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 waring
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 "2.74"
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 /* Device flag bits */
188 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
189 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
190 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
191 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
192 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
193 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
194 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
195 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
196 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
197 #define F_VID_RND (1<<9) /* Random VLAN ID */
198 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
199 #define F_FLOW_SEQ (1<<11) /* Sequential flows */
200 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */
201 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
202 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
203 #define F_NODE (1<<15) /* Node memory alloc*/
204 #define F_UDPCSUM (1<<16) /* Include UDP checksum */
205 #define F_NO_TIMESTAMP (1<<17) /* Don't timestamp packets (default TS) */
206
207 /* Thread control flag bits */
208 #define T_STOP (1<<0) /* Stop run */
209 #define T_RUN (1<<1) /* Start run */
210 #define T_REMDEVALL (1<<2) /* Remove all devs */
211 #define T_REMDEV (1<<3) /* Remove one dev */
212
213 /* If lock -- protects updating of if_list */
214 #define if_lock(t) mutex_lock(&(t->if_lock));
215 #define if_unlock(t) mutex_unlock(&(t->if_lock));
216
217 /* Used to help with determining the pkts on receive */
218 #define PKTGEN_MAGIC 0xbe9be955
219 #define PG_PROC_DIR "pktgen"
220 #define PGCTRL "pgctrl"
221
222 #define MAX_CFLOWS 65536
223
224 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
225 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
226
227 struct flow_state {
228 __be32 cur_daddr;
229 int count;
230 #ifdef CONFIG_XFRM
231 struct xfrm_state *x;
232 #endif
233 __u32 flags;
234 };
235
236 /* flow flag bits */
237 #define F_INIT (1<<0) /* flow has been initialized */
238
239 struct pktgen_dev {
240 /*
241 * Try to keep frequent/infrequent used vars. separated.
242 */
243 struct proc_dir_entry *entry; /* proc file */
244 struct pktgen_thread *pg_thread;/* the owner */
245 struct list_head list; /* chaining in the thread's run-queue */
246 struct rcu_head rcu; /* freed by RCU */
247
248 int running; /* if false, the test will stop */
249
250 /* If min != max, then we will either do a linear iteration, or
251 * we will do a random selection from within the range.
252 */
253 __u32 flags;
254 int removal_mark; /* non-zero => the device is marked for
255 * removal by worker thread */
256
257 int min_pkt_size;
258 int max_pkt_size;
259 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
260 int nfrags;
261 struct page *page;
262 u64 delay; /* nano-seconds */
263
264 __u64 count; /* Default No packets to send */
265 __u64 sofar; /* How many pkts we've sent so far */
266 __u64 tx_bytes; /* How many bytes we've transmitted */
267 __u64 errors; /* Errors when trying to transmit, */
268
269 /* runtime counters relating to clone_skb */
270
271 __u64 allocated_skbs;
272 __u32 clone_count;
273 int last_ok; /* Was last skb sent?
274 * Or a failed transmit of some sort?
275 * This will keep sequence numbers in order
276 */
277 ktime_t next_tx;
278 ktime_t started_at;
279 ktime_t stopped_at;
280 u64 idle_acc; /* nano-seconds */
281
282 __u32 seq_num;
283
284 int clone_skb; /*
285 * Use multiple SKBs during packet gen.
286 * If this number is greater than 1, then
287 * that many copies of the same packet will be
288 * sent before a new packet is allocated.
289 * If you want to send 1024 identical packets
290 * before creating a new packet,
291 * set clone_skb to 1024.
292 */
293
294 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
295 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
296 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
297 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
298
299 struct in6_addr in6_saddr;
300 struct in6_addr in6_daddr;
301 struct in6_addr cur_in6_daddr;
302 struct in6_addr cur_in6_saddr;
303 /* For ranges */
304 struct in6_addr min_in6_daddr;
305 struct in6_addr max_in6_daddr;
306 struct in6_addr min_in6_saddr;
307 struct in6_addr max_in6_saddr;
308
309 /* If we're doing ranges, random or incremental, then this
310 * defines the min/max for those ranges.
311 */
312 __be32 saddr_min; /* inclusive, source IP address */
313 __be32 saddr_max; /* exclusive, source IP address */
314 __be32 daddr_min; /* inclusive, dest IP address */
315 __be32 daddr_max; /* exclusive, dest IP address */
316
317 __u16 udp_src_min; /* inclusive, source UDP port */
318 __u16 udp_src_max; /* exclusive, source UDP port */
319 __u16 udp_dst_min; /* inclusive, dest UDP port */
320 __u16 udp_dst_max; /* exclusive, dest UDP port */
321
322 /* DSCP + ECN */
323 __u8 tos; /* six MSB of (former) IPv4 TOS
324 are for dscp codepoint */
325 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
326 (see RFC 3260, sec. 4) */
327
328 /* MPLS */
329 unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */
330 __be32 labels[MAX_MPLS_LABELS];
331
332 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
333 __u8 vlan_p;
334 __u8 vlan_cfi;
335 __u16 vlan_id; /* 0xffff means no vlan tag */
336
337 __u8 svlan_p;
338 __u8 svlan_cfi;
339 __u16 svlan_id; /* 0xffff means no svlan tag */
340
341 __u32 src_mac_count; /* How many MACs to iterate through */
342 __u32 dst_mac_count; /* How many MACs to iterate through */
343
344 unsigned char dst_mac[ETH_ALEN];
345 unsigned char src_mac[ETH_ALEN];
346
347 __u32 cur_dst_mac_offset;
348 __u32 cur_src_mac_offset;
349 __be32 cur_saddr;
350 __be32 cur_daddr;
351 __u16 ip_id;
352 __u16 cur_udp_dst;
353 __u16 cur_udp_src;
354 __u16 cur_queue_map;
355 __u32 cur_pkt_size;
356 __u32 last_pkt_size;
357
358 __u8 hh[14];
359 /* = {
360 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
361
362 We fill in SRC address later
363 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
364 0x08, 0x00
365 };
366 */
367 __u16 pad; /* pad out the hh struct to an even 16 bytes */
368
369 struct sk_buff *skb; /* skb we are to transmit next, used for when we
370 * are transmitting the same one multiple times
371 */
372 struct net_device *odev; /* The out-going device.
373 * Note that the device should have it's
374 * pg_info pointer pointing back to this
375 * device.
376 * Set when the user specifies the out-going
377 * device name (not when the inject is
378 * started as it used to do.)
379 */
380 char odevname[32];
381 struct flow_state *flows;
382 unsigned int cflows; /* Concurrent flows (config) */
383 unsigned int lflow; /* Flow length (config) */
384 unsigned int nflows; /* accumulated flows (stats) */
385 unsigned int curfl; /* current sequenced flow (state)*/
386
387 u16 queue_map_min;
388 u16 queue_map_max;
389 __u32 skb_priority; /* skb priority field */
390 unsigned int burst; /* number of duplicated packets to burst */
391 int node; /* Memory node */
392
393 #ifdef CONFIG_XFRM
394 __u8 ipsmode; /* IPSEC mode (config) */
395 __u8 ipsproto; /* IPSEC type (config) */
396 __u32 spi;
397 struct dst_entry dst;
398 struct dst_ops dstops;
399 #endif
400 char result[512];
401 };
402
403 struct pktgen_hdr {
404 __be32 pgh_magic;
405 __be32 seq_num;
406 __be32 tv_sec;
407 __be32 tv_usec;
408 };
409
410
411 static int pg_net_id __read_mostly;
412
413 struct pktgen_net {
414 struct net *net;
415 struct proc_dir_entry *proc_dir;
416 struct list_head pktgen_threads;
417 bool pktgen_exiting;
418 };
419
420 struct pktgen_thread {
421 struct mutex if_lock; /* for list of devices */
422 struct list_head if_list; /* All device here */
423 struct list_head th_list;
424 struct task_struct *tsk;
425 char result[512];
426
427 /* Field for thread to receive "posted" events terminate,
428 stop ifs etc. */
429
430 u32 control;
431 int cpu;
432
433 wait_queue_head_t queue;
434 struct completion start_done;
435 struct pktgen_net *net;
436 };
437
438 #define REMOVE 1
439 #define FIND 0
440
441 static const char version[] =
442 "Packet Generator for packet performance testing. "
443 "Version: " VERSION "\n";
444
445 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
446 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
447 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
448 const char *ifname, bool exact);
449 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
450 static void pktgen_run_all_threads(struct pktgen_net *pn);
451 static void pktgen_reset_all_threads(struct pktgen_net *pn);
452 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn);
453
454 static void pktgen_stop(struct pktgen_thread *t);
455 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
456
457 /* Module parameters, defaults. */
458 static int pg_count_d __read_mostly = 1000;
459 static int pg_delay_d __read_mostly;
460 static int pg_clone_skb_d __read_mostly;
461 static int debug __read_mostly;
462
463 static DEFINE_MUTEX(pktgen_thread_lock);
464
465 static struct notifier_block pktgen_notifier_block = {
466 .notifier_call = pktgen_device_event,
467 };
468
469 /*
470 * /proc handling functions
471 *
472 */
473
pgctrl_show(struct seq_file * seq,void * v)474 static int pgctrl_show(struct seq_file *seq, void *v)
475 {
476 seq_puts(seq, version);
477 return 0;
478 }
479
pgctrl_write(struct file * file,const char __user * buf,size_t count,loff_t * ppos)480 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
481 size_t count, loff_t *ppos)
482 {
483 char data[128];
484 struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
485
486 if (!capable(CAP_NET_ADMIN))
487 return -EPERM;
488
489 if (count == 0)
490 return -EINVAL;
491
492 if (count > sizeof(data))
493 count = sizeof(data);
494
495 if (copy_from_user(data, buf, count))
496 return -EFAULT;
497
498 data[count - 1] = 0; /* Strip trailing '\n' and terminate string */
499
500 if (!strcmp(data, "stop"))
501 pktgen_stop_all_threads_ifs(pn);
502
503 else if (!strcmp(data, "start"))
504 pktgen_run_all_threads(pn);
505
506 else if (!strcmp(data, "reset"))
507 pktgen_reset_all_threads(pn);
508
509 else
510 pr_warn("Unknown command: %s\n", data);
511
512 return count;
513 }
514
pgctrl_open(struct inode * inode,struct file * file)515 static int pgctrl_open(struct inode *inode, struct file *file)
516 {
517 return single_open(file, pgctrl_show, PDE_DATA(inode));
518 }
519
520 static const struct file_operations pktgen_fops = {
521 .owner = THIS_MODULE,
522 .open = pgctrl_open,
523 .read = seq_read,
524 .llseek = seq_lseek,
525 .write = pgctrl_write,
526 .release = single_release,
527 };
528
pktgen_if_show(struct seq_file * seq,void * v)529 static int pktgen_if_show(struct seq_file *seq, void *v)
530 {
531 const struct pktgen_dev *pkt_dev = seq->private;
532 ktime_t stopped;
533 u64 idle;
534
535 seq_printf(seq,
536 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
537 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
538 pkt_dev->max_pkt_size);
539
540 seq_printf(seq,
541 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
542 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
543 pkt_dev->clone_skb, pkt_dev->odevname);
544
545 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
546 pkt_dev->lflow);
547
548 seq_printf(seq,
549 " queue_map_min: %u queue_map_max: %u\n",
550 pkt_dev->queue_map_min,
551 pkt_dev->queue_map_max);
552
553 if (pkt_dev->skb_priority)
554 seq_printf(seq, " skb_priority: %u\n",
555 pkt_dev->skb_priority);
556
557 if (pkt_dev->flags & F_IPV6) {
558 seq_printf(seq,
559 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
560 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
561 &pkt_dev->in6_saddr,
562 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
563 &pkt_dev->in6_daddr,
564 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
565 } else {
566 seq_printf(seq,
567 " dst_min: %s dst_max: %s\n",
568 pkt_dev->dst_min, pkt_dev->dst_max);
569 seq_printf(seq,
570 " src_min: %s src_max: %s\n",
571 pkt_dev->src_min, pkt_dev->src_max);
572 }
573
574 seq_puts(seq, " src_mac: ");
575
576 seq_printf(seq, "%pM ",
577 is_zero_ether_addr(pkt_dev->src_mac) ?
578 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
579
580 seq_puts(seq, "dst_mac: ");
581 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
582
583 seq_printf(seq,
584 " udp_src_min: %d udp_src_max: %d"
585 " udp_dst_min: %d udp_dst_max: %d\n",
586 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
587 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
588
589 seq_printf(seq,
590 " src_mac_count: %d dst_mac_count: %d\n",
591 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
592
593 if (pkt_dev->nr_labels) {
594 unsigned int i;
595 seq_puts(seq, " mpls: ");
596 for (i = 0; i < pkt_dev->nr_labels; i++)
597 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
598 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
599 }
600
601 if (pkt_dev->vlan_id != 0xffff)
602 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
603 pkt_dev->vlan_id, pkt_dev->vlan_p,
604 pkt_dev->vlan_cfi);
605
606 if (pkt_dev->svlan_id != 0xffff)
607 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
608 pkt_dev->svlan_id, pkt_dev->svlan_p,
609 pkt_dev->svlan_cfi);
610
611 if (pkt_dev->tos)
612 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
613
614 if (pkt_dev->traffic_class)
615 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
616
617 if (pkt_dev->burst > 1)
618 seq_printf(seq, " burst: %d\n", pkt_dev->burst);
619
620 if (pkt_dev->node >= 0)
621 seq_printf(seq, " node: %d\n", pkt_dev->node);
622
623 seq_puts(seq, " Flags: ");
624
625 if (pkt_dev->flags & F_IPV6)
626 seq_puts(seq, "IPV6 ");
627
628 if (pkt_dev->flags & F_IPSRC_RND)
629 seq_puts(seq, "IPSRC_RND ");
630
631 if (pkt_dev->flags & F_IPDST_RND)
632 seq_puts(seq, "IPDST_RND ");
633
634 if (pkt_dev->flags & F_TXSIZE_RND)
635 seq_puts(seq, "TXSIZE_RND ");
636
637 if (pkt_dev->flags & F_UDPSRC_RND)
638 seq_puts(seq, "UDPSRC_RND ");
639
640 if (pkt_dev->flags & F_UDPDST_RND)
641 seq_puts(seq, "UDPDST_RND ");
642
643 if (pkt_dev->flags & F_UDPCSUM)
644 seq_puts(seq, "UDPCSUM ");
645
646 if (pkt_dev->flags & F_NO_TIMESTAMP)
647 seq_puts(seq, "NO_TIMESTAMP ");
648
649 if (pkt_dev->flags & F_MPLS_RND)
650 seq_puts(seq, "MPLS_RND ");
651
652 if (pkt_dev->flags & F_QUEUE_MAP_RND)
653 seq_puts(seq, "QUEUE_MAP_RND ");
654
655 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
656 seq_puts(seq, "QUEUE_MAP_CPU ");
657
658 if (pkt_dev->cflows) {
659 if (pkt_dev->flags & F_FLOW_SEQ)
660 seq_puts(seq, "FLOW_SEQ "); /*in sequence flows*/
661 else
662 seq_puts(seq, "FLOW_RND ");
663 }
664
665 #ifdef CONFIG_XFRM
666 if (pkt_dev->flags & F_IPSEC_ON) {
667 seq_puts(seq, "IPSEC ");
668 if (pkt_dev->spi)
669 seq_printf(seq, "spi:%u", pkt_dev->spi);
670 }
671 #endif
672
673 if (pkt_dev->flags & F_MACSRC_RND)
674 seq_puts(seq, "MACSRC_RND ");
675
676 if (pkt_dev->flags & F_MACDST_RND)
677 seq_puts(seq, "MACDST_RND ");
678
679 if (pkt_dev->flags & F_VID_RND)
680 seq_puts(seq, "VID_RND ");
681
682 if (pkt_dev->flags & F_SVID_RND)
683 seq_puts(seq, "SVID_RND ");
684
685 if (pkt_dev->flags & F_NODE)
686 seq_puts(seq, "NODE_ALLOC ");
687
688 seq_puts(seq, "\n");
689
690 /* not really stopped, more like last-running-at */
691 stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at;
692 idle = pkt_dev->idle_acc;
693 do_div(idle, NSEC_PER_USEC);
694
695 seq_printf(seq,
696 "Current:\n pkts-sofar: %llu errors: %llu\n",
697 (unsigned long long)pkt_dev->sofar,
698 (unsigned long long)pkt_dev->errors);
699
700 seq_printf(seq,
701 " started: %lluus stopped: %lluus idle: %lluus\n",
702 (unsigned long long) ktime_to_us(pkt_dev->started_at),
703 (unsigned long long) ktime_to_us(stopped),
704 (unsigned long long) idle);
705
706 seq_printf(seq,
707 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
708 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
709 pkt_dev->cur_src_mac_offset);
710
711 if (pkt_dev->flags & F_IPV6) {
712 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
713 &pkt_dev->cur_in6_saddr,
714 &pkt_dev->cur_in6_daddr);
715 } else
716 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n",
717 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
718
719 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
720 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
721
722 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
723
724 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
725
726 if (pkt_dev->result[0])
727 seq_printf(seq, "Result: %s\n", pkt_dev->result);
728 else
729 seq_puts(seq, "Result: Idle\n");
730
731 return 0;
732 }
733
734
hex32_arg(const char __user * user_buffer,unsigned long maxlen,__u32 * num)735 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
736 __u32 *num)
737 {
738 int i = 0;
739 *num = 0;
740
741 for (; i < maxlen; i++) {
742 int value;
743 char c;
744 *num <<= 4;
745 if (get_user(c, &user_buffer[i]))
746 return -EFAULT;
747 value = hex_to_bin(c);
748 if (value >= 0)
749 *num |= value;
750 else
751 break;
752 }
753 return i;
754 }
755
count_trail_chars(const char __user * user_buffer,unsigned int maxlen)756 static int count_trail_chars(const char __user * user_buffer,
757 unsigned int maxlen)
758 {
759 int i;
760
761 for (i = 0; i < maxlen; i++) {
762 char c;
763 if (get_user(c, &user_buffer[i]))
764 return -EFAULT;
765 switch (c) {
766 case '\"':
767 case '\n':
768 case '\r':
769 case '\t':
770 case ' ':
771 case '=':
772 break;
773 default:
774 goto done;
775 }
776 }
777 done:
778 return i;
779 }
780
num_arg(const char __user * user_buffer,unsigned long maxlen,unsigned long * num)781 static long num_arg(const char __user *user_buffer, unsigned long maxlen,
782 unsigned long *num)
783 {
784 int i;
785 *num = 0;
786
787 for (i = 0; i < maxlen; i++) {
788 char c;
789 if (get_user(c, &user_buffer[i]))
790 return -EFAULT;
791 if ((c >= '0') && (c <= '9')) {
792 *num *= 10;
793 *num += c - '0';
794 } else
795 break;
796 }
797 return i;
798 }
799
strn_len(const char __user * user_buffer,unsigned int maxlen)800 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
801 {
802 int i;
803
804 for (i = 0; i < maxlen; i++) {
805 char c;
806 if (get_user(c, &user_buffer[i]))
807 return -EFAULT;
808 switch (c) {
809 case '\"':
810 case '\n':
811 case '\r':
812 case '\t':
813 case ' ':
814 goto done_str;
815 default:
816 break;
817 }
818 }
819 done_str:
820 return i;
821 }
822
get_labels(const char __user * buffer,struct pktgen_dev * pkt_dev)823 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
824 {
825 unsigned int n = 0;
826 char c;
827 ssize_t i = 0;
828 int len;
829
830 pkt_dev->nr_labels = 0;
831 do {
832 __u32 tmp;
833 len = hex32_arg(&buffer[i], 8, &tmp);
834 if (len <= 0)
835 return len;
836 pkt_dev->labels[n] = htonl(tmp);
837 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
838 pkt_dev->flags |= F_MPLS_RND;
839 i += len;
840 if (get_user(c, &buffer[i]))
841 return -EFAULT;
842 i++;
843 n++;
844 if (n >= MAX_MPLS_LABELS)
845 return -E2BIG;
846 } while (c == ',');
847
848 pkt_dev->nr_labels = n;
849 return i;
850 }
851
pktgen_if_write(struct file * file,const char __user * user_buffer,size_t count,loff_t * offset)852 static ssize_t pktgen_if_write(struct file *file,
853 const char __user * user_buffer, size_t count,
854 loff_t * offset)
855 {
856 struct seq_file *seq = file->private_data;
857 struct pktgen_dev *pkt_dev = seq->private;
858 int i, max, len;
859 char name[16], valstr[32];
860 unsigned long value = 0;
861 char *pg_result = NULL;
862 int tmp = 0;
863 char buf[128];
864
865 pg_result = &(pkt_dev->result[0]);
866
867 if (count < 1) {
868 pr_warn("wrong command format\n");
869 return -EINVAL;
870 }
871
872 max = count;
873 tmp = count_trail_chars(user_buffer, max);
874 if (tmp < 0) {
875 pr_warn("illegal format\n");
876 return tmp;
877 }
878 i = tmp;
879
880 /* Read variable name */
881
882 len = strn_len(&user_buffer[i], sizeof(name) - 1);
883 if (len < 0)
884 return len;
885
886 memset(name, 0, sizeof(name));
887 if (copy_from_user(name, &user_buffer[i], len))
888 return -EFAULT;
889 i += len;
890
891 max = count - i;
892 len = count_trail_chars(&user_buffer[i], max);
893 if (len < 0)
894 return len;
895
896 i += len;
897
898 if (debug) {
899 size_t copy = min_t(size_t, count, 1023);
900 char tb[copy + 1];
901 if (copy_from_user(tb, user_buffer, copy))
902 return -EFAULT;
903 tb[copy] = 0;
904 pr_debug("%s,%lu buffer -:%s:-\n",
905 name, (unsigned long)count, tb);
906 }
907
908 if (!strcmp(name, "min_pkt_size")) {
909 len = num_arg(&user_buffer[i], 10, &value);
910 if (len < 0)
911 return len;
912
913 i += len;
914 if (value < 14 + 20 + 8)
915 value = 14 + 20 + 8;
916 if (value != pkt_dev->min_pkt_size) {
917 pkt_dev->min_pkt_size = value;
918 pkt_dev->cur_pkt_size = value;
919 }
920 sprintf(pg_result, "OK: min_pkt_size=%u",
921 pkt_dev->min_pkt_size);
922 return count;
923 }
924
925 if (!strcmp(name, "max_pkt_size")) {
926 len = num_arg(&user_buffer[i], 10, &value);
927 if (len < 0)
928 return len;
929
930 i += len;
931 if (value < 14 + 20 + 8)
932 value = 14 + 20 + 8;
933 if (value != pkt_dev->max_pkt_size) {
934 pkt_dev->max_pkt_size = value;
935 pkt_dev->cur_pkt_size = value;
936 }
937 sprintf(pg_result, "OK: max_pkt_size=%u",
938 pkt_dev->max_pkt_size);
939 return count;
940 }
941
942 /* Shortcut for min = max */
943
944 if (!strcmp(name, "pkt_size")) {
945 len = num_arg(&user_buffer[i], 10, &value);
946 if (len < 0)
947 return len;
948
949 i += len;
950 if (value < 14 + 20 + 8)
951 value = 14 + 20 + 8;
952 if (value != pkt_dev->min_pkt_size) {
953 pkt_dev->min_pkt_size = value;
954 pkt_dev->max_pkt_size = value;
955 pkt_dev->cur_pkt_size = value;
956 }
957 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
958 return count;
959 }
960
961 if (!strcmp(name, "debug")) {
962 len = num_arg(&user_buffer[i], 10, &value);
963 if (len < 0)
964 return len;
965
966 i += len;
967 debug = value;
968 sprintf(pg_result, "OK: debug=%u", debug);
969 return count;
970 }
971
972 if (!strcmp(name, "frags")) {
973 len = num_arg(&user_buffer[i], 10, &value);
974 if (len < 0)
975 return len;
976
977 i += len;
978 pkt_dev->nfrags = value;
979 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
980 return count;
981 }
982 if (!strcmp(name, "delay")) {
983 len = num_arg(&user_buffer[i], 10, &value);
984 if (len < 0)
985 return len;
986
987 i += len;
988 if (value == 0x7FFFFFFF)
989 pkt_dev->delay = ULLONG_MAX;
990 else
991 pkt_dev->delay = (u64)value;
992
993 sprintf(pg_result, "OK: delay=%llu",
994 (unsigned long long) pkt_dev->delay);
995 return count;
996 }
997 if (!strcmp(name, "rate")) {
998 len = num_arg(&user_buffer[i], 10, &value);
999 if (len < 0)
1000 return len;
1001
1002 i += len;
1003 if (!value)
1004 return len;
1005 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
1006 if (debug)
1007 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1008
1009 sprintf(pg_result, "OK: rate=%lu", value);
1010 return count;
1011 }
1012 if (!strcmp(name, "ratep")) {
1013 len = num_arg(&user_buffer[i], 10, &value);
1014 if (len < 0)
1015 return len;
1016
1017 i += len;
1018 if (!value)
1019 return len;
1020 pkt_dev->delay = NSEC_PER_SEC/value;
1021 if (debug)
1022 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1023
1024 sprintf(pg_result, "OK: rate=%lu", value);
1025 return count;
1026 }
1027 if (!strcmp(name, "udp_src_min")) {
1028 len = num_arg(&user_buffer[i], 10, &value);
1029 if (len < 0)
1030 return len;
1031
1032 i += len;
1033 if (value != pkt_dev->udp_src_min) {
1034 pkt_dev->udp_src_min = value;
1035 pkt_dev->cur_udp_src = value;
1036 }
1037 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1038 return count;
1039 }
1040 if (!strcmp(name, "udp_dst_min")) {
1041 len = num_arg(&user_buffer[i], 10, &value);
1042 if (len < 0)
1043 return len;
1044
1045 i += len;
1046 if (value != pkt_dev->udp_dst_min) {
1047 pkt_dev->udp_dst_min = value;
1048 pkt_dev->cur_udp_dst = value;
1049 }
1050 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1051 return count;
1052 }
1053 if (!strcmp(name, "udp_src_max")) {
1054 len = num_arg(&user_buffer[i], 10, &value);
1055 if (len < 0)
1056 return len;
1057
1058 i += len;
1059 if (value != pkt_dev->udp_src_max) {
1060 pkt_dev->udp_src_max = value;
1061 pkt_dev->cur_udp_src = value;
1062 }
1063 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1064 return count;
1065 }
1066 if (!strcmp(name, "udp_dst_max")) {
1067 len = num_arg(&user_buffer[i], 10, &value);
1068 if (len < 0)
1069 return len;
1070
1071 i += len;
1072 if (value != pkt_dev->udp_dst_max) {
1073 pkt_dev->udp_dst_max = value;
1074 pkt_dev->cur_udp_dst = value;
1075 }
1076 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1077 return count;
1078 }
1079 if (!strcmp(name, "clone_skb")) {
1080 len = num_arg(&user_buffer[i], 10, &value);
1081 if (len < 0)
1082 return len;
1083 if ((value > 0) &&
1084 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1085 return -ENOTSUPP;
1086 i += len;
1087 pkt_dev->clone_skb = value;
1088
1089 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1090 return count;
1091 }
1092 if (!strcmp(name, "count")) {
1093 len = num_arg(&user_buffer[i], 10, &value);
1094 if (len < 0)
1095 return len;
1096
1097 i += len;
1098 pkt_dev->count = value;
1099 sprintf(pg_result, "OK: count=%llu",
1100 (unsigned long long)pkt_dev->count);
1101 return count;
1102 }
1103 if (!strcmp(name, "src_mac_count")) {
1104 len = num_arg(&user_buffer[i], 10, &value);
1105 if (len < 0)
1106 return len;
1107
1108 i += len;
1109 if (pkt_dev->src_mac_count != value) {
1110 pkt_dev->src_mac_count = value;
1111 pkt_dev->cur_src_mac_offset = 0;
1112 }
1113 sprintf(pg_result, "OK: src_mac_count=%d",
1114 pkt_dev->src_mac_count);
1115 return count;
1116 }
1117 if (!strcmp(name, "dst_mac_count")) {
1118 len = num_arg(&user_buffer[i], 10, &value);
1119 if (len < 0)
1120 return len;
1121
1122 i += len;
1123 if (pkt_dev->dst_mac_count != value) {
1124 pkt_dev->dst_mac_count = value;
1125 pkt_dev->cur_dst_mac_offset = 0;
1126 }
1127 sprintf(pg_result, "OK: dst_mac_count=%d",
1128 pkt_dev->dst_mac_count);
1129 return count;
1130 }
1131 if (!strcmp(name, "burst")) {
1132 len = num_arg(&user_buffer[i], 10, &value);
1133 if (len < 0)
1134 return len;
1135
1136 i += len;
1137 if ((value > 1) &&
1138 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1139 return -ENOTSUPP;
1140 pkt_dev->burst = value < 1 ? 1 : value;
1141 sprintf(pg_result, "OK: burst=%d", pkt_dev->burst);
1142 return count;
1143 }
1144 if (!strcmp(name, "node")) {
1145 len = num_arg(&user_buffer[i], 10, &value);
1146 if (len < 0)
1147 return len;
1148
1149 i += len;
1150
1151 if (node_possible(value)) {
1152 pkt_dev->node = value;
1153 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1154 if (pkt_dev->page) {
1155 put_page(pkt_dev->page);
1156 pkt_dev->page = NULL;
1157 }
1158 }
1159 else
1160 sprintf(pg_result, "ERROR: node not possible");
1161 return count;
1162 }
1163 if (!strcmp(name, "flag")) {
1164 char f[32];
1165 memset(f, 0, 32);
1166 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1167 if (len < 0)
1168 return len;
1169
1170 if (copy_from_user(f, &user_buffer[i], len))
1171 return -EFAULT;
1172 i += len;
1173 if (strcmp(f, "IPSRC_RND") == 0)
1174 pkt_dev->flags |= F_IPSRC_RND;
1175
1176 else if (strcmp(f, "!IPSRC_RND") == 0)
1177 pkt_dev->flags &= ~F_IPSRC_RND;
1178
1179 else if (strcmp(f, "TXSIZE_RND") == 0)
1180 pkt_dev->flags |= F_TXSIZE_RND;
1181
1182 else if (strcmp(f, "!TXSIZE_RND") == 0)
1183 pkt_dev->flags &= ~F_TXSIZE_RND;
1184
1185 else if (strcmp(f, "IPDST_RND") == 0)
1186 pkt_dev->flags |= F_IPDST_RND;
1187
1188 else if (strcmp(f, "!IPDST_RND") == 0)
1189 pkt_dev->flags &= ~F_IPDST_RND;
1190
1191 else if (strcmp(f, "UDPSRC_RND") == 0)
1192 pkt_dev->flags |= F_UDPSRC_RND;
1193
1194 else if (strcmp(f, "!UDPSRC_RND") == 0)
1195 pkt_dev->flags &= ~F_UDPSRC_RND;
1196
1197 else if (strcmp(f, "UDPDST_RND") == 0)
1198 pkt_dev->flags |= F_UDPDST_RND;
1199
1200 else if (strcmp(f, "!UDPDST_RND") == 0)
1201 pkt_dev->flags &= ~F_UDPDST_RND;
1202
1203 else if (strcmp(f, "MACSRC_RND") == 0)
1204 pkt_dev->flags |= F_MACSRC_RND;
1205
1206 else if (strcmp(f, "!MACSRC_RND") == 0)
1207 pkt_dev->flags &= ~F_MACSRC_RND;
1208
1209 else if (strcmp(f, "MACDST_RND") == 0)
1210 pkt_dev->flags |= F_MACDST_RND;
1211
1212 else if (strcmp(f, "!MACDST_RND") == 0)
1213 pkt_dev->flags &= ~F_MACDST_RND;
1214
1215 else if (strcmp(f, "MPLS_RND") == 0)
1216 pkt_dev->flags |= F_MPLS_RND;
1217
1218 else if (strcmp(f, "!MPLS_RND") == 0)
1219 pkt_dev->flags &= ~F_MPLS_RND;
1220
1221 else if (strcmp(f, "VID_RND") == 0)
1222 pkt_dev->flags |= F_VID_RND;
1223
1224 else if (strcmp(f, "!VID_RND") == 0)
1225 pkt_dev->flags &= ~F_VID_RND;
1226
1227 else if (strcmp(f, "SVID_RND") == 0)
1228 pkt_dev->flags |= F_SVID_RND;
1229
1230 else if (strcmp(f, "!SVID_RND") == 0)
1231 pkt_dev->flags &= ~F_SVID_RND;
1232
1233 else if (strcmp(f, "FLOW_SEQ") == 0)
1234 pkt_dev->flags |= F_FLOW_SEQ;
1235
1236 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1237 pkt_dev->flags |= F_QUEUE_MAP_RND;
1238
1239 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1240 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1241
1242 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1243 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1244
1245 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1246 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1247 #ifdef CONFIG_XFRM
1248 else if (strcmp(f, "IPSEC") == 0)
1249 pkt_dev->flags |= F_IPSEC_ON;
1250 #endif
1251
1252 else if (strcmp(f, "!IPV6") == 0)
1253 pkt_dev->flags &= ~F_IPV6;
1254
1255 else if (strcmp(f, "NODE_ALLOC") == 0)
1256 pkt_dev->flags |= F_NODE;
1257
1258 else if (strcmp(f, "!NODE_ALLOC") == 0)
1259 pkt_dev->flags &= ~F_NODE;
1260
1261 else if (strcmp(f, "UDPCSUM") == 0)
1262 pkt_dev->flags |= F_UDPCSUM;
1263
1264 else if (strcmp(f, "!UDPCSUM") == 0)
1265 pkt_dev->flags &= ~F_UDPCSUM;
1266
1267 else if (strcmp(f, "NO_TIMESTAMP") == 0)
1268 pkt_dev->flags |= F_NO_TIMESTAMP;
1269
1270 else {
1271 sprintf(pg_result,
1272 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1273 f,
1274 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1275 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, "
1276 "MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, "
1277 "QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, "
1278 "NO_TIMESTAMP, "
1279 #ifdef CONFIG_XFRM
1280 "IPSEC, "
1281 #endif
1282 "NODE_ALLOC\n");
1283 return count;
1284 }
1285 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1286 return count;
1287 }
1288 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1289 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1290 if (len < 0)
1291 return len;
1292
1293 if (copy_from_user(buf, &user_buffer[i], len))
1294 return -EFAULT;
1295 buf[len] = 0;
1296 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1297 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1298 strncpy(pkt_dev->dst_min, buf, len);
1299 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1300 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1301 }
1302 if (debug)
1303 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
1304 i += len;
1305 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1306 return count;
1307 }
1308 if (!strcmp(name, "dst_max")) {
1309 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1310 if (len < 0)
1311 return len;
1312
1313
1314 if (copy_from_user(buf, &user_buffer[i], len))
1315 return -EFAULT;
1316
1317 buf[len] = 0;
1318 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1319 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1320 strncpy(pkt_dev->dst_max, buf, len);
1321 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1322 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1323 }
1324 if (debug)
1325 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
1326 i += len;
1327 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1328 return count;
1329 }
1330 if (!strcmp(name, "dst6")) {
1331 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1332 if (len < 0)
1333 return len;
1334
1335 pkt_dev->flags |= F_IPV6;
1336
1337 if (copy_from_user(buf, &user_buffer[i], len))
1338 return -EFAULT;
1339 buf[len] = 0;
1340
1341 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
1342 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1343
1344 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1345
1346 if (debug)
1347 pr_debug("dst6 set to: %s\n", buf);
1348
1349 i += len;
1350 sprintf(pg_result, "OK: dst6=%s", buf);
1351 return count;
1352 }
1353 if (!strcmp(name, "dst6_min")) {
1354 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1355 if (len < 0)
1356 return len;
1357
1358 pkt_dev->flags |= F_IPV6;
1359
1360 if (copy_from_user(buf, &user_buffer[i], len))
1361 return -EFAULT;
1362 buf[len] = 0;
1363
1364 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
1365 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1366
1367 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
1368 if (debug)
1369 pr_debug("dst6_min set to: %s\n", buf);
1370
1371 i += len;
1372 sprintf(pg_result, "OK: dst6_min=%s", buf);
1373 return count;
1374 }
1375 if (!strcmp(name, "dst6_max")) {
1376 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1377 if (len < 0)
1378 return len;
1379
1380 pkt_dev->flags |= F_IPV6;
1381
1382 if (copy_from_user(buf, &user_buffer[i], len))
1383 return -EFAULT;
1384 buf[len] = 0;
1385
1386 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
1387 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1388
1389 if (debug)
1390 pr_debug("dst6_max set to: %s\n", buf);
1391
1392 i += len;
1393 sprintf(pg_result, "OK: dst6_max=%s", buf);
1394 return count;
1395 }
1396 if (!strcmp(name, "src6")) {
1397 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1398 if (len < 0)
1399 return len;
1400
1401 pkt_dev->flags |= F_IPV6;
1402
1403 if (copy_from_user(buf, &user_buffer[i], len))
1404 return -EFAULT;
1405 buf[len] = 0;
1406
1407 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
1408 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1409
1410 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1411
1412 if (debug)
1413 pr_debug("src6 set to: %s\n", buf);
1414
1415 i += len;
1416 sprintf(pg_result, "OK: src6=%s", buf);
1417 return count;
1418 }
1419 if (!strcmp(name, "src_min")) {
1420 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1421 if (len < 0)
1422 return len;
1423
1424 if (copy_from_user(buf, &user_buffer[i], len))
1425 return -EFAULT;
1426 buf[len] = 0;
1427 if (strcmp(buf, pkt_dev->src_min) != 0) {
1428 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1429 strncpy(pkt_dev->src_min, buf, len);
1430 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1431 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1432 }
1433 if (debug)
1434 pr_debug("src_min set to: %s\n", pkt_dev->src_min);
1435 i += len;
1436 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1437 return count;
1438 }
1439 if (!strcmp(name, "src_max")) {
1440 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1441 if (len < 0)
1442 return len;
1443
1444 if (copy_from_user(buf, &user_buffer[i], len))
1445 return -EFAULT;
1446 buf[len] = 0;
1447 if (strcmp(buf, pkt_dev->src_max) != 0) {
1448 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1449 strncpy(pkt_dev->src_max, buf, len);
1450 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1451 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1452 }
1453 if (debug)
1454 pr_debug("src_max set to: %s\n", pkt_dev->src_max);
1455 i += len;
1456 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1457 return count;
1458 }
1459 if (!strcmp(name, "dst_mac")) {
1460 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1461 if (len < 0)
1462 return len;
1463
1464 memset(valstr, 0, sizeof(valstr));
1465 if (copy_from_user(valstr, &user_buffer[i], len))
1466 return -EFAULT;
1467
1468 if (!mac_pton(valstr, pkt_dev->dst_mac))
1469 return -EINVAL;
1470 /* Set up Dest MAC */
1471 ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac);
1472
1473 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1474 return count;
1475 }
1476 if (!strcmp(name, "src_mac")) {
1477 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1478 if (len < 0)
1479 return len;
1480
1481 memset(valstr, 0, sizeof(valstr));
1482 if (copy_from_user(valstr, &user_buffer[i], len))
1483 return -EFAULT;
1484
1485 if (!mac_pton(valstr, pkt_dev->src_mac))
1486 return -EINVAL;
1487 /* Set up Src MAC */
1488 ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac);
1489
1490 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1491 return count;
1492 }
1493
1494 if (!strcmp(name, "clear_counters")) {
1495 pktgen_clear_counters(pkt_dev);
1496 sprintf(pg_result, "OK: Clearing counters.\n");
1497 return count;
1498 }
1499
1500 if (!strcmp(name, "flows")) {
1501 len = num_arg(&user_buffer[i], 10, &value);
1502 if (len < 0)
1503 return len;
1504
1505 i += len;
1506 if (value > MAX_CFLOWS)
1507 value = MAX_CFLOWS;
1508
1509 pkt_dev->cflows = value;
1510 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1511 return count;
1512 }
1513 #ifdef CONFIG_XFRM
1514 if (!strcmp(name, "spi")) {
1515 len = num_arg(&user_buffer[i], 10, &value);
1516 if (len < 0)
1517 return len;
1518
1519 i += len;
1520 pkt_dev->spi = value;
1521 sprintf(pg_result, "OK: spi=%u", pkt_dev->spi);
1522 return count;
1523 }
1524 #endif
1525 if (!strcmp(name, "flowlen")) {
1526 len = num_arg(&user_buffer[i], 10, &value);
1527 if (len < 0)
1528 return len;
1529
1530 i += len;
1531 pkt_dev->lflow = value;
1532 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1533 return count;
1534 }
1535
1536 if (!strcmp(name, "queue_map_min")) {
1537 len = num_arg(&user_buffer[i], 5, &value);
1538 if (len < 0)
1539 return len;
1540
1541 i += len;
1542 pkt_dev->queue_map_min = value;
1543 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1544 return count;
1545 }
1546
1547 if (!strcmp(name, "queue_map_max")) {
1548 len = num_arg(&user_buffer[i], 5, &value);
1549 if (len < 0)
1550 return len;
1551
1552 i += len;
1553 pkt_dev->queue_map_max = value;
1554 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1555 return count;
1556 }
1557
1558 if (!strcmp(name, "mpls")) {
1559 unsigned int n, cnt;
1560
1561 len = get_labels(&user_buffer[i], pkt_dev);
1562 if (len < 0)
1563 return len;
1564 i += len;
1565 cnt = sprintf(pg_result, "OK: mpls=");
1566 for (n = 0; n < pkt_dev->nr_labels; n++)
1567 cnt += sprintf(pg_result + cnt,
1568 "%08x%s", ntohl(pkt_dev->labels[n]),
1569 n == pkt_dev->nr_labels-1 ? "" : ",");
1570
1571 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1572 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1573 pkt_dev->svlan_id = 0xffff;
1574
1575 if (debug)
1576 pr_debug("VLAN/SVLAN auto turned off\n");
1577 }
1578 return count;
1579 }
1580
1581 if (!strcmp(name, "vlan_id")) {
1582 len = num_arg(&user_buffer[i], 4, &value);
1583 if (len < 0)
1584 return len;
1585
1586 i += len;
1587 if (value <= 4095) {
1588 pkt_dev->vlan_id = value; /* turn on VLAN */
1589
1590 if (debug)
1591 pr_debug("VLAN turned on\n");
1592
1593 if (debug && pkt_dev->nr_labels)
1594 pr_debug("MPLS auto turned off\n");
1595
1596 pkt_dev->nr_labels = 0; /* turn off MPLS */
1597 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1598 } else {
1599 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1600 pkt_dev->svlan_id = 0xffff;
1601
1602 if (debug)
1603 pr_debug("VLAN/SVLAN turned off\n");
1604 }
1605 return count;
1606 }
1607
1608 if (!strcmp(name, "vlan_p")) {
1609 len = num_arg(&user_buffer[i], 1, &value);
1610 if (len < 0)
1611 return len;
1612
1613 i += len;
1614 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1615 pkt_dev->vlan_p = value;
1616 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1617 } else {
1618 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1619 }
1620 return count;
1621 }
1622
1623 if (!strcmp(name, "vlan_cfi")) {
1624 len = num_arg(&user_buffer[i], 1, &value);
1625 if (len < 0)
1626 return len;
1627
1628 i += len;
1629 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1630 pkt_dev->vlan_cfi = value;
1631 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1632 } else {
1633 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1634 }
1635 return count;
1636 }
1637
1638 if (!strcmp(name, "svlan_id")) {
1639 len = num_arg(&user_buffer[i], 4, &value);
1640 if (len < 0)
1641 return len;
1642
1643 i += len;
1644 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1645 pkt_dev->svlan_id = value; /* turn on SVLAN */
1646
1647 if (debug)
1648 pr_debug("SVLAN turned on\n");
1649
1650 if (debug && pkt_dev->nr_labels)
1651 pr_debug("MPLS auto turned off\n");
1652
1653 pkt_dev->nr_labels = 0; /* turn off MPLS */
1654 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1655 } else {
1656 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1657 pkt_dev->svlan_id = 0xffff;
1658
1659 if (debug)
1660 pr_debug("VLAN/SVLAN turned off\n");
1661 }
1662 return count;
1663 }
1664
1665 if (!strcmp(name, "svlan_p")) {
1666 len = num_arg(&user_buffer[i], 1, &value);
1667 if (len < 0)
1668 return len;
1669
1670 i += len;
1671 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1672 pkt_dev->svlan_p = value;
1673 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1674 } else {
1675 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1676 }
1677 return count;
1678 }
1679
1680 if (!strcmp(name, "svlan_cfi")) {
1681 len = num_arg(&user_buffer[i], 1, &value);
1682 if (len < 0)
1683 return len;
1684
1685 i += len;
1686 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1687 pkt_dev->svlan_cfi = value;
1688 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1689 } else {
1690 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1691 }
1692 return count;
1693 }
1694
1695 if (!strcmp(name, "tos")) {
1696 __u32 tmp_value = 0;
1697 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1698 if (len < 0)
1699 return len;
1700
1701 i += len;
1702 if (len == 2) {
1703 pkt_dev->tos = tmp_value;
1704 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1705 } else {
1706 sprintf(pg_result, "ERROR: tos must be 00-ff");
1707 }
1708 return count;
1709 }
1710
1711 if (!strcmp(name, "traffic_class")) {
1712 __u32 tmp_value = 0;
1713 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1714 if (len < 0)
1715 return len;
1716
1717 i += len;
1718 if (len == 2) {
1719 pkt_dev->traffic_class = tmp_value;
1720 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1721 } else {
1722 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1723 }
1724 return count;
1725 }
1726
1727 if (!strcmp(name, "skb_priority")) {
1728 len = num_arg(&user_buffer[i], 9, &value);
1729 if (len < 0)
1730 return len;
1731
1732 i += len;
1733 pkt_dev->skb_priority = value;
1734 sprintf(pg_result, "OK: skb_priority=%i",
1735 pkt_dev->skb_priority);
1736 return count;
1737 }
1738
1739 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1740 return -EINVAL;
1741 }
1742
pktgen_if_open(struct inode * inode,struct file * file)1743 static int pktgen_if_open(struct inode *inode, struct file *file)
1744 {
1745 return single_open(file, pktgen_if_show, PDE_DATA(inode));
1746 }
1747
1748 static const struct file_operations pktgen_if_fops = {
1749 .owner = THIS_MODULE,
1750 .open = pktgen_if_open,
1751 .read = seq_read,
1752 .llseek = seq_lseek,
1753 .write = pktgen_if_write,
1754 .release = single_release,
1755 };
1756
pktgen_thread_show(struct seq_file * seq,void * v)1757 static int pktgen_thread_show(struct seq_file *seq, void *v)
1758 {
1759 struct pktgen_thread *t = seq->private;
1760 const struct pktgen_dev *pkt_dev;
1761
1762 BUG_ON(!t);
1763
1764 seq_puts(seq, "Running: ");
1765
1766 rcu_read_lock();
1767 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1768 if (pkt_dev->running)
1769 seq_printf(seq, "%s ", pkt_dev->odevname);
1770
1771 seq_puts(seq, "\nStopped: ");
1772
1773 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1774 if (!pkt_dev->running)
1775 seq_printf(seq, "%s ", pkt_dev->odevname);
1776
1777 if (t->result[0])
1778 seq_printf(seq, "\nResult: %s\n", t->result);
1779 else
1780 seq_puts(seq, "\nResult: NA\n");
1781
1782 rcu_read_unlock();
1783
1784 return 0;
1785 }
1786
pktgen_thread_write(struct file * file,const char __user * user_buffer,size_t count,loff_t * offset)1787 static ssize_t pktgen_thread_write(struct file *file,
1788 const char __user * user_buffer,
1789 size_t count, loff_t * offset)
1790 {
1791 struct seq_file *seq = file->private_data;
1792 struct pktgen_thread *t = seq->private;
1793 int i, max, len, ret;
1794 char name[40];
1795 char *pg_result;
1796
1797 if (count < 1) {
1798 // sprintf(pg_result, "Wrong command format");
1799 return -EINVAL;
1800 }
1801
1802 max = count;
1803 len = count_trail_chars(user_buffer, max);
1804 if (len < 0)
1805 return len;
1806
1807 i = len;
1808
1809 /* Read variable name */
1810
1811 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1812 if (len < 0)
1813 return len;
1814
1815 memset(name, 0, sizeof(name));
1816 if (copy_from_user(name, &user_buffer[i], len))
1817 return -EFAULT;
1818 i += len;
1819
1820 max = count - i;
1821 len = count_trail_chars(&user_buffer[i], max);
1822 if (len < 0)
1823 return len;
1824
1825 i += len;
1826
1827 if (debug)
1828 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
1829
1830 if (!t) {
1831 pr_err("ERROR: No thread\n");
1832 ret = -EINVAL;
1833 goto out;
1834 }
1835
1836 pg_result = &(t->result[0]);
1837
1838 if (!strcmp(name, "add_device")) {
1839 char f[32];
1840 memset(f, 0, 32);
1841 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1842 if (len < 0) {
1843 ret = len;
1844 goto out;
1845 }
1846 if (copy_from_user(f, &user_buffer[i], len))
1847 return -EFAULT;
1848 i += len;
1849 mutex_lock(&pktgen_thread_lock);
1850 ret = pktgen_add_device(t, f);
1851 mutex_unlock(&pktgen_thread_lock);
1852 if (!ret) {
1853 ret = count;
1854 sprintf(pg_result, "OK: add_device=%s", f);
1855 } else
1856 sprintf(pg_result, "ERROR: can not add device %s", f);
1857 goto out;
1858 }
1859
1860 if (!strcmp(name, "rem_device_all")) {
1861 mutex_lock(&pktgen_thread_lock);
1862 t->control |= T_REMDEVALL;
1863 mutex_unlock(&pktgen_thread_lock);
1864 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1865 ret = count;
1866 sprintf(pg_result, "OK: rem_device_all");
1867 goto out;
1868 }
1869
1870 if (!strcmp(name, "max_before_softirq")) {
1871 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1872 ret = count;
1873 goto out;
1874 }
1875
1876 ret = -EINVAL;
1877 out:
1878 return ret;
1879 }
1880
pktgen_thread_open(struct inode * inode,struct file * file)1881 static int pktgen_thread_open(struct inode *inode, struct file *file)
1882 {
1883 return single_open(file, pktgen_thread_show, PDE_DATA(inode));
1884 }
1885
1886 static const struct file_operations pktgen_thread_fops = {
1887 .owner = THIS_MODULE,
1888 .open = pktgen_thread_open,
1889 .read = seq_read,
1890 .llseek = seq_lseek,
1891 .write = pktgen_thread_write,
1892 .release = single_release,
1893 };
1894
1895 /* Think find or remove for NN */
__pktgen_NN_threads(const struct pktgen_net * pn,const char * ifname,int remove)1896 static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn,
1897 const char *ifname, int remove)
1898 {
1899 struct pktgen_thread *t;
1900 struct pktgen_dev *pkt_dev = NULL;
1901 bool exact = (remove == FIND);
1902
1903 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1904 pkt_dev = pktgen_find_dev(t, ifname, exact);
1905 if (pkt_dev) {
1906 if (remove) {
1907 pkt_dev->removal_mark = 1;
1908 t->control |= T_REMDEV;
1909 }
1910 break;
1911 }
1912 }
1913 return pkt_dev;
1914 }
1915
1916 /*
1917 * mark a device for removal
1918 */
pktgen_mark_device(const struct pktgen_net * pn,const char * ifname)1919 static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname)
1920 {
1921 struct pktgen_dev *pkt_dev = NULL;
1922 const int max_tries = 10, msec_per_try = 125;
1923 int i = 0;
1924
1925 mutex_lock(&pktgen_thread_lock);
1926 pr_debug("%s: marking %s for removal\n", __func__, ifname);
1927
1928 while (1) {
1929
1930 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE);
1931 if (pkt_dev == NULL)
1932 break; /* success */
1933
1934 mutex_unlock(&pktgen_thread_lock);
1935 pr_debug("%s: waiting for %s to disappear....\n",
1936 __func__, ifname);
1937 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1938 mutex_lock(&pktgen_thread_lock);
1939
1940 if (++i >= max_tries) {
1941 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
1942 __func__, msec_per_try * i, ifname);
1943 break;
1944 }
1945
1946 }
1947
1948 mutex_unlock(&pktgen_thread_lock);
1949 }
1950
pktgen_change_name(const struct pktgen_net * pn,struct net_device * dev)1951 static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev)
1952 {
1953 struct pktgen_thread *t;
1954
1955 mutex_lock(&pktgen_thread_lock);
1956
1957 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1958 struct pktgen_dev *pkt_dev;
1959
1960 if_lock(t);
1961 list_for_each_entry(pkt_dev, &t->if_list, list) {
1962 if (pkt_dev->odev != dev)
1963 continue;
1964
1965 proc_remove(pkt_dev->entry);
1966
1967 pkt_dev->entry = proc_create_data(dev->name, 0600,
1968 pn->proc_dir,
1969 &pktgen_if_fops,
1970 pkt_dev);
1971 if (!pkt_dev->entry)
1972 pr_err("can't move proc entry for '%s'\n",
1973 dev->name);
1974 break;
1975 }
1976 if_unlock(t);
1977 }
1978 mutex_unlock(&pktgen_thread_lock);
1979 }
1980
pktgen_device_event(struct notifier_block * unused,unsigned long event,void * ptr)1981 static int pktgen_device_event(struct notifier_block *unused,
1982 unsigned long event, void *ptr)
1983 {
1984 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1985 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id);
1986
1987 if (pn->pktgen_exiting)
1988 return NOTIFY_DONE;
1989
1990 /* It is OK that we do not hold the group lock right now,
1991 * as we run under the RTNL lock.
1992 */
1993
1994 switch (event) {
1995 case NETDEV_CHANGENAME:
1996 pktgen_change_name(pn, dev);
1997 break;
1998
1999 case NETDEV_UNREGISTER:
2000 pktgen_mark_device(pn, dev->name);
2001 break;
2002 }
2003
2004 return NOTIFY_DONE;
2005 }
2006
pktgen_dev_get_by_name(const struct pktgen_net * pn,struct pktgen_dev * pkt_dev,const char * ifname)2007 static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn,
2008 struct pktgen_dev *pkt_dev,
2009 const char *ifname)
2010 {
2011 char b[IFNAMSIZ+5];
2012 int i;
2013
2014 for (i = 0; ifname[i] != '@'; i++) {
2015 if (i == IFNAMSIZ)
2016 break;
2017
2018 b[i] = ifname[i];
2019 }
2020 b[i] = 0;
2021
2022 return dev_get_by_name(pn->net, b);
2023 }
2024
2025
2026 /* Associate pktgen_dev with a device. */
2027
pktgen_setup_dev(const struct pktgen_net * pn,struct pktgen_dev * pkt_dev,const char * ifname)2028 static int pktgen_setup_dev(const struct pktgen_net *pn,
2029 struct pktgen_dev *pkt_dev, const char *ifname)
2030 {
2031 struct net_device *odev;
2032 int err;
2033
2034 /* Clean old setups */
2035 if (pkt_dev->odev) {
2036 dev_put(pkt_dev->odev);
2037 pkt_dev->odev = NULL;
2038 }
2039
2040 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname);
2041 if (!odev) {
2042 pr_err("no such netdevice: \"%s\"\n", ifname);
2043 return -ENODEV;
2044 }
2045
2046 if (odev->type != ARPHRD_ETHER) {
2047 pr_err("not an ethernet device: \"%s\"\n", ifname);
2048 err = -EINVAL;
2049 } else if (!netif_running(odev)) {
2050 pr_err("device is down: \"%s\"\n", ifname);
2051 err = -ENETDOWN;
2052 } else {
2053 pkt_dev->odev = odev;
2054 return 0;
2055 }
2056
2057 dev_put(odev);
2058 return err;
2059 }
2060
2061 /* Read pkt_dev from the interface and set up internal pktgen_dev
2062 * structure to have the right information to create/send packets
2063 */
pktgen_setup_inject(struct pktgen_dev * pkt_dev)2064 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2065 {
2066 int ntxq;
2067
2068 if (!pkt_dev->odev) {
2069 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2070 sprintf(pkt_dev->result,
2071 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2072 return;
2073 }
2074
2075 /* make sure that we don't pick a non-existing transmit queue */
2076 ntxq = pkt_dev->odev->real_num_tx_queues;
2077
2078 if (ntxq <= pkt_dev->queue_map_min) {
2079 pr_warn("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2080 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2081 pkt_dev->odevname);
2082 pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2083 }
2084 if (pkt_dev->queue_map_max >= ntxq) {
2085 pr_warn("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2086 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2087 pkt_dev->odevname);
2088 pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2089 }
2090
2091 /* Default to the interface's mac if not explicitly set. */
2092
2093 if (is_zero_ether_addr(pkt_dev->src_mac))
2094 ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr);
2095
2096 /* Set up Dest MAC */
2097 ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac);
2098
2099 if (pkt_dev->flags & F_IPV6) {
2100 int i, set = 0, err = 1;
2101 struct inet6_dev *idev;
2102
2103 if (pkt_dev->min_pkt_size == 0) {
2104 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
2105 + sizeof(struct udphdr)
2106 + sizeof(struct pktgen_hdr)
2107 + pkt_dev->pkt_overhead;
2108 }
2109
2110 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2111 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2112 set = 1;
2113 break;
2114 }
2115
2116 if (!set) {
2117
2118 /*
2119 * Use linklevel address if unconfigured.
2120 *
2121 * use ipv6_get_lladdr if/when it's get exported
2122 */
2123
2124 rcu_read_lock();
2125 idev = __in6_dev_get(pkt_dev->odev);
2126 if (idev) {
2127 struct inet6_ifaddr *ifp;
2128
2129 read_lock_bh(&idev->lock);
2130 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2131 if ((ifp->scope & IFA_LINK) &&
2132 !(ifp->flags & IFA_F_TENTATIVE)) {
2133 pkt_dev->cur_in6_saddr = ifp->addr;
2134 err = 0;
2135 break;
2136 }
2137 }
2138 read_unlock_bh(&idev->lock);
2139 }
2140 rcu_read_unlock();
2141 if (err)
2142 pr_err("ERROR: IPv6 link address not available\n");
2143 }
2144 } else {
2145 if (pkt_dev->min_pkt_size == 0) {
2146 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
2147 + sizeof(struct udphdr)
2148 + sizeof(struct pktgen_hdr)
2149 + pkt_dev->pkt_overhead;
2150 }
2151
2152 pkt_dev->saddr_min = 0;
2153 pkt_dev->saddr_max = 0;
2154 if (strlen(pkt_dev->src_min) == 0) {
2155
2156 struct in_device *in_dev;
2157
2158 rcu_read_lock();
2159 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2160 if (in_dev) {
2161 if (in_dev->ifa_list) {
2162 pkt_dev->saddr_min =
2163 in_dev->ifa_list->ifa_address;
2164 pkt_dev->saddr_max = pkt_dev->saddr_min;
2165 }
2166 }
2167 rcu_read_unlock();
2168 } else {
2169 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2170 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2171 }
2172
2173 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2174 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2175 }
2176 /* Initialize current values. */
2177 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2178 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
2179 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
2180
2181 pkt_dev->cur_dst_mac_offset = 0;
2182 pkt_dev->cur_src_mac_offset = 0;
2183 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2184 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2185 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2186 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2187 pkt_dev->nflows = 0;
2188 }
2189
2190
spin(struct pktgen_dev * pkt_dev,ktime_t spin_until)2191 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2192 {
2193 ktime_t start_time, end_time;
2194 s64 remaining;
2195 struct hrtimer_sleeper t;
2196
2197 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2198 hrtimer_set_expires(&t.timer, spin_until);
2199
2200 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2201 if (remaining <= 0) {
2202 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2203 return;
2204 }
2205
2206 start_time = ktime_get();
2207 if (remaining < 100000) {
2208 /* for small delays (<100us), just loop until limit is reached */
2209 do {
2210 end_time = ktime_get();
2211 } while (ktime_compare(end_time, spin_until) < 0);
2212 } else {
2213 /* see do_nanosleep */
2214 hrtimer_init_sleeper(&t, current);
2215 do {
2216 set_current_state(TASK_INTERRUPTIBLE);
2217 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2218 if (!hrtimer_active(&t.timer))
2219 t.task = NULL;
2220
2221 if (likely(t.task))
2222 schedule();
2223
2224 hrtimer_cancel(&t.timer);
2225 } while (t.task && pkt_dev->running && !signal_pending(current));
2226 __set_current_state(TASK_RUNNING);
2227 end_time = ktime_get();
2228 }
2229
2230 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2231 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2232 }
2233
set_pkt_overhead(struct pktgen_dev * pkt_dev)2234 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2235 {
2236 pkt_dev->pkt_overhead = 0;
2237 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2238 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2239 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2240 }
2241
f_seen(const struct pktgen_dev * pkt_dev,int flow)2242 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2243 {
2244 return !!(pkt_dev->flows[flow].flags & F_INIT);
2245 }
2246
f_pick(struct pktgen_dev * pkt_dev)2247 static inline int f_pick(struct pktgen_dev *pkt_dev)
2248 {
2249 int flow = pkt_dev->curfl;
2250
2251 if (pkt_dev->flags & F_FLOW_SEQ) {
2252 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2253 /* reset time */
2254 pkt_dev->flows[flow].count = 0;
2255 pkt_dev->flows[flow].flags = 0;
2256 pkt_dev->curfl += 1;
2257 if (pkt_dev->curfl >= pkt_dev->cflows)
2258 pkt_dev->curfl = 0; /*reset */
2259 }
2260 } else {
2261 flow = prandom_u32() % pkt_dev->cflows;
2262 pkt_dev->curfl = flow;
2263
2264 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2265 pkt_dev->flows[flow].count = 0;
2266 pkt_dev->flows[flow].flags = 0;
2267 }
2268 }
2269
2270 return pkt_dev->curfl;
2271 }
2272
2273
2274 #ifdef CONFIG_XFRM
2275 /* If there was already an IPSEC SA, we keep it as is, else
2276 * we go look for it ...
2277 */
2278 #define DUMMY_MARK 0
get_ipsec_sa(struct pktgen_dev * pkt_dev,int flow)2279 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2280 {
2281 struct xfrm_state *x = pkt_dev->flows[flow].x;
2282 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
2283 if (!x) {
2284
2285 if (pkt_dev->spi) {
2286 /* We need as quick as possible to find the right SA
2287 * Searching with minimum criteria to archieve this.
2288 */
2289 x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET);
2290 } else {
2291 /* slow path: we dont already have xfrm_state */
2292 x = xfrm_stateonly_find(pn->net, DUMMY_MARK,
2293 (xfrm_address_t *)&pkt_dev->cur_daddr,
2294 (xfrm_address_t *)&pkt_dev->cur_saddr,
2295 AF_INET,
2296 pkt_dev->ipsmode,
2297 pkt_dev->ipsproto, 0);
2298 }
2299 if (x) {
2300 pkt_dev->flows[flow].x = x;
2301 set_pkt_overhead(pkt_dev);
2302 pkt_dev->pkt_overhead += x->props.header_len;
2303 }
2304
2305 }
2306 }
2307 #endif
set_cur_queue_map(struct pktgen_dev * pkt_dev)2308 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2309 {
2310
2311 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2312 pkt_dev->cur_queue_map = smp_processor_id();
2313
2314 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2315 __u16 t;
2316 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2317 t = prandom_u32() %
2318 (pkt_dev->queue_map_max -
2319 pkt_dev->queue_map_min + 1)
2320 + pkt_dev->queue_map_min;
2321 } else {
2322 t = pkt_dev->cur_queue_map + 1;
2323 if (t > pkt_dev->queue_map_max)
2324 t = pkt_dev->queue_map_min;
2325 }
2326 pkt_dev->cur_queue_map = t;
2327 }
2328 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2329 }
2330
2331 /* Increment/randomize headers according to flags and current values
2332 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2333 */
mod_cur_headers(struct pktgen_dev * pkt_dev)2334 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2335 {
2336 __u32 imn;
2337 __u32 imx;
2338 int flow = 0;
2339
2340 if (pkt_dev->cflows)
2341 flow = f_pick(pkt_dev);
2342
2343 /* Deal with source MAC */
2344 if (pkt_dev->src_mac_count > 1) {
2345 __u32 mc;
2346 __u32 tmp;
2347
2348 if (pkt_dev->flags & F_MACSRC_RND)
2349 mc = prandom_u32() % pkt_dev->src_mac_count;
2350 else {
2351 mc = pkt_dev->cur_src_mac_offset++;
2352 if (pkt_dev->cur_src_mac_offset >=
2353 pkt_dev->src_mac_count)
2354 pkt_dev->cur_src_mac_offset = 0;
2355 }
2356
2357 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2358 pkt_dev->hh[11] = tmp;
2359 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2360 pkt_dev->hh[10] = tmp;
2361 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2362 pkt_dev->hh[9] = tmp;
2363 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2364 pkt_dev->hh[8] = tmp;
2365 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2366 pkt_dev->hh[7] = tmp;
2367 }
2368
2369 /* Deal with Destination MAC */
2370 if (pkt_dev->dst_mac_count > 1) {
2371 __u32 mc;
2372 __u32 tmp;
2373
2374 if (pkt_dev->flags & F_MACDST_RND)
2375 mc = prandom_u32() % pkt_dev->dst_mac_count;
2376
2377 else {
2378 mc = pkt_dev->cur_dst_mac_offset++;
2379 if (pkt_dev->cur_dst_mac_offset >=
2380 pkt_dev->dst_mac_count) {
2381 pkt_dev->cur_dst_mac_offset = 0;
2382 }
2383 }
2384
2385 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2386 pkt_dev->hh[5] = tmp;
2387 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2388 pkt_dev->hh[4] = tmp;
2389 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2390 pkt_dev->hh[3] = tmp;
2391 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2392 pkt_dev->hh[2] = tmp;
2393 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2394 pkt_dev->hh[1] = tmp;
2395 }
2396
2397 if (pkt_dev->flags & F_MPLS_RND) {
2398 unsigned int i;
2399 for (i = 0; i < pkt_dev->nr_labels; i++)
2400 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2401 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2402 ((__force __be32)prandom_u32() &
2403 htonl(0x000fffff));
2404 }
2405
2406 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2407 pkt_dev->vlan_id = prandom_u32() & (4096 - 1);
2408 }
2409
2410 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2411 pkt_dev->svlan_id = prandom_u32() & (4096 - 1);
2412 }
2413
2414 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2415 if (pkt_dev->flags & F_UDPSRC_RND)
2416 pkt_dev->cur_udp_src = prandom_u32() %
2417 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2418 + pkt_dev->udp_src_min;
2419
2420 else {
2421 pkt_dev->cur_udp_src++;
2422 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2423 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2424 }
2425 }
2426
2427 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2428 if (pkt_dev->flags & F_UDPDST_RND) {
2429 pkt_dev->cur_udp_dst = prandom_u32() %
2430 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2431 + pkt_dev->udp_dst_min;
2432 } else {
2433 pkt_dev->cur_udp_dst++;
2434 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2435 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2436 }
2437 }
2438
2439 if (!(pkt_dev->flags & F_IPV6)) {
2440
2441 imn = ntohl(pkt_dev->saddr_min);
2442 imx = ntohl(pkt_dev->saddr_max);
2443 if (imn < imx) {
2444 __u32 t;
2445 if (pkt_dev->flags & F_IPSRC_RND)
2446 t = prandom_u32() % (imx - imn) + imn;
2447 else {
2448 t = ntohl(pkt_dev->cur_saddr);
2449 t++;
2450 if (t > imx)
2451 t = imn;
2452
2453 }
2454 pkt_dev->cur_saddr = htonl(t);
2455 }
2456
2457 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2458 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2459 } else {
2460 imn = ntohl(pkt_dev->daddr_min);
2461 imx = ntohl(pkt_dev->daddr_max);
2462 if (imn < imx) {
2463 __u32 t;
2464 __be32 s;
2465 if (pkt_dev->flags & F_IPDST_RND) {
2466
2467 do {
2468 t = prandom_u32() %
2469 (imx - imn) + imn;
2470 s = htonl(t);
2471 } while (ipv4_is_loopback(s) ||
2472 ipv4_is_multicast(s) ||
2473 ipv4_is_lbcast(s) ||
2474 ipv4_is_zeronet(s) ||
2475 ipv4_is_local_multicast(s));
2476 pkt_dev->cur_daddr = s;
2477 } else {
2478 t = ntohl(pkt_dev->cur_daddr);
2479 t++;
2480 if (t > imx) {
2481 t = imn;
2482 }
2483 pkt_dev->cur_daddr = htonl(t);
2484 }
2485 }
2486 if (pkt_dev->cflows) {
2487 pkt_dev->flows[flow].flags |= F_INIT;
2488 pkt_dev->flows[flow].cur_daddr =
2489 pkt_dev->cur_daddr;
2490 #ifdef CONFIG_XFRM
2491 if (pkt_dev->flags & F_IPSEC_ON)
2492 get_ipsec_sa(pkt_dev, flow);
2493 #endif
2494 pkt_dev->nflows++;
2495 }
2496 }
2497 } else { /* IPV6 * */
2498
2499 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
2500 int i;
2501
2502 /* Only random destinations yet */
2503
2504 for (i = 0; i < 4; i++) {
2505 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2506 (((__force __be32)prandom_u32() |
2507 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2508 pkt_dev->max_in6_daddr.s6_addr32[i]);
2509 }
2510 }
2511 }
2512
2513 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2514 __u32 t;
2515 if (pkt_dev->flags & F_TXSIZE_RND) {
2516 t = prandom_u32() %
2517 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2518 + pkt_dev->min_pkt_size;
2519 } else {
2520 t = pkt_dev->cur_pkt_size + 1;
2521 if (t > pkt_dev->max_pkt_size)
2522 t = pkt_dev->min_pkt_size;
2523 }
2524 pkt_dev->cur_pkt_size = t;
2525 }
2526
2527 set_cur_queue_map(pkt_dev);
2528
2529 pkt_dev->flows[flow].count++;
2530 }
2531
2532
2533 #ifdef CONFIG_XFRM
2534 static u32 pktgen_dst_metrics[RTAX_MAX + 1] = {
2535
2536 [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */
2537 };
2538
pktgen_output_ipsec(struct sk_buff * skb,struct pktgen_dev * pkt_dev)2539 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2540 {
2541 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2542 int err = 0;
2543 struct net *net = dev_net(pkt_dev->odev);
2544
2545 if (!x)
2546 return 0;
2547 /* XXX: we dont support tunnel mode for now until
2548 * we resolve the dst issue */
2549 if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0))
2550 return 0;
2551
2552 /* But when user specify an valid SPI, transformation
2553 * supports both transport/tunnel mode + ESP/AH type.
2554 */
2555 if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0))
2556 skb->_skb_refdst = (unsigned long)&pkt_dev->dst | SKB_DST_NOREF;
2557
2558 rcu_read_lock_bh();
2559 err = x->outer_mode->output(x, skb);
2560 rcu_read_unlock_bh();
2561 if (err) {
2562 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR);
2563 goto error;
2564 }
2565 err = x->type->output(x, skb);
2566 if (err) {
2567 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR);
2568 goto error;
2569 }
2570 spin_lock_bh(&x->lock);
2571 x->curlft.bytes += skb->len;
2572 x->curlft.packets++;
2573 spin_unlock_bh(&x->lock);
2574 error:
2575 return err;
2576 }
2577
free_SAs(struct pktgen_dev * pkt_dev)2578 static void free_SAs(struct pktgen_dev *pkt_dev)
2579 {
2580 if (pkt_dev->cflows) {
2581 /* let go of the SAs if we have them */
2582 int i;
2583 for (i = 0; i < pkt_dev->cflows; i++) {
2584 struct xfrm_state *x = pkt_dev->flows[i].x;
2585 if (x) {
2586 xfrm_state_put(x);
2587 pkt_dev->flows[i].x = NULL;
2588 }
2589 }
2590 }
2591 }
2592
process_ipsec(struct pktgen_dev * pkt_dev,struct sk_buff * skb,__be16 protocol)2593 static int process_ipsec(struct pktgen_dev *pkt_dev,
2594 struct sk_buff *skb, __be16 protocol)
2595 {
2596 if (pkt_dev->flags & F_IPSEC_ON) {
2597 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2598 int nhead = 0;
2599 if (x) {
2600 int ret;
2601 __u8 *eth;
2602 struct iphdr *iph;
2603
2604 nhead = x->props.header_len - skb_headroom(skb);
2605 if (nhead > 0) {
2606 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2607 if (ret < 0) {
2608 pr_err("Error expanding ipsec packet %d\n",
2609 ret);
2610 goto err;
2611 }
2612 }
2613
2614 /* ipsec is not expecting ll header */
2615 skb_pull(skb, ETH_HLEN);
2616 ret = pktgen_output_ipsec(skb, pkt_dev);
2617 if (ret) {
2618 pr_err("Error creating ipsec packet %d\n", ret);
2619 goto err;
2620 }
2621 /* restore ll */
2622 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2623 memcpy(eth, pkt_dev->hh, 12);
2624 *(u16 *) ð[12] = protocol;
2625
2626 /* Update IPv4 header len as well as checksum value */
2627 iph = ip_hdr(skb);
2628 iph->tot_len = htons(skb->len - ETH_HLEN);
2629 ip_send_check(iph);
2630 }
2631 }
2632 return 1;
2633 err:
2634 kfree_skb(skb);
2635 return 0;
2636 }
2637 #endif
2638
mpls_push(__be32 * mpls,struct pktgen_dev * pkt_dev)2639 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2640 {
2641 unsigned int i;
2642 for (i = 0; i < pkt_dev->nr_labels; i++)
2643 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2644
2645 mpls--;
2646 *mpls |= MPLS_STACK_BOTTOM;
2647 }
2648
build_tci(unsigned int id,unsigned int cfi,unsigned int prio)2649 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2650 unsigned int prio)
2651 {
2652 return htons(id | (cfi << 12) | (prio << 13));
2653 }
2654
pktgen_finalize_skb(struct pktgen_dev * pkt_dev,struct sk_buff * skb,int datalen)2655 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2656 int datalen)
2657 {
2658 struct timeval timestamp;
2659 struct pktgen_hdr *pgh;
2660
2661 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh));
2662 datalen -= sizeof(*pgh);
2663
2664 if (pkt_dev->nfrags <= 0) {
2665 memset(skb_put(skb, datalen), 0, datalen);
2666 } else {
2667 int frags = pkt_dev->nfrags;
2668 int i, len;
2669 int frag_len;
2670
2671
2672 if (frags > MAX_SKB_FRAGS)
2673 frags = MAX_SKB_FRAGS;
2674 len = datalen - frags * PAGE_SIZE;
2675 if (len > 0) {
2676 memset(skb_put(skb, len), 0, len);
2677 datalen = frags * PAGE_SIZE;
2678 }
2679
2680 i = 0;
2681 frag_len = (datalen/frags) < PAGE_SIZE ?
2682 (datalen/frags) : PAGE_SIZE;
2683 while (datalen > 0) {
2684 if (unlikely(!pkt_dev->page)) {
2685 int node = numa_node_id();
2686
2687 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2688 node = pkt_dev->node;
2689 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2690 if (!pkt_dev->page)
2691 break;
2692 }
2693 get_page(pkt_dev->page);
2694 skb_frag_set_page(skb, i, pkt_dev->page);
2695 skb_shinfo(skb)->frags[i].page_offset = 0;
2696 /*last fragment, fill rest of data*/
2697 if (i == (frags - 1))
2698 skb_frag_size_set(&skb_shinfo(skb)->frags[i],
2699 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
2700 else
2701 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
2702 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2703 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2704 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2705 i++;
2706 skb_shinfo(skb)->nr_frags = i;
2707 }
2708 }
2709
2710 /* Stamp the time, and sequence number,
2711 * convert them to network byte order
2712 */
2713 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2714 pgh->seq_num = htonl(pkt_dev->seq_num);
2715
2716 if (pkt_dev->flags & F_NO_TIMESTAMP) {
2717 pgh->tv_sec = 0;
2718 pgh->tv_usec = 0;
2719 } else {
2720 do_gettimeofday(×tamp);
2721 pgh->tv_sec = htonl(timestamp.tv_sec);
2722 pgh->tv_usec = htonl(timestamp.tv_usec);
2723 }
2724 }
2725
pktgen_alloc_skb(struct net_device * dev,struct pktgen_dev * pkt_dev,unsigned int extralen)2726 static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
2727 struct pktgen_dev *pkt_dev,
2728 unsigned int extralen)
2729 {
2730 struct sk_buff *skb = NULL;
2731 unsigned int size = pkt_dev->cur_pkt_size + 64 + extralen +
2732 pkt_dev->pkt_overhead;
2733
2734 if (pkt_dev->flags & F_NODE) {
2735 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id();
2736
2737 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node);
2738 if (likely(skb)) {
2739 skb_reserve(skb, NET_SKB_PAD);
2740 skb->dev = dev;
2741 }
2742 } else {
2743 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
2744 }
2745
2746 return skb;
2747 }
2748
fill_packet_ipv4(struct net_device * odev,struct pktgen_dev * pkt_dev)2749 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2750 struct pktgen_dev *pkt_dev)
2751 {
2752 struct sk_buff *skb = NULL;
2753 __u8 *eth;
2754 struct udphdr *udph;
2755 int datalen, iplen;
2756 struct iphdr *iph;
2757 __be16 protocol = htons(ETH_P_IP);
2758 __be32 *mpls;
2759 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2760 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2761 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2762 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2763 u16 queue_map;
2764
2765 if (pkt_dev->nr_labels)
2766 protocol = htons(ETH_P_MPLS_UC);
2767
2768 if (pkt_dev->vlan_id != 0xffff)
2769 protocol = htons(ETH_P_8021Q);
2770
2771 /* Update any of the values, used when we're incrementing various
2772 * fields.
2773 */
2774 mod_cur_headers(pkt_dev);
2775 queue_map = pkt_dev->cur_queue_map;
2776
2777 datalen = (odev->hard_header_len + 16) & ~0xf;
2778
2779 skb = pktgen_alloc_skb(odev, pkt_dev, datalen);
2780 if (!skb) {
2781 sprintf(pkt_dev->result, "No memory");
2782 return NULL;
2783 }
2784
2785 prefetchw(skb->data);
2786 skb_reserve(skb, datalen);
2787
2788 /* Reserve for ethernet and IP header */
2789 eth = (__u8 *) skb_push(skb, 14);
2790 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2791 if (pkt_dev->nr_labels)
2792 mpls_push(mpls, pkt_dev);
2793
2794 if (pkt_dev->vlan_id != 0xffff) {
2795 if (pkt_dev->svlan_id != 0xffff) {
2796 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2797 *svlan_tci = build_tci(pkt_dev->svlan_id,
2798 pkt_dev->svlan_cfi,
2799 pkt_dev->svlan_p);
2800 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2801 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2802 }
2803 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2804 *vlan_tci = build_tci(pkt_dev->vlan_id,
2805 pkt_dev->vlan_cfi,
2806 pkt_dev->vlan_p);
2807 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2808 *vlan_encapsulated_proto = htons(ETH_P_IP);
2809 }
2810
2811 skb_set_mac_header(skb, 0);
2812 skb_set_network_header(skb, skb->len);
2813 iph = (struct iphdr *) skb_put(skb, sizeof(struct iphdr));
2814
2815 skb_set_transport_header(skb, skb->len);
2816 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2817 skb_set_queue_mapping(skb, queue_map);
2818 skb->priority = pkt_dev->skb_priority;
2819
2820 memcpy(eth, pkt_dev->hh, 12);
2821 *(__be16 *) & eth[12] = protocol;
2822
2823 /* Eth + IPh + UDPh + mpls */
2824 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2825 pkt_dev->pkt_overhead;
2826 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
2827 datalen = sizeof(struct pktgen_hdr);
2828
2829 udph->source = htons(pkt_dev->cur_udp_src);
2830 udph->dest = htons(pkt_dev->cur_udp_dst);
2831 udph->len = htons(datalen + 8); /* DATA + udphdr */
2832 udph->check = 0;
2833
2834 iph->ihl = 5;
2835 iph->version = 4;
2836 iph->ttl = 32;
2837 iph->tos = pkt_dev->tos;
2838 iph->protocol = IPPROTO_UDP; /* UDP */
2839 iph->saddr = pkt_dev->cur_saddr;
2840 iph->daddr = pkt_dev->cur_daddr;
2841 iph->id = htons(pkt_dev->ip_id);
2842 pkt_dev->ip_id++;
2843 iph->frag_off = 0;
2844 iplen = 20 + 8 + datalen;
2845 iph->tot_len = htons(iplen);
2846 ip_send_check(iph);
2847 skb->protocol = protocol;
2848 skb->dev = odev;
2849 skb->pkt_type = PACKET_HOST;
2850
2851 pktgen_finalize_skb(pkt_dev, skb, datalen);
2852
2853 if (!(pkt_dev->flags & F_UDPCSUM)) {
2854 skb->ip_summed = CHECKSUM_NONE;
2855 } else if (odev->features & NETIF_F_V4_CSUM) {
2856 skb->ip_summed = CHECKSUM_PARTIAL;
2857 skb->csum = 0;
2858 udp4_hwcsum(skb, iph->saddr, iph->daddr);
2859 } else {
2860 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), datalen + 8, 0);
2861
2862 /* add protocol-dependent pseudo-header */
2863 udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
2864 datalen + 8, IPPROTO_UDP, csum);
2865
2866 if (udph->check == 0)
2867 udph->check = CSUM_MANGLED_0;
2868 }
2869
2870 #ifdef CONFIG_XFRM
2871 if (!process_ipsec(pkt_dev, skb, protocol))
2872 return NULL;
2873 #endif
2874
2875 return skb;
2876 }
2877
fill_packet_ipv6(struct net_device * odev,struct pktgen_dev * pkt_dev)2878 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2879 struct pktgen_dev *pkt_dev)
2880 {
2881 struct sk_buff *skb = NULL;
2882 __u8 *eth;
2883 struct udphdr *udph;
2884 int datalen, udplen;
2885 struct ipv6hdr *iph;
2886 __be16 protocol = htons(ETH_P_IPV6);
2887 __be32 *mpls;
2888 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2889 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2890 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2891 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2892 u16 queue_map;
2893
2894 if (pkt_dev->nr_labels)
2895 protocol = htons(ETH_P_MPLS_UC);
2896
2897 if (pkt_dev->vlan_id != 0xffff)
2898 protocol = htons(ETH_P_8021Q);
2899
2900 /* Update any of the values, used when we're incrementing various
2901 * fields.
2902 */
2903 mod_cur_headers(pkt_dev);
2904 queue_map = pkt_dev->cur_queue_map;
2905
2906 skb = pktgen_alloc_skb(odev, pkt_dev, 16);
2907 if (!skb) {
2908 sprintf(pkt_dev->result, "No memory");
2909 return NULL;
2910 }
2911
2912 prefetchw(skb->data);
2913 skb_reserve(skb, 16);
2914
2915 /* Reserve for ethernet and IP header */
2916 eth = (__u8 *) skb_push(skb, 14);
2917 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2918 if (pkt_dev->nr_labels)
2919 mpls_push(mpls, pkt_dev);
2920
2921 if (pkt_dev->vlan_id != 0xffff) {
2922 if (pkt_dev->svlan_id != 0xffff) {
2923 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2924 *svlan_tci = build_tci(pkt_dev->svlan_id,
2925 pkt_dev->svlan_cfi,
2926 pkt_dev->svlan_p);
2927 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2928 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2929 }
2930 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2931 *vlan_tci = build_tci(pkt_dev->vlan_id,
2932 pkt_dev->vlan_cfi,
2933 pkt_dev->vlan_p);
2934 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2935 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2936 }
2937
2938 skb_set_mac_header(skb, 0);
2939 skb_set_network_header(skb, skb->len);
2940 iph = (struct ipv6hdr *) skb_put(skb, sizeof(struct ipv6hdr));
2941
2942 skb_set_transport_header(skb, skb->len);
2943 udph = (struct udphdr *) skb_put(skb, sizeof(struct udphdr));
2944 skb_set_queue_mapping(skb, queue_map);
2945 skb->priority = pkt_dev->skb_priority;
2946
2947 memcpy(eth, pkt_dev->hh, 12);
2948 *(__be16 *) ð[12] = protocol;
2949
2950 /* Eth + IPh + UDPh + mpls */
2951 datalen = pkt_dev->cur_pkt_size - 14 -
2952 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
2953 pkt_dev->pkt_overhead;
2954
2955 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
2956 datalen = sizeof(struct pktgen_hdr);
2957 net_info_ratelimited("increased datalen to %d\n", datalen);
2958 }
2959
2960 udplen = datalen + sizeof(struct udphdr);
2961 udph->source = htons(pkt_dev->cur_udp_src);
2962 udph->dest = htons(pkt_dev->cur_udp_dst);
2963 udph->len = htons(udplen);
2964 udph->check = 0;
2965
2966 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
2967
2968 if (pkt_dev->traffic_class) {
2969 /* Version + traffic class + flow (0) */
2970 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
2971 }
2972
2973 iph->hop_limit = 32;
2974
2975 iph->payload_len = htons(udplen);
2976 iph->nexthdr = IPPROTO_UDP;
2977
2978 iph->daddr = pkt_dev->cur_in6_daddr;
2979 iph->saddr = pkt_dev->cur_in6_saddr;
2980
2981 skb->protocol = protocol;
2982 skb->dev = odev;
2983 skb->pkt_type = PACKET_HOST;
2984
2985 pktgen_finalize_skb(pkt_dev, skb, datalen);
2986
2987 if (!(pkt_dev->flags & F_UDPCSUM)) {
2988 skb->ip_summed = CHECKSUM_NONE;
2989 } else if (odev->features & NETIF_F_V6_CSUM) {
2990 skb->ip_summed = CHECKSUM_PARTIAL;
2991 skb->csum_start = skb_transport_header(skb) - skb->head;
2992 skb->csum_offset = offsetof(struct udphdr, check);
2993 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0);
2994 } else {
2995 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), udplen, 0);
2996
2997 /* add protocol-dependent pseudo-header */
2998 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum);
2999
3000 if (udph->check == 0)
3001 udph->check = CSUM_MANGLED_0;
3002 }
3003
3004 return skb;
3005 }
3006
fill_packet(struct net_device * odev,struct pktgen_dev * pkt_dev)3007 static struct sk_buff *fill_packet(struct net_device *odev,
3008 struct pktgen_dev *pkt_dev)
3009 {
3010 if (pkt_dev->flags & F_IPV6)
3011 return fill_packet_ipv6(odev, pkt_dev);
3012 else
3013 return fill_packet_ipv4(odev, pkt_dev);
3014 }
3015
pktgen_clear_counters(struct pktgen_dev * pkt_dev)3016 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3017 {
3018 pkt_dev->seq_num = 1;
3019 pkt_dev->idle_acc = 0;
3020 pkt_dev->sofar = 0;
3021 pkt_dev->tx_bytes = 0;
3022 pkt_dev->errors = 0;
3023 }
3024
3025 /* Set up structure for sending pkts, clear counters */
3026
pktgen_run(struct pktgen_thread * t)3027 static void pktgen_run(struct pktgen_thread *t)
3028 {
3029 struct pktgen_dev *pkt_dev;
3030 int started = 0;
3031
3032 func_enter();
3033
3034 rcu_read_lock();
3035 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3036
3037 /*
3038 * setup odev and create initial packet.
3039 */
3040 pktgen_setup_inject(pkt_dev);
3041
3042 if (pkt_dev->odev) {
3043 pktgen_clear_counters(pkt_dev);
3044 pkt_dev->skb = NULL;
3045 pkt_dev->started_at = pkt_dev->next_tx = ktime_get();
3046
3047 set_pkt_overhead(pkt_dev);
3048
3049 strcpy(pkt_dev->result, "Starting");
3050 pkt_dev->running = 1; /* Cranke yeself! */
3051 started++;
3052 } else
3053 strcpy(pkt_dev->result, "Error starting");
3054 }
3055 rcu_read_unlock();
3056 if (started)
3057 t->control &= ~(T_STOP);
3058 }
3059
pktgen_stop_all_threads_ifs(struct pktgen_net * pn)3060 static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn)
3061 {
3062 struct pktgen_thread *t;
3063
3064 func_enter();
3065
3066 mutex_lock(&pktgen_thread_lock);
3067
3068 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3069 t->control |= T_STOP;
3070
3071 mutex_unlock(&pktgen_thread_lock);
3072 }
3073
thread_is_running(const struct pktgen_thread * t)3074 static int thread_is_running(const struct pktgen_thread *t)
3075 {
3076 const struct pktgen_dev *pkt_dev;
3077
3078 rcu_read_lock();
3079 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
3080 if (pkt_dev->running) {
3081 rcu_read_unlock();
3082 return 1;
3083 }
3084 rcu_read_unlock();
3085 return 0;
3086 }
3087
pktgen_wait_thread_run(struct pktgen_thread * t)3088 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3089 {
3090 while (thread_is_running(t)) {
3091
3092 msleep_interruptible(100);
3093
3094 if (signal_pending(current))
3095 goto signal;
3096 }
3097 return 1;
3098 signal:
3099 return 0;
3100 }
3101
pktgen_wait_all_threads_run(struct pktgen_net * pn)3102 static int pktgen_wait_all_threads_run(struct pktgen_net *pn)
3103 {
3104 struct pktgen_thread *t;
3105 int sig = 1;
3106
3107 mutex_lock(&pktgen_thread_lock);
3108
3109 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
3110 sig = pktgen_wait_thread_run(t);
3111 if (sig == 0)
3112 break;
3113 }
3114
3115 if (sig == 0)
3116 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3117 t->control |= (T_STOP);
3118
3119 mutex_unlock(&pktgen_thread_lock);
3120 return sig;
3121 }
3122
pktgen_run_all_threads(struct pktgen_net * pn)3123 static void pktgen_run_all_threads(struct pktgen_net *pn)
3124 {
3125 struct pktgen_thread *t;
3126
3127 func_enter();
3128
3129 mutex_lock(&pktgen_thread_lock);
3130
3131 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3132 t->control |= (T_RUN);
3133
3134 mutex_unlock(&pktgen_thread_lock);
3135
3136 /* Propagate thread->control */
3137 schedule_timeout_interruptible(msecs_to_jiffies(125));
3138
3139 pktgen_wait_all_threads_run(pn);
3140 }
3141
pktgen_reset_all_threads(struct pktgen_net * pn)3142 static void pktgen_reset_all_threads(struct pktgen_net *pn)
3143 {
3144 struct pktgen_thread *t;
3145
3146 func_enter();
3147
3148 mutex_lock(&pktgen_thread_lock);
3149
3150 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3151 t->control |= (T_REMDEVALL);
3152
3153 mutex_unlock(&pktgen_thread_lock);
3154
3155 /* Propagate thread->control */
3156 schedule_timeout_interruptible(msecs_to_jiffies(125));
3157
3158 pktgen_wait_all_threads_run(pn);
3159 }
3160
show_results(struct pktgen_dev * pkt_dev,int nr_frags)3161 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3162 {
3163 __u64 bps, mbps, pps;
3164 char *p = pkt_dev->result;
3165 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3166 pkt_dev->started_at);
3167 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3168
3169 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3170 (unsigned long long)ktime_to_us(elapsed),
3171 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3172 (unsigned long long)ktime_to_us(idle),
3173 (unsigned long long)pkt_dev->sofar,
3174 pkt_dev->cur_pkt_size, nr_frags);
3175
3176 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3177 ktime_to_ns(elapsed));
3178
3179 bps = pps * 8 * pkt_dev->cur_pkt_size;
3180
3181 mbps = bps;
3182 do_div(mbps, 1000000);
3183 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3184 (unsigned long long)pps,
3185 (unsigned long long)mbps,
3186 (unsigned long long)bps,
3187 (unsigned long long)pkt_dev->errors);
3188 }
3189
3190 /* Set stopped-at timer, remove from running list, do counters & statistics */
pktgen_stop_device(struct pktgen_dev * pkt_dev)3191 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3192 {
3193 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3194
3195 if (!pkt_dev->running) {
3196 pr_warn("interface: %s is already stopped\n",
3197 pkt_dev->odevname);
3198 return -EINVAL;
3199 }
3200
3201 pkt_dev->running = 0;
3202 kfree_skb(pkt_dev->skb);
3203 pkt_dev->skb = NULL;
3204 pkt_dev->stopped_at = ktime_get();
3205
3206 show_results(pkt_dev, nr_frags);
3207
3208 return 0;
3209 }
3210
next_to_run(struct pktgen_thread * t)3211 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3212 {
3213 struct pktgen_dev *pkt_dev, *best = NULL;
3214
3215 rcu_read_lock();
3216 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3217 if (!pkt_dev->running)
3218 continue;
3219 if (best == NULL)
3220 best = pkt_dev;
3221 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0)
3222 best = pkt_dev;
3223 }
3224 rcu_read_unlock();
3225
3226 return best;
3227 }
3228
pktgen_stop(struct pktgen_thread * t)3229 static void pktgen_stop(struct pktgen_thread *t)
3230 {
3231 struct pktgen_dev *pkt_dev;
3232
3233 func_enter();
3234
3235 rcu_read_lock();
3236
3237 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3238 pktgen_stop_device(pkt_dev);
3239 }
3240
3241 rcu_read_unlock();
3242 }
3243
3244 /*
3245 * one of our devices needs to be removed - find it
3246 * and remove it
3247 */
pktgen_rem_one_if(struct pktgen_thread * t)3248 static void pktgen_rem_one_if(struct pktgen_thread *t)
3249 {
3250 struct list_head *q, *n;
3251 struct pktgen_dev *cur;
3252
3253 func_enter();
3254
3255 list_for_each_safe(q, n, &t->if_list) {
3256 cur = list_entry(q, struct pktgen_dev, list);
3257
3258 if (!cur->removal_mark)
3259 continue;
3260
3261 kfree_skb(cur->skb);
3262 cur->skb = NULL;
3263
3264 pktgen_remove_device(t, cur);
3265
3266 break;
3267 }
3268 }
3269
pktgen_rem_all_ifs(struct pktgen_thread * t)3270 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3271 {
3272 struct list_head *q, *n;
3273 struct pktgen_dev *cur;
3274
3275 func_enter();
3276
3277 /* Remove all devices, free mem */
3278
3279 list_for_each_safe(q, n, &t->if_list) {
3280 cur = list_entry(q, struct pktgen_dev, list);
3281
3282 kfree_skb(cur->skb);
3283 cur->skb = NULL;
3284
3285 pktgen_remove_device(t, cur);
3286 }
3287 }
3288
pktgen_rem_thread(struct pktgen_thread * t)3289 static void pktgen_rem_thread(struct pktgen_thread *t)
3290 {
3291 /* Remove from the thread list */
3292 remove_proc_entry(t->tsk->comm, t->net->proc_dir);
3293 }
3294
pktgen_resched(struct pktgen_dev * pkt_dev)3295 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3296 {
3297 ktime_t idle_start = ktime_get();
3298 schedule();
3299 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3300 }
3301
pktgen_wait_for_skb(struct pktgen_dev * pkt_dev)3302 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3303 {
3304 ktime_t idle_start = ktime_get();
3305
3306 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3307 if (signal_pending(current))
3308 break;
3309
3310 if (need_resched())
3311 pktgen_resched(pkt_dev);
3312 else
3313 cpu_relax();
3314 }
3315 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3316 }
3317
pktgen_xmit(struct pktgen_dev * pkt_dev)3318 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3319 {
3320 unsigned int burst = ACCESS_ONCE(pkt_dev->burst);
3321 struct net_device *odev = pkt_dev->odev;
3322 struct netdev_queue *txq;
3323 int ret;
3324
3325 /* If device is offline, then don't send */
3326 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3327 pktgen_stop_device(pkt_dev);
3328 return;
3329 }
3330
3331 /* This is max DELAY, this has special meaning of
3332 * "never transmit"
3333 */
3334 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3335 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
3336 return;
3337 }
3338
3339 /* If no skb or clone count exhausted then get new one */
3340 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3341 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3342 /* build a new pkt */
3343 kfree_skb(pkt_dev->skb);
3344
3345 pkt_dev->skb = fill_packet(odev, pkt_dev);
3346 if (pkt_dev->skb == NULL) {
3347 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3348 schedule();
3349 pkt_dev->clone_count--; /* back out increment, OOM */
3350 return;
3351 }
3352 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3353 pkt_dev->allocated_skbs++;
3354 pkt_dev->clone_count = 0; /* reset counter */
3355 }
3356
3357 if (pkt_dev->delay && pkt_dev->last_ok)
3358 spin(pkt_dev, pkt_dev->next_tx);
3359
3360 txq = skb_get_tx_queue(odev, pkt_dev->skb);
3361
3362 local_bh_disable();
3363
3364 HARD_TX_LOCK(odev, txq, smp_processor_id());
3365
3366 if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) {
3367 ret = NETDEV_TX_BUSY;
3368 pkt_dev->last_ok = 0;
3369 goto unlock;
3370 }
3371 atomic_add(burst, &pkt_dev->skb->users);
3372
3373 xmit_more:
3374 ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0);
3375
3376 switch (ret) {
3377 case NETDEV_TX_OK:
3378 pkt_dev->last_ok = 1;
3379 pkt_dev->sofar++;
3380 pkt_dev->seq_num++;
3381 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3382 if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq))
3383 goto xmit_more;
3384 break;
3385 case NET_XMIT_DROP:
3386 case NET_XMIT_CN:
3387 case NET_XMIT_POLICED:
3388 /* skb has been consumed */
3389 pkt_dev->errors++;
3390 break;
3391 default: /* Drivers are not supposed to return other values! */
3392 net_info_ratelimited("%s xmit error: %d\n",
3393 pkt_dev->odevname, ret);
3394 pkt_dev->errors++;
3395 /* fallthru */
3396 case NETDEV_TX_LOCKED:
3397 case NETDEV_TX_BUSY:
3398 /* Retry it next time */
3399 atomic_dec(&(pkt_dev->skb->users));
3400 pkt_dev->last_ok = 0;
3401 }
3402 if (unlikely(burst))
3403 atomic_sub(burst, &pkt_dev->skb->users);
3404 unlock:
3405 HARD_TX_UNLOCK(odev, txq);
3406
3407 local_bh_enable();
3408
3409 /* If pkt_dev->count is zero, then run forever */
3410 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3411 pktgen_wait_for_skb(pkt_dev);
3412
3413 /* Done with this */
3414 pktgen_stop_device(pkt_dev);
3415 }
3416 }
3417
3418 /*
3419 * Main loop of the thread goes here
3420 */
3421
pktgen_thread_worker(void * arg)3422 static int pktgen_thread_worker(void *arg)
3423 {
3424 DEFINE_WAIT(wait);
3425 struct pktgen_thread *t = arg;
3426 struct pktgen_dev *pkt_dev = NULL;
3427 int cpu = t->cpu;
3428
3429 BUG_ON(smp_processor_id() != cpu);
3430
3431 init_waitqueue_head(&t->queue);
3432 complete(&t->start_done);
3433
3434 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3435
3436 set_freezable();
3437
3438 __set_current_state(TASK_RUNNING);
3439
3440 while (!kthread_should_stop()) {
3441 pkt_dev = next_to_run(t);
3442
3443 if (unlikely(!pkt_dev && t->control == 0)) {
3444 if (t->net->pktgen_exiting)
3445 break;
3446 wait_event_interruptible_timeout(t->queue,
3447 t->control != 0,
3448 HZ/10);
3449 try_to_freeze();
3450 continue;
3451 }
3452
3453 if (likely(pkt_dev)) {
3454 pktgen_xmit(pkt_dev);
3455
3456 if (need_resched())
3457 pktgen_resched(pkt_dev);
3458 else
3459 cpu_relax();
3460 }
3461
3462 if (t->control & T_STOP) {
3463 pktgen_stop(t);
3464 t->control &= ~(T_STOP);
3465 }
3466
3467 if (t->control & T_RUN) {
3468 pktgen_run(t);
3469 t->control &= ~(T_RUN);
3470 }
3471
3472 if (t->control & T_REMDEVALL) {
3473 pktgen_rem_all_ifs(t);
3474 t->control &= ~(T_REMDEVALL);
3475 }
3476
3477 if (t->control & T_REMDEV) {
3478 pktgen_rem_one_if(t);
3479 t->control &= ~(T_REMDEV);
3480 }
3481
3482 try_to_freeze();
3483 }
3484 set_current_state(TASK_INTERRUPTIBLE);
3485
3486 pr_debug("%s stopping all device\n", t->tsk->comm);
3487 pktgen_stop(t);
3488
3489 pr_debug("%s removing all device\n", t->tsk->comm);
3490 pktgen_rem_all_ifs(t);
3491
3492 pr_debug("%s removing thread\n", t->tsk->comm);
3493 pktgen_rem_thread(t);
3494
3495 /* Wait for kthread_stop */
3496 for (;;) {
3497 set_current_state(TASK_INTERRUPTIBLE);
3498 if (kthread_should_stop())
3499 break;
3500 schedule();
3501 }
3502 __set_current_state(TASK_RUNNING);
3503
3504 return 0;
3505 }
3506
pktgen_find_dev(struct pktgen_thread * t,const char * ifname,bool exact)3507 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3508 const char *ifname, bool exact)
3509 {
3510 struct pktgen_dev *p, *pkt_dev = NULL;
3511 size_t len = strlen(ifname);
3512
3513 rcu_read_lock();
3514 list_for_each_entry_rcu(p, &t->if_list, list)
3515 if (strncmp(p->odevname, ifname, len) == 0) {
3516 if (p->odevname[len]) {
3517 if (exact || p->odevname[len] != '@')
3518 continue;
3519 }
3520 pkt_dev = p;
3521 break;
3522 }
3523
3524 rcu_read_unlock();
3525 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3526 return pkt_dev;
3527 }
3528
3529 /*
3530 * Adds a dev at front of if_list.
3531 */
3532
add_dev_to_thread(struct pktgen_thread * t,struct pktgen_dev * pkt_dev)3533 static int add_dev_to_thread(struct pktgen_thread *t,
3534 struct pktgen_dev *pkt_dev)
3535 {
3536 int rv = 0;
3537
3538 /* This function cannot be called concurrently, as its called
3539 * under pktgen_thread_lock mutex, but it can run from
3540 * userspace on another CPU than the kthread. The if_lock()
3541 * is used here to sync with concurrent instances of
3542 * _rem_dev_from_if_list() invoked via kthread, which is also
3543 * updating the if_list */
3544 if_lock(t);
3545
3546 if (pkt_dev->pg_thread) {
3547 pr_err("ERROR: already assigned to a thread\n");
3548 rv = -EBUSY;
3549 goto out;
3550 }
3551
3552 pkt_dev->running = 0;
3553 pkt_dev->pg_thread = t;
3554 list_add_rcu(&pkt_dev->list, &t->if_list);
3555
3556 out:
3557 if_unlock(t);
3558 return rv;
3559 }
3560
3561 /* Called under thread lock */
3562
pktgen_add_device(struct pktgen_thread * t,const char * ifname)3563 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3564 {
3565 struct pktgen_dev *pkt_dev;
3566 int err;
3567 int node = cpu_to_node(t->cpu);
3568
3569 /* We don't allow a device to be on several threads */
3570
3571 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND);
3572 if (pkt_dev) {
3573 pr_err("ERROR: interface already used\n");
3574 return -EBUSY;
3575 }
3576
3577 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3578 if (!pkt_dev)
3579 return -ENOMEM;
3580
3581 strcpy(pkt_dev->odevname, ifname);
3582 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3583 node);
3584 if (pkt_dev->flows == NULL) {
3585 kfree(pkt_dev);
3586 return -ENOMEM;
3587 }
3588
3589 pkt_dev->removal_mark = 0;
3590 pkt_dev->nfrags = 0;
3591 pkt_dev->delay = pg_delay_d;
3592 pkt_dev->count = pg_count_d;
3593 pkt_dev->sofar = 0;
3594 pkt_dev->udp_src_min = 9; /* sink port */
3595 pkt_dev->udp_src_max = 9;
3596 pkt_dev->udp_dst_min = 9;
3597 pkt_dev->udp_dst_max = 9;
3598 pkt_dev->vlan_p = 0;
3599 pkt_dev->vlan_cfi = 0;
3600 pkt_dev->vlan_id = 0xffff;
3601 pkt_dev->svlan_p = 0;
3602 pkt_dev->svlan_cfi = 0;
3603 pkt_dev->svlan_id = 0xffff;
3604 pkt_dev->burst = 1;
3605 pkt_dev->node = -1;
3606
3607 err = pktgen_setup_dev(t->net, pkt_dev, ifname);
3608 if (err)
3609 goto out1;
3610 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3611 pkt_dev->clone_skb = pg_clone_skb_d;
3612
3613 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir,
3614 &pktgen_if_fops, pkt_dev);
3615 if (!pkt_dev->entry) {
3616 pr_err("cannot create %s/%s procfs entry\n",
3617 PG_PROC_DIR, ifname);
3618 err = -EINVAL;
3619 goto out2;
3620 }
3621 #ifdef CONFIG_XFRM
3622 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3623 pkt_dev->ipsproto = IPPROTO_ESP;
3624
3625 /* xfrm tunnel mode needs additional dst to extract outter
3626 * ip header protocol/ttl/id field, here creat a phony one.
3627 * instead of looking for a valid rt, which definitely hurting
3628 * performance under such circumstance.
3629 */
3630 pkt_dev->dstops.family = AF_INET;
3631 pkt_dev->dst.dev = pkt_dev->odev;
3632 dst_init_metrics(&pkt_dev->dst, pktgen_dst_metrics, false);
3633 pkt_dev->dst.child = &pkt_dev->dst;
3634 pkt_dev->dst.ops = &pkt_dev->dstops;
3635 #endif
3636
3637 return add_dev_to_thread(t, pkt_dev);
3638 out2:
3639 dev_put(pkt_dev->odev);
3640 out1:
3641 #ifdef CONFIG_XFRM
3642 free_SAs(pkt_dev);
3643 #endif
3644 vfree(pkt_dev->flows);
3645 kfree(pkt_dev);
3646 return err;
3647 }
3648
pktgen_create_thread(int cpu,struct pktgen_net * pn)3649 static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
3650 {
3651 struct pktgen_thread *t;
3652 struct proc_dir_entry *pe;
3653 struct task_struct *p;
3654
3655 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3656 cpu_to_node(cpu));
3657 if (!t) {
3658 pr_err("ERROR: out of memory, can't create new thread\n");
3659 return -ENOMEM;
3660 }
3661
3662 mutex_init(&t->if_lock);
3663 t->cpu = cpu;
3664
3665 INIT_LIST_HEAD(&t->if_list);
3666
3667 list_add_tail(&t->th_list, &pn->pktgen_threads);
3668 init_completion(&t->start_done);
3669
3670 p = kthread_create_on_node(pktgen_thread_worker,
3671 t,
3672 cpu_to_node(cpu),
3673 "kpktgend_%d", cpu);
3674 if (IS_ERR(p)) {
3675 pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
3676 list_del(&t->th_list);
3677 kfree(t);
3678 return PTR_ERR(p);
3679 }
3680 kthread_bind(p, cpu);
3681 t->tsk = p;
3682
3683 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
3684 &pktgen_thread_fops, t);
3685 if (!pe) {
3686 pr_err("cannot create %s/%s procfs entry\n",
3687 PG_PROC_DIR, t->tsk->comm);
3688 kthread_stop(p);
3689 list_del(&t->th_list);
3690 kfree(t);
3691 return -EINVAL;
3692 }
3693
3694 t->net = pn;
3695 wake_up_process(p);
3696 wait_for_completion(&t->start_done);
3697
3698 return 0;
3699 }
3700
3701 /*
3702 * Removes a device from the thread if_list.
3703 */
_rem_dev_from_if_list(struct pktgen_thread * t,struct pktgen_dev * pkt_dev)3704 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3705 struct pktgen_dev *pkt_dev)
3706 {
3707 struct list_head *q, *n;
3708 struct pktgen_dev *p;
3709
3710 if_lock(t);
3711 list_for_each_safe(q, n, &t->if_list) {
3712 p = list_entry(q, struct pktgen_dev, list);
3713 if (p == pkt_dev)
3714 list_del_rcu(&p->list);
3715 }
3716 if_unlock(t);
3717 }
3718
pktgen_remove_device(struct pktgen_thread * t,struct pktgen_dev * pkt_dev)3719 static int pktgen_remove_device(struct pktgen_thread *t,
3720 struct pktgen_dev *pkt_dev)
3721 {
3722 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3723
3724 if (pkt_dev->running) {
3725 pr_warn("WARNING: trying to remove a running interface, stopping it now\n");
3726 pktgen_stop_device(pkt_dev);
3727 }
3728
3729 /* Dis-associate from the interface */
3730
3731 if (pkt_dev->odev) {
3732 dev_put(pkt_dev->odev);
3733 pkt_dev->odev = NULL;
3734 }
3735
3736 /* Remove proc before if_list entry, because add_device uses
3737 * list to determine if interface already exist, avoid race
3738 * with proc_create_data() */
3739 if (pkt_dev->entry)
3740 proc_remove(pkt_dev->entry);
3741
3742 /* And update the thread if_list */
3743 _rem_dev_from_if_list(t, pkt_dev);
3744
3745 #ifdef CONFIG_XFRM
3746 free_SAs(pkt_dev);
3747 #endif
3748 vfree(pkt_dev->flows);
3749 if (pkt_dev->page)
3750 put_page(pkt_dev->page);
3751 kfree_rcu(pkt_dev, rcu);
3752 return 0;
3753 }
3754
pg_net_init(struct net * net)3755 static int __net_init pg_net_init(struct net *net)
3756 {
3757 struct pktgen_net *pn = net_generic(net, pg_net_id);
3758 struct proc_dir_entry *pe;
3759 int cpu, ret = 0;
3760
3761 pn->net = net;
3762 INIT_LIST_HEAD(&pn->pktgen_threads);
3763 pn->pktgen_exiting = false;
3764 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net);
3765 if (!pn->proc_dir) {
3766 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR);
3767 return -ENODEV;
3768 }
3769 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops);
3770 if (pe == NULL) {
3771 pr_err("cannot create %s procfs entry\n", PGCTRL);
3772 ret = -EINVAL;
3773 goto remove;
3774 }
3775
3776 for_each_online_cpu(cpu) {
3777 int err;
3778
3779 err = pktgen_create_thread(cpu, pn);
3780 if (err)
3781 pr_warn("Cannot create thread for cpu %d (%d)\n",
3782 cpu, err);
3783 }
3784
3785 if (list_empty(&pn->pktgen_threads)) {
3786 pr_err("Initialization failed for all threads\n");
3787 ret = -ENODEV;
3788 goto remove_entry;
3789 }
3790
3791 return 0;
3792
3793 remove_entry:
3794 remove_proc_entry(PGCTRL, pn->proc_dir);
3795 remove:
3796 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3797 return ret;
3798 }
3799
pg_net_exit(struct net * net)3800 static void __net_exit pg_net_exit(struct net *net)
3801 {
3802 struct pktgen_net *pn = net_generic(net, pg_net_id);
3803 struct pktgen_thread *t;
3804 struct list_head *q, *n;
3805 LIST_HEAD(list);
3806
3807 /* Stop all interfaces & threads */
3808 pn->pktgen_exiting = true;
3809
3810 mutex_lock(&pktgen_thread_lock);
3811 list_splice_init(&pn->pktgen_threads, &list);
3812 mutex_unlock(&pktgen_thread_lock);
3813
3814 list_for_each_safe(q, n, &list) {
3815 t = list_entry(q, struct pktgen_thread, th_list);
3816 list_del(&t->th_list);
3817 kthread_stop(t->tsk);
3818 kfree(t);
3819 }
3820
3821 remove_proc_entry(PGCTRL, pn->proc_dir);
3822 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
3823 }
3824
3825 static struct pernet_operations pg_net_ops = {
3826 .init = pg_net_init,
3827 .exit = pg_net_exit,
3828 .id = &pg_net_id,
3829 .size = sizeof(struct pktgen_net),
3830 };
3831
pg_init(void)3832 static int __init pg_init(void)
3833 {
3834 int ret = 0;
3835
3836 pr_info("%s", version);
3837 ret = register_pernet_subsys(&pg_net_ops);
3838 if (ret)
3839 return ret;
3840 ret = register_netdevice_notifier(&pktgen_notifier_block);
3841 if (ret)
3842 unregister_pernet_subsys(&pg_net_ops);
3843
3844 return ret;
3845 }
3846
pg_cleanup(void)3847 static void __exit pg_cleanup(void)
3848 {
3849 unregister_netdevice_notifier(&pktgen_notifier_block);
3850 unregister_pernet_subsys(&pg_net_ops);
3851 /* Don't need rcu_barrier() due to use of kfree_rcu() */
3852 }
3853
3854 module_init(pg_init);
3855 module_exit(pg_cleanup);
3856
3857 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3858 MODULE_DESCRIPTION("Packet Generator tool");
3859 MODULE_LICENSE("GPL");
3860 MODULE_VERSION(VERSION);
3861 module_param(pg_count_d, int, 0);
3862 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3863 module_param(pg_delay_d, int, 0);
3864 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3865 module_param(pg_clone_skb_d, int, 0);
3866 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3867 module_param(debug, int, 0);
3868 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
3869