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spi-topcliff-pch: Fix issue for transmitting over 4KByte
[zen-stable.git] / net / core / pktgen.c
blob4d8ce93cd5039b191b468fcb87f23ee0457c5cc4
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 long num_arg(const char __user *user_buffer, unsigned long maxlen,
771 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 if ((value > 0) &&
1074 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1075 return -ENOTSUPP;
1076 i += len;
1077 pkt_dev->clone_skb = value;
1078
1079 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1080 return count;
1081 }
1082 if (!strcmp(name, "count")) {
1083 len = num_arg(&user_buffer[i], 10, &value);
1084 if (len < 0)
1085 return len;
1086
1087 i += len;
1088 pkt_dev->count = value;
1089 sprintf(pg_result, "OK: count=%llu",
1090 (unsigned long long)pkt_dev->count);
1091 return count;
1092 }
1093 if (!strcmp(name, "src_mac_count")) {
1094 len = num_arg(&user_buffer[i], 10, &value);
1095 if (len < 0)
1096 return len;
1097
1098 i += len;
1099 if (pkt_dev->src_mac_count != value) {
1100 pkt_dev->src_mac_count = value;
1101 pkt_dev->cur_src_mac_offset = 0;
1102 }
1103 sprintf(pg_result, "OK: src_mac_count=%d",
1104 pkt_dev->src_mac_count);
1105 return count;
1106 }
1107 if (!strcmp(name, "dst_mac_count")) {
1108 len = num_arg(&user_buffer[i], 10, &value);
1109 if (len < 0)
1110 return len;
1111
1112 i += len;
1113 if (pkt_dev->dst_mac_count != value) {
1114 pkt_dev->dst_mac_count = value;
1115 pkt_dev->cur_dst_mac_offset = 0;
1116 }
1117 sprintf(pg_result, "OK: dst_mac_count=%d",
1118 pkt_dev->dst_mac_count);
1119 return count;
1120 }
1121 if (!strcmp(name, "node")) {
1122 len = num_arg(&user_buffer[i], 10, &value);
1123 if (len < 0)
1124 return len;
1125
1126 i += len;
1127
1128 if (node_possible(value)) {
1129 pkt_dev->node = value;
1130 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1131 if (pkt_dev->page) {
1132 put_page(pkt_dev->page);
1133 pkt_dev->page = NULL;
1134 }
1135 }
1136 else
1137 sprintf(pg_result, "ERROR: node not possible");
1138 return count;
1139 }
1140 if (!strcmp(name, "flag")) {
1141 char f[32];
1142 memset(f, 0, 32);
1143 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1144 if (len < 0)
1145 return len;
1146
1147 if (copy_from_user(f, &user_buffer[i], len))
1148 return -EFAULT;
1149 i += len;
1150 if (strcmp(f, "IPSRC_RND") == 0)
1151 pkt_dev->flags |= F_IPSRC_RND;
1152
1153 else if (strcmp(f, "!IPSRC_RND") == 0)
1154 pkt_dev->flags &= ~F_IPSRC_RND;
1155
1156 else if (strcmp(f, "TXSIZE_RND") == 0)
1157 pkt_dev->flags |= F_TXSIZE_RND;
1158
1159 else if (strcmp(f, "!TXSIZE_RND") == 0)
1160 pkt_dev->flags &= ~F_TXSIZE_RND;
1161
1162 else if (strcmp(f, "IPDST_RND") == 0)
1163 pkt_dev->flags |= F_IPDST_RND;
1164
1165 else if (strcmp(f, "!IPDST_RND") == 0)
1166 pkt_dev->flags &= ~F_IPDST_RND;
1167
1168 else if (strcmp(f, "UDPSRC_RND") == 0)
1169 pkt_dev->flags |= F_UDPSRC_RND;
1170
1171 else if (strcmp(f, "!UDPSRC_RND") == 0)
1172 pkt_dev->flags &= ~F_UDPSRC_RND;
1173
1174 else if (strcmp(f, "UDPDST_RND") == 0)
1175 pkt_dev->flags |= F_UDPDST_RND;
1176
1177 else if (strcmp(f, "!UDPDST_RND") == 0)
1178 pkt_dev->flags &= ~F_UDPDST_RND;
1179
1180 else if (strcmp(f, "MACSRC_RND") == 0)
1181 pkt_dev->flags |= F_MACSRC_RND;
1182
1183 else if (strcmp(f, "!MACSRC_RND") == 0)
1184 pkt_dev->flags &= ~F_MACSRC_RND;
1185
1186 else if (strcmp(f, "MACDST_RND") == 0)
1187 pkt_dev->flags |= F_MACDST_RND;
1188
1189 else if (strcmp(f, "!MACDST_RND") == 0)
1190 pkt_dev->flags &= ~F_MACDST_RND;
1191
1192 else if (strcmp(f, "MPLS_RND") == 0)
1193 pkt_dev->flags |= F_MPLS_RND;
1194
1195 else if (strcmp(f, "!MPLS_RND") == 0)
1196 pkt_dev->flags &= ~F_MPLS_RND;
1197
1198 else if (strcmp(f, "VID_RND") == 0)
1199 pkt_dev->flags |= F_VID_RND;
1200
1201 else if (strcmp(f, "!VID_RND") == 0)
1202 pkt_dev->flags &= ~F_VID_RND;
1203
1204 else if (strcmp(f, "SVID_RND") == 0)
1205 pkt_dev->flags |= F_SVID_RND;
1206
1207 else if (strcmp(f, "!SVID_RND") == 0)
1208 pkt_dev->flags &= ~F_SVID_RND;
1209
1210 else if (strcmp(f, "FLOW_SEQ") == 0)
1211 pkt_dev->flags |= F_FLOW_SEQ;
1212
1213 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1214 pkt_dev->flags |= F_QUEUE_MAP_RND;
1215
1216 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1217 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1218
1219 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1220 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1221
1222 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1223 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1224 #ifdef CONFIG_XFRM
1225 else if (strcmp(f, "IPSEC") == 0)
1226 pkt_dev->flags |= F_IPSEC_ON;
1227 #endif
1228
1229 else if (strcmp(f, "!IPV6") == 0)
1230 pkt_dev->flags &= ~F_IPV6;
1231
1232 else if (strcmp(f, "NODE_ALLOC") == 0)
1233 pkt_dev->flags |= F_NODE;
1234
1235 else if (strcmp(f, "!NODE_ALLOC") == 0)
1236 pkt_dev->flags &= ~F_NODE;
1237
1238 else {
1239 sprintf(pg_result,
1240 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1241 f,
1242 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1243 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n");
1244 return count;
1245 }
1246 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1247 return count;
1248 }
1249 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1250 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1251 if (len < 0)
1252 return len;
1253
1254 if (copy_from_user(buf, &user_buffer[i], len))
1255 return -EFAULT;
1256 buf[len] = 0;
1257 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1258 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1259 strncpy(pkt_dev->dst_min, buf, len);
1260 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1261 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1262 }
1263 if (debug)
1264 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1265 pkt_dev->dst_min);
1266 i += len;
1267 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1268 return count;
1269 }
1270 if (!strcmp(name, "dst_max")) {
1271 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1272 if (len < 0)
1273 return len;
1274
1275
1276 if (copy_from_user(buf, &user_buffer[i], len))
1277 return -EFAULT;
1278
1279 buf[len] = 0;
1280 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1281 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1282 strncpy(pkt_dev->dst_max, buf, len);
1283 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1284 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1285 }
1286 if (debug)
1287 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1288 pkt_dev->dst_max);
1289 i += len;
1290 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1291 return count;
1292 }
1293 if (!strcmp(name, "dst6")) {
1294 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1295 if (len < 0)
1296 return len;
1297
1298 pkt_dev->flags |= F_IPV6;
1299
1300 if (copy_from_user(buf, &user_buffer[i], len))
1301 return -EFAULT;
1302 buf[len] = 0;
1303
1304 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1305 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1306
1307 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1308
1309 if (debug)
1310 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1311
1312 i += len;
1313 sprintf(pg_result, "OK: dst6=%s", buf);
1314 return count;
1315 }
1316 if (!strcmp(name, "dst6_min")) {
1317 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1318 if (len < 0)
1319 return len;
1320
1321 pkt_dev->flags |= F_IPV6;
1322
1323 if (copy_from_user(buf, &user_buffer[i], len))
1324 return -EFAULT;
1325 buf[len] = 0;
1326
1327 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1328 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1329
1330 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
1331 if (debug)
1332 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1333
1334 i += len;
1335 sprintf(pg_result, "OK: dst6_min=%s", buf);
1336 return count;
1337 }
1338 if (!strcmp(name, "dst6_max")) {
1339 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1340 if (len < 0)
1341 return len;
1342
1343 pkt_dev->flags |= F_IPV6;
1344
1345 if (copy_from_user(buf, &user_buffer[i], len))
1346 return -EFAULT;
1347 buf[len] = 0;
1348
1349 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1350 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1351
1352 if (debug)
1353 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1354
1355 i += len;
1356 sprintf(pg_result, "OK: dst6_max=%s", buf);
1357 return count;
1358 }
1359 if (!strcmp(name, "src6")) {
1360 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1361 if (len < 0)
1362 return len;
1363
1364 pkt_dev->flags |= F_IPV6;
1365
1366 if (copy_from_user(buf, &user_buffer[i], len))
1367 return -EFAULT;
1368 buf[len] = 0;
1369
1370 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1371 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1372
1373 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1374
1375 if (debug)
1376 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1377
1378 i += len;
1379 sprintf(pg_result, "OK: src6=%s", buf);
1380 return count;
1381 }
1382 if (!strcmp(name, "src_min")) {
1383 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1384 if (len < 0)
1385 return len;
1386
1387 if (copy_from_user(buf, &user_buffer[i], len))
1388 return -EFAULT;
1389 buf[len] = 0;
1390 if (strcmp(buf, pkt_dev->src_min) != 0) {
1391 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1392 strncpy(pkt_dev->src_min, buf, len);
1393 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1394 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1395 }
1396 if (debug)
1397 printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1398 pkt_dev->src_min);
1399 i += len;
1400 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1401 return count;
1402 }
1403 if (!strcmp(name, "src_max")) {
1404 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1405 if (len < 0)
1406 return len;
1407
1408 if (copy_from_user(buf, &user_buffer[i], len))
1409 return -EFAULT;
1410 buf[len] = 0;
1411 if (strcmp(buf, pkt_dev->src_max) != 0) {
1412 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1413 strncpy(pkt_dev->src_max, buf, len);
1414 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1415 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1416 }
1417 if (debug)
1418 printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1419 pkt_dev->src_max);
1420 i += len;
1421 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1422 return count;
1423 }
1424 if (!strcmp(name, "dst_mac")) {
1425 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1426 if (len < 0)
1427 return len;
1428
1429 memset(valstr, 0, sizeof(valstr));
1430 if (copy_from_user(valstr, &user_buffer[i], len))
1431 return -EFAULT;
1432
1433 if (!mac_pton(valstr, pkt_dev->dst_mac))
1434 return -EINVAL;
1435 /* Set up Dest MAC */
1436 memcpy(&pkt_dev->hh[0], pkt_dev->dst_mac, ETH_ALEN);
1437
1438 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1439 return count;
1440 }
1441 if (!strcmp(name, "src_mac")) {
1442 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1443 if (len < 0)
1444 return len;
1445
1446 memset(valstr, 0, sizeof(valstr));
1447 if (copy_from_user(valstr, &user_buffer[i], len))
1448 return -EFAULT;
1449
1450 if (!mac_pton(valstr, pkt_dev->src_mac))
1451 return -EINVAL;
1452 /* Set up Src MAC */
1453 memcpy(&pkt_dev->hh[6], pkt_dev->src_mac, ETH_ALEN);
1454
1455 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1456 return count;
1457 }
1458
1459 if (!strcmp(name, "clear_counters")) {
1460 pktgen_clear_counters(pkt_dev);
1461 sprintf(pg_result, "OK: Clearing counters.\n");
1462 return count;
1463 }
1464
1465 if (!strcmp(name, "flows")) {
1466 len = num_arg(&user_buffer[i], 10, &value);
1467 if (len < 0)
1468 return len;
1469
1470 i += len;
1471 if (value > MAX_CFLOWS)
1472 value = MAX_CFLOWS;
1473
1474 pkt_dev->cflows = value;
1475 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1476 return count;
1477 }
1478
1479 if (!strcmp(name, "flowlen")) {
1480 len = num_arg(&user_buffer[i], 10, &value);
1481 if (len < 0)
1482 return len;
1483
1484 i += len;
1485 pkt_dev->lflow = value;
1486 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1487 return count;
1488 }
1489
1490 if (!strcmp(name, "queue_map_min")) {
1491 len = num_arg(&user_buffer[i], 5, &value);
1492 if (len < 0)
1493 return len;
1494
1495 i += len;
1496 pkt_dev->queue_map_min = value;
1497 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1498 return count;
1499 }
1500
1501 if (!strcmp(name, "queue_map_max")) {
1502 len = num_arg(&user_buffer[i], 5, &value);
1503 if (len < 0)
1504 return len;
1505
1506 i += len;
1507 pkt_dev->queue_map_max = value;
1508 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1509 return count;
1510 }
1511
1512 if (!strcmp(name, "mpls")) {
1513 unsigned n, cnt;
1514
1515 len = get_labels(&user_buffer[i], pkt_dev);
1516 if (len < 0)
1517 return len;
1518 i += len;
1519 cnt = sprintf(pg_result, "OK: mpls=");
1520 for (n = 0; n < pkt_dev->nr_labels; n++)
1521 cnt += sprintf(pg_result + cnt,
1522 "%08x%s", ntohl(pkt_dev->labels[n]),
1523 n == pkt_dev->nr_labels-1 ? "" : ",");
1524
1525 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1526 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1527 pkt_dev->svlan_id = 0xffff;
1528
1529 if (debug)
1530 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1531 }
1532 return count;
1533 }
1534
1535 if (!strcmp(name, "vlan_id")) {
1536 len = num_arg(&user_buffer[i], 4, &value);
1537 if (len < 0)
1538 return len;
1539
1540 i += len;
1541 if (value <= 4095) {
1542 pkt_dev->vlan_id = value; /* turn on VLAN */
1543
1544 if (debug)
1545 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1546
1547 if (debug && pkt_dev->nr_labels)
1548 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1549
1550 pkt_dev->nr_labels = 0; /* turn off MPLS */
1551 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1552 } else {
1553 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1554 pkt_dev->svlan_id = 0xffff;
1555
1556 if (debug)
1557 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1558 }
1559 return count;
1560 }
1561
1562 if (!strcmp(name, "vlan_p")) {
1563 len = num_arg(&user_buffer[i], 1, &value);
1564 if (len < 0)
1565 return len;
1566
1567 i += len;
1568 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1569 pkt_dev->vlan_p = value;
1570 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1571 } else {
1572 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1573 }
1574 return count;
1575 }
1576
1577 if (!strcmp(name, "vlan_cfi")) {
1578 len = num_arg(&user_buffer[i], 1, &value);
1579 if (len < 0)
1580 return len;
1581
1582 i += len;
1583 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1584 pkt_dev->vlan_cfi = value;
1585 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1586 } else {
1587 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1588 }
1589 return count;
1590 }
1591
1592 if (!strcmp(name, "svlan_id")) {
1593 len = num_arg(&user_buffer[i], 4, &value);
1594 if (len < 0)
1595 return len;
1596
1597 i += len;
1598 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1599 pkt_dev->svlan_id = value; /* turn on SVLAN */
1600
1601 if (debug)
1602 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1603
1604 if (debug && pkt_dev->nr_labels)
1605 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1606
1607 pkt_dev->nr_labels = 0; /* turn off MPLS */
1608 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1609 } else {
1610 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1611 pkt_dev->svlan_id = 0xffff;
1612
1613 if (debug)
1614 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1615 }
1616 return count;
1617 }
1618
1619 if (!strcmp(name, "svlan_p")) {
1620 len = num_arg(&user_buffer[i], 1, &value);
1621 if (len < 0)
1622 return len;
1623
1624 i += len;
1625 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1626 pkt_dev->svlan_p = value;
1627 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1628 } else {
1629 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1630 }
1631 return count;
1632 }
1633
1634 if (!strcmp(name, "svlan_cfi")) {
1635 len = num_arg(&user_buffer[i], 1, &value);
1636 if (len < 0)
1637 return len;
1638
1639 i += len;
1640 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1641 pkt_dev->svlan_cfi = value;
1642 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1643 } else {
1644 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1645 }
1646 return count;
1647 }
1648
1649 if (!strcmp(name, "tos")) {
1650 __u32 tmp_value = 0;
1651 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1652 if (len < 0)
1653 return len;
1654
1655 i += len;
1656 if (len == 2) {
1657 pkt_dev->tos = tmp_value;
1658 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1659 } else {
1660 sprintf(pg_result, "ERROR: tos must be 00-ff");
1661 }
1662 return count;
1663 }
1664
1665 if (!strcmp(name, "traffic_class")) {
1666 __u32 tmp_value = 0;
1667 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1668 if (len < 0)
1669 return len;
1670
1671 i += len;
1672 if (len == 2) {
1673 pkt_dev->traffic_class = tmp_value;
1674 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1675 } else {
1676 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1677 }
1678 return count;
1679 }
1680
1681 if (!strcmp(name, "skb_priority")) {
1682 len = num_arg(&user_buffer[i], 9, &value);
1683 if (len < 0)
1684 return len;
1685
1686 i += len;
1687 pkt_dev->skb_priority = value;
1688 sprintf(pg_result, "OK: skb_priority=%i",
1689 pkt_dev->skb_priority);
1690 return count;
1691 }
1692
1693 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1694 return -EINVAL;
1695 }
1696
1697 static int pktgen_if_open(struct inode *inode, struct file *file)
1698 {
1699 return single_open(file, pktgen_if_show, PDE(inode)->data);
1700 }
1701
1702 static const struct file_operations pktgen_if_fops = {
1703 .owner = THIS_MODULE,
1704 .open = pktgen_if_open,
1705 .read = seq_read,
1706 .llseek = seq_lseek,
1707 .write = pktgen_if_write,
1708 .release = single_release,
1709 };
1710
1711 static int pktgen_thread_show(struct seq_file *seq, void *v)
1712 {
1713 struct pktgen_thread *t = seq->private;
1714 const struct pktgen_dev *pkt_dev;
1715
1716 BUG_ON(!t);
1717
1718 seq_printf(seq, "Running: ");
1719
1720 if_lock(t);
1721 list_for_each_entry(pkt_dev, &t->if_list, list)
1722 if (pkt_dev->running)
1723 seq_printf(seq, "%s ", pkt_dev->odevname);
1724
1725 seq_printf(seq, "\nStopped: ");
1726
1727 list_for_each_entry(pkt_dev, &t->if_list, list)
1728 if (!pkt_dev->running)
1729 seq_printf(seq, "%s ", pkt_dev->odevname);
1730
1731 if (t->result[0])
1732 seq_printf(seq, "\nResult: %s\n", t->result);
1733 else
1734 seq_printf(seq, "\nResult: NA\n");
1735
1736 if_unlock(t);
1737
1738 return 0;
1739 }
1740
1741 static ssize_t pktgen_thread_write(struct file *file,
1742 const char __user * user_buffer,
1743 size_t count, loff_t * offset)
1744 {
1745 struct seq_file *seq = file->private_data;
1746 struct pktgen_thread *t = seq->private;
1747 int i, max, len, ret;
1748 char name[40];
1749 char *pg_result;
1750
1751 if (count < 1) {
1752 // sprintf(pg_result, "Wrong command format");
1753 return -EINVAL;
1754 }
1755
1756 max = count;
1757 len = count_trail_chars(user_buffer, max);
1758 if (len < 0)
1759 return len;
1760
1761 i = len;
1762
1763 /* Read variable name */
1764
1765 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1766 if (len < 0)
1767 return len;
1768
1769 memset(name, 0, sizeof(name));
1770 if (copy_from_user(name, &user_buffer[i], len))
1771 return -EFAULT;
1772 i += len;
1773
1774 max = count - i;
1775 len = count_trail_chars(&user_buffer[i], max);
1776 if (len < 0)
1777 return len;
1778
1779 i += len;
1780
1781 if (debug)
1782 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1783 name, (unsigned long)count);
1784
1785 if (!t) {
1786 pr_err("ERROR: No thread\n");
1787 ret = -EINVAL;
1788 goto out;
1789 }
1790
1791 pg_result = &(t->result[0]);
1792
1793 if (!strcmp(name, "add_device")) {
1794 char f[32];
1795 memset(f, 0, 32);
1796 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1797 if (len < 0) {
1798 ret = len;
1799 goto out;
1800 }
1801 if (copy_from_user(f, &user_buffer[i], len))
1802 return -EFAULT;
1803 i += len;
1804 mutex_lock(&pktgen_thread_lock);
1805 pktgen_add_device(t, f);
1806 mutex_unlock(&pktgen_thread_lock);
1807 ret = count;
1808 sprintf(pg_result, "OK: add_device=%s", f);
1809 goto out;
1810 }
1811
1812 if (!strcmp(name, "rem_device_all")) {
1813 mutex_lock(&pktgen_thread_lock);
1814 t->control |= T_REMDEVALL;
1815 mutex_unlock(&pktgen_thread_lock);
1816 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1817 ret = count;
1818 sprintf(pg_result, "OK: rem_device_all");
1819 goto out;
1820 }
1821
1822 if (!strcmp(name, "max_before_softirq")) {
1823 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1824 ret = count;
1825 goto out;
1826 }
1827
1828 ret = -EINVAL;
1829 out:
1830 return ret;
1831 }
1832
1833 static int pktgen_thread_open(struct inode *inode, struct file *file)
1834 {
1835 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1836 }
1837
1838 static const struct file_operations pktgen_thread_fops = {
1839 .owner = THIS_MODULE,
1840 .open = pktgen_thread_open,
1841 .read = seq_read,
1842 .llseek = seq_lseek,
1843 .write = pktgen_thread_write,
1844 .release = single_release,
1845 };
1846
1847 /* Think find or remove for NN */
1848 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1849 {
1850 struct pktgen_thread *t;
1851 struct pktgen_dev *pkt_dev = NULL;
1852 bool exact = (remove == FIND);
1853
1854 list_for_each_entry(t, &pktgen_threads, th_list) {
1855 pkt_dev = pktgen_find_dev(t, ifname, exact);
1856 if (pkt_dev) {
1857 if (remove) {
1858 if_lock(t);
1859 pkt_dev->removal_mark = 1;
1860 t->control |= T_REMDEV;
1861 if_unlock(t);
1862 }
1863 break;
1864 }
1865 }
1866 return pkt_dev;
1867 }
1868
1869 /*
1870 * mark a device for removal
1871 */
1872 static void pktgen_mark_device(const char *ifname)
1873 {
1874 struct pktgen_dev *pkt_dev = NULL;
1875 const int max_tries = 10, msec_per_try = 125;
1876 int i = 0;
1877
1878 mutex_lock(&pktgen_thread_lock);
1879 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1880
1881 while (1) {
1882
1883 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1884 if (pkt_dev == NULL)
1885 break; /* success */
1886
1887 mutex_unlock(&pktgen_thread_lock);
1888 pr_debug("%s: waiting for %s to disappear....\n",
1889 __func__, ifname);
1890 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1891 mutex_lock(&pktgen_thread_lock);
1892
1893 if (++i >= max_tries) {
1894 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1895 __func__, msec_per_try * i, ifname);
1896 break;
1897 }
1898
1899 }
1900
1901 mutex_unlock(&pktgen_thread_lock);
1902 }
1903
1904 static void pktgen_change_name(struct net_device *dev)
1905 {
1906 struct pktgen_thread *t;
1907
1908 list_for_each_entry(t, &pktgen_threads, th_list) {
1909 struct pktgen_dev *pkt_dev;
1910
1911 list_for_each_entry(pkt_dev, &t->if_list, list) {
1912 if (pkt_dev->odev != dev)
1913 continue;
1914
1915 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1916
1917 pkt_dev->entry = proc_create_data(dev->name, 0600,
1918 pg_proc_dir,
1919 &pktgen_if_fops,
1920 pkt_dev);
1921 if (!pkt_dev->entry)
1922 pr_err("can't move proc entry for '%s'\n",
1923 dev->name);
1924 break;
1925 }
1926 }
1927 }
1928
1929 static int pktgen_device_event(struct notifier_block *unused,
1930 unsigned long event, void *ptr)
1931 {
1932 struct net_device *dev = ptr;
1933
1934 if (!net_eq(dev_net(dev), &init_net))
1935 return NOTIFY_DONE;
1936
1937 /* It is OK that we do not hold the group lock right now,
1938 * as we run under the RTNL lock.
1939 */
1940
1941 switch (event) {
1942 case NETDEV_CHANGENAME:
1943 pktgen_change_name(dev);
1944 break;
1945
1946 case NETDEV_UNREGISTER:
1947 pktgen_mark_device(dev->name);
1948 break;
1949 }
1950
1951 return NOTIFY_DONE;
1952 }
1953
1954 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev,
1955 const char *ifname)
1956 {
1957 char b[IFNAMSIZ+5];
1958 int i;
1959
1960 for (i = 0; ifname[i] != '@'; i++) {
1961 if (i == IFNAMSIZ)
1962 break;
1963
1964 b[i] = ifname[i];
1965 }
1966 b[i] = 0;
1967
1968 return dev_get_by_name(&init_net, b);
1969 }
1970
1971
1972 /* Associate pktgen_dev with a device. */
1973
1974 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1975 {
1976 struct net_device *odev;
1977 int err;
1978
1979 /* Clean old setups */
1980 if (pkt_dev->odev) {
1981 dev_put(pkt_dev->odev);
1982 pkt_dev->odev = NULL;
1983 }
1984
1985 odev = pktgen_dev_get_by_name(pkt_dev, ifname);
1986 if (!odev) {
1987 pr_err("no such netdevice: \"%s\"\n", ifname);
1988 return -ENODEV;
1989 }
1990
1991 if (odev->type != ARPHRD_ETHER) {
1992 pr_err("not an ethernet device: \"%s\"\n", ifname);
1993 err = -EINVAL;
1994 } else if (!netif_running(odev)) {
1995 pr_err("device is down: \"%s\"\n", ifname);
1996 err = -ENETDOWN;
1997 } else {
1998 pkt_dev->odev = odev;
1999 return 0;
2000 }
2001
2002 dev_put(odev);
2003 return err;
2004 }
2005
2006 /* Read pkt_dev from the interface and set up internal pktgen_dev
2007 * structure to have the right information to create/send packets
2008 */
2009 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2010 {
2011 int ntxq;
2012
2013 if (!pkt_dev->odev) {
2014 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2015 sprintf(pkt_dev->result,
2016 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2017 return;
2018 }
2019
2020 /* make sure that we don't pick a non-existing transmit queue */
2021 ntxq = pkt_dev->odev->real_num_tx_queues;
2022
2023 if (ntxq <= pkt_dev->queue_map_min) {
2024 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2025 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2026 pkt_dev->odevname);
2027 pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2028 }
2029 if (pkt_dev->queue_map_max >= ntxq) {
2030 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2031 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2032 pkt_dev->odevname);
2033 pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2034 }
2035
2036 /* Default to the interface's mac if not explicitly set. */
2037
2038 if (is_zero_ether_addr(pkt_dev->src_mac))
2039 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2040
2041 /* Set up Dest MAC */
2042 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2043
2044 /* Set up pkt size */
2045 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2046
2047 if (pkt_dev->flags & F_IPV6) {
2048 /*
2049 * Skip this automatic address setting until locks or functions
2050 * gets exported
2051 */
2052
2053 #ifdef NOTNOW
2054 int i, set = 0, err = 1;
2055 struct inet6_dev *idev;
2056
2057 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2058 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2059 set = 1;
2060 break;
2061 }
2062
2063 if (!set) {
2064
2065 /*
2066 * Use linklevel address if unconfigured.
2067 *
2068 * use ipv6_get_lladdr if/when it's get exported
2069 */
2070
2071 rcu_read_lock();
2072 idev = __in6_dev_get(pkt_dev->odev);
2073 if (idev) {
2074 struct inet6_ifaddr *ifp;
2075
2076 read_lock_bh(&idev->lock);
2077 for (ifp = idev->addr_list; ifp;
2078 ifp = ifp->if_next) {
2079 if (ifp->scope == IFA_LINK &&
2080 !(ifp->flags & IFA_F_TENTATIVE)) {
2081 pkt_dev->cur_in6_saddr = ifp->addr;
2082 err = 0;
2083 break;
2084 }
2085 }
2086 read_unlock_bh(&idev->lock);
2087 }
2088 rcu_read_unlock();
2089 if (err)
2090 pr_err("ERROR: IPv6 link address not available\n");
2091 }
2092 #endif
2093 } else {
2094 pkt_dev->saddr_min = 0;
2095 pkt_dev->saddr_max = 0;
2096 if (strlen(pkt_dev->src_min) == 0) {
2097
2098 struct in_device *in_dev;
2099
2100 rcu_read_lock();
2101 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2102 if (in_dev) {
2103 if (in_dev->ifa_list) {
2104 pkt_dev->saddr_min =
2105 in_dev->ifa_list->ifa_address;
2106 pkt_dev->saddr_max = pkt_dev->saddr_min;
2107 }
2108 }
2109 rcu_read_unlock();
2110 } else {
2111 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2112 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2113 }
2114
2115 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2116 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2117 }
2118 /* Initialize current values. */
2119 pkt_dev->cur_dst_mac_offset = 0;
2120 pkt_dev->cur_src_mac_offset = 0;
2121 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2122 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2123 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2124 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2125 pkt_dev->nflows = 0;
2126 }
2127
2128
2129 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2130 {
2131 ktime_t start_time, end_time;
2132 s64 remaining;
2133 struct hrtimer_sleeper t;
2134
2135 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2136 hrtimer_set_expires(&t.timer, spin_until);
2137
2138 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2139 if (remaining <= 0) {
2140 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2141 return;
2142 }
2143
2144 start_time = ktime_now();
2145 if (remaining < 100000) {
2146 /* for small delays (<100us), just loop until limit is reached */
2147 do {
2148 end_time = ktime_now();
2149 } while (ktime_lt(end_time, spin_until));
2150 } else {
2151 /* see do_nanosleep */
2152 hrtimer_init_sleeper(&t, current);
2153 do {
2154 set_current_state(TASK_INTERRUPTIBLE);
2155 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2156 if (!hrtimer_active(&t.timer))
2157 t.task = NULL;
2158
2159 if (likely(t.task))
2160 schedule();
2161
2162 hrtimer_cancel(&t.timer);
2163 } while (t.task && pkt_dev->running && !signal_pending(current));
2164 __set_current_state(TASK_RUNNING);
2165 end_time = ktime_now();
2166 }
2167
2168 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2169 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2170 }
2171
2172 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2173 {
2174 pkt_dev->pkt_overhead = 0;
2175 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2176 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2177 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2178 }
2179
2180 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2181 {
2182 return !!(pkt_dev->flows[flow].flags & F_INIT);
2183 }
2184
2185 static inline int f_pick(struct pktgen_dev *pkt_dev)
2186 {
2187 int flow = pkt_dev->curfl;
2188
2189 if (pkt_dev->flags & F_FLOW_SEQ) {
2190 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2191 /* reset time */
2192 pkt_dev->flows[flow].count = 0;
2193 pkt_dev->flows[flow].flags = 0;
2194 pkt_dev->curfl += 1;
2195 if (pkt_dev->curfl >= pkt_dev->cflows)
2196 pkt_dev->curfl = 0; /*reset */
2197 }
2198 } else {
2199 flow = random32() % pkt_dev->cflows;
2200 pkt_dev->curfl = flow;
2201
2202 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2203 pkt_dev->flows[flow].count = 0;
2204 pkt_dev->flows[flow].flags = 0;
2205 }
2206 }
2207
2208 return pkt_dev->curfl;
2209 }
2210
2211
2212 #ifdef CONFIG_XFRM
2213 /* If there was already an IPSEC SA, we keep it as is, else
2214 * we go look for it ...
2215 */
2216 #define DUMMY_MARK 0
2217 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2218 {
2219 struct xfrm_state *x = pkt_dev->flows[flow].x;
2220 if (!x) {
2221 /*slow path: we dont already have xfrm_state*/
2222 x = xfrm_stateonly_find(&init_net, DUMMY_MARK,
2223 (xfrm_address_t *)&pkt_dev->cur_daddr,
2224 (xfrm_address_t *)&pkt_dev->cur_saddr,
2225 AF_INET,
2226 pkt_dev->ipsmode,
2227 pkt_dev->ipsproto, 0);
2228 if (x) {
2229 pkt_dev->flows[flow].x = x;
2230 set_pkt_overhead(pkt_dev);
2231 pkt_dev->pkt_overhead += x->props.header_len;
2232 }
2233
2234 }
2235 }
2236 #endif
2237 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2238 {
2239
2240 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2241 pkt_dev->cur_queue_map = smp_processor_id();
2242
2243 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2244 __u16 t;
2245 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2246 t = random32() %
2247 (pkt_dev->queue_map_max -
2248 pkt_dev->queue_map_min + 1)
2249 + pkt_dev->queue_map_min;
2250 } else {
2251 t = pkt_dev->cur_queue_map + 1;
2252 if (t > pkt_dev->queue_map_max)
2253 t = pkt_dev->queue_map_min;
2254 }
2255 pkt_dev->cur_queue_map = t;
2256 }
2257 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2258 }
2259
2260 /* Increment/randomize headers according to flags and current values
2261 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2262 */
2263 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2264 {
2265 __u32 imn;
2266 __u32 imx;
2267 int flow = 0;
2268
2269 if (pkt_dev->cflows)
2270 flow = f_pick(pkt_dev);
2271
2272 /* Deal with source MAC */
2273 if (pkt_dev->src_mac_count > 1) {
2274 __u32 mc;
2275 __u32 tmp;
2276
2277 if (pkt_dev->flags & F_MACSRC_RND)
2278 mc = random32() % pkt_dev->src_mac_count;
2279 else {
2280 mc = pkt_dev->cur_src_mac_offset++;
2281 if (pkt_dev->cur_src_mac_offset >=
2282 pkt_dev->src_mac_count)
2283 pkt_dev->cur_src_mac_offset = 0;
2284 }
2285
2286 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2287 pkt_dev->hh[11] = tmp;
2288 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2289 pkt_dev->hh[10] = tmp;
2290 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2291 pkt_dev->hh[9] = tmp;
2292 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2293 pkt_dev->hh[8] = tmp;
2294 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2295 pkt_dev->hh[7] = tmp;
2296 }
2297
2298 /* Deal with Destination MAC */
2299 if (pkt_dev->dst_mac_count > 1) {
2300 __u32 mc;
2301 __u32 tmp;
2302
2303 if (pkt_dev->flags & F_MACDST_RND)
2304 mc = random32() % pkt_dev->dst_mac_count;
2305
2306 else {
2307 mc = pkt_dev->cur_dst_mac_offset++;
2308 if (pkt_dev->cur_dst_mac_offset >=
2309 pkt_dev->dst_mac_count) {
2310 pkt_dev->cur_dst_mac_offset = 0;
2311 }
2312 }
2313
2314 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2315 pkt_dev->hh[5] = tmp;
2316 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2317 pkt_dev->hh[4] = tmp;
2318 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2319 pkt_dev->hh[3] = tmp;
2320 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2321 pkt_dev->hh[2] = tmp;
2322 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2323 pkt_dev->hh[1] = tmp;
2324 }
2325
2326 if (pkt_dev->flags & F_MPLS_RND) {
2327 unsigned i;
2328 for (i = 0; i < pkt_dev->nr_labels; i++)
2329 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2330 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2331 ((__force __be32)random32() &
2332 htonl(0x000fffff));
2333 }
2334
2335 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2336 pkt_dev->vlan_id = random32() & (4096-1);
2337 }
2338
2339 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2340 pkt_dev->svlan_id = random32() & (4096 - 1);
2341 }
2342
2343 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2344 if (pkt_dev->flags & F_UDPSRC_RND)
2345 pkt_dev->cur_udp_src = random32() %
2346 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2347 + pkt_dev->udp_src_min;
2348
2349 else {
2350 pkt_dev->cur_udp_src++;
2351 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2352 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2353 }
2354 }
2355
2356 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2357 if (pkt_dev->flags & F_UDPDST_RND) {
2358 pkt_dev->cur_udp_dst = random32() %
2359 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2360 + pkt_dev->udp_dst_min;
2361 } else {
2362 pkt_dev->cur_udp_dst++;
2363 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2364 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2365 }
2366 }
2367
2368 if (!(pkt_dev->flags & F_IPV6)) {
2369
2370 imn = ntohl(pkt_dev->saddr_min);
2371 imx = ntohl(pkt_dev->saddr_max);
2372 if (imn < imx) {
2373 __u32 t;
2374 if (pkt_dev->flags & F_IPSRC_RND)
2375 t = random32() % (imx - imn) + imn;
2376 else {
2377 t = ntohl(pkt_dev->cur_saddr);
2378 t++;
2379 if (t > imx)
2380 t = imn;
2381
2382 }
2383 pkt_dev->cur_saddr = htonl(t);
2384 }
2385
2386 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2387 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2388 } else {
2389 imn = ntohl(pkt_dev->daddr_min);
2390 imx = ntohl(pkt_dev->daddr_max);
2391 if (imn < imx) {
2392 __u32 t;
2393 __be32 s;
2394 if (pkt_dev->flags & F_IPDST_RND) {
2395
2396 t = random32() % (imx - imn) + imn;
2397 s = htonl(t);
2398
2399 while (ipv4_is_loopback(s) ||
2400 ipv4_is_multicast(s) ||
2401 ipv4_is_lbcast(s) ||
2402 ipv4_is_zeronet(s) ||
2403 ipv4_is_local_multicast(s)) {
2404 t = random32() % (imx - imn) + imn;
2405 s = htonl(t);
2406 }
2407 pkt_dev->cur_daddr = s;
2408 } else {
2409 t = ntohl(pkt_dev->cur_daddr);
2410 t++;
2411 if (t > imx) {
2412 t = imn;
2413 }
2414 pkt_dev->cur_daddr = htonl(t);
2415 }
2416 }
2417 if (pkt_dev->cflows) {
2418 pkt_dev->flows[flow].flags |= F_INIT;
2419 pkt_dev->flows[flow].cur_daddr =
2420 pkt_dev->cur_daddr;
2421 #ifdef CONFIG_XFRM
2422 if (pkt_dev->flags & F_IPSEC_ON)
2423 get_ipsec_sa(pkt_dev, flow);
2424 #endif
2425 pkt_dev->nflows++;
2426 }
2427 }
2428 } else { /* IPV6 * */
2429
2430 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2431 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2432 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2433 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2434 else {
2435 int i;
2436
2437 /* Only random destinations yet */
2438
2439 for (i = 0; i < 4; i++) {
2440 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2441 (((__force __be32)random32() |
2442 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2443 pkt_dev->max_in6_daddr.s6_addr32[i]);
2444 }
2445 }
2446 }
2447
2448 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2449 __u32 t;
2450 if (pkt_dev->flags & F_TXSIZE_RND) {
2451 t = random32() %
2452 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2453 + pkt_dev->min_pkt_size;
2454 } else {
2455 t = pkt_dev->cur_pkt_size + 1;
2456 if (t > pkt_dev->max_pkt_size)
2457 t = pkt_dev->min_pkt_size;
2458 }
2459 pkt_dev->cur_pkt_size = t;
2460 }
2461
2462 set_cur_queue_map(pkt_dev);
2463
2464 pkt_dev->flows[flow].count++;
2465 }
2466
2467
2468 #ifdef CONFIG_XFRM
2469 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2470 {
2471 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2472 int err = 0;
2473
2474 if (!x)
2475 return 0;
2476 /* XXX: we dont support tunnel mode for now until
2477 * we resolve the dst issue */
2478 if (x->props.mode != XFRM_MODE_TRANSPORT)
2479 return 0;
2480
2481 spin_lock(&x->lock);
2482
2483 err = x->outer_mode->output(x, skb);
2484 if (err)
2485 goto error;
2486 err = x->type->output(x, skb);
2487 if (err)
2488 goto error;
2489
2490 x->curlft.bytes += skb->len;
2491 x->curlft.packets++;
2492 error:
2493 spin_unlock(&x->lock);
2494 return err;
2495 }
2496
2497 static void free_SAs(struct pktgen_dev *pkt_dev)
2498 {
2499 if (pkt_dev->cflows) {
2500 /* let go of the SAs if we have them */
2501 int i;
2502 for (i = 0; i < pkt_dev->cflows; i++) {
2503 struct xfrm_state *x = pkt_dev->flows[i].x;
2504 if (x) {
2505 xfrm_state_put(x);
2506 pkt_dev->flows[i].x = NULL;
2507 }
2508 }
2509 }
2510 }
2511
2512 static int process_ipsec(struct pktgen_dev *pkt_dev,
2513 struct sk_buff *skb, __be16 protocol)
2514 {
2515 if (pkt_dev->flags & F_IPSEC_ON) {
2516 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2517 int nhead = 0;
2518 if (x) {
2519 int ret;
2520 __u8 *eth;
2521 nhead = x->props.header_len - skb_headroom(skb);
2522 if (nhead > 0) {
2523 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2524 if (ret < 0) {
2525 pr_err("Error expanding ipsec packet %d\n",
2526 ret);
2527 goto err;
2528 }
2529 }
2530
2531 /* ipsec is not expecting ll header */
2532 skb_pull(skb, ETH_HLEN);
2533 ret = pktgen_output_ipsec(skb, pkt_dev);
2534 if (ret) {
2535 pr_err("Error creating ipsec packet %d\n", ret);
2536 goto err;
2537 }
2538 /* restore ll */
2539 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2540 memcpy(eth, pkt_dev->hh, 12);
2541 *(u16 *) &eth[12] = protocol;
2542 }
2543 }
2544 return 1;
2545 err:
2546 kfree_skb(skb);
2547 return 0;
2548 }
2549 #endif
2550
2551 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2552 {
2553 unsigned i;
2554 for (i = 0; i < pkt_dev->nr_labels; i++)
2555 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2556
2557 mpls--;
2558 *mpls |= MPLS_STACK_BOTTOM;
2559 }
2560
2561 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2562 unsigned int prio)
2563 {
2564 return htons(id | (cfi << 12) | (prio << 13));
2565 }
2566
2567 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2568 int datalen)
2569 {
2570 struct timeval timestamp;
2571 struct pktgen_hdr *pgh;
2572
2573 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
2574 datalen -= sizeof(*pgh);
2575
2576 if (pkt_dev->nfrags <= 0) {
2577 memset(skb_put(skb, datalen), 0, datalen);
2578 } else {
2579 int frags = pkt_dev->nfrags;
2580 int i, len;
2581 int frag_len;
2582
2583
2584 if (frags > MAX_SKB_FRAGS)
2585 frags = MAX_SKB_FRAGS;
2586 len = datalen - frags * PAGE_SIZE;
2587 if (len > 0) {
2588 memset(skb_put(skb, len), 0, len);
2589 datalen = frags * PAGE_SIZE;
2590 }
2591
2592 i = 0;
2593 frag_len = (datalen/frags) < PAGE_SIZE ?
2594 (datalen/frags) : PAGE_SIZE;
2595 while (datalen > 0) {
2596 if (unlikely(!pkt_dev->page)) {
2597 int node = numa_node_id();
2598
2599 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2600 node = pkt_dev->node;
2601 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2602 if (!pkt_dev->page)
2603 break;
2604 }
2605 get_page(pkt_dev->page);
2606 skb_frag_set_page(skb, i, pkt_dev->page);
2607 skb_shinfo(skb)->frags[i].page_offset = 0;
2608 /*last fragment, fill rest of data*/
2609 if (i == (frags - 1))
2610 skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2611 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2612 else
2613 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2614 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2615 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2616 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2617 i++;
2618 skb_shinfo(skb)->nr_frags = i;
2619 }
2620 }
2621
2622 /* Stamp the time, and sequence number,
2623 * convert them to network byte order
2624 */
2625 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2626 pgh->seq_num = htonl(pkt_dev->seq_num);
2627
2628 do_gettimeofday(&timestamp);
2629 pgh->tv_sec = htonl(timestamp.tv_sec);
2630 pgh->tv_usec = htonl(timestamp.tv_usec);
2631 }
2632
2633 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2634 struct pktgen_dev *pkt_dev)
2635 {
2636 struct sk_buff *skb = NULL;
2637 __u8 *eth;
2638 struct udphdr *udph;
2639 int datalen, iplen;
2640 struct iphdr *iph;
2641 __be16 protocol = htons(ETH_P_IP);
2642 __be32 *mpls;
2643 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2644 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2645 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2646 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2647 u16 queue_map;
2648
2649 if (pkt_dev->nr_labels)
2650 protocol = htons(ETH_P_MPLS_UC);
2651
2652 if (pkt_dev->vlan_id != 0xffff)
2653 protocol = htons(ETH_P_8021Q);
2654
2655 /* Update any of the values, used when we're incrementing various
2656 * fields.
2657 */
2658 mod_cur_headers(pkt_dev);
2659 queue_map = pkt_dev->cur_queue_map;
2660
2661 datalen = (odev->hard_header_len + 16) & ~0xf;
2662
2663 if (pkt_dev->flags & F_NODE) {
2664 int node;
2665
2666 if (pkt_dev->node >= 0)
2667 node = pkt_dev->node;
2668 else
2669 node = numa_node_id();
2670
2671 skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64
2672 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node);
2673 if (likely(skb)) {
2674 skb_reserve(skb, NET_SKB_PAD);
2675 skb->dev = odev;
2676 }
2677 }
2678 else
2679 skb = __netdev_alloc_skb(odev,
2680 pkt_dev->cur_pkt_size + 64
2681 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2682
2683 if (!skb) {
2684 sprintf(pkt_dev->result, "No memory");
2685 return NULL;
2686 }
2687 prefetchw(skb->data);
2688
2689 skb_reserve(skb, datalen);
2690
2691 /* Reserve for ethernet and IP header */
2692 eth = (__u8 *) skb_push(skb, 14);
2693 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2694 if (pkt_dev->nr_labels)
2695 mpls_push(mpls, pkt_dev);
2696
2697 if (pkt_dev->vlan_id != 0xffff) {
2698 if (pkt_dev->svlan_id != 0xffff) {
2699 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2700 *svlan_tci = build_tci(pkt_dev->svlan_id,
2701 pkt_dev->svlan_cfi,
2702 pkt_dev->svlan_p);
2703 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2704 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2705 }
2706 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2707 *vlan_tci = build_tci(pkt_dev->vlan_id,
2708 pkt_dev->vlan_cfi,
2709 pkt_dev->vlan_p);
2710 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2711 *vlan_encapsulated_proto = htons(ETH_P_IP);
2712 }
2713
2714 skb->network_header = skb->tail;
2715 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2716 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2717 skb_set_queue_mapping(skb, queue_map);
2718 skb->priority = pkt_dev->skb_priority;
2719
2720 iph = ip_hdr(skb);
2721 udph = udp_hdr(skb);
2722
2723 memcpy(eth, pkt_dev->hh, 12);
2724 *(__be16 *) & eth[12] = protocol;
2725
2726 /* Eth + IPh + UDPh + mpls */
2727 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2728 pkt_dev->pkt_overhead;
2729 if (datalen < sizeof(struct pktgen_hdr))
2730 datalen = sizeof(struct pktgen_hdr);
2731
2732 udph->source = htons(pkt_dev->cur_udp_src);
2733 udph->dest = htons(pkt_dev->cur_udp_dst);
2734 udph->len = htons(datalen + 8); /* DATA + udphdr */
2735 udph->check = 0; /* No checksum */
2736
2737 iph->ihl = 5;
2738 iph->version = 4;
2739 iph->ttl = 32;
2740 iph->tos = pkt_dev->tos;
2741 iph->protocol = IPPROTO_UDP; /* UDP */
2742 iph->saddr = pkt_dev->cur_saddr;
2743 iph->daddr = pkt_dev->cur_daddr;
2744 iph->id = htons(pkt_dev->ip_id);
2745 pkt_dev->ip_id++;
2746 iph->frag_off = 0;
2747 iplen = 20 + 8 + datalen;
2748 iph->tot_len = htons(iplen);
2749 iph->check = 0;
2750 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2751 skb->protocol = protocol;
2752 skb->mac_header = (skb->network_header - ETH_HLEN -
2753 pkt_dev->pkt_overhead);
2754 skb->dev = odev;
2755 skb->pkt_type = PACKET_HOST;
2756 pktgen_finalize_skb(pkt_dev, skb, datalen);
2757
2758 #ifdef CONFIG_XFRM
2759 if (!process_ipsec(pkt_dev, skb, protocol))
2760 return NULL;
2761 #endif
2762
2763 return skb;
2764 }
2765
2766 /*
2767 * scan_ip6, fmt_ip taken from dietlibc-0.21
2768 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2769 *
2770 * Slightly modified for kernel.
2771 * Should be candidate for net/ipv4/utils.c
2772 * --ro
2773 */
2774
2775 static unsigned int scan_ip6(const char *s, char ip[16])
2776 {
2777 unsigned int i;
2778 unsigned int len = 0;
2779 unsigned long u;
2780 char suffix[16];
2781 unsigned int prefixlen = 0;
2782 unsigned int suffixlen = 0;
2783 __be32 tmp;
2784 char *pos;
2785
2786 for (i = 0; i < 16; i++)
2787 ip[i] = 0;
2788
2789 for (;;) {
2790 if (*s == ':') {
2791 len++;
2792 if (s[1] == ':') { /* Found "::", skip to part 2 */
2793 s += 2;
2794 len++;
2795 break;
2796 }
2797 s++;
2798 }
2799
2800 u = simple_strtoul(s, &pos, 16);
2801 i = pos - s;
2802 if (!i)
2803 return 0;
2804 if (prefixlen == 12 && s[i] == '.') {
2805
2806 /* the last 4 bytes may be written as IPv4 address */
2807
2808 tmp = in_aton(s);
2809 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2810 return i + len;
2811 }
2812 ip[prefixlen++] = (u >> 8);
2813 ip[prefixlen++] = (u & 255);
2814 s += i;
2815 len += i;
2816 if (prefixlen == 16)
2817 return len;
2818 }
2819
2820 /* part 2, after "::" */
2821 for (;;) {
2822 if (*s == ':') {
2823 if (suffixlen == 0)
2824 break;
2825 s++;
2826 len++;
2827 } else if (suffixlen != 0)
2828 break;
2829
2830 u = simple_strtol(s, &pos, 16);
2831 i = pos - s;
2832 if (!i) {
2833 if (*s)
2834 len--;
2835 break;
2836 }
2837 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2838 tmp = in_aton(s);
2839 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2840 sizeof(tmp));
2841 suffixlen += 4;
2842 len += strlen(s);
2843 break;
2844 }
2845 suffix[suffixlen++] = (u >> 8);
2846 suffix[suffixlen++] = (u & 255);
2847 s += i;
2848 len += i;
2849 if (prefixlen + suffixlen == 16)
2850 break;
2851 }
2852 for (i = 0; i < suffixlen; i++)
2853 ip[16 - suffixlen + i] = suffix[i];
2854 return len;
2855 }
2856
2857 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2858 struct pktgen_dev *pkt_dev)
2859 {
2860 struct sk_buff *skb = NULL;
2861 __u8 *eth;
2862 struct udphdr *udph;
2863 int datalen;
2864 struct ipv6hdr *iph;
2865 __be16 protocol = htons(ETH_P_IPV6);
2866 __be32 *mpls;
2867 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2868 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2869 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2870 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2871 u16 queue_map;
2872
2873 if (pkt_dev->nr_labels)
2874 protocol = htons(ETH_P_MPLS_UC);
2875
2876 if (pkt_dev->vlan_id != 0xffff)
2877 protocol = htons(ETH_P_8021Q);
2878
2879 /* Update any of the values, used when we're incrementing various
2880 * fields.
2881 */
2882 mod_cur_headers(pkt_dev);
2883 queue_map = pkt_dev->cur_queue_map;
2884
2885 skb = __netdev_alloc_skb(odev,
2886 pkt_dev->cur_pkt_size + 64
2887 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
2888 if (!skb) {
2889 sprintf(pkt_dev->result, "No memory");
2890 return NULL;
2891 }
2892 prefetchw(skb->data);
2893
2894 skb_reserve(skb, 16);
2895
2896 /* Reserve for ethernet and IP header */
2897 eth = (__u8 *) skb_push(skb, 14);
2898 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2899 if (pkt_dev->nr_labels)
2900 mpls_push(mpls, pkt_dev);
2901
2902 if (pkt_dev->vlan_id != 0xffff) {
2903 if (pkt_dev->svlan_id != 0xffff) {
2904 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2905 *svlan_tci = build_tci(pkt_dev->svlan_id,
2906 pkt_dev->svlan_cfi,
2907 pkt_dev->svlan_p);
2908 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2909 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2910 }
2911 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2912 *vlan_tci = build_tci(pkt_dev->vlan_id,
2913 pkt_dev->vlan_cfi,
2914 pkt_dev->vlan_p);
2915 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2916 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2917 }
2918
2919 skb->network_header = skb->tail;
2920 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2921 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2922 skb_set_queue_mapping(skb, queue_map);
2923 skb->priority = pkt_dev->skb_priority;
2924 iph = ipv6_hdr(skb);
2925 udph = udp_hdr(skb);
2926
2927 memcpy(eth, pkt_dev->hh, 12);
2928 *(__be16 *) &eth[12] = protocol;
2929
2930 /* Eth + IPh + UDPh + mpls */
2931 datalen = pkt_dev->cur_pkt_size - 14 -
2932 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2933 pkt_dev->pkt_overhead;
2934
2935 if (datalen < sizeof(struct pktgen_hdr)) {
2936 datalen = sizeof(struct pktgen_hdr);
2937 if (net_ratelimit())
2938 pr_info("increased datalen to %d\n", datalen);
2939 }
2940
2941 udph->source = htons(pkt_dev->cur_udp_src);
2942 udph->dest = htons(pkt_dev->cur_udp_dst);
2943 udph->len = htons(datalen + sizeof(struct udphdr));
2944 udph->check = 0; /* No checksum */
2945
2946 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2947
2948 if (pkt_dev->traffic_class) {
2949 /* Version + traffic class + flow (0) */
2950 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2951 }
2952
2953 iph->hop_limit = 32;
2954
2955 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2956 iph->nexthdr = IPPROTO_UDP;
2957
2958 iph->daddr = pkt_dev->cur_in6_daddr;
2959 iph->saddr = pkt_dev->cur_in6_saddr;
2960
2961 skb->mac_header = (skb->network_header - ETH_HLEN -
2962 pkt_dev->pkt_overhead);
2963 skb->protocol = protocol;
2964 skb->dev = odev;
2965 skb->pkt_type = PACKET_HOST;
2966
2967 pktgen_finalize_skb(pkt_dev, skb, datalen);
2968
2969 return skb;
2970 }
2971
2972 static struct sk_buff *fill_packet(struct net_device *odev,
2973 struct pktgen_dev *pkt_dev)
2974 {
2975 if (pkt_dev->flags & F_IPV6)
2976 return fill_packet_ipv6(odev, pkt_dev);
2977 else
2978 return fill_packet_ipv4(odev, pkt_dev);
2979 }
2980
2981 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2982 {
2983 pkt_dev->seq_num = 1;
2984 pkt_dev->idle_acc = 0;
2985 pkt_dev->sofar = 0;
2986 pkt_dev->tx_bytes = 0;
2987 pkt_dev->errors = 0;
2988 }
2989
2990 /* Set up structure for sending pkts, clear counters */
2991
2992 static void pktgen_run(struct pktgen_thread *t)
2993 {
2994 struct pktgen_dev *pkt_dev;
2995 int started = 0;
2996
2997 func_enter();
2998
2999 if_lock(t);
3000 list_for_each_entry(pkt_dev, &t->if_list, list) {
3001
3002 /*
3003 * setup odev and create initial packet.
3004 */
3005 pktgen_setup_inject(pkt_dev);
3006
3007 if (pkt_dev->odev) {
3008 pktgen_clear_counters(pkt_dev);
3009 pkt_dev->running = 1; /* Cranke yeself! */
3010 pkt_dev->skb = NULL;
3011 pkt_dev->started_at =
3012 pkt_dev->next_tx = ktime_now();
3013
3014 set_pkt_overhead(pkt_dev);
3015
3016 strcpy(pkt_dev->result, "Starting");
3017 started++;
3018 } else
3019 strcpy(pkt_dev->result, "Error starting");
3020 }
3021 if_unlock(t);
3022 if (started)
3023 t->control &= ~(T_STOP);
3024 }
3025
3026 static void pktgen_stop_all_threads_ifs(void)
3027 {
3028 struct pktgen_thread *t;
3029
3030 func_enter();
3031
3032 mutex_lock(&pktgen_thread_lock);
3033
3034 list_for_each_entry(t, &pktgen_threads, th_list)
3035 t->control |= T_STOP;
3036
3037 mutex_unlock(&pktgen_thread_lock);
3038 }
3039
3040 static int thread_is_running(const struct pktgen_thread *t)
3041 {
3042 const struct pktgen_dev *pkt_dev;
3043
3044 list_for_each_entry(pkt_dev, &t->if_list, list)
3045 if (pkt_dev->running)
3046 return 1;
3047 return 0;
3048 }
3049
3050 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3051 {
3052 if_lock(t);
3053
3054 while (thread_is_running(t)) {
3055
3056 if_unlock(t);
3057
3058 msleep_interruptible(100);
3059
3060 if (signal_pending(current))
3061 goto signal;
3062 if_lock(t);
3063 }
3064 if_unlock(t);
3065 return 1;
3066 signal:
3067 return 0;
3068 }
3069
3070 static int pktgen_wait_all_threads_run(void)
3071 {
3072 struct pktgen_thread *t;
3073 int sig = 1;
3074
3075 mutex_lock(&pktgen_thread_lock);
3076
3077 list_for_each_entry(t, &pktgen_threads, th_list) {
3078 sig = pktgen_wait_thread_run(t);
3079 if (sig == 0)
3080 break;
3081 }
3082
3083 if (sig == 0)
3084 list_for_each_entry(t, &pktgen_threads, th_list)
3085 t->control |= (T_STOP);
3086
3087 mutex_unlock(&pktgen_thread_lock);
3088 return sig;
3089 }
3090
3091 static void pktgen_run_all_threads(void)
3092 {
3093 struct pktgen_thread *t;
3094
3095 func_enter();
3096
3097 mutex_lock(&pktgen_thread_lock);
3098
3099 list_for_each_entry(t, &pktgen_threads, th_list)
3100 t->control |= (T_RUN);
3101
3102 mutex_unlock(&pktgen_thread_lock);
3103
3104 /* Propagate thread->control */
3105 schedule_timeout_interruptible(msecs_to_jiffies(125));
3106
3107 pktgen_wait_all_threads_run();
3108 }
3109
3110 static void pktgen_reset_all_threads(void)
3111 {
3112 struct pktgen_thread *t;
3113
3114 func_enter();
3115
3116 mutex_lock(&pktgen_thread_lock);
3117
3118 list_for_each_entry(t, &pktgen_threads, th_list)
3119 t->control |= (T_REMDEVALL);
3120
3121 mutex_unlock(&pktgen_thread_lock);
3122
3123 /* Propagate thread->control */
3124 schedule_timeout_interruptible(msecs_to_jiffies(125));
3125
3126 pktgen_wait_all_threads_run();
3127 }
3128
3129 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3130 {
3131 __u64 bps, mbps, pps;
3132 char *p = pkt_dev->result;
3133 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3134 pkt_dev->started_at);
3135 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3136
3137 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3138 (unsigned long long)ktime_to_us(elapsed),
3139 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3140 (unsigned long long)ktime_to_us(idle),
3141 (unsigned long long)pkt_dev->sofar,
3142 pkt_dev->cur_pkt_size, nr_frags);
3143
3144 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3145 ktime_to_ns(elapsed));
3146
3147 bps = pps * 8 * pkt_dev->cur_pkt_size;
3148
3149 mbps = bps;
3150 do_div(mbps, 1000000);
3151 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3152 (unsigned long long)pps,
3153 (unsigned long long)mbps,
3154 (unsigned long long)bps,
3155 (unsigned long long)pkt_dev->errors);
3156 }
3157
3158 /* Set stopped-at timer, remove from running list, do counters & statistics */
3159 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3160 {
3161 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3162
3163 if (!pkt_dev->running) {
3164 pr_warning("interface: %s is already stopped\n",
3165 pkt_dev->odevname);
3166 return -EINVAL;
3167 }
3168
3169 kfree_skb(pkt_dev->skb);
3170 pkt_dev->skb = NULL;
3171 pkt_dev->stopped_at = ktime_now();
3172 pkt_dev->running = 0;
3173
3174 show_results(pkt_dev, nr_frags);
3175
3176 return 0;
3177 }
3178
3179 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3180 {
3181 struct pktgen_dev *pkt_dev, *best = NULL;
3182
3183 if_lock(t);
3184
3185 list_for_each_entry(pkt_dev, &t->if_list, list) {
3186 if (!pkt_dev->running)
3187 continue;
3188 if (best == NULL)
3189 best = pkt_dev;
3190 else if (ktime_lt(pkt_dev->next_tx, best->next_tx))
3191 best = pkt_dev;
3192 }
3193 if_unlock(t);
3194 return best;
3195 }
3196
3197 static void pktgen_stop(struct pktgen_thread *t)
3198 {
3199 struct pktgen_dev *pkt_dev;
3200
3201 func_enter();
3202
3203 if_lock(t);
3204
3205 list_for_each_entry(pkt_dev, &t->if_list, list) {
3206 pktgen_stop_device(pkt_dev);
3207 }
3208
3209 if_unlock(t);
3210 }
3211
3212 /*
3213 * one of our devices needs to be removed - find it
3214 * and remove it
3215 */
3216 static void pktgen_rem_one_if(struct pktgen_thread *t)
3217 {
3218 struct list_head *q, *n;
3219 struct pktgen_dev *cur;
3220
3221 func_enter();
3222
3223 if_lock(t);
3224
3225 list_for_each_safe(q, n, &t->if_list) {
3226 cur = list_entry(q, struct pktgen_dev, list);
3227
3228 if (!cur->removal_mark)
3229 continue;
3230
3231 kfree_skb(cur->skb);
3232 cur->skb = NULL;
3233
3234 pktgen_remove_device(t, cur);
3235
3236 break;
3237 }
3238
3239 if_unlock(t);
3240 }
3241
3242 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3243 {
3244 struct list_head *q, *n;
3245 struct pktgen_dev *cur;
3246
3247 func_enter();
3248
3249 /* Remove all devices, free mem */
3250
3251 if_lock(t);
3252
3253 list_for_each_safe(q, n, &t->if_list) {
3254 cur = list_entry(q, struct pktgen_dev, list);
3255
3256 kfree_skb(cur->skb);
3257 cur->skb = NULL;
3258
3259 pktgen_remove_device(t, cur);
3260 }
3261
3262 if_unlock(t);
3263 }
3264
3265 static void pktgen_rem_thread(struct pktgen_thread *t)
3266 {
3267 /* Remove from the thread list */
3268
3269 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3270
3271 }
3272
3273 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3274 {
3275 ktime_t idle_start = ktime_now();
3276 schedule();
3277 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3278 }
3279
3280 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3281 {
3282 ktime_t idle_start = ktime_now();
3283
3284 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3285 if (signal_pending(current))
3286 break;
3287
3288 if (need_resched())
3289 pktgen_resched(pkt_dev);
3290 else
3291 cpu_relax();
3292 }
3293 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3294 }
3295
3296 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3297 {
3298 struct net_device *odev = pkt_dev->odev;
3299 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3300 = odev->netdev_ops->ndo_start_xmit;
3301 struct netdev_queue *txq;
3302 u16 queue_map;
3303 int ret;
3304
3305 /* If device is offline, then don't send */
3306 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3307 pktgen_stop_device(pkt_dev);
3308 return;
3309 }
3310
3311 /* This is max DELAY, this has special meaning of
3312 * "never transmit"
3313 */
3314 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3315 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX);
3316 return;
3317 }
3318
3319 /* If no skb or clone count exhausted then get new one */
3320 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3321 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3322 /* build a new pkt */
3323 kfree_skb(pkt_dev->skb);
3324
3325 pkt_dev->skb = fill_packet(odev, pkt_dev);
3326 if (pkt_dev->skb == NULL) {
3327 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3328 schedule();
3329 pkt_dev->clone_count--; /* back out increment, OOM */
3330 return;
3331 }
3332 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3333 pkt_dev->allocated_skbs++;
3334 pkt_dev->clone_count = 0; /* reset counter */
3335 }
3336
3337 if (pkt_dev->delay && pkt_dev->last_ok)
3338 spin(pkt_dev, pkt_dev->next_tx);
3339
3340 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3341 txq = netdev_get_tx_queue(odev, queue_map);
3342
3343 __netif_tx_lock_bh(txq);
3344
3345 if (unlikely(netif_xmit_frozen_or_stopped(txq))) {
3346 ret = NETDEV_TX_BUSY;
3347 pkt_dev->last_ok = 0;
3348 goto unlock;
3349 }
3350 atomic_inc(&(pkt_dev->skb->users));
3351 ret = (*xmit)(pkt_dev->skb, odev);
3352
3353 switch (ret) {
3354 case NETDEV_TX_OK:
3355 txq_trans_update(txq);
3356 pkt_dev->last_ok = 1;
3357 pkt_dev->sofar++;
3358 pkt_dev->seq_num++;
3359 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3360 break;
3361 case NET_XMIT_DROP:
3362 case NET_XMIT_CN:
3363 case NET_XMIT_POLICED:
3364 /* skb has been consumed */
3365 pkt_dev->errors++;
3366 break;
3367 default: /* Drivers are not supposed to return other values! */
3368 if (net_ratelimit())
3369 pr_info("%s xmit error: %d\n", pkt_dev->odevname, ret);
3370 pkt_dev->errors++;
3371 /* fallthru */
3372 case NETDEV_TX_LOCKED:
3373 case NETDEV_TX_BUSY:
3374 /* Retry it next time */
3375 atomic_dec(&(pkt_dev->skb->users));
3376 pkt_dev->last_ok = 0;
3377 }
3378 unlock:
3379 __netif_tx_unlock_bh(txq);
3380
3381 /* If pkt_dev->count is zero, then run forever */
3382 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3383 pktgen_wait_for_skb(pkt_dev);
3384
3385 /* Done with this */
3386 pktgen_stop_device(pkt_dev);
3387 }
3388 }
3389
3390 /*
3391 * Main loop of the thread goes here
3392 */
3393
3394 static int pktgen_thread_worker(void *arg)
3395 {
3396 DEFINE_WAIT(wait);
3397 struct pktgen_thread *t = arg;
3398 struct pktgen_dev *pkt_dev = NULL;
3399 int cpu = t->cpu;
3400
3401 BUG_ON(smp_processor_id() != cpu);
3402
3403 init_waitqueue_head(&t->queue);
3404 complete(&t->start_done);
3405
3406 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3407
3408 set_current_state(TASK_INTERRUPTIBLE);
3409
3410 set_freezable();
3411
3412 while (!kthread_should_stop()) {
3413 pkt_dev = next_to_run(t);
3414
3415 if (unlikely(!pkt_dev && t->control == 0)) {
3416 if (pktgen_exiting)
3417 break;
3418 wait_event_interruptible_timeout(t->queue,
3419 t->control != 0,
3420 HZ/10);
3421 try_to_freeze();
3422 continue;
3423 }
3424
3425 __set_current_state(TASK_RUNNING);
3426
3427 if (likely(pkt_dev)) {
3428 pktgen_xmit(pkt_dev);
3429
3430 if (need_resched())
3431 pktgen_resched(pkt_dev);
3432 else
3433 cpu_relax();
3434 }
3435
3436 if (t->control & T_STOP) {
3437 pktgen_stop(t);
3438 t->control &= ~(T_STOP);
3439 }
3440
3441 if (t->control & T_RUN) {
3442 pktgen_run(t);
3443 t->control &= ~(T_RUN);
3444 }
3445
3446 if (t->control & T_REMDEVALL) {
3447 pktgen_rem_all_ifs(t);
3448 t->control &= ~(T_REMDEVALL);
3449 }
3450
3451 if (t->control & T_REMDEV) {
3452 pktgen_rem_one_if(t);
3453 t->control &= ~(T_REMDEV);
3454 }
3455
3456 try_to_freeze();
3457
3458 set_current_state(TASK_INTERRUPTIBLE);
3459 }
3460
3461 pr_debug("%s stopping all device\n", t->tsk->comm);
3462 pktgen_stop(t);
3463
3464 pr_debug("%s removing all device\n", t->tsk->comm);
3465 pktgen_rem_all_ifs(t);
3466
3467 pr_debug("%s removing thread\n", t->tsk->comm);
3468 pktgen_rem_thread(t);
3469
3470 /* Wait for kthread_stop */
3471 while (!kthread_should_stop()) {
3472 set_current_state(TASK_INTERRUPTIBLE);
3473 schedule();
3474 }
3475 __set_current_state(TASK_RUNNING);
3476
3477 return 0;
3478 }
3479
3480 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3481 const char *ifname, bool exact)
3482 {
3483 struct pktgen_dev *p, *pkt_dev = NULL;
3484 size_t len = strlen(ifname);
3485
3486 if_lock(t);
3487 list_for_each_entry(p, &t->if_list, list)
3488 if (strncmp(p->odevname, ifname, len) == 0) {
3489 if (p->odevname[len]) {
3490 if (exact || p->odevname[len] != '@')
3491 continue;
3492 }
3493 pkt_dev = p;
3494 break;
3495 }
3496
3497 if_unlock(t);
3498 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3499 return pkt_dev;
3500 }
3501
3502 /*
3503 * Adds a dev at front of if_list.
3504 */
3505
3506 static int add_dev_to_thread(struct pktgen_thread *t,
3507 struct pktgen_dev *pkt_dev)
3508 {
3509 int rv = 0;
3510
3511 if_lock(t);
3512
3513 if (pkt_dev->pg_thread) {
3514 pr_err("ERROR: already assigned to a thread\n");
3515 rv = -EBUSY;
3516 goto out;
3517 }
3518
3519 list_add(&pkt_dev->list, &t->if_list);
3520 pkt_dev->pg_thread = t;
3521 pkt_dev->running = 0;
3522
3523 out:
3524 if_unlock(t);
3525 return rv;
3526 }
3527
3528 /* Called under thread lock */
3529
3530 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3531 {
3532 struct pktgen_dev *pkt_dev;
3533 int err;
3534 int node = cpu_to_node(t->cpu);
3535
3536 /* We don't allow a device to be on several threads */
3537
3538 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3539 if (pkt_dev) {
3540 pr_err("ERROR: interface already used\n");
3541 return -EBUSY;
3542 }
3543
3544 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3545 if (!pkt_dev)
3546 return -ENOMEM;
3547
3548 strcpy(pkt_dev->odevname, ifname);
3549 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3550 node);
3551 if (pkt_dev->flows == NULL) {
3552 kfree(pkt_dev);
3553 return -ENOMEM;
3554 }
3555
3556 pkt_dev->removal_mark = 0;
3557 pkt_dev->min_pkt_size = ETH_ZLEN;
3558 pkt_dev->max_pkt_size = ETH_ZLEN;
3559 pkt_dev->nfrags = 0;
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 pkt_dev->vlan_p = 0;
3568 pkt_dev->vlan_cfi = 0;
3569 pkt_dev->vlan_id = 0xffff;
3570 pkt_dev->svlan_p = 0;
3571 pkt_dev->svlan_cfi = 0;
3572 pkt_dev->svlan_id = 0xffff;
3573 pkt_dev->node = -1;
3574
3575 err = pktgen_setup_dev(pkt_dev, ifname);
3576 if (err)
3577 goto out1;
3578 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3579 pkt_dev->clone_skb = pg_clone_skb_d;
3580
3581 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3582 &pktgen_if_fops, pkt_dev);
3583 if (!pkt_dev->entry) {
3584 pr_err("cannot create %s/%s procfs entry\n",
3585 PG_PROC_DIR, ifname);
3586 err = -EINVAL;
3587 goto out2;
3588 }
3589 #ifdef CONFIG_XFRM
3590 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3591 pkt_dev->ipsproto = IPPROTO_ESP;
3592 #endif
3593
3594 return add_dev_to_thread(t, pkt_dev);
3595 out2:
3596 dev_put(pkt_dev->odev);
3597 out1:
3598 #ifdef CONFIG_XFRM
3599 free_SAs(pkt_dev);
3600 #endif
3601 vfree(pkt_dev->flows);
3602 kfree(pkt_dev);
3603 return err;
3604 }
3605
3606 static int __init pktgen_create_thread(int cpu)
3607 {
3608 struct pktgen_thread *t;
3609 struct proc_dir_entry *pe;
3610 struct task_struct *p;
3611
3612 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3613 cpu_to_node(cpu));
3614 if (!t) {
3615 pr_err("ERROR: out of memory, can't create new thread\n");
3616 return -ENOMEM;
3617 }
3618
3619 spin_lock_init(&t->if_lock);
3620 t->cpu = cpu;
3621
3622 INIT_LIST_HEAD(&t->if_list);
3623
3624 list_add_tail(&t->th_list, &pktgen_threads);
3625 init_completion(&t->start_done);
3626
3627 p = kthread_create_on_node(pktgen_thread_worker,
3628 t,
3629 cpu_to_node(cpu),
3630 "kpktgend_%d", cpu);
3631 if (IS_ERR(p)) {
3632 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3633 list_del(&t->th_list);
3634 kfree(t);
3635 return PTR_ERR(p);
3636 }
3637 kthread_bind(p, cpu);
3638 t->tsk = p;
3639
3640 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3641 &pktgen_thread_fops, t);
3642 if (!pe) {
3643 pr_err("cannot create %s/%s procfs entry\n",
3644 PG_PROC_DIR, t->tsk->comm);
3645 kthread_stop(p);
3646 list_del(&t->th_list);
3647 kfree(t);
3648 return -EINVAL;
3649 }
3650
3651 wake_up_process(p);
3652 wait_for_completion(&t->start_done);
3653
3654 return 0;
3655 }
3656
3657 /*
3658 * Removes a device from the thread if_list.
3659 */
3660 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3661 struct pktgen_dev *pkt_dev)
3662 {
3663 struct list_head *q, *n;
3664 struct pktgen_dev *p;
3665
3666 list_for_each_safe(q, n, &t->if_list) {
3667 p = list_entry(q, struct pktgen_dev, list);
3668 if (p == pkt_dev)
3669 list_del(&p->list);
3670 }
3671 }
3672
3673 static int pktgen_remove_device(struct pktgen_thread *t,
3674 struct pktgen_dev *pkt_dev)
3675 {
3676
3677 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3678
3679 if (pkt_dev->running) {
3680 pr_warning("WARNING: trying to remove a running interface, stopping it now\n");
3681 pktgen_stop_device(pkt_dev);
3682 }
3683
3684 /* Dis-associate from the interface */
3685
3686 if (pkt_dev->odev) {
3687 dev_put(pkt_dev->odev);
3688 pkt_dev->odev = NULL;
3689 }
3690
3691 /* And update the thread if_list */
3692
3693 _rem_dev_from_if_list(t, pkt_dev);
3694
3695 if (pkt_dev->entry)
3696 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3697
3698 #ifdef CONFIG_XFRM
3699 free_SAs(pkt_dev);
3700 #endif
3701 vfree(pkt_dev->flows);
3702 if (pkt_dev->page)
3703 put_page(pkt_dev->page);
3704 kfree(pkt_dev);
3705 return 0;
3706 }
3707
3708 static int __init pg_init(void)
3709 {
3710 int cpu;
3711 struct proc_dir_entry *pe;
3712 int ret = 0;
3713
3714 pr_info("%s", version);
3715
3716 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3717 if (!pg_proc_dir)
3718 return -ENODEV;
3719
3720 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3721 if (pe == NULL) {
3722 pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL);
3723 ret = -EINVAL;
3724 goto remove_dir;
3725 }
3726
3727 register_netdevice_notifier(&pktgen_notifier_block);
3728
3729 for_each_online_cpu(cpu) {
3730 int err;
3731
3732 err = pktgen_create_thread(cpu);
3733 if (err)
3734 pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n",
3735 cpu, err);
3736 }
3737
3738 if (list_empty(&pktgen_threads)) {
3739 pr_err("ERROR: Initialization failed for all threads\n");
3740 ret = -ENODEV;
3741 goto unregister;
3742 }
3743
3744 return 0;
3745
3746 unregister:
3747 unregister_netdevice_notifier(&pktgen_notifier_block);
3748 remove_proc_entry(PGCTRL, pg_proc_dir);
3749 remove_dir:
3750 proc_net_remove(&init_net, PG_PROC_DIR);
3751 return ret;
3752 }
3753
3754 static void __exit pg_cleanup(void)
3755 {
3756 struct pktgen_thread *t;
3757 struct list_head *q, *n;
3758
3759 /* Stop all interfaces & threads */
3760 pktgen_exiting = true;
3761
3762 list_for_each_safe(q, n, &pktgen_threads) {
3763 t = list_entry(q, struct pktgen_thread, th_list);
3764 kthread_stop(t->tsk);
3765 kfree(t);
3766 }
3767
3768 /* Un-register us from receiving netdevice events */
3769 unregister_netdevice_notifier(&pktgen_notifier_block);
3770
3771 /* Clean up proc file system */
3772 remove_proc_entry(PGCTRL, pg_proc_dir);
3773 proc_net_remove(&init_net, PG_PROC_DIR);
3774 }
3775
3776 module_init(pg_init);
3777 module_exit(pg_cleanup);
3778
3779 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3780 MODULE_DESCRIPTION("Packet Generator tool");
3781 MODULE_LICENSE("GPL");
3782 MODULE_VERSION(VERSION);
3783 module_param(pg_count_d, int, 0);
3784 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3785 module_param(pg_delay_d, int, 0);
3786 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3787 module_param(pg_clone_skb_d, int, 0);
3788 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3789 module_param(debug, int, 0);
3790 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");