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Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu
[mirror_ubuntu-artful-kernel.git] / net / core / pktgen.c
1 /*
2 * Authors:
3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
4 * Uppsala University and
5 * Swedish University of Agricultural Sciences
6 *
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 * Ben Greear <greearb@candelatech.com>
9 * Jens Låås <jens.laas@data.slu.se>
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 *
16 *
17 * A tool for loading the network with preconfigurated packets.
18 * The tool is implemented as a linux module. Parameters are output
19 * device, delay (to hard_xmit), number of packets, and whether
20 * to use multiple SKBs or just the same one.
21 * pktgen uses the installed interface's output routine.
22 *
23 * Additional hacking by:
24 *
25 * Jens.Laas@data.slu.se
26 * Improved by ANK. 010120.
27 * Improved by ANK even more. 010212.
28 * MAC address typo fixed. 010417 --ro
29 * Integrated. 020301 --DaveM
30 * Added multiskb option 020301 --DaveM
31 * Scaling of results. 020417--sigurdur@linpro.no
32 * Significant re-work of the module:
33 * * Convert to threaded model to more efficiently be able to transmit
34 * and receive on multiple interfaces at once.
35 * * Converted many counters to __u64 to allow longer runs.
36 * * Allow configuration of ranges, like min/max IP address, MACs,
37 * and UDP-ports, for both source and destination, and can
38 * set to use a random distribution or sequentially walk the range.
39 * * Can now change most values after starting.
40 * * Place 12-byte packet in UDP payload with magic number,
41 * sequence number, and timestamp.
42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and
43 * latencies (with micro-second) precision.
44 * * Add IOCTL interface to easily get counters & configuration.
45 * --Ben Greear <greearb@candelatech.com>
46 *
47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
49 * as a "fastpath" with a configurable number of clones after alloc's.
50 * clone_skb=0 means all packets are allocated this also means ranges time
51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
52 * clones.
53 *
54 * Also moved to /proc/net/pktgen/
55 * --ro
56 *
57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
58 * mistakes. Also merged in DaveM's patch in the -pre6 patch.
59 * --Ben Greear <greearb@candelatech.com>
60 *
61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
62 *
63 *
64 * 021124 Finished major redesign and rewrite for new functionality.
65 * See Documentation/networking/pktgen.txt for how to use this.
66 *
67 * The new operation:
68 * For each CPU one thread/process is created at start. This process checks
69 * for running devices in the if_list and sends packets until count is 0 it
70 * also the thread checks the thread->control which is used for inter-process
71 * communication. controlling process "posts" operations to the threads this
72 * way.
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 waring
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 pkt_dev->burst = value < 1 ? 1 : value;
1138 sprintf(pg_result, "OK: burst=%d", pkt_dev->burst);
1139 return count;
1140 }
1141 if (!strcmp(name, "node")) {
1142 len = num_arg(&user_buffer[i], 10, &value);
1143 if (len < 0)
1144 return len;
1145
1146 i += len;
1147
1148 if (node_possible(value)) {
1149 pkt_dev->node = value;
1150 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1151 if (pkt_dev->page) {
1152 put_page(pkt_dev->page);
1153 pkt_dev->page = NULL;
1154 }
1155 }
1156 else
1157 sprintf(pg_result, "ERROR: node not possible");
1158 return count;
1159 }
1160 if (!strcmp(name, "flag")) {
1161 char f[32];
1162 memset(f, 0, 32);
1163 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1164 if (len < 0)
1165 return len;
1166
1167 if (copy_from_user(f, &user_buffer[i], len))
1168 return -EFAULT;
1169 i += len;
1170 if (strcmp(f, "IPSRC_RND") == 0)
1171 pkt_dev->flags |= F_IPSRC_RND;
1172
1173 else if (strcmp(f, "!IPSRC_RND") == 0)
1174 pkt_dev->flags &= ~F_IPSRC_RND;
1175
1176 else if (strcmp(f, "TXSIZE_RND") == 0)
1177 pkt_dev->flags |= F_TXSIZE_RND;
1178
1179 else if (strcmp(f, "!TXSIZE_RND") == 0)
1180 pkt_dev->flags &= ~F_TXSIZE_RND;
1181
1182 else if (strcmp(f, "IPDST_RND") == 0)
1183 pkt_dev->flags |= F_IPDST_RND;
1184
1185 else if (strcmp(f, "!IPDST_RND") == 0)
1186 pkt_dev->flags &= ~F_IPDST_RND;
1187
1188 else if (strcmp(f, "UDPSRC_RND") == 0)
1189 pkt_dev->flags |= F_UDPSRC_RND;
1190
1191 else if (strcmp(f, "!UDPSRC_RND") == 0)
1192 pkt_dev->flags &= ~F_UDPSRC_RND;
1193
1194 else if (strcmp(f, "UDPDST_RND") == 0)
1195 pkt_dev->flags |= F_UDPDST_RND;
1196
1197 else if (strcmp(f, "!UDPDST_RND") == 0)
1198 pkt_dev->flags &= ~F_UDPDST_RND;
1199
1200 else if (strcmp(f, "MACSRC_RND") == 0)
1201 pkt_dev->flags |= F_MACSRC_RND;
1202
1203 else if (strcmp(f, "!MACSRC_RND") == 0)
1204 pkt_dev->flags &= ~F_MACSRC_RND;
1205
1206 else if (strcmp(f, "MACDST_RND") == 0)
1207 pkt_dev->flags |= F_MACDST_RND;
1208
1209 else if (strcmp(f, "!MACDST_RND") == 0)
1210 pkt_dev->flags &= ~F_MACDST_RND;
1211
1212 else if (strcmp(f, "MPLS_RND") == 0)
1213 pkt_dev->flags |= F_MPLS_RND;
1214
1215 else if (strcmp(f, "!MPLS_RND") == 0)
1216 pkt_dev->flags &= ~F_MPLS_RND;
1217
1218 else if (strcmp(f, "VID_RND") == 0)
1219 pkt_dev->flags |= F_VID_RND;
1220
1221 else if (strcmp(f, "!VID_RND") == 0)
1222 pkt_dev->flags &= ~F_VID_RND;
1223
1224 else if (strcmp(f, "SVID_RND") == 0)
1225 pkt_dev->flags |= F_SVID_RND;
1226
1227 else if (strcmp(f, "!SVID_RND") == 0)
1228 pkt_dev->flags &= ~F_SVID_RND;
1229
1230 else if (strcmp(f, "FLOW_SEQ") == 0)
1231 pkt_dev->flags |= F_FLOW_SEQ;
1232
1233 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1234 pkt_dev->flags |= F_QUEUE_MAP_RND;
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_CPU") == 0)
1240 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1241
1242 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1243 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1244 #ifdef CONFIG_XFRM
1245 else if (strcmp(f, "IPSEC") == 0)
1246 pkt_dev->flags |= F_IPSEC_ON;
1247 #endif
1248
1249 else if (strcmp(f, "!IPV6") == 0)
1250 pkt_dev->flags &= ~F_IPV6;
1251
1252 else if (strcmp(f, "NODE_ALLOC") == 0)
1253 pkt_dev->flags |= F_NODE;
1254
1255 else if (strcmp(f, "!NODE_ALLOC") == 0)
1256 pkt_dev->flags &= ~F_NODE;
1257
1258 else if (strcmp(f, "UDPCSUM") == 0)
1259 pkt_dev->flags |= F_UDPCSUM;
1260
1261 else if (strcmp(f, "!UDPCSUM") == 0)
1262 pkt_dev->flags &= ~F_UDPCSUM;
1263
1264 else if (strcmp(f, "NO_TIMESTAMP") == 0)
1265 pkt_dev->flags |= F_NO_TIMESTAMP;
1266
1267 else {
1268 sprintf(pg_result,
1269 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1270 f,
1271 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1272 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, "
1273 "MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, "
1274 "QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, "
1275 "NO_TIMESTAMP, "
1276 #ifdef CONFIG_XFRM
1277 "IPSEC, "
1278 #endif
1279 "NODE_ALLOC\n");
1280 return count;
1281 }
1282 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1283 return count;
1284 }
1285 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1286 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1287 if (len < 0)
1288 return len;
1289
1290 if (copy_from_user(buf, &user_buffer[i], len))
1291 return -EFAULT;
1292 buf[len] = 0;
1293 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1294 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1295 strncpy(pkt_dev->dst_min, buf, len);
1296 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1297 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1298 }
1299 if (debug)
1300 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
1301 i += len;
1302 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1303 return count;
1304 }
1305 if (!strcmp(name, "dst_max")) {
1306 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1307 if (len < 0)
1308 return len;
1309
1310
1311 if (copy_from_user(buf, &user_buffer[i], len))
1312 return -EFAULT;
1313
1314 buf[len] = 0;
1315 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1316 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1317 strncpy(pkt_dev->dst_max, buf, len);
1318 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1319 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1320 }
1321 if (debug)
1322 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
1323 i += len;
1324 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1325 return count;
1326 }
1327 if (!strcmp(name, "dst6")) {
1328 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1329 if (len < 0)
1330 return len;
1331
1332 pkt_dev->flags |= F_IPV6;
1333
1334 if (copy_from_user(buf, &user_buffer[i], len))
1335 return -EFAULT;
1336 buf[len] = 0;
1337
1338 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
1339 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1340
1341 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1342
1343 if (debug)
1344 pr_debug("dst6 set to: %s\n", buf);
1345
1346 i += len;
1347 sprintf(pg_result, "OK: dst6=%s", buf);
1348 return count;
1349 }
1350 if (!strcmp(name, "dst6_min")) {
1351 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1352 if (len < 0)
1353 return len;
1354
1355 pkt_dev->flags |= F_IPV6;
1356
1357 if (copy_from_user(buf, &user_buffer[i], len))
1358 return -EFAULT;
1359 buf[len] = 0;
1360
1361 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
1362 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1363
1364 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
1365 if (debug)
1366 pr_debug("dst6_min set to: %s\n", buf);
1367
1368 i += len;
1369 sprintf(pg_result, "OK: dst6_min=%s", buf);
1370 return count;
1371 }
1372 if (!strcmp(name, "dst6_max")) {
1373 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1374 if (len < 0)
1375 return len;
1376
1377 pkt_dev->flags |= F_IPV6;
1378
1379 if (copy_from_user(buf, &user_buffer[i], len))
1380 return -EFAULT;
1381 buf[len] = 0;
1382
1383 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
1384 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1385
1386 if (debug)
1387 pr_debug("dst6_max set to: %s\n", buf);
1388
1389 i += len;
1390 sprintf(pg_result, "OK: dst6_max=%s", buf);
1391 return count;
1392 }
1393 if (!strcmp(name, "src6")) {
1394 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1395 if (len < 0)
1396 return len;
1397
1398 pkt_dev->flags |= F_IPV6;
1399
1400 if (copy_from_user(buf, &user_buffer[i], len))
1401 return -EFAULT;
1402 buf[len] = 0;
1403
1404 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
1405 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1406
1407 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1408
1409 if (debug)
1410 pr_debug("src6 set to: %s\n", buf);
1411
1412 i += len;
1413 sprintf(pg_result, "OK: src6=%s", buf);
1414 return count;
1415 }
1416 if (!strcmp(name, "src_min")) {
1417 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1418 if (len < 0)
1419 return len;
1420
1421 if (copy_from_user(buf, &user_buffer[i], len))
1422 return -EFAULT;
1423 buf[len] = 0;
1424 if (strcmp(buf, pkt_dev->src_min) != 0) {
1425 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1426 strncpy(pkt_dev->src_min, buf, len);
1427 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1428 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1429 }
1430 if (debug)
1431 pr_debug("src_min set to: %s\n", pkt_dev->src_min);
1432 i += len;
1433 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1434 return count;
1435 }
1436 if (!strcmp(name, "src_max")) {
1437 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1438 if (len < 0)
1439 return len;
1440
1441 if (copy_from_user(buf, &user_buffer[i], len))
1442 return -EFAULT;
1443 buf[len] = 0;
1444 if (strcmp(buf, pkt_dev->src_max) != 0) {
1445 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1446 strncpy(pkt_dev->src_max, buf, len);
1447 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1448 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1449 }
1450 if (debug)
1451 pr_debug("src_max set to: %s\n", pkt_dev->src_max);
1452 i += len;
1453 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1454 return count;
1455 }
1456 if (!strcmp(name, "dst_mac")) {
1457 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1458 if (len < 0)
1459 return len;
1460
1461 memset(valstr, 0, sizeof(valstr));
1462 if (copy_from_user(valstr, &user_buffer[i], len))
1463 return -EFAULT;
1464
1465 if (!mac_pton(valstr, pkt_dev->dst_mac))
1466 return -EINVAL;
1467 /* Set up Dest MAC */
1468 ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac);
1469
1470 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1471 return count;
1472 }
1473 if (!strcmp(name, "src_mac")) {
1474 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1475 if (len < 0)
1476 return len;
1477
1478 memset(valstr, 0, sizeof(valstr));
1479 if (copy_from_user(valstr, &user_buffer[i], len))
1480 return -EFAULT;
1481
1482 if (!mac_pton(valstr, pkt_dev->src_mac))
1483 return -EINVAL;
1484 /* Set up Src MAC */
1485 ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac);
1486
1487 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1488 return count;
1489 }
1490
1491 if (!strcmp(name, "clear_counters")) {
1492 pktgen_clear_counters(pkt_dev);
1493 sprintf(pg_result, "OK: Clearing counters.\n");
1494 return count;
1495 }
1496
1497 if (!strcmp(name, "flows")) {
1498 len = num_arg(&user_buffer[i], 10, &value);
1499 if (len < 0)
1500 return len;
1501
1502 i += len;
1503 if (value > MAX_CFLOWS)
1504 value = MAX_CFLOWS;
1505
1506 pkt_dev->cflows = value;
1507 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1508 return count;
1509 }
1510 #ifdef CONFIG_XFRM
1511 if (!strcmp(name, "spi")) {
1512 len = num_arg(&user_buffer[i], 10, &value);
1513 if (len < 0)
1514 return len;
1515
1516 i += len;
1517 pkt_dev->spi = value;
1518 sprintf(pg_result, "OK: spi=%u", pkt_dev->spi);
1519 return count;
1520 }
1521 #endif
1522 if (!strcmp(name, "flowlen")) {
1523 len = num_arg(&user_buffer[i], 10, &value);
1524 if (len < 0)
1525 return len;
1526
1527 i += len;
1528 pkt_dev->lflow = value;
1529 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1530 return count;
1531 }
1532
1533 if (!strcmp(name, "queue_map_min")) {
1534 len = num_arg(&user_buffer[i], 5, &value);
1535 if (len < 0)
1536 return len;
1537
1538 i += len;
1539 pkt_dev->queue_map_min = value;
1540 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1541 return count;
1542 }
1543
1544 if (!strcmp(name, "queue_map_max")) {
1545 len = num_arg(&user_buffer[i], 5, &value);
1546 if (len < 0)
1547 return len;
1548
1549 i += len;
1550 pkt_dev->queue_map_max = value;
1551 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1552 return count;
1553 }
1554
1555 if (!strcmp(name, "mpls")) {
1556 unsigned int n, cnt;
1557
1558 len = get_labels(&user_buffer[i], pkt_dev);
1559 if (len < 0)
1560 return len;
1561 i += len;
1562 cnt = sprintf(pg_result, "OK: mpls=");
1563 for (n = 0; n < pkt_dev->nr_labels; n++)
1564 cnt += sprintf(pg_result + cnt,
1565 "%08x%s", ntohl(pkt_dev->labels[n]),
1566 n == pkt_dev->nr_labels-1 ? "" : ",");
1567
1568 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1569 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1570 pkt_dev->svlan_id = 0xffff;
1571
1572 if (debug)
1573 pr_debug("VLAN/SVLAN auto turned off\n");
1574 }
1575 return count;
1576 }
1577
1578 if (!strcmp(name, "vlan_id")) {
1579 len = num_arg(&user_buffer[i], 4, &value);
1580 if (len < 0)
1581 return len;
1582
1583 i += len;
1584 if (value <= 4095) {
1585 pkt_dev->vlan_id = value; /* turn on VLAN */
1586
1587 if (debug)
1588 pr_debug("VLAN turned on\n");
1589
1590 if (debug && pkt_dev->nr_labels)
1591 pr_debug("MPLS auto turned off\n");
1592
1593 pkt_dev->nr_labels = 0; /* turn off MPLS */
1594 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1595 } else {
1596 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1597 pkt_dev->svlan_id = 0xffff;
1598
1599 if (debug)
1600 pr_debug("VLAN/SVLAN turned off\n");
1601 }
1602 return count;
1603 }
1604
1605 if (!strcmp(name, "vlan_p")) {
1606 len = num_arg(&user_buffer[i], 1, &value);
1607 if (len < 0)
1608 return len;
1609
1610 i += len;
1611 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1612 pkt_dev->vlan_p = value;
1613 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1614 } else {
1615 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1616 }
1617 return count;
1618 }
1619
1620 if (!strcmp(name, "vlan_cfi")) {
1621 len = num_arg(&user_buffer[i], 1, &value);
1622 if (len < 0)
1623 return len;
1624
1625 i += len;
1626 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1627 pkt_dev->vlan_cfi = value;
1628 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1629 } else {
1630 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1631 }
1632 return count;
1633 }
1634
1635 if (!strcmp(name, "svlan_id")) {
1636 len = num_arg(&user_buffer[i], 4, &value);
1637 if (len < 0)
1638 return len;
1639
1640 i += len;
1641 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1642 pkt_dev->svlan_id = value; /* turn on SVLAN */
1643
1644 if (debug)
1645 pr_debug("SVLAN turned on\n");
1646
1647 if (debug && pkt_dev->nr_labels)
1648 pr_debug("MPLS auto turned off\n");
1649
1650 pkt_dev->nr_labels = 0; /* turn off MPLS */
1651 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1652 } else {
1653 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1654 pkt_dev->svlan_id = 0xffff;
1655
1656 if (debug)
1657 pr_debug("VLAN/SVLAN turned off\n");
1658 }
1659 return count;
1660 }
1661
1662 if (!strcmp(name, "svlan_p")) {
1663 len = num_arg(&user_buffer[i], 1, &value);
1664 if (len < 0)
1665 return len;
1666
1667 i += len;
1668 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1669 pkt_dev->svlan_p = value;
1670 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1671 } else {
1672 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1673 }
1674 return count;
1675 }
1676
1677 if (!strcmp(name, "svlan_cfi")) {
1678 len = num_arg(&user_buffer[i], 1, &value);
1679 if (len < 0)
1680 return len;
1681
1682 i += len;
1683 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1684 pkt_dev->svlan_cfi = value;
1685 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1686 } else {
1687 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1688 }
1689 return count;
1690 }
1691
1692 if (!strcmp(name, "tos")) {
1693 __u32 tmp_value = 0;
1694 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1695 if (len < 0)
1696 return len;
1697
1698 i += len;
1699 if (len == 2) {
1700 pkt_dev->tos = tmp_value;
1701 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1702 } else {
1703 sprintf(pg_result, "ERROR: tos must be 00-ff");
1704 }
1705 return count;
1706 }
1707
1708 if (!strcmp(name, "traffic_class")) {
1709 __u32 tmp_value = 0;
1710 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1711 if (len < 0)
1712 return len;
1713
1714 i += len;
1715 if (len == 2) {
1716 pkt_dev->traffic_class = tmp_value;
1717 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1718 } else {
1719 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1720 }
1721 return count;
1722 }
1723
1724 if (!strcmp(name, "skb_priority")) {
1725 len = num_arg(&user_buffer[i], 9, &value);
1726 if (len < 0)
1727 return len;
1728
1729 i += len;
1730 pkt_dev->skb_priority = value;
1731 sprintf(pg_result, "OK: skb_priority=%i",
1732 pkt_dev->skb_priority);
1733 return count;
1734 }
1735
1736 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1737 return -EINVAL;
1738 }
1739
1740 static int pktgen_if_open(struct inode *inode, struct file *file)
1741 {
1742 return single_open(file, pktgen_if_show, PDE_DATA(inode));
1743 }
1744
1745 static const struct file_operations pktgen_if_fops = {
1746 .owner = THIS_MODULE,
1747 .open = pktgen_if_open,
1748 .read = seq_read,
1749 .llseek = seq_lseek,
1750 .write = pktgen_if_write,
1751 .release = single_release,
1752 };
1753
1754 static int pktgen_thread_show(struct seq_file *seq, void *v)
1755 {
1756 struct pktgen_thread *t = seq->private;
1757 const struct pktgen_dev *pkt_dev;
1758
1759 BUG_ON(!t);
1760
1761 seq_puts(seq, "Running: ");
1762
1763 rcu_read_lock();
1764 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1765 if (pkt_dev->running)
1766 seq_printf(seq, "%s ", pkt_dev->odevname);
1767
1768 seq_puts(seq, "\nStopped: ");
1769
1770 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1771 if (!pkt_dev->running)
1772 seq_printf(seq, "%s ", pkt_dev->odevname);
1773
1774 if (t->result[0])
1775 seq_printf(seq, "\nResult: %s\n", t->result);
1776 else
1777 seq_puts(seq, "\nResult: NA\n");
1778
1779 rcu_read_unlock();
1780
1781 return 0;
1782 }
1783
1784 static ssize_t pktgen_thread_write(struct file *file,
1785 const char __user * user_buffer,
1786 size_t count, loff_t * offset)
1787 {
1788 struct seq_file *seq = file->private_data;
1789 struct pktgen_thread *t = seq->private;
1790 int i, max, len, ret;
1791 char name[40];
1792 char *pg_result;
1793
1794 if (count < 1) {
1795 // sprintf(pg_result, "Wrong command format");
1796 return -EINVAL;
1797 }
1798
1799 max = count;
1800 len = count_trail_chars(user_buffer, max);
1801 if (len < 0)
1802 return len;
1803
1804 i = len;
1805
1806 /* Read variable name */
1807
1808 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1809 if (len < 0)
1810 return len;
1811
1812 memset(name, 0, sizeof(name));
1813 if (copy_from_user(name, &user_buffer[i], len))
1814 return -EFAULT;
1815 i += len;
1816
1817 max = count - i;
1818 len = count_trail_chars(&user_buffer[i], max);
1819 if (len < 0)
1820 return len;
1821
1822 i += len;
1823
1824 if (debug)
1825 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
1826
1827 if (!t) {
1828 pr_err("ERROR: No thread\n");
1829 ret = -EINVAL;
1830 goto out;
1831 }
1832
1833 pg_result = &(t->result[0]);
1834
1835 if (!strcmp(name, "add_device")) {
1836 char f[32];
1837 memset(f, 0, 32);
1838 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1839 if (len < 0) {
1840 ret = len;
1841 goto out;
1842 }
1843 if (copy_from_user(f, &user_buffer[i], len))
1844 return -EFAULT;
1845 i += len;
1846 mutex_lock(&pktgen_thread_lock);
1847 ret = pktgen_add_device(t, f);
1848 mutex_unlock(&pktgen_thread_lock);
1849 if (!ret) {
1850 ret = count;
1851 sprintf(pg_result, "OK: add_device=%s", f);
1852 } else
1853 sprintf(pg_result, "ERROR: can not add device %s", f);
1854 goto out;
1855 }
1856
1857 if (!strcmp(name, "rem_device_all")) {
1858 mutex_lock(&pktgen_thread_lock);
1859 t->control |= T_REMDEVALL;
1860 mutex_unlock(&pktgen_thread_lock);
1861 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1862 ret = count;
1863 sprintf(pg_result, "OK: rem_device_all");
1864 goto out;
1865 }
1866
1867 if (!strcmp(name, "max_before_softirq")) {
1868 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1869 ret = count;
1870 goto out;
1871 }
1872
1873 ret = -EINVAL;
1874 out:
1875 return ret;
1876 }
1877
1878 static int pktgen_thread_open(struct inode *inode, struct file *file)
1879 {
1880 return single_open(file, pktgen_thread_show, PDE_DATA(inode));
1881 }
1882
1883 static const struct file_operations pktgen_thread_fops = {
1884 .owner = THIS_MODULE,
1885 .open = pktgen_thread_open,
1886 .read = seq_read,
1887 .llseek = seq_lseek,
1888 .write = pktgen_thread_write,
1889 .release = single_release,
1890 };
1891
1892 /* Think find or remove for NN */
1893 static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn,
1894 const char *ifname, int remove)
1895 {
1896 struct pktgen_thread *t;
1897 struct pktgen_dev *pkt_dev = NULL;
1898 bool exact = (remove == FIND);
1899
1900 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1901 pkt_dev = pktgen_find_dev(t, ifname, exact);
1902 if (pkt_dev) {
1903 if (remove) {
1904 pkt_dev->removal_mark = 1;
1905 t->control |= T_REMDEV;
1906 }
1907 break;
1908 }
1909 }
1910 return pkt_dev;
1911 }
1912
1913 /*
1914 * mark a device for removal
1915 */
1916 static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname)
1917 {
1918 struct pktgen_dev *pkt_dev = NULL;
1919 const int max_tries = 10, msec_per_try = 125;
1920 int i = 0;
1921
1922 mutex_lock(&pktgen_thread_lock);
1923 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1924
1925 while (1) {
1926
1927 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE);
1928 if (pkt_dev == NULL)
1929 break; /* success */
1930
1931 mutex_unlock(&pktgen_thread_lock);
1932 pr_debug("%s: waiting for %s to disappear....\n",
1933 __func__, ifname);
1934 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1935 mutex_lock(&pktgen_thread_lock);
1936
1937 if (++i >= max_tries) {
1938 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1939 __func__, msec_per_try * i, ifname);
1940 break;
1941 }
1942
1943 }
1944
1945 mutex_unlock(&pktgen_thread_lock);
1946 }
1947
1948 static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev)
1949 {
1950 struct pktgen_thread *t;
1951
1952 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1953 struct pktgen_dev *pkt_dev;
1954
1955 rcu_read_lock();
1956 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
1957 if (pkt_dev->odev != dev)
1958 continue;
1959
1960 proc_remove(pkt_dev->entry);
1961
1962 pkt_dev->entry = proc_create_data(dev->name, 0600,
1963 pn->proc_dir,
1964 &pktgen_if_fops,
1965 pkt_dev);
1966 if (!pkt_dev->entry)
1967 pr_err("can't move proc entry for '%s'\n",
1968 dev->name);
1969 break;
1970 }
1971 rcu_read_unlock();
1972 }
1973 }
1974
1975 static int pktgen_device_event(struct notifier_block *unused,
1976 unsigned long event, void *ptr)
1977 {
1978 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1979 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id);
1980
1981 if (pn->pktgen_exiting)
1982 return NOTIFY_DONE;
1983
1984 /* It is OK that we do not hold the group lock right now,
1985 * as we run under the RTNL lock.
1986 */
1987
1988 switch (event) {
1989 case NETDEV_CHANGENAME:
1990 pktgen_change_name(pn, dev);
1991 break;
1992
1993 case NETDEV_UNREGISTER:
1994 pktgen_mark_device(pn, dev->name);
1995 break;
1996 }
1997
1998 return NOTIFY_DONE;
1999 }
2000
2001 static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn,
2002 struct pktgen_dev *pkt_dev,
2003 const char *ifname)
2004 {
2005 char b[IFNAMSIZ+5];
2006 int i;
2007
2008 for (i = 0; ifname[i] != '@'; i++) {
2009 if (i == IFNAMSIZ)
2010 break;
2011
2012 b[i] = ifname[i];
2013 }
2014 b[i] = 0;
2015
2016 return dev_get_by_name(pn->net, b);
2017 }
2018
2019
2020 /* Associate pktgen_dev with a device. */
2021
2022 static int pktgen_setup_dev(const struct pktgen_net *pn,
2023 struct pktgen_dev *pkt_dev, const char *ifname)
2024 {
2025 struct net_device *odev;
2026 int err;
2027
2028 /* Clean old setups */
2029 if (pkt_dev->odev) {
2030 dev_put(pkt_dev->odev);
2031 pkt_dev->odev = NULL;
2032 }
2033
2034 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname);
2035 if (!odev) {
2036 pr_err("no such netdevice: \"%s\"\n", ifname);
2037 return -ENODEV;
2038 }
2039
2040 if (odev->type != ARPHRD_ETHER) {
2041 pr_err("not an ethernet device: \"%s\"\n", ifname);
2042 err = -EINVAL;
2043 } else if (!netif_running(odev)) {
2044 pr_err("device is down: \"%s\"\n", ifname);
2045 err = -ENETDOWN;
2046 } else {
2047 pkt_dev->odev = odev;
2048 return 0;
2049 }
2050
2051 dev_put(odev);
2052 return err;
2053 }
2054
2055 /* Read pkt_dev from the interface and set up internal pktgen_dev
2056 * structure to have the right information to create/send packets
2057 */
2058 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2059 {
2060 int ntxq;
2061
2062 if (!pkt_dev->odev) {
2063 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2064 sprintf(pkt_dev->result,
2065 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2066 return;
2067 }
2068
2069 /* make sure that we don't pick a non-existing transmit queue */
2070 ntxq = pkt_dev->odev->real_num_tx_queues;
2071
2072 if (ntxq <= pkt_dev->queue_map_min) {
2073 pr_warn("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2074 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2075 pkt_dev->odevname);
2076 pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2077 }
2078 if (pkt_dev->queue_map_max >= ntxq) {
2079 pr_warn("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2080 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2081 pkt_dev->odevname);
2082 pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2083 }
2084
2085 /* Default to the interface's mac if not explicitly set. */
2086
2087 if (is_zero_ether_addr(pkt_dev->src_mac))
2088 ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr);
2089
2090 /* Set up Dest MAC */
2091 ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac);
2092
2093 if (pkt_dev->flags & F_IPV6) {
2094 int i, set = 0, err = 1;
2095 struct inet6_dev *idev;
2096
2097 if (pkt_dev->min_pkt_size == 0) {
2098 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
2099 + sizeof(struct udphdr)
2100 + sizeof(struct pktgen_hdr)
2101 + pkt_dev->pkt_overhead;
2102 }
2103
2104 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2105 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2106 set = 1;
2107 break;
2108 }
2109
2110 if (!set) {
2111
2112 /*
2113 * Use linklevel address if unconfigured.
2114 *
2115 * use ipv6_get_lladdr if/when it's get exported
2116 */
2117
2118 rcu_read_lock();
2119 idev = __in6_dev_get(pkt_dev->odev);
2120 if (idev) {
2121 struct inet6_ifaddr *ifp;
2122
2123 read_lock_bh(&idev->lock);
2124 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2125 if ((ifp->scope & IFA_LINK) &&
2126 !(ifp->flags & IFA_F_TENTATIVE)) {
2127 pkt_dev->cur_in6_saddr = ifp->addr;
2128 err = 0;
2129 break;
2130 }
2131 }
2132 read_unlock_bh(&idev->lock);
2133 }
2134 rcu_read_unlock();
2135 if (err)
2136 pr_err("ERROR: IPv6 link address not available\n");
2137 }
2138 } else {
2139 if (pkt_dev->min_pkt_size == 0) {
2140 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
2141 + sizeof(struct udphdr)
2142 + sizeof(struct pktgen_hdr)
2143 + pkt_dev->pkt_overhead;
2144 }
2145
2146 pkt_dev->saddr_min = 0;
2147 pkt_dev->saddr_max = 0;
2148 if (strlen(pkt_dev->src_min) == 0) {
2149
2150 struct in_device *in_dev;
2151
2152 rcu_read_lock();
2153 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2154 if (in_dev) {
2155 if (in_dev->ifa_list) {
2156 pkt_dev->saddr_min =
2157 in_dev->ifa_list->ifa_address;
2158 pkt_dev->saddr_max = pkt_dev->saddr_min;
2159 }
2160 }
2161 rcu_read_unlock();
2162 } else {
2163 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2164 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2165 }
2166
2167 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2168 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2169 }
2170 /* Initialize current values. */
2171 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2172 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
2173 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
2174
2175 pkt_dev->cur_dst_mac_offset = 0;
2176 pkt_dev->cur_src_mac_offset = 0;
2177 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2178 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2179 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2180 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2181 pkt_dev->nflows = 0;
2182 }
2183
2184
2185 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2186 {
2187 ktime_t start_time, end_time;
2188 s64 remaining;
2189 struct hrtimer_sleeper t;
2190
2191 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2192 hrtimer_set_expires(&t.timer, spin_until);
2193
2194 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2195 if (remaining <= 0) {
2196 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2197 return;
2198 }
2199
2200 start_time = ktime_get();
2201 if (remaining < 100000) {
2202 /* for small delays (<100us), just loop until limit is reached */
2203 do {
2204 end_time = ktime_get();
2205 } while (ktime_compare(end_time, spin_until) < 0);
2206 } else {
2207 /* see do_nanosleep */
2208 hrtimer_init_sleeper(&t, current);
2209 do {
2210 set_current_state(TASK_INTERRUPTIBLE);
2211 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2212 if (!hrtimer_active(&t.timer))
2213 t.task = NULL;
2214
2215 if (likely(t.task))
2216 schedule();
2217
2218 hrtimer_cancel(&t.timer);
2219 } while (t.task && pkt_dev->running && !signal_pending(current));
2220 __set_current_state(TASK_RUNNING);
2221 end_time = ktime_get();
2222 }
2223
2224 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2225 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2226 }
2227
2228 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2229 {
2230 pkt_dev->pkt_overhead = 0;
2231 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2232 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2233 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2234 }
2235
2236 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2237 {
2238 return !!(pkt_dev->flows[flow].flags & F_INIT);
2239 }
2240
2241 static inline int f_pick(struct pktgen_dev *pkt_dev)
2242 {
2243 int flow = pkt_dev->curfl;
2244
2245 if (pkt_dev->flags & F_FLOW_SEQ) {
2246 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2247 /* reset time */
2248 pkt_dev->flows[flow].count = 0;
2249 pkt_dev->flows[flow].flags = 0;
2250 pkt_dev->curfl += 1;
2251 if (pkt_dev->curfl >= pkt_dev->cflows)
2252 pkt_dev->curfl = 0; /*reset */
2253 }
2254 } else {
2255 flow = prandom_u32() % pkt_dev->cflows;
2256 pkt_dev->curfl = flow;
2257
2258 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2259 pkt_dev->flows[flow].count = 0;
2260 pkt_dev->flows[flow].flags = 0;
2261 }
2262 }
2263
2264 return pkt_dev->curfl;
2265 }
2266
2267
2268 #ifdef CONFIG_XFRM
2269 /* If there was already an IPSEC SA, we keep it as is, else
2270 * we go look for it ...
2271 */
2272 #define DUMMY_MARK 0
2273 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2274 {
2275 struct xfrm_state *x = pkt_dev->flows[flow].x;
2276 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
2277 if (!x) {
2278
2279 if (pkt_dev->spi) {
2280 /* We need as quick as possible to find the right SA
2281 * Searching with minimum criteria to archieve this.
2282 */
2283 x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET);
2284 } else {
2285 /* slow path: we dont already have xfrm_state */
2286 x = xfrm_stateonly_find(pn->net, DUMMY_MARK,
2287 (xfrm_address_t *)&pkt_dev->cur_daddr,
2288 (xfrm_address_t *)&pkt_dev->cur_saddr,
2289 AF_INET,
2290 pkt_dev->ipsmode,
2291 pkt_dev->ipsproto, 0);
2292 }
2293 if (x) {
2294 pkt_dev->flows[flow].x = x;
2295 set_pkt_overhead(pkt_dev);
2296 pkt_dev->pkt_overhead += x->props.header_len;
2297 }
2298
2299 }
2300 }
2301 #endif
2302 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2303 {
2304
2305 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2306 pkt_dev->cur_queue_map = smp_processor_id();
2307
2308 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2309 __u16 t;
2310 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2311 t = prandom_u32() %
2312 (pkt_dev->queue_map_max -
2313 pkt_dev->queue_map_min + 1)
2314 + pkt_dev->queue_map_min;
2315 } else {
2316 t = pkt_dev->cur_queue_map + 1;
2317 if (t > pkt_dev->queue_map_max)
2318 t = pkt_dev->queue_map_min;
2319 }
2320 pkt_dev->cur_queue_map = t;
2321 }
2322 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2323 }
2324
2325 /* Increment/randomize headers according to flags and current values
2326 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2327 */
2328 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2329 {
2330 __u32 imn;
2331 __u32 imx;
2332 int flow = 0;
2333
2334 if (pkt_dev->cflows)
2335 flow = f_pick(pkt_dev);
2336
2337 /* Deal with source MAC */
2338 if (pkt_dev->src_mac_count > 1) {
2339 __u32 mc;
2340 __u32 tmp;
2341
2342 if (pkt_dev->flags & F_MACSRC_RND)
2343 mc = prandom_u32() % pkt_dev->src_mac_count;
2344 else {
2345 mc = pkt_dev->cur_src_mac_offset++;
2346 if (pkt_dev->cur_src_mac_offset >=
2347 pkt_dev->src_mac_count)
2348 pkt_dev->cur_src_mac_offset = 0;
2349 }
2350
2351 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2352 pkt_dev->hh[11] = tmp;
2353 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2354 pkt_dev->hh[10] = tmp;
2355 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2356 pkt_dev->hh[9] = tmp;
2357 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2358 pkt_dev->hh[8] = tmp;
2359 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2360 pkt_dev->hh[7] = tmp;
2361 }
2362
2363 /* Deal with Destination MAC */
2364 if (pkt_dev->dst_mac_count > 1) {
2365 __u32 mc;
2366 __u32 tmp;
2367
2368 if (pkt_dev->flags & F_MACDST_RND)
2369 mc = prandom_u32() % pkt_dev->dst_mac_count;
2370
2371 else {
2372 mc = pkt_dev->cur_dst_mac_offset++;
2373 if (pkt_dev->cur_dst_mac_offset >=
2374 pkt_dev->dst_mac_count) {
2375 pkt_dev->cur_dst_mac_offset = 0;
2376 }
2377 }
2378
2379 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2380 pkt_dev->hh[5] = tmp;
2381 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2382 pkt_dev->hh[4] = tmp;
2383 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2384 pkt_dev->hh[3] = tmp;
2385 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2386 pkt_dev->hh[2] = tmp;
2387 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2388 pkt_dev->hh[1] = tmp;
2389 }
2390
2391 if (pkt_dev->flags & F_MPLS_RND) {
2392 unsigned int i;
2393 for (i = 0; i < pkt_dev->nr_labels; i++)
2394 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2395 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2396 ((__force __be32)prandom_u32() &
2397 htonl(0x000fffff));
2398 }
2399
2400 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2401 pkt_dev->vlan_id = prandom_u32() & (4096 - 1);
2402 }
2403
2404 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2405 pkt_dev->svlan_id = prandom_u32() & (4096 - 1);
2406 }
2407
2408 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2409 if (pkt_dev->flags & F_UDPSRC_RND)
2410 pkt_dev->cur_udp_src = prandom_u32() %
2411 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2412 + pkt_dev->udp_src_min;
2413
2414 else {
2415 pkt_dev->cur_udp_src++;
2416 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2417 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2418 }
2419 }
2420
2421 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2422 if (pkt_dev->flags & F_UDPDST_RND) {
2423 pkt_dev->cur_udp_dst = prandom_u32() %
2424 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2425 + pkt_dev->udp_dst_min;
2426 } else {
2427 pkt_dev->cur_udp_dst++;
2428 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2429 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2430 }
2431 }
2432
2433 if (!(pkt_dev->flags & F_IPV6)) {
2434
2435 imn = ntohl(pkt_dev->saddr_min);
2436 imx = ntohl(pkt_dev->saddr_max);
2437 if (imn < imx) {
2438 __u32 t;
2439 if (pkt_dev->flags & F_IPSRC_RND)
2440 t = prandom_u32() % (imx - imn) + imn;
2441 else {
2442 t = ntohl(pkt_dev->cur_saddr);
2443 t++;
2444 if (t > imx)
2445 t = imn;
2446
2447 }
2448 pkt_dev->cur_saddr = htonl(t);
2449 }
2450
2451 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2452 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2453 } else {
2454 imn = ntohl(pkt_dev->daddr_min);
2455 imx = ntohl(pkt_dev->daddr_max);
2456 if (imn < imx) {
2457 __u32 t;
2458 __be32 s;
2459 if (pkt_dev->flags & F_IPDST_RND) {
2460
2461 do {
2462 t = prandom_u32() %
2463 (imx - imn) + imn;
2464 s = htonl(t);
2465 } while (ipv4_is_loopback(s) ||
2466 ipv4_is_multicast(s) ||
2467 ipv4_is_lbcast(s) ||
2468 ipv4_is_zeronet(s) ||
2469 ipv4_is_local_multicast(s));
2470 pkt_dev->cur_daddr = s;
2471 } else {
2472 t = ntohl(pkt_dev->cur_daddr);
2473 t++;
2474 if (t > imx) {
2475 t = imn;
2476 }
2477 pkt_dev->cur_daddr = htonl(t);
2478 }
2479 }
2480 if (pkt_dev->cflows) {
2481 pkt_dev->flows[flow].flags |= F_INIT;
2482 pkt_dev->flows[flow].cur_daddr =
2483 pkt_dev->cur_daddr;
2484 #ifdef CONFIG_XFRM
2485 if (pkt_dev->flags & F_IPSEC_ON)
2486 get_ipsec_sa(pkt_dev, flow);
2487 #endif
2488 pkt_dev->nflows++;
2489 }
2490 }
2491 } else { /* IPV6 * */
2492
2493 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
2494 int i;
2495
2496 /* Only random destinations yet */
2497
2498 for (i = 0; i < 4; i++) {
2499 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2500 (((__force __be32)prandom_u32() |
2501 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2502 pkt_dev->max_in6_daddr.s6_addr32[i]);
2503 }
2504 }
2505 }
2506
2507 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2508 __u32 t;
2509 if (pkt_dev->flags & F_TXSIZE_RND) {
2510 t = prandom_u32() %
2511 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2512 + pkt_dev->min_pkt_size;
2513 } else {
2514 t = pkt_dev->cur_pkt_size + 1;
2515 if (t > pkt_dev->max_pkt_size)
2516 t = pkt_dev->min_pkt_size;
2517 }
2518 pkt_dev->cur_pkt_size = t;
2519 }
2520
2521 set_cur_queue_map(pkt_dev);
2522
2523 pkt_dev->flows[flow].count++;
2524 }
2525
2526
2527 #ifdef CONFIG_XFRM
2528 static u32 pktgen_dst_metrics[RTAX_MAX + 1] = {
2529
2530 [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */
2531 };
2532
2533 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2534 {
2535 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2536 int err = 0;
2537 struct net *net = dev_net(pkt_dev->odev);
2538
2539 if (!x)
2540 return 0;
2541 /* XXX: we dont support tunnel mode for now until
2542 * we resolve the dst issue */
2543 if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0))
2544 return 0;
2545
2546 /* But when user specify an valid SPI, transformation
2547 * supports both transport/tunnel mode + ESP/AH type.
2548 */
2549 if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0))
2550 skb->_skb_refdst = (unsigned long)&pkt_dev->dst | SKB_DST_NOREF;
2551
2552 rcu_read_lock_bh();
2553 err = x->outer_mode->output(x, skb);
2554 rcu_read_unlock_bh();
2555 if (err) {
2556 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR);
2557 goto error;
2558 }
2559 err = x->type->output(x, skb);
2560 if (err) {
2561 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR);
2562 goto error;
2563 }
2564 spin_lock_bh(&x->lock);
2565 x->curlft.bytes += skb->len;
2566 x->curlft.packets++;
2567 spin_unlock_bh(&x->lock);
2568 error:
2569 return err;
2570 }
2571
2572 static void free_SAs(struct pktgen_dev *pkt_dev)
2573 {
2574 if (pkt_dev->cflows) {
2575 /* let go of the SAs if we have them */
2576 int i;
2577 for (i = 0; i < pkt_dev->cflows; i++) {
2578 struct xfrm_state *x = pkt_dev->flows[i].x;
2579 if (x) {
2580 xfrm_state_put(x);
2581 pkt_dev->flows[i].x = NULL;
2582 }
2583 }
2584 }
2585 }
2586
2587 static int process_ipsec(struct pktgen_dev *pkt_dev,
2588 struct sk_buff *skb, __be16 protocol)
2589 {
2590 if (pkt_dev->flags & F_IPSEC_ON) {
2591 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2592 int nhead = 0;
2593 if (x) {
2594 int ret;
2595 __u8 *eth;
2596 struct iphdr *iph;
2597
2598 nhead = x->props.header_len - skb_headroom(skb);
2599 if (nhead > 0) {
2600 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2601 if (ret < 0) {
2602 pr_err("Error expanding ipsec packet %d\n",
2603 ret);
2604 goto err;
2605 }
2606 }
2607
2608 /* ipsec is not expecting ll header */
2609 skb_pull(skb, ETH_HLEN);
2610 ret = pktgen_output_ipsec(skb, pkt_dev);
2611 if (ret) {
2612 pr_err("Error creating ipsec packet %d\n", ret);
2613 goto err;
2614 }
2615 /* restore ll */
2616 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2617 memcpy(eth, pkt_dev->hh, 12);
2618 *(u16 *) &eth[12] = protocol;
2619
2620 /* Update IPv4 header len as well as checksum value */
2621 iph = ip_hdr(skb);
2622 iph->tot_len = htons(skb->len - ETH_HLEN);
2623 ip_send_check(iph);
2624 }
2625 }
2626 return 1;
2627 err:
2628 kfree_skb(skb);
2629 return 0;
2630 }
2631 #endif
2632
2633 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2634 {
2635 unsigned int i;
2636 for (i = 0; i < pkt_dev->nr_labels; i++)
2637 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2638
2639 mpls--;
2640 *mpls |= MPLS_STACK_BOTTOM;
2641 }
2642
2643 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2644 unsigned int prio)
2645 {
2646 return htons(id | (cfi << 12) | (prio << 13));
2647 }
2648
2649 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2650 int datalen)
2651 {
2652 struct timeval timestamp;
2653 struct pktgen_hdr *pgh;
2654
2655 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
2656 datalen -= sizeof(*pgh);
2657
2658 if (pkt_dev->nfrags <= 0) {
2659 memset(skb_put(skb, datalen), 0, datalen);
2660 } else {
2661 int frags = pkt_dev->nfrags;
2662 int i, len;
2663 int frag_len;
2664
2665
2666 if (frags > MAX_SKB_FRAGS)
2667 frags = MAX_SKB_FRAGS;
2668 len = datalen - frags * PAGE_SIZE;
2669 if (len > 0) {
2670 memset(skb_put(skb, len), 0, len);
2671 datalen = frags * PAGE_SIZE;
2672 }
2673
2674 i = 0;
2675 frag_len = (datalen/frags) < PAGE_SIZE ?
2676 (datalen/frags) : PAGE_SIZE;
2677 while (datalen > 0) {
2678 if (unlikely(!pkt_dev->page)) {
2679 int node = numa_node_id();
2680
2681 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2682 node = pkt_dev->node;
2683 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2684 if (!pkt_dev->page)
2685 break;
2686 }
2687 get_page(pkt_dev->page);
2688 skb_frag_set_page(skb, i, pkt_dev->page);
2689 skb_shinfo(skb)->frags[i].page_offset = 0;
2690 /*last fragment, fill rest of data*/
2691 if (i == (frags - 1))
2692 skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2693 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2694 else
2695 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2696 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2697 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2698 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2699 i++;
2700 skb_shinfo(skb)->nr_frags = i;
2701 }
2702 }
2703
2704 /* Stamp the time, and sequence number,
2705 * convert them to network byte order
2706 */
2707 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2708 pgh->seq_num = htonl(pkt_dev->seq_num);
2709
2710 if (pkt_dev->flags & F_NO_TIMESTAMP) {
2711 pgh->tv_sec = 0;
2712 pgh->tv_usec = 0;
2713 } else {
2714 do_gettimeofday(&timestamp);
2715 pgh->tv_sec = htonl(timestamp.tv_sec);
2716 pgh->tv_usec = htonl(timestamp.tv_usec);
2717 }
2718 }
2719
2720 static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
2721 struct pktgen_dev *pkt_dev,
2722 unsigned int extralen)
2723 {
2724 struct sk_buff *skb = NULL;
2725 unsigned int size = pkt_dev->cur_pkt_size + 64 + extralen +
2726 pkt_dev->pkt_overhead;
2727
2728 if (pkt_dev->flags & F_NODE) {
2729 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id();
2730
2731 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node);
2732 if (likely(skb)) {
2733 skb_reserve(skb, NET_SKB_PAD);
2734 skb->dev = dev;
2735 }
2736 } else {
2737 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
2738 }
2739
2740 return skb;
2741 }
2742
2743 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2744 struct pktgen_dev *pkt_dev)
2745 {
2746 struct sk_buff *skb = NULL;
2747 __u8 *eth;
2748 struct udphdr *udph;
2749 int datalen, iplen;
2750 struct iphdr *iph;
2751 __be16 protocol = htons(ETH_P_IP);
2752 __be32 *mpls;
2753 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2754 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2755 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2756 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2757 u16 queue_map;
2758
2759 if (pkt_dev->nr_labels)
2760 protocol = htons(ETH_P_MPLS_UC);
2761
2762 if (pkt_dev->vlan_id != 0xffff)
2763 protocol = htons(ETH_P_8021Q);
2764
2765 /* Update any of the values, used when we're incrementing various
2766 * fields.
2767 */
2768 mod_cur_headers(pkt_dev);
2769 queue_map = pkt_dev->cur_queue_map;
2770
2771 datalen = (odev->hard_header_len + 16) & ~0xf;
2772
2773 skb = pktgen_alloc_skb(odev, pkt_dev, datalen);
2774 if (!skb) {
2775 sprintf(pkt_dev->result, "No memory");
2776 return NULL;
2777 }
2778
2779 prefetchw(skb->data);
2780 skb_reserve(skb, datalen);
2781
2782 /* Reserve for ethernet and IP header */
2783 eth = (__u8 *) skb_push(skb, 14);
2784 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2785 if (pkt_dev->nr_labels)
2786 mpls_push(mpls, pkt_dev);
2787
2788 if (pkt_dev->vlan_id != 0xffff) {
2789 if (pkt_dev->svlan_id != 0xffff) {
2790 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2791 *svlan_tci = build_tci(pkt_dev->svlan_id,
2792 pkt_dev->svlan_cfi,
2793 pkt_dev->svlan_p);
2794 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2795 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2796 }
2797 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2798 *vlan_tci = build_tci(pkt_dev->vlan_id,
2799 pkt_dev->vlan_cfi,
2800 pkt_dev->vlan_p);
2801 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2802 *vlan_encapsulated_proto = htons(ETH_P_IP);
2803 }
2804
2805 skb_set_mac_header(skb, 0);
2806 skb_set_network_header(skb, skb->len);
2807 iph = (struct iphdr *) skb_put(skb, sizeof(struct iphdr));
2808
2809 skb_set_transport_header(skb, skb->len);
2810 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2811 skb_set_queue_mapping(skb, queue_map);
2812 skb->priority = pkt_dev->skb_priority;
2813
2814 memcpy(eth, pkt_dev->hh, 12);
2815 *(__be16 *) & eth[12] = protocol;
2816
2817 /* Eth + IPh + UDPh + mpls */
2818 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2819 pkt_dev->pkt_overhead;
2820 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
2821 datalen = sizeof(struct pktgen_hdr);
2822
2823 udph->source = htons(pkt_dev->cur_udp_src);
2824 udph->dest = htons(pkt_dev->cur_udp_dst);
2825 udph->len = htons(datalen + 8); /* DATA + udphdr */
2826 udph->check = 0;
2827
2828 iph->ihl = 5;
2829 iph->version = 4;
2830 iph->ttl = 32;
2831 iph->tos = pkt_dev->tos;
2832 iph->protocol = IPPROTO_UDP; /* UDP */
2833 iph->saddr = pkt_dev->cur_saddr;
2834 iph->daddr = pkt_dev->cur_daddr;
2835 iph->id = htons(pkt_dev->ip_id);
2836 pkt_dev->ip_id++;
2837 iph->frag_off = 0;
2838 iplen = 20 + 8 + datalen;
2839 iph->tot_len = htons(iplen);
2840 ip_send_check(iph);
2841 skb->protocol = protocol;
2842 skb->dev = odev;
2843 skb->pkt_type = PACKET_HOST;
2844
2845 if (!(pkt_dev->flags & F_UDPCSUM)) {
2846 skb->ip_summed = CHECKSUM_NONE;
2847 } else if (odev->features & NETIF_F_V4_CSUM) {
2848 skb->ip_summed = CHECKSUM_PARTIAL;
2849 skb->csum = 0;
2850 udp4_hwcsum(skb, udph->source, udph->dest);
2851 } else {
2852 __wsum csum = udp_csum(skb);
2853
2854 /* add protocol-dependent pseudo-header */
2855 udph->check = csum_tcpudp_magic(udph->source, udph->dest,
2856 datalen + 8, IPPROTO_UDP, csum);
2857
2858 if (udph->check == 0)
2859 udph->check = CSUM_MANGLED_0;
2860 }
2861
2862 pktgen_finalize_skb(pkt_dev, skb, datalen);
2863
2864 #ifdef CONFIG_XFRM
2865 if (!process_ipsec(pkt_dev, skb, protocol))
2866 return NULL;
2867 #endif
2868
2869 return skb;
2870 }
2871
2872 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2873 struct pktgen_dev *pkt_dev)
2874 {
2875 struct sk_buff *skb = NULL;
2876 __u8 *eth;
2877 struct udphdr *udph;
2878 int datalen, udplen;
2879 struct ipv6hdr *iph;
2880 __be16 protocol = htons(ETH_P_IPV6);
2881 __be32 *mpls;
2882 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2883 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2884 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2885 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2886 u16 queue_map;
2887
2888 if (pkt_dev->nr_labels)
2889 protocol = htons(ETH_P_MPLS_UC);
2890
2891 if (pkt_dev->vlan_id != 0xffff)
2892 protocol = htons(ETH_P_8021Q);
2893
2894 /* Update any of the values, used when we're incrementing various
2895 * fields.
2896 */
2897 mod_cur_headers(pkt_dev);
2898 queue_map = pkt_dev->cur_queue_map;
2899
2900 skb = pktgen_alloc_skb(odev, pkt_dev, 16);
2901 if (!skb) {
2902 sprintf(pkt_dev->result, "No memory");
2903 return NULL;
2904 }
2905
2906 prefetchw(skb->data);
2907 skb_reserve(skb, 16);
2908
2909 /* Reserve for ethernet and IP header */
2910 eth = (__u8 *) skb_push(skb, 14);
2911 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2912 if (pkt_dev->nr_labels)
2913 mpls_push(mpls, pkt_dev);
2914
2915 if (pkt_dev->vlan_id != 0xffff) {
2916 if (pkt_dev->svlan_id != 0xffff) {
2917 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2918 *svlan_tci = build_tci(pkt_dev->svlan_id,
2919 pkt_dev->svlan_cfi,
2920 pkt_dev->svlan_p);
2921 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2922 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2923 }
2924 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2925 *vlan_tci = build_tci(pkt_dev->vlan_id,
2926 pkt_dev->vlan_cfi,
2927 pkt_dev->vlan_p);
2928 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2929 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2930 }
2931
2932 skb_set_mac_header(skb, 0);
2933 skb_set_network_header(skb, skb->len);
2934 iph = (struct ipv6hdr *) skb_put(skb, sizeof(struct ipv6hdr));
2935
2936 skb_set_transport_header(skb, skb->len);
2937 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2938 skb_set_queue_mapping(skb, queue_map);
2939 skb->priority = pkt_dev->skb_priority;
2940
2941 memcpy(eth, pkt_dev->hh, 12);
2942 *(__be16 *) &eth[12] = protocol;
2943
2944 /* Eth + IPh + UDPh + mpls */
2945 datalen = pkt_dev->cur_pkt_size - 14 -
2946 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2947 pkt_dev->pkt_overhead;
2948
2949 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
2950 datalen = sizeof(struct pktgen_hdr);
2951 net_info_ratelimited("increased datalen to %d\n", datalen);
2952 }
2953
2954 udplen = datalen + sizeof(struct udphdr);
2955 udph->source = htons(pkt_dev->cur_udp_src);
2956 udph->dest = htons(pkt_dev->cur_udp_dst);
2957 udph->len = htons(udplen);
2958 udph->check = 0;
2959
2960 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2961
2962 if (pkt_dev->traffic_class) {
2963 /* Version + traffic class + flow (0) */
2964 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2965 }
2966
2967 iph->hop_limit = 32;
2968
2969 iph->payload_len = htons(udplen);
2970 iph->nexthdr = IPPROTO_UDP;
2971
2972 iph->daddr = pkt_dev->cur_in6_daddr;
2973 iph->saddr = pkt_dev->cur_in6_saddr;
2974
2975 skb->protocol = protocol;
2976 skb->dev = odev;
2977 skb->pkt_type = PACKET_HOST;
2978
2979 if (!(pkt_dev->flags & F_UDPCSUM)) {
2980 skb->ip_summed = CHECKSUM_NONE;
2981 } else if (odev->features & NETIF_F_V6_CSUM) {
2982 skb->ip_summed = CHECKSUM_PARTIAL;
2983 skb->csum_start = skb_transport_header(skb) - skb->head;
2984 skb->csum_offset = offsetof(struct udphdr, check);
2985 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0);
2986 } else {
2987 __wsum csum = udp_csum(skb);
2988
2989 /* add protocol-dependent pseudo-header */
2990 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum);
2991
2992 if (udph->check == 0)
2993 udph->check = CSUM_MANGLED_0;
2994 }
2995
2996 pktgen_finalize_skb(pkt_dev, skb, datalen);
2997
2998 return skb;
2999 }
3000
3001 static struct sk_buff *fill_packet(struct net_device *odev,
3002 struct pktgen_dev *pkt_dev)
3003 {
3004 if (pkt_dev->flags & F_IPV6)
3005 return fill_packet_ipv6(odev, pkt_dev);
3006 else
3007 return fill_packet_ipv4(odev, pkt_dev);
3008 }
3009
3010 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3011 {
3012 pkt_dev->seq_num = 1;
3013 pkt_dev->idle_acc = 0;
3014 pkt_dev->sofar = 0;
3015 pkt_dev->tx_bytes = 0;
3016 pkt_dev->errors = 0;
3017 }
3018
3019 /* Set up structure for sending pkts, clear counters */
3020
3021 static void pktgen_run(struct pktgen_thread *t)
3022 {
3023 struct pktgen_dev *pkt_dev;
3024 int started = 0;
3025
3026 func_enter();
3027
3028 rcu_read_lock();
3029 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3030
3031 /*
3032 * setup odev and create initial packet.
3033 */
3034 pktgen_setup_inject(pkt_dev);
3035
3036 if (pkt_dev->odev) {
3037 pktgen_clear_counters(pkt_dev);
3038 pkt_dev->skb = NULL;
3039 pkt_dev->started_at = pkt_dev->next_tx = ktime_get();
3040
3041 set_pkt_overhead(pkt_dev);
3042
3043 strcpy(pkt_dev->result, "Starting");
3044 pkt_dev->running = 1; /* Cranke yeself! */
3045 started++;
3046 } else
3047 strcpy(pkt_dev->result, "Error starting");
3048 }
3049 rcu_read_unlock();
3050 if (started)
3051 t->control &= ~(T_STOP);
3052 }
3053
3054 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn)
3055 {
3056 struct pktgen_thread *t;
3057
3058 func_enter();
3059
3060 mutex_lock(&pktgen_thread_lock);
3061
3062 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3063 t->control |= T_STOP;
3064
3065 mutex_unlock(&pktgen_thread_lock);
3066 }
3067
3068 static int thread_is_running(const struct pktgen_thread *t)
3069 {
3070 const struct pktgen_dev *pkt_dev;
3071
3072 rcu_read_lock();
3073 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
3074 if (pkt_dev->running) {
3075 rcu_read_unlock();
3076 return 1;
3077 }
3078 rcu_read_unlock();
3079 return 0;
3080 }
3081
3082 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3083 {
3084 while (thread_is_running(t)) {
3085
3086 msleep_interruptible(100);
3087
3088 if (signal_pending(current))
3089 goto signal;
3090 }
3091 return 1;
3092 signal:
3093 return 0;
3094 }
3095
3096 static int pktgen_wait_all_threads_run(struct pktgen_net *pn)
3097 {
3098 struct pktgen_thread *t;
3099 int sig = 1;
3100
3101 mutex_lock(&pktgen_thread_lock);
3102
3103 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
3104 sig = pktgen_wait_thread_run(t);
3105 if (sig == 0)
3106 break;
3107 }
3108
3109 if (sig == 0)
3110 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3111 t->control |= (T_STOP);
3112
3113 mutex_unlock(&pktgen_thread_lock);
3114 return sig;
3115 }
3116
3117 static void pktgen_run_all_threads(struct pktgen_net *pn)
3118 {
3119 struct pktgen_thread *t;
3120
3121 func_enter();
3122
3123 mutex_lock(&pktgen_thread_lock);
3124
3125 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3126 t->control |= (T_RUN);
3127
3128 mutex_unlock(&pktgen_thread_lock);
3129
3130 /* Propagate thread->control */
3131 schedule_timeout_interruptible(msecs_to_jiffies(125));
3132
3133 pktgen_wait_all_threads_run(pn);
3134 }
3135
3136 static void pktgen_reset_all_threads(struct pktgen_net *pn)
3137 {
3138 struct pktgen_thread *t;
3139
3140 func_enter();
3141
3142 mutex_lock(&pktgen_thread_lock);
3143
3144 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3145 t->control |= (T_REMDEVALL);
3146
3147 mutex_unlock(&pktgen_thread_lock);
3148
3149 /* Propagate thread->control */
3150 schedule_timeout_interruptible(msecs_to_jiffies(125));
3151
3152 pktgen_wait_all_threads_run(pn);
3153 }
3154
3155 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3156 {
3157 __u64 bps, mbps, pps;
3158 char *p = pkt_dev->result;
3159 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3160 pkt_dev->started_at);
3161 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3162
3163 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3164 (unsigned long long)ktime_to_us(elapsed),
3165 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3166 (unsigned long long)ktime_to_us(idle),
3167 (unsigned long long)pkt_dev->sofar,
3168 pkt_dev->cur_pkt_size, nr_frags);
3169
3170 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3171 ktime_to_ns(elapsed));
3172
3173 bps = pps * 8 * pkt_dev->cur_pkt_size;
3174
3175 mbps = bps;
3176 do_div(mbps, 1000000);
3177 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3178 (unsigned long long)pps,
3179 (unsigned long long)mbps,
3180 (unsigned long long)bps,
3181 (unsigned long long)pkt_dev->errors);
3182 }
3183
3184 /* Set stopped-at timer, remove from running list, do counters & statistics */
3185 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3186 {
3187 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3188
3189 if (!pkt_dev->running) {
3190 pr_warn("interface: %s is already stopped\n",
3191 pkt_dev->odevname);
3192 return -EINVAL;
3193 }
3194
3195 pkt_dev->running = 0;
3196 kfree_skb(pkt_dev->skb);
3197 pkt_dev->skb = NULL;
3198 pkt_dev->stopped_at = ktime_get();
3199
3200 show_results(pkt_dev, nr_frags);
3201
3202 return 0;
3203 }
3204
3205 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3206 {
3207 struct pktgen_dev *pkt_dev, *best = NULL;
3208
3209 rcu_read_lock();
3210 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3211 if (!pkt_dev->running)
3212 continue;
3213 if (best == NULL)
3214 best = pkt_dev;
3215 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0)
3216 best = pkt_dev;
3217 }
3218 rcu_read_unlock();
3219
3220 return best;
3221 }
3222
3223 static void pktgen_stop(struct pktgen_thread *t)
3224 {
3225 struct pktgen_dev *pkt_dev;
3226
3227 func_enter();
3228
3229 rcu_read_lock();
3230
3231 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3232 pktgen_stop_device(pkt_dev);
3233 }
3234
3235 rcu_read_unlock();
3236 }
3237
3238 /*
3239 * one of our devices needs to be removed - find it
3240 * and remove it
3241 */
3242 static void pktgen_rem_one_if(struct pktgen_thread *t)
3243 {
3244 struct list_head *q, *n;
3245 struct pktgen_dev *cur;
3246
3247 func_enter();
3248
3249 list_for_each_safe(q, n, &t->if_list) {
3250 cur = list_entry(q, struct pktgen_dev, list);
3251
3252 if (!cur->removal_mark)
3253 continue;
3254
3255 kfree_skb(cur->skb);
3256 cur->skb = NULL;
3257
3258 pktgen_remove_device(t, cur);
3259
3260 break;
3261 }
3262 }
3263
3264 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3265 {
3266 struct list_head *q, *n;
3267 struct pktgen_dev *cur;
3268
3269 func_enter();
3270
3271 /* Remove all devices, free mem */
3272
3273 list_for_each_safe(q, n, &t->if_list) {
3274 cur = list_entry(q, struct pktgen_dev, list);
3275
3276 kfree_skb(cur->skb);
3277 cur->skb = NULL;
3278
3279 pktgen_remove_device(t, cur);
3280 }
3281 }
3282
3283 static void pktgen_rem_thread(struct pktgen_thread *t)
3284 {
3285 /* Remove from the thread list */
3286 remove_proc_entry(t->tsk->comm, t->net->proc_dir);
3287 }
3288
3289 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3290 {
3291 ktime_t idle_start = ktime_get();
3292 schedule();
3293 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3294 }
3295
3296 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3297 {
3298 ktime_t idle_start = ktime_get();
3299
3300 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3301 if (signal_pending(current))
3302 break;
3303
3304 if (need_resched())
3305 pktgen_resched(pkt_dev);
3306 else
3307 cpu_relax();
3308 }
3309 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3310 }
3311
3312 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3313 {
3314 unsigned int burst = ACCESS_ONCE(pkt_dev->burst);
3315 struct net_device *odev = pkt_dev->odev;
3316 struct netdev_queue *txq;
3317 int ret;
3318
3319 /* If device is offline, then don't send */
3320 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3321 pktgen_stop_device(pkt_dev);
3322 return;
3323 }
3324
3325 /* This is max DELAY, this has special meaning of
3326 * "never transmit"
3327 */
3328 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3329 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
3330 return;
3331 }
3332
3333 /* If no skb or clone count exhausted then get new one */
3334 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3335 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3336 /* build a new pkt */
3337 kfree_skb(pkt_dev->skb);
3338
3339 pkt_dev->skb = fill_packet(odev, pkt_dev);
3340 if (pkt_dev->skb == NULL) {
3341 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3342 schedule();
3343 pkt_dev->clone_count--; /* back out increment, OOM */
3344 return;
3345 }
3346 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3347 pkt_dev->allocated_skbs++;
3348 pkt_dev->clone_count = 0; /* reset counter */
3349 }
3350
3351 if (pkt_dev->delay && pkt_dev->last_ok)
3352 spin(pkt_dev, pkt_dev->next_tx);
3353
3354 txq = skb_get_tx_queue(odev, pkt_dev->skb);
3355
3356 local_bh_disable();
3357
3358 HARD_TX_LOCK(odev, txq, smp_processor_id());
3359
3360 if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) {
3361 ret = NETDEV_TX_BUSY;
3362 pkt_dev->last_ok = 0;
3363 goto unlock;
3364 }
3365 atomic_add(burst, &pkt_dev->skb->users);
3366
3367 xmit_more:
3368 ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0);
3369
3370 switch (ret) {
3371 case NETDEV_TX_OK:
3372 pkt_dev->last_ok = 1;
3373 pkt_dev->sofar++;
3374 pkt_dev->seq_num++;
3375 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3376 if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq))
3377 goto xmit_more;
3378 break;
3379 case NET_XMIT_DROP:
3380 case NET_XMIT_CN:
3381 case NET_XMIT_POLICED:
3382 /* skb has been consumed */
3383 pkt_dev->errors++;
3384 break;
3385 default: /* Drivers are not supposed to return other values! */
3386 net_info_ratelimited("%s xmit error: %d\n",
3387 pkt_dev->odevname, ret);
3388 pkt_dev->errors++;
3389 /* fallthru */
3390 case NETDEV_TX_LOCKED:
3391 case NETDEV_TX_BUSY:
3392 /* Retry it next time */
3393 atomic_dec(&(pkt_dev->skb->users));
3394 pkt_dev->last_ok = 0;
3395 }
3396 if (unlikely(burst))
3397 atomic_sub(burst, &pkt_dev->skb->users);
3398 unlock:
3399 HARD_TX_UNLOCK(odev, txq);
3400
3401 local_bh_enable();
3402
3403 /* If pkt_dev->count is zero, then run forever */
3404 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3405 pktgen_wait_for_skb(pkt_dev);
3406
3407 /* Done with this */
3408 pktgen_stop_device(pkt_dev);
3409 }
3410 }
3411
3412 /*
3413 * Main loop of the thread goes here
3414 */
3415
3416 static int pktgen_thread_worker(void *arg)
3417 {
3418 DEFINE_WAIT(wait);
3419 struct pktgen_thread *t = arg;
3420 struct pktgen_dev *pkt_dev = NULL;
3421 int cpu = t->cpu;
3422
3423 BUG_ON(smp_processor_id() != cpu);
3424
3425 init_waitqueue_head(&t->queue);
3426 complete(&t->start_done);
3427
3428 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3429
3430 set_freezable();
3431
3432 __set_current_state(TASK_RUNNING);
3433
3434 while (!kthread_should_stop()) {
3435 pkt_dev = next_to_run(t);
3436
3437 if (unlikely(!pkt_dev && t->control == 0)) {
3438 if (t->net->pktgen_exiting)
3439 break;
3440 wait_event_interruptible_timeout(t->queue,
3441 t->control != 0,
3442 HZ/10);
3443 try_to_freeze();
3444 continue;
3445 }
3446
3447 if (likely(pkt_dev)) {
3448 pktgen_xmit(pkt_dev);
3449
3450 if (need_resched())
3451 pktgen_resched(pkt_dev);
3452 else
3453 cpu_relax();
3454 }
3455
3456 if (t->control & T_STOP) {
3457 pktgen_stop(t);
3458 t->control &= ~(T_STOP);
3459 }
3460
3461 if (t->control & T_RUN) {
3462 pktgen_run(t);
3463 t->control &= ~(T_RUN);
3464 }
3465
3466 if (t->control & T_REMDEVALL) {
3467 pktgen_rem_all_ifs(t);
3468 t->control &= ~(T_REMDEVALL);
3469 }
3470
3471 if (t->control & T_REMDEV) {
3472 pktgen_rem_one_if(t);
3473 t->control &= ~(T_REMDEV);
3474 }
3475
3476 try_to_freeze();
3477 }
3478 set_current_state(TASK_INTERRUPTIBLE);
3479
3480 pr_debug("%s stopping all device\n", t->tsk->comm);
3481 pktgen_stop(t);
3482
3483 pr_debug("%s removing all device\n", t->tsk->comm);
3484 pktgen_rem_all_ifs(t);
3485
3486 pr_debug("%s removing thread\n", t->tsk->comm);
3487 pktgen_rem_thread(t);
3488
3489 /* Wait for kthread_stop */
3490 while (!kthread_should_stop()) {
3491 set_current_state(TASK_INTERRUPTIBLE);
3492 schedule();
3493 }
3494 __set_current_state(TASK_RUNNING);
3495
3496 return 0;
3497 }
3498
3499 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3500 const char *ifname, bool exact)
3501 {
3502 struct pktgen_dev *p, *pkt_dev = NULL;
3503 size_t len = strlen(ifname);
3504
3505 rcu_read_lock();
3506 list_for_each_entry_rcu(p, &t->if_list, list)
3507 if (strncmp(p->odevname, ifname, len) == 0) {
3508 if (p->odevname[len]) {
3509 if (exact || p->odevname[len] != '@')
3510 continue;
3511 }
3512 pkt_dev = p;
3513 break;
3514 }
3515
3516 rcu_read_unlock();
3517 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3518 return pkt_dev;
3519 }
3520
3521 /*
3522 * Adds a dev at front of if_list.
3523 */
3524
3525 static int add_dev_to_thread(struct pktgen_thread *t,
3526 struct pktgen_dev *pkt_dev)
3527 {
3528 int rv = 0;
3529
3530 /* This function cannot be called concurrently, as its called
3531 * under pktgen_thread_lock mutex, but it can run from
3532 * userspace on another CPU than the kthread. The if_lock()
3533 * is used here to sync with concurrent instances of
3534 * _rem_dev_from_if_list() invoked via kthread, which is also
3535 * updating the if_list */
3536 if_lock(t);
3537
3538 if (pkt_dev->pg_thread) {
3539 pr_err("ERROR: already assigned to a thread\n");
3540 rv = -EBUSY;
3541 goto out;
3542 }
3543
3544 pkt_dev->running = 0;
3545 pkt_dev->pg_thread = t;
3546 list_add_rcu(&pkt_dev->list, &t->if_list);
3547
3548 out:
3549 if_unlock(t);
3550 return rv;
3551 }
3552
3553 /* Called under thread lock */
3554
3555 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3556 {
3557 struct pktgen_dev *pkt_dev;
3558 int err;
3559 int node = cpu_to_node(t->cpu);
3560
3561 /* We don't allow a device to be on several threads */
3562
3563 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND);
3564 if (pkt_dev) {
3565 pr_err("ERROR: interface already used\n");
3566 return -EBUSY;
3567 }
3568
3569 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3570 if (!pkt_dev)
3571 return -ENOMEM;
3572
3573 strcpy(pkt_dev->odevname, ifname);
3574 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3575 node);
3576 if (pkt_dev->flows == NULL) {
3577 kfree(pkt_dev);
3578 return -ENOMEM;
3579 }
3580
3581 pkt_dev->removal_mark = 0;
3582 pkt_dev->nfrags = 0;
3583 pkt_dev->delay = pg_delay_d;
3584 pkt_dev->count = pg_count_d;
3585 pkt_dev->sofar = 0;
3586 pkt_dev->udp_src_min = 9; /* sink port */
3587 pkt_dev->udp_src_max = 9;
3588 pkt_dev->udp_dst_min = 9;
3589 pkt_dev->udp_dst_max = 9;
3590 pkt_dev->vlan_p = 0;
3591 pkt_dev->vlan_cfi = 0;
3592 pkt_dev->vlan_id = 0xffff;
3593 pkt_dev->svlan_p = 0;
3594 pkt_dev->svlan_cfi = 0;
3595 pkt_dev->svlan_id = 0xffff;
3596 pkt_dev->burst = 1;
3597 pkt_dev->node = -1;
3598
3599 err = pktgen_setup_dev(t->net, pkt_dev, ifname);
3600 if (err)
3601 goto out1;
3602 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3603 pkt_dev->clone_skb = pg_clone_skb_d;
3604
3605 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir,
3606 &pktgen_if_fops, pkt_dev);
3607 if (!pkt_dev->entry) {
3608 pr_err("cannot create %s/%s procfs entry\n",
3609 PG_PROC_DIR, ifname);
3610 err = -EINVAL;
3611 goto out2;
3612 }
3613 #ifdef CONFIG_XFRM
3614 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3615 pkt_dev->ipsproto = IPPROTO_ESP;
3616
3617 /* xfrm tunnel mode needs additional dst to extract outter
3618 * ip header protocol/ttl/id field, here creat a phony one.
3619 * instead of looking for a valid rt, which definitely hurting
3620 * performance under such circumstance.
3621 */
3622 pkt_dev->dstops.family = AF_INET;
3623 pkt_dev->dst.dev = pkt_dev->odev;
3624 dst_init_metrics(&pkt_dev->dst, pktgen_dst_metrics, false);
3625 pkt_dev->dst.child = &pkt_dev->dst;
3626 pkt_dev->dst.ops = &pkt_dev->dstops;
3627 #endif
3628
3629 return add_dev_to_thread(t, pkt_dev);
3630 out2:
3631 dev_put(pkt_dev->odev);
3632 out1:
3633 #ifdef CONFIG_XFRM
3634 free_SAs(pkt_dev);
3635 #endif
3636 vfree(pkt_dev->flows);
3637 kfree(pkt_dev);
3638 return err;
3639 }
3640
3641 static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
3642 {
3643 struct pktgen_thread *t;
3644 struct proc_dir_entry *pe;
3645 struct task_struct *p;
3646
3647 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3648 cpu_to_node(cpu));
3649 if (!t) {
3650 pr_err("ERROR: out of memory, can't create new thread\n");
3651 return -ENOMEM;
3652 }
3653
3654 spin_lock_init(&t->if_lock);
3655 t->cpu = cpu;
3656
3657 INIT_LIST_HEAD(&t->if_list);
3658
3659 list_add_tail(&t->th_list, &pn->pktgen_threads);
3660 init_completion(&t->start_done);
3661
3662 p = kthread_create_on_node(pktgen_thread_worker,
3663 t,
3664 cpu_to_node(cpu),
3665 "kpktgend_%d", cpu);
3666 if (IS_ERR(p)) {
3667 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3668 list_del(&t->th_list);
3669 kfree(t);
3670 return PTR_ERR(p);
3671 }
3672 kthread_bind(p, cpu);
3673 t->tsk = p;
3674
3675 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
3676 &pktgen_thread_fops, t);
3677 if (!pe) {
3678 pr_err("cannot create %s/%s procfs entry\n",
3679 PG_PROC_DIR, t->tsk->comm);
3680 kthread_stop(p);
3681 list_del(&t->th_list);
3682 kfree(t);
3683 return -EINVAL;
3684 }
3685
3686 t->net = pn;
3687 wake_up_process(p);
3688 wait_for_completion(&t->start_done);
3689
3690 return 0;
3691 }
3692
3693 /*
3694 * Removes a device from the thread if_list.
3695 */
3696 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3697 struct pktgen_dev *pkt_dev)
3698 {
3699 struct list_head *q, *n;
3700 struct pktgen_dev *p;
3701
3702 if_lock(t);
3703 list_for_each_safe(q, n, &t->if_list) {
3704 p = list_entry(q, struct pktgen_dev, list);
3705 if (p == pkt_dev)
3706 list_del_rcu(&p->list);
3707 }
3708 if_unlock(t);
3709 }
3710
3711 static int pktgen_remove_device(struct pktgen_thread *t,
3712 struct pktgen_dev *pkt_dev)
3713 {
3714 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3715
3716 if (pkt_dev->running) {
3717 pr_warn("WARNING: trying to remove a running interface, stopping it now\n");
3718 pktgen_stop_device(pkt_dev);
3719 }
3720
3721 /* Dis-associate from the interface */
3722
3723 if (pkt_dev->odev) {
3724 dev_put(pkt_dev->odev);
3725 pkt_dev->odev = NULL;
3726 }
3727
3728 /* Remove proc before if_list entry, because add_device uses
3729 * list to determine if interface already exist, avoid race
3730 * with proc_create_data() */
3731 if (pkt_dev->entry)
3732 proc_remove(pkt_dev->entry);
3733
3734 /* And update the thread if_list */
3735 _rem_dev_from_if_list(t, pkt_dev);
3736
3737 #ifdef CONFIG_XFRM
3738 free_SAs(pkt_dev);
3739 #endif
3740 vfree(pkt_dev->flows);
3741 if (pkt_dev->page)
3742 put_page(pkt_dev->page);
3743 kfree_rcu(pkt_dev, rcu);
3744 return 0;
3745 }
3746
3747 static int __net_init pg_net_init(struct net *net)
3748 {
3749 struct pktgen_net *pn = net_generic(net, pg_net_id);
3750 struct proc_dir_entry *pe;
3751 int cpu, ret = 0;
3752
3753 pn->net = net;
3754 INIT_LIST_HEAD(&pn->pktgen_threads);
3755 pn->pktgen_exiting = false;
3756 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net);
3757 if (!pn->proc_dir) {
3758 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR);
3759 return -ENODEV;
3760 }
3761 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops);
3762 if (pe == NULL) {
3763 pr_err("cannot create %s procfs entry\n", PGCTRL);
3764 ret = -EINVAL;
3765 goto remove;
3766 }
3767
3768 for_each_online_cpu(cpu) {
3769 int err;
3770
3771 err = pktgen_create_thread(cpu, pn);
3772 if (err)
3773 pr_warn("Cannot create thread for cpu %d (%d)\n",
3774 cpu, err);
3775 }
3776
3777 if (list_empty(&pn->pktgen_threads)) {
3778 pr_err("Initialization failed for all threads\n");
3779 ret = -ENODEV;
3780 goto remove_entry;
3781 }
3782
3783 return 0;
3784
3785 remove_entry:
3786 remove_proc_entry(PGCTRL, pn->proc_dir);
3787 remove:
3788 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3789 return ret;
3790 }
3791
3792 static void __net_exit pg_net_exit(struct net *net)
3793 {
3794 struct pktgen_net *pn = net_generic(net, pg_net_id);
3795 struct pktgen_thread *t;
3796 struct list_head *q, *n;
3797 LIST_HEAD(list);
3798
3799 /* Stop all interfaces & threads */
3800 pn->pktgen_exiting = true;
3801
3802 mutex_lock(&pktgen_thread_lock);
3803 list_splice_init(&pn->pktgen_threads, &list);
3804 mutex_unlock(&pktgen_thread_lock);
3805
3806 list_for_each_safe(q, n, &list) {
3807 t = list_entry(q, struct pktgen_thread, th_list);
3808 list_del(&t->th_list);
3809 kthread_stop(t->tsk);
3810 kfree(t);
3811 }
3812
3813 remove_proc_entry(PGCTRL, pn->proc_dir);
3814 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3815 }
3816
3817 static struct pernet_operations pg_net_ops = {
3818 .init = pg_net_init,
3819 .exit = pg_net_exit,
3820 .id = &pg_net_id,
3821 .size = sizeof(struct pktgen_net),
3822 };
3823
3824 static int __init pg_init(void)
3825 {
3826 int ret = 0;
3827
3828 pr_info("%s", version);
3829 ret = register_pernet_subsys(&pg_net_ops);
3830 if (ret)
3831 return ret;
3832 ret = register_netdevice_notifier(&pktgen_notifier_block);
3833 if (ret)
3834 unregister_pernet_subsys(&pg_net_ops);
3835
3836 return ret;
3837 }
3838
3839 static void __exit pg_cleanup(void)
3840 {
3841 unregister_netdevice_notifier(&pktgen_notifier_block);
3842 unregister_pernet_subsys(&pg_net_ops);
3843 /* Don't need rcu_barrier() due to use of kfree_rcu() */
3844 }
3845
3846 module_init(pg_init);
3847 module_exit(pg_cleanup);
3848
3849 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3850 MODULE_DESCRIPTION("Packet Generator tool");
3851 MODULE_LICENSE("GPL");
3852 MODULE_VERSION(VERSION);
3853 module_param(pg_count_d, int, 0);
3854 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3855 module_param(pg_delay_d, int, 0);
3856 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3857 module_param(pg_clone_skb_d, int, 0);
3858 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3859 module_param(debug, int, 0);
3860 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
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