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