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{pktgen, xfrm} Using "pgset spi xxx" to spedifiy SA for a given flow
[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/ip6_checksum.h>
165 #include <net/addrconf.h>
166 #ifdef CONFIG_XFRM
167 #include <net/xfrm.h>
168 #endif
169 #include <net/netns/generic.h>
170 #include <asm/byteorder.h>
171 #include <linux/rcupdate.h>
172 #include <linux/bitops.h>
173 #include <linux/io.h>
174 #include <linux/timex.h>
175 #include <linux/uaccess.h>
176 #include <asm/dma.h>
177 #include <asm/div64.h> /* do_div */
178
179 #define VERSION "2.74"
180 #define IP_NAME_SZ 32
181 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
182 #define MPLS_STACK_BOTTOM htonl(0x00000100)
183
184 #define func_enter() pr_debug("entering %s\n", __func__);
185
186 /* Device flag bits */
187 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
188 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
189 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
190 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
191 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
192 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
193 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
194 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
195 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
196 #define F_VID_RND (1<<9) /* Random VLAN ID */
197 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
198 #define F_FLOW_SEQ (1<<11) /* Sequential flows */
199 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */
200 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
201 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
202 #define F_NODE (1<<15) /* Node memory alloc*/
203 #define F_UDPCSUM (1<<16) /* Include UDP checksum */
204
205 /* Thread control flag bits */
206 #define T_STOP (1<<0) /* Stop run */
207 #define T_RUN (1<<1) /* Start run */
208 #define T_REMDEVALL (1<<2) /* Remove all devs */
209 #define T_REMDEV (1<<3) /* Remove one dev */
210
211 /* If lock -- can be removed after some work */
212 #define if_lock(t) spin_lock(&(t->if_lock));
213 #define if_unlock(t) spin_unlock(&(t->if_lock));
214
215 /* Used to help with determining the pkts on receive */
216 #define PKTGEN_MAGIC 0xbe9be955
217 #define PG_PROC_DIR "pktgen"
218 #define PGCTRL "pgctrl"
219
220 #define MAX_CFLOWS 65536
221
222 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
223 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
224
225 struct flow_state {
226 __be32 cur_daddr;
227 int count;
228 #ifdef CONFIG_XFRM
229 struct xfrm_state *x;
230 #endif
231 __u32 flags;
232 };
233
234 /* flow flag bits */
235 #define F_INIT (1<<0) /* flow has been initialized */
236
237 struct pktgen_dev {
238 /*
239 * Try to keep frequent/infrequent used vars. separated.
240 */
241 struct proc_dir_entry *entry; /* proc file */
242 struct pktgen_thread *pg_thread;/* the owner */
243 struct list_head list; /* chaining in the thread's run-queue */
244
245 int running; /* if false, the test will stop */
246
247 /* If min != max, then we will either do a linear iteration, or
248 * we will do a random selection from within the range.
249 */
250 __u32 flags;
251 int removal_mark; /* non-zero => the device is marked for
252 * removal by worker thread */
253
254 int min_pkt_size;
255 int max_pkt_size;
256 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
257 int nfrags;
258 struct page *page;
259 u64 delay; /* nano-seconds */
260
261 __u64 count; /* Default No packets to send */
262 __u64 sofar; /* How many pkts we've sent so far */
263 __u64 tx_bytes; /* How many bytes we've transmitted */
264 __u64 errors; /* Errors when trying to transmit, */
265
266 /* runtime counters relating to clone_skb */
267
268 __u64 allocated_skbs;
269 __u32 clone_count;
270 int last_ok; /* Was last skb sent?
271 * Or a failed transmit of some sort?
272 * This will keep sequence numbers in order
273 */
274 ktime_t next_tx;
275 ktime_t started_at;
276 ktime_t stopped_at;
277 u64 idle_acc; /* nano-seconds */
278
279 __u32 seq_num;
280
281 int clone_skb; /*
282 * Use multiple SKBs during packet gen.
283 * If this number is greater than 1, then
284 * that many copies of the same packet will be
285 * sent before a new packet is allocated.
286 * If you want to send 1024 identical packets
287 * before creating a new packet,
288 * set clone_skb to 1024.
289 */
290
291 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
292 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
293 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
294 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
295
296 struct in6_addr in6_saddr;
297 struct in6_addr in6_daddr;
298 struct in6_addr cur_in6_daddr;
299 struct in6_addr cur_in6_saddr;
300 /* For ranges */
301 struct in6_addr min_in6_daddr;
302 struct in6_addr max_in6_daddr;
303 struct in6_addr min_in6_saddr;
304 struct in6_addr max_in6_saddr;
305
306 /* If we're doing ranges, random or incremental, then this
307 * defines the min/max for those ranges.
308 */
309 __be32 saddr_min; /* inclusive, source IP address */
310 __be32 saddr_max; /* exclusive, source IP address */
311 __be32 daddr_min; /* inclusive, dest IP address */
312 __be32 daddr_max; /* exclusive, dest IP address */
313
314 __u16 udp_src_min; /* inclusive, source UDP port */
315 __u16 udp_src_max; /* exclusive, source UDP port */
316 __u16 udp_dst_min; /* inclusive, dest UDP port */
317 __u16 udp_dst_max; /* exclusive, dest UDP port */
318
319 /* DSCP + ECN */
320 __u8 tos; /* six MSB of (former) IPv4 TOS
321 are for dscp codepoint */
322 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
323 (see RFC 3260, sec. 4) */
324
325 /* MPLS */
326 unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */
327 __be32 labels[MAX_MPLS_LABELS];
328
329 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
330 __u8 vlan_p;
331 __u8 vlan_cfi;
332 __u16 vlan_id; /* 0xffff means no vlan tag */
333
334 __u8 svlan_p;
335 __u8 svlan_cfi;
336 __u16 svlan_id; /* 0xffff means no svlan tag */
337
338 __u32 src_mac_count; /* How many MACs to iterate through */
339 __u32 dst_mac_count; /* How many MACs to iterate through */
340
341 unsigned char dst_mac[ETH_ALEN];
342 unsigned char src_mac[ETH_ALEN];
343
344 __u32 cur_dst_mac_offset;
345 __u32 cur_src_mac_offset;
346 __be32 cur_saddr;
347 __be32 cur_daddr;
348 __u16 ip_id;
349 __u16 cur_udp_dst;
350 __u16 cur_udp_src;
351 __u16 cur_queue_map;
352 __u32 cur_pkt_size;
353 __u32 last_pkt_size;
354
355 __u8 hh[14];
356 /* = {
357 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
358
359 We fill in SRC address later
360 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
361 0x08, 0x00
362 };
363 */
364 __u16 pad; /* pad out the hh struct to an even 16 bytes */
365
366 struct sk_buff *skb; /* skb we are to transmit next, used for when we
367 * are transmitting the same one multiple times
368 */
369 struct net_device *odev; /* The out-going device.
370 * Note that the device should have it's
371 * pg_info pointer pointing back to this
372 * device.
373 * Set when the user specifies the out-going
374 * device name (not when the inject is
375 * started as it used to do.)
376 */
377 char odevname[32];
378 struct flow_state *flows;
379 unsigned int cflows; /* Concurrent flows (config) */
380 unsigned int lflow; /* Flow length (config) */
381 unsigned int nflows; /* accumulated flows (stats) */
382 unsigned int curfl; /* current sequenced flow (state)*/
383
384 u16 queue_map_min;
385 u16 queue_map_max;
386 __u32 skb_priority; /* skb priority field */
387 int node; /* Memory node */
388
389 #ifdef CONFIG_XFRM
390 __u8 ipsmode; /* IPSEC mode (config) */
391 __u8 ipsproto; /* IPSEC type (config) */
392 __u32 spi;
393 #endif
394 char result[512];
395 };
396
397 struct pktgen_hdr {
398 __be32 pgh_magic;
399 __be32 seq_num;
400 __be32 tv_sec;
401 __be32 tv_usec;
402 };
403
404
405 static int pg_net_id __read_mostly;
406
407 struct pktgen_net {
408 struct net *net;
409 struct proc_dir_entry *proc_dir;
410 struct list_head pktgen_threads;
411 bool pktgen_exiting;
412 };
413
414 struct pktgen_thread {
415 spinlock_t if_lock; /* for list of devices */
416 struct list_head if_list; /* All device here */
417 struct list_head th_list;
418 struct task_struct *tsk;
419 char result[512];
420
421 /* Field for thread to receive "posted" events terminate,
422 stop ifs etc. */
423
424 u32 control;
425 int cpu;
426
427 wait_queue_head_t queue;
428 struct completion start_done;
429 struct pktgen_net *net;
430 };
431
432 #define REMOVE 1
433 #define FIND 0
434
435 static const char version[] =
436 "Packet Generator for packet performance testing. "
437 "Version: " VERSION "\n";
438
439 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
440 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
441 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
442 const char *ifname, bool exact);
443 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
444 static void pktgen_run_all_threads(struct pktgen_net *pn);
445 static void pktgen_reset_all_threads(struct pktgen_net *pn);
446 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn);
447
448 static void pktgen_stop(struct pktgen_thread *t);
449 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
450
451 /* Module parameters, defaults. */
452 static int pg_count_d __read_mostly = 1000;
453 static int pg_delay_d __read_mostly;
454 static int pg_clone_skb_d __read_mostly;
455 static int debug __read_mostly;
456
457 static DEFINE_MUTEX(pktgen_thread_lock);
458
459 static struct notifier_block pktgen_notifier_block = {
460 .notifier_call = pktgen_device_event,
461 };
462
463 /*
464 * /proc handling functions
465 *
466 */
467
468 static int pgctrl_show(struct seq_file *seq, void *v)
469 {
470 seq_puts(seq, version);
471 return 0;
472 }
473
474 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
475 size_t count, loff_t *ppos)
476 {
477 int err = 0;
478 char data[128];
479 struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
480
481 if (!capable(CAP_NET_ADMIN)) {
482 err = -EPERM;
483 goto out;
484 }
485
486 if (count > sizeof(data))
487 count = sizeof(data);
488
489 if (copy_from_user(data, buf, count)) {
490 err = -EFAULT;
491 goto out;
492 }
493 data[count - 1] = 0; /* Make string */
494
495 if (!strcmp(data, "stop"))
496 pktgen_stop_all_threads_ifs(pn);
497
498 else if (!strcmp(data, "start"))
499 pktgen_run_all_threads(pn);
500
501 else if (!strcmp(data, "reset"))
502 pktgen_reset_all_threads(pn);
503
504 else
505 pr_warning("Unknown command: %s\n", data);
506
507 err = count;
508
509 out:
510 return err;
511 }
512
513 static int pgctrl_open(struct inode *inode, struct file *file)
514 {
515 return single_open(file, pgctrl_show, PDE_DATA(inode));
516 }
517
518 static const struct file_operations pktgen_fops = {
519 .owner = THIS_MODULE,
520 .open = pgctrl_open,
521 .read = seq_read,
522 .llseek = seq_lseek,
523 .write = pgctrl_write,
524 .release = single_release,
525 };
526
527 static int pktgen_if_show(struct seq_file *seq, void *v)
528 {
529 const struct pktgen_dev *pkt_dev = seq->private;
530 ktime_t stopped;
531 u64 idle;
532
533 seq_printf(seq,
534 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
535 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
536 pkt_dev->max_pkt_size);
537
538 seq_printf(seq,
539 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
540 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
541 pkt_dev->clone_skb, pkt_dev->odevname);
542
543 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
544 pkt_dev->lflow);
545
546 seq_printf(seq,
547 " queue_map_min: %u queue_map_max: %u\n",
548 pkt_dev->queue_map_min,
549 pkt_dev->queue_map_max);
550
551 if (pkt_dev->skb_priority)
552 seq_printf(seq, " skb_priority: %u\n",
553 pkt_dev->skb_priority);
554
555 if (pkt_dev->flags & F_IPV6) {
556 seq_printf(seq,
557 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
558 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
559 &pkt_dev->in6_saddr,
560 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
561 &pkt_dev->in6_daddr,
562 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
563 } else {
564 seq_printf(seq,
565 " dst_min: %s dst_max: %s\n",
566 pkt_dev->dst_min, pkt_dev->dst_max);
567 seq_printf(seq,
568 " src_min: %s src_max: %s\n",
569 pkt_dev->src_min, pkt_dev->src_max);
570 }
571
572 seq_puts(seq, " src_mac: ");
573
574 seq_printf(seq, "%pM ",
575 is_zero_ether_addr(pkt_dev->src_mac) ?
576 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
577
578 seq_printf(seq, "dst_mac: ");
579 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
580
581 seq_printf(seq,
582 " udp_src_min: %d udp_src_max: %d"
583 " udp_dst_min: %d udp_dst_max: %d\n",
584 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
585 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
586
587 seq_printf(seq,
588 " src_mac_count: %d dst_mac_count: %d\n",
589 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
590
591 if (pkt_dev->nr_labels) {
592 unsigned int i;
593 seq_printf(seq, " mpls: ");
594 for (i = 0; i < pkt_dev->nr_labels; i++)
595 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
596 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
597 }
598
599 if (pkt_dev->vlan_id != 0xffff)
600 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
601 pkt_dev->vlan_id, pkt_dev->vlan_p,
602 pkt_dev->vlan_cfi);
603
604 if (pkt_dev->svlan_id != 0xffff)
605 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
606 pkt_dev->svlan_id, pkt_dev->svlan_p,
607 pkt_dev->svlan_cfi);
608
609 if (pkt_dev->tos)
610 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
611
612 if (pkt_dev->traffic_class)
613 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
614
615 if (pkt_dev->node >= 0)
616 seq_printf(seq, " node: %d\n", pkt_dev->node);
617
618 seq_printf(seq, " Flags: ");
619
620 if (pkt_dev->flags & F_IPV6)
621 seq_printf(seq, "IPV6 ");
622
623 if (pkt_dev->flags & F_IPSRC_RND)
624 seq_printf(seq, "IPSRC_RND ");
625
626 if (pkt_dev->flags & F_IPDST_RND)
627 seq_printf(seq, "IPDST_RND ");
628
629 if (pkt_dev->flags & F_TXSIZE_RND)
630 seq_printf(seq, "TXSIZE_RND ");
631
632 if (pkt_dev->flags & F_UDPSRC_RND)
633 seq_printf(seq, "UDPSRC_RND ");
634
635 if (pkt_dev->flags & F_UDPDST_RND)
636 seq_printf(seq, "UDPDST_RND ");
637
638 if (pkt_dev->flags & F_UDPCSUM)
639 seq_printf(seq, "UDPCSUM ");
640
641 if (pkt_dev->flags & F_MPLS_RND)
642 seq_printf(seq, "MPLS_RND ");
643
644 if (pkt_dev->flags & F_QUEUE_MAP_RND)
645 seq_printf(seq, "QUEUE_MAP_RND ");
646
647 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
648 seq_printf(seq, "QUEUE_MAP_CPU ");
649
650 if (pkt_dev->cflows) {
651 if (pkt_dev->flags & F_FLOW_SEQ)
652 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
653 else
654 seq_printf(seq, "FLOW_RND ");
655 }
656
657 #ifdef CONFIG_XFRM
658 if (pkt_dev->flags & F_IPSEC_ON)
659 seq_printf(seq, "IPSEC ");
660 #endif
661
662 if (pkt_dev->flags & F_MACSRC_RND)
663 seq_printf(seq, "MACSRC_RND ");
664
665 if (pkt_dev->flags & F_MACDST_RND)
666 seq_printf(seq, "MACDST_RND ");
667
668 if (pkt_dev->flags & F_VID_RND)
669 seq_printf(seq, "VID_RND ");
670
671 if (pkt_dev->flags & F_SVID_RND)
672 seq_printf(seq, "SVID_RND ");
673
674 if (pkt_dev->flags & F_NODE)
675 seq_printf(seq, "NODE_ALLOC ");
676
677 seq_puts(seq, "\n");
678
679 /* not really stopped, more like last-running-at */
680 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at;
681 idle = pkt_dev->idle_acc;
682 do_div(idle, NSEC_PER_USEC);
683
684 seq_printf(seq,
685 "Current:\n pkts-sofar: %llu errors: %llu\n",
686 (unsigned long long)pkt_dev->sofar,
687 (unsigned long long)pkt_dev->errors);
688
689 seq_printf(seq,
690 " started: %lluus stopped: %lluus idle: %lluus\n",
691 (unsigned long long) ktime_to_us(pkt_dev->started_at),
692 (unsigned long long) ktime_to_us(stopped),
693 (unsigned long long) idle);
694
695 seq_printf(seq,
696 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
697 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
698 pkt_dev->cur_src_mac_offset);
699
700 if (pkt_dev->flags & F_IPV6) {
701 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
702 &pkt_dev->cur_in6_saddr,
703 &pkt_dev->cur_in6_daddr);
704 } else
705 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n",
706 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
707
708 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
709 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
710
711 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
712
713 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
714
715 if (pkt_dev->result[0])
716 seq_printf(seq, "Result: %s\n", pkt_dev->result);
717 else
718 seq_printf(seq, "Result: Idle\n");
719
720 return 0;
721 }
722
723
724 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
725 __u32 *num)
726 {
727 int i = 0;
728 *num = 0;
729
730 for (; i < maxlen; i++) {
731 int value;
732 char c;
733 *num <<= 4;
734 if (get_user(c, &user_buffer[i]))
735 return -EFAULT;
736 value = hex_to_bin(c);
737 if (value >= 0)
738 *num |= value;
739 else
740 break;
741 }
742 return i;
743 }
744
745 static int count_trail_chars(const char __user * user_buffer,
746 unsigned int maxlen)
747 {
748 int i;
749
750 for (i = 0; i < maxlen; i++) {
751 char c;
752 if (get_user(c, &user_buffer[i]))
753 return -EFAULT;
754 switch (c) {
755 case '\"':
756 case '\n':
757 case '\r':
758 case '\t':
759 case ' ':
760 case '=':
761 break;
762 default:
763 goto done;
764 }
765 }
766 done:
767 return i;
768 }
769
770 static long num_arg(const char __user *user_buffer, unsigned long maxlen,
771 unsigned long *num)
772 {
773 int i;
774 *num = 0;
775
776 for (i = 0; i < maxlen; i++) {
777 char c;
778 if (get_user(c, &user_buffer[i]))
779 return -EFAULT;
780 if ((c >= '0') && (c <= '9')) {
781 *num *= 10;
782 *num += c - '0';
783 } else
784 break;
785 }
786 return i;
787 }
788
789 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
790 {
791 int i;
792
793 for (i = 0; i < maxlen; i++) {
794 char c;
795 if (get_user(c, &user_buffer[i]))
796 return -EFAULT;
797 switch (c) {
798 case '\"':
799 case '\n':
800 case '\r':
801 case '\t':
802 case ' ':
803 goto done_str;
804 break;
805 default:
806 break;
807 }
808 }
809 done_str:
810 return i;
811 }
812
813 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
814 {
815 unsigned int n = 0;
816 char c;
817 ssize_t i = 0;
818 int len;
819
820 pkt_dev->nr_labels = 0;
821 do {
822 __u32 tmp;
823 len = hex32_arg(&buffer[i], 8, &tmp);
824 if (len <= 0)
825 return len;
826 pkt_dev->labels[n] = htonl(tmp);
827 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
828 pkt_dev->flags |= F_MPLS_RND;
829 i += len;
830 if (get_user(c, &buffer[i]))
831 return -EFAULT;
832 i++;
833 n++;
834 if (n >= MAX_MPLS_LABELS)
835 return -E2BIG;
836 } while (c == ',');
837
838 pkt_dev->nr_labels = n;
839 return i;
840 }
841
842 static ssize_t pktgen_if_write(struct file *file,
843 const char __user * user_buffer, size_t count,
844 loff_t * offset)
845 {
846 struct seq_file *seq = file->private_data;
847 struct pktgen_dev *pkt_dev = seq->private;
848 int i, max, len;
849 char name[16], valstr[32];
850 unsigned long value = 0;
851 char *pg_result = NULL;
852 int tmp = 0;
853 char buf[128];
854
855 pg_result = &(pkt_dev->result[0]);
856
857 if (count < 1) {
858 pr_warning("wrong command format\n");
859 return -EINVAL;
860 }
861
862 max = count;
863 tmp = count_trail_chars(user_buffer, max);
864 if (tmp < 0) {
865 pr_warning("illegal format\n");
866 return tmp;
867 }
868 i = tmp;
869
870 /* Read variable name */
871
872 len = strn_len(&user_buffer[i], sizeof(name) - 1);
873 if (len < 0)
874 return len;
875
876 memset(name, 0, sizeof(name));
877 if (copy_from_user(name, &user_buffer[i], len))
878 return -EFAULT;
879 i += len;
880
881 max = count - i;
882 len = count_trail_chars(&user_buffer[i], max);
883 if (len < 0)
884 return len;
885
886 i += len;
887
888 if (debug) {
889 size_t copy = min_t(size_t, count, 1023);
890 char tb[copy + 1];
891 if (copy_from_user(tb, user_buffer, copy))
892 return -EFAULT;
893 tb[copy] = 0;
894 pr_debug("%s,%lu buffer -:%s:-\n",
895 name, (unsigned long)count, tb);
896 }
897
898 if (!strcmp(name, "min_pkt_size")) {
899 len = num_arg(&user_buffer[i], 10, &value);
900 if (len < 0)
901 return len;
902
903 i += len;
904 if (value < 14 + 20 + 8)
905 value = 14 + 20 + 8;
906 if (value != pkt_dev->min_pkt_size) {
907 pkt_dev->min_pkt_size = value;
908 pkt_dev->cur_pkt_size = value;
909 }
910 sprintf(pg_result, "OK: min_pkt_size=%u",
911 pkt_dev->min_pkt_size);
912 return count;
913 }
914
915 if (!strcmp(name, "max_pkt_size")) {
916 len = num_arg(&user_buffer[i], 10, &value);
917 if (len < 0)
918 return len;
919
920 i += len;
921 if (value < 14 + 20 + 8)
922 value = 14 + 20 + 8;
923 if (value != pkt_dev->max_pkt_size) {
924 pkt_dev->max_pkt_size = value;
925 pkt_dev->cur_pkt_size = value;
926 }
927 sprintf(pg_result, "OK: max_pkt_size=%u",
928 pkt_dev->max_pkt_size);
929 return count;
930 }
931
932 /* Shortcut for min = max */
933
934 if (!strcmp(name, "pkt_size")) {
935 len = num_arg(&user_buffer[i], 10, &value);
936 if (len < 0)
937 return len;
938
939 i += len;
940 if (value < 14 + 20 + 8)
941 value = 14 + 20 + 8;
942 if (value != pkt_dev->min_pkt_size) {
943 pkt_dev->min_pkt_size = value;
944 pkt_dev->max_pkt_size = value;
945 pkt_dev->cur_pkt_size = value;
946 }
947 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
948 return count;
949 }
950
951 if (!strcmp(name, "debug")) {
952 len = num_arg(&user_buffer[i], 10, &value);
953 if (len < 0)
954 return len;
955
956 i += len;
957 debug = value;
958 sprintf(pg_result, "OK: debug=%u", debug);
959 return count;
960 }
961
962 if (!strcmp(name, "frags")) {
963 len = num_arg(&user_buffer[i], 10, &value);
964 if (len < 0)
965 return len;
966
967 i += len;
968 pkt_dev->nfrags = value;
969 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
970 return count;
971 }
972 if (!strcmp(name, "delay")) {
973 len = num_arg(&user_buffer[i], 10, &value);
974 if (len < 0)
975 return len;
976
977 i += len;
978 if (value == 0x7FFFFFFF)
979 pkt_dev->delay = ULLONG_MAX;
980 else
981 pkt_dev->delay = (u64)value;
982
983 sprintf(pg_result, "OK: delay=%llu",
984 (unsigned long long) pkt_dev->delay);
985 return count;
986 }
987 if (!strcmp(name, "rate")) {
988 len = num_arg(&user_buffer[i], 10, &value);
989 if (len < 0)
990 return len;
991
992 i += len;
993 if (!value)
994 return len;
995 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
996 if (debug)
997 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
998
999 sprintf(pg_result, "OK: rate=%lu", value);
1000 return count;
1001 }
1002 if (!strcmp(name, "ratep")) {
1003 len = num_arg(&user_buffer[i], 10, &value);
1004 if (len < 0)
1005 return len;
1006
1007 i += len;
1008 if (!value)
1009 return len;
1010 pkt_dev->delay = NSEC_PER_SEC/value;
1011 if (debug)
1012 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1013
1014 sprintf(pg_result, "OK: rate=%lu", value);
1015 return count;
1016 }
1017 if (!strcmp(name, "udp_src_min")) {
1018 len = num_arg(&user_buffer[i], 10, &value);
1019 if (len < 0)
1020 return len;
1021
1022 i += len;
1023 if (value != pkt_dev->udp_src_min) {
1024 pkt_dev->udp_src_min = value;
1025 pkt_dev->cur_udp_src = value;
1026 }
1027 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1028 return count;
1029 }
1030 if (!strcmp(name, "udp_dst_min")) {
1031 len = num_arg(&user_buffer[i], 10, &value);
1032 if (len < 0)
1033 return len;
1034
1035 i += len;
1036 if (value != pkt_dev->udp_dst_min) {
1037 pkt_dev->udp_dst_min = value;
1038 pkt_dev->cur_udp_dst = value;
1039 }
1040 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1041 return count;
1042 }
1043 if (!strcmp(name, "udp_src_max")) {
1044 len = num_arg(&user_buffer[i], 10, &value);
1045 if (len < 0)
1046 return len;
1047
1048 i += len;
1049 if (value != pkt_dev->udp_src_max) {
1050 pkt_dev->udp_src_max = value;
1051 pkt_dev->cur_udp_src = value;
1052 }
1053 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1054 return count;
1055 }
1056 if (!strcmp(name, "udp_dst_max")) {
1057 len = num_arg(&user_buffer[i], 10, &value);
1058 if (len < 0)
1059 return len;
1060
1061 i += len;
1062 if (value != pkt_dev->udp_dst_max) {
1063 pkt_dev->udp_dst_max = value;
1064 pkt_dev->cur_udp_dst = value;
1065 }
1066 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1067 return count;
1068 }
1069 if (!strcmp(name, "clone_skb")) {
1070 len = num_arg(&user_buffer[i], 10, &value);
1071 if (len < 0)
1072 return len;
1073 if ((value > 0) &&
1074 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1075 return -ENOTSUPP;
1076 i += len;
1077 pkt_dev->clone_skb = value;
1078
1079 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1080 return count;
1081 }
1082 if (!strcmp(name, "count")) {
1083 len = num_arg(&user_buffer[i], 10, &value);
1084 if (len < 0)
1085 return len;
1086
1087 i += len;
1088 pkt_dev->count = value;
1089 sprintf(pg_result, "OK: count=%llu",
1090 (unsigned long long)pkt_dev->count);
1091 return count;
1092 }
1093 if (!strcmp(name, "src_mac_count")) {
1094 len = num_arg(&user_buffer[i], 10, &value);
1095 if (len < 0)
1096 return len;
1097
1098 i += len;
1099 if (pkt_dev->src_mac_count != value) {
1100 pkt_dev->src_mac_count = value;
1101 pkt_dev->cur_src_mac_offset = 0;
1102 }
1103 sprintf(pg_result, "OK: src_mac_count=%d",
1104 pkt_dev->src_mac_count);
1105 return count;
1106 }
1107 if (!strcmp(name, "dst_mac_count")) {
1108 len = num_arg(&user_buffer[i], 10, &value);
1109 if (len < 0)
1110 return len;
1111
1112 i += len;
1113 if (pkt_dev->dst_mac_count != value) {
1114 pkt_dev->dst_mac_count = value;
1115 pkt_dev->cur_dst_mac_offset = 0;
1116 }
1117 sprintf(pg_result, "OK: dst_mac_count=%d",
1118 pkt_dev->dst_mac_count);
1119 return count;
1120 }
1121 if (!strcmp(name, "node")) {
1122 len = num_arg(&user_buffer[i], 10, &value);
1123 if (len < 0)
1124 return len;
1125
1126 i += len;
1127
1128 if (node_possible(value)) {
1129 pkt_dev->node = value;
1130 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1131 if (pkt_dev->page) {
1132 put_page(pkt_dev->page);
1133 pkt_dev->page = NULL;
1134 }
1135 }
1136 else
1137 sprintf(pg_result, "ERROR: node not possible");
1138 return count;
1139 }
1140 if (!strcmp(name, "flag")) {
1141 char f[32];
1142 memset(f, 0, 32);
1143 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1144 if (len < 0)
1145 return len;
1146
1147 if (copy_from_user(f, &user_buffer[i], len))
1148 return -EFAULT;
1149 i += len;
1150 if (strcmp(f, "IPSRC_RND") == 0)
1151 pkt_dev->flags |= F_IPSRC_RND;
1152
1153 else if (strcmp(f, "!IPSRC_RND") == 0)
1154 pkt_dev->flags &= ~F_IPSRC_RND;
1155
1156 else if (strcmp(f, "TXSIZE_RND") == 0)
1157 pkt_dev->flags |= F_TXSIZE_RND;
1158
1159 else if (strcmp(f, "!TXSIZE_RND") == 0)
1160 pkt_dev->flags &= ~F_TXSIZE_RND;
1161
1162 else if (strcmp(f, "IPDST_RND") == 0)
1163 pkt_dev->flags |= F_IPDST_RND;
1164
1165 else if (strcmp(f, "!IPDST_RND") == 0)
1166 pkt_dev->flags &= ~F_IPDST_RND;
1167
1168 else if (strcmp(f, "UDPSRC_RND") == 0)
1169 pkt_dev->flags |= F_UDPSRC_RND;
1170
1171 else if (strcmp(f, "!UDPSRC_RND") == 0)
1172 pkt_dev->flags &= ~F_UDPSRC_RND;
1173
1174 else if (strcmp(f, "UDPDST_RND") == 0)
1175 pkt_dev->flags |= F_UDPDST_RND;
1176
1177 else if (strcmp(f, "!UDPDST_RND") == 0)
1178 pkt_dev->flags &= ~F_UDPDST_RND;
1179
1180 else if (strcmp(f, "MACSRC_RND") == 0)
1181 pkt_dev->flags |= F_MACSRC_RND;
1182
1183 else if (strcmp(f, "!MACSRC_RND") == 0)
1184 pkt_dev->flags &= ~F_MACSRC_RND;
1185
1186 else if (strcmp(f, "MACDST_RND") == 0)
1187 pkt_dev->flags |= F_MACDST_RND;
1188
1189 else if (strcmp(f, "!MACDST_RND") == 0)
1190 pkt_dev->flags &= ~F_MACDST_RND;
1191
1192 else if (strcmp(f, "MPLS_RND") == 0)
1193 pkt_dev->flags |= F_MPLS_RND;
1194
1195 else if (strcmp(f, "!MPLS_RND") == 0)
1196 pkt_dev->flags &= ~F_MPLS_RND;
1197
1198 else if (strcmp(f, "VID_RND") == 0)
1199 pkt_dev->flags |= F_VID_RND;
1200
1201 else if (strcmp(f, "!VID_RND") == 0)
1202 pkt_dev->flags &= ~F_VID_RND;
1203
1204 else if (strcmp(f, "SVID_RND") == 0)
1205 pkt_dev->flags |= F_SVID_RND;
1206
1207 else if (strcmp(f, "!SVID_RND") == 0)
1208 pkt_dev->flags &= ~F_SVID_RND;
1209
1210 else if (strcmp(f, "FLOW_SEQ") == 0)
1211 pkt_dev->flags |= F_FLOW_SEQ;
1212
1213 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1214 pkt_dev->flags |= F_QUEUE_MAP_RND;
1215
1216 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1217 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1218
1219 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1220 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1221
1222 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1223 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1224 #ifdef CONFIG_XFRM
1225 else if (strcmp(f, "IPSEC") == 0)
1226 pkt_dev->flags |= F_IPSEC_ON;
1227 #endif
1228
1229 else if (strcmp(f, "!IPV6") == 0)
1230 pkt_dev->flags &= ~F_IPV6;
1231
1232 else if (strcmp(f, "NODE_ALLOC") == 0)
1233 pkt_dev->flags |= F_NODE;
1234
1235 else if (strcmp(f, "!NODE_ALLOC") == 0)
1236 pkt_dev->flags &= ~F_NODE;
1237
1238 else if (strcmp(f, "UDPCSUM") == 0)
1239 pkt_dev->flags |= F_UDPCSUM;
1240
1241 else if (strcmp(f, "!UDPCSUM") == 0)
1242 pkt_dev->flags &= ~F_UDPCSUM;
1243
1244 else {
1245 sprintf(pg_result,
1246 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1247 f,
1248 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1249 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n");
1250 return count;
1251 }
1252 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1253 return count;
1254 }
1255 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1256 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1257 if (len < 0)
1258 return len;
1259
1260 if (copy_from_user(buf, &user_buffer[i], len))
1261 return -EFAULT;
1262 buf[len] = 0;
1263 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1264 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1265 strncpy(pkt_dev->dst_min, buf, len);
1266 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1267 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1268 }
1269 if (debug)
1270 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
1271 i += len;
1272 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1273 return count;
1274 }
1275 if (!strcmp(name, "dst_max")) {
1276 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1277 if (len < 0)
1278 return len;
1279
1280
1281 if (copy_from_user(buf, &user_buffer[i], len))
1282 return -EFAULT;
1283
1284 buf[len] = 0;
1285 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1286 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1287 strncpy(pkt_dev->dst_max, buf, len);
1288 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1289 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1290 }
1291 if (debug)
1292 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
1293 i += len;
1294 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1295 return count;
1296 }
1297 if (!strcmp(name, "dst6")) {
1298 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1299 if (len < 0)
1300 return len;
1301
1302 pkt_dev->flags |= F_IPV6;
1303
1304 if (copy_from_user(buf, &user_buffer[i], len))
1305 return -EFAULT;
1306 buf[len] = 0;
1307
1308 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
1309 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1310
1311 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1312
1313 if (debug)
1314 pr_debug("dst6 set to: %s\n", buf);
1315
1316 i += len;
1317 sprintf(pg_result, "OK: dst6=%s", buf);
1318 return count;
1319 }
1320 if (!strcmp(name, "dst6_min")) {
1321 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1322 if (len < 0)
1323 return len;
1324
1325 pkt_dev->flags |= F_IPV6;
1326
1327 if (copy_from_user(buf, &user_buffer[i], len))
1328 return -EFAULT;
1329 buf[len] = 0;
1330
1331 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
1332 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1333
1334 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
1335 if (debug)
1336 pr_debug("dst6_min set to: %s\n", buf);
1337
1338 i += len;
1339 sprintf(pg_result, "OK: dst6_min=%s", buf);
1340 return count;
1341 }
1342 if (!strcmp(name, "dst6_max")) {
1343 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1344 if (len < 0)
1345 return len;
1346
1347 pkt_dev->flags |= F_IPV6;
1348
1349 if (copy_from_user(buf, &user_buffer[i], len))
1350 return -EFAULT;
1351 buf[len] = 0;
1352
1353 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
1354 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1355
1356 if (debug)
1357 pr_debug("dst6_max set to: %s\n", buf);
1358
1359 i += len;
1360 sprintf(pg_result, "OK: dst6_max=%s", buf);
1361 return count;
1362 }
1363 if (!strcmp(name, "src6")) {
1364 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1365 if (len < 0)
1366 return len;
1367
1368 pkt_dev->flags |= F_IPV6;
1369
1370 if (copy_from_user(buf, &user_buffer[i], len))
1371 return -EFAULT;
1372 buf[len] = 0;
1373
1374 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
1375 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1376
1377 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1378
1379 if (debug)
1380 pr_debug("src6 set to: %s\n", buf);
1381
1382 i += len;
1383 sprintf(pg_result, "OK: src6=%s", buf);
1384 return count;
1385 }
1386 if (!strcmp(name, "src_min")) {
1387 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1388 if (len < 0)
1389 return len;
1390
1391 if (copy_from_user(buf, &user_buffer[i], len))
1392 return -EFAULT;
1393 buf[len] = 0;
1394 if (strcmp(buf, pkt_dev->src_min) != 0) {
1395 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1396 strncpy(pkt_dev->src_min, buf, len);
1397 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1398 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1399 }
1400 if (debug)
1401 pr_debug("src_min set to: %s\n", pkt_dev->src_min);
1402 i += len;
1403 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1404 return count;
1405 }
1406 if (!strcmp(name, "src_max")) {
1407 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1408 if (len < 0)
1409 return len;
1410
1411 if (copy_from_user(buf, &user_buffer[i], len))
1412 return -EFAULT;
1413 buf[len] = 0;
1414 if (strcmp(buf, pkt_dev->src_max) != 0) {
1415 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1416 strncpy(pkt_dev->src_max, buf, len);
1417 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1418 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1419 }
1420 if (debug)
1421 pr_debug("src_max set to: %s\n", pkt_dev->src_max);
1422 i += len;
1423 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1424 return count;
1425 }
1426 if (!strcmp(name, "dst_mac")) {
1427 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1428 if (len < 0)
1429 return len;
1430
1431 memset(valstr, 0, sizeof(valstr));
1432 if (copy_from_user(valstr, &user_buffer[i], len))
1433 return -EFAULT;
1434
1435 if (!mac_pton(valstr, pkt_dev->dst_mac))
1436 return -EINVAL;
1437 /* Set up Dest MAC */
1438 memcpy(&pkt_dev->hh[0], pkt_dev->dst_mac, ETH_ALEN);
1439
1440 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1441 return count;
1442 }
1443 if (!strcmp(name, "src_mac")) {
1444 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1445 if (len < 0)
1446 return len;
1447
1448 memset(valstr, 0, sizeof(valstr));
1449 if (copy_from_user(valstr, &user_buffer[i], len))
1450 return -EFAULT;
1451
1452 if (!mac_pton(valstr, pkt_dev->src_mac))
1453 return -EINVAL;
1454 /* Set up Src MAC */
1455 memcpy(&pkt_dev->hh[6], pkt_dev->src_mac, ETH_ALEN);
1456
1457 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1458 return count;
1459 }
1460
1461 if (!strcmp(name, "clear_counters")) {
1462 pktgen_clear_counters(pkt_dev);
1463 sprintf(pg_result, "OK: Clearing counters.\n");
1464 return count;
1465 }
1466
1467 if (!strcmp(name, "flows")) {
1468 len = num_arg(&user_buffer[i], 10, &value);
1469 if (len < 0)
1470 return len;
1471
1472 i += len;
1473 if (value > MAX_CFLOWS)
1474 value = MAX_CFLOWS;
1475
1476 pkt_dev->cflows = value;
1477 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1478 return count;
1479 }
1480
1481 if (!strcmp(name, "spi")) {
1482 len = num_arg(&user_buffer[i], 10, &value);
1483 if (len < 0)
1484 return len;
1485
1486 i += len;
1487 pkt_dev->spi = value;
1488 sprintf(pg_result, "OK: spi=%u", pkt_dev->spi);
1489 return count;
1490 }
1491
1492 if (!strcmp(name, "flowlen")) {
1493 len = num_arg(&user_buffer[i], 10, &value);
1494 if (len < 0)
1495 return len;
1496
1497 i += len;
1498 pkt_dev->lflow = value;
1499 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1500 return count;
1501 }
1502
1503 if (!strcmp(name, "queue_map_min")) {
1504 len = num_arg(&user_buffer[i], 5, &value);
1505 if (len < 0)
1506 return len;
1507
1508 i += len;
1509 pkt_dev->queue_map_min = value;
1510 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1511 return count;
1512 }
1513
1514 if (!strcmp(name, "queue_map_max")) {
1515 len = num_arg(&user_buffer[i], 5, &value);
1516 if (len < 0)
1517 return len;
1518
1519 i += len;
1520 pkt_dev->queue_map_max = value;
1521 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1522 return count;
1523 }
1524
1525 if (!strcmp(name, "mpls")) {
1526 unsigned int n, cnt;
1527
1528 len = get_labels(&user_buffer[i], pkt_dev);
1529 if (len < 0)
1530 return len;
1531 i += len;
1532 cnt = sprintf(pg_result, "OK: mpls=");
1533 for (n = 0; n < pkt_dev->nr_labels; n++)
1534 cnt += sprintf(pg_result + cnt,
1535 "%08x%s", ntohl(pkt_dev->labels[n]),
1536 n == pkt_dev->nr_labels-1 ? "" : ",");
1537
1538 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1539 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1540 pkt_dev->svlan_id = 0xffff;
1541
1542 if (debug)
1543 pr_debug("VLAN/SVLAN auto turned off\n");
1544 }
1545 return count;
1546 }
1547
1548 if (!strcmp(name, "vlan_id")) {
1549 len = num_arg(&user_buffer[i], 4, &value);
1550 if (len < 0)
1551 return len;
1552
1553 i += len;
1554 if (value <= 4095) {
1555 pkt_dev->vlan_id = value; /* turn on VLAN */
1556
1557 if (debug)
1558 pr_debug("VLAN turned on\n");
1559
1560 if (debug && pkt_dev->nr_labels)
1561 pr_debug("MPLS auto turned off\n");
1562
1563 pkt_dev->nr_labels = 0; /* turn off MPLS */
1564 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1565 } else {
1566 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1567 pkt_dev->svlan_id = 0xffff;
1568
1569 if (debug)
1570 pr_debug("VLAN/SVLAN turned off\n");
1571 }
1572 return count;
1573 }
1574
1575 if (!strcmp(name, "vlan_p")) {
1576 len = num_arg(&user_buffer[i], 1, &value);
1577 if (len < 0)
1578 return len;
1579
1580 i += len;
1581 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1582 pkt_dev->vlan_p = value;
1583 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1584 } else {
1585 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1586 }
1587 return count;
1588 }
1589
1590 if (!strcmp(name, "vlan_cfi")) {
1591 len = num_arg(&user_buffer[i], 1, &value);
1592 if (len < 0)
1593 return len;
1594
1595 i += len;
1596 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1597 pkt_dev->vlan_cfi = value;
1598 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1599 } else {
1600 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1601 }
1602 return count;
1603 }
1604
1605 if (!strcmp(name, "svlan_id")) {
1606 len = num_arg(&user_buffer[i], 4, &value);
1607 if (len < 0)
1608 return len;
1609
1610 i += len;
1611 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1612 pkt_dev->svlan_id = value; /* turn on SVLAN */
1613
1614 if (debug)
1615 pr_debug("SVLAN turned on\n");
1616
1617 if (debug && pkt_dev->nr_labels)
1618 pr_debug("MPLS auto turned off\n");
1619
1620 pkt_dev->nr_labels = 0; /* turn off MPLS */
1621 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1622 } else {
1623 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1624 pkt_dev->svlan_id = 0xffff;
1625
1626 if (debug)
1627 pr_debug("VLAN/SVLAN turned off\n");
1628 }
1629 return count;
1630 }
1631
1632 if (!strcmp(name, "svlan_p")) {
1633 len = num_arg(&user_buffer[i], 1, &value);
1634 if (len < 0)
1635 return len;
1636
1637 i += len;
1638 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1639 pkt_dev->svlan_p = value;
1640 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1641 } else {
1642 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1643 }
1644 return count;
1645 }
1646
1647 if (!strcmp(name, "svlan_cfi")) {
1648 len = num_arg(&user_buffer[i], 1, &value);
1649 if (len < 0)
1650 return len;
1651
1652 i += len;
1653 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1654 pkt_dev->svlan_cfi = value;
1655 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1656 } else {
1657 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1658 }
1659 return count;
1660 }
1661
1662 if (!strcmp(name, "tos")) {
1663 __u32 tmp_value = 0;
1664 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1665 if (len < 0)
1666 return len;
1667
1668 i += len;
1669 if (len == 2) {
1670 pkt_dev->tos = tmp_value;
1671 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1672 } else {
1673 sprintf(pg_result, "ERROR: tos must be 00-ff");
1674 }
1675 return count;
1676 }
1677
1678 if (!strcmp(name, "traffic_class")) {
1679 __u32 tmp_value = 0;
1680 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1681 if (len < 0)
1682 return len;
1683
1684 i += len;
1685 if (len == 2) {
1686 pkt_dev->traffic_class = tmp_value;
1687 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1688 } else {
1689 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1690 }
1691 return count;
1692 }
1693
1694 if (!strcmp(name, "skb_priority")) {
1695 len = num_arg(&user_buffer[i], 9, &value);
1696 if (len < 0)
1697 return len;
1698
1699 i += len;
1700 pkt_dev->skb_priority = value;
1701 sprintf(pg_result, "OK: skb_priority=%i",
1702 pkt_dev->skb_priority);
1703 return count;
1704 }
1705
1706 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1707 return -EINVAL;
1708 }
1709
1710 static int pktgen_if_open(struct inode *inode, struct file *file)
1711 {
1712 return single_open(file, pktgen_if_show, PDE_DATA(inode));
1713 }
1714
1715 static const struct file_operations pktgen_if_fops = {
1716 .owner = THIS_MODULE,
1717 .open = pktgen_if_open,
1718 .read = seq_read,
1719 .llseek = seq_lseek,
1720 .write = pktgen_if_write,
1721 .release = single_release,
1722 };
1723
1724 static int pktgen_thread_show(struct seq_file *seq, void *v)
1725 {
1726 struct pktgen_thread *t = seq->private;
1727 const struct pktgen_dev *pkt_dev;
1728
1729 BUG_ON(!t);
1730
1731 seq_printf(seq, "Running: ");
1732
1733 if_lock(t);
1734 list_for_each_entry(pkt_dev, &t->if_list, list)
1735 if (pkt_dev->running)
1736 seq_printf(seq, "%s ", pkt_dev->odevname);
1737
1738 seq_printf(seq, "\nStopped: ");
1739
1740 list_for_each_entry(pkt_dev, &t->if_list, list)
1741 if (!pkt_dev->running)
1742 seq_printf(seq, "%s ", pkt_dev->odevname);
1743
1744 if (t->result[0])
1745 seq_printf(seq, "\nResult: %s\n", t->result);
1746 else
1747 seq_printf(seq, "\nResult: NA\n");
1748
1749 if_unlock(t);
1750
1751 return 0;
1752 }
1753
1754 static ssize_t pktgen_thread_write(struct file *file,
1755 const char __user * user_buffer,
1756 size_t count, loff_t * offset)
1757 {
1758 struct seq_file *seq = file->private_data;
1759 struct pktgen_thread *t = seq->private;
1760 int i, max, len, ret;
1761 char name[40];
1762 char *pg_result;
1763
1764 if (count < 1) {
1765 // sprintf(pg_result, "Wrong command format");
1766 return -EINVAL;
1767 }
1768
1769 max = count;
1770 len = count_trail_chars(user_buffer, max);
1771 if (len < 0)
1772 return len;
1773
1774 i = len;
1775
1776 /* Read variable name */
1777
1778 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1779 if (len < 0)
1780 return len;
1781
1782 memset(name, 0, sizeof(name));
1783 if (copy_from_user(name, &user_buffer[i], len))
1784 return -EFAULT;
1785 i += len;
1786
1787 max = count - i;
1788 len = count_trail_chars(&user_buffer[i], max);
1789 if (len < 0)
1790 return len;
1791
1792 i += len;
1793
1794 if (debug)
1795 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
1796
1797 if (!t) {
1798 pr_err("ERROR: No thread\n");
1799 ret = -EINVAL;
1800 goto out;
1801 }
1802
1803 pg_result = &(t->result[0]);
1804
1805 if (!strcmp(name, "add_device")) {
1806 char f[32];
1807 memset(f, 0, 32);
1808 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1809 if (len < 0) {
1810 ret = len;
1811 goto out;
1812 }
1813 if (copy_from_user(f, &user_buffer[i], len))
1814 return -EFAULT;
1815 i += len;
1816 mutex_lock(&pktgen_thread_lock);
1817 ret = pktgen_add_device(t, f);
1818 mutex_unlock(&pktgen_thread_lock);
1819 if (!ret) {
1820 ret = count;
1821 sprintf(pg_result, "OK: add_device=%s", f);
1822 } else
1823 sprintf(pg_result, "ERROR: can not add device %s", f);
1824 goto out;
1825 }
1826
1827 if (!strcmp(name, "rem_device_all")) {
1828 mutex_lock(&pktgen_thread_lock);
1829 t->control |= T_REMDEVALL;
1830 mutex_unlock(&pktgen_thread_lock);
1831 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1832 ret = count;
1833 sprintf(pg_result, "OK: rem_device_all");
1834 goto out;
1835 }
1836
1837 if (!strcmp(name, "max_before_softirq")) {
1838 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1839 ret = count;
1840 goto out;
1841 }
1842
1843 ret = -EINVAL;
1844 out:
1845 return ret;
1846 }
1847
1848 static int pktgen_thread_open(struct inode *inode, struct file *file)
1849 {
1850 return single_open(file, pktgen_thread_show, PDE_DATA(inode));
1851 }
1852
1853 static const struct file_operations pktgen_thread_fops = {
1854 .owner = THIS_MODULE,
1855 .open = pktgen_thread_open,
1856 .read = seq_read,
1857 .llseek = seq_lseek,
1858 .write = pktgen_thread_write,
1859 .release = single_release,
1860 };
1861
1862 /* Think find or remove for NN */
1863 static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn,
1864 const char *ifname, int remove)
1865 {
1866 struct pktgen_thread *t;
1867 struct pktgen_dev *pkt_dev = NULL;
1868 bool exact = (remove == FIND);
1869
1870 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1871 pkt_dev = pktgen_find_dev(t, ifname, exact);
1872 if (pkt_dev) {
1873 if (remove) {
1874 if_lock(t);
1875 pkt_dev->removal_mark = 1;
1876 t->control |= T_REMDEV;
1877 if_unlock(t);
1878 }
1879 break;
1880 }
1881 }
1882 return pkt_dev;
1883 }
1884
1885 /*
1886 * mark a device for removal
1887 */
1888 static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname)
1889 {
1890 struct pktgen_dev *pkt_dev = NULL;
1891 const int max_tries = 10, msec_per_try = 125;
1892 int i = 0;
1893
1894 mutex_lock(&pktgen_thread_lock);
1895 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1896
1897 while (1) {
1898
1899 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE);
1900 if (pkt_dev == NULL)
1901 break; /* success */
1902
1903 mutex_unlock(&pktgen_thread_lock);
1904 pr_debug("%s: waiting for %s to disappear....\n",
1905 __func__, ifname);
1906 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1907 mutex_lock(&pktgen_thread_lock);
1908
1909 if (++i >= max_tries) {
1910 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1911 __func__, msec_per_try * i, ifname);
1912 break;
1913 }
1914
1915 }
1916
1917 mutex_unlock(&pktgen_thread_lock);
1918 }
1919
1920 static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev)
1921 {
1922 struct pktgen_thread *t;
1923
1924 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1925 struct pktgen_dev *pkt_dev;
1926
1927 list_for_each_entry(pkt_dev, &t->if_list, list) {
1928 if (pkt_dev->odev != dev)
1929 continue;
1930
1931 proc_remove(pkt_dev->entry);
1932
1933 pkt_dev->entry = proc_create_data(dev->name, 0600,
1934 pn->proc_dir,
1935 &pktgen_if_fops,
1936 pkt_dev);
1937 if (!pkt_dev->entry)
1938 pr_err("can't move proc entry for '%s'\n",
1939 dev->name);
1940 break;
1941 }
1942 }
1943 }
1944
1945 static int pktgen_device_event(struct notifier_block *unused,
1946 unsigned long event, void *ptr)
1947 {
1948 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1949 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id);
1950
1951 if (pn->pktgen_exiting)
1952 return NOTIFY_DONE;
1953
1954 /* It is OK that we do not hold the group lock right now,
1955 * as we run under the RTNL lock.
1956 */
1957
1958 switch (event) {
1959 case NETDEV_CHANGENAME:
1960 pktgen_change_name(pn, dev);
1961 break;
1962
1963 case NETDEV_UNREGISTER:
1964 pktgen_mark_device(pn, dev->name);
1965 break;
1966 }
1967
1968 return NOTIFY_DONE;
1969 }
1970
1971 static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn,
1972 struct pktgen_dev *pkt_dev,
1973 const char *ifname)
1974 {
1975 char b[IFNAMSIZ+5];
1976 int i;
1977
1978 for (i = 0; ifname[i] != '@'; i++) {
1979 if (i == IFNAMSIZ)
1980 break;
1981
1982 b[i] = ifname[i];
1983 }
1984 b[i] = 0;
1985
1986 return dev_get_by_name(pn->net, b);
1987 }
1988
1989
1990 /* Associate pktgen_dev with a device. */
1991
1992 static int pktgen_setup_dev(const struct pktgen_net *pn,
1993 struct pktgen_dev *pkt_dev, const char *ifname)
1994 {
1995 struct net_device *odev;
1996 int err;
1997
1998 /* Clean old setups */
1999 if (pkt_dev->odev) {
2000 dev_put(pkt_dev->odev);
2001 pkt_dev->odev = NULL;
2002 }
2003
2004 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname);
2005 if (!odev) {
2006 pr_err("no such netdevice: \"%s\"\n", ifname);
2007 return -ENODEV;
2008 }
2009
2010 if (odev->type != ARPHRD_ETHER) {
2011 pr_err("not an ethernet device: \"%s\"\n", ifname);
2012 err = -EINVAL;
2013 } else if (!netif_running(odev)) {
2014 pr_err("device is down: \"%s\"\n", ifname);
2015 err = -ENETDOWN;
2016 } else {
2017 pkt_dev->odev = odev;
2018 return 0;
2019 }
2020
2021 dev_put(odev);
2022 return err;
2023 }
2024
2025 /* Read pkt_dev from the interface and set up internal pktgen_dev
2026 * structure to have the right information to create/send packets
2027 */
2028 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2029 {
2030 int ntxq;
2031
2032 if (!pkt_dev->odev) {
2033 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2034 sprintf(pkt_dev->result,
2035 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2036 return;
2037 }
2038
2039 /* make sure that we don't pick a non-existing transmit queue */
2040 ntxq = pkt_dev->odev->real_num_tx_queues;
2041
2042 if (ntxq <= pkt_dev->queue_map_min) {
2043 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2044 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2045 pkt_dev->odevname);
2046 pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2047 }
2048 if (pkt_dev->queue_map_max >= ntxq) {
2049 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2050 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2051 pkt_dev->odevname);
2052 pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2053 }
2054
2055 /* Default to the interface's mac if not explicitly set. */
2056
2057 if (is_zero_ether_addr(pkt_dev->src_mac))
2058 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2059
2060 /* Set up Dest MAC */
2061 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2062
2063 if (pkt_dev->flags & F_IPV6) {
2064 int i, set = 0, err = 1;
2065 struct inet6_dev *idev;
2066
2067 if (pkt_dev->min_pkt_size == 0) {
2068 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
2069 + sizeof(struct udphdr)
2070 + sizeof(struct pktgen_hdr)
2071 + pkt_dev->pkt_overhead;
2072 }
2073
2074 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2075 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2076 set = 1;
2077 break;
2078 }
2079
2080 if (!set) {
2081
2082 /*
2083 * Use linklevel address if unconfigured.
2084 *
2085 * use ipv6_get_lladdr if/when it's get exported
2086 */
2087
2088 rcu_read_lock();
2089 idev = __in6_dev_get(pkt_dev->odev);
2090 if (idev) {
2091 struct inet6_ifaddr *ifp;
2092
2093 read_lock_bh(&idev->lock);
2094 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2095 if ((ifp->scope & IFA_LINK) &&
2096 !(ifp->flags & IFA_F_TENTATIVE)) {
2097 pkt_dev->cur_in6_saddr = ifp->addr;
2098 err = 0;
2099 break;
2100 }
2101 }
2102 read_unlock_bh(&idev->lock);
2103 }
2104 rcu_read_unlock();
2105 if (err)
2106 pr_err("ERROR: IPv6 link address not available\n");
2107 }
2108 } else {
2109 if (pkt_dev->min_pkt_size == 0) {
2110 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
2111 + sizeof(struct udphdr)
2112 + sizeof(struct pktgen_hdr)
2113 + pkt_dev->pkt_overhead;
2114 }
2115
2116 pkt_dev->saddr_min = 0;
2117 pkt_dev->saddr_max = 0;
2118 if (strlen(pkt_dev->src_min) == 0) {
2119
2120 struct in_device *in_dev;
2121
2122 rcu_read_lock();
2123 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2124 if (in_dev) {
2125 if (in_dev->ifa_list) {
2126 pkt_dev->saddr_min =
2127 in_dev->ifa_list->ifa_address;
2128 pkt_dev->saddr_max = pkt_dev->saddr_min;
2129 }
2130 }
2131 rcu_read_unlock();
2132 } else {
2133 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2134 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2135 }
2136
2137 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2138 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2139 }
2140 /* Initialize current values. */
2141 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2142 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
2143 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
2144
2145 pkt_dev->cur_dst_mac_offset = 0;
2146 pkt_dev->cur_src_mac_offset = 0;
2147 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2148 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2149 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2150 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2151 pkt_dev->nflows = 0;
2152 }
2153
2154
2155 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2156 {
2157 ktime_t start_time, end_time;
2158 s64 remaining;
2159 struct hrtimer_sleeper t;
2160
2161 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2162 hrtimer_set_expires(&t.timer, spin_until);
2163
2164 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2165 if (remaining <= 0) {
2166 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2167 return;
2168 }
2169
2170 start_time = ktime_get();
2171 if (remaining < 100000) {
2172 /* for small delays (<100us), just loop until limit is reached */
2173 do {
2174 end_time = ktime_get();
2175 } while (ktime_compare(end_time, spin_until) < 0);
2176 } else {
2177 /* see do_nanosleep */
2178 hrtimer_init_sleeper(&t, current);
2179 do {
2180 set_current_state(TASK_INTERRUPTIBLE);
2181 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2182 if (!hrtimer_active(&t.timer))
2183 t.task = NULL;
2184
2185 if (likely(t.task))
2186 schedule();
2187
2188 hrtimer_cancel(&t.timer);
2189 } while (t.task && pkt_dev->running && !signal_pending(current));
2190 __set_current_state(TASK_RUNNING);
2191 end_time = ktime_get();
2192 }
2193
2194 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2195 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2196 }
2197
2198 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2199 {
2200 pkt_dev->pkt_overhead = 0;
2201 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2202 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2203 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2204 }
2205
2206 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2207 {
2208 return !!(pkt_dev->flows[flow].flags & F_INIT);
2209 }
2210
2211 static inline int f_pick(struct pktgen_dev *pkt_dev)
2212 {
2213 int flow = pkt_dev->curfl;
2214
2215 if (pkt_dev->flags & F_FLOW_SEQ) {
2216 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2217 /* reset time */
2218 pkt_dev->flows[flow].count = 0;
2219 pkt_dev->flows[flow].flags = 0;
2220 pkt_dev->curfl += 1;
2221 if (pkt_dev->curfl >= pkt_dev->cflows)
2222 pkt_dev->curfl = 0; /*reset */
2223 }
2224 } else {
2225 flow = prandom_u32() % pkt_dev->cflows;
2226 pkt_dev->curfl = flow;
2227
2228 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2229 pkt_dev->flows[flow].count = 0;
2230 pkt_dev->flows[flow].flags = 0;
2231 }
2232 }
2233
2234 return pkt_dev->curfl;
2235 }
2236
2237
2238 #ifdef CONFIG_XFRM
2239 /* If there was already an IPSEC SA, we keep it as is, else
2240 * we go look for it ...
2241 */
2242 #define DUMMY_MARK 0
2243 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2244 {
2245 struct xfrm_state *x = pkt_dev->flows[flow].x;
2246 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
2247 if (!x) {
2248 /*slow path: we dont already have xfrm_state*/
2249 x = xfrm_stateonly_find(pn->net, DUMMY_MARK,
2250 (xfrm_address_t *)&pkt_dev->cur_daddr,
2251 (xfrm_address_t *)&pkt_dev->cur_saddr,
2252 AF_INET,
2253 pkt_dev->ipsmode,
2254 pkt_dev->ipsproto, 0);
2255 if (x) {
2256 pkt_dev->flows[flow].x = x;
2257 set_pkt_overhead(pkt_dev);
2258 pkt_dev->pkt_overhead += x->props.header_len;
2259 }
2260
2261 }
2262 }
2263 #endif
2264 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2265 {
2266
2267 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2268 pkt_dev->cur_queue_map = smp_processor_id();
2269
2270 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2271 __u16 t;
2272 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2273 t = prandom_u32() %
2274 (pkt_dev->queue_map_max -
2275 pkt_dev->queue_map_min + 1)
2276 + pkt_dev->queue_map_min;
2277 } else {
2278 t = pkt_dev->cur_queue_map + 1;
2279 if (t > pkt_dev->queue_map_max)
2280 t = pkt_dev->queue_map_min;
2281 }
2282 pkt_dev->cur_queue_map = t;
2283 }
2284 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2285 }
2286
2287 /* Increment/randomize headers according to flags and current values
2288 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2289 */
2290 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2291 {
2292 __u32 imn;
2293 __u32 imx;
2294 int flow = 0;
2295
2296 if (pkt_dev->cflows)
2297 flow = f_pick(pkt_dev);
2298
2299 /* Deal with source MAC */
2300 if (pkt_dev->src_mac_count > 1) {
2301 __u32 mc;
2302 __u32 tmp;
2303
2304 if (pkt_dev->flags & F_MACSRC_RND)
2305 mc = prandom_u32() % pkt_dev->src_mac_count;
2306 else {
2307 mc = pkt_dev->cur_src_mac_offset++;
2308 if (pkt_dev->cur_src_mac_offset >=
2309 pkt_dev->src_mac_count)
2310 pkt_dev->cur_src_mac_offset = 0;
2311 }
2312
2313 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2314 pkt_dev->hh[11] = tmp;
2315 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2316 pkt_dev->hh[10] = tmp;
2317 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2318 pkt_dev->hh[9] = tmp;
2319 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2320 pkt_dev->hh[8] = tmp;
2321 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2322 pkt_dev->hh[7] = tmp;
2323 }
2324
2325 /* Deal with Destination MAC */
2326 if (pkt_dev->dst_mac_count > 1) {
2327 __u32 mc;
2328 __u32 tmp;
2329
2330 if (pkt_dev->flags & F_MACDST_RND)
2331 mc = prandom_u32() % pkt_dev->dst_mac_count;
2332
2333 else {
2334 mc = pkt_dev->cur_dst_mac_offset++;
2335 if (pkt_dev->cur_dst_mac_offset >=
2336 pkt_dev->dst_mac_count) {
2337 pkt_dev->cur_dst_mac_offset = 0;
2338 }
2339 }
2340
2341 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2342 pkt_dev->hh[5] = tmp;
2343 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2344 pkt_dev->hh[4] = tmp;
2345 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2346 pkt_dev->hh[3] = tmp;
2347 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2348 pkt_dev->hh[2] = tmp;
2349 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2350 pkt_dev->hh[1] = tmp;
2351 }
2352
2353 if (pkt_dev->flags & F_MPLS_RND) {
2354 unsigned int i;
2355 for (i = 0; i < pkt_dev->nr_labels; i++)
2356 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2357 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2358 ((__force __be32)prandom_u32() &
2359 htonl(0x000fffff));
2360 }
2361
2362 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2363 pkt_dev->vlan_id = prandom_u32() & (4096 - 1);
2364 }
2365
2366 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2367 pkt_dev->svlan_id = prandom_u32() & (4096 - 1);
2368 }
2369
2370 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2371 if (pkt_dev->flags & F_UDPSRC_RND)
2372 pkt_dev->cur_udp_src = prandom_u32() %
2373 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2374 + pkt_dev->udp_src_min;
2375
2376 else {
2377 pkt_dev->cur_udp_src++;
2378 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2379 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2380 }
2381 }
2382
2383 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2384 if (pkt_dev->flags & F_UDPDST_RND) {
2385 pkt_dev->cur_udp_dst = prandom_u32() %
2386 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2387 + pkt_dev->udp_dst_min;
2388 } else {
2389 pkt_dev->cur_udp_dst++;
2390 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2391 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2392 }
2393 }
2394
2395 if (!(pkt_dev->flags & F_IPV6)) {
2396
2397 imn = ntohl(pkt_dev->saddr_min);
2398 imx = ntohl(pkt_dev->saddr_max);
2399 if (imn < imx) {
2400 __u32 t;
2401 if (pkt_dev->flags & F_IPSRC_RND)
2402 t = prandom_u32() % (imx - imn) + imn;
2403 else {
2404 t = ntohl(pkt_dev->cur_saddr);
2405 t++;
2406 if (t > imx)
2407 t = imn;
2408
2409 }
2410 pkt_dev->cur_saddr = htonl(t);
2411 }
2412
2413 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2414 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2415 } else {
2416 imn = ntohl(pkt_dev->daddr_min);
2417 imx = ntohl(pkt_dev->daddr_max);
2418 if (imn < imx) {
2419 __u32 t;
2420 __be32 s;
2421 if (pkt_dev->flags & F_IPDST_RND) {
2422
2423 do {
2424 t = prandom_u32() %
2425 (imx - imn) + imn;
2426 s = htonl(t);
2427 } while (ipv4_is_loopback(s) ||
2428 ipv4_is_multicast(s) ||
2429 ipv4_is_lbcast(s) ||
2430 ipv4_is_zeronet(s) ||
2431 ipv4_is_local_multicast(s));
2432 pkt_dev->cur_daddr = s;
2433 } else {
2434 t = ntohl(pkt_dev->cur_daddr);
2435 t++;
2436 if (t > imx) {
2437 t = imn;
2438 }
2439 pkt_dev->cur_daddr = htonl(t);
2440 }
2441 }
2442 if (pkt_dev->cflows) {
2443 pkt_dev->flows[flow].flags |= F_INIT;
2444 pkt_dev->flows[flow].cur_daddr =
2445 pkt_dev->cur_daddr;
2446 #ifdef CONFIG_XFRM
2447 if (pkt_dev->flags & F_IPSEC_ON)
2448 get_ipsec_sa(pkt_dev, flow);
2449 #endif
2450 pkt_dev->nflows++;
2451 }
2452 }
2453 } else { /* IPV6 * */
2454
2455 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
2456 int i;
2457
2458 /* Only random destinations yet */
2459
2460 for (i = 0; i < 4; i++) {
2461 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2462 (((__force __be32)prandom_u32() |
2463 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2464 pkt_dev->max_in6_daddr.s6_addr32[i]);
2465 }
2466 }
2467 }
2468
2469 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2470 __u32 t;
2471 if (pkt_dev->flags & F_TXSIZE_RND) {
2472 t = prandom_u32() %
2473 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2474 + pkt_dev->min_pkt_size;
2475 } else {
2476 t = pkt_dev->cur_pkt_size + 1;
2477 if (t > pkt_dev->max_pkt_size)
2478 t = pkt_dev->min_pkt_size;
2479 }
2480 pkt_dev->cur_pkt_size = t;
2481 }
2482
2483 set_cur_queue_map(pkt_dev);
2484
2485 pkt_dev->flows[flow].count++;
2486 }
2487
2488
2489 #ifdef CONFIG_XFRM
2490 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2491 {
2492 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2493 int err = 0;
2494 struct net *net = dev_net(pkt_dev->odev);
2495
2496 if (!x)
2497 return 0;
2498 /* XXX: we dont support tunnel mode for now until
2499 * we resolve the dst issue */
2500 if (x->props.mode != XFRM_MODE_TRANSPORT)
2501 return 0;
2502
2503 err = x->outer_mode->output(x, skb);
2504 if (err) {
2505 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR);
2506 goto error;
2507 }
2508 err = x->type->output(x, skb);
2509 if (err) {
2510 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR);
2511 goto error;
2512 }
2513 spin_lock_bh(&x->lock);
2514 x->curlft.bytes += skb->len;
2515 x->curlft.packets++;
2516 spin_unlock_bh(&x->lock);
2517 error:
2518 return err;
2519 }
2520
2521 static void free_SAs(struct pktgen_dev *pkt_dev)
2522 {
2523 if (pkt_dev->cflows) {
2524 /* let go of the SAs if we have them */
2525 int i;
2526 for (i = 0; i < pkt_dev->cflows; i++) {
2527 struct xfrm_state *x = pkt_dev->flows[i].x;
2528 if (x) {
2529 xfrm_state_put(x);
2530 pkt_dev->flows[i].x = NULL;
2531 }
2532 }
2533 }
2534 }
2535
2536 static int process_ipsec(struct pktgen_dev *pkt_dev,
2537 struct sk_buff *skb, __be16 protocol)
2538 {
2539 if (pkt_dev->flags & F_IPSEC_ON) {
2540 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2541 int nhead = 0;
2542 if (x) {
2543 int ret;
2544 __u8 *eth;
2545 struct iphdr *iph;
2546
2547 nhead = x->props.header_len - skb_headroom(skb);
2548 if (nhead > 0) {
2549 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2550 if (ret < 0) {
2551 pr_err("Error expanding ipsec packet %d\n",
2552 ret);
2553 goto err;
2554 }
2555 }
2556
2557 /* ipsec is not expecting ll header */
2558 skb_pull(skb, ETH_HLEN);
2559 ret = pktgen_output_ipsec(skb, pkt_dev);
2560 if (ret) {
2561 pr_err("Error creating ipsec packet %d\n", ret);
2562 goto err;
2563 }
2564 /* restore ll */
2565 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2566 memcpy(eth, pkt_dev->hh, 12);
2567 *(u16 *) &eth[12] = protocol;
2568
2569 /* Update IPv4 header len as well as checksum value */
2570 iph = ip_hdr(skb);
2571 iph->tot_len = htons(skb->len - ETH_HLEN);
2572 ip_send_check(iph);
2573 }
2574 }
2575 return 1;
2576 err:
2577 kfree_skb(skb);
2578 return 0;
2579 }
2580 #endif
2581
2582 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2583 {
2584 unsigned int i;
2585 for (i = 0; i < pkt_dev->nr_labels; i++)
2586 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2587
2588 mpls--;
2589 *mpls |= MPLS_STACK_BOTTOM;
2590 }
2591
2592 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2593 unsigned int prio)
2594 {
2595 return htons(id | (cfi << 12) | (prio << 13));
2596 }
2597
2598 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2599 int datalen)
2600 {
2601 struct timeval timestamp;
2602 struct pktgen_hdr *pgh;
2603
2604 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
2605 datalen -= sizeof(*pgh);
2606
2607 if (pkt_dev->nfrags <= 0) {
2608 memset(skb_put(skb, datalen), 0, datalen);
2609 } else {
2610 int frags = pkt_dev->nfrags;
2611 int i, len;
2612 int frag_len;
2613
2614
2615 if (frags > MAX_SKB_FRAGS)
2616 frags = MAX_SKB_FRAGS;
2617 len = datalen - frags * PAGE_SIZE;
2618 if (len > 0) {
2619 memset(skb_put(skb, len), 0, len);
2620 datalen = frags * PAGE_SIZE;
2621 }
2622
2623 i = 0;
2624 frag_len = (datalen/frags) < PAGE_SIZE ?
2625 (datalen/frags) : PAGE_SIZE;
2626 while (datalen > 0) {
2627 if (unlikely(!pkt_dev->page)) {
2628 int node = numa_node_id();
2629
2630 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2631 node = pkt_dev->node;
2632 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2633 if (!pkt_dev->page)
2634 break;
2635 }
2636 get_page(pkt_dev->page);
2637 skb_frag_set_page(skb, i, pkt_dev->page);
2638 skb_shinfo(skb)->frags[i].page_offset = 0;
2639 /*last fragment, fill rest of data*/
2640 if (i == (frags - 1))
2641 skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2642 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2643 else
2644 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2645 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2646 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2647 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2648 i++;
2649 skb_shinfo(skb)->nr_frags = i;
2650 }
2651 }
2652
2653 /* Stamp the time, and sequence number,
2654 * convert them to network byte order
2655 */
2656 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2657 pgh->seq_num = htonl(pkt_dev->seq_num);
2658
2659 do_gettimeofday(&timestamp);
2660 pgh->tv_sec = htonl(timestamp.tv_sec);
2661 pgh->tv_usec = htonl(timestamp.tv_usec);
2662 }
2663
2664 static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
2665 struct pktgen_dev *pkt_dev,
2666 unsigned int extralen)
2667 {
2668 struct sk_buff *skb = NULL;
2669 unsigned int size = pkt_dev->cur_pkt_size + 64 + extralen +
2670 pkt_dev->pkt_overhead;
2671
2672 if (pkt_dev->flags & F_NODE) {
2673 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id();
2674
2675 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node);
2676 if (likely(skb)) {
2677 skb_reserve(skb, NET_SKB_PAD);
2678 skb->dev = dev;
2679 }
2680 } else {
2681 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
2682 }
2683
2684 return skb;
2685 }
2686
2687 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2688 struct pktgen_dev *pkt_dev)
2689 {
2690 struct sk_buff *skb = NULL;
2691 __u8 *eth;
2692 struct udphdr *udph;
2693 int datalen, iplen;
2694 struct iphdr *iph;
2695 __be16 protocol = htons(ETH_P_IP);
2696 __be32 *mpls;
2697 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2698 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2699 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2700 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2701 u16 queue_map;
2702
2703 if (pkt_dev->nr_labels)
2704 protocol = htons(ETH_P_MPLS_UC);
2705
2706 if (pkt_dev->vlan_id != 0xffff)
2707 protocol = htons(ETH_P_8021Q);
2708
2709 /* Update any of the values, used when we're incrementing various
2710 * fields.
2711 */
2712 mod_cur_headers(pkt_dev);
2713 queue_map = pkt_dev->cur_queue_map;
2714
2715 datalen = (odev->hard_header_len + 16) & ~0xf;
2716
2717 skb = pktgen_alloc_skb(odev, pkt_dev, datalen);
2718 if (!skb) {
2719 sprintf(pkt_dev->result, "No memory");
2720 return NULL;
2721 }
2722
2723 prefetchw(skb->data);
2724 skb_reserve(skb, datalen);
2725
2726 /* Reserve for ethernet and IP header */
2727 eth = (__u8 *) skb_push(skb, 14);
2728 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2729 if (pkt_dev->nr_labels)
2730 mpls_push(mpls, pkt_dev);
2731
2732 if (pkt_dev->vlan_id != 0xffff) {
2733 if (pkt_dev->svlan_id != 0xffff) {
2734 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2735 *svlan_tci = build_tci(pkt_dev->svlan_id,
2736 pkt_dev->svlan_cfi,
2737 pkt_dev->svlan_p);
2738 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2739 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2740 }
2741 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2742 *vlan_tci = build_tci(pkt_dev->vlan_id,
2743 pkt_dev->vlan_cfi,
2744 pkt_dev->vlan_p);
2745 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2746 *vlan_encapsulated_proto = htons(ETH_P_IP);
2747 }
2748
2749 skb_set_mac_header(skb, 0);
2750 skb_set_network_header(skb, skb->len);
2751 iph = (struct iphdr *) skb_put(skb, sizeof(struct iphdr));
2752
2753 skb_set_transport_header(skb, skb->len);
2754 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2755 skb_set_queue_mapping(skb, queue_map);
2756 skb->priority = pkt_dev->skb_priority;
2757
2758 memcpy(eth, pkt_dev->hh, 12);
2759 *(__be16 *) & eth[12] = protocol;
2760
2761 /* Eth + IPh + UDPh + mpls */
2762 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2763 pkt_dev->pkt_overhead;
2764 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
2765 datalen = sizeof(struct pktgen_hdr);
2766
2767 udph->source = htons(pkt_dev->cur_udp_src);
2768 udph->dest = htons(pkt_dev->cur_udp_dst);
2769 udph->len = htons(datalen + 8); /* DATA + udphdr */
2770 udph->check = 0;
2771
2772 iph->ihl = 5;
2773 iph->version = 4;
2774 iph->ttl = 32;
2775 iph->tos = pkt_dev->tos;
2776 iph->protocol = IPPROTO_UDP; /* UDP */
2777 iph->saddr = pkt_dev->cur_saddr;
2778 iph->daddr = pkt_dev->cur_daddr;
2779 iph->id = htons(pkt_dev->ip_id);
2780 pkt_dev->ip_id++;
2781 iph->frag_off = 0;
2782 iplen = 20 + 8 + datalen;
2783 iph->tot_len = htons(iplen);
2784 ip_send_check(iph);
2785 skb->protocol = protocol;
2786 skb->dev = odev;
2787 skb->pkt_type = PACKET_HOST;
2788
2789 if (!(pkt_dev->flags & F_UDPCSUM)) {
2790 skb->ip_summed = CHECKSUM_NONE;
2791 } else if (odev->features & NETIF_F_V4_CSUM) {
2792 skb->ip_summed = CHECKSUM_PARTIAL;
2793 skb->csum = 0;
2794 udp4_hwcsum(skb, udph->source, udph->dest);
2795 } else {
2796 __wsum csum = udp_csum(skb);
2797
2798 /* add protocol-dependent pseudo-header */
2799 udph->check = csum_tcpudp_magic(udph->source, udph->dest,
2800 datalen + 8, IPPROTO_UDP, csum);
2801
2802 if (udph->check == 0)
2803 udph->check = CSUM_MANGLED_0;
2804 }
2805
2806 pktgen_finalize_skb(pkt_dev, skb, datalen);
2807
2808 #ifdef CONFIG_XFRM
2809 if (!process_ipsec(pkt_dev, skb, protocol))
2810 return NULL;
2811 #endif
2812
2813 return skb;
2814 }
2815
2816 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2817 struct pktgen_dev *pkt_dev)
2818 {
2819 struct sk_buff *skb = NULL;
2820 __u8 *eth;
2821 struct udphdr *udph;
2822 int datalen, udplen;
2823 struct ipv6hdr *iph;
2824 __be16 protocol = htons(ETH_P_IPV6);
2825 __be32 *mpls;
2826 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2827 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2828 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2829 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2830 u16 queue_map;
2831
2832 if (pkt_dev->nr_labels)
2833 protocol = htons(ETH_P_MPLS_UC);
2834
2835 if (pkt_dev->vlan_id != 0xffff)
2836 protocol = htons(ETH_P_8021Q);
2837
2838 /* Update any of the values, used when we're incrementing various
2839 * fields.
2840 */
2841 mod_cur_headers(pkt_dev);
2842 queue_map = pkt_dev->cur_queue_map;
2843
2844 skb = pktgen_alloc_skb(odev, pkt_dev, 16);
2845 if (!skb) {
2846 sprintf(pkt_dev->result, "No memory");
2847 return NULL;
2848 }
2849
2850 prefetchw(skb->data);
2851 skb_reserve(skb, 16);
2852
2853 /* Reserve for ethernet and IP header */
2854 eth = (__u8 *) skb_push(skb, 14);
2855 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2856 if (pkt_dev->nr_labels)
2857 mpls_push(mpls, pkt_dev);
2858
2859 if (pkt_dev->vlan_id != 0xffff) {
2860 if (pkt_dev->svlan_id != 0xffff) {
2861 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2862 *svlan_tci = build_tci(pkt_dev->svlan_id,
2863 pkt_dev->svlan_cfi,
2864 pkt_dev->svlan_p);
2865 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2866 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2867 }
2868 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2869 *vlan_tci = build_tci(pkt_dev->vlan_id,
2870 pkt_dev->vlan_cfi,
2871 pkt_dev->vlan_p);
2872 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2873 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2874 }
2875
2876 skb_set_mac_header(skb, 0);
2877 skb_set_network_header(skb, skb->len);
2878 iph = (struct ipv6hdr *) skb_put(skb, sizeof(struct ipv6hdr));
2879
2880 skb_set_transport_header(skb, skb->len);
2881 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2882 skb_set_queue_mapping(skb, queue_map);
2883 skb->priority = pkt_dev->skb_priority;
2884
2885 memcpy(eth, pkt_dev->hh, 12);
2886 *(__be16 *) &eth[12] = protocol;
2887
2888 /* Eth + IPh + UDPh + mpls */
2889 datalen = pkt_dev->cur_pkt_size - 14 -
2890 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2891 pkt_dev->pkt_overhead;
2892
2893 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
2894 datalen = sizeof(struct pktgen_hdr);
2895 net_info_ratelimited("increased datalen to %d\n", datalen);
2896 }
2897
2898 udplen = datalen + sizeof(struct udphdr);
2899 udph->source = htons(pkt_dev->cur_udp_src);
2900 udph->dest = htons(pkt_dev->cur_udp_dst);
2901 udph->len = htons(udplen);
2902 udph->check = 0;
2903
2904 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2905
2906 if (pkt_dev->traffic_class) {
2907 /* Version + traffic class + flow (0) */
2908 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2909 }
2910
2911 iph->hop_limit = 32;
2912
2913 iph->payload_len = htons(udplen);
2914 iph->nexthdr = IPPROTO_UDP;
2915
2916 iph->daddr = pkt_dev->cur_in6_daddr;
2917 iph->saddr = pkt_dev->cur_in6_saddr;
2918
2919 skb->protocol = protocol;
2920 skb->dev = odev;
2921 skb->pkt_type = PACKET_HOST;
2922
2923 if (!(pkt_dev->flags & F_UDPCSUM)) {
2924 skb->ip_summed = CHECKSUM_NONE;
2925 } else if (odev->features & NETIF_F_V6_CSUM) {
2926 skb->ip_summed = CHECKSUM_PARTIAL;
2927 skb->csum_start = skb_transport_header(skb) - skb->head;
2928 skb->csum_offset = offsetof(struct udphdr, check);
2929 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0);
2930 } else {
2931 __wsum csum = udp_csum(skb);
2932
2933 /* add protocol-dependent pseudo-header */
2934 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum);
2935
2936 if (udph->check == 0)
2937 udph->check = CSUM_MANGLED_0;
2938 }
2939
2940 pktgen_finalize_skb(pkt_dev, skb, datalen);
2941
2942 return skb;
2943 }
2944
2945 static struct sk_buff *fill_packet(struct net_device *odev,
2946 struct pktgen_dev *pkt_dev)
2947 {
2948 if (pkt_dev->flags & F_IPV6)
2949 return fill_packet_ipv6(odev, pkt_dev);
2950 else
2951 return fill_packet_ipv4(odev, pkt_dev);
2952 }
2953
2954 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2955 {
2956 pkt_dev->seq_num = 1;
2957 pkt_dev->idle_acc = 0;
2958 pkt_dev->sofar = 0;
2959 pkt_dev->tx_bytes = 0;
2960 pkt_dev->errors = 0;
2961 }
2962
2963 /* Set up structure for sending pkts, clear counters */
2964
2965 static void pktgen_run(struct pktgen_thread *t)
2966 {
2967 struct pktgen_dev *pkt_dev;
2968 int started = 0;
2969
2970 func_enter();
2971
2972 if_lock(t);
2973 list_for_each_entry(pkt_dev, &t->if_list, list) {
2974
2975 /*
2976 * setup odev and create initial packet.
2977 */
2978 pktgen_setup_inject(pkt_dev);
2979
2980 if (pkt_dev->odev) {
2981 pktgen_clear_counters(pkt_dev);
2982 pkt_dev->running = 1; /* Cranke yeself! */
2983 pkt_dev->skb = NULL;
2984 pkt_dev->started_at = pkt_dev->next_tx = ktime_get();
2985
2986 set_pkt_overhead(pkt_dev);
2987
2988 strcpy(pkt_dev->result, "Starting");
2989 started++;
2990 } else
2991 strcpy(pkt_dev->result, "Error starting");
2992 }
2993 if_unlock(t);
2994 if (started)
2995 t->control &= ~(T_STOP);
2996 }
2997
2998 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn)
2999 {
3000 struct pktgen_thread *t;
3001
3002 func_enter();
3003
3004 mutex_lock(&pktgen_thread_lock);
3005
3006 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3007 t->control |= T_STOP;
3008
3009 mutex_unlock(&pktgen_thread_lock);
3010 }
3011
3012 static int thread_is_running(const struct pktgen_thread *t)
3013 {
3014 const struct pktgen_dev *pkt_dev;
3015
3016 list_for_each_entry(pkt_dev, &t->if_list, list)
3017 if (pkt_dev->running)
3018 return 1;
3019 return 0;
3020 }
3021
3022 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3023 {
3024 if_lock(t);
3025
3026 while (thread_is_running(t)) {
3027
3028 if_unlock(t);
3029
3030 msleep_interruptible(100);
3031
3032 if (signal_pending(current))
3033 goto signal;
3034 if_lock(t);
3035 }
3036 if_unlock(t);
3037 return 1;
3038 signal:
3039 return 0;
3040 }
3041
3042 static int pktgen_wait_all_threads_run(struct pktgen_net *pn)
3043 {
3044 struct pktgen_thread *t;
3045 int sig = 1;
3046
3047 mutex_lock(&pktgen_thread_lock);
3048
3049 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
3050 sig = pktgen_wait_thread_run(t);
3051 if (sig == 0)
3052 break;
3053 }
3054
3055 if (sig == 0)
3056 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3057 t->control |= (T_STOP);
3058
3059 mutex_unlock(&pktgen_thread_lock);
3060 return sig;
3061 }
3062
3063 static void pktgen_run_all_threads(struct pktgen_net *pn)
3064 {
3065 struct pktgen_thread *t;
3066
3067 func_enter();
3068
3069 mutex_lock(&pktgen_thread_lock);
3070
3071 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3072 t->control |= (T_RUN);
3073
3074 mutex_unlock(&pktgen_thread_lock);
3075
3076 /* Propagate thread->control */
3077 schedule_timeout_interruptible(msecs_to_jiffies(125));
3078
3079 pktgen_wait_all_threads_run(pn);
3080 }
3081
3082 static void pktgen_reset_all_threads(struct pktgen_net *pn)
3083 {
3084 struct pktgen_thread *t;
3085
3086 func_enter();
3087
3088 mutex_lock(&pktgen_thread_lock);
3089
3090 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3091 t->control |= (T_REMDEVALL);
3092
3093 mutex_unlock(&pktgen_thread_lock);
3094
3095 /* Propagate thread->control */
3096 schedule_timeout_interruptible(msecs_to_jiffies(125));
3097
3098 pktgen_wait_all_threads_run(pn);
3099 }
3100
3101 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3102 {
3103 __u64 bps, mbps, pps;
3104 char *p = pkt_dev->result;
3105 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3106 pkt_dev->started_at);
3107 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3108
3109 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3110 (unsigned long long)ktime_to_us(elapsed),
3111 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3112 (unsigned long long)ktime_to_us(idle),
3113 (unsigned long long)pkt_dev->sofar,
3114 pkt_dev->cur_pkt_size, nr_frags);
3115
3116 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3117 ktime_to_ns(elapsed));
3118
3119 bps = pps * 8 * pkt_dev->cur_pkt_size;
3120
3121 mbps = bps;
3122 do_div(mbps, 1000000);
3123 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3124 (unsigned long long)pps,
3125 (unsigned long long)mbps,
3126 (unsigned long long)bps,
3127 (unsigned long long)pkt_dev->errors);
3128 }
3129
3130 /* Set stopped-at timer, remove from running list, do counters & statistics */
3131 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3132 {
3133 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3134
3135 if (!pkt_dev->running) {
3136 pr_warning("interface: %s is already stopped\n",
3137 pkt_dev->odevname);
3138 return -EINVAL;
3139 }
3140
3141 kfree_skb(pkt_dev->skb);
3142 pkt_dev->skb = NULL;
3143 pkt_dev->stopped_at = ktime_get();
3144 pkt_dev->running = 0;
3145
3146 show_results(pkt_dev, nr_frags);
3147
3148 return 0;
3149 }
3150
3151 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3152 {
3153 struct pktgen_dev *pkt_dev, *best = NULL;
3154
3155 if_lock(t);
3156
3157 list_for_each_entry(pkt_dev, &t->if_list, list) {
3158 if (!pkt_dev->running)
3159 continue;
3160 if (best == NULL)
3161 best = pkt_dev;
3162 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0)
3163 best = pkt_dev;
3164 }
3165 if_unlock(t);
3166 return best;
3167 }
3168
3169 static void pktgen_stop(struct pktgen_thread *t)
3170 {
3171 struct pktgen_dev *pkt_dev;
3172
3173 func_enter();
3174
3175 if_lock(t);
3176
3177 list_for_each_entry(pkt_dev, &t->if_list, list) {
3178 pktgen_stop_device(pkt_dev);
3179 }
3180
3181 if_unlock(t);
3182 }
3183
3184 /*
3185 * one of our devices needs to be removed - find it
3186 * and remove it
3187 */
3188 static void pktgen_rem_one_if(struct pktgen_thread *t)
3189 {
3190 struct list_head *q, *n;
3191 struct pktgen_dev *cur;
3192
3193 func_enter();
3194
3195 if_lock(t);
3196
3197 list_for_each_safe(q, n, &t->if_list) {
3198 cur = list_entry(q, struct pktgen_dev, list);
3199
3200 if (!cur->removal_mark)
3201 continue;
3202
3203 kfree_skb(cur->skb);
3204 cur->skb = NULL;
3205
3206 pktgen_remove_device(t, cur);
3207
3208 break;
3209 }
3210
3211 if_unlock(t);
3212 }
3213
3214 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3215 {
3216 struct list_head *q, *n;
3217 struct pktgen_dev *cur;
3218
3219 func_enter();
3220
3221 /* Remove all devices, free mem */
3222
3223 if_lock(t);
3224
3225 list_for_each_safe(q, n, &t->if_list) {
3226 cur = list_entry(q, struct pktgen_dev, list);
3227
3228 kfree_skb(cur->skb);
3229 cur->skb = NULL;
3230
3231 pktgen_remove_device(t, cur);
3232 }
3233
3234 if_unlock(t);
3235 }
3236
3237 static void pktgen_rem_thread(struct pktgen_thread *t)
3238 {
3239 /* Remove from the thread list */
3240 remove_proc_entry(t->tsk->comm, t->net->proc_dir);
3241 }
3242
3243 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3244 {
3245 ktime_t idle_start = ktime_get();
3246 schedule();
3247 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3248 }
3249
3250 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3251 {
3252 ktime_t idle_start = ktime_get();
3253
3254 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3255 if (signal_pending(current))
3256 break;
3257
3258 if (need_resched())
3259 pktgen_resched(pkt_dev);
3260 else
3261 cpu_relax();
3262 }
3263 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3264 }
3265
3266 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3267 {
3268 struct net_device *odev = pkt_dev->odev;
3269 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3270 = odev->netdev_ops->ndo_start_xmit;
3271 struct netdev_queue *txq;
3272 u16 queue_map;
3273 int ret;
3274
3275 /* If device is offline, then don't send */
3276 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3277 pktgen_stop_device(pkt_dev);
3278 return;
3279 }
3280
3281 /* This is max DELAY, this has special meaning of
3282 * "never transmit"
3283 */
3284 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3285 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
3286 return;
3287 }
3288
3289 /* If no skb or clone count exhausted then get new one */
3290 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3291 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3292 /* build a new pkt */
3293 kfree_skb(pkt_dev->skb);
3294
3295 pkt_dev->skb = fill_packet(odev, pkt_dev);
3296 if (pkt_dev->skb == NULL) {
3297 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3298 schedule();
3299 pkt_dev->clone_count--; /* back out increment, OOM */
3300 return;
3301 }
3302 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3303 pkt_dev->allocated_skbs++;
3304 pkt_dev->clone_count = 0; /* reset counter */
3305 }
3306
3307 if (pkt_dev->delay && pkt_dev->last_ok)
3308 spin(pkt_dev, pkt_dev->next_tx);
3309
3310 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3311 txq = netdev_get_tx_queue(odev, queue_map);
3312
3313 __netif_tx_lock_bh(txq);
3314
3315 if (unlikely(netif_xmit_frozen_or_stopped(txq))) {
3316 ret = NETDEV_TX_BUSY;
3317 pkt_dev->last_ok = 0;
3318 goto unlock;
3319 }
3320 atomic_inc(&(pkt_dev->skb->users));
3321 ret = (*xmit)(pkt_dev->skb, odev);
3322
3323 switch (ret) {
3324 case NETDEV_TX_OK:
3325 txq_trans_update(txq);
3326 pkt_dev->last_ok = 1;
3327 pkt_dev->sofar++;
3328 pkt_dev->seq_num++;
3329 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3330 break;
3331 case NET_XMIT_DROP:
3332 case NET_XMIT_CN:
3333 case NET_XMIT_POLICED:
3334 /* skb has been consumed */
3335 pkt_dev->errors++;
3336 break;
3337 default: /* Drivers are not supposed to return other values! */
3338 net_info_ratelimited("%s xmit error: %d\n",
3339 pkt_dev->odevname, ret);
3340 pkt_dev->errors++;
3341 /* fallthru */
3342 case NETDEV_TX_LOCKED:
3343 case NETDEV_TX_BUSY:
3344 /* Retry it next time */
3345 atomic_dec(&(pkt_dev->skb->users));
3346 pkt_dev->last_ok = 0;
3347 }
3348 unlock:
3349 __netif_tx_unlock_bh(txq);
3350
3351 /* If pkt_dev->count is zero, then run forever */
3352 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3353 pktgen_wait_for_skb(pkt_dev);
3354
3355 /* Done with this */
3356 pktgen_stop_device(pkt_dev);
3357 }
3358 }
3359
3360 /*
3361 * Main loop of the thread goes here
3362 */
3363
3364 static int pktgen_thread_worker(void *arg)
3365 {
3366 DEFINE_WAIT(wait);
3367 struct pktgen_thread *t = arg;
3368 struct pktgen_dev *pkt_dev = NULL;
3369 int cpu = t->cpu;
3370
3371 BUG_ON(smp_processor_id() != cpu);
3372
3373 init_waitqueue_head(&t->queue);
3374 complete(&t->start_done);
3375
3376 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3377
3378 set_current_state(TASK_INTERRUPTIBLE);
3379
3380 set_freezable();
3381
3382 while (!kthread_should_stop()) {
3383 pkt_dev = next_to_run(t);
3384
3385 if (unlikely(!pkt_dev && t->control == 0)) {
3386 if (t->net->pktgen_exiting)
3387 break;
3388 wait_event_interruptible_timeout(t->queue,
3389 t->control != 0,
3390 HZ/10);
3391 try_to_freeze();
3392 continue;
3393 }
3394
3395 __set_current_state(TASK_RUNNING);
3396
3397 if (likely(pkt_dev)) {
3398 pktgen_xmit(pkt_dev);
3399
3400 if (need_resched())
3401 pktgen_resched(pkt_dev);
3402 else
3403 cpu_relax();
3404 }
3405
3406 if (t->control & T_STOP) {
3407 pktgen_stop(t);
3408 t->control &= ~(T_STOP);
3409 }
3410
3411 if (t->control & T_RUN) {
3412 pktgen_run(t);
3413 t->control &= ~(T_RUN);
3414 }
3415
3416 if (t->control & T_REMDEVALL) {
3417 pktgen_rem_all_ifs(t);
3418 t->control &= ~(T_REMDEVALL);
3419 }
3420
3421 if (t->control & T_REMDEV) {
3422 pktgen_rem_one_if(t);
3423 t->control &= ~(T_REMDEV);
3424 }
3425
3426 try_to_freeze();
3427
3428 set_current_state(TASK_INTERRUPTIBLE);
3429 }
3430
3431 pr_debug("%s stopping all device\n", t->tsk->comm);
3432 pktgen_stop(t);
3433
3434 pr_debug("%s removing all device\n", t->tsk->comm);
3435 pktgen_rem_all_ifs(t);
3436
3437 pr_debug("%s removing thread\n", t->tsk->comm);
3438 pktgen_rem_thread(t);
3439
3440 /* Wait for kthread_stop */
3441 while (!kthread_should_stop()) {
3442 set_current_state(TASK_INTERRUPTIBLE);
3443 schedule();
3444 }
3445 __set_current_state(TASK_RUNNING);
3446
3447 return 0;
3448 }
3449
3450 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3451 const char *ifname, bool exact)
3452 {
3453 struct pktgen_dev *p, *pkt_dev = NULL;
3454 size_t len = strlen(ifname);
3455
3456 if_lock(t);
3457 list_for_each_entry(p, &t->if_list, list)
3458 if (strncmp(p->odevname, ifname, len) == 0) {
3459 if (p->odevname[len]) {
3460 if (exact || p->odevname[len] != '@')
3461 continue;
3462 }
3463 pkt_dev = p;
3464 break;
3465 }
3466
3467 if_unlock(t);
3468 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3469 return pkt_dev;
3470 }
3471
3472 /*
3473 * Adds a dev at front of if_list.
3474 */
3475
3476 static int add_dev_to_thread(struct pktgen_thread *t,
3477 struct pktgen_dev *pkt_dev)
3478 {
3479 int rv = 0;
3480
3481 if_lock(t);
3482
3483 if (pkt_dev->pg_thread) {
3484 pr_err("ERROR: already assigned to a thread\n");
3485 rv = -EBUSY;
3486 goto out;
3487 }
3488
3489 list_add(&pkt_dev->list, &t->if_list);
3490 pkt_dev->pg_thread = t;
3491 pkt_dev->running = 0;
3492
3493 out:
3494 if_unlock(t);
3495 return rv;
3496 }
3497
3498 /* Called under thread lock */
3499
3500 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3501 {
3502 struct pktgen_dev *pkt_dev;
3503 int err;
3504 int node = cpu_to_node(t->cpu);
3505
3506 /* We don't allow a device to be on several threads */
3507
3508 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND);
3509 if (pkt_dev) {
3510 pr_err("ERROR: interface already used\n");
3511 return -EBUSY;
3512 }
3513
3514 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3515 if (!pkt_dev)
3516 return -ENOMEM;
3517
3518 strcpy(pkt_dev->odevname, ifname);
3519 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3520 node);
3521 if (pkt_dev->flows == NULL) {
3522 kfree(pkt_dev);
3523 return -ENOMEM;
3524 }
3525
3526 pkt_dev->removal_mark = 0;
3527 pkt_dev->nfrags = 0;
3528 pkt_dev->delay = pg_delay_d;
3529 pkt_dev->count = pg_count_d;
3530 pkt_dev->sofar = 0;
3531 pkt_dev->udp_src_min = 9; /* sink port */
3532 pkt_dev->udp_src_max = 9;
3533 pkt_dev->udp_dst_min = 9;
3534 pkt_dev->udp_dst_max = 9;
3535 pkt_dev->vlan_p = 0;
3536 pkt_dev->vlan_cfi = 0;
3537 pkt_dev->vlan_id = 0xffff;
3538 pkt_dev->svlan_p = 0;
3539 pkt_dev->svlan_cfi = 0;
3540 pkt_dev->svlan_id = 0xffff;
3541 pkt_dev->node = -1;
3542
3543 err = pktgen_setup_dev(t->net, pkt_dev, ifname);
3544 if (err)
3545 goto out1;
3546 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3547 pkt_dev->clone_skb = pg_clone_skb_d;
3548
3549 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir,
3550 &pktgen_if_fops, pkt_dev);
3551 if (!pkt_dev->entry) {
3552 pr_err("cannot create %s/%s procfs entry\n",
3553 PG_PROC_DIR, ifname);
3554 err = -EINVAL;
3555 goto out2;
3556 }
3557 #ifdef CONFIG_XFRM
3558 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3559 pkt_dev->ipsproto = IPPROTO_ESP;
3560 #endif
3561
3562 return add_dev_to_thread(t, pkt_dev);
3563 out2:
3564 dev_put(pkt_dev->odev);
3565 out1:
3566 #ifdef CONFIG_XFRM
3567 free_SAs(pkt_dev);
3568 #endif
3569 vfree(pkt_dev->flows);
3570 kfree(pkt_dev);
3571 return err;
3572 }
3573
3574 static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
3575 {
3576 struct pktgen_thread *t;
3577 struct proc_dir_entry *pe;
3578 struct task_struct *p;
3579
3580 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3581 cpu_to_node(cpu));
3582 if (!t) {
3583 pr_err("ERROR: out of memory, can't create new thread\n");
3584 return -ENOMEM;
3585 }
3586
3587 spin_lock_init(&t->if_lock);
3588 t->cpu = cpu;
3589
3590 INIT_LIST_HEAD(&t->if_list);
3591
3592 list_add_tail(&t->th_list, &pn->pktgen_threads);
3593 init_completion(&t->start_done);
3594
3595 p = kthread_create_on_node(pktgen_thread_worker,
3596 t,
3597 cpu_to_node(cpu),
3598 "kpktgend_%d", cpu);
3599 if (IS_ERR(p)) {
3600 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3601 list_del(&t->th_list);
3602 kfree(t);
3603 return PTR_ERR(p);
3604 }
3605 kthread_bind(p, cpu);
3606 t->tsk = p;
3607
3608 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
3609 &pktgen_thread_fops, t);
3610 if (!pe) {
3611 pr_err("cannot create %s/%s procfs entry\n",
3612 PG_PROC_DIR, t->tsk->comm);
3613 kthread_stop(p);
3614 list_del(&t->th_list);
3615 kfree(t);
3616 return -EINVAL;
3617 }
3618
3619 t->net = pn;
3620 wake_up_process(p);
3621 wait_for_completion(&t->start_done);
3622
3623 return 0;
3624 }
3625
3626 /*
3627 * Removes a device from the thread if_list.
3628 */
3629 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3630 struct pktgen_dev *pkt_dev)
3631 {
3632 struct list_head *q, *n;
3633 struct pktgen_dev *p;
3634
3635 list_for_each_safe(q, n, &t->if_list) {
3636 p = list_entry(q, struct pktgen_dev, list);
3637 if (p == pkt_dev)
3638 list_del(&p->list);
3639 }
3640 }
3641
3642 static int pktgen_remove_device(struct pktgen_thread *t,
3643 struct pktgen_dev *pkt_dev)
3644 {
3645 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3646
3647 if (pkt_dev->running) {
3648 pr_warning("WARNING: trying to remove a running interface, stopping it now\n");
3649 pktgen_stop_device(pkt_dev);
3650 }
3651
3652 /* Dis-associate from the interface */
3653
3654 if (pkt_dev->odev) {
3655 dev_put(pkt_dev->odev);
3656 pkt_dev->odev = NULL;
3657 }
3658
3659 /* And update the thread if_list */
3660
3661 _rem_dev_from_if_list(t, pkt_dev);
3662
3663 if (pkt_dev->entry)
3664 proc_remove(pkt_dev->entry);
3665
3666 #ifdef CONFIG_XFRM
3667 free_SAs(pkt_dev);
3668 #endif
3669 vfree(pkt_dev->flows);
3670 if (pkt_dev->page)
3671 put_page(pkt_dev->page);
3672 kfree(pkt_dev);
3673 return 0;
3674 }
3675
3676 static int __net_init pg_net_init(struct net *net)
3677 {
3678 struct pktgen_net *pn = net_generic(net, pg_net_id);
3679 struct proc_dir_entry *pe;
3680 int cpu, ret = 0;
3681
3682 pn->net = net;
3683 INIT_LIST_HEAD(&pn->pktgen_threads);
3684 pn->pktgen_exiting = false;
3685 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net);
3686 if (!pn->proc_dir) {
3687 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR);
3688 return -ENODEV;
3689 }
3690 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops);
3691 if (pe == NULL) {
3692 pr_err("cannot create %s procfs entry\n", PGCTRL);
3693 ret = -EINVAL;
3694 goto remove;
3695 }
3696
3697 for_each_online_cpu(cpu) {
3698 int err;
3699
3700 err = pktgen_create_thread(cpu, pn);
3701 if (err)
3702 pr_warn("Cannot create thread for cpu %d (%d)\n",
3703 cpu, err);
3704 }
3705
3706 if (list_empty(&pn->pktgen_threads)) {
3707 pr_err("Initialization failed for all threads\n");
3708 ret = -ENODEV;
3709 goto remove_entry;
3710 }
3711
3712 return 0;
3713
3714 remove_entry:
3715 remove_proc_entry(PGCTRL, pn->proc_dir);
3716 remove:
3717 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3718 return ret;
3719 }
3720
3721 static void __net_exit pg_net_exit(struct net *net)
3722 {
3723 struct pktgen_net *pn = net_generic(net, pg_net_id);
3724 struct pktgen_thread *t;
3725 struct list_head *q, *n;
3726 LIST_HEAD(list);
3727
3728 /* Stop all interfaces & threads */
3729 pn->pktgen_exiting = true;
3730
3731 mutex_lock(&pktgen_thread_lock);
3732 list_splice_init(&pn->pktgen_threads, &list);
3733 mutex_unlock(&pktgen_thread_lock);
3734
3735 list_for_each_safe(q, n, &list) {
3736 t = list_entry(q, struct pktgen_thread, th_list);
3737 list_del(&t->th_list);
3738 kthread_stop(t->tsk);
3739 kfree(t);
3740 }
3741
3742 remove_proc_entry(PGCTRL, pn->proc_dir);
3743 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3744 }
3745
3746 static struct pernet_operations pg_net_ops = {
3747 .init = pg_net_init,
3748 .exit = pg_net_exit,
3749 .id = &pg_net_id,
3750 .size = sizeof(struct pktgen_net),
3751 };
3752
3753 static int __init pg_init(void)
3754 {
3755 int ret = 0;
3756
3757 pr_info("%s", version);
3758 ret = register_pernet_subsys(&pg_net_ops);
3759 if (ret)
3760 return ret;
3761 ret = register_netdevice_notifier(&pktgen_notifier_block);
3762 if (ret)
3763 unregister_pernet_subsys(&pg_net_ops);
3764
3765 return ret;
3766 }
3767
3768 static void __exit pg_cleanup(void)
3769 {
3770 unregister_netdevice_notifier(&pktgen_notifier_block);
3771 unregister_pernet_subsys(&pg_net_ops);
3772 }
3773
3774 module_init(pg_init);
3775 module_exit(pg_cleanup);
3776
3777 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3778 MODULE_DESCRIPTION("Packet Generator tool");
3779 MODULE_LICENSE("GPL");
3780 MODULE_VERSION(VERSION);
3781 module_param(pg_count_d, int, 0);
3782 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3783 module_param(pg_delay_d, int, 0);
3784 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3785 module_param(pg_clone_skb_d, int, 0);
3786 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3787 module_param(debug, int, 0);
3788 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
Linux kernel - Deliverables
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