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Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
[mirror_ubuntu-artful-kernel.git] / net / core / pktgen.c
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 struct page *page;
255 u64 delay; /* nano-seconds */
256
257 __u64 count; /* Default No packets to send */
258 __u64 sofar; /* How many pkts we've sent so far */
259 __u64 tx_bytes; /* How many bytes we've transmitted */
260 __u64 errors; /* Errors when trying to transmit, */
261
262 /* runtime counters relating to clone_skb */
263
264 __u64 allocated_skbs;
265 __u32 clone_count;
266 int last_ok; /* Was last skb sent?
267 * Or a failed transmit of some sort?
268 * This will keep sequence numbers in order
269 */
270 ktime_t next_tx;
271 ktime_t started_at;
272 ktime_t stopped_at;
273 u64 idle_acc; /* nano-seconds */
274
275 __u32 seq_num;
276
277 int clone_skb; /*
278 * Use multiple SKBs during packet gen.
279 * If this number is greater than 1, then
280 * that many copies of the same packet will be
281 * sent before a new packet is allocated.
282 * If you want to send 1024 identical packets
283 * before creating a new packet,
284 * set clone_skb to 1024.
285 */
286
287 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
288 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
289 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
290 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
291
292 struct in6_addr in6_saddr;
293 struct in6_addr in6_daddr;
294 struct in6_addr cur_in6_daddr;
295 struct in6_addr cur_in6_saddr;
296 /* For ranges */
297 struct in6_addr min_in6_daddr;
298 struct in6_addr max_in6_daddr;
299 struct in6_addr min_in6_saddr;
300 struct in6_addr max_in6_saddr;
301
302 /* If we're doing ranges, random or incremental, then this
303 * defines the min/max for those ranges.
304 */
305 __be32 saddr_min; /* inclusive, source IP address */
306 __be32 saddr_max; /* exclusive, source IP address */
307 __be32 daddr_min; /* inclusive, dest IP address */
308 __be32 daddr_max; /* exclusive, dest IP address */
309
310 __u16 udp_src_min; /* inclusive, source UDP port */
311 __u16 udp_src_max; /* exclusive, source UDP port */
312 __u16 udp_dst_min; /* inclusive, dest UDP port */
313 __u16 udp_dst_max; /* exclusive, dest UDP port */
314
315 /* DSCP + ECN */
316 __u8 tos; /* six MSB of (former) IPv4 TOS
317 are for dscp codepoint */
318 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
319 (see RFC 3260, sec. 4) */
320
321 /* MPLS */
322 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
323 __be32 labels[MAX_MPLS_LABELS];
324
325 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
326 __u8 vlan_p;
327 __u8 vlan_cfi;
328 __u16 vlan_id; /* 0xffff means no vlan tag */
329
330 __u8 svlan_p;
331 __u8 svlan_cfi;
332 __u16 svlan_id; /* 0xffff means no svlan tag */
333
334 __u32 src_mac_count; /* How many MACs to iterate through */
335 __u32 dst_mac_count; /* How many MACs to iterate through */
336
337 unsigned char dst_mac[ETH_ALEN];
338 unsigned char src_mac[ETH_ALEN];
339
340 __u32 cur_dst_mac_offset;
341 __u32 cur_src_mac_offset;
342 __be32 cur_saddr;
343 __be32 cur_daddr;
344 __u16 ip_id;
345 __u16 cur_udp_dst;
346 __u16 cur_udp_src;
347 __u16 cur_queue_map;
348 __u32 cur_pkt_size;
349 __u32 last_pkt_size;
350
351 __u8 hh[14];
352 /* = {
353 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
354
355 We fill in SRC address later
356 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
357 0x08, 0x00
358 };
359 */
360 __u16 pad; /* pad out the hh struct to an even 16 bytes */
361
362 struct sk_buff *skb; /* skb we are to transmit next, used for when we
363 * are transmitting the same one multiple times
364 */
365 struct net_device *odev; /* The out-going device.
366 * Note that the device should have it's
367 * pg_info pointer pointing back to this
368 * device.
369 * Set when the user specifies the out-going
370 * device name (not when the inject is
371 * started as it used to do.)
372 */
373 char odevname[32];
374 struct flow_state *flows;
375 unsigned cflows; /* Concurrent flows (config) */
376 unsigned lflow; /* Flow length (config) */
377 unsigned nflows; /* accumulated flows (stats) */
378 unsigned curfl; /* current sequenced flow (state)*/
379
380 u16 queue_map_min;
381 u16 queue_map_max;
382 __u32 skb_priority; /* skb priority field */
383 int node; /* Memory node */
384
385 #ifdef CONFIG_XFRM
386 __u8 ipsmode; /* IPSEC mode (config) */
387 __u8 ipsproto; /* IPSEC type (config) */
388 #endif
389 char result[512];
390 };
391
392 struct pktgen_hdr {
393 __be32 pgh_magic;
394 __be32 seq_num;
395 __be32 tv_sec;
396 __be32 tv_usec;
397 };
398
399 static bool pktgen_exiting __read_mostly;
400
401 struct pktgen_thread {
402 spinlock_t if_lock; /* for list of devices */
403 struct list_head if_list; /* All device here */
404 struct list_head th_list;
405 struct task_struct *tsk;
406 char result[512];
407
408 /* Field for thread to receive "posted" events terminate,
409 stop ifs etc. */
410
411 u32 control;
412 int cpu;
413
414 wait_queue_head_t queue;
415 struct completion start_done;
416 };
417
418 #define REMOVE 1
419 #define FIND 0
420
421 static inline ktime_t ktime_now(void)
422 {
423 struct timespec ts;
424 ktime_get_ts(&ts);
425
426 return timespec_to_ktime(ts);
427 }
428
429 /* This works even if 32 bit because of careful byte order choice */
430 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2)
431 {
432 return cmp1.tv64 < cmp2.tv64;
433 }
434
435 static const char version[] =
436 "Packet Generator for packet performance testing. "
437 "Version: " VERSION "\n";
438
439 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
440 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
441 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
442 const char *ifname, bool exact);
443 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
444 static void pktgen_run_all_threads(void);
445 static void pktgen_reset_all_threads(void);
446 static void pktgen_stop_all_threads_ifs(void);
447
448 static void pktgen_stop(struct pktgen_thread *t);
449 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
450
451 static unsigned int scan_ip6(const char *s, char ip[16]);
452
453 /* Module parameters, defaults. */
454 static int pg_count_d __read_mostly = 1000;
455 static int pg_delay_d __read_mostly;
456 static int pg_clone_skb_d __read_mostly;
457 static int debug __read_mostly;
458
459 static DEFINE_MUTEX(pktgen_thread_lock);
460 static LIST_HEAD(pktgen_threads);
461
462 static struct notifier_block pktgen_notifier_block = {
463 .notifier_call = pktgen_device_event,
464 };
465
466 /*
467 * /proc handling functions
468 *
469 */
470
471 static int pgctrl_show(struct seq_file *seq, void *v)
472 {
473 seq_puts(seq, version);
474 return 0;
475 }
476
477 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
478 size_t count, loff_t *ppos)
479 {
480 int err = 0;
481 char data[128];
482
483 if (!capable(CAP_NET_ADMIN)) {
484 err = -EPERM;
485 goto out;
486 }
487
488 if (count > sizeof(data))
489 count = sizeof(data);
490
491 if (copy_from_user(data, buf, count)) {
492 err = -EFAULT;
493 goto out;
494 }
495 data[count - 1] = 0; /* Make string */
496
497 if (!strcmp(data, "stop"))
498 pktgen_stop_all_threads_ifs();
499
500 else if (!strcmp(data, "start"))
501 pktgen_run_all_threads();
502
503 else if (!strcmp(data, "reset"))
504 pktgen_reset_all_threads();
505
506 else
507 pr_warning("Unknown command: %s\n", data);
508
509 err = count;
510
511 out:
512 return err;
513 }
514
515 static int pgctrl_open(struct inode *inode, struct file *file)
516 {
517 return single_open(file, pgctrl_show, PDE(inode)->data);
518 }
519
520 static const struct file_operations pktgen_fops = {
521 .owner = THIS_MODULE,
522 .open = pgctrl_open,
523 .read = seq_read,
524 .llseek = seq_lseek,
525 .write = pgctrl_write,
526 .release = single_release,
527 };
528
529 static int pktgen_if_show(struct seq_file *seq, void *v)
530 {
531 const struct pktgen_dev *pkt_dev = seq->private;
532 ktime_t stopped;
533 u64 idle;
534
535 seq_printf(seq,
536 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
537 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
538 pkt_dev->max_pkt_size);
539
540 seq_printf(seq,
541 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
542 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
543 pkt_dev->clone_skb, pkt_dev->odevname);
544
545 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
546 pkt_dev->lflow);
547
548 seq_printf(seq,
549 " queue_map_min: %u queue_map_max: %u\n",
550 pkt_dev->queue_map_min,
551 pkt_dev->queue_map_max);
552
553 if (pkt_dev->skb_priority)
554 seq_printf(seq, " skb_priority: %u\n",
555 pkt_dev->skb_priority);
556
557 if (pkt_dev->flags & F_IPV6) {
558 seq_printf(seq,
559 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
560 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
561 &pkt_dev->in6_saddr,
562 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
563 &pkt_dev->in6_daddr,
564 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
565 } else {
566 seq_printf(seq,
567 " dst_min: %s dst_max: %s\n",
568 pkt_dev->dst_min, pkt_dev->dst_max);
569 seq_printf(seq,
570 " src_min: %s src_max: %s\n",
571 pkt_dev->src_min, pkt_dev->src_max);
572 }
573
574 seq_puts(seq, " src_mac: ");
575
576 seq_printf(seq, "%pM ",
577 is_zero_ether_addr(pkt_dev->src_mac) ?
578 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
579
580 seq_printf(seq, "dst_mac: ");
581 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
582
583 seq_printf(seq,
584 " udp_src_min: %d udp_src_max: %d"
585 " udp_dst_min: %d udp_dst_max: %d\n",
586 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
587 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
588
589 seq_printf(seq,
590 " src_mac_count: %d dst_mac_count: %d\n",
591 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
592
593 if (pkt_dev->nr_labels) {
594 unsigned i;
595 seq_printf(seq, " mpls: ");
596 for (i = 0; i < pkt_dev->nr_labels; i++)
597 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
598 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
599 }
600
601 if (pkt_dev->vlan_id != 0xffff)
602 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
603 pkt_dev->vlan_id, pkt_dev->vlan_p,
604 pkt_dev->vlan_cfi);
605
606 if (pkt_dev->svlan_id != 0xffff)
607 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
608 pkt_dev->svlan_id, pkt_dev->svlan_p,
609 pkt_dev->svlan_cfi);
610
611 if (pkt_dev->tos)
612 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
613
614 if (pkt_dev->traffic_class)
615 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
616
617 if (pkt_dev->node >= 0)
618 seq_printf(seq, " node: %d\n", pkt_dev->node);
619
620 seq_printf(seq, " Flags: ");
621
622 if (pkt_dev->flags & F_IPV6)
623 seq_printf(seq, "IPV6 ");
624
625 if (pkt_dev->flags & F_IPSRC_RND)
626 seq_printf(seq, "IPSRC_RND ");
627
628 if (pkt_dev->flags & F_IPDST_RND)
629 seq_printf(seq, "IPDST_RND ");
630
631 if (pkt_dev->flags & F_TXSIZE_RND)
632 seq_printf(seq, "TXSIZE_RND ");
633
634 if (pkt_dev->flags & F_UDPSRC_RND)
635 seq_printf(seq, "UDPSRC_RND ");
636
637 if (pkt_dev->flags & F_UDPDST_RND)
638 seq_printf(seq, "UDPDST_RND ");
639
640 if (pkt_dev->flags & F_MPLS_RND)
641 seq_printf(seq, "MPLS_RND ");
642
643 if (pkt_dev->flags & F_QUEUE_MAP_RND)
644 seq_printf(seq, "QUEUE_MAP_RND ");
645
646 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
647 seq_printf(seq, "QUEUE_MAP_CPU ");
648
649 if (pkt_dev->cflows) {
650 if (pkt_dev->flags & F_FLOW_SEQ)
651 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
652 else
653 seq_printf(seq, "FLOW_RND ");
654 }
655
656 #ifdef CONFIG_XFRM
657 if (pkt_dev->flags & F_IPSEC_ON)
658 seq_printf(seq, "IPSEC ");
659 #endif
660
661 if (pkt_dev->flags & F_MACSRC_RND)
662 seq_printf(seq, "MACSRC_RND ");
663
664 if (pkt_dev->flags & F_MACDST_RND)
665 seq_printf(seq, "MACDST_RND ");
666
667 if (pkt_dev->flags & F_VID_RND)
668 seq_printf(seq, "VID_RND ");
669
670 if (pkt_dev->flags & F_SVID_RND)
671 seq_printf(seq, "SVID_RND ");
672
673 if (pkt_dev->flags & F_NODE)
674 seq_printf(seq, "NODE_ALLOC ");
675
676 seq_puts(seq, "\n");
677
678 /* not really stopped, more like last-running-at */
679 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at;
680 idle = pkt_dev->idle_acc;
681 do_div(idle, NSEC_PER_USEC);
682
683 seq_printf(seq,
684 "Current:\n pkts-sofar: %llu errors: %llu\n",
685 (unsigned long long)pkt_dev->sofar,
686 (unsigned long long)pkt_dev->errors);
687
688 seq_printf(seq,
689 " started: %lluus stopped: %lluus idle: %lluus\n",
690 (unsigned long long) ktime_to_us(pkt_dev->started_at),
691 (unsigned long long) ktime_to_us(stopped),
692 (unsigned long long) idle);
693
694 seq_printf(seq,
695 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
696 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
697 pkt_dev->cur_src_mac_offset);
698
699 if (pkt_dev->flags & F_IPV6) {
700 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
701 &pkt_dev->cur_in6_saddr,
702 &pkt_dev->cur_in6_daddr);
703 } else
704 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
705 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
706
707 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
708 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
709
710 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
711
712 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
713
714 if (pkt_dev->result[0])
715 seq_printf(seq, "Result: %s\n", pkt_dev->result);
716 else
717 seq_printf(seq, "Result: Idle\n");
718
719 return 0;
720 }
721
722
723 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
724 __u32 *num)
725 {
726 int i = 0;
727 *num = 0;
728
729 for (; i < maxlen; i++) {
730 int value;
731 char c;
732 *num <<= 4;
733 if (get_user(c, &user_buffer[i]))
734 return -EFAULT;
735 value = hex_to_bin(c);
736 if (value >= 0)
737 *num |= value;
738 else
739 break;
740 }
741 return i;
742 }
743
744 static int count_trail_chars(const char __user * user_buffer,
745 unsigned int maxlen)
746 {
747 int i;
748
749 for (i = 0; i < maxlen; i++) {
750 char c;
751 if (get_user(c, &user_buffer[i]))
752 return -EFAULT;
753 switch (c) {
754 case '\"':
755 case '\n':
756 case '\r':
757 case '\t':
758 case ' ':
759 case '=':
760 break;
761 default:
762 goto done;
763 }
764 }
765 done:
766 return i;
767 }
768
769 static unsigned long num_arg(const char __user * user_buffer,
770 unsigned long maxlen, unsigned long *num)
771 {
772 int i;
773 *num = 0;
774
775 for (i = 0; i < maxlen; i++) {
776 char c;
777 if (get_user(c, &user_buffer[i]))
778 return -EFAULT;
779 if ((c >= '0') && (c <= '9')) {
780 *num *= 10;
781 *num += c - '0';
782 } else
783 break;
784 }
785 return i;
786 }
787
788 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
789 {
790 int i;
791
792 for (i = 0; i < maxlen; i++) {
793 char c;
794 if (get_user(c, &user_buffer[i]))
795 return -EFAULT;
796 switch (c) {
797 case '\"':
798 case '\n':
799 case '\r':
800 case '\t':
801 case ' ':
802 goto done_str;
803 break;
804 default:
805 break;
806 }
807 }
808 done_str:
809 return i;
810 }
811
812 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
813 {
814 unsigned n = 0;
815 char c;
816 ssize_t i = 0;
817 int len;
818
819 pkt_dev->nr_labels = 0;
820 do {
821 __u32 tmp;
822 len = hex32_arg(&buffer[i], 8, &tmp);
823 if (len <= 0)
824 return len;
825 pkt_dev->labels[n] = htonl(tmp);
826 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
827 pkt_dev->flags |= F_MPLS_RND;
828 i += len;
829 if (get_user(c, &buffer[i]))
830 return -EFAULT;
831 i++;
832 n++;
833 if (n >= MAX_MPLS_LABELS)
834 return -E2BIG;
835 } while (c == ',');
836
837 pkt_dev->nr_labels = n;
838 return i;
839 }
840
841 static ssize_t pktgen_if_write(struct file *file,
842 const char __user * user_buffer, size_t count,
843 loff_t * offset)
844 {
845 struct seq_file *seq = file->private_data;
846 struct pktgen_dev *pkt_dev = seq->private;
847 int i, max, len;
848 char name[16], valstr[32];
849 unsigned long value = 0;
850 char *pg_result = NULL;
851 int tmp = 0;
852 char buf[128];
853
854 pg_result = &(pkt_dev->result[0]);
855
856 if (count < 1) {
857 pr_warning("wrong command format\n");
858 return -EINVAL;
859 }
860
861 max = count;
862 tmp = count_trail_chars(user_buffer, max);
863 if (tmp < 0) {
864 pr_warning("illegal format\n");
865 return tmp;
866 }
867 i = tmp;
868
869 /* Read variable name */
870
871 len = strn_len(&user_buffer[i], sizeof(name) - 1);
872 if (len < 0)
873 return len;
874
875 memset(name, 0, sizeof(name));
876 if (copy_from_user(name, &user_buffer[i], len))
877 return -EFAULT;
878 i += len;
879
880 max = count - i;
881 len = count_trail_chars(&user_buffer[i], max);
882 if (len < 0)
883 return len;
884
885 i += len;
886
887 if (debug) {
888 size_t copy = min_t(size_t, count, 1023);
889 char tb[copy + 1];
890 if (copy_from_user(tb, user_buffer, copy))
891 return -EFAULT;
892 tb[copy] = 0;
893 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name,
894 (unsigned long)count, tb);
895 }
896
897 if (!strcmp(name, "min_pkt_size")) {
898 len = num_arg(&user_buffer[i], 10, &value);
899 if (len < 0)
900 return len;
901
902 i += len;
903 if (value < 14 + 20 + 8)
904 value = 14 + 20 + 8;
905 if (value != pkt_dev->min_pkt_size) {
906 pkt_dev->min_pkt_size = value;
907 pkt_dev->cur_pkt_size = value;
908 }
909 sprintf(pg_result, "OK: min_pkt_size=%u",
910 pkt_dev->min_pkt_size);
911 return count;
912 }
913
914 if (!strcmp(name, "max_pkt_size")) {
915 len = num_arg(&user_buffer[i], 10, &value);
916 if (len < 0)
917 return len;
918
919 i += len;
920 if (value < 14 + 20 + 8)
921 value = 14 + 20 + 8;
922 if (value != pkt_dev->max_pkt_size) {
923 pkt_dev->max_pkt_size = value;
924 pkt_dev->cur_pkt_size = value;
925 }
926 sprintf(pg_result, "OK: max_pkt_size=%u",
927 pkt_dev->max_pkt_size);
928 return count;
929 }
930
931 /* Shortcut for min = max */
932
933 if (!strcmp(name, "pkt_size")) {
934 len = num_arg(&user_buffer[i], 10, &value);
935 if (len < 0)
936 return len;
937
938 i += len;
939 if (value < 14 + 20 + 8)
940 value = 14 + 20 + 8;
941 if (value != pkt_dev->min_pkt_size) {
942 pkt_dev->min_pkt_size = value;
943 pkt_dev->max_pkt_size = value;
944 pkt_dev->cur_pkt_size = value;
945 }
946 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
947 return count;
948 }
949
950 if (!strcmp(name, "debug")) {
951 len = num_arg(&user_buffer[i], 10, &value);
952 if (len < 0)
953 return len;
954
955 i += len;
956 debug = value;
957 sprintf(pg_result, "OK: debug=%u", debug);
958 return count;
959 }
960
961 if (!strcmp(name, "frags")) {
962 len = num_arg(&user_buffer[i], 10, &value);
963 if (len < 0)
964 return len;
965
966 i += len;
967 pkt_dev->nfrags = value;
968 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
969 return count;
970 }
971 if (!strcmp(name, "delay")) {
972 len = num_arg(&user_buffer[i], 10, &value);
973 if (len < 0)
974 return len;
975
976 i += len;
977 if (value == 0x7FFFFFFF)
978 pkt_dev->delay = ULLONG_MAX;
979 else
980 pkt_dev->delay = (u64)value;
981
982 sprintf(pg_result, "OK: delay=%llu",
983 (unsigned long long) pkt_dev->delay);
984 return count;
985 }
986 if (!strcmp(name, "rate")) {
987 len = num_arg(&user_buffer[i], 10, &value);
988 if (len < 0)
989 return len;
990
991 i += len;
992 if (!value)
993 return len;
994 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
995 if (debug)
996 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
997
998 sprintf(pg_result, "OK: rate=%lu", value);
999 return count;
1000 }
1001 if (!strcmp(name, "ratep")) {
1002 len = num_arg(&user_buffer[i], 10, &value);
1003 if (len < 0)
1004 return len;
1005
1006 i += len;
1007 if (!value)
1008 return len;
1009 pkt_dev->delay = NSEC_PER_SEC/value;
1010 if (debug)
1011 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1012
1013 sprintf(pg_result, "OK: rate=%lu", value);
1014 return count;
1015 }
1016 if (!strcmp(name, "udp_src_min")) {
1017 len = num_arg(&user_buffer[i], 10, &value);
1018 if (len < 0)
1019 return len;
1020
1021 i += len;
1022 if (value != pkt_dev->udp_src_min) {
1023 pkt_dev->udp_src_min = value;
1024 pkt_dev->cur_udp_src = value;
1025 }
1026 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1027 return count;
1028 }
1029 if (!strcmp(name, "udp_dst_min")) {
1030 len = num_arg(&user_buffer[i], 10, &value);
1031 if (len < 0)
1032 return len;
1033
1034 i += len;
1035 if (value != pkt_dev->udp_dst_min) {
1036 pkt_dev->udp_dst_min = value;
1037 pkt_dev->cur_udp_dst = value;
1038 }
1039 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1040 return count;
1041 }
1042 if (!strcmp(name, "udp_src_max")) {
1043 len = num_arg(&user_buffer[i], 10, &value);
1044 if (len < 0)
1045 return len;
1046
1047 i += len;
1048 if (value != pkt_dev->udp_src_max) {
1049 pkt_dev->udp_src_max = value;
1050 pkt_dev->cur_udp_src = value;
1051 }
1052 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1053 return count;
1054 }
1055 if (!strcmp(name, "udp_dst_max")) {
1056 len = num_arg(&user_buffer[i], 10, &value);
1057 if (len < 0)
1058 return len;
1059
1060 i += len;
1061 if (value != pkt_dev->udp_dst_max) {
1062 pkt_dev->udp_dst_max = value;
1063 pkt_dev->cur_udp_dst = value;
1064 }
1065 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1066 return count;
1067 }
1068 if (!strcmp(name, "clone_skb")) {
1069 len = num_arg(&user_buffer[i], 10, &value);
1070 if (len < 0)
1071 return len;
1072
1073 i += len;
1074 pkt_dev->clone_skb = value;
1075
1076 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1077 return count;
1078 }
1079 if (!strcmp(name, "count")) {
1080 len = num_arg(&user_buffer[i], 10, &value);
1081 if (len < 0)
1082 return len;
1083
1084 i += len;
1085 pkt_dev->count = value;
1086 sprintf(pg_result, "OK: count=%llu",
1087 (unsigned long long)pkt_dev->count);
1088 return count;
1089 }
1090 if (!strcmp(name, "src_mac_count")) {
1091 len = num_arg(&user_buffer[i], 10, &value);
1092 if (len < 0)
1093 return len;
1094
1095 i += len;
1096 if (pkt_dev->src_mac_count != value) {
1097 pkt_dev->src_mac_count = value;
1098 pkt_dev->cur_src_mac_offset = 0;
1099 }
1100 sprintf(pg_result, "OK: src_mac_count=%d",
1101 pkt_dev->src_mac_count);
1102 return count;
1103 }
1104 if (!strcmp(name, "dst_mac_count")) {
1105 len = num_arg(&user_buffer[i], 10, &value);
1106 if (len < 0)
1107 return len;
1108
1109 i += len;
1110 if (pkt_dev->dst_mac_count != value) {
1111 pkt_dev->dst_mac_count = value;
1112 pkt_dev->cur_dst_mac_offset = 0;
1113 }
1114 sprintf(pg_result, "OK: dst_mac_count=%d",
1115 pkt_dev->dst_mac_count);
1116 return count;
1117 }
1118 if (!strcmp(name, "node")) {
1119 len = num_arg(&user_buffer[i], 10, &value);
1120 if (len < 0)
1121 return len;
1122
1123 i += len;
1124
1125 if (node_possible(value)) {
1126 pkt_dev->node = value;
1127 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1128 if (pkt_dev->page) {
1129 put_page(pkt_dev->page);
1130 pkt_dev->page = NULL;
1131 }
1132 }
1133 else
1134 sprintf(pg_result, "ERROR: node not possible");
1135 return count;
1136 }
1137 if (!strcmp(name, "flag")) {
1138 char f[32];
1139 memset(f, 0, 32);
1140 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1141 if (len < 0)
1142 return len;
1143
1144 if (copy_from_user(f, &user_buffer[i], len))
1145 return -EFAULT;
1146 i += len;
1147 if (strcmp(f, "IPSRC_RND") == 0)
1148 pkt_dev->flags |= F_IPSRC_RND;
1149
1150 else if (strcmp(f, "!IPSRC_RND") == 0)
1151 pkt_dev->flags &= ~F_IPSRC_RND;
1152
1153 else if (strcmp(f, "TXSIZE_RND") == 0)
1154 pkt_dev->flags |= F_TXSIZE_RND;
1155
1156 else if (strcmp(f, "!TXSIZE_RND") == 0)
1157 pkt_dev->flags &= ~F_TXSIZE_RND;
1158
1159 else if (strcmp(f, "IPDST_RND") == 0)
1160 pkt_dev->flags |= F_IPDST_RND;
1161
1162 else if (strcmp(f, "!IPDST_RND") == 0)
1163 pkt_dev->flags &= ~F_IPDST_RND;
1164
1165 else if (strcmp(f, "UDPSRC_RND") == 0)
1166 pkt_dev->flags |= F_UDPSRC_RND;
1167
1168 else if (strcmp(f, "!UDPSRC_RND") == 0)
1169 pkt_dev->flags &= ~F_UDPSRC_RND;
1170
1171 else if (strcmp(f, "UDPDST_RND") == 0)
1172 pkt_dev->flags |= F_UDPDST_RND;
1173
1174 else if (strcmp(f, "!UDPDST_RND") == 0)
1175 pkt_dev->flags &= ~F_UDPDST_RND;
1176
1177 else if (strcmp(f, "MACSRC_RND") == 0)
1178 pkt_dev->flags |= F_MACSRC_RND;
1179
1180 else if (strcmp(f, "!MACSRC_RND") == 0)
1181 pkt_dev->flags &= ~F_MACSRC_RND;
1182
1183 else if (strcmp(f, "MACDST_RND") == 0)
1184 pkt_dev->flags |= F_MACDST_RND;
1185
1186 else if (strcmp(f, "!MACDST_RND") == 0)
1187 pkt_dev->flags &= ~F_MACDST_RND;
1188
1189 else if (strcmp(f, "MPLS_RND") == 0)
1190 pkt_dev->flags |= F_MPLS_RND;
1191
1192 else if (strcmp(f, "!MPLS_RND") == 0)
1193 pkt_dev->flags &= ~F_MPLS_RND;
1194
1195 else if (strcmp(f, "VID_RND") == 0)
1196 pkt_dev->flags |= F_VID_RND;
1197
1198 else if (strcmp(f, "!VID_RND") == 0)
1199 pkt_dev->flags &= ~F_VID_RND;
1200
1201 else if (strcmp(f, "SVID_RND") == 0)
1202 pkt_dev->flags |= F_SVID_RND;
1203
1204 else if (strcmp(f, "!SVID_RND") == 0)
1205 pkt_dev->flags &= ~F_SVID_RND;
1206
1207 else if (strcmp(f, "FLOW_SEQ") == 0)
1208 pkt_dev->flags |= F_FLOW_SEQ;
1209
1210 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1211 pkt_dev->flags |= F_QUEUE_MAP_RND;
1212
1213 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1214 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1215
1216 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1217 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1218
1219 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1220 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1221 #ifdef CONFIG_XFRM
1222 else if (strcmp(f, "IPSEC") == 0)
1223 pkt_dev->flags |= F_IPSEC_ON;
1224 #endif
1225
1226 else if (strcmp(f, "!IPV6") == 0)
1227 pkt_dev->flags &= ~F_IPV6;
1228
1229 else if (strcmp(f, "NODE_ALLOC") == 0)
1230 pkt_dev->flags |= F_NODE;
1231
1232 else if (strcmp(f, "!NODE_ALLOC") == 0)
1233 pkt_dev->flags &= ~F_NODE;
1234
1235 else {
1236 sprintf(pg_result,
1237 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1238 f,
1239 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1240 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n");
1241 return count;
1242 }
1243 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1244 return count;
1245 }
1246 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1247 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1248 if (len < 0)
1249 return len;
1250
1251 if (copy_from_user(buf, &user_buffer[i], len))
1252 return -EFAULT;
1253 buf[len] = 0;
1254 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1255 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1256 strncpy(pkt_dev->dst_min, buf, len);
1257 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1258 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1259 }
1260 if (debug)
1261 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1262 pkt_dev->dst_min);
1263 i += len;
1264 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1265 return count;
1266 }
1267 if (!strcmp(name, "dst_max")) {
1268 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1269 if (len < 0)
1270 return len;
1271
1272
1273 if (copy_from_user(buf, &user_buffer[i], len))
1274 return -EFAULT;
1275
1276 buf[len] = 0;
1277 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1278 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1279 strncpy(pkt_dev->dst_max, buf, len);
1280 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1281 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1282 }
1283 if (debug)
1284 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1285 pkt_dev->dst_max);
1286 i += len;
1287 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1288 return count;
1289 }
1290 if (!strcmp(name, "dst6")) {
1291 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1292 if (len < 0)
1293 return len;
1294
1295 pkt_dev->flags |= F_IPV6;
1296
1297 if (copy_from_user(buf, &user_buffer[i], len))
1298 return -EFAULT;
1299 buf[len] = 0;
1300
1301 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1302 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1303
1304 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1305
1306 if (debug)
1307 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1308
1309 i += len;
1310 sprintf(pg_result, "OK: dst6=%s", buf);
1311 return count;
1312 }
1313 if (!strcmp(name, "dst6_min")) {
1314 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1315 if (len < 0)
1316 return len;
1317
1318 pkt_dev->flags |= F_IPV6;
1319
1320 if (copy_from_user(buf, &user_buffer[i], len))
1321 return -EFAULT;
1322 buf[len] = 0;
1323
1324 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1325 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1326
1327 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1328 &pkt_dev->min_in6_daddr);
1329 if (debug)
1330 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1331
1332 i += len;
1333 sprintf(pg_result, "OK: dst6_min=%s", buf);
1334 return count;
1335 }
1336 if (!strcmp(name, "dst6_max")) {
1337 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1338 if (len < 0)
1339 return len;
1340
1341 pkt_dev->flags |= F_IPV6;
1342
1343 if (copy_from_user(buf, &user_buffer[i], len))
1344 return -EFAULT;
1345 buf[len] = 0;
1346
1347 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1348 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1349
1350 if (debug)
1351 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1352
1353 i += len;
1354 sprintf(pg_result, "OK: dst6_max=%s", buf);
1355 return count;
1356 }
1357 if (!strcmp(name, "src6")) {
1358 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1359 if (len < 0)
1360 return len;
1361
1362 pkt_dev->flags |= F_IPV6;
1363
1364 if (copy_from_user(buf, &user_buffer[i], len))
1365 return -EFAULT;
1366 buf[len] = 0;
1367
1368 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1369 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1370
1371 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1372
1373 if (debug)
1374 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1375
1376 i += len;
1377 sprintf(pg_result, "OK: src6=%s", buf);
1378 return count;
1379 }
1380 if (!strcmp(name, "src_min")) {
1381 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1382 if (len < 0)
1383 return len;
1384
1385 if (copy_from_user(buf, &user_buffer[i], len))
1386 return -EFAULT;
1387 buf[len] = 0;
1388 if (strcmp(buf, pkt_dev->src_min) != 0) {
1389 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1390 strncpy(pkt_dev->src_min, buf, len);
1391 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1392 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1393 }
1394 if (debug)
1395 printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1396 pkt_dev->src_min);
1397 i += len;
1398 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1399 return count;
1400 }
1401 if (!strcmp(name, "src_max")) {
1402 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1403 if (len < 0)
1404 return len;
1405
1406 if (copy_from_user(buf, &user_buffer[i], len))
1407 return -EFAULT;
1408 buf[len] = 0;
1409 if (strcmp(buf, pkt_dev->src_max) != 0) {
1410 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1411 strncpy(pkt_dev->src_max, buf, len);
1412 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1413 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1414 }
1415 if (debug)
1416 printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1417 pkt_dev->src_max);
1418 i += len;
1419 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1420 return count;
1421 }
1422 if (!strcmp(name, "dst_mac")) {
1423 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1424 if (len < 0)
1425 return len;
1426
1427 memset(valstr, 0, sizeof(valstr));
1428 if (copy_from_user(valstr, &user_buffer[i], len))
1429 return -EFAULT;
1430
1431 if (!mac_pton(valstr, pkt_dev->dst_mac))
1432 return -EINVAL;
1433 /* Set up Dest MAC */
1434 memcpy(&pkt_dev->hh[0], pkt_dev->dst_mac, ETH_ALEN);
1435
1436 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1437 return count;
1438 }
1439 if (!strcmp(name, "src_mac")) {
1440 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1441 if (len < 0)
1442 return len;
1443
1444 memset(valstr, 0, sizeof(valstr));
1445 if (copy_from_user(valstr, &user_buffer[i], len))
1446 return -EFAULT;
1447
1448 if (!mac_pton(valstr, pkt_dev->src_mac))
1449 return -EINVAL;
1450 /* Set up Src MAC */
1451 memcpy(&pkt_dev->hh[6], pkt_dev->src_mac, ETH_ALEN);
1452
1453 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1454 return count;
1455 }
1456
1457 if (!strcmp(name, "clear_counters")) {
1458 pktgen_clear_counters(pkt_dev);
1459 sprintf(pg_result, "OK: Clearing counters.\n");
1460 return count;
1461 }
1462
1463 if (!strcmp(name, "flows")) {
1464 len = num_arg(&user_buffer[i], 10, &value);
1465 if (len < 0)
1466 return len;
1467
1468 i += len;
1469 if (value > MAX_CFLOWS)
1470 value = MAX_CFLOWS;
1471
1472 pkt_dev->cflows = value;
1473 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1474 return count;
1475 }
1476
1477 if (!strcmp(name, "flowlen")) {
1478 len = num_arg(&user_buffer[i], 10, &value);
1479 if (len < 0)
1480 return len;
1481
1482 i += len;
1483 pkt_dev->lflow = value;
1484 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1485 return count;
1486 }
1487
1488 if (!strcmp(name, "queue_map_min")) {
1489 len = num_arg(&user_buffer[i], 5, &value);
1490 if (len < 0)
1491 return len;
1492
1493 i += len;
1494 pkt_dev->queue_map_min = value;
1495 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1496 return count;
1497 }
1498
1499 if (!strcmp(name, "queue_map_max")) {
1500 len = num_arg(&user_buffer[i], 5, &value);
1501 if (len < 0)
1502 return len;
1503
1504 i += len;
1505 pkt_dev->queue_map_max = value;
1506 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1507 return count;
1508 }
1509
1510 if (!strcmp(name, "mpls")) {
1511 unsigned n, cnt;
1512
1513 len = get_labels(&user_buffer[i], pkt_dev);
1514 if (len < 0)
1515 return len;
1516 i += len;
1517 cnt = sprintf(pg_result, "OK: mpls=");
1518 for (n = 0; n < pkt_dev->nr_labels; n++)
1519 cnt += sprintf(pg_result + cnt,
1520 "%08x%s", ntohl(pkt_dev->labels[n]),
1521 n == pkt_dev->nr_labels-1 ? "" : ",");
1522
1523 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1524 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1525 pkt_dev->svlan_id = 0xffff;
1526
1527 if (debug)
1528 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1529 }
1530 return count;
1531 }
1532
1533 if (!strcmp(name, "vlan_id")) {
1534 len = num_arg(&user_buffer[i], 4, &value);
1535 if (len < 0)
1536 return len;
1537
1538 i += len;
1539 if (value <= 4095) {
1540 pkt_dev->vlan_id = value; /* turn on VLAN */
1541
1542 if (debug)
1543 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1544
1545 if (debug && pkt_dev->nr_labels)
1546 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1547
1548 pkt_dev->nr_labels = 0; /* turn off MPLS */
1549 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1550 } else {
1551 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1552 pkt_dev->svlan_id = 0xffff;
1553
1554 if (debug)
1555 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1556 }
1557 return count;
1558 }
1559
1560 if (!strcmp(name, "vlan_p")) {
1561 len = num_arg(&user_buffer[i], 1, &value);
1562 if (len < 0)
1563 return len;
1564
1565 i += len;
1566 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1567 pkt_dev->vlan_p = value;
1568 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1569 } else {
1570 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1571 }
1572 return count;
1573 }
1574
1575 if (!strcmp(name, "vlan_cfi")) {
1576 len = num_arg(&user_buffer[i], 1, &value);
1577 if (len < 0)
1578 return len;
1579
1580 i += len;
1581 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1582 pkt_dev->vlan_cfi = value;
1583 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1584 } else {
1585 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1586 }
1587 return count;
1588 }
1589
1590 if (!strcmp(name, "svlan_id")) {
1591 len = num_arg(&user_buffer[i], 4, &value);
1592 if (len < 0)
1593 return len;
1594
1595 i += len;
1596 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1597 pkt_dev->svlan_id = value; /* turn on SVLAN */
1598
1599 if (debug)
1600 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1601
1602 if (debug && pkt_dev->nr_labels)
1603 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1604
1605 pkt_dev->nr_labels = 0; /* turn off MPLS */
1606 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1607 } else {
1608 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1609 pkt_dev->svlan_id = 0xffff;
1610
1611 if (debug)
1612 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1613 }
1614 return count;
1615 }
1616
1617 if (!strcmp(name, "svlan_p")) {
1618 len = num_arg(&user_buffer[i], 1, &value);
1619 if (len < 0)
1620 return len;
1621
1622 i += len;
1623 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1624 pkt_dev->svlan_p = value;
1625 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1626 } else {
1627 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1628 }
1629 return count;
1630 }
1631
1632 if (!strcmp(name, "svlan_cfi")) {
1633 len = num_arg(&user_buffer[i], 1, &value);
1634 if (len < 0)
1635 return len;
1636
1637 i += len;
1638 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1639 pkt_dev->svlan_cfi = value;
1640 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1641 } else {
1642 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1643 }
1644 return count;
1645 }
1646
1647 if (!strcmp(name, "tos")) {
1648 __u32 tmp_value = 0;
1649 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1650 if (len < 0)
1651 return len;
1652
1653 i += len;
1654 if (len == 2) {
1655 pkt_dev->tos = tmp_value;
1656 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1657 } else {
1658 sprintf(pg_result, "ERROR: tos must be 00-ff");
1659 }
1660 return count;
1661 }
1662
1663 if (!strcmp(name, "traffic_class")) {
1664 __u32 tmp_value = 0;
1665 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1666 if (len < 0)
1667 return len;
1668
1669 i += len;
1670 if (len == 2) {
1671 pkt_dev->traffic_class = tmp_value;
1672 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1673 } else {
1674 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1675 }
1676 return count;
1677 }
1678
1679 if (!strcmp(name, "skb_priority")) {
1680 len = num_arg(&user_buffer[i], 9, &value);
1681 if (len < 0)
1682 return len;
1683
1684 i += len;
1685 pkt_dev->skb_priority = value;
1686 sprintf(pg_result, "OK: skb_priority=%i",
1687 pkt_dev->skb_priority);
1688 return count;
1689 }
1690
1691 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1692 return -EINVAL;
1693 }
1694
1695 static int pktgen_if_open(struct inode *inode, struct file *file)
1696 {
1697 return single_open(file, pktgen_if_show, PDE(inode)->data);
1698 }
1699
1700 static const struct file_operations pktgen_if_fops = {
1701 .owner = THIS_MODULE,
1702 .open = pktgen_if_open,
1703 .read = seq_read,
1704 .llseek = seq_lseek,
1705 .write = pktgen_if_write,
1706 .release = single_release,
1707 };
1708
1709 static int pktgen_thread_show(struct seq_file *seq, void *v)
1710 {
1711 struct pktgen_thread *t = seq->private;
1712 const struct pktgen_dev *pkt_dev;
1713
1714 BUG_ON(!t);
1715
1716 seq_printf(seq, "Running: ");
1717
1718 if_lock(t);
1719 list_for_each_entry(pkt_dev, &t->if_list, list)
1720 if (pkt_dev->running)
1721 seq_printf(seq, "%s ", pkt_dev->odevname);
1722
1723 seq_printf(seq, "\nStopped: ");
1724
1725 list_for_each_entry(pkt_dev, &t->if_list, list)
1726 if (!pkt_dev->running)
1727 seq_printf(seq, "%s ", pkt_dev->odevname);
1728
1729 if (t->result[0])
1730 seq_printf(seq, "\nResult: %s\n", t->result);
1731 else
1732 seq_printf(seq, "\nResult: NA\n");
1733
1734 if_unlock(t);
1735
1736 return 0;
1737 }
1738
1739 static ssize_t pktgen_thread_write(struct file *file,
1740 const char __user * user_buffer,
1741 size_t count, loff_t * offset)
1742 {
1743 struct seq_file *seq = file->private_data;
1744 struct pktgen_thread *t = seq->private;
1745 int i, max, len, ret;
1746 char name[40];
1747 char *pg_result;
1748
1749 if (count < 1) {
1750 // sprintf(pg_result, "Wrong command format");
1751 return -EINVAL;
1752 }
1753
1754 max = count;
1755 len = count_trail_chars(user_buffer, max);
1756 if (len < 0)
1757 return len;
1758
1759 i = len;
1760
1761 /* Read variable name */
1762
1763 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1764 if (len < 0)
1765 return len;
1766
1767 memset(name, 0, sizeof(name));
1768 if (copy_from_user(name, &user_buffer[i], len))
1769 return -EFAULT;
1770 i += len;
1771
1772 max = count - i;
1773 len = count_trail_chars(&user_buffer[i], max);
1774 if (len < 0)
1775 return len;
1776
1777 i += len;
1778
1779 if (debug)
1780 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1781 name, (unsigned long)count);
1782
1783 if (!t) {
1784 pr_err("ERROR: No thread\n");
1785 ret = -EINVAL;
1786 goto out;
1787 }
1788
1789 pg_result = &(t->result[0]);
1790
1791 if (!strcmp(name, "add_device")) {
1792 char f[32];
1793 memset(f, 0, 32);
1794 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1795 if (len < 0) {
1796 ret = len;
1797 goto out;
1798 }
1799 if (copy_from_user(f, &user_buffer[i], len))
1800 return -EFAULT;
1801 i += len;
1802 mutex_lock(&pktgen_thread_lock);
1803 pktgen_add_device(t, f);
1804 mutex_unlock(&pktgen_thread_lock);
1805 ret = count;
1806 sprintf(pg_result, "OK: add_device=%s", f);
1807 goto out;
1808 }
1809
1810 if (!strcmp(name, "rem_device_all")) {
1811 mutex_lock(&pktgen_thread_lock);
1812 t->control |= T_REMDEVALL;
1813 mutex_unlock(&pktgen_thread_lock);
1814 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1815 ret = count;
1816 sprintf(pg_result, "OK: rem_device_all");
1817 goto out;
1818 }
1819
1820 if (!strcmp(name, "max_before_softirq")) {
1821 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1822 ret = count;
1823 goto out;
1824 }
1825
1826 ret = -EINVAL;
1827 out:
1828 return ret;
1829 }
1830
1831 static int pktgen_thread_open(struct inode *inode, struct file *file)
1832 {
1833 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1834 }
1835
1836 static const struct file_operations pktgen_thread_fops = {
1837 .owner = THIS_MODULE,
1838 .open = pktgen_thread_open,
1839 .read = seq_read,
1840 .llseek = seq_lseek,
1841 .write = pktgen_thread_write,
1842 .release = single_release,
1843 };
1844
1845 /* Think find or remove for NN */
1846 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1847 {
1848 struct pktgen_thread *t;
1849 struct pktgen_dev *pkt_dev = NULL;
1850 bool exact = (remove == FIND);
1851
1852 list_for_each_entry(t, &pktgen_threads, th_list) {
1853 pkt_dev = pktgen_find_dev(t, ifname, exact);
1854 if (pkt_dev) {
1855 if (remove) {
1856 if_lock(t);
1857 pkt_dev->removal_mark = 1;
1858 t->control |= T_REMDEV;
1859 if_unlock(t);
1860 }
1861 break;
1862 }
1863 }
1864 return pkt_dev;
1865 }
1866
1867 /*
1868 * mark a device for removal
1869 */
1870 static void pktgen_mark_device(const char *ifname)
1871 {
1872 struct pktgen_dev *pkt_dev = NULL;
1873 const int max_tries = 10, msec_per_try = 125;
1874 int i = 0;
1875
1876 mutex_lock(&pktgen_thread_lock);
1877 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1878
1879 while (1) {
1880
1881 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1882 if (pkt_dev == NULL)
1883 break; /* success */
1884
1885 mutex_unlock(&pktgen_thread_lock);
1886 pr_debug("%s: waiting for %s to disappear....\n",
1887 __func__, ifname);
1888 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1889 mutex_lock(&pktgen_thread_lock);
1890
1891 if (++i >= max_tries) {
1892 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1893 __func__, msec_per_try * i, ifname);
1894 break;
1895 }
1896
1897 }
1898
1899 mutex_unlock(&pktgen_thread_lock);
1900 }
1901
1902 static void pktgen_change_name(struct net_device *dev)
1903 {
1904 struct pktgen_thread *t;
1905
1906 list_for_each_entry(t, &pktgen_threads, th_list) {
1907 struct pktgen_dev *pkt_dev;
1908
1909 list_for_each_entry(pkt_dev, &t->if_list, list) {
1910 if (pkt_dev->odev != dev)
1911 continue;
1912
1913 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1914
1915 pkt_dev->entry = proc_create_data(dev->name, 0600,
1916 pg_proc_dir,
1917 &pktgen_if_fops,
1918 pkt_dev);
1919 if (!pkt_dev->entry)
1920 pr_err("can't move proc entry for '%s'\n",
1921 dev->name);
1922 break;
1923 }
1924 }
1925 }
1926
1927 static int pktgen_device_event(struct notifier_block *unused,
1928 unsigned long event, void *ptr)
1929 {
1930 struct net_device *dev = ptr;
1931
1932 if (!net_eq(dev_net(dev), &init_net))
1933 return NOTIFY_DONE;
1934
1935 /* It is OK that we do not hold the group lock right now,
1936 * as we run under the RTNL lock.
1937 */
1938
1939 switch (event) {
1940 case NETDEV_CHANGENAME:
1941 pktgen_change_name(dev);
1942 break;
1943
1944 case NETDEV_UNREGISTER:
1945 pktgen_mark_device(dev->name);
1946 break;
1947 }
1948
1949 return NOTIFY_DONE;
1950 }
1951
1952 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev,
1953 const char *ifname)
1954 {
1955 char b[IFNAMSIZ+5];
1956 int i;
1957
1958 for (i = 0; ifname[i] != '@'; i++) {
1959 if (i == IFNAMSIZ)
1960 break;
1961
1962 b[i] = ifname[i];
1963 }
1964 b[i] = 0;
1965
1966 return dev_get_by_name(&init_net, b);
1967 }
1968
1969
1970 /* Associate pktgen_dev with a device. */
1971
1972 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1973 {
1974 struct net_device *odev;
1975 int err;
1976
1977 /* Clean old setups */
1978 if (pkt_dev->odev) {
1979 dev_put(pkt_dev->odev);
1980 pkt_dev->odev = NULL;
1981 }
1982
1983 odev = pktgen_dev_get_by_name(pkt_dev, ifname);
1984 if (!odev) {
1985 pr_err("no such netdevice: \"%s\"\n", ifname);
1986 return -ENODEV;
1987 }
1988
1989 if (odev->type != ARPHRD_ETHER) {
1990 pr_err("not an ethernet device: \"%s\"\n", ifname);
1991 err = -EINVAL;
1992 } else if (!netif_running(odev)) {
1993 pr_err("device is down: \"%s\"\n", ifname);
1994 err = -ENETDOWN;
1995 } else {
1996 pkt_dev->odev = odev;
1997 return 0;
1998 }
1999
2000 dev_put(odev);
2001 return err;
2002 }
2003
2004 /* Read pkt_dev from the interface and set up internal pktgen_dev
2005 * structure to have the right information to create/send packets
2006 */
2007 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2008 {
2009 int ntxq;
2010
2011 if (!pkt_dev->odev) {
2012 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2013 sprintf(pkt_dev->result,
2014 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2015 return;
2016 }
2017
2018 /* make sure that we don't pick a non-existing transmit queue */
2019 ntxq = pkt_dev->odev->real_num_tx_queues;
2020
2021 if (ntxq <= pkt_dev->queue_map_min) {
2022 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2023 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2024 pkt_dev->odevname);
2025 pkt_dev->queue_map_min = ntxq - 1;
2026 }
2027 if (pkt_dev->queue_map_max >= ntxq) {
2028 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2029 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2030 pkt_dev->odevname);
2031 pkt_dev->queue_map_max = ntxq - 1;
2032 }
2033
2034 /* Default to the interface's mac if not explicitly set. */
2035
2036 if (is_zero_ether_addr(pkt_dev->src_mac))
2037 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2038
2039 /* Set up Dest MAC */
2040 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2041
2042 /* Set up pkt size */
2043 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2044
2045 if (pkt_dev->flags & F_IPV6) {
2046 /*
2047 * Skip this automatic address setting until locks or functions
2048 * gets exported
2049 */
2050
2051 #ifdef NOTNOW
2052 int i, set = 0, err = 1;
2053 struct inet6_dev *idev;
2054
2055 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2056 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2057 set = 1;
2058 break;
2059 }
2060
2061 if (!set) {
2062
2063 /*
2064 * Use linklevel address if unconfigured.
2065 *
2066 * use ipv6_get_lladdr if/when it's get exported
2067 */
2068
2069 rcu_read_lock();
2070 idev = __in6_dev_get(pkt_dev->odev);
2071 if (idev) {
2072 struct inet6_ifaddr *ifp;
2073
2074 read_lock_bh(&idev->lock);
2075 for (ifp = idev->addr_list; ifp;
2076 ifp = ifp->if_next) {
2077 if (ifp->scope == IFA_LINK &&
2078 !(ifp->flags & IFA_F_TENTATIVE)) {
2079 ipv6_addr_copy(&pkt_dev->
2080 cur_in6_saddr,
2081 &ifp->addr);
2082 err = 0;
2083 break;
2084 }
2085 }
2086 read_unlock_bh(&idev->lock);
2087 }
2088 rcu_read_unlock();
2089 if (err)
2090 pr_err("ERROR: IPv6 link address not available\n");
2091 }
2092 #endif
2093 } else {
2094 pkt_dev->saddr_min = 0;
2095 pkt_dev->saddr_max = 0;
2096 if (strlen(pkt_dev->src_min) == 0) {
2097
2098 struct in_device *in_dev;
2099
2100 rcu_read_lock();
2101 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2102 if (in_dev) {
2103 if (in_dev->ifa_list) {
2104 pkt_dev->saddr_min =
2105 in_dev->ifa_list->ifa_address;
2106 pkt_dev->saddr_max = pkt_dev->saddr_min;
2107 }
2108 }
2109 rcu_read_unlock();
2110 } else {
2111 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2112 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2113 }
2114
2115 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2116 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2117 }
2118 /* Initialize current values. */
2119 pkt_dev->cur_dst_mac_offset = 0;
2120 pkt_dev->cur_src_mac_offset = 0;
2121 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2122 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2123 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2124 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2125 pkt_dev->nflows = 0;
2126 }
2127
2128
2129 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2130 {
2131 ktime_t start_time, end_time;
2132 s64 remaining;
2133 struct hrtimer_sleeper t;
2134
2135 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2136 hrtimer_set_expires(&t.timer, spin_until);
2137
2138 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2139 if (remaining <= 0) {
2140 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2141 return;
2142 }
2143
2144 start_time = ktime_now();
2145 if (remaining < 100000)
2146 ndelay(remaining); /* really small just spin */
2147 else {
2148 /* see do_nanosleep */
2149 hrtimer_init_sleeper(&t, current);
2150 do {
2151 set_current_state(TASK_INTERRUPTIBLE);
2152 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2153 if (!hrtimer_active(&t.timer))
2154 t.task = NULL;
2155
2156 if (likely(t.task))
2157 schedule();
2158
2159 hrtimer_cancel(&t.timer);
2160 } while (t.task && pkt_dev->running && !signal_pending(current));
2161 __set_current_state(TASK_RUNNING);
2162 }
2163 end_time = ktime_now();
2164
2165 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2166 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2167 }
2168
2169 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2170 {
2171 pkt_dev->pkt_overhead = 0;
2172 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2173 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2174 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2175 }
2176
2177 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2178 {
2179 return !!(pkt_dev->flows[flow].flags & F_INIT);
2180 }
2181
2182 static inline int f_pick(struct pktgen_dev *pkt_dev)
2183 {
2184 int flow = pkt_dev->curfl;
2185
2186 if (pkt_dev->flags & F_FLOW_SEQ) {
2187 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2188 /* reset time */
2189 pkt_dev->flows[flow].count = 0;
2190 pkt_dev->flows[flow].flags = 0;
2191 pkt_dev->curfl += 1;
2192 if (pkt_dev->curfl >= pkt_dev->cflows)
2193 pkt_dev->curfl = 0; /*reset */
2194 }
2195 } else {
2196 flow = random32() % pkt_dev->cflows;
2197 pkt_dev->curfl = flow;
2198
2199 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2200 pkt_dev->flows[flow].count = 0;
2201 pkt_dev->flows[flow].flags = 0;
2202 }
2203 }
2204
2205 return pkt_dev->curfl;
2206 }
2207
2208
2209 #ifdef CONFIG_XFRM
2210 /* If there was already an IPSEC SA, we keep it as is, else
2211 * we go look for it ...
2212 */
2213 #define DUMMY_MARK 0
2214 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2215 {
2216 struct xfrm_state *x = pkt_dev->flows[flow].x;
2217 if (!x) {
2218 /*slow path: we dont already have xfrm_state*/
2219 x = xfrm_stateonly_find(&init_net, DUMMY_MARK,
2220 (xfrm_address_t *)&pkt_dev->cur_daddr,
2221 (xfrm_address_t *)&pkt_dev->cur_saddr,
2222 AF_INET,
2223 pkt_dev->ipsmode,
2224 pkt_dev->ipsproto, 0);
2225 if (x) {
2226 pkt_dev->flows[flow].x = x;
2227 set_pkt_overhead(pkt_dev);
2228 pkt_dev->pkt_overhead += x->props.header_len;
2229 }
2230
2231 }
2232 }
2233 #endif
2234 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2235 {
2236
2237 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2238 pkt_dev->cur_queue_map = smp_processor_id();
2239
2240 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2241 __u16 t;
2242 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2243 t = random32() %
2244 (pkt_dev->queue_map_max -
2245 pkt_dev->queue_map_min + 1)
2246 + pkt_dev->queue_map_min;
2247 } else {
2248 t = pkt_dev->cur_queue_map + 1;
2249 if (t > pkt_dev->queue_map_max)
2250 t = pkt_dev->queue_map_min;
2251 }
2252 pkt_dev->cur_queue_map = t;
2253 }
2254 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2255 }
2256
2257 /* Increment/randomize headers according to flags and current values
2258 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2259 */
2260 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2261 {
2262 __u32 imn;
2263 __u32 imx;
2264 int flow = 0;
2265
2266 if (pkt_dev->cflows)
2267 flow = f_pick(pkt_dev);
2268
2269 /* Deal with source MAC */
2270 if (pkt_dev->src_mac_count > 1) {
2271 __u32 mc;
2272 __u32 tmp;
2273
2274 if (pkt_dev->flags & F_MACSRC_RND)
2275 mc = random32() % pkt_dev->src_mac_count;
2276 else {
2277 mc = pkt_dev->cur_src_mac_offset++;
2278 if (pkt_dev->cur_src_mac_offset >=
2279 pkt_dev->src_mac_count)
2280 pkt_dev->cur_src_mac_offset = 0;
2281 }
2282
2283 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2284 pkt_dev->hh[11] = tmp;
2285 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2286 pkt_dev->hh[10] = tmp;
2287 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2288 pkt_dev->hh[9] = tmp;
2289 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2290 pkt_dev->hh[8] = tmp;
2291 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2292 pkt_dev->hh[7] = tmp;
2293 }
2294
2295 /* Deal with Destination MAC */
2296 if (pkt_dev->dst_mac_count > 1) {
2297 __u32 mc;
2298 __u32 tmp;
2299
2300 if (pkt_dev->flags & F_MACDST_RND)
2301 mc = random32() % pkt_dev->dst_mac_count;
2302
2303 else {
2304 mc = pkt_dev->cur_dst_mac_offset++;
2305 if (pkt_dev->cur_dst_mac_offset >=
2306 pkt_dev->dst_mac_count) {
2307 pkt_dev->cur_dst_mac_offset = 0;
2308 }
2309 }
2310
2311 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2312 pkt_dev->hh[5] = tmp;
2313 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2314 pkt_dev->hh[4] = tmp;
2315 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2316 pkt_dev->hh[3] = tmp;
2317 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2318 pkt_dev->hh[2] = tmp;
2319 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2320 pkt_dev->hh[1] = tmp;
2321 }
2322
2323 if (pkt_dev->flags & F_MPLS_RND) {
2324 unsigned i;
2325 for (i = 0; i < pkt_dev->nr_labels; i++)
2326 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2327 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2328 ((__force __be32)random32() &
2329 htonl(0x000fffff));
2330 }
2331
2332 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2333 pkt_dev->vlan_id = random32() & (4096-1);
2334 }
2335
2336 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2337 pkt_dev->svlan_id = random32() & (4096 - 1);
2338 }
2339
2340 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2341 if (pkt_dev->flags & F_UDPSRC_RND)
2342 pkt_dev->cur_udp_src = random32() %
2343 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2344 + pkt_dev->udp_src_min;
2345
2346 else {
2347 pkt_dev->cur_udp_src++;
2348 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2349 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2350 }
2351 }
2352
2353 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2354 if (pkt_dev->flags & F_UDPDST_RND) {
2355 pkt_dev->cur_udp_dst = random32() %
2356 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2357 + pkt_dev->udp_dst_min;
2358 } else {
2359 pkt_dev->cur_udp_dst++;
2360 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2361 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2362 }
2363 }
2364
2365 if (!(pkt_dev->flags & F_IPV6)) {
2366
2367 imn = ntohl(pkt_dev->saddr_min);
2368 imx = ntohl(pkt_dev->saddr_max);
2369 if (imn < imx) {
2370 __u32 t;
2371 if (pkt_dev->flags & F_IPSRC_RND)
2372 t = random32() % (imx - imn) + imn;
2373 else {
2374 t = ntohl(pkt_dev->cur_saddr);
2375 t++;
2376 if (t > imx)
2377 t = imn;
2378
2379 }
2380 pkt_dev->cur_saddr = htonl(t);
2381 }
2382
2383 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2384 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2385 } else {
2386 imn = ntohl(pkt_dev->daddr_min);
2387 imx = ntohl(pkt_dev->daddr_max);
2388 if (imn < imx) {
2389 __u32 t;
2390 __be32 s;
2391 if (pkt_dev->flags & F_IPDST_RND) {
2392
2393 t = random32() % (imx - imn) + imn;
2394 s = htonl(t);
2395
2396 while (ipv4_is_loopback(s) ||
2397 ipv4_is_multicast(s) ||
2398 ipv4_is_lbcast(s) ||
2399 ipv4_is_zeronet(s) ||
2400 ipv4_is_local_multicast(s)) {
2401 t = random32() % (imx - imn) + imn;
2402 s = htonl(t);
2403 }
2404 pkt_dev->cur_daddr = s;
2405 } else {
2406 t = ntohl(pkt_dev->cur_daddr);
2407 t++;
2408 if (t > imx) {
2409 t = imn;
2410 }
2411 pkt_dev->cur_daddr = htonl(t);
2412 }
2413 }
2414 if (pkt_dev->cflows) {
2415 pkt_dev->flows[flow].flags |= F_INIT;
2416 pkt_dev->flows[flow].cur_daddr =
2417 pkt_dev->cur_daddr;
2418 #ifdef CONFIG_XFRM
2419 if (pkt_dev->flags & F_IPSEC_ON)
2420 get_ipsec_sa(pkt_dev, flow);
2421 #endif
2422 pkt_dev->nflows++;
2423 }
2424 }
2425 } else { /* IPV6 * */
2426
2427 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2428 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2429 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2430 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2431 else {
2432 int i;
2433
2434 /* Only random destinations yet */
2435
2436 for (i = 0; i < 4; i++) {
2437 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2438 (((__force __be32)random32() |
2439 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2440 pkt_dev->max_in6_daddr.s6_addr32[i]);
2441 }
2442 }
2443 }
2444
2445 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2446 __u32 t;
2447 if (pkt_dev->flags & F_TXSIZE_RND) {
2448 t = random32() %
2449 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2450 + pkt_dev->min_pkt_size;
2451 } else {
2452 t = pkt_dev->cur_pkt_size + 1;
2453 if (t > pkt_dev->max_pkt_size)
2454 t = pkt_dev->min_pkt_size;
2455 }
2456 pkt_dev->cur_pkt_size = t;
2457 }
2458
2459 set_cur_queue_map(pkt_dev);
2460
2461 pkt_dev->flows[flow].count++;
2462 }
2463
2464
2465 #ifdef CONFIG_XFRM
2466 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2467 {
2468 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2469 int err = 0;
2470
2471 if (!x)
2472 return 0;
2473 /* XXX: we dont support tunnel mode for now until
2474 * we resolve the dst issue */
2475 if (x->props.mode != XFRM_MODE_TRANSPORT)
2476 return 0;
2477
2478 spin_lock(&x->lock);
2479
2480 err = x->outer_mode->output(x, skb);
2481 if (err)
2482 goto error;
2483 err = x->type->output(x, skb);
2484 if (err)
2485 goto error;
2486
2487 x->curlft.bytes += skb->len;
2488 x->curlft.packets++;
2489 error:
2490 spin_unlock(&x->lock);
2491 return err;
2492 }
2493
2494 static void free_SAs(struct pktgen_dev *pkt_dev)
2495 {
2496 if (pkt_dev->cflows) {
2497 /* let go of the SAs if we have them */
2498 int i;
2499 for (i = 0; i < pkt_dev->cflows; i++) {
2500 struct xfrm_state *x = pkt_dev->flows[i].x;
2501 if (x) {
2502 xfrm_state_put(x);
2503 pkt_dev->flows[i].x = NULL;
2504 }
2505 }
2506 }
2507 }
2508
2509 static int process_ipsec(struct pktgen_dev *pkt_dev,
2510 struct sk_buff *skb, __be16 protocol)
2511 {
2512 if (pkt_dev->flags & F_IPSEC_ON) {
2513 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2514 int nhead = 0;
2515 if (x) {
2516 int ret;
2517 __u8 *eth;
2518 nhead = x->props.header_len - skb_headroom(skb);
2519 if (nhead > 0) {
2520 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2521 if (ret < 0) {
2522 pr_err("Error expanding ipsec packet %d\n",
2523 ret);
2524 goto err;
2525 }
2526 }
2527
2528 /* ipsec is not expecting ll header */
2529 skb_pull(skb, ETH_HLEN);
2530 ret = pktgen_output_ipsec(skb, pkt_dev);
2531 if (ret) {
2532 pr_err("Error creating ipsec packet %d\n", ret);
2533 goto err;
2534 }
2535 /* restore ll */
2536 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2537 memcpy(eth, pkt_dev->hh, 12);
2538 *(u16 *) &eth[12] = protocol;
2539 }
2540 }
2541 return 1;
2542 err:
2543 kfree_skb(skb);
2544 return 0;
2545 }
2546 #endif
2547
2548 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2549 {
2550 unsigned i;
2551 for (i = 0; i < pkt_dev->nr_labels; i++)
2552 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2553
2554 mpls--;
2555 *mpls |= MPLS_STACK_BOTTOM;
2556 }
2557
2558 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2559 unsigned int prio)
2560 {
2561 return htons(id | (cfi << 12) | (prio << 13));
2562 }
2563
2564 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2565 int datalen)
2566 {
2567 struct timeval timestamp;
2568 struct pktgen_hdr *pgh;
2569
2570 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
2571 datalen -= sizeof(*pgh);
2572
2573 if (pkt_dev->nfrags <= 0) {
2574 memset(skb_put(skb, datalen), 0, datalen);
2575 } else {
2576 int frags = pkt_dev->nfrags;
2577 int i, len;
2578 int frag_len;
2579
2580
2581 if (frags > MAX_SKB_FRAGS)
2582 frags = MAX_SKB_FRAGS;
2583 len = datalen - frags * PAGE_SIZE;
2584 if (len > 0) {
2585 memset(skb_put(skb, len), 0, len);
2586 datalen = frags * PAGE_SIZE;
2587 }
2588
2589 i = 0;
2590 frag_len = (datalen/frags) < PAGE_SIZE ?
2591 (datalen/frags) : PAGE_SIZE;
2592 while (datalen > 0) {
2593 if (unlikely(!pkt_dev->page)) {
2594 int node = numa_node_id();
2595
2596 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2597 node = pkt_dev->node;
2598 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2599 if (!pkt_dev->page)
2600 break;
2601 }
2602 skb_shinfo(skb)->frags[i].page = pkt_dev->page;
2603 get_page(pkt_dev->page);
2604 skb_shinfo(skb)->frags[i].page_offset = 0;
2605 /*last fragment, fill rest of data*/
2606 if (i == (frags - 1))
2607 skb_shinfo(skb)->frags[i].size =
2608 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2609 else
2610 skb_shinfo(skb)->frags[i].size = frag_len;
2611 datalen -= skb_shinfo(skb)->frags[i].size;
2612 skb->len += skb_shinfo(skb)->frags[i].size;
2613 skb->data_len += skb_shinfo(skb)->frags[i].size;
2614 i++;
2615 skb_shinfo(skb)->nr_frags = i;
2616 }
2617 }
2618
2619 /* Stamp the time, and sequence number,
2620 * convert them to network byte order
2621 */
2622 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2623 pgh->seq_num = htonl(pkt_dev->seq_num);
2624
2625 do_gettimeofday(&timestamp);
2626 pgh->tv_sec = htonl(timestamp.tv_sec);
2627 pgh->tv_usec = htonl(timestamp.tv_usec);
2628 }
2629
2630 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2631 struct pktgen_dev *pkt_dev)
2632 {
2633 struct sk_buff *skb = NULL;
2634 __u8 *eth;
2635 struct udphdr *udph;
2636 int datalen, iplen;
2637 struct iphdr *iph;
2638 __be16 protocol = htons(ETH_P_IP);
2639 __be32 *mpls;
2640 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2641 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2642 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2643 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2644 u16 queue_map;
2645
2646 if (pkt_dev->nr_labels)
2647 protocol = htons(ETH_P_MPLS_UC);
2648
2649 if (pkt_dev->vlan_id != 0xffff)
2650 protocol = htons(ETH_P_8021Q);
2651
2652 /* Update any of the values, used when we're incrementing various
2653 * fields.
2654 */
2655 mod_cur_headers(pkt_dev);
2656 queue_map = pkt_dev->cur_queue_map;
2657
2658 datalen = (odev->hard_header_len + 16) & ~0xf;
2659
2660 if (pkt_dev->flags & F_NODE) {
2661 int node;
2662
2663 if (pkt_dev->node >= 0)
2664 node = pkt_dev->node;
2665 else
2666 node = numa_node_id();
2667
2668 skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64
2669 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node);
2670 if (likely(skb)) {
2671 skb_reserve(skb, NET_SKB_PAD);
2672 skb->dev = odev;
2673 }
2674 }
2675 else
2676 skb = __netdev_alloc_skb(odev,
2677 pkt_dev->cur_pkt_size + 64
2678 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2679
2680 if (!skb) {
2681 sprintf(pkt_dev->result, "No memory");
2682 return NULL;
2683 }
2684 prefetchw(skb->data);
2685
2686 skb_reserve(skb, datalen);
2687
2688 /* Reserve for ethernet and IP header */
2689 eth = (__u8 *) skb_push(skb, 14);
2690 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2691 if (pkt_dev->nr_labels)
2692 mpls_push(mpls, pkt_dev);
2693
2694 if (pkt_dev->vlan_id != 0xffff) {
2695 if (pkt_dev->svlan_id != 0xffff) {
2696 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2697 *svlan_tci = build_tci(pkt_dev->svlan_id,
2698 pkt_dev->svlan_cfi,
2699 pkt_dev->svlan_p);
2700 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2701 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2702 }
2703 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2704 *vlan_tci = build_tci(pkt_dev->vlan_id,
2705 pkt_dev->vlan_cfi,
2706 pkt_dev->vlan_p);
2707 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2708 *vlan_encapsulated_proto = htons(ETH_P_IP);
2709 }
2710
2711 skb->network_header = skb->tail;
2712 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2713 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2714 skb_set_queue_mapping(skb, queue_map);
2715 skb->priority = pkt_dev->skb_priority;
2716
2717 iph = ip_hdr(skb);
2718 udph = udp_hdr(skb);
2719
2720 memcpy(eth, pkt_dev->hh, 12);
2721 *(__be16 *) & eth[12] = protocol;
2722
2723 /* Eth + IPh + UDPh + mpls */
2724 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2725 pkt_dev->pkt_overhead;
2726 if (datalen < sizeof(struct pktgen_hdr))
2727 datalen = sizeof(struct pktgen_hdr);
2728
2729 udph->source = htons(pkt_dev->cur_udp_src);
2730 udph->dest = htons(pkt_dev->cur_udp_dst);
2731 udph->len = htons(datalen + 8); /* DATA + udphdr */
2732 udph->check = 0; /* No checksum */
2733
2734 iph->ihl = 5;
2735 iph->version = 4;
2736 iph->ttl = 32;
2737 iph->tos = pkt_dev->tos;
2738 iph->protocol = IPPROTO_UDP; /* UDP */
2739 iph->saddr = pkt_dev->cur_saddr;
2740 iph->daddr = pkt_dev->cur_daddr;
2741 iph->id = htons(pkt_dev->ip_id);
2742 pkt_dev->ip_id++;
2743 iph->frag_off = 0;
2744 iplen = 20 + 8 + datalen;
2745 iph->tot_len = htons(iplen);
2746 iph->check = 0;
2747 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2748 skb->protocol = protocol;
2749 skb->mac_header = (skb->network_header - ETH_HLEN -
2750 pkt_dev->pkt_overhead);
2751 skb->dev = odev;
2752 skb->pkt_type = PACKET_HOST;
2753 pktgen_finalize_skb(pkt_dev, skb, datalen);
2754
2755 #ifdef CONFIG_XFRM
2756 if (!process_ipsec(pkt_dev, skb, protocol))
2757 return NULL;
2758 #endif
2759
2760 return skb;
2761 }
2762
2763 /*
2764 * scan_ip6, fmt_ip taken from dietlibc-0.21
2765 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2766 *
2767 * Slightly modified for kernel.
2768 * Should be candidate for net/ipv4/utils.c
2769 * --ro
2770 */
2771
2772 static unsigned int scan_ip6(const char *s, char ip[16])
2773 {
2774 unsigned int i;
2775 unsigned int len = 0;
2776 unsigned long u;
2777 char suffix[16];
2778 unsigned int prefixlen = 0;
2779 unsigned int suffixlen = 0;
2780 __be32 tmp;
2781 char *pos;
2782
2783 for (i = 0; i < 16; i++)
2784 ip[i] = 0;
2785
2786 for (;;) {
2787 if (*s == ':') {
2788 len++;
2789 if (s[1] == ':') { /* Found "::", skip to part 2 */
2790 s += 2;
2791 len++;
2792 break;
2793 }
2794 s++;
2795 }
2796
2797 u = simple_strtoul(s, &pos, 16);
2798 i = pos - s;
2799 if (!i)
2800 return 0;
2801 if (prefixlen == 12 && s[i] == '.') {
2802
2803 /* the last 4 bytes may be written as IPv4 address */
2804
2805 tmp = in_aton(s);
2806 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2807 return i + len;
2808 }
2809 ip[prefixlen++] = (u >> 8);
2810 ip[prefixlen++] = (u & 255);
2811 s += i;
2812 len += i;
2813 if (prefixlen == 16)
2814 return len;
2815 }
2816
2817 /* part 2, after "::" */
2818 for (;;) {
2819 if (*s == ':') {
2820 if (suffixlen == 0)
2821 break;
2822 s++;
2823 len++;
2824 } else if (suffixlen != 0)
2825 break;
2826
2827 u = simple_strtol(s, &pos, 16);
2828 i = pos - s;
2829 if (!i) {
2830 if (*s)
2831 len--;
2832 break;
2833 }
2834 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2835 tmp = in_aton(s);
2836 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2837 sizeof(tmp));
2838 suffixlen += 4;
2839 len += strlen(s);
2840 break;
2841 }
2842 suffix[suffixlen++] = (u >> 8);
2843 suffix[suffixlen++] = (u & 255);
2844 s += i;
2845 len += i;
2846 if (prefixlen + suffixlen == 16)
2847 break;
2848 }
2849 for (i = 0; i < suffixlen; i++)
2850 ip[16 - suffixlen + i] = suffix[i];
2851 return len;
2852 }
2853
2854 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2855 struct pktgen_dev *pkt_dev)
2856 {
2857 struct sk_buff *skb = NULL;
2858 __u8 *eth;
2859 struct udphdr *udph;
2860 int datalen;
2861 struct ipv6hdr *iph;
2862 __be16 protocol = htons(ETH_P_IPV6);
2863 __be32 *mpls;
2864 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2865 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2866 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2867 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2868 u16 queue_map;
2869
2870 if (pkt_dev->nr_labels)
2871 protocol = htons(ETH_P_MPLS_UC);
2872
2873 if (pkt_dev->vlan_id != 0xffff)
2874 protocol = htons(ETH_P_8021Q);
2875
2876 /* Update any of the values, used when we're incrementing various
2877 * fields.
2878 */
2879 mod_cur_headers(pkt_dev);
2880 queue_map = pkt_dev->cur_queue_map;
2881
2882 skb = __netdev_alloc_skb(odev,
2883 pkt_dev->cur_pkt_size + 64
2884 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
2885 if (!skb) {
2886 sprintf(pkt_dev->result, "No memory");
2887 return NULL;
2888 }
2889 prefetchw(skb->data);
2890
2891 skb_reserve(skb, 16);
2892
2893 /* Reserve for ethernet and IP header */
2894 eth = (__u8 *) skb_push(skb, 14);
2895 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2896 if (pkt_dev->nr_labels)
2897 mpls_push(mpls, pkt_dev);
2898
2899 if (pkt_dev->vlan_id != 0xffff) {
2900 if (pkt_dev->svlan_id != 0xffff) {
2901 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2902 *svlan_tci = build_tci(pkt_dev->svlan_id,
2903 pkt_dev->svlan_cfi,
2904 pkt_dev->svlan_p);
2905 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2906 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2907 }
2908 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2909 *vlan_tci = build_tci(pkt_dev->vlan_id,
2910 pkt_dev->vlan_cfi,
2911 pkt_dev->vlan_p);
2912 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2913 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2914 }
2915
2916 skb->network_header = skb->tail;
2917 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2918 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2919 skb_set_queue_mapping(skb, queue_map);
2920 skb->priority = pkt_dev->skb_priority;
2921 iph = ipv6_hdr(skb);
2922 udph = udp_hdr(skb);
2923
2924 memcpy(eth, pkt_dev->hh, 12);
2925 *(__be16 *) &eth[12] = protocol;
2926
2927 /* Eth + IPh + UDPh + mpls */
2928 datalen = pkt_dev->cur_pkt_size - 14 -
2929 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2930 pkt_dev->pkt_overhead;
2931
2932 if (datalen < sizeof(struct pktgen_hdr)) {
2933 datalen = sizeof(struct pktgen_hdr);
2934 if (net_ratelimit())
2935 pr_info("increased datalen to %d\n", datalen);
2936 }
2937
2938 udph->source = htons(pkt_dev->cur_udp_src);
2939 udph->dest = htons(pkt_dev->cur_udp_dst);
2940 udph->len = htons(datalen + sizeof(struct udphdr));
2941 udph->check = 0; /* No checksum */
2942
2943 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2944
2945 if (pkt_dev->traffic_class) {
2946 /* Version + traffic class + flow (0) */
2947 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2948 }
2949
2950 iph->hop_limit = 32;
2951
2952 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2953 iph->nexthdr = IPPROTO_UDP;
2954
2955 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2956 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2957
2958 skb->mac_header = (skb->network_header - ETH_HLEN -
2959 pkt_dev->pkt_overhead);
2960 skb->protocol = protocol;
2961 skb->dev = odev;
2962 skb->pkt_type = PACKET_HOST;
2963
2964 pktgen_finalize_skb(pkt_dev, skb, datalen);
2965
2966 return skb;
2967 }
2968
2969 static struct sk_buff *fill_packet(struct net_device *odev,
2970 struct pktgen_dev *pkt_dev)
2971 {
2972 if (pkt_dev->flags & F_IPV6)
2973 return fill_packet_ipv6(odev, pkt_dev);
2974 else
2975 return fill_packet_ipv4(odev, pkt_dev);
2976 }
2977
2978 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2979 {
2980 pkt_dev->seq_num = 1;
2981 pkt_dev->idle_acc = 0;
2982 pkt_dev->sofar = 0;
2983 pkt_dev->tx_bytes = 0;
2984 pkt_dev->errors = 0;
2985 }
2986
2987 /* Set up structure for sending pkts, clear counters */
2988
2989 static void pktgen_run(struct pktgen_thread *t)
2990 {
2991 struct pktgen_dev *pkt_dev;
2992 int started = 0;
2993
2994 func_enter();
2995
2996 if_lock(t);
2997 list_for_each_entry(pkt_dev, &t->if_list, list) {
2998
2999 /*
3000 * setup odev and create initial packet.
3001 */
3002 pktgen_setup_inject(pkt_dev);
3003
3004 if (pkt_dev->odev) {
3005 pktgen_clear_counters(pkt_dev);
3006 pkt_dev->running = 1; /* Cranke yeself! */
3007 pkt_dev->skb = NULL;
3008 pkt_dev->started_at =
3009 pkt_dev->next_tx = ktime_now();
3010
3011 set_pkt_overhead(pkt_dev);
3012
3013 strcpy(pkt_dev->result, "Starting");
3014 started++;
3015 } else
3016 strcpy(pkt_dev->result, "Error starting");
3017 }
3018 if_unlock(t);
3019 if (started)
3020 t->control &= ~(T_STOP);
3021 }
3022
3023 static void pktgen_stop_all_threads_ifs(void)
3024 {
3025 struct pktgen_thread *t;
3026
3027 func_enter();
3028
3029 mutex_lock(&pktgen_thread_lock);
3030
3031 list_for_each_entry(t, &pktgen_threads, th_list)
3032 t->control |= T_STOP;
3033
3034 mutex_unlock(&pktgen_thread_lock);
3035 }
3036
3037 static int thread_is_running(const struct pktgen_thread *t)
3038 {
3039 const struct pktgen_dev *pkt_dev;
3040
3041 list_for_each_entry(pkt_dev, &t->if_list, list)
3042 if (pkt_dev->running)
3043 return 1;
3044 return 0;
3045 }
3046
3047 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3048 {
3049 if_lock(t);
3050
3051 while (thread_is_running(t)) {
3052
3053 if_unlock(t);
3054
3055 msleep_interruptible(100);
3056
3057 if (signal_pending(current))
3058 goto signal;
3059 if_lock(t);
3060 }
3061 if_unlock(t);
3062 return 1;
3063 signal:
3064 return 0;
3065 }
3066
3067 static int pktgen_wait_all_threads_run(void)
3068 {
3069 struct pktgen_thread *t;
3070 int sig = 1;
3071
3072 mutex_lock(&pktgen_thread_lock);
3073
3074 list_for_each_entry(t, &pktgen_threads, th_list) {
3075 sig = pktgen_wait_thread_run(t);
3076 if (sig == 0)
3077 break;
3078 }
3079
3080 if (sig == 0)
3081 list_for_each_entry(t, &pktgen_threads, th_list)
3082 t->control |= (T_STOP);
3083
3084 mutex_unlock(&pktgen_thread_lock);
3085 return sig;
3086 }
3087
3088 static void pktgen_run_all_threads(void)
3089 {
3090 struct pktgen_thread *t;
3091
3092 func_enter();
3093
3094 mutex_lock(&pktgen_thread_lock);
3095
3096 list_for_each_entry(t, &pktgen_threads, th_list)
3097 t->control |= (T_RUN);
3098
3099 mutex_unlock(&pktgen_thread_lock);
3100
3101 /* Propagate thread->control */
3102 schedule_timeout_interruptible(msecs_to_jiffies(125));
3103
3104 pktgen_wait_all_threads_run();
3105 }
3106
3107 static void pktgen_reset_all_threads(void)
3108 {
3109 struct pktgen_thread *t;
3110
3111 func_enter();
3112
3113 mutex_lock(&pktgen_thread_lock);
3114
3115 list_for_each_entry(t, &pktgen_threads, th_list)
3116 t->control |= (T_REMDEVALL);
3117
3118 mutex_unlock(&pktgen_thread_lock);
3119
3120 /* Propagate thread->control */
3121 schedule_timeout_interruptible(msecs_to_jiffies(125));
3122
3123 pktgen_wait_all_threads_run();
3124 }
3125
3126 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3127 {
3128 __u64 bps, mbps, pps;
3129 char *p = pkt_dev->result;
3130 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3131 pkt_dev->started_at);
3132 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3133
3134 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3135 (unsigned long long)ktime_to_us(elapsed),
3136 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3137 (unsigned long long)ktime_to_us(idle),
3138 (unsigned long long)pkt_dev->sofar,
3139 pkt_dev->cur_pkt_size, nr_frags);
3140
3141 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3142 ktime_to_ns(elapsed));
3143
3144 bps = pps * 8 * pkt_dev->cur_pkt_size;
3145
3146 mbps = bps;
3147 do_div(mbps, 1000000);
3148 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3149 (unsigned long long)pps,
3150 (unsigned long long)mbps,
3151 (unsigned long long)bps,
3152 (unsigned long long)pkt_dev->errors);
3153 }
3154
3155 /* Set stopped-at timer, remove from running list, do counters & statistics */
3156 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3157 {
3158 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3159
3160 if (!pkt_dev->running) {
3161 pr_warning("interface: %s is already stopped\n",
3162 pkt_dev->odevname);
3163 return -EINVAL;
3164 }
3165
3166 kfree_skb(pkt_dev->skb);
3167 pkt_dev->skb = NULL;
3168 pkt_dev->stopped_at = ktime_now();
3169 pkt_dev->running = 0;
3170
3171 show_results(pkt_dev, nr_frags);
3172
3173 return 0;
3174 }
3175
3176 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3177 {
3178 struct pktgen_dev *pkt_dev, *best = NULL;
3179
3180 if_lock(t);
3181
3182 list_for_each_entry(pkt_dev, &t->if_list, list) {
3183 if (!pkt_dev->running)
3184 continue;
3185 if (best == NULL)
3186 best = pkt_dev;
3187 else if (ktime_lt(pkt_dev->next_tx, best->next_tx))
3188 best = pkt_dev;
3189 }
3190 if_unlock(t);
3191 return best;
3192 }
3193
3194 static void pktgen_stop(struct pktgen_thread *t)
3195 {
3196 struct pktgen_dev *pkt_dev;
3197
3198 func_enter();
3199
3200 if_lock(t);
3201
3202 list_for_each_entry(pkt_dev, &t->if_list, list) {
3203 pktgen_stop_device(pkt_dev);
3204 }
3205
3206 if_unlock(t);
3207 }
3208
3209 /*
3210 * one of our devices needs to be removed - find it
3211 * and remove it
3212 */
3213 static void pktgen_rem_one_if(struct pktgen_thread *t)
3214 {
3215 struct list_head *q, *n;
3216 struct pktgen_dev *cur;
3217
3218 func_enter();
3219
3220 if_lock(t);
3221
3222 list_for_each_safe(q, n, &t->if_list) {
3223 cur = list_entry(q, struct pktgen_dev, list);
3224
3225 if (!cur->removal_mark)
3226 continue;
3227
3228 kfree_skb(cur->skb);
3229 cur->skb = NULL;
3230
3231 pktgen_remove_device(t, cur);
3232
3233 break;
3234 }
3235
3236 if_unlock(t);
3237 }
3238
3239 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3240 {
3241 struct list_head *q, *n;
3242 struct pktgen_dev *cur;
3243
3244 func_enter();
3245
3246 /* Remove all devices, free mem */
3247
3248 if_lock(t);
3249
3250 list_for_each_safe(q, n, &t->if_list) {
3251 cur = list_entry(q, struct pktgen_dev, list);
3252
3253 kfree_skb(cur->skb);
3254 cur->skb = NULL;
3255
3256 pktgen_remove_device(t, cur);
3257 }
3258
3259 if_unlock(t);
3260 }
3261
3262 static void pktgen_rem_thread(struct pktgen_thread *t)
3263 {
3264 /* Remove from the thread list */
3265
3266 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3267
3268 }
3269
3270 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3271 {
3272 ktime_t idle_start = ktime_now();
3273 schedule();
3274 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3275 }
3276
3277 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3278 {
3279 ktime_t idle_start = ktime_now();
3280
3281 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3282 if (signal_pending(current))
3283 break;
3284
3285 if (need_resched())
3286 pktgen_resched(pkt_dev);
3287 else
3288 cpu_relax();
3289 }
3290 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3291 }
3292
3293 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3294 {
3295 struct net_device *odev = pkt_dev->odev;
3296 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3297 = odev->netdev_ops->ndo_start_xmit;
3298 struct netdev_queue *txq;
3299 u16 queue_map;
3300 int ret;
3301
3302 /* If device is offline, then don't send */
3303 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3304 pktgen_stop_device(pkt_dev);
3305 return;
3306 }
3307
3308 /* This is max DELAY, this has special meaning of
3309 * "never transmit"
3310 */
3311 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3312 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX);
3313 return;
3314 }
3315
3316 /* If no skb or clone count exhausted then get new one */
3317 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3318 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3319 /* build a new pkt */
3320 kfree_skb(pkt_dev->skb);
3321
3322 pkt_dev->skb = fill_packet(odev, pkt_dev);
3323 if (pkt_dev->skb == NULL) {
3324 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3325 schedule();
3326 pkt_dev->clone_count--; /* back out increment, OOM */
3327 return;
3328 }
3329 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3330 pkt_dev->allocated_skbs++;
3331 pkt_dev->clone_count = 0; /* reset counter */
3332 }
3333
3334 if (pkt_dev->delay && pkt_dev->last_ok)
3335 spin(pkt_dev, pkt_dev->next_tx);
3336
3337 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3338 txq = netdev_get_tx_queue(odev, queue_map);
3339
3340 __netif_tx_lock_bh(txq);
3341
3342 if (unlikely(netif_tx_queue_frozen_or_stopped(txq))) {
3343 ret = NETDEV_TX_BUSY;
3344 pkt_dev->last_ok = 0;
3345 goto unlock;
3346 }
3347 atomic_inc(&(pkt_dev->skb->users));
3348 ret = (*xmit)(pkt_dev->skb, odev);
3349
3350 switch (ret) {
3351 case NETDEV_TX_OK:
3352 txq_trans_update(txq);
3353 pkt_dev->last_ok = 1;
3354 pkt_dev->sofar++;
3355 pkt_dev->seq_num++;
3356 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3357 break;
3358 case NET_XMIT_DROP:
3359 case NET_XMIT_CN:
3360 case NET_XMIT_POLICED:
3361 /* skb has been consumed */
3362 pkt_dev->errors++;
3363 break;
3364 default: /* Drivers are not supposed to return other values! */
3365 if (net_ratelimit())
3366 pr_info("%s xmit error: %d\n", pkt_dev->odevname, ret);
3367 pkt_dev->errors++;
3368 /* fallthru */
3369 case NETDEV_TX_LOCKED:
3370 case NETDEV_TX_BUSY:
3371 /* Retry it next time */
3372 atomic_dec(&(pkt_dev->skb->users));
3373 pkt_dev->last_ok = 0;
3374 }
3375 unlock:
3376 __netif_tx_unlock_bh(txq);
3377
3378 /* If pkt_dev->count is zero, then run forever */
3379 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3380 pktgen_wait_for_skb(pkt_dev);
3381
3382 /* Done with this */
3383 pktgen_stop_device(pkt_dev);
3384 }
3385 }
3386
3387 /*
3388 * Main loop of the thread goes here
3389 */
3390
3391 static int pktgen_thread_worker(void *arg)
3392 {
3393 DEFINE_WAIT(wait);
3394 struct pktgen_thread *t = arg;
3395 struct pktgen_dev *pkt_dev = NULL;
3396 int cpu = t->cpu;
3397
3398 BUG_ON(smp_processor_id() != cpu);
3399
3400 init_waitqueue_head(&t->queue);
3401 complete(&t->start_done);
3402
3403 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3404
3405 set_current_state(TASK_INTERRUPTIBLE);
3406
3407 set_freezable();
3408
3409 while (!kthread_should_stop()) {
3410 pkt_dev = next_to_run(t);
3411
3412 if (unlikely(!pkt_dev && t->control == 0)) {
3413 if (pktgen_exiting)
3414 break;
3415 wait_event_interruptible_timeout(t->queue,
3416 t->control != 0,
3417 HZ/10);
3418 try_to_freeze();
3419 continue;
3420 }
3421
3422 __set_current_state(TASK_RUNNING);
3423
3424 if (likely(pkt_dev)) {
3425 pktgen_xmit(pkt_dev);
3426
3427 if (need_resched())
3428 pktgen_resched(pkt_dev);
3429 else
3430 cpu_relax();
3431 }
3432
3433 if (t->control & T_STOP) {
3434 pktgen_stop(t);
3435 t->control &= ~(T_STOP);
3436 }
3437
3438 if (t->control & T_RUN) {
3439 pktgen_run(t);
3440 t->control &= ~(T_RUN);
3441 }
3442
3443 if (t->control & T_REMDEVALL) {
3444 pktgen_rem_all_ifs(t);
3445 t->control &= ~(T_REMDEVALL);
3446 }
3447
3448 if (t->control & T_REMDEV) {
3449 pktgen_rem_one_if(t);
3450 t->control &= ~(T_REMDEV);
3451 }
3452
3453 try_to_freeze();
3454
3455 set_current_state(TASK_INTERRUPTIBLE);
3456 }
3457
3458 pr_debug("%s stopping all device\n", t->tsk->comm);
3459 pktgen_stop(t);
3460
3461 pr_debug("%s removing all device\n", t->tsk->comm);
3462 pktgen_rem_all_ifs(t);
3463
3464 pr_debug("%s removing thread\n", t->tsk->comm);
3465 pktgen_rem_thread(t);
3466
3467 /* Wait for kthread_stop */
3468 while (!kthread_should_stop()) {
3469 set_current_state(TASK_INTERRUPTIBLE);
3470 schedule();
3471 }
3472 __set_current_state(TASK_RUNNING);
3473
3474 return 0;
3475 }
3476
3477 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3478 const char *ifname, bool exact)
3479 {
3480 struct pktgen_dev *p, *pkt_dev = NULL;
3481 size_t len = strlen(ifname);
3482
3483 if_lock(t);
3484 list_for_each_entry(p, &t->if_list, list)
3485 if (strncmp(p->odevname, ifname, len) == 0) {
3486 if (p->odevname[len]) {
3487 if (exact || p->odevname[len] != '@')
3488 continue;
3489 }
3490 pkt_dev = p;
3491 break;
3492 }
3493
3494 if_unlock(t);
3495 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3496 return pkt_dev;
3497 }
3498
3499 /*
3500 * Adds a dev at front of if_list.
3501 */
3502
3503 static int add_dev_to_thread(struct pktgen_thread *t,
3504 struct pktgen_dev *pkt_dev)
3505 {
3506 int rv = 0;
3507
3508 if_lock(t);
3509
3510 if (pkt_dev->pg_thread) {
3511 pr_err("ERROR: already assigned to a thread\n");
3512 rv = -EBUSY;
3513 goto out;
3514 }
3515
3516 list_add(&pkt_dev->list, &t->if_list);
3517 pkt_dev->pg_thread = t;
3518 pkt_dev->running = 0;
3519
3520 out:
3521 if_unlock(t);
3522 return rv;
3523 }
3524
3525 /* Called under thread lock */
3526
3527 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3528 {
3529 struct pktgen_dev *pkt_dev;
3530 int err;
3531 int node = cpu_to_node(t->cpu);
3532
3533 /* We don't allow a device to be on several threads */
3534
3535 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3536 if (pkt_dev) {
3537 pr_err("ERROR: interface already used\n");
3538 return -EBUSY;
3539 }
3540
3541 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3542 if (!pkt_dev)
3543 return -ENOMEM;
3544
3545 strcpy(pkt_dev->odevname, ifname);
3546 pkt_dev->flows = vmalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3547 node);
3548 if (pkt_dev->flows == NULL) {
3549 kfree(pkt_dev);
3550 return -ENOMEM;
3551 }
3552 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3553
3554 pkt_dev->removal_mark = 0;
3555 pkt_dev->min_pkt_size = ETH_ZLEN;
3556 pkt_dev->max_pkt_size = ETH_ZLEN;
3557 pkt_dev->nfrags = 0;
3558 pkt_dev->clone_skb = pg_clone_skb_d;
3559 pkt_dev->delay = pg_delay_d;
3560 pkt_dev->count = pg_count_d;
3561 pkt_dev->sofar = 0;
3562 pkt_dev->udp_src_min = 9; /* sink port */
3563 pkt_dev->udp_src_max = 9;
3564 pkt_dev->udp_dst_min = 9;
3565 pkt_dev->udp_dst_max = 9;
3566
3567 pkt_dev->vlan_p = 0;
3568 pkt_dev->vlan_cfi = 0;
3569 pkt_dev->vlan_id = 0xffff;
3570 pkt_dev->svlan_p = 0;
3571 pkt_dev->svlan_cfi = 0;
3572 pkt_dev->svlan_id = 0xffff;
3573 pkt_dev->node = -1;
3574
3575 err = pktgen_setup_dev(pkt_dev, ifname);
3576 if (err)
3577 goto out1;
3578
3579 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3580 &pktgen_if_fops, pkt_dev);
3581 if (!pkt_dev->entry) {
3582 pr_err("cannot create %s/%s procfs entry\n",
3583 PG_PROC_DIR, ifname);
3584 err = -EINVAL;
3585 goto out2;
3586 }
3587 #ifdef CONFIG_XFRM
3588 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3589 pkt_dev->ipsproto = IPPROTO_ESP;
3590 #endif
3591
3592 return add_dev_to_thread(t, pkt_dev);
3593 out2:
3594 dev_put(pkt_dev->odev);
3595 out1:
3596 #ifdef CONFIG_XFRM
3597 free_SAs(pkt_dev);
3598 #endif
3599 vfree(pkt_dev->flows);
3600 kfree(pkt_dev);
3601 return err;
3602 }
3603
3604 static int __init pktgen_create_thread(int cpu)
3605 {
3606 struct pktgen_thread *t;
3607 struct proc_dir_entry *pe;
3608 struct task_struct *p;
3609
3610 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3611 cpu_to_node(cpu));
3612 if (!t) {
3613 pr_err("ERROR: out of memory, can't create new thread\n");
3614 return -ENOMEM;
3615 }
3616
3617 spin_lock_init(&t->if_lock);
3618 t->cpu = cpu;
3619
3620 INIT_LIST_HEAD(&t->if_list);
3621
3622 list_add_tail(&t->th_list, &pktgen_threads);
3623 init_completion(&t->start_done);
3624
3625 p = kthread_create_on_node(pktgen_thread_worker,
3626 t,
3627 cpu_to_node(cpu),
3628 "kpktgend_%d", cpu);
3629 if (IS_ERR(p)) {
3630 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3631 list_del(&t->th_list);
3632 kfree(t);
3633 return PTR_ERR(p);
3634 }
3635 kthread_bind(p, cpu);
3636 t->tsk = p;
3637
3638 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3639 &pktgen_thread_fops, t);
3640 if (!pe) {
3641 pr_err("cannot create %s/%s procfs entry\n",
3642 PG_PROC_DIR, t->tsk->comm);
3643 kthread_stop(p);
3644 list_del(&t->th_list);
3645 kfree(t);
3646 return -EINVAL;
3647 }
3648
3649 wake_up_process(p);
3650 wait_for_completion(&t->start_done);
3651
3652 return 0;
3653 }
3654
3655 /*
3656 * Removes a device from the thread if_list.
3657 */
3658 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3659 struct pktgen_dev *pkt_dev)
3660 {
3661 struct list_head *q, *n;
3662 struct pktgen_dev *p;
3663
3664 list_for_each_safe(q, n, &t->if_list) {
3665 p = list_entry(q, struct pktgen_dev, list);
3666 if (p == pkt_dev)
3667 list_del(&p->list);
3668 }
3669 }
3670
3671 static int pktgen_remove_device(struct pktgen_thread *t,
3672 struct pktgen_dev *pkt_dev)
3673 {
3674
3675 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3676
3677 if (pkt_dev->running) {
3678 pr_warning("WARNING: trying to remove a running interface, stopping it now\n");
3679 pktgen_stop_device(pkt_dev);
3680 }
3681
3682 /* Dis-associate from the interface */
3683
3684 if (pkt_dev->odev) {
3685 dev_put(pkt_dev->odev);
3686 pkt_dev->odev = NULL;
3687 }
3688
3689 /* And update the thread if_list */
3690
3691 _rem_dev_from_if_list(t, pkt_dev);
3692
3693 if (pkt_dev->entry)
3694 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3695
3696 #ifdef CONFIG_XFRM
3697 free_SAs(pkt_dev);
3698 #endif
3699 vfree(pkt_dev->flows);
3700 if (pkt_dev->page)
3701 put_page(pkt_dev->page);
3702 kfree(pkt_dev);
3703 return 0;
3704 }
3705
3706 static int __init pg_init(void)
3707 {
3708 int cpu;
3709 struct proc_dir_entry *pe;
3710
3711 pr_info("%s", version);
3712
3713 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3714 if (!pg_proc_dir)
3715 return -ENODEV;
3716
3717 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3718 if (pe == NULL) {
3719 pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL);
3720 proc_net_remove(&init_net, PG_PROC_DIR);
3721 return -EINVAL;
3722 }
3723
3724 /* Register us to receive netdevice events */
3725 register_netdevice_notifier(&pktgen_notifier_block);
3726
3727 for_each_online_cpu(cpu) {
3728 int err;
3729
3730 err = pktgen_create_thread(cpu);
3731 if (err)
3732 pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n",
3733 cpu, err);
3734 }
3735
3736 if (list_empty(&pktgen_threads)) {
3737 pr_err("ERROR: Initialization failed for all threads\n");
3738 unregister_netdevice_notifier(&pktgen_notifier_block);
3739 remove_proc_entry(PGCTRL, pg_proc_dir);
3740 proc_net_remove(&init_net, PG_PROC_DIR);
3741 return -ENODEV;
3742 }
3743
3744 return 0;
3745 }
3746
3747 static void __exit pg_cleanup(void)
3748 {
3749 struct pktgen_thread *t;
3750 struct list_head *q, *n;
3751
3752 /* Stop all interfaces & threads */
3753 pktgen_exiting = true;
3754
3755 list_for_each_safe(q, n, &pktgen_threads) {
3756 t = list_entry(q, struct pktgen_thread, th_list);
3757 kthread_stop(t->tsk);
3758 kfree(t);
3759 }
3760
3761 /* Un-register us from receiving netdevice events */
3762 unregister_netdevice_notifier(&pktgen_notifier_block);
3763
3764 /* Clean up proc file system */
3765 remove_proc_entry(PGCTRL, pg_proc_dir);
3766 proc_net_remove(&init_net, PG_PROC_DIR);
3767 }
3768
3769 module_init(pg_init);
3770 module_exit(pg_cleanup);
3771
3772 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3773 MODULE_DESCRIPTION("Packet Generator tool");
3774 MODULE_LICENSE("GPL");
3775 MODULE_VERSION(VERSION);
3776 module_param(pg_count_d, int, 0);
3777 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3778 module_param(pg_delay_d, int, 0);
3779 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3780 module_param(pg_clone_skb_d, int, 0);
3781 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3782 module_param(debug, int, 0);
3783 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
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