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tuntap: switch to use rtnl_dereference()
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / core / pktgen.c
blobb29dacf900f9496a42a565a3b2c48ad9cf502c74
1 /*
2 * Authors:
3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
4 * Uppsala University and
5 * Swedish University of Agricultural Sciences
6 *
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 * Ben Greear <greearb@candelatech.com>
9 * Jens Låås <jens.laas@data.slu.se>
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 *
16 *
17 * A tool for loading the network with preconfigurated packets.
18 * The tool is implemented as a linux module. Parameters are output
19 * device, delay (to hard_xmit), number of packets, and whether
20 * to use multiple SKBs or just the same one.
21 * pktgen uses the installed interface's output routine.
22 *
23 * Additional hacking by:
24 *
25 * Jens.Laas@data.slu.se
26 * Improved by ANK. 010120.
27 * Improved by ANK even more. 010212.
28 * MAC address typo fixed. 010417 --ro
29 * Integrated. 020301 --DaveM
30 * Added multiskb option 020301 --DaveM
31 * Scaling of results. 020417--sigurdur@linpro.no
32 * Significant re-work of the module:
33 * * Convert to threaded model to more efficiently be able to transmit
34 * and receive on multiple interfaces at once.
35 * * Converted many counters to __u64 to allow longer runs.
36 * * Allow configuration of ranges, like min/max IP address, MACs,
37 * and UDP-ports, for both source and destination, and can
38 * set to use a random distribution or sequentially walk the range.
39 * * Can now change most values after starting.
40 * * Place 12-byte packet in UDP payload with magic number,
41 * sequence number, and timestamp.
42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and
43 * latencies (with micro-second) precision.
44 * * Add IOCTL interface to easily get counters & configuration.
45 * --Ben Greear <greearb@candelatech.com>
46 *
47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
49 * as a "fastpath" with a configurable number of clones after alloc's.
50 * clone_skb=0 means all packets are allocated this also means ranges time
51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
52 * clones.
53 *
54 * Also moved to /proc/net/pktgen/
55 * --ro
56 *
57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
58 * mistakes. Also merged in DaveM's patch in the -pre6 patch.
59 * --Ben Greear <greearb@candelatech.com>
60 *
61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
62 *
63 *
64 * 021124 Finished major redesign and rewrite for new functionality.
65 * See Documentation/networking/pktgen.txt for how to use this.
66 *
67 * The new operation:
68 * For each CPU one thread/process is created at start. This process checks
69 * for running devices in the if_list and sends packets until count is 0 it
70 * also the thread checks the thread->control which is used for inter-process
71 * communication. controlling process "posts" operations to the threads this
72 * way. The if_lock should be possible to remove when add/rem_device is merged
73 * into this too.
74 *
75 * By design there should only be *one* "controlling" process. In practice
76 * multiple write accesses gives unpredictable result. Understood by "write"
77 * to /proc gives result code thats should be read be the "writer".
78 * For practical use this should be no problem.
79 *
80 * Note when adding devices to a specific CPU there good idea to also assign
81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
82 * --ro
83 *
84 * Fix refcount off by one if first packet fails, potential null deref,
85 * memleak 030710- KJP
86 *
87 * First "ranges" functionality for ipv6 030726 --ro
88 *
89 * Included flow support. 030802 ANK.
90 *
91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
92 *
93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
95 *
96 * New xmit() return, do_div and misc clean up by Stephen Hemminger
97 * <shemminger@osdl.org> 040923
98 *
99 * Randy Dunlap fixed u64 printk compiler waring
100 *
101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
103 *
104 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
106 *
107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
108 * 050103
109 *
110 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
111 *
112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
113 *
114 * Fixed src_mac command to set source mac of packet to value specified in
115 * command by Adit Ranadive <adit.262@gmail.com>
116 *
117 */
118
119 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
120
121 #include <linux/sys.h>
122 #include <linux/types.h>
123 #include <linux/module.h>
124 #include <linux/moduleparam.h>
125 #include <linux/kernel.h>
126 #include <linux/mutex.h>
127 #include <linux/sched.h>
128 #include <linux/slab.h>
129 #include <linux/vmalloc.h>
130 #include <linux/unistd.h>
131 #include <linux/string.h>
132 #include <linux/ptrace.h>
133 #include <linux/errno.h>
134 #include <linux/ioport.h>
135 #include <linux/interrupt.h>
136 #include <linux/capability.h>
137 #include <linux/hrtimer.h>
138 #include <linux/freezer.h>
139 #include <linux/delay.h>
140 #include <linux/timer.h>
141 #include <linux/list.h>
142 #include <linux/init.h>
143 #include <linux/skbuff.h>
144 #include <linux/netdevice.h>
145 #include <linux/inet.h>
146 #include <linux/inetdevice.h>
147 #include <linux/rtnetlink.h>
148 #include <linux/if_arp.h>
149 #include <linux/if_vlan.h>
150 #include <linux/in.h>
151 #include <linux/ip.h>
152 #include <linux/ipv6.h>
153 #include <linux/udp.h>
154 #include <linux/proc_fs.h>
155 #include <linux/seq_file.h>
156 #include <linux/wait.h>
157 #include <linux/etherdevice.h>
158 #include <linux/kthread.h>
159 #include <linux/prefetch.h>
160 #include <net/net_namespace.h>
161 #include <net/checksum.h>
162 #include <net/ipv6.h>
163 #include <net/addrconf.h>
164 #ifdef CONFIG_XFRM
165 #include <net/xfrm.h>
166 #endif
167 #include <asm/byteorder.h>
168 #include <linux/rcupdate.h>
169 #include <linux/bitops.h>
170 #include <linux/io.h>
171 #include <linux/timex.h>
172 #include <linux/uaccess.h>
173 #include <asm/dma.h>
174 #include <asm/div64.h> /* do_div */
175
176 #define VERSION "2.74"
177 #define IP_NAME_SZ 32
178 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
179 #define MPLS_STACK_BOTTOM htonl(0x00000100)
180
181 #define func_enter() pr_debug("entering %s\n", __func__);
182
183 /* Device flag bits */
184 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
185 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
186 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
187 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
188 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
189 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
190 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
191 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
192 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
193 #define F_VID_RND (1<<9) /* Random VLAN ID */
194 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
195 #define F_FLOW_SEQ (1<<11) /* Sequential flows */
196 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */
197 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
198 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
199 #define F_NODE (1<<15) /* Node memory alloc*/
200
201 /* Thread control flag bits */
202 #define T_STOP (1<<0) /* Stop run */
203 #define T_RUN (1<<1) /* Start run */
204 #define T_REMDEVALL (1<<2) /* Remove all devs */
205 #define T_REMDEV (1<<3) /* Remove one dev */
206
207 /* If lock -- can be removed after some work */
208 #define if_lock(t) spin_lock(&(t->if_lock));
209 #define if_unlock(t) spin_unlock(&(t->if_lock));
210
211 /* Used to help with determining the pkts on receive */
212 #define PKTGEN_MAGIC 0xbe9be955
213 #define PG_PROC_DIR "pktgen"
214 #define PGCTRL "pgctrl"
215 static struct proc_dir_entry *pg_proc_dir;
216
217 #define MAX_CFLOWS 65536
218
219 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
220 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
221
222 struct flow_state {
223 __be32 cur_daddr;
224 int count;
225 #ifdef CONFIG_XFRM
226 struct xfrm_state *x;
227 #endif
228 __u32 flags;
229 };
230
231 /* flow flag bits */
232 #define F_INIT (1<<0) /* flow has been initialized */
233
234 struct pktgen_dev {
235 /*
236 * Try to keep frequent/infrequent used vars. separated.
237 */
238 struct proc_dir_entry *entry; /* proc file */
239 struct pktgen_thread *pg_thread;/* the owner */
240 struct list_head list; /* chaining in the thread's run-queue */
241
242 int running; /* if false, the test will stop */
243
244 /* If min != max, then we will either do a linear iteration, or
245 * we will do a random selection from within the range.
246 */
247 __u32 flags;
248 int removal_mark; /* non-zero => the device is marked for
249 * removal by worker thread */
250
251 int min_pkt_size;
252 int max_pkt_size;
253 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
254 int nfrags;
255 struct page *page;
256 u64 delay; /* nano-seconds */
257
258 __u64 count; /* Default No packets to send */
259 __u64 sofar; /* How many pkts we've sent so far */
260 __u64 tx_bytes; /* How many bytes we've transmitted */
261 __u64 errors; /* Errors when trying to transmit, */
262
263 /* runtime counters relating to clone_skb */
264
265 __u64 allocated_skbs;
266 __u32 clone_count;
267 int last_ok; /* Was last skb sent?
268 * Or a failed transmit of some sort?
269 * This will keep sequence numbers in order
270 */
271 ktime_t next_tx;
272 ktime_t started_at;
273 ktime_t stopped_at;
274 u64 idle_acc; /* nano-seconds */
275
276 __u32 seq_num;
277
278 int clone_skb; /*
279 * Use multiple SKBs during packet gen.
280 * If this number is greater than 1, then
281 * that many copies of the same packet will be
282 * sent before a new packet is allocated.
283 * If you want to send 1024 identical packets
284 * before creating a new packet,
285 * set clone_skb to 1024.
286 */
287
288 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
289 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
290 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
291 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
292
293 struct in6_addr in6_saddr;
294 struct in6_addr in6_daddr;
295 struct in6_addr cur_in6_daddr;
296 struct in6_addr cur_in6_saddr;
297 /* For ranges */
298 struct in6_addr min_in6_daddr;
299 struct in6_addr max_in6_daddr;
300 struct in6_addr min_in6_saddr;
301 struct in6_addr max_in6_saddr;
302
303 /* If we're doing ranges, random or incremental, then this
304 * defines the min/max for those ranges.
305 */
306 __be32 saddr_min; /* inclusive, source IP address */
307 __be32 saddr_max; /* exclusive, source IP address */
308 __be32 daddr_min; /* inclusive, dest IP address */
309 __be32 daddr_max; /* exclusive, dest IP address */
310
311 __u16 udp_src_min; /* inclusive, source UDP port */
312 __u16 udp_src_max; /* exclusive, source UDP port */
313 __u16 udp_dst_min; /* inclusive, dest UDP port */
314 __u16 udp_dst_max; /* exclusive, dest UDP port */
315
316 /* DSCP + ECN */
317 __u8 tos; /* six MSB of (former) IPv4 TOS
318 are for dscp codepoint */
319 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
320 (see RFC 3260, sec. 4) */
321
322 /* MPLS */
323 unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */
324 __be32 labels[MAX_MPLS_LABELS];
325
326 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
327 __u8 vlan_p;
328 __u8 vlan_cfi;
329 __u16 vlan_id; /* 0xffff means no vlan tag */
330
331 __u8 svlan_p;
332 __u8 svlan_cfi;
333 __u16 svlan_id; /* 0xffff means no svlan tag */
334
335 __u32 src_mac_count; /* How many MACs to iterate through */
336 __u32 dst_mac_count; /* How many MACs to iterate through */
337
338 unsigned char dst_mac[ETH_ALEN];
339 unsigned char src_mac[ETH_ALEN];
340
341 __u32 cur_dst_mac_offset;
342 __u32 cur_src_mac_offset;
343 __be32 cur_saddr;
344 __be32 cur_daddr;
345 __u16 ip_id;
346 __u16 cur_udp_dst;
347 __u16 cur_udp_src;
348 __u16 cur_queue_map;
349 __u32 cur_pkt_size;
350 __u32 last_pkt_size;
351
352 __u8 hh[14];
353 /* = {
354 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
355
356 We fill in SRC address later
357 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
358 0x08, 0x00
359 };
360 */
361 __u16 pad; /* pad out the hh struct to an even 16 bytes */
362
363 struct sk_buff *skb; /* skb we are to transmit next, used for when we
364 * are transmitting the same one multiple times
365 */
366 struct net_device *odev; /* The out-going device.
367 * Note that the device should have it's
368 * pg_info pointer pointing back to this
369 * device.
370 * Set when the user specifies the out-going
371 * device name (not when the inject is
372 * started as it used to do.)
373 */
374 char odevname[32];
375 struct flow_state *flows;
376 unsigned int cflows; /* Concurrent flows (config) */
377 unsigned int lflow; /* Flow length (config) */
378 unsigned int nflows; /* accumulated flows (stats) */
379 unsigned int curfl; /* current sequenced flow (state)*/
380
381 u16 queue_map_min;
382 u16 queue_map_max;
383 __u32 skb_priority; /* skb priority field */
384 int node; /* Memory node */
385
386 #ifdef CONFIG_XFRM
387 __u8 ipsmode; /* IPSEC mode (config) */
388 __u8 ipsproto; /* IPSEC type (config) */
389 #endif
390 char result[512];
391 };
392
393 struct pktgen_hdr {
394 __be32 pgh_magic;
395 __be32 seq_num;
396 __be32 tv_sec;
397 __be32 tv_usec;
398 };
399
400 static bool pktgen_exiting __read_mostly;
401
402 struct pktgen_thread {
403 spinlock_t if_lock; /* for list of devices */
404 struct list_head if_list; /* All device here */
405 struct list_head th_list;
406 struct task_struct *tsk;
407 char result[512];
408
409 /* Field for thread to receive "posted" events terminate,
410 stop ifs etc. */
411
412 u32 control;
413 int cpu;
414
415 wait_queue_head_t queue;
416 struct completion start_done;
417 };
418
419 #define REMOVE 1
420 #define FIND 0
421
422 static const char version[] =
423 "Packet Generator for packet performance testing. "
424 "Version: " VERSION "\n";
425
426 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
427 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
428 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
429 const char *ifname, bool exact);
430 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
431 static void pktgen_run_all_threads(void);
432 static void pktgen_reset_all_threads(void);
433 static void pktgen_stop_all_threads_ifs(void);
434
435 static void pktgen_stop(struct pktgen_thread *t);
436 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
437
438 /* Module parameters, defaults. */
439 static int pg_count_d __read_mostly = 1000;
440 static int pg_delay_d __read_mostly;
441 static int pg_clone_skb_d __read_mostly;
442 static int debug __read_mostly;
443
444 static DEFINE_MUTEX(pktgen_thread_lock);
445 static LIST_HEAD(pktgen_threads);
446
447 static struct notifier_block pktgen_notifier_block = {
448 .notifier_call = pktgen_device_event,
449 };
450
451 /*
452 * /proc handling functions
453 *
454 */
455
456 static int pgctrl_show(struct seq_file *seq, void *v)
457 {
458 seq_puts(seq, version);
459 return 0;
460 }
461
462 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
463 size_t count, loff_t *ppos)
464 {
465 int err = 0;
466 char data[128];
467
468 if (!capable(CAP_NET_ADMIN)) {
469 err = -EPERM;
470 goto out;
471 }
472
473 if (count > sizeof(data))
474 count = sizeof(data);
475
476 if (copy_from_user(data, buf, count)) {
477 err = -EFAULT;
478 goto out;
479 }
480 data[count - 1] = 0; /* Make string */
481
482 if (!strcmp(data, "stop"))
483 pktgen_stop_all_threads_ifs();
484
485 else if (!strcmp(data, "start"))
486 pktgen_run_all_threads();
487
488 else if (!strcmp(data, "reset"))
489 pktgen_reset_all_threads();
490
491 else
492 pr_warning("Unknown command: %s\n", data);
493
494 err = count;
495
496 out:
497 return err;
498 }
499
500 static int pgctrl_open(struct inode *inode, struct file *file)
501 {
502 return single_open(file, pgctrl_show, PDE(inode)->data);
503 }
504
505 static const struct file_operations pktgen_fops = {
506 .owner = THIS_MODULE,
507 .open = pgctrl_open,
508 .read = seq_read,
509 .llseek = seq_lseek,
510 .write = pgctrl_write,
511 .release = single_release,
512 };
513
514 static int pktgen_if_show(struct seq_file *seq, void *v)
515 {
516 const struct pktgen_dev *pkt_dev = seq->private;
517 ktime_t stopped;
518 u64 idle;
519
520 seq_printf(seq,
521 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
522 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
523 pkt_dev->max_pkt_size);
524
525 seq_printf(seq,
526 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
527 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
528 pkt_dev->clone_skb, pkt_dev->odevname);
529
530 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
531 pkt_dev->lflow);
532
533 seq_printf(seq,
534 " queue_map_min: %u queue_map_max: %u\n",
535 pkt_dev->queue_map_min,
536 pkt_dev->queue_map_max);
537
538 if (pkt_dev->skb_priority)
539 seq_printf(seq, " skb_priority: %u\n",
540 pkt_dev->skb_priority);
541
542 if (pkt_dev->flags & F_IPV6) {
543 seq_printf(seq,
544 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
545 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
546 &pkt_dev->in6_saddr,
547 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
548 &pkt_dev->in6_daddr,
549 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
550 } else {
551 seq_printf(seq,
552 " dst_min: %s dst_max: %s\n",
553 pkt_dev->dst_min, pkt_dev->dst_max);
554 seq_printf(seq,
555 " src_min: %s src_max: %s\n",
556 pkt_dev->src_min, pkt_dev->src_max);
557 }
558
559 seq_puts(seq, " src_mac: ");
560
561 seq_printf(seq, "%pM ",
562 is_zero_ether_addr(pkt_dev->src_mac) ?
563 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
564
565 seq_printf(seq, "dst_mac: ");
566 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
567
568 seq_printf(seq,
569 " udp_src_min: %d udp_src_max: %d"
570 " udp_dst_min: %d udp_dst_max: %d\n",
571 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
572 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
573
574 seq_printf(seq,
575 " src_mac_count: %d dst_mac_count: %d\n",
576 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
577
578 if (pkt_dev->nr_labels) {
579 unsigned int i;
580 seq_printf(seq, " mpls: ");
581 for (i = 0; i < pkt_dev->nr_labels; i++)
582 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
583 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
584 }
585
586 if (pkt_dev->vlan_id != 0xffff)
587 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
588 pkt_dev->vlan_id, pkt_dev->vlan_p,
589 pkt_dev->vlan_cfi);
590
591 if (pkt_dev->svlan_id != 0xffff)
592 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
593 pkt_dev->svlan_id, pkt_dev->svlan_p,
594 pkt_dev->svlan_cfi);
595
596 if (pkt_dev->tos)
597 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
598
599 if (pkt_dev->traffic_class)
600 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
601
602 if (pkt_dev->node >= 0)
603 seq_printf(seq, " node: %d\n", pkt_dev->node);
604
605 seq_printf(seq, " Flags: ");
606
607 if (pkt_dev->flags & F_IPV6)
608 seq_printf(seq, "IPV6 ");
609
610 if (pkt_dev->flags & F_IPSRC_RND)
611 seq_printf(seq, "IPSRC_RND ");
612
613 if (pkt_dev->flags & F_IPDST_RND)
614 seq_printf(seq, "IPDST_RND ");
615
616 if (pkt_dev->flags & F_TXSIZE_RND)
617 seq_printf(seq, "TXSIZE_RND ");
618
619 if (pkt_dev->flags & F_UDPSRC_RND)
620 seq_printf(seq, "UDPSRC_RND ");
621
622 if (pkt_dev->flags & F_UDPDST_RND)
623 seq_printf(seq, "UDPDST_RND ");
624
625 if (pkt_dev->flags & F_MPLS_RND)
626 seq_printf(seq, "MPLS_RND ");
627
628 if (pkt_dev->flags & F_QUEUE_MAP_RND)
629 seq_printf(seq, "QUEUE_MAP_RND ");
630
631 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
632 seq_printf(seq, "QUEUE_MAP_CPU ");
633
634 if (pkt_dev->cflows) {
635 if (pkt_dev->flags & F_FLOW_SEQ)
636 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
637 else
638 seq_printf(seq, "FLOW_RND ");
639 }
640
641 #ifdef CONFIG_XFRM
642 if (pkt_dev->flags & F_IPSEC_ON)
643 seq_printf(seq, "IPSEC ");
644 #endif
645
646 if (pkt_dev->flags & F_MACSRC_RND)
647 seq_printf(seq, "MACSRC_RND ");
648
649 if (pkt_dev->flags & F_MACDST_RND)
650 seq_printf(seq, "MACDST_RND ");
651
652 if (pkt_dev->flags & F_VID_RND)
653 seq_printf(seq, "VID_RND ");
654
655 if (pkt_dev->flags & F_SVID_RND)
656 seq_printf(seq, "SVID_RND ");
657
658 if (pkt_dev->flags & F_NODE)
659 seq_printf(seq, "NODE_ALLOC ");
660
661 seq_puts(seq, "\n");
662
663 /* not really stopped, more like last-running-at */
664 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at;
665 idle = pkt_dev->idle_acc;
666 do_div(idle, NSEC_PER_USEC);
667
668 seq_printf(seq,
669 "Current:\n pkts-sofar: %llu errors: %llu\n",
670 (unsigned long long)pkt_dev->sofar,
671 (unsigned long long)pkt_dev->errors);
672
673 seq_printf(seq,
674 " started: %lluus stopped: %lluus idle: %lluus\n",
675 (unsigned long long) ktime_to_us(pkt_dev->started_at),
676 (unsigned long long) ktime_to_us(stopped),
677 (unsigned long long) idle);
678
679 seq_printf(seq,
680 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
681 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
682 pkt_dev->cur_src_mac_offset);
683
684 if (pkt_dev->flags & F_IPV6) {
685 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
686 &pkt_dev->cur_in6_saddr,
687 &pkt_dev->cur_in6_daddr);
688 } else
689 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n",
690 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
691
692 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
693 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
694
695 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
696
697 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
698
699 if (pkt_dev->result[0])
700 seq_printf(seq, "Result: %s\n", pkt_dev->result);
701 else
702 seq_printf(seq, "Result: Idle\n");
703
704 return 0;
705 }
706
707
708 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
709 __u32 *num)
710 {
711 int i = 0;
712 *num = 0;
713
714 for (; i < maxlen; i++) {
715 int value;
716 char c;
717 *num <<= 4;
718 if (get_user(c, &user_buffer[i]))
719 return -EFAULT;
720 value = hex_to_bin(c);
721 if (value >= 0)
722 *num |= value;
723 else
724 break;
725 }
726 return i;
727 }
728
729 static int count_trail_chars(const char __user * user_buffer,
730 unsigned int maxlen)
731 {
732 int i;
733
734 for (i = 0; i < maxlen; i++) {
735 char c;
736 if (get_user(c, &user_buffer[i]))
737 return -EFAULT;
738 switch (c) {
739 case '\"':
740 case '\n':
741 case '\r':
742 case '\t':
743 case ' ':
744 case '=':
745 break;
746 default:
747 goto done;
748 }
749 }
750 done:
751 return i;
752 }
753
754 static long num_arg(const char __user *user_buffer, unsigned long maxlen,
755 unsigned long *num)
756 {
757 int i;
758 *num = 0;
759
760 for (i = 0; i < maxlen; i++) {
761 char c;
762 if (get_user(c, &user_buffer[i]))
763 return -EFAULT;
764 if ((c >= '0') && (c <= '9')) {
765 *num *= 10;
766 *num += c - '0';
767 } else
768 break;
769 }
770 return i;
771 }
772
773 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
774 {
775 int i;
776
777 for (i = 0; i < maxlen; i++) {
778 char c;
779 if (get_user(c, &user_buffer[i]))
780 return -EFAULT;
781 switch (c) {
782 case '\"':
783 case '\n':
784 case '\r':
785 case '\t':
786 case ' ':
787 goto done_str;
788 break;
789 default:
790 break;
791 }
792 }
793 done_str:
794 return i;
795 }
796
797 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
798 {
799 unsigned int n = 0;
800 char c;
801 ssize_t i = 0;
802 int len;
803
804 pkt_dev->nr_labels = 0;
805 do {
806 __u32 tmp;
807 len = hex32_arg(&buffer[i], 8, &tmp);
808 if (len <= 0)
809 return len;
810 pkt_dev->labels[n] = htonl(tmp);
811 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
812 pkt_dev->flags |= F_MPLS_RND;
813 i += len;
814 if (get_user(c, &buffer[i]))
815 return -EFAULT;
816 i++;
817 n++;
818 if (n >= MAX_MPLS_LABELS)
819 return -E2BIG;
820 } while (c == ',');
821
822 pkt_dev->nr_labels = n;
823 return i;
824 }
825
826 static ssize_t pktgen_if_write(struct file *file,
827 const char __user * user_buffer, size_t count,
828 loff_t * offset)
829 {
830 struct seq_file *seq = file->private_data;
831 struct pktgen_dev *pkt_dev = seq->private;
832 int i, max, len;
833 char name[16], valstr[32];
834 unsigned long value = 0;
835 char *pg_result = NULL;
836 int tmp = 0;
837 char buf[128];
838
839 pg_result = &(pkt_dev->result[0]);
840
841 if (count < 1) {
842 pr_warning("wrong command format\n");
843 return -EINVAL;
844 }
845
846 max = count;
847 tmp = count_trail_chars(user_buffer, max);
848 if (tmp < 0) {
849 pr_warning("illegal format\n");
850 return tmp;
851 }
852 i = tmp;
853
854 /* Read variable name */
855
856 len = strn_len(&user_buffer[i], sizeof(name) - 1);
857 if (len < 0)
858 return len;
859
860 memset(name, 0, sizeof(name));
861 if (copy_from_user(name, &user_buffer[i], len))
862 return -EFAULT;
863 i += len;
864
865 max = count - i;
866 len = count_trail_chars(&user_buffer[i], max);
867 if (len < 0)
868 return len;
869
870 i += len;
871
872 if (debug) {
873 size_t copy = min_t(size_t, count, 1023);
874 char tb[copy + 1];
875 if (copy_from_user(tb, user_buffer, copy))
876 return -EFAULT;
877 tb[copy] = 0;
878 pr_debug("%s,%lu buffer -:%s:-\n",
879 name, (unsigned long)count, tb);
880 }
881
882 if (!strcmp(name, "min_pkt_size")) {
883 len = num_arg(&user_buffer[i], 10, &value);
884 if (len < 0)
885 return len;
886
887 i += len;
888 if (value < 14 + 20 + 8)
889 value = 14 + 20 + 8;
890 if (value != pkt_dev->min_pkt_size) {
891 pkt_dev->min_pkt_size = value;
892 pkt_dev->cur_pkt_size = value;
893 }
894 sprintf(pg_result, "OK: min_pkt_size=%u",
895 pkt_dev->min_pkt_size);
896 return count;
897 }
898
899 if (!strcmp(name, "max_pkt_size")) {
900 len = num_arg(&user_buffer[i], 10, &value);
901 if (len < 0)
902 return len;
903
904 i += len;
905 if (value < 14 + 20 + 8)
906 value = 14 + 20 + 8;
907 if (value != pkt_dev->max_pkt_size) {
908 pkt_dev->max_pkt_size = value;
909 pkt_dev->cur_pkt_size = value;
910 }
911 sprintf(pg_result, "OK: max_pkt_size=%u",
912 pkt_dev->max_pkt_size);
913 return count;
914 }
915
916 /* Shortcut for min = max */
917
918 if (!strcmp(name, "pkt_size")) {
919 len = num_arg(&user_buffer[i], 10, &value);
920 if (len < 0)
921 return len;
922
923 i += len;
924 if (value < 14 + 20 + 8)
925 value = 14 + 20 + 8;
926 if (value != pkt_dev->min_pkt_size) {
927 pkt_dev->min_pkt_size = value;
928 pkt_dev->max_pkt_size = value;
929 pkt_dev->cur_pkt_size = value;
930 }
931 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
932 return count;
933 }
934
935 if (!strcmp(name, "debug")) {
936 len = num_arg(&user_buffer[i], 10, &value);
937 if (len < 0)
938 return len;
939
940 i += len;
941 debug = value;
942 sprintf(pg_result, "OK: debug=%u", debug);
943 return count;
944 }
945
946 if (!strcmp(name, "frags")) {
947 len = num_arg(&user_buffer[i], 10, &value);
948 if (len < 0)
949 return len;
950
951 i += len;
952 pkt_dev->nfrags = value;
953 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
954 return count;
955 }
956 if (!strcmp(name, "delay")) {
957 len = num_arg(&user_buffer[i], 10, &value);
958 if (len < 0)
959 return len;
960
961 i += len;
962 if (value == 0x7FFFFFFF)
963 pkt_dev->delay = ULLONG_MAX;
964 else
965 pkt_dev->delay = (u64)value;
966
967 sprintf(pg_result, "OK: delay=%llu",
968 (unsigned long long) pkt_dev->delay);
969 return count;
970 }
971 if (!strcmp(name, "rate")) {
972 len = num_arg(&user_buffer[i], 10, &value);
973 if (len < 0)
974 return len;
975
976 i += len;
977 if (!value)
978 return len;
979 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
980 if (debug)
981 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
982
983 sprintf(pg_result, "OK: rate=%lu", value);
984 return count;
985 }
986 if (!strcmp(name, "ratep")) {
987 len = num_arg(&user_buffer[i], 10, &value);
988 if (len < 0)
989 return len;
990
991 i += len;
992 if (!value)
993 return len;
994 pkt_dev->delay = NSEC_PER_SEC/value;
995 if (debug)
996 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
997
998 sprintf(pg_result, "OK: rate=%lu", value);
999 return count;
1000 }
1001 if (!strcmp(name, "udp_src_min")) {
1002 len = num_arg(&user_buffer[i], 10, &value);
1003 if (len < 0)
1004 return len;
1005
1006 i += len;
1007 if (value != pkt_dev->udp_src_min) {
1008 pkt_dev->udp_src_min = value;
1009 pkt_dev->cur_udp_src = value;
1010 }
1011 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1012 return count;
1013 }
1014 if (!strcmp(name, "udp_dst_min")) {
1015 len = num_arg(&user_buffer[i], 10, &value);
1016 if (len < 0)
1017 return len;
1018
1019 i += len;
1020 if (value != pkt_dev->udp_dst_min) {
1021 pkt_dev->udp_dst_min = value;
1022 pkt_dev->cur_udp_dst = value;
1023 }
1024 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1025 return count;
1026 }
1027 if (!strcmp(name, "udp_src_max")) {
1028 len = num_arg(&user_buffer[i], 10, &value);
1029 if (len < 0)
1030 return len;
1031
1032 i += len;
1033 if (value != pkt_dev->udp_src_max) {
1034 pkt_dev->udp_src_max = value;
1035 pkt_dev->cur_udp_src = value;
1036 }
1037 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1038 return count;
1039 }
1040 if (!strcmp(name, "udp_dst_max")) {
1041 len = num_arg(&user_buffer[i], 10, &value);
1042 if (len < 0)
1043 return len;
1044
1045 i += len;
1046 if (value != pkt_dev->udp_dst_max) {
1047 pkt_dev->udp_dst_max = value;
1048 pkt_dev->cur_udp_dst = value;
1049 }
1050 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1051 return count;
1052 }
1053 if (!strcmp(name, "clone_skb")) {
1054 len = num_arg(&user_buffer[i], 10, &value);
1055 if (len < 0)
1056 return len;
1057 if ((value > 0) &&
1058 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1059 return -ENOTSUPP;
1060 i += len;
1061 pkt_dev->clone_skb = value;
1062
1063 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1064 return count;
1065 }
1066 if (!strcmp(name, "count")) {
1067 len = num_arg(&user_buffer[i], 10, &value);
1068 if (len < 0)
1069 return len;
1070
1071 i += len;
1072 pkt_dev->count = value;
1073 sprintf(pg_result, "OK: count=%llu",
1074 (unsigned long long)pkt_dev->count);
1075 return count;
1076 }
1077 if (!strcmp(name, "src_mac_count")) {
1078 len = num_arg(&user_buffer[i], 10, &value);
1079 if (len < 0)
1080 return len;
1081
1082 i += len;
1083 if (pkt_dev->src_mac_count != value) {
1084 pkt_dev->src_mac_count = value;
1085 pkt_dev->cur_src_mac_offset = 0;
1086 }
1087 sprintf(pg_result, "OK: src_mac_count=%d",
1088 pkt_dev->src_mac_count);
1089 return count;
1090 }
1091 if (!strcmp(name, "dst_mac_count")) {
1092 len = num_arg(&user_buffer[i], 10, &value);
1093 if (len < 0)
1094 return len;
1095
1096 i += len;
1097 if (pkt_dev->dst_mac_count != value) {
1098 pkt_dev->dst_mac_count = value;
1099 pkt_dev->cur_dst_mac_offset = 0;
1100 }
1101 sprintf(pg_result, "OK: dst_mac_count=%d",
1102 pkt_dev->dst_mac_count);
1103 return count;
1104 }
1105 if (!strcmp(name, "node")) {
1106 len = num_arg(&user_buffer[i], 10, &value);
1107 if (len < 0)
1108 return len;
1109
1110 i += len;
1111
1112 if (node_possible(value)) {
1113 pkt_dev->node = value;
1114 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1115 if (pkt_dev->page) {
1116 put_page(pkt_dev->page);
1117 pkt_dev->page = NULL;
1118 }
1119 }
1120 else
1121 sprintf(pg_result, "ERROR: node not possible");
1122 return count;
1123 }
1124 if (!strcmp(name, "flag")) {
1125 char f[32];
1126 memset(f, 0, 32);
1127 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1128 if (len < 0)
1129 return len;
1130
1131 if (copy_from_user(f, &user_buffer[i], len))
1132 return -EFAULT;
1133 i += len;
1134 if (strcmp(f, "IPSRC_RND") == 0)
1135 pkt_dev->flags |= F_IPSRC_RND;
1136
1137 else if (strcmp(f, "!IPSRC_RND") == 0)
1138 pkt_dev->flags &= ~F_IPSRC_RND;
1139
1140 else if (strcmp(f, "TXSIZE_RND") == 0)
1141 pkt_dev->flags |= F_TXSIZE_RND;
1142
1143 else if (strcmp(f, "!TXSIZE_RND") == 0)
1144 pkt_dev->flags &= ~F_TXSIZE_RND;
1145
1146 else if (strcmp(f, "IPDST_RND") == 0)
1147 pkt_dev->flags |= F_IPDST_RND;
1148
1149 else if (strcmp(f, "!IPDST_RND") == 0)
1150 pkt_dev->flags &= ~F_IPDST_RND;
1151
1152 else if (strcmp(f, "UDPSRC_RND") == 0)
1153 pkt_dev->flags |= F_UDPSRC_RND;
1154
1155 else if (strcmp(f, "!UDPSRC_RND") == 0)
1156 pkt_dev->flags &= ~F_UDPSRC_RND;
1157
1158 else if (strcmp(f, "UDPDST_RND") == 0)
1159 pkt_dev->flags |= F_UDPDST_RND;
1160
1161 else if (strcmp(f, "!UDPDST_RND") == 0)
1162 pkt_dev->flags &= ~F_UDPDST_RND;
1163
1164 else if (strcmp(f, "MACSRC_RND") == 0)
1165 pkt_dev->flags |= F_MACSRC_RND;
1166
1167 else if (strcmp(f, "!MACSRC_RND") == 0)
1168 pkt_dev->flags &= ~F_MACSRC_RND;
1169
1170 else if (strcmp(f, "MACDST_RND") == 0)
1171 pkt_dev->flags |= F_MACDST_RND;
1172
1173 else if (strcmp(f, "!MACDST_RND") == 0)
1174 pkt_dev->flags &= ~F_MACDST_RND;
1175
1176 else if (strcmp(f, "MPLS_RND") == 0)
1177 pkt_dev->flags |= F_MPLS_RND;
1178
1179 else if (strcmp(f, "!MPLS_RND") == 0)
1180 pkt_dev->flags &= ~F_MPLS_RND;
1181
1182 else if (strcmp(f, "VID_RND") == 0)
1183 pkt_dev->flags |= F_VID_RND;
1184
1185 else if (strcmp(f, "!VID_RND") == 0)
1186 pkt_dev->flags &= ~F_VID_RND;
1187
1188 else if (strcmp(f, "SVID_RND") == 0)
1189 pkt_dev->flags |= F_SVID_RND;
1190
1191 else if (strcmp(f, "!SVID_RND") == 0)
1192 pkt_dev->flags &= ~F_SVID_RND;
1193
1194 else if (strcmp(f, "FLOW_SEQ") == 0)
1195 pkt_dev->flags |= F_FLOW_SEQ;
1196
1197 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1198 pkt_dev->flags |= F_QUEUE_MAP_RND;
1199
1200 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1201 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1202
1203 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1204 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1205
1206 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1207 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1208 #ifdef CONFIG_XFRM
1209 else if (strcmp(f, "IPSEC") == 0)
1210 pkt_dev->flags |= F_IPSEC_ON;
1211 #endif
1212
1213 else if (strcmp(f, "!IPV6") == 0)
1214 pkt_dev->flags &= ~F_IPV6;
1215
1216 else if (strcmp(f, "NODE_ALLOC") == 0)
1217 pkt_dev->flags |= F_NODE;
1218
1219 else if (strcmp(f, "!NODE_ALLOC") == 0)
1220 pkt_dev->flags &= ~F_NODE;
1221
1222 else {
1223 sprintf(pg_result,
1224 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1225 f,
1226 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1227 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n");
1228 return count;
1229 }
1230 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1231 return count;
1232 }
1233 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1234 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1235 if (len < 0)
1236 return len;
1237
1238 if (copy_from_user(buf, &user_buffer[i], len))
1239 return -EFAULT;
1240 buf[len] = 0;
1241 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1242 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1243 strncpy(pkt_dev->dst_min, buf, len);
1244 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1245 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1246 }
1247 if (debug)
1248 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
1249 i += len;
1250 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1251 return count;
1252 }
1253 if (!strcmp(name, "dst_max")) {
1254 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1255 if (len < 0)
1256 return len;
1257
1258
1259 if (copy_from_user(buf, &user_buffer[i], len))
1260 return -EFAULT;
1261
1262 buf[len] = 0;
1263 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1264 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1265 strncpy(pkt_dev->dst_max, buf, len);
1266 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1267 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1268 }
1269 if (debug)
1270 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
1271 i += len;
1272 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1273 return count;
1274 }
1275 if (!strcmp(name, "dst6")) {
1276 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1277 if (len < 0)
1278 return len;
1279
1280 pkt_dev->flags |= F_IPV6;
1281
1282 if (copy_from_user(buf, &user_buffer[i], len))
1283 return -EFAULT;
1284 buf[len] = 0;
1285
1286 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
1287 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1288
1289 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1290
1291 if (debug)
1292 pr_debug("dst6 set to: %s\n", buf);
1293
1294 i += len;
1295 sprintf(pg_result, "OK: dst6=%s", buf);
1296 return count;
1297 }
1298 if (!strcmp(name, "dst6_min")) {
1299 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1300 if (len < 0)
1301 return len;
1302
1303 pkt_dev->flags |= F_IPV6;
1304
1305 if (copy_from_user(buf, &user_buffer[i], len))
1306 return -EFAULT;
1307 buf[len] = 0;
1308
1309 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
1310 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1311
1312 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
1313 if (debug)
1314 pr_debug("dst6_min set to: %s\n", buf);
1315
1316 i += len;
1317 sprintf(pg_result, "OK: dst6_min=%s", buf);
1318 return count;
1319 }
1320 if (!strcmp(name, "dst6_max")) {
1321 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1322 if (len < 0)
1323 return len;
1324
1325 pkt_dev->flags |= F_IPV6;
1326
1327 if (copy_from_user(buf, &user_buffer[i], len))
1328 return -EFAULT;
1329 buf[len] = 0;
1330
1331 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
1332 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1333
1334 if (debug)
1335 pr_debug("dst6_max set to: %s\n", buf);
1336
1337 i += len;
1338 sprintf(pg_result, "OK: dst6_max=%s", buf);
1339 return count;
1340 }
1341 if (!strcmp(name, "src6")) {
1342 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1343 if (len < 0)
1344 return len;
1345
1346 pkt_dev->flags |= F_IPV6;
1347
1348 if (copy_from_user(buf, &user_buffer[i], len))
1349 return -EFAULT;
1350 buf[len] = 0;
1351
1352 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
1353 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1354
1355 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1356
1357 if (debug)
1358 pr_debug("src6 set to: %s\n", buf);
1359
1360 i += len;
1361 sprintf(pg_result, "OK: src6=%s", buf);
1362 return count;
1363 }
1364 if (!strcmp(name, "src_min")) {
1365 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1366 if (len < 0)
1367 return len;
1368
1369 if (copy_from_user(buf, &user_buffer[i], len))
1370 return -EFAULT;
1371 buf[len] = 0;
1372 if (strcmp(buf, pkt_dev->src_min) != 0) {
1373 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1374 strncpy(pkt_dev->src_min, buf, len);
1375 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1376 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1377 }
1378 if (debug)
1379 pr_debug("src_min set to: %s\n", pkt_dev->src_min);
1380 i += len;
1381 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1382 return count;
1383 }
1384 if (!strcmp(name, "src_max")) {
1385 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1386 if (len < 0)
1387 return len;
1388
1389 if (copy_from_user(buf, &user_buffer[i], len))
1390 return -EFAULT;
1391 buf[len] = 0;
1392 if (strcmp(buf, pkt_dev->src_max) != 0) {
1393 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1394 strncpy(pkt_dev->src_max, buf, len);
1395 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1396 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1397 }
1398 if (debug)
1399 pr_debug("src_max set to: %s\n", pkt_dev->src_max);
1400 i += len;
1401 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1402 return count;
1403 }
1404 if (!strcmp(name, "dst_mac")) {
1405 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1406 if (len < 0)
1407 return len;
1408
1409 memset(valstr, 0, sizeof(valstr));
1410 if (copy_from_user(valstr, &user_buffer[i], len))
1411 return -EFAULT;
1412
1413 if (!mac_pton(valstr, pkt_dev->dst_mac))
1414 return -EINVAL;
1415 /* Set up Dest MAC */
1416 memcpy(&pkt_dev->hh[0], pkt_dev->dst_mac, ETH_ALEN);
1417
1418 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1419 return count;
1420 }
1421 if (!strcmp(name, "src_mac")) {
1422 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1423 if (len < 0)
1424 return len;
1425
1426 memset(valstr, 0, sizeof(valstr));
1427 if (copy_from_user(valstr, &user_buffer[i], len))
1428 return -EFAULT;
1429
1430 if (!mac_pton(valstr, pkt_dev->src_mac))
1431 return -EINVAL;
1432 /* Set up Src MAC */
1433 memcpy(&pkt_dev->hh[6], pkt_dev->src_mac, ETH_ALEN);
1434
1435 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1436 return count;
1437 }
1438
1439 if (!strcmp(name, "clear_counters")) {
1440 pktgen_clear_counters(pkt_dev);
1441 sprintf(pg_result, "OK: Clearing counters.\n");
1442 return count;
1443 }
1444
1445 if (!strcmp(name, "flows")) {
1446 len = num_arg(&user_buffer[i], 10, &value);
1447 if (len < 0)
1448 return len;
1449
1450 i += len;
1451 if (value > MAX_CFLOWS)
1452 value = MAX_CFLOWS;
1453
1454 pkt_dev->cflows = value;
1455 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1456 return count;
1457 }
1458
1459 if (!strcmp(name, "flowlen")) {
1460 len = num_arg(&user_buffer[i], 10, &value);
1461 if (len < 0)
1462 return len;
1463
1464 i += len;
1465 pkt_dev->lflow = value;
1466 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1467 return count;
1468 }
1469
1470 if (!strcmp(name, "queue_map_min")) {
1471 len = num_arg(&user_buffer[i], 5, &value);
1472 if (len < 0)
1473 return len;
1474
1475 i += len;
1476 pkt_dev->queue_map_min = value;
1477 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1478 return count;
1479 }
1480
1481 if (!strcmp(name, "queue_map_max")) {
1482 len = num_arg(&user_buffer[i], 5, &value);
1483 if (len < 0)
1484 return len;
1485
1486 i += len;
1487 pkt_dev->queue_map_max = value;
1488 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1489 return count;
1490 }
1491
1492 if (!strcmp(name, "mpls")) {
1493 unsigned int n, cnt;
1494
1495 len = get_labels(&user_buffer[i], pkt_dev);
1496 if (len < 0)
1497 return len;
1498 i += len;
1499 cnt = sprintf(pg_result, "OK: mpls=");
1500 for (n = 0; n < pkt_dev->nr_labels; n++)
1501 cnt += sprintf(pg_result + cnt,
1502 "%08x%s", ntohl(pkt_dev->labels[n]),
1503 n == pkt_dev->nr_labels-1 ? "" : ",");
1504
1505 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1506 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1507 pkt_dev->svlan_id = 0xffff;
1508
1509 if (debug)
1510 pr_debug("VLAN/SVLAN auto turned off\n");
1511 }
1512 return count;
1513 }
1514
1515 if (!strcmp(name, "vlan_id")) {
1516 len = num_arg(&user_buffer[i], 4, &value);
1517 if (len < 0)
1518 return len;
1519
1520 i += len;
1521 if (value <= 4095) {
1522 pkt_dev->vlan_id = value; /* turn on VLAN */
1523
1524 if (debug)
1525 pr_debug("VLAN turned on\n");
1526
1527 if (debug && pkt_dev->nr_labels)
1528 pr_debug("MPLS auto turned off\n");
1529
1530 pkt_dev->nr_labels = 0; /* turn off MPLS */
1531 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1532 } else {
1533 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1534 pkt_dev->svlan_id = 0xffff;
1535
1536 if (debug)
1537 pr_debug("VLAN/SVLAN turned off\n");
1538 }
1539 return count;
1540 }
1541
1542 if (!strcmp(name, "vlan_p")) {
1543 len = num_arg(&user_buffer[i], 1, &value);
1544 if (len < 0)
1545 return len;
1546
1547 i += len;
1548 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1549 pkt_dev->vlan_p = value;
1550 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1551 } else {
1552 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1553 }
1554 return count;
1555 }
1556
1557 if (!strcmp(name, "vlan_cfi")) {
1558 len = num_arg(&user_buffer[i], 1, &value);
1559 if (len < 0)
1560 return len;
1561
1562 i += len;
1563 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1564 pkt_dev->vlan_cfi = value;
1565 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1566 } else {
1567 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1568 }
1569 return count;
1570 }
1571
1572 if (!strcmp(name, "svlan_id")) {
1573 len = num_arg(&user_buffer[i], 4, &value);
1574 if (len < 0)
1575 return len;
1576
1577 i += len;
1578 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1579 pkt_dev->svlan_id = value; /* turn on SVLAN */
1580
1581 if (debug)
1582 pr_debug("SVLAN turned on\n");
1583
1584 if (debug && pkt_dev->nr_labels)
1585 pr_debug("MPLS auto turned off\n");
1586
1587 pkt_dev->nr_labels = 0; /* turn off MPLS */
1588 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1589 } else {
1590 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1591 pkt_dev->svlan_id = 0xffff;
1592
1593 if (debug)
1594 pr_debug("VLAN/SVLAN turned off\n");
1595 }
1596 return count;
1597 }
1598
1599 if (!strcmp(name, "svlan_p")) {
1600 len = num_arg(&user_buffer[i], 1, &value);
1601 if (len < 0)
1602 return len;
1603
1604 i += len;
1605 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1606 pkt_dev->svlan_p = value;
1607 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1608 } else {
1609 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1610 }
1611 return count;
1612 }
1613
1614 if (!strcmp(name, "svlan_cfi")) {
1615 len = num_arg(&user_buffer[i], 1, &value);
1616 if (len < 0)
1617 return len;
1618
1619 i += len;
1620 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1621 pkt_dev->svlan_cfi = value;
1622 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1623 } else {
1624 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1625 }
1626 return count;
1627 }
1628
1629 if (!strcmp(name, "tos")) {
1630 __u32 tmp_value = 0;
1631 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1632 if (len < 0)
1633 return len;
1634
1635 i += len;
1636 if (len == 2) {
1637 pkt_dev->tos = tmp_value;
1638 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1639 } else {
1640 sprintf(pg_result, "ERROR: tos must be 00-ff");
1641 }
1642 return count;
1643 }
1644
1645 if (!strcmp(name, "traffic_class")) {
1646 __u32 tmp_value = 0;
1647 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1648 if (len < 0)
1649 return len;
1650
1651 i += len;
1652 if (len == 2) {
1653 pkt_dev->traffic_class = tmp_value;
1654 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1655 } else {
1656 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1657 }
1658 return count;
1659 }
1660
1661 if (!strcmp(name, "skb_priority")) {
1662 len = num_arg(&user_buffer[i], 9, &value);
1663 if (len < 0)
1664 return len;
1665
1666 i += len;
1667 pkt_dev->skb_priority = value;
1668 sprintf(pg_result, "OK: skb_priority=%i",
1669 pkt_dev->skb_priority);
1670 return count;
1671 }
1672
1673 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1674 return -EINVAL;
1675 }
1676
1677 static int pktgen_if_open(struct inode *inode, struct file *file)
1678 {
1679 return single_open(file, pktgen_if_show, PDE(inode)->data);
1680 }
1681
1682 static const struct file_operations pktgen_if_fops = {
1683 .owner = THIS_MODULE,
1684 .open = pktgen_if_open,
1685 .read = seq_read,
1686 .llseek = seq_lseek,
1687 .write = pktgen_if_write,
1688 .release = single_release,
1689 };
1690
1691 static int pktgen_thread_show(struct seq_file *seq, void *v)
1692 {
1693 struct pktgen_thread *t = seq->private;
1694 const struct pktgen_dev *pkt_dev;
1695
1696 BUG_ON(!t);
1697
1698 seq_printf(seq, "Running: ");
1699
1700 if_lock(t);
1701 list_for_each_entry(pkt_dev, &t->if_list, list)
1702 if (pkt_dev->running)
1703 seq_printf(seq, "%s ", pkt_dev->odevname);
1704
1705 seq_printf(seq, "\nStopped: ");
1706
1707 list_for_each_entry(pkt_dev, &t->if_list, list)
1708 if (!pkt_dev->running)
1709 seq_printf(seq, "%s ", pkt_dev->odevname);
1710
1711 if (t->result[0])
1712 seq_printf(seq, "\nResult: %s\n", t->result);
1713 else
1714 seq_printf(seq, "\nResult: NA\n");
1715
1716 if_unlock(t);
1717
1718 return 0;
1719 }
1720
1721 static ssize_t pktgen_thread_write(struct file *file,
1722 const char __user * user_buffer,
1723 size_t count, loff_t * offset)
1724 {
1725 struct seq_file *seq = file->private_data;
1726 struct pktgen_thread *t = seq->private;
1727 int i, max, len, ret;
1728 char name[40];
1729 char *pg_result;
1730
1731 if (count < 1) {
1732 // sprintf(pg_result, "Wrong command format");
1733 return -EINVAL;
1734 }
1735
1736 max = count;
1737 len = count_trail_chars(user_buffer, max);
1738 if (len < 0)
1739 return len;
1740
1741 i = len;
1742
1743 /* Read variable name */
1744
1745 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1746 if (len < 0)
1747 return len;
1748
1749 memset(name, 0, sizeof(name));
1750 if (copy_from_user(name, &user_buffer[i], len))
1751 return -EFAULT;
1752 i += len;
1753
1754 max = count - i;
1755 len = count_trail_chars(&user_buffer[i], max);
1756 if (len < 0)
1757 return len;
1758
1759 i += len;
1760
1761 if (debug)
1762 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
1763
1764 if (!t) {
1765 pr_err("ERROR: No thread\n");
1766 ret = -EINVAL;
1767 goto out;
1768 }
1769
1770 pg_result = &(t->result[0]);
1771
1772 if (!strcmp(name, "add_device")) {
1773 char f[32];
1774 memset(f, 0, 32);
1775 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1776 if (len < 0) {
1777 ret = len;
1778 goto out;
1779 }
1780 if (copy_from_user(f, &user_buffer[i], len))
1781 return -EFAULT;
1782 i += len;
1783 mutex_lock(&pktgen_thread_lock);
1784 pktgen_add_device(t, f);
1785 mutex_unlock(&pktgen_thread_lock);
1786 ret = count;
1787 sprintf(pg_result, "OK: add_device=%s", f);
1788 goto out;
1789 }
1790
1791 if (!strcmp(name, "rem_device_all")) {
1792 mutex_lock(&pktgen_thread_lock);
1793 t->control |= T_REMDEVALL;
1794 mutex_unlock(&pktgen_thread_lock);
1795 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1796 ret = count;
1797 sprintf(pg_result, "OK: rem_device_all");
1798 goto out;
1799 }
1800
1801 if (!strcmp(name, "max_before_softirq")) {
1802 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1803 ret = count;
1804 goto out;
1805 }
1806
1807 ret = -EINVAL;
1808 out:
1809 return ret;
1810 }
1811
1812 static int pktgen_thread_open(struct inode *inode, struct file *file)
1813 {
1814 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1815 }
1816
1817 static const struct file_operations pktgen_thread_fops = {
1818 .owner = THIS_MODULE,
1819 .open = pktgen_thread_open,
1820 .read = seq_read,
1821 .llseek = seq_lseek,
1822 .write = pktgen_thread_write,
1823 .release = single_release,
1824 };
1825
1826 /* Think find or remove for NN */
1827 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1828 {
1829 struct pktgen_thread *t;
1830 struct pktgen_dev *pkt_dev = NULL;
1831 bool exact = (remove == FIND);
1832
1833 list_for_each_entry(t, &pktgen_threads, th_list) {
1834 pkt_dev = pktgen_find_dev(t, ifname, exact);
1835 if (pkt_dev) {
1836 if (remove) {
1837 if_lock(t);
1838 pkt_dev->removal_mark = 1;
1839 t->control |= T_REMDEV;
1840 if_unlock(t);
1841 }
1842 break;
1843 }
1844 }
1845 return pkt_dev;
1846 }
1847
1848 /*
1849 * mark a device for removal
1850 */
1851 static void pktgen_mark_device(const char *ifname)
1852 {
1853 struct pktgen_dev *pkt_dev = NULL;
1854 const int max_tries = 10, msec_per_try = 125;
1855 int i = 0;
1856
1857 mutex_lock(&pktgen_thread_lock);
1858 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1859
1860 while (1) {
1861
1862 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1863 if (pkt_dev == NULL)
1864 break; /* success */
1865
1866 mutex_unlock(&pktgen_thread_lock);
1867 pr_debug("%s: waiting for %s to disappear....\n",
1868 __func__, ifname);
1869 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1870 mutex_lock(&pktgen_thread_lock);
1871
1872 if (++i >= max_tries) {
1873 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1874 __func__, msec_per_try * i, ifname);
1875 break;
1876 }
1877
1878 }
1879
1880 mutex_unlock(&pktgen_thread_lock);
1881 }
1882
1883 static void pktgen_change_name(struct net_device *dev)
1884 {
1885 struct pktgen_thread *t;
1886
1887 list_for_each_entry(t, &pktgen_threads, th_list) {
1888 struct pktgen_dev *pkt_dev;
1889
1890 list_for_each_entry(pkt_dev, &t->if_list, list) {
1891 if (pkt_dev->odev != dev)
1892 continue;
1893
1894 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1895
1896 pkt_dev->entry = proc_create_data(dev->name, 0600,
1897 pg_proc_dir,
1898 &pktgen_if_fops,
1899 pkt_dev);
1900 if (!pkt_dev->entry)
1901 pr_err("can't move proc entry for '%s'\n",
1902 dev->name);
1903 break;
1904 }
1905 }
1906 }
1907
1908 static int pktgen_device_event(struct notifier_block *unused,
1909 unsigned long event, void *ptr)
1910 {
1911 struct net_device *dev = ptr;
1912
1913 if (!net_eq(dev_net(dev), &init_net) || pktgen_exiting)
1914 return NOTIFY_DONE;
1915
1916 /* It is OK that we do not hold the group lock right now,
1917 * as we run under the RTNL lock.
1918 */
1919
1920 switch (event) {
1921 case NETDEV_CHANGENAME:
1922 pktgen_change_name(dev);
1923 break;
1924
1925 case NETDEV_UNREGISTER:
1926 pktgen_mark_device(dev->name);
1927 break;
1928 }
1929
1930 return NOTIFY_DONE;
1931 }
1932
1933 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev,
1934 const char *ifname)
1935 {
1936 char b[IFNAMSIZ+5];
1937 int i;
1938
1939 for (i = 0; ifname[i] != '@'; i++) {
1940 if (i == IFNAMSIZ)
1941 break;
1942
1943 b[i] = ifname[i];
1944 }
1945 b[i] = 0;
1946
1947 return dev_get_by_name(&init_net, b);
1948 }
1949
1950
1951 /* Associate pktgen_dev with a device. */
1952
1953 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1954 {
1955 struct net_device *odev;
1956 int err;
1957
1958 /* Clean old setups */
1959 if (pkt_dev->odev) {
1960 dev_put(pkt_dev->odev);
1961 pkt_dev->odev = NULL;
1962 }
1963
1964 odev = pktgen_dev_get_by_name(pkt_dev, ifname);
1965 if (!odev) {
1966 pr_err("no such netdevice: \"%s\"\n", ifname);
1967 return -ENODEV;
1968 }
1969
1970 if (odev->type != ARPHRD_ETHER) {
1971 pr_err("not an ethernet device: \"%s\"\n", ifname);
1972 err = -EINVAL;
1973 } else if (!netif_running(odev)) {
1974 pr_err("device is down: \"%s\"\n", ifname);
1975 err = -ENETDOWN;
1976 } else {
1977 pkt_dev->odev = odev;
1978 return 0;
1979 }
1980
1981 dev_put(odev);
1982 return err;
1983 }
1984
1985 /* Read pkt_dev from the interface and set up internal pktgen_dev
1986 * structure to have the right information to create/send packets
1987 */
1988 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
1989 {
1990 int ntxq;
1991
1992 if (!pkt_dev->odev) {
1993 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
1994 sprintf(pkt_dev->result,
1995 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1996 return;
1997 }
1998
1999 /* make sure that we don't pick a non-existing transmit queue */
2000 ntxq = pkt_dev->odev->real_num_tx_queues;
2001
2002 if (ntxq <= pkt_dev->queue_map_min) {
2003 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2004 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2005 pkt_dev->odevname);
2006 pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2007 }
2008 if (pkt_dev->queue_map_max >= ntxq) {
2009 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2010 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2011 pkt_dev->odevname);
2012 pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2013 }
2014
2015 /* Default to the interface's mac if not explicitly set. */
2016
2017 if (is_zero_ether_addr(pkt_dev->src_mac))
2018 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2019
2020 /* Set up Dest MAC */
2021 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2022
2023 if (pkt_dev->flags & F_IPV6) {
2024 int i, set = 0, err = 1;
2025 struct inet6_dev *idev;
2026
2027 if (pkt_dev->min_pkt_size == 0) {
2028 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
2029 + sizeof(struct udphdr)
2030 + sizeof(struct pktgen_hdr)
2031 + pkt_dev->pkt_overhead;
2032 }
2033
2034 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2035 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2036 set = 1;
2037 break;
2038 }
2039
2040 if (!set) {
2041
2042 /*
2043 * Use linklevel address if unconfigured.
2044 *
2045 * use ipv6_get_lladdr if/when it's get exported
2046 */
2047
2048 rcu_read_lock();
2049 idev = __in6_dev_get(pkt_dev->odev);
2050 if (idev) {
2051 struct inet6_ifaddr *ifp;
2052
2053 read_lock_bh(&idev->lock);
2054 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2055 if ((ifp->scope & IFA_LINK) &&
2056 !(ifp->flags & IFA_F_TENTATIVE)) {
2057 pkt_dev->cur_in6_saddr = ifp->addr;
2058 err = 0;
2059 break;
2060 }
2061 }
2062 read_unlock_bh(&idev->lock);
2063 }
2064 rcu_read_unlock();
2065 if (err)
2066 pr_err("ERROR: IPv6 link address not available\n");
2067 }
2068 } else {
2069 if (pkt_dev->min_pkt_size == 0) {
2070 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
2071 + sizeof(struct udphdr)
2072 + sizeof(struct pktgen_hdr)
2073 + pkt_dev->pkt_overhead;
2074 }
2075
2076 pkt_dev->saddr_min = 0;
2077 pkt_dev->saddr_max = 0;
2078 if (strlen(pkt_dev->src_min) == 0) {
2079
2080 struct in_device *in_dev;
2081
2082 rcu_read_lock();
2083 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2084 if (in_dev) {
2085 if (in_dev->ifa_list) {
2086 pkt_dev->saddr_min =
2087 in_dev->ifa_list->ifa_address;
2088 pkt_dev->saddr_max = pkt_dev->saddr_min;
2089 }
2090 }
2091 rcu_read_unlock();
2092 } else {
2093 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2094 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2095 }
2096
2097 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2098 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2099 }
2100 /* Initialize current values. */
2101 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2102 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
2103 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
2104
2105 pkt_dev->cur_dst_mac_offset = 0;
2106 pkt_dev->cur_src_mac_offset = 0;
2107 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2108 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2109 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2110 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2111 pkt_dev->nflows = 0;
2112 }
2113
2114
2115 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2116 {
2117 ktime_t start_time, end_time;
2118 s64 remaining;
2119 struct hrtimer_sleeper t;
2120
2121 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2122 hrtimer_set_expires(&t.timer, spin_until);
2123
2124 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2125 if (remaining <= 0) {
2126 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2127 return;
2128 }
2129
2130 start_time = ktime_get();
2131 if (remaining < 100000) {
2132 /* for small delays (<100us), just loop until limit is reached */
2133 do {
2134 end_time = ktime_get();
2135 } while (ktime_compare(end_time, spin_until) < 0);
2136 } else {
2137 /* see do_nanosleep */
2138 hrtimer_init_sleeper(&t, current);
2139 do {
2140 set_current_state(TASK_INTERRUPTIBLE);
2141 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2142 if (!hrtimer_active(&t.timer))
2143 t.task = NULL;
2144
2145 if (likely(t.task))
2146 schedule();
2147
2148 hrtimer_cancel(&t.timer);
2149 } while (t.task && pkt_dev->running && !signal_pending(current));
2150 __set_current_state(TASK_RUNNING);
2151 end_time = ktime_get();
2152 }
2153
2154 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2155 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2156 }
2157
2158 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2159 {
2160 pkt_dev->pkt_overhead = 0;
2161 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2162 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2163 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2164 }
2165
2166 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2167 {
2168 return !!(pkt_dev->flows[flow].flags & F_INIT);
2169 }
2170
2171 static inline int f_pick(struct pktgen_dev *pkt_dev)
2172 {
2173 int flow = pkt_dev->curfl;
2174
2175 if (pkt_dev->flags & F_FLOW_SEQ) {
2176 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2177 /* reset time */
2178 pkt_dev->flows[flow].count = 0;
2179 pkt_dev->flows[flow].flags = 0;
2180 pkt_dev->curfl += 1;
2181 if (pkt_dev->curfl >= pkt_dev->cflows)
2182 pkt_dev->curfl = 0; /*reset */
2183 }
2184 } else {
2185 flow = random32() % pkt_dev->cflows;
2186 pkt_dev->curfl = flow;
2187
2188 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2189 pkt_dev->flows[flow].count = 0;
2190 pkt_dev->flows[flow].flags = 0;
2191 }
2192 }
2193
2194 return pkt_dev->curfl;
2195 }
2196
2197
2198 #ifdef CONFIG_XFRM
2199 /* If there was already an IPSEC SA, we keep it as is, else
2200 * we go look for it ...
2201 */
2202 #define DUMMY_MARK 0
2203 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2204 {
2205 struct xfrm_state *x = pkt_dev->flows[flow].x;
2206 if (!x) {
2207 /*slow path: we dont already have xfrm_state*/
2208 x = xfrm_stateonly_find(&init_net, DUMMY_MARK,
2209 (xfrm_address_t *)&pkt_dev->cur_daddr,
2210 (xfrm_address_t *)&pkt_dev->cur_saddr,
2211 AF_INET,
2212 pkt_dev->ipsmode,
2213 pkt_dev->ipsproto, 0);
2214 if (x) {
2215 pkt_dev->flows[flow].x = x;
2216 set_pkt_overhead(pkt_dev);
2217 pkt_dev->pkt_overhead += x->props.header_len;
2218 }
2219
2220 }
2221 }
2222 #endif
2223 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2224 {
2225
2226 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2227 pkt_dev->cur_queue_map = smp_processor_id();
2228
2229 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2230 __u16 t;
2231 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2232 t = random32() %
2233 (pkt_dev->queue_map_max -
2234 pkt_dev->queue_map_min + 1)
2235 + pkt_dev->queue_map_min;
2236 } else {
2237 t = pkt_dev->cur_queue_map + 1;
2238 if (t > pkt_dev->queue_map_max)
2239 t = pkt_dev->queue_map_min;
2240 }
2241 pkt_dev->cur_queue_map = t;
2242 }
2243 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2244 }
2245
2246 /* Increment/randomize headers according to flags and current values
2247 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2248 */
2249 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2250 {
2251 __u32 imn;
2252 __u32 imx;
2253 int flow = 0;
2254
2255 if (pkt_dev->cflows)
2256 flow = f_pick(pkt_dev);
2257
2258 /* Deal with source MAC */
2259 if (pkt_dev->src_mac_count > 1) {
2260 __u32 mc;
2261 __u32 tmp;
2262
2263 if (pkt_dev->flags & F_MACSRC_RND)
2264 mc = random32() % pkt_dev->src_mac_count;
2265 else {
2266 mc = pkt_dev->cur_src_mac_offset++;
2267 if (pkt_dev->cur_src_mac_offset >=
2268 pkt_dev->src_mac_count)
2269 pkt_dev->cur_src_mac_offset = 0;
2270 }
2271
2272 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2273 pkt_dev->hh[11] = tmp;
2274 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2275 pkt_dev->hh[10] = tmp;
2276 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2277 pkt_dev->hh[9] = tmp;
2278 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2279 pkt_dev->hh[8] = tmp;
2280 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2281 pkt_dev->hh[7] = tmp;
2282 }
2283
2284 /* Deal with Destination MAC */
2285 if (pkt_dev->dst_mac_count > 1) {
2286 __u32 mc;
2287 __u32 tmp;
2288
2289 if (pkt_dev->flags & F_MACDST_RND)
2290 mc = random32() % pkt_dev->dst_mac_count;
2291
2292 else {
2293 mc = pkt_dev->cur_dst_mac_offset++;
2294 if (pkt_dev->cur_dst_mac_offset >=
2295 pkt_dev->dst_mac_count) {
2296 pkt_dev->cur_dst_mac_offset = 0;
2297 }
2298 }
2299
2300 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2301 pkt_dev->hh[5] = tmp;
2302 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2303 pkt_dev->hh[4] = tmp;
2304 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2305 pkt_dev->hh[3] = tmp;
2306 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2307 pkt_dev->hh[2] = tmp;
2308 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2309 pkt_dev->hh[1] = tmp;
2310 }
2311
2312 if (pkt_dev->flags & F_MPLS_RND) {
2313 unsigned int i;
2314 for (i = 0; i < pkt_dev->nr_labels; i++)
2315 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2316 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2317 ((__force __be32)random32() &
2318 htonl(0x000fffff));
2319 }
2320
2321 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2322 pkt_dev->vlan_id = random32() & (4096-1);
2323 }
2324
2325 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2326 pkt_dev->svlan_id = random32() & (4096 - 1);
2327 }
2328
2329 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2330 if (pkt_dev->flags & F_UDPSRC_RND)
2331 pkt_dev->cur_udp_src = random32() %
2332 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2333 + pkt_dev->udp_src_min;
2334
2335 else {
2336 pkt_dev->cur_udp_src++;
2337 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2338 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2339 }
2340 }
2341
2342 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2343 if (pkt_dev->flags & F_UDPDST_RND) {
2344 pkt_dev->cur_udp_dst = random32() %
2345 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2346 + pkt_dev->udp_dst_min;
2347 } else {
2348 pkt_dev->cur_udp_dst++;
2349 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2350 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2351 }
2352 }
2353
2354 if (!(pkt_dev->flags & F_IPV6)) {
2355
2356 imn = ntohl(pkt_dev->saddr_min);
2357 imx = ntohl(pkt_dev->saddr_max);
2358 if (imn < imx) {
2359 __u32 t;
2360 if (pkt_dev->flags & F_IPSRC_RND)
2361 t = random32() % (imx - imn) + imn;
2362 else {
2363 t = ntohl(pkt_dev->cur_saddr);
2364 t++;
2365 if (t > imx)
2366 t = imn;
2367
2368 }
2369 pkt_dev->cur_saddr = htonl(t);
2370 }
2371
2372 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2373 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2374 } else {
2375 imn = ntohl(pkt_dev->daddr_min);
2376 imx = ntohl(pkt_dev->daddr_max);
2377 if (imn < imx) {
2378 __u32 t;
2379 __be32 s;
2380 if (pkt_dev->flags & F_IPDST_RND) {
2381
2382 t = random32() % (imx - imn) + imn;
2383 s = htonl(t);
2384
2385 while (ipv4_is_loopback(s) ||
2386 ipv4_is_multicast(s) ||
2387 ipv4_is_lbcast(s) ||
2388 ipv4_is_zeronet(s) ||
2389 ipv4_is_local_multicast(s)) {
2390 t = random32() % (imx - imn) + imn;
2391 s = htonl(t);
2392 }
2393 pkt_dev->cur_daddr = s;
2394 } else {
2395 t = ntohl(pkt_dev->cur_daddr);
2396 t++;
2397 if (t > imx) {
2398 t = imn;
2399 }
2400 pkt_dev->cur_daddr = htonl(t);
2401 }
2402 }
2403 if (pkt_dev->cflows) {
2404 pkt_dev->flows[flow].flags |= F_INIT;
2405 pkt_dev->flows[flow].cur_daddr =
2406 pkt_dev->cur_daddr;
2407 #ifdef CONFIG_XFRM
2408 if (pkt_dev->flags & F_IPSEC_ON)
2409 get_ipsec_sa(pkt_dev, flow);
2410 #endif
2411 pkt_dev->nflows++;
2412 }
2413 }
2414 } else { /* IPV6 * */
2415
2416 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
2417 int i;
2418
2419 /* Only random destinations yet */
2420
2421 for (i = 0; i < 4; i++) {
2422 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2423 (((__force __be32)random32() |
2424 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2425 pkt_dev->max_in6_daddr.s6_addr32[i]);
2426 }
2427 }
2428 }
2429
2430 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2431 __u32 t;
2432 if (pkt_dev->flags & F_TXSIZE_RND) {
2433 t = random32() %
2434 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2435 + pkt_dev->min_pkt_size;
2436 } else {
2437 t = pkt_dev->cur_pkt_size + 1;
2438 if (t > pkt_dev->max_pkt_size)
2439 t = pkt_dev->min_pkt_size;
2440 }
2441 pkt_dev->cur_pkt_size = t;
2442 }
2443
2444 set_cur_queue_map(pkt_dev);
2445
2446 pkt_dev->flows[flow].count++;
2447 }
2448
2449
2450 #ifdef CONFIG_XFRM
2451 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2452 {
2453 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2454 int err = 0;
2455
2456 if (!x)
2457 return 0;
2458 /* XXX: we dont support tunnel mode for now until
2459 * we resolve the dst issue */
2460 if (x->props.mode != XFRM_MODE_TRANSPORT)
2461 return 0;
2462
2463 spin_lock(&x->lock);
2464
2465 err = x->outer_mode->output(x, skb);
2466 if (err)
2467 goto error;
2468 err = x->type->output(x, skb);
2469 if (err)
2470 goto error;
2471
2472 x->curlft.bytes += skb->len;
2473 x->curlft.packets++;
2474 error:
2475 spin_unlock(&x->lock);
2476 return err;
2477 }
2478
2479 static void free_SAs(struct pktgen_dev *pkt_dev)
2480 {
2481 if (pkt_dev->cflows) {
2482 /* let go of the SAs if we have them */
2483 int i;
2484 for (i = 0; i < pkt_dev->cflows; i++) {
2485 struct xfrm_state *x = pkt_dev->flows[i].x;
2486 if (x) {
2487 xfrm_state_put(x);
2488 pkt_dev->flows[i].x = NULL;
2489 }
2490 }
2491 }
2492 }
2493
2494 static int process_ipsec(struct pktgen_dev *pkt_dev,
2495 struct sk_buff *skb, __be16 protocol)
2496 {
2497 if (pkt_dev->flags & F_IPSEC_ON) {
2498 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2499 int nhead = 0;
2500 if (x) {
2501 int ret;
2502 __u8 *eth;
2503 nhead = x->props.header_len - skb_headroom(skb);
2504 if (nhead > 0) {
2505 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2506 if (ret < 0) {
2507 pr_err("Error expanding ipsec packet %d\n",
2508 ret);
2509 goto err;
2510 }
2511 }
2512
2513 /* ipsec is not expecting ll header */
2514 skb_pull(skb, ETH_HLEN);
2515 ret = pktgen_output_ipsec(skb, pkt_dev);
2516 if (ret) {
2517 pr_err("Error creating ipsec packet %d\n", ret);
2518 goto err;
2519 }
2520 /* restore ll */
2521 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2522 memcpy(eth, pkt_dev->hh, 12);
2523 *(u16 *) &eth[12] = protocol;
2524 }
2525 }
2526 return 1;
2527 err:
2528 kfree_skb(skb);
2529 return 0;
2530 }
2531 #endif
2532
2533 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2534 {
2535 unsigned int i;
2536 for (i = 0; i < pkt_dev->nr_labels; i++)
2537 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2538
2539 mpls--;
2540 *mpls |= MPLS_STACK_BOTTOM;
2541 }
2542
2543 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2544 unsigned int prio)
2545 {
2546 return htons(id | (cfi << 12) | (prio << 13));
2547 }
2548
2549 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2550 int datalen)
2551 {
2552 struct timeval timestamp;
2553 struct pktgen_hdr *pgh;
2554
2555 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
2556 datalen -= sizeof(*pgh);
2557
2558 if (pkt_dev->nfrags <= 0) {
2559 memset(skb_put(skb, datalen), 0, datalen);
2560 } else {
2561 int frags = pkt_dev->nfrags;
2562 int i, len;
2563 int frag_len;
2564
2565
2566 if (frags > MAX_SKB_FRAGS)
2567 frags = MAX_SKB_FRAGS;
2568 len = datalen - frags * PAGE_SIZE;
2569 if (len > 0) {
2570 memset(skb_put(skb, len), 0, len);
2571 datalen = frags * PAGE_SIZE;
2572 }
2573
2574 i = 0;
2575 frag_len = (datalen/frags) < PAGE_SIZE ?
2576 (datalen/frags) : PAGE_SIZE;
2577 while (datalen > 0) {
2578 if (unlikely(!pkt_dev->page)) {
2579 int node = numa_node_id();
2580
2581 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2582 node = pkt_dev->node;
2583 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2584 if (!pkt_dev->page)
2585 break;
2586 }
2587 get_page(pkt_dev->page);
2588 skb_frag_set_page(skb, i, pkt_dev->page);
2589 skb_shinfo(skb)->frags[i].page_offset = 0;
2590 /*last fragment, fill rest of data*/
2591 if (i == (frags - 1))
2592 skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2593 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2594 else
2595 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2596 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2597 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2598 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2599 i++;
2600 skb_shinfo(skb)->nr_frags = i;
2601 }
2602 }
2603
2604 /* Stamp the time, and sequence number,
2605 * convert them to network byte order
2606 */
2607 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2608 pgh->seq_num = htonl(pkt_dev->seq_num);
2609
2610 do_gettimeofday(&timestamp);
2611 pgh->tv_sec = htonl(timestamp.tv_sec);
2612 pgh->tv_usec = htonl(timestamp.tv_usec);
2613 }
2614
2615 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2616 struct pktgen_dev *pkt_dev)
2617 {
2618 struct sk_buff *skb = NULL;
2619 __u8 *eth;
2620 struct udphdr *udph;
2621 int datalen, iplen;
2622 struct iphdr *iph;
2623 __be16 protocol = htons(ETH_P_IP);
2624 __be32 *mpls;
2625 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2626 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2627 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2628 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2629 u16 queue_map;
2630
2631 if (pkt_dev->nr_labels)
2632 protocol = htons(ETH_P_MPLS_UC);
2633
2634 if (pkt_dev->vlan_id != 0xffff)
2635 protocol = htons(ETH_P_8021Q);
2636
2637 /* Update any of the values, used when we're incrementing various
2638 * fields.
2639 */
2640 mod_cur_headers(pkt_dev);
2641 queue_map = pkt_dev->cur_queue_map;
2642
2643 datalen = (odev->hard_header_len + 16) & ~0xf;
2644
2645 if (pkt_dev->flags & F_NODE) {
2646 int node;
2647
2648 if (pkt_dev->node >= 0)
2649 node = pkt_dev->node;
2650 else
2651 node = numa_node_id();
2652
2653 skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64
2654 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node);
2655 if (likely(skb)) {
2656 skb_reserve(skb, NET_SKB_PAD);
2657 skb->dev = odev;
2658 }
2659 }
2660 else
2661 skb = __netdev_alloc_skb(odev,
2662 pkt_dev->cur_pkt_size + 64
2663 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2664
2665 if (!skb) {
2666 sprintf(pkt_dev->result, "No memory");
2667 return NULL;
2668 }
2669 prefetchw(skb->data);
2670
2671 skb_reserve(skb, datalen);
2672
2673 /* Reserve for ethernet and IP header */
2674 eth = (__u8 *) skb_push(skb, 14);
2675 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2676 if (pkt_dev->nr_labels)
2677 mpls_push(mpls, pkt_dev);
2678
2679 if (pkt_dev->vlan_id != 0xffff) {
2680 if (pkt_dev->svlan_id != 0xffff) {
2681 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2682 *svlan_tci = build_tci(pkt_dev->svlan_id,
2683 pkt_dev->svlan_cfi,
2684 pkt_dev->svlan_p);
2685 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2686 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2687 }
2688 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2689 *vlan_tci = build_tci(pkt_dev->vlan_id,
2690 pkt_dev->vlan_cfi,
2691 pkt_dev->vlan_p);
2692 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2693 *vlan_encapsulated_proto = htons(ETH_P_IP);
2694 }
2695
2696 skb->network_header = skb->tail;
2697 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2698 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2699 skb_set_queue_mapping(skb, queue_map);
2700 skb->priority = pkt_dev->skb_priority;
2701
2702 iph = ip_hdr(skb);
2703 udph = udp_hdr(skb);
2704
2705 memcpy(eth, pkt_dev->hh, 12);
2706 *(__be16 *) & eth[12] = protocol;
2707
2708 /* Eth + IPh + UDPh + mpls */
2709 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2710 pkt_dev->pkt_overhead;
2711 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
2712 datalen = sizeof(struct pktgen_hdr);
2713
2714 udph->source = htons(pkt_dev->cur_udp_src);
2715 udph->dest = htons(pkt_dev->cur_udp_dst);
2716 udph->len = htons(datalen + 8); /* DATA + udphdr */
2717 udph->check = 0; /* No checksum */
2718
2719 iph->ihl = 5;
2720 iph->version = 4;
2721 iph->ttl = 32;
2722 iph->tos = pkt_dev->tos;
2723 iph->protocol = IPPROTO_UDP; /* UDP */
2724 iph->saddr = pkt_dev->cur_saddr;
2725 iph->daddr = pkt_dev->cur_daddr;
2726 iph->id = htons(pkt_dev->ip_id);
2727 pkt_dev->ip_id++;
2728 iph->frag_off = 0;
2729 iplen = 20 + 8 + datalen;
2730 iph->tot_len = htons(iplen);
2731 iph->check = 0;
2732 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2733 skb->protocol = protocol;
2734 skb->mac_header = (skb->network_header - ETH_HLEN -
2735 pkt_dev->pkt_overhead);
2736 skb->dev = odev;
2737 skb->pkt_type = PACKET_HOST;
2738 pktgen_finalize_skb(pkt_dev, skb, datalen);
2739
2740 #ifdef CONFIG_XFRM
2741 if (!process_ipsec(pkt_dev, skb, protocol))
2742 return NULL;
2743 #endif
2744
2745 return skb;
2746 }
2747
2748 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2749 struct pktgen_dev *pkt_dev)
2750 {
2751 struct sk_buff *skb = NULL;
2752 __u8 *eth;
2753 struct udphdr *udph;
2754 int datalen;
2755 struct ipv6hdr *iph;
2756 __be16 protocol = htons(ETH_P_IPV6);
2757 __be32 *mpls;
2758 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2759 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2760 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2761 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2762 u16 queue_map;
2763
2764 if (pkt_dev->nr_labels)
2765 protocol = htons(ETH_P_MPLS_UC);
2766
2767 if (pkt_dev->vlan_id != 0xffff)
2768 protocol = htons(ETH_P_8021Q);
2769
2770 /* Update any of the values, used when we're incrementing various
2771 * fields.
2772 */
2773 mod_cur_headers(pkt_dev);
2774 queue_map = pkt_dev->cur_queue_map;
2775
2776 skb = __netdev_alloc_skb(odev,
2777 pkt_dev->cur_pkt_size + 64
2778 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
2779 if (!skb) {
2780 sprintf(pkt_dev->result, "No memory");
2781 return NULL;
2782 }
2783 prefetchw(skb->data);
2784
2785 skb_reserve(skb, 16);
2786
2787 /* Reserve for ethernet and IP header */
2788 eth = (__u8 *) skb_push(skb, 14);
2789 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2790 if (pkt_dev->nr_labels)
2791 mpls_push(mpls, pkt_dev);
2792
2793 if (pkt_dev->vlan_id != 0xffff) {
2794 if (pkt_dev->svlan_id != 0xffff) {
2795 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2796 *svlan_tci = build_tci(pkt_dev->svlan_id,
2797 pkt_dev->svlan_cfi,
2798 pkt_dev->svlan_p);
2799 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2800 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2801 }
2802 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2803 *vlan_tci = build_tci(pkt_dev->vlan_id,
2804 pkt_dev->vlan_cfi,
2805 pkt_dev->vlan_p);
2806 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2807 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2808 }
2809
2810 skb->network_header = skb->tail;
2811 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2812 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2813 skb_set_queue_mapping(skb, queue_map);
2814 skb->priority = pkt_dev->skb_priority;
2815 iph = ipv6_hdr(skb);
2816 udph = udp_hdr(skb);
2817
2818 memcpy(eth, pkt_dev->hh, 12);
2819 *(__be16 *) &eth[12] = protocol;
2820
2821 /* Eth + IPh + UDPh + mpls */
2822 datalen = pkt_dev->cur_pkt_size - 14 -
2823 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2824 pkt_dev->pkt_overhead;
2825
2826 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
2827 datalen = sizeof(struct pktgen_hdr);
2828 net_info_ratelimited("increased datalen to %d\n", datalen);
2829 }
2830
2831 udph->source = htons(pkt_dev->cur_udp_src);
2832 udph->dest = htons(pkt_dev->cur_udp_dst);
2833 udph->len = htons(datalen + sizeof(struct udphdr));
2834 udph->check = 0; /* No checksum */
2835
2836 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2837
2838 if (pkt_dev->traffic_class) {
2839 /* Version + traffic class + flow (0) */
2840 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2841 }
2842
2843 iph->hop_limit = 32;
2844
2845 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2846 iph->nexthdr = IPPROTO_UDP;
2847
2848 iph->daddr = pkt_dev->cur_in6_daddr;
2849 iph->saddr = pkt_dev->cur_in6_saddr;
2850
2851 skb->mac_header = (skb->network_header - ETH_HLEN -
2852 pkt_dev->pkt_overhead);
2853 skb->protocol = protocol;
2854 skb->dev = odev;
2855 skb->pkt_type = PACKET_HOST;
2856
2857 pktgen_finalize_skb(pkt_dev, skb, datalen);
2858
2859 return skb;
2860 }
2861
2862 static struct sk_buff *fill_packet(struct net_device *odev,
2863 struct pktgen_dev *pkt_dev)
2864 {
2865 if (pkt_dev->flags & F_IPV6)
2866 return fill_packet_ipv6(odev, pkt_dev);
2867 else
2868 return fill_packet_ipv4(odev, pkt_dev);
2869 }
2870
2871 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2872 {
2873 pkt_dev->seq_num = 1;
2874 pkt_dev->idle_acc = 0;
2875 pkt_dev->sofar = 0;
2876 pkt_dev->tx_bytes = 0;
2877 pkt_dev->errors = 0;
2878 }
2879
2880 /* Set up structure for sending pkts, clear counters */
2881
2882 static void pktgen_run(struct pktgen_thread *t)
2883 {
2884 struct pktgen_dev *pkt_dev;
2885 int started = 0;
2886
2887 func_enter();
2888
2889 if_lock(t);
2890 list_for_each_entry(pkt_dev, &t->if_list, list) {
2891
2892 /*
2893 * setup odev and create initial packet.
2894 */
2895 pktgen_setup_inject(pkt_dev);
2896
2897 if (pkt_dev->odev) {
2898 pktgen_clear_counters(pkt_dev);
2899 pkt_dev->running = 1; /* Cranke yeself! */
2900 pkt_dev->skb = NULL;
2901 pkt_dev->started_at = pkt_dev->next_tx = ktime_get();
2902
2903 set_pkt_overhead(pkt_dev);
2904
2905 strcpy(pkt_dev->result, "Starting");
2906 started++;
2907 } else
2908 strcpy(pkt_dev->result, "Error starting");
2909 }
2910 if_unlock(t);
2911 if (started)
2912 t->control &= ~(T_STOP);
2913 }
2914
2915 static void pktgen_stop_all_threads_ifs(void)
2916 {
2917 struct pktgen_thread *t;
2918
2919 func_enter();
2920
2921 mutex_lock(&pktgen_thread_lock);
2922
2923 list_for_each_entry(t, &pktgen_threads, th_list)
2924 t->control |= T_STOP;
2925
2926 mutex_unlock(&pktgen_thread_lock);
2927 }
2928
2929 static int thread_is_running(const struct pktgen_thread *t)
2930 {
2931 const struct pktgen_dev *pkt_dev;
2932
2933 list_for_each_entry(pkt_dev, &t->if_list, list)
2934 if (pkt_dev->running)
2935 return 1;
2936 return 0;
2937 }
2938
2939 static int pktgen_wait_thread_run(struct pktgen_thread *t)
2940 {
2941 if_lock(t);
2942
2943 while (thread_is_running(t)) {
2944
2945 if_unlock(t);
2946
2947 msleep_interruptible(100);
2948
2949 if (signal_pending(current))
2950 goto signal;
2951 if_lock(t);
2952 }
2953 if_unlock(t);
2954 return 1;
2955 signal:
2956 return 0;
2957 }
2958
2959 static int pktgen_wait_all_threads_run(void)
2960 {
2961 struct pktgen_thread *t;
2962 int sig = 1;
2963
2964 mutex_lock(&pktgen_thread_lock);
2965
2966 list_for_each_entry(t, &pktgen_threads, th_list) {
2967 sig = pktgen_wait_thread_run(t);
2968 if (sig == 0)
2969 break;
2970 }
2971
2972 if (sig == 0)
2973 list_for_each_entry(t, &pktgen_threads, th_list)
2974 t->control |= (T_STOP);
2975
2976 mutex_unlock(&pktgen_thread_lock);
2977 return sig;
2978 }
2979
2980 static void pktgen_run_all_threads(void)
2981 {
2982 struct pktgen_thread *t;
2983
2984 func_enter();
2985
2986 mutex_lock(&pktgen_thread_lock);
2987
2988 list_for_each_entry(t, &pktgen_threads, th_list)
2989 t->control |= (T_RUN);
2990
2991 mutex_unlock(&pktgen_thread_lock);
2992
2993 /* Propagate thread->control */
2994 schedule_timeout_interruptible(msecs_to_jiffies(125));
2995
2996 pktgen_wait_all_threads_run();
2997 }
2998
2999 static void pktgen_reset_all_threads(void)
3000 {
3001 struct pktgen_thread *t;
3002
3003 func_enter();
3004
3005 mutex_lock(&pktgen_thread_lock);
3006
3007 list_for_each_entry(t, &pktgen_threads, th_list)
3008 t->control |= (T_REMDEVALL);
3009
3010 mutex_unlock(&pktgen_thread_lock);
3011
3012 /* Propagate thread->control */
3013 schedule_timeout_interruptible(msecs_to_jiffies(125));
3014
3015 pktgen_wait_all_threads_run();
3016 }
3017
3018 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3019 {
3020 __u64 bps, mbps, pps;
3021 char *p = pkt_dev->result;
3022 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3023 pkt_dev->started_at);
3024 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3025
3026 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3027 (unsigned long long)ktime_to_us(elapsed),
3028 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3029 (unsigned long long)ktime_to_us(idle),
3030 (unsigned long long)pkt_dev->sofar,
3031 pkt_dev->cur_pkt_size, nr_frags);
3032
3033 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3034 ktime_to_ns(elapsed));
3035
3036 bps = pps * 8 * pkt_dev->cur_pkt_size;
3037
3038 mbps = bps;
3039 do_div(mbps, 1000000);
3040 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3041 (unsigned long long)pps,
3042 (unsigned long long)mbps,
3043 (unsigned long long)bps,
3044 (unsigned long long)pkt_dev->errors);
3045 }
3046
3047 /* Set stopped-at timer, remove from running list, do counters & statistics */
3048 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3049 {
3050 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3051
3052 if (!pkt_dev->running) {
3053 pr_warning("interface: %s is already stopped\n",
3054 pkt_dev->odevname);
3055 return -EINVAL;
3056 }
3057
3058 kfree_skb(pkt_dev->skb);
3059 pkt_dev->skb = NULL;
3060 pkt_dev->stopped_at = ktime_get();
3061 pkt_dev->running = 0;
3062
3063 show_results(pkt_dev, nr_frags);
3064
3065 return 0;
3066 }
3067
3068 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3069 {
3070 struct pktgen_dev *pkt_dev, *best = NULL;
3071
3072 if_lock(t);
3073
3074 list_for_each_entry(pkt_dev, &t->if_list, list) {
3075 if (!pkt_dev->running)
3076 continue;
3077 if (best == NULL)
3078 best = pkt_dev;
3079 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0)
3080 best = pkt_dev;
3081 }
3082 if_unlock(t);
3083 return best;
3084 }
3085
3086 static void pktgen_stop(struct pktgen_thread *t)
3087 {
3088 struct pktgen_dev *pkt_dev;
3089
3090 func_enter();
3091
3092 if_lock(t);
3093
3094 list_for_each_entry(pkt_dev, &t->if_list, list) {
3095 pktgen_stop_device(pkt_dev);
3096 }
3097
3098 if_unlock(t);
3099 }
3100
3101 /*
3102 * one of our devices needs to be removed - find it
3103 * and remove it
3104 */
3105 static void pktgen_rem_one_if(struct pktgen_thread *t)
3106 {
3107 struct list_head *q, *n;
3108 struct pktgen_dev *cur;
3109
3110 func_enter();
3111
3112 if_lock(t);
3113
3114 list_for_each_safe(q, n, &t->if_list) {
3115 cur = list_entry(q, struct pktgen_dev, list);
3116
3117 if (!cur->removal_mark)
3118 continue;
3119
3120 kfree_skb(cur->skb);
3121 cur->skb = NULL;
3122
3123 pktgen_remove_device(t, cur);
3124
3125 break;
3126 }
3127
3128 if_unlock(t);
3129 }
3130
3131 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3132 {
3133 struct list_head *q, *n;
3134 struct pktgen_dev *cur;
3135
3136 func_enter();
3137
3138 /* Remove all devices, free mem */
3139
3140 if_lock(t);
3141
3142 list_for_each_safe(q, n, &t->if_list) {
3143 cur = list_entry(q, struct pktgen_dev, list);
3144
3145 kfree_skb(cur->skb);
3146 cur->skb = NULL;
3147
3148 pktgen_remove_device(t, cur);
3149 }
3150
3151 if_unlock(t);
3152 }
3153
3154 static void pktgen_rem_thread(struct pktgen_thread *t)
3155 {
3156 /* Remove from the thread list */
3157
3158 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3159
3160 }
3161
3162 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3163 {
3164 ktime_t idle_start = ktime_get();
3165 schedule();
3166 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3167 }
3168
3169 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3170 {
3171 ktime_t idle_start = ktime_get();
3172
3173 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3174 if (signal_pending(current))
3175 break;
3176
3177 if (need_resched())
3178 pktgen_resched(pkt_dev);
3179 else
3180 cpu_relax();
3181 }
3182 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3183 }
3184
3185 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3186 {
3187 struct net_device *odev = pkt_dev->odev;
3188 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3189 = odev->netdev_ops->ndo_start_xmit;
3190 struct netdev_queue *txq;
3191 u16 queue_map;
3192 int ret;
3193
3194 /* If device is offline, then don't send */
3195 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3196 pktgen_stop_device(pkt_dev);
3197 return;
3198 }
3199
3200 /* This is max DELAY, this has special meaning of
3201 * "never transmit"
3202 */
3203 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3204 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
3205 return;
3206 }
3207
3208 /* If no skb or clone count exhausted then get new one */
3209 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3210 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3211 /* build a new pkt */
3212 kfree_skb(pkt_dev->skb);
3213
3214 pkt_dev->skb = fill_packet(odev, pkt_dev);
3215 if (pkt_dev->skb == NULL) {
3216 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3217 schedule();
3218 pkt_dev->clone_count--; /* back out increment, OOM */
3219 return;
3220 }
3221 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3222 pkt_dev->allocated_skbs++;
3223 pkt_dev->clone_count = 0; /* reset counter */
3224 }
3225
3226 if (pkt_dev->delay && pkt_dev->last_ok)
3227 spin(pkt_dev, pkt_dev->next_tx);
3228
3229 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3230 txq = netdev_get_tx_queue(odev, queue_map);
3231
3232 __netif_tx_lock_bh(txq);
3233
3234 if (unlikely(netif_xmit_frozen_or_stopped(txq))) {
3235 ret = NETDEV_TX_BUSY;
3236 pkt_dev->last_ok = 0;
3237 goto unlock;
3238 }
3239 atomic_inc(&(pkt_dev->skb->users));
3240 ret = (*xmit)(pkt_dev->skb, odev);
3241
3242 switch (ret) {
3243 case NETDEV_TX_OK:
3244 txq_trans_update(txq);
3245 pkt_dev->last_ok = 1;
3246 pkt_dev->sofar++;
3247 pkt_dev->seq_num++;
3248 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3249 break;
3250 case NET_XMIT_DROP:
3251 case NET_XMIT_CN:
3252 case NET_XMIT_POLICED:
3253 /* skb has been consumed */
3254 pkt_dev->errors++;
3255 break;
3256 default: /* Drivers are not supposed to return other values! */
3257 net_info_ratelimited("%s xmit error: %d\n",
3258 pkt_dev->odevname, ret);
3259 pkt_dev->errors++;
3260 /* fallthru */
3261 case NETDEV_TX_LOCKED:
3262 case NETDEV_TX_BUSY:
3263 /* Retry it next time */
3264 atomic_dec(&(pkt_dev->skb->users));
3265 pkt_dev->last_ok = 0;
3266 }
3267 unlock:
3268 __netif_tx_unlock_bh(txq);
3269
3270 /* If pkt_dev->count is zero, then run forever */
3271 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3272 pktgen_wait_for_skb(pkt_dev);
3273
3274 /* Done with this */
3275 pktgen_stop_device(pkt_dev);
3276 }
3277 }
3278
3279 /*
3280 * Main loop of the thread goes here
3281 */
3282
3283 static int pktgen_thread_worker(void *arg)
3284 {
3285 DEFINE_WAIT(wait);
3286 struct pktgen_thread *t = arg;
3287 struct pktgen_dev *pkt_dev = NULL;
3288 int cpu = t->cpu;
3289
3290 BUG_ON(smp_processor_id() != cpu);
3291
3292 init_waitqueue_head(&t->queue);
3293 complete(&t->start_done);
3294
3295 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3296
3297 set_current_state(TASK_INTERRUPTIBLE);
3298
3299 set_freezable();
3300
3301 while (!kthread_should_stop()) {
3302 pkt_dev = next_to_run(t);
3303
3304 if (unlikely(!pkt_dev && t->control == 0)) {
3305 if (pktgen_exiting)
3306 break;
3307 wait_event_interruptible_timeout(t->queue,
3308 t->control != 0,
3309 HZ/10);
3310 try_to_freeze();
3311 continue;
3312 }
3313
3314 __set_current_state(TASK_RUNNING);
3315
3316 if (likely(pkt_dev)) {
3317 pktgen_xmit(pkt_dev);
3318
3319 if (need_resched())
3320 pktgen_resched(pkt_dev);
3321 else
3322 cpu_relax();
3323 }
3324
3325 if (t->control & T_STOP) {
3326 pktgen_stop(t);
3327 t->control &= ~(T_STOP);
3328 }
3329
3330 if (t->control & T_RUN) {
3331 pktgen_run(t);
3332 t->control &= ~(T_RUN);
3333 }
3334
3335 if (t->control & T_REMDEVALL) {
3336 pktgen_rem_all_ifs(t);
3337 t->control &= ~(T_REMDEVALL);
3338 }
3339
3340 if (t->control & T_REMDEV) {
3341 pktgen_rem_one_if(t);
3342 t->control &= ~(T_REMDEV);
3343 }
3344
3345 try_to_freeze();
3346
3347 set_current_state(TASK_INTERRUPTIBLE);
3348 }
3349
3350 pr_debug("%s stopping all device\n", t->tsk->comm);
3351 pktgen_stop(t);
3352
3353 pr_debug("%s removing all device\n", t->tsk->comm);
3354 pktgen_rem_all_ifs(t);
3355
3356 pr_debug("%s removing thread\n", t->tsk->comm);
3357 pktgen_rem_thread(t);
3358
3359 /* Wait for kthread_stop */
3360 while (!kthread_should_stop()) {
3361 set_current_state(TASK_INTERRUPTIBLE);
3362 schedule();
3363 }
3364 __set_current_state(TASK_RUNNING);
3365
3366 return 0;
3367 }
3368
3369 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3370 const char *ifname, bool exact)
3371 {
3372 struct pktgen_dev *p, *pkt_dev = NULL;
3373 size_t len = strlen(ifname);
3374
3375 if_lock(t);
3376 list_for_each_entry(p, &t->if_list, list)
3377 if (strncmp(p->odevname, ifname, len) == 0) {
3378 if (p->odevname[len]) {
3379 if (exact || p->odevname[len] != '@')
3380 continue;
3381 }
3382 pkt_dev = p;
3383 break;
3384 }
3385
3386 if_unlock(t);
3387 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3388 return pkt_dev;
3389 }
3390
3391 /*
3392 * Adds a dev at front of if_list.
3393 */
3394
3395 static int add_dev_to_thread(struct pktgen_thread *t,
3396 struct pktgen_dev *pkt_dev)
3397 {
3398 int rv = 0;
3399
3400 if_lock(t);
3401
3402 if (pkt_dev->pg_thread) {
3403 pr_err("ERROR: already assigned to a thread\n");
3404 rv = -EBUSY;
3405 goto out;
3406 }
3407
3408 list_add(&pkt_dev->list, &t->if_list);
3409 pkt_dev->pg_thread = t;
3410 pkt_dev->running = 0;
3411
3412 out:
3413 if_unlock(t);
3414 return rv;
3415 }
3416
3417 /* Called under thread lock */
3418
3419 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3420 {
3421 struct pktgen_dev *pkt_dev;
3422 int err;
3423 int node = cpu_to_node(t->cpu);
3424
3425 /* We don't allow a device to be on several threads */
3426
3427 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3428 if (pkt_dev) {
3429 pr_err("ERROR: interface already used\n");
3430 return -EBUSY;
3431 }
3432
3433 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3434 if (!pkt_dev)
3435 return -ENOMEM;
3436
3437 strcpy(pkt_dev->odevname, ifname);
3438 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3439 node);
3440 if (pkt_dev->flows == NULL) {
3441 kfree(pkt_dev);
3442 return -ENOMEM;
3443 }
3444
3445 pkt_dev->removal_mark = 0;
3446 pkt_dev->nfrags = 0;
3447 pkt_dev->delay = pg_delay_d;
3448 pkt_dev->count = pg_count_d;
3449 pkt_dev->sofar = 0;
3450 pkt_dev->udp_src_min = 9; /* sink port */
3451 pkt_dev->udp_src_max = 9;
3452 pkt_dev->udp_dst_min = 9;
3453 pkt_dev->udp_dst_max = 9;
3454 pkt_dev->vlan_p = 0;
3455 pkt_dev->vlan_cfi = 0;
3456 pkt_dev->vlan_id = 0xffff;
3457 pkt_dev->svlan_p = 0;
3458 pkt_dev->svlan_cfi = 0;
3459 pkt_dev->svlan_id = 0xffff;
3460 pkt_dev->node = -1;
3461
3462 err = pktgen_setup_dev(pkt_dev, ifname);
3463 if (err)
3464 goto out1;
3465 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3466 pkt_dev->clone_skb = pg_clone_skb_d;
3467
3468 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3469 &pktgen_if_fops, pkt_dev);
3470 if (!pkt_dev->entry) {
3471 pr_err("cannot create %s/%s procfs entry\n",
3472 PG_PROC_DIR, ifname);
3473 err = -EINVAL;
3474 goto out2;
3475 }
3476 #ifdef CONFIG_XFRM
3477 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3478 pkt_dev->ipsproto = IPPROTO_ESP;
3479 #endif
3480
3481 return add_dev_to_thread(t, pkt_dev);
3482 out2:
3483 dev_put(pkt_dev->odev);
3484 out1:
3485 #ifdef CONFIG_XFRM
3486 free_SAs(pkt_dev);
3487 #endif
3488 vfree(pkt_dev->flows);
3489 kfree(pkt_dev);
3490 return err;
3491 }
3492
3493 static int __init pktgen_create_thread(int cpu)
3494 {
3495 struct pktgen_thread *t;
3496 struct proc_dir_entry *pe;
3497 struct task_struct *p;
3498
3499 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3500 cpu_to_node(cpu));
3501 if (!t) {
3502 pr_err("ERROR: out of memory, can't create new thread\n");
3503 return -ENOMEM;
3504 }
3505
3506 spin_lock_init(&t->if_lock);
3507 t->cpu = cpu;
3508
3509 INIT_LIST_HEAD(&t->if_list);
3510
3511 list_add_tail(&t->th_list, &pktgen_threads);
3512 init_completion(&t->start_done);
3513
3514 p = kthread_create_on_node(pktgen_thread_worker,
3515 t,
3516 cpu_to_node(cpu),
3517 "kpktgend_%d", cpu);
3518 if (IS_ERR(p)) {
3519 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3520 list_del(&t->th_list);
3521 kfree(t);
3522 return PTR_ERR(p);
3523 }
3524 kthread_bind(p, cpu);
3525 t->tsk = p;
3526
3527 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3528 &pktgen_thread_fops, t);
3529 if (!pe) {
3530 pr_err("cannot create %s/%s procfs entry\n",
3531 PG_PROC_DIR, t->tsk->comm);
3532 kthread_stop(p);
3533 list_del(&t->th_list);
3534 kfree(t);
3535 return -EINVAL;
3536 }
3537
3538 wake_up_process(p);
3539 wait_for_completion(&t->start_done);
3540
3541 return 0;
3542 }
3543
3544 /*
3545 * Removes a device from the thread if_list.
3546 */
3547 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3548 struct pktgen_dev *pkt_dev)
3549 {
3550 struct list_head *q, *n;
3551 struct pktgen_dev *p;
3552
3553 list_for_each_safe(q, n, &t->if_list) {
3554 p = list_entry(q, struct pktgen_dev, list);
3555 if (p == pkt_dev)
3556 list_del(&p->list);
3557 }
3558 }
3559
3560 static int pktgen_remove_device(struct pktgen_thread *t,
3561 struct pktgen_dev *pkt_dev)
3562 {
3563
3564 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3565
3566 if (pkt_dev->running) {
3567 pr_warning("WARNING: trying to remove a running interface, stopping it now\n");
3568 pktgen_stop_device(pkt_dev);
3569 }
3570
3571 /* Dis-associate from the interface */
3572
3573 if (pkt_dev->odev) {
3574 dev_put(pkt_dev->odev);
3575 pkt_dev->odev = NULL;
3576 }
3577
3578 /* And update the thread if_list */
3579
3580 _rem_dev_from_if_list(t, pkt_dev);
3581
3582 if (pkt_dev->entry)
3583 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3584
3585 #ifdef CONFIG_XFRM
3586 free_SAs(pkt_dev);
3587 #endif
3588 vfree(pkt_dev->flows);
3589 if (pkt_dev->page)
3590 put_page(pkt_dev->page);
3591 kfree(pkt_dev);
3592 return 0;
3593 }
3594
3595 static int __init pg_init(void)
3596 {
3597 int cpu;
3598 struct proc_dir_entry *pe;
3599 int ret = 0;
3600
3601 pr_info("%s", version);
3602
3603 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3604 if (!pg_proc_dir)
3605 return -ENODEV;
3606
3607 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3608 if (pe == NULL) {
3609 pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL);
3610 ret = -EINVAL;
3611 goto remove_dir;
3612 }
3613
3614 register_netdevice_notifier(&pktgen_notifier_block);
3615
3616 for_each_online_cpu(cpu) {
3617 int err;
3618
3619 err = pktgen_create_thread(cpu);
3620 if (err)
3621 pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n",
3622 cpu, err);
3623 }
3624
3625 if (list_empty(&pktgen_threads)) {
3626 pr_err("ERROR: Initialization failed for all threads\n");
3627 ret = -ENODEV;
3628 goto unregister;
3629 }
3630
3631 return 0;
3632
3633 unregister:
3634 unregister_netdevice_notifier(&pktgen_notifier_block);
3635 remove_proc_entry(PGCTRL, pg_proc_dir);
3636 remove_dir:
3637 proc_net_remove(&init_net, PG_PROC_DIR);
3638 return ret;
3639 }
3640
3641 static void __exit pg_cleanup(void)
3642 {
3643 struct pktgen_thread *t;
3644 struct list_head *q, *n;
3645 LIST_HEAD(list);
3646
3647 /* Stop all interfaces & threads */
3648 pktgen_exiting = true;
3649
3650 mutex_lock(&pktgen_thread_lock);
3651 list_splice_init(&pktgen_threads, &list);
3652 mutex_unlock(&pktgen_thread_lock);
3653
3654 list_for_each_safe(q, n, &list) {
3655 t = list_entry(q, struct pktgen_thread, th_list);
3656 list_del(&t->th_list);
3657 kthread_stop(t->tsk);
3658 kfree(t);
3659 }
3660
3661 /* Un-register us from receiving netdevice events */
3662 unregister_netdevice_notifier(&pktgen_notifier_block);
3663
3664 /* Clean up proc file system */
3665 remove_proc_entry(PGCTRL, pg_proc_dir);
3666 proc_net_remove(&init_net, PG_PROC_DIR);
3667 }
3668
3669 module_init(pg_init);
3670 module_exit(pg_cleanup);
3671
3672 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3673 MODULE_DESCRIPTION("Packet Generator tool");
3674 MODULE_LICENSE("GPL");
3675 MODULE_VERSION(VERSION);
3676 module_param(pg_count_d, int, 0);
3677 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3678 module_param(pg_delay_d, int, 0);
3679 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3680 module_param(pg_clone_skb_d, int, 0);
3681 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3682 module_param(debug, int, 0);
3683 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree