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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-btrfs-devel.git] / net / core / pktgen.c
blob0001c243b35cb4cc2aadebd72fd00679adc6e002
1 /*
2 * Authors:
3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
4 * Uppsala University and
5 * Swedish University of Agricultural Sciences
6 *
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 * Ben Greear <greearb@candelatech.com>
9 * Jens Låås <jens.laas@data.slu.se>
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 *
16 *
17 * A tool for loading the network with preconfigurated packets.
18 * The tool is implemented as a linux module. Parameters are output
19 * device, delay (to hard_xmit), number of packets, and whether
20 * to use multiple SKBs or just the same one.
21 * pktgen uses the installed interface's output routine.
22 *
23 * Additional hacking by:
24 *
25 * Jens.Laas@data.slu.se
26 * Improved by ANK. 010120.
27 * Improved by ANK even more. 010212.
28 * MAC address typo fixed. 010417 --ro
29 * Integrated. 020301 --DaveM
30 * Added multiskb option 020301 --DaveM
31 * Scaling of results. 020417--sigurdur@linpro.no
32 * Significant re-work of the module:
33 * * Convert to threaded model to more efficiently be able to transmit
34 * and receive on multiple interfaces at once.
35 * * Converted many counters to __u64 to allow longer runs.
36 * * Allow configuration of ranges, like min/max IP address, MACs,
37 * and UDP-ports, for both source and destination, and can
38 * set to use a random distribution or sequentially walk the range.
39 * * Can now change most values after starting.
40 * * Place 12-byte packet in UDP payload with magic number,
41 * sequence number, and timestamp.
42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and
43 * latencies (with micro-second) precision.
44 * * Add IOCTL interface to easily get counters & configuration.
45 * --Ben Greear <greearb@candelatech.com>
46 *
47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
49 * as a "fastpath" with a configurable number of clones after alloc's.
50 * clone_skb=0 means all packets are allocated this also means ranges time
51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
52 * clones.
53 *
54 * Also moved to /proc/net/pktgen/
55 * --ro
56 *
57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
58 * mistakes. Also merged in DaveM's patch in the -pre6 patch.
59 * --Ben Greear <greearb@candelatech.com>
60 *
61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
62 *
63 *
64 * 021124 Finished major redesign and rewrite for new functionality.
65 * See Documentation/networking/pktgen.txt for how to use this.
66 *
67 * The new operation:
68 * For each CPU one thread/process is created at start. This process checks
69 * for running devices in the if_list and sends packets until count is 0 it
70 * also the thread checks the thread->control which is used for inter-process
71 * communication. controlling process "posts" operations to the threads this
72 * way. The if_lock should be possible to remove when add/rem_device is merged
73 * into this too.
74 *
75 * By design there should only be *one* "controlling" process. In practice
76 * multiple write accesses gives unpredictable result. Understood by "write"
77 * to /proc gives result code thats should be read be the "writer".
78 * For practical use this should be no problem.
79 *
80 * Note when adding devices to a specific CPU there good idea to also assign
81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
82 * --ro
83 *
84 * Fix refcount off by one if first packet fails, potential null deref,
85 * memleak 030710- KJP
86 *
87 * First "ranges" functionality for ipv6 030726 --ro
88 *
89 * Included flow support. 030802 ANK.
90 *
91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
92 *
93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
95 *
96 * New xmit() return, do_div and misc clean up by Stephen Hemminger
97 * <shemminger@osdl.org> 040923
98 *
99 * Randy Dunlap fixed u64 printk compiler waring
100 *
101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
103 *
104 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
106 *
107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
108 * 050103
109 *
110 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
111 *
112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
113 *
114 * Fixed src_mac command to set source mac of packet to value specified in
115 * command by Adit Ranadive <adit.262@gmail.com>
116 *
117 */
118
119 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
120
121 #include <linux/sys.h>
122 #include <linux/types.h>
123 #include <linux/module.h>
124 #include <linux/moduleparam.h>
125 #include <linux/kernel.h>
126 #include <linux/mutex.h>
127 #include <linux/sched.h>
128 #include <linux/slab.h>
129 #include <linux/vmalloc.h>
130 #include <linux/unistd.h>
131 #include <linux/string.h>
132 #include <linux/ptrace.h>
133 #include <linux/errno.h>
134 #include <linux/ioport.h>
135 #include <linux/interrupt.h>
136 #include <linux/capability.h>
137 #include <linux/hrtimer.h>
138 #include <linux/freezer.h>
139 #include <linux/delay.h>
140 #include <linux/timer.h>
141 #include <linux/list.h>
142 #include <linux/init.h>
143 #include <linux/skbuff.h>
144 #include <linux/netdevice.h>
145 #include <linux/inet.h>
146 #include <linux/inetdevice.h>
147 #include <linux/rtnetlink.h>
148 #include <linux/if_arp.h>
149 #include <linux/if_vlan.h>
150 #include <linux/in.h>
151 #include <linux/ip.h>
152 #include <linux/ipv6.h>
153 #include <linux/udp.h>
154 #include <linux/proc_fs.h>
155 #include <linux/seq_file.h>
156 #include <linux/wait.h>
157 #include <linux/etherdevice.h>
158 #include <linux/kthread.h>
159 #include <linux/prefetch.h>
160 #include <net/net_namespace.h>
161 #include <net/checksum.h>
162 #include <net/ipv6.h>
163 #include <net/addrconf.h>
164 #ifdef CONFIG_XFRM
165 #include <net/xfrm.h>
166 #endif
167 #include <asm/byteorder.h>
168 #include <linux/rcupdate.h>
169 #include <linux/bitops.h>
170 #include <linux/io.h>
171 #include <linux/timex.h>
172 #include <linux/uaccess.h>
173 #include <asm/dma.h>
174 #include <asm/div64.h> /* do_div */
175
176 #define VERSION "2.74"
177 #define IP_NAME_SZ 32
178 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
179 #define MPLS_STACK_BOTTOM htonl(0x00000100)
180
181 #define func_enter() pr_debug("entering %s\n", __func__);
182
183 /* Device flag bits */
184 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
185 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
186 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
187 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
188 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
189 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
190 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
191 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
192 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
193 #define F_VID_RND (1<<9) /* Random VLAN ID */
194 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
195 #define F_FLOW_SEQ (1<<11) /* Sequential flows */
196 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */
197 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
198 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
199 #define F_NODE (1<<15) /* Node memory alloc*/
200
201 /* Thread control flag bits */
202 #define T_STOP (1<<0) /* Stop run */
203 #define T_RUN (1<<1) /* Start run */
204 #define T_REMDEVALL (1<<2) /* Remove all devs */
205 #define T_REMDEV (1<<3) /* Remove one dev */
206
207 /* If lock -- can be removed after some work */
208 #define if_lock(t) spin_lock(&(t->if_lock));
209 #define if_unlock(t) spin_unlock(&(t->if_lock));
210
211 /* Used to help with determining the pkts on receive */
212 #define PKTGEN_MAGIC 0xbe9be955
213 #define PG_PROC_DIR "pktgen"
214 #define PGCTRL "pgctrl"
215 static struct proc_dir_entry *pg_proc_dir;
216
217 #define MAX_CFLOWS 65536
218
219 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
220 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
221
222 struct flow_state {
223 __be32 cur_daddr;
224 int count;
225 #ifdef CONFIG_XFRM
226 struct xfrm_state *x;
227 #endif
228 __u32 flags;
229 };
230
231 /* flow flag bits */
232 #define F_INIT (1<<0) /* flow has been initialized */
233
234 struct pktgen_dev {
235 /*
236 * Try to keep frequent/infrequent used vars. separated.
237 */
238 struct proc_dir_entry *entry; /* proc file */
239 struct pktgen_thread *pg_thread;/* the owner */
240 struct list_head list; /* chaining in the thread's run-queue */
241
242 int running; /* if false, the test will stop */
243
244 /* If min != max, then we will either do a linear iteration, or
245 * we will do a random selection from within the range.
246 */
247 __u32 flags;
248 int removal_mark; /* non-zero => the device is marked for
249 * removal by worker thread */
250
251 int min_pkt_size; /* = ETH_ZLEN; */
252 int max_pkt_size; /* = ETH_ZLEN; */
253 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
254 int nfrags;
255 struct page *page;
256 u64 delay; /* nano-seconds */
257
258 __u64 count; /* Default No packets to send */
259 __u64 sofar; /* How many pkts we've sent so far */
260 __u64 tx_bytes; /* How many bytes we've transmitted */
261 __u64 errors; /* Errors when trying to transmit, */
262
263 /* runtime counters relating to clone_skb */
264
265 __u64 allocated_skbs;
266 __u32 clone_count;
267 int last_ok; /* Was last skb sent?
268 * Or a failed transmit of some sort?
269 * This will keep sequence numbers in order
270 */
271 ktime_t next_tx;
272 ktime_t started_at;
273 ktime_t stopped_at;
274 u64 idle_acc; /* nano-seconds */
275
276 __u32 seq_num;
277
278 int clone_skb; /*
279 * Use multiple SKBs during packet gen.
280 * If this number is greater than 1, then
281 * that many copies of the same packet will be
282 * sent before a new packet is allocated.
283 * If you want to send 1024 identical packets
284 * before creating a new packet,
285 * set clone_skb to 1024.
286 */
287
288 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
289 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
290 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
291 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
292
293 struct in6_addr in6_saddr;
294 struct in6_addr in6_daddr;
295 struct in6_addr cur_in6_daddr;
296 struct in6_addr cur_in6_saddr;
297 /* For ranges */
298 struct in6_addr min_in6_daddr;
299 struct in6_addr max_in6_daddr;
300 struct in6_addr min_in6_saddr;
301 struct in6_addr max_in6_saddr;
302
303 /* If we're doing ranges, random or incremental, then this
304 * defines the min/max for those ranges.
305 */
306 __be32 saddr_min; /* inclusive, source IP address */
307 __be32 saddr_max; /* exclusive, source IP address */
308 __be32 daddr_min; /* inclusive, dest IP address */
309 __be32 daddr_max; /* exclusive, dest IP address */
310
311 __u16 udp_src_min; /* inclusive, source UDP port */
312 __u16 udp_src_max; /* exclusive, source UDP port */
313 __u16 udp_dst_min; /* inclusive, dest UDP port */
314 __u16 udp_dst_max; /* exclusive, dest UDP port */
315
316 /* DSCP + ECN */
317 __u8 tos; /* six MSB of (former) IPv4 TOS
318 are for dscp codepoint */
319 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
320 (see RFC 3260, sec. 4) */
321
322 /* MPLS */
323 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
324 __be32 labels[MAX_MPLS_LABELS];
325
326 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
327 __u8 vlan_p;
328 __u8 vlan_cfi;
329 __u16 vlan_id; /* 0xffff means no vlan tag */
330
331 __u8 svlan_p;
332 __u8 svlan_cfi;
333 __u16 svlan_id; /* 0xffff means no svlan tag */
334
335 __u32 src_mac_count; /* How many MACs to iterate through */
336 __u32 dst_mac_count; /* How many MACs to iterate through */
337
338 unsigned char dst_mac[ETH_ALEN];
339 unsigned char src_mac[ETH_ALEN];
340
341 __u32 cur_dst_mac_offset;
342 __u32 cur_src_mac_offset;
343 __be32 cur_saddr;
344 __be32 cur_daddr;
345 __u16 ip_id;
346 __u16 cur_udp_dst;
347 __u16 cur_udp_src;
348 __u16 cur_queue_map;
349 __u32 cur_pkt_size;
350 __u32 last_pkt_size;
351
352 __u8 hh[14];
353 /* = {
354 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
355
356 We fill in SRC address later
357 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
358 0x08, 0x00
359 };
360 */
361 __u16 pad; /* pad out the hh struct to an even 16 bytes */
362
363 struct sk_buff *skb; /* skb we are to transmit next, used for when we
364 * are transmitting the same one multiple times
365 */
366 struct net_device *odev; /* The out-going device.
367 * Note that the device should have it's
368 * pg_info pointer pointing back to this
369 * device.
370 * Set when the user specifies the out-going
371 * device name (not when the inject is
372 * started as it used to do.)
373 */
374 char odevname[32];
375 struct flow_state *flows;
376 unsigned cflows; /* Concurrent flows (config) */
377 unsigned lflow; /* Flow length (config) */
378 unsigned nflows; /* accumulated flows (stats) */
379 unsigned curfl; /* current sequenced flow (state)*/
380
381 u16 queue_map_min;
382 u16 queue_map_max;
383 __u32 skb_priority; /* skb priority field */
384 int node; /* Memory node */
385
386 #ifdef CONFIG_XFRM
387 __u8 ipsmode; /* IPSEC mode (config) */
388 __u8 ipsproto; /* IPSEC type (config) */
389 #endif
390 char result[512];
391 };
392
393 struct pktgen_hdr {
394 __be32 pgh_magic;
395 __be32 seq_num;
396 __be32 tv_sec;
397 __be32 tv_usec;
398 };
399
400 static bool pktgen_exiting __read_mostly;
401
402 struct pktgen_thread {
403 spinlock_t if_lock; /* for list of devices */
404 struct list_head if_list; /* All device here */
405 struct list_head th_list;
406 struct task_struct *tsk;
407 char result[512];
408
409 /* Field for thread to receive "posted" events terminate,
410 stop ifs etc. */
411
412 u32 control;
413 int cpu;
414
415 wait_queue_head_t queue;
416 struct completion start_done;
417 };
418
419 #define REMOVE 1
420 #define FIND 0
421
422 static inline ktime_t ktime_now(void)
423 {
424 struct timespec ts;
425 ktime_get_ts(&ts);
426
427 return timespec_to_ktime(ts);
428 }
429
430 /* This works even if 32 bit because of careful byte order choice */
431 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2)
432 {
433 return cmp1.tv64 < cmp2.tv64;
434 }
435
436 static const char version[] =
437 "Packet Generator for packet performance testing. "
438 "Version: " VERSION "\n";
439
440 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
441 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
442 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
443 const char *ifname, bool exact);
444 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
445 static void pktgen_run_all_threads(void);
446 static void pktgen_reset_all_threads(void);
447 static void pktgen_stop_all_threads_ifs(void);
448
449 static void pktgen_stop(struct pktgen_thread *t);
450 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
451
452 static unsigned int scan_ip6(const char *s, char ip[16]);
453
454 /* Module parameters, defaults. */
455 static int pg_count_d __read_mostly = 1000;
456 static int pg_delay_d __read_mostly;
457 static int pg_clone_skb_d __read_mostly;
458 static int debug __read_mostly;
459
460 static DEFINE_MUTEX(pktgen_thread_lock);
461 static LIST_HEAD(pktgen_threads);
462
463 static struct notifier_block pktgen_notifier_block = {
464 .notifier_call = pktgen_device_event,
465 };
466
467 /*
468 * /proc handling functions
469 *
470 */
471
472 static int pgctrl_show(struct seq_file *seq, void *v)
473 {
474 seq_puts(seq, version);
475 return 0;
476 }
477
478 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
479 size_t count, loff_t *ppos)
480 {
481 int err = 0;
482 char data[128];
483
484 if (!capable(CAP_NET_ADMIN)) {
485 err = -EPERM;
486 goto out;
487 }
488
489 if (count > sizeof(data))
490 count = sizeof(data);
491
492 if (copy_from_user(data, buf, count)) {
493 err = -EFAULT;
494 goto out;
495 }
496 data[count - 1] = 0; /* Make string */
497
498 if (!strcmp(data, "stop"))
499 pktgen_stop_all_threads_ifs();
500
501 else if (!strcmp(data, "start"))
502 pktgen_run_all_threads();
503
504 else if (!strcmp(data, "reset"))
505 pktgen_reset_all_threads();
506
507 else
508 pr_warning("Unknown command: %s\n", data);
509
510 err = count;
511
512 out:
513 return err;
514 }
515
516 static int pgctrl_open(struct inode *inode, struct file *file)
517 {
518 return single_open(file, pgctrl_show, PDE(inode)->data);
519 }
520
521 static const struct file_operations pktgen_fops = {
522 .owner = THIS_MODULE,
523 .open = pgctrl_open,
524 .read = seq_read,
525 .llseek = seq_lseek,
526 .write = pgctrl_write,
527 .release = single_release,
528 };
529
530 static int pktgen_if_show(struct seq_file *seq, void *v)
531 {
532 const struct pktgen_dev *pkt_dev = seq->private;
533 ktime_t stopped;
534 u64 idle;
535
536 seq_printf(seq,
537 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
538 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
539 pkt_dev->max_pkt_size);
540
541 seq_printf(seq,
542 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
543 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
544 pkt_dev->clone_skb, pkt_dev->odevname);
545
546 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
547 pkt_dev->lflow);
548
549 seq_printf(seq,
550 " queue_map_min: %u queue_map_max: %u\n",
551 pkt_dev->queue_map_min,
552 pkt_dev->queue_map_max);
553
554 if (pkt_dev->skb_priority)
555 seq_printf(seq, " skb_priority: %u\n",
556 pkt_dev->skb_priority);
557
558 if (pkt_dev->flags & F_IPV6) {
559 seq_printf(seq,
560 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
561 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
562 &pkt_dev->in6_saddr,
563 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
564 &pkt_dev->in6_daddr,
565 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
566 } else {
567 seq_printf(seq,
568 " dst_min: %s dst_max: %s\n",
569 pkt_dev->dst_min, pkt_dev->dst_max);
570 seq_printf(seq,
571 " src_min: %s src_max: %s\n",
572 pkt_dev->src_min, pkt_dev->src_max);
573 }
574
575 seq_puts(seq, " src_mac: ");
576
577 seq_printf(seq, "%pM ",
578 is_zero_ether_addr(pkt_dev->src_mac) ?
579 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
580
581 seq_printf(seq, "dst_mac: ");
582 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
583
584 seq_printf(seq,
585 " udp_src_min: %d udp_src_max: %d"
586 " udp_dst_min: %d udp_dst_max: %d\n",
587 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
588 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
589
590 seq_printf(seq,
591 " src_mac_count: %d dst_mac_count: %d\n",
592 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
593
594 if (pkt_dev->nr_labels) {
595 unsigned i;
596 seq_printf(seq, " mpls: ");
597 for (i = 0; i < pkt_dev->nr_labels; i++)
598 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
599 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
600 }
601
602 if (pkt_dev->vlan_id != 0xffff)
603 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
604 pkt_dev->vlan_id, pkt_dev->vlan_p,
605 pkt_dev->vlan_cfi);
606
607 if (pkt_dev->svlan_id != 0xffff)
608 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
609 pkt_dev->svlan_id, pkt_dev->svlan_p,
610 pkt_dev->svlan_cfi);
611
612 if (pkt_dev->tos)
613 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
614
615 if (pkt_dev->traffic_class)
616 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
617
618 if (pkt_dev->node >= 0)
619 seq_printf(seq, " node: %d\n", pkt_dev->node);
620
621 seq_printf(seq, " Flags: ");
622
623 if (pkt_dev->flags & F_IPV6)
624 seq_printf(seq, "IPV6 ");
625
626 if (pkt_dev->flags & F_IPSRC_RND)
627 seq_printf(seq, "IPSRC_RND ");
628
629 if (pkt_dev->flags & F_IPDST_RND)
630 seq_printf(seq, "IPDST_RND ");
631
632 if (pkt_dev->flags & F_TXSIZE_RND)
633 seq_printf(seq, "TXSIZE_RND ");
634
635 if (pkt_dev->flags & F_UDPSRC_RND)
636 seq_printf(seq, "UDPSRC_RND ");
637
638 if (pkt_dev->flags & F_UDPDST_RND)
639 seq_printf(seq, "UDPDST_RND ");
640
641 if (pkt_dev->flags & F_MPLS_RND)
642 seq_printf(seq, "MPLS_RND ");
643
644 if (pkt_dev->flags & F_QUEUE_MAP_RND)
645 seq_printf(seq, "QUEUE_MAP_RND ");
646
647 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
648 seq_printf(seq, "QUEUE_MAP_CPU ");
649
650 if (pkt_dev->cflows) {
651 if (pkt_dev->flags & F_FLOW_SEQ)
652 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
653 else
654 seq_printf(seq, "FLOW_RND ");
655 }
656
657 #ifdef CONFIG_XFRM
658 if (pkt_dev->flags & F_IPSEC_ON)
659 seq_printf(seq, "IPSEC ");
660 #endif
661
662 if (pkt_dev->flags & F_MACSRC_RND)
663 seq_printf(seq, "MACSRC_RND ");
664
665 if (pkt_dev->flags & F_MACDST_RND)
666 seq_printf(seq, "MACDST_RND ");
667
668 if (pkt_dev->flags & F_VID_RND)
669 seq_printf(seq, "VID_RND ");
670
671 if (pkt_dev->flags & F_SVID_RND)
672 seq_printf(seq, "SVID_RND ");
673
674 if (pkt_dev->flags & F_NODE)
675 seq_printf(seq, "NODE_ALLOC ");
676
677 seq_puts(seq, "\n");
678
679 /* not really stopped, more like last-running-at */
680 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at;
681 idle = pkt_dev->idle_acc;
682 do_div(idle, NSEC_PER_USEC);
683
684 seq_printf(seq,
685 "Current:\n pkts-sofar: %llu errors: %llu\n",
686 (unsigned long long)pkt_dev->sofar,
687 (unsigned long long)pkt_dev->errors);
688
689 seq_printf(seq,
690 " started: %lluus stopped: %lluus idle: %lluus\n",
691 (unsigned long long) ktime_to_us(pkt_dev->started_at),
692 (unsigned long long) ktime_to_us(stopped),
693 (unsigned long long) idle);
694
695 seq_printf(seq,
696 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
697 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
698 pkt_dev->cur_src_mac_offset);
699
700 if (pkt_dev->flags & F_IPV6) {
701 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
702 &pkt_dev->cur_in6_saddr,
703 &pkt_dev->cur_in6_daddr);
704 } else
705 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
706 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
707
708 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
709 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
710
711 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
712
713 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
714
715 if (pkt_dev->result[0])
716 seq_printf(seq, "Result: %s\n", pkt_dev->result);
717 else
718 seq_printf(seq, "Result: Idle\n");
719
720 return 0;
721 }
722
723
724 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
725 __u32 *num)
726 {
727 int i = 0;
728 *num = 0;
729
730 for (; i < maxlen; i++) {
731 int value;
732 char c;
733 *num <<= 4;
734 if (get_user(c, &user_buffer[i]))
735 return -EFAULT;
736 value = hex_to_bin(c);
737 if (value >= 0)
738 *num |= value;
739 else
740 break;
741 }
742 return i;
743 }
744
745 static int count_trail_chars(const char __user * user_buffer,
746 unsigned int maxlen)
747 {
748 int i;
749
750 for (i = 0; i < maxlen; i++) {
751 char c;
752 if (get_user(c, &user_buffer[i]))
753 return -EFAULT;
754 switch (c) {
755 case '\"':
756 case '\n':
757 case '\r':
758 case '\t':
759 case ' ':
760 case '=':
761 break;
762 default:
763 goto done;
764 }
765 }
766 done:
767 return i;
768 }
769
770 static unsigned long num_arg(const char __user * user_buffer,
771 unsigned long maxlen, unsigned long *num)
772 {
773 int i;
774 *num = 0;
775
776 for (i = 0; i < maxlen; i++) {
777 char c;
778 if (get_user(c, &user_buffer[i]))
779 return -EFAULT;
780 if ((c >= '0') && (c <= '9')) {
781 *num *= 10;
782 *num += c - '0';
783 } else
784 break;
785 }
786 return i;
787 }
788
789 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
790 {
791 int i;
792
793 for (i = 0; i < maxlen; i++) {
794 char c;
795 if (get_user(c, &user_buffer[i]))
796 return -EFAULT;
797 switch (c) {
798 case '\"':
799 case '\n':
800 case '\r':
801 case '\t':
802 case ' ':
803 goto done_str;
804 break;
805 default:
806 break;
807 }
808 }
809 done_str:
810 return i;
811 }
812
813 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
814 {
815 unsigned n = 0;
816 char c;
817 ssize_t i = 0;
818 int len;
819
820 pkt_dev->nr_labels = 0;
821 do {
822 __u32 tmp;
823 len = hex32_arg(&buffer[i], 8, &tmp);
824 if (len <= 0)
825 return len;
826 pkt_dev->labels[n] = htonl(tmp);
827 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
828 pkt_dev->flags |= F_MPLS_RND;
829 i += len;
830 if (get_user(c, &buffer[i]))
831 return -EFAULT;
832 i++;
833 n++;
834 if (n >= MAX_MPLS_LABELS)
835 return -E2BIG;
836 } while (c == ',');
837
838 pkt_dev->nr_labels = n;
839 return i;
840 }
841
842 static ssize_t pktgen_if_write(struct file *file,
843 const char __user * user_buffer, size_t count,
844 loff_t * offset)
845 {
846 struct seq_file *seq = file->private_data;
847 struct pktgen_dev *pkt_dev = seq->private;
848 int i, max, len;
849 char name[16], valstr[32];
850 unsigned long value = 0;
851 char *pg_result = NULL;
852 int tmp = 0;
853 char buf[128];
854
855 pg_result = &(pkt_dev->result[0]);
856
857 if (count < 1) {
858 pr_warning("wrong command format\n");
859 return -EINVAL;
860 }
861
862 max = count;
863 tmp = count_trail_chars(user_buffer, max);
864 if (tmp < 0) {
865 pr_warning("illegal format\n");
866 return tmp;
867 }
868 i = tmp;
869
870 /* Read variable name */
871
872 len = strn_len(&user_buffer[i], sizeof(name) - 1);
873 if (len < 0)
874 return len;
875
876 memset(name, 0, sizeof(name));
877 if (copy_from_user(name, &user_buffer[i], len))
878 return -EFAULT;
879 i += len;
880
881 max = count - i;
882 len = count_trail_chars(&user_buffer[i], max);
883 if (len < 0)
884 return len;
885
886 i += len;
887
888 if (debug) {
889 size_t copy = min_t(size_t, count, 1023);
890 char tb[copy + 1];
891 if (copy_from_user(tb, user_buffer, copy))
892 return -EFAULT;
893 tb[copy] = 0;
894 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name,
895 (unsigned long)count, tb);
896 }
897
898 if (!strcmp(name, "min_pkt_size")) {
899 len = num_arg(&user_buffer[i], 10, &value);
900 if (len < 0)
901 return len;
902
903 i += len;
904 if (value < 14 + 20 + 8)
905 value = 14 + 20 + 8;
906 if (value != pkt_dev->min_pkt_size) {
907 pkt_dev->min_pkt_size = value;
908 pkt_dev->cur_pkt_size = value;
909 }
910 sprintf(pg_result, "OK: min_pkt_size=%u",
911 pkt_dev->min_pkt_size);
912 return count;
913 }
914
915 if (!strcmp(name, "max_pkt_size")) {
916 len = num_arg(&user_buffer[i], 10, &value);
917 if (len < 0)
918 return len;
919
920 i += len;
921 if (value < 14 + 20 + 8)
922 value = 14 + 20 + 8;
923 if (value != pkt_dev->max_pkt_size) {
924 pkt_dev->max_pkt_size = value;
925 pkt_dev->cur_pkt_size = value;
926 }
927 sprintf(pg_result, "OK: max_pkt_size=%u",
928 pkt_dev->max_pkt_size);
929 return count;
930 }
931
932 /* Shortcut for min = max */
933
934 if (!strcmp(name, "pkt_size")) {
935 len = num_arg(&user_buffer[i], 10, &value);
936 if (len < 0)
937 return len;
938
939 i += len;
940 if (value < 14 + 20 + 8)
941 value = 14 + 20 + 8;
942 if (value != pkt_dev->min_pkt_size) {
943 pkt_dev->min_pkt_size = value;
944 pkt_dev->max_pkt_size = value;
945 pkt_dev->cur_pkt_size = value;
946 }
947 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
948 return count;
949 }
950
951 if (!strcmp(name, "debug")) {
952 len = num_arg(&user_buffer[i], 10, &value);
953 if (len < 0)
954 return len;
955
956 i += len;
957 debug = value;
958 sprintf(pg_result, "OK: debug=%u", debug);
959 return count;
960 }
961
962 if (!strcmp(name, "frags")) {
963 len = num_arg(&user_buffer[i], 10, &value);
964 if (len < 0)
965 return len;
966
967 i += len;
968 pkt_dev->nfrags = value;
969 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
970 return count;
971 }
972 if (!strcmp(name, "delay")) {
973 len = num_arg(&user_buffer[i], 10, &value);
974 if (len < 0)
975 return len;
976
977 i += len;
978 if (value == 0x7FFFFFFF)
979 pkt_dev->delay = ULLONG_MAX;
980 else
981 pkt_dev->delay = (u64)value;
982
983 sprintf(pg_result, "OK: delay=%llu",
984 (unsigned long long) pkt_dev->delay);
985 return count;
986 }
987 if (!strcmp(name, "rate")) {
988 len = num_arg(&user_buffer[i], 10, &value);
989 if (len < 0)
990 return len;
991
992 i += len;
993 if (!value)
994 return len;
995 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
996 if (debug)
997 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
998
999 sprintf(pg_result, "OK: rate=%lu", value);
1000 return count;
1001 }
1002 if (!strcmp(name, "ratep")) {
1003 len = num_arg(&user_buffer[i], 10, &value);
1004 if (len < 0)
1005 return len;
1006
1007 i += len;
1008 if (!value)
1009 return len;
1010 pkt_dev->delay = NSEC_PER_SEC/value;
1011 if (debug)
1012 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1013
1014 sprintf(pg_result, "OK: rate=%lu", value);
1015 return count;
1016 }
1017 if (!strcmp(name, "udp_src_min")) {
1018 len = num_arg(&user_buffer[i], 10, &value);
1019 if (len < 0)
1020 return len;
1021
1022 i += len;
1023 if (value != pkt_dev->udp_src_min) {
1024 pkt_dev->udp_src_min = value;
1025 pkt_dev->cur_udp_src = value;
1026 }
1027 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1028 return count;
1029 }
1030 if (!strcmp(name, "udp_dst_min")) {
1031 len = num_arg(&user_buffer[i], 10, &value);
1032 if (len < 0)
1033 return len;
1034
1035 i += len;
1036 if (value != pkt_dev->udp_dst_min) {
1037 pkt_dev->udp_dst_min = value;
1038 pkt_dev->cur_udp_dst = value;
1039 }
1040 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1041 return count;
1042 }
1043 if (!strcmp(name, "udp_src_max")) {
1044 len = num_arg(&user_buffer[i], 10, &value);
1045 if (len < 0)
1046 return len;
1047
1048 i += len;
1049 if (value != pkt_dev->udp_src_max) {
1050 pkt_dev->udp_src_max = value;
1051 pkt_dev->cur_udp_src = value;
1052 }
1053 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1054 return count;
1055 }
1056 if (!strcmp(name, "udp_dst_max")) {
1057 len = num_arg(&user_buffer[i], 10, &value);
1058 if (len < 0)
1059 return len;
1060
1061 i += len;
1062 if (value != pkt_dev->udp_dst_max) {
1063 pkt_dev->udp_dst_max = value;
1064 pkt_dev->cur_udp_dst = value;
1065 }
1066 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1067 return count;
1068 }
1069 if (!strcmp(name, "clone_skb")) {
1070 len = num_arg(&user_buffer[i], 10, &value);
1071 if (len < 0)
1072 return len;
1073 if ((value > 0) &&
1074 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1075 return -ENOTSUPP;
1076 i += len;
1077 pkt_dev->clone_skb = value;
1078
1079 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1080 return count;
1081 }
1082 if (!strcmp(name, "count")) {
1083 len = num_arg(&user_buffer[i], 10, &value);
1084 if (len < 0)
1085 return len;
1086
1087 i += len;
1088 pkt_dev->count = value;
1089 sprintf(pg_result, "OK: count=%llu",
1090 (unsigned long long)pkt_dev->count);
1091 return count;
1092 }
1093 if (!strcmp(name, "src_mac_count")) {
1094 len = num_arg(&user_buffer[i], 10, &value);
1095 if (len < 0)
1096 return len;
1097
1098 i += len;
1099 if (pkt_dev->src_mac_count != value) {
1100 pkt_dev->src_mac_count = value;
1101 pkt_dev->cur_src_mac_offset = 0;
1102 }
1103 sprintf(pg_result, "OK: src_mac_count=%d",
1104 pkt_dev->src_mac_count);
1105 return count;
1106 }
1107 if (!strcmp(name, "dst_mac_count")) {
1108 len = num_arg(&user_buffer[i], 10, &value);
1109 if (len < 0)
1110 return len;
1111
1112 i += len;
1113 if (pkt_dev->dst_mac_count != value) {
1114 pkt_dev->dst_mac_count = value;
1115 pkt_dev->cur_dst_mac_offset = 0;
1116 }
1117 sprintf(pg_result, "OK: dst_mac_count=%d",
1118 pkt_dev->dst_mac_count);
1119 return count;
1120 }
1121 if (!strcmp(name, "node")) {
1122 len = num_arg(&user_buffer[i], 10, &value);
1123 if (len < 0)
1124 return len;
1125
1126 i += len;
1127
1128 if (node_possible(value)) {
1129 pkt_dev->node = value;
1130 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1131 if (pkt_dev->page) {
1132 put_page(pkt_dev->page);
1133 pkt_dev->page = NULL;
1134 }
1135 }
1136 else
1137 sprintf(pg_result, "ERROR: node not possible");
1138 return count;
1139 }
1140 if (!strcmp(name, "flag")) {
1141 char f[32];
1142 memset(f, 0, 32);
1143 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1144 if (len < 0)
1145 return len;
1146
1147 if (copy_from_user(f, &user_buffer[i], len))
1148 return -EFAULT;
1149 i += len;
1150 if (strcmp(f, "IPSRC_RND") == 0)
1151 pkt_dev->flags |= F_IPSRC_RND;
1152
1153 else if (strcmp(f, "!IPSRC_RND") == 0)
1154 pkt_dev->flags &= ~F_IPSRC_RND;
1155
1156 else if (strcmp(f, "TXSIZE_RND") == 0)
1157 pkt_dev->flags |= F_TXSIZE_RND;
1158
1159 else if (strcmp(f, "!TXSIZE_RND") == 0)
1160 pkt_dev->flags &= ~F_TXSIZE_RND;
1161
1162 else if (strcmp(f, "IPDST_RND") == 0)
1163 pkt_dev->flags |= F_IPDST_RND;
1164
1165 else if (strcmp(f, "!IPDST_RND") == 0)
1166 pkt_dev->flags &= ~F_IPDST_RND;
1167
1168 else if (strcmp(f, "UDPSRC_RND") == 0)
1169 pkt_dev->flags |= F_UDPSRC_RND;
1170
1171 else if (strcmp(f, "!UDPSRC_RND") == 0)
1172 pkt_dev->flags &= ~F_UDPSRC_RND;
1173
1174 else if (strcmp(f, "UDPDST_RND") == 0)
1175 pkt_dev->flags |= F_UDPDST_RND;
1176
1177 else if (strcmp(f, "!UDPDST_RND") == 0)
1178 pkt_dev->flags &= ~F_UDPDST_RND;
1179
1180 else if (strcmp(f, "MACSRC_RND") == 0)
1181 pkt_dev->flags |= F_MACSRC_RND;
1182
1183 else if (strcmp(f, "!MACSRC_RND") == 0)
1184 pkt_dev->flags &= ~F_MACSRC_RND;
1185
1186 else if (strcmp(f, "MACDST_RND") == 0)
1187 pkt_dev->flags |= F_MACDST_RND;
1188
1189 else if (strcmp(f, "!MACDST_RND") == 0)
1190 pkt_dev->flags &= ~F_MACDST_RND;
1191
1192 else if (strcmp(f, "MPLS_RND") == 0)
1193 pkt_dev->flags |= F_MPLS_RND;
1194
1195 else if (strcmp(f, "!MPLS_RND") == 0)
1196 pkt_dev->flags &= ~F_MPLS_RND;
1197
1198 else if (strcmp(f, "VID_RND") == 0)
1199 pkt_dev->flags |= F_VID_RND;
1200
1201 else if (strcmp(f, "!VID_RND") == 0)
1202 pkt_dev->flags &= ~F_VID_RND;
1203
1204 else if (strcmp(f, "SVID_RND") == 0)
1205 pkt_dev->flags |= F_SVID_RND;
1206
1207 else if (strcmp(f, "!SVID_RND") == 0)
1208 pkt_dev->flags &= ~F_SVID_RND;
1209
1210 else if (strcmp(f, "FLOW_SEQ") == 0)
1211 pkt_dev->flags |= F_FLOW_SEQ;
1212
1213 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1214 pkt_dev->flags |= F_QUEUE_MAP_RND;
1215
1216 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1217 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1218
1219 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1220 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1221
1222 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1223 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1224 #ifdef CONFIG_XFRM
1225 else if (strcmp(f, "IPSEC") == 0)
1226 pkt_dev->flags |= F_IPSEC_ON;
1227 #endif
1228
1229 else if (strcmp(f, "!IPV6") == 0)
1230 pkt_dev->flags &= ~F_IPV6;
1231
1232 else if (strcmp(f, "NODE_ALLOC") == 0)
1233 pkt_dev->flags |= F_NODE;
1234
1235 else if (strcmp(f, "!NODE_ALLOC") == 0)
1236 pkt_dev->flags &= ~F_NODE;
1237
1238 else {
1239 sprintf(pg_result,
1240 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1241 f,
1242 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1243 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n");
1244 return count;
1245 }
1246 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1247 return count;
1248 }
1249 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1250 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1251 if (len < 0)
1252 return len;
1253
1254 if (copy_from_user(buf, &user_buffer[i], len))
1255 return -EFAULT;
1256 buf[len] = 0;
1257 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1258 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1259 strncpy(pkt_dev->dst_min, buf, len);
1260 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1261 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1262 }
1263 if (debug)
1264 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1265 pkt_dev->dst_min);
1266 i += len;
1267 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1268 return count;
1269 }
1270 if (!strcmp(name, "dst_max")) {
1271 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1272 if (len < 0)
1273 return len;
1274
1275
1276 if (copy_from_user(buf, &user_buffer[i], len))
1277 return -EFAULT;
1278
1279 buf[len] = 0;
1280 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1281 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1282 strncpy(pkt_dev->dst_max, buf, len);
1283 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1284 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1285 }
1286 if (debug)
1287 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1288 pkt_dev->dst_max);
1289 i += len;
1290 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1291 return count;
1292 }
1293 if (!strcmp(name, "dst6")) {
1294 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1295 if (len < 0)
1296 return len;
1297
1298 pkt_dev->flags |= F_IPV6;
1299
1300 if (copy_from_user(buf, &user_buffer[i], len))
1301 return -EFAULT;
1302 buf[len] = 0;
1303
1304 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1305 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1306
1307 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1308
1309 if (debug)
1310 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1311
1312 i += len;
1313 sprintf(pg_result, "OK: dst6=%s", buf);
1314 return count;
1315 }
1316 if (!strcmp(name, "dst6_min")) {
1317 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1318 if (len < 0)
1319 return len;
1320
1321 pkt_dev->flags |= F_IPV6;
1322
1323 if (copy_from_user(buf, &user_buffer[i], len))
1324 return -EFAULT;
1325 buf[len] = 0;
1326
1327 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1328 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1329
1330 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1331 &pkt_dev->min_in6_daddr);
1332 if (debug)
1333 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1334
1335 i += len;
1336 sprintf(pg_result, "OK: dst6_min=%s", buf);
1337 return count;
1338 }
1339 if (!strcmp(name, "dst6_max")) {
1340 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1341 if (len < 0)
1342 return len;
1343
1344 pkt_dev->flags |= F_IPV6;
1345
1346 if (copy_from_user(buf, &user_buffer[i], len))
1347 return -EFAULT;
1348 buf[len] = 0;
1349
1350 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1351 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1352
1353 if (debug)
1354 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1355
1356 i += len;
1357 sprintf(pg_result, "OK: dst6_max=%s", buf);
1358 return count;
1359 }
1360 if (!strcmp(name, "src6")) {
1361 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1362 if (len < 0)
1363 return len;
1364
1365 pkt_dev->flags |= F_IPV6;
1366
1367 if (copy_from_user(buf, &user_buffer[i], len))
1368 return -EFAULT;
1369 buf[len] = 0;
1370
1371 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1372 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1373
1374 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1375
1376 if (debug)
1377 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1378
1379 i += len;
1380 sprintf(pg_result, "OK: src6=%s", buf);
1381 return count;
1382 }
1383 if (!strcmp(name, "src_min")) {
1384 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1385 if (len < 0)
1386 return len;
1387
1388 if (copy_from_user(buf, &user_buffer[i], len))
1389 return -EFAULT;
1390 buf[len] = 0;
1391 if (strcmp(buf, pkt_dev->src_min) != 0) {
1392 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1393 strncpy(pkt_dev->src_min, buf, len);
1394 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1395 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1396 }
1397 if (debug)
1398 printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1399 pkt_dev->src_min);
1400 i += len;
1401 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1402 return count;
1403 }
1404 if (!strcmp(name, "src_max")) {
1405 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1406 if (len < 0)
1407 return len;
1408
1409 if (copy_from_user(buf, &user_buffer[i], len))
1410 return -EFAULT;
1411 buf[len] = 0;
1412 if (strcmp(buf, pkt_dev->src_max) != 0) {
1413 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1414 strncpy(pkt_dev->src_max, buf, len);
1415 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1416 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1417 }
1418 if (debug)
1419 printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1420 pkt_dev->src_max);
1421 i += len;
1422 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1423 return count;
1424 }
1425 if (!strcmp(name, "dst_mac")) {
1426 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1427 if (len < 0)
1428 return len;
1429
1430 memset(valstr, 0, sizeof(valstr));
1431 if (copy_from_user(valstr, &user_buffer[i], len))
1432 return -EFAULT;
1433
1434 if (!mac_pton(valstr, pkt_dev->dst_mac))
1435 return -EINVAL;
1436 /* Set up Dest MAC */
1437 memcpy(&pkt_dev->hh[0], pkt_dev->dst_mac, ETH_ALEN);
1438
1439 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1440 return count;
1441 }
1442 if (!strcmp(name, "src_mac")) {
1443 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1444 if (len < 0)
1445 return len;
1446
1447 memset(valstr, 0, sizeof(valstr));
1448 if (copy_from_user(valstr, &user_buffer[i], len))
1449 return -EFAULT;
1450
1451 if (!mac_pton(valstr, pkt_dev->src_mac))
1452 return -EINVAL;
1453 /* Set up Src MAC */
1454 memcpy(&pkt_dev->hh[6], pkt_dev->src_mac, ETH_ALEN);
1455
1456 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1457 return count;
1458 }
1459
1460 if (!strcmp(name, "clear_counters")) {
1461 pktgen_clear_counters(pkt_dev);
1462 sprintf(pg_result, "OK: Clearing counters.\n");
1463 return count;
1464 }
1465
1466 if (!strcmp(name, "flows")) {
1467 len = num_arg(&user_buffer[i], 10, &value);
1468 if (len < 0)
1469 return len;
1470
1471 i += len;
1472 if (value > MAX_CFLOWS)
1473 value = MAX_CFLOWS;
1474
1475 pkt_dev->cflows = value;
1476 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1477 return count;
1478 }
1479
1480 if (!strcmp(name, "flowlen")) {
1481 len = num_arg(&user_buffer[i], 10, &value);
1482 if (len < 0)
1483 return len;
1484
1485 i += len;
1486 pkt_dev->lflow = value;
1487 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1488 return count;
1489 }
1490
1491 if (!strcmp(name, "queue_map_min")) {
1492 len = num_arg(&user_buffer[i], 5, &value);
1493 if (len < 0)
1494 return len;
1495
1496 i += len;
1497 pkt_dev->queue_map_min = value;
1498 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1499 return count;
1500 }
1501
1502 if (!strcmp(name, "queue_map_max")) {
1503 len = num_arg(&user_buffer[i], 5, &value);
1504 if (len < 0)
1505 return len;
1506
1507 i += len;
1508 pkt_dev->queue_map_max = value;
1509 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1510 return count;
1511 }
1512
1513 if (!strcmp(name, "mpls")) {
1514 unsigned n, cnt;
1515
1516 len = get_labels(&user_buffer[i], pkt_dev);
1517 if (len < 0)
1518 return len;
1519 i += len;
1520 cnt = sprintf(pg_result, "OK: mpls=");
1521 for (n = 0; n < pkt_dev->nr_labels; n++)
1522 cnt += sprintf(pg_result + cnt,
1523 "%08x%s", ntohl(pkt_dev->labels[n]),
1524 n == pkt_dev->nr_labels-1 ? "" : ",");
1525
1526 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1527 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1528 pkt_dev->svlan_id = 0xffff;
1529
1530 if (debug)
1531 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1532 }
1533 return count;
1534 }
1535
1536 if (!strcmp(name, "vlan_id")) {
1537 len = num_arg(&user_buffer[i], 4, &value);
1538 if (len < 0)
1539 return len;
1540
1541 i += len;
1542 if (value <= 4095) {
1543 pkt_dev->vlan_id = value; /* turn on VLAN */
1544
1545 if (debug)
1546 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1547
1548 if (debug && pkt_dev->nr_labels)
1549 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1550
1551 pkt_dev->nr_labels = 0; /* turn off MPLS */
1552 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1553 } else {
1554 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1555 pkt_dev->svlan_id = 0xffff;
1556
1557 if (debug)
1558 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1559 }
1560 return count;
1561 }
1562
1563 if (!strcmp(name, "vlan_p")) {
1564 len = num_arg(&user_buffer[i], 1, &value);
1565 if (len < 0)
1566 return len;
1567
1568 i += len;
1569 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1570 pkt_dev->vlan_p = value;
1571 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1572 } else {
1573 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1574 }
1575 return count;
1576 }
1577
1578 if (!strcmp(name, "vlan_cfi")) {
1579 len = num_arg(&user_buffer[i], 1, &value);
1580 if (len < 0)
1581 return len;
1582
1583 i += len;
1584 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1585 pkt_dev->vlan_cfi = value;
1586 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1587 } else {
1588 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1589 }
1590 return count;
1591 }
1592
1593 if (!strcmp(name, "svlan_id")) {
1594 len = num_arg(&user_buffer[i], 4, &value);
1595 if (len < 0)
1596 return len;
1597
1598 i += len;
1599 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1600 pkt_dev->svlan_id = value; /* turn on SVLAN */
1601
1602 if (debug)
1603 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1604
1605 if (debug && pkt_dev->nr_labels)
1606 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1607
1608 pkt_dev->nr_labels = 0; /* turn off MPLS */
1609 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1610 } else {
1611 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1612 pkt_dev->svlan_id = 0xffff;
1613
1614 if (debug)
1615 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1616 }
1617 return count;
1618 }
1619
1620 if (!strcmp(name, "svlan_p")) {
1621 len = num_arg(&user_buffer[i], 1, &value);
1622 if (len < 0)
1623 return len;
1624
1625 i += len;
1626 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1627 pkt_dev->svlan_p = value;
1628 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1629 } else {
1630 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1631 }
1632 return count;
1633 }
1634
1635 if (!strcmp(name, "svlan_cfi")) {
1636 len = num_arg(&user_buffer[i], 1, &value);
1637 if (len < 0)
1638 return len;
1639
1640 i += len;
1641 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1642 pkt_dev->svlan_cfi = value;
1643 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1644 } else {
1645 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1646 }
1647 return count;
1648 }
1649
1650 if (!strcmp(name, "tos")) {
1651 __u32 tmp_value = 0;
1652 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1653 if (len < 0)
1654 return len;
1655
1656 i += len;
1657 if (len == 2) {
1658 pkt_dev->tos = tmp_value;
1659 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1660 } else {
1661 sprintf(pg_result, "ERROR: tos must be 00-ff");
1662 }
1663 return count;
1664 }
1665
1666 if (!strcmp(name, "traffic_class")) {
1667 __u32 tmp_value = 0;
1668 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1669 if (len < 0)
1670 return len;
1671
1672 i += len;
1673 if (len == 2) {
1674 pkt_dev->traffic_class = tmp_value;
1675 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1676 } else {
1677 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1678 }
1679 return count;
1680 }
1681
1682 if (!strcmp(name, "skb_priority")) {
1683 len = num_arg(&user_buffer[i], 9, &value);
1684 if (len < 0)
1685 return len;
1686
1687 i += len;
1688 pkt_dev->skb_priority = value;
1689 sprintf(pg_result, "OK: skb_priority=%i",
1690 pkt_dev->skb_priority);
1691 return count;
1692 }
1693
1694 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1695 return -EINVAL;
1696 }
1697
1698 static int pktgen_if_open(struct inode *inode, struct file *file)
1699 {
1700 return single_open(file, pktgen_if_show, PDE(inode)->data);
1701 }
1702
1703 static const struct file_operations pktgen_if_fops = {
1704 .owner = THIS_MODULE,
1705 .open = pktgen_if_open,
1706 .read = seq_read,
1707 .llseek = seq_lseek,
1708 .write = pktgen_if_write,
1709 .release = single_release,
1710 };
1711
1712 static int pktgen_thread_show(struct seq_file *seq, void *v)
1713 {
1714 struct pktgen_thread *t = seq->private;
1715 const struct pktgen_dev *pkt_dev;
1716
1717 BUG_ON(!t);
1718
1719 seq_printf(seq, "Running: ");
1720
1721 if_lock(t);
1722 list_for_each_entry(pkt_dev, &t->if_list, list)
1723 if (pkt_dev->running)
1724 seq_printf(seq, "%s ", pkt_dev->odevname);
1725
1726 seq_printf(seq, "\nStopped: ");
1727
1728 list_for_each_entry(pkt_dev, &t->if_list, list)
1729 if (!pkt_dev->running)
1730 seq_printf(seq, "%s ", pkt_dev->odevname);
1731
1732 if (t->result[0])
1733 seq_printf(seq, "\nResult: %s\n", t->result);
1734 else
1735 seq_printf(seq, "\nResult: NA\n");
1736
1737 if_unlock(t);
1738
1739 return 0;
1740 }
1741
1742 static ssize_t pktgen_thread_write(struct file *file,
1743 const char __user * user_buffer,
1744 size_t count, loff_t * offset)
1745 {
1746 struct seq_file *seq = file->private_data;
1747 struct pktgen_thread *t = seq->private;
1748 int i, max, len, ret;
1749 char name[40];
1750 char *pg_result;
1751
1752 if (count < 1) {
1753 // sprintf(pg_result, "Wrong command format");
1754 return -EINVAL;
1755 }
1756
1757 max = count;
1758 len = count_trail_chars(user_buffer, max);
1759 if (len < 0)
1760 return len;
1761
1762 i = len;
1763
1764 /* Read variable name */
1765
1766 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1767 if (len < 0)
1768 return len;
1769
1770 memset(name, 0, sizeof(name));
1771 if (copy_from_user(name, &user_buffer[i], len))
1772 return -EFAULT;
1773 i += len;
1774
1775 max = count - i;
1776 len = count_trail_chars(&user_buffer[i], max);
1777 if (len < 0)
1778 return len;
1779
1780 i += len;
1781
1782 if (debug)
1783 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1784 name, (unsigned long)count);
1785
1786 if (!t) {
1787 pr_err("ERROR: No thread\n");
1788 ret = -EINVAL;
1789 goto out;
1790 }
1791
1792 pg_result = &(t->result[0]);
1793
1794 if (!strcmp(name, "add_device")) {
1795 char f[32];
1796 memset(f, 0, 32);
1797 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1798 if (len < 0) {
1799 ret = len;
1800 goto out;
1801 }
1802 if (copy_from_user(f, &user_buffer[i], len))
1803 return -EFAULT;
1804 i += len;
1805 mutex_lock(&pktgen_thread_lock);
1806 pktgen_add_device(t, f);
1807 mutex_unlock(&pktgen_thread_lock);
1808 ret = count;
1809 sprintf(pg_result, "OK: add_device=%s", f);
1810 goto out;
1811 }
1812
1813 if (!strcmp(name, "rem_device_all")) {
1814 mutex_lock(&pktgen_thread_lock);
1815 t->control |= T_REMDEVALL;
1816 mutex_unlock(&pktgen_thread_lock);
1817 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1818 ret = count;
1819 sprintf(pg_result, "OK: rem_device_all");
1820 goto out;
1821 }
1822
1823 if (!strcmp(name, "max_before_softirq")) {
1824 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1825 ret = count;
1826 goto out;
1827 }
1828
1829 ret = -EINVAL;
1830 out:
1831 return ret;
1832 }
1833
1834 static int pktgen_thread_open(struct inode *inode, struct file *file)
1835 {
1836 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1837 }
1838
1839 static const struct file_operations pktgen_thread_fops = {
1840 .owner = THIS_MODULE,
1841 .open = pktgen_thread_open,
1842 .read = seq_read,
1843 .llseek = seq_lseek,
1844 .write = pktgen_thread_write,
1845 .release = single_release,
1846 };
1847
1848 /* Think find or remove for NN */
1849 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1850 {
1851 struct pktgen_thread *t;
1852 struct pktgen_dev *pkt_dev = NULL;
1853 bool exact = (remove == FIND);
1854
1855 list_for_each_entry(t, &pktgen_threads, th_list) {
1856 pkt_dev = pktgen_find_dev(t, ifname, exact);
1857 if (pkt_dev) {
1858 if (remove) {
1859 if_lock(t);
1860 pkt_dev->removal_mark = 1;
1861 t->control |= T_REMDEV;
1862 if_unlock(t);
1863 }
1864 break;
1865 }
1866 }
1867 return pkt_dev;
1868 }
1869
1870 /*
1871 * mark a device for removal
1872 */
1873 static void pktgen_mark_device(const char *ifname)
1874 {
1875 struct pktgen_dev *pkt_dev = NULL;
1876 const int max_tries = 10, msec_per_try = 125;
1877 int i = 0;
1878
1879 mutex_lock(&pktgen_thread_lock);
1880 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1881
1882 while (1) {
1883
1884 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1885 if (pkt_dev == NULL)
1886 break; /* success */
1887
1888 mutex_unlock(&pktgen_thread_lock);
1889 pr_debug("%s: waiting for %s to disappear....\n",
1890 __func__, ifname);
1891 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1892 mutex_lock(&pktgen_thread_lock);
1893
1894 if (++i >= max_tries) {
1895 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1896 __func__, msec_per_try * i, ifname);
1897 break;
1898 }
1899
1900 }
1901
1902 mutex_unlock(&pktgen_thread_lock);
1903 }
1904
1905 static void pktgen_change_name(struct net_device *dev)
1906 {
1907 struct pktgen_thread *t;
1908
1909 list_for_each_entry(t, &pktgen_threads, th_list) {
1910 struct pktgen_dev *pkt_dev;
1911
1912 list_for_each_entry(pkt_dev, &t->if_list, list) {
1913 if (pkt_dev->odev != dev)
1914 continue;
1915
1916 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1917
1918 pkt_dev->entry = proc_create_data(dev->name, 0600,
1919 pg_proc_dir,
1920 &pktgen_if_fops,
1921 pkt_dev);
1922 if (!pkt_dev->entry)
1923 pr_err("can't move proc entry for '%s'\n",
1924 dev->name);
1925 break;
1926 }
1927 }
1928 }
1929
1930 static int pktgen_device_event(struct notifier_block *unused,
1931 unsigned long event, void *ptr)
1932 {
1933 struct net_device *dev = ptr;
1934
1935 if (!net_eq(dev_net(dev), &init_net))
1936 return NOTIFY_DONE;
1937
1938 /* It is OK that we do not hold the group lock right now,
1939 * as we run under the RTNL lock.
1940 */
1941
1942 switch (event) {
1943 case NETDEV_CHANGENAME:
1944 pktgen_change_name(dev);
1945 break;
1946
1947 case NETDEV_UNREGISTER:
1948 pktgen_mark_device(dev->name);
1949 break;
1950 }
1951
1952 return NOTIFY_DONE;
1953 }
1954
1955 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev,
1956 const char *ifname)
1957 {
1958 char b[IFNAMSIZ+5];
1959 int i;
1960
1961 for (i = 0; ifname[i] != '@'; i++) {
1962 if (i == IFNAMSIZ)
1963 break;
1964
1965 b[i] = ifname[i];
1966 }
1967 b[i] = 0;
1968
1969 return dev_get_by_name(&init_net, b);
1970 }
1971
1972
1973 /* Associate pktgen_dev with a device. */
1974
1975 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1976 {
1977 struct net_device *odev;
1978 int err;
1979
1980 /* Clean old setups */
1981 if (pkt_dev->odev) {
1982 dev_put(pkt_dev->odev);
1983 pkt_dev->odev = NULL;
1984 }
1985
1986 odev = pktgen_dev_get_by_name(pkt_dev, ifname);
1987 if (!odev) {
1988 pr_err("no such netdevice: \"%s\"\n", ifname);
1989 return -ENODEV;
1990 }
1991
1992 if (odev->type != ARPHRD_ETHER) {
1993 pr_err("not an ethernet device: \"%s\"\n", ifname);
1994 err = -EINVAL;
1995 } else if (!netif_running(odev)) {
1996 pr_err("device is down: \"%s\"\n", ifname);
1997 err = -ENETDOWN;
1998 } else {
1999 pkt_dev->odev = odev;
2000 return 0;
2001 }
2002
2003 dev_put(odev);
2004 return err;
2005 }
2006
2007 /* Read pkt_dev from the interface and set up internal pktgen_dev
2008 * structure to have the right information to create/send packets
2009 */
2010 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2011 {
2012 int ntxq;
2013
2014 if (!pkt_dev->odev) {
2015 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2016 sprintf(pkt_dev->result,
2017 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2018 return;
2019 }
2020
2021 /* make sure that we don't pick a non-existing transmit queue */
2022 ntxq = pkt_dev->odev->real_num_tx_queues;
2023
2024 if (ntxq <= pkt_dev->queue_map_min) {
2025 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2026 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2027 pkt_dev->odevname);
2028 pkt_dev->queue_map_min = ntxq - 1;
2029 }
2030 if (pkt_dev->queue_map_max >= ntxq) {
2031 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2032 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2033 pkt_dev->odevname);
2034 pkt_dev->queue_map_max = ntxq - 1;
2035 }
2036
2037 /* Default to the interface's mac if not explicitly set. */
2038
2039 if (is_zero_ether_addr(pkt_dev->src_mac))
2040 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2041
2042 /* Set up Dest MAC */
2043 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2044
2045 /* Set up pkt size */
2046 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2047
2048 if (pkt_dev->flags & F_IPV6) {
2049 /*
2050 * Skip this automatic address setting until locks or functions
2051 * gets exported
2052 */
2053
2054 #ifdef NOTNOW
2055 int i, set = 0, err = 1;
2056 struct inet6_dev *idev;
2057
2058 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2059 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2060 set = 1;
2061 break;
2062 }
2063
2064 if (!set) {
2065
2066 /*
2067 * Use linklevel address if unconfigured.
2068 *
2069 * use ipv6_get_lladdr if/when it's get exported
2070 */
2071
2072 rcu_read_lock();
2073 idev = __in6_dev_get(pkt_dev->odev);
2074 if (idev) {
2075 struct inet6_ifaddr *ifp;
2076
2077 read_lock_bh(&idev->lock);
2078 for (ifp = idev->addr_list; ifp;
2079 ifp = ifp->if_next) {
2080 if (ifp->scope == IFA_LINK &&
2081 !(ifp->flags & IFA_F_TENTATIVE)) {
2082 ipv6_addr_copy(&pkt_dev->
2083 cur_in6_saddr,
2084 &ifp->addr);
2085 err = 0;
2086 break;
2087 }
2088 }
2089 read_unlock_bh(&idev->lock);
2090 }
2091 rcu_read_unlock();
2092 if (err)
2093 pr_err("ERROR: IPv6 link address not available\n");
2094 }
2095 #endif
2096 } else {
2097 pkt_dev->saddr_min = 0;
2098 pkt_dev->saddr_max = 0;
2099 if (strlen(pkt_dev->src_min) == 0) {
2100
2101 struct in_device *in_dev;
2102
2103 rcu_read_lock();
2104 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2105 if (in_dev) {
2106 if (in_dev->ifa_list) {
2107 pkt_dev->saddr_min =
2108 in_dev->ifa_list->ifa_address;
2109 pkt_dev->saddr_max = pkt_dev->saddr_min;
2110 }
2111 }
2112 rcu_read_unlock();
2113 } else {
2114 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2115 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2116 }
2117
2118 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2119 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2120 }
2121 /* Initialize current values. */
2122 pkt_dev->cur_dst_mac_offset = 0;
2123 pkt_dev->cur_src_mac_offset = 0;
2124 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2125 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2126 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2127 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2128 pkt_dev->nflows = 0;
2129 }
2130
2131
2132 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2133 {
2134 ktime_t start_time, end_time;
2135 s64 remaining;
2136 struct hrtimer_sleeper t;
2137
2138 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2139 hrtimer_set_expires(&t.timer, spin_until);
2140
2141 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2142 if (remaining <= 0) {
2143 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2144 return;
2145 }
2146
2147 start_time = ktime_now();
2148 if (remaining < 100000) {
2149 /* for small delays (<100us), just loop until limit is reached */
2150 do {
2151 end_time = ktime_now();
2152 } while (ktime_lt(end_time, spin_until));
2153 } else {
2154 /* see do_nanosleep */
2155 hrtimer_init_sleeper(&t, current);
2156 do {
2157 set_current_state(TASK_INTERRUPTIBLE);
2158 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2159 if (!hrtimer_active(&t.timer))
2160 t.task = NULL;
2161
2162 if (likely(t.task))
2163 schedule();
2164
2165 hrtimer_cancel(&t.timer);
2166 } while (t.task && pkt_dev->running && !signal_pending(current));
2167 __set_current_state(TASK_RUNNING);
2168 end_time = ktime_now();
2169 }
2170
2171 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2172 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2173 }
2174
2175 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2176 {
2177 pkt_dev->pkt_overhead = 0;
2178 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2179 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2180 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2181 }
2182
2183 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2184 {
2185 return !!(pkt_dev->flows[flow].flags & F_INIT);
2186 }
2187
2188 static inline int f_pick(struct pktgen_dev *pkt_dev)
2189 {
2190 int flow = pkt_dev->curfl;
2191
2192 if (pkt_dev->flags & F_FLOW_SEQ) {
2193 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2194 /* reset time */
2195 pkt_dev->flows[flow].count = 0;
2196 pkt_dev->flows[flow].flags = 0;
2197 pkt_dev->curfl += 1;
2198 if (pkt_dev->curfl >= pkt_dev->cflows)
2199 pkt_dev->curfl = 0; /*reset */
2200 }
2201 } else {
2202 flow = random32() % pkt_dev->cflows;
2203 pkt_dev->curfl = flow;
2204
2205 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2206 pkt_dev->flows[flow].count = 0;
2207 pkt_dev->flows[flow].flags = 0;
2208 }
2209 }
2210
2211 return pkt_dev->curfl;
2212 }
2213
2214
2215 #ifdef CONFIG_XFRM
2216 /* If there was already an IPSEC SA, we keep it as is, else
2217 * we go look for it ...
2218 */
2219 #define DUMMY_MARK 0
2220 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2221 {
2222 struct xfrm_state *x = pkt_dev->flows[flow].x;
2223 if (!x) {
2224 /*slow path: we dont already have xfrm_state*/
2225 x = xfrm_stateonly_find(&init_net, DUMMY_MARK,
2226 (xfrm_address_t *)&pkt_dev->cur_daddr,
2227 (xfrm_address_t *)&pkt_dev->cur_saddr,
2228 AF_INET,
2229 pkt_dev->ipsmode,
2230 pkt_dev->ipsproto, 0);
2231 if (x) {
2232 pkt_dev->flows[flow].x = x;
2233 set_pkt_overhead(pkt_dev);
2234 pkt_dev->pkt_overhead += x->props.header_len;
2235 }
2236
2237 }
2238 }
2239 #endif
2240 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2241 {
2242
2243 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2244 pkt_dev->cur_queue_map = smp_processor_id();
2245
2246 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2247 __u16 t;
2248 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2249 t = random32() %
2250 (pkt_dev->queue_map_max -
2251 pkt_dev->queue_map_min + 1)
2252 + pkt_dev->queue_map_min;
2253 } else {
2254 t = pkt_dev->cur_queue_map + 1;
2255 if (t > pkt_dev->queue_map_max)
2256 t = pkt_dev->queue_map_min;
2257 }
2258 pkt_dev->cur_queue_map = t;
2259 }
2260 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2261 }
2262
2263 /* Increment/randomize headers according to flags and current values
2264 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2265 */
2266 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2267 {
2268 __u32 imn;
2269 __u32 imx;
2270 int flow = 0;
2271
2272 if (pkt_dev->cflows)
2273 flow = f_pick(pkt_dev);
2274
2275 /* Deal with source MAC */
2276 if (pkt_dev->src_mac_count > 1) {
2277 __u32 mc;
2278 __u32 tmp;
2279
2280 if (pkt_dev->flags & F_MACSRC_RND)
2281 mc = random32() % pkt_dev->src_mac_count;
2282 else {
2283 mc = pkt_dev->cur_src_mac_offset++;
2284 if (pkt_dev->cur_src_mac_offset >=
2285 pkt_dev->src_mac_count)
2286 pkt_dev->cur_src_mac_offset = 0;
2287 }
2288
2289 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2290 pkt_dev->hh[11] = tmp;
2291 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2292 pkt_dev->hh[10] = tmp;
2293 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2294 pkt_dev->hh[9] = tmp;
2295 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2296 pkt_dev->hh[8] = tmp;
2297 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2298 pkt_dev->hh[7] = tmp;
2299 }
2300
2301 /* Deal with Destination MAC */
2302 if (pkt_dev->dst_mac_count > 1) {
2303 __u32 mc;
2304 __u32 tmp;
2305
2306 if (pkt_dev->flags & F_MACDST_RND)
2307 mc = random32() % pkt_dev->dst_mac_count;
2308
2309 else {
2310 mc = pkt_dev->cur_dst_mac_offset++;
2311 if (pkt_dev->cur_dst_mac_offset >=
2312 pkt_dev->dst_mac_count) {
2313 pkt_dev->cur_dst_mac_offset = 0;
2314 }
2315 }
2316
2317 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2318 pkt_dev->hh[5] = tmp;
2319 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2320 pkt_dev->hh[4] = tmp;
2321 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2322 pkt_dev->hh[3] = tmp;
2323 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2324 pkt_dev->hh[2] = tmp;
2325 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2326 pkt_dev->hh[1] = tmp;
2327 }
2328
2329 if (pkt_dev->flags & F_MPLS_RND) {
2330 unsigned i;
2331 for (i = 0; i < pkt_dev->nr_labels; i++)
2332 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2333 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2334 ((__force __be32)random32() &
2335 htonl(0x000fffff));
2336 }
2337
2338 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2339 pkt_dev->vlan_id = random32() & (4096-1);
2340 }
2341
2342 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2343 pkt_dev->svlan_id = random32() & (4096 - 1);
2344 }
2345
2346 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2347 if (pkt_dev->flags & F_UDPSRC_RND)
2348 pkt_dev->cur_udp_src = random32() %
2349 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2350 + pkt_dev->udp_src_min;
2351
2352 else {
2353 pkt_dev->cur_udp_src++;
2354 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2355 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2356 }
2357 }
2358
2359 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2360 if (pkt_dev->flags & F_UDPDST_RND) {
2361 pkt_dev->cur_udp_dst = random32() %
2362 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2363 + pkt_dev->udp_dst_min;
2364 } else {
2365 pkt_dev->cur_udp_dst++;
2366 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2367 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2368 }
2369 }
2370
2371 if (!(pkt_dev->flags & F_IPV6)) {
2372
2373 imn = ntohl(pkt_dev->saddr_min);
2374 imx = ntohl(pkt_dev->saddr_max);
2375 if (imn < imx) {
2376 __u32 t;
2377 if (pkt_dev->flags & F_IPSRC_RND)
2378 t = random32() % (imx - imn) + imn;
2379 else {
2380 t = ntohl(pkt_dev->cur_saddr);
2381 t++;
2382 if (t > imx)
2383 t = imn;
2384
2385 }
2386 pkt_dev->cur_saddr = htonl(t);
2387 }
2388
2389 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2390 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2391 } else {
2392 imn = ntohl(pkt_dev->daddr_min);
2393 imx = ntohl(pkt_dev->daddr_max);
2394 if (imn < imx) {
2395 __u32 t;
2396 __be32 s;
2397 if (pkt_dev->flags & F_IPDST_RND) {
2398
2399 t = random32() % (imx - imn) + imn;
2400 s = htonl(t);
2401
2402 while (ipv4_is_loopback(s) ||
2403 ipv4_is_multicast(s) ||
2404 ipv4_is_lbcast(s) ||
2405 ipv4_is_zeronet(s) ||
2406 ipv4_is_local_multicast(s)) {
2407 t = random32() % (imx - imn) + imn;
2408 s = htonl(t);
2409 }
2410 pkt_dev->cur_daddr = s;
2411 } else {
2412 t = ntohl(pkt_dev->cur_daddr);
2413 t++;
2414 if (t > imx) {
2415 t = imn;
2416 }
2417 pkt_dev->cur_daddr = htonl(t);
2418 }
2419 }
2420 if (pkt_dev->cflows) {
2421 pkt_dev->flows[flow].flags |= F_INIT;
2422 pkt_dev->flows[flow].cur_daddr =
2423 pkt_dev->cur_daddr;
2424 #ifdef CONFIG_XFRM
2425 if (pkt_dev->flags & F_IPSEC_ON)
2426 get_ipsec_sa(pkt_dev, flow);
2427 #endif
2428 pkt_dev->nflows++;
2429 }
2430 }
2431 } else { /* IPV6 * */
2432
2433 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2434 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2435 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2436 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2437 else {
2438 int i;
2439
2440 /* Only random destinations yet */
2441
2442 for (i = 0; i < 4; i++) {
2443 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2444 (((__force __be32)random32() |
2445 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2446 pkt_dev->max_in6_daddr.s6_addr32[i]);
2447 }
2448 }
2449 }
2450
2451 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2452 __u32 t;
2453 if (pkt_dev->flags & F_TXSIZE_RND) {
2454 t = random32() %
2455 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2456 + pkt_dev->min_pkt_size;
2457 } else {
2458 t = pkt_dev->cur_pkt_size + 1;
2459 if (t > pkt_dev->max_pkt_size)
2460 t = pkt_dev->min_pkt_size;
2461 }
2462 pkt_dev->cur_pkt_size = t;
2463 }
2464
2465 set_cur_queue_map(pkt_dev);
2466
2467 pkt_dev->flows[flow].count++;
2468 }
2469
2470
2471 #ifdef CONFIG_XFRM
2472 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2473 {
2474 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2475 int err = 0;
2476
2477 if (!x)
2478 return 0;
2479 /* XXX: we dont support tunnel mode for now until
2480 * we resolve the dst issue */
2481 if (x->props.mode != XFRM_MODE_TRANSPORT)
2482 return 0;
2483
2484 spin_lock(&x->lock);
2485
2486 err = x->outer_mode->output(x, skb);
2487 if (err)
2488 goto error;
2489 err = x->type->output(x, skb);
2490 if (err)
2491 goto error;
2492
2493 x->curlft.bytes += skb->len;
2494 x->curlft.packets++;
2495 error:
2496 spin_unlock(&x->lock);
2497 return err;
2498 }
2499
2500 static void free_SAs(struct pktgen_dev *pkt_dev)
2501 {
2502 if (pkt_dev->cflows) {
2503 /* let go of the SAs if we have them */
2504 int i;
2505 for (i = 0; i < pkt_dev->cflows; i++) {
2506 struct xfrm_state *x = pkt_dev->flows[i].x;
2507 if (x) {
2508 xfrm_state_put(x);
2509 pkt_dev->flows[i].x = NULL;
2510 }
2511 }
2512 }
2513 }
2514
2515 static int process_ipsec(struct pktgen_dev *pkt_dev,
2516 struct sk_buff *skb, __be16 protocol)
2517 {
2518 if (pkt_dev->flags & F_IPSEC_ON) {
2519 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2520 int nhead = 0;
2521 if (x) {
2522 int ret;
2523 __u8 *eth;
2524 nhead = x->props.header_len - skb_headroom(skb);
2525 if (nhead > 0) {
2526 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2527 if (ret < 0) {
2528 pr_err("Error expanding ipsec packet %d\n",
2529 ret);
2530 goto err;
2531 }
2532 }
2533
2534 /* ipsec is not expecting ll header */
2535 skb_pull(skb, ETH_HLEN);
2536 ret = pktgen_output_ipsec(skb, pkt_dev);
2537 if (ret) {
2538 pr_err("Error creating ipsec packet %d\n", ret);
2539 goto err;
2540 }
2541 /* restore ll */
2542 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2543 memcpy(eth, pkt_dev->hh, 12);
2544 *(u16 *) &eth[12] = protocol;
2545 }
2546 }
2547 return 1;
2548 err:
2549 kfree_skb(skb);
2550 return 0;
2551 }
2552 #endif
2553
2554 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2555 {
2556 unsigned i;
2557 for (i = 0; i < pkt_dev->nr_labels; i++)
2558 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2559
2560 mpls--;
2561 *mpls |= MPLS_STACK_BOTTOM;
2562 }
2563
2564 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2565 unsigned int prio)
2566 {
2567 return htons(id | (cfi << 12) | (prio << 13));
2568 }
2569
2570 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2571 int datalen)
2572 {
2573 struct timeval timestamp;
2574 struct pktgen_hdr *pgh;
2575
2576 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
2577 datalen -= sizeof(*pgh);
2578
2579 if (pkt_dev->nfrags <= 0) {
2580 memset(skb_put(skb, datalen), 0, datalen);
2581 } else {
2582 int frags = pkt_dev->nfrags;
2583 int i, len;
2584 int frag_len;
2585
2586
2587 if (frags > MAX_SKB_FRAGS)
2588 frags = MAX_SKB_FRAGS;
2589 len = datalen - frags * PAGE_SIZE;
2590 if (len > 0) {
2591 memset(skb_put(skb, len), 0, len);
2592 datalen = frags * PAGE_SIZE;
2593 }
2594
2595 i = 0;
2596 frag_len = (datalen/frags) < PAGE_SIZE ?
2597 (datalen/frags) : PAGE_SIZE;
2598 while (datalen > 0) {
2599 if (unlikely(!pkt_dev->page)) {
2600 int node = numa_node_id();
2601
2602 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2603 node = pkt_dev->node;
2604 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2605 if (!pkt_dev->page)
2606 break;
2607 }
2608 get_page(pkt_dev->page);
2609 skb_frag_set_page(skb, i, pkt_dev->page);
2610 skb_shinfo(skb)->frags[i].page_offset = 0;
2611 /*last fragment, fill rest of data*/
2612 if (i == (frags - 1))
2613 skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2614 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2615 else
2616 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2617 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2618 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2619 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2620 i++;
2621 skb_shinfo(skb)->nr_frags = i;
2622 }
2623 }
2624
2625 /* Stamp the time, and sequence number,
2626 * convert them to network byte order
2627 */
2628 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2629 pgh->seq_num = htonl(pkt_dev->seq_num);
2630
2631 do_gettimeofday(&timestamp);
2632 pgh->tv_sec = htonl(timestamp.tv_sec);
2633 pgh->tv_usec = htonl(timestamp.tv_usec);
2634 }
2635
2636 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2637 struct pktgen_dev *pkt_dev)
2638 {
2639 struct sk_buff *skb = NULL;
2640 __u8 *eth;
2641 struct udphdr *udph;
2642 int datalen, iplen;
2643 struct iphdr *iph;
2644 __be16 protocol = htons(ETH_P_IP);
2645 __be32 *mpls;
2646 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2647 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2648 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2649 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2650 u16 queue_map;
2651
2652 if (pkt_dev->nr_labels)
2653 protocol = htons(ETH_P_MPLS_UC);
2654
2655 if (pkt_dev->vlan_id != 0xffff)
2656 protocol = htons(ETH_P_8021Q);
2657
2658 /* Update any of the values, used when we're incrementing various
2659 * fields.
2660 */
2661 mod_cur_headers(pkt_dev);
2662 queue_map = pkt_dev->cur_queue_map;
2663
2664 datalen = (odev->hard_header_len + 16) & ~0xf;
2665
2666 if (pkt_dev->flags & F_NODE) {
2667 int node;
2668
2669 if (pkt_dev->node >= 0)
2670 node = pkt_dev->node;
2671 else
2672 node = numa_node_id();
2673
2674 skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64
2675 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node);
2676 if (likely(skb)) {
2677 skb_reserve(skb, NET_SKB_PAD);
2678 skb->dev = odev;
2679 }
2680 }
2681 else
2682 skb = __netdev_alloc_skb(odev,
2683 pkt_dev->cur_pkt_size + 64
2684 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2685
2686 if (!skb) {
2687 sprintf(pkt_dev->result, "No memory");
2688 return NULL;
2689 }
2690 prefetchw(skb->data);
2691
2692 skb_reserve(skb, datalen);
2693
2694 /* Reserve for ethernet and IP header */
2695 eth = (__u8 *) skb_push(skb, 14);
2696 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2697 if (pkt_dev->nr_labels)
2698 mpls_push(mpls, pkt_dev);
2699
2700 if (pkt_dev->vlan_id != 0xffff) {
2701 if (pkt_dev->svlan_id != 0xffff) {
2702 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2703 *svlan_tci = build_tci(pkt_dev->svlan_id,
2704 pkt_dev->svlan_cfi,
2705 pkt_dev->svlan_p);
2706 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2707 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2708 }
2709 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2710 *vlan_tci = build_tci(pkt_dev->vlan_id,
2711 pkt_dev->vlan_cfi,
2712 pkt_dev->vlan_p);
2713 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2714 *vlan_encapsulated_proto = htons(ETH_P_IP);
2715 }
2716
2717 skb->network_header = skb->tail;
2718 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2719 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2720 skb_set_queue_mapping(skb, queue_map);
2721 skb->priority = pkt_dev->skb_priority;
2722
2723 iph = ip_hdr(skb);
2724 udph = udp_hdr(skb);
2725
2726 memcpy(eth, pkt_dev->hh, 12);
2727 *(__be16 *) & eth[12] = protocol;
2728
2729 /* Eth + IPh + UDPh + mpls */
2730 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2731 pkt_dev->pkt_overhead;
2732 if (datalen < sizeof(struct pktgen_hdr))
2733 datalen = sizeof(struct pktgen_hdr);
2734
2735 udph->source = htons(pkt_dev->cur_udp_src);
2736 udph->dest = htons(pkt_dev->cur_udp_dst);
2737 udph->len = htons(datalen + 8); /* DATA + udphdr */
2738 udph->check = 0; /* No checksum */
2739
2740 iph->ihl = 5;
2741 iph->version = 4;
2742 iph->ttl = 32;
2743 iph->tos = pkt_dev->tos;
2744 iph->protocol = IPPROTO_UDP; /* UDP */
2745 iph->saddr = pkt_dev->cur_saddr;
2746 iph->daddr = pkt_dev->cur_daddr;
2747 iph->id = htons(pkt_dev->ip_id);
2748 pkt_dev->ip_id++;
2749 iph->frag_off = 0;
2750 iplen = 20 + 8 + datalen;
2751 iph->tot_len = htons(iplen);
2752 iph->check = 0;
2753 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2754 skb->protocol = protocol;
2755 skb->mac_header = (skb->network_header - ETH_HLEN -
2756 pkt_dev->pkt_overhead);
2757 skb->dev = odev;
2758 skb->pkt_type = PACKET_HOST;
2759 pktgen_finalize_skb(pkt_dev, skb, datalen);
2760
2761 #ifdef CONFIG_XFRM
2762 if (!process_ipsec(pkt_dev, skb, protocol))
2763 return NULL;
2764 #endif
2765
2766 return skb;
2767 }
2768
2769 /*
2770 * scan_ip6, fmt_ip taken from dietlibc-0.21
2771 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2772 *
2773 * Slightly modified for kernel.
2774 * Should be candidate for net/ipv4/utils.c
2775 * --ro
2776 */
2777
2778 static unsigned int scan_ip6(const char *s, char ip[16])
2779 {
2780 unsigned int i;
2781 unsigned int len = 0;
2782 unsigned long u;
2783 char suffix[16];
2784 unsigned int prefixlen = 0;
2785 unsigned int suffixlen = 0;
2786 __be32 tmp;
2787 char *pos;
2788
2789 for (i = 0; i < 16; i++)
2790 ip[i] = 0;
2791
2792 for (;;) {
2793 if (*s == ':') {
2794 len++;
2795 if (s[1] == ':') { /* Found "::", skip to part 2 */
2796 s += 2;
2797 len++;
2798 break;
2799 }
2800 s++;
2801 }
2802
2803 u = simple_strtoul(s, &pos, 16);
2804 i = pos - s;
2805 if (!i)
2806 return 0;
2807 if (prefixlen == 12 && s[i] == '.') {
2808
2809 /* the last 4 bytes may be written as IPv4 address */
2810
2811 tmp = in_aton(s);
2812 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2813 return i + len;
2814 }
2815 ip[prefixlen++] = (u >> 8);
2816 ip[prefixlen++] = (u & 255);
2817 s += i;
2818 len += i;
2819 if (prefixlen == 16)
2820 return len;
2821 }
2822
2823 /* part 2, after "::" */
2824 for (;;) {
2825 if (*s == ':') {
2826 if (suffixlen == 0)
2827 break;
2828 s++;
2829 len++;
2830 } else if (suffixlen != 0)
2831 break;
2832
2833 u = simple_strtol(s, &pos, 16);
2834 i = pos - s;
2835 if (!i) {
2836 if (*s)
2837 len--;
2838 break;
2839 }
2840 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2841 tmp = in_aton(s);
2842 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2843 sizeof(tmp));
2844 suffixlen += 4;
2845 len += strlen(s);
2846 break;
2847 }
2848 suffix[suffixlen++] = (u >> 8);
2849 suffix[suffixlen++] = (u & 255);
2850 s += i;
2851 len += i;
2852 if (prefixlen + suffixlen == 16)
2853 break;
2854 }
2855 for (i = 0; i < suffixlen; i++)
2856 ip[16 - suffixlen + i] = suffix[i];
2857 return len;
2858 }
2859
2860 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2861 struct pktgen_dev *pkt_dev)
2862 {
2863 struct sk_buff *skb = NULL;
2864 __u8 *eth;
2865 struct udphdr *udph;
2866 int datalen;
2867 struct ipv6hdr *iph;
2868 __be16 protocol = htons(ETH_P_IPV6);
2869 __be32 *mpls;
2870 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2871 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2872 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2873 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2874 u16 queue_map;
2875
2876 if (pkt_dev->nr_labels)
2877 protocol = htons(ETH_P_MPLS_UC);
2878
2879 if (pkt_dev->vlan_id != 0xffff)
2880 protocol = htons(ETH_P_8021Q);
2881
2882 /* Update any of the values, used when we're incrementing various
2883 * fields.
2884 */
2885 mod_cur_headers(pkt_dev);
2886 queue_map = pkt_dev->cur_queue_map;
2887
2888 skb = __netdev_alloc_skb(odev,
2889 pkt_dev->cur_pkt_size + 64
2890 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
2891 if (!skb) {
2892 sprintf(pkt_dev->result, "No memory");
2893 return NULL;
2894 }
2895 prefetchw(skb->data);
2896
2897 skb_reserve(skb, 16);
2898
2899 /* Reserve for ethernet and IP header */
2900 eth = (__u8 *) skb_push(skb, 14);
2901 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2902 if (pkt_dev->nr_labels)
2903 mpls_push(mpls, pkt_dev);
2904
2905 if (pkt_dev->vlan_id != 0xffff) {
2906 if (pkt_dev->svlan_id != 0xffff) {
2907 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2908 *svlan_tci = build_tci(pkt_dev->svlan_id,
2909 pkt_dev->svlan_cfi,
2910 pkt_dev->svlan_p);
2911 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2912 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2913 }
2914 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2915 *vlan_tci = build_tci(pkt_dev->vlan_id,
2916 pkt_dev->vlan_cfi,
2917 pkt_dev->vlan_p);
2918 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2919 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2920 }
2921
2922 skb->network_header = skb->tail;
2923 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2924 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2925 skb_set_queue_mapping(skb, queue_map);
2926 skb->priority = pkt_dev->skb_priority;
2927 iph = ipv6_hdr(skb);
2928 udph = udp_hdr(skb);
2929
2930 memcpy(eth, pkt_dev->hh, 12);
2931 *(__be16 *) &eth[12] = protocol;
2932
2933 /* Eth + IPh + UDPh + mpls */
2934 datalen = pkt_dev->cur_pkt_size - 14 -
2935 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2936 pkt_dev->pkt_overhead;
2937
2938 if (datalen < sizeof(struct pktgen_hdr)) {
2939 datalen = sizeof(struct pktgen_hdr);
2940 if (net_ratelimit())
2941 pr_info("increased datalen to %d\n", datalen);
2942 }
2943
2944 udph->source = htons(pkt_dev->cur_udp_src);
2945 udph->dest = htons(pkt_dev->cur_udp_dst);
2946 udph->len = htons(datalen + sizeof(struct udphdr));
2947 udph->check = 0; /* No checksum */
2948
2949 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2950
2951 if (pkt_dev->traffic_class) {
2952 /* Version + traffic class + flow (0) */
2953 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2954 }
2955
2956 iph->hop_limit = 32;
2957
2958 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2959 iph->nexthdr = IPPROTO_UDP;
2960
2961 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2962 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2963
2964 skb->mac_header = (skb->network_header - ETH_HLEN -
2965 pkt_dev->pkt_overhead);
2966 skb->protocol = protocol;
2967 skb->dev = odev;
2968 skb->pkt_type = PACKET_HOST;
2969
2970 pktgen_finalize_skb(pkt_dev, skb, datalen);
2971
2972 return skb;
2973 }
2974
2975 static struct sk_buff *fill_packet(struct net_device *odev,
2976 struct pktgen_dev *pkt_dev)
2977 {
2978 if (pkt_dev->flags & F_IPV6)
2979 return fill_packet_ipv6(odev, pkt_dev);
2980 else
2981 return fill_packet_ipv4(odev, pkt_dev);
2982 }
2983
2984 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2985 {
2986 pkt_dev->seq_num = 1;
2987 pkt_dev->idle_acc = 0;
2988 pkt_dev->sofar = 0;
2989 pkt_dev->tx_bytes = 0;
2990 pkt_dev->errors = 0;
2991 }
2992
2993 /* Set up structure for sending pkts, clear counters */
2994
2995 static void pktgen_run(struct pktgen_thread *t)
2996 {
2997 struct pktgen_dev *pkt_dev;
2998 int started = 0;
2999
3000 func_enter();
3001
3002 if_lock(t);
3003 list_for_each_entry(pkt_dev, &t->if_list, list) {
3004
3005 /*
3006 * setup odev and create initial packet.
3007 */
3008 pktgen_setup_inject(pkt_dev);
3009
3010 if (pkt_dev->odev) {
3011 pktgen_clear_counters(pkt_dev);
3012 pkt_dev->running = 1; /* Cranke yeself! */
3013 pkt_dev->skb = NULL;
3014 pkt_dev->started_at =
3015 pkt_dev->next_tx = ktime_now();
3016
3017 set_pkt_overhead(pkt_dev);
3018
3019 strcpy(pkt_dev->result, "Starting");
3020 started++;
3021 } else
3022 strcpy(pkt_dev->result, "Error starting");
3023 }
3024 if_unlock(t);
3025 if (started)
3026 t->control &= ~(T_STOP);
3027 }
3028
3029 static void pktgen_stop_all_threads_ifs(void)
3030 {
3031 struct pktgen_thread *t;
3032
3033 func_enter();
3034
3035 mutex_lock(&pktgen_thread_lock);
3036
3037 list_for_each_entry(t, &pktgen_threads, th_list)
3038 t->control |= T_STOP;
3039
3040 mutex_unlock(&pktgen_thread_lock);
3041 }
3042
3043 static int thread_is_running(const struct pktgen_thread *t)
3044 {
3045 const struct pktgen_dev *pkt_dev;
3046
3047 list_for_each_entry(pkt_dev, &t->if_list, list)
3048 if (pkt_dev->running)
3049 return 1;
3050 return 0;
3051 }
3052
3053 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3054 {
3055 if_lock(t);
3056
3057 while (thread_is_running(t)) {
3058
3059 if_unlock(t);
3060
3061 msleep_interruptible(100);
3062
3063 if (signal_pending(current))
3064 goto signal;
3065 if_lock(t);
3066 }
3067 if_unlock(t);
3068 return 1;
3069 signal:
3070 return 0;
3071 }
3072
3073 static int pktgen_wait_all_threads_run(void)
3074 {
3075 struct pktgen_thread *t;
3076 int sig = 1;
3077
3078 mutex_lock(&pktgen_thread_lock);
3079
3080 list_for_each_entry(t, &pktgen_threads, th_list) {
3081 sig = pktgen_wait_thread_run(t);
3082 if (sig == 0)
3083 break;
3084 }
3085
3086 if (sig == 0)
3087 list_for_each_entry(t, &pktgen_threads, th_list)
3088 t->control |= (T_STOP);
3089
3090 mutex_unlock(&pktgen_thread_lock);
3091 return sig;
3092 }
3093
3094 static void pktgen_run_all_threads(void)
3095 {
3096 struct pktgen_thread *t;
3097
3098 func_enter();
3099
3100 mutex_lock(&pktgen_thread_lock);
3101
3102 list_for_each_entry(t, &pktgen_threads, th_list)
3103 t->control |= (T_RUN);
3104
3105 mutex_unlock(&pktgen_thread_lock);
3106
3107 /* Propagate thread->control */
3108 schedule_timeout_interruptible(msecs_to_jiffies(125));
3109
3110 pktgen_wait_all_threads_run();
3111 }
3112
3113 static void pktgen_reset_all_threads(void)
3114 {
3115 struct pktgen_thread *t;
3116
3117 func_enter();
3118
3119 mutex_lock(&pktgen_thread_lock);
3120
3121 list_for_each_entry(t, &pktgen_threads, th_list)
3122 t->control |= (T_REMDEVALL);
3123
3124 mutex_unlock(&pktgen_thread_lock);
3125
3126 /* Propagate thread->control */
3127 schedule_timeout_interruptible(msecs_to_jiffies(125));
3128
3129 pktgen_wait_all_threads_run();
3130 }
3131
3132 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3133 {
3134 __u64 bps, mbps, pps;
3135 char *p = pkt_dev->result;
3136 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3137 pkt_dev->started_at);
3138 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3139
3140 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3141 (unsigned long long)ktime_to_us(elapsed),
3142 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3143 (unsigned long long)ktime_to_us(idle),
3144 (unsigned long long)pkt_dev->sofar,
3145 pkt_dev->cur_pkt_size, nr_frags);
3146
3147 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3148 ktime_to_ns(elapsed));
3149
3150 bps = pps * 8 * pkt_dev->cur_pkt_size;
3151
3152 mbps = bps;
3153 do_div(mbps, 1000000);
3154 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3155 (unsigned long long)pps,
3156 (unsigned long long)mbps,
3157 (unsigned long long)bps,
3158 (unsigned long long)pkt_dev->errors);
3159 }
3160
3161 /* Set stopped-at timer, remove from running list, do counters & statistics */
3162 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3163 {
3164 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3165
3166 if (!pkt_dev->running) {
3167 pr_warning("interface: %s is already stopped\n",
3168 pkt_dev->odevname);
3169 return -EINVAL;
3170 }
3171
3172 kfree_skb(pkt_dev->skb);
3173 pkt_dev->skb = NULL;
3174 pkt_dev->stopped_at = ktime_now();
3175 pkt_dev->running = 0;
3176
3177 show_results(pkt_dev, nr_frags);
3178
3179 return 0;
3180 }
3181
3182 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3183 {
3184 struct pktgen_dev *pkt_dev, *best = NULL;
3185
3186 if_lock(t);
3187
3188 list_for_each_entry(pkt_dev, &t->if_list, list) {
3189 if (!pkt_dev->running)
3190 continue;
3191 if (best == NULL)
3192 best = pkt_dev;
3193 else if (ktime_lt(pkt_dev->next_tx, best->next_tx))
3194 best = pkt_dev;
3195 }
3196 if_unlock(t);
3197 return best;
3198 }
3199
3200 static void pktgen_stop(struct pktgen_thread *t)
3201 {
3202 struct pktgen_dev *pkt_dev;
3203
3204 func_enter();
3205
3206 if_lock(t);
3207
3208 list_for_each_entry(pkt_dev, &t->if_list, list) {
3209 pktgen_stop_device(pkt_dev);
3210 }
3211
3212 if_unlock(t);
3213 }
3214
3215 /*
3216 * one of our devices needs to be removed - find it
3217 * and remove it
3218 */
3219 static void pktgen_rem_one_if(struct pktgen_thread *t)
3220 {
3221 struct list_head *q, *n;
3222 struct pktgen_dev *cur;
3223
3224 func_enter();
3225
3226 if_lock(t);
3227
3228 list_for_each_safe(q, n, &t->if_list) {
3229 cur = list_entry(q, struct pktgen_dev, list);
3230
3231 if (!cur->removal_mark)
3232 continue;
3233
3234 kfree_skb(cur->skb);
3235 cur->skb = NULL;
3236
3237 pktgen_remove_device(t, cur);
3238
3239 break;
3240 }
3241
3242 if_unlock(t);
3243 }
3244
3245 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3246 {
3247 struct list_head *q, *n;
3248 struct pktgen_dev *cur;
3249
3250 func_enter();
3251
3252 /* Remove all devices, free mem */
3253
3254 if_lock(t);
3255
3256 list_for_each_safe(q, n, &t->if_list) {
3257 cur = list_entry(q, struct pktgen_dev, list);
3258
3259 kfree_skb(cur->skb);
3260 cur->skb = NULL;
3261
3262 pktgen_remove_device(t, cur);
3263 }
3264
3265 if_unlock(t);
3266 }
3267
3268 static void pktgen_rem_thread(struct pktgen_thread *t)
3269 {
3270 /* Remove from the thread list */
3271
3272 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3273
3274 }
3275
3276 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3277 {
3278 ktime_t idle_start = ktime_now();
3279 schedule();
3280 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3281 }
3282
3283 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3284 {
3285 ktime_t idle_start = ktime_now();
3286
3287 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3288 if (signal_pending(current))
3289 break;
3290
3291 if (need_resched())
3292 pktgen_resched(pkt_dev);
3293 else
3294 cpu_relax();
3295 }
3296 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3297 }
3298
3299 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3300 {
3301 struct net_device *odev = pkt_dev->odev;
3302 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3303 = odev->netdev_ops->ndo_start_xmit;
3304 struct netdev_queue *txq;
3305 u16 queue_map;
3306 int ret;
3307
3308 /* If device is offline, then don't send */
3309 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3310 pktgen_stop_device(pkt_dev);
3311 return;
3312 }
3313
3314 /* This is max DELAY, this has special meaning of
3315 * "never transmit"
3316 */
3317 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3318 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX);
3319 return;
3320 }
3321
3322 /* If no skb or clone count exhausted then get new one */
3323 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3324 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3325 /* build a new pkt */
3326 kfree_skb(pkt_dev->skb);
3327
3328 pkt_dev->skb = fill_packet(odev, pkt_dev);
3329 if (pkt_dev->skb == NULL) {
3330 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3331 schedule();
3332 pkt_dev->clone_count--; /* back out increment, OOM */
3333 return;
3334 }
3335 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3336 pkt_dev->allocated_skbs++;
3337 pkt_dev->clone_count = 0; /* reset counter */
3338 }
3339
3340 if (pkt_dev->delay && pkt_dev->last_ok)
3341 spin(pkt_dev, pkt_dev->next_tx);
3342
3343 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3344 txq = netdev_get_tx_queue(odev, queue_map);
3345
3346 __netif_tx_lock_bh(txq);
3347
3348 if (unlikely(netif_tx_queue_frozen_or_stopped(txq))) {
3349 ret = NETDEV_TX_BUSY;
3350 pkt_dev->last_ok = 0;
3351 goto unlock;
3352 }
3353 atomic_inc(&(pkt_dev->skb->users));
3354 ret = (*xmit)(pkt_dev->skb, odev);
3355
3356 switch (ret) {
3357 case NETDEV_TX_OK:
3358 txq_trans_update(txq);
3359 pkt_dev->last_ok = 1;
3360 pkt_dev->sofar++;
3361 pkt_dev->seq_num++;
3362 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3363 break;
3364 case NET_XMIT_DROP:
3365 case NET_XMIT_CN:
3366 case NET_XMIT_POLICED:
3367 /* skb has been consumed */
3368 pkt_dev->errors++;
3369 break;
3370 default: /* Drivers are not supposed to return other values! */
3371 if (net_ratelimit())
3372 pr_info("%s xmit error: %d\n", pkt_dev->odevname, ret);
3373 pkt_dev->errors++;
3374 /* fallthru */
3375 case NETDEV_TX_LOCKED:
3376 case NETDEV_TX_BUSY:
3377 /* Retry it next time */
3378 atomic_dec(&(pkt_dev->skb->users));
3379 pkt_dev->last_ok = 0;
3380 }
3381 unlock:
3382 __netif_tx_unlock_bh(txq);
3383
3384 /* If pkt_dev->count is zero, then run forever */
3385 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3386 pktgen_wait_for_skb(pkt_dev);
3387
3388 /* Done with this */
3389 pktgen_stop_device(pkt_dev);
3390 }
3391 }
3392
3393 /*
3394 * Main loop of the thread goes here
3395 */
3396
3397 static int pktgen_thread_worker(void *arg)
3398 {
3399 DEFINE_WAIT(wait);
3400 struct pktgen_thread *t = arg;
3401 struct pktgen_dev *pkt_dev = NULL;
3402 int cpu = t->cpu;
3403
3404 BUG_ON(smp_processor_id() != cpu);
3405
3406 init_waitqueue_head(&t->queue);
3407 complete(&t->start_done);
3408
3409 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3410
3411 set_current_state(TASK_INTERRUPTIBLE);
3412
3413 set_freezable();
3414
3415 while (!kthread_should_stop()) {
3416 pkt_dev = next_to_run(t);
3417
3418 if (unlikely(!pkt_dev && t->control == 0)) {
3419 if (pktgen_exiting)
3420 break;
3421 wait_event_interruptible_timeout(t->queue,
3422 t->control != 0,
3423 HZ/10);
3424 try_to_freeze();
3425 continue;
3426 }
3427
3428 __set_current_state(TASK_RUNNING);
3429
3430 if (likely(pkt_dev)) {
3431 pktgen_xmit(pkt_dev);
3432
3433 if (need_resched())
3434 pktgen_resched(pkt_dev);
3435 else
3436 cpu_relax();
3437 }
3438
3439 if (t->control & T_STOP) {
3440 pktgen_stop(t);
3441 t->control &= ~(T_STOP);
3442 }
3443
3444 if (t->control & T_RUN) {
3445 pktgen_run(t);
3446 t->control &= ~(T_RUN);
3447 }
3448
3449 if (t->control & T_REMDEVALL) {
3450 pktgen_rem_all_ifs(t);
3451 t->control &= ~(T_REMDEVALL);
3452 }
3453
3454 if (t->control & T_REMDEV) {
3455 pktgen_rem_one_if(t);
3456 t->control &= ~(T_REMDEV);
3457 }
3458
3459 try_to_freeze();
3460
3461 set_current_state(TASK_INTERRUPTIBLE);
3462 }
3463
3464 pr_debug("%s stopping all device\n", t->tsk->comm);
3465 pktgen_stop(t);
3466
3467 pr_debug("%s removing all device\n", t->tsk->comm);
3468 pktgen_rem_all_ifs(t);
3469
3470 pr_debug("%s removing thread\n", t->tsk->comm);
3471 pktgen_rem_thread(t);
3472
3473 /* Wait for kthread_stop */
3474 while (!kthread_should_stop()) {
3475 set_current_state(TASK_INTERRUPTIBLE);
3476 schedule();
3477 }
3478 __set_current_state(TASK_RUNNING);
3479
3480 return 0;
3481 }
3482
3483 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3484 const char *ifname, bool exact)
3485 {
3486 struct pktgen_dev *p, *pkt_dev = NULL;
3487 size_t len = strlen(ifname);
3488
3489 if_lock(t);
3490 list_for_each_entry(p, &t->if_list, list)
3491 if (strncmp(p->odevname, ifname, len) == 0) {
3492 if (p->odevname[len]) {
3493 if (exact || p->odevname[len] != '@')
3494 continue;
3495 }
3496 pkt_dev = p;
3497 break;
3498 }
3499
3500 if_unlock(t);
3501 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3502 return pkt_dev;
3503 }
3504
3505 /*
3506 * Adds a dev at front of if_list.
3507 */
3508
3509 static int add_dev_to_thread(struct pktgen_thread *t,
3510 struct pktgen_dev *pkt_dev)
3511 {
3512 int rv = 0;
3513
3514 if_lock(t);
3515
3516 if (pkt_dev->pg_thread) {
3517 pr_err("ERROR: already assigned to a thread\n");
3518 rv = -EBUSY;
3519 goto out;
3520 }
3521
3522 list_add(&pkt_dev->list, &t->if_list);
3523 pkt_dev->pg_thread = t;
3524 pkt_dev->running = 0;
3525
3526 out:
3527 if_unlock(t);
3528 return rv;
3529 }
3530
3531 /* Called under thread lock */
3532
3533 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3534 {
3535 struct pktgen_dev *pkt_dev;
3536 int err;
3537 int node = cpu_to_node(t->cpu);
3538
3539 /* We don't allow a device to be on several threads */
3540
3541 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3542 if (pkt_dev) {
3543 pr_err("ERROR: interface already used\n");
3544 return -EBUSY;
3545 }
3546
3547 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3548 if (!pkt_dev)
3549 return -ENOMEM;
3550
3551 strcpy(pkt_dev->odevname, ifname);
3552 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3553 node);
3554 if (pkt_dev->flows == NULL) {
3555 kfree(pkt_dev);
3556 return -ENOMEM;
3557 }
3558
3559 pkt_dev->removal_mark = 0;
3560 pkt_dev->min_pkt_size = ETH_ZLEN;
3561 pkt_dev->max_pkt_size = ETH_ZLEN;
3562 pkt_dev->nfrags = 0;
3563 pkt_dev->delay = pg_delay_d;
3564 pkt_dev->count = pg_count_d;
3565 pkt_dev->sofar = 0;
3566 pkt_dev->udp_src_min = 9; /* sink port */
3567 pkt_dev->udp_src_max = 9;
3568 pkt_dev->udp_dst_min = 9;
3569 pkt_dev->udp_dst_max = 9;
3570 pkt_dev->vlan_p = 0;
3571 pkt_dev->vlan_cfi = 0;
3572 pkt_dev->vlan_id = 0xffff;
3573 pkt_dev->svlan_p = 0;
3574 pkt_dev->svlan_cfi = 0;
3575 pkt_dev->svlan_id = 0xffff;
3576 pkt_dev->node = -1;
3577
3578 err = pktgen_setup_dev(pkt_dev, ifname);
3579 if (err)
3580 goto out1;
3581 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3582 pkt_dev->clone_skb = pg_clone_skb_d;
3583
3584 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3585 &pktgen_if_fops, pkt_dev);
3586 if (!pkt_dev->entry) {
3587 pr_err("cannot create %s/%s procfs entry\n",
3588 PG_PROC_DIR, ifname);
3589 err = -EINVAL;
3590 goto out2;
3591 }
3592 #ifdef CONFIG_XFRM
3593 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3594 pkt_dev->ipsproto = IPPROTO_ESP;
3595 #endif
3596
3597 return add_dev_to_thread(t, pkt_dev);
3598 out2:
3599 dev_put(pkt_dev->odev);
3600 out1:
3601 #ifdef CONFIG_XFRM
3602 free_SAs(pkt_dev);
3603 #endif
3604 vfree(pkt_dev->flows);
3605 kfree(pkt_dev);
3606 return err;
3607 }
3608
3609 static int __init pktgen_create_thread(int cpu)
3610 {
3611 struct pktgen_thread *t;
3612 struct proc_dir_entry *pe;
3613 struct task_struct *p;
3614
3615 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3616 cpu_to_node(cpu));
3617 if (!t) {
3618 pr_err("ERROR: out of memory, can't create new thread\n");
3619 return -ENOMEM;
3620 }
3621
3622 spin_lock_init(&t->if_lock);
3623 t->cpu = cpu;
3624
3625 INIT_LIST_HEAD(&t->if_list);
3626
3627 list_add_tail(&t->th_list, &pktgen_threads);
3628 init_completion(&t->start_done);
3629
3630 p = kthread_create_on_node(pktgen_thread_worker,
3631 t,
3632 cpu_to_node(cpu),
3633 "kpktgend_%d", cpu);
3634 if (IS_ERR(p)) {
3635 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3636 list_del(&t->th_list);
3637 kfree(t);
3638 return PTR_ERR(p);
3639 }
3640 kthread_bind(p, cpu);
3641 t->tsk = p;
3642
3643 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3644 &pktgen_thread_fops, t);
3645 if (!pe) {
3646 pr_err("cannot create %s/%s procfs entry\n",
3647 PG_PROC_DIR, t->tsk->comm);
3648 kthread_stop(p);
3649 list_del(&t->th_list);
3650 kfree(t);
3651 return -EINVAL;
3652 }
3653
3654 wake_up_process(p);
3655 wait_for_completion(&t->start_done);
3656
3657 return 0;
3658 }
3659
3660 /*
3661 * Removes a device from the thread if_list.
3662 */
3663 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3664 struct pktgen_dev *pkt_dev)
3665 {
3666 struct list_head *q, *n;
3667 struct pktgen_dev *p;
3668
3669 list_for_each_safe(q, n, &t->if_list) {
3670 p = list_entry(q, struct pktgen_dev, list);
3671 if (p == pkt_dev)
3672 list_del(&p->list);
3673 }
3674 }
3675
3676 static int pktgen_remove_device(struct pktgen_thread *t,
3677 struct pktgen_dev *pkt_dev)
3678 {
3679
3680 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3681
3682 if (pkt_dev->running) {
3683 pr_warning("WARNING: trying to remove a running interface, stopping it now\n");
3684 pktgen_stop_device(pkt_dev);
3685 }
3686
3687 /* Dis-associate from the interface */
3688
3689 if (pkt_dev->odev) {
3690 dev_put(pkt_dev->odev);
3691 pkt_dev->odev = NULL;
3692 }
3693
3694 /* And update the thread if_list */
3695
3696 _rem_dev_from_if_list(t, pkt_dev);
3697
3698 if (pkt_dev->entry)
3699 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3700
3701 #ifdef CONFIG_XFRM
3702 free_SAs(pkt_dev);
3703 #endif
3704 vfree(pkt_dev->flows);
3705 if (pkt_dev->page)
3706 put_page(pkt_dev->page);
3707 kfree(pkt_dev);
3708 return 0;
3709 }
3710
3711 static int __init pg_init(void)
3712 {
3713 int cpu;
3714 struct proc_dir_entry *pe;
3715 int ret = 0;
3716
3717 pr_info("%s", version);
3718
3719 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3720 if (!pg_proc_dir)
3721 return -ENODEV;
3722
3723 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3724 if (pe == NULL) {
3725 pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL);
3726 ret = -EINVAL;
3727 goto remove_dir;
3728 }
3729
3730 register_netdevice_notifier(&pktgen_notifier_block);
3731
3732 for_each_online_cpu(cpu) {
3733 int err;
3734
3735 err = pktgen_create_thread(cpu);
3736 if (err)
3737 pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n",
3738 cpu, err);
3739 }
3740
3741 if (list_empty(&pktgen_threads)) {
3742 pr_err("ERROR: Initialization failed for all threads\n");
3743 ret = -ENODEV;
3744 goto unregister;
3745 }
3746
3747 return 0;
3748
3749 unregister:
3750 unregister_netdevice_notifier(&pktgen_notifier_block);
3751 remove_proc_entry(PGCTRL, pg_proc_dir);
3752 remove_dir:
3753 proc_net_remove(&init_net, PG_PROC_DIR);
3754 return ret;
3755 }
3756
3757 static void __exit pg_cleanup(void)
3758 {
3759 struct pktgen_thread *t;
3760 struct list_head *q, *n;
3761
3762 /* Stop all interfaces & threads */
3763 pktgen_exiting = true;
3764
3765 list_for_each_safe(q, n, &pktgen_threads) {
3766 t = list_entry(q, struct pktgen_thread, th_list);
3767 kthread_stop(t->tsk);
3768 kfree(t);
3769 }
3770
3771 /* Un-register us from receiving netdevice events */
3772 unregister_netdevice_notifier(&pktgen_notifier_block);
3773
3774 /* Clean up proc file system */
3775 remove_proc_entry(PGCTRL, pg_proc_dir);
3776 proc_net_remove(&init_net, PG_PROC_DIR);
3777 }
3778
3779 module_init(pg_init);
3780 module_exit(pg_cleanup);
3781
3782 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3783 MODULE_DESCRIPTION("Packet Generator tool");
3784 MODULE_LICENSE("GPL");
3785 MODULE_VERSION(VERSION);
3786 module_param(pg_count_d, int, 0);
3787 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3788 module_param(pg_delay_d, int, 0);
3789 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3790 module_param(pg_clone_skb_d, int, 0);
3791 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3792 module_param(debug, int, 0);
3793 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
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