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Linux 4.1.16
[linux/fpc-iii.git] / net / core / pktgen.c
blob043ea1867d0f014c282a2c46529ed65c44e8ab31
1 /*
2 * Authors:
3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
4 * Uppsala University and
5 * Swedish University of Agricultural Sciences
6 *
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 * Ben Greear <greearb@candelatech.com>
9 * Jens Låås <jens.laas@data.slu.se>
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 *
16 *
17 * A tool for loading the network with preconfigurated packets.
18 * The tool is implemented as a linux module. Parameters are output
19 * device, delay (to hard_xmit), number of packets, and whether
20 * to use multiple SKBs or just the same one.
21 * pktgen uses the installed interface's output routine.
22 *
23 * Additional hacking by:
24 *
25 * Jens.Laas@data.slu.se
26 * Improved by ANK. 010120.
27 * Improved by ANK even more. 010212.
28 * MAC address typo fixed. 010417 --ro
29 * Integrated. 020301 --DaveM
30 * Added multiskb option 020301 --DaveM
31 * Scaling of results. 020417--sigurdur@linpro.no
32 * Significant re-work of the module:
33 * * Convert to threaded model to more efficiently be able to transmit
34 * and receive on multiple interfaces at once.
35 * * Converted many counters to __u64 to allow longer runs.
36 * * Allow configuration of ranges, like min/max IP address, MACs,
37 * and UDP-ports, for both source and destination, and can
38 * set to use a random distribution or sequentially walk the range.
39 * * Can now change most values after starting.
40 * * Place 12-byte packet in UDP payload with magic number,
41 * sequence number, and timestamp.
42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and
43 * latencies (with micro-second) precision.
44 * * Add IOCTL interface to easily get counters & configuration.
45 * --Ben Greear <greearb@candelatech.com>
46 *
47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
49 * as a "fastpath" with a configurable number of clones after alloc's.
50 * clone_skb=0 means all packets are allocated this also means ranges time
51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
52 * clones.
53 *
54 * Also moved to /proc/net/pktgen/
55 * --ro
56 *
57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
58 * mistakes. Also merged in DaveM's patch in the -pre6 patch.
59 * --Ben Greear <greearb@candelatech.com>
60 *
61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
62 *
63 *
64 * 021124 Finished major redesign and rewrite for new functionality.
65 * See Documentation/networking/pktgen.txt for how to use this.
66 *
67 * The new operation:
68 * For each CPU one thread/process is created at start. This process checks
69 * for running devices in the if_list and sends packets until count is 0 it
70 * also the thread checks the thread->control which is used for inter-process
71 * communication. controlling process "posts" operations to the threads this
72 * way.
73 * The if_list is RCU protected, and the if_lock remains to protect updating
74 * of if_list, from "add_device" as it invoked from userspace (via proc write).
75 *
76 * By design there should only be *one* "controlling" process. In practice
77 * multiple write accesses gives unpredictable result. Understood by "write"
78 * to /proc gives result code thats should be read be the "writer".
79 * For practical use this should be no problem.
80 *
81 * Note when adding devices to a specific CPU there good idea to also assign
82 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
83 * --ro
84 *
85 * Fix refcount off by one if first packet fails, potential null deref,
86 * memleak 030710- KJP
87 *
88 * First "ranges" functionality for ipv6 030726 --ro
89 *
90 * Included flow support. 030802 ANK.
91 *
92 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
93 *
94 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
95 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
96 *
97 * New xmit() return, do_div and misc clean up by Stephen Hemminger
98 * <shemminger@osdl.org> 040923
99 *
100 * Randy Dunlap fixed u64 printk compiler warning
101 *
102 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
103 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
104 *
105 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
106 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
107 *
108 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
109 * 050103
110 *
111 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
112 *
113 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
114 *
115 * Fixed src_mac command to set source mac of packet to value specified in
116 * command by Adit Ranadive <adit.262@gmail.com>
117 *
118 */
119
120 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
121
122 #include <linux/sys.h>
123 #include <linux/types.h>
124 #include <linux/module.h>
125 #include <linux/moduleparam.h>
126 #include <linux/kernel.h>
127 #include <linux/mutex.h>
128 #include <linux/sched.h>
129 #include <linux/slab.h>
130 #include <linux/vmalloc.h>
131 #include <linux/unistd.h>
132 #include <linux/string.h>
133 #include <linux/ptrace.h>
134 #include <linux/errno.h>
135 #include <linux/ioport.h>
136 #include <linux/interrupt.h>
137 #include <linux/capability.h>
138 #include <linux/hrtimer.h>
139 #include <linux/freezer.h>
140 #include <linux/delay.h>
141 #include <linux/timer.h>
142 #include <linux/list.h>
143 #include <linux/init.h>
144 #include <linux/skbuff.h>
145 #include <linux/netdevice.h>
146 #include <linux/inet.h>
147 #include <linux/inetdevice.h>
148 #include <linux/rtnetlink.h>
149 #include <linux/if_arp.h>
150 #include <linux/if_vlan.h>
151 #include <linux/in.h>
152 #include <linux/ip.h>
153 #include <linux/ipv6.h>
154 #include <linux/udp.h>
155 #include <linux/proc_fs.h>
156 #include <linux/seq_file.h>
157 #include <linux/wait.h>
158 #include <linux/etherdevice.h>
159 #include <linux/kthread.h>
160 #include <linux/prefetch.h>
161 #include <net/net_namespace.h>
162 #include <net/checksum.h>
163 #include <net/ipv6.h>
164 #include <net/udp.h>
165 #include <net/ip6_checksum.h>
166 #include <net/addrconf.h>
167 #ifdef CONFIG_XFRM
168 #include <net/xfrm.h>
169 #endif
170 #include <net/netns/generic.h>
171 #include <asm/byteorder.h>
172 #include <linux/rcupdate.h>
173 #include <linux/bitops.h>
174 #include <linux/io.h>
175 #include <linux/timex.h>
176 #include <linux/uaccess.h>
177 #include <asm/dma.h>
178 #include <asm/div64.h> /* do_div */
179
180 #define VERSION "2.74"
181 #define IP_NAME_SZ 32
182 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
183 #define MPLS_STACK_BOTTOM htonl(0x00000100)
184
185 #define func_enter() pr_debug("entering %s\n", __func__);
186
187 /* Device flag bits */
188 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
189 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
190 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
191 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
192 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
193 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
194 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
195 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
196 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
197 #define F_VID_RND (1<<9) /* Random VLAN ID */
198 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
199 #define F_FLOW_SEQ (1<<11) /* Sequential flows */
200 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */
201 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
202 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
203 #define F_NODE (1<<15) /* Node memory alloc*/
204 #define F_UDPCSUM (1<<16) /* Include UDP checksum */
205 #define F_NO_TIMESTAMP (1<<17) /* Don't timestamp packets (default TS) */
206
207 /* Thread control flag bits */
208 #define T_STOP (1<<0) /* Stop run */
209 #define T_RUN (1<<1) /* Start run */
210 #define T_REMDEVALL (1<<2) /* Remove all devs */
211 #define T_REMDEV (1<<3) /* Remove one dev */
212
213 /* If lock -- protects updating of if_list */
214 #define if_lock(t) spin_lock(&(t->if_lock));
215 #define if_unlock(t) spin_unlock(&(t->if_lock));
216
217 /* Used to help with determining the pkts on receive */
218 #define PKTGEN_MAGIC 0xbe9be955
219 #define PG_PROC_DIR "pktgen"
220 #define PGCTRL "pgctrl"
221
222 #define MAX_CFLOWS 65536
223
224 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
225 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
226
227 struct flow_state {
228 __be32 cur_daddr;
229 int count;
230 #ifdef CONFIG_XFRM
231 struct xfrm_state *x;
232 #endif
233 __u32 flags;
234 };
235
236 /* flow flag bits */
237 #define F_INIT (1<<0) /* flow has been initialized */
238
239 struct pktgen_dev {
240 /*
241 * Try to keep frequent/infrequent used vars. separated.
242 */
243 struct proc_dir_entry *entry; /* proc file */
244 struct pktgen_thread *pg_thread;/* the owner */
245 struct list_head list; /* chaining in the thread's run-queue */
246 struct rcu_head rcu; /* freed by RCU */
247
248 int running; /* if false, the test will stop */
249
250 /* If min != max, then we will either do a linear iteration, or
251 * we will do a random selection from within the range.
252 */
253 __u32 flags;
254 int removal_mark; /* non-zero => the device is marked for
255 * removal by worker thread */
256
257 int min_pkt_size;
258 int max_pkt_size;
259 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
260 int nfrags;
261 struct page *page;
262 u64 delay; /* nano-seconds */
263
264 __u64 count; /* Default No packets to send */
265 __u64 sofar; /* How many pkts we've sent so far */
266 __u64 tx_bytes; /* How many bytes we've transmitted */
267 __u64 errors; /* Errors when trying to transmit, */
268
269 /* runtime counters relating to clone_skb */
270
271 __u64 allocated_skbs;
272 __u32 clone_count;
273 int last_ok; /* Was last skb sent?
274 * Or a failed transmit of some sort?
275 * This will keep sequence numbers in order
276 */
277 ktime_t next_tx;
278 ktime_t started_at;
279 ktime_t stopped_at;
280 u64 idle_acc; /* nano-seconds */
281
282 __u32 seq_num;
283
284 int clone_skb; /*
285 * Use multiple SKBs during packet gen.
286 * If this number is greater than 1, then
287 * that many copies of the same packet will be
288 * sent before a new packet is allocated.
289 * If you want to send 1024 identical packets
290 * before creating a new packet,
291 * set clone_skb to 1024.
292 */
293
294 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
295 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
296 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
297 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
298
299 struct in6_addr in6_saddr;
300 struct in6_addr in6_daddr;
301 struct in6_addr cur_in6_daddr;
302 struct in6_addr cur_in6_saddr;
303 /* For ranges */
304 struct in6_addr min_in6_daddr;
305 struct in6_addr max_in6_daddr;
306 struct in6_addr min_in6_saddr;
307 struct in6_addr max_in6_saddr;
308
309 /* If we're doing ranges, random or incremental, then this
310 * defines the min/max for those ranges.
311 */
312 __be32 saddr_min; /* inclusive, source IP address */
313 __be32 saddr_max; /* exclusive, source IP address */
314 __be32 daddr_min; /* inclusive, dest IP address */
315 __be32 daddr_max; /* exclusive, dest IP address */
316
317 __u16 udp_src_min; /* inclusive, source UDP port */
318 __u16 udp_src_max; /* exclusive, source UDP port */
319 __u16 udp_dst_min; /* inclusive, dest UDP port */
320 __u16 udp_dst_max; /* exclusive, dest UDP port */
321
322 /* DSCP + ECN */
323 __u8 tos; /* six MSB of (former) IPv4 TOS
324 are for dscp codepoint */
325 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
326 (see RFC 3260, sec. 4) */
327
328 /* MPLS */
329 unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */
330 __be32 labels[MAX_MPLS_LABELS];
331
332 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
333 __u8 vlan_p;
334 __u8 vlan_cfi;
335 __u16 vlan_id; /* 0xffff means no vlan tag */
336
337 __u8 svlan_p;
338 __u8 svlan_cfi;
339 __u16 svlan_id; /* 0xffff means no svlan tag */
340
341 __u32 src_mac_count; /* How many MACs to iterate through */
342 __u32 dst_mac_count; /* How many MACs to iterate through */
343
344 unsigned char dst_mac[ETH_ALEN];
345 unsigned char src_mac[ETH_ALEN];
346
347 __u32 cur_dst_mac_offset;
348 __u32 cur_src_mac_offset;
349 __be32 cur_saddr;
350 __be32 cur_daddr;
351 __u16 ip_id;
352 __u16 cur_udp_dst;
353 __u16 cur_udp_src;
354 __u16 cur_queue_map;
355 __u32 cur_pkt_size;
356 __u32 last_pkt_size;
357
358 __u8 hh[14];
359 /* = {
360 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
361
362 We fill in SRC address later
363 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
364 0x08, 0x00
365 };
366 */
367 __u16 pad; /* pad out the hh struct to an even 16 bytes */
368
369 struct sk_buff *skb; /* skb we are to transmit next, used for when we
370 * are transmitting the same one multiple times
371 */
372 struct net_device *odev; /* The out-going device.
373 * Note that the device should have it's
374 * pg_info pointer pointing back to this
375 * device.
376 * Set when the user specifies the out-going
377 * device name (not when the inject is
378 * started as it used to do.)
379 */
380 char odevname[32];
381 struct flow_state *flows;
382 unsigned int cflows; /* Concurrent flows (config) */
383 unsigned int lflow; /* Flow length (config) */
384 unsigned int nflows; /* accumulated flows (stats) */
385 unsigned int curfl; /* current sequenced flow (state)*/
386
387 u16 queue_map_min;
388 u16 queue_map_max;
389 __u32 skb_priority; /* skb priority field */
390 unsigned int burst; /* number of duplicated packets to burst */
391 int node; /* Memory node */
392
393 #ifdef CONFIG_XFRM
394 __u8 ipsmode; /* IPSEC mode (config) */
395 __u8 ipsproto; /* IPSEC type (config) */
396 __u32 spi;
397 struct dst_entry dst;
398 struct dst_ops dstops;
399 #endif
400 char result[512];
401 };
402
403 struct pktgen_hdr {
404 __be32 pgh_magic;
405 __be32 seq_num;
406 __be32 tv_sec;
407 __be32 tv_usec;
408 };
409
410
411 static int pg_net_id __read_mostly;
412
413 struct pktgen_net {
414 struct net *net;
415 struct proc_dir_entry *proc_dir;
416 struct list_head pktgen_threads;
417 bool pktgen_exiting;
418 };
419
420 struct pktgen_thread {
421 spinlock_t if_lock; /* for list of devices */
422 struct list_head if_list; /* All device here */
423 struct list_head th_list;
424 struct task_struct *tsk;
425 char result[512];
426
427 /* Field for thread to receive "posted" events terminate,
428 stop ifs etc. */
429
430 u32 control;
431 int cpu;
432
433 wait_queue_head_t queue;
434 struct completion start_done;
435 struct pktgen_net *net;
436 };
437
438 #define REMOVE 1
439 #define FIND 0
440
441 static const char version[] =
442 "Packet Generator for packet performance testing. "
443 "Version: " VERSION "\n";
444
445 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
446 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
447 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
448 const char *ifname, bool exact);
449 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
450 static void pktgen_run_all_threads(struct pktgen_net *pn);
451 static void pktgen_reset_all_threads(struct pktgen_net *pn);
452 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn);
453
454 static void pktgen_stop(struct pktgen_thread *t);
455 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
456
457 /* Module parameters, defaults. */
458 static int pg_count_d __read_mostly = 1000;
459 static int pg_delay_d __read_mostly;
460 static int pg_clone_skb_d __read_mostly;
461 static int debug __read_mostly;
462
463 static DEFINE_MUTEX(pktgen_thread_lock);
464
465 static struct notifier_block pktgen_notifier_block = {
466 .notifier_call = pktgen_device_event,
467 };
468
469 /*
470 * /proc handling functions
471 *
472 */
473
474 static int pgctrl_show(struct seq_file *seq, void *v)
475 {
476 seq_puts(seq, version);
477 return 0;
478 }
479
480 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
481 size_t count, loff_t *ppos)
482 {
483 char data[128];
484 struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
485
486 if (!capable(CAP_NET_ADMIN))
487 return -EPERM;
488
489 if (count == 0)
490 return -EINVAL;
491
492 if (count > sizeof(data))
493 count = sizeof(data);
494
495 if (copy_from_user(data, buf, count))
496 return -EFAULT;
497
498 data[count - 1] = 0; /* Strip trailing '\n' and terminate string */
499
500 if (!strcmp(data, "stop"))
501 pktgen_stop_all_threads_ifs(pn);
502
503 else if (!strcmp(data, "start"))
504 pktgen_run_all_threads(pn);
505
506 else if (!strcmp(data, "reset"))
507 pktgen_reset_all_threads(pn);
508
509 else
510 pr_warn("Unknown command: %s\n", data);
511
512 return count;
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_puts(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_puts(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->burst > 1)
618 seq_printf(seq, " burst: %d\n", pkt_dev->burst);
619
620 if (pkt_dev->node >= 0)
621 seq_printf(seq, " node: %d\n", pkt_dev->node);
622
623 seq_puts(seq, " Flags: ");
624
625 if (pkt_dev->flags & F_IPV6)
626 seq_puts(seq, "IPV6 ");
627
628 if (pkt_dev->flags & F_IPSRC_RND)
629 seq_puts(seq, "IPSRC_RND ");
630
631 if (pkt_dev->flags & F_IPDST_RND)
632 seq_puts(seq, "IPDST_RND ");
633
634 if (pkt_dev->flags & F_TXSIZE_RND)
635 seq_puts(seq, "TXSIZE_RND ");
636
637 if (pkt_dev->flags & F_UDPSRC_RND)
638 seq_puts(seq, "UDPSRC_RND ");
639
640 if (pkt_dev->flags & F_UDPDST_RND)
641 seq_puts(seq, "UDPDST_RND ");
642
643 if (pkt_dev->flags & F_UDPCSUM)
644 seq_puts(seq, "UDPCSUM ");
645
646 if (pkt_dev->flags & F_NO_TIMESTAMP)
647 seq_puts(seq, "NO_TIMESTAMP ");
648
649 if (pkt_dev->flags & F_MPLS_RND)
650 seq_puts(seq, "MPLS_RND ");
651
652 if (pkt_dev->flags & F_QUEUE_MAP_RND)
653 seq_puts(seq, "QUEUE_MAP_RND ");
654
655 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
656 seq_puts(seq, "QUEUE_MAP_CPU ");
657
658 if (pkt_dev->cflows) {
659 if (pkt_dev->flags & F_FLOW_SEQ)
660 seq_puts(seq, "FLOW_SEQ "); /*in sequence flows*/
661 else
662 seq_puts(seq, "FLOW_RND ");
663 }
664
665 #ifdef CONFIG_XFRM
666 if (pkt_dev->flags & F_IPSEC_ON) {
667 seq_puts(seq, "IPSEC ");
668 if (pkt_dev->spi)
669 seq_printf(seq, "spi:%u", pkt_dev->spi);
670 }
671 #endif
672
673 if (pkt_dev->flags & F_MACSRC_RND)
674 seq_puts(seq, "MACSRC_RND ");
675
676 if (pkt_dev->flags & F_MACDST_RND)
677 seq_puts(seq, "MACDST_RND ");
678
679 if (pkt_dev->flags & F_VID_RND)
680 seq_puts(seq, "VID_RND ");
681
682 if (pkt_dev->flags & F_SVID_RND)
683 seq_puts(seq, "SVID_RND ");
684
685 if (pkt_dev->flags & F_NODE)
686 seq_puts(seq, "NODE_ALLOC ");
687
688 seq_puts(seq, "\n");
689
690 /* not really stopped, more like last-running-at */
691 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at;
692 idle = pkt_dev->idle_acc;
693 do_div(idle, NSEC_PER_USEC);
694
695 seq_printf(seq,
696 "Current:\n pkts-sofar: %llu errors: %llu\n",
697 (unsigned long long)pkt_dev->sofar,
698 (unsigned long long)pkt_dev->errors);
699
700 seq_printf(seq,
701 " started: %lluus stopped: %lluus idle: %lluus\n",
702 (unsigned long long) ktime_to_us(pkt_dev->started_at),
703 (unsigned long long) ktime_to_us(stopped),
704 (unsigned long long) idle);
705
706 seq_printf(seq,
707 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
708 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
709 pkt_dev->cur_src_mac_offset);
710
711 if (pkt_dev->flags & F_IPV6) {
712 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
713 &pkt_dev->cur_in6_saddr,
714 &pkt_dev->cur_in6_daddr);
715 } else
716 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n",
717 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
718
719 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
720 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
721
722 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
723
724 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
725
726 if (pkt_dev->result[0])
727 seq_printf(seq, "Result: %s\n", pkt_dev->result);
728 else
729 seq_puts(seq, "Result: Idle\n");
730
731 return 0;
732 }
733
734
735 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
736 __u32 *num)
737 {
738 int i = 0;
739 *num = 0;
740
741 for (; i < maxlen; i++) {
742 int value;
743 char c;
744 *num <<= 4;
745 if (get_user(c, &user_buffer[i]))
746 return -EFAULT;
747 value = hex_to_bin(c);
748 if (value >= 0)
749 *num |= value;
750 else
751 break;
752 }
753 return i;
754 }
755
756 static int count_trail_chars(const char __user * user_buffer,
757 unsigned int maxlen)
758 {
759 int i;
760
761 for (i = 0; i < maxlen; i++) {
762 char c;
763 if (get_user(c, &user_buffer[i]))
764 return -EFAULT;
765 switch (c) {
766 case '\"':
767 case '\n':
768 case '\r':
769 case '\t':
770 case ' ':
771 case '=':
772 break;
773 default:
774 goto done;
775 }
776 }
777 done:
778 return i;
779 }
780
781 static long num_arg(const char __user *user_buffer, unsigned long maxlen,
782 unsigned long *num)
783 {
784 int i;
785 *num = 0;
786
787 for (i = 0; i < maxlen; i++) {
788 char c;
789 if (get_user(c, &user_buffer[i]))
790 return -EFAULT;
791 if ((c >= '0') && (c <= '9')) {
792 *num *= 10;
793 *num += c - '0';
794 } else
795 break;
796 }
797 return i;
798 }
799
800 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
801 {
802 int i;
803
804 for (i = 0; i < maxlen; i++) {
805 char c;
806 if (get_user(c, &user_buffer[i]))
807 return -EFAULT;
808 switch (c) {
809 case '\"':
810 case '\n':
811 case '\r':
812 case '\t':
813 case ' ':
814 goto done_str;
815 default:
816 break;
817 }
818 }
819 done_str:
820 return i;
821 }
822
823 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
824 {
825 unsigned int n = 0;
826 char c;
827 ssize_t i = 0;
828 int len;
829
830 pkt_dev->nr_labels = 0;
831 do {
832 __u32 tmp;
833 len = hex32_arg(&buffer[i], 8, &tmp);
834 if (len <= 0)
835 return len;
836 pkt_dev->labels[n] = htonl(tmp);
837 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
838 pkt_dev->flags |= F_MPLS_RND;
839 i += len;
840 if (get_user(c, &buffer[i]))
841 return -EFAULT;
842 i++;
843 n++;
844 if (n >= MAX_MPLS_LABELS)
845 return -E2BIG;
846 } while (c == ',');
847
848 pkt_dev->nr_labels = n;
849 return i;
850 }
851
852 static ssize_t pktgen_if_write(struct file *file,
853 const char __user * user_buffer, size_t count,
854 loff_t * offset)
855 {
856 struct seq_file *seq = file->private_data;
857 struct pktgen_dev *pkt_dev = seq->private;
858 int i, max, len;
859 char name[16], valstr[32];
860 unsigned long value = 0;
861 char *pg_result = NULL;
862 int tmp = 0;
863 char buf[128];
864
865 pg_result = &(pkt_dev->result[0]);
866
867 if (count < 1) {
868 pr_warn("wrong command format\n");
869 return -EINVAL;
870 }
871
872 max = count;
873 tmp = count_trail_chars(user_buffer, max);
874 if (tmp < 0) {
875 pr_warn("illegal format\n");
876 return tmp;
877 }
878 i = tmp;
879
880 /* Read variable name */
881
882 len = strn_len(&user_buffer[i], sizeof(name) - 1);
883 if (len < 0)
884 return len;
885
886 memset(name, 0, sizeof(name));
887 if (copy_from_user(name, &user_buffer[i], len))
888 return -EFAULT;
889 i += len;
890
891 max = count - i;
892 len = count_trail_chars(&user_buffer[i], max);
893 if (len < 0)
894 return len;
895
896 i += len;
897
898 if (debug) {
899 size_t copy = min_t(size_t, count, 1023);
900 char tb[copy + 1];
901 if (copy_from_user(tb, user_buffer, copy))
902 return -EFAULT;
903 tb[copy] = 0;
904 pr_debug("%s,%lu buffer -:%s:-\n",
905 name, (unsigned long)count, tb);
906 }
907
908 if (!strcmp(name, "min_pkt_size")) {
909 len = num_arg(&user_buffer[i], 10, &value);
910 if (len < 0)
911 return len;
912
913 i += len;
914 if (value < 14 + 20 + 8)
915 value = 14 + 20 + 8;
916 if (value != pkt_dev->min_pkt_size) {
917 pkt_dev->min_pkt_size = value;
918 pkt_dev->cur_pkt_size = value;
919 }
920 sprintf(pg_result, "OK: min_pkt_size=%u",
921 pkt_dev->min_pkt_size);
922 return count;
923 }
924
925 if (!strcmp(name, "max_pkt_size")) {
926 len = num_arg(&user_buffer[i], 10, &value);
927 if (len < 0)
928 return len;
929
930 i += len;
931 if (value < 14 + 20 + 8)
932 value = 14 + 20 + 8;
933 if (value != pkt_dev->max_pkt_size) {
934 pkt_dev->max_pkt_size = value;
935 pkt_dev->cur_pkt_size = value;
936 }
937 sprintf(pg_result, "OK: max_pkt_size=%u",
938 pkt_dev->max_pkt_size);
939 return count;
940 }
941
942 /* Shortcut for min = max */
943
944 if (!strcmp(name, "pkt_size")) {
945 len = num_arg(&user_buffer[i], 10, &value);
946 if (len < 0)
947 return len;
948
949 i += len;
950 if (value < 14 + 20 + 8)
951 value = 14 + 20 + 8;
952 if (value != pkt_dev->min_pkt_size) {
953 pkt_dev->min_pkt_size = value;
954 pkt_dev->max_pkt_size = value;
955 pkt_dev->cur_pkt_size = value;
956 }
957 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
958 return count;
959 }
960
961 if (!strcmp(name, "debug")) {
962 len = num_arg(&user_buffer[i], 10, &value);
963 if (len < 0)
964 return len;
965
966 i += len;
967 debug = value;
968 sprintf(pg_result, "OK: debug=%u", debug);
969 return count;
970 }
971
972 if (!strcmp(name, "frags")) {
973 len = num_arg(&user_buffer[i], 10, &value);
974 if (len < 0)
975 return len;
976
977 i += len;
978 pkt_dev->nfrags = value;
979 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
980 return count;
981 }
982 if (!strcmp(name, "delay")) {
983 len = num_arg(&user_buffer[i], 10, &value);
984 if (len < 0)
985 return len;
986
987 i += len;
988 if (value == 0x7FFFFFFF)
989 pkt_dev->delay = ULLONG_MAX;
990 else
991 pkt_dev->delay = (u64)value;
992
993 sprintf(pg_result, "OK: delay=%llu",
994 (unsigned long long) pkt_dev->delay);
995 return count;
996 }
997 if (!strcmp(name, "rate")) {
998 len = num_arg(&user_buffer[i], 10, &value);
999 if (len < 0)
1000 return len;
1001
1002 i += len;
1003 if (!value)
1004 return len;
1005 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
1006 if (debug)
1007 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1008
1009 sprintf(pg_result, "OK: rate=%lu", value);
1010 return count;
1011 }
1012 if (!strcmp(name, "ratep")) {
1013 len = num_arg(&user_buffer[i], 10, &value);
1014 if (len < 0)
1015 return len;
1016
1017 i += len;
1018 if (!value)
1019 return len;
1020 pkt_dev->delay = NSEC_PER_SEC/value;
1021 if (debug)
1022 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1023
1024 sprintf(pg_result, "OK: rate=%lu", value);
1025 return count;
1026 }
1027 if (!strcmp(name, "udp_src_min")) {
1028 len = num_arg(&user_buffer[i], 10, &value);
1029 if (len < 0)
1030 return len;
1031
1032 i += len;
1033 if (value != pkt_dev->udp_src_min) {
1034 pkt_dev->udp_src_min = value;
1035 pkt_dev->cur_udp_src = value;
1036 }
1037 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1038 return count;
1039 }
1040 if (!strcmp(name, "udp_dst_min")) {
1041 len = num_arg(&user_buffer[i], 10, &value);
1042 if (len < 0)
1043 return len;
1044
1045 i += len;
1046 if (value != pkt_dev->udp_dst_min) {
1047 pkt_dev->udp_dst_min = value;
1048 pkt_dev->cur_udp_dst = value;
1049 }
1050 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1051 return count;
1052 }
1053 if (!strcmp(name, "udp_src_max")) {
1054 len = num_arg(&user_buffer[i], 10, &value);
1055 if (len < 0)
1056 return len;
1057
1058 i += len;
1059 if (value != pkt_dev->udp_src_max) {
1060 pkt_dev->udp_src_max = value;
1061 pkt_dev->cur_udp_src = value;
1062 }
1063 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1064 return count;
1065 }
1066 if (!strcmp(name, "udp_dst_max")) {
1067 len = num_arg(&user_buffer[i], 10, &value);
1068 if (len < 0)
1069 return len;
1070
1071 i += len;
1072 if (value != pkt_dev->udp_dst_max) {
1073 pkt_dev->udp_dst_max = value;
1074 pkt_dev->cur_udp_dst = value;
1075 }
1076 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1077 return count;
1078 }
1079 if (!strcmp(name, "clone_skb")) {
1080 len = num_arg(&user_buffer[i], 10, &value);
1081 if (len < 0)
1082 return len;
1083 if ((value > 0) &&
1084 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1085 return -ENOTSUPP;
1086 i += len;
1087 pkt_dev->clone_skb = value;
1088
1089 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1090 return count;
1091 }
1092 if (!strcmp(name, "count")) {
1093 len = num_arg(&user_buffer[i], 10, &value);
1094 if (len < 0)
1095 return len;
1096
1097 i += len;
1098 pkt_dev->count = value;
1099 sprintf(pg_result, "OK: count=%llu",
1100 (unsigned long long)pkt_dev->count);
1101 return count;
1102 }
1103 if (!strcmp(name, "src_mac_count")) {
1104 len = num_arg(&user_buffer[i], 10, &value);
1105 if (len < 0)
1106 return len;
1107
1108 i += len;
1109 if (pkt_dev->src_mac_count != value) {
1110 pkt_dev->src_mac_count = value;
1111 pkt_dev->cur_src_mac_offset = 0;
1112 }
1113 sprintf(pg_result, "OK: src_mac_count=%d",
1114 pkt_dev->src_mac_count);
1115 return count;
1116 }
1117 if (!strcmp(name, "dst_mac_count")) {
1118 len = num_arg(&user_buffer[i], 10, &value);
1119 if (len < 0)
1120 return len;
1121
1122 i += len;
1123 if (pkt_dev->dst_mac_count != value) {
1124 pkt_dev->dst_mac_count = value;
1125 pkt_dev->cur_dst_mac_offset = 0;
1126 }
1127 sprintf(pg_result, "OK: dst_mac_count=%d",
1128 pkt_dev->dst_mac_count);
1129 return count;
1130 }
1131 if (!strcmp(name, "burst")) {
1132 len = num_arg(&user_buffer[i], 10, &value);
1133 if (len < 0)
1134 return len;
1135
1136 i += len;
1137 if ((value > 1) &&
1138 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1139 return -ENOTSUPP;
1140 pkt_dev->burst = value < 1 ? 1 : value;
1141 sprintf(pg_result, "OK: burst=%d", pkt_dev->burst);
1142 return count;
1143 }
1144 if (!strcmp(name, "node")) {
1145 len = num_arg(&user_buffer[i], 10, &value);
1146 if (len < 0)
1147 return len;
1148
1149 i += len;
1150
1151 if (node_possible(value)) {
1152 pkt_dev->node = value;
1153 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1154 if (pkt_dev->page) {
1155 put_page(pkt_dev->page);
1156 pkt_dev->page = NULL;
1157 }
1158 }
1159 else
1160 sprintf(pg_result, "ERROR: node not possible");
1161 return count;
1162 }
1163 if (!strcmp(name, "flag")) {
1164 char f[32];
1165 memset(f, 0, 32);
1166 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1167 if (len < 0)
1168 return len;
1169
1170 if (copy_from_user(f, &user_buffer[i], len))
1171 return -EFAULT;
1172 i += len;
1173 if (strcmp(f, "IPSRC_RND") == 0)
1174 pkt_dev->flags |= F_IPSRC_RND;
1175
1176 else if (strcmp(f, "!IPSRC_RND") == 0)
1177 pkt_dev->flags &= ~F_IPSRC_RND;
1178
1179 else if (strcmp(f, "TXSIZE_RND") == 0)
1180 pkt_dev->flags |= F_TXSIZE_RND;
1181
1182 else if (strcmp(f, "!TXSIZE_RND") == 0)
1183 pkt_dev->flags &= ~F_TXSIZE_RND;
1184
1185 else if (strcmp(f, "IPDST_RND") == 0)
1186 pkt_dev->flags |= F_IPDST_RND;
1187
1188 else if (strcmp(f, "!IPDST_RND") == 0)
1189 pkt_dev->flags &= ~F_IPDST_RND;
1190
1191 else if (strcmp(f, "UDPSRC_RND") == 0)
1192 pkt_dev->flags |= F_UDPSRC_RND;
1193
1194 else if (strcmp(f, "!UDPSRC_RND") == 0)
1195 pkt_dev->flags &= ~F_UDPSRC_RND;
1196
1197 else if (strcmp(f, "UDPDST_RND") == 0)
1198 pkt_dev->flags |= F_UDPDST_RND;
1199
1200 else if (strcmp(f, "!UDPDST_RND") == 0)
1201 pkt_dev->flags &= ~F_UDPDST_RND;
1202
1203 else if (strcmp(f, "MACSRC_RND") == 0)
1204 pkt_dev->flags |= F_MACSRC_RND;
1205
1206 else if (strcmp(f, "!MACSRC_RND") == 0)
1207 pkt_dev->flags &= ~F_MACSRC_RND;
1208
1209 else if (strcmp(f, "MACDST_RND") == 0)
1210 pkt_dev->flags |= F_MACDST_RND;
1211
1212 else if (strcmp(f, "!MACDST_RND") == 0)
1213 pkt_dev->flags &= ~F_MACDST_RND;
1214
1215 else if (strcmp(f, "MPLS_RND") == 0)
1216 pkt_dev->flags |= F_MPLS_RND;
1217
1218 else if (strcmp(f, "!MPLS_RND") == 0)
1219 pkt_dev->flags &= ~F_MPLS_RND;
1220
1221 else if (strcmp(f, "VID_RND") == 0)
1222 pkt_dev->flags |= F_VID_RND;
1223
1224 else if (strcmp(f, "!VID_RND") == 0)
1225 pkt_dev->flags &= ~F_VID_RND;
1226
1227 else if (strcmp(f, "SVID_RND") == 0)
1228 pkt_dev->flags |= F_SVID_RND;
1229
1230 else if (strcmp(f, "!SVID_RND") == 0)
1231 pkt_dev->flags &= ~F_SVID_RND;
1232
1233 else if (strcmp(f, "FLOW_SEQ") == 0)
1234 pkt_dev->flags |= F_FLOW_SEQ;
1235
1236 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1237 pkt_dev->flags |= F_QUEUE_MAP_RND;
1238
1239 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1240 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1241
1242 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1243 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1244
1245 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1246 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1247 #ifdef CONFIG_XFRM
1248 else if (strcmp(f, "IPSEC") == 0)
1249 pkt_dev->flags |= F_IPSEC_ON;
1250 #endif
1251
1252 else if (strcmp(f, "!IPV6") == 0)
1253 pkt_dev->flags &= ~F_IPV6;
1254
1255 else if (strcmp(f, "NODE_ALLOC") == 0)
1256 pkt_dev->flags |= F_NODE;
1257
1258 else if (strcmp(f, "!NODE_ALLOC") == 0)
1259 pkt_dev->flags &= ~F_NODE;
1260
1261 else if (strcmp(f, "UDPCSUM") == 0)
1262 pkt_dev->flags |= F_UDPCSUM;
1263
1264 else if (strcmp(f, "!UDPCSUM") == 0)
1265 pkt_dev->flags &= ~F_UDPCSUM;
1266
1267 else if (strcmp(f, "NO_TIMESTAMP") == 0)
1268 pkt_dev->flags |= F_NO_TIMESTAMP;
1269
1270 else {
1271 sprintf(pg_result,
1272 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1273 f,
1274 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1275 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, "
1276 "MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, "
1277 "QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, "
1278 "NO_TIMESTAMP, "
1279 #ifdef CONFIG_XFRM
1280 "IPSEC, "
1281 #endif
1282 "NODE_ALLOC\n");
1283 return count;
1284 }
1285 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1286 return count;
1287 }
1288 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1289 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1290 if (len < 0)
1291 return len;
1292
1293 if (copy_from_user(buf, &user_buffer[i], len))
1294 return -EFAULT;
1295 buf[len] = 0;
1296 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1297 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1298 strncpy(pkt_dev->dst_min, buf, len);
1299 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1300 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1301 }
1302 if (debug)
1303 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
1304 i += len;
1305 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1306 return count;
1307 }
1308 if (!strcmp(name, "dst_max")) {
1309 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1310 if (len < 0)
1311 return len;
1312
1313
1314 if (copy_from_user(buf, &user_buffer[i], len))
1315 return -EFAULT;
1316
1317 buf[len] = 0;
1318 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1319 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1320 strncpy(pkt_dev->dst_max, buf, len);
1321 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1322 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1323 }
1324 if (debug)
1325 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
1326 i += len;
1327 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1328 return count;
1329 }
1330 if (!strcmp(name, "dst6")) {
1331 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1332 if (len < 0)
1333 return len;
1334
1335 pkt_dev->flags |= F_IPV6;
1336
1337 if (copy_from_user(buf, &user_buffer[i], len))
1338 return -EFAULT;
1339 buf[len] = 0;
1340
1341 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
1342 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1343
1344 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1345
1346 if (debug)
1347 pr_debug("dst6 set to: %s\n", buf);
1348
1349 i += len;
1350 sprintf(pg_result, "OK: dst6=%s", buf);
1351 return count;
1352 }
1353 if (!strcmp(name, "dst6_min")) {
1354 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1355 if (len < 0)
1356 return len;
1357
1358 pkt_dev->flags |= F_IPV6;
1359
1360 if (copy_from_user(buf, &user_buffer[i], len))
1361 return -EFAULT;
1362 buf[len] = 0;
1363
1364 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
1365 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1366
1367 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
1368 if (debug)
1369 pr_debug("dst6_min set to: %s\n", buf);
1370
1371 i += len;
1372 sprintf(pg_result, "OK: dst6_min=%s", buf);
1373 return count;
1374 }
1375 if (!strcmp(name, "dst6_max")) {
1376 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1377 if (len < 0)
1378 return len;
1379
1380 pkt_dev->flags |= F_IPV6;
1381
1382 if (copy_from_user(buf, &user_buffer[i], len))
1383 return -EFAULT;
1384 buf[len] = 0;
1385
1386 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
1387 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1388
1389 if (debug)
1390 pr_debug("dst6_max set to: %s\n", buf);
1391
1392 i += len;
1393 sprintf(pg_result, "OK: dst6_max=%s", buf);
1394 return count;
1395 }
1396 if (!strcmp(name, "src6")) {
1397 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1398 if (len < 0)
1399 return len;
1400
1401 pkt_dev->flags |= F_IPV6;
1402
1403 if (copy_from_user(buf, &user_buffer[i], len))
1404 return -EFAULT;
1405 buf[len] = 0;
1406
1407 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
1408 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1409
1410 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1411
1412 if (debug)
1413 pr_debug("src6 set to: %s\n", buf);
1414
1415 i += len;
1416 sprintf(pg_result, "OK: src6=%s", buf);
1417 return count;
1418 }
1419 if (!strcmp(name, "src_min")) {
1420 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1421 if (len < 0)
1422 return len;
1423
1424 if (copy_from_user(buf, &user_buffer[i], len))
1425 return -EFAULT;
1426 buf[len] = 0;
1427 if (strcmp(buf, pkt_dev->src_min) != 0) {
1428 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1429 strncpy(pkt_dev->src_min, buf, len);
1430 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1431 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1432 }
1433 if (debug)
1434 pr_debug("src_min set to: %s\n", pkt_dev->src_min);
1435 i += len;
1436 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1437 return count;
1438 }
1439 if (!strcmp(name, "src_max")) {
1440 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1441 if (len < 0)
1442 return len;
1443
1444 if (copy_from_user(buf, &user_buffer[i], len))
1445 return -EFAULT;
1446 buf[len] = 0;
1447 if (strcmp(buf, pkt_dev->src_max) != 0) {
1448 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1449 strncpy(pkt_dev->src_max, buf, len);
1450 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1451 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1452 }
1453 if (debug)
1454 pr_debug("src_max set to: %s\n", pkt_dev->src_max);
1455 i += len;
1456 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1457 return count;
1458 }
1459 if (!strcmp(name, "dst_mac")) {
1460 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1461 if (len < 0)
1462 return len;
1463
1464 memset(valstr, 0, sizeof(valstr));
1465 if (copy_from_user(valstr, &user_buffer[i], len))
1466 return -EFAULT;
1467
1468 if (!mac_pton(valstr, pkt_dev->dst_mac))
1469 return -EINVAL;
1470 /* Set up Dest MAC */
1471 ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac);
1472
1473 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1474 return count;
1475 }
1476 if (!strcmp(name, "src_mac")) {
1477 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1478 if (len < 0)
1479 return len;
1480
1481 memset(valstr, 0, sizeof(valstr));
1482 if (copy_from_user(valstr, &user_buffer[i], len))
1483 return -EFAULT;
1484
1485 if (!mac_pton(valstr, pkt_dev->src_mac))
1486 return -EINVAL;
1487 /* Set up Src MAC */
1488 ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac);
1489
1490 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1491 return count;
1492 }
1493
1494 if (!strcmp(name, "clear_counters")) {
1495 pktgen_clear_counters(pkt_dev);
1496 sprintf(pg_result, "OK: Clearing counters.\n");
1497 return count;
1498 }
1499
1500 if (!strcmp(name, "flows")) {
1501 len = num_arg(&user_buffer[i], 10, &value);
1502 if (len < 0)
1503 return len;
1504
1505 i += len;
1506 if (value > MAX_CFLOWS)
1507 value = MAX_CFLOWS;
1508
1509 pkt_dev->cflows = value;
1510 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1511 return count;
1512 }
1513 #ifdef CONFIG_XFRM
1514 if (!strcmp(name, "spi")) {
1515 len = num_arg(&user_buffer[i], 10, &value);
1516 if (len < 0)
1517 return len;
1518
1519 i += len;
1520 pkt_dev->spi = value;
1521 sprintf(pg_result, "OK: spi=%u", pkt_dev->spi);
1522 return count;
1523 }
1524 #endif
1525 if (!strcmp(name, "flowlen")) {
1526 len = num_arg(&user_buffer[i], 10, &value);
1527 if (len < 0)
1528 return len;
1529
1530 i += len;
1531 pkt_dev->lflow = value;
1532 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1533 return count;
1534 }
1535
1536 if (!strcmp(name, "queue_map_min")) {
1537 len = num_arg(&user_buffer[i], 5, &value);
1538 if (len < 0)
1539 return len;
1540
1541 i += len;
1542 pkt_dev->queue_map_min = value;
1543 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1544 return count;
1545 }
1546
1547 if (!strcmp(name, "queue_map_max")) {
1548 len = num_arg(&user_buffer[i], 5, &value);
1549 if (len < 0)
1550 return len;
1551
1552 i += len;
1553 pkt_dev->queue_map_max = value;
1554 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1555 return count;
1556 }
1557
1558 if (!strcmp(name, "mpls")) {
1559 unsigned int n, cnt;
1560
1561 len = get_labels(&user_buffer[i], pkt_dev);
1562 if (len < 0)
1563 return len;
1564 i += len;
1565 cnt = sprintf(pg_result, "OK: mpls=");
1566 for (n = 0; n < pkt_dev->nr_labels; n++)
1567 cnt += sprintf(pg_result + cnt,
1568 "%08x%s", ntohl(pkt_dev->labels[n]),
1569 n == pkt_dev->nr_labels-1 ? "" : ",");
1570
1571 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1572 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1573 pkt_dev->svlan_id = 0xffff;
1574
1575 if (debug)
1576 pr_debug("VLAN/SVLAN auto turned off\n");
1577 }
1578 return count;
1579 }
1580
1581 if (!strcmp(name, "vlan_id")) {
1582 len = num_arg(&user_buffer[i], 4, &value);
1583 if (len < 0)
1584 return len;
1585
1586 i += len;
1587 if (value <= 4095) {
1588 pkt_dev->vlan_id = value; /* turn on VLAN */
1589
1590 if (debug)
1591 pr_debug("VLAN turned on\n");
1592
1593 if (debug && pkt_dev->nr_labels)
1594 pr_debug("MPLS auto turned off\n");
1595
1596 pkt_dev->nr_labels = 0; /* turn off MPLS */
1597 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1598 } else {
1599 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1600 pkt_dev->svlan_id = 0xffff;
1601
1602 if (debug)
1603 pr_debug("VLAN/SVLAN turned off\n");
1604 }
1605 return count;
1606 }
1607
1608 if (!strcmp(name, "vlan_p")) {
1609 len = num_arg(&user_buffer[i], 1, &value);
1610 if (len < 0)
1611 return len;
1612
1613 i += len;
1614 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1615 pkt_dev->vlan_p = value;
1616 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1617 } else {
1618 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1619 }
1620 return count;
1621 }
1622
1623 if (!strcmp(name, "vlan_cfi")) {
1624 len = num_arg(&user_buffer[i], 1, &value);
1625 if (len < 0)
1626 return len;
1627
1628 i += len;
1629 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1630 pkt_dev->vlan_cfi = value;
1631 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1632 } else {
1633 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1634 }
1635 return count;
1636 }
1637
1638 if (!strcmp(name, "svlan_id")) {
1639 len = num_arg(&user_buffer[i], 4, &value);
1640 if (len < 0)
1641 return len;
1642
1643 i += len;
1644 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1645 pkt_dev->svlan_id = value; /* turn on SVLAN */
1646
1647 if (debug)
1648 pr_debug("SVLAN turned on\n");
1649
1650 if (debug && pkt_dev->nr_labels)
1651 pr_debug("MPLS auto turned off\n");
1652
1653 pkt_dev->nr_labels = 0; /* turn off MPLS */
1654 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1655 } else {
1656 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1657 pkt_dev->svlan_id = 0xffff;
1658
1659 if (debug)
1660 pr_debug("VLAN/SVLAN turned off\n");
1661 }
1662 return count;
1663 }
1664
1665 if (!strcmp(name, "svlan_p")) {
1666 len = num_arg(&user_buffer[i], 1, &value);
1667 if (len < 0)
1668 return len;
1669
1670 i += len;
1671 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1672 pkt_dev->svlan_p = value;
1673 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1674 } else {
1675 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1676 }
1677 return count;
1678 }
1679
1680 if (!strcmp(name, "svlan_cfi")) {
1681 len = num_arg(&user_buffer[i], 1, &value);
1682 if (len < 0)
1683 return len;
1684
1685 i += len;
1686 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1687 pkt_dev->svlan_cfi = value;
1688 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1689 } else {
1690 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1691 }
1692 return count;
1693 }
1694
1695 if (!strcmp(name, "tos")) {
1696 __u32 tmp_value = 0;
1697 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1698 if (len < 0)
1699 return len;
1700
1701 i += len;
1702 if (len == 2) {
1703 pkt_dev->tos = tmp_value;
1704 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1705 } else {
1706 sprintf(pg_result, "ERROR: tos must be 00-ff");
1707 }
1708 return count;
1709 }
1710
1711 if (!strcmp(name, "traffic_class")) {
1712 __u32 tmp_value = 0;
1713 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1714 if (len < 0)
1715 return len;
1716
1717 i += len;
1718 if (len == 2) {
1719 pkt_dev->traffic_class = tmp_value;
1720 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1721 } else {
1722 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1723 }
1724 return count;
1725 }
1726
1727 if (!strcmp(name, "skb_priority")) {
1728 len = num_arg(&user_buffer[i], 9, &value);
1729 if (len < 0)
1730 return len;
1731
1732 i += len;
1733 pkt_dev->skb_priority = value;
1734 sprintf(pg_result, "OK: skb_priority=%i",
1735 pkt_dev->skb_priority);
1736 return count;
1737 }
1738
1739 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1740 return -EINVAL;
1741 }
1742
1743 static int pktgen_if_open(struct inode *inode, struct file *file)
1744 {
1745 return single_open(file, pktgen_if_show, PDE_DATA(inode));
1746 }
1747
1748 static const struct file_operations pktgen_if_fops = {
1749 .owner = THIS_MODULE,
1750 .open = pktgen_if_open,
1751 .read = seq_read,
1752 .llseek = seq_lseek,
1753 .write = pktgen_if_write,
1754 .release = single_release,
1755 };
1756
1757 static int pktgen_thread_show(struct seq_file *seq, void *v)
1758 {
1759 struct pktgen_thread *t = seq->private;
1760 const struct pktgen_dev *pkt_dev;
1761
1762 BUG_ON(!t);
1763
1764 seq_puts(seq, "Running: ");
1765
1766 rcu_read_lock();
1767 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1768 if (pkt_dev->running)
1769 seq_printf(seq, "%s ", pkt_dev->odevname);
1770
1771 seq_puts(seq, "\nStopped: ");
1772
1773 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1774 if (!pkt_dev->running)
1775 seq_printf(seq, "%s ", pkt_dev->odevname);
1776
1777 if (t->result[0])
1778 seq_printf(seq, "\nResult: %s\n", t->result);
1779 else
1780 seq_puts(seq, "\nResult: NA\n");
1781
1782 rcu_read_unlock();
1783
1784 return 0;
1785 }
1786
1787 static ssize_t pktgen_thread_write(struct file *file,
1788 const char __user * user_buffer,
1789 size_t count, loff_t * offset)
1790 {
1791 struct seq_file *seq = file->private_data;
1792 struct pktgen_thread *t = seq->private;
1793 int i, max, len, ret;
1794 char name[40];
1795 char *pg_result;
1796
1797 if (count < 1) {
1798 // sprintf(pg_result, "Wrong command format");
1799 return -EINVAL;
1800 }
1801
1802 max = count;
1803 len = count_trail_chars(user_buffer, max);
1804 if (len < 0)
1805 return len;
1806
1807 i = len;
1808
1809 /* Read variable name */
1810
1811 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1812 if (len < 0)
1813 return len;
1814
1815 memset(name, 0, sizeof(name));
1816 if (copy_from_user(name, &user_buffer[i], len))
1817 return -EFAULT;
1818 i += len;
1819
1820 max = count - i;
1821 len = count_trail_chars(&user_buffer[i], max);
1822 if (len < 0)
1823 return len;
1824
1825 i += len;
1826
1827 if (debug)
1828 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
1829
1830 if (!t) {
1831 pr_err("ERROR: No thread\n");
1832 ret = -EINVAL;
1833 goto out;
1834 }
1835
1836 pg_result = &(t->result[0]);
1837
1838 if (!strcmp(name, "add_device")) {
1839 char f[32];
1840 memset(f, 0, 32);
1841 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1842 if (len < 0) {
1843 ret = len;
1844 goto out;
1845 }
1846 if (copy_from_user(f, &user_buffer[i], len))
1847 return -EFAULT;
1848 i += len;
1849 mutex_lock(&pktgen_thread_lock);
1850 ret = pktgen_add_device(t, f);
1851 mutex_unlock(&pktgen_thread_lock);
1852 if (!ret) {
1853 ret = count;
1854 sprintf(pg_result, "OK: add_device=%s", f);
1855 } else
1856 sprintf(pg_result, "ERROR: can not add device %s", f);
1857 goto out;
1858 }
1859
1860 if (!strcmp(name, "rem_device_all")) {
1861 mutex_lock(&pktgen_thread_lock);
1862 t->control |= T_REMDEVALL;
1863 mutex_unlock(&pktgen_thread_lock);
1864 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1865 ret = count;
1866 sprintf(pg_result, "OK: rem_device_all");
1867 goto out;
1868 }
1869
1870 if (!strcmp(name, "max_before_softirq")) {
1871 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1872 ret = count;
1873 goto out;
1874 }
1875
1876 ret = -EINVAL;
1877 out:
1878 return ret;
1879 }
1880
1881 static int pktgen_thread_open(struct inode *inode, struct file *file)
1882 {
1883 return single_open(file, pktgen_thread_show, PDE_DATA(inode));
1884 }
1885
1886 static const struct file_operations pktgen_thread_fops = {
1887 .owner = THIS_MODULE,
1888 .open = pktgen_thread_open,
1889 .read = seq_read,
1890 .llseek = seq_lseek,
1891 .write = pktgen_thread_write,
1892 .release = single_release,
1893 };
1894
1895 /* Think find or remove for NN */
1896 static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn,
1897 const char *ifname, int remove)
1898 {
1899 struct pktgen_thread *t;
1900 struct pktgen_dev *pkt_dev = NULL;
1901 bool exact = (remove == FIND);
1902
1903 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1904 pkt_dev = pktgen_find_dev(t, ifname, exact);
1905 if (pkt_dev) {
1906 if (remove) {
1907 pkt_dev->removal_mark = 1;
1908 t->control |= T_REMDEV;
1909 }
1910 break;
1911 }
1912 }
1913 return pkt_dev;
1914 }
1915
1916 /*
1917 * mark a device for removal
1918 */
1919 static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname)
1920 {
1921 struct pktgen_dev *pkt_dev = NULL;
1922 const int max_tries = 10, msec_per_try = 125;
1923 int i = 0;
1924
1925 mutex_lock(&pktgen_thread_lock);
1926 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1927
1928 while (1) {
1929
1930 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE);
1931 if (pkt_dev == NULL)
1932 break; /* success */
1933
1934 mutex_unlock(&pktgen_thread_lock);
1935 pr_debug("%s: waiting for %s to disappear....\n",
1936 __func__, ifname);
1937 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1938 mutex_lock(&pktgen_thread_lock);
1939
1940 if (++i >= max_tries) {
1941 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1942 __func__, msec_per_try * i, ifname);
1943 break;
1944 }
1945
1946 }
1947
1948 mutex_unlock(&pktgen_thread_lock);
1949 }
1950
1951 static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev)
1952 {
1953 struct pktgen_thread *t;
1954
1955 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1956 struct pktgen_dev *pkt_dev;
1957
1958 rcu_read_lock();
1959 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
1960 if (pkt_dev->odev != dev)
1961 continue;
1962
1963 proc_remove(pkt_dev->entry);
1964
1965 pkt_dev->entry = proc_create_data(dev->name, 0600,
1966 pn->proc_dir,
1967 &pktgen_if_fops,
1968 pkt_dev);
1969 if (!pkt_dev->entry)
1970 pr_err("can't move proc entry for '%s'\n",
1971 dev->name);
1972 break;
1973 }
1974 rcu_read_unlock();
1975 }
1976 }
1977
1978 static int pktgen_device_event(struct notifier_block *unused,
1979 unsigned long event, void *ptr)
1980 {
1981 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1982 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id);
1983
1984 if (pn->pktgen_exiting)
1985 return NOTIFY_DONE;
1986
1987 /* It is OK that we do not hold the group lock right now,
1988 * as we run under the RTNL lock.
1989 */
1990
1991 switch (event) {
1992 case NETDEV_CHANGENAME:
1993 pktgen_change_name(pn, dev);
1994 break;
1995
1996 case NETDEV_UNREGISTER:
1997 pktgen_mark_device(pn, dev->name);
1998 break;
1999 }
2000
2001 return NOTIFY_DONE;
2002 }
2003
2004 static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn,
2005 struct pktgen_dev *pkt_dev,
2006 const char *ifname)
2007 {
2008 char b[IFNAMSIZ+5];
2009 int i;
2010
2011 for (i = 0; ifname[i] != '@'; i++) {
2012 if (i == IFNAMSIZ)
2013 break;
2014
2015 b[i] = ifname[i];
2016 }
2017 b[i] = 0;
2018
2019 return dev_get_by_name(pn->net, b);
2020 }
2021
2022
2023 /* Associate pktgen_dev with a device. */
2024
2025 static int pktgen_setup_dev(const struct pktgen_net *pn,
2026 struct pktgen_dev *pkt_dev, const char *ifname)
2027 {
2028 struct net_device *odev;
2029 int err;
2030
2031 /* Clean old setups */
2032 if (pkt_dev->odev) {
2033 dev_put(pkt_dev->odev);
2034 pkt_dev->odev = NULL;
2035 }
2036
2037 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname);
2038 if (!odev) {
2039 pr_err("no such netdevice: \"%s\"\n", ifname);
2040 return -ENODEV;
2041 }
2042
2043 if (odev->type != ARPHRD_ETHER) {
2044 pr_err("not an ethernet device: \"%s\"\n", ifname);
2045 err = -EINVAL;
2046 } else if (!netif_running(odev)) {
2047 pr_err("device is down: \"%s\"\n", ifname);
2048 err = -ENETDOWN;
2049 } else {
2050 pkt_dev->odev = odev;
2051 return 0;
2052 }
2053
2054 dev_put(odev);
2055 return err;
2056 }
2057
2058 /* Read pkt_dev from the interface and set up internal pktgen_dev
2059 * structure to have the right information to create/send packets
2060 */
2061 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2062 {
2063 int ntxq;
2064
2065 if (!pkt_dev->odev) {
2066 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2067 sprintf(pkt_dev->result,
2068 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2069 return;
2070 }
2071
2072 /* make sure that we don't pick a non-existing transmit queue */
2073 ntxq = pkt_dev->odev->real_num_tx_queues;
2074
2075 if (ntxq <= pkt_dev->queue_map_min) {
2076 pr_warn("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2077 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2078 pkt_dev->odevname);
2079 pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2080 }
2081 if (pkt_dev->queue_map_max >= ntxq) {
2082 pr_warn("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2083 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2084 pkt_dev->odevname);
2085 pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2086 }
2087
2088 /* Default to the interface's mac if not explicitly set. */
2089
2090 if (is_zero_ether_addr(pkt_dev->src_mac))
2091 ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr);
2092
2093 /* Set up Dest MAC */
2094 ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac);
2095
2096 if (pkt_dev->flags & F_IPV6) {
2097 int i, set = 0, err = 1;
2098 struct inet6_dev *idev;
2099
2100 if (pkt_dev->min_pkt_size == 0) {
2101 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
2102 + sizeof(struct udphdr)
2103 + sizeof(struct pktgen_hdr)
2104 + pkt_dev->pkt_overhead;
2105 }
2106
2107 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2108 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2109 set = 1;
2110 break;
2111 }
2112
2113 if (!set) {
2114
2115 /*
2116 * Use linklevel address if unconfigured.
2117 *
2118 * use ipv6_get_lladdr if/when it's get exported
2119 */
2120
2121 rcu_read_lock();
2122 idev = __in6_dev_get(pkt_dev->odev);
2123 if (idev) {
2124 struct inet6_ifaddr *ifp;
2125
2126 read_lock_bh(&idev->lock);
2127 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2128 if ((ifp->scope & IFA_LINK) &&
2129 !(ifp->flags & IFA_F_TENTATIVE)) {
2130 pkt_dev->cur_in6_saddr = ifp->addr;
2131 err = 0;
2132 break;
2133 }
2134 }
2135 read_unlock_bh(&idev->lock);
2136 }
2137 rcu_read_unlock();
2138 if (err)
2139 pr_err("ERROR: IPv6 link address not available\n");
2140 }
2141 } else {
2142 if (pkt_dev->min_pkt_size == 0) {
2143 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
2144 + sizeof(struct udphdr)
2145 + sizeof(struct pktgen_hdr)
2146 + pkt_dev->pkt_overhead;
2147 }
2148
2149 pkt_dev->saddr_min = 0;
2150 pkt_dev->saddr_max = 0;
2151 if (strlen(pkt_dev->src_min) == 0) {
2152
2153 struct in_device *in_dev;
2154
2155 rcu_read_lock();
2156 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2157 if (in_dev) {
2158 if (in_dev->ifa_list) {
2159 pkt_dev->saddr_min =
2160 in_dev->ifa_list->ifa_address;
2161 pkt_dev->saddr_max = pkt_dev->saddr_min;
2162 }
2163 }
2164 rcu_read_unlock();
2165 } else {
2166 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2167 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2168 }
2169
2170 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2171 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2172 }
2173 /* Initialize current values. */
2174 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2175 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
2176 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
2177
2178 pkt_dev->cur_dst_mac_offset = 0;
2179 pkt_dev->cur_src_mac_offset = 0;
2180 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2181 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2182 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2183 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2184 pkt_dev->nflows = 0;
2185 }
2186
2187
2188 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2189 {
2190 ktime_t start_time, end_time;
2191 s64 remaining;
2192 struct hrtimer_sleeper t;
2193
2194 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2195 hrtimer_set_expires(&t.timer, spin_until);
2196
2197 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2198 if (remaining <= 0) {
2199 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2200 return;
2201 }
2202
2203 start_time = ktime_get();
2204 if (remaining < 100000) {
2205 /* for small delays (<100us), just loop until limit is reached */
2206 do {
2207 end_time = ktime_get();
2208 } while (ktime_compare(end_time, spin_until) < 0);
2209 } else {
2210 /* see do_nanosleep */
2211 hrtimer_init_sleeper(&t, current);
2212 do {
2213 set_current_state(TASK_INTERRUPTIBLE);
2214 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2215 if (!hrtimer_active(&t.timer))
2216 t.task = NULL;
2217
2218 if (likely(t.task))
2219 schedule();
2220
2221 hrtimer_cancel(&t.timer);
2222 } while (t.task && pkt_dev->running && !signal_pending(current));
2223 __set_current_state(TASK_RUNNING);
2224 end_time = ktime_get();
2225 }
2226
2227 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2228 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2229 }
2230
2231 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2232 {
2233 pkt_dev->pkt_overhead = 0;
2234 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2235 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2236 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2237 }
2238
2239 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2240 {
2241 return !!(pkt_dev->flows[flow].flags & F_INIT);
2242 }
2243
2244 static inline int f_pick(struct pktgen_dev *pkt_dev)
2245 {
2246 int flow = pkt_dev->curfl;
2247
2248 if (pkt_dev->flags & F_FLOW_SEQ) {
2249 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2250 /* reset time */
2251 pkt_dev->flows[flow].count = 0;
2252 pkt_dev->flows[flow].flags = 0;
2253 pkt_dev->curfl += 1;
2254 if (pkt_dev->curfl >= pkt_dev->cflows)
2255 pkt_dev->curfl = 0; /*reset */
2256 }
2257 } else {
2258 flow = prandom_u32() % pkt_dev->cflows;
2259 pkt_dev->curfl = flow;
2260
2261 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2262 pkt_dev->flows[flow].count = 0;
2263 pkt_dev->flows[flow].flags = 0;
2264 }
2265 }
2266
2267 return pkt_dev->curfl;
2268 }
2269
2270
2271 #ifdef CONFIG_XFRM
2272 /* If there was already an IPSEC SA, we keep it as is, else
2273 * we go look for it ...
2274 */
2275 #define DUMMY_MARK 0
2276 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2277 {
2278 struct xfrm_state *x = pkt_dev->flows[flow].x;
2279 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
2280 if (!x) {
2281
2282 if (pkt_dev->spi) {
2283 /* We need as quick as possible to find the right SA
2284 * Searching with minimum criteria to archieve this.
2285 */
2286 x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET);
2287 } else {
2288 /* slow path: we dont already have xfrm_state */
2289 x = xfrm_stateonly_find(pn->net, DUMMY_MARK,
2290 (xfrm_address_t *)&pkt_dev->cur_daddr,
2291 (xfrm_address_t *)&pkt_dev->cur_saddr,
2292 AF_INET,
2293 pkt_dev->ipsmode,
2294 pkt_dev->ipsproto, 0);
2295 }
2296 if (x) {
2297 pkt_dev->flows[flow].x = x;
2298 set_pkt_overhead(pkt_dev);
2299 pkt_dev->pkt_overhead += x->props.header_len;
2300 }
2301
2302 }
2303 }
2304 #endif
2305 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2306 {
2307
2308 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2309 pkt_dev->cur_queue_map = smp_processor_id();
2310
2311 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2312 __u16 t;
2313 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2314 t = prandom_u32() %
2315 (pkt_dev->queue_map_max -
2316 pkt_dev->queue_map_min + 1)
2317 + pkt_dev->queue_map_min;
2318 } else {
2319 t = pkt_dev->cur_queue_map + 1;
2320 if (t > pkt_dev->queue_map_max)
2321 t = pkt_dev->queue_map_min;
2322 }
2323 pkt_dev->cur_queue_map = t;
2324 }
2325 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2326 }
2327
2328 /* Increment/randomize headers according to flags and current values
2329 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2330 */
2331 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2332 {
2333 __u32 imn;
2334 __u32 imx;
2335 int flow = 0;
2336
2337 if (pkt_dev->cflows)
2338 flow = f_pick(pkt_dev);
2339
2340 /* Deal with source MAC */
2341 if (pkt_dev->src_mac_count > 1) {
2342 __u32 mc;
2343 __u32 tmp;
2344
2345 if (pkt_dev->flags & F_MACSRC_RND)
2346 mc = prandom_u32() % pkt_dev->src_mac_count;
2347 else {
2348 mc = pkt_dev->cur_src_mac_offset++;
2349 if (pkt_dev->cur_src_mac_offset >=
2350 pkt_dev->src_mac_count)
2351 pkt_dev->cur_src_mac_offset = 0;
2352 }
2353
2354 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2355 pkt_dev->hh[11] = tmp;
2356 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2357 pkt_dev->hh[10] = tmp;
2358 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2359 pkt_dev->hh[9] = tmp;
2360 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2361 pkt_dev->hh[8] = tmp;
2362 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2363 pkt_dev->hh[7] = tmp;
2364 }
2365
2366 /* Deal with Destination MAC */
2367 if (pkt_dev->dst_mac_count > 1) {
2368 __u32 mc;
2369 __u32 tmp;
2370
2371 if (pkt_dev->flags & F_MACDST_RND)
2372 mc = prandom_u32() % pkt_dev->dst_mac_count;
2373
2374 else {
2375 mc = pkt_dev->cur_dst_mac_offset++;
2376 if (pkt_dev->cur_dst_mac_offset >=
2377 pkt_dev->dst_mac_count) {
2378 pkt_dev->cur_dst_mac_offset = 0;
2379 }
2380 }
2381
2382 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2383 pkt_dev->hh[5] = tmp;
2384 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2385 pkt_dev->hh[4] = tmp;
2386 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2387 pkt_dev->hh[3] = tmp;
2388 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2389 pkt_dev->hh[2] = tmp;
2390 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2391 pkt_dev->hh[1] = tmp;
2392 }
2393
2394 if (pkt_dev->flags & F_MPLS_RND) {
2395 unsigned int i;
2396 for (i = 0; i < pkt_dev->nr_labels; i++)
2397 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2398 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2399 ((__force __be32)prandom_u32() &
2400 htonl(0x000fffff));
2401 }
2402
2403 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2404 pkt_dev->vlan_id = prandom_u32() & (4096 - 1);
2405 }
2406
2407 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2408 pkt_dev->svlan_id = prandom_u32() & (4096 - 1);
2409 }
2410
2411 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2412 if (pkt_dev->flags & F_UDPSRC_RND)
2413 pkt_dev->cur_udp_src = prandom_u32() %
2414 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2415 + pkt_dev->udp_src_min;
2416
2417 else {
2418 pkt_dev->cur_udp_src++;
2419 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2420 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2421 }
2422 }
2423
2424 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2425 if (pkt_dev->flags & F_UDPDST_RND) {
2426 pkt_dev->cur_udp_dst = prandom_u32() %
2427 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2428 + pkt_dev->udp_dst_min;
2429 } else {
2430 pkt_dev->cur_udp_dst++;
2431 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2432 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2433 }
2434 }
2435
2436 if (!(pkt_dev->flags & F_IPV6)) {
2437
2438 imn = ntohl(pkt_dev->saddr_min);
2439 imx = ntohl(pkt_dev->saddr_max);
2440 if (imn < imx) {
2441 __u32 t;
2442 if (pkt_dev->flags & F_IPSRC_RND)
2443 t = prandom_u32() % (imx - imn) + imn;
2444 else {
2445 t = ntohl(pkt_dev->cur_saddr);
2446 t++;
2447 if (t > imx)
2448 t = imn;
2449
2450 }
2451 pkt_dev->cur_saddr = htonl(t);
2452 }
2453
2454 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2455 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2456 } else {
2457 imn = ntohl(pkt_dev->daddr_min);
2458 imx = ntohl(pkt_dev->daddr_max);
2459 if (imn < imx) {
2460 __u32 t;
2461 __be32 s;
2462 if (pkt_dev->flags & F_IPDST_RND) {
2463
2464 do {
2465 t = prandom_u32() %
2466 (imx - imn) + imn;
2467 s = htonl(t);
2468 } while (ipv4_is_loopback(s) ||
2469 ipv4_is_multicast(s) ||
2470 ipv4_is_lbcast(s) ||
2471 ipv4_is_zeronet(s) ||
2472 ipv4_is_local_multicast(s));
2473 pkt_dev->cur_daddr = s;
2474 } else {
2475 t = ntohl(pkt_dev->cur_daddr);
2476 t++;
2477 if (t > imx) {
2478 t = imn;
2479 }
2480 pkt_dev->cur_daddr = htonl(t);
2481 }
2482 }
2483 if (pkt_dev->cflows) {
2484 pkt_dev->flows[flow].flags |= F_INIT;
2485 pkt_dev->flows[flow].cur_daddr =
2486 pkt_dev->cur_daddr;
2487 #ifdef CONFIG_XFRM
2488 if (pkt_dev->flags & F_IPSEC_ON)
2489 get_ipsec_sa(pkt_dev, flow);
2490 #endif
2491 pkt_dev->nflows++;
2492 }
2493 }
2494 } else { /* IPV6 * */
2495
2496 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
2497 int i;
2498
2499 /* Only random destinations yet */
2500
2501 for (i = 0; i < 4; i++) {
2502 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2503 (((__force __be32)prandom_u32() |
2504 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2505 pkt_dev->max_in6_daddr.s6_addr32[i]);
2506 }
2507 }
2508 }
2509
2510 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2511 __u32 t;
2512 if (pkt_dev->flags & F_TXSIZE_RND) {
2513 t = prandom_u32() %
2514 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2515 + pkt_dev->min_pkt_size;
2516 } else {
2517 t = pkt_dev->cur_pkt_size + 1;
2518 if (t > pkt_dev->max_pkt_size)
2519 t = pkt_dev->min_pkt_size;
2520 }
2521 pkt_dev->cur_pkt_size = t;
2522 }
2523
2524 set_cur_queue_map(pkt_dev);
2525
2526 pkt_dev->flows[flow].count++;
2527 }
2528
2529
2530 #ifdef CONFIG_XFRM
2531 static u32 pktgen_dst_metrics[RTAX_MAX + 1] = {
2532
2533 [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */
2534 };
2535
2536 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2537 {
2538 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2539 int err = 0;
2540 struct net *net = dev_net(pkt_dev->odev);
2541
2542 if (!x)
2543 return 0;
2544 /* XXX: we dont support tunnel mode for now until
2545 * we resolve the dst issue */
2546 if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0))
2547 return 0;
2548
2549 /* But when user specify an valid SPI, transformation
2550 * supports both transport/tunnel mode + ESP/AH type.
2551 */
2552 if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0))
2553 skb->_skb_refdst = (unsigned long)&pkt_dev->dst | SKB_DST_NOREF;
2554
2555 rcu_read_lock_bh();
2556 err = x->outer_mode->output(x, skb);
2557 rcu_read_unlock_bh();
2558 if (err) {
2559 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR);
2560 goto error;
2561 }
2562 err = x->type->output(x, skb);
2563 if (err) {
2564 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR);
2565 goto error;
2566 }
2567 spin_lock_bh(&x->lock);
2568 x->curlft.bytes += skb->len;
2569 x->curlft.packets++;
2570 spin_unlock_bh(&x->lock);
2571 error:
2572 return err;
2573 }
2574
2575 static void free_SAs(struct pktgen_dev *pkt_dev)
2576 {
2577 if (pkt_dev->cflows) {
2578 /* let go of the SAs if we have them */
2579 int i;
2580 for (i = 0; i < pkt_dev->cflows; i++) {
2581 struct xfrm_state *x = pkt_dev->flows[i].x;
2582 if (x) {
2583 xfrm_state_put(x);
2584 pkt_dev->flows[i].x = NULL;
2585 }
2586 }
2587 }
2588 }
2589
2590 static int process_ipsec(struct pktgen_dev *pkt_dev,
2591 struct sk_buff *skb, __be16 protocol)
2592 {
2593 if (pkt_dev->flags & F_IPSEC_ON) {
2594 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2595 int nhead = 0;
2596 if (x) {
2597 int ret;
2598 __u8 *eth;
2599 struct iphdr *iph;
2600
2601 nhead = x->props.header_len - skb_headroom(skb);
2602 if (nhead > 0) {
2603 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2604 if (ret < 0) {
2605 pr_err("Error expanding ipsec packet %d\n",
2606 ret);
2607 goto err;
2608 }
2609 }
2610
2611 /* ipsec is not expecting ll header */
2612 skb_pull(skb, ETH_HLEN);
2613 ret = pktgen_output_ipsec(skb, pkt_dev);
2614 if (ret) {
2615 pr_err("Error creating ipsec packet %d\n", ret);
2616 goto err;
2617 }
2618 /* restore ll */
2619 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2620 memcpy(eth, pkt_dev->hh, 12);
2621 *(u16 *) &eth[12] = protocol;
2622
2623 /* Update IPv4 header len as well as checksum value */
2624 iph = ip_hdr(skb);
2625 iph->tot_len = htons(skb->len - ETH_HLEN);
2626 ip_send_check(iph);
2627 }
2628 }
2629 return 1;
2630 err:
2631 kfree_skb(skb);
2632 return 0;
2633 }
2634 #endif
2635
2636 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2637 {
2638 unsigned int i;
2639 for (i = 0; i < pkt_dev->nr_labels; i++)
2640 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2641
2642 mpls--;
2643 *mpls |= MPLS_STACK_BOTTOM;
2644 }
2645
2646 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2647 unsigned int prio)
2648 {
2649 return htons(id | (cfi << 12) | (prio << 13));
2650 }
2651
2652 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2653 int datalen)
2654 {
2655 struct timeval timestamp;
2656 struct pktgen_hdr *pgh;
2657
2658 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
2659 datalen -= sizeof(*pgh);
2660
2661 if (pkt_dev->nfrags <= 0) {
2662 memset(skb_put(skb, datalen), 0, datalen);
2663 } else {
2664 int frags = pkt_dev->nfrags;
2665 int i, len;
2666 int frag_len;
2667
2668
2669 if (frags > MAX_SKB_FRAGS)
2670 frags = MAX_SKB_FRAGS;
2671 len = datalen - frags * PAGE_SIZE;
2672 if (len > 0) {
2673 memset(skb_put(skb, len), 0, len);
2674 datalen = frags * PAGE_SIZE;
2675 }
2676
2677 i = 0;
2678 frag_len = (datalen/frags) < PAGE_SIZE ?
2679 (datalen/frags) : PAGE_SIZE;
2680 while (datalen > 0) {
2681 if (unlikely(!pkt_dev->page)) {
2682 int node = numa_node_id();
2683
2684 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2685 node = pkt_dev->node;
2686 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2687 if (!pkt_dev->page)
2688 break;
2689 }
2690 get_page(pkt_dev->page);
2691 skb_frag_set_page(skb, i, pkt_dev->page);
2692 skb_shinfo(skb)->frags[i].page_offset = 0;
2693 /*last fragment, fill rest of data*/
2694 if (i == (frags - 1))
2695 skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2696 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2697 else
2698 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2699 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2700 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2701 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2702 i++;
2703 skb_shinfo(skb)->nr_frags = i;
2704 }
2705 }
2706
2707 /* Stamp the time, and sequence number,
2708 * convert them to network byte order
2709 */
2710 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2711 pgh->seq_num = htonl(pkt_dev->seq_num);
2712
2713 if (pkt_dev->flags & F_NO_TIMESTAMP) {
2714 pgh->tv_sec = 0;
2715 pgh->tv_usec = 0;
2716 } else {
2717 do_gettimeofday(&timestamp);
2718 pgh->tv_sec = htonl(timestamp.tv_sec);
2719 pgh->tv_usec = htonl(timestamp.tv_usec);
2720 }
2721 }
2722
2723 static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
2724 struct pktgen_dev *pkt_dev,
2725 unsigned int extralen)
2726 {
2727 struct sk_buff *skb = NULL;
2728 unsigned int size = pkt_dev->cur_pkt_size + 64 + extralen +
2729 pkt_dev->pkt_overhead;
2730
2731 if (pkt_dev->flags & F_NODE) {
2732 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id();
2733
2734 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node);
2735 if (likely(skb)) {
2736 skb_reserve(skb, NET_SKB_PAD);
2737 skb->dev = dev;
2738 }
2739 } else {
2740 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
2741 }
2742
2743 return skb;
2744 }
2745
2746 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2747 struct pktgen_dev *pkt_dev)
2748 {
2749 struct sk_buff *skb = NULL;
2750 __u8 *eth;
2751 struct udphdr *udph;
2752 int datalen, iplen;
2753 struct iphdr *iph;
2754 __be16 protocol = htons(ETH_P_IP);
2755 __be32 *mpls;
2756 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2757 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2758 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2759 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2760 u16 queue_map;
2761
2762 if (pkt_dev->nr_labels)
2763 protocol = htons(ETH_P_MPLS_UC);
2764
2765 if (pkt_dev->vlan_id != 0xffff)
2766 protocol = htons(ETH_P_8021Q);
2767
2768 /* Update any of the values, used when we're incrementing various
2769 * fields.
2770 */
2771 mod_cur_headers(pkt_dev);
2772 queue_map = pkt_dev->cur_queue_map;
2773
2774 datalen = (odev->hard_header_len + 16) & ~0xf;
2775
2776 skb = pktgen_alloc_skb(odev, pkt_dev, datalen);
2777 if (!skb) {
2778 sprintf(pkt_dev->result, "No memory");
2779 return NULL;
2780 }
2781
2782 prefetchw(skb->data);
2783 skb_reserve(skb, datalen);
2784
2785 /* Reserve for ethernet and IP header */
2786 eth = (__u8 *) skb_push(skb, 14);
2787 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2788 if (pkt_dev->nr_labels)
2789 mpls_push(mpls, pkt_dev);
2790
2791 if (pkt_dev->vlan_id != 0xffff) {
2792 if (pkt_dev->svlan_id != 0xffff) {
2793 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2794 *svlan_tci = build_tci(pkt_dev->svlan_id,
2795 pkt_dev->svlan_cfi,
2796 pkt_dev->svlan_p);
2797 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2798 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2799 }
2800 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2801 *vlan_tci = build_tci(pkt_dev->vlan_id,
2802 pkt_dev->vlan_cfi,
2803 pkt_dev->vlan_p);
2804 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2805 *vlan_encapsulated_proto = htons(ETH_P_IP);
2806 }
2807
2808 skb_set_mac_header(skb, 0);
2809 skb_set_network_header(skb, skb->len);
2810 iph = (struct iphdr *) skb_put(skb, sizeof(struct iphdr));
2811
2812 skb_set_transport_header(skb, skb->len);
2813 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2814 skb_set_queue_mapping(skb, queue_map);
2815 skb->priority = pkt_dev->skb_priority;
2816
2817 memcpy(eth, pkt_dev->hh, 12);
2818 *(__be16 *) & eth[12] = protocol;
2819
2820 /* Eth + IPh + UDPh + mpls */
2821 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2822 pkt_dev->pkt_overhead;
2823 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
2824 datalen = sizeof(struct pktgen_hdr);
2825
2826 udph->source = htons(pkt_dev->cur_udp_src);
2827 udph->dest = htons(pkt_dev->cur_udp_dst);
2828 udph->len = htons(datalen + 8); /* DATA + udphdr */
2829 udph->check = 0;
2830
2831 iph->ihl = 5;
2832 iph->version = 4;
2833 iph->ttl = 32;
2834 iph->tos = pkt_dev->tos;
2835 iph->protocol = IPPROTO_UDP; /* UDP */
2836 iph->saddr = pkt_dev->cur_saddr;
2837 iph->daddr = pkt_dev->cur_daddr;
2838 iph->id = htons(pkt_dev->ip_id);
2839 pkt_dev->ip_id++;
2840 iph->frag_off = 0;
2841 iplen = 20 + 8 + datalen;
2842 iph->tot_len = htons(iplen);
2843 ip_send_check(iph);
2844 skb->protocol = protocol;
2845 skb->dev = odev;
2846 skb->pkt_type = PACKET_HOST;
2847
2848 pktgen_finalize_skb(pkt_dev, skb, datalen);
2849
2850 if (!(pkt_dev->flags & F_UDPCSUM)) {
2851 skb->ip_summed = CHECKSUM_NONE;
2852 } else if (odev->features & NETIF_F_V4_CSUM) {
2853 skb->ip_summed = CHECKSUM_PARTIAL;
2854 skb->csum = 0;
2855 udp4_hwcsum(skb, iph->saddr, iph->daddr);
2856 } else {
2857 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), datalen + 8, 0);
2858
2859 /* add protocol-dependent pseudo-header */
2860 udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
2861 datalen + 8, IPPROTO_UDP, csum);
2862
2863 if (udph->check == 0)
2864 udph->check = CSUM_MANGLED_0;
2865 }
2866
2867 #ifdef CONFIG_XFRM
2868 if (!process_ipsec(pkt_dev, skb, protocol))
2869 return NULL;
2870 #endif
2871
2872 return skb;
2873 }
2874
2875 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2876 struct pktgen_dev *pkt_dev)
2877 {
2878 struct sk_buff *skb = NULL;
2879 __u8 *eth;
2880 struct udphdr *udph;
2881 int datalen, udplen;
2882 struct ipv6hdr *iph;
2883 __be16 protocol = htons(ETH_P_IPV6);
2884 __be32 *mpls;
2885 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2886 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2887 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2888 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2889 u16 queue_map;
2890
2891 if (pkt_dev->nr_labels)
2892 protocol = htons(ETH_P_MPLS_UC);
2893
2894 if (pkt_dev->vlan_id != 0xffff)
2895 protocol = htons(ETH_P_8021Q);
2896
2897 /* Update any of the values, used when we're incrementing various
2898 * fields.
2899 */
2900 mod_cur_headers(pkt_dev);
2901 queue_map = pkt_dev->cur_queue_map;
2902
2903 skb = pktgen_alloc_skb(odev, pkt_dev, 16);
2904 if (!skb) {
2905 sprintf(pkt_dev->result, "No memory");
2906 return NULL;
2907 }
2908
2909 prefetchw(skb->data);
2910 skb_reserve(skb, 16);
2911
2912 /* Reserve for ethernet and IP header */
2913 eth = (__u8 *) skb_push(skb, 14);
2914 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2915 if (pkt_dev->nr_labels)
2916 mpls_push(mpls, pkt_dev);
2917
2918 if (pkt_dev->vlan_id != 0xffff) {
2919 if (pkt_dev->svlan_id != 0xffff) {
2920 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2921 *svlan_tci = build_tci(pkt_dev->svlan_id,
2922 pkt_dev->svlan_cfi,
2923 pkt_dev->svlan_p);
2924 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2925 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2926 }
2927 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2928 *vlan_tci = build_tci(pkt_dev->vlan_id,
2929 pkt_dev->vlan_cfi,
2930 pkt_dev->vlan_p);
2931 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2932 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2933 }
2934
2935 skb_set_mac_header(skb, 0);
2936 skb_set_network_header(skb, skb->len);
2937 iph = (struct ipv6hdr *) skb_put(skb, sizeof(struct ipv6hdr));
2938
2939 skb_set_transport_header(skb, skb->len);
2940 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2941 skb_set_queue_mapping(skb, queue_map);
2942 skb->priority = pkt_dev->skb_priority;
2943
2944 memcpy(eth, pkt_dev->hh, 12);
2945 *(__be16 *) &eth[12] = protocol;
2946
2947 /* Eth + IPh + UDPh + mpls */
2948 datalen = pkt_dev->cur_pkt_size - 14 -
2949 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2950 pkt_dev->pkt_overhead;
2951
2952 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
2953 datalen = sizeof(struct pktgen_hdr);
2954 net_info_ratelimited("increased datalen to %d\n", datalen);
2955 }
2956
2957 udplen = datalen + sizeof(struct udphdr);
2958 udph->source = htons(pkt_dev->cur_udp_src);
2959 udph->dest = htons(pkt_dev->cur_udp_dst);
2960 udph->len = htons(udplen);
2961 udph->check = 0;
2962
2963 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2964
2965 if (pkt_dev->traffic_class) {
2966 /* Version + traffic class + flow (0) */
2967 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2968 }
2969
2970 iph->hop_limit = 32;
2971
2972 iph->payload_len = htons(udplen);
2973 iph->nexthdr = IPPROTO_UDP;
2974
2975 iph->daddr = pkt_dev->cur_in6_daddr;
2976 iph->saddr = pkt_dev->cur_in6_saddr;
2977
2978 skb->protocol = protocol;
2979 skb->dev = odev;
2980 skb->pkt_type = PACKET_HOST;
2981
2982 pktgen_finalize_skb(pkt_dev, skb, datalen);
2983
2984 if (!(pkt_dev->flags & F_UDPCSUM)) {
2985 skb->ip_summed = CHECKSUM_NONE;
2986 } else if (odev->features & NETIF_F_V6_CSUM) {
2987 skb->ip_summed = CHECKSUM_PARTIAL;
2988 skb->csum_start = skb_transport_header(skb) - skb->head;
2989 skb->csum_offset = offsetof(struct udphdr, check);
2990 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0);
2991 } else {
2992 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), udplen, 0);
2993
2994 /* add protocol-dependent pseudo-header */
2995 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum);
2996
2997 if (udph->check == 0)
2998 udph->check = CSUM_MANGLED_0;
2999 }
3000
3001 return skb;
3002 }
3003
3004 static struct sk_buff *fill_packet(struct net_device *odev,
3005 struct pktgen_dev *pkt_dev)
3006 {
3007 if (pkt_dev->flags & F_IPV6)
3008 return fill_packet_ipv6(odev, pkt_dev);
3009 else
3010 return fill_packet_ipv4(odev, pkt_dev);
3011 }
3012
3013 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3014 {
3015 pkt_dev->seq_num = 1;
3016 pkt_dev->idle_acc = 0;
3017 pkt_dev->sofar = 0;
3018 pkt_dev->tx_bytes = 0;
3019 pkt_dev->errors = 0;
3020 }
3021
3022 /* Set up structure for sending pkts, clear counters */
3023
3024 static void pktgen_run(struct pktgen_thread *t)
3025 {
3026 struct pktgen_dev *pkt_dev;
3027 int started = 0;
3028
3029 func_enter();
3030
3031 rcu_read_lock();
3032 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3033
3034 /*
3035 * setup odev and create initial packet.
3036 */
3037 pktgen_setup_inject(pkt_dev);
3038
3039 if (pkt_dev->odev) {
3040 pktgen_clear_counters(pkt_dev);
3041 pkt_dev->skb = NULL;
3042 pkt_dev->started_at = pkt_dev->next_tx = ktime_get();
3043
3044 set_pkt_overhead(pkt_dev);
3045
3046 strcpy(pkt_dev->result, "Starting");
3047 pkt_dev->running = 1; /* Cranke yeself! */
3048 started++;
3049 } else
3050 strcpy(pkt_dev->result, "Error starting");
3051 }
3052 rcu_read_unlock();
3053 if (started)
3054 t->control &= ~(T_STOP);
3055 }
3056
3057 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn)
3058 {
3059 struct pktgen_thread *t;
3060
3061 func_enter();
3062
3063 mutex_lock(&pktgen_thread_lock);
3064
3065 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3066 t->control |= T_STOP;
3067
3068 mutex_unlock(&pktgen_thread_lock);
3069 }
3070
3071 static int thread_is_running(const struct pktgen_thread *t)
3072 {
3073 const struct pktgen_dev *pkt_dev;
3074
3075 rcu_read_lock();
3076 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
3077 if (pkt_dev->running) {
3078 rcu_read_unlock();
3079 return 1;
3080 }
3081 rcu_read_unlock();
3082 return 0;
3083 }
3084
3085 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3086 {
3087 while (thread_is_running(t)) {
3088
3089 msleep_interruptible(100);
3090
3091 if (signal_pending(current))
3092 goto signal;
3093 }
3094 return 1;
3095 signal:
3096 return 0;
3097 }
3098
3099 static int pktgen_wait_all_threads_run(struct pktgen_net *pn)
3100 {
3101 struct pktgen_thread *t;
3102 int sig = 1;
3103
3104 mutex_lock(&pktgen_thread_lock);
3105
3106 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
3107 sig = pktgen_wait_thread_run(t);
3108 if (sig == 0)
3109 break;
3110 }
3111
3112 if (sig == 0)
3113 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3114 t->control |= (T_STOP);
3115
3116 mutex_unlock(&pktgen_thread_lock);
3117 return sig;
3118 }
3119
3120 static void pktgen_run_all_threads(struct pktgen_net *pn)
3121 {
3122 struct pktgen_thread *t;
3123
3124 func_enter();
3125
3126 mutex_lock(&pktgen_thread_lock);
3127
3128 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3129 t->control |= (T_RUN);
3130
3131 mutex_unlock(&pktgen_thread_lock);
3132
3133 /* Propagate thread->control */
3134 schedule_timeout_interruptible(msecs_to_jiffies(125));
3135
3136 pktgen_wait_all_threads_run(pn);
3137 }
3138
3139 static void pktgen_reset_all_threads(struct pktgen_net *pn)
3140 {
3141 struct pktgen_thread *t;
3142
3143 func_enter();
3144
3145 mutex_lock(&pktgen_thread_lock);
3146
3147 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3148 t->control |= (T_REMDEVALL);
3149
3150 mutex_unlock(&pktgen_thread_lock);
3151
3152 /* Propagate thread->control */
3153 schedule_timeout_interruptible(msecs_to_jiffies(125));
3154
3155 pktgen_wait_all_threads_run(pn);
3156 }
3157
3158 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3159 {
3160 __u64 bps, mbps, pps;
3161 char *p = pkt_dev->result;
3162 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3163 pkt_dev->started_at);
3164 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3165
3166 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3167 (unsigned long long)ktime_to_us(elapsed),
3168 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3169 (unsigned long long)ktime_to_us(idle),
3170 (unsigned long long)pkt_dev->sofar,
3171 pkt_dev->cur_pkt_size, nr_frags);
3172
3173 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3174 ktime_to_ns(elapsed));
3175
3176 bps = pps * 8 * pkt_dev->cur_pkt_size;
3177
3178 mbps = bps;
3179 do_div(mbps, 1000000);
3180 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3181 (unsigned long long)pps,
3182 (unsigned long long)mbps,
3183 (unsigned long long)bps,
3184 (unsigned long long)pkt_dev->errors);
3185 }
3186
3187 /* Set stopped-at timer, remove from running list, do counters & statistics */
3188 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3189 {
3190 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3191
3192 if (!pkt_dev->running) {
3193 pr_warn("interface: %s is already stopped\n",
3194 pkt_dev->odevname);
3195 return -EINVAL;
3196 }
3197
3198 pkt_dev->running = 0;
3199 kfree_skb(pkt_dev->skb);
3200 pkt_dev->skb = NULL;
3201 pkt_dev->stopped_at = ktime_get();
3202
3203 show_results(pkt_dev, nr_frags);
3204
3205 return 0;
3206 }
3207
3208 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3209 {
3210 struct pktgen_dev *pkt_dev, *best = NULL;
3211
3212 rcu_read_lock();
3213 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3214 if (!pkt_dev->running)
3215 continue;
3216 if (best == NULL)
3217 best = pkt_dev;
3218 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0)
3219 best = pkt_dev;
3220 }
3221 rcu_read_unlock();
3222
3223 return best;
3224 }
3225
3226 static void pktgen_stop(struct pktgen_thread *t)
3227 {
3228 struct pktgen_dev *pkt_dev;
3229
3230 func_enter();
3231
3232 rcu_read_lock();
3233
3234 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3235 pktgen_stop_device(pkt_dev);
3236 }
3237
3238 rcu_read_unlock();
3239 }
3240
3241 /*
3242 * one of our devices needs to be removed - find it
3243 * and remove it
3244 */
3245 static void pktgen_rem_one_if(struct pktgen_thread *t)
3246 {
3247 struct list_head *q, *n;
3248 struct pktgen_dev *cur;
3249
3250 func_enter();
3251
3252 list_for_each_safe(q, n, &t->if_list) {
3253 cur = list_entry(q, struct pktgen_dev, list);
3254
3255 if (!cur->removal_mark)
3256 continue;
3257
3258 kfree_skb(cur->skb);
3259 cur->skb = NULL;
3260
3261 pktgen_remove_device(t, cur);
3262
3263 break;
3264 }
3265 }
3266
3267 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3268 {
3269 struct list_head *q, *n;
3270 struct pktgen_dev *cur;
3271
3272 func_enter();
3273
3274 /* Remove all devices, free mem */
3275
3276 list_for_each_safe(q, n, &t->if_list) {
3277 cur = list_entry(q, struct pktgen_dev, list);
3278
3279 kfree_skb(cur->skb);
3280 cur->skb = NULL;
3281
3282 pktgen_remove_device(t, cur);
3283 }
3284 }
3285
3286 static void pktgen_rem_thread(struct pktgen_thread *t)
3287 {
3288 /* Remove from the thread list */
3289 remove_proc_entry(t->tsk->comm, t->net->proc_dir);
3290 }
3291
3292 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3293 {
3294 ktime_t idle_start = ktime_get();
3295 schedule();
3296 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3297 }
3298
3299 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3300 {
3301 ktime_t idle_start = ktime_get();
3302
3303 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3304 if (signal_pending(current))
3305 break;
3306
3307 if (need_resched())
3308 pktgen_resched(pkt_dev);
3309 else
3310 cpu_relax();
3311 }
3312 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3313 }
3314
3315 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3316 {
3317 unsigned int burst = ACCESS_ONCE(pkt_dev->burst);
3318 struct net_device *odev = pkt_dev->odev;
3319 struct netdev_queue *txq;
3320 int ret;
3321
3322 /* If device is offline, then don't send */
3323 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3324 pktgen_stop_device(pkt_dev);
3325 return;
3326 }
3327
3328 /* This is max DELAY, this has special meaning of
3329 * "never transmit"
3330 */
3331 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3332 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
3333 return;
3334 }
3335
3336 /* If no skb or clone count exhausted then get new one */
3337 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3338 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3339 /* build a new pkt */
3340 kfree_skb(pkt_dev->skb);
3341
3342 pkt_dev->skb = fill_packet(odev, pkt_dev);
3343 if (pkt_dev->skb == NULL) {
3344 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3345 schedule();
3346 pkt_dev->clone_count--; /* back out increment, OOM */
3347 return;
3348 }
3349 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3350 pkt_dev->allocated_skbs++;
3351 pkt_dev->clone_count = 0; /* reset counter */
3352 }
3353
3354 if (pkt_dev->delay && pkt_dev->last_ok)
3355 spin(pkt_dev, pkt_dev->next_tx);
3356
3357 txq = skb_get_tx_queue(odev, pkt_dev->skb);
3358
3359 local_bh_disable();
3360
3361 HARD_TX_LOCK(odev, txq, smp_processor_id());
3362
3363 if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) {
3364 ret = NETDEV_TX_BUSY;
3365 pkt_dev->last_ok = 0;
3366 goto unlock;
3367 }
3368 atomic_add(burst, &pkt_dev->skb->users);
3369
3370 xmit_more:
3371 ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0);
3372
3373 switch (ret) {
3374 case NETDEV_TX_OK:
3375 pkt_dev->last_ok = 1;
3376 pkt_dev->sofar++;
3377 pkt_dev->seq_num++;
3378 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3379 if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq))
3380 goto xmit_more;
3381 break;
3382 case NET_XMIT_DROP:
3383 case NET_XMIT_CN:
3384 case NET_XMIT_POLICED:
3385 /* skb has been consumed */
3386 pkt_dev->errors++;
3387 break;
3388 default: /* Drivers are not supposed to return other values! */
3389 net_info_ratelimited("%s xmit error: %d\n",
3390 pkt_dev->odevname, ret);
3391 pkt_dev->errors++;
3392 /* fallthru */
3393 case NETDEV_TX_LOCKED:
3394 case NETDEV_TX_BUSY:
3395 /* Retry it next time */
3396 atomic_dec(&(pkt_dev->skb->users));
3397 pkt_dev->last_ok = 0;
3398 }
3399 if (unlikely(burst))
3400 atomic_sub(burst, &pkt_dev->skb->users);
3401 unlock:
3402 HARD_TX_UNLOCK(odev, txq);
3403
3404 local_bh_enable();
3405
3406 /* If pkt_dev->count is zero, then run forever */
3407 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3408 pktgen_wait_for_skb(pkt_dev);
3409
3410 /* Done with this */
3411 pktgen_stop_device(pkt_dev);
3412 }
3413 }
3414
3415 /*
3416 * Main loop of the thread goes here
3417 */
3418
3419 static int pktgen_thread_worker(void *arg)
3420 {
3421 DEFINE_WAIT(wait);
3422 struct pktgen_thread *t = arg;
3423 struct pktgen_dev *pkt_dev = NULL;
3424 int cpu = t->cpu;
3425
3426 BUG_ON(smp_processor_id() != cpu);
3427
3428 init_waitqueue_head(&t->queue);
3429 complete(&t->start_done);
3430
3431 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3432
3433 set_freezable();
3434
3435 __set_current_state(TASK_RUNNING);
3436
3437 while (!kthread_should_stop()) {
3438 pkt_dev = next_to_run(t);
3439
3440 if (unlikely(!pkt_dev && t->control == 0)) {
3441 if (t->net->pktgen_exiting)
3442 break;
3443 wait_event_interruptible_timeout(t->queue,
3444 t->control != 0,
3445 HZ/10);
3446 try_to_freeze();
3447 continue;
3448 }
3449
3450 if (likely(pkt_dev)) {
3451 pktgen_xmit(pkt_dev);
3452
3453 if (need_resched())
3454 pktgen_resched(pkt_dev);
3455 else
3456 cpu_relax();
3457 }
3458
3459 if (t->control & T_STOP) {
3460 pktgen_stop(t);
3461 t->control &= ~(T_STOP);
3462 }
3463
3464 if (t->control & T_RUN) {
3465 pktgen_run(t);
3466 t->control &= ~(T_RUN);
3467 }
3468
3469 if (t->control & T_REMDEVALL) {
3470 pktgen_rem_all_ifs(t);
3471 t->control &= ~(T_REMDEVALL);
3472 }
3473
3474 if (t->control & T_REMDEV) {
3475 pktgen_rem_one_if(t);
3476 t->control &= ~(T_REMDEV);
3477 }
3478
3479 try_to_freeze();
3480 }
3481 set_current_state(TASK_INTERRUPTIBLE);
3482
3483 pr_debug("%s stopping all device\n", t->tsk->comm);
3484 pktgen_stop(t);
3485
3486 pr_debug("%s removing all device\n", t->tsk->comm);
3487 pktgen_rem_all_ifs(t);
3488
3489 pr_debug("%s removing thread\n", t->tsk->comm);
3490 pktgen_rem_thread(t);
3491
3492 /* Wait for kthread_stop */
3493 for (;;) {
3494 set_current_state(TASK_INTERRUPTIBLE);
3495 if (kthread_should_stop())
3496 break;
3497 schedule();
3498 }
3499 __set_current_state(TASK_RUNNING);
3500
3501 return 0;
3502 }
3503
3504 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3505 const char *ifname, bool exact)
3506 {
3507 struct pktgen_dev *p, *pkt_dev = NULL;
3508 size_t len = strlen(ifname);
3509
3510 rcu_read_lock();
3511 list_for_each_entry_rcu(p, &t->if_list, list)
3512 if (strncmp(p->odevname, ifname, len) == 0) {
3513 if (p->odevname[len]) {
3514 if (exact || p->odevname[len] != '@')
3515 continue;
3516 }
3517 pkt_dev = p;
3518 break;
3519 }
3520
3521 rcu_read_unlock();
3522 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3523 return pkt_dev;
3524 }
3525
3526 /*
3527 * Adds a dev at front of if_list.
3528 */
3529
3530 static int add_dev_to_thread(struct pktgen_thread *t,
3531 struct pktgen_dev *pkt_dev)
3532 {
3533 int rv = 0;
3534
3535 /* This function cannot be called concurrently, as its called
3536 * under pktgen_thread_lock mutex, but it can run from
3537 * userspace on another CPU than the kthread. The if_lock()
3538 * is used here to sync with concurrent instances of
3539 * _rem_dev_from_if_list() invoked via kthread, which is also
3540 * updating the if_list */
3541 if_lock(t);
3542
3543 if (pkt_dev->pg_thread) {
3544 pr_err("ERROR: already assigned to a thread\n");
3545 rv = -EBUSY;
3546 goto out;
3547 }
3548
3549 pkt_dev->running = 0;
3550 pkt_dev->pg_thread = t;
3551 list_add_rcu(&pkt_dev->list, &t->if_list);
3552
3553 out:
3554 if_unlock(t);
3555 return rv;
3556 }
3557
3558 /* Called under thread lock */
3559
3560 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3561 {
3562 struct pktgen_dev *pkt_dev;
3563 int err;
3564 int node = cpu_to_node(t->cpu);
3565
3566 /* We don't allow a device to be on several threads */
3567
3568 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND);
3569 if (pkt_dev) {
3570 pr_err("ERROR: interface already used\n");
3571 return -EBUSY;
3572 }
3573
3574 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3575 if (!pkt_dev)
3576 return -ENOMEM;
3577
3578 strcpy(pkt_dev->odevname, ifname);
3579 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3580 node);
3581 if (pkt_dev->flows == NULL) {
3582 kfree(pkt_dev);
3583 return -ENOMEM;
3584 }
3585
3586 pkt_dev->removal_mark = 0;
3587 pkt_dev->nfrags = 0;
3588 pkt_dev->delay = pg_delay_d;
3589 pkt_dev->count = pg_count_d;
3590 pkt_dev->sofar = 0;
3591 pkt_dev->udp_src_min = 9; /* sink port */
3592 pkt_dev->udp_src_max = 9;
3593 pkt_dev->udp_dst_min = 9;
3594 pkt_dev->udp_dst_max = 9;
3595 pkt_dev->vlan_p = 0;
3596 pkt_dev->vlan_cfi = 0;
3597 pkt_dev->vlan_id = 0xffff;
3598 pkt_dev->svlan_p = 0;
3599 pkt_dev->svlan_cfi = 0;
3600 pkt_dev->svlan_id = 0xffff;
3601 pkt_dev->burst = 1;
3602 pkt_dev->node = -1;
3603
3604 err = pktgen_setup_dev(t->net, pkt_dev, ifname);
3605 if (err)
3606 goto out1;
3607 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3608 pkt_dev->clone_skb = pg_clone_skb_d;
3609
3610 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir,
3611 &pktgen_if_fops, pkt_dev);
3612 if (!pkt_dev->entry) {
3613 pr_err("cannot create %s/%s procfs entry\n",
3614 PG_PROC_DIR, ifname);
3615 err = -EINVAL;
3616 goto out2;
3617 }
3618 #ifdef CONFIG_XFRM
3619 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3620 pkt_dev->ipsproto = IPPROTO_ESP;
3621
3622 /* xfrm tunnel mode needs additional dst to extract outter
3623 * ip header protocol/ttl/id field, here creat a phony one.
3624 * instead of looking for a valid rt, which definitely hurting
3625 * performance under such circumstance.
3626 */
3627 pkt_dev->dstops.family = AF_INET;
3628 pkt_dev->dst.dev = pkt_dev->odev;
3629 dst_init_metrics(&pkt_dev->dst, pktgen_dst_metrics, false);
3630 pkt_dev->dst.child = &pkt_dev->dst;
3631 pkt_dev->dst.ops = &pkt_dev->dstops;
3632 #endif
3633
3634 return add_dev_to_thread(t, pkt_dev);
3635 out2:
3636 dev_put(pkt_dev->odev);
3637 out1:
3638 #ifdef CONFIG_XFRM
3639 free_SAs(pkt_dev);
3640 #endif
3641 vfree(pkt_dev->flows);
3642 kfree(pkt_dev);
3643 return err;
3644 }
3645
3646 static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
3647 {
3648 struct pktgen_thread *t;
3649 struct proc_dir_entry *pe;
3650 struct task_struct *p;
3651
3652 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3653 cpu_to_node(cpu));
3654 if (!t) {
3655 pr_err("ERROR: out of memory, can't create new thread\n");
3656 return -ENOMEM;
3657 }
3658
3659 spin_lock_init(&t->if_lock);
3660 t->cpu = cpu;
3661
3662 INIT_LIST_HEAD(&t->if_list);
3663
3664 list_add_tail(&t->th_list, &pn->pktgen_threads);
3665 init_completion(&t->start_done);
3666
3667 p = kthread_create_on_node(pktgen_thread_worker,
3668 t,
3669 cpu_to_node(cpu),
3670 "kpktgend_%d", cpu);
3671 if (IS_ERR(p)) {
3672 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3673 list_del(&t->th_list);
3674 kfree(t);
3675 return PTR_ERR(p);
3676 }
3677 kthread_bind(p, cpu);
3678 t->tsk = p;
3679
3680 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
3681 &pktgen_thread_fops, t);
3682 if (!pe) {
3683 pr_err("cannot create %s/%s procfs entry\n",
3684 PG_PROC_DIR, t->tsk->comm);
3685 kthread_stop(p);
3686 list_del(&t->th_list);
3687 kfree(t);
3688 return -EINVAL;
3689 }
3690
3691 t->net = pn;
3692 wake_up_process(p);
3693 wait_for_completion(&t->start_done);
3694
3695 return 0;
3696 }
3697
3698 /*
3699 * Removes a device from the thread if_list.
3700 */
3701 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3702 struct pktgen_dev *pkt_dev)
3703 {
3704 struct list_head *q, *n;
3705 struct pktgen_dev *p;
3706
3707 if_lock(t);
3708 list_for_each_safe(q, n, &t->if_list) {
3709 p = list_entry(q, struct pktgen_dev, list);
3710 if (p == pkt_dev)
3711 list_del_rcu(&p->list);
3712 }
3713 if_unlock(t);
3714 }
3715
3716 static int pktgen_remove_device(struct pktgen_thread *t,
3717 struct pktgen_dev *pkt_dev)
3718 {
3719 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3720
3721 if (pkt_dev->running) {
3722 pr_warn("WARNING: trying to remove a running interface, stopping it now\n");
3723 pktgen_stop_device(pkt_dev);
3724 }
3725
3726 /* Dis-associate from the interface */
3727
3728 if (pkt_dev->odev) {
3729 dev_put(pkt_dev->odev);
3730 pkt_dev->odev = NULL;
3731 }
3732
3733 /* Remove proc before if_list entry, because add_device uses
3734 * list to determine if interface already exist, avoid race
3735 * with proc_create_data() */
3736 proc_remove(pkt_dev->entry);
3737
3738 /* And update the thread if_list */
3739 _rem_dev_from_if_list(t, pkt_dev);
3740
3741 #ifdef CONFIG_XFRM
3742 free_SAs(pkt_dev);
3743 #endif
3744 vfree(pkt_dev->flows);
3745 if (pkt_dev->page)
3746 put_page(pkt_dev->page);
3747 kfree_rcu(pkt_dev, rcu);
3748 return 0;
3749 }
3750
3751 static int __net_init pg_net_init(struct net *net)
3752 {
3753 struct pktgen_net *pn = net_generic(net, pg_net_id);
3754 struct proc_dir_entry *pe;
3755 int cpu, ret = 0;
3756
3757 pn->net = net;
3758 INIT_LIST_HEAD(&pn->pktgen_threads);
3759 pn->pktgen_exiting = false;
3760 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net);
3761 if (!pn->proc_dir) {
3762 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR);
3763 return -ENODEV;
3764 }
3765 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops);
3766 if (pe == NULL) {
3767 pr_err("cannot create %s procfs entry\n", PGCTRL);
3768 ret = -EINVAL;
3769 goto remove;
3770 }
3771
3772 for_each_online_cpu(cpu) {
3773 int err;
3774
3775 err = pktgen_create_thread(cpu, pn);
3776 if (err)
3777 pr_warn("Cannot create thread for cpu %d (%d)\n",
3778 cpu, err);
3779 }
3780
3781 if (list_empty(&pn->pktgen_threads)) {
3782 pr_err("Initialization failed for all threads\n");
3783 ret = -ENODEV;
3784 goto remove_entry;
3785 }
3786
3787 return 0;
3788
3789 remove_entry:
3790 remove_proc_entry(PGCTRL, pn->proc_dir);
3791 remove:
3792 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3793 return ret;
3794 }
3795
3796 static void __net_exit pg_net_exit(struct net *net)
3797 {
3798 struct pktgen_net *pn = net_generic(net, pg_net_id);
3799 struct pktgen_thread *t;
3800 struct list_head *q, *n;
3801 LIST_HEAD(list);
3802
3803 /* Stop all interfaces & threads */
3804 pn->pktgen_exiting = true;
3805
3806 mutex_lock(&pktgen_thread_lock);
3807 list_splice_init(&pn->pktgen_threads, &list);
3808 mutex_unlock(&pktgen_thread_lock);
3809
3810 list_for_each_safe(q, n, &list) {
3811 t = list_entry(q, struct pktgen_thread, th_list);
3812 list_del(&t->th_list);
3813 kthread_stop(t->tsk);
3814 kfree(t);
3815 }
3816
3817 remove_proc_entry(PGCTRL, pn->proc_dir);
3818 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3819 }
3820
3821 static struct pernet_operations pg_net_ops = {
3822 .init = pg_net_init,
3823 .exit = pg_net_exit,
3824 .id = &pg_net_id,
3825 .size = sizeof(struct pktgen_net),
3826 };
3827
3828 static int __init pg_init(void)
3829 {
3830 int ret = 0;
3831
3832 pr_info("%s", version);
3833 ret = register_pernet_subsys(&pg_net_ops);
3834 if (ret)
3835 return ret;
3836 ret = register_netdevice_notifier(&pktgen_notifier_block);
3837 if (ret)
3838 unregister_pernet_subsys(&pg_net_ops);
3839
3840 return ret;
3841 }
3842
3843 static void __exit pg_cleanup(void)
3844 {
3845 unregister_netdevice_notifier(&pktgen_notifier_block);
3846 unregister_pernet_subsys(&pg_net_ops);
3847 /* Don't need rcu_barrier() due to use of kfree_rcu() */
3848 }
3849
3850 module_init(pg_init);
3851 module_exit(pg_cleanup);
3852
3853 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3854 MODULE_DESCRIPTION("Packet Generator tool");
3855 MODULE_LICENSE("GPL");
3856 MODULE_VERSION(VERSION);
3857 module_param(pg_count_d, int, 0);
3858 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3859 module_param(pg_delay_d, int, 0);
3860 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3861 module_param(pg_clone_skb_d, int, 0);
3862 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3863 module_param(debug, int, 0);
3864 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
Linux with added FPC-III support