MACSRC_RND") == 0)
1119 pkt_dev->flags |= F_MACSRC_RND;
1120
1121 else if (strcmp(f, "!MACSRC_RND") == 0)
1122 pkt_dev->flags &= ~F_MACSRC_RND;
1123
1124 else if (strcmp(f, "MACDST_RND") == 0)
1125 pkt_dev->flags |= F_MACDST_RND;
1126
1127 else if (strcmp(f, "!MACDST_RND") == 0)
1128 pkt_dev->flags &= ~F_MACDST_RND;
1129
1130 else if (strcmp(f, "MPLS_RND") == 0)
1131 pkt_dev->flags |= F_MPLS_RND;
1132
1133 else if (strcmp(f, "!MPLS_RND") == 0)
1134 pkt_dev->flags &= ~F_MPLS_RND;
1135
1136 else if (strcmp(f, "VID_RND") == 0)
1137 pkt_dev->flags |= F_VID_RND;
1138
1139 else if (strcmp(f, "!VID_RND") == 0)
1140 pkt_dev->flags &= ~F_VID_RND;
1141
1142 else if (strcmp(f, "SVID_RND") == 0)
1143 pkt_dev->flags |= F_SVID_RND;
1144
1145 else if (strcmp(f, "!SVID_RND") == 0)
1146 pkt_dev->flags &= ~F_SVID_RND;
1147
1148 else if (strcmp(f, "FLOW_SEQ") == 0)
1149 pkt_dev->flags |= F_FLOW_SEQ;
1150
1151 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1152 pkt_dev->flags |= F_QUEUE_MAP_RND;
1153
1154 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1155 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1156
1157 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1158 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1159
1160 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1161 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1162 #ifdef CONFIG_XFRM
1163 else if (strcmp(f, "IPSEC") == 0)
1164 pkt_dev->flags |= F_IPSEC_ON;
1165 #endif
1166
1167 else if (strcmp(f, "!IPV6") == 0)
1168 pkt_dev->flags &= ~F_IPV6;
1169
1170 else {
1171 sprintf(pg_result,
1172 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1173 f,
1174 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1175 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC\n");
1176 return count;
1177 }
1178 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1179 return count;
1180 }
1181 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1182 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1183 if (len < 0)
1184 return len;
1185
1186 if (copy_from_user(buf, &user_buffer[i], len))
1187 return -EFAULT;
1188 buf[len] = 0;
1189 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1190 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1191 strncpy(pkt_dev->dst_min, buf, len);
1192 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1193 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1194 }
1195 if (debug)
1196 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1197 pkt_dev->dst_min);
1198 i += len;
1199 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1200 return count;
1201 }
1202 if (!strcmp(name, "dst_max")) {
1203 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1204 if (len < 0)
1205 return len;
1206
1207
1208 if (copy_from_user(buf, &user_buffer[i], len))
1209 return -EFAULT;
1210
1211 buf[len] = 0;
1212 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1213 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1214 strncpy(pkt_dev->dst_max, buf, len);
1215 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1216 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1217 }
1218 if (debug)
1219 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1220 pkt_dev->dst_max);
1221 i += len;
1222 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1223 return count;
1224 }
1225 if (!strcmp(name, "dst6")) {
1226 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1227 if (len < 0)
1228 return len;
1229
1230 pkt_dev->flags |= F_IPV6;
1231
1232 if (copy_from_user(buf, &user_buffer[i], len))
1233 return -EFAULT;
1234 buf[len] = 0;
1235
1236 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1237 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1238
1239 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1240
1241 if (debug)
1242 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1243
1244 i += len;
1245 sprintf(pg_result, "OK: dst6=%s", buf);
1246 return count;
1247 }
1248 if (!strcmp(name, "dst6_min")) {
1249 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1250 if (len < 0)
1251 return len;
1252
1253 pkt_dev->flags |= F_IPV6;
1254
1255 if (copy_from_user(buf, &user_buffer[i], len))
1256 return -EFAULT;
1257 buf[len] = 0;
1258
1259 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1260 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1261
1262 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1263 &pkt_dev->min_in6_daddr);
1264 if (debug)
1265 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1266
1267 i += len;
1268 sprintf(pg_result, "OK: dst6_min=%s", buf);
1269 return count;
1270 }
1271 if (!strcmp(name, "dst6_max")) {
1272 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1273 if (len < 0)
1274 return len;
1275
1276 pkt_dev->flags |= F_IPV6;
1277
1278 if (copy_from_user(buf, &user_buffer[i], len))
1279 return -EFAULT;
1280 buf[len] = 0;
1281
1282 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1283 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1284
1285 if (debug)
1286 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1287
1288 i += len;
1289 sprintf(pg_result, "OK: dst6_max=%s", buf);
1290 return count;
1291 }
1292 if (!strcmp(name, "src6")) {
1293 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1294 if (len < 0)
1295 return len;
1296
1297 pkt_dev->flags |= F_IPV6;
1298
1299 if (copy_from_user(buf, &user_buffer[i], len))
1300 return -EFAULT;
1301 buf[len] = 0;
1302
1303 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1304 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1305
1306 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1307
1308 if (debug)
1309 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1310
1311 i += len;
1312 sprintf(pg_result, "OK: src6=%s", buf);
1313 return count;
1314 }
1315 if (!strcmp(name, "src_min")) {
1316 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1317 if (len < 0)
1318 return len;
1319
1320 if (copy_from_user(buf, &user_buffer[i], len))
1321 return -EFAULT;
1322 buf[len] = 0;
1323 if (strcmp(buf, pkt_dev->src_min) != 0) {
1324 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1325 strncpy(pkt_dev->src_min, buf, len);
1326 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1327 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1328 }
1329 if (debug)
1330 printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1331 pkt_dev->src_min);
1332 i += len;
1333 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1334 return count;
1335 }
1336 if (!strcmp(name, "src_max")) {
1337 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1338 if (len < 0)
1339 return len;
1340
1341 if (copy_from_user(buf, &user_buffer[i], len))
1342 return -EFAULT;
1343 buf[len] = 0;
1344 if (strcmp(buf, pkt_dev->src_max) != 0) {
1345 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1346 strncpy(pkt_dev->src_max, buf, len);
1347 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1348 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1349 }
1350 if (debug)
1351 printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1352 pkt_dev->src_max);
1353 i += len;
1354 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1355 return count;
1356 }
1357 if (!strcmp(name, "dst_mac")) {
1358 char *v = valstr;
1359 unsigned char old_dmac[ETH_ALEN];
1360 unsigned char *m = pkt_dev->dst_mac;
1361 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1362
1363 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1364 if (len < 0)
1365 return len;
1366
1367 memset(valstr, 0, sizeof(valstr));
1368 if (copy_from_user(valstr, &user_buffer[i], len))
1369 return -EFAULT;
1370 i += len;
1371
1372 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1373 if (*v >= '0' && *v <= '9') {
1374 *m *= 16;
1375 *m += *v - '0';
1376 }
1377 if (*v >= 'A' && *v <= 'F') {
1378 *m *= 16;
1379 *m += *v - 'A' + 10;
1380 }
1381 if (*v >= 'a' && *v <= 'f') {
1382 *m *= 16;
1383 *m += *v - 'a' + 10;
1384 }
1385 if (*v == ':') {
1386 m++;
1387 *m = 0;
1388 }
1389 }
1390
1391 /* Set up Dest MAC */
1392 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1393 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1394
1395 sprintf(pg_result, "OK: dstmac");
1396 return count;
1397 }
1398 if (!strcmp(name, "src_mac")) {
1399 char *v = valstr;
1400 unsigned char old_smac[ETH_ALEN];
1401 unsigned char *m = pkt_dev->src_mac;
1402
1403 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN);
1404
1405 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1406 if (len < 0)
1407 return len;
1408
1409 memset(valstr, 0, sizeof(valstr));
1410 if (copy_from_user(valstr, &user_buffer[i], len))
1411 return -EFAULT;
1412 i += len;
1413
1414 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1415 if (*v >= '0' && *v <= '9') {
1416 *m *= 16;
1417 *m += *v - '0';
1418 }
1419 if (*v >= 'A' && *v <= 'F') {
1420 *m *= 16;
1421 *m += *v - 'A' + 10;
1422 }
1423 if (*v >= 'a' && *v <= 'f') {
1424 *m *= 16;
1425 *m += *v - 'a' + 10;
1426 }
1427 if (*v == ':') {
1428 m++;
1429 *m = 0;
1430 }
1431 }
1432
1433 /* Set up Src MAC */
1434 if (compare_ether_addr(old_smac, pkt_dev->src_mac))
1435 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN);
1436
1437 sprintf(pg_result, "OK: srcmac");
1438 return count;
1439 }
1440
1441 if (!strcmp(name, "clear_counters")) {
1442 pktgen_clear_counters(pkt_dev);
1443 sprintf(pg_result, "OK: Clearing counters.\n");
1444 return count;
1445 }
1446
1447 if (!strcmp(name, "flows")) {
1448 len = num_arg(&user_buffer[i], 10, &value);
1449 if (len < 0)
1450 return len;
1451
1452 i += len;
1453 if (value > MAX_CFLOWS)
1454 value = MAX_CFLOWS;
1455
1456 pkt_dev->cflows = value;
1457 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1458 return count;
1459 }
1460
1461 if (!strcmp(name, "flowlen")) {
1462 len = num_arg(&user_buffer[i], 10, &value);
1463 if (len < 0)
1464 return len;
1465
1466 i += len;
1467 pkt_dev->lflow = value;
1468 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1469 return count;
1470 }
1471
1472 if (!strcmp(name, "queue_map_min")) {
1473 len = num_arg(&user_buffer[i], 5, &value);
1474 if (len < 0)
1475 return len;
1476
1477 i += len;
1478 pkt_dev->queue_map_min = value;
1479 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1480 return count;
1481 }
1482
1483 if (!strcmp(name, "queue_map_max")) {
1484 len = num_arg(&user_buffer[i], 5, &value);
1485 if (len < 0)
1486 return len;
1487
1488 i += len;
1489 pkt_dev->queue_map_max = value;
1490 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1491 return count;
1492 }
1493
1494 if (!strcmp(name, "mpls")) {
1495 unsigned n, cnt;
1496
1497 len = get_labels(&user_buffer[i], pkt_dev);
1498 if (len < 0)
1499 return len;
1500 i += len;
1501 cnt = sprintf(pg_result, "OK: mpls=");
1502 for (n = 0; n < pkt_dev->nr_labels; n++)
1503 cnt += sprintf(pg_result + cnt,
1504 "%08x%s", ntohl(pkt_dev->labels[n]),
1505 n == pkt_dev->nr_labels-1 ? "" : ",");
1506
1507 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1508 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1509 pkt_dev->svlan_id = 0xffff;
1510
1511 if (debug)
1512 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1513 }
1514 return count;
1515 }
1516
1517 if (!strcmp(name, "vlan_id")) {
1518 len = num_arg(&user_buffer[i], 4, &value);
1519 if (len < 0)
1520 return len;
1521
1522 i += len;
1523 if (value <= 4095) {
1524 pkt_dev->vlan_id = value; /* turn on VLAN */
1525
1526 if (debug)
1527 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1528
1529 if (debug && pkt_dev->nr_labels)
1530 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1531
1532 pkt_dev->nr_labels = 0; /* turn off MPLS */
1533 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1534 } else {
1535 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1536 pkt_dev->svlan_id = 0xffff;
1537
1538 if (debug)
1539 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1540 }
1541 return count;
1542 }
1543
1544 if (!strcmp(name, "vlan_p")) {
1545 len = num_arg(&user_buffer[i], 1, &value);
1546 if (len < 0)
1547 return len;
1548
1549 i += len;
1550 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1551 pkt_dev->vlan_p = value;
1552 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1553 } else {
1554 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1555 }
1556 return count;
1557 }
1558
1559 if (!strcmp(name, "vlan_cfi")) {
1560 len = num_arg(&user_buffer[i], 1, &value);
1561 if (len < 0)
1562 return len;
1563
1564 i += len;
1565 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1566 pkt_dev->vlan_cfi = value;
1567 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1568 } else {
1569 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1570 }
1571 return count;
1572 }
1573
1574 if (!strcmp(name, "svlan_id")) {
1575 len = num_arg(&user_buffer[i], 4, &value);
1576 if (len < 0)
1577 return len;
1578
1579 i += len;
1580 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1581 pkt_dev->svlan_id = value; /* turn on SVLAN */
1582
1583 if (debug)
1584 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1585
1586 if (debug && pkt_dev->nr_labels)
1587 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1588
1589 pkt_dev->nr_labels = 0; /* turn off MPLS */
1590 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1591 } else {
1592 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1593 pkt_dev->svlan_id = 0xffff;
1594
1595 if (debug)
1596 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1597 }
1598 return count;
1599 }
1600
1601 if (!strcmp(name, "svlan_p")) {
1602 len = num_arg(&user_buffer[i], 1, &value);
1603 if (len < 0)
1604 return len;
1605
1606 i += len;
1607 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1608 pkt_dev->svlan_p = value;
1609 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1610 } else {
1611 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1612 }
1613 return count;
1614 }
1615
1616 if (!strcmp(name, "svlan_cfi")) {
1617 len = num_arg(&user_buffer[i], 1, &value);
1618 if (len < 0)
1619 return len;
1620
1621 i += len;
1622 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1623 pkt_dev->svlan_cfi = value;
1624 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1625 } else {
1626 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1627 }
1628 return count;
1629 }
1630
1631 if (!strcmp(name, "tos")) {
1632 __u32 tmp_value = 0;
1633 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1634 if (len < 0)
1635 return len;
1636
1637 i += len;
1638 if (len == 2) {
1639 pkt_dev->tos = tmp_value;
1640 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1641 } else {
1642 sprintf(pg_result, "ERROR: tos must be 00-ff");
1643 }
1644 return count;
1645 }
1646
1647 if (!strcmp(name, "traffic_class")) {
1648 __u32 tmp_value = 0;
1649 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1650 if (len < 0)
1651 return len;
1652
1653 i += len;
1654 if (len == 2) {
1655 pkt_dev->traffic_class = tmp_value;
1656 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1657 } else {
1658 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1659 }
1660 return count;
1661 }
1662
1663 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1664 return -EINVAL;
1665 }
1666
1667 static int pktgen_if_open(struct inode *inode, struct file *file)
1668 {
1669 return single_open(file, pktgen_if_show, PDE(inode)->data);
1670 }
1671
1672 static const struct file_operations pktgen_if_fops = {
1673 .owner = THIS_MODULE,
1674 .open = pktgen_if_open,
1675 .read = seq_read,
1676 .llseek = seq_lseek,
1677 .write = pktgen_if_write,
1678 .release = single_release,
1679 };
1680
1681 static int pktgen_thread_show(struct seq_file *seq, void *v)
1682 {
1683 struct pktgen_thread *t = seq->private;
1684 const struct pktgen_dev *pkt_dev;
1685
1686 BUG_ON(!t);
1687
1688 seq_printf(seq, "Running: ");
1689
1690 if_lock(t);
1691 list_for_each_entry(pkt_dev, &t->if_list, list)
1692 if (pkt_dev->running)
1693 seq_printf(seq, "%s ", pkt_dev->odevname);
1694
1695 seq_printf(seq, "\nStopped: ");
1696
1697 list_for_each_entry(pkt_dev, &t->if_list, list)
1698 if (!pkt_dev->running)
1699 seq_printf(seq, "%s ", pkt_dev->odevname);
1700
1701 if (t->result[0])
1702 seq_printf(seq, "\nResult: %s\n", t->result);
1703 else
1704 seq_printf(seq, "\nResult: NA\n");
1705
1706 if_unlock(t);
1707
1708 return 0;
1709 }
1710
1711 static ssize_t pktgen_thread_write(struct file *file,
1712 const char __user * user_buffer,
1713 size_t count, loff_t * offset)
1714 {
1715 struct seq_file *seq = (struct seq_file *)file->private_data;
1716 struct pktgen_thread *t = seq->private;
1717 int i = 0, max, len, ret;
1718 char name[40];
1719 char *pg_result;
1720
1721 if (count < 1) {
1722 // sprintf(pg_result, "Wrong command format");
1723 return -EINVAL;
1724 }
1725
1726 max = count - i;
1727 len = count_trail_chars(&user_buffer[i], max);
1728 if (len < 0)
1729 return len;
1730
1731 i += len;
1732
1733 /* Read variable name */
1734
1735 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1736 if (len < 0)
1737 return len;
1738
1739 memset(name, 0, sizeof(name));
1740 if (copy_from_user(name, &user_buffer[i], len))
1741 return -EFAULT;
1742 i += len;
1743
1744 max = count - i;
1745 len = count_trail_chars(&user_buffer[i], max);
1746 if (len < 0)
1747 return len;
1748
1749 i += len;
1750
1751 if (debug)
1752 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1753 name, (unsigned long)count);
1754
1755 if (!t) {
1756 printk(KERN_ERR "pktgen: ERROR: No thread\n");
1757 ret = -EINVAL;
1758 goto out;
1759 }
1760
1761 pg_result = &(t->result[0]);
1762
1763 if (!strcmp(name, "add_device")) {
1764 char f[32];
1765 memset(f, 0, 32);
1766 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1767 if (len < 0) {
1768 ret = len;
1769 goto out;
1770 }
1771 if (copy_from_user(f, &user_buffer[i], len))
1772 return -EFAULT;
1773 i += len;
1774 mutex_lock(&pktgen_thread_lock);
1775 pktgen_add_device(t, f);
1776 mutex_unlock(&pktgen_thread_lock);
1777 ret = count;
1778 sprintf(pg_result, "OK: add_device=%s", f);
1779 goto out;
1780 }
1781
1782 if (!strcmp(name, "rem_device_all")) {
1783 mutex_lock(&pktgen_thread_lock);
1784 t->control |= T_REMDEVALL;
1785 mutex_unlock(&pktgen_thread_lock);
1786 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1787 ret = count;
1788 sprintf(pg_result, "OK: rem_device_all");
1789 goto out;
1790 }
1791
1792 if (!strcmp(name, "max_before_softirq")) {
1793 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1794 ret = count;
1795 goto out;
1796 }
1797
1798 ret = -EINVAL;
1799 out:
1800 return ret;
1801 }
1802
1803 static int pktgen_thread_open(struct inode *inode, struct file *file)
1804 {
1805 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1806 }
1807
1808 static const struct file_operations pktgen_thread_fops = {
1809 .owner = THIS_MODULE,
1810 .open = pktgen_thread_open,
1811 .read = seq_read,
1812 .llseek = seq_lseek,
1813 .write = pktgen_thread_write,
1814 .release = single_release,
1815 };
1816
1817 /* Think find or remove for NN */
1818 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1819 {
1820 struct pktgen_thread *t;
1821 struct pktgen_dev *pkt_dev = NULL;
1822 bool exact = (remove == FIND);
1823
1824 list_for_each_entry(t, &pktgen_threads, th_list) {
1825 pkt_dev = pktgen_find_dev(t, ifname, exact);
1826 if (pkt_dev) {
1827 if (remove) {
1828 if_lock(t);
1829 pkt_dev->removal_mark = 1;
1830 t->control |= T_REMDEV;
1831 if_unlock(t);
1832 }
1833 break;
1834 }
1835 }
1836 return pkt_dev;
1837 }
1838
1839 /*
1840 * mark a device for removal
1841 */
1842 static void pktgen_mark_device(const char *ifname)
1843 {
1844 struct pktgen_dev *pkt_dev = NULL;
1845 const int max_tries = 10, msec_per_try = 125;
1846 int i = 0;
1847
1848 mutex_lock(&pktgen_thread_lock);
1849 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname);
1850
1851 while (1) {
1852
1853 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1854 if (pkt_dev == NULL)
1855 break; /* success */
1856
1857 mutex_unlock(&pktgen_thread_lock);
1858 pr_debug("pktgen: pktgen_mark_device waiting for %s "
1859 "to disappear....\n", ifname);
1860 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1861 mutex_lock(&pktgen_thread_lock);
1862
1863 if (++i >= max_tries) {
1864 printk(KERN_ERR "pktgen_mark_device: timed out after "
1865 "waiting %d msec for device %s to be removed\n",
1866 msec_per_try * i, ifname);
1867 break;
1868 }
1869
1870 }
1871
1872 mutex_unlock(&pktgen_thread_lock);
1873 }
1874
1875 static void pktgen_change_name(struct net_device *dev)
1876 {
1877 struct pktgen_thread *t;
1878
1879 list_for_each_entry(t, &pktgen_threads, th_list) {
1880 struct pktgen_dev *pkt_dev;
1881
1882 list_for_each_entry(pkt_dev, &t->if_list, list) {
1883 if (pkt_dev->odev != dev)
1884 continue;
1885
1886 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1887
1888 pkt_dev->entry = proc_create_data(dev->name, 0600,
1889 pg_proc_dir,
1890 &pktgen_if_fops,
1891 pkt_dev);
1892 if (!pkt_dev->entry)
1893 printk(KERN_ERR "pktgen: can't move proc "
1894 " entry for '%s'\n", dev->name);
1895 break;
1896 }
1897 }
1898 }
1899
1900 static int pktgen_device_event(struct notifier_block *unused,
1901 unsigned long event, void *ptr)
1902 {
1903 struct net_device *dev = ptr;
1904
1905 if (!net_eq(dev_net(dev), &init_net))
1906 return NOTIFY_DONE;
1907
1908 /* It is OK that we do not hold the group lock right now,
1909 * as we run under the RTNL lock.
1910 */
1911
1912 switch (event) {
1913 case NETDEV_CHANGENAME:
1914 pktgen_change_name(dev);
1915 break;
1916
1917 case NETDEV_UNREGISTER:
1918 pktgen_mark_device(dev->name);
1919 break;
1920 }
1921
1922 return NOTIFY_DONE;
1923 }
1924
1925 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev,
1926 const char *ifname)
1927 {
1928 char b[IFNAMSIZ+5];
1929 int i = 0;
1930
1931 for (i = 0; ifname[i] != '@'; i++) {
1932 if (i == IFNAMSIZ)
1933 break;
1934
1935 b[i] = ifname[i];
1936 }
1937 b[i] = 0;
1938
1939 return dev_get_by_name(&init_net, b);
1940 }
1941
1942
1943 /* Associate pktgen_dev with a device. */
1944
1945 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1946 {
1947 struct net_device *odev;
1948 int err;
1949
1950 /* Clean old setups */
1951 if (pkt_dev->odev) {
1952 dev_put(pkt_dev->odev);
1953 pkt_dev->odev = NULL;
1954 }
1955
1956 odev = pktgen_dev_get_by_name(pkt_dev, ifname);
1957 if (!odev) {
1958 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname);
1959 return -ENODEV;
1960 }
1961
1962 if (odev->type != ARPHRD_ETHER) {
1963 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname);
1964 err = -EINVAL;
1965 } else if (!netif_running(odev)) {
1966 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname);
1967 err = -ENETDOWN;
1968 } else {
1969 pkt_dev->odev = odev;
1970 return 0;
1971 }
1972
1973 dev_put(odev);
1974 return err;
1975 }
1976
1977 /* Read pkt_dev from the interface and set up internal pktgen_dev
1978 * structure to have the right information to create/send packets
1979 */
1980 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
1981 {
1982 int ntxq;
1983
1984 if (!pkt_dev->odev) {
1985 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in "
1986 "setup_inject.\n");
1987 sprintf(pkt_dev->result,
1988 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1989 return;
1990 }
1991
1992 /* make sure that we don't pick a non-existing transmit queue */
1993 ntxq = pkt_dev->odev->real_num_tx_queues;
1994
1995 if (ntxq <= pkt_dev->queue_map_min) {
1996 printk(KERN_WARNING "pktgen: WARNING: Requested "
1997 "queue_map_min (zero-based) (%d) exceeds valid range "
1998 "[0 - %d] for (%d) queues on %s, resetting\n",
1999 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2000 pkt_dev->odevname);
2001 pkt_dev->queue_map_min = ntxq - 1;
2002 }
2003 if (pkt_dev->queue_map_max >= ntxq) {
2004 printk(KERN_WARNING "pktgen: WARNING: Requested "
2005 "queue_map_max (zero-based) (%d) exceeds valid range "
2006 "[0 - %d] for (%d) queues on %s, resetting\n",
2007 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2008 pkt_dev->odevname);
2009 pkt_dev->queue_map_max = ntxq - 1;
2010 }
2011
2012 /* Default to the interface's mac if not explicitly set. */
2013
2014 if (is_zero_ether_addr(pkt_dev->src_mac))
2015 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2016
2017 /* Set up Dest MAC */
2018 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2019
2020 /* Set up pkt size */
2021 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2022
2023 if (pkt_dev->flags & F_IPV6) {
2024 /*
2025 * Skip this automatic address setting until locks or functions
2026 * gets exported
2027 */
2028
2029 #ifdef NOTNOW
2030 int i, set = 0, err = 1;
2031 struct inet6_dev *idev;
2032
2033 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2034 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2035 set = 1;
2036 break;
2037 }
2038
2039 if (!set) {
2040
2041 /*
2042 * Use linklevel address if unconfigured.
2043 *
2044 * use ipv6_get_lladdr if/when it's get exported
2045 */
2046
2047 rcu_read_lock();
2048 idev = __in6_dev_get(pkt_dev->odev);
2049 if (idev) {
2050 struct inet6_ifaddr *ifp;
2051
2052 read_lock_bh(&idev->lock);
2053 for (ifp = idev->addr_list; ifp;
2054 ifp = ifp->if_next) {
2055 if (ifp->scope == IFA_LINK &&
2056 !(ifp->flags & IFA_F_TENTATIVE)) {
2057 ipv6_addr_copy(&pkt_dev->
2058 cur_in6_saddr,
2059 &ifp->addr);
2060 err = 0;
2061 break;
2062 }
2063 }
2064 read_unlock_bh(&idev->lock);
2065 }
2066 rcu_read_unlock();
2067 if (err)
2068 printk(KERN_ERR "pktgen: ERROR: IPv6 link "
2069 "address not availble.\n");
2070 }
2071 #endif
2072 } else {
2073 pkt_dev->saddr_min = 0;
2074 pkt_dev->saddr_max = 0;
2075 if (strlen(pkt_dev->src_min) == 0) {
2076
2077 struct in_device *in_dev;
2078
2079 rcu_read_lock();
2080 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2081 if (in_dev) {
2082 if (in_dev->ifa_list) {
2083 pkt_dev->saddr_min =
2084 in_dev->ifa_list->ifa_address;
2085 pkt_dev->saddr_max = pkt_dev->saddr_min;
2086 }
2087 }
2088 rcu_read_unlock();
2089 } else {
2090 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2091 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2092 }
2093
2094 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2095 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2096 }
2097 /* Initialize current values. */
2098 pkt_dev->cur_dst_mac_offset = 0;
2099 pkt_dev->cur_src_mac_offset = 0;
2100 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2101 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2102 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2103 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2104 pkt_dev->nflows = 0;
2105 }
2106
2107
2108 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2109 {
2110 ktime_t start_time, end_time;
2111 s64 remaining;
2112 struct hrtimer_sleeper t;
2113
2114 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2115 hrtimer_set_expires(&t.timer, spin_until);
2116
2117 remaining = ktime_to_us(hrtimer_expires_remaining(&t.timer));
2118 if (remaining <= 0) {
2119 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2120 return;
2121 }
2122
2123 start_time = ktime_now();
2124 if (remaining < 100)
2125 udelay(remaining); /* really small just spin */
2126 else {
2127 /* see do_nanosleep */
2128 hrtimer_init_sleeper(&t, current);
2129 do {
2130 set_current_state(TASK_INTERRUPTIBLE);
2131 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2132 if (!hrtimer_active(&t.timer))
2133 t.task = NULL;
2134
2135 if (likely(t.task))
2136 schedule();
2137
2138 hrtimer_cancel(&t.timer);
2139 } while (t.task && pkt_dev->running && !signal_pending(current));
2140 __set_current_state(TASK_RUNNING);
2141 }
2142 end_time = ktime_now();
2143
2144 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2145 pkt_dev->next_tx = ktime_add_ns(end_time, pkt_dev->delay);
2146 }
2147
2148 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2149 {
2150 pkt_dev->pkt_overhead = 0;
2151 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2152 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2153 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2154 }
2155
2156 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2157 {
2158 return !!(pkt_dev->flows[flow].flags & F_INIT);
2159 }
2160
2161 static inline int f_pick(struct pktgen_dev *pkt_dev)
2162 {
2163 int flow = pkt_dev->curfl;
2164
2165 if (pkt_dev->flags & F_FLOW_SEQ) {
2166 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2167 /* reset time */
2168 pkt_dev->flows[flow].count = 0;
2169 pkt_dev->flows[flow].flags = 0;
2170 pkt_dev->curfl += 1;
2171 if (pkt_dev->curfl >= pkt_dev->cflows)
2172 pkt_dev->curfl = 0; /*reset */
2173 }
2174 } else {
2175 flow = random32() % pkt_dev->cflows;
2176 pkt_dev->curfl = flow;
2177
2178 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2179 pkt_dev->flows[flow].count = 0;
2180 pkt_dev->flows[flow].flags = 0;
2181 }
2182 }
2183
2184 return pkt_dev->curfl;
2185 }
2186
2187
2188 #ifdef CONFIG_XFRM
2189 /* If there was already an IPSEC SA, we keep it as is, else
2190 * we go look for it ...
2191 */
2192 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2193 {
2194 struct xfrm_state *x = pkt_dev->flows[flow].x;
2195 if (!x) {
2196 /*slow path: we dont already have xfrm_state*/
2197 x = xfrm_stateonly_find(&init_net,
2198 (xfrm_address_t *)&pkt_dev->cur_daddr,
2199 (xfrm_address_t *)&pkt_dev->cur_saddr,
2200 AF_INET,
2201 pkt_dev->ipsmode,
2202 pkt_dev->ipsproto, 0);
2203 if (x) {
2204 pkt_dev->flows[flow].x = x;
2205 set_pkt_overhead(pkt_dev);
2206 pkt_dev->pkt_overhead += x->props.header_len;
2207 }
2208
2209 }
2210 }
2211 #endif
2212 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2213 {
2214
2215 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2216 pkt_dev->cur_queue_map = smp_processor_id();
2217
2218 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2219 __u16 t;
2220 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2221 t = random32() %
2222 (pkt_dev->queue_map_max -
2223 pkt_dev->queue_map_min + 1)
2224 + pkt_dev->queue_map_min;
2225 } else {
2226 t = pkt_dev->cur_queue_map + 1;
2227 if (t > pkt_dev->queue_map_max)
2228 t = pkt_dev->queue_map_min;
2229 }
2230 pkt_dev->cur_queue_map = t;
2231 }
2232 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2233 }
2234
2235 /* Increment/randomize headers according to flags and current values
2236 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2237 */
2238 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2239 {
2240 __u32 imn;
2241 __u32 imx;
2242 int flow = 0;
2243
2244 if (pkt_dev->cflows)
2245 flow = f_pick(pkt_dev);
2246
2247 /* Deal with source MAC */
2248 if (pkt_dev->src_mac_count > 1) {
2249 __u32 mc;
2250 __u32 tmp;
2251
2252 if (pkt_dev->flags & F_MACSRC_RND)
2253 mc = random32() % pkt_dev->src_mac_count;
2254 else {
2255 mc = pkt_dev->cur_src_mac_offset++;
2256 if (pkt_dev->cur_src_mac_offset >=
2257 pkt_dev->src_mac_count)
2258 pkt_dev->cur_src_mac_offset = 0;
2259 }
2260
2261 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2262 pkt_dev->hh[11] = tmp;
2263 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2264 pkt_dev->hh[10] = tmp;
2265 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2266 pkt_dev->hh[9] = tmp;
2267 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2268 pkt_dev->hh[8] = tmp;
2269 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2270 pkt_dev->hh[7] = tmp;
2271 }
2272
2273 /* Deal with Destination MAC */
2274 if (pkt_dev->dst_mac_count > 1) {
2275 __u32 mc;
2276 __u32 tmp;
2277
2278 if (pkt_dev->flags & F_MACDST_RND)
2279 mc = random32() % pkt_dev->dst_mac_count;
2280
2281 else {
2282 mc = pkt_dev->cur_dst_mac_offset++;
2283 if (pkt_dev->cur_dst_mac_offset >=
2284 pkt_dev->dst_mac_count) {
2285 pkt_dev->cur_dst_mac_offset = 0;
2286 }
2287 }
2288
2289 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2290 pkt_dev->hh[5] = tmp;
2291 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2292 pkt_dev->hh[4] = tmp;
2293 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2294 pkt_dev->hh[3] = tmp;
2295 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2296 pkt_dev->hh[2] = tmp;
2297 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2298 pkt_dev->hh[1] = tmp;
2299 }
2300
2301 if (pkt_dev->flags & F_MPLS_RND) {
2302 unsigned i;
2303 for (i = 0; i < pkt_dev->nr_labels; i++)
2304 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2305 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2306 ((__force __be32)random32() &
2307 htonl(0x000fffff));
2308 }
2309
2310 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2311 pkt_dev->vlan_id = random32() & (4096-1);
2312 }
2313
2314 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2315 pkt_dev->svlan_id = random32() & (4096 - 1);
2316 }
2317
2318 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2319 if (pkt_dev->flags & F_UDPSRC_RND)
2320 pkt_dev->cur_udp_src = random32() %
2321 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2322 + pkt_dev->udp_src_min;
2323
2324 else {
2325 pkt_dev->cur_udp_src++;
2326 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2327 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2328 }
2329 }
2330
2331 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2332 if (pkt_dev->flags & F_UDPDST_RND) {
2333 pkt_dev->cur_udp_dst = random32() %
2334 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2335 + pkt_dev->udp_dst_min;
2336 } else {
2337 pkt_dev->cur_udp_dst++;
2338 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2339 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2340 }
2341 }
2342
2343 if (!(pkt_dev->flags & F_IPV6)) {
2344
2345 imn = ntohl(pkt_dev->saddr_min);
2346 imx = ntohl(pkt_dev->saddr_max);
2347 if (imn < imx) {
2348 __u32 t;
2349 if (pkt_dev->flags & F_IPSRC_RND)
2350 t = random32() % (imx - imn) + imn;
2351 else {
2352 t = ntohl(pkt_dev->cur_saddr);
2353 t++;
2354 if (t > imx)
2355 t = imn;
2356
2357 }
2358 pkt_dev->cur_saddr = htonl(t);
2359 }
2360
2361 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2362 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2363 } else {
2364 imn = ntohl(pkt_dev->daddr_min);
2365 imx = ntohl(pkt_dev->daddr_max);
2366 if (imn < imx) {
2367 __u32 t;
2368 __be32 s;
2369 if (pkt_dev->flags & F_IPDST_RND) {
2370
2371 t = random32() % (imx - imn) + imn;
2372 s = htonl(t);
2373
2374 while (ipv4_is_loopback(s) ||
2375 ipv4_is_multicast(s) ||
2376 ipv4_is_lbcast(s) ||
2377 ipv4_is_zeronet(s) ||
2378 ipv4_is_local_multicast(s)) {
2379 t = random32() % (imx - imn) + imn;
2380 s = htonl(t);
2381 }
2382 pkt_dev->cur_daddr = s;
2383 } else {
2384 t = ntohl(pkt_dev->cur_daddr);
2385 t++;
2386 if (t > imx) {
2387 t = imn;
2388 }
2389 pkt_dev->cur_daddr = htonl(t);
2390 }
2391 }
2392 if (pkt_dev->cflows) {
2393 pkt_dev->flows[flow].flags |= F_INIT;
2394 pkt_dev->flows[flow].cur_daddr =
2395 pkt_dev->cur_daddr;
2396 #ifdef CONFIG_XFRM
2397 if (pkt_dev->flags & F_IPSEC_ON)
2398 get_ipsec_sa(pkt_dev, flow);
2399 #endif
2400 pkt_dev->nflows++;
2401 }
2402 }
2403 } else { /* IPV6 * */
2404
2405 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2406 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2407 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2408 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2409 else {
2410 int i;
2411
2412 /* Only random destinations yet */
2413
2414 for (i = 0; i < 4; i++) {
2415 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2416 (((__force __be32)random32() |
2417 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2418 pkt_dev->max_in6_daddr.s6_addr32[i]);
2419 }
2420 }
2421 }
2422
2423 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2424 __u32 t;
2425 if (pkt_dev->flags & F_TXSIZE_RND) {
2426 t = random32() %
2427 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2428 + pkt_dev->min_pkt_size;
2429 } else {
2430 t = pkt_dev->cur_pkt_size + 1;
2431 if (t > pkt_dev->max_pkt_size)
2432 t = pkt_dev->min_pkt_size;
2433 }
2434 pkt_dev->cur_pkt_size = t;
2435 }
2436
2437 set_cur_queue_map(pkt_dev);
2438
2439 pkt_dev->flows[flow].count++;
2440 }
2441
2442
2443 #ifdef CONFIG_XFRM
2444 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2445 {
2446 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2447 int err = 0;
2448 struct iphdr *iph;
2449
2450 if (!x)
2451 return 0;
2452 /* XXX: we dont support tunnel mode for now until
2453 * we resolve the dst issue */
2454 if (x->props.mode != XFRM_MODE_TRANSPORT)
2455 return 0;
2456
2457 spin_lock(&x->lock);
2458 iph = ip_hdr(skb);
2459
2460 err = x->outer_mode->output(x, skb);
2461 if (err)
2462 goto error;
2463 err = x->type->output(x, skb);
2464 if (err)
2465 goto error;
2466
2467 x->curlft.bytes += skb->len;
2468 x->curlft.packets++;
2469 error:
2470 spin_unlock(&x->lock);
2471 return err;
2472 }
2473
2474 static void free_SAs(struct pktgen_dev *pkt_dev)
2475 {
2476 if (pkt_dev->cflows) {
2477 /* let go of the SAs if we have them */
2478 int i = 0;
2479 for (; i < pkt_dev->cflows; i++) {
2480 struct xfrm_state *x = pkt_dev->flows[i].x;
2481 if (x) {
2482 xfrm_state_put(x);
2483 pkt_dev->flows[i].x = NULL;
2484 }
2485 }
2486 }
2487 }
2488
2489 static int process_ipsec(struct pktgen_dev *pkt_dev,
2490 struct sk_buff *skb, __be16 protocol)
2491 {
2492 if (pkt_dev->flags & F_IPSEC_ON) {
2493 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2494 int nhead = 0;
2495 if (x) {
2496 int ret;
2497 __u8 *eth;
2498 nhead = x->props.header_len - skb_headroom(skb);
2499 if (nhead > 0) {
2500 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2501 if (ret < 0) {
2502 printk(KERN_ERR "Error expanding "
2503 "ipsec packet %d\n", ret);
2504 goto err;
2505 }
2506 }
2507
2508 /* ipsec is not expecting ll header */
2509 skb_pull(skb, ETH_HLEN);
2510 ret = pktgen_output_ipsec(skb, pkt_dev);
2511 if (ret) {
2512 printk(KERN_ERR "Error creating ipsec "
2513 "packet %d\n", ret);
2514 goto err;
2515 }
2516 /* restore ll */
2517 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2518 memcpy(eth, pkt_dev->hh, 12);
2519 *(u16 *) &eth[12] = protocol;
2520 }
2521 }
2522 return 1;
2523 err:
2524 kfree_skb(skb);
2525 return 0;
2526 }
2527 #endif
2528
2529 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2530 {
2531 unsigned i;
2532 for (i = 0; i < pkt_dev->nr_labels; i++)
2533 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2534
2535 mpls--;
2536 *mpls |= MPLS_STACK_BOTTOM;
2537 }
2538
2539 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2540 unsigned int prio)
2541 {
2542 return htons(id | (cfi << 12) | (prio << 13));
2543 }
2544
2545 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2546 struct pktgen_dev *pkt_dev)
2547 {
2548 struct sk_buff *skb = NULL;
2549 __u8 *eth;
2550 struct udphdr *udph;
2551 int datalen, iplen;
2552 struct iphdr *iph;
2553 struct pktgen_hdr *pgh = NULL;
2554 __be16 protocol = htons(ETH_P_IP);
2555 __be32 *mpls;
2556 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2557 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2558 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2559 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2560 u16 queue_map;
2561
2562 if (pkt_dev->nr_labels)
2563 protocol = htons(ETH_P_MPLS_UC);
2564
2565 if (pkt_dev->vlan_id != 0xffff)
2566 protocol = htons(ETH_P_8021Q);
2567
2568 /* Update any of the values, used when we're incrementing various
2569 * fields.
2570 */
2571 queue_map = pkt_dev->cur_queue_map;
2572 mod_cur_headers(pkt_dev);
2573
2574 datalen = (odev->hard_header_len + 16) & ~0xf;
2575 skb = __netdev_alloc_skb(odev,
2576 pkt_dev->cur_pkt_size + 64
2577 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2578 if (!skb) {
2579 sprintf(pkt_dev->result, "No memory");
2580 return NULL;
2581 }
2582
2583 skb_reserve(skb, datalen);
2584
2585 /* Reserve for ethernet and IP header */
2586 eth = (__u8 *) skb_push(skb, 14);
2587 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2588 if (pkt_dev->nr_labels)
2589 mpls_push(mpls, pkt_dev);
2590
2591 if (pkt_dev->vlan_id != 0xffff) {
2592 if (pkt_dev->svlan_id != 0xffff) {
2593 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2594 *svlan_tci = build_tci(pkt_dev->svlan_id,
2595 pkt_dev->svlan_cfi,
2596 pkt_dev->svlan_p);
2597 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2598 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2599 }
2600 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2601 *vlan_tci = build_tci(pkt_dev->vlan_id,
2602 pkt_dev->vlan_cfi,
2603 pkt_dev->vlan_p);
2604 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2605 *vlan_encapsulated_proto = htons(ETH_P_IP);
2606 }
2607
2608 skb->network_header = skb->tail;
2609 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2610 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2611 skb_set_queue_mapping(skb, queue_map);
2612 iph = ip_hdr(skb);
2613 udph = udp_hdr(skb);
2614
2615 memcpy(eth, pkt_dev->hh, 12);
2616 *(__be16 *) & eth[12] = protocol;
2617
2618 /* Eth + IPh + UDPh + mpls */
2619 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2620 pkt_dev->pkt_overhead;
2621 if (datalen < sizeof(struct pktgen_hdr))
2622 datalen = sizeof(struct pktgen_hdr);
2623
2624 udph->source = htons(pkt_dev->cur_udp_src);
2625 udph->dest = htons(pkt_dev->cur_udp_dst);
2626 udph->len = htons(datalen + 8); /* DATA + udphdr */
2627 udph->check = 0; /* No checksum */
2628
2629 iph->ihl = 5;
2630 iph->version = 4;
2631 iph->ttl = 32;
2632 iph->tos = pkt_dev->tos;
2633 iph->protocol = IPPROTO_UDP; /* UDP */
2634 iph->saddr = pkt_dev->cur_saddr;
2635 iph->daddr = pkt_dev->cur_daddr;
2636 iph->id = htons(pkt_dev->ip_id);
2637 pkt_dev->ip_id++;
2638 iph->frag_off = 0;
2639 iplen = 20 + 8 + datalen;
2640 iph->tot_len = htons(iplen);
2641 iph->check = 0;
2642 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2643 skb->protocol = protocol;
2644 skb->mac_header = (skb->network_header - ETH_HLEN -
2645 pkt_dev->pkt_overhead);
2646 skb->dev = odev;
2647 skb->pkt_type = PACKET_HOST;
2648
2649 if (pkt_dev->nfrags <= 0) {
2650 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2651 memset(pgh + 1, 0, datalen - sizeof(struct pktgen_hdr));
2652 } else {
2653 int frags = pkt_dev->nfrags;
2654 int i, len;
2655
2656 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2657
2658 if (frags > MAX_SKB_FRAGS)
2659 frags = MAX_SKB_FRAGS;
2660 if (datalen > frags * PAGE_SIZE) {
2661 len = datalen - frags * PAGE_SIZE;
2662 memset(skb_put(skb, len), 0, len);
2663 datalen = frags * PAGE_SIZE;
2664 }
2665
2666 i = 0;
2667 while (datalen > 0) {
2668 struct page *page = alloc_pages(GFP_KERNEL | __GFP_ZERO, 0);
2669 skb_shinfo(skb)->frags[i].page = page;
2670 skb_shinfo(skb)->frags[i].page_offset = 0;
2671 skb_shinfo(skb)->frags[i].size =
2672 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2673 datalen -= skb_shinfo(skb)->frags[i].size;
2674 skb->len += skb_shinfo(skb)->frags[i].size;
2675 skb->data_len += skb_shinfo(skb)->frags[i].size;
2676 i++;
2677 skb_shinfo(skb)->nr_frags = i;
2678 }
2679
2680 while (i < frags) {
2681 int rem;
2682
2683 if (i == 0)
2684 break;
2685
2686 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2687 if (rem == 0)
2688 break;
2689
2690 skb_shinfo(skb)->frags[i - 1].size -= rem;
2691
2692 skb_shinfo(skb)->frags[i] =
2693 skb_shinfo(skb)->frags[i - 1];
2694 get_page(skb_shinfo(skb)->frags[i].page);
2695 skb_shinfo(skb)->frags[i].page =
2696 skb_shinfo(skb)->frags[i - 1].page;
2697 skb_shinfo(skb)->frags[i].page_offset +=
2698 skb_shinfo(skb)->frags[i - 1].size;
2699 skb_shinfo(skb)->frags[i].size = rem;
2700 i++;
2701 skb_shinfo(skb)->nr_frags = i;
2702 }
2703 }
2704
2705 /* Stamp the time, and sequence number,
2706 * convert them to network byte order
2707 */
2708 if (pgh) {
2709 struct timeval timestamp;
2710
2711 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2712 pgh->seq_num = htonl(pkt_dev->seq_num);
2713
2714 do_gettimeofday(&timestamp);
2715 pgh->tv_sec = htonl(timestamp.tv_sec);
2716 pgh->tv_usec = htonl(timestamp.tv_usec);
2717 }
2718
2719 #ifdef CONFIG_XFRM
2720 if (!process_ipsec(pkt_dev, skb, protocol))
2721 return NULL;
2722 #endif
2723
2724 return skb;
2725 }
2726
2727 /*
2728 * scan_ip6, fmt_ip taken from dietlibc-0.21
2729 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2730 *
2731 * Slightly modified for kernel.
2732 * Should be candidate for net/ipv4/utils.c
2733 * --ro
2734 */
2735
2736 static unsigned int scan_ip6(const char *s, char ip[16])
2737 {
2738 unsigned int i;
2739 unsigned int len = 0;
2740 unsigned long u;
2741 char suffix[16];
2742 unsigned int prefixlen = 0;
2743 unsigned int suffixlen = 0;
2744 __be32 tmp;
2745 char *pos;
2746
2747 for (i = 0; i < 16; i++)
2748 ip[i] = 0;
2749
2750 for (;;) {
2751 if (*s == ':') {
2752 len++;
2753 if (s[1] == ':') { /* Found "::", skip to part 2 */
2754 s += 2;
2755 len++;
2756 break;
2757 }
2758 s++;
2759 }
2760
2761 u = simple_strtoul(s, &pos, 16);
2762 i = pos - s;
2763 if (!i)
2764 return 0;
2765 if (prefixlen == 12 && s[i] == '.') {
2766
2767 /* the last 4 bytes may be written as IPv4 address */
2768
2769 tmp = in_aton(s);
2770 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2771 return i + len;
2772 }
2773 ip[prefixlen++] = (u >> 8);
2774 ip[prefixlen++] = (u & 255);
2775 s += i;
2776 len += i;
2777 if (prefixlen == 16)
2778 return len;
2779 }
2780
2781 /* part 2, after "::" */
2782 for (;;) {
2783 if (*s == ':') {
2784 if (suffixlen == 0)
2785 break;
2786 s++;
2787 len++;
2788 } else if (suffixlen != 0)
2789 break;
2790
2791 u = simple_strtol(s, &pos, 16);
2792 i = pos - s;
2793 if (!i) {
2794 if (*s)
2795 len--;
2796 break;
2797 }
2798 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2799 tmp = in_aton(s);
2800 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2801 sizeof(tmp));
2802 suffixlen += 4;
2803 len += strlen(s);
2804 break;
2805 }
2806 suffix[suffixlen++] = (u >> 8);
2807 suffix[suffixlen++] = (u & 255);
2808 s += i;
2809 len += i;
2810 if (prefixlen + suffixlen == 16)
2811 break;
2812 }
2813 for (i = 0; i < suffixlen; i++)
2814 ip[16 - suffixlen + i] = suffix[i];
2815 return len;
2816 }
2817
2818 static char tohex(char hexdigit)
2819 {
2820 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2821 }
2822
2823 static int fmt_xlong(char *s, unsigned int i)
2824 {
2825 char *bak = s;
2826 *s = tohex((i >> 12) & 0xf);
2827 if (s != bak || *s != '0')
2828 ++s;
2829 *s = tohex((i >> 8) & 0xf);
2830 if (s != bak || *s != '0')
2831 ++s;
2832 *s = tohex((i >> 4) & 0xf);
2833 if (s != bak || *s != '0')
2834 ++s;
2835 *s = tohex(i & 0xf);
2836 return s - bak + 1;
2837 }
2838
2839 static unsigned int fmt_ip6(char *s, const char ip[16])
2840 {
2841 unsigned int len;
2842 unsigned int i;
2843 unsigned int temp;
2844 unsigned int compressing;
2845 int j;
2846
2847 len = 0;
2848 compressing = 0;
2849 for (j = 0; j < 16; j += 2) {
2850
2851 #ifdef V4MAPPEDPREFIX
2852 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2853 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2854 temp = strlen(s);
2855 return len + temp;
2856 }
2857 #endif
2858 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2859 (unsigned long)(unsigned char)ip[j + 1];
2860 if (temp == 0) {
2861 if (!compressing) {
2862 compressing = 1;
2863 if (j == 0) {
2864 *s++ = ':';
2865 ++len;
2866 }
2867 }
2868 } else {
2869 if (compressing) {
2870 compressing = 0;
2871 *s++ = ':';
2872 ++len;
2873 }
2874 i = fmt_xlong(s, temp);
2875 len += i;
2876 s += i;
2877 if (j < 14) {
2878 *s++ = ':';
2879 ++len;
2880 }
2881 }
2882 }
2883 if (compressing) {
2884 *s++ = ':';
2885 ++len;
2886 }
2887 *s = 0;
2888 return len;
2889 }
2890
2891 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2892 struct pktgen_dev *pkt_dev)
2893 {
2894 struct sk_buff *skb = NULL;
2895 __u8 *eth;
2896 struct udphdr *udph;
2897 int datalen;
2898 struct ipv6hdr *iph;
2899 struct pktgen_hdr *pgh = NULL;
2900 __be16 protocol = htons(ETH_P_IPV6);
2901 __be32 *mpls;
2902 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2903 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2904 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2905 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2906 u16 queue_map;
2907
2908 if (pkt_dev->nr_labels)
2909 protocol = htons(ETH_P_MPLS_UC);
2910
2911 if (pkt_dev->vlan_id != 0xffff)
2912 protocol = htons(ETH_P_8021Q);
2913
2914 /* Update any of the values, used when we're incrementing various
2915 * fields.
2916 */
2917 queue_map = pkt_dev->cur_queue_map;
2918 mod_cur_headers(pkt_dev);
2919
2920 skb = __netdev_alloc_skb(odev,
2921 pkt_dev->cur_pkt_size + 64
2922 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
2923 if (!skb) {
2924 sprintf(pkt_dev->result, "No memory");
2925 return NULL;
2926 }
2927
2928 skb_reserve(skb, 16);
2929
2930 /* Reserve for ethernet and IP header */
2931 eth = (__u8 *) skb_push(skb, 14);
2932 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2933 if (pkt_dev->nr_labels)
2934 mpls_push(mpls, pkt_dev);
2935
2936 if (pkt_dev->vlan_id != 0xffff) {
2937 if (pkt_dev->svlan_id != 0xffff) {
2938 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2939 *svlan_tci = build_tci(pkt_dev->svlan_id,
2940 pkt_dev->svlan_cfi,
2941 pkt_dev->svlan_p);
2942 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2943 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2944 }
2945 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2946 *vlan_tci = build_tci(pkt_dev->vlan_id,
2947 pkt_dev->vlan_cfi,
2948 pkt_dev->vlan_p);
2949 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2950 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2951 }
2952
2953 skb->network_header = skb->tail;
2954 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2955 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2956 skb_set_queue_mapping(skb, queue_map);
2957 iph = ipv6_hdr(skb);
2958 udph = udp_hdr(skb);
2959
2960 memcpy(eth, pkt_dev->hh, 12);
2961 *(__be16 *) &eth[12] = protocol;
2962
2963 /* Eth + IPh + UDPh + mpls */
2964 datalen = pkt_dev->cur_pkt_size - 14 -
2965 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2966 pkt_dev->pkt_overhead;
2967
2968 if (datalen < sizeof(struct pktgen_hdr)) {
2969 datalen = sizeof(struct pktgen_hdr);
2970 if (net_ratelimit())
2971 printk(KERN_INFO "pktgen: increased datalen to %d\n",
2972 datalen);
2973 }
2974
2975 udph->source = htons(pkt_dev->cur_udp_src);
2976 udph->dest = htons(pkt_dev->cur_udp_dst);
2977 udph->len = htons(datalen + sizeof(struct udphdr));
2978 udph->check = 0; /* No checksum */
2979
2980 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2981
2982 if (pkt_dev->traffic_class) {
2983 /* Version + traffic class + flow (0) */
2984 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2985 }
2986
2987 iph->hop_limit = 32;
2988
2989 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2990 iph->nexthdr = IPPROTO_UDP;
2991
2992 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2993 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2994
2995 skb->mac_header = (skb->network_header - ETH_HLEN -
2996 pkt_dev->pkt_overhead);
2997 skb->protocol = protocol;
2998 skb->dev = odev;
2999 skb->pkt_type = PACKET_HOST;
3000
3001 if (pkt_dev->nfrags <= 0)
3002 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
3003 else {
3004 int frags = pkt_dev->nfrags;
3005 int i;
3006
3007 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
3008
3009 if (frags > MAX_SKB_FRAGS)
3010 frags = MAX_SKB_FRAGS;
3011 if (datalen > frags * PAGE_SIZE) {
3012 skb_put(skb, datalen - frags * PAGE_SIZE);
3013 datalen = frags * PAGE_SIZE;
3014 }
3015
3016 i = 0;
3017 while (datalen > 0) {
3018 struct page *page = alloc_pages(GFP_KERNEL, 0);
3019 skb_shinfo(skb)->frags[i].page = page;
3020 skb_shinfo(skb)->frags[i].page_offset = 0;
3021 skb_shinfo(skb)->frags[i].size =
3022 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
3023 datalen -= skb_shinfo(skb)->frags[i].size;
3024 skb->len += skb_shinfo(skb)->frags[i].size;
3025 skb->data_len += skb_shinfo(skb)->frags[i].size;
3026 i++;
3027 skb_shinfo(skb)->nr_frags = i;
3028 }
3029
3030 while (i < frags) {
3031 int rem;
3032
3033 if (i == 0)
3034 break;
3035
3036 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
3037 if (rem == 0)
3038 break;
3039
3040 skb_shinfo(skb)->frags[i - 1].size -= rem;
3041
3042 skb_shinfo(skb)->frags[i] =
3043 skb_shinfo(skb)->frags[i - 1];
3044 get_page(skb_shinfo(skb)->frags[i].page);
3045 skb_shinfo(skb)->frags[i].page =
3046 skb_shinfo(skb)->frags[i - 1].page;
3047 skb_shinfo(skb)->frags[i].page_offset +=
3048 skb_shinfo(skb)->frags[i - 1].size;
3049 skb_shinfo(skb)->frags[i].size = rem;
3050 i++;
3051 skb_shinfo(skb)->nr_frags = i;
3052 }
3053 }
3054
3055 /* Stamp the time, and sequence number,
3056 * convert them to network byte order
3057 * should we update cloned packets too ?
3058 */
3059 if (pgh) {
3060 struct timeval timestamp;
3061
3062 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
3063 pgh->seq_num = htonl(pkt_dev->seq_num);
3064
3065 do_gettimeofday(&timestamp);
3066 pgh->tv_sec = htonl(timestamp.tv_sec);
3067 pgh->tv_usec = htonl(timestamp.tv_usec);
3068 }
3069 /* pkt_dev->seq_num++; FF: you really mean this? */
3070
3071 return skb;
3072 }
3073
3074 static struct sk_buff *fill_packet(struct net_device *odev,
3075 struct pktgen_dev *pkt_dev)
3076 {
3077 if (pkt_dev->flags & F_IPV6)
3078 return fill_packet_ipv6(odev, pkt_dev);
3079 else
3080 return fill_packet_ipv4(odev, pkt_dev);
3081 }
3082
3083 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3084 {
3085 pkt_dev->seq_num = 1;
3086 pkt_dev->idle_acc = 0;
3087 pkt_dev->sofar = 0;
3088 pkt_dev->tx_bytes = 0;
3089 pkt_dev->errors = 0;
3090 }
3091
3092 /* Set up structure for sending pkts, clear counters */
3093
3094 static void pktgen_run(struct pktgen_thread *t)
3095 {
3096 struct pktgen_dev *pkt_dev;
3097 int started = 0;
3098
3099 pr_debug("pktgen: entering pktgen_run. %p\n", t);
3100
3101 if_lock(t);
3102 list_for_each_entry(pkt_dev, &t->if_list, list) {
3103
3104 /*
3105 * setup odev and create initial packet.
3106 */
3107 pktgen_setup_inject(pkt_dev);
3108
3109 if (pkt_dev->odev) {
3110 pktgen_clear_counters(pkt_dev);
3111 pkt_dev->running = 1; /* Cranke yeself! */
3112 pkt_dev->skb = NULL;
3113 pkt_dev->started_at =
3114 pkt_dev->next_tx = ktime_now();
3115
3116 set_pkt_overhead(pkt_dev);
3117
3118 strcpy(pkt_dev->result, "Starting");
3119 started++;
3120 } else
3121 strcpy(pkt_dev->result, "Error starting");
3122 }
3123 if_unlock(t);
3124 if (started)
3125 t->control &= ~(T_STOP);
3126 }
3127
3128 static void pktgen_stop_all_threads_ifs(void)
3129 {
3130 struct pktgen_thread *t;
3131
3132 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n");
3133
3134 mutex_lock(&pktgen_thread_lock);
3135
3136 list_for_each_entry(t, &pktgen_threads, th_list)
3137 t->control |= T_STOP;
3138
3139 mutex_unlock(&pktgen_thread_lock);
3140 }
3141
3142 static int thread_is_running(const struct pktgen_thread *t)
3143 {
3144 const struct pktgen_dev *pkt_dev;
3145
3146 list_for_each_entry(pkt_dev, &t->if_list, list)
3147 if (pkt_dev->running)
3148 return 1;
3149 return 0;
3150 }
3151
3152 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3153 {
3154 if_lock(t);
3155
3156 while (thread_is_running(t)) {
3157
3158 if_unlock(t);
3159
3160 msleep_interruptible(100);
3161
3162 if (signal_pending(current))
3163 goto signal;
3164 if_lock(t);
3165 }
3166 if_unlock(t);
3167 return 1;
3168 signal:
3169 return 0;
3170 }
3171
3172 static int pktgen_wait_all_threads_run(void)
3173 {
3174 struct pktgen_thread *t;
3175 int sig = 1;
3176
3177 mutex_lock(&pktgen_thread_lock);
3178
3179 list_for_each_entry(t, &pktgen_threads, th_list) {
3180 sig = pktgen_wait_thread_run(t);
3181 if (sig == 0)
3182 break;
3183 }
3184
3185 if (sig == 0)
3186 list_for_each_entry(t, &pktgen_threads, th_list)
3187 t->control |= (T_STOP);
3188
3189 mutex_unlock(&pktgen_thread_lock);
3190 return sig;
3191 }
3192
3193 static void pktgen_run_all_threads(void)
3194 {
3195 struct pktgen_thread *t;
3196
3197 pr_debug("pktgen: entering pktgen_run_all_threads.\n");
3198
3199 mutex_lock(&pktgen_thread_lock);
3200
3201 list_for_each_entry(t, &pktgen_threads, th_list)
3202 t->control |= (T_RUN);
3203
3204 mutex_unlock(&pktgen_thread_lock);
3205
3206 /* Propagate thread->control */
3207 schedule_timeout_interruptible(msecs_to_jiffies(125));
3208
3209 pktgen_wait_all_threads_run();
3210 }
3211
3212 static void pktgen_reset_all_threads(void)
3213 {
3214 struct pktgen_thread *t;
3215
3216 pr_debug("pktgen: entering pktgen_reset_all_threads.\n");
3217
3218 mutex_lock(&pktgen_thread_lock);
3219
3220 list_for_each_entry(t, &pktgen_threads, th_list)
3221 t->control |= (T_REMDEVALL);
3222
3223 mutex_unlock(&pktgen_thread_lock);
3224
3225 /* Propagate thread->control */
3226 schedule_timeout_interruptible(msecs_to_jiffies(125));
3227
3228 pktgen_wait_all_threads_run();
3229 }
3230
3231 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3232 {
3233 __u64 bps, mbps, pps;
3234 char *p = pkt_dev->result;
3235 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3236 pkt_dev->started_at);
3237 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3238
3239 p += sprintf(p, "OK: %llu(c%llu+d%llu) nsec, %llu (%dbyte,%dfrags)\n",
3240 (unsigned long long)ktime_to_us(elapsed),
3241 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3242 (unsigned long long)ktime_to_us(idle),
3243 (unsigned long long)pkt_dev->sofar,
3244 pkt_dev->cur_pkt_size, nr_frags);
3245
3246 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3247 ktime_to_ns(elapsed));
3248
3249 bps = pps * 8 * pkt_dev->cur_pkt_size;
3250
3251 mbps = bps;
3252 do_div(mbps, 1000000);
3253 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3254 (unsigned long long)pps,
3255 (unsigned long long)mbps,
3256 (unsigned long long)bps,
3257 (unsigned long long)pkt_dev->errors);
3258 }
3259
3260 /* Set stopped-at timer, remove from running list, do counters & statistics */
3261 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3262 {
3263 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3264
3265 if (!pkt_dev->running) {
3266 printk(KERN_WARNING "pktgen: interface: %s is already "
3267 "stopped\n", pkt_dev->odevname);
3268 return -EINVAL;
3269 }
3270
3271 kfree_skb(pkt_dev->skb);
3272 pkt_dev->skb = NULL;
3273 pkt_dev->stopped_at = ktime_now();
3274 pkt_dev->running = 0;
3275
3276 show_results(pkt_dev, nr_frags);
3277
3278 return 0;
3279 }
3280
3281 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3282 {
3283 struct pktgen_dev *pkt_dev, *best = NULL;
3284
3285 if_lock(t);
3286
3287 list_for_each_entry(pkt_dev, &t->if_list, list) {
3288 if (!pkt_dev->running)
3289 continue;
3290 if (best == NULL)
3291 best = pkt_dev;
3292 else if (ktime_lt(pkt_dev->next_tx, best->next_tx))
3293 best = pkt_dev;
3294 }
3295 if_unlock(t);
3296 return best;
3297 }
3298
3299 static void pktgen_stop(struct pktgen_thread *t)
3300 {
3301 struct pktgen_dev *pkt_dev;
3302
3303 pr_debug("pktgen: entering pktgen_stop\n");
3304
3305 if_lock(t);
3306
3307 list_for_each_entry(pkt_dev, &t->if_list, list) {
3308 pktgen_stop_device(pkt_dev);
3309 }
3310
3311 if_unlock(t);
3312 }
3313
3314 /*
3315 * one of our devices needs to be removed - find it
3316 * and remove it
3317 */
3318 static void pktgen_rem_one_if(struct pktgen_thread *t)
3319 {
3320 struct list_head *q, *n;
3321 struct pktgen_dev *cur;
3322
3323 pr_debug("pktgen: entering pktgen_rem_one_if\n");
3324
3325 if_lock(t);
3326
3327 list_for_each_safe(q, n, &t->if_list) {
3328 cur = list_entry(q, struct pktgen_dev, list);
3329
3330 if (!cur->removal_mark)
3331 continue;
3332
3333 kfree_skb(cur->skb);
3334 cur->skb = NULL;
3335
3336 pktgen_remove_device(t, cur);
3337
3338 break;
3339 }
3340
3341 if_unlock(t);
3342 }
3343
3344 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3345 {
3346 struct list_head *q, *n;
3347 struct pktgen_dev *cur;
3348
3349 /* Remove all devices, free mem */
3350
3351 pr_debug("pktgen: entering pktgen_rem_all_ifs\n");
3352 if_lock(t);
3353
3354 list_for_each_safe(q, n, &t->if_list) {
3355 cur = list_entry(q, struct pktgen_dev, list);
3356
3357 kfree_skb(cur->skb);
3358 cur->skb = NULL;
3359
3360 pktgen_remove_device(t, cur);
3361 }
3362
3363 if_unlock(t);
3364 }
3365
3366 static void pktgen_rem_thread(struct pktgen_thread *t)
3367 {
3368 /* Remove from the thread list */
3369
3370 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3371
3372 mutex_lock(&pktgen_thread_lock);
3373
3374 list_del(&t->th_list);
3375
3376 mutex_unlock(&pktgen_thread_lock);
3377 }
3378
3379 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3380 {
3381 ktime_t idle_start = ktime_now();
3382 schedule();
3383 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3384 }
3385
3386 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3387 {
3388 ktime_t idle_start = ktime_now();
3389
3390 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3391 if (signal_pending(current))
3392 break;
3393
3394 if (need_resched())
3395 pktgen_resched(pkt_dev);
3396 else
3397 cpu_relax();
3398 }
3399 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3400 }
3401
3402 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3403 {
3404 struct net_device *odev = pkt_dev->odev;
3405 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3406 = odev->netdev_ops->ndo_start_xmit;
3407 struct netdev_queue *txq;
3408 u16 queue_map;
3409 int ret;
3410
3411 /* If device is offline, then don't send */
3412 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3413 pktgen_stop_device(pkt_dev);
3414 return;
3415 }
3416
3417 /* This is max DELAY, this has special meaning of
3418 * "never transmit"
3419 */
3420 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3421 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX);
3422 return;
3423 }
3424
3425 /* If no skb or clone count exhausted then get new one */
3426 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3427 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3428 /* build a new pkt */
3429 kfree_skb(pkt_dev->skb);
3430
3431 pkt_dev->skb = fill_packet(odev, pkt_dev);
3432 if (pkt_dev->skb == NULL) {
3433 printk(KERN_ERR "pktgen: ERROR: couldn't "
3434 "allocate skb in fill_packet.\n");
3435 schedule();
3436 pkt_dev->clone_count--; /* back out increment, OOM */
3437 return;
3438 }
3439 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3440 pkt_dev->allocated_skbs++;
3441 pkt_dev->clone_count = 0; /* reset counter */
3442 }
3443
3444 if (pkt_dev->delay && pkt_dev->last_ok)
3445 spin(pkt_dev, pkt_dev->next_tx);
3446
3447 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3448 txq = netdev_get_tx_queue(odev, queue_map);
3449
3450 __netif_tx_lock_bh(txq);
3451
3452 if (unlikely(netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq))) {
3453 ret = NETDEV_TX_BUSY;
3454 pkt_dev->last_ok = 0;
3455 goto unlock;
3456 }
3457 atomic_inc(&(pkt_dev->skb->users));
3458 ret = (*xmit)(pkt_dev->skb, odev);
3459
3460 switch (ret) {
3461 case NETDEV_TX_OK:
3462 txq_trans_update(txq);
3463 pkt_dev->last_ok = 1;
3464 pkt_dev->sofar++;
3465 pkt_dev->seq_num++;
3466 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3467 break;
3468 default: /* Drivers are not supposed to return other values! */
3469 if (net_ratelimit())
3470 pr_info("pktgen: %s xmit error: %d\n",
3471 pkt_dev->odevname, ret);
3472 pkt_dev->errors++;
3473 /* fallthru */
3474 case NETDEV_TX_LOCKED:
3475 case NETDEV_TX_BUSY:
3476 /* Retry it next time */
3477 atomic_dec(&(pkt_dev->skb->users));
3478 pkt_dev->last_ok = 0;
3479 }
3480 unlock:
3481 __netif_tx_unlock_bh(txq);
3482
3483 /* If pkt_dev->count is zero, then run forever */
3484 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3485 pktgen_wait_for_skb(pkt_dev);
3486
3487 /* Done with this */
3488 pktgen_stop_device(pkt_dev);
3489 }
3490 }
3491
3492 /*
3493 * Main loop of the thread goes here
3494 */
3495
3496 static int pktgen_thread_worker(void *arg)
3497 {
3498 DEFINE_WAIT(wait);
3499 struct pktgen_thread *t = arg;
3500 struct pktgen_dev *pkt_dev = NULL;
3501 int cpu = t->cpu;
3502
3503 BUG_ON(smp_processor_id() != cpu);
3504
3505 init_waitqueue_head(&t->queue);
3506 complete(&t->start_done);
3507
3508 pr_debug("pktgen: starting pktgen/%d: pid=%d\n",
3509 cpu, task_pid_nr(current));
3510
3511 set_current_state(TASK_INTERRUPTIBLE);
3512
3513 set_freezable();
3514
3515 while (!kthread_should_stop()) {
3516 pkt_dev = next_to_run(t);
3517
3518 if (unlikely(!pkt_dev && t->control == 0)) {
3519 wait_event_interruptible_timeout(t->queue,
3520 t->control != 0,
3521 HZ/10);
3522 continue;
3523 }
3524
3525 __set_current_state(TASK_RUNNING);
3526
3527 if (likely(pkt_dev)) {
3528 pktgen_xmit(pkt_dev);
3529
3530 if (need_resched())
3531 pktgen_resched(pkt_dev);
3532 else
3533 cpu_relax();
3534 }
3535
3536 if (t->control & T_STOP) {
3537 pktgen_stop(t);
3538 t->control &= ~(T_STOP);
3539 }
3540
3541 if (t->control & T_RUN) {
3542 pktgen_run(t);
3543 t->control &= ~(T_RUN);
3544 }
3545
3546 if (t->control & T_REMDEVALL) {
3547 pktgen_rem_all_ifs(t);
3548 t->control &= ~(T_REMDEVALL);
3549 }
3550
3551 if (t->control & T_REMDEV) {
3552 pktgen_rem_one_if(t);
3553 t->control &= ~(T_REMDEV);
3554 }
3555
3556 try_to_freeze();
3557
3558 set_current_state(TASK_INTERRUPTIBLE);
3559 }
3560
3561 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm);
3562 pktgen_stop(t);
3563
3564 pr_debug("pktgen: %s removing all device\n", t->tsk->comm);
3565 pktgen_rem_all_ifs(t);
3566
3567 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm);
3568 pktgen_rem_thread(t);
3569
3570 return 0;
3571 }
3572
3573 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3574 const char *ifname, bool exact)
3575 {
3576 struct pktgen_dev *p, *pkt_dev = NULL;
3577 size_t len = strlen(ifname);
3578
3579 if_lock(t);
3580 list_for_each_entry(p, &t->if_list, list)
3581 if (strncmp(p->odevname, ifname, len) == 0) {
3582 if (p->odevname[len]) {
3583 if (exact || p->odevname[len] != '@')
3584 continue;
3585 }
3586 pkt_dev = p;
3587 break;
3588 }
3589
3590 if_unlock(t);
3591 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev);
3592 return pkt_dev;
3593 }
3594
3595 /*
3596 * Adds a dev at front of if_list.
3597 */
3598
3599 static int add_dev_to_thread(struct pktgen_thread *t,
3600 struct pktgen_dev *pkt_dev)
3601 {
3602 int rv = 0;
3603
3604 if_lock(t);
3605
3606 if (pkt_dev->pg_thread) {
3607 printk(KERN_ERR "pktgen: ERROR: already assigned "
3608 "to a thread.\n");
3609 rv = -EBUSY;
3610 goto out;
3611 }
3612
3613 list_add(&pkt_dev->list, &t->if_list);
3614 pkt_dev->pg_thread = t;
3615 pkt_dev->running = 0;
3616
3617 out:
3618 if_unlock(t);
3619 return rv;
3620 }
3621
3622 /* Called under thread lock */
3623
3624 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3625 {
3626 struct pktgen_dev *pkt_dev;
3627 int err;
3628 int node = cpu_to_node(t->cpu);
3629
3630 /* We don't allow a device to be on several threads */
3631
3632 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3633 if (pkt_dev) {
3634 printk(KERN_ERR "pktgen: ERROR: interface already used.\n");
3635 return -EBUSY;
3636 }
3637
3638 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3639 if (!pkt_dev)
3640 return -ENOMEM;
3641
3642 strcpy(pkt_dev->odevname, ifname);
3643 pkt_dev->flows = vmalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3644 node);
3645 if (pkt_dev->flows == NULL) {
3646 kfree(pkt_dev);
3647 return -ENOMEM;
3648 }
3649 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3650
3651 pkt_dev->removal_mark = 0;
3652 pkt_dev->min_pkt_size = ETH_ZLEN;
3653 pkt_dev->max_pkt_size = ETH_ZLEN;
3654 pkt_dev->nfrags = 0;
3655 pkt_dev->clone_skb = pg_clone_skb_d;
3656 pkt_dev->delay = pg_delay_d;
3657 pkt_dev->count = pg_count_d;
3658 pkt_dev->sofar = 0;
3659 pkt_dev->udp_src_min = 9; /* sink port */
3660 pkt_dev->udp_src_max = 9;
3661 pkt_dev->udp_dst_min = 9;
3662 pkt_dev->udp_dst_max = 9;
3663
3664 pkt_dev->vlan_p = 0;
3665 pkt_dev->vlan_cfi = 0;
3666 pkt_dev->vlan_id = 0xffff;
3667 pkt_dev->svlan_p = 0;
3668 pkt_dev->svlan_cfi = 0;
3669 pkt_dev->svlan_id = 0xffff;
3670
3671 err = pktgen_setup_dev(pkt_dev, ifname);
3672 if (err)
3673 goto out1;
3674
3675 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3676 &pktgen_if_fops, pkt_dev);
3677 if (!pkt_dev->entry) {
3678 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3679 PG_PROC_DIR, ifname);
3680 err = -EINVAL;
3681 goto out2;
3682 }
3683 #ifdef CONFIG_XFRM
3684 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3685 pkt_dev->ipsproto = IPPROTO_ESP;
3686 #endif
3687
3688 return add_dev_to_thread(t, pkt_dev);
3689 out2:
3690 dev_put(pkt_dev->odev);
3691 out1:
3692 #ifdef CONFIG_XFRM
3693 free_SAs(pkt_dev);
3694 #endif
3695 vfree(pkt_dev->flows);
3696 kfree(pkt_dev);
3697 return err;
3698 }
3699
3700 static int __init pktgen_create_thread(int cpu)
3701 {
3702 struct pktgen_thread *t;
3703 struct proc_dir_entry *pe;
3704 struct task_struct *p;
3705
3706 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3707 cpu_to_node(cpu));
3708 if (!t) {
3709 printk(KERN_ERR "pktgen: ERROR: out of memory, can't "
3710 "create new thread.\n");
3711 return -ENOMEM;
3712 }
3713
3714 spin_lock_init(&t->if_lock);
3715 t->cpu = cpu;
3716
3717 INIT_LIST_HEAD(&t->if_list);
3718
3719 list_add_tail(&t->th_list, &pktgen_threads);
3720 init_completion(&t->start_done);
3721
3722 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu);
3723 if (IS_ERR(p)) {
3724 printk(KERN_ERR "pktgen: kernel_thread() failed "
3725 "for cpu %d\n", t->cpu);
3726 list_del(&t->th_list);
3727 kfree(t);
3728 return PTR_ERR(p);
3729 }
3730 kthread_bind(p, cpu);
3731 t->tsk = p;
3732
3733 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3734 &pktgen_thread_fops, t);
3735 if (!pe) {
3736 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3737 PG_PROC_DIR, t->tsk->comm);
3738 kthread_stop(p);
3739 list_del(&t->th_list);
3740 kfree(t);
3741 return -EINVAL;
3742 }
3743
3744 wake_up_process(p);
3745 wait_for_completion(&t->start_done);
3746
3747 return 0;
3748 }
3749
3750 /*
3751 * Removes a device from the thread if_list.
3752 */
3753 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3754 struct pktgen_dev *pkt_dev)
3755 {
3756 struct list_head *q, *n;
3757 struct pktgen_dev *p;
3758
3759 list_for_each_safe(q, n, &t->if_list) {
3760 p = list_entry(q, struct pktgen_dev, list);
3761 if (p == pkt_dev)
3762 list_del(&p->list);
3763 }
3764 }
3765
3766 static int pktgen_remove_device(struct pktgen_thread *t,
3767 struct pktgen_dev *pkt_dev)
3768 {
3769
3770 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev);
3771
3772 if (pkt_dev->running) {
3773 printk(KERN_WARNING "pktgen: WARNING: trying to remove a "
3774 "running interface, stopping it now.\n");
3775 pktgen_stop_device(pkt_dev);
3776 }
3777
3778 /* Dis-associate from the interface */
3779
3780 if (pkt_dev->odev) {
3781 dev_put(pkt_dev->odev);
3782 pkt_dev->odev = NULL;
3783 }
3784
3785 /* And update the thread if_list */
3786
3787 _rem_dev_from_if_list(t, pkt_dev);
3788
3789 if (pkt_dev->entry)
3790 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3791
3792 #ifdef CONFIG_XFRM
3793 free_SAs(pkt_dev);
3794 #endif
3795 vfree(pkt_dev->flows);
3796 kfree(pkt_dev);
3797 return 0;
3798 }
3799
3800 static int __init pg_init(void)
3801 {
3802 int cpu;
3803 struct proc_dir_entry *pe;
3804
3805 printk(KERN_INFO "%s", version);
3806
3807 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3808 if (!pg_proc_dir)
3809 return -ENODEV;
3810
3811 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3812 if (pe == NULL) {
3813 printk(KERN_ERR "pktgen: ERROR: cannot create %s "
3814 "procfs entry.\n", PGCTRL);
3815 proc_net_remove(&init_net, PG_PROC_DIR);
3816 return -EINVAL;
3817 }
3818
3819 /* Register us to receive netdevice events */
3820 register_netdevice_notifier(&pktgen_notifier_block);
3821
3822 for_each_online_cpu(cpu) {
3823 int err;
3824
3825 err = pktgen_create_thread(cpu);
3826 if (err)
3827 printk(KERN_WARNING "pktgen: WARNING: Cannot create "
3828 "thread for cpu %d (%d)\n", cpu, err);
3829 }
3830
3831 if (list_empty(&pktgen_threads)) {
3832 printk(KERN_ERR "pktgen: ERROR: Initialization failed for "
3833 "all threads\n");
3834 unregister_netdevice_notifier(&pktgen_notifier_block);
3835 remove_proc_entry(PGCTRL, pg_proc_dir);
3836 proc_net_remove(&init_net, PG_PROC_DIR);
3837 return -ENODEV;
3838 }
3839
3840 return 0;
3841 }
3842
3843 static void __exit pg_cleanup(void)
3844 {
3845 struct pktgen_thread *t;
3846 struct list_head *q, *n;
3847 wait_queue_head_t queue;
3848 init_waitqueue_head(&queue);
3849
3850 /* Stop all interfaces & threads */
3851
3852 list_for_each_safe(q, n, &pktgen_threads) {
3853 t = list_entry(q, struct pktgen_thread, th_list);
3854 kthread_stop(t->tsk);
3855 kfree(t);
3856 }
3857
3858 /* Un-register us from receiving netdevice events */
3859 unregister_netdevice_notifier(&pktgen_notifier_block);
3860
3861 /* Clean up proc file system */
3862 remove_proc_entry(PGCTRL, pg_proc_dir);
3863 proc_net_remove(&init_net, PG_PROC_DIR);
3864 }
3865
3866 module_init(pg_init);
3867 module_exit(pg_cleanup);
3868
3869 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3870 MODULE_DESCRIPTION("Packet Generator tool");
3871 MODULE_LICENSE("GPL");
3872 MODULE_VERSION(VERSION);
3873 module_param(pg_count_d, int, 0);
3874 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3875 module_param(pg_delay_d, int, 0);
3876 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3877 module_param(pg_clone_skb_d, int, 0);
3878 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3879 module_param(debug, int, 0);
3880 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
kernel-based virtual machine