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x86: Move the AMD64 specific parts out of setup_64.c
[linux-2.6/btrfs-unstable.git] / net / core / pktgen.c
blobfdf537707e51afd9099df2693d4e5f5af668ba5a
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/freezer.h>
135 #include <linux/delay.h>
136 #include <linux/timer.h>
137 #include <linux/list.h>
138 #include <linux/init.h>
139 #include <linux/skbuff.h>
140 #include <linux/netdevice.h>
141 #include <linux/inet.h>
142 #include <linux/inetdevice.h>
143 #include <linux/rtnetlink.h>
144 #include <linux/if_arp.h>
145 #include <linux/if_vlan.h>
146 #include <linux/in.h>
147 #include <linux/ip.h>
148 #include <linux/ipv6.h>
149 #include <linux/udp.h>
150 #include <linux/proc_fs.h>
151 #include <linux/seq_file.h>
152 #include <linux/wait.h>
153 #include <linux/etherdevice.h>
154 #include <linux/kthread.h>
155 #include <net/net_namespace.h>
156 #include <net/checksum.h>
157 #include <net/ipv6.h>
158 #include <net/addrconf.h>
159 #ifdef CONFIG_XFRM
160 #include <net/xfrm.h>
161 #endif
162 #include <asm/byteorder.h>
163 #include <linux/rcupdate.h>
164 #include <linux/bitops.h>
165 #include <asm/io.h>
166 #include <asm/dma.h>
167 #include <asm/uaccess.h>
168 #include <asm/div64.h> /* do_div */
169 #include <asm/timex.h>
170
171 #define VERSION "pktgen v2.69: Packet Generator for packet performance testing.\n"
172
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
193 /* Thread control flag bits */
194 #define T_TERMINATE (1<<0)
195 #define T_STOP (1<<1) /* Stop run */
196 #define T_RUN (1<<2) /* Start run */
197 #define T_REMDEVALL (1<<3) /* Remove all devs */
198 #define T_REMDEV (1<<4) /* Remove one dev */
199
200 /* If lock -- can be removed after some work */
201 #define if_lock(t) spin_lock(&(t->if_lock));
202 #define if_unlock(t) spin_unlock(&(t->if_lock));
203
204 /* Used to help with determining the pkts on receive */
205 #define PKTGEN_MAGIC 0xbe9be955
206 #define PG_PROC_DIR "pktgen"
207 #define PGCTRL "pgctrl"
208 static struct proc_dir_entry *pg_proc_dir = NULL;
209
210 #define MAX_CFLOWS 65536
211
212 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
213 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
214
215 struct flow_state {
216 __be32 cur_daddr;
217 int count;
218 #ifdef CONFIG_XFRM
219 struct xfrm_state *x;
220 #endif
221 __u32 flags;
222 };
223
224 /* flow flag bits */
225 #define F_INIT (1<<0) /* flow has been initialized */
226
227 struct pktgen_dev {
228 /*
229 * Try to keep frequent/infrequent used vars. separated.
230 */
231 struct proc_dir_entry *entry; /* proc file */
232 struct pktgen_thread *pg_thread;/* the owner */
233 struct list_head list; /* Used for chaining in the thread's run-queue */
234
235 int running; /* if this changes to false, the test will stop */
236
237 /* If min != max, then we will either do a linear iteration, or
238 * we will do a random selection from within the range.
239 */
240 __u32 flags;
241 int removal_mark; /* non-zero => the device is marked for
242 * removal by worker thread */
243
244 int min_pkt_size; /* = ETH_ZLEN; */
245 int max_pkt_size; /* = ETH_ZLEN; */
246 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
247 int nfrags;
248 __u32 delay_us; /* Default delay */
249 __u32 delay_ns;
250 __u64 count; /* Default No packets to send */
251 __u64 sofar; /* How many pkts we've sent so far */
252 __u64 tx_bytes; /* How many bytes we've transmitted */
253 __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */
254
255 /* runtime counters relating to clone_skb */
256 __u64 next_tx_us; /* timestamp of when to tx next */
257 __u32 next_tx_ns;
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? This will keep
263 * sequence numbers in order, for example.
264 */
265 __u64 started_at; /* micro-seconds */
266 __u64 stopped_at; /* micro-seconds */
267 __u64 idle_acc; /* micro-seconds */
268 __u32 seq_num;
269
270 int clone_skb; /* Use multiple SKBs during packet gen. If this number
271 * is greater than 1, then that many copies of the same
272 * packet will be sent before a new packet is allocated.
273 * For instance, if you want to send 1024 identical packets
274 * before creating a new packet, set clone_skb to 1024.
275 */
276
277 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
278 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
279 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
280 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
281
282 struct in6_addr in6_saddr;
283 struct in6_addr in6_daddr;
284 struct in6_addr cur_in6_daddr;
285 struct in6_addr cur_in6_saddr;
286 /* For ranges */
287 struct in6_addr min_in6_daddr;
288 struct in6_addr max_in6_daddr;
289 struct in6_addr min_in6_saddr;
290 struct in6_addr max_in6_saddr;
291
292 /* If we're doing ranges, random or incremental, then this
293 * defines the min/max for those ranges.
294 */
295 __be32 saddr_min; /* inclusive, source IP address */
296 __be32 saddr_max; /* exclusive, source IP address */
297 __be32 daddr_min; /* inclusive, dest IP address */
298 __be32 daddr_max; /* exclusive, dest IP address */
299
300 __u16 udp_src_min; /* inclusive, source UDP port */
301 __u16 udp_src_max; /* exclusive, source UDP port */
302 __u16 udp_dst_min; /* inclusive, dest UDP port */
303 __u16 udp_dst_max; /* exclusive, dest UDP port */
304
305 /* DSCP + ECN */
306 __u8 tos; /* six most significant bits of (former) IPv4 TOS are for dscp codepoint */
307 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 (see RFC 3260, sec. 4) */
308
309 /* MPLS */
310 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
311 __be32 labels[MAX_MPLS_LABELS];
312
313 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
314 __u8 vlan_p;
315 __u8 vlan_cfi;
316 __u16 vlan_id; /* 0xffff means no vlan tag */
317
318 __u8 svlan_p;
319 __u8 svlan_cfi;
320 __u16 svlan_id; /* 0xffff means no svlan tag */
321
322 __u32 src_mac_count; /* How many MACs to iterate through */
323 __u32 dst_mac_count; /* How many MACs to iterate through */
324
325 unsigned char dst_mac[ETH_ALEN];
326 unsigned char src_mac[ETH_ALEN];
327
328 __u32 cur_dst_mac_offset;
329 __u32 cur_src_mac_offset;
330 __be32 cur_saddr;
331 __be32 cur_daddr;
332 __u16 cur_udp_dst;
333 __u16 cur_udp_src;
334 __u16 cur_queue_map;
335 __u32 cur_pkt_size;
336
337 __u8 hh[14];
338 /* = {
339 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
340
341 We fill in SRC address later
342 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
343 0x08, 0x00
344 };
345 */
346 __u16 pad; /* pad out the hh struct to an even 16 bytes */
347
348 struct sk_buff *skb; /* skb we are to transmit next, mainly used for when we
349 * are transmitting the same one multiple times
350 */
351 struct net_device *odev; /* The out-going device. Note that the device should
352 * have it's pg_info pointer pointing back to this
353 * device. This will be set when the user specifies
354 * the out-going device name (not when the inject is
355 * started as it used to do.)
356 */
357 struct flow_state *flows;
358 unsigned cflows; /* Concurrent flows (config) */
359 unsigned lflow; /* Flow length (config) */
360 unsigned nflows; /* accumulated flows (stats) */
361 unsigned curfl; /* current sequenced flow (state)*/
362
363 u16 queue_map_min;
364 u16 queue_map_max;
365
366 #ifdef CONFIG_XFRM
367 __u8 ipsmode; /* IPSEC mode (config) */
368 __u8 ipsproto; /* IPSEC type (config) */
369 #endif
370 char result[512];
371 };
372
373 struct pktgen_hdr {
374 __be32 pgh_magic;
375 __be32 seq_num;
376 __be32 tv_sec;
377 __be32 tv_usec;
378 };
379
380 struct pktgen_thread {
381 spinlock_t if_lock;
382 struct list_head if_list; /* All device here */
383 struct list_head th_list;
384 struct task_struct *tsk;
385 char result[512];
386
387 /* Field for thread to receive "posted" events terminate, stop ifs etc. */
388
389 u32 control;
390 int cpu;
391
392 wait_queue_head_t queue;
393 struct completion start_done;
394 };
395
396 #define REMOVE 1
397 #define FIND 0
398
399 /** Convert to micro-seconds */
400 static inline __u64 tv_to_us(const struct timeval *tv)
401 {
402 __u64 us = tv->tv_usec;
403 us += (__u64) tv->tv_sec * (__u64) 1000000;
404 return us;
405 }
406
407 static __u64 getCurUs(void)
408 {
409 struct timeval tv;
410 do_gettimeofday(&tv);
411 return tv_to_us(&tv);
412 }
413
414 /* old include end */
415
416 static char version[] __initdata = VERSION;
417
418 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
419 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
420 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
421 const char *ifname);
422 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
423 static void pktgen_run_all_threads(void);
424 static void pktgen_stop_all_threads_ifs(void);
425 static int pktgen_stop_device(struct pktgen_dev *pkt_dev);
426 static void pktgen_stop(struct pktgen_thread *t);
427 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
428
429 static unsigned int scan_ip6(const char *s, char ip[16]);
430 static unsigned int fmt_ip6(char *s, const char ip[16]);
431
432 /* Module parameters, defaults. */
433 static int pg_count_d = 1000; /* 1000 pkts by default */
434 static int pg_delay_d;
435 static int pg_clone_skb_d;
436 static int debug;
437
438 static DEFINE_MUTEX(pktgen_thread_lock);
439 static LIST_HEAD(pktgen_threads);
440
441 static struct notifier_block pktgen_notifier_block = {
442 .notifier_call = pktgen_device_event,
443 };
444
445 /*
446 * /proc handling functions
447 *
448 */
449
450 static int pgctrl_show(struct seq_file *seq, void *v)
451 {
452 seq_puts(seq, VERSION);
453 return 0;
454 }
455
456 static ssize_t pgctrl_write(struct file *file, const char __user * buf,
457 size_t count, loff_t * ppos)
458 {
459 int err = 0;
460 char data[128];
461
462 if (!capable(CAP_NET_ADMIN)) {
463 err = -EPERM;
464 goto out;
465 }
466
467 if (count > sizeof(data))
468 count = sizeof(data);
469
470 if (copy_from_user(data, buf, count)) {
471 err = -EFAULT;
472 goto out;
473 }
474 data[count - 1] = 0; /* Make string */
475
476 if (!strcmp(data, "stop"))
477 pktgen_stop_all_threads_ifs();
478
479 else if (!strcmp(data, "start"))
480 pktgen_run_all_threads();
481
482 else
483 printk(KERN_WARNING "pktgen: Unknown command: %s\n", data);
484
485 err = count;
486
487 out:
488 return err;
489 }
490
491 static int pgctrl_open(struct inode *inode, struct file *file)
492 {
493 return single_open(file, pgctrl_show, PDE(inode)->data);
494 }
495
496 static const struct file_operations pktgen_fops = {
497 .owner = THIS_MODULE,
498 .open = pgctrl_open,
499 .read = seq_read,
500 .llseek = seq_lseek,
501 .write = pgctrl_write,
502 .release = single_release,
503 };
504
505 static int pktgen_if_show(struct seq_file *seq, void *v)
506 {
507 struct pktgen_dev *pkt_dev = seq->private;
508 __u64 sa;
509 __u64 stopped;
510 __u64 now = getCurUs();
511 DECLARE_MAC_BUF(mac);
512
513 seq_printf(seq,
514 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
515 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
516 pkt_dev->max_pkt_size);
517
518 seq_printf(seq,
519 " frags: %d delay: %u clone_skb: %d ifname: %s\n",
520 pkt_dev->nfrags,
521 1000 * pkt_dev->delay_us + pkt_dev->delay_ns,
522 pkt_dev->clone_skb, pkt_dev->odev->name);
523
524 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
525 pkt_dev->lflow);
526
527 seq_printf(seq,
528 " queue_map_min: %u queue_map_max: %u\n",
529 pkt_dev->queue_map_min,
530 pkt_dev->queue_map_max);
531
532 if (pkt_dev->flags & F_IPV6) {
533 char b1[128], b2[128], b3[128];
534 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
535 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
536 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
537 seq_printf(seq,
538 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
539 b2, b3);
540
541 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
542 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
543 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
544 seq_printf(seq,
545 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
546 b2, b3);
547
548 } else
549 seq_printf(seq,
550 " dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n",
551 pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min,
552 pkt_dev->src_max);
553
554 seq_puts(seq, " src_mac: ");
555
556 seq_printf(seq, "%s ",
557 print_mac(mac, is_zero_ether_addr(pkt_dev->src_mac) ?
558 pkt_dev->odev->dev_addr : pkt_dev->src_mac));
559
560 seq_printf(seq, "dst_mac: ");
561 seq_printf(seq, "%s\n", print_mac(mac, pkt_dev->dst_mac));
562
563 seq_printf(seq,
564 " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n",
565 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
566 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
567
568 seq_printf(seq,
569 " src_mac_count: %d dst_mac_count: %d\n",
570 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
571
572 if (pkt_dev->nr_labels) {
573 unsigned i;
574 seq_printf(seq, " mpls: ");
575 for (i = 0; i < pkt_dev->nr_labels; i++)
576 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
577 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
578 }
579
580 if (pkt_dev->vlan_id != 0xffff) {
581 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
582 pkt_dev->vlan_id, pkt_dev->vlan_p, pkt_dev->vlan_cfi);
583 }
584
585 if (pkt_dev->svlan_id != 0xffff) {
586 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
587 pkt_dev->svlan_id, pkt_dev->svlan_p, pkt_dev->svlan_cfi);
588 }
589
590 if (pkt_dev->tos) {
591 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
592 }
593
594 if (pkt_dev->traffic_class) {
595 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
596 }
597
598 seq_printf(seq, " Flags: ");
599
600 if (pkt_dev->flags & F_IPV6)
601 seq_printf(seq, "IPV6 ");
602
603 if (pkt_dev->flags & F_IPSRC_RND)
604 seq_printf(seq, "IPSRC_RND ");
605
606 if (pkt_dev->flags & F_IPDST_RND)
607 seq_printf(seq, "IPDST_RND ");
608
609 if (pkt_dev->flags & F_TXSIZE_RND)
610 seq_printf(seq, "TXSIZE_RND ");
611
612 if (pkt_dev->flags & F_UDPSRC_RND)
613 seq_printf(seq, "UDPSRC_RND ");
614
615 if (pkt_dev->flags & F_UDPDST_RND)
616 seq_printf(seq, "UDPDST_RND ");
617
618 if (pkt_dev->flags & F_MPLS_RND)
619 seq_printf(seq, "MPLS_RND ");
620
621 if (pkt_dev->flags & F_QUEUE_MAP_RND)
622 seq_printf(seq, "QUEUE_MAP_RND ");
623
624 if (pkt_dev->cflows) {
625 if (pkt_dev->flags & F_FLOW_SEQ)
626 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
627 else
628 seq_printf(seq, "FLOW_RND ");
629 }
630
631 #ifdef CONFIG_XFRM
632 if (pkt_dev->flags & F_IPSEC_ON)
633 seq_printf(seq, "IPSEC ");
634 #endif
635
636 if (pkt_dev->flags & F_MACSRC_RND)
637 seq_printf(seq, "MACSRC_RND ");
638
639 if (pkt_dev->flags & F_MACDST_RND)
640 seq_printf(seq, "MACDST_RND ");
641
642 if (pkt_dev->flags & F_VID_RND)
643 seq_printf(seq, "VID_RND ");
644
645 if (pkt_dev->flags & F_SVID_RND)
646 seq_printf(seq, "SVID_RND ");
647
648 seq_puts(seq, "\n");
649
650 sa = pkt_dev->started_at;
651 stopped = pkt_dev->stopped_at;
652 if (pkt_dev->running)
653 stopped = now; /* not really stopped, more like last-running-at */
654
655 seq_printf(seq,
656 "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n",
657 (unsigned long long)pkt_dev->sofar,
658 (unsigned long long)pkt_dev->errors, (unsigned long long)sa,
659 (unsigned long long)stopped,
660 (unsigned long long)pkt_dev->idle_acc);
661
662 seq_printf(seq,
663 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
664 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
665 pkt_dev->cur_src_mac_offset);
666
667 if (pkt_dev->flags & F_IPV6) {
668 char b1[128], b2[128];
669 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
670 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
671 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
672 } else
673 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
674 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
675
676 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
677 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
678
679 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
680
681 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
682
683 if (pkt_dev->result[0])
684 seq_printf(seq, "Result: %s\n", pkt_dev->result);
685 else
686 seq_printf(seq, "Result: Idle\n");
687
688 return 0;
689 }
690
691
692 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, __u32 *num)
693 {
694 int i = 0;
695 *num = 0;
696
697 for (; i < maxlen; i++) {
698 char c;
699 *num <<= 4;
700 if (get_user(c, &user_buffer[i]))
701 return -EFAULT;
702 if ((c >= '0') && (c <= '9'))
703 *num |= c - '0';
704 else if ((c >= 'a') && (c <= 'f'))
705 *num |= c - 'a' + 10;
706 else if ((c >= 'A') && (c <= 'F'))
707 *num |= c - 'A' + 10;
708 else
709 break;
710 }
711 return i;
712 }
713
714 static int count_trail_chars(const char __user * user_buffer,
715 unsigned int maxlen)
716 {
717 int i;
718
719 for (i = 0; i < maxlen; i++) {
720 char c;
721 if (get_user(c, &user_buffer[i]))
722 return -EFAULT;
723 switch (c) {
724 case '\"':
725 case '\n':
726 case '\r':
727 case '\t':
728 case ' ':
729 case '=':
730 break;
731 default:
732 goto done;
733 }
734 }
735 done:
736 return i;
737 }
738
739 static unsigned long num_arg(const char __user * user_buffer,
740 unsigned long maxlen, unsigned long *num)
741 {
742 int i = 0;
743 *num = 0;
744
745 for (; i < maxlen; i++) {
746 char c;
747 if (get_user(c, &user_buffer[i]))
748 return -EFAULT;
749 if ((c >= '0') && (c <= '9')) {
750 *num *= 10;
751 *num += c - '0';
752 } else
753 break;
754 }
755 return i;
756 }
757
758 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
759 {
760 int i = 0;
761
762 for (; i < maxlen; i++) {
763 char c;
764 if (get_user(c, &user_buffer[i]))
765 return -EFAULT;
766 switch (c) {
767 case '\"':
768 case '\n':
769 case '\r':
770 case '\t':
771 case ' ':
772 goto done_str;
773 break;
774 default:
775 break;
776 }
777 }
778 done_str:
779 return i;
780 }
781
782 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
783 {
784 unsigned n = 0;
785 char c;
786 ssize_t i = 0;
787 int len;
788
789 pkt_dev->nr_labels = 0;
790 do {
791 __u32 tmp;
792 len = hex32_arg(&buffer[i], 8, &tmp);
793 if (len <= 0)
794 return len;
795 pkt_dev->labels[n] = htonl(tmp);
796 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
797 pkt_dev->flags |= F_MPLS_RND;
798 i += len;
799 if (get_user(c, &buffer[i]))
800 return -EFAULT;
801 i++;
802 n++;
803 if (n >= MAX_MPLS_LABELS)
804 return -E2BIG;
805 } while (c == ',');
806
807 pkt_dev->nr_labels = n;
808 return i;
809 }
810
811 static ssize_t pktgen_if_write(struct file *file,
812 const char __user * user_buffer, size_t count,
813 loff_t * offset)
814 {
815 struct seq_file *seq = (struct seq_file *)file->private_data;
816 struct pktgen_dev *pkt_dev = seq->private;
817 int i = 0, max, len;
818 char name[16], valstr[32];
819 unsigned long value = 0;
820 char *pg_result = NULL;
821 int tmp = 0;
822 char buf[128];
823
824 pg_result = &(pkt_dev->result[0]);
825
826 if (count < 1) {
827 printk(KERN_WARNING "pktgen: wrong command format\n");
828 return -EINVAL;
829 }
830
831 max = count - i;
832 tmp = count_trail_chars(&user_buffer[i], max);
833 if (tmp < 0) {
834 printk(KERN_WARNING "pktgen: illegal format\n");
835 return tmp;
836 }
837 i += tmp;
838
839 /* Read variable name */
840
841 len = strn_len(&user_buffer[i], sizeof(name) - 1);
842 if (len < 0) {
843 return len;
844 }
845 memset(name, 0, sizeof(name));
846 if (copy_from_user(name, &user_buffer[i], len))
847 return -EFAULT;
848 i += len;
849
850 max = count - i;
851 len = count_trail_chars(&user_buffer[i], max);
852 if (len < 0)
853 return len;
854
855 i += len;
856
857 if (debug) {
858 char tb[count + 1];
859 if (copy_from_user(tb, user_buffer, count))
860 return -EFAULT;
861 tb[count] = 0;
862 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name,
863 (unsigned long)count, tb);
864 }
865
866 if (!strcmp(name, "min_pkt_size")) {
867 len = num_arg(&user_buffer[i], 10, &value);
868 if (len < 0) {
869 return len;
870 }
871 i += len;
872 if (value < 14 + 20 + 8)
873 value = 14 + 20 + 8;
874 if (value != pkt_dev->min_pkt_size) {
875 pkt_dev->min_pkt_size = value;
876 pkt_dev->cur_pkt_size = value;
877 }
878 sprintf(pg_result, "OK: min_pkt_size=%u",
879 pkt_dev->min_pkt_size);
880 return count;
881 }
882
883 if (!strcmp(name, "max_pkt_size")) {
884 len = num_arg(&user_buffer[i], 10, &value);
885 if (len < 0) {
886 return len;
887 }
888 i += len;
889 if (value < 14 + 20 + 8)
890 value = 14 + 20 + 8;
891 if (value != pkt_dev->max_pkt_size) {
892 pkt_dev->max_pkt_size = value;
893 pkt_dev->cur_pkt_size = value;
894 }
895 sprintf(pg_result, "OK: max_pkt_size=%u",
896 pkt_dev->max_pkt_size);
897 return count;
898 }
899
900 /* Shortcut for min = max */
901
902 if (!strcmp(name, "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->min_pkt_size) {
911 pkt_dev->min_pkt_size = value;
912 pkt_dev->max_pkt_size = value;
913 pkt_dev->cur_pkt_size = value;
914 }
915 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
916 return count;
917 }
918
919 if (!strcmp(name, "debug")) {
920 len = num_arg(&user_buffer[i], 10, &value);
921 if (len < 0) {
922 return len;
923 }
924 i += len;
925 debug = value;
926 sprintf(pg_result, "OK: debug=%u", debug);
927 return count;
928 }
929
930 if (!strcmp(name, "frags")) {
931 len = num_arg(&user_buffer[i], 10, &value);
932 if (len < 0) {
933 return len;
934 }
935 i += len;
936 pkt_dev->nfrags = value;
937 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
938 return count;
939 }
940 if (!strcmp(name, "delay")) {
941 len = num_arg(&user_buffer[i], 10, &value);
942 if (len < 0) {
943 return len;
944 }
945 i += len;
946 if (value == 0x7FFFFFFF) {
947 pkt_dev->delay_us = 0x7FFFFFFF;
948 pkt_dev->delay_ns = 0;
949 } else {
950 pkt_dev->delay_us = value / 1000;
951 pkt_dev->delay_ns = value % 1000;
952 }
953 sprintf(pg_result, "OK: delay=%u",
954 1000 * pkt_dev->delay_us + pkt_dev->delay_ns);
955 return count;
956 }
957 if (!strcmp(name, "udp_src_min")) {
958 len = num_arg(&user_buffer[i], 10, &value);
959 if (len < 0) {
960 return len;
961 }
962 i += len;
963 if (value != pkt_dev->udp_src_min) {
964 pkt_dev->udp_src_min = value;
965 pkt_dev->cur_udp_src = value;
966 }
967 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
968 return count;
969 }
970 if (!strcmp(name, "udp_dst_min")) {
971 len = num_arg(&user_buffer[i], 10, &value);
972 if (len < 0) {
973 return len;
974 }
975 i += len;
976 if (value != pkt_dev->udp_dst_min) {
977 pkt_dev->udp_dst_min = value;
978 pkt_dev->cur_udp_dst = value;
979 }
980 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
981 return count;
982 }
983 if (!strcmp(name, "udp_src_max")) {
984 len = num_arg(&user_buffer[i], 10, &value);
985 if (len < 0) {
986 return len;
987 }
988 i += len;
989 if (value != pkt_dev->udp_src_max) {
990 pkt_dev->udp_src_max = value;
991 pkt_dev->cur_udp_src = value;
992 }
993 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
994 return count;
995 }
996 if (!strcmp(name, "udp_dst_max")) {
997 len = num_arg(&user_buffer[i], 10, &value);
998 if (len < 0) {
999 return len;
1000 }
1001 i += len;
1002 if (value != pkt_dev->udp_dst_max) {
1003 pkt_dev->udp_dst_max = value;
1004 pkt_dev->cur_udp_dst = value;
1005 }
1006 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1007 return count;
1008 }
1009 if (!strcmp(name, "clone_skb")) {
1010 len = num_arg(&user_buffer[i], 10, &value);
1011 if (len < 0) {
1012 return len;
1013 }
1014 i += len;
1015 pkt_dev->clone_skb = value;
1016
1017 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1018 return count;
1019 }
1020 if (!strcmp(name, "count")) {
1021 len = num_arg(&user_buffer[i], 10, &value);
1022 if (len < 0) {
1023 return len;
1024 }
1025 i += len;
1026 pkt_dev->count = value;
1027 sprintf(pg_result, "OK: count=%llu",
1028 (unsigned long long)pkt_dev->count);
1029 return count;
1030 }
1031 if (!strcmp(name, "src_mac_count")) {
1032 len = num_arg(&user_buffer[i], 10, &value);
1033 if (len < 0) {
1034 return len;
1035 }
1036 i += len;
1037 if (pkt_dev->src_mac_count != value) {
1038 pkt_dev->src_mac_count = value;
1039 pkt_dev->cur_src_mac_offset = 0;
1040 }
1041 sprintf(pg_result, "OK: src_mac_count=%d",
1042 pkt_dev->src_mac_count);
1043 return count;
1044 }
1045 if (!strcmp(name, "dst_mac_count")) {
1046 len = num_arg(&user_buffer[i], 10, &value);
1047 if (len < 0) {
1048 return len;
1049 }
1050 i += len;
1051 if (pkt_dev->dst_mac_count != value) {
1052 pkt_dev->dst_mac_count = value;
1053 pkt_dev->cur_dst_mac_offset = 0;
1054 }
1055 sprintf(pg_result, "OK: dst_mac_count=%d",
1056 pkt_dev->dst_mac_count);
1057 return count;
1058 }
1059 if (!strcmp(name, "flag")) {
1060 char f[32];
1061 memset(f, 0, 32);
1062 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1063 if (len < 0) {
1064 return len;
1065 }
1066 if (copy_from_user(f, &user_buffer[i], len))
1067 return -EFAULT;
1068 i += len;
1069 if (strcmp(f, "IPSRC_RND") == 0)
1070 pkt_dev->flags |= F_IPSRC_RND;
1071
1072 else if (strcmp(f, "!IPSRC_RND") == 0)
1073 pkt_dev->flags &= ~F_IPSRC_RND;
1074
1075 else if (strcmp(f, "TXSIZE_RND") == 0)
1076 pkt_dev->flags |= F_TXSIZE_RND;
1077
1078 else if (strcmp(f, "!TXSIZE_RND") == 0)
1079 pkt_dev->flags &= ~F_TXSIZE_RND;
1080
1081 else if (strcmp(f, "IPDST_RND") == 0)
1082 pkt_dev->flags |= F_IPDST_RND;
1083
1084 else if (strcmp(f, "!IPDST_RND") == 0)
1085 pkt_dev->flags &= ~F_IPDST_RND;
1086
1087 else if (strcmp(f, "UDPSRC_RND") == 0)
1088 pkt_dev->flags |= F_UDPSRC_RND;
1089
1090 else if (strcmp(f, "!UDPSRC_RND") == 0)
1091 pkt_dev->flags &= ~F_UDPSRC_RND;
1092
1093 else if (strcmp(f, "UDPDST_RND") == 0)
1094 pkt_dev->flags |= F_UDPDST_RND;
1095
1096 else if (strcmp(f, "!UDPDST_RND") == 0)
1097 pkt_dev->flags &= ~F_UDPDST_RND;
1098
1099 else if (strcmp(f, "MACSRC_RND") == 0)
1100 pkt_dev->flags |= F_MACSRC_RND;
1101
1102 else if (strcmp(f, "!MACSRC_RND") == 0)
1103 pkt_dev->flags &= ~F_MACSRC_RND;
1104
1105 else if (strcmp(f, "MACDST_RND") == 0)
1106 pkt_dev->flags |= F_MACDST_RND;
1107
1108 else if (strcmp(f, "!MACDST_RND") == 0)
1109 pkt_dev->flags &= ~F_MACDST_RND;
1110
1111 else if (strcmp(f, "MPLS_RND") == 0)
1112 pkt_dev->flags |= F_MPLS_RND;
1113
1114 else if (strcmp(f, "!MPLS_RND") == 0)
1115 pkt_dev->flags &= ~F_MPLS_RND;
1116
1117 else if (strcmp(f, "VID_RND") == 0)
1118 pkt_dev->flags |= F_VID_RND;
1119
1120 else if (strcmp(f, "!VID_RND") == 0)
1121 pkt_dev->flags &= ~F_VID_RND;
1122
1123 else if (strcmp(f, "SVID_RND") == 0)
1124 pkt_dev->flags |= F_SVID_RND;
1125
1126 else if (strcmp(f, "!SVID_RND") == 0)
1127 pkt_dev->flags &= ~F_SVID_RND;
1128
1129 else if (strcmp(f, "FLOW_SEQ") == 0)
1130 pkt_dev->flags |= F_FLOW_SEQ;
1131
1132 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1133 pkt_dev->flags |= F_QUEUE_MAP_RND;
1134
1135 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1136 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1137 #ifdef CONFIG_XFRM
1138 else if (strcmp(f, "IPSEC") == 0)
1139 pkt_dev->flags |= F_IPSEC_ON;
1140 #endif
1141
1142 else if (strcmp(f, "!IPV6") == 0)
1143 pkt_dev->flags &= ~F_IPV6;
1144
1145 else {
1146 sprintf(pg_result,
1147 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1148 f,
1149 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1150 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC\n");
1151 return count;
1152 }
1153 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1154 return count;
1155 }
1156 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1157 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1158 if (len < 0) {
1159 return len;
1160 }
1161
1162 if (copy_from_user(buf, &user_buffer[i], len))
1163 return -EFAULT;
1164 buf[len] = 0;
1165 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1166 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1167 strncpy(pkt_dev->dst_min, buf, len);
1168 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1169 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1170 }
1171 if (debug)
1172 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1173 pkt_dev->dst_min);
1174 i += len;
1175 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1176 return count;
1177 }
1178 if (!strcmp(name, "dst_max")) {
1179 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1180 if (len < 0) {
1181 return len;
1182 }
1183
1184 if (copy_from_user(buf, &user_buffer[i], len))
1185 return -EFAULT;
1186
1187 buf[len] = 0;
1188 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1189 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1190 strncpy(pkt_dev->dst_max, buf, len);
1191 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1192 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1193 }
1194 if (debug)
1195 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1196 pkt_dev->dst_max);
1197 i += len;
1198 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1199 return count;
1200 }
1201 if (!strcmp(name, "dst6")) {
1202 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1203 if (len < 0)
1204 return len;
1205
1206 pkt_dev->flags |= F_IPV6;
1207
1208 if (copy_from_user(buf, &user_buffer[i], len))
1209 return -EFAULT;
1210 buf[len] = 0;
1211
1212 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1213 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1214
1215 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1216
1217 if (debug)
1218 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1219
1220 i += len;
1221 sprintf(pg_result, "OK: dst6=%s", buf);
1222 return count;
1223 }
1224 if (!strcmp(name, "dst6_min")) {
1225 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1226 if (len < 0)
1227 return len;
1228
1229 pkt_dev->flags |= F_IPV6;
1230
1231 if (copy_from_user(buf, &user_buffer[i], len))
1232 return -EFAULT;
1233 buf[len] = 0;
1234
1235 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1236 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1237
1238 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1239 &pkt_dev->min_in6_daddr);
1240 if (debug)
1241 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1242
1243 i += len;
1244 sprintf(pg_result, "OK: dst6_min=%s", buf);
1245 return count;
1246 }
1247 if (!strcmp(name, "dst6_max")) {
1248 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1249 if (len < 0)
1250 return len;
1251
1252 pkt_dev->flags |= F_IPV6;
1253
1254 if (copy_from_user(buf, &user_buffer[i], len))
1255 return -EFAULT;
1256 buf[len] = 0;
1257
1258 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1259 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1260
1261 if (debug)
1262 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1263
1264 i += len;
1265 sprintf(pg_result, "OK: dst6_max=%s", buf);
1266 return count;
1267 }
1268 if (!strcmp(name, "src6")) {
1269 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1270 if (len < 0)
1271 return len;
1272
1273 pkt_dev->flags |= F_IPV6;
1274
1275 if (copy_from_user(buf, &user_buffer[i], len))
1276 return -EFAULT;
1277 buf[len] = 0;
1278
1279 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1280 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1281
1282 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1283
1284 if (debug)
1285 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1286
1287 i += len;
1288 sprintf(pg_result, "OK: src6=%s", buf);
1289 return count;
1290 }
1291 if (!strcmp(name, "src_min")) {
1292 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1293 if (len < 0) {
1294 return len;
1295 }
1296 if (copy_from_user(buf, &user_buffer[i], len))
1297 return -EFAULT;
1298 buf[len] = 0;
1299 if (strcmp(buf, pkt_dev->src_min) != 0) {
1300 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1301 strncpy(pkt_dev->src_min, buf, len);
1302 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1303 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1304 }
1305 if (debug)
1306 printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1307 pkt_dev->src_min);
1308 i += len;
1309 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1310 return count;
1311 }
1312 if (!strcmp(name, "src_max")) {
1313 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1314 if (len < 0) {
1315 return len;
1316 }
1317 if (copy_from_user(buf, &user_buffer[i], len))
1318 return -EFAULT;
1319 buf[len] = 0;
1320 if (strcmp(buf, pkt_dev->src_max) != 0) {
1321 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1322 strncpy(pkt_dev->src_max, buf, len);
1323 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1324 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1325 }
1326 if (debug)
1327 printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1328 pkt_dev->src_max);
1329 i += len;
1330 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1331 return count;
1332 }
1333 if (!strcmp(name, "dst_mac")) {
1334 char *v = valstr;
1335 unsigned char old_dmac[ETH_ALEN];
1336 unsigned char *m = pkt_dev->dst_mac;
1337 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1338
1339 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1340 if (len < 0) {
1341 return len;
1342 }
1343 memset(valstr, 0, sizeof(valstr));
1344 if (copy_from_user(valstr, &user_buffer[i], len))
1345 return -EFAULT;
1346 i += len;
1347
1348 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1349 if (*v >= '0' && *v <= '9') {
1350 *m *= 16;
1351 *m += *v - '0';
1352 }
1353 if (*v >= 'A' && *v <= 'F') {
1354 *m *= 16;
1355 *m += *v - 'A' + 10;
1356 }
1357 if (*v >= 'a' && *v <= 'f') {
1358 *m *= 16;
1359 *m += *v - 'a' + 10;
1360 }
1361 if (*v == ':') {
1362 m++;
1363 *m = 0;
1364 }
1365 }
1366
1367 /* Set up Dest MAC */
1368 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1369 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1370
1371 sprintf(pg_result, "OK: dstmac");
1372 return count;
1373 }
1374 if (!strcmp(name, "src_mac")) {
1375 char *v = valstr;
1376 unsigned char old_smac[ETH_ALEN];
1377 unsigned char *m = pkt_dev->src_mac;
1378
1379 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN);
1380
1381 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1382 if (len < 0) {
1383 return len;
1384 }
1385 memset(valstr, 0, sizeof(valstr));
1386 if (copy_from_user(valstr, &user_buffer[i], len))
1387 return -EFAULT;
1388 i += len;
1389
1390 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1391 if (*v >= '0' && *v <= '9') {
1392 *m *= 16;
1393 *m += *v - '0';
1394 }
1395 if (*v >= 'A' && *v <= 'F') {
1396 *m *= 16;
1397 *m += *v - 'A' + 10;
1398 }
1399 if (*v >= 'a' && *v <= 'f') {
1400 *m *= 16;
1401 *m += *v - 'a' + 10;
1402 }
1403 if (*v == ':') {
1404 m++;
1405 *m = 0;
1406 }
1407 }
1408
1409 /* Set up Src MAC */
1410 if (compare_ether_addr(old_smac, pkt_dev->src_mac))
1411 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN);
1412
1413 sprintf(pg_result, "OK: srcmac");
1414 return count;
1415 }
1416
1417 if (!strcmp(name, "clear_counters")) {
1418 pktgen_clear_counters(pkt_dev);
1419 sprintf(pg_result, "OK: Clearing counters.\n");
1420 return count;
1421 }
1422
1423 if (!strcmp(name, "flows")) {
1424 len = num_arg(&user_buffer[i], 10, &value);
1425 if (len < 0) {
1426 return len;
1427 }
1428 i += len;
1429 if (value > MAX_CFLOWS)
1430 value = MAX_CFLOWS;
1431
1432 pkt_dev->cflows = value;
1433 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1434 return count;
1435 }
1436
1437 if (!strcmp(name, "flowlen")) {
1438 len = num_arg(&user_buffer[i], 10, &value);
1439 if (len < 0) {
1440 return len;
1441 }
1442 i += len;
1443 pkt_dev->lflow = value;
1444 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1445 return count;
1446 }
1447
1448 if (!strcmp(name, "queue_map_min")) {
1449 len = num_arg(&user_buffer[i], 5, &value);
1450 if (len < 0) {
1451 return len;
1452 }
1453 i += len;
1454 pkt_dev->queue_map_min = value;
1455 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1456 return count;
1457 }
1458
1459 if (!strcmp(name, "queue_map_max")) {
1460 len = num_arg(&user_buffer[i], 5, &value);
1461 if (len < 0) {
1462 return len;
1463 }
1464 i += len;
1465 pkt_dev->queue_map_max = value;
1466 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1467 return count;
1468 }
1469
1470 if (!strcmp(name, "mpls")) {
1471 unsigned n, cnt;
1472
1473 len = get_labels(&user_buffer[i], pkt_dev);
1474 if (len < 0)
1475 return len;
1476 i += len;
1477 cnt = sprintf(pg_result, "OK: mpls=");
1478 for (n = 0; n < pkt_dev->nr_labels; n++)
1479 cnt += sprintf(pg_result + cnt,
1480 "%08x%s", ntohl(pkt_dev->labels[n]),
1481 n == pkt_dev->nr_labels-1 ? "" : ",");
1482
1483 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1484 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1485 pkt_dev->svlan_id = 0xffff;
1486
1487 if (debug)
1488 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1489 }
1490 return count;
1491 }
1492
1493 if (!strcmp(name, "vlan_id")) {
1494 len = num_arg(&user_buffer[i], 4, &value);
1495 if (len < 0) {
1496 return len;
1497 }
1498 i += len;
1499 if (value <= 4095) {
1500 pkt_dev->vlan_id = value; /* turn on VLAN */
1501
1502 if (debug)
1503 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1504
1505 if (debug && pkt_dev->nr_labels)
1506 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1507
1508 pkt_dev->nr_labels = 0; /* turn off MPLS */
1509 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1510 } else {
1511 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1512 pkt_dev->svlan_id = 0xffff;
1513
1514 if (debug)
1515 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1516 }
1517 return count;
1518 }
1519
1520 if (!strcmp(name, "vlan_p")) {
1521 len = num_arg(&user_buffer[i], 1, &value);
1522 if (len < 0) {
1523 return len;
1524 }
1525 i += len;
1526 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1527 pkt_dev->vlan_p = value;
1528 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1529 } else {
1530 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1531 }
1532 return count;
1533 }
1534
1535 if (!strcmp(name, "vlan_cfi")) {
1536 len = num_arg(&user_buffer[i], 1, &value);
1537 if (len < 0) {
1538 return len;
1539 }
1540 i += len;
1541 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1542 pkt_dev->vlan_cfi = value;
1543 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1544 } else {
1545 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1546 }
1547 return count;
1548 }
1549
1550 if (!strcmp(name, "svlan_id")) {
1551 len = num_arg(&user_buffer[i], 4, &value);
1552 if (len < 0) {
1553 return len;
1554 }
1555 i += len;
1556 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1557 pkt_dev->svlan_id = value; /* turn on SVLAN */
1558
1559 if (debug)
1560 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1561
1562 if (debug && pkt_dev->nr_labels)
1563 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1564
1565 pkt_dev->nr_labels = 0; /* turn off MPLS */
1566 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1567 } else {
1568 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1569 pkt_dev->svlan_id = 0xffff;
1570
1571 if (debug)
1572 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1573 }
1574 return count;
1575 }
1576
1577 if (!strcmp(name, "svlan_p")) {
1578 len = num_arg(&user_buffer[i], 1, &value);
1579 if (len < 0) {
1580 return len;
1581 }
1582 i += len;
1583 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1584 pkt_dev->svlan_p = value;
1585 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1586 } else {
1587 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1588 }
1589 return count;
1590 }
1591
1592 if (!strcmp(name, "svlan_cfi")) {
1593 len = num_arg(&user_buffer[i], 1, &value);
1594 if (len < 0) {
1595 return len;
1596 }
1597 i += len;
1598 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1599 pkt_dev->svlan_cfi = value;
1600 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1601 } else {
1602 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1603 }
1604 return count;
1605 }
1606
1607 if (!strcmp(name, "tos")) {
1608 __u32 tmp_value = 0;
1609 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1610 if (len < 0) {
1611 return len;
1612 }
1613 i += len;
1614 if (len == 2) {
1615 pkt_dev->tos = tmp_value;
1616 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1617 } else {
1618 sprintf(pg_result, "ERROR: tos must be 00-ff");
1619 }
1620 return count;
1621 }
1622
1623 if (!strcmp(name, "traffic_class")) {
1624 __u32 tmp_value = 0;
1625 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1626 if (len < 0) {
1627 return len;
1628 }
1629 i += len;
1630 if (len == 2) {
1631 pkt_dev->traffic_class = tmp_value;
1632 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1633 } else {
1634 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1635 }
1636 return count;
1637 }
1638
1639 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1640 return -EINVAL;
1641 }
1642
1643 static int pktgen_if_open(struct inode *inode, struct file *file)
1644 {
1645 return single_open(file, pktgen_if_show, PDE(inode)->data);
1646 }
1647
1648 static const struct file_operations pktgen_if_fops = {
1649 .owner = THIS_MODULE,
1650 .open = pktgen_if_open,
1651 .read = seq_read,
1652 .llseek = seq_lseek,
1653 .write = pktgen_if_write,
1654 .release = single_release,
1655 };
1656
1657 static int pktgen_thread_show(struct seq_file *seq, void *v)
1658 {
1659 struct pktgen_thread *t = seq->private;
1660 struct pktgen_dev *pkt_dev;
1661
1662 BUG_ON(!t);
1663
1664 seq_printf(seq, "Running: ");
1665
1666 if_lock(t);
1667 list_for_each_entry(pkt_dev, &t->if_list, list)
1668 if (pkt_dev->running)
1669 seq_printf(seq, "%s ", pkt_dev->odev->name);
1670
1671 seq_printf(seq, "\nStopped: ");
1672
1673 list_for_each_entry(pkt_dev, &t->if_list, list)
1674 if (!pkt_dev->running)
1675 seq_printf(seq, "%s ", pkt_dev->odev->name);
1676
1677 if (t->result[0])
1678 seq_printf(seq, "\nResult: %s\n", t->result);
1679 else
1680 seq_printf(seq, "\nResult: NA\n");
1681
1682 if_unlock(t);
1683
1684 return 0;
1685 }
1686
1687 static ssize_t pktgen_thread_write(struct file *file,
1688 const char __user * user_buffer,
1689 size_t count, loff_t * offset)
1690 {
1691 struct seq_file *seq = (struct seq_file *)file->private_data;
1692 struct pktgen_thread *t = seq->private;
1693 int i = 0, max, len, ret;
1694 char name[40];
1695 char *pg_result;
1696
1697 if (count < 1) {
1698 // sprintf(pg_result, "Wrong command format");
1699 return -EINVAL;
1700 }
1701
1702 max = count - i;
1703 len = count_trail_chars(&user_buffer[i], max);
1704 if (len < 0)
1705 return len;
1706
1707 i += len;
1708
1709 /* Read variable name */
1710
1711 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1712 if (len < 0)
1713 return len;
1714
1715 memset(name, 0, sizeof(name));
1716 if (copy_from_user(name, &user_buffer[i], len))
1717 return -EFAULT;
1718 i += len;
1719
1720 max = count - i;
1721 len = count_trail_chars(&user_buffer[i], max);
1722 if (len < 0)
1723 return len;
1724
1725 i += len;
1726
1727 if (debug)
1728 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1729 name, (unsigned long)count);
1730
1731 if (!t) {
1732 printk(KERN_ERR "pktgen: ERROR: No thread\n");
1733 ret = -EINVAL;
1734 goto out;
1735 }
1736
1737 pg_result = &(t->result[0]);
1738
1739 if (!strcmp(name, "add_device")) {
1740 char f[32];
1741 memset(f, 0, 32);
1742 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1743 if (len < 0) {
1744 ret = len;
1745 goto out;
1746 }
1747 if (copy_from_user(f, &user_buffer[i], len))
1748 return -EFAULT;
1749 i += len;
1750 mutex_lock(&pktgen_thread_lock);
1751 pktgen_add_device(t, f);
1752 mutex_unlock(&pktgen_thread_lock);
1753 ret = count;
1754 sprintf(pg_result, "OK: add_device=%s", f);
1755 goto out;
1756 }
1757
1758 if (!strcmp(name, "rem_device_all")) {
1759 mutex_lock(&pktgen_thread_lock);
1760 t->control |= T_REMDEVALL;
1761 mutex_unlock(&pktgen_thread_lock);
1762 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1763 ret = count;
1764 sprintf(pg_result, "OK: rem_device_all");
1765 goto out;
1766 }
1767
1768 if (!strcmp(name, "max_before_softirq")) {
1769 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1770 ret = count;
1771 goto out;
1772 }
1773
1774 ret = -EINVAL;
1775 out:
1776 return ret;
1777 }
1778
1779 static int pktgen_thread_open(struct inode *inode, struct file *file)
1780 {
1781 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1782 }
1783
1784 static const struct file_operations pktgen_thread_fops = {
1785 .owner = THIS_MODULE,
1786 .open = pktgen_thread_open,
1787 .read = seq_read,
1788 .llseek = seq_lseek,
1789 .write = pktgen_thread_write,
1790 .release = single_release,
1791 };
1792
1793 /* Think find or remove for NN */
1794 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1795 {
1796 struct pktgen_thread *t;
1797 struct pktgen_dev *pkt_dev = NULL;
1798
1799 list_for_each_entry(t, &pktgen_threads, th_list) {
1800 pkt_dev = pktgen_find_dev(t, ifname);
1801 if (pkt_dev) {
1802 if (remove) {
1803 if_lock(t);
1804 pkt_dev->removal_mark = 1;
1805 t->control |= T_REMDEV;
1806 if_unlock(t);
1807 }
1808 break;
1809 }
1810 }
1811 return pkt_dev;
1812 }
1813
1814 /*
1815 * mark a device for removal
1816 */
1817 static void pktgen_mark_device(const char *ifname)
1818 {
1819 struct pktgen_dev *pkt_dev = NULL;
1820 const int max_tries = 10, msec_per_try = 125;
1821 int i = 0;
1822
1823 mutex_lock(&pktgen_thread_lock);
1824 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname);
1825
1826 while (1) {
1827
1828 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1829 if (pkt_dev == NULL)
1830 break; /* success */
1831
1832 mutex_unlock(&pktgen_thread_lock);
1833 pr_debug("pktgen: pktgen_mark_device waiting for %s "
1834 "to disappear....\n", ifname);
1835 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1836 mutex_lock(&pktgen_thread_lock);
1837
1838 if (++i >= max_tries) {
1839 printk(KERN_ERR "pktgen_mark_device: timed out after "
1840 "waiting %d msec for device %s to be removed\n",
1841 msec_per_try * i, ifname);
1842 break;
1843 }
1844
1845 }
1846
1847 mutex_unlock(&pktgen_thread_lock);
1848 }
1849
1850 static void pktgen_change_name(struct net_device *dev)
1851 {
1852 struct pktgen_thread *t;
1853
1854 list_for_each_entry(t, &pktgen_threads, th_list) {
1855 struct pktgen_dev *pkt_dev;
1856
1857 list_for_each_entry(pkt_dev, &t->if_list, list) {
1858 if (pkt_dev->odev != dev)
1859 continue;
1860
1861 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1862
1863 pkt_dev->entry = create_proc_entry(dev->name, 0600,
1864 pg_proc_dir);
1865 if (!pkt_dev->entry)
1866 printk(KERN_ERR "pktgen: can't move proc "
1867 " entry for '%s'\n", dev->name);
1868 break;
1869 }
1870 }
1871 }
1872
1873 static int pktgen_device_event(struct notifier_block *unused,
1874 unsigned long event, void *ptr)
1875 {
1876 struct net_device *dev = ptr;
1877
1878 if (dev_net(dev) != &init_net)
1879 return NOTIFY_DONE;
1880
1881 /* It is OK that we do not hold the group lock right now,
1882 * as we run under the RTNL lock.
1883 */
1884
1885 switch (event) {
1886 case NETDEV_CHANGENAME:
1887 pktgen_change_name(dev);
1888 break;
1889
1890 case NETDEV_UNREGISTER:
1891 pktgen_mark_device(dev->name);
1892 break;
1893 }
1894
1895 return NOTIFY_DONE;
1896 }
1897
1898 /* Associate pktgen_dev with a device. */
1899
1900 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1901 {
1902 struct net_device *odev;
1903 int err;
1904
1905 /* Clean old setups */
1906 if (pkt_dev->odev) {
1907 dev_put(pkt_dev->odev);
1908 pkt_dev->odev = NULL;
1909 }
1910
1911 odev = dev_get_by_name(&init_net, ifname);
1912 if (!odev) {
1913 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname);
1914 return -ENODEV;
1915 }
1916
1917 if (odev->type != ARPHRD_ETHER) {
1918 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname);
1919 err = -EINVAL;
1920 } else if (!netif_running(odev)) {
1921 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname);
1922 err = -ENETDOWN;
1923 } else {
1924 pkt_dev->odev = odev;
1925 return 0;
1926 }
1927
1928 dev_put(odev);
1929 return err;
1930 }
1931
1932 /* Read pkt_dev from the interface and set up internal pktgen_dev
1933 * structure to have the right information to create/send packets
1934 */
1935 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
1936 {
1937 if (!pkt_dev->odev) {
1938 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in "
1939 "setup_inject.\n");
1940 sprintf(pkt_dev->result,
1941 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
1942 return;
1943 }
1944
1945 /* Default to the interface's mac if not explicitly set. */
1946
1947 if (is_zero_ether_addr(pkt_dev->src_mac))
1948 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
1949
1950 /* Set up Dest MAC */
1951 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1952
1953 /* Set up pkt size */
1954 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
1955
1956 if (pkt_dev->flags & F_IPV6) {
1957 /*
1958 * Skip this automatic address setting until locks or functions
1959 * gets exported
1960 */
1961
1962 #ifdef NOTNOW
1963 int i, set = 0, err = 1;
1964 struct inet6_dev *idev;
1965
1966 for (i = 0; i < IN6_ADDR_HSIZE; i++)
1967 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
1968 set = 1;
1969 break;
1970 }
1971
1972 if (!set) {
1973
1974 /*
1975 * Use linklevel address if unconfigured.
1976 *
1977 * use ipv6_get_lladdr if/when it's get exported
1978 */
1979
1980 rcu_read_lock();
1981 if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) {
1982 struct inet6_ifaddr *ifp;
1983
1984 read_lock_bh(&idev->lock);
1985 for (ifp = idev->addr_list; ifp;
1986 ifp = ifp->if_next) {
1987 if (ifp->scope == IFA_LINK
1988 && !(ifp->
1989 flags & IFA_F_TENTATIVE)) {
1990 ipv6_addr_copy(&pkt_dev->
1991 cur_in6_saddr,
1992 &ifp->addr);
1993 err = 0;
1994 break;
1995 }
1996 }
1997 read_unlock_bh(&idev->lock);
1998 }
1999 rcu_read_unlock();
2000 if (err)
2001 printk(KERN_ERR "pktgen: ERROR: IPv6 link "
2002 "address not availble.\n");
2003 }
2004 #endif
2005 } else {
2006 pkt_dev->saddr_min = 0;
2007 pkt_dev->saddr_max = 0;
2008 if (strlen(pkt_dev->src_min) == 0) {
2009
2010 struct in_device *in_dev;
2011
2012 rcu_read_lock();
2013 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2014 if (in_dev) {
2015 if (in_dev->ifa_list) {
2016 pkt_dev->saddr_min =
2017 in_dev->ifa_list->ifa_address;
2018 pkt_dev->saddr_max = pkt_dev->saddr_min;
2019 }
2020 }
2021 rcu_read_unlock();
2022 } else {
2023 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2024 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2025 }
2026
2027 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2028 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2029 }
2030 /* Initialize current values. */
2031 pkt_dev->cur_dst_mac_offset = 0;
2032 pkt_dev->cur_src_mac_offset = 0;
2033 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2034 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2035 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2036 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2037 pkt_dev->nflows = 0;
2038 }
2039
2040 static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us)
2041 {
2042 __u64 start;
2043 __u64 now;
2044
2045 start = now = getCurUs();
2046 while (now < spin_until_us) {
2047 /* TODO: optimize sleeping behavior */
2048 if (spin_until_us - now > jiffies_to_usecs(1) + 1)
2049 schedule_timeout_interruptible(1);
2050 else if (spin_until_us - now > 100) {
2051 if (!pkt_dev->running)
2052 return;
2053 if (need_resched())
2054 schedule();
2055 }
2056
2057 now = getCurUs();
2058 }
2059
2060 pkt_dev->idle_acc += now - start;
2061 }
2062
2063 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2064 {
2065 pkt_dev->pkt_overhead = 0;
2066 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2067 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2068 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2069 }
2070
2071 static inline int f_seen(struct pktgen_dev *pkt_dev, int flow)
2072 {
2073
2074 if (pkt_dev->flows[flow].flags & F_INIT)
2075 return 1;
2076 else
2077 return 0;
2078 }
2079
2080 static inline int f_pick(struct pktgen_dev *pkt_dev)
2081 {
2082 int flow = pkt_dev->curfl;
2083
2084 if (pkt_dev->flags & F_FLOW_SEQ) {
2085 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2086 /* reset time */
2087 pkt_dev->flows[flow].count = 0;
2088 pkt_dev->curfl += 1;
2089 if (pkt_dev->curfl >= pkt_dev->cflows)
2090 pkt_dev->curfl = 0; /*reset */
2091 }
2092 } else {
2093 flow = random32() % pkt_dev->cflows;
2094
2095 if (pkt_dev->flows[flow].count > pkt_dev->lflow)
2096 pkt_dev->flows[flow].count = 0;
2097 }
2098
2099 return pkt_dev->curfl;
2100 }
2101
2102
2103 #ifdef CONFIG_XFRM
2104 /* If there was already an IPSEC SA, we keep it as is, else
2105 * we go look for it ...
2106 */
2107 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2108 {
2109 struct xfrm_state *x = pkt_dev->flows[flow].x;
2110 if (!x) {
2111 /*slow path: we dont already have xfrm_state*/
2112 x = xfrm_stateonly_find((xfrm_address_t *)&pkt_dev->cur_daddr,
2113 (xfrm_address_t *)&pkt_dev->cur_saddr,
2114 AF_INET,
2115 pkt_dev->ipsmode,
2116 pkt_dev->ipsproto, 0);
2117 if (x) {
2118 pkt_dev->flows[flow].x = x;
2119 set_pkt_overhead(pkt_dev);
2120 pkt_dev->pkt_overhead+=x->props.header_len;
2121 }
2122
2123 }
2124 }
2125 #endif
2126 /* Increment/randomize headers according to flags and current values
2127 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2128 */
2129 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2130 {
2131 __u32 imn;
2132 __u32 imx;
2133 int flow = 0;
2134
2135 if (pkt_dev->cflows)
2136 flow = f_pick(pkt_dev);
2137
2138 /* Deal with source MAC */
2139 if (pkt_dev->src_mac_count > 1) {
2140 __u32 mc;
2141 __u32 tmp;
2142
2143 if (pkt_dev->flags & F_MACSRC_RND)
2144 mc = random32() % pkt_dev->src_mac_count;
2145 else {
2146 mc = pkt_dev->cur_src_mac_offset++;
2147 if (pkt_dev->cur_src_mac_offset >
2148 pkt_dev->src_mac_count)
2149 pkt_dev->cur_src_mac_offset = 0;
2150 }
2151
2152 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2153 pkt_dev->hh[11] = tmp;
2154 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2155 pkt_dev->hh[10] = tmp;
2156 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2157 pkt_dev->hh[9] = tmp;
2158 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2159 pkt_dev->hh[8] = tmp;
2160 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2161 pkt_dev->hh[7] = tmp;
2162 }
2163
2164 /* Deal with Destination MAC */
2165 if (pkt_dev->dst_mac_count > 1) {
2166 __u32 mc;
2167 __u32 tmp;
2168
2169 if (pkt_dev->flags & F_MACDST_RND)
2170 mc = random32() % pkt_dev->dst_mac_count;
2171
2172 else {
2173 mc = pkt_dev->cur_dst_mac_offset++;
2174 if (pkt_dev->cur_dst_mac_offset >
2175 pkt_dev->dst_mac_count) {
2176 pkt_dev->cur_dst_mac_offset = 0;
2177 }
2178 }
2179
2180 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2181 pkt_dev->hh[5] = tmp;
2182 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2183 pkt_dev->hh[4] = tmp;
2184 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2185 pkt_dev->hh[3] = tmp;
2186 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2187 pkt_dev->hh[2] = tmp;
2188 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2189 pkt_dev->hh[1] = tmp;
2190 }
2191
2192 if (pkt_dev->flags & F_MPLS_RND) {
2193 unsigned i;
2194 for (i = 0; i < pkt_dev->nr_labels; i++)
2195 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2196 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2197 ((__force __be32)random32() &
2198 htonl(0x000fffff));
2199 }
2200
2201 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2202 pkt_dev->vlan_id = random32() & (4096-1);
2203 }
2204
2205 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2206 pkt_dev->svlan_id = random32() & (4096 - 1);
2207 }
2208
2209 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2210 if (pkt_dev->flags & F_UDPSRC_RND)
2211 pkt_dev->cur_udp_src = random32() %
2212 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2213 + pkt_dev->udp_src_min;
2214
2215 else {
2216 pkt_dev->cur_udp_src++;
2217 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2218 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2219 }
2220 }
2221
2222 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2223 if (pkt_dev->flags & F_UDPDST_RND) {
2224 pkt_dev->cur_udp_dst = random32() %
2225 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2226 + pkt_dev->udp_dst_min;
2227 } else {
2228 pkt_dev->cur_udp_dst++;
2229 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2230 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2231 }
2232 }
2233
2234 if (!(pkt_dev->flags & F_IPV6)) {
2235
2236 if ((imn = ntohl(pkt_dev->saddr_min)) < (imx =
2237 ntohl(pkt_dev->
2238 saddr_max))) {
2239 __u32 t;
2240 if (pkt_dev->flags & F_IPSRC_RND)
2241 t = random32() % (imx - imn) + imn;
2242 else {
2243 t = ntohl(pkt_dev->cur_saddr);
2244 t++;
2245 if (t > imx) {
2246 t = imn;
2247 }
2248 }
2249 pkt_dev->cur_saddr = htonl(t);
2250 }
2251
2252 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2253 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2254 } else {
2255 imn = ntohl(pkt_dev->daddr_min);
2256 imx = ntohl(pkt_dev->daddr_max);
2257 if (imn < imx) {
2258 __u32 t;
2259 __be32 s;
2260 if (pkt_dev->flags & F_IPDST_RND) {
2261
2262 t = random32() % (imx - imn) + imn;
2263 s = htonl(t);
2264
2265 while (ipv4_is_loopback(s) ||
2266 ipv4_is_multicast(s) ||
2267 ipv4_is_lbcast(s) ||
2268 ipv4_is_zeronet(s) ||
2269 ipv4_is_local_multicast(s)) {
2270 t = random32() % (imx - imn) + imn;
2271 s = htonl(t);
2272 }
2273 pkt_dev->cur_daddr = s;
2274 } else {
2275 t = ntohl(pkt_dev->cur_daddr);
2276 t++;
2277 if (t > imx) {
2278 t = imn;
2279 }
2280 pkt_dev->cur_daddr = htonl(t);
2281 }
2282 }
2283 if (pkt_dev->cflows) {
2284 pkt_dev->flows[flow].flags |= F_INIT;
2285 pkt_dev->flows[flow].cur_daddr =
2286 pkt_dev->cur_daddr;
2287 #ifdef CONFIG_XFRM
2288 if (pkt_dev->flags & F_IPSEC_ON)
2289 get_ipsec_sa(pkt_dev, flow);
2290 #endif
2291 pkt_dev->nflows++;
2292 }
2293 }
2294 } else { /* IPV6 * */
2295
2296 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2297 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2298 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2299 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2300 else {
2301 int i;
2302
2303 /* Only random destinations yet */
2304
2305 for (i = 0; i < 4; i++) {
2306 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2307 (((__force __be32)random32() |
2308 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2309 pkt_dev->max_in6_daddr.s6_addr32[i]);
2310 }
2311 }
2312 }
2313
2314 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2315 __u32 t;
2316 if (pkt_dev->flags & F_TXSIZE_RND) {
2317 t = random32() %
2318 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2319 + pkt_dev->min_pkt_size;
2320 } else {
2321 t = pkt_dev->cur_pkt_size + 1;
2322 if (t > pkt_dev->max_pkt_size)
2323 t = pkt_dev->min_pkt_size;
2324 }
2325 pkt_dev->cur_pkt_size = t;
2326 }
2327
2328 if (pkt_dev->queue_map_min < pkt_dev->queue_map_max) {
2329 __u16 t;
2330 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2331 t = random32() %
2332 (pkt_dev->queue_map_max - pkt_dev->queue_map_min + 1)
2333 + pkt_dev->queue_map_min;
2334 } else {
2335 t = pkt_dev->cur_queue_map + 1;
2336 if (t > pkt_dev->queue_map_max)
2337 t = pkt_dev->queue_map_min;
2338 }
2339 pkt_dev->cur_queue_map = t;
2340 }
2341
2342 pkt_dev->flows[flow].count++;
2343 }
2344
2345
2346 #ifdef CONFIG_XFRM
2347 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2348 {
2349 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2350 int err = 0;
2351 struct iphdr *iph;
2352
2353 if (!x)
2354 return 0;
2355 /* XXX: we dont support tunnel mode for now until
2356 * we resolve the dst issue */
2357 if (x->props.mode != XFRM_MODE_TRANSPORT)
2358 return 0;
2359
2360 spin_lock(&x->lock);
2361 iph = ip_hdr(skb);
2362
2363 err = x->outer_mode->output(x, skb);
2364 if (err)
2365 goto error;
2366 err = x->type->output(x, skb);
2367 if (err)
2368 goto error;
2369
2370 x->curlft.bytes +=skb->len;
2371 x->curlft.packets++;
2372 error:
2373 spin_unlock(&x->lock);
2374 return err;
2375 }
2376
2377 static inline void free_SAs(struct pktgen_dev *pkt_dev)
2378 {
2379 if (pkt_dev->cflows) {
2380 /* let go of the SAs if we have them */
2381 int i = 0;
2382 for (; i < pkt_dev->nflows; i++){
2383 struct xfrm_state *x = pkt_dev->flows[i].x;
2384 if (x) {
2385 xfrm_state_put(x);
2386 pkt_dev->flows[i].x = NULL;
2387 }
2388 }
2389 }
2390 }
2391
2392 static inline int process_ipsec(struct pktgen_dev *pkt_dev,
2393 struct sk_buff *skb, __be16 protocol)
2394 {
2395 if (pkt_dev->flags & F_IPSEC_ON) {
2396 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2397 int nhead = 0;
2398 if (x) {
2399 int ret;
2400 __u8 *eth;
2401 nhead = x->props.header_len - skb_headroom(skb);
2402 if (nhead >0) {
2403 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2404 if (ret < 0) {
2405 printk(KERN_ERR "Error expanding "
2406 "ipsec packet %d\n",ret);
2407 return 0;
2408 }
2409 }
2410
2411 /* ipsec is not expecting ll header */
2412 skb_pull(skb, ETH_HLEN);
2413 ret = pktgen_output_ipsec(skb, pkt_dev);
2414 if (ret) {
2415 printk(KERN_ERR "Error creating ipsec "
2416 "packet %d\n",ret);
2417 kfree_skb(skb);
2418 return 0;
2419 }
2420 /* restore ll */
2421 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2422 memcpy(eth, pkt_dev->hh, 12);
2423 *(u16 *) & eth[12] = protocol;
2424 }
2425 }
2426 return 1;
2427 }
2428 #endif
2429
2430 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2431 {
2432 unsigned i;
2433 for (i = 0; i < pkt_dev->nr_labels; i++) {
2434 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2435 }
2436 mpls--;
2437 *mpls |= MPLS_STACK_BOTTOM;
2438 }
2439
2440 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2441 unsigned int prio)
2442 {
2443 return htons(id | (cfi << 12) | (prio << 13));
2444 }
2445
2446 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2447 struct pktgen_dev *pkt_dev)
2448 {
2449 struct sk_buff *skb = NULL;
2450 __u8 *eth;
2451 struct udphdr *udph;
2452 int datalen, iplen;
2453 struct iphdr *iph;
2454 struct pktgen_hdr *pgh = NULL;
2455 __be16 protocol = htons(ETH_P_IP);
2456 __be32 *mpls;
2457 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2458 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2459 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2460 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2461
2462
2463 if (pkt_dev->nr_labels)
2464 protocol = htons(ETH_P_MPLS_UC);
2465
2466 if (pkt_dev->vlan_id != 0xffff)
2467 protocol = htons(ETH_P_8021Q);
2468
2469 /* Update any of the values, used when we're incrementing various
2470 * fields.
2471 */
2472 mod_cur_headers(pkt_dev);
2473
2474 datalen = (odev->hard_header_len + 16) & ~0xf;
2475 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + datalen +
2476 pkt_dev->pkt_overhead, GFP_ATOMIC);
2477 if (!skb) {
2478 sprintf(pkt_dev->result, "No memory");
2479 return NULL;
2480 }
2481
2482 skb_reserve(skb, datalen);
2483
2484 /* Reserve for ethernet and IP header */
2485 eth = (__u8 *) skb_push(skb, 14);
2486 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2487 if (pkt_dev->nr_labels)
2488 mpls_push(mpls, pkt_dev);
2489
2490 if (pkt_dev->vlan_id != 0xffff) {
2491 if (pkt_dev->svlan_id != 0xffff) {
2492 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2493 *svlan_tci = build_tci(pkt_dev->svlan_id,
2494 pkt_dev->svlan_cfi,
2495 pkt_dev->svlan_p);
2496 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2497 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2498 }
2499 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2500 *vlan_tci = build_tci(pkt_dev->vlan_id,
2501 pkt_dev->vlan_cfi,
2502 pkt_dev->vlan_p);
2503 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2504 *vlan_encapsulated_proto = htons(ETH_P_IP);
2505 }
2506
2507 skb->network_header = skb->tail;
2508 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2509 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2510 skb_set_queue_mapping(skb, pkt_dev->cur_queue_map);
2511 iph = ip_hdr(skb);
2512 udph = udp_hdr(skb);
2513
2514 memcpy(eth, pkt_dev->hh, 12);
2515 *(__be16 *) & eth[12] = protocol;
2516
2517 /* Eth + IPh + UDPh + mpls */
2518 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2519 pkt_dev->pkt_overhead;
2520 if (datalen < sizeof(struct pktgen_hdr))
2521 datalen = sizeof(struct pktgen_hdr);
2522
2523 udph->source = htons(pkt_dev->cur_udp_src);
2524 udph->dest = htons(pkt_dev->cur_udp_dst);
2525 udph->len = htons(datalen + 8); /* DATA + udphdr */
2526 udph->check = 0; /* No checksum */
2527
2528 iph->ihl = 5;
2529 iph->version = 4;
2530 iph->ttl = 32;
2531 iph->tos = pkt_dev->tos;
2532 iph->protocol = IPPROTO_UDP; /* UDP */
2533 iph->saddr = pkt_dev->cur_saddr;
2534 iph->daddr = pkt_dev->cur_daddr;
2535 iph->frag_off = 0;
2536 iplen = 20 + 8 + datalen;
2537 iph->tot_len = htons(iplen);
2538 iph->check = 0;
2539 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2540 skb->protocol = protocol;
2541 skb->mac_header = (skb->network_header - ETH_HLEN -
2542 pkt_dev->pkt_overhead);
2543 skb->dev = odev;
2544 skb->pkt_type = PACKET_HOST;
2545
2546 if (pkt_dev->nfrags <= 0)
2547 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2548 else {
2549 int frags = pkt_dev->nfrags;
2550 int i;
2551
2552 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2553
2554 if (frags > MAX_SKB_FRAGS)
2555 frags = MAX_SKB_FRAGS;
2556 if (datalen > frags * PAGE_SIZE) {
2557 skb_put(skb, datalen - frags * PAGE_SIZE);
2558 datalen = frags * PAGE_SIZE;
2559 }
2560
2561 i = 0;
2562 while (datalen > 0) {
2563 struct page *page = alloc_pages(GFP_KERNEL, 0);
2564 skb_shinfo(skb)->frags[i].page = page;
2565 skb_shinfo(skb)->frags[i].page_offset = 0;
2566 skb_shinfo(skb)->frags[i].size =
2567 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2568 datalen -= skb_shinfo(skb)->frags[i].size;
2569 skb->len += skb_shinfo(skb)->frags[i].size;
2570 skb->data_len += skb_shinfo(skb)->frags[i].size;
2571 i++;
2572 skb_shinfo(skb)->nr_frags = i;
2573 }
2574
2575 while (i < frags) {
2576 int rem;
2577
2578 if (i == 0)
2579 break;
2580
2581 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2582 if (rem == 0)
2583 break;
2584
2585 skb_shinfo(skb)->frags[i - 1].size -= rem;
2586
2587 skb_shinfo(skb)->frags[i] =
2588 skb_shinfo(skb)->frags[i - 1];
2589 get_page(skb_shinfo(skb)->frags[i].page);
2590 skb_shinfo(skb)->frags[i].page =
2591 skb_shinfo(skb)->frags[i - 1].page;
2592 skb_shinfo(skb)->frags[i].page_offset +=
2593 skb_shinfo(skb)->frags[i - 1].size;
2594 skb_shinfo(skb)->frags[i].size = rem;
2595 i++;
2596 skb_shinfo(skb)->nr_frags = i;
2597 }
2598 }
2599
2600 /* Stamp the time, and sequence number, convert them to network byte order */
2601
2602 if (pgh) {
2603 struct timeval timestamp;
2604
2605 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2606 pgh->seq_num = htonl(pkt_dev->seq_num);
2607
2608 do_gettimeofday(&timestamp);
2609 pgh->tv_sec = htonl(timestamp.tv_sec);
2610 pgh->tv_usec = htonl(timestamp.tv_usec);
2611 }
2612
2613 #ifdef CONFIG_XFRM
2614 if (!process_ipsec(pkt_dev, skb, protocol))
2615 return NULL;
2616 #endif
2617
2618 return skb;
2619 }
2620
2621 /*
2622 * scan_ip6, fmt_ip taken from dietlibc-0.21
2623 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2624 *
2625 * Slightly modified for kernel.
2626 * Should be candidate for net/ipv4/utils.c
2627 * --ro
2628 */
2629
2630 static unsigned int scan_ip6(const char *s, char ip[16])
2631 {
2632 unsigned int i;
2633 unsigned int len = 0;
2634 unsigned long u;
2635 char suffix[16];
2636 unsigned int prefixlen = 0;
2637 unsigned int suffixlen = 0;
2638 __be32 tmp;
2639 char *pos;
2640
2641 for (i = 0; i < 16; i++)
2642 ip[i] = 0;
2643
2644 for (;;) {
2645 if (*s == ':') {
2646 len++;
2647 if (s[1] == ':') { /* Found "::", skip to part 2 */
2648 s += 2;
2649 len++;
2650 break;
2651 }
2652 s++;
2653 }
2654
2655 u = simple_strtoul(s, &pos, 16);
2656 i = pos - s;
2657 if (!i)
2658 return 0;
2659 if (prefixlen == 12 && s[i] == '.') {
2660
2661 /* the last 4 bytes may be written as IPv4 address */
2662
2663 tmp = in_aton(s);
2664 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2665 return i + len;
2666 }
2667 ip[prefixlen++] = (u >> 8);
2668 ip[prefixlen++] = (u & 255);
2669 s += i;
2670 len += i;
2671 if (prefixlen == 16)
2672 return len;
2673 }
2674
2675 /* part 2, after "::" */
2676 for (;;) {
2677 if (*s == ':') {
2678 if (suffixlen == 0)
2679 break;
2680 s++;
2681 len++;
2682 } else if (suffixlen != 0)
2683 break;
2684
2685 u = simple_strtol(s, &pos, 16);
2686 i = pos - s;
2687 if (!i) {
2688 if (*s)
2689 len--;
2690 break;
2691 }
2692 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2693 tmp = in_aton(s);
2694 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2695 sizeof(tmp));
2696 suffixlen += 4;
2697 len += strlen(s);
2698 break;
2699 }
2700 suffix[suffixlen++] = (u >> 8);
2701 suffix[suffixlen++] = (u & 255);
2702 s += i;
2703 len += i;
2704 if (prefixlen + suffixlen == 16)
2705 break;
2706 }
2707 for (i = 0; i < suffixlen; i++)
2708 ip[16 - suffixlen + i] = suffix[i];
2709 return len;
2710 }
2711
2712 static char tohex(char hexdigit)
2713 {
2714 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2715 }
2716
2717 static int fmt_xlong(char *s, unsigned int i)
2718 {
2719 char *bak = s;
2720 *s = tohex((i >> 12) & 0xf);
2721 if (s != bak || *s != '0')
2722 ++s;
2723 *s = tohex((i >> 8) & 0xf);
2724 if (s != bak || *s != '0')
2725 ++s;
2726 *s = tohex((i >> 4) & 0xf);
2727 if (s != bak || *s != '0')
2728 ++s;
2729 *s = tohex(i & 0xf);
2730 return s - bak + 1;
2731 }
2732
2733 static unsigned int fmt_ip6(char *s, const char ip[16])
2734 {
2735 unsigned int len;
2736 unsigned int i;
2737 unsigned int temp;
2738 unsigned int compressing;
2739 int j;
2740
2741 len = 0;
2742 compressing = 0;
2743 for (j = 0; j < 16; j += 2) {
2744
2745 #ifdef V4MAPPEDPREFIX
2746 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2747 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2748 temp = strlen(s);
2749 return len + temp;
2750 }
2751 #endif
2752 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2753 (unsigned long)(unsigned char)ip[j + 1];
2754 if (temp == 0) {
2755 if (!compressing) {
2756 compressing = 1;
2757 if (j == 0) {
2758 *s++ = ':';
2759 ++len;
2760 }
2761 }
2762 } else {
2763 if (compressing) {
2764 compressing = 0;
2765 *s++ = ':';
2766 ++len;
2767 }
2768 i = fmt_xlong(s, temp);
2769 len += i;
2770 s += i;
2771 if (j < 14) {
2772 *s++ = ':';
2773 ++len;
2774 }
2775 }
2776 }
2777 if (compressing) {
2778 *s++ = ':';
2779 ++len;
2780 }
2781 *s = 0;
2782 return len;
2783 }
2784
2785 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2786 struct pktgen_dev *pkt_dev)
2787 {
2788 struct sk_buff *skb = NULL;
2789 __u8 *eth;
2790 struct udphdr *udph;
2791 int datalen;
2792 struct ipv6hdr *iph;
2793 struct pktgen_hdr *pgh = NULL;
2794 __be16 protocol = htons(ETH_P_IPV6);
2795 __be32 *mpls;
2796 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2797 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2798 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2799 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2800
2801 if (pkt_dev->nr_labels)
2802 protocol = htons(ETH_P_MPLS_UC);
2803
2804 if (pkt_dev->vlan_id != 0xffff)
2805 protocol = htons(ETH_P_8021Q);
2806
2807 /* Update any of the values, used when we're incrementing various
2808 * fields.
2809 */
2810 mod_cur_headers(pkt_dev);
2811
2812 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16 +
2813 pkt_dev->pkt_overhead, GFP_ATOMIC);
2814 if (!skb) {
2815 sprintf(pkt_dev->result, "No memory");
2816 return NULL;
2817 }
2818
2819 skb_reserve(skb, 16);
2820
2821 /* Reserve for ethernet and IP header */
2822 eth = (__u8 *) skb_push(skb, 14);
2823 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2824 if (pkt_dev->nr_labels)
2825 mpls_push(mpls, pkt_dev);
2826
2827 if (pkt_dev->vlan_id != 0xffff) {
2828 if (pkt_dev->svlan_id != 0xffff) {
2829 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2830 *svlan_tci = build_tci(pkt_dev->svlan_id,
2831 pkt_dev->svlan_cfi,
2832 pkt_dev->svlan_p);
2833 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2834 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2835 }
2836 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2837 *vlan_tci = build_tci(pkt_dev->vlan_id,
2838 pkt_dev->vlan_cfi,
2839 pkt_dev->vlan_p);
2840 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2841 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2842 }
2843
2844 skb->network_header = skb->tail;
2845 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
2846 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
2847 skb_set_queue_mapping(skb, pkt_dev->cur_queue_map);
2848 iph = ipv6_hdr(skb);
2849 udph = udp_hdr(skb);
2850
2851 memcpy(eth, pkt_dev->hh, 12);
2852 *(__be16 *) & eth[12] = protocol;
2853
2854 /* Eth + IPh + UDPh + mpls */
2855 datalen = pkt_dev->cur_pkt_size - 14 -
2856 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2857 pkt_dev->pkt_overhead;
2858
2859 if (datalen < sizeof(struct pktgen_hdr)) {
2860 datalen = sizeof(struct pktgen_hdr);
2861 if (net_ratelimit())
2862 printk(KERN_INFO "pktgen: increased datalen to %d\n",
2863 datalen);
2864 }
2865
2866 udph->source = htons(pkt_dev->cur_udp_src);
2867 udph->dest = htons(pkt_dev->cur_udp_dst);
2868 udph->len = htons(datalen + sizeof(struct udphdr));
2869 udph->check = 0; /* No checksum */
2870
2871 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2872
2873 if (pkt_dev->traffic_class) {
2874 /* Version + traffic class + flow (0) */
2875 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2876 }
2877
2878 iph->hop_limit = 32;
2879
2880 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
2881 iph->nexthdr = IPPROTO_UDP;
2882
2883 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
2884 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
2885
2886 skb->mac_header = (skb->network_header - ETH_HLEN -
2887 pkt_dev->pkt_overhead);
2888 skb->protocol = protocol;
2889 skb->dev = odev;
2890 skb->pkt_type = PACKET_HOST;
2891
2892 if (pkt_dev->nfrags <= 0)
2893 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2894 else {
2895 int frags = pkt_dev->nfrags;
2896 int i;
2897
2898 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2899
2900 if (frags > MAX_SKB_FRAGS)
2901 frags = MAX_SKB_FRAGS;
2902 if (datalen > frags * PAGE_SIZE) {
2903 skb_put(skb, datalen - frags * PAGE_SIZE);
2904 datalen = frags * PAGE_SIZE;
2905 }
2906
2907 i = 0;
2908 while (datalen > 0) {
2909 struct page *page = alloc_pages(GFP_KERNEL, 0);
2910 skb_shinfo(skb)->frags[i].page = page;
2911 skb_shinfo(skb)->frags[i].page_offset = 0;
2912 skb_shinfo(skb)->frags[i].size =
2913 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2914 datalen -= skb_shinfo(skb)->frags[i].size;
2915 skb->len += skb_shinfo(skb)->frags[i].size;
2916 skb->data_len += skb_shinfo(skb)->frags[i].size;
2917 i++;
2918 skb_shinfo(skb)->nr_frags = i;
2919 }
2920
2921 while (i < frags) {
2922 int rem;
2923
2924 if (i == 0)
2925 break;
2926
2927 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2928 if (rem == 0)
2929 break;
2930
2931 skb_shinfo(skb)->frags[i - 1].size -= rem;
2932
2933 skb_shinfo(skb)->frags[i] =
2934 skb_shinfo(skb)->frags[i - 1];
2935 get_page(skb_shinfo(skb)->frags[i].page);
2936 skb_shinfo(skb)->frags[i].page =
2937 skb_shinfo(skb)->frags[i - 1].page;
2938 skb_shinfo(skb)->frags[i].page_offset +=
2939 skb_shinfo(skb)->frags[i - 1].size;
2940 skb_shinfo(skb)->frags[i].size = rem;
2941 i++;
2942 skb_shinfo(skb)->nr_frags = i;
2943 }
2944 }
2945
2946 /* Stamp the time, and sequence number, convert them to network byte order */
2947 /* should we update cloned packets too ? */
2948 if (pgh) {
2949 struct timeval timestamp;
2950
2951 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2952 pgh->seq_num = htonl(pkt_dev->seq_num);
2953
2954 do_gettimeofday(&timestamp);
2955 pgh->tv_sec = htonl(timestamp.tv_sec);
2956 pgh->tv_usec = htonl(timestamp.tv_usec);
2957 }
2958 /* pkt_dev->seq_num++; FF: you really mean this? */
2959
2960 return skb;
2961 }
2962
2963 static inline struct sk_buff *fill_packet(struct net_device *odev,
2964 struct pktgen_dev *pkt_dev)
2965 {
2966 if (pkt_dev->flags & F_IPV6)
2967 return fill_packet_ipv6(odev, pkt_dev);
2968 else
2969 return fill_packet_ipv4(odev, pkt_dev);
2970 }
2971
2972 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2973 {
2974 pkt_dev->seq_num = 1;
2975 pkt_dev->idle_acc = 0;
2976 pkt_dev->sofar = 0;
2977 pkt_dev->tx_bytes = 0;
2978 pkt_dev->errors = 0;
2979 }
2980
2981 /* Set up structure for sending pkts, clear counters */
2982
2983 static void pktgen_run(struct pktgen_thread *t)
2984 {
2985 struct pktgen_dev *pkt_dev;
2986 int started = 0;
2987
2988 pr_debug("pktgen: entering pktgen_run. %p\n", t);
2989
2990 if_lock(t);
2991 list_for_each_entry(pkt_dev, &t->if_list, list) {
2992
2993 /*
2994 * setup odev and create initial packet.
2995 */
2996 pktgen_setup_inject(pkt_dev);
2997
2998 if (pkt_dev->odev) {
2999 pktgen_clear_counters(pkt_dev);
3000 pkt_dev->running = 1; /* Cranke yeself! */
3001 pkt_dev->skb = NULL;
3002 pkt_dev->started_at = getCurUs();
3003 pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */
3004 pkt_dev->next_tx_ns = 0;
3005 set_pkt_overhead(pkt_dev);
3006
3007 strcpy(pkt_dev->result, "Starting");
3008 started++;
3009 } else
3010 strcpy(pkt_dev->result, "Error starting");
3011 }
3012 if_unlock(t);
3013 if (started)
3014 t->control &= ~(T_STOP);
3015 }
3016
3017 static void pktgen_stop_all_threads_ifs(void)
3018 {
3019 struct pktgen_thread *t;
3020
3021 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n");
3022
3023 mutex_lock(&pktgen_thread_lock);
3024
3025 list_for_each_entry(t, &pktgen_threads, th_list)
3026 t->control |= T_STOP;
3027
3028 mutex_unlock(&pktgen_thread_lock);
3029 }
3030
3031 static int thread_is_running(struct pktgen_thread *t)
3032 {
3033 struct pktgen_dev *pkt_dev;
3034 int res = 0;
3035
3036 list_for_each_entry(pkt_dev, &t->if_list, list)
3037 if (pkt_dev->running) {
3038 res = 1;
3039 break;
3040 }
3041 return res;
3042 }
3043
3044 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3045 {
3046 if_lock(t);
3047
3048 while (thread_is_running(t)) {
3049
3050 if_unlock(t);
3051
3052 msleep_interruptible(100);
3053
3054 if (signal_pending(current))
3055 goto signal;
3056 if_lock(t);
3057 }
3058 if_unlock(t);
3059 return 1;
3060 signal:
3061 return 0;
3062 }
3063
3064 static int pktgen_wait_all_threads_run(void)
3065 {
3066 struct pktgen_thread *t;
3067 int sig = 1;
3068
3069 mutex_lock(&pktgen_thread_lock);
3070
3071 list_for_each_entry(t, &pktgen_threads, th_list) {
3072 sig = pktgen_wait_thread_run(t);
3073 if (sig == 0)
3074 break;
3075 }
3076
3077 if (sig == 0)
3078 list_for_each_entry(t, &pktgen_threads, th_list)
3079 t->control |= (T_STOP);
3080
3081 mutex_unlock(&pktgen_thread_lock);
3082 return sig;
3083 }
3084
3085 static void pktgen_run_all_threads(void)
3086 {
3087 struct pktgen_thread *t;
3088
3089 pr_debug("pktgen: entering pktgen_run_all_threads.\n");
3090
3091 mutex_lock(&pktgen_thread_lock);
3092
3093 list_for_each_entry(t, &pktgen_threads, th_list)
3094 t->control |= (T_RUN);
3095
3096 mutex_unlock(&pktgen_thread_lock);
3097
3098 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
3099
3100 pktgen_wait_all_threads_run();
3101 }
3102
3103 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3104 {
3105 __u64 total_us, bps, mbps, pps, idle;
3106 char *p = pkt_dev->result;
3107
3108 total_us = pkt_dev->stopped_at - pkt_dev->started_at;
3109
3110 idle = pkt_dev->idle_acc;
3111
3112 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3113 (unsigned long long)total_us,
3114 (unsigned long long)(total_us - idle),
3115 (unsigned long long)idle,
3116 (unsigned long long)pkt_dev->sofar,
3117 pkt_dev->cur_pkt_size, nr_frags);
3118
3119 pps = pkt_dev->sofar * USEC_PER_SEC;
3120
3121 while ((total_us >> 32) != 0) {
3122 pps >>= 1;
3123 total_us >>= 1;
3124 }
3125
3126 do_div(pps, total_us);
3127
3128 bps = pps * 8 * pkt_dev->cur_pkt_size;
3129
3130 mbps = bps;
3131 do_div(mbps, 1000000);
3132 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3133 (unsigned long long)pps,
3134 (unsigned long long)mbps,
3135 (unsigned long long)bps,
3136 (unsigned long long)pkt_dev->errors);
3137 }
3138
3139 /* Set stopped-at timer, remove from running list, do counters & statistics */
3140
3141 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3142 {
3143 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3144
3145 if (!pkt_dev->running) {
3146 printk(KERN_WARNING "pktgen: interface: %s is already "
3147 "stopped\n", pkt_dev->odev->name);
3148 return -EINVAL;
3149 }
3150
3151 pkt_dev->stopped_at = getCurUs();
3152 pkt_dev->running = 0;
3153
3154 show_results(pkt_dev, nr_frags);
3155
3156 return 0;
3157 }
3158
3159 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3160 {
3161 struct pktgen_dev *pkt_dev, *best = NULL;
3162
3163 if_lock(t);
3164
3165 list_for_each_entry(pkt_dev, &t->if_list, list) {
3166 if (!pkt_dev->running)
3167 continue;
3168 if (best == NULL)
3169 best = pkt_dev;
3170 else if (pkt_dev->next_tx_us < best->next_tx_us)
3171 best = pkt_dev;
3172 }
3173 if_unlock(t);
3174 return best;
3175 }
3176
3177 static void pktgen_stop(struct pktgen_thread *t)
3178 {
3179 struct pktgen_dev *pkt_dev;
3180
3181 pr_debug("pktgen: entering pktgen_stop\n");
3182
3183 if_lock(t);
3184
3185 list_for_each_entry(pkt_dev, &t->if_list, list) {
3186 pktgen_stop_device(pkt_dev);
3187 if (pkt_dev->skb)
3188 kfree_skb(pkt_dev->skb);
3189
3190 pkt_dev->skb = NULL;
3191 }
3192
3193 if_unlock(t);
3194 }
3195
3196 /*
3197 * one of our devices needs to be removed - find it
3198 * and remove it
3199 */
3200 static void pktgen_rem_one_if(struct pktgen_thread *t)
3201 {
3202 struct list_head *q, *n;
3203 struct pktgen_dev *cur;
3204
3205 pr_debug("pktgen: entering pktgen_rem_one_if\n");
3206
3207 if_lock(t);
3208
3209 list_for_each_safe(q, n, &t->if_list) {
3210 cur = list_entry(q, struct pktgen_dev, list);
3211
3212 if (!cur->removal_mark)
3213 continue;
3214
3215 if (cur->skb)
3216 kfree_skb(cur->skb);
3217 cur->skb = NULL;
3218
3219 pktgen_remove_device(t, cur);
3220
3221 break;
3222 }
3223
3224 if_unlock(t);
3225 }
3226
3227 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3228 {
3229 struct list_head *q, *n;
3230 struct pktgen_dev *cur;
3231
3232 /* Remove all devices, free mem */
3233
3234 pr_debug("pktgen: entering pktgen_rem_all_ifs\n");
3235 if_lock(t);
3236
3237 list_for_each_safe(q, n, &t->if_list) {
3238 cur = list_entry(q, struct pktgen_dev, list);
3239
3240 if (cur->skb)
3241 kfree_skb(cur->skb);
3242 cur->skb = NULL;
3243
3244 pktgen_remove_device(t, cur);
3245 }
3246
3247 if_unlock(t);
3248 }
3249
3250 static void pktgen_rem_thread(struct pktgen_thread *t)
3251 {
3252 /* Remove from the thread list */
3253
3254 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3255
3256 mutex_lock(&pktgen_thread_lock);
3257
3258 list_del(&t->th_list);
3259
3260 mutex_unlock(&pktgen_thread_lock);
3261 }
3262
3263 static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
3264 {
3265 struct net_device *odev = NULL;
3266 __u64 idle_start = 0;
3267 int ret;
3268
3269 odev = pkt_dev->odev;
3270
3271 if (pkt_dev->delay_us || pkt_dev->delay_ns) {
3272 u64 now;
3273
3274 now = getCurUs();
3275 if (now < pkt_dev->next_tx_us)
3276 spin(pkt_dev, pkt_dev->next_tx_us);
3277
3278 /* This is max DELAY, this has special meaning of
3279 * "never transmit"
3280 */
3281 if (pkt_dev->delay_us == 0x7FFFFFFF) {
3282 pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us;
3283 pkt_dev->next_tx_ns = pkt_dev->delay_ns;
3284 goto out;
3285 }
3286 }
3287
3288 if ((netif_queue_stopped(odev) ||
3289 (pkt_dev->skb &&
3290 netif_subqueue_stopped(odev, pkt_dev->skb))) ||
3291 need_resched()) {
3292 idle_start = getCurUs();
3293
3294 if (!netif_running(odev)) {
3295 pktgen_stop_device(pkt_dev);
3296 if (pkt_dev->skb)
3297 kfree_skb(pkt_dev->skb);
3298 pkt_dev->skb = NULL;
3299 goto out;
3300 }
3301 if (need_resched())
3302 schedule();
3303
3304 pkt_dev->idle_acc += getCurUs() - idle_start;
3305
3306 if (netif_queue_stopped(odev) ||
3307 netif_subqueue_stopped(odev, pkt_dev->skb)) {
3308 pkt_dev->next_tx_us = getCurUs(); /* TODO */
3309 pkt_dev->next_tx_ns = 0;
3310 goto out; /* Try the next interface */
3311 }
3312 }
3313
3314 if (pkt_dev->last_ok || !pkt_dev->skb) {
3315 if ((++pkt_dev->clone_count >= pkt_dev->clone_skb)
3316 || (!pkt_dev->skb)) {
3317 /* build a new pkt */
3318 if (pkt_dev->skb)
3319 kfree_skb(pkt_dev->skb);
3320
3321 pkt_dev->skb = fill_packet(odev, pkt_dev);
3322 if (pkt_dev->skb == NULL) {
3323 printk(KERN_ERR "pktgen: ERROR: couldn't "
3324 "allocate skb in fill_packet.\n");
3325 schedule();
3326 pkt_dev->clone_count--; /* back out increment, OOM */
3327 goto out;
3328 }
3329 pkt_dev->allocated_skbs++;
3330 pkt_dev->clone_count = 0; /* reset counter */
3331 }
3332 }
3333
3334 netif_tx_lock_bh(odev);
3335 if (!netif_queue_stopped(odev) &&
3336 !netif_subqueue_stopped(odev, pkt_dev->skb)) {
3337
3338 atomic_inc(&(pkt_dev->skb->users));
3339 retry_now:
3340 ret = odev->hard_start_xmit(pkt_dev->skb, odev);
3341 if (likely(ret == NETDEV_TX_OK)) {
3342 pkt_dev->last_ok = 1;
3343 pkt_dev->sofar++;
3344 pkt_dev->seq_num++;
3345 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size;
3346
3347 } else if (ret == NETDEV_TX_LOCKED
3348 && (odev->features & NETIF_F_LLTX)) {
3349 cpu_relax();
3350 goto retry_now;
3351 } else { /* Retry it next time */
3352
3353 atomic_dec(&(pkt_dev->skb->users));
3354
3355 if (debug && net_ratelimit())
3356 printk(KERN_INFO "pktgen: Hard xmit error\n");
3357
3358 pkt_dev->errors++;
3359 pkt_dev->last_ok = 0;
3360 }
3361
3362 pkt_dev->next_tx_us = getCurUs();
3363 pkt_dev->next_tx_ns = 0;
3364
3365 pkt_dev->next_tx_us += pkt_dev->delay_us;
3366 pkt_dev->next_tx_ns += pkt_dev->delay_ns;
3367
3368 if (pkt_dev->next_tx_ns > 1000) {
3369 pkt_dev->next_tx_us++;
3370 pkt_dev->next_tx_ns -= 1000;
3371 }
3372 }
3373
3374 else { /* Retry it next time */
3375 pkt_dev->last_ok = 0;
3376 pkt_dev->next_tx_us = getCurUs(); /* TODO */
3377 pkt_dev->next_tx_ns = 0;
3378 }
3379
3380 netif_tx_unlock_bh(odev);
3381
3382 /* If pkt_dev->count is zero, then run forever */
3383 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3384 if (atomic_read(&(pkt_dev->skb->users)) != 1) {
3385 idle_start = getCurUs();
3386 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3387 if (signal_pending(current)) {
3388 break;
3389 }
3390 schedule();
3391 }
3392 pkt_dev->idle_acc += getCurUs() - idle_start;
3393 }
3394
3395 /* Done with this */
3396 pktgen_stop_device(pkt_dev);
3397 if (pkt_dev->skb)
3398 kfree_skb(pkt_dev->skb);
3399 pkt_dev->skb = NULL;
3400 }
3401 out:;
3402 }
3403
3404 /*
3405 * Main loop of the thread goes here
3406 */
3407
3408 static int pktgen_thread_worker(void *arg)
3409 {
3410 DEFINE_WAIT(wait);
3411 struct pktgen_thread *t = arg;
3412 struct pktgen_dev *pkt_dev = NULL;
3413 int cpu = t->cpu;
3414
3415 BUG_ON(smp_processor_id() != cpu);
3416
3417 init_waitqueue_head(&t->queue);
3418 complete(&t->start_done);
3419
3420 pr_debug("pktgen: starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3421
3422 set_current_state(TASK_INTERRUPTIBLE);
3423
3424 set_freezable();
3425
3426 while (!kthread_should_stop()) {
3427 pkt_dev = next_to_run(t);
3428
3429 if (!pkt_dev &&
3430 (t->control & (T_STOP | T_RUN | T_REMDEVALL | T_REMDEV))
3431 == 0) {
3432 prepare_to_wait(&(t->queue), &wait,
3433 TASK_INTERRUPTIBLE);
3434 schedule_timeout(HZ / 10);
3435 finish_wait(&(t->queue), &wait);
3436 }
3437
3438 __set_current_state(TASK_RUNNING);
3439
3440 if (pkt_dev)
3441 pktgen_xmit(pkt_dev);
3442
3443 if (t->control & T_STOP) {
3444 pktgen_stop(t);
3445 t->control &= ~(T_STOP);
3446 }
3447
3448 if (t->control & T_RUN) {
3449 pktgen_run(t);
3450 t->control &= ~(T_RUN);
3451 }
3452
3453 if (t->control & T_REMDEVALL) {
3454 pktgen_rem_all_ifs(t);
3455 t->control &= ~(T_REMDEVALL);
3456 }
3457
3458 if (t->control & T_REMDEV) {
3459 pktgen_rem_one_if(t);
3460 t->control &= ~(T_REMDEV);
3461 }
3462
3463 try_to_freeze();
3464
3465 set_current_state(TASK_INTERRUPTIBLE);
3466 }
3467
3468 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm);
3469 pktgen_stop(t);
3470
3471 pr_debug("pktgen: %s removing all device\n", t->tsk->comm);
3472 pktgen_rem_all_ifs(t);
3473
3474 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm);
3475 pktgen_rem_thread(t);
3476
3477 return 0;
3478 }
3479
3480 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3481 const char *ifname)
3482 {
3483 struct pktgen_dev *p, *pkt_dev = NULL;
3484 if_lock(t);
3485
3486 list_for_each_entry(p, &t->if_list, list)
3487 if (strncmp(p->odev->name, ifname, IFNAMSIZ) == 0) {
3488 pkt_dev = p;
3489 break;
3490 }
3491
3492 if_unlock(t);
3493 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev);
3494 return pkt_dev;
3495 }
3496
3497 /*
3498 * Adds a dev at front of if_list.
3499 */
3500
3501 static int add_dev_to_thread(struct pktgen_thread *t,
3502 struct pktgen_dev *pkt_dev)
3503 {
3504 int rv = 0;
3505
3506 if_lock(t);
3507
3508 if (pkt_dev->pg_thread) {
3509 printk(KERN_ERR "pktgen: ERROR: already assigned "
3510 "to a thread.\n");
3511 rv = -EBUSY;
3512 goto out;
3513 }
3514
3515 list_add(&pkt_dev->list, &t->if_list);
3516 pkt_dev->pg_thread = t;
3517 pkt_dev->running = 0;
3518
3519 out:
3520 if_unlock(t);
3521 return rv;
3522 }
3523
3524 /* Called under thread lock */
3525
3526 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3527 {
3528 struct pktgen_dev *pkt_dev;
3529 int err;
3530
3531 /* We don't allow a device to be on several threads */
3532
3533 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3534 if (pkt_dev) {
3535 printk(KERN_ERR "pktgen: ERROR: interface already used.\n");
3536 return -EBUSY;
3537 }
3538
3539 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
3540 if (!pkt_dev)
3541 return -ENOMEM;
3542
3543 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state));
3544 if (pkt_dev->flows == NULL) {
3545 kfree(pkt_dev);
3546 return -ENOMEM;
3547 }
3548 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3549
3550 pkt_dev->removal_mark = 0;
3551 pkt_dev->min_pkt_size = ETH_ZLEN;
3552 pkt_dev->max_pkt_size = ETH_ZLEN;
3553 pkt_dev->nfrags = 0;
3554 pkt_dev->clone_skb = pg_clone_skb_d;
3555 pkt_dev->delay_us = pg_delay_d / 1000;
3556 pkt_dev->delay_ns = pg_delay_d % 1000;
3557 pkt_dev->count = pg_count_d;
3558 pkt_dev->sofar = 0;
3559 pkt_dev->udp_src_min = 9; /* sink port */
3560 pkt_dev->udp_src_max = 9;
3561 pkt_dev->udp_dst_min = 9;
3562 pkt_dev->udp_dst_max = 9;
3563
3564 pkt_dev->vlan_p = 0;
3565 pkt_dev->vlan_cfi = 0;
3566 pkt_dev->vlan_id = 0xffff;
3567 pkt_dev->svlan_p = 0;
3568 pkt_dev->svlan_cfi = 0;
3569 pkt_dev->svlan_id = 0xffff;
3570
3571 err = pktgen_setup_dev(pkt_dev, ifname);
3572 if (err)
3573 goto out1;
3574
3575 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3576 &pktgen_if_fops, pkt_dev);
3577 if (!pkt_dev->entry) {
3578 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3579 PG_PROC_DIR, ifname);
3580 err = -EINVAL;
3581 goto out2;
3582 }
3583 #ifdef CONFIG_XFRM
3584 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3585 pkt_dev->ipsproto = IPPROTO_ESP;
3586 #endif
3587
3588 return add_dev_to_thread(t, pkt_dev);
3589 out2:
3590 dev_put(pkt_dev->odev);
3591 out1:
3592 #ifdef CONFIG_XFRM
3593 free_SAs(pkt_dev);
3594 #endif
3595 if (pkt_dev->flows)
3596 vfree(pkt_dev->flows);
3597 kfree(pkt_dev);
3598 return err;
3599 }
3600
3601 static int __init pktgen_create_thread(int cpu)
3602 {
3603 struct pktgen_thread *t;
3604 struct proc_dir_entry *pe;
3605 struct task_struct *p;
3606
3607 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL);
3608 if (!t) {
3609 printk(KERN_ERR "pktgen: ERROR: out of memory, can't "
3610 "create new thread.\n");
3611 return -ENOMEM;
3612 }
3613
3614 spin_lock_init(&t->if_lock);
3615 t->cpu = cpu;
3616
3617 INIT_LIST_HEAD(&t->if_list);
3618
3619 list_add_tail(&t->th_list, &pktgen_threads);
3620 init_completion(&t->start_done);
3621
3622 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu);
3623 if (IS_ERR(p)) {
3624 printk(KERN_ERR "pktgen: kernel_thread() failed "
3625 "for cpu %d\n", t->cpu);
3626 list_del(&t->th_list);
3627 kfree(t);
3628 return PTR_ERR(p);
3629 }
3630 kthread_bind(p, cpu);
3631 t->tsk = p;
3632
3633 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3634 &pktgen_thread_fops, t);
3635 if (!pe) {
3636 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3637 PG_PROC_DIR, t->tsk->comm);
3638 kthread_stop(p);
3639 list_del(&t->th_list);
3640 kfree(t);
3641 return -EINVAL;
3642 }
3643
3644 wake_up_process(p);
3645 wait_for_completion(&t->start_done);
3646
3647 return 0;
3648 }
3649
3650 /*
3651 * Removes a device from the thread if_list.
3652 */
3653 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3654 struct pktgen_dev *pkt_dev)
3655 {
3656 struct list_head *q, *n;
3657 struct pktgen_dev *p;
3658
3659 list_for_each_safe(q, n, &t->if_list) {
3660 p = list_entry(q, struct pktgen_dev, list);
3661 if (p == pkt_dev)
3662 list_del(&p->list);
3663 }
3664 }
3665
3666 static int pktgen_remove_device(struct pktgen_thread *t,
3667 struct pktgen_dev *pkt_dev)
3668 {
3669
3670 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev);
3671
3672 if (pkt_dev->running) {
3673 printk(KERN_WARNING "pktgen: WARNING: trying to remove a "
3674 "running interface, stopping it now.\n");
3675 pktgen_stop_device(pkt_dev);
3676 }
3677
3678 /* Dis-associate from the interface */
3679
3680 if (pkt_dev->odev) {
3681 dev_put(pkt_dev->odev);
3682 pkt_dev->odev = NULL;
3683 }
3684
3685 /* And update the thread if_list */
3686
3687 _rem_dev_from_if_list(t, pkt_dev);
3688
3689 if (pkt_dev->entry)
3690 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3691
3692 #ifdef CONFIG_XFRM
3693 free_SAs(pkt_dev);
3694 #endif
3695 if (pkt_dev->flows)
3696 vfree(pkt_dev->flows);
3697 kfree(pkt_dev);
3698 return 0;
3699 }
3700
3701 static int __init pg_init(void)
3702 {
3703 int cpu;
3704 struct proc_dir_entry *pe;
3705
3706 printk(KERN_INFO "%s", version);
3707
3708 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3709 if (!pg_proc_dir)
3710 return -ENODEV;
3711 pg_proc_dir->owner = THIS_MODULE;
3712
3713 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3714 if (pe == NULL) {
3715 printk(KERN_ERR "pktgen: ERROR: cannot create %s "
3716 "procfs entry.\n", PGCTRL);
3717 proc_net_remove(&init_net, PG_PROC_DIR);
3718 return -EINVAL;
3719 }
3720
3721 /* Register us to receive netdevice events */
3722 register_netdevice_notifier(&pktgen_notifier_block);
3723
3724 for_each_online_cpu(cpu) {
3725 int err;
3726
3727 err = pktgen_create_thread(cpu);
3728 if (err)
3729 printk(KERN_WARNING "pktgen: WARNING: Cannot create "
3730 "thread for cpu %d (%d)\n", cpu, err);
3731 }
3732
3733 if (list_empty(&pktgen_threads)) {
3734 printk(KERN_ERR "pktgen: ERROR: Initialization failed for "
3735 "all threads\n");
3736 unregister_netdevice_notifier(&pktgen_notifier_block);
3737 remove_proc_entry(PGCTRL, pg_proc_dir);
3738 proc_net_remove(&init_net, PG_PROC_DIR);
3739 return -ENODEV;
3740 }
3741
3742 return 0;
3743 }
3744
3745 static void __exit pg_cleanup(void)
3746 {
3747 struct pktgen_thread *t;
3748 struct list_head *q, *n;
3749 wait_queue_head_t queue;
3750 init_waitqueue_head(&queue);
3751
3752 /* Stop all interfaces & threads */
3753
3754 list_for_each_safe(q, n, &pktgen_threads) {
3755 t = list_entry(q, struct pktgen_thread, th_list);
3756 kthread_stop(t->tsk);
3757 kfree(t);
3758 }
3759
3760 /* Un-register us from receiving netdevice events */
3761 unregister_netdevice_notifier(&pktgen_notifier_block);
3762
3763 /* Clean up proc file system */
3764 remove_proc_entry(PGCTRL, pg_proc_dir);
3765 proc_net_remove(&init_net, PG_PROC_DIR);
3766 }
3767
3768 module_init(pg_init);
3769 module_exit(pg_cleanup);
3770
3771 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se");
3772 MODULE_DESCRIPTION("Packet Generator tool");
3773 MODULE_LICENSE("GPL");
3774 module_param(pg_count_d, int, 0);
3775 module_param(pg_delay_d, int, 0);
3776 module_param(pg_clone_skb_d, int, 0);
3777 module_param(debug, int, 0);
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