?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
ARM: 6668/1: ptrace: remove single-step emulation code
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / core / pktgen.c
bloba9e7fc4c461fa6679c39a51b214d242e1c22b873
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 <net/net_namespace.h>
160 #include <net/checksum.h>
161 #include <net/ipv6.h>
162 #include <net/addrconf.h>
163 #ifdef CONFIG_XFRM
164 #include <net/xfrm.h>
165 #endif
166 #include <asm/byteorder.h>
167 #include <linux/rcupdate.h>
168 #include <linux/bitops.h>
169 #include <linux/io.h>
170 #include <linux/timex.h>
171 #include <linux/uaccess.h>
172 #include <asm/dma.h>
173 #include <asm/div64.h> /* do_div */
174
175 #define VERSION "2.74"
176 #define IP_NAME_SZ 32
177 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
178 #define MPLS_STACK_BOTTOM htonl(0x00000100)
179
180 #define func_enter() pr_debug("entering %s\n", __func__);
181
182 /* Device flag bits */
183 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
184 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
185 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
186 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
187 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
188 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
189 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
190 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
191 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
192 #define F_VID_RND (1<<9) /* Random VLAN ID */
193 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
194 #define F_FLOW_SEQ (1<<11) /* Sequential flows */
195 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */
196 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
197 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
198 #define F_NODE (1<<15) /* Node memory alloc*/
199
200 /* Thread control flag bits */
201 #define T_STOP (1<<0) /* Stop run */
202 #define T_RUN (1<<1) /* Start run */
203 #define T_REMDEVALL (1<<2) /* Remove all devs */
204 #define T_REMDEV (1<<3) /* Remove one dev */
205
206 /* If lock -- can be removed after some work */
207 #define if_lock(t) spin_lock(&(t->if_lock));
208 #define if_unlock(t) spin_unlock(&(t->if_lock));
209
210 /* Used to help with determining the pkts on receive */
211 #define PKTGEN_MAGIC 0xbe9be955
212 #define PG_PROC_DIR "pktgen"
213 #define PGCTRL "pgctrl"
214 static struct proc_dir_entry *pg_proc_dir;
215
216 #define MAX_CFLOWS 65536
217
218 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
219 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
220
221 struct flow_state {
222 __be32 cur_daddr;
223 int count;
224 #ifdef CONFIG_XFRM
225 struct xfrm_state *x;
226 #endif
227 __u32 flags;
228 };
229
230 /* flow flag bits */
231 #define F_INIT (1<<0) /* flow has been initialized */
232
233 struct pktgen_dev {
234 /*
235 * Try to keep frequent/infrequent used vars. separated.
236 */
237 struct proc_dir_entry *entry; /* proc file */
238 struct pktgen_thread *pg_thread;/* the owner */
239 struct list_head list; /* chaining in the thread's run-queue */
240
241 int running; /* if false, the test will stop */
242
243 /* If min != max, then we will either do a linear iteration, or
244 * we will do a random selection from within the range.
245 */
246 __u32 flags;
247 int removal_mark; /* non-zero => the device is marked for
248 * removal by worker thread */
249
250 int min_pkt_size; /* = ETH_ZLEN; */
251 int max_pkt_size; /* = ETH_ZLEN; */
252 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
253 int nfrags;
254 u64 delay; /* nano-seconds */
255
256 __u64 count; /* Default No packets to send */
257 __u64 sofar; /* How many pkts we've sent so far */
258 __u64 tx_bytes; /* How many bytes we've transmitted */
259 __u64 errors; /* Errors when trying to transmit, */
260
261 /* runtime counters relating to clone_skb */
262
263 __u64 allocated_skbs;
264 __u32 clone_count;
265 int last_ok; /* Was last skb sent?
266 * Or a failed transmit of some sort?
267 * This will keep sequence numbers in order
268 */
269 ktime_t next_tx;
270 ktime_t started_at;
271 ktime_t stopped_at;
272 u64 idle_acc; /* nano-seconds */
273
274 __u32 seq_num;
275
276 int clone_skb; /*
277 * Use multiple SKBs during packet gen.
278 * If this number is greater than 1, then
279 * that many copies of the same packet will be
280 * sent before a new packet is allocated.
281 * If you want to send 1024 identical packets
282 * before creating a new packet,
283 * set clone_skb to 1024.
284 */
285
286 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
287 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
288 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
289 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
290
291 struct in6_addr in6_saddr;
292 struct in6_addr in6_daddr;
293 struct in6_addr cur_in6_daddr;
294 struct in6_addr cur_in6_saddr;
295 /* For ranges */
296 struct in6_addr min_in6_daddr;
297 struct in6_addr max_in6_daddr;
298 struct in6_addr min_in6_saddr;
299 struct in6_addr max_in6_saddr;
300
301 /* If we're doing ranges, random or incremental, then this
302 * defines the min/max for those ranges.
303 */
304 __be32 saddr_min; /* inclusive, source IP address */
305 __be32 saddr_max; /* exclusive, source IP address */
306 __be32 daddr_min; /* inclusive, dest IP address */
307 __be32 daddr_max; /* exclusive, dest IP address */
308
309 __u16 udp_src_min; /* inclusive, source UDP port */
310 __u16 udp_src_max; /* exclusive, source UDP port */
311 __u16 udp_dst_min; /* inclusive, dest UDP port */
312 __u16 udp_dst_max; /* exclusive, dest UDP port */
313
314 /* DSCP + ECN */
315 __u8 tos; /* six MSB of (former) IPv4 TOS
316 are for dscp codepoint */
317 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
318 (see RFC 3260, sec. 4) */
319
320 /* MPLS */
321 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
322 __be32 labels[MAX_MPLS_LABELS];
323
324 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
325 __u8 vlan_p;
326 __u8 vlan_cfi;
327 __u16 vlan_id; /* 0xffff means no vlan tag */
328
329 __u8 svlan_p;
330 __u8 svlan_cfi;
331 __u16 svlan_id; /* 0xffff means no svlan tag */
332
333 __u32 src_mac_count; /* How many MACs to iterate through */
334 __u32 dst_mac_count; /* How many MACs to iterate through */
335
336 unsigned char dst_mac[ETH_ALEN];
337 unsigned char src_mac[ETH_ALEN];
338
339 __u32 cur_dst_mac_offset;
340 __u32 cur_src_mac_offset;
341 __be32 cur_saddr;
342 __be32 cur_daddr;
343 __u16 ip_id;
344 __u16 cur_udp_dst;
345 __u16 cur_udp_src;
346 __u16 cur_queue_map;
347 __u32 cur_pkt_size;
348 __u32 last_pkt_size;
349
350 __u8 hh[14];
351 /* = {
352 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
353
354 We fill in SRC address later
355 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
356 0x08, 0x00
357 };
358 */
359 __u16 pad; /* pad out the hh struct to an even 16 bytes */
360
361 struct sk_buff *skb; /* skb we are to transmit next, used for when we
362 * are transmitting the same one multiple times
363 */
364 struct net_device *odev; /* The out-going device.
365 * Note that the device should have it's
366 * pg_info pointer pointing back to this
367 * device.
368 * Set when the user specifies the out-going
369 * device name (not when the inject is
370 * started as it used to do.)
371 */
372 char odevname[32];
373 struct flow_state *flows;
374 unsigned cflows; /* Concurrent flows (config) */
375 unsigned lflow; /* Flow length (config) */
376 unsigned nflows; /* accumulated flows (stats) */
377 unsigned curfl; /* current sequenced flow (state)*/
378
379 u16 queue_map_min;
380 u16 queue_map_max;
381 __u32 skb_priority; /* skb priority field */
382 int node; /* Memory node */
383
384 #ifdef CONFIG_XFRM
385 __u8 ipsmode; /* IPSEC mode (config) */
386 __u8 ipsproto; /* IPSEC type (config) */
387 #endif
388 char result[512];
389 };
390
391 struct pktgen_hdr {
392 __be32 pgh_magic;
393 __be32 seq_num;
394 __be32 tv_sec;
395 __be32 tv_usec;
396 };
397
398 static bool pktgen_exiting __read_mostly;
399
400 struct pktgen_thread {
401 spinlock_t if_lock; /* for list of devices */
402 struct list_head if_list; /* All device here */
403 struct list_head th_list;
404 struct task_struct *tsk;
405 char result[512];
406
407 /* Field for thread to receive "posted" events terminate,
408 stop ifs etc. */
409
410 u32 control;
411 int cpu;
412
413 wait_queue_head_t queue;
414 struct completion start_done;
415 };
416
417 #define REMOVE 1
418 #define FIND 0
419
420 static inline ktime_t ktime_now(void)
421 {
422 struct timespec ts;
423 ktime_get_ts(&ts);
424
425 return timespec_to_ktime(ts);
426 }
427
428 /* This works even if 32 bit because of careful byte order choice */
429 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2)
430 {
431 return cmp1.tv64 < cmp2.tv64;
432 }
433
434 static const char version[] =
435 "Packet Generator for packet performance testing. "
436 "Version: " VERSION "\n";
437
438 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
439 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
440 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
441 const char *ifname, bool exact);
442 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
443 static void pktgen_run_all_threads(void);
444 static void pktgen_reset_all_threads(void);
445 static void pktgen_stop_all_threads_ifs(void);
446
447 static void pktgen_stop(struct pktgen_thread *t);
448 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
449
450 static unsigned int scan_ip6(const char *s, char ip[16]);
451 static unsigned int fmt_ip6(char *s, const char ip[16]);
452
453 /* Module parameters, defaults. */
454 static int pg_count_d __read_mostly = 1000;
455 static int pg_delay_d __read_mostly;
456 static int pg_clone_skb_d __read_mostly;
457 static int debug __read_mostly;
458
459 static DEFINE_MUTEX(pktgen_thread_lock);
460 static LIST_HEAD(pktgen_threads);
461
462 static struct notifier_block pktgen_notifier_block = {
463 .notifier_call = pktgen_device_event,
464 };
465
466 /*
467 * /proc handling functions
468 *
469 */
470
471 static int pgctrl_show(struct seq_file *seq, void *v)
472 {
473 seq_puts(seq, version);
474 return 0;
475 }
476
477 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
478 size_t count, loff_t *ppos)
479 {
480 int err = 0;
481 char data[128];
482
483 if (!capable(CAP_NET_ADMIN)) {
484 err = -EPERM;
485 goto out;
486 }
487
488 if (count > sizeof(data))
489 count = sizeof(data);
490
491 if (copy_from_user(data, buf, count)) {
492 err = -EFAULT;
493 goto out;
494 }
495 data[count - 1] = 0; /* Make string */
496
497 if (!strcmp(data, "stop"))
498 pktgen_stop_all_threads_ifs();
499
500 else if (!strcmp(data, "start"))
501 pktgen_run_all_threads();
502
503 else if (!strcmp(data, "reset"))
504 pktgen_reset_all_threads();
505
506 else
507 pr_warning("Unknown command: %s\n", data);
508
509 err = count;
510
511 out:
512 return err;
513 }
514
515 static int pgctrl_open(struct inode *inode, struct file *file)
516 {
517 return single_open(file, pgctrl_show, PDE(inode)->data);
518 }
519
520 static const struct file_operations pktgen_fops = {
521 .owner = THIS_MODULE,
522 .open = pgctrl_open,
523 .read = seq_read,
524 .llseek = seq_lseek,
525 .write = pgctrl_write,
526 .release = single_release,
527 };
528
529 static int pktgen_if_show(struct seq_file *seq, void *v)
530 {
531 const struct pktgen_dev *pkt_dev = seq->private;
532 ktime_t stopped;
533 u64 idle;
534
535 seq_printf(seq,
536 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
537 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
538 pkt_dev->max_pkt_size);
539
540 seq_printf(seq,
541 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
542 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
543 pkt_dev->clone_skb, pkt_dev->odevname);
544
545 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
546 pkt_dev->lflow);
547
548 seq_printf(seq,
549 " queue_map_min: %u queue_map_max: %u\n",
550 pkt_dev->queue_map_min,
551 pkt_dev->queue_map_max);
552
553 if (pkt_dev->skb_priority)
554 seq_printf(seq, " skb_priority: %u\n",
555 pkt_dev->skb_priority);
556
557 if (pkt_dev->flags & F_IPV6) {
558 char b1[128], b2[128], b3[128];
559 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
560 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
561 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
562 seq_printf(seq,
563 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
564 b2, b3);
565
566 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
567 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
568 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
569 seq_printf(seq,
570 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
571 b2, b3);
572
573 } else {
574 seq_printf(seq,
575 " dst_min: %s dst_max: %s\n",
576 pkt_dev->dst_min, pkt_dev->dst_max);
577 seq_printf(seq,
578 " src_min: %s src_max: %s\n",
579 pkt_dev->src_min, pkt_dev->src_max);
580 }
581
582 seq_puts(seq, " src_mac: ");
583
584 seq_printf(seq, "%pM ",
585 is_zero_ether_addr(pkt_dev->src_mac) ?
586 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
587
588 seq_printf(seq, "dst_mac: ");
589 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
590
591 seq_printf(seq,
592 " udp_src_min: %d udp_src_max: %d"
593 " udp_dst_min: %d udp_dst_max: %d\n",
594 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
595 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
596
597 seq_printf(seq,
598 " src_mac_count: %d dst_mac_count: %d\n",
599 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
600
601 if (pkt_dev->nr_labels) {
602 unsigned i;
603 seq_printf(seq, " mpls: ");
604 for (i = 0; i < pkt_dev->nr_labels; i++)
605 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
606 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
607 }
608
609 if (pkt_dev->vlan_id != 0xffff)
610 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
611 pkt_dev->vlan_id, pkt_dev->vlan_p,
612 pkt_dev->vlan_cfi);
613
614 if (pkt_dev->svlan_id != 0xffff)
615 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
616 pkt_dev->svlan_id, pkt_dev->svlan_p,
617 pkt_dev->svlan_cfi);
618
619 if (pkt_dev->tos)
620 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
621
622 if (pkt_dev->traffic_class)
623 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
624
625 if (pkt_dev->node >= 0)
626 seq_printf(seq, " node: %d\n", pkt_dev->node);
627
628 seq_printf(seq, " Flags: ");
629
630 if (pkt_dev->flags & F_IPV6)
631 seq_printf(seq, "IPV6 ");
632
633 if (pkt_dev->flags & F_IPSRC_RND)
634 seq_printf(seq, "IPSRC_RND ");
635
636 if (pkt_dev->flags & F_IPDST_RND)
637 seq_printf(seq, "IPDST_RND ");
638
639 if (pkt_dev->flags & F_TXSIZE_RND)
640 seq_printf(seq, "TXSIZE_RND ");
641
642 if (pkt_dev->flags & F_UDPSRC_RND)
643 seq_printf(seq, "UDPSRC_RND ");
644
645 if (pkt_dev->flags & F_UDPDST_RND)
646 seq_printf(seq, "UDPDST_RND ");
647
648 if (pkt_dev->flags & F_MPLS_RND)
649 seq_printf(seq, "MPLS_RND ");
650
651 if (pkt_dev->flags & F_QUEUE_MAP_RND)
652 seq_printf(seq, "QUEUE_MAP_RND ");
653
654 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
655 seq_printf(seq, "QUEUE_MAP_CPU ");
656
657 if (pkt_dev->cflows) {
658 if (pkt_dev->flags & F_FLOW_SEQ)
659 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
660 else
661 seq_printf(seq, "FLOW_RND ");
662 }
663
664 #ifdef CONFIG_XFRM
665 if (pkt_dev->flags & F_IPSEC_ON)
666 seq_printf(seq, "IPSEC ");
667 #endif
668
669 if (pkt_dev->flags & F_MACSRC_RND)
670 seq_printf(seq, "MACSRC_RND ");
671
672 if (pkt_dev->flags & F_MACDST_RND)
673 seq_printf(seq, "MACDST_RND ");
674
675 if (pkt_dev->flags & F_VID_RND)
676 seq_printf(seq, "VID_RND ");
677
678 if (pkt_dev->flags & F_SVID_RND)
679 seq_printf(seq, "SVID_RND ");
680
681 if (pkt_dev->flags & F_NODE)
682 seq_printf(seq, "NODE_ALLOC ");
683
684 seq_puts(seq, "\n");
685
686 /* not really stopped, more like last-running-at */
687 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at;
688 idle = pkt_dev->idle_acc;
689 do_div(idle, NSEC_PER_USEC);
690
691 seq_printf(seq,
692 "Current:\n pkts-sofar: %llu errors: %llu\n",
693 (unsigned long long)pkt_dev->sofar,
694 (unsigned long long)pkt_dev->errors);
695
696 seq_printf(seq,
697 " started: %lluus stopped: %lluus idle: %lluus\n",
698 (unsigned long long) ktime_to_us(pkt_dev->started_at),
699 (unsigned long long) ktime_to_us(stopped),
700 (unsigned long long) idle);
701
702 seq_printf(seq,
703 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
704 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
705 pkt_dev->cur_src_mac_offset);
706
707 if (pkt_dev->flags & F_IPV6) {
708 char b1[128], b2[128];
709 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
710 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
711 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
712 } else
713 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
714 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
715
716 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
717 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
718
719 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
720
721 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
722
723 if (pkt_dev->result[0])
724 seq_printf(seq, "Result: %s\n", pkt_dev->result);
725 else
726 seq_printf(seq, "Result: Idle\n");
727
728 return 0;
729 }
730
731
732 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
733 __u32 *num)
734 {
735 int i = 0;
736 *num = 0;
737
738 for (; i < maxlen; i++) {
739 int value;
740 char c;
741 *num <<= 4;
742 if (get_user(c, &user_buffer[i]))
743 return -EFAULT;
744 value = hex_to_bin(c);
745 if (value >= 0)
746 *num |= value;
747 else
748 break;
749 }
750 return i;
751 }
752
753 static int count_trail_chars(const char __user * user_buffer,
754 unsigned int maxlen)
755 {
756 int i;
757
758 for (i = 0; i < maxlen; i++) {
759 char c;
760 if (get_user(c, &user_buffer[i]))
761 return -EFAULT;
762 switch (c) {
763 case '\"':
764 case '\n':
765 case '\r':
766 case '\t':
767 case ' ':
768 case '=':
769 break;
770 default:
771 goto done;
772 }
773 }
774 done:
775 return i;
776 }
777
778 static unsigned long num_arg(const char __user * user_buffer,
779 unsigned long maxlen, unsigned long *num)
780 {
781 int i;
782 *num = 0;
783
784 for (i = 0; i < maxlen; i++) {
785 char c;
786 if (get_user(c, &user_buffer[i]))
787 return -EFAULT;
788 if ((c >= '0') && (c <= '9')) {
789 *num *= 10;
790 *num += c - '0';
791 } else
792 break;
793 }
794 return i;
795 }
796
797 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
798 {
799 int i;
800
801 for (i = 0; i < maxlen; i++) {
802 char c;
803 if (get_user(c, &user_buffer[i]))
804 return -EFAULT;
805 switch (c) {
806 case '\"':
807 case '\n':
808 case '\r':
809 case '\t':
810 case ' ':
811 goto done_str;
812 break;
813 default:
814 break;
815 }
816 }
817 done_str:
818 return i;
819 }
820
821 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
822 {
823 unsigned n = 0;
824 char c;
825 ssize_t i = 0;
826 int len;
827
828 pkt_dev->nr_labels = 0;
829 do {
830 __u32 tmp;
831 len = hex32_arg(&buffer[i], 8, &tmp);
832 if (len <= 0)
833 return len;
834 pkt_dev->labels[n] = htonl(tmp);
835 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
836 pkt_dev->flags |= F_MPLS_RND;
837 i += len;
838 if (get_user(c, &buffer[i]))
839 return -EFAULT;
840 i++;
841 n++;
842 if (n >= MAX_MPLS_LABELS)
843 return -E2BIG;
844 } while (c == ',');
845
846 pkt_dev->nr_labels = n;
847 return i;
848 }
849
850 static ssize_t pktgen_if_write(struct file *file,
851 const char __user * user_buffer, size_t count,
852 loff_t * offset)
853 {
854 struct seq_file *seq = file->private_data;
855 struct pktgen_dev *pkt_dev = seq->private;
856 int i, max, len;
857 char name[16], valstr[32];
858 unsigned long value = 0;
859 char *pg_result = NULL;
860 int tmp = 0;
861 char buf[128];
862
863 pg_result = &(pkt_dev->result[0]);
864
865 if (count < 1) {
866 pr_warning("wrong command format\n");
867 return -EINVAL;
868 }
869
870 max = count;
871 tmp = count_trail_chars(user_buffer, max);
872 if (tmp < 0) {
873 pr_warning("illegal format\n");
874 return tmp;
875 }
876 i = tmp;
877
878 /* Read variable name */
879
880 len = strn_len(&user_buffer[i], sizeof(name) - 1);
881 if (len < 0)
882 return len;
883
884 memset(name, 0, sizeof(name));
885 if (copy_from_user(name, &user_buffer[i], len))
886 return -EFAULT;
887 i += len;
888
889 max = count - i;
890 len = count_trail_chars(&user_buffer[i], max);
891 if (len < 0)
892 return len;
893
894 i += len;
895
896 if (debug) {
897 size_t copy = min_t(size_t, count, 1023);
898 char tb[copy + 1];
899 if (copy_from_user(tb, user_buffer, copy))
900 return -EFAULT;
901 tb[copy] = 0;
902 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name,
903 (unsigned long)count, tb);
904 }
905
906 if (!strcmp(name, "min_pkt_size")) {
907 len = num_arg(&user_buffer[i], 10, &value);
908 if (len < 0)
909 return len;
910
911 i += len;
912 if (value < 14 + 20 + 8)
913 value = 14 + 20 + 8;
914 if (value != pkt_dev->min_pkt_size) {
915 pkt_dev->min_pkt_size = value;
916 pkt_dev->cur_pkt_size = value;
917 }
918 sprintf(pg_result, "OK: min_pkt_size=%u",
919 pkt_dev->min_pkt_size);
920 return count;
921 }
922
923 if (!strcmp(name, "max_pkt_size")) {
924 len = num_arg(&user_buffer[i], 10, &value);
925 if (len < 0)
926 return len;
927
928 i += len;
929 if (value < 14 + 20 + 8)
930 value = 14 + 20 + 8;
931 if (value != pkt_dev->max_pkt_size) {
932 pkt_dev->max_pkt_size = value;
933 pkt_dev->cur_pkt_size = value;
934 }
935 sprintf(pg_result, "OK: max_pkt_size=%u",
936 pkt_dev->max_pkt_size);
937 return count;
938 }
939
940 /* Shortcut for min = max */
941
942 if (!strcmp(name, "pkt_size")) {
943 len = num_arg(&user_buffer[i], 10, &value);
944 if (len < 0)
945 return len;
946
947 i += len;
948 if (value < 14 + 20 + 8)
949 value = 14 + 20 + 8;
950 if (value != pkt_dev->min_pkt_size) {
951 pkt_dev->min_pkt_size = value;
952 pkt_dev->max_pkt_size = value;
953 pkt_dev->cur_pkt_size = value;
954 }
955 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
956 return count;
957 }
958
959 if (!strcmp(name, "debug")) {
960 len = num_arg(&user_buffer[i], 10, &value);
961 if (len < 0)
962 return len;
963
964 i += len;
965 debug = value;
966 sprintf(pg_result, "OK: debug=%u", debug);
967 return count;
968 }
969
970 if (!strcmp(name, "frags")) {
971 len = num_arg(&user_buffer[i], 10, &value);
972 if (len < 0)
973 return len;
974
975 i += len;
976 pkt_dev->nfrags = value;
977 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
978 return count;
979 }
980 if (!strcmp(name, "delay")) {
981 len = num_arg(&user_buffer[i], 10, &value);
982 if (len < 0)
983 return len;
984
985 i += len;
986 if (value == 0x7FFFFFFF)
987 pkt_dev->delay = ULLONG_MAX;
988 else
989 pkt_dev->delay = (u64)value;
990
991 sprintf(pg_result, "OK: delay=%llu",
992 (unsigned long long) pkt_dev->delay);
993 return count;
994 }
995 if (!strcmp(name, "rate")) {
996 len = num_arg(&user_buffer[i], 10, &value);
997 if (len < 0)
998 return len;
999
1000 i += len;
1001 if (!value)
1002 return len;
1003 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
1004 if (debug)
1005 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1006
1007 sprintf(pg_result, "OK: rate=%lu", value);
1008 return count;
1009 }
1010 if (!strcmp(name, "ratep")) {
1011 len = num_arg(&user_buffer[i], 10, &value);
1012 if (len < 0)
1013 return len;
1014
1015 i += len;
1016 if (!value)
1017 return len;
1018 pkt_dev->delay = NSEC_PER_SEC/value;
1019 if (debug)
1020 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1021
1022 sprintf(pg_result, "OK: rate=%lu", value);
1023 return count;
1024 }
1025 if (!strcmp(name, "udp_src_min")) {
1026 len = num_arg(&user_buffer[i], 10, &value);
1027 if (len < 0)
1028 return len;
1029
1030 i += len;
1031 if (value != pkt_dev->udp_src_min) {
1032 pkt_dev->udp_src_min = value;
1033 pkt_dev->cur_udp_src = value;
1034 }
1035 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1036 return count;
1037 }
1038 if (!strcmp(name, "udp_dst_min")) {
1039 len = num_arg(&user_buffer[i], 10, &value);
1040 if (len < 0)
1041 return len;
1042
1043 i += len;
1044 if (value != pkt_dev->udp_dst_min) {
1045 pkt_dev->udp_dst_min = value;
1046 pkt_dev->cur_udp_dst = value;
1047 }
1048 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1049 return count;
1050 }
1051 if (!strcmp(name, "udp_src_max")) {
1052 len = num_arg(&user_buffer[i], 10, &value);
1053 if (len < 0)
1054 return len;
1055
1056 i += len;
1057 if (value != pkt_dev->udp_src_max) {
1058 pkt_dev->udp_src_max = value;
1059 pkt_dev->cur_udp_src = value;
1060 }
1061 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1062 return count;
1063 }
1064 if (!strcmp(name, "udp_dst_max")) {
1065 len = num_arg(&user_buffer[i], 10, &value);
1066 if (len < 0)
1067 return len;
1068
1069 i += len;
1070 if (value != pkt_dev->udp_dst_max) {
1071 pkt_dev->udp_dst_max = value;
1072 pkt_dev->cur_udp_dst = value;
1073 }
1074 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1075 return count;
1076 }
1077 if (!strcmp(name, "clone_skb")) {
1078 len = num_arg(&user_buffer[i], 10, &value);
1079 if (len < 0)
1080 return len;
1081
1082 i += len;
1083 pkt_dev->clone_skb = value;
1084
1085 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1086 return count;
1087 }
1088 if (!strcmp(name, "count")) {
1089 len = num_arg(&user_buffer[i], 10, &value);
1090 if (len < 0)
1091 return len;
1092
1093 i += len;
1094 pkt_dev->count = value;
1095 sprintf(pg_result, "OK: count=%llu",
1096 (unsigned long long)pkt_dev->count);
1097 return count;
1098 }
1099 if (!strcmp(name, "src_mac_count")) {
1100 len = num_arg(&user_buffer[i], 10, &value);
1101 if (len < 0)
1102 return len;
1103
1104 i += len;
1105 if (pkt_dev->src_mac_count != value) {
1106 pkt_dev->src_mac_count = value;
1107 pkt_dev->cur_src_mac_offset = 0;
1108 }
1109 sprintf(pg_result, "OK: src_mac_count=%d",
1110 pkt_dev->src_mac_count);
1111 return count;
1112 }
1113 if (!strcmp(name, "dst_mac_count")) {
1114 len = num_arg(&user_buffer[i], 10, &value);
1115 if (len < 0)
1116 return len;
1117
1118 i += len;
1119 if (pkt_dev->dst_mac_count != value) {
1120 pkt_dev->dst_mac_count = value;
1121 pkt_dev->cur_dst_mac_offset = 0;
1122 }
1123 sprintf(pg_result, "OK: dst_mac_count=%d",
1124 pkt_dev->dst_mac_count);
1125 return count;
1126 }
1127 if (!strcmp(name, "node")) {
1128 len = num_arg(&user_buffer[i], 10, &value);
1129 if (len < 0)
1130 return len;
1131
1132 i += len;
1133
1134 if (node_possible(value)) {
1135 pkt_dev->node = value;
1136 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1137 }
1138 else
1139 sprintf(pg_result, "ERROR: node not possible");
1140 return count;
1141 }
1142 if (!strcmp(name, "flag")) {
1143 char f[32];
1144 memset(f, 0, 32);
1145 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1146 if (len < 0)
1147 return len;
1148
1149 if (copy_from_user(f, &user_buffer[i], len))
1150 return -EFAULT;
1151 i += len;
1152 if (strcmp(f, "IPSRC_RND") == 0)
1153 pkt_dev->flags |= F_IPSRC_RND;
1154
1155 else if (strcmp(f, "!IPSRC_RND") == 0)
1156 pkt_dev->flags &= ~F_IPSRC_RND;
1157
1158 else if (strcmp(f, "TXSIZE_RND") == 0)
1159 pkt_dev->flags |= F_TXSIZE_RND;
1160
1161 else if (strcmp(f, "!TXSIZE_RND") == 0)
1162 pkt_dev->flags &= ~F_TXSIZE_RND;
1163
1164 else if (strcmp(f, "IPDST_RND") == 0)
1165 pkt_dev->flags |= F_IPDST_RND;
1166
1167 else if (strcmp(f, "!IPDST_RND") == 0)
1168 pkt_dev->flags &= ~F_IPDST_RND;
1169
1170 else if (strcmp(f, "UDPSRC_RND") == 0)
1171 pkt_dev->flags |= F_UDPSRC_RND;
1172
1173 else if (strcmp(f, "!UDPSRC_RND") == 0)
1174 pkt_dev->flags &= ~F_UDPSRC_RND;
1175
1176 else if (strcmp(f, "UDPDST_RND") == 0)
1177 pkt_dev->flags |= F_UDPDST_RND;
1178
1179 else if (strcmp(f, "!UDPDST_RND") == 0)
1180 pkt_dev->flags &= ~F_UDPDST_RND;
1181
1182 else if (strcmp(f, "MACSRC_RND") == 0)
1183 pkt_dev->flags |= F_MACSRC_RND;
1184
1185 else if (strcmp(f, "!MACSRC_RND") == 0)
1186 pkt_dev->flags &= ~F_MACSRC_RND;
1187
1188 else if (strcmp(f, "MACDST_RND") == 0)
1189 pkt_dev->flags |= F_MACDST_RND;
1190
1191 else if (strcmp(f, "!MACDST_RND") == 0)
1192 pkt_dev->flags &= ~F_MACDST_RND;
1193
1194 else if (strcmp(f, "MPLS_RND") == 0)
1195 pkt_dev->flags |= F_MPLS_RND;
1196
1197 else if (strcmp(f, "!MPLS_RND") == 0)
1198 pkt_dev->flags &= ~F_MPLS_RND;
1199
1200 else if (strcmp(f, "VID_RND") == 0)
1201 pkt_dev->flags |= F_VID_RND;
1202
1203 else if (strcmp(f, "!VID_RND") == 0)
1204 pkt_dev->flags &= ~F_VID_RND;
1205
1206 else if (strcmp(f, "SVID_RND") == 0)
1207 pkt_dev->flags |= F_SVID_RND;
1208
1209 else if (strcmp(f, "!SVID_RND") == 0)
1210 pkt_dev->flags &= ~F_SVID_RND;
1211
1212 else if (strcmp(f, "FLOW_SEQ") == 0)
1213 pkt_dev->flags |= F_FLOW_SEQ;
1214
1215 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1216 pkt_dev->flags |= F_QUEUE_MAP_RND;
1217
1218 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1219 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1220
1221 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1222 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1223
1224 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1225 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1226 #ifdef CONFIG_XFRM
1227 else if (strcmp(f, "IPSEC") == 0)
1228 pkt_dev->flags |= F_IPSEC_ON;
1229 #endif
1230
1231 else if (strcmp(f, "!IPV6") == 0)
1232 pkt_dev->flags &= ~F_IPV6;
1233
1234 else if (strcmp(f, "NODE_ALLOC") == 0)
1235 pkt_dev->flags |= F_NODE;
1236
1237 else if (strcmp(f, "!NODE_ALLOC") == 0)
1238 pkt_dev->flags &= ~F_NODE;
1239
1240 else {
1241 sprintf(pg_result,
1242 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1243 f,
1244 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1245 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n");
1246 return count;
1247 }
1248 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1249 return count;
1250 }
1251 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1252 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1253 if (len < 0)
1254 return len;
1255
1256 if (copy_from_user(buf, &user_buffer[i], len))
1257 return -EFAULT;
1258 buf[len] = 0;
1259 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1260 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1261 strncpy(pkt_dev->dst_min, buf, len);
1262 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1263 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1264 }
1265 if (debug)
1266 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1267 pkt_dev->dst_min);
1268 i += len;
1269 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1270 return count;
1271 }
1272 if (!strcmp(name, "dst_max")) {
1273 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1274 if (len < 0)
1275 return len;
1276
1277
1278 if (copy_from_user(buf, &user_buffer[i], len))
1279 return -EFAULT;
1280
1281 buf[len] = 0;
1282 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1283 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1284 strncpy(pkt_dev->dst_max, buf, len);
1285 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1286 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1287 }
1288 if (debug)
1289 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1290 pkt_dev->dst_max);
1291 i += len;
1292 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1293 return count;
1294 }
1295 if (!strcmp(name, "dst6")) {
1296 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1297 if (len < 0)
1298 return len;
1299
1300 pkt_dev->flags |= F_IPV6;
1301
1302 if (copy_from_user(buf, &user_buffer[i], len))
1303 return -EFAULT;
1304 buf[len] = 0;
1305
1306 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1307 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1308
1309 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1310
1311 if (debug)
1312 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1313
1314 i += len;
1315 sprintf(pg_result, "OK: dst6=%s", buf);
1316 return count;
1317 }
1318 if (!strcmp(name, "dst6_min")) {
1319 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1320 if (len < 0)
1321 return len;
1322
1323 pkt_dev->flags |= F_IPV6;
1324
1325 if (copy_from_user(buf, &user_buffer[i], len))
1326 return -EFAULT;
1327 buf[len] = 0;
1328
1329 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1330 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1331
1332 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1333 &pkt_dev->min_in6_daddr);
1334 if (debug)
1335 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1336
1337 i += len;
1338 sprintf(pg_result, "OK: dst6_min=%s", buf);
1339 return count;
1340 }
1341 if (!strcmp(name, "dst6_max")) {
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 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1353 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1354
1355 if (debug)
1356 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1357
1358 i += len;
1359 sprintf(pg_result, "OK: dst6_max=%s", buf);
1360 return count;
1361 }
1362 if (!strcmp(name, "src6")) {
1363 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1364 if (len < 0)
1365 return len;
1366
1367 pkt_dev->flags |= F_IPV6;
1368
1369 if (copy_from_user(buf, &user_buffer[i], len))
1370 return -EFAULT;
1371 buf[len] = 0;
1372
1373 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1374 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1375
1376 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1377
1378 if (debug)
1379 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1380
1381 i += len;
1382 sprintf(pg_result, "OK: src6=%s", buf);
1383 return count;
1384 }
1385 if (!strcmp(name, "src_min")) {
1386 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1387 if (len < 0)
1388 return len;
1389
1390 if (copy_from_user(buf, &user_buffer[i], len))
1391 return -EFAULT;
1392 buf[len] = 0;
1393 if (strcmp(buf, pkt_dev->src_min) != 0) {
1394 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1395 strncpy(pkt_dev->src_min, buf, len);
1396 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1397 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1398 }
1399 if (debug)
1400 printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1401 pkt_dev->src_min);
1402 i += len;
1403 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1404 return count;
1405 }
1406 if (!strcmp(name, "src_max")) {
1407 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1408 if (len < 0)
1409 return len;
1410
1411 if (copy_from_user(buf, &user_buffer[i], len))
1412 return -EFAULT;
1413 buf[len] = 0;
1414 if (strcmp(buf, pkt_dev->src_max) != 0) {
1415 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1416 strncpy(pkt_dev->src_max, buf, len);
1417 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1418 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1419 }
1420 if (debug)
1421 printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1422 pkt_dev->src_max);
1423 i += len;
1424 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1425 return count;
1426 }
1427 if (!strcmp(name, "dst_mac")) {
1428 char *v = valstr;
1429 unsigned char old_dmac[ETH_ALEN];
1430 unsigned char *m = pkt_dev->dst_mac;
1431 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1432
1433 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1434 if (len < 0)
1435 return len;
1436
1437 memset(valstr, 0, sizeof(valstr));
1438 if (copy_from_user(valstr, &user_buffer[i], len))
1439 return -EFAULT;
1440 i += len;
1441
1442 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1443 int value;
1444
1445 value = hex_to_bin(*v);
1446 if (value >= 0)
1447 *m = *m * 16 + value;
1448
1449 if (*v == ':') {
1450 m++;
1451 *m = 0;
1452 }
1453 }
1454
1455 /* Set up Dest MAC */
1456 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1457 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1458
1459 sprintf(pg_result, "OK: dstmac");
1460 return count;
1461 }
1462 if (!strcmp(name, "src_mac")) {
1463 char *v = valstr;
1464 unsigned char old_smac[ETH_ALEN];
1465 unsigned char *m = pkt_dev->src_mac;
1466
1467 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN);
1468
1469 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1470 if (len < 0)
1471 return len;
1472
1473 memset(valstr, 0, sizeof(valstr));
1474 if (copy_from_user(valstr, &user_buffer[i], len))
1475 return -EFAULT;
1476 i += len;
1477
1478 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1479 int value;
1480
1481 value = hex_to_bin(*v);
1482 if (value >= 0)
1483 *m = *m * 16 + value;
1484
1485 if (*v == ':') {
1486 m++;
1487 *m = 0;
1488 }
1489 }
1490
1491 /* Set up Src MAC */
1492 if (compare_ether_addr(old_smac, pkt_dev->src_mac))
1493 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN);
1494
1495 sprintf(pg_result, "OK: srcmac");
1496 return count;
1497 }
1498
1499 if (!strcmp(name, "clear_counters")) {
1500 pktgen_clear_counters(pkt_dev);
1501 sprintf(pg_result, "OK: Clearing counters.\n");
1502 return count;
1503 }
1504
1505 if (!strcmp(name, "flows")) {
1506 len = num_arg(&user_buffer[i], 10, &value);
1507 if (len < 0)
1508 return len;
1509
1510 i += len;
1511 if (value > MAX_CFLOWS)
1512 value = MAX_CFLOWS;
1513
1514 pkt_dev->cflows = value;
1515 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1516 return count;
1517 }
1518
1519 if (!strcmp(name, "flowlen")) {
1520 len = num_arg(&user_buffer[i], 10, &value);
1521 if (len < 0)
1522 return len;
1523
1524 i += len;
1525 pkt_dev->lflow = value;
1526 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1527 return count;
1528 }
1529
1530 if (!strcmp(name, "queue_map_min")) {
1531 len = num_arg(&user_buffer[i], 5, &value);
1532 if (len < 0)
1533 return len;
1534
1535 i += len;
1536 pkt_dev->queue_map_min = value;
1537 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1538 return count;
1539 }
1540
1541 if (!strcmp(name, "queue_map_max")) {
1542 len = num_arg(&user_buffer[i], 5, &value);
1543 if (len < 0)
1544 return len;
1545
1546 i += len;
1547 pkt_dev->queue_map_max = value;
1548 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1549 return count;
1550 }
1551
1552 if (!strcmp(name, "mpls")) {
1553 unsigned n, cnt;
1554
1555 len = get_labels(&user_buffer[i], pkt_dev);
1556 if (len < 0)
1557 return len;
1558 i += len;
1559 cnt = sprintf(pg_result, "OK: mpls=");
1560 for (n = 0; n < pkt_dev->nr_labels; n++)
1561 cnt += sprintf(pg_result + cnt,
1562 "%08x%s", ntohl(pkt_dev->labels[n]),
1563 n == pkt_dev->nr_labels-1 ? "" : ",");
1564
1565 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1566 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1567 pkt_dev->svlan_id = 0xffff;
1568
1569 if (debug)
1570 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1571 }
1572 return count;
1573 }
1574
1575 if (!strcmp(name, "vlan_id")) {
1576 len = num_arg(&user_buffer[i], 4, &value);
1577 if (len < 0)
1578 return len;
1579
1580 i += len;
1581 if (value <= 4095) {
1582 pkt_dev->vlan_id = value; /* turn on VLAN */
1583
1584 if (debug)
1585 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1586
1587 if (debug && pkt_dev->nr_labels)
1588 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1589
1590 pkt_dev->nr_labels = 0; /* turn off MPLS */
1591 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1592 } else {
1593 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1594 pkt_dev->svlan_id = 0xffff;
1595
1596 if (debug)
1597 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1598 }
1599 return count;
1600 }
1601
1602 if (!strcmp(name, "vlan_p")) {
1603 len = num_arg(&user_buffer[i], 1, &value);
1604 if (len < 0)
1605 return len;
1606
1607 i += len;
1608 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1609 pkt_dev->vlan_p = value;
1610 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1611 } else {
1612 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1613 }
1614 return count;
1615 }
1616
1617 if (!strcmp(name, "vlan_cfi")) {
1618 len = num_arg(&user_buffer[i], 1, &value);
1619 if (len < 0)
1620 return len;
1621
1622 i += len;
1623 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1624 pkt_dev->vlan_cfi = value;
1625 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1626 } else {
1627 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1628 }
1629 return count;
1630 }
1631
1632 if (!strcmp(name, "svlan_id")) {
1633 len = num_arg(&user_buffer[i], 4, &value);
1634 if (len < 0)
1635 return len;
1636
1637 i += len;
1638 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1639 pkt_dev->svlan_id = value; /* turn on SVLAN */
1640
1641 if (debug)
1642 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1643
1644 if (debug && pkt_dev->nr_labels)
1645 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1646
1647 pkt_dev->nr_labels = 0; /* turn off MPLS */
1648 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1649 } else {
1650 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1651 pkt_dev->svlan_id = 0xffff;
1652
1653 if (debug)
1654 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1655 }
1656 return count;
1657 }
1658
1659 if (!strcmp(name, "svlan_p")) {
1660 len = num_arg(&user_buffer[i], 1, &value);
1661 if (len < 0)
1662 return len;
1663
1664 i += len;
1665 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1666 pkt_dev->svlan_p = value;
1667 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1668 } else {
1669 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1670 }
1671 return count;
1672 }
1673
1674 if (!strcmp(name, "svlan_cfi")) {
1675 len = num_arg(&user_buffer[i], 1, &value);
1676 if (len < 0)
1677 return len;
1678
1679 i += len;
1680 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1681 pkt_dev->svlan_cfi = value;
1682 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1683 } else {
1684 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1685 }
1686 return count;
1687 }
1688
1689 if (!strcmp(name, "tos")) {
1690 __u32 tmp_value = 0;
1691 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1692 if (len < 0)
1693 return len;
1694
1695 i += len;
1696 if (len == 2) {
1697 pkt_dev->tos = tmp_value;
1698 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1699 } else {
1700 sprintf(pg_result, "ERROR: tos must be 00-ff");
1701 }
1702 return count;
1703 }
1704
1705 if (!strcmp(name, "traffic_class")) {
1706 __u32 tmp_value = 0;
1707 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1708 if (len < 0)
1709 return len;
1710
1711 i += len;
1712 if (len == 2) {
1713 pkt_dev->traffic_class = tmp_value;
1714 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1715 } else {
1716 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1717 }
1718 return count;
1719 }
1720
1721 if (!strcmp(name, "skb_priority")) {
1722 len = num_arg(&user_buffer[i], 9, &value);
1723 if (len < 0)
1724 return len;
1725
1726 i += len;
1727 pkt_dev->skb_priority = value;
1728 sprintf(pg_result, "OK: skb_priority=%i",
1729 pkt_dev->skb_priority);
1730 return count;
1731 }
1732
1733 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1734 return -EINVAL;
1735 }
1736
1737 static int pktgen_if_open(struct inode *inode, struct file *file)
1738 {
1739 return single_open(file, pktgen_if_show, PDE(inode)->data);
1740 }
1741
1742 static const struct file_operations pktgen_if_fops = {
1743 .owner = THIS_MODULE,
1744 .open = pktgen_if_open,
1745 .read = seq_read,
1746 .llseek = seq_lseek,
1747 .write = pktgen_if_write,
1748 .release = single_release,
1749 };
1750
1751 static int pktgen_thread_show(struct seq_file *seq, void *v)
1752 {
1753 struct pktgen_thread *t = seq->private;
1754 const struct pktgen_dev *pkt_dev;
1755
1756 BUG_ON(!t);
1757
1758 seq_printf(seq, "Running: ");
1759
1760 if_lock(t);
1761 list_for_each_entry(pkt_dev, &t->if_list, list)
1762 if (pkt_dev->running)
1763 seq_printf(seq, "%s ", pkt_dev->odevname);
1764
1765 seq_printf(seq, "\nStopped: ");
1766
1767 list_for_each_entry(pkt_dev, &t->if_list, list)
1768 if (!pkt_dev->running)
1769 seq_printf(seq, "%s ", pkt_dev->odevname);
1770
1771 if (t->result[0])
1772 seq_printf(seq, "\nResult: %s\n", t->result);
1773 else
1774 seq_printf(seq, "\nResult: NA\n");
1775
1776 if_unlock(t);
1777
1778 return 0;
1779 }
1780
1781 static ssize_t pktgen_thread_write(struct file *file,
1782 const char __user * user_buffer,
1783 size_t count, loff_t * offset)
1784 {
1785 struct seq_file *seq = file->private_data;
1786 struct pktgen_thread *t = seq->private;
1787 int i, max, len, ret;
1788 char name[40];
1789 char *pg_result;
1790
1791 if (count < 1) {
1792 // sprintf(pg_result, "Wrong command format");
1793 return -EINVAL;
1794 }
1795
1796 max = count;
1797 len = count_trail_chars(user_buffer, max);
1798 if (len < 0)
1799 return len;
1800
1801 i = len;
1802
1803 /* Read variable name */
1804
1805 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1806 if (len < 0)
1807 return len;
1808
1809 memset(name, 0, sizeof(name));
1810 if (copy_from_user(name, &user_buffer[i], len))
1811 return -EFAULT;
1812 i += len;
1813
1814 max = count - i;
1815 len = count_trail_chars(&user_buffer[i], max);
1816 if (len < 0)
1817 return len;
1818
1819 i += len;
1820
1821 if (debug)
1822 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1823 name, (unsigned long)count);
1824
1825 if (!t) {
1826 pr_err("ERROR: No thread\n");
1827 ret = -EINVAL;
1828 goto out;
1829 }
1830
1831 pg_result = &(t->result[0]);
1832
1833 if (!strcmp(name, "add_device")) {
1834 char f[32];
1835 memset(f, 0, 32);
1836 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1837 if (len < 0) {
1838 ret = len;
1839 goto out;
1840 }
1841 if (copy_from_user(f, &user_buffer[i], len))
1842 return -EFAULT;
1843 i += len;
1844 mutex_lock(&pktgen_thread_lock);
1845 pktgen_add_device(t, f);
1846 mutex_unlock(&pktgen_thread_lock);
1847 ret = count;
1848 sprintf(pg_result, "OK: add_device=%s", f);
1849 goto out;
1850 }
1851
1852 if (!strcmp(name, "rem_device_all")) {
1853 mutex_lock(&pktgen_thread_lock);
1854 t->control |= T_REMDEVALL;
1855 mutex_unlock(&pktgen_thread_lock);
1856 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1857 ret = count;
1858 sprintf(pg_result, "OK: rem_device_all");
1859 goto out;
1860 }
1861
1862 if (!strcmp(name, "max_before_softirq")) {
1863 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1864 ret = count;
1865 goto out;
1866 }
1867
1868 ret = -EINVAL;
1869 out:
1870 return ret;
1871 }
1872
1873 static int pktgen_thread_open(struct inode *inode, struct file *file)
1874 {
1875 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1876 }
1877
1878 static const struct file_operations pktgen_thread_fops = {
1879 .owner = THIS_MODULE,
1880 .open = pktgen_thread_open,
1881 .read = seq_read,
1882 .llseek = seq_lseek,
1883 .write = pktgen_thread_write,
1884 .release = single_release,
1885 };
1886
1887 /* Think find or remove for NN */
1888 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1889 {
1890 struct pktgen_thread *t;
1891 struct pktgen_dev *pkt_dev = NULL;
1892 bool exact = (remove == FIND);
1893
1894 list_for_each_entry(t, &pktgen_threads, th_list) {
1895 pkt_dev = pktgen_find_dev(t, ifname, exact);
1896 if (pkt_dev) {
1897 if (remove) {
1898 if_lock(t);
1899 pkt_dev->removal_mark = 1;
1900 t->control |= T_REMDEV;
1901 if_unlock(t);
1902 }
1903 break;
1904 }
1905 }
1906 return pkt_dev;
1907 }
1908
1909 /*
1910 * mark a device for removal
1911 */
1912 static void pktgen_mark_device(const char *ifname)
1913 {
1914 struct pktgen_dev *pkt_dev = NULL;
1915 const int max_tries = 10, msec_per_try = 125;
1916 int i = 0;
1917
1918 mutex_lock(&pktgen_thread_lock);
1919 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1920
1921 while (1) {
1922
1923 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1924 if (pkt_dev == NULL)
1925 break; /* success */
1926
1927 mutex_unlock(&pktgen_thread_lock);
1928 pr_debug("%s: waiting for %s to disappear....\n",
1929 __func__, ifname);
1930 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1931 mutex_lock(&pktgen_thread_lock);
1932
1933 if (++i >= max_tries) {
1934 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1935 __func__, msec_per_try * i, ifname);
1936 break;
1937 }
1938
1939 }
1940
1941 mutex_unlock(&pktgen_thread_lock);
1942 }
1943
1944 static void pktgen_change_name(struct net_device *dev)
1945 {
1946 struct pktgen_thread *t;
1947
1948 list_for_each_entry(t, &pktgen_threads, th_list) {
1949 struct pktgen_dev *pkt_dev;
1950
1951 list_for_each_entry(pkt_dev, &t->if_list, list) {
1952 if (pkt_dev->odev != dev)
1953 continue;
1954
1955 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1956
1957 pkt_dev->entry = proc_create_data(dev->name, 0600,
1958 pg_proc_dir,
1959 &pktgen_if_fops,
1960 pkt_dev);
1961 if (!pkt_dev->entry)
1962 pr_err("can't move proc entry for '%s'\n",
1963 dev->name);
1964 break;
1965 }
1966 }
1967 }
1968
1969 static int pktgen_device_event(struct notifier_block *unused,
1970 unsigned long event, void *ptr)
1971 {
1972 struct net_device *dev = ptr;
1973
1974 if (!net_eq(dev_net(dev), &init_net))
1975 return NOTIFY_DONE;
1976
1977 /* It is OK that we do not hold the group lock right now,
1978 * as we run under the RTNL lock.
1979 */
1980
1981 switch (event) {
1982 case NETDEV_CHANGENAME:
1983 pktgen_change_name(dev);
1984 break;
1985
1986 case NETDEV_UNREGISTER:
1987 pktgen_mark_device(dev->name);
1988 break;
1989 }
1990
1991 return NOTIFY_DONE;
1992 }
1993
1994 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev,
1995 const char *ifname)
1996 {
1997 char b[IFNAMSIZ+5];
1998 int i;
1999
2000 for (i = 0; ifname[i] != '@'; i++) {
2001 if (i == IFNAMSIZ)
2002 break;
2003
2004 b[i] = ifname[i];
2005 }
2006 b[i] = 0;
2007
2008 return dev_get_by_name(&init_net, b);
2009 }
2010
2011
2012 /* Associate pktgen_dev with a device. */
2013
2014 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
2015 {
2016 struct net_device *odev;
2017 int err;
2018
2019 /* Clean old setups */
2020 if (pkt_dev->odev) {
2021 dev_put(pkt_dev->odev);
2022 pkt_dev->odev = NULL;
2023 }
2024
2025 odev = pktgen_dev_get_by_name(pkt_dev, ifname);
2026 if (!odev) {
2027 pr_err("no such netdevice: \"%s\"\n", ifname);
2028 return -ENODEV;
2029 }
2030
2031 if (odev->type != ARPHRD_ETHER) {
2032 pr_err("not an ethernet device: \"%s\"\n", ifname);
2033 err = -EINVAL;
2034 } else if (!netif_running(odev)) {
2035 pr_err("device is down: \"%s\"\n", ifname);
2036 err = -ENETDOWN;
2037 } else {
2038 pkt_dev->odev = odev;
2039 return 0;
2040 }
2041
2042 dev_put(odev);
2043 return err;
2044 }
2045
2046 /* Read pkt_dev from the interface and set up internal pktgen_dev
2047 * structure to have the right information to create/send packets
2048 */
2049 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2050 {
2051 int ntxq;
2052
2053 if (!pkt_dev->odev) {
2054 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2055 sprintf(pkt_dev->result,
2056 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2057 return;
2058 }
2059
2060 /* make sure that we don't pick a non-existing transmit queue */
2061 ntxq = pkt_dev->odev->real_num_tx_queues;
2062
2063 if (ntxq <= pkt_dev->queue_map_min) {
2064 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2065 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2066 pkt_dev->odevname);
2067 pkt_dev->queue_map_min = ntxq - 1;
2068 }
2069 if (pkt_dev->queue_map_max >= ntxq) {
2070 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2071 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2072 pkt_dev->odevname);
2073 pkt_dev->queue_map_max = ntxq - 1;
2074 }
2075
2076 /* Default to the interface's mac if not explicitly set. */
2077
2078 if (is_zero_ether_addr(pkt_dev->src_mac))
2079 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2080
2081 /* Set up Dest MAC */
2082 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2083
2084 /* Set up pkt size */
2085 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2086
2087 if (pkt_dev->flags & F_IPV6) {
2088 /*
2089 * Skip this automatic address setting until locks or functions
2090 * gets exported
2091 */
2092
2093 #ifdef NOTNOW
2094 int i, set = 0, err = 1;
2095 struct inet6_dev *idev;
2096
2097 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2098 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2099 set = 1;
2100 break;
2101 }
2102
2103 if (!set) {
2104
2105 /*
2106 * Use linklevel address if unconfigured.
2107 *
2108 * use ipv6_get_lladdr if/when it's get exported
2109 */
2110
2111 rcu_read_lock();
2112 idev = __in6_dev_get(pkt_dev->odev);
2113 if (idev) {
2114 struct inet6_ifaddr *ifp;
2115
2116 read_lock_bh(&idev->lock);
2117 for (ifp = idev->addr_list; ifp;
2118 ifp = ifp->if_next) {
2119 if (ifp->scope == IFA_LINK &&
2120 !(ifp->flags & IFA_F_TENTATIVE)) {
2121 ipv6_addr_copy(&pkt_dev->
2122 cur_in6_saddr,
2123 &ifp->addr);
2124 err = 0;
2125 break;
2126 }
2127 }
2128 read_unlock_bh(&idev->lock);
2129 }
2130 rcu_read_unlock();
2131 if (err)
2132 pr_err("ERROR: IPv6 link address not available\n");
2133 }
2134 #endif
2135 } else {
2136 pkt_dev->saddr_min = 0;
2137 pkt_dev->saddr_max = 0;
2138 if (strlen(pkt_dev->src_min) == 0) {
2139
2140 struct in_device *in_dev;
2141
2142 rcu_read_lock();
2143 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2144 if (in_dev) {
2145 if (in_dev->ifa_list) {
2146 pkt_dev->saddr_min =
2147 in_dev->ifa_list->ifa_address;
2148 pkt_dev->saddr_max = pkt_dev->saddr_min;
2149 }
2150 }
2151 rcu_read_unlock();
2152 } else {
2153 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2154 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2155 }
2156
2157 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2158 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2159 }
2160 /* Initialize current values. */
2161 pkt_dev->cur_dst_mac_offset = 0;
2162 pkt_dev->cur_src_mac_offset = 0;
2163 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2164 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2165 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2166 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2167 pkt_dev->nflows = 0;
2168 }
2169
2170
2171 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2172 {
2173 ktime_t start_time, end_time;
2174 s64 remaining;
2175 struct hrtimer_sleeper t;
2176
2177 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2178 hrtimer_set_expires(&t.timer, spin_until);
2179
2180 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2181 if (remaining <= 0) {
2182 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2183 return;
2184 }
2185
2186 start_time = ktime_now();
2187 if (remaining < 100000)
2188 ndelay(remaining); /* really small just spin */
2189 else {
2190 /* see do_nanosleep */
2191 hrtimer_init_sleeper(&t, current);
2192 do {
2193 set_current_state(TASK_INTERRUPTIBLE);
2194 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2195 if (!hrtimer_active(&t.timer))
2196 t.task = NULL;
2197
2198 if (likely(t.task))
2199 schedule();
2200
2201 hrtimer_cancel(&t.timer);
2202 } while (t.task && pkt_dev->running && !signal_pending(current));
2203 __set_current_state(TASK_RUNNING);
2204 }
2205 end_time = ktime_now();
2206
2207 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2208 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2209 }
2210
2211 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2212 {
2213 pkt_dev->pkt_overhead = 0;
2214 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2215 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2216 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2217 }
2218
2219 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2220 {
2221 return !!(pkt_dev->flows[flow].flags & F_INIT);
2222 }
2223
2224 static inline int f_pick(struct pktgen_dev *pkt_dev)
2225 {
2226 int flow = pkt_dev->curfl;
2227
2228 if (pkt_dev->flags & F_FLOW_SEQ) {
2229 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2230 /* reset time */
2231 pkt_dev->flows[flow].count = 0;
2232 pkt_dev->flows[flow].flags = 0;
2233 pkt_dev->curfl += 1;
2234 if (pkt_dev->curfl >= pkt_dev->cflows)
2235 pkt_dev->curfl = 0; /*reset */
2236 }
2237 } else {
2238 flow = random32() % pkt_dev->cflows;
2239 pkt_dev->curfl = flow;
2240
2241 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2242 pkt_dev->flows[flow].count = 0;
2243 pkt_dev->flows[flow].flags = 0;
2244 }
2245 }
2246
2247 return pkt_dev->curfl;
2248 }
2249
2250
2251 #ifdef CONFIG_XFRM
2252 /* If there was already an IPSEC SA, we keep it as is, else
2253 * we go look for it ...
2254 */
2255 #define DUMMY_MARK 0
2256 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2257 {
2258 struct xfrm_state *x = pkt_dev->flows[flow].x;
2259 if (!x) {
2260 /*slow path: we dont already have xfrm_state*/
2261 x = xfrm_stateonly_find(&init_net, DUMMY_MARK,
2262 (xfrm_address_t *)&pkt_dev->cur_daddr,
2263 (xfrm_address_t *)&pkt_dev->cur_saddr,
2264 AF_INET,
2265 pkt_dev->ipsmode,
2266 pkt_dev->ipsproto, 0);
2267 if (x) {
2268 pkt_dev->flows[flow].x = x;
2269 set_pkt_overhead(pkt_dev);
2270 pkt_dev->pkt_overhead += x->props.header_len;
2271 }
2272
2273 }
2274 }
2275 #endif
2276 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2277 {
2278
2279 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2280 pkt_dev->cur_queue_map = smp_processor_id();
2281
2282 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2283 __u16 t;
2284 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2285 t = random32() %
2286 (pkt_dev->queue_map_max -
2287 pkt_dev->queue_map_min + 1)
2288 + pkt_dev->queue_map_min;
2289 } else {
2290 t = pkt_dev->cur_queue_map + 1;
2291 if (t > pkt_dev->queue_map_max)
2292 t = pkt_dev->queue_map_min;
2293 }
2294 pkt_dev->cur_queue_map = t;
2295 }
2296 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2297 }
2298
2299 /* Increment/randomize headers according to flags and current values
2300 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2301 */
2302 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2303 {
2304 __u32 imn;
2305 __u32 imx;
2306 int flow = 0;
2307
2308 if (pkt_dev->cflows)
2309 flow = f_pick(pkt_dev);
2310
2311 /* Deal with source MAC */
2312 if (pkt_dev->src_mac_count > 1) {
2313 __u32 mc;
2314 __u32 tmp;
2315
2316 if (pkt_dev->flags & F_MACSRC_RND)
2317 mc = random32() % pkt_dev->src_mac_count;
2318 else {
2319 mc = pkt_dev->cur_src_mac_offset++;
2320 if (pkt_dev->cur_src_mac_offset >=
2321 pkt_dev->src_mac_count)
2322 pkt_dev->cur_src_mac_offset = 0;
2323 }
2324
2325 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2326 pkt_dev->hh[11] = tmp;
2327 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2328 pkt_dev->hh[10] = tmp;
2329 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2330 pkt_dev->hh[9] = tmp;
2331 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2332 pkt_dev->hh[8] = tmp;
2333 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2334 pkt_dev->hh[7] = tmp;
2335 }
2336
2337 /* Deal with Destination MAC */
2338 if (pkt_dev->dst_mac_count > 1) {
2339 __u32 mc;
2340 __u32 tmp;
2341
2342 if (pkt_dev->flags & F_MACDST_RND)
2343 mc = random32() % pkt_dev->dst_mac_count;
2344
2345 else {
2346 mc = pkt_dev->cur_dst_mac_offset++;
2347 if (pkt_dev->cur_dst_mac_offset >=
2348 pkt_dev->dst_mac_count) {
2349 pkt_dev->cur_dst_mac_offset = 0;
2350 }
2351 }
2352
2353 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2354 pkt_dev->hh[5] = tmp;
2355 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2356 pkt_dev->hh[4] = tmp;
2357 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2358 pkt_dev->hh[3] = tmp;
2359 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2360 pkt_dev->hh[2] = tmp;
2361 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2362 pkt_dev->hh[1] = tmp;
2363 }
2364
2365 if (pkt_dev->flags & F_MPLS_RND) {
2366 unsigned i;
2367 for (i = 0; i < pkt_dev->nr_labels; i++)
2368 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2369 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2370 ((__force __be32)random32() &
2371 htonl(0x000fffff));
2372 }
2373
2374 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2375 pkt_dev->vlan_id = random32() & (4096-1);
2376 }
2377
2378 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2379 pkt_dev->svlan_id = random32() & (4096 - 1);
2380 }
2381
2382 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2383 if (pkt_dev->flags & F_UDPSRC_RND)
2384 pkt_dev->cur_udp_src = random32() %
2385 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2386 + pkt_dev->udp_src_min;
2387
2388 else {
2389 pkt_dev->cur_udp_src++;
2390 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2391 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2392 }
2393 }
2394
2395 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2396 if (pkt_dev->flags & F_UDPDST_RND) {
2397 pkt_dev->cur_udp_dst = random32() %
2398 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2399 + pkt_dev->udp_dst_min;
2400 } else {
2401 pkt_dev->cur_udp_dst++;
2402 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2403 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2404 }
2405 }
2406
2407 if (!(pkt_dev->flags & F_IPV6)) {
2408
2409 imn = ntohl(pkt_dev->saddr_min);
2410 imx = ntohl(pkt_dev->saddr_max);
2411 if (imn < imx) {
2412 __u32 t;
2413 if (pkt_dev->flags & F_IPSRC_RND)
2414 t = random32() % (imx - imn) + imn;
2415 else {
2416 t = ntohl(pkt_dev->cur_saddr);
2417 t++;
2418 if (t > imx)
2419 t = imn;
2420
2421 }
2422 pkt_dev->cur_saddr = htonl(t);
2423 }
2424
2425 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2426 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2427 } else {
2428 imn = ntohl(pkt_dev->daddr_min);
2429 imx = ntohl(pkt_dev->daddr_max);
2430 if (imn < imx) {
2431 __u32 t;
2432 __be32 s;
2433 if (pkt_dev->flags & F_IPDST_RND) {
2434
2435 t = random32() % (imx - imn) + imn;
2436 s = htonl(t);
2437
2438 while (ipv4_is_loopback(s) ||
2439 ipv4_is_multicast(s) ||
2440 ipv4_is_lbcast(s) ||
2441 ipv4_is_zeronet(s) ||
2442 ipv4_is_local_multicast(s)) {
2443 t = random32() % (imx - imn) + imn;
2444 s = htonl(t);
2445 }
2446 pkt_dev->cur_daddr = s;
2447 } else {
2448 t = ntohl(pkt_dev->cur_daddr);
2449 t++;
2450 if (t > imx) {
2451 t = imn;
2452 }
2453 pkt_dev->cur_daddr = htonl(t);
2454 }
2455 }
2456 if (pkt_dev->cflows) {
2457 pkt_dev->flows[flow].flags |= F_INIT;
2458 pkt_dev->flows[flow].cur_daddr =
2459 pkt_dev->cur_daddr;
2460 #ifdef CONFIG_XFRM
2461 if (pkt_dev->flags & F_IPSEC_ON)
2462 get_ipsec_sa(pkt_dev, flow);
2463 #endif
2464 pkt_dev->nflows++;
2465 }
2466 }
2467 } else { /* IPV6 * */
2468
2469 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2470 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2471 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2472 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2473 else {
2474 int i;
2475
2476 /* Only random destinations yet */
2477
2478 for (i = 0; i < 4; i++) {
2479 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2480 (((__force __be32)random32() |
2481 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2482 pkt_dev->max_in6_daddr.s6_addr32[i]);
2483 }
2484 }
2485 }
2486
2487 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2488 __u32 t;
2489 if (pkt_dev->flags & F_TXSIZE_RND) {
2490 t = random32() %
2491 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2492 + pkt_dev->min_pkt_size;
2493 } else {
2494 t = pkt_dev->cur_pkt_size + 1;
2495 if (t > pkt_dev->max_pkt_size)
2496 t = pkt_dev->min_pkt_size;
2497 }
2498 pkt_dev->cur_pkt_size = t;
2499 }
2500
2501 set_cur_queue_map(pkt_dev);
2502
2503 pkt_dev->flows[flow].count++;
2504 }
2505
2506
2507 #ifdef CONFIG_XFRM
2508 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2509 {
2510 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2511 int err = 0;
2512 struct iphdr *iph;
2513
2514 if (!x)
2515 return 0;
2516 /* XXX: we dont support tunnel mode for now until
2517 * we resolve the dst issue */
2518 if (x->props.mode != XFRM_MODE_TRANSPORT)
2519 return 0;
2520
2521 spin_lock(&x->lock);
2522 iph = ip_hdr(skb);
2523
2524 err = x->outer_mode->output(x, skb);
2525 if (err)
2526 goto error;
2527 err = x->type->output(x, skb);
2528 if (err)
2529 goto error;
2530
2531 x->curlft.bytes += skb->len;
2532 x->curlft.packets++;
2533 error:
2534 spin_unlock(&x->lock);
2535 return err;
2536 }
2537
2538 static void free_SAs(struct pktgen_dev *pkt_dev)
2539 {
2540 if (pkt_dev->cflows) {
2541 /* let go of the SAs if we have them */
2542 int i;
2543 for (i = 0; i < pkt_dev->cflows; i++) {
2544 struct xfrm_state *x = pkt_dev->flows[i].x;
2545 if (x) {
2546 xfrm_state_put(x);
2547 pkt_dev->flows[i].x = NULL;
2548 }
2549 }
2550 }
2551 }
2552
2553 static int process_ipsec(struct pktgen_dev *pkt_dev,
2554 struct sk_buff *skb, __be16 protocol)
2555 {
2556 if (pkt_dev->flags & F_IPSEC_ON) {
2557 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2558 int nhead = 0;
2559 if (x) {
2560 int ret;
2561 __u8 *eth;
2562 nhead = x->props.header_len - skb_headroom(skb);
2563 if (nhead > 0) {
2564 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2565 if (ret < 0) {
2566 pr_err("Error expanding ipsec packet %d\n",
2567 ret);
2568 goto err;
2569 }
2570 }
2571
2572 /* ipsec is not expecting ll header */
2573 skb_pull(skb, ETH_HLEN);
2574 ret = pktgen_output_ipsec(skb, pkt_dev);
2575 if (ret) {
2576 pr_err("Error creating ipsec packet %d\n", ret);
2577 goto err;
2578 }
2579 /* restore ll */
2580 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2581 memcpy(eth, pkt_dev->hh, 12);
2582 *(u16 *) &eth[12] = protocol;
2583 }
2584 }
2585 return 1;
2586 err:
2587 kfree_skb(skb);
2588 return 0;
2589 }
2590 #endif
2591
2592 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2593 {
2594 unsigned i;
2595 for (i = 0; i < pkt_dev->nr_labels; i++)
2596 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2597
2598 mpls--;
2599 *mpls |= MPLS_STACK_BOTTOM;
2600 }
2601
2602 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2603 unsigned int prio)
2604 {
2605 return htons(id | (cfi << 12) | (prio << 13));
2606 }
2607
2608 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2609 struct pktgen_dev *pkt_dev)
2610 {
2611 struct sk_buff *skb = NULL;
2612 __u8 *eth;
2613 struct udphdr *udph;
2614 int datalen, iplen;
2615 struct iphdr *iph;
2616 struct pktgen_hdr *pgh = NULL;
2617 __be16 protocol = htons(ETH_P_IP);
2618 __be32 *mpls;
2619 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2620 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2621 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2622 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2623 u16 queue_map;
2624
2625 if (pkt_dev->nr_labels)
2626 protocol = htons(ETH_P_MPLS_UC);
2627
2628 if (pkt_dev->vlan_id != 0xffff)
2629 protocol = htons(ETH_P_8021Q);
2630
2631 /* Update any of the values, used when we're incrementing various
2632 * fields.
2633 */
2634 mod_cur_headers(pkt_dev);
2635 queue_map = pkt_dev->cur_queue_map;
2636
2637 datalen = (odev->hard_header_len + 16) & ~0xf;
2638
2639 if (pkt_dev->flags & F_NODE) {
2640 int node;
2641
2642 if (pkt_dev->node >= 0)
2643 node = pkt_dev->node;
2644 else
2645 node = numa_node_id();
2646
2647 skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64
2648 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node);
2649 if (likely(skb)) {
2650 skb_reserve(skb, NET_SKB_PAD);
2651 skb->dev = odev;
2652 }
2653 }
2654 else
2655 skb = __netdev_alloc_skb(odev,
2656 pkt_dev->cur_pkt_size + 64
2657 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2658
2659 if (!skb) {
2660 sprintf(pkt_dev->result, "No memory");
2661 return NULL;
2662 }
2663 prefetchw(skb->data);
2664
2665 skb_reserve(skb, datalen);
2666
2667 /* Reserve for ethernet and IP header */
2668 eth = (__u8 *) skb_push(skb, 14);
2669 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2670 if (pkt_dev->nr_labels)
2671 mpls_push(mpls, pkt_dev);
2672
2673 if (pkt_dev->vlan_id != 0xffff) {
2674 if (pkt_dev->svlan_id != 0xffff) {
2675 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2676 *svlan_tci = build_tci(pkt_dev->svlan_id,
2677 pkt_dev->svlan_cfi,
2678 pkt_dev->svlan_p);
2679 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2680 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2681 }
2682 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2683 *vlan_tci = build_tci(pkt_dev->vlan_id,
2684 pkt_dev->vlan_cfi,
2685 pkt_dev->vlan_p);
2686 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2687 *vlan_encapsulated_proto = htons(ETH_P_IP);
2688 }
2689
2690 skb->network_header = skb->tail;
2691 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2692 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2693 skb_set_queue_mapping(skb, queue_map);
2694 skb->priority = pkt_dev->skb_priority;
2695
2696 iph = ip_hdr(skb);
2697 udph = udp_hdr(skb);
2698
2699 memcpy(eth, pkt_dev->hh, 12);
2700 *(__be16 *) & eth[12] = protocol;
2701
2702 /* Eth + IPh + UDPh + mpls */
2703 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2704 pkt_dev->pkt_overhead;
2705 if (datalen < sizeof(struct pktgen_hdr))
2706 datalen = sizeof(struct pktgen_hdr);
2707
2708 udph->source = htons(pkt_dev->cur_udp_src);
2709 udph->dest = htons(pkt_dev->cur_udp_dst);
2710 udph->len = htons(datalen + 8); /* DATA + udphdr */
2711 udph->check = 0; /* No checksum */
2712
2713 iph->ihl = 5;
2714 iph->version = 4;
2715 iph->ttl = 32;
2716 iph->tos = pkt_dev->tos;
2717 iph->protocol = IPPROTO_UDP; /* UDP */
2718 iph->saddr = pkt_dev->cur_saddr;
2719 iph->daddr = pkt_dev->cur_daddr;
2720 iph->id = htons(pkt_dev->ip_id);
2721 pkt_dev->ip_id++;
2722 iph->frag_off = 0;
2723 iplen = 20 + 8 + datalen;
2724 iph->tot_len = htons(iplen);
2725 iph->check = 0;
2726 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2727 skb->protocol = protocol;
2728 skb->mac_header = (skb->network_header - ETH_HLEN -
2729 pkt_dev->pkt_overhead);
2730 skb->dev = odev;
2731 skb->pkt_type = PACKET_HOST;
2732
2733 if (pkt_dev->nfrags <= 0) {
2734 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2735 memset(pgh + 1, 0, datalen - sizeof(struct pktgen_hdr));
2736 } else {
2737 int frags = pkt_dev->nfrags;
2738 int i, len;
2739
2740 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2741
2742 if (frags > MAX_SKB_FRAGS)
2743 frags = MAX_SKB_FRAGS;
2744 if (datalen > frags * PAGE_SIZE) {
2745 len = datalen - frags * PAGE_SIZE;
2746 memset(skb_put(skb, len), 0, len);
2747 datalen = frags * PAGE_SIZE;
2748 }
2749
2750 i = 0;
2751 while (datalen > 0) {
2752 struct page *page = alloc_pages(GFP_KERNEL | __GFP_ZERO, 0);
2753 skb_shinfo(skb)->frags[i].page = page;
2754 skb_shinfo(skb)->frags[i].page_offset = 0;
2755 skb_shinfo(skb)->frags[i].size =
2756 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2757 datalen -= skb_shinfo(skb)->frags[i].size;
2758 skb->len += skb_shinfo(skb)->frags[i].size;
2759 skb->data_len += skb_shinfo(skb)->frags[i].size;
2760 i++;
2761 skb_shinfo(skb)->nr_frags = i;
2762 }
2763
2764 while (i < frags) {
2765 int rem;
2766
2767 if (i == 0)
2768 break;
2769
2770 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2771 if (rem == 0)
2772 break;
2773
2774 skb_shinfo(skb)->frags[i - 1].size -= rem;
2775
2776 skb_shinfo(skb)->frags[i] =
2777 skb_shinfo(skb)->frags[i - 1];
2778 get_page(skb_shinfo(skb)->frags[i].page);
2779 skb_shinfo(skb)->frags[i].page =
2780 skb_shinfo(skb)->frags[i - 1].page;
2781 skb_shinfo(skb)->frags[i].page_offset +=
2782 skb_shinfo(skb)->frags[i - 1].size;
2783 skb_shinfo(skb)->frags[i].size = rem;
2784 i++;
2785 skb_shinfo(skb)->nr_frags = i;
2786 }
2787 }
2788
2789 /* Stamp the time, and sequence number,
2790 * convert them to network byte order
2791 */
2792 if (pgh) {
2793 struct timeval timestamp;
2794
2795 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2796 pgh->seq_num = htonl(pkt_dev->seq_num);
2797
2798 do_gettimeofday(&timestamp);
2799 pgh->tv_sec = htonl(timestamp.tv_sec);
2800 pgh->tv_usec = htonl(timestamp.tv_usec);
2801 }
2802
2803 #ifdef CONFIG_XFRM
2804 if (!process_ipsec(pkt_dev, skb, protocol))
2805 return NULL;
2806 #endif
2807
2808 return skb;
2809 }
2810
2811 /*
2812 * scan_ip6, fmt_ip taken from dietlibc-0.21
2813 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2814 *
2815 * Slightly modified for kernel.
2816 * Should be candidate for net/ipv4/utils.c
2817 * --ro
2818 */
2819
2820 static unsigned int scan_ip6(const char *s, char ip[16])
2821 {
2822 unsigned int i;
2823 unsigned int len = 0;
2824 unsigned long u;
2825 char suffix[16];
2826 unsigned int prefixlen = 0;
2827 unsigned int suffixlen = 0;
2828 __be32 tmp;
2829 char *pos;
2830
2831 for (i = 0; i < 16; i++)
2832 ip[i] = 0;
2833
2834 for (;;) {
2835 if (*s == ':') {
2836 len++;
2837 if (s[1] == ':') { /* Found "::", skip to part 2 */
2838 s += 2;
2839 len++;
2840 break;
2841 }
2842 s++;
2843 }
2844
2845 u = simple_strtoul(s, &pos, 16);
2846 i = pos - s;
2847 if (!i)
2848 return 0;
2849 if (prefixlen == 12 && s[i] == '.') {
2850
2851 /* the last 4 bytes may be written as IPv4 address */
2852
2853 tmp = in_aton(s);
2854 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2855 return i + len;
2856 }
2857 ip[prefixlen++] = (u >> 8);
2858 ip[prefixlen++] = (u & 255);
2859 s += i;
2860 len += i;
2861 if (prefixlen == 16)
2862 return len;
2863 }
2864
2865 /* part 2, after "::" */
2866 for (;;) {
2867 if (*s == ':') {
2868 if (suffixlen == 0)
2869 break;
2870 s++;
2871 len++;
2872 } else if (suffixlen != 0)
2873 break;
2874
2875 u = simple_strtol(s, &pos, 16);
2876 i = pos - s;
2877 if (!i) {
2878 if (*s)
2879 len--;
2880 break;
2881 }
2882 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2883 tmp = in_aton(s);
2884 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2885 sizeof(tmp));
2886 suffixlen += 4;
2887 len += strlen(s);
2888 break;
2889 }
2890 suffix[suffixlen++] = (u >> 8);
2891 suffix[suffixlen++] = (u & 255);
2892 s += i;
2893 len += i;
2894 if (prefixlen + suffixlen == 16)
2895 break;
2896 }
2897 for (i = 0; i < suffixlen; i++)
2898 ip[16 - suffixlen + i] = suffix[i];
2899 return len;
2900 }
2901
2902 static char tohex(char hexdigit)
2903 {
2904 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2905 }
2906
2907 static int fmt_xlong(char *s, unsigned int i)
2908 {
2909 char *bak = s;
2910 *s = tohex((i >> 12) & 0xf);
2911 if (s != bak || *s != '0')
2912 ++s;
2913 *s = tohex((i >> 8) & 0xf);
2914 if (s != bak || *s != '0')
2915 ++s;
2916 *s = tohex((i >> 4) & 0xf);
2917 if (s != bak || *s != '0')
2918 ++s;
2919 *s = tohex(i & 0xf);
2920 return s - bak + 1;
2921 }
2922
2923 static unsigned int fmt_ip6(char *s, const char ip[16])
2924 {
2925 unsigned int len;
2926 unsigned int i;
2927 unsigned int temp;
2928 unsigned int compressing;
2929 int j;
2930
2931 len = 0;
2932 compressing = 0;
2933 for (j = 0; j < 16; j += 2) {
2934
2935 #ifdef V4MAPPEDPREFIX
2936 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2937 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2938 temp = strlen(s);
2939 return len + temp;
2940 }
2941 #endif
2942 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2943 (unsigned long)(unsigned char)ip[j + 1];
2944 if (temp == 0) {
2945 if (!compressing) {
2946 compressing = 1;
2947 if (j == 0) {
2948 *s++ = ':';
2949 ++len;
2950 }
2951 }
2952 } else {
2953 if (compressing) {
2954 compressing = 0;
2955 *s++ = ':';
2956 ++len;
2957 }
2958 i = fmt_xlong(s, temp);
2959 len += i;
2960 s += i;
2961 if (j < 14) {
2962 *s++ = ':';
2963 ++len;
2964 }
2965 }
2966 }
2967 if (compressing) {
2968 *s++ = ':';
2969 ++len;
2970 }
2971 *s = 0;
2972 return len;
2973 }
2974
2975 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2976 struct pktgen_dev *pkt_dev)
2977 {
2978 struct sk_buff *skb = NULL;
2979 __u8 *eth;
2980 struct udphdr *udph;
2981 int datalen;
2982 struct ipv6hdr *iph;
2983 struct pktgen_hdr *pgh = NULL;
2984 __be16 protocol = htons(ETH_P_IPV6);
2985 __be32 *mpls;
2986 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2987 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2988 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2989 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2990 u16 queue_map;
2991
2992 if (pkt_dev->nr_labels)
2993 protocol = htons(ETH_P_MPLS_UC);
2994
2995 if (pkt_dev->vlan_id != 0xffff)
2996 protocol = htons(ETH_P_8021Q);
2997
2998 /* Update any of the values, used when we're incrementing various
2999 * fields.
3000 */
3001 mod_cur_headers(pkt_dev);
3002 queue_map = pkt_dev->cur_queue_map;
3003
3004 skb = __netdev_alloc_skb(odev,
3005 pkt_dev->cur_pkt_size + 64
3006 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
3007 if (!skb) {
3008 sprintf(pkt_dev->result, "No memory");
3009 return NULL;
3010 }
3011 prefetchw(skb->data);
3012
3013 skb_reserve(skb, 16);
3014
3015 /* Reserve for ethernet and IP header */
3016 eth = (__u8 *) skb_push(skb, 14);
3017 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
3018 if (pkt_dev->nr_labels)
3019 mpls_push(mpls, pkt_dev);
3020
3021 if (pkt_dev->vlan_id != 0xffff) {
3022 if (pkt_dev->svlan_id != 0xffff) {
3023 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
3024 *svlan_tci = build_tci(pkt_dev->svlan_id,
3025 pkt_dev->svlan_cfi,
3026 pkt_dev->svlan_p);
3027 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
3028 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
3029 }
3030 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
3031 *vlan_tci = build_tci(pkt_dev->vlan_id,
3032 pkt_dev->vlan_cfi,
3033 pkt_dev->vlan_p);
3034 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
3035 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
3036 }
3037
3038 skb->network_header = skb->tail;
3039 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
3040 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
3041 skb_set_queue_mapping(skb, queue_map);
3042 skb->priority = pkt_dev->skb_priority;
3043 iph = ipv6_hdr(skb);
3044 udph = udp_hdr(skb);
3045
3046 memcpy(eth, pkt_dev->hh, 12);
3047 *(__be16 *) &eth[12] = protocol;
3048
3049 /* Eth + IPh + UDPh + mpls */
3050 datalen = pkt_dev->cur_pkt_size - 14 -
3051 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
3052 pkt_dev->pkt_overhead;
3053
3054 if (datalen < sizeof(struct pktgen_hdr)) {
3055 datalen = sizeof(struct pktgen_hdr);
3056 if (net_ratelimit())
3057 pr_info("increased datalen to %d\n", datalen);
3058 }
3059
3060 udph->source = htons(pkt_dev->cur_udp_src);
3061 udph->dest = htons(pkt_dev->cur_udp_dst);
3062 udph->len = htons(datalen + sizeof(struct udphdr));
3063 udph->check = 0; /* No checksum */
3064
3065 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
3066
3067 if (pkt_dev->traffic_class) {
3068 /* Version + traffic class + flow (0) */
3069 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
3070 }
3071
3072 iph->hop_limit = 32;
3073
3074 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
3075 iph->nexthdr = IPPROTO_UDP;
3076
3077 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
3078 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
3079
3080 skb->mac_header = (skb->network_header - ETH_HLEN -
3081 pkt_dev->pkt_overhead);
3082 skb->protocol = protocol;
3083 skb->dev = odev;
3084 skb->pkt_type = PACKET_HOST;
3085
3086 if (pkt_dev->nfrags <= 0)
3087 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
3088 else {
3089 int frags = pkt_dev->nfrags;
3090 int i;
3091
3092 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
3093
3094 if (frags > MAX_SKB_FRAGS)
3095 frags = MAX_SKB_FRAGS;
3096 if (datalen > frags * PAGE_SIZE) {
3097 skb_put(skb, datalen - frags * PAGE_SIZE);
3098 datalen = frags * PAGE_SIZE;
3099 }
3100
3101 i = 0;
3102 while (datalen > 0) {
3103 struct page *page = alloc_pages(GFP_KERNEL, 0);
3104 skb_shinfo(skb)->frags[i].page = page;
3105 skb_shinfo(skb)->frags[i].page_offset = 0;
3106 skb_shinfo(skb)->frags[i].size =
3107 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
3108 datalen -= skb_shinfo(skb)->frags[i].size;
3109 skb->len += skb_shinfo(skb)->frags[i].size;
3110 skb->data_len += skb_shinfo(skb)->frags[i].size;
3111 i++;
3112 skb_shinfo(skb)->nr_frags = i;
3113 }
3114
3115 while (i < frags) {
3116 int rem;
3117
3118 if (i == 0)
3119 break;
3120
3121 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
3122 if (rem == 0)
3123 break;
3124
3125 skb_shinfo(skb)->frags[i - 1].size -= rem;
3126
3127 skb_shinfo(skb)->frags[i] =
3128 skb_shinfo(skb)->frags[i - 1];
3129 get_page(skb_shinfo(skb)->frags[i].page);
3130 skb_shinfo(skb)->frags[i].page =
3131 skb_shinfo(skb)->frags[i - 1].page;
3132 skb_shinfo(skb)->frags[i].page_offset +=
3133 skb_shinfo(skb)->frags[i - 1].size;
3134 skb_shinfo(skb)->frags[i].size = rem;
3135 i++;
3136 skb_shinfo(skb)->nr_frags = i;
3137 }
3138 }
3139
3140 /* Stamp the time, and sequence number,
3141 * convert them to network byte order
3142 * should we update cloned packets too ?
3143 */
3144 if (pgh) {
3145 struct timeval timestamp;
3146
3147 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
3148 pgh->seq_num = htonl(pkt_dev->seq_num);
3149
3150 do_gettimeofday(&timestamp);
3151 pgh->tv_sec = htonl(timestamp.tv_sec);
3152 pgh->tv_usec = htonl(timestamp.tv_usec);
3153 }
3154 /* pkt_dev->seq_num++; FF: you really mean this? */
3155
3156 return skb;
3157 }
3158
3159 static struct sk_buff *fill_packet(struct net_device *odev,
3160 struct pktgen_dev *pkt_dev)
3161 {
3162 if (pkt_dev->flags & F_IPV6)
3163 return fill_packet_ipv6(odev, pkt_dev);
3164 else
3165 return fill_packet_ipv4(odev, pkt_dev);
3166 }
3167
3168 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3169 {
3170 pkt_dev->seq_num = 1;
3171 pkt_dev->idle_acc = 0;
3172 pkt_dev->sofar = 0;
3173 pkt_dev->tx_bytes = 0;
3174 pkt_dev->errors = 0;
3175 }
3176
3177 /* Set up structure for sending pkts, clear counters */
3178
3179 static void pktgen_run(struct pktgen_thread *t)
3180 {
3181 struct pktgen_dev *pkt_dev;
3182 int started = 0;
3183
3184 func_enter();
3185
3186 if_lock(t);
3187 list_for_each_entry(pkt_dev, &t->if_list, list) {
3188
3189 /*
3190 * setup odev and create initial packet.
3191 */
3192 pktgen_setup_inject(pkt_dev);
3193
3194 if (pkt_dev->odev) {
3195 pktgen_clear_counters(pkt_dev);
3196 pkt_dev->running = 1; /* Cranke yeself! */
3197 pkt_dev->skb = NULL;
3198 pkt_dev->started_at =
3199 pkt_dev->next_tx = ktime_now();
3200
3201 set_pkt_overhead(pkt_dev);
3202
3203 strcpy(pkt_dev->result, "Starting");
3204 started++;
3205 } else
3206 strcpy(pkt_dev->result, "Error starting");
3207 }
3208 if_unlock(t);
3209 if (started)
3210 t->control &= ~(T_STOP);
3211 }
3212
3213 static void pktgen_stop_all_threads_ifs(void)
3214 {
3215 struct pktgen_thread *t;
3216
3217 func_enter();
3218
3219 mutex_lock(&pktgen_thread_lock);
3220
3221 list_for_each_entry(t, &pktgen_threads, th_list)
3222 t->control |= T_STOP;
3223
3224 mutex_unlock(&pktgen_thread_lock);
3225 }
3226
3227 static int thread_is_running(const struct pktgen_thread *t)
3228 {
3229 const struct pktgen_dev *pkt_dev;
3230
3231 list_for_each_entry(pkt_dev, &t->if_list, list)
3232 if (pkt_dev->running)
3233 return 1;
3234 return 0;
3235 }
3236
3237 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3238 {
3239 if_lock(t);
3240
3241 while (thread_is_running(t)) {
3242
3243 if_unlock(t);
3244
3245 msleep_interruptible(100);
3246
3247 if (signal_pending(current))
3248 goto signal;
3249 if_lock(t);
3250 }
3251 if_unlock(t);
3252 return 1;
3253 signal:
3254 return 0;
3255 }
3256
3257 static int pktgen_wait_all_threads_run(void)
3258 {
3259 struct pktgen_thread *t;
3260 int sig = 1;
3261
3262 mutex_lock(&pktgen_thread_lock);
3263
3264 list_for_each_entry(t, &pktgen_threads, th_list) {
3265 sig = pktgen_wait_thread_run(t);
3266 if (sig == 0)
3267 break;
3268 }
3269
3270 if (sig == 0)
3271 list_for_each_entry(t, &pktgen_threads, th_list)
3272 t->control |= (T_STOP);
3273
3274 mutex_unlock(&pktgen_thread_lock);
3275 return sig;
3276 }
3277
3278 static void pktgen_run_all_threads(void)
3279 {
3280 struct pktgen_thread *t;
3281
3282 func_enter();
3283
3284 mutex_lock(&pktgen_thread_lock);
3285
3286 list_for_each_entry(t, &pktgen_threads, th_list)
3287 t->control |= (T_RUN);
3288
3289 mutex_unlock(&pktgen_thread_lock);
3290
3291 /* Propagate thread->control */
3292 schedule_timeout_interruptible(msecs_to_jiffies(125));
3293
3294 pktgen_wait_all_threads_run();
3295 }
3296
3297 static void pktgen_reset_all_threads(void)
3298 {
3299 struct pktgen_thread *t;
3300
3301 func_enter();
3302
3303 mutex_lock(&pktgen_thread_lock);
3304
3305 list_for_each_entry(t, &pktgen_threads, th_list)
3306 t->control |= (T_REMDEVALL);
3307
3308 mutex_unlock(&pktgen_thread_lock);
3309
3310 /* Propagate thread->control */
3311 schedule_timeout_interruptible(msecs_to_jiffies(125));
3312
3313 pktgen_wait_all_threads_run();
3314 }
3315
3316 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3317 {
3318 __u64 bps, mbps, pps;
3319 char *p = pkt_dev->result;
3320 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3321 pkt_dev->started_at);
3322 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3323
3324 p += sprintf(p, "OK: %llu(c%llu+d%llu) nsec, %llu (%dbyte,%dfrags)\n",
3325 (unsigned long long)ktime_to_us(elapsed),
3326 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3327 (unsigned long long)ktime_to_us(idle),
3328 (unsigned long long)pkt_dev->sofar,
3329 pkt_dev->cur_pkt_size, nr_frags);
3330
3331 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3332 ktime_to_ns(elapsed));
3333
3334 bps = pps * 8 * pkt_dev->cur_pkt_size;
3335
3336 mbps = bps;
3337 do_div(mbps, 1000000);
3338 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3339 (unsigned long long)pps,
3340 (unsigned long long)mbps,
3341 (unsigned long long)bps,
3342 (unsigned long long)pkt_dev->errors);
3343 }
3344
3345 /* Set stopped-at timer, remove from running list, do counters & statistics */
3346 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3347 {
3348 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3349
3350 if (!pkt_dev->running) {
3351 pr_warning("interface: %s is already stopped\n",
3352 pkt_dev->odevname);
3353 return -EINVAL;
3354 }
3355
3356 kfree_skb(pkt_dev->skb);
3357 pkt_dev->skb = NULL;
3358 pkt_dev->stopped_at = ktime_now();
3359 pkt_dev->running = 0;
3360
3361 show_results(pkt_dev, nr_frags);
3362
3363 return 0;
3364 }
3365
3366 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3367 {
3368 struct pktgen_dev *pkt_dev, *best = NULL;
3369
3370 if_lock(t);
3371
3372 list_for_each_entry(pkt_dev, &t->if_list, list) {
3373 if (!pkt_dev->running)
3374 continue;
3375 if (best == NULL)
3376 best = pkt_dev;
3377 else if (ktime_lt(pkt_dev->next_tx, best->next_tx))
3378 best = pkt_dev;
3379 }
3380 if_unlock(t);
3381 return best;
3382 }
3383
3384 static void pktgen_stop(struct pktgen_thread *t)
3385 {
3386 struct pktgen_dev *pkt_dev;
3387
3388 func_enter();
3389
3390 if_lock(t);
3391
3392 list_for_each_entry(pkt_dev, &t->if_list, list) {
3393 pktgen_stop_device(pkt_dev);
3394 }
3395
3396 if_unlock(t);
3397 }
3398
3399 /*
3400 * one of our devices needs to be removed - find it
3401 * and remove it
3402 */
3403 static void pktgen_rem_one_if(struct pktgen_thread *t)
3404 {
3405 struct list_head *q, *n;
3406 struct pktgen_dev *cur;
3407
3408 func_enter();
3409
3410 if_lock(t);
3411
3412 list_for_each_safe(q, n, &t->if_list) {
3413 cur = list_entry(q, struct pktgen_dev, list);
3414
3415 if (!cur->removal_mark)
3416 continue;
3417
3418 kfree_skb(cur->skb);
3419 cur->skb = NULL;
3420
3421 pktgen_remove_device(t, cur);
3422
3423 break;
3424 }
3425
3426 if_unlock(t);
3427 }
3428
3429 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3430 {
3431 struct list_head *q, *n;
3432 struct pktgen_dev *cur;
3433
3434 func_enter();
3435
3436 /* Remove all devices, free mem */
3437
3438 if_lock(t);
3439
3440 list_for_each_safe(q, n, &t->if_list) {
3441 cur = list_entry(q, struct pktgen_dev, list);
3442
3443 kfree_skb(cur->skb);
3444 cur->skb = NULL;
3445
3446 pktgen_remove_device(t, cur);
3447 }
3448
3449 if_unlock(t);
3450 }
3451
3452 static void pktgen_rem_thread(struct pktgen_thread *t)
3453 {
3454 /* Remove from the thread list */
3455
3456 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3457
3458 }
3459
3460 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3461 {
3462 ktime_t idle_start = ktime_now();
3463 schedule();
3464 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3465 }
3466
3467 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3468 {
3469 ktime_t idle_start = ktime_now();
3470
3471 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3472 if (signal_pending(current))
3473 break;
3474
3475 if (need_resched())
3476 pktgen_resched(pkt_dev);
3477 else
3478 cpu_relax();
3479 }
3480 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3481 }
3482
3483 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3484 {
3485 struct net_device *odev = pkt_dev->odev;
3486 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3487 = odev->netdev_ops->ndo_start_xmit;
3488 struct netdev_queue *txq;
3489 u16 queue_map;
3490 int ret;
3491
3492 /* If device is offline, then don't send */
3493 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3494 pktgen_stop_device(pkt_dev);
3495 return;
3496 }
3497
3498 /* This is max DELAY, this has special meaning of
3499 * "never transmit"
3500 */
3501 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3502 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX);
3503 return;
3504 }
3505
3506 /* If no skb or clone count exhausted then get new one */
3507 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3508 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3509 /* build a new pkt */
3510 kfree_skb(pkt_dev->skb);
3511
3512 pkt_dev->skb = fill_packet(odev, pkt_dev);
3513 if (pkt_dev->skb == NULL) {
3514 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3515 schedule();
3516 pkt_dev->clone_count--; /* back out increment, OOM */
3517 return;
3518 }
3519 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3520 pkt_dev->allocated_skbs++;
3521 pkt_dev->clone_count = 0; /* reset counter */
3522 }
3523
3524 if (pkt_dev->delay && pkt_dev->last_ok)
3525 spin(pkt_dev, pkt_dev->next_tx);
3526
3527 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3528 txq = netdev_get_tx_queue(odev, queue_map);
3529
3530 __netif_tx_lock_bh(txq);
3531
3532 if (unlikely(netif_tx_queue_frozen_or_stopped(txq))) {
3533 ret = NETDEV_TX_BUSY;
3534 pkt_dev->last_ok = 0;
3535 goto unlock;
3536 }
3537 atomic_inc(&(pkt_dev->skb->users));
3538 ret = (*xmit)(pkt_dev->skb, odev);
3539
3540 switch (ret) {
3541 case NETDEV_TX_OK:
3542 txq_trans_update(txq);
3543 pkt_dev->last_ok = 1;
3544 pkt_dev->sofar++;
3545 pkt_dev->seq_num++;
3546 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3547 break;
3548 case NET_XMIT_DROP:
3549 case NET_XMIT_CN:
3550 case NET_XMIT_POLICED:
3551 /* skb has been consumed */
3552 pkt_dev->errors++;
3553 break;
3554 default: /* Drivers are not supposed to return other values! */
3555 if (net_ratelimit())
3556 pr_info("%s xmit error: %d\n", pkt_dev->odevname, ret);
3557 pkt_dev->errors++;
3558 /* fallthru */
3559 case NETDEV_TX_LOCKED:
3560 case NETDEV_TX_BUSY:
3561 /* Retry it next time */
3562 atomic_dec(&(pkt_dev->skb->users));
3563 pkt_dev->last_ok = 0;
3564 }
3565 unlock:
3566 __netif_tx_unlock_bh(txq);
3567
3568 /* If pkt_dev->count is zero, then run forever */
3569 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3570 pktgen_wait_for_skb(pkt_dev);
3571
3572 /* Done with this */
3573 pktgen_stop_device(pkt_dev);
3574 }
3575 }
3576
3577 /*
3578 * Main loop of the thread goes here
3579 */
3580
3581 static int pktgen_thread_worker(void *arg)
3582 {
3583 DEFINE_WAIT(wait);
3584 struct pktgen_thread *t = arg;
3585 struct pktgen_dev *pkt_dev = NULL;
3586 int cpu = t->cpu;
3587
3588 BUG_ON(smp_processor_id() != cpu);
3589
3590 init_waitqueue_head(&t->queue);
3591 complete(&t->start_done);
3592
3593 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3594
3595 set_current_state(TASK_INTERRUPTIBLE);
3596
3597 set_freezable();
3598
3599 while (!kthread_should_stop()) {
3600 pkt_dev = next_to_run(t);
3601
3602 if (unlikely(!pkt_dev && t->control == 0)) {
3603 if (pktgen_exiting)
3604 break;
3605 wait_event_interruptible_timeout(t->queue,
3606 t->control != 0,
3607 HZ/10);
3608 try_to_freeze();
3609 continue;
3610 }
3611
3612 __set_current_state(TASK_RUNNING);
3613
3614 if (likely(pkt_dev)) {
3615 pktgen_xmit(pkt_dev);
3616
3617 if (need_resched())
3618 pktgen_resched(pkt_dev);
3619 else
3620 cpu_relax();
3621 }
3622
3623 if (t->control & T_STOP) {
3624 pktgen_stop(t);
3625 t->control &= ~(T_STOP);
3626 }
3627
3628 if (t->control & T_RUN) {
3629 pktgen_run(t);
3630 t->control &= ~(T_RUN);
3631 }
3632
3633 if (t->control & T_REMDEVALL) {
3634 pktgen_rem_all_ifs(t);
3635 t->control &= ~(T_REMDEVALL);
3636 }
3637
3638 if (t->control & T_REMDEV) {
3639 pktgen_rem_one_if(t);
3640 t->control &= ~(T_REMDEV);
3641 }
3642
3643 try_to_freeze();
3644
3645 set_current_state(TASK_INTERRUPTIBLE);
3646 }
3647
3648 pr_debug("%s stopping all device\n", t->tsk->comm);
3649 pktgen_stop(t);
3650
3651 pr_debug("%s removing all device\n", t->tsk->comm);
3652 pktgen_rem_all_ifs(t);
3653
3654 pr_debug("%s removing thread\n", t->tsk->comm);
3655 pktgen_rem_thread(t);
3656
3657 /* Wait for kthread_stop */
3658 while (!kthread_should_stop()) {
3659 set_current_state(TASK_INTERRUPTIBLE);
3660 schedule();
3661 }
3662 __set_current_state(TASK_RUNNING);
3663
3664 return 0;
3665 }
3666
3667 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3668 const char *ifname, bool exact)
3669 {
3670 struct pktgen_dev *p, *pkt_dev = NULL;
3671 size_t len = strlen(ifname);
3672
3673 if_lock(t);
3674 list_for_each_entry(p, &t->if_list, list)
3675 if (strncmp(p->odevname, ifname, len) == 0) {
3676 if (p->odevname[len]) {
3677 if (exact || p->odevname[len] != '@')
3678 continue;
3679 }
3680 pkt_dev = p;
3681 break;
3682 }
3683
3684 if_unlock(t);
3685 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3686 return pkt_dev;
3687 }
3688
3689 /*
3690 * Adds a dev at front of if_list.
3691 */
3692
3693 static int add_dev_to_thread(struct pktgen_thread *t,
3694 struct pktgen_dev *pkt_dev)
3695 {
3696 int rv = 0;
3697
3698 if_lock(t);
3699
3700 if (pkt_dev->pg_thread) {
3701 pr_err("ERROR: already assigned to a thread\n");
3702 rv = -EBUSY;
3703 goto out;
3704 }
3705
3706 list_add(&pkt_dev->list, &t->if_list);
3707 pkt_dev->pg_thread = t;
3708 pkt_dev->running = 0;
3709
3710 out:
3711 if_unlock(t);
3712 return rv;
3713 }
3714
3715 /* Called under thread lock */
3716
3717 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3718 {
3719 struct pktgen_dev *pkt_dev;
3720 int err;
3721 int node = cpu_to_node(t->cpu);
3722
3723 /* We don't allow a device to be on several threads */
3724
3725 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3726 if (pkt_dev) {
3727 pr_err("ERROR: interface already used\n");
3728 return -EBUSY;
3729 }
3730
3731 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3732 if (!pkt_dev)
3733 return -ENOMEM;
3734
3735 strcpy(pkt_dev->odevname, ifname);
3736 pkt_dev->flows = vmalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3737 node);
3738 if (pkt_dev->flows == NULL) {
3739 kfree(pkt_dev);
3740 return -ENOMEM;
3741 }
3742 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3743
3744 pkt_dev->removal_mark = 0;
3745 pkt_dev->min_pkt_size = ETH_ZLEN;
3746 pkt_dev->max_pkt_size = ETH_ZLEN;
3747 pkt_dev->nfrags = 0;
3748 pkt_dev->clone_skb = pg_clone_skb_d;
3749 pkt_dev->delay = pg_delay_d;
3750 pkt_dev->count = pg_count_d;
3751 pkt_dev->sofar = 0;
3752 pkt_dev->udp_src_min = 9; /* sink port */
3753 pkt_dev->udp_src_max = 9;
3754 pkt_dev->udp_dst_min = 9;
3755 pkt_dev->udp_dst_max = 9;
3756
3757 pkt_dev->vlan_p = 0;
3758 pkt_dev->vlan_cfi = 0;
3759 pkt_dev->vlan_id = 0xffff;
3760 pkt_dev->svlan_p = 0;
3761 pkt_dev->svlan_cfi = 0;
3762 pkt_dev->svlan_id = 0xffff;
3763 pkt_dev->node = -1;
3764
3765 err = pktgen_setup_dev(pkt_dev, ifname);
3766 if (err)
3767 goto out1;
3768
3769 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3770 &pktgen_if_fops, pkt_dev);
3771 if (!pkt_dev->entry) {
3772 pr_err("cannot create %s/%s procfs entry\n",
3773 PG_PROC_DIR, ifname);
3774 err = -EINVAL;
3775 goto out2;
3776 }
3777 #ifdef CONFIG_XFRM
3778 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3779 pkt_dev->ipsproto = IPPROTO_ESP;
3780 #endif
3781
3782 return add_dev_to_thread(t, pkt_dev);
3783 out2:
3784 dev_put(pkt_dev->odev);
3785 out1:
3786 #ifdef CONFIG_XFRM
3787 free_SAs(pkt_dev);
3788 #endif
3789 vfree(pkt_dev->flows);
3790 kfree(pkt_dev);
3791 return err;
3792 }
3793
3794 static int __init pktgen_create_thread(int cpu)
3795 {
3796 struct pktgen_thread *t;
3797 struct proc_dir_entry *pe;
3798 struct task_struct *p;
3799
3800 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3801 cpu_to_node(cpu));
3802 if (!t) {
3803 pr_err("ERROR: out of memory, can't create new thread\n");
3804 return -ENOMEM;
3805 }
3806
3807 spin_lock_init(&t->if_lock);
3808 t->cpu = cpu;
3809
3810 INIT_LIST_HEAD(&t->if_list);
3811
3812 list_add_tail(&t->th_list, &pktgen_threads);
3813 init_completion(&t->start_done);
3814
3815 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu);
3816 if (IS_ERR(p)) {
3817 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3818 list_del(&t->th_list);
3819 kfree(t);
3820 return PTR_ERR(p);
3821 }
3822 kthread_bind(p, cpu);
3823 t->tsk = p;
3824
3825 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3826 &pktgen_thread_fops, t);
3827 if (!pe) {
3828 pr_err("cannot create %s/%s procfs entry\n",
3829 PG_PROC_DIR, t->tsk->comm);
3830 kthread_stop(p);
3831 list_del(&t->th_list);
3832 kfree(t);
3833 return -EINVAL;
3834 }
3835
3836 wake_up_process(p);
3837 wait_for_completion(&t->start_done);
3838
3839 return 0;
3840 }
3841
3842 /*
3843 * Removes a device from the thread if_list.
3844 */
3845 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3846 struct pktgen_dev *pkt_dev)
3847 {
3848 struct list_head *q, *n;
3849 struct pktgen_dev *p;
3850
3851 list_for_each_safe(q, n, &t->if_list) {
3852 p = list_entry(q, struct pktgen_dev, list);
3853 if (p == pkt_dev)
3854 list_del(&p->list);
3855 }
3856 }
3857
3858 static int pktgen_remove_device(struct pktgen_thread *t,
3859 struct pktgen_dev *pkt_dev)
3860 {
3861
3862 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3863
3864 if (pkt_dev->running) {
3865 pr_warning("WARNING: trying to remove a running interface, stopping it now\n");
3866 pktgen_stop_device(pkt_dev);
3867 }
3868
3869 /* Dis-associate from the interface */
3870
3871 if (pkt_dev->odev) {
3872 dev_put(pkt_dev->odev);
3873 pkt_dev->odev = NULL;
3874 }
3875
3876 /* And update the thread if_list */
3877
3878 _rem_dev_from_if_list(t, pkt_dev);
3879
3880 if (pkt_dev->entry)
3881 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3882
3883 #ifdef CONFIG_XFRM
3884 free_SAs(pkt_dev);
3885 #endif
3886 vfree(pkt_dev->flows);
3887 kfree(pkt_dev);
3888 return 0;
3889 }
3890
3891 static int __init pg_init(void)
3892 {
3893 int cpu;
3894 struct proc_dir_entry *pe;
3895
3896 pr_info("%s", version);
3897
3898 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3899 if (!pg_proc_dir)
3900 return -ENODEV;
3901
3902 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3903 if (pe == NULL) {
3904 pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL);
3905 proc_net_remove(&init_net, PG_PROC_DIR);
3906 return -EINVAL;
3907 }
3908
3909 /* Register us to receive netdevice events */
3910 register_netdevice_notifier(&pktgen_notifier_block);
3911
3912 for_each_online_cpu(cpu) {
3913 int err;
3914
3915 err = pktgen_create_thread(cpu);
3916 if (err)
3917 pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n",
3918 cpu, err);
3919 }
3920
3921 if (list_empty(&pktgen_threads)) {
3922 pr_err("ERROR: Initialization failed for all threads\n");
3923 unregister_netdevice_notifier(&pktgen_notifier_block);
3924 remove_proc_entry(PGCTRL, pg_proc_dir);
3925 proc_net_remove(&init_net, PG_PROC_DIR);
3926 return -ENODEV;
3927 }
3928
3929 return 0;
3930 }
3931
3932 static void __exit pg_cleanup(void)
3933 {
3934 struct pktgen_thread *t;
3935 struct list_head *q, *n;
3936
3937 /* Stop all interfaces & threads */
3938 pktgen_exiting = true;
3939
3940 list_for_each_safe(q, n, &pktgen_threads) {
3941 t = list_entry(q, struct pktgen_thread, th_list);
3942 kthread_stop(t->tsk);
3943 kfree(t);
3944 }
3945
3946 /* Un-register us from receiving netdevice events */
3947 unregister_netdevice_notifier(&pktgen_notifier_block);
3948
3949 /* Clean up proc file system */
3950 remove_proc_entry(PGCTRL, pg_proc_dir);
3951 proc_net_remove(&init_net, PG_PROC_DIR);
3952 }
3953
3954 module_init(pg_init);
3955 module_exit(pg_cleanup);
3956
3957 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3958 MODULE_DESCRIPTION("Packet Generator tool");
3959 MODULE_LICENSE("GPL");
3960 MODULE_VERSION(VERSION);
3961 module_param(pg_count_d, int, 0);
3962 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3963 module_param(pg_delay_d, int, 0);
3964 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3965 module_param(pg_clone_skb_d, int, 0);
3966 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3967 module_param(debug, int, 0);
3968 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree