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trivial: dmi_scan typo
[linux-2.6/mini2440.git] / net / core / pktgen.c
bloba47f5bad110dc99ae7218df0a034a72459ef9e31
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/freezer.h>
135 #include <linux/delay.h>
136 #include <linux/timer.h>
137 #include <linux/list.h>
138 #include <linux/init.h>
139 #include <linux/skbuff.h>
140 #include <linux/netdevice.h>
141 #include <linux/inet.h>
142 #include <linux/inetdevice.h>
143 #include <linux/rtnetlink.h>
144 #include <linux/if_arp.h>
145 #include <linux/if_vlan.h>
146 #include <linux/in.h>
147 #include <linux/ip.h>
148 #include <linux/ipv6.h>
149 #include <linux/udp.h>
150 #include <linux/proc_fs.h>
151 #include <linux/seq_file.h>
152 #include <linux/wait.h>
153 #include <linux/etherdevice.h>
154 #include <linux/kthread.h>
155 #include <net/net_namespace.h>
156 #include <net/checksum.h>
157 #include <net/ipv6.h>
158 #include <net/addrconf.h>
159 #ifdef CONFIG_XFRM
160 #include <net/xfrm.h>
161 #endif
162 #include <asm/byteorder.h>
163 #include <linux/rcupdate.h>
164 #include <linux/bitops.h>
165 #include <asm/io.h>
166 #include <asm/dma.h>
167 #include <asm/uaccess.h>
168 #include <asm/div64.h> /* do_div */
169 #include <asm/timex.h>
170
171 #define VERSION "pktgen v2.70: Packet Generator for packet performance testing.\n"
172
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_TERMINATE (1<<0)
196 #define T_STOP (1<<1) /* Stop run */
197 #define T_RUN (1<<2) /* Start run */
198 #define T_REMDEVALL (1<<3) /* Remove all devs */
199 #define T_REMDEV (1<<4) /* Remove one dev */
200
201 /* If lock -- can be removed after some work */
202 #define if_lock(t) spin_lock(&(t->if_lock));
203 #define if_unlock(t) spin_unlock(&(t->if_lock));
204
205 /* Used to help with determining the pkts on receive */
206 #define PKTGEN_MAGIC 0xbe9be955
207 #define PG_PROC_DIR "pktgen"
208 #define PGCTRL "pgctrl"
209 static struct proc_dir_entry *pg_proc_dir = NULL;
210
211 #define MAX_CFLOWS 65536
212
213 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
214 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
215
216 struct flow_state {
217 __be32 cur_daddr;
218 int count;
219 #ifdef CONFIG_XFRM
220 struct xfrm_state *x;
221 #endif
222 __u32 flags;
223 };
224
225 /* flow flag bits */
226 #define F_INIT (1<<0) /* flow has been initialized */
227
228 struct pktgen_dev {
229 /*
230 * Try to keep frequent/infrequent used vars. separated.
231 */
232 struct proc_dir_entry *entry; /* proc file */
233 struct pktgen_thread *pg_thread;/* the owner */
234 struct list_head list; /* Used for chaining in the thread's run-queue */
235
236 int running; /* if this changes to false, the test will stop */
237
238 /* If min != max, then we will either do a linear iteration, or
239 * we will do a random selection from within the range.
240 */
241 __u32 flags;
242 int removal_mark; /* non-zero => the device is marked for
243 * removal by worker thread */
244
245 int min_pkt_size; /* = ETH_ZLEN; */
246 int max_pkt_size; /* = ETH_ZLEN; */
247 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
248 int nfrags;
249 __u32 delay_us; /* Default delay */
250 __u32 delay_ns;
251 __u64 count; /* Default No packets to send */
252 __u64 sofar; /* How many pkts we've sent so far */
253 __u64 tx_bytes; /* How many bytes we've transmitted */
254 __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */
255
256 /* runtime counters relating to clone_skb */
257 __u64 next_tx_us; /* timestamp of when to tx next */
258 __u32 next_tx_ns;
259
260 __u64 allocated_skbs;
261 __u32 clone_count;
262 int last_ok; /* Was last skb sent?
263 * Or a failed transmit of some sort? This will keep
264 * sequence numbers in order, for example.
265 */
266 __u64 started_at; /* micro-seconds */
267 __u64 stopped_at; /* micro-seconds */
268 __u64 idle_acc; /* micro-seconds */
269 __u32 seq_num;
270
271 int clone_skb; /* Use multiple SKBs during packet gen. If this number
272 * is greater than 1, then that many copies of the same
273 * packet will be sent before a new packet is allocated.
274 * For instance, if you want to send 1024 identical packets
275 * before creating a new packet, set clone_skb to 1024.
276 */
277
278 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
279 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
280 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
281 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
282
283 struct in6_addr in6_saddr;
284 struct in6_addr in6_daddr;
285 struct in6_addr cur_in6_daddr;
286 struct in6_addr cur_in6_saddr;
287 /* For ranges */
288 struct in6_addr min_in6_daddr;
289 struct in6_addr max_in6_daddr;
290 struct in6_addr min_in6_saddr;
291 struct in6_addr max_in6_saddr;
292
293 /* If we're doing ranges, random or incremental, then this
294 * defines the min/max for those ranges.
295 */
296 __be32 saddr_min; /* inclusive, source IP address */
297 __be32 saddr_max; /* exclusive, source IP address */
298 __be32 daddr_min; /* inclusive, dest IP address */
299 __be32 daddr_max; /* exclusive, dest IP address */
300
301 __u16 udp_src_min; /* inclusive, source UDP port */
302 __u16 udp_src_max; /* exclusive, source UDP port */
303 __u16 udp_dst_min; /* inclusive, dest UDP port */
304 __u16 udp_dst_max; /* exclusive, dest UDP port */
305
306 /* DSCP + ECN */
307 __u8 tos; /* six most significant bits of (former) IPv4 TOS are for dscp codepoint */
308 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 (see RFC 3260, sec. 4) */
309
310 /* MPLS */
311 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
312 __be32 labels[MAX_MPLS_LABELS];
313
314 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
315 __u8 vlan_p;
316 __u8 vlan_cfi;
317 __u16 vlan_id; /* 0xffff means no vlan tag */
318
319 __u8 svlan_p;
320 __u8 svlan_cfi;
321 __u16 svlan_id; /* 0xffff means no svlan tag */
322
323 __u32 src_mac_count; /* How many MACs to iterate through */
324 __u32 dst_mac_count; /* How many MACs to iterate through */
325
326 unsigned char dst_mac[ETH_ALEN];
327 unsigned char src_mac[ETH_ALEN];
328
329 __u32 cur_dst_mac_offset;
330 __u32 cur_src_mac_offset;
331 __be32 cur_saddr;
332 __be32 cur_daddr;
333 __u16 cur_udp_dst;
334 __u16 cur_udp_src;
335 __u16 cur_queue_map;
336 __u32 cur_pkt_size;
337
338 __u8 hh[14];
339 /* = {
340 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
341
342 We fill in SRC address later
343 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
344 0x08, 0x00
345 };
346 */
347 __u16 pad; /* pad out the hh struct to an even 16 bytes */
348
349 struct sk_buff *skb; /* skb we are to transmit next, mainly used for when we
350 * are transmitting the same one multiple times
351 */
352 struct net_device *odev; /* The out-going device. Note that the device should
353 * have it's pg_info pointer pointing back to this
354 * device. This will be set when the user specifies
355 * the out-going device name (not when the inject is
356 * started as it used to do.)
357 */
358 struct flow_state *flows;
359 unsigned cflows; /* Concurrent flows (config) */
360 unsigned lflow; /* Flow length (config) */
361 unsigned nflows; /* accumulated flows (stats) */
362 unsigned curfl; /* current sequenced flow (state)*/
363
364 u16 queue_map_min;
365 u16 queue_map_max;
366
367 #ifdef CONFIG_XFRM
368 __u8 ipsmode; /* IPSEC mode (config) */
369 __u8 ipsproto; /* IPSEC type (config) */
370 #endif
371 char result[512];
372 };
373
374 struct pktgen_hdr {
375 __be32 pgh_magic;
376 __be32 seq_num;
377 __be32 tv_sec;
378 __be32 tv_usec;
379 };
380
381 struct pktgen_thread {
382 spinlock_t if_lock;
383 struct list_head if_list; /* All device here */
384 struct list_head th_list;
385 struct task_struct *tsk;
386 char result[512];
387
388 /* Field for thread to receive "posted" events terminate, stop ifs etc. */
389
390 u32 control;
391 int cpu;
392
393 wait_queue_head_t queue;
394 struct completion start_done;
395 };
396
397 #define REMOVE 1
398 #define FIND 0
399
400 /** Convert to micro-seconds */
401 static inline __u64 tv_to_us(const struct timeval *tv)
402 {
403 __u64 us = tv->tv_usec;
404 us += (__u64) tv->tv_sec * (__u64) 1000000;
405 return us;
406 }
407
408 static __u64 getCurUs(void)
409 {
410 struct timeval tv;
411 do_gettimeofday(&tv);
412 return tv_to_us(&tv);
413 }
414
415 /* old include end */
416
417 static char version[] __initdata = VERSION;
418
419 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
420 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
421 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
422 const char *ifname);
423 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
424 static void pktgen_run_all_threads(void);
425 static void pktgen_stop_all_threads_ifs(void);
426 static int pktgen_stop_device(struct pktgen_dev *pkt_dev);
427 static void pktgen_stop(struct pktgen_thread *t);
428 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
429
430 static unsigned int scan_ip6(const char *s, char ip[16]);
431 static unsigned int fmt_ip6(char *s, const char ip[16]);
432
433 /* Module parameters, defaults. */
434 static int pg_count_d = 1000; /* 1000 pkts by default */
435 static int pg_delay_d;
436 static int pg_clone_skb_d;
437 static int debug;
438
439 static DEFINE_MUTEX(pktgen_thread_lock);
440 static LIST_HEAD(pktgen_threads);
441
442 static struct notifier_block pktgen_notifier_block = {
443 .notifier_call = pktgen_device_event,
444 };
445
446 /*
447 * /proc handling functions
448 *
449 */
450
451 static int pgctrl_show(struct seq_file *seq, void *v)
452 {
453 seq_puts(seq, VERSION);
454 return 0;
455 }
456
457 static ssize_t pgctrl_write(struct file *file, const char __user * buf,
458 size_t count, loff_t * ppos)
459 {
460 int err = 0;
461 char data[128];
462
463 if (!capable(CAP_NET_ADMIN)) {
464 err = -EPERM;
465 goto out;
466 }
467
468 if (count > sizeof(data))
469 count = sizeof(data);
470
471 if (copy_from_user(data, buf, count)) {
472 err = -EFAULT;
473 goto out;
474 }
475 data[count - 1] = 0; /* Make string */
476
477 if (!strcmp(data, "stop"))
478 pktgen_stop_all_threads_ifs();
479
480 else if (!strcmp(data, "start"))
481 pktgen_run_all_threads();
482
483 else
484 printk(KERN_WARNING "pktgen: Unknown command: %s\n", data);
485
486 err = count;
487
488 out:
489 return err;
490 }
491
492 static int pgctrl_open(struct inode *inode, struct file *file)
493 {
494 return single_open(file, pgctrl_show, PDE(inode)->data);
495 }
496
497 static const struct file_operations pktgen_fops = {
498 .owner = THIS_MODULE,
499 .open = pgctrl_open,
500 .read = seq_read,
501 .llseek = seq_lseek,
502 .write = pgctrl_write,
503 .release = single_release,
504 };
505
506 static int pktgen_if_show(struct seq_file *seq, void *v)
507 {
508 struct pktgen_dev *pkt_dev = seq->private;
509 __u64 sa;
510 __u64 stopped;
511 __u64 now = getCurUs();
512 DECLARE_MAC_BUF(mac);
513
514 seq_printf(seq,
515 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
516 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
517 pkt_dev->max_pkt_size);
518
519 seq_printf(seq,
520 " frags: %d delay: %u clone_skb: %d ifname: %s\n",
521 pkt_dev->nfrags,
522 1000 * pkt_dev->delay_us + pkt_dev->delay_ns,
523 pkt_dev->clone_skb, pkt_dev->odev->name);
524
525 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
526 pkt_dev->lflow);
527
528 seq_printf(seq,
529 " queue_map_min: %u queue_map_max: %u\n",
530 pkt_dev->queue_map_min,
531 pkt_dev->queue_map_max);
532
533 if (pkt_dev->flags & F_IPV6) {
534 char b1[128], b2[128], b3[128];
535 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
536 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
537 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
538 seq_printf(seq,
539 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
540 b2, b3);
541
542 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
543 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
544 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
545 seq_printf(seq,
546 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
547 b2, b3);
548
549 } else
550 seq_printf(seq,
551 " dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n",
552 pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min,
553 pkt_dev->src_max);
554
555 seq_puts(seq, " src_mac: ");
556
557 seq_printf(seq, "%s ",
558 print_mac(mac, is_zero_ether_addr(pkt_dev->src_mac) ?
559 pkt_dev->odev->dev_addr : pkt_dev->src_mac));
560
561 seq_printf(seq, "dst_mac: ");
562 seq_printf(seq, "%s\n", print_mac(mac, pkt_dev->dst_mac));
563
564 seq_printf(seq,
565 " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n",
566 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
567 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
568
569 seq_printf(seq,
570 " src_mac_count: %d dst_mac_count: %d\n",
571 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
572
573 if (pkt_dev->nr_labels) {
574 unsigned i;
575 seq_printf(seq, " mpls: ");
576 for (i = 0; i < pkt_dev->nr_labels; i++)
577 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
578 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
579 }
580
581 if (pkt_dev->vlan_id != 0xffff) {
582 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
583 pkt_dev->vlan_id, pkt_dev->vlan_p, pkt_dev->vlan_cfi);
584 }
585
586 if (pkt_dev->svlan_id != 0xffff) {
587 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
588 pkt_dev->svlan_id, pkt_dev->svlan_p, pkt_dev->svlan_cfi);
589 }
590
591 if (pkt_dev->tos) {
592 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
593 }
594
595 if (pkt_dev->traffic_class) {
596 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
597 }
598
599 seq_printf(seq, " Flags: ");
600
601 if (pkt_dev->flags & F_IPV6)
602 seq_printf(seq, "IPV6 ");
603
604 if (pkt_dev->flags & F_IPSRC_RND)
605 seq_printf(seq, "IPSRC_RND ");
606
607 if (pkt_dev->flags & F_IPDST_RND)
608 seq_printf(seq, "IPDST_RND ");
609
610 if (pkt_dev->flags & F_TXSIZE_RND)
611 seq_printf(seq, "TXSIZE_RND ");
612
613 if (pkt_dev->flags & F_UDPSRC_RND)
614 seq_printf(seq, "UDPSRC_RND ");
615
616 if (pkt_dev->flags & F_UDPDST_RND)
617 seq_printf(seq, "UDPDST_RND ");
618
619 if (pkt_dev->flags & F_MPLS_RND)
620 seq_printf(seq, "MPLS_RND ");
621
622 if (pkt_dev->flags & F_QUEUE_MAP_RND)
623 seq_printf(seq, "QUEUE_MAP_RND ");
624
625 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
626 seq_printf(seq, "QUEUE_MAP_CPU ");
627
628 if (pkt_dev->cflows) {
629 if (pkt_dev->flags & F_FLOW_SEQ)
630 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
631 else
632 seq_printf(seq, "FLOW_RND ");
633 }
634
635 #ifdef CONFIG_XFRM
636 if (pkt_dev->flags & F_IPSEC_ON)
637 seq_printf(seq, "IPSEC ");
638 #endif
639
640 if (pkt_dev->flags & F_MACSRC_RND)
641 seq_printf(seq, "MACSRC_RND ");
642
643 if (pkt_dev->flags & F_MACDST_RND)
644 seq_printf(seq, "MACDST_RND ");
645
646 if (pkt_dev->flags & F_VID_RND)
647 seq_printf(seq, "VID_RND ");
648
649 if (pkt_dev->flags & F_SVID_RND)
650 seq_printf(seq, "SVID_RND ");
651
652 seq_puts(seq, "\n");
653
654 sa = pkt_dev->started_at;
655 stopped = pkt_dev->stopped_at;
656 if (pkt_dev->running)
657 stopped = now; /* not really stopped, more like last-running-at */
658
659 seq_printf(seq,
660 "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n",
661 (unsigned long long)pkt_dev->sofar,
662 (unsigned long long)pkt_dev->errors, (unsigned long long)sa,
663 (unsigned long long)stopped,
664 (unsigned long long)pkt_dev->idle_acc);
665
666 seq_printf(seq,
667 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
668 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
669 pkt_dev->cur_src_mac_offset);
670
671 if (pkt_dev->flags & F_IPV6) {
672 char b1[128], b2[128];
673 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
674 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
675 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
676 } else
677 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
678 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
679
680 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
681 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
682
683 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
684
685 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
686
687 if (pkt_dev->result[0])
688 seq_printf(seq, "Result: %s\n", pkt_dev->result);
689 else
690 seq_printf(seq, "Result: Idle\n");
691
692 return 0;
693 }
694
695
696 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, __u32 *num)
697 {
698 int i = 0;
699 *num = 0;
700
701 for (; i < maxlen; i++) {
702 char c;
703 *num <<= 4;
704 if (get_user(c, &user_buffer[i]))
705 return -EFAULT;
706 if ((c >= '0') && (c <= '9'))
707 *num |= c - '0';
708 else if ((c >= 'a') && (c <= 'f'))
709 *num |= c - 'a' + 10;
710 else if ((c >= 'A') && (c <= 'F'))
711 *num |= c - 'A' + 10;
712 else
713 break;
714 }
715 return i;
716 }
717
718 static int count_trail_chars(const char __user * user_buffer,
719 unsigned int maxlen)
720 {
721 int i;
722
723 for (i = 0; i < maxlen; i++) {
724 char c;
725 if (get_user(c, &user_buffer[i]))
726 return -EFAULT;
727 switch (c) {
728 case '\"':
729 case '\n':
730 case '\r':
731 case '\t':
732 case ' ':
733 case '=':
734 break;
735 default:
736 goto done;
737 }
738 }
739 done:
740 return i;
741 }
742
743 static unsigned long num_arg(const char __user * user_buffer,
744 unsigned long maxlen, unsigned long *num)
745 {
746 int i = 0;
747 *num = 0;
748
749 for (; i < maxlen; i++) {
750 char c;
751 if (get_user(c, &user_buffer[i]))
752 return -EFAULT;
753 if ((c >= '0') && (c <= '9')) {
754 *num *= 10;
755 *num += c - '0';
756 } else
757 break;
758 }
759 return i;
760 }
761
762 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
763 {
764 int i = 0;
765
766 for (; i < maxlen; i++) {
767 char c;
768 if (get_user(c, &user_buffer[i]))
769 return -EFAULT;
770 switch (c) {
771 case '\"':
772 case '\n':
773 case '\r':
774 case '\t':
775 case ' ':
776 goto done_str;
777 break;
778 default:
779 break;
780 }
781 }
782 done_str:
783 return i;
784 }
785
786 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
787 {
788 unsigned n = 0;
789 char c;
790 ssize_t i = 0;
791 int len;
792
793 pkt_dev->nr_labels = 0;
794 do {
795 __u32 tmp;
796 len = hex32_arg(&buffer[i], 8, &tmp);
797 if (len <= 0)
798 return len;
799 pkt_dev->labels[n] = htonl(tmp);
800 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
801 pkt_dev->flags |= F_MPLS_RND;
802 i += len;
803 if (get_user(c, &buffer[i]))
804 return -EFAULT;
805 i++;
806 n++;
807 if (n >= MAX_MPLS_LABELS)
808 return -E2BIG;
809 } while (c == ',');
810
811 pkt_dev->nr_labels = n;
812 return i;
813 }
814
815 static ssize_t pktgen_if_write(struct file *file,
816 const char __user * user_buffer, size_t count,
817 loff_t * offset)
818 {
819 struct seq_file *seq = (struct seq_file *)file->private_data;
820 struct pktgen_dev *pkt_dev = seq->private;
821 int i = 0, max, len;
822 char name[16], valstr[32];
823 unsigned long value = 0;
824 char *pg_result = NULL;
825 int tmp = 0;
826 char buf[128];
827
828 pg_result = &(pkt_dev->result[0]);
829
830 if (count < 1) {
831 printk(KERN_WARNING "pktgen: wrong command format\n");
832 return -EINVAL;
833 }
834
835 max = count - i;
836 tmp = count_trail_chars(&user_buffer[i], max);
837 if (tmp < 0) {
838 printk(KERN_WARNING "pktgen: illegal format\n");
839 return tmp;
840 }
841 i += tmp;
842
843 /* Read variable name */
844
845 len = strn_len(&user_buffer[i], sizeof(name) - 1);
846 if (len < 0) {
847 return len;
848 }
849 memset(name, 0, sizeof(name));
850 if (copy_from_user(name, &user_buffer[i], len))
851 return -EFAULT;
852 i += len;
853
854 max = count - i;
855 len = count_trail_chars(&user_buffer[i], max);
856 if (len < 0)
857 return len;
858
859 i += len;
860
861 if (debug) {
862 char tb[count + 1];
863 if (copy_from_user(tb, user_buffer, count))
864 return -EFAULT;
865 tb[count] = 0;
866 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name,
867 (unsigned long)count, tb);
868 }
869
870 if (!strcmp(name, "min_pkt_size")) {
871 len = num_arg(&user_buffer[i], 10, &value);
872 if (len < 0) {
873 return len;
874 }
875 i += len;
876 if (value < 14 + 20 + 8)
877 value = 14 + 20 + 8;
878 if (value != pkt_dev->min_pkt_size) {
879 pkt_dev->min_pkt_size = value;
880 pkt_dev->cur_pkt_size = value;
881 }
882 sprintf(pg_result, "OK: min_pkt_size=%u",
883 pkt_dev->min_pkt_size);
884 return count;
885 }
886
887 if (!strcmp(name, "max_pkt_size")) {
888 len = num_arg(&user_buffer[i], 10, &value);
889 if (len < 0) {
890 return len;
891 }
892 i += len;
893 if (value < 14 + 20 + 8)
894 value = 14 + 20 + 8;
895 if (value != pkt_dev->max_pkt_size) {
896 pkt_dev->max_pkt_size = value;
897 pkt_dev->cur_pkt_size = value;
898 }
899 sprintf(pg_result, "OK: max_pkt_size=%u",
900 pkt_dev->max_pkt_size);
901 return count;
902 }
903
904 /* Shortcut for min = max */
905
906 if (!strcmp(name, "pkt_size")) {
907 len = num_arg(&user_buffer[i], 10, &value);
908 if (len < 0) {
909 return len;
910 }
911 i += len;
912 if (value < 14 + 20 + 8)
913 value = 14 + 20 + 8;
914 if (value != pkt_dev->min_pkt_size) {
915 pkt_dev->min_pkt_size = value;
916 pkt_dev->max_pkt_size = value;
917 pkt_dev->cur_pkt_size = value;
918 }
919 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
920 return count;
921 }
922
923 if (!strcmp(name, "debug")) {
924 len = num_arg(&user_buffer[i], 10, &value);
925 if (len < 0) {
926 return len;
927 }
928 i += len;
929 debug = value;
930 sprintf(pg_result, "OK: debug=%u", debug);
931 return count;
932 }
933
934 if (!strcmp(name, "frags")) {
935 len = num_arg(&user_buffer[i], 10, &value);
936 if (len < 0) {
937 return len;
938 }
939 i += len;
940 pkt_dev->nfrags = value;
941 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
942 return count;
943 }
944 if (!strcmp(name, "delay")) {
945 len = num_arg(&user_buffer[i], 10, &value);
946 if (len < 0) {
947 return len;
948 }
949 i += len;
950 if (value == 0x7FFFFFFF) {
951 pkt_dev->delay_us = 0x7FFFFFFF;
952 pkt_dev->delay_ns = 0;
953 } else {
954 pkt_dev->delay_us = value / 1000;
955 pkt_dev->delay_ns = value % 1000;
956 }
957 sprintf(pg_result, "OK: delay=%u",
958 1000 * pkt_dev->delay_us + pkt_dev->delay_ns);
959 return count;
960 }
961 if (!strcmp(name, "udp_src_min")) {
962 len = num_arg(&user_buffer[i], 10, &value);
963 if (len < 0) {
964 return len;
965 }
966 i += len;
967 if (value != pkt_dev->udp_src_min) {
968 pkt_dev->udp_src_min = value;
969 pkt_dev->cur_udp_src = value;
970 }
971 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
972 return count;
973 }
974 if (!strcmp(name, "udp_dst_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_dst_min) {
981 pkt_dev->udp_dst_min = value;
982 pkt_dev->cur_udp_dst = value;
983 }
984 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
985 return count;
986 }
987 if (!strcmp(name, "udp_src_max")) {
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_src_max) {
994 pkt_dev->udp_src_max = value;
995 pkt_dev->cur_udp_src = value;
996 }
997 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
998 return count;
999 }
1000 if (!strcmp(name, "udp_dst_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_dst_max) {
1007 pkt_dev->udp_dst_max = value;
1008 pkt_dev->cur_udp_dst = value;
1009 }
1010 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1011 return count;
1012 }
1013 if (!strcmp(name, "clone_skb")) {
1014 len = num_arg(&user_buffer[i], 10, &value);
1015 if (len < 0) {
1016 return len;
1017 }
1018 i += len;
1019 pkt_dev->clone_skb = value;
1020
1021 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1022 return count;
1023 }
1024 if (!strcmp(name, "count")) {
1025 len = num_arg(&user_buffer[i], 10, &value);
1026 if (len < 0) {
1027 return len;
1028 }
1029 i += len;
1030 pkt_dev->count = value;
1031 sprintf(pg_result, "OK: count=%llu",
1032 (unsigned long long)pkt_dev->count);
1033 return count;
1034 }
1035 if (!strcmp(name, "src_mac_count")) {
1036 len = num_arg(&user_buffer[i], 10, &value);
1037 if (len < 0) {
1038 return len;
1039 }
1040 i += len;
1041 if (pkt_dev->src_mac_count != value) {
1042 pkt_dev->src_mac_count = value;
1043 pkt_dev->cur_src_mac_offset = 0;
1044 }
1045 sprintf(pg_result, "OK: src_mac_count=%d",
1046 pkt_dev->src_mac_count);
1047 return count;
1048 }
1049 if (!strcmp(name, "dst_mac_count")) {
1050 len = num_arg(&user_buffer[i], 10, &value);
1051 if (len < 0) {
1052 return len;
1053 }
1054 i += len;
1055 if (pkt_dev->dst_mac_count != value) {
1056 pkt_dev->dst_mac_count = value;
1057 pkt_dev->cur_dst_mac_offset = 0;
1058 }
1059 sprintf(pg_result, "OK: dst_mac_count=%d",
1060 pkt_dev->dst_mac_count);
1061 return count;
1062 }
1063 if (!strcmp(name, "flag")) {
1064 char f[32];
1065 memset(f, 0, 32);
1066 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1067 if (len < 0) {
1068 return len;
1069 }
1070 if (copy_from_user(f, &user_buffer[i], len))
1071 return -EFAULT;
1072 i += len;
1073 if (strcmp(f, "IPSRC_RND") == 0)
1074 pkt_dev->flags |= F_IPSRC_RND;
1075
1076 else if (strcmp(f, "!IPSRC_RND") == 0)
1077 pkt_dev->flags &= ~F_IPSRC_RND;
1078
1079 else if (strcmp(f, "TXSIZE_RND") == 0)
1080 pkt_dev->flags |= F_TXSIZE_RND;
1081
1082 else if (strcmp(f, "!TXSIZE_RND") == 0)
1083 pkt_dev->flags &= ~F_TXSIZE_RND;
1084
1085 else if (strcmp(f, "IPDST_RND") == 0)
1086 pkt_dev->flags |= F_IPDST_RND;
1087
1088 else if (strcmp(f, "!IPDST_RND") == 0)
1089 pkt_dev->flags &= ~F_IPDST_RND;
1090
1091 else if (strcmp(f, "UDPSRC_RND") == 0)
1092 pkt_dev->flags |= F_UDPSRC_RND;
1093
1094 else if (strcmp(f, "!UDPSRC_RND") == 0)
1095 pkt_dev->flags &= ~F_UDPSRC_RND;
1096
1097 else if (strcmp(f, "UDPDST_RND") == 0)
1098 pkt_dev->flags |= F_UDPDST_RND;
1099
1100 else if (strcmp(f, "!UDPDST_RND") == 0)
1101 pkt_dev->flags &= ~F_UDPDST_RND;
1102
1103 else if (strcmp(f, "MACSRC_RND") == 0)
1104 pkt_dev->flags |= F_MACSRC_RND;
1105
1106 else if (strcmp(f, "!MACSRC_RND") == 0)
1107 pkt_dev->flags &= ~F_MACSRC_RND;
1108
1109 else if (strcmp(f, "MACDST_RND") == 0)
1110 pkt_dev->flags |= F_MACDST_RND;
1111
1112 else if (strcmp(f, "!MACDST_RND") == 0)
1113 pkt_dev->flags &= ~F_MACDST_RND;
1114
1115 else if (strcmp(f, "MPLS_RND") == 0)
1116 pkt_dev->flags |= F_MPLS_RND;
1117
1118 else if (strcmp(f, "!MPLS_RND") == 0)
1119 pkt_dev->flags &= ~F_MPLS_RND;
1120
1121 else if (strcmp(f, "VID_RND") == 0)
1122 pkt_dev->flags |= F_VID_RND;
1123
1124 else if (strcmp(f, "!VID_RND") == 0)
1125 pkt_dev->flags &= ~F_VID_RND;
1126
1127 else if (strcmp(f, "SVID_RND") == 0)
1128 pkt_dev->flags |= F_SVID_RND;
1129
1130 else if (strcmp(f, "!SVID_RND") == 0)
1131 pkt_dev->flags &= ~F_SVID_RND;
1132
1133 else if (strcmp(f, "FLOW_SEQ") == 0)
1134 pkt_dev->flags |= F_FLOW_SEQ;
1135
1136 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1137 pkt_dev->flags |= F_QUEUE_MAP_RND;
1138
1139 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1140 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1141
1142 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1143 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1144
1145 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1146 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1147 #ifdef CONFIG_XFRM
1148 else if (strcmp(f, "IPSEC") == 0)
1149 pkt_dev->flags |= F_IPSEC_ON;
1150 #endif
1151
1152 else if (strcmp(f, "!IPV6") == 0)
1153 pkt_dev->flags &= ~F_IPV6;
1154
1155 else {
1156 sprintf(pg_result,
1157 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1158 f,
1159 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1160 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC\n");
1161 return count;
1162 }
1163 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1164 return count;
1165 }
1166 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1167 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1168 if (len < 0) {
1169 return len;
1170 }
1171
1172 if (copy_from_user(buf, &user_buffer[i], len))
1173 return -EFAULT;
1174 buf[len] = 0;
1175 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1176 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1177 strncpy(pkt_dev->dst_min, buf, len);
1178 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1179 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1180 }
1181 if (debug)
1182 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1183 pkt_dev->dst_min);
1184 i += len;
1185 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1186 return count;
1187 }
1188 if (!strcmp(name, "dst_max")) {
1189 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1190 if (len < 0) {
1191 return len;
1192 }
1193
1194 if (copy_from_user(buf, &user_buffer[i], len))
1195 return -EFAULT;
1196
1197 buf[len] = 0;
1198 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1199 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1200 strncpy(pkt_dev->dst_max, buf, len);
1201 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1202 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1203 }
1204 if (debug)
1205 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1206 pkt_dev->dst_max);
1207 i += len;
1208 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1209 return count;
1210 }
1211 if (!strcmp(name, "dst6")) {
1212 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1213 if (len < 0)
1214 return len;
1215
1216 pkt_dev->flags |= F_IPV6;
1217
1218 if (copy_from_user(buf, &user_buffer[i], len))
1219 return -EFAULT;
1220 buf[len] = 0;
1221
1222 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1223 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1224
1225 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1226
1227 if (debug)
1228 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1229
1230 i += len;
1231 sprintf(pg_result, "OK: dst6=%s", buf);
1232 return count;
1233 }
1234 if (!strcmp(name, "dst6_min")) {
1235 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1236 if (len < 0)
1237 return len;
1238
1239 pkt_dev->flags |= F_IPV6;
1240
1241 if (copy_from_user(buf, &user_buffer[i], len))
1242 return -EFAULT;
1243 buf[len] = 0;
1244
1245 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1246 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1247
1248 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1249 &pkt_dev->min_in6_daddr);
1250 if (debug)
1251 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1252
1253 i += len;
1254 sprintf(pg_result, "OK: dst6_min=%s", buf);
1255 return count;
1256 }
1257 if (!strcmp(name, "dst6_max")) {
1258 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1259 if (len < 0)
1260 return len;
1261
1262 pkt_dev->flags |= F_IPV6;
1263
1264 if (copy_from_user(buf, &user_buffer[i], len))
1265 return -EFAULT;
1266 buf[len] = 0;
1267
1268 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1269 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1270
1271 if (debug)
1272 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1273
1274 i += len;
1275 sprintf(pg_result, "OK: dst6_max=%s", buf);
1276 return count;
1277 }
1278 if (!strcmp(name, "src6")) {
1279 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1280 if (len < 0)
1281 return len;
1282
1283 pkt_dev->flags |= F_IPV6;
1284
1285 if (copy_from_user(buf, &user_buffer[i], len))
1286 return -EFAULT;
1287 buf[len] = 0;
1288
1289 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1290 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1291
1292 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1293
1294 if (debug)
1295 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1296
1297 i += len;
1298 sprintf(pg_result, "OK: src6=%s", buf);
1299 return count;
1300 }
1301 if (!strcmp(name, "src_min")) {
1302 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1303 if (len < 0) {
1304 return len;
1305 }
1306 if (copy_from_user(buf, &user_buffer[i], len))
1307 return -EFAULT;
1308 buf[len] = 0;
1309 if (strcmp(buf, pkt_dev->src_min) != 0) {
1310 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1311 strncpy(pkt_dev->src_min, buf, len);
1312 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1313 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1314 }
1315 if (debug)
1316 printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1317 pkt_dev->src_min);
1318 i += len;
1319 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1320 return count;
1321 }
1322 if (!strcmp(name, "src_max")) {
1323 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1324 if (len < 0) {
1325 return len;
1326 }
1327 if (copy_from_user(buf, &user_buffer[i], len))
1328 return -EFAULT;
1329 buf[len] = 0;
1330 if (strcmp(buf, pkt_dev->src_max) != 0) {
1331 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1332 strncpy(pkt_dev->src_max, buf, len);
1333 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1334 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1335 }
1336 if (debug)
1337 printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1338 pkt_dev->src_max);
1339 i += len;
1340 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1341 return count;
1342 }
1343 if (!strcmp(name, "dst_mac")) {
1344 char *v = valstr;
1345 unsigned char old_dmac[ETH_ALEN];
1346 unsigned char *m = pkt_dev->dst_mac;
1347 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1348
1349 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1350 if (len < 0) {
1351 return len;
1352 }
1353 memset(valstr, 0, sizeof(valstr));
1354 if (copy_from_user(valstr, &user_buffer[i], len))
1355 return -EFAULT;
1356 i += len;
1357
1358 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1359 if (*v >= '0' && *v <= '9') {
1360 *m *= 16;
1361 *m += *v - '0';
1362 }
1363 if (*v >= 'A' && *v <= 'F') {
1364 *m *= 16;
1365 *m += *v - 'A' + 10;
1366 }
1367 if (*v >= 'a' && *v <= 'f') {
1368 *m *= 16;
1369 *m += *v - 'a' + 10;
1370 }
1371 if (*v == ':') {
1372 m++;
1373 *m = 0;
1374 }
1375 }
1376
1377 /* Set up Dest MAC */
1378 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1379 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1380
1381 sprintf(pg_result, "OK: dstmac");
1382 return count;
1383 }
1384 if (!strcmp(name, "src_mac")) {
1385 char *v = valstr;
1386 unsigned char old_smac[ETH_ALEN];
1387 unsigned char *m = pkt_dev->src_mac;
1388
1389 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN);
1390
1391 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1392 if (len < 0) {
1393 return len;
1394 }
1395 memset(valstr, 0, sizeof(valstr));
1396 if (copy_from_user(valstr, &user_buffer[i], len))
1397 return -EFAULT;
1398 i += len;
1399
1400 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1401 if (*v >= '0' && *v <= '9') {
1402 *m *= 16;
1403 *m += *v - '0';
1404 }
1405 if (*v >= 'A' && *v <= 'F') {
1406 *m *= 16;
1407 *m += *v - 'A' + 10;
1408 }
1409 if (*v >= 'a' && *v <= 'f') {
1410 *m *= 16;
1411 *m += *v - 'a' + 10;
1412 }
1413 if (*v == ':') {
1414 m++;
1415 *m = 0;
1416 }
1417 }
1418
1419 /* Set up Src MAC */
1420 if (compare_ether_addr(old_smac, pkt_dev->src_mac))
1421 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN);
1422
1423 sprintf(pg_result, "OK: srcmac");
1424 return count;
1425 }
1426
1427 if (!strcmp(name, "clear_counters")) {
1428 pktgen_clear_counters(pkt_dev);
1429 sprintf(pg_result, "OK: Clearing counters.\n");
1430 return count;
1431 }
1432
1433 if (!strcmp(name, "flows")) {
1434 len = num_arg(&user_buffer[i], 10, &value);
1435 if (len < 0) {
1436 return len;
1437 }
1438 i += len;
1439 if (value > MAX_CFLOWS)
1440 value = MAX_CFLOWS;
1441
1442 pkt_dev->cflows = value;
1443 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1444 return count;
1445 }
1446
1447 if (!strcmp(name, "flowlen")) {
1448 len = num_arg(&user_buffer[i], 10, &value);
1449 if (len < 0) {
1450 return len;
1451 }
1452 i += len;
1453 pkt_dev->lflow = value;
1454 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1455 return count;
1456 }
1457
1458 if (!strcmp(name, "queue_map_min")) {
1459 len = num_arg(&user_buffer[i], 5, &value);
1460 if (len < 0) {
1461 return len;
1462 }
1463 i += len;
1464 pkt_dev->queue_map_min = value;
1465 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1466 return count;
1467 }
1468
1469 if (!strcmp(name, "queue_map_max")) {
1470 len = num_arg(&user_buffer[i], 5, &value);
1471 if (len < 0) {
1472 return len;
1473 }
1474 i += len;
1475 pkt_dev->queue_map_max = value;
1476 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1477 return count;
1478 }
1479
1480 if (!strcmp(name, "mpls")) {
1481 unsigned n, cnt;
1482
1483 len = get_labels(&user_buffer[i], pkt_dev);
1484 if (len < 0)
1485 return len;
1486 i += len;
1487 cnt = sprintf(pg_result, "OK: mpls=");
1488 for (n = 0; n < pkt_dev->nr_labels; n++)
1489 cnt += sprintf(pg_result + cnt,
1490 "%08x%s", ntohl(pkt_dev->labels[n]),
1491 n == pkt_dev->nr_labels-1 ? "" : ",");
1492
1493 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1494 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1495 pkt_dev->svlan_id = 0xffff;
1496
1497 if (debug)
1498 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1499 }
1500 return count;
1501 }
1502
1503 if (!strcmp(name, "vlan_id")) {
1504 len = num_arg(&user_buffer[i], 4, &value);
1505 if (len < 0) {
1506 return len;
1507 }
1508 i += len;
1509 if (value <= 4095) {
1510 pkt_dev->vlan_id = value; /* turn on VLAN */
1511
1512 if (debug)
1513 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1514
1515 if (debug && pkt_dev->nr_labels)
1516 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1517
1518 pkt_dev->nr_labels = 0; /* turn off MPLS */
1519 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1520 } else {
1521 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1522 pkt_dev->svlan_id = 0xffff;
1523
1524 if (debug)
1525 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1526 }
1527 return count;
1528 }
1529
1530 if (!strcmp(name, "vlan_p")) {
1531 len = num_arg(&user_buffer[i], 1, &value);
1532 if (len < 0) {
1533 return len;
1534 }
1535 i += len;
1536 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1537 pkt_dev->vlan_p = value;
1538 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1539 } else {
1540 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1541 }
1542 return count;
1543 }
1544
1545 if (!strcmp(name, "vlan_cfi")) {
1546 len = num_arg(&user_buffer[i], 1, &value);
1547 if (len < 0) {
1548 return len;
1549 }
1550 i += len;
1551 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1552 pkt_dev->vlan_cfi = value;
1553 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1554 } else {
1555 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1556 }
1557 return count;
1558 }
1559
1560 if (!strcmp(name, "svlan_id")) {
1561 len = num_arg(&user_buffer[i], 4, &value);
1562 if (len < 0) {
1563 return len;
1564 }
1565 i += len;
1566 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1567 pkt_dev->svlan_id = value; /* turn on SVLAN */
1568
1569 if (debug)
1570 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1571
1572 if (debug && pkt_dev->nr_labels)
1573 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1574
1575 pkt_dev->nr_labels = 0; /* turn off MPLS */
1576 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1577 } else {
1578 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1579 pkt_dev->svlan_id = 0xffff;
1580
1581 if (debug)
1582 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1583 }
1584 return count;
1585 }
1586
1587 if (!strcmp(name, "svlan_p")) {
1588 len = num_arg(&user_buffer[i], 1, &value);
1589 if (len < 0) {
1590 return len;
1591 }
1592 i += len;
1593 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1594 pkt_dev->svlan_p = value;
1595 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1596 } else {
1597 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1598 }
1599 return count;
1600 }
1601
1602 if (!strcmp(name, "svlan_cfi")) {
1603 len = num_arg(&user_buffer[i], 1, &value);
1604 if (len < 0) {
1605 return len;
1606 }
1607 i += len;
1608 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1609 pkt_dev->svlan_cfi = value;
1610 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1611 } else {
1612 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1613 }
1614 return count;
1615 }
1616
1617 if (!strcmp(name, "tos")) {
1618 __u32 tmp_value = 0;
1619 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1620 if (len < 0) {
1621 return len;
1622 }
1623 i += len;
1624 if (len == 2) {
1625 pkt_dev->tos = tmp_value;
1626 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1627 } else {
1628 sprintf(pg_result, "ERROR: tos must be 00-ff");
1629 }
1630 return count;
1631 }
1632
1633 if (!strcmp(name, "traffic_class")) {
1634 __u32 tmp_value = 0;
1635 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1636 if (len < 0) {
1637 return len;
1638 }
1639 i += len;
1640 if (len == 2) {
1641 pkt_dev->traffic_class = tmp_value;
1642 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1643 } else {
1644 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1645 }
1646 return count;
1647 }
1648
1649 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1650 return -EINVAL;
1651 }
1652
1653 static int pktgen_if_open(struct inode *inode, struct file *file)
1654 {
1655 return single_open(file, pktgen_if_show, PDE(inode)->data);
1656 }
1657
1658 static const struct file_operations pktgen_if_fops = {
1659 .owner = THIS_MODULE,
1660 .open = pktgen_if_open,
1661 .read = seq_read,
1662 .llseek = seq_lseek,
1663 .write = pktgen_if_write,
1664 .release = single_release,
1665 };
1666
1667 static int pktgen_thread_show(struct seq_file *seq, void *v)
1668 {
1669 struct pktgen_thread *t = seq->private;
1670 struct pktgen_dev *pkt_dev;
1671
1672 BUG_ON(!t);
1673
1674 seq_printf(seq, "Running: ");
1675
1676 if_lock(t);
1677 list_for_each_entry(pkt_dev, &t->if_list, list)
1678 if (pkt_dev->running)
1679 seq_printf(seq, "%s ", pkt_dev->odev->name);
1680
1681 seq_printf(seq, "\nStopped: ");
1682
1683 list_for_each_entry(pkt_dev, &t->if_list, list)
1684 if (!pkt_dev->running)
1685 seq_printf(seq, "%s ", pkt_dev->odev->name);
1686
1687 if (t->result[0])
1688 seq_printf(seq, "\nResult: %s\n", t->result);
1689 else
1690 seq_printf(seq, "\nResult: NA\n");
1691
1692 if_unlock(t);
1693
1694 return 0;
1695 }
1696
1697 static ssize_t pktgen_thread_write(struct file *file,
1698 const char __user * user_buffer,
1699 size_t count, loff_t * offset)
1700 {
1701 struct seq_file *seq = (struct seq_file *)file->private_data;
1702 struct pktgen_thread *t = seq->private;
1703 int i = 0, max, len, ret;
1704 char name[40];
1705 char *pg_result;
1706
1707 if (count < 1) {
1708 // sprintf(pg_result, "Wrong command format");
1709 return -EINVAL;
1710 }
1711
1712 max = count - i;
1713 len = count_trail_chars(&user_buffer[i], max);
1714 if (len < 0)
1715 return len;
1716
1717 i += len;
1718
1719 /* Read variable name */
1720
1721 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1722 if (len < 0)
1723 return len;
1724
1725 memset(name, 0, sizeof(name));
1726 if (copy_from_user(name, &user_buffer[i], len))
1727 return -EFAULT;
1728 i += len;
1729
1730 max = count - i;
1731 len = count_trail_chars(&user_buffer[i], max);
1732 if (len < 0)
1733 return len;
1734
1735 i += len;
1736
1737 if (debug)
1738 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1739 name, (unsigned long)count);
1740
1741 if (!t) {
1742 printk(KERN_ERR "pktgen: ERROR: No thread\n");
1743 ret = -EINVAL;
1744 goto out;
1745 }
1746
1747 pg_result = &(t->result[0]);
1748
1749 if (!strcmp(name, "add_device")) {
1750 char f[32];
1751 memset(f, 0, 32);
1752 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1753 if (len < 0) {
1754 ret = len;
1755 goto out;
1756 }
1757 if (copy_from_user(f, &user_buffer[i], len))
1758 return -EFAULT;
1759 i += len;
1760 mutex_lock(&pktgen_thread_lock);
1761 pktgen_add_device(t, f);
1762 mutex_unlock(&pktgen_thread_lock);
1763 ret = count;
1764 sprintf(pg_result, "OK: add_device=%s", f);
1765 goto out;
1766 }
1767
1768 if (!strcmp(name, "rem_device_all")) {
1769 mutex_lock(&pktgen_thread_lock);
1770 t->control |= T_REMDEVALL;
1771 mutex_unlock(&pktgen_thread_lock);
1772 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1773 ret = count;
1774 sprintf(pg_result, "OK: rem_device_all");
1775 goto out;
1776 }
1777
1778 if (!strcmp(name, "max_before_softirq")) {
1779 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1780 ret = count;
1781 goto out;
1782 }
1783
1784 ret = -EINVAL;
1785 out:
1786 return ret;
1787 }
1788
1789 static int pktgen_thread_open(struct inode *inode, struct file *file)
1790 {
1791 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1792 }
1793
1794 static const struct file_operations pktgen_thread_fops = {
1795 .owner = THIS_MODULE,
1796 .open = pktgen_thread_open,
1797 .read = seq_read,
1798 .llseek = seq_lseek,
1799 .write = pktgen_thread_write,
1800 .release = single_release,
1801 };
1802
1803 /* Think find or remove for NN */
1804 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1805 {
1806 struct pktgen_thread *t;
1807 struct pktgen_dev *pkt_dev = NULL;
1808
1809 list_for_each_entry(t, &pktgen_threads, th_list) {
1810 pkt_dev = pktgen_find_dev(t, ifname);
1811 if (pkt_dev) {
1812 if (remove) {
1813 if_lock(t);
1814 pkt_dev->removal_mark = 1;
1815 t->control |= T_REMDEV;
1816 if_unlock(t);
1817 }
1818 break;
1819 }
1820 }
1821 return pkt_dev;
1822 }
1823
1824 /*
1825 * mark a device for removal
1826 */
1827 static void pktgen_mark_device(const char *ifname)
1828 {
1829 struct pktgen_dev *pkt_dev = NULL;
1830 const int max_tries = 10, msec_per_try = 125;
1831 int i = 0;
1832
1833 mutex_lock(&pktgen_thread_lock);
1834 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname);
1835
1836 while (1) {
1837
1838 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1839 if (pkt_dev == NULL)
1840 break; /* success */
1841
1842 mutex_unlock(&pktgen_thread_lock);
1843 pr_debug("pktgen: pktgen_mark_device waiting for %s "
1844 "to disappear....\n", ifname);
1845 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1846 mutex_lock(&pktgen_thread_lock);
1847
1848 if (++i >= max_tries) {
1849 printk(KERN_ERR "pktgen_mark_device: timed out after "
1850 "waiting %d msec for device %s to be removed\n",
1851 msec_per_try * i, ifname);
1852 break;
1853 }
1854
1855 }
1856
1857 mutex_unlock(&pktgen_thread_lock);
1858 }
1859
1860 static void pktgen_change_name(struct net_device *dev)
1861 {
1862 struct pktgen_thread *t;
1863
1864 list_for_each_entry(t, &pktgen_threads, th_list) {
1865 struct pktgen_dev *pkt_dev;
1866
1867 list_for_each_entry(pkt_dev, &t->if_list, list) {
1868 if (pkt_dev->odev != dev)
1869 continue;
1870
1871 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1872
1873 pkt_dev->entry = create_proc_entry(dev->name, 0600,
1874 pg_proc_dir);
1875 if (!pkt_dev->entry)
1876 printk(KERN_ERR "pktgen: can't move proc "
1877 " entry for '%s'\n", dev->name);
1878 break;
1879 }
1880 }
1881 }
1882
1883 static int pktgen_device_event(struct notifier_block *unused,
1884 unsigned long event, void *ptr)
1885 {
1886 struct net_device *dev = ptr;
1887
1888 if (!net_eq(dev_net(dev), &init_net))
1889 return NOTIFY_DONE;
1890
1891 /* It is OK that we do not hold the group lock right now,
1892 * as we run under the RTNL lock.
1893 */
1894
1895 switch (event) {
1896 case NETDEV_CHANGENAME:
1897 pktgen_change_name(dev);
1898 break;
1899
1900 case NETDEV_UNREGISTER:
1901 pktgen_mark_device(dev->name);
1902 break;
1903 }
1904
1905 return NOTIFY_DONE;
1906 }
1907
1908 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev, const char *ifname)
1909 {
1910 char b[IFNAMSIZ+5];
1911 int i = 0;
1912
1913 for(i=0; ifname[i] != '@'; i++) {
1914 if(i == IFNAMSIZ)
1915 break;
1916
1917 b[i] = ifname[i];
1918 }
1919 b[i] = 0;
1920
1921 return dev_get_by_name(&init_net, b);
1922 }
1923
1924
1925 /* Associate pktgen_dev with a device. */
1926
1927 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1928 {
1929 struct net_device *odev;
1930 int err;
1931
1932 /* Clean old setups */
1933 if (pkt_dev->odev) {
1934 dev_put(pkt_dev->odev);
1935 pkt_dev->odev = NULL;
1936 }
1937
1938 odev = pktgen_dev_get_by_name(pkt_dev, ifname);
1939 if (!odev) {
1940 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname);
1941 return -ENODEV;
1942 }
1943
1944 if (odev->type != ARPHRD_ETHER) {
1945 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname);
1946 err = -EINVAL;
1947 } else if (!netif_running(odev)) {
1948 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname);
1949 err = -ENETDOWN;
1950 } else {
1951 pkt_dev->odev = odev;
1952 return 0;
1953 }
1954
1955 dev_put(odev);
1956 return err;
1957 }
1958
1959 /* Read pkt_dev from the interface and set up internal pktgen_dev
1960 * structure to have the right information to create/send packets
1961 */
1962 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
1963 {
1964 int ntxq;
1965
1966 if (!pkt_dev->odev) {
1967 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in "
1968 "setup_inject.\n");
1969 sprintf(pkt_dev->result,
1970 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1971 return;
1972 }
1973
1974 /* make sure that we don't pick a non-existing transmit queue */
1975 ntxq = pkt_dev->odev->real_num_tx_queues;
1976 if (ntxq > num_online_cpus() && (pkt_dev->flags & F_QUEUE_MAP_CPU)) {
1977 printk(KERN_WARNING "pktgen: WARNING: QUEUE_MAP_CPU "
1978 "disabled because CPU count (%d) exceeds number "
1979 "of tx queues (%d) on %s\n", num_online_cpus(), ntxq,
1980 pkt_dev->odev->name);
1981 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1982 }
1983 if (ntxq <= pkt_dev->queue_map_min) {
1984 printk(KERN_WARNING "pktgen: WARNING: Requested "
1985 "queue_map_min (zero-based) (%d) exceeds valid range "
1986 "[0 - %d] for (%d) queues on %s, resetting\n",
1987 pkt_dev->queue_map_min, (ntxq ?: 1)- 1, ntxq,
1988 pkt_dev->odev->name);
1989 pkt_dev->queue_map_min = ntxq - 1;
1990 }
1991 if (pkt_dev->queue_map_max >= ntxq) {
1992 printk(KERN_WARNING "pktgen: WARNING: Requested "
1993 "queue_map_max (zero-based) (%d) exceeds valid range "
1994 "[0 - %d] for (%d) queues on %s, resetting\n",
1995 pkt_dev->queue_map_max, (ntxq ?: 1)- 1, ntxq,
1996 pkt_dev->odev->name);
1997 pkt_dev->queue_map_max = ntxq - 1;
1998 }
1999
2000 /* Default to the interface's mac if not explicitly set. */
2001
2002 if (is_zero_ether_addr(pkt_dev->src_mac))
2003 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2004
2005 /* Set up Dest MAC */
2006 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2007
2008 /* Set up pkt size */
2009 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2010
2011 if (pkt_dev->flags & F_IPV6) {
2012 /*
2013 * Skip this automatic address setting until locks or functions
2014 * gets exported
2015 */
2016
2017 #ifdef NOTNOW
2018 int i, set = 0, err = 1;
2019 struct inet6_dev *idev;
2020
2021 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2022 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2023 set = 1;
2024 break;
2025 }
2026
2027 if (!set) {
2028
2029 /*
2030 * Use linklevel address if unconfigured.
2031 *
2032 * use ipv6_get_lladdr if/when it's get exported
2033 */
2034
2035 rcu_read_lock();
2036 if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) {
2037 struct inet6_ifaddr *ifp;
2038
2039 read_lock_bh(&idev->lock);
2040 for (ifp = idev->addr_list; ifp;
2041 ifp = ifp->if_next) {
2042 if (ifp->scope == IFA_LINK
2043 && !(ifp->
2044 flags & IFA_F_TENTATIVE)) {
2045 ipv6_addr_copy(&pkt_dev->
2046 cur_in6_saddr,
2047 &ifp->addr);
2048 err = 0;
2049 break;
2050 }
2051 }
2052 read_unlock_bh(&idev->lock);
2053 }
2054 rcu_read_unlock();
2055 if (err)
2056 printk(KERN_ERR "pktgen: ERROR: IPv6 link "
2057 "address not availble.\n");
2058 }
2059 #endif
2060 } else {
2061 pkt_dev->saddr_min = 0;
2062 pkt_dev->saddr_max = 0;
2063 if (strlen(pkt_dev->src_min) == 0) {
2064
2065 struct in_device *in_dev;
2066
2067 rcu_read_lock();
2068 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2069 if (in_dev) {
2070 if (in_dev->ifa_list) {
2071 pkt_dev->saddr_min =
2072 in_dev->ifa_list->ifa_address;
2073 pkt_dev->saddr_max = pkt_dev->saddr_min;
2074 }
2075 }
2076 rcu_read_unlock();
2077 } else {
2078 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2079 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2080 }
2081
2082 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2083 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2084 }
2085 /* Initialize current values. */
2086 pkt_dev->cur_dst_mac_offset = 0;
2087 pkt_dev->cur_src_mac_offset = 0;
2088 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2089 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2090 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2091 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2092 pkt_dev->nflows = 0;
2093 }
2094
2095 static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us)
2096 {
2097 __u64 start;
2098 __u64 now;
2099
2100 start = now = getCurUs();
2101 while (now < spin_until_us) {
2102 /* TODO: optimize sleeping behavior */
2103 if (spin_until_us - now > jiffies_to_usecs(1) + 1)
2104 schedule_timeout_interruptible(1);
2105 else if (spin_until_us - now > 100) {
2106 if (!pkt_dev->running)
2107 return;
2108 if (need_resched())
2109 schedule();
2110 }
2111
2112 now = getCurUs();
2113 }
2114
2115 pkt_dev->idle_acc += now - start;
2116 }
2117
2118 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2119 {
2120 pkt_dev->pkt_overhead = 0;
2121 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2122 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2123 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2124 }
2125
2126 static inline int f_seen(struct pktgen_dev *pkt_dev, int flow)
2127 {
2128
2129 if (pkt_dev->flows[flow].flags & F_INIT)
2130 return 1;
2131 else
2132 return 0;
2133 }
2134
2135 static inline int f_pick(struct pktgen_dev *pkt_dev)
2136 {
2137 int flow = pkt_dev->curfl;
2138
2139 if (pkt_dev->flags & F_FLOW_SEQ) {
2140 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2141 /* reset time */
2142 pkt_dev->flows[flow].count = 0;
2143 pkt_dev->flows[flow].flags = 0;
2144 pkt_dev->curfl += 1;
2145 if (pkt_dev->curfl >= pkt_dev->cflows)
2146 pkt_dev->curfl = 0; /*reset */
2147 }
2148 } else {
2149 flow = random32() % pkt_dev->cflows;
2150 pkt_dev->curfl = flow;
2151
2152 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2153 pkt_dev->flows[flow].count = 0;
2154 pkt_dev->flows[flow].flags = 0;
2155 }
2156 }
2157
2158 return pkt_dev->curfl;
2159 }
2160
2161
2162 #ifdef CONFIG_XFRM
2163 /* If there was already an IPSEC SA, we keep it as is, else
2164 * we go look for it ...
2165 */
2166 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2167 {
2168 struct xfrm_state *x = pkt_dev->flows[flow].x;
2169 if (!x) {
2170 /*slow path: we dont already have xfrm_state*/
2171 x = xfrm_stateonly_find((xfrm_address_t *)&pkt_dev->cur_daddr,
2172 (xfrm_address_t *)&pkt_dev->cur_saddr,
2173 AF_INET,
2174 pkt_dev->ipsmode,
2175 pkt_dev->ipsproto, 0);
2176 if (x) {
2177 pkt_dev->flows[flow].x = x;
2178 set_pkt_overhead(pkt_dev);
2179 pkt_dev->pkt_overhead+=x->props.header_len;
2180 }
2181
2182 }
2183 }
2184 #endif
2185 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2186 {
2187
2188 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2189 pkt_dev->cur_queue_map = smp_processor_id();
2190
2191 else if (pkt_dev->queue_map_min < pkt_dev->queue_map_max) {
2192 __u16 t;
2193 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2194 t = random32() %
2195 (pkt_dev->queue_map_max -
2196 pkt_dev->queue_map_min + 1)
2197 + pkt_dev->queue_map_min;
2198 } else {
2199 t = pkt_dev->cur_queue_map + 1;
2200 if (t > pkt_dev->queue_map_max)
2201 t = pkt_dev->queue_map_min;
2202 }
2203 pkt_dev->cur_queue_map = t;
2204 }
2205 }
2206
2207 /* Increment/randomize headers according to flags and current values
2208 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2209 */
2210 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2211 {
2212 __u32 imn;
2213 __u32 imx;
2214 int flow = 0;
2215
2216 if (pkt_dev->cflows)
2217 flow = f_pick(pkt_dev);
2218
2219 /* Deal with source MAC */
2220 if (pkt_dev->src_mac_count > 1) {
2221 __u32 mc;
2222 __u32 tmp;
2223
2224 if (pkt_dev->flags & F_MACSRC_RND)
2225 mc = random32() % pkt_dev->src_mac_count;
2226 else {
2227 mc = pkt_dev->cur_src_mac_offset++;
2228 if (pkt_dev->cur_src_mac_offset >=
2229 pkt_dev->src_mac_count)
2230 pkt_dev->cur_src_mac_offset = 0;
2231 }
2232
2233 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2234 pkt_dev->hh[11] = tmp;
2235 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2236 pkt_dev->hh[10] = tmp;
2237 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2238 pkt_dev->hh[9] = tmp;
2239 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2240 pkt_dev->hh[8] = tmp;
2241 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2242 pkt_dev->hh[7] = tmp;
2243 }
2244
2245 /* Deal with Destination MAC */
2246 if (pkt_dev->dst_mac_count > 1) {
2247 __u32 mc;
2248 __u32 tmp;
2249
2250 if (pkt_dev->flags & F_MACDST_RND)
2251 mc = random32() % pkt_dev->dst_mac_count;
2252
2253 else {
2254 mc = pkt_dev->cur_dst_mac_offset++;
2255 if (pkt_dev->cur_dst_mac_offset >=
2256 pkt_dev->dst_mac_count) {
2257 pkt_dev->cur_dst_mac_offset = 0;
2258 }
2259 }
2260
2261 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2262 pkt_dev->hh[5] = tmp;
2263 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2264 pkt_dev->hh[4] = tmp;
2265 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2266 pkt_dev->hh[3] = tmp;
2267 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2268 pkt_dev->hh[2] = tmp;
2269 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2270 pkt_dev->hh[1] = tmp;
2271 }
2272
2273 if (pkt_dev->flags & F_MPLS_RND) {
2274 unsigned i;
2275 for (i = 0; i < pkt_dev->nr_labels; i++)
2276 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2277 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2278 ((__force __be32)random32() &
2279 htonl(0x000fffff));
2280 }
2281
2282 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2283 pkt_dev->vlan_id = random32() & (4096-1);
2284 }
2285
2286 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2287 pkt_dev->svlan_id = random32() & (4096 - 1);
2288 }
2289
2290 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2291 if (pkt_dev->flags & F_UDPSRC_RND)
2292 pkt_dev->cur_udp_src = random32() %
2293 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2294 + pkt_dev->udp_src_min;
2295
2296 else {
2297 pkt_dev->cur_udp_src++;
2298 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2299 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2300 }
2301 }
2302
2303 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2304 if (pkt_dev->flags & F_UDPDST_RND) {
2305 pkt_dev->cur_udp_dst = random32() %
2306 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2307 + pkt_dev->udp_dst_min;
2308 } else {
2309 pkt_dev->cur_udp_dst++;
2310 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2311 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2312 }
2313 }
2314
2315 if (!(pkt_dev->flags & F_IPV6)) {
2316
2317 if ((imn = ntohl(pkt_dev->saddr_min)) < (imx =
2318 ntohl(pkt_dev->
2319 saddr_max))) {
2320 __u32 t;
2321 if (pkt_dev->flags & F_IPSRC_RND)
2322 t = random32() % (imx - imn) + imn;
2323 else {
2324 t = ntohl(pkt_dev->cur_saddr);
2325 t++;
2326 if (t > imx) {
2327 t = imn;
2328 }
2329 }
2330 pkt_dev->cur_saddr = htonl(t);
2331 }
2332
2333 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2334 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2335 } else {
2336 imn = ntohl(pkt_dev->daddr_min);
2337 imx = ntohl(pkt_dev->daddr_max);
2338 if (imn < imx) {
2339 __u32 t;
2340 __be32 s;
2341 if (pkt_dev->flags & F_IPDST_RND) {
2342
2343 t = random32() % (imx - imn) + imn;
2344 s = htonl(t);
2345
2346 while (ipv4_is_loopback(s) ||
2347 ipv4_is_multicast(s) ||
2348 ipv4_is_lbcast(s) ||
2349 ipv4_is_zeronet(s) ||
2350 ipv4_is_local_multicast(s)) {
2351 t = random32() % (imx - imn) + imn;
2352 s = htonl(t);
2353 }
2354 pkt_dev->cur_daddr = s;
2355 } else {
2356 t = ntohl(pkt_dev->cur_daddr);
2357 t++;
2358 if (t > imx) {
2359 t = imn;
2360 }
2361 pkt_dev->cur_daddr = htonl(t);
2362 }
2363 }
2364 if (pkt_dev->cflows) {
2365 pkt_dev->flows[flow].flags |= F_INIT;
2366 pkt_dev->flows[flow].cur_daddr =
2367 pkt_dev->cur_daddr;
2368 #ifdef CONFIG_XFRM
2369 if (pkt_dev->flags & F_IPSEC_ON)
2370 get_ipsec_sa(pkt_dev, flow);
2371 #endif
2372 pkt_dev->nflows++;
2373 }
2374 }
2375 } else { /* IPV6 * */
2376
2377 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2378 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2379 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2380 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2381 else {
2382 int i;
2383
2384 /* Only random destinations yet */
2385
2386 for (i = 0; i < 4; i++) {
2387 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2388 (((__force __be32)random32() |
2389 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2390 pkt_dev->max_in6_daddr.s6_addr32[i]);
2391 }
2392 }
2393 }
2394
2395 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2396 __u32 t;
2397 if (pkt_dev->flags & F_TXSIZE_RND) {
2398 t = random32() %
2399 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2400 + pkt_dev->min_pkt_size;
2401 } else {
2402 t = pkt_dev->cur_pkt_size + 1;
2403 if (t > pkt_dev->max_pkt_size)
2404 t = pkt_dev->min_pkt_size;
2405 }
2406 pkt_dev->cur_pkt_size = t;
2407 }
2408
2409 set_cur_queue_map(pkt_dev);
2410
2411 pkt_dev->flows[flow].count++;
2412 }
2413
2414
2415 #ifdef CONFIG_XFRM
2416 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2417 {
2418 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2419 int err = 0;
2420 struct iphdr *iph;
2421
2422 if (!x)
2423 return 0;
2424 /* XXX: we dont support tunnel mode for now until
2425 * we resolve the dst issue */
2426 if (x->props.mode != XFRM_MODE_TRANSPORT)
2427 return 0;
2428
2429 spin_lock(&x->lock);
2430 iph = ip_hdr(skb);
2431
2432 err = x->outer_mode->output(x, skb);
2433 if (err)
2434 goto error;
2435 err = x->type->output(x, skb);
2436 if (err)
2437 goto error;
2438
2439 x->curlft.bytes +=skb->len;
2440 x->curlft.packets++;
2441 error:
2442 spin_unlock(&x->lock);
2443 return err;
2444 }
2445
2446 static inline void free_SAs(struct pktgen_dev *pkt_dev)
2447 {
2448 if (pkt_dev->cflows) {
2449 /* let go of the SAs if we have them */
2450 int i = 0;
2451 for (; i < pkt_dev->nflows; i++){
2452 struct xfrm_state *x = pkt_dev->flows[i].x;
2453 if (x) {
2454 xfrm_state_put(x);
2455 pkt_dev->flows[i].x = NULL;
2456 }
2457 }
2458 }
2459 }
2460
2461 static inline int process_ipsec(struct pktgen_dev *pkt_dev,
2462 struct sk_buff *skb, __be16 protocol)
2463 {
2464 if (pkt_dev->flags & F_IPSEC_ON) {
2465 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2466 int nhead = 0;
2467 if (x) {
2468 int ret;
2469 __u8 *eth;
2470 nhead = x->props.header_len - skb_headroom(skb);
2471 if (nhead >0) {
2472 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2473 if (ret < 0) {
2474 printk(KERN_ERR "Error expanding "
2475 "ipsec packet %d\n",ret);
2476 goto err;
2477 }
2478 }
2479
2480 /* ipsec is not expecting ll header */
2481 skb_pull(skb, ETH_HLEN);
2482 ret = pktgen_output_ipsec(skb, pkt_dev);
2483 if (ret) {
2484 printk(KERN_ERR "Error creating ipsec "
2485 "packet %d\n",ret);
2486 goto err;
2487 }
2488 /* restore ll */
2489 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2490 memcpy(eth, pkt_dev->hh, 12);
2491 *(u16 *) & eth[12] = protocol;
2492 }
2493 }
2494 return 1;
2495 err:
2496 kfree_skb(skb);
2497 return 0;
2498 }
2499 #endif
2500
2501 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2502 {
2503 unsigned i;
2504 for (i = 0; i < pkt_dev->nr_labels; i++) {
2505 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2506 }
2507 mpls--;
2508 *mpls |= MPLS_STACK_BOTTOM;
2509 }
2510
2511 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2512 unsigned int prio)
2513 {
2514 return htons(id | (cfi << 12) | (prio << 13));
2515 }
2516
2517 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2518 struct pktgen_dev *pkt_dev)
2519 {
2520 struct sk_buff *skb = NULL;
2521 __u8 *eth;
2522 struct udphdr *udph;
2523 int datalen, iplen;
2524 struct iphdr *iph;
2525 struct pktgen_hdr *pgh = NULL;
2526 __be16 protocol = htons(ETH_P_IP);
2527 __be32 *mpls;
2528 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2529 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2530 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2531 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2532 u16 queue_map;
2533
2534 if (pkt_dev->nr_labels)
2535 protocol = htons(ETH_P_MPLS_UC);
2536
2537 if (pkt_dev->vlan_id != 0xffff)
2538 protocol = htons(ETH_P_8021Q);
2539
2540 /* Update any of the values, used when we're incrementing various
2541 * fields.
2542 */
2543 queue_map = pkt_dev->cur_queue_map;
2544 mod_cur_headers(pkt_dev);
2545
2546 datalen = (odev->hard_header_len + 16) & ~0xf;
2547 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + datalen +
2548 pkt_dev->pkt_overhead, GFP_ATOMIC);
2549 if (!skb) {
2550 sprintf(pkt_dev->result, "No memory");
2551 return NULL;
2552 }
2553
2554 skb_reserve(skb, datalen);
2555
2556 /* Reserve for ethernet and IP header */
2557 eth = (__u8 *) skb_push(skb, 14);
2558 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2559 if (pkt_dev->nr_labels)
2560 mpls_push(mpls, pkt_dev);
2561
2562 if (pkt_dev->vlan_id != 0xffff) {
2563 if (pkt_dev->svlan_id != 0xffff) {
2564 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2565 *svlan_tci = build_tci(pkt_dev->svlan_id,
2566 pkt_dev->svlan_cfi,
2567 pkt_dev->svlan_p);
2568 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2569 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2570 }
2571 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2572 *vlan_tci = build_tci(pkt_dev->vlan_id,
2573 pkt_dev->vlan_cfi,
2574 pkt_dev->vlan_p);
2575 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2576 *vlan_encapsulated_proto = htons(ETH_P_IP);
2577 }
2578
2579 skb->network_header = skb->tail;
2580 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2581 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2582 skb_set_queue_mapping(skb, queue_map);
2583 iph = ip_hdr(skb);
2584 udph = udp_hdr(skb);
2585
2586 memcpy(eth, pkt_dev->hh, 12);
2587 *(__be16 *) & eth[12] = protocol;
2588
2589 /* Eth + IPh + UDPh + mpls */
2590 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2591 pkt_dev->pkt_overhead;
2592 if (datalen < sizeof(struct pktgen_hdr))
2593 datalen = sizeof(struct pktgen_hdr);
2594
2595 udph->source = htons(pkt_dev->cur_udp_src);
2596 udph->dest = htons(pkt_dev->cur_udp_dst);
2597 udph->len = htons(datalen + 8); /* DATA + udphdr */
2598 udph->check = 0; /* No checksum */
2599
2600 iph->ihl = 5;
2601 iph->version = 4;
2602 iph->ttl = 32;
2603 iph->tos = pkt_dev->tos;
2604 iph->protocol = IPPROTO_UDP; /* UDP */
2605 iph->saddr = pkt_dev->cur_saddr;
2606 iph->daddr = pkt_dev->cur_daddr;
2607 iph->frag_off = 0;
2608 iplen = 20 + 8 + datalen;
2609 iph->tot_len = htons(iplen);
2610 iph->check = 0;
2611 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2612 skb->protocol = protocol;
2613 skb->mac_header = (skb->network_header - ETH_HLEN -
2614 pkt_dev->pkt_overhead);
2615 skb->dev = odev;
2616 skb->pkt_type = PACKET_HOST;
2617
2618 if (pkt_dev->nfrags <= 0)
2619 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2620 else {
2621 int frags = pkt_dev->nfrags;
2622 int i;
2623
2624 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2625
2626 if (frags > MAX_SKB_FRAGS)
2627 frags = MAX_SKB_FRAGS;
2628 if (datalen > frags * PAGE_SIZE) {
2629 skb_put(skb, datalen - frags * PAGE_SIZE);
2630 datalen = frags * PAGE_SIZE;
2631 }
2632
2633 i = 0;
2634 while (datalen > 0) {
2635 struct page *page = alloc_pages(GFP_KERNEL, 0);
2636 skb_shinfo(skb)->frags[i].page = page;
2637 skb_shinfo(skb)->frags[i].page_offset = 0;
2638 skb_shinfo(skb)->frags[i].size =
2639 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2640 datalen -= skb_shinfo(skb)->frags[i].size;
2641 skb->len += skb_shinfo(skb)->frags[i].size;
2642 skb->data_len += skb_shinfo(skb)->frags[i].size;
2643 i++;
2644 skb_shinfo(skb)->nr_frags = i;
2645 }
2646
2647 while (i < frags) {
2648 int rem;
2649
2650 if (i == 0)
2651 break;
2652
2653 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2654 if (rem == 0)
2655 break;
2656
2657 skb_shinfo(skb)->frags[i - 1].size -= rem;
2658
2659 skb_shinfo(skb)->frags[i] =
2660 skb_shinfo(skb)->frags[i - 1];
2661 get_page(skb_shinfo(skb)->frags[i].page);
2662 skb_shinfo(skb)->frags[i].page =
2663 skb_shinfo(skb)->frags[i - 1].page;
2664 skb_shinfo(skb)->frags[i].page_offset +=
2665 skb_shinfo(skb)->frags[i - 1].size;
2666 skb_shinfo(skb)->frags[i].size = rem;
2667 i++;
2668 skb_shinfo(skb)->nr_frags = i;
2669 }
2670 }
2671
2672 /* Stamp the time, and sequence number, convert them to network byte order */
2673
2674 if (pgh) {
2675 struct timeval timestamp;
2676
2677 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2678 pgh->seq_num = htonl(pkt_dev->seq_num);
2679
2680 do_gettimeofday(&timestamp);
2681 pgh->tv_sec = htonl(timestamp.tv_sec);
2682 pgh->tv_usec = htonl(timestamp.tv_usec);
2683 }
2684
2685 #ifdef CONFIG_XFRM
2686 if (!process_ipsec(pkt_dev, skb, protocol))
2687 return NULL;
2688 #endif
2689
2690 return skb;
2691 }
2692
2693 /*
2694 * scan_ip6, fmt_ip taken from dietlibc-0.21
2695 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2696 *
2697 * Slightly modified for kernel.
2698 * Should be candidate for net/ipv4/utils.c
2699 * --ro
2700 */
2701
2702 static unsigned int scan_ip6(const char *s, char ip[16])
2703 {
2704 unsigned int i;
2705 unsigned int len = 0;
2706 unsigned long u;
2707 char suffix[16];
2708 unsigned int prefixlen = 0;
2709 unsigned int suffixlen = 0;
2710 __be32 tmp;
2711 char *pos;
2712
2713 for (i = 0; i < 16; i++)
2714 ip[i] = 0;
2715
2716 for (;;) {
2717 if (*s == ':') {
2718 len++;
2719 if (s[1] == ':') { /* Found "::", skip to part 2 */
2720 s += 2;
2721 len++;
2722 break;
2723 }
2724 s++;
2725 }
2726
2727 u = simple_strtoul(s, &pos, 16);
2728 i = pos - s;
2729 if (!i)
2730 return 0;
2731 if (prefixlen == 12 && s[i] == '.') {
2732
2733 /* the last 4 bytes may be written as IPv4 address */
2734
2735 tmp = in_aton(s);
2736 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2737 return i + len;
2738 }
2739 ip[prefixlen++] = (u >> 8);
2740 ip[prefixlen++] = (u & 255);
2741 s += i;
2742 len += i;
2743 if (prefixlen == 16)
2744 return len;
2745 }
2746
2747 /* part 2, after "::" */
2748 for (;;) {
2749 if (*s == ':') {
2750 if (suffixlen == 0)
2751 break;
2752 s++;
2753 len++;
2754 } else if (suffixlen != 0)
2755 break;
2756
2757 u = simple_strtol(s, &pos, 16);
2758 i = pos - s;
2759 if (!i) {
2760 if (*s)
2761 len--;
2762 break;
2763 }
2764 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2765 tmp = in_aton(s);
2766 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2767 sizeof(tmp));
2768 suffixlen += 4;
2769 len += strlen(s);
2770 break;
2771 }
2772 suffix[suffixlen++] = (u >> 8);
2773 suffix[suffixlen++] = (u & 255);
2774 s += i;
2775 len += i;
2776 if (prefixlen + suffixlen == 16)
2777 break;
2778 }
2779 for (i = 0; i < suffixlen; i++)
2780 ip[16 - suffixlen + i] = suffix[i];
2781 return len;
2782 }
2783
2784 static char tohex(char hexdigit)
2785 {
2786 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2787 }
2788
2789 static int fmt_xlong(char *s, unsigned int i)
2790 {
2791 char *bak = s;
2792 *s = tohex((i >> 12) & 0xf);
2793 if (s != bak || *s != '0')
2794 ++s;
2795 *s = tohex((i >> 8) & 0xf);
2796 if (s != bak || *s != '0')
2797 ++s;
2798 *s = tohex((i >> 4) & 0xf);
2799 if (s != bak || *s != '0')
2800 ++s;
2801 *s = tohex(i & 0xf);
2802 return s - bak + 1;
2803 }
2804
2805 static unsigned int fmt_ip6(char *s, const char ip[16])
2806 {
2807 unsigned int len;
2808 unsigned int i;
2809 unsigned int temp;
2810 unsigned int compressing;
2811 int j;
2812
2813 len = 0;
2814 compressing = 0;
2815 for (j = 0; j < 16; j += 2) {
2816
2817 #ifdef V4MAPPEDPREFIX
2818 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2819 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2820 temp = strlen(s);
2821 return len + temp;
2822 }
2823 #endif
2824 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2825 (unsigned long)(unsigned char)ip[j + 1];
2826 if (temp == 0) {
2827 if (!compressing) {
2828 compressing = 1;
2829 if (j == 0) {
2830 *s++ = ':';
2831 ++len;
2832 }
2833 }
2834 } else {
2835 if (compressing) {
2836 compressing = 0;
2837 *s++ = ':';
2838 ++len;
2839 }
2840 i = fmt_xlong(s, temp);
2841 len += i;
2842 s += i;
2843 if (j < 14) {
2844 *s++ = ':';
2845 ++len;
2846 }
2847 }
2848 }
2849 if (compressing) {
2850 *s++ = ':';
2851 ++len;
2852 }
2853 *s = 0;
2854 return len;
2855 }
2856
2857 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2858 struct pktgen_dev *pkt_dev)
2859 {
2860 struct sk_buff *skb = NULL;
2861 __u8 *eth;
2862 struct udphdr *udph;
2863 int datalen;
2864 struct ipv6hdr *iph;
2865 struct pktgen_hdr *pgh = NULL;
2866 __be16 protocol = htons(ETH_P_IPV6);
2867 __be32 *mpls;
2868 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2869 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2870 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2871 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2872 u16 queue_map;
2873
2874 if (pkt_dev->nr_labels)
2875 protocol = htons(ETH_P_MPLS_UC);
2876
2877 if (pkt_dev->vlan_id != 0xffff)
2878 protocol = htons(ETH_P_8021Q);
2879
2880 /* Update any of the values, used when we're incrementing various
2881 * fields.
2882 */
2883 queue_map = pkt_dev->cur_queue_map;
2884 mod_cur_headers(pkt_dev);
2885
2886 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16 +
2887 pkt_dev->pkt_overhead, GFP_ATOMIC);
2888 if (!skb) {
2889 sprintf(pkt_dev->result, "No memory");
2890 return NULL;
2891 }
2892
2893 skb_reserve(skb, 16);
2894
2895 /* Reserve for ethernet and IP header */
2896 eth = (__u8 *) skb_push(skb, 14);
2897 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2898 if (pkt_dev->nr_labels)
2899 mpls_push(mpls, pkt_dev);
2900
2901 if (pkt_dev->vlan_id != 0xffff) {
2902 if (pkt_dev->svlan_id != 0xffff) {
2903 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2904 *svlan_tci = build_tci(pkt_dev->svlan_id,
2905 pkt_dev->svlan_cfi,
2906 pkt_dev->svlan_p);
2907 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2908 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2909 }
2910 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2911 *vlan_tci = build_tci(pkt_dev->vlan_id,
2912 pkt_dev->vlan_cfi,
2913 pkt_dev->vlan_p);
2914 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2915 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2916 }
2917
2918 skb->network_header = skb->tail;
2919 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2920 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2921 skb_set_queue_mapping(skb, queue_map);
2922 iph = ipv6_hdr(skb);
2923 udph = udp_hdr(skb);
2924
2925 memcpy(eth, pkt_dev->hh, 12);
2926 *(__be16 *) & eth[12] = protocol;
2927
2928 /* Eth + IPh + UDPh + mpls */
2929 datalen = pkt_dev->cur_pkt_size - 14 -
2930 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2931 pkt_dev->pkt_overhead;
2932
2933 if (datalen < sizeof(struct pktgen_hdr)) {
2934 datalen = sizeof(struct pktgen_hdr);
2935 if (net_ratelimit())
2936 printk(KERN_INFO "pktgen: increased datalen to %d\n",
2937 datalen);
2938 }
2939
2940 udph->source = htons(pkt_dev->cur_udp_src);
2941 udph->dest = htons(pkt_dev->cur_udp_dst);
2942 udph->len = htons(datalen + sizeof(struct udphdr));
2943 udph->check = 0; /* No checksum */
2944
2945 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2946
2947 if (pkt_dev->traffic_class) {
2948 /* Version + traffic class + flow (0) */
2949 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2950 }
2951
2952 iph->hop_limit = 32;
2953
2954 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2955 iph->nexthdr = IPPROTO_UDP;
2956
2957 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2958 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2959
2960 skb->mac_header = (skb->network_header - ETH_HLEN -
2961 pkt_dev->pkt_overhead);
2962 skb->protocol = protocol;
2963 skb->dev = odev;
2964 skb->pkt_type = PACKET_HOST;
2965
2966 if (pkt_dev->nfrags <= 0)
2967 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2968 else {
2969 int frags = pkt_dev->nfrags;
2970 int i;
2971
2972 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2973
2974 if (frags > MAX_SKB_FRAGS)
2975 frags = MAX_SKB_FRAGS;
2976 if (datalen > frags * PAGE_SIZE) {
2977 skb_put(skb, datalen - frags * PAGE_SIZE);
2978 datalen = frags * PAGE_SIZE;
2979 }
2980
2981 i = 0;
2982 while (datalen > 0) {
2983 struct page *page = alloc_pages(GFP_KERNEL, 0);
2984 skb_shinfo(skb)->frags[i].page = page;
2985 skb_shinfo(skb)->frags[i].page_offset = 0;
2986 skb_shinfo(skb)->frags[i].size =
2987 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2988 datalen -= skb_shinfo(skb)->frags[i].size;
2989 skb->len += skb_shinfo(skb)->frags[i].size;
2990 skb->data_len += skb_shinfo(skb)->frags[i].size;
2991 i++;
2992 skb_shinfo(skb)->nr_frags = i;
2993 }
2994
2995 while (i < frags) {
2996 int rem;
2997
2998 if (i == 0)
2999 break;
3000
3001 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
3002 if (rem == 0)
3003 break;
3004
3005 skb_shinfo(skb)->frags[i - 1].size -= rem;
3006
3007 skb_shinfo(skb)->frags[i] =
3008 skb_shinfo(skb)->frags[i - 1];
3009 get_page(skb_shinfo(skb)->frags[i].page);
3010 skb_shinfo(skb)->frags[i].page =
3011 skb_shinfo(skb)->frags[i - 1].page;
3012 skb_shinfo(skb)->frags[i].page_offset +=
3013 skb_shinfo(skb)->frags[i - 1].size;
3014 skb_shinfo(skb)->frags[i].size = rem;
3015 i++;
3016 skb_shinfo(skb)->nr_frags = i;
3017 }
3018 }
3019
3020 /* Stamp the time, and sequence number, convert them to network byte order */
3021 /* should we update cloned packets too ? */
3022 if (pgh) {
3023 struct timeval timestamp;
3024
3025 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
3026 pgh->seq_num = htonl(pkt_dev->seq_num);
3027
3028 do_gettimeofday(&timestamp);
3029 pgh->tv_sec = htonl(timestamp.tv_sec);
3030 pgh->tv_usec = htonl(timestamp.tv_usec);
3031 }
3032 /* pkt_dev->seq_num++; FF: you really mean this? */
3033
3034 return skb;
3035 }
3036
3037 static inline struct sk_buff *fill_packet(struct net_device *odev,
3038 struct pktgen_dev *pkt_dev)
3039 {
3040 if (pkt_dev->flags & F_IPV6)
3041 return fill_packet_ipv6(odev, pkt_dev);
3042 else
3043 return fill_packet_ipv4(odev, pkt_dev);
3044 }
3045
3046 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3047 {
3048 pkt_dev->seq_num = 1;
3049 pkt_dev->idle_acc = 0;
3050 pkt_dev->sofar = 0;
3051 pkt_dev->tx_bytes = 0;
3052 pkt_dev->errors = 0;
3053 }
3054
3055 /* Set up structure for sending pkts, clear counters */
3056
3057 static void pktgen_run(struct pktgen_thread *t)
3058 {
3059 struct pktgen_dev *pkt_dev;
3060 int started = 0;
3061
3062 pr_debug("pktgen: entering pktgen_run. %p\n", t);
3063
3064 if_lock(t);
3065 list_for_each_entry(pkt_dev, &t->if_list, list) {
3066
3067 /*
3068 * setup odev and create initial packet.
3069 */
3070 pktgen_setup_inject(pkt_dev);
3071
3072 if (pkt_dev->odev) {
3073 pktgen_clear_counters(pkt_dev);
3074 pkt_dev->running = 1; /* Cranke yeself! */
3075 pkt_dev->skb = NULL;
3076 pkt_dev->started_at = getCurUs();
3077 pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */
3078 pkt_dev->next_tx_ns = 0;
3079 set_pkt_overhead(pkt_dev);
3080
3081 strcpy(pkt_dev->result, "Starting");
3082 started++;
3083 } else
3084 strcpy(pkt_dev->result, "Error starting");
3085 }
3086 if_unlock(t);
3087 if (started)
3088 t->control &= ~(T_STOP);
3089 }
3090
3091 static void pktgen_stop_all_threads_ifs(void)
3092 {
3093 struct pktgen_thread *t;
3094
3095 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n");
3096
3097 mutex_lock(&pktgen_thread_lock);
3098
3099 list_for_each_entry(t, &pktgen_threads, th_list)
3100 t->control |= T_STOP;
3101
3102 mutex_unlock(&pktgen_thread_lock);
3103 }
3104
3105 static int thread_is_running(struct pktgen_thread *t)
3106 {
3107 struct pktgen_dev *pkt_dev;
3108 int res = 0;
3109
3110 list_for_each_entry(pkt_dev, &t->if_list, list)
3111 if (pkt_dev->running) {
3112 res = 1;
3113 break;
3114 }
3115 return res;
3116 }
3117
3118 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3119 {
3120 if_lock(t);
3121
3122 while (thread_is_running(t)) {
3123
3124 if_unlock(t);
3125
3126 msleep_interruptible(100);
3127
3128 if (signal_pending(current))
3129 goto signal;
3130 if_lock(t);
3131 }
3132 if_unlock(t);
3133 return 1;
3134 signal:
3135 return 0;
3136 }
3137
3138 static int pktgen_wait_all_threads_run(void)
3139 {
3140 struct pktgen_thread *t;
3141 int sig = 1;
3142
3143 mutex_lock(&pktgen_thread_lock);
3144
3145 list_for_each_entry(t, &pktgen_threads, th_list) {
3146 sig = pktgen_wait_thread_run(t);
3147 if (sig == 0)
3148 break;
3149 }
3150
3151 if (sig == 0)
3152 list_for_each_entry(t, &pktgen_threads, th_list)
3153 t->control |= (T_STOP);
3154
3155 mutex_unlock(&pktgen_thread_lock);
3156 return sig;
3157 }
3158
3159 static void pktgen_run_all_threads(void)
3160 {
3161 struct pktgen_thread *t;
3162
3163 pr_debug("pktgen: entering pktgen_run_all_threads.\n");
3164
3165 mutex_lock(&pktgen_thread_lock);
3166
3167 list_for_each_entry(t, &pktgen_threads, th_list)
3168 t->control |= (T_RUN);
3169
3170 mutex_unlock(&pktgen_thread_lock);
3171
3172 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
3173
3174 pktgen_wait_all_threads_run();
3175 }
3176
3177 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3178 {
3179 __u64 total_us, bps, mbps, pps, idle;
3180 char *p = pkt_dev->result;
3181
3182 total_us = pkt_dev->stopped_at - pkt_dev->started_at;
3183
3184 idle = pkt_dev->idle_acc;
3185
3186 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3187 (unsigned long long)total_us,
3188 (unsigned long long)(total_us - idle),
3189 (unsigned long long)idle,
3190 (unsigned long long)pkt_dev->sofar,
3191 pkt_dev->cur_pkt_size, nr_frags);
3192
3193 pps = pkt_dev->sofar * USEC_PER_SEC;
3194
3195 while ((total_us >> 32) != 0) {
3196 pps >>= 1;
3197 total_us >>= 1;
3198 }
3199
3200 do_div(pps, total_us);
3201
3202 bps = pps * 8 * pkt_dev->cur_pkt_size;
3203
3204 mbps = bps;
3205 do_div(mbps, 1000000);
3206 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3207 (unsigned long long)pps,
3208 (unsigned long long)mbps,
3209 (unsigned long long)bps,
3210 (unsigned long long)pkt_dev->errors);
3211 }
3212
3213 /* Set stopped-at timer, remove from running list, do counters & statistics */
3214
3215 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3216 {
3217 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3218
3219 if (!pkt_dev->running) {
3220 printk(KERN_WARNING "pktgen: interface: %s is already "
3221 "stopped\n", pkt_dev->odev->name);
3222 return -EINVAL;
3223 }
3224
3225 pkt_dev->stopped_at = getCurUs();
3226 pkt_dev->running = 0;
3227
3228 show_results(pkt_dev, nr_frags);
3229
3230 return 0;
3231 }
3232
3233 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3234 {
3235 struct pktgen_dev *pkt_dev, *best = NULL;
3236
3237 if_lock(t);
3238
3239 list_for_each_entry(pkt_dev, &t->if_list, list) {
3240 if (!pkt_dev->running)
3241 continue;
3242 if (best == NULL)
3243 best = pkt_dev;
3244 else if (pkt_dev->next_tx_us < best->next_tx_us)
3245 best = pkt_dev;
3246 }
3247 if_unlock(t);
3248 return best;
3249 }
3250
3251 static void pktgen_stop(struct pktgen_thread *t)
3252 {
3253 struct pktgen_dev *pkt_dev;
3254
3255 pr_debug("pktgen: entering pktgen_stop\n");
3256
3257 if_lock(t);
3258
3259 list_for_each_entry(pkt_dev, &t->if_list, list) {
3260 pktgen_stop_device(pkt_dev);
3261 if (pkt_dev->skb)
3262 kfree_skb(pkt_dev->skb);
3263
3264 pkt_dev->skb = NULL;
3265 }
3266
3267 if_unlock(t);
3268 }
3269
3270 /*
3271 * one of our devices needs to be removed - find it
3272 * and remove it
3273 */
3274 static void pktgen_rem_one_if(struct pktgen_thread *t)
3275 {
3276 struct list_head *q, *n;
3277 struct pktgen_dev *cur;
3278
3279 pr_debug("pktgen: entering pktgen_rem_one_if\n");
3280
3281 if_lock(t);
3282
3283 list_for_each_safe(q, n, &t->if_list) {
3284 cur = list_entry(q, struct pktgen_dev, list);
3285
3286 if (!cur->removal_mark)
3287 continue;
3288
3289 if (cur->skb)
3290 kfree_skb(cur->skb);
3291 cur->skb = NULL;
3292
3293 pktgen_remove_device(t, cur);
3294
3295 break;
3296 }
3297
3298 if_unlock(t);
3299 }
3300
3301 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3302 {
3303 struct list_head *q, *n;
3304 struct pktgen_dev *cur;
3305
3306 /* Remove all devices, free mem */
3307
3308 pr_debug("pktgen: entering pktgen_rem_all_ifs\n");
3309 if_lock(t);
3310
3311 list_for_each_safe(q, n, &t->if_list) {
3312 cur = list_entry(q, struct pktgen_dev, list);
3313
3314 if (cur->skb)
3315 kfree_skb(cur->skb);
3316 cur->skb = NULL;
3317
3318 pktgen_remove_device(t, cur);
3319 }
3320
3321 if_unlock(t);
3322 }
3323
3324 static void pktgen_rem_thread(struct pktgen_thread *t)
3325 {
3326 /* Remove from the thread list */
3327
3328 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3329
3330 mutex_lock(&pktgen_thread_lock);
3331
3332 list_del(&t->th_list);
3333
3334 mutex_unlock(&pktgen_thread_lock);
3335 }
3336
3337 static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
3338 {
3339 struct net_device *odev = NULL;
3340 struct netdev_queue *txq;
3341 __u64 idle_start = 0;
3342 u16 queue_map;
3343 int ret;
3344
3345 odev = pkt_dev->odev;
3346
3347 if (pkt_dev->delay_us || pkt_dev->delay_ns) {
3348 u64 now;
3349
3350 now = getCurUs();
3351 if (now < pkt_dev->next_tx_us)
3352 spin(pkt_dev, pkt_dev->next_tx_us);
3353
3354 /* This is max DELAY, this has special meaning of
3355 * "never transmit"
3356 */
3357 if (pkt_dev->delay_us == 0x7FFFFFFF) {
3358 pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us;
3359 pkt_dev->next_tx_ns = pkt_dev->delay_ns;
3360 goto out;
3361 }
3362 }
3363
3364 if (!pkt_dev->skb) {
3365 set_cur_queue_map(pkt_dev);
3366 queue_map = pkt_dev->cur_queue_map;
3367 } else {
3368 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3369 }
3370
3371 txq = netdev_get_tx_queue(odev, queue_map);
3372 if (netif_tx_queue_stopped(txq) ||
3373 netif_tx_queue_frozen(txq) ||
3374 need_resched()) {
3375 idle_start = getCurUs();
3376
3377 if (!netif_running(odev)) {
3378 pktgen_stop_device(pkt_dev);
3379 if (pkt_dev->skb)
3380 kfree_skb(pkt_dev->skb);
3381 pkt_dev->skb = NULL;
3382 goto out;
3383 }
3384 if (need_resched())
3385 schedule();
3386
3387 pkt_dev->idle_acc += getCurUs() - idle_start;
3388
3389 if (netif_tx_queue_stopped(txq) ||
3390 netif_tx_queue_frozen(txq)) {
3391 pkt_dev->next_tx_us = getCurUs(); /* TODO */
3392 pkt_dev->next_tx_ns = 0;
3393 goto out; /* Try the next interface */
3394 }
3395 }
3396
3397 if (pkt_dev->last_ok || !pkt_dev->skb) {
3398 if ((++pkt_dev->clone_count >= pkt_dev->clone_skb)
3399 || (!pkt_dev->skb)) {
3400 /* build a new pkt */
3401 if (pkt_dev->skb)
3402 kfree_skb(pkt_dev->skb);
3403
3404 pkt_dev->skb = fill_packet(odev, pkt_dev);
3405 if (pkt_dev->skb == NULL) {
3406 printk(KERN_ERR "pktgen: ERROR: couldn't "
3407 "allocate skb in fill_packet.\n");
3408 schedule();
3409 pkt_dev->clone_count--; /* back out increment, OOM */
3410 goto out;
3411 }
3412 pkt_dev->allocated_skbs++;
3413 pkt_dev->clone_count = 0; /* reset counter */
3414 }
3415 }
3416
3417 /* fill_packet() might have changed the queue */
3418 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3419 txq = netdev_get_tx_queue(odev, queue_map);
3420
3421 __netif_tx_lock_bh(txq);
3422 if (!netif_tx_queue_stopped(txq) &&
3423 !netif_tx_queue_frozen(txq)) {
3424
3425 atomic_inc(&(pkt_dev->skb->users));
3426 retry_now:
3427 ret = odev->hard_start_xmit(pkt_dev->skb, odev);
3428 if (likely(ret == NETDEV_TX_OK)) {
3429 pkt_dev->last_ok = 1;
3430 pkt_dev->sofar++;
3431 pkt_dev->seq_num++;
3432 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size;
3433
3434 } else if (ret == NETDEV_TX_LOCKED
3435 && (odev->features & NETIF_F_LLTX)) {
3436 cpu_relax();
3437 goto retry_now;
3438 } else { /* Retry it next time */
3439
3440 atomic_dec(&(pkt_dev->skb->users));
3441
3442 if (debug && net_ratelimit())
3443 printk(KERN_INFO "pktgen: Hard xmit error\n");
3444
3445 pkt_dev->errors++;
3446 pkt_dev->last_ok = 0;
3447 }
3448
3449 pkt_dev->next_tx_us = getCurUs();
3450 pkt_dev->next_tx_ns = 0;
3451
3452 pkt_dev->next_tx_us += pkt_dev->delay_us;
3453 pkt_dev->next_tx_ns += pkt_dev->delay_ns;
3454
3455 if (pkt_dev->next_tx_ns > 1000) {
3456 pkt_dev->next_tx_us++;
3457 pkt_dev->next_tx_ns -= 1000;
3458 }
3459 }
3460
3461 else { /* Retry it next time */
3462 pkt_dev->last_ok = 0;
3463 pkt_dev->next_tx_us = getCurUs(); /* TODO */
3464 pkt_dev->next_tx_ns = 0;
3465 }
3466
3467 __netif_tx_unlock_bh(txq);
3468
3469 /* If pkt_dev->count is zero, then run forever */
3470 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3471 if (atomic_read(&(pkt_dev->skb->users)) != 1) {
3472 idle_start = getCurUs();
3473 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3474 if (signal_pending(current)) {
3475 break;
3476 }
3477 schedule();
3478 }
3479 pkt_dev->idle_acc += getCurUs() - idle_start;
3480 }
3481
3482 /* Done with this */
3483 pktgen_stop_device(pkt_dev);
3484 if (pkt_dev->skb)
3485 kfree_skb(pkt_dev->skb);
3486 pkt_dev->skb = NULL;
3487 }
3488 out:;
3489 }
3490
3491 /*
3492 * Main loop of the thread goes here
3493 */
3494
3495 static int pktgen_thread_worker(void *arg)
3496 {
3497 DEFINE_WAIT(wait);
3498 struct pktgen_thread *t = arg;
3499 struct pktgen_dev *pkt_dev = NULL;
3500 int cpu = t->cpu;
3501
3502 BUG_ON(smp_processor_id() != cpu);
3503
3504 init_waitqueue_head(&t->queue);
3505 complete(&t->start_done);
3506
3507 pr_debug("pktgen: starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3508
3509 set_current_state(TASK_INTERRUPTIBLE);
3510
3511 set_freezable();
3512
3513 while (!kthread_should_stop()) {
3514 pkt_dev = next_to_run(t);
3515
3516 if (!pkt_dev &&
3517 (t->control & (T_STOP | T_RUN | T_REMDEVALL | T_REMDEV))
3518 == 0) {
3519 prepare_to_wait(&(t->queue), &wait,
3520 TASK_INTERRUPTIBLE);
3521 schedule_timeout(HZ / 10);
3522 finish_wait(&(t->queue), &wait);
3523 }
3524
3525 __set_current_state(TASK_RUNNING);
3526
3527 if (pkt_dev)
3528 pktgen_xmit(pkt_dev);
3529
3530 if (t->control & T_STOP) {
3531 pktgen_stop(t);
3532 t->control &= ~(T_STOP);
3533 }
3534
3535 if (t->control & T_RUN) {
3536 pktgen_run(t);
3537 t->control &= ~(T_RUN);
3538 }
3539
3540 if (t->control & T_REMDEVALL) {
3541 pktgen_rem_all_ifs(t);
3542 t->control &= ~(T_REMDEVALL);
3543 }
3544
3545 if (t->control & T_REMDEV) {
3546 pktgen_rem_one_if(t);
3547 t->control &= ~(T_REMDEV);
3548 }
3549
3550 try_to_freeze();
3551
3552 set_current_state(TASK_INTERRUPTIBLE);
3553 }
3554
3555 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm);
3556 pktgen_stop(t);
3557
3558 pr_debug("pktgen: %s removing all device\n", t->tsk->comm);
3559 pktgen_rem_all_ifs(t);
3560
3561 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm);
3562 pktgen_rem_thread(t);
3563
3564 return 0;
3565 }
3566
3567 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3568 const char *ifname)
3569 {
3570 struct pktgen_dev *p, *pkt_dev = NULL;
3571 if_lock(t);
3572
3573 list_for_each_entry(p, &t->if_list, list)
3574 if (strncmp(p->odev->name, ifname, IFNAMSIZ) == 0) {
3575 pkt_dev = p;
3576 break;
3577 }
3578
3579 if_unlock(t);
3580 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev);
3581 return pkt_dev;
3582 }
3583
3584 /*
3585 * Adds a dev at front of if_list.
3586 */
3587
3588 static int add_dev_to_thread(struct pktgen_thread *t,
3589 struct pktgen_dev *pkt_dev)
3590 {
3591 int rv = 0;
3592
3593 if_lock(t);
3594
3595 if (pkt_dev->pg_thread) {
3596 printk(KERN_ERR "pktgen: ERROR: already assigned "
3597 "to a thread.\n");
3598 rv = -EBUSY;
3599 goto out;
3600 }
3601
3602 list_add(&pkt_dev->list, &t->if_list);
3603 pkt_dev->pg_thread = t;
3604 pkt_dev->running = 0;
3605
3606 out:
3607 if_unlock(t);
3608 return rv;
3609 }
3610
3611 /* Called under thread lock */
3612
3613 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3614 {
3615 struct pktgen_dev *pkt_dev;
3616 int err;
3617
3618 /* We don't allow a device to be on several threads */
3619
3620 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3621 if (pkt_dev) {
3622 printk(KERN_ERR "pktgen: ERROR: interface already used.\n");
3623 return -EBUSY;
3624 }
3625
3626 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
3627 if (!pkt_dev)
3628 return -ENOMEM;
3629
3630 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state));
3631 if (pkt_dev->flows == NULL) {
3632 kfree(pkt_dev);
3633 return -ENOMEM;
3634 }
3635 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3636
3637 pkt_dev->removal_mark = 0;
3638 pkt_dev->min_pkt_size = ETH_ZLEN;
3639 pkt_dev->max_pkt_size = ETH_ZLEN;
3640 pkt_dev->nfrags = 0;
3641 pkt_dev->clone_skb = pg_clone_skb_d;
3642 pkt_dev->delay_us = pg_delay_d / 1000;
3643 pkt_dev->delay_ns = pg_delay_d % 1000;
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 if (pkt_dev->flows)
3683 vfree(pkt_dev->flows);
3684 kfree(pkt_dev);
3685 return err;
3686 }
3687
3688 static int __init pktgen_create_thread(int cpu)
3689 {
3690 struct pktgen_thread *t;
3691 struct proc_dir_entry *pe;
3692 struct task_struct *p;
3693
3694 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL);
3695 if (!t) {
3696 printk(KERN_ERR "pktgen: ERROR: out of memory, can't "
3697 "create new thread.\n");
3698 return -ENOMEM;
3699 }
3700
3701 spin_lock_init(&t->if_lock);
3702 t->cpu = cpu;
3703
3704 INIT_LIST_HEAD(&t->if_list);
3705
3706 list_add_tail(&t->th_list, &pktgen_threads);
3707 init_completion(&t->start_done);
3708
3709 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu);
3710 if (IS_ERR(p)) {
3711 printk(KERN_ERR "pktgen: kernel_thread() failed "
3712 "for cpu %d\n", t->cpu);
3713 list_del(&t->th_list);
3714 kfree(t);
3715 return PTR_ERR(p);
3716 }
3717 kthread_bind(p, cpu);
3718 t->tsk = p;
3719
3720 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3721 &pktgen_thread_fops, t);
3722 if (!pe) {
3723 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3724 PG_PROC_DIR, t->tsk->comm);
3725 kthread_stop(p);
3726 list_del(&t->th_list);
3727 kfree(t);
3728 return -EINVAL;
3729 }
3730
3731 wake_up_process(p);
3732 wait_for_completion(&t->start_done);
3733
3734 return 0;
3735 }
3736
3737 /*
3738 * Removes a device from the thread if_list.
3739 */
3740 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3741 struct pktgen_dev *pkt_dev)
3742 {
3743 struct list_head *q, *n;
3744 struct pktgen_dev *p;
3745
3746 list_for_each_safe(q, n, &t->if_list) {
3747 p = list_entry(q, struct pktgen_dev, list);
3748 if (p == pkt_dev)
3749 list_del(&p->list);
3750 }
3751 }
3752
3753 static int pktgen_remove_device(struct pktgen_thread *t,
3754 struct pktgen_dev *pkt_dev)
3755 {
3756
3757 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev);
3758
3759 if (pkt_dev->running) {
3760 printk(KERN_WARNING "pktgen: WARNING: trying to remove a "
3761 "running interface, stopping it now.\n");
3762 pktgen_stop_device(pkt_dev);
3763 }
3764
3765 /* Dis-associate from the interface */
3766
3767 if (pkt_dev->odev) {
3768 dev_put(pkt_dev->odev);
3769 pkt_dev->odev = NULL;
3770 }
3771
3772 /* And update the thread if_list */
3773
3774 _rem_dev_from_if_list(t, pkt_dev);
3775
3776 if (pkt_dev->entry)
3777 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3778
3779 #ifdef CONFIG_XFRM
3780 free_SAs(pkt_dev);
3781 #endif
3782 if (pkt_dev->flows)
3783 vfree(pkt_dev->flows);
3784 kfree(pkt_dev);
3785 return 0;
3786 }
3787
3788 static int __init pg_init(void)
3789 {
3790 int cpu;
3791 struct proc_dir_entry *pe;
3792
3793 printk(KERN_INFO "%s", version);
3794
3795 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3796 if (!pg_proc_dir)
3797 return -ENODEV;
3798 pg_proc_dir->owner = THIS_MODULE;
3799
3800 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3801 if (pe == NULL) {
3802 printk(KERN_ERR "pktgen: ERROR: cannot create %s "
3803 "procfs entry.\n", PGCTRL);
3804 proc_net_remove(&init_net, PG_PROC_DIR);
3805 return -EINVAL;
3806 }
3807
3808 /* Register us to receive netdevice events */
3809 register_netdevice_notifier(&pktgen_notifier_block);
3810
3811 for_each_online_cpu(cpu) {
3812 int err;
3813
3814 err = pktgen_create_thread(cpu);
3815 if (err)
3816 printk(KERN_WARNING "pktgen: WARNING: Cannot create "
3817 "thread for cpu %d (%d)\n", cpu, err);
3818 }
3819
3820 if (list_empty(&pktgen_threads)) {
3821 printk(KERN_ERR "pktgen: ERROR: Initialization failed for "
3822 "all threads\n");
3823 unregister_netdevice_notifier(&pktgen_notifier_block);
3824 remove_proc_entry(PGCTRL, pg_proc_dir);
3825 proc_net_remove(&init_net, PG_PROC_DIR);
3826 return -ENODEV;
3827 }
3828
3829 return 0;
3830 }
3831
3832 static void __exit pg_cleanup(void)
3833 {
3834 struct pktgen_thread *t;
3835 struct list_head *q, *n;
3836 wait_queue_head_t queue;
3837 init_waitqueue_head(&queue);
3838
3839 /* Stop all interfaces & threads */
3840
3841 list_for_each_safe(q, n, &pktgen_threads) {
3842 t = list_entry(q, struct pktgen_thread, th_list);
3843 kthread_stop(t->tsk);
3844 kfree(t);
3845 }
3846
3847 /* Un-register us from receiving netdevice events */
3848 unregister_netdevice_notifier(&pktgen_notifier_block);
3849
3850 /* Clean up proc file system */
3851 remove_proc_entry(PGCTRL, pg_proc_dir);
3852 proc_net_remove(&init_net, PG_PROC_DIR);
3853 }
3854
3855 module_init(pg_init);
3856 module_exit(pg_cleanup);
3857
3858 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se");
3859 MODULE_DESCRIPTION("Packet Generator tool");
3860 MODULE_LICENSE("GPL");
3861 module_param(pg_count_d, int, 0);
3862 module_param(pg_delay_d, int, 0);
3863 module_param(pg_clone_skb_d, int, 0);
3864 module_param(debug, int, 0);
Support for the Chinese Samsung S3C2440 based development boards