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Linux 4.19.133
[linux/fpc-iii.git] / net / core / pktgen.c
blob092fa3d75b32a8cef12ee6112343cd44f098618a
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.
73 * The if_list is RCU protected, and the if_lock remains to protect updating
74 * of if_list, from "add_device" as it invoked from userspace (via proc write).
75 *
76 * By design there should only be *one* "controlling" process. In practice
77 * multiple write accesses gives unpredictable result. Understood by "write"
78 * to /proc gives result code thats should be read be the "writer".
79 * For practical use this should be no problem.
80 *
81 * Note when adding devices to a specific CPU there good idea to also assign
82 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
83 * --ro
84 *
85 * Fix refcount off by one if first packet fails, potential null deref,
86 * memleak 030710- KJP
87 *
88 * First "ranges" functionality for ipv6 030726 --ro
89 *
90 * Included flow support. 030802 ANK.
91 *
92 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
93 *
94 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
95 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
96 *
97 * New xmit() return, do_div and misc clean up by Stephen Hemminger
98 * <shemminger@osdl.org> 040923
99 *
100 * Randy Dunlap fixed u64 printk compiler warning
101 *
102 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
103 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
104 *
105 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
106 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
107 *
108 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
109 * 050103
110 *
111 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
112 *
113 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
114 *
115 * Fixed src_mac command to set source mac of packet to value specified in
116 * command by Adit Ranadive <adit.262@gmail.com>
117 *
118 */
119
120 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
121
122 #include <linux/sys.h>
123 #include <linux/types.h>
124 #include <linux/module.h>
125 #include <linux/moduleparam.h>
126 #include <linux/kernel.h>
127 #include <linux/mutex.h>
128 #include <linux/sched.h>
129 #include <linux/slab.h>
130 #include <linux/vmalloc.h>
131 #include <linux/unistd.h>
132 #include <linux/string.h>
133 #include <linux/ptrace.h>
134 #include <linux/errno.h>
135 #include <linux/ioport.h>
136 #include <linux/interrupt.h>
137 #include <linux/capability.h>
138 #include <linux/hrtimer.h>
139 #include <linux/freezer.h>
140 #include <linux/delay.h>
141 #include <linux/timer.h>
142 #include <linux/list.h>
143 #include <linux/init.h>
144 #include <linux/skbuff.h>
145 #include <linux/netdevice.h>
146 #include <linux/inet.h>
147 #include <linux/inetdevice.h>
148 #include <linux/rtnetlink.h>
149 #include <linux/if_arp.h>
150 #include <linux/if_vlan.h>
151 #include <linux/in.h>
152 #include <linux/ip.h>
153 #include <linux/ipv6.h>
154 #include <linux/udp.h>
155 #include <linux/proc_fs.h>
156 #include <linux/seq_file.h>
157 #include <linux/wait.h>
158 #include <linux/etherdevice.h>
159 #include <linux/kthread.h>
160 #include <linux/prefetch.h>
161 #include <net/net_namespace.h>
162 #include <net/checksum.h>
163 #include <net/ipv6.h>
164 #include <net/udp.h>
165 #include <net/ip6_checksum.h>
166 #include <net/addrconf.h>
167 #ifdef CONFIG_XFRM
168 #include <net/xfrm.h>
169 #endif
170 #include <net/netns/generic.h>
171 #include <asm/byteorder.h>
172 #include <linux/rcupdate.h>
173 #include <linux/bitops.h>
174 #include <linux/io.h>
175 #include <linux/timex.h>
176 #include <linux/uaccess.h>
177 #include <asm/dma.h>
178 #include <asm/div64.h> /* do_div */
179
180 #define VERSION "2.75"
181 #define IP_NAME_SZ 32
182 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
183 #define MPLS_STACK_BOTTOM htonl(0x00000100)
184
185 #define func_enter() pr_debug("entering %s\n", __func__);
186
187 #define PKT_FLAGS \
188 pf(IPV6) /* Interface in IPV6 Mode */ \
189 pf(IPSRC_RND) /* IP-Src Random */ \
190 pf(IPDST_RND) /* IP-Dst Random */ \
191 pf(TXSIZE_RND) /* Transmit size is random */ \
192 pf(UDPSRC_RND) /* UDP-Src Random */ \
193 pf(UDPDST_RND) /* UDP-Dst Random */ \
194 pf(UDPCSUM) /* Include UDP checksum */ \
195 pf(NO_TIMESTAMP) /* Don't timestamp packets (default TS) */ \
196 pf(MPLS_RND) /* Random MPLS labels */ \
197 pf(QUEUE_MAP_RND) /* queue map Random */ \
198 pf(QUEUE_MAP_CPU) /* queue map mirrors smp_processor_id() */ \
199 pf(FLOW_SEQ) /* Sequential flows */ \
200 pf(IPSEC) /* ipsec on for flows */ \
201 pf(MACSRC_RND) /* MAC-Src Random */ \
202 pf(MACDST_RND) /* MAC-Dst Random */ \
203 pf(VID_RND) /* Random VLAN ID */ \
204 pf(SVID_RND) /* Random SVLAN ID */ \
205 pf(NODE) /* Node memory alloc*/ \
206
207 #define pf(flag) flag##_SHIFT,
208 enum pkt_flags {
209 PKT_FLAGS
210 };
211 #undef pf
212
213 /* Device flag bits */
214 #define pf(flag) static const __u32 F_##flag = (1<<flag##_SHIFT);
215 PKT_FLAGS
216 #undef pf
217
218 #define pf(flag) __stringify(flag),
219 static char *pkt_flag_names[] = {
220 PKT_FLAGS
221 };
222 #undef pf
223
224 #define NR_PKT_FLAGS ARRAY_SIZE(pkt_flag_names)
225
226 /* Thread control flag bits */
227 #define T_STOP (1<<0) /* Stop run */
228 #define T_RUN (1<<1) /* Start run */
229 #define T_REMDEVALL (1<<2) /* Remove all devs */
230 #define T_REMDEV (1<<3) /* Remove one dev */
231
232 /* Xmit modes */
233 #define M_START_XMIT 0 /* Default normal TX */
234 #define M_NETIF_RECEIVE 1 /* Inject packets into stack */
235 #define M_QUEUE_XMIT 2 /* Inject packet into qdisc */
236
237 /* If lock -- protects updating of if_list */
238 #define if_lock(t) mutex_lock(&(t->if_lock));
239 #define if_unlock(t) mutex_unlock(&(t->if_lock));
240
241 /* Used to help with determining the pkts on receive */
242 #define PKTGEN_MAGIC 0xbe9be955
243 #define PG_PROC_DIR "pktgen"
244 #define PGCTRL "pgctrl"
245
246 #define MAX_CFLOWS 65536
247
248 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
249 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
250
251 struct flow_state {
252 __be32 cur_daddr;
253 int count;
254 #ifdef CONFIG_XFRM
255 struct xfrm_state *x;
256 #endif
257 __u32 flags;
258 };
259
260 /* flow flag bits */
261 #define F_INIT (1<<0) /* flow has been initialized */
262
263 struct pktgen_dev {
264 /*
265 * Try to keep frequent/infrequent used vars. separated.
266 */
267 struct proc_dir_entry *entry; /* proc file */
268 struct pktgen_thread *pg_thread;/* the owner */
269 struct list_head list; /* chaining in the thread's run-queue */
270 struct rcu_head rcu; /* freed by RCU */
271
272 int running; /* if false, the test will stop */
273
274 /* If min != max, then we will either do a linear iteration, or
275 * we will do a random selection from within the range.
276 */
277 __u32 flags;
278 int xmit_mode;
279 int min_pkt_size;
280 int max_pkt_size;
281 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
282 int nfrags;
283 int removal_mark; /* non-zero => the device is marked for
284 * removal by worker thread */
285
286 struct page *page;
287 u64 delay; /* nano-seconds */
288
289 __u64 count; /* Default No packets to send */
290 __u64 sofar; /* How many pkts we've sent so far */
291 __u64 tx_bytes; /* How many bytes we've transmitted */
292 __u64 errors; /* Errors when trying to transmit, */
293
294 /* runtime counters relating to clone_skb */
295
296 __u32 clone_count;
297 int last_ok; /* Was last skb sent?
298 * Or a failed transmit of some sort?
299 * This will keep sequence numbers in order
300 */
301 ktime_t next_tx;
302 ktime_t started_at;
303 ktime_t stopped_at;
304 u64 idle_acc; /* nano-seconds */
305
306 __u32 seq_num;
307
308 int clone_skb; /*
309 * Use multiple SKBs during packet gen.
310 * If this number is greater than 1, then
311 * that many copies of the same packet will be
312 * sent before a new packet is allocated.
313 * If you want to send 1024 identical packets
314 * before creating a new packet,
315 * set clone_skb to 1024.
316 */
317
318 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
319 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
320 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
321 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
322
323 struct in6_addr in6_saddr;
324 struct in6_addr in6_daddr;
325 struct in6_addr cur_in6_daddr;
326 struct in6_addr cur_in6_saddr;
327 /* For ranges */
328 struct in6_addr min_in6_daddr;
329 struct in6_addr max_in6_daddr;
330 struct in6_addr min_in6_saddr;
331 struct in6_addr max_in6_saddr;
332
333 /* If we're doing ranges, random or incremental, then this
334 * defines the min/max for those ranges.
335 */
336 __be32 saddr_min; /* inclusive, source IP address */
337 __be32 saddr_max; /* exclusive, source IP address */
338 __be32 daddr_min; /* inclusive, dest IP address */
339 __be32 daddr_max; /* exclusive, dest IP address */
340
341 __u16 udp_src_min; /* inclusive, source UDP port */
342 __u16 udp_src_max; /* exclusive, source UDP port */
343 __u16 udp_dst_min; /* inclusive, dest UDP port */
344 __u16 udp_dst_max; /* exclusive, dest UDP port */
345
346 /* DSCP + ECN */
347 __u8 tos; /* six MSB of (former) IPv4 TOS
348 are for dscp codepoint */
349 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
350 (see RFC 3260, sec. 4) */
351
352 /* MPLS */
353 unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */
354 __be32 labels[MAX_MPLS_LABELS];
355
356 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
357 __u8 vlan_p;
358 __u8 vlan_cfi;
359 __u16 vlan_id; /* 0xffff means no vlan tag */
360
361 __u8 svlan_p;
362 __u8 svlan_cfi;
363 __u16 svlan_id; /* 0xffff means no svlan tag */
364
365 __u32 src_mac_count; /* How many MACs to iterate through */
366 __u32 dst_mac_count; /* How many MACs to iterate through */
367
368 unsigned char dst_mac[ETH_ALEN];
369 unsigned char src_mac[ETH_ALEN];
370
371 __u32 cur_dst_mac_offset;
372 __u32 cur_src_mac_offset;
373 __be32 cur_saddr;
374 __be32 cur_daddr;
375 __u16 ip_id;
376 __u16 cur_udp_dst;
377 __u16 cur_udp_src;
378 __u16 cur_queue_map;
379 __u32 cur_pkt_size;
380 __u32 last_pkt_size;
381
382 __u8 hh[14];
383 /* = {
384 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
385
386 We fill in SRC address later
387 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
388 0x08, 0x00
389 };
390 */
391 __u16 pad; /* pad out the hh struct to an even 16 bytes */
392
393 struct sk_buff *skb; /* skb we are to transmit next, used for when we
394 * are transmitting the same one multiple times
395 */
396 struct net_device *odev; /* The out-going device.
397 * Note that the device should have it's
398 * pg_info pointer pointing back to this
399 * device.
400 * Set when the user specifies the out-going
401 * device name (not when the inject is
402 * started as it used to do.)
403 */
404 char odevname[32];
405 struct flow_state *flows;
406 unsigned int cflows; /* Concurrent flows (config) */
407 unsigned int lflow; /* Flow length (config) */
408 unsigned int nflows; /* accumulated flows (stats) */
409 unsigned int curfl; /* current sequenced flow (state)*/
410
411 u16 queue_map_min;
412 u16 queue_map_max;
413 __u32 skb_priority; /* skb priority field */
414 unsigned int burst; /* number of duplicated packets to burst */
415 int node; /* Memory node */
416
417 #ifdef CONFIG_XFRM
418 __u8 ipsmode; /* IPSEC mode (config) */
419 __u8 ipsproto; /* IPSEC type (config) */
420 __u32 spi;
421 struct xfrm_dst xdst;
422 struct dst_ops dstops;
423 #endif
424 char result[512];
425 };
426
427 struct pktgen_hdr {
428 __be32 pgh_magic;
429 __be32 seq_num;
430 __be32 tv_sec;
431 __be32 tv_usec;
432 };
433
434
435 static unsigned int pg_net_id __read_mostly;
436
437 struct pktgen_net {
438 struct net *net;
439 struct proc_dir_entry *proc_dir;
440 struct list_head pktgen_threads;
441 bool pktgen_exiting;
442 };
443
444 struct pktgen_thread {
445 struct mutex if_lock; /* for list of devices */
446 struct list_head if_list; /* All device here */
447 struct list_head th_list;
448 struct task_struct *tsk;
449 char result[512];
450
451 /* Field for thread to receive "posted" events terminate,
452 stop ifs etc. */
453
454 u32 control;
455 int cpu;
456
457 wait_queue_head_t queue;
458 struct completion start_done;
459 struct pktgen_net *net;
460 };
461
462 #define REMOVE 1
463 #define FIND 0
464
465 static const char version[] =
466 "Packet Generator for packet performance testing. "
467 "Version: " VERSION "\n";
468
469 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
470 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
471 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
472 const char *ifname, bool exact);
473 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
474 static void pktgen_run_all_threads(struct pktgen_net *pn);
475 static void pktgen_reset_all_threads(struct pktgen_net *pn);
476 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn);
477
478 static void pktgen_stop(struct pktgen_thread *t);
479 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
480
481 /* Module parameters, defaults. */
482 static int pg_count_d __read_mostly = 1000;
483 static int pg_delay_d __read_mostly;
484 static int pg_clone_skb_d __read_mostly;
485 static int debug __read_mostly;
486
487 static DEFINE_MUTEX(pktgen_thread_lock);
488
489 static struct notifier_block pktgen_notifier_block = {
490 .notifier_call = pktgen_device_event,
491 };
492
493 /*
494 * /proc handling functions
495 *
496 */
497
498 static int pgctrl_show(struct seq_file *seq, void *v)
499 {
500 seq_puts(seq, version);
501 return 0;
502 }
503
504 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
505 size_t count, loff_t *ppos)
506 {
507 char data[128];
508 struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
509
510 if (!capable(CAP_NET_ADMIN))
511 return -EPERM;
512
513 if (count == 0)
514 return -EINVAL;
515
516 if (count > sizeof(data))
517 count = sizeof(data);
518
519 if (copy_from_user(data, buf, count))
520 return -EFAULT;
521
522 data[count - 1] = 0; /* Strip trailing '\n' and terminate string */
523
524 if (!strcmp(data, "stop"))
525 pktgen_stop_all_threads_ifs(pn);
526
527 else if (!strcmp(data, "start"))
528 pktgen_run_all_threads(pn);
529
530 else if (!strcmp(data, "reset"))
531 pktgen_reset_all_threads(pn);
532
533 else
534 return -EINVAL;
535
536 return count;
537 }
538
539 static int pgctrl_open(struct inode *inode, struct file *file)
540 {
541 return single_open(file, pgctrl_show, PDE_DATA(inode));
542 }
543
544 static const struct file_operations pktgen_fops = {
545 .open = pgctrl_open,
546 .read = seq_read,
547 .llseek = seq_lseek,
548 .write = pgctrl_write,
549 .release = single_release,
550 };
551
552 static int pktgen_if_show(struct seq_file *seq, void *v)
553 {
554 const struct pktgen_dev *pkt_dev = seq->private;
555 ktime_t stopped;
556 unsigned int i;
557 u64 idle;
558
559 seq_printf(seq,
560 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
561 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
562 pkt_dev->max_pkt_size);
563
564 seq_printf(seq,
565 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
566 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
567 pkt_dev->clone_skb, pkt_dev->odevname);
568
569 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
570 pkt_dev->lflow);
571
572 seq_printf(seq,
573 " queue_map_min: %u queue_map_max: %u\n",
574 pkt_dev->queue_map_min,
575 pkt_dev->queue_map_max);
576
577 if (pkt_dev->skb_priority)
578 seq_printf(seq, " skb_priority: %u\n",
579 pkt_dev->skb_priority);
580
581 if (pkt_dev->flags & F_IPV6) {
582 seq_printf(seq,
583 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
584 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
585 &pkt_dev->in6_saddr,
586 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
587 &pkt_dev->in6_daddr,
588 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
589 } else {
590 seq_printf(seq,
591 " dst_min: %s dst_max: %s\n",
592 pkt_dev->dst_min, pkt_dev->dst_max);
593 seq_printf(seq,
594 " src_min: %s src_max: %s\n",
595 pkt_dev->src_min, pkt_dev->src_max);
596 }
597
598 seq_puts(seq, " src_mac: ");
599
600 seq_printf(seq, "%pM ",
601 is_zero_ether_addr(pkt_dev->src_mac) ?
602 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
603
604 seq_puts(seq, "dst_mac: ");
605 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
606
607 seq_printf(seq,
608 " udp_src_min: %d udp_src_max: %d"
609 " udp_dst_min: %d udp_dst_max: %d\n",
610 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
611 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
612
613 seq_printf(seq,
614 " src_mac_count: %d dst_mac_count: %d\n",
615 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
616
617 if (pkt_dev->nr_labels) {
618 seq_puts(seq, " mpls: ");
619 for (i = 0; i < pkt_dev->nr_labels; i++)
620 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
621 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
622 }
623
624 if (pkt_dev->vlan_id != 0xffff)
625 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
626 pkt_dev->vlan_id, pkt_dev->vlan_p,
627 pkt_dev->vlan_cfi);
628
629 if (pkt_dev->svlan_id != 0xffff)
630 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
631 pkt_dev->svlan_id, pkt_dev->svlan_p,
632 pkt_dev->svlan_cfi);
633
634 if (pkt_dev->tos)
635 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
636
637 if (pkt_dev->traffic_class)
638 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
639
640 if (pkt_dev->burst > 1)
641 seq_printf(seq, " burst: %d\n", pkt_dev->burst);
642
643 if (pkt_dev->node >= 0)
644 seq_printf(seq, " node: %d\n", pkt_dev->node);
645
646 if (pkt_dev->xmit_mode == M_NETIF_RECEIVE)
647 seq_puts(seq, " xmit_mode: netif_receive\n");
648 else if (pkt_dev->xmit_mode == M_QUEUE_XMIT)
649 seq_puts(seq, " xmit_mode: xmit_queue\n");
650
651 seq_puts(seq, " Flags: ");
652
653 for (i = 0; i < NR_PKT_FLAGS; i++) {
654 if (i == F_FLOW_SEQ)
655 if (!pkt_dev->cflows)
656 continue;
657
658 if (pkt_dev->flags & (1 << i))
659 seq_printf(seq, "%s ", pkt_flag_names[i]);
660 else if (i == F_FLOW_SEQ)
661 seq_puts(seq, "FLOW_RND ");
662
663 #ifdef CONFIG_XFRM
664 if (i == F_IPSEC && pkt_dev->spi)
665 seq_printf(seq, "spi:%u", pkt_dev->spi);
666 #endif
667 }
668
669 seq_puts(seq, "\n");
670
671 /* not really stopped, more like last-running-at */
672 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at;
673 idle = pkt_dev->idle_acc;
674 do_div(idle, NSEC_PER_USEC);
675
676 seq_printf(seq,
677 "Current:\n pkts-sofar: %llu errors: %llu\n",
678 (unsigned long long)pkt_dev->sofar,
679 (unsigned long long)pkt_dev->errors);
680
681 seq_printf(seq,
682 " started: %lluus stopped: %lluus idle: %lluus\n",
683 (unsigned long long) ktime_to_us(pkt_dev->started_at),
684 (unsigned long long) ktime_to_us(stopped),
685 (unsigned long long) idle);
686
687 seq_printf(seq,
688 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
689 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
690 pkt_dev->cur_src_mac_offset);
691
692 if (pkt_dev->flags & F_IPV6) {
693 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
694 &pkt_dev->cur_in6_saddr,
695 &pkt_dev->cur_in6_daddr);
696 } else
697 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n",
698 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
699
700 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
701 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
702
703 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
704
705 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
706
707 if (pkt_dev->result[0])
708 seq_printf(seq, "Result: %s\n", pkt_dev->result);
709 else
710 seq_puts(seq, "Result: Idle\n");
711
712 return 0;
713 }
714
715
716 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
717 __u32 *num)
718 {
719 int i = 0;
720 *num = 0;
721
722 for (; i < maxlen; i++) {
723 int value;
724 char c;
725 *num <<= 4;
726 if (get_user(c, &user_buffer[i]))
727 return -EFAULT;
728 value = hex_to_bin(c);
729 if (value >= 0)
730 *num |= value;
731 else
732 break;
733 }
734 return i;
735 }
736
737 static int count_trail_chars(const char __user * user_buffer,
738 unsigned int maxlen)
739 {
740 int i;
741
742 for (i = 0; i < maxlen; i++) {
743 char c;
744 if (get_user(c, &user_buffer[i]))
745 return -EFAULT;
746 switch (c) {
747 case '\"':
748 case '\n':
749 case '\r':
750 case '\t':
751 case ' ':
752 case '=':
753 break;
754 default:
755 goto done;
756 }
757 }
758 done:
759 return i;
760 }
761
762 static long num_arg(const char __user *user_buffer, unsigned long maxlen,
763 unsigned long *num)
764 {
765 int i;
766 *num = 0;
767
768 for (i = 0; i < maxlen; i++) {
769 char c;
770 if (get_user(c, &user_buffer[i]))
771 return -EFAULT;
772 if ((c >= '0') && (c <= '9')) {
773 *num *= 10;
774 *num += c - '0';
775 } else
776 break;
777 }
778 return i;
779 }
780
781 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
782 {
783 int i;
784
785 for (i = 0; i < maxlen; i++) {
786 char c;
787 if (get_user(c, &user_buffer[i]))
788 return -EFAULT;
789 switch (c) {
790 case '\"':
791 case '\n':
792 case '\r':
793 case '\t':
794 case ' ':
795 goto done_str;
796 default:
797 break;
798 }
799 }
800 done_str:
801 return i;
802 }
803
804 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
805 {
806 unsigned int n = 0;
807 char c;
808 ssize_t i = 0;
809 int len;
810
811 pkt_dev->nr_labels = 0;
812 do {
813 __u32 tmp;
814 len = hex32_arg(&buffer[i], 8, &tmp);
815 if (len <= 0)
816 return len;
817 pkt_dev->labels[n] = htonl(tmp);
818 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
819 pkt_dev->flags |= F_MPLS_RND;
820 i += len;
821 if (get_user(c, &buffer[i]))
822 return -EFAULT;
823 i++;
824 n++;
825 if (n >= MAX_MPLS_LABELS)
826 return -E2BIG;
827 } while (c == ',');
828
829 pkt_dev->nr_labels = n;
830 return i;
831 }
832
833 static __u32 pktgen_read_flag(const char *f, bool *disable)
834 {
835 __u32 i;
836
837 if (f[0] == '!') {
838 *disable = true;
839 f++;
840 }
841
842 for (i = 0; i < NR_PKT_FLAGS; i++) {
843 if (!IS_ENABLED(CONFIG_XFRM) && i == IPSEC_SHIFT)
844 continue;
845
846 /* allow only disabling ipv6 flag */
847 if (!*disable && i == IPV6_SHIFT)
848 continue;
849
850 if (strcmp(f, pkt_flag_names[i]) == 0)
851 return 1 << i;
852 }
853
854 if (strcmp(f, "FLOW_RND") == 0) {
855 *disable = !*disable;
856 return F_FLOW_SEQ;
857 }
858
859 return 0;
860 }
861
862 static ssize_t pktgen_if_write(struct file *file,
863 const char __user * user_buffer, size_t count,
864 loff_t * offset)
865 {
866 struct seq_file *seq = file->private_data;
867 struct pktgen_dev *pkt_dev = seq->private;
868 int i, max, len;
869 char name[16], valstr[32];
870 unsigned long value = 0;
871 char *pg_result = NULL;
872 int tmp = 0;
873 char buf[128];
874
875 pg_result = &(pkt_dev->result[0]);
876
877 if (count < 1) {
878 pr_warn("wrong command format\n");
879 return -EINVAL;
880 }
881
882 max = count;
883 tmp = count_trail_chars(user_buffer, max);
884 if (tmp < 0) {
885 pr_warn("illegal format\n");
886 return tmp;
887 }
888 i = tmp;
889
890 /* Read variable name */
891
892 len = strn_len(&user_buffer[i], sizeof(name) - 1);
893 if (len < 0)
894 return len;
895
896 memset(name, 0, sizeof(name));
897 if (copy_from_user(name, &user_buffer[i], len))
898 return -EFAULT;
899 i += len;
900
901 max = count - i;
902 len = count_trail_chars(&user_buffer[i], max);
903 if (len < 0)
904 return len;
905
906 i += len;
907
908 if (debug) {
909 size_t copy = min_t(size_t, count + 1, 1024);
910 char *tp = strndup_user(user_buffer, copy);
911
912 if (IS_ERR(tp))
913 return PTR_ERR(tp);
914
915 pr_debug("%s,%zu buffer -:%s:-\n", name, count, tp);
916 kfree(tp);
917 }
918
919 if (!strcmp(name, "min_pkt_size")) {
920 len = num_arg(&user_buffer[i], 10, &value);
921 if (len < 0)
922 return len;
923
924 i += len;
925 if (value < 14 + 20 + 8)
926 value = 14 + 20 + 8;
927 if (value != pkt_dev->min_pkt_size) {
928 pkt_dev->min_pkt_size = value;
929 pkt_dev->cur_pkt_size = value;
930 }
931 sprintf(pg_result, "OK: min_pkt_size=%u",
932 pkt_dev->min_pkt_size);
933 return count;
934 }
935
936 if (!strcmp(name, "max_pkt_size")) {
937 len = num_arg(&user_buffer[i], 10, &value);
938 if (len < 0)
939 return len;
940
941 i += len;
942 if (value < 14 + 20 + 8)
943 value = 14 + 20 + 8;
944 if (value != pkt_dev->max_pkt_size) {
945 pkt_dev->max_pkt_size = value;
946 pkt_dev->cur_pkt_size = value;
947 }
948 sprintf(pg_result, "OK: max_pkt_size=%u",
949 pkt_dev->max_pkt_size);
950 return count;
951 }
952
953 /* Shortcut for min = max */
954
955 if (!strcmp(name, "pkt_size")) {
956 len = num_arg(&user_buffer[i], 10, &value);
957 if (len < 0)
958 return len;
959
960 i += len;
961 if (value < 14 + 20 + 8)
962 value = 14 + 20 + 8;
963 if (value != pkt_dev->min_pkt_size) {
964 pkt_dev->min_pkt_size = value;
965 pkt_dev->max_pkt_size = value;
966 pkt_dev->cur_pkt_size = value;
967 }
968 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
969 return count;
970 }
971
972 if (!strcmp(name, "debug")) {
973 len = num_arg(&user_buffer[i], 10, &value);
974 if (len < 0)
975 return len;
976
977 i += len;
978 debug = value;
979 sprintf(pg_result, "OK: debug=%u", debug);
980 return count;
981 }
982
983 if (!strcmp(name, "frags")) {
984 len = num_arg(&user_buffer[i], 10, &value);
985 if (len < 0)
986 return len;
987
988 i += len;
989 pkt_dev->nfrags = value;
990 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
991 return count;
992 }
993 if (!strcmp(name, "delay")) {
994 len = num_arg(&user_buffer[i], 10, &value);
995 if (len < 0)
996 return len;
997
998 i += len;
999 if (value == 0x7FFFFFFF)
1000 pkt_dev->delay = ULLONG_MAX;
1001 else
1002 pkt_dev->delay = (u64)value;
1003
1004 sprintf(pg_result, "OK: delay=%llu",
1005 (unsigned long long) pkt_dev->delay);
1006 return count;
1007 }
1008 if (!strcmp(name, "rate")) {
1009 len = num_arg(&user_buffer[i], 10, &value);
1010 if (len < 0)
1011 return len;
1012
1013 i += len;
1014 if (!value)
1015 return len;
1016 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
1017 if (debug)
1018 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1019
1020 sprintf(pg_result, "OK: rate=%lu", value);
1021 return count;
1022 }
1023 if (!strcmp(name, "ratep")) {
1024 len = num_arg(&user_buffer[i], 10, &value);
1025 if (len < 0)
1026 return len;
1027
1028 i += len;
1029 if (!value)
1030 return len;
1031 pkt_dev->delay = NSEC_PER_SEC/value;
1032 if (debug)
1033 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1034
1035 sprintf(pg_result, "OK: rate=%lu", value);
1036 return count;
1037 }
1038 if (!strcmp(name, "udp_src_min")) {
1039 len = num_arg(&user_buffer[i], 10, &value);
1040 if (len < 0)
1041 return len;
1042
1043 i += len;
1044 if (value != pkt_dev->udp_src_min) {
1045 pkt_dev->udp_src_min = value;
1046 pkt_dev->cur_udp_src = value;
1047 }
1048 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1049 return count;
1050 }
1051 if (!strcmp(name, "udp_dst_min")) {
1052 len = num_arg(&user_buffer[i], 10, &value);
1053 if (len < 0)
1054 return len;
1055
1056 i += len;
1057 if (value != pkt_dev->udp_dst_min) {
1058 pkt_dev->udp_dst_min = value;
1059 pkt_dev->cur_udp_dst = value;
1060 }
1061 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1062 return count;
1063 }
1064 if (!strcmp(name, "udp_src_max")) {
1065 len = num_arg(&user_buffer[i], 10, &value);
1066 if (len < 0)
1067 return len;
1068
1069 i += len;
1070 if (value != pkt_dev->udp_src_max) {
1071 pkt_dev->udp_src_max = value;
1072 pkt_dev->cur_udp_src = value;
1073 }
1074 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1075 return count;
1076 }
1077 if (!strcmp(name, "udp_dst_max")) {
1078 len = num_arg(&user_buffer[i], 10, &value);
1079 if (len < 0)
1080 return len;
1081
1082 i += len;
1083 if (value != pkt_dev->udp_dst_max) {
1084 pkt_dev->udp_dst_max = value;
1085 pkt_dev->cur_udp_dst = value;
1086 }
1087 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1088 return count;
1089 }
1090 if (!strcmp(name, "clone_skb")) {
1091 len = num_arg(&user_buffer[i], 10, &value);
1092 if (len < 0)
1093 return len;
1094 if ((value > 0) &&
1095 ((pkt_dev->xmit_mode == M_NETIF_RECEIVE) ||
1096 !(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1097 return -ENOTSUPP;
1098 i += len;
1099 pkt_dev->clone_skb = value;
1100
1101 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1102 return count;
1103 }
1104 if (!strcmp(name, "count")) {
1105 len = num_arg(&user_buffer[i], 10, &value);
1106 if (len < 0)
1107 return len;
1108
1109 i += len;
1110 pkt_dev->count = value;
1111 sprintf(pg_result, "OK: count=%llu",
1112 (unsigned long long)pkt_dev->count);
1113 return count;
1114 }
1115 if (!strcmp(name, "src_mac_count")) {
1116 len = num_arg(&user_buffer[i], 10, &value);
1117 if (len < 0)
1118 return len;
1119
1120 i += len;
1121 if (pkt_dev->src_mac_count != value) {
1122 pkt_dev->src_mac_count = value;
1123 pkt_dev->cur_src_mac_offset = 0;
1124 }
1125 sprintf(pg_result, "OK: src_mac_count=%d",
1126 pkt_dev->src_mac_count);
1127 return count;
1128 }
1129 if (!strcmp(name, "dst_mac_count")) {
1130 len = num_arg(&user_buffer[i], 10, &value);
1131 if (len < 0)
1132 return len;
1133
1134 i += len;
1135 if (pkt_dev->dst_mac_count != value) {
1136 pkt_dev->dst_mac_count = value;
1137 pkt_dev->cur_dst_mac_offset = 0;
1138 }
1139 sprintf(pg_result, "OK: dst_mac_count=%d",
1140 pkt_dev->dst_mac_count);
1141 return count;
1142 }
1143 if (!strcmp(name, "burst")) {
1144 len = num_arg(&user_buffer[i], 10, &value);
1145 if (len < 0)
1146 return len;
1147
1148 i += len;
1149 if ((value > 1) &&
1150 ((pkt_dev->xmit_mode == M_QUEUE_XMIT) ||
1151 ((pkt_dev->xmit_mode == M_START_XMIT) &&
1152 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))))
1153 return -ENOTSUPP;
1154 pkt_dev->burst = value < 1 ? 1 : value;
1155 sprintf(pg_result, "OK: burst=%d", pkt_dev->burst);
1156 return count;
1157 }
1158 if (!strcmp(name, "node")) {
1159 len = num_arg(&user_buffer[i], 10, &value);
1160 if (len < 0)
1161 return len;
1162
1163 i += len;
1164
1165 if (node_possible(value)) {
1166 pkt_dev->node = value;
1167 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1168 if (pkt_dev->page) {
1169 put_page(pkt_dev->page);
1170 pkt_dev->page = NULL;
1171 }
1172 }
1173 else
1174 sprintf(pg_result, "ERROR: node not possible");
1175 return count;
1176 }
1177 if (!strcmp(name, "xmit_mode")) {
1178 char f[32];
1179
1180 memset(f, 0, 32);
1181 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1182 if (len < 0)
1183 return len;
1184
1185 if (copy_from_user(f, &user_buffer[i], len))
1186 return -EFAULT;
1187 i += len;
1188
1189 if (strcmp(f, "start_xmit") == 0) {
1190 pkt_dev->xmit_mode = M_START_XMIT;
1191 } else if (strcmp(f, "netif_receive") == 0) {
1192 /* clone_skb set earlier, not supported in this mode */
1193 if (pkt_dev->clone_skb > 0)
1194 return -ENOTSUPP;
1195
1196 pkt_dev->xmit_mode = M_NETIF_RECEIVE;
1197
1198 /* make sure new packet is allocated every time
1199 * pktgen_xmit() is called
1200 */
1201 pkt_dev->last_ok = 1;
1202
1203 /* override clone_skb if user passed default value
1204 * at module loading time
1205 */
1206 pkt_dev->clone_skb = 0;
1207 } else if (strcmp(f, "queue_xmit") == 0) {
1208 pkt_dev->xmit_mode = M_QUEUE_XMIT;
1209 pkt_dev->last_ok = 1;
1210 } else {
1211 sprintf(pg_result,
1212 "xmit_mode -:%s:- unknown\nAvailable modes: %s",
1213 f, "start_xmit, netif_receive\n");
1214 return count;
1215 }
1216 sprintf(pg_result, "OK: xmit_mode=%s", f);
1217 return count;
1218 }
1219 if (!strcmp(name, "flag")) {
1220 __u32 flag;
1221 char f[32];
1222 bool disable = false;
1223
1224 memset(f, 0, 32);
1225 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1226 if (len < 0)
1227 return len;
1228
1229 if (copy_from_user(f, &user_buffer[i], len))
1230 return -EFAULT;
1231 i += len;
1232
1233 flag = pktgen_read_flag(f, &disable);
1234
1235 if (flag) {
1236 if (disable)
1237 pkt_dev->flags &= ~flag;
1238 else
1239 pkt_dev->flags |= flag;
1240 } else {
1241 sprintf(pg_result,
1242 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1243 f,
1244 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1245 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, "
1246 "MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, "
1247 "QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, "
1248 "NO_TIMESTAMP, "
1249 #ifdef CONFIG_XFRM
1250 "IPSEC, "
1251 #endif
1252 "NODE_ALLOC\n");
1253 return count;
1254 }
1255 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1256 return count;
1257 }
1258 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1259 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1260 if (len < 0)
1261 return len;
1262
1263 if (copy_from_user(buf, &user_buffer[i], len))
1264 return -EFAULT;
1265 buf[len] = 0;
1266 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1267 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1268 strcpy(pkt_dev->dst_min, buf);
1269 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1270 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1271 }
1272 if (debug)
1273 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
1274 i += len;
1275 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1276 return count;
1277 }
1278 if (!strcmp(name, "dst_max")) {
1279 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1280 if (len < 0)
1281 return len;
1282
1283 if (copy_from_user(buf, &user_buffer[i], len))
1284 return -EFAULT;
1285 buf[len] = 0;
1286 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1287 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1288 strcpy(pkt_dev->dst_max, buf);
1289 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1290 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1291 }
1292 if (debug)
1293 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
1294 i += len;
1295 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1296 return count;
1297 }
1298 if (!strcmp(name, "dst6")) {
1299 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1300 if (len < 0)
1301 return len;
1302
1303 pkt_dev->flags |= F_IPV6;
1304
1305 if (copy_from_user(buf, &user_buffer[i], len))
1306 return -EFAULT;
1307 buf[len] = 0;
1308
1309 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
1310 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1311
1312 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1313
1314 if (debug)
1315 pr_debug("dst6 set to: %s\n", buf);
1316
1317 i += len;
1318 sprintf(pg_result, "OK: dst6=%s", buf);
1319 return count;
1320 }
1321 if (!strcmp(name, "dst6_min")) {
1322 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1323 if (len < 0)
1324 return len;
1325
1326 pkt_dev->flags |= F_IPV6;
1327
1328 if (copy_from_user(buf, &user_buffer[i], len))
1329 return -EFAULT;
1330 buf[len] = 0;
1331
1332 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
1333 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1334
1335 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
1336 if (debug)
1337 pr_debug("dst6_min set to: %s\n", buf);
1338
1339 i += len;
1340 sprintf(pg_result, "OK: dst6_min=%s", buf);
1341 return count;
1342 }
1343 if (!strcmp(name, "dst6_max")) {
1344 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1345 if (len < 0)
1346 return len;
1347
1348 pkt_dev->flags |= F_IPV6;
1349
1350 if (copy_from_user(buf, &user_buffer[i], len))
1351 return -EFAULT;
1352 buf[len] = 0;
1353
1354 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
1355 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1356
1357 if (debug)
1358 pr_debug("dst6_max set to: %s\n", buf);
1359
1360 i += len;
1361 sprintf(pg_result, "OK: dst6_max=%s", buf);
1362 return count;
1363 }
1364 if (!strcmp(name, "src6")) {
1365 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1366 if (len < 0)
1367 return len;
1368
1369 pkt_dev->flags |= F_IPV6;
1370
1371 if (copy_from_user(buf, &user_buffer[i], len))
1372 return -EFAULT;
1373 buf[len] = 0;
1374
1375 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
1376 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1377
1378 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1379
1380 if (debug)
1381 pr_debug("src6 set to: %s\n", buf);
1382
1383 i += len;
1384 sprintf(pg_result, "OK: src6=%s", buf);
1385 return count;
1386 }
1387 if (!strcmp(name, "src_min")) {
1388 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1389 if (len < 0)
1390 return len;
1391
1392 if (copy_from_user(buf, &user_buffer[i], len))
1393 return -EFAULT;
1394 buf[len] = 0;
1395 if (strcmp(buf, pkt_dev->src_min) != 0) {
1396 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1397 strcpy(pkt_dev->src_min, buf);
1398 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1399 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1400 }
1401 if (debug)
1402 pr_debug("src_min set to: %s\n", pkt_dev->src_min);
1403 i += len;
1404 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1405 return count;
1406 }
1407 if (!strcmp(name, "src_max")) {
1408 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1409 if (len < 0)
1410 return len;
1411
1412 if (copy_from_user(buf, &user_buffer[i], len))
1413 return -EFAULT;
1414 buf[len] = 0;
1415 if (strcmp(buf, pkt_dev->src_max) != 0) {
1416 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1417 strcpy(pkt_dev->src_max, buf);
1418 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1419 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1420 }
1421 if (debug)
1422 pr_debug("src_max set to: %s\n", pkt_dev->src_max);
1423 i += len;
1424 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1425 return count;
1426 }
1427 if (!strcmp(name, "dst_mac")) {
1428 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1429 if (len < 0)
1430 return len;
1431
1432 memset(valstr, 0, sizeof(valstr));
1433 if (copy_from_user(valstr, &user_buffer[i], len))
1434 return -EFAULT;
1435
1436 if (!mac_pton(valstr, pkt_dev->dst_mac))
1437 return -EINVAL;
1438 /* Set up Dest MAC */
1439 ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac);
1440
1441 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1442 return count;
1443 }
1444 if (!strcmp(name, "src_mac")) {
1445 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1446 if (len < 0)
1447 return len;
1448
1449 memset(valstr, 0, sizeof(valstr));
1450 if (copy_from_user(valstr, &user_buffer[i], len))
1451 return -EFAULT;
1452
1453 if (!mac_pton(valstr, pkt_dev->src_mac))
1454 return -EINVAL;
1455 /* Set up Src MAC */
1456 ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac);
1457
1458 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1459 return count;
1460 }
1461
1462 if (!strcmp(name, "clear_counters")) {
1463 pktgen_clear_counters(pkt_dev);
1464 sprintf(pg_result, "OK: Clearing counters.\n");
1465 return count;
1466 }
1467
1468 if (!strcmp(name, "flows")) {
1469 len = num_arg(&user_buffer[i], 10, &value);
1470 if (len < 0)
1471 return len;
1472
1473 i += len;
1474 if (value > MAX_CFLOWS)
1475 value = MAX_CFLOWS;
1476
1477 pkt_dev->cflows = value;
1478 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1479 return count;
1480 }
1481 #ifdef CONFIG_XFRM
1482 if (!strcmp(name, "spi")) {
1483 len = num_arg(&user_buffer[i], 10, &value);
1484 if (len < 0)
1485 return len;
1486
1487 i += len;
1488 pkt_dev->spi = value;
1489 sprintf(pg_result, "OK: spi=%u", pkt_dev->spi);
1490 return count;
1491 }
1492 #endif
1493 if (!strcmp(name, "flowlen")) {
1494 len = num_arg(&user_buffer[i], 10, &value);
1495 if (len < 0)
1496 return len;
1497
1498 i += len;
1499 pkt_dev->lflow = value;
1500 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1501 return count;
1502 }
1503
1504 if (!strcmp(name, "queue_map_min")) {
1505 len = num_arg(&user_buffer[i], 5, &value);
1506 if (len < 0)
1507 return len;
1508
1509 i += len;
1510 pkt_dev->queue_map_min = value;
1511 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1512 return count;
1513 }
1514
1515 if (!strcmp(name, "queue_map_max")) {
1516 len = num_arg(&user_buffer[i], 5, &value);
1517 if (len < 0)
1518 return len;
1519
1520 i += len;
1521 pkt_dev->queue_map_max = value;
1522 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1523 return count;
1524 }
1525
1526 if (!strcmp(name, "mpls")) {
1527 unsigned int n, cnt;
1528
1529 len = get_labels(&user_buffer[i], pkt_dev);
1530 if (len < 0)
1531 return len;
1532 i += len;
1533 cnt = sprintf(pg_result, "OK: mpls=");
1534 for (n = 0; n < pkt_dev->nr_labels; n++)
1535 cnt += sprintf(pg_result + cnt,
1536 "%08x%s", ntohl(pkt_dev->labels[n]),
1537 n == pkt_dev->nr_labels-1 ? "" : ",");
1538
1539 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1540 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1541 pkt_dev->svlan_id = 0xffff;
1542
1543 if (debug)
1544 pr_debug("VLAN/SVLAN auto turned off\n");
1545 }
1546 return count;
1547 }
1548
1549 if (!strcmp(name, "vlan_id")) {
1550 len = num_arg(&user_buffer[i], 4, &value);
1551 if (len < 0)
1552 return len;
1553
1554 i += len;
1555 if (value <= 4095) {
1556 pkt_dev->vlan_id = value; /* turn on VLAN */
1557
1558 if (debug)
1559 pr_debug("VLAN turned on\n");
1560
1561 if (debug && pkt_dev->nr_labels)
1562 pr_debug("MPLS auto turned off\n");
1563
1564 pkt_dev->nr_labels = 0; /* turn off MPLS */
1565 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1566 } else {
1567 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1568 pkt_dev->svlan_id = 0xffff;
1569
1570 if (debug)
1571 pr_debug("VLAN/SVLAN turned off\n");
1572 }
1573 return count;
1574 }
1575
1576 if (!strcmp(name, "vlan_p")) {
1577 len = num_arg(&user_buffer[i], 1, &value);
1578 if (len < 0)
1579 return len;
1580
1581 i += len;
1582 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1583 pkt_dev->vlan_p = value;
1584 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1585 } else {
1586 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1587 }
1588 return count;
1589 }
1590
1591 if (!strcmp(name, "vlan_cfi")) {
1592 len = num_arg(&user_buffer[i], 1, &value);
1593 if (len < 0)
1594 return len;
1595
1596 i += len;
1597 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1598 pkt_dev->vlan_cfi = value;
1599 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1600 } else {
1601 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1602 }
1603 return count;
1604 }
1605
1606 if (!strcmp(name, "svlan_id")) {
1607 len = num_arg(&user_buffer[i], 4, &value);
1608 if (len < 0)
1609 return len;
1610
1611 i += len;
1612 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1613 pkt_dev->svlan_id = value; /* turn on SVLAN */
1614
1615 if (debug)
1616 pr_debug("SVLAN turned on\n");
1617
1618 if (debug && pkt_dev->nr_labels)
1619 pr_debug("MPLS auto turned off\n");
1620
1621 pkt_dev->nr_labels = 0; /* turn off MPLS */
1622 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1623 } else {
1624 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1625 pkt_dev->svlan_id = 0xffff;
1626
1627 if (debug)
1628 pr_debug("VLAN/SVLAN turned off\n");
1629 }
1630 return count;
1631 }
1632
1633 if (!strcmp(name, "svlan_p")) {
1634 len = num_arg(&user_buffer[i], 1, &value);
1635 if (len < 0)
1636 return len;
1637
1638 i += len;
1639 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1640 pkt_dev->svlan_p = value;
1641 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1642 } else {
1643 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1644 }
1645 return count;
1646 }
1647
1648 if (!strcmp(name, "svlan_cfi")) {
1649 len = num_arg(&user_buffer[i], 1, &value);
1650 if (len < 0)
1651 return len;
1652
1653 i += len;
1654 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1655 pkt_dev->svlan_cfi = value;
1656 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1657 } else {
1658 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1659 }
1660 return count;
1661 }
1662
1663 if (!strcmp(name, "tos")) {
1664 __u32 tmp_value = 0;
1665 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1666 if (len < 0)
1667 return len;
1668
1669 i += len;
1670 if (len == 2) {
1671 pkt_dev->tos = tmp_value;
1672 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1673 } else {
1674 sprintf(pg_result, "ERROR: tos must be 00-ff");
1675 }
1676 return count;
1677 }
1678
1679 if (!strcmp(name, "traffic_class")) {
1680 __u32 tmp_value = 0;
1681 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1682 if (len < 0)
1683 return len;
1684
1685 i += len;
1686 if (len == 2) {
1687 pkt_dev->traffic_class = tmp_value;
1688 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1689 } else {
1690 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1691 }
1692 return count;
1693 }
1694
1695 if (!strcmp(name, "skb_priority")) {
1696 len = num_arg(&user_buffer[i], 9, &value);
1697 if (len < 0)
1698 return len;
1699
1700 i += len;
1701 pkt_dev->skb_priority = value;
1702 sprintf(pg_result, "OK: skb_priority=%i",
1703 pkt_dev->skb_priority);
1704 return count;
1705 }
1706
1707 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1708 return -EINVAL;
1709 }
1710
1711 static int pktgen_if_open(struct inode *inode, struct file *file)
1712 {
1713 return single_open(file, pktgen_if_show, PDE_DATA(inode));
1714 }
1715
1716 static const struct file_operations pktgen_if_fops = {
1717 .open = pktgen_if_open,
1718 .read = seq_read,
1719 .llseek = seq_lseek,
1720 .write = pktgen_if_write,
1721 .release = single_release,
1722 };
1723
1724 static int pktgen_thread_show(struct seq_file *seq, void *v)
1725 {
1726 struct pktgen_thread *t = seq->private;
1727 const struct pktgen_dev *pkt_dev;
1728
1729 BUG_ON(!t);
1730
1731 seq_puts(seq, "Running: ");
1732
1733 rcu_read_lock();
1734 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1735 if (pkt_dev->running)
1736 seq_printf(seq, "%s ", pkt_dev->odevname);
1737
1738 seq_puts(seq, "\nStopped: ");
1739
1740 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1741 if (!pkt_dev->running)
1742 seq_printf(seq, "%s ", pkt_dev->odevname);
1743
1744 if (t->result[0])
1745 seq_printf(seq, "\nResult: %s\n", t->result);
1746 else
1747 seq_puts(seq, "\nResult: NA\n");
1748
1749 rcu_read_unlock();
1750
1751 return 0;
1752 }
1753
1754 static ssize_t pktgen_thread_write(struct file *file,
1755 const char __user * user_buffer,
1756 size_t count, loff_t * offset)
1757 {
1758 struct seq_file *seq = file->private_data;
1759 struct pktgen_thread *t = seq->private;
1760 int i, max, len, ret;
1761 char name[40];
1762 char *pg_result;
1763
1764 if (count < 1) {
1765 // sprintf(pg_result, "Wrong command format");
1766 return -EINVAL;
1767 }
1768
1769 max = count;
1770 len = count_trail_chars(user_buffer, max);
1771 if (len < 0)
1772 return len;
1773
1774 i = len;
1775
1776 /* Read variable name */
1777
1778 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1779 if (len < 0)
1780 return len;
1781
1782 memset(name, 0, sizeof(name));
1783 if (copy_from_user(name, &user_buffer[i], len))
1784 return -EFAULT;
1785 i += len;
1786
1787 max = count - i;
1788 len = count_trail_chars(&user_buffer[i], max);
1789 if (len < 0)
1790 return len;
1791
1792 i += len;
1793
1794 if (debug)
1795 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
1796
1797 if (!t) {
1798 pr_err("ERROR: No thread\n");
1799 ret = -EINVAL;
1800 goto out;
1801 }
1802
1803 pg_result = &(t->result[0]);
1804
1805 if (!strcmp(name, "add_device")) {
1806 char f[32];
1807 memset(f, 0, 32);
1808 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1809 if (len < 0) {
1810 ret = len;
1811 goto out;
1812 }
1813 if (copy_from_user(f, &user_buffer[i], len))
1814 return -EFAULT;
1815 i += len;
1816 mutex_lock(&pktgen_thread_lock);
1817 ret = pktgen_add_device(t, f);
1818 mutex_unlock(&pktgen_thread_lock);
1819 if (!ret) {
1820 ret = count;
1821 sprintf(pg_result, "OK: add_device=%s", f);
1822 } else
1823 sprintf(pg_result, "ERROR: can not add device %s", f);
1824 goto out;
1825 }
1826
1827 if (!strcmp(name, "rem_device_all")) {
1828 mutex_lock(&pktgen_thread_lock);
1829 t->control |= T_REMDEVALL;
1830 mutex_unlock(&pktgen_thread_lock);
1831 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1832 ret = count;
1833 sprintf(pg_result, "OK: rem_device_all");
1834 goto out;
1835 }
1836
1837 if (!strcmp(name, "max_before_softirq")) {
1838 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1839 ret = count;
1840 goto out;
1841 }
1842
1843 ret = -EINVAL;
1844 out:
1845 return ret;
1846 }
1847
1848 static int pktgen_thread_open(struct inode *inode, struct file *file)
1849 {
1850 return single_open(file, pktgen_thread_show, PDE_DATA(inode));
1851 }
1852
1853 static const struct file_operations pktgen_thread_fops = {
1854 .open = pktgen_thread_open,
1855 .read = seq_read,
1856 .llseek = seq_lseek,
1857 .write = pktgen_thread_write,
1858 .release = single_release,
1859 };
1860
1861 /* Think find or remove for NN */
1862 static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn,
1863 const char *ifname, int remove)
1864 {
1865 struct pktgen_thread *t;
1866 struct pktgen_dev *pkt_dev = NULL;
1867 bool exact = (remove == FIND);
1868
1869 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1870 pkt_dev = pktgen_find_dev(t, ifname, exact);
1871 if (pkt_dev) {
1872 if (remove) {
1873 pkt_dev->removal_mark = 1;
1874 t->control |= T_REMDEV;
1875 }
1876 break;
1877 }
1878 }
1879 return pkt_dev;
1880 }
1881
1882 /*
1883 * mark a device for removal
1884 */
1885 static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname)
1886 {
1887 struct pktgen_dev *pkt_dev = NULL;
1888 const int max_tries = 10, msec_per_try = 125;
1889 int i = 0;
1890
1891 mutex_lock(&pktgen_thread_lock);
1892 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1893
1894 while (1) {
1895
1896 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE);
1897 if (pkt_dev == NULL)
1898 break; /* success */
1899
1900 mutex_unlock(&pktgen_thread_lock);
1901 pr_debug("%s: waiting for %s to disappear....\n",
1902 __func__, ifname);
1903 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1904 mutex_lock(&pktgen_thread_lock);
1905
1906 if (++i >= max_tries) {
1907 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1908 __func__, msec_per_try * i, ifname);
1909 break;
1910 }
1911
1912 }
1913
1914 mutex_unlock(&pktgen_thread_lock);
1915 }
1916
1917 static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev)
1918 {
1919 struct pktgen_thread *t;
1920
1921 mutex_lock(&pktgen_thread_lock);
1922
1923 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1924 struct pktgen_dev *pkt_dev;
1925
1926 if_lock(t);
1927 list_for_each_entry(pkt_dev, &t->if_list, list) {
1928 if (pkt_dev->odev != dev)
1929 continue;
1930
1931 proc_remove(pkt_dev->entry);
1932
1933 pkt_dev->entry = proc_create_data(dev->name, 0600,
1934 pn->proc_dir,
1935 &pktgen_if_fops,
1936 pkt_dev);
1937 if (!pkt_dev->entry)
1938 pr_err("can't move proc entry for '%s'\n",
1939 dev->name);
1940 break;
1941 }
1942 if_unlock(t);
1943 }
1944 mutex_unlock(&pktgen_thread_lock);
1945 }
1946
1947 static int pktgen_device_event(struct notifier_block *unused,
1948 unsigned long event, void *ptr)
1949 {
1950 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1951 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id);
1952
1953 if (pn->pktgen_exiting)
1954 return NOTIFY_DONE;
1955
1956 /* It is OK that we do not hold the group lock right now,
1957 * as we run under the RTNL lock.
1958 */
1959
1960 switch (event) {
1961 case NETDEV_CHANGENAME:
1962 pktgen_change_name(pn, dev);
1963 break;
1964
1965 case NETDEV_UNREGISTER:
1966 pktgen_mark_device(pn, dev->name);
1967 break;
1968 }
1969
1970 return NOTIFY_DONE;
1971 }
1972
1973 static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn,
1974 struct pktgen_dev *pkt_dev,
1975 const char *ifname)
1976 {
1977 char b[IFNAMSIZ+5];
1978 int i;
1979
1980 for (i = 0; ifname[i] != '@'; i++) {
1981 if (i == IFNAMSIZ)
1982 break;
1983
1984 b[i] = ifname[i];
1985 }
1986 b[i] = 0;
1987
1988 return dev_get_by_name(pn->net, b);
1989 }
1990
1991
1992 /* Associate pktgen_dev with a device. */
1993
1994 static int pktgen_setup_dev(const struct pktgen_net *pn,
1995 struct pktgen_dev *pkt_dev, const char *ifname)
1996 {
1997 struct net_device *odev;
1998 int err;
1999
2000 /* Clean old setups */
2001 if (pkt_dev->odev) {
2002 dev_put(pkt_dev->odev);
2003 pkt_dev->odev = NULL;
2004 }
2005
2006 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname);
2007 if (!odev) {
2008 pr_err("no such netdevice: \"%s\"\n", ifname);
2009 return -ENODEV;
2010 }
2011
2012 if (odev->type != ARPHRD_ETHER) {
2013 pr_err("not an ethernet device: \"%s\"\n", ifname);
2014 err = -EINVAL;
2015 } else if (!netif_running(odev)) {
2016 pr_err("device is down: \"%s\"\n", ifname);
2017 err = -ENETDOWN;
2018 } else {
2019 pkt_dev->odev = odev;
2020 return 0;
2021 }
2022
2023 dev_put(odev);
2024 return err;
2025 }
2026
2027 /* Read pkt_dev from the interface and set up internal pktgen_dev
2028 * structure to have the right information to create/send packets
2029 */
2030 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2031 {
2032 int ntxq;
2033
2034 if (!pkt_dev->odev) {
2035 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2036 sprintf(pkt_dev->result,
2037 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2038 return;
2039 }
2040
2041 /* make sure that we don't pick a non-existing transmit queue */
2042 ntxq = pkt_dev->odev->real_num_tx_queues;
2043
2044 if (ntxq <= pkt_dev->queue_map_min) {
2045 pr_warn("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2046 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2047 pkt_dev->odevname);
2048 pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2049 }
2050 if (pkt_dev->queue_map_max >= ntxq) {
2051 pr_warn("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2052 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2053 pkt_dev->odevname);
2054 pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2055 }
2056
2057 /* Default to the interface's mac if not explicitly set. */
2058
2059 if (is_zero_ether_addr(pkt_dev->src_mac))
2060 ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr);
2061
2062 /* Set up Dest MAC */
2063 ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac);
2064
2065 if (pkt_dev->flags & F_IPV6) {
2066 int i, set = 0, err = 1;
2067 struct inet6_dev *idev;
2068
2069 if (pkt_dev->min_pkt_size == 0) {
2070 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
2071 + sizeof(struct udphdr)
2072 + sizeof(struct pktgen_hdr)
2073 + pkt_dev->pkt_overhead;
2074 }
2075
2076 for (i = 0; i < sizeof(struct in6_addr); i++)
2077 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2078 set = 1;
2079 break;
2080 }
2081
2082 if (!set) {
2083
2084 /*
2085 * Use linklevel address if unconfigured.
2086 *
2087 * use ipv6_get_lladdr if/when it's get exported
2088 */
2089
2090 rcu_read_lock();
2091 idev = __in6_dev_get(pkt_dev->odev);
2092 if (idev) {
2093 struct inet6_ifaddr *ifp;
2094
2095 read_lock_bh(&idev->lock);
2096 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2097 if ((ifp->scope & IFA_LINK) &&
2098 !(ifp->flags & IFA_F_TENTATIVE)) {
2099 pkt_dev->cur_in6_saddr = ifp->addr;
2100 err = 0;
2101 break;
2102 }
2103 }
2104 read_unlock_bh(&idev->lock);
2105 }
2106 rcu_read_unlock();
2107 if (err)
2108 pr_err("ERROR: IPv6 link address not available\n");
2109 }
2110 } else {
2111 if (pkt_dev->min_pkt_size == 0) {
2112 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
2113 + sizeof(struct udphdr)
2114 + sizeof(struct pktgen_hdr)
2115 + pkt_dev->pkt_overhead;
2116 }
2117
2118 pkt_dev->saddr_min = 0;
2119 pkt_dev->saddr_max = 0;
2120 if (strlen(pkt_dev->src_min) == 0) {
2121
2122 struct in_device *in_dev;
2123
2124 rcu_read_lock();
2125 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2126 if (in_dev) {
2127 if (in_dev->ifa_list) {
2128 pkt_dev->saddr_min =
2129 in_dev->ifa_list->ifa_address;
2130 pkt_dev->saddr_max = pkt_dev->saddr_min;
2131 }
2132 }
2133 rcu_read_unlock();
2134 } else {
2135 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2136 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2137 }
2138
2139 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2140 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2141 }
2142 /* Initialize current values. */
2143 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2144 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
2145 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
2146
2147 pkt_dev->cur_dst_mac_offset = 0;
2148 pkt_dev->cur_src_mac_offset = 0;
2149 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2150 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2151 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2152 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2153 pkt_dev->nflows = 0;
2154 }
2155
2156
2157 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2158 {
2159 ktime_t start_time, end_time;
2160 s64 remaining;
2161 struct hrtimer_sleeper t;
2162
2163 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2164 hrtimer_set_expires(&t.timer, spin_until);
2165
2166 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2167 if (remaining <= 0)
2168 goto out;
2169
2170 start_time = ktime_get();
2171 if (remaining < 100000) {
2172 /* for small delays (<100us), just loop until limit is reached */
2173 do {
2174 end_time = ktime_get();
2175 } while (ktime_compare(end_time, spin_until) < 0);
2176 } else {
2177 /* see do_nanosleep */
2178 hrtimer_init_sleeper(&t, current);
2179 do {
2180 set_current_state(TASK_INTERRUPTIBLE);
2181 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2182
2183 if (likely(t.task))
2184 schedule();
2185
2186 hrtimer_cancel(&t.timer);
2187 } while (t.task && pkt_dev->running && !signal_pending(current));
2188 __set_current_state(TASK_RUNNING);
2189 end_time = ktime_get();
2190 }
2191
2192 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2193 out:
2194 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2195 destroy_hrtimer_on_stack(&t.timer);
2196 }
2197
2198 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2199 {
2200 pkt_dev->pkt_overhead = 0;
2201 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2202 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2203 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2204 }
2205
2206 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2207 {
2208 return !!(pkt_dev->flows[flow].flags & F_INIT);
2209 }
2210
2211 static inline int f_pick(struct pktgen_dev *pkt_dev)
2212 {
2213 int flow = pkt_dev->curfl;
2214
2215 if (pkt_dev->flags & F_FLOW_SEQ) {
2216 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2217 /* reset time */
2218 pkt_dev->flows[flow].count = 0;
2219 pkt_dev->flows[flow].flags = 0;
2220 pkt_dev->curfl += 1;
2221 if (pkt_dev->curfl >= pkt_dev->cflows)
2222 pkt_dev->curfl = 0; /*reset */
2223 }
2224 } else {
2225 flow = prandom_u32() % pkt_dev->cflows;
2226 pkt_dev->curfl = flow;
2227
2228 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2229 pkt_dev->flows[flow].count = 0;
2230 pkt_dev->flows[flow].flags = 0;
2231 }
2232 }
2233
2234 return pkt_dev->curfl;
2235 }
2236
2237
2238 #ifdef CONFIG_XFRM
2239 /* If there was already an IPSEC SA, we keep it as is, else
2240 * we go look for it ...
2241 */
2242 #define DUMMY_MARK 0
2243 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2244 {
2245 struct xfrm_state *x = pkt_dev->flows[flow].x;
2246 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
2247 if (!x) {
2248
2249 if (pkt_dev->spi) {
2250 /* We need as quick as possible to find the right SA
2251 * Searching with minimum criteria to archieve this.
2252 */
2253 x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET);
2254 } else {
2255 /* slow path: we dont already have xfrm_state */
2256 x = xfrm_stateonly_find(pn->net, DUMMY_MARK, 0,
2257 (xfrm_address_t *)&pkt_dev->cur_daddr,
2258 (xfrm_address_t *)&pkt_dev->cur_saddr,
2259 AF_INET,
2260 pkt_dev->ipsmode,
2261 pkt_dev->ipsproto, 0);
2262 }
2263 if (x) {
2264 pkt_dev->flows[flow].x = x;
2265 set_pkt_overhead(pkt_dev);
2266 pkt_dev->pkt_overhead += x->props.header_len;
2267 }
2268
2269 }
2270 }
2271 #endif
2272 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2273 {
2274
2275 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2276 pkt_dev->cur_queue_map = smp_processor_id();
2277
2278 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2279 __u16 t;
2280 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2281 t = prandom_u32() %
2282 (pkt_dev->queue_map_max -
2283 pkt_dev->queue_map_min + 1)
2284 + pkt_dev->queue_map_min;
2285 } else {
2286 t = pkt_dev->cur_queue_map + 1;
2287 if (t > pkt_dev->queue_map_max)
2288 t = pkt_dev->queue_map_min;
2289 }
2290 pkt_dev->cur_queue_map = t;
2291 }
2292 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2293 }
2294
2295 /* Increment/randomize headers according to flags and current values
2296 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2297 */
2298 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2299 {
2300 __u32 imn;
2301 __u32 imx;
2302 int flow = 0;
2303
2304 if (pkt_dev->cflows)
2305 flow = f_pick(pkt_dev);
2306
2307 /* Deal with source MAC */
2308 if (pkt_dev->src_mac_count > 1) {
2309 __u32 mc;
2310 __u32 tmp;
2311
2312 if (pkt_dev->flags & F_MACSRC_RND)
2313 mc = prandom_u32() % pkt_dev->src_mac_count;
2314 else {
2315 mc = pkt_dev->cur_src_mac_offset++;
2316 if (pkt_dev->cur_src_mac_offset >=
2317 pkt_dev->src_mac_count)
2318 pkt_dev->cur_src_mac_offset = 0;
2319 }
2320
2321 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2322 pkt_dev->hh[11] = tmp;
2323 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2324 pkt_dev->hh[10] = tmp;
2325 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2326 pkt_dev->hh[9] = tmp;
2327 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2328 pkt_dev->hh[8] = tmp;
2329 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2330 pkt_dev->hh[7] = tmp;
2331 }
2332
2333 /* Deal with Destination MAC */
2334 if (pkt_dev->dst_mac_count > 1) {
2335 __u32 mc;
2336 __u32 tmp;
2337
2338 if (pkt_dev->flags & F_MACDST_RND)
2339 mc = prandom_u32() % pkt_dev->dst_mac_count;
2340
2341 else {
2342 mc = pkt_dev->cur_dst_mac_offset++;
2343 if (pkt_dev->cur_dst_mac_offset >=
2344 pkt_dev->dst_mac_count) {
2345 pkt_dev->cur_dst_mac_offset = 0;
2346 }
2347 }
2348
2349 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2350 pkt_dev->hh[5] = tmp;
2351 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2352 pkt_dev->hh[4] = tmp;
2353 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2354 pkt_dev->hh[3] = tmp;
2355 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2356 pkt_dev->hh[2] = tmp;
2357 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2358 pkt_dev->hh[1] = tmp;
2359 }
2360
2361 if (pkt_dev->flags & F_MPLS_RND) {
2362 unsigned int i;
2363 for (i = 0; i < pkt_dev->nr_labels; i++)
2364 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2365 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2366 ((__force __be32)prandom_u32() &
2367 htonl(0x000fffff));
2368 }
2369
2370 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2371 pkt_dev->vlan_id = prandom_u32() & (4096 - 1);
2372 }
2373
2374 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2375 pkt_dev->svlan_id = prandom_u32() & (4096 - 1);
2376 }
2377
2378 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2379 if (pkt_dev->flags & F_UDPSRC_RND)
2380 pkt_dev->cur_udp_src = prandom_u32() %
2381 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2382 + pkt_dev->udp_src_min;
2383
2384 else {
2385 pkt_dev->cur_udp_src++;
2386 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2387 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2388 }
2389 }
2390
2391 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2392 if (pkt_dev->flags & F_UDPDST_RND) {
2393 pkt_dev->cur_udp_dst = prandom_u32() %
2394 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2395 + pkt_dev->udp_dst_min;
2396 } else {
2397 pkt_dev->cur_udp_dst++;
2398 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2399 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2400 }
2401 }
2402
2403 if (!(pkt_dev->flags & F_IPV6)) {
2404
2405 imn = ntohl(pkt_dev->saddr_min);
2406 imx = ntohl(pkt_dev->saddr_max);
2407 if (imn < imx) {
2408 __u32 t;
2409 if (pkt_dev->flags & F_IPSRC_RND)
2410 t = prandom_u32() % (imx - imn) + imn;
2411 else {
2412 t = ntohl(pkt_dev->cur_saddr);
2413 t++;
2414 if (t > imx)
2415 t = imn;
2416
2417 }
2418 pkt_dev->cur_saddr = htonl(t);
2419 }
2420
2421 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2422 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2423 } else {
2424 imn = ntohl(pkt_dev->daddr_min);
2425 imx = ntohl(pkt_dev->daddr_max);
2426 if (imn < imx) {
2427 __u32 t;
2428 __be32 s;
2429 if (pkt_dev->flags & F_IPDST_RND) {
2430
2431 do {
2432 t = prandom_u32() %
2433 (imx - imn) + imn;
2434 s = htonl(t);
2435 } while (ipv4_is_loopback(s) ||
2436 ipv4_is_multicast(s) ||
2437 ipv4_is_lbcast(s) ||
2438 ipv4_is_zeronet(s) ||
2439 ipv4_is_local_multicast(s));
2440 pkt_dev->cur_daddr = s;
2441 } else {
2442 t = ntohl(pkt_dev->cur_daddr);
2443 t++;
2444 if (t > imx) {
2445 t = imn;
2446 }
2447 pkt_dev->cur_daddr = htonl(t);
2448 }
2449 }
2450 if (pkt_dev->cflows) {
2451 pkt_dev->flows[flow].flags |= F_INIT;
2452 pkt_dev->flows[flow].cur_daddr =
2453 pkt_dev->cur_daddr;
2454 #ifdef CONFIG_XFRM
2455 if (pkt_dev->flags & F_IPSEC)
2456 get_ipsec_sa(pkt_dev, flow);
2457 #endif
2458 pkt_dev->nflows++;
2459 }
2460 }
2461 } else { /* IPV6 * */
2462
2463 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
2464 int i;
2465
2466 /* Only random destinations yet */
2467
2468 for (i = 0; i < 4; i++) {
2469 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2470 (((__force __be32)prandom_u32() |
2471 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2472 pkt_dev->max_in6_daddr.s6_addr32[i]);
2473 }
2474 }
2475 }
2476
2477 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2478 __u32 t;
2479 if (pkt_dev->flags & F_TXSIZE_RND) {
2480 t = prandom_u32() %
2481 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2482 + pkt_dev->min_pkt_size;
2483 } else {
2484 t = pkt_dev->cur_pkt_size + 1;
2485 if (t > pkt_dev->max_pkt_size)
2486 t = pkt_dev->min_pkt_size;
2487 }
2488 pkt_dev->cur_pkt_size = t;
2489 }
2490
2491 set_cur_queue_map(pkt_dev);
2492
2493 pkt_dev->flows[flow].count++;
2494 }
2495
2496
2497 #ifdef CONFIG_XFRM
2498 static u32 pktgen_dst_metrics[RTAX_MAX + 1] = {
2499
2500 [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */
2501 };
2502
2503 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2504 {
2505 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2506 int err = 0;
2507 struct net *net = dev_net(pkt_dev->odev);
2508
2509 if (!x)
2510 return 0;
2511 /* XXX: we dont support tunnel mode for now until
2512 * we resolve the dst issue */
2513 if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0))
2514 return 0;
2515
2516 /* But when user specify an valid SPI, transformation
2517 * supports both transport/tunnel mode + ESP/AH type.
2518 */
2519 if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0))
2520 skb->_skb_refdst = (unsigned long)&pkt_dev->xdst.u.dst | SKB_DST_NOREF;
2521
2522 rcu_read_lock_bh();
2523 err = x->outer_mode->output(x, skb);
2524 rcu_read_unlock_bh();
2525 if (err) {
2526 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR);
2527 goto error;
2528 }
2529 err = x->type->output(x, skb);
2530 if (err) {
2531 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR);
2532 goto error;
2533 }
2534 spin_lock_bh(&x->lock);
2535 x->curlft.bytes += skb->len;
2536 x->curlft.packets++;
2537 spin_unlock_bh(&x->lock);
2538 error:
2539 return err;
2540 }
2541
2542 static void free_SAs(struct pktgen_dev *pkt_dev)
2543 {
2544 if (pkt_dev->cflows) {
2545 /* let go of the SAs if we have them */
2546 int i;
2547 for (i = 0; i < pkt_dev->cflows; i++) {
2548 struct xfrm_state *x = pkt_dev->flows[i].x;
2549 if (x) {
2550 xfrm_state_put(x);
2551 pkt_dev->flows[i].x = NULL;
2552 }
2553 }
2554 }
2555 }
2556
2557 static int process_ipsec(struct pktgen_dev *pkt_dev,
2558 struct sk_buff *skb, __be16 protocol)
2559 {
2560 if (pkt_dev->flags & F_IPSEC) {
2561 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2562 int nhead = 0;
2563 if (x) {
2564 struct ethhdr *eth;
2565 struct iphdr *iph;
2566 int ret;
2567
2568 nhead = x->props.header_len - skb_headroom(skb);
2569 if (nhead > 0) {
2570 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2571 if (ret < 0) {
2572 pr_err("Error expanding ipsec packet %d\n",
2573 ret);
2574 goto err;
2575 }
2576 }
2577
2578 /* ipsec is not expecting ll header */
2579 skb_pull(skb, ETH_HLEN);
2580 ret = pktgen_output_ipsec(skb, pkt_dev);
2581 if (ret) {
2582 pr_err("Error creating ipsec packet %d\n", ret);
2583 goto err;
2584 }
2585 /* restore ll */
2586 eth = skb_push(skb, ETH_HLEN);
2587 memcpy(eth, pkt_dev->hh, 2 * ETH_ALEN);
2588 eth->h_proto = protocol;
2589
2590 /* Update IPv4 header len as well as checksum value */
2591 iph = ip_hdr(skb);
2592 iph->tot_len = htons(skb->len - ETH_HLEN);
2593 ip_send_check(iph);
2594 }
2595 }
2596 return 1;
2597 err:
2598 kfree_skb(skb);
2599 return 0;
2600 }
2601 #endif
2602
2603 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2604 {
2605 unsigned int i;
2606 for (i = 0; i < pkt_dev->nr_labels; i++)
2607 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2608
2609 mpls--;
2610 *mpls |= MPLS_STACK_BOTTOM;
2611 }
2612
2613 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2614 unsigned int prio)
2615 {
2616 return htons(id | (cfi << 12) | (prio << 13));
2617 }
2618
2619 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2620 int datalen)
2621 {
2622 struct timespec64 timestamp;
2623 struct pktgen_hdr *pgh;
2624
2625 pgh = skb_put(skb, sizeof(*pgh));
2626 datalen -= sizeof(*pgh);
2627
2628 if (pkt_dev->nfrags <= 0) {
2629 skb_put_zero(skb, datalen);
2630 } else {
2631 int frags = pkt_dev->nfrags;
2632 int i, len;
2633 int frag_len;
2634
2635
2636 if (frags > MAX_SKB_FRAGS)
2637 frags = MAX_SKB_FRAGS;
2638 len = datalen - frags * PAGE_SIZE;
2639 if (len > 0) {
2640 skb_put_zero(skb, len);
2641 datalen = frags * PAGE_SIZE;
2642 }
2643
2644 i = 0;
2645 frag_len = (datalen/frags) < PAGE_SIZE ?
2646 (datalen/frags) : PAGE_SIZE;
2647 while (datalen > 0) {
2648 if (unlikely(!pkt_dev->page)) {
2649 int node = numa_node_id();
2650
2651 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2652 node = pkt_dev->node;
2653 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2654 if (!pkt_dev->page)
2655 break;
2656 }
2657 get_page(pkt_dev->page);
2658 skb_frag_set_page(skb, i, pkt_dev->page);
2659 skb_shinfo(skb)->frags[i].page_offset = 0;
2660 /*last fragment, fill rest of data*/
2661 if (i == (frags - 1))
2662 skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2663 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2664 else
2665 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2666 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2667 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2668 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2669 i++;
2670 skb_shinfo(skb)->nr_frags = i;
2671 }
2672 }
2673
2674 /* Stamp the time, and sequence number,
2675 * convert them to network byte order
2676 */
2677 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2678 pgh->seq_num = htonl(pkt_dev->seq_num);
2679
2680 if (pkt_dev->flags & F_NO_TIMESTAMP) {
2681 pgh->tv_sec = 0;
2682 pgh->tv_usec = 0;
2683 } else {
2684 /*
2685 * pgh->tv_sec wraps in y2106 when interpreted as unsigned
2686 * as done by wireshark, or y2038 when interpreted as signed.
2687 * This is probably harmless, but if anyone wants to improve
2688 * it, we could introduce a variant that puts 64-bit nanoseconds
2689 * into the respective header bytes.
2690 * This would also be slightly faster to read.
2691 */
2692 ktime_get_real_ts64(&timestamp);
2693 pgh->tv_sec = htonl(timestamp.tv_sec);
2694 pgh->tv_usec = htonl(timestamp.tv_nsec / NSEC_PER_USEC);
2695 }
2696 }
2697
2698 static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
2699 struct pktgen_dev *pkt_dev)
2700 {
2701 unsigned int extralen = LL_RESERVED_SPACE(dev);
2702 struct sk_buff *skb = NULL;
2703 unsigned int size;
2704
2705 size = pkt_dev->cur_pkt_size + 64 + extralen + pkt_dev->pkt_overhead;
2706 if (pkt_dev->flags & F_NODE) {
2707 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id();
2708
2709 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node);
2710 if (likely(skb)) {
2711 skb_reserve(skb, NET_SKB_PAD);
2712 skb->dev = dev;
2713 }
2714 } else {
2715 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
2716 }
2717
2718 /* the caller pre-fetches from skb->data and reserves for the mac hdr */
2719 if (likely(skb))
2720 skb_reserve(skb, extralen - 16);
2721
2722 return skb;
2723 }
2724
2725 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2726 struct pktgen_dev *pkt_dev)
2727 {
2728 struct sk_buff *skb = NULL;
2729 __u8 *eth;
2730 struct udphdr *udph;
2731 int datalen, iplen;
2732 struct iphdr *iph;
2733 __be16 protocol = htons(ETH_P_IP);
2734 __be32 *mpls;
2735 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2736 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2737 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2738 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2739 u16 queue_map;
2740
2741 if (pkt_dev->nr_labels)
2742 protocol = htons(ETH_P_MPLS_UC);
2743
2744 if (pkt_dev->vlan_id != 0xffff)
2745 protocol = htons(ETH_P_8021Q);
2746
2747 /* Update any of the values, used when we're incrementing various
2748 * fields.
2749 */
2750 mod_cur_headers(pkt_dev);
2751 queue_map = pkt_dev->cur_queue_map;
2752
2753 skb = pktgen_alloc_skb(odev, pkt_dev);
2754 if (!skb) {
2755 sprintf(pkt_dev->result, "No memory");
2756 return NULL;
2757 }
2758
2759 prefetchw(skb->data);
2760 skb_reserve(skb, 16);
2761
2762 /* Reserve for ethernet and IP header */
2763 eth = skb_push(skb, 14);
2764 mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32));
2765 if (pkt_dev->nr_labels)
2766 mpls_push(mpls, pkt_dev);
2767
2768 if (pkt_dev->vlan_id != 0xffff) {
2769 if (pkt_dev->svlan_id != 0xffff) {
2770 svlan_tci = skb_put(skb, sizeof(__be16));
2771 *svlan_tci = build_tci(pkt_dev->svlan_id,
2772 pkt_dev->svlan_cfi,
2773 pkt_dev->svlan_p);
2774 svlan_encapsulated_proto = skb_put(skb,
2775 sizeof(__be16));
2776 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2777 }
2778 vlan_tci = skb_put(skb, sizeof(__be16));
2779 *vlan_tci = build_tci(pkt_dev->vlan_id,
2780 pkt_dev->vlan_cfi,
2781 pkt_dev->vlan_p);
2782 vlan_encapsulated_proto = skb_put(skb, sizeof(__be16));
2783 *vlan_encapsulated_proto = htons(ETH_P_IP);
2784 }
2785
2786 skb_reset_mac_header(skb);
2787 skb_set_network_header(skb, skb->len);
2788 iph = skb_put(skb, sizeof(struct iphdr));
2789
2790 skb_set_transport_header(skb, skb->len);
2791 udph = skb_put(skb, sizeof(struct udphdr));
2792 skb_set_queue_mapping(skb, queue_map);
2793 skb->priority = pkt_dev->skb_priority;
2794
2795 memcpy(eth, pkt_dev->hh, 12);
2796 *(__be16 *) & eth[12] = protocol;
2797
2798 /* Eth + IPh + UDPh + mpls */
2799 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2800 pkt_dev->pkt_overhead;
2801 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
2802 datalen = sizeof(struct pktgen_hdr);
2803
2804 udph->source = htons(pkt_dev->cur_udp_src);
2805 udph->dest = htons(pkt_dev->cur_udp_dst);
2806 udph->len = htons(datalen + 8); /* DATA + udphdr */
2807 udph->check = 0;
2808
2809 iph->ihl = 5;
2810 iph->version = 4;
2811 iph->ttl = 32;
2812 iph->tos = pkt_dev->tos;
2813 iph->protocol = IPPROTO_UDP; /* UDP */
2814 iph->saddr = pkt_dev->cur_saddr;
2815 iph->daddr = pkt_dev->cur_daddr;
2816 iph->id = htons(pkt_dev->ip_id);
2817 pkt_dev->ip_id++;
2818 iph->frag_off = 0;
2819 iplen = 20 + 8 + datalen;
2820 iph->tot_len = htons(iplen);
2821 ip_send_check(iph);
2822 skb->protocol = protocol;
2823 skb->dev = odev;
2824 skb->pkt_type = PACKET_HOST;
2825
2826 pktgen_finalize_skb(pkt_dev, skb, datalen);
2827
2828 if (!(pkt_dev->flags & F_UDPCSUM)) {
2829 skb->ip_summed = CHECKSUM_NONE;
2830 } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IP_CSUM)) {
2831 skb->ip_summed = CHECKSUM_PARTIAL;
2832 skb->csum = 0;
2833 udp4_hwcsum(skb, iph->saddr, iph->daddr);
2834 } else {
2835 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), datalen + 8, 0);
2836
2837 /* add protocol-dependent pseudo-header */
2838 udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
2839 datalen + 8, IPPROTO_UDP, csum);
2840
2841 if (udph->check == 0)
2842 udph->check = CSUM_MANGLED_0;
2843 }
2844
2845 #ifdef CONFIG_XFRM
2846 if (!process_ipsec(pkt_dev, skb, protocol))
2847 return NULL;
2848 #endif
2849
2850 return skb;
2851 }
2852
2853 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2854 struct pktgen_dev *pkt_dev)
2855 {
2856 struct sk_buff *skb = NULL;
2857 __u8 *eth;
2858 struct udphdr *udph;
2859 int datalen, udplen;
2860 struct ipv6hdr *iph;
2861 __be16 protocol = htons(ETH_P_IPV6);
2862 __be32 *mpls;
2863 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2864 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2865 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2866 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2867 u16 queue_map;
2868
2869 if (pkt_dev->nr_labels)
2870 protocol = htons(ETH_P_MPLS_UC);
2871
2872 if (pkt_dev->vlan_id != 0xffff)
2873 protocol = htons(ETH_P_8021Q);
2874
2875 /* Update any of the values, used when we're incrementing various
2876 * fields.
2877 */
2878 mod_cur_headers(pkt_dev);
2879 queue_map = pkt_dev->cur_queue_map;
2880
2881 skb = pktgen_alloc_skb(odev, pkt_dev);
2882 if (!skb) {
2883 sprintf(pkt_dev->result, "No memory");
2884 return NULL;
2885 }
2886
2887 prefetchw(skb->data);
2888 skb_reserve(skb, 16);
2889
2890 /* Reserve for ethernet and IP header */
2891 eth = skb_push(skb, 14);
2892 mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32));
2893 if (pkt_dev->nr_labels)
2894 mpls_push(mpls, pkt_dev);
2895
2896 if (pkt_dev->vlan_id != 0xffff) {
2897 if (pkt_dev->svlan_id != 0xffff) {
2898 svlan_tci = skb_put(skb, sizeof(__be16));
2899 *svlan_tci = build_tci(pkt_dev->svlan_id,
2900 pkt_dev->svlan_cfi,
2901 pkt_dev->svlan_p);
2902 svlan_encapsulated_proto = skb_put(skb,
2903 sizeof(__be16));
2904 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2905 }
2906 vlan_tci = skb_put(skb, sizeof(__be16));
2907 *vlan_tci = build_tci(pkt_dev->vlan_id,
2908 pkt_dev->vlan_cfi,
2909 pkt_dev->vlan_p);
2910 vlan_encapsulated_proto = skb_put(skb, sizeof(__be16));
2911 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2912 }
2913
2914 skb_reset_mac_header(skb);
2915 skb_set_network_header(skb, skb->len);
2916 iph = skb_put(skb, sizeof(struct ipv6hdr));
2917
2918 skb_set_transport_header(skb, skb->len);
2919 udph = skb_put(skb, sizeof(struct udphdr));
2920 skb_set_queue_mapping(skb, queue_map);
2921 skb->priority = pkt_dev->skb_priority;
2922
2923 memcpy(eth, pkt_dev->hh, 12);
2924 *(__be16 *) &eth[12] = protocol;
2925
2926 /* Eth + IPh + UDPh + mpls */
2927 datalen = pkt_dev->cur_pkt_size - 14 -
2928 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2929 pkt_dev->pkt_overhead;
2930
2931 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
2932 datalen = sizeof(struct pktgen_hdr);
2933 net_info_ratelimited("increased datalen to %d\n", datalen);
2934 }
2935
2936 udplen = datalen + sizeof(struct udphdr);
2937 udph->source = htons(pkt_dev->cur_udp_src);
2938 udph->dest = htons(pkt_dev->cur_udp_dst);
2939 udph->len = htons(udplen);
2940 udph->check = 0;
2941
2942 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2943
2944 if (pkt_dev->traffic_class) {
2945 /* Version + traffic class + flow (0) */
2946 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2947 }
2948
2949 iph->hop_limit = 32;
2950
2951 iph->payload_len = htons(udplen);
2952 iph->nexthdr = IPPROTO_UDP;
2953
2954 iph->daddr = pkt_dev->cur_in6_daddr;
2955 iph->saddr = pkt_dev->cur_in6_saddr;
2956
2957 skb->protocol = protocol;
2958 skb->dev = odev;
2959 skb->pkt_type = PACKET_HOST;
2960
2961 pktgen_finalize_skb(pkt_dev, skb, datalen);
2962
2963 if (!(pkt_dev->flags & F_UDPCSUM)) {
2964 skb->ip_summed = CHECKSUM_NONE;
2965 } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IPV6_CSUM)) {
2966 skb->ip_summed = CHECKSUM_PARTIAL;
2967 skb->csum_start = skb_transport_header(skb) - skb->head;
2968 skb->csum_offset = offsetof(struct udphdr, check);
2969 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0);
2970 } else {
2971 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), udplen, 0);
2972
2973 /* add protocol-dependent pseudo-header */
2974 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum);
2975
2976 if (udph->check == 0)
2977 udph->check = CSUM_MANGLED_0;
2978 }
2979
2980 return skb;
2981 }
2982
2983 static struct sk_buff *fill_packet(struct net_device *odev,
2984 struct pktgen_dev *pkt_dev)
2985 {
2986 if (pkt_dev->flags & F_IPV6)
2987 return fill_packet_ipv6(odev, pkt_dev);
2988 else
2989 return fill_packet_ipv4(odev, pkt_dev);
2990 }
2991
2992 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
2993 {
2994 pkt_dev->seq_num = 1;
2995 pkt_dev->idle_acc = 0;
2996 pkt_dev->sofar = 0;
2997 pkt_dev->tx_bytes = 0;
2998 pkt_dev->errors = 0;
2999 }
3000
3001 /* Set up structure for sending pkts, clear counters */
3002
3003 static void pktgen_run(struct pktgen_thread *t)
3004 {
3005 struct pktgen_dev *pkt_dev;
3006 int started = 0;
3007
3008 func_enter();
3009
3010 rcu_read_lock();
3011 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3012
3013 /*
3014 * setup odev and create initial packet.
3015 */
3016 pktgen_setup_inject(pkt_dev);
3017
3018 if (pkt_dev->odev) {
3019 pktgen_clear_counters(pkt_dev);
3020 pkt_dev->skb = NULL;
3021 pkt_dev->started_at = pkt_dev->next_tx = ktime_get();
3022
3023 set_pkt_overhead(pkt_dev);
3024
3025 strcpy(pkt_dev->result, "Starting");
3026 pkt_dev->running = 1; /* Cranke yeself! */
3027 started++;
3028 } else
3029 strcpy(pkt_dev->result, "Error starting");
3030 }
3031 rcu_read_unlock();
3032 if (started)
3033 t->control &= ~(T_STOP);
3034 }
3035
3036 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn)
3037 {
3038 struct pktgen_thread *t;
3039
3040 func_enter();
3041
3042 mutex_lock(&pktgen_thread_lock);
3043
3044 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3045 t->control |= T_STOP;
3046
3047 mutex_unlock(&pktgen_thread_lock);
3048 }
3049
3050 static int thread_is_running(const struct pktgen_thread *t)
3051 {
3052 const struct pktgen_dev *pkt_dev;
3053
3054 rcu_read_lock();
3055 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
3056 if (pkt_dev->running) {
3057 rcu_read_unlock();
3058 return 1;
3059 }
3060 rcu_read_unlock();
3061 return 0;
3062 }
3063
3064 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3065 {
3066 while (thread_is_running(t)) {
3067
3068 /* note: 't' will still be around even after the unlock/lock
3069 * cycle because pktgen_thread threads are only cleared at
3070 * net exit
3071 */
3072 mutex_unlock(&pktgen_thread_lock);
3073 msleep_interruptible(100);
3074 mutex_lock(&pktgen_thread_lock);
3075
3076 if (signal_pending(current))
3077 goto signal;
3078 }
3079 return 1;
3080 signal:
3081 return 0;
3082 }
3083
3084 static int pktgen_wait_all_threads_run(struct pktgen_net *pn)
3085 {
3086 struct pktgen_thread *t;
3087 int sig = 1;
3088
3089 /* prevent from racing with rmmod */
3090 if (!try_module_get(THIS_MODULE))
3091 return sig;
3092
3093 mutex_lock(&pktgen_thread_lock);
3094
3095 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
3096 sig = pktgen_wait_thread_run(t);
3097 if (sig == 0)
3098 break;
3099 }
3100
3101 if (sig == 0)
3102 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3103 t->control |= (T_STOP);
3104
3105 mutex_unlock(&pktgen_thread_lock);
3106 module_put(THIS_MODULE);
3107 return sig;
3108 }
3109
3110 static void pktgen_run_all_threads(struct pktgen_net *pn)
3111 {
3112 struct pktgen_thread *t;
3113
3114 func_enter();
3115
3116 mutex_lock(&pktgen_thread_lock);
3117
3118 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3119 t->control |= (T_RUN);
3120
3121 mutex_unlock(&pktgen_thread_lock);
3122
3123 /* Propagate thread->control */
3124 schedule_timeout_interruptible(msecs_to_jiffies(125));
3125
3126 pktgen_wait_all_threads_run(pn);
3127 }
3128
3129 static void pktgen_reset_all_threads(struct pktgen_net *pn)
3130 {
3131 struct pktgen_thread *t;
3132
3133 func_enter();
3134
3135 mutex_lock(&pktgen_thread_lock);
3136
3137 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3138 t->control |= (T_REMDEVALL);
3139
3140 mutex_unlock(&pktgen_thread_lock);
3141
3142 /* Propagate thread->control */
3143 schedule_timeout_interruptible(msecs_to_jiffies(125));
3144
3145 pktgen_wait_all_threads_run(pn);
3146 }
3147
3148 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3149 {
3150 __u64 bps, mbps, pps;
3151 char *p = pkt_dev->result;
3152 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3153 pkt_dev->started_at);
3154 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3155
3156 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3157 (unsigned long long)ktime_to_us(elapsed),
3158 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3159 (unsigned long long)ktime_to_us(idle),
3160 (unsigned long long)pkt_dev->sofar,
3161 pkt_dev->cur_pkt_size, nr_frags);
3162
3163 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3164 ktime_to_ns(elapsed));
3165
3166 bps = pps * 8 * pkt_dev->cur_pkt_size;
3167
3168 mbps = bps;
3169 do_div(mbps, 1000000);
3170 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3171 (unsigned long long)pps,
3172 (unsigned long long)mbps,
3173 (unsigned long long)bps,
3174 (unsigned long long)pkt_dev->errors);
3175 }
3176
3177 /* Set stopped-at timer, remove from running list, do counters & statistics */
3178 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3179 {
3180 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3181
3182 if (!pkt_dev->running) {
3183 pr_warn("interface: %s is already stopped\n",
3184 pkt_dev->odevname);
3185 return -EINVAL;
3186 }
3187
3188 pkt_dev->running = 0;
3189 kfree_skb(pkt_dev->skb);
3190 pkt_dev->skb = NULL;
3191 pkt_dev->stopped_at = ktime_get();
3192
3193 show_results(pkt_dev, nr_frags);
3194
3195 return 0;
3196 }
3197
3198 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3199 {
3200 struct pktgen_dev *pkt_dev, *best = NULL;
3201
3202 rcu_read_lock();
3203 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3204 if (!pkt_dev->running)
3205 continue;
3206 if (best == NULL)
3207 best = pkt_dev;
3208 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0)
3209 best = pkt_dev;
3210 }
3211 rcu_read_unlock();
3212
3213 return best;
3214 }
3215
3216 static void pktgen_stop(struct pktgen_thread *t)
3217 {
3218 struct pktgen_dev *pkt_dev;
3219
3220 func_enter();
3221
3222 rcu_read_lock();
3223
3224 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3225 pktgen_stop_device(pkt_dev);
3226 }
3227
3228 rcu_read_unlock();
3229 }
3230
3231 /*
3232 * one of our devices needs to be removed - find it
3233 * and remove it
3234 */
3235 static void pktgen_rem_one_if(struct pktgen_thread *t)
3236 {
3237 struct list_head *q, *n;
3238 struct pktgen_dev *cur;
3239
3240 func_enter();
3241
3242 list_for_each_safe(q, n, &t->if_list) {
3243 cur = list_entry(q, struct pktgen_dev, list);
3244
3245 if (!cur->removal_mark)
3246 continue;
3247
3248 kfree_skb(cur->skb);
3249 cur->skb = NULL;
3250
3251 pktgen_remove_device(t, cur);
3252
3253 break;
3254 }
3255 }
3256
3257 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3258 {
3259 struct list_head *q, *n;
3260 struct pktgen_dev *cur;
3261
3262 func_enter();
3263
3264 /* Remove all devices, free mem */
3265
3266 list_for_each_safe(q, n, &t->if_list) {
3267 cur = list_entry(q, struct pktgen_dev, list);
3268
3269 kfree_skb(cur->skb);
3270 cur->skb = NULL;
3271
3272 pktgen_remove_device(t, cur);
3273 }
3274 }
3275
3276 static void pktgen_rem_thread(struct pktgen_thread *t)
3277 {
3278 /* Remove from the thread list */
3279 remove_proc_entry(t->tsk->comm, t->net->proc_dir);
3280 }
3281
3282 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3283 {
3284 ktime_t idle_start = ktime_get();
3285 schedule();
3286 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3287 }
3288
3289 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3290 {
3291 ktime_t idle_start = ktime_get();
3292
3293 while (refcount_read(&(pkt_dev->skb->users)) != 1) {
3294 if (signal_pending(current))
3295 break;
3296
3297 if (need_resched())
3298 pktgen_resched(pkt_dev);
3299 else
3300 cpu_relax();
3301 }
3302 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3303 }
3304
3305 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3306 {
3307 unsigned int burst = READ_ONCE(pkt_dev->burst);
3308 struct net_device *odev = pkt_dev->odev;
3309 struct netdev_queue *txq;
3310 struct sk_buff *skb;
3311 int ret;
3312
3313 /* If device is offline, then don't send */
3314 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3315 pktgen_stop_device(pkt_dev);
3316 return;
3317 }
3318
3319 /* This is max DELAY, this has special meaning of
3320 * "never transmit"
3321 */
3322 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3323 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
3324 return;
3325 }
3326
3327 /* If no skb or clone count exhausted then get new one */
3328 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3329 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3330 /* build a new pkt */
3331 kfree_skb(pkt_dev->skb);
3332
3333 pkt_dev->skb = fill_packet(odev, pkt_dev);
3334 if (pkt_dev->skb == NULL) {
3335 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3336 schedule();
3337 pkt_dev->clone_count--; /* back out increment, OOM */
3338 return;
3339 }
3340 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3341 pkt_dev->clone_count = 0; /* reset counter */
3342 }
3343
3344 if (pkt_dev->delay && pkt_dev->last_ok)
3345 spin(pkt_dev, pkt_dev->next_tx);
3346
3347 if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) {
3348 skb = pkt_dev->skb;
3349 skb->protocol = eth_type_trans(skb, skb->dev);
3350 refcount_add(burst, &skb->users);
3351 local_bh_disable();
3352 do {
3353 ret = netif_receive_skb(skb);
3354 if (ret == NET_RX_DROP)
3355 pkt_dev->errors++;
3356 pkt_dev->sofar++;
3357 pkt_dev->seq_num++;
3358 if (refcount_read(&skb->users) != burst) {
3359 /* skb was queued by rps/rfs or taps,
3360 * so cannot reuse this skb
3361 */
3362 WARN_ON(refcount_sub_and_test(burst - 1, &skb->users));
3363 /* get out of the loop and wait
3364 * until skb is consumed
3365 */
3366 break;
3367 }
3368 /* skb was 'freed' by stack, so clean few
3369 * bits and reuse it
3370 */
3371 skb_reset_tc(skb);
3372 } while (--burst > 0);
3373 goto out; /* Skips xmit_mode M_START_XMIT */
3374 } else if (pkt_dev->xmit_mode == M_QUEUE_XMIT) {
3375 local_bh_disable();
3376 refcount_inc(&pkt_dev->skb->users);
3377
3378 ret = dev_queue_xmit(pkt_dev->skb);
3379 switch (ret) {
3380 case NET_XMIT_SUCCESS:
3381 pkt_dev->sofar++;
3382 pkt_dev->seq_num++;
3383 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3384 break;
3385 case NET_XMIT_DROP:
3386 case NET_XMIT_CN:
3387 /* These are all valid return codes for a qdisc but
3388 * indicate packets are being dropped or will likely
3389 * be dropped soon.
3390 */
3391 case NETDEV_TX_BUSY:
3392 /* qdisc may call dev_hard_start_xmit directly in cases
3393 * where no queues exist e.g. loopback device, virtual
3394 * devices, etc. In this case we need to handle
3395 * NETDEV_TX_ codes.
3396 */
3397 default:
3398 pkt_dev->errors++;
3399 net_info_ratelimited("%s xmit error: %d\n",
3400 pkt_dev->odevname, ret);
3401 break;
3402 }
3403 goto out;
3404 }
3405
3406 txq = skb_get_tx_queue(odev, pkt_dev->skb);
3407
3408 local_bh_disable();
3409
3410 HARD_TX_LOCK(odev, txq, smp_processor_id());
3411
3412 if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) {
3413 ret = NETDEV_TX_BUSY;
3414 pkt_dev->last_ok = 0;
3415 goto unlock;
3416 }
3417 refcount_add(burst, &pkt_dev->skb->users);
3418
3419 xmit_more:
3420 ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0);
3421
3422 switch (ret) {
3423 case NETDEV_TX_OK:
3424 pkt_dev->last_ok = 1;
3425 pkt_dev->sofar++;
3426 pkt_dev->seq_num++;
3427 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3428 if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq))
3429 goto xmit_more;
3430 break;
3431 case NET_XMIT_DROP:
3432 case NET_XMIT_CN:
3433 /* skb has been consumed */
3434 pkt_dev->errors++;
3435 break;
3436 default: /* Drivers are not supposed to return other values! */
3437 net_info_ratelimited("%s xmit error: %d\n",
3438 pkt_dev->odevname, ret);
3439 pkt_dev->errors++;
3440 /* fallthru */
3441 case NETDEV_TX_BUSY:
3442 /* Retry it next time */
3443 refcount_dec(&(pkt_dev->skb->users));
3444 pkt_dev->last_ok = 0;
3445 }
3446 if (unlikely(burst))
3447 WARN_ON(refcount_sub_and_test(burst, &pkt_dev->skb->users));
3448 unlock:
3449 HARD_TX_UNLOCK(odev, txq);
3450
3451 out:
3452 local_bh_enable();
3453
3454 /* If pkt_dev->count is zero, then run forever */
3455 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3456 pktgen_wait_for_skb(pkt_dev);
3457
3458 /* Done with this */
3459 pktgen_stop_device(pkt_dev);
3460 }
3461 }
3462
3463 /*
3464 * Main loop of the thread goes here
3465 */
3466
3467 static int pktgen_thread_worker(void *arg)
3468 {
3469 DEFINE_WAIT(wait);
3470 struct pktgen_thread *t = arg;
3471 struct pktgen_dev *pkt_dev = NULL;
3472 int cpu = t->cpu;
3473
3474 BUG_ON(smp_processor_id() != cpu);
3475
3476 init_waitqueue_head(&t->queue);
3477 complete(&t->start_done);
3478
3479 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3480
3481 set_freezable();
3482
3483 while (!kthread_should_stop()) {
3484 pkt_dev = next_to_run(t);
3485
3486 if (unlikely(!pkt_dev && t->control == 0)) {
3487 if (t->net->pktgen_exiting)
3488 break;
3489 wait_event_interruptible_timeout(t->queue,
3490 t->control != 0,
3491 HZ/10);
3492 try_to_freeze();
3493 continue;
3494 }
3495
3496 if (likely(pkt_dev)) {
3497 pktgen_xmit(pkt_dev);
3498
3499 if (need_resched())
3500 pktgen_resched(pkt_dev);
3501 else
3502 cpu_relax();
3503 }
3504
3505 if (t->control & T_STOP) {
3506 pktgen_stop(t);
3507 t->control &= ~(T_STOP);
3508 }
3509
3510 if (t->control & T_RUN) {
3511 pktgen_run(t);
3512 t->control &= ~(T_RUN);
3513 }
3514
3515 if (t->control & T_REMDEVALL) {
3516 pktgen_rem_all_ifs(t);
3517 t->control &= ~(T_REMDEVALL);
3518 }
3519
3520 if (t->control & T_REMDEV) {
3521 pktgen_rem_one_if(t);
3522 t->control &= ~(T_REMDEV);
3523 }
3524
3525 try_to_freeze();
3526 }
3527
3528 pr_debug("%s stopping all device\n", t->tsk->comm);
3529 pktgen_stop(t);
3530
3531 pr_debug("%s removing all device\n", t->tsk->comm);
3532 pktgen_rem_all_ifs(t);
3533
3534 pr_debug("%s removing thread\n", t->tsk->comm);
3535 pktgen_rem_thread(t);
3536
3537 return 0;
3538 }
3539
3540 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3541 const char *ifname, bool exact)
3542 {
3543 struct pktgen_dev *p, *pkt_dev = NULL;
3544 size_t len = strlen(ifname);
3545
3546 rcu_read_lock();
3547 list_for_each_entry_rcu(p, &t->if_list, list)
3548 if (strncmp(p->odevname, ifname, len) == 0) {
3549 if (p->odevname[len]) {
3550 if (exact || p->odevname[len] != '@')
3551 continue;
3552 }
3553 pkt_dev = p;
3554 break;
3555 }
3556
3557 rcu_read_unlock();
3558 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3559 return pkt_dev;
3560 }
3561
3562 /*
3563 * Adds a dev at front of if_list.
3564 */
3565
3566 static int add_dev_to_thread(struct pktgen_thread *t,
3567 struct pktgen_dev *pkt_dev)
3568 {
3569 int rv = 0;
3570
3571 /* This function cannot be called concurrently, as its called
3572 * under pktgen_thread_lock mutex, but it can run from
3573 * userspace on another CPU than the kthread. The if_lock()
3574 * is used here to sync with concurrent instances of
3575 * _rem_dev_from_if_list() invoked via kthread, which is also
3576 * updating the if_list */
3577 if_lock(t);
3578
3579 if (pkt_dev->pg_thread) {
3580 pr_err("ERROR: already assigned to a thread\n");
3581 rv = -EBUSY;
3582 goto out;
3583 }
3584
3585 pkt_dev->running = 0;
3586 pkt_dev->pg_thread = t;
3587 list_add_rcu(&pkt_dev->list, &t->if_list);
3588
3589 out:
3590 if_unlock(t);
3591 return rv;
3592 }
3593
3594 /* Called under thread lock */
3595
3596 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3597 {
3598 struct pktgen_dev *pkt_dev;
3599 int err;
3600 int node = cpu_to_node(t->cpu);
3601
3602 /* We don't allow a device to be on several threads */
3603
3604 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND);
3605 if (pkt_dev) {
3606 pr_err("ERROR: interface already used\n");
3607 return -EBUSY;
3608 }
3609
3610 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3611 if (!pkt_dev)
3612 return -ENOMEM;
3613
3614 strcpy(pkt_dev->odevname, ifname);
3615 pkt_dev->flows = vzalloc_node(array_size(MAX_CFLOWS,
3616 sizeof(struct flow_state)),
3617 node);
3618 if (pkt_dev->flows == NULL) {
3619 kfree(pkt_dev);
3620 return -ENOMEM;
3621 }
3622
3623 pkt_dev->removal_mark = 0;
3624 pkt_dev->nfrags = 0;
3625 pkt_dev->delay = pg_delay_d;
3626 pkt_dev->count = pg_count_d;
3627 pkt_dev->sofar = 0;
3628 pkt_dev->udp_src_min = 9; /* sink port */
3629 pkt_dev->udp_src_max = 9;
3630 pkt_dev->udp_dst_min = 9;
3631 pkt_dev->udp_dst_max = 9;
3632 pkt_dev->vlan_p = 0;
3633 pkt_dev->vlan_cfi = 0;
3634 pkt_dev->vlan_id = 0xffff;
3635 pkt_dev->svlan_p = 0;
3636 pkt_dev->svlan_cfi = 0;
3637 pkt_dev->svlan_id = 0xffff;
3638 pkt_dev->burst = 1;
3639 pkt_dev->node = -1;
3640
3641 err = pktgen_setup_dev(t->net, pkt_dev, ifname);
3642 if (err)
3643 goto out1;
3644 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3645 pkt_dev->clone_skb = pg_clone_skb_d;
3646
3647 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir,
3648 &pktgen_if_fops, pkt_dev);
3649 if (!pkt_dev->entry) {
3650 pr_err("cannot create %s/%s procfs entry\n",
3651 PG_PROC_DIR, ifname);
3652 err = -EINVAL;
3653 goto out2;
3654 }
3655 #ifdef CONFIG_XFRM
3656 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3657 pkt_dev->ipsproto = IPPROTO_ESP;
3658
3659 /* xfrm tunnel mode needs additional dst to extract outter
3660 * ip header protocol/ttl/id field, here creat a phony one.
3661 * instead of looking for a valid rt, which definitely hurting
3662 * performance under such circumstance.
3663 */
3664 pkt_dev->dstops.family = AF_INET;
3665 pkt_dev->xdst.u.dst.dev = pkt_dev->odev;
3666 dst_init_metrics(&pkt_dev->xdst.u.dst, pktgen_dst_metrics, false);
3667 pkt_dev->xdst.child = &pkt_dev->xdst.u.dst;
3668 pkt_dev->xdst.u.dst.ops = &pkt_dev->dstops;
3669 #endif
3670
3671 return add_dev_to_thread(t, pkt_dev);
3672 out2:
3673 dev_put(pkt_dev->odev);
3674 out1:
3675 #ifdef CONFIG_XFRM
3676 free_SAs(pkt_dev);
3677 #endif
3678 vfree(pkt_dev->flows);
3679 kfree(pkt_dev);
3680 return err;
3681 }
3682
3683 static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
3684 {
3685 struct pktgen_thread *t;
3686 struct proc_dir_entry *pe;
3687 struct task_struct *p;
3688
3689 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3690 cpu_to_node(cpu));
3691 if (!t) {
3692 pr_err("ERROR: out of memory, can't create new thread\n");
3693 return -ENOMEM;
3694 }
3695
3696 mutex_init(&t->if_lock);
3697 t->cpu = cpu;
3698
3699 INIT_LIST_HEAD(&t->if_list);
3700
3701 list_add_tail(&t->th_list, &pn->pktgen_threads);
3702 init_completion(&t->start_done);
3703
3704 p = kthread_create_on_node(pktgen_thread_worker,
3705 t,
3706 cpu_to_node(cpu),
3707 "kpktgend_%d", cpu);
3708 if (IS_ERR(p)) {
3709 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3710 list_del(&t->th_list);
3711 kfree(t);
3712 return PTR_ERR(p);
3713 }
3714 kthread_bind(p, cpu);
3715 t->tsk = p;
3716
3717 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
3718 &pktgen_thread_fops, t);
3719 if (!pe) {
3720 pr_err("cannot create %s/%s procfs entry\n",
3721 PG_PROC_DIR, t->tsk->comm);
3722 kthread_stop(p);
3723 list_del(&t->th_list);
3724 kfree(t);
3725 return -EINVAL;
3726 }
3727
3728 t->net = pn;
3729 get_task_struct(p);
3730 wake_up_process(p);
3731 wait_for_completion(&t->start_done);
3732
3733 return 0;
3734 }
3735
3736 /*
3737 * Removes a device from the thread if_list.
3738 */
3739 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3740 struct pktgen_dev *pkt_dev)
3741 {
3742 struct list_head *q, *n;
3743 struct pktgen_dev *p;
3744
3745 if_lock(t);
3746 list_for_each_safe(q, n, &t->if_list) {
3747 p = list_entry(q, struct pktgen_dev, list);
3748 if (p == pkt_dev)
3749 list_del_rcu(&p->list);
3750 }
3751 if_unlock(t);
3752 }
3753
3754 static int pktgen_remove_device(struct pktgen_thread *t,
3755 struct pktgen_dev *pkt_dev)
3756 {
3757 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3758
3759 if (pkt_dev->running) {
3760 pr_warn("WARNING: trying to remove a running interface, stopping it now\n");
3761 pktgen_stop_device(pkt_dev);
3762 }
3763
3764 /* Dis-associate from the interface */
3765
3766 if (pkt_dev->odev) {
3767 dev_put(pkt_dev->odev);
3768 pkt_dev->odev = NULL;
3769 }
3770
3771 /* Remove proc before if_list entry, because add_device uses
3772 * list to determine if interface already exist, avoid race
3773 * with proc_create_data() */
3774 proc_remove(pkt_dev->entry);
3775
3776 /* And update the thread if_list */
3777 _rem_dev_from_if_list(t, pkt_dev);
3778
3779 #ifdef CONFIG_XFRM
3780 free_SAs(pkt_dev);
3781 #endif
3782 vfree(pkt_dev->flows);
3783 if (pkt_dev->page)
3784 put_page(pkt_dev->page);
3785 kfree_rcu(pkt_dev, rcu);
3786 return 0;
3787 }
3788
3789 static int __net_init pg_net_init(struct net *net)
3790 {
3791 struct pktgen_net *pn = net_generic(net, pg_net_id);
3792 struct proc_dir_entry *pe;
3793 int cpu, ret = 0;
3794
3795 pn->net = net;
3796 INIT_LIST_HEAD(&pn->pktgen_threads);
3797 pn->pktgen_exiting = false;
3798 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net);
3799 if (!pn->proc_dir) {
3800 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR);
3801 return -ENODEV;
3802 }
3803 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops);
3804 if (pe == NULL) {
3805 pr_err("cannot create %s procfs entry\n", PGCTRL);
3806 ret = -EINVAL;
3807 goto remove;
3808 }
3809
3810 for_each_online_cpu(cpu) {
3811 int err;
3812
3813 err = pktgen_create_thread(cpu, pn);
3814 if (err)
3815 pr_warn("Cannot create thread for cpu %d (%d)\n",
3816 cpu, err);
3817 }
3818
3819 if (list_empty(&pn->pktgen_threads)) {
3820 pr_err("Initialization failed for all threads\n");
3821 ret = -ENODEV;
3822 goto remove_entry;
3823 }
3824
3825 return 0;
3826
3827 remove_entry:
3828 remove_proc_entry(PGCTRL, pn->proc_dir);
3829 remove:
3830 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3831 return ret;
3832 }
3833
3834 static void __net_exit pg_net_exit(struct net *net)
3835 {
3836 struct pktgen_net *pn = net_generic(net, pg_net_id);
3837 struct pktgen_thread *t;
3838 struct list_head *q, *n;
3839 LIST_HEAD(list);
3840
3841 /* Stop all interfaces & threads */
3842 pn->pktgen_exiting = true;
3843
3844 mutex_lock(&pktgen_thread_lock);
3845 list_splice_init(&pn->pktgen_threads, &list);
3846 mutex_unlock(&pktgen_thread_lock);
3847
3848 list_for_each_safe(q, n, &list) {
3849 t = list_entry(q, struct pktgen_thread, th_list);
3850 list_del(&t->th_list);
3851 kthread_stop(t->tsk);
3852 put_task_struct(t->tsk);
3853 kfree(t);
3854 }
3855
3856 remove_proc_entry(PGCTRL, pn->proc_dir);
3857 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3858 }
3859
3860 static struct pernet_operations pg_net_ops = {
3861 .init = pg_net_init,
3862 .exit = pg_net_exit,
3863 .id = &pg_net_id,
3864 .size = sizeof(struct pktgen_net),
3865 };
3866
3867 static int __init pg_init(void)
3868 {
3869 int ret = 0;
3870
3871 pr_info("%s", version);
3872 ret = register_pernet_subsys(&pg_net_ops);
3873 if (ret)
3874 return ret;
3875 ret = register_netdevice_notifier(&pktgen_notifier_block);
3876 if (ret)
3877 unregister_pernet_subsys(&pg_net_ops);
3878
3879 return ret;
3880 }
3881
3882 static void __exit pg_cleanup(void)
3883 {
3884 unregister_netdevice_notifier(&pktgen_notifier_block);
3885 unregister_pernet_subsys(&pg_net_ops);
3886 /* Don't need rcu_barrier() due to use of kfree_rcu() */
3887 }
3888
3889 module_init(pg_init);
3890 module_exit(pg_cleanup);
3891
3892 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3893 MODULE_DESCRIPTION("Packet Generator tool");
3894 MODULE_LICENSE("GPL");
3895 MODULE_VERSION(VERSION);
3896 module_param(pg_count_d, int, 0);
3897 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3898 module_param(pg_delay_d, int, 0);
3899 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3900 module_param(pg_clone_skb_d, int, 0);
3901 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3902 module_param(debug, int, 0);
3903 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
Linux with added FPC-III support