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[deliverable/linux.git] / net / core / pktgen.c
1 /*
2 * Authors:
3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
4 * Uppsala University and
5 * Swedish University of Agricultural Sciences
6 *
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 * Ben Greear <greearb@candelatech.com>
9 * Jens Låås <jens.laas@data.slu.se>
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 *
16 *
17 * A tool for loading the network with preconfigurated packets.
18 * The tool is implemented as a linux module. Parameters are output
19 * device, delay (to hard_xmit), number of packets, and whether
20 * to use multiple SKBs or just the same one.
21 * pktgen uses the installed interface's output routine.
22 *
23 * Additional hacking by:
24 *
25 * Jens.Laas@data.slu.se
26 * Improved by ANK. 010120.
27 * Improved by ANK even more. 010212.
28 * MAC address typo fixed. 010417 --ro
29 * Integrated. 020301 --DaveM
30 * Added multiskb option 020301 --DaveM
31 * Scaling of results. 020417--sigurdur@linpro.no
32 * Significant re-work of the module:
33 * * Convert to threaded model to more efficiently be able to transmit
34 * and receive on multiple interfaces at once.
35 * * Converted many counters to __u64 to allow longer runs.
36 * * Allow configuration of ranges, like min/max IP address, MACs,
37 * and UDP-ports, for both source and destination, and can
38 * set to use a random distribution or sequentially walk the range.
39 * * Can now change most values after starting.
40 * * Place 12-byte packet in UDP payload with magic number,
41 * sequence number, and timestamp.
42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and
43 * latencies (with micro-second) precision.
44 * * Add IOCTL interface to easily get counters & configuration.
45 * --Ben Greear <greearb@candelatech.com>
46 *
47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
49 * as a "fastpath" with a configurable number of clones after alloc's.
50 * clone_skb=0 means all packets are allocated this also means ranges time
51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
52 * clones.
53 *
54 * Also moved to /proc/net/pktgen/
55 * --ro
56 *
57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
58 * mistakes. Also merged in DaveM's patch in the -pre6 patch.
59 * --Ben Greear <greearb@candelatech.com>
60 *
61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
62 *
63 *
64 * 021124 Finished major redesign and rewrite for new functionality.
65 * See Documentation/networking/pktgen.txt for how to use this.
66 *
67 * The new operation:
68 * For each CPU one thread/process is created at start. This process checks
69 * for running devices in the if_list and sends packets until count is 0 it
70 * also the thread checks the thread->control which is used for inter-process
71 * communication. controlling process "posts" operations to the threads this
72 * way. The if_lock should be possible to remove when add/rem_device is merged
73 * into this too.
74 *
75 * By design there should only be *one* "controlling" process. In practice
76 * multiple write accesses gives unpredictable result. Understood by "write"
77 * to /proc gives result code thats should be read be the "writer".
78 * For practical use this should be no problem.
79 *
80 * Note when adding devices to a specific CPU there good idea to also assign
81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
82 * --ro
83 *
84 * Fix refcount off by one if first packet fails, potential null deref,
85 * memleak 030710- KJP
86 *
87 * First "ranges" functionality for ipv6 030726 --ro
88 *
89 * Included flow support. 030802 ANK.
90 *
91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
92 *
93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
95 *
96 * New xmit() return, do_div and misc clean up by Stephen Hemminger
97 * <shemminger@osdl.org> 040923
98 *
99 * Randy Dunlap fixed u64 printk compiler waring
100 *
101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
103 *
104 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
106 *
107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
108 * 050103
109 *
110 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
111 *
112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
113 *
114 * Fixed src_mac command to set source mac of packet to value specified in
115 * command by Adit Ranadive <adit.262@gmail.com>
116 *
117 */
118
119 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
120
121 #include <linux/sys.h>
122 #include <linux/types.h>
123 #include <linux/module.h>
124 #include <linux/moduleparam.h>
125 #include <linux/kernel.h>
126 #include <linux/mutex.h>
127 #include <linux/sched.h>
128 #include <linux/slab.h>
129 #include <linux/vmalloc.h>
130 #include <linux/unistd.h>
131 #include <linux/string.h>
132 #include <linux/ptrace.h>
133 #include <linux/errno.h>
134 #include <linux/ioport.h>
135 #include <linux/interrupt.h>
136 #include <linux/capability.h>
137 #include <linux/hrtimer.h>
138 #include <linux/freezer.h>
139 #include <linux/delay.h>
140 #include <linux/timer.h>
141 #include <linux/list.h>
142 #include <linux/init.h>
143 #include <linux/skbuff.h>
144 #include <linux/netdevice.h>
145 #include <linux/inet.h>
146 #include <linux/inetdevice.h>
147 #include <linux/rtnetlink.h>
148 #include <linux/if_arp.h>
149 #include <linux/if_vlan.h>
150 #include <linux/in.h>
151 #include <linux/ip.h>
152 #include <linux/ipv6.h>
153 #include <linux/udp.h>
154 #include <linux/proc_fs.h>
155 #include <linux/seq_file.h>
156 #include <linux/wait.h>
157 #include <linux/etherdevice.h>
158 #include <linux/kthread.h>
159 #include <linux/prefetch.h>
160 #include <net/net_namespace.h>
161 #include <net/checksum.h>
162 #include <net/ipv6.h>
163 #include <net/udp.h>
164 #include <net/ip6_checksum.h>
165 #include <net/addrconf.h>
166 #ifdef CONFIG_XFRM
167 #include <net/xfrm.h>
168 #endif
169 #include <net/netns/generic.h>
170 #include <asm/byteorder.h>
171 #include <linux/rcupdate.h>
172 #include <linux/bitops.h>
173 #include <linux/io.h>
174 #include <linux/timex.h>
175 #include <linux/uaccess.h>
176 #include <asm/dma.h>
177 #include <asm/div64.h> /* do_div */
178
179 #define VERSION "2.74"
180 #define IP_NAME_SZ 32
181 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
182 #define MPLS_STACK_BOTTOM htonl(0x00000100)
183
184 #define func_enter() pr_debug("entering %s\n", __func__);
185
186 /* Device flag bits */
187 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
188 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
189 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
190 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
191 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
192 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
193 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
194 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
195 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
196 #define F_VID_RND (1<<9) /* Random VLAN ID */
197 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
198 #define F_FLOW_SEQ (1<<11) /* Sequential flows */
199 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */
200 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
201 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
202 #define F_NODE (1<<15) /* Node memory alloc*/
203 #define F_UDPCSUM (1<<16) /* Include UDP checksum */
204
205 /* Thread control flag bits */
206 #define T_STOP (1<<0) /* Stop run */
207 #define T_RUN (1<<1) /* Start run */
208 #define T_REMDEVALL (1<<2) /* Remove all devs */
209 #define T_REMDEV (1<<3) /* Remove one dev */
210
211 /* If lock -- can be removed after some work */
212 #define if_lock(t) spin_lock(&(t->if_lock));
213 #define if_unlock(t) spin_unlock(&(t->if_lock));
214
215 /* Used to help with determining the pkts on receive */
216 #define PKTGEN_MAGIC 0xbe9be955
217 #define PG_PROC_DIR "pktgen"
218 #define PGCTRL "pgctrl"
219
220 #define MAX_CFLOWS 65536
221
222 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
223 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
224
225 struct flow_state {
226 __be32 cur_daddr;
227 int count;
228 #ifdef CONFIG_XFRM
229 struct xfrm_state *x;
230 #endif
231 __u32 flags;
232 };
233
234 /* flow flag bits */
235 #define F_INIT (1<<0) /* flow has been initialized */
236
237 struct pktgen_dev {
238 /*
239 * Try to keep frequent/infrequent used vars. separated.
240 */
241 struct proc_dir_entry *entry; /* proc file */
242 struct pktgen_thread *pg_thread;/* the owner */
243 struct list_head list; /* chaining in the thread's run-queue */
244
245 int running; /* if false, the test will stop */
246
247 /* If min != max, then we will either do a linear iteration, or
248 * we will do a random selection from within the range.
249 */
250 __u32 flags;
251 int removal_mark; /* non-zero => the device is marked for
252 * removal by worker thread */
253
254 int min_pkt_size;
255 int max_pkt_size;
256 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
257 int nfrags;
258 struct page *page;
259 u64 delay; /* nano-seconds */
260
261 __u64 count; /* Default No packets to send */
262 __u64 sofar; /* How many pkts we've sent so far */
263 __u64 tx_bytes; /* How many bytes we've transmitted */
264 __u64 errors; /* Errors when trying to transmit, */
265
266 /* runtime counters relating to clone_skb */
267
268 __u64 allocated_skbs;
269 __u32 clone_count;
270 int last_ok; /* Was last skb sent?
271 * Or a failed transmit of some sort?
272 * This will keep sequence numbers in order
273 */
274 ktime_t next_tx;
275 ktime_t started_at;
276 ktime_t stopped_at;
277 u64 idle_acc; /* nano-seconds */
278
279 __u32 seq_num;
280
281 int clone_skb; /*
282 * Use multiple SKBs during packet gen.
283 * If this number is greater than 1, then
284 * that many copies of the same packet will be
285 * sent before a new packet is allocated.
286 * If you want to send 1024 identical packets
287 * before creating a new packet,
288 * set clone_skb to 1024.
289 */
290
291 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
292 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
293 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
294 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
295
296 struct in6_addr in6_saddr;
297 struct in6_addr in6_daddr;
298 struct in6_addr cur_in6_daddr;
299 struct in6_addr cur_in6_saddr;
300 /* For ranges */
301 struct in6_addr min_in6_daddr;
302 struct in6_addr max_in6_daddr;
303 struct in6_addr min_in6_saddr;
304 struct in6_addr max_in6_saddr;
305
306 /* If we're doing ranges, random or incremental, then this
307 * defines the min/max for those ranges.
308 */
309 __be32 saddr_min; /* inclusive, source IP address */
310 __be32 saddr_max; /* exclusive, source IP address */
311 __be32 daddr_min; /* inclusive, dest IP address */
312 __be32 daddr_max; /* exclusive, dest IP address */
313
314 __u16 udp_src_min; /* inclusive, source UDP port */
315 __u16 udp_src_max; /* exclusive, source UDP port */
316 __u16 udp_dst_min; /* inclusive, dest UDP port */
317 __u16 udp_dst_max; /* exclusive, dest UDP port */
318
319 /* DSCP + ECN */
320 __u8 tos; /* six MSB of (former) IPv4 TOS
321 are for dscp codepoint */
322 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
323 (see RFC 3260, sec. 4) */
324
325 /* MPLS */
326 unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */
327 __be32 labels[MAX_MPLS_LABELS];
328
329 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
330 __u8 vlan_p;
331 __u8 vlan_cfi;
332 __u16 vlan_id; /* 0xffff means no vlan tag */
333
334 __u8 svlan_p;
335 __u8 svlan_cfi;
336 __u16 svlan_id; /* 0xffff means no svlan tag */
337
338 __u32 src_mac_count; /* How many MACs to iterate through */
339 __u32 dst_mac_count; /* How many MACs to iterate through */
340
341 unsigned char dst_mac[ETH_ALEN];
342 unsigned char src_mac[ETH_ALEN];
343
344 __u32 cur_dst_mac_offset;
345 __u32 cur_src_mac_offset;
346 __be32 cur_saddr;
347 __be32 cur_daddr;
348 __u16 ip_id;
349 __u16 cur_udp_dst;
350 __u16 cur_udp_src;
351 __u16 cur_queue_map;
352 __u32 cur_pkt_size;
353 __u32 last_pkt_size;
354
355 __u8 hh[14];
356 /* = {
357 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
358
359 We fill in SRC address later
360 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
361 0x08, 0x00
362 };
363 */
364 __u16 pad; /* pad out the hh struct to an even 16 bytes */
365
366 struct sk_buff *skb; /* skb we are to transmit next, used for when we
367 * are transmitting the same one multiple times
368 */
369 struct net_device *odev; /* The out-going device.
370 * Note that the device should have it's
371 * pg_info pointer pointing back to this
372 * device.
373 * Set when the user specifies the out-going
374 * device name (not when the inject is
375 * started as it used to do.)
376 */
377 char odevname[32];
378 struct flow_state *flows;
379 unsigned int cflows; /* Concurrent flows (config) */
380 unsigned int lflow; /* Flow length (config) */
381 unsigned int nflows; /* accumulated flows (stats) */
382 unsigned int curfl; /* current sequenced flow (state)*/
383
384 u16 queue_map_min;
385 u16 queue_map_max;
386 __u32 skb_priority; /* skb priority field */
387 int node; /* Memory node */
388
389 #ifdef CONFIG_XFRM
390 __u8 ipsmode; /* IPSEC mode (config) */
391 __u8 ipsproto; /* IPSEC type (config) */
392 __u32 spi;
393 struct dst_entry dst;
394 struct dst_ops dstops;
395 #endif
396 char result[512];
397 };
398
399 struct pktgen_hdr {
400 __be32 pgh_magic;
401 __be32 seq_num;
402 __be32 tv_sec;
403 __be32 tv_usec;
404 };
405
406
407 static int pg_net_id __read_mostly;
408
409 struct pktgen_net {
410 struct net *net;
411 struct proc_dir_entry *proc_dir;
412 struct list_head pktgen_threads;
413 bool pktgen_exiting;
414 };
415
416 struct pktgen_thread {
417 spinlock_t if_lock; /* for list of devices */
418 struct list_head if_list; /* All device here */
419 struct list_head th_list;
420 struct task_struct *tsk;
421 char result[512];
422
423 /* Field for thread to receive "posted" events terminate,
424 stop ifs etc. */
425
426 u32 control;
427 int cpu;
428
429 wait_queue_head_t queue;
430 struct completion start_done;
431 struct pktgen_net *net;
432 };
433
434 #define REMOVE 1
435 #define FIND 0
436
437 static const char version[] =
438 "Packet Generator for packet performance testing. "
439 "Version: " VERSION "\n";
440
441 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
442 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
443 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
444 const char *ifname, bool exact);
445 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
446 static void pktgen_run_all_threads(struct pktgen_net *pn);
447 static void pktgen_reset_all_threads(struct pktgen_net *pn);
448 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn);
449
450 static void pktgen_stop(struct pktgen_thread *t);
451 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
452
453 /* Module parameters, defaults. */
454 static int pg_count_d __read_mostly = 1000;
455 static int pg_delay_d __read_mostly;
456 static int pg_clone_skb_d __read_mostly;
457 static int debug __read_mostly;
458
459 static DEFINE_MUTEX(pktgen_thread_lock);
460
461 static struct notifier_block pktgen_notifier_block = {
462 .notifier_call = pktgen_device_event,
463 };
464
465 /*
466 * /proc handling functions
467 *
468 */
469
470 static int pgctrl_show(struct seq_file *seq, void *v)
471 {
472 seq_puts(seq, version);
473 return 0;
474 }
475
476 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
477 size_t count, loff_t *ppos)
478 {
479 int err = 0;
480 char data[128];
481 struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
482
483 if (!capable(CAP_NET_ADMIN)) {
484 err = -EPERM;
485 goto out;
486 }
487
488 if (count > sizeof(data))
489 count = sizeof(data);
490
491 if (copy_from_user(data, buf, count)) {
492 err = -EFAULT;
493 goto out;
494 }
495 data[count - 1] = 0; /* Make string */
496
497 if (!strcmp(data, "stop"))
498 pktgen_stop_all_threads_ifs(pn);
499
500 else if (!strcmp(data, "start"))
501 pktgen_run_all_threads(pn);
502
503 else if (!strcmp(data, "reset"))
504 pktgen_reset_all_threads(pn);
505
506 else
507 pr_warning("Unknown command: %s\n", data);
508
509 err = count;
510
511 out:
512 return err;
513 }
514
515 static int pgctrl_open(struct inode *inode, struct file *file)
516 {
517 return single_open(file, pgctrl_show, PDE_DATA(inode));
518 }
519
520 static const struct file_operations pktgen_fops = {
521 .owner = THIS_MODULE,
522 .open = pgctrl_open,
523 .read = seq_read,
524 .llseek = seq_lseek,
525 .write = pgctrl_write,
526 .release = single_release,
527 };
528
529 static int pktgen_if_show(struct seq_file *seq, void *v)
530 {
531 const struct pktgen_dev *pkt_dev = seq->private;
532 ktime_t stopped;
533 u64 idle;
534
535 seq_printf(seq,
536 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
537 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
538 pkt_dev->max_pkt_size);
539
540 seq_printf(seq,
541 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
542 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
543 pkt_dev->clone_skb, pkt_dev->odevname);
544
545 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
546 pkt_dev->lflow);
547
548 seq_printf(seq,
549 " queue_map_min: %u queue_map_max: %u\n",
550 pkt_dev->queue_map_min,
551 pkt_dev->queue_map_max);
552
553 if (pkt_dev->skb_priority)
554 seq_printf(seq, " skb_priority: %u\n",
555 pkt_dev->skb_priority);
556
557 if (pkt_dev->flags & F_IPV6) {
558 seq_printf(seq,
559 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
560 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
561 &pkt_dev->in6_saddr,
562 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
563 &pkt_dev->in6_daddr,
564 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
565 } else {
566 seq_printf(seq,
567 " dst_min: %s dst_max: %s\n",
568 pkt_dev->dst_min, pkt_dev->dst_max);
569 seq_printf(seq,
570 " src_min: %s src_max: %s\n",
571 pkt_dev->src_min, pkt_dev->src_max);
572 }
573
574 seq_puts(seq, " src_mac: ");
575
576 seq_printf(seq, "%pM ",
577 is_zero_ether_addr(pkt_dev->src_mac) ?
578 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
579
580 seq_printf(seq, "dst_mac: ");
581 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
582
583 seq_printf(seq,
584 " udp_src_min: %d udp_src_max: %d"
585 " udp_dst_min: %d udp_dst_max: %d\n",
586 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
587 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
588
589 seq_printf(seq,
590 " src_mac_count: %d dst_mac_count: %d\n",
591 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
592
593 if (pkt_dev->nr_labels) {
594 unsigned int i;
595 seq_printf(seq, " mpls: ");
596 for (i = 0; i < pkt_dev->nr_labels; i++)
597 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
598 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
599 }
600
601 if (pkt_dev->vlan_id != 0xffff)
602 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
603 pkt_dev->vlan_id, pkt_dev->vlan_p,
604 pkt_dev->vlan_cfi);
605
606 if (pkt_dev->svlan_id != 0xffff)
607 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
608 pkt_dev->svlan_id, pkt_dev->svlan_p,
609 pkt_dev->svlan_cfi);
610
611 if (pkt_dev->tos)
612 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
613
614 if (pkt_dev->traffic_class)
615 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
616
617 if (pkt_dev->node >= 0)
618 seq_printf(seq, " node: %d\n", pkt_dev->node);
619
620 seq_printf(seq, " Flags: ");
621
622 if (pkt_dev->flags & F_IPV6)
623 seq_printf(seq, "IPV6 ");
624
625 if (pkt_dev->flags & F_IPSRC_RND)
626 seq_printf(seq, "IPSRC_RND ");
627
628 if (pkt_dev->flags & F_IPDST_RND)
629 seq_printf(seq, "IPDST_RND ");
630
631 if (pkt_dev->flags & F_TXSIZE_RND)
632 seq_printf(seq, "TXSIZE_RND ");
633
634 if (pkt_dev->flags & F_UDPSRC_RND)
635 seq_printf(seq, "UDPSRC_RND ");
636
637 if (pkt_dev->flags & F_UDPDST_RND)
638 seq_printf(seq, "UDPDST_RND ");
639
640 if (pkt_dev->flags & F_UDPCSUM)
641 seq_printf(seq, "UDPCSUM ");
642
643 if (pkt_dev->flags & F_MPLS_RND)
644 seq_printf(seq, "MPLS_RND ");
645
646 if (pkt_dev->flags & F_QUEUE_MAP_RND)
647 seq_printf(seq, "QUEUE_MAP_RND ");
648
649 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
650 seq_printf(seq, "QUEUE_MAP_CPU ");
651
652 if (pkt_dev->cflows) {
653 if (pkt_dev->flags & F_FLOW_SEQ)
654 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
655 else
656 seq_printf(seq, "FLOW_RND ");
657 }
658
659 #ifdef CONFIG_XFRM
660 if (pkt_dev->flags & F_IPSEC_ON)
661 seq_printf(seq, "IPSEC ");
662 #endif
663
664 if (pkt_dev->flags & F_MACSRC_RND)
665 seq_printf(seq, "MACSRC_RND ");
666
667 if (pkt_dev->flags & F_MACDST_RND)
668 seq_printf(seq, "MACDST_RND ");
669
670 if (pkt_dev->flags & F_VID_RND)
671 seq_printf(seq, "VID_RND ");
672
673 if (pkt_dev->flags & F_SVID_RND)
674 seq_printf(seq, "SVID_RND ");
675
676 if (pkt_dev->flags & F_NODE)
677 seq_printf(seq, "NODE_ALLOC ");
678
679 seq_puts(seq, "\n");
680
681 /* not really stopped, more like last-running-at */
682 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at;
683 idle = pkt_dev->idle_acc;
684 do_div(idle, NSEC_PER_USEC);
685
686 seq_printf(seq,
687 "Current:\n pkts-sofar: %llu errors: %llu\n",
688 (unsigned long long)pkt_dev->sofar,
689 (unsigned long long)pkt_dev->errors);
690
691 seq_printf(seq,
692 " started: %lluus stopped: %lluus idle: %lluus\n",
693 (unsigned long long) ktime_to_us(pkt_dev->started_at),
694 (unsigned long long) ktime_to_us(stopped),
695 (unsigned long long) idle);
696
697 seq_printf(seq,
698 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
699 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
700 pkt_dev->cur_src_mac_offset);
701
702 if (pkt_dev->flags & F_IPV6) {
703 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
704 &pkt_dev->cur_in6_saddr,
705 &pkt_dev->cur_in6_daddr);
706 } else
707 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n",
708 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
709
710 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
711 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
712
713 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
714
715 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
716
717 if (pkt_dev->result[0])
718 seq_printf(seq, "Result: %s\n", pkt_dev->result);
719 else
720 seq_printf(seq, "Result: Idle\n");
721
722 return 0;
723 }
724
725
726 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
727 __u32 *num)
728 {
729 int i = 0;
730 *num = 0;
731
732 for (; i < maxlen; i++) {
733 int value;
734 char c;
735 *num <<= 4;
736 if (get_user(c, &user_buffer[i]))
737 return -EFAULT;
738 value = hex_to_bin(c);
739 if (value >= 0)
740 *num |= value;
741 else
742 break;
743 }
744 return i;
745 }
746
747 static int count_trail_chars(const char __user * user_buffer,
748 unsigned int maxlen)
749 {
750 int i;
751
752 for (i = 0; i < maxlen; i++) {
753 char c;
754 if (get_user(c, &user_buffer[i]))
755 return -EFAULT;
756 switch (c) {
757 case '\"':
758 case '\n':
759 case '\r':
760 case '\t':
761 case ' ':
762 case '=':
763 break;
764 default:
765 goto done;
766 }
767 }
768 done:
769 return i;
770 }
771
772 static long num_arg(const char __user *user_buffer, unsigned long maxlen,
773 unsigned long *num)
774 {
775 int i;
776 *num = 0;
777
778 for (i = 0; i < maxlen; i++) {
779 char c;
780 if (get_user(c, &user_buffer[i]))
781 return -EFAULT;
782 if ((c >= '0') && (c <= '9')) {
783 *num *= 10;
784 *num += c - '0';
785 } else
786 break;
787 }
788 return i;
789 }
790
791 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
792 {
793 int i;
794
795 for (i = 0; i < maxlen; i++) {
796 char c;
797 if (get_user(c, &user_buffer[i]))
798 return -EFAULT;
799 switch (c) {
800 case '\"':
801 case '\n':
802 case '\r':
803 case '\t':
804 case ' ':
805 goto done_str;
806 break;
807 default:
808 break;
809 }
810 }
811 done_str:
812 return i;
813 }
814
815 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
816 {
817 unsigned int n = 0;
818 char c;
819 ssize_t i = 0;
820 int len;
821
822 pkt_dev->nr_labels = 0;
823 do {
824 __u32 tmp;
825 len = hex32_arg(&buffer[i], 8, &tmp);
826 if (len <= 0)
827 return len;
828 pkt_dev->labels[n] = htonl(tmp);
829 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
830 pkt_dev->flags |= F_MPLS_RND;
831 i += len;
832 if (get_user(c, &buffer[i]))
833 return -EFAULT;
834 i++;
835 n++;
836 if (n >= MAX_MPLS_LABELS)
837 return -E2BIG;
838 } while (c == ',');
839
840 pkt_dev->nr_labels = n;
841 return i;
842 }
843
844 static ssize_t pktgen_if_write(struct file *file,
845 const char __user * user_buffer, size_t count,
846 loff_t * offset)
847 {
848 struct seq_file *seq = file->private_data;
849 struct pktgen_dev *pkt_dev = seq->private;
850 int i, max, len;
851 char name[16], valstr[32];
852 unsigned long value = 0;
853 char *pg_result = NULL;
854 int tmp = 0;
855 char buf[128];
856
857 pg_result = &(pkt_dev->result[0]);
858
859 if (count < 1) {
860 pr_warning("wrong command format\n");
861 return -EINVAL;
862 }
863
864 max = count;
865 tmp = count_trail_chars(user_buffer, max);
866 if (tmp < 0) {
867 pr_warning("illegal format\n");
868 return tmp;
869 }
870 i = tmp;
871
872 /* Read variable name */
873
874 len = strn_len(&user_buffer[i], sizeof(name) - 1);
875 if (len < 0)
876 return len;
877
878 memset(name, 0, sizeof(name));
879 if (copy_from_user(name, &user_buffer[i], len))
880 return -EFAULT;
881 i += len;
882
883 max = count - i;
884 len = count_trail_chars(&user_buffer[i], max);
885 if (len < 0)
886 return len;
887
888 i += len;
889
890 if (debug) {
891 size_t copy = min_t(size_t, count, 1023);
892 char tb[copy + 1];
893 if (copy_from_user(tb, user_buffer, copy))
894 return -EFAULT;
895 tb[copy] = 0;
896 pr_debug("%s,%lu buffer -:%s:-\n",
897 name, (unsigned long)count, tb);
898 }
899
900 if (!strcmp(name, "min_pkt_size")) {
901 len = num_arg(&user_buffer[i], 10, &value);
902 if (len < 0)
903 return len;
904
905 i += len;
906 if (value < 14 + 20 + 8)
907 value = 14 + 20 + 8;
908 if (value != pkt_dev->min_pkt_size) {
909 pkt_dev->min_pkt_size = value;
910 pkt_dev->cur_pkt_size = value;
911 }
912 sprintf(pg_result, "OK: min_pkt_size=%u",
913 pkt_dev->min_pkt_size);
914 return count;
915 }
916
917 if (!strcmp(name, "max_pkt_size")) {
918 len = num_arg(&user_buffer[i], 10, &value);
919 if (len < 0)
920 return len;
921
922 i += len;
923 if (value < 14 + 20 + 8)
924 value = 14 + 20 + 8;
925 if (value != pkt_dev->max_pkt_size) {
926 pkt_dev->max_pkt_size = value;
927 pkt_dev->cur_pkt_size = value;
928 }
929 sprintf(pg_result, "OK: max_pkt_size=%u",
930 pkt_dev->max_pkt_size);
931 return count;
932 }
933
934 /* Shortcut for min = max */
935
936 if (!strcmp(name, "pkt_size")) {
937 len = num_arg(&user_buffer[i], 10, &value);
938 if (len < 0)
939 return len;
940
941 i += len;
942 if (value < 14 + 20 + 8)
943 value = 14 + 20 + 8;
944 if (value != pkt_dev->min_pkt_size) {
945 pkt_dev->min_pkt_size = value;
946 pkt_dev->max_pkt_size = value;
947 pkt_dev->cur_pkt_size = value;
948 }
949 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
950 return count;
951 }
952
953 if (!strcmp(name, "debug")) {
954 len = num_arg(&user_buffer[i], 10, &value);
955 if (len < 0)
956 return len;
957
958 i += len;
959 debug = value;
960 sprintf(pg_result, "OK: debug=%u", debug);
961 return count;
962 }
963
964 if (!strcmp(name, "frags")) {
965 len = num_arg(&user_buffer[i], 10, &value);
966 if (len < 0)
967 return len;
968
969 i += len;
970 pkt_dev->nfrags = value;
971 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
972 return count;
973 }
974 if (!strcmp(name, "delay")) {
975 len = num_arg(&user_buffer[i], 10, &value);
976 if (len < 0)
977 return len;
978
979 i += len;
980 if (value == 0x7FFFFFFF)
981 pkt_dev->delay = ULLONG_MAX;
982 else
983 pkt_dev->delay = (u64)value;
984
985 sprintf(pg_result, "OK: delay=%llu",
986 (unsigned long long) pkt_dev->delay);
987 return count;
988 }
989 if (!strcmp(name, "rate")) {
990 len = num_arg(&user_buffer[i], 10, &value);
991 if (len < 0)
992 return len;
993
994 i += len;
995 if (!value)
996 return len;
997 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
998 if (debug)
999 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1000
1001 sprintf(pg_result, "OK: rate=%lu", value);
1002 return count;
1003 }
1004 if (!strcmp(name, "ratep")) {
1005 len = num_arg(&user_buffer[i], 10, &value);
1006 if (len < 0)
1007 return len;
1008
1009 i += len;
1010 if (!value)
1011 return len;
1012 pkt_dev->delay = NSEC_PER_SEC/value;
1013 if (debug)
1014 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1015
1016 sprintf(pg_result, "OK: rate=%lu", value);
1017 return count;
1018 }
1019 if (!strcmp(name, "udp_src_min")) {
1020 len = num_arg(&user_buffer[i], 10, &value);
1021 if (len < 0)
1022 return len;
1023
1024 i += len;
1025 if (value != pkt_dev->udp_src_min) {
1026 pkt_dev->udp_src_min = value;
1027 pkt_dev->cur_udp_src = value;
1028 }
1029 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1030 return count;
1031 }
1032 if (!strcmp(name, "udp_dst_min")) {
1033 len = num_arg(&user_buffer[i], 10, &value);
1034 if (len < 0)
1035 return len;
1036
1037 i += len;
1038 if (value != pkt_dev->udp_dst_min) {
1039 pkt_dev->udp_dst_min = value;
1040 pkt_dev->cur_udp_dst = value;
1041 }
1042 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1043 return count;
1044 }
1045 if (!strcmp(name, "udp_src_max")) {
1046 len = num_arg(&user_buffer[i], 10, &value);
1047 if (len < 0)
1048 return len;
1049
1050 i += len;
1051 if (value != pkt_dev->udp_src_max) {
1052 pkt_dev->udp_src_max = value;
1053 pkt_dev->cur_udp_src = value;
1054 }
1055 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1056 return count;
1057 }
1058 if (!strcmp(name, "udp_dst_max")) {
1059 len = num_arg(&user_buffer[i], 10, &value);
1060 if (len < 0)
1061 return len;
1062
1063 i += len;
1064 if (value != pkt_dev->udp_dst_max) {
1065 pkt_dev->udp_dst_max = value;
1066 pkt_dev->cur_udp_dst = value;
1067 }
1068 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1069 return count;
1070 }
1071 if (!strcmp(name, "clone_skb")) {
1072 len = num_arg(&user_buffer[i], 10, &value);
1073 if (len < 0)
1074 return len;
1075 if ((value > 0) &&
1076 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1077 return -ENOTSUPP;
1078 i += len;
1079 pkt_dev->clone_skb = value;
1080
1081 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1082 return count;
1083 }
1084 if (!strcmp(name, "count")) {
1085 len = num_arg(&user_buffer[i], 10, &value);
1086 if (len < 0)
1087 return len;
1088
1089 i += len;
1090 pkt_dev->count = value;
1091 sprintf(pg_result, "OK: count=%llu",
1092 (unsigned long long)pkt_dev->count);
1093 return count;
1094 }
1095 if (!strcmp(name, "src_mac_count")) {
1096 len = num_arg(&user_buffer[i], 10, &value);
1097 if (len < 0)
1098 return len;
1099
1100 i += len;
1101 if (pkt_dev->src_mac_count != value) {
1102 pkt_dev->src_mac_count = value;
1103 pkt_dev->cur_src_mac_offset = 0;
1104 }
1105 sprintf(pg_result, "OK: src_mac_count=%d",
1106 pkt_dev->src_mac_count);
1107 return count;
1108 }
1109 if (!strcmp(name, "dst_mac_count")) {
1110 len = num_arg(&user_buffer[i], 10, &value);
1111 if (len < 0)
1112 return len;
1113
1114 i += len;
1115 if (pkt_dev->dst_mac_count != value) {
1116 pkt_dev->dst_mac_count = value;
1117 pkt_dev->cur_dst_mac_offset = 0;
1118 }
1119 sprintf(pg_result, "OK: dst_mac_count=%d",
1120 pkt_dev->dst_mac_count);
1121 return count;
1122 }
1123 if (!strcmp(name, "node")) {
1124 len = num_arg(&user_buffer[i], 10, &value);
1125 if (len < 0)
1126 return len;
1127
1128 i += len;
1129
1130 if (node_possible(value)) {
1131 pkt_dev->node = value;
1132 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1133 if (pkt_dev->page) {
1134 put_page(pkt_dev->page);
1135 pkt_dev->page = NULL;
1136 }
1137 }
1138 else
1139 sprintf(pg_result, "ERROR: node not possible");
1140 return count;
1141 }
1142 if (!strcmp(name, "flag")) {
1143 char f[32];
1144 memset(f, 0, 32);
1145 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1146 if (len < 0)
1147 return len;
1148
1149 if (copy_from_user(f, &user_buffer[i], len))
1150 return -EFAULT;
1151 i += len;
1152 if (strcmp(f, "IPSRC_RND") == 0)
1153 pkt_dev->flags |= F_IPSRC_RND;
1154
1155 else if (strcmp(f, "!IPSRC_RND") == 0)
1156 pkt_dev->flags &= ~F_IPSRC_RND;
1157
1158 else if (strcmp(f, "TXSIZE_RND") == 0)
1159 pkt_dev->flags |= F_TXSIZE_RND;
1160
1161 else if (strcmp(f, "!TXSIZE_RND") == 0)
1162 pkt_dev->flags &= ~F_TXSIZE_RND;
1163
1164 else if (strcmp(f, "IPDST_RND") == 0)
1165 pkt_dev->flags |= F_IPDST_RND;
1166
1167 else if (strcmp(f, "!IPDST_RND") == 0)
1168 pkt_dev->flags &= ~F_IPDST_RND;
1169
1170 else if (strcmp(f, "UDPSRC_RND") == 0)
1171 pkt_dev->flags |= F_UDPSRC_RND;
1172
1173 else if (strcmp(f, "!UDPSRC_RND") == 0)
1174 pkt_dev->flags &= ~F_UDPSRC_RND;
1175
1176 else if (strcmp(f, "UDPDST_RND") == 0)
1177 pkt_dev->flags |= F_UDPDST_RND;
1178
1179 else if (strcmp(f, "!UDPDST_RND") == 0)
1180 pkt_dev->flags &= ~F_UDPDST_RND;
1181
1182 else if (strcmp(f, "MACSRC_RND") == 0)
1183 pkt_dev->flags |= F_MACSRC_RND;
1184
1185 else if (strcmp(f, "!MACSRC_RND") == 0)
1186 pkt_dev->flags &= ~F_MACSRC_RND;
1187
1188 else if (strcmp(f, "MACDST_RND") == 0)
1189 pkt_dev->flags |= F_MACDST_RND;
1190
1191 else if (strcmp(f, "!MACDST_RND") == 0)
1192 pkt_dev->flags &= ~F_MACDST_RND;
1193
1194 else if (strcmp(f, "MPLS_RND") == 0)
1195 pkt_dev->flags |= F_MPLS_RND;
1196
1197 else if (strcmp(f, "!MPLS_RND") == 0)
1198 pkt_dev->flags &= ~F_MPLS_RND;
1199
1200 else if (strcmp(f, "VID_RND") == 0)
1201 pkt_dev->flags |= F_VID_RND;
1202
1203 else if (strcmp(f, "!VID_RND") == 0)
1204 pkt_dev->flags &= ~F_VID_RND;
1205
1206 else if (strcmp(f, "SVID_RND") == 0)
1207 pkt_dev->flags |= F_SVID_RND;
1208
1209 else if (strcmp(f, "!SVID_RND") == 0)
1210 pkt_dev->flags &= ~F_SVID_RND;
1211
1212 else if (strcmp(f, "FLOW_SEQ") == 0)
1213 pkt_dev->flags |= F_FLOW_SEQ;
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_RND") == 0)
1219 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1220
1221 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1222 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1223
1224 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1225 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1226 #ifdef CONFIG_XFRM
1227 else if (strcmp(f, "IPSEC") == 0)
1228 pkt_dev->flags |= F_IPSEC_ON;
1229 #endif
1230
1231 else if (strcmp(f, "!IPV6") == 0)
1232 pkt_dev->flags &= ~F_IPV6;
1233
1234 else if (strcmp(f, "NODE_ALLOC") == 0)
1235 pkt_dev->flags |= F_NODE;
1236
1237 else if (strcmp(f, "!NODE_ALLOC") == 0)
1238 pkt_dev->flags &= ~F_NODE;
1239
1240 else if (strcmp(f, "UDPCSUM") == 0)
1241 pkt_dev->flags |= F_UDPCSUM;
1242
1243 else if (strcmp(f, "!UDPCSUM") == 0)
1244 pkt_dev->flags &= ~F_UDPCSUM;
1245
1246 else {
1247 sprintf(pg_result,
1248 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1249 f,
1250 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1251 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n");
1252 return count;
1253 }
1254 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1255 return count;
1256 }
1257 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1258 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1259 if (len < 0)
1260 return len;
1261
1262 if (copy_from_user(buf, &user_buffer[i], len))
1263 return -EFAULT;
1264 buf[len] = 0;
1265 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1266 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1267 strncpy(pkt_dev->dst_min, buf, len);
1268 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1269 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1270 }
1271 if (debug)
1272 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
1273 i += len;
1274 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1275 return count;
1276 }
1277 if (!strcmp(name, "dst_max")) {
1278 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1279 if (len < 0)
1280 return len;
1281
1282
1283 if (copy_from_user(buf, &user_buffer[i], len))
1284 return -EFAULT;
1285
1286 buf[len] = 0;
1287 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1288 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1289 strncpy(pkt_dev->dst_max, buf, len);
1290 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1291 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1292 }
1293 if (debug)
1294 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
1295 i += len;
1296 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1297 return count;
1298 }
1299 if (!strcmp(name, "dst6")) {
1300 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1301 if (len < 0)
1302 return len;
1303
1304 pkt_dev->flags |= F_IPV6;
1305
1306 if (copy_from_user(buf, &user_buffer[i], len))
1307 return -EFAULT;
1308 buf[len] = 0;
1309
1310 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
1311 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1312
1313 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1314
1315 if (debug)
1316 pr_debug("dst6 set to: %s\n", buf);
1317
1318 i += len;
1319 sprintf(pg_result, "OK: dst6=%s", buf);
1320 return count;
1321 }
1322 if (!strcmp(name, "dst6_min")) {
1323 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1324 if (len < 0)
1325 return len;
1326
1327 pkt_dev->flags |= F_IPV6;
1328
1329 if (copy_from_user(buf, &user_buffer[i], len))
1330 return -EFAULT;
1331 buf[len] = 0;
1332
1333 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
1334 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1335
1336 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
1337 if (debug)
1338 pr_debug("dst6_min set to: %s\n", buf);
1339
1340 i += len;
1341 sprintf(pg_result, "OK: dst6_min=%s", buf);
1342 return count;
1343 }
1344 if (!strcmp(name, "dst6_max")) {
1345 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1346 if (len < 0)
1347 return len;
1348
1349 pkt_dev->flags |= F_IPV6;
1350
1351 if (copy_from_user(buf, &user_buffer[i], len))
1352 return -EFAULT;
1353 buf[len] = 0;
1354
1355 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
1356 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1357
1358 if (debug)
1359 pr_debug("dst6_max set to: %s\n", buf);
1360
1361 i += len;
1362 sprintf(pg_result, "OK: dst6_max=%s", buf);
1363 return count;
1364 }
1365 if (!strcmp(name, "src6")) {
1366 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1367 if (len < 0)
1368 return len;
1369
1370 pkt_dev->flags |= F_IPV6;
1371
1372 if (copy_from_user(buf, &user_buffer[i], len))
1373 return -EFAULT;
1374 buf[len] = 0;
1375
1376 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
1377 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1378
1379 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1380
1381 if (debug)
1382 pr_debug("src6 set to: %s\n", buf);
1383
1384 i += len;
1385 sprintf(pg_result, "OK: src6=%s", buf);
1386 return count;
1387 }
1388 if (!strcmp(name, "src_min")) {
1389 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1390 if (len < 0)
1391 return len;
1392
1393 if (copy_from_user(buf, &user_buffer[i], len))
1394 return -EFAULT;
1395 buf[len] = 0;
1396 if (strcmp(buf, pkt_dev->src_min) != 0) {
1397 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1398 strncpy(pkt_dev->src_min, buf, len);
1399 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1400 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1401 }
1402 if (debug)
1403 pr_debug("src_min set to: %s\n", pkt_dev->src_min);
1404 i += len;
1405 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1406 return count;
1407 }
1408 if (!strcmp(name, "src_max")) {
1409 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1410 if (len < 0)
1411 return len;
1412
1413 if (copy_from_user(buf, &user_buffer[i], len))
1414 return -EFAULT;
1415 buf[len] = 0;
1416 if (strcmp(buf, pkt_dev->src_max) != 0) {
1417 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1418 strncpy(pkt_dev->src_max, buf, len);
1419 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1420 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1421 }
1422 if (debug)
1423 pr_debug("src_max set to: %s\n", pkt_dev->src_max);
1424 i += len;
1425 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1426 return count;
1427 }
1428 if (!strcmp(name, "dst_mac")) {
1429 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1430 if (len < 0)
1431 return len;
1432
1433 memset(valstr, 0, sizeof(valstr));
1434 if (copy_from_user(valstr, &user_buffer[i], len))
1435 return -EFAULT;
1436
1437 if (!mac_pton(valstr, pkt_dev->dst_mac))
1438 return -EINVAL;
1439 /* Set up Dest MAC */
1440 memcpy(&pkt_dev->hh[0], pkt_dev->dst_mac, ETH_ALEN);
1441
1442 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1443 return count;
1444 }
1445 if (!strcmp(name, "src_mac")) {
1446 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1447 if (len < 0)
1448 return len;
1449
1450 memset(valstr, 0, sizeof(valstr));
1451 if (copy_from_user(valstr, &user_buffer[i], len))
1452 return -EFAULT;
1453
1454 if (!mac_pton(valstr, pkt_dev->src_mac))
1455 return -EINVAL;
1456 /* Set up Src MAC */
1457 memcpy(&pkt_dev->hh[6], pkt_dev->src_mac, ETH_ALEN);
1458
1459 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1460 return count;
1461 }
1462
1463 if (!strcmp(name, "clear_counters")) {
1464 pktgen_clear_counters(pkt_dev);
1465 sprintf(pg_result, "OK: Clearing counters.\n");
1466 return count;
1467 }
1468
1469 if (!strcmp(name, "flows")) {
1470 len = num_arg(&user_buffer[i], 10, &value);
1471 if (len < 0)
1472 return len;
1473
1474 i += len;
1475 if (value > MAX_CFLOWS)
1476 value = MAX_CFLOWS;
1477
1478 pkt_dev->cflows = value;
1479 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1480 return count;
1481 }
1482
1483 if (!strcmp(name, "spi")) {
1484 len = num_arg(&user_buffer[i], 10, &value);
1485 if (len < 0)
1486 return len;
1487
1488 i += len;
1489 pkt_dev->spi = value;
1490 sprintf(pg_result, "OK: spi=%u", pkt_dev->spi);
1491 return count;
1492 }
1493
1494 if (!strcmp(name, "flowlen")) {
1495 len = num_arg(&user_buffer[i], 10, &value);
1496 if (len < 0)
1497 return len;
1498
1499 i += len;
1500 pkt_dev->lflow = value;
1501 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1502 return count;
1503 }
1504
1505 if (!strcmp(name, "queue_map_min")) {
1506 len = num_arg(&user_buffer[i], 5, &value);
1507 if (len < 0)
1508 return len;
1509
1510 i += len;
1511 pkt_dev->queue_map_min = value;
1512 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1513 return count;
1514 }
1515
1516 if (!strcmp(name, "queue_map_max")) {
1517 len = num_arg(&user_buffer[i], 5, &value);
1518 if (len < 0)
1519 return len;
1520
1521 i += len;
1522 pkt_dev->queue_map_max = value;
1523 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1524 return count;
1525 }
1526
1527 if (!strcmp(name, "mpls")) {
1528 unsigned int n, cnt;
1529
1530 len = get_labels(&user_buffer[i], pkt_dev);
1531 if (len < 0)
1532 return len;
1533 i += len;
1534 cnt = sprintf(pg_result, "OK: mpls=");
1535 for (n = 0; n < pkt_dev->nr_labels; n++)
1536 cnt += sprintf(pg_result + cnt,
1537 "%08x%s", ntohl(pkt_dev->labels[n]),
1538 n == pkt_dev->nr_labels-1 ? "" : ",");
1539
1540 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1541 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1542 pkt_dev->svlan_id = 0xffff;
1543
1544 if (debug)
1545 pr_debug("VLAN/SVLAN auto turned off\n");
1546 }
1547 return count;
1548 }
1549
1550 if (!strcmp(name, "vlan_id")) {
1551 len = num_arg(&user_buffer[i], 4, &value);
1552 if (len < 0)
1553 return len;
1554
1555 i += len;
1556 if (value <= 4095) {
1557 pkt_dev->vlan_id = value; /* turn on VLAN */
1558
1559 if (debug)
1560 pr_debug("VLAN turned on\n");
1561
1562 if (debug && pkt_dev->nr_labels)
1563 pr_debug("MPLS auto turned off\n");
1564
1565 pkt_dev->nr_labels = 0; /* turn off MPLS */
1566 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1567 } else {
1568 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1569 pkt_dev->svlan_id = 0xffff;
1570
1571 if (debug)
1572 pr_debug("VLAN/SVLAN turned off\n");
1573 }
1574 return count;
1575 }
1576
1577 if (!strcmp(name, "vlan_p")) {
1578 len = num_arg(&user_buffer[i], 1, &value);
1579 if (len < 0)
1580 return len;
1581
1582 i += len;
1583 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1584 pkt_dev->vlan_p = value;
1585 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1586 } else {
1587 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1588 }
1589 return count;
1590 }
1591
1592 if (!strcmp(name, "vlan_cfi")) {
1593 len = num_arg(&user_buffer[i], 1, &value);
1594 if (len < 0)
1595 return len;
1596
1597 i += len;
1598 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1599 pkt_dev->vlan_cfi = value;
1600 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1601 } else {
1602 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1603 }
1604 return count;
1605 }
1606
1607 if (!strcmp(name, "svlan_id")) {
1608 len = num_arg(&user_buffer[i], 4, &value);
1609 if (len < 0)
1610 return len;
1611
1612 i += len;
1613 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1614 pkt_dev->svlan_id = value; /* turn on SVLAN */
1615
1616 if (debug)
1617 pr_debug("SVLAN turned on\n");
1618
1619 if (debug && pkt_dev->nr_labels)
1620 pr_debug("MPLS auto turned off\n");
1621
1622 pkt_dev->nr_labels = 0; /* turn off MPLS */
1623 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1624 } else {
1625 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1626 pkt_dev->svlan_id = 0xffff;
1627
1628 if (debug)
1629 pr_debug("VLAN/SVLAN turned off\n");
1630 }
1631 return count;
1632 }
1633
1634 if (!strcmp(name, "svlan_p")) {
1635 len = num_arg(&user_buffer[i], 1, &value);
1636 if (len < 0)
1637 return len;
1638
1639 i += len;
1640 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1641 pkt_dev->svlan_p = value;
1642 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1643 } else {
1644 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1645 }
1646 return count;
1647 }
1648
1649 if (!strcmp(name, "svlan_cfi")) {
1650 len = num_arg(&user_buffer[i], 1, &value);
1651 if (len < 0)
1652 return len;
1653
1654 i += len;
1655 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1656 pkt_dev->svlan_cfi = value;
1657 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1658 } else {
1659 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1660 }
1661 return count;
1662 }
1663
1664 if (!strcmp(name, "tos")) {
1665 __u32 tmp_value = 0;
1666 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1667 if (len < 0)
1668 return len;
1669
1670 i += len;
1671 if (len == 2) {
1672 pkt_dev->tos = tmp_value;
1673 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1674 } else {
1675 sprintf(pg_result, "ERROR: tos must be 00-ff");
1676 }
1677 return count;
1678 }
1679
1680 if (!strcmp(name, "traffic_class")) {
1681 __u32 tmp_value = 0;
1682 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1683 if (len < 0)
1684 return len;
1685
1686 i += len;
1687 if (len == 2) {
1688 pkt_dev->traffic_class = tmp_value;
1689 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1690 } else {
1691 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1692 }
1693 return count;
1694 }
1695
1696 if (!strcmp(name, "skb_priority")) {
1697 len = num_arg(&user_buffer[i], 9, &value);
1698 if (len < 0)
1699 return len;
1700
1701 i += len;
1702 pkt_dev->skb_priority = value;
1703 sprintf(pg_result, "OK: skb_priority=%i",
1704 pkt_dev->skb_priority);
1705 return count;
1706 }
1707
1708 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1709 return -EINVAL;
1710 }
1711
1712 static int pktgen_if_open(struct inode *inode, struct file *file)
1713 {
1714 return single_open(file, pktgen_if_show, PDE_DATA(inode));
1715 }
1716
1717 static const struct file_operations pktgen_if_fops = {
1718 .owner = THIS_MODULE,
1719 .open = pktgen_if_open,
1720 .read = seq_read,
1721 .llseek = seq_lseek,
1722 .write = pktgen_if_write,
1723 .release = single_release,
1724 };
1725
1726 static int pktgen_thread_show(struct seq_file *seq, void *v)
1727 {
1728 struct pktgen_thread *t = seq->private;
1729 const struct pktgen_dev *pkt_dev;
1730
1731 BUG_ON(!t);
1732
1733 seq_printf(seq, "Running: ");
1734
1735 if_lock(t);
1736 list_for_each_entry(pkt_dev, &t->if_list, list)
1737 if (pkt_dev->running)
1738 seq_printf(seq, "%s ", pkt_dev->odevname);
1739
1740 seq_printf(seq, "\nStopped: ");
1741
1742 list_for_each_entry(pkt_dev, &t->if_list, list)
1743 if (!pkt_dev->running)
1744 seq_printf(seq, "%s ", pkt_dev->odevname);
1745
1746 if (t->result[0])
1747 seq_printf(seq, "\nResult: %s\n", t->result);
1748 else
1749 seq_printf(seq, "\nResult: NA\n");
1750
1751 if_unlock(t);
1752
1753 return 0;
1754 }
1755
1756 static ssize_t pktgen_thread_write(struct file *file,
1757 const char __user * user_buffer,
1758 size_t count, loff_t * offset)
1759 {
1760 struct seq_file *seq = file->private_data;
1761 struct pktgen_thread *t = seq->private;
1762 int i, max, len, ret;
1763 char name[40];
1764 char *pg_result;
1765
1766 if (count < 1) {
1767 // sprintf(pg_result, "Wrong command format");
1768 return -EINVAL;
1769 }
1770
1771 max = count;
1772 len = count_trail_chars(user_buffer, max);
1773 if (len < 0)
1774 return len;
1775
1776 i = len;
1777
1778 /* Read variable name */
1779
1780 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1781 if (len < 0)
1782 return len;
1783
1784 memset(name, 0, sizeof(name));
1785 if (copy_from_user(name, &user_buffer[i], len))
1786 return -EFAULT;
1787 i += len;
1788
1789 max = count - i;
1790 len = count_trail_chars(&user_buffer[i], max);
1791 if (len < 0)
1792 return len;
1793
1794 i += len;
1795
1796 if (debug)
1797 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
1798
1799 if (!t) {
1800 pr_err("ERROR: No thread\n");
1801 ret = -EINVAL;
1802 goto out;
1803 }
1804
1805 pg_result = &(t->result[0]);
1806
1807 if (!strcmp(name, "add_device")) {
1808 char f[32];
1809 memset(f, 0, 32);
1810 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1811 if (len < 0) {
1812 ret = len;
1813 goto out;
1814 }
1815 if (copy_from_user(f, &user_buffer[i], len))
1816 return -EFAULT;
1817 i += len;
1818 mutex_lock(&pktgen_thread_lock);
1819 ret = pktgen_add_device(t, f);
1820 mutex_unlock(&pktgen_thread_lock);
1821 if (!ret) {
1822 ret = count;
1823 sprintf(pg_result, "OK: add_device=%s", f);
1824 } else
1825 sprintf(pg_result, "ERROR: can not add device %s", f);
1826 goto out;
1827 }
1828
1829 if (!strcmp(name, "rem_device_all")) {
1830 mutex_lock(&pktgen_thread_lock);
1831 t->control |= T_REMDEVALL;
1832 mutex_unlock(&pktgen_thread_lock);
1833 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1834 ret = count;
1835 sprintf(pg_result, "OK: rem_device_all");
1836 goto out;
1837 }
1838
1839 if (!strcmp(name, "max_before_softirq")) {
1840 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1841 ret = count;
1842 goto out;
1843 }
1844
1845 ret = -EINVAL;
1846 out:
1847 return ret;
1848 }
1849
1850 static int pktgen_thread_open(struct inode *inode, struct file *file)
1851 {
1852 return single_open(file, pktgen_thread_show, PDE_DATA(inode));
1853 }
1854
1855 static const struct file_operations pktgen_thread_fops = {
1856 .owner = THIS_MODULE,
1857 .open = pktgen_thread_open,
1858 .read = seq_read,
1859 .llseek = seq_lseek,
1860 .write = pktgen_thread_write,
1861 .release = single_release,
1862 };
1863
1864 /* Think find or remove for NN */
1865 static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn,
1866 const char *ifname, int remove)
1867 {
1868 struct pktgen_thread *t;
1869 struct pktgen_dev *pkt_dev = NULL;
1870 bool exact = (remove == FIND);
1871
1872 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1873 pkt_dev = pktgen_find_dev(t, ifname, exact);
1874 if (pkt_dev) {
1875 if (remove) {
1876 if_lock(t);
1877 pkt_dev->removal_mark = 1;
1878 t->control |= T_REMDEV;
1879 if_unlock(t);
1880 }
1881 break;
1882 }
1883 }
1884 return pkt_dev;
1885 }
1886
1887 /*
1888 * mark a device for removal
1889 */
1890 static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname)
1891 {
1892 struct pktgen_dev *pkt_dev = NULL;
1893 const int max_tries = 10, msec_per_try = 125;
1894 int i = 0;
1895
1896 mutex_lock(&pktgen_thread_lock);
1897 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1898
1899 while (1) {
1900
1901 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE);
1902 if (pkt_dev == NULL)
1903 break; /* success */
1904
1905 mutex_unlock(&pktgen_thread_lock);
1906 pr_debug("%s: waiting for %s to disappear....\n",
1907 __func__, ifname);
1908 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1909 mutex_lock(&pktgen_thread_lock);
1910
1911 if (++i >= max_tries) {
1912 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1913 __func__, msec_per_try * i, ifname);
1914 break;
1915 }
1916
1917 }
1918
1919 mutex_unlock(&pktgen_thread_lock);
1920 }
1921
1922 static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev)
1923 {
1924 struct pktgen_thread *t;
1925
1926 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1927 struct pktgen_dev *pkt_dev;
1928
1929 list_for_each_entry(pkt_dev, &t->if_list, list) {
1930 if (pkt_dev->odev != dev)
1931 continue;
1932
1933 proc_remove(pkt_dev->entry);
1934
1935 pkt_dev->entry = proc_create_data(dev->name, 0600,
1936 pn->proc_dir,
1937 &pktgen_if_fops,
1938 pkt_dev);
1939 if (!pkt_dev->entry)
1940 pr_err("can't move proc entry for '%s'\n",
1941 dev->name);
1942 break;
1943 }
1944 }
1945 }
1946
1947 static int pktgen_device_event(struct notifier_block *unused,
1948 unsigned long event, void *ptr)
1949 {
1950 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1951 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id);
1952
1953 if (pn->pktgen_exiting)
1954 return NOTIFY_DONE;
1955
1956 /* It is OK that we do not hold the group lock right now,
1957 * as we run under the RTNL lock.
1958 */
1959
1960 switch (event) {
1961 case NETDEV_CHANGENAME:
1962 pktgen_change_name(pn, dev);
1963 break;
1964
1965 case NETDEV_UNREGISTER:
1966 pktgen_mark_device(pn, dev->name);
1967 break;
1968 }
1969
1970 return NOTIFY_DONE;
1971 }
1972
1973 static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn,
1974 struct pktgen_dev *pkt_dev,
1975 const char *ifname)
1976 {
1977 char b[IFNAMSIZ+5];
1978 int i;
1979
1980 for (i = 0; ifname[i] != '@'; i++) {
1981 if (i == IFNAMSIZ)
1982 break;
1983
1984 b[i] = ifname[i];
1985 }
1986 b[i] = 0;
1987
1988 return dev_get_by_name(pn->net, b);
1989 }
1990
1991
1992 /* Associate pktgen_dev with a device. */
1993
1994 static int pktgen_setup_dev(const struct pktgen_net *pn,
1995 struct pktgen_dev *pkt_dev, const char *ifname)
1996 {
1997 struct net_device *odev;
1998 int err;
1999
2000 /* Clean old setups */
2001 if (pkt_dev->odev) {
2002 dev_put(pkt_dev->odev);
2003 pkt_dev->odev = NULL;
2004 }
2005
2006 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname);
2007 if (!odev) {
2008 pr_err("no such netdevice: \"%s\"\n", ifname);
2009 return -ENODEV;
2010 }
2011
2012 if (odev->type != ARPHRD_ETHER) {
2013 pr_err("not an ethernet device: \"%s\"\n", ifname);
2014 err = -EINVAL;
2015 } else if (!netif_running(odev)) {
2016 pr_err("device is down: \"%s\"\n", ifname);
2017 err = -ENETDOWN;
2018 } else {
2019 pkt_dev->odev = odev;
2020 return 0;
2021 }
2022
2023 dev_put(odev);
2024 return err;
2025 }
2026
2027 /* Read pkt_dev from the interface and set up internal pktgen_dev
2028 * structure to have the right information to create/send packets
2029 */
2030 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2031 {
2032 int ntxq;
2033
2034 if (!pkt_dev->odev) {
2035 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2036 sprintf(pkt_dev->result,
2037 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2038 return;
2039 }
2040
2041 /* make sure that we don't pick a non-existing transmit queue */
2042 ntxq = pkt_dev->odev->real_num_tx_queues;
2043
2044 if (ntxq <= pkt_dev->queue_map_min) {
2045 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2046 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2047 pkt_dev->odevname);
2048 pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2049 }
2050 if (pkt_dev->queue_map_max >= ntxq) {
2051 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2052 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2053 pkt_dev->odevname);
2054 pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2055 }
2056
2057 /* Default to the interface's mac if not explicitly set. */
2058
2059 if (is_zero_ether_addr(pkt_dev->src_mac))
2060 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2061
2062 /* Set up Dest MAC */
2063 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2064
2065 if (pkt_dev->flags & F_IPV6) {
2066 int i, set = 0, err = 1;
2067 struct inet6_dev *idev;
2068
2069 if (pkt_dev->min_pkt_size == 0) {
2070 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
2071 + sizeof(struct udphdr)
2072 + sizeof(struct pktgen_hdr)
2073 + pkt_dev->pkt_overhead;
2074 }
2075
2076 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2077 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2078 set = 1;
2079 break;
2080 }
2081
2082 if (!set) {
2083
2084 /*
2085 * Use linklevel address if unconfigured.
2086 *
2087 * use ipv6_get_lladdr if/when it's get exported
2088 */
2089
2090 rcu_read_lock();
2091 idev = __in6_dev_get(pkt_dev->odev);
2092 if (idev) {
2093 struct inet6_ifaddr *ifp;
2094
2095 read_lock_bh(&idev->lock);
2096 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2097 if ((ifp->scope & IFA_LINK) &&
2098 !(ifp->flags & IFA_F_TENTATIVE)) {
2099 pkt_dev->cur_in6_saddr = ifp->addr;
2100 err = 0;
2101 break;
2102 }
2103 }
2104 read_unlock_bh(&idev->lock);
2105 }
2106 rcu_read_unlock();
2107 if (err)
2108 pr_err("ERROR: IPv6 link address not available\n");
2109 }
2110 } else {
2111 if (pkt_dev->min_pkt_size == 0) {
2112 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
2113 + sizeof(struct udphdr)
2114 + sizeof(struct pktgen_hdr)
2115 + pkt_dev->pkt_overhead;
2116 }
2117
2118 pkt_dev->saddr_min = 0;
2119 pkt_dev->saddr_max = 0;
2120 if (strlen(pkt_dev->src_min) == 0) {
2121
2122 struct in_device *in_dev;
2123
2124 rcu_read_lock();
2125 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2126 if (in_dev) {
2127 if (in_dev->ifa_list) {
2128 pkt_dev->saddr_min =
2129 in_dev->ifa_list->ifa_address;
2130 pkt_dev->saddr_max = pkt_dev->saddr_min;
2131 }
2132 }
2133 rcu_read_unlock();
2134 } else {
2135 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2136 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2137 }
2138
2139 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2140 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2141 }
2142 /* Initialize current values. */
2143 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2144 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
2145 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
2146
2147 pkt_dev->cur_dst_mac_offset = 0;
2148 pkt_dev->cur_src_mac_offset = 0;
2149 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2150 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2151 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2152 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2153 pkt_dev->nflows = 0;
2154 }
2155
2156
2157 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2158 {
2159 ktime_t start_time, end_time;
2160 s64 remaining;
2161 struct hrtimer_sleeper t;
2162
2163 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2164 hrtimer_set_expires(&t.timer, spin_until);
2165
2166 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2167 if (remaining <= 0) {
2168 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2169 return;
2170 }
2171
2172 start_time = ktime_get();
2173 if (remaining < 100000) {
2174 /* for small delays (<100us), just loop until limit is reached */
2175 do {
2176 end_time = ktime_get();
2177 } while (ktime_compare(end_time, spin_until) < 0);
2178 } else {
2179 /* see do_nanosleep */
2180 hrtimer_init_sleeper(&t, current);
2181 do {
2182 set_current_state(TASK_INTERRUPTIBLE);
2183 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2184 if (!hrtimer_active(&t.timer))
2185 t.task = NULL;
2186
2187 if (likely(t.task))
2188 schedule();
2189
2190 hrtimer_cancel(&t.timer);
2191 } while (t.task && pkt_dev->running && !signal_pending(current));
2192 __set_current_state(TASK_RUNNING);
2193 end_time = ktime_get();
2194 }
2195
2196 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2197 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2198 }
2199
2200 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2201 {
2202 pkt_dev->pkt_overhead = 0;
2203 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2204 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2205 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2206 }
2207
2208 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2209 {
2210 return !!(pkt_dev->flows[flow].flags & F_INIT);
2211 }
2212
2213 static inline int f_pick(struct pktgen_dev *pkt_dev)
2214 {
2215 int flow = pkt_dev->curfl;
2216
2217 if (pkt_dev->flags & F_FLOW_SEQ) {
2218 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2219 /* reset time */
2220 pkt_dev->flows[flow].count = 0;
2221 pkt_dev->flows[flow].flags = 0;
2222 pkt_dev->curfl += 1;
2223 if (pkt_dev->curfl >= pkt_dev->cflows)
2224 pkt_dev->curfl = 0; /*reset */
2225 }
2226 } else {
2227 flow = prandom_u32() % pkt_dev->cflows;
2228 pkt_dev->curfl = flow;
2229
2230 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2231 pkt_dev->flows[flow].count = 0;
2232 pkt_dev->flows[flow].flags = 0;
2233 }
2234 }
2235
2236 return pkt_dev->curfl;
2237 }
2238
2239
2240 #ifdef CONFIG_XFRM
2241 /* If there was already an IPSEC SA, we keep it as is, else
2242 * we go look for it ...
2243 */
2244 #define DUMMY_MARK 0
2245 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2246 {
2247 struct xfrm_state *x = pkt_dev->flows[flow].x;
2248 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
2249 if (!x) {
2250 /*slow path: we dont already have xfrm_state*/
2251 x = xfrm_stateonly_find(pn->net, DUMMY_MARK,
2252 (xfrm_address_t *)&pkt_dev->cur_daddr,
2253 (xfrm_address_t *)&pkt_dev->cur_saddr,
2254 AF_INET,
2255 pkt_dev->ipsmode,
2256 pkt_dev->ipsproto, 0);
2257 if (x) {
2258 pkt_dev->flows[flow].x = x;
2259 set_pkt_overhead(pkt_dev);
2260 pkt_dev->pkt_overhead += x->props.header_len;
2261 }
2262
2263 }
2264 }
2265 #endif
2266 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2267 {
2268
2269 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2270 pkt_dev->cur_queue_map = smp_processor_id();
2271
2272 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2273 __u16 t;
2274 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2275 t = prandom_u32() %
2276 (pkt_dev->queue_map_max -
2277 pkt_dev->queue_map_min + 1)
2278 + pkt_dev->queue_map_min;
2279 } else {
2280 t = pkt_dev->cur_queue_map + 1;
2281 if (t > pkt_dev->queue_map_max)
2282 t = pkt_dev->queue_map_min;
2283 }
2284 pkt_dev->cur_queue_map = t;
2285 }
2286 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2287 }
2288
2289 /* Increment/randomize headers according to flags and current values
2290 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2291 */
2292 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2293 {
2294 __u32 imn;
2295 __u32 imx;
2296 int flow = 0;
2297
2298 if (pkt_dev->cflows)
2299 flow = f_pick(pkt_dev);
2300
2301 /* Deal with source MAC */
2302 if (pkt_dev->src_mac_count > 1) {
2303 __u32 mc;
2304 __u32 tmp;
2305
2306 if (pkt_dev->flags & F_MACSRC_RND)
2307 mc = prandom_u32() % pkt_dev->src_mac_count;
2308 else {
2309 mc = pkt_dev->cur_src_mac_offset++;
2310 if (pkt_dev->cur_src_mac_offset >=
2311 pkt_dev->src_mac_count)
2312 pkt_dev->cur_src_mac_offset = 0;
2313 }
2314
2315 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2316 pkt_dev->hh[11] = tmp;
2317 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2318 pkt_dev->hh[10] = tmp;
2319 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2320 pkt_dev->hh[9] = tmp;
2321 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2322 pkt_dev->hh[8] = tmp;
2323 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2324 pkt_dev->hh[7] = tmp;
2325 }
2326
2327 /* Deal with Destination MAC */
2328 if (pkt_dev->dst_mac_count > 1) {
2329 __u32 mc;
2330 __u32 tmp;
2331
2332 if (pkt_dev->flags & F_MACDST_RND)
2333 mc = prandom_u32() % pkt_dev->dst_mac_count;
2334
2335 else {
2336 mc = pkt_dev->cur_dst_mac_offset++;
2337 if (pkt_dev->cur_dst_mac_offset >=
2338 pkt_dev->dst_mac_count) {
2339 pkt_dev->cur_dst_mac_offset = 0;
2340 }
2341 }
2342
2343 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2344 pkt_dev->hh[5] = tmp;
2345 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2346 pkt_dev->hh[4] = tmp;
2347 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2348 pkt_dev->hh[3] = tmp;
2349 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2350 pkt_dev->hh[2] = tmp;
2351 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2352 pkt_dev->hh[1] = tmp;
2353 }
2354
2355 if (pkt_dev->flags & F_MPLS_RND) {
2356 unsigned int i;
2357 for (i = 0; i < pkt_dev->nr_labels; i++)
2358 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2359 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2360 ((__force __be32)prandom_u32() &
2361 htonl(0x000fffff));
2362 }
2363
2364 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2365 pkt_dev->vlan_id = prandom_u32() & (4096 - 1);
2366 }
2367
2368 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2369 pkt_dev->svlan_id = prandom_u32() & (4096 - 1);
2370 }
2371
2372 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2373 if (pkt_dev->flags & F_UDPSRC_RND)
2374 pkt_dev->cur_udp_src = prandom_u32() %
2375 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2376 + pkt_dev->udp_src_min;
2377
2378 else {
2379 pkt_dev->cur_udp_src++;
2380 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2381 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2382 }
2383 }
2384
2385 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2386 if (pkt_dev->flags & F_UDPDST_RND) {
2387 pkt_dev->cur_udp_dst = prandom_u32() %
2388 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2389 + pkt_dev->udp_dst_min;
2390 } else {
2391 pkt_dev->cur_udp_dst++;
2392 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2393 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2394 }
2395 }
2396
2397 if (!(pkt_dev->flags & F_IPV6)) {
2398
2399 imn = ntohl(pkt_dev->saddr_min);
2400 imx = ntohl(pkt_dev->saddr_max);
2401 if (imn < imx) {
2402 __u32 t;
2403 if (pkt_dev->flags & F_IPSRC_RND)
2404 t = prandom_u32() % (imx - imn) + imn;
2405 else {
2406 t = ntohl(pkt_dev->cur_saddr);
2407 t++;
2408 if (t > imx)
2409 t = imn;
2410
2411 }
2412 pkt_dev->cur_saddr = htonl(t);
2413 }
2414
2415 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2416 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2417 } else {
2418 imn = ntohl(pkt_dev->daddr_min);
2419 imx = ntohl(pkt_dev->daddr_max);
2420 if (imn < imx) {
2421 __u32 t;
2422 __be32 s;
2423 if (pkt_dev->flags & F_IPDST_RND) {
2424
2425 do {
2426 t = prandom_u32() %
2427 (imx - imn) + imn;
2428 s = htonl(t);
2429 } while (ipv4_is_loopback(s) ||
2430 ipv4_is_multicast(s) ||
2431 ipv4_is_lbcast(s) ||
2432 ipv4_is_zeronet(s) ||
2433 ipv4_is_local_multicast(s));
2434 pkt_dev->cur_daddr = s;
2435 } else {
2436 t = ntohl(pkt_dev->cur_daddr);
2437 t++;
2438 if (t > imx) {
2439 t = imn;
2440 }
2441 pkt_dev->cur_daddr = htonl(t);
2442 }
2443 }
2444 if (pkt_dev->cflows) {
2445 pkt_dev->flows[flow].flags |= F_INIT;
2446 pkt_dev->flows[flow].cur_daddr =
2447 pkt_dev->cur_daddr;
2448 #ifdef CONFIG_XFRM
2449 if (pkt_dev->flags & F_IPSEC_ON)
2450 get_ipsec_sa(pkt_dev, flow);
2451 #endif
2452 pkt_dev->nflows++;
2453 }
2454 }
2455 } else { /* IPV6 * */
2456
2457 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
2458 int i;
2459
2460 /* Only random destinations yet */
2461
2462 for (i = 0; i < 4; i++) {
2463 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2464 (((__force __be32)prandom_u32() |
2465 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2466 pkt_dev->max_in6_daddr.s6_addr32[i]);
2467 }
2468 }
2469 }
2470
2471 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2472 __u32 t;
2473 if (pkt_dev->flags & F_TXSIZE_RND) {
2474 t = prandom_u32() %
2475 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2476 + pkt_dev->min_pkt_size;
2477 } else {
2478 t = pkt_dev->cur_pkt_size + 1;
2479 if (t > pkt_dev->max_pkt_size)
2480 t = pkt_dev->min_pkt_size;
2481 }
2482 pkt_dev->cur_pkt_size = t;
2483 }
2484
2485 set_cur_queue_map(pkt_dev);
2486
2487 pkt_dev->flows[flow].count++;
2488 }
2489
2490
2491 #ifdef CONFIG_XFRM
2492 u32 pktgen_dst_metrics[RTAX_MAX + 1] = {
2493
2494 [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */
2495 };
2496
2497 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2498 {
2499 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2500 int err = 0;
2501 struct net *net = dev_net(pkt_dev->odev);
2502
2503 if (!x)
2504 return 0;
2505 /* XXX: we dont support tunnel mode for now until
2506 * we resolve the dst issue */
2507 if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0))
2508 return 0;
2509
2510 /* But when user specify an valid SPI, transformation
2511 * supports both transport/tunnel mode + ESP/AH type.
2512 */
2513 if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0))
2514 skb->_skb_refdst = (unsigned long)&pkt_dev->dst | SKB_DST_NOREF;
2515
2516 rcu_read_lock_bh();
2517 err = x->outer_mode->output(x, skb);
2518 rcu_read_unlock_bh();
2519 if (err) {
2520 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR);
2521 goto error;
2522 }
2523 err = x->type->output(x, skb);
2524 if (err) {
2525 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR);
2526 goto error;
2527 }
2528 spin_lock_bh(&x->lock);
2529 x->curlft.bytes += skb->len;
2530 x->curlft.packets++;
2531 spin_unlock_bh(&x->lock);
2532 error:
2533 return err;
2534 }
2535
2536 static void free_SAs(struct pktgen_dev *pkt_dev)
2537 {
2538 if (pkt_dev->cflows) {
2539 /* let go of the SAs if we have them */
2540 int i;
2541 for (i = 0; i < pkt_dev->cflows; i++) {
2542 struct xfrm_state *x = pkt_dev->flows[i].x;
2543 if (x) {
2544 xfrm_state_put(x);
2545 pkt_dev->flows[i].x = NULL;
2546 }
2547 }
2548 }
2549 }
2550
2551 static int process_ipsec(struct pktgen_dev *pkt_dev,
2552 struct sk_buff *skb, __be16 protocol)
2553 {
2554 if (pkt_dev->flags & F_IPSEC_ON) {
2555 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2556 int nhead = 0;
2557 if (x) {
2558 int ret;
2559 __u8 *eth;
2560 struct iphdr *iph;
2561
2562 nhead = x->props.header_len - skb_headroom(skb);
2563 if (nhead > 0) {
2564 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2565 if (ret < 0) {
2566 pr_err("Error expanding ipsec packet %d\n",
2567 ret);
2568 goto err;
2569 }
2570 }
2571
2572 /* ipsec is not expecting ll header */
2573 skb_pull(skb, ETH_HLEN);
2574 ret = pktgen_output_ipsec(skb, pkt_dev);
2575 if (ret) {
2576 pr_err("Error creating ipsec packet %d\n", ret);
2577 goto err;
2578 }
2579 /* restore ll */
2580 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2581 memcpy(eth, pkt_dev->hh, 12);
2582 *(u16 *) &eth[12] = protocol;
2583
2584 /* Update IPv4 header len as well as checksum value */
2585 iph = ip_hdr(skb);
2586 iph->tot_len = htons(skb->len - ETH_HLEN);
2587 ip_send_check(iph);
2588 }
2589 }
2590 return 1;
2591 err:
2592 kfree_skb(skb);
2593 return 0;
2594 }
2595 #endif
2596
2597 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2598 {
2599 unsigned int i;
2600 for (i = 0; i < pkt_dev->nr_labels; i++)
2601 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2602
2603 mpls--;
2604 *mpls |= MPLS_STACK_BOTTOM;
2605 }
2606
2607 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2608 unsigned int prio)
2609 {
2610 return htons(id | (cfi << 12) | (prio << 13));
2611 }
2612
2613 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2614 int datalen)
2615 {
2616 struct timeval timestamp;
2617 struct pktgen_hdr *pgh;
2618
2619 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
2620 datalen -= sizeof(*pgh);
2621
2622 if (pkt_dev->nfrags <= 0) {
2623 memset(skb_put(skb, datalen), 0, datalen);
2624 } else {
2625 int frags = pkt_dev->nfrags;
2626 int i, len;
2627 int frag_len;
2628
2629
2630 if (frags > MAX_SKB_FRAGS)
2631 frags = MAX_SKB_FRAGS;
2632 len = datalen - frags * PAGE_SIZE;
2633 if (len > 0) {
2634 memset(skb_put(skb, len), 0, len);
2635 datalen = frags * PAGE_SIZE;
2636 }
2637
2638 i = 0;
2639 frag_len = (datalen/frags) < PAGE_SIZE ?
2640 (datalen/frags) : PAGE_SIZE;
2641 while (datalen > 0) {
2642 if (unlikely(!pkt_dev->page)) {
2643 int node = numa_node_id();
2644
2645 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2646 node = pkt_dev->node;
2647 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2648 if (!pkt_dev->page)
2649 break;
2650 }
2651 get_page(pkt_dev->page);
2652 skb_frag_set_page(skb, i, pkt_dev->page);
2653 skb_shinfo(skb)->frags[i].page_offset = 0;
2654 /*last fragment, fill rest of data*/
2655 if (i == (frags - 1))
2656 skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2657 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2658 else
2659 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2660 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2661 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2662 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2663 i++;
2664 skb_shinfo(skb)->nr_frags = i;
2665 }
2666 }
2667
2668 /* Stamp the time, and sequence number,
2669 * convert them to network byte order
2670 */
2671 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2672 pgh->seq_num = htonl(pkt_dev->seq_num);
2673
2674 do_gettimeofday(&timestamp);
2675 pgh->tv_sec = htonl(timestamp.tv_sec);
2676 pgh->tv_usec = htonl(timestamp.tv_usec);
2677 }
2678
2679 static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
2680 struct pktgen_dev *pkt_dev,
2681 unsigned int extralen)
2682 {
2683 struct sk_buff *skb = NULL;
2684 unsigned int size = pkt_dev->cur_pkt_size + 64 + extralen +
2685 pkt_dev->pkt_overhead;
2686
2687 if (pkt_dev->flags & F_NODE) {
2688 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id();
2689
2690 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node);
2691 if (likely(skb)) {
2692 skb_reserve(skb, NET_SKB_PAD);
2693 skb->dev = dev;
2694 }
2695 } else {
2696 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
2697 }
2698
2699 return skb;
2700 }
2701
2702 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2703 struct pktgen_dev *pkt_dev)
2704 {
2705 struct sk_buff *skb = NULL;
2706 __u8 *eth;
2707 struct udphdr *udph;
2708 int datalen, iplen;
2709 struct iphdr *iph;
2710 __be16 protocol = htons(ETH_P_IP);
2711 __be32 *mpls;
2712 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2713 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2714 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2715 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2716 u16 queue_map;
2717
2718 if (pkt_dev->nr_labels)
2719 protocol = htons(ETH_P_MPLS_UC);
2720
2721 if (pkt_dev->vlan_id != 0xffff)
2722 protocol = htons(ETH_P_8021Q);
2723
2724 /* Update any of the values, used when we're incrementing various
2725 * fields.
2726 */
2727 mod_cur_headers(pkt_dev);
2728 queue_map = pkt_dev->cur_queue_map;
2729
2730 datalen = (odev->hard_header_len + 16) & ~0xf;
2731
2732 skb = pktgen_alloc_skb(odev, pkt_dev, datalen);
2733 if (!skb) {
2734 sprintf(pkt_dev->result, "No memory");
2735 return NULL;
2736 }
2737
2738 prefetchw(skb->data);
2739 skb_reserve(skb, datalen);
2740
2741 /* Reserve for ethernet and IP header */
2742 eth = (__u8 *) skb_push(skb, 14);
2743 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2744 if (pkt_dev->nr_labels)
2745 mpls_push(mpls, pkt_dev);
2746
2747 if (pkt_dev->vlan_id != 0xffff) {
2748 if (pkt_dev->svlan_id != 0xffff) {
2749 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2750 *svlan_tci = build_tci(pkt_dev->svlan_id,
2751 pkt_dev->svlan_cfi,
2752 pkt_dev->svlan_p);
2753 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2754 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2755 }
2756 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2757 *vlan_tci = build_tci(pkt_dev->vlan_id,
2758 pkt_dev->vlan_cfi,
2759 pkt_dev->vlan_p);
2760 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2761 *vlan_encapsulated_proto = htons(ETH_P_IP);
2762 }
2763
2764 skb_set_mac_header(skb, 0);
2765 skb_set_network_header(skb, skb->len);
2766 iph = (struct iphdr *) skb_put(skb, sizeof(struct iphdr));
2767
2768 skb_set_transport_header(skb, skb->len);
2769 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2770 skb_set_queue_mapping(skb, queue_map);
2771 skb->priority = pkt_dev->skb_priority;
2772
2773 memcpy(eth, pkt_dev->hh, 12);
2774 *(__be16 *) & eth[12] = protocol;
2775
2776 /* Eth + IPh + UDPh + mpls */
2777 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2778 pkt_dev->pkt_overhead;
2779 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
2780 datalen = sizeof(struct pktgen_hdr);
2781
2782 udph->source = htons(pkt_dev->cur_udp_src);
2783 udph->dest = htons(pkt_dev->cur_udp_dst);
2784 udph->len = htons(datalen + 8); /* DATA + udphdr */
2785 udph->check = 0;
2786
2787 iph->ihl = 5;
2788 iph->version = 4;
2789 iph->ttl = 32;
2790 iph->tos = pkt_dev->tos;
2791 iph->protocol = IPPROTO_UDP; /* UDP */
2792 iph->saddr = pkt_dev->cur_saddr;
2793 iph->daddr = pkt_dev->cur_daddr;
2794 iph->id = htons(pkt_dev->ip_id);
2795 pkt_dev->ip_id++;
2796 iph->frag_off = 0;
2797 iplen = 20 + 8 + datalen;
2798 iph->tot_len = htons(iplen);
2799 ip_send_check(iph);
2800 skb->protocol = protocol;
2801 skb->dev = odev;
2802 skb->pkt_type = PACKET_HOST;
2803
2804 if (!(pkt_dev->flags & F_UDPCSUM)) {
2805 skb->ip_summed = CHECKSUM_NONE;
2806 } else if (odev->features & NETIF_F_V4_CSUM) {
2807 skb->ip_summed = CHECKSUM_PARTIAL;
2808 skb->csum = 0;
2809 udp4_hwcsum(skb, udph->source, udph->dest);
2810 } else {
2811 __wsum csum = udp_csum(skb);
2812
2813 /* add protocol-dependent pseudo-header */
2814 udph->check = csum_tcpudp_magic(udph->source, udph->dest,
2815 datalen + 8, IPPROTO_UDP, csum);
2816
2817 if (udph->check == 0)
2818 udph->check = CSUM_MANGLED_0;
2819 }
2820
2821 pktgen_finalize_skb(pkt_dev, skb, datalen);
2822
2823 #ifdef CONFIG_XFRM
2824 if (!process_ipsec(pkt_dev, skb, protocol))
2825 return NULL;
2826 #endif
2827
2828 return skb;
2829 }
2830
2831 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2832 struct pktgen_dev *pkt_dev)
2833 {
2834 struct sk_buff *skb = NULL;
2835 __u8 *eth;
2836 struct udphdr *udph;
2837 int datalen, udplen;
2838 struct ipv6hdr *iph;
2839 __be16 protocol = htons(ETH_P_IPV6);
2840 __be32 *mpls;
2841 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2842 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2843 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2844 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2845 u16 queue_map;
2846
2847 if (pkt_dev->nr_labels)
2848 protocol = htons(ETH_P_MPLS_UC);
2849
2850 if (pkt_dev->vlan_id != 0xffff)
2851 protocol = htons(ETH_P_8021Q);
2852
2853 /* Update any of the values, used when we're incrementing various
2854 * fields.
2855 */
2856 mod_cur_headers(pkt_dev);
2857 queue_map = pkt_dev->cur_queue_map;
2858
2859 skb = pktgen_alloc_skb(odev, pkt_dev, 16);
2860 if (!skb) {
2861 sprintf(pkt_dev->result, "No memory");
2862 return NULL;
2863 }
2864
2865 prefetchw(skb->data);
2866 skb_reserve(skb, 16);
2867
2868 /* Reserve for ethernet and IP header */
2869 eth = (__u8 *) skb_push(skb, 14);
2870 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2871 if (pkt_dev->nr_labels)
2872 mpls_push(mpls, pkt_dev);
2873
2874 if (pkt_dev->vlan_id != 0xffff) {
2875 if (pkt_dev->svlan_id != 0xffff) {
2876 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2877 *svlan_tci = build_tci(pkt_dev->svlan_id,
2878 pkt_dev->svlan_cfi,
2879 pkt_dev->svlan_p);
2880 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2881 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2882 }
2883 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2884 *vlan_tci = build_tci(pkt_dev->vlan_id,
2885 pkt_dev->vlan_cfi,
2886 pkt_dev->vlan_p);
2887 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2888 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2889 }
2890
2891 skb_set_mac_header(skb, 0);
2892 skb_set_network_header(skb, skb->len);
2893 iph = (struct ipv6hdr *) skb_put(skb, sizeof(struct ipv6hdr));
2894
2895 skb_set_transport_header(skb, skb->len);
2896 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2897 skb_set_queue_mapping(skb, queue_map);
2898 skb->priority = pkt_dev->skb_priority;
2899
2900 memcpy(eth, pkt_dev->hh, 12);
2901 *(__be16 *) &eth[12] = protocol;
2902
2903 /* Eth + IPh + UDPh + mpls */
2904 datalen = pkt_dev->cur_pkt_size - 14 -
2905 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2906 pkt_dev->pkt_overhead;
2907
2908 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
2909 datalen = sizeof(struct pktgen_hdr);
2910 net_info_ratelimited("increased datalen to %d\n", datalen);
2911 }
2912
2913 udplen = datalen + sizeof(struct udphdr);
2914 udph->source = htons(pkt_dev->cur_udp_src);
2915 udph->dest = htons(pkt_dev->cur_udp_dst);
2916 udph->len = htons(udplen);
2917 udph->check = 0;
2918
2919 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2920
2921 if (pkt_dev->traffic_class) {
2922 /* Version + traffic class + flow (0) */
2923 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2924 }
2925
2926 iph->hop_limit = 32;
2927
2928 iph->payload_len = htons(udplen);
2929 iph->nexthdr = IPPROTO_UDP;
2930
2931 iph->daddr = pkt_dev->cur_in6_daddr;
2932 iph->saddr = pkt_dev->cur_in6_saddr;
2933
2934 skb->protocol = protocol;
2935 skb->dev = odev;
2936 skb->pkt_type = PACKET_HOST;
2937
2938 if (!(pkt_dev->flags & F_UDPCSUM)) {
2939 skb->ip_summed = CHECKSUM_NONE;
2940 } else if (odev->features & NETIF_F_V6_CSUM) {
2941 skb->ip_summed = CHECKSUM_PARTIAL;
2942 skb->csum_start = skb_transport_header(skb) - skb->head;
2943 skb->csum_offset = offsetof(struct udphdr, check);
2944 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0);
2945 } else {
2946 __wsum csum = udp_csum(skb);
2947
2948 /* add protocol-dependent pseudo-header */
2949 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum);
2950
2951 if (udph->check == 0)
2952 udph->check = CSUM_MANGLED_0;
2953 }
2954
2955 pktgen_finalize_skb(pkt_dev, skb, datalen);
2956
2957 return skb;
2958 }
2959
2960 static struct sk_buff *fill_packet(struct net_device *odev,
2961 struct pktgen_dev *pkt_dev)
2962 {
2963 if (pkt_dev->flags & F_IPV6)
2964 return fill_packet_ipv6(odev, pkt_dev);
2965 else
2966 return fill_packet_ipv4(odev, pkt_dev);
2967 }
2968
2969 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2970 {
2971 pkt_dev->seq_num = 1;
2972 pkt_dev->idle_acc = 0;
2973 pkt_dev->sofar = 0;
2974 pkt_dev->tx_bytes = 0;
2975 pkt_dev->errors = 0;
2976 }
2977
2978 /* Set up structure for sending pkts, clear counters */
2979
2980 static void pktgen_run(struct pktgen_thread *t)
2981 {
2982 struct pktgen_dev *pkt_dev;
2983 int started = 0;
2984
2985 func_enter();
2986
2987 if_lock(t);
2988 list_for_each_entry(pkt_dev, &t->if_list, list) {
2989
2990 /*
2991 * setup odev and create initial packet.
2992 */
2993 pktgen_setup_inject(pkt_dev);
2994
2995 if (pkt_dev->odev) {
2996 pktgen_clear_counters(pkt_dev);
2997 pkt_dev->running = 1; /* Cranke yeself! */
2998 pkt_dev->skb = NULL;
2999 pkt_dev->started_at = pkt_dev->next_tx = ktime_get();
3000
3001 set_pkt_overhead(pkt_dev);
3002
3003 strcpy(pkt_dev->result, "Starting");
3004 started++;
3005 } else
3006 strcpy(pkt_dev->result, "Error starting");
3007 }
3008 if_unlock(t);
3009 if (started)
3010 t->control &= ~(T_STOP);
3011 }
3012
3013 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn)
3014 {
3015 struct pktgen_thread *t;
3016
3017 func_enter();
3018
3019 mutex_lock(&pktgen_thread_lock);
3020
3021 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3022 t->control |= T_STOP;
3023
3024 mutex_unlock(&pktgen_thread_lock);
3025 }
3026
3027 static int thread_is_running(const struct pktgen_thread *t)
3028 {
3029 const struct pktgen_dev *pkt_dev;
3030
3031 list_for_each_entry(pkt_dev, &t->if_list, list)
3032 if (pkt_dev->running)
3033 return 1;
3034 return 0;
3035 }
3036
3037 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3038 {
3039 if_lock(t);
3040
3041 while (thread_is_running(t)) {
3042
3043 if_unlock(t);
3044
3045 msleep_interruptible(100);
3046
3047 if (signal_pending(current))
3048 goto signal;
3049 if_lock(t);
3050 }
3051 if_unlock(t);
3052 return 1;
3053 signal:
3054 return 0;
3055 }
3056
3057 static int pktgen_wait_all_threads_run(struct pktgen_net *pn)
3058 {
3059 struct pktgen_thread *t;
3060 int sig = 1;
3061
3062 mutex_lock(&pktgen_thread_lock);
3063
3064 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
3065 sig = pktgen_wait_thread_run(t);
3066 if (sig == 0)
3067 break;
3068 }
3069
3070 if (sig == 0)
3071 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3072 t->control |= (T_STOP);
3073
3074 mutex_unlock(&pktgen_thread_lock);
3075 return sig;
3076 }
3077
3078 static void pktgen_run_all_threads(struct pktgen_net *pn)
3079 {
3080 struct pktgen_thread *t;
3081
3082 func_enter();
3083
3084 mutex_lock(&pktgen_thread_lock);
3085
3086 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3087 t->control |= (T_RUN);
3088
3089 mutex_unlock(&pktgen_thread_lock);
3090
3091 /* Propagate thread->control */
3092 schedule_timeout_interruptible(msecs_to_jiffies(125));
3093
3094 pktgen_wait_all_threads_run(pn);
3095 }
3096
3097 static void pktgen_reset_all_threads(struct pktgen_net *pn)
3098 {
3099 struct pktgen_thread *t;
3100
3101 func_enter();
3102
3103 mutex_lock(&pktgen_thread_lock);
3104
3105 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3106 t->control |= (T_REMDEVALL);
3107
3108 mutex_unlock(&pktgen_thread_lock);
3109
3110 /* Propagate thread->control */
3111 schedule_timeout_interruptible(msecs_to_jiffies(125));
3112
3113 pktgen_wait_all_threads_run(pn);
3114 }
3115
3116 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3117 {
3118 __u64 bps, mbps, pps;
3119 char *p = pkt_dev->result;
3120 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3121 pkt_dev->started_at);
3122 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3123
3124 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3125 (unsigned long long)ktime_to_us(elapsed),
3126 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3127 (unsigned long long)ktime_to_us(idle),
3128 (unsigned long long)pkt_dev->sofar,
3129 pkt_dev->cur_pkt_size, nr_frags);
3130
3131 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3132 ktime_to_ns(elapsed));
3133
3134 bps = pps * 8 * pkt_dev->cur_pkt_size;
3135
3136 mbps = bps;
3137 do_div(mbps, 1000000);
3138 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3139 (unsigned long long)pps,
3140 (unsigned long long)mbps,
3141 (unsigned long long)bps,
3142 (unsigned long long)pkt_dev->errors);
3143 }
3144
3145 /* Set stopped-at timer, remove from running list, do counters & statistics */
3146 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3147 {
3148 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3149
3150 if (!pkt_dev->running) {
3151 pr_warning("interface: %s is already stopped\n",
3152 pkt_dev->odevname);
3153 return -EINVAL;
3154 }
3155
3156 kfree_skb(pkt_dev->skb);
3157 pkt_dev->skb = NULL;
3158 pkt_dev->stopped_at = ktime_get();
3159 pkt_dev->running = 0;
3160
3161 show_results(pkt_dev, nr_frags);
3162
3163 return 0;
3164 }
3165
3166 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3167 {
3168 struct pktgen_dev *pkt_dev, *best = NULL;
3169
3170 if_lock(t);
3171
3172 list_for_each_entry(pkt_dev, &t->if_list, list) {
3173 if (!pkt_dev->running)
3174 continue;
3175 if (best == NULL)
3176 best = pkt_dev;
3177 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0)
3178 best = pkt_dev;
3179 }
3180 if_unlock(t);
3181 return best;
3182 }
3183
3184 static void pktgen_stop(struct pktgen_thread *t)
3185 {
3186 struct pktgen_dev *pkt_dev;
3187
3188 func_enter();
3189
3190 if_lock(t);
3191
3192 list_for_each_entry(pkt_dev, &t->if_list, list) {
3193 pktgen_stop_device(pkt_dev);
3194 }
3195
3196 if_unlock(t);
3197 }
3198
3199 /*
3200 * one of our devices needs to be removed - find it
3201 * and remove it
3202 */
3203 static void pktgen_rem_one_if(struct pktgen_thread *t)
3204 {
3205 struct list_head *q, *n;
3206 struct pktgen_dev *cur;
3207
3208 func_enter();
3209
3210 if_lock(t);
3211
3212 list_for_each_safe(q, n, &t->if_list) {
3213 cur = list_entry(q, struct pktgen_dev, list);
3214
3215 if (!cur->removal_mark)
3216 continue;
3217
3218 kfree_skb(cur->skb);
3219 cur->skb = NULL;
3220
3221 pktgen_remove_device(t, cur);
3222
3223 break;
3224 }
3225
3226 if_unlock(t);
3227 }
3228
3229 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3230 {
3231 struct list_head *q, *n;
3232 struct pktgen_dev *cur;
3233
3234 func_enter();
3235
3236 /* Remove all devices, free mem */
3237
3238 if_lock(t);
3239
3240 list_for_each_safe(q, n, &t->if_list) {
3241 cur = list_entry(q, struct pktgen_dev, list);
3242
3243 kfree_skb(cur->skb);
3244 cur->skb = NULL;
3245
3246 pktgen_remove_device(t, cur);
3247 }
3248
3249 if_unlock(t);
3250 }
3251
3252 static void pktgen_rem_thread(struct pktgen_thread *t)
3253 {
3254 /* Remove from the thread list */
3255 remove_proc_entry(t->tsk->comm, t->net->proc_dir);
3256 }
3257
3258 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3259 {
3260 ktime_t idle_start = ktime_get();
3261 schedule();
3262 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3263 }
3264
3265 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3266 {
3267 ktime_t idle_start = ktime_get();
3268
3269 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3270 if (signal_pending(current))
3271 break;
3272
3273 if (need_resched())
3274 pktgen_resched(pkt_dev);
3275 else
3276 cpu_relax();
3277 }
3278 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3279 }
3280
3281 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3282 {
3283 struct net_device *odev = pkt_dev->odev;
3284 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3285 = odev->netdev_ops->ndo_start_xmit;
3286 struct netdev_queue *txq;
3287 u16 queue_map;
3288 int ret;
3289
3290 /* If device is offline, then don't send */
3291 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3292 pktgen_stop_device(pkt_dev);
3293 return;
3294 }
3295
3296 /* This is max DELAY, this has special meaning of
3297 * "never transmit"
3298 */
3299 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3300 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
3301 return;
3302 }
3303
3304 /* If no skb or clone count exhausted then get new one */
3305 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3306 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3307 /* build a new pkt */
3308 kfree_skb(pkt_dev->skb);
3309
3310 pkt_dev->skb = fill_packet(odev, pkt_dev);
3311 if (pkt_dev->skb == NULL) {
3312 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3313 schedule();
3314 pkt_dev->clone_count--; /* back out increment, OOM */
3315 return;
3316 }
3317 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3318 pkt_dev->allocated_skbs++;
3319 pkt_dev->clone_count = 0; /* reset counter */
3320 }
3321
3322 if (pkt_dev->delay && pkt_dev->last_ok)
3323 spin(pkt_dev, pkt_dev->next_tx);
3324
3325 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3326 txq = netdev_get_tx_queue(odev, queue_map);
3327
3328 __netif_tx_lock_bh(txq);
3329
3330 if (unlikely(netif_xmit_frozen_or_stopped(txq))) {
3331 ret = NETDEV_TX_BUSY;
3332 pkt_dev->last_ok = 0;
3333 goto unlock;
3334 }
3335 atomic_inc(&(pkt_dev->skb->users));
3336 ret = (*xmit)(pkt_dev->skb, odev);
3337
3338 switch (ret) {
3339 case NETDEV_TX_OK:
3340 txq_trans_update(txq);
3341 pkt_dev->last_ok = 1;
3342 pkt_dev->sofar++;
3343 pkt_dev->seq_num++;
3344 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3345 break;
3346 case NET_XMIT_DROP:
3347 case NET_XMIT_CN:
3348 case NET_XMIT_POLICED:
3349 /* skb has been consumed */
3350 pkt_dev->errors++;
3351 break;
3352 default: /* Drivers are not supposed to return other values! */
3353 net_info_ratelimited("%s xmit error: %d\n",
3354 pkt_dev->odevname, ret);
3355 pkt_dev->errors++;
3356 /* fallthru */
3357 case NETDEV_TX_LOCKED:
3358 case NETDEV_TX_BUSY:
3359 /* Retry it next time */
3360 atomic_dec(&(pkt_dev->skb->users));
3361 pkt_dev->last_ok = 0;
3362 }
3363 unlock:
3364 __netif_tx_unlock_bh(txq);
3365
3366 /* If pkt_dev->count is zero, then run forever */
3367 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3368 pktgen_wait_for_skb(pkt_dev);
3369
3370 /* Done with this */
3371 pktgen_stop_device(pkt_dev);
3372 }
3373 }
3374
3375 /*
3376 * Main loop of the thread goes here
3377 */
3378
3379 static int pktgen_thread_worker(void *arg)
3380 {
3381 DEFINE_WAIT(wait);
3382 struct pktgen_thread *t = arg;
3383 struct pktgen_dev *pkt_dev = NULL;
3384 int cpu = t->cpu;
3385
3386 BUG_ON(smp_processor_id() != cpu);
3387
3388 init_waitqueue_head(&t->queue);
3389 complete(&t->start_done);
3390
3391 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3392
3393 set_current_state(TASK_INTERRUPTIBLE);
3394
3395 set_freezable();
3396
3397 while (!kthread_should_stop()) {
3398 pkt_dev = next_to_run(t);
3399
3400 if (unlikely(!pkt_dev && t->control == 0)) {
3401 if (t->net->pktgen_exiting)
3402 break;
3403 wait_event_interruptible_timeout(t->queue,
3404 t->control != 0,
3405 HZ/10);
3406 try_to_freeze();
3407 continue;
3408 }
3409
3410 __set_current_state(TASK_RUNNING);
3411
3412 if (likely(pkt_dev)) {
3413 pktgen_xmit(pkt_dev);
3414
3415 if (need_resched())
3416 pktgen_resched(pkt_dev);
3417 else
3418 cpu_relax();
3419 }
3420
3421 if (t->control & T_STOP) {
3422 pktgen_stop(t);
3423 t->control &= ~(T_STOP);
3424 }
3425
3426 if (t->control & T_RUN) {
3427 pktgen_run(t);
3428 t->control &= ~(T_RUN);
3429 }
3430
3431 if (t->control & T_REMDEVALL) {
3432 pktgen_rem_all_ifs(t);
3433 t->control &= ~(T_REMDEVALL);
3434 }
3435
3436 if (t->control & T_REMDEV) {
3437 pktgen_rem_one_if(t);
3438 t->control &= ~(T_REMDEV);
3439 }
3440
3441 try_to_freeze();
3442
3443 set_current_state(TASK_INTERRUPTIBLE);
3444 }
3445
3446 pr_debug("%s stopping all device\n", t->tsk->comm);
3447 pktgen_stop(t);
3448
3449 pr_debug("%s removing all device\n", t->tsk->comm);
3450 pktgen_rem_all_ifs(t);
3451
3452 pr_debug("%s removing thread\n", t->tsk->comm);
3453 pktgen_rem_thread(t);
3454
3455 /* Wait for kthread_stop */
3456 while (!kthread_should_stop()) {
3457 set_current_state(TASK_INTERRUPTIBLE);
3458 schedule();
3459 }
3460 __set_current_state(TASK_RUNNING);
3461
3462 return 0;
3463 }
3464
3465 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3466 const char *ifname, bool exact)
3467 {
3468 struct pktgen_dev *p, *pkt_dev = NULL;
3469 size_t len = strlen(ifname);
3470
3471 if_lock(t);
3472 list_for_each_entry(p, &t->if_list, list)
3473 if (strncmp(p->odevname, ifname, len) == 0) {
3474 if (p->odevname[len]) {
3475 if (exact || p->odevname[len] != '@')
3476 continue;
3477 }
3478 pkt_dev = p;
3479 break;
3480 }
3481
3482 if_unlock(t);
3483 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3484 return pkt_dev;
3485 }
3486
3487 /*
3488 * Adds a dev at front of if_list.
3489 */
3490
3491 static int add_dev_to_thread(struct pktgen_thread *t,
3492 struct pktgen_dev *pkt_dev)
3493 {
3494 int rv = 0;
3495
3496 if_lock(t);
3497
3498 if (pkt_dev->pg_thread) {
3499 pr_err("ERROR: already assigned to a thread\n");
3500 rv = -EBUSY;
3501 goto out;
3502 }
3503
3504 list_add(&pkt_dev->list, &t->if_list);
3505 pkt_dev->pg_thread = t;
3506 pkt_dev->running = 0;
3507
3508 out:
3509 if_unlock(t);
3510 return rv;
3511 }
3512
3513 /* Called under thread lock */
3514
3515 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3516 {
3517 struct pktgen_dev *pkt_dev;
3518 int err;
3519 int node = cpu_to_node(t->cpu);
3520
3521 /* We don't allow a device to be on several threads */
3522
3523 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND);
3524 if (pkt_dev) {
3525 pr_err("ERROR: interface already used\n");
3526 return -EBUSY;
3527 }
3528
3529 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3530 if (!pkt_dev)
3531 return -ENOMEM;
3532
3533 strcpy(pkt_dev->odevname, ifname);
3534 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3535 node);
3536 if (pkt_dev->flows == NULL) {
3537 kfree(pkt_dev);
3538 return -ENOMEM;
3539 }
3540
3541 pkt_dev->removal_mark = 0;
3542 pkt_dev->nfrags = 0;
3543 pkt_dev->delay = pg_delay_d;
3544 pkt_dev->count = pg_count_d;
3545 pkt_dev->sofar = 0;
3546 pkt_dev->udp_src_min = 9; /* sink port */
3547 pkt_dev->udp_src_max = 9;
3548 pkt_dev->udp_dst_min = 9;
3549 pkt_dev->udp_dst_max = 9;
3550 pkt_dev->vlan_p = 0;
3551 pkt_dev->vlan_cfi = 0;
3552 pkt_dev->vlan_id = 0xffff;
3553 pkt_dev->svlan_p = 0;
3554 pkt_dev->svlan_cfi = 0;
3555 pkt_dev->svlan_id = 0xffff;
3556 pkt_dev->node = -1;
3557
3558 err = pktgen_setup_dev(t->net, pkt_dev, ifname);
3559 if (err)
3560 goto out1;
3561 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3562 pkt_dev->clone_skb = pg_clone_skb_d;
3563
3564 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir,
3565 &pktgen_if_fops, pkt_dev);
3566 if (!pkt_dev->entry) {
3567 pr_err("cannot create %s/%s procfs entry\n",
3568 PG_PROC_DIR, ifname);
3569 err = -EINVAL;
3570 goto out2;
3571 }
3572 #ifdef CONFIG_XFRM
3573 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3574 pkt_dev->ipsproto = IPPROTO_ESP;
3575
3576 /* xfrm tunnel mode needs additional dst to extract outter
3577 * ip header protocol/ttl/id field, here creat a phony one.
3578 * instead of looking for a valid rt, which definitely hurting
3579 * performance under such circumstance.
3580 */
3581 pkt_dev->dstops.family = AF_INET;
3582 pkt_dev->dst.dev = pkt_dev->odev;
3583 dst_init_metrics(&pkt_dev->dst, pktgen_dst_metrics, false);
3584 pkt_dev->dst.child = &pkt_dev->dst;
3585 pkt_dev->dst.ops = &pkt_dev->dstops;
3586 #endif
3587
3588 return add_dev_to_thread(t, pkt_dev);
3589 out2:
3590 dev_put(pkt_dev->odev);
3591 out1:
3592 #ifdef CONFIG_XFRM
3593 free_SAs(pkt_dev);
3594 #endif
3595 vfree(pkt_dev->flows);
3596 kfree(pkt_dev);
3597 return err;
3598 }
3599
3600 static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
3601 {
3602 struct pktgen_thread *t;
3603 struct proc_dir_entry *pe;
3604 struct task_struct *p;
3605
3606 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3607 cpu_to_node(cpu));
3608 if (!t) {
3609 pr_err("ERROR: out of memory, can't create new thread\n");
3610 return -ENOMEM;
3611 }
3612
3613 spin_lock_init(&t->if_lock);
3614 t->cpu = cpu;
3615
3616 INIT_LIST_HEAD(&t->if_list);
3617
3618 list_add_tail(&t->th_list, &pn->pktgen_threads);
3619 init_completion(&t->start_done);
3620
3621 p = kthread_create_on_node(pktgen_thread_worker,
3622 t,
3623 cpu_to_node(cpu),
3624 "kpktgend_%d", cpu);
3625 if (IS_ERR(p)) {
3626 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3627 list_del(&t->th_list);
3628 kfree(t);
3629 return PTR_ERR(p);
3630 }
3631 kthread_bind(p, cpu);
3632 t->tsk = p;
3633
3634 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
3635 &pktgen_thread_fops, t);
3636 if (!pe) {
3637 pr_err("cannot create %s/%s procfs entry\n",
3638 PG_PROC_DIR, t->tsk->comm);
3639 kthread_stop(p);
3640 list_del(&t->th_list);
3641 kfree(t);
3642 return -EINVAL;
3643 }
3644
3645 t->net = pn;
3646 wake_up_process(p);
3647 wait_for_completion(&t->start_done);
3648
3649 return 0;
3650 }
3651
3652 /*
3653 * Removes a device from the thread if_list.
3654 */
3655 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3656 struct pktgen_dev *pkt_dev)
3657 {
3658 struct list_head *q, *n;
3659 struct pktgen_dev *p;
3660
3661 list_for_each_safe(q, n, &t->if_list) {
3662 p = list_entry(q, struct pktgen_dev, list);
3663 if (p == pkt_dev)
3664 list_del(&p->list);
3665 }
3666 }
3667
3668 static int pktgen_remove_device(struct pktgen_thread *t,
3669 struct pktgen_dev *pkt_dev)
3670 {
3671 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3672
3673 if (pkt_dev->running) {
3674 pr_warning("WARNING: trying to remove a running interface, stopping it now\n");
3675 pktgen_stop_device(pkt_dev);
3676 }
3677
3678 /* Dis-associate from the interface */
3679
3680 if (pkt_dev->odev) {
3681 dev_put(pkt_dev->odev);
3682 pkt_dev->odev = NULL;
3683 }
3684
3685 /* And update the thread if_list */
3686
3687 _rem_dev_from_if_list(t, pkt_dev);
3688
3689 if (pkt_dev->entry)
3690 proc_remove(pkt_dev->entry);
3691
3692 #ifdef CONFIG_XFRM
3693 free_SAs(pkt_dev);
3694 #endif
3695 vfree(pkt_dev->flows);
3696 if (pkt_dev->page)
3697 put_page(pkt_dev->page);
3698 kfree(pkt_dev);
3699 return 0;
3700 }
3701
3702 static int __net_init pg_net_init(struct net *net)
3703 {
3704 struct pktgen_net *pn = net_generic(net, pg_net_id);
3705 struct proc_dir_entry *pe;
3706 int cpu, ret = 0;
3707
3708 pn->net = net;
3709 INIT_LIST_HEAD(&pn->pktgen_threads);
3710 pn->pktgen_exiting = false;
3711 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net);
3712 if (!pn->proc_dir) {
3713 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR);
3714 return -ENODEV;
3715 }
3716 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops);
3717 if (pe == NULL) {
3718 pr_err("cannot create %s procfs entry\n", PGCTRL);
3719 ret = -EINVAL;
3720 goto remove;
3721 }
3722
3723 for_each_online_cpu(cpu) {
3724 int err;
3725
3726 err = pktgen_create_thread(cpu, pn);
3727 if (err)
3728 pr_warn("Cannot create thread for cpu %d (%d)\n",
3729 cpu, err);
3730 }
3731
3732 if (list_empty(&pn->pktgen_threads)) {
3733 pr_err("Initialization failed for all threads\n");
3734 ret = -ENODEV;
3735 goto remove_entry;
3736 }
3737
3738 return 0;
3739
3740 remove_entry:
3741 remove_proc_entry(PGCTRL, pn->proc_dir);
3742 remove:
3743 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3744 return ret;
3745 }
3746
3747 static void __net_exit pg_net_exit(struct net *net)
3748 {
3749 struct pktgen_net *pn = net_generic(net, pg_net_id);
3750 struct pktgen_thread *t;
3751 struct list_head *q, *n;
3752 LIST_HEAD(list);
3753
3754 /* Stop all interfaces & threads */
3755 pn->pktgen_exiting = true;
3756
3757 mutex_lock(&pktgen_thread_lock);
3758 list_splice_init(&pn->pktgen_threads, &list);
3759 mutex_unlock(&pktgen_thread_lock);
3760
3761 list_for_each_safe(q, n, &list) {
3762 t = list_entry(q, struct pktgen_thread, th_list);
3763 list_del(&t->th_list);
3764 kthread_stop(t->tsk);
3765 kfree(t);
3766 }
3767
3768 remove_proc_entry(PGCTRL, pn->proc_dir);
3769 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3770 }
3771
3772 static struct pernet_operations pg_net_ops = {
3773 .init = pg_net_init,
3774 .exit = pg_net_exit,
3775 .id = &pg_net_id,
3776 .size = sizeof(struct pktgen_net),
3777 };
3778
3779 static int __init pg_init(void)
3780 {
3781 int ret = 0;
3782
3783 pr_info("%s", version);
3784 ret = register_pernet_subsys(&pg_net_ops);
3785 if (ret)
3786 return ret;
3787 ret = register_netdevice_notifier(&pktgen_notifier_block);
3788 if (ret)
3789 unregister_pernet_subsys(&pg_net_ops);
3790
3791 return ret;
3792 }
3793
3794 static void __exit pg_cleanup(void)
3795 {
3796 unregister_netdevice_notifier(&pktgen_notifier_block);
3797 unregister_pernet_subsys(&pg_net_ops);
3798 }
3799
3800 module_init(pg_init);
3801 module_exit(pg_cleanup);
3802
3803 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3804 MODULE_DESCRIPTION("Packet Generator tool");
3805 MODULE_LICENSE("GPL");
3806 MODULE_VERSION(VERSION);
3807 module_param(pg_count_d, int, 0);
3808 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3809 module_param(pg_delay_d, int, 0);
3810 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3811 module_param(pg_clone_skb_d, int, 0);
3812 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3813 module_param(debug, int, 0);
3814 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
Linux kernel - Deliverables
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