projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetoot...
[deliverable/linux.git] / net / core / pktgen.c
1 /*
2 * Authors:
3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
4 * Uppsala University and
5 * Swedish University of Agricultural Sciences
6 *
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 * Ben Greear <greearb@candelatech.com>
9 * Jens Låås <jens.laas@data.slu.se>
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 *
16 *
17 * A tool for loading the network with preconfigurated packets.
18 * The tool is implemented as a linux module. Parameters are output
19 * device, delay (to hard_xmit), number of packets, and whether
20 * to use multiple SKBs or just the same one.
21 * pktgen uses the installed interface's output routine.
22 *
23 * Additional hacking by:
24 *
25 * Jens.Laas@data.slu.se
26 * Improved by ANK. 010120.
27 * Improved by ANK even more. 010212.
28 * MAC address typo fixed. 010417 --ro
29 * Integrated. 020301 --DaveM
30 * Added multiskb option 020301 --DaveM
31 * Scaling of results. 020417--sigurdur@linpro.no
32 * Significant re-work of the module:
33 * * Convert to threaded model to more efficiently be able to transmit
34 * and receive on multiple interfaces at once.
35 * * Converted many counters to __u64 to allow longer runs.
36 * * Allow configuration of ranges, like min/max IP address, MACs,
37 * and UDP-ports, for both source and destination, and can
38 * set to use a random distribution or sequentially walk the range.
39 * * Can now change most values after starting.
40 * * Place 12-byte packet in UDP payload with magic number,
41 * sequence number, and timestamp.
42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and
43 * latencies (with micro-second) precision.
44 * * Add IOCTL interface to easily get counters & configuration.
45 * --Ben Greear <greearb@candelatech.com>
46 *
47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
49 * as a "fastpath" with a configurable number of clones after alloc's.
50 * clone_skb=0 means all packets are allocated this also means ranges time
51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
52 * clones.
53 *
54 * Also moved to /proc/net/pktgen/
55 * --ro
56 *
57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
58 * mistakes. Also merged in DaveM's patch in the -pre6 patch.
59 * --Ben Greear <greearb@candelatech.com>
60 *
61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
62 *
63 *
64 * 021124 Finished major redesign and rewrite for new functionality.
65 * See Documentation/networking/pktgen.txt for how to use this.
66 *
67 * The new operation:
68 * For each CPU one thread/process is created at start. This process checks
69 * for running devices in the if_list and sends packets until count is 0 it
70 * also the thread checks the thread->control which is used for inter-process
71 * communication. controlling process "posts" operations to the threads this
72 * way.
73 * The if_list is RCU protected, and the if_lock remains to protect updating
74 * of if_list, from "add_device" as it invoked from userspace (via proc write).
75 *
76 * By design there should only be *one* "controlling" process. In practice
77 * multiple write accesses gives unpredictable result. Understood by "write"
78 * to /proc gives result code thats should be read be the "writer".
79 * For practical use this should be no problem.
80 *
81 * Note when adding devices to a specific CPU there good idea to also assign
82 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
83 * --ro
84 *
85 * Fix refcount off by one if first packet fails, potential null deref,
86 * memleak 030710- KJP
87 *
88 * First "ranges" functionality for ipv6 030726 --ro
89 *
90 * Included flow support. 030802 ANK.
91 *
92 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
93 *
94 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
95 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
96 *
97 * New xmit() return, do_div and misc clean up by Stephen Hemminger
98 * <shemminger@osdl.org> 040923
99 *
100 * Randy Dunlap fixed u64 printk compiler warning
101 *
102 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
103 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
104 *
105 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
106 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
107 *
108 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
109 * 050103
110 *
111 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
112 *
113 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
114 *
115 * Fixed src_mac command to set source mac of packet to value specified in
116 * command by Adit Ranadive <adit.262@gmail.com>
117 *
118 */
119
120 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
121
122 #include <linux/sys.h>
123 #include <linux/types.h>
124 #include <linux/module.h>
125 #include <linux/moduleparam.h>
126 #include <linux/kernel.h>
127 #include <linux/mutex.h>
128 #include <linux/sched.h>
129 #include <linux/slab.h>
130 #include <linux/vmalloc.h>
131 #include <linux/unistd.h>
132 #include <linux/string.h>
133 #include <linux/ptrace.h>
134 #include <linux/errno.h>
135 #include <linux/ioport.h>
136 #include <linux/interrupt.h>
137 #include <linux/capability.h>
138 #include <linux/hrtimer.h>
139 #include <linux/freezer.h>
140 #include <linux/delay.h>
141 #include <linux/timer.h>
142 #include <linux/list.h>
143 #include <linux/init.h>
144 #include <linux/skbuff.h>
145 #include <linux/netdevice.h>
146 #include <linux/inet.h>
147 #include <linux/inetdevice.h>
148 #include <linux/rtnetlink.h>
149 #include <linux/if_arp.h>
150 #include <linux/if_vlan.h>
151 #include <linux/in.h>
152 #include <linux/ip.h>
153 #include <linux/ipv6.h>
154 #include <linux/udp.h>
155 #include <linux/proc_fs.h>
156 #include <linux/seq_file.h>
157 #include <linux/wait.h>
158 #include <linux/etherdevice.h>
159 #include <linux/kthread.h>
160 #include <linux/prefetch.h>
161 #include <net/net_namespace.h>
162 #include <net/checksum.h>
163 #include <net/ipv6.h>
164 #include <net/udp.h>
165 #include <net/ip6_checksum.h>
166 #include <net/addrconf.h>
167 #ifdef CONFIG_XFRM
168 #include <net/xfrm.h>
169 #endif
170 #include <net/netns/generic.h>
171 #include <asm/byteorder.h>
172 #include <linux/rcupdate.h>
173 #include <linux/bitops.h>
174 #include <linux/io.h>
175 #include <linux/timex.h>
176 #include <linux/uaccess.h>
177 #include <asm/dma.h>
178 #include <asm/div64.h> /* do_div */
179
180 #define VERSION "2.75"
181 #define IP_NAME_SZ 32
182 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
183 #define MPLS_STACK_BOTTOM htonl(0x00000100)
184
185 #define func_enter() pr_debug("entering %s\n", __func__);
186
187 /* Device flag bits */
188 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
189 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
190 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
191 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
192 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
193 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
194 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
195 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
196 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
197 #define F_VID_RND (1<<9) /* Random VLAN ID */
198 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
199 #define F_FLOW_SEQ (1<<11) /* Sequential flows */
200 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */
201 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
202 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
203 #define F_NODE (1<<15) /* Node memory alloc*/
204 #define F_UDPCSUM (1<<16) /* Include UDP checksum */
205 #define F_NO_TIMESTAMP (1<<17) /* Don't timestamp packets (default TS) */
206
207 /* Thread control flag bits */
208 #define T_STOP (1<<0) /* Stop run */
209 #define T_RUN (1<<1) /* Start run */
210 #define T_REMDEVALL (1<<2) /* Remove all devs */
211 #define T_REMDEV (1<<3) /* Remove one dev */
212
213 /* Xmit modes */
214 #define M_START_XMIT 0 /* Default normal TX */
215 #define M_NETIF_RECEIVE 1 /* Inject packets into stack */
216
217 /* If lock -- protects updating of if_list */
218 #define if_lock(t) spin_lock(&(t->if_lock));
219 #define if_unlock(t) spin_unlock(&(t->if_lock));
220
221 /* Used to help with determining the pkts on receive */
222 #define PKTGEN_MAGIC 0xbe9be955
223 #define PG_PROC_DIR "pktgen"
224 #define PGCTRL "pgctrl"
225
226 #define MAX_CFLOWS 65536
227
228 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
229 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
230
231 struct flow_state {
232 __be32 cur_daddr;
233 int count;
234 #ifdef CONFIG_XFRM
235 struct xfrm_state *x;
236 #endif
237 __u32 flags;
238 };
239
240 /* flow flag bits */
241 #define F_INIT (1<<0) /* flow has been initialized */
242
243 struct pktgen_dev {
244 /*
245 * Try to keep frequent/infrequent used vars. separated.
246 */
247 struct proc_dir_entry *entry; /* proc file */
248 struct pktgen_thread *pg_thread;/* the owner */
249 struct list_head list; /* chaining in the thread's run-queue */
250 struct rcu_head rcu; /* freed by RCU */
251
252 int running; /* if false, the test will stop */
253
254 /* If min != max, then we will either do a linear iteration, or
255 * we will do a random selection from within the range.
256 */
257 __u32 flags;
258 int xmit_mode;
259 int min_pkt_size;
260 int max_pkt_size;
261 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
262 int nfrags;
263 int removal_mark; /* non-zero => the device is marked for
264 * removal by worker thread */
265
266 struct page *page;
267 u64 delay; /* nano-seconds */
268
269 __u64 count; /* Default No packets to send */
270 __u64 sofar; /* How many pkts we've sent so far */
271 __u64 tx_bytes; /* How many bytes we've transmitted */
272 __u64 errors; /* Errors when trying to transmit, */
273
274 /* runtime counters relating to clone_skb */
275
276 __u64 allocated_skbs;
277 __u32 clone_count;
278 int last_ok; /* Was last skb sent?
279 * Or a failed transmit of some sort?
280 * This will keep sequence numbers in order
281 */
282 ktime_t next_tx;
283 ktime_t started_at;
284 ktime_t stopped_at;
285 u64 idle_acc; /* nano-seconds */
286
287 __u32 seq_num;
288
289 int clone_skb; /*
290 * Use multiple SKBs during packet gen.
291 * If this number is greater than 1, then
292 * that many copies of the same packet will be
293 * sent before a new packet is allocated.
294 * If you want to send 1024 identical packets
295 * before creating a new packet,
296 * set clone_skb to 1024.
297 */
298
299 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
300 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
301 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
302 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
303
304 struct in6_addr in6_saddr;
305 struct in6_addr in6_daddr;
306 struct in6_addr cur_in6_daddr;
307 struct in6_addr cur_in6_saddr;
308 /* For ranges */
309 struct in6_addr min_in6_daddr;
310 struct in6_addr max_in6_daddr;
311 struct in6_addr min_in6_saddr;
312 struct in6_addr max_in6_saddr;
313
314 /* If we're doing ranges, random or incremental, then this
315 * defines the min/max for those ranges.
316 */
317 __be32 saddr_min; /* inclusive, source IP address */
318 __be32 saddr_max; /* exclusive, source IP address */
319 __be32 daddr_min; /* inclusive, dest IP address */
320 __be32 daddr_max; /* exclusive, dest IP address */
321
322 __u16 udp_src_min; /* inclusive, source UDP port */
323 __u16 udp_src_max; /* exclusive, source UDP port */
324 __u16 udp_dst_min; /* inclusive, dest UDP port */
325 __u16 udp_dst_max; /* exclusive, dest UDP port */
326
327 /* DSCP + ECN */
328 __u8 tos; /* six MSB of (former) IPv4 TOS
329 are for dscp codepoint */
330 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
331 (see RFC 3260, sec. 4) */
332
333 /* MPLS */
334 unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */
335 __be32 labels[MAX_MPLS_LABELS];
336
337 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
338 __u8 vlan_p;
339 __u8 vlan_cfi;
340 __u16 vlan_id; /* 0xffff means no vlan tag */
341
342 __u8 svlan_p;
343 __u8 svlan_cfi;
344 __u16 svlan_id; /* 0xffff means no svlan tag */
345
346 __u32 src_mac_count; /* How many MACs to iterate through */
347 __u32 dst_mac_count; /* How many MACs to iterate through */
348
349 unsigned char dst_mac[ETH_ALEN];
350 unsigned char src_mac[ETH_ALEN];
351
352 __u32 cur_dst_mac_offset;
353 __u32 cur_src_mac_offset;
354 __be32 cur_saddr;
355 __be32 cur_daddr;
356 __u16 ip_id;
357 __u16 cur_udp_dst;
358 __u16 cur_udp_src;
359 __u16 cur_queue_map;
360 __u32 cur_pkt_size;
361 __u32 last_pkt_size;
362
363 __u8 hh[14];
364 /* = {
365 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
366
367 We fill in SRC address later
368 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
369 0x08, 0x00
370 };
371 */
372 __u16 pad; /* pad out the hh struct to an even 16 bytes */
373
374 struct sk_buff *skb; /* skb we are to transmit next, used for when we
375 * are transmitting the same one multiple times
376 */
377 struct net_device *odev; /* The out-going device.
378 * Note that the device should have it's
379 * pg_info pointer pointing back to this
380 * device.
381 * Set when the user specifies the out-going
382 * device name (not when the inject is
383 * started as it used to do.)
384 */
385 char odevname[32];
386 struct flow_state *flows;
387 unsigned int cflows; /* Concurrent flows (config) */
388 unsigned int lflow; /* Flow length (config) */
389 unsigned int nflows; /* accumulated flows (stats) */
390 unsigned int curfl; /* current sequenced flow (state)*/
391
392 u16 queue_map_min;
393 u16 queue_map_max;
394 __u32 skb_priority; /* skb priority field */
395 unsigned int burst; /* number of duplicated packets to burst */
396 int node; /* Memory node */
397
398 #ifdef CONFIG_XFRM
399 __u8 ipsmode; /* IPSEC mode (config) */
400 __u8 ipsproto; /* IPSEC type (config) */
401 __u32 spi;
402 struct dst_entry dst;
403 struct dst_ops dstops;
404 #endif
405 char result[512];
406 };
407
408 struct pktgen_hdr {
409 __be32 pgh_magic;
410 __be32 seq_num;
411 __be32 tv_sec;
412 __be32 tv_usec;
413 };
414
415
416 static int pg_net_id __read_mostly;
417
418 struct pktgen_net {
419 struct net *net;
420 struct proc_dir_entry *proc_dir;
421 struct list_head pktgen_threads;
422 bool pktgen_exiting;
423 };
424
425 struct pktgen_thread {
426 spinlock_t if_lock; /* for list of devices */
427 struct list_head if_list; /* All device here */
428 struct list_head th_list;
429 struct task_struct *tsk;
430 char result[512];
431
432 /* Field for thread to receive "posted" events terminate,
433 stop ifs etc. */
434
435 u32 control;
436 int cpu;
437
438 wait_queue_head_t queue;
439 struct completion start_done;
440 struct pktgen_net *net;
441 };
442
443 #define REMOVE 1
444 #define FIND 0
445
446 static const char version[] =
447 "Packet Generator for packet performance testing. "
448 "Version: " VERSION "\n";
449
450 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
451 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
452 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
453 const char *ifname, bool exact);
454 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
455 static void pktgen_run_all_threads(struct pktgen_net *pn);
456 static void pktgen_reset_all_threads(struct pktgen_net *pn);
457 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn);
458
459 static void pktgen_stop(struct pktgen_thread *t);
460 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
461
462 /* Module parameters, defaults. */
463 static int pg_count_d __read_mostly = 1000;
464 static int pg_delay_d __read_mostly;
465 static int pg_clone_skb_d __read_mostly;
466 static int debug __read_mostly;
467
468 static DEFINE_MUTEX(pktgen_thread_lock);
469
470 static struct notifier_block pktgen_notifier_block = {
471 .notifier_call = pktgen_device_event,
472 };
473
474 /*
475 * /proc handling functions
476 *
477 */
478
479 static int pgctrl_show(struct seq_file *seq, void *v)
480 {
481 seq_puts(seq, version);
482 return 0;
483 }
484
485 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
486 size_t count, loff_t *ppos)
487 {
488 char data[128];
489 struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
490
491 if (!capable(CAP_NET_ADMIN))
492 return -EPERM;
493
494 if (count == 0)
495 return -EINVAL;
496
497 if (count > sizeof(data))
498 count = sizeof(data);
499
500 if (copy_from_user(data, buf, count))
501 return -EFAULT;
502
503 data[count - 1] = 0; /* Strip trailing '\n' and terminate string */
504
505 if (!strcmp(data, "stop"))
506 pktgen_stop_all_threads_ifs(pn);
507
508 else if (!strcmp(data, "start"))
509 pktgen_run_all_threads(pn);
510
511 else if (!strcmp(data, "reset"))
512 pktgen_reset_all_threads(pn);
513
514 else
515 return -EINVAL;
516
517 return count;
518 }
519
520 static int pgctrl_open(struct inode *inode, struct file *file)
521 {
522 return single_open(file, pgctrl_show, PDE_DATA(inode));
523 }
524
525 static const struct file_operations pktgen_fops = {
526 .owner = THIS_MODULE,
527 .open = pgctrl_open,
528 .read = seq_read,
529 .llseek = seq_lseek,
530 .write = pgctrl_write,
531 .release = single_release,
532 };
533
534 static int pktgen_if_show(struct seq_file *seq, void *v)
535 {
536 const struct pktgen_dev *pkt_dev = seq->private;
537 ktime_t stopped;
538 u64 idle;
539
540 seq_printf(seq,
541 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
542 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
543 pkt_dev->max_pkt_size);
544
545 seq_printf(seq,
546 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
547 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
548 pkt_dev->clone_skb, pkt_dev->odevname);
549
550 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
551 pkt_dev->lflow);
552
553 seq_printf(seq,
554 " queue_map_min: %u queue_map_max: %u\n",
555 pkt_dev->queue_map_min,
556 pkt_dev->queue_map_max);
557
558 if (pkt_dev->skb_priority)
559 seq_printf(seq, " skb_priority: %u\n",
560 pkt_dev->skb_priority);
561
562 if (pkt_dev->flags & F_IPV6) {
563 seq_printf(seq,
564 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
565 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
566 &pkt_dev->in6_saddr,
567 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
568 &pkt_dev->in6_daddr,
569 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
570 } else {
571 seq_printf(seq,
572 " dst_min: %s dst_max: %s\n",
573 pkt_dev->dst_min, pkt_dev->dst_max);
574 seq_printf(seq,
575 " src_min: %s src_max: %s\n",
576 pkt_dev->src_min, pkt_dev->src_max);
577 }
578
579 seq_puts(seq, " src_mac: ");
580
581 seq_printf(seq, "%pM ",
582 is_zero_ether_addr(pkt_dev->src_mac) ?
583 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
584
585 seq_puts(seq, "dst_mac: ");
586 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
587
588 seq_printf(seq,
589 " udp_src_min: %d udp_src_max: %d"
590 " udp_dst_min: %d udp_dst_max: %d\n",
591 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
592 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
593
594 seq_printf(seq,
595 " src_mac_count: %d dst_mac_count: %d\n",
596 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
597
598 if (pkt_dev->nr_labels) {
599 unsigned int i;
600 seq_puts(seq, " mpls: ");
601 for (i = 0; i < pkt_dev->nr_labels; i++)
602 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
603 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
604 }
605
606 if (pkt_dev->vlan_id != 0xffff)
607 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
608 pkt_dev->vlan_id, pkt_dev->vlan_p,
609 pkt_dev->vlan_cfi);
610
611 if (pkt_dev->svlan_id != 0xffff)
612 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
613 pkt_dev->svlan_id, pkt_dev->svlan_p,
614 pkt_dev->svlan_cfi);
615
616 if (pkt_dev->tos)
617 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
618
619 if (pkt_dev->traffic_class)
620 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
621
622 if (pkt_dev->burst > 1)
623 seq_printf(seq, " burst: %d\n", pkt_dev->burst);
624
625 if (pkt_dev->node >= 0)
626 seq_printf(seq, " node: %d\n", pkt_dev->node);
627
628 if (pkt_dev->xmit_mode == M_NETIF_RECEIVE)
629 seq_puts(seq, " xmit_mode: netif_receive\n");
630
631 seq_puts(seq, " Flags: ");
632
633 if (pkt_dev->flags & F_IPV6)
634 seq_puts(seq, "IPV6 ");
635
636 if (pkt_dev->flags & F_IPSRC_RND)
637 seq_puts(seq, "IPSRC_RND ");
638
639 if (pkt_dev->flags & F_IPDST_RND)
640 seq_puts(seq, "IPDST_RND ");
641
642 if (pkt_dev->flags & F_TXSIZE_RND)
643 seq_puts(seq, "TXSIZE_RND ");
644
645 if (pkt_dev->flags & F_UDPSRC_RND)
646 seq_puts(seq, "UDPSRC_RND ");
647
648 if (pkt_dev->flags & F_UDPDST_RND)
649 seq_puts(seq, "UDPDST_RND ");
650
651 if (pkt_dev->flags & F_UDPCSUM)
652 seq_puts(seq, "UDPCSUM ");
653
654 if (pkt_dev->flags & F_NO_TIMESTAMP)
655 seq_puts(seq, "NO_TIMESTAMP ");
656
657 if (pkt_dev->flags & F_MPLS_RND)
658 seq_puts(seq, "MPLS_RND ");
659
660 if (pkt_dev->flags & F_QUEUE_MAP_RND)
661 seq_puts(seq, "QUEUE_MAP_RND ");
662
663 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
664 seq_puts(seq, "QUEUE_MAP_CPU ");
665
666 if (pkt_dev->cflows) {
667 if (pkt_dev->flags & F_FLOW_SEQ)
668 seq_puts(seq, "FLOW_SEQ "); /*in sequence flows*/
669 else
670 seq_puts(seq, "FLOW_RND ");
671 }
672
673 #ifdef CONFIG_XFRM
674 if (pkt_dev->flags & F_IPSEC_ON) {
675 seq_puts(seq, "IPSEC ");
676 if (pkt_dev->spi)
677 seq_printf(seq, "spi:%u", pkt_dev->spi);
678 }
679 #endif
680
681 if (pkt_dev->flags & F_MACSRC_RND)
682 seq_puts(seq, "MACSRC_RND ");
683
684 if (pkt_dev->flags & F_MACDST_RND)
685 seq_puts(seq, "MACDST_RND ");
686
687 if (pkt_dev->flags & F_VID_RND)
688 seq_puts(seq, "VID_RND ");
689
690 if (pkt_dev->flags & F_SVID_RND)
691 seq_puts(seq, "SVID_RND ");
692
693 if (pkt_dev->flags & F_NODE)
694 seq_puts(seq, "NODE_ALLOC ");
695
696 seq_puts(seq, "\n");
697
698 /* not really stopped, more like last-running-at */
699 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at;
700 idle = pkt_dev->idle_acc;
701 do_div(idle, NSEC_PER_USEC);
702
703 seq_printf(seq,
704 "Current:\n pkts-sofar: %llu errors: %llu\n",
705 (unsigned long long)pkt_dev->sofar,
706 (unsigned long long)pkt_dev->errors);
707
708 seq_printf(seq,
709 " started: %lluus stopped: %lluus idle: %lluus\n",
710 (unsigned long long) ktime_to_us(pkt_dev->started_at),
711 (unsigned long long) ktime_to_us(stopped),
712 (unsigned long long) idle);
713
714 seq_printf(seq,
715 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
716 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
717 pkt_dev->cur_src_mac_offset);
718
719 if (pkt_dev->flags & F_IPV6) {
720 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
721 &pkt_dev->cur_in6_saddr,
722 &pkt_dev->cur_in6_daddr);
723 } else
724 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n",
725 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
726
727 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
728 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
729
730 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
731
732 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
733
734 if (pkt_dev->result[0])
735 seq_printf(seq, "Result: %s\n", pkt_dev->result);
736 else
737 seq_puts(seq, "Result: Idle\n");
738
739 return 0;
740 }
741
742
743 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
744 __u32 *num)
745 {
746 int i = 0;
747 *num = 0;
748
749 for (; i < maxlen; i++) {
750 int value;
751 char c;
752 *num <<= 4;
753 if (get_user(c, &user_buffer[i]))
754 return -EFAULT;
755 value = hex_to_bin(c);
756 if (value >= 0)
757 *num |= value;
758 else
759 break;
760 }
761 return i;
762 }
763
764 static int count_trail_chars(const char __user * user_buffer,
765 unsigned int maxlen)
766 {
767 int i;
768
769 for (i = 0; i < maxlen; i++) {
770 char c;
771 if (get_user(c, &user_buffer[i]))
772 return -EFAULT;
773 switch (c) {
774 case '\"':
775 case '\n':
776 case '\r':
777 case '\t':
778 case ' ':
779 case '=':
780 break;
781 default:
782 goto done;
783 }
784 }
785 done:
786 return i;
787 }
788
789 static long num_arg(const char __user *user_buffer, unsigned long maxlen,
790 unsigned long *num)
791 {
792 int i;
793 *num = 0;
794
795 for (i = 0; i < maxlen; i++) {
796 char c;
797 if (get_user(c, &user_buffer[i]))
798 return -EFAULT;
799 if ((c >= '0') && (c <= '9')) {
800 *num *= 10;
801 *num += c - '0';
802 } else
803 break;
804 }
805 return i;
806 }
807
808 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
809 {
810 int i;
811
812 for (i = 0; i < maxlen; i++) {
813 char c;
814 if (get_user(c, &user_buffer[i]))
815 return -EFAULT;
816 switch (c) {
817 case '\"':
818 case '\n':
819 case '\r':
820 case '\t':
821 case ' ':
822 goto done_str;
823 default:
824 break;
825 }
826 }
827 done_str:
828 return i;
829 }
830
831 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
832 {
833 unsigned int n = 0;
834 char c;
835 ssize_t i = 0;
836 int len;
837
838 pkt_dev->nr_labels = 0;
839 do {
840 __u32 tmp;
841 len = hex32_arg(&buffer[i], 8, &tmp);
842 if (len <= 0)
843 return len;
844 pkt_dev->labels[n] = htonl(tmp);
845 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
846 pkt_dev->flags |= F_MPLS_RND;
847 i += len;
848 if (get_user(c, &buffer[i]))
849 return -EFAULT;
850 i++;
851 n++;
852 if (n >= MAX_MPLS_LABELS)
853 return -E2BIG;
854 } while (c == ',');
855
856 pkt_dev->nr_labels = n;
857 return i;
858 }
859
860 static ssize_t pktgen_if_write(struct file *file,
861 const char __user * user_buffer, size_t count,
862 loff_t * offset)
863 {
864 struct seq_file *seq = file->private_data;
865 struct pktgen_dev *pkt_dev = seq->private;
866 int i, max, len;
867 char name[16], valstr[32];
868 unsigned long value = 0;
869 char *pg_result = NULL;
870 int tmp = 0;
871 char buf[128];
872
873 pg_result = &(pkt_dev->result[0]);
874
875 if (count < 1) {
876 pr_warn("wrong command format\n");
877 return -EINVAL;
878 }
879
880 max = count;
881 tmp = count_trail_chars(user_buffer, max);
882 if (tmp < 0) {
883 pr_warn("illegal format\n");
884 return tmp;
885 }
886 i = tmp;
887
888 /* Read variable name */
889
890 len = strn_len(&user_buffer[i], sizeof(name) - 1);
891 if (len < 0)
892 return len;
893
894 memset(name, 0, sizeof(name));
895 if (copy_from_user(name, &user_buffer[i], len))
896 return -EFAULT;
897 i += len;
898
899 max = count - i;
900 len = count_trail_chars(&user_buffer[i], max);
901 if (len < 0)
902 return len;
903
904 i += len;
905
906 if (debug) {
907 size_t copy = min_t(size_t, count, 1023);
908 char tb[copy + 1];
909 if (copy_from_user(tb, user_buffer, copy))
910 return -EFAULT;
911 tb[copy] = 0;
912 pr_debug("%s,%lu buffer -:%s:-\n",
913 name, (unsigned long)count, tb);
914 }
915
916 if (!strcmp(name, "min_pkt_size")) {
917 len = num_arg(&user_buffer[i], 10, &value);
918 if (len < 0)
919 return len;
920
921 i += len;
922 if (value < 14 + 20 + 8)
923 value = 14 + 20 + 8;
924 if (value != pkt_dev->min_pkt_size) {
925 pkt_dev->min_pkt_size = value;
926 pkt_dev->cur_pkt_size = value;
927 }
928 sprintf(pg_result, "OK: min_pkt_size=%u",
929 pkt_dev->min_pkt_size);
930 return count;
931 }
932
933 if (!strcmp(name, "max_pkt_size")) {
934 len = num_arg(&user_buffer[i], 10, &value);
935 if (len < 0)
936 return len;
937
938 i += len;
939 if (value < 14 + 20 + 8)
940 value = 14 + 20 + 8;
941 if (value != pkt_dev->max_pkt_size) {
942 pkt_dev->max_pkt_size = value;
943 pkt_dev->cur_pkt_size = value;
944 }
945 sprintf(pg_result, "OK: max_pkt_size=%u",
946 pkt_dev->max_pkt_size);
947 return count;
948 }
949
950 /* Shortcut for min = max */
951
952 if (!strcmp(name, "pkt_size")) {
953 len = num_arg(&user_buffer[i], 10, &value);
954 if (len < 0)
955 return len;
956
957 i += len;
958 if (value < 14 + 20 + 8)
959 value = 14 + 20 + 8;
960 if (value != pkt_dev->min_pkt_size) {
961 pkt_dev->min_pkt_size = value;
962 pkt_dev->max_pkt_size = value;
963 pkt_dev->cur_pkt_size = value;
964 }
965 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
966 return count;
967 }
968
969 if (!strcmp(name, "debug")) {
970 len = num_arg(&user_buffer[i], 10, &value);
971 if (len < 0)
972 return len;
973
974 i += len;
975 debug = value;
976 sprintf(pg_result, "OK: debug=%u", debug);
977 return count;
978 }
979
980 if (!strcmp(name, "frags")) {
981 len = num_arg(&user_buffer[i], 10, &value);
982 if (len < 0)
983 return len;
984
985 i += len;
986 pkt_dev->nfrags = value;
987 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
988 return count;
989 }
990 if (!strcmp(name, "delay")) {
991 len = num_arg(&user_buffer[i], 10, &value);
992 if (len < 0)
993 return len;
994
995 i += len;
996 if (value == 0x7FFFFFFF)
997 pkt_dev->delay = ULLONG_MAX;
998 else
999 pkt_dev->delay = (u64)value;
1000
1001 sprintf(pg_result, "OK: delay=%llu",
1002 (unsigned long long) pkt_dev->delay);
1003 return count;
1004 }
1005 if (!strcmp(name, "rate")) {
1006 len = num_arg(&user_buffer[i], 10, &value);
1007 if (len < 0)
1008 return len;
1009
1010 i += len;
1011 if (!value)
1012 return len;
1013 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
1014 if (debug)
1015 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1016
1017 sprintf(pg_result, "OK: rate=%lu", value);
1018 return count;
1019 }
1020 if (!strcmp(name, "ratep")) {
1021 len = num_arg(&user_buffer[i], 10, &value);
1022 if (len < 0)
1023 return len;
1024
1025 i += len;
1026 if (!value)
1027 return len;
1028 pkt_dev->delay = NSEC_PER_SEC/value;
1029 if (debug)
1030 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1031
1032 sprintf(pg_result, "OK: rate=%lu", value);
1033 return count;
1034 }
1035 if (!strcmp(name, "udp_src_min")) {
1036 len = num_arg(&user_buffer[i], 10, &value);
1037 if (len < 0)
1038 return len;
1039
1040 i += len;
1041 if (value != pkt_dev->udp_src_min) {
1042 pkt_dev->udp_src_min = value;
1043 pkt_dev->cur_udp_src = value;
1044 }
1045 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1046 return count;
1047 }
1048 if (!strcmp(name, "udp_dst_min")) {
1049 len = num_arg(&user_buffer[i], 10, &value);
1050 if (len < 0)
1051 return len;
1052
1053 i += len;
1054 if (value != pkt_dev->udp_dst_min) {
1055 pkt_dev->udp_dst_min = value;
1056 pkt_dev->cur_udp_dst = value;
1057 }
1058 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1059 return count;
1060 }
1061 if (!strcmp(name, "udp_src_max")) {
1062 len = num_arg(&user_buffer[i], 10, &value);
1063 if (len < 0)
1064 return len;
1065
1066 i += len;
1067 if (value != pkt_dev->udp_src_max) {
1068 pkt_dev->udp_src_max = value;
1069 pkt_dev->cur_udp_src = value;
1070 }
1071 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1072 return count;
1073 }
1074 if (!strcmp(name, "udp_dst_max")) {
1075 len = num_arg(&user_buffer[i], 10, &value);
1076 if (len < 0)
1077 return len;
1078
1079 i += len;
1080 if (value != pkt_dev->udp_dst_max) {
1081 pkt_dev->udp_dst_max = value;
1082 pkt_dev->cur_udp_dst = value;
1083 }
1084 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1085 return count;
1086 }
1087 if (!strcmp(name, "clone_skb")) {
1088 len = num_arg(&user_buffer[i], 10, &value);
1089 if (len < 0)
1090 return len;
1091 if ((value > 0) &&
1092 ((pkt_dev->xmit_mode == M_NETIF_RECEIVE) ||
1093 !(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1094 return -ENOTSUPP;
1095 i += len;
1096 pkt_dev->clone_skb = value;
1097
1098 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1099 return count;
1100 }
1101 if (!strcmp(name, "count")) {
1102 len = num_arg(&user_buffer[i], 10, &value);
1103 if (len < 0)
1104 return len;
1105
1106 i += len;
1107 pkt_dev->count = value;
1108 sprintf(pg_result, "OK: count=%llu",
1109 (unsigned long long)pkt_dev->count);
1110 return count;
1111 }
1112 if (!strcmp(name, "src_mac_count")) {
1113 len = num_arg(&user_buffer[i], 10, &value);
1114 if (len < 0)
1115 return len;
1116
1117 i += len;
1118 if (pkt_dev->src_mac_count != value) {
1119 pkt_dev->src_mac_count = value;
1120 pkt_dev->cur_src_mac_offset = 0;
1121 }
1122 sprintf(pg_result, "OK: src_mac_count=%d",
1123 pkt_dev->src_mac_count);
1124 return count;
1125 }
1126 if (!strcmp(name, "dst_mac_count")) {
1127 len = num_arg(&user_buffer[i], 10, &value);
1128 if (len < 0)
1129 return len;
1130
1131 i += len;
1132 if (pkt_dev->dst_mac_count != value) {
1133 pkt_dev->dst_mac_count = value;
1134 pkt_dev->cur_dst_mac_offset = 0;
1135 }
1136 sprintf(pg_result, "OK: dst_mac_count=%d",
1137 pkt_dev->dst_mac_count);
1138 return count;
1139 }
1140 if (!strcmp(name, "burst")) {
1141 len = num_arg(&user_buffer[i], 10, &value);
1142 if (len < 0)
1143 return len;
1144
1145 i += len;
1146 if ((value > 1) && (pkt_dev->xmit_mode == M_START_XMIT) &&
1147 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1148 return -ENOTSUPP;
1149 pkt_dev->burst = value < 1 ? 1 : value;
1150 sprintf(pg_result, "OK: burst=%d", pkt_dev->burst);
1151 return count;
1152 }
1153 if (!strcmp(name, "node")) {
1154 len = num_arg(&user_buffer[i], 10, &value);
1155 if (len < 0)
1156 return len;
1157
1158 i += len;
1159
1160 if (node_possible(value)) {
1161 pkt_dev->node = value;
1162 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1163 if (pkt_dev->page) {
1164 put_page(pkt_dev->page);
1165 pkt_dev->page = NULL;
1166 }
1167 }
1168 else
1169 sprintf(pg_result, "ERROR: node not possible");
1170 return count;
1171 }
1172 if (!strcmp(name, "xmit_mode")) {
1173 char f[32];
1174
1175 memset(f, 0, 32);
1176 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1177 if (len < 0)
1178 return len;
1179
1180 if (copy_from_user(f, &user_buffer[i], len))
1181 return -EFAULT;
1182 i += len;
1183
1184 if (strcmp(f, "start_xmit") == 0) {
1185 pkt_dev->xmit_mode = M_START_XMIT;
1186 } else if (strcmp(f, "netif_receive") == 0) {
1187 /* clone_skb set earlier, not supported in this mode */
1188 if (pkt_dev->clone_skb > 0)
1189 return -ENOTSUPP;
1190
1191 pkt_dev->xmit_mode = M_NETIF_RECEIVE;
1192
1193 /* make sure new packet is allocated every time
1194 * pktgen_xmit() is called
1195 */
1196 pkt_dev->last_ok = 1;
1197
1198 /* override clone_skb if user passed default value
1199 * at module loading time
1200 */
1201 pkt_dev->clone_skb = 0;
1202 } else {
1203 sprintf(pg_result,
1204 "xmit_mode -:%s:- unknown\nAvailable modes: %s",
1205 f, "start_xmit, netif_receive\n");
1206 return count;
1207 }
1208 sprintf(pg_result, "OK: xmit_mode=%s", f);
1209 return count;
1210 }
1211 if (!strcmp(name, "flag")) {
1212 char f[32];
1213 memset(f, 0, 32);
1214 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1215 if (len < 0)
1216 return len;
1217
1218 if (copy_from_user(f, &user_buffer[i], len))
1219 return -EFAULT;
1220 i += len;
1221 if (strcmp(f, "IPSRC_RND") == 0)
1222 pkt_dev->flags |= F_IPSRC_RND;
1223
1224 else if (strcmp(f, "!IPSRC_RND") == 0)
1225 pkt_dev->flags &= ~F_IPSRC_RND;
1226
1227 else if (strcmp(f, "TXSIZE_RND") == 0)
1228 pkt_dev->flags |= F_TXSIZE_RND;
1229
1230 else if (strcmp(f, "!TXSIZE_RND") == 0)
1231 pkt_dev->flags &= ~F_TXSIZE_RND;
1232
1233 else if (strcmp(f, "IPDST_RND") == 0)
1234 pkt_dev->flags |= F_IPDST_RND;
1235
1236 else if (strcmp(f, "!IPDST_RND") == 0)
1237 pkt_dev->flags &= ~F_IPDST_RND;
1238
1239 else if (strcmp(f, "UDPSRC_RND") == 0)
1240 pkt_dev->flags |= F_UDPSRC_RND;
1241
1242 else if (strcmp(f, "!UDPSRC_RND") == 0)
1243 pkt_dev->flags &= ~F_UDPSRC_RND;
1244
1245 else if (strcmp(f, "UDPDST_RND") == 0)
1246 pkt_dev->flags |= F_UDPDST_RND;
1247
1248 else if (strcmp(f, "!UDPDST_RND") == 0)
1249 pkt_dev->flags &= ~F_UDPDST_RND;
1250
1251 else if (strcmp(f, "MACSRC_RND") == 0)
1252 pkt_dev->flags |= F_MACSRC_RND;
1253
1254 else if (strcmp(f, "!MACSRC_RND") == 0)
1255 pkt_dev->flags &= ~F_MACSRC_RND;
1256
1257 else if (strcmp(f, "MACDST_RND") == 0)
1258 pkt_dev->flags |= F_MACDST_RND;
1259
1260 else if (strcmp(f, "!MACDST_RND") == 0)
1261 pkt_dev->flags &= ~F_MACDST_RND;
1262
1263 else if (strcmp(f, "MPLS_RND") == 0)
1264 pkt_dev->flags |= F_MPLS_RND;
1265
1266 else if (strcmp(f, "!MPLS_RND") == 0)
1267 pkt_dev->flags &= ~F_MPLS_RND;
1268
1269 else if (strcmp(f, "VID_RND") == 0)
1270 pkt_dev->flags |= F_VID_RND;
1271
1272 else if (strcmp(f, "!VID_RND") == 0)
1273 pkt_dev->flags &= ~F_VID_RND;
1274
1275 else if (strcmp(f, "SVID_RND") == 0)
1276 pkt_dev->flags |= F_SVID_RND;
1277
1278 else if (strcmp(f, "!SVID_RND") == 0)
1279 pkt_dev->flags &= ~F_SVID_RND;
1280
1281 else if (strcmp(f, "FLOW_SEQ") == 0)
1282 pkt_dev->flags |= F_FLOW_SEQ;
1283
1284 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1285 pkt_dev->flags |= F_QUEUE_MAP_RND;
1286
1287 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1288 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1289
1290 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1291 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1292
1293 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1294 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1295 #ifdef CONFIG_XFRM
1296 else if (strcmp(f, "IPSEC") == 0)
1297 pkt_dev->flags |= F_IPSEC_ON;
1298 #endif
1299
1300 else if (strcmp(f, "!IPV6") == 0)
1301 pkt_dev->flags &= ~F_IPV6;
1302
1303 else if (strcmp(f, "NODE_ALLOC") == 0)
1304 pkt_dev->flags |= F_NODE;
1305
1306 else if (strcmp(f, "!NODE_ALLOC") == 0)
1307 pkt_dev->flags &= ~F_NODE;
1308
1309 else if (strcmp(f, "UDPCSUM") == 0)
1310 pkt_dev->flags |= F_UDPCSUM;
1311
1312 else if (strcmp(f, "!UDPCSUM") == 0)
1313 pkt_dev->flags &= ~F_UDPCSUM;
1314
1315 else if (strcmp(f, "NO_TIMESTAMP") == 0)
1316 pkt_dev->flags |= F_NO_TIMESTAMP;
1317
1318 else if (strcmp(f, "!NO_TIMESTAMP") == 0)
1319 pkt_dev->flags &= ~F_NO_TIMESTAMP;
1320
1321 else {
1322 sprintf(pg_result,
1323 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1324 f,
1325 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1326 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, "
1327 "MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, "
1328 "QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, "
1329 "NO_TIMESTAMP, "
1330 #ifdef CONFIG_XFRM
1331 "IPSEC, "
1332 #endif
1333 "NODE_ALLOC\n");
1334 return count;
1335 }
1336 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1337 return count;
1338 }
1339 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1340 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1341 if (len < 0)
1342 return len;
1343
1344 if (copy_from_user(buf, &user_buffer[i], len))
1345 return -EFAULT;
1346 buf[len] = 0;
1347 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1348 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1349 strncpy(pkt_dev->dst_min, buf, len);
1350 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1351 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1352 }
1353 if (debug)
1354 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
1355 i += len;
1356 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1357 return count;
1358 }
1359 if (!strcmp(name, "dst_max")) {
1360 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1361 if (len < 0)
1362 return len;
1363
1364
1365 if (copy_from_user(buf, &user_buffer[i], len))
1366 return -EFAULT;
1367
1368 buf[len] = 0;
1369 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1370 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1371 strncpy(pkt_dev->dst_max, buf, len);
1372 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1373 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1374 }
1375 if (debug)
1376 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
1377 i += len;
1378 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1379 return count;
1380 }
1381 if (!strcmp(name, "dst6")) {
1382 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1383 if (len < 0)
1384 return len;
1385
1386 pkt_dev->flags |= F_IPV6;
1387
1388 if (copy_from_user(buf, &user_buffer[i], len))
1389 return -EFAULT;
1390 buf[len] = 0;
1391
1392 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
1393 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1394
1395 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1396
1397 if (debug)
1398 pr_debug("dst6 set to: %s\n", buf);
1399
1400 i += len;
1401 sprintf(pg_result, "OK: dst6=%s", buf);
1402 return count;
1403 }
1404 if (!strcmp(name, "dst6_min")) {
1405 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1406 if (len < 0)
1407 return len;
1408
1409 pkt_dev->flags |= F_IPV6;
1410
1411 if (copy_from_user(buf, &user_buffer[i], len))
1412 return -EFAULT;
1413 buf[len] = 0;
1414
1415 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
1416 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1417
1418 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
1419 if (debug)
1420 pr_debug("dst6_min set to: %s\n", buf);
1421
1422 i += len;
1423 sprintf(pg_result, "OK: dst6_min=%s", buf);
1424 return count;
1425 }
1426 if (!strcmp(name, "dst6_max")) {
1427 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1428 if (len < 0)
1429 return len;
1430
1431 pkt_dev->flags |= F_IPV6;
1432
1433 if (copy_from_user(buf, &user_buffer[i], len))
1434 return -EFAULT;
1435 buf[len] = 0;
1436
1437 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
1438 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1439
1440 if (debug)
1441 pr_debug("dst6_max set to: %s\n", buf);
1442
1443 i += len;
1444 sprintf(pg_result, "OK: dst6_max=%s", buf);
1445 return count;
1446 }
1447 if (!strcmp(name, "src6")) {
1448 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1449 if (len < 0)
1450 return len;
1451
1452 pkt_dev->flags |= F_IPV6;
1453
1454 if (copy_from_user(buf, &user_buffer[i], len))
1455 return -EFAULT;
1456 buf[len] = 0;
1457
1458 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
1459 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1460
1461 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1462
1463 if (debug)
1464 pr_debug("src6 set to: %s\n", buf);
1465
1466 i += len;
1467 sprintf(pg_result, "OK: src6=%s", buf);
1468 return count;
1469 }
1470 if (!strcmp(name, "src_min")) {
1471 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1472 if (len < 0)
1473 return len;
1474
1475 if (copy_from_user(buf, &user_buffer[i], len))
1476 return -EFAULT;
1477 buf[len] = 0;
1478 if (strcmp(buf, pkt_dev->src_min) != 0) {
1479 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1480 strncpy(pkt_dev->src_min, buf, len);
1481 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1482 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1483 }
1484 if (debug)
1485 pr_debug("src_min set to: %s\n", pkt_dev->src_min);
1486 i += len;
1487 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1488 return count;
1489 }
1490 if (!strcmp(name, "src_max")) {
1491 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1492 if (len < 0)
1493 return len;
1494
1495 if (copy_from_user(buf, &user_buffer[i], len))
1496 return -EFAULT;
1497 buf[len] = 0;
1498 if (strcmp(buf, pkt_dev->src_max) != 0) {
1499 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1500 strncpy(pkt_dev->src_max, buf, len);
1501 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1502 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1503 }
1504 if (debug)
1505 pr_debug("src_max set to: %s\n", pkt_dev->src_max);
1506 i += len;
1507 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1508 return count;
1509 }
1510 if (!strcmp(name, "dst_mac")) {
1511 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1512 if (len < 0)
1513 return len;
1514
1515 memset(valstr, 0, sizeof(valstr));
1516 if (copy_from_user(valstr, &user_buffer[i], len))
1517 return -EFAULT;
1518
1519 if (!mac_pton(valstr, pkt_dev->dst_mac))
1520 return -EINVAL;
1521 /* Set up Dest MAC */
1522 ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac);
1523
1524 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1525 return count;
1526 }
1527 if (!strcmp(name, "src_mac")) {
1528 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1529 if (len < 0)
1530 return len;
1531
1532 memset(valstr, 0, sizeof(valstr));
1533 if (copy_from_user(valstr, &user_buffer[i], len))
1534 return -EFAULT;
1535
1536 if (!mac_pton(valstr, pkt_dev->src_mac))
1537 return -EINVAL;
1538 /* Set up Src MAC */
1539 ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac);
1540
1541 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1542 return count;
1543 }
1544
1545 if (!strcmp(name, "clear_counters")) {
1546 pktgen_clear_counters(pkt_dev);
1547 sprintf(pg_result, "OK: Clearing counters.\n");
1548 return count;
1549 }
1550
1551 if (!strcmp(name, "flows")) {
1552 len = num_arg(&user_buffer[i], 10, &value);
1553 if (len < 0)
1554 return len;
1555
1556 i += len;
1557 if (value > MAX_CFLOWS)
1558 value = MAX_CFLOWS;
1559
1560 pkt_dev->cflows = value;
1561 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1562 return count;
1563 }
1564 #ifdef CONFIG_XFRM
1565 if (!strcmp(name, "spi")) {
1566 len = num_arg(&user_buffer[i], 10, &value);
1567 if (len < 0)
1568 return len;
1569
1570 i += len;
1571 pkt_dev->spi = value;
1572 sprintf(pg_result, "OK: spi=%u", pkt_dev->spi);
1573 return count;
1574 }
1575 #endif
1576 if (!strcmp(name, "flowlen")) {
1577 len = num_arg(&user_buffer[i], 10, &value);
1578 if (len < 0)
1579 return len;
1580
1581 i += len;
1582 pkt_dev->lflow = value;
1583 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1584 return count;
1585 }
1586
1587 if (!strcmp(name, "queue_map_min")) {
1588 len = num_arg(&user_buffer[i], 5, &value);
1589 if (len < 0)
1590 return len;
1591
1592 i += len;
1593 pkt_dev->queue_map_min = value;
1594 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1595 return count;
1596 }
1597
1598 if (!strcmp(name, "queue_map_max")) {
1599 len = num_arg(&user_buffer[i], 5, &value);
1600 if (len < 0)
1601 return len;
1602
1603 i += len;
1604 pkt_dev->queue_map_max = value;
1605 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1606 return count;
1607 }
1608
1609 if (!strcmp(name, "mpls")) {
1610 unsigned int n, cnt;
1611
1612 len = get_labels(&user_buffer[i], pkt_dev);
1613 if (len < 0)
1614 return len;
1615 i += len;
1616 cnt = sprintf(pg_result, "OK: mpls=");
1617 for (n = 0; n < pkt_dev->nr_labels; n++)
1618 cnt += sprintf(pg_result + cnt,
1619 "%08x%s", ntohl(pkt_dev->labels[n]),
1620 n == pkt_dev->nr_labels-1 ? "" : ",");
1621
1622 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1623 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1624 pkt_dev->svlan_id = 0xffff;
1625
1626 if (debug)
1627 pr_debug("VLAN/SVLAN auto turned off\n");
1628 }
1629 return count;
1630 }
1631
1632 if (!strcmp(name, "vlan_id")) {
1633 len = num_arg(&user_buffer[i], 4, &value);
1634 if (len < 0)
1635 return len;
1636
1637 i += len;
1638 if (value <= 4095) {
1639 pkt_dev->vlan_id = value; /* turn on VLAN */
1640
1641 if (debug)
1642 pr_debug("VLAN turned on\n");
1643
1644 if (debug && pkt_dev->nr_labels)
1645 pr_debug("MPLS auto turned off\n");
1646
1647 pkt_dev->nr_labels = 0; /* turn off MPLS */
1648 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1649 } else {
1650 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1651 pkt_dev->svlan_id = 0xffff;
1652
1653 if (debug)
1654 pr_debug("VLAN/SVLAN turned off\n");
1655 }
1656 return count;
1657 }
1658
1659 if (!strcmp(name, "vlan_p")) {
1660 len = num_arg(&user_buffer[i], 1, &value);
1661 if (len < 0)
1662 return len;
1663
1664 i += len;
1665 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1666 pkt_dev->vlan_p = value;
1667 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1668 } else {
1669 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1670 }
1671 return count;
1672 }
1673
1674 if (!strcmp(name, "vlan_cfi")) {
1675 len = num_arg(&user_buffer[i], 1, &value);
1676 if (len < 0)
1677 return len;
1678
1679 i += len;
1680 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1681 pkt_dev->vlan_cfi = value;
1682 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1683 } else {
1684 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1685 }
1686 return count;
1687 }
1688
1689 if (!strcmp(name, "svlan_id")) {
1690 len = num_arg(&user_buffer[i], 4, &value);
1691 if (len < 0)
1692 return len;
1693
1694 i += len;
1695 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1696 pkt_dev->svlan_id = value; /* turn on SVLAN */
1697
1698 if (debug)
1699 pr_debug("SVLAN turned on\n");
1700
1701 if (debug && pkt_dev->nr_labels)
1702 pr_debug("MPLS auto turned off\n");
1703
1704 pkt_dev->nr_labels = 0; /* turn off MPLS */
1705 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1706 } else {
1707 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1708 pkt_dev->svlan_id = 0xffff;
1709
1710 if (debug)
1711 pr_debug("VLAN/SVLAN turned off\n");
1712 }
1713 return count;
1714 }
1715
1716 if (!strcmp(name, "svlan_p")) {
1717 len = num_arg(&user_buffer[i], 1, &value);
1718 if (len < 0)
1719 return len;
1720
1721 i += len;
1722 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1723 pkt_dev->svlan_p = value;
1724 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1725 } else {
1726 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1727 }
1728 return count;
1729 }
1730
1731 if (!strcmp(name, "svlan_cfi")) {
1732 len = num_arg(&user_buffer[i], 1, &value);
1733 if (len < 0)
1734 return len;
1735
1736 i += len;
1737 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1738 pkt_dev->svlan_cfi = value;
1739 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1740 } else {
1741 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1742 }
1743 return count;
1744 }
1745
1746 if (!strcmp(name, "tos")) {
1747 __u32 tmp_value = 0;
1748 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1749 if (len < 0)
1750 return len;
1751
1752 i += len;
1753 if (len == 2) {
1754 pkt_dev->tos = tmp_value;
1755 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1756 } else {
1757 sprintf(pg_result, "ERROR: tos must be 00-ff");
1758 }
1759 return count;
1760 }
1761
1762 if (!strcmp(name, "traffic_class")) {
1763 __u32 tmp_value = 0;
1764 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1765 if (len < 0)
1766 return len;
1767
1768 i += len;
1769 if (len == 2) {
1770 pkt_dev->traffic_class = tmp_value;
1771 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1772 } else {
1773 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1774 }
1775 return count;
1776 }
1777
1778 if (!strcmp(name, "skb_priority")) {
1779 len = num_arg(&user_buffer[i], 9, &value);
1780 if (len < 0)
1781 return len;
1782
1783 i += len;
1784 pkt_dev->skb_priority = value;
1785 sprintf(pg_result, "OK: skb_priority=%i",
1786 pkt_dev->skb_priority);
1787 return count;
1788 }
1789
1790 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1791 return -EINVAL;
1792 }
1793
1794 static int pktgen_if_open(struct inode *inode, struct file *file)
1795 {
1796 return single_open(file, pktgen_if_show, PDE_DATA(inode));
1797 }
1798
1799 static const struct file_operations pktgen_if_fops = {
1800 .owner = THIS_MODULE,
1801 .open = pktgen_if_open,
1802 .read = seq_read,
1803 .llseek = seq_lseek,
1804 .write = pktgen_if_write,
1805 .release = single_release,
1806 };
1807
1808 static int pktgen_thread_show(struct seq_file *seq, void *v)
1809 {
1810 struct pktgen_thread *t = seq->private;
1811 const struct pktgen_dev *pkt_dev;
1812
1813 BUG_ON(!t);
1814
1815 seq_puts(seq, "Running: ");
1816
1817 rcu_read_lock();
1818 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1819 if (pkt_dev->running)
1820 seq_printf(seq, "%s ", pkt_dev->odevname);
1821
1822 seq_puts(seq, "\nStopped: ");
1823
1824 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1825 if (!pkt_dev->running)
1826 seq_printf(seq, "%s ", pkt_dev->odevname);
1827
1828 if (t->result[0])
1829 seq_printf(seq, "\nResult: %s\n", t->result);
1830 else
1831 seq_puts(seq, "\nResult: NA\n");
1832
1833 rcu_read_unlock();
1834
1835 return 0;
1836 }
1837
1838 static ssize_t pktgen_thread_write(struct file *file,
1839 const char __user * user_buffer,
1840 size_t count, loff_t * offset)
1841 {
1842 struct seq_file *seq = file->private_data;
1843 struct pktgen_thread *t = seq->private;
1844 int i, max, len, ret;
1845 char name[40];
1846 char *pg_result;
1847
1848 if (count < 1) {
1849 // sprintf(pg_result, "Wrong command format");
1850 return -EINVAL;
1851 }
1852
1853 max = count;
1854 len = count_trail_chars(user_buffer, max);
1855 if (len < 0)
1856 return len;
1857
1858 i = len;
1859
1860 /* Read variable name */
1861
1862 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1863 if (len < 0)
1864 return len;
1865
1866 memset(name, 0, sizeof(name));
1867 if (copy_from_user(name, &user_buffer[i], len))
1868 return -EFAULT;
1869 i += len;
1870
1871 max = count - i;
1872 len = count_trail_chars(&user_buffer[i], max);
1873 if (len < 0)
1874 return len;
1875
1876 i += len;
1877
1878 if (debug)
1879 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
1880
1881 if (!t) {
1882 pr_err("ERROR: No thread\n");
1883 ret = -EINVAL;
1884 goto out;
1885 }
1886
1887 pg_result = &(t->result[0]);
1888
1889 if (!strcmp(name, "add_device")) {
1890 char f[32];
1891 memset(f, 0, 32);
1892 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1893 if (len < 0) {
1894 ret = len;
1895 goto out;
1896 }
1897 if (copy_from_user(f, &user_buffer[i], len))
1898 return -EFAULT;
1899 i += len;
1900 mutex_lock(&pktgen_thread_lock);
1901 ret = pktgen_add_device(t, f);
1902 mutex_unlock(&pktgen_thread_lock);
1903 if (!ret) {
1904 ret = count;
1905 sprintf(pg_result, "OK: add_device=%s", f);
1906 } else
1907 sprintf(pg_result, "ERROR: can not add device %s", f);
1908 goto out;
1909 }
1910
1911 if (!strcmp(name, "rem_device_all")) {
1912 mutex_lock(&pktgen_thread_lock);
1913 t->control |= T_REMDEVALL;
1914 mutex_unlock(&pktgen_thread_lock);
1915 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1916 ret = count;
1917 sprintf(pg_result, "OK: rem_device_all");
1918 goto out;
1919 }
1920
1921 if (!strcmp(name, "max_before_softirq")) {
1922 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1923 ret = count;
1924 goto out;
1925 }
1926
1927 ret = -EINVAL;
1928 out:
1929 return ret;
1930 }
1931
1932 static int pktgen_thread_open(struct inode *inode, struct file *file)
1933 {
1934 return single_open(file, pktgen_thread_show, PDE_DATA(inode));
1935 }
1936
1937 static const struct file_operations pktgen_thread_fops = {
1938 .owner = THIS_MODULE,
1939 .open = pktgen_thread_open,
1940 .read = seq_read,
1941 .llseek = seq_lseek,
1942 .write = pktgen_thread_write,
1943 .release = single_release,
1944 };
1945
1946 /* Think find or remove for NN */
1947 static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn,
1948 const char *ifname, int remove)
1949 {
1950 struct pktgen_thread *t;
1951 struct pktgen_dev *pkt_dev = NULL;
1952 bool exact = (remove == FIND);
1953
1954 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1955 pkt_dev = pktgen_find_dev(t, ifname, exact);
1956 if (pkt_dev) {
1957 if (remove) {
1958 pkt_dev->removal_mark = 1;
1959 t->control |= T_REMDEV;
1960 }
1961 break;
1962 }
1963 }
1964 return pkt_dev;
1965 }
1966
1967 /*
1968 * mark a device for removal
1969 */
1970 static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname)
1971 {
1972 struct pktgen_dev *pkt_dev = NULL;
1973 const int max_tries = 10, msec_per_try = 125;
1974 int i = 0;
1975
1976 mutex_lock(&pktgen_thread_lock);
1977 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1978
1979 while (1) {
1980
1981 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE);
1982 if (pkt_dev == NULL)
1983 break; /* success */
1984
1985 mutex_unlock(&pktgen_thread_lock);
1986 pr_debug("%s: waiting for %s to disappear....\n",
1987 __func__, ifname);
1988 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1989 mutex_lock(&pktgen_thread_lock);
1990
1991 if (++i >= max_tries) {
1992 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1993 __func__, msec_per_try * i, ifname);
1994 break;
1995 }
1996
1997 }
1998
1999 mutex_unlock(&pktgen_thread_lock);
2000 }
2001
2002 static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev)
2003 {
2004 struct pktgen_thread *t;
2005
2006 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
2007 struct pktgen_dev *pkt_dev;
2008
2009 rcu_read_lock();
2010 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
2011 if (pkt_dev->odev != dev)
2012 continue;
2013
2014 proc_remove(pkt_dev->entry);
2015
2016 pkt_dev->entry = proc_create_data(dev->name, 0600,
2017 pn->proc_dir,
2018 &pktgen_if_fops,
2019 pkt_dev);
2020 if (!pkt_dev->entry)
2021 pr_err("can't move proc entry for '%s'\n",
2022 dev->name);
2023 break;
2024 }
2025 rcu_read_unlock();
2026 }
2027 }
2028
2029 static int pktgen_device_event(struct notifier_block *unused,
2030 unsigned long event, void *ptr)
2031 {
2032 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2033 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id);
2034
2035 if (pn->pktgen_exiting)
2036 return NOTIFY_DONE;
2037
2038 /* It is OK that we do not hold the group lock right now,
2039 * as we run under the RTNL lock.
2040 */
2041
2042 switch (event) {
2043 case NETDEV_CHANGENAME:
2044 pktgen_change_name(pn, dev);
2045 break;
2046
2047 case NETDEV_UNREGISTER:
2048 pktgen_mark_device(pn, dev->name);
2049 break;
2050 }
2051
2052 return NOTIFY_DONE;
2053 }
2054
2055 static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn,
2056 struct pktgen_dev *pkt_dev,
2057 const char *ifname)
2058 {
2059 char b[IFNAMSIZ+5];
2060 int i;
2061
2062 for (i = 0; ifname[i] != '@'; i++) {
2063 if (i == IFNAMSIZ)
2064 break;
2065
2066 b[i] = ifname[i];
2067 }
2068 b[i] = 0;
2069
2070 return dev_get_by_name(pn->net, b);
2071 }
2072
2073
2074 /* Associate pktgen_dev with a device. */
2075
2076 static int pktgen_setup_dev(const struct pktgen_net *pn,
2077 struct pktgen_dev *pkt_dev, const char *ifname)
2078 {
2079 struct net_device *odev;
2080 int err;
2081
2082 /* Clean old setups */
2083 if (pkt_dev->odev) {
2084 dev_put(pkt_dev->odev);
2085 pkt_dev->odev = NULL;
2086 }
2087
2088 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname);
2089 if (!odev) {
2090 pr_err("no such netdevice: \"%s\"\n", ifname);
2091 return -ENODEV;
2092 }
2093
2094 if (odev->type != ARPHRD_ETHER) {
2095 pr_err("not an ethernet device: \"%s\"\n", ifname);
2096 err = -EINVAL;
2097 } else if (!netif_running(odev)) {
2098 pr_err("device is down: \"%s\"\n", ifname);
2099 err = -ENETDOWN;
2100 } else {
2101 pkt_dev->odev = odev;
2102 return 0;
2103 }
2104
2105 dev_put(odev);
2106 return err;
2107 }
2108
2109 /* Read pkt_dev from the interface and set up internal pktgen_dev
2110 * structure to have the right information to create/send packets
2111 */
2112 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2113 {
2114 int ntxq;
2115
2116 if (!pkt_dev->odev) {
2117 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2118 sprintf(pkt_dev->result,
2119 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2120 return;
2121 }
2122
2123 /* make sure that we don't pick a non-existing transmit queue */
2124 ntxq = pkt_dev->odev->real_num_tx_queues;
2125
2126 if (ntxq <= pkt_dev->queue_map_min) {
2127 pr_warn("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2128 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2129 pkt_dev->odevname);
2130 pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2131 }
2132 if (pkt_dev->queue_map_max >= ntxq) {
2133 pr_warn("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2134 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2135 pkt_dev->odevname);
2136 pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2137 }
2138
2139 /* Default to the interface's mac if not explicitly set. */
2140
2141 if (is_zero_ether_addr(pkt_dev->src_mac))
2142 ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr);
2143
2144 /* Set up Dest MAC */
2145 ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac);
2146
2147 if (pkt_dev->flags & F_IPV6) {
2148 int i, set = 0, err = 1;
2149 struct inet6_dev *idev;
2150
2151 if (pkt_dev->min_pkt_size == 0) {
2152 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
2153 + sizeof(struct udphdr)
2154 + sizeof(struct pktgen_hdr)
2155 + pkt_dev->pkt_overhead;
2156 }
2157
2158 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2159 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2160 set = 1;
2161 break;
2162 }
2163
2164 if (!set) {
2165
2166 /*
2167 * Use linklevel address if unconfigured.
2168 *
2169 * use ipv6_get_lladdr if/when it's get exported
2170 */
2171
2172 rcu_read_lock();
2173 idev = __in6_dev_get(pkt_dev->odev);
2174 if (idev) {
2175 struct inet6_ifaddr *ifp;
2176
2177 read_lock_bh(&idev->lock);
2178 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2179 if ((ifp->scope & IFA_LINK) &&
2180 !(ifp->flags & IFA_F_TENTATIVE)) {
2181 pkt_dev->cur_in6_saddr = ifp->addr;
2182 err = 0;
2183 break;
2184 }
2185 }
2186 read_unlock_bh(&idev->lock);
2187 }
2188 rcu_read_unlock();
2189 if (err)
2190 pr_err("ERROR: IPv6 link address not available\n");
2191 }
2192 } else {
2193 if (pkt_dev->min_pkt_size == 0) {
2194 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
2195 + sizeof(struct udphdr)
2196 + sizeof(struct pktgen_hdr)
2197 + pkt_dev->pkt_overhead;
2198 }
2199
2200 pkt_dev->saddr_min = 0;
2201 pkt_dev->saddr_max = 0;
2202 if (strlen(pkt_dev->src_min) == 0) {
2203
2204 struct in_device *in_dev;
2205
2206 rcu_read_lock();
2207 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2208 if (in_dev) {
2209 if (in_dev->ifa_list) {
2210 pkt_dev->saddr_min =
2211 in_dev->ifa_list->ifa_address;
2212 pkt_dev->saddr_max = pkt_dev->saddr_min;
2213 }
2214 }
2215 rcu_read_unlock();
2216 } else {
2217 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2218 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2219 }
2220
2221 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2222 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2223 }
2224 /* Initialize current values. */
2225 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2226 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
2227 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
2228
2229 pkt_dev->cur_dst_mac_offset = 0;
2230 pkt_dev->cur_src_mac_offset = 0;
2231 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2232 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2233 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2234 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2235 pkt_dev->nflows = 0;
2236 }
2237
2238
2239 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2240 {
2241 ktime_t start_time, end_time;
2242 s64 remaining;
2243 struct hrtimer_sleeper t;
2244
2245 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2246 hrtimer_set_expires(&t.timer, spin_until);
2247
2248 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2249 if (remaining <= 0) {
2250 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2251 return;
2252 }
2253
2254 start_time = ktime_get();
2255 if (remaining < 100000) {
2256 /* for small delays (<100us), just loop until limit is reached */
2257 do {
2258 end_time = ktime_get();
2259 } while (ktime_compare(end_time, spin_until) < 0);
2260 } else {
2261 /* see do_nanosleep */
2262 hrtimer_init_sleeper(&t, current);
2263 do {
2264 set_current_state(TASK_INTERRUPTIBLE);
2265 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2266
2267 if (likely(t.task))
2268 schedule();
2269
2270 hrtimer_cancel(&t.timer);
2271 } while (t.task && pkt_dev->running && !signal_pending(current));
2272 __set_current_state(TASK_RUNNING);
2273 end_time = ktime_get();
2274 }
2275
2276 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2277 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2278 }
2279
2280 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2281 {
2282 pkt_dev->pkt_overhead = 0;
2283 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2284 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2285 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2286 }
2287
2288 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2289 {
2290 return !!(pkt_dev->flows[flow].flags & F_INIT);
2291 }
2292
2293 static inline int f_pick(struct pktgen_dev *pkt_dev)
2294 {
2295 int flow = pkt_dev->curfl;
2296
2297 if (pkt_dev->flags & F_FLOW_SEQ) {
2298 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2299 /* reset time */
2300 pkt_dev->flows[flow].count = 0;
2301 pkt_dev->flows[flow].flags = 0;
2302 pkt_dev->curfl += 1;
2303 if (pkt_dev->curfl >= pkt_dev->cflows)
2304 pkt_dev->curfl = 0; /*reset */
2305 }
2306 } else {
2307 flow = prandom_u32() % pkt_dev->cflows;
2308 pkt_dev->curfl = flow;
2309
2310 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2311 pkt_dev->flows[flow].count = 0;
2312 pkt_dev->flows[flow].flags = 0;
2313 }
2314 }
2315
2316 return pkt_dev->curfl;
2317 }
2318
2319
2320 #ifdef CONFIG_XFRM
2321 /* If there was already an IPSEC SA, we keep it as is, else
2322 * we go look for it ...
2323 */
2324 #define DUMMY_MARK 0
2325 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2326 {
2327 struct xfrm_state *x = pkt_dev->flows[flow].x;
2328 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
2329 if (!x) {
2330
2331 if (pkt_dev->spi) {
2332 /* We need as quick as possible to find the right SA
2333 * Searching with minimum criteria to archieve this.
2334 */
2335 x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET);
2336 } else {
2337 /* slow path: we dont already have xfrm_state */
2338 x = xfrm_stateonly_find(pn->net, DUMMY_MARK,
2339 (xfrm_address_t *)&pkt_dev->cur_daddr,
2340 (xfrm_address_t *)&pkt_dev->cur_saddr,
2341 AF_INET,
2342 pkt_dev->ipsmode,
2343 pkt_dev->ipsproto, 0);
2344 }
2345 if (x) {
2346 pkt_dev->flows[flow].x = x;
2347 set_pkt_overhead(pkt_dev);
2348 pkt_dev->pkt_overhead += x->props.header_len;
2349 }
2350
2351 }
2352 }
2353 #endif
2354 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2355 {
2356
2357 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2358 pkt_dev->cur_queue_map = smp_processor_id();
2359
2360 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2361 __u16 t;
2362 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2363 t = prandom_u32() %
2364 (pkt_dev->queue_map_max -
2365 pkt_dev->queue_map_min + 1)
2366 + pkt_dev->queue_map_min;
2367 } else {
2368 t = pkt_dev->cur_queue_map + 1;
2369 if (t > pkt_dev->queue_map_max)
2370 t = pkt_dev->queue_map_min;
2371 }
2372 pkt_dev->cur_queue_map = t;
2373 }
2374 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2375 }
2376
2377 /* Increment/randomize headers according to flags and current values
2378 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2379 */
2380 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2381 {
2382 __u32 imn;
2383 __u32 imx;
2384 int flow = 0;
2385
2386 if (pkt_dev->cflows)
2387 flow = f_pick(pkt_dev);
2388
2389 /* Deal with source MAC */
2390 if (pkt_dev->src_mac_count > 1) {
2391 __u32 mc;
2392 __u32 tmp;
2393
2394 if (pkt_dev->flags & F_MACSRC_RND)
2395 mc = prandom_u32() % pkt_dev->src_mac_count;
2396 else {
2397 mc = pkt_dev->cur_src_mac_offset++;
2398 if (pkt_dev->cur_src_mac_offset >=
2399 pkt_dev->src_mac_count)
2400 pkt_dev->cur_src_mac_offset = 0;
2401 }
2402
2403 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2404 pkt_dev->hh[11] = tmp;
2405 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2406 pkt_dev->hh[10] = tmp;
2407 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2408 pkt_dev->hh[9] = tmp;
2409 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2410 pkt_dev->hh[8] = tmp;
2411 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2412 pkt_dev->hh[7] = tmp;
2413 }
2414
2415 /* Deal with Destination MAC */
2416 if (pkt_dev->dst_mac_count > 1) {
2417 __u32 mc;
2418 __u32 tmp;
2419
2420 if (pkt_dev->flags & F_MACDST_RND)
2421 mc = prandom_u32() % pkt_dev->dst_mac_count;
2422
2423 else {
2424 mc = pkt_dev->cur_dst_mac_offset++;
2425 if (pkt_dev->cur_dst_mac_offset >=
2426 pkt_dev->dst_mac_count) {
2427 pkt_dev->cur_dst_mac_offset = 0;
2428 }
2429 }
2430
2431 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2432 pkt_dev->hh[5] = tmp;
2433 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2434 pkt_dev->hh[4] = tmp;
2435 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2436 pkt_dev->hh[3] = tmp;
2437 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2438 pkt_dev->hh[2] = tmp;
2439 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2440 pkt_dev->hh[1] = tmp;
2441 }
2442
2443 if (pkt_dev->flags & F_MPLS_RND) {
2444 unsigned int i;
2445 for (i = 0; i < pkt_dev->nr_labels; i++)
2446 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2447 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2448 ((__force __be32)prandom_u32() &
2449 htonl(0x000fffff));
2450 }
2451
2452 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2453 pkt_dev->vlan_id = prandom_u32() & (4096 - 1);
2454 }
2455
2456 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2457 pkt_dev->svlan_id = prandom_u32() & (4096 - 1);
2458 }
2459
2460 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2461 if (pkt_dev->flags & F_UDPSRC_RND)
2462 pkt_dev->cur_udp_src = prandom_u32() %
2463 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2464 + pkt_dev->udp_src_min;
2465
2466 else {
2467 pkt_dev->cur_udp_src++;
2468 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2469 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2470 }
2471 }
2472
2473 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2474 if (pkt_dev->flags & F_UDPDST_RND) {
2475 pkt_dev->cur_udp_dst = prandom_u32() %
2476 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2477 + pkt_dev->udp_dst_min;
2478 } else {
2479 pkt_dev->cur_udp_dst++;
2480 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2481 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2482 }
2483 }
2484
2485 if (!(pkt_dev->flags & F_IPV6)) {
2486
2487 imn = ntohl(pkt_dev->saddr_min);
2488 imx = ntohl(pkt_dev->saddr_max);
2489 if (imn < imx) {
2490 __u32 t;
2491 if (pkt_dev->flags & F_IPSRC_RND)
2492 t = prandom_u32() % (imx - imn) + imn;
2493 else {
2494 t = ntohl(pkt_dev->cur_saddr);
2495 t++;
2496 if (t > imx)
2497 t = imn;
2498
2499 }
2500 pkt_dev->cur_saddr = htonl(t);
2501 }
2502
2503 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2504 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2505 } else {
2506 imn = ntohl(pkt_dev->daddr_min);
2507 imx = ntohl(pkt_dev->daddr_max);
2508 if (imn < imx) {
2509 __u32 t;
2510 __be32 s;
2511 if (pkt_dev->flags & F_IPDST_RND) {
2512
2513 do {
2514 t = prandom_u32() %
2515 (imx - imn) + imn;
2516 s = htonl(t);
2517 } while (ipv4_is_loopback(s) ||
2518 ipv4_is_multicast(s) ||
2519 ipv4_is_lbcast(s) ||
2520 ipv4_is_zeronet(s) ||
2521 ipv4_is_local_multicast(s));
2522 pkt_dev->cur_daddr = s;
2523 } else {
2524 t = ntohl(pkt_dev->cur_daddr);
2525 t++;
2526 if (t > imx) {
2527 t = imn;
2528 }
2529 pkt_dev->cur_daddr = htonl(t);
2530 }
2531 }
2532 if (pkt_dev->cflows) {
2533 pkt_dev->flows[flow].flags |= F_INIT;
2534 pkt_dev->flows[flow].cur_daddr =
2535 pkt_dev->cur_daddr;
2536 #ifdef CONFIG_XFRM
2537 if (pkt_dev->flags & F_IPSEC_ON)
2538 get_ipsec_sa(pkt_dev, flow);
2539 #endif
2540 pkt_dev->nflows++;
2541 }
2542 }
2543 } else { /* IPV6 * */
2544
2545 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
2546 int i;
2547
2548 /* Only random destinations yet */
2549
2550 for (i = 0; i < 4; i++) {
2551 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2552 (((__force __be32)prandom_u32() |
2553 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2554 pkt_dev->max_in6_daddr.s6_addr32[i]);
2555 }
2556 }
2557 }
2558
2559 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2560 __u32 t;
2561 if (pkt_dev->flags & F_TXSIZE_RND) {
2562 t = prandom_u32() %
2563 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2564 + pkt_dev->min_pkt_size;
2565 } else {
2566 t = pkt_dev->cur_pkt_size + 1;
2567 if (t > pkt_dev->max_pkt_size)
2568 t = pkt_dev->min_pkt_size;
2569 }
2570 pkt_dev->cur_pkt_size = t;
2571 }
2572
2573 set_cur_queue_map(pkt_dev);
2574
2575 pkt_dev->flows[flow].count++;
2576 }
2577
2578
2579 #ifdef CONFIG_XFRM
2580 static u32 pktgen_dst_metrics[RTAX_MAX + 1] = {
2581
2582 [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */
2583 };
2584
2585 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2586 {
2587 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2588 int err = 0;
2589 struct net *net = dev_net(pkt_dev->odev);
2590
2591 if (!x)
2592 return 0;
2593 /* XXX: we dont support tunnel mode for now until
2594 * we resolve the dst issue */
2595 if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0))
2596 return 0;
2597
2598 /* But when user specify an valid SPI, transformation
2599 * supports both transport/tunnel mode + ESP/AH type.
2600 */
2601 if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0))
2602 skb->_skb_refdst = (unsigned long)&pkt_dev->dst | SKB_DST_NOREF;
2603
2604 rcu_read_lock_bh();
2605 err = x->outer_mode->output(x, skb);
2606 rcu_read_unlock_bh();
2607 if (err) {
2608 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR);
2609 goto error;
2610 }
2611 err = x->type->output(x, skb);
2612 if (err) {
2613 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR);
2614 goto error;
2615 }
2616 spin_lock_bh(&x->lock);
2617 x->curlft.bytes += skb->len;
2618 x->curlft.packets++;
2619 spin_unlock_bh(&x->lock);
2620 error:
2621 return err;
2622 }
2623
2624 static void free_SAs(struct pktgen_dev *pkt_dev)
2625 {
2626 if (pkt_dev->cflows) {
2627 /* let go of the SAs if we have them */
2628 int i;
2629 for (i = 0; i < pkt_dev->cflows; i++) {
2630 struct xfrm_state *x = pkt_dev->flows[i].x;
2631 if (x) {
2632 xfrm_state_put(x);
2633 pkt_dev->flows[i].x = NULL;
2634 }
2635 }
2636 }
2637 }
2638
2639 static int process_ipsec(struct pktgen_dev *pkt_dev,
2640 struct sk_buff *skb, __be16 protocol)
2641 {
2642 if (pkt_dev->flags & F_IPSEC_ON) {
2643 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2644 int nhead = 0;
2645 if (x) {
2646 struct ethhdr *eth;
2647 struct iphdr *iph;
2648 int ret;
2649
2650 nhead = x->props.header_len - skb_headroom(skb);
2651 if (nhead > 0) {
2652 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2653 if (ret < 0) {
2654 pr_err("Error expanding ipsec packet %d\n",
2655 ret);
2656 goto err;
2657 }
2658 }
2659
2660 /* ipsec is not expecting ll header */
2661 skb_pull(skb, ETH_HLEN);
2662 ret = pktgen_output_ipsec(skb, pkt_dev);
2663 if (ret) {
2664 pr_err("Error creating ipsec packet %d\n", ret);
2665 goto err;
2666 }
2667 /* restore ll */
2668 eth = (struct ethhdr *)skb_push(skb, ETH_HLEN);
2669 memcpy(eth, pkt_dev->hh, 2 * ETH_ALEN);
2670 eth->h_proto = protocol;
2671
2672 /* Update IPv4 header len as well as checksum value */
2673 iph = ip_hdr(skb);
2674 iph->tot_len = htons(skb->len - ETH_HLEN);
2675 ip_send_check(iph);
2676 }
2677 }
2678 return 1;
2679 err:
2680 kfree_skb(skb);
2681 return 0;
2682 }
2683 #endif
2684
2685 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2686 {
2687 unsigned int i;
2688 for (i = 0; i < pkt_dev->nr_labels; i++)
2689 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2690
2691 mpls--;
2692 *mpls |= MPLS_STACK_BOTTOM;
2693 }
2694
2695 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2696 unsigned int prio)
2697 {
2698 return htons(id | (cfi << 12) | (prio << 13));
2699 }
2700
2701 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2702 int datalen)
2703 {
2704 struct timeval timestamp;
2705 struct pktgen_hdr *pgh;
2706
2707 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
2708 datalen -= sizeof(*pgh);
2709
2710 if (pkt_dev->nfrags <= 0) {
2711 memset(skb_put(skb, datalen), 0, datalen);
2712 } else {
2713 int frags = pkt_dev->nfrags;
2714 int i, len;
2715 int frag_len;
2716
2717
2718 if (frags > MAX_SKB_FRAGS)
2719 frags = MAX_SKB_FRAGS;
2720 len = datalen - frags * PAGE_SIZE;
2721 if (len > 0) {
2722 memset(skb_put(skb, len), 0, len);
2723 datalen = frags * PAGE_SIZE;
2724 }
2725
2726 i = 0;
2727 frag_len = (datalen/frags) < PAGE_SIZE ?
2728 (datalen/frags) : PAGE_SIZE;
2729 while (datalen > 0) {
2730 if (unlikely(!pkt_dev->page)) {
2731 int node = numa_node_id();
2732
2733 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2734 node = pkt_dev->node;
2735 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2736 if (!pkt_dev->page)
2737 break;
2738 }
2739 get_page(pkt_dev->page);
2740 skb_frag_set_page(skb, i, pkt_dev->page);
2741 skb_shinfo(skb)->frags[i].page_offset = 0;
2742 /*last fragment, fill rest of data*/
2743 if (i == (frags - 1))
2744 skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2745 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2746 else
2747 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2748 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2749 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2750 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2751 i++;
2752 skb_shinfo(skb)->nr_frags = i;
2753 }
2754 }
2755
2756 /* Stamp the time, and sequence number,
2757 * convert them to network byte order
2758 */
2759 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2760 pgh->seq_num = htonl(pkt_dev->seq_num);
2761
2762 if (pkt_dev->flags & F_NO_TIMESTAMP) {
2763 pgh->tv_sec = 0;
2764 pgh->tv_usec = 0;
2765 } else {
2766 do_gettimeofday(&timestamp);
2767 pgh->tv_sec = htonl(timestamp.tv_sec);
2768 pgh->tv_usec = htonl(timestamp.tv_usec);
2769 }
2770 }
2771
2772 static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
2773 struct pktgen_dev *pkt_dev,
2774 unsigned int extralen)
2775 {
2776 struct sk_buff *skb = NULL;
2777 unsigned int size = pkt_dev->cur_pkt_size + 64 + extralen +
2778 pkt_dev->pkt_overhead;
2779
2780 if (pkt_dev->flags & F_NODE) {
2781 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id();
2782
2783 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node);
2784 if (likely(skb)) {
2785 skb_reserve(skb, NET_SKB_PAD);
2786 skb->dev = dev;
2787 }
2788 } else {
2789 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
2790 }
2791
2792 return skb;
2793 }
2794
2795 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2796 struct pktgen_dev *pkt_dev)
2797 {
2798 struct sk_buff *skb = NULL;
2799 __u8 *eth;
2800 struct udphdr *udph;
2801 int datalen, iplen;
2802 struct iphdr *iph;
2803 __be16 protocol = htons(ETH_P_IP);
2804 __be32 *mpls;
2805 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2806 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2807 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2808 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2809 u16 queue_map;
2810
2811 if (pkt_dev->nr_labels)
2812 protocol = htons(ETH_P_MPLS_UC);
2813
2814 if (pkt_dev->vlan_id != 0xffff)
2815 protocol = htons(ETH_P_8021Q);
2816
2817 /* Update any of the values, used when we're incrementing various
2818 * fields.
2819 */
2820 mod_cur_headers(pkt_dev);
2821 queue_map = pkt_dev->cur_queue_map;
2822
2823 datalen = (odev->hard_header_len + 16) & ~0xf;
2824
2825 skb = pktgen_alloc_skb(odev, pkt_dev, datalen);
2826 if (!skb) {
2827 sprintf(pkt_dev->result, "No memory");
2828 return NULL;
2829 }
2830
2831 prefetchw(skb->data);
2832 skb_reserve(skb, datalen);
2833
2834 /* Reserve for ethernet and IP header */
2835 eth = (__u8 *) skb_push(skb, 14);
2836 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2837 if (pkt_dev->nr_labels)
2838 mpls_push(mpls, pkt_dev);
2839
2840 if (pkt_dev->vlan_id != 0xffff) {
2841 if (pkt_dev->svlan_id != 0xffff) {
2842 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2843 *svlan_tci = build_tci(pkt_dev->svlan_id,
2844 pkt_dev->svlan_cfi,
2845 pkt_dev->svlan_p);
2846 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2847 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2848 }
2849 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2850 *vlan_tci = build_tci(pkt_dev->vlan_id,
2851 pkt_dev->vlan_cfi,
2852 pkt_dev->vlan_p);
2853 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2854 *vlan_encapsulated_proto = htons(ETH_P_IP);
2855 }
2856
2857 skb_set_mac_header(skb, 0);
2858 skb_set_network_header(skb, skb->len);
2859 iph = (struct iphdr *) skb_put(skb, sizeof(struct iphdr));
2860
2861 skb_set_transport_header(skb, skb->len);
2862 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2863 skb_set_queue_mapping(skb, queue_map);
2864 skb->priority = pkt_dev->skb_priority;
2865
2866 memcpy(eth, pkt_dev->hh, 12);
2867 *(__be16 *) & eth[12] = protocol;
2868
2869 /* Eth + IPh + UDPh + mpls */
2870 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2871 pkt_dev->pkt_overhead;
2872 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
2873 datalen = sizeof(struct pktgen_hdr);
2874
2875 udph->source = htons(pkt_dev->cur_udp_src);
2876 udph->dest = htons(pkt_dev->cur_udp_dst);
2877 udph->len = htons(datalen + 8); /* DATA + udphdr */
2878 udph->check = 0;
2879
2880 iph->ihl = 5;
2881 iph->version = 4;
2882 iph->ttl = 32;
2883 iph->tos = pkt_dev->tos;
2884 iph->protocol = IPPROTO_UDP; /* UDP */
2885 iph->saddr = pkt_dev->cur_saddr;
2886 iph->daddr = pkt_dev->cur_daddr;
2887 iph->id = htons(pkt_dev->ip_id);
2888 pkt_dev->ip_id++;
2889 iph->frag_off = 0;
2890 iplen = 20 + 8 + datalen;
2891 iph->tot_len = htons(iplen);
2892 ip_send_check(iph);
2893 skb->protocol = protocol;
2894 skb->dev = odev;
2895 skb->pkt_type = PACKET_HOST;
2896
2897 pktgen_finalize_skb(pkt_dev, skb, datalen);
2898
2899 if (!(pkt_dev->flags & F_UDPCSUM)) {
2900 skb->ip_summed = CHECKSUM_NONE;
2901 } else if (odev->features & NETIF_F_V4_CSUM) {
2902 skb->ip_summed = CHECKSUM_PARTIAL;
2903 skb->csum = 0;
2904 udp4_hwcsum(skb, iph->saddr, iph->daddr);
2905 } else {
2906 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), datalen + 8, 0);
2907
2908 /* add protocol-dependent pseudo-header */
2909 udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
2910 datalen + 8, IPPROTO_UDP, csum);
2911
2912 if (udph->check == 0)
2913 udph->check = CSUM_MANGLED_0;
2914 }
2915
2916 #ifdef CONFIG_XFRM
2917 if (!process_ipsec(pkt_dev, skb, protocol))
2918 return NULL;
2919 #endif
2920
2921 return skb;
2922 }
2923
2924 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2925 struct pktgen_dev *pkt_dev)
2926 {
2927 struct sk_buff *skb = NULL;
2928 __u8 *eth;
2929 struct udphdr *udph;
2930 int datalen, udplen;
2931 struct ipv6hdr *iph;
2932 __be16 protocol = htons(ETH_P_IPV6);
2933 __be32 *mpls;
2934 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2935 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2936 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2937 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2938 u16 queue_map;
2939
2940 if (pkt_dev->nr_labels)
2941 protocol = htons(ETH_P_MPLS_UC);
2942
2943 if (pkt_dev->vlan_id != 0xffff)
2944 protocol = htons(ETH_P_8021Q);
2945
2946 /* Update any of the values, used when we're incrementing various
2947 * fields.
2948 */
2949 mod_cur_headers(pkt_dev);
2950 queue_map = pkt_dev->cur_queue_map;
2951
2952 skb = pktgen_alloc_skb(odev, pkt_dev, 16);
2953 if (!skb) {
2954 sprintf(pkt_dev->result, "No memory");
2955 return NULL;
2956 }
2957
2958 prefetchw(skb->data);
2959 skb_reserve(skb, 16);
2960
2961 /* Reserve for ethernet and IP header */
2962 eth = (__u8 *) skb_push(skb, 14);
2963 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2964 if (pkt_dev->nr_labels)
2965 mpls_push(mpls, pkt_dev);
2966
2967 if (pkt_dev->vlan_id != 0xffff) {
2968 if (pkt_dev->svlan_id != 0xffff) {
2969 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2970 *svlan_tci = build_tci(pkt_dev->svlan_id,
2971 pkt_dev->svlan_cfi,
2972 pkt_dev->svlan_p);
2973 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2974 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2975 }
2976 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2977 *vlan_tci = build_tci(pkt_dev->vlan_id,
2978 pkt_dev->vlan_cfi,
2979 pkt_dev->vlan_p);
2980 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2981 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2982 }
2983
2984 skb_set_mac_header(skb, 0);
2985 skb_set_network_header(skb, skb->len);
2986 iph = (struct ipv6hdr *) skb_put(skb, sizeof(struct ipv6hdr));
2987
2988 skb_set_transport_header(skb, skb->len);
2989 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2990 skb_set_queue_mapping(skb, queue_map);
2991 skb->priority = pkt_dev->skb_priority;
2992
2993 memcpy(eth, pkt_dev->hh, 12);
2994 *(__be16 *) &eth[12] = protocol;
2995
2996 /* Eth + IPh + UDPh + mpls */
2997 datalen = pkt_dev->cur_pkt_size - 14 -
2998 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2999 pkt_dev->pkt_overhead;
3000
3001 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
3002 datalen = sizeof(struct pktgen_hdr);
3003 net_info_ratelimited("increased datalen to %d\n", datalen);
3004 }
3005
3006 udplen = datalen + sizeof(struct udphdr);
3007 udph->source = htons(pkt_dev->cur_udp_src);
3008 udph->dest = htons(pkt_dev->cur_udp_dst);
3009 udph->len = htons(udplen);
3010 udph->check = 0;
3011
3012 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
3013
3014 if (pkt_dev->traffic_class) {
3015 /* Version + traffic class + flow (0) */
3016 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
3017 }
3018
3019 iph->hop_limit = 32;
3020
3021 iph->payload_len = htons(udplen);
3022 iph->nexthdr = IPPROTO_UDP;
3023
3024 iph->daddr = pkt_dev->cur_in6_daddr;
3025 iph->saddr = pkt_dev->cur_in6_saddr;
3026
3027 skb->protocol = protocol;
3028 skb->dev = odev;
3029 skb->pkt_type = PACKET_HOST;
3030
3031 pktgen_finalize_skb(pkt_dev, skb, datalen);
3032
3033 if (!(pkt_dev->flags & F_UDPCSUM)) {
3034 skb->ip_summed = CHECKSUM_NONE;
3035 } else if (odev->features & NETIF_F_V6_CSUM) {
3036 skb->ip_summed = CHECKSUM_PARTIAL;
3037 skb->csum_start = skb_transport_header(skb) - skb->head;
3038 skb->csum_offset = offsetof(struct udphdr, check);
3039 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0);
3040 } else {
3041 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), udplen, 0);
3042
3043 /* add protocol-dependent pseudo-header */
3044 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum);
3045
3046 if (udph->check == 0)
3047 udph->check = CSUM_MANGLED_0;
3048 }
3049
3050 return skb;
3051 }
3052
3053 static struct sk_buff *fill_packet(struct net_device *odev,
3054 struct pktgen_dev *pkt_dev)
3055 {
3056 if (pkt_dev->flags & F_IPV6)
3057 return fill_packet_ipv6(odev, pkt_dev);
3058 else
3059 return fill_packet_ipv4(odev, pkt_dev);
3060 }
3061
3062 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3063 {
3064 pkt_dev->seq_num = 1;
3065 pkt_dev->idle_acc = 0;
3066 pkt_dev->sofar = 0;
3067 pkt_dev->tx_bytes = 0;
3068 pkt_dev->errors = 0;
3069 }
3070
3071 /* Set up structure for sending pkts, clear counters */
3072
3073 static void pktgen_run(struct pktgen_thread *t)
3074 {
3075 struct pktgen_dev *pkt_dev;
3076 int started = 0;
3077
3078 func_enter();
3079
3080 rcu_read_lock();
3081 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3082
3083 /*
3084 * setup odev and create initial packet.
3085 */
3086 pktgen_setup_inject(pkt_dev);
3087
3088 if (pkt_dev->odev) {
3089 pktgen_clear_counters(pkt_dev);
3090 pkt_dev->skb = NULL;
3091 pkt_dev->started_at = pkt_dev->next_tx = ktime_get();
3092
3093 set_pkt_overhead(pkt_dev);
3094
3095 strcpy(pkt_dev->result, "Starting");
3096 pkt_dev->running = 1; /* Cranke yeself! */
3097 started++;
3098 } else
3099 strcpy(pkt_dev->result, "Error starting");
3100 }
3101 rcu_read_unlock();
3102 if (started)
3103 t->control &= ~(T_STOP);
3104 }
3105
3106 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn)
3107 {
3108 struct pktgen_thread *t;
3109
3110 func_enter();
3111
3112 mutex_lock(&pktgen_thread_lock);
3113
3114 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3115 t->control |= T_STOP;
3116
3117 mutex_unlock(&pktgen_thread_lock);
3118 }
3119
3120 static int thread_is_running(const struct pktgen_thread *t)
3121 {
3122 const struct pktgen_dev *pkt_dev;
3123
3124 rcu_read_lock();
3125 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
3126 if (pkt_dev->running) {
3127 rcu_read_unlock();
3128 return 1;
3129 }
3130 rcu_read_unlock();
3131 return 0;
3132 }
3133
3134 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3135 {
3136 while (thread_is_running(t)) {
3137
3138 msleep_interruptible(100);
3139
3140 if (signal_pending(current))
3141 goto signal;
3142 }
3143 return 1;
3144 signal:
3145 return 0;
3146 }
3147
3148 static int pktgen_wait_all_threads_run(struct pktgen_net *pn)
3149 {
3150 struct pktgen_thread *t;
3151 int sig = 1;
3152
3153 mutex_lock(&pktgen_thread_lock);
3154
3155 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
3156 sig = pktgen_wait_thread_run(t);
3157 if (sig == 0)
3158 break;
3159 }
3160
3161 if (sig == 0)
3162 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3163 t->control |= (T_STOP);
3164
3165 mutex_unlock(&pktgen_thread_lock);
3166 return sig;
3167 }
3168
3169 static void pktgen_run_all_threads(struct pktgen_net *pn)
3170 {
3171 struct pktgen_thread *t;
3172
3173 func_enter();
3174
3175 mutex_lock(&pktgen_thread_lock);
3176
3177 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3178 t->control |= (T_RUN);
3179
3180 mutex_unlock(&pktgen_thread_lock);
3181
3182 /* Propagate thread->control */
3183 schedule_timeout_interruptible(msecs_to_jiffies(125));
3184
3185 pktgen_wait_all_threads_run(pn);
3186 }
3187
3188 static void pktgen_reset_all_threads(struct pktgen_net *pn)
3189 {
3190 struct pktgen_thread *t;
3191
3192 func_enter();
3193
3194 mutex_lock(&pktgen_thread_lock);
3195
3196 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3197 t->control |= (T_REMDEVALL);
3198
3199 mutex_unlock(&pktgen_thread_lock);
3200
3201 /* Propagate thread->control */
3202 schedule_timeout_interruptible(msecs_to_jiffies(125));
3203
3204 pktgen_wait_all_threads_run(pn);
3205 }
3206
3207 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3208 {
3209 __u64 bps, mbps, pps;
3210 char *p = pkt_dev->result;
3211 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3212 pkt_dev->started_at);
3213 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3214
3215 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3216 (unsigned long long)ktime_to_us(elapsed),
3217 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3218 (unsigned long long)ktime_to_us(idle),
3219 (unsigned long long)pkt_dev->sofar,
3220 pkt_dev->cur_pkt_size, nr_frags);
3221
3222 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3223 ktime_to_ns(elapsed));
3224
3225 bps = pps * 8 * pkt_dev->cur_pkt_size;
3226
3227 mbps = bps;
3228 do_div(mbps, 1000000);
3229 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3230 (unsigned long long)pps,
3231 (unsigned long long)mbps,
3232 (unsigned long long)bps,
3233 (unsigned long long)pkt_dev->errors);
3234 }
3235
3236 /* Set stopped-at timer, remove from running list, do counters & statistics */
3237 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3238 {
3239 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3240
3241 if (!pkt_dev->running) {
3242 pr_warn("interface: %s is already stopped\n",
3243 pkt_dev->odevname);
3244 return -EINVAL;
3245 }
3246
3247 pkt_dev->running = 0;
3248 kfree_skb(pkt_dev->skb);
3249 pkt_dev->skb = NULL;
3250 pkt_dev->stopped_at = ktime_get();
3251
3252 show_results(pkt_dev, nr_frags);
3253
3254 return 0;
3255 }
3256
3257 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3258 {
3259 struct pktgen_dev *pkt_dev, *best = NULL;
3260
3261 rcu_read_lock();
3262 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3263 if (!pkt_dev->running)
3264 continue;
3265 if (best == NULL)
3266 best = pkt_dev;
3267 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0)
3268 best = pkt_dev;
3269 }
3270 rcu_read_unlock();
3271
3272 return best;
3273 }
3274
3275 static void pktgen_stop(struct pktgen_thread *t)
3276 {
3277 struct pktgen_dev *pkt_dev;
3278
3279 func_enter();
3280
3281 rcu_read_lock();
3282
3283 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3284 pktgen_stop_device(pkt_dev);
3285 }
3286
3287 rcu_read_unlock();
3288 }
3289
3290 /*
3291 * one of our devices needs to be removed - find it
3292 * and remove it
3293 */
3294 static void pktgen_rem_one_if(struct pktgen_thread *t)
3295 {
3296 struct list_head *q, *n;
3297 struct pktgen_dev *cur;
3298
3299 func_enter();
3300
3301 list_for_each_safe(q, n, &t->if_list) {
3302 cur = list_entry(q, struct pktgen_dev, list);
3303
3304 if (!cur->removal_mark)
3305 continue;
3306
3307 kfree_skb(cur->skb);
3308 cur->skb = NULL;
3309
3310 pktgen_remove_device(t, cur);
3311
3312 break;
3313 }
3314 }
3315
3316 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3317 {
3318 struct list_head *q, *n;
3319 struct pktgen_dev *cur;
3320
3321 func_enter();
3322
3323 /* Remove all devices, free mem */
3324
3325 list_for_each_safe(q, n, &t->if_list) {
3326 cur = list_entry(q, struct pktgen_dev, list);
3327
3328 kfree_skb(cur->skb);
3329 cur->skb = NULL;
3330
3331 pktgen_remove_device(t, cur);
3332 }
3333 }
3334
3335 static void pktgen_rem_thread(struct pktgen_thread *t)
3336 {
3337 /* Remove from the thread list */
3338 remove_proc_entry(t->tsk->comm, t->net->proc_dir);
3339 }
3340
3341 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3342 {
3343 ktime_t idle_start = ktime_get();
3344 schedule();
3345 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3346 }
3347
3348 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3349 {
3350 ktime_t idle_start = ktime_get();
3351
3352 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3353 if (signal_pending(current))
3354 break;
3355
3356 if (need_resched())
3357 pktgen_resched(pkt_dev);
3358 else
3359 cpu_relax();
3360 }
3361 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3362 }
3363
3364 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3365 {
3366 unsigned int burst = ACCESS_ONCE(pkt_dev->burst);
3367 struct net_device *odev = pkt_dev->odev;
3368 struct netdev_queue *txq;
3369 struct sk_buff *skb;
3370 int ret;
3371
3372 /* If device is offline, then don't send */
3373 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3374 pktgen_stop_device(pkt_dev);
3375 return;
3376 }
3377
3378 /* This is max DELAY, this has special meaning of
3379 * "never transmit"
3380 */
3381 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3382 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
3383 return;
3384 }
3385
3386 /* If no skb or clone count exhausted then get new one */
3387 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3388 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3389 /* build a new pkt */
3390 kfree_skb(pkt_dev->skb);
3391
3392 pkt_dev->skb = fill_packet(odev, pkt_dev);
3393 if (pkt_dev->skb == NULL) {
3394 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3395 schedule();
3396 pkt_dev->clone_count--; /* back out increment, OOM */
3397 return;
3398 }
3399 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3400 pkt_dev->allocated_skbs++;
3401 pkt_dev->clone_count = 0; /* reset counter */
3402 }
3403
3404 if (pkt_dev->delay && pkt_dev->last_ok)
3405 spin(pkt_dev, pkt_dev->next_tx);
3406
3407 if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) {
3408 skb = pkt_dev->skb;
3409 skb->protocol = eth_type_trans(skb, skb->dev);
3410 atomic_add(burst, &skb->users);
3411 local_bh_disable();
3412 do {
3413 ret = netif_receive_skb(skb);
3414 if (ret == NET_RX_DROP)
3415 pkt_dev->errors++;
3416 pkt_dev->sofar++;
3417 pkt_dev->seq_num++;
3418 if (atomic_read(&skb->users) != burst) {
3419 /* skb was queued by rps/rfs or taps,
3420 * so cannot reuse this skb
3421 */
3422 atomic_sub(burst - 1, &skb->users);
3423 /* get out of the loop and wait
3424 * until skb is consumed
3425 */
3426 break;
3427 }
3428 /* skb was 'freed' by stack, so clean few
3429 * bits and reuse it
3430 */
3431 #ifdef CONFIG_NET_CLS_ACT
3432 skb->tc_verd = 0; /* reset reclass/redir ttl */
3433 #endif
3434 } while (--burst > 0);
3435 goto out; /* Skips xmit_mode M_START_XMIT */
3436 }
3437
3438 txq = skb_get_tx_queue(odev, pkt_dev->skb);
3439
3440 local_bh_disable();
3441
3442 HARD_TX_LOCK(odev, txq, smp_processor_id());
3443
3444 if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) {
3445 ret = NETDEV_TX_BUSY;
3446 pkt_dev->last_ok = 0;
3447 goto unlock;
3448 }
3449 atomic_add(burst, &pkt_dev->skb->users);
3450
3451 xmit_more:
3452 ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0);
3453
3454 switch (ret) {
3455 case NETDEV_TX_OK:
3456 pkt_dev->last_ok = 1;
3457 pkt_dev->sofar++;
3458 pkt_dev->seq_num++;
3459 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3460 if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq))
3461 goto xmit_more;
3462 break;
3463 case NET_XMIT_DROP:
3464 case NET_XMIT_CN:
3465 case NET_XMIT_POLICED:
3466 /* skb has been consumed */
3467 pkt_dev->errors++;
3468 break;
3469 default: /* Drivers are not supposed to return other values! */
3470 net_info_ratelimited("%s xmit error: %d\n",
3471 pkt_dev->odevname, ret);
3472 pkt_dev->errors++;
3473 /* fallthru */
3474 case NETDEV_TX_LOCKED:
3475 case NETDEV_TX_BUSY:
3476 /* Retry it next time */
3477 atomic_dec(&(pkt_dev->skb->users));
3478 pkt_dev->last_ok = 0;
3479 }
3480 if (unlikely(burst))
3481 atomic_sub(burst, &pkt_dev->skb->users);
3482 unlock:
3483 HARD_TX_UNLOCK(odev, txq);
3484
3485 out:
3486 local_bh_enable();
3487
3488 /* If pkt_dev->count is zero, then run forever */
3489 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3490 pktgen_wait_for_skb(pkt_dev);
3491
3492 /* Done with this */
3493 pktgen_stop_device(pkt_dev);
3494 }
3495 }
3496
3497 /*
3498 * Main loop of the thread goes here
3499 */
3500
3501 static int pktgen_thread_worker(void *arg)
3502 {
3503 DEFINE_WAIT(wait);
3504 struct pktgen_thread *t = arg;
3505 struct pktgen_dev *pkt_dev = NULL;
3506 int cpu = t->cpu;
3507
3508 BUG_ON(smp_processor_id() != cpu);
3509
3510 init_waitqueue_head(&t->queue);
3511 complete(&t->start_done);
3512
3513 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3514
3515 set_freezable();
3516
3517 while (!kthread_should_stop()) {
3518 pkt_dev = next_to_run(t);
3519
3520 if (unlikely(!pkt_dev && t->control == 0)) {
3521 if (t->net->pktgen_exiting)
3522 break;
3523 wait_event_interruptible_timeout(t->queue,
3524 t->control != 0,
3525 HZ/10);
3526 try_to_freeze();
3527 continue;
3528 }
3529
3530 if (likely(pkt_dev)) {
3531 pktgen_xmit(pkt_dev);
3532
3533 if (need_resched())
3534 pktgen_resched(pkt_dev);
3535 else
3536 cpu_relax();
3537 }
3538
3539 if (t->control & T_STOP) {
3540 pktgen_stop(t);
3541 t->control &= ~(T_STOP);
3542 }
3543
3544 if (t->control & T_RUN) {
3545 pktgen_run(t);
3546 t->control &= ~(T_RUN);
3547 }
3548
3549 if (t->control & T_REMDEVALL) {
3550 pktgen_rem_all_ifs(t);
3551 t->control &= ~(T_REMDEVALL);
3552 }
3553
3554 if (t->control & T_REMDEV) {
3555 pktgen_rem_one_if(t);
3556 t->control &= ~(T_REMDEV);
3557 }
3558
3559 try_to_freeze();
3560 }
3561
3562 pr_debug("%s stopping all device\n", t->tsk->comm);
3563 pktgen_stop(t);
3564
3565 pr_debug("%s removing all device\n", t->tsk->comm);
3566 pktgen_rem_all_ifs(t);
3567
3568 pr_debug("%s removing thread\n", t->tsk->comm);
3569 pktgen_rem_thread(t);
3570
3571 return 0;
3572 }
3573
3574 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3575 const char *ifname, bool exact)
3576 {
3577 struct pktgen_dev *p, *pkt_dev = NULL;
3578 size_t len = strlen(ifname);
3579
3580 rcu_read_lock();
3581 list_for_each_entry_rcu(p, &t->if_list, list)
3582 if (strncmp(p->odevname, ifname, len) == 0) {
3583 if (p->odevname[len]) {
3584 if (exact || p->odevname[len] != '@')
3585 continue;
3586 }
3587 pkt_dev = p;
3588 break;
3589 }
3590
3591 rcu_read_unlock();
3592 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3593 return pkt_dev;
3594 }
3595
3596 /*
3597 * Adds a dev at front of if_list.
3598 */
3599
3600 static int add_dev_to_thread(struct pktgen_thread *t,
3601 struct pktgen_dev *pkt_dev)
3602 {
3603 int rv = 0;
3604
3605 /* This function cannot be called concurrently, as its called
3606 * under pktgen_thread_lock mutex, but it can run from
3607 * userspace on another CPU than the kthread. The if_lock()
3608 * is used here to sync with concurrent instances of
3609 * _rem_dev_from_if_list() invoked via kthread, which is also
3610 * updating the if_list */
3611 if_lock(t);
3612
3613 if (pkt_dev->pg_thread) {
3614 pr_err("ERROR: already assigned to a thread\n");
3615 rv = -EBUSY;
3616 goto out;
3617 }
3618
3619 pkt_dev->running = 0;
3620 pkt_dev->pg_thread = t;
3621 list_add_rcu(&pkt_dev->list, &t->if_list);
3622
3623 out:
3624 if_unlock(t);
3625 return rv;
3626 }
3627
3628 /* Called under thread lock */
3629
3630 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3631 {
3632 struct pktgen_dev *pkt_dev;
3633 int err;
3634 int node = cpu_to_node(t->cpu);
3635
3636 /* We don't allow a device to be on several threads */
3637
3638 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND);
3639 if (pkt_dev) {
3640 pr_err("ERROR: interface already used\n");
3641 return -EBUSY;
3642 }
3643
3644 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3645 if (!pkt_dev)
3646 return -ENOMEM;
3647
3648 strcpy(pkt_dev->odevname, ifname);
3649 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3650 node);
3651 if (pkt_dev->flows == NULL) {
3652 kfree(pkt_dev);
3653 return -ENOMEM;
3654 }
3655
3656 pkt_dev->removal_mark = 0;
3657 pkt_dev->nfrags = 0;
3658 pkt_dev->delay = pg_delay_d;
3659 pkt_dev->count = pg_count_d;
3660 pkt_dev->sofar = 0;
3661 pkt_dev->udp_src_min = 9; /* sink port */
3662 pkt_dev->udp_src_max = 9;
3663 pkt_dev->udp_dst_min = 9;
3664 pkt_dev->udp_dst_max = 9;
3665 pkt_dev->vlan_p = 0;
3666 pkt_dev->vlan_cfi = 0;
3667 pkt_dev->vlan_id = 0xffff;
3668 pkt_dev->svlan_p = 0;
3669 pkt_dev->svlan_cfi = 0;
3670 pkt_dev->svlan_id = 0xffff;
3671 pkt_dev->burst = 1;
3672 pkt_dev->node = -1;
3673
3674 err = pktgen_setup_dev(t->net, pkt_dev, ifname);
3675 if (err)
3676 goto out1;
3677 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3678 pkt_dev->clone_skb = pg_clone_skb_d;
3679
3680 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir,
3681 &pktgen_if_fops, pkt_dev);
3682 if (!pkt_dev->entry) {
3683 pr_err("cannot create %s/%s procfs entry\n",
3684 PG_PROC_DIR, ifname);
3685 err = -EINVAL;
3686 goto out2;
3687 }
3688 #ifdef CONFIG_XFRM
3689 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3690 pkt_dev->ipsproto = IPPROTO_ESP;
3691
3692 /* xfrm tunnel mode needs additional dst to extract outter
3693 * ip header protocol/ttl/id field, here creat a phony one.
3694 * instead of looking for a valid rt, which definitely hurting
3695 * performance under such circumstance.
3696 */
3697 pkt_dev->dstops.family = AF_INET;
3698 pkt_dev->dst.dev = pkt_dev->odev;
3699 dst_init_metrics(&pkt_dev->dst, pktgen_dst_metrics, false);
3700 pkt_dev->dst.child = &pkt_dev->dst;
3701 pkt_dev->dst.ops = &pkt_dev->dstops;
3702 #endif
3703
3704 return add_dev_to_thread(t, pkt_dev);
3705 out2:
3706 dev_put(pkt_dev->odev);
3707 out1:
3708 #ifdef CONFIG_XFRM
3709 free_SAs(pkt_dev);
3710 #endif
3711 vfree(pkt_dev->flows);
3712 kfree(pkt_dev);
3713 return err;
3714 }
3715
3716 static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
3717 {
3718 struct pktgen_thread *t;
3719 struct proc_dir_entry *pe;
3720 struct task_struct *p;
3721
3722 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3723 cpu_to_node(cpu));
3724 if (!t) {
3725 pr_err("ERROR: out of memory, can't create new thread\n");
3726 return -ENOMEM;
3727 }
3728
3729 spin_lock_init(&t->if_lock);
3730 t->cpu = cpu;
3731
3732 INIT_LIST_HEAD(&t->if_list);
3733
3734 list_add_tail(&t->th_list, &pn->pktgen_threads);
3735 init_completion(&t->start_done);
3736
3737 p = kthread_create_on_node(pktgen_thread_worker,
3738 t,
3739 cpu_to_node(cpu),
3740 "kpktgend_%d", cpu);
3741 if (IS_ERR(p)) {
3742 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3743 list_del(&t->th_list);
3744 kfree(t);
3745 return PTR_ERR(p);
3746 }
3747 kthread_bind(p, cpu);
3748 t->tsk = p;
3749
3750 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
3751 &pktgen_thread_fops, t);
3752 if (!pe) {
3753 pr_err("cannot create %s/%s procfs entry\n",
3754 PG_PROC_DIR, t->tsk->comm);
3755 kthread_stop(p);
3756 list_del(&t->th_list);
3757 kfree(t);
3758 return -EINVAL;
3759 }
3760
3761 t->net = pn;
3762 get_task_struct(p);
3763 wake_up_process(p);
3764 wait_for_completion(&t->start_done);
3765
3766 return 0;
3767 }
3768
3769 /*
3770 * Removes a device from the thread if_list.
3771 */
3772 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3773 struct pktgen_dev *pkt_dev)
3774 {
3775 struct list_head *q, *n;
3776 struct pktgen_dev *p;
3777
3778 if_lock(t);
3779 list_for_each_safe(q, n, &t->if_list) {
3780 p = list_entry(q, struct pktgen_dev, list);
3781 if (p == pkt_dev)
3782 list_del_rcu(&p->list);
3783 }
3784 if_unlock(t);
3785 }
3786
3787 static int pktgen_remove_device(struct pktgen_thread *t,
3788 struct pktgen_dev *pkt_dev)
3789 {
3790 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3791
3792 if (pkt_dev->running) {
3793 pr_warn("WARNING: trying to remove a running interface, stopping it now\n");
3794 pktgen_stop_device(pkt_dev);
3795 }
3796
3797 /* Dis-associate from the interface */
3798
3799 if (pkt_dev->odev) {
3800 dev_put(pkt_dev->odev);
3801 pkt_dev->odev = NULL;
3802 }
3803
3804 /* Remove proc before if_list entry, because add_device uses
3805 * list to determine if interface already exist, avoid race
3806 * with proc_create_data() */
3807 proc_remove(pkt_dev->entry);
3808
3809 /* And update the thread if_list */
3810 _rem_dev_from_if_list(t, pkt_dev);
3811
3812 #ifdef CONFIG_XFRM
3813 free_SAs(pkt_dev);
3814 #endif
3815 vfree(pkt_dev->flows);
3816 if (pkt_dev->page)
3817 put_page(pkt_dev->page);
3818 kfree_rcu(pkt_dev, rcu);
3819 return 0;
3820 }
3821
3822 static int __net_init pg_net_init(struct net *net)
3823 {
3824 struct pktgen_net *pn = net_generic(net, pg_net_id);
3825 struct proc_dir_entry *pe;
3826 int cpu, ret = 0;
3827
3828 pn->net = net;
3829 INIT_LIST_HEAD(&pn->pktgen_threads);
3830 pn->pktgen_exiting = false;
3831 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net);
3832 if (!pn->proc_dir) {
3833 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR);
3834 return -ENODEV;
3835 }
3836 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops);
3837 if (pe == NULL) {
3838 pr_err("cannot create %s procfs entry\n", PGCTRL);
3839 ret = -EINVAL;
3840 goto remove;
3841 }
3842
3843 for_each_online_cpu(cpu) {
3844 int err;
3845
3846 err = pktgen_create_thread(cpu, pn);
3847 if (err)
3848 pr_warn("Cannot create thread for cpu %d (%d)\n",
3849 cpu, err);
3850 }
3851
3852 if (list_empty(&pn->pktgen_threads)) {
3853 pr_err("Initialization failed for all threads\n");
3854 ret = -ENODEV;
3855 goto remove_entry;
3856 }
3857
3858 return 0;
3859
3860 remove_entry:
3861 remove_proc_entry(PGCTRL, pn->proc_dir);
3862 remove:
3863 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3864 return ret;
3865 }
3866
3867 static void __net_exit pg_net_exit(struct net *net)
3868 {
3869 struct pktgen_net *pn = net_generic(net, pg_net_id);
3870 struct pktgen_thread *t;
3871 struct list_head *q, *n;
3872 LIST_HEAD(list);
3873
3874 /* Stop all interfaces & threads */
3875 pn->pktgen_exiting = true;
3876
3877 mutex_lock(&pktgen_thread_lock);
3878 list_splice_init(&pn->pktgen_threads, &list);
3879 mutex_unlock(&pktgen_thread_lock);
3880
3881 list_for_each_safe(q, n, &list) {
3882 t = list_entry(q, struct pktgen_thread, th_list);
3883 list_del(&t->th_list);
3884 kthread_stop(t->tsk);
3885 put_task_struct(t->tsk);
3886 kfree(t);
3887 }
3888
3889 remove_proc_entry(PGCTRL, pn->proc_dir);
3890 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3891 }
3892
3893 static struct pernet_operations pg_net_ops = {
3894 .init = pg_net_init,
3895 .exit = pg_net_exit,
3896 .id = &pg_net_id,
3897 .size = sizeof(struct pktgen_net),
3898 };
3899
3900 static int __init pg_init(void)
3901 {
3902 int ret = 0;
3903
3904 pr_info("%s", version);
3905 ret = register_pernet_subsys(&pg_net_ops);
3906 if (ret)
3907 return ret;
3908 ret = register_netdevice_notifier(&pktgen_notifier_block);
3909 if (ret)
3910 unregister_pernet_subsys(&pg_net_ops);
3911
3912 return ret;
3913 }
3914
3915 static void __exit pg_cleanup(void)
3916 {
3917 unregister_netdevice_notifier(&pktgen_notifier_block);
3918 unregister_pernet_subsys(&pg_net_ops);
3919 /* Don't need rcu_barrier() due to use of kfree_rcu() */
3920 }
3921
3922 module_init(pg_init);
3923 module_exit(pg_cleanup);
3924
3925 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3926 MODULE_DESCRIPTION("Packet Generator tool");
3927 MODULE_LICENSE("GPL");
3928 MODULE_VERSION(VERSION);
3929 module_param(pg_count_d, int, 0);
3930 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3931 module_param(pg_delay_d, int, 0);
3932 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3933 module_param(pg_clone_skb_d, int, 0);
3934 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3935 module_param(debug, int, 0);
3936 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
Linux kernel - Deliverables
This page took 0.171441 seconds and 5 git commands to generate.