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pktgen: avoid calling gettimeofday
[deliverable/linux.git] / net / core / pktgen.c
1 /*
2 * Authors:
3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
4 * Uppsala University and
5 * Swedish University of Agricultural Sciences
6 *
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 * Ben Greear <greearb@candelatech.com>
9 * Jens Låås <jens.laas@data.slu.se>
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 *
16 *
17 * A tool for loading the network with preconfigurated packets.
18 * The tool is implemented as a linux module. Parameters are output
19 * device, delay (to hard_xmit), number of packets, and whether
20 * to use multiple SKBs or just the same one.
21 * pktgen uses the installed interface's output routine.
22 *
23 * Additional hacking by:
24 *
25 * Jens.Laas@data.slu.se
26 * Improved by ANK. 010120.
27 * Improved by ANK even more. 010212.
28 * MAC address typo fixed. 010417 --ro
29 * Integrated. 020301 --DaveM
30 * Added multiskb option 020301 --DaveM
31 * Scaling of results. 020417--sigurdur@linpro.no
32 * Significant re-work of the module:
33 * * Convert to threaded model to more efficiently be able to transmit
34 * and receive on multiple interfaces at once.
35 * * Converted many counters to __u64 to allow longer runs.
36 * * Allow configuration of ranges, like min/max IP address, MACs,
37 * and UDP-ports, for both source and destination, and can
38 * set to use a random distribution or sequentially walk the range.
39 * * Can now change most values after starting.
40 * * Place 12-byte packet in UDP payload with magic number,
41 * sequence number, and timestamp.
42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and
43 * latencies (with micro-second) precision.
44 * * Add IOCTL interface to easily get counters & configuration.
45 * --Ben Greear <greearb@candelatech.com>
46 *
47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
49 * as a "fastpath" with a configurable number of clones after alloc's.
50 * clone_skb=0 means all packets are allocated this also means ranges time
51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
52 * clones.
53 *
54 * Also moved to /proc/net/pktgen/
55 * --ro
56 *
57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
58 * mistakes. Also merged in DaveM's patch in the -pre6 patch.
59 * --Ben Greear <greearb@candelatech.com>
60 *
61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
62 *
63 *
64 * 021124 Finished major redesign and rewrite for new functionality.
65 * See Documentation/networking/pktgen.txt for how to use this.
66 *
67 * The new operation:
68 * For each CPU one thread/process is created at start. This process checks
69 * for running devices in the if_list and sends packets until count is 0 it
70 * also the thread checks the thread->control which is used for inter-process
71 * communication. controlling process "posts" operations to the threads this
72 * way. The if_lock should be possible to remove when add/rem_device is merged
73 * into this too.
74 *
75 * By design there should only be *one* "controlling" process. In practice
76 * multiple write accesses gives unpredictable result. Understood by "write"
77 * to /proc gives result code thats should be read be the "writer".
78 * For practical use this should be no problem.
79 *
80 * Note when adding devices to a specific CPU there good idea to also assign
81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
82 * --ro
83 *
84 * Fix refcount off by one if first packet fails, potential null deref,
85 * memleak 030710- KJP
86 *
87 * First "ranges" functionality for ipv6 030726 --ro
88 *
89 * Included flow support. 030802 ANK.
90 *
91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
92 *
93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
95 *
96 * New xmit() return, do_div and misc clean up by Stephen Hemminger
97 * <shemminger@osdl.org> 040923
98 *
99 * Randy Dunlap fixed u64 printk compiler waring
100 *
101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
103 *
104 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
106 *
107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
108 * 050103
109 *
110 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
111 *
112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
113 *
114 * Fixed src_mac command to set source mac of packet to value specified in
115 * command by Adit Ranadive <adit.262@gmail.com>
116 *
117 */
118 #include <linux/sys.h>
119 #include <linux/types.h>
120 #include <linux/module.h>
121 #include <linux/moduleparam.h>
122 #include <linux/kernel.h>
123 #include <linux/mutex.h>
124 #include <linux/sched.h>
125 #include <linux/slab.h>
126 #include <linux/vmalloc.h>
127 #include <linux/unistd.h>
128 #include <linux/string.h>
129 #include <linux/ptrace.h>
130 #include <linux/errno.h>
131 #include <linux/ioport.h>
132 #include <linux/interrupt.h>
133 #include <linux/capability.h>
134 #include <linux/freezer.h>
135 #include <linux/delay.h>
136 #include <linux/timer.h>
137 #include <linux/list.h>
138 #include <linux/init.h>
139 #include <linux/skbuff.h>
140 #include <linux/netdevice.h>
141 #include <linux/inet.h>
142 #include <linux/inetdevice.h>
143 #include <linux/rtnetlink.h>
144 #include <linux/if_arp.h>
145 #include <linux/if_vlan.h>
146 #include <linux/in.h>
147 #include <linux/ip.h>
148 #include <linux/ipv6.h>
149 #include <linux/udp.h>
150 #include <linux/proc_fs.h>
151 #include <linux/seq_file.h>
152 #include <linux/wait.h>
153 #include <linux/etherdevice.h>
154 #include <linux/kthread.h>
155 #include <net/net_namespace.h>
156 #include <net/checksum.h>
157 #include <net/ipv6.h>
158 #include <net/addrconf.h>
159 #ifdef CONFIG_XFRM
160 #include <net/xfrm.h>
161 #endif
162 #include <asm/byteorder.h>
163 #include <linux/rcupdate.h>
164 #include <linux/bitops.h>
165 #include <asm/io.h>
166 #include <asm/dma.h>
167 #include <asm/uaccess.h>
168 #include <asm/div64.h> /* do_div */
169 #include <asm/timex.h>
170
171 #define VERSION "pktgen v2.70: Packet Generator for packet performance testing.\n"
172
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_TERMINATE (1<<0)
196 #define T_STOP (1<<1) /* Stop run */
197 #define T_RUN (1<<2) /* Start run */
198 #define T_REMDEVALL (1<<3) /* Remove all devs */
199 #define T_REMDEV (1<<4) /* Remove one dev */
200
201 /* If lock -- can be removed after some work */
202 #define if_lock(t) spin_lock(&(t->if_lock));
203 #define if_unlock(t) spin_unlock(&(t->if_lock));
204
205 /* Used to help with determining the pkts on receive */
206 #define PKTGEN_MAGIC 0xbe9be955
207 #define PG_PROC_DIR "pktgen"
208 #define PGCTRL "pgctrl"
209 static struct proc_dir_entry *pg_proc_dir = NULL;
210
211 #define MAX_CFLOWS 65536
212
213 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
214 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
215
216 struct flow_state {
217 __be32 cur_daddr;
218 int count;
219 #ifdef CONFIG_XFRM
220 struct xfrm_state *x;
221 #endif
222 __u32 flags;
223 };
224
225 /* flow flag bits */
226 #define F_INIT (1<<0) /* flow has been initialized */
227
228 struct pktgen_dev {
229 /*
230 * Try to keep frequent/infrequent used vars. separated.
231 */
232 struct proc_dir_entry *entry; /* proc file */
233 struct pktgen_thread *pg_thread;/* the owner */
234 struct list_head list; /* Used for chaining in the thread's run-queue */
235
236 int running; /* if this changes to false, the test will stop */
237
238 /* If min != max, then we will either do a linear iteration, or
239 * we will do a random selection from within the range.
240 */
241 __u32 flags;
242 int removal_mark; /* non-zero => the device is marked for
243 * removal by worker thread */
244
245 int min_pkt_size; /* = ETH_ZLEN; */
246 int max_pkt_size; /* = ETH_ZLEN; */
247 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
248 int nfrags;
249 __u32 delay_us; /* Default delay */
250 __u32 delay_ns;
251 __u64 count; /* Default No packets to send */
252 __u64 sofar; /* How many pkts we've sent so far */
253 __u64 tx_bytes; /* How many bytes we've transmitted */
254 __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */
255
256 /* runtime counters relating to clone_skb */
257 __u64 next_tx_us; /* timestamp of when to tx next */
258 __u32 next_tx_ns;
259
260 __u64 allocated_skbs;
261 __u32 clone_count;
262 int last_ok; /* Was last skb sent?
263 * Or a failed transmit of some sort? This will keep
264 * sequence numbers in order, for example.
265 */
266 __u64 started_at; /* micro-seconds */
267 __u64 stopped_at; /* micro-seconds */
268 __u64 idle_acc; /* micro-seconds */
269 __u32 seq_num;
270
271 int clone_skb; /* Use multiple SKBs during packet gen. If this number
272 * is greater than 1, then that many copies of the same
273 * packet will be sent before a new packet is allocated.
274 * For instance, if you want to send 1024 identical packets
275 * before creating a new packet, set clone_skb to 1024.
276 */
277
278 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
279 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
280 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
281 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
282
283 struct in6_addr in6_saddr;
284 struct in6_addr in6_daddr;
285 struct in6_addr cur_in6_daddr;
286 struct in6_addr cur_in6_saddr;
287 /* For ranges */
288 struct in6_addr min_in6_daddr;
289 struct in6_addr max_in6_daddr;
290 struct in6_addr min_in6_saddr;
291 struct in6_addr max_in6_saddr;
292
293 /* If we're doing ranges, random or incremental, then this
294 * defines the min/max for those ranges.
295 */
296 __be32 saddr_min; /* inclusive, source IP address */
297 __be32 saddr_max; /* exclusive, source IP address */
298 __be32 daddr_min; /* inclusive, dest IP address */
299 __be32 daddr_max; /* exclusive, dest IP address */
300
301 __u16 udp_src_min; /* inclusive, source UDP port */
302 __u16 udp_src_max; /* exclusive, source UDP port */
303 __u16 udp_dst_min; /* inclusive, dest UDP port */
304 __u16 udp_dst_max; /* exclusive, dest UDP port */
305
306 /* DSCP + ECN */
307 __u8 tos; /* six most significant bits of (former) IPv4 TOS are for dscp codepoint */
308 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 (see RFC 3260, sec. 4) */
309
310 /* MPLS */
311 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
312 __be32 labels[MAX_MPLS_LABELS];
313
314 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
315 __u8 vlan_p;
316 __u8 vlan_cfi;
317 __u16 vlan_id; /* 0xffff means no vlan tag */
318
319 __u8 svlan_p;
320 __u8 svlan_cfi;
321 __u16 svlan_id; /* 0xffff means no svlan tag */
322
323 __u32 src_mac_count; /* How many MACs to iterate through */
324 __u32 dst_mac_count; /* How many MACs to iterate through */
325
326 unsigned char dst_mac[ETH_ALEN];
327 unsigned char src_mac[ETH_ALEN];
328
329 __u32 cur_dst_mac_offset;
330 __u32 cur_src_mac_offset;
331 __be32 cur_saddr;
332 __be32 cur_daddr;
333 __u16 cur_udp_dst;
334 __u16 cur_udp_src;
335 __u16 cur_queue_map;
336 __u32 cur_pkt_size;
337
338 __u8 hh[14];
339 /* = {
340 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
341
342 We fill in SRC address later
343 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
344 0x08, 0x00
345 };
346 */
347 __u16 pad; /* pad out the hh struct to an even 16 bytes */
348
349 struct sk_buff *skb; /* skb we are to transmit next, mainly used for when we
350 * are transmitting the same one multiple times
351 */
352 struct net_device *odev; /* The out-going device. Note that the device should
353 * have it's pg_info pointer pointing back to this
354 * device. This will be set when the user specifies
355 * the out-going device name (not when the inject is
356 * started as it used to do.)
357 */
358 struct flow_state *flows;
359 unsigned cflows; /* Concurrent flows (config) */
360 unsigned lflow; /* Flow length (config) */
361 unsigned nflows; /* accumulated flows (stats) */
362 unsigned curfl; /* current sequenced flow (state)*/
363
364 u16 queue_map_min;
365 u16 queue_map_max;
366
367 #ifdef CONFIG_XFRM
368 __u8 ipsmode; /* IPSEC mode (config) */
369 __u8 ipsproto; /* IPSEC type (config) */
370 #endif
371 char result[512];
372 };
373
374 struct pktgen_hdr {
375 __be32 pgh_magic;
376 __be32 seq_num;
377 __be32 tv_sec;
378 __be32 tv_usec;
379 };
380
381 struct pktgen_thread {
382 spinlock_t if_lock;
383 struct list_head if_list; /* All device here */
384 struct list_head th_list;
385 struct task_struct *tsk;
386 char result[512];
387
388 /* Field for thread to receive "posted" events terminate, stop ifs etc. */
389
390 u32 control;
391 int cpu;
392
393 wait_queue_head_t queue;
394 struct completion start_done;
395 };
396
397 #define REMOVE 1
398 #define FIND 0
399
400 /** Convert to micro-seconds */
401 static inline __u64 tv_to_us(const struct timeval *tv)
402 {
403 __u64 us = tv->tv_usec;
404 us += (__u64) tv->tv_sec * (__u64) 1000000;
405 return us;
406 }
407
408 static __u64 getCurUs(void)
409 {
410 struct timeval tv;
411 do_gettimeofday(&tv);
412 return tv_to_us(&tv);
413 }
414
415 /* old include end */
416
417 static const char version[] __initconst = VERSION;
418
419 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
420 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
421 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
422 const char *ifname);
423 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
424 static void pktgen_run_all_threads(void);
425 static void pktgen_reset_all_threads(void);
426 static void pktgen_stop_all_threads_ifs(void);
427
428 static void pktgen_stop(struct pktgen_thread *t);
429 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
430
431 static unsigned int scan_ip6(const char *s, char ip[16]);
432 static unsigned int fmt_ip6(char *s, const char ip[16]);
433
434 /* Module parameters, defaults. */
435 static int pg_count_d __read_mostly = 1000;
436 static int pg_delay_d __read_mostly;
437 static int pg_clone_skb_d __read_mostly;
438 static int debug __read_mostly;
439
440 static DEFINE_MUTEX(pktgen_thread_lock);
441 static LIST_HEAD(pktgen_threads);
442
443 static struct notifier_block pktgen_notifier_block = {
444 .notifier_call = pktgen_device_event,
445 };
446
447 /*
448 * /proc handling functions
449 *
450 */
451
452 static int pgctrl_show(struct seq_file *seq, void *v)
453 {
454 seq_puts(seq, VERSION);
455 return 0;
456 }
457
458 static ssize_t pgctrl_write(struct file *file, const char __user * buf,
459 size_t count, loff_t * ppos)
460 {
461 int err = 0;
462 char data[128];
463
464 if (!capable(CAP_NET_ADMIN)) {
465 err = -EPERM;
466 goto out;
467 }
468
469 if (count > sizeof(data))
470 count = sizeof(data);
471
472 if (copy_from_user(data, buf, count)) {
473 err = -EFAULT;
474 goto out;
475 }
476 data[count - 1] = 0; /* Make string */
477
478 if (!strcmp(data, "stop"))
479 pktgen_stop_all_threads_ifs();
480
481 else if (!strcmp(data, "start"))
482 pktgen_run_all_threads();
483
484 else if (!strcmp(data, "reset"))
485 pktgen_reset_all_threads();
486
487 else
488 printk(KERN_WARNING "pktgen: Unknown command: %s\n", data);
489
490 err = count;
491
492 out:
493 return err;
494 }
495
496 static int pgctrl_open(struct inode *inode, struct file *file)
497 {
498 return single_open(file, pgctrl_show, PDE(inode)->data);
499 }
500
501 static const struct file_operations pktgen_fops = {
502 .owner = THIS_MODULE,
503 .open = pgctrl_open,
504 .read = seq_read,
505 .llseek = seq_lseek,
506 .write = pgctrl_write,
507 .release = single_release,
508 };
509
510 static int pktgen_if_show(struct seq_file *seq, void *v)
511 {
512 const struct pktgen_dev *pkt_dev = seq->private;
513 __u64 sa;
514 __u64 stopped;
515 __u64 now = getCurUs();
516
517 seq_printf(seq,
518 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
519 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
520 pkt_dev->max_pkt_size);
521
522 seq_printf(seq,
523 " frags: %d delay: %u clone_skb: %d ifname: %s\n",
524 pkt_dev->nfrags,
525 1000 * pkt_dev->delay_us + pkt_dev->delay_ns,
526 pkt_dev->clone_skb, pkt_dev->odev->name);
527
528 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
529 pkt_dev->lflow);
530
531 seq_printf(seq,
532 " queue_map_min: %u queue_map_max: %u\n",
533 pkt_dev->queue_map_min,
534 pkt_dev->queue_map_max);
535
536 if (pkt_dev->flags & F_IPV6) {
537 char b1[128], b2[128], b3[128];
538 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
539 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
540 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
541 seq_printf(seq,
542 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
543 b2, b3);
544
545 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
546 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
547 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
548 seq_printf(seq,
549 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
550 b2, b3);
551
552 } else
553 seq_printf(seq,
554 " dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n",
555 pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min,
556 pkt_dev->src_max);
557
558 seq_puts(seq, " src_mac: ");
559
560 seq_printf(seq, "%pM ",
561 is_zero_ether_addr(pkt_dev->src_mac) ?
562 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
563
564 seq_printf(seq, "dst_mac: ");
565 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
566
567 seq_printf(seq,
568 " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n",
569 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
570 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
571
572 seq_printf(seq,
573 " src_mac_count: %d dst_mac_count: %d\n",
574 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
575
576 if (pkt_dev->nr_labels) {
577 unsigned i;
578 seq_printf(seq, " mpls: ");
579 for (i = 0; i < pkt_dev->nr_labels; i++)
580 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
581 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
582 }
583
584 if (pkt_dev->vlan_id != 0xffff) {
585 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
586 pkt_dev->vlan_id, pkt_dev->vlan_p, pkt_dev->vlan_cfi);
587 }
588
589 if (pkt_dev->svlan_id != 0xffff) {
590 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
591 pkt_dev->svlan_id, pkt_dev->svlan_p, pkt_dev->svlan_cfi);
592 }
593
594 if (pkt_dev->tos) {
595 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
596 }
597
598 if (pkt_dev->traffic_class) {
599 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
600 }
601
602 seq_printf(seq, " Flags: ");
603
604 if (pkt_dev->flags & F_IPV6)
605 seq_printf(seq, "IPV6 ");
606
607 if (pkt_dev->flags & F_IPSRC_RND)
608 seq_printf(seq, "IPSRC_RND ");
609
610 if (pkt_dev->flags & F_IPDST_RND)
611 seq_printf(seq, "IPDST_RND ");
612
613 if (pkt_dev->flags & F_TXSIZE_RND)
614 seq_printf(seq, "TXSIZE_RND ");
615
616 if (pkt_dev->flags & F_UDPSRC_RND)
617 seq_printf(seq, "UDPSRC_RND ");
618
619 if (pkt_dev->flags & F_UDPDST_RND)
620 seq_printf(seq, "UDPDST_RND ");
621
622 if (pkt_dev->flags & F_MPLS_RND)
623 seq_printf(seq, "MPLS_RND ");
624
625 if (pkt_dev->flags & F_QUEUE_MAP_RND)
626 seq_printf(seq, "QUEUE_MAP_RND ");
627
628 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
629 seq_printf(seq, "QUEUE_MAP_CPU ");
630
631 if (pkt_dev->cflows) {
632 if (pkt_dev->flags & F_FLOW_SEQ)
633 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
634 else
635 seq_printf(seq, "FLOW_RND ");
636 }
637
638 #ifdef CONFIG_XFRM
639 if (pkt_dev->flags & F_IPSEC_ON)
640 seq_printf(seq, "IPSEC ");
641 #endif
642
643 if (pkt_dev->flags & F_MACSRC_RND)
644 seq_printf(seq, "MACSRC_RND ");
645
646 if (pkt_dev->flags & F_MACDST_RND)
647 seq_printf(seq, "MACDST_RND ");
648
649 if (pkt_dev->flags & F_VID_RND)
650 seq_printf(seq, "VID_RND ");
651
652 if (pkt_dev->flags & F_SVID_RND)
653 seq_printf(seq, "SVID_RND ");
654
655 seq_puts(seq, "\n");
656
657 sa = pkt_dev->started_at;
658 stopped = pkt_dev->stopped_at;
659 if (pkt_dev->running)
660 stopped = now; /* not really stopped, more like last-running-at */
661
662 seq_printf(seq,
663 "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n",
664 (unsigned long long)pkt_dev->sofar,
665 (unsigned long long)pkt_dev->errors, (unsigned long long)sa,
666 (unsigned long long)stopped,
667 (unsigned long long)pkt_dev->idle_acc);
668
669 seq_printf(seq,
670 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
671 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
672 pkt_dev->cur_src_mac_offset);
673
674 if (pkt_dev->flags & F_IPV6) {
675 char b1[128], b2[128];
676 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
677 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
678 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
679 } else
680 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
681 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
682
683 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
684 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
685
686 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
687
688 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
689
690 if (pkt_dev->result[0])
691 seq_printf(seq, "Result: %s\n", pkt_dev->result);
692 else
693 seq_printf(seq, "Result: Idle\n");
694
695 return 0;
696 }
697
698
699 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, __u32 *num)
700 {
701 int i = 0;
702 *num = 0;
703
704 for (; i < maxlen; i++) {
705 char c;
706 *num <<= 4;
707 if (get_user(c, &user_buffer[i]))
708 return -EFAULT;
709 if ((c >= '0') && (c <= '9'))
710 *num |= c - '0';
711 else if ((c >= 'a') && (c <= 'f'))
712 *num |= c - 'a' + 10;
713 else if ((c >= 'A') && (c <= 'F'))
714 *num |= c - 'A' + 10;
715 else
716 break;
717 }
718 return i;
719 }
720
721 static int count_trail_chars(const char __user * user_buffer,
722 unsigned int maxlen)
723 {
724 int i;
725
726 for (i = 0; i < maxlen; i++) {
727 char c;
728 if (get_user(c, &user_buffer[i]))
729 return -EFAULT;
730 switch (c) {
731 case '\"':
732 case '\n':
733 case '\r':
734 case '\t':
735 case ' ':
736 case '=':
737 break;
738 default:
739 goto done;
740 }
741 }
742 done:
743 return i;
744 }
745
746 static unsigned long num_arg(const char __user * user_buffer,
747 unsigned long maxlen, unsigned long *num)
748 {
749 int i = 0;
750 *num = 0;
751
752 for (; i < maxlen; i++) {
753 char c;
754 if (get_user(c, &user_buffer[i]))
755 return -EFAULT;
756 if ((c >= '0') && (c <= '9')) {
757 *num *= 10;
758 *num += c - '0';
759 } else
760 break;
761 }
762 return i;
763 }
764
765 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
766 {
767 int i = 0;
768
769 for (; i < maxlen; i++) {
770 char c;
771 if (get_user(c, &user_buffer[i]))
772 return -EFAULT;
773 switch (c) {
774 case '\"':
775 case '\n':
776 case '\r':
777 case '\t':
778 case ' ':
779 goto done_str;
780 break;
781 default:
782 break;
783 }
784 }
785 done_str:
786 return i;
787 }
788
789 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
790 {
791 unsigned n = 0;
792 char c;
793 ssize_t i = 0;
794 int len;
795
796 pkt_dev->nr_labels = 0;
797 do {
798 __u32 tmp;
799 len = hex32_arg(&buffer[i], 8, &tmp);
800 if (len <= 0)
801 return len;
802 pkt_dev->labels[n] = htonl(tmp);
803 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
804 pkt_dev->flags |= F_MPLS_RND;
805 i += len;
806 if (get_user(c, &buffer[i]))
807 return -EFAULT;
808 i++;
809 n++;
810 if (n >= MAX_MPLS_LABELS)
811 return -E2BIG;
812 } while (c == ',');
813
814 pkt_dev->nr_labels = n;
815 return i;
816 }
817
818 static ssize_t pktgen_if_write(struct file *file,
819 const char __user * user_buffer, size_t count,
820 loff_t * offset)
821 {
822 struct seq_file *seq = (struct seq_file *)file->private_data;
823 struct pktgen_dev *pkt_dev = seq->private;
824 int i = 0, max, len;
825 char name[16], valstr[32];
826 unsigned long value = 0;
827 char *pg_result = NULL;
828 int tmp = 0;
829 char buf[128];
830
831 pg_result = &(pkt_dev->result[0]);
832
833 if (count < 1) {
834 printk(KERN_WARNING "pktgen: wrong command format\n");
835 return -EINVAL;
836 }
837
838 max = count - i;
839 tmp = count_trail_chars(&user_buffer[i], max);
840 if (tmp < 0) {
841 printk(KERN_WARNING "pktgen: illegal format\n");
842 return tmp;
843 }
844 i += tmp;
845
846 /* Read variable name */
847
848 len = strn_len(&user_buffer[i], sizeof(name) - 1);
849 if (len < 0) {
850 return len;
851 }
852 memset(name, 0, sizeof(name));
853 if (copy_from_user(name, &user_buffer[i], len))
854 return -EFAULT;
855 i += len;
856
857 max = count - i;
858 len = count_trail_chars(&user_buffer[i], max);
859 if (len < 0)
860 return len;
861
862 i += len;
863
864 if (debug) {
865 char tb[count + 1];
866 if (copy_from_user(tb, user_buffer, count))
867 return -EFAULT;
868 tb[count] = 0;
869 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name,
870 (unsigned long)count, tb);
871 }
872
873 if (!strcmp(name, "min_pkt_size")) {
874 len = num_arg(&user_buffer[i], 10, &value);
875 if (len < 0) {
876 return len;
877 }
878 i += len;
879 if (value < 14 + 20 + 8)
880 value = 14 + 20 + 8;
881 if (value != pkt_dev->min_pkt_size) {
882 pkt_dev->min_pkt_size = value;
883 pkt_dev->cur_pkt_size = value;
884 }
885 sprintf(pg_result, "OK: min_pkt_size=%u",
886 pkt_dev->min_pkt_size);
887 return count;
888 }
889
890 if (!strcmp(name, "max_pkt_size")) {
891 len = num_arg(&user_buffer[i], 10, &value);
892 if (len < 0) {
893 return len;
894 }
895 i += len;
896 if (value < 14 + 20 + 8)
897 value = 14 + 20 + 8;
898 if (value != pkt_dev->max_pkt_size) {
899 pkt_dev->max_pkt_size = value;
900 pkt_dev->cur_pkt_size = value;
901 }
902 sprintf(pg_result, "OK: max_pkt_size=%u",
903 pkt_dev->max_pkt_size);
904 return count;
905 }
906
907 /* Shortcut for min = max */
908
909 if (!strcmp(name, "pkt_size")) {
910 len = num_arg(&user_buffer[i], 10, &value);
911 if (len < 0) {
912 return len;
913 }
914 i += len;
915 if (value < 14 + 20 + 8)
916 value = 14 + 20 + 8;
917 if (value != pkt_dev->min_pkt_size) {
918 pkt_dev->min_pkt_size = value;
919 pkt_dev->max_pkt_size = value;
920 pkt_dev->cur_pkt_size = value;
921 }
922 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
923 return count;
924 }
925
926 if (!strcmp(name, "debug")) {
927 len = num_arg(&user_buffer[i], 10, &value);
928 if (len < 0) {
929 return len;
930 }
931 i += len;
932 debug = value;
933 sprintf(pg_result, "OK: debug=%u", debug);
934 return count;
935 }
936
937 if (!strcmp(name, "frags")) {
938 len = num_arg(&user_buffer[i], 10, &value);
939 if (len < 0) {
940 return len;
941 }
942 i += len;
943 pkt_dev->nfrags = value;
944 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
945 return count;
946 }
947 if (!strcmp(name, "delay")) {
948 len = num_arg(&user_buffer[i], 10, &value);
949 if (len < 0) {
950 return len;
951 }
952 i += len;
953 if (value == 0x7FFFFFFF) {
954 pkt_dev->delay_us = 0x7FFFFFFF;
955 pkt_dev->delay_ns = 0;
956 } else {
957 pkt_dev->delay_us = value / 1000;
958 pkt_dev->delay_ns = value % 1000;
959 }
960 sprintf(pg_result, "OK: delay=%u",
961 1000 * pkt_dev->delay_us + pkt_dev->delay_ns);
962 return count;
963 }
964 if (!strcmp(name, "udp_src_min")) {
965 len = num_arg(&user_buffer[i], 10, &value);
966 if (len < 0) {
967 return len;
968 }
969 i += len;
970 if (value != pkt_dev->udp_src_min) {
971 pkt_dev->udp_src_min = value;
972 pkt_dev->cur_udp_src = value;
973 }
974 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
975 return count;
976 }
977 if (!strcmp(name, "udp_dst_min")) {
978 len = num_arg(&user_buffer[i], 10, &value);
979 if (len < 0) {
980 return len;
981 }
982 i += len;
983 if (value != pkt_dev->udp_dst_min) {
984 pkt_dev->udp_dst_min = value;
985 pkt_dev->cur_udp_dst = value;
986 }
987 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
988 return count;
989 }
990 if (!strcmp(name, "udp_src_max")) {
991 len = num_arg(&user_buffer[i], 10, &value);
992 if (len < 0) {
993 return len;
994 }
995 i += len;
996 if (value != pkt_dev->udp_src_max) {
997 pkt_dev->udp_src_max = value;
998 pkt_dev->cur_udp_src = value;
999 }
1000 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1001 return count;
1002 }
1003 if (!strcmp(name, "udp_dst_max")) {
1004 len = num_arg(&user_buffer[i], 10, &value);
1005 if (len < 0) {
1006 return len;
1007 }
1008 i += len;
1009 if (value != pkt_dev->udp_dst_max) {
1010 pkt_dev->udp_dst_max = value;
1011 pkt_dev->cur_udp_dst = value;
1012 }
1013 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1014 return count;
1015 }
1016 if (!strcmp(name, "clone_skb")) {
1017 len = num_arg(&user_buffer[i], 10, &value);
1018 if (len < 0) {
1019 return len;
1020 }
1021 i += len;
1022 pkt_dev->clone_skb = value;
1023
1024 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1025 return count;
1026 }
1027 if (!strcmp(name, "count")) {
1028 len = num_arg(&user_buffer[i], 10, &value);
1029 if (len < 0) {
1030 return len;
1031 }
1032 i += len;
1033 pkt_dev->count = value;
1034 sprintf(pg_result, "OK: count=%llu",
1035 (unsigned long long)pkt_dev->count);
1036 return count;
1037 }
1038 if (!strcmp(name, "src_mac_count")) {
1039 len = num_arg(&user_buffer[i], 10, &value);
1040 if (len < 0) {
1041 return len;
1042 }
1043 i += len;
1044 if (pkt_dev->src_mac_count != value) {
1045 pkt_dev->src_mac_count = value;
1046 pkt_dev->cur_src_mac_offset = 0;
1047 }
1048 sprintf(pg_result, "OK: src_mac_count=%d",
1049 pkt_dev->src_mac_count);
1050 return count;
1051 }
1052 if (!strcmp(name, "dst_mac_count")) {
1053 len = num_arg(&user_buffer[i], 10, &value);
1054 if (len < 0) {
1055 return len;
1056 }
1057 i += len;
1058 if (pkt_dev->dst_mac_count != value) {
1059 pkt_dev->dst_mac_count = value;
1060 pkt_dev->cur_dst_mac_offset = 0;
1061 }
1062 sprintf(pg_result, "OK: dst_mac_count=%d",
1063 pkt_dev->dst_mac_count);
1064 return count;
1065 }
1066 if (!strcmp(name, "flag")) {
1067 char f[32];
1068 memset(f, 0, 32);
1069 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1070 if (len < 0) {
1071 return len;
1072 }
1073 if (copy_from_user(f, &user_buffer[i], len))
1074 return -EFAULT;
1075 i += len;
1076 if (strcmp(f, "IPSRC_RND") == 0)
1077 pkt_dev->flags |= F_IPSRC_RND;
1078
1079 else if (strcmp(f, "!IPSRC_RND") == 0)
1080 pkt_dev->flags &= ~F_IPSRC_RND;
1081
1082 else if (strcmp(f, "TXSIZE_RND") == 0)
1083 pkt_dev->flags |= F_TXSIZE_RND;
1084
1085 else if (strcmp(f, "!TXSIZE_RND") == 0)
1086 pkt_dev->flags &= ~F_TXSIZE_RND;
1087
1088 else if (strcmp(f, "IPDST_RND") == 0)
1089 pkt_dev->flags |= F_IPDST_RND;
1090
1091 else if (strcmp(f, "!IPDST_RND") == 0)
1092 pkt_dev->flags &= ~F_IPDST_RND;
1093
1094 else if (strcmp(f, "UDPSRC_RND") == 0)
1095 pkt_dev->flags |= F_UDPSRC_RND;
1096
1097 else if (strcmp(f, "!UDPSRC_RND") == 0)
1098 pkt_dev->flags &= ~F_UDPSRC_RND;
1099
1100 else if (strcmp(f, "UDPDST_RND") == 0)
1101 pkt_dev->flags |= F_UDPDST_RND;
1102
1103 else if (strcmp(f, "!UDPDST_RND") == 0)
1104 pkt_dev->flags &= ~F_UDPDST_RND;
1105
1106 else if (strcmp(f, "MACSRC_RND") == 0)
1107 pkt_dev->flags |= F_MACSRC_RND;
1108
1109 else if (strcmp(f, "!MACSRC_RND") == 0)
1110 pkt_dev->flags &= ~F_MACSRC_RND;
1111
1112 else if (strcmp(f, "MACDST_RND") == 0)
1113 pkt_dev->flags |= F_MACDST_RND;
1114
1115 else if (strcmp(f, "!MACDST_RND") == 0)
1116 pkt_dev->flags &= ~F_MACDST_RND;
1117
1118 else if (strcmp(f, "MPLS_RND") == 0)
1119 pkt_dev->flags |= F_MPLS_RND;
1120
1121 else if (strcmp(f, "!MPLS_RND") == 0)
1122 pkt_dev->flags &= ~F_MPLS_RND;
1123
1124 else if (strcmp(f, "VID_RND") == 0)
1125 pkt_dev->flags |= F_VID_RND;
1126
1127 else if (strcmp(f, "!VID_RND") == 0)
1128 pkt_dev->flags &= ~F_VID_RND;
1129
1130 else if (strcmp(f, "SVID_RND") == 0)
1131 pkt_dev->flags |= F_SVID_RND;
1132
1133 else if (strcmp(f, "!SVID_RND") == 0)
1134 pkt_dev->flags &= ~F_SVID_RND;
1135
1136 else if (strcmp(f, "FLOW_SEQ") == 0)
1137 pkt_dev->flags |= F_FLOW_SEQ;
1138
1139 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1140 pkt_dev->flags |= F_QUEUE_MAP_RND;
1141
1142 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1143 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1144
1145 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1146 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1147
1148 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1149 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1150 #ifdef CONFIG_XFRM
1151 else if (strcmp(f, "IPSEC") == 0)
1152 pkt_dev->flags |= F_IPSEC_ON;
1153 #endif
1154
1155 else if (strcmp(f, "!IPV6") == 0)
1156 pkt_dev->flags &= ~F_IPV6;
1157
1158 else {
1159 sprintf(pg_result,
1160 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1161 f,
1162 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1163 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC\n");
1164 return count;
1165 }
1166 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1167 return count;
1168 }
1169 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1170 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1171 if (len < 0) {
1172 return len;
1173 }
1174
1175 if (copy_from_user(buf, &user_buffer[i], len))
1176 return -EFAULT;
1177 buf[len] = 0;
1178 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1179 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1180 strncpy(pkt_dev->dst_min, buf, len);
1181 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1182 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1183 }
1184 if (debug)
1185 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1186 pkt_dev->dst_min);
1187 i += len;
1188 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1189 return count;
1190 }
1191 if (!strcmp(name, "dst_max")) {
1192 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1193 if (len < 0) {
1194 return len;
1195 }
1196
1197 if (copy_from_user(buf, &user_buffer[i], len))
1198 return -EFAULT;
1199
1200 buf[len] = 0;
1201 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1202 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1203 strncpy(pkt_dev->dst_max, buf, len);
1204 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1205 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1206 }
1207 if (debug)
1208 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1209 pkt_dev->dst_max);
1210 i += len;
1211 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1212 return count;
1213 }
1214 if (!strcmp(name, "dst6")) {
1215 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1216 if (len < 0)
1217 return len;
1218
1219 pkt_dev->flags |= F_IPV6;
1220
1221 if (copy_from_user(buf, &user_buffer[i], len))
1222 return -EFAULT;
1223 buf[len] = 0;
1224
1225 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1226 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1227
1228 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1229
1230 if (debug)
1231 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1232
1233 i += len;
1234 sprintf(pg_result, "OK: dst6=%s", buf);
1235 return count;
1236 }
1237 if (!strcmp(name, "dst6_min")) {
1238 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1239 if (len < 0)
1240 return len;
1241
1242 pkt_dev->flags |= F_IPV6;
1243
1244 if (copy_from_user(buf, &user_buffer[i], len))
1245 return -EFAULT;
1246 buf[len] = 0;
1247
1248 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1249 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1250
1251 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1252 &pkt_dev->min_in6_daddr);
1253 if (debug)
1254 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1255
1256 i += len;
1257 sprintf(pg_result, "OK: dst6_min=%s", buf);
1258 return count;
1259 }
1260 if (!strcmp(name, "dst6_max")) {
1261 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1262 if (len < 0)
1263 return len;
1264
1265 pkt_dev->flags |= F_IPV6;
1266
1267 if (copy_from_user(buf, &user_buffer[i], len))
1268 return -EFAULT;
1269 buf[len] = 0;
1270
1271 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1272 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1273
1274 if (debug)
1275 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1276
1277 i += len;
1278 sprintf(pg_result, "OK: dst6_max=%s", buf);
1279 return count;
1280 }
1281 if (!strcmp(name, "src6")) {
1282 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1283 if (len < 0)
1284 return len;
1285
1286 pkt_dev->flags |= F_IPV6;
1287
1288 if (copy_from_user(buf, &user_buffer[i], len))
1289 return -EFAULT;
1290 buf[len] = 0;
1291
1292 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1293 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1294
1295 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1296
1297 if (debug)
1298 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1299
1300 i += len;
1301 sprintf(pg_result, "OK: src6=%s", buf);
1302 return count;
1303 }
1304 if (!strcmp(name, "src_min")) {
1305 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1306 if (len < 0) {
1307 return len;
1308 }
1309 if (copy_from_user(buf, &user_buffer[i], len))
1310 return -EFAULT;
1311 buf[len] = 0;
1312 if (strcmp(buf, pkt_dev->src_min) != 0) {
1313 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1314 strncpy(pkt_dev->src_min, buf, len);
1315 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1316 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1317 }
1318 if (debug)
1319 printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1320 pkt_dev->src_min);
1321 i += len;
1322 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1323 return count;
1324 }
1325 if (!strcmp(name, "src_max")) {
1326 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1327 if (len < 0) {
1328 return len;
1329 }
1330 if (copy_from_user(buf, &user_buffer[i], len))
1331 return -EFAULT;
1332 buf[len] = 0;
1333 if (strcmp(buf, pkt_dev->src_max) != 0) {
1334 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1335 strncpy(pkt_dev->src_max, buf, len);
1336 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1337 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1338 }
1339 if (debug)
1340 printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1341 pkt_dev->src_max);
1342 i += len;
1343 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1344 return count;
1345 }
1346 if (!strcmp(name, "dst_mac")) {
1347 char *v = valstr;
1348 unsigned char old_dmac[ETH_ALEN];
1349 unsigned char *m = pkt_dev->dst_mac;
1350 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1351
1352 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1353 if (len < 0) {
1354 return len;
1355 }
1356 memset(valstr, 0, sizeof(valstr));
1357 if (copy_from_user(valstr, &user_buffer[i], len))
1358 return -EFAULT;
1359 i += len;
1360
1361 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1362 if (*v >= '0' && *v <= '9') {
1363 *m *= 16;
1364 *m += *v - '0';
1365 }
1366 if (*v >= 'A' && *v <= 'F') {
1367 *m *= 16;
1368 *m += *v - 'A' + 10;
1369 }
1370 if (*v >= 'a' && *v <= 'f') {
1371 *m *= 16;
1372 *m += *v - 'a' + 10;
1373 }
1374 if (*v == ':') {
1375 m++;
1376 *m = 0;
1377 }
1378 }
1379
1380 /* Set up Dest MAC */
1381 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1382 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1383
1384 sprintf(pg_result, "OK: dstmac");
1385 return count;
1386 }
1387 if (!strcmp(name, "src_mac")) {
1388 char *v = valstr;
1389 unsigned char old_smac[ETH_ALEN];
1390 unsigned char *m = pkt_dev->src_mac;
1391
1392 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN);
1393
1394 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1395 if (len < 0) {
1396 return len;
1397 }
1398 memset(valstr, 0, sizeof(valstr));
1399 if (copy_from_user(valstr, &user_buffer[i], len))
1400 return -EFAULT;
1401 i += len;
1402
1403 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1404 if (*v >= '0' && *v <= '9') {
1405 *m *= 16;
1406 *m += *v - '0';
1407 }
1408 if (*v >= 'A' && *v <= 'F') {
1409 *m *= 16;
1410 *m += *v - 'A' + 10;
1411 }
1412 if (*v >= 'a' && *v <= 'f') {
1413 *m *= 16;
1414 *m += *v - 'a' + 10;
1415 }
1416 if (*v == ':') {
1417 m++;
1418 *m = 0;
1419 }
1420 }
1421
1422 /* Set up Src MAC */
1423 if (compare_ether_addr(old_smac, pkt_dev->src_mac))
1424 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN);
1425
1426 sprintf(pg_result, "OK: srcmac");
1427 return count;
1428 }
1429
1430 if (!strcmp(name, "clear_counters")) {
1431 pktgen_clear_counters(pkt_dev);
1432 sprintf(pg_result, "OK: Clearing counters.\n");
1433 return count;
1434 }
1435
1436 if (!strcmp(name, "flows")) {
1437 len = num_arg(&user_buffer[i], 10, &value);
1438 if (len < 0) {
1439 return len;
1440 }
1441 i += len;
1442 if (value > MAX_CFLOWS)
1443 value = MAX_CFLOWS;
1444
1445 pkt_dev->cflows = value;
1446 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1447 return count;
1448 }
1449
1450 if (!strcmp(name, "flowlen")) {
1451 len = num_arg(&user_buffer[i], 10, &value);
1452 if (len < 0) {
1453 return len;
1454 }
1455 i += len;
1456 pkt_dev->lflow = value;
1457 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1458 return count;
1459 }
1460
1461 if (!strcmp(name, "queue_map_min")) {
1462 len = num_arg(&user_buffer[i], 5, &value);
1463 if (len < 0) {
1464 return len;
1465 }
1466 i += len;
1467 pkt_dev->queue_map_min = value;
1468 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1469 return count;
1470 }
1471
1472 if (!strcmp(name, "queue_map_max")) {
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_max = value;
1479 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1480 return count;
1481 }
1482
1483 if (!strcmp(name, "mpls")) {
1484 unsigned n, cnt;
1485
1486 len = get_labels(&user_buffer[i], pkt_dev);
1487 if (len < 0)
1488 return len;
1489 i += len;
1490 cnt = sprintf(pg_result, "OK: mpls=");
1491 for (n = 0; n < pkt_dev->nr_labels; n++)
1492 cnt += sprintf(pg_result + cnt,
1493 "%08x%s", ntohl(pkt_dev->labels[n]),
1494 n == pkt_dev->nr_labels-1 ? "" : ",");
1495
1496 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1497 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1498 pkt_dev->svlan_id = 0xffff;
1499
1500 if (debug)
1501 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1502 }
1503 return count;
1504 }
1505
1506 if (!strcmp(name, "vlan_id")) {
1507 len = num_arg(&user_buffer[i], 4, &value);
1508 if (len < 0) {
1509 return len;
1510 }
1511 i += len;
1512 if (value <= 4095) {
1513 pkt_dev->vlan_id = value; /* turn on VLAN */
1514
1515 if (debug)
1516 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1517
1518 if (debug && pkt_dev->nr_labels)
1519 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1520
1521 pkt_dev->nr_labels = 0; /* turn off MPLS */
1522 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1523 } else {
1524 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1525 pkt_dev->svlan_id = 0xffff;
1526
1527 if (debug)
1528 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1529 }
1530 return count;
1531 }
1532
1533 if (!strcmp(name, "vlan_p")) {
1534 len = num_arg(&user_buffer[i], 1, &value);
1535 if (len < 0) {
1536 return len;
1537 }
1538 i += len;
1539 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1540 pkt_dev->vlan_p = value;
1541 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1542 } else {
1543 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1544 }
1545 return count;
1546 }
1547
1548 if (!strcmp(name, "vlan_cfi")) {
1549 len = num_arg(&user_buffer[i], 1, &value);
1550 if (len < 0) {
1551 return len;
1552 }
1553 i += len;
1554 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1555 pkt_dev->vlan_cfi = value;
1556 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1557 } else {
1558 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1559 }
1560 return count;
1561 }
1562
1563 if (!strcmp(name, "svlan_id")) {
1564 len = num_arg(&user_buffer[i], 4, &value);
1565 if (len < 0) {
1566 return len;
1567 }
1568 i += len;
1569 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1570 pkt_dev->svlan_id = value; /* turn on SVLAN */
1571
1572 if (debug)
1573 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1574
1575 if (debug && pkt_dev->nr_labels)
1576 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1577
1578 pkt_dev->nr_labels = 0; /* turn off MPLS */
1579 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1580 } else {
1581 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1582 pkt_dev->svlan_id = 0xffff;
1583
1584 if (debug)
1585 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1586 }
1587 return count;
1588 }
1589
1590 if (!strcmp(name, "svlan_p")) {
1591 len = num_arg(&user_buffer[i], 1, &value);
1592 if (len < 0) {
1593 return len;
1594 }
1595 i += len;
1596 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1597 pkt_dev->svlan_p = value;
1598 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1599 } else {
1600 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1601 }
1602 return count;
1603 }
1604
1605 if (!strcmp(name, "svlan_cfi")) {
1606 len = num_arg(&user_buffer[i], 1, &value);
1607 if (len < 0) {
1608 return len;
1609 }
1610 i += len;
1611 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1612 pkt_dev->svlan_cfi = value;
1613 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1614 } else {
1615 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1616 }
1617 return count;
1618 }
1619
1620 if (!strcmp(name, "tos")) {
1621 __u32 tmp_value = 0;
1622 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1623 if (len < 0) {
1624 return len;
1625 }
1626 i += len;
1627 if (len == 2) {
1628 pkt_dev->tos = tmp_value;
1629 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1630 } else {
1631 sprintf(pg_result, "ERROR: tos must be 00-ff");
1632 }
1633 return count;
1634 }
1635
1636 if (!strcmp(name, "traffic_class")) {
1637 __u32 tmp_value = 0;
1638 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1639 if (len < 0) {
1640 return len;
1641 }
1642 i += len;
1643 if (len == 2) {
1644 pkt_dev->traffic_class = tmp_value;
1645 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1646 } else {
1647 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1648 }
1649 return count;
1650 }
1651
1652 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1653 return -EINVAL;
1654 }
1655
1656 static int pktgen_if_open(struct inode *inode, struct file *file)
1657 {
1658 return single_open(file, pktgen_if_show, PDE(inode)->data);
1659 }
1660
1661 static const struct file_operations pktgen_if_fops = {
1662 .owner = THIS_MODULE,
1663 .open = pktgen_if_open,
1664 .read = seq_read,
1665 .llseek = seq_lseek,
1666 .write = pktgen_if_write,
1667 .release = single_release,
1668 };
1669
1670 static int pktgen_thread_show(struct seq_file *seq, void *v)
1671 {
1672 struct pktgen_thread *t = seq->private;
1673 const struct pktgen_dev *pkt_dev;
1674
1675 BUG_ON(!t);
1676
1677 seq_printf(seq, "Running: ");
1678
1679 if_lock(t);
1680 list_for_each_entry(pkt_dev, &t->if_list, list)
1681 if (pkt_dev->running)
1682 seq_printf(seq, "%s ", pkt_dev->odev->name);
1683
1684 seq_printf(seq, "\nStopped: ");
1685
1686 list_for_each_entry(pkt_dev, &t->if_list, list)
1687 if (!pkt_dev->running)
1688 seq_printf(seq, "%s ", pkt_dev->odev->name);
1689
1690 if (t->result[0])
1691 seq_printf(seq, "\nResult: %s\n", t->result);
1692 else
1693 seq_printf(seq, "\nResult: NA\n");
1694
1695 if_unlock(t);
1696
1697 return 0;
1698 }
1699
1700 static ssize_t pktgen_thread_write(struct file *file,
1701 const char __user * user_buffer,
1702 size_t count, loff_t * offset)
1703 {
1704 struct seq_file *seq = (struct seq_file *)file->private_data;
1705 struct pktgen_thread *t = seq->private;
1706 int i = 0, max, len, ret;
1707 char name[40];
1708 char *pg_result;
1709
1710 if (count < 1) {
1711 // sprintf(pg_result, "Wrong command format");
1712 return -EINVAL;
1713 }
1714
1715 max = count - i;
1716 len = count_trail_chars(&user_buffer[i], max);
1717 if (len < 0)
1718 return len;
1719
1720 i += len;
1721
1722 /* Read variable name */
1723
1724 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1725 if (len < 0)
1726 return len;
1727
1728 memset(name, 0, sizeof(name));
1729 if (copy_from_user(name, &user_buffer[i], len))
1730 return -EFAULT;
1731 i += len;
1732
1733 max = count - i;
1734 len = count_trail_chars(&user_buffer[i], max);
1735 if (len < 0)
1736 return len;
1737
1738 i += len;
1739
1740 if (debug)
1741 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1742 name, (unsigned long)count);
1743
1744 if (!t) {
1745 printk(KERN_ERR "pktgen: ERROR: No thread\n");
1746 ret = -EINVAL;
1747 goto out;
1748 }
1749
1750 pg_result = &(t->result[0]);
1751
1752 if (!strcmp(name, "add_device")) {
1753 char f[32];
1754 memset(f, 0, 32);
1755 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1756 if (len < 0) {
1757 ret = len;
1758 goto out;
1759 }
1760 if (copy_from_user(f, &user_buffer[i], len))
1761 return -EFAULT;
1762 i += len;
1763 mutex_lock(&pktgen_thread_lock);
1764 pktgen_add_device(t, f);
1765 mutex_unlock(&pktgen_thread_lock);
1766 ret = count;
1767 sprintf(pg_result, "OK: add_device=%s", f);
1768 goto out;
1769 }
1770
1771 if (!strcmp(name, "rem_device_all")) {
1772 mutex_lock(&pktgen_thread_lock);
1773 t->control |= T_REMDEVALL;
1774 mutex_unlock(&pktgen_thread_lock);
1775 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1776 ret = count;
1777 sprintf(pg_result, "OK: rem_device_all");
1778 goto out;
1779 }
1780
1781 if (!strcmp(name, "max_before_softirq")) {
1782 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1783 ret = count;
1784 goto out;
1785 }
1786
1787 ret = -EINVAL;
1788 out:
1789 return ret;
1790 }
1791
1792 static int pktgen_thread_open(struct inode *inode, struct file *file)
1793 {
1794 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1795 }
1796
1797 static const struct file_operations pktgen_thread_fops = {
1798 .owner = THIS_MODULE,
1799 .open = pktgen_thread_open,
1800 .read = seq_read,
1801 .llseek = seq_lseek,
1802 .write = pktgen_thread_write,
1803 .release = single_release,
1804 };
1805
1806 /* Think find or remove for NN */
1807 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1808 {
1809 struct pktgen_thread *t;
1810 struct pktgen_dev *pkt_dev = NULL;
1811
1812 list_for_each_entry(t, &pktgen_threads, th_list) {
1813 pkt_dev = pktgen_find_dev(t, ifname);
1814 if (pkt_dev) {
1815 if (remove) {
1816 if_lock(t);
1817 pkt_dev->removal_mark = 1;
1818 t->control |= T_REMDEV;
1819 if_unlock(t);
1820 }
1821 break;
1822 }
1823 }
1824 return pkt_dev;
1825 }
1826
1827 /*
1828 * mark a device for removal
1829 */
1830 static void pktgen_mark_device(const char *ifname)
1831 {
1832 struct pktgen_dev *pkt_dev = NULL;
1833 const int max_tries = 10, msec_per_try = 125;
1834 int i = 0;
1835
1836 mutex_lock(&pktgen_thread_lock);
1837 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname);
1838
1839 while (1) {
1840
1841 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1842 if (pkt_dev == NULL)
1843 break; /* success */
1844
1845 mutex_unlock(&pktgen_thread_lock);
1846 pr_debug("pktgen: pktgen_mark_device waiting for %s "
1847 "to disappear....\n", ifname);
1848 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1849 mutex_lock(&pktgen_thread_lock);
1850
1851 if (++i >= max_tries) {
1852 printk(KERN_ERR "pktgen_mark_device: timed out after "
1853 "waiting %d msec for device %s to be removed\n",
1854 msec_per_try * i, ifname);
1855 break;
1856 }
1857
1858 }
1859
1860 mutex_unlock(&pktgen_thread_lock);
1861 }
1862
1863 static void pktgen_change_name(struct net_device *dev)
1864 {
1865 struct pktgen_thread *t;
1866
1867 list_for_each_entry(t, &pktgen_threads, th_list) {
1868 struct pktgen_dev *pkt_dev;
1869
1870 list_for_each_entry(pkt_dev, &t->if_list, list) {
1871 if (pkt_dev->odev != dev)
1872 continue;
1873
1874 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1875
1876 pkt_dev->entry = create_proc_entry(dev->name, 0600,
1877 pg_proc_dir);
1878 if (!pkt_dev->entry)
1879 printk(KERN_ERR "pktgen: can't move proc "
1880 " entry for '%s'\n", dev->name);
1881 break;
1882 }
1883 }
1884 }
1885
1886 static int pktgen_device_event(struct notifier_block *unused,
1887 unsigned long event, void *ptr)
1888 {
1889 struct net_device *dev = ptr;
1890
1891 if (!net_eq(dev_net(dev), &init_net))
1892 return NOTIFY_DONE;
1893
1894 /* It is OK that we do not hold the group lock right now,
1895 * as we run under the RTNL lock.
1896 */
1897
1898 switch (event) {
1899 case NETDEV_CHANGENAME:
1900 pktgen_change_name(dev);
1901 break;
1902
1903 case NETDEV_UNREGISTER:
1904 pktgen_mark_device(dev->name);
1905 break;
1906 }
1907
1908 return NOTIFY_DONE;
1909 }
1910
1911 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev, const char *ifname)
1912 {
1913 char b[IFNAMSIZ+5];
1914 int i = 0;
1915
1916 for(i=0; ifname[i] != '@'; i++) {
1917 if(i == IFNAMSIZ)
1918 break;
1919
1920 b[i] = ifname[i];
1921 }
1922 b[i] = 0;
1923
1924 return dev_get_by_name(&init_net, b);
1925 }
1926
1927
1928 /* Associate pktgen_dev with a device. */
1929
1930 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1931 {
1932 struct net_device *odev;
1933 int err;
1934
1935 /* Clean old setups */
1936 if (pkt_dev->odev) {
1937 dev_put(pkt_dev->odev);
1938 pkt_dev->odev = NULL;
1939 }
1940
1941 odev = pktgen_dev_get_by_name(pkt_dev, ifname);
1942 if (!odev) {
1943 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname);
1944 return -ENODEV;
1945 }
1946
1947 if (odev->type != ARPHRD_ETHER) {
1948 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname);
1949 err = -EINVAL;
1950 } else if (!netif_running(odev)) {
1951 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname);
1952 err = -ENETDOWN;
1953 } else {
1954 pkt_dev->odev = odev;
1955 return 0;
1956 }
1957
1958 dev_put(odev);
1959 return err;
1960 }
1961
1962 /* Read pkt_dev from the interface and set up internal pktgen_dev
1963 * structure to have the right information to create/send packets
1964 */
1965 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
1966 {
1967 int ntxq;
1968
1969 if (!pkt_dev->odev) {
1970 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in "
1971 "setup_inject.\n");
1972 sprintf(pkt_dev->result,
1973 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1974 return;
1975 }
1976
1977 /* make sure that we don't pick a non-existing transmit queue */
1978 ntxq = pkt_dev->odev->real_num_tx_queues;
1979
1980 if (ntxq <= pkt_dev->queue_map_min) {
1981 printk(KERN_WARNING "pktgen: WARNING: Requested "
1982 "queue_map_min (zero-based) (%d) exceeds valid range "
1983 "[0 - %d] for (%d) queues on %s, resetting\n",
1984 pkt_dev->queue_map_min, (ntxq ?: 1)- 1, ntxq,
1985 pkt_dev->odev->name);
1986 pkt_dev->queue_map_min = ntxq - 1;
1987 }
1988 if (pkt_dev->queue_map_max >= ntxq) {
1989 printk(KERN_WARNING "pktgen: WARNING: Requested "
1990 "queue_map_max (zero-based) (%d) exceeds valid range "
1991 "[0 - %d] for (%d) queues on %s, resetting\n",
1992 pkt_dev->queue_map_max, (ntxq ?: 1)- 1, ntxq,
1993 pkt_dev->odev->name);
1994 pkt_dev->queue_map_max = ntxq - 1;
1995 }
1996
1997 /* Default to the interface's mac if not explicitly set. */
1998
1999 if (is_zero_ether_addr(pkt_dev->src_mac))
2000 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2001
2002 /* Set up Dest MAC */
2003 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2004
2005 /* Set up pkt size */
2006 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2007
2008 if (pkt_dev->flags & F_IPV6) {
2009 /*
2010 * Skip this automatic address setting until locks or functions
2011 * gets exported
2012 */
2013
2014 #ifdef NOTNOW
2015 int i, set = 0, err = 1;
2016 struct inet6_dev *idev;
2017
2018 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2019 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2020 set = 1;
2021 break;
2022 }
2023
2024 if (!set) {
2025
2026 /*
2027 * Use linklevel address if unconfigured.
2028 *
2029 * use ipv6_get_lladdr if/when it's get exported
2030 */
2031
2032 rcu_read_lock();
2033 if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) {
2034 struct inet6_ifaddr *ifp;
2035
2036 read_lock_bh(&idev->lock);
2037 for (ifp = idev->addr_list; ifp;
2038 ifp = ifp->if_next) {
2039 if (ifp->scope == IFA_LINK
2040 && !(ifp->
2041 flags & IFA_F_TENTATIVE)) {
2042 ipv6_addr_copy(&pkt_dev->
2043 cur_in6_saddr,
2044 &ifp->addr);
2045 err = 0;
2046 break;
2047 }
2048 }
2049 read_unlock_bh(&idev->lock);
2050 }
2051 rcu_read_unlock();
2052 if (err)
2053 printk(KERN_ERR "pktgen: ERROR: IPv6 link "
2054 "address not availble.\n");
2055 }
2056 #endif
2057 } else {
2058 pkt_dev->saddr_min = 0;
2059 pkt_dev->saddr_max = 0;
2060 if (strlen(pkt_dev->src_min) == 0) {
2061
2062 struct in_device *in_dev;
2063
2064 rcu_read_lock();
2065 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2066 if (in_dev) {
2067 if (in_dev->ifa_list) {
2068 pkt_dev->saddr_min =
2069 in_dev->ifa_list->ifa_address;
2070 pkt_dev->saddr_max = pkt_dev->saddr_min;
2071 }
2072 }
2073 rcu_read_unlock();
2074 } else {
2075 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2076 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2077 }
2078
2079 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2080 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2081 }
2082 /* Initialize current values. */
2083 pkt_dev->cur_dst_mac_offset = 0;
2084 pkt_dev->cur_src_mac_offset = 0;
2085 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2086 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2087 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2088 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2089 pkt_dev->nflows = 0;
2090 }
2091
2092 static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us)
2093 {
2094 __u64 start;
2095 __u64 now;
2096
2097 start = now = getCurUs();
2098 while (now < spin_until_us) {
2099 /* TODO: optimize sleeping behavior */
2100 if (spin_until_us - now > jiffies_to_usecs(1) + 1)
2101 schedule_timeout_interruptible(1);
2102 else if (spin_until_us - now > 100) {
2103 if (!pkt_dev->running)
2104 return;
2105 if (need_resched())
2106 schedule();
2107 }
2108
2109 now = getCurUs();
2110 }
2111
2112 pkt_dev->idle_acc += now - start;
2113 }
2114
2115 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2116 {
2117 pkt_dev->pkt_overhead = 0;
2118 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2119 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2120 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2121 }
2122
2123 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2124 {
2125 return !!(pkt_dev->flows[flow].flags & F_INIT);
2126 }
2127
2128 static inline int f_pick(struct pktgen_dev *pkt_dev)
2129 {
2130 int flow = pkt_dev->curfl;
2131
2132 if (pkt_dev->flags & F_FLOW_SEQ) {
2133 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2134 /* reset time */
2135 pkt_dev->flows[flow].count = 0;
2136 pkt_dev->flows[flow].flags = 0;
2137 pkt_dev->curfl += 1;
2138 if (pkt_dev->curfl >= pkt_dev->cflows)
2139 pkt_dev->curfl = 0; /*reset */
2140 }
2141 } else {
2142 flow = random32() % pkt_dev->cflows;
2143 pkt_dev->curfl = flow;
2144
2145 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2146 pkt_dev->flows[flow].count = 0;
2147 pkt_dev->flows[flow].flags = 0;
2148 }
2149 }
2150
2151 return pkt_dev->curfl;
2152 }
2153
2154
2155 #ifdef CONFIG_XFRM
2156 /* If there was already an IPSEC SA, we keep it as is, else
2157 * we go look for it ...
2158 */
2159 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2160 {
2161 struct xfrm_state *x = pkt_dev->flows[flow].x;
2162 if (!x) {
2163 /*slow path: we dont already have xfrm_state*/
2164 x = xfrm_stateonly_find(&init_net,
2165 (xfrm_address_t *)&pkt_dev->cur_daddr,
2166 (xfrm_address_t *)&pkt_dev->cur_saddr,
2167 AF_INET,
2168 pkt_dev->ipsmode,
2169 pkt_dev->ipsproto, 0);
2170 if (x) {
2171 pkt_dev->flows[flow].x = x;
2172 set_pkt_overhead(pkt_dev);
2173 pkt_dev->pkt_overhead+=x->props.header_len;
2174 }
2175
2176 }
2177 }
2178 #endif
2179 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2180 {
2181
2182 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2183 pkt_dev->cur_queue_map = smp_processor_id();
2184
2185 else if (pkt_dev->queue_map_min < pkt_dev->queue_map_max) {
2186 __u16 t;
2187 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2188 t = random32() %
2189 (pkt_dev->queue_map_max -
2190 pkt_dev->queue_map_min + 1)
2191 + pkt_dev->queue_map_min;
2192 } else {
2193 t = pkt_dev->cur_queue_map + 1;
2194 if (t > pkt_dev->queue_map_max)
2195 t = pkt_dev->queue_map_min;
2196 }
2197 pkt_dev->cur_queue_map = t;
2198 }
2199 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2200 }
2201
2202 /* Increment/randomize headers according to flags and current values
2203 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2204 */
2205 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2206 {
2207 __u32 imn;
2208 __u32 imx;
2209 int flow = 0;
2210
2211 if (pkt_dev->cflows)
2212 flow = f_pick(pkt_dev);
2213
2214 /* Deal with source MAC */
2215 if (pkt_dev->src_mac_count > 1) {
2216 __u32 mc;
2217 __u32 tmp;
2218
2219 if (pkt_dev->flags & F_MACSRC_RND)
2220 mc = random32() % pkt_dev->src_mac_count;
2221 else {
2222 mc = pkt_dev->cur_src_mac_offset++;
2223 if (pkt_dev->cur_src_mac_offset >=
2224 pkt_dev->src_mac_count)
2225 pkt_dev->cur_src_mac_offset = 0;
2226 }
2227
2228 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2229 pkt_dev->hh[11] = tmp;
2230 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2231 pkt_dev->hh[10] = tmp;
2232 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2233 pkt_dev->hh[9] = tmp;
2234 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2235 pkt_dev->hh[8] = tmp;
2236 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2237 pkt_dev->hh[7] = tmp;
2238 }
2239
2240 /* Deal with Destination MAC */
2241 if (pkt_dev->dst_mac_count > 1) {
2242 __u32 mc;
2243 __u32 tmp;
2244
2245 if (pkt_dev->flags & F_MACDST_RND)
2246 mc = random32() % pkt_dev->dst_mac_count;
2247
2248 else {
2249 mc = pkt_dev->cur_dst_mac_offset++;
2250 if (pkt_dev->cur_dst_mac_offset >=
2251 pkt_dev->dst_mac_count) {
2252 pkt_dev->cur_dst_mac_offset = 0;
2253 }
2254 }
2255
2256 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2257 pkt_dev->hh[5] = tmp;
2258 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2259 pkt_dev->hh[4] = tmp;
2260 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2261 pkt_dev->hh[3] = tmp;
2262 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2263 pkt_dev->hh[2] = tmp;
2264 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2265 pkt_dev->hh[1] = tmp;
2266 }
2267
2268 if (pkt_dev->flags & F_MPLS_RND) {
2269 unsigned i;
2270 for (i = 0; i < pkt_dev->nr_labels; i++)
2271 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2272 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2273 ((__force __be32)random32() &
2274 htonl(0x000fffff));
2275 }
2276
2277 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2278 pkt_dev->vlan_id = random32() & (4096-1);
2279 }
2280
2281 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2282 pkt_dev->svlan_id = random32() & (4096 - 1);
2283 }
2284
2285 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2286 if (pkt_dev->flags & F_UDPSRC_RND)
2287 pkt_dev->cur_udp_src = random32() %
2288 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2289 + pkt_dev->udp_src_min;
2290
2291 else {
2292 pkt_dev->cur_udp_src++;
2293 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2294 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2295 }
2296 }
2297
2298 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2299 if (pkt_dev->flags & F_UDPDST_RND) {
2300 pkt_dev->cur_udp_dst = random32() %
2301 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2302 + pkt_dev->udp_dst_min;
2303 } else {
2304 pkt_dev->cur_udp_dst++;
2305 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2306 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2307 }
2308 }
2309
2310 if (!(pkt_dev->flags & F_IPV6)) {
2311
2312 if ((imn = ntohl(pkt_dev->saddr_min)) < (imx =
2313 ntohl(pkt_dev->
2314 saddr_max))) {
2315 __u32 t;
2316 if (pkt_dev->flags & F_IPSRC_RND)
2317 t = random32() % (imx - imn) + imn;
2318 else {
2319 t = ntohl(pkt_dev->cur_saddr);
2320 t++;
2321 if (t > imx) {
2322 t = imn;
2323 }
2324 }
2325 pkt_dev->cur_saddr = htonl(t);
2326 }
2327
2328 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2329 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2330 } else {
2331 imn = ntohl(pkt_dev->daddr_min);
2332 imx = ntohl(pkt_dev->daddr_max);
2333 if (imn < imx) {
2334 __u32 t;
2335 __be32 s;
2336 if (pkt_dev->flags & F_IPDST_RND) {
2337
2338 t = random32() % (imx - imn) + imn;
2339 s = htonl(t);
2340
2341 while (ipv4_is_loopback(s) ||
2342 ipv4_is_multicast(s) ||
2343 ipv4_is_lbcast(s) ||
2344 ipv4_is_zeronet(s) ||
2345 ipv4_is_local_multicast(s)) {
2346 t = random32() % (imx - imn) + imn;
2347 s = htonl(t);
2348 }
2349 pkt_dev->cur_daddr = s;
2350 } else {
2351 t = ntohl(pkt_dev->cur_daddr);
2352 t++;
2353 if (t > imx) {
2354 t = imn;
2355 }
2356 pkt_dev->cur_daddr = htonl(t);
2357 }
2358 }
2359 if (pkt_dev->cflows) {
2360 pkt_dev->flows[flow].flags |= F_INIT;
2361 pkt_dev->flows[flow].cur_daddr =
2362 pkt_dev->cur_daddr;
2363 #ifdef CONFIG_XFRM
2364 if (pkt_dev->flags & F_IPSEC_ON)
2365 get_ipsec_sa(pkt_dev, flow);
2366 #endif
2367 pkt_dev->nflows++;
2368 }
2369 }
2370 } else { /* IPV6 * */
2371
2372 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2373 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2374 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2375 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2376 else {
2377 int i;
2378
2379 /* Only random destinations yet */
2380
2381 for (i = 0; i < 4; i++) {
2382 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2383 (((__force __be32)random32() |
2384 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2385 pkt_dev->max_in6_daddr.s6_addr32[i]);
2386 }
2387 }
2388 }
2389
2390 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2391 __u32 t;
2392 if (pkt_dev->flags & F_TXSIZE_RND) {
2393 t = random32() %
2394 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2395 + pkt_dev->min_pkt_size;
2396 } else {
2397 t = pkt_dev->cur_pkt_size + 1;
2398 if (t > pkt_dev->max_pkt_size)
2399 t = pkt_dev->min_pkt_size;
2400 }
2401 pkt_dev->cur_pkt_size = t;
2402 }
2403
2404 set_cur_queue_map(pkt_dev);
2405
2406 pkt_dev->flows[flow].count++;
2407 }
2408
2409
2410 #ifdef CONFIG_XFRM
2411 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2412 {
2413 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2414 int err = 0;
2415 struct iphdr *iph;
2416
2417 if (!x)
2418 return 0;
2419 /* XXX: we dont support tunnel mode for now until
2420 * we resolve the dst issue */
2421 if (x->props.mode != XFRM_MODE_TRANSPORT)
2422 return 0;
2423
2424 spin_lock(&x->lock);
2425 iph = ip_hdr(skb);
2426
2427 err = x->outer_mode->output(x, skb);
2428 if (err)
2429 goto error;
2430 err = x->type->output(x, skb);
2431 if (err)
2432 goto error;
2433
2434 x->curlft.bytes +=skb->len;
2435 x->curlft.packets++;
2436 error:
2437 spin_unlock(&x->lock);
2438 return err;
2439 }
2440
2441 static void free_SAs(struct pktgen_dev *pkt_dev)
2442 {
2443 if (pkt_dev->cflows) {
2444 /* let go of the SAs if we have them */
2445 int i = 0;
2446 for (; i < pkt_dev->cflows; i++) {
2447 struct xfrm_state *x = pkt_dev->flows[i].x;
2448 if (x) {
2449 xfrm_state_put(x);
2450 pkt_dev->flows[i].x = NULL;
2451 }
2452 }
2453 }
2454 }
2455
2456 static int process_ipsec(struct pktgen_dev *pkt_dev,
2457 struct sk_buff *skb, __be16 protocol)
2458 {
2459 if (pkt_dev->flags & F_IPSEC_ON) {
2460 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2461 int nhead = 0;
2462 if (x) {
2463 int ret;
2464 __u8 *eth;
2465 nhead = x->props.header_len - skb_headroom(skb);
2466 if (nhead >0) {
2467 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2468 if (ret < 0) {
2469 printk(KERN_ERR "Error expanding "
2470 "ipsec packet %d\n",ret);
2471 goto err;
2472 }
2473 }
2474
2475 /* ipsec is not expecting ll header */
2476 skb_pull(skb, ETH_HLEN);
2477 ret = pktgen_output_ipsec(skb, pkt_dev);
2478 if (ret) {
2479 printk(KERN_ERR "Error creating ipsec "
2480 "packet %d\n",ret);
2481 goto err;
2482 }
2483 /* restore ll */
2484 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2485 memcpy(eth, pkt_dev->hh, 12);
2486 *(u16 *) & eth[12] = protocol;
2487 }
2488 }
2489 return 1;
2490 err:
2491 kfree_skb(skb);
2492 return 0;
2493 }
2494 #endif
2495
2496 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2497 {
2498 unsigned i;
2499 for (i = 0; i < pkt_dev->nr_labels; i++) {
2500 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2501 }
2502 mpls--;
2503 *mpls |= MPLS_STACK_BOTTOM;
2504 }
2505
2506 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2507 unsigned int prio)
2508 {
2509 return htons(id | (cfi << 12) | (prio << 13));
2510 }
2511
2512 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2513 struct pktgen_dev *pkt_dev)
2514 {
2515 struct sk_buff *skb = NULL;
2516 __u8 *eth;
2517 struct udphdr *udph;
2518 int datalen, iplen;
2519 struct iphdr *iph;
2520 struct pktgen_hdr *pgh = NULL;
2521 __be16 protocol = htons(ETH_P_IP);
2522 __be32 *mpls;
2523 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2524 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2525 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2526 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2527 u16 queue_map;
2528
2529 if (pkt_dev->nr_labels)
2530 protocol = htons(ETH_P_MPLS_UC);
2531
2532 if (pkt_dev->vlan_id != 0xffff)
2533 protocol = htons(ETH_P_8021Q);
2534
2535 /* Update any of the values, used when we're incrementing various
2536 * fields.
2537 */
2538 queue_map = pkt_dev->cur_queue_map;
2539 mod_cur_headers(pkt_dev);
2540
2541 datalen = (odev->hard_header_len + 16) & ~0xf;
2542 skb = __netdev_alloc_skb(odev,
2543 pkt_dev->cur_pkt_size + 64
2544 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2545 if (!skb) {
2546 sprintf(pkt_dev->result, "No memory");
2547 return NULL;
2548 }
2549
2550 skb_reserve(skb, datalen);
2551
2552 /* Reserve for ethernet and IP header */
2553 eth = (__u8 *) skb_push(skb, 14);
2554 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2555 if (pkt_dev->nr_labels)
2556 mpls_push(mpls, pkt_dev);
2557
2558 if (pkt_dev->vlan_id != 0xffff) {
2559 if (pkt_dev->svlan_id != 0xffff) {
2560 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2561 *svlan_tci = build_tci(pkt_dev->svlan_id,
2562 pkt_dev->svlan_cfi,
2563 pkt_dev->svlan_p);
2564 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2565 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2566 }
2567 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2568 *vlan_tci = build_tci(pkt_dev->vlan_id,
2569 pkt_dev->vlan_cfi,
2570 pkt_dev->vlan_p);
2571 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2572 *vlan_encapsulated_proto = htons(ETH_P_IP);
2573 }
2574
2575 skb->network_header = skb->tail;
2576 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2577 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2578 skb_set_queue_mapping(skb, queue_map);
2579 iph = ip_hdr(skb);
2580 udph = udp_hdr(skb);
2581
2582 memcpy(eth, pkt_dev->hh, 12);
2583 *(__be16 *) & eth[12] = protocol;
2584
2585 /* Eth + IPh + UDPh + mpls */
2586 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2587 pkt_dev->pkt_overhead;
2588 if (datalen < sizeof(struct pktgen_hdr))
2589 datalen = sizeof(struct pktgen_hdr);
2590
2591 udph->source = htons(pkt_dev->cur_udp_src);
2592 udph->dest = htons(pkt_dev->cur_udp_dst);
2593 udph->len = htons(datalen + 8); /* DATA + udphdr */
2594 udph->check = 0; /* No checksum */
2595
2596 iph->ihl = 5;
2597 iph->version = 4;
2598 iph->ttl = 32;
2599 iph->tos = pkt_dev->tos;
2600 iph->protocol = IPPROTO_UDP; /* UDP */
2601 iph->saddr = pkt_dev->cur_saddr;
2602 iph->daddr = pkt_dev->cur_daddr;
2603 iph->frag_off = 0;
2604 iplen = 20 + 8 + datalen;
2605 iph->tot_len = htons(iplen);
2606 iph->check = 0;
2607 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2608 skb->protocol = protocol;
2609 skb->mac_header = (skb->network_header - ETH_HLEN -
2610 pkt_dev->pkt_overhead);
2611 skb->dev = odev;
2612 skb->pkt_type = PACKET_HOST;
2613
2614 if (pkt_dev->nfrags <= 0)
2615 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2616 else {
2617 int frags = pkt_dev->nfrags;
2618 int i;
2619
2620 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2621
2622 if (frags > MAX_SKB_FRAGS)
2623 frags = MAX_SKB_FRAGS;
2624 if (datalen > frags * PAGE_SIZE) {
2625 skb_put(skb, datalen - frags * PAGE_SIZE);
2626 datalen = frags * PAGE_SIZE;
2627 }
2628
2629 i = 0;
2630 while (datalen > 0) {
2631 struct page *page = alloc_pages(GFP_KERNEL, 0);
2632 skb_shinfo(skb)->frags[i].page = page;
2633 skb_shinfo(skb)->frags[i].page_offset = 0;
2634 skb_shinfo(skb)->frags[i].size =
2635 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2636 datalen -= skb_shinfo(skb)->frags[i].size;
2637 skb->len += skb_shinfo(skb)->frags[i].size;
2638 skb->data_len += skb_shinfo(skb)->frags[i].size;
2639 i++;
2640 skb_shinfo(skb)->nr_frags = i;
2641 }
2642
2643 while (i < frags) {
2644 int rem;
2645
2646 if (i == 0)
2647 break;
2648
2649 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2650 if (rem == 0)
2651 break;
2652
2653 skb_shinfo(skb)->frags[i - 1].size -= rem;
2654
2655 skb_shinfo(skb)->frags[i] =
2656 skb_shinfo(skb)->frags[i - 1];
2657 get_page(skb_shinfo(skb)->frags[i].page);
2658 skb_shinfo(skb)->frags[i].page =
2659 skb_shinfo(skb)->frags[i - 1].page;
2660 skb_shinfo(skb)->frags[i].page_offset +=
2661 skb_shinfo(skb)->frags[i - 1].size;
2662 skb_shinfo(skb)->frags[i].size = rem;
2663 i++;
2664 skb_shinfo(skb)->nr_frags = i;
2665 }
2666 }
2667
2668 /* Stamp the time, and sequence number, convert them to network byte order */
2669
2670 if (pgh) {
2671 struct timeval timestamp;
2672
2673 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2674 pgh->seq_num = htonl(pkt_dev->seq_num);
2675
2676 do_gettimeofday(&timestamp);
2677 pgh->tv_sec = htonl(timestamp.tv_sec);
2678 pgh->tv_usec = htonl(timestamp.tv_usec);
2679 }
2680
2681 #ifdef CONFIG_XFRM
2682 if (!process_ipsec(pkt_dev, skb, protocol))
2683 return NULL;
2684 #endif
2685
2686 return skb;
2687 }
2688
2689 /*
2690 * scan_ip6, fmt_ip taken from dietlibc-0.21
2691 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2692 *
2693 * Slightly modified for kernel.
2694 * Should be candidate for net/ipv4/utils.c
2695 * --ro
2696 */
2697
2698 static unsigned int scan_ip6(const char *s, char ip[16])
2699 {
2700 unsigned int i;
2701 unsigned int len = 0;
2702 unsigned long u;
2703 char suffix[16];
2704 unsigned int prefixlen = 0;
2705 unsigned int suffixlen = 0;
2706 __be32 tmp;
2707 char *pos;
2708
2709 for (i = 0; i < 16; i++)
2710 ip[i] = 0;
2711
2712 for (;;) {
2713 if (*s == ':') {
2714 len++;
2715 if (s[1] == ':') { /* Found "::", skip to part 2 */
2716 s += 2;
2717 len++;
2718 break;
2719 }
2720 s++;
2721 }
2722
2723 u = simple_strtoul(s, &pos, 16);
2724 i = pos - s;
2725 if (!i)
2726 return 0;
2727 if (prefixlen == 12 && s[i] == '.') {
2728
2729 /* the last 4 bytes may be written as IPv4 address */
2730
2731 tmp = in_aton(s);
2732 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2733 return i + len;
2734 }
2735 ip[prefixlen++] = (u >> 8);
2736 ip[prefixlen++] = (u & 255);
2737 s += i;
2738 len += i;
2739 if (prefixlen == 16)
2740 return len;
2741 }
2742
2743 /* part 2, after "::" */
2744 for (;;) {
2745 if (*s == ':') {
2746 if (suffixlen == 0)
2747 break;
2748 s++;
2749 len++;
2750 } else if (suffixlen != 0)
2751 break;
2752
2753 u = simple_strtol(s, &pos, 16);
2754 i = pos - s;
2755 if (!i) {
2756 if (*s)
2757 len--;
2758 break;
2759 }
2760 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2761 tmp = in_aton(s);
2762 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2763 sizeof(tmp));
2764 suffixlen += 4;
2765 len += strlen(s);
2766 break;
2767 }
2768 suffix[suffixlen++] = (u >> 8);
2769 suffix[suffixlen++] = (u & 255);
2770 s += i;
2771 len += i;
2772 if (prefixlen + suffixlen == 16)
2773 break;
2774 }
2775 for (i = 0; i < suffixlen; i++)
2776 ip[16 - suffixlen + i] = suffix[i];
2777 return len;
2778 }
2779
2780 static char tohex(char hexdigit)
2781 {
2782 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2783 }
2784
2785 static int fmt_xlong(char *s, unsigned int i)
2786 {
2787 char *bak = s;
2788 *s = tohex((i >> 12) & 0xf);
2789 if (s != bak || *s != '0')
2790 ++s;
2791 *s = tohex((i >> 8) & 0xf);
2792 if (s != bak || *s != '0')
2793 ++s;
2794 *s = tohex((i >> 4) & 0xf);
2795 if (s != bak || *s != '0')
2796 ++s;
2797 *s = tohex(i & 0xf);
2798 return s - bak + 1;
2799 }
2800
2801 static unsigned int fmt_ip6(char *s, const char ip[16])
2802 {
2803 unsigned int len;
2804 unsigned int i;
2805 unsigned int temp;
2806 unsigned int compressing;
2807 int j;
2808
2809 len = 0;
2810 compressing = 0;
2811 for (j = 0; j < 16; j += 2) {
2812
2813 #ifdef V4MAPPEDPREFIX
2814 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2815 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2816 temp = strlen(s);
2817 return len + temp;
2818 }
2819 #endif
2820 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2821 (unsigned long)(unsigned char)ip[j + 1];
2822 if (temp == 0) {
2823 if (!compressing) {
2824 compressing = 1;
2825 if (j == 0) {
2826 *s++ = ':';
2827 ++len;
2828 }
2829 }
2830 } else {
2831 if (compressing) {
2832 compressing = 0;
2833 *s++ = ':';
2834 ++len;
2835 }
2836 i = fmt_xlong(s, temp);
2837 len += i;
2838 s += i;
2839 if (j < 14) {
2840 *s++ = ':';
2841 ++len;
2842 }
2843 }
2844 }
2845 if (compressing) {
2846 *s++ = ':';
2847 ++len;
2848 }
2849 *s = 0;
2850 return len;
2851 }
2852
2853 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2854 struct pktgen_dev *pkt_dev)
2855 {
2856 struct sk_buff *skb = NULL;
2857 __u8 *eth;
2858 struct udphdr *udph;
2859 int datalen;
2860 struct ipv6hdr *iph;
2861 struct pktgen_hdr *pgh = NULL;
2862 __be16 protocol = htons(ETH_P_IPV6);
2863 __be32 *mpls;
2864 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2865 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2866 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2867 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2868 u16 queue_map;
2869
2870 if (pkt_dev->nr_labels)
2871 protocol = htons(ETH_P_MPLS_UC);
2872
2873 if (pkt_dev->vlan_id != 0xffff)
2874 protocol = htons(ETH_P_8021Q);
2875
2876 /* Update any of the values, used when we're incrementing various
2877 * fields.
2878 */
2879 queue_map = pkt_dev->cur_queue_map;
2880 mod_cur_headers(pkt_dev);
2881
2882 skb = __netdev_alloc_skb(odev,
2883 pkt_dev->cur_pkt_size + 64
2884 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
2885 if (!skb) {
2886 sprintf(pkt_dev->result, "No memory");
2887 return NULL;
2888 }
2889
2890 skb_reserve(skb, 16);
2891
2892 /* Reserve for ethernet and IP header */
2893 eth = (__u8 *) skb_push(skb, 14);
2894 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2895 if (pkt_dev->nr_labels)
2896 mpls_push(mpls, pkt_dev);
2897
2898 if (pkt_dev->vlan_id != 0xffff) {
2899 if (pkt_dev->svlan_id != 0xffff) {
2900 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2901 *svlan_tci = build_tci(pkt_dev->svlan_id,
2902 pkt_dev->svlan_cfi,
2903 pkt_dev->svlan_p);
2904 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2905 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2906 }
2907 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2908 *vlan_tci = build_tci(pkt_dev->vlan_id,
2909 pkt_dev->vlan_cfi,
2910 pkt_dev->vlan_p);
2911 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2912 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2913 }
2914
2915 skb->network_header = skb->tail;
2916 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2917 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2918 skb_set_queue_mapping(skb, queue_map);
2919 iph = ipv6_hdr(skb);
2920 udph = udp_hdr(skb);
2921
2922 memcpy(eth, pkt_dev->hh, 12);
2923 *(__be16 *) & eth[12] = protocol;
2924
2925 /* Eth + IPh + UDPh + mpls */
2926 datalen = pkt_dev->cur_pkt_size - 14 -
2927 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2928 pkt_dev->pkt_overhead;
2929
2930 if (datalen < sizeof(struct pktgen_hdr)) {
2931 datalen = sizeof(struct pktgen_hdr);
2932 if (net_ratelimit())
2933 printk(KERN_INFO "pktgen: increased datalen to %d\n",
2934 datalen);
2935 }
2936
2937 udph->source = htons(pkt_dev->cur_udp_src);
2938 udph->dest = htons(pkt_dev->cur_udp_dst);
2939 udph->len = htons(datalen + sizeof(struct udphdr));
2940 udph->check = 0; /* No checksum */
2941
2942 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2943
2944 if (pkt_dev->traffic_class) {
2945 /* Version + traffic class + flow (0) */
2946 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2947 }
2948
2949 iph->hop_limit = 32;
2950
2951 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2952 iph->nexthdr = IPPROTO_UDP;
2953
2954 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2955 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2956
2957 skb->mac_header = (skb->network_header - ETH_HLEN -
2958 pkt_dev->pkt_overhead);
2959 skb->protocol = protocol;
2960 skb->dev = odev;
2961 skb->pkt_type = PACKET_HOST;
2962
2963 if (pkt_dev->nfrags <= 0)
2964 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2965 else {
2966 int frags = pkt_dev->nfrags;
2967 int i;
2968
2969 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2970
2971 if (frags > MAX_SKB_FRAGS)
2972 frags = MAX_SKB_FRAGS;
2973 if (datalen > frags * PAGE_SIZE) {
2974 skb_put(skb, datalen - frags * PAGE_SIZE);
2975 datalen = frags * PAGE_SIZE;
2976 }
2977
2978 i = 0;
2979 while (datalen > 0) {
2980 struct page *page = alloc_pages(GFP_KERNEL, 0);
2981 skb_shinfo(skb)->frags[i].page = page;
2982 skb_shinfo(skb)->frags[i].page_offset = 0;
2983 skb_shinfo(skb)->frags[i].size =
2984 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2985 datalen -= skb_shinfo(skb)->frags[i].size;
2986 skb->len += skb_shinfo(skb)->frags[i].size;
2987 skb->data_len += skb_shinfo(skb)->frags[i].size;
2988 i++;
2989 skb_shinfo(skb)->nr_frags = i;
2990 }
2991
2992 while (i < frags) {
2993 int rem;
2994
2995 if (i == 0)
2996 break;
2997
2998 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2999 if (rem == 0)
3000 break;
3001
3002 skb_shinfo(skb)->frags[i - 1].size -= rem;
3003
3004 skb_shinfo(skb)->frags[i] =
3005 skb_shinfo(skb)->frags[i - 1];
3006 get_page(skb_shinfo(skb)->frags[i].page);
3007 skb_shinfo(skb)->frags[i].page =
3008 skb_shinfo(skb)->frags[i - 1].page;
3009 skb_shinfo(skb)->frags[i].page_offset +=
3010 skb_shinfo(skb)->frags[i - 1].size;
3011 skb_shinfo(skb)->frags[i].size = rem;
3012 i++;
3013 skb_shinfo(skb)->nr_frags = i;
3014 }
3015 }
3016
3017 /* Stamp the time, and sequence number, convert them to network byte order */
3018 /* should we update cloned packets too ? */
3019 if (pgh) {
3020 struct timeval timestamp;
3021
3022 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
3023 pgh->seq_num = htonl(pkt_dev->seq_num);
3024
3025 do_gettimeofday(&timestamp);
3026 pgh->tv_sec = htonl(timestamp.tv_sec);
3027 pgh->tv_usec = htonl(timestamp.tv_usec);
3028 }
3029 /* pkt_dev->seq_num++; FF: you really mean this? */
3030
3031 return skb;
3032 }
3033
3034 static struct sk_buff *fill_packet(struct net_device *odev,
3035 struct pktgen_dev *pkt_dev)
3036 {
3037 if (pkt_dev->flags & F_IPV6)
3038 return fill_packet_ipv6(odev, pkt_dev);
3039 else
3040 return fill_packet_ipv4(odev, pkt_dev);
3041 }
3042
3043 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3044 {
3045 pkt_dev->seq_num = 1;
3046 pkt_dev->idle_acc = 0;
3047 pkt_dev->sofar = 0;
3048 pkt_dev->tx_bytes = 0;
3049 pkt_dev->errors = 0;
3050 }
3051
3052 /* Set up structure for sending pkts, clear counters */
3053
3054 static void pktgen_run(struct pktgen_thread *t)
3055 {
3056 struct pktgen_dev *pkt_dev;
3057 int started = 0;
3058
3059 pr_debug("pktgen: entering pktgen_run. %p\n", t);
3060
3061 if_lock(t);
3062 list_for_each_entry(pkt_dev, &t->if_list, list) {
3063
3064 /*
3065 * setup odev and create initial packet.
3066 */
3067 pktgen_setup_inject(pkt_dev);
3068
3069 if (pkt_dev->odev) {
3070 pktgen_clear_counters(pkt_dev);
3071 pkt_dev->running = 1; /* Cranke yeself! */
3072 pkt_dev->skb = NULL;
3073 pkt_dev->started_at = getCurUs();
3074 pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */
3075 pkt_dev->next_tx_ns = 0;
3076 set_pkt_overhead(pkt_dev);
3077
3078 strcpy(pkt_dev->result, "Starting");
3079 started++;
3080 } else
3081 strcpy(pkt_dev->result, "Error starting");
3082 }
3083 if_unlock(t);
3084 if (started)
3085 t->control &= ~(T_STOP);
3086 }
3087
3088 static void pktgen_stop_all_threads_ifs(void)
3089 {
3090 struct pktgen_thread *t;
3091
3092 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n");
3093
3094 mutex_lock(&pktgen_thread_lock);
3095
3096 list_for_each_entry(t, &pktgen_threads, th_list)
3097 t->control |= T_STOP;
3098
3099 mutex_unlock(&pktgen_thread_lock);
3100 }
3101
3102 static int thread_is_running(const struct pktgen_thread *t)
3103 {
3104 const struct pktgen_dev *pkt_dev;
3105
3106 list_for_each_entry(pkt_dev, &t->if_list, list)
3107 if (pkt_dev->running)
3108 return 1;
3109 return 0;
3110 }
3111
3112 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3113 {
3114 if_lock(t);
3115
3116 while (thread_is_running(t)) {
3117
3118 if_unlock(t);
3119
3120 msleep_interruptible(100);
3121
3122 if (signal_pending(current))
3123 goto signal;
3124 if_lock(t);
3125 }
3126 if_unlock(t);
3127 return 1;
3128 signal:
3129 return 0;
3130 }
3131
3132 static int pktgen_wait_all_threads_run(void)
3133 {
3134 struct pktgen_thread *t;
3135 int sig = 1;
3136
3137 mutex_lock(&pktgen_thread_lock);
3138
3139 list_for_each_entry(t, &pktgen_threads, th_list) {
3140 sig = pktgen_wait_thread_run(t);
3141 if (sig == 0)
3142 break;
3143 }
3144
3145 if (sig == 0)
3146 list_for_each_entry(t, &pktgen_threads, th_list)
3147 t->control |= (T_STOP);
3148
3149 mutex_unlock(&pktgen_thread_lock);
3150 return sig;
3151 }
3152
3153 static void pktgen_run_all_threads(void)
3154 {
3155 struct pktgen_thread *t;
3156
3157 pr_debug("pktgen: entering pktgen_run_all_threads.\n");
3158
3159 mutex_lock(&pktgen_thread_lock);
3160
3161 list_for_each_entry(t, &pktgen_threads, th_list)
3162 t->control |= (T_RUN);
3163
3164 mutex_unlock(&pktgen_thread_lock);
3165
3166 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
3167
3168 pktgen_wait_all_threads_run();
3169 }
3170
3171 static void pktgen_reset_all_threads(void)
3172 {
3173 struct pktgen_thread *t;
3174
3175 pr_debug("pktgen: entering pktgen_reset_all_threads.\n");
3176
3177 mutex_lock(&pktgen_thread_lock);
3178
3179 list_for_each_entry(t, &pktgen_threads, th_list)
3180 t->control |= (T_REMDEVALL);
3181
3182 mutex_unlock(&pktgen_thread_lock);
3183
3184 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
3185
3186 pktgen_wait_all_threads_run();
3187 }
3188
3189 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3190 {
3191 __u64 total_us, bps, mbps, pps, idle;
3192 char *p = pkt_dev->result;
3193
3194 total_us = pkt_dev->stopped_at - pkt_dev->started_at;
3195
3196 idle = pkt_dev->idle_acc;
3197
3198 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3199 (unsigned long long)total_us,
3200 (unsigned long long)(total_us - idle),
3201 (unsigned long long)idle,
3202 (unsigned long long)pkt_dev->sofar,
3203 pkt_dev->cur_pkt_size, nr_frags);
3204
3205 pps = pkt_dev->sofar * USEC_PER_SEC;
3206
3207 while ((total_us >> 32) != 0) {
3208 pps >>= 1;
3209 total_us >>= 1;
3210 }
3211
3212 do_div(pps, total_us);
3213
3214 bps = pps * 8 * pkt_dev->cur_pkt_size;
3215
3216 mbps = bps;
3217 do_div(mbps, 1000000);
3218 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3219 (unsigned long long)pps,
3220 (unsigned long long)mbps,
3221 (unsigned long long)bps,
3222 (unsigned long long)pkt_dev->errors);
3223 }
3224
3225 /* Set stopped-at timer, remove from running list, do counters & statistics */
3226 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3227 {
3228 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3229
3230 if (!pkt_dev->running) {
3231 printk(KERN_WARNING "pktgen: interface: %s is already "
3232 "stopped\n", pkt_dev->odev->name);
3233 return -EINVAL;
3234 }
3235
3236 kfree_skb(pkt_dev->skb);
3237 pkt_dev->skb = NULL;
3238 pkt_dev->stopped_at = getCurUs();
3239 pkt_dev->running = 0;
3240
3241 show_results(pkt_dev, nr_frags);
3242
3243 return 0;
3244 }
3245
3246 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3247 {
3248 struct pktgen_dev *pkt_dev, *best = NULL;
3249
3250 if_lock(t);
3251
3252 list_for_each_entry(pkt_dev, &t->if_list, list) {
3253 if (!pkt_dev->running)
3254 continue;
3255 if (best == NULL)
3256 best = pkt_dev;
3257 else if (pkt_dev->next_tx_us < best->next_tx_us)
3258 best = pkt_dev;
3259 }
3260 if_unlock(t);
3261 return best;
3262 }
3263
3264 static void pktgen_stop(struct pktgen_thread *t)
3265 {
3266 struct pktgen_dev *pkt_dev;
3267
3268 pr_debug("pktgen: entering pktgen_stop\n");
3269
3270 if_lock(t);
3271
3272 list_for_each_entry(pkt_dev, &t->if_list, list) {
3273 pktgen_stop_device(pkt_dev);
3274 }
3275
3276 if_unlock(t);
3277 }
3278
3279 /*
3280 * one of our devices needs to be removed - find it
3281 * and remove it
3282 */
3283 static void pktgen_rem_one_if(struct pktgen_thread *t)
3284 {
3285 struct list_head *q, *n;
3286 struct pktgen_dev *cur;
3287
3288 pr_debug("pktgen: entering pktgen_rem_one_if\n");
3289
3290 if_lock(t);
3291
3292 list_for_each_safe(q, n, &t->if_list) {
3293 cur = list_entry(q, struct pktgen_dev, list);
3294
3295 if (!cur->removal_mark)
3296 continue;
3297
3298 kfree_skb(cur->skb);
3299 cur->skb = NULL;
3300
3301 pktgen_remove_device(t, cur);
3302
3303 break;
3304 }
3305
3306 if_unlock(t);
3307 }
3308
3309 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3310 {
3311 struct list_head *q, *n;
3312 struct pktgen_dev *cur;
3313
3314 /* Remove all devices, free mem */
3315
3316 pr_debug("pktgen: entering pktgen_rem_all_ifs\n");
3317 if_lock(t);
3318
3319 list_for_each_safe(q, n, &t->if_list) {
3320 cur = list_entry(q, struct pktgen_dev, list);
3321
3322 kfree_skb(cur->skb);
3323 cur->skb = NULL;
3324
3325 pktgen_remove_device(t, cur);
3326 }
3327
3328 if_unlock(t);
3329 }
3330
3331 static void pktgen_rem_thread(struct pktgen_thread *t)
3332 {
3333 /* Remove from the thread list */
3334
3335 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3336
3337 mutex_lock(&pktgen_thread_lock);
3338
3339 list_del(&t->th_list);
3340
3341 mutex_unlock(&pktgen_thread_lock);
3342 }
3343
3344 static void idle(struct pktgen_dev *pkt_dev)
3345 {
3346 u64 idle_start = getCurUs();
3347
3348 if (need_resched())
3349 schedule();
3350 else
3351 cpu_relax();
3352
3353 pkt_dev->idle_acc += getCurUs() - idle_start;
3354 }
3355
3356 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3357 {
3358 struct net_device *odev = pkt_dev->odev;
3359 int (*xmit)(struct sk_buff *, struct net_device *)
3360 = odev->netdev_ops->ndo_start_xmit;
3361 struct netdev_queue *txq;
3362 u16 queue_map;
3363 int ret;
3364
3365 if (pkt_dev->delay_us || pkt_dev->delay_ns) {
3366 u64 now;
3367
3368 now = getCurUs();
3369 if (now < pkt_dev->next_tx_us)
3370 spin(pkt_dev, pkt_dev->next_tx_us);
3371
3372 /* This is max DELAY, this has special meaning of
3373 * "never transmit"
3374 */
3375 if (pkt_dev->delay_us == 0x7FFFFFFF) {
3376 pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us;
3377 pkt_dev->next_tx_ns = pkt_dev->delay_ns;
3378 return;
3379 }
3380 }
3381
3382 if (!pkt_dev->skb) {
3383 set_cur_queue_map(pkt_dev);
3384 queue_map = pkt_dev->cur_queue_map;
3385 } else {
3386 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3387 }
3388
3389 txq = netdev_get_tx_queue(odev, queue_map);
3390 /* Did we saturate the queue already? */
3391 if (netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq)) {
3392 /* If device is down, then all queues are permnantly frozen */
3393 if (netif_running(odev))
3394 idle(pkt_dev);
3395 else
3396 pktgen_stop_device(pkt_dev);
3397 return;
3398 }
3399
3400 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3401 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3402 /* build a new pkt */
3403 kfree_skb(pkt_dev->skb);
3404
3405 pkt_dev->skb = fill_packet(odev, pkt_dev);
3406 if (pkt_dev->skb == NULL) {
3407 printk(KERN_ERR "pktgen: ERROR: couldn't "
3408 "allocate skb in fill_packet.\n");
3409 schedule();
3410 pkt_dev->clone_count--; /* back out increment, OOM */
3411 return;
3412 }
3413
3414 pkt_dev->allocated_skbs++;
3415 pkt_dev->clone_count = 0; /* reset counter */
3416 }
3417
3418 /* fill_packet() might have changed the queue */
3419 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3420 txq = netdev_get_tx_queue(odev, queue_map);
3421
3422 __netif_tx_lock_bh(txq);
3423 if (unlikely(netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq)))
3424 pkt_dev->last_ok = 0;
3425 else {
3426 atomic_inc(&(pkt_dev->skb->users));
3427
3428 retry_now:
3429 ret = (*xmit)(pkt_dev->skb, odev);
3430 switch (ret) {
3431 case NETDEV_TX_OK:
3432 txq_trans_update(txq);
3433 pkt_dev->last_ok = 1;
3434 pkt_dev->sofar++;
3435 pkt_dev->seq_num++;
3436 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size;
3437 break;
3438 case NETDEV_TX_LOCKED:
3439 cpu_relax();
3440 goto retry_now;
3441 default: /* Drivers are not supposed to return other values! */
3442 if (net_ratelimit())
3443 pr_info("pktgen: %s xmit error: %d\n",
3444 odev->name, ret);
3445 pkt_dev->errors++;
3446 /* fallthru */
3447 case NETDEV_TX_BUSY:
3448 /* Retry it next time */
3449 atomic_dec(&(pkt_dev->skb->users));
3450 pkt_dev->last_ok = 0;
3451 }
3452
3453 if (pkt_dev->delay_us || pkt_dev->delay_ns) {
3454 pkt_dev->next_tx_us = getCurUs();
3455 pkt_dev->next_tx_ns = 0;
3456
3457 pkt_dev->next_tx_us += pkt_dev->delay_us;
3458 pkt_dev->next_tx_ns += pkt_dev->delay_ns;
3459
3460 if (pkt_dev->next_tx_ns > 1000) {
3461 pkt_dev->next_tx_us++;
3462 pkt_dev->next_tx_ns -= 1000;
3463 }
3464 }
3465 }
3466 __netif_tx_unlock_bh(txq);
3467
3468 /* If pkt_dev->count is zero, then run forever */
3469 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3470 if (atomic_read(&(pkt_dev->skb->users)) != 1) {
3471 u64 idle_start = getCurUs();
3472 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3473 if (signal_pending(current)) {
3474 break;
3475 }
3476 schedule();
3477 }
3478 pkt_dev->idle_acc += getCurUs() - idle_start;
3479 }
3480
3481 /* Done with this */
3482 pktgen_stop_device(pkt_dev);
3483 }
3484 }
3485
3486 /*
3487 * Main loop of the thread goes here
3488 */
3489
3490 static int pktgen_thread_worker(void *arg)
3491 {
3492 DEFINE_WAIT(wait);
3493 struct pktgen_thread *t = arg;
3494 struct pktgen_dev *pkt_dev = NULL;
3495 int cpu = t->cpu;
3496
3497 BUG_ON(smp_processor_id() != cpu);
3498
3499 init_waitqueue_head(&t->queue);
3500 complete(&t->start_done);
3501
3502 pr_debug("pktgen: starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3503
3504 set_current_state(TASK_INTERRUPTIBLE);
3505
3506 set_freezable();
3507
3508 while (!kthread_should_stop()) {
3509 pkt_dev = next_to_run(t);
3510
3511 if (!pkt_dev &&
3512 (t->control & (T_STOP | T_RUN | T_REMDEVALL | T_REMDEV))
3513 == 0) {
3514 prepare_to_wait(&(t->queue), &wait,
3515 TASK_INTERRUPTIBLE);
3516 schedule_timeout(HZ / 10);
3517 finish_wait(&(t->queue), &wait);
3518 }
3519
3520 __set_current_state(TASK_RUNNING);
3521
3522 if (pkt_dev)
3523 pktgen_xmit(pkt_dev);
3524
3525 if (t->control & T_STOP) {
3526 pktgen_stop(t);
3527 t->control &= ~(T_STOP);
3528 }
3529
3530 if (t->control & T_RUN) {
3531 pktgen_run(t);
3532 t->control &= ~(T_RUN);
3533 }
3534
3535 if (t->control & T_REMDEVALL) {
3536 pktgen_rem_all_ifs(t);
3537 t->control &= ~(T_REMDEVALL);
3538 }
3539
3540 if (t->control & T_REMDEV) {
3541 pktgen_rem_one_if(t);
3542 t->control &= ~(T_REMDEV);
3543 }
3544
3545 try_to_freeze();
3546
3547 set_current_state(TASK_INTERRUPTIBLE);
3548 }
3549
3550 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm);
3551 pktgen_stop(t);
3552
3553 pr_debug("pktgen: %s removing all device\n", t->tsk->comm);
3554 pktgen_rem_all_ifs(t);
3555
3556 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm);
3557 pktgen_rem_thread(t);
3558
3559 return 0;
3560 }
3561
3562 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3563 const char *ifname)
3564 {
3565 struct pktgen_dev *p, *pkt_dev = NULL;
3566 if_lock(t);
3567
3568 list_for_each_entry(p, &t->if_list, list)
3569 if (strncmp(p->odev->name, ifname, IFNAMSIZ) == 0) {
3570 pkt_dev = p;
3571 break;
3572 }
3573
3574 if_unlock(t);
3575 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev);
3576 return pkt_dev;
3577 }
3578
3579 /*
3580 * Adds a dev at front of if_list.
3581 */
3582
3583 static int add_dev_to_thread(struct pktgen_thread *t,
3584 struct pktgen_dev *pkt_dev)
3585 {
3586 int rv = 0;
3587
3588 if_lock(t);
3589
3590 if (pkt_dev->pg_thread) {
3591 printk(KERN_ERR "pktgen: ERROR: already assigned "
3592 "to a thread.\n");
3593 rv = -EBUSY;
3594 goto out;
3595 }
3596
3597 list_add(&pkt_dev->list, &t->if_list);
3598 pkt_dev->pg_thread = t;
3599 pkt_dev->running = 0;
3600
3601 out:
3602 if_unlock(t);
3603 return rv;
3604 }
3605
3606 /* Called under thread lock */
3607
3608 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3609 {
3610 struct pktgen_dev *pkt_dev;
3611 int err;
3612
3613 /* We don't allow a device to be on several threads */
3614
3615 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3616 if (pkt_dev) {
3617 printk(KERN_ERR "pktgen: ERROR: interface already used.\n");
3618 return -EBUSY;
3619 }
3620
3621 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
3622 if (!pkt_dev)
3623 return -ENOMEM;
3624
3625 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state));
3626 if (pkt_dev->flows == NULL) {
3627 kfree(pkt_dev);
3628 return -ENOMEM;
3629 }
3630 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3631
3632 pkt_dev->removal_mark = 0;
3633 pkt_dev->min_pkt_size = ETH_ZLEN;
3634 pkt_dev->max_pkt_size = ETH_ZLEN;
3635 pkt_dev->nfrags = 0;
3636 pkt_dev->clone_skb = pg_clone_skb_d;
3637 pkt_dev->delay_us = pg_delay_d / 1000;
3638 pkt_dev->delay_ns = pg_delay_d % 1000;
3639 pkt_dev->count = pg_count_d;
3640 pkt_dev->sofar = 0;
3641 pkt_dev->udp_src_min = 9; /* sink port */
3642 pkt_dev->udp_src_max = 9;
3643 pkt_dev->udp_dst_min = 9;
3644 pkt_dev->udp_dst_max = 9;
3645
3646 pkt_dev->vlan_p = 0;
3647 pkt_dev->vlan_cfi = 0;
3648 pkt_dev->vlan_id = 0xffff;
3649 pkt_dev->svlan_p = 0;
3650 pkt_dev->svlan_cfi = 0;
3651 pkt_dev->svlan_id = 0xffff;
3652
3653 err = pktgen_setup_dev(pkt_dev, ifname);
3654 if (err)
3655 goto out1;
3656
3657 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3658 &pktgen_if_fops, pkt_dev);
3659 if (!pkt_dev->entry) {
3660 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3661 PG_PROC_DIR, ifname);
3662 err = -EINVAL;
3663 goto out2;
3664 }
3665 #ifdef CONFIG_XFRM
3666 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3667 pkt_dev->ipsproto = IPPROTO_ESP;
3668 #endif
3669
3670 return add_dev_to_thread(t, pkt_dev);
3671 out2:
3672 dev_put(pkt_dev->odev);
3673 out1:
3674 #ifdef CONFIG_XFRM
3675 free_SAs(pkt_dev);
3676 #endif
3677 vfree(pkt_dev->flows);
3678 kfree(pkt_dev);
3679 return err;
3680 }
3681
3682 static int __init pktgen_create_thread(int cpu)
3683 {
3684 struct pktgen_thread *t;
3685 struct proc_dir_entry *pe;
3686 struct task_struct *p;
3687
3688 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL);
3689 if (!t) {
3690 printk(KERN_ERR "pktgen: ERROR: out of memory, can't "
3691 "create new thread.\n");
3692 return -ENOMEM;
3693 }
3694
3695 spin_lock_init(&t->if_lock);
3696 t->cpu = cpu;
3697
3698 INIT_LIST_HEAD(&t->if_list);
3699
3700 list_add_tail(&t->th_list, &pktgen_threads);
3701 init_completion(&t->start_done);
3702
3703 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu);
3704 if (IS_ERR(p)) {
3705 printk(KERN_ERR "pktgen: kernel_thread() failed "
3706 "for cpu %d\n", t->cpu);
3707 list_del(&t->th_list);
3708 kfree(t);
3709 return PTR_ERR(p);
3710 }
3711 kthread_bind(p, cpu);
3712 t->tsk = p;
3713
3714 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3715 &pktgen_thread_fops, t);
3716 if (!pe) {
3717 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3718 PG_PROC_DIR, t->tsk->comm);
3719 kthread_stop(p);
3720 list_del(&t->th_list);
3721 kfree(t);
3722 return -EINVAL;
3723 }
3724
3725 wake_up_process(p);
3726 wait_for_completion(&t->start_done);
3727
3728 return 0;
3729 }
3730
3731 /*
3732 * Removes a device from the thread if_list.
3733 */
3734 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3735 struct pktgen_dev *pkt_dev)
3736 {
3737 struct list_head *q, *n;
3738 struct pktgen_dev *p;
3739
3740 list_for_each_safe(q, n, &t->if_list) {
3741 p = list_entry(q, struct pktgen_dev, list);
3742 if (p == pkt_dev)
3743 list_del(&p->list);
3744 }
3745 }
3746
3747 static int pktgen_remove_device(struct pktgen_thread *t,
3748 struct pktgen_dev *pkt_dev)
3749 {
3750
3751 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev);
3752
3753 if (pkt_dev->running) {
3754 printk(KERN_WARNING "pktgen: WARNING: trying to remove a "
3755 "running interface, stopping it now.\n");
3756 pktgen_stop_device(pkt_dev);
3757 }
3758
3759 /* Dis-associate from the interface */
3760
3761 if (pkt_dev->odev) {
3762 dev_put(pkt_dev->odev);
3763 pkt_dev->odev = NULL;
3764 }
3765
3766 /* And update the thread if_list */
3767
3768 _rem_dev_from_if_list(t, pkt_dev);
3769
3770 if (pkt_dev->entry)
3771 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3772
3773 #ifdef CONFIG_XFRM
3774 free_SAs(pkt_dev);
3775 #endif
3776 vfree(pkt_dev->flows);
3777 kfree(pkt_dev);
3778 return 0;
3779 }
3780
3781 static int __init pg_init(void)
3782 {
3783 int cpu;
3784 struct proc_dir_entry *pe;
3785
3786 printk(KERN_INFO "%s", version);
3787
3788 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3789 if (!pg_proc_dir)
3790 return -ENODEV;
3791
3792 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3793 if (pe == NULL) {
3794 printk(KERN_ERR "pktgen: ERROR: cannot create %s "
3795 "procfs entry.\n", PGCTRL);
3796 proc_net_remove(&init_net, PG_PROC_DIR);
3797 return -EINVAL;
3798 }
3799
3800 /* Register us to receive netdevice events */
3801 register_netdevice_notifier(&pktgen_notifier_block);
3802
3803 for_each_online_cpu(cpu) {
3804 int err;
3805
3806 err = pktgen_create_thread(cpu);
3807 if (err)
3808 printk(KERN_WARNING "pktgen: WARNING: Cannot create "
3809 "thread for cpu %d (%d)\n", cpu, err);
3810 }
3811
3812 if (list_empty(&pktgen_threads)) {
3813 printk(KERN_ERR "pktgen: ERROR: Initialization failed for "
3814 "all threads\n");
3815 unregister_netdevice_notifier(&pktgen_notifier_block);
3816 remove_proc_entry(PGCTRL, pg_proc_dir);
3817 proc_net_remove(&init_net, PG_PROC_DIR);
3818 return -ENODEV;
3819 }
3820
3821 return 0;
3822 }
3823
3824 static void __exit pg_cleanup(void)
3825 {
3826 struct pktgen_thread *t;
3827 struct list_head *q, *n;
3828 wait_queue_head_t queue;
3829 init_waitqueue_head(&queue);
3830
3831 /* Stop all interfaces & threads */
3832
3833 list_for_each_safe(q, n, &pktgen_threads) {
3834 t = list_entry(q, struct pktgen_thread, th_list);
3835 kthread_stop(t->tsk);
3836 kfree(t);
3837 }
3838
3839 /* Un-register us from receiving netdevice events */
3840 unregister_netdevice_notifier(&pktgen_notifier_block);
3841
3842 /* Clean up proc file system */
3843 remove_proc_entry(PGCTRL, pg_proc_dir);
3844 proc_net_remove(&init_net, PG_PROC_DIR);
3845 }
3846
3847 module_init(pg_init);
3848 module_exit(pg_cleanup);
3849
3850 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se");
3851 MODULE_DESCRIPTION("Packet Generator tool");
3852 MODULE_LICENSE("GPL");
3853 module_param(pg_count_d, int, 0);
3854 module_param(pg_delay_d, int, 0);
3855 module_param(pg_clone_skb_d, int, 0);
3856 module_param(debug, int, 0);
Linux kernel - Deliverables
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