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drivers/net/ethernet/amd/pcnet32.c: neaten and remove unnecessary OOM messages
[linux/fpc-iii.git] / net / core / pktgen.c
blob8b849ddfef2e743676fe35642cd49d36188dd74d
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
206 /* Thread control flag bits */
207 #define T_STOP (1<<0) /* Stop run */
208 #define T_RUN (1<<1) /* Start run */
209 #define T_REMDEVALL (1<<2) /* Remove all devs */
210 #define T_REMDEV (1<<3) /* Remove one dev */
211
212 /* If lock -- protects updating of if_list */
213 #define if_lock(t) spin_lock(&(t->if_lock));
214 #define if_unlock(t) spin_unlock(&(t->if_lock));
215
216 /* Used to help with determining the pkts on receive */
217 #define PKTGEN_MAGIC 0xbe9be955
218 #define PG_PROC_DIR "pktgen"
219 #define PGCTRL "pgctrl"
220
221 #define MAX_CFLOWS 65536
222
223 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
224 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
225
226 struct flow_state {
227 __be32 cur_daddr;
228 int count;
229 #ifdef CONFIG_XFRM
230 struct xfrm_state *x;
231 #endif
232 __u32 flags;
233 };
234
235 /* flow flag bits */
236 #define F_INIT (1<<0) /* flow has been initialized */
237
238 struct pktgen_dev {
239 /*
240 * Try to keep frequent/infrequent used vars. separated.
241 */
242 struct proc_dir_entry *entry; /* proc file */
243 struct pktgen_thread *pg_thread;/* the owner */
244 struct list_head list; /* chaining in the thread's run-queue */
245 struct rcu_head rcu; /* freed by RCU */
246
247 int running; /* if false, the test will stop */
248
249 /* If min != max, then we will either do a linear iteration, or
250 * we will do a random selection from within the range.
251 */
252 __u32 flags;
253 int removal_mark; /* non-zero => the device is marked for
254 * removal by worker thread */
255
256 int min_pkt_size;
257 int max_pkt_size;
258 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
259 int nfrags;
260 struct page *page;
261 u64 delay; /* nano-seconds */
262
263 __u64 count; /* Default No packets to send */
264 __u64 sofar; /* How many pkts we've sent so far */
265 __u64 tx_bytes; /* How many bytes we've transmitted */
266 __u64 errors; /* Errors when trying to transmit, */
267
268 /* runtime counters relating to clone_skb */
269
270 __u64 allocated_skbs;
271 __u32 clone_count;
272 int last_ok; /* Was last skb sent?
273 * Or a failed transmit of some sort?
274 * This will keep sequence numbers in order
275 */
276 ktime_t next_tx;
277 ktime_t started_at;
278 ktime_t stopped_at;
279 u64 idle_acc; /* nano-seconds */
280
281 __u32 seq_num;
282
283 int clone_skb; /*
284 * Use multiple SKBs during packet gen.
285 * If this number is greater than 1, then
286 * that many copies of the same packet will be
287 * sent before a new packet is allocated.
288 * If you want to send 1024 identical packets
289 * before creating a new packet,
290 * set clone_skb to 1024.
291 */
292
293 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
294 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
295 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
296 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
297
298 struct in6_addr in6_saddr;
299 struct in6_addr in6_daddr;
300 struct in6_addr cur_in6_daddr;
301 struct in6_addr cur_in6_saddr;
302 /* For ranges */
303 struct in6_addr min_in6_daddr;
304 struct in6_addr max_in6_daddr;
305 struct in6_addr min_in6_saddr;
306 struct in6_addr max_in6_saddr;
307
308 /* If we're doing ranges, random or incremental, then this
309 * defines the min/max for those ranges.
310 */
311 __be32 saddr_min; /* inclusive, source IP address */
312 __be32 saddr_max; /* exclusive, source IP address */
313 __be32 daddr_min; /* inclusive, dest IP address */
314 __be32 daddr_max; /* exclusive, dest IP address */
315
316 __u16 udp_src_min; /* inclusive, source UDP port */
317 __u16 udp_src_max; /* exclusive, source UDP port */
318 __u16 udp_dst_min; /* inclusive, dest UDP port */
319 __u16 udp_dst_max; /* exclusive, dest UDP port */
320
321 /* DSCP + ECN */
322 __u8 tos; /* six MSB of (former) IPv4 TOS
323 are for dscp codepoint */
324 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
325 (see RFC 3260, sec. 4) */
326
327 /* MPLS */
328 unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */
329 __be32 labels[MAX_MPLS_LABELS];
330
331 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
332 __u8 vlan_p;
333 __u8 vlan_cfi;
334 __u16 vlan_id; /* 0xffff means no vlan tag */
335
336 __u8 svlan_p;
337 __u8 svlan_cfi;
338 __u16 svlan_id; /* 0xffff means no svlan tag */
339
340 __u32 src_mac_count; /* How many MACs to iterate through */
341 __u32 dst_mac_count; /* How many MACs to iterate through */
342
343 unsigned char dst_mac[ETH_ALEN];
344 unsigned char src_mac[ETH_ALEN];
345
346 __u32 cur_dst_mac_offset;
347 __u32 cur_src_mac_offset;
348 __be32 cur_saddr;
349 __be32 cur_daddr;
350 __u16 ip_id;
351 __u16 cur_udp_dst;
352 __u16 cur_udp_src;
353 __u16 cur_queue_map;
354 __u32 cur_pkt_size;
355 __u32 last_pkt_size;
356
357 __u8 hh[14];
358 /* = {
359 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
360
361 We fill in SRC address later
362 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
363 0x08, 0x00
364 };
365 */
366 __u16 pad; /* pad out the hh struct to an even 16 bytes */
367
368 struct sk_buff *skb; /* skb we are to transmit next, used for when we
369 * are transmitting the same one multiple times
370 */
371 struct net_device *odev; /* The out-going device.
372 * Note that the device should have it's
373 * pg_info pointer pointing back to this
374 * device.
375 * Set when the user specifies the out-going
376 * device name (not when the inject is
377 * started as it used to do.)
378 */
379 char odevname[32];
380 struct flow_state *flows;
381 unsigned int cflows; /* Concurrent flows (config) */
382 unsigned int lflow; /* Flow length (config) */
383 unsigned int nflows; /* accumulated flows (stats) */
384 unsigned int curfl; /* current sequenced flow (state)*/
385
386 u16 queue_map_min;
387 u16 queue_map_max;
388 __u32 skb_priority; /* skb priority field */
389 int node; /* Memory node */
390
391 #ifdef CONFIG_XFRM
392 __u8 ipsmode; /* IPSEC mode (config) */
393 __u8 ipsproto; /* IPSEC type (config) */
394 __u32 spi;
395 struct dst_entry dst;
396 struct dst_ops dstops;
397 #endif
398 char result[512];
399 };
400
401 struct pktgen_hdr {
402 __be32 pgh_magic;
403 __be32 seq_num;
404 __be32 tv_sec;
405 __be32 tv_usec;
406 };
407
408
409 static int pg_net_id __read_mostly;
410
411 struct pktgen_net {
412 struct net *net;
413 struct proc_dir_entry *proc_dir;
414 struct list_head pktgen_threads;
415 bool pktgen_exiting;
416 };
417
418 struct pktgen_thread {
419 spinlock_t if_lock; /* for list of devices */
420 struct list_head if_list; /* All device here */
421 struct list_head th_list;
422 struct task_struct *tsk;
423 char result[512];
424
425 /* Field for thread to receive "posted" events terminate,
426 stop ifs etc. */
427
428 u32 control;
429 int cpu;
430
431 wait_queue_head_t queue;
432 struct completion start_done;
433 struct pktgen_net *net;
434 };
435
436 #define REMOVE 1
437 #define FIND 0
438
439 static const char version[] =
440 "Packet Generator for packet performance testing. "
441 "Version: " VERSION "\n";
442
443 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
444 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
445 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
446 const char *ifname, bool exact);
447 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
448 static void pktgen_run_all_threads(struct pktgen_net *pn);
449 static void pktgen_reset_all_threads(struct pktgen_net *pn);
450 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn);
451
452 static void pktgen_stop(struct pktgen_thread *t);
453 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
454
455 /* Module parameters, defaults. */
456 static int pg_count_d __read_mostly = 1000;
457 static int pg_delay_d __read_mostly;
458 static int pg_clone_skb_d __read_mostly;
459 static int debug __read_mostly;
460
461 static DEFINE_MUTEX(pktgen_thread_lock);
462
463 static struct notifier_block pktgen_notifier_block = {
464 .notifier_call = pktgen_device_event,
465 };
466
467 /*
468 * /proc handling functions
469 *
470 */
471
472 static int pgctrl_show(struct seq_file *seq, void *v)
473 {
474 seq_puts(seq, version);
475 return 0;
476 }
477
478 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
479 size_t count, loff_t *ppos)
480 {
481 char data[128];
482 struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
483
484 if (!capable(CAP_NET_ADMIN))
485 return -EPERM;
486
487 if (count == 0)
488 return -EINVAL;
489
490 if (count > sizeof(data))
491 count = sizeof(data);
492
493 if (copy_from_user(data, buf, count))
494 return -EFAULT;
495
496 data[count - 1] = 0; /* Strip trailing '\n' and terminate string */
497
498 if (!strcmp(data, "stop"))
499 pktgen_stop_all_threads_ifs(pn);
500
501 else if (!strcmp(data, "start"))
502 pktgen_run_all_threads(pn);
503
504 else if (!strcmp(data, "reset"))
505 pktgen_reset_all_threads(pn);
506
507 else
508 pr_warning("Unknown command: %s\n", data);
509
510 return count;
511 }
512
513 static int pgctrl_open(struct inode *inode, struct file *file)
514 {
515 return single_open(file, pgctrl_show, PDE_DATA(inode));
516 }
517
518 static const struct file_operations pktgen_fops = {
519 .owner = THIS_MODULE,
520 .open = pgctrl_open,
521 .read = seq_read,
522 .llseek = seq_lseek,
523 .write = pgctrl_write,
524 .release = single_release,
525 };
526
527 static int pktgen_if_show(struct seq_file *seq, void *v)
528 {
529 const struct pktgen_dev *pkt_dev = seq->private;
530 ktime_t stopped;
531 u64 idle;
532
533 seq_printf(seq,
534 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
535 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
536 pkt_dev->max_pkt_size);
537
538 seq_printf(seq,
539 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
540 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
541 pkt_dev->clone_skb, pkt_dev->odevname);
542
543 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
544 pkt_dev->lflow);
545
546 seq_printf(seq,
547 " queue_map_min: %u queue_map_max: %u\n",
548 pkt_dev->queue_map_min,
549 pkt_dev->queue_map_max);
550
551 if (pkt_dev->skb_priority)
552 seq_printf(seq, " skb_priority: %u\n",
553 pkt_dev->skb_priority);
554
555 if (pkt_dev->flags & F_IPV6) {
556 seq_printf(seq,
557 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
558 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
559 &pkt_dev->in6_saddr,
560 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
561 &pkt_dev->in6_daddr,
562 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
563 } else {
564 seq_printf(seq,
565 " dst_min: %s dst_max: %s\n",
566 pkt_dev->dst_min, pkt_dev->dst_max);
567 seq_printf(seq,
568 " src_min: %s src_max: %s\n",
569 pkt_dev->src_min, pkt_dev->src_max);
570 }
571
572 seq_puts(seq, " src_mac: ");
573
574 seq_printf(seq, "%pM ",
575 is_zero_ether_addr(pkt_dev->src_mac) ?
576 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
577
578 seq_puts(seq, "dst_mac: ");
579 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
580
581 seq_printf(seq,
582 " udp_src_min: %d udp_src_max: %d"
583 " udp_dst_min: %d udp_dst_max: %d\n",
584 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
585 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
586
587 seq_printf(seq,
588 " src_mac_count: %d dst_mac_count: %d\n",
589 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
590
591 if (pkt_dev->nr_labels) {
592 unsigned int i;
593 seq_puts(seq, " mpls: ");
594 for (i = 0; i < pkt_dev->nr_labels; i++)
595 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
596 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
597 }
598
599 if (pkt_dev->vlan_id != 0xffff)
600 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
601 pkt_dev->vlan_id, pkt_dev->vlan_p,
602 pkt_dev->vlan_cfi);
603
604 if (pkt_dev->svlan_id != 0xffff)
605 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
606 pkt_dev->svlan_id, pkt_dev->svlan_p,
607 pkt_dev->svlan_cfi);
608
609 if (pkt_dev->tos)
610 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
611
612 if (pkt_dev->traffic_class)
613 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
614
615 if (pkt_dev->node >= 0)
616 seq_printf(seq, " node: %d\n", pkt_dev->node);
617
618 seq_puts(seq, " Flags: ");
619
620 if (pkt_dev->flags & F_IPV6)
621 seq_puts(seq, "IPV6 ");
622
623 if (pkt_dev->flags & F_IPSRC_RND)
624 seq_puts(seq, "IPSRC_RND ");
625
626 if (pkt_dev->flags & F_IPDST_RND)
627 seq_puts(seq, "IPDST_RND ");
628
629 if (pkt_dev->flags & F_TXSIZE_RND)
630 seq_puts(seq, "TXSIZE_RND ");
631
632 if (pkt_dev->flags & F_UDPSRC_RND)
633 seq_puts(seq, "UDPSRC_RND ");
634
635 if (pkt_dev->flags & F_UDPDST_RND)
636 seq_puts(seq, "UDPDST_RND ");
637
638 if (pkt_dev->flags & F_UDPCSUM)
639 seq_puts(seq, "UDPCSUM ");
640
641 if (pkt_dev->flags & F_MPLS_RND)
642 seq_puts(seq, "MPLS_RND ");
643
644 if (pkt_dev->flags & F_QUEUE_MAP_RND)
645 seq_puts(seq, "QUEUE_MAP_RND ");
646
647 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
648 seq_puts(seq, "QUEUE_MAP_CPU ");
649
650 if (pkt_dev->cflows) {
651 if (pkt_dev->flags & F_FLOW_SEQ)
652 seq_puts(seq, "FLOW_SEQ "); /*in sequence flows*/
653 else
654 seq_puts(seq, "FLOW_RND ");
655 }
656
657 #ifdef CONFIG_XFRM
658 if (pkt_dev->flags & F_IPSEC_ON) {
659 seq_puts(seq, "IPSEC ");
660 if (pkt_dev->spi)
661 seq_printf(seq, "spi:%u", pkt_dev->spi);
662 }
663 #endif
664
665 if (pkt_dev->flags & F_MACSRC_RND)
666 seq_puts(seq, "MACSRC_RND ");
667
668 if (pkt_dev->flags & F_MACDST_RND)
669 seq_puts(seq, "MACDST_RND ");
670
671 if (pkt_dev->flags & F_VID_RND)
672 seq_puts(seq, "VID_RND ");
673
674 if (pkt_dev->flags & F_SVID_RND)
675 seq_puts(seq, "SVID_RND ");
676
677 if (pkt_dev->flags & F_NODE)
678 seq_puts(seq, "NODE_ALLOC ");
679
680 seq_puts(seq, "\n");
681
682 /* not really stopped, more like last-running-at */
683 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at;
684 idle = pkt_dev->idle_acc;
685 do_div(idle, NSEC_PER_USEC);
686
687 seq_printf(seq,
688 "Current:\n pkts-sofar: %llu errors: %llu\n",
689 (unsigned long long)pkt_dev->sofar,
690 (unsigned long long)pkt_dev->errors);
691
692 seq_printf(seq,
693 " started: %lluus stopped: %lluus idle: %lluus\n",
694 (unsigned long long) ktime_to_us(pkt_dev->started_at),
695 (unsigned long long) ktime_to_us(stopped),
696 (unsigned long long) idle);
697
698 seq_printf(seq,
699 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
700 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
701 pkt_dev->cur_src_mac_offset);
702
703 if (pkt_dev->flags & F_IPV6) {
704 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
705 &pkt_dev->cur_in6_saddr,
706 &pkt_dev->cur_in6_daddr);
707 } else
708 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n",
709 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
710
711 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
712 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
713
714 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
715
716 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
717
718 if (pkt_dev->result[0])
719 seq_printf(seq, "Result: %s\n", pkt_dev->result);
720 else
721 seq_puts(seq, "Result: Idle\n");
722
723 return 0;
724 }
725
726
727 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
728 __u32 *num)
729 {
730 int i = 0;
731 *num = 0;
732
733 for (; i < maxlen; i++) {
734 int value;
735 char c;
736 *num <<= 4;
737 if (get_user(c, &user_buffer[i]))
738 return -EFAULT;
739 value = hex_to_bin(c);
740 if (value >= 0)
741 *num |= value;
742 else
743 break;
744 }
745 return i;
746 }
747
748 static int count_trail_chars(const char __user * user_buffer,
749 unsigned int maxlen)
750 {
751 int i;
752
753 for (i = 0; i < maxlen; i++) {
754 char c;
755 if (get_user(c, &user_buffer[i]))
756 return -EFAULT;
757 switch (c) {
758 case '\"':
759 case '\n':
760 case '\r':
761 case '\t':
762 case ' ':
763 case '=':
764 break;
765 default:
766 goto done;
767 }
768 }
769 done:
770 return i;
771 }
772
773 static long num_arg(const char __user *user_buffer, unsigned long maxlen,
774 unsigned long *num)
775 {
776 int i;
777 *num = 0;
778
779 for (i = 0; i < maxlen; i++) {
780 char c;
781 if (get_user(c, &user_buffer[i]))
782 return -EFAULT;
783 if ((c >= '0') && (c <= '9')) {
784 *num *= 10;
785 *num += c - '0';
786 } else
787 break;
788 }
789 return i;
790 }
791
792 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
793 {
794 int i;
795
796 for (i = 0; i < maxlen; i++) {
797 char c;
798 if (get_user(c, &user_buffer[i]))
799 return -EFAULT;
800 switch (c) {
801 case '\"':
802 case '\n':
803 case '\r':
804 case '\t':
805 case ' ':
806 goto done_str;
807 default:
808 break;
809 }
810 }
811 done_str:
812 return i;
813 }
814
815 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
816 {
817 unsigned int n = 0;
818 char c;
819 ssize_t i = 0;
820 int len;
821
822 pkt_dev->nr_labels = 0;
823 do {
824 __u32 tmp;
825 len = hex32_arg(&buffer[i], 8, &tmp);
826 if (len <= 0)
827 return len;
828 pkt_dev->labels[n] = htonl(tmp);
829 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
830 pkt_dev->flags |= F_MPLS_RND;
831 i += len;
832 if (get_user(c, &buffer[i]))
833 return -EFAULT;
834 i++;
835 n++;
836 if (n >= MAX_MPLS_LABELS)
837 return -E2BIG;
838 } while (c == ',');
839
840 pkt_dev->nr_labels = n;
841 return i;
842 }
843
844 static ssize_t pktgen_if_write(struct file *file,
845 const char __user * user_buffer, size_t count,
846 loff_t * offset)
847 {
848 struct seq_file *seq = file->private_data;
849 struct pktgen_dev *pkt_dev = seq->private;
850 int i, max, len;
851 char name[16], valstr[32];
852 unsigned long value = 0;
853 char *pg_result = NULL;
854 int tmp = 0;
855 char buf[128];
856
857 pg_result = &(pkt_dev->result[0]);
858
859 if (count < 1) {
860 pr_warning("wrong command format\n");
861 return -EINVAL;
862 }
863
864 max = count;
865 tmp = count_trail_chars(user_buffer, max);
866 if (tmp < 0) {
867 pr_warning("illegal format\n");
868 return tmp;
869 }
870 i = tmp;
871
872 /* Read variable name */
873
874 len = strn_len(&user_buffer[i], sizeof(name) - 1);
875 if (len < 0)
876 return len;
877
878 memset(name, 0, sizeof(name));
879 if (copy_from_user(name, &user_buffer[i], len))
880 return -EFAULT;
881 i += len;
882
883 max = count - i;
884 len = count_trail_chars(&user_buffer[i], max);
885 if (len < 0)
886 return len;
887
888 i += len;
889
890 if (debug) {
891 size_t copy = min_t(size_t, count, 1023);
892 char tb[copy + 1];
893 if (copy_from_user(tb, user_buffer, copy))
894 return -EFAULT;
895 tb[copy] = 0;
896 pr_debug("%s,%lu buffer -:%s:-\n",
897 name, (unsigned long)count, tb);
898 }
899
900 if (!strcmp(name, "min_pkt_size")) {
901 len = num_arg(&user_buffer[i], 10, &value);
902 if (len < 0)
903 return len;
904
905 i += len;
906 if (value < 14 + 20 + 8)
907 value = 14 + 20 + 8;
908 if (value != pkt_dev->min_pkt_size) {
909 pkt_dev->min_pkt_size = value;
910 pkt_dev->cur_pkt_size = value;
911 }
912 sprintf(pg_result, "OK: min_pkt_size=%u",
913 pkt_dev->min_pkt_size);
914 return count;
915 }
916
917 if (!strcmp(name, "max_pkt_size")) {
918 len = num_arg(&user_buffer[i], 10, &value);
919 if (len < 0)
920 return len;
921
922 i += len;
923 if (value < 14 + 20 + 8)
924 value = 14 + 20 + 8;
925 if (value != pkt_dev->max_pkt_size) {
926 pkt_dev->max_pkt_size = value;
927 pkt_dev->cur_pkt_size = value;
928 }
929 sprintf(pg_result, "OK: max_pkt_size=%u",
930 pkt_dev->max_pkt_size);
931 return count;
932 }
933
934 /* Shortcut for min = max */
935
936 if (!strcmp(name, "pkt_size")) {
937 len = num_arg(&user_buffer[i], 10, &value);
938 if (len < 0)
939 return len;
940
941 i += len;
942 if (value < 14 + 20 + 8)
943 value = 14 + 20 + 8;
944 if (value != pkt_dev->min_pkt_size) {
945 pkt_dev->min_pkt_size = value;
946 pkt_dev->max_pkt_size = value;
947 pkt_dev->cur_pkt_size = value;
948 }
949 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
950 return count;
951 }
952
953 if (!strcmp(name, "debug")) {
954 len = num_arg(&user_buffer[i], 10, &value);
955 if (len < 0)
956 return len;
957
958 i += len;
959 debug = value;
960 sprintf(pg_result, "OK: debug=%u", debug);
961 return count;
962 }
963
964 if (!strcmp(name, "frags")) {
965 len = num_arg(&user_buffer[i], 10, &value);
966 if (len < 0)
967 return len;
968
969 i += len;
970 pkt_dev->nfrags = value;
971 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
972 return count;
973 }
974 if (!strcmp(name, "delay")) {
975 len = num_arg(&user_buffer[i], 10, &value);
976 if (len < 0)
977 return len;
978
979 i += len;
980 if (value == 0x7FFFFFFF)
981 pkt_dev->delay = ULLONG_MAX;
982 else
983 pkt_dev->delay = (u64)value;
984
985 sprintf(pg_result, "OK: delay=%llu",
986 (unsigned long long) pkt_dev->delay);
987 return count;
988 }
989 if (!strcmp(name, "rate")) {
990 len = num_arg(&user_buffer[i], 10, &value);
991 if (len < 0)
992 return len;
993
994 i += len;
995 if (!value)
996 return len;
997 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
998 if (debug)
999 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1000
1001 sprintf(pg_result, "OK: rate=%lu", value);
1002 return count;
1003 }
1004 if (!strcmp(name, "ratep")) {
1005 len = num_arg(&user_buffer[i], 10, &value);
1006 if (len < 0)
1007 return len;
1008
1009 i += len;
1010 if (!value)
1011 return len;
1012 pkt_dev->delay = NSEC_PER_SEC/value;
1013 if (debug)
1014 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1015
1016 sprintf(pg_result, "OK: rate=%lu", value);
1017 return count;
1018 }
1019 if (!strcmp(name, "udp_src_min")) {
1020 len = num_arg(&user_buffer[i], 10, &value);
1021 if (len < 0)
1022 return len;
1023
1024 i += len;
1025 if (value != pkt_dev->udp_src_min) {
1026 pkt_dev->udp_src_min = value;
1027 pkt_dev->cur_udp_src = value;
1028 }
1029 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1030 return count;
1031 }
1032 if (!strcmp(name, "udp_dst_min")) {
1033 len = num_arg(&user_buffer[i], 10, &value);
1034 if (len < 0)
1035 return len;
1036
1037 i += len;
1038 if (value != pkt_dev->udp_dst_min) {
1039 pkt_dev->udp_dst_min = value;
1040 pkt_dev->cur_udp_dst = value;
1041 }
1042 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1043 return count;
1044 }
1045 if (!strcmp(name, "udp_src_max")) {
1046 len = num_arg(&user_buffer[i], 10, &value);
1047 if (len < 0)
1048 return len;
1049
1050 i += len;
1051 if (value != pkt_dev->udp_src_max) {
1052 pkt_dev->udp_src_max = value;
1053 pkt_dev->cur_udp_src = value;
1054 }
1055 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1056 return count;
1057 }
1058 if (!strcmp(name, "udp_dst_max")) {
1059 len = num_arg(&user_buffer[i], 10, &value);
1060 if (len < 0)
1061 return len;
1062
1063 i += len;
1064 if (value != pkt_dev->udp_dst_max) {
1065 pkt_dev->udp_dst_max = value;
1066 pkt_dev->cur_udp_dst = value;
1067 }
1068 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1069 return count;
1070 }
1071 if (!strcmp(name, "clone_skb")) {
1072 len = num_arg(&user_buffer[i], 10, &value);
1073 if (len < 0)
1074 return len;
1075 if ((value > 0) &&
1076 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1077 return -ENOTSUPP;
1078 i += len;
1079 pkt_dev->clone_skb = value;
1080
1081 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1082 return count;
1083 }
1084 if (!strcmp(name, "count")) {
1085 len = num_arg(&user_buffer[i], 10, &value);
1086 if (len < 0)
1087 return len;
1088
1089 i += len;
1090 pkt_dev->count = value;
1091 sprintf(pg_result, "OK: count=%llu",
1092 (unsigned long long)pkt_dev->count);
1093 return count;
1094 }
1095 if (!strcmp(name, "src_mac_count")) {
1096 len = num_arg(&user_buffer[i], 10, &value);
1097 if (len < 0)
1098 return len;
1099
1100 i += len;
1101 if (pkt_dev->src_mac_count != value) {
1102 pkt_dev->src_mac_count = value;
1103 pkt_dev->cur_src_mac_offset = 0;
1104 }
1105 sprintf(pg_result, "OK: src_mac_count=%d",
1106 pkt_dev->src_mac_count);
1107 return count;
1108 }
1109 if (!strcmp(name, "dst_mac_count")) {
1110 len = num_arg(&user_buffer[i], 10, &value);
1111 if (len < 0)
1112 return len;
1113
1114 i += len;
1115 if (pkt_dev->dst_mac_count != value) {
1116 pkt_dev->dst_mac_count = value;
1117 pkt_dev->cur_dst_mac_offset = 0;
1118 }
1119 sprintf(pg_result, "OK: dst_mac_count=%d",
1120 pkt_dev->dst_mac_count);
1121 return count;
1122 }
1123 if (!strcmp(name, "node")) {
1124 len = num_arg(&user_buffer[i], 10, &value);
1125 if (len < 0)
1126 return len;
1127
1128 i += len;
1129
1130 if (node_possible(value)) {
1131 pkt_dev->node = value;
1132 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1133 if (pkt_dev->page) {
1134 put_page(pkt_dev->page);
1135 pkt_dev->page = NULL;
1136 }
1137 }
1138 else
1139 sprintf(pg_result, "ERROR: node not possible");
1140 return count;
1141 }
1142 if (!strcmp(name, "flag")) {
1143 char f[32];
1144 memset(f, 0, 32);
1145 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1146 if (len < 0)
1147 return len;
1148
1149 if (copy_from_user(f, &user_buffer[i], len))
1150 return -EFAULT;
1151 i += len;
1152 if (strcmp(f, "IPSRC_RND") == 0)
1153 pkt_dev->flags |= F_IPSRC_RND;
1154
1155 else if (strcmp(f, "!IPSRC_RND") == 0)
1156 pkt_dev->flags &= ~F_IPSRC_RND;
1157
1158 else if (strcmp(f, "TXSIZE_RND") == 0)
1159 pkt_dev->flags |= F_TXSIZE_RND;
1160
1161 else if (strcmp(f, "!TXSIZE_RND") == 0)
1162 pkt_dev->flags &= ~F_TXSIZE_RND;
1163
1164 else if (strcmp(f, "IPDST_RND") == 0)
1165 pkt_dev->flags |= F_IPDST_RND;
1166
1167 else if (strcmp(f, "!IPDST_RND") == 0)
1168 pkt_dev->flags &= ~F_IPDST_RND;
1169
1170 else if (strcmp(f, "UDPSRC_RND") == 0)
1171 pkt_dev->flags |= F_UDPSRC_RND;
1172
1173 else if (strcmp(f, "!UDPSRC_RND") == 0)
1174 pkt_dev->flags &= ~F_UDPSRC_RND;
1175
1176 else if (strcmp(f, "UDPDST_RND") == 0)
1177 pkt_dev->flags |= F_UDPDST_RND;
1178
1179 else if (strcmp(f, "!UDPDST_RND") == 0)
1180 pkt_dev->flags &= ~F_UDPDST_RND;
1181
1182 else if (strcmp(f, "MACSRC_RND") == 0)
1183 pkt_dev->flags |= F_MACSRC_RND;
1184
1185 else if (strcmp(f, "!MACSRC_RND") == 0)
1186 pkt_dev->flags &= ~F_MACSRC_RND;
1187
1188 else if (strcmp(f, "MACDST_RND") == 0)
1189 pkt_dev->flags |= F_MACDST_RND;
1190
1191 else if (strcmp(f, "!MACDST_RND") == 0)
1192 pkt_dev->flags &= ~F_MACDST_RND;
1193
1194 else if (strcmp(f, "MPLS_RND") == 0)
1195 pkt_dev->flags |= F_MPLS_RND;
1196
1197 else if (strcmp(f, "!MPLS_RND") == 0)
1198 pkt_dev->flags &= ~F_MPLS_RND;
1199
1200 else if (strcmp(f, "VID_RND") == 0)
1201 pkt_dev->flags |= F_VID_RND;
1202
1203 else if (strcmp(f, "!VID_RND") == 0)
1204 pkt_dev->flags &= ~F_VID_RND;
1205
1206 else if (strcmp(f, "SVID_RND") == 0)
1207 pkt_dev->flags |= F_SVID_RND;
1208
1209 else if (strcmp(f, "!SVID_RND") == 0)
1210 pkt_dev->flags &= ~F_SVID_RND;
1211
1212 else if (strcmp(f, "FLOW_SEQ") == 0)
1213 pkt_dev->flags |= F_FLOW_SEQ;
1214
1215 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1216 pkt_dev->flags |= F_QUEUE_MAP_RND;
1217
1218 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1219 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1220
1221 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1222 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1223
1224 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1225 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1226 #ifdef CONFIG_XFRM
1227 else if (strcmp(f, "IPSEC") == 0)
1228 pkt_dev->flags |= F_IPSEC_ON;
1229 #endif
1230
1231 else if (strcmp(f, "!IPV6") == 0)
1232 pkt_dev->flags &= ~F_IPV6;
1233
1234 else if (strcmp(f, "NODE_ALLOC") == 0)
1235 pkt_dev->flags |= F_NODE;
1236
1237 else if (strcmp(f, "!NODE_ALLOC") == 0)
1238 pkt_dev->flags &= ~F_NODE;
1239
1240 else if (strcmp(f, "UDPCSUM") == 0)
1241 pkt_dev->flags |= F_UDPCSUM;
1242
1243 else if (strcmp(f, "!UDPCSUM") == 0)
1244 pkt_dev->flags &= ~F_UDPCSUM;
1245
1246 else {
1247 sprintf(pg_result,
1248 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1249 f,
1250 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1251 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, "
1252 "MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, "
1253 "QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, "
1254 #ifdef CONFIG_XFRM
1255 "IPSEC, "
1256 #endif
1257 "NODE_ALLOC\n");
1258 return count;
1259 }
1260 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1261 return count;
1262 }
1263 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1264 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1265 if (len < 0)
1266 return len;
1267
1268 if (copy_from_user(buf, &user_buffer[i], len))
1269 return -EFAULT;
1270 buf[len] = 0;
1271 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1272 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1273 strncpy(pkt_dev->dst_min, buf, len);
1274 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1275 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1276 }
1277 if (debug)
1278 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
1279 i += len;
1280 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1281 return count;
1282 }
1283 if (!strcmp(name, "dst_max")) {
1284 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1285 if (len < 0)
1286 return len;
1287
1288
1289 if (copy_from_user(buf, &user_buffer[i], len))
1290 return -EFAULT;
1291
1292 buf[len] = 0;
1293 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1294 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1295 strncpy(pkt_dev->dst_max, buf, len);
1296 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1297 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1298 }
1299 if (debug)
1300 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
1301 i += len;
1302 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1303 return count;
1304 }
1305 if (!strcmp(name, "dst6")) {
1306 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1307 if (len < 0)
1308 return len;
1309
1310 pkt_dev->flags |= F_IPV6;
1311
1312 if (copy_from_user(buf, &user_buffer[i], len))
1313 return -EFAULT;
1314 buf[len] = 0;
1315
1316 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
1317 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1318
1319 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1320
1321 if (debug)
1322 pr_debug("dst6 set to: %s\n", buf);
1323
1324 i += len;
1325 sprintf(pg_result, "OK: dst6=%s", buf);
1326 return count;
1327 }
1328 if (!strcmp(name, "dst6_min")) {
1329 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1330 if (len < 0)
1331 return len;
1332
1333 pkt_dev->flags |= F_IPV6;
1334
1335 if (copy_from_user(buf, &user_buffer[i], len))
1336 return -EFAULT;
1337 buf[len] = 0;
1338
1339 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
1340 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1341
1342 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
1343 if (debug)
1344 pr_debug("dst6_min set to: %s\n", buf);
1345
1346 i += len;
1347 sprintf(pg_result, "OK: dst6_min=%s", buf);
1348 return count;
1349 }
1350 if (!strcmp(name, "dst6_max")) {
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->max_in6_daddr.s6_addr, -1, NULL);
1362 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1363
1364 if (debug)
1365 pr_debug("dst6_max set to: %s\n", buf);
1366
1367 i += len;
1368 sprintf(pg_result, "OK: dst6_max=%s", buf);
1369 return count;
1370 }
1371 if (!strcmp(name, "src6")) {
1372 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1373 if (len < 0)
1374 return len;
1375
1376 pkt_dev->flags |= F_IPV6;
1377
1378 if (copy_from_user(buf, &user_buffer[i], len))
1379 return -EFAULT;
1380 buf[len] = 0;
1381
1382 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
1383 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1384
1385 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1386
1387 if (debug)
1388 pr_debug("src6 set to: %s\n", buf);
1389
1390 i += len;
1391 sprintf(pg_result, "OK: src6=%s", buf);
1392 return count;
1393 }
1394 if (!strcmp(name, "src_min")) {
1395 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1396 if (len < 0)
1397 return len;
1398
1399 if (copy_from_user(buf, &user_buffer[i], len))
1400 return -EFAULT;
1401 buf[len] = 0;
1402 if (strcmp(buf, pkt_dev->src_min) != 0) {
1403 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1404 strncpy(pkt_dev->src_min, buf, len);
1405 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1406 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1407 }
1408 if (debug)
1409 pr_debug("src_min set to: %s\n", pkt_dev->src_min);
1410 i += len;
1411 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1412 return count;
1413 }
1414 if (!strcmp(name, "src_max")) {
1415 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1416 if (len < 0)
1417 return len;
1418
1419 if (copy_from_user(buf, &user_buffer[i], len))
1420 return -EFAULT;
1421 buf[len] = 0;
1422 if (strcmp(buf, pkt_dev->src_max) != 0) {
1423 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1424 strncpy(pkt_dev->src_max, buf, len);
1425 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1426 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1427 }
1428 if (debug)
1429 pr_debug("src_max set to: %s\n", pkt_dev->src_max);
1430 i += len;
1431 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1432 return count;
1433 }
1434 if (!strcmp(name, "dst_mac")) {
1435 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1436 if (len < 0)
1437 return len;
1438
1439 memset(valstr, 0, sizeof(valstr));
1440 if (copy_from_user(valstr, &user_buffer[i], len))
1441 return -EFAULT;
1442
1443 if (!mac_pton(valstr, pkt_dev->dst_mac))
1444 return -EINVAL;
1445 /* Set up Dest MAC */
1446 ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac);
1447
1448 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1449 return count;
1450 }
1451 if (!strcmp(name, "src_mac")) {
1452 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1453 if (len < 0)
1454 return len;
1455
1456 memset(valstr, 0, sizeof(valstr));
1457 if (copy_from_user(valstr, &user_buffer[i], len))
1458 return -EFAULT;
1459
1460 if (!mac_pton(valstr, pkt_dev->src_mac))
1461 return -EINVAL;
1462 /* Set up Src MAC */
1463 ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac);
1464
1465 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1466 return count;
1467 }
1468
1469 if (!strcmp(name, "clear_counters")) {
1470 pktgen_clear_counters(pkt_dev);
1471 sprintf(pg_result, "OK: Clearing counters.\n");
1472 return count;
1473 }
1474
1475 if (!strcmp(name, "flows")) {
1476 len = num_arg(&user_buffer[i], 10, &value);
1477 if (len < 0)
1478 return len;
1479
1480 i += len;
1481 if (value > MAX_CFLOWS)
1482 value = MAX_CFLOWS;
1483
1484 pkt_dev->cflows = value;
1485 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1486 return count;
1487 }
1488 #ifdef CONFIG_XFRM
1489 if (!strcmp(name, "spi")) {
1490 len = num_arg(&user_buffer[i], 10, &value);
1491 if (len < 0)
1492 return len;
1493
1494 i += len;
1495 pkt_dev->spi = value;
1496 sprintf(pg_result, "OK: spi=%u", pkt_dev->spi);
1497 return count;
1498 }
1499 #endif
1500 if (!strcmp(name, "flowlen")) {
1501 len = num_arg(&user_buffer[i], 10, &value);
1502 if (len < 0)
1503 return len;
1504
1505 i += len;
1506 pkt_dev->lflow = value;
1507 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1508 return count;
1509 }
1510
1511 if (!strcmp(name, "queue_map_min")) {
1512 len = num_arg(&user_buffer[i], 5, &value);
1513 if (len < 0)
1514 return len;
1515
1516 i += len;
1517 pkt_dev->queue_map_min = value;
1518 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1519 return count;
1520 }
1521
1522 if (!strcmp(name, "queue_map_max")) {
1523 len = num_arg(&user_buffer[i], 5, &value);
1524 if (len < 0)
1525 return len;
1526
1527 i += len;
1528 pkt_dev->queue_map_max = value;
1529 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1530 return count;
1531 }
1532
1533 if (!strcmp(name, "mpls")) {
1534 unsigned int n, cnt;
1535
1536 len = get_labels(&user_buffer[i], pkt_dev);
1537 if (len < 0)
1538 return len;
1539 i += len;
1540 cnt = sprintf(pg_result, "OK: mpls=");
1541 for (n = 0; n < pkt_dev->nr_labels; n++)
1542 cnt += sprintf(pg_result + cnt,
1543 "%08x%s", ntohl(pkt_dev->labels[n]),
1544 n == pkt_dev->nr_labels-1 ? "" : ",");
1545
1546 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1547 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1548 pkt_dev->svlan_id = 0xffff;
1549
1550 if (debug)
1551 pr_debug("VLAN/SVLAN auto turned off\n");
1552 }
1553 return count;
1554 }
1555
1556 if (!strcmp(name, "vlan_id")) {
1557 len = num_arg(&user_buffer[i], 4, &value);
1558 if (len < 0)
1559 return len;
1560
1561 i += len;
1562 if (value <= 4095) {
1563 pkt_dev->vlan_id = value; /* turn on VLAN */
1564
1565 if (debug)
1566 pr_debug("VLAN turned on\n");
1567
1568 if (debug && pkt_dev->nr_labels)
1569 pr_debug("MPLS auto turned off\n");
1570
1571 pkt_dev->nr_labels = 0; /* turn off MPLS */
1572 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1573 } else {
1574 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1575 pkt_dev->svlan_id = 0xffff;
1576
1577 if (debug)
1578 pr_debug("VLAN/SVLAN turned off\n");
1579 }
1580 return count;
1581 }
1582
1583 if (!strcmp(name, "vlan_p")) {
1584 len = num_arg(&user_buffer[i], 1, &value);
1585 if (len < 0)
1586 return len;
1587
1588 i += len;
1589 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1590 pkt_dev->vlan_p = value;
1591 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1592 } else {
1593 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1594 }
1595 return count;
1596 }
1597
1598 if (!strcmp(name, "vlan_cfi")) {
1599 len = num_arg(&user_buffer[i], 1, &value);
1600 if (len < 0)
1601 return len;
1602
1603 i += len;
1604 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1605 pkt_dev->vlan_cfi = value;
1606 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1607 } else {
1608 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1609 }
1610 return count;
1611 }
1612
1613 if (!strcmp(name, "svlan_id")) {
1614 len = num_arg(&user_buffer[i], 4, &value);
1615 if (len < 0)
1616 return len;
1617
1618 i += len;
1619 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1620 pkt_dev->svlan_id = value; /* turn on SVLAN */
1621
1622 if (debug)
1623 pr_debug("SVLAN turned on\n");
1624
1625 if (debug && pkt_dev->nr_labels)
1626 pr_debug("MPLS auto turned off\n");
1627
1628 pkt_dev->nr_labels = 0; /* turn off MPLS */
1629 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1630 } else {
1631 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1632 pkt_dev->svlan_id = 0xffff;
1633
1634 if (debug)
1635 pr_debug("VLAN/SVLAN turned off\n");
1636 }
1637 return count;
1638 }
1639
1640 if (!strcmp(name, "svlan_p")) {
1641 len = num_arg(&user_buffer[i], 1, &value);
1642 if (len < 0)
1643 return len;
1644
1645 i += len;
1646 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1647 pkt_dev->svlan_p = value;
1648 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1649 } else {
1650 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1651 }
1652 return count;
1653 }
1654
1655 if (!strcmp(name, "svlan_cfi")) {
1656 len = num_arg(&user_buffer[i], 1, &value);
1657 if (len < 0)
1658 return len;
1659
1660 i += len;
1661 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1662 pkt_dev->svlan_cfi = value;
1663 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1664 } else {
1665 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1666 }
1667 return count;
1668 }
1669
1670 if (!strcmp(name, "tos")) {
1671 __u32 tmp_value = 0;
1672 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1673 if (len < 0)
1674 return len;
1675
1676 i += len;
1677 if (len == 2) {
1678 pkt_dev->tos = tmp_value;
1679 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1680 } else {
1681 sprintf(pg_result, "ERROR: tos must be 00-ff");
1682 }
1683 return count;
1684 }
1685
1686 if (!strcmp(name, "traffic_class")) {
1687 __u32 tmp_value = 0;
1688 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1689 if (len < 0)
1690 return len;
1691
1692 i += len;
1693 if (len == 2) {
1694 pkt_dev->traffic_class = tmp_value;
1695 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1696 } else {
1697 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1698 }
1699 return count;
1700 }
1701
1702 if (!strcmp(name, "skb_priority")) {
1703 len = num_arg(&user_buffer[i], 9, &value);
1704 if (len < 0)
1705 return len;
1706
1707 i += len;
1708 pkt_dev->skb_priority = value;
1709 sprintf(pg_result, "OK: skb_priority=%i",
1710 pkt_dev->skb_priority);
1711 return count;
1712 }
1713
1714 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1715 return -EINVAL;
1716 }
1717
1718 static int pktgen_if_open(struct inode *inode, struct file *file)
1719 {
1720 return single_open(file, pktgen_if_show, PDE_DATA(inode));
1721 }
1722
1723 static const struct file_operations pktgen_if_fops = {
1724 .owner = THIS_MODULE,
1725 .open = pktgen_if_open,
1726 .read = seq_read,
1727 .llseek = seq_lseek,
1728 .write = pktgen_if_write,
1729 .release = single_release,
1730 };
1731
1732 static int pktgen_thread_show(struct seq_file *seq, void *v)
1733 {
1734 struct pktgen_thread *t = seq->private;
1735 const struct pktgen_dev *pkt_dev;
1736
1737 BUG_ON(!t);
1738
1739 seq_puts(seq, "Running: ");
1740
1741 rcu_read_lock();
1742 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1743 if (pkt_dev->running)
1744 seq_printf(seq, "%s ", pkt_dev->odevname);
1745
1746 seq_puts(seq, "\nStopped: ");
1747
1748 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1749 if (!pkt_dev->running)
1750 seq_printf(seq, "%s ", pkt_dev->odevname);
1751
1752 if (t->result[0])
1753 seq_printf(seq, "\nResult: %s\n", t->result);
1754 else
1755 seq_puts(seq, "\nResult: NA\n");
1756
1757 rcu_read_unlock();
1758
1759 return 0;
1760 }
1761
1762 static ssize_t pktgen_thread_write(struct file *file,
1763 const char __user * user_buffer,
1764 size_t count, loff_t * offset)
1765 {
1766 struct seq_file *seq = file->private_data;
1767 struct pktgen_thread *t = seq->private;
1768 int i, max, len, ret;
1769 char name[40];
1770 char *pg_result;
1771
1772 if (count < 1) {
1773 // sprintf(pg_result, "Wrong command format");
1774 return -EINVAL;
1775 }
1776
1777 max = count;
1778 len = count_trail_chars(user_buffer, max);
1779 if (len < 0)
1780 return len;
1781
1782 i = len;
1783
1784 /* Read variable name */
1785
1786 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1787 if (len < 0)
1788 return len;
1789
1790 memset(name, 0, sizeof(name));
1791 if (copy_from_user(name, &user_buffer[i], len))
1792 return -EFAULT;
1793 i += len;
1794
1795 max = count - i;
1796 len = count_trail_chars(&user_buffer[i], max);
1797 if (len < 0)
1798 return len;
1799
1800 i += len;
1801
1802 if (debug)
1803 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
1804
1805 if (!t) {
1806 pr_err("ERROR: No thread\n");
1807 ret = -EINVAL;
1808 goto out;
1809 }
1810
1811 pg_result = &(t->result[0]);
1812
1813 if (!strcmp(name, "add_device")) {
1814 char f[32];
1815 memset(f, 0, 32);
1816 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1817 if (len < 0) {
1818 ret = len;
1819 goto out;
1820 }
1821 if (copy_from_user(f, &user_buffer[i], len))
1822 return -EFAULT;
1823 i += len;
1824 mutex_lock(&pktgen_thread_lock);
1825 ret = pktgen_add_device(t, f);
1826 mutex_unlock(&pktgen_thread_lock);
1827 if (!ret) {
1828 ret = count;
1829 sprintf(pg_result, "OK: add_device=%s", f);
1830 } else
1831 sprintf(pg_result, "ERROR: can not add device %s", f);
1832 goto out;
1833 }
1834
1835 if (!strcmp(name, "rem_device_all")) {
1836 mutex_lock(&pktgen_thread_lock);
1837 t->control |= T_REMDEVALL;
1838 mutex_unlock(&pktgen_thread_lock);
1839 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1840 ret = count;
1841 sprintf(pg_result, "OK: rem_device_all");
1842 goto out;
1843 }
1844
1845 if (!strcmp(name, "max_before_softirq")) {
1846 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1847 ret = count;
1848 goto out;
1849 }
1850
1851 ret = -EINVAL;
1852 out:
1853 return ret;
1854 }
1855
1856 static int pktgen_thread_open(struct inode *inode, struct file *file)
1857 {
1858 return single_open(file, pktgen_thread_show, PDE_DATA(inode));
1859 }
1860
1861 static const struct file_operations pktgen_thread_fops = {
1862 .owner = THIS_MODULE,
1863 .open = pktgen_thread_open,
1864 .read = seq_read,
1865 .llseek = seq_lseek,
1866 .write = pktgen_thread_write,
1867 .release = single_release,
1868 };
1869
1870 /* Think find or remove for NN */
1871 static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn,
1872 const char *ifname, int remove)
1873 {
1874 struct pktgen_thread *t;
1875 struct pktgen_dev *pkt_dev = NULL;
1876 bool exact = (remove == FIND);
1877
1878 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1879 pkt_dev = pktgen_find_dev(t, ifname, exact);
1880 if (pkt_dev) {
1881 if (remove) {
1882 pkt_dev->removal_mark = 1;
1883 t->control |= T_REMDEV;
1884 }
1885 break;
1886 }
1887 }
1888 return pkt_dev;
1889 }
1890
1891 /*
1892 * mark a device for removal
1893 */
1894 static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname)
1895 {
1896 struct pktgen_dev *pkt_dev = NULL;
1897 const int max_tries = 10, msec_per_try = 125;
1898 int i = 0;
1899
1900 mutex_lock(&pktgen_thread_lock);
1901 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1902
1903 while (1) {
1904
1905 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE);
1906 if (pkt_dev == NULL)
1907 break; /* success */
1908
1909 mutex_unlock(&pktgen_thread_lock);
1910 pr_debug("%s: waiting for %s to disappear....\n",
1911 __func__, ifname);
1912 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1913 mutex_lock(&pktgen_thread_lock);
1914
1915 if (++i >= max_tries) {
1916 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1917 __func__, msec_per_try * i, ifname);
1918 break;
1919 }
1920
1921 }
1922
1923 mutex_unlock(&pktgen_thread_lock);
1924 }
1925
1926 static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev)
1927 {
1928 struct pktgen_thread *t;
1929
1930 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1931 struct pktgen_dev *pkt_dev;
1932
1933 rcu_read_lock();
1934 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
1935 if (pkt_dev->odev != dev)
1936 continue;
1937
1938 proc_remove(pkt_dev->entry);
1939
1940 pkt_dev->entry = proc_create_data(dev->name, 0600,
1941 pn->proc_dir,
1942 &pktgen_if_fops,
1943 pkt_dev);
1944 if (!pkt_dev->entry)
1945 pr_err("can't move proc entry for '%s'\n",
1946 dev->name);
1947 break;
1948 }
1949 rcu_read_unlock();
1950 }
1951 }
1952
1953 static int pktgen_device_event(struct notifier_block *unused,
1954 unsigned long event, void *ptr)
1955 {
1956 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1957 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id);
1958
1959 if (pn->pktgen_exiting)
1960 return NOTIFY_DONE;
1961
1962 /* It is OK that we do not hold the group lock right now,
1963 * as we run under the RTNL lock.
1964 */
1965
1966 switch (event) {
1967 case NETDEV_CHANGENAME:
1968 pktgen_change_name(pn, dev);
1969 break;
1970
1971 case NETDEV_UNREGISTER:
1972 pktgen_mark_device(pn, dev->name);
1973 break;
1974 }
1975
1976 return NOTIFY_DONE;
1977 }
1978
1979 static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn,
1980 struct pktgen_dev *pkt_dev,
1981 const char *ifname)
1982 {
1983 char b[IFNAMSIZ+5];
1984 int i;
1985
1986 for (i = 0; ifname[i] != '@'; i++) {
1987 if (i == IFNAMSIZ)
1988 break;
1989
1990 b[i] = ifname[i];
1991 }
1992 b[i] = 0;
1993
1994 return dev_get_by_name(pn->net, b);
1995 }
1996
1997
1998 /* Associate pktgen_dev with a device. */
1999
2000 static int pktgen_setup_dev(const struct pktgen_net *pn,
2001 struct pktgen_dev *pkt_dev, const char *ifname)
2002 {
2003 struct net_device *odev;
2004 int err;
2005
2006 /* Clean old setups */
2007 if (pkt_dev->odev) {
2008 dev_put(pkt_dev->odev);
2009 pkt_dev->odev = NULL;
2010 }
2011
2012 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname);
2013 if (!odev) {
2014 pr_err("no such netdevice: \"%s\"\n", ifname);
2015 return -ENODEV;
2016 }
2017
2018 if (odev->type != ARPHRD_ETHER) {
2019 pr_err("not an ethernet device: \"%s\"\n", ifname);
2020 err = -EINVAL;
2021 } else if (!netif_running(odev)) {
2022 pr_err("device is down: \"%s\"\n", ifname);
2023 err = -ENETDOWN;
2024 } else {
2025 pkt_dev->odev = odev;
2026 return 0;
2027 }
2028
2029 dev_put(odev);
2030 return err;
2031 }
2032
2033 /* Read pkt_dev from the interface and set up internal pktgen_dev
2034 * structure to have the right information to create/send packets
2035 */
2036 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2037 {
2038 int ntxq;
2039
2040 if (!pkt_dev->odev) {
2041 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2042 sprintf(pkt_dev->result,
2043 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2044 return;
2045 }
2046
2047 /* make sure that we don't pick a non-existing transmit queue */
2048 ntxq = pkt_dev->odev->real_num_tx_queues;
2049
2050 if (ntxq <= pkt_dev->queue_map_min) {
2051 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2052 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2053 pkt_dev->odevname);
2054 pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2055 }
2056 if (pkt_dev->queue_map_max >= ntxq) {
2057 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2058 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2059 pkt_dev->odevname);
2060 pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2061 }
2062
2063 /* Default to the interface's mac if not explicitly set. */
2064
2065 if (is_zero_ether_addr(pkt_dev->src_mac))
2066 ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr);
2067
2068 /* Set up Dest MAC */
2069 ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac);
2070
2071 if (pkt_dev->flags & F_IPV6) {
2072 int i, set = 0, err = 1;
2073 struct inet6_dev *idev;
2074
2075 if (pkt_dev->min_pkt_size == 0) {
2076 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
2077 + sizeof(struct udphdr)
2078 + sizeof(struct pktgen_hdr)
2079 + pkt_dev->pkt_overhead;
2080 }
2081
2082 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2083 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2084 set = 1;
2085 break;
2086 }
2087
2088 if (!set) {
2089
2090 /*
2091 * Use linklevel address if unconfigured.
2092 *
2093 * use ipv6_get_lladdr if/when it's get exported
2094 */
2095
2096 rcu_read_lock();
2097 idev = __in6_dev_get(pkt_dev->odev);
2098 if (idev) {
2099 struct inet6_ifaddr *ifp;
2100
2101 read_lock_bh(&idev->lock);
2102 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2103 if ((ifp->scope & IFA_LINK) &&
2104 !(ifp->flags & IFA_F_TENTATIVE)) {
2105 pkt_dev->cur_in6_saddr = ifp->addr;
2106 err = 0;
2107 break;
2108 }
2109 }
2110 read_unlock_bh(&idev->lock);
2111 }
2112 rcu_read_unlock();
2113 if (err)
2114 pr_err("ERROR: IPv6 link address not available\n");
2115 }
2116 } else {
2117 if (pkt_dev->min_pkt_size == 0) {
2118 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
2119 + sizeof(struct udphdr)
2120 + sizeof(struct pktgen_hdr)
2121 + pkt_dev->pkt_overhead;
2122 }
2123
2124 pkt_dev->saddr_min = 0;
2125 pkt_dev->saddr_max = 0;
2126 if (strlen(pkt_dev->src_min) == 0) {
2127
2128 struct in_device *in_dev;
2129
2130 rcu_read_lock();
2131 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2132 if (in_dev) {
2133 if (in_dev->ifa_list) {
2134 pkt_dev->saddr_min =
2135 in_dev->ifa_list->ifa_address;
2136 pkt_dev->saddr_max = pkt_dev->saddr_min;
2137 }
2138 }
2139 rcu_read_unlock();
2140 } else {
2141 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2142 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2143 }
2144
2145 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2146 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2147 }
2148 /* Initialize current values. */
2149 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2150 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
2151 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
2152
2153 pkt_dev->cur_dst_mac_offset = 0;
2154 pkt_dev->cur_src_mac_offset = 0;
2155 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2156 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2157 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2158 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2159 pkt_dev->nflows = 0;
2160 }
2161
2162
2163 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2164 {
2165 ktime_t start_time, end_time;
2166 s64 remaining;
2167 struct hrtimer_sleeper t;
2168
2169 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2170 hrtimer_set_expires(&t.timer, spin_until);
2171
2172 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2173 if (remaining <= 0) {
2174 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2175 return;
2176 }
2177
2178 start_time = ktime_get();
2179 if (remaining < 100000) {
2180 /* for small delays (<100us), just loop until limit is reached */
2181 do {
2182 end_time = ktime_get();
2183 } while (ktime_compare(end_time, spin_until) < 0);
2184 } else {
2185 /* see do_nanosleep */
2186 hrtimer_init_sleeper(&t, current);
2187 do {
2188 set_current_state(TASK_INTERRUPTIBLE);
2189 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2190 if (!hrtimer_active(&t.timer))
2191 t.task = NULL;
2192
2193 if (likely(t.task))
2194 schedule();
2195
2196 hrtimer_cancel(&t.timer);
2197 } while (t.task && pkt_dev->running && !signal_pending(current));
2198 __set_current_state(TASK_RUNNING);
2199 end_time = ktime_get();
2200 }
2201
2202 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2203 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2204 }
2205
2206 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2207 {
2208 pkt_dev->pkt_overhead = 0;
2209 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2210 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2211 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2212 }
2213
2214 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2215 {
2216 return !!(pkt_dev->flows[flow].flags & F_INIT);
2217 }
2218
2219 static inline int f_pick(struct pktgen_dev *pkt_dev)
2220 {
2221 int flow = pkt_dev->curfl;
2222
2223 if (pkt_dev->flags & F_FLOW_SEQ) {
2224 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2225 /* reset time */
2226 pkt_dev->flows[flow].count = 0;
2227 pkt_dev->flows[flow].flags = 0;
2228 pkt_dev->curfl += 1;
2229 if (pkt_dev->curfl >= pkt_dev->cflows)
2230 pkt_dev->curfl = 0; /*reset */
2231 }
2232 } else {
2233 flow = prandom_u32() % pkt_dev->cflows;
2234 pkt_dev->curfl = flow;
2235
2236 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2237 pkt_dev->flows[flow].count = 0;
2238 pkt_dev->flows[flow].flags = 0;
2239 }
2240 }
2241
2242 return pkt_dev->curfl;
2243 }
2244
2245
2246 #ifdef CONFIG_XFRM
2247 /* If there was already an IPSEC SA, we keep it as is, else
2248 * we go look for it ...
2249 */
2250 #define DUMMY_MARK 0
2251 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2252 {
2253 struct xfrm_state *x = pkt_dev->flows[flow].x;
2254 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
2255 if (!x) {
2256
2257 if (pkt_dev->spi) {
2258 /* We need as quick as possible to find the right SA
2259 * Searching with minimum criteria to archieve this.
2260 */
2261 x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET);
2262 } else {
2263 /* slow path: we dont already have xfrm_state */
2264 x = xfrm_stateonly_find(pn->net, DUMMY_MARK,
2265 (xfrm_address_t *)&pkt_dev->cur_daddr,
2266 (xfrm_address_t *)&pkt_dev->cur_saddr,
2267 AF_INET,
2268 pkt_dev->ipsmode,
2269 pkt_dev->ipsproto, 0);
2270 }
2271 if (x) {
2272 pkt_dev->flows[flow].x = x;
2273 set_pkt_overhead(pkt_dev);
2274 pkt_dev->pkt_overhead += x->props.header_len;
2275 }
2276
2277 }
2278 }
2279 #endif
2280 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2281 {
2282
2283 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2284 pkt_dev->cur_queue_map = smp_processor_id();
2285
2286 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2287 __u16 t;
2288 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2289 t = prandom_u32() %
2290 (pkt_dev->queue_map_max -
2291 pkt_dev->queue_map_min + 1)
2292 + pkt_dev->queue_map_min;
2293 } else {
2294 t = pkt_dev->cur_queue_map + 1;
2295 if (t > pkt_dev->queue_map_max)
2296 t = pkt_dev->queue_map_min;
2297 }
2298 pkt_dev->cur_queue_map = t;
2299 }
2300 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2301 }
2302
2303 /* Increment/randomize headers according to flags and current values
2304 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2305 */
2306 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2307 {
2308 __u32 imn;
2309 __u32 imx;
2310 int flow = 0;
2311
2312 if (pkt_dev->cflows)
2313 flow = f_pick(pkt_dev);
2314
2315 /* Deal with source MAC */
2316 if (pkt_dev->src_mac_count > 1) {
2317 __u32 mc;
2318 __u32 tmp;
2319
2320 if (pkt_dev->flags & F_MACSRC_RND)
2321 mc = prandom_u32() % pkt_dev->src_mac_count;
2322 else {
2323 mc = pkt_dev->cur_src_mac_offset++;
2324 if (pkt_dev->cur_src_mac_offset >=
2325 pkt_dev->src_mac_count)
2326 pkt_dev->cur_src_mac_offset = 0;
2327 }
2328
2329 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2330 pkt_dev->hh[11] = tmp;
2331 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2332 pkt_dev->hh[10] = tmp;
2333 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2334 pkt_dev->hh[9] = tmp;
2335 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2336 pkt_dev->hh[8] = tmp;
2337 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2338 pkt_dev->hh[7] = tmp;
2339 }
2340
2341 /* Deal with Destination MAC */
2342 if (pkt_dev->dst_mac_count > 1) {
2343 __u32 mc;
2344 __u32 tmp;
2345
2346 if (pkt_dev->flags & F_MACDST_RND)
2347 mc = prandom_u32() % pkt_dev->dst_mac_count;
2348
2349 else {
2350 mc = pkt_dev->cur_dst_mac_offset++;
2351 if (pkt_dev->cur_dst_mac_offset >=
2352 pkt_dev->dst_mac_count) {
2353 pkt_dev->cur_dst_mac_offset = 0;
2354 }
2355 }
2356
2357 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2358 pkt_dev->hh[5] = tmp;
2359 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2360 pkt_dev->hh[4] = tmp;
2361 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2362 pkt_dev->hh[3] = tmp;
2363 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2364 pkt_dev->hh[2] = tmp;
2365 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2366 pkt_dev->hh[1] = tmp;
2367 }
2368
2369 if (pkt_dev->flags & F_MPLS_RND) {
2370 unsigned int i;
2371 for (i = 0; i < pkt_dev->nr_labels; i++)
2372 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2373 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2374 ((__force __be32)prandom_u32() &
2375 htonl(0x000fffff));
2376 }
2377
2378 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2379 pkt_dev->vlan_id = prandom_u32() & (4096 - 1);
2380 }
2381
2382 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2383 pkt_dev->svlan_id = prandom_u32() & (4096 - 1);
2384 }
2385
2386 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2387 if (pkt_dev->flags & F_UDPSRC_RND)
2388 pkt_dev->cur_udp_src = prandom_u32() %
2389 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2390 + pkt_dev->udp_src_min;
2391
2392 else {
2393 pkt_dev->cur_udp_src++;
2394 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2395 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2396 }
2397 }
2398
2399 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2400 if (pkt_dev->flags & F_UDPDST_RND) {
2401 pkt_dev->cur_udp_dst = prandom_u32() %
2402 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2403 + pkt_dev->udp_dst_min;
2404 } else {
2405 pkt_dev->cur_udp_dst++;
2406 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2407 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2408 }
2409 }
2410
2411 if (!(pkt_dev->flags & F_IPV6)) {
2412
2413 imn = ntohl(pkt_dev->saddr_min);
2414 imx = ntohl(pkt_dev->saddr_max);
2415 if (imn < imx) {
2416 __u32 t;
2417 if (pkt_dev->flags & F_IPSRC_RND)
2418 t = prandom_u32() % (imx - imn) + imn;
2419 else {
2420 t = ntohl(pkt_dev->cur_saddr);
2421 t++;
2422 if (t > imx)
2423 t = imn;
2424
2425 }
2426 pkt_dev->cur_saddr = htonl(t);
2427 }
2428
2429 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2430 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2431 } else {
2432 imn = ntohl(pkt_dev->daddr_min);
2433 imx = ntohl(pkt_dev->daddr_max);
2434 if (imn < imx) {
2435 __u32 t;
2436 __be32 s;
2437 if (pkt_dev->flags & F_IPDST_RND) {
2438
2439 do {
2440 t = prandom_u32() %
2441 (imx - imn) + imn;
2442 s = htonl(t);
2443 } while (ipv4_is_loopback(s) ||
2444 ipv4_is_multicast(s) ||
2445 ipv4_is_lbcast(s) ||
2446 ipv4_is_zeronet(s) ||
2447 ipv4_is_local_multicast(s));
2448 pkt_dev->cur_daddr = s;
2449 } else {
2450 t = ntohl(pkt_dev->cur_daddr);
2451 t++;
2452 if (t > imx) {
2453 t = imn;
2454 }
2455 pkt_dev->cur_daddr = htonl(t);
2456 }
2457 }
2458 if (pkt_dev->cflows) {
2459 pkt_dev->flows[flow].flags |= F_INIT;
2460 pkt_dev->flows[flow].cur_daddr =
2461 pkt_dev->cur_daddr;
2462 #ifdef CONFIG_XFRM
2463 if (pkt_dev->flags & F_IPSEC_ON)
2464 get_ipsec_sa(pkt_dev, flow);
2465 #endif
2466 pkt_dev->nflows++;
2467 }
2468 }
2469 } else { /* IPV6 * */
2470
2471 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
2472 int i;
2473
2474 /* Only random destinations yet */
2475
2476 for (i = 0; i < 4; i++) {
2477 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2478 (((__force __be32)prandom_u32() |
2479 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2480 pkt_dev->max_in6_daddr.s6_addr32[i]);
2481 }
2482 }
2483 }
2484
2485 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2486 __u32 t;
2487 if (pkt_dev->flags & F_TXSIZE_RND) {
2488 t = prandom_u32() %
2489 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2490 + pkt_dev->min_pkt_size;
2491 } else {
2492 t = pkt_dev->cur_pkt_size + 1;
2493 if (t > pkt_dev->max_pkt_size)
2494 t = pkt_dev->min_pkt_size;
2495 }
2496 pkt_dev->cur_pkt_size = t;
2497 }
2498
2499 set_cur_queue_map(pkt_dev);
2500
2501 pkt_dev->flows[flow].count++;
2502 }
2503
2504
2505 #ifdef CONFIG_XFRM
2506 static u32 pktgen_dst_metrics[RTAX_MAX + 1] = {
2507
2508 [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */
2509 };
2510
2511 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2512 {
2513 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2514 int err = 0;
2515 struct net *net = dev_net(pkt_dev->odev);
2516
2517 if (!x)
2518 return 0;
2519 /* XXX: we dont support tunnel mode for now until
2520 * we resolve the dst issue */
2521 if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0))
2522 return 0;
2523
2524 /* But when user specify an valid SPI, transformation
2525 * supports both transport/tunnel mode + ESP/AH type.
2526 */
2527 if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0))
2528 skb->_skb_refdst = (unsigned long)&pkt_dev->dst | SKB_DST_NOREF;
2529
2530 rcu_read_lock_bh();
2531 err = x->outer_mode->output(x, skb);
2532 rcu_read_unlock_bh();
2533 if (err) {
2534 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR);
2535 goto error;
2536 }
2537 err = x->type->output(x, skb);
2538 if (err) {
2539 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR);
2540 goto error;
2541 }
2542 spin_lock_bh(&x->lock);
2543 x->curlft.bytes += skb->len;
2544 x->curlft.packets++;
2545 spin_unlock_bh(&x->lock);
2546 error:
2547 return err;
2548 }
2549
2550 static void free_SAs(struct pktgen_dev *pkt_dev)
2551 {
2552 if (pkt_dev->cflows) {
2553 /* let go of the SAs if we have them */
2554 int i;
2555 for (i = 0; i < pkt_dev->cflows; i++) {
2556 struct xfrm_state *x = pkt_dev->flows[i].x;
2557 if (x) {
2558 xfrm_state_put(x);
2559 pkt_dev->flows[i].x = NULL;
2560 }
2561 }
2562 }
2563 }
2564
2565 static int process_ipsec(struct pktgen_dev *pkt_dev,
2566 struct sk_buff *skb, __be16 protocol)
2567 {
2568 if (pkt_dev->flags & F_IPSEC_ON) {
2569 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2570 int nhead = 0;
2571 if (x) {
2572 int ret;
2573 __u8 *eth;
2574 struct iphdr *iph;
2575
2576 nhead = x->props.header_len - skb_headroom(skb);
2577 if (nhead > 0) {
2578 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2579 if (ret < 0) {
2580 pr_err("Error expanding ipsec packet %d\n",
2581 ret);
2582 goto err;
2583 }
2584 }
2585
2586 /* ipsec is not expecting ll header */
2587 skb_pull(skb, ETH_HLEN);
2588 ret = pktgen_output_ipsec(skb, pkt_dev);
2589 if (ret) {
2590 pr_err("Error creating ipsec packet %d\n", ret);
2591 goto err;
2592 }
2593 /* restore ll */
2594 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2595 memcpy(eth, pkt_dev->hh, 12);
2596 *(u16 *) &eth[12] = protocol;
2597
2598 /* Update IPv4 header len as well as checksum value */
2599 iph = ip_hdr(skb);
2600 iph->tot_len = htons(skb->len - ETH_HLEN);
2601 ip_send_check(iph);
2602 }
2603 }
2604 return 1;
2605 err:
2606 kfree_skb(skb);
2607 return 0;
2608 }
2609 #endif
2610
2611 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2612 {
2613 unsigned int i;
2614 for (i = 0; i < pkt_dev->nr_labels; i++)
2615 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2616
2617 mpls--;
2618 *mpls |= MPLS_STACK_BOTTOM;
2619 }
2620
2621 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2622 unsigned int prio)
2623 {
2624 return htons(id | (cfi << 12) | (prio << 13));
2625 }
2626
2627 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2628 int datalen)
2629 {
2630 struct timeval timestamp;
2631 struct pktgen_hdr *pgh;
2632
2633 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
2634 datalen -= sizeof(*pgh);
2635
2636 if (pkt_dev->nfrags <= 0) {
2637 memset(skb_put(skb, datalen), 0, datalen);
2638 } else {
2639 int frags = pkt_dev->nfrags;
2640 int i, len;
2641 int frag_len;
2642
2643
2644 if (frags > MAX_SKB_FRAGS)
2645 frags = MAX_SKB_FRAGS;
2646 len = datalen - frags * PAGE_SIZE;
2647 if (len > 0) {
2648 memset(skb_put(skb, len), 0, len);
2649 datalen = frags * PAGE_SIZE;
2650 }
2651
2652 i = 0;
2653 frag_len = (datalen/frags) < PAGE_SIZE ?
2654 (datalen/frags) : PAGE_SIZE;
2655 while (datalen > 0) {
2656 if (unlikely(!pkt_dev->page)) {
2657 int node = numa_node_id();
2658
2659 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2660 node = pkt_dev->node;
2661 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2662 if (!pkt_dev->page)
2663 break;
2664 }
2665 get_page(pkt_dev->page);
2666 skb_frag_set_page(skb, i, pkt_dev->page);
2667 skb_shinfo(skb)->frags[i].page_offset = 0;
2668 /*last fragment, fill rest of data*/
2669 if (i == (frags - 1))
2670 skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2671 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2672 else
2673 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2674 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2675 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2676 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2677 i++;
2678 skb_shinfo(skb)->nr_frags = i;
2679 }
2680 }
2681
2682 /* Stamp the time, and sequence number,
2683 * convert them to network byte order
2684 */
2685 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2686 pgh->seq_num = htonl(pkt_dev->seq_num);
2687
2688 do_gettimeofday(&timestamp);
2689 pgh->tv_sec = htonl(timestamp.tv_sec);
2690 pgh->tv_usec = htonl(timestamp.tv_usec);
2691 }
2692
2693 static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
2694 struct pktgen_dev *pkt_dev,
2695 unsigned int extralen)
2696 {
2697 struct sk_buff *skb = NULL;
2698 unsigned int size = pkt_dev->cur_pkt_size + 64 + extralen +
2699 pkt_dev->pkt_overhead;
2700
2701 if (pkt_dev->flags & F_NODE) {
2702 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id();
2703
2704 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node);
2705 if (likely(skb)) {
2706 skb_reserve(skb, NET_SKB_PAD);
2707 skb->dev = dev;
2708 }
2709 } else {
2710 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
2711 }
2712
2713 return skb;
2714 }
2715
2716 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2717 struct pktgen_dev *pkt_dev)
2718 {
2719 struct sk_buff *skb = NULL;
2720 __u8 *eth;
2721 struct udphdr *udph;
2722 int datalen, iplen;
2723 struct iphdr *iph;
2724 __be16 protocol = htons(ETH_P_IP);
2725 __be32 *mpls;
2726 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2727 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2728 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2729 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2730 u16 queue_map;
2731
2732 if (pkt_dev->nr_labels)
2733 protocol = htons(ETH_P_MPLS_UC);
2734
2735 if (pkt_dev->vlan_id != 0xffff)
2736 protocol = htons(ETH_P_8021Q);
2737
2738 /* Update any of the values, used when we're incrementing various
2739 * fields.
2740 */
2741 mod_cur_headers(pkt_dev);
2742 queue_map = pkt_dev->cur_queue_map;
2743
2744 datalen = (odev->hard_header_len + 16) & ~0xf;
2745
2746 skb = pktgen_alloc_skb(odev, pkt_dev, datalen);
2747 if (!skb) {
2748 sprintf(pkt_dev->result, "No memory");
2749 return NULL;
2750 }
2751
2752 prefetchw(skb->data);
2753 skb_reserve(skb, datalen);
2754
2755 /* Reserve for ethernet and IP header */
2756 eth = (__u8 *) skb_push(skb, 14);
2757 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2758 if (pkt_dev->nr_labels)
2759 mpls_push(mpls, pkt_dev);
2760
2761 if (pkt_dev->vlan_id != 0xffff) {
2762 if (pkt_dev->svlan_id != 0xffff) {
2763 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2764 *svlan_tci = build_tci(pkt_dev->svlan_id,
2765 pkt_dev->svlan_cfi,
2766 pkt_dev->svlan_p);
2767 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2768 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2769 }
2770 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2771 *vlan_tci = build_tci(pkt_dev->vlan_id,
2772 pkt_dev->vlan_cfi,
2773 pkt_dev->vlan_p);
2774 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2775 *vlan_encapsulated_proto = htons(ETH_P_IP);
2776 }
2777
2778 skb_set_mac_header(skb, 0);
2779 skb_set_network_header(skb, skb->len);
2780 iph = (struct iphdr *) skb_put(skb, sizeof(struct iphdr));
2781
2782 skb_set_transport_header(skb, skb->len);
2783 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2784 skb_set_queue_mapping(skb, queue_map);
2785 skb->priority = pkt_dev->skb_priority;
2786
2787 memcpy(eth, pkt_dev->hh, 12);
2788 *(__be16 *) & eth[12] = protocol;
2789
2790 /* Eth + IPh + UDPh + mpls */
2791 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2792 pkt_dev->pkt_overhead;
2793 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
2794 datalen = sizeof(struct pktgen_hdr);
2795
2796 udph->source = htons(pkt_dev->cur_udp_src);
2797 udph->dest = htons(pkt_dev->cur_udp_dst);
2798 udph->len = htons(datalen + 8); /* DATA + udphdr */
2799 udph->check = 0;
2800
2801 iph->ihl = 5;
2802 iph->version = 4;
2803 iph->ttl = 32;
2804 iph->tos = pkt_dev->tos;
2805 iph->protocol = IPPROTO_UDP; /* UDP */
2806 iph->saddr = pkt_dev->cur_saddr;
2807 iph->daddr = pkt_dev->cur_daddr;
2808 iph->id = htons(pkt_dev->ip_id);
2809 pkt_dev->ip_id++;
2810 iph->frag_off = 0;
2811 iplen = 20 + 8 + datalen;
2812 iph->tot_len = htons(iplen);
2813 ip_send_check(iph);
2814 skb->protocol = protocol;
2815 skb->dev = odev;
2816 skb->pkt_type = PACKET_HOST;
2817
2818 if (!(pkt_dev->flags & F_UDPCSUM)) {
2819 skb->ip_summed = CHECKSUM_NONE;
2820 } else if (odev->features & NETIF_F_V4_CSUM) {
2821 skb->ip_summed = CHECKSUM_PARTIAL;
2822 skb->csum = 0;
2823 udp4_hwcsum(skb, udph->source, udph->dest);
2824 } else {
2825 __wsum csum = udp_csum(skb);
2826
2827 /* add protocol-dependent pseudo-header */
2828 udph->check = csum_tcpudp_magic(udph->source, udph->dest,
2829 datalen + 8, IPPROTO_UDP, csum);
2830
2831 if (udph->check == 0)
2832 udph->check = CSUM_MANGLED_0;
2833 }
2834
2835 pktgen_finalize_skb(pkt_dev, skb, datalen);
2836
2837 #ifdef CONFIG_XFRM
2838 if (!process_ipsec(pkt_dev, skb, protocol))
2839 return NULL;
2840 #endif
2841
2842 return skb;
2843 }
2844
2845 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2846 struct pktgen_dev *pkt_dev)
2847 {
2848 struct sk_buff *skb = NULL;
2849 __u8 *eth;
2850 struct udphdr *udph;
2851 int datalen, udplen;
2852 struct ipv6hdr *iph;
2853 __be16 protocol = htons(ETH_P_IPV6);
2854 __be32 *mpls;
2855 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2856 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2857 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2858 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2859 u16 queue_map;
2860
2861 if (pkt_dev->nr_labels)
2862 protocol = htons(ETH_P_MPLS_UC);
2863
2864 if (pkt_dev->vlan_id != 0xffff)
2865 protocol = htons(ETH_P_8021Q);
2866
2867 /* Update any of the values, used when we're incrementing various
2868 * fields.
2869 */
2870 mod_cur_headers(pkt_dev);
2871 queue_map = pkt_dev->cur_queue_map;
2872
2873 skb = pktgen_alloc_skb(odev, pkt_dev, 16);
2874 if (!skb) {
2875 sprintf(pkt_dev->result, "No memory");
2876 return NULL;
2877 }
2878
2879 prefetchw(skb->data);
2880 skb_reserve(skb, 16);
2881
2882 /* Reserve for ethernet and IP header */
2883 eth = (__u8 *) skb_push(skb, 14);
2884 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2885 if (pkt_dev->nr_labels)
2886 mpls_push(mpls, pkt_dev);
2887
2888 if (pkt_dev->vlan_id != 0xffff) {
2889 if (pkt_dev->svlan_id != 0xffff) {
2890 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2891 *svlan_tci = build_tci(pkt_dev->svlan_id,
2892 pkt_dev->svlan_cfi,
2893 pkt_dev->svlan_p);
2894 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2895 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2896 }
2897 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2898 *vlan_tci = build_tci(pkt_dev->vlan_id,
2899 pkt_dev->vlan_cfi,
2900 pkt_dev->vlan_p);
2901 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2902 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2903 }
2904
2905 skb_set_mac_header(skb, 0);
2906 skb_set_network_header(skb, skb->len);
2907 iph = (struct ipv6hdr *) skb_put(skb, sizeof(struct ipv6hdr));
2908
2909 skb_set_transport_header(skb, skb->len);
2910 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2911 skb_set_queue_mapping(skb, queue_map);
2912 skb->priority = pkt_dev->skb_priority;
2913
2914 memcpy(eth, pkt_dev->hh, 12);
2915 *(__be16 *) &eth[12] = protocol;
2916
2917 /* Eth + IPh + UDPh + mpls */
2918 datalen = pkt_dev->cur_pkt_size - 14 -
2919 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2920 pkt_dev->pkt_overhead;
2921
2922 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
2923 datalen = sizeof(struct pktgen_hdr);
2924 net_info_ratelimited("increased datalen to %d\n", datalen);
2925 }
2926
2927 udplen = datalen + sizeof(struct udphdr);
2928 udph->source = htons(pkt_dev->cur_udp_src);
2929 udph->dest = htons(pkt_dev->cur_udp_dst);
2930 udph->len = htons(udplen);
2931 udph->check = 0;
2932
2933 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2934
2935 if (pkt_dev->traffic_class) {
2936 /* Version + traffic class + flow (0) */
2937 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2938 }
2939
2940 iph->hop_limit = 32;
2941
2942 iph->payload_len = htons(udplen);
2943 iph->nexthdr = IPPROTO_UDP;
2944
2945 iph->daddr = pkt_dev->cur_in6_daddr;
2946 iph->saddr = pkt_dev->cur_in6_saddr;
2947
2948 skb->protocol = protocol;
2949 skb->dev = odev;
2950 skb->pkt_type = PACKET_HOST;
2951
2952 if (!(pkt_dev->flags & F_UDPCSUM)) {
2953 skb->ip_summed = CHECKSUM_NONE;
2954 } else if (odev->features & NETIF_F_V6_CSUM) {
2955 skb->ip_summed = CHECKSUM_PARTIAL;
2956 skb->csum_start = skb_transport_header(skb) - skb->head;
2957 skb->csum_offset = offsetof(struct udphdr, check);
2958 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0);
2959 } else {
2960 __wsum csum = udp_csum(skb);
2961
2962 /* add protocol-dependent pseudo-header */
2963 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum);
2964
2965 if (udph->check == 0)
2966 udph->check = CSUM_MANGLED_0;
2967 }
2968
2969 pktgen_finalize_skb(pkt_dev, skb, datalen);
2970
2971 return skb;
2972 }
2973
2974 static struct sk_buff *fill_packet(struct net_device *odev,
2975 struct pktgen_dev *pkt_dev)
2976 {
2977 if (pkt_dev->flags & F_IPV6)
2978 return fill_packet_ipv6(odev, pkt_dev);
2979 else
2980 return fill_packet_ipv4(odev, pkt_dev);
2981 }
2982
2983 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2984 {
2985 pkt_dev->seq_num = 1;
2986 pkt_dev->idle_acc = 0;
2987 pkt_dev->sofar = 0;
2988 pkt_dev->tx_bytes = 0;
2989 pkt_dev->errors = 0;
2990 }
2991
2992 /* Set up structure for sending pkts, clear counters */
2993
2994 static void pktgen_run(struct pktgen_thread *t)
2995 {
2996 struct pktgen_dev *pkt_dev;
2997 int started = 0;
2998
2999 func_enter();
3000
3001 rcu_read_lock();
3002 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3003
3004 /*
3005 * setup odev and create initial packet.
3006 */
3007 pktgen_setup_inject(pkt_dev);
3008
3009 if (pkt_dev->odev) {
3010 pktgen_clear_counters(pkt_dev);
3011 pkt_dev->skb = NULL;
3012 pkt_dev->started_at = pkt_dev->next_tx = ktime_get();
3013
3014 set_pkt_overhead(pkt_dev);
3015
3016 strcpy(pkt_dev->result, "Starting");
3017 pkt_dev->running = 1; /* Cranke yeself! */
3018 started++;
3019 } else
3020 strcpy(pkt_dev->result, "Error starting");
3021 }
3022 rcu_read_unlock();
3023 if (started)
3024 t->control &= ~(T_STOP);
3025 }
3026
3027 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn)
3028 {
3029 struct pktgen_thread *t;
3030
3031 func_enter();
3032
3033 mutex_lock(&pktgen_thread_lock);
3034
3035 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3036 t->control |= T_STOP;
3037
3038 mutex_unlock(&pktgen_thread_lock);
3039 }
3040
3041 static int thread_is_running(const struct pktgen_thread *t)
3042 {
3043 const struct pktgen_dev *pkt_dev;
3044
3045 rcu_read_lock();
3046 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
3047 if (pkt_dev->running) {
3048 rcu_read_unlock();
3049 return 1;
3050 }
3051 rcu_read_unlock();
3052 return 0;
3053 }
3054
3055 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3056 {
3057 while (thread_is_running(t)) {
3058
3059 msleep_interruptible(100);
3060
3061 if (signal_pending(current))
3062 goto signal;
3063 }
3064 return 1;
3065 signal:
3066 return 0;
3067 }
3068
3069 static int pktgen_wait_all_threads_run(struct pktgen_net *pn)
3070 {
3071 struct pktgen_thread *t;
3072 int sig = 1;
3073
3074 mutex_lock(&pktgen_thread_lock);
3075
3076 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
3077 sig = pktgen_wait_thread_run(t);
3078 if (sig == 0)
3079 break;
3080 }
3081
3082 if (sig == 0)
3083 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3084 t->control |= (T_STOP);
3085
3086 mutex_unlock(&pktgen_thread_lock);
3087 return sig;
3088 }
3089
3090 static void pktgen_run_all_threads(struct pktgen_net *pn)
3091 {
3092 struct pktgen_thread *t;
3093
3094 func_enter();
3095
3096 mutex_lock(&pktgen_thread_lock);
3097
3098 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3099 t->control |= (T_RUN);
3100
3101 mutex_unlock(&pktgen_thread_lock);
3102
3103 /* Propagate thread->control */
3104 schedule_timeout_interruptible(msecs_to_jiffies(125));
3105
3106 pktgen_wait_all_threads_run(pn);
3107 }
3108
3109 static void pktgen_reset_all_threads(struct pktgen_net *pn)
3110 {
3111 struct pktgen_thread *t;
3112
3113 func_enter();
3114
3115 mutex_lock(&pktgen_thread_lock);
3116
3117 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3118 t->control |= (T_REMDEVALL);
3119
3120 mutex_unlock(&pktgen_thread_lock);
3121
3122 /* Propagate thread->control */
3123 schedule_timeout_interruptible(msecs_to_jiffies(125));
3124
3125 pktgen_wait_all_threads_run(pn);
3126 }
3127
3128 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3129 {
3130 __u64 bps, mbps, pps;
3131 char *p = pkt_dev->result;
3132 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3133 pkt_dev->started_at);
3134 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3135
3136 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3137 (unsigned long long)ktime_to_us(elapsed),
3138 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3139 (unsigned long long)ktime_to_us(idle),
3140 (unsigned long long)pkt_dev->sofar,
3141 pkt_dev->cur_pkt_size, nr_frags);
3142
3143 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3144 ktime_to_ns(elapsed));
3145
3146 bps = pps * 8 * pkt_dev->cur_pkt_size;
3147
3148 mbps = bps;
3149 do_div(mbps, 1000000);
3150 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3151 (unsigned long long)pps,
3152 (unsigned long long)mbps,
3153 (unsigned long long)bps,
3154 (unsigned long long)pkt_dev->errors);
3155 }
3156
3157 /* Set stopped-at timer, remove from running list, do counters & statistics */
3158 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3159 {
3160 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3161
3162 if (!pkt_dev->running) {
3163 pr_warning("interface: %s is already stopped\n",
3164 pkt_dev->odevname);
3165 return -EINVAL;
3166 }
3167
3168 pkt_dev->running = 0;
3169 kfree_skb(pkt_dev->skb);
3170 pkt_dev->skb = NULL;
3171 pkt_dev->stopped_at = ktime_get();
3172
3173 show_results(pkt_dev, nr_frags);
3174
3175 return 0;
3176 }
3177
3178 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3179 {
3180 struct pktgen_dev *pkt_dev, *best = NULL;
3181
3182 rcu_read_lock();
3183 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3184 if (!pkt_dev->running)
3185 continue;
3186 if (best == NULL)
3187 best = pkt_dev;
3188 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0)
3189 best = pkt_dev;
3190 }
3191 rcu_read_unlock();
3192
3193 return best;
3194 }
3195
3196 static void pktgen_stop(struct pktgen_thread *t)
3197 {
3198 struct pktgen_dev *pkt_dev;
3199
3200 func_enter();
3201
3202 rcu_read_lock();
3203
3204 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3205 pktgen_stop_device(pkt_dev);
3206 }
3207
3208 rcu_read_unlock();
3209 }
3210
3211 /*
3212 * one of our devices needs to be removed - find it
3213 * and remove it
3214 */
3215 static void pktgen_rem_one_if(struct pktgen_thread *t)
3216 {
3217 struct list_head *q, *n;
3218 struct pktgen_dev *cur;
3219
3220 func_enter();
3221
3222 list_for_each_safe(q, n, &t->if_list) {
3223 cur = list_entry(q, struct pktgen_dev, list);
3224
3225 if (!cur->removal_mark)
3226 continue;
3227
3228 kfree_skb(cur->skb);
3229 cur->skb = NULL;
3230
3231 pktgen_remove_device(t, cur);
3232
3233 break;
3234 }
3235 }
3236
3237 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3238 {
3239 struct list_head *q, *n;
3240 struct pktgen_dev *cur;
3241
3242 func_enter();
3243
3244 /* Remove all devices, free mem */
3245
3246 list_for_each_safe(q, n, &t->if_list) {
3247 cur = list_entry(q, struct pktgen_dev, list);
3248
3249 kfree_skb(cur->skb);
3250 cur->skb = NULL;
3251
3252 pktgen_remove_device(t, cur);
3253 }
3254 }
3255
3256 static void pktgen_rem_thread(struct pktgen_thread *t)
3257 {
3258 /* Remove from the thread list */
3259 remove_proc_entry(t->tsk->comm, t->net->proc_dir);
3260 }
3261
3262 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3263 {
3264 ktime_t idle_start = ktime_get();
3265 schedule();
3266 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3267 }
3268
3269 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3270 {
3271 ktime_t idle_start = ktime_get();
3272
3273 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3274 if (signal_pending(current))
3275 break;
3276
3277 if (need_resched())
3278 pktgen_resched(pkt_dev);
3279 else
3280 cpu_relax();
3281 }
3282 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3283 }
3284
3285 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3286 {
3287 struct net_device *odev = pkt_dev->odev;
3288 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3289 = odev->netdev_ops->ndo_start_xmit;
3290 struct netdev_queue *txq;
3291 u16 queue_map;
3292 int ret;
3293
3294 /* If device is offline, then don't send */
3295 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3296 pktgen_stop_device(pkt_dev);
3297 return;
3298 }
3299
3300 /* This is max DELAY, this has special meaning of
3301 * "never transmit"
3302 */
3303 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3304 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
3305 return;
3306 }
3307
3308 /* If no skb or clone count exhausted then get new one */
3309 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3310 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3311 /* build a new pkt */
3312 kfree_skb(pkt_dev->skb);
3313
3314 pkt_dev->skb = fill_packet(odev, pkt_dev);
3315 if (pkt_dev->skb == NULL) {
3316 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3317 schedule();
3318 pkt_dev->clone_count--; /* back out increment, OOM */
3319 return;
3320 }
3321 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3322 pkt_dev->allocated_skbs++;
3323 pkt_dev->clone_count = 0; /* reset counter */
3324 }
3325
3326 if (pkt_dev->delay && pkt_dev->last_ok)
3327 spin(pkt_dev, pkt_dev->next_tx);
3328
3329 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3330 txq = netdev_get_tx_queue(odev, queue_map);
3331
3332 local_bh_disable();
3333
3334 HARD_TX_LOCK(odev, txq, smp_processor_id());
3335
3336 if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) {
3337 ret = NETDEV_TX_BUSY;
3338 pkt_dev->last_ok = 0;
3339 goto unlock;
3340 }
3341 atomic_inc(&(pkt_dev->skb->users));
3342 ret = (*xmit)(pkt_dev->skb, odev);
3343
3344 switch (ret) {
3345 case NETDEV_TX_OK:
3346 txq_trans_update(txq);
3347 pkt_dev->last_ok = 1;
3348 pkt_dev->sofar++;
3349 pkt_dev->seq_num++;
3350 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3351 break;
3352 case NET_XMIT_DROP:
3353 case NET_XMIT_CN:
3354 case NET_XMIT_POLICED:
3355 /* skb has been consumed */
3356 pkt_dev->errors++;
3357 break;
3358 default: /* Drivers are not supposed to return other values! */
3359 net_info_ratelimited("%s xmit error: %d\n",
3360 pkt_dev->odevname, ret);
3361 pkt_dev->errors++;
3362 /* fallthru */
3363 case NETDEV_TX_LOCKED:
3364 case NETDEV_TX_BUSY:
3365 /* Retry it next time */
3366 atomic_dec(&(pkt_dev->skb->users));
3367 pkt_dev->last_ok = 0;
3368 }
3369 unlock:
3370 HARD_TX_UNLOCK(odev, txq);
3371
3372 local_bh_enable();
3373
3374 /* If pkt_dev->count is zero, then run forever */
3375 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3376 pktgen_wait_for_skb(pkt_dev);
3377
3378 /* Done with this */
3379 pktgen_stop_device(pkt_dev);
3380 }
3381 }
3382
3383 /*
3384 * Main loop of the thread goes here
3385 */
3386
3387 static int pktgen_thread_worker(void *arg)
3388 {
3389 DEFINE_WAIT(wait);
3390 struct pktgen_thread *t = arg;
3391 struct pktgen_dev *pkt_dev = NULL;
3392 int cpu = t->cpu;
3393
3394 BUG_ON(smp_processor_id() != cpu);
3395
3396 init_waitqueue_head(&t->queue);
3397 complete(&t->start_done);
3398
3399 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3400
3401 set_freezable();
3402
3403 __set_current_state(TASK_RUNNING);
3404
3405 while (!kthread_should_stop()) {
3406 pkt_dev = next_to_run(t);
3407
3408 if (unlikely(!pkt_dev && t->control == 0)) {
3409 if (t->net->pktgen_exiting)
3410 break;
3411 wait_event_interruptible_timeout(t->queue,
3412 t->control != 0,
3413 HZ/10);
3414 try_to_freeze();
3415 continue;
3416 }
3417
3418 if (likely(pkt_dev)) {
3419 pktgen_xmit(pkt_dev);
3420
3421 if (need_resched())
3422 pktgen_resched(pkt_dev);
3423 else
3424 cpu_relax();
3425 }
3426
3427 if (t->control & T_STOP) {
3428 pktgen_stop(t);
3429 t->control &= ~(T_STOP);
3430 }
3431
3432 if (t->control & T_RUN) {
3433 pktgen_run(t);
3434 t->control &= ~(T_RUN);
3435 }
3436
3437 if (t->control & T_REMDEVALL) {
3438 pktgen_rem_all_ifs(t);
3439 t->control &= ~(T_REMDEVALL);
3440 }
3441
3442 if (t->control & T_REMDEV) {
3443 pktgen_rem_one_if(t);
3444 t->control &= ~(T_REMDEV);
3445 }
3446
3447 try_to_freeze();
3448 }
3449 set_current_state(TASK_INTERRUPTIBLE);
3450
3451 pr_debug("%s stopping all device\n", t->tsk->comm);
3452 pktgen_stop(t);
3453
3454 pr_debug("%s removing all device\n", t->tsk->comm);
3455 pktgen_rem_all_ifs(t);
3456
3457 pr_debug("%s removing thread\n", t->tsk->comm);
3458 pktgen_rem_thread(t);
3459
3460 /* Wait for kthread_stop */
3461 while (!kthread_should_stop()) {
3462 set_current_state(TASK_INTERRUPTIBLE);
3463 schedule();
3464 }
3465 __set_current_state(TASK_RUNNING);
3466
3467 return 0;
3468 }
3469
3470 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3471 const char *ifname, bool exact)
3472 {
3473 struct pktgen_dev *p, *pkt_dev = NULL;
3474 size_t len = strlen(ifname);
3475
3476 rcu_read_lock();
3477 list_for_each_entry_rcu(p, &t->if_list, list)
3478 if (strncmp(p->odevname, ifname, len) == 0) {
3479 if (p->odevname[len]) {
3480 if (exact || p->odevname[len] != '@')
3481 continue;
3482 }
3483 pkt_dev = p;
3484 break;
3485 }
3486
3487 rcu_read_unlock();
3488 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3489 return pkt_dev;
3490 }
3491
3492 /*
3493 * Adds a dev at front of if_list.
3494 */
3495
3496 static int add_dev_to_thread(struct pktgen_thread *t,
3497 struct pktgen_dev *pkt_dev)
3498 {
3499 int rv = 0;
3500
3501 /* This function cannot be called concurrently, as its called
3502 * under pktgen_thread_lock mutex, but it can run from
3503 * userspace on another CPU than the kthread. The if_lock()
3504 * is used here to sync with concurrent instances of
3505 * _rem_dev_from_if_list() invoked via kthread, which is also
3506 * updating the if_list */
3507 if_lock(t);
3508
3509 if (pkt_dev->pg_thread) {
3510 pr_err("ERROR: already assigned to a thread\n");
3511 rv = -EBUSY;
3512 goto out;
3513 }
3514
3515 pkt_dev->running = 0;
3516 pkt_dev->pg_thread = t;
3517 list_add_rcu(&pkt_dev->list, &t->if_list);
3518
3519 out:
3520 if_unlock(t);
3521 return rv;
3522 }
3523
3524 /* Called under thread lock */
3525
3526 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3527 {
3528 struct pktgen_dev *pkt_dev;
3529 int err;
3530 int node = cpu_to_node(t->cpu);
3531
3532 /* We don't allow a device to be on several threads */
3533
3534 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND);
3535 if (pkt_dev) {
3536 pr_err("ERROR: interface already used\n");
3537 return -EBUSY;
3538 }
3539
3540 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3541 if (!pkt_dev)
3542 return -ENOMEM;
3543
3544 strcpy(pkt_dev->odevname, ifname);
3545 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3546 node);
3547 if (pkt_dev->flows == NULL) {
3548 kfree(pkt_dev);
3549 return -ENOMEM;
3550 }
3551
3552 pkt_dev->removal_mark = 0;
3553 pkt_dev->nfrags = 0;
3554 pkt_dev->delay = pg_delay_d;
3555 pkt_dev->count = pg_count_d;
3556 pkt_dev->sofar = 0;
3557 pkt_dev->udp_src_min = 9; /* sink port */
3558 pkt_dev->udp_src_max = 9;
3559 pkt_dev->udp_dst_min = 9;
3560 pkt_dev->udp_dst_max = 9;
3561 pkt_dev->vlan_p = 0;
3562 pkt_dev->vlan_cfi = 0;
3563 pkt_dev->vlan_id = 0xffff;
3564 pkt_dev->svlan_p = 0;
3565 pkt_dev->svlan_cfi = 0;
3566 pkt_dev->svlan_id = 0xffff;
3567 pkt_dev->node = -1;
3568
3569 err = pktgen_setup_dev(t->net, pkt_dev, ifname);
3570 if (err)
3571 goto out1;
3572 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3573 pkt_dev->clone_skb = pg_clone_skb_d;
3574
3575 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir,
3576 &pktgen_if_fops, pkt_dev);
3577 if (!pkt_dev->entry) {
3578 pr_err("cannot create %s/%s procfs entry\n",
3579 PG_PROC_DIR, ifname);
3580 err = -EINVAL;
3581 goto out2;
3582 }
3583 #ifdef CONFIG_XFRM
3584 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3585 pkt_dev->ipsproto = IPPROTO_ESP;
3586
3587 /* xfrm tunnel mode needs additional dst to extract outter
3588 * ip header protocol/ttl/id field, here creat a phony one.
3589 * instead of looking for a valid rt, which definitely hurting
3590 * performance under such circumstance.
3591 */
3592 pkt_dev->dstops.family = AF_INET;
3593 pkt_dev->dst.dev = pkt_dev->odev;
3594 dst_init_metrics(&pkt_dev->dst, pktgen_dst_metrics, false);
3595 pkt_dev->dst.child = &pkt_dev->dst;
3596 pkt_dev->dst.ops = &pkt_dev->dstops;
3597 #endif
3598
3599 return add_dev_to_thread(t, pkt_dev);
3600 out2:
3601 dev_put(pkt_dev->odev);
3602 out1:
3603 #ifdef CONFIG_XFRM
3604 free_SAs(pkt_dev);
3605 #endif
3606 vfree(pkt_dev->flows);
3607 kfree(pkt_dev);
3608 return err;
3609 }
3610
3611 static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
3612 {
3613 struct pktgen_thread *t;
3614 struct proc_dir_entry *pe;
3615 struct task_struct *p;
3616
3617 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3618 cpu_to_node(cpu));
3619 if (!t) {
3620 pr_err("ERROR: out of memory, can't create new thread\n");
3621 return -ENOMEM;
3622 }
3623
3624 spin_lock_init(&t->if_lock);
3625 t->cpu = cpu;
3626
3627 INIT_LIST_HEAD(&t->if_list);
3628
3629 list_add_tail(&t->th_list, &pn->pktgen_threads);
3630 init_completion(&t->start_done);
3631
3632 p = kthread_create_on_node(pktgen_thread_worker,
3633 t,
3634 cpu_to_node(cpu),
3635 "kpktgend_%d", cpu);
3636 if (IS_ERR(p)) {
3637 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3638 list_del(&t->th_list);
3639 kfree(t);
3640 return PTR_ERR(p);
3641 }
3642 kthread_bind(p, cpu);
3643 t->tsk = p;
3644
3645 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
3646 &pktgen_thread_fops, t);
3647 if (!pe) {
3648 pr_err("cannot create %s/%s procfs entry\n",
3649 PG_PROC_DIR, t->tsk->comm);
3650 kthread_stop(p);
3651 list_del(&t->th_list);
3652 kfree(t);
3653 return -EINVAL;
3654 }
3655
3656 t->net = pn;
3657 wake_up_process(p);
3658 wait_for_completion(&t->start_done);
3659
3660 return 0;
3661 }
3662
3663 /*
3664 * Removes a device from the thread if_list.
3665 */
3666 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3667 struct pktgen_dev *pkt_dev)
3668 {
3669 struct list_head *q, *n;
3670 struct pktgen_dev *p;
3671
3672 if_lock(t);
3673 list_for_each_safe(q, n, &t->if_list) {
3674 p = list_entry(q, struct pktgen_dev, list);
3675 if (p == pkt_dev)
3676 list_del_rcu(&p->list);
3677 }
3678 if_unlock(t);
3679 }
3680
3681 static int pktgen_remove_device(struct pktgen_thread *t,
3682 struct pktgen_dev *pkt_dev)
3683 {
3684 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3685
3686 if (pkt_dev->running) {
3687 pr_warning("WARNING: trying to remove a running interface, stopping it now\n");
3688 pktgen_stop_device(pkt_dev);
3689 }
3690
3691 /* Dis-associate from the interface */
3692
3693 if (pkt_dev->odev) {
3694 dev_put(pkt_dev->odev);
3695 pkt_dev->odev = NULL;
3696 }
3697
3698 /* Remove proc before if_list entry, because add_device uses
3699 * list to determine if interface already exist, avoid race
3700 * with proc_create_data() */
3701 if (pkt_dev->entry)
3702 proc_remove(pkt_dev->entry);
3703
3704 /* And update the thread if_list */
3705 _rem_dev_from_if_list(t, pkt_dev);
3706
3707 #ifdef CONFIG_XFRM
3708 free_SAs(pkt_dev);
3709 #endif
3710 vfree(pkt_dev->flows);
3711 if (pkt_dev->page)
3712 put_page(pkt_dev->page);
3713 kfree_rcu(pkt_dev, rcu);
3714 return 0;
3715 }
3716
3717 static int __net_init pg_net_init(struct net *net)
3718 {
3719 struct pktgen_net *pn = net_generic(net, pg_net_id);
3720 struct proc_dir_entry *pe;
3721 int cpu, ret = 0;
3722
3723 pn->net = net;
3724 INIT_LIST_HEAD(&pn->pktgen_threads);
3725 pn->pktgen_exiting = false;
3726 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net);
3727 if (!pn->proc_dir) {
3728 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR);
3729 return -ENODEV;
3730 }
3731 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops);
3732 if (pe == NULL) {
3733 pr_err("cannot create %s procfs entry\n", PGCTRL);
3734 ret = -EINVAL;
3735 goto remove;
3736 }
3737
3738 for_each_online_cpu(cpu) {
3739 int err;
3740
3741 err = pktgen_create_thread(cpu, pn);
3742 if (err)
3743 pr_warn("Cannot create thread for cpu %d (%d)\n",
3744 cpu, err);
3745 }
3746
3747 if (list_empty(&pn->pktgen_threads)) {
3748 pr_err("Initialization failed for all threads\n");
3749 ret = -ENODEV;
3750 goto remove_entry;
3751 }
3752
3753 return 0;
3754
3755 remove_entry:
3756 remove_proc_entry(PGCTRL, pn->proc_dir);
3757 remove:
3758 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3759 return ret;
3760 }
3761
3762 static void __net_exit pg_net_exit(struct net *net)
3763 {
3764 struct pktgen_net *pn = net_generic(net, pg_net_id);
3765 struct pktgen_thread *t;
3766 struct list_head *q, *n;
3767 LIST_HEAD(list);
3768
3769 /* Stop all interfaces & threads */
3770 pn->pktgen_exiting = true;
3771
3772 mutex_lock(&pktgen_thread_lock);
3773 list_splice_init(&pn->pktgen_threads, &list);
3774 mutex_unlock(&pktgen_thread_lock);
3775
3776 list_for_each_safe(q, n, &list) {
3777 t = list_entry(q, struct pktgen_thread, th_list);
3778 list_del(&t->th_list);
3779 kthread_stop(t->tsk);
3780 kfree(t);
3781 }
3782
3783 remove_proc_entry(PGCTRL, pn->proc_dir);
3784 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3785 }
3786
3787 static struct pernet_operations pg_net_ops = {
3788 .init = pg_net_init,
3789 .exit = pg_net_exit,
3790 .id = &pg_net_id,
3791 .size = sizeof(struct pktgen_net),
3792 };
3793
3794 static int __init pg_init(void)
3795 {
3796 int ret = 0;
3797
3798 pr_info("%s", version);
3799 ret = register_pernet_subsys(&pg_net_ops);
3800 if (ret)
3801 return ret;
3802 ret = register_netdevice_notifier(&pktgen_notifier_block);
3803 if (ret)
3804 unregister_pernet_subsys(&pg_net_ops);
3805
3806 return ret;
3807 }
3808
3809 static void __exit pg_cleanup(void)
3810 {
3811 unregister_netdevice_notifier(&pktgen_notifier_block);
3812 unregister_pernet_subsys(&pg_net_ops);
3813 /* Don't need rcu_barrier() due to use of kfree_rcu() */
3814 }
3815
3816 module_init(pg_init);
3817 module_exit(pg_cleanup);
3818
3819 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3820 MODULE_DESCRIPTION("Packet Generator tool");
3821 MODULE_LICENSE("GPL");
3822 MODULE_VERSION(VERSION);
3823 module_param(pg_count_d, int, 0);
3824 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3825 module_param(pg_delay_d, int, 0);
3826 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3827 module_param(pg_clone_skb_d, int, 0);
3828 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3829 module_param(debug, int, 0);
3830 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
Linux with added FPC-III support