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Staging: rtl8192e: use DEFINE_PCI_DEVICE_TABLE
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / core / pktgen.c
blob33bc3823ac6fce64b227fafe670f2b12e3816a86
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 int value;
733 char c;
734 *num <<= 4;
735 if (get_user(c, &user_buffer[i]))
736 return -EFAULT;
737 value = hex_to_bin(c);
738 if (value >= 0)
739 *num |= value;
740 else
741 break;
742 }
743 return i;
744 }
745
746 static int count_trail_chars(const char __user * user_buffer,
747 unsigned int maxlen)
748 {
749 int i;
750
751 for (i = 0; i < maxlen; i++) {
752 char c;
753 if (get_user(c, &user_buffer[i]))
754 return -EFAULT;
755 switch (c) {
756 case '\"':
757 case '\n':
758 case '\r':
759 case '\t':
760 case ' ':
761 case '=':
762 break;
763 default:
764 goto done;
765 }
766 }
767 done:
768 return i;
769 }
770
771 static unsigned long num_arg(const char __user * user_buffer,
772 unsigned long maxlen, unsigned long *num)
773 {
774 int i;
775 *num = 0;
776
777 for (i = 0; i < maxlen; i++) {
778 char c;
779 if (get_user(c, &user_buffer[i]))
780 return -EFAULT;
781 if ((c >= '0') && (c <= '9')) {
782 *num *= 10;
783 *num += c - '0';
784 } else
785 break;
786 }
787 return i;
788 }
789
790 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
791 {
792 int i;
793
794 for (i = 0; i < maxlen; i++) {
795 char c;
796 if (get_user(c, &user_buffer[i]))
797 return -EFAULT;
798 switch (c) {
799 case '\"':
800 case '\n':
801 case '\r':
802 case '\t':
803 case ' ':
804 goto done_str;
805 break;
806 default:
807 break;
808 }
809 }
810 done_str:
811 return i;
812 }
813
814 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
815 {
816 unsigned n = 0;
817 char c;
818 ssize_t i = 0;
819 int len;
820
821 pkt_dev->nr_labels = 0;
822 do {
823 __u32 tmp;
824 len = hex32_arg(&buffer[i], 8, &tmp);
825 if (len <= 0)
826 return len;
827 pkt_dev->labels[n] = htonl(tmp);
828 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
829 pkt_dev->flags |= F_MPLS_RND;
830 i += len;
831 if (get_user(c, &buffer[i]))
832 return -EFAULT;
833 i++;
834 n++;
835 if (n >= MAX_MPLS_LABELS)
836 return -E2BIG;
837 } while (c == ',');
838
839 pkt_dev->nr_labels = n;
840 return i;
841 }
842
843 static ssize_t pktgen_if_write(struct file *file,
844 const char __user * user_buffer, size_t count,
845 loff_t * offset)
846 {
847 struct seq_file *seq = file->private_data;
848 struct pktgen_dev *pkt_dev = seq->private;
849 int i, max, len;
850 char name[16], valstr[32];
851 unsigned long value = 0;
852 char *pg_result = NULL;
853 int tmp = 0;
854 char buf[128];
855
856 pg_result = &(pkt_dev->result[0]);
857
858 if (count < 1) {
859 pr_warning("wrong command format\n");
860 return -EINVAL;
861 }
862
863 max = count;
864 tmp = count_trail_chars(user_buffer, max);
865 if (tmp < 0) {
866 pr_warning("illegal format\n");
867 return tmp;
868 }
869 i = tmp;
870
871 /* Read variable name */
872
873 len = strn_len(&user_buffer[i], sizeof(name) - 1);
874 if (len < 0)
875 return len;
876
877 memset(name, 0, sizeof(name));
878 if (copy_from_user(name, &user_buffer[i], len))
879 return -EFAULT;
880 i += len;
881
882 max = count - i;
883 len = count_trail_chars(&user_buffer[i], max);
884 if (len < 0)
885 return len;
886
887 i += len;
888
889 if (debug) {
890 size_t copy = min_t(size_t, count, 1023);
891 char tb[copy + 1];
892 if (copy_from_user(tb, user_buffer, copy))
893 return -EFAULT;
894 tb[copy] = 0;
895 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name,
896 (unsigned long)count, tb);
897 }
898
899 if (!strcmp(name, "min_pkt_size")) {
900 len = num_arg(&user_buffer[i], 10, &value);
901 if (len < 0)
902 return len;
903
904 i += len;
905 if (value < 14 + 20 + 8)
906 value = 14 + 20 + 8;
907 if (value != pkt_dev->min_pkt_size) {
908 pkt_dev->min_pkt_size = value;
909 pkt_dev->cur_pkt_size = value;
910 }
911 sprintf(pg_result, "OK: min_pkt_size=%u",
912 pkt_dev->min_pkt_size);
913 return count;
914 }
915
916 if (!strcmp(name, "max_pkt_size")) {
917 len = num_arg(&user_buffer[i], 10, &value);
918 if (len < 0)
919 return len;
920
921 i += len;
922 if (value < 14 + 20 + 8)
923 value = 14 + 20 + 8;
924 if (value != pkt_dev->max_pkt_size) {
925 pkt_dev->max_pkt_size = value;
926 pkt_dev->cur_pkt_size = value;
927 }
928 sprintf(pg_result, "OK: max_pkt_size=%u",
929 pkt_dev->max_pkt_size);
930 return count;
931 }
932
933 /* Shortcut for min = max */
934
935 if (!strcmp(name, "pkt_size")) {
936 len = num_arg(&user_buffer[i], 10, &value);
937 if (len < 0)
938 return len;
939
940 i += len;
941 if (value < 14 + 20 + 8)
942 value = 14 + 20 + 8;
943 if (value != pkt_dev->min_pkt_size) {
944 pkt_dev->min_pkt_size = value;
945 pkt_dev->max_pkt_size = value;
946 pkt_dev->cur_pkt_size = value;
947 }
948 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
949 return count;
950 }
951
952 if (!strcmp(name, "debug")) {
953 len = num_arg(&user_buffer[i], 10, &value);
954 if (len < 0)
955 return len;
956
957 i += len;
958 debug = value;
959 sprintf(pg_result, "OK: debug=%u", debug);
960 return count;
961 }
962
963 if (!strcmp(name, "frags")) {
964 len = num_arg(&user_buffer[i], 10, &value);
965 if (len < 0)
966 return len;
967
968 i += len;
969 pkt_dev->nfrags = value;
970 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
971 return count;
972 }
973 if (!strcmp(name, "delay")) {
974 len = num_arg(&user_buffer[i], 10, &value);
975 if (len < 0)
976 return len;
977
978 i += len;
979 if (value == 0x7FFFFFFF)
980 pkt_dev->delay = ULLONG_MAX;
981 else
982 pkt_dev->delay = (u64)value;
983
984 sprintf(pg_result, "OK: delay=%llu",
985 (unsigned long long) pkt_dev->delay);
986 return count;
987 }
988 if (!strcmp(name, "rate")) {
989 len = num_arg(&user_buffer[i], 10, &value);
990 if (len < 0)
991 return len;
992
993 i += len;
994 if (!value)
995 return len;
996 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
997 if (debug)
998 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
999
1000 sprintf(pg_result, "OK: rate=%lu", value);
1001 return count;
1002 }
1003 if (!strcmp(name, "ratep")) {
1004 len = num_arg(&user_buffer[i], 10, &value);
1005 if (len < 0)
1006 return len;
1007
1008 i += len;
1009 if (!value)
1010 return len;
1011 pkt_dev->delay = NSEC_PER_SEC/value;
1012 if (debug)
1013 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1014
1015 sprintf(pg_result, "OK: rate=%lu", value);
1016 return count;
1017 }
1018 if (!strcmp(name, "udp_src_min")) {
1019 len = num_arg(&user_buffer[i], 10, &value);
1020 if (len < 0)
1021 return len;
1022
1023 i += len;
1024 if (value != pkt_dev->udp_src_min) {
1025 pkt_dev->udp_src_min = value;
1026 pkt_dev->cur_udp_src = value;
1027 }
1028 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1029 return count;
1030 }
1031 if (!strcmp(name, "udp_dst_min")) {
1032 len = num_arg(&user_buffer[i], 10, &value);
1033 if (len < 0)
1034 return len;
1035
1036 i += len;
1037 if (value != pkt_dev->udp_dst_min) {
1038 pkt_dev->udp_dst_min = value;
1039 pkt_dev->cur_udp_dst = value;
1040 }
1041 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1042 return count;
1043 }
1044 if (!strcmp(name, "udp_src_max")) {
1045 len = num_arg(&user_buffer[i], 10, &value);
1046 if (len < 0)
1047 return len;
1048
1049 i += len;
1050 if (value != pkt_dev->udp_src_max) {
1051 pkt_dev->udp_src_max = value;
1052 pkt_dev->cur_udp_src = value;
1053 }
1054 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1055 return count;
1056 }
1057 if (!strcmp(name, "udp_dst_max")) {
1058 len = num_arg(&user_buffer[i], 10, &value);
1059 if (len < 0)
1060 return len;
1061
1062 i += len;
1063 if (value != pkt_dev->udp_dst_max) {
1064 pkt_dev->udp_dst_max = value;
1065 pkt_dev->cur_udp_dst = value;
1066 }
1067 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1068 return count;
1069 }
1070 if (!strcmp(name, "clone_skb")) {
1071 len = num_arg(&user_buffer[i], 10, &value);
1072 if (len < 0)
1073 return len;
1074
1075 i += len;
1076 pkt_dev->clone_skb = value;
1077
1078 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1079 return count;
1080 }
1081 if (!strcmp(name, "count")) {
1082 len = num_arg(&user_buffer[i], 10, &value);
1083 if (len < 0)
1084 return len;
1085
1086 i += len;
1087 pkt_dev->count = value;
1088 sprintf(pg_result, "OK: count=%llu",
1089 (unsigned long long)pkt_dev->count);
1090 return count;
1091 }
1092 if (!strcmp(name, "src_mac_count")) {
1093 len = num_arg(&user_buffer[i], 10, &value);
1094 if (len < 0)
1095 return len;
1096
1097 i += len;
1098 if (pkt_dev->src_mac_count != value) {
1099 pkt_dev->src_mac_count = value;
1100 pkt_dev->cur_src_mac_offset = 0;
1101 }
1102 sprintf(pg_result, "OK: src_mac_count=%d",
1103 pkt_dev->src_mac_count);
1104 return count;
1105 }
1106 if (!strcmp(name, "dst_mac_count")) {
1107 len = num_arg(&user_buffer[i], 10, &value);
1108 if (len < 0)
1109 return len;
1110
1111 i += len;
1112 if (pkt_dev->dst_mac_count != value) {
1113 pkt_dev->dst_mac_count = value;
1114 pkt_dev->cur_dst_mac_offset = 0;
1115 }
1116 sprintf(pg_result, "OK: dst_mac_count=%d",
1117 pkt_dev->dst_mac_count);
1118 return count;
1119 }
1120 if (!strcmp(name, "node")) {
1121 len = num_arg(&user_buffer[i], 10, &value);
1122 if (len < 0)
1123 return len;
1124
1125 i += len;
1126
1127 if (node_possible(value)) {
1128 pkt_dev->node = value;
1129 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1130 }
1131 else
1132 sprintf(pg_result, "ERROR: node not possible");
1133 return count;
1134 }
1135 if (!strcmp(name, "flag")) {
1136 char f[32];
1137 memset(f, 0, 32);
1138 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1139 if (len < 0)
1140 return len;
1141
1142 if (copy_from_user(f, &user_buffer[i], len))
1143 return -EFAULT;
1144 i += len;
1145 if (strcmp(f, "IPSRC_RND") == 0)
1146 pkt_dev->flags |= F_IPSRC_RND;
1147
1148 else if (strcmp(f, "!IPSRC_RND") == 0)
1149 pkt_dev->flags &= ~F_IPSRC_RND;
1150
1151 else if (strcmp(f, "TXSIZE_RND") == 0)
1152 pkt_dev->flags |= F_TXSIZE_RND;
1153
1154 else if (strcmp(f, "!TXSIZE_RND") == 0)
1155 pkt_dev->flags &= ~F_TXSIZE_RND;
1156
1157 else if (strcmp(f, "IPDST_RND") == 0)
1158 pkt_dev->flags |= F_IPDST_RND;
1159
1160 else if (strcmp(f, "!IPDST_RND") == 0)
1161 pkt_dev->flags &= ~F_IPDST_RND;
1162
1163 else if (strcmp(f, "UDPSRC_RND") == 0)
1164 pkt_dev->flags |= F_UDPSRC_RND;
1165
1166 else if (strcmp(f, "!UDPSRC_RND") == 0)
1167 pkt_dev->flags &= ~F_UDPSRC_RND;
1168
1169 else if (strcmp(f, "UDPDST_RND") == 0)
1170 pkt_dev->flags |= F_UDPDST_RND;
1171
1172 else if (strcmp(f, "!UDPDST_RND") == 0)
1173 pkt_dev->flags &= ~F_UDPDST_RND;
1174
1175 else if (strcmp(f, "MACSRC_RND") == 0)
1176 pkt_dev->flags |= F_MACSRC_RND;
1177
1178 else if (strcmp(f, "!MACSRC_RND") == 0)
1179 pkt_dev->flags &= ~F_MACSRC_RND;
1180
1181 else if (strcmp(f, "MACDST_RND") == 0)
1182 pkt_dev->flags |= F_MACDST_RND;
1183
1184 else if (strcmp(f, "!MACDST_RND") == 0)
1185 pkt_dev->flags &= ~F_MACDST_RND;
1186
1187 else if (strcmp(f, "MPLS_RND") == 0)
1188 pkt_dev->flags |= F_MPLS_RND;
1189
1190 else if (strcmp(f, "!MPLS_RND") == 0)
1191 pkt_dev->flags &= ~F_MPLS_RND;
1192
1193 else if (strcmp(f, "VID_RND") == 0)
1194 pkt_dev->flags |= F_VID_RND;
1195
1196 else if (strcmp(f, "!VID_RND") == 0)
1197 pkt_dev->flags &= ~F_VID_RND;
1198
1199 else if (strcmp(f, "SVID_RND") == 0)
1200 pkt_dev->flags |= F_SVID_RND;
1201
1202 else if (strcmp(f, "!SVID_RND") == 0)
1203 pkt_dev->flags &= ~F_SVID_RND;
1204
1205 else if (strcmp(f, "FLOW_SEQ") == 0)
1206 pkt_dev->flags |= F_FLOW_SEQ;
1207
1208 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1209 pkt_dev->flags |= F_QUEUE_MAP_RND;
1210
1211 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1212 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1213
1214 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1215 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1216
1217 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1218 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1219 #ifdef CONFIG_XFRM
1220 else if (strcmp(f, "IPSEC") == 0)
1221 pkt_dev->flags |= F_IPSEC_ON;
1222 #endif
1223
1224 else if (strcmp(f, "!IPV6") == 0)
1225 pkt_dev->flags &= ~F_IPV6;
1226
1227 else if (strcmp(f, "NODE_ALLOC") == 0)
1228 pkt_dev->flags |= F_NODE;
1229
1230 else if (strcmp(f, "!NODE_ALLOC") == 0)
1231 pkt_dev->flags &= ~F_NODE;
1232
1233 else {
1234 sprintf(pg_result,
1235 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1236 f,
1237 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1238 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n");
1239 return count;
1240 }
1241 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1242 return count;
1243 }
1244 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1245 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1246 if (len < 0)
1247 return len;
1248
1249 if (copy_from_user(buf, &user_buffer[i], len))
1250 return -EFAULT;
1251 buf[len] = 0;
1252 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1253 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1254 strncpy(pkt_dev->dst_min, buf, len);
1255 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1256 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1257 }
1258 if (debug)
1259 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1260 pkt_dev->dst_min);
1261 i += len;
1262 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1263 return count;
1264 }
1265 if (!strcmp(name, "dst_max")) {
1266 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1267 if (len < 0)
1268 return len;
1269
1270
1271 if (copy_from_user(buf, &user_buffer[i], len))
1272 return -EFAULT;
1273
1274 buf[len] = 0;
1275 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1276 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1277 strncpy(pkt_dev->dst_max, buf, len);
1278 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1279 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1280 }
1281 if (debug)
1282 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1283 pkt_dev->dst_max);
1284 i += len;
1285 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1286 return count;
1287 }
1288 if (!strcmp(name, "dst6")) {
1289 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1290 if (len < 0)
1291 return len;
1292
1293 pkt_dev->flags |= F_IPV6;
1294
1295 if (copy_from_user(buf, &user_buffer[i], len))
1296 return -EFAULT;
1297 buf[len] = 0;
1298
1299 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1300 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1301
1302 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1303
1304 if (debug)
1305 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1306
1307 i += len;
1308 sprintf(pg_result, "OK: dst6=%s", buf);
1309 return count;
1310 }
1311 if (!strcmp(name, "dst6_min")) {
1312 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1313 if (len < 0)
1314 return len;
1315
1316 pkt_dev->flags |= F_IPV6;
1317
1318 if (copy_from_user(buf, &user_buffer[i], len))
1319 return -EFAULT;
1320 buf[len] = 0;
1321
1322 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1323 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1324
1325 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1326 &pkt_dev->min_in6_daddr);
1327 if (debug)
1328 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1329
1330 i += len;
1331 sprintf(pg_result, "OK: dst6_min=%s", buf);
1332 return count;
1333 }
1334 if (!strcmp(name, "dst6_max")) {
1335 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1336 if (len < 0)
1337 return len;
1338
1339 pkt_dev->flags |= F_IPV6;
1340
1341 if (copy_from_user(buf, &user_buffer[i], len))
1342 return -EFAULT;
1343 buf[len] = 0;
1344
1345 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1346 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1347
1348 if (debug)
1349 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1350
1351 i += len;
1352 sprintf(pg_result, "OK: dst6_max=%s", buf);
1353 return count;
1354 }
1355 if (!strcmp(name, "src6")) {
1356 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1357 if (len < 0)
1358 return len;
1359
1360 pkt_dev->flags |= F_IPV6;
1361
1362 if (copy_from_user(buf, &user_buffer[i], len))
1363 return -EFAULT;
1364 buf[len] = 0;
1365
1366 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1367 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1368
1369 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1370
1371 if (debug)
1372 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1373
1374 i += len;
1375 sprintf(pg_result, "OK: src6=%s", buf);
1376 return count;
1377 }
1378 if (!strcmp(name, "src_min")) {
1379 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1380 if (len < 0)
1381 return len;
1382
1383 if (copy_from_user(buf, &user_buffer[i], len))
1384 return -EFAULT;
1385 buf[len] = 0;
1386 if (strcmp(buf, pkt_dev->src_min) != 0) {
1387 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1388 strncpy(pkt_dev->src_min, buf, len);
1389 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1390 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1391 }
1392 if (debug)
1393 printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1394 pkt_dev->src_min);
1395 i += len;
1396 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1397 return count;
1398 }
1399 if (!strcmp(name, "src_max")) {
1400 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1401 if (len < 0)
1402 return len;
1403
1404 if (copy_from_user(buf, &user_buffer[i], len))
1405 return -EFAULT;
1406 buf[len] = 0;
1407 if (strcmp(buf, pkt_dev->src_max) != 0) {
1408 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1409 strncpy(pkt_dev->src_max, buf, len);
1410 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1411 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1412 }
1413 if (debug)
1414 printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1415 pkt_dev->src_max);
1416 i += len;
1417 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1418 return count;
1419 }
1420 if (!strcmp(name, "dst_mac")) {
1421 char *v = valstr;
1422 unsigned char old_dmac[ETH_ALEN];
1423 unsigned char *m = pkt_dev->dst_mac;
1424 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1425
1426 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1427 if (len < 0)
1428 return len;
1429
1430 memset(valstr, 0, sizeof(valstr));
1431 if (copy_from_user(valstr, &user_buffer[i], len))
1432 return -EFAULT;
1433 i += len;
1434
1435 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1436 int value;
1437
1438 value = hex_to_bin(*v);
1439 if (value >= 0)
1440 *m = *m * 16 + value;
1441
1442 if (*v == ':') {
1443 m++;
1444 *m = 0;
1445 }
1446 }
1447
1448 /* Set up Dest MAC */
1449 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1450 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1451
1452 sprintf(pg_result, "OK: dstmac");
1453 return count;
1454 }
1455 if (!strcmp(name, "src_mac")) {
1456 char *v = valstr;
1457 unsigned char old_smac[ETH_ALEN];
1458 unsigned char *m = pkt_dev->src_mac;
1459
1460 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN);
1461
1462 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1463 if (len < 0)
1464 return len;
1465
1466 memset(valstr, 0, sizeof(valstr));
1467 if (copy_from_user(valstr, &user_buffer[i], len))
1468 return -EFAULT;
1469 i += len;
1470
1471 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1472 int value;
1473
1474 value = hex_to_bin(*v);
1475 if (value >= 0)
1476 *m = *m * 16 + value;
1477
1478 if (*v == ':') {
1479 m++;
1480 *m = 0;
1481 }
1482 }
1483
1484 /* Set up Src MAC */
1485 if (compare_ether_addr(old_smac, pkt_dev->src_mac))
1486 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN);
1487
1488 sprintf(pg_result, "OK: srcmac");
1489 return count;
1490 }
1491
1492 if (!strcmp(name, "clear_counters")) {
1493 pktgen_clear_counters(pkt_dev);
1494 sprintf(pg_result, "OK: Clearing counters.\n");
1495 return count;
1496 }
1497
1498 if (!strcmp(name, "flows")) {
1499 len = num_arg(&user_buffer[i], 10, &value);
1500 if (len < 0)
1501 return len;
1502
1503 i += len;
1504 if (value > MAX_CFLOWS)
1505 value = MAX_CFLOWS;
1506
1507 pkt_dev->cflows = value;
1508 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1509 return count;
1510 }
1511
1512 if (!strcmp(name, "flowlen")) {
1513 len = num_arg(&user_buffer[i], 10, &value);
1514 if (len < 0)
1515 return len;
1516
1517 i += len;
1518 pkt_dev->lflow = value;
1519 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1520 return count;
1521 }
1522
1523 if (!strcmp(name, "queue_map_min")) {
1524 len = num_arg(&user_buffer[i], 5, &value);
1525 if (len < 0)
1526 return len;
1527
1528 i += len;
1529 pkt_dev->queue_map_min = value;
1530 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1531 return count;
1532 }
1533
1534 if (!strcmp(name, "queue_map_max")) {
1535 len = num_arg(&user_buffer[i], 5, &value);
1536 if (len < 0)
1537 return len;
1538
1539 i += len;
1540 pkt_dev->queue_map_max = value;
1541 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1542 return count;
1543 }
1544
1545 if (!strcmp(name, "mpls")) {
1546 unsigned n, cnt;
1547
1548 len = get_labels(&user_buffer[i], pkt_dev);
1549 if (len < 0)
1550 return len;
1551 i += len;
1552 cnt = sprintf(pg_result, "OK: mpls=");
1553 for (n = 0; n < pkt_dev->nr_labels; n++)
1554 cnt += sprintf(pg_result + cnt,
1555 "%08x%s", ntohl(pkt_dev->labels[n]),
1556 n == pkt_dev->nr_labels-1 ? "" : ",");
1557
1558 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1559 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1560 pkt_dev->svlan_id = 0xffff;
1561
1562 if (debug)
1563 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1564 }
1565 return count;
1566 }
1567
1568 if (!strcmp(name, "vlan_id")) {
1569 len = num_arg(&user_buffer[i], 4, &value);
1570 if (len < 0)
1571 return len;
1572
1573 i += len;
1574 if (value <= 4095) {
1575 pkt_dev->vlan_id = value; /* turn on VLAN */
1576
1577 if (debug)
1578 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1579
1580 if (debug && pkt_dev->nr_labels)
1581 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1582
1583 pkt_dev->nr_labels = 0; /* turn off MPLS */
1584 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1585 } else {
1586 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1587 pkt_dev->svlan_id = 0xffff;
1588
1589 if (debug)
1590 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1591 }
1592 return count;
1593 }
1594
1595 if (!strcmp(name, "vlan_p")) {
1596 len = num_arg(&user_buffer[i], 1, &value);
1597 if (len < 0)
1598 return len;
1599
1600 i += len;
1601 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1602 pkt_dev->vlan_p = value;
1603 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1604 } else {
1605 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1606 }
1607 return count;
1608 }
1609
1610 if (!strcmp(name, "vlan_cfi")) {
1611 len = num_arg(&user_buffer[i], 1, &value);
1612 if (len < 0)
1613 return len;
1614
1615 i += len;
1616 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1617 pkt_dev->vlan_cfi = value;
1618 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1619 } else {
1620 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1621 }
1622 return count;
1623 }
1624
1625 if (!strcmp(name, "svlan_id")) {
1626 len = num_arg(&user_buffer[i], 4, &value);
1627 if (len < 0)
1628 return len;
1629
1630 i += len;
1631 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1632 pkt_dev->svlan_id = value; /* turn on SVLAN */
1633
1634 if (debug)
1635 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1636
1637 if (debug && pkt_dev->nr_labels)
1638 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1639
1640 pkt_dev->nr_labels = 0; /* turn off MPLS */
1641 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1642 } else {
1643 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1644 pkt_dev->svlan_id = 0xffff;
1645
1646 if (debug)
1647 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1648 }
1649 return count;
1650 }
1651
1652 if (!strcmp(name, "svlan_p")) {
1653 len = num_arg(&user_buffer[i], 1, &value);
1654 if (len < 0)
1655 return len;
1656
1657 i += len;
1658 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1659 pkt_dev->svlan_p = value;
1660 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1661 } else {
1662 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1663 }
1664 return count;
1665 }
1666
1667 if (!strcmp(name, "svlan_cfi")) {
1668 len = num_arg(&user_buffer[i], 1, &value);
1669 if (len < 0)
1670 return len;
1671
1672 i += len;
1673 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1674 pkt_dev->svlan_cfi = value;
1675 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1676 } else {
1677 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1678 }
1679 return count;
1680 }
1681
1682 if (!strcmp(name, "tos")) {
1683 __u32 tmp_value = 0;
1684 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1685 if (len < 0)
1686 return len;
1687
1688 i += len;
1689 if (len == 2) {
1690 pkt_dev->tos = tmp_value;
1691 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1692 } else {
1693 sprintf(pg_result, "ERROR: tos must be 00-ff");
1694 }
1695 return count;
1696 }
1697
1698 if (!strcmp(name, "traffic_class")) {
1699 __u32 tmp_value = 0;
1700 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1701 if (len < 0)
1702 return len;
1703
1704 i += len;
1705 if (len == 2) {
1706 pkt_dev->traffic_class = tmp_value;
1707 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1708 } else {
1709 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1710 }
1711 return count;
1712 }
1713
1714 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1715 return -EINVAL;
1716 }
1717
1718 static int pktgen_if_open(struct inode *inode, struct file *file)
1719 {
1720 return single_open(file, pktgen_if_show, PDE(inode)->data);
1721 }
1722
1723 static const struct file_operations pktgen_if_fops = {
1724 .owner = THIS_MODULE,
1725 .open = pktgen_if_open,
1726 .read = seq_read,
1727 .llseek = seq_lseek,
1728 .write = pktgen_if_write,
1729 .release = single_release,
1730 };
1731
1732 static int pktgen_thread_show(struct seq_file *seq, void *v)
1733 {
1734 struct pktgen_thread *t = seq->private;
1735 const struct pktgen_dev *pkt_dev;
1736
1737 BUG_ON(!t);
1738
1739 seq_printf(seq, "Running: ");
1740
1741 if_lock(t);
1742 list_for_each_entry(pkt_dev, &t->if_list, list)
1743 if (pkt_dev->running)
1744 seq_printf(seq, "%s ", pkt_dev->odevname);
1745
1746 seq_printf(seq, "\nStopped: ");
1747
1748 list_for_each_entry(pkt_dev, &t->if_list, list)
1749 if (!pkt_dev->running)
1750 seq_printf(seq, "%s ", pkt_dev->odevname);
1751
1752 if (t->result[0])
1753 seq_printf(seq, "\nResult: %s\n", t->result);
1754 else
1755 seq_printf(seq, "\nResult: NA\n");
1756
1757 if_unlock(t);
1758
1759 return 0;
1760 }
1761
1762 static ssize_t pktgen_thread_write(struct file *file,
1763 const char __user * user_buffer,
1764 size_t count, loff_t * offset)
1765 {
1766 struct seq_file *seq = file->private_data;
1767 struct pktgen_thread *t = seq->private;
1768 int i, max, len, ret;
1769 char name[40];
1770 char *pg_result;
1771
1772 if (count < 1) {
1773 // sprintf(pg_result, "Wrong command format");
1774 return -EINVAL;
1775 }
1776
1777 max = count;
1778 len = count_trail_chars(user_buffer, max);
1779 if (len < 0)
1780 return len;
1781
1782 i = len;
1783
1784 /* Read variable name */
1785
1786 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1787 if (len < 0)
1788 return len;
1789
1790 memset(name, 0, sizeof(name));
1791 if (copy_from_user(name, &user_buffer[i], len))
1792 return -EFAULT;
1793 i += len;
1794
1795 max = count - i;
1796 len = count_trail_chars(&user_buffer[i], max);
1797 if (len < 0)
1798 return len;
1799
1800 i += len;
1801
1802 if (debug)
1803 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1804 name, (unsigned long)count);
1805
1806 if (!t) {
1807 pr_err("ERROR: No thread\n");
1808 ret = -EINVAL;
1809 goto out;
1810 }
1811
1812 pg_result = &(t->result[0]);
1813
1814 if (!strcmp(name, "add_device")) {
1815 char f[32];
1816 memset(f, 0, 32);
1817 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1818 if (len < 0) {
1819 ret = len;
1820 goto out;
1821 }
1822 if (copy_from_user(f, &user_buffer[i], len))
1823 return -EFAULT;
1824 i += len;
1825 mutex_lock(&pktgen_thread_lock);
1826 pktgen_add_device(t, f);
1827 mutex_unlock(&pktgen_thread_lock);
1828 ret = count;
1829 sprintf(pg_result, "OK: add_device=%s", f);
1830 goto out;
1831 }
1832
1833 if (!strcmp(name, "rem_device_all")) {
1834 mutex_lock(&pktgen_thread_lock);
1835 t->control |= T_REMDEVALL;
1836 mutex_unlock(&pktgen_thread_lock);
1837 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1838 ret = count;
1839 sprintf(pg_result, "OK: rem_device_all");
1840 goto out;
1841 }
1842
1843 if (!strcmp(name, "max_before_softirq")) {
1844 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1845 ret = count;
1846 goto out;
1847 }
1848
1849 ret = -EINVAL;
1850 out:
1851 return ret;
1852 }
1853
1854 static int pktgen_thread_open(struct inode *inode, struct file *file)
1855 {
1856 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1857 }
1858
1859 static const struct file_operations pktgen_thread_fops = {
1860 .owner = THIS_MODULE,
1861 .open = pktgen_thread_open,
1862 .read = seq_read,
1863 .llseek = seq_lseek,
1864 .write = pktgen_thread_write,
1865 .release = single_release,
1866 };
1867
1868 /* Think find or remove for NN */
1869 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1870 {
1871 struct pktgen_thread *t;
1872 struct pktgen_dev *pkt_dev = NULL;
1873 bool exact = (remove == FIND);
1874
1875 list_for_each_entry(t, &pktgen_threads, th_list) {
1876 pkt_dev = pktgen_find_dev(t, ifname, exact);
1877 if (pkt_dev) {
1878 if (remove) {
1879 if_lock(t);
1880 pkt_dev->removal_mark = 1;
1881 t->control |= T_REMDEV;
1882 if_unlock(t);
1883 }
1884 break;
1885 }
1886 }
1887 return pkt_dev;
1888 }
1889
1890 /*
1891 * mark a device for removal
1892 */
1893 static void pktgen_mark_device(const char *ifname)
1894 {
1895 struct pktgen_dev *pkt_dev = NULL;
1896 const int max_tries = 10, msec_per_try = 125;
1897 int i = 0;
1898
1899 mutex_lock(&pktgen_thread_lock);
1900 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1901
1902 while (1) {
1903
1904 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1905 if (pkt_dev == NULL)
1906 break; /* success */
1907
1908 mutex_unlock(&pktgen_thread_lock);
1909 pr_debug("%s: waiting for %s to disappear....\n",
1910 __func__, ifname);
1911 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1912 mutex_lock(&pktgen_thread_lock);
1913
1914 if (++i >= max_tries) {
1915 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1916 __func__, msec_per_try * i, ifname);
1917 break;
1918 }
1919
1920 }
1921
1922 mutex_unlock(&pktgen_thread_lock);
1923 }
1924
1925 static void pktgen_change_name(struct net_device *dev)
1926 {
1927 struct pktgen_thread *t;
1928
1929 list_for_each_entry(t, &pktgen_threads, th_list) {
1930 struct pktgen_dev *pkt_dev;
1931
1932 list_for_each_entry(pkt_dev, &t->if_list, list) {
1933 if (pkt_dev->odev != dev)
1934 continue;
1935
1936 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1937
1938 pkt_dev->entry = proc_create_data(dev->name, 0600,
1939 pg_proc_dir,
1940 &pktgen_if_fops,
1941 pkt_dev);
1942 if (!pkt_dev->entry)
1943 pr_err("can't move proc entry for '%s'\n",
1944 dev->name);
1945 break;
1946 }
1947 }
1948 }
1949
1950 static int pktgen_device_event(struct notifier_block *unused,
1951 unsigned long event, void *ptr)
1952 {
1953 struct net_device *dev = ptr;
1954
1955 if (!net_eq(dev_net(dev), &init_net))
1956 return NOTIFY_DONE;
1957
1958 /* It is OK that we do not hold the group lock right now,
1959 * as we run under the RTNL lock.
1960 */
1961
1962 switch (event) {
1963 case NETDEV_CHANGENAME:
1964 pktgen_change_name(dev);
1965 break;
1966
1967 case NETDEV_UNREGISTER:
1968 pktgen_mark_device(dev->name);
1969 break;
1970 }
1971
1972 return NOTIFY_DONE;
1973 }
1974
1975 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev,
1976 const char *ifname)
1977 {
1978 char b[IFNAMSIZ+5];
1979 int i;
1980
1981 for (i = 0; ifname[i] != '@'; i++) {
1982 if (i == IFNAMSIZ)
1983 break;
1984
1985 b[i] = ifname[i];
1986 }
1987 b[i] = 0;
1988
1989 return dev_get_by_name(&init_net, b);
1990 }
1991
1992
1993 /* Associate pktgen_dev with a device. */
1994
1995 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1996 {
1997 struct net_device *odev;
1998 int err;
1999
2000 /* Clean old setups */
2001 if (pkt_dev->odev) {
2002 dev_put(pkt_dev->odev);
2003 pkt_dev->odev = NULL;
2004 }
2005
2006 odev = pktgen_dev_get_by_name(pkt_dev, ifname);
2007 if (!odev) {
2008 pr_err("no such netdevice: \"%s\"\n", ifname);
2009 return -ENODEV;
2010 }
2011
2012 if (odev->type != ARPHRD_ETHER) {
2013 pr_err("not an ethernet device: \"%s\"\n", ifname);
2014 err = -EINVAL;
2015 } else if (!netif_running(odev)) {
2016 pr_err("device is down: \"%s\"\n", ifname);
2017 err = -ENETDOWN;
2018 } else {
2019 pkt_dev->odev = odev;
2020 return 0;
2021 }
2022
2023 dev_put(odev);
2024 return err;
2025 }
2026
2027 /* Read pkt_dev from the interface and set up internal pktgen_dev
2028 * structure to have the right information to create/send packets
2029 */
2030 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2031 {
2032 int ntxq;
2033
2034 if (!pkt_dev->odev) {
2035 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2036 sprintf(pkt_dev->result,
2037 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2038 return;
2039 }
2040
2041 /* make sure that we don't pick a non-existing transmit queue */
2042 ntxq = pkt_dev->odev->real_num_tx_queues;
2043
2044 if (ntxq <= pkt_dev->queue_map_min) {
2045 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2046 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2047 pkt_dev->odevname);
2048 pkt_dev->queue_map_min = ntxq - 1;
2049 }
2050 if (pkt_dev->queue_map_max >= ntxq) {
2051 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2052 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2053 pkt_dev->odevname);
2054 pkt_dev->queue_map_max = ntxq - 1;
2055 }
2056
2057 /* Default to the interface's mac if not explicitly set. */
2058
2059 if (is_zero_ether_addr(pkt_dev->src_mac))
2060 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2061
2062 /* Set up Dest MAC */
2063 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2064
2065 /* Set up pkt size */
2066 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2067
2068 if (pkt_dev->flags & F_IPV6) {
2069 /*
2070 * Skip this automatic address setting until locks or functions
2071 * gets exported
2072 */
2073
2074 #ifdef NOTNOW
2075 int i, set = 0, err = 1;
2076 struct inet6_dev *idev;
2077
2078 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2079 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2080 set = 1;
2081 break;
2082 }
2083
2084 if (!set) {
2085
2086 /*
2087 * Use linklevel address if unconfigured.
2088 *
2089 * use ipv6_get_lladdr if/when it's get exported
2090 */
2091
2092 rcu_read_lock();
2093 idev = __in6_dev_get(pkt_dev->odev);
2094 if (idev) {
2095 struct inet6_ifaddr *ifp;
2096
2097 read_lock_bh(&idev->lock);
2098 for (ifp = idev->addr_list; ifp;
2099 ifp = ifp->if_next) {
2100 if (ifp->scope == IFA_LINK &&
2101 !(ifp->flags & IFA_F_TENTATIVE)) {
2102 ipv6_addr_copy(&pkt_dev->
2103 cur_in6_saddr,
2104 &ifp->addr);
2105 err = 0;
2106 break;
2107 }
2108 }
2109 read_unlock_bh(&idev->lock);
2110 }
2111 rcu_read_unlock();
2112 if (err)
2113 pr_err("ERROR: IPv6 link address not available\n");
2114 }
2115 #endif
2116 } else {
2117 pkt_dev->saddr_min = 0;
2118 pkt_dev->saddr_max = 0;
2119 if (strlen(pkt_dev->src_min) == 0) {
2120
2121 struct in_device *in_dev;
2122
2123 rcu_read_lock();
2124 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2125 if (in_dev) {
2126 if (in_dev->ifa_list) {
2127 pkt_dev->saddr_min =
2128 in_dev->ifa_list->ifa_address;
2129 pkt_dev->saddr_max = pkt_dev->saddr_min;
2130 }
2131 }
2132 rcu_read_unlock();
2133 } else {
2134 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2135 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2136 }
2137
2138 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2139 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2140 }
2141 /* Initialize current values. */
2142 pkt_dev->cur_dst_mac_offset = 0;
2143 pkt_dev->cur_src_mac_offset = 0;
2144 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2145 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2146 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2147 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2148 pkt_dev->nflows = 0;
2149 }
2150
2151
2152 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2153 {
2154 ktime_t start_time, end_time;
2155 s64 remaining;
2156 struct hrtimer_sleeper t;
2157
2158 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2159 hrtimer_set_expires(&t.timer, spin_until);
2160
2161 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2162 if (remaining <= 0) {
2163 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2164 return;
2165 }
2166
2167 start_time = ktime_now();
2168 if (remaining < 100000)
2169 ndelay(remaining); /* really small just spin */
2170 else {
2171 /* see do_nanosleep */
2172 hrtimer_init_sleeper(&t, current);
2173 do {
2174 set_current_state(TASK_INTERRUPTIBLE);
2175 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2176 if (!hrtimer_active(&t.timer))
2177 t.task = NULL;
2178
2179 if (likely(t.task))
2180 schedule();
2181
2182 hrtimer_cancel(&t.timer);
2183 } while (t.task && pkt_dev->running && !signal_pending(current));
2184 __set_current_state(TASK_RUNNING);
2185 }
2186 end_time = ktime_now();
2187
2188 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2189 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2190 }
2191
2192 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2193 {
2194 pkt_dev->pkt_overhead = 0;
2195 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2196 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2197 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2198 }
2199
2200 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2201 {
2202 return !!(pkt_dev->flows[flow].flags & F_INIT);
2203 }
2204
2205 static inline int f_pick(struct pktgen_dev *pkt_dev)
2206 {
2207 int flow = pkt_dev->curfl;
2208
2209 if (pkt_dev->flags & F_FLOW_SEQ) {
2210 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2211 /* reset time */
2212 pkt_dev->flows[flow].count = 0;
2213 pkt_dev->flows[flow].flags = 0;
2214 pkt_dev->curfl += 1;
2215 if (pkt_dev->curfl >= pkt_dev->cflows)
2216 pkt_dev->curfl = 0; /*reset */
2217 }
2218 } else {
2219 flow = random32() % pkt_dev->cflows;
2220 pkt_dev->curfl = flow;
2221
2222 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2223 pkt_dev->flows[flow].count = 0;
2224 pkt_dev->flows[flow].flags = 0;
2225 }
2226 }
2227
2228 return pkt_dev->curfl;
2229 }
2230
2231
2232 #ifdef CONFIG_XFRM
2233 /* If there was already an IPSEC SA, we keep it as is, else
2234 * we go look for it ...
2235 */
2236 #define DUMMY_MARK 0
2237 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2238 {
2239 struct xfrm_state *x = pkt_dev->flows[flow].x;
2240 if (!x) {
2241 /*slow path: we dont already have xfrm_state*/
2242 x = xfrm_stateonly_find(&init_net, DUMMY_MARK,
2243 (xfrm_address_t *)&pkt_dev->cur_daddr,
2244 (xfrm_address_t *)&pkt_dev->cur_saddr,
2245 AF_INET,
2246 pkt_dev->ipsmode,
2247 pkt_dev->ipsproto, 0);
2248 if (x) {
2249 pkt_dev->flows[flow].x = x;
2250 set_pkt_overhead(pkt_dev);
2251 pkt_dev->pkt_overhead += x->props.header_len;
2252 }
2253
2254 }
2255 }
2256 #endif
2257 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2258 {
2259
2260 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2261 pkt_dev->cur_queue_map = smp_processor_id();
2262
2263 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2264 __u16 t;
2265 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2266 t = random32() %
2267 (pkt_dev->queue_map_max -
2268 pkt_dev->queue_map_min + 1)
2269 + pkt_dev->queue_map_min;
2270 } else {
2271 t = pkt_dev->cur_queue_map + 1;
2272 if (t > pkt_dev->queue_map_max)
2273 t = pkt_dev->queue_map_min;
2274 }
2275 pkt_dev->cur_queue_map = t;
2276 }
2277 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2278 }
2279
2280 /* Increment/randomize headers according to flags and current values
2281 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2282 */
2283 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2284 {
2285 __u32 imn;
2286 __u32 imx;
2287 int flow = 0;
2288
2289 if (pkt_dev->cflows)
2290 flow = f_pick(pkt_dev);
2291
2292 /* Deal with source MAC */
2293 if (pkt_dev->src_mac_count > 1) {
2294 __u32 mc;
2295 __u32 tmp;
2296
2297 if (pkt_dev->flags & F_MACSRC_RND)
2298 mc = random32() % pkt_dev->src_mac_count;
2299 else {
2300 mc = pkt_dev->cur_src_mac_offset++;
2301 if (pkt_dev->cur_src_mac_offset >=
2302 pkt_dev->src_mac_count)
2303 pkt_dev->cur_src_mac_offset = 0;
2304 }
2305
2306 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2307 pkt_dev->hh[11] = tmp;
2308 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2309 pkt_dev->hh[10] = tmp;
2310 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2311 pkt_dev->hh[9] = tmp;
2312 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2313 pkt_dev->hh[8] = tmp;
2314 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2315 pkt_dev->hh[7] = tmp;
2316 }
2317
2318 /* Deal with Destination MAC */
2319 if (pkt_dev->dst_mac_count > 1) {
2320 __u32 mc;
2321 __u32 tmp;
2322
2323 if (pkt_dev->flags & F_MACDST_RND)
2324 mc = random32() % pkt_dev->dst_mac_count;
2325
2326 else {
2327 mc = pkt_dev->cur_dst_mac_offset++;
2328 if (pkt_dev->cur_dst_mac_offset >=
2329 pkt_dev->dst_mac_count) {
2330 pkt_dev->cur_dst_mac_offset = 0;
2331 }
2332 }
2333
2334 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2335 pkt_dev->hh[5] = tmp;
2336 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2337 pkt_dev->hh[4] = tmp;
2338 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2339 pkt_dev->hh[3] = tmp;
2340 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2341 pkt_dev->hh[2] = tmp;
2342 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2343 pkt_dev->hh[1] = tmp;
2344 }
2345
2346 if (pkt_dev->flags & F_MPLS_RND) {
2347 unsigned i;
2348 for (i = 0; i < pkt_dev->nr_labels; i++)
2349 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2350 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2351 ((__force __be32)random32() &
2352 htonl(0x000fffff));
2353 }
2354
2355 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2356 pkt_dev->vlan_id = random32() & (4096-1);
2357 }
2358
2359 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2360 pkt_dev->svlan_id = random32() & (4096 - 1);
2361 }
2362
2363 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2364 if (pkt_dev->flags & F_UDPSRC_RND)
2365 pkt_dev->cur_udp_src = random32() %
2366 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2367 + pkt_dev->udp_src_min;
2368
2369 else {
2370 pkt_dev->cur_udp_src++;
2371 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2372 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2373 }
2374 }
2375
2376 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2377 if (pkt_dev->flags & F_UDPDST_RND) {
2378 pkt_dev->cur_udp_dst = random32() %
2379 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2380 + pkt_dev->udp_dst_min;
2381 } else {
2382 pkt_dev->cur_udp_dst++;
2383 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2384 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2385 }
2386 }
2387
2388 if (!(pkt_dev->flags & F_IPV6)) {
2389
2390 imn = ntohl(pkt_dev->saddr_min);
2391 imx = ntohl(pkt_dev->saddr_max);
2392 if (imn < imx) {
2393 __u32 t;
2394 if (pkt_dev->flags & F_IPSRC_RND)
2395 t = random32() % (imx - imn) + imn;
2396 else {
2397 t = ntohl(pkt_dev->cur_saddr);
2398 t++;
2399 if (t > imx)
2400 t = imn;
2401
2402 }
2403 pkt_dev->cur_saddr = htonl(t);
2404 }
2405
2406 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2407 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2408 } else {
2409 imn = ntohl(pkt_dev->daddr_min);
2410 imx = ntohl(pkt_dev->daddr_max);
2411 if (imn < imx) {
2412 __u32 t;
2413 __be32 s;
2414 if (pkt_dev->flags & F_IPDST_RND) {
2415
2416 t = random32() % (imx - imn) + imn;
2417 s = htonl(t);
2418
2419 while (ipv4_is_loopback(s) ||
2420 ipv4_is_multicast(s) ||
2421 ipv4_is_lbcast(s) ||
2422 ipv4_is_zeronet(s) ||
2423 ipv4_is_local_multicast(s)) {
2424 t = random32() % (imx - imn) + imn;
2425 s = htonl(t);
2426 }
2427 pkt_dev->cur_daddr = s;
2428 } else {
2429 t = ntohl(pkt_dev->cur_daddr);
2430 t++;
2431 if (t > imx) {
2432 t = imn;
2433 }
2434 pkt_dev->cur_daddr = htonl(t);
2435 }
2436 }
2437 if (pkt_dev->cflows) {
2438 pkt_dev->flows[flow].flags |= F_INIT;
2439 pkt_dev->flows[flow].cur_daddr =
2440 pkt_dev->cur_daddr;
2441 #ifdef CONFIG_XFRM
2442 if (pkt_dev->flags & F_IPSEC_ON)
2443 get_ipsec_sa(pkt_dev, flow);
2444 #endif
2445 pkt_dev->nflows++;
2446 }
2447 }
2448 } else { /* IPV6 * */
2449
2450 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2451 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2452 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2453 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2454 else {
2455 int i;
2456
2457 /* Only random destinations yet */
2458
2459 for (i = 0; i < 4; i++) {
2460 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2461 (((__force __be32)random32() |
2462 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2463 pkt_dev->max_in6_daddr.s6_addr32[i]);
2464 }
2465 }
2466 }
2467
2468 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2469 __u32 t;
2470 if (pkt_dev->flags & F_TXSIZE_RND) {
2471 t = random32() %
2472 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2473 + pkt_dev->min_pkt_size;
2474 } else {
2475 t = pkt_dev->cur_pkt_size + 1;
2476 if (t > pkt_dev->max_pkt_size)
2477 t = pkt_dev->min_pkt_size;
2478 }
2479 pkt_dev->cur_pkt_size = t;
2480 }
2481
2482 set_cur_queue_map(pkt_dev);
2483
2484 pkt_dev->flows[flow].count++;
2485 }
2486
2487
2488 #ifdef CONFIG_XFRM
2489 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2490 {
2491 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2492 int err = 0;
2493 struct iphdr *iph;
2494
2495 if (!x)
2496 return 0;
2497 /* XXX: we dont support tunnel mode for now until
2498 * we resolve the dst issue */
2499 if (x->props.mode != XFRM_MODE_TRANSPORT)
2500 return 0;
2501
2502 spin_lock(&x->lock);
2503 iph = ip_hdr(skb);
2504
2505 err = x->outer_mode->output(x, skb);
2506 if (err)
2507 goto error;
2508 err = x->type->output(x, skb);
2509 if (err)
2510 goto error;
2511
2512 x->curlft.bytes += skb->len;
2513 x->curlft.packets++;
2514 error:
2515 spin_unlock(&x->lock);
2516 return err;
2517 }
2518
2519 static void free_SAs(struct pktgen_dev *pkt_dev)
2520 {
2521 if (pkt_dev->cflows) {
2522 /* let go of the SAs if we have them */
2523 int i;
2524 for (i = 0; i < pkt_dev->cflows; i++) {
2525 struct xfrm_state *x = pkt_dev->flows[i].x;
2526 if (x) {
2527 xfrm_state_put(x);
2528 pkt_dev->flows[i].x = NULL;
2529 }
2530 }
2531 }
2532 }
2533
2534 static int process_ipsec(struct pktgen_dev *pkt_dev,
2535 struct sk_buff *skb, __be16 protocol)
2536 {
2537 if (pkt_dev->flags & F_IPSEC_ON) {
2538 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2539 int nhead = 0;
2540 if (x) {
2541 int ret;
2542 __u8 *eth;
2543 nhead = x->props.header_len - skb_headroom(skb);
2544 if (nhead > 0) {
2545 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2546 if (ret < 0) {
2547 pr_err("Error expanding ipsec packet %d\n",
2548 ret);
2549 goto err;
2550 }
2551 }
2552
2553 /* ipsec is not expecting ll header */
2554 skb_pull(skb, ETH_HLEN);
2555 ret = pktgen_output_ipsec(skb, pkt_dev);
2556 if (ret) {
2557 pr_err("Error creating ipsec packet %d\n", ret);
2558 goto err;
2559 }
2560 /* restore ll */
2561 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2562 memcpy(eth, pkt_dev->hh, 12);
2563 *(u16 *) &eth[12] = protocol;
2564 }
2565 }
2566 return 1;
2567 err:
2568 kfree_skb(skb);
2569 return 0;
2570 }
2571 #endif
2572
2573 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2574 {
2575 unsigned i;
2576 for (i = 0; i < pkt_dev->nr_labels; i++)
2577 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2578
2579 mpls--;
2580 *mpls |= MPLS_STACK_BOTTOM;
2581 }
2582
2583 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2584 unsigned int prio)
2585 {
2586 return htons(id | (cfi << 12) | (prio << 13));
2587 }
2588
2589 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2590 struct pktgen_dev *pkt_dev)
2591 {
2592 struct sk_buff *skb = NULL;
2593 __u8 *eth;
2594 struct udphdr *udph;
2595 int datalen, iplen;
2596 struct iphdr *iph;
2597 struct pktgen_hdr *pgh = NULL;
2598 __be16 protocol = htons(ETH_P_IP);
2599 __be32 *mpls;
2600 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2601 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2602 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2603 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2604 u16 queue_map;
2605
2606 if (pkt_dev->nr_labels)
2607 protocol = htons(ETH_P_MPLS_UC);
2608
2609 if (pkt_dev->vlan_id != 0xffff)
2610 protocol = htons(ETH_P_8021Q);
2611
2612 /* Update any of the values, used when we're incrementing various
2613 * fields.
2614 */
2615 mod_cur_headers(pkt_dev);
2616 queue_map = pkt_dev->cur_queue_map;
2617
2618 datalen = (odev->hard_header_len + 16) & ~0xf;
2619
2620 if (pkt_dev->flags & F_NODE) {
2621 int node;
2622
2623 if (pkt_dev->node >= 0)
2624 node = pkt_dev->node;
2625 else
2626 node = numa_node_id();
2627
2628 skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64
2629 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node);
2630 if (likely(skb)) {
2631 skb_reserve(skb, NET_SKB_PAD);
2632 skb->dev = odev;
2633 }
2634 }
2635 else
2636 skb = __netdev_alloc_skb(odev,
2637 pkt_dev->cur_pkt_size + 64
2638 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2639
2640 if (!skb) {
2641 sprintf(pkt_dev->result, "No memory");
2642 return NULL;
2643 }
2644
2645 skb_reserve(skb, datalen);
2646
2647 /* Reserve for ethernet and IP header */
2648 eth = (__u8 *) skb_push(skb, 14);
2649 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2650 if (pkt_dev->nr_labels)
2651 mpls_push(mpls, pkt_dev);
2652
2653 if (pkt_dev->vlan_id != 0xffff) {
2654 if (pkt_dev->svlan_id != 0xffff) {
2655 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2656 *svlan_tci = build_tci(pkt_dev->svlan_id,
2657 pkt_dev->svlan_cfi,
2658 pkt_dev->svlan_p);
2659 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2660 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2661 }
2662 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2663 *vlan_tci = build_tci(pkt_dev->vlan_id,
2664 pkt_dev->vlan_cfi,
2665 pkt_dev->vlan_p);
2666 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2667 *vlan_encapsulated_proto = htons(ETH_P_IP);
2668 }
2669
2670 skb->network_header = skb->tail;
2671 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2672 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2673 skb_set_queue_mapping(skb, queue_map);
2674 iph = ip_hdr(skb);
2675 udph = udp_hdr(skb);
2676
2677 memcpy(eth, pkt_dev->hh, 12);
2678 *(__be16 *) & eth[12] = protocol;
2679
2680 /* Eth + IPh + UDPh + mpls */
2681 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2682 pkt_dev->pkt_overhead;
2683 if (datalen < sizeof(struct pktgen_hdr))
2684 datalen = sizeof(struct pktgen_hdr);
2685
2686 udph->source = htons(pkt_dev->cur_udp_src);
2687 udph->dest = htons(pkt_dev->cur_udp_dst);
2688 udph->len = htons(datalen + 8); /* DATA + udphdr */
2689 udph->check = 0; /* No checksum */
2690
2691 iph->ihl = 5;
2692 iph->version = 4;
2693 iph->ttl = 32;
2694 iph->tos = pkt_dev->tos;
2695 iph->protocol = IPPROTO_UDP; /* UDP */
2696 iph->saddr = pkt_dev->cur_saddr;
2697 iph->daddr = pkt_dev->cur_daddr;
2698 iph->id = htons(pkt_dev->ip_id);
2699 pkt_dev->ip_id++;
2700 iph->frag_off = 0;
2701 iplen = 20 + 8 + datalen;
2702 iph->tot_len = htons(iplen);
2703 iph->check = 0;
2704 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2705 skb->protocol = protocol;
2706 skb->mac_header = (skb->network_header - ETH_HLEN -
2707 pkt_dev->pkt_overhead);
2708 skb->dev = odev;
2709 skb->pkt_type = PACKET_HOST;
2710
2711 if (pkt_dev->nfrags <= 0) {
2712 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2713 memset(pgh + 1, 0, datalen - sizeof(struct pktgen_hdr));
2714 } else {
2715 int frags = pkt_dev->nfrags;
2716 int i, len;
2717
2718 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2719
2720 if (frags > MAX_SKB_FRAGS)
2721 frags = MAX_SKB_FRAGS;
2722 if (datalen > frags * PAGE_SIZE) {
2723 len = datalen - frags * PAGE_SIZE;
2724 memset(skb_put(skb, len), 0, len);
2725 datalen = frags * PAGE_SIZE;
2726 }
2727
2728 i = 0;
2729 while (datalen > 0) {
2730 struct page *page = alloc_pages(GFP_KERNEL | __GFP_ZERO, 0);
2731 skb_shinfo(skb)->frags[i].page = page;
2732 skb_shinfo(skb)->frags[i].page_offset = 0;
2733 skb_shinfo(skb)->frags[i].size =
2734 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2735 datalen -= skb_shinfo(skb)->frags[i].size;
2736 skb->len += skb_shinfo(skb)->frags[i].size;
2737 skb->data_len += skb_shinfo(skb)->frags[i].size;
2738 i++;
2739 skb_shinfo(skb)->nr_frags = i;
2740 }
2741
2742 while (i < frags) {
2743 int rem;
2744
2745 if (i == 0)
2746 break;
2747
2748 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2749 if (rem == 0)
2750 break;
2751
2752 skb_shinfo(skb)->frags[i - 1].size -= rem;
2753
2754 skb_shinfo(skb)->frags[i] =
2755 skb_shinfo(skb)->frags[i - 1];
2756 get_page(skb_shinfo(skb)->frags[i].page);
2757 skb_shinfo(skb)->frags[i].page =
2758 skb_shinfo(skb)->frags[i - 1].page;
2759 skb_shinfo(skb)->frags[i].page_offset +=
2760 skb_shinfo(skb)->frags[i - 1].size;
2761 skb_shinfo(skb)->frags[i].size = rem;
2762 i++;
2763 skb_shinfo(skb)->nr_frags = i;
2764 }
2765 }
2766
2767 /* Stamp the time, and sequence number,
2768 * convert them to network byte order
2769 */
2770 if (pgh) {
2771 struct timeval timestamp;
2772
2773 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2774 pgh->seq_num = htonl(pkt_dev->seq_num);
2775
2776 do_gettimeofday(&timestamp);
2777 pgh->tv_sec = htonl(timestamp.tv_sec);
2778 pgh->tv_usec = htonl(timestamp.tv_usec);
2779 }
2780
2781 #ifdef CONFIG_XFRM
2782 if (!process_ipsec(pkt_dev, skb, protocol))
2783 return NULL;
2784 #endif
2785
2786 return skb;
2787 }
2788
2789 /*
2790 * scan_ip6, fmt_ip taken from dietlibc-0.21
2791 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2792 *
2793 * Slightly modified for kernel.
2794 * Should be candidate for net/ipv4/utils.c
2795 * --ro
2796 */
2797
2798 static unsigned int scan_ip6(const char *s, char ip[16])
2799 {
2800 unsigned int i;
2801 unsigned int len = 0;
2802 unsigned long u;
2803 char suffix[16];
2804 unsigned int prefixlen = 0;
2805 unsigned int suffixlen = 0;
2806 __be32 tmp;
2807 char *pos;
2808
2809 for (i = 0; i < 16; i++)
2810 ip[i] = 0;
2811
2812 for (;;) {
2813 if (*s == ':') {
2814 len++;
2815 if (s[1] == ':') { /* Found "::", skip to part 2 */
2816 s += 2;
2817 len++;
2818 break;
2819 }
2820 s++;
2821 }
2822
2823 u = simple_strtoul(s, &pos, 16);
2824 i = pos - s;
2825 if (!i)
2826 return 0;
2827 if (prefixlen == 12 && s[i] == '.') {
2828
2829 /* the last 4 bytes may be written as IPv4 address */
2830
2831 tmp = in_aton(s);
2832 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2833 return i + len;
2834 }
2835 ip[prefixlen++] = (u >> 8);
2836 ip[prefixlen++] = (u & 255);
2837 s += i;
2838 len += i;
2839 if (prefixlen == 16)
2840 return len;
2841 }
2842
2843 /* part 2, after "::" */
2844 for (;;) {
2845 if (*s == ':') {
2846 if (suffixlen == 0)
2847 break;
2848 s++;
2849 len++;
2850 } else if (suffixlen != 0)
2851 break;
2852
2853 u = simple_strtol(s, &pos, 16);
2854 i = pos - s;
2855 if (!i) {
2856 if (*s)
2857 len--;
2858 break;
2859 }
2860 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2861 tmp = in_aton(s);
2862 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2863 sizeof(tmp));
2864 suffixlen += 4;
2865 len += strlen(s);
2866 break;
2867 }
2868 suffix[suffixlen++] = (u >> 8);
2869 suffix[suffixlen++] = (u & 255);
2870 s += i;
2871 len += i;
2872 if (prefixlen + suffixlen == 16)
2873 break;
2874 }
2875 for (i = 0; i < suffixlen; i++)
2876 ip[16 - suffixlen + i] = suffix[i];
2877 return len;
2878 }
2879
2880 static char tohex(char hexdigit)
2881 {
2882 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2883 }
2884
2885 static int fmt_xlong(char *s, unsigned int i)
2886 {
2887 char *bak = s;
2888 *s = tohex((i >> 12) & 0xf);
2889 if (s != bak || *s != '0')
2890 ++s;
2891 *s = tohex((i >> 8) & 0xf);
2892 if (s != bak || *s != '0')
2893 ++s;
2894 *s = tohex((i >> 4) & 0xf);
2895 if (s != bak || *s != '0')
2896 ++s;
2897 *s = tohex(i & 0xf);
2898 return s - bak + 1;
2899 }
2900
2901 static unsigned int fmt_ip6(char *s, const char ip[16])
2902 {
2903 unsigned int len;
2904 unsigned int i;
2905 unsigned int temp;
2906 unsigned int compressing;
2907 int j;
2908
2909 len = 0;
2910 compressing = 0;
2911 for (j = 0; j < 16; j += 2) {
2912
2913 #ifdef V4MAPPEDPREFIX
2914 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2915 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2916 temp = strlen(s);
2917 return len + temp;
2918 }
2919 #endif
2920 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2921 (unsigned long)(unsigned char)ip[j + 1];
2922 if (temp == 0) {
2923 if (!compressing) {
2924 compressing = 1;
2925 if (j == 0) {
2926 *s++ = ':';
2927 ++len;
2928 }
2929 }
2930 } else {
2931 if (compressing) {
2932 compressing = 0;
2933 *s++ = ':';
2934 ++len;
2935 }
2936 i = fmt_xlong(s, temp);
2937 len += i;
2938 s += i;
2939 if (j < 14) {
2940 *s++ = ':';
2941 ++len;
2942 }
2943 }
2944 }
2945 if (compressing) {
2946 *s++ = ':';
2947 ++len;
2948 }
2949 *s = 0;
2950 return len;
2951 }
2952
2953 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2954 struct pktgen_dev *pkt_dev)
2955 {
2956 struct sk_buff *skb = NULL;
2957 __u8 *eth;
2958 struct udphdr *udph;
2959 int datalen;
2960 struct ipv6hdr *iph;
2961 struct pktgen_hdr *pgh = NULL;
2962 __be16 protocol = htons(ETH_P_IPV6);
2963 __be32 *mpls;
2964 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2965 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2966 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2967 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2968 u16 queue_map;
2969
2970 if (pkt_dev->nr_labels)
2971 protocol = htons(ETH_P_MPLS_UC);
2972
2973 if (pkt_dev->vlan_id != 0xffff)
2974 protocol = htons(ETH_P_8021Q);
2975
2976 /* Update any of the values, used when we're incrementing various
2977 * fields.
2978 */
2979 mod_cur_headers(pkt_dev);
2980 queue_map = pkt_dev->cur_queue_map;
2981
2982 skb = __netdev_alloc_skb(odev,
2983 pkt_dev->cur_pkt_size + 64
2984 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
2985 if (!skb) {
2986 sprintf(pkt_dev->result, "No memory");
2987 return NULL;
2988 }
2989
2990 skb_reserve(skb, 16);
2991
2992 /* Reserve for ethernet and IP header */
2993 eth = (__u8 *) skb_push(skb, 14);
2994 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2995 if (pkt_dev->nr_labels)
2996 mpls_push(mpls, pkt_dev);
2997
2998 if (pkt_dev->vlan_id != 0xffff) {
2999 if (pkt_dev->svlan_id != 0xffff) {
3000 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
3001 *svlan_tci = build_tci(pkt_dev->svlan_id,
3002 pkt_dev->svlan_cfi,
3003 pkt_dev->svlan_p);
3004 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
3005 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
3006 }
3007 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
3008 *vlan_tci = build_tci(pkt_dev->vlan_id,
3009 pkt_dev->vlan_cfi,
3010 pkt_dev->vlan_p);
3011 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
3012 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
3013 }
3014
3015 skb->network_header = skb->tail;
3016 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
3017 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
3018 skb_set_queue_mapping(skb, queue_map);
3019 iph = ipv6_hdr(skb);
3020 udph = udp_hdr(skb);
3021
3022 memcpy(eth, pkt_dev->hh, 12);
3023 *(__be16 *) &eth[12] = protocol;
3024
3025 /* Eth + IPh + UDPh + mpls */
3026 datalen = pkt_dev->cur_pkt_size - 14 -
3027 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
3028 pkt_dev->pkt_overhead;
3029
3030 if (datalen < sizeof(struct pktgen_hdr)) {
3031 datalen = sizeof(struct pktgen_hdr);
3032 if (net_ratelimit())
3033 pr_info("increased datalen to %d\n", datalen);
3034 }
3035
3036 udph->source = htons(pkt_dev->cur_udp_src);
3037 udph->dest = htons(pkt_dev->cur_udp_dst);
3038 udph->len = htons(datalen + sizeof(struct udphdr));
3039 udph->check = 0; /* No checksum */
3040
3041 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
3042
3043 if (pkt_dev->traffic_class) {
3044 /* Version + traffic class + flow (0) */
3045 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
3046 }
3047
3048 iph->hop_limit = 32;
3049
3050 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
3051 iph->nexthdr = IPPROTO_UDP;
3052
3053 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
3054 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
3055
3056 skb->mac_header = (skb->network_header - ETH_HLEN -
3057 pkt_dev->pkt_overhead);
3058 skb->protocol = protocol;
3059 skb->dev = odev;
3060 skb->pkt_type = PACKET_HOST;
3061
3062 if (pkt_dev->nfrags <= 0)
3063 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
3064 else {
3065 int frags = pkt_dev->nfrags;
3066 int i;
3067
3068 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
3069
3070 if (frags > MAX_SKB_FRAGS)
3071 frags = MAX_SKB_FRAGS;
3072 if (datalen > frags * PAGE_SIZE) {
3073 skb_put(skb, datalen - frags * PAGE_SIZE);
3074 datalen = frags * PAGE_SIZE;
3075 }
3076
3077 i = 0;
3078 while (datalen > 0) {
3079 struct page *page = alloc_pages(GFP_KERNEL, 0);
3080 skb_shinfo(skb)->frags[i].page = page;
3081 skb_shinfo(skb)->frags[i].page_offset = 0;
3082 skb_shinfo(skb)->frags[i].size =
3083 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
3084 datalen -= skb_shinfo(skb)->frags[i].size;
3085 skb->len += skb_shinfo(skb)->frags[i].size;
3086 skb->data_len += skb_shinfo(skb)->frags[i].size;
3087 i++;
3088 skb_shinfo(skb)->nr_frags = i;
3089 }
3090
3091 while (i < frags) {
3092 int rem;
3093
3094 if (i == 0)
3095 break;
3096
3097 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
3098 if (rem == 0)
3099 break;
3100
3101 skb_shinfo(skb)->frags[i - 1].size -= rem;
3102
3103 skb_shinfo(skb)->frags[i] =
3104 skb_shinfo(skb)->frags[i - 1];
3105 get_page(skb_shinfo(skb)->frags[i].page);
3106 skb_shinfo(skb)->frags[i].page =
3107 skb_shinfo(skb)->frags[i - 1].page;
3108 skb_shinfo(skb)->frags[i].page_offset +=
3109 skb_shinfo(skb)->frags[i - 1].size;
3110 skb_shinfo(skb)->frags[i].size = rem;
3111 i++;
3112 skb_shinfo(skb)->nr_frags = i;
3113 }
3114 }
3115
3116 /* Stamp the time, and sequence number,
3117 * convert them to network byte order
3118 * should we update cloned packets too ?
3119 */
3120 if (pgh) {
3121 struct timeval timestamp;
3122
3123 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
3124 pgh->seq_num = htonl(pkt_dev->seq_num);
3125
3126 do_gettimeofday(&timestamp);
3127 pgh->tv_sec = htonl(timestamp.tv_sec);
3128 pgh->tv_usec = htonl(timestamp.tv_usec);
3129 }
3130 /* pkt_dev->seq_num++; FF: you really mean this? */
3131
3132 return skb;
3133 }
3134
3135 static struct sk_buff *fill_packet(struct net_device *odev,
3136 struct pktgen_dev *pkt_dev)
3137 {
3138 if (pkt_dev->flags & F_IPV6)
3139 return fill_packet_ipv6(odev, pkt_dev);
3140 else
3141 return fill_packet_ipv4(odev, pkt_dev);
3142 }
3143
3144 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3145 {
3146 pkt_dev->seq_num = 1;
3147 pkt_dev->idle_acc = 0;
3148 pkt_dev->sofar = 0;
3149 pkt_dev->tx_bytes = 0;
3150 pkt_dev->errors = 0;
3151 }
3152
3153 /* Set up structure for sending pkts, clear counters */
3154
3155 static void pktgen_run(struct pktgen_thread *t)
3156 {
3157 struct pktgen_dev *pkt_dev;
3158 int started = 0;
3159
3160 func_enter();
3161
3162 if_lock(t);
3163 list_for_each_entry(pkt_dev, &t->if_list, list) {
3164
3165 /*
3166 * setup odev and create initial packet.
3167 */
3168 pktgen_setup_inject(pkt_dev);
3169
3170 if (pkt_dev->odev) {
3171 pktgen_clear_counters(pkt_dev);
3172 pkt_dev->running = 1; /* Cranke yeself! */
3173 pkt_dev->skb = NULL;
3174 pkt_dev->started_at =
3175 pkt_dev->next_tx = ktime_now();
3176
3177 set_pkt_overhead(pkt_dev);
3178
3179 strcpy(pkt_dev->result, "Starting");
3180 started++;
3181 } else
3182 strcpy(pkt_dev->result, "Error starting");
3183 }
3184 if_unlock(t);
3185 if (started)
3186 t->control &= ~(T_STOP);
3187 }
3188
3189 static void pktgen_stop_all_threads_ifs(void)
3190 {
3191 struct pktgen_thread *t;
3192
3193 func_enter();
3194
3195 mutex_lock(&pktgen_thread_lock);
3196
3197 list_for_each_entry(t, &pktgen_threads, th_list)
3198 t->control |= T_STOP;
3199
3200 mutex_unlock(&pktgen_thread_lock);
3201 }
3202
3203 static int thread_is_running(const struct pktgen_thread *t)
3204 {
3205 const struct pktgen_dev *pkt_dev;
3206
3207 list_for_each_entry(pkt_dev, &t->if_list, list)
3208 if (pkt_dev->running)
3209 return 1;
3210 return 0;
3211 }
3212
3213 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3214 {
3215 if_lock(t);
3216
3217 while (thread_is_running(t)) {
3218
3219 if_unlock(t);
3220
3221 msleep_interruptible(100);
3222
3223 if (signal_pending(current))
3224 goto signal;
3225 if_lock(t);
3226 }
3227 if_unlock(t);
3228 return 1;
3229 signal:
3230 return 0;
3231 }
3232
3233 static int pktgen_wait_all_threads_run(void)
3234 {
3235 struct pktgen_thread *t;
3236 int sig = 1;
3237
3238 mutex_lock(&pktgen_thread_lock);
3239
3240 list_for_each_entry(t, &pktgen_threads, th_list) {
3241 sig = pktgen_wait_thread_run(t);
3242 if (sig == 0)
3243 break;
3244 }
3245
3246 if (sig == 0)
3247 list_for_each_entry(t, &pktgen_threads, th_list)
3248 t->control |= (T_STOP);
3249
3250 mutex_unlock(&pktgen_thread_lock);
3251 return sig;
3252 }
3253
3254 static void pktgen_run_all_threads(void)
3255 {
3256 struct pktgen_thread *t;
3257
3258 func_enter();
3259
3260 mutex_lock(&pktgen_thread_lock);
3261
3262 list_for_each_entry(t, &pktgen_threads, th_list)
3263 t->control |= (T_RUN);
3264
3265 mutex_unlock(&pktgen_thread_lock);
3266
3267 /* Propagate thread->control */
3268 schedule_timeout_interruptible(msecs_to_jiffies(125));
3269
3270 pktgen_wait_all_threads_run();
3271 }
3272
3273 static void pktgen_reset_all_threads(void)
3274 {
3275 struct pktgen_thread *t;
3276
3277 func_enter();
3278
3279 mutex_lock(&pktgen_thread_lock);
3280
3281 list_for_each_entry(t, &pktgen_threads, th_list)
3282 t->control |= (T_REMDEVALL);
3283
3284 mutex_unlock(&pktgen_thread_lock);
3285
3286 /* Propagate thread->control */
3287 schedule_timeout_interruptible(msecs_to_jiffies(125));
3288
3289 pktgen_wait_all_threads_run();
3290 }
3291
3292 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3293 {
3294 __u64 bps, mbps, pps;
3295 char *p = pkt_dev->result;
3296 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3297 pkt_dev->started_at);
3298 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3299
3300 p += sprintf(p, "OK: %llu(c%llu+d%llu) nsec, %llu (%dbyte,%dfrags)\n",
3301 (unsigned long long)ktime_to_us(elapsed),
3302 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3303 (unsigned long long)ktime_to_us(idle),
3304 (unsigned long long)pkt_dev->sofar,
3305 pkt_dev->cur_pkt_size, nr_frags);
3306
3307 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3308 ktime_to_ns(elapsed));
3309
3310 bps = pps * 8 * pkt_dev->cur_pkt_size;
3311
3312 mbps = bps;
3313 do_div(mbps, 1000000);
3314 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3315 (unsigned long long)pps,
3316 (unsigned long long)mbps,
3317 (unsigned long long)bps,
3318 (unsigned long long)pkt_dev->errors);
3319 }
3320
3321 /* Set stopped-at timer, remove from running list, do counters & statistics */
3322 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3323 {
3324 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3325
3326 if (!pkt_dev->running) {
3327 pr_warning("interface: %s is already stopped\n",
3328 pkt_dev->odevname);
3329 return -EINVAL;
3330 }
3331
3332 kfree_skb(pkt_dev->skb);
3333 pkt_dev->skb = NULL;
3334 pkt_dev->stopped_at = ktime_now();
3335 pkt_dev->running = 0;
3336
3337 show_results(pkt_dev, nr_frags);
3338
3339 return 0;
3340 }
3341
3342 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3343 {
3344 struct pktgen_dev *pkt_dev, *best = NULL;
3345
3346 if_lock(t);
3347
3348 list_for_each_entry(pkt_dev, &t->if_list, list) {
3349 if (!pkt_dev->running)
3350 continue;
3351 if (best == NULL)
3352 best = pkt_dev;
3353 else if (ktime_lt(pkt_dev->next_tx, best->next_tx))
3354 best = pkt_dev;
3355 }
3356 if_unlock(t);
3357 return best;
3358 }
3359
3360 static void pktgen_stop(struct pktgen_thread *t)
3361 {
3362 struct pktgen_dev *pkt_dev;
3363
3364 func_enter();
3365
3366 if_lock(t);
3367
3368 list_for_each_entry(pkt_dev, &t->if_list, list) {
3369 pktgen_stop_device(pkt_dev);
3370 }
3371
3372 if_unlock(t);
3373 }
3374
3375 /*
3376 * one of our devices needs to be removed - find it
3377 * and remove it
3378 */
3379 static void pktgen_rem_one_if(struct pktgen_thread *t)
3380 {
3381 struct list_head *q, *n;
3382 struct pktgen_dev *cur;
3383
3384 func_enter();
3385
3386 if_lock(t);
3387
3388 list_for_each_safe(q, n, &t->if_list) {
3389 cur = list_entry(q, struct pktgen_dev, list);
3390
3391 if (!cur->removal_mark)
3392 continue;
3393
3394 kfree_skb(cur->skb);
3395 cur->skb = NULL;
3396
3397 pktgen_remove_device(t, cur);
3398
3399 break;
3400 }
3401
3402 if_unlock(t);
3403 }
3404
3405 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3406 {
3407 struct list_head *q, *n;
3408 struct pktgen_dev *cur;
3409
3410 func_enter();
3411
3412 /* Remove all devices, free mem */
3413
3414 if_lock(t);
3415
3416 list_for_each_safe(q, n, &t->if_list) {
3417 cur = list_entry(q, struct pktgen_dev, list);
3418
3419 kfree_skb(cur->skb);
3420 cur->skb = NULL;
3421
3422 pktgen_remove_device(t, cur);
3423 }
3424
3425 if_unlock(t);
3426 }
3427
3428 static void pktgen_rem_thread(struct pktgen_thread *t)
3429 {
3430 /* Remove from the thread list */
3431
3432 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3433
3434 mutex_lock(&pktgen_thread_lock);
3435
3436 list_del(&t->th_list);
3437
3438 mutex_unlock(&pktgen_thread_lock);
3439 }
3440
3441 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3442 {
3443 ktime_t idle_start = ktime_now();
3444 schedule();
3445 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3446 }
3447
3448 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3449 {
3450 ktime_t idle_start = ktime_now();
3451
3452 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3453 if (signal_pending(current))
3454 break;
3455
3456 if (need_resched())
3457 pktgen_resched(pkt_dev);
3458 else
3459 cpu_relax();
3460 }
3461 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3462 }
3463
3464 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3465 {
3466 struct net_device *odev = pkt_dev->odev;
3467 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3468 = odev->netdev_ops->ndo_start_xmit;
3469 struct netdev_queue *txq;
3470 u16 queue_map;
3471 int ret;
3472
3473 /* If device is offline, then don't send */
3474 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3475 pktgen_stop_device(pkt_dev);
3476 return;
3477 }
3478
3479 /* This is max DELAY, this has special meaning of
3480 * "never transmit"
3481 */
3482 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3483 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX);
3484 return;
3485 }
3486
3487 /* If no skb or clone count exhausted then get new one */
3488 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3489 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3490 /* build a new pkt */
3491 kfree_skb(pkt_dev->skb);
3492
3493 pkt_dev->skb = fill_packet(odev, pkt_dev);
3494 if (pkt_dev->skb == NULL) {
3495 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3496 schedule();
3497 pkt_dev->clone_count--; /* back out increment, OOM */
3498 return;
3499 }
3500 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3501 pkt_dev->allocated_skbs++;
3502 pkt_dev->clone_count = 0; /* reset counter */
3503 }
3504
3505 if (pkt_dev->delay && pkt_dev->last_ok)
3506 spin(pkt_dev, pkt_dev->next_tx);
3507
3508 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3509 txq = netdev_get_tx_queue(odev, queue_map);
3510
3511 __netif_tx_lock_bh(txq);
3512
3513 if (unlikely(netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq))) {
3514 ret = NETDEV_TX_BUSY;
3515 pkt_dev->last_ok = 0;
3516 goto unlock;
3517 }
3518 atomic_inc(&(pkt_dev->skb->users));
3519 ret = (*xmit)(pkt_dev->skb, odev);
3520
3521 switch (ret) {
3522 case NETDEV_TX_OK:
3523 txq_trans_update(txq);
3524 pkt_dev->last_ok = 1;
3525 pkt_dev->sofar++;
3526 pkt_dev->seq_num++;
3527 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3528 break;
3529 case NET_XMIT_DROP:
3530 case NET_XMIT_CN:
3531 case NET_XMIT_POLICED:
3532 /* skb has been consumed */
3533 pkt_dev->errors++;
3534 break;
3535 default: /* Drivers are not supposed to return other values! */
3536 if (net_ratelimit())
3537 pr_info("pktgen: %s xmit error: %d\n",
3538 pkt_dev->odevname, ret);
3539 pkt_dev->errors++;
3540 /* fallthru */
3541 case NETDEV_TX_LOCKED:
3542 case NETDEV_TX_BUSY:
3543 /* Retry it next time */
3544 atomic_dec(&(pkt_dev->skb->users));
3545 pkt_dev->last_ok = 0;
3546 }
3547 unlock:
3548 __netif_tx_unlock_bh(txq);
3549
3550 /* If pkt_dev->count is zero, then run forever */
3551 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3552 pktgen_wait_for_skb(pkt_dev);
3553
3554 /* Done with this */
3555 pktgen_stop_device(pkt_dev);
3556 }
3557 }
3558
3559 /*
3560 * Main loop of the thread goes here
3561 */
3562
3563 static int pktgen_thread_worker(void *arg)
3564 {
3565 DEFINE_WAIT(wait);
3566 struct pktgen_thread *t = arg;
3567 struct pktgen_dev *pkt_dev = NULL;
3568 int cpu = t->cpu;
3569
3570 BUG_ON(smp_processor_id() != cpu);
3571
3572 init_waitqueue_head(&t->queue);
3573 complete(&t->start_done);
3574
3575 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3576
3577 set_current_state(TASK_INTERRUPTIBLE);
3578
3579 set_freezable();
3580
3581 while (!kthread_should_stop()) {
3582 pkt_dev = next_to_run(t);
3583
3584 if (unlikely(!pkt_dev && t->control == 0)) {
3585 wait_event_interruptible_timeout(t->queue,
3586 t->control != 0,
3587 HZ/10);
3588 try_to_freeze();
3589 continue;
3590 }
3591
3592 __set_current_state(TASK_RUNNING);
3593
3594 if (likely(pkt_dev)) {
3595 pktgen_xmit(pkt_dev);
3596
3597 if (need_resched())
3598 pktgen_resched(pkt_dev);
3599 else
3600 cpu_relax();
3601 }
3602
3603 if (t->control & T_STOP) {
3604 pktgen_stop(t);
3605 t->control &= ~(T_STOP);
3606 }
3607
3608 if (t->control & T_RUN) {
3609 pktgen_run(t);
3610 t->control &= ~(T_RUN);
3611 }
3612
3613 if (t->control & T_REMDEVALL) {
3614 pktgen_rem_all_ifs(t);
3615 t->control &= ~(T_REMDEVALL);
3616 }
3617
3618 if (t->control & T_REMDEV) {
3619 pktgen_rem_one_if(t);
3620 t->control &= ~(T_REMDEV);
3621 }
3622
3623 try_to_freeze();
3624
3625 set_current_state(TASK_INTERRUPTIBLE);
3626 }
3627
3628 pr_debug("%s stopping all device\n", t->tsk->comm);
3629 pktgen_stop(t);
3630
3631 pr_debug("%s removing all device\n", t->tsk->comm);
3632 pktgen_rem_all_ifs(t);
3633
3634 pr_debug("%s removing thread\n", t->tsk->comm);
3635 pktgen_rem_thread(t);
3636
3637 return 0;
3638 }
3639
3640 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3641 const char *ifname, bool exact)
3642 {
3643 struct pktgen_dev *p, *pkt_dev = NULL;
3644 size_t len = strlen(ifname);
3645
3646 if_lock(t);
3647 list_for_each_entry(p, &t->if_list, list)
3648 if (strncmp(p->odevname, ifname, len) == 0) {
3649 if (p->odevname[len]) {
3650 if (exact || p->odevname[len] != '@')
3651 continue;
3652 }
3653 pkt_dev = p;
3654 break;
3655 }
3656
3657 if_unlock(t);
3658 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3659 return pkt_dev;
3660 }
3661
3662 /*
3663 * Adds a dev at front of if_list.
3664 */
3665
3666 static int add_dev_to_thread(struct pktgen_thread *t,
3667 struct pktgen_dev *pkt_dev)
3668 {
3669 int rv = 0;
3670
3671 if_lock(t);
3672
3673 if (pkt_dev->pg_thread) {
3674 pr_err("ERROR: already assigned to a thread\n");
3675 rv = -EBUSY;
3676 goto out;
3677 }
3678
3679 list_add(&pkt_dev->list, &t->if_list);
3680 pkt_dev->pg_thread = t;
3681 pkt_dev->running = 0;
3682
3683 out:
3684 if_unlock(t);
3685 return rv;
3686 }
3687
3688 /* Called under thread lock */
3689
3690 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3691 {
3692 struct pktgen_dev *pkt_dev;
3693 int err;
3694 int node = cpu_to_node(t->cpu);
3695
3696 /* We don't allow a device to be on several threads */
3697
3698 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3699 if (pkt_dev) {
3700 pr_err("ERROR: interface already used\n");
3701 return -EBUSY;
3702 }
3703
3704 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3705 if (!pkt_dev)
3706 return -ENOMEM;
3707
3708 strcpy(pkt_dev->odevname, ifname);
3709 pkt_dev->flows = vmalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3710 node);
3711 if (pkt_dev->flows == NULL) {
3712 kfree(pkt_dev);
3713 return -ENOMEM;
3714 }
3715 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3716
3717 pkt_dev->removal_mark = 0;
3718 pkt_dev->min_pkt_size = ETH_ZLEN;
3719 pkt_dev->max_pkt_size = ETH_ZLEN;
3720 pkt_dev->nfrags = 0;
3721 pkt_dev->clone_skb = pg_clone_skb_d;
3722 pkt_dev->delay = pg_delay_d;
3723 pkt_dev->count = pg_count_d;
3724 pkt_dev->sofar = 0;
3725 pkt_dev->udp_src_min = 9; /* sink port */
3726 pkt_dev->udp_src_max = 9;
3727 pkt_dev->udp_dst_min = 9;
3728 pkt_dev->udp_dst_max = 9;
3729
3730 pkt_dev->vlan_p = 0;
3731 pkt_dev->vlan_cfi = 0;
3732 pkt_dev->vlan_id = 0xffff;
3733 pkt_dev->svlan_p = 0;
3734 pkt_dev->svlan_cfi = 0;
3735 pkt_dev->svlan_id = 0xffff;
3736 pkt_dev->node = -1;
3737
3738 err = pktgen_setup_dev(pkt_dev, ifname);
3739 if (err)
3740 goto out1;
3741
3742 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3743 &pktgen_if_fops, pkt_dev);
3744 if (!pkt_dev->entry) {
3745 pr_err("cannot create %s/%s procfs entry\n",
3746 PG_PROC_DIR, ifname);
3747 err = -EINVAL;
3748 goto out2;
3749 }
3750 #ifdef CONFIG_XFRM
3751 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3752 pkt_dev->ipsproto = IPPROTO_ESP;
3753 #endif
3754
3755 return add_dev_to_thread(t, pkt_dev);
3756 out2:
3757 dev_put(pkt_dev->odev);
3758 out1:
3759 #ifdef CONFIG_XFRM
3760 free_SAs(pkt_dev);
3761 #endif
3762 vfree(pkt_dev->flows);
3763 kfree(pkt_dev);
3764 return err;
3765 }
3766
3767 static int __init pktgen_create_thread(int cpu)
3768 {
3769 struct pktgen_thread *t;
3770 struct proc_dir_entry *pe;
3771 struct task_struct *p;
3772
3773 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3774 cpu_to_node(cpu));
3775 if (!t) {
3776 pr_err("ERROR: out of memory, can't create new thread\n");
3777 return -ENOMEM;
3778 }
3779
3780 spin_lock_init(&t->if_lock);
3781 t->cpu = cpu;
3782
3783 INIT_LIST_HEAD(&t->if_list);
3784
3785 list_add_tail(&t->th_list, &pktgen_threads);
3786 init_completion(&t->start_done);
3787
3788 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu);
3789 if (IS_ERR(p)) {
3790 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3791 list_del(&t->th_list);
3792 kfree(t);
3793 return PTR_ERR(p);
3794 }
3795 kthread_bind(p, cpu);
3796 t->tsk = p;
3797
3798 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3799 &pktgen_thread_fops, t);
3800 if (!pe) {
3801 pr_err("cannot create %s/%s procfs entry\n",
3802 PG_PROC_DIR, t->tsk->comm);
3803 kthread_stop(p);
3804 list_del(&t->th_list);
3805 kfree(t);
3806 return -EINVAL;
3807 }
3808
3809 wake_up_process(p);
3810 wait_for_completion(&t->start_done);
3811
3812 return 0;
3813 }
3814
3815 /*
3816 * Removes a device from the thread if_list.
3817 */
3818 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3819 struct pktgen_dev *pkt_dev)
3820 {
3821 struct list_head *q, *n;
3822 struct pktgen_dev *p;
3823
3824 list_for_each_safe(q, n, &t->if_list) {
3825 p = list_entry(q, struct pktgen_dev, list);
3826 if (p == pkt_dev)
3827 list_del(&p->list);
3828 }
3829 }
3830
3831 static int pktgen_remove_device(struct pktgen_thread *t,
3832 struct pktgen_dev *pkt_dev)
3833 {
3834
3835 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3836
3837 if (pkt_dev->running) {
3838 pr_warning("WARNING: trying to remove a running interface, stopping it now\n");
3839 pktgen_stop_device(pkt_dev);
3840 }
3841
3842 /* Dis-associate from the interface */
3843
3844 if (pkt_dev->odev) {
3845 dev_put(pkt_dev->odev);
3846 pkt_dev->odev = NULL;
3847 }
3848
3849 /* And update the thread if_list */
3850
3851 _rem_dev_from_if_list(t, pkt_dev);
3852
3853 if (pkt_dev->entry)
3854 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3855
3856 #ifdef CONFIG_XFRM
3857 free_SAs(pkt_dev);
3858 #endif
3859 vfree(pkt_dev->flows);
3860 kfree(pkt_dev);
3861 return 0;
3862 }
3863
3864 static int __init pg_init(void)
3865 {
3866 int cpu;
3867 struct proc_dir_entry *pe;
3868
3869 pr_info("%s", version);
3870
3871 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3872 if (!pg_proc_dir)
3873 return -ENODEV;
3874
3875 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3876 if (pe == NULL) {
3877 pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL);
3878 proc_net_remove(&init_net, PG_PROC_DIR);
3879 return -EINVAL;
3880 }
3881
3882 /* Register us to receive netdevice events */
3883 register_netdevice_notifier(&pktgen_notifier_block);
3884
3885 for_each_online_cpu(cpu) {
3886 int err;
3887
3888 err = pktgen_create_thread(cpu);
3889 if (err)
3890 pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n",
3891 cpu, err);
3892 }
3893
3894 if (list_empty(&pktgen_threads)) {
3895 pr_err("ERROR: Initialization failed for all threads\n");
3896 unregister_netdevice_notifier(&pktgen_notifier_block);
3897 remove_proc_entry(PGCTRL, pg_proc_dir);
3898 proc_net_remove(&init_net, PG_PROC_DIR);
3899 return -ENODEV;
3900 }
3901
3902 return 0;
3903 }
3904
3905 static void __exit pg_cleanup(void)
3906 {
3907 struct pktgen_thread *t;
3908 struct list_head *q, *n;
3909
3910 /* Stop all interfaces & threads */
3911
3912 list_for_each_safe(q, n, &pktgen_threads) {
3913 t = list_entry(q, struct pktgen_thread, th_list);
3914 kthread_stop(t->tsk);
3915 kfree(t);
3916 }
3917
3918 /* Un-register us from receiving netdevice events */
3919 unregister_netdevice_notifier(&pktgen_notifier_block);
3920
3921 /* Clean up proc file system */
3922 remove_proc_entry(PGCTRL, pg_proc_dir);
3923 proc_net_remove(&init_net, PG_PROC_DIR);
3924 }
3925
3926 module_init(pg_init);
3927 module_exit(pg_cleanup);
3928
3929 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3930 MODULE_DESCRIPTION("Packet Generator tool");
3931 MODULE_LICENSE("GPL");
3932 MODULE_VERSION(VERSION);
3933 module_param(pg_count_d, int, 0);
3934 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3935 module_param(pg_delay_d, int, 0);
3936 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3937 module_param(pg_clone_skb_d, int, 0);
3938 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3939 module_param(debug, int, 0);
3940 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree