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Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
[mirror_ubuntu-artful-kernel.git] / net / core / pktgen.c
1 /*
2 * Authors:
3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
4 * Uppsala University and
5 * Swedish University of Agricultural Sciences
6 *
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 * Ben Greear <greearb@candelatech.com>
9 * Jens Låås <jens.laas@data.slu.se>
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 *
16 *
17 * A tool for loading the network with preconfigurated packets.
18 * The tool is implemented as a linux module. Parameters are output
19 * device, delay (to hard_xmit), number of packets, and whether
20 * to use multiple SKBs or just the same one.
21 * pktgen uses the installed interface's output routine.
22 *
23 * Additional hacking by:
24 *
25 * Jens.Laas@data.slu.se
26 * Improved by ANK. 010120.
27 * Improved by ANK even more. 010212.
28 * MAC address typo fixed. 010417 --ro
29 * Integrated. 020301 --DaveM
30 * Added multiskb option 020301 --DaveM
31 * Scaling of results. 020417--sigurdur@linpro.no
32 * Significant re-work of the module:
33 * * Convert to threaded model to more efficiently be able to transmit
34 * and receive on multiple interfaces at once.
35 * * Converted many counters to __u64 to allow longer runs.
36 * * Allow configuration of ranges, like min/max IP address, MACs,
37 * and UDP-ports, for both source and destination, and can
38 * set to use a random distribution or sequentially walk the range.
39 * * Can now change most values after starting.
40 * * Place 12-byte packet in UDP payload with magic number,
41 * sequence number, and timestamp.
42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and
43 * latencies (with micro-second) precision.
44 * * Add IOCTL interface to easily get counters & configuration.
45 * --Ben Greear <greearb@candelatech.com>
46 *
47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
49 * as a "fastpath" with a configurable number of clones after alloc's.
50 * clone_skb=0 means all packets are allocated this also means ranges time
51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
52 * clones.
53 *
54 * Also moved to /proc/net/pktgen/
55 * --ro
56 *
57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
58 * mistakes. Also merged in DaveM's patch in the -pre6 patch.
59 * --Ben Greear <greearb@candelatech.com>
60 *
61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
62 *
63 *
64 * 021124 Finished major redesign and rewrite for new functionality.
65 * See Documentation/networking/pktgen.txt for how to use this.
66 *
67 * The new operation:
68 * For each CPU one thread/process is created at start. This process checks
69 * for running devices in the if_list and sends packets until count is 0 it
70 * also the thread checks the thread->control which is used for inter-process
71 * communication. controlling process "posts" operations to the threads this
72 * way. The if_lock should be possible to remove when add/rem_device is merged
73 * into this too.
74 *
75 * By design there should only be *one* "controlling" process. In practice
76 * multiple write accesses gives unpredictable result. Understood by "write"
77 * to /proc gives result code thats should be read be the "writer".
78 * For practical use this should be no problem.
79 *
80 * Note when adding devices to a specific CPU there good idea to also assign
81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
82 * --ro
83 *
84 * Fix refcount off by one if first packet fails, potential null deref,
85 * memleak 030710- KJP
86 *
87 * First "ranges" functionality for ipv6 030726 --ro
88 *
89 * Included flow support. 030802 ANK.
90 *
91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
92 *
93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
95 *
96 * New xmit() return, do_div and misc clean up by Stephen Hemminger
97 * <shemminger@osdl.org> 040923
98 *
99 * Randy Dunlap fixed u64 printk compiler waring
100 *
101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
103 *
104 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
106 *
107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
108 * 050103
109 *
110 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
111 *
112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
113 *
114 * Fixed src_mac command to set source mac of packet to value specified in
115 * command by Adit Ranadive <adit.262@gmail.com>
116 *
117 */
118
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 static unsigned int fmt_ip6(char *s, const char ip[16]);
454
455 /* Module parameters, defaults. */
456 static int pg_count_d __read_mostly = 1000;
457 static int pg_delay_d __read_mostly;
458 static int pg_clone_skb_d __read_mostly;
459 static int debug __read_mostly;
460
461 static DEFINE_MUTEX(pktgen_thread_lock);
462 static LIST_HEAD(pktgen_threads);
463
464 static struct notifier_block pktgen_notifier_block = {
465 .notifier_call = pktgen_device_event,
466 };
467
468 /*
469 * /proc handling functions
470 *
471 */
472
473 static int pgctrl_show(struct seq_file *seq, void *v)
474 {
475 seq_puts(seq, version);
476 return 0;
477 }
478
479 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
480 size_t count, loff_t *ppos)
481 {
482 int err = 0;
483 char data[128];
484
485 if (!capable(CAP_NET_ADMIN)) {
486 err = -EPERM;
487 goto out;
488 }
489
490 if (count > sizeof(data))
491 count = sizeof(data);
492
493 if (copy_from_user(data, buf, count)) {
494 err = -EFAULT;
495 goto out;
496 }
497 data[count - 1] = 0; /* Make string */
498
499 if (!strcmp(data, "stop"))
500 pktgen_stop_all_threads_ifs();
501
502 else if (!strcmp(data, "start"))
503 pktgen_run_all_threads();
504
505 else if (!strcmp(data, "reset"))
506 pktgen_reset_all_threads();
507
508 else
509 pr_warning("Unknown command: %s\n", data);
510
511 err = count;
512
513 out:
514 return err;
515 }
516
517 static int pgctrl_open(struct inode *inode, struct file *file)
518 {
519 return single_open(file, pgctrl_show, PDE(inode)->data);
520 }
521
522 static const struct file_operations pktgen_fops = {
523 .owner = THIS_MODULE,
524 .open = pgctrl_open,
525 .read = seq_read,
526 .llseek = seq_lseek,
527 .write = pgctrl_write,
528 .release = single_release,
529 };
530
531 static int pktgen_if_show(struct seq_file *seq, void *v)
532 {
533 const struct pktgen_dev *pkt_dev = seq->private;
534 ktime_t stopped;
535 u64 idle;
536
537 seq_printf(seq,
538 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
539 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
540 pkt_dev->max_pkt_size);
541
542 seq_printf(seq,
543 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
544 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
545 pkt_dev->clone_skb, pkt_dev->odevname);
546
547 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
548 pkt_dev->lflow);
549
550 seq_printf(seq,
551 " queue_map_min: %u queue_map_max: %u\n",
552 pkt_dev->queue_map_min,
553 pkt_dev->queue_map_max);
554
555 if (pkt_dev->skb_priority)
556 seq_printf(seq, " skb_priority: %u\n",
557 pkt_dev->skb_priority);
558
559 if (pkt_dev->flags & F_IPV6) {
560 char b1[128], b2[128], b3[128];
561 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
562 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
563 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
564 seq_printf(seq,
565 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
566 b2, b3);
567
568 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
569 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
570 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
571 seq_printf(seq,
572 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
573 b2, b3);
574
575 } else {
576 seq_printf(seq,
577 " dst_min: %s dst_max: %s\n",
578 pkt_dev->dst_min, pkt_dev->dst_max);
579 seq_printf(seq,
580 " src_min: %s src_max: %s\n",
581 pkt_dev->src_min, pkt_dev->src_max);
582 }
583
584 seq_puts(seq, " src_mac: ");
585
586 seq_printf(seq, "%pM ",
587 is_zero_ether_addr(pkt_dev->src_mac) ?
588 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
589
590 seq_printf(seq, "dst_mac: ");
591 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
592
593 seq_printf(seq,
594 " udp_src_min: %d udp_src_max: %d"
595 " udp_dst_min: %d udp_dst_max: %d\n",
596 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
597 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
598
599 seq_printf(seq,
600 " src_mac_count: %d dst_mac_count: %d\n",
601 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
602
603 if (pkt_dev->nr_labels) {
604 unsigned i;
605 seq_printf(seq, " mpls: ");
606 for (i = 0; i < pkt_dev->nr_labels; i++)
607 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
608 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
609 }
610
611 if (pkt_dev->vlan_id != 0xffff)
612 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
613 pkt_dev->vlan_id, pkt_dev->vlan_p,
614 pkt_dev->vlan_cfi);
615
616 if (pkt_dev->svlan_id != 0xffff)
617 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
618 pkt_dev->svlan_id, pkt_dev->svlan_p,
619 pkt_dev->svlan_cfi);
620
621 if (pkt_dev->tos)
622 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
623
624 if (pkt_dev->traffic_class)
625 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
626
627 if (pkt_dev->node >= 0)
628 seq_printf(seq, " node: %d\n", pkt_dev->node);
629
630 seq_printf(seq, " Flags: ");
631
632 if (pkt_dev->flags & F_IPV6)
633 seq_printf(seq, "IPV6 ");
634
635 if (pkt_dev->flags & F_IPSRC_RND)
636 seq_printf(seq, "IPSRC_RND ");
637
638 if (pkt_dev->flags & F_IPDST_RND)
639 seq_printf(seq, "IPDST_RND ");
640
641 if (pkt_dev->flags & F_TXSIZE_RND)
642 seq_printf(seq, "TXSIZE_RND ");
643
644 if (pkt_dev->flags & F_UDPSRC_RND)
645 seq_printf(seq, "UDPSRC_RND ");
646
647 if (pkt_dev->flags & F_UDPDST_RND)
648 seq_printf(seq, "UDPDST_RND ");
649
650 if (pkt_dev->flags & F_MPLS_RND)
651 seq_printf(seq, "MPLS_RND ");
652
653 if (pkt_dev->flags & F_QUEUE_MAP_RND)
654 seq_printf(seq, "QUEUE_MAP_RND ");
655
656 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
657 seq_printf(seq, "QUEUE_MAP_CPU ");
658
659 if (pkt_dev->cflows) {
660 if (pkt_dev->flags & F_FLOW_SEQ)
661 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
662 else
663 seq_printf(seq, "FLOW_RND ");
664 }
665
666 #ifdef CONFIG_XFRM
667 if (pkt_dev->flags & F_IPSEC_ON)
668 seq_printf(seq, "IPSEC ");
669 #endif
670
671 if (pkt_dev->flags & F_MACSRC_RND)
672 seq_printf(seq, "MACSRC_RND ");
673
674 if (pkt_dev->flags & F_MACDST_RND)
675 seq_printf(seq, "MACDST_RND ");
676
677 if (pkt_dev->flags & F_VID_RND)
678 seq_printf(seq, "VID_RND ");
679
680 if (pkt_dev->flags & F_SVID_RND)
681 seq_printf(seq, "SVID_RND ");
682
683 if (pkt_dev->flags & F_NODE)
684 seq_printf(seq, "NODE_ALLOC ");
685
686 seq_puts(seq, "\n");
687
688 /* not really stopped, more like last-running-at */
689 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at;
690 idle = pkt_dev->idle_acc;
691 do_div(idle, NSEC_PER_USEC);
692
693 seq_printf(seq,
694 "Current:\n pkts-sofar: %llu errors: %llu\n",
695 (unsigned long long)pkt_dev->sofar,
696 (unsigned long long)pkt_dev->errors);
697
698 seq_printf(seq,
699 " started: %lluus stopped: %lluus idle: %lluus\n",
700 (unsigned long long) ktime_to_us(pkt_dev->started_at),
701 (unsigned long long) ktime_to_us(stopped),
702 (unsigned long long) idle);
703
704 seq_printf(seq,
705 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
706 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
707 pkt_dev->cur_src_mac_offset);
708
709 if (pkt_dev->flags & F_IPV6) {
710 char b1[128], b2[128];
711 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
712 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
713 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
714 } else
715 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
716 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
717
718 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
719 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
720
721 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
722
723 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
724
725 if (pkt_dev->result[0])
726 seq_printf(seq, "Result: %s\n", pkt_dev->result);
727 else
728 seq_printf(seq, "Result: Idle\n");
729
730 return 0;
731 }
732
733
734 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
735 __u32 *num)
736 {
737 int i = 0;
738 *num = 0;
739
740 for (; i < maxlen; i++) {
741 int value;
742 char c;
743 *num <<= 4;
744 if (get_user(c, &user_buffer[i]))
745 return -EFAULT;
746 value = hex_to_bin(c);
747 if (value >= 0)
748 *num |= value;
749 else
750 break;
751 }
752 return i;
753 }
754
755 static int count_trail_chars(const char __user * user_buffer,
756 unsigned int maxlen)
757 {
758 int i;
759
760 for (i = 0; i < maxlen; i++) {
761 char c;
762 if (get_user(c, &user_buffer[i]))
763 return -EFAULT;
764 switch (c) {
765 case '\"':
766 case '\n':
767 case '\r':
768 case '\t':
769 case ' ':
770 case '=':
771 break;
772 default:
773 goto done;
774 }
775 }
776 done:
777 return i;
778 }
779
780 static unsigned long num_arg(const char __user * user_buffer,
781 unsigned long maxlen, unsigned long *num)
782 {
783 int i;
784 *num = 0;
785
786 for (i = 0; i < maxlen; i++) {
787 char c;
788 if (get_user(c, &user_buffer[i]))
789 return -EFAULT;
790 if ((c >= '0') && (c <= '9')) {
791 *num *= 10;
792 *num += c - '0';
793 } else
794 break;
795 }
796 return i;
797 }
798
799 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
800 {
801 int i;
802
803 for (i = 0; i < maxlen; i++) {
804 char c;
805 if (get_user(c, &user_buffer[i]))
806 return -EFAULT;
807 switch (c) {
808 case '\"':
809 case '\n':
810 case '\r':
811 case '\t':
812 case ' ':
813 goto done_str;
814 break;
815 default:
816 break;
817 }
818 }
819 done_str:
820 return i;
821 }
822
823 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
824 {
825 unsigned n = 0;
826 char c;
827 ssize_t i = 0;
828 int len;
829
830 pkt_dev->nr_labels = 0;
831 do {
832 __u32 tmp;
833 len = hex32_arg(&buffer[i], 8, &tmp);
834 if (len <= 0)
835 return len;
836 pkt_dev->labels[n] = htonl(tmp);
837 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
838 pkt_dev->flags |= F_MPLS_RND;
839 i += len;
840 if (get_user(c, &buffer[i]))
841 return -EFAULT;
842 i++;
843 n++;
844 if (n >= MAX_MPLS_LABELS)
845 return -E2BIG;
846 } while (c == ',');
847
848 pkt_dev->nr_labels = n;
849 return i;
850 }
851
852 static ssize_t pktgen_if_write(struct file *file,
853 const char __user * user_buffer, size_t count,
854 loff_t * offset)
855 {
856 struct seq_file *seq = file->private_data;
857 struct pktgen_dev *pkt_dev = seq->private;
858 int i, max, len;
859 char name[16], valstr[32];
860 unsigned long value = 0;
861 char *pg_result = NULL;
862 int tmp = 0;
863 char buf[128];
864
865 pg_result = &(pkt_dev->result[0]);
866
867 if (count < 1) {
868 pr_warning("wrong command format\n");
869 return -EINVAL;
870 }
871
872 max = count;
873 tmp = count_trail_chars(user_buffer, max);
874 if (tmp < 0) {
875 pr_warning("illegal format\n");
876 return tmp;
877 }
878 i = tmp;
879
880 /* Read variable name */
881
882 len = strn_len(&user_buffer[i], sizeof(name) - 1);
883 if (len < 0)
884 return len;
885
886 memset(name, 0, sizeof(name));
887 if (copy_from_user(name, &user_buffer[i], len))
888 return -EFAULT;
889 i += len;
890
891 max = count - i;
892 len = count_trail_chars(&user_buffer[i], max);
893 if (len < 0)
894 return len;
895
896 i += len;
897
898 if (debug) {
899 size_t copy = min_t(size_t, count, 1023);
900 char tb[copy + 1];
901 if (copy_from_user(tb, user_buffer, copy))
902 return -EFAULT;
903 tb[copy] = 0;
904 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name,
905 (unsigned long)count, tb);
906 }
907
908 if (!strcmp(name, "min_pkt_size")) {
909 len = num_arg(&user_buffer[i], 10, &value);
910 if (len < 0)
911 return len;
912
913 i += len;
914 if (value < 14 + 20 + 8)
915 value = 14 + 20 + 8;
916 if (value != pkt_dev->min_pkt_size) {
917 pkt_dev->min_pkt_size = value;
918 pkt_dev->cur_pkt_size = value;
919 }
920 sprintf(pg_result, "OK: min_pkt_size=%u",
921 pkt_dev->min_pkt_size);
922 return count;
923 }
924
925 if (!strcmp(name, "max_pkt_size")) {
926 len = num_arg(&user_buffer[i], 10, &value);
927 if (len < 0)
928 return len;
929
930 i += len;
931 if (value < 14 + 20 + 8)
932 value = 14 + 20 + 8;
933 if (value != pkt_dev->max_pkt_size) {
934 pkt_dev->max_pkt_size = value;
935 pkt_dev->cur_pkt_size = value;
936 }
937 sprintf(pg_result, "OK: max_pkt_size=%u",
938 pkt_dev->max_pkt_size);
939 return count;
940 }
941
942 /* Shortcut for min = max */
943
944 if (!strcmp(name, "pkt_size")) {
945 len = num_arg(&user_buffer[i], 10, &value);
946 if (len < 0)
947 return len;
948
949 i += len;
950 if (value < 14 + 20 + 8)
951 value = 14 + 20 + 8;
952 if (value != pkt_dev->min_pkt_size) {
953 pkt_dev->min_pkt_size = value;
954 pkt_dev->max_pkt_size = value;
955 pkt_dev->cur_pkt_size = value;
956 }
957 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
958 return count;
959 }
960
961 if (!strcmp(name, "debug")) {
962 len = num_arg(&user_buffer[i], 10, &value);
963 if (len < 0)
964 return len;
965
966 i += len;
967 debug = value;
968 sprintf(pg_result, "OK: debug=%u", debug);
969 return count;
970 }
971
972 if (!strcmp(name, "frags")) {
973 len = num_arg(&user_buffer[i], 10, &value);
974 if (len < 0)
975 return len;
976
977 i += len;
978 pkt_dev->nfrags = value;
979 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
980 return count;
981 }
982 if (!strcmp(name, "delay")) {
983 len = num_arg(&user_buffer[i], 10, &value);
984 if (len < 0)
985 return len;
986
987 i += len;
988 if (value == 0x7FFFFFFF)
989 pkt_dev->delay = ULLONG_MAX;
990 else
991 pkt_dev->delay = (u64)value;
992
993 sprintf(pg_result, "OK: delay=%llu",
994 (unsigned long long) pkt_dev->delay);
995 return count;
996 }
997 if (!strcmp(name, "rate")) {
998 len = num_arg(&user_buffer[i], 10, &value);
999 if (len < 0)
1000 return len;
1001
1002 i += len;
1003 if (!value)
1004 return len;
1005 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
1006 if (debug)
1007 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1008
1009 sprintf(pg_result, "OK: rate=%lu", value);
1010 return count;
1011 }
1012 if (!strcmp(name, "ratep")) {
1013 len = num_arg(&user_buffer[i], 10, &value);
1014 if (len < 0)
1015 return len;
1016
1017 i += len;
1018 if (!value)
1019 return len;
1020 pkt_dev->delay = NSEC_PER_SEC/value;
1021 if (debug)
1022 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1023
1024 sprintf(pg_result, "OK: rate=%lu", value);
1025 return count;
1026 }
1027 if (!strcmp(name, "udp_src_min")) {
1028 len = num_arg(&user_buffer[i], 10, &value);
1029 if (len < 0)
1030 return len;
1031
1032 i += len;
1033 if (value != pkt_dev->udp_src_min) {
1034 pkt_dev->udp_src_min = value;
1035 pkt_dev->cur_udp_src = value;
1036 }
1037 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1038 return count;
1039 }
1040 if (!strcmp(name, "udp_dst_min")) {
1041 len = num_arg(&user_buffer[i], 10, &value);
1042 if (len < 0)
1043 return len;
1044
1045 i += len;
1046 if (value != pkt_dev->udp_dst_min) {
1047 pkt_dev->udp_dst_min = value;
1048 pkt_dev->cur_udp_dst = value;
1049 }
1050 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1051 return count;
1052 }
1053 if (!strcmp(name, "udp_src_max")) {
1054 len = num_arg(&user_buffer[i], 10, &value);
1055 if (len < 0)
1056 return len;
1057
1058 i += len;
1059 if (value != pkt_dev->udp_src_max) {
1060 pkt_dev->udp_src_max = value;
1061 pkt_dev->cur_udp_src = value;
1062 }
1063 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1064 return count;
1065 }
1066 if (!strcmp(name, "udp_dst_max")) {
1067 len = num_arg(&user_buffer[i], 10, &value);
1068 if (len < 0)
1069 return len;
1070
1071 i += len;
1072 if (value != pkt_dev->udp_dst_max) {
1073 pkt_dev->udp_dst_max = value;
1074 pkt_dev->cur_udp_dst = value;
1075 }
1076 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1077 return count;
1078 }
1079 if (!strcmp(name, "clone_skb")) {
1080 len = num_arg(&user_buffer[i], 10, &value);
1081 if (len < 0)
1082 return len;
1083
1084 i += len;
1085 pkt_dev->clone_skb = value;
1086
1087 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1088 return count;
1089 }
1090 if (!strcmp(name, "count")) {
1091 len = num_arg(&user_buffer[i], 10, &value);
1092 if (len < 0)
1093 return len;
1094
1095 i += len;
1096 pkt_dev->count = value;
1097 sprintf(pg_result, "OK: count=%llu",
1098 (unsigned long long)pkt_dev->count);
1099 return count;
1100 }
1101 if (!strcmp(name, "src_mac_count")) {
1102 len = num_arg(&user_buffer[i], 10, &value);
1103 if (len < 0)
1104 return len;
1105
1106 i += len;
1107 if (pkt_dev->src_mac_count != value) {
1108 pkt_dev->src_mac_count = value;
1109 pkt_dev->cur_src_mac_offset = 0;
1110 }
1111 sprintf(pg_result, "OK: src_mac_count=%d",
1112 pkt_dev->src_mac_count);
1113 return count;
1114 }
1115 if (!strcmp(name, "dst_mac_count")) {
1116 len = num_arg(&user_buffer[i], 10, &value);
1117 if (len < 0)
1118 return len;
1119
1120 i += len;
1121 if (pkt_dev->dst_mac_count != value) {
1122 pkt_dev->dst_mac_count = value;
1123 pkt_dev->cur_dst_mac_offset = 0;
1124 }
1125 sprintf(pg_result, "OK: dst_mac_count=%d",
1126 pkt_dev->dst_mac_count);
1127 return count;
1128 }
1129 if (!strcmp(name, "node")) {
1130 len = num_arg(&user_buffer[i], 10, &value);
1131 if (len < 0)
1132 return len;
1133
1134 i += len;
1135
1136 if (node_possible(value)) {
1137 pkt_dev->node = value;
1138 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1139 if (pkt_dev->page) {
1140 put_page(pkt_dev->page);
1141 pkt_dev->page = NULL;
1142 }
1143 }
1144 else
1145 sprintf(pg_result, "ERROR: node not possible");
1146 return count;
1147 }
1148 if (!strcmp(name, "flag")) {
1149 char f[32];
1150 memset(f, 0, 32);
1151 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1152 if (len < 0)
1153 return len;
1154
1155 if (copy_from_user(f, &user_buffer[i], len))
1156 return -EFAULT;
1157 i += len;
1158 if (strcmp(f, "IPSRC_RND") == 0)
1159 pkt_dev->flags |= F_IPSRC_RND;
1160
1161 else if (strcmp(f, "!IPSRC_RND") == 0)
1162 pkt_dev->flags &= ~F_IPSRC_RND;
1163
1164 else if (strcmp(f, "TXSIZE_RND") == 0)
1165 pkt_dev->flags |= F_TXSIZE_RND;
1166
1167 else if (strcmp(f, "!TXSIZE_RND") == 0)
1168 pkt_dev->flags &= ~F_TXSIZE_RND;
1169
1170 else if (strcmp(f, "IPDST_RND") == 0)
1171 pkt_dev->flags |= F_IPDST_RND;
1172
1173 else if (strcmp(f, "!IPDST_RND") == 0)
1174 pkt_dev->flags &= ~F_IPDST_RND;
1175
1176 else if (strcmp(f, "UDPSRC_RND") == 0)
1177 pkt_dev->flags |= F_UDPSRC_RND;
1178
1179 else if (strcmp(f, "!UDPSRC_RND") == 0)
1180 pkt_dev->flags &= ~F_UDPSRC_RND;
1181
1182 else if (strcmp(f, "UDPDST_RND") == 0)
1183 pkt_dev->flags |= F_UDPDST_RND;
1184
1185 else if (strcmp(f, "!UDPDST_RND") == 0)
1186 pkt_dev->flags &= ~F_UDPDST_RND;
1187
1188 else if (strcmp(f, "MACSRC_RND") == 0)
1189 pkt_dev->flags |= F_MACSRC_RND;
1190
1191 else if (strcmp(f, "!MACSRC_RND") == 0)
1192 pkt_dev->flags &= ~F_MACSRC_RND;
1193
1194 else if (strcmp(f, "MACDST_RND") == 0)
1195 pkt_dev->flags |= F_MACDST_RND;
1196
1197 else if (strcmp(f, "!MACDST_RND") == 0)
1198 pkt_dev->flags &= ~F_MACDST_RND;
1199
1200 else if (strcmp(f, "MPLS_RND") == 0)
1201 pkt_dev->flags |= F_MPLS_RND;
1202
1203 else if (strcmp(f, "!MPLS_RND") == 0)
1204 pkt_dev->flags &= ~F_MPLS_RND;
1205
1206 else if (strcmp(f, "VID_RND") == 0)
1207 pkt_dev->flags |= F_VID_RND;
1208
1209 else if (strcmp(f, "!VID_RND") == 0)
1210 pkt_dev->flags &= ~F_VID_RND;
1211
1212 else if (strcmp(f, "SVID_RND") == 0)
1213 pkt_dev->flags |= F_SVID_RND;
1214
1215 else if (strcmp(f, "!SVID_RND") == 0)
1216 pkt_dev->flags &= ~F_SVID_RND;
1217
1218 else if (strcmp(f, "FLOW_SEQ") == 0)
1219 pkt_dev->flags |= F_FLOW_SEQ;
1220
1221 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1222 pkt_dev->flags |= F_QUEUE_MAP_RND;
1223
1224 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1225 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1226
1227 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1228 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1229
1230 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1231 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1232 #ifdef CONFIG_XFRM
1233 else if (strcmp(f, "IPSEC") == 0)
1234 pkt_dev->flags |= F_IPSEC_ON;
1235 #endif
1236
1237 else if (strcmp(f, "!IPV6") == 0)
1238 pkt_dev->flags &= ~F_IPV6;
1239
1240 else if (strcmp(f, "NODE_ALLOC") == 0)
1241 pkt_dev->flags |= F_NODE;
1242
1243 else if (strcmp(f, "!NODE_ALLOC") == 0)
1244 pkt_dev->flags &= ~F_NODE;
1245
1246 else {
1247 sprintf(pg_result,
1248 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1249 f,
1250 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1251 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n");
1252 return count;
1253 }
1254 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1255 return count;
1256 }
1257 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1258 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1259 if (len < 0)
1260 return len;
1261
1262 if (copy_from_user(buf, &user_buffer[i], len))
1263 return -EFAULT;
1264 buf[len] = 0;
1265 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1266 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1267 strncpy(pkt_dev->dst_min, buf, len);
1268 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1269 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1270 }
1271 if (debug)
1272 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1273 pkt_dev->dst_min);
1274 i += len;
1275 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1276 return count;
1277 }
1278 if (!strcmp(name, "dst_max")) {
1279 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1280 if (len < 0)
1281 return len;
1282
1283
1284 if (copy_from_user(buf, &user_buffer[i], len))
1285 return -EFAULT;
1286
1287 buf[len] = 0;
1288 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1289 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1290 strncpy(pkt_dev->dst_max, buf, len);
1291 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1292 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1293 }
1294 if (debug)
1295 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1296 pkt_dev->dst_max);
1297 i += len;
1298 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1299 return count;
1300 }
1301 if (!strcmp(name, "dst6")) {
1302 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1303 if (len < 0)
1304 return len;
1305
1306 pkt_dev->flags |= F_IPV6;
1307
1308 if (copy_from_user(buf, &user_buffer[i], len))
1309 return -EFAULT;
1310 buf[len] = 0;
1311
1312 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1313 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1314
1315 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1316
1317 if (debug)
1318 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1319
1320 i += len;
1321 sprintf(pg_result, "OK: dst6=%s", buf);
1322 return count;
1323 }
1324 if (!strcmp(name, "dst6_min")) {
1325 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1326 if (len < 0)
1327 return len;
1328
1329 pkt_dev->flags |= F_IPV6;
1330
1331 if (copy_from_user(buf, &user_buffer[i], len))
1332 return -EFAULT;
1333 buf[len] = 0;
1334
1335 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1336 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1337
1338 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1339 &pkt_dev->min_in6_daddr);
1340 if (debug)
1341 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1342
1343 i += len;
1344 sprintf(pg_result, "OK: dst6_min=%s", buf);
1345 return count;
1346 }
1347 if (!strcmp(name, "dst6_max")) {
1348 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1349 if (len < 0)
1350 return len;
1351
1352 pkt_dev->flags |= F_IPV6;
1353
1354 if (copy_from_user(buf, &user_buffer[i], len))
1355 return -EFAULT;
1356 buf[len] = 0;
1357
1358 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1359 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1360
1361 if (debug)
1362 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1363
1364 i += len;
1365 sprintf(pg_result, "OK: dst6_max=%s", buf);
1366 return count;
1367 }
1368 if (!strcmp(name, "src6")) {
1369 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1370 if (len < 0)
1371 return len;
1372
1373 pkt_dev->flags |= F_IPV6;
1374
1375 if (copy_from_user(buf, &user_buffer[i], len))
1376 return -EFAULT;
1377 buf[len] = 0;
1378
1379 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1380 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1381
1382 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1383
1384 if (debug)
1385 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1386
1387 i += len;
1388 sprintf(pg_result, "OK: src6=%s", buf);
1389 return count;
1390 }
1391 if (!strcmp(name, "src_min")) {
1392 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1393 if (len < 0)
1394 return len;
1395
1396 if (copy_from_user(buf, &user_buffer[i], len))
1397 return -EFAULT;
1398 buf[len] = 0;
1399 if (strcmp(buf, pkt_dev->src_min) != 0) {
1400 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1401 strncpy(pkt_dev->src_min, buf, len);
1402 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1403 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1404 }
1405 if (debug)
1406 printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1407 pkt_dev->src_min);
1408 i += len;
1409 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1410 return count;
1411 }
1412 if (!strcmp(name, "src_max")) {
1413 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1414 if (len < 0)
1415 return len;
1416
1417 if (copy_from_user(buf, &user_buffer[i], len))
1418 return -EFAULT;
1419 buf[len] = 0;
1420 if (strcmp(buf, pkt_dev->src_max) != 0) {
1421 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1422 strncpy(pkt_dev->src_max, buf, len);
1423 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1424 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1425 }
1426 if (debug)
1427 printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1428 pkt_dev->src_max);
1429 i += len;
1430 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1431 return count;
1432 }
1433 if (!strcmp(name, "dst_mac")) {
1434 char *v = valstr;
1435 unsigned char old_dmac[ETH_ALEN];
1436 unsigned char *m = pkt_dev->dst_mac;
1437 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1438
1439 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1440 if (len < 0)
1441 return len;
1442
1443 memset(valstr, 0, sizeof(valstr));
1444 if (copy_from_user(valstr, &user_buffer[i], len))
1445 return -EFAULT;
1446 i += len;
1447
1448 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1449 int value;
1450
1451 value = hex_to_bin(*v);
1452 if (value >= 0)
1453 *m = *m * 16 + value;
1454
1455 if (*v == ':') {
1456 m++;
1457 *m = 0;
1458 }
1459 }
1460
1461 /* Set up Dest MAC */
1462 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1463 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1464
1465 sprintf(pg_result, "OK: dstmac");
1466 return count;
1467 }
1468 if (!strcmp(name, "src_mac")) {
1469 char *v = valstr;
1470 unsigned char old_smac[ETH_ALEN];
1471 unsigned char *m = pkt_dev->src_mac;
1472
1473 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN);
1474
1475 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1476 if (len < 0)
1477 return len;
1478
1479 memset(valstr, 0, sizeof(valstr));
1480 if (copy_from_user(valstr, &user_buffer[i], len))
1481 return -EFAULT;
1482 i += len;
1483
1484 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1485 int value;
1486
1487 value = hex_to_bin(*v);
1488 if (value >= 0)
1489 *m = *m * 16 + value;
1490
1491 if (*v == ':') {
1492 m++;
1493 *m = 0;
1494 }
1495 }
1496
1497 /* Set up Src MAC */
1498 if (compare_ether_addr(old_smac, pkt_dev->src_mac))
1499 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN);
1500
1501 sprintf(pg_result, "OK: srcmac");
1502 return count;
1503 }
1504
1505 if (!strcmp(name, "clear_counters")) {
1506 pktgen_clear_counters(pkt_dev);
1507 sprintf(pg_result, "OK: Clearing counters.\n");
1508 return count;
1509 }
1510
1511 if (!strcmp(name, "flows")) {
1512 len = num_arg(&user_buffer[i], 10, &value);
1513 if (len < 0)
1514 return len;
1515
1516 i += len;
1517 if (value > MAX_CFLOWS)
1518 value = MAX_CFLOWS;
1519
1520 pkt_dev->cflows = value;
1521 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1522 return count;
1523 }
1524
1525 if (!strcmp(name, "flowlen")) {
1526 len = num_arg(&user_buffer[i], 10, &value);
1527 if (len < 0)
1528 return len;
1529
1530 i += len;
1531 pkt_dev->lflow = value;
1532 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1533 return count;
1534 }
1535
1536 if (!strcmp(name, "queue_map_min")) {
1537 len = num_arg(&user_buffer[i], 5, &value);
1538 if (len < 0)
1539 return len;
1540
1541 i += len;
1542 pkt_dev->queue_map_min = value;
1543 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1544 return count;
1545 }
1546
1547 if (!strcmp(name, "queue_map_max")) {
1548 len = num_arg(&user_buffer[i], 5, &value);
1549 if (len < 0)
1550 return len;
1551
1552 i += len;
1553 pkt_dev->queue_map_max = value;
1554 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1555 return count;
1556 }
1557
1558 if (!strcmp(name, "mpls")) {
1559 unsigned n, cnt;
1560
1561 len = get_labels(&user_buffer[i], pkt_dev);
1562 if (len < 0)
1563 return len;
1564 i += len;
1565 cnt = sprintf(pg_result, "OK: mpls=");
1566 for (n = 0; n < pkt_dev->nr_labels; n++)
1567 cnt += sprintf(pg_result + cnt,
1568 "%08x%s", ntohl(pkt_dev->labels[n]),
1569 n == pkt_dev->nr_labels-1 ? "" : ",");
1570
1571 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1572 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1573 pkt_dev->svlan_id = 0xffff;
1574
1575 if (debug)
1576 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1577 }
1578 return count;
1579 }
1580
1581 if (!strcmp(name, "vlan_id")) {
1582 len = num_arg(&user_buffer[i], 4, &value);
1583 if (len < 0)
1584 return len;
1585
1586 i += len;
1587 if (value <= 4095) {
1588 pkt_dev->vlan_id = value; /* turn on VLAN */
1589
1590 if (debug)
1591 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1592
1593 if (debug && pkt_dev->nr_labels)
1594 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1595
1596 pkt_dev->nr_labels = 0; /* turn off MPLS */
1597 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1598 } else {
1599 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1600 pkt_dev->svlan_id = 0xffff;
1601
1602 if (debug)
1603 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1604 }
1605 return count;
1606 }
1607
1608 if (!strcmp(name, "vlan_p")) {
1609 len = num_arg(&user_buffer[i], 1, &value);
1610 if (len < 0)
1611 return len;
1612
1613 i += len;
1614 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1615 pkt_dev->vlan_p = value;
1616 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1617 } else {
1618 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1619 }
1620 return count;
1621 }
1622
1623 if (!strcmp(name, "vlan_cfi")) {
1624 len = num_arg(&user_buffer[i], 1, &value);
1625 if (len < 0)
1626 return len;
1627
1628 i += len;
1629 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1630 pkt_dev->vlan_cfi = value;
1631 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1632 } else {
1633 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1634 }
1635 return count;
1636 }
1637
1638 if (!strcmp(name, "svlan_id")) {
1639 len = num_arg(&user_buffer[i], 4, &value);
1640 if (len < 0)
1641 return len;
1642
1643 i += len;
1644 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1645 pkt_dev->svlan_id = value; /* turn on SVLAN */
1646
1647 if (debug)
1648 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1649
1650 if (debug && pkt_dev->nr_labels)
1651 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1652
1653 pkt_dev->nr_labels = 0; /* turn off MPLS */
1654 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1655 } else {
1656 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1657 pkt_dev->svlan_id = 0xffff;
1658
1659 if (debug)
1660 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1661 }
1662 return count;
1663 }
1664
1665 if (!strcmp(name, "svlan_p")) {
1666 len = num_arg(&user_buffer[i], 1, &value);
1667 if (len < 0)
1668 return len;
1669
1670 i += len;
1671 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1672 pkt_dev->svlan_p = value;
1673 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1674 } else {
1675 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1676 }
1677 return count;
1678 }
1679
1680 if (!strcmp(name, "svlan_cfi")) {
1681 len = num_arg(&user_buffer[i], 1, &value);
1682 if (len < 0)
1683 return len;
1684
1685 i += len;
1686 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1687 pkt_dev->svlan_cfi = value;
1688 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1689 } else {
1690 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1691 }
1692 return count;
1693 }
1694
1695 if (!strcmp(name, "tos")) {
1696 __u32 tmp_value = 0;
1697 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1698 if (len < 0)
1699 return len;
1700
1701 i += len;
1702 if (len == 2) {
1703 pkt_dev->tos = tmp_value;
1704 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1705 } else {
1706 sprintf(pg_result, "ERROR: tos must be 00-ff");
1707 }
1708 return count;
1709 }
1710
1711 if (!strcmp(name, "traffic_class")) {
1712 __u32 tmp_value = 0;
1713 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1714 if (len < 0)
1715 return len;
1716
1717 i += len;
1718 if (len == 2) {
1719 pkt_dev->traffic_class = tmp_value;
1720 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1721 } else {
1722 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1723 }
1724 return count;
1725 }
1726
1727 if (!strcmp(name, "skb_priority")) {
1728 len = num_arg(&user_buffer[i], 9, &value);
1729 if (len < 0)
1730 return len;
1731
1732 i += len;
1733 pkt_dev->skb_priority = value;
1734 sprintf(pg_result, "OK: skb_priority=%i",
1735 pkt_dev->skb_priority);
1736 return count;
1737 }
1738
1739 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1740 return -EINVAL;
1741 }
1742
1743 static int pktgen_if_open(struct inode *inode, struct file *file)
1744 {
1745 return single_open(file, pktgen_if_show, PDE(inode)->data);
1746 }
1747
1748 static const struct file_operations pktgen_if_fops = {
1749 .owner = THIS_MODULE,
1750 .open = pktgen_if_open,
1751 .read = seq_read,
1752 .llseek = seq_lseek,
1753 .write = pktgen_if_write,
1754 .release = single_release,
1755 };
1756
1757 static int pktgen_thread_show(struct seq_file *seq, void *v)
1758 {
1759 struct pktgen_thread *t = seq->private;
1760 const struct pktgen_dev *pkt_dev;
1761
1762 BUG_ON(!t);
1763
1764 seq_printf(seq, "Running: ");
1765
1766 if_lock(t);
1767 list_for_each_entry(pkt_dev, &t->if_list, list)
1768 if (pkt_dev->running)
1769 seq_printf(seq, "%s ", pkt_dev->odevname);
1770
1771 seq_printf(seq, "\nStopped: ");
1772
1773 list_for_each_entry(pkt_dev, &t->if_list, list)
1774 if (!pkt_dev->running)
1775 seq_printf(seq, "%s ", pkt_dev->odevname);
1776
1777 if (t->result[0])
1778 seq_printf(seq, "\nResult: %s\n", t->result);
1779 else
1780 seq_printf(seq, "\nResult: NA\n");
1781
1782 if_unlock(t);
1783
1784 return 0;
1785 }
1786
1787 static ssize_t pktgen_thread_write(struct file *file,
1788 const char __user * user_buffer,
1789 size_t count, loff_t * offset)
1790 {
1791 struct seq_file *seq = file->private_data;
1792 struct pktgen_thread *t = seq->private;
1793 int i, max, len, ret;
1794 char name[40];
1795 char *pg_result;
1796
1797 if (count < 1) {
1798 // sprintf(pg_result, "Wrong command format");
1799 return -EINVAL;
1800 }
1801
1802 max = count;
1803 len = count_trail_chars(user_buffer, max);
1804 if (len < 0)
1805 return len;
1806
1807 i = len;
1808
1809 /* Read variable name */
1810
1811 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1812 if (len < 0)
1813 return len;
1814
1815 memset(name, 0, sizeof(name));
1816 if (copy_from_user(name, &user_buffer[i], len))
1817 return -EFAULT;
1818 i += len;
1819
1820 max = count - i;
1821 len = count_trail_chars(&user_buffer[i], max);
1822 if (len < 0)
1823 return len;
1824
1825 i += len;
1826
1827 if (debug)
1828 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1829 name, (unsigned long)count);
1830
1831 if (!t) {
1832 pr_err("ERROR: No thread\n");
1833 ret = -EINVAL;
1834 goto out;
1835 }
1836
1837 pg_result = &(t->result[0]);
1838
1839 if (!strcmp(name, "add_device")) {
1840 char f[32];
1841 memset(f, 0, 32);
1842 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1843 if (len < 0) {
1844 ret = len;
1845 goto out;
1846 }
1847 if (copy_from_user(f, &user_buffer[i], len))
1848 return -EFAULT;
1849 i += len;
1850 mutex_lock(&pktgen_thread_lock);
1851 pktgen_add_device(t, f);
1852 mutex_unlock(&pktgen_thread_lock);
1853 ret = count;
1854 sprintf(pg_result, "OK: add_device=%s", f);
1855 goto out;
1856 }
1857
1858 if (!strcmp(name, "rem_device_all")) {
1859 mutex_lock(&pktgen_thread_lock);
1860 t->control |= T_REMDEVALL;
1861 mutex_unlock(&pktgen_thread_lock);
1862 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1863 ret = count;
1864 sprintf(pg_result, "OK: rem_device_all");
1865 goto out;
1866 }
1867
1868 if (!strcmp(name, "max_before_softirq")) {
1869 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1870 ret = count;
1871 goto out;
1872 }
1873
1874 ret = -EINVAL;
1875 out:
1876 return ret;
1877 }
1878
1879 static int pktgen_thread_open(struct inode *inode, struct file *file)
1880 {
1881 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1882 }
1883
1884 static const struct file_operations pktgen_thread_fops = {
1885 .owner = THIS_MODULE,
1886 .open = pktgen_thread_open,
1887 .read = seq_read,
1888 .llseek = seq_lseek,
1889 .write = pktgen_thread_write,
1890 .release = single_release,
1891 };
1892
1893 /* Think find or remove for NN */
1894 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1895 {
1896 struct pktgen_thread *t;
1897 struct pktgen_dev *pkt_dev = NULL;
1898 bool exact = (remove == FIND);
1899
1900 list_for_each_entry(t, &pktgen_threads, th_list) {
1901 pkt_dev = pktgen_find_dev(t, ifname, exact);
1902 if (pkt_dev) {
1903 if (remove) {
1904 if_lock(t);
1905 pkt_dev->removal_mark = 1;
1906 t->control |= T_REMDEV;
1907 if_unlock(t);
1908 }
1909 break;
1910 }
1911 }
1912 return pkt_dev;
1913 }
1914
1915 /*
1916 * mark a device for removal
1917 */
1918 static void pktgen_mark_device(const char *ifname)
1919 {
1920 struct pktgen_dev *pkt_dev = NULL;
1921 const int max_tries = 10, msec_per_try = 125;
1922 int i = 0;
1923
1924 mutex_lock(&pktgen_thread_lock);
1925 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1926
1927 while (1) {
1928
1929 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1930 if (pkt_dev == NULL)
1931 break; /* success */
1932
1933 mutex_unlock(&pktgen_thread_lock);
1934 pr_debug("%s: waiting for %s to disappear....\n",
1935 __func__, ifname);
1936 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1937 mutex_lock(&pktgen_thread_lock);
1938
1939 if (++i >= max_tries) {
1940 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1941 __func__, msec_per_try * i, ifname);
1942 break;
1943 }
1944
1945 }
1946
1947 mutex_unlock(&pktgen_thread_lock);
1948 }
1949
1950 static void pktgen_change_name(struct net_device *dev)
1951 {
1952 struct pktgen_thread *t;
1953
1954 list_for_each_entry(t, &pktgen_threads, th_list) {
1955 struct pktgen_dev *pkt_dev;
1956
1957 list_for_each_entry(pkt_dev, &t->if_list, list) {
1958 if (pkt_dev->odev != dev)
1959 continue;
1960
1961 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1962
1963 pkt_dev->entry = proc_create_data(dev->name, 0600,
1964 pg_proc_dir,
1965 &pktgen_if_fops,
1966 pkt_dev);
1967 if (!pkt_dev->entry)
1968 pr_err("can't move proc entry for '%s'\n",
1969 dev->name);
1970 break;
1971 }
1972 }
1973 }
1974
1975 static int pktgen_device_event(struct notifier_block *unused,
1976 unsigned long event, void *ptr)
1977 {
1978 struct net_device *dev = ptr;
1979
1980 if (!net_eq(dev_net(dev), &init_net))
1981 return NOTIFY_DONE;
1982
1983 /* It is OK that we do not hold the group lock right now,
1984 * as we run under the RTNL lock.
1985 */
1986
1987 switch (event) {
1988 case NETDEV_CHANGENAME:
1989 pktgen_change_name(dev);
1990 break;
1991
1992 case NETDEV_UNREGISTER:
1993 pktgen_mark_device(dev->name);
1994 break;
1995 }
1996
1997 return NOTIFY_DONE;
1998 }
1999
2000 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev,
2001 const char *ifname)
2002 {
2003 char b[IFNAMSIZ+5];
2004 int i;
2005
2006 for (i = 0; ifname[i] != '@'; i++) {
2007 if (i == IFNAMSIZ)
2008 break;
2009
2010 b[i] = ifname[i];
2011 }
2012 b[i] = 0;
2013
2014 return dev_get_by_name(&init_net, b);
2015 }
2016
2017
2018 /* Associate pktgen_dev with a device. */
2019
2020 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
2021 {
2022 struct net_device *odev;
2023 int err;
2024
2025 /* Clean old setups */
2026 if (pkt_dev->odev) {
2027 dev_put(pkt_dev->odev);
2028 pkt_dev->odev = NULL;
2029 }
2030
2031 odev = pktgen_dev_get_by_name(pkt_dev, ifname);
2032 if (!odev) {
2033 pr_err("no such netdevice: \"%s\"\n", ifname);
2034 return -ENODEV;
2035 }
2036
2037 if (odev->type != ARPHRD_ETHER) {
2038 pr_err("not an ethernet device: \"%s\"\n", ifname);
2039 err = -EINVAL;
2040 } else if (!netif_running(odev)) {
2041 pr_err("device is down: \"%s\"\n", ifname);
2042 err = -ENETDOWN;
2043 } else {
2044 pkt_dev->odev = odev;
2045 return 0;
2046 }
2047
2048 dev_put(odev);
2049 return err;
2050 }
2051
2052 /* Read pkt_dev from the interface and set up internal pktgen_dev
2053 * structure to have the right information to create/send packets
2054 */
2055 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2056 {
2057 int ntxq;
2058
2059 if (!pkt_dev->odev) {
2060 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2061 sprintf(pkt_dev->result,
2062 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2063 return;
2064 }
2065
2066 /* make sure that we don't pick a non-existing transmit queue */
2067 ntxq = pkt_dev->odev->real_num_tx_queues;
2068
2069 if (ntxq <= pkt_dev->queue_map_min) {
2070 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2071 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2072 pkt_dev->odevname);
2073 pkt_dev->queue_map_min = ntxq - 1;
2074 }
2075 if (pkt_dev->queue_map_max >= ntxq) {
2076 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2077 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2078 pkt_dev->odevname);
2079 pkt_dev->queue_map_max = ntxq - 1;
2080 }
2081
2082 /* Default to the interface's mac if not explicitly set. */
2083
2084 if (is_zero_ether_addr(pkt_dev->src_mac))
2085 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2086
2087 /* Set up Dest MAC */
2088 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2089
2090 /* Set up pkt size */
2091 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2092
2093 if (pkt_dev->flags & F_IPV6) {
2094 /*
2095 * Skip this automatic address setting until locks or functions
2096 * gets exported
2097 */
2098
2099 #ifdef NOTNOW
2100 int i, set = 0, err = 1;
2101 struct inet6_dev *idev;
2102
2103 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2104 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2105 set = 1;
2106 break;
2107 }
2108
2109 if (!set) {
2110
2111 /*
2112 * Use linklevel address if unconfigured.
2113 *
2114 * use ipv6_get_lladdr if/when it's get exported
2115 */
2116
2117 rcu_read_lock();
2118 idev = __in6_dev_get(pkt_dev->odev);
2119 if (idev) {
2120 struct inet6_ifaddr *ifp;
2121
2122 read_lock_bh(&idev->lock);
2123 for (ifp = idev->addr_list; ifp;
2124 ifp = ifp->if_next) {
2125 if (ifp->scope == IFA_LINK &&
2126 !(ifp->flags & IFA_F_TENTATIVE)) {
2127 ipv6_addr_copy(&pkt_dev->
2128 cur_in6_saddr,
2129 &ifp->addr);
2130 err = 0;
2131 break;
2132 }
2133 }
2134 read_unlock_bh(&idev->lock);
2135 }
2136 rcu_read_unlock();
2137 if (err)
2138 pr_err("ERROR: IPv6 link address not available\n");
2139 }
2140 #endif
2141 } else {
2142 pkt_dev->saddr_min = 0;
2143 pkt_dev->saddr_max = 0;
2144 if (strlen(pkt_dev->src_min) == 0) {
2145
2146 struct in_device *in_dev;
2147
2148 rcu_read_lock();
2149 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2150 if (in_dev) {
2151 if (in_dev->ifa_list) {
2152 pkt_dev->saddr_min =
2153 in_dev->ifa_list->ifa_address;
2154 pkt_dev->saddr_max = pkt_dev->saddr_min;
2155 }
2156 }
2157 rcu_read_unlock();
2158 } else {
2159 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2160 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2161 }
2162
2163 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2164 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2165 }
2166 /* Initialize current values. */
2167 pkt_dev->cur_dst_mac_offset = 0;
2168 pkt_dev->cur_src_mac_offset = 0;
2169 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2170 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2171 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2172 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2173 pkt_dev->nflows = 0;
2174 }
2175
2176
2177 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2178 {
2179 ktime_t start_time, end_time;
2180 s64 remaining;
2181 struct hrtimer_sleeper t;
2182
2183 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2184 hrtimer_set_expires(&t.timer, spin_until);
2185
2186 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2187 if (remaining <= 0) {
2188 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2189 return;
2190 }
2191
2192 start_time = ktime_now();
2193 if (remaining < 100000)
2194 ndelay(remaining); /* really small just spin */
2195 else {
2196 /* see do_nanosleep */
2197 hrtimer_init_sleeper(&t, current);
2198 do {
2199 set_current_state(TASK_INTERRUPTIBLE);
2200 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2201 if (!hrtimer_active(&t.timer))
2202 t.task = NULL;
2203
2204 if (likely(t.task))
2205 schedule();
2206
2207 hrtimer_cancel(&t.timer);
2208 } while (t.task && pkt_dev->running && !signal_pending(current));
2209 __set_current_state(TASK_RUNNING);
2210 }
2211 end_time = ktime_now();
2212
2213 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2214 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2215 }
2216
2217 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2218 {
2219 pkt_dev->pkt_overhead = 0;
2220 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2221 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2222 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2223 }
2224
2225 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2226 {
2227 return !!(pkt_dev->flows[flow].flags & F_INIT);
2228 }
2229
2230 static inline int f_pick(struct pktgen_dev *pkt_dev)
2231 {
2232 int flow = pkt_dev->curfl;
2233
2234 if (pkt_dev->flags & F_FLOW_SEQ) {
2235 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2236 /* reset time */
2237 pkt_dev->flows[flow].count = 0;
2238 pkt_dev->flows[flow].flags = 0;
2239 pkt_dev->curfl += 1;
2240 if (pkt_dev->curfl >= pkt_dev->cflows)
2241 pkt_dev->curfl = 0; /*reset */
2242 }
2243 } else {
2244 flow = random32() % pkt_dev->cflows;
2245 pkt_dev->curfl = flow;
2246
2247 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2248 pkt_dev->flows[flow].count = 0;
2249 pkt_dev->flows[flow].flags = 0;
2250 }
2251 }
2252
2253 return pkt_dev->curfl;
2254 }
2255
2256
2257 #ifdef CONFIG_XFRM
2258 /* If there was already an IPSEC SA, we keep it as is, else
2259 * we go look for it ...
2260 */
2261 #define DUMMY_MARK 0
2262 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2263 {
2264 struct xfrm_state *x = pkt_dev->flows[flow].x;
2265 if (!x) {
2266 /*slow path: we dont already have xfrm_state*/
2267 x = xfrm_stateonly_find(&init_net, DUMMY_MARK,
2268 (xfrm_address_t *)&pkt_dev->cur_daddr,
2269 (xfrm_address_t *)&pkt_dev->cur_saddr,
2270 AF_INET,
2271 pkt_dev->ipsmode,
2272 pkt_dev->ipsproto, 0);
2273 if (x) {
2274 pkt_dev->flows[flow].x = x;
2275 set_pkt_overhead(pkt_dev);
2276 pkt_dev->pkt_overhead += x->props.header_len;
2277 }
2278
2279 }
2280 }
2281 #endif
2282 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2283 {
2284
2285 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2286 pkt_dev->cur_queue_map = smp_processor_id();
2287
2288 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2289 __u16 t;
2290 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2291 t = random32() %
2292 (pkt_dev->queue_map_max -
2293 pkt_dev->queue_map_min + 1)
2294 + pkt_dev->queue_map_min;
2295 } else {
2296 t = pkt_dev->cur_queue_map + 1;
2297 if (t > pkt_dev->queue_map_max)
2298 t = pkt_dev->queue_map_min;
2299 }
2300 pkt_dev->cur_queue_map = t;
2301 }
2302 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2303 }
2304
2305 /* Increment/randomize headers according to flags and current values
2306 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2307 */
2308 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2309 {
2310 __u32 imn;
2311 __u32 imx;
2312 int flow = 0;
2313
2314 if (pkt_dev->cflows)
2315 flow = f_pick(pkt_dev);
2316
2317 /* Deal with source MAC */
2318 if (pkt_dev->src_mac_count > 1) {
2319 __u32 mc;
2320 __u32 tmp;
2321
2322 if (pkt_dev->flags & F_MACSRC_RND)
2323 mc = random32() % pkt_dev->src_mac_count;
2324 else {
2325 mc = pkt_dev->cur_src_mac_offset++;
2326 if (pkt_dev->cur_src_mac_offset >=
2327 pkt_dev->src_mac_count)
2328 pkt_dev->cur_src_mac_offset = 0;
2329 }
2330
2331 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2332 pkt_dev->hh[11] = tmp;
2333 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2334 pkt_dev->hh[10] = tmp;
2335 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2336 pkt_dev->hh[9] = tmp;
2337 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2338 pkt_dev->hh[8] = tmp;
2339 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2340 pkt_dev->hh[7] = tmp;
2341 }
2342
2343 /* Deal with Destination MAC */
2344 if (pkt_dev->dst_mac_count > 1) {
2345 __u32 mc;
2346 __u32 tmp;
2347
2348 if (pkt_dev->flags & F_MACDST_RND)
2349 mc = random32() % pkt_dev->dst_mac_count;
2350
2351 else {
2352 mc = pkt_dev->cur_dst_mac_offset++;
2353 if (pkt_dev->cur_dst_mac_offset >=
2354 pkt_dev->dst_mac_count) {
2355 pkt_dev->cur_dst_mac_offset = 0;
2356 }
2357 }
2358
2359 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2360 pkt_dev->hh[5] = tmp;
2361 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2362 pkt_dev->hh[4] = tmp;
2363 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2364 pkt_dev->hh[3] = tmp;
2365 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2366 pkt_dev->hh[2] = tmp;
2367 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2368 pkt_dev->hh[1] = tmp;
2369 }
2370
2371 if (pkt_dev->flags & F_MPLS_RND) {
2372 unsigned i;
2373 for (i = 0; i < pkt_dev->nr_labels; i++)
2374 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2375 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2376 ((__force __be32)random32() &
2377 htonl(0x000fffff));
2378 }
2379
2380 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2381 pkt_dev->vlan_id = random32() & (4096-1);
2382 }
2383
2384 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2385 pkt_dev->svlan_id = random32() & (4096 - 1);
2386 }
2387
2388 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2389 if (pkt_dev->flags & F_UDPSRC_RND)
2390 pkt_dev->cur_udp_src = random32() %
2391 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2392 + pkt_dev->udp_src_min;
2393
2394 else {
2395 pkt_dev->cur_udp_src++;
2396 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2397 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2398 }
2399 }
2400
2401 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2402 if (pkt_dev->flags & F_UDPDST_RND) {
2403 pkt_dev->cur_udp_dst = random32() %
2404 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2405 + pkt_dev->udp_dst_min;
2406 } else {
2407 pkt_dev->cur_udp_dst++;
2408 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2409 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2410 }
2411 }
2412
2413 if (!(pkt_dev->flags & F_IPV6)) {
2414
2415 imn = ntohl(pkt_dev->saddr_min);
2416 imx = ntohl(pkt_dev->saddr_max);
2417 if (imn < imx) {
2418 __u32 t;
2419 if (pkt_dev->flags & F_IPSRC_RND)
2420 t = random32() % (imx - imn) + imn;
2421 else {
2422 t = ntohl(pkt_dev->cur_saddr);
2423 t++;
2424 if (t > imx)
2425 t = imn;
2426
2427 }
2428 pkt_dev->cur_saddr = htonl(t);
2429 }
2430
2431 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2432 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2433 } else {
2434 imn = ntohl(pkt_dev->daddr_min);
2435 imx = ntohl(pkt_dev->daddr_max);
2436 if (imn < imx) {
2437 __u32 t;
2438 __be32 s;
2439 if (pkt_dev->flags & F_IPDST_RND) {
2440
2441 t = random32() % (imx - imn) + imn;
2442 s = htonl(t);
2443
2444 while (ipv4_is_loopback(s) ||
2445 ipv4_is_multicast(s) ||
2446 ipv4_is_lbcast(s) ||
2447 ipv4_is_zeronet(s) ||
2448 ipv4_is_local_multicast(s)) {
2449 t = random32() % (imx - imn) + imn;
2450 s = htonl(t);
2451 }
2452 pkt_dev->cur_daddr = s;
2453 } else {
2454 t = ntohl(pkt_dev->cur_daddr);
2455 t++;
2456 if (t > imx) {
2457 t = imn;
2458 }
2459 pkt_dev->cur_daddr = htonl(t);
2460 }
2461 }
2462 if (pkt_dev->cflows) {
2463 pkt_dev->flows[flow].flags |= F_INIT;
2464 pkt_dev->flows[flow].cur_daddr =
2465 pkt_dev->cur_daddr;
2466 #ifdef CONFIG_XFRM
2467 if (pkt_dev->flags & F_IPSEC_ON)
2468 get_ipsec_sa(pkt_dev, flow);
2469 #endif
2470 pkt_dev->nflows++;
2471 }
2472 }
2473 } else { /* IPV6 * */
2474
2475 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2476 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2477 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2478 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2479 else {
2480 int i;
2481
2482 /* Only random destinations yet */
2483
2484 for (i = 0; i < 4; i++) {
2485 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2486 (((__force __be32)random32() |
2487 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2488 pkt_dev->max_in6_daddr.s6_addr32[i]);
2489 }
2490 }
2491 }
2492
2493 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2494 __u32 t;
2495 if (pkt_dev->flags & F_TXSIZE_RND) {
2496 t = random32() %
2497 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2498 + pkt_dev->min_pkt_size;
2499 } else {
2500 t = pkt_dev->cur_pkt_size + 1;
2501 if (t > pkt_dev->max_pkt_size)
2502 t = pkt_dev->min_pkt_size;
2503 }
2504 pkt_dev->cur_pkt_size = t;
2505 }
2506
2507 set_cur_queue_map(pkt_dev);
2508
2509 pkt_dev->flows[flow].count++;
2510 }
2511
2512
2513 #ifdef CONFIG_XFRM
2514 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2515 {
2516 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2517 int err = 0;
2518 struct iphdr *iph;
2519
2520 if (!x)
2521 return 0;
2522 /* XXX: we dont support tunnel mode for now until
2523 * we resolve the dst issue */
2524 if (x->props.mode != XFRM_MODE_TRANSPORT)
2525 return 0;
2526
2527 spin_lock(&x->lock);
2528 iph = ip_hdr(skb);
2529
2530 err = x->outer_mode->output(x, skb);
2531 if (err)
2532 goto error;
2533 err = x->type->output(x, skb);
2534 if (err)
2535 goto error;
2536
2537 x->curlft.bytes += skb->len;
2538 x->curlft.packets++;
2539 error:
2540 spin_unlock(&x->lock);
2541 return err;
2542 }
2543
2544 static void free_SAs(struct pktgen_dev *pkt_dev)
2545 {
2546 if (pkt_dev->cflows) {
2547 /* let go of the SAs if we have them */
2548 int i;
2549 for (i = 0; i < pkt_dev->cflows; i++) {
2550 struct xfrm_state *x = pkt_dev->flows[i].x;
2551 if (x) {
2552 xfrm_state_put(x);
2553 pkt_dev->flows[i].x = NULL;
2554 }
2555 }
2556 }
2557 }
2558
2559 static int process_ipsec(struct pktgen_dev *pkt_dev,
2560 struct sk_buff *skb, __be16 protocol)
2561 {
2562 if (pkt_dev->flags & F_IPSEC_ON) {
2563 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2564 int nhead = 0;
2565 if (x) {
2566 int ret;
2567 __u8 *eth;
2568 nhead = x->props.header_len - skb_headroom(skb);
2569 if (nhead > 0) {
2570 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2571 if (ret < 0) {
2572 pr_err("Error expanding ipsec packet %d\n",
2573 ret);
2574 goto err;
2575 }
2576 }
2577
2578 /* ipsec is not expecting ll header */
2579 skb_pull(skb, ETH_HLEN);
2580 ret = pktgen_output_ipsec(skb, pkt_dev);
2581 if (ret) {
2582 pr_err("Error creating ipsec packet %d\n", ret);
2583 goto err;
2584 }
2585 /* restore ll */
2586 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2587 memcpy(eth, pkt_dev->hh, 12);
2588 *(u16 *) &eth[12] = protocol;
2589 }
2590 }
2591 return 1;
2592 err:
2593 kfree_skb(skb);
2594 return 0;
2595 }
2596 #endif
2597
2598 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2599 {
2600 unsigned i;
2601 for (i = 0; i < pkt_dev->nr_labels; i++)
2602 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2603
2604 mpls--;
2605 *mpls |= MPLS_STACK_BOTTOM;
2606 }
2607
2608 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2609 unsigned int prio)
2610 {
2611 return htons(id | (cfi << 12) | (prio << 13));
2612 }
2613
2614 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2615 int datalen)
2616 {
2617 struct timeval timestamp;
2618 struct pktgen_hdr *pgh;
2619
2620 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
2621 datalen -= sizeof(*pgh);
2622
2623 if (pkt_dev->nfrags <= 0) {
2624 memset(skb_put(skb, datalen), 0, datalen);
2625 } else {
2626 int frags = pkt_dev->nfrags;
2627 int i, len;
2628
2629
2630 if (frags > MAX_SKB_FRAGS)
2631 frags = MAX_SKB_FRAGS;
2632 len = datalen - frags * PAGE_SIZE;
2633 if (len > 0) {
2634 memset(skb_put(skb, len), 0, len);
2635 datalen = frags * PAGE_SIZE;
2636 }
2637
2638 i = 0;
2639 while (datalen > 0) {
2640 if (unlikely(!pkt_dev->page)) {
2641 int node = numa_node_id();
2642
2643 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2644 node = pkt_dev->node;
2645 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2646 if (!pkt_dev->page)
2647 break;
2648 }
2649 skb_shinfo(skb)->frags[i].page = pkt_dev->page;
2650 get_page(pkt_dev->page);
2651 skb_shinfo(skb)->frags[i].page_offset = 0;
2652 skb_shinfo(skb)->frags[i].size =
2653 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2654 datalen -= skb_shinfo(skb)->frags[i].size;
2655 skb->len += skb_shinfo(skb)->frags[i].size;
2656 skb->data_len += skb_shinfo(skb)->frags[i].size;
2657 i++;
2658 skb_shinfo(skb)->nr_frags = i;
2659 }
2660
2661 while (i < frags) {
2662 int rem;
2663
2664 if (i == 0)
2665 break;
2666
2667 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2668 if (rem == 0)
2669 break;
2670
2671 skb_shinfo(skb)->frags[i - 1].size -= rem;
2672
2673 skb_shinfo(skb)->frags[i] =
2674 skb_shinfo(skb)->frags[i - 1];
2675 get_page(skb_shinfo(skb)->frags[i].page);
2676 skb_shinfo(skb)->frags[i].page =
2677 skb_shinfo(skb)->frags[i - 1].page;
2678 skb_shinfo(skb)->frags[i].page_offset +=
2679 skb_shinfo(skb)->frags[i - 1].size;
2680 skb_shinfo(skb)->frags[i].size = rem;
2681 i++;
2682 skb_shinfo(skb)->nr_frags = i;
2683 }
2684 }
2685
2686 /* Stamp the time, and sequence number,
2687 * convert them to network byte order
2688 */
2689 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2690 pgh->seq_num = htonl(pkt_dev->seq_num);
2691
2692 do_gettimeofday(&timestamp);
2693 pgh->tv_sec = htonl(timestamp.tv_sec);
2694 pgh->tv_usec = htonl(timestamp.tv_usec);
2695 }
2696
2697 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2698 struct pktgen_dev *pkt_dev)
2699 {
2700 struct sk_buff *skb = NULL;
2701 __u8 *eth;
2702 struct udphdr *udph;
2703 int datalen, iplen;
2704 struct iphdr *iph;
2705 __be16 protocol = htons(ETH_P_IP);
2706 __be32 *mpls;
2707 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2708 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2709 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2710 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2711 u16 queue_map;
2712
2713 if (pkt_dev->nr_labels)
2714 protocol = htons(ETH_P_MPLS_UC);
2715
2716 if (pkt_dev->vlan_id != 0xffff)
2717 protocol = htons(ETH_P_8021Q);
2718
2719 /* Update any of the values, used when we're incrementing various
2720 * fields.
2721 */
2722 mod_cur_headers(pkt_dev);
2723 queue_map = pkt_dev->cur_queue_map;
2724
2725 datalen = (odev->hard_header_len + 16) & ~0xf;
2726
2727 if (pkt_dev->flags & F_NODE) {
2728 int node;
2729
2730 if (pkt_dev->node >= 0)
2731 node = pkt_dev->node;
2732 else
2733 node = numa_node_id();
2734
2735 skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64
2736 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node);
2737 if (likely(skb)) {
2738 skb_reserve(skb, NET_SKB_PAD);
2739 skb->dev = odev;
2740 }
2741 }
2742 else
2743 skb = __netdev_alloc_skb(odev,
2744 pkt_dev->cur_pkt_size + 64
2745 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2746
2747 if (!skb) {
2748 sprintf(pkt_dev->result, "No memory");
2749 return NULL;
2750 }
2751 prefetchw(skb->data);
2752
2753 skb_reserve(skb, datalen);
2754
2755 /* Reserve for ethernet and IP header */
2756 eth = (__u8 *) skb_push(skb, 14);
2757 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2758 if (pkt_dev->nr_labels)
2759 mpls_push(mpls, pkt_dev);
2760
2761 if (pkt_dev->vlan_id != 0xffff) {
2762 if (pkt_dev->svlan_id != 0xffff) {
2763 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2764 *svlan_tci = build_tci(pkt_dev->svlan_id,
2765 pkt_dev->svlan_cfi,
2766 pkt_dev->svlan_p);
2767 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2768 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2769 }
2770 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2771 *vlan_tci = build_tci(pkt_dev->vlan_id,
2772 pkt_dev->vlan_cfi,
2773 pkt_dev->vlan_p);
2774 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2775 *vlan_encapsulated_proto = htons(ETH_P_IP);
2776 }
2777
2778 skb->network_header = skb->tail;
2779 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2780 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2781 skb_set_queue_mapping(skb, queue_map);
2782 skb->priority = pkt_dev->skb_priority;
2783
2784 iph = ip_hdr(skb);
2785 udph = udp_hdr(skb);
2786
2787 memcpy(eth, pkt_dev->hh, 12);
2788 *(__be16 *) & eth[12] = protocol;
2789
2790 /* Eth + IPh + UDPh + mpls */
2791 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2792 pkt_dev->pkt_overhead;
2793 if (datalen < sizeof(struct pktgen_hdr))
2794 datalen = sizeof(struct pktgen_hdr);
2795
2796 udph->source = htons(pkt_dev->cur_udp_src);
2797 udph->dest = htons(pkt_dev->cur_udp_dst);
2798 udph->len = htons(datalen + 8); /* DATA + udphdr */
2799 udph->check = 0; /* No checksum */
2800
2801 iph->ihl = 5;
2802 iph->version = 4;
2803 iph->ttl = 32;
2804 iph->tos = pkt_dev->tos;
2805 iph->protocol = IPPROTO_UDP; /* UDP */
2806 iph->saddr = pkt_dev->cur_saddr;
2807 iph->daddr = pkt_dev->cur_daddr;
2808 iph->id = htons(pkt_dev->ip_id);
2809 pkt_dev->ip_id++;
2810 iph->frag_off = 0;
2811 iplen = 20 + 8 + datalen;
2812 iph->tot_len = htons(iplen);
2813 iph->check = 0;
2814 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2815 skb->protocol = protocol;
2816 skb->mac_header = (skb->network_header - ETH_HLEN -
2817 pkt_dev->pkt_overhead);
2818 skb->dev = odev;
2819 skb->pkt_type = PACKET_HOST;
2820 pktgen_finalize_skb(pkt_dev, skb, datalen);
2821
2822 #ifdef CONFIG_XFRM
2823 if (!process_ipsec(pkt_dev, skb, protocol))
2824 return NULL;
2825 #endif
2826
2827 return skb;
2828 }
2829
2830 /*
2831 * scan_ip6, fmt_ip taken from dietlibc-0.21
2832 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2833 *
2834 * Slightly modified for kernel.
2835 * Should be candidate for net/ipv4/utils.c
2836 * --ro
2837 */
2838
2839 static unsigned int scan_ip6(const char *s, char ip[16])
2840 {
2841 unsigned int i;
2842 unsigned int len = 0;
2843 unsigned long u;
2844 char suffix[16];
2845 unsigned int prefixlen = 0;
2846 unsigned int suffixlen = 0;
2847 __be32 tmp;
2848 char *pos;
2849
2850 for (i = 0; i < 16; i++)
2851 ip[i] = 0;
2852
2853 for (;;) {
2854 if (*s == ':') {
2855 len++;
2856 if (s[1] == ':') { /* Found "::", skip to part 2 */
2857 s += 2;
2858 len++;
2859 break;
2860 }
2861 s++;
2862 }
2863
2864 u = simple_strtoul(s, &pos, 16);
2865 i = pos - s;
2866 if (!i)
2867 return 0;
2868 if (prefixlen == 12 && s[i] == '.') {
2869
2870 /* the last 4 bytes may be written as IPv4 address */
2871
2872 tmp = in_aton(s);
2873 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2874 return i + len;
2875 }
2876 ip[prefixlen++] = (u >> 8);
2877 ip[prefixlen++] = (u & 255);
2878 s += i;
2879 len += i;
2880 if (prefixlen == 16)
2881 return len;
2882 }
2883
2884 /* part 2, after "::" */
2885 for (;;) {
2886 if (*s == ':') {
2887 if (suffixlen == 0)
2888 break;
2889 s++;
2890 len++;
2891 } else if (suffixlen != 0)
2892 break;
2893
2894 u = simple_strtol(s, &pos, 16);
2895 i = pos - s;
2896 if (!i) {
2897 if (*s)
2898 len--;
2899 break;
2900 }
2901 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2902 tmp = in_aton(s);
2903 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2904 sizeof(tmp));
2905 suffixlen += 4;
2906 len += strlen(s);
2907 break;
2908 }
2909 suffix[suffixlen++] = (u >> 8);
2910 suffix[suffixlen++] = (u & 255);
2911 s += i;
2912 len += i;
2913 if (prefixlen + suffixlen == 16)
2914 break;
2915 }
2916 for (i = 0; i < suffixlen; i++)
2917 ip[16 - suffixlen + i] = suffix[i];
2918 return len;
2919 }
2920
2921 static char tohex(char hexdigit)
2922 {
2923 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2924 }
2925
2926 static int fmt_xlong(char *s, unsigned int i)
2927 {
2928 char *bak = s;
2929 *s = tohex((i >> 12) & 0xf);
2930 if (s != bak || *s != '0')
2931 ++s;
2932 *s = tohex((i >> 8) & 0xf);
2933 if (s != bak || *s != '0')
2934 ++s;
2935 *s = tohex((i >> 4) & 0xf);
2936 if (s != bak || *s != '0')
2937 ++s;
2938 *s = tohex(i & 0xf);
2939 return s - bak + 1;
2940 }
2941
2942 static unsigned int fmt_ip6(char *s, const char ip[16])
2943 {
2944 unsigned int len;
2945 unsigned int i;
2946 unsigned int temp;
2947 unsigned int compressing;
2948 int j;
2949
2950 len = 0;
2951 compressing = 0;
2952 for (j = 0; j < 16; j += 2) {
2953
2954 #ifdef V4MAPPEDPREFIX
2955 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2956 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2957 temp = strlen(s);
2958 return len + temp;
2959 }
2960 #endif
2961 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2962 (unsigned long)(unsigned char)ip[j + 1];
2963 if (temp == 0) {
2964 if (!compressing) {
2965 compressing = 1;
2966 if (j == 0) {
2967 *s++ = ':';
2968 ++len;
2969 }
2970 }
2971 } else {
2972 if (compressing) {
2973 compressing = 0;
2974 *s++ = ':';
2975 ++len;
2976 }
2977 i = fmt_xlong(s, temp);
2978 len += i;
2979 s += i;
2980 if (j < 14) {
2981 *s++ = ':';
2982 ++len;
2983 }
2984 }
2985 }
2986 if (compressing) {
2987 *s++ = ':';
2988 ++len;
2989 }
2990 *s = 0;
2991 return len;
2992 }
2993
2994 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2995 struct pktgen_dev *pkt_dev)
2996 {
2997 struct sk_buff *skb = NULL;
2998 __u8 *eth;
2999 struct udphdr *udph;
3000 int datalen;
3001 struct ipv6hdr *iph;
3002 __be16 protocol = htons(ETH_P_IPV6);
3003 __be32 *mpls;
3004 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
3005 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
3006 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
3007 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
3008 u16 queue_map;
3009
3010 if (pkt_dev->nr_labels)
3011 protocol = htons(ETH_P_MPLS_UC);
3012
3013 if (pkt_dev->vlan_id != 0xffff)
3014 protocol = htons(ETH_P_8021Q);
3015
3016 /* Update any of the values, used when we're incrementing various
3017 * fields.
3018 */
3019 mod_cur_headers(pkt_dev);
3020 queue_map = pkt_dev->cur_queue_map;
3021
3022 skb = __netdev_alloc_skb(odev,
3023 pkt_dev->cur_pkt_size + 64
3024 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
3025 if (!skb) {
3026 sprintf(pkt_dev->result, "No memory");
3027 return NULL;
3028 }
3029 prefetchw(skb->data);
3030
3031 skb_reserve(skb, 16);
3032
3033 /* Reserve for ethernet and IP header */
3034 eth = (__u8 *) skb_push(skb, 14);
3035 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
3036 if (pkt_dev->nr_labels)
3037 mpls_push(mpls, pkt_dev);
3038
3039 if (pkt_dev->vlan_id != 0xffff) {
3040 if (pkt_dev->svlan_id != 0xffff) {
3041 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
3042 *svlan_tci = build_tci(pkt_dev->svlan_id,
3043 pkt_dev->svlan_cfi,
3044 pkt_dev->svlan_p);
3045 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
3046 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
3047 }
3048 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
3049 *vlan_tci = build_tci(pkt_dev->vlan_id,
3050 pkt_dev->vlan_cfi,
3051 pkt_dev->vlan_p);
3052 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
3053 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
3054 }
3055
3056 skb->network_header = skb->tail;
3057 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
3058 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
3059 skb_set_queue_mapping(skb, queue_map);
3060 skb->priority = pkt_dev->skb_priority;
3061 iph = ipv6_hdr(skb);
3062 udph = udp_hdr(skb);
3063
3064 memcpy(eth, pkt_dev->hh, 12);
3065 *(__be16 *) &eth[12] = protocol;
3066
3067 /* Eth + IPh + UDPh + mpls */
3068 datalen = pkt_dev->cur_pkt_size - 14 -
3069 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
3070 pkt_dev->pkt_overhead;
3071
3072 if (datalen < sizeof(struct pktgen_hdr)) {
3073 datalen = sizeof(struct pktgen_hdr);
3074 if (net_ratelimit())
3075 pr_info("increased datalen to %d\n", datalen);
3076 }
3077
3078 udph->source = htons(pkt_dev->cur_udp_src);
3079 udph->dest = htons(pkt_dev->cur_udp_dst);
3080 udph->len = htons(datalen + sizeof(struct udphdr));
3081 udph->check = 0; /* No checksum */
3082
3083 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
3084
3085 if (pkt_dev->traffic_class) {
3086 /* Version + traffic class + flow (0) */
3087 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
3088 }
3089
3090 iph->hop_limit = 32;
3091
3092 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
3093 iph->nexthdr = IPPROTO_UDP;
3094
3095 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
3096 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
3097
3098 skb->mac_header = (skb->network_header - ETH_HLEN -
3099 pkt_dev->pkt_overhead);
3100 skb->protocol = protocol;
3101 skb->dev = odev;
3102 skb->pkt_type = PACKET_HOST;
3103
3104 pktgen_finalize_skb(pkt_dev, skb, datalen);
3105
3106 return skb;
3107 }
3108
3109 static struct sk_buff *fill_packet(struct net_device *odev,
3110 struct pktgen_dev *pkt_dev)
3111 {
3112 if (pkt_dev->flags & F_IPV6)
3113 return fill_packet_ipv6(odev, pkt_dev);
3114 else
3115 return fill_packet_ipv4(odev, pkt_dev);
3116 }
3117
3118 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3119 {
3120 pkt_dev->seq_num = 1;
3121 pkt_dev->idle_acc = 0;
3122 pkt_dev->sofar = 0;
3123 pkt_dev->tx_bytes = 0;
3124 pkt_dev->errors = 0;
3125 }
3126
3127 /* Set up structure for sending pkts, clear counters */
3128
3129 static void pktgen_run(struct pktgen_thread *t)
3130 {
3131 struct pktgen_dev *pkt_dev;
3132 int started = 0;
3133
3134 func_enter();
3135
3136 if_lock(t);
3137 list_for_each_entry(pkt_dev, &t->if_list, list) {
3138
3139 /*
3140 * setup odev and create initial packet.
3141 */
3142 pktgen_setup_inject(pkt_dev);
3143
3144 if (pkt_dev->odev) {
3145 pktgen_clear_counters(pkt_dev);
3146 pkt_dev->running = 1; /* Cranke yeself! */
3147 pkt_dev->skb = NULL;
3148 pkt_dev->started_at =
3149 pkt_dev->next_tx = ktime_now();
3150
3151 set_pkt_overhead(pkt_dev);
3152
3153 strcpy(pkt_dev->result, "Starting");
3154 started++;
3155 } else
3156 strcpy(pkt_dev->result, "Error starting");
3157 }
3158 if_unlock(t);
3159 if (started)
3160 t->control &= ~(T_STOP);
3161 }
3162
3163 static void pktgen_stop_all_threads_ifs(void)
3164 {
3165 struct pktgen_thread *t;
3166
3167 func_enter();
3168
3169 mutex_lock(&pktgen_thread_lock);
3170
3171 list_for_each_entry(t, &pktgen_threads, th_list)
3172 t->control |= T_STOP;
3173
3174 mutex_unlock(&pktgen_thread_lock);
3175 }
3176
3177 static int thread_is_running(const struct pktgen_thread *t)
3178 {
3179 const struct pktgen_dev *pkt_dev;
3180
3181 list_for_each_entry(pkt_dev, &t->if_list, list)
3182 if (pkt_dev->running)
3183 return 1;
3184 return 0;
3185 }
3186
3187 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3188 {
3189 if_lock(t);
3190
3191 while (thread_is_running(t)) {
3192
3193 if_unlock(t);
3194
3195 msleep_interruptible(100);
3196
3197 if (signal_pending(current))
3198 goto signal;
3199 if_lock(t);
3200 }
3201 if_unlock(t);
3202 return 1;
3203 signal:
3204 return 0;
3205 }
3206
3207 static int pktgen_wait_all_threads_run(void)
3208 {
3209 struct pktgen_thread *t;
3210 int sig = 1;
3211
3212 mutex_lock(&pktgen_thread_lock);
3213
3214 list_for_each_entry(t, &pktgen_threads, th_list) {
3215 sig = pktgen_wait_thread_run(t);
3216 if (sig == 0)
3217 break;
3218 }
3219
3220 if (sig == 0)
3221 list_for_each_entry(t, &pktgen_threads, th_list)
3222 t->control |= (T_STOP);
3223
3224 mutex_unlock(&pktgen_thread_lock);
3225 return sig;
3226 }
3227
3228 static void pktgen_run_all_threads(void)
3229 {
3230 struct pktgen_thread *t;
3231
3232 func_enter();
3233
3234 mutex_lock(&pktgen_thread_lock);
3235
3236 list_for_each_entry(t, &pktgen_threads, th_list)
3237 t->control |= (T_RUN);
3238
3239 mutex_unlock(&pktgen_thread_lock);
3240
3241 /* Propagate thread->control */
3242 schedule_timeout_interruptible(msecs_to_jiffies(125));
3243
3244 pktgen_wait_all_threads_run();
3245 }
3246
3247 static void pktgen_reset_all_threads(void)
3248 {
3249 struct pktgen_thread *t;
3250
3251 func_enter();
3252
3253 mutex_lock(&pktgen_thread_lock);
3254
3255 list_for_each_entry(t, &pktgen_threads, th_list)
3256 t->control |= (T_REMDEVALL);
3257
3258 mutex_unlock(&pktgen_thread_lock);
3259
3260 /* Propagate thread->control */
3261 schedule_timeout_interruptible(msecs_to_jiffies(125));
3262
3263 pktgen_wait_all_threads_run();
3264 }
3265
3266 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3267 {
3268 __u64 bps, mbps, pps;
3269 char *p = pkt_dev->result;
3270 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3271 pkt_dev->started_at);
3272 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3273
3274 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3275 (unsigned long long)ktime_to_us(elapsed),
3276 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3277 (unsigned long long)ktime_to_us(idle),
3278 (unsigned long long)pkt_dev->sofar,
3279 pkt_dev->cur_pkt_size, nr_frags);
3280
3281 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3282 ktime_to_ns(elapsed));
3283
3284 bps = pps * 8 * pkt_dev->cur_pkt_size;
3285
3286 mbps = bps;
3287 do_div(mbps, 1000000);
3288 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3289 (unsigned long long)pps,
3290 (unsigned long long)mbps,
3291 (unsigned long long)bps,
3292 (unsigned long long)pkt_dev->errors);
3293 }
3294
3295 /* Set stopped-at timer, remove from running list, do counters & statistics */
3296 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3297 {
3298 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3299
3300 if (!pkt_dev->running) {
3301 pr_warning("interface: %s is already stopped\n",
3302 pkt_dev->odevname);
3303 return -EINVAL;
3304 }
3305
3306 kfree_skb(pkt_dev->skb);
3307 pkt_dev->skb = NULL;
3308 pkt_dev->stopped_at = ktime_now();
3309 pkt_dev->running = 0;
3310
3311 show_results(pkt_dev, nr_frags);
3312
3313 return 0;
3314 }
3315
3316 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3317 {
3318 struct pktgen_dev *pkt_dev, *best = NULL;
3319
3320 if_lock(t);
3321
3322 list_for_each_entry(pkt_dev, &t->if_list, list) {
3323 if (!pkt_dev->running)
3324 continue;
3325 if (best == NULL)
3326 best = pkt_dev;
3327 else if (ktime_lt(pkt_dev->next_tx, best->next_tx))
3328 best = pkt_dev;
3329 }
3330 if_unlock(t);
3331 return best;
3332 }
3333
3334 static void pktgen_stop(struct pktgen_thread *t)
3335 {
3336 struct pktgen_dev *pkt_dev;
3337
3338 func_enter();
3339
3340 if_lock(t);
3341
3342 list_for_each_entry(pkt_dev, &t->if_list, list) {
3343 pktgen_stop_device(pkt_dev);
3344 }
3345
3346 if_unlock(t);
3347 }
3348
3349 /*
3350 * one of our devices needs to be removed - find it
3351 * and remove it
3352 */
3353 static void pktgen_rem_one_if(struct pktgen_thread *t)
3354 {
3355 struct list_head *q, *n;
3356 struct pktgen_dev *cur;
3357
3358 func_enter();
3359
3360 if_lock(t);
3361
3362 list_for_each_safe(q, n, &t->if_list) {
3363 cur = list_entry(q, struct pktgen_dev, list);
3364
3365 if (!cur->removal_mark)
3366 continue;
3367
3368 kfree_skb(cur->skb);
3369 cur->skb = NULL;
3370
3371 pktgen_remove_device(t, cur);
3372
3373 break;
3374 }
3375
3376 if_unlock(t);
3377 }
3378
3379 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3380 {
3381 struct list_head *q, *n;
3382 struct pktgen_dev *cur;
3383
3384 func_enter();
3385
3386 /* Remove all devices, free mem */
3387
3388 if_lock(t);
3389
3390 list_for_each_safe(q, n, &t->if_list) {
3391 cur = list_entry(q, struct pktgen_dev, list);
3392
3393 kfree_skb(cur->skb);
3394 cur->skb = NULL;
3395
3396 pktgen_remove_device(t, cur);
3397 }
3398
3399 if_unlock(t);
3400 }
3401
3402 static void pktgen_rem_thread(struct pktgen_thread *t)
3403 {
3404 /* Remove from the thread list */
3405
3406 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3407
3408 }
3409
3410 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3411 {
3412 ktime_t idle_start = ktime_now();
3413 schedule();
3414 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3415 }
3416
3417 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3418 {
3419 ktime_t idle_start = ktime_now();
3420
3421 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3422 if (signal_pending(current))
3423 break;
3424
3425 if (need_resched())
3426 pktgen_resched(pkt_dev);
3427 else
3428 cpu_relax();
3429 }
3430 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3431 }
3432
3433 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3434 {
3435 struct net_device *odev = pkt_dev->odev;
3436 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3437 = odev->netdev_ops->ndo_start_xmit;
3438 struct netdev_queue *txq;
3439 u16 queue_map;
3440 int ret;
3441
3442 /* If device is offline, then don't send */
3443 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3444 pktgen_stop_device(pkt_dev);
3445 return;
3446 }
3447
3448 /* This is max DELAY, this has special meaning of
3449 * "never transmit"
3450 */
3451 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3452 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX);
3453 return;
3454 }
3455
3456 /* If no skb or clone count exhausted then get new one */
3457 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3458 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3459 /* build a new pkt */
3460 kfree_skb(pkt_dev->skb);
3461
3462 pkt_dev->skb = fill_packet(odev, pkt_dev);
3463 if (pkt_dev->skb == NULL) {
3464 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3465 schedule();
3466 pkt_dev->clone_count--; /* back out increment, OOM */
3467 return;
3468 }
3469 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3470 pkt_dev->allocated_skbs++;
3471 pkt_dev->clone_count = 0; /* reset counter */
3472 }
3473
3474 if (pkt_dev->delay && pkt_dev->last_ok)
3475 spin(pkt_dev, pkt_dev->next_tx);
3476
3477 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3478 txq = netdev_get_tx_queue(odev, queue_map);
3479
3480 __netif_tx_lock_bh(txq);
3481
3482 if (unlikely(netif_tx_queue_frozen_or_stopped(txq))) {
3483 ret = NETDEV_TX_BUSY;
3484 pkt_dev->last_ok = 0;
3485 goto unlock;
3486 }
3487 atomic_inc(&(pkt_dev->skb->users));
3488 ret = (*xmit)(pkt_dev->skb, odev);
3489
3490 switch (ret) {
3491 case NETDEV_TX_OK:
3492 txq_trans_update(txq);
3493 pkt_dev->last_ok = 1;
3494 pkt_dev->sofar++;
3495 pkt_dev->seq_num++;
3496 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3497 break;
3498 case NET_XMIT_DROP:
3499 case NET_XMIT_CN:
3500 case NET_XMIT_POLICED:
3501 /* skb has been consumed */
3502 pkt_dev->errors++;
3503 break;
3504 default: /* Drivers are not supposed to return other values! */
3505 if (net_ratelimit())
3506 pr_info("%s xmit error: %d\n", pkt_dev->odevname, ret);
3507 pkt_dev->errors++;
3508 /* fallthru */
3509 case NETDEV_TX_LOCKED:
3510 case NETDEV_TX_BUSY:
3511 /* Retry it next time */
3512 atomic_dec(&(pkt_dev->skb->users));
3513 pkt_dev->last_ok = 0;
3514 }
3515 unlock:
3516 __netif_tx_unlock_bh(txq);
3517
3518 /* If pkt_dev->count is zero, then run forever */
3519 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3520 pktgen_wait_for_skb(pkt_dev);
3521
3522 /* Done with this */
3523 pktgen_stop_device(pkt_dev);
3524 }
3525 }
3526
3527 /*
3528 * Main loop of the thread goes here
3529 */
3530
3531 static int pktgen_thread_worker(void *arg)
3532 {
3533 DEFINE_WAIT(wait);
3534 struct pktgen_thread *t = arg;
3535 struct pktgen_dev *pkt_dev = NULL;
3536 int cpu = t->cpu;
3537
3538 BUG_ON(smp_processor_id() != cpu);
3539
3540 init_waitqueue_head(&t->queue);
3541 complete(&t->start_done);
3542
3543 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3544
3545 set_current_state(TASK_INTERRUPTIBLE);
3546
3547 set_freezable();
3548
3549 while (!kthread_should_stop()) {
3550 pkt_dev = next_to_run(t);
3551
3552 if (unlikely(!pkt_dev && t->control == 0)) {
3553 if (pktgen_exiting)
3554 break;
3555 wait_event_interruptible_timeout(t->queue,
3556 t->control != 0,
3557 HZ/10);
3558 try_to_freeze();
3559 continue;
3560 }
3561
3562 __set_current_state(TASK_RUNNING);
3563
3564 if (likely(pkt_dev)) {
3565 pktgen_xmit(pkt_dev);
3566
3567 if (need_resched())
3568 pktgen_resched(pkt_dev);
3569 else
3570 cpu_relax();
3571 }
3572
3573 if (t->control & T_STOP) {
3574 pktgen_stop(t);
3575 t->control &= ~(T_STOP);
3576 }
3577
3578 if (t->control & T_RUN) {
3579 pktgen_run(t);
3580 t->control &= ~(T_RUN);
3581 }
3582
3583 if (t->control & T_REMDEVALL) {
3584 pktgen_rem_all_ifs(t);
3585 t->control &= ~(T_REMDEVALL);
3586 }
3587
3588 if (t->control & T_REMDEV) {
3589 pktgen_rem_one_if(t);
3590 t->control &= ~(T_REMDEV);
3591 }
3592
3593 try_to_freeze();
3594
3595 set_current_state(TASK_INTERRUPTIBLE);
3596 }
3597
3598 pr_debug("%s stopping all device\n", t->tsk->comm);
3599 pktgen_stop(t);
3600
3601 pr_debug("%s removing all device\n", t->tsk->comm);
3602 pktgen_rem_all_ifs(t);
3603
3604 pr_debug("%s removing thread\n", t->tsk->comm);
3605 pktgen_rem_thread(t);
3606
3607 /* Wait for kthread_stop */
3608 while (!kthread_should_stop()) {
3609 set_current_state(TASK_INTERRUPTIBLE);
3610 schedule();
3611 }
3612 __set_current_state(TASK_RUNNING);
3613
3614 return 0;
3615 }
3616
3617 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3618 const char *ifname, bool exact)
3619 {
3620 struct pktgen_dev *p, *pkt_dev = NULL;
3621 size_t len = strlen(ifname);
3622
3623 if_lock(t);
3624 list_for_each_entry(p, &t->if_list, list)
3625 if (strncmp(p->odevname, ifname, len) == 0) {
3626 if (p->odevname[len]) {
3627 if (exact || p->odevname[len] != '@')
3628 continue;
3629 }
3630 pkt_dev = p;
3631 break;
3632 }
3633
3634 if_unlock(t);
3635 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3636 return pkt_dev;
3637 }
3638
3639 /*
3640 * Adds a dev at front of if_list.
3641 */
3642
3643 static int add_dev_to_thread(struct pktgen_thread *t,
3644 struct pktgen_dev *pkt_dev)
3645 {
3646 int rv = 0;
3647
3648 if_lock(t);
3649
3650 if (pkt_dev->pg_thread) {
3651 pr_err("ERROR: already assigned to a thread\n");
3652 rv = -EBUSY;
3653 goto out;
3654 }
3655
3656 list_add(&pkt_dev->list, &t->if_list);
3657 pkt_dev->pg_thread = t;
3658 pkt_dev->running = 0;
3659
3660 out:
3661 if_unlock(t);
3662 return rv;
3663 }
3664
3665 /* Called under thread lock */
3666
3667 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3668 {
3669 struct pktgen_dev *pkt_dev;
3670 int err;
3671 int node = cpu_to_node(t->cpu);
3672
3673 /* We don't allow a device to be on several threads */
3674
3675 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3676 if (pkt_dev) {
3677 pr_err("ERROR: interface already used\n");
3678 return -EBUSY;
3679 }
3680
3681 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3682 if (!pkt_dev)
3683 return -ENOMEM;
3684
3685 strcpy(pkt_dev->odevname, ifname);
3686 pkt_dev->flows = vmalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3687 node);
3688 if (pkt_dev->flows == NULL) {
3689 kfree(pkt_dev);
3690 return -ENOMEM;
3691 }
3692 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3693
3694 pkt_dev->removal_mark = 0;
3695 pkt_dev->min_pkt_size = ETH_ZLEN;
3696 pkt_dev->max_pkt_size = ETH_ZLEN;
3697 pkt_dev->nfrags = 0;
3698 pkt_dev->clone_skb = pg_clone_skb_d;
3699 pkt_dev->delay = pg_delay_d;
3700 pkt_dev->count = pg_count_d;
3701 pkt_dev->sofar = 0;
3702 pkt_dev->udp_src_min = 9; /* sink port */
3703 pkt_dev->udp_src_max = 9;
3704 pkt_dev->udp_dst_min = 9;
3705 pkt_dev->udp_dst_max = 9;
3706
3707 pkt_dev->vlan_p = 0;
3708 pkt_dev->vlan_cfi = 0;
3709 pkt_dev->vlan_id = 0xffff;
3710 pkt_dev->svlan_p = 0;
3711 pkt_dev->svlan_cfi = 0;
3712 pkt_dev->svlan_id = 0xffff;
3713 pkt_dev->node = -1;
3714
3715 err = pktgen_setup_dev(pkt_dev, ifname);
3716 if (err)
3717 goto out1;
3718
3719 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3720 &pktgen_if_fops, pkt_dev);
3721 if (!pkt_dev->entry) {
3722 pr_err("cannot create %s/%s procfs entry\n",
3723 PG_PROC_DIR, ifname);
3724 err = -EINVAL;
3725 goto out2;
3726 }
3727 #ifdef CONFIG_XFRM
3728 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3729 pkt_dev->ipsproto = IPPROTO_ESP;
3730 #endif
3731
3732 return add_dev_to_thread(t, pkt_dev);
3733 out2:
3734 dev_put(pkt_dev->odev);
3735 out1:
3736 #ifdef CONFIG_XFRM
3737 free_SAs(pkt_dev);
3738 #endif
3739 vfree(pkt_dev->flows);
3740 kfree(pkt_dev);
3741 return err;
3742 }
3743
3744 static int __init pktgen_create_thread(int cpu)
3745 {
3746 struct pktgen_thread *t;
3747 struct proc_dir_entry *pe;
3748 struct task_struct *p;
3749
3750 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3751 cpu_to_node(cpu));
3752 if (!t) {
3753 pr_err("ERROR: out of memory, can't create new thread\n");
3754 return -ENOMEM;
3755 }
3756
3757 spin_lock_init(&t->if_lock);
3758 t->cpu = cpu;
3759
3760 INIT_LIST_HEAD(&t->if_list);
3761
3762 list_add_tail(&t->th_list, &pktgen_threads);
3763 init_completion(&t->start_done);
3764
3765 p = kthread_create_on_node(pktgen_thread_worker,
3766 t,
3767 cpu_to_node(cpu),
3768 "kpktgend_%d", cpu);
3769 if (IS_ERR(p)) {
3770 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3771 list_del(&t->th_list);
3772 kfree(t);
3773 return PTR_ERR(p);
3774 }
3775 kthread_bind(p, cpu);
3776 t->tsk = p;
3777
3778 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3779 &pktgen_thread_fops, t);
3780 if (!pe) {
3781 pr_err("cannot create %s/%s procfs entry\n",
3782 PG_PROC_DIR, t->tsk->comm);
3783 kthread_stop(p);
3784 list_del(&t->th_list);
3785 kfree(t);
3786 return -EINVAL;
3787 }
3788
3789 wake_up_process(p);
3790 wait_for_completion(&t->start_done);
3791
3792 return 0;
3793 }
3794
3795 /*
3796 * Removes a device from the thread if_list.
3797 */
3798 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3799 struct pktgen_dev *pkt_dev)
3800 {
3801 struct list_head *q, *n;
3802 struct pktgen_dev *p;
3803
3804 list_for_each_safe(q, n, &t->if_list) {
3805 p = list_entry(q, struct pktgen_dev, list);
3806 if (p == pkt_dev)
3807 list_del(&p->list);
3808 }
3809 }
3810
3811 static int pktgen_remove_device(struct pktgen_thread *t,
3812 struct pktgen_dev *pkt_dev)
3813 {
3814
3815 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3816
3817 if (pkt_dev->running) {
3818 pr_warning("WARNING: trying to remove a running interface, stopping it now\n");
3819 pktgen_stop_device(pkt_dev);
3820 }
3821
3822 /* Dis-associate from the interface */
3823
3824 if (pkt_dev->odev) {
3825 dev_put(pkt_dev->odev);
3826 pkt_dev->odev = NULL;
3827 }
3828
3829 /* And update the thread if_list */
3830
3831 _rem_dev_from_if_list(t, pkt_dev);
3832
3833 if (pkt_dev->entry)
3834 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3835
3836 #ifdef CONFIG_XFRM
3837 free_SAs(pkt_dev);
3838 #endif
3839 vfree(pkt_dev->flows);
3840 if (pkt_dev->page)
3841 put_page(pkt_dev->page);
3842 kfree(pkt_dev);
3843 return 0;
3844 }
3845
3846 static int __init pg_init(void)
3847 {
3848 int cpu;
3849 struct proc_dir_entry *pe;
3850
3851 pr_info("%s", version);
3852
3853 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3854 if (!pg_proc_dir)
3855 return -ENODEV;
3856
3857 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3858 if (pe == NULL) {
3859 pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL);
3860 proc_net_remove(&init_net, PG_PROC_DIR);
3861 return -EINVAL;
3862 }
3863
3864 /* Register us to receive netdevice events */
3865 register_netdevice_notifier(&pktgen_notifier_block);
3866
3867 for_each_online_cpu(cpu) {
3868 int err;
3869
3870 err = pktgen_create_thread(cpu);
3871 if (err)
3872 pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n",
3873 cpu, err);
3874 }
3875
3876 if (list_empty(&pktgen_threads)) {
3877 pr_err("ERROR: Initialization failed for all threads\n");
3878 unregister_netdevice_notifier(&pktgen_notifier_block);
3879 remove_proc_entry(PGCTRL, pg_proc_dir);
3880 proc_net_remove(&init_net, PG_PROC_DIR);
3881 return -ENODEV;
3882 }
3883
3884 return 0;
3885 }
3886
3887 static void __exit pg_cleanup(void)
3888 {
3889 struct pktgen_thread *t;
3890 struct list_head *q, *n;
3891
3892 /* Stop all interfaces & threads */
3893 pktgen_exiting = true;
3894
3895 list_for_each_safe(q, n, &pktgen_threads) {
3896 t = list_entry(q, struct pktgen_thread, th_list);
3897 kthread_stop(t->tsk);
3898 kfree(t);
3899 }
3900
3901 /* Un-register us from receiving netdevice events */
3902 unregister_netdevice_notifier(&pktgen_notifier_block);
3903
3904 /* Clean up proc file system */
3905 remove_proc_entry(PGCTRL, pg_proc_dir);
3906 proc_net_remove(&init_net, PG_PROC_DIR);
3907 }
3908
3909 module_init(pg_init);
3910 module_exit(pg_cleanup);
3911
3912 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3913 MODULE_DESCRIPTION("Packet Generator tool");
3914 MODULE_LICENSE("GPL");
3915 MODULE_VERSION(VERSION);
3916 module_param(pg_count_d, int, 0);
3917 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3918 module_param(pg_delay_d, int, 0);
3919 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3920 module_param(pg_clone_skb_d, int, 0);
3921 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3922 module_param(debug, int, 0);
3923 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
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