projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
pktgen: Add UDPCSUM flag to support UDP checksums
[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. The if_lock should be possible to remove when add/rem_device is merged
73 * into this too.
74 *
75 * By design there should only be *one* "controlling" process. In practice
76 * multiple write accesses gives unpredictable result. Understood by "write"
77 * to /proc gives result code thats should be read be the "writer".
78 * For practical use this should be no problem.
79 *
80 * Note when adding devices to a specific CPU there good idea to also assign
81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
82 * --ro
83 *
84 * Fix refcount off by one if first packet fails, potential null deref,
85 * memleak 030710- KJP
86 *
87 * First "ranges" functionality for ipv6 030726 --ro
88 *
89 * Included flow support. 030802 ANK.
90 *
91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
92 *
93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
95 *
96 * New xmit() return, do_div and misc clean up by Stephen Hemminger
97 * <shemminger@osdl.org> 040923
98 *
99 * Randy Dunlap fixed u64 printk compiler waring
100 *
101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
103 *
104 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
106 *
107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
108 * 050103
109 *
110 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
111 *
112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
113 *
114 * Fixed src_mac command to set source mac of packet to value specified in
115 * command by Adit Ranadive <adit.262@gmail.com>
116 *
117 */
118
119 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
120
121 #include <linux/sys.h>
122 #include <linux/types.h>
123 #include <linux/module.h>
124 #include <linux/moduleparam.h>
125 #include <linux/kernel.h>
126 #include <linux/mutex.h>
127 #include <linux/sched.h>
128 #include <linux/slab.h>
129 #include <linux/vmalloc.h>
130 #include <linux/unistd.h>
131 #include <linux/string.h>
132 #include <linux/ptrace.h>
133 #include <linux/errno.h>
134 #include <linux/ioport.h>
135 #include <linux/interrupt.h>
136 #include <linux/capability.h>
137 #include <linux/hrtimer.h>
138 #include <linux/freezer.h>
139 #include <linux/delay.h>
140 #include <linux/timer.h>
141 #include <linux/list.h>
142 #include <linux/init.h>
143 #include <linux/skbuff.h>
144 #include <linux/netdevice.h>
145 #include <linux/inet.h>
146 #include <linux/inetdevice.h>
147 #include <linux/rtnetlink.h>
148 #include <linux/if_arp.h>
149 #include <linux/if_vlan.h>
150 #include <linux/in.h>
151 #include <linux/ip.h>
152 #include <linux/ipv6.h>
153 #include <linux/udp.h>
154 #include <linux/proc_fs.h>
155 #include <linux/seq_file.h>
156 #include <linux/wait.h>
157 #include <linux/etherdevice.h>
158 #include <linux/kthread.h>
159 #include <linux/prefetch.h>
160 #include <net/net_namespace.h>
161 #include <net/checksum.h>
162 #include <net/ipv6.h>
163 #include <net/udp.h>
164 #include <net/addrconf.h>
165 #ifdef CONFIG_XFRM
166 #include <net/xfrm.h>
167 #endif
168 #include <net/netns/generic.h>
169 #include <asm/byteorder.h>
170 #include <linux/rcupdate.h>
171 #include <linux/bitops.h>
172 #include <linux/io.h>
173 #include <linux/timex.h>
174 #include <linux/uaccess.h>
175 #include <asm/dma.h>
176 #include <asm/div64.h> /* do_div */
177
178 #define VERSION "2.74"
179 #define IP_NAME_SZ 32
180 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
181 #define MPLS_STACK_BOTTOM htonl(0x00000100)
182
183 #define func_enter() pr_debug("entering %s\n", __func__);
184
185 /* Device flag bits */
186 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
187 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
188 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
189 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
190 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
191 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
192 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
193 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
194 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
195 #define F_VID_RND (1<<9) /* Random VLAN ID */
196 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
197 #define F_FLOW_SEQ (1<<11) /* Sequential flows */
198 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */
199 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
200 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
201 #define F_NODE (1<<15) /* Node memory alloc*/
202 #define F_UDPCSUM (1<<16) /* Include UDP checksum */
203
204 /* Thread control flag bits */
205 #define T_STOP (1<<0) /* Stop run */
206 #define T_RUN (1<<1) /* Start run */
207 #define T_REMDEVALL (1<<2) /* Remove all devs */
208 #define T_REMDEV (1<<3) /* Remove one dev */
209
210 /* If lock -- can be removed after some work */
211 #define if_lock(t) spin_lock(&(t->if_lock));
212 #define if_unlock(t) spin_unlock(&(t->if_lock));
213
214 /* Used to help with determining the pkts on receive */
215 #define PKTGEN_MAGIC 0xbe9be955
216 #define PG_PROC_DIR "pktgen"
217 #define PGCTRL "pgctrl"
218
219 #define MAX_CFLOWS 65536
220
221 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
222 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
223
224 struct flow_state {
225 __be32 cur_daddr;
226 int count;
227 #ifdef CONFIG_XFRM
228 struct xfrm_state *x;
229 #endif
230 __u32 flags;
231 };
232
233 /* flow flag bits */
234 #define F_INIT (1<<0) /* flow has been initialized */
235
236 struct pktgen_dev {
237 /*
238 * Try to keep frequent/infrequent used vars. separated.
239 */
240 struct proc_dir_entry *entry; /* proc file */
241 struct pktgen_thread *pg_thread;/* the owner */
242 struct list_head list; /* chaining in the thread's run-queue */
243
244 int running; /* if false, the test will stop */
245
246 /* If min != max, then we will either do a linear iteration, or
247 * we will do a random selection from within the range.
248 */
249 __u32 flags;
250 int removal_mark; /* non-zero => the device is marked for
251 * removal by worker thread */
252
253 int min_pkt_size;
254 int max_pkt_size;
255 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
256 int nfrags;
257 struct page *page;
258 u64 delay; /* nano-seconds */
259
260 __u64 count; /* Default No packets to send */
261 __u64 sofar; /* How many pkts we've sent so far */
262 __u64 tx_bytes; /* How many bytes we've transmitted */
263 __u64 errors; /* Errors when trying to transmit, */
264
265 /* runtime counters relating to clone_skb */
266
267 __u64 allocated_skbs;
268 __u32 clone_count;
269 int last_ok; /* Was last skb sent?
270 * Or a failed transmit of some sort?
271 * This will keep sequence numbers in order
272 */
273 ktime_t next_tx;
274 ktime_t started_at;
275 ktime_t stopped_at;
276 u64 idle_acc; /* nano-seconds */
277
278 __u32 seq_num;
279
280 int clone_skb; /*
281 * Use multiple SKBs during packet gen.
282 * If this number is greater than 1, then
283 * that many copies of the same packet will be
284 * sent before a new packet is allocated.
285 * If you want to send 1024 identical packets
286 * before creating a new packet,
287 * set clone_skb to 1024.
288 */
289
290 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
291 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
292 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
293 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
294
295 struct in6_addr in6_saddr;
296 struct in6_addr in6_daddr;
297 struct in6_addr cur_in6_daddr;
298 struct in6_addr cur_in6_saddr;
299 /* For ranges */
300 struct in6_addr min_in6_daddr;
301 struct in6_addr max_in6_daddr;
302 struct in6_addr min_in6_saddr;
303 struct in6_addr max_in6_saddr;
304
305 /* If we're doing ranges, random or incremental, then this
306 * defines the min/max for those ranges.
307 */
308 __be32 saddr_min; /* inclusive, source IP address */
309 __be32 saddr_max; /* exclusive, source IP address */
310 __be32 daddr_min; /* inclusive, dest IP address */
311 __be32 daddr_max; /* exclusive, dest IP address */
312
313 __u16 udp_src_min; /* inclusive, source UDP port */
314 __u16 udp_src_max; /* exclusive, source UDP port */
315 __u16 udp_dst_min; /* inclusive, dest UDP port */
316 __u16 udp_dst_max; /* exclusive, dest UDP port */
317
318 /* DSCP + ECN */
319 __u8 tos; /* six MSB of (former) IPv4 TOS
320 are for dscp codepoint */
321 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
322 (see RFC 3260, sec. 4) */
323
324 /* MPLS */
325 unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */
326 __be32 labels[MAX_MPLS_LABELS];
327
328 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
329 __u8 vlan_p;
330 __u8 vlan_cfi;
331 __u16 vlan_id; /* 0xffff means no vlan tag */
332
333 __u8 svlan_p;
334 __u8 svlan_cfi;
335 __u16 svlan_id; /* 0xffff means no svlan tag */
336
337 __u32 src_mac_count; /* How many MACs to iterate through */
338 __u32 dst_mac_count; /* How many MACs to iterate through */
339
340 unsigned char dst_mac[ETH_ALEN];
341 unsigned char src_mac[ETH_ALEN];
342
343 __u32 cur_dst_mac_offset;
344 __u32 cur_src_mac_offset;
345 __be32 cur_saddr;
346 __be32 cur_daddr;
347 __u16 ip_id;
348 __u16 cur_udp_dst;
349 __u16 cur_udp_src;
350 __u16 cur_queue_map;
351 __u32 cur_pkt_size;
352 __u32 last_pkt_size;
353
354 __u8 hh[14];
355 /* = {
356 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
357
358 We fill in SRC address later
359 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
360 0x08, 0x00
361 };
362 */
363 __u16 pad; /* pad out the hh struct to an even 16 bytes */
364
365 struct sk_buff *skb; /* skb we are to transmit next, used for when we
366 * are transmitting the same one multiple times
367 */
368 struct net_device *odev; /* The out-going device.
369 * Note that the device should have it's
370 * pg_info pointer pointing back to this
371 * device.
372 * Set when the user specifies the out-going
373 * device name (not when the inject is
374 * started as it used to do.)
375 */
376 char odevname[32];
377 struct flow_state *flows;
378 unsigned int cflows; /* Concurrent flows (config) */
379 unsigned int lflow; /* Flow length (config) */
380 unsigned int nflows; /* accumulated flows (stats) */
381 unsigned int curfl; /* current sequenced flow (state)*/
382
383 u16 queue_map_min;
384 u16 queue_map_max;
385 __u32 skb_priority; /* skb priority field */
386 int node; /* Memory node */
387
388 #ifdef CONFIG_XFRM
389 __u8 ipsmode; /* IPSEC mode (config) */
390 __u8 ipsproto; /* IPSEC type (config) */
391 #endif
392 char result[512];
393 };
394
395 struct pktgen_hdr {
396 __be32 pgh_magic;
397 __be32 seq_num;
398 __be32 tv_sec;
399 __be32 tv_usec;
400 };
401
402
403 static int pg_net_id __read_mostly;
404
405 struct pktgen_net {
406 struct net *net;
407 struct proc_dir_entry *proc_dir;
408 struct list_head pktgen_threads;
409 bool pktgen_exiting;
410 };
411
412 struct pktgen_thread {
413 spinlock_t if_lock; /* for list of devices */
414 struct list_head if_list; /* All device here */
415 struct list_head th_list;
416 struct task_struct *tsk;
417 char result[512];
418
419 /* Field for thread to receive "posted" events terminate,
420 stop ifs etc. */
421
422 u32 control;
423 int cpu;
424
425 wait_queue_head_t queue;
426 struct completion start_done;
427 struct pktgen_net *net;
428 };
429
430 #define REMOVE 1
431 #define FIND 0
432
433 static const char version[] =
434 "Packet Generator for packet performance testing. "
435 "Version: " VERSION "\n";
436
437 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
438 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
439 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
440 const char *ifname, bool exact);
441 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
442 static void pktgen_run_all_threads(struct pktgen_net *pn);
443 static void pktgen_reset_all_threads(struct pktgen_net *pn);
444 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn);
445
446 static void pktgen_stop(struct pktgen_thread *t);
447 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
448
449 /* Module parameters, defaults. */
450 static int pg_count_d __read_mostly = 1000;
451 static int pg_delay_d __read_mostly;
452 static int pg_clone_skb_d __read_mostly;
453 static int debug __read_mostly;
454
455 static DEFINE_MUTEX(pktgen_thread_lock);
456
457 static struct notifier_block pktgen_notifier_block = {
458 .notifier_call = pktgen_device_event,
459 };
460
461 /*
462 * /proc handling functions
463 *
464 */
465
466 static int pgctrl_show(struct seq_file *seq, void *v)
467 {
468 seq_puts(seq, version);
469 return 0;
470 }
471
472 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
473 size_t count, loff_t *ppos)
474 {
475 int err = 0;
476 char data[128];
477 struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
478
479 if (!capable(CAP_NET_ADMIN)) {
480 err = -EPERM;
481 goto out;
482 }
483
484 if (count > sizeof(data))
485 count = sizeof(data);
486
487 if (copy_from_user(data, buf, count)) {
488 err = -EFAULT;
489 goto out;
490 }
491 data[count - 1] = 0; /* Make string */
492
493 if (!strcmp(data, "stop"))
494 pktgen_stop_all_threads_ifs(pn);
495
496 else if (!strcmp(data, "start"))
497 pktgen_run_all_threads(pn);
498
499 else if (!strcmp(data, "reset"))
500 pktgen_reset_all_threads(pn);
501
502 else
503 pr_warning("Unknown command: %s\n", data);
504
505 err = count;
506
507 out:
508 return err;
509 }
510
511 static int pgctrl_open(struct inode *inode, struct file *file)
512 {
513 return single_open(file, pgctrl_show, PDE_DATA(inode));
514 }
515
516 static const struct file_operations pktgen_fops = {
517 .owner = THIS_MODULE,
518 .open = pgctrl_open,
519 .read = seq_read,
520 .llseek = seq_lseek,
521 .write = pgctrl_write,
522 .release = single_release,
523 };
524
525 static int pktgen_if_show(struct seq_file *seq, void *v)
526 {
527 const struct pktgen_dev *pkt_dev = seq->private;
528 ktime_t stopped;
529 u64 idle;
530
531 seq_printf(seq,
532 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
533 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
534 pkt_dev->max_pkt_size);
535
536 seq_printf(seq,
537 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
538 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
539 pkt_dev->clone_skb, pkt_dev->odevname);
540
541 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
542 pkt_dev->lflow);
543
544 seq_printf(seq,
545 " queue_map_min: %u queue_map_max: %u\n",
546 pkt_dev->queue_map_min,
547 pkt_dev->queue_map_max);
548
549 if (pkt_dev->skb_priority)
550 seq_printf(seq, " skb_priority: %u\n",
551 pkt_dev->skb_priority);
552
553 if (pkt_dev->flags & F_IPV6) {
554 seq_printf(seq,
555 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
556 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
557 &pkt_dev->in6_saddr,
558 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
559 &pkt_dev->in6_daddr,
560 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
561 } else {
562 seq_printf(seq,
563 " dst_min: %s dst_max: %s\n",
564 pkt_dev->dst_min, pkt_dev->dst_max);
565 seq_printf(seq,
566 " src_min: %s src_max: %s\n",
567 pkt_dev->src_min, pkt_dev->src_max);
568 }
569
570 seq_puts(seq, " src_mac: ");
571
572 seq_printf(seq, "%pM ",
573 is_zero_ether_addr(pkt_dev->src_mac) ?
574 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
575
576 seq_printf(seq, "dst_mac: ");
577 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
578
579 seq_printf(seq,
580 " udp_src_min: %d udp_src_max: %d"
581 " udp_dst_min: %d udp_dst_max: %d\n",
582 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
583 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
584
585 seq_printf(seq,
586 " src_mac_count: %d dst_mac_count: %d\n",
587 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
588
589 if (pkt_dev->nr_labels) {
590 unsigned int i;
591 seq_printf(seq, " mpls: ");
592 for (i = 0; i < pkt_dev->nr_labels; i++)
593 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
594 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
595 }
596
597 if (pkt_dev->vlan_id != 0xffff)
598 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
599 pkt_dev->vlan_id, pkt_dev->vlan_p,
600 pkt_dev->vlan_cfi);
601
602 if (pkt_dev->svlan_id != 0xffff)
603 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
604 pkt_dev->svlan_id, pkt_dev->svlan_p,
605 pkt_dev->svlan_cfi);
606
607 if (pkt_dev->tos)
608 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
609
610 if (pkt_dev->traffic_class)
611 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
612
613 if (pkt_dev->node >= 0)
614 seq_printf(seq, " node: %d\n", pkt_dev->node);
615
616 seq_printf(seq, " Flags: ");
617
618 if (pkt_dev->flags & F_IPV6)
619 seq_printf(seq, "IPV6 ");
620
621 if (pkt_dev->flags & F_IPSRC_RND)
622 seq_printf(seq, "IPSRC_RND ");
623
624 if (pkt_dev->flags & F_IPDST_RND)
625 seq_printf(seq, "IPDST_RND ");
626
627 if (pkt_dev->flags & F_TXSIZE_RND)
628 seq_printf(seq, "TXSIZE_RND ");
629
630 if (pkt_dev->flags & F_UDPSRC_RND)
631 seq_printf(seq, "UDPSRC_RND ");
632
633 if (pkt_dev->flags & F_UDPDST_RND)
634 seq_printf(seq, "UDPDST_RND ");
635
636 if (pkt_dev->flags & F_UDPCSUM)
637 seq_printf(seq, "UDPCSUM ");
638
639 if (pkt_dev->flags & F_MPLS_RND)
640 seq_printf(seq, "MPLS_RND ");
641
642 if (pkt_dev->flags & F_QUEUE_MAP_RND)
643 seq_printf(seq, "QUEUE_MAP_RND ");
644
645 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
646 seq_printf(seq, "QUEUE_MAP_CPU ");
647
648 if (pkt_dev->cflows) {
649 if (pkt_dev->flags & F_FLOW_SEQ)
650 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
651 else
652 seq_printf(seq, "FLOW_RND ");
653 }
654
655 #ifdef CONFIG_XFRM
656 if (pkt_dev->flags & F_IPSEC_ON)
657 seq_printf(seq, "IPSEC ");
658 #endif
659
660 if (pkt_dev->flags & F_MACSRC_RND)
661 seq_printf(seq, "MACSRC_RND ");
662
663 if (pkt_dev->flags & F_MACDST_RND)
664 seq_printf(seq, "MACDST_RND ");
665
666 if (pkt_dev->flags & F_VID_RND)
667 seq_printf(seq, "VID_RND ");
668
669 if (pkt_dev->flags & F_SVID_RND)
670 seq_printf(seq, "SVID_RND ");
671
672 if (pkt_dev->flags & F_NODE)
673 seq_printf(seq, "NODE_ALLOC ");
674
675 seq_puts(seq, "\n");
676
677 /* not really stopped, more like last-running-at */
678 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at;
679 idle = pkt_dev->idle_acc;
680 do_div(idle, NSEC_PER_USEC);
681
682 seq_printf(seq,
683 "Current:\n pkts-sofar: %llu errors: %llu\n",
684 (unsigned long long)pkt_dev->sofar,
685 (unsigned long long)pkt_dev->errors);
686
687 seq_printf(seq,
688 " started: %lluus stopped: %lluus idle: %lluus\n",
689 (unsigned long long) ktime_to_us(pkt_dev->started_at),
690 (unsigned long long) ktime_to_us(stopped),
691 (unsigned long long) idle);
692
693 seq_printf(seq,
694 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
695 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
696 pkt_dev->cur_src_mac_offset);
697
698 if (pkt_dev->flags & F_IPV6) {
699 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
700 &pkt_dev->cur_in6_saddr,
701 &pkt_dev->cur_in6_daddr);
702 } else
703 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n",
704 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
705
706 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
707 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
708
709 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
710
711 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
712
713 if (pkt_dev->result[0])
714 seq_printf(seq, "Result: %s\n", pkt_dev->result);
715 else
716 seq_printf(seq, "Result: Idle\n");
717
718 return 0;
719 }
720
721
722 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
723 __u32 *num)
724 {
725 int i = 0;
726 *num = 0;
727
728 for (; i < maxlen; i++) {
729 int value;
730 char c;
731 *num <<= 4;
732 if (get_user(c, &user_buffer[i]))
733 return -EFAULT;
734 value = hex_to_bin(c);
735 if (value >= 0)
736 *num |= value;
737 else
738 break;
739 }
740 return i;
741 }
742
743 static int count_trail_chars(const char __user * user_buffer,
744 unsigned int maxlen)
745 {
746 int i;
747
748 for (i = 0; i < maxlen; i++) {
749 char c;
750 if (get_user(c, &user_buffer[i]))
751 return -EFAULT;
752 switch (c) {
753 case '\"':
754 case '\n':
755 case '\r':
756 case '\t':
757 case ' ':
758 case '=':
759 break;
760 default:
761 goto done;
762 }
763 }
764 done:
765 return i;
766 }
767
768 static long num_arg(const char __user *user_buffer, unsigned long maxlen,
769 unsigned long *num)
770 {
771 int i;
772 *num = 0;
773
774 for (i = 0; i < maxlen; i++) {
775 char c;
776 if (get_user(c, &user_buffer[i]))
777 return -EFAULT;
778 if ((c >= '0') && (c <= '9')) {
779 *num *= 10;
780 *num += c - '0';
781 } else
782 break;
783 }
784 return i;
785 }
786
787 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
788 {
789 int i;
790
791 for (i = 0; i < maxlen; i++) {
792 char c;
793 if (get_user(c, &user_buffer[i]))
794 return -EFAULT;
795 switch (c) {
796 case '\"':
797 case '\n':
798 case '\r':
799 case '\t':
800 case ' ':
801 goto done_str;
802 break;
803 default:
804 break;
805 }
806 }
807 done_str:
808 return i;
809 }
810
811 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
812 {
813 unsigned int n = 0;
814 char c;
815 ssize_t i = 0;
816 int len;
817
818 pkt_dev->nr_labels = 0;
819 do {
820 __u32 tmp;
821 len = hex32_arg(&buffer[i], 8, &tmp);
822 if (len <= 0)
823 return len;
824 pkt_dev->labels[n] = htonl(tmp);
825 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
826 pkt_dev->flags |= F_MPLS_RND;
827 i += len;
828 if (get_user(c, &buffer[i]))
829 return -EFAULT;
830 i++;
831 n++;
832 if (n >= MAX_MPLS_LABELS)
833 return -E2BIG;
834 } while (c == ',');
835
836 pkt_dev->nr_labels = n;
837 return i;
838 }
839
840 static ssize_t pktgen_if_write(struct file *file,
841 const char __user * user_buffer, size_t count,
842 loff_t * offset)
843 {
844 struct seq_file *seq = file->private_data;
845 struct pktgen_dev *pkt_dev = seq->private;
846 int i, max, len;
847 char name[16], valstr[32];
848 unsigned long value = 0;
849 char *pg_result = NULL;
850 int tmp = 0;
851 char buf[128];
852
853 pg_result = &(pkt_dev->result[0]);
854
855 if (count < 1) {
856 pr_warning("wrong command format\n");
857 return -EINVAL;
858 }
859
860 max = count;
861 tmp = count_trail_chars(user_buffer, max);
862 if (tmp < 0) {
863 pr_warning("illegal format\n");
864 return tmp;
865 }
866 i = tmp;
867
868 /* Read variable name */
869
870 len = strn_len(&user_buffer[i], sizeof(name) - 1);
871 if (len < 0)
872 return len;
873
874 memset(name, 0, sizeof(name));
875 if (copy_from_user(name, &user_buffer[i], len))
876 return -EFAULT;
877 i += len;
878
879 max = count - i;
880 len = count_trail_chars(&user_buffer[i], max);
881 if (len < 0)
882 return len;
883
884 i += len;
885
886 if (debug) {
887 size_t copy = min_t(size_t, count, 1023);
888 char tb[copy + 1];
889 if (copy_from_user(tb, user_buffer, copy))
890 return -EFAULT;
891 tb[copy] = 0;
892 pr_debug("%s,%lu buffer -:%s:-\n",
893 name, (unsigned long)count, tb);
894 }
895
896 if (!strcmp(name, "min_pkt_size")) {
897 len = num_arg(&user_buffer[i], 10, &value);
898 if (len < 0)
899 return len;
900
901 i += len;
902 if (value < 14 + 20 + 8)
903 value = 14 + 20 + 8;
904 if (value != pkt_dev->min_pkt_size) {
905 pkt_dev->min_pkt_size = value;
906 pkt_dev->cur_pkt_size = value;
907 }
908 sprintf(pg_result, "OK: min_pkt_size=%u",
909 pkt_dev->min_pkt_size);
910 return count;
911 }
912
913 if (!strcmp(name, "max_pkt_size")) {
914 len = num_arg(&user_buffer[i], 10, &value);
915 if (len < 0)
916 return len;
917
918 i += len;
919 if (value < 14 + 20 + 8)
920 value = 14 + 20 + 8;
921 if (value != pkt_dev->max_pkt_size) {
922 pkt_dev->max_pkt_size = value;
923 pkt_dev->cur_pkt_size = value;
924 }
925 sprintf(pg_result, "OK: max_pkt_size=%u",
926 pkt_dev->max_pkt_size);
927 return count;
928 }
929
930 /* Shortcut for min = max */
931
932 if (!strcmp(name, "pkt_size")) {
933 len = num_arg(&user_buffer[i], 10, &value);
934 if (len < 0)
935 return len;
936
937 i += len;
938 if (value < 14 + 20 + 8)
939 value = 14 + 20 + 8;
940 if (value != pkt_dev->min_pkt_size) {
941 pkt_dev->min_pkt_size = value;
942 pkt_dev->max_pkt_size = value;
943 pkt_dev->cur_pkt_size = value;
944 }
945 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
946 return count;
947 }
948
949 if (!strcmp(name, "debug")) {
950 len = num_arg(&user_buffer[i], 10, &value);
951 if (len < 0)
952 return len;
953
954 i += len;
955 debug = value;
956 sprintf(pg_result, "OK: debug=%u", debug);
957 return count;
958 }
959
960 if (!strcmp(name, "frags")) {
961 len = num_arg(&user_buffer[i], 10, &value);
962 if (len < 0)
963 return len;
964
965 i += len;
966 pkt_dev->nfrags = value;
967 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
968 return count;
969 }
970 if (!strcmp(name, "delay")) {
971 len = num_arg(&user_buffer[i], 10, &value);
972 if (len < 0)
973 return len;
974
975 i += len;
976 if (value == 0x7FFFFFFF)
977 pkt_dev->delay = ULLONG_MAX;
978 else
979 pkt_dev->delay = (u64)value;
980
981 sprintf(pg_result, "OK: delay=%llu",
982 (unsigned long long) pkt_dev->delay);
983 return count;
984 }
985 if (!strcmp(name, "rate")) {
986 len = num_arg(&user_buffer[i], 10, &value);
987 if (len < 0)
988 return len;
989
990 i += len;
991 if (!value)
992 return len;
993 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
994 if (debug)
995 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
996
997 sprintf(pg_result, "OK: rate=%lu", value);
998 return count;
999 }
1000 if (!strcmp(name, "ratep")) {
1001 len = num_arg(&user_buffer[i], 10, &value);
1002 if (len < 0)
1003 return len;
1004
1005 i += len;
1006 if (!value)
1007 return len;
1008 pkt_dev->delay = NSEC_PER_SEC/value;
1009 if (debug)
1010 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1011
1012 sprintf(pg_result, "OK: rate=%lu", value);
1013 return count;
1014 }
1015 if (!strcmp(name, "udp_src_min")) {
1016 len = num_arg(&user_buffer[i], 10, &value);
1017 if (len < 0)
1018 return len;
1019
1020 i += len;
1021 if (value != pkt_dev->udp_src_min) {
1022 pkt_dev->udp_src_min = value;
1023 pkt_dev->cur_udp_src = value;
1024 }
1025 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1026 return count;
1027 }
1028 if (!strcmp(name, "udp_dst_min")) {
1029 len = num_arg(&user_buffer[i], 10, &value);
1030 if (len < 0)
1031 return len;
1032
1033 i += len;
1034 if (value != pkt_dev->udp_dst_min) {
1035 pkt_dev->udp_dst_min = value;
1036 pkt_dev->cur_udp_dst = value;
1037 }
1038 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1039 return count;
1040 }
1041 if (!strcmp(name, "udp_src_max")) {
1042 len = num_arg(&user_buffer[i], 10, &value);
1043 if (len < 0)
1044 return len;
1045
1046 i += len;
1047 if (value != pkt_dev->udp_src_max) {
1048 pkt_dev->udp_src_max = value;
1049 pkt_dev->cur_udp_src = value;
1050 }
1051 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1052 return count;
1053 }
1054 if (!strcmp(name, "udp_dst_max")) {
1055 len = num_arg(&user_buffer[i], 10, &value);
1056 if (len < 0)
1057 return len;
1058
1059 i += len;
1060 if (value != pkt_dev->udp_dst_max) {
1061 pkt_dev->udp_dst_max = value;
1062 pkt_dev->cur_udp_dst = value;
1063 }
1064 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1065 return count;
1066 }
1067 if (!strcmp(name, "clone_skb")) {
1068 len = num_arg(&user_buffer[i], 10, &value);
1069 if (len < 0)
1070 return len;
1071 if ((value > 0) &&
1072 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1073 return -ENOTSUPP;
1074 i += len;
1075 pkt_dev->clone_skb = value;
1076
1077 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1078 return count;
1079 }
1080 if (!strcmp(name, "count")) {
1081 len = num_arg(&user_buffer[i], 10, &value);
1082 if (len < 0)
1083 return len;
1084
1085 i += len;
1086 pkt_dev->count = value;
1087 sprintf(pg_result, "OK: count=%llu",
1088 (unsigned long long)pkt_dev->count);
1089 return count;
1090 }
1091 if (!strcmp(name, "src_mac_count")) {
1092 len = num_arg(&user_buffer[i], 10, &value);
1093 if (len < 0)
1094 return len;
1095
1096 i += len;
1097 if (pkt_dev->src_mac_count != value) {
1098 pkt_dev->src_mac_count = value;
1099 pkt_dev->cur_src_mac_offset = 0;
1100 }
1101 sprintf(pg_result, "OK: src_mac_count=%d",
1102 pkt_dev->src_mac_count);
1103 return count;
1104 }
1105 if (!strcmp(name, "dst_mac_count")) {
1106 len = num_arg(&user_buffer[i], 10, &value);
1107 if (len < 0)
1108 return len;
1109
1110 i += len;
1111 if (pkt_dev->dst_mac_count != value) {
1112 pkt_dev->dst_mac_count = value;
1113 pkt_dev->cur_dst_mac_offset = 0;
1114 }
1115 sprintf(pg_result, "OK: dst_mac_count=%d",
1116 pkt_dev->dst_mac_count);
1117 return count;
1118 }
1119 if (!strcmp(name, "node")) {
1120 len = num_arg(&user_buffer[i], 10, &value);
1121 if (len < 0)
1122 return len;
1123
1124 i += len;
1125
1126 if (node_possible(value)) {
1127 pkt_dev->node = value;
1128 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1129 if (pkt_dev->page) {
1130 put_page(pkt_dev->page);
1131 pkt_dev->page = NULL;
1132 }
1133 }
1134 else
1135 sprintf(pg_result, "ERROR: node not possible");
1136 return count;
1137 }
1138 if (!strcmp(name, "flag")) {
1139 char f[32];
1140 memset(f, 0, 32);
1141 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1142 if (len < 0)
1143 return len;
1144
1145 if (copy_from_user(f, &user_buffer[i], len))
1146 return -EFAULT;
1147 i += len;
1148 if (strcmp(f, "IPSRC_RND") == 0)
1149 pkt_dev->flags |= F_IPSRC_RND;
1150
1151 else if (strcmp(f, "!IPSRC_RND") == 0)
1152 pkt_dev->flags &= ~F_IPSRC_RND;
1153
1154 else if (strcmp(f, "TXSIZE_RND") == 0)
1155 pkt_dev->flags |= F_TXSIZE_RND;
1156
1157 else if (strcmp(f, "!TXSIZE_RND") == 0)
1158 pkt_dev->flags &= ~F_TXSIZE_RND;
1159
1160 else if (strcmp(f, "IPDST_RND") == 0)
1161 pkt_dev->flags |= F_IPDST_RND;
1162
1163 else if (strcmp(f, "!IPDST_RND") == 0)
1164 pkt_dev->flags &= ~F_IPDST_RND;
1165
1166 else if (strcmp(f, "UDPSRC_RND") == 0)
1167 pkt_dev->flags |= F_UDPSRC_RND;
1168
1169 else if (strcmp(f, "!UDPSRC_RND") == 0)
1170 pkt_dev->flags &= ~F_UDPSRC_RND;
1171
1172 else if (strcmp(f, "UDPDST_RND") == 0)
1173 pkt_dev->flags |= F_UDPDST_RND;
1174
1175 else if (strcmp(f, "!UDPDST_RND") == 0)
1176 pkt_dev->flags &= ~F_UDPDST_RND;
1177
1178 else if (strcmp(f, "MACSRC_RND") == 0)
1179 pkt_dev->flags |= F_MACSRC_RND;
1180
1181 else if (strcmp(f, "!MACSRC_RND") == 0)
1182 pkt_dev->flags &= ~F_MACSRC_RND;
1183
1184 else if (strcmp(f, "MACDST_RND") == 0)
1185 pkt_dev->flags |= F_MACDST_RND;
1186
1187 else if (strcmp(f, "!MACDST_RND") == 0)
1188 pkt_dev->flags &= ~F_MACDST_RND;
1189
1190 else if (strcmp(f, "MPLS_RND") == 0)
1191 pkt_dev->flags |= F_MPLS_RND;
1192
1193 else if (strcmp(f, "!MPLS_RND") == 0)
1194 pkt_dev->flags &= ~F_MPLS_RND;
1195
1196 else if (strcmp(f, "VID_RND") == 0)
1197 pkt_dev->flags |= F_VID_RND;
1198
1199 else if (strcmp(f, "!VID_RND") == 0)
1200 pkt_dev->flags &= ~F_VID_RND;
1201
1202 else if (strcmp(f, "SVID_RND") == 0)
1203 pkt_dev->flags |= F_SVID_RND;
1204
1205 else if (strcmp(f, "!SVID_RND") == 0)
1206 pkt_dev->flags &= ~F_SVID_RND;
1207
1208 else if (strcmp(f, "FLOW_SEQ") == 0)
1209 pkt_dev->flags |= F_FLOW_SEQ;
1210
1211 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1212 pkt_dev->flags |= F_QUEUE_MAP_RND;
1213
1214 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1215 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1216
1217 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1218 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1219
1220 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1221 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1222 #ifdef CONFIG_XFRM
1223 else if (strcmp(f, "IPSEC") == 0)
1224 pkt_dev->flags |= F_IPSEC_ON;
1225 #endif
1226
1227 else if (strcmp(f, "!IPV6") == 0)
1228 pkt_dev->flags &= ~F_IPV6;
1229
1230 else if (strcmp(f, "NODE_ALLOC") == 0)
1231 pkt_dev->flags |= F_NODE;
1232
1233 else if (strcmp(f, "!NODE_ALLOC") == 0)
1234 pkt_dev->flags &= ~F_NODE;
1235
1236 else if (strcmp(f, "UDPCSUM") == 0)
1237 pkt_dev->flags |= F_UDPCSUM;
1238
1239 else if (strcmp(f, "!UDPCSUM") == 0)
1240 pkt_dev->flags &= ~F_UDPCSUM;
1241
1242 else {
1243 sprintf(pg_result,
1244 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1245 f,
1246 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1247 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n");
1248 return count;
1249 }
1250 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1251 return count;
1252 }
1253 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1254 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1255 if (len < 0)
1256 return len;
1257
1258 if (copy_from_user(buf, &user_buffer[i], len))
1259 return -EFAULT;
1260 buf[len] = 0;
1261 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1262 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1263 strncpy(pkt_dev->dst_min, buf, len);
1264 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1265 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1266 }
1267 if (debug)
1268 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
1269 i += len;
1270 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1271 return count;
1272 }
1273 if (!strcmp(name, "dst_max")) {
1274 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1275 if (len < 0)
1276 return len;
1277
1278
1279 if (copy_from_user(buf, &user_buffer[i], len))
1280 return -EFAULT;
1281
1282 buf[len] = 0;
1283 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1284 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1285 strncpy(pkt_dev->dst_max, buf, len);
1286 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1287 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1288 }
1289 if (debug)
1290 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
1291 i += len;
1292 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1293 return count;
1294 }
1295 if (!strcmp(name, "dst6")) {
1296 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1297 if (len < 0)
1298 return len;
1299
1300 pkt_dev->flags |= F_IPV6;
1301
1302 if (copy_from_user(buf, &user_buffer[i], len))
1303 return -EFAULT;
1304 buf[len] = 0;
1305
1306 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
1307 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1308
1309 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1310
1311 if (debug)
1312 pr_debug("dst6 set to: %s\n", buf);
1313
1314 i += len;
1315 sprintf(pg_result, "OK: dst6=%s", buf);
1316 return count;
1317 }
1318 if (!strcmp(name, "dst6_min")) {
1319 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1320 if (len < 0)
1321 return len;
1322
1323 pkt_dev->flags |= F_IPV6;
1324
1325 if (copy_from_user(buf, &user_buffer[i], len))
1326 return -EFAULT;
1327 buf[len] = 0;
1328
1329 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
1330 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1331
1332 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
1333 if (debug)
1334 pr_debug("dst6_min set to: %s\n", buf);
1335
1336 i += len;
1337 sprintf(pg_result, "OK: dst6_min=%s", buf);
1338 return count;
1339 }
1340 if (!strcmp(name, "dst6_max")) {
1341 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1342 if (len < 0)
1343 return len;
1344
1345 pkt_dev->flags |= F_IPV6;
1346
1347 if (copy_from_user(buf, &user_buffer[i], len))
1348 return -EFAULT;
1349 buf[len] = 0;
1350
1351 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
1352 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1353
1354 if (debug)
1355 pr_debug("dst6_max set to: %s\n", buf);
1356
1357 i += len;
1358 sprintf(pg_result, "OK: dst6_max=%s", buf);
1359 return count;
1360 }
1361 if (!strcmp(name, "src6")) {
1362 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1363 if (len < 0)
1364 return len;
1365
1366 pkt_dev->flags |= F_IPV6;
1367
1368 if (copy_from_user(buf, &user_buffer[i], len))
1369 return -EFAULT;
1370 buf[len] = 0;
1371
1372 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
1373 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1374
1375 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1376
1377 if (debug)
1378 pr_debug("src6 set to: %s\n", buf);
1379
1380 i += len;
1381 sprintf(pg_result, "OK: src6=%s", buf);
1382 return count;
1383 }
1384 if (!strcmp(name, "src_min")) {
1385 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1386 if (len < 0)
1387 return len;
1388
1389 if (copy_from_user(buf, &user_buffer[i], len))
1390 return -EFAULT;
1391 buf[len] = 0;
1392 if (strcmp(buf, pkt_dev->src_min) != 0) {
1393 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1394 strncpy(pkt_dev->src_min, buf, len);
1395 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1396 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1397 }
1398 if (debug)
1399 pr_debug("src_min set to: %s\n", pkt_dev->src_min);
1400 i += len;
1401 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1402 return count;
1403 }
1404 if (!strcmp(name, "src_max")) {
1405 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1406 if (len < 0)
1407 return len;
1408
1409 if (copy_from_user(buf, &user_buffer[i], len))
1410 return -EFAULT;
1411 buf[len] = 0;
1412 if (strcmp(buf, pkt_dev->src_max) != 0) {
1413 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1414 strncpy(pkt_dev->src_max, buf, len);
1415 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1416 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1417 }
1418 if (debug)
1419 pr_debug("src_max set to: %s\n", pkt_dev->src_max);
1420 i += len;
1421 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1422 return count;
1423 }
1424 if (!strcmp(name, "dst_mac")) {
1425 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1426 if (len < 0)
1427 return len;
1428
1429 memset(valstr, 0, sizeof(valstr));
1430 if (copy_from_user(valstr, &user_buffer[i], len))
1431 return -EFAULT;
1432
1433 if (!mac_pton(valstr, pkt_dev->dst_mac))
1434 return -EINVAL;
1435 /* Set up Dest MAC */
1436 memcpy(&pkt_dev->hh[0], pkt_dev->dst_mac, ETH_ALEN);
1437
1438 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1439 return count;
1440 }
1441 if (!strcmp(name, "src_mac")) {
1442 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1443 if (len < 0)
1444 return len;
1445
1446 memset(valstr, 0, sizeof(valstr));
1447 if (copy_from_user(valstr, &user_buffer[i], len))
1448 return -EFAULT;
1449
1450 if (!mac_pton(valstr, pkt_dev->src_mac))
1451 return -EINVAL;
1452 /* Set up Src MAC */
1453 memcpy(&pkt_dev->hh[6], pkt_dev->src_mac, ETH_ALEN);
1454
1455 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1456 return count;
1457 }
1458
1459 if (!strcmp(name, "clear_counters")) {
1460 pktgen_clear_counters(pkt_dev);
1461 sprintf(pg_result, "OK: Clearing counters.\n");
1462 return count;
1463 }
1464
1465 if (!strcmp(name, "flows")) {
1466 len = num_arg(&user_buffer[i], 10, &value);
1467 if (len < 0)
1468 return len;
1469
1470 i += len;
1471 if (value > MAX_CFLOWS)
1472 value = MAX_CFLOWS;
1473
1474 pkt_dev->cflows = value;
1475 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1476 return count;
1477 }
1478
1479 if (!strcmp(name, "flowlen")) {
1480 len = num_arg(&user_buffer[i], 10, &value);
1481 if (len < 0)
1482 return len;
1483
1484 i += len;
1485 pkt_dev->lflow = value;
1486 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1487 return count;
1488 }
1489
1490 if (!strcmp(name, "queue_map_min")) {
1491 len = num_arg(&user_buffer[i], 5, &value);
1492 if (len < 0)
1493 return len;
1494
1495 i += len;
1496 pkt_dev->queue_map_min = value;
1497 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1498 return count;
1499 }
1500
1501 if (!strcmp(name, "queue_map_max")) {
1502 len = num_arg(&user_buffer[i], 5, &value);
1503 if (len < 0)
1504 return len;
1505
1506 i += len;
1507 pkt_dev->queue_map_max = value;
1508 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1509 return count;
1510 }
1511
1512 if (!strcmp(name, "mpls")) {
1513 unsigned int n, cnt;
1514
1515 len = get_labels(&user_buffer[i], pkt_dev);
1516 if (len < 0)
1517 return len;
1518 i += len;
1519 cnt = sprintf(pg_result, "OK: mpls=");
1520 for (n = 0; n < pkt_dev->nr_labels; n++)
1521 cnt += sprintf(pg_result + cnt,
1522 "%08x%s", ntohl(pkt_dev->labels[n]),
1523 n == pkt_dev->nr_labels-1 ? "" : ",");
1524
1525 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1526 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1527 pkt_dev->svlan_id = 0xffff;
1528
1529 if (debug)
1530 pr_debug("VLAN/SVLAN auto turned off\n");
1531 }
1532 return count;
1533 }
1534
1535 if (!strcmp(name, "vlan_id")) {
1536 len = num_arg(&user_buffer[i], 4, &value);
1537 if (len < 0)
1538 return len;
1539
1540 i += len;
1541 if (value <= 4095) {
1542 pkt_dev->vlan_id = value; /* turn on VLAN */
1543
1544 if (debug)
1545 pr_debug("VLAN turned on\n");
1546
1547 if (debug && pkt_dev->nr_labels)
1548 pr_debug("MPLS auto turned off\n");
1549
1550 pkt_dev->nr_labels = 0; /* turn off MPLS */
1551 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1552 } else {
1553 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1554 pkt_dev->svlan_id = 0xffff;
1555
1556 if (debug)
1557 pr_debug("VLAN/SVLAN turned off\n");
1558 }
1559 return count;
1560 }
1561
1562 if (!strcmp(name, "vlan_p")) {
1563 len = num_arg(&user_buffer[i], 1, &value);
1564 if (len < 0)
1565 return len;
1566
1567 i += len;
1568 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1569 pkt_dev->vlan_p = value;
1570 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1571 } else {
1572 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1573 }
1574 return count;
1575 }
1576
1577 if (!strcmp(name, "vlan_cfi")) {
1578 len = num_arg(&user_buffer[i], 1, &value);
1579 if (len < 0)
1580 return len;
1581
1582 i += len;
1583 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1584 pkt_dev->vlan_cfi = value;
1585 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1586 } else {
1587 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1588 }
1589 return count;
1590 }
1591
1592 if (!strcmp(name, "svlan_id")) {
1593 len = num_arg(&user_buffer[i], 4, &value);
1594 if (len < 0)
1595 return len;
1596
1597 i += len;
1598 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1599 pkt_dev->svlan_id = value; /* turn on SVLAN */
1600
1601 if (debug)
1602 pr_debug("SVLAN turned on\n");
1603
1604 if (debug && pkt_dev->nr_labels)
1605 pr_debug("MPLS auto turned off\n");
1606
1607 pkt_dev->nr_labels = 0; /* turn off MPLS */
1608 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1609 } else {
1610 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1611 pkt_dev->svlan_id = 0xffff;
1612
1613 if (debug)
1614 pr_debug("VLAN/SVLAN turned off\n");
1615 }
1616 return count;
1617 }
1618
1619 if (!strcmp(name, "svlan_p")) {
1620 len = num_arg(&user_buffer[i], 1, &value);
1621 if (len < 0)
1622 return len;
1623
1624 i += len;
1625 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1626 pkt_dev->svlan_p = value;
1627 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1628 } else {
1629 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1630 }
1631 return count;
1632 }
1633
1634 if (!strcmp(name, "svlan_cfi")) {
1635 len = num_arg(&user_buffer[i], 1, &value);
1636 if (len < 0)
1637 return len;
1638
1639 i += len;
1640 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1641 pkt_dev->svlan_cfi = value;
1642 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1643 } else {
1644 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1645 }
1646 return count;
1647 }
1648
1649 if (!strcmp(name, "tos")) {
1650 __u32 tmp_value = 0;
1651 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1652 if (len < 0)
1653 return len;
1654
1655 i += len;
1656 if (len == 2) {
1657 pkt_dev->tos = tmp_value;
1658 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1659 } else {
1660 sprintf(pg_result, "ERROR: tos must be 00-ff");
1661 }
1662 return count;
1663 }
1664
1665 if (!strcmp(name, "traffic_class")) {
1666 __u32 tmp_value = 0;
1667 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1668 if (len < 0)
1669 return len;
1670
1671 i += len;
1672 if (len == 2) {
1673 pkt_dev->traffic_class = tmp_value;
1674 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1675 } else {
1676 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1677 }
1678 return count;
1679 }
1680
1681 if (!strcmp(name, "skb_priority")) {
1682 len = num_arg(&user_buffer[i], 9, &value);
1683 if (len < 0)
1684 return len;
1685
1686 i += len;
1687 pkt_dev->skb_priority = value;
1688 sprintf(pg_result, "OK: skb_priority=%i",
1689 pkt_dev->skb_priority);
1690 return count;
1691 }
1692
1693 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1694 return -EINVAL;
1695 }
1696
1697 static int pktgen_if_open(struct inode *inode, struct file *file)
1698 {
1699 return single_open(file, pktgen_if_show, PDE_DATA(inode));
1700 }
1701
1702 static const struct file_operations pktgen_if_fops = {
1703 .owner = THIS_MODULE,
1704 .open = pktgen_if_open,
1705 .read = seq_read,
1706 .llseek = seq_lseek,
1707 .write = pktgen_if_write,
1708 .release = single_release,
1709 };
1710
1711 static int pktgen_thread_show(struct seq_file *seq, void *v)
1712 {
1713 struct pktgen_thread *t = seq->private;
1714 const struct pktgen_dev *pkt_dev;
1715
1716 BUG_ON(!t);
1717
1718 seq_printf(seq, "Running: ");
1719
1720 if_lock(t);
1721 list_for_each_entry(pkt_dev, &t->if_list, list)
1722 if (pkt_dev->running)
1723 seq_printf(seq, "%s ", pkt_dev->odevname);
1724
1725 seq_printf(seq, "\nStopped: ");
1726
1727 list_for_each_entry(pkt_dev, &t->if_list, list)
1728 if (!pkt_dev->running)
1729 seq_printf(seq, "%s ", pkt_dev->odevname);
1730
1731 if (t->result[0])
1732 seq_printf(seq, "\nResult: %s\n", t->result);
1733 else
1734 seq_printf(seq, "\nResult: NA\n");
1735
1736 if_unlock(t);
1737
1738 return 0;
1739 }
1740
1741 static ssize_t pktgen_thread_write(struct file *file,
1742 const char __user * user_buffer,
1743 size_t count, loff_t * offset)
1744 {
1745 struct seq_file *seq = file->private_data;
1746 struct pktgen_thread *t = seq->private;
1747 int i, max, len, ret;
1748 char name[40];
1749 char *pg_result;
1750
1751 if (count < 1) {
1752 // sprintf(pg_result, "Wrong command format");
1753 return -EINVAL;
1754 }
1755
1756 max = count;
1757 len = count_trail_chars(user_buffer, max);
1758 if (len < 0)
1759 return len;
1760
1761 i = len;
1762
1763 /* Read variable name */
1764
1765 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1766 if (len < 0)
1767 return len;
1768
1769 memset(name, 0, sizeof(name));
1770 if (copy_from_user(name, &user_buffer[i], len))
1771 return -EFAULT;
1772 i += len;
1773
1774 max = count - i;
1775 len = count_trail_chars(&user_buffer[i], max);
1776 if (len < 0)
1777 return len;
1778
1779 i += len;
1780
1781 if (debug)
1782 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
1783
1784 if (!t) {
1785 pr_err("ERROR: No thread\n");
1786 ret = -EINVAL;
1787 goto out;
1788 }
1789
1790 pg_result = &(t->result[0]);
1791
1792 if (!strcmp(name, "add_device")) {
1793 char f[32];
1794 memset(f, 0, 32);
1795 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1796 if (len < 0) {
1797 ret = len;
1798 goto out;
1799 }
1800 if (copy_from_user(f, &user_buffer[i], len))
1801 return -EFAULT;
1802 i += len;
1803 mutex_lock(&pktgen_thread_lock);
1804 ret = pktgen_add_device(t, f);
1805 mutex_unlock(&pktgen_thread_lock);
1806 if (!ret) {
1807 ret = count;
1808 sprintf(pg_result, "OK: add_device=%s", f);
1809 } else
1810 sprintf(pg_result, "ERROR: can not add device %s", f);
1811 goto out;
1812 }
1813
1814 if (!strcmp(name, "rem_device_all")) {
1815 mutex_lock(&pktgen_thread_lock);
1816 t->control |= T_REMDEVALL;
1817 mutex_unlock(&pktgen_thread_lock);
1818 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1819 ret = count;
1820 sprintf(pg_result, "OK: rem_device_all");
1821 goto out;
1822 }
1823
1824 if (!strcmp(name, "max_before_softirq")) {
1825 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1826 ret = count;
1827 goto out;
1828 }
1829
1830 ret = -EINVAL;
1831 out:
1832 return ret;
1833 }
1834
1835 static int pktgen_thread_open(struct inode *inode, struct file *file)
1836 {
1837 return single_open(file, pktgen_thread_show, PDE_DATA(inode));
1838 }
1839
1840 static const struct file_operations pktgen_thread_fops = {
1841 .owner = THIS_MODULE,
1842 .open = pktgen_thread_open,
1843 .read = seq_read,
1844 .llseek = seq_lseek,
1845 .write = pktgen_thread_write,
1846 .release = single_release,
1847 };
1848
1849 /* Think find or remove for NN */
1850 static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn,
1851 const char *ifname, int remove)
1852 {
1853 struct pktgen_thread *t;
1854 struct pktgen_dev *pkt_dev = NULL;
1855 bool exact = (remove == FIND);
1856
1857 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1858 pkt_dev = pktgen_find_dev(t, ifname, exact);
1859 if (pkt_dev) {
1860 if (remove) {
1861 if_lock(t);
1862 pkt_dev->removal_mark = 1;
1863 t->control |= T_REMDEV;
1864 if_unlock(t);
1865 }
1866 break;
1867 }
1868 }
1869 return pkt_dev;
1870 }
1871
1872 /*
1873 * mark a device for removal
1874 */
1875 static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname)
1876 {
1877 struct pktgen_dev *pkt_dev = NULL;
1878 const int max_tries = 10, msec_per_try = 125;
1879 int i = 0;
1880
1881 mutex_lock(&pktgen_thread_lock);
1882 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1883
1884 while (1) {
1885
1886 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE);
1887 if (pkt_dev == NULL)
1888 break; /* success */
1889
1890 mutex_unlock(&pktgen_thread_lock);
1891 pr_debug("%s: waiting for %s to disappear....\n",
1892 __func__, ifname);
1893 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1894 mutex_lock(&pktgen_thread_lock);
1895
1896 if (++i >= max_tries) {
1897 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1898 __func__, msec_per_try * i, ifname);
1899 break;
1900 }
1901
1902 }
1903
1904 mutex_unlock(&pktgen_thread_lock);
1905 }
1906
1907 static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev)
1908 {
1909 struct pktgen_thread *t;
1910
1911 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1912 struct pktgen_dev *pkt_dev;
1913
1914 list_for_each_entry(pkt_dev, &t->if_list, list) {
1915 if (pkt_dev->odev != dev)
1916 continue;
1917
1918 proc_remove(pkt_dev->entry);
1919
1920 pkt_dev->entry = proc_create_data(dev->name, 0600,
1921 pn->proc_dir,
1922 &pktgen_if_fops,
1923 pkt_dev);
1924 if (!pkt_dev->entry)
1925 pr_err("can't move proc entry for '%s'\n",
1926 dev->name);
1927 break;
1928 }
1929 }
1930 }
1931
1932 static int pktgen_device_event(struct notifier_block *unused,
1933 unsigned long event, void *ptr)
1934 {
1935 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1936 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id);
1937
1938 if (pn->pktgen_exiting)
1939 return NOTIFY_DONE;
1940
1941 /* It is OK that we do not hold the group lock right now,
1942 * as we run under the RTNL lock.
1943 */
1944
1945 switch (event) {
1946 case NETDEV_CHANGENAME:
1947 pktgen_change_name(pn, dev);
1948 break;
1949
1950 case NETDEV_UNREGISTER:
1951 pktgen_mark_device(pn, dev->name);
1952 break;
1953 }
1954
1955 return NOTIFY_DONE;
1956 }
1957
1958 static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn,
1959 struct pktgen_dev *pkt_dev,
1960 const char *ifname)
1961 {
1962 char b[IFNAMSIZ+5];
1963 int i;
1964
1965 for (i = 0; ifname[i] != '@'; i++) {
1966 if (i == IFNAMSIZ)
1967 break;
1968
1969 b[i] = ifname[i];
1970 }
1971 b[i] = 0;
1972
1973 return dev_get_by_name(pn->net, b);
1974 }
1975
1976
1977 /* Associate pktgen_dev with a device. */
1978
1979 static int pktgen_setup_dev(const struct pktgen_net *pn,
1980 struct pktgen_dev *pkt_dev, const char *ifname)
1981 {
1982 struct net_device *odev;
1983 int err;
1984
1985 /* Clean old setups */
1986 if (pkt_dev->odev) {
1987 dev_put(pkt_dev->odev);
1988 pkt_dev->odev = NULL;
1989 }
1990
1991 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname);
1992 if (!odev) {
1993 pr_err("no such netdevice: \"%s\"\n", ifname);
1994 return -ENODEV;
1995 }
1996
1997 if (odev->type != ARPHRD_ETHER) {
1998 pr_err("not an ethernet device: \"%s\"\n", ifname);
1999 err = -EINVAL;
2000 } else if (!netif_running(odev)) {
2001 pr_err("device is down: \"%s\"\n", ifname);
2002 err = -ENETDOWN;
2003 } else {
2004 pkt_dev->odev = odev;
2005 return 0;
2006 }
2007
2008 dev_put(odev);
2009 return err;
2010 }
2011
2012 /* Read pkt_dev from the interface and set up internal pktgen_dev
2013 * structure to have the right information to create/send packets
2014 */
2015 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2016 {
2017 int ntxq;
2018
2019 if (!pkt_dev->odev) {
2020 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2021 sprintf(pkt_dev->result,
2022 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2023 return;
2024 }
2025
2026 /* make sure that we don't pick a non-existing transmit queue */
2027 ntxq = pkt_dev->odev->real_num_tx_queues;
2028
2029 if (ntxq <= pkt_dev->queue_map_min) {
2030 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2031 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2032 pkt_dev->odevname);
2033 pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2034 }
2035 if (pkt_dev->queue_map_max >= ntxq) {
2036 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2037 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2038 pkt_dev->odevname);
2039 pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2040 }
2041
2042 /* Default to the interface's mac if not explicitly set. */
2043
2044 if (is_zero_ether_addr(pkt_dev->src_mac))
2045 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2046
2047 /* Set up Dest MAC */
2048 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2049
2050 if (pkt_dev->flags & F_IPV6) {
2051 int i, set = 0, err = 1;
2052 struct inet6_dev *idev;
2053
2054 if (pkt_dev->min_pkt_size == 0) {
2055 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
2056 + sizeof(struct udphdr)
2057 + sizeof(struct pktgen_hdr)
2058 + pkt_dev->pkt_overhead;
2059 }
2060
2061 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2062 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2063 set = 1;
2064 break;
2065 }
2066
2067 if (!set) {
2068
2069 /*
2070 * Use linklevel address if unconfigured.
2071 *
2072 * use ipv6_get_lladdr if/when it's get exported
2073 */
2074
2075 rcu_read_lock();
2076 idev = __in6_dev_get(pkt_dev->odev);
2077 if (idev) {
2078 struct inet6_ifaddr *ifp;
2079
2080 read_lock_bh(&idev->lock);
2081 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2082 if ((ifp->scope & IFA_LINK) &&
2083 !(ifp->flags & IFA_F_TENTATIVE)) {
2084 pkt_dev->cur_in6_saddr = ifp->addr;
2085 err = 0;
2086 break;
2087 }
2088 }
2089 read_unlock_bh(&idev->lock);
2090 }
2091 rcu_read_unlock();
2092 if (err)
2093 pr_err("ERROR: IPv6 link address not available\n");
2094 }
2095 } else {
2096 if (pkt_dev->min_pkt_size == 0) {
2097 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
2098 + sizeof(struct udphdr)
2099 + sizeof(struct pktgen_hdr)
2100 + pkt_dev->pkt_overhead;
2101 }
2102
2103 pkt_dev->saddr_min = 0;
2104 pkt_dev->saddr_max = 0;
2105 if (strlen(pkt_dev->src_min) == 0) {
2106
2107 struct in_device *in_dev;
2108
2109 rcu_read_lock();
2110 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2111 if (in_dev) {
2112 if (in_dev->ifa_list) {
2113 pkt_dev->saddr_min =
2114 in_dev->ifa_list->ifa_address;
2115 pkt_dev->saddr_max = pkt_dev->saddr_min;
2116 }
2117 }
2118 rcu_read_unlock();
2119 } else {
2120 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2121 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2122 }
2123
2124 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2125 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2126 }
2127 /* Initialize current values. */
2128 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2129 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
2130 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
2131
2132 pkt_dev->cur_dst_mac_offset = 0;
2133 pkt_dev->cur_src_mac_offset = 0;
2134 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2135 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2136 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2137 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2138 pkt_dev->nflows = 0;
2139 }
2140
2141
2142 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2143 {
2144 ktime_t start_time, end_time;
2145 s64 remaining;
2146 struct hrtimer_sleeper t;
2147
2148 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2149 hrtimer_set_expires(&t.timer, spin_until);
2150
2151 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2152 if (remaining <= 0) {
2153 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2154 return;
2155 }
2156
2157 start_time = ktime_get();
2158 if (remaining < 100000) {
2159 /* for small delays (<100us), just loop until limit is reached */
2160 do {
2161 end_time = ktime_get();
2162 } while (ktime_compare(end_time, spin_until) < 0);
2163 } else {
2164 /* see do_nanosleep */
2165 hrtimer_init_sleeper(&t, current);
2166 do {
2167 set_current_state(TASK_INTERRUPTIBLE);
2168 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2169 if (!hrtimer_active(&t.timer))
2170 t.task = NULL;
2171
2172 if (likely(t.task))
2173 schedule();
2174
2175 hrtimer_cancel(&t.timer);
2176 } while (t.task && pkt_dev->running && !signal_pending(current));
2177 __set_current_state(TASK_RUNNING);
2178 end_time = ktime_get();
2179 }
2180
2181 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2182 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2183 }
2184
2185 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2186 {
2187 pkt_dev->pkt_overhead = 0;
2188 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2189 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2190 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2191 }
2192
2193 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2194 {
2195 return !!(pkt_dev->flows[flow].flags & F_INIT);
2196 }
2197
2198 static inline int f_pick(struct pktgen_dev *pkt_dev)
2199 {
2200 int flow = pkt_dev->curfl;
2201
2202 if (pkt_dev->flags & F_FLOW_SEQ) {
2203 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2204 /* reset time */
2205 pkt_dev->flows[flow].count = 0;
2206 pkt_dev->flows[flow].flags = 0;
2207 pkt_dev->curfl += 1;
2208 if (pkt_dev->curfl >= pkt_dev->cflows)
2209 pkt_dev->curfl = 0; /*reset */
2210 }
2211 } else {
2212 flow = prandom_u32() % pkt_dev->cflows;
2213 pkt_dev->curfl = flow;
2214
2215 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2216 pkt_dev->flows[flow].count = 0;
2217 pkt_dev->flows[flow].flags = 0;
2218 }
2219 }
2220
2221 return pkt_dev->curfl;
2222 }
2223
2224
2225 #ifdef CONFIG_XFRM
2226 /* If there was already an IPSEC SA, we keep it as is, else
2227 * we go look for it ...
2228 */
2229 #define DUMMY_MARK 0
2230 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2231 {
2232 struct xfrm_state *x = pkt_dev->flows[flow].x;
2233 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
2234 if (!x) {
2235 /*slow path: we dont already have xfrm_state*/
2236 x = xfrm_stateonly_find(pn->net, DUMMY_MARK,
2237 (xfrm_address_t *)&pkt_dev->cur_daddr,
2238 (xfrm_address_t *)&pkt_dev->cur_saddr,
2239 AF_INET,
2240 pkt_dev->ipsmode,
2241 pkt_dev->ipsproto, 0);
2242 if (x) {
2243 pkt_dev->flows[flow].x = x;
2244 set_pkt_overhead(pkt_dev);
2245 pkt_dev->pkt_overhead += x->props.header_len;
2246 }
2247
2248 }
2249 }
2250 #endif
2251 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2252 {
2253
2254 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2255 pkt_dev->cur_queue_map = smp_processor_id();
2256
2257 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2258 __u16 t;
2259 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2260 t = prandom_u32() %
2261 (pkt_dev->queue_map_max -
2262 pkt_dev->queue_map_min + 1)
2263 + pkt_dev->queue_map_min;
2264 } else {
2265 t = pkt_dev->cur_queue_map + 1;
2266 if (t > pkt_dev->queue_map_max)
2267 t = pkt_dev->queue_map_min;
2268 }
2269 pkt_dev->cur_queue_map = t;
2270 }
2271 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2272 }
2273
2274 /* Increment/randomize headers according to flags and current values
2275 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2276 */
2277 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2278 {
2279 __u32 imn;
2280 __u32 imx;
2281 int flow = 0;
2282
2283 if (pkt_dev->cflows)
2284 flow = f_pick(pkt_dev);
2285
2286 /* Deal with source MAC */
2287 if (pkt_dev->src_mac_count > 1) {
2288 __u32 mc;
2289 __u32 tmp;
2290
2291 if (pkt_dev->flags & F_MACSRC_RND)
2292 mc = prandom_u32() % pkt_dev->src_mac_count;
2293 else {
2294 mc = pkt_dev->cur_src_mac_offset++;
2295 if (pkt_dev->cur_src_mac_offset >=
2296 pkt_dev->src_mac_count)
2297 pkt_dev->cur_src_mac_offset = 0;
2298 }
2299
2300 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2301 pkt_dev->hh[11] = tmp;
2302 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2303 pkt_dev->hh[10] = tmp;
2304 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2305 pkt_dev->hh[9] = tmp;
2306 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2307 pkt_dev->hh[8] = tmp;
2308 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2309 pkt_dev->hh[7] = tmp;
2310 }
2311
2312 /* Deal with Destination MAC */
2313 if (pkt_dev->dst_mac_count > 1) {
2314 __u32 mc;
2315 __u32 tmp;
2316
2317 if (pkt_dev->flags & F_MACDST_RND)
2318 mc = prandom_u32() % pkt_dev->dst_mac_count;
2319
2320 else {
2321 mc = pkt_dev->cur_dst_mac_offset++;
2322 if (pkt_dev->cur_dst_mac_offset >=
2323 pkt_dev->dst_mac_count) {
2324 pkt_dev->cur_dst_mac_offset = 0;
2325 }
2326 }
2327
2328 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2329 pkt_dev->hh[5] = tmp;
2330 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2331 pkt_dev->hh[4] = tmp;
2332 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2333 pkt_dev->hh[3] = tmp;
2334 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2335 pkt_dev->hh[2] = tmp;
2336 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2337 pkt_dev->hh[1] = tmp;
2338 }
2339
2340 if (pkt_dev->flags & F_MPLS_RND) {
2341 unsigned int i;
2342 for (i = 0; i < pkt_dev->nr_labels; i++)
2343 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2344 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2345 ((__force __be32)prandom_u32() &
2346 htonl(0x000fffff));
2347 }
2348
2349 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2350 pkt_dev->vlan_id = prandom_u32() & (4096 - 1);
2351 }
2352
2353 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2354 pkt_dev->svlan_id = prandom_u32() & (4096 - 1);
2355 }
2356
2357 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2358 if (pkt_dev->flags & F_UDPSRC_RND)
2359 pkt_dev->cur_udp_src = prandom_u32() %
2360 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2361 + pkt_dev->udp_src_min;
2362
2363 else {
2364 pkt_dev->cur_udp_src++;
2365 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2366 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2367 }
2368 }
2369
2370 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2371 if (pkt_dev->flags & F_UDPDST_RND) {
2372 pkt_dev->cur_udp_dst = prandom_u32() %
2373 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2374 + pkt_dev->udp_dst_min;
2375 } else {
2376 pkt_dev->cur_udp_dst++;
2377 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2378 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2379 }
2380 }
2381
2382 if (!(pkt_dev->flags & F_IPV6)) {
2383
2384 imn = ntohl(pkt_dev->saddr_min);
2385 imx = ntohl(pkt_dev->saddr_max);
2386 if (imn < imx) {
2387 __u32 t;
2388 if (pkt_dev->flags & F_IPSRC_RND)
2389 t = prandom_u32() % (imx - imn) + imn;
2390 else {
2391 t = ntohl(pkt_dev->cur_saddr);
2392 t++;
2393 if (t > imx)
2394 t = imn;
2395
2396 }
2397 pkt_dev->cur_saddr = htonl(t);
2398 }
2399
2400 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2401 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2402 } else {
2403 imn = ntohl(pkt_dev->daddr_min);
2404 imx = ntohl(pkt_dev->daddr_max);
2405 if (imn < imx) {
2406 __u32 t;
2407 __be32 s;
2408 if (pkt_dev->flags & F_IPDST_RND) {
2409
2410 do {
2411 t = prandom_u32() %
2412 (imx - imn) + imn;
2413 s = htonl(t);
2414 } while (ipv4_is_loopback(s) ||
2415 ipv4_is_multicast(s) ||
2416 ipv4_is_lbcast(s) ||
2417 ipv4_is_zeronet(s) ||
2418 ipv4_is_local_multicast(s));
2419 pkt_dev->cur_daddr = s;
2420 } else {
2421 t = ntohl(pkt_dev->cur_daddr);
2422 t++;
2423 if (t > imx) {
2424 t = imn;
2425 }
2426 pkt_dev->cur_daddr = htonl(t);
2427 }
2428 }
2429 if (pkt_dev->cflows) {
2430 pkt_dev->flows[flow].flags |= F_INIT;
2431 pkt_dev->flows[flow].cur_daddr =
2432 pkt_dev->cur_daddr;
2433 #ifdef CONFIG_XFRM
2434 if (pkt_dev->flags & F_IPSEC_ON)
2435 get_ipsec_sa(pkt_dev, flow);
2436 #endif
2437 pkt_dev->nflows++;
2438 }
2439 }
2440 } else { /* IPV6 * */
2441
2442 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
2443 int i;
2444
2445 /* Only random destinations yet */
2446
2447 for (i = 0; i < 4; i++) {
2448 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2449 (((__force __be32)prandom_u32() |
2450 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2451 pkt_dev->max_in6_daddr.s6_addr32[i]);
2452 }
2453 }
2454 }
2455
2456 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2457 __u32 t;
2458 if (pkt_dev->flags & F_TXSIZE_RND) {
2459 t = prandom_u32() %
2460 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2461 + pkt_dev->min_pkt_size;
2462 } else {
2463 t = pkt_dev->cur_pkt_size + 1;
2464 if (t > pkt_dev->max_pkt_size)
2465 t = pkt_dev->min_pkt_size;
2466 }
2467 pkt_dev->cur_pkt_size = t;
2468 }
2469
2470 set_cur_queue_map(pkt_dev);
2471
2472 pkt_dev->flows[flow].count++;
2473 }
2474
2475
2476 #ifdef CONFIG_XFRM
2477 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2478 {
2479 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2480 int err = 0;
2481
2482 if (!x)
2483 return 0;
2484 /* XXX: we dont support tunnel mode for now until
2485 * we resolve the dst issue */
2486 if (x->props.mode != XFRM_MODE_TRANSPORT)
2487 return 0;
2488
2489 spin_lock(&x->lock);
2490
2491 err = x->outer_mode->output(x, skb);
2492 if (err)
2493 goto error;
2494 err = x->type->output(x, skb);
2495 if (err)
2496 goto error;
2497
2498 x->curlft.bytes += skb->len;
2499 x->curlft.packets++;
2500 error:
2501 spin_unlock(&x->lock);
2502 return err;
2503 }
2504
2505 static void free_SAs(struct pktgen_dev *pkt_dev)
2506 {
2507 if (pkt_dev->cflows) {
2508 /* let go of the SAs if we have them */
2509 int i;
2510 for (i = 0; i < pkt_dev->cflows; i++) {
2511 struct xfrm_state *x = pkt_dev->flows[i].x;
2512 if (x) {
2513 xfrm_state_put(x);
2514 pkt_dev->flows[i].x = NULL;
2515 }
2516 }
2517 }
2518 }
2519
2520 static int process_ipsec(struct pktgen_dev *pkt_dev,
2521 struct sk_buff *skb, __be16 protocol)
2522 {
2523 if (pkt_dev->flags & F_IPSEC_ON) {
2524 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2525 int nhead = 0;
2526 if (x) {
2527 int ret;
2528 __u8 *eth;
2529 nhead = x->props.header_len - skb_headroom(skb);
2530 if (nhead > 0) {
2531 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2532 if (ret < 0) {
2533 pr_err("Error expanding ipsec packet %d\n",
2534 ret);
2535 goto err;
2536 }
2537 }
2538
2539 /* ipsec is not expecting ll header */
2540 skb_pull(skb, ETH_HLEN);
2541 ret = pktgen_output_ipsec(skb, pkt_dev);
2542 if (ret) {
2543 pr_err("Error creating ipsec packet %d\n", ret);
2544 goto err;
2545 }
2546 /* restore ll */
2547 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2548 memcpy(eth, pkt_dev->hh, 12);
2549 *(u16 *) &eth[12] = protocol;
2550 }
2551 }
2552 return 1;
2553 err:
2554 kfree_skb(skb);
2555 return 0;
2556 }
2557 #endif
2558
2559 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2560 {
2561 unsigned int i;
2562 for (i = 0; i < pkt_dev->nr_labels; i++)
2563 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2564
2565 mpls--;
2566 *mpls |= MPLS_STACK_BOTTOM;
2567 }
2568
2569 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2570 unsigned int prio)
2571 {
2572 return htons(id | (cfi << 12) | (prio << 13));
2573 }
2574
2575 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2576 int datalen)
2577 {
2578 struct timeval timestamp;
2579 struct pktgen_hdr *pgh;
2580
2581 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
2582 datalen -= sizeof(*pgh);
2583
2584 if (pkt_dev->nfrags <= 0) {
2585 memset(skb_put(skb, datalen), 0, datalen);
2586 } else {
2587 int frags = pkt_dev->nfrags;
2588 int i, len;
2589 int frag_len;
2590
2591
2592 if (frags > MAX_SKB_FRAGS)
2593 frags = MAX_SKB_FRAGS;
2594 len = datalen - frags * PAGE_SIZE;
2595 if (len > 0) {
2596 memset(skb_put(skb, len), 0, len);
2597 datalen = frags * PAGE_SIZE;
2598 }
2599
2600 i = 0;
2601 frag_len = (datalen/frags) < PAGE_SIZE ?
2602 (datalen/frags) : PAGE_SIZE;
2603 while (datalen > 0) {
2604 if (unlikely(!pkt_dev->page)) {
2605 int node = numa_node_id();
2606
2607 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2608 node = pkt_dev->node;
2609 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2610 if (!pkt_dev->page)
2611 break;
2612 }
2613 get_page(pkt_dev->page);
2614 skb_frag_set_page(skb, i, pkt_dev->page);
2615 skb_shinfo(skb)->frags[i].page_offset = 0;
2616 /*last fragment, fill rest of data*/
2617 if (i == (frags - 1))
2618 skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2619 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2620 else
2621 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2622 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2623 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2624 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2625 i++;
2626 skb_shinfo(skb)->nr_frags = i;
2627 }
2628 }
2629
2630 /* Stamp the time, and sequence number,
2631 * convert them to network byte order
2632 */
2633 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2634 pgh->seq_num = htonl(pkt_dev->seq_num);
2635
2636 do_gettimeofday(&timestamp);
2637 pgh->tv_sec = htonl(timestamp.tv_sec);
2638 pgh->tv_usec = htonl(timestamp.tv_usec);
2639 }
2640
2641 static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
2642 struct pktgen_dev *pkt_dev,
2643 unsigned int extralen)
2644 {
2645 struct sk_buff *skb = NULL;
2646 unsigned int size = pkt_dev->cur_pkt_size + 64 + extralen +
2647 pkt_dev->pkt_overhead;
2648
2649 if (pkt_dev->flags & F_NODE) {
2650 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id();
2651
2652 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node);
2653 if (likely(skb)) {
2654 skb_reserve(skb, NET_SKB_PAD);
2655 skb->dev = dev;
2656 }
2657 } else {
2658 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
2659 }
2660
2661 return skb;
2662 }
2663
2664 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2665 struct pktgen_dev *pkt_dev)
2666 {
2667 struct sk_buff *skb = NULL;
2668 __u8 *eth;
2669 struct udphdr *udph;
2670 int datalen, iplen;
2671 struct iphdr *iph;
2672 __be16 protocol = htons(ETH_P_IP);
2673 __be32 *mpls;
2674 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2675 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2676 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2677 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2678 u16 queue_map;
2679
2680 if (pkt_dev->nr_labels)
2681 protocol = htons(ETH_P_MPLS_UC);
2682
2683 if (pkt_dev->vlan_id != 0xffff)
2684 protocol = htons(ETH_P_8021Q);
2685
2686 /* Update any of the values, used when we're incrementing various
2687 * fields.
2688 */
2689 mod_cur_headers(pkt_dev);
2690 queue_map = pkt_dev->cur_queue_map;
2691
2692 datalen = (odev->hard_header_len + 16) & ~0xf;
2693
2694 skb = pktgen_alloc_skb(odev, pkt_dev, datalen);
2695 if (!skb) {
2696 sprintf(pkt_dev->result, "No memory");
2697 return NULL;
2698 }
2699
2700 prefetchw(skb->data);
2701 skb_reserve(skb, datalen);
2702
2703 /* Reserve for ethernet and IP header */
2704 eth = (__u8 *) skb_push(skb, 14);
2705 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2706 if (pkt_dev->nr_labels)
2707 mpls_push(mpls, pkt_dev);
2708
2709 if (pkt_dev->vlan_id != 0xffff) {
2710 if (pkt_dev->svlan_id != 0xffff) {
2711 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2712 *svlan_tci = build_tci(pkt_dev->svlan_id,
2713 pkt_dev->svlan_cfi,
2714 pkt_dev->svlan_p);
2715 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2716 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2717 }
2718 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2719 *vlan_tci = build_tci(pkt_dev->vlan_id,
2720 pkt_dev->vlan_cfi,
2721 pkt_dev->vlan_p);
2722 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2723 *vlan_encapsulated_proto = htons(ETH_P_IP);
2724 }
2725
2726 skb_set_mac_header(skb, 0);
2727 skb_set_network_header(skb, skb->len);
2728 iph = (struct iphdr *) skb_put(skb, sizeof(struct iphdr));
2729
2730 skb_set_transport_header(skb, skb->len);
2731 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2732 skb_set_queue_mapping(skb, queue_map);
2733 skb->priority = pkt_dev->skb_priority;
2734
2735 memcpy(eth, pkt_dev->hh, 12);
2736 *(__be16 *) & eth[12] = protocol;
2737
2738 /* Eth + IPh + UDPh + mpls */
2739 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2740 pkt_dev->pkt_overhead;
2741 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
2742 datalen = sizeof(struct pktgen_hdr);
2743
2744 udph->source = htons(pkt_dev->cur_udp_src);
2745 udph->dest = htons(pkt_dev->cur_udp_dst);
2746 udph->len = htons(datalen + 8); /* DATA + udphdr */
2747 udph->check = 0;
2748
2749 iph->ihl = 5;
2750 iph->version = 4;
2751 iph->ttl = 32;
2752 iph->tos = pkt_dev->tos;
2753 iph->protocol = IPPROTO_UDP; /* UDP */
2754 iph->saddr = pkt_dev->cur_saddr;
2755 iph->daddr = pkt_dev->cur_daddr;
2756 iph->id = htons(pkt_dev->ip_id);
2757 pkt_dev->ip_id++;
2758 iph->frag_off = 0;
2759 iplen = 20 + 8 + datalen;
2760 iph->tot_len = htons(iplen);
2761 iph->check = 0;
2762 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2763 skb->protocol = protocol;
2764 skb->dev = odev;
2765 skb->pkt_type = PACKET_HOST;
2766
2767 if (!(pkt_dev->flags & F_UDPCSUM)) {
2768 skb->ip_summed = CHECKSUM_NONE;
2769 } else if (odev->features & NETIF_F_V4_CSUM) {
2770 skb->ip_summed = CHECKSUM_PARTIAL;
2771 skb->csum = 0;
2772 udp4_hwcsum(skb, udph->source, udph->dest);
2773 } else {
2774 __wsum csum = udp_csum(skb);
2775
2776 /* add protocol-dependent pseudo-header */
2777 udph->check = csum_tcpudp_magic(udph->source, udph->dest,
2778 datalen + 8, IPPROTO_UDP, csum);
2779
2780 if (udph->check == 0)
2781 udph->check = CSUM_MANGLED_0;
2782 }
2783
2784 pktgen_finalize_skb(pkt_dev, skb, datalen);
2785
2786 #ifdef CONFIG_XFRM
2787 if (!process_ipsec(pkt_dev, skb, protocol))
2788 return NULL;
2789 #endif
2790
2791 return skb;
2792 }
2793
2794 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2795 struct pktgen_dev *pkt_dev)
2796 {
2797 struct sk_buff *skb = NULL;
2798 __u8 *eth;
2799 struct udphdr *udph;
2800 int datalen, udplen;
2801 struct ipv6hdr *iph;
2802 __be16 protocol = htons(ETH_P_IPV6);
2803 __be32 *mpls;
2804 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2805 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2806 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2807 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2808 u16 queue_map;
2809
2810 if (pkt_dev->nr_labels)
2811 protocol = htons(ETH_P_MPLS_UC);
2812
2813 if (pkt_dev->vlan_id != 0xffff)
2814 protocol = htons(ETH_P_8021Q);
2815
2816 /* Update any of the values, used when we're incrementing various
2817 * fields.
2818 */
2819 mod_cur_headers(pkt_dev);
2820 queue_map = pkt_dev->cur_queue_map;
2821
2822 skb = pktgen_alloc_skb(odev, pkt_dev, 16);
2823 if (!skb) {
2824 sprintf(pkt_dev->result, "No memory");
2825 return NULL;
2826 }
2827
2828 prefetchw(skb->data);
2829 skb_reserve(skb, 16);
2830
2831 /* Reserve for ethernet and IP header */
2832 eth = (__u8 *) skb_push(skb, 14);
2833 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2834 if (pkt_dev->nr_labels)
2835 mpls_push(mpls, pkt_dev);
2836
2837 if (pkt_dev->vlan_id != 0xffff) {
2838 if (pkt_dev->svlan_id != 0xffff) {
2839 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2840 *svlan_tci = build_tci(pkt_dev->svlan_id,
2841 pkt_dev->svlan_cfi,
2842 pkt_dev->svlan_p);
2843 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2844 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2845 }
2846 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2847 *vlan_tci = build_tci(pkt_dev->vlan_id,
2848 pkt_dev->vlan_cfi,
2849 pkt_dev->vlan_p);
2850 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2851 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2852 }
2853
2854 skb_set_mac_header(skb, 0);
2855 skb_set_network_header(skb, skb->len);
2856 iph = (struct ipv6hdr *) skb_put(skb, sizeof(struct ipv6hdr));
2857
2858 skb_set_transport_header(skb, skb->len);
2859 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2860 skb_set_queue_mapping(skb, queue_map);
2861 skb->priority = pkt_dev->skb_priority;
2862
2863 memcpy(eth, pkt_dev->hh, 12);
2864 *(__be16 *) &eth[12] = protocol;
2865
2866 /* Eth + IPh + UDPh + mpls */
2867 datalen = pkt_dev->cur_pkt_size - 14 -
2868 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2869 pkt_dev->pkt_overhead;
2870
2871 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
2872 datalen = sizeof(struct pktgen_hdr);
2873 net_info_ratelimited("increased datalen to %d\n", datalen);
2874 }
2875
2876 udplen = datalen + sizeof(struct udphdr);
2877 udph->source = htons(pkt_dev->cur_udp_src);
2878 udph->dest = htons(pkt_dev->cur_udp_dst);
2879 udph->len = htons(udplen);
2880 udph->check = 0;
2881
2882 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2883
2884 if (pkt_dev->traffic_class) {
2885 /* Version + traffic class + flow (0) */
2886 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2887 }
2888
2889 iph->hop_limit = 32;
2890
2891 iph->payload_len = htons(udplen);
2892 iph->nexthdr = IPPROTO_UDP;
2893
2894 iph->daddr = pkt_dev->cur_in6_daddr;
2895 iph->saddr = pkt_dev->cur_in6_saddr;
2896
2897 skb->protocol = protocol;
2898 skb->dev = odev;
2899 skb->pkt_type = PACKET_HOST;
2900
2901 if (!(pkt_dev->flags & F_UDPCSUM)) {
2902 skb->ip_summed = CHECKSUM_NONE;
2903 } else if (odev->features & NETIF_F_V6_CSUM) {
2904 skb->ip_summed = CHECKSUM_PARTIAL;
2905 skb->csum_start = skb_transport_header(skb) - skb->head;
2906 skb->csum_offset = offsetof(struct udphdr, check);
2907 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0);
2908 } else {
2909 __wsum csum = udp_csum(skb);
2910
2911 /* add protocol-dependent pseudo-header */
2912 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum);
2913
2914 if (udph->check == 0)
2915 udph->check = CSUM_MANGLED_0;
2916 }
2917
2918 pktgen_finalize_skb(pkt_dev, skb, datalen);
2919
2920 return skb;
2921 }
2922
2923 static struct sk_buff *fill_packet(struct net_device *odev,
2924 struct pktgen_dev *pkt_dev)
2925 {
2926 if (pkt_dev->flags & F_IPV6)
2927 return fill_packet_ipv6(odev, pkt_dev);
2928 else
2929 return fill_packet_ipv4(odev, pkt_dev);
2930 }
2931
2932 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2933 {
2934 pkt_dev->seq_num = 1;
2935 pkt_dev->idle_acc = 0;
2936 pkt_dev->sofar = 0;
2937 pkt_dev->tx_bytes = 0;
2938 pkt_dev->errors = 0;
2939 }
2940
2941 /* Set up structure for sending pkts, clear counters */
2942
2943 static void pktgen_run(struct pktgen_thread *t)
2944 {
2945 struct pktgen_dev *pkt_dev;
2946 int started = 0;
2947
2948 func_enter();
2949
2950 if_lock(t);
2951 list_for_each_entry(pkt_dev, &t->if_list, list) {
2952
2953 /*
2954 * setup odev and create initial packet.
2955 */
2956 pktgen_setup_inject(pkt_dev);
2957
2958 if (pkt_dev->odev) {
2959 pktgen_clear_counters(pkt_dev);
2960 pkt_dev->running = 1; /* Cranke yeself! */
2961 pkt_dev->skb = NULL;
2962 pkt_dev->started_at = pkt_dev->next_tx = ktime_get();
2963
2964 set_pkt_overhead(pkt_dev);
2965
2966 strcpy(pkt_dev->result, "Starting");
2967 started++;
2968 } else
2969 strcpy(pkt_dev->result, "Error starting");
2970 }
2971 if_unlock(t);
2972 if (started)
2973 t->control &= ~(T_STOP);
2974 }
2975
2976 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn)
2977 {
2978 struct pktgen_thread *t;
2979
2980 func_enter();
2981
2982 mutex_lock(&pktgen_thread_lock);
2983
2984 list_for_each_entry(t, &pn->pktgen_threads, th_list)
2985 t->control |= T_STOP;
2986
2987 mutex_unlock(&pktgen_thread_lock);
2988 }
2989
2990 static int thread_is_running(const struct pktgen_thread *t)
2991 {
2992 const struct pktgen_dev *pkt_dev;
2993
2994 list_for_each_entry(pkt_dev, &t->if_list, list)
2995 if (pkt_dev->running)
2996 return 1;
2997 return 0;
2998 }
2999
3000 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3001 {
3002 if_lock(t);
3003
3004 while (thread_is_running(t)) {
3005
3006 if_unlock(t);
3007
3008 msleep_interruptible(100);
3009
3010 if (signal_pending(current))
3011 goto signal;
3012 if_lock(t);
3013 }
3014 if_unlock(t);
3015 return 1;
3016 signal:
3017 return 0;
3018 }
3019
3020 static int pktgen_wait_all_threads_run(struct pktgen_net *pn)
3021 {
3022 struct pktgen_thread *t;
3023 int sig = 1;
3024
3025 mutex_lock(&pktgen_thread_lock);
3026
3027 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
3028 sig = pktgen_wait_thread_run(t);
3029 if (sig == 0)
3030 break;
3031 }
3032
3033 if (sig == 0)
3034 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3035 t->control |= (T_STOP);
3036
3037 mutex_unlock(&pktgen_thread_lock);
3038 return sig;
3039 }
3040
3041 static void pktgen_run_all_threads(struct pktgen_net *pn)
3042 {
3043 struct pktgen_thread *t;
3044
3045 func_enter();
3046
3047 mutex_lock(&pktgen_thread_lock);
3048
3049 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3050 t->control |= (T_RUN);
3051
3052 mutex_unlock(&pktgen_thread_lock);
3053
3054 /* Propagate thread->control */
3055 schedule_timeout_interruptible(msecs_to_jiffies(125));
3056
3057 pktgen_wait_all_threads_run(pn);
3058 }
3059
3060 static void pktgen_reset_all_threads(struct pktgen_net *pn)
3061 {
3062 struct pktgen_thread *t;
3063
3064 func_enter();
3065
3066 mutex_lock(&pktgen_thread_lock);
3067
3068 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3069 t->control |= (T_REMDEVALL);
3070
3071 mutex_unlock(&pktgen_thread_lock);
3072
3073 /* Propagate thread->control */
3074 schedule_timeout_interruptible(msecs_to_jiffies(125));
3075
3076 pktgen_wait_all_threads_run(pn);
3077 }
3078
3079 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3080 {
3081 __u64 bps, mbps, pps;
3082 char *p = pkt_dev->result;
3083 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3084 pkt_dev->started_at);
3085 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3086
3087 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3088 (unsigned long long)ktime_to_us(elapsed),
3089 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3090 (unsigned long long)ktime_to_us(idle),
3091 (unsigned long long)pkt_dev->sofar,
3092 pkt_dev->cur_pkt_size, nr_frags);
3093
3094 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3095 ktime_to_ns(elapsed));
3096
3097 bps = pps * 8 * pkt_dev->cur_pkt_size;
3098
3099 mbps = bps;
3100 do_div(mbps, 1000000);
3101 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3102 (unsigned long long)pps,
3103 (unsigned long long)mbps,
3104 (unsigned long long)bps,
3105 (unsigned long long)pkt_dev->errors);
3106 }
3107
3108 /* Set stopped-at timer, remove from running list, do counters & statistics */
3109 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3110 {
3111 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3112
3113 if (!pkt_dev->running) {
3114 pr_warning("interface: %s is already stopped\n",
3115 pkt_dev->odevname);
3116 return -EINVAL;
3117 }
3118
3119 kfree_skb(pkt_dev->skb);
3120 pkt_dev->skb = NULL;
3121 pkt_dev->stopped_at = ktime_get();
3122 pkt_dev->running = 0;
3123
3124 show_results(pkt_dev, nr_frags);
3125
3126 return 0;
3127 }
3128
3129 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3130 {
3131 struct pktgen_dev *pkt_dev, *best = NULL;
3132
3133 if_lock(t);
3134
3135 list_for_each_entry(pkt_dev, &t->if_list, list) {
3136 if (!pkt_dev->running)
3137 continue;
3138 if (best == NULL)
3139 best = pkt_dev;
3140 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0)
3141 best = pkt_dev;
3142 }
3143 if_unlock(t);
3144 return best;
3145 }
3146
3147 static void pktgen_stop(struct pktgen_thread *t)
3148 {
3149 struct pktgen_dev *pkt_dev;
3150
3151 func_enter();
3152
3153 if_lock(t);
3154
3155 list_for_each_entry(pkt_dev, &t->if_list, list) {
3156 pktgen_stop_device(pkt_dev);
3157 }
3158
3159 if_unlock(t);
3160 }
3161
3162 /*
3163 * one of our devices needs to be removed - find it
3164 * and remove it
3165 */
3166 static void pktgen_rem_one_if(struct pktgen_thread *t)
3167 {
3168 struct list_head *q, *n;
3169 struct pktgen_dev *cur;
3170
3171 func_enter();
3172
3173 if_lock(t);
3174
3175 list_for_each_safe(q, n, &t->if_list) {
3176 cur = list_entry(q, struct pktgen_dev, list);
3177
3178 if (!cur->removal_mark)
3179 continue;
3180
3181 kfree_skb(cur->skb);
3182 cur->skb = NULL;
3183
3184 pktgen_remove_device(t, cur);
3185
3186 break;
3187 }
3188
3189 if_unlock(t);
3190 }
3191
3192 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3193 {
3194 struct list_head *q, *n;
3195 struct pktgen_dev *cur;
3196
3197 func_enter();
3198
3199 /* Remove all devices, free mem */
3200
3201 if_lock(t);
3202
3203 list_for_each_safe(q, n, &t->if_list) {
3204 cur = list_entry(q, struct pktgen_dev, list);
3205
3206 kfree_skb(cur->skb);
3207 cur->skb = NULL;
3208
3209 pktgen_remove_device(t, cur);
3210 }
3211
3212 if_unlock(t);
3213 }
3214
3215 static void pktgen_rem_thread(struct pktgen_thread *t)
3216 {
3217 /* Remove from the thread list */
3218 remove_proc_entry(t->tsk->comm, t->net->proc_dir);
3219 }
3220
3221 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3222 {
3223 ktime_t idle_start = ktime_get();
3224 schedule();
3225 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3226 }
3227
3228 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3229 {
3230 ktime_t idle_start = ktime_get();
3231
3232 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3233 if (signal_pending(current))
3234 break;
3235
3236 if (need_resched())
3237 pktgen_resched(pkt_dev);
3238 else
3239 cpu_relax();
3240 }
3241 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3242 }
3243
3244 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3245 {
3246 struct net_device *odev = pkt_dev->odev;
3247 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3248 = odev->netdev_ops->ndo_start_xmit;
3249 struct netdev_queue *txq;
3250 u16 queue_map;
3251 int ret;
3252
3253 /* If device is offline, then don't send */
3254 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3255 pktgen_stop_device(pkt_dev);
3256 return;
3257 }
3258
3259 /* This is max DELAY, this has special meaning of
3260 * "never transmit"
3261 */
3262 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3263 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
3264 return;
3265 }
3266
3267 /* If no skb or clone count exhausted then get new one */
3268 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3269 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3270 /* build a new pkt */
3271 kfree_skb(pkt_dev->skb);
3272
3273 pkt_dev->skb = fill_packet(odev, pkt_dev);
3274 if (pkt_dev->skb == NULL) {
3275 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3276 schedule();
3277 pkt_dev->clone_count--; /* back out increment, OOM */
3278 return;
3279 }
3280 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3281 pkt_dev->allocated_skbs++;
3282 pkt_dev->clone_count = 0; /* reset counter */
3283 }
3284
3285 if (pkt_dev->delay && pkt_dev->last_ok)
3286 spin(pkt_dev, pkt_dev->next_tx);
3287
3288 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3289 txq = netdev_get_tx_queue(odev, queue_map);
3290
3291 __netif_tx_lock_bh(txq);
3292
3293 if (unlikely(netif_xmit_frozen_or_stopped(txq))) {
3294 ret = NETDEV_TX_BUSY;
3295 pkt_dev->last_ok = 0;
3296 goto unlock;
3297 }
3298 atomic_inc(&(pkt_dev->skb->users));
3299 ret = (*xmit)(pkt_dev->skb, odev);
3300
3301 switch (ret) {
3302 case NETDEV_TX_OK:
3303 txq_trans_update(txq);
3304 pkt_dev->last_ok = 1;
3305 pkt_dev->sofar++;
3306 pkt_dev->seq_num++;
3307 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3308 break;
3309 case NET_XMIT_DROP:
3310 case NET_XMIT_CN:
3311 case NET_XMIT_POLICED:
3312 /* skb has been consumed */
3313 pkt_dev->errors++;
3314 break;
3315 default: /* Drivers are not supposed to return other values! */
3316 net_info_ratelimited("%s xmit error: %d\n",
3317 pkt_dev->odevname, ret);
3318 pkt_dev->errors++;
3319 /* fallthru */
3320 case NETDEV_TX_LOCKED:
3321 case NETDEV_TX_BUSY:
3322 /* Retry it next time */
3323 atomic_dec(&(pkt_dev->skb->users));
3324 pkt_dev->last_ok = 0;
3325 }
3326 unlock:
3327 __netif_tx_unlock_bh(txq);
3328
3329 /* If pkt_dev->count is zero, then run forever */
3330 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3331 pktgen_wait_for_skb(pkt_dev);
3332
3333 /* Done with this */
3334 pktgen_stop_device(pkt_dev);
3335 }
3336 }
3337
3338 /*
3339 * Main loop of the thread goes here
3340 */
3341
3342 static int pktgen_thread_worker(void *arg)
3343 {
3344 DEFINE_WAIT(wait);
3345 struct pktgen_thread *t = arg;
3346 struct pktgen_dev *pkt_dev = NULL;
3347 int cpu = t->cpu;
3348
3349 BUG_ON(smp_processor_id() != cpu);
3350
3351 init_waitqueue_head(&t->queue);
3352 complete(&t->start_done);
3353
3354 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3355
3356 set_current_state(TASK_INTERRUPTIBLE);
3357
3358 set_freezable();
3359
3360 while (!kthread_should_stop()) {
3361 pkt_dev = next_to_run(t);
3362
3363 if (unlikely(!pkt_dev && t->control == 0)) {
3364 if (t->net->pktgen_exiting)
3365 break;
3366 wait_event_interruptible_timeout(t->queue,
3367 t->control != 0,
3368 HZ/10);
3369 try_to_freeze();
3370 continue;
3371 }
3372
3373 __set_current_state(TASK_RUNNING);
3374
3375 if (likely(pkt_dev)) {
3376 pktgen_xmit(pkt_dev);
3377
3378 if (need_resched())
3379 pktgen_resched(pkt_dev);
3380 else
3381 cpu_relax();
3382 }
3383
3384 if (t->control & T_STOP) {
3385 pktgen_stop(t);
3386 t->control &= ~(T_STOP);
3387 }
3388
3389 if (t->control & T_RUN) {
3390 pktgen_run(t);
3391 t->control &= ~(T_RUN);
3392 }
3393
3394 if (t->control & T_REMDEVALL) {
3395 pktgen_rem_all_ifs(t);
3396 t->control &= ~(T_REMDEVALL);
3397 }
3398
3399 if (t->control & T_REMDEV) {
3400 pktgen_rem_one_if(t);
3401 t->control &= ~(T_REMDEV);
3402 }
3403
3404 try_to_freeze();
3405
3406 set_current_state(TASK_INTERRUPTIBLE);
3407 }
3408
3409 pr_debug("%s stopping all device\n", t->tsk->comm);
3410 pktgen_stop(t);
3411
3412 pr_debug("%s removing all device\n", t->tsk->comm);
3413 pktgen_rem_all_ifs(t);
3414
3415 pr_debug("%s removing thread\n", t->tsk->comm);
3416 pktgen_rem_thread(t);
3417
3418 /* Wait for kthread_stop */
3419 while (!kthread_should_stop()) {
3420 set_current_state(TASK_INTERRUPTIBLE);
3421 schedule();
3422 }
3423 __set_current_state(TASK_RUNNING);
3424
3425 return 0;
3426 }
3427
3428 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3429 const char *ifname, bool exact)
3430 {
3431 struct pktgen_dev *p, *pkt_dev = NULL;
3432 size_t len = strlen(ifname);
3433
3434 if_lock(t);
3435 list_for_each_entry(p, &t->if_list, list)
3436 if (strncmp(p->odevname, ifname, len) == 0) {
3437 if (p->odevname[len]) {
3438 if (exact || p->odevname[len] != '@')
3439 continue;
3440 }
3441 pkt_dev = p;
3442 break;
3443 }
3444
3445 if_unlock(t);
3446 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3447 return pkt_dev;
3448 }
3449
3450 /*
3451 * Adds a dev at front of if_list.
3452 */
3453
3454 static int add_dev_to_thread(struct pktgen_thread *t,
3455 struct pktgen_dev *pkt_dev)
3456 {
3457 int rv = 0;
3458
3459 if_lock(t);
3460
3461 if (pkt_dev->pg_thread) {
3462 pr_err("ERROR: already assigned to a thread\n");
3463 rv = -EBUSY;
3464 goto out;
3465 }
3466
3467 list_add(&pkt_dev->list, &t->if_list);
3468 pkt_dev->pg_thread = t;
3469 pkt_dev->running = 0;
3470
3471 out:
3472 if_unlock(t);
3473 return rv;
3474 }
3475
3476 /* Called under thread lock */
3477
3478 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3479 {
3480 struct pktgen_dev *pkt_dev;
3481 int err;
3482 int node = cpu_to_node(t->cpu);
3483
3484 /* We don't allow a device to be on several threads */
3485
3486 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND);
3487 if (pkt_dev) {
3488 pr_err("ERROR: interface already used\n");
3489 return -EBUSY;
3490 }
3491
3492 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3493 if (!pkt_dev)
3494 return -ENOMEM;
3495
3496 strcpy(pkt_dev->odevname, ifname);
3497 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3498 node);
3499 if (pkt_dev->flows == NULL) {
3500 kfree(pkt_dev);
3501 return -ENOMEM;
3502 }
3503
3504 pkt_dev->removal_mark = 0;
3505 pkt_dev->nfrags = 0;
3506 pkt_dev->delay = pg_delay_d;
3507 pkt_dev->count = pg_count_d;
3508 pkt_dev->sofar = 0;
3509 pkt_dev->udp_src_min = 9; /* sink port */
3510 pkt_dev->udp_src_max = 9;
3511 pkt_dev->udp_dst_min = 9;
3512 pkt_dev->udp_dst_max = 9;
3513 pkt_dev->vlan_p = 0;
3514 pkt_dev->vlan_cfi = 0;
3515 pkt_dev->vlan_id = 0xffff;
3516 pkt_dev->svlan_p = 0;
3517 pkt_dev->svlan_cfi = 0;
3518 pkt_dev->svlan_id = 0xffff;
3519 pkt_dev->node = -1;
3520
3521 err = pktgen_setup_dev(t->net, pkt_dev, ifname);
3522 if (err)
3523 goto out1;
3524 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3525 pkt_dev->clone_skb = pg_clone_skb_d;
3526
3527 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir,
3528 &pktgen_if_fops, pkt_dev);
3529 if (!pkt_dev->entry) {
3530 pr_err("cannot create %s/%s procfs entry\n",
3531 PG_PROC_DIR, ifname);
3532 err = -EINVAL;
3533 goto out2;
3534 }
3535 #ifdef CONFIG_XFRM
3536 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3537 pkt_dev->ipsproto = IPPROTO_ESP;
3538 #endif
3539
3540 return add_dev_to_thread(t, pkt_dev);
3541 out2:
3542 dev_put(pkt_dev->odev);
3543 out1:
3544 #ifdef CONFIG_XFRM
3545 free_SAs(pkt_dev);
3546 #endif
3547 vfree(pkt_dev->flows);
3548 kfree(pkt_dev);
3549 return err;
3550 }
3551
3552 static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
3553 {
3554 struct pktgen_thread *t;
3555 struct proc_dir_entry *pe;
3556 struct task_struct *p;
3557
3558 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3559 cpu_to_node(cpu));
3560 if (!t) {
3561 pr_err("ERROR: out of memory, can't create new thread\n");
3562 return -ENOMEM;
3563 }
3564
3565 spin_lock_init(&t->if_lock);
3566 t->cpu = cpu;
3567
3568 INIT_LIST_HEAD(&t->if_list);
3569
3570 list_add_tail(&t->th_list, &pn->pktgen_threads);
3571 init_completion(&t->start_done);
3572
3573 p = kthread_create_on_node(pktgen_thread_worker,
3574 t,
3575 cpu_to_node(cpu),
3576 "kpktgend_%d", cpu);
3577 if (IS_ERR(p)) {
3578 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3579 list_del(&t->th_list);
3580 kfree(t);
3581 return PTR_ERR(p);
3582 }
3583 kthread_bind(p, cpu);
3584 t->tsk = p;
3585
3586 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
3587 &pktgen_thread_fops, t);
3588 if (!pe) {
3589 pr_err("cannot create %s/%s procfs entry\n",
3590 PG_PROC_DIR, t->tsk->comm);
3591 kthread_stop(p);
3592 list_del(&t->th_list);
3593 kfree(t);
3594 return -EINVAL;
3595 }
3596
3597 t->net = pn;
3598 wake_up_process(p);
3599 wait_for_completion(&t->start_done);
3600
3601 return 0;
3602 }
3603
3604 /*
3605 * Removes a device from the thread if_list.
3606 */
3607 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3608 struct pktgen_dev *pkt_dev)
3609 {
3610 struct list_head *q, *n;
3611 struct pktgen_dev *p;
3612
3613 list_for_each_safe(q, n, &t->if_list) {
3614 p = list_entry(q, struct pktgen_dev, list);
3615 if (p == pkt_dev)
3616 list_del(&p->list);
3617 }
3618 }
3619
3620 static int pktgen_remove_device(struct pktgen_thread *t,
3621 struct pktgen_dev *pkt_dev)
3622 {
3623 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3624
3625 if (pkt_dev->running) {
3626 pr_warning("WARNING: trying to remove a running interface, stopping it now\n");
3627 pktgen_stop_device(pkt_dev);
3628 }
3629
3630 /* Dis-associate from the interface */
3631
3632 if (pkt_dev->odev) {
3633 dev_put(pkt_dev->odev);
3634 pkt_dev->odev = NULL;
3635 }
3636
3637 /* And update the thread if_list */
3638
3639 _rem_dev_from_if_list(t, pkt_dev);
3640
3641 if (pkt_dev->entry)
3642 proc_remove(pkt_dev->entry);
3643
3644 #ifdef CONFIG_XFRM
3645 free_SAs(pkt_dev);
3646 #endif
3647 vfree(pkt_dev->flows);
3648 if (pkt_dev->page)
3649 put_page(pkt_dev->page);
3650 kfree(pkt_dev);
3651 return 0;
3652 }
3653
3654 static int __net_init pg_net_init(struct net *net)
3655 {
3656 struct pktgen_net *pn = net_generic(net, pg_net_id);
3657 struct proc_dir_entry *pe;
3658 int cpu, ret = 0;
3659
3660 pn->net = net;
3661 INIT_LIST_HEAD(&pn->pktgen_threads);
3662 pn->pktgen_exiting = false;
3663 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net);
3664 if (!pn->proc_dir) {
3665 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR);
3666 return -ENODEV;
3667 }
3668 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops);
3669 if (pe == NULL) {
3670 pr_err("cannot create %s procfs entry\n", PGCTRL);
3671 ret = -EINVAL;
3672 goto remove;
3673 }
3674
3675 for_each_online_cpu(cpu) {
3676 int err;
3677
3678 err = pktgen_create_thread(cpu, pn);
3679 if (err)
3680 pr_warn("Cannot create thread for cpu %d (%d)\n",
3681 cpu, err);
3682 }
3683
3684 if (list_empty(&pn->pktgen_threads)) {
3685 pr_err("Initialization failed for all threads\n");
3686 ret = -ENODEV;
3687 goto remove_entry;
3688 }
3689
3690 return 0;
3691
3692 remove_entry:
3693 remove_proc_entry(PGCTRL, pn->proc_dir);
3694 remove:
3695 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3696 return ret;
3697 }
3698
3699 static void __net_exit pg_net_exit(struct net *net)
3700 {
3701 struct pktgen_net *pn = net_generic(net, pg_net_id);
3702 struct pktgen_thread *t;
3703 struct list_head *q, *n;
3704 LIST_HEAD(list);
3705
3706 /* Stop all interfaces & threads */
3707 pn->pktgen_exiting = true;
3708
3709 mutex_lock(&pktgen_thread_lock);
3710 list_splice_init(&pn->pktgen_threads, &list);
3711 mutex_unlock(&pktgen_thread_lock);
3712
3713 list_for_each_safe(q, n, &list) {
3714 t = list_entry(q, struct pktgen_thread, th_list);
3715 list_del(&t->th_list);
3716 kthread_stop(t->tsk);
3717 kfree(t);
3718 }
3719
3720 remove_proc_entry(PGCTRL, pn->proc_dir);
3721 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3722 }
3723
3724 static struct pernet_operations pg_net_ops = {
3725 .init = pg_net_init,
3726 .exit = pg_net_exit,
3727 .id = &pg_net_id,
3728 .size = sizeof(struct pktgen_net),
3729 };
3730
3731 static int __init pg_init(void)
3732 {
3733 int ret = 0;
3734
3735 pr_info("%s", version);
3736 ret = register_pernet_subsys(&pg_net_ops);
3737 if (ret)
3738 return ret;
3739 ret = register_netdevice_notifier(&pktgen_notifier_block);
3740 if (ret)
3741 unregister_pernet_subsys(&pg_net_ops);
3742
3743 return ret;
3744 }
3745
3746 static void __exit pg_cleanup(void)
3747 {
3748 unregister_netdevice_notifier(&pktgen_notifier_block);
3749 unregister_pernet_subsys(&pg_net_ops);
3750 }
3751
3752 module_init(pg_init);
3753 module_exit(pg_cleanup);
3754
3755 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3756 MODULE_DESCRIPTION("Packet Generator tool");
3757 MODULE_LICENSE("GPL");
3758 MODULE_VERSION(VERSION);
3759 module_param(pg_count_d, int, 0);
3760 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3761 module_param(pg_delay_d, int, 0);
3762 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3763 module_param(pg_clone_skb_d, int, 0);
3764 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3765 module_param(debug, int, 0);
3766 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
Linux kernel - Deliverables
This page took 0.148583 seconds and 5 git commands to generate.