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netdev: change transmit to limited range type
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / core / pktgen.c
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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#include <linux/sys.h>
119#include <linux/types.h>
120#include <linux/module.h>
121#include <linux/moduleparam.h>
122#include <linux/kernel.h>
123#include <linux/mutex.h>
124#include <linux/sched.h>
125#include <linux/slab.h>
126#include <linux/vmalloc.h>
127#include <linux/unistd.h>
128#include <linux/string.h>
129#include <linux/ptrace.h>
130#include <linux/errno.h>
131#include <linux/ioport.h>
132#include <linux/interrupt.h>
133#include <linux/capability.h>
134#include <linux/hrtimer.h>
135#include <linux/freezer.h>
136#include <linux/delay.h>
137#include <linux/timer.h>
138#include <linux/list.h>
139#include <linux/init.h>
140#include <linux/skbuff.h>
141#include <linux/netdevice.h>
142#include <linux/inet.h>
143#include <linux/inetdevice.h>
144#include <linux/rtnetlink.h>
145#include <linux/if_arp.h>
146#include <linux/if_vlan.h>
147#include <linux/in.h>
148#include <linux/ip.h>
149#include <linux/ipv6.h>
150#include <linux/udp.h>
151#include <linux/proc_fs.h>
152#include <linux/seq_file.h>
153#include <linux/wait.h>
154#include <linux/etherdevice.h>
155#include <linux/kthread.h>
156#include <net/net_namespace.h>
157#include <net/checksum.h>
158#include <net/ipv6.h>
159#include <net/addrconf.h>
160#ifdef CONFIG_XFRM
161#include <net/xfrm.h>
162#endif
163#include <asm/byteorder.h>
164#include <linux/rcupdate.h>
165#include <linux/bitops.h>
166#include <linux/io.h>
167#include <linux/timex.h>
168#include <linux/uaccess.h>
169#include <asm/dma.h>
170#include <asm/div64.h> /* do_div */
171
172#define VERSION "2.72"
173#define IP_NAME_SZ 32
174#define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
175#define MPLS_STACK_BOTTOM htonl(0x00000100)
176
177/* Device flag bits */
178#define F_IPSRC_RND (1<<0) /* IP-Src Random */
179#define F_IPDST_RND (1<<1) /* IP-Dst Random */
180#define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
181#define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
182#define F_MACSRC_RND (1<<4) /* MAC-Src Random */
183#define F_MACDST_RND (1<<5) /* MAC-Dst Random */
184#define F_TXSIZE_RND (1<<6) /* Transmit size is random */
185#define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
186#define F_MPLS_RND (1<<8) /* Random MPLS labels */
187#define F_VID_RND (1<<9) /* Random VLAN ID */
188#define F_SVID_RND (1<<10) /* Random SVLAN ID */
189#define F_FLOW_SEQ (1<<11) /* Sequential flows */
190#define F_IPSEC_ON (1<<12) /* ipsec on for flows */
191#define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
192#define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
193
194/* Thread control flag bits */
195#define T_TERMINATE (1<<0)
196#define T_STOP (1<<1) /* Stop run */
197#define T_RUN (1<<2) /* Start run */
198#define T_REMDEVALL (1<<3) /* Remove all devs */
199#define T_REMDEV (1<<4) /* Remove one dev */
200
201/* If lock -- can be removed after some work */
202#define if_lock(t) spin_lock(&(t->if_lock));
203#define if_unlock(t) spin_unlock(&(t->if_lock));
204
205/* Used to help with determining the pkts on receive */
206#define PKTGEN_MAGIC 0xbe9be955
207#define PG_PROC_DIR "pktgen"
208#define PGCTRL "pgctrl"
209static struct proc_dir_entry *pg_proc_dir;
210
211#define MAX_CFLOWS 65536
212
213#define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
214#define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
215
216struct flow_state {
217 __be32 cur_daddr;
218 int count;
219#ifdef CONFIG_XFRM
220 struct xfrm_state *x;
221#endif
222 __u32 flags;
223};
224
225/* flow flag bits */
226#define F_INIT (1<<0) /* flow has been initialized */
227
228struct pktgen_dev {
229 /*
230 * Try to keep frequent/infrequent used vars. separated.
231 */
232 struct proc_dir_entry *entry; /* proc file */
233 struct pktgen_thread *pg_thread;/* the owner */
234 struct list_head list; /* chaining in the thread's run-queue */
235
236 int running; /* if false, the test will stop */
237
238 /* If min != max, then we will either do a linear iteration, or
239 * we will do a random selection from within the range.
240 */
241 __u32 flags;
242 int removal_mark; /* non-zero => the device is marked for
243 * removal by worker thread */
244
245 int min_pkt_size; /* = ETH_ZLEN; */
246 int max_pkt_size; /* = ETH_ZLEN; */
247 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
248 int nfrags;
249 u64 delay; /* nano-seconds */
250
251 __u64 count; /* Default No packets to send */
252 __u64 sofar; /* How many pkts we've sent so far */
253 __u64 tx_bytes; /* How many bytes we've transmitted */
254 __u64 errors; /* Errors when trying to transmit,
255 pkts will be re-sent */
256
257 /* runtime counters relating to clone_skb */
258
259 __u64 allocated_skbs;
260 __u32 clone_count;
261 int last_ok; /* Was last skb sent?
262 * Or a failed transmit of some sort?
263 * This will keep sequence numbers in order
264 */
265 ktime_t next_tx;
266 ktime_t started_at;
267 ktime_t stopped_at;
268 u64 idle_acc; /* nano-seconds */
269
270 __u32 seq_num;
271
272 int clone_skb; /*
273 * Use multiple SKBs during packet gen.
274 * If this number is greater than 1, then
275 * that many copies of the same packet will be
276 * sent before a new packet is allocated.
277 * If you want to send 1024 identical packets
278 * before creating a new packet,
279 * set clone_skb to 1024.
280 */
281
282 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
283 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
284 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
285 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
286
287 struct in6_addr in6_saddr;
288 struct in6_addr in6_daddr;
289 struct in6_addr cur_in6_daddr;
290 struct in6_addr cur_in6_saddr;
291 /* For ranges */
292 struct in6_addr min_in6_daddr;
293 struct in6_addr max_in6_daddr;
294 struct in6_addr min_in6_saddr;
295 struct in6_addr max_in6_saddr;
296
297 /* If we're doing ranges, random or incremental, then this
298 * defines the min/max for those ranges.
299 */
300 __be32 saddr_min; /* inclusive, source IP address */
301 __be32 saddr_max; /* exclusive, source IP address */
302 __be32 daddr_min; /* inclusive, dest IP address */
303 __be32 daddr_max; /* exclusive, dest IP address */
304
305 __u16 udp_src_min; /* inclusive, source UDP port */
306 __u16 udp_src_max; /* exclusive, source UDP port */
307 __u16 udp_dst_min; /* inclusive, dest UDP port */
308 __u16 udp_dst_max; /* exclusive, dest UDP port */
309
310 /* DSCP + ECN */
311 __u8 tos; /* six MSB of (former) IPv4 TOS
312 are for dscp codepoint */
313 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
314 (see RFC 3260, sec. 4) */
315
316 /* MPLS */
317 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
318 __be32 labels[MAX_MPLS_LABELS];
319
320 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
321 __u8 vlan_p;
322 __u8 vlan_cfi;
323 __u16 vlan_id; /* 0xffff means no vlan tag */
324
325 __u8 svlan_p;
326 __u8 svlan_cfi;
327 __u16 svlan_id; /* 0xffff means no svlan tag */
328
329 __u32 src_mac_count; /* How many MACs to iterate through */
330 __u32 dst_mac_count; /* How many MACs to iterate through */
331
332 unsigned char dst_mac[ETH_ALEN];
333 unsigned char src_mac[ETH_ALEN];
334
335 __u32 cur_dst_mac_offset;
336 __u32 cur_src_mac_offset;
337 __be32 cur_saddr;
338 __be32 cur_daddr;
339 __u16 cur_udp_dst;
340 __u16 cur_udp_src;
341 __u16 cur_queue_map;
342 __u32 cur_pkt_size;
343
344 __u8 hh[14];
345 /* = {
346 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
347
348 We fill in SRC address later
349 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
350 0x08, 0x00
351 };
352 */
353 __u16 pad; /* pad out the hh struct to an even 16 bytes */
354
355 struct sk_buff *skb; /* skb we are to transmit next, used for when we
356 * are transmitting the same one multiple times
357 */
358 struct net_device *odev; /* The out-going device.
359 * Note that the device should have it's
360 * pg_info pointer pointing back to this
361 * device.
362 * Set when the user specifies the out-going
363 * device name (not when the inject is
364 * started as it used to do.)
365 */
366 struct flow_state *flows;
367 unsigned cflows; /* Concurrent flows (config) */
368 unsigned lflow; /* Flow length (config) */
369 unsigned nflows; /* accumulated flows (stats) */
370 unsigned curfl; /* current sequenced flow (state)*/
371
372 u16 queue_map_min;
373 u16 queue_map_max;
374
375#ifdef CONFIG_XFRM
376 __u8 ipsmode; /* IPSEC mode (config) */
377 __u8 ipsproto; /* IPSEC type (config) */
378#endif
379 char result[512];
380};
381
382struct pktgen_hdr {
383 __be32 pgh_magic;
384 __be32 seq_num;
385 __be32 tv_sec;
386 __be32 tv_usec;
387};
388
389struct pktgen_thread {
390 spinlock_t if_lock; /* for list of devices */
391 struct list_head if_list; /* All device here */
392 struct list_head th_list;
393 struct task_struct *tsk;
394 char result[512];
395
396 /* Field for thread to receive "posted" events terminate,
397 stop ifs etc. */
398
399 u32 control;
400 int cpu;
401
402 wait_queue_head_t queue;
403 struct completion start_done;
404};
405
406#define REMOVE 1
407#define FIND 0
408
409static inline ktime_t ktime_now(void)
410{
411 struct timespec ts;
412 ktime_get_ts(&ts);
413
414 return timespec_to_ktime(ts);
415}
416
417/* This works even if 32 bit because of careful byte order choice */
418static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2)
419{
420 return cmp1.tv64 < cmp2.tv64;
421}
422
423static const char version[] =
424 "pktgen " VERSION ": Packet Generator for packet performance testing.\n";
425
426static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
427static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
428static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
429 const char *ifname);
430static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
431static void pktgen_run_all_threads(void);
432static void pktgen_reset_all_threads(void);
433static void pktgen_stop_all_threads_ifs(void);
434
435static void pktgen_stop(struct pktgen_thread *t);
436static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
437
438static unsigned int scan_ip6(const char *s, char ip[16]);
439static unsigned int fmt_ip6(char *s, const char ip[16]);
440
441/* Module parameters, defaults. */
442static int pg_count_d __read_mostly = 1000;
443static int pg_delay_d __read_mostly;
444static int pg_clone_skb_d __read_mostly;
445static int debug __read_mostly;
446
447static DEFINE_MUTEX(pktgen_thread_lock);
448static LIST_HEAD(pktgen_threads);
449
450static struct notifier_block pktgen_notifier_block = {
451 .notifier_call = pktgen_device_event,
452};
453
454/*
455 * /proc handling functions
456 *
457 */
458
459static int pgctrl_show(struct seq_file *seq, void *v)
460{
461 seq_puts(seq, version);
462 return 0;
463}
464
465static ssize_t pgctrl_write(struct file *file, const char __user *buf,
466 size_t count, loff_t *ppos)
467{
468 int err = 0;
469 char data[128];
470
471 if (!capable(CAP_NET_ADMIN)) {
472 err = -EPERM;
473 goto out;
474 }
475
476 if (count > sizeof(data))
477 count = sizeof(data);
478
479 if (copy_from_user(data, buf, count)) {
480 err = -EFAULT;
481 goto out;
482 }
483 data[count - 1] = 0; /* Make string */
484
485 if (!strcmp(data, "stop"))
486 pktgen_stop_all_threads_ifs();
487
488 else if (!strcmp(data, "start"))
489 pktgen_run_all_threads();
490
491 else if (!strcmp(data, "reset"))
492 pktgen_reset_all_threads();
493
494 else
495 printk(KERN_WARNING "pktgen: Unknown command: %s\n", data);
496
497 err = count;
498
499out:
500 return err;
501}
502
503static int pgctrl_open(struct inode *inode, struct file *file)
504{
505 return single_open(file, pgctrl_show, PDE(inode)->data);
506}
507
508static const struct file_operations pktgen_fops = {
509 .owner = THIS_MODULE,
510 .open = pgctrl_open,
511 .read = seq_read,
512 .llseek = seq_lseek,
513 .write = pgctrl_write,
514 .release = single_release,
515};
516
517static int pktgen_if_show(struct seq_file *seq, void *v)
518{
519 const struct pktgen_dev *pkt_dev = seq->private;
520 ktime_t stopped;
521 u64 idle;
522
523 seq_printf(seq,
524 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
525 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
526 pkt_dev->max_pkt_size);
527
528 seq_printf(seq,
529 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
530 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
531 pkt_dev->clone_skb, pkt_dev->odev->name);
532
533 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
534 pkt_dev->lflow);
535
536 seq_printf(seq,
537 " queue_map_min: %u queue_map_max: %u\n",
538 pkt_dev->queue_map_min,
539 pkt_dev->queue_map_max);
540
541 if (pkt_dev->flags & F_IPV6) {
542 char b1[128], b2[128], b3[128];
543 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
544 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
545 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
546 seq_printf(seq,
547 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
548 b2, b3);
549
550 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
551 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
552 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
553 seq_printf(seq,
554 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
555 b2, b3);
556
557 } else {
558 seq_printf(seq,
559 " dst_min: %s dst_max: %s\n",
560 pkt_dev->dst_min, pkt_dev->dst_max);
561 seq_printf(seq,
562 " src_min: %s src_max: %s\n",
563 pkt_dev->src_min, pkt_dev->src_max);
564 }
565
566 seq_puts(seq, " src_mac: ");
567
568 seq_printf(seq, "%pM ",
569 is_zero_ether_addr(pkt_dev->src_mac) ?
570 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
571
572 seq_printf(seq, "dst_mac: ");
573 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
574
575 seq_printf(seq,
576 " udp_src_min: %d udp_src_max: %d"
577 " udp_dst_min: %d udp_dst_max: %d\n",
578 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
579 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
580
581 seq_printf(seq,
582 " src_mac_count: %d dst_mac_count: %d\n",
583 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
584
585 if (pkt_dev->nr_labels) {
586 unsigned i;
587 seq_printf(seq, " mpls: ");
588 for (i = 0; i < pkt_dev->nr_labels; i++)
589 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
590 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
591 }
592
593 if (pkt_dev->vlan_id != 0xffff)
594 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
595 pkt_dev->vlan_id, pkt_dev->vlan_p,
596 pkt_dev->vlan_cfi);
597
598 if (pkt_dev->svlan_id != 0xffff)
599 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
600 pkt_dev->svlan_id, pkt_dev->svlan_p,
601 pkt_dev->svlan_cfi);
602
603 if (pkt_dev->tos)
604 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
605
606 if (pkt_dev->traffic_class)
607 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
608
609 seq_printf(seq, " Flags: ");
610
611 if (pkt_dev->flags & F_IPV6)
612 seq_printf(seq, "IPV6 ");
613
614 if (pkt_dev->flags & F_IPSRC_RND)
615 seq_printf(seq, "IPSRC_RND ");
616
617 if (pkt_dev->flags & F_IPDST_RND)
618 seq_printf(seq, "IPDST_RND ");
619
620 if (pkt_dev->flags & F_TXSIZE_RND)
621 seq_printf(seq, "TXSIZE_RND ");
622
623 if (pkt_dev->flags & F_UDPSRC_RND)
624 seq_printf(seq, "UDPSRC_RND ");
625
626 if (pkt_dev->flags & F_UDPDST_RND)
627 seq_printf(seq, "UDPDST_RND ");
628
629 if (pkt_dev->flags & F_MPLS_RND)
630 seq_printf(seq, "MPLS_RND ");
631
632 if (pkt_dev->flags & F_QUEUE_MAP_RND)
633 seq_printf(seq, "QUEUE_MAP_RND ");
634
635 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
636 seq_printf(seq, "QUEUE_MAP_CPU ");
637
638 if (pkt_dev->cflows) {
639 if (pkt_dev->flags & F_FLOW_SEQ)
640 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
641 else
642 seq_printf(seq, "FLOW_RND ");
643 }
644
645#ifdef CONFIG_XFRM
646 if (pkt_dev->flags & F_IPSEC_ON)
647 seq_printf(seq, "IPSEC ");
648#endif
649
650 if (pkt_dev->flags & F_MACSRC_RND)
651 seq_printf(seq, "MACSRC_RND ");
652
653 if (pkt_dev->flags & F_MACDST_RND)
654 seq_printf(seq, "MACDST_RND ");
655
656 if (pkt_dev->flags & F_VID_RND)
657 seq_printf(seq, "VID_RND ");
658
659 if (pkt_dev->flags & F_SVID_RND)
660 seq_printf(seq, "SVID_RND ");
661
662 seq_puts(seq, "\n");
663
664 /* not really stopped, more like last-running-at */
665 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at;
666 idle = pkt_dev->idle_acc;
667 do_div(idle, NSEC_PER_USEC);
668
669 seq_printf(seq,
670 "Current:\n pkts-sofar: %llu errors: %llu\n",
671 (unsigned long long)pkt_dev->sofar,
672 (unsigned long long)pkt_dev->errors);
673
674 seq_printf(seq,
675 " started: %lluus stopped: %lluus idle: %lluus\n",
676 (unsigned long long) ktime_to_us(pkt_dev->started_at),
677 (unsigned long long) ktime_to_us(stopped),
678 (unsigned long long) idle);
679
680 seq_printf(seq,
681 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
682 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
683 pkt_dev->cur_src_mac_offset);
684
685 if (pkt_dev->flags & F_IPV6) {
686 char b1[128], b2[128];
687 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
688 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
689 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
690 } else
691 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
692 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
693
694 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
695 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
696
697 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
698
699 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
700
701 if (pkt_dev->result[0])
702 seq_printf(seq, "Result: %s\n", pkt_dev->result);
703 else
704 seq_printf(seq, "Result: Idle\n");
705
706 return 0;
707}
708
709
710static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
711 __u32 *num)
712{
713 int i = 0;
714 *num = 0;
715
716 for (; i < maxlen; i++) {
717 char c;
718 *num <<= 4;
719 if (get_user(c, &user_buffer[i]))
720 return -EFAULT;
721 if ((c >= '0') && (c <= '9'))
722 *num |= c - '0';
723 else if ((c >= 'a') && (c <= 'f'))
724 *num |= c - 'a' + 10;
725 else if ((c >= 'A') && (c <= 'F'))
726 *num |= c - 'A' + 10;
727 else
728 break;
729 }
730 return i;
731}
732
733static int count_trail_chars(const char __user * user_buffer,
734 unsigned int maxlen)
735{
736 int i;
737
738 for (i = 0; i < maxlen; i++) {
739 char c;
740 if (get_user(c, &user_buffer[i]))
741 return -EFAULT;
742 switch (c) {
743 case '\"':
744 case '\n':
745 case '\r':
746 case '\t':
747 case ' ':
748 case '=':
749 break;
750 default:
751 goto done;
752 }
753 }
754done:
755 return i;
756}
757
758static unsigned long num_arg(const char __user * user_buffer,
759 unsigned long maxlen, unsigned long *num)
760{
761 int i = 0;
762 *num = 0;
763
764 for (; i < maxlen; i++) {
765 char c;
766 if (get_user(c, &user_buffer[i]))
767 return -EFAULT;
768 if ((c >= '0') && (c <= '9')) {
769 *num *= 10;
770 *num += c - '0';
771 } else
772 break;
773 }
774 return i;
775}
776
777static int strn_len(const char __user * user_buffer, unsigned int maxlen)
778{
779 int i = 0;
780
781 for (; i < maxlen; i++) {
782 char c;
783 if (get_user(c, &user_buffer[i]))
784 return -EFAULT;
785 switch (c) {
786 case '\"':
787 case '\n':
788 case '\r':
789 case '\t':
790 case ' ':
791 goto done_str;
792 break;
793 default:
794 break;
795 }
796 }
797done_str:
798 return i;
799}
800
801static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
802{
803 unsigned n = 0;
804 char c;
805 ssize_t i = 0;
806 int len;
807
808 pkt_dev->nr_labels = 0;
809 do {
810 __u32 tmp;
811 len = hex32_arg(&buffer[i], 8, &tmp);
812 if (len <= 0)
813 return len;
814 pkt_dev->labels[n] = htonl(tmp);
815 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
816 pkt_dev->flags |= F_MPLS_RND;
817 i += len;
818 if (get_user(c, &buffer[i]))
819 return -EFAULT;
820 i++;
821 n++;
822 if (n >= MAX_MPLS_LABELS)
823 return -E2BIG;
824 } while (c == ',');
825
826 pkt_dev->nr_labels = n;
827 return i;
828}
829
830static ssize_t pktgen_if_write(struct file *file,
831 const char __user * user_buffer, size_t count,
832 loff_t * offset)
833{
834 struct seq_file *seq = (struct seq_file *)file->private_data;
835 struct pktgen_dev *pkt_dev = seq->private;
836 int i = 0, max, len;
837 char name[16], valstr[32];
838 unsigned long value = 0;
839 char *pg_result = NULL;
840 int tmp = 0;
841 char buf[128];
842
843 pg_result = &(pkt_dev->result[0]);
844
845 if (count < 1) {
846 printk(KERN_WARNING "pktgen: wrong command format\n");
847 return -EINVAL;
848 }
849
850 max = count - i;
851 tmp = count_trail_chars(&user_buffer[i], max);
852 if (tmp < 0) {
853 printk(KERN_WARNING "pktgen: illegal format\n");
854 return tmp;
855 }
856 i += tmp;
857
858 /* Read variable name */
859
860 len = strn_len(&user_buffer[i], sizeof(name) - 1);
861 if (len < 0)
862 return len;
863
864 memset(name, 0, sizeof(name));
865 if (copy_from_user(name, &user_buffer[i], len))
866 return -EFAULT;
867 i += len;
868
869 max = count - i;
870 len = count_trail_chars(&user_buffer[i], max);
871 if (len < 0)
872 return len;
873
874 i += len;
875
876 if (debug) {
877 char tb[count + 1];
878 if (copy_from_user(tb, user_buffer, count))
879 return -EFAULT;
880 tb[count] = 0;
881 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name,
882 (unsigned long)count, tb);
883 }
884
885 if (!strcmp(name, "min_pkt_size")) {
886 len = num_arg(&user_buffer[i], 10, &value);
887 if (len < 0)
888 return len;
889
890 i += len;
891 if (value < 14 + 20 + 8)
892 value = 14 + 20 + 8;
893 if (value != pkt_dev->min_pkt_size) {
894 pkt_dev->min_pkt_size = value;
895 pkt_dev->cur_pkt_size = value;
896 }
897 sprintf(pg_result, "OK: min_pkt_size=%u",
898 pkt_dev->min_pkt_size);
899 return count;
900 }
901
902 if (!strcmp(name, "max_pkt_size")) {
903 len = num_arg(&user_buffer[i], 10, &value);
904 if (len < 0)
905 return len;
906
907 i += len;
908 if (value < 14 + 20 + 8)
909 value = 14 + 20 + 8;
910 if (value != pkt_dev->max_pkt_size) {
911 pkt_dev->max_pkt_size = value;
912 pkt_dev->cur_pkt_size = value;
913 }
914 sprintf(pg_result, "OK: max_pkt_size=%u",
915 pkt_dev->max_pkt_size);
916 return count;
917 }
918
919 /* Shortcut for min = max */
920
921 if (!strcmp(name, "pkt_size")) {
922 len = num_arg(&user_buffer[i], 10, &value);
923 if (len < 0)
924 return len;
925
926 i += len;
927 if (value < 14 + 20 + 8)
928 value = 14 + 20 + 8;
929 if (value != pkt_dev->min_pkt_size) {
930 pkt_dev->min_pkt_size = value;
931 pkt_dev->max_pkt_size = value;
932 pkt_dev->cur_pkt_size = value;
933 }
934 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
935 return count;
936 }
937
938 if (!strcmp(name, "debug")) {
939 len = num_arg(&user_buffer[i], 10, &value);
940 if (len < 0)
941 return len;
942
943 i += len;
944 debug = value;
945 sprintf(pg_result, "OK: debug=%u", debug);
946 return count;
947 }
948
949 if (!strcmp(name, "frags")) {
950 len = num_arg(&user_buffer[i], 10, &value);
951 if (len < 0)
952 return len;
953
954 i += len;
955 pkt_dev->nfrags = value;
956 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
957 return count;
958 }
959 if (!strcmp(name, "delay")) {
960 len = num_arg(&user_buffer[i], 10, &value);
961 if (len < 0)
962 return len;
963
964 i += len;
965 if (value == 0x7FFFFFFF)
966 pkt_dev->delay = ULLONG_MAX;
967 else
968 pkt_dev->delay = (u64)value * NSEC_PER_USEC;
969
970 sprintf(pg_result, "OK: delay=%llu",
971 (unsigned long long) pkt_dev->delay);
972 return count;
973 }
974 if (!strcmp(name, "udp_src_min")) {
975 len = num_arg(&user_buffer[i], 10, &value);
976 if (len < 0)
977 return len;
978
979 i += len;
980 if (value != pkt_dev->udp_src_min) {
981 pkt_dev->udp_src_min = value;
982 pkt_dev->cur_udp_src = value;
983 }
984 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
985 return count;
986 }
987 if (!strcmp(name, "udp_dst_min")) {
988 len = num_arg(&user_buffer[i], 10, &value);
989 if (len < 0)
990 return len;
991
992 i += len;
993 if (value != pkt_dev->udp_dst_min) {
994 pkt_dev->udp_dst_min = value;
995 pkt_dev->cur_udp_dst = value;
996 }
997 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
998 return count;
999 }
1000 if (!strcmp(name, "udp_src_max")) {
1001 len = num_arg(&user_buffer[i], 10, &value);
1002 if (len < 0)
1003 return len;
1004
1005 i += len;
1006 if (value != pkt_dev->udp_src_max) {
1007 pkt_dev->udp_src_max = value;
1008 pkt_dev->cur_udp_src = value;
1009 }
1010 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1011 return count;
1012 }
1013 if (!strcmp(name, "udp_dst_max")) {
1014 len = num_arg(&user_buffer[i], 10, &value);
1015 if (len < 0)
1016 return len;
1017
1018 i += len;
1019 if (value != pkt_dev->udp_dst_max) {
1020 pkt_dev->udp_dst_max = value;
1021 pkt_dev->cur_udp_dst = value;
1022 }
1023 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1024 return count;
1025 }
1026 if (!strcmp(name, "clone_skb")) {
1027 len = num_arg(&user_buffer[i], 10, &value);
1028 if (len < 0)
1029 return len;
1030
1031 i += len;
1032 pkt_dev->clone_skb = value;
1033
1034 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1035 return count;
1036 }
1037 if (!strcmp(name, "count")) {
1038 len = num_arg(&user_buffer[i], 10, &value);
1039 if (len < 0)
1040 return len;
1041
1042 i += len;
1043 pkt_dev->count = value;
1044 sprintf(pg_result, "OK: count=%llu",
1045 (unsigned long long)pkt_dev->count);
1046 return count;
1047 }
1048 if (!strcmp(name, "src_mac_count")) {
1049 len = num_arg(&user_buffer[i], 10, &value);
1050 if (len < 0)
1051 return len;
1052
1053 i += len;
1054 if (pkt_dev->src_mac_count != value) {
1055 pkt_dev->src_mac_count = value;
1056 pkt_dev->cur_src_mac_offset = 0;
1057 }
1058 sprintf(pg_result, "OK: src_mac_count=%d",
1059 pkt_dev->src_mac_count);
1060 return count;
1061 }
1062 if (!strcmp(name, "dst_mac_count")) {
1063 len = num_arg(&user_buffer[i], 10, &value);
1064 if (len < 0)
1065 return len;
1066
1067 i += len;
1068 if (pkt_dev->dst_mac_count != value) {
1069 pkt_dev->dst_mac_count = value;
1070 pkt_dev->cur_dst_mac_offset = 0;
1071 }
1072 sprintf(pg_result, "OK: dst_mac_count=%d",
1073 pkt_dev->dst_mac_count);
1074 return count;
1075 }
1076 if (!strcmp(name, "flag")) {
1077 char f[32];
1078 memset(f, 0, 32);
1079 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1080 if (len < 0)
1081 return len;
1082
1083 if (copy_from_user(f, &user_buffer[i], len))
1084 return -EFAULT;
1085 i += len;
1086 if (strcmp(f, "IPSRC_RND") == 0)
1087 pkt_dev->flags |= F_IPSRC_RND;
1088
1089 else if (strcmp(f, "!IPSRC_RND") == 0)
1090 pkt_dev->flags &= ~F_IPSRC_RND;
1091
1092 else if (strcmp(f, "TXSIZE_RND") == 0)
1093 pkt_dev->flags |= F_TXSIZE_RND;
1094
1095 else if (strcmp(f, "!TXSIZE_RND") == 0)
1096 pkt_dev->flags &= ~F_TXSIZE_RND;
1097
1098 else if (strcmp(f, "IPDST_RND") == 0)
1099 pkt_dev->flags |= F_IPDST_RND;
1100
1101 else if (strcmp(f, "!IPDST_RND") == 0)
1102 pkt_dev->flags &= ~F_IPDST_RND;
1103
1104 else if (strcmp(f, "UDPSRC_RND") == 0)
1105 pkt_dev->flags |= F_UDPSRC_RND;
1106
1107 else if (strcmp(f, "!UDPSRC_RND") == 0)
1108 pkt_dev->flags &= ~F_UDPSRC_RND;
1109
1110 else if (strcmp(f, "UDPDST_RND") == 0)
1111 pkt_dev->flags |= F_UDPDST_RND;
1112
1113 else if (strcmp(f, "!UDPDST_RND") == 0)
1114 pkt_dev->flags &= ~F_UDPDST_RND;
1115
1116 else if (strcmp(f, "MACSRC_RND") == 0)
1117 pkt_dev->flags |= F_MACSRC_RND;
1118
1119 else if (strcmp(f, "!MACSRC_RND") == 0)
1120 pkt_dev->flags &= ~F_MACSRC_RND;
1121
1122 else if (strcmp(f, "MACDST_RND") == 0)
1123 pkt_dev->flags |= F_MACDST_RND;
1124
1125 else if (strcmp(f, "!MACDST_RND") == 0)
1126 pkt_dev->flags &= ~F_MACDST_RND;
1127
1128 else if (strcmp(f, "MPLS_RND") == 0)
1129 pkt_dev->flags |= F_MPLS_RND;
1130
1131 else if (strcmp(f, "!MPLS_RND") == 0)
1132 pkt_dev->flags &= ~F_MPLS_RND;
1133
1134 else if (strcmp(f, "VID_RND") == 0)
1135 pkt_dev->flags |= F_VID_RND;
1136
1137 else if (strcmp(f, "!VID_RND") == 0)
1138 pkt_dev->flags &= ~F_VID_RND;
1139
1140 else if (strcmp(f, "SVID_RND") == 0)
1141 pkt_dev->flags |= F_SVID_RND;
1142
1143 else if (strcmp(f, "!SVID_RND") == 0)
1144 pkt_dev->flags &= ~F_SVID_RND;
1145
1146 else if (strcmp(f, "FLOW_SEQ") == 0)
1147 pkt_dev->flags |= F_FLOW_SEQ;
1148
1149 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1150 pkt_dev->flags |= F_QUEUE_MAP_RND;
1151
1152 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1153 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1154
1155 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1156 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1157
1158 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1159 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1160#ifdef CONFIG_XFRM
1161 else if (strcmp(f, "IPSEC") == 0)
1162 pkt_dev->flags |= F_IPSEC_ON;
1163#endif
1164
1165 else if (strcmp(f, "!IPV6") == 0)
1166 pkt_dev->flags &= ~F_IPV6;
1167
1168 else {
1169 sprintf(pg_result,
1170 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1171 f,
1172 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1173 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC\n");
1174 return count;
1175 }
1176 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1177 return count;
1178 }
1179 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1180 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1181 if (len < 0)
1182 return len;
1183
1184 if (copy_from_user(buf, &user_buffer[i], len))
1185 return -EFAULT;
1186 buf[len] = 0;
1187 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1188 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1189 strncpy(pkt_dev->dst_min, buf, len);
1190 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1191 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1192 }
1193 if (debug)
1194 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1195 pkt_dev->dst_min);
1196 i += len;
1197 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1198 return count;
1199 }
1200 if (!strcmp(name, "dst_max")) {
1201 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1202 if (len < 0)
1203 return len;
1204
1205
1206 if (copy_from_user(buf, &user_buffer[i], len))
1207 return -EFAULT;
1208
1209 buf[len] = 0;
1210 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1211 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1212 strncpy(pkt_dev->dst_max, buf, len);
1213 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1214 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1215 }
1216 if (debug)
1217 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1218 pkt_dev->dst_max);
1219 i += len;
1220 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1221 return count;
1222 }
1223 if (!strcmp(name, "dst6")) {
1224 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1225 if (len < 0)
1226 return len;
1227
1228 pkt_dev->flags |= F_IPV6;
1229
1230 if (copy_from_user(buf, &user_buffer[i], len))
1231 return -EFAULT;
1232 buf[len] = 0;
1233
1234 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1235 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1236
1237 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1238
1239 if (debug)
1240 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1241
1242 i += len;
1243 sprintf(pg_result, "OK: dst6=%s", buf);
1244 return count;
1245 }
1246 if (!strcmp(name, "dst6_min")) {
1247 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1248 if (len < 0)
1249 return len;
1250
1251 pkt_dev->flags |= F_IPV6;
1252
1253 if (copy_from_user(buf, &user_buffer[i], len))
1254 return -EFAULT;
1255 buf[len] = 0;
1256
1257 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1258 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1259
1260 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1261 &pkt_dev->min_in6_daddr);
1262 if (debug)
1263 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1264
1265 i += len;
1266 sprintf(pg_result, "OK: dst6_min=%s", buf);
1267 return count;
1268 }
1269 if (!strcmp(name, "dst6_max")) {
1270 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1271 if (len < 0)
1272 return len;
1273
1274 pkt_dev->flags |= F_IPV6;
1275
1276 if (copy_from_user(buf, &user_buffer[i], len))
1277 return -EFAULT;
1278 buf[len] = 0;
1279
1280 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1281 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1282
1283 if (debug)
1284 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1285
1286 i += len;
1287 sprintf(pg_result, "OK: dst6_max=%s", buf);
1288 return count;
1289 }
1290 if (!strcmp(name, "src6")) {
1291 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1292 if (len < 0)
1293 return len;
1294
1295 pkt_dev->flags |= F_IPV6;
1296
1297 if (copy_from_user(buf, &user_buffer[i], len))
1298 return -EFAULT;
1299 buf[len] = 0;
1300
1301 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1302 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1303
1304 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1305
1306 if (debug)
1307 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1308
1309 i += len;
1310 sprintf(pg_result, "OK: src6=%s", buf);
1311 return count;
1312 }
1313 if (!strcmp(name, "src_min")) {
1314 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1315 if (len < 0)
1316 return len;
1317
1318 if (copy_from_user(buf, &user_buffer[i], len))
1319 return -EFAULT;
1320 buf[len] = 0;
1321 if (strcmp(buf, pkt_dev->src_min) != 0) {
1322 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1323 strncpy(pkt_dev->src_min, buf, len);
1324 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1325 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1326 }
1327 if (debug)
1328 printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1329 pkt_dev->src_min);
1330 i += len;
1331 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1332 return count;
1333 }
1334 if (!strcmp(name, "src_max")) {
1335 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1336 if (len < 0)
1337 return len;
1338
1339 if (copy_from_user(buf, &user_buffer[i], len))
1340 return -EFAULT;
1341 buf[len] = 0;
1342 if (strcmp(buf, pkt_dev->src_max) != 0) {
1343 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1344 strncpy(pkt_dev->src_max, buf, len);
1345 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1346 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1347 }
1348 if (debug)
1349 printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1350 pkt_dev->src_max);
1351 i += len;
1352 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1353 return count;
1354 }
1355 if (!strcmp(name, "dst_mac")) {
1356 char *v = valstr;
1357 unsigned char old_dmac[ETH_ALEN];
1358 unsigned char *m = pkt_dev->dst_mac;
1359 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1360
1361 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1362 if (len < 0)
1363 return len;
1364
1365 memset(valstr, 0, sizeof(valstr));
1366 if (copy_from_user(valstr, &user_buffer[i], len))
1367 return -EFAULT;
1368 i += len;
1369
1370 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1371 if (*v >= '0' && *v <= '9') {
1372 *m *= 16;
1373 *m += *v - '0';
1374 }
1375 if (*v >= 'A' && *v <= 'F') {
1376 *m *= 16;
1377 *m += *v - 'A' + 10;
1378 }
1379 if (*v >= 'a' && *v <= 'f') {
1380 *m *= 16;
1381 *m += *v - 'a' + 10;
1382 }
1383 if (*v == ':') {
1384 m++;
1385 *m = 0;
1386 }
1387 }
1388
1389 /* Set up Dest MAC */
1390 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1391 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1392
1393 sprintf(pg_result, "OK: dstmac");
1394 return count;
1395 }
1396 if (!strcmp(name, "src_mac")) {
1397 char *v = valstr;
1398 unsigned char old_smac[ETH_ALEN];
1399 unsigned char *m = pkt_dev->src_mac;
1400
1401 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN);
1402
1403 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1404 if (len < 0)
1405 return len;
1406
1407 memset(valstr, 0, sizeof(valstr));
1408 if (copy_from_user(valstr, &user_buffer[i], len))
1409 return -EFAULT;
1410 i += len;
1411
1412 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1413 if (*v >= '0' && *v <= '9') {
1414 *m *= 16;
1415 *m += *v - '0';
1416 }
1417 if (*v >= 'A' && *v <= 'F') {
1418 *m *= 16;
1419 *m += *v - 'A' + 10;
1420 }
1421 if (*v >= 'a' && *v <= 'f') {
1422 *m *= 16;
1423 *m += *v - 'a' + 10;
1424 }
1425 if (*v == ':') {
1426 m++;
1427 *m = 0;
1428 }
1429 }
1430
1431 /* Set up Src MAC */
1432 if (compare_ether_addr(old_smac, pkt_dev->src_mac))
1433 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN);
1434
1435 sprintf(pg_result, "OK: srcmac");
1436 return count;
1437 }
1438
1439 if (!strcmp(name, "clear_counters")) {
1440 pktgen_clear_counters(pkt_dev);
1441 sprintf(pg_result, "OK: Clearing counters.\n");
1442 return count;
1443 }
1444
1445 if (!strcmp(name, "flows")) {
1446 len = num_arg(&user_buffer[i], 10, &value);
1447 if (len < 0)
1448 return len;
1449
1450 i += len;
1451 if (value > MAX_CFLOWS)
1452 value = MAX_CFLOWS;
1453
1454 pkt_dev->cflows = value;
1455 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1456 return count;
1457 }
1458
1459 if (!strcmp(name, "flowlen")) {
1460 len = num_arg(&user_buffer[i], 10, &value);
1461 if (len < 0)
1462 return len;
1463
1464 i += len;
1465 pkt_dev->lflow = value;
1466 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1467 return count;
1468 }
1469
1470 if (!strcmp(name, "queue_map_min")) {
1471 len = num_arg(&user_buffer[i], 5, &value);
1472 if (len < 0)
1473 return len;
1474
1475 i += len;
1476 pkt_dev->queue_map_min = value;
1477 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1478 return count;
1479 }
1480
1481 if (!strcmp(name, "queue_map_max")) {
1482 len = num_arg(&user_buffer[i], 5, &value);
1483 if (len < 0)
1484 return len;
1485
1486 i += len;
1487 pkt_dev->queue_map_max = value;
1488 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1489 return count;
1490 }
1491
1492 if (!strcmp(name, "mpls")) {
1493 unsigned n, cnt;
1494
1495 len = get_labels(&user_buffer[i], pkt_dev);
1496 if (len < 0)
1497 return len;
1498 i += len;
1499 cnt = sprintf(pg_result, "OK: mpls=");
1500 for (n = 0; n < pkt_dev->nr_labels; n++)
1501 cnt += sprintf(pg_result + cnt,
1502 "%08x%s", ntohl(pkt_dev->labels[n]),
1503 n == pkt_dev->nr_labels-1 ? "" : ",");
1504
1505 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1506 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1507 pkt_dev->svlan_id = 0xffff;
1508
1509 if (debug)
1510 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1511 }
1512 return count;
1513 }
1514
1515 if (!strcmp(name, "vlan_id")) {
1516 len = num_arg(&user_buffer[i], 4, &value);
1517 if (len < 0)
1518 return len;
1519
1520 i += len;
1521 if (value <= 4095) {
1522 pkt_dev->vlan_id = value; /* turn on VLAN */
1523
1524 if (debug)
1525 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1526
1527 if (debug && pkt_dev->nr_labels)
1528 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1529
1530 pkt_dev->nr_labels = 0; /* turn off MPLS */
1531 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1532 } else {
1533 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1534 pkt_dev->svlan_id = 0xffff;
1535
1536 if (debug)
1537 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1538 }
1539 return count;
1540 }
1541
1542 if (!strcmp(name, "vlan_p")) {
1543 len = num_arg(&user_buffer[i], 1, &value);
1544 if (len < 0)
1545 return len;
1546
1547 i += len;
1548 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1549 pkt_dev->vlan_p = value;
1550 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1551 } else {
1552 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1553 }
1554 return count;
1555 }
1556
1557 if (!strcmp(name, "vlan_cfi")) {
1558 len = num_arg(&user_buffer[i], 1, &value);
1559 if (len < 0)
1560 return len;
1561
1562 i += len;
1563 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1564 pkt_dev->vlan_cfi = value;
1565 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1566 } else {
1567 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1568 }
1569 return count;
1570 }
1571
1572 if (!strcmp(name, "svlan_id")) {
1573 len = num_arg(&user_buffer[i], 4, &value);
1574 if (len < 0)
1575 return len;
1576
1577 i += len;
1578 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1579 pkt_dev->svlan_id = value; /* turn on SVLAN */
1580
1581 if (debug)
1582 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1583
1584 if (debug && pkt_dev->nr_labels)
1585 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1586
1587 pkt_dev->nr_labels = 0; /* turn off MPLS */
1588 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1589 } else {
1590 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1591 pkt_dev->svlan_id = 0xffff;
1592
1593 if (debug)
1594 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1595 }
1596 return count;
1597 }
1598
1599 if (!strcmp(name, "svlan_p")) {
1600 len = num_arg(&user_buffer[i], 1, &value);
1601 if (len < 0)
1602 return len;
1603
1604 i += len;
1605 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1606 pkt_dev->svlan_p = value;
1607 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1608 } else {
1609 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1610 }
1611 return count;
1612 }
1613
1614 if (!strcmp(name, "svlan_cfi")) {
1615 len = num_arg(&user_buffer[i], 1, &value);
1616 if (len < 0)
1617 return len;
1618
1619 i += len;
1620 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1621 pkt_dev->svlan_cfi = value;
1622 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1623 } else {
1624 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1625 }
1626 return count;
1627 }
1628
1629 if (!strcmp(name, "tos")) {
1630 __u32 tmp_value = 0;
1631 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1632 if (len < 0)
1633 return len;
1634
1635 i += len;
1636 if (len == 2) {
1637 pkt_dev->tos = tmp_value;
1638 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1639 } else {
1640 sprintf(pg_result, "ERROR: tos must be 00-ff");
1641 }
1642 return count;
1643 }
1644
1645 if (!strcmp(name, "traffic_class")) {
1646 __u32 tmp_value = 0;
1647 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1648 if (len < 0)
1649 return len;
1650
1651 i += len;
1652 if (len == 2) {
1653 pkt_dev->traffic_class = tmp_value;
1654 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1655 } else {
1656 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1657 }
1658 return count;
1659 }
1660
1661 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1662 return -EINVAL;
1663}
1664
1665static int pktgen_if_open(struct inode *inode, struct file *file)
1666{
1667 return single_open(file, pktgen_if_show, PDE(inode)->data);
1668}
1669
1670static const struct file_operations pktgen_if_fops = {
1671 .owner = THIS_MODULE,
1672 .open = pktgen_if_open,
1673 .read = seq_read,
1674 .llseek = seq_lseek,
1675 .write = pktgen_if_write,
1676 .release = single_release,
1677};
1678
1679static int pktgen_thread_show(struct seq_file *seq, void *v)
1680{
1681 struct pktgen_thread *t = seq->private;
1682 const struct pktgen_dev *pkt_dev;
1683
1684 BUG_ON(!t);
1685
1686 seq_printf(seq, "Running: ");
1687
1688 if_lock(t);
1689 list_for_each_entry(pkt_dev, &t->if_list, list)
1690 if (pkt_dev->running)
1691 seq_printf(seq, "%s ", pkt_dev->odev->name);
1692
1693 seq_printf(seq, "\nStopped: ");
1694
1695 list_for_each_entry(pkt_dev, &t->if_list, list)
1696 if (!pkt_dev->running)
1697 seq_printf(seq, "%s ", pkt_dev->odev->name);
1698
1699 if (t->result[0])
1700 seq_printf(seq, "\nResult: %s\n", t->result);
1701 else
1702 seq_printf(seq, "\nResult: NA\n");
1703
1704 if_unlock(t);
1705
1706 return 0;
1707}
1708
1709static ssize_t pktgen_thread_write(struct file *file,
1710 const char __user * user_buffer,
1711 size_t count, loff_t * offset)
1712{
1713 struct seq_file *seq = (struct seq_file *)file->private_data;
1714 struct pktgen_thread *t = seq->private;
1715 int i = 0, max, len, ret;
1716 char name[40];
1717 char *pg_result;
1718
1719 if (count < 1) {
1720 // sprintf(pg_result, "Wrong command format");
1721 return -EINVAL;
1722 }
1723
1724 max = count - i;
1725 len = count_trail_chars(&user_buffer[i], max);
1726 if (len < 0)
1727 return len;
1728
1729 i += len;
1730
1731 /* Read variable name */
1732
1733 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1734 if (len < 0)
1735 return len;
1736
1737 memset(name, 0, sizeof(name));
1738 if (copy_from_user(name, &user_buffer[i], len))
1739 return -EFAULT;
1740 i += len;
1741
1742 max = count - i;
1743 len = count_trail_chars(&user_buffer[i], max);
1744 if (len < 0)
1745 return len;
1746
1747 i += len;
1748
1749 if (debug)
1750 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1751 name, (unsigned long)count);
1752
1753 if (!t) {
1754 printk(KERN_ERR "pktgen: ERROR: No thread\n");
1755 ret = -EINVAL;
1756 goto out;
1757 }
1758
1759 pg_result = &(t->result[0]);
1760
1761 if (!strcmp(name, "add_device")) {
1762 char f[32];
1763 memset(f, 0, 32);
1764 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1765 if (len < 0) {
1766 ret = len;
1767 goto out;
1768 }
1769 if (copy_from_user(f, &user_buffer[i], len))
1770 return -EFAULT;
1771 i += len;
1772 mutex_lock(&pktgen_thread_lock);
1773 pktgen_add_device(t, f);
1774 mutex_unlock(&pktgen_thread_lock);
1775 ret = count;
1776 sprintf(pg_result, "OK: add_device=%s", f);
1777 goto out;
1778 }
1779
1780 if (!strcmp(name, "rem_device_all")) {
1781 mutex_lock(&pktgen_thread_lock);
1782 t->control |= T_REMDEVALL;
1783 mutex_unlock(&pktgen_thread_lock);
1784 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1785 ret = count;
1786 sprintf(pg_result, "OK: rem_device_all");
1787 goto out;
1788 }
1789
1790 if (!strcmp(name, "max_before_softirq")) {
1791 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1792 ret = count;
1793 goto out;
1794 }
1795
1796 ret = -EINVAL;
1797out:
1798 return ret;
1799}
1800
1801static int pktgen_thread_open(struct inode *inode, struct file *file)
1802{
1803 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1804}
1805
1806static const struct file_operations pktgen_thread_fops = {
1807 .owner = THIS_MODULE,
1808 .open = pktgen_thread_open,
1809 .read = seq_read,
1810 .llseek = seq_lseek,
1811 .write = pktgen_thread_write,
1812 .release = single_release,
1813};
1814
1815/* Think find or remove for NN */
1816static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1817{
1818 struct pktgen_thread *t;
1819 struct pktgen_dev *pkt_dev = NULL;
1820
1821 list_for_each_entry(t, &pktgen_threads, th_list) {
1822 pkt_dev = pktgen_find_dev(t, ifname);
1823 if (pkt_dev) {
1824 if (remove) {
1825 if_lock(t);
1826 pkt_dev->removal_mark = 1;
1827 t->control |= T_REMDEV;
1828 if_unlock(t);
1829 }
1830 break;
1831 }
1832 }
1833 return pkt_dev;
1834}
1835
1836/*
1837 * mark a device for removal
1838 */
1839static void pktgen_mark_device(const char *ifname)
1840{
1841 struct pktgen_dev *pkt_dev = NULL;
1842 const int max_tries = 10, msec_per_try = 125;
1843 int i = 0;
1844
1845 mutex_lock(&pktgen_thread_lock);
1846 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname);
1847
1848 while (1) {
1849
1850 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1851 if (pkt_dev == NULL)
1852 break; /* success */
1853
1854 mutex_unlock(&pktgen_thread_lock);
1855 pr_debug("pktgen: pktgen_mark_device waiting for %s "
1856 "to disappear....\n", ifname);
1857 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1858 mutex_lock(&pktgen_thread_lock);
1859
1860 if (++i >= max_tries) {
1861 printk(KERN_ERR "pktgen_mark_device: timed out after "
1862 "waiting %d msec for device %s to be removed\n",
1863 msec_per_try * i, ifname);
1864 break;
1865 }
1866
1867 }
1868
1869 mutex_unlock(&pktgen_thread_lock);
1870}
1871
1872static void pktgen_change_name(struct net_device *dev)
1873{
1874 struct pktgen_thread *t;
1875
1876 list_for_each_entry(t, &pktgen_threads, th_list) {
1877 struct pktgen_dev *pkt_dev;
1878
1879 list_for_each_entry(pkt_dev, &t->if_list, list) {
1880 if (pkt_dev->odev != dev)
1881 continue;
1882
1883 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1884
1885 pkt_dev->entry = proc_create_data(dev->name, 0600,
1886 pg_proc_dir,
1887 &pktgen_if_fops,
1888 pkt_dev);
1889 if (!pkt_dev->entry)
1890 printk(KERN_ERR "pktgen: can't move proc "
1891 " entry for '%s'\n", dev->name);
1892 break;
1893 }
1894 }
1895}
1896
1897static int pktgen_device_event(struct notifier_block *unused,
1898 unsigned long event, void *ptr)
1899{
1900 struct net_device *dev = ptr;
1901
1902 if (!net_eq(dev_net(dev), &init_net))
1903 return NOTIFY_DONE;
1904
1905 /* It is OK that we do not hold the group lock right now,
1906 * as we run under the RTNL lock.
1907 */
1908
1909 switch (event) {
1910 case NETDEV_CHANGENAME:
1911 pktgen_change_name(dev);
1912 break;
1913
1914 case NETDEV_UNREGISTER:
1915 pktgen_mark_device(dev->name);
1916 break;
1917 }
1918
1919 return NOTIFY_DONE;
1920}
1921
1922static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev,
1923 const char *ifname)
1924{
1925 char b[IFNAMSIZ+5];
1926 int i = 0;
1927
1928 for (i = 0; ifname[i] != '@'; i++) {
1929 if (i == IFNAMSIZ)
1930 break;
1931
1932 b[i] = ifname[i];
1933 }
1934 b[i] = 0;
1935
1936 return dev_get_by_name(&init_net, b);
1937}
1938
1939
1940/* Associate pktgen_dev with a device. */
1941
1942static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1943{
1944 struct net_device *odev;
1945 int err;
1946
1947 /* Clean old setups */
1948 if (pkt_dev->odev) {
1949 dev_put(pkt_dev->odev);
1950 pkt_dev->odev = NULL;
1951 }
1952
1953 odev = pktgen_dev_get_by_name(pkt_dev, ifname);
1954 if (!odev) {
1955 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname);
1956 return -ENODEV;
1957 }
1958
1959 if (odev->type != ARPHRD_ETHER) {
1960 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname);
1961 err = -EINVAL;
1962 } else if (!netif_running(odev)) {
1963 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname);
1964 err = -ENETDOWN;
1965 } else {
1966 pkt_dev->odev = odev;
1967 return 0;
1968 }
1969
1970 dev_put(odev);
1971 return err;
1972}
1973
1974/* Read pkt_dev from the interface and set up internal pktgen_dev
1975 * structure to have the right information to create/send packets
1976 */
1977static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
1978{
1979 int ntxq;
1980
1981 if (!pkt_dev->odev) {
1982 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in "
1983 "setup_inject.\n");
1984 sprintf(pkt_dev->result,
1985 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1986 return;
1987 }
1988
1989 /* make sure that we don't pick a non-existing transmit queue */
1990 ntxq = pkt_dev->odev->real_num_tx_queues;
1991
1992 if (ntxq <= pkt_dev->queue_map_min) {
1993 printk(KERN_WARNING "pktgen: WARNING: Requested "
1994 "queue_map_min (zero-based) (%d) exceeds valid range "
1995 "[0 - %d] for (%d) queues on %s, resetting\n",
1996 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
1997 pkt_dev->odev->name);
1998 pkt_dev->queue_map_min = ntxq - 1;
1999 }
2000 if (pkt_dev->queue_map_max >= ntxq) {
2001 printk(KERN_WARNING "pktgen: WARNING: Requested "
2002 "queue_map_max (zero-based) (%d) exceeds valid range "
2003 "[0 - %d] for (%d) queues on %s, resetting\n",
2004 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2005 pkt_dev->odev->name);
2006 pkt_dev->queue_map_max = ntxq - 1;
2007 }
2008
2009 /* Default to the interface's mac if not explicitly set. */
2010
2011 if (is_zero_ether_addr(pkt_dev->src_mac))
2012 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2013
2014 /* Set up Dest MAC */
2015 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2016
2017 /* Set up pkt size */
2018 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2019
2020 if (pkt_dev->flags & F_IPV6) {
2021 /*
2022 * Skip this automatic address setting until locks or functions
2023 * gets exported
2024 */
2025
2026#ifdef NOTNOW
2027 int i, set = 0, err = 1;
2028 struct inet6_dev *idev;
2029
2030 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2031 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2032 set = 1;
2033 break;
2034 }
2035
2036 if (!set) {
2037
2038 /*
2039 * Use linklevel address if unconfigured.
2040 *
2041 * use ipv6_get_lladdr if/when it's get exported
2042 */
2043
2044 rcu_read_lock();
2045 idev = __in6_dev_get(pkt_dev->odev);
2046 if (idev) {
2047 struct inet6_ifaddr *ifp;
2048
2049 read_lock_bh(&idev->lock);
2050 for (ifp = idev->addr_list; ifp;
2051 ifp = ifp->if_next) {
2052 if (ifp->scope == IFA_LINK
2053 && !(ifp->
2054 flags & IFA_F_TENTATIVE)) {
2055 ipv6_addr_copy(&pkt_dev->
2056 cur_in6_saddr,
2057 &ifp->addr);
2058 err = 0;
2059 break;
2060 }
2061 }
2062 read_unlock_bh(&idev->lock);
2063 }
2064 rcu_read_unlock();
2065 if (err)
2066 printk(KERN_ERR "pktgen: ERROR: IPv6 link "
2067 "address not availble.\n");
2068 }
2069#endif
2070 } else {
2071 pkt_dev->saddr_min = 0;
2072 pkt_dev->saddr_max = 0;
2073 if (strlen(pkt_dev->src_min) == 0) {
2074
2075 struct in_device *in_dev;
2076
2077 rcu_read_lock();
2078 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2079 if (in_dev) {
2080 if (in_dev->ifa_list) {
2081 pkt_dev->saddr_min =
2082 in_dev->ifa_list->ifa_address;
2083 pkt_dev->saddr_max = pkt_dev->saddr_min;
2084 }
2085 }
2086 rcu_read_unlock();
2087 } else {
2088 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2089 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2090 }
2091
2092 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2093 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2094 }
2095 /* Initialize current values. */
2096 pkt_dev->cur_dst_mac_offset = 0;
2097 pkt_dev->cur_src_mac_offset = 0;
2098 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2099 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2100 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2101 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2102 pkt_dev->nflows = 0;
2103}
2104
2105
2106static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2107{
2108 ktime_t start;
2109 s32 remaining;
2110 struct hrtimer_sleeper t;
2111
2112 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2113 hrtimer_set_expires(&t.timer, spin_until);
2114
2115 remaining = ktime_to_us(hrtimer_expires_remaining(&t.timer));
2116 if (remaining <= 0)
2117 return;
2118
2119 start = ktime_now();
2120 if (remaining < 100)
2121 udelay(remaining); /* really small just spin */
2122 else {
2123 /* see do_nanosleep */
2124 hrtimer_init_sleeper(&t, current);
2125 do {
2126 set_current_state(TASK_INTERRUPTIBLE);
2127 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2128 if (!hrtimer_active(&t.timer))
2129 t.task = NULL;
2130
2131 if (likely(t.task))
2132 schedule();
2133
2134 hrtimer_cancel(&t.timer);
2135 } while (t.task && pkt_dev->running && !signal_pending(current));
2136 __set_current_state(TASK_RUNNING);
2137 }
2138 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), start));
2139}
2140
2141static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2142{
2143 pkt_dev->pkt_overhead = 0;
2144 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2145 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2146 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2147}
2148
2149static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2150{
2151 return !!(pkt_dev->flows[flow].flags & F_INIT);
2152}
2153
2154static inline int f_pick(struct pktgen_dev *pkt_dev)
2155{
2156 int flow = pkt_dev->curfl;
2157
2158 if (pkt_dev->flags & F_FLOW_SEQ) {
2159 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2160 /* reset time */
2161 pkt_dev->flows[flow].count = 0;
2162 pkt_dev->flows[flow].flags = 0;
2163 pkt_dev->curfl += 1;
2164 if (pkt_dev->curfl >= pkt_dev->cflows)
2165 pkt_dev->curfl = 0; /*reset */
2166 }
2167 } else {
2168 flow = random32() % pkt_dev->cflows;
2169 pkt_dev->curfl = flow;
2170
2171 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2172 pkt_dev->flows[flow].count = 0;
2173 pkt_dev->flows[flow].flags = 0;
2174 }
2175 }
2176
2177 return pkt_dev->curfl;
2178}
2179
2180
2181#ifdef CONFIG_XFRM
2182/* If there was already an IPSEC SA, we keep it as is, else
2183 * we go look for it ...
2184*/
2185static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2186{
2187 struct xfrm_state *x = pkt_dev->flows[flow].x;
2188 if (!x) {
2189 /*slow path: we dont already have xfrm_state*/
2190 x = xfrm_stateonly_find(&init_net,
2191 (xfrm_address_t *)&pkt_dev->cur_daddr,
2192 (xfrm_address_t *)&pkt_dev->cur_saddr,
2193 AF_INET,
2194 pkt_dev->ipsmode,
2195 pkt_dev->ipsproto, 0);
2196 if (x) {
2197 pkt_dev->flows[flow].x = x;
2198 set_pkt_overhead(pkt_dev);
2199 pkt_dev->pkt_overhead += x->props.header_len;
2200 }
2201
2202 }
2203}
2204#endif
2205static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2206{
2207
2208 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2209 pkt_dev->cur_queue_map = smp_processor_id();
2210
2211 else if (pkt_dev->queue_map_min < pkt_dev->queue_map_max) {
2212 __u16 t;
2213 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2214 t = random32() %
2215 (pkt_dev->queue_map_max -
2216 pkt_dev->queue_map_min + 1)
2217 + pkt_dev->queue_map_min;
2218 } else {
2219 t = pkt_dev->cur_queue_map + 1;
2220 if (t > pkt_dev->queue_map_max)
2221 t = pkt_dev->queue_map_min;
2222 }
2223 pkt_dev->cur_queue_map = t;
2224 }
2225 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2226}
2227
2228/* Increment/randomize headers according to flags and current values
2229 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2230 */
2231static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2232{
2233 __u32 imn;
2234 __u32 imx;
2235 int flow = 0;
2236
2237 if (pkt_dev->cflows)
2238 flow = f_pick(pkt_dev);
2239
2240 /* Deal with source MAC */
2241 if (pkt_dev->src_mac_count > 1) {
2242 __u32 mc;
2243 __u32 tmp;
2244
2245 if (pkt_dev->flags & F_MACSRC_RND)
2246 mc = random32() % pkt_dev->src_mac_count;
2247 else {
2248 mc = pkt_dev->cur_src_mac_offset++;
2249 if (pkt_dev->cur_src_mac_offset >=
2250 pkt_dev->src_mac_count)
2251 pkt_dev->cur_src_mac_offset = 0;
2252 }
2253
2254 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2255 pkt_dev->hh[11] = tmp;
2256 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2257 pkt_dev->hh[10] = tmp;
2258 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2259 pkt_dev->hh[9] = tmp;
2260 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2261 pkt_dev->hh[8] = tmp;
2262 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2263 pkt_dev->hh[7] = tmp;
2264 }
2265
2266 /* Deal with Destination MAC */
2267 if (pkt_dev->dst_mac_count > 1) {
2268 __u32 mc;
2269 __u32 tmp;
2270
2271 if (pkt_dev->flags & F_MACDST_RND)
2272 mc = random32() % pkt_dev->dst_mac_count;
2273
2274 else {
2275 mc = pkt_dev->cur_dst_mac_offset++;
2276 if (pkt_dev->cur_dst_mac_offset >=
2277 pkt_dev->dst_mac_count) {
2278 pkt_dev->cur_dst_mac_offset = 0;
2279 }
2280 }
2281
2282 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2283 pkt_dev->hh[5] = tmp;
2284 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2285 pkt_dev->hh[4] = tmp;
2286 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2287 pkt_dev->hh[3] = tmp;
2288 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2289 pkt_dev->hh[2] = tmp;
2290 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2291 pkt_dev->hh[1] = tmp;
2292 }
2293
2294 if (pkt_dev->flags & F_MPLS_RND) {
2295 unsigned i;
2296 for (i = 0; i < pkt_dev->nr_labels; i++)
2297 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2298 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2299 ((__force __be32)random32() &
2300 htonl(0x000fffff));
2301 }
2302
2303 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2304 pkt_dev->vlan_id = random32() & (4096-1);
2305 }
2306
2307 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2308 pkt_dev->svlan_id = random32() & (4096 - 1);
2309 }
2310
2311 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2312 if (pkt_dev->flags & F_UDPSRC_RND)
2313 pkt_dev->cur_udp_src = random32() %
2314 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2315 + pkt_dev->udp_src_min;
2316
2317 else {
2318 pkt_dev->cur_udp_src++;
2319 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2320 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2321 }
2322 }
2323
2324 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2325 if (pkt_dev->flags & F_UDPDST_RND) {
2326 pkt_dev->cur_udp_dst = random32() %
2327 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2328 + pkt_dev->udp_dst_min;
2329 } else {
2330 pkt_dev->cur_udp_dst++;
2331 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2332 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2333 }
2334 }
2335
2336 if (!(pkt_dev->flags & F_IPV6)) {
2337
2338 imn = ntohl(pkt_dev->saddr_min);
2339 imx = ntohl(pkt_dev->saddr_max);
2340 if (imn < imx) {
2341 __u32 t;
2342 if (pkt_dev->flags & F_IPSRC_RND)
2343 t = random32() % (imx - imn) + imn;
2344 else {
2345 t = ntohl(pkt_dev->cur_saddr);
2346 t++;
2347 if (t > imx)
2348 t = imn;
2349
2350 }
2351 pkt_dev->cur_saddr = htonl(t);
2352 }
2353
2354 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2355 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2356 } else {
2357 imn = ntohl(pkt_dev->daddr_min);
2358 imx = ntohl(pkt_dev->daddr_max);
2359 if (imn < imx) {
2360 __u32 t;
2361 __be32 s;
2362 if (pkt_dev->flags & F_IPDST_RND) {
2363
2364 t = random32() % (imx - imn) + imn;
2365 s = htonl(t);
2366
2367 while (ipv4_is_loopback(s) ||
2368 ipv4_is_multicast(s) ||
2369 ipv4_is_lbcast(s) ||
2370 ipv4_is_zeronet(s) ||
2371 ipv4_is_local_multicast(s)) {
2372 t = random32() % (imx - imn) + imn;
2373 s = htonl(t);
2374 }
2375 pkt_dev->cur_daddr = s;
2376 } else {
2377 t = ntohl(pkt_dev->cur_daddr);
2378 t++;
2379 if (t > imx) {
2380 t = imn;
2381 }
2382 pkt_dev->cur_daddr = htonl(t);
2383 }
2384 }
2385 if (pkt_dev->cflows) {
2386 pkt_dev->flows[flow].flags |= F_INIT;
2387 pkt_dev->flows[flow].cur_daddr =
2388 pkt_dev->cur_daddr;
2389#ifdef CONFIG_XFRM
2390 if (pkt_dev->flags & F_IPSEC_ON)
2391 get_ipsec_sa(pkt_dev, flow);
2392#endif
2393 pkt_dev->nflows++;
2394 }
2395 }
2396 } else { /* IPV6 * */
2397
2398 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2399 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2400 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2401 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2402 else {
2403 int i;
2404
2405 /* Only random destinations yet */
2406
2407 for (i = 0; i < 4; i++) {
2408 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2409 (((__force __be32)random32() |
2410 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2411 pkt_dev->max_in6_daddr.s6_addr32[i]);
2412 }
2413 }
2414 }
2415
2416 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2417 __u32 t;
2418 if (pkt_dev->flags & F_TXSIZE_RND) {
2419 t = random32() %
2420 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2421 + pkt_dev->min_pkt_size;
2422 } else {
2423 t = pkt_dev->cur_pkt_size + 1;
2424 if (t > pkt_dev->max_pkt_size)
2425 t = pkt_dev->min_pkt_size;
2426 }
2427 pkt_dev->cur_pkt_size = t;
2428 }
2429
2430 set_cur_queue_map(pkt_dev);
2431
2432 pkt_dev->flows[flow].count++;
2433}
2434
2435
2436#ifdef CONFIG_XFRM
2437static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2438{
2439 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2440 int err = 0;
2441 struct iphdr *iph;
2442
2443 if (!x)
2444 return 0;
2445 /* XXX: we dont support tunnel mode for now until
2446 * we resolve the dst issue */
2447 if (x->props.mode != XFRM_MODE_TRANSPORT)
2448 return 0;
2449
2450 spin_lock(&x->lock);
2451 iph = ip_hdr(skb);
2452
2453 err = x->outer_mode->output(x, skb);
2454 if (err)
2455 goto error;
2456 err = x->type->output(x, skb);
2457 if (err)
2458 goto error;
2459
2460 x->curlft.bytes += skb->len;
2461 x->curlft.packets++;
2462error:
2463 spin_unlock(&x->lock);
2464 return err;
2465}
2466
2467static void free_SAs(struct pktgen_dev *pkt_dev)
2468{
2469 if (pkt_dev->cflows) {
2470 /* let go of the SAs if we have them */
2471 int i = 0;
2472 for (; i < pkt_dev->cflows; i++) {
2473 struct xfrm_state *x = pkt_dev->flows[i].x;
2474 if (x) {
2475 xfrm_state_put(x);
2476 pkt_dev->flows[i].x = NULL;
2477 }
2478 }
2479 }
2480}
2481
2482static int process_ipsec(struct pktgen_dev *pkt_dev,
2483 struct sk_buff *skb, __be16 protocol)
2484{
2485 if (pkt_dev->flags & F_IPSEC_ON) {
2486 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2487 int nhead = 0;
2488 if (x) {
2489 int ret;
2490 __u8 *eth;
2491 nhead = x->props.header_len - skb_headroom(skb);
2492 if (nhead > 0) {
2493 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2494 if (ret < 0) {
2495 printk(KERN_ERR "Error expanding "
2496 "ipsec packet %d\n", ret);
2497 goto err;
2498 }
2499 }
2500
2501 /* ipsec is not expecting ll header */
2502 skb_pull(skb, ETH_HLEN);
2503 ret = pktgen_output_ipsec(skb, pkt_dev);
2504 if (ret) {
2505 printk(KERN_ERR "Error creating ipsec "
2506 "packet %d\n", ret);
2507 goto err;
2508 }
2509 /* restore ll */
2510 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2511 memcpy(eth, pkt_dev->hh, 12);
2512 *(u16 *) &eth[12] = protocol;
2513 }
2514 }
2515 return 1;
2516err:
2517 kfree_skb(skb);
2518 return 0;
2519}
2520#endif
2521
2522static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2523{
2524 unsigned i;
2525 for (i = 0; i < pkt_dev->nr_labels; i++)
2526 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2527
2528 mpls--;
2529 *mpls |= MPLS_STACK_BOTTOM;
2530}
2531
2532static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2533 unsigned int prio)
2534{
2535 return htons(id | (cfi << 12) | (prio << 13));
2536}
2537
2538static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2539 struct pktgen_dev *pkt_dev)
2540{
2541 struct sk_buff *skb = NULL;
2542 __u8 *eth;
2543 struct udphdr *udph;
2544 int datalen, iplen;
2545 struct iphdr *iph;
2546 struct pktgen_hdr *pgh = NULL;
2547 __be16 protocol = htons(ETH_P_IP);
2548 __be32 *mpls;
2549 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2550 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2551 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2552 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2553 u16 queue_map;
2554
2555 if (pkt_dev->nr_labels)
2556 protocol = htons(ETH_P_MPLS_UC);
2557
2558 if (pkt_dev->vlan_id != 0xffff)
2559 protocol = htons(ETH_P_8021Q);
2560
2561 /* Update any of the values, used when we're incrementing various
2562 * fields.
2563 */
2564 queue_map = pkt_dev->cur_queue_map;
2565 mod_cur_headers(pkt_dev);
2566
2567 datalen = (odev->hard_header_len + 16) & ~0xf;
2568 skb = __netdev_alloc_skb(odev,
2569 pkt_dev->cur_pkt_size + 64
2570 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2571 if (!skb) {
2572 sprintf(pkt_dev->result, "No memory");
2573 return NULL;
2574 }
2575
2576 skb_reserve(skb, datalen);
2577
2578 /* Reserve for ethernet and IP header */
2579 eth = (__u8 *) skb_push(skb, 14);
2580 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2581 if (pkt_dev->nr_labels)
2582 mpls_push(mpls, pkt_dev);
2583
2584 if (pkt_dev->vlan_id != 0xffff) {
2585 if (pkt_dev->svlan_id != 0xffff) {
2586 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2587 *svlan_tci = build_tci(pkt_dev->svlan_id,
2588 pkt_dev->svlan_cfi,
2589 pkt_dev->svlan_p);
2590 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2591 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2592 }
2593 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2594 *vlan_tci = build_tci(pkt_dev->vlan_id,
2595 pkt_dev->vlan_cfi,
2596 pkt_dev->vlan_p);
2597 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2598 *vlan_encapsulated_proto = htons(ETH_P_IP);
2599 }
2600
2601 skb->network_header = skb->tail;
2602 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2603 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2604 skb_set_queue_mapping(skb, queue_map);
2605 iph = ip_hdr(skb);
2606 udph = udp_hdr(skb);
2607
2608 memcpy(eth, pkt_dev->hh, 12);
2609 *(__be16 *) & eth[12] = protocol;
2610
2611 /* Eth + IPh + UDPh + mpls */
2612 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2613 pkt_dev->pkt_overhead;
2614 if (datalen < sizeof(struct pktgen_hdr))
2615 datalen = sizeof(struct pktgen_hdr);
2616
2617 udph->source = htons(pkt_dev->cur_udp_src);
2618 udph->dest = htons(pkt_dev->cur_udp_dst);
2619 udph->len = htons(datalen + 8); /* DATA + udphdr */
2620 udph->check = 0; /* No checksum */
2621
2622 iph->ihl = 5;
2623 iph->version = 4;
2624 iph->ttl = 32;
2625 iph->tos = pkt_dev->tos;
2626 iph->protocol = IPPROTO_UDP; /* UDP */
2627 iph->saddr = pkt_dev->cur_saddr;
2628 iph->daddr = pkt_dev->cur_daddr;
2629 iph->frag_off = 0;
2630 iplen = 20 + 8 + datalen;
2631 iph->tot_len = htons(iplen);
2632 iph->check = 0;
2633 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2634 skb->protocol = protocol;
2635 skb->mac_header = (skb->network_header - ETH_HLEN -
2636 pkt_dev->pkt_overhead);
2637 skb->dev = odev;
2638 skb->pkt_type = PACKET_HOST;
2639
2640 if (pkt_dev->nfrags <= 0)
2641 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2642 else {
2643 int frags = pkt_dev->nfrags;
2644 int i;
2645
2646 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2647
2648 if (frags > MAX_SKB_FRAGS)
2649 frags = MAX_SKB_FRAGS;
2650 if (datalen > frags * PAGE_SIZE) {
2651 skb_put(skb, datalen - frags * PAGE_SIZE);
2652 datalen = frags * PAGE_SIZE;
2653 }
2654
2655 i = 0;
2656 while (datalen > 0) {
2657 struct page *page = alloc_pages(GFP_KERNEL, 0);
2658 skb_shinfo(skb)->frags[i].page = page;
2659 skb_shinfo(skb)->frags[i].page_offset = 0;
2660 skb_shinfo(skb)->frags[i].size =
2661 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2662 datalen -= skb_shinfo(skb)->frags[i].size;
2663 skb->len += skb_shinfo(skb)->frags[i].size;
2664 skb->data_len += skb_shinfo(skb)->frags[i].size;
2665 i++;
2666 skb_shinfo(skb)->nr_frags = i;
2667 }
2668
2669 while (i < frags) {
2670 int rem;
2671
2672 if (i == 0)
2673 break;
2674
2675 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2676 if (rem == 0)
2677 break;
2678
2679 skb_shinfo(skb)->frags[i - 1].size -= rem;
2680
2681 skb_shinfo(skb)->frags[i] =
2682 skb_shinfo(skb)->frags[i - 1];
2683 get_page(skb_shinfo(skb)->frags[i].page);
2684 skb_shinfo(skb)->frags[i].page =
2685 skb_shinfo(skb)->frags[i - 1].page;
2686 skb_shinfo(skb)->frags[i].page_offset +=
2687 skb_shinfo(skb)->frags[i - 1].size;
2688 skb_shinfo(skb)->frags[i].size = rem;
2689 i++;
2690 skb_shinfo(skb)->nr_frags = i;
2691 }
2692 }
2693
2694 /* Stamp the time, and sequence number,
2695 * convert them to network byte order
2696 */
2697 if (pgh) {
2698 struct timeval timestamp;
2699
2700 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2701 pgh->seq_num = htonl(pkt_dev->seq_num);
2702
2703 do_gettimeofday(&timestamp);
2704 pgh->tv_sec = htonl(timestamp.tv_sec);
2705 pgh->tv_usec = htonl(timestamp.tv_usec);
2706 }
2707
2708#ifdef CONFIG_XFRM
2709 if (!process_ipsec(pkt_dev, skb, protocol))
2710 return NULL;
2711#endif
2712
2713 return skb;
2714}
2715
2716/*
2717 * scan_ip6, fmt_ip taken from dietlibc-0.21
2718 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2719 *
2720 * Slightly modified for kernel.
2721 * Should be candidate for net/ipv4/utils.c
2722 * --ro
2723 */
2724
2725static unsigned int scan_ip6(const char *s, char ip[16])
2726{
2727 unsigned int i;
2728 unsigned int len = 0;
2729 unsigned long u;
2730 char suffix[16];
2731 unsigned int prefixlen = 0;
2732 unsigned int suffixlen = 0;
2733 __be32 tmp;
2734 char *pos;
2735
2736 for (i = 0; i < 16; i++)
2737 ip[i] = 0;
2738
2739 for (;;) {
2740 if (*s == ':') {
2741 len++;
2742 if (s[1] == ':') { /* Found "::", skip to part 2 */
2743 s += 2;
2744 len++;
2745 break;
2746 }
2747 s++;
2748 }
2749
2750 u = simple_strtoul(s, &pos, 16);
2751 i = pos - s;
2752 if (!i)
2753 return 0;
2754 if (prefixlen == 12 && s[i] == '.') {
2755
2756 /* the last 4 bytes may be written as IPv4 address */
2757
2758 tmp = in_aton(s);
2759 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2760 return i + len;
2761 }
2762 ip[prefixlen++] = (u >> 8);
2763 ip[prefixlen++] = (u & 255);
2764 s += i;
2765 len += i;
2766 if (prefixlen == 16)
2767 return len;
2768 }
2769
2770/* part 2, after "::" */
2771 for (;;) {
2772 if (*s == ':') {
2773 if (suffixlen == 0)
2774 break;
2775 s++;
2776 len++;
2777 } else if (suffixlen != 0)
2778 break;
2779
2780 u = simple_strtol(s, &pos, 16);
2781 i = pos - s;
2782 if (!i) {
2783 if (*s)
2784 len--;
2785 break;
2786 }
2787 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2788 tmp = in_aton(s);
2789 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2790 sizeof(tmp));
2791 suffixlen += 4;
2792 len += strlen(s);
2793 break;
2794 }
2795 suffix[suffixlen++] = (u >> 8);
2796 suffix[suffixlen++] = (u & 255);
2797 s += i;
2798 len += i;
2799 if (prefixlen + suffixlen == 16)
2800 break;
2801 }
2802 for (i = 0; i < suffixlen; i++)
2803 ip[16 - suffixlen + i] = suffix[i];
2804 return len;
2805}
2806
2807static char tohex(char hexdigit)
2808{
2809 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2810}
2811
2812static int fmt_xlong(char *s, unsigned int i)
2813{
2814 char *bak = s;
2815 *s = tohex((i >> 12) & 0xf);
2816 if (s != bak || *s != '0')
2817 ++s;
2818 *s = tohex((i >> 8) & 0xf);
2819 if (s != bak || *s != '0')
2820 ++s;
2821 *s = tohex((i >> 4) & 0xf);
2822 if (s != bak || *s != '0')
2823 ++s;
2824 *s = tohex(i & 0xf);
2825 return s - bak + 1;
2826}
2827
2828static unsigned int fmt_ip6(char *s, const char ip[16])
2829{
2830 unsigned int len;
2831 unsigned int i;
2832 unsigned int temp;
2833 unsigned int compressing;
2834 int j;
2835
2836 len = 0;
2837 compressing = 0;
2838 for (j = 0; j < 16; j += 2) {
2839
2840#ifdef V4MAPPEDPREFIX
2841 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2842 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2843 temp = strlen(s);
2844 return len + temp;
2845 }
2846#endif
2847 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2848 (unsigned long)(unsigned char)ip[j + 1];
2849 if (temp == 0) {
2850 if (!compressing) {
2851 compressing = 1;
2852 if (j == 0) {
2853 *s++ = ':';
2854 ++len;
2855 }
2856 }
2857 } else {
2858 if (compressing) {
2859 compressing = 0;
2860 *s++ = ':';
2861 ++len;
2862 }
2863 i = fmt_xlong(s, temp);
2864 len += i;
2865 s += i;
2866 if (j < 14) {
2867 *s++ = ':';
2868 ++len;
2869 }
2870 }
2871 }
2872 if (compressing) {
2873 *s++ = ':';
2874 ++len;
2875 }
2876 *s = 0;
2877 return len;
2878}
2879
2880static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2881 struct pktgen_dev *pkt_dev)
2882{
2883 struct sk_buff *skb = NULL;
2884 __u8 *eth;
2885 struct udphdr *udph;
2886 int datalen;
2887 struct ipv6hdr *iph;
2888 struct pktgen_hdr *pgh = NULL;
2889 __be16 protocol = htons(ETH_P_IPV6);
2890 __be32 *mpls;
2891 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2892 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2893 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2894 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2895 u16 queue_map;
2896
2897 if (pkt_dev->nr_labels)
2898 protocol = htons(ETH_P_MPLS_UC);
2899
2900 if (pkt_dev->vlan_id != 0xffff)
2901 protocol = htons(ETH_P_8021Q);
2902
2903 /* Update any of the values, used when we're incrementing various
2904 * fields.
2905 */
2906 queue_map = pkt_dev->cur_queue_map;
2907 mod_cur_headers(pkt_dev);
2908
2909 skb = __netdev_alloc_skb(odev,
2910 pkt_dev->cur_pkt_size + 64
2911 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
2912 if (!skb) {
2913 sprintf(pkt_dev->result, "No memory");
2914 return NULL;
2915 }
2916
2917 skb_reserve(skb, 16);
2918
2919 /* Reserve for ethernet and IP header */
2920 eth = (__u8 *) skb_push(skb, 14);
2921 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2922 if (pkt_dev->nr_labels)
2923 mpls_push(mpls, pkt_dev);
2924
2925 if (pkt_dev->vlan_id != 0xffff) {
2926 if (pkt_dev->svlan_id != 0xffff) {
2927 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2928 *svlan_tci = build_tci(pkt_dev->svlan_id,
2929 pkt_dev->svlan_cfi,
2930 pkt_dev->svlan_p);
2931 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2932 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2933 }
2934 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2935 *vlan_tci = build_tci(pkt_dev->vlan_id,
2936 pkt_dev->vlan_cfi,
2937 pkt_dev->vlan_p);
2938 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2939 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2940 }
2941
2942 skb->network_header = skb->tail;
2943 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2944 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2945 skb_set_queue_mapping(skb, queue_map);
2946 iph = ipv6_hdr(skb);
2947 udph = udp_hdr(skb);
2948
2949 memcpy(eth, pkt_dev->hh, 12);
2950 *(__be16 *) &eth[12] = protocol;
2951
2952 /* Eth + IPh + UDPh + mpls */
2953 datalen = pkt_dev->cur_pkt_size - 14 -
2954 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2955 pkt_dev->pkt_overhead;
2956
2957 if (datalen < sizeof(struct pktgen_hdr)) {
2958 datalen = sizeof(struct pktgen_hdr);
2959 if (net_ratelimit())
2960 printk(KERN_INFO "pktgen: increased datalen to %d\n",
2961 datalen);
2962 }
2963
2964 udph->source = htons(pkt_dev->cur_udp_src);
2965 udph->dest = htons(pkt_dev->cur_udp_dst);
2966 udph->len = htons(datalen + sizeof(struct udphdr));
2967 udph->check = 0; /* No checksum */
2968
2969 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2970
2971 if (pkt_dev->traffic_class) {
2972 /* Version + traffic class + flow (0) */
2973 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2974 }
2975
2976 iph->hop_limit = 32;
2977
2978 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2979 iph->nexthdr = IPPROTO_UDP;
2980
2981 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2982 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2983
2984 skb->mac_header = (skb->network_header - ETH_HLEN -
2985 pkt_dev->pkt_overhead);
2986 skb->protocol = protocol;
2987 skb->dev = odev;
2988 skb->pkt_type = PACKET_HOST;
2989
2990 if (pkt_dev->nfrags <= 0)
2991 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2992 else {
2993 int frags = pkt_dev->nfrags;
2994 int i;
2995
2996 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2997
2998 if (frags > MAX_SKB_FRAGS)
2999 frags = MAX_SKB_FRAGS;
3000 if (datalen > frags * PAGE_SIZE) {
3001 skb_put(skb, datalen - frags * PAGE_SIZE);
3002 datalen = frags * PAGE_SIZE;
3003 }
3004
3005 i = 0;
3006 while (datalen > 0) {
3007 struct page *page = alloc_pages(GFP_KERNEL, 0);
3008 skb_shinfo(skb)->frags[i].page = page;
3009 skb_shinfo(skb)->frags[i].page_offset = 0;
3010 skb_shinfo(skb)->frags[i].size =
3011 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
3012 datalen -= skb_shinfo(skb)->frags[i].size;
3013 skb->len += skb_shinfo(skb)->frags[i].size;
3014 skb->data_len += skb_shinfo(skb)->frags[i].size;
3015 i++;
3016 skb_shinfo(skb)->nr_frags = i;
3017 }
3018
3019 while (i < frags) {
3020 int rem;
3021
3022 if (i == 0)
3023 break;
3024
3025 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
3026 if (rem == 0)
3027 break;
3028
3029 skb_shinfo(skb)->frags[i - 1].size -= rem;
3030
3031 skb_shinfo(skb)->frags[i] =
3032 skb_shinfo(skb)->frags[i - 1];
3033 get_page(skb_shinfo(skb)->frags[i].page);
3034 skb_shinfo(skb)->frags[i].page =
3035 skb_shinfo(skb)->frags[i - 1].page;
3036 skb_shinfo(skb)->frags[i].page_offset +=
3037 skb_shinfo(skb)->frags[i - 1].size;
3038 skb_shinfo(skb)->frags[i].size = rem;
3039 i++;
3040 skb_shinfo(skb)->nr_frags = i;
3041 }
3042 }
3043
3044 /* Stamp the time, and sequence number,
3045 * convert them to network byte order
3046 * should we update cloned packets too ?
3047 */
3048 if (pgh) {
3049 struct timeval timestamp;
3050
3051 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
3052 pgh->seq_num = htonl(pkt_dev->seq_num);
3053
3054 do_gettimeofday(&timestamp);
3055 pgh->tv_sec = htonl(timestamp.tv_sec);
3056 pgh->tv_usec = htonl(timestamp.tv_usec);
3057 }
3058 /* pkt_dev->seq_num++; FF: you really mean this? */
3059
3060 return skb;
3061}
3062
3063static struct sk_buff *fill_packet(struct net_device *odev,
3064 struct pktgen_dev *pkt_dev)
3065{
3066 if (pkt_dev->flags & F_IPV6)
3067 return fill_packet_ipv6(odev, pkt_dev);
3068 else
3069 return fill_packet_ipv4(odev, pkt_dev);
3070}
3071
3072static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3073{
3074 pkt_dev->seq_num = 1;
3075 pkt_dev->idle_acc = 0;
3076 pkt_dev->sofar = 0;
3077 pkt_dev->tx_bytes = 0;
3078 pkt_dev->errors = 0;
3079}
3080
3081/* Set up structure for sending pkts, clear counters */
3082
3083static void pktgen_run(struct pktgen_thread *t)
3084{
3085 struct pktgen_dev *pkt_dev;
3086 int started = 0;
3087
3088 pr_debug("pktgen: entering pktgen_run. %p\n", t);
3089
3090 if_lock(t);
3091 list_for_each_entry(pkt_dev, &t->if_list, list) {
3092
3093 /*
3094 * setup odev and create initial packet.
3095 */
3096 pktgen_setup_inject(pkt_dev);
3097
3098 if (pkt_dev->odev) {
3099 pktgen_clear_counters(pkt_dev);
3100 pkt_dev->running = 1; /* Cranke yeself! */
3101 pkt_dev->skb = NULL;
3102 pkt_dev->started_at =
3103 pkt_dev->next_tx = ktime_now();
3104
3105 set_pkt_overhead(pkt_dev);
3106
3107 strcpy(pkt_dev->result, "Starting");
3108 started++;
3109 } else
3110 strcpy(pkt_dev->result, "Error starting");
3111 }
3112 if_unlock(t);
3113 if (started)
3114 t->control &= ~(T_STOP);
3115}
3116
3117static void pktgen_stop_all_threads_ifs(void)
3118{
3119 struct pktgen_thread *t;
3120
3121 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n");
3122
3123 mutex_lock(&pktgen_thread_lock);
3124
3125 list_for_each_entry(t, &pktgen_threads, th_list)
3126 t->control |= T_STOP;
3127
3128 mutex_unlock(&pktgen_thread_lock);
3129}
3130
3131static int thread_is_running(const struct pktgen_thread *t)
3132{
3133 const struct pktgen_dev *pkt_dev;
3134
3135 list_for_each_entry(pkt_dev, &t->if_list, list)
3136 if (pkt_dev->running)
3137 return 1;
3138 return 0;
3139}
3140
3141static int pktgen_wait_thread_run(struct pktgen_thread *t)
3142{
3143 if_lock(t);
3144
3145 while (thread_is_running(t)) {
3146
3147 if_unlock(t);
3148
3149 msleep_interruptible(100);
3150
3151 if (signal_pending(current))
3152 goto signal;
3153 if_lock(t);
3154 }
3155 if_unlock(t);
3156 return 1;
3157signal:
3158 return 0;
3159}
3160
3161static int pktgen_wait_all_threads_run(void)
3162{
3163 struct pktgen_thread *t;
3164 int sig = 1;
3165
3166 mutex_lock(&pktgen_thread_lock);
3167
3168 list_for_each_entry(t, &pktgen_threads, th_list) {
3169 sig = pktgen_wait_thread_run(t);
3170 if (sig == 0)
3171 break;
3172 }
3173
3174 if (sig == 0)
3175 list_for_each_entry(t, &pktgen_threads, th_list)
3176 t->control |= (T_STOP);
3177
3178 mutex_unlock(&pktgen_thread_lock);
3179 return sig;
3180}
3181
3182static void pktgen_run_all_threads(void)
3183{
3184 struct pktgen_thread *t;
3185
3186 pr_debug("pktgen: entering pktgen_run_all_threads.\n");
3187
3188 mutex_lock(&pktgen_thread_lock);
3189
3190 list_for_each_entry(t, &pktgen_threads, th_list)
3191 t->control |= (T_RUN);
3192
3193 mutex_unlock(&pktgen_thread_lock);
3194
3195 /* Propagate thread->control */
3196 schedule_timeout_interruptible(msecs_to_jiffies(125));
3197
3198 pktgen_wait_all_threads_run();
3199}
3200
3201static void pktgen_reset_all_threads(void)
3202{
3203 struct pktgen_thread *t;
3204
3205 pr_debug("pktgen: entering pktgen_reset_all_threads.\n");
3206
3207 mutex_lock(&pktgen_thread_lock);
3208
3209 list_for_each_entry(t, &pktgen_threads, th_list)
3210 t->control |= (T_REMDEVALL);
3211
3212 mutex_unlock(&pktgen_thread_lock);
3213
3214 /* Propagate thread->control */
3215 schedule_timeout_interruptible(msecs_to_jiffies(125));
3216
3217 pktgen_wait_all_threads_run();
3218}
3219
3220static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3221{
3222 __u64 bps, mbps, pps;
3223 char *p = pkt_dev->result;
3224 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3225 pkt_dev->started_at);
3226 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3227
3228 p += sprintf(p, "OK: %llu(c%llu+d%llu) nsec, %llu (%dbyte,%dfrags)\n",
3229 (unsigned long long)ktime_to_us(elapsed),
3230 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3231 (unsigned long long)ktime_to_us(idle),
3232 (unsigned long long)pkt_dev->sofar,
3233 pkt_dev->cur_pkt_size, nr_frags);
3234
3235 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3236 ktime_to_ns(elapsed));
3237
3238 bps = pps * 8 * pkt_dev->cur_pkt_size;
3239
3240 mbps = bps;
3241 do_div(mbps, 1000000);
3242 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3243 (unsigned long long)pps,
3244 (unsigned long long)mbps,
3245 (unsigned long long)bps,
3246 (unsigned long long)pkt_dev->errors);
3247}
3248
3249/* Set stopped-at timer, remove from running list, do counters & statistics */
3250static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3251{
3252 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3253
3254 if (!pkt_dev->running) {
3255 printk(KERN_WARNING "pktgen: interface: %s is already "
3256 "stopped\n", pkt_dev->odev->name);
3257 return -EINVAL;
3258 }
3259
3260 kfree_skb(pkt_dev->skb);
3261 pkt_dev->skb = NULL;
3262 pkt_dev->stopped_at = ktime_now();
3263 pkt_dev->running = 0;
3264
3265 show_results(pkt_dev, nr_frags);
3266
3267 return 0;
3268}
3269
3270static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3271{
3272 struct pktgen_dev *pkt_dev, *best = NULL;
3273
3274 if_lock(t);
3275
3276 list_for_each_entry(pkt_dev, &t->if_list, list) {
3277 if (!pkt_dev->running)
3278 continue;
3279 if (best == NULL)
3280 best = pkt_dev;
3281 else if (ktime_lt(pkt_dev->next_tx, best->next_tx))
3282 best = pkt_dev;
3283 }
3284 if_unlock(t);
3285 return best;
3286}
3287
3288static void pktgen_stop(struct pktgen_thread *t)
3289{
3290 struct pktgen_dev *pkt_dev;
3291
3292 pr_debug("pktgen: entering pktgen_stop\n");
3293
3294 if_lock(t);
3295
3296 list_for_each_entry(pkt_dev, &t->if_list, list) {
3297 pktgen_stop_device(pkt_dev);
3298 }
3299
3300 if_unlock(t);
3301}
3302
3303/*
3304 * one of our devices needs to be removed - find it
3305 * and remove it
3306 */
3307static void pktgen_rem_one_if(struct pktgen_thread *t)
3308{
3309 struct list_head *q, *n;
3310 struct pktgen_dev *cur;
3311
3312 pr_debug("pktgen: entering pktgen_rem_one_if\n");
3313
3314 if_lock(t);
3315
3316 list_for_each_safe(q, n, &t->if_list) {
3317 cur = list_entry(q, struct pktgen_dev, list);
3318
3319 if (!cur->removal_mark)
3320 continue;
3321
3322 kfree_skb(cur->skb);
3323 cur->skb = NULL;
3324
3325 pktgen_remove_device(t, cur);
3326
3327 break;
3328 }
3329
3330 if_unlock(t);
3331}
3332
3333static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3334{
3335 struct list_head *q, *n;
3336 struct pktgen_dev *cur;
3337
3338 /* Remove all devices, free mem */
3339
3340 pr_debug("pktgen: entering pktgen_rem_all_ifs\n");
3341 if_lock(t);
3342
3343 list_for_each_safe(q, n, &t->if_list) {
3344 cur = list_entry(q, struct pktgen_dev, list);
3345
3346 kfree_skb(cur->skb);
3347 cur->skb = NULL;
3348
3349 pktgen_remove_device(t, cur);
3350 }
3351
3352 if_unlock(t);
3353}
3354
3355static void pktgen_rem_thread(struct pktgen_thread *t)
3356{
3357 /* Remove from the thread list */
3358
3359 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3360
3361 mutex_lock(&pktgen_thread_lock);
3362
3363 list_del(&t->th_list);
3364
3365 mutex_unlock(&pktgen_thread_lock);
3366}
3367
3368static void idle(struct pktgen_dev *pkt_dev)
3369{
3370 ktime_t idle_start = ktime_now();
3371
3372 if (need_resched())
3373 schedule();
3374 else
3375 cpu_relax();
3376
3377 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3378}
3379
3380
3381static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3382{
3383 struct net_device *odev = pkt_dev->odev;
3384 int (*xmit)(struct sk_buff *, struct net_device *)
3385 = odev->netdev_ops->ndo_start_xmit;
3386 struct netdev_queue *txq;
3387 u16 queue_map;
3388 int ret;
3389
3390 if (pkt_dev->delay) {
3391 spin(pkt_dev, pkt_dev->next_tx);
3392
3393 /* This is max DELAY, this has special meaning of
3394 * "never transmit"
3395 */
3396 if (pkt_dev->delay == ULLONG_MAX) {
3397 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX);
3398 return;
3399 }
3400 }
3401
3402 if (!pkt_dev->skb) {
3403 set_cur_queue_map(pkt_dev);
3404 queue_map = pkt_dev->cur_queue_map;
3405 } else {
3406 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3407 }
3408
3409 txq = netdev_get_tx_queue(odev, queue_map);
3410 /* Did we saturate the queue already? */
3411 if (netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq)) {
3412 /* If device is down, then all queues are permnantly frozen */
3413 if (netif_running(odev))
3414 idle(pkt_dev);
3415 else
3416 pktgen_stop_device(pkt_dev);
3417 return;
3418 }
3419
3420 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3421 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3422 /* build a new pkt */
3423 kfree_skb(pkt_dev->skb);
3424
3425 pkt_dev->skb = fill_packet(odev, pkt_dev);
3426 if (pkt_dev->skb == NULL) {
3427 printk(KERN_ERR "pktgen: ERROR: couldn't "
3428 "allocate skb in fill_packet.\n");
3429 schedule();
3430 pkt_dev->clone_count--; /* back out increment, OOM */
3431 return;
3432 }
3433
3434 pkt_dev->allocated_skbs++;
3435 pkt_dev->clone_count = 0; /* reset counter */
3436 }
3437
3438 /* fill_packet() might have changed the queue */
3439 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3440 txq = netdev_get_tx_queue(odev, queue_map);
3441
3442 __netif_tx_lock_bh(txq);
3443 if (unlikely(netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq)))
3444 pkt_dev->last_ok = 0;
3445 else {
3446 atomic_inc(&(pkt_dev->skb->users));
3447
3448 retry_now:
3449 ret = (*xmit)(pkt_dev->skb, odev);
3450 switch (ret) {
3451 case NETDEV_TX_OK:
3452 txq_trans_update(txq);
3453 pkt_dev->last_ok = 1;
3454 pkt_dev->sofar++;
3455 pkt_dev->seq_num++;
3456 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size;
3457 break;
3458 case NETDEV_TX_LOCKED:
3459 cpu_relax();
3460 goto retry_now;
3461 default: /* Drivers are not supposed to return other values! */
3462 if (net_ratelimit())
3463 pr_info("pktgen: %s xmit error: %d\n",
3464 odev->name, ret);
3465 pkt_dev->errors++;
3466 /* fallthru */
3467 case NETDEV_TX_BUSY:
3468 /* Retry it next time */
3469 atomic_dec(&(pkt_dev->skb->users));
3470 pkt_dev->last_ok = 0;
3471 }
3472
3473 if (pkt_dev->delay)
3474 pkt_dev->next_tx = ktime_add_ns(ktime_now(),
3475 pkt_dev->delay);
3476 }
3477 __netif_tx_unlock_bh(txq);
3478
3479 /* If pkt_dev->count is zero, then run forever */
3480 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3481 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3482 if (signal_pending(current))
3483 break;
3484 idle(pkt_dev);
3485 }
3486
3487 /* Done with this */
3488 pktgen_stop_device(pkt_dev);
3489 }
3490}
3491
3492/*
3493 * Main loop of the thread goes here
3494 */
3495
3496static int pktgen_thread_worker(void *arg)
3497{
3498 DEFINE_WAIT(wait);
3499 struct pktgen_thread *t = arg;
3500 struct pktgen_dev *pkt_dev = NULL;
3501 int cpu = t->cpu;
3502
3503 BUG_ON(smp_processor_id() != cpu);
3504
3505 init_waitqueue_head(&t->queue);
3506 complete(&t->start_done);
3507
3508 pr_debug("pktgen: starting pktgen/%d: pid=%d\n",
3509 cpu, task_pid_nr(current));
3510
3511 set_current_state(TASK_INTERRUPTIBLE);
3512
3513 set_freezable();
3514
3515 while (!kthread_should_stop()) {
3516 pkt_dev = next_to_run(t);
3517
3518 if (!pkt_dev &&
3519 (t->control & (T_STOP | T_RUN | T_REMDEVALL | T_REMDEV))
3520 == 0) {
3521 prepare_to_wait(&(t->queue), &wait,
3522 TASK_INTERRUPTIBLE);
3523 schedule_timeout(HZ / 10);
3524 finish_wait(&(t->queue), &wait);
3525 }
3526
3527 __set_current_state(TASK_RUNNING);
3528
3529 if (pkt_dev)
3530 pktgen_xmit(pkt_dev);
3531
3532 if (t->control & T_STOP) {
3533 pktgen_stop(t);
3534 t->control &= ~(T_STOP);
3535 }
3536
3537 if (t->control & T_RUN) {
3538 pktgen_run(t);
3539 t->control &= ~(T_RUN);
3540 }
3541
3542 if (t->control & T_REMDEVALL) {
3543 pktgen_rem_all_ifs(t);
3544 t->control &= ~(T_REMDEVALL);
3545 }
3546
3547 if (t->control & T_REMDEV) {
3548 pktgen_rem_one_if(t);
3549 t->control &= ~(T_REMDEV);
3550 }
3551
3552 try_to_freeze();
3553
3554 set_current_state(TASK_INTERRUPTIBLE);
3555 }
3556
3557 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm);
3558 pktgen_stop(t);
3559
3560 pr_debug("pktgen: %s removing all device\n", t->tsk->comm);
3561 pktgen_rem_all_ifs(t);
3562
3563 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm);
3564 pktgen_rem_thread(t);
3565
3566 return 0;
3567}
3568
3569static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3570 const char *ifname)
3571{
3572 struct pktgen_dev *p, *pkt_dev = NULL;
3573 if_lock(t);
3574
3575 list_for_each_entry(p, &t->if_list, list)
3576 if (strncmp(p->odev->name, ifname, IFNAMSIZ) == 0) {
3577 pkt_dev = p;
3578 break;
3579 }
3580
3581 if_unlock(t);
3582 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev);
3583 return pkt_dev;
3584}
3585
3586/*
3587 * Adds a dev at front of if_list.
3588 */
3589
3590static int add_dev_to_thread(struct pktgen_thread *t,
3591 struct pktgen_dev *pkt_dev)
3592{
3593 int rv = 0;
3594
3595 if_lock(t);
3596
3597 if (pkt_dev->pg_thread) {
3598 printk(KERN_ERR "pktgen: ERROR: already assigned "
3599 "to a thread.\n");
3600 rv = -EBUSY;
3601 goto out;
3602 }
3603
3604 list_add(&pkt_dev->list, &t->if_list);
3605 pkt_dev->pg_thread = t;
3606 pkt_dev->running = 0;
3607
3608out:
3609 if_unlock(t);
3610 return rv;
3611}
3612
3613/* Called under thread lock */
3614
3615static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3616{
3617 struct pktgen_dev *pkt_dev;
3618 int err;
3619
3620 /* We don't allow a device to be on several threads */
3621
3622 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3623 if (pkt_dev) {
3624 printk(KERN_ERR "pktgen: ERROR: interface already used.\n");
3625 return -EBUSY;
3626 }
3627
3628 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
3629 if (!pkt_dev)
3630 return -ENOMEM;
3631
3632 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state));
3633 if (pkt_dev->flows == NULL) {
3634 kfree(pkt_dev);
3635 return -ENOMEM;
3636 }
3637 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3638
3639 pkt_dev->removal_mark = 0;
3640 pkt_dev->min_pkt_size = ETH_ZLEN;
3641 pkt_dev->max_pkt_size = ETH_ZLEN;
3642 pkt_dev->nfrags = 0;
3643 pkt_dev->clone_skb = pg_clone_skb_d;
3644 pkt_dev->delay = pg_delay_d;
3645 pkt_dev->count = pg_count_d;
3646 pkt_dev->sofar = 0;
3647 pkt_dev->udp_src_min = 9; /* sink port */
3648 pkt_dev->udp_src_max = 9;
3649 pkt_dev->udp_dst_min = 9;
3650 pkt_dev->udp_dst_max = 9;
3651
3652 pkt_dev->vlan_p = 0;
3653 pkt_dev->vlan_cfi = 0;
3654 pkt_dev->vlan_id = 0xffff;
3655 pkt_dev->svlan_p = 0;
3656 pkt_dev->svlan_cfi = 0;
3657 pkt_dev->svlan_id = 0xffff;
3658
3659 err = pktgen_setup_dev(pkt_dev, ifname);
3660 if (err)
3661 goto out1;
3662
3663 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3664 &pktgen_if_fops, pkt_dev);
3665 if (!pkt_dev->entry) {
3666 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3667 PG_PROC_DIR, ifname);
3668 err = -EINVAL;
3669 goto out2;
3670 }
3671#ifdef CONFIG_XFRM
3672 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3673 pkt_dev->ipsproto = IPPROTO_ESP;
3674#endif
3675
3676 return add_dev_to_thread(t, pkt_dev);
3677out2:
3678 dev_put(pkt_dev->odev);
3679out1:
3680#ifdef CONFIG_XFRM
3681 free_SAs(pkt_dev);
3682#endif
3683 vfree(pkt_dev->flows);
3684 kfree(pkt_dev);
3685 return err;
3686}
3687
3688static int __init pktgen_create_thread(int cpu)
3689{
3690 struct pktgen_thread *t;
3691 struct proc_dir_entry *pe;
3692 struct task_struct *p;
3693
3694 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL);
3695 if (!t) {
3696 printk(KERN_ERR "pktgen: ERROR: out of memory, can't "
3697 "create new thread.\n");
3698 return -ENOMEM;
3699 }
3700
3701 spin_lock_init(&t->if_lock);
3702 t->cpu = cpu;
3703
3704 INIT_LIST_HEAD(&t->if_list);
3705
3706 list_add_tail(&t->th_list, &pktgen_threads);
3707 init_completion(&t->start_done);
3708
3709 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu);
3710 if (IS_ERR(p)) {
3711 printk(KERN_ERR "pktgen: kernel_thread() failed "
3712 "for cpu %d\n", t->cpu);
3713 list_del(&t->th_list);
3714 kfree(t);
3715 return PTR_ERR(p);
3716 }
3717 kthread_bind(p, cpu);
3718 t->tsk = p;
3719
3720 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3721 &pktgen_thread_fops, t);
3722 if (!pe) {
3723 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3724 PG_PROC_DIR, t->tsk->comm);
3725 kthread_stop(p);
3726 list_del(&t->th_list);
3727 kfree(t);
3728 return -EINVAL;
3729 }
3730
3731 wake_up_process(p);
3732 wait_for_completion(&t->start_done);
3733
3734 return 0;
3735}
3736
3737/*
3738 * Removes a device from the thread if_list.
3739 */
3740static void _rem_dev_from_if_list(struct pktgen_thread *t,
3741 struct pktgen_dev *pkt_dev)
3742{
3743 struct list_head *q, *n;
3744 struct pktgen_dev *p;
3745
3746 list_for_each_safe(q, n, &t->if_list) {
3747 p = list_entry(q, struct pktgen_dev, list);
3748 if (p == pkt_dev)
3749 list_del(&p->list);
3750 }
3751}
3752
3753static int pktgen_remove_device(struct pktgen_thread *t,
3754 struct pktgen_dev *pkt_dev)
3755{
3756
3757 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev);
3758
3759 if (pkt_dev->running) {
3760 printk(KERN_WARNING "pktgen: WARNING: trying to remove a "
3761 "running interface, stopping it now.\n");
3762 pktgen_stop_device(pkt_dev);
3763 }
3764
3765 /* Dis-associate from the interface */
3766
3767 if (pkt_dev->odev) {
3768 dev_put(pkt_dev->odev);
3769 pkt_dev->odev = NULL;
3770 }
3771
3772 /* And update the thread if_list */
3773
3774 _rem_dev_from_if_list(t, pkt_dev);
3775
3776 if (pkt_dev->entry)
3777 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3778
3779#ifdef CONFIG_XFRM
3780 free_SAs(pkt_dev);
3781#endif
3782 vfree(pkt_dev->flows);
3783 kfree(pkt_dev);
3784 return 0;
3785}
3786
3787static int __init pg_init(void)
3788{
3789 int cpu;
3790 struct proc_dir_entry *pe;
3791
3792 printk(KERN_INFO "%s", version);
3793
3794 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3795 if (!pg_proc_dir)
3796 return -ENODEV;
3797
3798 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3799 if (pe == NULL) {
3800 printk(KERN_ERR "pktgen: ERROR: cannot create %s "
3801 "procfs entry.\n", PGCTRL);
3802 proc_net_remove(&init_net, PG_PROC_DIR);
3803 return -EINVAL;
3804 }
3805
3806 /* Register us to receive netdevice events */
3807 register_netdevice_notifier(&pktgen_notifier_block);
3808
3809 for_each_online_cpu(cpu) {
3810 int err;
3811
3812 err = pktgen_create_thread(cpu);
3813 if (err)
3814 printk(KERN_WARNING "pktgen: WARNING: Cannot create "
3815 "thread for cpu %d (%d)\n", cpu, err);
3816 }
3817
3818 if (list_empty(&pktgen_threads)) {
3819 printk(KERN_ERR "pktgen: ERROR: Initialization failed for "
3820 "all threads\n");
3821 unregister_netdevice_notifier(&pktgen_notifier_block);
3822 remove_proc_entry(PGCTRL, pg_proc_dir);
3823 proc_net_remove(&init_net, PG_PROC_DIR);
3824 return -ENODEV;
3825 }
3826
3827 return 0;
3828}
3829
3830static void __exit pg_cleanup(void)
3831{
3832 struct pktgen_thread *t;
3833 struct list_head *q, *n;
3834 wait_queue_head_t queue;
3835 init_waitqueue_head(&queue);
3836
3837 /* Stop all interfaces & threads */
3838
3839 list_for_each_safe(q, n, &pktgen_threads) {
3840 t = list_entry(q, struct pktgen_thread, th_list);
3841 kthread_stop(t->tsk);
3842 kfree(t);
3843 }
3844
3845 /* Un-register us from receiving netdevice events */
3846 unregister_netdevice_notifier(&pktgen_notifier_block);
3847
3848 /* Clean up proc file system */
3849 remove_proc_entry(PGCTRL, pg_proc_dir);
3850 proc_net_remove(&init_net, PG_PROC_DIR);
3851}
3852
3853module_init(pg_init);
3854module_exit(pg_cleanup);
3855
3856MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3857MODULE_DESCRIPTION("Packet Generator tool");
3858MODULE_LICENSE("GPL");
3859MODULE_VERSION(VERSION);
3860module_param(pg_count_d, int, 0);
3861MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3862module_param(pg_delay_d, int, 0);
3863MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3864module_param(pg_clone_skb_d, int, 0);
3865MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3866module_param(debug, int, 0);
3867MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
kernel source for telekom puls (alcatel/mediatek)