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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6
[linux-2.6/next.git] / net / core / pktgen.c
blob67870e9fd097f2ff04edf8d360596ec9e45c9604
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
119 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
120
121 #include <linux/sys.h>
122 #include <linux/types.h>
123 #include <linux/module.h>
124 #include <linux/moduleparam.h>
125 #include <linux/kernel.h>
126 #include <linux/mutex.h>
127 #include <linux/sched.h>
128 #include <linux/slab.h>
129 #include <linux/vmalloc.h>
130 #include <linux/unistd.h>
131 #include <linux/string.h>
132 #include <linux/ptrace.h>
133 #include <linux/errno.h>
134 #include <linux/ioport.h>
135 #include <linux/interrupt.h>
136 #include <linux/capability.h>
137 #include <linux/hrtimer.h>
138 #include <linux/freezer.h>
139 #include <linux/delay.h>
140 #include <linux/timer.h>
141 #include <linux/list.h>
142 #include <linux/init.h>
143 #include <linux/skbuff.h>
144 #include <linux/netdevice.h>
145 #include <linux/inet.h>
146 #include <linux/inetdevice.h>
147 #include <linux/rtnetlink.h>
148 #include <linux/if_arp.h>
149 #include <linux/if_vlan.h>
150 #include <linux/in.h>
151 #include <linux/ip.h>
152 #include <linux/ipv6.h>
153 #include <linux/udp.h>
154 #include <linux/proc_fs.h>
155 #include <linux/seq_file.h>
156 #include <linux/wait.h>
157 #include <linux/etherdevice.h>
158 #include <linux/kthread.h>
159 #include <linux/prefetch.h>
160 #include <net/net_namespace.h>
161 #include <net/checksum.h>
162 #include <net/ipv6.h>
163 #include <net/addrconf.h>
164 #ifdef CONFIG_XFRM
165 #include <net/xfrm.h>
166 #endif
167 #include <asm/byteorder.h>
168 #include <linux/rcupdate.h>
169 #include <linux/bitops.h>
170 #include <linux/io.h>
171 #include <linux/timex.h>
172 #include <linux/uaccess.h>
173 #include <asm/dma.h>
174 #include <asm/div64.h> /* do_div */
175
176 #define VERSION "2.74"
177 #define IP_NAME_SZ 32
178 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
179 #define MPLS_STACK_BOTTOM htonl(0x00000100)
180
181 #define func_enter() pr_debug("entering %s\n", __func__);
182
183 /* Device flag bits */
184 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
185 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
186 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
187 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
188 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
189 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
190 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
191 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
192 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
193 #define F_VID_RND (1<<9) /* Random VLAN ID */
194 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
195 #define F_FLOW_SEQ (1<<11) /* Sequential flows */
196 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */
197 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
198 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
199 #define F_NODE (1<<15) /* Node memory alloc*/
200
201 /* Thread control flag bits */
202 #define T_STOP (1<<0) /* Stop run */
203 #define T_RUN (1<<1) /* Start run */
204 #define T_REMDEVALL (1<<2) /* Remove all devs */
205 #define T_REMDEV (1<<3) /* Remove one dev */
206
207 /* If lock -- can be removed after some work */
208 #define if_lock(t) spin_lock(&(t->if_lock));
209 #define if_unlock(t) spin_unlock(&(t->if_lock));
210
211 /* Used to help with determining the pkts on receive */
212 #define PKTGEN_MAGIC 0xbe9be955
213 #define PG_PROC_DIR "pktgen"
214 #define PGCTRL "pgctrl"
215 static struct proc_dir_entry *pg_proc_dir;
216
217 #define MAX_CFLOWS 65536
218
219 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
220 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
221
222 struct flow_state {
223 __be32 cur_daddr;
224 int count;
225 #ifdef CONFIG_XFRM
226 struct xfrm_state *x;
227 #endif
228 __u32 flags;
229 };
230
231 /* flow flag bits */
232 #define F_INIT (1<<0) /* flow has been initialized */
233
234 struct pktgen_dev {
235 /*
236 * Try to keep frequent/infrequent used vars. separated.
237 */
238 struct proc_dir_entry *entry; /* proc file */
239 struct pktgen_thread *pg_thread;/* the owner */
240 struct list_head list; /* chaining in the thread's run-queue */
241
242 int running; /* if false, the test will stop */
243
244 /* If min != max, then we will either do a linear iteration, or
245 * we will do a random selection from within the range.
246 */
247 __u32 flags;
248 int removal_mark; /* non-zero => the device is marked for
249 * removal by worker thread */
250
251 int min_pkt_size; /* = ETH_ZLEN; */
252 int max_pkt_size; /* = ETH_ZLEN; */
253 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
254 int nfrags;
255 struct page *page;
256 u64 delay; /* nano-seconds */
257
258 __u64 count; /* Default No packets to send */
259 __u64 sofar; /* How many pkts we've sent so far */
260 __u64 tx_bytes; /* How many bytes we've transmitted */
261 __u64 errors; /* Errors when trying to transmit, */
262
263 /* runtime counters relating to clone_skb */
264
265 __u64 allocated_skbs;
266 __u32 clone_count;
267 int last_ok; /* Was last skb sent?
268 * Or a failed transmit of some sort?
269 * This will keep sequence numbers in order
270 */
271 ktime_t next_tx;
272 ktime_t started_at;
273 ktime_t stopped_at;
274 u64 idle_acc; /* nano-seconds */
275
276 __u32 seq_num;
277
278 int clone_skb; /*
279 * Use multiple SKBs during packet gen.
280 * If this number is greater than 1, then
281 * that many copies of the same packet will be
282 * sent before a new packet is allocated.
283 * If you want to send 1024 identical packets
284 * before creating a new packet,
285 * set clone_skb to 1024.
286 */
287
288 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
289 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
290 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
291 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
292
293 struct in6_addr in6_saddr;
294 struct in6_addr in6_daddr;
295 struct in6_addr cur_in6_daddr;
296 struct in6_addr cur_in6_saddr;
297 /* For ranges */
298 struct in6_addr min_in6_daddr;
299 struct in6_addr max_in6_daddr;
300 struct in6_addr min_in6_saddr;
301 struct in6_addr max_in6_saddr;
302
303 /* If we're doing ranges, random or incremental, then this
304 * defines the min/max for those ranges.
305 */
306 __be32 saddr_min; /* inclusive, source IP address */
307 __be32 saddr_max; /* exclusive, source IP address */
308 __be32 daddr_min; /* inclusive, dest IP address */
309 __be32 daddr_max; /* exclusive, dest IP address */
310
311 __u16 udp_src_min; /* inclusive, source UDP port */
312 __u16 udp_src_max; /* exclusive, source UDP port */
313 __u16 udp_dst_min; /* inclusive, dest UDP port */
314 __u16 udp_dst_max; /* exclusive, dest UDP port */
315
316 /* DSCP + ECN */
317 __u8 tos; /* six MSB of (former) IPv4 TOS
318 are for dscp codepoint */
319 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
320 (see RFC 3260, sec. 4) */
321
322 /* MPLS */
323 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
324 __be32 labels[MAX_MPLS_LABELS];
325
326 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
327 __u8 vlan_p;
328 __u8 vlan_cfi;
329 __u16 vlan_id; /* 0xffff means no vlan tag */
330
331 __u8 svlan_p;
332 __u8 svlan_cfi;
333 __u16 svlan_id; /* 0xffff means no svlan tag */
334
335 __u32 src_mac_count; /* How many MACs to iterate through */
336 __u32 dst_mac_count; /* How many MACs to iterate through */
337
338 unsigned char dst_mac[ETH_ALEN];
339 unsigned char src_mac[ETH_ALEN];
340
341 __u32 cur_dst_mac_offset;
342 __u32 cur_src_mac_offset;
343 __be32 cur_saddr;
344 __be32 cur_daddr;
345 __u16 ip_id;
346 __u16 cur_udp_dst;
347 __u16 cur_udp_src;
348 __u16 cur_queue_map;
349 __u32 cur_pkt_size;
350 __u32 last_pkt_size;
351
352 __u8 hh[14];
353 /* = {
354 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
355
356 We fill in SRC address later
357 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
358 0x08, 0x00
359 };
360 */
361 __u16 pad; /* pad out the hh struct to an even 16 bytes */
362
363 struct sk_buff *skb; /* skb we are to transmit next, used for when we
364 * are transmitting the same one multiple times
365 */
366 struct net_device *odev; /* The out-going device.
367 * Note that the device should have it's
368 * pg_info pointer pointing back to this
369 * device.
370 * Set when the user specifies the out-going
371 * device name (not when the inject is
372 * started as it used to do.)
373 */
374 char odevname[32];
375 struct flow_state *flows;
376 unsigned cflows; /* Concurrent flows (config) */
377 unsigned lflow; /* Flow length (config) */
378 unsigned nflows; /* accumulated flows (stats) */
379 unsigned curfl; /* current sequenced flow (state)*/
380
381 u16 queue_map_min;
382 u16 queue_map_max;
383 __u32 skb_priority; /* skb priority field */
384 int node; /* Memory node */
385
386 #ifdef CONFIG_XFRM
387 __u8 ipsmode; /* IPSEC mode (config) */
388 __u8 ipsproto; /* IPSEC type (config) */
389 #endif
390 char result[512];
391 };
392
393 struct pktgen_hdr {
394 __be32 pgh_magic;
395 __be32 seq_num;
396 __be32 tv_sec;
397 __be32 tv_usec;
398 };
399
400 static bool pktgen_exiting __read_mostly;
401
402 struct pktgen_thread {
403 spinlock_t if_lock; /* for list of devices */
404 struct list_head if_list; /* All device here */
405 struct list_head th_list;
406 struct task_struct *tsk;
407 char result[512];
408
409 /* Field for thread to receive "posted" events terminate,
410 stop ifs etc. */
411
412 u32 control;
413 int cpu;
414
415 wait_queue_head_t queue;
416 struct completion start_done;
417 };
418
419 #define REMOVE 1
420 #define FIND 0
421
422 static inline ktime_t ktime_now(void)
423 {
424 struct timespec ts;
425 ktime_get_ts(&ts);
426
427 return timespec_to_ktime(ts);
428 }
429
430 /* This works even if 32 bit because of careful byte order choice */
431 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2)
432 {
433 return cmp1.tv64 < cmp2.tv64;
434 }
435
436 static const char version[] =
437 "Packet Generator for packet performance testing. "
438 "Version: " VERSION "\n";
439
440 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
441 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
442 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
443 const char *ifname, bool exact);
444 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
445 static void pktgen_run_all_threads(void);
446 static void pktgen_reset_all_threads(void);
447 static void pktgen_stop_all_threads_ifs(void);
448
449 static void pktgen_stop(struct pktgen_thread *t);
450 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
451
452 static unsigned int scan_ip6(const char *s, char ip[16]);
453
454 /* Module parameters, defaults. */
455 static int pg_count_d __read_mostly = 1000;
456 static int pg_delay_d __read_mostly;
457 static int pg_clone_skb_d __read_mostly;
458 static int debug __read_mostly;
459
460 static DEFINE_MUTEX(pktgen_thread_lock);
461 static LIST_HEAD(pktgen_threads);
462
463 static struct notifier_block pktgen_notifier_block = {
464 .notifier_call = pktgen_device_event,
465 };
466
467 /*
468 * /proc handling functions
469 *
470 */
471
472 static int pgctrl_show(struct seq_file *seq, void *v)
473 {
474 seq_puts(seq, version);
475 return 0;
476 }
477
478 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
479 size_t count, loff_t *ppos)
480 {
481 int err = 0;
482 char data[128];
483
484 if (!capable(CAP_NET_ADMIN)) {
485 err = -EPERM;
486 goto out;
487 }
488
489 if (count > sizeof(data))
490 count = sizeof(data);
491
492 if (copy_from_user(data, buf, count)) {
493 err = -EFAULT;
494 goto out;
495 }
496 data[count - 1] = 0; /* Make string */
497
498 if (!strcmp(data, "stop"))
499 pktgen_stop_all_threads_ifs();
500
501 else if (!strcmp(data, "start"))
502 pktgen_run_all_threads();
503
504 else if (!strcmp(data, "reset"))
505 pktgen_reset_all_threads();
506
507 else
508 pr_warning("Unknown command: %s\n", data);
509
510 err = count;
511
512 out:
513 return err;
514 }
515
516 static int pgctrl_open(struct inode *inode, struct file *file)
517 {
518 return single_open(file, pgctrl_show, PDE(inode)->data);
519 }
520
521 static const struct file_operations pktgen_fops = {
522 .owner = THIS_MODULE,
523 .open = pgctrl_open,
524 .read = seq_read,
525 .llseek = seq_lseek,
526 .write = pgctrl_write,
527 .release = single_release,
528 };
529
530 static int pktgen_if_show(struct seq_file *seq, void *v)
531 {
532 const struct pktgen_dev *pkt_dev = seq->private;
533 ktime_t stopped;
534 u64 idle;
535
536 seq_printf(seq,
537 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
538 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
539 pkt_dev->max_pkt_size);
540
541 seq_printf(seq,
542 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
543 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
544 pkt_dev->clone_skb, pkt_dev->odevname);
545
546 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
547 pkt_dev->lflow);
548
549 seq_printf(seq,
550 " queue_map_min: %u queue_map_max: %u\n",
551 pkt_dev->queue_map_min,
552 pkt_dev->queue_map_max);
553
554 if (pkt_dev->skb_priority)
555 seq_printf(seq, " skb_priority: %u\n",
556 pkt_dev->skb_priority);
557
558 if (pkt_dev->flags & F_IPV6) {
559 seq_printf(seq,
560 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
561 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
562 &pkt_dev->in6_saddr,
563 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
564 &pkt_dev->in6_daddr,
565 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
566 } else {
567 seq_printf(seq,
568 " dst_min: %s dst_max: %s\n",
569 pkt_dev->dst_min, pkt_dev->dst_max);
570 seq_printf(seq,
571 " src_min: %s src_max: %s\n",
572 pkt_dev->src_min, pkt_dev->src_max);
573 }
574
575 seq_puts(seq, " src_mac: ");
576
577 seq_printf(seq, "%pM ",
578 is_zero_ether_addr(pkt_dev->src_mac) ?
579 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
580
581 seq_printf(seq, "dst_mac: ");
582 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
583
584 seq_printf(seq,
585 " udp_src_min: %d udp_src_max: %d"
586 " udp_dst_min: %d udp_dst_max: %d\n",
587 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
588 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
589
590 seq_printf(seq,
591 " src_mac_count: %d dst_mac_count: %d\n",
592 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
593
594 if (pkt_dev->nr_labels) {
595 unsigned i;
596 seq_printf(seq, " mpls: ");
597 for (i = 0; i < pkt_dev->nr_labels; i++)
598 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
599 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
600 }
601
602 if (pkt_dev->vlan_id != 0xffff)
603 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
604 pkt_dev->vlan_id, pkt_dev->vlan_p,
605 pkt_dev->vlan_cfi);
606
607 if (pkt_dev->svlan_id != 0xffff)
608 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
609 pkt_dev->svlan_id, pkt_dev->svlan_p,
610 pkt_dev->svlan_cfi);
611
612 if (pkt_dev->tos)
613 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
614
615 if (pkt_dev->traffic_class)
616 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
617
618 if (pkt_dev->node >= 0)
619 seq_printf(seq, " node: %d\n", pkt_dev->node);
620
621 seq_printf(seq, " Flags: ");
622
623 if (pkt_dev->flags & F_IPV6)
624 seq_printf(seq, "IPV6 ");
625
626 if (pkt_dev->flags & F_IPSRC_RND)
627 seq_printf(seq, "IPSRC_RND ");
628
629 if (pkt_dev->flags & F_IPDST_RND)
630 seq_printf(seq, "IPDST_RND ");
631
632 if (pkt_dev->flags & F_TXSIZE_RND)
633 seq_printf(seq, "TXSIZE_RND ");
634
635 if (pkt_dev->flags & F_UDPSRC_RND)
636 seq_printf(seq, "UDPSRC_RND ");
637
638 if (pkt_dev->flags & F_UDPDST_RND)
639 seq_printf(seq, "UDPDST_RND ");
640
641 if (pkt_dev->flags & F_MPLS_RND)
642 seq_printf(seq, "MPLS_RND ");
643
644 if (pkt_dev->flags & F_QUEUE_MAP_RND)
645 seq_printf(seq, "QUEUE_MAP_RND ");
646
647 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
648 seq_printf(seq, "QUEUE_MAP_CPU ");
649
650 if (pkt_dev->cflows) {
651 if (pkt_dev->flags & F_FLOW_SEQ)
652 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
653 else
654 seq_printf(seq, "FLOW_RND ");
655 }
656
657 #ifdef CONFIG_XFRM
658 if (pkt_dev->flags & F_IPSEC_ON)
659 seq_printf(seq, "IPSEC ");
660 #endif
661
662 if (pkt_dev->flags & F_MACSRC_RND)
663 seq_printf(seq, "MACSRC_RND ");
664
665 if (pkt_dev->flags & F_MACDST_RND)
666 seq_printf(seq, "MACDST_RND ");
667
668 if (pkt_dev->flags & F_VID_RND)
669 seq_printf(seq, "VID_RND ");
670
671 if (pkt_dev->flags & F_SVID_RND)
672 seq_printf(seq, "SVID_RND ");
673
674 if (pkt_dev->flags & F_NODE)
675 seq_printf(seq, "NODE_ALLOC ");
676
677 seq_puts(seq, "\n");
678
679 /* not really stopped, more like last-running-at */
680 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at;
681 idle = pkt_dev->idle_acc;
682 do_div(idle, NSEC_PER_USEC);
683
684 seq_printf(seq,
685 "Current:\n pkts-sofar: %llu errors: %llu\n",
686 (unsigned long long)pkt_dev->sofar,
687 (unsigned long long)pkt_dev->errors);
688
689 seq_printf(seq,
690 " started: %lluus stopped: %lluus idle: %lluus\n",
691 (unsigned long long) ktime_to_us(pkt_dev->started_at),
692 (unsigned long long) ktime_to_us(stopped),
693 (unsigned long long) idle);
694
695 seq_printf(seq,
696 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
697 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
698 pkt_dev->cur_src_mac_offset);
699
700 if (pkt_dev->flags & F_IPV6) {
701 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
702 &pkt_dev->cur_in6_saddr,
703 &pkt_dev->cur_in6_daddr);
704 } else
705 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
706 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
707
708 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
709 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
710
711 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
712
713 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
714
715 if (pkt_dev->result[0])
716 seq_printf(seq, "Result: %s\n", pkt_dev->result);
717 else
718 seq_printf(seq, "Result: Idle\n");
719
720 return 0;
721 }
722
723
724 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
725 __u32 *num)
726 {
727 int i = 0;
728 *num = 0;
729
730 for (; i < maxlen; i++) {
731 int value;
732 char c;
733 *num <<= 4;
734 if (get_user(c, &user_buffer[i]))
735 return -EFAULT;
736 value = hex_to_bin(c);
737 if (value >= 0)
738 *num |= value;
739 else
740 break;
741 }
742 return i;
743 }
744
745 static int count_trail_chars(const char __user * user_buffer,
746 unsigned int maxlen)
747 {
748 int i;
749
750 for (i = 0; i < maxlen; i++) {
751 char c;
752 if (get_user(c, &user_buffer[i]))
753 return -EFAULT;
754 switch (c) {
755 case '\"':
756 case '\n':
757 case '\r':
758 case '\t':
759 case ' ':
760 case '=':
761 break;
762 default:
763 goto done;
764 }
765 }
766 done:
767 return i;
768 }
769
770 static unsigned long num_arg(const char __user * user_buffer,
771 unsigned long maxlen, unsigned long *num)
772 {
773 int i;
774 *num = 0;
775
776 for (i = 0; i < maxlen; i++) {
777 char c;
778 if (get_user(c, &user_buffer[i]))
779 return -EFAULT;
780 if ((c >= '0') && (c <= '9')) {
781 *num *= 10;
782 *num += c - '0';
783 } else
784 break;
785 }
786 return i;
787 }
788
789 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
790 {
791 int i;
792
793 for (i = 0; i < maxlen; i++) {
794 char c;
795 if (get_user(c, &user_buffer[i]))
796 return -EFAULT;
797 switch (c) {
798 case '\"':
799 case '\n':
800 case '\r':
801 case '\t':
802 case ' ':
803 goto done_str;
804 break;
805 default:
806 break;
807 }
808 }
809 done_str:
810 return i;
811 }
812
813 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
814 {
815 unsigned n = 0;
816 char c;
817 ssize_t i = 0;
818 int len;
819
820 pkt_dev->nr_labels = 0;
821 do {
822 __u32 tmp;
823 len = hex32_arg(&buffer[i], 8, &tmp);
824 if (len <= 0)
825 return len;
826 pkt_dev->labels[n] = htonl(tmp);
827 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
828 pkt_dev->flags |= F_MPLS_RND;
829 i += len;
830 if (get_user(c, &buffer[i]))
831 return -EFAULT;
832 i++;
833 n++;
834 if (n >= MAX_MPLS_LABELS)
835 return -E2BIG;
836 } while (c == ',');
837
838 pkt_dev->nr_labels = n;
839 return i;
840 }
841
842 static ssize_t pktgen_if_write(struct file *file,
843 const char __user * user_buffer, size_t count,
844 loff_t * offset)
845 {
846 struct seq_file *seq = file->private_data;
847 struct pktgen_dev *pkt_dev = seq->private;
848 int i, max, len;
849 char name[16], valstr[32];
850 unsigned long value = 0;
851 char *pg_result = NULL;
852 int tmp = 0;
853 char buf[128];
854
855 pg_result = &(pkt_dev->result[0]);
856
857 if (count < 1) {
858 pr_warning("wrong command format\n");
859 return -EINVAL;
860 }
861
862 max = count;
863 tmp = count_trail_chars(user_buffer, max);
864 if (tmp < 0) {
865 pr_warning("illegal format\n");
866 return tmp;
867 }
868 i = tmp;
869
870 /* Read variable name */
871
872 len = strn_len(&user_buffer[i], sizeof(name) - 1);
873 if (len < 0)
874 return len;
875
876 memset(name, 0, sizeof(name));
877 if (copy_from_user(name, &user_buffer[i], len))
878 return -EFAULT;
879 i += len;
880
881 max = count - i;
882 len = count_trail_chars(&user_buffer[i], max);
883 if (len < 0)
884 return len;
885
886 i += len;
887
888 if (debug) {
889 size_t copy = min_t(size_t, count, 1023);
890 char tb[copy + 1];
891 if (copy_from_user(tb, user_buffer, copy))
892 return -EFAULT;
893 tb[copy] = 0;
894 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name,
895 (unsigned long)count, tb);
896 }
897
898 if (!strcmp(name, "min_pkt_size")) {
899 len = num_arg(&user_buffer[i], 10, &value);
900 if (len < 0)
901 return len;
902
903 i += len;
904 if (value < 14 + 20 + 8)
905 value = 14 + 20 + 8;
906 if (value != pkt_dev->min_pkt_size) {
907 pkt_dev->min_pkt_size = value;
908 pkt_dev->cur_pkt_size = value;
909 }
910 sprintf(pg_result, "OK: min_pkt_size=%u",
911 pkt_dev->min_pkt_size);
912 return count;
913 }
914
915 if (!strcmp(name, "max_pkt_size")) {
916 len = num_arg(&user_buffer[i], 10, &value);
917 if (len < 0)
918 return len;
919
920 i += len;
921 if (value < 14 + 20 + 8)
922 value = 14 + 20 + 8;
923 if (value != pkt_dev->max_pkt_size) {
924 pkt_dev->max_pkt_size = value;
925 pkt_dev->cur_pkt_size = value;
926 }
927 sprintf(pg_result, "OK: max_pkt_size=%u",
928 pkt_dev->max_pkt_size);
929 return count;
930 }
931
932 /* Shortcut for min = max */
933
934 if (!strcmp(name, "pkt_size")) {
935 len = num_arg(&user_buffer[i], 10, &value);
936 if (len < 0)
937 return len;
938
939 i += len;
940 if (value < 14 + 20 + 8)
941 value = 14 + 20 + 8;
942 if (value != pkt_dev->min_pkt_size) {
943 pkt_dev->min_pkt_size = value;
944 pkt_dev->max_pkt_size = value;
945 pkt_dev->cur_pkt_size = value;
946 }
947 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
948 return count;
949 }
950
951 if (!strcmp(name, "debug")) {
952 len = num_arg(&user_buffer[i], 10, &value);
953 if (len < 0)
954 return len;
955
956 i += len;
957 debug = value;
958 sprintf(pg_result, "OK: debug=%u", debug);
959 return count;
960 }
961
962 if (!strcmp(name, "frags")) {
963 len = num_arg(&user_buffer[i], 10, &value);
964 if (len < 0)
965 return len;
966
967 i += len;
968 pkt_dev->nfrags = value;
969 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
970 return count;
971 }
972 if (!strcmp(name, "delay")) {
973 len = num_arg(&user_buffer[i], 10, &value);
974 if (len < 0)
975 return len;
976
977 i += len;
978 if (value == 0x7FFFFFFF)
979 pkt_dev->delay = ULLONG_MAX;
980 else
981 pkt_dev->delay = (u64)value;
982
983 sprintf(pg_result, "OK: delay=%llu",
984 (unsigned long long) pkt_dev->delay);
985 return count;
986 }
987 if (!strcmp(name, "rate")) {
988 len = num_arg(&user_buffer[i], 10, &value);
989 if (len < 0)
990 return len;
991
992 i += len;
993 if (!value)
994 return len;
995 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
996 if (debug)
997 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
998
999 sprintf(pg_result, "OK: rate=%lu", value);
1000 return count;
1001 }
1002 if (!strcmp(name, "ratep")) {
1003 len = num_arg(&user_buffer[i], 10, &value);
1004 if (len < 0)
1005 return len;
1006
1007 i += len;
1008 if (!value)
1009 return len;
1010 pkt_dev->delay = NSEC_PER_SEC/value;
1011 if (debug)
1012 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1013
1014 sprintf(pg_result, "OK: rate=%lu", value);
1015 return count;
1016 }
1017 if (!strcmp(name, "udp_src_min")) {
1018 len = num_arg(&user_buffer[i], 10, &value);
1019 if (len < 0)
1020 return len;
1021
1022 i += len;
1023 if (value != pkt_dev->udp_src_min) {
1024 pkt_dev->udp_src_min = value;
1025 pkt_dev->cur_udp_src = value;
1026 }
1027 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1028 return count;
1029 }
1030 if (!strcmp(name, "udp_dst_min")) {
1031 len = num_arg(&user_buffer[i], 10, &value);
1032 if (len < 0)
1033 return len;
1034
1035 i += len;
1036 if (value != pkt_dev->udp_dst_min) {
1037 pkt_dev->udp_dst_min = value;
1038 pkt_dev->cur_udp_dst = value;
1039 }
1040 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1041 return count;
1042 }
1043 if (!strcmp(name, "udp_src_max")) {
1044 len = num_arg(&user_buffer[i], 10, &value);
1045 if (len < 0)
1046 return len;
1047
1048 i += len;
1049 if (value != pkt_dev->udp_src_max) {
1050 pkt_dev->udp_src_max = value;
1051 pkt_dev->cur_udp_src = value;
1052 }
1053 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1054 return count;
1055 }
1056 if (!strcmp(name, "udp_dst_max")) {
1057 len = num_arg(&user_buffer[i], 10, &value);
1058 if (len < 0)
1059 return len;
1060
1061 i += len;
1062 if (value != pkt_dev->udp_dst_max) {
1063 pkt_dev->udp_dst_max = value;
1064 pkt_dev->cur_udp_dst = value;
1065 }
1066 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1067 return count;
1068 }
1069 if (!strcmp(name, "clone_skb")) {
1070 len = num_arg(&user_buffer[i], 10, &value);
1071 if (len < 0)
1072 return len;
1073
1074 i += len;
1075 pkt_dev->clone_skb = value;
1076
1077 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1078 return count;
1079 }
1080 if (!strcmp(name, "count")) {
1081 len = num_arg(&user_buffer[i], 10, &value);
1082 if (len < 0)
1083 return len;
1084
1085 i += len;
1086 pkt_dev->count = value;
1087 sprintf(pg_result, "OK: count=%llu",
1088 (unsigned long long)pkt_dev->count);
1089 return count;
1090 }
1091 if (!strcmp(name, "src_mac_count")) {
1092 len = num_arg(&user_buffer[i], 10, &value);
1093 if (len < 0)
1094 return len;
1095
1096 i += len;
1097 if (pkt_dev->src_mac_count != value) {
1098 pkt_dev->src_mac_count = value;
1099 pkt_dev->cur_src_mac_offset = 0;
1100 }
1101 sprintf(pg_result, "OK: src_mac_count=%d",
1102 pkt_dev->src_mac_count);
1103 return count;
1104 }
1105 if (!strcmp(name, "dst_mac_count")) {
1106 len = num_arg(&user_buffer[i], 10, &value);
1107 if (len < 0)
1108 return len;
1109
1110 i += len;
1111 if (pkt_dev->dst_mac_count != value) {
1112 pkt_dev->dst_mac_count = value;
1113 pkt_dev->cur_dst_mac_offset = 0;
1114 }
1115 sprintf(pg_result, "OK: dst_mac_count=%d",
1116 pkt_dev->dst_mac_count);
1117 return count;
1118 }
1119 if (!strcmp(name, "node")) {
1120 len = num_arg(&user_buffer[i], 10, &value);
1121 if (len < 0)
1122 return len;
1123
1124 i += len;
1125
1126 if (node_possible(value)) {
1127 pkt_dev->node = value;
1128 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1129 if (pkt_dev->page) {
1130 put_page(pkt_dev->page);
1131 pkt_dev->page = NULL;
1132 }
1133 }
1134 else
1135 sprintf(pg_result, "ERROR: node not possible");
1136 return count;
1137 }
1138 if (!strcmp(name, "flag")) {
1139 char f[32];
1140 memset(f, 0, 32);
1141 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1142 if (len < 0)
1143 return len;
1144
1145 if (copy_from_user(f, &user_buffer[i], len))
1146 return -EFAULT;
1147 i += len;
1148 if (strcmp(f, "IPSRC_RND") == 0)
1149 pkt_dev->flags |= F_IPSRC_RND;
1150
1151 else if (strcmp(f, "!IPSRC_RND") == 0)
1152 pkt_dev->flags &= ~F_IPSRC_RND;
1153
1154 else if (strcmp(f, "TXSIZE_RND") == 0)
1155 pkt_dev->flags |= F_TXSIZE_RND;
1156
1157 else if (strcmp(f, "!TXSIZE_RND") == 0)
1158 pkt_dev->flags &= ~F_TXSIZE_RND;
1159
1160 else if (strcmp(f, "IPDST_RND") == 0)
1161 pkt_dev->flags |= F_IPDST_RND;
1162
1163 else if (strcmp(f, "!IPDST_RND") == 0)
1164 pkt_dev->flags &= ~F_IPDST_RND;
1165
1166 else if (strcmp(f, "UDPSRC_RND") == 0)
1167 pkt_dev->flags |= F_UDPSRC_RND;
1168
1169 else if (strcmp(f, "!UDPSRC_RND") == 0)
1170 pkt_dev->flags &= ~F_UDPSRC_RND;
1171
1172 else if (strcmp(f, "UDPDST_RND") == 0)
1173 pkt_dev->flags |= F_UDPDST_RND;
1174
1175 else if (strcmp(f, "!UDPDST_RND") == 0)
1176 pkt_dev->flags &= ~F_UDPDST_RND;
1177
1178 else if (strcmp(f, "MACSRC_RND") == 0)
1179 pkt_dev->flags |= F_MACSRC_RND;
1180
1181 else if (strcmp(f, "!MACSRC_RND") == 0)
1182 pkt_dev->flags &= ~F_MACSRC_RND;
1183
1184 else if (strcmp(f, "MACDST_RND") == 0)
1185 pkt_dev->flags |= F_MACDST_RND;
1186
1187 else if (strcmp(f, "!MACDST_RND") == 0)
1188 pkt_dev->flags &= ~F_MACDST_RND;
1189
1190 else if (strcmp(f, "MPLS_RND") == 0)
1191 pkt_dev->flags |= F_MPLS_RND;
1192
1193 else if (strcmp(f, "!MPLS_RND") == 0)
1194 pkt_dev->flags &= ~F_MPLS_RND;
1195
1196 else if (strcmp(f, "VID_RND") == 0)
1197 pkt_dev->flags |= F_VID_RND;
1198
1199 else if (strcmp(f, "!VID_RND") == 0)
1200 pkt_dev->flags &= ~F_VID_RND;
1201
1202 else if (strcmp(f, "SVID_RND") == 0)
1203 pkt_dev->flags |= F_SVID_RND;
1204
1205 else if (strcmp(f, "!SVID_RND") == 0)
1206 pkt_dev->flags &= ~F_SVID_RND;
1207
1208 else if (strcmp(f, "FLOW_SEQ") == 0)
1209 pkt_dev->flags |= F_FLOW_SEQ;
1210
1211 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1212 pkt_dev->flags |= F_QUEUE_MAP_RND;
1213
1214 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1215 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1216
1217 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1218 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1219
1220 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1221 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1222 #ifdef CONFIG_XFRM
1223 else if (strcmp(f, "IPSEC") == 0)
1224 pkt_dev->flags |= F_IPSEC_ON;
1225 #endif
1226
1227 else if (strcmp(f, "!IPV6") == 0)
1228 pkt_dev->flags &= ~F_IPV6;
1229
1230 else if (strcmp(f, "NODE_ALLOC") == 0)
1231 pkt_dev->flags |= F_NODE;
1232
1233 else if (strcmp(f, "!NODE_ALLOC") == 0)
1234 pkt_dev->flags &= ~F_NODE;
1235
1236 else {
1237 sprintf(pg_result,
1238 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1239 f,
1240 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1241 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n");
1242 return count;
1243 }
1244 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1245 return count;
1246 }
1247 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1248 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1249 if (len < 0)
1250 return len;
1251
1252 if (copy_from_user(buf, &user_buffer[i], len))
1253 return -EFAULT;
1254 buf[len] = 0;
1255 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1256 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1257 strncpy(pkt_dev->dst_min, buf, len);
1258 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1259 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1260 }
1261 if (debug)
1262 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1263 pkt_dev->dst_min);
1264 i += len;
1265 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1266 return count;
1267 }
1268 if (!strcmp(name, "dst_max")) {
1269 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1270 if (len < 0)
1271 return len;
1272
1273
1274 if (copy_from_user(buf, &user_buffer[i], len))
1275 return -EFAULT;
1276
1277 buf[len] = 0;
1278 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1279 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1280 strncpy(pkt_dev->dst_max, buf, len);
1281 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1282 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1283 }
1284 if (debug)
1285 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1286 pkt_dev->dst_max);
1287 i += len;
1288 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1289 return count;
1290 }
1291 if (!strcmp(name, "dst6")) {
1292 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1293 if (len < 0)
1294 return len;
1295
1296 pkt_dev->flags |= F_IPV6;
1297
1298 if (copy_from_user(buf, &user_buffer[i], len))
1299 return -EFAULT;
1300 buf[len] = 0;
1301
1302 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1303 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1304
1305 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1306
1307 if (debug)
1308 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1309
1310 i += len;
1311 sprintf(pg_result, "OK: dst6=%s", buf);
1312 return count;
1313 }
1314 if (!strcmp(name, "dst6_min")) {
1315 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1316 if (len < 0)
1317 return len;
1318
1319 pkt_dev->flags |= F_IPV6;
1320
1321 if (copy_from_user(buf, &user_buffer[i], len))
1322 return -EFAULT;
1323 buf[len] = 0;
1324
1325 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1326 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1327
1328 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1329 &pkt_dev->min_in6_daddr);
1330 if (debug)
1331 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1332
1333 i += len;
1334 sprintf(pg_result, "OK: dst6_min=%s", buf);
1335 return count;
1336 }
1337 if (!strcmp(name, "dst6_max")) {
1338 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1339 if (len < 0)
1340 return len;
1341
1342 pkt_dev->flags |= F_IPV6;
1343
1344 if (copy_from_user(buf, &user_buffer[i], len))
1345 return -EFAULT;
1346 buf[len] = 0;
1347
1348 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1349 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1350
1351 if (debug)
1352 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1353
1354 i += len;
1355 sprintf(pg_result, "OK: dst6_max=%s", buf);
1356 return count;
1357 }
1358 if (!strcmp(name, "src6")) {
1359 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1360 if (len < 0)
1361 return len;
1362
1363 pkt_dev->flags |= F_IPV6;
1364
1365 if (copy_from_user(buf, &user_buffer[i], len))
1366 return -EFAULT;
1367 buf[len] = 0;
1368
1369 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1370 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1371
1372 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1373
1374 if (debug)
1375 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1376
1377 i += len;
1378 sprintf(pg_result, "OK: src6=%s", buf);
1379 return count;
1380 }
1381 if (!strcmp(name, "src_min")) {
1382 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1383 if (len < 0)
1384 return len;
1385
1386 if (copy_from_user(buf, &user_buffer[i], len))
1387 return -EFAULT;
1388 buf[len] = 0;
1389 if (strcmp(buf, pkt_dev->src_min) != 0) {
1390 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1391 strncpy(pkt_dev->src_min, buf, len);
1392 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1393 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1394 }
1395 if (debug)
1396 printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1397 pkt_dev->src_min);
1398 i += len;
1399 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1400 return count;
1401 }
1402 if (!strcmp(name, "src_max")) {
1403 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1404 if (len < 0)
1405 return len;
1406
1407 if (copy_from_user(buf, &user_buffer[i], len))
1408 return -EFAULT;
1409 buf[len] = 0;
1410 if (strcmp(buf, pkt_dev->src_max) != 0) {
1411 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1412 strncpy(pkt_dev->src_max, buf, len);
1413 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1414 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1415 }
1416 if (debug)
1417 printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1418 pkt_dev->src_max);
1419 i += len;
1420 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1421 return count;
1422 }
1423 if (!strcmp(name, "dst_mac")) {
1424 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1425 if (len < 0)
1426 return len;
1427
1428 memset(valstr, 0, sizeof(valstr));
1429 if (copy_from_user(valstr, &user_buffer[i], len))
1430 return -EFAULT;
1431
1432 if (!mac_pton(valstr, pkt_dev->dst_mac))
1433 return -EINVAL;
1434 /* Set up Dest MAC */
1435 memcpy(&pkt_dev->hh[0], pkt_dev->dst_mac, ETH_ALEN);
1436
1437 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1438 return count;
1439 }
1440 if (!strcmp(name, "src_mac")) {
1441 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1442 if (len < 0)
1443 return len;
1444
1445 memset(valstr, 0, sizeof(valstr));
1446 if (copy_from_user(valstr, &user_buffer[i], len))
1447 return -EFAULT;
1448
1449 if (!mac_pton(valstr, pkt_dev->src_mac))
1450 return -EINVAL;
1451 /* Set up Src MAC */
1452 memcpy(&pkt_dev->hh[6], pkt_dev->src_mac, ETH_ALEN);
1453
1454 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1455 return count;
1456 }
1457
1458 if (!strcmp(name, "clear_counters")) {
1459 pktgen_clear_counters(pkt_dev);
1460 sprintf(pg_result, "OK: Clearing counters.\n");
1461 return count;
1462 }
1463
1464 if (!strcmp(name, "flows")) {
1465 len = num_arg(&user_buffer[i], 10, &value);
1466 if (len < 0)
1467 return len;
1468
1469 i += len;
1470 if (value > MAX_CFLOWS)
1471 value = MAX_CFLOWS;
1472
1473 pkt_dev->cflows = value;
1474 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1475 return count;
1476 }
1477
1478 if (!strcmp(name, "flowlen")) {
1479 len = num_arg(&user_buffer[i], 10, &value);
1480 if (len < 0)
1481 return len;
1482
1483 i += len;
1484 pkt_dev->lflow = value;
1485 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1486 return count;
1487 }
1488
1489 if (!strcmp(name, "queue_map_min")) {
1490 len = num_arg(&user_buffer[i], 5, &value);
1491 if (len < 0)
1492 return len;
1493
1494 i += len;
1495 pkt_dev->queue_map_min = value;
1496 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1497 return count;
1498 }
1499
1500 if (!strcmp(name, "queue_map_max")) {
1501 len = num_arg(&user_buffer[i], 5, &value);
1502 if (len < 0)
1503 return len;
1504
1505 i += len;
1506 pkt_dev->queue_map_max = value;
1507 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1508 return count;
1509 }
1510
1511 if (!strcmp(name, "mpls")) {
1512 unsigned n, cnt;
1513
1514 len = get_labels(&user_buffer[i], pkt_dev);
1515 if (len < 0)
1516 return len;
1517 i += len;
1518 cnt = sprintf(pg_result, "OK: mpls=");
1519 for (n = 0; n < pkt_dev->nr_labels; n++)
1520 cnt += sprintf(pg_result + cnt,
1521 "%08x%s", ntohl(pkt_dev->labels[n]),
1522 n == pkt_dev->nr_labels-1 ? "" : ",");
1523
1524 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1525 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1526 pkt_dev->svlan_id = 0xffff;
1527
1528 if (debug)
1529 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1530 }
1531 return count;
1532 }
1533
1534 if (!strcmp(name, "vlan_id")) {
1535 len = num_arg(&user_buffer[i], 4, &value);
1536 if (len < 0)
1537 return len;
1538
1539 i += len;
1540 if (value <= 4095) {
1541 pkt_dev->vlan_id = value; /* turn on VLAN */
1542
1543 if (debug)
1544 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1545
1546 if (debug && pkt_dev->nr_labels)
1547 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1548
1549 pkt_dev->nr_labels = 0; /* turn off MPLS */
1550 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1551 } else {
1552 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1553 pkt_dev->svlan_id = 0xffff;
1554
1555 if (debug)
1556 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1557 }
1558 return count;
1559 }
1560
1561 if (!strcmp(name, "vlan_p")) {
1562 len = num_arg(&user_buffer[i], 1, &value);
1563 if (len < 0)
1564 return len;
1565
1566 i += len;
1567 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1568 pkt_dev->vlan_p = value;
1569 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1570 } else {
1571 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1572 }
1573 return count;
1574 }
1575
1576 if (!strcmp(name, "vlan_cfi")) {
1577 len = num_arg(&user_buffer[i], 1, &value);
1578 if (len < 0)
1579 return len;
1580
1581 i += len;
1582 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1583 pkt_dev->vlan_cfi = value;
1584 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1585 } else {
1586 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1587 }
1588 return count;
1589 }
1590
1591 if (!strcmp(name, "svlan_id")) {
1592 len = num_arg(&user_buffer[i], 4, &value);
1593 if (len < 0)
1594 return len;
1595
1596 i += len;
1597 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1598 pkt_dev->svlan_id = value; /* turn on SVLAN */
1599
1600 if (debug)
1601 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1602
1603 if (debug && pkt_dev->nr_labels)
1604 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1605
1606 pkt_dev->nr_labels = 0; /* turn off MPLS */
1607 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1608 } else {
1609 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1610 pkt_dev->svlan_id = 0xffff;
1611
1612 if (debug)
1613 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1614 }
1615 return count;
1616 }
1617
1618 if (!strcmp(name, "svlan_p")) {
1619 len = num_arg(&user_buffer[i], 1, &value);
1620 if (len < 0)
1621 return len;
1622
1623 i += len;
1624 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1625 pkt_dev->svlan_p = value;
1626 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1627 } else {
1628 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1629 }
1630 return count;
1631 }
1632
1633 if (!strcmp(name, "svlan_cfi")) {
1634 len = num_arg(&user_buffer[i], 1, &value);
1635 if (len < 0)
1636 return len;
1637
1638 i += len;
1639 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1640 pkt_dev->svlan_cfi = value;
1641 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1642 } else {
1643 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1644 }
1645 return count;
1646 }
1647
1648 if (!strcmp(name, "tos")) {
1649 __u32 tmp_value = 0;
1650 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1651 if (len < 0)
1652 return len;
1653
1654 i += len;
1655 if (len == 2) {
1656 pkt_dev->tos = tmp_value;
1657 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1658 } else {
1659 sprintf(pg_result, "ERROR: tos must be 00-ff");
1660 }
1661 return count;
1662 }
1663
1664 if (!strcmp(name, "traffic_class")) {
1665 __u32 tmp_value = 0;
1666 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1667 if (len < 0)
1668 return len;
1669
1670 i += len;
1671 if (len == 2) {
1672 pkt_dev->traffic_class = tmp_value;
1673 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1674 } else {
1675 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1676 }
1677 return count;
1678 }
1679
1680 if (!strcmp(name, "skb_priority")) {
1681 len = num_arg(&user_buffer[i], 9, &value);
1682 if (len < 0)
1683 return len;
1684
1685 i += len;
1686 pkt_dev->skb_priority = value;
1687 sprintf(pg_result, "OK: skb_priority=%i",
1688 pkt_dev->skb_priority);
1689 return count;
1690 }
1691
1692 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1693 return -EINVAL;
1694 }
1695
1696 static int pktgen_if_open(struct inode *inode, struct file *file)
1697 {
1698 return single_open(file, pktgen_if_show, PDE(inode)->data);
1699 }
1700
1701 static const struct file_operations pktgen_if_fops = {
1702 .owner = THIS_MODULE,
1703 .open = pktgen_if_open,
1704 .read = seq_read,
1705 .llseek = seq_lseek,
1706 .write = pktgen_if_write,
1707 .release = single_release,
1708 };
1709
1710 static int pktgen_thread_show(struct seq_file *seq, void *v)
1711 {
1712 struct pktgen_thread *t = seq->private;
1713 const struct pktgen_dev *pkt_dev;
1714
1715 BUG_ON(!t);
1716
1717 seq_printf(seq, "Running: ");
1718
1719 if_lock(t);
1720 list_for_each_entry(pkt_dev, &t->if_list, list)
1721 if (pkt_dev->running)
1722 seq_printf(seq, "%s ", pkt_dev->odevname);
1723
1724 seq_printf(seq, "\nStopped: ");
1725
1726 list_for_each_entry(pkt_dev, &t->if_list, list)
1727 if (!pkt_dev->running)
1728 seq_printf(seq, "%s ", pkt_dev->odevname);
1729
1730 if (t->result[0])
1731 seq_printf(seq, "\nResult: %s\n", t->result);
1732 else
1733 seq_printf(seq, "\nResult: NA\n");
1734
1735 if_unlock(t);
1736
1737 return 0;
1738 }
1739
1740 static ssize_t pktgen_thread_write(struct file *file,
1741 const char __user * user_buffer,
1742 size_t count, loff_t * offset)
1743 {
1744 struct seq_file *seq = file->private_data;
1745 struct pktgen_thread *t = seq->private;
1746 int i, max, len, ret;
1747 char name[40];
1748 char *pg_result;
1749
1750 if (count < 1) {
1751 // sprintf(pg_result, "Wrong command format");
1752 return -EINVAL;
1753 }
1754
1755 max = count;
1756 len = count_trail_chars(user_buffer, max);
1757 if (len < 0)
1758 return len;
1759
1760 i = len;
1761
1762 /* Read variable name */
1763
1764 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1765 if (len < 0)
1766 return len;
1767
1768 memset(name, 0, sizeof(name));
1769 if (copy_from_user(name, &user_buffer[i], len))
1770 return -EFAULT;
1771 i += len;
1772
1773 max = count - i;
1774 len = count_trail_chars(&user_buffer[i], max);
1775 if (len < 0)
1776 return len;
1777
1778 i += len;
1779
1780 if (debug)
1781 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1782 name, (unsigned long)count);
1783
1784 if (!t) {
1785 pr_err("ERROR: No thread\n");
1786 ret = -EINVAL;
1787 goto out;
1788 }
1789
1790 pg_result = &(t->result[0]);
1791
1792 if (!strcmp(name, "add_device")) {
1793 char f[32];
1794 memset(f, 0, 32);
1795 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1796 if (len < 0) {
1797 ret = len;
1798 goto out;
1799 }
1800 if (copy_from_user(f, &user_buffer[i], len))
1801 return -EFAULT;
1802 i += len;
1803 mutex_lock(&pktgen_thread_lock);
1804 pktgen_add_device(t, f);
1805 mutex_unlock(&pktgen_thread_lock);
1806 ret = count;
1807 sprintf(pg_result, "OK: add_device=%s", f);
1808 goto out;
1809 }
1810
1811 if (!strcmp(name, "rem_device_all")) {
1812 mutex_lock(&pktgen_thread_lock);
1813 t->control |= T_REMDEVALL;
1814 mutex_unlock(&pktgen_thread_lock);
1815 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1816 ret = count;
1817 sprintf(pg_result, "OK: rem_device_all");
1818 goto out;
1819 }
1820
1821 if (!strcmp(name, "max_before_softirq")) {
1822 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1823 ret = count;
1824 goto out;
1825 }
1826
1827 ret = -EINVAL;
1828 out:
1829 return ret;
1830 }
1831
1832 static int pktgen_thread_open(struct inode *inode, struct file *file)
1833 {
1834 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1835 }
1836
1837 static const struct file_operations pktgen_thread_fops = {
1838 .owner = THIS_MODULE,
1839 .open = pktgen_thread_open,
1840 .read = seq_read,
1841 .llseek = seq_lseek,
1842 .write = pktgen_thread_write,
1843 .release = single_release,
1844 };
1845
1846 /* Think find or remove for NN */
1847 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1848 {
1849 struct pktgen_thread *t;
1850 struct pktgen_dev *pkt_dev = NULL;
1851 bool exact = (remove == FIND);
1852
1853 list_for_each_entry(t, &pktgen_threads, th_list) {
1854 pkt_dev = pktgen_find_dev(t, ifname, exact);
1855 if (pkt_dev) {
1856 if (remove) {
1857 if_lock(t);
1858 pkt_dev->removal_mark = 1;
1859 t->control |= T_REMDEV;
1860 if_unlock(t);
1861 }
1862 break;
1863 }
1864 }
1865 return pkt_dev;
1866 }
1867
1868 /*
1869 * mark a device for removal
1870 */
1871 static void pktgen_mark_device(const char *ifname)
1872 {
1873 struct pktgen_dev *pkt_dev = NULL;
1874 const int max_tries = 10, msec_per_try = 125;
1875 int i = 0;
1876
1877 mutex_lock(&pktgen_thread_lock);
1878 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1879
1880 while (1) {
1881
1882 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1883 if (pkt_dev == NULL)
1884 break; /* success */
1885
1886 mutex_unlock(&pktgen_thread_lock);
1887 pr_debug("%s: waiting for %s to disappear....\n",
1888 __func__, ifname);
1889 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1890 mutex_lock(&pktgen_thread_lock);
1891
1892 if (++i >= max_tries) {
1893 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1894 __func__, msec_per_try * i, ifname);
1895 break;
1896 }
1897
1898 }
1899
1900 mutex_unlock(&pktgen_thread_lock);
1901 }
1902
1903 static void pktgen_change_name(struct net_device *dev)
1904 {
1905 struct pktgen_thread *t;
1906
1907 list_for_each_entry(t, &pktgen_threads, th_list) {
1908 struct pktgen_dev *pkt_dev;
1909
1910 list_for_each_entry(pkt_dev, &t->if_list, list) {
1911 if (pkt_dev->odev != dev)
1912 continue;
1913
1914 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1915
1916 pkt_dev->entry = proc_create_data(dev->name, 0600,
1917 pg_proc_dir,
1918 &pktgen_if_fops,
1919 pkt_dev);
1920 if (!pkt_dev->entry)
1921 pr_err("can't move proc entry for '%s'\n",
1922 dev->name);
1923 break;
1924 }
1925 }
1926 }
1927
1928 static int pktgen_device_event(struct notifier_block *unused,
1929 unsigned long event, void *ptr)
1930 {
1931 struct net_device *dev = ptr;
1932
1933 if (!net_eq(dev_net(dev), &init_net))
1934 return NOTIFY_DONE;
1935
1936 /* It is OK that we do not hold the group lock right now,
1937 * as we run under the RTNL lock.
1938 */
1939
1940 switch (event) {
1941 case NETDEV_CHANGENAME:
1942 pktgen_change_name(dev);
1943 break;
1944
1945 case NETDEV_UNREGISTER:
1946 pktgen_mark_device(dev->name);
1947 break;
1948 }
1949
1950 return NOTIFY_DONE;
1951 }
1952
1953 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev,
1954 const char *ifname)
1955 {
1956 char b[IFNAMSIZ+5];
1957 int i;
1958
1959 for (i = 0; ifname[i] != '@'; i++) {
1960 if (i == IFNAMSIZ)
1961 break;
1962
1963 b[i] = ifname[i];
1964 }
1965 b[i] = 0;
1966
1967 return dev_get_by_name(&init_net, b);
1968 }
1969
1970
1971 /* Associate pktgen_dev with a device. */
1972
1973 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1974 {
1975 struct net_device *odev;
1976 int err;
1977
1978 /* Clean old setups */
1979 if (pkt_dev->odev) {
1980 dev_put(pkt_dev->odev);
1981 pkt_dev->odev = NULL;
1982 }
1983
1984 odev = pktgen_dev_get_by_name(pkt_dev, ifname);
1985 if (!odev) {
1986 pr_err("no such netdevice: \"%s\"\n", ifname);
1987 return -ENODEV;
1988 }
1989
1990 if (odev->type != ARPHRD_ETHER) {
1991 pr_err("not an ethernet device: \"%s\"\n", ifname);
1992 err = -EINVAL;
1993 } else if (!netif_running(odev)) {
1994 pr_err("device is down: \"%s\"\n", ifname);
1995 err = -ENETDOWN;
1996 } else {
1997 pkt_dev->odev = odev;
1998 return 0;
1999 }
2000
2001 dev_put(odev);
2002 return err;
2003 }
2004
2005 /* Read pkt_dev from the interface and set up internal pktgen_dev
2006 * structure to have the right information to create/send packets
2007 */
2008 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2009 {
2010 int ntxq;
2011
2012 if (!pkt_dev->odev) {
2013 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2014 sprintf(pkt_dev->result,
2015 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2016 return;
2017 }
2018
2019 /* make sure that we don't pick a non-existing transmit queue */
2020 ntxq = pkt_dev->odev->real_num_tx_queues;
2021
2022 if (ntxq <= pkt_dev->queue_map_min) {
2023 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2024 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2025 pkt_dev->odevname);
2026 pkt_dev->queue_map_min = ntxq - 1;
2027 }
2028 if (pkt_dev->queue_map_max >= ntxq) {
2029 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2030 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2031 pkt_dev->odevname);
2032 pkt_dev->queue_map_max = ntxq - 1;
2033 }
2034
2035 /* Default to the interface's mac if not explicitly set. */
2036
2037 if (is_zero_ether_addr(pkt_dev->src_mac))
2038 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2039
2040 /* Set up Dest MAC */
2041 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2042
2043 /* Set up pkt size */
2044 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2045
2046 if (pkt_dev->flags & F_IPV6) {
2047 /*
2048 * Skip this automatic address setting until locks or functions
2049 * gets exported
2050 */
2051
2052 #ifdef NOTNOW
2053 int i, set = 0, err = 1;
2054 struct inet6_dev *idev;
2055
2056 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2057 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2058 set = 1;
2059 break;
2060 }
2061
2062 if (!set) {
2063
2064 /*
2065 * Use linklevel address if unconfigured.
2066 *
2067 * use ipv6_get_lladdr if/when it's get exported
2068 */
2069
2070 rcu_read_lock();
2071 idev = __in6_dev_get(pkt_dev->odev);
2072 if (idev) {
2073 struct inet6_ifaddr *ifp;
2074
2075 read_lock_bh(&idev->lock);
2076 for (ifp = idev->addr_list; ifp;
2077 ifp = ifp->if_next) {
2078 if (ifp->scope == IFA_LINK &&
2079 !(ifp->flags & IFA_F_TENTATIVE)) {
2080 ipv6_addr_copy(&pkt_dev->
2081 cur_in6_saddr,
2082 &ifp->addr);
2083 err = 0;
2084 break;
2085 }
2086 }
2087 read_unlock_bh(&idev->lock);
2088 }
2089 rcu_read_unlock();
2090 if (err)
2091 pr_err("ERROR: IPv6 link address not available\n");
2092 }
2093 #endif
2094 } else {
2095 pkt_dev->saddr_min = 0;
2096 pkt_dev->saddr_max = 0;
2097 if (strlen(pkt_dev->src_min) == 0) {
2098
2099 struct in_device *in_dev;
2100
2101 rcu_read_lock();
2102 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2103 if (in_dev) {
2104 if (in_dev->ifa_list) {
2105 pkt_dev->saddr_min =
2106 in_dev->ifa_list->ifa_address;
2107 pkt_dev->saddr_max = pkt_dev->saddr_min;
2108 }
2109 }
2110 rcu_read_unlock();
2111 } else {
2112 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2113 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2114 }
2115
2116 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2117 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2118 }
2119 /* Initialize current values. */
2120 pkt_dev->cur_dst_mac_offset = 0;
2121 pkt_dev->cur_src_mac_offset = 0;
2122 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2123 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2124 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2125 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2126 pkt_dev->nflows = 0;
2127 }
2128
2129
2130 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2131 {
2132 ktime_t start_time, end_time;
2133 s64 remaining;
2134 struct hrtimer_sleeper t;
2135
2136 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2137 hrtimer_set_expires(&t.timer, spin_until);
2138
2139 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2140 if (remaining <= 0) {
2141 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2142 return;
2143 }
2144
2145 start_time = ktime_now();
2146 if (remaining < 100000)
2147 ndelay(remaining); /* really small just spin */
2148 else {
2149 /* see do_nanosleep */
2150 hrtimer_init_sleeper(&t, current);
2151 do {
2152 set_current_state(TASK_INTERRUPTIBLE);
2153 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2154 if (!hrtimer_active(&t.timer))
2155 t.task = NULL;
2156
2157 if (likely(t.task))
2158 schedule();
2159
2160 hrtimer_cancel(&t.timer);
2161 } while (t.task && pkt_dev->running && !signal_pending(current));
2162 __set_current_state(TASK_RUNNING);
2163 }
2164 end_time = ktime_now();
2165
2166 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2167 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2168 }
2169
2170 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2171 {
2172 pkt_dev->pkt_overhead = 0;
2173 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2174 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2175 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2176 }
2177
2178 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2179 {
2180 return !!(pkt_dev->flows[flow].flags & F_INIT);
2181 }
2182
2183 static inline int f_pick(struct pktgen_dev *pkt_dev)
2184 {
2185 int flow = pkt_dev->curfl;
2186
2187 if (pkt_dev->flags & F_FLOW_SEQ) {
2188 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2189 /* reset time */
2190 pkt_dev->flows[flow].count = 0;
2191 pkt_dev->flows[flow].flags = 0;
2192 pkt_dev->curfl += 1;
2193 if (pkt_dev->curfl >= pkt_dev->cflows)
2194 pkt_dev->curfl = 0; /*reset */
2195 }
2196 } else {
2197 flow = random32() % pkt_dev->cflows;
2198 pkt_dev->curfl = flow;
2199
2200 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2201 pkt_dev->flows[flow].count = 0;
2202 pkt_dev->flows[flow].flags = 0;
2203 }
2204 }
2205
2206 return pkt_dev->curfl;
2207 }
2208
2209
2210 #ifdef CONFIG_XFRM
2211 /* If there was already an IPSEC SA, we keep it as is, else
2212 * we go look for it ...
2213 */
2214 #define DUMMY_MARK 0
2215 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2216 {
2217 struct xfrm_state *x = pkt_dev->flows[flow].x;
2218 if (!x) {
2219 /*slow path: we dont already have xfrm_state*/
2220 x = xfrm_stateonly_find(&init_net, DUMMY_MARK,
2221 (xfrm_address_t *)&pkt_dev->cur_daddr,
2222 (xfrm_address_t *)&pkt_dev->cur_saddr,
2223 AF_INET,
2224 pkt_dev->ipsmode,
2225 pkt_dev->ipsproto, 0);
2226 if (x) {
2227 pkt_dev->flows[flow].x = x;
2228 set_pkt_overhead(pkt_dev);
2229 pkt_dev->pkt_overhead += x->props.header_len;
2230 }
2231
2232 }
2233 }
2234 #endif
2235 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2236 {
2237
2238 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2239 pkt_dev->cur_queue_map = smp_processor_id();
2240
2241 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2242 __u16 t;
2243 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2244 t = random32() %
2245 (pkt_dev->queue_map_max -
2246 pkt_dev->queue_map_min + 1)
2247 + pkt_dev->queue_map_min;
2248 } else {
2249 t = pkt_dev->cur_queue_map + 1;
2250 if (t > pkt_dev->queue_map_max)
2251 t = pkt_dev->queue_map_min;
2252 }
2253 pkt_dev->cur_queue_map = t;
2254 }
2255 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2256 }
2257
2258 /* Increment/randomize headers according to flags and current values
2259 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2260 */
2261 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2262 {
2263 __u32 imn;
2264 __u32 imx;
2265 int flow = 0;
2266
2267 if (pkt_dev->cflows)
2268 flow = f_pick(pkt_dev);
2269
2270 /* Deal with source MAC */
2271 if (pkt_dev->src_mac_count > 1) {
2272 __u32 mc;
2273 __u32 tmp;
2274
2275 if (pkt_dev->flags & F_MACSRC_RND)
2276 mc = random32() % pkt_dev->src_mac_count;
2277 else {
2278 mc = pkt_dev->cur_src_mac_offset++;
2279 if (pkt_dev->cur_src_mac_offset >=
2280 pkt_dev->src_mac_count)
2281 pkt_dev->cur_src_mac_offset = 0;
2282 }
2283
2284 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2285 pkt_dev->hh[11] = tmp;
2286 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2287 pkt_dev->hh[10] = tmp;
2288 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2289 pkt_dev->hh[9] = tmp;
2290 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2291 pkt_dev->hh[8] = tmp;
2292 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2293 pkt_dev->hh[7] = tmp;
2294 }
2295
2296 /* Deal with Destination MAC */
2297 if (pkt_dev->dst_mac_count > 1) {
2298 __u32 mc;
2299 __u32 tmp;
2300
2301 if (pkt_dev->flags & F_MACDST_RND)
2302 mc = random32() % pkt_dev->dst_mac_count;
2303
2304 else {
2305 mc = pkt_dev->cur_dst_mac_offset++;
2306 if (pkt_dev->cur_dst_mac_offset >=
2307 pkt_dev->dst_mac_count) {
2308 pkt_dev->cur_dst_mac_offset = 0;
2309 }
2310 }
2311
2312 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2313 pkt_dev->hh[5] = tmp;
2314 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2315 pkt_dev->hh[4] = tmp;
2316 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2317 pkt_dev->hh[3] = tmp;
2318 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2319 pkt_dev->hh[2] = tmp;
2320 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2321 pkt_dev->hh[1] = tmp;
2322 }
2323
2324 if (pkt_dev->flags & F_MPLS_RND) {
2325 unsigned i;
2326 for (i = 0; i < pkt_dev->nr_labels; i++)
2327 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2328 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2329 ((__force __be32)random32() &
2330 htonl(0x000fffff));
2331 }
2332
2333 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2334 pkt_dev->vlan_id = random32() & (4096-1);
2335 }
2336
2337 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2338 pkt_dev->svlan_id = random32() & (4096 - 1);
2339 }
2340
2341 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2342 if (pkt_dev->flags & F_UDPSRC_RND)
2343 pkt_dev->cur_udp_src = random32() %
2344 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2345 + pkt_dev->udp_src_min;
2346
2347 else {
2348 pkt_dev->cur_udp_src++;
2349 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2350 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2351 }
2352 }
2353
2354 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2355 if (pkt_dev->flags & F_UDPDST_RND) {
2356 pkt_dev->cur_udp_dst = random32() %
2357 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2358 + pkt_dev->udp_dst_min;
2359 } else {
2360 pkt_dev->cur_udp_dst++;
2361 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2362 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2363 }
2364 }
2365
2366 if (!(pkt_dev->flags & F_IPV6)) {
2367
2368 imn = ntohl(pkt_dev->saddr_min);
2369 imx = ntohl(pkt_dev->saddr_max);
2370 if (imn < imx) {
2371 __u32 t;
2372 if (pkt_dev->flags & F_IPSRC_RND)
2373 t = random32() % (imx - imn) + imn;
2374 else {
2375 t = ntohl(pkt_dev->cur_saddr);
2376 t++;
2377 if (t > imx)
2378 t = imn;
2379
2380 }
2381 pkt_dev->cur_saddr = htonl(t);
2382 }
2383
2384 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2385 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2386 } else {
2387 imn = ntohl(pkt_dev->daddr_min);
2388 imx = ntohl(pkt_dev->daddr_max);
2389 if (imn < imx) {
2390 __u32 t;
2391 __be32 s;
2392 if (pkt_dev->flags & F_IPDST_RND) {
2393
2394 t = random32() % (imx - imn) + imn;
2395 s = htonl(t);
2396
2397 while (ipv4_is_loopback(s) ||
2398 ipv4_is_multicast(s) ||
2399 ipv4_is_lbcast(s) ||
2400 ipv4_is_zeronet(s) ||
2401 ipv4_is_local_multicast(s)) {
2402 t = random32() % (imx - imn) + imn;
2403 s = htonl(t);
2404 }
2405 pkt_dev->cur_daddr = s;
2406 } else {
2407 t = ntohl(pkt_dev->cur_daddr);
2408 t++;
2409 if (t > imx) {
2410 t = imn;
2411 }
2412 pkt_dev->cur_daddr = htonl(t);
2413 }
2414 }
2415 if (pkt_dev->cflows) {
2416 pkt_dev->flows[flow].flags |= F_INIT;
2417 pkt_dev->flows[flow].cur_daddr =
2418 pkt_dev->cur_daddr;
2419 #ifdef CONFIG_XFRM
2420 if (pkt_dev->flags & F_IPSEC_ON)
2421 get_ipsec_sa(pkt_dev, flow);
2422 #endif
2423 pkt_dev->nflows++;
2424 }
2425 }
2426 } else { /* IPV6 * */
2427
2428 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2429 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2430 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2431 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2432 else {
2433 int i;
2434
2435 /* Only random destinations yet */
2436
2437 for (i = 0; i < 4; i++) {
2438 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2439 (((__force __be32)random32() |
2440 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2441 pkt_dev->max_in6_daddr.s6_addr32[i]);
2442 }
2443 }
2444 }
2445
2446 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2447 __u32 t;
2448 if (pkt_dev->flags & F_TXSIZE_RND) {
2449 t = random32() %
2450 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2451 + pkt_dev->min_pkt_size;
2452 } else {
2453 t = pkt_dev->cur_pkt_size + 1;
2454 if (t > pkt_dev->max_pkt_size)
2455 t = pkt_dev->min_pkt_size;
2456 }
2457 pkt_dev->cur_pkt_size = t;
2458 }
2459
2460 set_cur_queue_map(pkt_dev);
2461
2462 pkt_dev->flows[flow].count++;
2463 }
2464
2465
2466 #ifdef CONFIG_XFRM
2467 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2468 {
2469 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2470 int err = 0;
2471
2472 if (!x)
2473 return 0;
2474 /* XXX: we dont support tunnel mode for now until
2475 * we resolve the dst issue */
2476 if (x->props.mode != XFRM_MODE_TRANSPORT)
2477 return 0;
2478
2479 spin_lock(&x->lock);
2480
2481 err = x->outer_mode->output(x, skb);
2482 if (err)
2483 goto error;
2484 err = x->type->output(x, skb);
2485 if (err)
2486 goto error;
2487
2488 x->curlft.bytes += skb->len;
2489 x->curlft.packets++;
2490 error:
2491 spin_unlock(&x->lock);
2492 return err;
2493 }
2494
2495 static void free_SAs(struct pktgen_dev *pkt_dev)
2496 {
2497 if (pkt_dev->cflows) {
2498 /* let go of the SAs if we have them */
2499 int i;
2500 for (i = 0; i < pkt_dev->cflows; i++) {
2501 struct xfrm_state *x = pkt_dev->flows[i].x;
2502 if (x) {
2503 xfrm_state_put(x);
2504 pkt_dev->flows[i].x = NULL;
2505 }
2506 }
2507 }
2508 }
2509
2510 static int process_ipsec(struct pktgen_dev *pkt_dev,
2511 struct sk_buff *skb, __be16 protocol)
2512 {
2513 if (pkt_dev->flags & F_IPSEC_ON) {
2514 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2515 int nhead = 0;
2516 if (x) {
2517 int ret;
2518 __u8 *eth;
2519 nhead = x->props.header_len - skb_headroom(skb);
2520 if (nhead > 0) {
2521 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2522 if (ret < 0) {
2523 pr_err("Error expanding ipsec packet %d\n",
2524 ret);
2525 goto err;
2526 }
2527 }
2528
2529 /* ipsec is not expecting ll header */
2530 skb_pull(skb, ETH_HLEN);
2531 ret = pktgen_output_ipsec(skb, pkt_dev);
2532 if (ret) {
2533 pr_err("Error creating ipsec packet %d\n", ret);
2534 goto err;
2535 }
2536 /* restore ll */
2537 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2538 memcpy(eth, pkt_dev->hh, 12);
2539 *(u16 *) &eth[12] = protocol;
2540 }
2541 }
2542 return 1;
2543 err:
2544 kfree_skb(skb);
2545 return 0;
2546 }
2547 #endif
2548
2549 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2550 {
2551 unsigned i;
2552 for (i = 0; i < pkt_dev->nr_labels; i++)
2553 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2554
2555 mpls--;
2556 *mpls |= MPLS_STACK_BOTTOM;
2557 }
2558
2559 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2560 unsigned int prio)
2561 {
2562 return htons(id | (cfi << 12) | (prio << 13));
2563 }
2564
2565 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2566 int datalen)
2567 {
2568 struct timeval timestamp;
2569 struct pktgen_hdr *pgh;
2570
2571 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
2572 datalen -= sizeof(*pgh);
2573
2574 if (pkt_dev->nfrags <= 0) {
2575 memset(skb_put(skb, datalen), 0, datalen);
2576 } else {
2577 int frags = pkt_dev->nfrags;
2578 int i, len;
2579 int frag_len;
2580
2581
2582 if (frags > MAX_SKB_FRAGS)
2583 frags = MAX_SKB_FRAGS;
2584 len = datalen - frags * PAGE_SIZE;
2585 if (len > 0) {
2586 memset(skb_put(skb, len), 0, len);
2587 datalen = frags * PAGE_SIZE;
2588 }
2589
2590 i = 0;
2591 frag_len = (datalen/frags) < PAGE_SIZE ?
2592 (datalen/frags) : PAGE_SIZE;
2593 while (datalen > 0) {
2594 if (unlikely(!pkt_dev->page)) {
2595 int node = numa_node_id();
2596
2597 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2598 node = pkt_dev->node;
2599 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2600 if (!pkt_dev->page)
2601 break;
2602 }
2603 skb_shinfo(skb)->frags[i].page = pkt_dev->page;
2604 get_page(pkt_dev->page);
2605 skb_shinfo(skb)->frags[i].page_offset = 0;
2606 /*last fragment, fill rest of data*/
2607 if (i == (frags - 1))
2608 skb_shinfo(skb)->frags[i].size =
2609 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2610 else
2611 skb_shinfo(skb)->frags[i].size = frag_len;
2612 datalen -= skb_shinfo(skb)->frags[i].size;
2613 skb->len += skb_shinfo(skb)->frags[i].size;
2614 skb->data_len += skb_shinfo(skb)->frags[i].size;
2615 i++;
2616 skb_shinfo(skb)->nr_frags = i;
2617 }
2618 }
2619
2620 /* Stamp the time, and sequence number,
2621 * convert them to network byte order
2622 */
2623 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2624 pgh->seq_num = htonl(pkt_dev->seq_num);
2625
2626 do_gettimeofday(&timestamp);
2627 pgh->tv_sec = htonl(timestamp.tv_sec);
2628 pgh->tv_usec = htonl(timestamp.tv_usec);
2629 }
2630
2631 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2632 struct pktgen_dev *pkt_dev)
2633 {
2634 struct sk_buff *skb = NULL;
2635 __u8 *eth;
2636 struct udphdr *udph;
2637 int datalen, iplen;
2638 struct iphdr *iph;
2639 __be16 protocol = htons(ETH_P_IP);
2640 __be32 *mpls;
2641 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2642 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2643 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2644 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2645 u16 queue_map;
2646
2647 if (pkt_dev->nr_labels)
2648 protocol = htons(ETH_P_MPLS_UC);
2649
2650 if (pkt_dev->vlan_id != 0xffff)
2651 protocol = htons(ETH_P_8021Q);
2652
2653 /* Update any of the values, used when we're incrementing various
2654 * fields.
2655 */
2656 mod_cur_headers(pkt_dev);
2657 queue_map = pkt_dev->cur_queue_map;
2658
2659 datalen = (odev->hard_header_len + 16) & ~0xf;
2660
2661 if (pkt_dev->flags & F_NODE) {
2662 int node;
2663
2664 if (pkt_dev->node >= 0)
2665 node = pkt_dev->node;
2666 else
2667 node = numa_node_id();
2668
2669 skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64
2670 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node);
2671 if (likely(skb)) {
2672 skb_reserve(skb, NET_SKB_PAD);
2673 skb->dev = odev;
2674 }
2675 }
2676 else
2677 skb = __netdev_alloc_skb(odev,
2678 pkt_dev->cur_pkt_size + 64
2679 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2680
2681 if (!skb) {
2682 sprintf(pkt_dev->result, "No memory");
2683 return NULL;
2684 }
2685 prefetchw(skb->data);
2686
2687 skb_reserve(skb, datalen);
2688
2689 /* Reserve for ethernet and IP header */
2690 eth = (__u8 *) skb_push(skb, 14);
2691 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2692 if (pkt_dev->nr_labels)
2693 mpls_push(mpls, pkt_dev);
2694
2695 if (pkt_dev->vlan_id != 0xffff) {
2696 if (pkt_dev->svlan_id != 0xffff) {
2697 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2698 *svlan_tci = build_tci(pkt_dev->svlan_id,
2699 pkt_dev->svlan_cfi,
2700 pkt_dev->svlan_p);
2701 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2702 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2703 }
2704 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2705 *vlan_tci = build_tci(pkt_dev->vlan_id,
2706 pkt_dev->vlan_cfi,
2707 pkt_dev->vlan_p);
2708 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2709 *vlan_encapsulated_proto = htons(ETH_P_IP);
2710 }
2711
2712 skb->network_header = skb->tail;
2713 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2714 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2715 skb_set_queue_mapping(skb, queue_map);
2716 skb->priority = pkt_dev->skb_priority;
2717
2718 iph = ip_hdr(skb);
2719 udph = udp_hdr(skb);
2720
2721 memcpy(eth, pkt_dev->hh, 12);
2722 *(__be16 *) & eth[12] = protocol;
2723
2724 /* Eth + IPh + UDPh + mpls */
2725 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2726 pkt_dev->pkt_overhead;
2727 if (datalen < sizeof(struct pktgen_hdr))
2728 datalen = sizeof(struct pktgen_hdr);
2729
2730 udph->source = htons(pkt_dev->cur_udp_src);
2731 udph->dest = htons(pkt_dev->cur_udp_dst);
2732 udph->len = htons(datalen + 8); /* DATA + udphdr */
2733 udph->check = 0; /* No checksum */
2734
2735 iph->ihl = 5;
2736 iph->version = 4;
2737 iph->ttl = 32;
2738 iph->tos = pkt_dev->tos;
2739 iph->protocol = IPPROTO_UDP; /* UDP */
2740 iph->saddr = pkt_dev->cur_saddr;
2741 iph->daddr = pkt_dev->cur_daddr;
2742 iph->id = htons(pkt_dev->ip_id);
2743 pkt_dev->ip_id++;
2744 iph->frag_off = 0;
2745 iplen = 20 + 8 + datalen;
2746 iph->tot_len = htons(iplen);
2747 iph->check = 0;
2748 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2749 skb->protocol = protocol;
2750 skb->mac_header = (skb->network_header - ETH_HLEN -
2751 pkt_dev->pkt_overhead);
2752 skb->dev = odev;
2753 skb->pkt_type = PACKET_HOST;
2754 pktgen_finalize_skb(pkt_dev, skb, datalen);
2755
2756 #ifdef CONFIG_XFRM
2757 if (!process_ipsec(pkt_dev, skb, protocol))
2758 return NULL;
2759 #endif
2760
2761 return skb;
2762 }
2763
2764 /*
2765 * scan_ip6, fmt_ip taken from dietlibc-0.21
2766 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2767 *
2768 * Slightly modified for kernel.
2769 * Should be candidate for net/ipv4/utils.c
2770 * --ro
2771 */
2772
2773 static unsigned int scan_ip6(const char *s, char ip[16])
2774 {
2775 unsigned int i;
2776 unsigned int len = 0;
2777 unsigned long u;
2778 char suffix[16];
2779 unsigned int prefixlen = 0;
2780 unsigned int suffixlen = 0;
2781 __be32 tmp;
2782 char *pos;
2783
2784 for (i = 0; i < 16; i++)
2785 ip[i] = 0;
2786
2787 for (;;) {
2788 if (*s == ':') {
2789 len++;
2790 if (s[1] == ':') { /* Found "::", skip to part 2 */
2791 s += 2;
2792 len++;
2793 break;
2794 }
2795 s++;
2796 }
2797
2798 u = simple_strtoul(s, &pos, 16);
2799 i = pos - s;
2800 if (!i)
2801 return 0;
2802 if (prefixlen == 12 && s[i] == '.') {
2803
2804 /* the last 4 bytes may be written as IPv4 address */
2805
2806 tmp = in_aton(s);
2807 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2808 return i + len;
2809 }
2810 ip[prefixlen++] = (u >> 8);
2811 ip[prefixlen++] = (u & 255);
2812 s += i;
2813 len += i;
2814 if (prefixlen == 16)
2815 return len;
2816 }
2817
2818 /* part 2, after "::" */
2819 for (;;) {
2820 if (*s == ':') {
2821 if (suffixlen == 0)
2822 break;
2823 s++;
2824 len++;
2825 } else if (suffixlen != 0)
2826 break;
2827
2828 u = simple_strtol(s, &pos, 16);
2829 i = pos - s;
2830 if (!i) {
2831 if (*s)
2832 len--;
2833 break;
2834 }
2835 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2836 tmp = in_aton(s);
2837 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2838 sizeof(tmp));
2839 suffixlen += 4;
2840 len += strlen(s);
2841 break;
2842 }
2843 suffix[suffixlen++] = (u >> 8);
2844 suffix[suffixlen++] = (u & 255);
2845 s += i;
2846 len += i;
2847 if (prefixlen + suffixlen == 16)
2848 break;
2849 }
2850 for (i = 0; i < suffixlen; i++)
2851 ip[16 - suffixlen + i] = suffix[i];
2852 return len;
2853 }
2854
2855 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2856 struct pktgen_dev *pkt_dev)
2857 {
2858 struct sk_buff *skb = NULL;
2859 __u8 *eth;
2860 struct udphdr *udph;
2861 int datalen;
2862 struct ipv6hdr *iph;
2863 __be16 protocol = htons(ETH_P_IPV6);
2864 __be32 *mpls;
2865 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2866 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2867 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2868 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2869 u16 queue_map;
2870
2871 if (pkt_dev->nr_labels)
2872 protocol = htons(ETH_P_MPLS_UC);
2873
2874 if (pkt_dev->vlan_id != 0xffff)
2875 protocol = htons(ETH_P_8021Q);
2876
2877 /* Update any of the values, used when we're incrementing various
2878 * fields.
2879 */
2880 mod_cur_headers(pkt_dev);
2881 queue_map = pkt_dev->cur_queue_map;
2882
2883 skb = __netdev_alloc_skb(odev,
2884 pkt_dev->cur_pkt_size + 64
2885 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
2886 if (!skb) {
2887 sprintf(pkt_dev->result, "No memory");
2888 return NULL;
2889 }
2890 prefetchw(skb->data);
2891
2892 skb_reserve(skb, 16);
2893
2894 /* Reserve for ethernet and IP header */
2895 eth = (__u8 *) skb_push(skb, 14);
2896 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2897 if (pkt_dev->nr_labels)
2898 mpls_push(mpls, pkt_dev);
2899
2900 if (pkt_dev->vlan_id != 0xffff) {
2901 if (pkt_dev->svlan_id != 0xffff) {
2902 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2903 *svlan_tci = build_tci(pkt_dev->svlan_id,
2904 pkt_dev->svlan_cfi,
2905 pkt_dev->svlan_p);
2906 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2907 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2908 }
2909 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2910 *vlan_tci = build_tci(pkt_dev->vlan_id,
2911 pkt_dev->vlan_cfi,
2912 pkt_dev->vlan_p);
2913 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2914 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2915 }
2916
2917 skb->network_header = skb->tail;
2918 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2919 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2920 skb_set_queue_mapping(skb, queue_map);
2921 skb->priority = pkt_dev->skb_priority;
2922 iph = ipv6_hdr(skb);
2923 udph = udp_hdr(skb);
2924
2925 memcpy(eth, pkt_dev->hh, 12);
2926 *(__be16 *) &eth[12] = protocol;
2927
2928 /* Eth + IPh + UDPh + mpls */
2929 datalen = pkt_dev->cur_pkt_size - 14 -
2930 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2931 pkt_dev->pkt_overhead;
2932
2933 if (datalen < sizeof(struct pktgen_hdr)) {
2934 datalen = sizeof(struct pktgen_hdr);
2935 if (net_ratelimit())
2936 pr_info("increased datalen to %d\n", datalen);
2937 }
2938
2939 udph->source = htons(pkt_dev->cur_udp_src);
2940 udph->dest = htons(pkt_dev->cur_udp_dst);
2941 udph->len = htons(datalen + sizeof(struct udphdr));
2942 udph->check = 0; /* No checksum */
2943
2944 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2945
2946 if (pkt_dev->traffic_class) {
2947 /* Version + traffic class + flow (0) */
2948 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2949 }
2950
2951 iph->hop_limit = 32;
2952
2953 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2954 iph->nexthdr = IPPROTO_UDP;
2955
2956 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2957 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2958
2959 skb->mac_header = (skb->network_header - ETH_HLEN -
2960 pkt_dev->pkt_overhead);
2961 skb->protocol = protocol;
2962 skb->dev = odev;
2963 skb->pkt_type = PACKET_HOST;
2964
2965 pktgen_finalize_skb(pkt_dev, skb, datalen);
2966
2967 return skb;
2968 }
2969
2970 static struct sk_buff *fill_packet(struct net_device *odev,
2971 struct pktgen_dev *pkt_dev)
2972 {
2973 if (pkt_dev->flags & F_IPV6)
2974 return fill_packet_ipv6(odev, pkt_dev);
2975 else
2976 return fill_packet_ipv4(odev, pkt_dev);
2977 }
2978
2979 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2980 {
2981 pkt_dev->seq_num = 1;
2982 pkt_dev->idle_acc = 0;
2983 pkt_dev->sofar = 0;
2984 pkt_dev->tx_bytes = 0;
2985 pkt_dev->errors = 0;
2986 }
2987
2988 /* Set up structure for sending pkts, clear counters */
2989
2990 static void pktgen_run(struct pktgen_thread *t)
2991 {
2992 struct pktgen_dev *pkt_dev;
2993 int started = 0;
2994
2995 func_enter();
2996
2997 if_lock(t);
2998 list_for_each_entry(pkt_dev, &t->if_list, list) {
2999
3000 /*
3001 * setup odev and create initial packet.
3002 */
3003 pktgen_setup_inject(pkt_dev);
3004
3005 if (pkt_dev->odev) {
3006 pktgen_clear_counters(pkt_dev);
3007 pkt_dev->running = 1; /* Cranke yeself! */
3008 pkt_dev->skb = NULL;
3009 pkt_dev->started_at =
3010 pkt_dev->next_tx = ktime_now();
3011
3012 set_pkt_overhead(pkt_dev);
3013
3014 strcpy(pkt_dev->result, "Starting");
3015 started++;
3016 } else
3017 strcpy(pkt_dev->result, "Error starting");
3018 }
3019 if_unlock(t);
3020 if (started)
3021 t->control &= ~(T_STOP);
3022 }
3023
3024 static void pktgen_stop_all_threads_ifs(void)
3025 {
3026 struct pktgen_thread *t;
3027
3028 func_enter();
3029
3030 mutex_lock(&pktgen_thread_lock);
3031
3032 list_for_each_entry(t, &pktgen_threads, th_list)
3033 t->control |= T_STOP;
3034
3035 mutex_unlock(&pktgen_thread_lock);
3036 }
3037
3038 static int thread_is_running(const struct pktgen_thread *t)
3039 {
3040 const struct pktgen_dev *pkt_dev;
3041
3042 list_for_each_entry(pkt_dev, &t->if_list, list)
3043 if (pkt_dev->running)
3044 return 1;
3045 return 0;
3046 }
3047
3048 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3049 {
3050 if_lock(t);
3051
3052 while (thread_is_running(t)) {
3053
3054 if_unlock(t);
3055
3056 msleep_interruptible(100);
3057
3058 if (signal_pending(current))
3059 goto signal;
3060 if_lock(t);
3061 }
3062 if_unlock(t);
3063 return 1;
3064 signal:
3065 return 0;
3066 }
3067
3068 static int pktgen_wait_all_threads_run(void)
3069 {
3070 struct pktgen_thread *t;
3071 int sig = 1;
3072
3073 mutex_lock(&pktgen_thread_lock);
3074
3075 list_for_each_entry(t, &pktgen_threads, th_list) {
3076 sig = pktgen_wait_thread_run(t);
3077 if (sig == 0)
3078 break;
3079 }
3080
3081 if (sig == 0)
3082 list_for_each_entry(t, &pktgen_threads, th_list)
3083 t->control |= (T_STOP);
3084
3085 mutex_unlock(&pktgen_thread_lock);
3086 return sig;
3087 }
3088
3089 static void pktgen_run_all_threads(void)
3090 {
3091 struct pktgen_thread *t;
3092
3093 func_enter();
3094
3095 mutex_lock(&pktgen_thread_lock);
3096
3097 list_for_each_entry(t, &pktgen_threads, th_list)
3098 t->control |= (T_RUN);
3099
3100 mutex_unlock(&pktgen_thread_lock);
3101
3102 /* Propagate thread->control */
3103 schedule_timeout_interruptible(msecs_to_jiffies(125));
3104
3105 pktgen_wait_all_threads_run();
3106 }
3107
3108 static void pktgen_reset_all_threads(void)
3109 {
3110 struct pktgen_thread *t;
3111
3112 func_enter();
3113
3114 mutex_lock(&pktgen_thread_lock);
3115
3116 list_for_each_entry(t, &pktgen_threads, th_list)
3117 t->control |= (T_REMDEVALL);
3118
3119 mutex_unlock(&pktgen_thread_lock);
3120
3121 /* Propagate thread->control */
3122 schedule_timeout_interruptible(msecs_to_jiffies(125));
3123
3124 pktgen_wait_all_threads_run();
3125 }
3126
3127 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3128 {
3129 __u64 bps, mbps, pps;
3130 char *p = pkt_dev->result;
3131 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3132 pkt_dev->started_at);
3133 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3134
3135 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3136 (unsigned long long)ktime_to_us(elapsed),
3137 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3138 (unsigned long long)ktime_to_us(idle),
3139 (unsigned long long)pkt_dev->sofar,
3140 pkt_dev->cur_pkt_size, nr_frags);
3141
3142 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3143 ktime_to_ns(elapsed));
3144
3145 bps = pps * 8 * pkt_dev->cur_pkt_size;
3146
3147 mbps = bps;
3148 do_div(mbps, 1000000);
3149 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3150 (unsigned long long)pps,
3151 (unsigned long long)mbps,
3152 (unsigned long long)bps,
3153 (unsigned long long)pkt_dev->errors);
3154 }
3155
3156 /* Set stopped-at timer, remove from running list, do counters & statistics */
3157 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3158 {
3159 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3160
3161 if (!pkt_dev->running) {
3162 pr_warning("interface: %s is already stopped\n",
3163 pkt_dev->odevname);
3164 return -EINVAL;
3165 }
3166
3167 kfree_skb(pkt_dev->skb);
3168 pkt_dev->skb = NULL;
3169 pkt_dev->stopped_at = ktime_now();
3170 pkt_dev->running = 0;
3171
3172 show_results(pkt_dev, nr_frags);
3173
3174 return 0;
3175 }
3176
3177 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3178 {
3179 struct pktgen_dev *pkt_dev, *best = NULL;
3180
3181 if_lock(t);
3182
3183 list_for_each_entry(pkt_dev, &t->if_list, list) {
3184 if (!pkt_dev->running)
3185 continue;
3186 if (best == NULL)
3187 best = pkt_dev;
3188 else if (ktime_lt(pkt_dev->next_tx, best->next_tx))
3189 best = pkt_dev;
3190 }
3191 if_unlock(t);
3192 return best;
3193 }
3194
3195 static void pktgen_stop(struct pktgen_thread *t)
3196 {
3197 struct pktgen_dev *pkt_dev;
3198
3199 func_enter();
3200
3201 if_lock(t);
3202
3203 list_for_each_entry(pkt_dev, &t->if_list, list) {
3204 pktgen_stop_device(pkt_dev);
3205 }
3206
3207 if_unlock(t);
3208 }
3209
3210 /*
3211 * one of our devices needs to be removed - find it
3212 * and remove it
3213 */
3214 static void pktgen_rem_one_if(struct pktgen_thread *t)
3215 {
3216 struct list_head *q, *n;
3217 struct pktgen_dev *cur;
3218
3219 func_enter();
3220
3221 if_lock(t);
3222
3223 list_for_each_safe(q, n, &t->if_list) {
3224 cur = list_entry(q, struct pktgen_dev, list);
3225
3226 if (!cur->removal_mark)
3227 continue;
3228
3229 kfree_skb(cur->skb);
3230 cur->skb = NULL;
3231
3232 pktgen_remove_device(t, cur);
3233
3234 break;
3235 }
3236
3237 if_unlock(t);
3238 }
3239
3240 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3241 {
3242 struct list_head *q, *n;
3243 struct pktgen_dev *cur;
3244
3245 func_enter();
3246
3247 /* Remove all devices, free mem */
3248
3249 if_lock(t);
3250
3251 list_for_each_safe(q, n, &t->if_list) {
3252 cur = list_entry(q, struct pktgen_dev, list);
3253
3254 kfree_skb(cur->skb);
3255 cur->skb = NULL;
3256
3257 pktgen_remove_device(t, cur);
3258 }
3259
3260 if_unlock(t);
3261 }
3262
3263 static void pktgen_rem_thread(struct pktgen_thread *t)
3264 {
3265 /* Remove from the thread list */
3266
3267 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3268
3269 }
3270
3271 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3272 {
3273 ktime_t idle_start = ktime_now();
3274 schedule();
3275 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3276 }
3277
3278 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3279 {
3280 ktime_t idle_start = ktime_now();
3281
3282 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3283 if (signal_pending(current))
3284 break;
3285
3286 if (need_resched())
3287 pktgen_resched(pkt_dev);
3288 else
3289 cpu_relax();
3290 }
3291 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3292 }
3293
3294 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3295 {
3296 struct net_device *odev = pkt_dev->odev;
3297 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3298 = odev->netdev_ops->ndo_start_xmit;
3299 struct netdev_queue *txq;
3300 u16 queue_map;
3301 int ret;
3302
3303 /* If device is offline, then don't send */
3304 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3305 pktgen_stop_device(pkt_dev);
3306 return;
3307 }
3308
3309 /* This is max DELAY, this has special meaning of
3310 * "never transmit"
3311 */
3312 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3313 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX);
3314 return;
3315 }
3316
3317 /* If no skb or clone count exhausted then get new one */
3318 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3319 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3320 /* build a new pkt */
3321 kfree_skb(pkt_dev->skb);
3322
3323 pkt_dev->skb = fill_packet(odev, pkt_dev);
3324 if (pkt_dev->skb == NULL) {
3325 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3326 schedule();
3327 pkt_dev->clone_count--; /* back out increment, OOM */
3328 return;
3329 }
3330 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3331 pkt_dev->allocated_skbs++;
3332 pkt_dev->clone_count = 0; /* reset counter */
3333 }
3334
3335 if (pkt_dev->delay && pkt_dev->last_ok)
3336 spin(pkt_dev, pkt_dev->next_tx);
3337
3338 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3339 txq = netdev_get_tx_queue(odev, queue_map);
3340
3341 __netif_tx_lock_bh(txq);
3342
3343 if (unlikely(netif_tx_queue_frozen_or_stopped(txq))) {
3344 ret = NETDEV_TX_BUSY;
3345 pkt_dev->last_ok = 0;
3346 goto unlock;
3347 }
3348 atomic_inc(&(pkt_dev->skb->users));
3349 ret = (*xmit)(pkt_dev->skb, odev);
3350
3351 switch (ret) {
3352 case NETDEV_TX_OK:
3353 txq_trans_update(txq);
3354 pkt_dev->last_ok = 1;
3355 pkt_dev->sofar++;
3356 pkt_dev->seq_num++;
3357 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3358 break;
3359 case NET_XMIT_DROP:
3360 case NET_XMIT_CN:
3361 case NET_XMIT_POLICED:
3362 /* skb has been consumed */
3363 pkt_dev->errors++;
3364 break;
3365 default: /* Drivers are not supposed to return other values! */
3366 if (net_ratelimit())
3367 pr_info("%s xmit error: %d\n", pkt_dev->odevname, ret);
3368 pkt_dev->errors++;
3369 /* fallthru */
3370 case NETDEV_TX_LOCKED:
3371 case NETDEV_TX_BUSY:
3372 /* Retry it next time */
3373 atomic_dec(&(pkt_dev->skb->users));
3374 pkt_dev->last_ok = 0;
3375 }
3376 unlock:
3377 __netif_tx_unlock_bh(txq);
3378
3379 /* If pkt_dev->count is zero, then run forever */
3380 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3381 pktgen_wait_for_skb(pkt_dev);
3382
3383 /* Done with this */
3384 pktgen_stop_device(pkt_dev);
3385 }
3386 }
3387
3388 /*
3389 * Main loop of the thread goes here
3390 */
3391
3392 static int pktgen_thread_worker(void *arg)
3393 {
3394 DEFINE_WAIT(wait);
3395 struct pktgen_thread *t = arg;
3396 struct pktgen_dev *pkt_dev = NULL;
3397 int cpu = t->cpu;
3398
3399 BUG_ON(smp_processor_id() != cpu);
3400
3401 init_waitqueue_head(&t->queue);
3402 complete(&t->start_done);
3403
3404 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3405
3406 set_current_state(TASK_INTERRUPTIBLE);
3407
3408 set_freezable();
3409
3410 while (!kthread_should_stop()) {
3411 pkt_dev = next_to_run(t);
3412
3413 if (unlikely(!pkt_dev && t->control == 0)) {
3414 if (pktgen_exiting)
3415 break;
3416 wait_event_interruptible_timeout(t->queue,
3417 t->control != 0,
3418 HZ/10);
3419 try_to_freeze();
3420 continue;
3421 }
3422
3423 __set_current_state(TASK_RUNNING);
3424
3425 if (likely(pkt_dev)) {
3426 pktgen_xmit(pkt_dev);
3427
3428 if (need_resched())
3429 pktgen_resched(pkt_dev);
3430 else
3431 cpu_relax();
3432 }
3433
3434 if (t->control & T_STOP) {
3435 pktgen_stop(t);
3436 t->control &= ~(T_STOP);
3437 }
3438
3439 if (t->control & T_RUN) {
3440 pktgen_run(t);
3441 t->control &= ~(T_RUN);
3442 }
3443
3444 if (t->control & T_REMDEVALL) {
3445 pktgen_rem_all_ifs(t);
3446 t->control &= ~(T_REMDEVALL);
3447 }
3448
3449 if (t->control & T_REMDEV) {
3450 pktgen_rem_one_if(t);
3451 t->control &= ~(T_REMDEV);
3452 }
3453
3454 try_to_freeze();
3455
3456 set_current_state(TASK_INTERRUPTIBLE);
3457 }
3458
3459 pr_debug("%s stopping all device\n", t->tsk->comm);
3460 pktgen_stop(t);
3461
3462 pr_debug("%s removing all device\n", t->tsk->comm);
3463 pktgen_rem_all_ifs(t);
3464
3465 pr_debug("%s removing thread\n", t->tsk->comm);
3466 pktgen_rem_thread(t);
3467
3468 /* Wait for kthread_stop */
3469 while (!kthread_should_stop()) {
3470 set_current_state(TASK_INTERRUPTIBLE);
3471 schedule();
3472 }
3473 __set_current_state(TASK_RUNNING);
3474
3475 return 0;
3476 }
3477
3478 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3479 const char *ifname, bool exact)
3480 {
3481 struct pktgen_dev *p, *pkt_dev = NULL;
3482 size_t len = strlen(ifname);
3483
3484 if_lock(t);
3485 list_for_each_entry(p, &t->if_list, list)
3486 if (strncmp(p->odevname, ifname, len) == 0) {
3487 if (p->odevname[len]) {
3488 if (exact || p->odevname[len] != '@')
3489 continue;
3490 }
3491 pkt_dev = p;
3492 break;
3493 }
3494
3495 if_unlock(t);
3496 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3497 return pkt_dev;
3498 }
3499
3500 /*
3501 * Adds a dev at front of if_list.
3502 */
3503
3504 static int add_dev_to_thread(struct pktgen_thread *t,
3505 struct pktgen_dev *pkt_dev)
3506 {
3507 int rv = 0;
3508
3509 if_lock(t);
3510
3511 if (pkt_dev->pg_thread) {
3512 pr_err("ERROR: already assigned to a thread\n");
3513 rv = -EBUSY;
3514 goto out;
3515 }
3516
3517 list_add(&pkt_dev->list, &t->if_list);
3518 pkt_dev->pg_thread = t;
3519 pkt_dev->running = 0;
3520
3521 out:
3522 if_unlock(t);
3523 return rv;
3524 }
3525
3526 /* Called under thread lock */
3527
3528 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3529 {
3530 struct pktgen_dev *pkt_dev;
3531 int err;
3532 int node = cpu_to_node(t->cpu);
3533
3534 /* We don't allow a device to be on several threads */
3535
3536 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3537 if (pkt_dev) {
3538 pr_err("ERROR: interface already used\n");
3539 return -EBUSY;
3540 }
3541
3542 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3543 if (!pkt_dev)
3544 return -ENOMEM;
3545
3546 strcpy(pkt_dev->odevname, ifname);
3547 pkt_dev->flows = vmalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3548 node);
3549 if (pkt_dev->flows == NULL) {
3550 kfree(pkt_dev);
3551 return -ENOMEM;
3552 }
3553 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3554
3555 pkt_dev->removal_mark = 0;
3556 pkt_dev->min_pkt_size = ETH_ZLEN;
3557 pkt_dev->max_pkt_size = ETH_ZLEN;
3558 pkt_dev->nfrags = 0;
3559 pkt_dev->clone_skb = pg_clone_skb_d;
3560 pkt_dev->delay = pg_delay_d;
3561 pkt_dev->count = pg_count_d;
3562 pkt_dev->sofar = 0;
3563 pkt_dev->udp_src_min = 9; /* sink port */
3564 pkt_dev->udp_src_max = 9;
3565 pkt_dev->udp_dst_min = 9;
3566 pkt_dev->udp_dst_max = 9;
3567
3568 pkt_dev->vlan_p = 0;
3569 pkt_dev->vlan_cfi = 0;
3570 pkt_dev->vlan_id = 0xffff;
3571 pkt_dev->svlan_p = 0;
3572 pkt_dev->svlan_cfi = 0;
3573 pkt_dev->svlan_id = 0xffff;
3574 pkt_dev->node = -1;
3575
3576 err = pktgen_setup_dev(pkt_dev, ifname);
3577 if (err)
3578 goto out1;
3579
3580 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3581 &pktgen_if_fops, pkt_dev);
3582 if (!pkt_dev->entry) {
3583 pr_err("cannot create %s/%s procfs entry\n",
3584 PG_PROC_DIR, ifname);
3585 err = -EINVAL;
3586 goto out2;
3587 }
3588 #ifdef CONFIG_XFRM
3589 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3590 pkt_dev->ipsproto = IPPROTO_ESP;
3591 #endif
3592
3593 return add_dev_to_thread(t, pkt_dev);
3594 out2:
3595 dev_put(pkt_dev->odev);
3596 out1:
3597 #ifdef CONFIG_XFRM
3598 free_SAs(pkt_dev);
3599 #endif
3600 vfree(pkt_dev->flows);
3601 kfree(pkt_dev);
3602 return err;
3603 }
3604
3605 static int __init pktgen_create_thread(int cpu)
3606 {
3607 struct pktgen_thread *t;
3608 struct proc_dir_entry *pe;
3609 struct task_struct *p;
3610
3611 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3612 cpu_to_node(cpu));
3613 if (!t) {
3614 pr_err("ERROR: out of memory, can't create new thread\n");
3615 return -ENOMEM;
3616 }
3617
3618 spin_lock_init(&t->if_lock);
3619 t->cpu = cpu;
3620
3621 INIT_LIST_HEAD(&t->if_list);
3622
3623 list_add_tail(&t->th_list, &pktgen_threads);
3624 init_completion(&t->start_done);
3625
3626 p = kthread_create_on_node(pktgen_thread_worker,
3627 t,
3628 cpu_to_node(cpu),
3629 "kpktgend_%d", cpu);
3630 if (IS_ERR(p)) {
3631 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3632 list_del(&t->th_list);
3633 kfree(t);
3634 return PTR_ERR(p);
3635 }
3636 kthread_bind(p, cpu);
3637 t->tsk = p;
3638
3639 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3640 &pktgen_thread_fops, t);
3641 if (!pe) {
3642 pr_err("cannot create %s/%s procfs entry\n",
3643 PG_PROC_DIR, t->tsk->comm);
3644 kthread_stop(p);
3645 list_del(&t->th_list);
3646 kfree(t);
3647 return -EINVAL;
3648 }
3649
3650 wake_up_process(p);
3651 wait_for_completion(&t->start_done);
3652
3653 return 0;
3654 }
3655
3656 /*
3657 * Removes a device from the thread if_list.
3658 */
3659 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3660 struct pktgen_dev *pkt_dev)
3661 {
3662 struct list_head *q, *n;
3663 struct pktgen_dev *p;
3664
3665 list_for_each_safe(q, n, &t->if_list) {
3666 p = list_entry(q, struct pktgen_dev, list);
3667 if (p == pkt_dev)
3668 list_del(&p->list);
3669 }
3670 }
3671
3672 static int pktgen_remove_device(struct pktgen_thread *t,
3673 struct pktgen_dev *pkt_dev)
3674 {
3675
3676 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3677
3678 if (pkt_dev->running) {
3679 pr_warning("WARNING: trying to remove a running interface, stopping it now\n");
3680 pktgen_stop_device(pkt_dev);
3681 }
3682
3683 /* Dis-associate from the interface */
3684
3685 if (pkt_dev->odev) {
3686 dev_put(pkt_dev->odev);
3687 pkt_dev->odev = NULL;
3688 }
3689
3690 /* And update the thread if_list */
3691
3692 _rem_dev_from_if_list(t, pkt_dev);
3693
3694 if (pkt_dev->entry)
3695 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3696
3697 #ifdef CONFIG_XFRM
3698 free_SAs(pkt_dev);
3699 #endif
3700 vfree(pkt_dev->flows);
3701 if (pkt_dev->page)
3702 put_page(pkt_dev->page);
3703 kfree(pkt_dev);
3704 return 0;
3705 }
3706
3707 static int __init pg_init(void)
3708 {
3709 int cpu;
3710 struct proc_dir_entry *pe;
3711
3712 pr_info("%s", version);
3713
3714 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3715 if (!pg_proc_dir)
3716 return -ENODEV;
3717
3718 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3719 if (pe == NULL) {
3720 pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL);
3721 proc_net_remove(&init_net, PG_PROC_DIR);
3722 return -EINVAL;
3723 }
3724
3725 /* Register us to receive netdevice events */
3726 register_netdevice_notifier(&pktgen_notifier_block);
3727
3728 for_each_online_cpu(cpu) {
3729 int err;
3730
3731 err = pktgen_create_thread(cpu);
3732 if (err)
3733 pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n",
3734 cpu, err);
3735 }
3736
3737 if (list_empty(&pktgen_threads)) {
3738 pr_err("ERROR: Initialization failed for all threads\n");
3739 unregister_netdevice_notifier(&pktgen_notifier_block);
3740 remove_proc_entry(PGCTRL, pg_proc_dir);
3741 proc_net_remove(&init_net, PG_PROC_DIR);
3742 return -ENODEV;
3743 }
3744
3745 return 0;
3746 }
3747
3748 static void __exit pg_cleanup(void)
3749 {
3750 struct pktgen_thread *t;
3751 struct list_head *q, *n;
3752
3753 /* Stop all interfaces & threads */
3754 pktgen_exiting = true;
3755
3756 list_for_each_safe(q, n, &pktgen_threads) {
3757 t = list_entry(q, struct pktgen_thread, th_list);
3758 kthread_stop(t->tsk);
3759 kfree(t);
3760 }
3761
3762 /* Un-register us from receiving netdevice events */
3763 unregister_netdevice_notifier(&pktgen_notifier_block);
3764
3765 /* Clean up proc file system */
3766 remove_proc_entry(PGCTRL, pg_proc_dir);
3767 proc_net_remove(&init_net, PG_PROC_DIR);
3768 }
3769
3770 module_init(pg_init);
3771 module_exit(pg_cleanup);
3772
3773 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3774 MODULE_DESCRIPTION("Packet Generator tool");
3775 MODULE_LICENSE("GPL");
3776 MODULE_VERSION(VERSION);
3777 module_param(pg_count_d, int, 0);
3778 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3779 module_param(pg_delay_d, int, 0);
3780 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3781 module_param(pg_clone_skb_d, int, 0);
3782 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3783 module_param(debug, int, 0);
3784 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
linux-next