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MINI2440: Added new T35 (QVGA) and Innolux 5.6" (VGA) TFTs
[linux-2.6/mini2440.git] / net / core / pktgen.c
blob6eb8d47cbf3a563f7d6479183a1b6339afc839cb
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 struct flow_state *flows;
367 unsigned cflows; /* Concurrent flows (config) */
368 unsigned lflow; /* Flow length (config) */
369 unsigned nflows; /* accumulated flows (stats) */
370 unsigned curfl; /* current sequenced flow (state)*/
371
372 u16 queue_map_min;
373 u16 queue_map_max;
374
375 #ifdef CONFIG_XFRM
376 __u8 ipsmode; /* IPSEC mode (config) */
377 __u8 ipsproto; /* IPSEC type (config) */
378 #endif
379 char result[512];
380 };
381
382 struct pktgen_hdr {
383 __be32 pgh_magic;
384 __be32 seq_num;
385 __be32 tv_sec;
386 __be32 tv_usec;
387 };
388
389 struct pktgen_thread {
390 spinlock_t if_lock; /* for list of devices */
391 struct list_head if_list; /* All device here */
392 struct list_head th_list;
393 struct task_struct *tsk;
394 char result[512];
395
396 /* Field for thread to receive "posted" events terminate,
397 stop ifs etc. */
398
399 u32 control;
400 int cpu;
401
402 wait_queue_head_t queue;
403 struct completion start_done;
404 };
405
406 #define REMOVE 1
407 #define FIND 0
408
409 static inline ktime_t ktime_now(void)
410 {
411 struct timespec ts;
412 ktime_get_ts(&ts);
413
414 return timespec_to_ktime(ts);
415 }
416
417 /* This works even if 32 bit because of careful byte order choice */
418 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2)
419 {
420 return cmp1.tv64 < cmp2.tv64;
421 }
422
423 static const char version[] =
424 "pktgen " VERSION ": Packet Generator for packet performance testing.\n";
425
426 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
427 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
428 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
429 const char *ifname);
430 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
431 static void pktgen_run_all_threads(void);
432 static void pktgen_reset_all_threads(void);
433 static void pktgen_stop_all_threads_ifs(void);
434
435 static void pktgen_stop(struct pktgen_thread *t);
436 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
437
438 static unsigned int scan_ip6(const char *s, char ip[16]);
439 static unsigned int fmt_ip6(char *s, const char ip[16]);
440
441 /* Module parameters, defaults. */
442 static int pg_count_d __read_mostly = 1000;
443 static int pg_delay_d __read_mostly;
444 static int pg_clone_skb_d __read_mostly;
445 static int debug __read_mostly;
446
447 static DEFINE_MUTEX(pktgen_thread_lock);
448 static LIST_HEAD(pktgen_threads);
449
450 static struct notifier_block pktgen_notifier_block = {
451 .notifier_call = pktgen_device_event,
452 };
453
454 /*
455 * /proc handling functions
456 *
457 */
458
459 static int pgctrl_show(struct seq_file *seq, void *v)
460 {
461 seq_puts(seq, version);
462 return 0;
463 }
464
465 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
466 size_t count, loff_t *ppos)
467 {
468 int err = 0;
469 char data[128];
470
471 if (!capable(CAP_NET_ADMIN)) {
472 err = -EPERM;
473 goto out;
474 }
475
476 if (count > sizeof(data))
477 count = sizeof(data);
478
479 if (copy_from_user(data, buf, count)) {
480 err = -EFAULT;
481 goto out;
482 }
483 data[count - 1] = 0; /* Make string */
484
485 if (!strcmp(data, "stop"))
486 pktgen_stop_all_threads_ifs();
487
488 else if (!strcmp(data, "start"))
489 pktgen_run_all_threads();
490
491 else if (!strcmp(data, "reset"))
492 pktgen_reset_all_threads();
493
494 else
495 printk(KERN_WARNING "pktgen: Unknown command: %s\n", data);
496
497 err = count;
498
499 out:
500 return err;
501 }
502
503 static int pgctrl_open(struct inode *inode, struct file *file)
504 {
505 return single_open(file, pgctrl_show, PDE(inode)->data);
506 }
507
508 static const struct file_operations pktgen_fops = {
509 .owner = THIS_MODULE,
510 .open = pgctrl_open,
511 .read = seq_read,
512 .llseek = seq_lseek,
513 .write = pgctrl_write,
514 .release = single_release,
515 };
516
517 static int pktgen_if_show(struct seq_file *seq, void *v)
518 {
519 const struct pktgen_dev *pkt_dev = seq->private;
520 ktime_t stopped;
521 u64 idle;
522
523 seq_printf(seq,
524 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
525 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
526 pkt_dev->max_pkt_size);
527
528 seq_printf(seq,
529 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
530 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
531 pkt_dev->clone_skb, pkt_dev->odev->name);
532
533 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
534 pkt_dev->lflow);
535
536 seq_printf(seq,
537 " queue_map_min: %u queue_map_max: %u\n",
538 pkt_dev->queue_map_min,
539 pkt_dev->queue_map_max);
540
541 if (pkt_dev->flags & F_IPV6) {
542 char b1[128], b2[128], b3[128];
543 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
544 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
545 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
546 seq_printf(seq,
547 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
548 b2, b3);
549
550 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
551 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
552 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
553 seq_printf(seq,
554 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
555 b2, b3);
556
557 } else {
558 seq_printf(seq,
559 " dst_min: %s dst_max: %s\n",
560 pkt_dev->dst_min, pkt_dev->dst_max);
561 seq_printf(seq,
562 " src_min: %s src_max: %s\n",
563 pkt_dev->src_min, pkt_dev->src_max);
564 }
565
566 seq_puts(seq, " src_mac: ");
567
568 seq_printf(seq, "%pM ",
569 is_zero_ether_addr(pkt_dev->src_mac) ?
570 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
571
572 seq_printf(seq, "dst_mac: ");
573 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
574
575 seq_printf(seq,
576 " udp_src_min: %d udp_src_max: %d"
577 " udp_dst_min: %d udp_dst_max: %d\n",
578 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
579 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
580
581 seq_printf(seq,
582 " src_mac_count: %d dst_mac_count: %d\n",
583 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
584
585 if (pkt_dev->nr_labels) {
586 unsigned i;
587 seq_printf(seq, " mpls: ");
588 for (i = 0; i < pkt_dev->nr_labels; i++)
589 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
590 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
591 }
592
593 if (pkt_dev->vlan_id != 0xffff)
594 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
595 pkt_dev->vlan_id, pkt_dev->vlan_p,
596 pkt_dev->vlan_cfi);
597
598 if (pkt_dev->svlan_id != 0xffff)
599 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
600 pkt_dev->svlan_id, pkt_dev->svlan_p,
601 pkt_dev->svlan_cfi);
602
603 if (pkt_dev->tos)
604 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
605
606 if (pkt_dev->traffic_class)
607 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
608
609 seq_printf(seq, " Flags: ");
610
611 if (pkt_dev->flags & F_IPV6)
612 seq_printf(seq, "IPV6 ");
613
614 if (pkt_dev->flags & F_IPSRC_RND)
615 seq_printf(seq, "IPSRC_RND ");
616
617 if (pkt_dev->flags & F_IPDST_RND)
618 seq_printf(seq, "IPDST_RND ");
619
620 if (pkt_dev->flags & F_TXSIZE_RND)
621 seq_printf(seq, "TXSIZE_RND ");
622
623 if (pkt_dev->flags & F_UDPSRC_RND)
624 seq_printf(seq, "UDPSRC_RND ");
625
626 if (pkt_dev->flags & F_UDPDST_RND)
627 seq_printf(seq, "UDPDST_RND ");
628
629 if (pkt_dev->flags & F_MPLS_RND)
630 seq_printf(seq, "MPLS_RND ");
631
632 if (pkt_dev->flags & F_QUEUE_MAP_RND)
633 seq_printf(seq, "QUEUE_MAP_RND ");
634
635 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
636 seq_printf(seq, "QUEUE_MAP_CPU ");
637
638 if (pkt_dev->cflows) {
639 if (pkt_dev->flags & F_FLOW_SEQ)
640 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
641 else
642 seq_printf(seq, "FLOW_RND ");
643 }
644
645 #ifdef CONFIG_XFRM
646 if (pkt_dev->flags & F_IPSEC_ON)
647 seq_printf(seq, "IPSEC ");
648 #endif
649
650 if (pkt_dev->flags & F_MACSRC_RND)
651 seq_printf(seq, "MACSRC_RND ");
652
653 if (pkt_dev->flags & F_MACDST_RND)
654 seq_printf(seq, "MACDST_RND ");
655
656 if (pkt_dev->flags & F_VID_RND)
657 seq_printf(seq, "VID_RND ");
658
659 if (pkt_dev->flags & F_SVID_RND)
660 seq_printf(seq, "SVID_RND ");
661
662 seq_puts(seq, "\n");
663
664 /* not really stopped, more like last-running-at */
665 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at;
666 idle = pkt_dev->idle_acc;
667 do_div(idle, NSEC_PER_USEC);
668
669 seq_printf(seq,
670 "Current:\n pkts-sofar: %llu errors: %llu\n",
671 (unsigned long long)pkt_dev->sofar,
672 (unsigned long long)pkt_dev->errors);
673
674 seq_printf(seq,
675 " started: %lluus stopped: %lluus idle: %lluus\n",
676 (unsigned long long) ktime_to_us(pkt_dev->started_at),
677 (unsigned long long) ktime_to_us(stopped),
678 (unsigned long long) idle);
679
680 seq_printf(seq,
681 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
682 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
683 pkt_dev->cur_src_mac_offset);
684
685 if (pkt_dev->flags & F_IPV6) {
686 char b1[128], b2[128];
687 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
688 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
689 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
690 } else
691 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
692 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
693
694 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
695 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
696
697 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
698
699 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
700
701 if (pkt_dev->result[0])
702 seq_printf(seq, "Result: %s\n", pkt_dev->result);
703 else
704 seq_printf(seq, "Result: Idle\n");
705
706 return 0;
707 }
708
709
710 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
711 __u32 *num)
712 {
713 int i = 0;
714 *num = 0;
715
716 for (; i < maxlen; i++) {
717 char c;
718 *num <<= 4;
719 if (get_user(c, &user_buffer[i]))
720 return -EFAULT;
721 if ((c >= '0') && (c <= '9'))
722 *num |= c - '0';
723 else if ((c >= 'a') && (c <= 'f'))
724 *num |= c - 'a' + 10;
725 else if ((c >= 'A') && (c <= 'F'))
726 *num |= c - 'A' + 10;
727 else
728 break;
729 }
730 return i;
731 }
732
733 static int count_trail_chars(const char __user * user_buffer,
734 unsigned int maxlen)
735 {
736 int i;
737
738 for (i = 0; i < maxlen; i++) {
739 char c;
740 if (get_user(c, &user_buffer[i]))
741 return -EFAULT;
742 switch (c) {
743 case '\"':
744 case '\n':
745 case '\r':
746 case '\t':
747 case ' ':
748 case '=':
749 break;
750 default:
751 goto done;
752 }
753 }
754 done:
755 return i;
756 }
757
758 static unsigned long num_arg(const char __user * user_buffer,
759 unsigned long maxlen, unsigned long *num)
760 {
761 int i = 0;
762 *num = 0;
763
764 for (; i < maxlen; i++) {
765 char c;
766 if (get_user(c, &user_buffer[i]))
767 return -EFAULT;
768 if ((c >= '0') && (c <= '9')) {
769 *num *= 10;
770 *num += c - '0';
771 } else
772 break;
773 }
774 return i;
775 }
776
777 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
778 {
779 int i = 0;
780
781 for (; i < maxlen; i++) {
782 char c;
783 if (get_user(c, &user_buffer[i]))
784 return -EFAULT;
785 switch (c) {
786 case '\"':
787 case '\n':
788 case '\r':
789 case '\t':
790 case ' ':
791 goto done_str;
792 break;
793 default:
794 break;
795 }
796 }
797 done_str:
798 return i;
799 }
800
801 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
802 {
803 unsigned n = 0;
804 char c;
805 ssize_t i = 0;
806 int len;
807
808 pkt_dev->nr_labels = 0;
809 do {
810 __u32 tmp;
811 len = hex32_arg(&buffer[i], 8, &tmp);
812 if (len <= 0)
813 return len;
814 pkt_dev->labels[n] = htonl(tmp);
815 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
816 pkt_dev->flags |= F_MPLS_RND;
817 i += len;
818 if (get_user(c, &buffer[i]))
819 return -EFAULT;
820 i++;
821 n++;
822 if (n >= MAX_MPLS_LABELS)
823 return -E2BIG;
824 } while (c == ',');
825
826 pkt_dev->nr_labels = n;
827 return i;
828 }
829
830 static ssize_t pktgen_if_write(struct file *file,
831 const char __user * user_buffer, size_t count,
832 loff_t * offset)
833 {
834 struct seq_file *seq = (struct seq_file *)file->private_data;
835 struct pktgen_dev *pkt_dev = seq->private;
836 int i = 0, max, len;
837 char name[16], valstr[32];
838 unsigned long value = 0;
839 char *pg_result = NULL;
840 int tmp = 0;
841 char buf[128];
842
843 pg_result = &(pkt_dev->result[0]);
844
845 if (count < 1) {
846 printk(KERN_WARNING "pktgen: wrong command format\n");
847 return -EINVAL;
848 }
849
850 max = count - i;
851 tmp = count_trail_chars(&user_buffer[i], max);
852 if (tmp < 0) {
853 printk(KERN_WARNING "pktgen: illegal format\n");
854 return tmp;
855 }
856 i += tmp;
857
858 /* Read variable name */
859
860 len = strn_len(&user_buffer[i], sizeof(name) - 1);
861 if (len < 0)
862 return len;
863
864 memset(name, 0, sizeof(name));
865 if (copy_from_user(name, &user_buffer[i], len))
866 return -EFAULT;
867 i += len;
868
869 max = count - i;
870 len = count_trail_chars(&user_buffer[i], max);
871 if (len < 0)
872 return len;
873
874 i += len;
875
876 if (debug) {
877 char tb[count + 1];
878 if (copy_from_user(tb, user_buffer, count))
879 return -EFAULT;
880 tb[count] = 0;
881 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name,
882 (unsigned long)count, tb);
883 }
884
885 if (!strcmp(name, "min_pkt_size")) {
886 len = num_arg(&user_buffer[i], 10, &value);
887 if (len < 0)
888 return len;
889
890 i += len;
891 if (value < 14 + 20 + 8)
892 value = 14 + 20 + 8;
893 if (value != pkt_dev->min_pkt_size) {
894 pkt_dev->min_pkt_size = value;
895 pkt_dev->cur_pkt_size = value;
896 }
897 sprintf(pg_result, "OK: min_pkt_size=%u",
898 pkt_dev->min_pkt_size);
899 return count;
900 }
901
902 if (!strcmp(name, "max_pkt_size")) {
903 len = num_arg(&user_buffer[i], 10, &value);
904 if (len < 0)
905 return len;
906
907 i += len;
908 if (value < 14 + 20 + 8)
909 value = 14 + 20 + 8;
910 if (value != pkt_dev->max_pkt_size) {
911 pkt_dev->max_pkt_size = value;
912 pkt_dev->cur_pkt_size = value;
913 }
914 sprintf(pg_result, "OK: max_pkt_size=%u",
915 pkt_dev->max_pkt_size);
916 return count;
917 }
918
919 /* Shortcut for min = max */
920
921 if (!strcmp(name, "pkt_size")) {
922 len = num_arg(&user_buffer[i], 10, &value);
923 if (len < 0)
924 return len;
925
926 i += len;
927 if (value < 14 + 20 + 8)
928 value = 14 + 20 + 8;
929 if (value != pkt_dev->min_pkt_size) {
930 pkt_dev->min_pkt_size = value;
931 pkt_dev->max_pkt_size = value;
932 pkt_dev->cur_pkt_size = value;
933 }
934 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
935 return count;
936 }
937
938 if (!strcmp(name, "debug")) {
939 len = num_arg(&user_buffer[i], 10, &value);
940 if (len < 0)
941 return len;
942
943 i += len;
944 debug = value;
945 sprintf(pg_result, "OK: debug=%u", debug);
946 return count;
947 }
948
949 if (!strcmp(name, "frags")) {
950 len = num_arg(&user_buffer[i], 10, &value);
951 if (len < 0)
952 return len;
953
954 i += len;
955 pkt_dev->nfrags = value;
956 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
957 return count;
958 }
959 if (!strcmp(name, "delay")) {
960 len = num_arg(&user_buffer[i], 10, &value);
961 if (len < 0)
962 return len;
963
964 i += len;
965 if (value == 0x7FFFFFFF)
966 pkt_dev->delay = ULLONG_MAX;
967 else
968 pkt_dev->delay = (u64)value;
969
970 sprintf(pg_result, "OK: delay=%llu",
971 (unsigned long long) pkt_dev->delay);
972 return count;
973 }
974 if (!strcmp(name, "udp_src_min")) {
975 len = num_arg(&user_buffer[i], 10, &value);
976 if (len < 0)
977 return len;
978
979 i += len;
980 if (value != pkt_dev->udp_src_min) {
981 pkt_dev->udp_src_min = value;
982 pkt_dev->cur_udp_src = value;
983 }
984 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
985 return count;
986 }
987 if (!strcmp(name, "udp_dst_min")) {
988 len = num_arg(&user_buffer[i], 10, &value);
989 if (len < 0)
990 return len;
991
992 i += len;
993 if (value != pkt_dev->udp_dst_min) {
994 pkt_dev->udp_dst_min = value;
995 pkt_dev->cur_udp_dst = value;
996 }
997 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
998 return count;
999 }
1000 if (!strcmp(name, "udp_src_max")) {
1001 len = num_arg(&user_buffer[i], 10, &value);
1002 if (len < 0)
1003 return len;
1004
1005 i += len;
1006 if (value != pkt_dev->udp_src_max) {
1007 pkt_dev->udp_src_max = value;
1008 pkt_dev->cur_udp_src = value;
1009 }
1010 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1011 return count;
1012 }
1013 if (!strcmp(name, "udp_dst_max")) {
1014 len = num_arg(&user_buffer[i], 10, &value);
1015 if (len < 0)
1016 return len;
1017
1018 i += len;
1019 if (value != pkt_dev->udp_dst_max) {
1020 pkt_dev->udp_dst_max = value;
1021 pkt_dev->cur_udp_dst = value;
1022 }
1023 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1024 return count;
1025 }
1026 if (!strcmp(name, "clone_skb")) {
1027 len = num_arg(&user_buffer[i], 10, &value);
1028 if (len < 0)
1029 return len;
1030
1031 i += len;
1032 pkt_dev->clone_skb = value;
1033
1034 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1035 return count;
1036 }
1037 if (!strcmp(name, "count")) {
1038 len = num_arg(&user_buffer[i], 10, &value);
1039 if (len < 0)
1040 return len;
1041
1042 i += len;
1043 pkt_dev->count = value;
1044 sprintf(pg_result, "OK: count=%llu",
1045 (unsigned long long)pkt_dev->count);
1046 return count;
1047 }
1048 if (!strcmp(name, "src_mac_count")) {
1049 len = num_arg(&user_buffer[i], 10, &value);
1050 if (len < 0)
1051 return len;
1052
1053 i += len;
1054 if (pkt_dev->src_mac_count != value) {
1055 pkt_dev->src_mac_count = value;
1056 pkt_dev->cur_src_mac_offset = 0;
1057 }
1058 sprintf(pg_result, "OK: src_mac_count=%d",
1059 pkt_dev->src_mac_count);
1060 return count;
1061 }
1062 if (!strcmp(name, "dst_mac_count")) {
1063 len = num_arg(&user_buffer[i], 10, &value);
1064 if (len < 0)
1065 return len;
1066
1067 i += len;
1068 if (pkt_dev->dst_mac_count != value) {
1069 pkt_dev->dst_mac_count = value;
1070 pkt_dev->cur_dst_mac_offset = 0;
1071 }
1072 sprintf(pg_result, "OK: dst_mac_count=%d",
1073 pkt_dev->dst_mac_count);
1074 return count;
1075 }
1076 if (!strcmp(name, "flag")) {
1077 char f[32];
1078 memset(f, 0, 32);
1079 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1080 if (len < 0)
1081 return len;
1082
1083 if (copy_from_user(f, &user_buffer[i], len))
1084 return -EFAULT;
1085 i += len;
1086 if (strcmp(f, "IPSRC_RND") == 0)
1087 pkt_dev->flags |= F_IPSRC_RND;
1088
1089 else if (strcmp(f, "!IPSRC_RND") == 0)
1090 pkt_dev->flags &= ~F_IPSRC_RND;
1091
1092 else if (strcmp(f, "TXSIZE_RND") == 0)
1093 pkt_dev->flags |= F_TXSIZE_RND;
1094
1095 else if (strcmp(f, "!TXSIZE_RND") == 0)
1096 pkt_dev->flags &= ~F_TXSIZE_RND;
1097
1098 else if (strcmp(f, "IPDST_RND") == 0)
1099 pkt_dev->flags |= F_IPDST_RND;
1100
1101 else if (strcmp(f, "!IPDST_RND") == 0)
1102 pkt_dev->flags &= ~F_IPDST_RND;
1103
1104 else if (strcmp(f, "UDPSRC_RND") == 0)
1105 pkt_dev->flags |= F_UDPSRC_RND;
1106
1107 else if (strcmp(f, "!UDPSRC_RND") == 0)
1108 pkt_dev->flags &= ~F_UDPSRC_RND;
1109
1110 else if (strcmp(f, "UDPDST_RND") == 0)
1111 pkt_dev->flags |= F_UDPDST_RND;
1112
1113 else if (strcmp(f, "!UDPDST_RND") == 0)
1114 pkt_dev->flags &= ~F_UDPDST_RND;
1115
1116 else if (strcmp(f, "MACSRC_RND") == 0)
1117 pkt_dev->flags |= F_MACSRC_RND;
1118
1119 else if (strcmp(f, "!MACSRC_RND") == 0)
1120 pkt_dev->flags &= ~F_MACSRC_RND;
1121
1122 else if (strcmp(f, "MACDST_RND") == 0)
1123 pkt_dev->flags |= F_MACDST_RND;
1124
1125 else if (strcmp(f, "!MACDST_RND") == 0)
1126 pkt_dev->flags &= ~F_MACDST_RND;
1127
1128 else if (strcmp(f, "MPLS_RND") == 0)
1129 pkt_dev->flags |= F_MPLS_RND;
1130
1131 else if (strcmp(f, "!MPLS_RND") == 0)
1132 pkt_dev->flags &= ~F_MPLS_RND;
1133
1134 else if (strcmp(f, "VID_RND") == 0)
1135 pkt_dev->flags |= F_VID_RND;
1136
1137 else if (strcmp(f, "!VID_RND") == 0)
1138 pkt_dev->flags &= ~F_VID_RND;
1139
1140 else if (strcmp(f, "SVID_RND") == 0)
1141 pkt_dev->flags |= F_SVID_RND;
1142
1143 else if (strcmp(f, "!SVID_RND") == 0)
1144 pkt_dev->flags &= ~F_SVID_RND;
1145
1146 else if (strcmp(f, "FLOW_SEQ") == 0)
1147 pkt_dev->flags |= F_FLOW_SEQ;
1148
1149 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1150 pkt_dev->flags |= F_QUEUE_MAP_RND;
1151
1152 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1153 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1154
1155 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1156 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1157
1158 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1159 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1160 #ifdef CONFIG_XFRM
1161 else if (strcmp(f, "IPSEC") == 0)
1162 pkt_dev->flags |= F_IPSEC_ON;
1163 #endif
1164
1165 else if (strcmp(f, "!IPV6") == 0)
1166 pkt_dev->flags &= ~F_IPV6;
1167
1168 else {
1169 sprintf(pg_result,
1170 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1171 f,
1172 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1173 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC\n");
1174 return count;
1175 }
1176 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1177 return count;
1178 }
1179 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1180 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1181 if (len < 0)
1182 return len;
1183
1184 if (copy_from_user(buf, &user_buffer[i], len))
1185 return -EFAULT;
1186 buf[len] = 0;
1187 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1188 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1189 strncpy(pkt_dev->dst_min, buf, len);
1190 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1191 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1192 }
1193 if (debug)
1194 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1195 pkt_dev->dst_min);
1196 i += len;
1197 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1198 return count;
1199 }
1200 if (!strcmp(name, "dst_max")) {
1201 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1202 if (len < 0)
1203 return len;
1204
1205
1206 if (copy_from_user(buf, &user_buffer[i], len))
1207 return -EFAULT;
1208
1209 buf[len] = 0;
1210 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1211 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1212 strncpy(pkt_dev->dst_max, buf, len);
1213 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1214 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1215 }
1216 if (debug)
1217 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1218 pkt_dev->dst_max);
1219 i += len;
1220 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1221 return count;
1222 }
1223 if (!strcmp(name, "dst6")) {
1224 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1225 if (len < 0)
1226 return len;
1227
1228 pkt_dev->flags |= F_IPV6;
1229
1230 if (copy_from_user(buf, &user_buffer[i], len))
1231 return -EFAULT;
1232 buf[len] = 0;
1233
1234 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1235 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1236
1237 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1238
1239 if (debug)
1240 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1241
1242 i += len;
1243 sprintf(pg_result, "OK: dst6=%s", buf);
1244 return count;
1245 }
1246 if (!strcmp(name, "dst6_min")) {
1247 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1248 if (len < 0)
1249 return len;
1250
1251 pkt_dev->flags |= F_IPV6;
1252
1253 if (copy_from_user(buf, &user_buffer[i], len))
1254 return -EFAULT;
1255 buf[len] = 0;
1256
1257 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1258 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1259
1260 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1261 &pkt_dev->min_in6_daddr);
1262 if (debug)
1263 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1264
1265 i += len;
1266 sprintf(pg_result, "OK: dst6_min=%s", buf);
1267 return count;
1268 }
1269 if (!strcmp(name, "dst6_max")) {
1270 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1271 if (len < 0)
1272 return len;
1273
1274 pkt_dev->flags |= F_IPV6;
1275
1276 if (copy_from_user(buf, &user_buffer[i], len))
1277 return -EFAULT;
1278 buf[len] = 0;
1279
1280 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1281 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1282
1283 if (debug)
1284 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1285
1286 i += len;
1287 sprintf(pg_result, "OK: dst6_max=%s", buf);
1288 return count;
1289 }
1290 if (!strcmp(name, "src6")) {
1291 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1292 if (len < 0)
1293 return len;
1294
1295 pkt_dev->flags |= F_IPV6;
1296
1297 if (copy_from_user(buf, &user_buffer[i], len))
1298 return -EFAULT;
1299 buf[len] = 0;
1300
1301 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1302 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1303
1304 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1305
1306 if (debug)
1307 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1308
1309 i += len;
1310 sprintf(pg_result, "OK: src6=%s", buf);
1311 return count;
1312 }
1313 if (!strcmp(name, "src_min")) {
1314 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1315 if (len < 0)
1316 return len;
1317
1318 if (copy_from_user(buf, &user_buffer[i], len))
1319 return -EFAULT;
1320 buf[len] = 0;
1321 if (strcmp(buf, pkt_dev->src_min) != 0) {
1322 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1323 strncpy(pkt_dev->src_min, buf, len);
1324 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1325 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1326 }
1327 if (debug)
1328 printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1329 pkt_dev->src_min);
1330 i += len;
1331 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1332 return count;
1333 }
1334 if (!strcmp(name, "src_max")) {
1335 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1336 if (len < 0)
1337 return len;
1338
1339 if (copy_from_user(buf, &user_buffer[i], len))
1340 return -EFAULT;
1341 buf[len] = 0;
1342 if (strcmp(buf, pkt_dev->src_max) != 0) {
1343 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1344 strncpy(pkt_dev->src_max, buf, len);
1345 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1346 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1347 }
1348 if (debug)
1349 printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1350 pkt_dev->src_max);
1351 i += len;
1352 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1353 return count;
1354 }
1355 if (!strcmp(name, "dst_mac")) {
1356 char *v = valstr;
1357 unsigned char old_dmac[ETH_ALEN];
1358 unsigned char *m = pkt_dev->dst_mac;
1359 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1360
1361 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1362 if (len < 0)
1363 return len;
1364
1365 memset(valstr, 0, sizeof(valstr));
1366 if (copy_from_user(valstr, &user_buffer[i], len))
1367 return -EFAULT;
1368 i += len;
1369
1370 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1371 if (*v >= '0' && *v <= '9') {
1372 *m *= 16;
1373 *m += *v - '0';
1374 }
1375 if (*v >= 'A' && *v <= 'F') {
1376 *m *= 16;
1377 *m += *v - 'A' + 10;
1378 }
1379 if (*v >= 'a' && *v <= 'f') {
1380 *m *= 16;
1381 *m += *v - 'a' + 10;
1382 }
1383 if (*v == ':') {
1384 m++;
1385 *m = 0;
1386 }
1387 }
1388
1389 /* Set up Dest MAC */
1390 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1391 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1392
1393 sprintf(pg_result, "OK: dstmac");
1394 return count;
1395 }
1396 if (!strcmp(name, "src_mac")) {
1397 char *v = valstr;
1398 unsigned char old_smac[ETH_ALEN];
1399 unsigned char *m = pkt_dev->src_mac;
1400
1401 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN);
1402
1403 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1404 if (len < 0)
1405 return len;
1406
1407 memset(valstr, 0, sizeof(valstr));
1408 if (copy_from_user(valstr, &user_buffer[i], len))
1409 return -EFAULT;
1410 i += len;
1411
1412 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1413 if (*v >= '0' && *v <= '9') {
1414 *m *= 16;
1415 *m += *v - '0';
1416 }
1417 if (*v >= 'A' && *v <= 'F') {
1418 *m *= 16;
1419 *m += *v - 'A' + 10;
1420 }
1421 if (*v >= 'a' && *v <= 'f') {
1422 *m *= 16;
1423 *m += *v - 'a' + 10;
1424 }
1425 if (*v == ':') {
1426 m++;
1427 *m = 0;
1428 }
1429 }
1430
1431 /* Set up Src MAC */
1432 if (compare_ether_addr(old_smac, pkt_dev->src_mac))
1433 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN);
1434
1435 sprintf(pg_result, "OK: srcmac");
1436 return count;
1437 }
1438
1439 if (!strcmp(name, "clear_counters")) {
1440 pktgen_clear_counters(pkt_dev);
1441 sprintf(pg_result, "OK: Clearing counters.\n");
1442 return count;
1443 }
1444
1445 if (!strcmp(name, "flows")) {
1446 len = num_arg(&user_buffer[i], 10, &value);
1447 if (len < 0)
1448 return len;
1449
1450 i += len;
1451 if (value > MAX_CFLOWS)
1452 value = MAX_CFLOWS;
1453
1454 pkt_dev->cflows = value;
1455 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1456 return count;
1457 }
1458
1459 if (!strcmp(name, "flowlen")) {
1460 len = num_arg(&user_buffer[i], 10, &value);
1461 if (len < 0)
1462 return len;
1463
1464 i += len;
1465 pkt_dev->lflow = value;
1466 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1467 return count;
1468 }
1469
1470 if (!strcmp(name, "queue_map_min")) {
1471 len = num_arg(&user_buffer[i], 5, &value);
1472 if (len < 0)
1473 return len;
1474
1475 i += len;
1476 pkt_dev->queue_map_min = value;
1477 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1478 return count;
1479 }
1480
1481 if (!strcmp(name, "queue_map_max")) {
1482 len = num_arg(&user_buffer[i], 5, &value);
1483 if (len < 0)
1484 return len;
1485
1486 i += len;
1487 pkt_dev->queue_map_max = value;
1488 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1489 return count;
1490 }
1491
1492 if (!strcmp(name, "mpls")) {
1493 unsigned n, cnt;
1494
1495 len = get_labels(&user_buffer[i], pkt_dev);
1496 if (len < 0)
1497 return len;
1498 i += len;
1499 cnt = sprintf(pg_result, "OK: mpls=");
1500 for (n = 0; n < pkt_dev->nr_labels; n++)
1501 cnt += sprintf(pg_result + cnt,
1502 "%08x%s", ntohl(pkt_dev->labels[n]),
1503 n == pkt_dev->nr_labels-1 ? "" : ",");
1504
1505 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1506 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1507 pkt_dev->svlan_id = 0xffff;
1508
1509 if (debug)
1510 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1511 }
1512 return count;
1513 }
1514
1515 if (!strcmp(name, "vlan_id")) {
1516 len = num_arg(&user_buffer[i], 4, &value);
1517 if (len < 0)
1518 return len;
1519
1520 i += len;
1521 if (value <= 4095) {
1522 pkt_dev->vlan_id = value; /* turn on VLAN */
1523
1524 if (debug)
1525 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1526
1527 if (debug && pkt_dev->nr_labels)
1528 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1529
1530 pkt_dev->nr_labels = 0; /* turn off MPLS */
1531 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1532 } else {
1533 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1534 pkt_dev->svlan_id = 0xffff;
1535
1536 if (debug)
1537 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1538 }
1539 return count;
1540 }
1541
1542 if (!strcmp(name, "vlan_p")) {
1543 len = num_arg(&user_buffer[i], 1, &value);
1544 if (len < 0)
1545 return len;
1546
1547 i += len;
1548 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1549 pkt_dev->vlan_p = value;
1550 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1551 } else {
1552 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1553 }
1554 return count;
1555 }
1556
1557 if (!strcmp(name, "vlan_cfi")) {
1558 len = num_arg(&user_buffer[i], 1, &value);
1559 if (len < 0)
1560 return len;
1561
1562 i += len;
1563 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1564 pkt_dev->vlan_cfi = value;
1565 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1566 } else {
1567 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1568 }
1569 return count;
1570 }
1571
1572 if (!strcmp(name, "svlan_id")) {
1573 len = num_arg(&user_buffer[i], 4, &value);
1574 if (len < 0)
1575 return len;
1576
1577 i += len;
1578 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1579 pkt_dev->svlan_id = value; /* turn on SVLAN */
1580
1581 if (debug)
1582 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1583
1584 if (debug && pkt_dev->nr_labels)
1585 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1586
1587 pkt_dev->nr_labels = 0; /* turn off MPLS */
1588 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1589 } else {
1590 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1591 pkt_dev->svlan_id = 0xffff;
1592
1593 if (debug)
1594 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1595 }
1596 return count;
1597 }
1598
1599 if (!strcmp(name, "svlan_p")) {
1600 len = num_arg(&user_buffer[i], 1, &value);
1601 if (len < 0)
1602 return len;
1603
1604 i += len;
1605 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1606 pkt_dev->svlan_p = value;
1607 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1608 } else {
1609 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1610 }
1611 return count;
1612 }
1613
1614 if (!strcmp(name, "svlan_cfi")) {
1615 len = num_arg(&user_buffer[i], 1, &value);
1616 if (len < 0)
1617 return len;
1618
1619 i += len;
1620 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1621 pkt_dev->svlan_cfi = value;
1622 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1623 } else {
1624 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1625 }
1626 return count;
1627 }
1628
1629 if (!strcmp(name, "tos")) {
1630 __u32 tmp_value = 0;
1631 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1632 if (len < 0)
1633 return len;
1634
1635 i += len;
1636 if (len == 2) {
1637 pkt_dev->tos = tmp_value;
1638 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1639 } else {
1640 sprintf(pg_result, "ERROR: tos must be 00-ff");
1641 }
1642 return count;
1643 }
1644
1645 if (!strcmp(name, "traffic_class")) {
1646 __u32 tmp_value = 0;
1647 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1648 if (len < 0)
1649 return len;
1650
1651 i += len;
1652 if (len == 2) {
1653 pkt_dev->traffic_class = tmp_value;
1654 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1655 } else {
1656 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1657 }
1658 return count;
1659 }
1660
1661 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1662 return -EINVAL;
1663 }
1664
1665 static int pktgen_if_open(struct inode *inode, struct file *file)
1666 {
1667 return single_open(file, pktgen_if_show, PDE(inode)->data);
1668 }
1669
1670 static const struct file_operations pktgen_if_fops = {
1671 .owner = THIS_MODULE,
1672 .open = pktgen_if_open,
1673 .read = seq_read,
1674 .llseek = seq_lseek,
1675 .write = pktgen_if_write,
1676 .release = single_release,
1677 };
1678
1679 static int pktgen_thread_show(struct seq_file *seq, void *v)
1680 {
1681 struct pktgen_thread *t = seq->private;
1682 const struct pktgen_dev *pkt_dev;
1683
1684 BUG_ON(!t);
1685
1686 seq_printf(seq, "Running: ");
1687
1688 if_lock(t);
1689 list_for_each_entry(pkt_dev, &t->if_list, list)
1690 if (pkt_dev->running)
1691 seq_printf(seq, "%s ", pkt_dev->odev->name);
1692
1693 seq_printf(seq, "\nStopped: ");
1694
1695 list_for_each_entry(pkt_dev, &t->if_list, list)
1696 if (!pkt_dev->running)
1697 seq_printf(seq, "%s ", pkt_dev->odev->name);
1698
1699 if (t->result[0])
1700 seq_printf(seq, "\nResult: %s\n", t->result);
1701 else
1702 seq_printf(seq, "\nResult: NA\n");
1703
1704 if_unlock(t);
1705
1706 return 0;
1707 }
1708
1709 static ssize_t pktgen_thread_write(struct file *file,
1710 const char __user * user_buffer,
1711 size_t count, loff_t * offset)
1712 {
1713 struct seq_file *seq = (struct seq_file *)file->private_data;
1714 struct pktgen_thread *t = seq->private;
1715 int i = 0, max, len, ret;
1716 char name[40];
1717 char *pg_result;
1718
1719 if (count < 1) {
1720 // sprintf(pg_result, "Wrong command format");
1721 return -EINVAL;
1722 }
1723
1724 max = count - i;
1725 len = count_trail_chars(&user_buffer[i], max);
1726 if (len < 0)
1727 return len;
1728
1729 i += len;
1730
1731 /* Read variable name */
1732
1733 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1734 if (len < 0)
1735 return len;
1736
1737 memset(name, 0, sizeof(name));
1738 if (copy_from_user(name, &user_buffer[i], len))
1739 return -EFAULT;
1740 i += len;
1741
1742 max = count - i;
1743 len = count_trail_chars(&user_buffer[i], max);
1744 if (len < 0)
1745 return len;
1746
1747 i += len;
1748
1749 if (debug)
1750 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1751 name, (unsigned long)count);
1752
1753 if (!t) {
1754 printk(KERN_ERR "pktgen: ERROR: No thread\n");
1755 ret = -EINVAL;
1756 goto out;
1757 }
1758
1759 pg_result = &(t->result[0]);
1760
1761 if (!strcmp(name, "add_device")) {
1762 char f[32];
1763 memset(f, 0, 32);
1764 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1765 if (len < 0) {
1766 ret = len;
1767 goto out;
1768 }
1769 if (copy_from_user(f, &user_buffer[i], len))
1770 return -EFAULT;
1771 i += len;
1772 mutex_lock(&pktgen_thread_lock);
1773 pktgen_add_device(t, f);
1774 mutex_unlock(&pktgen_thread_lock);
1775 ret = count;
1776 sprintf(pg_result, "OK: add_device=%s", f);
1777 goto out;
1778 }
1779
1780 if (!strcmp(name, "rem_device_all")) {
1781 mutex_lock(&pktgen_thread_lock);
1782 t->control |= T_REMDEVALL;
1783 mutex_unlock(&pktgen_thread_lock);
1784 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1785 ret = count;
1786 sprintf(pg_result, "OK: rem_device_all");
1787 goto out;
1788 }
1789
1790 if (!strcmp(name, "max_before_softirq")) {
1791 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1792 ret = count;
1793 goto out;
1794 }
1795
1796 ret = -EINVAL;
1797 out:
1798 return ret;
1799 }
1800
1801 static int pktgen_thread_open(struct inode *inode, struct file *file)
1802 {
1803 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1804 }
1805
1806 static const struct file_operations pktgen_thread_fops = {
1807 .owner = THIS_MODULE,
1808 .open = pktgen_thread_open,
1809 .read = seq_read,
1810 .llseek = seq_lseek,
1811 .write = pktgen_thread_write,
1812 .release = single_release,
1813 };
1814
1815 /* Think find or remove for NN */
1816 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1817 {
1818 struct pktgen_thread *t;
1819 struct pktgen_dev *pkt_dev = NULL;
1820
1821 list_for_each_entry(t, &pktgen_threads, th_list) {
1822 pkt_dev = pktgen_find_dev(t, ifname);
1823 if (pkt_dev) {
1824 if (remove) {
1825 if_lock(t);
1826 pkt_dev->removal_mark = 1;
1827 t->control |= T_REMDEV;
1828 if_unlock(t);
1829 }
1830 break;
1831 }
1832 }
1833 return pkt_dev;
1834 }
1835
1836 /*
1837 * mark a device for removal
1838 */
1839 static void pktgen_mark_device(const char *ifname)
1840 {
1841 struct pktgen_dev *pkt_dev = NULL;
1842 const int max_tries = 10, msec_per_try = 125;
1843 int i = 0;
1844
1845 mutex_lock(&pktgen_thread_lock);
1846 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname);
1847
1848 while (1) {
1849
1850 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1851 if (pkt_dev == NULL)
1852 break; /* success */
1853
1854 mutex_unlock(&pktgen_thread_lock);
1855 pr_debug("pktgen: pktgen_mark_device waiting for %s "
1856 "to disappear....\n", ifname);
1857 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1858 mutex_lock(&pktgen_thread_lock);
1859
1860 if (++i >= max_tries) {
1861 printk(KERN_ERR "pktgen_mark_device: timed out after "
1862 "waiting %d msec for device %s to be removed\n",
1863 msec_per_try * i, ifname);
1864 break;
1865 }
1866
1867 }
1868
1869 mutex_unlock(&pktgen_thread_lock);
1870 }
1871
1872 static void pktgen_change_name(struct net_device *dev)
1873 {
1874 struct pktgen_thread *t;
1875
1876 list_for_each_entry(t, &pktgen_threads, th_list) {
1877 struct pktgen_dev *pkt_dev;
1878
1879 list_for_each_entry(pkt_dev, &t->if_list, list) {
1880 if (pkt_dev->odev != dev)
1881 continue;
1882
1883 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1884
1885 pkt_dev->entry = proc_create_data(dev->name, 0600,
1886 pg_proc_dir,
1887 &pktgen_if_fops,
1888 pkt_dev);
1889 if (!pkt_dev->entry)
1890 printk(KERN_ERR "pktgen: can't move proc "
1891 " entry for '%s'\n", dev->name);
1892 break;
1893 }
1894 }
1895 }
1896
1897 static int pktgen_device_event(struct notifier_block *unused,
1898 unsigned long event, void *ptr)
1899 {
1900 struct net_device *dev = ptr;
1901
1902 if (!net_eq(dev_net(dev), &init_net))
1903 return NOTIFY_DONE;
1904
1905 /* It is OK that we do not hold the group lock right now,
1906 * as we run under the RTNL lock.
1907 */
1908
1909 switch (event) {
1910 case NETDEV_CHANGENAME:
1911 pktgen_change_name(dev);
1912 break;
1913
1914 case NETDEV_UNREGISTER:
1915 pktgen_mark_device(dev->name);
1916 break;
1917 }
1918
1919 return NOTIFY_DONE;
1920 }
1921
1922 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev,
1923 const char *ifname)
1924 {
1925 char b[IFNAMSIZ+5];
1926 int i = 0;
1927
1928 for (i = 0; ifname[i] != '@'; i++) {
1929 if (i == IFNAMSIZ)
1930 break;
1931
1932 b[i] = ifname[i];
1933 }
1934 b[i] = 0;
1935
1936 return dev_get_by_name(&init_net, b);
1937 }
1938
1939
1940 /* Associate pktgen_dev with a device. */
1941
1942 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1943 {
1944 struct net_device *odev;
1945 int err;
1946
1947 /* Clean old setups */
1948 if (pkt_dev->odev) {
1949 dev_put(pkt_dev->odev);
1950 pkt_dev->odev = NULL;
1951 }
1952
1953 odev = pktgen_dev_get_by_name(pkt_dev, ifname);
1954 if (!odev) {
1955 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname);
1956 return -ENODEV;
1957 }
1958
1959 if (odev->type != ARPHRD_ETHER) {
1960 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname);
1961 err = -EINVAL;
1962 } else if (!netif_running(odev)) {
1963 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname);
1964 err = -ENETDOWN;
1965 } else {
1966 pkt_dev->odev = odev;
1967 return 0;
1968 }
1969
1970 dev_put(odev);
1971 return err;
1972 }
1973
1974 /* Read pkt_dev from the interface and set up internal pktgen_dev
1975 * structure to have the right information to create/send packets
1976 */
1977 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
1978 {
1979 int ntxq;
1980
1981 if (!pkt_dev->odev) {
1982 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in "
1983 "setup_inject.\n");
1984 sprintf(pkt_dev->result,
1985 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1986 return;
1987 }
1988
1989 /* make sure that we don't pick a non-existing transmit queue */
1990 ntxq = pkt_dev->odev->real_num_tx_queues;
1991
1992 if (ntxq <= pkt_dev->queue_map_min) {
1993 printk(KERN_WARNING "pktgen: WARNING: Requested "
1994 "queue_map_min (zero-based) (%d) exceeds valid range "
1995 "[0 - %d] for (%d) queues on %s, resetting\n",
1996 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
1997 pkt_dev->odev->name);
1998 pkt_dev->queue_map_min = ntxq - 1;
1999 }
2000 if (pkt_dev->queue_map_max >= ntxq) {
2001 printk(KERN_WARNING "pktgen: WARNING: Requested "
2002 "queue_map_max (zero-based) (%d) exceeds valid range "
2003 "[0 - %d] for (%d) queues on %s, resetting\n",
2004 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2005 pkt_dev->odev->name);
2006 pkt_dev->queue_map_max = ntxq - 1;
2007 }
2008
2009 /* Default to the interface's mac if not explicitly set. */
2010
2011 if (is_zero_ether_addr(pkt_dev->src_mac))
2012 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2013
2014 /* Set up Dest MAC */
2015 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2016
2017 /* Set up pkt size */
2018 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2019
2020 if (pkt_dev->flags & F_IPV6) {
2021 /*
2022 * Skip this automatic address setting until locks or functions
2023 * gets exported
2024 */
2025
2026 #ifdef NOTNOW
2027 int i, set = 0, err = 1;
2028 struct inet6_dev *idev;
2029
2030 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2031 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2032 set = 1;
2033 break;
2034 }
2035
2036 if (!set) {
2037
2038 /*
2039 * Use linklevel address if unconfigured.
2040 *
2041 * use ipv6_get_lladdr if/when it's get exported
2042 */
2043
2044 rcu_read_lock();
2045 idev = __in6_dev_get(pkt_dev->odev);
2046 if (idev) {
2047 struct inet6_ifaddr *ifp;
2048
2049 read_lock_bh(&idev->lock);
2050 for (ifp = idev->addr_list; ifp;
2051 ifp = ifp->if_next) {
2052 if (ifp->scope == IFA_LINK
2053 && !(ifp->
2054 flags & IFA_F_TENTATIVE)) {
2055 ipv6_addr_copy(&pkt_dev->
2056 cur_in6_saddr,
2057 &ifp->addr);
2058 err = 0;
2059 break;
2060 }
2061 }
2062 read_unlock_bh(&idev->lock);
2063 }
2064 rcu_read_unlock();
2065 if (err)
2066 printk(KERN_ERR "pktgen: ERROR: IPv6 link "
2067 "address not availble.\n");
2068 }
2069 #endif
2070 } else {
2071 pkt_dev->saddr_min = 0;
2072 pkt_dev->saddr_max = 0;
2073 if (strlen(pkt_dev->src_min) == 0) {
2074
2075 struct in_device *in_dev;
2076
2077 rcu_read_lock();
2078 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2079 if (in_dev) {
2080 if (in_dev->ifa_list) {
2081 pkt_dev->saddr_min =
2082 in_dev->ifa_list->ifa_address;
2083 pkt_dev->saddr_max = pkt_dev->saddr_min;
2084 }
2085 }
2086 rcu_read_unlock();
2087 } else {
2088 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2089 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2090 }
2091
2092 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2093 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2094 }
2095 /* Initialize current values. */
2096 pkt_dev->cur_dst_mac_offset = 0;
2097 pkt_dev->cur_src_mac_offset = 0;
2098 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2099 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2100 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2101 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2102 pkt_dev->nflows = 0;
2103 }
2104
2105
2106 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2107 {
2108 ktime_t start_time, end_time;
2109 s64 remaining;
2110 struct hrtimer_sleeper t;
2111
2112 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2113 hrtimer_set_expires(&t.timer, spin_until);
2114
2115 remaining = ktime_to_us(hrtimer_expires_remaining(&t.timer));
2116 if (remaining <= 0) {
2117 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2118 return;
2119 }
2120
2121 start_time = ktime_now();
2122 if (remaining < 100)
2123 udelay(remaining); /* really small just spin */
2124 else {
2125 /* see do_nanosleep */
2126 hrtimer_init_sleeper(&t, current);
2127 do {
2128 set_current_state(TASK_INTERRUPTIBLE);
2129 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2130 if (!hrtimer_active(&t.timer))
2131 t.task = NULL;
2132
2133 if (likely(t.task))
2134 schedule();
2135
2136 hrtimer_cancel(&t.timer);
2137 } while (t.task && pkt_dev->running && !signal_pending(current));
2138 __set_current_state(TASK_RUNNING);
2139 }
2140 end_time = ktime_now();
2141
2142 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2143 pkt_dev->next_tx = ktime_add_ns(end_time, pkt_dev->delay);
2144 }
2145
2146 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2147 {
2148 pkt_dev->pkt_overhead = 0;
2149 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2150 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2151 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2152 }
2153
2154 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2155 {
2156 return !!(pkt_dev->flows[flow].flags & F_INIT);
2157 }
2158
2159 static inline int f_pick(struct pktgen_dev *pkt_dev)
2160 {
2161 int flow = pkt_dev->curfl;
2162
2163 if (pkt_dev->flags & F_FLOW_SEQ) {
2164 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2165 /* reset time */
2166 pkt_dev->flows[flow].count = 0;
2167 pkt_dev->flows[flow].flags = 0;
2168 pkt_dev->curfl += 1;
2169 if (pkt_dev->curfl >= pkt_dev->cflows)
2170 pkt_dev->curfl = 0; /*reset */
2171 }
2172 } else {
2173 flow = random32() % pkt_dev->cflows;
2174 pkt_dev->curfl = flow;
2175
2176 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2177 pkt_dev->flows[flow].count = 0;
2178 pkt_dev->flows[flow].flags = 0;
2179 }
2180 }
2181
2182 return pkt_dev->curfl;
2183 }
2184
2185
2186 #ifdef CONFIG_XFRM
2187 /* If there was already an IPSEC SA, we keep it as is, else
2188 * we go look for it ...
2189 */
2190 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2191 {
2192 struct xfrm_state *x = pkt_dev->flows[flow].x;
2193 if (!x) {
2194 /*slow path: we dont already have xfrm_state*/
2195 x = xfrm_stateonly_find(&init_net,
2196 (xfrm_address_t *)&pkt_dev->cur_daddr,
2197 (xfrm_address_t *)&pkt_dev->cur_saddr,
2198 AF_INET,
2199 pkt_dev->ipsmode,
2200 pkt_dev->ipsproto, 0);
2201 if (x) {
2202 pkt_dev->flows[flow].x = x;
2203 set_pkt_overhead(pkt_dev);
2204 pkt_dev->pkt_overhead += x->props.header_len;
2205 }
2206
2207 }
2208 }
2209 #endif
2210 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2211 {
2212
2213 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2214 pkt_dev->cur_queue_map = smp_processor_id();
2215
2216 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2217 __u16 t;
2218 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2219 t = random32() %
2220 (pkt_dev->queue_map_max -
2221 pkt_dev->queue_map_min + 1)
2222 + pkt_dev->queue_map_min;
2223 } else {
2224 t = pkt_dev->cur_queue_map + 1;
2225 if (t > pkt_dev->queue_map_max)
2226 t = pkt_dev->queue_map_min;
2227 }
2228 pkt_dev->cur_queue_map = t;
2229 }
2230 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2231 }
2232
2233 /* Increment/randomize headers according to flags and current values
2234 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2235 */
2236 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2237 {
2238 __u32 imn;
2239 __u32 imx;
2240 int flow = 0;
2241
2242 if (pkt_dev->cflows)
2243 flow = f_pick(pkt_dev);
2244
2245 /* Deal with source MAC */
2246 if (pkt_dev->src_mac_count > 1) {
2247 __u32 mc;
2248 __u32 tmp;
2249
2250 if (pkt_dev->flags & F_MACSRC_RND)
2251 mc = random32() % pkt_dev->src_mac_count;
2252 else {
2253 mc = pkt_dev->cur_src_mac_offset++;
2254 if (pkt_dev->cur_src_mac_offset >=
2255 pkt_dev->src_mac_count)
2256 pkt_dev->cur_src_mac_offset = 0;
2257 }
2258
2259 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2260 pkt_dev->hh[11] = tmp;
2261 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2262 pkt_dev->hh[10] = tmp;
2263 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2264 pkt_dev->hh[9] = tmp;
2265 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2266 pkt_dev->hh[8] = tmp;
2267 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2268 pkt_dev->hh[7] = tmp;
2269 }
2270
2271 /* Deal with Destination MAC */
2272 if (pkt_dev->dst_mac_count > 1) {
2273 __u32 mc;
2274 __u32 tmp;
2275
2276 if (pkt_dev->flags & F_MACDST_RND)
2277 mc = random32() % pkt_dev->dst_mac_count;
2278
2279 else {
2280 mc = pkt_dev->cur_dst_mac_offset++;
2281 if (pkt_dev->cur_dst_mac_offset >=
2282 pkt_dev->dst_mac_count) {
2283 pkt_dev->cur_dst_mac_offset = 0;
2284 }
2285 }
2286
2287 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2288 pkt_dev->hh[5] = tmp;
2289 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2290 pkt_dev->hh[4] = tmp;
2291 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2292 pkt_dev->hh[3] = tmp;
2293 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2294 pkt_dev->hh[2] = tmp;
2295 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2296 pkt_dev->hh[1] = tmp;
2297 }
2298
2299 if (pkt_dev->flags & F_MPLS_RND) {
2300 unsigned i;
2301 for (i = 0; i < pkt_dev->nr_labels; i++)
2302 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2303 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2304 ((__force __be32)random32() &
2305 htonl(0x000fffff));
2306 }
2307
2308 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2309 pkt_dev->vlan_id = random32() & (4096-1);
2310 }
2311
2312 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2313 pkt_dev->svlan_id = random32() & (4096 - 1);
2314 }
2315
2316 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2317 if (pkt_dev->flags & F_UDPSRC_RND)
2318 pkt_dev->cur_udp_src = random32() %
2319 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2320 + pkt_dev->udp_src_min;
2321
2322 else {
2323 pkt_dev->cur_udp_src++;
2324 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2325 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2326 }
2327 }
2328
2329 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2330 if (pkt_dev->flags & F_UDPDST_RND) {
2331 pkt_dev->cur_udp_dst = random32() %
2332 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2333 + pkt_dev->udp_dst_min;
2334 } else {
2335 pkt_dev->cur_udp_dst++;
2336 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2337 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2338 }
2339 }
2340
2341 if (!(pkt_dev->flags & F_IPV6)) {
2342
2343 imn = ntohl(pkt_dev->saddr_min);
2344 imx = ntohl(pkt_dev->saddr_max);
2345 if (imn < imx) {
2346 __u32 t;
2347 if (pkt_dev->flags & F_IPSRC_RND)
2348 t = random32() % (imx - imn) + imn;
2349 else {
2350 t = ntohl(pkt_dev->cur_saddr);
2351 t++;
2352 if (t > imx)
2353 t = imn;
2354
2355 }
2356 pkt_dev->cur_saddr = htonl(t);
2357 }
2358
2359 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2360 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2361 } else {
2362 imn = ntohl(pkt_dev->daddr_min);
2363 imx = ntohl(pkt_dev->daddr_max);
2364 if (imn < imx) {
2365 __u32 t;
2366 __be32 s;
2367 if (pkt_dev->flags & F_IPDST_RND) {
2368
2369 t = random32() % (imx - imn) + imn;
2370 s = htonl(t);
2371
2372 while (ipv4_is_loopback(s) ||
2373 ipv4_is_multicast(s) ||
2374 ipv4_is_lbcast(s) ||
2375 ipv4_is_zeronet(s) ||
2376 ipv4_is_local_multicast(s)) {
2377 t = random32() % (imx - imn) + imn;
2378 s = htonl(t);
2379 }
2380 pkt_dev->cur_daddr = s;
2381 } else {
2382 t = ntohl(pkt_dev->cur_daddr);
2383 t++;
2384 if (t > imx) {
2385 t = imn;
2386 }
2387 pkt_dev->cur_daddr = htonl(t);
2388 }
2389 }
2390 if (pkt_dev->cflows) {
2391 pkt_dev->flows[flow].flags |= F_INIT;
2392 pkt_dev->flows[flow].cur_daddr =
2393 pkt_dev->cur_daddr;
2394 #ifdef CONFIG_XFRM
2395 if (pkt_dev->flags & F_IPSEC_ON)
2396 get_ipsec_sa(pkt_dev, flow);
2397 #endif
2398 pkt_dev->nflows++;
2399 }
2400 }
2401 } else { /* IPV6 * */
2402
2403 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2404 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2405 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2406 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2407 else {
2408 int i;
2409
2410 /* Only random destinations yet */
2411
2412 for (i = 0; i < 4; i++) {
2413 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2414 (((__force __be32)random32() |
2415 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2416 pkt_dev->max_in6_daddr.s6_addr32[i]);
2417 }
2418 }
2419 }
2420
2421 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2422 __u32 t;
2423 if (pkt_dev->flags & F_TXSIZE_RND) {
2424 t = random32() %
2425 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2426 + pkt_dev->min_pkt_size;
2427 } else {
2428 t = pkt_dev->cur_pkt_size + 1;
2429 if (t > pkt_dev->max_pkt_size)
2430 t = pkt_dev->min_pkt_size;
2431 }
2432 pkt_dev->cur_pkt_size = t;
2433 }
2434
2435 set_cur_queue_map(pkt_dev);
2436
2437 pkt_dev->flows[flow].count++;
2438 }
2439
2440
2441 #ifdef CONFIG_XFRM
2442 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2443 {
2444 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2445 int err = 0;
2446 struct iphdr *iph;
2447
2448 if (!x)
2449 return 0;
2450 /* XXX: we dont support tunnel mode for now until
2451 * we resolve the dst issue */
2452 if (x->props.mode != XFRM_MODE_TRANSPORT)
2453 return 0;
2454
2455 spin_lock(&x->lock);
2456 iph = ip_hdr(skb);
2457
2458 err = x->outer_mode->output(x, skb);
2459 if (err)
2460 goto error;
2461 err = x->type->output(x, skb);
2462 if (err)
2463 goto error;
2464
2465 x->curlft.bytes += skb->len;
2466 x->curlft.packets++;
2467 error:
2468 spin_unlock(&x->lock);
2469 return err;
2470 }
2471
2472 static void free_SAs(struct pktgen_dev *pkt_dev)
2473 {
2474 if (pkt_dev->cflows) {
2475 /* let go of the SAs if we have them */
2476 int i = 0;
2477 for (; i < pkt_dev->cflows; i++) {
2478 struct xfrm_state *x = pkt_dev->flows[i].x;
2479 if (x) {
2480 xfrm_state_put(x);
2481 pkt_dev->flows[i].x = NULL;
2482 }
2483 }
2484 }
2485 }
2486
2487 static int process_ipsec(struct pktgen_dev *pkt_dev,
2488 struct sk_buff *skb, __be16 protocol)
2489 {
2490 if (pkt_dev->flags & F_IPSEC_ON) {
2491 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2492 int nhead = 0;
2493 if (x) {
2494 int ret;
2495 __u8 *eth;
2496 nhead = x->props.header_len - skb_headroom(skb);
2497 if (nhead > 0) {
2498 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2499 if (ret < 0) {
2500 printk(KERN_ERR "Error expanding "
2501 "ipsec packet %d\n", ret);
2502 goto err;
2503 }
2504 }
2505
2506 /* ipsec is not expecting ll header */
2507 skb_pull(skb, ETH_HLEN);
2508 ret = pktgen_output_ipsec(skb, pkt_dev);
2509 if (ret) {
2510 printk(KERN_ERR "Error creating ipsec "
2511 "packet %d\n", ret);
2512 goto err;
2513 }
2514 /* restore ll */
2515 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2516 memcpy(eth, pkt_dev->hh, 12);
2517 *(u16 *) &eth[12] = protocol;
2518 }
2519 }
2520 return 1;
2521 err:
2522 kfree_skb(skb);
2523 return 0;
2524 }
2525 #endif
2526
2527 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2528 {
2529 unsigned i;
2530 for (i = 0; i < pkt_dev->nr_labels; i++)
2531 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2532
2533 mpls--;
2534 *mpls |= MPLS_STACK_BOTTOM;
2535 }
2536
2537 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2538 unsigned int prio)
2539 {
2540 return htons(id | (cfi << 12) | (prio << 13));
2541 }
2542
2543 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2544 struct pktgen_dev *pkt_dev)
2545 {
2546 struct sk_buff *skb = NULL;
2547 __u8 *eth;
2548 struct udphdr *udph;
2549 int datalen, iplen;
2550 struct iphdr *iph;
2551 struct pktgen_hdr *pgh = NULL;
2552 __be16 protocol = htons(ETH_P_IP);
2553 __be32 *mpls;
2554 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2555 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2556 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2557 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2558 u16 queue_map;
2559
2560 if (pkt_dev->nr_labels)
2561 protocol = htons(ETH_P_MPLS_UC);
2562
2563 if (pkt_dev->vlan_id != 0xffff)
2564 protocol = htons(ETH_P_8021Q);
2565
2566 /* Update any of the values, used when we're incrementing various
2567 * fields.
2568 */
2569 queue_map = pkt_dev->cur_queue_map;
2570 mod_cur_headers(pkt_dev);
2571
2572 datalen = (odev->hard_header_len + 16) & ~0xf;
2573 skb = __netdev_alloc_skb(odev,
2574 pkt_dev->cur_pkt_size + 64
2575 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2576 if (!skb) {
2577 sprintf(pkt_dev->result, "No memory");
2578 return NULL;
2579 }
2580
2581 skb_reserve(skb, datalen);
2582
2583 /* Reserve for ethernet and IP header */
2584 eth = (__u8 *) skb_push(skb, 14);
2585 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2586 if (pkt_dev->nr_labels)
2587 mpls_push(mpls, pkt_dev);
2588
2589 if (pkt_dev->vlan_id != 0xffff) {
2590 if (pkt_dev->svlan_id != 0xffff) {
2591 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2592 *svlan_tci = build_tci(pkt_dev->svlan_id,
2593 pkt_dev->svlan_cfi,
2594 pkt_dev->svlan_p);
2595 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2596 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2597 }
2598 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2599 *vlan_tci = build_tci(pkt_dev->vlan_id,
2600 pkt_dev->vlan_cfi,
2601 pkt_dev->vlan_p);
2602 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2603 *vlan_encapsulated_proto = htons(ETH_P_IP);
2604 }
2605
2606 skb->network_header = skb->tail;
2607 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2608 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2609 skb_set_queue_mapping(skb, queue_map);
2610 iph = ip_hdr(skb);
2611 udph = udp_hdr(skb);
2612
2613 memcpy(eth, pkt_dev->hh, 12);
2614 *(__be16 *) & eth[12] = protocol;
2615
2616 /* Eth + IPh + UDPh + mpls */
2617 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2618 pkt_dev->pkt_overhead;
2619 if (datalen < sizeof(struct pktgen_hdr))
2620 datalen = sizeof(struct pktgen_hdr);
2621
2622 udph->source = htons(pkt_dev->cur_udp_src);
2623 udph->dest = htons(pkt_dev->cur_udp_dst);
2624 udph->len = htons(datalen + 8); /* DATA + udphdr */
2625 udph->check = 0; /* No checksum */
2626
2627 iph->ihl = 5;
2628 iph->version = 4;
2629 iph->ttl = 32;
2630 iph->tos = pkt_dev->tos;
2631 iph->protocol = IPPROTO_UDP; /* UDP */
2632 iph->saddr = pkt_dev->cur_saddr;
2633 iph->daddr = pkt_dev->cur_daddr;
2634 iph->id = htons(pkt_dev->ip_id);
2635 pkt_dev->ip_id++;
2636 iph->frag_off = 0;
2637 iplen = 20 + 8 + datalen;
2638 iph->tot_len = htons(iplen);
2639 iph->check = 0;
2640 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2641 skb->protocol = protocol;
2642 skb->mac_header = (skb->network_header - ETH_HLEN -
2643 pkt_dev->pkt_overhead);
2644 skb->dev = odev;
2645 skb->pkt_type = PACKET_HOST;
2646
2647 if (pkt_dev->nfrags <= 0) {
2648 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2649 memset(pgh + 1, 0, datalen - sizeof(struct pktgen_hdr));
2650 } else {
2651 int frags = pkt_dev->nfrags;
2652 int i, len;
2653
2654 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2655
2656 if (frags > MAX_SKB_FRAGS)
2657 frags = MAX_SKB_FRAGS;
2658 if (datalen > frags * PAGE_SIZE) {
2659 len = datalen - frags * PAGE_SIZE;
2660 memset(skb_put(skb, len), 0, len);
2661 datalen = frags * PAGE_SIZE;
2662 }
2663
2664 i = 0;
2665 while (datalen > 0) {
2666 struct page *page = alloc_pages(GFP_KERNEL | __GFP_ZERO, 0);
2667 skb_shinfo(skb)->frags[i].page = page;
2668 skb_shinfo(skb)->frags[i].page_offset = 0;
2669 skb_shinfo(skb)->frags[i].size =
2670 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2671 datalen -= skb_shinfo(skb)->frags[i].size;
2672 skb->len += skb_shinfo(skb)->frags[i].size;
2673 skb->data_len += skb_shinfo(skb)->frags[i].size;
2674 i++;
2675 skb_shinfo(skb)->nr_frags = i;
2676 }
2677
2678 while (i < frags) {
2679 int rem;
2680
2681 if (i == 0)
2682 break;
2683
2684 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2685 if (rem == 0)
2686 break;
2687
2688 skb_shinfo(skb)->frags[i - 1].size -= rem;
2689
2690 skb_shinfo(skb)->frags[i] =
2691 skb_shinfo(skb)->frags[i - 1];
2692 get_page(skb_shinfo(skb)->frags[i].page);
2693 skb_shinfo(skb)->frags[i].page =
2694 skb_shinfo(skb)->frags[i - 1].page;
2695 skb_shinfo(skb)->frags[i].page_offset +=
2696 skb_shinfo(skb)->frags[i - 1].size;
2697 skb_shinfo(skb)->frags[i].size = rem;
2698 i++;
2699 skb_shinfo(skb)->nr_frags = i;
2700 }
2701 }
2702
2703 /* Stamp the time, and sequence number,
2704 * convert them to network byte order
2705 */
2706 if (pgh) {
2707 struct timeval timestamp;
2708
2709 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2710 pgh->seq_num = htonl(pkt_dev->seq_num);
2711
2712 do_gettimeofday(&timestamp);
2713 pgh->tv_sec = htonl(timestamp.tv_sec);
2714 pgh->tv_usec = htonl(timestamp.tv_usec);
2715 }
2716
2717 #ifdef CONFIG_XFRM
2718 if (!process_ipsec(pkt_dev, skb, protocol))
2719 return NULL;
2720 #endif
2721
2722 return skb;
2723 }
2724
2725 /*
2726 * scan_ip6, fmt_ip taken from dietlibc-0.21
2727 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2728 *
2729 * Slightly modified for kernel.
2730 * Should be candidate for net/ipv4/utils.c
2731 * --ro
2732 */
2733
2734 static unsigned int scan_ip6(const char *s, char ip[16])
2735 {
2736 unsigned int i;
2737 unsigned int len = 0;
2738 unsigned long u;
2739 char suffix[16];
2740 unsigned int prefixlen = 0;
2741 unsigned int suffixlen = 0;
2742 __be32 tmp;
2743 char *pos;
2744
2745 for (i = 0; i < 16; i++)
2746 ip[i] = 0;
2747
2748 for (;;) {
2749 if (*s == ':') {
2750 len++;
2751 if (s[1] == ':') { /* Found "::", skip to part 2 */
2752 s += 2;
2753 len++;
2754 break;
2755 }
2756 s++;
2757 }
2758
2759 u = simple_strtoul(s, &pos, 16);
2760 i = pos - s;
2761 if (!i)
2762 return 0;
2763 if (prefixlen == 12 && s[i] == '.') {
2764
2765 /* the last 4 bytes may be written as IPv4 address */
2766
2767 tmp = in_aton(s);
2768 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2769 return i + len;
2770 }
2771 ip[prefixlen++] = (u >> 8);
2772 ip[prefixlen++] = (u & 255);
2773 s += i;
2774 len += i;
2775 if (prefixlen == 16)
2776 return len;
2777 }
2778
2779 /* part 2, after "::" */
2780 for (;;) {
2781 if (*s == ':') {
2782 if (suffixlen == 0)
2783 break;
2784 s++;
2785 len++;
2786 } else if (suffixlen != 0)
2787 break;
2788
2789 u = simple_strtol(s, &pos, 16);
2790 i = pos - s;
2791 if (!i) {
2792 if (*s)
2793 len--;
2794 break;
2795 }
2796 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2797 tmp = in_aton(s);
2798 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2799 sizeof(tmp));
2800 suffixlen += 4;
2801 len += strlen(s);
2802 break;
2803 }
2804 suffix[suffixlen++] = (u >> 8);
2805 suffix[suffixlen++] = (u & 255);
2806 s += i;
2807 len += i;
2808 if (prefixlen + suffixlen == 16)
2809 break;
2810 }
2811 for (i = 0; i < suffixlen; i++)
2812 ip[16 - suffixlen + i] = suffix[i];
2813 return len;
2814 }
2815
2816 static char tohex(char hexdigit)
2817 {
2818 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2819 }
2820
2821 static int fmt_xlong(char *s, unsigned int i)
2822 {
2823 char *bak = s;
2824 *s = tohex((i >> 12) & 0xf);
2825 if (s != bak || *s != '0')
2826 ++s;
2827 *s = tohex((i >> 8) & 0xf);
2828 if (s != bak || *s != '0')
2829 ++s;
2830 *s = tohex((i >> 4) & 0xf);
2831 if (s != bak || *s != '0')
2832 ++s;
2833 *s = tohex(i & 0xf);
2834 return s - bak + 1;
2835 }
2836
2837 static unsigned int fmt_ip6(char *s, const char ip[16])
2838 {
2839 unsigned int len;
2840 unsigned int i;
2841 unsigned int temp;
2842 unsigned int compressing;
2843 int j;
2844
2845 len = 0;
2846 compressing = 0;
2847 for (j = 0; j < 16; j += 2) {
2848
2849 #ifdef V4MAPPEDPREFIX
2850 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2851 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2852 temp = strlen(s);
2853 return len + temp;
2854 }
2855 #endif
2856 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2857 (unsigned long)(unsigned char)ip[j + 1];
2858 if (temp == 0) {
2859 if (!compressing) {
2860 compressing = 1;
2861 if (j == 0) {
2862 *s++ = ':';
2863 ++len;
2864 }
2865 }
2866 } else {
2867 if (compressing) {
2868 compressing = 0;
2869 *s++ = ':';
2870 ++len;
2871 }
2872 i = fmt_xlong(s, temp);
2873 len += i;
2874 s += i;
2875 if (j < 14) {
2876 *s++ = ':';
2877 ++len;
2878 }
2879 }
2880 }
2881 if (compressing) {
2882 *s++ = ':';
2883 ++len;
2884 }
2885 *s = 0;
2886 return len;
2887 }
2888
2889 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2890 struct pktgen_dev *pkt_dev)
2891 {
2892 struct sk_buff *skb = NULL;
2893 __u8 *eth;
2894 struct udphdr *udph;
2895 int datalen;
2896 struct ipv6hdr *iph;
2897 struct pktgen_hdr *pgh = NULL;
2898 __be16 protocol = htons(ETH_P_IPV6);
2899 __be32 *mpls;
2900 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2901 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2902 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2903 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2904 u16 queue_map;
2905
2906 if (pkt_dev->nr_labels)
2907 protocol = htons(ETH_P_MPLS_UC);
2908
2909 if (pkt_dev->vlan_id != 0xffff)
2910 protocol = htons(ETH_P_8021Q);
2911
2912 /* Update any of the values, used when we're incrementing various
2913 * fields.
2914 */
2915 queue_map = pkt_dev->cur_queue_map;
2916 mod_cur_headers(pkt_dev);
2917
2918 skb = __netdev_alloc_skb(odev,
2919 pkt_dev->cur_pkt_size + 64
2920 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
2921 if (!skb) {
2922 sprintf(pkt_dev->result, "No memory");
2923 return NULL;
2924 }
2925
2926 skb_reserve(skb, 16);
2927
2928 /* Reserve for ethernet and IP header */
2929 eth = (__u8 *) skb_push(skb, 14);
2930 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2931 if (pkt_dev->nr_labels)
2932 mpls_push(mpls, pkt_dev);
2933
2934 if (pkt_dev->vlan_id != 0xffff) {
2935 if (pkt_dev->svlan_id != 0xffff) {
2936 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2937 *svlan_tci = build_tci(pkt_dev->svlan_id,
2938 pkt_dev->svlan_cfi,
2939 pkt_dev->svlan_p);
2940 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2941 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2942 }
2943 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2944 *vlan_tci = build_tci(pkt_dev->vlan_id,
2945 pkt_dev->vlan_cfi,
2946 pkt_dev->vlan_p);
2947 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2948 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2949 }
2950
2951 skb->network_header = skb->tail;
2952 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2953 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2954 skb_set_queue_mapping(skb, queue_map);
2955 iph = ipv6_hdr(skb);
2956 udph = udp_hdr(skb);
2957
2958 memcpy(eth, pkt_dev->hh, 12);
2959 *(__be16 *) &eth[12] = protocol;
2960
2961 /* Eth + IPh + UDPh + mpls */
2962 datalen = pkt_dev->cur_pkt_size - 14 -
2963 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2964 pkt_dev->pkt_overhead;
2965
2966 if (datalen < sizeof(struct pktgen_hdr)) {
2967 datalen = sizeof(struct pktgen_hdr);
2968 if (net_ratelimit())
2969 printk(KERN_INFO "pktgen: increased datalen to %d\n",
2970 datalen);
2971 }
2972
2973 udph->source = htons(pkt_dev->cur_udp_src);
2974 udph->dest = htons(pkt_dev->cur_udp_dst);
2975 udph->len = htons(datalen + sizeof(struct udphdr));
2976 udph->check = 0; /* No checksum */
2977
2978 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2979
2980 if (pkt_dev->traffic_class) {
2981 /* Version + traffic class + flow (0) */
2982 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2983 }
2984
2985 iph->hop_limit = 32;
2986
2987 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2988 iph->nexthdr = IPPROTO_UDP;
2989
2990 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2991 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2992
2993 skb->mac_header = (skb->network_header - ETH_HLEN -
2994 pkt_dev->pkt_overhead);
2995 skb->protocol = protocol;
2996 skb->dev = odev;
2997 skb->pkt_type = PACKET_HOST;
2998
2999 if (pkt_dev->nfrags <= 0)
3000 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
3001 else {
3002 int frags = pkt_dev->nfrags;
3003 int i;
3004
3005 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
3006
3007 if (frags > MAX_SKB_FRAGS)
3008 frags = MAX_SKB_FRAGS;
3009 if (datalen > frags * PAGE_SIZE) {
3010 skb_put(skb, datalen - frags * PAGE_SIZE);
3011 datalen = frags * PAGE_SIZE;
3012 }
3013
3014 i = 0;
3015 while (datalen > 0) {
3016 struct page *page = alloc_pages(GFP_KERNEL, 0);
3017 skb_shinfo(skb)->frags[i].page = page;
3018 skb_shinfo(skb)->frags[i].page_offset = 0;
3019 skb_shinfo(skb)->frags[i].size =
3020 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
3021 datalen -= skb_shinfo(skb)->frags[i].size;
3022 skb->len += skb_shinfo(skb)->frags[i].size;
3023 skb->data_len += skb_shinfo(skb)->frags[i].size;
3024 i++;
3025 skb_shinfo(skb)->nr_frags = i;
3026 }
3027
3028 while (i < frags) {
3029 int rem;
3030
3031 if (i == 0)
3032 break;
3033
3034 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
3035 if (rem == 0)
3036 break;
3037
3038 skb_shinfo(skb)->frags[i - 1].size -= rem;
3039
3040 skb_shinfo(skb)->frags[i] =
3041 skb_shinfo(skb)->frags[i - 1];
3042 get_page(skb_shinfo(skb)->frags[i].page);
3043 skb_shinfo(skb)->frags[i].page =
3044 skb_shinfo(skb)->frags[i - 1].page;
3045 skb_shinfo(skb)->frags[i].page_offset +=
3046 skb_shinfo(skb)->frags[i - 1].size;
3047 skb_shinfo(skb)->frags[i].size = rem;
3048 i++;
3049 skb_shinfo(skb)->nr_frags = i;
3050 }
3051 }
3052
3053 /* Stamp the time, and sequence number,
3054 * convert them to network byte order
3055 * should we update cloned packets too ?
3056 */
3057 if (pgh) {
3058 struct timeval timestamp;
3059
3060 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
3061 pgh->seq_num = htonl(pkt_dev->seq_num);
3062
3063 do_gettimeofday(&timestamp);
3064 pgh->tv_sec = htonl(timestamp.tv_sec);
3065 pgh->tv_usec = htonl(timestamp.tv_usec);
3066 }
3067 /* pkt_dev->seq_num++; FF: you really mean this? */
3068
3069 return skb;
3070 }
3071
3072 static struct sk_buff *fill_packet(struct net_device *odev,
3073 struct pktgen_dev *pkt_dev)
3074 {
3075 if (pkt_dev->flags & F_IPV6)
3076 return fill_packet_ipv6(odev, pkt_dev);
3077 else
3078 return fill_packet_ipv4(odev, pkt_dev);
3079 }
3080
3081 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3082 {
3083 pkt_dev->seq_num = 1;
3084 pkt_dev->idle_acc = 0;
3085 pkt_dev->sofar = 0;
3086 pkt_dev->tx_bytes = 0;
3087 pkt_dev->errors = 0;
3088 }
3089
3090 /* Set up structure for sending pkts, clear counters */
3091
3092 static void pktgen_run(struct pktgen_thread *t)
3093 {
3094 struct pktgen_dev *pkt_dev;
3095 int started = 0;
3096
3097 pr_debug("pktgen: entering pktgen_run. %p\n", t);
3098
3099 if_lock(t);
3100 list_for_each_entry(pkt_dev, &t->if_list, list) {
3101
3102 /*
3103 * setup odev and create initial packet.
3104 */
3105 pktgen_setup_inject(pkt_dev);
3106
3107 if (pkt_dev->odev) {
3108 pktgen_clear_counters(pkt_dev);
3109 pkt_dev->running = 1; /* Cranke yeself! */
3110 pkt_dev->skb = NULL;
3111 pkt_dev->started_at =
3112 pkt_dev->next_tx = ktime_now();
3113
3114 set_pkt_overhead(pkt_dev);
3115
3116 strcpy(pkt_dev->result, "Starting");
3117 started++;
3118 } else
3119 strcpy(pkt_dev->result, "Error starting");
3120 }
3121 if_unlock(t);
3122 if (started)
3123 t->control &= ~(T_STOP);
3124 }
3125
3126 static void pktgen_stop_all_threads_ifs(void)
3127 {
3128 struct pktgen_thread *t;
3129
3130 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n");
3131
3132 mutex_lock(&pktgen_thread_lock);
3133
3134 list_for_each_entry(t, &pktgen_threads, th_list)
3135 t->control |= T_STOP;
3136
3137 mutex_unlock(&pktgen_thread_lock);
3138 }
3139
3140 static int thread_is_running(const struct pktgen_thread *t)
3141 {
3142 const struct pktgen_dev *pkt_dev;
3143
3144 list_for_each_entry(pkt_dev, &t->if_list, list)
3145 if (pkt_dev->running)
3146 return 1;
3147 return 0;
3148 }
3149
3150 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3151 {
3152 if_lock(t);
3153
3154 while (thread_is_running(t)) {
3155
3156 if_unlock(t);
3157
3158 msleep_interruptible(100);
3159
3160 if (signal_pending(current))
3161 goto signal;
3162 if_lock(t);
3163 }
3164 if_unlock(t);
3165 return 1;
3166 signal:
3167 return 0;
3168 }
3169
3170 static int pktgen_wait_all_threads_run(void)
3171 {
3172 struct pktgen_thread *t;
3173 int sig = 1;
3174
3175 mutex_lock(&pktgen_thread_lock);
3176
3177 list_for_each_entry(t, &pktgen_threads, th_list) {
3178 sig = pktgen_wait_thread_run(t);
3179 if (sig == 0)
3180 break;
3181 }
3182
3183 if (sig == 0)
3184 list_for_each_entry(t, &pktgen_threads, th_list)
3185 t->control |= (T_STOP);
3186
3187 mutex_unlock(&pktgen_thread_lock);
3188 return sig;
3189 }
3190
3191 static void pktgen_run_all_threads(void)
3192 {
3193 struct pktgen_thread *t;
3194
3195 pr_debug("pktgen: entering pktgen_run_all_threads.\n");
3196
3197 mutex_lock(&pktgen_thread_lock);
3198
3199 list_for_each_entry(t, &pktgen_threads, th_list)
3200 t->control |= (T_RUN);
3201
3202 mutex_unlock(&pktgen_thread_lock);
3203
3204 /* Propagate thread->control */
3205 schedule_timeout_interruptible(msecs_to_jiffies(125));
3206
3207 pktgen_wait_all_threads_run();
3208 }
3209
3210 static void pktgen_reset_all_threads(void)
3211 {
3212 struct pktgen_thread *t;
3213
3214 pr_debug("pktgen: entering pktgen_reset_all_threads.\n");
3215
3216 mutex_lock(&pktgen_thread_lock);
3217
3218 list_for_each_entry(t, &pktgen_threads, th_list)
3219 t->control |= (T_REMDEVALL);
3220
3221 mutex_unlock(&pktgen_thread_lock);
3222
3223 /* Propagate thread->control */
3224 schedule_timeout_interruptible(msecs_to_jiffies(125));
3225
3226 pktgen_wait_all_threads_run();
3227 }
3228
3229 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3230 {
3231 __u64 bps, mbps, pps;
3232 char *p = pkt_dev->result;
3233 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3234 pkt_dev->started_at);
3235 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3236
3237 p += sprintf(p, "OK: %llu(c%llu+d%llu) nsec, %llu (%dbyte,%dfrags)\n",
3238 (unsigned long long)ktime_to_us(elapsed),
3239 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3240 (unsigned long long)ktime_to_us(idle),
3241 (unsigned long long)pkt_dev->sofar,
3242 pkt_dev->cur_pkt_size, nr_frags);
3243
3244 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3245 ktime_to_ns(elapsed));
3246
3247 bps = pps * 8 * pkt_dev->cur_pkt_size;
3248
3249 mbps = bps;
3250 do_div(mbps, 1000000);
3251 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3252 (unsigned long long)pps,
3253 (unsigned long long)mbps,
3254 (unsigned long long)bps,
3255 (unsigned long long)pkt_dev->errors);
3256 }
3257
3258 /* Set stopped-at timer, remove from running list, do counters & statistics */
3259 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3260 {
3261 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3262
3263 if (!pkt_dev->running) {
3264 printk(KERN_WARNING "pktgen: interface: %s is already "
3265 "stopped\n", pkt_dev->odev->name);
3266 return -EINVAL;
3267 }
3268
3269 kfree_skb(pkt_dev->skb);
3270 pkt_dev->skb = NULL;
3271 pkt_dev->stopped_at = ktime_now();
3272 pkt_dev->running = 0;
3273
3274 show_results(pkt_dev, nr_frags);
3275
3276 return 0;
3277 }
3278
3279 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3280 {
3281 struct pktgen_dev *pkt_dev, *best = NULL;
3282
3283 if_lock(t);
3284
3285 list_for_each_entry(pkt_dev, &t->if_list, list) {
3286 if (!pkt_dev->running)
3287 continue;
3288 if (best == NULL)
3289 best = pkt_dev;
3290 else if (ktime_lt(pkt_dev->next_tx, best->next_tx))
3291 best = pkt_dev;
3292 }
3293 if_unlock(t);
3294 return best;
3295 }
3296
3297 static void pktgen_stop(struct pktgen_thread *t)
3298 {
3299 struct pktgen_dev *pkt_dev;
3300
3301 pr_debug("pktgen: entering pktgen_stop\n");
3302
3303 if_lock(t);
3304
3305 list_for_each_entry(pkt_dev, &t->if_list, list) {
3306 pktgen_stop_device(pkt_dev);
3307 }
3308
3309 if_unlock(t);
3310 }
3311
3312 /*
3313 * one of our devices needs to be removed - find it
3314 * and remove it
3315 */
3316 static void pktgen_rem_one_if(struct pktgen_thread *t)
3317 {
3318 struct list_head *q, *n;
3319 struct pktgen_dev *cur;
3320
3321 pr_debug("pktgen: entering pktgen_rem_one_if\n");
3322
3323 if_lock(t);
3324
3325 list_for_each_safe(q, n, &t->if_list) {
3326 cur = list_entry(q, struct pktgen_dev, list);
3327
3328 if (!cur->removal_mark)
3329 continue;
3330
3331 kfree_skb(cur->skb);
3332 cur->skb = NULL;
3333
3334 pktgen_remove_device(t, cur);
3335
3336 break;
3337 }
3338
3339 if_unlock(t);
3340 }
3341
3342 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3343 {
3344 struct list_head *q, *n;
3345 struct pktgen_dev *cur;
3346
3347 /* Remove all devices, free mem */
3348
3349 pr_debug("pktgen: entering pktgen_rem_all_ifs\n");
3350 if_lock(t);
3351
3352 list_for_each_safe(q, n, &t->if_list) {
3353 cur = list_entry(q, struct pktgen_dev, list);
3354
3355 kfree_skb(cur->skb);
3356 cur->skb = NULL;
3357
3358 pktgen_remove_device(t, cur);
3359 }
3360
3361 if_unlock(t);
3362 }
3363
3364 static void pktgen_rem_thread(struct pktgen_thread *t)
3365 {
3366 /* Remove from the thread list */
3367
3368 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3369
3370 mutex_lock(&pktgen_thread_lock);
3371
3372 list_del(&t->th_list);
3373
3374 mutex_unlock(&pktgen_thread_lock);
3375 }
3376
3377 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3378 {
3379 ktime_t idle_start = ktime_now();
3380 schedule();
3381 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3382 }
3383
3384 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3385 {
3386 ktime_t idle_start = ktime_now();
3387
3388 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3389 if (signal_pending(current))
3390 break;
3391
3392 if (need_resched())
3393 pktgen_resched(pkt_dev);
3394 else
3395 cpu_relax();
3396 }
3397 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3398 }
3399
3400 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3401 {
3402 struct net_device *odev = pkt_dev->odev;
3403 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3404 = odev->netdev_ops->ndo_start_xmit;
3405 struct netdev_queue *txq;
3406 u16 queue_map;
3407 int ret;
3408
3409 /* If device is offline, then don't send */
3410 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3411 pktgen_stop_device(pkt_dev);
3412 return;
3413 }
3414
3415 /* This is max DELAY, this has special meaning of
3416 * "never transmit"
3417 */
3418 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3419 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX);
3420 return;
3421 }
3422
3423 /* If no skb or clone count exhausted then get new one */
3424 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3425 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3426 /* build a new pkt */
3427 kfree_skb(pkt_dev->skb);
3428
3429 pkt_dev->skb = fill_packet(odev, pkt_dev);
3430 if (pkt_dev->skb == NULL) {
3431 printk(KERN_ERR "pktgen: ERROR: couldn't "
3432 "allocate skb in fill_packet.\n");
3433 schedule();
3434 pkt_dev->clone_count--; /* back out increment, OOM */
3435 return;
3436 }
3437
3438 pkt_dev->allocated_skbs++;
3439 pkt_dev->clone_count = 0; /* reset counter */
3440 }
3441
3442 if (pkt_dev->delay && pkt_dev->last_ok)
3443 spin(pkt_dev, pkt_dev->next_tx);
3444
3445 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3446 txq = netdev_get_tx_queue(odev, queue_map);
3447
3448 __netif_tx_lock_bh(txq);
3449 atomic_inc(&(pkt_dev->skb->users));
3450
3451 if (unlikely(netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq)))
3452 ret = NETDEV_TX_BUSY;
3453 else
3454 ret = (*xmit)(pkt_dev->skb, odev);
3455
3456 switch (ret) {
3457 case NETDEV_TX_OK:
3458 txq_trans_update(txq);
3459 pkt_dev->last_ok = 1;
3460 pkt_dev->sofar++;
3461 pkt_dev->seq_num++;
3462 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size;
3463 break;
3464 default: /* Drivers are not supposed to return other values! */
3465 if (net_ratelimit())
3466 pr_info("pktgen: %s xmit error: %d\n",
3467 odev->name, ret);
3468 pkt_dev->errors++;
3469 /* fallthru */
3470 case NETDEV_TX_LOCKED:
3471 case NETDEV_TX_BUSY:
3472 /* Retry it next time */
3473 atomic_dec(&(pkt_dev->skb->users));
3474 pkt_dev->last_ok = 0;
3475 }
3476 __netif_tx_unlock_bh(txq);
3477
3478 /* If pkt_dev->count is zero, then run forever */
3479 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3480 pktgen_wait_for_skb(pkt_dev);
3481
3482 /* Done with this */
3483 pktgen_stop_device(pkt_dev);
3484 }
3485 }
3486
3487 /*
3488 * Main loop of the thread goes here
3489 */
3490
3491 static int pktgen_thread_worker(void *arg)
3492 {
3493 DEFINE_WAIT(wait);
3494 struct pktgen_thread *t = arg;
3495 struct pktgen_dev *pkt_dev = NULL;
3496 int cpu = t->cpu;
3497
3498 BUG_ON(smp_processor_id() != cpu);
3499
3500 init_waitqueue_head(&t->queue);
3501 complete(&t->start_done);
3502
3503 pr_debug("pktgen: starting pktgen/%d: pid=%d\n",
3504 cpu, task_pid_nr(current));
3505
3506 set_current_state(TASK_INTERRUPTIBLE);
3507
3508 set_freezable();
3509
3510 while (!kthread_should_stop()) {
3511 pkt_dev = next_to_run(t);
3512
3513 if (unlikely(!pkt_dev && t->control == 0)) {
3514 wait_event_interruptible_timeout(t->queue,
3515 t->control != 0,
3516 HZ/10);
3517 continue;
3518 }
3519
3520 __set_current_state(TASK_RUNNING);
3521
3522 if (likely(pkt_dev)) {
3523 pktgen_xmit(pkt_dev);
3524
3525 if (need_resched())
3526 pktgen_resched(pkt_dev);
3527 else
3528 cpu_relax();
3529 }
3530
3531 if (t->control & T_STOP) {
3532 pktgen_stop(t);
3533 t->control &= ~(T_STOP);
3534 }
3535
3536 if (t->control & T_RUN) {
3537 pktgen_run(t);
3538 t->control &= ~(T_RUN);
3539 }
3540
3541 if (t->control & T_REMDEVALL) {
3542 pktgen_rem_all_ifs(t);
3543 t->control &= ~(T_REMDEVALL);
3544 }
3545
3546 if (t->control & T_REMDEV) {
3547 pktgen_rem_one_if(t);
3548 t->control &= ~(T_REMDEV);
3549 }
3550
3551 try_to_freeze();
3552
3553 set_current_state(TASK_INTERRUPTIBLE);
3554 }
3555
3556 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm);
3557 pktgen_stop(t);
3558
3559 pr_debug("pktgen: %s removing all device\n", t->tsk->comm);
3560 pktgen_rem_all_ifs(t);
3561
3562 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm);
3563 pktgen_rem_thread(t);
3564
3565 return 0;
3566 }
3567
3568 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3569 const char *ifname)
3570 {
3571 struct pktgen_dev *p, *pkt_dev = NULL;
3572 if_lock(t);
3573
3574 list_for_each_entry(p, &t->if_list, list)
3575 if (strncmp(p->odev->name, ifname, IFNAMSIZ) == 0) {
3576 pkt_dev = p;
3577 break;
3578 }
3579
3580 if_unlock(t);
3581 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev);
3582 return pkt_dev;
3583 }
3584
3585 /*
3586 * Adds a dev at front of if_list.
3587 */
3588
3589 static int add_dev_to_thread(struct pktgen_thread *t,
3590 struct pktgen_dev *pkt_dev)
3591 {
3592 int rv = 0;
3593
3594 if_lock(t);
3595
3596 if (pkt_dev->pg_thread) {
3597 printk(KERN_ERR "pktgen: ERROR: already assigned "
3598 "to a thread.\n");
3599 rv = -EBUSY;
3600 goto out;
3601 }
3602
3603 list_add(&pkt_dev->list, &t->if_list);
3604 pkt_dev->pg_thread = t;
3605 pkt_dev->running = 0;
3606
3607 out:
3608 if_unlock(t);
3609 return rv;
3610 }
3611
3612 /* Called under thread lock */
3613
3614 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3615 {
3616 struct pktgen_dev *pkt_dev;
3617 int err;
3618
3619 /* We don't allow a device to be on several threads */
3620
3621 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3622 if (pkt_dev) {
3623 printk(KERN_ERR "pktgen: ERROR: interface already used.\n");
3624 return -EBUSY;
3625 }
3626
3627 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
3628 if (!pkt_dev)
3629 return -ENOMEM;
3630
3631 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state));
3632 if (pkt_dev->flows == NULL) {
3633 kfree(pkt_dev);
3634 return -ENOMEM;
3635 }
3636 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3637
3638 pkt_dev->removal_mark = 0;
3639 pkt_dev->min_pkt_size = ETH_ZLEN;
3640 pkt_dev->max_pkt_size = ETH_ZLEN;
3641 pkt_dev->nfrags = 0;
3642 pkt_dev->clone_skb = pg_clone_skb_d;
3643 pkt_dev->delay = pg_delay_d;
3644 pkt_dev->count = pg_count_d;
3645 pkt_dev->sofar = 0;
3646 pkt_dev->udp_src_min = 9; /* sink port */
3647 pkt_dev->udp_src_max = 9;
3648 pkt_dev->udp_dst_min = 9;
3649 pkt_dev->udp_dst_max = 9;
3650
3651 pkt_dev->vlan_p = 0;
3652 pkt_dev->vlan_cfi = 0;
3653 pkt_dev->vlan_id = 0xffff;
3654 pkt_dev->svlan_p = 0;
3655 pkt_dev->svlan_cfi = 0;
3656 pkt_dev->svlan_id = 0xffff;
3657
3658 err = pktgen_setup_dev(pkt_dev, ifname);
3659 if (err)
3660 goto out1;
3661
3662 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3663 &pktgen_if_fops, pkt_dev);
3664 if (!pkt_dev->entry) {
3665 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3666 PG_PROC_DIR, ifname);
3667 err = -EINVAL;
3668 goto out2;
3669 }
3670 #ifdef CONFIG_XFRM
3671 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3672 pkt_dev->ipsproto = IPPROTO_ESP;
3673 #endif
3674
3675 return add_dev_to_thread(t, pkt_dev);
3676 out2:
3677 dev_put(pkt_dev->odev);
3678 out1:
3679 #ifdef CONFIG_XFRM
3680 free_SAs(pkt_dev);
3681 #endif
3682 vfree(pkt_dev->flows);
3683 kfree(pkt_dev);
3684 return err;
3685 }
3686
3687 static int __init pktgen_create_thread(int cpu)
3688 {
3689 struct pktgen_thread *t;
3690 struct proc_dir_entry *pe;
3691 struct task_struct *p;
3692
3693 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL);
3694 if (!t) {
3695 printk(KERN_ERR "pktgen: ERROR: out of memory, can't "
3696 "create new thread.\n");
3697 return -ENOMEM;
3698 }
3699
3700 spin_lock_init(&t->if_lock);
3701 t->cpu = cpu;
3702
3703 INIT_LIST_HEAD(&t->if_list);
3704
3705 list_add_tail(&t->th_list, &pktgen_threads);
3706 init_completion(&t->start_done);
3707
3708 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu);
3709 if (IS_ERR(p)) {
3710 printk(KERN_ERR "pktgen: kernel_thread() failed "
3711 "for cpu %d\n", t->cpu);
3712 list_del(&t->th_list);
3713 kfree(t);
3714 return PTR_ERR(p);
3715 }
3716 kthread_bind(p, cpu);
3717 t->tsk = p;
3718
3719 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3720 &pktgen_thread_fops, t);
3721 if (!pe) {
3722 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3723 PG_PROC_DIR, t->tsk->comm);
3724 kthread_stop(p);
3725 list_del(&t->th_list);
3726 kfree(t);
3727 return -EINVAL;
3728 }
3729
3730 wake_up_process(p);
3731 wait_for_completion(&t->start_done);
3732
3733 return 0;
3734 }
3735
3736 /*
3737 * Removes a device from the thread if_list.
3738 */
3739 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3740 struct pktgen_dev *pkt_dev)
3741 {
3742 struct list_head *q, *n;
3743 struct pktgen_dev *p;
3744
3745 list_for_each_safe(q, n, &t->if_list) {
3746 p = list_entry(q, struct pktgen_dev, list);
3747 if (p == pkt_dev)
3748 list_del(&p->list);
3749 }
3750 }
3751
3752 static int pktgen_remove_device(struct pktgen_thread *t,
3753 struct pktgen_dev *pkt_dev)
3754 {
3755
3756 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev);
3757
3758 if (pkt_dev->running) {
3759 printk(KERN_WARNING "pktgen: WARNING: trying to remove a "
3760 "running interface, stopping it now.\n");
3761 pktgen_stop_device(pkt_dev);
3762 }
3763
3764 /* Dis-associate from the interface */
3765
3766 if (pkt_dev->odev) {
3767 dev_put(pkt_dev->odev);
3768 pkt_dev->odev = NULL;
3769 }
3770
3771 /* And update the thread if_list */
3772
3773 _rem_dev_from_if_list(t, pkt_dev);
3774
3775 if (pkt_dev->entry)
3776 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3777
3778 #ifdef CONFIG_XFRM
3779 free_SAs(pkt_dev);
3780 #endif
3781 vfree(pkt_dev->flows);
3782 kfree(pkt_dev);
3783 return 0;
3784 }
3785
3786 static int __init pg_init(void)
3787 {
3788 int cpu;
3789 struct proc_dir_entry *pe;
3790
3791 printk(KERN_INFO "%s", version);
3792
3793 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3794 if (!pg_proc_dir)
3795 return -ENODEV;
3796
3797 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3798 if (pe == NULL) {
3799 printk(KERN_ERR "pktgen: ERROR: cannot create %s "
3800 "procfs entry.\n", PGCTRL);
3801 proc_net_remove(&init_net, PG_PROC_DIR);
3802 return -EINVAL;
3803 }
3804
3805 /* Register us to receive netdevice events */
3806 register_netdevice_notifier(&pktgen_notifier_block);
3807
3808 for_each_online_cpu(cpu) {
3809 int err;
3810
3811 err = pktgen_create_thread(cpu);
3812 if (err)
3813 printk(KERN_WARNING "pktgen: WARNING: Cannot create "
3814 "thread for cpu %d (%d)\n", cpu, err);
3815 }
3816
3817 if (list_empty(&pktgen_threads)) {
3818 printk(KERN_ERR "pktgen: ERROR: Initialization failed for "
3819 "all threads\n");
3820 unregister_netdevice_notifier(&pktgen_notifier_block);
3821 remove_proc_entry(PGCTRL, pg_proc_dir);
3822 proc_net_remove(&init_net, PG_PROC_DIR);
3823 return -ENODEV;
3824 }
3825
3826 return 0;
3827 }
3828
3829 static void __exit pg_cleanup(void)
3830 {
3831 struct pktgen_thread *t;
3832 struct list_head *q, *n;
3833 wait_queue_head_t queue;
3834 init_waitqueue_head(&queue);
3835
3836 /* Stop all interfaces & threads */
3837
3838 list_for_each_safe(q, n, &pktgen_threads) {
3839 t = list_entry(q, struct pktgen_thread, th_list);
3840 kthread_stop(t->tsk);
3841 kfree(t);
3842 }
3843
3844 /* Un-register us from receiving netdevice events */
3845 unregister_netdevice_notifier(&pktgen_notifier_block);
3846
3847 /* Clean up proc file system */
3848 remove_proc_entry(PGCTRL, pg_proc_dir);
3849 proc_net_remove(&init_net, PG_PROC_DIR);
3850 }
3851
3852 module_init(pg_init);
3853 module_exit(pg_cleanup);
3854
3855 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3856 MODULE_DESCRIPTION("Packet Generator tool");
3857 MODULE_LICENSE("GPL");
3858 MODULE_VERSION(VERSION);
3859 module_param(pg_count_d, int, 0);
3860 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3861 module_param(pg_delay_d, int, 0);
3862 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3863 module_param(pg_clone_skb_d, int, 0);
3864 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3865 module_param(debug, int, 0);
3866 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
Support for the Chinese Samsung S3C2440 based development boards