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USB: xHCI: Isoc urb enqueue
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / core / pktgen.c
blob10a1ea72010d329295ce3936228aa5bffe7dc745
1 /*
2 * Authors:
3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
4 * Uppsala University and
5 * Swedish University of Agricultural Sciences
6 *
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 * Ben Greear <greearb@candelatech.com>
9 * Jens Låås <jens.laas@data.slu.se>
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 *
16 *
17 * A tool for loading the network with preconfigurated packets.
18 * The tool is implemented as a linux module. Parameters are output
19 * device, delay (to hard_xmit), number of packets, and whether
20 * to use multiple SKBs or just the same one.
21 * pktgen uses the installed interface's output routine.
22 *
23 * Additional hacking by:
24 *
25 * Jens.Laas@data.slu.se
26 * Improved by ANK. 010120.
27 * Improved by ANK even more. 010212.
28 * MAC address typo fixed. 010417 --ro
29 * Integrated. 020301 --DaveM
30 * Added multiskb option 020301 --DaveM
31 * Scaling of results. 020417--sigurdur@linpro.no
32 * Significant re-work of the module:
33 * * Convert to threaded model to more efficiently be able to transmit
34 * and receive on multiple interfaces at once.
35 * * Converted many counters to __u64 to allow longer runs.
36 * * Allow configuration of ranges, like min/max IP address, MACs,
37 * and UDP-ports, for both source and destination, and can
38 * set to use a random distribution or sequentially walk the range.
39 * * Can now change most values after starting.
40 * * Place 12-byte packet in UDP payload with magic number,
41 * sequence number, and timestamp.
42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and
43 * latencies (with micro-second) precision.
44 * * Add IOCTL interface to easily get counters & configuration.
45 * --Ben Greear <greearb@candelatech.com>
46 *
47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
49 * as a "fastpath" with a configurable number of clones after alloc's.
50 * clone_skb=0 means all packets are allocated this also means ranges time
51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
52 * clones.
53 *
54 * Also moved to /proc/net/pktgen/
55 * --ro
56 *
57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
58 * mistakes. Also merged in DaveM's patch in the -pre6 patch.
59 * --Ben Greear <greearb@candelatech.com>
60 *
61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
62 *
63 *
64 * 021124 Finished major redesign and rewrite for new functionality.
65 * See Documentation/networking/pktgen.txt for how to use this.
66 *
67 * The new operation:
68 * For each CPU one thread/process is created at start. This process checks
69 * for running devices in the if_list and sends packets until count is 0 it
70 * also the thread checks the thread->control which is used for inter-process
71 * communication. controlling process "posts" operations to the threads this
72 * way. The if_lock should be possible to remove when add/rem_device is merged
73 * into this too.
74 *
75 * By design there should only be *one* "controlling" process. In practice
76 * multiple write accesses gives unpredictable result. Understood by "write"
77 * to /proc gives result code thats should be read be the "writer".
78 * For practical use this should be no problem.
79 *
80 * Note when adding devices to a specific CPU there good idea to also assign
81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
82 * --ro
83 *
84 * Fix refcount off by one if first packet fails, potential null deref,
85 * memleak 030710- KJP
86 *
87 * First "ranges" functionality for ipv6 030726 --ro
88 *
89 * Included flow support. 030802 ANK.
90 *
91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
92 *
93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
95 *
96 * New xmit() return, do_div and misc clean up by Stephen Hemminger
97 * <shemminger@osdl.org> 040923
98 *
99 * Randy Dunlap fixed u64 printk compiler waring
100 *
101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
103 *
104 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
106 *
107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
108 * 050103
109 *
110 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
111 *
112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
113 *
114 * Fixed src_mac command to set source mac of packet to value specified in
115 * command by Adit Ranadive <adit.262@gmail.com>
116 *
117 */
118
119 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
120
121 #include <linux/sys.h>
122 #include <linux/types.h>
123 #include <linux/module.h>
124 #include <linux/moduleparam.h>
125 #include <linux/kernel.h>
126 #include <linux/mutex.h>
127 #include <linux/sched.h>
128 #include <linux/slab.h>
129 #include <linux/vmalloc.h>
130 #include <linux/unistd.h>
131 #include <linux/string.h>
132 #include <linux/ptrace.h>
133 #include <linux/errno.h>
134 #include <linux/ioport.h>
135 #include <linux/interrupt.h>
136 #include <linux/capability.h>
137 #include <linux/hrtimer.h>
138 #include <linux/freezer.h>
139 #include <linux/delay.h>
140 #include <linux/timer.h>
141 #include <linux/list.h>
142 #include <linux/init.h>
143 #include <linux/skbuff.h>
144 #include <linux/netdevice.h>
145 #include <linux/inet.h>
146 #include <linux/inetdevice.h>
147 #include <linux/rtnetlink.h>
148 #include <linux/if_arp.h>
149 #include <linux/if_vlan.h>
150 #include <linux/in.h>
151 #include <linux/ip.h>
152 #include <linux/ipv6.h>
153 #include <linux/udp.h>
154 #include <linux/proc_fs.h>
155 #include <linux/seq_file.h>
156 #include <linux/wait.h>
157 #include <linux/etherdevice.h>
158 #include <linux/kthread.h>
159 #include <net/net_namespace.h>
160 #include <net/checksum.h>
161 #include <net/ipv6.h>
162 #include <net/addrconf.h>
163 #ifdef CONFIG_XFRM
164 #include <net/xfrm.h>
165 #endif
166 #include <asm/byteorder.h>
167 #include <linux/rcupdate.h>
168 #include <linux/bitops.h>
169 #include <linux/io.h>
170 #include <linux/timex.h>
171 #include <linux/uaccess.h>
172 #include <asm/dma.h>
173 #include <asm/div64.h> /* do_div */
174
175 #define VERSION "2.74"
176 #define IP_NAME_SZ 32
177 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
178 #define MPLS_STACK_BOTTOM htonl(0x00000100)
179
180 #define func_enter() pr_debug("entering %s\n", __func__);
181
182 /* Device flag bits */
183 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
184 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
185 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
186 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
187 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
188 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
189 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
190 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
191 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
192 #define F_VID_RND (1<<9) /* Random VLAN ID */
193 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
194 #define F_FLOW_SEQ (1<<11) /* Sequential flows */
195 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */
196 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
197 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
198 #define F_NODE (1<<15) /* Node memory alloc*/
199
200 /* Thread control flag bits */
201 #define T_STOP (1<<0) /* Stop run */
202 #define T_RUN (1<<1) /* Start run */
203 #define T_REMDEVALL (1<<2) /* Remove all devs */
204 #define T_REMDEV (1<<3) /* Remove one dev */
205
206 /* If lock -- can be removed after some work */
207 #define if_lock(t) spin_lock(&(t->if_lock));
208 #define if_unlock(t) spin_unlock(&(t->if_lock));
209
210 /* Used to help with determining the pkts on receive */
211 #define PKTGEN_MAGIC 0xbe9be955
212 #define PG_PROC_DIR "pktgen"
213 #define PGCTRL "pgctrl"
214 static struct proc_dir_entry *pg_proc_dir;
215
216 #define MAX_CFLOWS 65536
217
218 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
219 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
220
221 struct flow_state {
222 __be32 cur_daddr;
223 int count;
224 #ifdef CONFIG_XFRM
225 struct xfrm_state *x;
226 #endif
227 __u32 flags;
228 };
229
230 /* flow flag bits */
231 #define F_INIT (1<<0) /* flow has been initialized */
232
233 struct pktgen_dev {
234 /*
235 * Try to keep frequent/infrequent used vars. separated.
236 */
237 struct proc_dir_entry *entry; /* proc file */
238 struct pktgen_thread *pg_thread;/* the owner */
239 struct list_head list; /* chaining in the thread's run-queue */
240
241 int running; /* if false, the test will stop */
242
243 /* If min != max, then we will either do a linear iteration, or
244 * we will do a random selection from within the range.
245 */
246 __u32 flags;
247 int removal_mark; /* non-zero => the device is marked for
248 * removal by worker thread */
249
250 int min_pkt_size; /* = ETH_ZLEN; */
251 int max_pkt_size; /* = ETH_ZLEN; */
252 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
253 int nfrags;
254 u64 delay; /* nano-seconds */
255
256 __u64 count; /* Default No packets to send */
257 __u64 sofar; /* How many pkts we've sent so far */
258 __u64 tx_bytes; /* How many bytes we've transmitted */
259 __u64 errors; /* Errors when trying to transmit, */
260
261 /* runtime counters relating to clone_skb */
262
263 __u64 allocated_skbs;
264 __u32 clone_count;
265 int last_ok; /* Was last skb sent?
266 * Or a failed transmit of some sort?
267 * This will keep sequence numbers in order
268 */
269 ktime_t next_tx;
270 ktime_t started_at;
271 ktime_t stopped_at;
272 u64 idle_acc; /* nano-seconds */
273
274 __u32 seq_num;
275
276 int clone_skb; /*
277 * Use multiple SKBs during packet gen.
278 * If this number is greater than 1, then
279 * that many copies of the same packet will be
280 * sent before a new packet is allocated.
281 * If you want to send 1024 identical packets
282 * before creating a new packet,
283 * set clone_skb to 1024.
284 */
285
286 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
287 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
288 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
289 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
290
291 struct in6_addr in6_saddr;
292 struct in6_addr in6_daddr;
293 struct in6_addr cur_in6_daddr;
294 struct in6_addr cur_in6_saddr;
295 /* For ranges */
296 struct in6_addr min_in6_daddr;
297 struct in6_addr max_in6_daddr;
298 struct in6_addr min_in6_saddr;
299 struct in6_addr max_in6_saddr;
300
301 /* If we're doing ranges, random or incremental, then this
302 * defines the min/max for those ranges.
303 */
304 __be32 saddr_min; /* inclusive, source IP address */
305 __be32 saddr_max; /* exclusive, source IP address */
306 __be32 daddr_min; /* inclusive, dest IP address */
307 __be32 daddr_max; /* exclusive, dest IP address */
308
309 __u16 udp_src_min; /* inclusive, source UDP port */
310 __u16 udp_src_max; /* exclusive, source UDP port */
311 __u16 udp_dst_min; /* inclusive, dest UDP port */
312 __u16 udp_dst_max; /* exclusive, dest UDP port */
313
314 /* DSCP + ECN */
315 __u8 tos; /* six MSB of (former) IPv4 TOS
316 are for dscp codepoint */
317 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
318 (see RFC 3260, sec. 4) */
319
320 /* MPLS */
321 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
322 __be32 labels[MAX_MPLS_LABELS];
323
324 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
325 __u8 vlan_p;
326 __u8 vlan_cfi;
327 __u16 vlan_id; /* 0xffff means no vlan tag */
328
329 __u8 svlan_p;
330 __u8 svlan_cfi;
331 __u16 svlan_id; /* 0xffff means no svlan tag */
332
333 __u32 src_mac_count; /* How many MACs to iterate through */
334 __u32 dst_mac_count; /* How many MACs to iterate through */
335
336 unsigned char dst_mac[ETH_ALEN];
337 unsigned char src_mac[ETH_ALEN];
338
339 __u32 cur_dst_mac_offset;
340 __u32 cur_src_mac_offset;
341 __be32 cur_saddr;
342 __be32 cur_daddr;
343 __u16 ip_id;
344 __u16 cur_udp_dst;
345 __u16 cur_udp_src;
346 __u16 cur_queue_map;
347 __u32 cur_pkt_size;
348 __u32 last_pkt_size;
349
350 __u8 hh[14];
351 /* = {
352 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
353
354 We fill in SRC address later
355 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
356 0x08, 0x00
357 };
358 */
359 __u16 pad; /* pad out the hh struct to an even 16 bytes */
360
361 struct sk_buff *skb; /* skb we are to transmit next, used for when we
362 * are transmitting the same one multiple times
363 */
364 struct net_device *odev; /* The out-going device.
365 * Note that the device should have it's
366 * pg_info pointer pointing back to this
367 * device.
368 * Set when the user specifies the out-going
369 * device name (not when the inject is
370 * started as it used to do.)
371 */
372 char odevname[32];
373 struct flow_state *flows;
374 unsigned cflows; /* Concurrent flows (config) */
375 unsigned lflow; /* Flow length (config) */
376 unsigned nflows; /* accumulated flows (stats) */
377 unsigned curfl; /* current sequenced flow (state)*/
378
379 u16 queue_map_min;
380 u16 queue_map_max;
381 int node; /* Memory node */
382
383 #ifdef CONFIG_XFRM
384 __u8 ipsmode; /* IPSEC mode (config) */
385 __u8 ipsproto; /* IPSEC type (config) */
386 #endif
387 char result[512];
388 };
389
390 struct pktgen_hdr {
391 __be32 pgh_magic;
392 __be32 seq_num;
393 __be32 tv_sec;
394 __be32 tv_usec;
395 };
396
397 struct pktgen_thread {
398 spinlock_t if_lock; /* for list of devices */
399 struct list_head if_list; /* All device here */
400 struct list_head th_list;
401 struct task_struct *tsk;
402 char result[512];
403
404 /* Field for thread to receive "posted" events terminate,
405 stop ifs etc. */
406
407 u32 control;
408 int cpu;
409
410 wait_queue_head_t queue;
411 struct completion start_done;
412 };
413
414 #define REMOVE 1
415 #define FIND 0
416
417 static inline ktime_t ktime_now(void)
418 {
419 struct timespec ts;
420 ktime_get_ts(&ts);
421
422 return timespec_to_ktime(ts);
423 }
424
425 /* This works even if 32 bit because of careful byte order choice */
426 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2)
427 {
428 return cmp1.tv64 < cmp2.tv64;
429 }
430
431 static const char version[] =
432 "Packet Generator for packet performance testing. "
433 "Version: " VERSION "\n";
434
435 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
436 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
437 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
438 const char *ifname, bool exact);
439 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
440 static void pktgen_run_all_threads(void);
441 static void pktgen_reset_all_threads(void);
442 static void pktgen_stop_all_threads_ifs(void);
443
444 static void pktgen_stop(struct pktgen_thread *t);
445 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
446
447 static unsigned int scan_ip6(const char *s, char ip[16]);
448 static unsigned int fmt_ip6(char *s, const char ip[16]);
449
450 /* Module parameters, defaults. */
451 static int pg_count_d __read_mostly = 1000;
452 static int pg_delay_d __read_mostly;
453 static int pg_clone_skb_d __read_mostly;
454 static int debug __read_mostly;
455
456 static DEFINE_MUTEX(pktgen_thread_lock);
457 static LIST_HEAD(pktgen_threads);
458
459 static struct notifier_block pktgen_notifier_block = {
460 .notifier_call = pktgen_device_event,
461 };
462
463 /*
464 * /proc handling functions
465 *
466 */
467
468 static int pgctrl_show(struct seq_file *seq, void *v)
469 {
470 seq_puts(seq, version);
471 return 0;
472 }
473
474 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
475 size_t count, loff_t *ppos)
476 {
477 int err = 0;
478 char data[128];
479
480 if (!capable(CAP_NET_ADMIN)) {
481 err = -EPERM;
482 goto out;
483 }
484
485 if (count > sizeof(data))
486 count = sizeof(data);
487
488 if (copy_from_user(data, buf, count)) {
489 err = -EFAULT;
490 goto out;
491 }
492 data[count - 1] = 0; /* Make string */
493
494 if (!strcmp(data, "stop"))
495 pktgen_stop_all_threads_ifs();
496
497 else if (!strcmp(data, "start"))
498 pktgen_run_all_threads();
499
500 else if (!strcmp(data, "reset"))
501 pktgen_reset_all_threads();
502
503 else
504 pr_warning("Unknown command: %s\n", data);
505
506 err = count;
507
508 out:
509 return err;
510 }
511
512 static int pgctrl_open(struct inode *inode, struct file *file)
513 {
514 return single_open(file, pgctrl_show, PDE(inode)->data);
515 }
516
517 static const struct file_operations pktgen_fops = {
518 .owner = THIS_MODULE,
519 .open = pgctrl_open,
520 .read = seq_read,
521 .llseek = seq_lseek,
522 .write = pgctrl_write,
523 .release = single_release,
524 };
525
526 static int pktgen_if_show(struct seq_file *seq, void *v)
527 {
528 const struct pktgen_dev *pkt_dev = seq->private;
529 ktime_t stopped;
530 u64 idle;
531
532 seq_printf(seq,
533 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
534 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
535 pkt_dev->max_pkt_size);
536
537 seq_printf(seq,
538 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
539 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
540 pkt_dev->clone_skb, pkt_dev->odevname);
541
542 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
543 pkt_dev->lflow);
544
545 seq_printf(seq,
546 " queue_map_min: %u queue_map_max: %u\n",
547 pkt_dev->queue_map_min,
548 pkt_dev->queue_map_max);
549
550 if (pkt_dev->flags & F_IPV6) {
551 char b1[128], b2[128], b3[128];
552 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
553 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
554 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
555 seq_printf(seq,
556 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
557 b2, b3);
558
559 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
560 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
561 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
562 seq_printf(seq,
563 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
564 b2, b3);
565
566 } else {
567 seq_printf(seq,
568 " dst_min: %s dst_max: %s\n",
569 pkt_dev->dst_min, pkt_dev->dst_max);
570 seq_printf(seq,
571 " src_min: %s src_max: %s\n",
572 pkt_dev->src_min, pkt_dev->src_max);
573 }
574
575 seq_puts(seq, " src_mac: ");
576
577 seq_printf(seq, "%pM ",
578 is_zero_ether_addr(pkt_dev->src_mac) ?
579 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
580
581 seq_printf(seq, "dst_mac: ");
582 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
583
584 seq_printf(seq,
585 " udp_src_min: %d udp_src_max: %d"
586 " udp_dst_min: %d udp_dst_max: %d\n",
587 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
588 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
589
590 seq_printf(seq,
591 " src_mac_count: %d dst_mac_count: %d\n",
592 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
593
594 if (pkt_dev->nr_labels) {
595 unsigned i;
596 seq_printf(seq, " mpls: ");
597 for (i = 0; i < pkt_dev->nr_labels; i++)
598 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
599 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
600 }
601
602 if (pkt_dev->vlan_id != 0xffff)
603 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
604 pkt_dev->vlan_id, pkt_dev->vlan_p,
605 pkt_dev->vlan_cfi);
606
607 if (pkt_dev->svlan_id != 0xffff)
608 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
609 pkt_dev->svlan_id, pkt_dev->svlan_p,
610 pkt_dev->svlan_cfi);
611
612 if (pkt_dev->tos)
613 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
614
615 if (pkt_dev->traffic_class)
616 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
617
618 if (pkt_dev->node >= 0)
619 seq_printf(seq, " node: %d\n", pkt_dev->node);
620
621 seq_printf(seq, " Flags: ");
622
623 if (pkt_dev->flags & F_IPV6)
624 seq_printf(seq, "IPV6 ");
625
626 if (pkt_dev->flags & F_IPSRC_RND)
627 seq_printf(seq, "IPSRC_RND ");
628
629 if (pkt_dev->flags & F_IPDST_RND)
630 seq_printf(seq, "IPDST_RND ");
631
632 if (pkt_dev->flags & F_TXSIZE_RND)
633 seq_printf(seq, "TXSIZE_RND ");
634
635 if (pkt_dev->flags & F_UDPSRC_RND)
636 seq_printf(seq, "UDPSRC_RND ");
637
638 if (pkt_dev->flags & F_UDPDST_RND)
639 seq_printf(seq, "UDPDST_RND ");
640
641 if (pkt_dev->flags & F_MPLS_RND)
642 seq_printf(seq, "MPLS_RND ");
643
644 if (pkt_dev->flags & F_QUEUE_MAP_RND)
645 seq_printf(seq, "QUEUE_MAP_RND ");
646
647 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
648 seq_printf(seq, "QUEUE_MAP_CPU ");
649
650 if (pkt_dev->cflows) {
651 if (pkt_dev->flags & F_FLOW_SEQ)
652 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
653 else
654 seq_printf(seq, "FLOW_RND ");
655 }
656
657 #ifdef CONFIG_XFRM
658 if (pkt_dev->flags & F_IPSEC_ON)
659 seq_printf(seq, "IPSEC ");
660 #endif
661
662 if (pkt_dev->flags & F_MACSRC_RND)
663 seq_printf(seq, "MACSRC_RND ");
664
665 if (pkt_dev->flags & F_MACDST_RND)
666 seq_printf(seq, "MACDST_RND ");
667
668 if (pkt_dev->flags & F_VID_RND)
669 seq_printf(seq, "VID_RND ");
670
671 if (pkt_dev->flags & F_SVID_RND)
672 seq_printf(seq, "SVID_RND ");
673
674 if (pkt_dev->flags & F_NODE)
675 seq_printf(seq, "NODE_ALLOC ");
676
677 seq_puts(seq, "\n");
678
679 /* not really stopped, more like last-running-at */
680 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at;
681 idle = pkt_dev->idle_acc;
682 do_div(idle, NSEC_PER_USEC);
683
684 seq_printf(seq,
685 "Current:\n pkts-sofar: %llu errors: %llu\n",
686 (unsigned long long)pkt_dev->sofar,
687 (unsigned long long)pkt_dev->errors);
688
689 seq_printf(seq,
690 " started: %lluus stopped: %lluus idle: %lluus\n",
691 (unsigned long long) ktime_to_us(pkt_dev->started_at),
692 (unsigned long long) ktime_to_us(stopped),
693 (unsigned long long) idle);
694
695 seq_printf(seq,
696 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
697 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
698 pkt_dev->cur_src_mac_offset);
699
700 if (pkt_dev->flags & F_IPV6) {
701 char b1[128], b2[128];
702 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
703 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
704 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
705 } else
706 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
707 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
708
709 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
710 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
711
712 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
713
714 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
715
716 if (pkt_dev->result[0])
717 seq_printf(seq, "Result: %s\n", pkt_dev->result);
718 else
719 seq_printf(seq, "Result: Idle\n");
720
721 return 0;
722 }
723
724
725 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
726 __u32 *num)
727 {
728 int i = 0;
729 *num = 0;
730
731 for (; i < maxlen; i++) {
732 char c;
733 *num <<= 4;
734 if (get_user(c, &user_buffer[i]))
735 return -EFAULT;
736 if ((c >= '0') && (c <= '9'))
737 *num |= c - '0';
738 else if ((c >= 'a') && (c <= 'f'))
739 *num |= c - 'a' + 10;
740 else if ((c >= 'A') && (c <= 'F'))
741 *num |= c - 'A' + 10;
742 else
743 break;
744 }
745 return i;
746 }
747
748 static int count_trail_chars(const char __user * user_buffer,
749 unsigned int maxlen)
750 {
751 int i;
752
753 for (i = 0; i < maxlen; i++) {
754 char c;
755 if (get_user(c, &user_buffer[i]))
756 return -EFAULT;
757 switch (c) {
758 case '\"':
759 case '\n':
760 case '\r':
761 case '\t':
762 case ' ':
763 case '=':
764 break;
765 default:
766 goto done;
767 }
768 }
769 done:
770 return i;
771 }
772
773 static unsigned long num_arg(const char __user * user_buffer,
774 unsigned long maxlen, unsigned long *num)
775 {
776 int i = 0;
777 *num = 0;
778
779 for (; i < maxlen; i++) {
780 char c;
781 if (get_user(c, &user_buffer[i]))
782 return -EFAULT;
783 if ((c >= '0') && (c <= '9')) {
784 *num *= 10;
785 *num += c - '0';
786 } else
787 break;
788 }
789 return i;
790 }
791
792 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
793 {
794 int i = 0;
795
796 for (; i < maxlen; i++) {
797 char c;
798 if (get_user(c, &user_buffer[i]))
799 return -EFAULT;
800 switch (c) {
801 case '\"':
802 case '\n':
803 case '\r':
804 case '\t':
805 case ' ':
806 goto done_str;
807 break;
808 default:
809 break;
810 }
811 }
812 done_str:
813 return i;
814 }
815
816 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
817 {
818 unsigned n = 0;
819 char c;
820 ssize_t i = 0;
821 int len;
822
823 pkt_dev->nr_labels = 0;
824 do {
825 __u32 tmp;
826 len = hex32_arg(&buffer[i], 8, &tmp);
827 if (len <= 0)
828 return len;
829 pkt_dev->labels[n] = htonl(tmp);
830 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
831 pkt_dev->flags |= F_MPLS_RND;
832 i += len;
833 if (get_user(c, &buffer[i]))
834 return -EFAULT;
835 i++;
836 n++;
837 if (n >= MAX_MPLS_LABELS)
838 return -E2BIG;
839 } while (c == ',');
840
841 pkt_dev->nr_labels = n;
842 return i;
843 }
844
845 static ssize_t pktgen_if_write(struct file *file,
846 const char __user * user_buffer, size_t count,
847 loff_t * offset)
848 {
849 struct seq_file *seq = file->private_data;
850 struct pktgen_dev *pkt_dev = seq->private;
851 int i = 0, max, len;
852 char name[16], valstr[32];
853 unsigned long value = 0;
854 char *pg_result = NULL;
855 int tmp = 0;
856 char buf[128];
857
858 pg_result = &(pkt_dev->result[0]);
859
860 if (count < 1) {
861 pr_warning("wrong command format\n");
862 return -EINVAL;
863 }
864
865 max = count - i;
866 tmp = count_trail_chars(&user_buffer[i], max);
867 if (tmp < 0) {
868 pr_warning("illegal format\n");
869 return tmp;
870 }
871 i += tmp;
872
873 /* Read variable name */
874
875 len = strn_len(&user_buffer[i], sizeof(name) - 1);
876 if (len < 0)
877 return len;
878
879 memset(name, 0, sizeof(name));
880 if (copy_from_user(name, &user_buffer[i], len))
881 return -EFAULT;
882 i += len;
883
884 max = count - i;
885 len = count_trail_chars(&user_buffer[i], max);
886 if (len < 0)
887 return len;
888
889 i += len;
890
891 if (debug) {
892 char tb[count + 1];
893 if (copy_from_user(tb, user_buffer, count))
894 return -EFAULT;
895 tb[count] = 0;
896 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name,
897 (unsigned long)count, tb);
898 }
899
900 if (!strcmp(name, "min_pkt_size")) {
901 len = num_arg(&user_buffer[i], 10, &value);
902 if (len < 0)
903 return len;
904
905 i += len;
906 if (value < 14 + 20 + 8)
907 value = 14 + 20 + 8;
908 if (value != pkt_dev->min_pkt_size) {
909 pkt_dev->min_pkt_size = value;
910 pkt_dev->cur_pkt_size = value;
911 }
912 sprintf(pg_result, "OK: min_pkt_size=%u",
913 pkt_dev->min_pkt_size);
914 return count;
915 }
916
917 if (!strcmp(name, "max_pkt_size")) {
918 len = num_arg(&user_buffer[i], 10, &value);
919 if (len < 0)
920 return len;
921
922 i += len;
923 if (value < 14 + 20 + 8)
924 value = 14 + 20 + 8;
925 if (value != pkt_dev->max_pkt_size) {
926 pkt_dev->max_pkt_size = value;
927 pkt_dev->cur_pkt_size = value;
928 }
929 sprintf(pg_result, "OK: max_pkt_size=%u",
930 pkt_dev->max_pkt_size);
931 return count;
932 }
933
934 /* Shortcut for min = max */
935
936 if (!strcmp(name, "pkt_size")) {
937 len = num_arg(&user_buffer[i], 10, &value);
938 if (len < 0)
939 return len;
940
941 i += len;
942 if (value < 14 + 20 + 8)
943 value = 14 + 20 + 8;
944 if (value != pkt_dev->min_pkt_size) {
945 pkt_dev->min_pkt_size = value;
946 pkt_dev->max_pkt_size = value;
947 pkt_dev->cur_pkt_size = value;
948 }
949 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
950 return count;
951 }
952
953 if (!strcmp(name, "debug")) {
954 len = num_arg(&user_buffer[i], 10, &value);
955 if (len < 0)
956 return len;
957
958 i += len;
959 debug = value;
960 sprintf(pg_result, "OK: debug=%u", debug);
961 return count;
962 }
963
964 if (!strcmp(name, "frags")) {
965 len = num_arg(&user_buffer[i], 10, &value);
966 if (len < 0)
967 return len;
968
969 i += len;
970 pkt_dev->nfrags = value;
971 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
972 return count;
973 }
974 if (!strcmp(name, "delay")) {
975 len = num_arg(&user_buffer[i], 10, &value);
976 if (len < 0)
977 return len;
978
979 i += len;
980 if (value == 0x7FFFFFFF)
981 pkt_dev->delay = ULLONG_MAX;
982 else
983 pkt_dev->delay = (u64)value;
984
985 sprintf(pg_result, "OK: delay=%llu",
986 (unsigned long long) pkt_dev->delay);
987 return count;
988 }
989 if (!strcmp(name, "rate")) {
990 len = num_arg(&user_buffer[i], 10, &value);
991 if (len < 0)
992 return len;
993
994 i += len;
995 if (!value)
996 return len;
997 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
998 if (debug)
999 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1000
1001 sprintf(pg_result, "OK: rate=%lu", value);
1002 return count;
1003 }
1004 if (!strcmp(name, "ratep")) {
1005 len = num_arg(&user_buffer[i], 10, &value);
1006 if (len < 0)
1007 return len;
1008
1009 i += len;
1010 if (!value)
1011 return len;
1012 pkt_dev->delay = NSEC_PER_SEC/value;
1013 if (debug)
1014 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1015
1016 sprintf(pg_result, "OK: rate=%lu", value);
1017 return count;
1018 }
1019 if (!strcmp(name, "udp_src_min")) {
1020 len = num_arg(&user_buffer[i], 10, &value);
1021 if (len < 0)
1022 return len;
1023
1024 i += len;
1025 if (value != pkt_dev->udp_src_min) {
1026 pkt_dev->udp_src_min = value;
1027 pkt_dev->cur_udp_src = value;
1028 }
1029 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1030 return count;
1031 }
1032 if (!strcmp(name, "udp_dst_min")) {
1033 len = num_arg(&user_buffer[i], 10, &value);
1034 if (len < 0)
1035 return len;
1036
1037 i += len;
1038 if (value != pkt_dev->udp_dst_min) {
1039 pkt_dev->udp_dst_min = value;
1040 pkt_dev->cur_udp_dst = value;
1041 }
1042 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1043 return count;
1044 }
1045 if (!strcmp(name, "udp_src_max")) {
1046 len = num_arg(&user_buffer[i], 10, &value);
1047 if (len < 0)
1048 return len;
1049
1050 i += len;
1051 if (value != pkt_dev->udp_src_max) {
1052 pkt_dev->udp_src_max = value;
1053 pkt_dev->cur_udp_src = value;
1054 }
1055 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1056 return count;
1057 }
1058 if (!strcmp(name, "udp_dst_max")) {
1059 len = num_arg(&user_buffer[i], 10, &value);
1060 if (len < 0)
1061 return len;
1062
1063 i += len;
1064 if (value != pkt_dev->udp_dst_max) {
1065 pkt_dev->udp_dst_max = value;
1066 pkt_dev->cur_udp_dst = value;
1067 }
1068 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1069 return count;
1070 }
1071 if (!strcmp(name, "clone_skb")) {
1072 len = num_arg(&user_buffer[i], 10, &value);
1073 if (len < 0)
1074 return len;
1075
1076 i += len;
1077 pkt_dev->clone_skb = value;
1078
1079 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1080 return count;
1081 }
1082 if (!strcmp(name, "count")) {
1083 len = num_arg(&user_buffer[i], 10, &value);
1084 if (len < 0)
1085 return len;
1086
1087 i += len;
1088 pkt_dev->count = value;
1089 sprintf(pg_result, "OK: count=%llu",
1090 (unsigned long long)pkt_dev->count);
1091 return count;
1092 }
1093 if (!strcmp(name, "src_mac_count")) {
1094 len = num_arg(&user_buffer[i], 10, &value);
1095 if (len < 0)
1096 return len;
1097
1098 i += len;
1099 if (pkt_dev->src_mac_count != value) {
1100 pkt_dev->src_mac_count = value;
1101 pkt_dev->cur_src_mac_offset = 0;
1102 }
1103 sprintf(pg_result, "OK: src_mac_count=%d",
1104 pkt_dev->src_mac_count);
1105 return count;
1106 }
1107 if (!strcmp(name, "dst_mac_count")) {
1108 len = num_arg(&user_buffer[i], 10, &value);
1109 if (len < 0)
1110 return len;
1111
1112 i += len;
1113 if (pkt_dev->dst_mac_count != value) {
1114 pkt_dev->dst_mac_count = value;
1115 pkt_dev->cur_dst_mac_offset = 0;
1116 }
1117 sprintf(pg_result, "OK: dst_mac_count=%d",
1118 pkt_dev->dst_mac_count);
1119 return count;
1120 }
1121 if (!strcmp(name, "node")) {
1122 len = num_arg(&user_buffer[i], 10, &value);
1123 if (len < 0)
1124 return len;
1125
1126 i += len;
1127
1128 if (node_possible(value)) {
1129 pkt_dev->node = value;
1130 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1131 }
1132 else
1133 sprintf(pg_result, "ERROR: node not possible");
1134 return count;
1135 }
1136 if (!strcmp(name, "flag")) {
1137 char f[32];
1138 memset(f, 0, 32);
1139 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1140 if (len < 0)
1141 return len;
1142
1143 if (copy_from_user(f, &user_buffer[i], len))
1144 return -EFAULT;
1145 i += len;
1146 if (strcmp(f, "IPSRC_RND") == 0)
1147 pkt_dev->flags |= F_IPSRC_RND;
1148
1149 else if (strcmp(f, "!IPSRC_RND") == 0)
1150 pkt_dev->flags &= ~F_IPSRC_RND;
1151
1152 else if (strcmp(f, "TXSIZE_RND") == 0)
1153 pkt_dev->flags |= F_TXSIZE_RND;
1154
1155 else if (strcmp(f, "!TXSIZE_RND") == 0)
1156 pkt_dev->flags &= ~F_TXSIZE_RND;
1157
1158 else if (strcmp(f, "IPDST_RND") == 0)
1159 pkt_dev->flags |= F_IPDST_RND;
1160
1161 else if (strcmp(f, "!IPDST_RND") == 0)
1162 pkt_dev->flags &= ~F_IPDST_RND;
1163
1164 else if (strcmp(f, "UDPSRC_RND") == 0)
1165 pkt_dev->flags |= F_UDPSRC_RND;
1166
1167 else if (strcmp(f, "!UDPSRC_RND") == 0)
1168 pkt_dev->flags &= ~F_UDPSRC_RND;
1169
1170 else if (strcmp(f, "UDPDST_RND") == 0)
1171 pkt_dev->flags |= F_UDPDST_RND;
1172
1173 else if (strcmp(f, "!UDPDST_RND") == 0)
1174 pkt_dev->flags &= ~F_UDPDST_RND;
1175
1176 else if (strcmp(f, "MACSRC_RND") == 0)
1177 pkt_dev->flags |= F_MACSRC_RND;
1178
1179 else if (strcmp(f, "!MACSRC_RND") == 0)
1180 pkt_dev->flags &= ~F_MACSRC_RND;
1181
1182 else if (strcmp(f, "MACDST_RND") == 0)
1183 pkt_dev->flags |= F_MACDST_RND;
1184
1185 else if (strcmp(f, "!MACDST_RND") == 0)
1186 pkt_dev->flags &= ~F_MACDST_RND;
1187
1188 else if (strcmp(f, "MPLS_RND") == 0)
1189 pkt_dev->flags |= F_MPLS_RND;
1190
1191 else if (strcmp(f, "!MPLS_RND") == 0)
1192 pkt_dev->flags &= ~F_MPLS_RND;
1193
1194 else if (strcmp(f, "VID_RND") == 0)
1195 pkt_dev->flags |= F_VID_RND;
1196
1197 else if (strcmp(f, "!VID_RND") == 0)
1198 pkt_dev->flags &= ~F_VID_RND;
1199
1200 else if (strcmp(f, "SVID_RND") == 0)
1201 pkt_dev->flags |= F_SVID_RND;
1202
1203 else if (strcmp(f, "!SVID_RND") == 0)
1204 pkt_dev->flags &= ~F_SVID_RND;
1205
1206 else if (strcmp(f, "FLOW_SEQ") == 0)
1207 pkt_dev->flags |= F_FLOW_SEQ;
1208
1209 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1210 pkt_dev->flags |= F_QUEUE_MAP_RND;
1211
1212 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1213 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1214
1215 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1216 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1217
1218 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1219 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1220 #ifdef CONFIG_XFRM
1221 else if (strcmp(f, "IPSEC") == 0)
1222 pkt_dev->flags |= F_IPSEC_ON;
1223 #endif
1224
1225 else if (strcmp(f, "!IPV6") == 0)
1226 pkt_dev->flags &= ~F_IPV6;
1227
1228 else if (strcmp(f, "NODE_ALLOC") == 0)
1229 pkt_dev->flags |= F_NODE;
1230
1231 else if (strcmp(f, "!NODE_ALLOC") == 0)
1232 pkt_dev->flags &= ~F_NODE;
1233
1234 else {
1235 sprintf(pg_result,
1236 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1237 f,
1238 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1239 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n");
1240 return count;
1241 }
1242 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1243 return count;
1244 }
1245 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1246 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1247 if (len < 0)
1248 return len;
1249
1250 if (copy_from_user(buf, &user_buffer[i], len))
1251 return -EFAULT;
1252 buf[len] = 0;
1253 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1254 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1255 strncpy(pkt_dev->dst_min, buf, len);
1256 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1257 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1258 }
1259 if (debug)
1260 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1261 pkt_dev->dst_min);
1262 i += len;
1263 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1264 return count;
1265 }
1266 if (!strcmp(name, "dst_max")) {
1267 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1268 if (len < 0)
1269 return len;
1270
1271
1272 if (copy_from_user(buf, &user_buffer[i], len))
1273 return -EFAULT;
1274
1275 buf[len] = 0;
1276 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1277 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1278 strncpy(pkt_dev->dst_max, buf, len);
1279 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1280 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1281 }
1282 if (debug)
1283 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1284 pkt_dev->dst_max);
1285 i += len;
1286 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1287 return count;
1288 }
1289 if (!strcmp(name, "dst6")) {
1290 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1291 if (len < 0)
1292 return len;
1293
1294 pkt_dev->flags |= F_IPV6;
1295
1296 if (copy_from_user(buf, &user_buffer[i], len))
1297 return -EFAULT;
1298 buf[len] = 0;
1299
1300 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1301 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1302
1303 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1304
1305 if (debug)
1306 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1307
1308 i += len;
1309 sprintf(pg_result, "OK: dst6=%s", buf);
1310 return count;
1311 }
1312 if (!strcmp(name, "dst6_min")) {
1313 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1314 if (len < 0)
1315 return len;
1316
1317 pkt_dev->flags |= F_IPV6;
1318
1319 if (copy_from_user(buf, &user_buffer[i], len))
1320 return -EFAULT;
1321 buf[len] = 0;
1322
1323 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1324 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1325
1326 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1327 &pkt_dev->min_in6_daddr);
1328 if (debug)
1329 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1330
1331 i += len;
1332 sprintf(pg_result, "OK: dst6_min=%s", buf);
1333 return count;
1334 }
1335 if (!strcmp(name, "dst6_max")) {
1336 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1337 if (len < 0)
1338 return len;
1339
1340 pkt_dev->flags |= F_IPV6;
1341
1342 if (copy_from_user(buf, &user_buffer[i], len))
1343 return -EFAULT;
1344 buf[len] = 0;
1345
1346 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1347 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1348
1349 if (debug)
1350 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1351
1352 i += len;
1353 sprintf(pg_result, "OK: dst6_max=%s", buf);
1354 return count;
1355 }
1356 if (!strcmp(name, "src6")) {
1357 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1358 if (len < 0)
1359 return len;
1360
1361 pkt_dev->flags |= F_IPV6;
1362
1363 if (copy_from_user(buf, &user_buffer[i], len))
1364 return -EFAULT;
1365 buf[len] = 0;
1366
1367 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1368 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1369
1370 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1371
1372 if (debug)
1373 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1374
1375 i += len;
1376 sprintf(pg_result, "OK: src6=%s", buf);
1377 return count;
1378 }
1379 if (!strcmp(name, "src_min")) {
1380 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1381 if (len < 0)
1382 return len;
1383
1384 if (copy_from_user(buf, &user_buffer[i], len))
1385 return -EFAULT;
1386 buf[len] = 0;
1387 if (strcmp(buf, pkt_dev->src_min) != 0) {
1388 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1389 strncpy(pkt_dev->src_min, buf, len);
1390 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1391 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1392 }
1393 if (debug)
1394 printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1395 pkt_dev->src_min);
1396 i += len;
1397 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1398 return count;
1399 }
1400 if (!strcmp(name, "src_max")) {
1401 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1402 if (len < 0)
1403 return len;
1404
1405 if (copy_from_user(buf, &user_buffer[i], len))
1406 return -EFAULT;
1407 buf[len] = 0;
1408 if (strcmp(buf, pkt_dev->src_max) != 0) {
1409 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1410 strncpy(pkt_dev->src_max, buf, len);
1411 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1412 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1413 }
1414 if (debug)
1415 printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1416 pkt_dev->src_max);
1417 i += len;
1418 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1419 return count;
1420 }
1421 if (!strcmp(name, "dst_mac")) {
1422 char *v = valstr;
1423 unsigned char old_dmac[ETH_ALEN];
1424 unsigned char *m = pkt_dev->dst_mac;
1425 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1426
1427 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1428 if (len < 0)
1429 return len;
1430
1431 memset(valstr, 0, sizeof(valstr));
1432 if (copy_from_user(valstr, &user_buffer[i], len))
1433 return -EFAULT;
1434 i += len;
1435
1436 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1437 int value;
1438
1439 value = hex_to_bin(*v);
1440 if (value >= 0)
1441 *m = *m * 16 + value;
1442
1443 if (*v == ':') {
1444 m++;
1445 *m = 0;
1446 }
1447 }
1448
1449 /* Set up Dest MAC */
1450 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1451 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1452
1453 sprintf(pg_result, "OK: dstmac");
1454 return count;
1455 }
1456 if (!strcmp(name, "src_mac")) {
1457 char *v = valstr;
1458 unsigned char old_smac[ETH_ALEN];
1459 unsigned char *m = pkt_dev->src_mac;
1460
1461 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN);
1462
1463 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1464 if (len < 0)
1465 return len;
1466
1467 memset(valstr, 0, sizeof(valstr));
1468 if (copy_from_user(valstr, &user_buffer[i], len))
1469 return -EFAULT;
1470 i += len;
1471
1472 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1473 int value;
1474
1475 value = hex_to_bin(*v);
1476 if (value >= 0)
1477 *m = *m * 16 + value;
1478
1479 if (*v == ':') {
1480 m++;
1481 *m = 0;
1482 }
1483 }
1484
1485 /* Set up Src MAC */
1486 if (compare_ether_addr(old_smac, pkt_dev->src_mac))
1487 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN);
1488
1489 sprintf(pg_result, "OK: srcmac");
1490 return count;
1491 }
1492
1493 if (!strcmp(name, "clear_counters")) {
1494 pktgen_clear_counters(pkt_dev);
1495 sprintf(pg_result, "OK: Clearing counters.\n");
1496 return count;
1497 }
1498
1499 if (!strcmp(name, "flows")) {
1500 len = num_arg(&user_buffer[i], 10, &value);
1501 if (len < 0)
1502 return len;
1503
1504 i += len;
1505 if (value > MAX_CFLOWS)
1506 value = MAX_CFLOWS;
1507
1508 pkt_dev->cflows = value;
1509 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1510 return count;
1511 }
1512
1513 if (!strcmp(name, "flowlen")) {
1514 len = num_arg(&user_buffer[i], 10, &value);
1515 if (len < 0)
1516 return len;
1517
1518 i += len;
1519 pkt_dev->lflow = value;
1520 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1521 return count;
1522 }
1523
1524 if (!strcmp(name, "queue_map_min")) {
1525 len = num_arg(&user_buffer[i], 5, &value);
1526 if (len < 0)
1527 return len;
1528
1529 i += len;
1530 pkt_dev->queue_map_min = value;
1531 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1532 return count;
1533 }
1534
1535 if (!strcmp(name, "queue_map_max")) {
1536 len = num_arg(&user_buffer[i], 5, &value);
1537 if (len < 0)
1538 return len;
1539
1540 i += len;
1541 pkt_dev->queue_map_max = value;
1542 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1543 return count;
1544 }
1545
1546 if (!strcmp(name, "mpls")) {
1547 unsigned n, cnt;
1548
1549 len = get_labels(&user_buffer[i], pkt_dev);
1550 if (len < 0)
1551 return len;
1552 i += len;
1553 cnt = sprintf(pg_result, "OK: mpls=");
1554 for (n = 0; n < pkt_dev->nr_labels; n++)
1555 cnt += sprintf(pg_result + cnt,
1556 "%08x%s", ntohl(pkt_dev->labels[n]),
1557 n == pkt_dev->nr_labels-1 ? "" : ",");
1558
1559 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1560 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1561 pkt_dev->svlan_id = 0xffff;
1562
1563 if (debug)
1564 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1565 }
1566 return count;
1567 }
1568
1569 if (!strcmp(name, "vlan_id")) {
1570 len = num_arg(&user_buffer[i], 4, &value);
1571 if (len < 0)
1572 return len;
1573
1574 i += len;
1575 if (value <= 4095) {
1576 pkt_dev->vlan_id = value; /* turn on VLAN */
1577
1578 if (debug)
1579 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1580
1581 if (debug && pkt_dev->nr_labels)
1582 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1583
1584 pkt_dev->nr_labels = 0; /* turn off MPLS */
1585 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1586 } else {
1587 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1588 pkt_dev->svlan_id = 0xffff;
1589
1590 if (debug)
1591 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1592 }
1593 return count;
1594 }
1595
1596 if (!strcmp(name, "vlan_p")) {
1597 len = num_arg(&user_buffer[i], 1, &value);
1598 if (len < 0)
1599 return len;
1600
1601 i += len;
1602 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1603 pkt_dev->vlan_p = value;
1604 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1605 } else {
1606 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1607 }
1608 return count;
1609 }
1610
1611 if (!strcmp(name, "vlan_cfi")) {
1612 len = num_arg(&user_buffer[i], 1, &value);
1613 if (len < 0)
1614 return len;
1615
1616 i += len;
1617 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1618 pkt_dev->vlan_cfi = value;
1619 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1620 } else {
1621 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1622 }
1623 return count;
1624 }
1625
1626 if (!strcmp(name, "svlan_id")) {
1627 len = num_arg(&user_buffer[i], 4, &value);
1628 if (len < 0)
1629 return len;
1630
1631 i += len;
1632 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1633 pkt_dev->svlan_id = value; /* turn on SVLAN */
1634
1635 if (debug)
1636 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1637
1638 if (debug && pkt_dev->nr_labels)
1639 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1640
1641 pkt_dev->nr_labels = 0; /* turn off MPLS */
1642 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1643 } else {
1644 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1645 pkt_dev->svlan_id = 0xffff;
1646
1647 if (debug)
1648 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1649 }
1650 return count;
1651 }
1652
1653 if (!strcmp(name, "svlan_p")) {
1654 len = num_arg(&user_buffer[i], 1, &value);
1655 if (len < 0)
1656 return len;
1657
1658 i += len;
1659 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1660 pkt_dev->svlan_p = value;
1661 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1662 } else {
1663 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1664 }
1665 return count;
1666 }
1667
1668 if (!strcmp(name, "svlan_cfi")) {
1669 len = num_arg(&user_buffer[i], 1, &value);
1670 if (len < 0)
1671 return len;
1672
1673 i += len;
1674 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1675 pkt_dev->svlan_cfi = value;
1676 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1677 } else {
1678 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1679 }
1680 return count;
1681 }
1682
1683 if (!strcmp(name, "tos")) {
1684 __u32 tmp_value = 0;
1685 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1686 if (len < 0)
1687 return len;
1688
1689 i += len;
1690 if (len == 2) {
1691 pkt_dev->tos = tmp_value;
1692 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1693 } else {
1694 sprintf(pg_result, "ERROR: tos must be 00-ff");
1695 }
1696 return count;
1697 }
1698
1699 if (!strcmp(name, "traffic_class")) {
1700 __u32 tmp_value = 0;
1701 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1702 if (len < 0)
1703 return len;
1704
1705 i += len;
1706 if (len == 2) {
1707 pkt_dev->traffic_class = tmp_value;
1708 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1709 } else {
1710 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1711 }
1712 return count;
1713 }
1714
1715 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1716 return -EINVAL;
1717 }
1718
1719 static int pktgen_if_open(struct inode *inode, struct file *file)
1720 {
1721 return single_open(file, pktgen_if_show, PDE(inode)->data);
1722 }
1723
1724 static const struct file_operations pktgen_if_fops = {
1725 .owner = THIS_MODULE,
1726 .open = pktgen_if_open,
1727 .read = seq_read,
1728 .llseek = seq_lseek,
1729 .write = pktgen_if_write,
1730 .release = single_release,
1731 };
1732
1733 static int pktgen_thread_show(struct seq_file *seq, void *v)
1734 {
1735 struct pktgen_thread *t = seq->private;
1736 const struct pktgen_dev *pkt_dev;
1737
1738 BUG_ON(!t);
1739
1740 seq_printf(seq, "Running: ");
1741
1742 if_lock(t);
1743 list_for_each_entry(pkt_dev, &t->if_list, list)
1744 if (pkt_dev->running)
1745 seq_printf(seq, "%s ", pkt_dev->odevname);
1746
1747 seq_printf(seq, "\nStopped: ");
1748
1749 list_for_each_entry(pkt_dev, &t->if_list, list)
1750 if (!pkt_dev->running)
1751 seq_printf(seq, "%s ", pkt_dev->odevname);
1752
1753 if (t->result[0])
1754 seq_printf(seq, "\nResult: %s\n", t->result);
1755 else
1756 seq_printf(seq, "\nResult: NA\n");
1757
1758 if_unlock(t);
1759
1760 return 0;
1761 }
1762
1763 static ssize_t pktgen_thread_write(struct file *file,
1764 const char __user * user_buffer,
1765 size_t count, loff_t * offset)
1766 {
1767 struct seq_file *seq = file->private_data;
1768 struct pktgen_thread *t = seq->private;
1769 int i = 0, max, len, ret;
1770 char name[40];
1771 char *pg_result;
1772
1773 if (count < 1) {
1774 // sprintf(pg_result, "Wrong command format");
1775 return -EINVAL;
1776 }
1777
1778 max = count - i;
1779 len = count_trail_chars(&user_buffer[i], max);
1780 if (len < 0)
1781 return len;
1782
1783 i += len;
1784
1785 /* Read variable name */
1786
1787 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1788 if (len < 0)
1789 return len;
1790
1791 memset(name, 0, sizeof(name));
1792 if (copy_from_user(name, &user_buffer[i], len))
1793 return -EFAULT;
1794 i += len;
1795
1796 max = count - i;
1797 len = count_trail_chars(&user_buffer[i], max);
1798 if (len < 0)
1799 return len;
1800
1801 i += len;
1802
1803 if (debug)
1804 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1805 name, (unsigned long)count);
1806
1807 if (!t) {
1808 pr_err("ERROR: No thread\n");
1809 ret = -EINVAL;
1810 goto out;
1811 }
1812
1813 pg_result = &(t->result[0]);
1814
1815 if (!strcmp(name, "add_device")) {
1816 char f[32];
1817 memset(f, 0, 32);
1818 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1819 if (len < 0) {
1820 ret = len;
1821 goto out;
1822 }
1823 if (copy_from_user(f, &user_buffer[i], len))
1824 return -EFAULT;
1825 i += len;
1826 mutex_lock(&pktgen_thread_lock);
1827 pktgen_add_device(t, f);
1828 mutex_unlock(&pktgen_thread_lock);
1829 ret = count;
1830 sprintf(pg_result, "OK: add_device=%s", f);
1831 goto out;
1832 }
1833
1834 if (!strcmp(name, "rem_device_all")) {
1835 mutex_lock(&pktgen_thread_lock);
1836 t->control |= T_REMDEVALL;
1837 mutex_unlock(&pktgen_thread_lock);
1838 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1839 ret = count;
1840 sprintf(pg_result, "OK: rem_device_all");
1841 goto out;
1842 }
1843
1844 if (!strcmp(name, "max_before_softirq")) {
1845 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1846 ret = count;
1847 goto out;
1848 }
1849
1850 ret = -EINVAL;
1851 out:
1852 return ret;
1853 }
1854
1855 static int pktgen_thread_open(struct inode *inode, struct file *file)
1856 {
1857 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1858 }
1859
1860 static const struct file_operations pktgen_thread_fops = {
1861 .owner = THIS_MODULE,
1862 .open = pktgen_thread_open,
1863 .read = seq_read,
1864 .llseek = seq_lseek,
1865 .write = pktgen_thread_write,
1866 .release = single_release,
1867 };
1868
1869 /* Think find or remove for NN */
1870 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1871 {
1872 struct pktgen_thread *t;
1873 struct pktgen_dev *pkt_dev = NULL;
1874 bool exact = (remove == FIND);
1875
1876 list_for_each_entry(t, &pktgen_threads, th_list) {
1877 pkt_dev = pktgen_find_dev(t, ifname, exact);
1878 if (pkt_dev) {
1879 if (remove) {
1880 if_lock(t);
1881 pkt_dev->removal_mark = 1;
1882 t->control |= T_REMDEV;
1883 if_unlock(t);
1884 }
1885 break;
1886 }
1887 }
1888 return pkt_dev;
1889 }
1890
1891 /*
1892 * mark a device for removal
1893 */
1894 static void pktgen_mark_device(const char *ifname)
1895 {
1896 struct pktgen_dev *pkt_dev = NULL;
1897 const int max_tries = 10, msec_per_try = 125;
1898 int i = 0;
1899
1900 mutex_lock(&pktgen_thread_lock);
1901 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1902
1903 while (1) {
1904
1905 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1906 if (pkt_dev == NULL)
1907 break; /* success */
1908
1909 mutex_unlock(&pktgen_thread_lock);
1910 pr_debug("%s: waiting for %s to disappear....\n",
1911 __func__, ifname);
1912 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1913 mutex_lock(&pktgen_thread_lock);
1914
1915 if (++i >= max_tries) {
1916 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1917 __func__, msec_per_try * i, ifname);
1918 break;
1919 }
1920
1921 }
1922
1923 mutex_unlock(&pktgen_thread_lock);
1924 }
1925
1926 static void pktgen_change_name(struct net_device *dev)
1927 {
1928 struct pktgen_thread *t;
1929
1930 list_for_each_entry(t, &pktgen_threads, th_list) {
1931 struct pktgen_dev *pkt_dev;
1932
1933 list_for_each_entry(pkt_dev, &t->if_list, list) {
1934 if (pkt_dev->odev != dev)
1935 continue;
1936
1937 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1938
1939 pkt_dev->entry = proc_create_data(dev->name, 0600,
1940 pg_proc_dir,
1941 &pktgen_if_fops,
1942 pkt_dev);
1943 if (!pkt_dev->entry)
1944 pr_err("can't move proc entry for '%s'\n",
1945 dev->name);
1946 break;
1947 }
1948 }
1949 }
1950
1951 static int pktgen_device_event(struct notifier_block *unused,
1952 unsigned long event, void *ptr)
1953 {
1954 struct net_device *dev = ptr;
1955
1956 if (!net_eq(dev_net(dev), &init_net))
1957 return NOTIFY_DONE;
1958
1959 /* It is OK that we do not hold the group lock right now,
1960 * as we run under the RTNL lock.
1961 */
1962
1963 switch (event) {
1964 case NETDEV_CHANGENAME:
1965 pktgen_change_name(dev);
1966 break;
1967
1968 case NETDEV_UNREGISTER:
1969 pktgen_mark_device(dev->name);
1970 break;
1971 }
1972
1973 return NOTIFY_DONE;
1974 }
1975
1976 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev,
1977 const char *ifname)
1978 {
1979 char b[IFNAMSIZ+5];
1980 int i = 0;
1981
1982 for (i = 0; ifname[i] != '@'; i++) {
1983 if (i == IFNAMSIZ)
1984 break;
1985
1986 b[i] = ifname[i];
1987 }
1988 b[i] = 0;
1989
1990 return dev_get_by_name(&init_net, b);
1991 }
1992
1993
1994 /* Associate pktgen_dev with a device. */
1995
1996 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1997 {
1998 struct net_device *odev;
1999 int err;
2000
2001 /* Clean old setups */
2002 if (pkt_dev->odev) {
2003 dev_put(pkt_dev->odev);
2004 pkt_dev->odev = NULL;
2005 }
2006
2007 odev = pktgen_dev_get_by_name(pkt_dev, ifname);
2008 if (!odev) {
2009 pr_err("no such netdevice: \"%s\"\n", ifname);
2010 return -ENODEV;
2011 }
2012
2013 if (odev->type != ARPHRD_ETHER) {
2014 pr_err("not an ethernet device: \"%s\"\n", ifname);
2015 err = -EINVAL;
2016 } else if (!netif_running(odev)) {
2017 pr_err("device is down: \"%s\"\n", ifname);
2018 err = -ENETDOWN;
2019 } else {
2020 pkt_dev->odev = odev;
2021 return 0;
2022 }
2023
2024 dev_put(odev);
2025 return err;
2026 }
2027
2028 /* Read pkt_dev from the interface and set up internal pktgen_dev
2029 * structure to have the right information to create/send packets
2030 */
2031 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2032 {
2033 int ntxq;
2034
2035 if (!pkt_dev->odev) {
2036 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2037 sprintf(pkt_dev->result,
2038 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2039 return;
2040 }
2041
2042 /* make sure that we don't pick a non-existing transmit queue */
2043 ntxq = pkt_dev->odev->real_num_tx_queues;
2044
2045 if (ntxq <= pkt_dev->queue_map_min) {
2046 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2047 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2048 pkt_dev->odevname);
2049 pkt_dev->queue_map_min = ntxq - 1;
2050 }
2051 if (pkt_dev->queue_map_max >= ntxq) {
2052 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2053 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2054 pkt_dev->odevname);
2055 pkt_dev->queue_map_max = ntxq - 1;
2056 }
2057
2058 /* Default to the interface's mac if not explicitly set. */
2059
2060 if (is_zero_ether_addr(pkt_dev->src_mac))
2061 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2062
2063 /* Set up Dest MAC */
2064 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2065
2066 /* Set up pkt size */
2067 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2068
2069 if (pkt_dev->flags & F_IPV6) {
2070 /*
2071 * Skip this automatic address setting until locks or functions
2072 * gets exported
2073 */
2074
2075 #ifdef NOTNOW
2076 int i, set = 0, err = 1;
2077 struct inet6_dev *idev;
2078
2079 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2080 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2081 set = 1;
2082 break;
2083 }
2084
2085 if (!set) {
2086
2087 /*
2088 * Use linklevel address if unconfigured.
2089 *
2090 * use ipv6_get_lladdr if/when it's get exported
2091 */
2092
2093 rcu_read_lock();
2094 idev = __in6_dev_get(pkt_dev->odev);
2095 if (idev) {
2096 struct inet6_ifaddr *ifp;
2097
2098 read_lock_bh(&idev->lock);
2099 for (ifp = idev->addr_list; ifp;
2100 ifp = ifp->if_next) {
2101 if (ifp->scope == IFA_LINK &&
2102 !(ifp->flags & IFA_F_TENTATIVE)) {
2103 ipv6_addr_copy(&pkt_dev->
2104 cur_in6_saddr,
2105 &ifp->addr);
2106 err = 0;
2107 break;
2108 }
2109 }
2110 read_unlock_bh(&idev->lock);
2111 }
2112 rcu_read_unlock();
2113 if (err)
2114 pr_err("ERROR: IPv6 link address not available\n");
2115 }
2116 #endif
2117 } else {
2118 pkt_dev->saddr_min = 0;
2119 pkt_dev->saddr_max = 0;
2120 if (strlen(pkt_dev->src_min) == 0) {
2121
2122 struct in_device *in_dev;
2123
2124 rcu_read_lock();
2125 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2126 if (in_dev) {
2127 if (in_dev->ifa_list) {
2128 pkt_dev->saddr_min =
2129 in_dev->ifa_list->ifa_address;
2130 pkt_dev->saddr_max = pkt_dev->saddr_min;
2131 }
2132 }
2133 rcu_read_unlock();
2134 } else {
2135 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2136 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2137 }
2138
2139 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2140 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2141 }
2142 /* Initialize current values. */
2143 pkt_dev->cur_dst_mac_offset = 0;
2144 pkt_dev->cur_src_mac_offset = 0;
2145 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2146 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2147 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2148 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2149 pkt_dev->nflows = 0;
2150 }
2151
2152
2153 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2154 {
2155 ktime_t start_time, end_time;
2156 s64 remaining;
2157 struct hrtimer_sleeper t;
2158
2159 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2160 hrtimer_set_expires(&t.timer, spin_until);
2161
2162 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2163 if (remaining <= 0) {
2164 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2165 return;
2166 }
2167
2168 start_time = ktime_now();
2169 if (remaining < 100000)
2170 ndelay(remaining); /* really small just spin */
2171 else {
2172 /* see do_nanosleep */
2173 hrtimer_init_sleeper(&t, current);
2174 do {
2175 set_current_state(TASK_INTERRUPTIBLE);
2176 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2177 if (!hrtimer_active(&t.timer))
2178 t.task = NULL;
2179
2180 if (likely(t.task))
2181 schedule();
2182
2183 hrtimer_cancel(&t.timer);
2184 } while (t.task && pkt_dev->running && !signal_pending(current));
2185 __set_current_state(TASK_RUNNING);
2186 }
2187 end_time = ktime_now();
2188
2189 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2190 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2191 }
2192
2193 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2194 {
2195 pkt_dev->pkt_overhead = 0;
2196 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2197 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2198 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2199 }
2200
2201 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2202 {
2203 return !!(pkt_dev->flows[flow].flags & F_INIT);
2204 }
2205
2206 static inline int f_pick(struct pktgen_dev *pkt_dev)
2207 {
2208 int flow = pkt_dev->curfl;
2209
2210 if (pkt_dev->flags & F_FLOW_SEQ) {
2211 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2212 /* reset time */
2213 pkt_dev->flows[flow].count = 0;
2214 pkt_dev->flows[flow].flags = 0;
2215 pkt_dev->curfl += 1;
2216 if (pkt_dev->curfl >= pkt_dev->cflows)
2217 pkt_dev->curfl = 0; /*reset */
2218 }
2219 } else {
2220 flow = random32() % pkt_dev->cflows;
2221 pkt_dev->curfl = flow;
2222
2223 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2224 pkt_dev->flows[flow].count = 0;
2225 pkt_dev->flows[flow].flags = 0;
2226 }
2227 }
2228
2229 return pkt_dev->curfl;
2230 }
2231
2232
2233 #ifdef CONFIG_XFRM
2234 /* If there was already an IPSEC SA, we keep it as is, else
2235 * we go look for it ...
2236 */
2237 #define DUMMY_MARK 0
2238 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2239 {
2240 struct xfrm_state *x = pkt_dev->flows[flow].x;
2241 if (!x) {
2242 /*slow path: we dont already have xfrm_state*/
2243 x = xfrm_stateonly_find(&init_net, DUMMY_MARK,
2244 (xfrm_address_t *)&pkt_dev->cur_daddr,
2245 (xfrm_address_t *)&pkt_dev->cur_saddr,
2246 AF_INET,
2247 pkt_dev->ipsmode,
2248 pkt_dev->ipsproto, 0);
2249 if (x) {
2250 pkt_dev->flows[flow].x = x;
2251 set_pkt_overhead(pkt_dev);
2252 pkt_dev->pkt_overhead += x->props.header_len;
2253 }
2254
2255 }
2256 }
2257 #endif
2258 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2259 {
2260
2261 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2262 pkt_dev->cur_queue_map = smp_processor_id();
2263
2264 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2265 __u16 t;
2266 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2267 t = random32() %
2268 (pkt_dev->queue_map_max -
2269 pkt_dev->queue_map_min + 1)
2270 + pkt_dev->queue_map_min;
2271 } else {
2272 t = pkt_dev->cur_queue_map + 1;
2273 if (t > pkt_dev->queue_map_max)
2274 t = pkt_dev->queue_map_min;
2275 }
2276 pkt_dev->cur_queue_map = t;
2277 }
2278 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2279 }
2280
2281 /* Increment/randomize headers according to flags and current values
2282 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2283 */
2284 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2285 {
2286 __u32 imn;
2287 __u32 imx;
2288 int flow = 0;
2289
2290 if (pkt_dev->cflows)
2291 flow = f_pick(pkt_dev);
2292
2293 /* Deal with source MAC */
2294 if (pkt_dev->src_mac_count > 1) {
2295 __u32 mc;
2296 __u32 tmp;
2297
2298 if (pkt_dev->flags & F_MACSRC_RND)
2299 mc = random32() % pkt_dev->src_mac_count;
2300 else {
2301 mc = pkt_dev->cur_src_mac_offset++;
2302 if (pkt_dev->cur_src_mac_offset >=
2303 pkt_dev->src_mac_count)
2304 pkt_dev->cur_src_mac_offset = 0;
2305 }
2306
2307 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2308 pkt_dev->hh[11] = tmp;
2309 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2310 pkt_dev->hh[10] = tmp;
2311 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2312 pkt_dev->hh[9] = tmp;
2313 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2314 pkt_dev->hh[8] = tmp;
2315 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2316 pkt_dev->hh[7] = tmp;
2317 }
2318
2319 /* Deal with Destination MAC */
2320 if (pkt_dev->dst_mac_count > 1) {
2321 __u32 mc;
2322 __u32 tmp;
2323
2324 if (pkt_dev->flags & F_MACDST_RND)
2325 mc = random32() % pkt_dev->dst_mac_count;
2326
2327 else {
2328 mc = pkt_dev->cur_dst_mac_offset++;
2329 if (pkt_dev->cur_dst_mac_offset >=
2330 pkt_dev->dst_mac_count) {
2331 pkt_dev->cur_dst_mac_offset = 0;
2332 }
2333 }
2334
2335 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2336 pkt_dev->hh[5] = tmp;
2337 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2338 pkt_dev->hh[4] = tmp;
2339 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2340 pkt_dev->hh[3] = tmp;
2341 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2342 pkt_dev->hh[2] = tmp;
2343 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2344 pkt_dev->hh[1] = tmp;
2345 }
2346
2347 if (pkt_dev->flags & F_MPLS_RND) {
2348 unsigned i;
2349 for (i = 0; i < pkt_dev->nr_labels; i++)
2350 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2351 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2352 ((__force __be32)random32() &
2353 htonl(0x000fffff));
2354 }
2355
2356 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2357 pkt_dev->vlan_id = random32() & (4096-1);
2358 }
2359
2360 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2361 pkt_dev->svlan_id = random32() & (4096 - 1);
2362 }
2363
2364 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2365 if (pkt_dev->flags & F_UDPSRC_RND)
2366 pkt_dev->cur_udp_src = random32() %
2367 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2368 + pkt_dev->udp_src_min;
2369
2370 else {
2371 pkt_dev->cur_udp_src++;
2372 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2373 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2374 }
2375 }
2376
2377 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2378 if (pkt_dev->flags & F_UDPDST_RND) {
2379 pkt_dev->cur_udp_dst = random32() %
2380 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2381 + pkt_dev->udp_dst_min;
2382 } else {
2383 pkt_dev->cur_udp_dst++;
2384 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2385 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2386 }
2387 }
2388
2389 if (!(pkt_dev->flags & F_IPV6)) {
2390
2391 imn = ntohl(pkt_dev->saddr_min);
2392 imx = ntohl(pkt_dev->saddr_max);
2393 if (imn < imx) {
2394 __u32 t;
2395 if (pkt_dev->flags & F_IPSRC_RND)
2396 t = random32() % (imx - imn) + imn;
2397 else {
2398 t = ntohl(pkt_dev->cur_saddr);
2399 t++;
2400 if (t > imx)
2401 t = imn;
2402
2403 }
2404 pkt_dev->cur_saddr = htonl(t);
2405 }
2406
2407 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2408 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2409 } else {
2410 imn = ntohl(pkt_dev->daddr_min);
2411 imx = ntohl(pkt_dev->daddr_max);
2412 if (imn < imx) {
2413 __u32 t;
2414 __be32 s;
2415 if (pkt_dev->flags & F_IPDST_RND) {
2416
2417 t = random32() % (imx - imn) + imn;
2418 s = htonl(t);
2419
2420 while (ipv4_is_loopback(s) ||
2421 ipv4_is_multicast(s) ||
2422 ipv4_is_lbcast(s) ||
2423 ipv4_is_zeronet(s) ||
2424 ipv4_is_local_multicast(s)) {
2425 t = random32() % (imx - imn) + imn;
2426 s = htonl(t);
2427 }
2428 pkt_dev->cur_daddr = s;
2429 } else {
2430 t = ntohl(pkt_dev->cur_daddr);
2431 t++;
2432 if (t > imx) {
2433 t = imn;
2434 }
2435 pkt_dev->cur_daddr = htonl(t);
2436 }
2437 }
2438 if (pkt_dev->cflows) {
2439 pkt_dev->flows[flow].flags |= F_INIT;
2440 pkt_dev->flows[flow].cur_daddr =
2441 pkt_dev->cur_daddr;
2442 #ifdef CONFIG_XFRM
2443 if (pkt_dev->flags & F_IPSEC_ON)
2444 get_ipsec_sa(pkt_dev, flow);
2445 #endif
2446 pkt_dev->nflows++;
2447 }
2448 }
2449 } else { /* IPV6 * */
2450
2451 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2452 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2453 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2454 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2455 else {
2456 int i;
2457
2458 /* Only random destinations yet */
2459
2460 for (i = 0; i < 4; i++) {
2461 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2462 (((__force __be32)random32() |
2463 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2464 pkt_dev->max_in6_daddr.s6_addr32[i]);
2465 }
2466 }
2467 }
2468
2469 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2470 __u32 t;
2471 if (pkt_dev->flags & F_TXSIZE_RND) {
2472 t = random32() %
2473 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2474 + pkt_dev->min_pkt_size;
2475 } else {
2476 t = pkt_dev->cur_pkt_size + 1;
2477 if (t > pkt_dev->max_pkt_size)
2478 t = pkt_dev->min_pkt_size;
2479 }
2480 pkt_dev->cur_pkt_size = t;
2481 }
2482
2483 set_cur_queue_map(pkt_dev);
2484
2485 pkt_dev->flows[flow].count++;
2486 }
2487
2488
2489 #ifdef CONFIG_XFRM
2490 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2491 {
2492 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2493 int err = 0;
2494 struct iphdr *iph;
2495
2496 if (!x)
2497 return 0;
2498 /* XXX: we dont support tunnel mode for now until
2499 * we resolve the dst issue */
2500 if (x->props.mode != XFRM_MODE_TRANSPORT)
2501 return 0;
2502
2503 spin_lock(&x->lock);
2504 iph = ip_hdr(skb);
2505
2506 err = x->outer_mode->output(x, skb);
2507 if (err)
2508 goto error;
2509 err = x->type->output(x, skb);
2510 if (err)
2511 goto error;
2512
2513 x->curlft.bytes += skb->len;
2514 x->curlft.packets++;
2515 error:
2516 spin_unlock(&x->lock);
2517 return err;
2518 }
2519
2520 static void free_SAs(struct pktgen_dev *pkt_dev)
2521 {
2522 if (pkt_dev->cflows) {
2523 /* let go of the SAs if we have them */
2524 int i = 0;
2525 for (; i < pkt_dev->cflows; i++) {
2526 struct xfrm_state *x = pkt_dev->flows[i].x;
2527 if (x) {
2528 xfrm_state_put(x);
2529 pkt_dev->flows[i].x = NULL;
2530 }
2531 }
2532 }
2533 }
2534
2535 static int process_ipsec(struct pktgen_dev *pkt_dev,
2536 struct sk_buff *skb, __be16 protocol)
2537 {
2538 if (pkt_dev->flags & F_IPSEC_ON) {
2539 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2540 int nhead = 0;
2541 if (x) {
2542 int ret;
2543 __u8 *eth;
2544 nhead = x->props.header_len - skb_headroom(skb);
2545 if (nhead > 0) {
2546 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2547 if (ret < 0) {
2548 pr_err("Error expanding ipsec packet %d\n",
2549 ret);
2550 goto err;
2551 }
2552 }
2553
2554 /* ipsec is not expecting ll header */
2555 skb_pull(skb, ETH_HLEN);
2556 ret = pktgen_output_ipsec(skb, pkt_dev);
2557 if (ret) {
2558 pr_err("Error creating ipsec packet %d\n", ret);
2559 goto err;
2560 }
2561 /* restore ll */
2562 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2563 memcpy(eth, pkt_dev->hh, 12);
2564 *(u16 *) &eth[12] = protocol;
2565 }
2566 }
2567 return 1;
2568 err:
2569 kfree_skb(skb);
2570 return 0;
2571 }
2572 #endif
2573
2574 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2575 {
2576 unsigned i;
2577 for (i = 0; i < pkt_dev->nr_labels; i++)
2578 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2579
2580 mpls--;
2581 *mpls |= MPLS_STACK_BOTTOM;
2582 }
2583
2584 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2585 unsigned int prio)
2586 {
2587 return htons(id | (cfi << 12) | (prio << 13));
2588 }
2589
2590 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2591 struct pktgen_dev *pkt_dev)
2592 {
2593 struct sk_buff *skb = NULL;
2594 __u8 *eth;
2595 struct udphdr *udph;
2596 int datalen, iplen;
2597 struct iphdr *iph;
2598 struct pktgen_hdr *pgh = NULL;
2599 __be16 protocol = htons(ETH_P_IP);
2600 __be32 *mpls;
2601 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2602 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2603 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2604 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2605 u16 queue_map;
2606
2607 if (pkt_dev->nr_labels)
2608 protocol = htons(ETH_P_MPLS_UC);
2609
2610 if (pkt_dev->vlan_id != 0xffff)
2611 protocol = htons(ETH_P_8021Q);
2612
2613 /* Update any of the values, used when we're incrementing various
2614 * fields.
2615 */
2616 queue_map = pkt_dev->cur_queue_map;
2617 mod_cur_headers(pkt_dev);
2618
2619 datalen = (odev->hard_header_len + 16) & ~0xf;
2620
2621 if (pkt_dev->flags & F_NODE) {
2622 int node;
2623
2624 if (pkt_dev->node >= 0)
2625 node = pkt_dev->node;
2626 else
2627 node = numa_node_id();
2628
2629 skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64
2630 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node);
2631 if (likely(skb)) {
2632 skb_reserve(skb, NET_SKB_PAD);
2633 skb->dev = odev;
2634 }
2635 }
2636 else
2637 skb = __netdev_alloc_skb(odev,
2638 pkt_dev->cur_pkt_size + 64
2639 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2640
2641 if (!skb) {
2642 sprintf(pkt_dev->result, "No memory");
2643 return NULL;
2644 }
2645
2646 skb_reserve(skb, datalen);
2647
2648 /* Reserve for ethernet and IP header */
2649 eth = (__u8 *) skb_push(skb, 14);
2650 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2651 if (pkt_dev->nr_labels)
2652 mpls_push(mpls, pkt_dev);
2653
2654 if (pkt_dev->vlan_id != 0xffff) {
2655 if (pkt_dev->svlan_id != 0xffff) {
2656 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2657 *svlan_tci = build_tci(pkt_dev->svlan_id,
2658 pkt_dev->svlan_cfi,
2659 pkt_dev->svlan_p);
2660 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2661 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2662 }
2663 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2664 *vlan_tci = build_tci(pkt_dev->vlan_id,
2665 pkt_dev->vlan_cfi,
2666 pkt_dev->vlan_p);
2667 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2668 *vlan_encapsulated_proto = htons(ETH_P_IP);
2669 }
2670
2671 skb->network_header = skb->tail;
2672 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2673 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2674 skb_set_queue_mapping(skb, queue_map);
2675 iph = ip_hdr(skb);
2676 udph = udp_hdr(skb);
2677
2678 memcpy(eth, pkt_dev->hh, 12);
2679 *(__be16 *) & eth[12] = protocol;
2680
2681 /* Eth + IPh + UDPh + mpls */
2682 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2683 pkt_dev->pkt_overhead;
2684 if (datalen < sizeof(struct pktgen_hdr))
2685 datalen = sizeof(struct pktgen_hdr);
2686
2687 udph->source = htons(pkt_dev->cur_udp_src);
2688 udph->dest = htons(pkt_dev->cur_udp_dst);
2689 udph->len = htons(datalen + 8); /* DATA + udphdr */
2690 udph->check = 0; /* No checksum */
2691
2692 iph->ihl = 5;
2693 iph->version = 4;
2694 iph->ttl = 32;
2695 iph->tos = pkt_dev->tos;
2696 iph->protocol = IPPROTO_UDP; /* UDP */
2697 iph->saddr = pkt_dev->cur_saddr;
2698 iph->daddr = pkt_dev->cur_daddr;
2699 iph->id = htons(pkt_dev->ip_id);
2700 pkt_dev->ip_id++;
2701 iph->frag_off = 0;
2702 iplen = 20 + 8 + datalen;
2703 iph->tot_len = htons(iplen);
2704 iph->check = 0;
2705 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2706 skb->protocol = protocol;
2707 skb->mac_header = (skb->network_header - ETH_HLEN -
2708 pkt_dev->pkt_overhead);
2709 skb->dev = odev;
2710 skb->pkt_type = PACKET_HOST;
2711
2712 if (pkt_dev->nfrags <= 0) {
2713 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2714 memset(pgh + 1, 0, datalen - sizeof(struct pktgen_hdr));
2715 } else {
2716 int frags = pkt_dev->nfrags;
2717 int i, len;
2718
2719 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2720
2721 if (frags > MAX_SKB_FRAGS)
2722 frags = MAX_SKB_FRAGS;
2723 if (datalen > frags * PAGE_SIZE) {
2724 len = datalen - frags * PAGE_SIZE;
2725 memset(skb_put(skb, len), 0, len);
2726 datalen = frags * PAGE_SIZE;
2727 }
2728
2729 i = 0;
2730 while (datalen > 0) {
2731 struct page *page = alloc_pages(GFP_KERNEL | __GFP_ZERO, 0);
2732 skb_shinfo(skb)->frags[i].page = page;
2733 skb_shinfo(skb)->frags[i].page_offset = 0;
2734 skb_shinfo(skb)->frags[i].size =
2735 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2736 datalen -= skb_shinfo(skb)->frags[i].size;
2737 skb->len += skb_shinfo(skb)->frags[i].size;
2738 skb->data_len += skb_shinfo(skb)->frags[i].size;
2739 i++;
2740 skb_shinfo(skb)->nr_frags = i;
2741 }
2742
2743 while (i < frags) {
2744 int rem;
2745
2746 if (i == 0)
2747 break;
2748
2749 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2750 if (rem == 0)
2751 break;
2752
2753 skb_shinfo(skb)->frags[i - 1].size -= rem;
2754
2755 skb_shinfo(skb)->frags[i] =
2756 skb_shinfo(skb)->frags[i - 1];
2757 get_page(skb_shinfo(skb)->frags[i].page);
2758 skb_shinfo(skb)->frags[i].page =
2759 skb_shinfo(skb)->frags[i - 1].page;
2760 skb_shinfo(skb)->frags[i].page_offset +=
2761 skb_shinfo(skb)->frags[i - 1].size;
2762 skb_shinfo(skb)->frags[i].size = rem;
2763 i++;
2764 skb_shinfo(skb)->nr_frags = i;
2765 }
2766 }
2767
2768 /* Stamp the time, and sequence number,
2769 * convert them to network byte order
2770 */
2771 if (pgh) {
2772 struct timeval timestamp;
2773
2774 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2775 pgh->seq_num = htonl(pkt_dev->seq_num);
2776
2777 do_gettimeofday(&timestamp);
2778 pgh->tv_sec = htonl(timestamp.tv_sec);
2779 pgh->tv_usec = htonl(timestamp.tv_usec);
2780 }
2781
2782 #ifdef CONFIG_XFRM
2783 if (!process_ipsec(pkt_dev, skb, protocol))
2784 return NULL;
2785 #endif
2786
2787 return skb;
2788 }
2789
2790 /*
2791 * scan_ip6, fmt_ip taken from dietlibc-0.21
2792 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2793 *
2794 * Slightly modified for kernel.
2795 * Should be candidate for net/ipv4/utils.c
2796 * --ro
2797 */
2798
2799 static unsigned int scan_ip6(const char *s, char ip[16])
2800 {
2801 unsigned int i;
2802 unsigned int len = 0;
2803 unsigned long u;
2804 char suffix[16];
2805 unsigned int prefixlen = 0;
2806 unsigned int suffixlen = 0;
2807 __be32 tmp;
2808 char *pos;
2809
2810 for (i = 0; i < 16; i++)
2811 ip[i] = 0;
2812
2813 for (;;) {
2814 if (*s == ':') {
2815 len++;
2816 if (s[1] == ':') { /* Found "::", skip to part 2 */
2817 s += 2;
2818 len++;
2819 break;
2820 }
2821 s++;
2822 }
2823
2824 u = simple_strtoul(s, &pos, 16);
2825 i = pos - s;
2826 if (!i)
2827 return 0;
2828 if (prefixlen == 12 && s[i] == '.') {
2829
2830 /* the last 4 bytes may be written as IPv4 address */
2831
2832 tmp = in_aton(s);
2833 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2834 return i + len;
2835 }
2836 ip[prefixlen++] = (u >> 8);
2837 ip[prefixlen++] = (u & 255);
2838 s += i;
2839 len += i;
2840 if (prefixlen == 16)
2841 return len;
2842 }
2843
2844 /* part 2, after "::" */
2845 for (;;) {
2846 if (*s == ':') {
2847 if (suffixlen == 0)
2848 break;
2849 s++;
2850 len++;
2851 } else if (suffixlen != 0)
2852 break;
2853
2854 u = simple_strtol(s, &pos, 16);
2855 i = pos - s;
2856 if (!i) {
2857 if (*s)
2858 len--;
2859 break;
2860 }
2861 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2862 tmp = in_aton(s);
2863 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2864 sizeof(tmp));
2865 suffixlen += 4;
2866 len += strlen(s);
2867 break;
2868 }
2869 suffix[suffixlen++] = (u >> 8);
2870 suffix[suffixlen++] = (u & 255);
2871 s += i;
2872 len += i;
2873 if (prefixlen + suffixlen == 16)
2874 break;
2875 }
2876 for (i = 0; i < suffixlen; i++)
2877 ip[16 - suffixlen + i] = suffix[i];
2878 return len;
2879 }
2880
2881 static char tohex(char hexdigit)
2882 {
2883 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2884 }
2885
2886 static int fmt_xlong(char *s, unsigned int i)
2887 {
2888 char *bak = s;
2889 *s = tohex((i >> 12) & 0xf);
2890 if (s != bak || *s != '0')
2891 ++s;
2892 *s = tohex((i >> 8) & 0xf);
2893 if (s != bak || *s != '0')
2894 ++s;
2895 *s = tohex((i >> 4) & 0xf);
2896 if (s != bak || *s != '0')
2897 ++s;
2898 *s = tohex(i & 0xf);
2899 return s - bak + 1;
2900 }
2901
2902 static unsigned int fmt_ip6(char *s, const char ip[16])
2903 {
2904 unsigned int len;
2905 unsigned int i;
2906 unsigned int temp;
2907 unsigned int compressing;
2908 int j;
2909
2910 len = 0;
2911 compressing = 0;
2912 for (j = 0; j < 16; j += 2) {
2913
2914 #ifdef V4MAPPEDPREFIX
2915 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2916 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2917 temp = strlen(s);
2918 return len + temp;
2919 }
2920 #endif
2921 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2922 (unsigned long)(unsigned char)ip[j + 1];
2923 if (temp == 0) {
2924 if (!compressing) {
2925 compressing = 1;
2926 if (j == 0) {
2927 *s++ = ':';
2928 ++len;
2929 }
2930 }
2931 } else {
2932 if (compressing) {
2933 compressing = 0;
2934 *s++ = ':';
2935 ++len;
2936 }
2937 i = fmt_xlong(s, temp);
2938 len += i;
2939 s += i;
2940 if (j < 14) {
2941 *s++ = ':';
2942 ++len;
2943 }
2944 }
2945 }
2946 if (compressing) {
2947 *s++ = ':';
2948 ++len;
2949 }
2950 *s = 0;
2951 return len;
2952 }
2953
2954 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2955 struct pktgen_dev *pkt_dev)
2956 {
2957 struct sk_buff *skb = NULL;
2958 __u8 *eth;
2959 struct udphdr *udph;
2960 int datalen;
2961 struct ipv6hdr *iph;
2962 struct pktgen_hdr *pgh = NULL;
2963 __be16 protocol = htons(ETH_P_IPV6);
2964 __be32 *mpls;
2965 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2966 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2967 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2968 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2969 u16 queue_map;
2970
2971 if (pkt_dev->nr_labels)
2972 protocol = htons(ETH_P_MPLS_UC);
2973
2974 if (pkt_dev->vlan_id != 0xffff)
2975 protocol = htons(ETH_P_8021Q);
2976
2977 /* Update any of the values, used when we're incrementing various
2978 * fields.
2979 */
2980 queue_map = pkt_dev->cur_queue_map;
2981 mod_cur_headers(pkt_dev);
2982
2983 skb = __netdev_alloc_skb(odev,
2984 pkt_dev->cur_pkt_size + 64
2985 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
2986 if (!skb) {
2987 sprintf(pkt_dev->result, "No memory");
2988 return NULL;
2989 }
2990
2991 skb_reserve(skb, 16);
2992
2993 /* Reserve for ethernet and IP header */
2994 eth = (__u8 *) skb_push(skb, 14);
2995 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2996 if (pkt_dev->nr_labels)
2997 mpls_push(mpls, pkt_dev);
2998
2999 if (pkt_dev->vlan_id != 0xffff) {
3000 if (pkt_dev->svlan_id != 0xffff) {
3001 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
3002 *svlan_tci = build_tci(pkt_dev->svlan_id,
3003 pkt_dev->svlan_cfi,
3004 pkt_dev->svlan_p);
3005 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
3006 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
3007 }
3008 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
3009 *vlan_tci = build_tci(pkt_dev->vlan_id,
3010 pkt_dev->vlan_cfi,
3011 pkt_dev->vlan_p);
3012 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
3013 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
3014 }
3015
3016 skb->network_header = skb->tail;
3017 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
3018 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
3019 skb_set_queue_mapping(skb, queue_map);
3020 iph = ipv6_hdr(skb);
3021 udph = udp_hdr(skb);
3022
3023 memcpy(eth, pkt_dev->hh, 12);
3024 *(__be16 *) &eth[12] = protocol;
3025
3026 /* Eth + IPh + UDPh + mpls */
3027 datalen = pkt_dev->cur_pkt_size - 14 -
3028 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
3029 pkt_dev->pkt_overhead;
3030
3031 if (datalen < sizeof(struct pktgen_hdr)) {
3032 datalen = sizeof(struct pktgen_hdr);
3033 if (net_ratelimit())
3034 pr_info("increased datalen to %d\n", datalen);
3035 }
3036
3037 udph->source = htons(pkt_dev->cur_udp_src);
3038 udph->dest = htons(pkt_dev->cur_udp_dst);
3039 udph->len = htons(datalen + sizeof(struct udphdr));
3040 udph->check = 0; /* No checksum */
3041
3042 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
3043
3044 if (pkt_dev->traffic_class) {
3045 /* Version + traffic class + flow (0) */
3046 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
3047 }
3048
3049 iph->hop_limit = 32;
3050
3051 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
3052 iph->nexthdr = IPPROTO_UDP;
3053
3054 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
3055 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
3056
3057 skb->mac_header = (skb->network_header - ETH_HLEN -
3058 pkt_dev->pkt_overhead);
3059 skb->protocol = protocol;
3060 skb->dev = odev;
3061 skb->pkt_type = PACKET_HOST;
3062
3063 if (pkt_dev->nfrags <= 0)
3064 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
3065 else {
3066 int frags = pkt_dev->nfrags;
3067 int i;
3068
3069 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
3070
3071 if (frags > MAX_SKB_FRAGS)
3072 frags = MAX_SKB_FRAGS;
3073 if (datalen > frags * PAGE_SIZE) {
3074 skb_put(skb, datalen - frags * PAGE_SIZE);
3075 datalen = frags * PAGE_SIZE;
3076 }
3077
3078 i = 0;
3079 while (datalen > 0) {
3080 struct page *page = alloc_pages(GFP_KERNEL, 0);
3081 skb_shinfo(skb)->frags[i].page = page;
3082 skb_shinfo(skb)->frags[i].page_offset = 0;
3083 skb_shinfo(skb)->frags[i].size =
3084 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
3085 datalen -= skb_shinfo(skb)->frags[i].size;
3086 skb->len += skb_shinfo(skb)->frags[i].size;
3087 skb->data_len += skb_shinfo(skb)->frags[i].size;
3088 i++;
3089 skb_shinfo(skb)->nr_frags = i;
3090 }
3091
3092 while (i < frags) {
3093 int rem;
3094
3095 if (i == 0)
3096 break;
3097
3098 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
3099 if (rem == 0)
3100 break;
3101
3102 skb_shinfo(skb)->frags[i - 1].size -= rem;
3103
3104 skb_shinfo(skb)->frags[i] =
3105 skb_shinfo(skb)->frags[i - 1];
3106 get_page(skb_shinfo(skb)->frags[i].page);
3107 skb_shinfo(skb)->frags[i].page =
3108 skb_shinfo(skb)->frags[i - 1].page;
3109 skb_shinfo(skb)->frags[i].page_offset +=
3110 skb_shinfo(skb)->frags[i - 1].size;
3111 skb_shinfo(skb)->frags[i].size = rem;
3112 i++;
3113 skb_shinfo(skb)->nr_frags = i;
3114 }
3115 }
3116
3117 /* Stamp the time, and sequence number,
3118 * convert them to network byte order
3119 * should we update cloned packets too ?
3120 */
3121 if (pgh) {
3122 struct timeval timestamp;
3123
3124 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
3125 pgh->seq_num = htonl(pkt_dev->seq_num);
3126
3127 do_gettimeofday(&timestamp);
3128 pgh->tv_sec = htonl(timestamp.tv_sec);
3129 pgh->tv_usec = htonl(timestamp.tv_usec);
3130 }
3131 /* pkt_dev->seq_num++; FF: you really mean this? */
3132
3133 return skb;
3134 }
3135
3136 static struct sk_buff *fill_packet(struct net_device *odev,
3137 struct pktgen_dev *pkt_dev)
3138 {
3139 if (pkt_dev->flags & F_IPV6)
3140 return fill_packet_ipv6(odev, pkt_dev);
3141 else
3142 return fill_packet_ipv4(odev, pkt_dev);
3143 }
3144
3145 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3146 {
3147 pkt_dev->seq_num = 1;
3148 pkt_dev->idle_acc = 0;
3149 pkt_dev->sofar = 0;
3150 pkt_dev->tx_bytes = 0;
3151 pkt_dev->errors = 0;
3152 }
3153
3154 /* Set up structure for sending pkts, clear counters */
3155
3156 static void pktgen_run(struct pktgen_thread *t)
3157 {
3158 struct pktgen_dev *pkt_dev;
3159 int started = 0;
3160
3161 func_enter();
3162
3163 if_lock(t);
3164 list_for_each_entry(pkt_dev, &t->if_list, list) {
3165
3166 /*
3167 * setup odev and create initial packet.
3168 */
3169 pktgen_setup_inject(pkt_dev);
3170
3171 if (pkt_dev->odev) {
3172 pktgen_clear_counters(pkt_dev);
3173 pkt_dev->running = 1; /* Cranke yeself! */
3174 pkt_dev->skb = NULL;
3175 pkt_dev->started_at =
3176 pkt_dev->next_tx = ktime_now();
3177
3178 set_pkt_overhead(pkt_dev);
3179
3180 strcpy(pkt_dev->result, "Starting");
3181 started++;
3182 } else
3183 strcpy(pkt_dev->result, "Error starting");
3184 }
3185 if_unlock(t);
3186 if (started)
3187 t->control &= ~(T_STOP);
3188 }
3189
3190 static void pktgen_stop_all_threads_ifs(void)
3191 {
3192 struct pktgen_thread *t;
3193
3194 func_enter();
3195
3196 mutex_lock(&pktgen_thread_lock);
3197
3198 list_for_each_entry(t, &pktgen_threads, th_list)
3199 t->control |= T_STOP;
3200
3201 mutex_unlock(&pktgen_thread_lock);
3202 }
3203
3204 static int thread_is_running(const struct pktgen_thread *t)
3205 {
3206 const struct pktgen_dev *pkt_dev;
3207
3208 list_for_each_entry(pkt_dev, &t->if_list, list)
3209 if (pkt_dev->running)
3210 return 1;
3211 return 0;
3212 }
3213
3214 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3215 {
3216 if_lock(t);
3217
3218 while (thread_is_running(t)) {
3219
3220 if_unlock(t);
3221
3222 msleep_interruptible(100);
3223
3224 if (signal_pending(current))
3225 goto signal;
3226 if_lock(t);
3227 }
3228 if_unlock(t);
3229 return 1;
3230 signal:
3231 return 0;
3232 }
3233
3234 static int pktgen_wait_all_threads_run(void)
3235 {
3236 struct pktgen_thread *t;
3237 int sig = 1;
3238
3239 mutex_lock(&pktgen_thread_lock);
3240
3241 list_for_each_entry(t, &pktgen_threads, th_list) {
3242 sig = pktgen_wait_thread_run(t);
3243 if (sig == 0)
3244 break;
3245 }
3246
3247 if (sig == 0)
3248 list_for_each_entry(t, &pktgen_threads, th_list)
3249 t->control |= (T_STOP);
3250
3251 mutex_unlock(&pktgen_thread_lock);
3252 return sig;
3253 }
3254
3255 static void pktgen_run_all_threads(void)
3256 {
3257 struct pktgen_thread *t;
3258
3259 func_enter();
3260
3261 mutex_lock(&pktgen_thread_lock);
3262
3263 list_for_each_entry(t, &pktgen_threads, th_list)
3264 t->control |= (T_RUN);
3265
3266 mutex_unlock(&pktgen_thread_lock);
3267
3268 /* Propagate thread->control */
3269 schedule_timeout_interruptible(msecs_to_jiffies(125));
3270
3271 pktgen_wait_all_threads_run();
3272 }
3273
3274 static void pktgen_reset_all_threads(void)
3275 {
3276 struct pktgen_thread *t;
3277
3278 func_enter();
3279
3280 mutex_lock(&pktgen_thread_lock);
3281
3282 list_for_each_entry(t, &pktgen_threads, th_list)
3283 t->control |= (T_REMDEVALL);
3284
3285 mutex_unlock(&pktgen_thread_lock);
3286
3287 /* Propagate thread->control */
3288 schedule_timeout_interruptible(msecs_to_jiffies(125));
3289
3290 pktgen_wait_all_threads_run();
3291 }
3292
3293 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3294 {
3295 __u64 bps, mbps, pps;
3296 char *p = pkt_dev->result;
3297 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3298 pkt_dev->started_at);
3299 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3300
3301 p += sprintf(p, "OK: %llu(c%llu+d%llu) nsec, %llu (%dbyte,%dfrags)\n",
3302 (unsigned long long)ktime_to_us(elapsed),
3303 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3304 (unsigned long long)ktime_to_us(idle),
3305 (unsigned long long)pkt_dev->sofar,
3306 pkt_dev->cur_pkt_size, nr_frags);
3307
3308 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3309 ktime_to_ns(elapsed));
3310
3311 bps = pps * 8 * pkt_dev->cur_pkt_size;
3312
3313 mbps = bps;
3314 do_div(mbps, 1000000);
3315 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3316 (unsigned long long)pps,
3317 (unsigned long long)mbps,
3318 (unsigned long long)bps,
3319 (unsigned long long)pkt_dev->errors);
3320 }
3321
3322 /* Set stopped-at timer, remove from running list, do counters & statistics */
3323 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3324 {
3325 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3326
3327 if (!pkt_dev->running) {
3328 pr_warning("interface: %s is already stopped\n",
3329 pkt_dev->odevname);
3330 return -EINVAL;
3331 }
3332
3333 kfree_skb(pkt_dev->skb);
3334 pkt_dev->skb = NULL;
3335 pkt_dev->stopped_at = ktime_now();
3336 pkt_dev->running = 0;
3337
3338 show_results(pkt_dev, nr_frags);
3339
3340 return 0;
3341 }
3342
3343 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3344 {
3345 struct pktgen_dev *pkt_dev, *best = NULL;
3346
3347 if_lock(t);
3348
3349 list_for_each_entry(pkt_dev, &t->if_list, list) {
3350 if (!pkt_dev->running)
3351 continue;
3352 if (best == NULL)
3353 best = pkt_dev;
3354 else if (ktime_lt(pkt_dev->next_tx, best->next_tx))
3355 best = pkt_dev;
3356 }
3357 if_unlock(t);
3358 return best;
3359 }
3360
3361 static void pktgen_stop(struct pktgen_thread *t)
3362 {
3363 struct pktgen_dev *pkt_dev;
3364
3365 func_enter();
3366
3367 if_lock(t);
3368
3369 list_for_each_entry(pkt_dev, &t->if_list, list) {
3370 pktgen_stop_device(pkt_dev);
3371 }
3372
3373 if_unlock(t);
3374 }
3375
3376 /*
3377 * one of our devices needs to be removed - find it
3378 * and remove it
3379 */
3380 static void pktgen_rem_one_if(struct pktgen_thread *t)
3381 {
3382 struct list_head *q, *n;
3383 struct pktgen_dev *cur;
3384
3385 func_enter();
3386
3387 if_lock(t);
3388
3389 list_for_each_safe(q, n, &t->if_list) {
3390 cur = list_entry(q, struct pktgen_dev, list);
3391
3392 if (!cur->removal_mark)
3393 continue;
3394
3395 kfree_skb(cur->skb);
3396 cur->skb = NULL;
3397
3398 pktgen_remove_device(t, cur);
3399
3400 break;
3401 }
3402
3403 if_unlock(t);
3404 }
3405
3406 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3407 {
3408 struct list_head *q, *n;
3409 struct pktgen_dev *cur;
3410
3411 func_enter();
3412
3413 /* Remove all devices, free mem */
3414
3415 if_lock(t);
3416
3417 list_for_each_safe(q, n, &t->if_list) {
3418 cur = list_entry(q, struct pktgen_dev, list);
3419
3420 kfree_skb(cur->skb);
3421 cur->skb = NULL;
3422
3423 pktgen_remove_device(t, cur);
3424 }
3425
3426 if_unlock(t);
3427 }
3428
3429 static void pktgen_rem_thread(struct pktgen_thread *t)
3430 {
3431 /* Remove from the thread list */
3432
3433 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3434
3435 mutex_lock(&pktgen_thread_lock);
3436
3437 list_del(&t->th_list);
3438
3439 mutex_unlock(&pktgen_thread_lock);
3440 }
3441
3442 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3443 {
3444 ktime_t idle_start = ktime_now();
3445 schedule();
3446 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3447 }
3448
3449 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3450 {
3451 ktime_t idle_start = ktime_now();
3452
3453 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3454 if (signal_pending(current))
3455 break;
3456
3457 if (need_resched())
3458 pktgen_resched(pkt_dev);
3459 else
3460 cpu_relax();
3461 }
3462 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3463 }
3464
3465 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3466 {
3467 struct net_device *odev = pkt_dev->odev;
3468 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3469 = odev->netdev_ops->ndo_start_xmit;
3470 struct netdev_queue *txq;
3471 u16 queue_map;
3472 int ret;
3473
3474 /* If device is offline, then don't send */
3475 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3476 pktgen_stop_device(pkt_dev);
3477 return;
3478 }
3479
3480 /* This is max DELAY, this has special meaning of
3481 * "never transmit"
3482 */
3483 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3484 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX);
3485 return;
3486 }
3487
3488 /* If no skb or clone count exhausted then get new one */
3489 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3490 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3491 /* build a new pkt */
3492 kfree_skb(pkt_dev->skb);
3493
3494 pkt_dev->skb = fill_packet(odev, pkt_dev);
3495 if (pkt_dev->skb == NULL) {
3496 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3497 schedule();
3498 pkt_dev->clone_count--; /* back out increment, OOM */
3499 return;
3500 }
3501 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3502 pkt_dev->allocated_skbs++;
3503 pkt_dev->clone_count = 0; /* reset counter */
3504 }
3505
3506 if (pkt_dev->delay && pkt_dev->last_ok)
3507 spin(pkt_dev, pkt_dev->next_tx);
3508
3509 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3510 txq = netdev_get_tx_queue(odev, queue_map);
3511
3512 __netif_tx_lock_bh(txq);
3513
3514 if (unlikely(netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq))) {
3515 ret = NETDEV_TX_BUSY;
3516 pkt_dev->last_ok = 0;
3517 goto unlock;
3518 }
3519 atomic_inc(&(pkt_dev->skb->users));
3520 ret = (*xmit)(pkt_dev->skb, odev);
3521
3522 switch (ret) {
3523 case NETDEV_TX_OK:
3524 txq_trans_update(txq);
3525 pkt_dev->last_ok = 1;
3526 pkt_dev->sofar++;
3527 pkt_dev->seq_num++;
3528 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3529 break;
3530 case NET_XMIT_DROP:
3531 case NET_XMIT_CN:
3532 case NET_XMIT_POLICED:
3533 /* skb has been consumed */
3534 pkt_dev->errors++;
3535 break;
3536 default: /* Drivers are not supposed to return other values! */
3537 if (net_ratelimit())
3538 pr_info("pktgen: %s xmit error: %d\n",
3539 pkt_dev->odevname, ret);
3540 pkt_dev->errors++;
3541 /* fallthru */
3542 case NETDEV_TX_LOCKED:
3543 case NETDEV_TX_BUSY:
3544 /* Retry it next time */
3545 atomic_dec(&(pkt_dev->skb->users));
3546 pkt_dev->last_ok = 0;
3547 }
3548 unlock:
3549 __netif_tx_unlock_bh(txq);
3550
3551 /* If pkt_dev->count is zero, then run forever */
3552 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3553 pktgen_wait_for_skb(pkt_dev);
3554
3555 /* Done with this */
3556 pktgen_stop_device(pkt_dev);
3557 }
3558 }
3559
3560 /*
3561 * Main loop of the thread goes here
3562 */
3563
3564 static int pktgen_thread_worker(void *arg)
3565 {
3566 DEFINE_WAIT(wait);
3567 struct pktgen_thread *t = arg;
3568 struct pktgen_dev *pkt_dev = NULL;
3569 int cpu = t->cpu;
3570
3571 BUG_ON(smp_processor_id() != cpu);
3572
3573 init_waitqueue_head(&t->queue);
3574 complete(&t->start_done);
3575
3576 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3577
3578 set_current_state(TASK_INTERRUPTIBLE);
3579
3580 set_freezable();
3581
3582 while (!kthread_should_stop()) {
3583 pkt_dev = next_to_run(t);
3584
3585 if (unlikely(!pkt_dev && t->control == 0)) {
3586 wait_event_interruptible_timeout(t->queue,
3587 t->control != 0,
3588 HZ/10);
3589 try_to_freeze();
3590 continue;
3591 }
3592
3593 __set_current_state(TASK_RUNNING);
3594
3595 if (likely(pkt_dev)) {
3596 pktgen_xmit(pkt_dev);
3597
3598 if (need_resched())
3599 pktgen_resched(pkt_dev);
3600 else
3601 cpu_relax();
3602 }
3603
3604 if (t->control & T_STOP) {
3605 pktgen_stop(t);
3606 t->control &= ~(T_STOP);
3607 }
3608
3609 if (t->control & T_RUN) {
3610 pktgen_run(t);
3611 t->control &= ~(T_RUN);
3612 }
3613
3614 if (t->control & T_REMDEVALL) {
3615 pktgen_rem_all_ifs(t);
3616 t->control &= ~(T_REMDEVALL);
3617 }
3618
3619 if (t->control & T_REMDEV) {
3620 pktgen_rem_one_if(t);
3621 t->control &= ~(T_REMDEV);
3622 }
3623
3624 try_to_freeze();
3625
3626 set_current_state(TASK_INTERRUPTIBLE);
3627 }
3628
3629 pr_debug("%s stopping all device\n", t->tsk->comm);
3630 pktgen_stop(t);
3631
3632 pr_debug("%s removing all device\n", t->tsk->comm);
3633 pktgen_rem_all_ifs(t);
3634
3635 pr_debug("%s removing thread\n", t->tsk->comm);
3636 pktgen_rem_thread(t);
3637
3638 return 0;
3639 }
3640
3641 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3642 const char *ifname, bool exact)
3643 {
3644 struct pktgen_dev *p, *pkt_dev = NULL;
3645 size_t len = strlen(ifname);
3646
3647 if_lock(t);
3648 list_for_each_entry(p, &t->if_list, list)
3649 if (strncmp(p->odevname, ifname, len) == 0) {
3650 if (p->odevname[len]) {
3651 if (exact || p->odevname[len] != '@')
3652 continue;
3653 }
3654 pkt_dev = p;
3655 break;
3656 }
3657
3658 if_unlock(t);
3659 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3660 return pkt_dev;
3661 }
3662
3663 /*
3664 * Adds a dev at front of if_list.
3665 */
3666
3667 static int add_dev_to_thread(struct pktgen_thread *t,
3668 struct pktgen_dev *pkt_dev)
3669 {
3670 int rv = 0;
3671
3672 if_lock(t);
3673
3674 if (pkt_dev->pg_thread) {
3675 pr_err("ERROR: already assigned to a thread\n");
3676 rv = -EBUSY;
3677 goto out;
3678 }
3679
3680 list_add(&pkt_dev->list, &t->if_list);
3681 pkt_dev->pg_thread = t;
3682 pkt_dev->running = 0;
3683
3684 out:
3685 if_unlock(t);
3686 return rv;
3687 }
3688
3689 /* Called under thread lock */
3690
3691 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3692 {
3693 struct pktgen_dev *pkt_dev;
3694 int err;
3695 int node = cpu_to_node(t->cpu);
3696
3697 /* We don't allow a device to be on several threads */
3698
3699 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3700 if (pkt_dev) {
3701 pr_err("ERROR: interface already used\n");
3702 return -EBUSY;
3703 }
3704
3705 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3706 if (!pkt_dev)
3707 return -ENOMEM;
3708
3709 strcpy(pkt_dev->odevname, ifname);
3710 pkt_dev->flows = vmalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3711 node);
3712 if (pkt_dev->flows == NULL) {
3713 kfree(pkt_dev);
3714 return -ENOMEM;
3715 }
3716 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3717
3718 pkt_dev->removal_mark = 0;
3719 pkt_dev->min_pkt_size = ETH_ZLEN;
3720 pkt_dev->max_pkt_size = ETH_ZLEN;
3721 pkt_dev->nfrags = 0;
3722 pkt_dev->clone_skb = pg_clone_skb_d;
3723 pkt_dev->delay = pg_delay_d;
3724 pkt_dev->count = pg_count_d;
3725 pkt_dev->sofar = 0;
3726 pkt_dev->udp_src_min = 9; /* sink port */
3727 pkt_dev->udp_src_max = 9;
3728 pkt_dev->udp_dst_min = 9;
3729 pkt_dev->udp_dst_max = 9;
3730
3731 pkt_dev->vlan_p = 0;
3732 pkt_dev->vlan_cfi = 0;
3733 pkt_dev->vlan_id = 0xffff;
3734 pkt_dev->svlan_p = 0;
3735 pkt_dev->svlan_cfi = 0;
3736 pkt_dev->svlan_id = 0xffff;
3737 pkt_dev->node = -1;
3738
3739 err = pktgen_setup_dev(pkt_dev, ifname);
3740 if (err)
3741 goto out1;
3742
3743 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3744 &pktgen_if_fops, pkt_dev);
3745 if (!pkt_dev->entry) {
3746 pr_err("cannot create %s/%s procfs entry\n",
3747 PG_PROC_DIR, ifname);
3748 err = -EINVAL;
3749 goto out2;
3750 }
3751 #ifdef CONFIG_XFRM
3752 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3753 pkt_dev->ipsproto = IPPROTO_ESP;
3754 #endif
3755
3756 return add_dev_to_thread(t, pkt_dev);
3757 out2:
3758 dev_put(pkt_dev->odev);
3759 out1:
3760 #ifdef CONFIG_XFRM
3761 free_SAs(pkt_dev);
3762 #endif
3763 vfree(pkt_dev->flows);
3764 kfree(pkt_dev);
3765 return err;
3766 }
3767
3768 static int __init pktgen_create_thread(int cpu)
3769 {
3770 struct pktgen_thread *t;
3771 struct proc_dir_entry *pe;
3772 struct task_struct *p;
3773
3774 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3775 cpu_to_node(cpu));
3776 if (!t) {
3777 pr_err("ERROR: out of memory, can't create new thread\n");
3778 return -ENOMEM;
3779 }
3780
3781 spin_lock_init(&t->if_lock);
3782 t->cpu = cpu;
3783
3784 INIT_LIST_HEAD(&t->if_list);
3785
3786 list_add_tail(&t->th_list, &pktgen_threads);
3787 init_completion(&t->start_done);
3788
3789 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu);
3790 if (IS_ERR(p)) {
3791 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3792 list_del(&t->th_list);
3793 kfree(t);
3794 return PTR_ERR(p);
3795 }
3796 kthread_bind(p, cpu);
3797 t->tsk = p;
3798
3799 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3800 &pktgen_thread_fops, t);
3801 if (!pe) {
3802 pr_err("cannot create %s/%s procfs entry\n",
3803 PG_PROC_DIR, t->tsk->comm);
3804 kthread_stop(p);
3805 list_del(&t->th_list);
3806 kfree(t);
3807 return -EINVAL;
3808 }
3809
3810 wake_up_process(p);
3811 wait_for_completion(&t->start_done);
3812
3813 return 0;
3814 }
3815
3816 /*
3817 * Removes a device from the thread if_list.
3818 */
3819 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3820 struct pktgen_dev *pkt_dev)
3821 {
3822 struct list_head *q, *n;
3823 struct pktgen_dev *p;
3824
3825 list_for_each_safe(q, n, &t->if_list) {
3826 p = list_entry(q, struct pktgen_dev, list);
3827 if (p == pkt_dev)
3828 list_del(&p->list);
3829 }
3830 }
3831
3832 static int pktgen_remove_device(struct pktgen_thread *t,
3833 struct pktgen_dev *pkt_dev)
3834 {
3835
3836 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3837
3838 if (pkt_dev->running) {
3839 pr_warning("WARNING: trying to remove a running interface, stopping it now\n");
3840 pktgen_stop_device(pkt_dev);
3841 }
3842
3843 /* Dis-associate from the interface */
3844
3845 if (pkt_dev->odev) {
3846 dev_put(pkt_dev->odev);
3847 pkt_dev->odev = NULL;
3848 }
3849
3850 /* And update the thread if_list */
3851
3852 _rem_dev_from_if_list(t, pkt_dev);
3853
3854 if (pkt_dev->entry)
3855 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3856
3857 #ifdef CONFIG_XFRM
3858 free_SAs(pkt_dev);
3859 #endif
3860 vfree(pkt_dev->flows);
3861 kfree(pkt_dev);
3862 return 0;
3863 }
3864
3865 static int __init pg_init(void)
3866 {
3867 int cpu;
3868 struct proc_dir_entry *pe;
3869
3870 pr_info("%s", version);
3871
3872 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3873 if (!pg_proc_dir)
3874 return -ENODEV;
3875
3876 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3877 if (pe == NULL) {
3878 pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL);
3879 proc_net_remove(&init_net, PG_PROC_DIR);
3880 return -EINVAL;
3881 }
3882
3883 /* Register us to receive netdevice events */
3884 register_netdevice_notifier(&pktgen_notifier_block);
3885
3886 for_each_online_cpu(cpu) {
3887 int err;
3888
3889 err = pktgen_create_thread(cpu);
3890 if (err)
3891 pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n",
3892 cpu, err);
3893 }
3894
3895 if (list_empty(&pktgen_threads)) {
3896 pr_err("ERROR: Initialization failed for all threads\n");
3897 unregister_netdevice_notifier(&pktgen_notifier_block);
3898 remove_proc_entry(PGCTRL, pg_proc_dir);
3899 proc_net_remove(&init_net, PG_PROC_DIR);
3900 return -ENODEV;
3901 }
3902
3903 return 0;
3904 }
3905
3906 static void __exit pg_cleanup(void)
3907 {
3908 struct pktgen_thread *t;
3909 struct list_head *q, *n;
3910 wait_queue_head_t queue;
3911 init_waitqueue_head(&queue);
3912
3913 /* Stop all interfaces & threads */
3914
3915 list_for_each_safe(q, n, &pktgen_threads) {
3916 t = list_entry(q, struct pktgen_thread, th_list);
3917 kthread_stop(t->tsk);
3918 kfree(t);
3919 }
3920
3921 /* Un-register us from receiving netdevice events */
3922 unregister_netdevice_notifier(&pktgen_notifier_block);
3923
3924 /* Clean up proc file system */
3925 remove_proc_entry(PGCTRL, pg_proc_dir);
3926 proc_net_remove(&init_net, PG_PROC_DIR);
3927 }
3928
3929 module_init(pg_init);
3930 module_exit(pg_cleanup);
3931
3932 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3933 MODULE_DESCRIPTION("Packet Generator tool");
3934 MODULE_LICENSE("GPL");
3935 MODULE_VERSION(VERSION);
3936 module_param(pg_count_d, int, 0);
3937 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3938 module_param(pg_delay_d, int, 0);
3939 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3940 module_param(pg_clone_skb_d, int, 0);
3941 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3942 module_param(debug, int, 0);
3943 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree