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usb: added usb-host functionality for MSM devices amd Leo config file
[htc-linux.git] / net / core / pktgen.c
blob6a993b17ae3fe4cadde190ec24359601d2fafac0
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 #include <linux/sys.h>
119 #include <linux/types.h>
120 #include <linux/module.h>
121 #include <linux/moduleparam.h>
122 #include <linux/kernel.h>
123 #include <linux/mutex.h>
124 #include <linux/sched.h>
125 #include <linux/slab.h>
126 #include <linux/vmalloc.h>
127 #include <linux/unistd.h>
128 #include <linux/string.h>
129 #include <linux/ptrace.h>
130 #include <linux/errno.h>
131 #include <linux/ioport.h>
132 #include <linux/interrupt.h>
133 #include <linux/capability.h>
134 #include <linux/hrtimer.h>
135 #include <linux/freezer.h>
136 #include <linux/delay.h>
137 #include <linux/timer.h>
138 #include <linux/list.h>
139 #include <linux/init.h>
140 #include <linux/skbuff.h>
141 #include <linux/netdevice.h>
142 #include <linux/inet.h>
143 #include <linux/inetdevice.h>
144 #include <linux/rtnetlink.h>
145 #include <linux/if_arp.h>
146 #include <linux/if_vlan.h>
147 #include <linux/in.h>
148 #include <linux/ip.h>
149 #include <linux/ipv6.h>
150 #include <linux/udp.h>
151 #include <linux/proc_fs.h>
152 #include <linux/seq_file.h>
153 #include <linux/wait.h>
154 #include <linux/etherdevice.h>
155 #include <linux/kthread.h>
156 #include <net/net_namespace.h>
157 #include <net/checksum.h>
158 #include <net/ipv6.h>
159 #include <net/addrconf.h>
160 #ifdef CONFIG_XFRM
161 #include <net/xfrm.h>
162 #endif
163 #include <asm/byteorder.h>
164 #include <linux/rcupdate.h>
165 #include <linux/bitops.h>
166 #include <linux/io.h>
167 #include <linux/timex.h>
168 #include <linux/uaccess.h>
169 #include <asm/dma.h>
170 #include <asm/div64.h> /* do_div */
171
172 #define VERSION "2.72"
173 #define IP_NAME_SZ 32
174 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
175 #define MPLS_STACK_BOTTOM htonl(0x00000100)
176
177 /* Device flag bits */
178 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
179 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
180 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
181 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
182 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
183 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
184 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
185 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
186 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
187 #define F_VID_RND (1<<9) /* Random VLAN ID */
188 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
189 #define F_FLOW_SEQ (1<<11) /* Sequential flows */
190 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */
191 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
192 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
193
194 /* Thread control flag bits */
195 #define T_STOP (1<<0) /* Stop run */
196 #define T_RUN (1<<1) /* Start run */
197 #define T_REMDEVALL (1<<2) /* Remove all devs */
198 #define T_REMDEV (1<<3) /* Remove one dev */
199
200 /* If lock -- can be removed after some work */
201 #define if_lock(t) spin_lock(&(t->if_lock));
202 #define if_unlock(t) spin_unlock(&(t->if_lock));
203
204 /* Used to help with determining the pkts on receive */
205 #define PKTGEN_MAGIC 0xbe9be955
206 #define PG_PROC_DIR "pktgen"
207 #define PGCTRL "pgctrl"
208 static struct proc_dir_entry *pg_proc_dir;
209
210 #define MAX_CFLOWS 65536
211
212 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
213 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
214
215 struct flow_state {
216 __be32 cur_daddr;
217 int count;
218 #ifdef CONFIG_XFRM
219 struct xfrm_state *x;
220 #endif
221 __u32 flags;
222 };
223
224 /* flow flag bits */
225 #define F_INIT (1<<0) /* flow has been initialized */
226
227 struct pktgen_dev {
228 /*
229 * Try to keep frequent/infrequent used vars. separated.
230 */
231 struct proc_dir_entry *entry; /* proc file */
232 struct pktgen_thread *pg_thread;/* the owner */
233 struct list_head list; /* chaining in the thread's run-queue */
234
235 int running; /* if false, the test will stop */
236
237 /* If min != max, then we will either do a linear iteration, or
238 * we will do a random selection from within the range.
239 */
240 __u32 flags;
241 int removal_mark; /* non-zero => the device is marked for
242 * removal by worker thread */
243
244 int min_pkt_size; /* = ETH_ZLEN; */
245 int max_pkt_size; /* = ETH_ZLEN; */
246 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
247 int nfrags;
248 u64 delay; /* nano-seconds */
249
250 __u64 count; /* Default No packets to send */
251 __u64 sofar; /* How many pkts we've sent so far */
252 __u64 tx_bytes; /* How many bytes we've transmitted */
253 __u64 errors; /* Errors when trying to transmit,
254 pkts will be re-sent */
255
256 /* runtime counters relating to clone_skb */
257
258 __u64 allocated_skbs;
259 __u32 clone_count;
260 int last_ok; /* Was last skb sent?
261 * Or a failed transmit of some sort?
262 * This will keep sequence numbers in order
263 */
264 ktime_t next_tx;
265 ktime_t started_at;
266 ktime_t stopped_at;
267 u64 idle_acc; /* nano-seconds */
268
269 __u32 seq_num;
270
271 int clone_skb; /*
272 * Use multiple SKBs during packet gen.
273 * If this number is greater than 1, then
274 * that many copies of the same packet will be
275 * sent before a new packet is allocated.
276 * If you want to send 1024 identical packets
277 * before creating a new packet,
278 * set clone_skb to 1024.
279 */
280
281 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
282 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
283 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
284 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
285
286 struct in6_addr in6_saddr;
287 struct in6_addr in6_daddr;
288 struct in6_addr cur_in6_daddr;
289 struct in6_addr cur_in6_saddr;
290 /* For ranges */
291 struct in6_addr min_in6_daddr;
292 struct in6_addr max_in6_daddr;
293 struct in6_addr min_in6_saddr;
294 struct in6_addr max_in6_saddr;
295
296 /* If we're doing ranges, random or incremental, then this
297 * defines the min/max for those ranges.
298 */
299 __be32 saddr_min; /* inclusive, source IP address */
300 __be32 saddr_max; /* exclusive, source IP address */
301 __be32 daddr_min; /* inclusive, dest IP address */
302 __be32 daddr_max; /* exclusive, dest IP address */
303
304 __u16 udp_src_min; /* inclusive, source UDP port */
305 __u16 udp_src_max; /* exclusive, source UDP port */
306 __u16 udp_dst_min; /* inclusive, dest UDP port */
307 __u16 udp_dst_max; /* exclusive, dest UDP port */
308
309 /* DSCP + ECN */
310 __u8 tos; /* six MSB of (former) IPv4 TOS
311 are for dscp codepoint */
312 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
313 (see RFC 3260, sec. 4) */
314
315 /* MPLS */
316 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
317 __be32 labels[MAX_MPLS_LABELS];
318
319 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
320 __u8 vlan_p;
321 __u8 vlan_cfi;
322 __u16 vlan_id; /* 0xffff means no vlan tag */
323
324 __u8 svlan_p;
325 __u8 svlan_cfi;
326 __u16 svlan_id; /* 0xffff means no svlan tag */
327
328 __u32 src_mac_count; /* How many MACs to iterate through */
329 __u32 dst_mac_count; /* How many MACs to iterate through */
330
331 unsigned char dst_mac[ETH_ALEN];
332 unsigned char src_mac[ETH_ALEN];
333
334 __u32 cur_dst_mac_offset;
335 __u32 cur_src_mac_offset;
336 __be32 cur_saddr;
337 __be32 cur_daddr;
338 __u16 ip_id;
339 __u16 cur_udp_dst;
340 __u16 cur_udp_src;
341 __u16 cur_queue_map;
342 __u32 cur_pkt_size;
343
344 __u8 hh[14];
345 /* = {
346 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
347
348 We fill in SRC address later
349 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
350 0x08, 0x00
351 };
352 */
353 __u16 pad; /* pad out the hh struct to an even 16 bytes */
354
355 struct sk_buff *skb; /* skb we are to transmit next, used for when we
356 * are transmitting the same one multiple times
357 */
358 struct net_device *odev; /* The out-going device.
359 * Note that the device should have it's
360 * pg_info pointer pointing back to this
361 * device.
362 * Set when the user specifies the out-going
363 * device name (not when the inject is
364 * started as it used to do.)
365 */
366 char odevname[32];
367 struct flow_state *flows;
368 unsigned cflows; /* Concurrent flows (config) */
369 unsigned lflow; /* Flow length (config) */
370 unsigned nflows; /* accumulated flows (stats) */
371 unsigned curfl; /* current sequenced flow (state)*/
372
373 u16 queue_map_min;
374 u16 queue_map_max;
375
376 #ifdef CONFIG_XFRM
377 __u8 ipsmode; /* IPSEC mode (config) */
378 __u8 ipsproto; /* IPSEC type (config) */
379 #endif
380 char result[512];
381 };
382
383 struct pktgen_hdr {
384 __be32 pgh_magic;
385 __be32 seq_num;
386 __be32 tv_sec;
387 __be32 tv_usec;
388 };
389
390 struct pktgen_thread {
391 spinlock_t if_lock; /* for list of devices */
392 struct list_head if_list; /* All device here */
393 struct list_head th_list;
394 struct task_struct *tsk;
395 char result[512];
396
397 /* Field for thread to receive "posted" events terminate,
398 stop ifs etc. */
399
400 u32 control;
401 int cpu;
402
403 wait_queue_head_t queue;
404 struct completion start_done;
405 };
406
407 #define REMOVE 1
408 #define FIND 0
409
410 static inline ktime_t ktime_now(void)
411 {
412 struct timespec ts;
413 ktime_get_ts(&ts);
414
415 return timespec_to_ktime(ts);
416 }
417
418 /* This works even if 32 bit because of careful byte order choice */
419 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2)
420 {
421 return cmp1.tv64 < cmp2.tv64;
422 }
423
424 static const char version[] =
425 "pktgen " VERSION ": Packet Generator for packet performance testing.\n";
426
427 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
428 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
429 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
430 const char *ifname, bool exact);
431 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
432 static void pktgen_run_all_threads(void);
433 static void pktgen_reset_all_threads(void);
434 static void pktgen_stop_all_threads_ifs(void);
435
436 static void pktgen_stop(struct pktgen_thread *t);
437 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
438
439 static unsigned int scan_ip6(const char *s, char ip[16]);
440 static unsigned int fmt_ip6(char *s, const char ip[16]);
441
442 /* Module parameters, defaults. */
443 static int pg_count_d __read_mostly = 1000;
444 static int pg_delay_d __read_mostly;
445 static int pg_clone_skb_d __read_mostly;
446 static int debug __read_mostly;
447
448 static DEFINE_MUTEX(pktgen_thread_lock);
449 static LIST_HEAD(pktgen_threads);
450
451 static struct notifier_block pktgen_notifier_block = {
452 .notifier_call = pktgen_device_event,
453 };
454
455 /*
456 * /proc handling functions
457 *
458 */
459
460 static int pgctrl_show(struct seq_file *seq, void *v)
461 {
462 seq_puts(seq, version);
463 return 0;
464 }
465
466 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
467 size_t count, loff_t *ppos)
468 {
469 int err = 0;
470 char data[128];
471
472 if (!capable(CAP_NET_ADMIN)) {
473 err = -EPERM;
474 goto out;
475 }
476
477 if (count > sizeof(data))
478 count = sizeof(data);
479
480 if (copy_from_user(data, buf, count)) {
481 err = -EFAULT;
482 goto out;
483 }
484 data[count - 1] = 0; /* Make string */
485
486 if (!strcmp(data, "stop"))
487 pktgen_stop_all_threads_ifs();
488
489 else if (!strcmp(data, "start"))
490 pktgen_run_all_threads();
491
492 else if (!strcmp(data, "reset"))
493 pktgen_reset_all_threads();
494
495 else
496 printk(KERN_WARNING "pktgen: Unknown command: %s\n", data);
497
498 err = count;
499
500 out:
501 return err;
502 }
503
504 static int pgctrl_open(struct inode *inode, struct file *file)
505 {
506 return single_open(file, pgctrl_show, PDE(inode)->data);
507 }
508
509 static const struct file_operations pktgen_fops = {
510 .owner = THIS_MODULE,
511 .open = pgctrl_open,
512 .read = seq_read,
513 .llseek = seq_lseek,
514 .write = pgctrl_write,
515 .release = single_release,
516 };
517
518 static int pktgen_if_show(struct seq_file *seq, void *v)
519 {
520 const struct pktgen_dev *pkt_dev = seq->private;
521 ktime_t stopped;
522 u64 idle;
523
524 seq_printf(seq,
525 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
526 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
527 pkt_dev->max_pkt_size);
528
529 seq_printf(seq,
530 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
531 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
532 pkt_dev->clone_skb, pkt_dev->odevname);
533
534 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
535 pkt_dev->lflow);
536
537 seq_printf(seq,
538 " queue_map_min: %u queue_map_max: %u\n",
539 pkt_dev->queue_map_min,
540 pkt_dev->queue_map_max);
541
542 if (pkt_dev->flags & F_IPV6) {
543 char b1[128], b2[128], b3[128];
544 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
545 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
546 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
547 seq_printf(seq,
548 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
549 b2, b3);
550
551 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
552 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
553 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
554 seq_printf(seq,
555 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
556 b2, b3);
557
558 } else {
559 seq_printf(seq,
560 " dst_min: %s dst_max: %s\n",
561 pkt_dev->dst_min, pkt_dev->dst_max);
562 seq_printf(seq,
563 " src_min: %s src_max: %s\n",
564 pkt_dev->src_min, pkt_dev->src_max);
565 }
566
567 seq_puts(seq, " src_mac: ");
568
569 seq_printf(seq, "%pM ",
570 is_zero_ether_addr(pkt_dev->src_mac) ?
571 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
572
573 seq_printf(seq, "dst_mac: ");
574 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
575
576 seq_printf(seq,
577 " udp_src_min: %d udp_src_max: %d"
578 " udp_dst_min: %d udp_dst_max: %d\n",
579 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
580 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
581
582 seq_printf(seq,
583 " src_mac_count: %d dst_mac_count: %d\n",
584 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
585
586 if (pkt_dev->nr_labels) {
587 unsigned i;
588 seq_printf(seq, " mpls: ");
589 for (i = 0; i < pkt_dev->nr_labels; i++)
590 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
591 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
592 }
593
594 if (pkt_dev->vlan_id != 0xffff)
595 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
596 pkt_dev->vlan_id, pkt_dev->vlan_p,
597 pkt_dev->vlan_cfi);
598
599 if (pkt_dev->svlan_id != 0xffff)
600 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
601 pkt_dev->svlan_id, pkt_dev->svlan_p,
602 pkt_dev->svlan_cfi);
603
604 if (pkt_dev->tos)
605 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
606
607 if (pkt_dev->traffic_class)
608 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
609
610 seq_printf(seq, " Flags: ");
611
612 if (pkt_dev->flags & F_IPV6)
613 seq_printf(seq, "IPV6 ");
614
615 if (pkt_dev->flags & F_IPSRC_RND)
616 seq_printf(seq, "IPSRC_RND ");
617
618 if (pkt_dev->flags & F_IPDST_RND)
619 seq_printf(seq, "IPDST_RND ");
620
621 if (pkt_dev->flags & F_TXSIZE_RND)
622 seq_printf(seq, "TXSIZE_RND ");
623
624 if (pkt_dev->flags & F_UDPSRC_RND)
625 seq_printf(seq, "UDPSRC_RND ");
626
627 if (pkt_dev->flags & F_UDPDST_RND)
628 seq_printf(seq, "UDPDST_RND ");
629
630 if (pkt_dev->flags & F_MPLS_RND)
631 seq_printf(seq, "MPLS_RND ");
632
633 if (pkt_dev->flags & F_QUEUE_MAP_RND)
634 seq_printf(seq, "QUEUE_MAP_RND ");
635
636 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
637 seq_printf(seq, "QUEUE_MAP_CPU ");
638
639 if (pkt_dev->cflows) {
640 if (pkt_dev->flags & F_FLOW_SEQ)
641 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
642 else
643 seq_printf(seq, "FLOW_RND ");
644 }
645
646 #ifdef CONFIG_XFRM
647 if (pkt_dev->flags & F_IPSEC_ON)
648 seq_printf(seq, "IPSEC ");
649 #endif
650
651 if (pkt_dev->flags & F_MACSRC_RND)
652 seq_printf(seq, "MACSRC_RND ");
653
654 if (pkt_dev->flags & F_MACDST_RND)
655 seq_printf(seq, "MACDST_RND ");
656
657 if (pkt_dev->flags & F_VID_RND)
658 seq_printf(seq, "VID_RND ");
659
660 if (pkt_dev->flags & F_SVID_RND)
661 seq_printf(seq, "SVID_RND ");
662
663 seq_puts(seq, "\n");
664
665 /* not really stopped, more like last-running-at */
666 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at;
667 idle = pkt_dev->idle_acc;
668 do_div(idle, NSEC_PER_USEC);
669
670 seq_printf(seq,
671 "Current:\n pkts-sofar: %llu errors: %llu\n",
672 (unsigned long long)pkt_dev->sofar,
673 (unsigned long long)pkt_dev->errors);
674
675 seq_printf(seq,
676 " started: %lluus stopped: %lluus idle: %lluus\n",
677 (unsigned long long) ktime_to_us(pkt_dev->started_at),
678 (unsigned long long) ktime_to_us(stopped),
679 (unsigned long long) idle);
680
681 seq_printf(seq,
682 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
683 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
684 pkt_dev->cur_src_mac_offset);
685
686 if (pkt_dev->flags & F_IPV6) {
687 char b1[128], b2[128];
688 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
689 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
690 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
691 } else
692 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
693 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
694
695 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
696 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
697
698 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
699
700 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
701
702 if (pkt_dev->result[0])
703 seq_printf(seq, "Result: %s\n", pkt_dev->result);
704 else
705 seq_printf(seq, "Result: Idle\n");
706
707 return 0;
708 }
709
710
711 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
712 __u32 *num)
713 {
714 int i = 0;
715 *num = 0;
716
717 for (; i < maxlen; i++) {
718 char c;
719 *num <<= 4;
720 if (get_user(c, &user_buffer[i]))
721 return -EFAULT;
722 if ((c >= '0') && (c <= '9'))
723 *num |= c - '0';
724 else if ((c >= 'a') && (c <= 'f'))
725 *num |= c - 'a' + 10;
726 else if ((c >= 'A') && (c <= 'F'))
727 *num |= c - 'A' + 10;
728 else
729 break;
730 }
731 return i;
732 }
733
734 static int count_trail_chars(const char __user * user_buffer,
735 unsigned int maxlen)
736 {
737 int i;
738
739 for (i = 0; i < maxlen; i++) {
740 char c;
741 if (get_user(c, &user_buffer[i]))
742 return -EFAULT;
743 switch (c) {
744 case '\"':
745 case '\n':
746 case '\r':
747 case '\t':
748 case ' ':
749 case '=':
750 break;
751 default:
752 goto done;
753 }
754 }
755 done:
756 return i;
757 }
758
759 static unsigned long num_arg(const char __user * user_buffer,
760 unsigned long maxlen, unsigned long *num)
761 {
762 int i = 0;
763 *num = 0;
764
765 for (; i < maxlen; i++) {
766 char c;
767 if (get_user(c, &user_buffer[i]))
768 return -EFAULT;
769 if ((c >= '0') && (c <= '9')) {
770 *num *= 10;
771 *num += c - '0';
772 } else
773 break;
774 }
775 return i;
776 }
777
778 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
779 {
780 int i = 0;
781
782 for (; i < maxlen; i++) {
783 char c;
784 if (get_user(c, &user_buffer[i]))
785 return -EFAULT;
786 switch (c) {
787 case '\"':
788 case '\n':
789 case '\r':
790 case '\t':
791 case ' ':
792 goto done_str;
793 break;
794 default:
795 break;
796 }
797 }
798 done_str:
799 return i;
800 }
801
802 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
803 {
804 unsigned n = 0;
805 char c;
806 ssize_t i = 0;
807 int len;
808
809 pkt_dev->nr_labels = 0;
810 do {
811 __u32 tmp;
812 len = hex32_arg(&buffer[i], 8, &tmp);
813 if (len <= 0)
814 return len;
815 pkt_dev->labels[n] = htonl(tmp);
816 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
817 pkt_dev->flags |= F_MPLS_RND;
818 i += len;
819 if (get_user(c, &buffer[i]))
820 return -EFAULT;
821 i++;
822 n++;
823 if (n >= MAX_MPLS_LABELS)
824 return -E2BIG;
825 } while (c == ',');
826
827 pkt_dev->nr_labels = n;
828 return i;
829 }
830
831 static ssize_t pktgen_if_write(struct file *file,
832 const char __user * user_buffer, size_t count,
833 loff_t * offset)
834 {
835 struct seq_file *seq = (struct seq_file *)file->private_data;
836 struct pktgen_dev *pkt_dev = seq->private;
837 int i = 0, max, len;
838 char name[16], valstr[32];
839 unsigned long value = 0;
840 char *pg_result = NULL;
841 int tmp = 0;
842 char buf[128];
843
844 pg_result = &(pkt_dev->result[0]);
845
846 if (count < 1) {
847 printk(KERN_WARNING "pktgen: wrong command format\n");
848 return -EINVAL;
849 }
850
851 max = count - i;
852 tmp = count_trail_chars(&user_buffer[i], max);
853 if (tmp < 0) {
854 printk(KERN_WARNING "pktgen: illegal format\n");
855 return tmp;
856 }
857 i += tmp;
858
859 /* Read variable name */
860
861 len = strn_len(&user_buffer[i], sizeof(name) - 1);
862 if (len < 0)
863 return len;
864
865 memset(name, 0, sizeof(name));
866 if (copy_from_user(name, &user_buffer[i], len))
867 return -EFAULT;
868 i += len;
869
870 max = count - i;
871 len = count_trail_chars(&user_buffer[i], max);
872 if (len < 0)
873 return len;
874
875 i += len;
876
877 if (debug) {
878 char tb[count + 1];
879 if (copy_from_user(tb, user_buffer, count))
880 return -EFAULT;
881 tb[count] = 0;
882 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name,
883 (unsigned long)count, tb);
884 }
885
886 if (!strcmp(name, "min_pkt_size")) {
887 len = num_arg(&user_buffer[i], 10, &value);
888 if (len < 0)
889 return len;
890
891 i += len;
892 if (value < 14 + 20 + 8)
893 value = 14 + 20 + 8;
894 if (value != pkt_dev->min_pkt_size) {
895 pkt_dev->min_pkt_size = value;
896 pkt_dev->cur_pkt_size = value;
897 }
898 sprintf(pg_result, "OK: min_pkt_size=%u",
899 pkt_dev->min_pkt_size);
900 return count;
901 }
902
903 if (!strcmp(name, "max_pkt_size")) {
904 len = num_arg(&user_buffer[i], 10, &value);
905 if (len < 0)
906 return len;
907
908 i += len;
909 if (value < 14 + 20 + 8)
910 value = 14 + 20 + 8;
911 if (value != pkt_dev->max_pkt_size) {
912 pkt_dev->max_pkt_size = value;
913 pkt_dev->cur_pkt_size = value;
914 }
915 sprintf(pg_result, "OK: max_pkt_size=%u",
916 pkt_dev->max_pkt_size);
917 return count;
918 }
919
920 /* Shortcut for min = max */
921
922 if (!strcmp(name, "pkt_size")) {
923 len = num_arg(&user_buffer[i], 10, &value);
924 if (len < 0)
925 return len;
926
927 i += len;
928 if (value < 14 + 20 + 8)
929 value = 14 + 20 + 8;
930 if (value != pkt_dev->min_pkt_size) {
931 pkt_dev->min_pkt_size = value;
932 pkt_dev->max_pkt_size = value;
933 pkt_dev->cur_pkt_size = value;
934 }
935 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
936 return count;
937 }
938
939 if (!strcmp(name, "debug")) {
940 len = num_arg(&user_buffer[i], 10, &value);
941 if (len < 0)
942 return len;
943
944 i += len;
945 debug = value;
946 sprintf(pg_result, "OK: debug=%u", debug);
947 return count;
948 }
949
950 if (!strcmp(name, "frags")) {
951 len = num_arg(&user_buffer[i], 10, &value);
952 if (len < 0)
953 return len;
954
955 i += len;
956 pkt_dev->nfrags = value;
957 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
958 return count;
959 }
960 if (!strcmp(name, "delay")) {
961 len = num_arg(&user_buffer[i], 10, &value);
962 if (len < 0)
963 return len;
964
965 i += len;
966 if (value == 0x7FFFFFFF)
967 pkt_dev->delay = ULLONG_MAX;
968 else
969 pkt_dev->delay = (u64)value;
970
971 sprintf(pg_result, "OK: delay=%llu",
972 (unsigned long long) pkt_dev->delay);
973 return count;
974 }
975 if (!strcmp(name, "udp_src_min")) {
976 len = num_arg(&user_buffer[i], 10, &value);
977 if (len < 0)
978 return len;
979
980 i += len;
981 if (value != pkt_dev->udp_src_min) {
982 pkt_dev->udp_src_min = value;
983 pkt_dev->cur_udp_src = value;
984 }
985 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
986 return count;
987 }
988 if (!strcmp(name, "udp_dst_min")) {
989 len = num_arg(&user_buffer[i], 10, &value);
990 if (len < 0)
991 return len;
992
993 i += len;
994 if (value != pkt_dev->udp_dst_min) {
995 pkt_dev->udp_dst_min = value;
996 pkt_dev->cur_udp_dst = value;
997 }
998 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
999 return count;
1000 }
1001 if (!strcmp(name, "udp_src_max")) {
1002 len = num_arg(&user_buffer[i], 10, &value);
1003 if (len < 0)
1004 return len;
1005
1006 i += len;
1007 if (value != pkt_dev->udp_src_max) {
1008 pkt_dev->udp_src_max = value;
1009 pkt_dev->cur_udp_src = value;
1010 }
1011 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1012 return count;
1013 }
1014 if (!strcmp(name, "udp_dst_max")) {
1015 len = num_arg(&user_buffer[i], 10, &value);
1016 if (len < 0)
1017 return len;
1018
1019 i += len;
1020 if (value != pkt_dev->udp_dst_max) {
1021 pkt_dev->udp_dst_max = value;
1022 pkt_dev->cur_udp_dst = value;
1023 }
1024 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1025 return count;
1026 }
1027 if (!strcmp(name, "clone_skb")) {
1028 len = num_arg(&user_buffer[i], 10, &value);
1029 if (len < 0)
1030 return len;
1031
1032 i += len;
1033 pkt_dev->clone_skb = value;
1034
1035 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1036 return count;
1037 }
1038 if (!strcmp(name, "count")) {
1039 len = num_arg(&user_buffer[i], 10, &value);
1040 if (len < 0)
1041 return len;
1042
1043 i += len;
1044 pkt_dev->count = value;
1045 sprintf(pg_result, "OK: count=%llu",
1046 (unsigned long long)pkt_dev->count);
1047 return count;
1048 }
1049 if (!strcmp(name, "src_mac_count")) {
1050 len = num_arg(&user_buffer[i], 10, &value);
1051 if (len < 0)
1052 return len;
1053
1054 i += len;
1055 if (pkt_dev->src_mac_count != value) {
1056 pkt_dev->src_mac_count = value;
1057 pkt_dev->cur_src_mac_offset = 0;
1058 }
1059 sprintf(pg_result, "OK: src_mac_count=%d",
1060 pkt_dev->src_mac_count);
1061 return count;
1062 }
1063 if (!strcmp(name, "dst_mac_count")) {
1064 len = num_arg(&user_buffer[i], 10, &value);
1065 if (len < 0)
1066 return len;
1067
1068 i += len;
1069 if (pkt_dev->dst_mac_count != value) {
1070 pkt_dev->dst_mac_count = value;
1071 pkt_dev->cur_dst_mac_offset = 0;
1072 }
1073 sprintf(pg_result, "OK: dst_mac_count=%d",
1074 pkt_dev->dst_mac_count);
1075 return count;
1076 }
1077 if (!strcmp(name, "flag")) {
1078 char f[32];
1079 memset(f, 0, 32);
1080 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1081 if (len < 0)
1082 return len;
1083
1084 if (copy_from_user(f, &user_buffer[i], len))
1085 return -EFAULT;
1086 i += len;
1087 if (strcmp(f, "IPSRC_RND") == 0)
1088 pkt_dev->flags |= F_IPSRC_RND;
1089
1090 else if (strcmp(f, "!IPSRC_RND") == 0)
1091 pkt_dev->flags &= ~F_IPSRC_RND;
1092
1093 else if (strcmp(f, "TXSIZE_RND") == 0)
1094 pkt_dev->flags |= F_TXSIZE_RND;
1095
1096 else if (strcmp(f, "!TXSIZE_RND") == 0)
1097 pkt_dev->flags &= ~F_TXSIZE_RND;
1098
1099 else if (strcmp(f, "IPDST_RND") == 0)
1100 pkt_dev->flags |= F_IPDST_RND;
1101
1102 else if (strcmp(f, "!IPDST_RND") == 0)
1103 pkt_dev->flags &= ~F_IPDST_RND;
1104
1105 else if (strcmp(f, "UDPSRC_RND") == 0)
1106 pkt_dev->flags |= F_UDPSRC_RND;
1107
1108 else if (strcmp(f, "!UDPSRC_RND") == 0)
1109 pkt_dev->flags &= ~F_UDPSRC_RND;
1110
1111 else if (strcmp(f, "UDPDST_RND") == 0)
1112 pkt_dev->flags |= F_UDPDST_RND;
1113
1114 else if (strcmp(f, "!UDPDST_RND") == 0)
1115 pkt_dev->flags &= ~F_UDPDST_RND;
1116
1117 else if (strcmp(f, "MACSRC_RND") == 0)
1118 pkt_dev->flags |= F_MACSRC_RND;
1119
1120 else if (strcmp(f, "!MACSRC_RND") == 0)
1121 pkt_dev->flags &= ~F_MACSRC_RND;
1122
1123 else if (strcmp(f, "MACDST_RND") == 0)
1124 pkt_dev->flags |= F_MACDST_RND;
1125
1126 else if (strcmp(f, "!MACDST_RND") == 0)
1127 pkt_dev->flags &= ~F_MACDST_RND;
1128
1129 else if (strcmp(f, "MPLS_RND") == 0)
1130 pkt_dev->flags |= F_MPLS_RND;
1131
1132 else if (strcmp(f, "!MPLS_RND") == 0)
1133 pkt_dev->flags &= ~F_MPLS_RND;
1134
1135 else if (strcmp(f, "VID_RND") == 0)
1136 pkt_dev->flags |= F_VID_RND;
1137
1138 else if (strcmp(f, "!VID_RND") == 0)
1139 pkt_dev->flags &= ~F_VID_RND;
1140
1141 else if (strcmp(f, "SVID_RND") == 0)
1142 pkt_dev->flags |= F_SVID_RND;
1143
1144 else if (strcmp(f, "!SVID_RND") == 0)
1145 pkt_dev->flags &= ~F_SVID_RND;
1146
1147 else if (strcmp(f, "FLOW_SEQ") == 0)
1148 pkt_dev->flags |= F_FLOW_SEQ;
1149
1150 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1151 pkt_dev->flags |= F_QUEUE_MAP_RND;
1152
1153 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1154 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1155
1156 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1157 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1158
1159 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1160 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1161 #ifdef CONFIG_XFRM
1162 else if (strcmp(f, "IPSEC") == 0)
1163 pkt_dev->flags |= F_IPSEC_ON;
1164 #endif
1165
1166 else if (strcmp(f, "!IPV6") == 0)
1167 pkt_dev->flags &= ~F_IPV6;
1168
1169 else {
1170 sprintf(pg_result,
1171 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1172 f,
1173 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1174 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC\n");
1175 return count;
1176 }
1177 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1178 return count;
1179 }
1180 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1181 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1182 if (len < 0)
1183 return len;
1184
1185 if (copy_from_user(buf, &user_buffer[i], len))
1186 return -EFAULT;
1187 buf[len] = 0;
1188 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1189 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1190 strncpy(pkt_dev->dst_min, buf, len);
1191 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1192 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1193 }
1194 if (debug)
1195 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1196 pkt_dev->dst_min);
1197 i += len;
1198 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1199 return count;
1200 }
1201 if (!strcmp(name, "dst_max")) {
1202 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1203 if (len < 0)
1204 return len;
1205
1206
1207 if (copy_from_user(buf, &user_buffer[i], len))
1208 return -EFAULT;
1209
1210 buf[len] = 0;
1211 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1212 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1213 strncpy(pkt_dev->dst_max, buf, len);
1214 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1215 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1216 }
1217 if (debug)
1218 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1219 pkt_dev->dst_max);
1220 i += len;
1221 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1222 return count;
1223 }
1224 if (!strcmp(name, "dst6")) {
1225 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1226 if (len < 0)
1227 return len;
1228
1229 pkt_dev->flags |= F_IPV6;
1230
1231 if (copy_from_user(buf, &user_buffer[i], len))
1232 return -EFAULT;
1233 buf[len] = 0;
1234
1235 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1236 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1237
1238 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1239
1240 if (debug)
1241 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1242
1243 i += len;
1244 sprintf(pg_result, "OK: dst6=%s", buf);
1245 return count;
1246 }
1247 if (!strcmp(name, "dst6_min")) {
1248 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1249 if (len < 0)
1250 return len;
1251
1252 pkt_dev->flags |= F_IPV6;
1253
1254 if (copy_from_user(buf, &user_buffer[i], len))
1255 return -EFAULT;
1256 buf[len] = 0;
1257
1258 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1259 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1260
1261 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1262 &pkt_dev->min_in6_daddr);
1263 if (debug)
1264 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1265
1266 i += len;
1267 sprintf(pg_result, "OK: dst6_min=%s", buf);
1268 return count;
1269 }
1270 if (!strcmp(name, "dst6_max")) {
1271 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1272 if (len < 0)
1273 return len;
1274
1275 pkt_dev->flags |= F_IPV6;
1276
1277 if (copy_from_user(buf, &user_buffer[i], len))
1278 return -EFAULT;
1279 buf[len] = 0;
1280
1281 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1282 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1283
1284 if (debug)
1285 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1286
1287 i += len;
1288 sprintf(pg_result, "OK: dst6_max=%s", buf);
1289 return count;
1290 }
1291 if (!strcmp(name, "src6")) {
1292 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1293 if (len < 0)
1294 return len;
1295
1296 pkt_dev->flags |= F_IPV6;
1297
1298 if (copy_from_user(buf, &user_buffer[i], len))
1299 return -EFAULT;
1300 buf[len] = 0;
1301
1302 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1303 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1304
1305 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1306
1307 if (debug)
1308 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1309
1310 i += len;
1311 sprintf(pg_result, "OK: src6=%s", buf);
1312 return count;
1313 }
1314 if (!strcmp(name, "src_min")) {
1315 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1316 if (len < 0)
1317 return len;
1318
1319 if (copy_from_user(buf, &user_buffer[i], len))
1320 return -EFAULT;
1321 buf[len] = 0;
1322 if (strcmp(buf, pkt_dev->src_min) != 0) {
1323 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1324 strncpy(pkt_dev->src_min, buf, len);
1325 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1326 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1327 }
1328 if (debug)
1329 printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1330 pkt_dev->src_min);
1331 i += len;
1332 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1333 return count;
1334 }
1335 if (!strcmp(name, "src_max")) {
1336 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1337 if (len < 0)
1338 return len;
1339
1340 if (copy_from_user(buf, &user_buffer[i], len))
1341 return -EFAULT;
1342 buf[len] = 0;
1343 if (strcmp(buf, pkt_dev->src_max) != 0) {
1344 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1345 strncpy(pkt_dev->src_max, buf, len);
1346 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1347 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1348 }
1349 if (debug)
1350 printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1351 pkt_dev->src_max);
1352 i += len;
1353 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1354 return count;
1355 }
1356 if (!strcmp(name, "dst_mac")) {
1357 char *v = valstr;
1358 unsigned char old_dmac[ETH_ALEN];
1359 unsigned char *m = pkt_dev->dst_mac;
1360 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1361
1362 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1363 if (len < 0)
1364 return len;
1365
1366 memset(valstr, 0, sizeof(valstr));
1367 if (copy_from_user(valstr, &user_buffer[i], len))
1368 return -EFAULT;
1369 i += len;
1370
1371 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1372 if (*v >= '0' && *v <= '9') {
1373 *m *= 16;
1374 *m += *v - '0';
1375 }
1376 if (*v >= 'A' && *v <= 'F') {
1377 *m *= 16;
1378 *m += *v - 'A' + 10;
1379 }
1380 if (*v >= 'a' && *v <= 'f') {
1381 *m *= 16;
1382 *m += *v - 'a' + 10;
1383 }
1384 if (*v == ':') {
1385 m++;
1386 *m = 0;
1387 }
1388 }
1389
1390 /* Set up Dest MAC */
1391 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1392 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1393
1394 sprintf(pg_result, "OK: dstmac");
1395 return count;
1396 }
1397 if (!strcmp(name, "src_mac")) {
1398 char *v = valstr;
1399 unsigned char old_smac[ETH_ALEN];
1400 unsigned char *m = pkt_dev->src_mac;
1401
1402 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN);
1403
1404 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1405 if (len < 0)
1406 return len;
1407
1408 memset(valstr, 0, sizeof(valstr));
1409 if (copy_from_user(valstr, &user_buffer[i], len))
1410 return -EFAULT;
1411 i += len;
1412
1413 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1414 if (*v >= '0' && *v <= '9') {
1415 *m *= 16;
1416 *m += *v - '0';
1417 }
1418 if (*v >= 'A' && *v <= 'F') {
1419 *m *= 16;
1420 *m += *v - 'A' + 10;
1421 }
1422 if (*v >= 'a' && *v <= 'f') {
1423 *m *= 16;
1424 *m += *v - 'a' + 10;
1425 }
1426 if (*v == ':') {
1427 m++;
1428 *m = 0;
1429 }
1430 }
1431
1432 /* Set up Src MAC */
1433 if (compare_ether_addr(old_smac, pkt_dev->src_mac))
1434 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN);
1435
1436 sprintf(pg_result, "OK: srcmac");
1437 return count;
1438 }
1439
1440 if (!strcmp(name, "clear_counters")) {
1441 pktgen_clear_counters(pkt_dev);
1442 sprintf(pg_result, "OK: Clearing counters.\n");
1443 return count;
1444 }
1445
1446 if (!strcmp(name, "flows")) {
1447 len = num_arg(&user_buffer[i], 10, &value);
1448 if (len < 0)
1449 return len;
1450
1451 i += len;
1452 if (value > MAX_CFLOWS)
1453 value = MAX_CFLOWS;
1454
1455 pkt_dev->cflows = value;
1456 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1457 return count;
1458 }
1459
1460 if (!strcmp(name, "flowlen")) {
1461 len = num_arg(&user_buffer[i], 10, &value);
1462 if (len < 0)
1463 return len;
1464
1465 i += len;
1466 pkt_dev->lflow = value;
1467 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1468 return count;
1469 }
1470
1471 if (!strcmp(name, "queue_map_min")) {
1472 len = num_arg(&user_buffer[i], 5, &value);
1473 if (len < 0)
1474 return len;
1475
1476 i += len;
1477 pkt_dev->queue_map_min = value;
1478 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1479 return count;
1480 }
1481
1482 if (!strcmp(name, "queue_map_max")) {
1483 len = num_arg(&user_buffer[i], 5, &value);
1484 if (len < 0)
1485 return len;
1486
1487 i += len;
1488 pkt_dev->queue_map_max = value;
1489 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1490 return count;
1491 }
1492
1493 if (!strcmp(name, "mpls")) {
1494 unsigned n, cnt;
1495
1496 len = get_labels(&user_buffer[i], pkt_dev);
1497 if (len < 0)
1498 return len;
1499 i += len;
1500 cnt = sprintf(pg_result, "OK: mpls=");
1501 for (n = 0; n < pkt_dev->nr_labels; n++)
1502 cnt += sprintf(pg_result + cnt,
1503 "%08x%s", ntohl(pkt_dev->labels[n]),
1504 n == pkt_dev->nr_labels-1 ? "" : ",");
1505
1506 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1507 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1508 pkt_dev->svlan_id = 0xffff;
1509
1510 if (debug)
1511 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1512 }
1513 return count;
1514 }
1515
1516 if (!strcmp(name, "vlan_id")) {
1517 len = num_arg(&user_buffer[i], 4, &value);
1518 if (len < 0)
1519 return len;
1520
1521 i += len;
1522 if (value <= 4095) {
1523 pkt_dev->vlan_id = value; /* turn on VLAN */
1524
1525 if (debug)
1526 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1527
1528 if (debug && pkt_dev->nr_labels)
1529 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1530
1531 pkt_dev->nr_labels = 0; /* turn off MPLS */
1532 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1533 } else {
1534 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1535 pkt_dev->svlan_id = 0xffff;
1536
1537 if (debug)
1538 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1539 }
1540 return count;
1541 }
1542
1543 if (!strcmp(name, "vlan_p")) {
1544 len = num_arg(&user_buffer[i], 1, &value);
1545 if (len < 0)
1546 return len;
1547
1548 i += len;
1549 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1550 pkt_dev->vlan_p = value;
1551 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1552 } else {
1553 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1554 }
1555 return count;
1556 }
1557
1558 if (!strcmp(name, "vlan_cfi")) {
1559 len = num_arg(&user_buffer[i], 1, &value);
1560 if (len < 0)
1561 return len;
1562
1563 i += len;
1564 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1565 pkt_dev->vlan_cfi = value;
1566 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1567 } else {
1568 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1569 }
1570 return count;
1571 }
1572
1573 if (!strcmp(name, "svlan_id")) {
1574 len = num_arg(&user_buffer[i], 4, &value);
1575 if (len < 0)
1576 return len;
1577
1578 i += len;
1579 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1580 pkt_dev->svlan_id = value; /* turn on SVLAN */
1581
1582 if (debug)
1583 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1584
1585 if (debug && pkt_dev->nr_labels)
1586 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1587
1588 pkt_dev->nr_labels = 0; /* turn off MPLS */
1589 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1590 } else {
1591 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1592 pkt_dev->svlan_id = 0xffff;
1593
1594 if (debug)
1595 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1596 }
1597 return count;
1598 }
1599
1600 if (!strcmp(name, "svlan_p")) {
1601 len = num_arg(&user_buffer[i], 1, &value);
1602 if (len < 0)
1603 return len;
1604
1605 i += len;
1606 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1607 pkt_dev->svlan_p = value;
1608 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1609 } else {
1610 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1611 }
1612 return count;
1613 }
1614
1615 if (!strcmp(name, "svlan_cfi")) {
1616 len = num_arg(&user_buffer[i], 1, &value);
1617 if (len < 0)
1618 return len;
1619
1620 i += len;
1621 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1622 pkt_dev->svlan_cfi = value;
1623 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1624 } else {
1625 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1626 }
1627 return count;
1628 }
1629
1630 if (!strcmp(name, "tos")) {
1631 __u32 tmp_value = 0;
1632 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1633 if (len < 0)
1634 return len;
1635
1636 i += len;
1637 if (len == 2) {
1638 pkt_dev->tos = tmp_value;
1639 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1640 } else {
1641 sprintf(pg_result, "ERROR: tos must be 00-ff");
1642 }
1643 return count;
1644 }
1645
1646 if (!strcmp(name, "traffic_class")) {
1647 __u32 tmp_value = 0;
1648 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1649 if (len < 0)
1650 return len;
1651
1652 i += len;
1653 if (len == 2) {
1654 pkt_dev->traffic_class = tmp_value;
1655 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1656 } else {
1657 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1658 }
1659 return count;
1660 }
1661
1662 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1663 return -EINVAL;
1664 }
1665
1666 static int pktgen_if_open(struct inode *inode, struct file *file)
1667 {
1668 return single_open(file, pktgen_if_show, PDE(inode)->data);
1669 }
1670
1671 static const struct file_operations pktgen_if_fops = {
1672 .owner = THIS_MODULE,
1673 .open = pktgen_if_open,
1674 .read = seq_read,
1675 .llseek = seq_lseek,
1676 .write = pktgen_if_write,
1677 .release = single_release,
1678 };
1679
1680 static int pktgen_thread_show(struct seq_file *seq, void *v)
1681 {
1682 struct pktgen_thread *t = seq->private;
1683 const struct pktgen_dev *pkt_dev;
1684
1685 BUG_ON(!t);
1686
1687 seq_printf(seq, "Running: ");
1688
1689 if_lock(t);
1690 list_for_each_entry(pkt_dev, &t->if_list, list)
1691 if (pkt_dev->running)
1692 seq_printf(seq, "%s ", pkt_dev->odevname);
1693
1694 seq_printf(seq, "\nStopped: ");
1695
1696 list_for_each_entry(pkt_dev, &t->if_list, list)
1697 if (!pkt_dev->running)
1698 seq_printf(seq, "%s ", pkt_dev->odevname);
1699
1700 if (t->result[0])
1701 seq_printf(seq, "\nResult: %s\n", t->result);
1702 else
1703 seq_printf(seq, "\nResult: NA\n");
1704
1705 if_unlock(t);
1706
1707 return 0;
1708 }
1709
1710 static ssize_t pktgen_thread_write(struct file *file,
1711 const char __user * user_buffer,
1712 size_t count, loff_t * offset)
1713 {
1714 struct seq_file *seq = (struct seq_file *)file->private_data;
1715 struct pktgen_thread *t = seq->private;
1716 int i = 0, max, len, ret;
1717 char name[40];
1718 char *pg_result;
1719
1720 if (count < 1) {
1721 // sprintf(pg_result, "Wrong command format");
1722 return -EINVAL;
1723 }
1724
1725 max = count - i;
1726 len = count_trail_chars(&user_buffer[i], max);
1727 if (len < 0)
1728 return len;
1729
1730 i += len;
1731
1732 /* Read variable name */
1733
1734 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1735 if (len < 0)
1736 return len;
1737
1738 memset(name, 0, sizeof(name));
1739 if (copy_from_user(name, &user_buffer[i], len))
1740 return -EFAULT;
1741 i += len;
1742
1743 max = count - i;
1744 len = count_trail_chars(&user_buffer[i], max);
1745 if (len < 0)
1746 return len;
1747
1748 i += len;
1749
1750 if (debug)
1751 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1752 name, (unsigned long)count);
1753
1754 if (!t) {
1755 printk(KERN_ERR "pktgen: ERROR: No thread\n");
1756 ret = -EINVAL;
1757 goto out;
1758 }
1759
1760 pg_result = &(t->result[0]);
1761
1762 if (!strcmp(name, "add_device")) {
1763 char f[32];
1764 memset(f, 0, 32);
1765 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1766 if (len < 0) {
1767 ret = len;
1768 goto out;
1769 }
1770 if (copy_from_user(f, &user_buffer[i], len))
1771 return -EFAULT;
1772 i += len;
1773 mutex_lock(&pktgen_thread_lock);
1774 pktgen_add_device(t, f);
1775 mutex_unlock(&pktgen_thread_lock);
1776 ret = count;
1777 sprintf(pg_result, "OK: add_device=%s", f);
1778 goto out;
1779 }
1780
1781 if (!strcmp(name, "rem_device_all")) {
1782 mutex_lock(&pktgen_thread_lock);
1783 t->control |= T_REMDEVALL;
1784 mutex_unlock(&pktgen_thread_lock);
1785 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1786 ret = count;
1787 sprintf(pg_result, "OK: rem_device_all");
1788 goto out;
1789 }
1790
1791 if (!strcmp(name, "max_before_softirq")) {
1792 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1793 ret = count;
1794 goto out;
1795 }
1796
1797 ret = -EINVAL;
1798 out:
1799 return ret;
1800 }
1801
1802 static int pktgen_thread_open(struct inode *inode, struct file *file)
1803 {
1804 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1805 }
1806
1807 static const struct file_operations pktgen_thread_fops = {
1808 .owner = THIS_MODULE,
1809 .open = pktgen_thread_open,
1810 .read = seq_read,
1811 .llseek = seq_lseek,
1812 .write = pktgen_thread_write,
1813 .release = single_release,
1814 };
1815
1816 /* Think find or remove for NN */
1817 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1818 {
1819 struct pktgen_thread *t;
1820 struct pktgen_dev *pkt_dev = NULL;
1821 bool exact = (remove == FIND);
1822
1823 list_for_each_entry(t, &pktgen_threads, th_list) {
1824 pkt_dev = pktgen_find_dev(t, ifname, exact);
1825 if (pkt_dev) {
1826 if (remove) {
1827 if_lock(t);
1828 pkt_dev->removal_mark = 1;
1829 t->control |= T_REMDEV;
1830 if_unlock(t);
1831 }
1832 break;
1833 }
1834 }
1835 return pkt_dev;
1836 }
1837
1838 /*
1839 * mark a device for removal
1840 */
1841 static void pktgen_mark_device(const char *ifname)
1842 {
1843 struct pktgen_dev *pkt_dev = NULL;
1844 const int max_tries = 10, msec_per_try = 125;
1845 int i = 0;
1846
1847 mutex_lock(&pktgen_thread_lock);
1848 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname);
1849
1850 while (1) {
1851
1852 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1853 if (pkt_dev == NULL)
1854 break; /* success */
1855
1856 mutex_unlock(&pktgen_thread_lock);
1857 pr_debug("pktgen: pktgen_mark_device waiting for %s "
1858 "to disappear....\n", ifname);
1859 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1860 mutex_lock(&pktgen_thread_lock);
1861
1862 if (++i >= max_tries) {
1863 printk(KERN_ERR "pktgen_mark_device: timed out after "
1864 "waiting %d msec for device %s to be removed\n",
1865 msec_per_try * i, ifname);
1866 break;
1867 }
1868
1869 }
1870
1871 mutex_unlock(&pktgen_thread_lock);
1872 }
1873
1874 static void pktgen_change_name(struct net_device *dev)
1875 {
1876 struct pktgen_thread *t;
1877
1878 list_for_each_entry(t, &pktgen_threads, th_list) {
1879 struct pktgen_dev *pkt_dev;
1880
1881 list_for_each_entry(pkt_dev, &t->if_list, list) {
1882 if (pkt_dev->odev != dev)
1883 continue;
1884
1885 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1886
1887 pkt_dev->entry = proc_create_data(dev->name, 0600,
1888 pg_proc_dir,
1889 &pktgen_if_fops,
1890 pkt_dev);
1891 if (!pkt_dev->entry)
1892 printk(KERN_ERR "pktgen: can't move proc "
1893 " entry for '%s'\n", dev->name);
1894 break;
1895 }
1896 }
1897 }
1898
1899 static int pktgen_device_event(struct notifier_block *unused,
1900 unsigned long event, void *ptr)
1901 {
1902 struct net_device *dev = ptr;
1903
1904 if (!net_eq(dev_net(dev), &init_net))
1905 return NOTIFY_DONE;
1906
1907 /* It is OK that we do not hold the group lock right now,
1908 * as we run under the RTNL lock.
1909 */
1910
1911 switch (event) {
1912 case NETDEV_CHANGENAME:
1913 pktgen_change_name(dev);
1914 break;
1915
1916 case NETDEV_UNREGISTER:
1917 pktgen_mark_device(dev->name);
1918 break;
1919 }
1920
1921 return NOTIFY_DONE;
1922 }
1923
1924 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev,
1925 const char *ifname)
1926 {
1927 char b[IFNAMSIZ+5];
1928 int i = 0;
1929
1930 for (i = 0; ifname[i] != '@'; i++) {
1931 if (i == IFNAMSIZ)
1932 break;
1933
1934 b[i] = ifname[i];
1935 }
1936 b[i] = 0;
1937
1938 return dev_get_by_name(&init_net, b);
1939 }
1940
1941
1942 /* Associate pktgen_dev with a device. */
1943
1944 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1945 {
1946 struct net_device *odev;
1947 int err;
1948
1949 /* Clean old setups */
1950 if (pkt_dev->odev) {
1951 dev_put(pkt_dev->odev);
1952 pkt_dev->odev = NULL;
1953 }
1954
1955 odev = pktgen_dev_get_by_name(pkt_dev, ifname);
1956 if (!odev) {
1957 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname);
1958 return -ENODEV;
1959 }
1960
1961 if (odev->type != ARPHRD_ETHER) {
1962 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname);
1963 err = -EINVAL;
1964 } else if (!netif_running(odev)) {
1965 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname);
1966 err = -ENETDOWN;
1967 } else {
1968 pkt_dev->odev = odev;
1969 return 0;
1970 }
1971
1972 dev_put(odev);
1973 return err;
1974 }
1975
1976 /* Read pkt_dev from the interface and set up internal pktgen_dev
1977 * structure to have the right information to create/send packets
1978 */
1979 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
1980 {
1981 int ntxq;
1982
1983 if (!pkt_dev->odev) {
1984 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in "
1985 "setup_inject.\n");
1986 sprintf(pkt_dev->result,
1987 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1988 return;
1989 }
1990
1991 /* make sure that we don't pick a non-existing transmit queue */
1992 ntxq = pkt_dev->odev->real_num_tx_queues;
1993
1994 if (ntxq <= pkt_dev->queue_map_min) {
1995 printk(KERN_WARNING "pktgen: WARNING: Requested "
1996 "queue_map_min (zero-based) (%d) exceeds valid range "
1997 "[0 - %d] for (%d) queues on %s, resetting\n",
1998 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
1999 pkt_dev->odevname);
2000 pkt_dev->queue_map_min = ntxq - 1;
2001 }
2002 if (pkt_dev->queue_map_max >= ntxq) {
2003 printk(KERN_WARNING "pktgen: WARNING: Requested "
2004 "queue_map_max (zero-based) (%d) exceeds valid range "
2005 "[0 - %d] for (%d) queues on %s, resetting\n",
2006 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2007 pkt_dev->odevname);
2008 pkt_dev->queue_map_max = ntxq - 1;
2009 }
2010
2011 /* Default to the interface's mac if not explicitly set. */
2012
2013 if (is_zero_ether_addr(pkt_dev->src_mac))
2014 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2015
2016 /* Set up Dest MAC */
2017 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2018
2019 /* Set up pkt size */
2020 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2021
2022 if (pkt_dev->flags & F_IPV6) {
2023 /*
2024 * Skip this automatic address setting until locks or functions
2025 * gets exported
2026 */
2027
2028 #ifdef NOTNOW
2029 int i, set = 0, err = 1;
2030 struct inet6_dev *idev;
2031
2032 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2033 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2034 set = 1;
2035 break;
2036 }
2037
2038 if (!set) {
2039
2040 /*
2041 * Use linklevel address if unconfigured.
2042 *
2043 * use ipv6_get_lladdr if/when it's get exported
2044 */
2045
2046 rcu_read_lock();
2047 idev = __in6_dev_get(pkt_dev->odev);
2048 if (idev) {
2049 struct inet6_ifaddr *ifp;
2050
2051 read_lock_bh(&idev->lock);
2052 for (ifp = idev->addr_list; ifp;
2053 ifp = ifp->if_next) {
2054 if (ifp->scope == IFA_LINK
2055 && !(ifp->
2056 flags & IFA_F_TENTATIVE)) {
2057 ipv6_addr_copy(&pkt_dev->
2058 cur_in6_saddr,
2059 &ifp->addr);
2060 err = 0;
2061 break;
2062 }
2063 }
2064 read_unlock_bh(&idev->lock);
2065 }
2066 rcu_read_unlock();
2067 if (err)
2068 printk(KERN_ERR "pktgen: ERROR: IPv6 link "
2069 "address not availble.\n");
2070 }
2071 #endif
2072 } else {
2073 pkt_dev->saddr_min = 0;
2074 pkt_dev->saddr_max = 0;
2075 if (strlen(pkt_dev->src_min) == 0) {
2076
2077 struct in_device *in_dev;
2078
2079 rcu_read_lock();
2080 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2081 if (in_dev) {
2082 if (in_dev->ifa_list) {
2083 pkt_dev->saddr_min =
2084 in_dev->ifa_list->ifa_address;
2085 pkt_dev->saddr_max = pkt_dev->saddr_min;
2086 }
2087 }
2088 rcu_read_unlock();
2089 } else {
2090 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2091 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2092 }
2093
2094 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2095 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2096 }
2097 /* Initialize current values. */
2098 pkt_dev->cur_dst_mac_offset = 0;
2099 pkt_dev->cur_src_mac_offset = 0;
2100 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2101 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2102 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2103 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2104 pkt_dev->nflows = 0;
2105 }
2106
2107
2108 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2109 {
2110 ktime_t start_time, end_time;
2111 s64 remaining;
2112 struct hrtimer_sleeper t;
2113
2114 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2115 hrtimer_set_expires(&t.timer, spin_until);
2116
2117 remaining = ktime_to_us(hrtimer_expires_remaining(&t.timer));
2118 if (remaining <= 0) {
2119 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2120 return;
2121 }
2122
2123 start_time = ktime_now();
2124 if (remaining < 100)
2125 udelay(remaining); /* really small just spin */
2126 else {
2127 /* see do_nanosleep */
2128 hrtimer_init_sleeper(&t, current);
2129 do {
2130 set_current_state(TASK_INTERRUPTIBLE);
2131 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2132 if (!hrtimer_active(&t.timer))
2133 t.task = NULL;
2134
2135 if (likely(t.task))
2136 schedule();
2137
2138 hrtimer_cancel(&t.timer);
2139 } while (t.task && pkt_dev->running && !signal_pending(current));
2140 __set_current_state(TASK_RUNNING);
2141 }
2142 end_time = ktime_now();
2143
2144 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2145 pkt_dev->next_tx = ktime_add_ns(end_time, pkt_dev->delay);
2146 }
2147
2148 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2149 {
2150 pkt_dev->pkt_overhead = 0;
2151 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2152 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2153 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2154 }
2155
2156 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2157 {
2158 return !!(pkt_dev->flows[flow].flags & F_INIT);
2159 }
2160
2161 static inline int f_pick(struct pktgen_dev *pkt_dev)
2162 {
2163 int flow = pkt_dev->curfl;
2164
2165 if (pkt_dev->flags & F_FLOW_SEQ) {
2166 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2167 /* reset time */
2168 pkt_dev->flows[flow].count = 0;
2169 pkt_dev->flows[flow].flags = 0;
2170 pkt_dev->curfl += 1;
2171 if (pkt_dev->curfl >= pkt_dev->cflows)
2172 pkt_dev->curfl = 0; /*reset */
2173 }
2174 } else {
2175 flow = random32() % pkt_dev->cflows;
2176 pkt_dev->curfl = flow;
2177
2178 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2179 pkt_dev->flows[flow].count = 0;
2180 pkt_dev->flows[flow].flags = 0;
2181 }
2182 }
2183
2184 return pkt_dev->curfl;
2185 }
2186
2187
2188 #ifdef CONFIG_XFRM
2189 /* If there was already an IPSEC SA, we keep it as is, else
2190 * we go look for it ...
2191 */
2192 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2193 {
2194 struct xfrm_state *x = pkt_dev->flows[flow].x;
2195 if (!x) {
2196 /*slow path: we dont already have xfrm_state*/
2197 x = xfrm_stateonly_find(&init_net,
2198 (xfrm_address_t *)&pkt_dev->cur_daddr,
2199 (xfrm_address_t *)&pkt_dev->cur_saddr,
2200 AF_INET,
2201 pkt_dev->ipsmode,
2202 pkt_dev->ipsproto, 0);
2203 if (x) {
2204 pkt_dev->flows[flow].x = x;
2205 set_pkt_overhead(pkt_dev);
2206 pkt_dev->pkt_overhead += x->props.header_len;
2207 }
2208
2209 }
2210 }
2211 #endif
2212 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2213 {
2214
2215 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2216 pkt_dev->cur_queue_map = smp_processor_id();
2217
2218 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2219 __u16 t;
2220 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2221 t = random32() %
2222 (pkt_dev->queue_map_max -
2223 pkt_dev->queue_map_min + 1)
2224 + pkt_dev->queue_map_min;
2225 } else {
2226 t = pkt_dev->cur_queue_map + 1;
2227 if (t > pkt_dev->queue_map_max)
2228 t = pkt_dev->queue_map_min;
2229 }
2230 pkt_dev->cur_queue_map = t;
2231 }
2232 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2233 }
2234
2235 /* Increment/randomize headers according to flags and current values
2236 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2237 */
2238 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2239 {
2240 __u32 imn;
2241 __u32 imx;
2242 int flow = 0;
2243
2244 if (pkt_dev->cflows)
2245 flow = f_pick(pkt_dev);
2246
2247 /* Deal with source MAC */
2248 if (pkt_dev->src_mac_count > 1) {
2249 __u32 mc;
2250 __u32 tmp;
2251
2252 if (pkt_dev->flags & F_MACSRC_RND)
2253 mc = random32() % pkt_dev->src_mac_count;
2254 else {
2255 mc = pkt_dev->cur_src_mac_offset++;
2256 if (pkt_dev->cur_src_mac_offset >=
2257 pkt_dev->src_mac_count)
2258 pkt_dev->cur_src_mac_offset = 0;
2259 }
2260
2261 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2262 pkt_dev->hh[11] = tmp;
2263 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2264 pkt_dev->hh[10] = tmp;
2265 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2266 pkt_dev->hh[9] = tmp;
2267 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2268 pkt_dev->hh[8] = tmp;
2269 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2270 pkt_dev->hh[7] = tmp;
2271 }
2272
2273 /* Deal with Destination MAC */
2274 if (pkt_dev->dst_mac_count > 1) {
2275 __u32 mc;
2276 __u32 tmp;
2277
2278 if (pkt_dev->flags & F_MACDST_RND)
2279 mc = random32() % pkt_dev->dst_mac_count;
2280
2281 else {
2282 mc = pkt_dev->cur_dst_mac_offset++;
2283 if (pkt_dev->cur_dst_mac_offset >=
2284 pkt_dev->dst_mac_count) {
2285 pkt_dev->cur_dst_mac_offset = 0;
2286 }
2287 }
2288
2289 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2290 pkt_dev->hh[5] = tmp;
2291 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2292 pkt_dev->hh[4] = tmp;
2293 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2294 pkt_dev->hh[3] = tmp;
2295 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2296 pkt_dev->hh[2] = tmp;
2297 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2298 pkt_dev->hh[1] = tmp;
2299 }
2300
2301 if (pkt_dev->flags & F_MPLS_RND) {
2302 unsigned i;
2303 for (i = 0; i < pkt_dev->nr_labels; i++)
2304 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2305 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2306 ((__force __be32)random32() &
2307 htonl(0x000fffff));
2308 }
2309
2310 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2311 pkt_dev->vlan_id = random32() & (4096-1);
2312 }
2313
2314 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2315 pkt_dev->svlan_id = random32() & (4096 - 1);
2316 }
2317
2318 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2319 if (pkt_dev->flags & F_UDPSRC_RND)
2320 pkt_dev->cur_udp_src = random32() %
2321 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2322 + pkt_dev->udp_src_min;
2323
2324 else {
2325 pkt_dev->cur_udp_src++;
2326 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2327 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2328 }
2329 }
2330
2331 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2332 if (pkt_dev->flags & F_UDPDST_RND) {
2333 pkt_dev->cur_udp_dst = random32() %
2334 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2335 + pkt_dev->udp_dst_min;
2336 } else {
2337 pkt_dev->cur_udp_dst++;
2338 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2339 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2340 }
2341 }
2342
2343 if (!(pkt_dev->flags & F_IPV6)) {
2344
2345 imn = ntohl(pkt_dev->saddr_min);
2346 imx = ntohl(pkt_dev->saddr_max);
2347 if (imn < imx) {
2348 __u32 t;
2349 if (pkt_dev->flags & F_IPSRC_RND)
2350 t = random32() % (imx - imn) + imn;
2351 else {
2352 t = ntohl(pkt_dev->cur_saddr);
2353 t++;
2354 if (t > imx)
2355 t = imn;
2356
2357 }
2358 pkt_dev->cur_saddr = htonl(t);
2359 }
2360
2361 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2362 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2363 } else {
2364 imn = ntohl(pkt_dev->daddr_min);
2365 imx = ntohl(pkt_dev->daddr_max);
2366 if (imn < imx) {
2367 __u32 t;
2368 __be32 s;
2369 if (pkt_dev->flags & F_IPDST_RND) {
2370
2371 t = random32() % (imx - imn) + imn;
2372 s = htonl(t);
2373
2374 while (ipv4_is_loopback(s) ||
2375 ipv4_is_multicast(s) ||
2376 ipv4_is_lbcast(s) ||
2377 ipv4_is_zeronet(s) ||
2378 ipv4_is_local_multicast(s)) {
2379 t = random32() % (imx - imn) + imn;
2380 s = htonl(t);
2381 }
2382 pkt_dev->cur_daddr = s;
2383 } else {
2384 t = ntohl(pkt_dev->cur_daddr);
2385 t++;
2386 if (t > imx) {
2387 t = imn;
2388 }
2389 pkt_dev->cur_daddr = htonl(t);
2390 }
2391 }
2392 if (pkt_dev->cflows) {
2393 pkt_dev->flows[flow].flags |= F_INIT;
2394 pkt_dev->flows[flow].cur_daddr =
2395 pkt_dev->cur_daddr;
2396 #ifdef CONFIG_XFRM
2397 if (pkt_dev->flags & F_IPSEC_ON)
2398 get_ipsec_sa(pkt_dev, flow);
2399 #endif
2400 pkt_dev->nflows++;
2401 }
2402 }
2403 } else { /* IPV6 * */
2404
2405 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2406 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2407 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2408 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2409 else {
2410 int i;
2411
2412 /* Only random destinations yet */
2413
2414 for (i = 0; i < 4; i++) {
2415 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2416 (((__force __be32)random32() |
2417 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2418 pkt_dev->max_in6_daddr.s6_addr32[i]);
2419 }
2420 }
2421 }
2422
2423 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2424 __u32 t;
2425 if (pkt_dev->flags & F_TXSIZE_RND) {
2426 t = random32() %
2427 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2428 + pkt_dev->min_pkt_size;
2429 } else {
2430 t = pkt_dev->cur_pkt_size + 1;
2431 if (t > pkt_dev->max_pkt_size)
2432 t = pkt_dev->min_pkt_size;
2433 }
2434 pkt_dev->cur_pkt_size = t;
2435 }
2436
2437 set_cur_queue_map(pkt_dev);
2438
2439 pkt_dev->flows[flow].count++;
2440 }
2441
2442
2443 #ifdef CONFIG_XFRM
2444 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2445 {
2446 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2447 int err = 0;
2448 struct iphdr *iph;
2449
2450 if (!x)
2451 return 0;
2452 /* XXX: we dont support tunnel mode for now until
2453 * we resolve the dst issue */
2454 if (x->props.mode != XFRM_MODE_TRANSPORT)
2455 return 0;
2456
2457 spin_lock(&x->lock);
2458 iph = ip_hdr(skb);
2459
2460 err = x->outer_mode->output(x, skb);
2461 if (err)
2462 goto error;
2463 err = x->type->output(x, skb);
2464 if (err)
2465 goto error;
2466
2467 x->curlft.bytes += skb->len;
2468 x->curlft.packets++;
2469 error:
2470 spin_unlock(&x->lock);
2471 return err;
2472 }
2473
2474 static void free_SAs(struct pktgen_dev *pkt_dev)
2475 {
2476 if (pkt_dev->cflows) {
2477 /* let go of the SAs if we have them */
2478 int i = 0;
2479 for (; i < pkt_dev->cflows; i++) {
2480 struct xfrm_state *x = pkt_dev->flows[i].x;
2481 if (x) {
2482 xfrm_state_put(x);
2483 pkt_dev->flows[i].x = NULL;
2484 }
2485 }
2486 }
2487 }
2488
2489 static int process_ipsec(struct pktgen_dev *pkt_dev,
2490 struct sk_buff *skb, __be16 protocol)
2491 {
2492 if (pkt_dev->flags & F_IPSEC_ON) {
2493 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2494 int nhead = 0;
2495 if (x) {
2496 int ret;
2497 __u8 *eth;
2498 nhead = x->props.header_len - skb_headroom(skb);
2499 if (nhead > 0) {
2500 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2501 if (ret < 0) {
2502 printk(KERN_ERR "Error expanding "
2503 "ipsec packet %d\n", ret);
2504 goto err;
2505 }
2506 }
2507
2508 /* ipsec is not expecting ll header */
2509 skb_pull(skb, ETH_HLEN);
2510 ret = pktgen_output_ipsec(skb, pkt_dev);
2511 if (ret) {
2512 printk(KERN_ERR "Error creating ipsec "
2513 "packet %d\n", ret);
2514 goto err;
2515 }
2516 /* restore ll */
2517 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2518 memcpy(eth, pkt_dev->hh, 12);
2519 *(u16 *) &eth[12] = protocol;
2520 }
2521 }
2522 return 1;
2523 err:
2524 kfree_skb(skb);
2525 return 0;
2526 }
2527 #endif
2528
2529 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2530 {
2531 unsigned i;
2532 for (i = 0; i < pkt_dev->nr_labels; i++)
2533 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2534
2535 mpls--;
2536 *mpls |= MPLS_STACK_BOTTOM;
2537 }
2538
2539 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2540 unsigned int prio)
2541 {
2542 return htons(id | (cfi << 12) | (prio << 13));
2543 }
2544
2545 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2546 struct pktgen_dev *pkt_dev)
2547 {
2548 struct sk_buff *skb = NULL;
2549 __u8 *eth;
2550 struct udphdr *udph;
2551 int datalen, iplen;
2552 struct iphdr *iph;
2553 struct pktgen_hdr *pgh = NULL;
2554 __be16 protocol = htons(ETH_P_IP);
2555 __be32 *mpls;
2556 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2557 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2558 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2559 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2560 u16 queue_map;
2561
2562 if (pkt_dev->nr_labels)
2563 protocol = htons(ETH_P_MPLS_UC);
2564
2565 if (pkt_dev->vlan_id != 0xffff)
2566 protocol = htons(ETH_P_8021Q);
2567
2568 /* Update any of the values, used when we're incrementing various
2569 * fields.
2570 */
2571 queue_map = pkt_dev->cur_queue_map;
2572 mod_cur_headers(pkt_dev);
2573
2574 datalen = (odev->hard_header_len + 16) & ~0xf;
2575 skb = __netdev_alloc_skb(odev,
2576 pkt_dev->cur_pkt_size + 64
2577 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2578 if (!skb) {
2579 sprintf(pkt_dev->result, "No memory");
2580 return NULL;
2581 }
2582
2583 skb_reserve(skb, datalen);
2584
2585 /* Reserve for ethernet and IP header */
2586 eth = (__u8 *) skb_push(skb, 14);
2587 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2588 if (pkt_dev->nr_labels)
2589 mpls_push(mpls, pkt_dev);
2590
2591 if (pkt_dev->vlan_id != 0xffff) {
2592 if (pkt_dev->svlan_id != 0xffff) {
2593 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2594 *svlan_tci = build_tci(pkt_dev->svlan_id,
2595 pkt_dev->svlan_cfi,
2596 pkt_dev->svlan_p);
2597 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2598 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2599 }
2600 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2601 *vlan_tci = build_tci(pkt_dev->vlan_id,
2602 pkt_dev->vlan_cfi,
2603 pkt_dev->vlan_p);
2604 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2605 *vlan_encapsulated_proto = htons(ETH_P_IP);
2606 }
2607
2608 skb->network_header = skb->tail;
2609 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2610 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2611 skb_set_queue_mapping(skb, queue_map);
2612 iph = ip_hdr(skb);
2613 udph = udp_hdr(skb);
2614
2615 memcpy(eth, pkt_dev->hh, 12);
2616 *(__be16 *) & eth[12] = protocol;
2617
2618 /* Eth + IPh + UDPh + mpls */
2619 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2620 pkt_dev->pkt_overhead;
2621 if (datalen < sizeof(struct pktgen_hdr))
2622 datalen = sizeof(struct pktgen_hdr);
2623
2624 udph->source = htons(pkt_dev->cur_udp_src);
2625 udph->dest = htons(pkt_dev->cur_udp_dst);
2626 udph->len = htons(datalen + 8); /* DATA + udphdr */
2627 udph->check = 0; /* No checksum */
2628
2629 iph->ihl = 5;
2630 iph->version = 4;
2631 iph->ttl = 32;
2632 iph->tos = pkt_dev->tos;
2633 iph->protocol = IPPROTO_UDP; /* UDP */
2634 iph->saddr = pkt_dev->cur_saddr;
2635 iph->daddr = pkt_dev->cur_daddr;
2636 iph->id = htons(pkt_dev->ip_id);
2637 pkt_dev->ip_id++;
2638 iph->frag_off = 0;
2639 iplen = 20 + 8 + datalen;
2640 iph->tot_len = htons(iplen);
2641 iph->check = 0;
2642 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2643 skb->protocol = protocol;
2644 skb->mac_header = (skb->network_header - ETH_HLEN -
2645 pkt_dev->pkt_overhead);
2646 skb->dev = odev;
2647 skb->pkt_type = PACKET_HOST;
2648
2649 if (pkt_dev->nfrags <= 0) {
2650 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2651 memset(pgh + 1, 0, datalen - sizeof(struct pktgen_hdr));
2652 } else {
2653 int frags = pkt_dev->nfrags;
2654 int i, len;
2655
2656 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2657
2658 if (frags > MAX_SKB_FRAGS)
2659 frags = MAX_SKB_FRAGS;
2660 if (datalen > frags * PAGE_SIZE) {
2661 len = datalen - frags * PAGE_SIZE;
2662 memset(skb_put(skb, len), 0, len);
2663 datalen = frags * PAGE_SIZE;
2664 }
2665
2666 i = 0;
2667 while (datalen > 0) {
2668 struct page *page = alloc_pages(GFP_KERNEL | __GFP_ZERO, 0);
2669 skb_shinfo(skb)->frags[i].page = page;
2670 skb_shinfo(skb)->frags[i].page_offset = 0;
2671 skb_shinfo(skb)->frags[i].size =
2672 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2673 datalen -= skb_shinfo(skb)->frags[i].size;
2674 skb->len += skb_shinfo(skb)->frags[i].size;
2675 skb->data_len += skb_shinfo(skb)->frags[i].size;
2676 i++;
2677 skb_shinfo(skb)->nr_frags = i;
2678 }
2679
2680 while (i < frags) {
2681 int rem;
2682
2683 if (i == 0)
2684 break;
2685
2686 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2687 if (rem == 0)
2688 break;
2689
2690 skb_shinfo(skb)->frags[i - 1].size -= rem;
2691
2692 skb_shinfo(skb)->frags[i] =
2693 skb_shinfo(skb)->frags[i - 1];
2694 get_page(skb_shinfo(skb)->frags[i].page);
2695 skb_shinfo(skb)->frags[i].page =
2696 skb_shinfo(skb)->frags[i - 1].page;
2697 skb_shinfo(skb)->frags[i].page_offset +=
2698 skb_shinfo(skb)->frags[i - 1].size;
2699 skb_shinfo(skb)->frags[i].size = rem;
2700 i++;
2701 skb_shinfo(skb)->nr_frags = i;
2702 }
2703 }
2704
2705 /* Stamp the time, and sequence number,
2706 * convert them to network byte order
2707 */
2708 if (pgh) {
2709 struct timeval timestamp;
2710
2711 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2712 pgh->seq_num = htonl(pkt_dev->seq_num);
2713
2714 do_gettimeofday(&timestamp);
2715 pgh->tv_sec = htonl(timestamp.tv_sec);
2716 pgh->tv_usec = htonl(timestamp.tv_usec);
2717 }
2718
2719 #ifdef CONFIG_XFRM
2720 if (!process_ipsec(pkt_dev, skb, protocol))
2721 return NULL;
2722 #endif
2723
2724 return skb;
2725 }
2726
2727 /*
2728 * scan_ip6, fmt_ip taken from dietlibc-0.21
2729 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2730 *
2731 * Slightly modified for kernel.
2732 * Should be candidate for net/ipv4/utils.c
2733 * --ro
2734 */
2735
2736 static unsigned int scan_ip6(const char *s, char ip[16])
2737 {
2738 unsigned int i;
2739 unsigned int len = 0;
2740 unsigned long u;
2741 char suffix[16];
2742 unsigned int prefixlen = 0;
2743 unsigned int suffixlen = 0;
2744 __be32 tmp;
2745 char *pos;
2746
2747 for (i = 0; i < 16; i++)
2748 ip[i] = 0;
2749
2750 for (;;) {
2751 if (*s == ':') {
2752 len++;
2753 if (s[1] == ':') { /* Found "::", skip to part 2 */
2754 s += 2;
2755 len++;
2756 break;
2757 }
2758 s++;
2759 }
2760
2761 u = simple_strtoul(s, &pos, 16);
2762 i = pos - s;
2763 if (!i)
2764 return 0;
2765 if (prefixlen == 12 && s[i] == '.') {
2766
2767 /* the last 4 bytes may be written as IPv4 address */
2768
2769 tmp = in_aton(s);
2770 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2771 return i + len;
2772 }
2773 ip[prefixlen++] = (u >> 8);
2774 ip[prefixlen++] = (u & 255);
2775 s += i;
2776 len += i;
2777 if (prefixlen == 16)
2778 return len;
2779 }
2780
2781 /* part 2, after "::" */
2782 for (;;) {
2783 if (*s == ':') {
2784 if (suffixlen == 0)
2785 break;
2786 s++;
2787 len++;
2788 } else if (suffixlen != 0)
2789 break;
2790
2791 u = simple_strtol(s, &pos, 16);
2792 i = pos - s;
2793 if (!i) {
2794 if (*s)
2795 len--;
2796 break;
2797 }
2798 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2799 tmp = in_aton(s);
2800 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2801 sizeof(tmp));
2802 suffixlen += 4;
2803 len += strlen(s);
2804 break;
2805 }
2806 suffix[suffixlen++] = (u >> 8);
2807 suffix[suffixlen++] = (u & 255);
2808 s += i;
2809 len += i;
2810 if (prefixlen + suffixlen == 16)
2811 break;
2812 }
2813 for (i = 0; i < suffixlen; i++)
2814 ip[16 - suffixlen + i] = suffix[i];
2815 return len;
2816 }
2817
2818 static char tohex(char hexdigit)
2819 {
2820 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2821 }
2822
2823 static int fmt_xlong(char *s, unsigned int i)
2824 {
2825 char *bak = s;
2826 *s = tohex((i >> 12) & 0xf);
2827 if (s != bak || *s != '0')
2828 ++s;
2829 *s = tohex((i >> 8) & 0xf);
2830 if (s != bak || *s != '0')
2831 ++s;
2832 *s = tohex((i >> 4) & 0xf);
2833 if (s != bak || *s != '0')
2834 ++s;
2835 *s = tohex(i & 0xf);
2836 return s - bak + 1;
2837 }
2838
2839 static unsigned int fmt_ip6(char *s, const char ip[16])
2840 {
2841 unsigned int len;
2842 unsigned int i;
2843 unsigned int temp;
2844 unsigned int compressing;
2845 int j;
2846
2847 len = 0;
2848 compressing = 0;
2849 for (j = 0; j < 16; j += 2) {
2850
2851 #ifdef V4MAPPEDPREFIX
2852 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2853 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2854 temp = strlen(s);
2855 return len + temp;
2856 }
2857 #endif
2858 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2859 (unsigned long)(unsigned char)ip[j + 1];
2860 if (temp == 0) {
2861 if (!compressing) {
2862 compressing = 1;
2863 if (j == 0) {
2864 *s++ = ':';
2865 ++len;
2866 }
2867 }
2868 } else {
2869 if (compressing) {
2870 compressing = 0;
2871 *s++ = ':';
2872 ++len;
2873 }
2874 i = fmt_xlong(s, temp);
2875 len += i;
2876 s += i;
2877 if (j < 14) {
2878 *s++ = ':';
2879 ++len;
2880 }
2881 }
2882 }
2883 if (compressing) {
2884 *s++ = ':';
2885 ++len;
2886 }
2887 *s = 0;
2888 return len;
2889 }
2890
2891 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2892 struct pktgen_dev *pkt_dev)
2893 {
2894 struct sk_buff *skb = NULL;
2895 __u8 *eth;
2896 struct udphdr *udph;
2897 int datalen;
2898 struct ipv6hdr *iph;
2899 struct pktgen_hdr *pgh = NULL;
2900 __be16 protocol = htons(ETH_P_IPV6);
2901 __be32 *mpls;
2902 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2903 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2904 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2905 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2906 u16 queue_map;
2907
2908 if (pkt_dev->nr_labels)
2909 protocol = htons(ETH_P_MPLS_UC);
2910
2911 if (pkt_dev->vlan_id != 0xffff)
2912 protocol = htons(ETH_P_8021Q);
2913
2914 /* Update any of the values, used when we're incrementing various
2915 * fields.
2916 */
2917 queue_map = pkt_dev->cur_queue_map;
2918 mod_cur_headers(pkt_dev);
2919
2920 skb = __netdev_alloc_skb(odev,
2921 pkt_dev->cur_pkt_size + 64
2922 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
2923 if (!skb) {
2924 sprintf(pkt_dev->result, "No memory");
2925 return NULL;
2926 }
2927
2928 skb_reserve(skb, 16);
2929
2930 /* Reserve for ethernet and IP header */
2931 eth = (__u8 *) skb_push(skb, 14);
2932 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2933 if (pkt_dev->nr_labels)
2934 mpls_push(mpls, pkt_dev);
2935
2936 if (pkt_dev->vlan_id != 0xffff) {
2937 if (pkt_dev->svlan_id != 0xffff) {
2938 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2939 *svlan_tci = build_tci(pkt_dev->svlan_id,
2940 pkt_dev->svlan_cfi,
2941 pkt_dev->svlan_p);
2942 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2943 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2944 }
2945 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2946 *vlan_tci = build_tci(pkt_dev->vlan_id,
2947 pkt_dev->vlan_cfi,
2948 pkt_dev->vlan_p);
2949 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2950 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2951 }
2952
2953 skb->network_header = skb->tail;
2954 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2955 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2956 skb_set_queue_mapping(skb, queue_map);
2957 iph = ipv6_hdr(skb);
2958 udph = udp_hdr(skb);
2959
2960 memcpy(eth, pkt_dev->hh, 12);
2961 *(__be16 *) &eth[12] = protocol;
2962
2963 /* Eth + IPh + UDPh + mpls */
2964 datalen = pkt_dev->cur_pkt_size - 14 -
2965 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2966 pkt_dev->pkt_overhead;
2967
2968 if (datalen < sizeof(struct pktgen_hdr)) {
2969 datalen = sizeof(struct pktgen_hdr);
2970 if (net_ratelimit())
2971 printk(KERN_INFO "pktgen: increased datalen to %d\n",
2972 datalen);
2973 }
2974
2975 udph->source = htons(pkt_dev->cur_udp_src);
2976 udph->dest = htons(pkt_dev->cur_udp_dst);
2977 udph->len = htons(datalen + sizeof(struct udphdr));
2978 udph->check = 0; /* No checksum */
2979
2980 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2981
2982 if (pkt_dev->traffic_class) {
2983 /* Version + traffic class + flow (0) */
2984 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2985 }
2986
2987 iph->hop_limit = 32;
2988
2989 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2990 iph->nexthdr = IPPROTO_UDP;
2991
2992 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2993 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2994
2995 skb->mac_header = (skb->network_header - ETH_HLEN -
2996 pkt_dev->pkt_overhead);
2997 skb->protocol = protocol;
2998 skb->dev = odev;
2999 skb->pkt_type = PACKET_HOST;
3000
3001 if (pkt_dev->nfrags <= 0)
3002 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
3003 else {
3004 int frags = pkt_dev->nfrags;
3005 int i;
3006
3007 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
3008
3009 if (frags > MAX_SKB_FRAGS)
3010 frags = MAX_SKB_FRAGS;
3011 if (datalen > frags * PAGE_SIZE) {
3012 skb_put(skb, datalen - frags * PAGE_SIZE);
3013 datalen = frags * PAGE_SIZE;
3014 }
3015
3016 i = 0;
3017 while (datalen > 0) {
3018 struct page *page = alloc_pages(GFP_KERNEL, 0);
3019 skb_shinfo(skb)->frags[i].page = page;
3020 skb_shinfo(skb)->frags[i].page_offset = 0;
3021 skb_shinfo(skb)->frags[i].size =
3022 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
3023 datalen -= skb_shinfo(skb)->frags[i].size;
3024 skb->len += skb_shinfo(skb)->frags[i].size;
3025 skb->data_len += skb_shinfo(skb)->frags[i].size;
3026 i++;
3027 skb_shinfo(skb)->nr_frags = i;
3028 }
3029
3030 while (i < frags) {
3031 int rem;
3032
3033 if (i == 0)
3034 break;
3035
3036 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
3037 if (rem == 0)
3038 break;
3039
3040 skb_shinfo(skb)->frags[i - 1].size -= rem;
3041
3042 skb_shinfo(skb)->frags[i] =
3043 skb_shinfo(skb)->frags[i - 1];
3044 get_page(skb_shinfo(skb)->frags[i].page);
3045 skb_shinfo(skb)->frags[i].page =
3046 skb_shinfo(skb)->frags[i - 1].page;
3047 skb_shinfo(skb)->frags[i].page_offset +=
3048 skb_shinfo(skb)->frags[i - 1].size;
3049 skb_shinfo(skb)->frags[i].size = rem;
3050 i++;
3051 skb_shinfo(skb)->nr_frags = i;
3052 }
3053 }
3054
3055 /* Stamp the time, and sequence number,
3056 * convert them to network byte order
3057 * should we update cloned packets too ?
3058 */
3059 if (pgh) {
3060 struct timeval timestamp;
3061
3062 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
3063 pgh->seq_num = htonl(pkt_dev->seq_num);
3064
3065 do_gettimeofday(&timestamp);
3066 pgh->tv_sec = htonl(timestamp.tv_sec);
3067 pgh->tv_usec = htonl(timestamp.tv_usec);
3068 }
3069 /* pkt_dev->seq_num++; FF: you really mean this? */
3070
3071 return skb;
3072 }
3073
3074 static struct sk_buff *fill_packet(struct net_device *odev,
3075 struct pktgen_dev *pkt_dev)
3076 {
3077 if (pkt_dev->flags & F_IPV6)
3078 return fill_packet_ipv6(odev, pkt_dev);
3079 else
3080 return fill_packet_ipv4(odev, pkt_dev);
3081 }
3082
3083 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3084 {
3085 pkt_dev->seq_num = 1;
3086 pkt_dev->idle_acc = 0;
3087 pkt_dev->sofar = 0;
3088 pkt_dev->tx_bytes = 0;
3089 pkt_dev->errors = 0;
3090 }
3091
3092 /* Set up structure for sending pkts, clear counters */
3093
3094 static void pktgen_run(struct pktgen_thread *t)
3095 {
3096 struct pktgen_dev *pkt_dev;
3097 int started = 0;
3098
3099 pr_debug("pktgen: entering pktgen_run. %p\n", t);
3100
3101 if_lock(t);
3102 list_for_each_entry(pkt_dev, &t->if_list, list) {
3103
3104 /*
3105 * setup odev and create initial packet.
3106 */
3107 pktgen_setup_inject(pkt_dev);
3108
3109 if (pkt_dev->odev) {
3110 pktgen_clear_counters(pkt_dev);
3111 pkt_dev->running = 1; /* Cranke yeself! */
3112 pkt_dev->skb = NULL;
3113 pkt_dev->started_at =
3114 pkt_dev->next_tx = ktime_now();
3115
3116 set_pkt_overhead(pkt_dev);
3117
3118 strcpy(pkt_dev->result, "Starting");
3119 started++;
3120 } else
3121 strcpy(pkt_dev->result, "Error starting");
3122 }
3123 if_unlock(t);
3124 if (started)
3125 t->control &= ~(T_STOP);
3126 }
3127
3128 static void pktgen_stop_all_threads_ifs(void)
3129 {
3130 struct pktgen_thread *t;
3131
3132 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n");
3133
3134 mutex_lock(&pktgen_thread_lock);
3135
3136 list_for_each_entry(t, &pktgen_threads, th_list)
3137 t->control |= T_STOP;
3138
3139 mutex_unlock(&pktgen_thread_lock);
3140 }
3141
3142 static int thread_is_running(const struct pktgen_thread *t)
3143 {
3144 const struct pktgen_dev *pkt_dev;
3145
3146 list_for_each_entry(pkt_dev, &t->if_list, list)
3147 if (pkt_dev->running)
3148 return 1;
3149 return 0;
3150 }
3151
3152 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3153 {
3154 if_lock(t);
3155
3156 while (thread_is_running(t)) {
3157
3158 if_unlock(t);
3159
3160 msleep_interruptible(100);
3161
3162 if (signal_pending(current))
3163 goto signal;
3164 if_lock(t);
3165 }
3166 if_unlock(t);
3167 return 1;
3168 signal:
3169 return 0;
3170 }
3171
3172 static int pktgen_wait_all_threads_run(void)
3173 {
3174 struct pktgen_thread *t;
3175 int sig = 1;
3176
3177 mutex_lock(&pktgen_thread_lock);
3178
3179 list_for_each_entry(t, &pktgen_threads, th_list) {
3180 sig = pktgen_wait_thread_run(t);
3181 if (sig == 0)
3182 break;
3183 }
3184
3185 if (sig == 0)
3186 list_for_each_entry(t, &pktgen_threads, th_list)
3187 t->control |= (T_STOP);
3188
3189 mutex_unlock(&pktgen_thread_lock);
3190 return sig;
3191 }
3192
3193 static void pktgen_run_all_threads(void)
3194 {
3195 struct pktgen_thread *t;
3196
3197 pr_debug("pktgen: entering pktgen_run_all_threads.\n");
3198
3199 mutex_lock(&pktgen_thread_lock);
3200
3201 list_for_each_entry(t, &pktgen_threads, th_list)
3202 t->control |= (T_RUN);
3203
3204 mutex_unlock(&pktgen_thread_lock);
3205
3206 /* Propagate thread->control */
3207 schedule_timeout_interruptible(msecs_to_jiffies(125));
3208
3209 pktgen_wait_all_threads_run();
3210 }
3211
3212 static void pktgen_reset_all_threads(void)
3213 {
3214 struct pktgen_thread *t;
3215
3216 pr_debug("pktgen: entering pktgen_reset_all_threads.\n");
3217
3218 mutex_lock(&pktgen_thread_lock);
3219
3220 list_for_each_entry(t, &pktgen_threads, th_list)
3221 t->control |= (T_REMDEVALL);
3222
3223 mutex_unlock(&pktgen_thread_lock);
3224
3225 /* Propagate thread->control */
3226 schedule_timeout_interruptible(msecs_to_jiffies(125));
3227
3228 pktgen_wait_all_threads_run();
3229 }
3230
3231 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3232 {
3233 __u64 bps, mbps, pps;
3234 char *p = pkt_dev->result;
3235 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3236 pkt_dev->started_at);
3237 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3238
3239 p += sprintf(p, "OK: %llu(c%llu+d%llu) nsec, %llu (%dbyte,%dfrags)\n",
3240 (unsigned long long)ktime_to_us(elapsed),
3241 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3242 (unsigned long long)ktime_to_us(idle),
3243 (unsigned long long)pkt_dev->sofar,
3244 pkt_dev->cur_pkt_size, nr_frags);
3245
3246 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3247 ktime_to_ns(elapsed));
3248
3249 bps = pps * 8 * pkt_dev->cur_pkt_size;
3250
3251 mbps = bps;
3252 do_div(mbps, 1000000);
3253 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3254 (unsigned long long)pps,
3255 (unsigned long long)mbps,
3256 (unsigned long long)bps,
3257 (unsigned long long)pkt_dev->errors);
3258 }
3259
3260 /* Set stopped-at timer, remove from running list, do counters & statistics */
3261 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3262 {
3263 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3264
3265 if (!pkt_dev->running) {
3266 printk(KERN_WARNING "pktgen: interface: %s is already "
3267 "stopped\n", pkt_dev->odevname);
3268 return -EINVAL;
3269 }
3270
3271 kfree_skb(pkt_dev->skb);
3272 pkt_dev->skb = NULL;
3273 pkt_dev->stopped_at = ktime_now();
3274 pkt_dev->running = 0;
3275
3276 show_results(pkt_dev, nr_frags);
3277
3278 return 0;
3279 }
3280
3281 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3282 {
3283 struct pktgen_dev *pkt_dev, *best = NULL;
3284
3285 if_lock(t);
3286
3287 list_for_each_entry(pkt_dev, &t->if_list, list) {
3288 if (!pkt_dev->running)
3289 continue;
3290 if (best == NULL)
3291 best = pkt_dev;
3292 else if (ktime_lt(pkt_dev->next_tx, best->next_tx))
3293 best = pkt_dev;
3294 }
3295 if_unlock(t);
3296 return best;
3297 }
3298
3299 static void pktgen_stop(struct pktgen_thread *t)
3300 {
3301 struct pktgen_dev *pkt_dev;
3302
3303 pr_debug("pktgen: entering pktgen_stop\n");
3304
3305 if_lock(t);
3306
3307 list_for_each_entry(pkt_dev, &t->if_list, list) {
3308 pktgen_stop_device(pkt_dev);
3309 }
3310
3311 if_unlock(t);
3312 }
3313
3314 /*
3315 * one of our devices needs to be removed - find it
3316 * and remove it
3317 */
3318 static void pktgen_rem_one_if(struct pktgen_thread *t)
3319 {
3320 struct list_head *q, *n;
3321 struct pktgen_dev *cur;
3322
3323 pr_debug("pktgen: entering pktgen_rem_one_if\n");
3324
3325 if_lock(t);
3326
3327 list_for_each_safe(q, n, &t->if_list) {
3328 cur = list_entry(q, struct pktgen_dev, list);
3329
3330 if (!cur->removal_mark)
3331 continue;
3332
3333 kfree_skb(cur->skb);
3334 cur->skb = NULL;
3335
3336 pktgen_remove_device(t, cur);
3337
3338 break;
3339 }
3340
3341 if_unlock(t);
3342 }
3343
3344 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3345 {
3346 struct list_head *q, *n;
3347 struct pktgen_dev *cur;
3348
3349 /* Remove all devices, free mem */
3350
3351 pr_debug("pktgen: entering pktgen_rem_all_ifs\n");
3352 if_lock(t);
3353
3354 list_for_each_safe(q, n, &t->if_list) {
3355 cur = list_entry(q, struct pktgen_dev, list);
3356
3357 kfree_skb(cur->skb);
3358 cur->skb = NULL;
3359
3360 pktgen_remove_device(t, cur);
3361 }
3362
3363 if_unlock(t);
3364 }
3365
3366 static void pktgen_rem_thread(struct pktgen_thread *t)
3367 {
3368 /* Remove from the thread list */
3369
3370 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3371
3372 mutex_lock(&pktgen_thread_lock);
3373
3374 list_del(&t->th_list);
3375
3376 mutex_unlock(&pktgen_thread_lock);
3377 }
3378
3379 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3380 {
3381 ktime_t idle_start = ktime_now();
3382 schedule();
3383 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3384 }
3385
3386 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3387 {
3388 ktime_t idle_start = ktime_now();
3389
3390 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3391 if (signal_pending(current))
3392 break;
3393
3394 if (need_resched())
3395 pktgen_resched(pkt_dev);
3396 else
3397 cpu_relax();
3398 }
3399 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3400 }
3401
3402 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3403 {
3404 struct net_device *odev = pkt_dev->odev;
3405 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3406 = odev->netdev_ops->ndo_start_xmit;
3407 struct netdev_queue *txq;
3408 u16 queue_map;
3409 int ret;
3410
3411 /* If device is offline, then don't send */
3412 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3413 pktgen_stop_device(pkt_dev);
3414 return;
3415 }
3416
3417 /* This is max DELAY, this has special meaning of
3418 * "never transmit"
3419 */
3420 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3421 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX);
3422 return;
3423 }
3424
3425 /* If no skb or clone count exhausted then get new one */
3426 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3427 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3428 /* build a new pkt */
3429 kfree_skb(pkt_dev->skb);
3430
3431 pkt_dev->skb = fill_packet(odev, pkt_dev);
3432 if (pkt_dev->skb == NULL) {
3433 printk(KERN_ERR "pktgen: ERROR: couldn't "
3434 "allocate skb in fill_packet.\n");
3435 schedule();
3436 pkt_dev->clone_count--; /* back out increment, OOM */
3437 return;
3438 }
3439
3440 pkt_dev->allocated_skbs++;
3441 pkt_dev->clone_count = 0; /* reset counter */
3442 }
3443
3444 if (pkt_dev->delay && pkt_dev->last_ok)
3445 spin(pkt_dev, pkt_dev->next_tx);
3446
3447 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3448 txq = netdev_get_tx_queue(odev, queue_map);
3449
3450 __netif_tx_lock_bh(txq);
3451 atomic_inc(&(pkt_dev->skb->users));
3452
3453 if (unlikely(netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq)))
3454 ret = NETDEV_TX_BUSY;
3455 else
3456 ret = (*xmit)(pkt_dev->skb, odev);
3457
3458 switch (ret) {
3459 case NETDEV_TX_OK:
3460 txq_trans_update(txq);
3461 pkt_dev->last_ok = 1;
3462 pkt_dev->sofar++;
3463 pkt_dev->seq_num++;
3464 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size;
3465 break;
3466 default: /* Drivers are not supposed to return other values! */
3467 if (net_ratelimit())
3468 pr_info("pktgen: %s xmit error: %d\n",
3469 pkt_dev->odevname, ret);
3470 pkt_dev->errors++;
3471 /* fallthru */
3472 case NETDEV_TX_LOCKED:
3473 case NETDEV_TX_BUSY:
3474 /* Retry it next time */
3475 atomic_dec(&(pkt_dev->skb->users));
3476 pkt_dev->last_ok = 0;
3477 }
3478 __netif_tx_unlock_bh(txq);
3479
3480 /* If pkt_dev->count is zero, then run forever */
3481 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3482 pktgen_wait_for_skb(pkt_dev);
3483
3484 /* Done with this */
3485 pktgen_stop_device(pkt_dev);
3486 }
3487 }
3488
3489 /*
3490 * Main loop of the thread goes here
3491 */
3492
3493 static int pktgen_thread_worker(void *arg)
3494 {
3495 DEFINE_WAIT(wait);
3496 struct pktgen_thread *t = arg;
3497 struct pktgen_dev *pkt_dev = NULL;
3498 int cpu = t->cpu;
3499
3500 BUG_ON(smp_processor_id() != cpu);
3501
3502 init_waitqueue_head(&t->queue);
3503 complete(&t->start_done);
3504
3505 pr_debug("pktgen: starting pktgen/%d: pid=%d\n",
3506 cpu, task_pid_nr(current));
3507
3508 set_current_state(TASK_INTERRUPTIBLE);
3509
3510 set_freezable();
3511
3512 while (!kthread_should_stop()) {
3513 pkt_dev = next_to_run(t);
3514
3515 if (unlikely(!pkt_dev && t->control == 0)) {
3516 wait_event_interruptible_timeout(t->queue,
3517 t->control != 0,
3518 HZ/10);
3519 try_to_freeze();
3520 continue;
3521 }
3522
3523 __set_current_state(TASK_RUNNING);
3524
3525 if (likely(pkt_dev)) {
3526 pktgen_xmit(pkt_dev);
3527
3528 if (need_resched())
3529 pktgen_resched(pkt_dev);
3530 else
3531 cpu_relax();
3532 }
3533
3534 if (t->control & T_STOP) {
3535 pktgen_stop(t);
3536 t->control &= ~(T_STOP);
3537 }
3538
3539 if (t->control & T_RUN) {
3540 pktgen_run(t);
3541 t->control &= ~(T_RUN);
3542 }
3543
3544 if (t->control & T_REMDEVALL) {
3545 pktgen_rem_all_ifs(t);
3546 t->control &= ~(T_REMDEVALL);
3547 }
3548
3549 if (t->control & T_REMDEV) {
3550 pktgen_rem_one_if(t);
3551 t->control &= ~(T_REMDEV);
3552 }
3553
3554 try_to_freeze();
3555
3556 set_current_state(TASK_INTERRUPTIBLE);
3557 }
3558
3559 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm);
3560 pktgen_stop(t);
3561
3562 pr_debug("pktgen: %s removing all device\n", t->tsk->comm);
3563 pktgen_rem_all_ifs(t);
3564
3565 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm);
3566 pktgen_rem_thread(t);
3567
3568 return 0;
3569 }
3570
3571 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3572 const char *ifname, bool exact)
3573 {
3574 struct pktgen_dev *p, *pkt_dev = NULL;
3575 size_t len = strlen(ifname);
3576
3577 if_lock(t);
3578 list_for_each_entry(p, &t->if_list, list)
3579 if (strncmp(p->odevname, ifname, len) == 0) {
3580 if (p->odevname[len]) {
3581 if (exact || p->odevname[len] != '@')
3582 continue;
3583 }
3584 pkt_dev = p;
3585 break;
3586 }
3587
3588 if_unlock(t);
3589 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev);
3590 return pkt_dev;
3591 }
3592
3593 /*
3594 * Adds a dev at front of if_list.
3595 */
3596
3597 static int add_dev_to_thread(struct pktgen_thread *t,
3598 struct pktgen_dev *pkt_dev)
3599 {
3600 int rv = 0;
3601
3602 if_lock(t);
3603
3604 if (pkt_dev->pg_thread) {
3605 printk(KERN_ERR "pktgen: ERROR: already assigned "
3606 "to a thread.\n");
3607 rv = -EBUSY;
3608 goto out;
3609 }
3610
3611 list_add(&pkt_dev->list, &t->if_list);
3612 pkt_dev->pg_thread = t;
3613 pkt_dev->running = 0;
3614
3615 out:
3616 if_unlock(t);
3617 return rv;
3618 }
3619
3620 /* Called under thread lock */
3621
3622 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3623 {
3624 struct pktgen_dev *pkt_dev;
3625 int err;
3626
3627 /* We don't allow a device to be on several threads */
3628
3629 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3630 if (pkt_dev) {
3631 printk(KERN_ERR "pktgen: ERROR: interface already used.\n");
3632 return -EBUSY;
3633 }
3634
3635 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
3636 if (!pkt_dev)
3637 return -ENOMEM;
3638
3639 strcpy(pkt_dev->odevname, ifname);
3640 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state));
3641 if (pkt_dev->flows == NULL) {
3642 kfree(pkt_dev);
3643 return -ENOMEM;
3644 }
3645 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3646
3647 pkt_dev->removal_mark = 0;
3648 pkt_dev->min_pkt_size = ETH_ZLEN;
3649 pkt_dev->max_pkt_size = ETH_ZLEN;
3650 pkt_dev->nfrags = 0;
3651 pkt_dev->clone_skb = pg_clone_skb_d;
3652 pkt_dev->delay = pg_delay_d;
3653 pkt_dev->count = pg_count_d;
3654 pkt_dev->sofar = 0;
3655 pkt_dev->udp_src_min = 9; /* sink port */
3656 pkt_dev->udp_src_max = 9;
3657 pkt_dev->udp_dst_min = 9;
3658 pkt_dev->udp_dst_max = 9;
3659
3660 pkt_dev->vlan_p = 0;
3661 pkt_dev->vlan_cfi = 0;
3662 pkt_dev->vlan_id = 0xffff;
3663 pkt_dev->svlan_p = 0;
3664 pkt_dev->svlan_cfi = 0;
3665 pkt_dev->svlan_id = 0xffff;
3666
3667 err = pktgen_setup_dev(pkt_dev, ifname);
3668 if (err)
3669 goto out1;
3670
3671 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3672 &pktgen_if_fops, pkt_dev);
3673 if (!pkt_dev->entry) {
3674 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3675 PG_PROC_DIR, ifname);
3676 err = -EINVAL;
3677 goto out2;
3678 }
3679 #ifdef CONFIG_XFRM
3680 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3681 pkt_dev->ipsproto = IPPROTO_ESP;
3682 #endif
3683
3684 return add_dev_to_thread(t, pkt_dev);
3685 out2:
3686 dev_put(pkt_dev->odev);
3687 out1:
3688 #ifdef CONFIG_XFRM
3689 free_SAs(pkt_dev);
3690 #endif
3691 vfree(pkt_dev->flows);
3692 kfree(pkt_dev);
3693 return err;
3694 }
3695
3696 static int __init pktgen_create_thread(int cpu)
3697 {
3698 struct pktgen_thread *t;
3699 struct proc_dir_entry *pe;
3700 struct task_struct *p;
3701
3702 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL);
3703 if (!t) {
3704 printk(KERN_ERR "pktgen: ERROR: out of memory, can't "
3705 "create new thread.\n");
3706 return -ENOMEM;
3707 }
3708
3709 spin_lock_init(&t->if_lock);
3710 t->cpu = cpu;
3711
3712 INIT_LIST_HEAD(&t->if_list);
3713
3714 list_add_tail(&t->th_list, &pktgen_threads);
3715 init_completion(&t->start_done);
3716
3717 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu);
3718 if (IS_ERR(p)) {
3719 printk(KERN_ERR "pktgen: kernel_thread() failed "
3720 "for cpu %d\n", t->cpu);
3721 list_del(&t->th_list);
3722 kfree(t);
3723 return PTR_ERR(p);
3724 }
3725 kthread_bind(p, cpu);
3726 t->tsk = p;
3727
3728 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3729 &pktgen_thread_fops, t);
3730 if (!pe) {
3731 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3732 PG_PROC_DIR, t->tsk->comm);
3733 kthread_stop(p);
3734 list_del(&t->th_list);
3735 kfree(t);
3736 return -EINVAL;
3737 }
3738
3739 wake_up_process(p);
3740 wait_for_completion(&t->start_done);
3741
3742 return 0;
3743 }
3744
3745 /*
3746 * Removes a device from the thread if_list.
3747 */
3748 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3749 struct pktgen_dev *pkt_dev)
3750 {
3751 struct list_head *q, *n;
3752 struct pktgen_dev *p;
3753
3754 list_for_each_safe(q, n, &t->if_list) {
3755 p = list_entry(q, struct pktgen_dev, list);
3756 if (p == pkt_dev)
3757 list_del(&p->list);
3758 }
3759 }
3760
3761 static int pktgen_remove_device(struct pktgen_thread *t,
3762 struct pktgen_dev *pkt_dev)
3763 {
3764
3765 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev);
3766
3767 if (pkt_dev->running) {
3768 printk(KERN_WARNING "pktgen: WARNING: trying to remove a "
3769 "running interface, stopping it now.\n");
3770 pktgen_stop_device(pkt_dev);
3771 }
3772
3773 /* Dis-associate from the interface */
3774
3775 if (pkt_dev->odev) {
3776 dev_put(pkt_dev->odev);
3777 pkt_dev->odev = NULL;
3778 }
3779
3780 /* And update the thread if_list */
3781
3782 _rem_dev_from_if_list(t, pkt_dev);
3783
3784 if (pkt_dev->entry)
3785 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3786
3787 #ifdef CONFIG_XFRM
3788 free_SAs(pkt_dev);
3789 #endif
3790 vfree(pkt_dev->flows);
3791 kfree(pkt_dev);
3792 return 0;
3793 }
3794
3795 static int __init pg_init(void)
3796 {
3797 int cpu;
3798 struct proc_dir_entry *pe;
3799
3800 printk(KERN_INFO "%s", version);
3801
3802 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3803 if (!pg_proc_dir)
3804 return -ENODEV;
3805
3806 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3807 if (pe == NULL) {
3808 printk(KERN_ERR "pktgen: ERROR: cannot create %s "
3809 "procfs entry.\n", PGCTRL);
3810 proc_net_remove(&init_net, PG_PROC_DIR);
3811 return -EINVAL;
3812 }
3813
3814 /* Register us to receive netdevice events */
3815 register_netdevice_notifier(&pktgen_notifier_block);
3816
3817 for_each_online_cpu(cpu) {
3818 int err;
3819
3820 err = pktgen_create_thread(cpu);
3821 if (err)
3822 printk(KERN_WARNING "pktgen: WARNING: Cannot create "
3823 "thread for cpu %d (%d)\n", cpu, err);
3824 }
3825
3826 if (list_empty(&pktgen_threads)) {
3827 printk(KERN_ERR "pktgen: ERROR: Initialization failed for "
3828 "all threads\n");
3829 unregister_netdevice_notifier(&pktgen_notifier_block);
3830 remove_proc_entry(PGCTRL, pg_proc_dir);
3831 proc_net_remove(&init_net, PG_PROC_DIR);
3832 return -ENODEV;
3833 }
3834
3835 return 0;
3836 }
3837
3838 static void __exit pg_cleanup(void)
3839 {
3840 struct pktgen_thread *t;
3841 struct list_head *q, *n;
3842 wait_queue_head_t queue;
3843 init_waitqueue_head(&queue);
3844
3845 /* Stop all interfaces & threads */
3846
3847 list_for_each_safe(q, n, &pktgen_threads) {
3848 t = list_entry(q, struct pktgen_thread, th_list);
3849 kthread_stop(t->tsk);
3850 kfree(t);
3851 }
3852
3853 /* Un-register us from receiving netdevice events */
3854 unregister_netdevice_notifier(&pktgen_notifier_block);
3855
3856 /* Clean up proc file system */
3857 remove_proc_entry(PGCTRL, pg_proc_dir);
3858 proc_net_remove(&init_net, PG_PROC_DIR);
3859 }
3860
3861 module_init(pg_init);
3862 module_exit(pg_cleanup);
3863
3864 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3865 MODULE_DESCRIPTION("Packet Generator tool");
3866 MODULE_LICENSE("GPL");
3867 MODULE_VERSION(VERSION);
3868 module_param(pg_count_d, int, 0);
3869 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3870 module_param(pg_delay_d, int, 0);
3871 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3872 module_param(pg_clone_skb_d, int, 0);
3873 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3874 module_param(debug, int, 0);
3875 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
kernels