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pktgen: add needed include file
[linux/fpc-iii.git] / net / core / pktgen.c
blob261357a663001ccf98a92ba5f6d0f6ad141c7ce3
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 #endif
393 char result[512];
394 };
395
396 struct pktgen_hdr {
397 __be32 pgh_magic;
398 __be32 seq_num;
399 __be32 tv_sec;
400 __be32 tv_usec;
401 };
402
403
404 static int pg_net_id __read_mostly;
405
406 struct pktgen_net {
407 struct net *net;
408 struct proc_dir_entry *proc_dir;
409 struct list_head pktgen_threads;
410 bool pktgen_exiting;
411 };
412
413 struct pktgen_thread {
414 spinlock_t if_lock; /* for list of devices */
415 struct list_head if_list; /* All device here */
416 struct list_head th_list;
417 struct task_struct *tsk;
418 char result[512];
419
420 /* Field for thread to receive "posted" events terminate,
421 stop ifs etc. */
422
423 u32 control;
424 int cpu;
425
426 wait_queue_head_t queue;
427 struct completion start_done;
428 struct pktgen_net *net;
429 };
430
431 #define REMOVE 1
432 #define FIND 0
433
434 static const char version[] =
435 "Packet Generator for packet performance testing. "
436 "Version: " VERSION "\n";
437
438 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
439 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
440 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
441 const char *ifname, bool exact);
442 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
443 static void pktgen_run_all_threads(struct pktgen_net *pn);
444 static void pktgen_reset_all_threads(struct pktgen_net *pn);
445 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn);
446
447 static void pktgen_stop(struct pktgen_thread *t);
448 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
449
450 /* Module parameters, defaults. */
451 static int pg_count_d __read_mostly = 1000;
452 static int pg_delay_d __read_mostly;
453 static int pg_clone_skb_d __read_mostly;
454 static int debug __read_mostly;
455
456 static DEFINE_MUTEX(pktgen_thread_lock);
457
458 static struct notifier_block pktgen_notifier_block = {
459 .notifier_call = pktgen_device_event,
460 };
461
462 /*
463 * /proc handling functions
464 *
465 */
466
467 static int pgctrl_show(struct seq_file *seq, void *v)
468 {
469 seq_puts(seq, version);
470 return 0;
471 }
472
473 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
474 size_t count, loff_t *ppos)
475 {
476 int err = 0;
477 char data[128];
478 struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
479
480 if (!capable(CAP_NET_ADMIN)) {
481 err = -EPERM;
482 goto out;
483 }
484
485 if (count > sizeof(data))
486 count = sizeof(data);
487
488 if (copy_from_user(data, buf, count)) {
489 err = -EFAULT;
490 goto out;
491 }
492 data[count - 1] = 0; /* Make string */
493
494 if (!strcmp(data, "stop"))
495 pktgen_stop_all_threads_ifs(pn);
496
497 else if (!strcmp(data, "start"))
498 pktgen_run_all_threads(pn);
499
500 else if (!strcmp(data, "reset"))
501 pktgen_reset_all_threads(pn);
502
503 else
504 pr_warning("Unknown command: %s\n", data);
505
506 err = count;
507
508 out:
509 return err;
510 }
511
512 static int pgctrl_open(struct inode *inode, struct file *file)
513 {
514 return single_open(file, pgctrl_show, PDE_DATA(inode));
515 }
516
517 static const struct file_operations pktgen_fops = {
518 .owner = THIS_MODULE,
519 .open = pgctrl_open,
520 .read = seq_read,
521 .llseek = seq_lseek,
522 .write = pgctrl_write,
523 .release = single_release,
524 };
525
526 static int pktgen_if_show(struct seq_file *seq, void *v)
527 {
528 const struct pktgen_dev *pkt_dev = seq->private;
529 ktime_t stopped;
530 u64 idle;
531
532 seq_printf(seq,
533 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
534 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
535 pkt_dev->max_pkt_size);
536
537 seq_printf(seq,
538 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
539 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
540 pkt_dev->clone_skb, pkt_dev->odevname);
541
542 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
543 pkt_dev->lflow);
544
545 seq_printf(seq,
546 " queue_map_min: %u queue_map_max: %u\n",
547 pkt_dev->queue_map_min,
548 pkt_dev->queue_map_max);
549
550 if (pkt_dev->skb_priority)
551 seq_printf(seq, " skb_priority: %u\n",
552 pkt_dev->skb_priority);
553
554 if (pkt_dev->flags & F_IPV6) {
555 seq_printf(seq,
556 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
557 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
558 &pkt_dev->in6_saddr,
559 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
560 &pkt_dev->in6_daddr,
561 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
562 } else {
563 seq_printf(seq,
564 " dst_min: %s dst_max: %s\n",
565 pkt_dev->dst_min, pkt_dev->dst_max);
566 seq_printf(seq,
567 " src_min: %s src_max: %s\n",
568 pkt_dev->src_min, pkt_dev->src_max);
569 }
570
571 seq_puts(seq, " src_mac: ");
572
573 seq_printf(seq, "%pM ",
574 is_zero_ether_addr(pkt_dev->src_mac) ?
575 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
576
577 seq_printf(seq, "dst_mac: ");
578 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
579
580 seq_printf(seq,
581 " udp_src_min: %d udp_src_max: %d"
582 " udp_dst_min: %d udp_dst_max: %d\n",
583 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
584 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
585
586 seq_printf(seq,
587 " src_mac_count: %d dst_mac_count: %d\n",
588 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
589
590 if (pkt_dev->nr_labels) {
591 unsigned int i;
592 seq_printf(seq, " mpls: ");
593 for (i = 0; i < pkt_dev->nr_labels; i++)
594 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
595 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
596 }
597
598 if (pkt_dev->vlan_id != 0xffff)
599 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
600 pkt_dev->vlan_id, pkt_dev->vlan_p,
601 pkt_dev->vlan_cfi);
602
603 if (pkt_dev->svlan_id != 0xffff)
604 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
605 pkt_dev->svlan_id, pkt_dev->svlan_p,
606 pkt_dev->svlan_cfi);
607
608 if (pkt_dev->tos)
609 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
610
611 if (pkt_dev->traffic_class)
612 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
613
614 if (pkt_dev->node >= 0)
615 seq_printf(seq, " node: %d\n", pkt_dev->node);
616
617 seq_printf(seq, " Flags: ");
618
619 if (pkt_dev->flags & F_IPV6)
620 seq_printf(seq, "IPV6 ");
621
622 if (pkt_dev->flags & F_IPSRC_RND)
623 seq_printf(seq, "IPSRC_RND ");
624
625 if (pkt_dev->flags & F_IPDST_RND)
626 seq_printf(seq, "IPDST_RND ");
627
628 if (pkt_dev->flags & F_TXSIZE_RND)
629 seq_printf(seq, "TXSIZE_RND ");
630
631 if (pkt_dev->flags & F_UDPSRC_RND)
632 seq_printf(seq, "UDPSRC_RND ");
633
634 if (pkt_dev->flags & F_UDPDST_RND)
635 seq_printf(seq, "UDPDST_RND ");
636
637 if (pkt_dev->flags & F_UDPCSUM)
638 seq_printf(seq, "UDPCSUM ");
639
640 if (pkt_dev->flags & F_MPLS_RND)
641 seq_printf(seq, "MPLS_RND ");
642
643 if (pkt_dev->flags & F_QUEUE_MAP_RND)
644 seq_printf(seq, "QUEUE_MAP_RND ");
645
646 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
647 seq_printf(seq, "QUEUE_MAP_CPU ");
648
649 if (pkt_dev->cflows) {
650 if (pkt_dev->flags & F_FLOW_SEQ)
651 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
652 else
653 seq_printf(seq, "FLOW_RND ");
654 }
655
656 #ifdef CONFIG_XFRM
657 if (pkt_dev->flags & F_IPSEC_ON)
658 seq_printf(seq, "IPSEC ");
659 #endif
660
661 if (pkt_dev->flags & F_MACSRC_RND)
662 seq_printf(seq, "MACSRC_RND ");
663
664 if (pkt_dev->flags & F_MACDST_RND)
665 seq_printf(seq, "MACDST_RND ");
666
667 if (pkt_dev->flags & F_VID_RND)
668 seq_printf(seq, "VID_RND ");
669
670 if (pkt_dev->flags & F_SVID_RND)
671 seq_printf(seq, "SVID_RND ");
672
673 if (pkt_dev->flags & F_NODE)
674 seq_printf(seq, "NODE_ALLOC ");
675
676 seq_puts(seq, "\n");
677
678 /* not really stopped, more like last-running-at */
679 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at;
680 idle = pkt_dev->idle_acc;
681 do_div(idle, NSEC_PER_USEC);
682
683 seq_printf(seq,
684 "Current:\n pkts-sofar: %llu errors: %llu\n",
685 (unsigned long long)pkt_dev->sofar,
686 (unsigned long long)pkt_dev->errors);
687
688 seq_printf(seq,
689 " started: %lluus stopped: %lluus idle: %lluus\n",
690 (unsigned long long) ktime_to_us(pkt_dev->started_at),
691 (unsigned long long) ktime_to_us(stopped),
692 (unsigned long long) idle);
693
694 seq_printf(seq,
695 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
696 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
697 pkt_dev->cur_src_mac_offset);
698
699 if (pkt_dev->flags & F_IPV6) {
700 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
701 &pkt_dev->cur_in6_saddr,
702 &pkt_dev->cur_in6_daddr);
703 } else
704 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n",
705 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
706
707 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
708 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
709
710 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
711
712 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
713
714 if (pkt_dev->result[0])
715 seq_printf(seq, "Result: %s\n", pkt_dev->result);
716 else
717 seq_printf(seq, "Result: Idle\n");
718
719 return 0;
720 }
721
722
723 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
724 __u32 *num)
725 {
726 int i = 0;
727 *num = 0;
728
729 for (; i < maxlen; i++) {
730 int value;
731 char c;
732 *num <<= 4;
733 if (get_user(c, &user_buffer[i]))
734 return -EFAULT;
735 value = hex_to_bin(c);
736 if (value >= 0)
737 *num |= value;
738 else
739 break;
740 }
741 return i;
742 }
743
744 static int count_trail_chars(const char __user * user_buffer,
745 unsigned int maxlen)
746 {
747 int i;
748
749 for (i = 0; i < maxlen; i++) {
750 char c;
751 if (get_user(c, &user_buffer[i]))
752 return -EFAULT;
753 switch (c) {
754 case '\"':
755 case '\n':
756 case '\r':
757 case '\t':
758 case ' ':
759 case '=':
760 break;
761 default:
762 goto done;
763 }
764 }
765 done:
766 return i;
767 }
768
769 static long num_arg(const char __user *user_buffer, unsigned long maxlen,
770 unsigned long *num)
771 {
772 int i;
773 *num = 0;
774
775 for (i = 0; i < maxlen; i++) {
776 char c;
777 if (get_user(c, &user_buffer[i]))
778 return -EFAULT;
779 if ((c >= '0') && (c <= '9')) {
780 *num *= 10;
781 *num += c - '0';
782 } else
783 break;
784 }
785 return i;
786 }
787
788 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
789 {
790 int i;
791
792 for (i = 0; i < maxlen; i++) {
793 char c;
794 if (get_user(c, &user_buffer[i]))
795 return -EFAULT;
796 switch (c) {
797 case '\"':
798 case '\n':
799 case '\r':
800 case '\t':
801 case ' ':
802 goto done_str;
803 break;
804 default:
805 break;
806 }
807 }
808 done_str:
809 return i;
810 }
811
812 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
813 {
814 unsigned int n = 0;
815 char c;
816 ssize_t i = 0;
817 int len;
818
819 pkt_dev->nr_labels = 0;
820 do {
821 __u32 tmp;
822 len = hex32_arg(&buffer[i], 8, &tmp);
823 if (len <= 0)
824 return len;
825 pkt_dev->labels[n] = htonl(tmp);
826 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
827 pkt_dev->flags |= F_MPLS_RND;
828 i += len;
829 if (get_user(c, &buffer[i]))
830 return -EFAULT;
831 i++;
832 n++;
833 if (n >= MAX_MPLS_LABELS)
834 return -E2BIG;
835 } while (c == ',');
836
837 pkt_dev->nr_labels = n;
838 return i;
839 }
840
841 static ssize_t pktgen_if_write(struct file *file,
842 const char __user * user_buffer, size_t count,
843 loff_t * offset)
844 {
845 struct seq_file *seq = file->private_data;
846 struct pktgen_dev *pkt_dev = seq->private;
847 int i, max, len;
848 char name[16], valstr[32];
849 unsigned long value = 0;
850 char *pg_result = NULL;
851 int tmp = 0;
852 char buf[128];
853
854 pg_result = &(pkt_dev->result[0]);
855
856 if (count < 1) {
857 pr_warning("wrong command format\n");
858 return -EINVAL;
859 }
860
861 max = count;
862 tmp = count_trail_chars(user_buffer, max);
863 if (tmp < 0) {
864 pr_warning("illegal format\n");
865 return tmp;
866 }
867 i = tmp;
868
869 /* Read variable name */
870
871 len = strn_len(&user_buffer[i], sizeof(name) - 1);
872 if (len < 0)
873 return len;
874
875 memset(name, 0, sizeof(name));
876 if (copy_from_user(name, &user_buffer[i], len))
877 return -EFAULT;
878 i += len;
879
880 max = count - i;
881 len = count_trail_chars(&user_buffer[i], max);
882 if (len < 0)
883 return len;
884
885 i += len;
886
887 if (debug) {
888 size_t copy = min_t(size_t, count, 1023);
889 char tb[copy + 1];
890 if (copy_from_user(tb, user_buffer, copy))
891 return -EFAULT;
892 tb[copy] = 0;
893 pr_debug("%s,%lu buffer -:%s:-\n",
894 name, (unsigned long)count, tb);
895 }
896
897 if (!strcmp(name, "min_pkt_size")) {
898 len = num_arg(&user_buffer[i], 10, &value);
899 if (len < 0)
900 return len;
901
902 i += len;
903 if (value < 14 + 20 + 8)
904 value = 14 + 20 + 8;
905 if (value != pkt_dev->min_pkt_size) {
906 pkt_dev->min_pkt_size = value;
907 pkt_dev->cur_pkt_size = value;
908 }
909 sprintf(pg_result, "OK: min_pkt_size=%u",
910 pkt_dev->min_pkt_size);
911 return count;
912 }
913
914 if (!strcmp(name, "max_pkt_size")) {
915 len = num_arg(&user_buffer[i], 10, &value);
916 if (len < 0)
917 return len;
918
919 i += len;
920 if (value < 14 + 20 + 8)
921 value = 14 + 20 + 8;
922 if (value != pkt_dev->max_pkt_size) {
923 pkt_dev->max_pkt_size = value;
924 pkt_dev->cur_pkt_size = value;
925 }
926 sprintf(pg_result, "OK: max_pkt_size=%u",
927 pkt_dev->max_pkt_size);
928 return count;
929 }
930
931 /* Shortcut for min = max */
932
933 if (!strcmp(name, "pkt_size")) {
934 len = num_arg(&user_buffer[i], 10, &value);
935 if (len < 0)
936 return len;
937
938 i += len;
939 if (value < 14 + 20 + 8)
940 value = 14 + 20 + 8;
941 if (value != pkt_dev->min_pkt_size) {
942 pkt_dev->min_pkt_size = value;
943 pkt_dev->max_pkt_size = value;
944 pkt_dev->cur_pkt_size = value;
945 }
946 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
947 return count;
948 }
949
950 if (!strcmp(name, "debug")) {
951 len = num_arg(&user_buffer[i], 10, &value);
952 if (len < 0)
953 return len;
954
955 i += len;
956 debug = value;
957 sprintf(pg_result, "OK: debug=%u", debug);
958 return count;
959 }
960
961 if (!strcmp(name, "frags")) {
962 len = num_arg(&user_buffer[i], 10, &value);
963 if (len < 0)
964 return len;
965
966 i += len;
967 pkt_dev->nfrags = value;
968 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
969 return count;
970 }
971 if (!strcmp(name, "delay")) {
972 len = num_arg(&user_buffer[i], 10, &value);
973 if (len < 0)
974 return len;
975
976 i += len;
977 if (value == 0x7FFFFFFF)
978 pkt_dev->delay = ULLONG_MAX;
979 else
980 pkt_dev->delay = (u64)value;
981
982 sprintf(pg_result, "OK: delay=%llu",
983 (unsigned long long) pkt_dev->delay);
984 return count;
985 }
986 if (!strcmp(name, "rate")) {
987 len = num_arg(&user_buffer[i], 10, &value);
988 if (len < 0)
989 return len;
990
991 i += len;
992 if (!value)
993 return len;
994 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
995 if (debug)
996 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
997
998 sprintf(pg_result, "OK: rate=%lu", value);
999 return count;
1000 }
1001 if (!strcmp(name, "ratep")) {
1002 len = num_arg(&user_buffer[i], 10, &value);
1003 if (len < 0)
1004 return len;
1005
1006 i += len;
1007 if (!value)
1008 return len;
1009 pkt_dev->delay = NSEC_PER_SEC/value;
1010 if (debug)
1011 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1012
1013 sprintf(pg_result, "OK: rate=%lu", value);
1014 return count;
1015 }
1016 if (!strcmp(name, "udp_src_min")) {
1017 len = num_arg(&user_buffer[i], 10, &value);
1018 if (len < 0)
1019 return len;
1020
1021 i += len;
1022 if (value != pkt_dev->udp_src_min) {
1023 pkt_dev->udp_src_min = value;
1024 pkt_dev->cur_udp_src = value;
1025 }
1026 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1027 return count;
1028 }
1029 if (!strcmp(name, "udp_dst_min")) {
1030 len = num_arg(&user_buffer[i], 10, &value);
1031 if (len < 0)
1032 return len;
1033
1034 i += len;
1035 if (value != pkt_dev->udp_dst_min) {
1036 pkt_dev->udp_dst_min = value;
1037 pkt_dev->cur_udp_dst = value;
1038 }
1039 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1040 return count;
1041 }
1042 if (!strcmp(name, "udp_src_max")) {
1043 len = num_arg(&user_buffer[i], 10, &value);
1044 if (len < 0)
1045 return len;
1046
1047 i += len;
1048 if (value != pkt_dev->udp_src_max) {
1049 pkt_dev->udp_src_max = value;
1050 pkt_dev->cur_udp_src = value;
1051 }
1052 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1053 return count;
1054 }
1055 if (!strcmp(name, "udp_dst_max")) {
1056 len = num_arg(&user_buffer[i], 10, &value);
1057 if (len < 0)
1058 return len;
1059
1060 i += len;
1061 if (value != pkt_dev->udp_dst_max) {
1062 pkt_dev->udp_dst_max = value;
1063 pkt_dev->cur_udp_dst = value;
1064 }
1065 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1066 return count;
1067 }
1068 if (!strcmp(name, "clone_skb")) {
1069 len = num_arg(&user_buffer[i], 10, &value);
1070 if (len < 0)
1071 return len;
1072 if ((value > 0) &&
1073 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1074 return -ENOTSUPP;
1075 i += len;
1076 pkt_dev->clone_skb = value;
1077
1078 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1079 return count;
1080 }
1081 if (!strcmp(name, "count")) {
1082 len = num_arg(&user_buffer[i], 10, &value);
1083 if (len < 0)
1084 return len;
1085
1086 i += len;
1087 pkt_dev->count = value;
1088 sprintf(pg_result, "OK: count=%llu",
1089 (unsigned long long)pkt_dev->count);
1090 return count;
1091 }
1092 if (!strcmp(name, "src_mac_count")) {
1093 len = num_arg(&user_buffer[i], 10, &value);
1094 if (len < 0)
1095 return len;
1096
1097 i += len;
1098 if (pkt_dev->src_mac_count != value) {
1099 pkt_dev->src_mac_count = value;
1100 pkt_dev->cur_src_mac_offset = 0;
1101 }
1102 sprintf(pg_result, "OK: src_mac_count=%d",
1103 pkt_dev->src_mac_count);
1104 return count;
1105 }
1106 if (!strcmp(name, "dst_mac_count")) {
1107 len = num_arg(&user_buffer[i], 10, &value);
1108 if (len < 0)
1109 return len;
1110
1111 i += len;
1112 if (pkt_dev->dst_mac_count != value) {
1113 pkt_dev->dst_mac_count = value;
1114 pkt_dev->cur_dst_mac_offset = 0;
1115 }
1116 sprintf(pg_result, "OK: dst_mac_count=%d",
1117 pkt_dev->dst_mac_count);
1118 return count;
1119 }
1120 if (!strcmp(name, "node")) {
1121 len = num_arg(&user_buffer[i], 10, &value);
1122 if (len < 0)
1123 return len;
1124
1125 i += len;
1126
1127 if (node_possible(value)) {
1128 pkt_dev->node = value;
1129 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1130 if (pkt_dev->page) {
1131 put_page(pkt_dev->page);
1132 pkt_dev->page = NULL;
1133 }
1134 }
1135 else
1136 sprintf(pg_result, "ERROR: node not possible");
1137 return count;
1138 }
1139 if (!strcmp(name, "flag")) {
1140 char f[32];
1141 memset(f, 0, 32);
1142 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1143 if (len < 0)
1144 return len;
1145
1146 if (copy_from_user(f, &user_buffer[i], len))
1147 return -EFAULT;
1148 i += len;
1149 if (strcmp(f, "IPSRC_RND") == 0)
1150 pkt_dev->flags |= F_IPSRC_RND;
1151
1152 else if (strcmp(f, "!IPSRC_RND") == 0)
1153 pkt_dev->flags &= ~F_IPSRC_RND;
1154
1155 else if (strcmp(f, "TXSIZE_RND") == 0)
1156 pkt_dev->flags |= F_TXSIZE_RND;
1157
1158 else if (strcmp(f, "!TXSIZE_RND") == 0)
1159 pkt_dev->flags &= ~F_TXSIZE_RND;
1160
1161 else if (strcmp(f, "IPDST_RND") == 0)
1162 pkt_dev->flags |= F_IPDST_RND;
1163
1164 else if (strcmp(f, "!IPDST_RND") == 0)
1165 pkt_dev->flags &= ~F_IPDST_RND;
1166
1167 else if (strcmp(f, "UDPSRC_RND") == 0)
1168 pkt_dev->flags |= F_UDPSRC_RND;
1169
1170 else if (strcmp(f, "!UDPSRC_RND") == 0)
1171 pkt_dev->flags &= ~F_UDPSRC_RND;
1172
1173 else if (strcmp(f, "UDPDST_RND") == 0)
1174 pkt_dev->flags |= F_UDPDST_RND;
1175
1176 else if (strcmp(f, "!UDPDST_RND") == 0)
1177 pkt_dev->flags &= ~F_UDPDST_RND;
1178
1179 else if (strcmp(f, "MACSRC_RND") == 0)
1180 pkt_dev->flags |= F_MACSRC_RND;
1181
1182 else if (strcmp(f, "!MACSRC_RND") == 0)
1183 pkt_dev->flags &= ~F_MACSRC_RND;
1184
1185 else if (strcmp(f, "MACDST_RND") == 0)
1186 pkt_dev->flags |= F_MACDST_RND;
1187
1188 else if (strcmp(f, "!MACDST_RND") == 0)
1189 pkt_dev->flags &= ~F_MACDST_RND;
1190
1191 else if (strcmp(f, "MPLS_RND") == 0)
1192 pkt_dev->flags |= F_MPLS_RND;
1193
1194 else if (strcmp(f, "!MPLS_RND") == 0)
1195 pkt_dev->flags &= ~F_MPLS_RND;
1196
1197 else if (strcmp(f, "VID_RND") == 0)
1198 pkt_dev->flags |= F_VID_RND;
1199
1200 else if (strcmp(f, "!VID_RND") == 0)
1201 pkt_dev->flags &= ~F_VID_RND;
1202
1203 else if (strcmp(f, "SVID_RND") == 0)
1204 pkt_dev->flags |= F_SVID_RND;
1205
1206 else if (strcmp(f, "!SVID_RND") == 0)
1207 pkt_dev->flags &= ~F_SVID_RND;
1208
1209 else if (strcmp(f, "FLOW_SEQ") == 0)
1210 pkt_dev->flags |= F_FLOW_SEQ;
1211
1212 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1213 pkt_dev->flags |= F_QUEUE_MAP_RND;
1214
1215 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1216 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1217
1218 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1219 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1220
1221 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1222 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1223 #ifdef CONFIG_XFRM
1224 else if (strcmp(f, "IPSEC") == 0)
1225 pkt_dev->flags |= F_IPSEC_ON;
1226 #endif
1227
1228 else if (strcmp(f, "!IPV6") == 0)
1229 pkt_dev->flags &= ~F_IPV6;
1230
1231 else if (strcmp(f, "NODE_ALLOC") == 0)
1232 pkt_dev->flags |= F_NODE;
1233
1234 else if (strcmp(f, "!NODE_ALLOC") == 0)
1235 pkt_dev->flags &= ~F_NODE;
1236
1237 else if (strcmp(f, "UDPCSUM") == 0)
1238 pkt_dev->flags |= F_UDPCSUM;
1239
1240 else if (strcmp(f, "!UDPCSUM") == 0)
1241 pkt_dev->flags &= ~F_UDPCSUM;
1242
1243 else {
1244 sprintf(pg_result,
1245 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1246 f,
1247 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1248 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n");
1249 return count;
1250 }
1251 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1252 return count;
1253 }
1254 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1255 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1256 if (len < 0)
1257 return len;
1258
1259 if (copy_from_user(buf, &user_buffer[i], len))
1260 return -EFAULT;
1261 buf[len] = 0;
1262 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1263 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1264 strncpy(pkt_dev->dst_min, buf, len);
1265 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1266 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1267 }
1268 if (debug)
1269 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
1270 i += len;
1271 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1272 return count;
1273 }
1274 if (!strcmp(name, "dst_max")) {
1275 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1276 if (len < 0)
1277 return len;
1278
1279
1280 if (copy_from_user(buf, &user_buffer[i], len))
1281 return -EFAULT;
1282
1283 buf[len] = 0;
1284 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1285 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1286 strncpy(pkt_dev->dst_max, buf, len);
1287 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1288 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1289 }
1290 if (debug)
1291 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
1292 i += len;
1293 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1294 return count;
1295 }
1296 if (!strcmp(name, "dst6")) {
1297 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1298 if (len < 0)
1299 return len;
1300
1301 pkt_dev->flags |= F_IPV6;
1302
1303 if (copy_from_user(buf, &user_buffer[i], len))
1304 return -EFAULT;
1305 buf[len] = 0;
1306
1307 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
1308 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1309
1310 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1311
1312 if (debug)
1313 pr_debug("dst6 set to: %s\n", buf);
1314
1315 i += len;
1316 sprintf(pg_result, "OK: dst6=%s", buf);
1317 return count;
1318 }
1319 if (!strcmp(name, "dst6_min")) {
1320 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1321 if (len < 0)
1322 return len;
1323
1324 pkt_dev->flags |= F_IPV6;
1325
1326 if (copy_from_user(buf, &user_buffer[i], len))
1327 return -EFAULT;
1328 buf[len] = 0;
1329
1330 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
1331 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1332
1333 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
1334 if (debug)
1335 pr_debug("dst6_min set to: %s\n", buf);
1336
1337 i += len;
1338 sprintf(pg_result, "OK: dst6_min=%s", buf);
1339 return count;
1340 }
1341 if (!strcmp(name, "dst6_max")) {
1342 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1343 if (len < 0)
1344 return len;
1345
1346 pkt_dev->flags |= F_IPV6;
1347
1348 if (copy_from_user(buf, &user_buffer[i], len))
1349 return -EFAULT;
1350 buf[len] = 0;
1351
1352 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
1353 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1354
1355 if (debug)
1356 pr_debug("dst6_max set to: %s\n", buf);
1357
1358 i += len;
1359 sprintf(pg_result, "OK: dst6_max=%s", buf);
1360 return count;
1361 }
1362 if (!strcmp(name, "src6")) {
1363 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1364 if (len < 0)
1365 return len;
1366
1367 pkt_dev->flags |= F_IPV6;
1368
1369 if (copy_from_user(buf, &user_buffer[i], len))
1370 return -EFAULT;
1371 buf[len] = 0;
1372
1373 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
1374 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1375
1376 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1377
1378 if (debug)
1379 pr_debug("src6 set to: %s\n", buf);
1380
1381 i += len;
1382 sprintf(pg_result, "OK: src6=%s", buf);
1383 return count;
1384 }
1385 if (!strcmp(name, "src_min")) {
1386 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1387 if (len < 0)
1388 return len;
1389
1390 if (copy_from_user(buf, &user_buffer[i], len))
1391 return -EFAULT;
1392 buf[len] = 0;
1393 if (strcmp(buf, pkt_dev->src_min) != 0) {
1394 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1395 strncpy(pkt_dev->src_min, buf, len);
1396 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1397 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1398 }
1399 if (debug)
1400 pr_debug("src_min set to: %s\n", pkt_dev->src_min);
1401 i += len;
1402 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1403 return count;
1404 }
1405 if (!strcmp(name, "src_max")) {
1406 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1407 if (len < 0)
1408 return len;
1409
1410 if (copy_from_user(buf, &user_buffer[i], len))
1411 return -EFAULT;
1412 buf[len] = 0;
1413 if (strcmp(buf, pkt_dev->src_max) != 0) {
1414 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1415 strncpy(pkt_dev->src_max, buf, len);
1416 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1417 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1418 }
1419 if (debug)
1420 pr_debug("src_max set to: %s\n", pkt_dev->src_max);
1421 i += len;
1422 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1423 return count;
1424 }
1425 if (!strcmp(name, "dst_mac")) {
1426 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1427 if (len < 0)
1428 return len;
1429
1430 memset(valstr, 0, sizeof(valstr));
1431 if (copy_from_user(valstr, &user_buffer[i], len))
1432 return -EFAULT;
1433
1434 if (!mac_pton(valstr, pkt_dev->dst_mac))
1435 return -EINVAL;
1436 /* Set up Dest MAC */
1437 memcpy(&pkt_dev->hh[0], pkt_dev->dst_mac, ETH_ALEN);
1438
1439 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1440 return count;
1441 }
1442 if (!strcmp(name, "src_mac")) {
1443 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1444 if (len < 0)
1445 return len;
1446
1447 memset(valstr, 0, sizeof(valstr));
1448 if (copy_from_user(valstr, &user_buffer[i], len))
1449 return -EFAULT;
1450
1451 if (!mac_pton(valstr, pkt_dev->src_mac))
1452 return -EINVAL;
1453 /* Set up Src MAC */
1454 memcpy(&pkt_dev->hh[6], pkt_dev->src_mac, ETH_ALEN);
1455
1456 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1457 return count;
1458 }
1459
1460 if (!strcmp(name, "clear_counters")) {
1461 pktgen_clear_counters(pkt_dev);
1462 sprintf(pg_result, "OK: Clearing counters.\n");
1463 return count;
1464 }
1465
1466 if (!strcmp(name, "flows")) {
1467 len = num_arg(&user_buffer[i], 10, &value);
1468 if (len < 0)
1469 return len;
1470
1471 i += len;
1472 if (value > MAX_CFLOWS)
1473 value = MAX_CFLOWS;
1474
1475 pkt_dev->cflows = value;
1476 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1477 return count;
1478 }
1479
1480 if (!strcmp(name, "flowlen")) {
1481 len = num_arg(&user_buffer[i], 10, &value);
1482 if (len < 0)
1483 return len;
1484
1485 i += len;
1486 pkt_dev->lflow = value;
1487 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1488 return count;
1489 }
1490
1491 if (!strcmp(name, "queue_map_min")) {
1492 len = num_arg(&user_buffer[i], 5, &value);
1493 if (len < 0)
1494 return len;
1495
1496 i += len;
1497 pkt_dev->queue_map_min = value;
1498 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1499 return count;
1500 }
1501
1502 if (!strcmp(name, "queue_map_max")) {
1503 len = num_arg(&user_buffer[i], 5, &value);
1504 if (len < 0)
1505 return len;
1506
1507 i += len;
1508 pkt_dev->queue_map_max = value;
1509 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1510 return count;
1511 }
1512
1513 if (!strcmp(name, "mpls")) {
1514 unsigned int n, cnt;
1515
1516 len = get_labels(&user_buffer[i], pkt_dev);
1517 if (len < 0)
1518 return len;
1519 i += len;
1520 cnt = sprintf(pg_result, "OK: mpls=");
1521 for (n = 0; n < pkt_dev->nr_labels; n++)
1522 cnt += sprintf(pg_result + cnt,
1523 "%08x%s", ntohl(pkt_dev->labels[n]),
1524 n == pkt_dev->nr_labels-1 ? "" : ",");
1525
1526 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1527 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1528 pkt_dev->svlan_id = 0xffff;
1529
1530 if (debug)
1531 pr_debug("VLAN/SVLAN auto turned off\n");
1532 }
1533 return count;
1534 }
1535
1536 if (!strcmp(name, "vlan_id")) {
1537 len = num_arg(&user_buffer[i], 4, &value);
1538 if (len < 0)
1539 return len;
1540
1541 i += len;
1542 if (value <= 4095) {
1543 pkt_dev->vlan_id = value; /* turn on VLAN */
1544
1545 if (debug)
1546 pr_debug("VLAN turned on\n");
1547
1548 if (debug && pkt_dev->nr_labels)
1549 pr_debug("MPLS auto turned off\n");
1550
1551 pkt_dev->nr_labels = 0; /* turn off MPLS */
1552 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1553 } else {
1554 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1555 pkt_dev->svlan_id = 0xffff;
1556
1557 if (debug)
1558 pr_debug("VLAN/SVLAN turned off\n");
1559 }
1560 return count;
1561 }
1562
1563 if (!strcmp(name, "vlan_p")) {
1564 len = num_arg(&user_buffer[i], 1, &value);
1565 if (len < 0)
1566 return len;
1567
1568 i += len;
1569 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1570 pkt_dev->vlan_p = value;
1571 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1572 } else {
1573 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1574 }
1575 return count;
1576 }
1577
1578 if (!strcmp(name, "vlan_cfi")) {
1579 len = num_arg(&user_buffer[i], 1, &value);
1580 if (len < 0)
1581 return len;
1582
1583 i += len;
1584 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1585 pkt_dev->vlan_cfi = value;
1586 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1587 } else {
1588 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1589 }
1590 return count;
1591 }
1592
1593 if (!strcmp(name, "svlan_id")) {
1594 len = num_arg(&user_buffer[i], 4, &value);
1595 if (len < 0)
1596 return len;
1597
1598 i += len;
1599 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1600 pkt_dev->svlan_id = value; /* turn on SVLAN */
1601
1602 if (debug)
1603 pr_debug("SVLAN turned on\n");
1604
1605 if (debug && pkt_dev->nr_labels)
1606 pr_debug("MPLS auto turned off\n");
1607
1608 pkt_dev->nr_labels = 0; /* turn off MPLS */
1609 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1610 } else {
1611 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1612 pkt_dev->svlan_id = 0xffff;
1613
1614 if (debug)
1615 pr_debug("VLAN/SVLAN turned off\n");
1616 }
1617 return count;
1618 }
1619
1620 if (!strcmp(name, "svlan_p")) {
1621 len = num_arg(&user_buffer[i], 1, &value);
1622 if (len < 0)
1623 return len;
1624
1625 i += len;
1626 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1627 pkt_dev->svlan_p = value;
1628 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1629 } else {
1630 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1631 }
1632 return count;
1633 }
1634
1635 if (!strcmp(name, "svlan_cfi")) {
1636 len = num_arg(&user_buffer[i], 1, &value);
1637 if (len < 0)
1638 return len;
1639
1640 i += len;
1641 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1642 pkt_dev->svlan_cfi = value;
1643 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1644 } else {
1645 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1646 }
1647 return count;
1648 }
1649
1650 if (!strcmp(name, "tos")) {
1651 __u32 tmp_value = 0;
1652 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1653 if (len < 0)
1654 return len;
1655
1656 i += len;
1657 if (len == 2) {
1658 pkt_dev->tos = tmp_value;
1659 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1660 } else {
1661 sprintf(pg_result, "ERROR: tos must be 00-ff");
1662 }
1663 return count;
1664 }
1665
1666 if (!strcmp(name, "traffic_class")) {
1667 __u32 tmp_value = 0;
1668 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1669 if (len < 0)
1670 return len;
1671
1672 i += len;
1673 if (len == 2) {
1674 pkt_dev->traffic_class = tmp_value;
1675 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1676 } else {
1677 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1678 }
1679 return count;
1680 }
1681
1682 if (!strcmp(name, "skb_priority")) {
1683 len = num_arg(&user_buffer[i], 9, &value);
1684 if (len < 0)
1685 return len;
1686
1687 i += len;
1688 pkt_dev->skb_priority = value;
1689 sprintf(pg_result, "OK: skb_priority=%i",
1690 pkt_dev->skb_priority);
1691 return count;
1692 }
1693
1694 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1695 return -EINVAL;
1696 }
1697
1698 static int pktgen_if_open(struct inode *inode, struct file *file)
1699 {
1700 return single_open(file, pktgen_if_show, PDE_DATA(inode));
1701 }
1702
1703 static const struct file_operations pktgen_if_fops = {
1704 .owner = THIS_MODULE,
1705 .open = pktgen_if_open,
1706 .read = seq_read,
1707 .llseek = seq_lseek,
1708 .write = pktgen_if_write,
1709 .release = single_release,
1710 };
1711
1712 static int pktgen_thread_show(struct seq_file *seq, void *v)
1713 {
1714 struct pktgen_thread *t = seq->private;
1715 const struct pktgen_dev *pkt_dev;
1716
1717 BUG_ON(!t);
1718
1719 seq_printf(seq, "Running: ");
1720
1721 if_lock(t);
1722 list_for_each_entry(pkt_dev, &t->if_list, list)
1723 if (pkt_dev->running)
1724 seq_printf(seq, "%s ", pkt_dev->odevname);
1725
1726 seq_printf(seq, "\nStopped: ");
1727
1728 list_for_each_entry(pkt_dev, &t->if_list, list)
1729 if (!pkt_dev->running)
1730 seq_printf(seq, "%s ", pkt_dev->odevname);
1731
1732 if (t->result[0])
1733 seq_printf(seq, "\nResult: %s\n", t->result);
1734 else
1735 seq_printf(seq, "\nResult: NA\n");
1736
1737 if_unlock(t);
1738
1739 return 0;
1740 }
1741
1742 static ssize_t pktgen_thread_write(struct file *file,
1743 const char __user * user_buffer,
1744 size_t count, loff_t * offset)
1745 {
1746 struct seq_file *seq = file->private_data;
1747 struct pktgen_thread *t = seq->private;
1748 int i, max, len, ret;
1749 char name[40];
1750 char *pg_result;
1751
1752 if (count < 1) {
1753 // sprintf(pg_result, "Wrong command format");
1754 return -EINVAL;
1755 }
1756
1757 max = count;
1758 len = count_trail_chars(user_buffer, max);
1759 if (len < 0)
1760 return len;
1761
1762 i = len;
1763
1764 /* Read variable name */
1765
1766 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1767 if (len < 0)
1768 return len;
1769
1770 memset(name, 0, sizeof(name));
1771 if (copy_from_user(name, &user_buffer[i], len))
1772 return -EFAULT;
1773 i += len;
1774
1775 max = count - i;
1776 len = count_trail_chars(&user_buffer[i], max);
1777 if (len < 0)
1778 return len;
1779
1780 i += len;
1781
1782 if (debug)
1783 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
1784
1785 if (!t) {
1786 pr_err("ERROR: No thread\n");
1787 ret = -EINVAL;
1788 goto out;
1789 }
1790
1791 pg_result = &(t->result[0]);
1792
1793 if (!strcmp(name, "add_device")) {
1794 char f[32];
1795 memset(f, 0, 32);
1796 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1797 if (len < 0) {
1798 ret = len;
1799 goto out;
1800 }
1801 if (copy_from_user(f, &user_buffer[i], len))
1802 return -EFAULT;
1803 i += len;
1804 mutex_lock(&pktgen_thread_lock);
1805 ret = pktgen_add_device(t, f);
1806 mutex_unlock(&pktgen_thread_lock);
1807 if (!ret) {
1808 ret = count;
1809 sprintf(pg_result, "OK: add_device=%s", f);
1810 } else
1811 sprintf(pg_result, "ERROR: can not add device %s", f);
1812 goto out;
1813 }
1814
1815 if (!strcmp(name, "rem_device_all")) {
1816 mutex_lock(&pktgen_thread_lock);
1817 t->control |= T_REMDEVALL;
1818 mutex_unlock(&pktgen_thread_lock);
1819 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1820 ret = count;
1821 sprintf(pg_result, "OK: rem_device_all");
1822 goto out;
1823 }
1824
1825 if (!strcmp(name, "max_before_softirq")) {
1826 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1827 ret = count;
1828 goto out;
1829 }
1830
1831 ret = -EINVAL;
1832 out:
1833 return ret;
1834 }
1835
1836 static int pktgen_thread_open(struct inode *inode, struct file *file)
1837 {
1838 return single_open(file, pktgen_thread_show, PDE_DATA(inode));
1839 }
1840
1841 static const struct file_operations pktgen_thread_fops = {
1842 .owner = THIS_MODULE,
1843 .open = pktgen_thread_open,
1844 .read = seq_read,
1845 .llseek = seq_lseek,
1846 .write = pktgen_thread_write,
1847 .release = single_release,
1848 };
1849
1850 /* Think find or remove for NN */
1851 static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn,
1852 const char *ifname, int remove)
1853 {
1854 struct pktgen_thread *t;
1855 struct pktgen_dev *pkt_dev = NULL;
1856 bool exact = (remove == FIND);
1857
1858 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1859 pkt_dev = pktgen_find_dev(t, ifname, exact);
1860 if (pkt_dev) {
1861 if (remove) {
1862 if_lock(t);
1863 pkt_dev->removal_mark = 1;
1864 t->control |= T_REMDEV;
1865 if_unlock(t);
1866 }
1867 break;
1868 }
1869 }
1870 return pkt_dev;
1871 }
1872
1873 /*
1874 * mark a device for removal
1875 */
1876 static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname)
1877 {
1878 struct pktgen_dev *pkt_dev = NULL;
1879 const int max_tries = 10, msec_per_try = 125;
1880 int i = 0;
1881
1882 mutex_lock(&pktgen_thread_lock);
1883 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1884
1885 while (1) {
1886
1887 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE);
1888 if (pkt_dev == NULL)
1889 break; /* success */
1890
1891 mutex_unlock(&pktgen_thread_lock);
1892 pr_debug("%s: waiting for %s to disappear....\n",
1893 __func__, ifname);
1894 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1895 mutex_lock(&pktgen_thread_lock);
1896
1897 if (++i >= max_tries) {
1898 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1899 __func__, msec_per_try * i, ifname);
1900 break;
1901 }
1902
1903 }
1904
1905 mutex_unlock(&pktgen_thread_lock);
1906 }
1907
1908 static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev)
1909 {
1910 struct pktgen_thread *t;
1911
1912 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1913 struct pktgen_dev *pkt_dev;
1914
1915 list_for_each_entry(pkt_dev, &t->if_list, list) {
1916 if (pkt_dev->odev != dev)
1917 continue;
1918
1919 proc_remove(pkt_dev->entry);
1920
1921 pkt_dev->entry = proc_create_data(dev->name, 0600,
1922 pn->proc_dir,
1923 &pktgen_if_fops,
1924 pkt_dev);
1925 if (!pkt_dev->entry)
1926 pr_err("can't move proc entry for '%s'\n",
1927 dev->name);
1928 break;
1929 }
1930 }
1931 }
1932
1933 static int pktgen_device_event(struct notifier_block *unused,
1934 unsigned long event, void *ptr)
1935 {
1936 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1937 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id);
1938
1939 if (pn->pktgen_exiting)
1940 return NOTIFY_DONE;
1941
1942 /* It is OK that we do not hold the group lock right now,
1943 * as we run under the RTNL lock.
1944 */
1945
1946 switch (event) {
1947 case NETDEV_CHANGENAME:
1948 pktgen_change_name(pn, dev);
1949 break;
1950
1951 case NETDEV_UNREGISTER:
1952 pktgen_mark_device(pn, dev->name);
1953 break;
1954 }
1955
1956 return NOTIFY_DONE;
1957 }
1958
1959 static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn,
1960 struct pktgen_dev *pkt_dev,
1961 const char *ifname)
1962 {
1963 char b[IFNAMSIZ+5];
1964 int i;
1965
1966 for (i = 0; ifname[i] != '@'; i++) {
1967 if (i == IFNAMSIZ)
1968 break;
1969
1970 b[i] = ifname[i];
1971 }
1972 b[i] = 0;
1973
1974 return dev_get_by_name(pn->net, b);
1975 }
1976
1977
1978 /* Associate pktgen_dev with a device. */
1979
1980 static int pktgen_setup_dev(const struct pktgen_net *pn,
1981 struct pktgen_dev *pkt_dev, const char *ifname)
1982 {
1983 struct net_device *odev;
1984 int err;
1985
1986 /* Clean old setups */
1987 if (pkt_dev->odev) {
1988 dev_put(pkt_dev->odev);
1989 pkt_dev->odev = NULL;
1990 }
1991
1992 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname);
1993 if (!odev) {
1994 pr_err("no such netdevice: \"%s\"\n", ifname);
1995 return -ENODEV;
1996 }
1997
1998 if (odev->type != ARPHRD_ETHER) {
1999 pr_err("not an ethernet device: \"%s\"\n", ifname);
2000 err = -EINVAL;
2001 } else if (!netif_running(odev)) {
2002 pr_err("device is down: \"%s\"\n", ifname);
2003 err = -ENETDOWN;
2004 } else {
2005 pkt_dev->odev = odev;
2006 return 0;
2007 }
2008
2009 dev_put(odev);
2010 return err;
2011 }
2012
2013 /* Read pkt_dev from the interface and set up internal pktgen_dev
2014 * structure to have the right information to create/send packets
2015 */
2016 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2017 {
2018 int ntxq;
2019
2020 if (!pkt_dev->odev) {
2021 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2022 sprintf(pkt_dev->result,
2023 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2024 return;
2025 }
2026
2027 /* make sure that we don't pick a non-existing transmit queue */
2028 ntxq = pkt_dev->odev->real_num_tx_queues;
2029
2030 if (ntxq <= pkt_dev->queue_map_min) {
2031 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2032 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2033 pkt_dev->odevname);
2034 pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2035 }
2036 if (pkt_dev->queue_map_max >= ntxq) {
2037 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2038 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2039 pkt_dev->odevname);
2040 pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2041 }
2042
2043 /* Default to the interface's mac if not explicitly set. */
2044
2045 if (is_zero_ether_addr(pkt_dev->src_mac))
2046 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2047
2048 /* Set up Dest MAC */
2049 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2050
2051 if (pkt_dev->flags & F_IPV6) {
2052 int i, set = 0, err = 1;
2053 struct inet6_dev *idev;
2054
2055 if (pkt_dev->min_pkt_size == 0) {
2056 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
2057 + sizeof(struct udphdr)
2058 + sizeof(struct pktgen_hdr)
2059 + pkt_dev->pkt_overhead;
2060 }
2061
2062 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2063 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2064 set = 1;
2065 break;
2066 }
2067
2068 if (!set) {
2069
2070 /*
2071 * Use linklevel address if unconfigured.
2072 *
2073 * use ipv6_get_lladdr if/when it's get exported
2074 */
2075
2076 rcu_read_lock();
2077 idev = __in6_dev_get(pkt_dev->odev);
2078 if (idev) {
2079 struct inet6_ifaddr *ifp;
2080
2081 read_lock_bh(&idev->lock);
2082 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2083 if ((ifp->scope & IFA_LINK) &&
2084 !(ifp->flags & IFA_F_TENTATIVE)) {
2085 pkt_dev->cur_in6_saddr = ifp->addr;
2086 err = 0;
2087 break;
2088 }
2089 }
2090 read_unlock_bh(&idev->lock);
2091 }
2092 rcu_read_unlock();
2093 if (err)
2094 pr_err("ERROR: IPv6 link address not available\n");
2095 }
2096 } else {
2097 if (pkt_dev->min_pkt_size == 0) {
2098 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
2099 + sizeof(struct udphdr)
2100 + sizeof(struct pktgen_hdr)
2101 + pkt_dev->pkt_overhead;
2102 }
2103
2104 pkt_dev->saddr_min = 0;
2105 pkt_dev->saddr_max = 0;
2106 if (strlen(pkt_dev->src_min) == 0) {
2107
2108 struct in_device *in_dev;
2109
2110 rcu_read_lock();
2111 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2112 if (in_dev) {
2113 if (in_dev->ifa_list) {
2114 pkt_dev->saddr_min =
2115 in_dev->ifa_list->ifa_address;
2116 pkt_dev->saddr_max = pkt_dev->saddr_min;
2117 }
2118 }
2119 rcu_read_unlock();
2120 } else {
2121 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2122 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2123 }
2124
2125 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2126 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2127 }
2128 /* Initialize current values. */
2129 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2130 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
2131 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
2132
2133 pkt_dev->cur_dst_mac_offset = 0;
2134 pkt_dev->cur_src_mac_offset = 0;
2135 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2136 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2137 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2138 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2139 pkt_dev->nflows = 0;
2140 }
2141
2142
2143 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2144 {
2145 ktime_t start_time, end_time;
2146 s64 remaining;
2147 struct hrtimer_sleeper t;
2148
2149 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2150 hrtimer_set_expires(&t.timer, spin_until);
2151
2152 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2153 if (remaining <= 0) {
2154 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2155 return;
2156 }
2157
2158 start_time = ktime_get();
2159 if (remaining < 100000) {
2160 /* for small delays (<100us), just loop until limit is reached */
2161 do {
2162 end_time = ktime_get();
2163 } while (ktime_compare(end_time, spin_until) < 0);
2164 } else {
2165 /* see do_nanosleep */
2166 hrtimer_init_sleeper(&t, current);
2167 do {
2168 set_current_state(TASK_INTERRUPTIBLE);
2169 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2170 if (!hrtimer_active(&t.timer))
2171 t.task = NULL;
2172
2173 if (likely(t.task))
2174 schedule();
2175
2176 hrtimer_cancel(&t.timer);
2177 } while (t.task && pkt_dev->running && !signal_pending(current));
2178 __set_current_state(TASK_RUNNING);
2179 end_time = ktime_get();
2180 }
2181
2182 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2183 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2184 }
2185
2186 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2187 {
2188 pkt_dev->pkt_overhead = 0;
2189 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2190 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2191 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2192 }
2193
2194 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2195 {
2196 return !!(pkt_dev->flows[flow].flags & F_INIT);
2197 }
2198
2199 static inline int f_pick(struct pktgen_dev *pkt_dev)
2200 {
2201 int flow = pkt_dev->curfl;
2202
2203 if (pkt_dev->flags & F_FLOW_SEQ) {
2204 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2205 /* reset time */
2206 pkt_dev->flows[flow].count = 0;
2207 pkt_dev->flows[flow].flags = 0;
2208 pkt_dev->curfl += 1;
2209 if (pkt_dev->curfl >= pkt_dev->cflows)
2210 pkt_dev->curfl = 0; /*reset */
2211 }
2212 } else {
2213 flow = prandom_u32() % pkt_dev->cflows;
2214 pkt_dev->curfl = flow;
2215
2216 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2217 pkt_dev->flows[flow].count = 0;
2218 pkt_dev->flows[flow].flags = 0;
2219 }
2220 }
2221
2222 return pkt_dev->curfl;
2223 }
2224
2225
2226 #ifdef CONFIG_XFRM
2227 /* If there was already an IPSEC SA, we keep it as is, else
2228 * we go look for it ...
2229 */
2230 #define DUMMY_MARK 0
2231 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2232 {
2233 struct xfrm_state *x = pkt_dev->flows[flow].x;
2234 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
2235 if (!x) {
2236 /*slow path: we dont already have xfrm_state*/
2237 x = xfrm_stateonly_find(pn->net, DUMMY_MARK,
2238 (xfrm_address_t *)&pkt_dev->cur_daddr,
2239 (xfrm_address_t *)&pkt_dev->cur_saddr,
2240 AF_INET,
2241 pkt_dev->ipsmode,
2242 pkt_dev->ipsproto, 0);
2243 if (x) {
2244 pkt_dev->flows[flow].x = x;
2245 set_pkt_overhead(pkt_dev);
2246 pkt_dev->pkt_overhead += x->props.header_len;
2247 }
2248
2249 }
2250 }
2251 #endif
2252 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2253 {
2254
2255 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2256 pkt_dev->cur_queue_map = smp_processor_id();
2257
2258 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2259 __u16 t;
2260 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2261 t = prandom_u32() %
2262 (pkt_dev->queue_map_max -
2263 pkt_dev->queue_map_min + 1)
2264 + pkt_dev->queue_map_min;
2265 } else {
2266 t = pkt_dev->cur_queue_map + 1;
2267 if (t > pkt_dev->queue_map_max)
2268 t = pkt_dev->queue_map_min;
2269 }
2270 pkt_dev->cur_queue_map = t;
2271 }
2272 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2273 }
2274
2275 /* Increment/randomize headers according to flags and current values
2276 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2277 */
2278 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2279 {
2280 __u32 imn;
2281 __u32 imx;
2282 int flow = 0;
2283
2284 if (pkt_dev->cflows)
2285 flow = f_pick(pkt_dev);
2286
2287 /* Deal with source MAC */
2288 if (pkt_dev->src_mac_count > 1) {
2289 __u32 mc;
2290 __u32 tmp;
2291
2292 if (pkt_dev->flags & F_MACSRC_RND)
2293 mc = prandom_u32() % pkt_dev->src_mac_count;
2294 else {
2295 mc = pkt_dev->cur_src_mac_offset++;
2296 if (pkt_dev->cur_src_mac_offset >=
2297 pkt_dev->src_mac_count)
2298 pkt_dev->cur_src_mac_offset = 0;
2299 }
2300
2301 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2302 pkt_dev->hh[11] = tmp;
2303 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2304 pkt_dev->hh[10] = tmp;
2305 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2306 pkt_dev->hh[9] = tmp;
2307 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2308 pkt_dev->hh[8] = tmp;
2309 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2310 pkt_dev->hh[7] = tmp;
2311 }
2312
2313 /* Deal with Destination MAC */
2314 if (pkt_dev->dst_mac_count > 1) {
2315 __u32 mc;
2316 __u32 tmp;
2317
2318 if (pkt_dev->flags & F_MACDST_RND)
2319 mc = prandom_u32() % pkt_dev->dst_mac_count;
2320
2321 else {
2322 mc = pkt_dev->cur_dst_mac_offset++;
2323 if (pkt_dev->cur_dst_mac_offset >=
2324 pkt_dev->dst_mac_count) {
2325 pkt_dev->cur_dst_mac_offset = 0;
2326 }
2327 }
2328
2329 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2330 pkt_dev->hh[5] = tmp;
2331 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2332 pkt_dev->hh[4] = tmp;
2333 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2334 pkt_dev->hh[3] = tmp;
2335 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2336 pkt_dev->hh[2] = tmp;
2337 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2338 pkt_dev->hh[1] = tmp;
2339 }
2340
2341 if (pkt_dev->flags & F_MPLS_RND) {
2342 unsigned int i;
2343 for (i = 0; i < pkt_dev->nr_labels; i++)
2344 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2345 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2346 ((__force __be32)prandom_u32() &
2347 htonl(0x000fffff));
2348 }
2349
2350 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2351 pkt_dev->vlan_id = prandom_u32() & (4096 - 1);
2352 }
2353
2354 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2355 pkt_dev->svlan_id = prandom_u32() & (4096 - 1);
2356 }
2357
2358 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2359 if (pkt_dev->flags & F_UDPSRC_RND)
2360 pkt_dev->cur_udp_src = prandom_u32() %
2361 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2362 + pkt_dev->udp_src_min;
2363
2364 else {
2365 pkt_dev->cur_udp_src++;
2366 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2367 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2368 }
2369 }
2370
2371 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2372 if (pkt_dev->flags & F_UDPDST_RND) {
2373 pkt_dev->cur_udp_dst = prandom_u32() %
2374 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2375 + pkt_dev->udp_dst_min;
2376 } else {
2377 pkt_dev->cur_udp_dst++;
2378 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2379 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2380 }
2381 }
2382
2383 if (!(pkt_dev->flags & F_IPV6)) {
2384
2385 imn = ntohl(pkt_dev->saddr_min);
2386 imx = ntohl(pkt_dev->saddr_max);
2387 if (imn < imx) {
2388 __u32 t;
2389 if (pkt_dev->flags & F_IPSRC_RND)
2390 t = prandom_u32() % (imx - imn) + imn;
2391 else {
2392 t = ntohl(pkt_dev->cur_saddr);
2393 t++;
2394 if (t > imx)
2395 t = imn;
2396
2397 }
2398 pkt_dev->cur_saddr = htonl(t);
2399 }
2400
2401 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2402 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2403 } else {
2404 imn = ntohl(pkt_dev->daddr_min);
2405 imx = ntohl(pkt_dev->daddr_max);
2406 if (imn < imx) {
2407 __u32 t;
2408 __be32 s;
2409 if (pkt_dev->flags & F_IPDST_RND) {
2410
2411 do {
2412 t = prandom_u32() %
2413 (imx - imn) + imn;
2414 s = htonl(t);
2415 } while (ipv4_is_loopback(s) ||
2416 ipv4_is_multicast(s) ||
2417 ipv4_is_lbcast(s) ||
2418 ipv4_is_zeronet(s) ||
2419 ipv4_is_local_multicast(s));
2420 pkt_dev->cur_daddr = s;
2421 } else {
2422 t = ntohl(pkt_dev->cur_daddr);
2423 t++;
2424 if (t > imx) {
2425 t = imn;
2426 }
2427 pkt_dev->cur_daddr = htonl(t);
2428 }
2429 }
2430 if (pkt_dev->cflows) {
2431 pkt_dev->flows[flow].flags |= F_INIT;
2432 pkt_dev->flows[flow].cur_daddr =
2433 pkt_dev->cur_daddr;
2434 #ifdef CONFIG_XFRM
2435 if (pkt_dev->flags & F_IPSEC_ON)
2436 get_ipsec_sa(pkt_dev, flow);
2437 #endif
2438 pkt_dev->nflows++;
2439 }
2440 }
2441 } else { /* IPV6 * */
2442
2443 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
2444 int i;
2445
2446 /* Only random destinations yet */
2447
2448 for (i = 0; i < 4; i++) {
2449 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2450 (((__force __be32)prandom_u32() |
2451 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2452 pkt_dev->max_in6_daddr.s6_addr32[i]);
2453 }
2454 }
2455 }
2456
2457 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2458 __u32 t;
2459 if (pkt_dev->flags & F_TXSIZE_RND) {
2460 t = prandom_u32() %
2461 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2462 + pkt_dev->min_pkt_size;
2463 } else {
2464 t = pkt_dev->cur_pkt_size + 1;
2465 if (t > pkt_dev->max_pkt_size)
2466 t = pkt_dev->min_pkt_size;
2467 }
2468 pkt_dev->cur_pkt_size = t;
2469 }
2470
2471 set_cur_queue_map(pkt_dev);
2472
2473 pkt_dev->flows[flow].count++;
2474 }
2475
2476
2477 #ifdef CONFIG_XFRM
2478 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2479 {
2480 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2481 int err = 0;
2482
2483 if (!x)
2484 return 0;
2485 /* XXX: we dont support tunnel mode for now until
2486 * we resolve the dst issue */
2487 if (x->props.mode != XFRM_MODE_TRANSPORT)
2488 return 0;
2489
2490 spin_lock(&x->lock);
2491
2492 err = x->outer_mode->output(x, skb);
2493 if (err)
2494 goto error;
2495 err = x->type->output(x, skb);
2496 if (err)
2497 goto error;
2498
2499 x->curlft.bytes += skb->len;
2500 x->curlft.packets++;
2501 error:
2502 spin_unlock(&x->lock);
2503 return err;
2504 }
2505
2506 static void free_SAs(struct pktgen_dev *pkt_dev)
2507 {
2508 if (pkt_dev->cflows) {
2509 /* let go of the SAs if we have them */
2510 int i;
2511 for (i = 0; i < pkt_dev->cflows; i++) {
2512 struct xfrm_state *x = pkt_dev->flows[i].x;
2513 if (x) {
2514 xfrm_state_put(x);
2515 pkt_dev->flows[i].x = NULL;
2516 }
2517 }
2518 }
2519 }
2520
2521 static int process_ipsec(struct pktgen_dev *pkt_dev,
2522 struct sk_buff *skb, __be16 protocol)
2523 {
2524 if (pkt_dev->flags & F_IPSEC_ON) {
2525 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2526 int nhead = 0;
2527 if (x) {
2528 int ret;
2529 __u8 *eth;
2530 nhead = x->props.header_len - skb_headroom(skb);
2531 if (nhead > 0) {
2532 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2533 if (ret < 0) {
2534 pr_err("Error expanding ipsec packet %d\n",
2535 ret);
2536 goto err;
2537 }
2538 }
2539
2540 /* ipsec is not expecting ll header */
2541 skb_pull(skb, ETH_HLEN);
2542 ret = pktgen_output_ipsec(skb, pkt_dev);
2543 if (ret) {
2544 pr_err("Error creating ipsec packet %d\n", ret);
2545 goto err;
2546 }
2547 /* restore ll */
2548 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2549 memcpy(eth, pkt_dev->hh, 12);
2550 *(u16 *) &eth[12] = protocol;
2551 }
2552 }
2553 return 1;
2554 err:
2555 kfree_skb(skb);
2556 return 0;
2557 }
2558 #endif
2559
2560 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2561 {
2562 unsigned int i;
2563 for (i = 0; i < pkt_dev->nr_labels; i++)
2564 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2565
2566 mpls--;
2567 *mpls |= MPLS_STACK_BOTTOM;
2568 }
2569
2570 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2571 unsigned int prio)
2572 {
2573 return htons(id | (cfi << 12) | (prio << 13));
2574 }
2575
2576 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2577 int datalen)
2578 {
2579 struct timeval timestamp;
2580 struct pktgen_hdr *pgh;
2581
2582 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
2583 datalen -= sizeof(*pgh);
2584
2585 if (pkt_dev->nfrags <= 0) {
2586 memset(skb_put(skb, datalen), 0, datalen);
2587 } else {
2588 int frags = pkt_dev->nfrags;
2589 int i, len;
2590 int frag_len;
2591
2592
2593 if (frags > MAX_SKB_FRAGS)
2594 frags = MAX_SKB_FRAGS;
2595 len = datalen - frags * PAGE_SIZE;
2596 if (len > 0) {
2597 memset(skb_put(skb, len), 0, len);
2598 datalen = frags * PAGE_SIZE;
2599 }
2600
2601 i = 0;
2602 frag_len = (datalen/frags) < PAGE_SIZE ?
2603 (datalen/frags) : PAGE_SIZE;
2604 while (datalen > 0) {
2605 if (unlikely(!pkt_dev->page)) {
2606 int node = numa_node_id();
2607
2608 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2609 node = pkt_dev->node;
2610 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2611 if (!pkt_dev->page)
2612 break;
2613 }
2614 get_page(pkt_dev->page);
2615 skb_frag_set_page(skb, i, pkt_dev->page);
2616 skb_shinfo(skb)->frags[i].page_offset = 0;
2617 /*last fragment, fill rest of data*/
2618 if (i == (frags - 1))
2619 skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2620 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2621 else
2622 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2623 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2624 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2625 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2626 i++;
2627 skb_shinfo(skb)->nr_frags = i;
2628 }
2629 }
2630
2631 /* Stamp the time, and sequence number,
2632 * convert them to network byte order
2633 */
2634 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2635 pgh->seq_num = htonl(pkt_dev->seq_num);
2636
2637 do_gettimeofday(&timestamp);
2638 pgh->tv_sec = htonl(timestamp.tv_sec);
2639 pgh->tv_usec = htonl(timestamp.tv_usec);
2640 }
2641
2642 static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
2643 struct pktgen_dev *pkt_dev,
2644 unsigned int extralen)
2645 {
2646 struct sk_buff *skb = NULL;
2647 unsigned int size = pkt_dev->cur_pkt_size + 64 + extralen +
2648 pkt_dev->pkt_overhead;
2649
2650 if (pkt_dev->flags & F_NODE) {
2651 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id();
2652
2653 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node);
2654 if (likely(skb)) {
2655 skb_reserve(skb, NET_SKB_PAD);
2656 skb->dev = dev;
2657 }
2658 } else {
2659 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
2660 }
2661
2662 return skb;
2663 }
2664
2665 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2666 struct pktgen_dev *pkt_dev)
2667 {
2668 struct sk_buff *skb = NULL;
2669 __u8 *eth;
2670 struct udphdr *udph;
2671 int datalen, iplen;
2672 struct iphdr *iph;
2673 __be16 protocol = htons(ETH_P_IP);
2674 __be32 *mpls;
2675 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2676 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2677 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2678 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2679 u16 queue_map;
2680
2681 if (pkt_dev->nr_labels)
2682 protocol = htons(ETH_P_MPLS_UC);
2683
2684 if (pkt_dev->vlan_id != 0xffff)
2685 protocol = htons(ETH_P_8021Q);
2686
2687 /* Update any of the values, used when we're incrementing various
2688 * fields.
2689 */
2690 mod_cur_headers(pkt_dev);
2691 queue_map = pkt_dev->cur_queue_map;
2692
2693 datalen = (odev->hard_header_len + 16) & ~0xf;
2694
2695 skb = pktgen_alloc_skb(odev, pkt_dev, datalen);
2696 if (!skb) {
2697 sprintf(pkt_dev->result, "No memory");
2698 return NULL;
2699 }
2700
2701 prefetchw(skb->data);
2702 skb_reserve(skb, datalen);
2703
2704 /* Reserve for ethernet and IP header */
2705 eth = (__u8 *) skb_push(skb, 14);
2706 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2707 if (pkt_dev->nr_labels)
2708 mpls_push(mpls, pkt_dev);
2709
2710 if (pkt_dev->vlan_id != 0xffff) {
2711 if (pkt_dev->svlan_id != 0xffff) {
2712 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2713 *svlan_tci = build_tci(pkt_dev->svlan_id,
2714 pkt_dev->svlan_cfi,
2715 pkt_dev->svlan_p);
2716 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2717 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2718 }
2719 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2720 *vlan_tci = build_tci(pkt_dev->vlan_id,
2721 pkt_dev->vlan_cfi,
2722 pkt_dev->vlan_p);
2723 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2724 *vlan_encapsulated_proto = htons(ETH_P_IP);
2725 }
2726
2727 skb_set_mac_header(skb, 0);
2728 skb_set_network_header(skb, skb->len);
2729 iph = (struct iphdr *) skb_put(skb, sizeof(struct iphdr));
2730
2731 skb_set_transport_header(skb, skb->len);
2732 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2733 skb_set_queue_mapping(skb, queue_map);
2734 skb->priority = pkt_dev->skb_priority;
2735
2736 memcpy(eth, pkt_dev->hh, 12);
2737 *(__be16 *) & eth[12] = protocol;
2738
2739 /* Eth + IPh + UDPh + mpls */
2740 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2741 pkt_dev->pkt_overhead;
2742 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
2743 datalen = sizeof(struct pktgen_hdr);
2744
2745 udph->source = htons(pkt_dev->cur_udp_src);
2746 udph->dest = htons(pkt_dev->cur_udp_dst);
2747 udph->len = htons(datalen + 8); /* DATA + udphdr */
2748 udph->check = 0;
2749
2750 iph->ihl = 5;
2751 iph->version = 4;
2752 iph->ttl = 32;
2753 iph->tos = pkt_dev->tos;
2754 iph->protocol = IPPROTO_UDP; /* UDP */
2755 iph->saddr = pkt_dev->cur_saddr;
2756 iph->daddr = pkt_dev->cur_daddr;
2757 iph->id = htons(pkt_dev->ip_id);
2758 pkt_dev->ip_id++;
2759 iph->frag_off = 0;
2760 iplen = 20 + 8 + datalen;
2761 iph->tot_len = htons(iplen);
2762 ip_send_check(iph);
2763 skb->protocol = protocol;
2764 skb->dev = odev;
2765 skb->pkt_type = PACKET_HOST;
2766
2767 if (!(pkt_dev->flags & F_UDPCSUM)) {
2768 skb->ip_summed = CHECKSUM_NONE;
2769 } else if (odev->features & NETIF_F_V4_CSUM) {
2770 skb->ip_summed = CHECKSUM_PARTIAL;
2771 skb->csum = 0;
2772 udp4_hwcsum(skb, udph->source, udph->dest);
2773 } else {
2774 __wsum csum = udp_csum(skb);
2775
2776 /* add protocol-dependent pseudo-header */
2777 udph->check = csum_tcpudp_magic(udph->source, udph->dest,
2778 datalen + 8, IPPROTO_UDP, csum);
2779
2780 if (udph->check == 0)
2781 udph->check = CSUM_MANGLED_0;
2782 }
2783
2784 pktgen_finalize_skb(pkt_dev, skb, datalen);
2785
2786 #ifdef CONFIG_XFRM
2787 if (!process_ipsec(pkt_dev, skb, protocol))
2788 return NULL;
2789 #endif
2790
2791 return skb;
2792 }
2793
2794 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2795 struct pktgen_dev *pkt_dev)
2796 {
2797 struct sk_buff *skb = NULL;
2798 __u8 *eth;
2799 struct udphdr *udph;
2800 int datalen, udplen;
2801 struct ipv6hdr *iph;
2802 __be16 protocol = htons(ETH_P_IPV6);
2803 __be32 *mpls;
2804 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2805 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2806 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2807 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2808 u16 queue_map;
2809
2810 if (pkt_dev->nr_labels)
2811 protocol = htons(ETH_P_MPLS_UC);
2812
2813 if (pkt_dev->vlan_id != 0xffff)
2814 protocol = htons(ETH_P_8021Q);
2815
2816 /* Update any of the values, used when we're incrementing various
2817 * fields.
2818 */
2819 mod_cur_headers(pkt_dev);
2820 queue_map = pkt_dev->cur_queue_map;
2821
2822 skb = pktgen_alloc_skb(odev, pkt_dev, 16);
2823 if (!skb) {
2824 sprintf(pkt_dev->result, "No memory");
2825 return NULL;
2826 }
2827
2828 prefetchw(skb->data);
2829 skb_reserve(skb, 16);
2830
2831 /* Reserve for ethernet and IP header */
2832 eth = (__u8 *) skb_push(skb, 14);
2833 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2834 if (pkt_dev->nr_labels)
2835 mpls_push(mpls, pkt_dev);
2836
2837 if (pkt_dev->vlan_id != 0xffff) {
2838 if (pkt_dev->svlan_id != 0xffff) {
2839 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2840 *svlan_tci = build_tci(pkt_dev->svlan_id,
2841 pkt_dev->svlan_cfi,
2842 pkt_dev->svlan_p);
2843 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2844 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2845 }
2846 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2847 *vlan_tci = build_tci(pkt_dev->vlan_id,
2848 pkt_dev->vlan_cfi,
2849 pkt_dev->vlan_p);
2850 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2851 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2852 }
2853
2854 skb_set_mac_header(skb, 0);
2855 skb_set_network_header(skb, skb->len);
2856 iph = (struct ipv6hdr *) skb_put(skb, sizeof(struct ipv6hdr));
2857
2858 skb_set_transport_header(skb, skb->len);
2859 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2860 skb_set_queue_mapping(skb, queue_map);
2861 skb->priority = pkt_dev->skb_priority;
2862
2863 memcpy(eth, pkt_dev->hh, 12);
2864 *(__be16 *) &eth[12] = protocol;
2865
2866 /* Eth + IPh + UDPh + mpls */
2867 datalen = pkt_dev->cur_pkt_size - 14 -
2868 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2869 pkt_dev->pkt_overhead;
2870
2871 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
2872 datalen = sizeof(struct pktgen_hdr);
2873 net_info_ratelimited("increased datalen to %d\n", datalen);
2874 }
2875
2876 udplen = datalen + sizeof(struct udphdr);
2877 udph->source = htons(pkt_dev->cur_udp_src);
2878 udph->dest = htons(pkt_dev->cur_udp_dst);
2879 udph->len = htons(udplen);
2880 udph->check = 0;
2881
2882 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2883
2884 if (pkt_dev->traffic_class) {
2885 /* Version + traffic class + flow (0) */
2886 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2887 }
2888
2889 iph->hop_limit = 32;
2890
2891 iph->payload_len = htons(udplen);
2892 iph->nexthdr = IPPROTO_UDP;
2893
2894 iph->daddr = pkt_dev->cur_in6_daddr;
2895 iph->saddr = pkt_dev->cur_in6_saddr;
2896
2897 skb->protocol = protocol;
2898 skb->dev = odev;
2899 skb->pkt_type = PACKET_HOST;
2900
2901 if (!(pkt_dev->flags & F_UDPCSUM)) {
2902 skb->ip_summed = CHECKSUM_NONE;
2903 } else if (odev->features & NETIF_F_V6_CSUM) {
2904 skb->ip_summed = CHECKSUM_PARTIAL;
2905 skb->csum_start = skb_transport_header(skb) - skb->head;
2906 skb->csum_offset = offsetof(struct udphdr, check);
2907 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0);
2908 } else {
2909 __wsum csum = udp_csum(skb);
2910
2911 /* add protocol-dependent pseudo-header */
2912 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum);
2913
2914 if (udph->check == 0)
2915 udph->check = CSUM_MANGLED_0;
2916 }
2917
2918 pktgen_finalize_skb(pkt_dev, skb, datalen);
2919
2920 return skb;
2921 }
2922
2923 static struct sk_buff *fill_packet(struct net_device *odev,
2924 struct pktgen_dev *pkt_dev)
2925 {
2926 if (pkt_dev->flags & F_IPV6)
2927 return fill_packet_ipv6(odev, pkt_dev);
2928 else
2929 return fill_packet_ipv4(odev, pkt_dev);
2930 }
2931
2932 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2933 {
2934 pkt_dev->seq_num = 1;
2935 pkt_dev->idle_acc = 0;
2936 pkt_dev->sofar = 0;
2937 pkt_dev->tx_bytes = 0;
2938 pkt_dev->errors = 0;
2939 }
2940
2941 /* Set up structure for sending pkts, clear counters */
2942
2943 static void pktgen_run(struct pktgen_thread *t)
2944 {
2945 struct pktgen_dev *pkt_dev;
2946 int started = 0;
2947
2948 func_enter();
2949
2950 if_lock(t);
2951 list_for_each_entry(pkt_dev, &t->if_list, list) {
2952
2953 /*
2954 * setup odev and create initial packet.
2955 */
2956 pktgen_setup_inject(pkt_dev);
2957
2958 if (pkt_dev->odev) {
2959 pktgen_clear_counters(pkt_dev);
2960 pkt_dev->running = 1; /* Cranke yeself! */
2961 pkt_dev->skb = NULL;
2962 pkt_dev->started_at = pkt_dev->next_tx = ktime_get();
2963
2964 set_pkt_overhead(pkt_dev);
2965
2966 strcpy(pkt_dev->result, "Starting");
2967 started++;
2968 } else
2969 strcpy(pkt_dev->result, "Error starting");
2970 }
2971 if_unlock(t);
2972 if (started)
2973 t->control &= ~(T_STOP);
2974 }
2975
2976 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn)
2977 {
2978 struct pktgen_thread *t;
2979
2980 func_enter();
2981
2982 mutex_lock(&pktgen_thread_lock);
2983
2984 list_for_each_entry(t, &pn->pktgen_threads, th_list)
2985 t->control |= T_STOP;
2986
2987 mutex_unlock(&pktgen_thread_lock);
2988 }
2989
2990 static int thread_is_running(const struct pktgen_thread *t)
2991 {
2992 const struct pktgen_dev *pkt_dev;
2993
2994 list_for_each_entry(pkt_dev, &t->if_list, list)
2995 if (pkt_dev->running)
2996 return 1;
2997 return 0;
2998 }
2999
3000 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3001 {
3002 if_lock(t);
3003
3004 while (thread_is_running(t)) {
3005
3006 if_unlock(t);
3007
3008 msleep_interruptible(100);
3009
3010 if (signal_pending(current))
3011 goto signal;
3012 if_lock(t);
3013 }
3014 if_unlock(t);
3015 return 1;
3016 signal:
3017 return 0;
3018 }
3019
3020 static int pktgen_wait_all_threads_run(struct pktgen_net *pn)
3021 {
3022 struct pktgen_thread *t;
3023 int sig = 1;
3024
3025 mutex_lock(&pktgen_thread_lock);
3026
3027 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
3028 sig = pktgen_wait_thread_run(t);
3029 if (sig == 0)
3030 break;
3031 }
3032
3033 if (sig == 0)
3034 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3035 t->control |= (T_STOP);
3036
3037 mutex_unlock(&pktgen_thread_lock);
3038 return sig;
3039 }
3040
3041 static void pktgen_run_all_threads(struct pktgen_net *pn)
3042 {
3043 struct pktgen_thread *t;
3044
3045 func_enter();
3046
3047 mutex_lock(&pktgen_thread_lock);
3048
3049 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3050 t->control |= (T_RUN);
3051
3052 mutex_unlock(&pktgen_thread_lock);
3053
3054 /* Propagate thread->control */
3055 schedule_timeout_interruptible(msecs_to_jiffies(125));
3056
3057 pktgen_wait_all_threads_run(pn);
3058 }
3059
3060 static void pktgen_reset_all_threads(struct pktgen_net *pn)
3061 {
3062 struct pktgen_thread *t;
3063
3064 func_enter();
3065
3066 mutex_lock(&pktgen_thread_lock);
3067
3068 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3069 t->control |= (T_REMDEVALL);
3070
3071 mutex_unlock(&pktgen_thread_lock);
3072
3073 /* Propagate thread->control */
3074 schedule_timeout_interruptible(msecs_to_jiffies(125));
3075
3076 pktgen_wait_all_threads_run(pn);
3077 }
3078
3079 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3080 {
3081 __u64 bps, mbps, pps;
3082 char *p = pkt_dev->result;
3083 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3084 pkt_dev->started_at);
3085 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3086
3087 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3088 (unsigned long long)ktime_to_us(elapsed),
3089 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3090 (unsigned long long)ktime_to_us(idle),
3091 (unsigned long long)pkt_dev->sofar,
3092 pkt_dev->cur_pkt_size, nr_frags);
3093
3094 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3095 ktime_to_ns(elapsed));
3096
3097 bps = pps * 8 * pkt_dev->cur_pkt_size;
3098
3099 mbps = bps;
3100 do_div(mbps, 1000000);
3101 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3102 (unsigned long long)pps,
3103 (unsigned long long)mbps,
3104 (unsigned long long)bps,
3105 (unsigned long long)pkt_dev->errors);
3106 }
3107
3108 /* Set stopped-at timer, remove from running list, do counters & statistics */
3109 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3110 {
3111 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3112
3113 if (!pkt_dev->running) {
3114 pr_warning("interface: %s is already stopped\n",
3115 pkt_dev->odevname);
3116 return -EINVAL;
3117 }
3118
3119 kfree_skb(pkt_dev->skb);
3120 pkt_dev->skb = NULL;
3121 pkt_dev->stopped_at = ktime_get();
3122 pkt_dev->running = 0;
3123
3124 show_results(pkt_dev, nr_frags);
3125
3126 return 0;
3127 }
3128
3129 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3130 {
3131 struct pktgen_dev *pkt_dev, *best = NULL;
3132
3133 if_lock(t);
3134
3135 list_for_each_entry(pkt_dev, &t->if_list, list) {
3136 if (!pkt_dev->running)
3137 continue;
3138 if (best == NULL)
3139 best = pkt_dev;
3140 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0)
3141 best = pkt_dev;
3142 }
3143 if_unlock(t);
3144 return best;
3145 }
3146
3147 static void pktgen_stop(struct pktgen_thread *t)
3148 {
3149 struct pktgen_dev *pkt_dev;
3150
3151 func_enter();
3152
3153 if_lock(t);
3154
3155 list_for_each_entry(pkt_dev, &t->if_list, list) {
3156 pktgen_stop_device(pkt_dev);
3157 }
3158
3159 if_unlock(t);
3160 }
3161
3162 /*
3163 * one of our devices needs to be removed - find it
3164 * and remove it
3165 */
3166 static void pktgen_rem_one_if(struct pktgen_thread *t)
3167 {
3168 struct list_head *q, *n;
3169 struct pktgen_dev *cur;
3170
3171 func_enter();
3172
3173 if_lock(t);
3174
3175 list_for_each_safe(q, n, &t->if_list) {
3176 cur = list_entry(q, struct pktgen_dev, list);
3177
3178 if (!cur->removal_mark)
3179 continue;
3180
3181 kfree_skb(cur->skb);
3182 cur->skb = NULL;
3183
3184 pktgen_remove_device(t, cur);
3185
3186 break;
3187 }
3188
3189 if_unlock(t);
3190 }
3191
3192 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3193 {
3194 struct list_head *q, *n;
3195 struct pktgen_dev *cur;
3196
3197 func_enter();
3198
3199 /* Remove all devices, free mem */
3200
3201 if_lock(t);
3202
3203 list_for_each_safe(q, n, &t->if_list) {
3204 cur = list_entry(q, struct pktgen_dev, list);
3205
3206 kfree_skb(cur->skb);
3207 cur->skb = NULL;
3208
3209 pktgen_remove_device(t, cur);
3210 }
3211
3212 if_unlock(t);
3213 }
3214
3215 static void pktgen_rem_thread(struct pktgen_thread *t)
3216 {
3217 /* Remove from the thread list */
3218 remove_proc_entry(t->tsk->comm, t->net->proc_dir);
3219 }
3220
3221 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3222 {
3223 ktime_t idle_start = ktime_get();
3224 schedule();
3225 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3226 }
3227
3228 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3229 {
3230 ktime_t idle_start = ktime_get();
3231
3232 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3233 if (signal_pending(current))
3234 break;
3235
3236 if (need_resched())
3237 pktgen_resched(pkt_dev);
3238 else
3239 cpu_relax();
3240 }
3241 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3242 }
3243
3244 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3245 {
3246 struct net_device *odev = pkt_dev->odev;
3247 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3248 = odev->netdev_ops->ndo_start_xmit;
3249 struct netdev_queue *txq;
3250 u16 queue_map;
3251 int ret;
3252
3253 /* If device is offline, then don't send */
3254 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3255 pktgen_stop_device(pkt_dev);
3256 return;
3257 }
3258
3259 /* This is max DELAY, this has special meaning of
3260 * "never transmit"
3261 */
3262 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3263 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
3264 return;
3265 }
3266
3267 /* If no skb or clone count exhausted then get new one */
3268 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3269 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3270 /* build a new pkt */
3271 kfree_skb(pkt_dev->skb);
3272
3273 pkt_dev->skb = fill_packet(odev, pkt_dev);
3274 if (pkt_dev->skb == NULL) {
3275 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3276 schedule();
3277 pkt_dev->clone_count--; /* back out increment, OOM */
3278 return;
3279 }
3280 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3281 pkt_dev->allocated_skbs++;
3282 pkt_dev->clone_count = 0; /* reset counter */
3283 }
3284
3285 if (pkt_dev->delay && pkt_dev->last_ok)
3286 spin(pkt_dev, pkt_dev->next_tx);
3287
3288 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3289 txq = netdev_get_tx_queue(odev, queue_map);
3290
3291 __netif_tx_lock_bh(txq);
3292
3293 if (unlikely(netif_xmit_frozen_or_stopped(txq))) {
3294 ret = NETDEV_TX_BUSY;
3295 pkt_dev->last_ok = 0;
3296 goto unlock;
3297 }
3298 atomic_inc(&(pkt_dev->skb->users));
3299 ret = (*xmit)(pkt_dev->skb, odev);
3300
3301 switch (ret) {
3302 case NETDEV_TX_OK:
3303 txq_trans_update(txq);
3304 pkt_dev->last_ok = 1;
3305 pkt_dev->sofar++;
3306 pkt_dev->seq_num++;
3307 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3308 break;
3309 case NET_XMIT_DROP:
3310 case NET_XMIT_CN:
3311 case NET_XMIT_POLICED:
3312 /* skb has been consumed */
3313 pkt_dev->errors++;
3314 break;
3315 default: /* Drivers are not supposed to return other values! */
3316 net_info_ratelimited("%s xmit error: %d\n",
3317 pkt_dev->odevname, ret);
3318 pkt_dev->errors++;
3319 /* fallthru */
3320 case NETDEV_TX_LOCKED:
3321 case NETDEV_TX_BUSY:
3322 /* Retry it next time */
3323 atomic_dec(&(pkt_dev->skb->users));
3324 pkt_dev->last_ok = 0;
3325 }
3326 unlock:
3327 __netif_tx_unlock_bh(txq);
3328
3329 /* If pkt_dev->count is zero, then run forever */
3330 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3331 pktgen_wait_for_skb(pkt_dev);
3332
3333 /* Done with this */
3334 pktgen_stop_device(pkt_dev);
3335 }
3336 }
3337
3338 /*
3339 * Main loop of the thread goes here
3340 */
3341
3342 static int pktgen_thread_worker(void *arg)
3343 {
3344 DEFINE_WAIT(wait);
3345 struct pktgen_thread *t = arg;
3346 struct pktgen_dev *pkt_dev = NULL;
3347 int cpu = t->cpu;
3348
3349 BUG_ON(smp_processor_id() != cpu);
3350
3351 init_waitqueue_head(&t->queue);
3352 complete(&t->start_done);
3353
3354 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3355
3356 set_current_state(TASK_INTERRUPTIBLE);
3357
3358 set_freezable();
3359
3360 while (!kthread_should_stop()) {
3361 pkt_dev = next_to_run(t);
3362
3363 if (unlikely(!pkt_dev && t->control == 0)) {
3364 if (t->net->pktgen_exiting)
3365 break;
3366 wait_event_interruptible_timeout(t->queue,
3367 t->control != 0,
3368 HZ/10);
3369 try_to_freeze();
3370 continue;
3371 }
3372
3373 __set_current_state(TASK_RUNNING);
3374
3375 if (likely(pkt_dev)) {
3376 pktgen_xmit(pkt_dev);
3377
3378 if (need_resched())
3379 pktgen_resched(pkt_dev);
3380 else
3381 cpu_relax();
3382 }
3383
3384 if (t->control & T_STOP) {
3385 pktgen_stop(t);
3386 t->control &= ~(T_STOP);
3387 }
3388
3389 if (t->control & T_RUN) {
3390 pktgen_run(t);
3391 t->control &= ~(T_RUN);
3392 }
3393
3394 if (t->control & T_REMDEVALL) {
3395 pktgen_rem_all_ifs(t);
3396 t->control &= ~(T_REMDEVALL);
3397 }
3398
3399 if (t->control & T_REMDEV) {
3400 pktgen_rem_one_if(t);
3401 t->control &= ~(T_REMDEV);
3402 }
3403
3404 try_to_freeze();
3405
3406 set_current_state(TASK_INTERRUPTIBLE);
3407 }
3408
3409 pr_debug("%s stopping all device\n", t->tsk->comm);
3410 pktgen_stop(t);
3411
3412 pr_debug("%s removing all device\n", t->tsk->comm);
3413 pktgen_rem_all_ifs(t);
3414
3415 pr_debug("%s removing thread\n", t->tsk->comm);
3416 pktgen_rem_thread(t);
3417
3418 /* Wait for kthread_stop */
3419 while (!kthread_should_stop()) {
3420 set_current_state(TASK_INTERRUPTIBLE);
3421 schedule();
3422 }
3423 __set_current_state(TASK_RUNNING);
3424
3425 return 0;
3426 }
3427
3428 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3429 const char *ifname, bool exact)
3430 {
3431 struct pktgen_dev *p, *pkt_dev = NULL;
3432 size_t len = strlen(ifname);
3433
3434 if_lock(t);
3435 list_for_each_entry(p, &t->if_list, list)
3436 if (strncmp(p->odevname, ifname, len) == 0) {
3437 if (p->odevname[len]) {
3438 if (exact || p->odevname[len] != '@')
3439 continue;
3440 }
3441 pkt_dev = p;
3442 break;
3443 }
3444
3445 if_unlock(t);
3446 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3447 return pkt_dev;
3448 }
3449
3450 /*
3451 * Adds a dev at front of if_list.
3452 */
3453
3454 static int add_dev_to_thread(struct pktgen_thread *t,
3455 struct pktgen_dev *pkt_dev)
3456 {
3457 int rv = 0;
3458
3459 if_lock(t);
3460
3461 if (pkt_dev->pg_thread) {
3462 pr_err("ERROR: already assigned to a thread\n");
3463 rv = -EBUSY;
3464 goto out;
3465 }
3466
3467 list_add(&pkt_dev->list, &t->if_list);
3468 pkt_dev->pg_thread = t;
3469 pkt_dev->running = 0;
3470
3471 out:
3472 if_unlock(t);
3473 return rv;
3474 }
3475
3476 /* Called under thread lock */
3477
3478 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3479 {
3480 struct pktgen_dev *pkt_dev;
3481 int err;
3482 int node = cpu_to_node(t->cpu);
3483
3484 /* We don't allow a device to be on several threads */
3485
3486 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND);
3487 if (pkt_dev) {
3488 pr_err("ERROR: interface already used\n");
3489 return -EBUSY;
3490 }
3491
3492 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3493 if (!pkt_dev)
3494 return -ENOMEM;
3495
3496 strcpy(pkt_dev->odevname, ifname);
3497 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3498 node);
3499 if (pkt_dev->flows == NULL) {
3500 kfree(pkt_dev);
3501 return -ENOMEM;
3502 }
3503
3504 pkt_dev->removal_mark = 0;
3505 pkt_dev->nfrags = 0;
3506 pkt_dev->delay = pg_delay_d;
3507 pkt_dev->count = pg_count_d;
3508 pkt_dev->sofar = 0;
3509 pkt_dev->udp_src_min = 9; /* sink port */
3510 pkt_dev->udp_src_max = 9;
3511 pkt_dev->udp_dst_min = 9;
3512 pkt_dev->udp_dst_max = 9;
3513 pkt_dev->vlan_p = 0;
3514 pkt_dev->vlan_cfi = 0;
3515 pkt_dev->vlan_id = 0xffff;
3516 pkt_dev->svlan_p = 0;
3517 pkt_dev->svlan_cfi = 0;
3518 pkt_dev->svlan_id = 0xffff;
3519 pkt_dev->node = -1;
3520
3521 err = pktgen_setup_dev(t->net, pkt_dev, ifname);
3522 if (err)
3523 goto out1;
3524 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3525 pkt_dev->clone_skb = pg_clone_skb_d;
3526
3527 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir,
3528 &pktgen_if_fops, pkt_dev);
3529 if (!pkt_dev->entry) {
3530 pr_err("cannot create %s/%s procfs entry\n",
3531 PG_PROC_DIR, ifname);
3532 err = -EINVAL;
3533 goto out2;
3534 }
3535 #ifdef CONFIG_XFRM
3536 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3537 pkt_dev->ipsproto = IPPROTO_ESP;
3538 #endif
3539
3540 return add_dev_to_thread(t, pkt_dev);
3541 out2:
3542 dev_put(pkt_dev->odev);
3543 out1:
3544 #ifdef CONFIG_XFRM
3545 free_SAs(pkt_dev);
3546 #endif
3547 vfree(pkt_dev->flows);
3548 kfree(pkt_dev);
3549 return err;
3550 }
3551
3552 static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
3553 {
3554 struct pktgen_thread *t;
3555 struct proc_dir_entry *pe;
3556 struct task_struct *p;
3557
3558 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3559 cpu_to_node(cpu));
3560 if (!t) {
3561 pr_err("ERROR: out of memory, can't create new thread\n");
3562 return -ENOMEM;
3563 }
3564
3565 spin_lock_init(&t->if_lock);
3566 t->cpu = cpu;
3567
3568 INIT_LIST_HEAD(&t->if_list);
3569
3570 list_add_tail(&t->th_list, &pn->pktgen_threads);
3571 init_completion(&t->start_done);
3572
3573 p = kthread_create_on_node(pktgen_thread_worker,
3574 t,
3575 cpu_to_node(cpu),
3576 "kpktgend_%d", cpu);
3577 if (IS_ERR(p)) {
3578 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3579 list_del(&t->th_list);
3580 kfree(t);
3581 return PTR_ERR(p);
3582 }
3583 kthread_bind(p, cpu);
3584 t->tsk = p;
3585
3586 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
3587 &pktgen_thread_fops, t);
3588 if (!pe) {
3589 pr_err("cannot create %s/%s procfs entry\n",
3590 PG_PROC_DIR, t->tsk->comm);
3591 kthread_stop(p);
3592 list_del(&t->th_list);
3593 kfree(t);
3594 return -EINVAL;
3595 }
3596
3597 t->net = pn;
3598 wake_up_process(p);
3599 wait_for_completion(&t->start_done);
3600
3601 return 0;
3602 }
3603
3604 /*
3605 * Removes a device from the thread if_list.
3606 */
3607 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3608 struct pktgen_dev *pkt_dev)
3609 {
3610 struct list_head *q, *n;
3611 struct pktgen_dev *p;
3612
3613 list_for_each_safe(q, n, &t->if_list) {
3614 p = list_entry(q, struct pktgen_dev, list);
3615 if (p == pkt_dev)
3616 list_del(&p->list);
3617 }
3618 }
3619
3620 static int pktgen_remove_device(struct pktgen_thread *t,
3621 struct pktgen_dev *pkt_dev)
3622 {
3623 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3624
3625 if (pkt_dev->running) {
3626 pr_warning("WARNING: trying to remove a running interface, stopping it now\n");
3627 pktgen_stop_device(pkt_dev);
3628 }
3629
3630 /* Dis-associate from the interface */
3631
3632 if (pkt_dev->odev) {
3633 dev_put(pkt_dev->odev);
3634 pkt_dev->odev = NULL;
3635 }
3636
3637 /* And update the thread if_list */
3638
3639 _rem_dev_from_if_list(t, pkt_dev);
3640
3641 if (pkt_dev->entry)
3642 proc_remove(pkt_dev->entry);
3643
3644 #ifdef CONFIG_XFRM
3645 free_SAs(pkt_dev);
3646 #endif
3647 vfree(pkt_dev->flows);
3648 if (pkt_dev->page)
3649 put_page(pkt_dev->page);
3650 kfree(pkt_dev);
3651 return 0;
3652 }
3653
3654 static int __net_init pg_net_init(struct net *net)
3655 {
3656 struct pktgen_net *pn = net_generic(net, pg_net_id);
3657 struct proc_dir_entry *pe;
3658 int cpu, ret = 0;
3659
3660 pn->net = net;
3661 INIT_LIST_HEAD(&pn->pktgen_threads);
3662 pn->pktgen_exiting = false;
3663 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net);
3664 if (!pn->proc_dir) {
3665 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR);
3666 return -ENODEV;
3667 }
3668 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops);
3669 if (pe == NULL) {
3670 pr_err("cannot create %s procfs entry\n", PGCTRL);
3671 ret = -EINVAL;
3672 goto remove;
3673 }
3674
3675 for_each_online_cpu(cpu) {
3676 int err;
3677
3678 err = pktgen_create_thread(cpu, pn);
3679 if (err)
3680 pr_warn("Cannot create thread for cpu %d (%d)\n",
3681 cpu, err);
3682 }
3683
3684 if (list_empty(&pn->pktgen_threads)) {
3685 pr_err("Initialization failed for all threads\n");
3686 ret = -ENODEV;
3687 goto remove_entry;
3688 }
3689
3690 return 0;
3691
3692 remove_entry:
3693 remove_proc_entry(PGCTRL, pn->proc_dir);
3694 remove:
3695 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3696 return ret;
3697 }
3698
3699 static void __net_exit pg_net_exit(struct net *net)
3700 {
3701 struct pktgen_net *pn = net_generic(net, pg_net_id);
3702 struct pktgen_thread *t;
3703 struct list_head *q, *n;
3704 LIST_HEAD(list);
3705
3706 /* Stop all interfaces & threads */
3707 pn->pktgen_exiting = true;
3708
3709 mutex_lock(&pktgen_thread_lock);
3710 list_splice_init(&pn->pktgen_threads, &list);
3711 mutex_unlock(&pktgen_thread_lock);
3712
3713 list_for_each_safe(q, n, &list) {
3714 t = list_entry(q, struct pktgen_thread, th_list);
3715 list_del(&t->th_list);
3716 kthread_stop(t->tsk);
3717 kfree(t);
3718 }
3719
3720 remove_proc_entry(PGCTRL, pn->proc_dir);
3721 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3722 }
3723
3724 static struct pernet_operations pg_net_ops = {
3725 .init = pg_net_init,
3726 .exit = pg_net_exit,
3727 .id = &pg_net_id,
3728 .size = sizeof(struct pktgen_net),
3729 };
3730
3731 static int __init pg_init(void)
3732 {
3733 int ret = 0;
3734
3735 pr_info("%s", version);
3736 ret = register_pernet_subsys(&pg_net_ops);
3737 if (ret)
3738 return ret;
3739 ret = register_netdevice_notifier(&pktgen_notifier_block);
3740 if (ret)
3741 unregister_pernet_subsys(&pg_net_ops);
3742
3743 return ret;
3744 }
3745
3746 static void __exit pg_cleanup(void)
3747 {
3748 unregister_netdevice_notifier(&pktgen_notifier_block);
3749 unregister_pernet_subsys(&pg_net_ops);
3750 }
3751
3752 module_init(pg_init);
3753 module_exit(pg_cleanup);
3754
3755 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3756 MODULE_DESCRIPTION("Packet Generator tool");
3757 MODULE_LICENSE("GPL");
3758 MODULE_VERSION(VERSION);
3759 module_param(pg_count_d, int, 0);
3760 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3761 module_param(pg_delay_d, int, 0);
3762 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3763 module_param(pg_clone_skb_d, int, 0);
3764 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3765 module_param(debug, int, 0);
3766 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
Linux with added FPC-III support