1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Authors:
4 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
5 * Uppsala University and
6 * Swedish University of Agricultural Sciences
7 *
8 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
9 * Ben Greear <greearb@candelatech.com>
10 * Jens Låås <jens.laas@data.slu.se>
11 *
12 * A tool for loading the network with preconfigurated packets.
13 * The tool is implemented as a linux module. Parameters are output
14 * device, delay (to hard_xmit), number of packets, and whether
15 * to use multiple SKBs or just the same one.
16 * pktgen uses the installed interface's output routine.
17 *
18 * Additional hacking by:
19 *
20 * Jens.Laas@data.slu.se
21 * Improved by ANK. 010120.
22 * Improved by ANK even more. 010212.
23 * MAC address typo fixed. 010417 --ro
24 * Integrated. 020301 --DaveM
25 * Added multiskb option 020301 --DaveM
26 * Scaling of results. 020417--sigurdur@linpro.no
27 * Significant re-work of the module:
28 * * Convert to threaded model to more efficiently be able to transmit
29 * and receive on multiple interfaces at once.
30 * * Converted many counters to __u64 to allow longer runs.
31 * * Allow configuration of ranges, like min/max IP address, MACs,
32 * and UDP-ports, for both source and destination, and can
33 * set to use a random distribution or sequentially walk the range.
34 * * Can now change most values after starting.
35 * * Place 12-byte packet in UDP payload with magic number,
36 * sequence number, and timestamp.
37 * * Add receiver code that detects dropped pkts, re-ordered pkts, and
38 * latencies (with micro-second) precision.
39 * * Add IOCTL interface to easily get counters & configuration.
40 * --Ben Greear <greearb@candelatech.com>
41 *
42 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
43 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
44 * as a "fastpath" with a configurable number of clones after alloc's.
45 * clone_skb=0 means all packets are allocated this also means ranges time
46 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
47 * clones.
48 *
49 * Also moved to /proc/net/pktgen/
50 * --ro
51 *
52 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
53 * mistakes. Also merged in DaveM's patch in the -pre6 patch.
54 * --Ben Greear <greearb@candelatech.com>
55 *
56 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
57 *
58 * 021124 Finished major redesign and rewrite for new functionality.
59 * See Documentation/networking/pktgen.rst for how to use this.
60 *
61 * The new operation:
62 * For each CPU one thread/process is created at start. This process checks
63 * for running devices in the if_list and sends packets until count is 0 it
64 * also the thread checks the thread->control which is used for inter-process
65 * communication. controlling process "posts" operations to the threads this
66 * way.
67 * The if_list is RCU protected, and the if_lock remains to protect updating
68 * of if_list, from "add_device" as it invoked from userspace (via proc write).
69 *
70 * By design there should only be *one* "controlling" process. In practice
71 * multiple write accesses gives unpredictable result. Understood by "write"
72 * to /proc gives result code thats should be read be the "writer".
73 * For practical use this should be no problem.
74 *
75 * Note when adding devices to a specific CPU there good idea to also assign
76 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
77 * --ro
78 *
79 * Fix refcount off by one if first packet fails, potential null deref,
80 * memleak 030710- KJP
81 *
82 * First "ranges" functionality for ipv6 030726 --ro
83 *
84 * Included flow support. 030802 ANK.
85 *
86 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
87 *
88 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
89 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
90 *
91 * New xmit() return, do_div and misc clean up by Stephen Hemminger
92 * <shemminger@osdl.org> 040923
93 *
94 * Randy Dunlap fixed u64 printk compiler warning
95 *
96 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
97 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
98 *
99 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
100 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
101 *
102 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
103 * 050103
104 *
105 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
106 *
107 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
108 *
109 * Fixed src_mac command to set source mac of packet to value specified in
110 * command by Adit Ranadive <adit.262@gmail.com>
111 */
112
113 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
114
115 #include <linux/sys.h>
116 #include <linux/types.h>
117 #include <linux/module.h>
118 #include <linux/moduleparam.h>
119 #include <linux/kernel.h>
120 #include <linux/mutex.h>
121 #include <linux/sched.h>
122 #include <linux/slab.h>
123 #include <linux/vmalloc.h>
124 #include <linux/unistd.h>
125 #include <linux/string.h>
126 #include <linux/ptrace.h>
127 #include <linux/errno.h>
128 #include <linux/ioport.h>
129 #include <linux/interrupt.h>
130 #include <linux/capability.h>
131 #include <linux/hrtimer.h>
132 #include <linux/freezer.h>
133 #include <linux/delay.h>
134 #include <linux/timer.h>
135 #include <linux/list.h>
136 #include <linux/init.h>
137 #include <linux/skbuff.h>
138 #include <linux/netdevice.h>
139 #include <linux/inet.h>
140 #include <linux/inetdevice.h>
141 #include <linux/rtnetlink.h>
142 #include <linux/if_arp.h>
143 #include <linux/if_vlan.h>
144 #include <linux/in.h>
145 #include <linux/ip.h>
146 #include <linux/ipv6.h>
147 #include <linux/udp.h>
148 #include <linux/proc_fs.h>
149 #include <linux/seq_file.h>
150 #include <linux/wait.h>
151 #include <linux/etherdevice.h>
152 #include <linux/kthread.h>
153 #include <linux/prefetch.h>
154 #include <linux/mmzone.h>
155 #include <net/net_namespace.h>
156 #include <net/checksum.h>
157 #include <net/ipv6.h>
158 #include <net/udp.h>
159 #include <net/ip6_checksum.h>
160 #include <net/addrconf.h>
161 #ifdef CONFIG_XFRM
162 #include <net/xfrm.h>
163 #endif
164 #include <net/netns/generic.h>
165 #include <asm/byteorder.h>
166 #include <linux/rcupdate.h>
167 #include <linux/bitops.h>
168 #include <linux/io.h>
169 #include <linux/timex.h>
170 #include <linux/uaccess.h>
171 #include <asm/dma.h>
172 #include <asm/div64.h> /* do_div */
173
174 #define VERSION "2.75"
175 #define IP_NAME_SZ 32
176 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
177 #define MPLS_STACK_BOTTOM htonl(0x00000100)
178 /* Max number of internet mix entries that can be specified in imix_weights. */
179 #define MAX_IMIX_ENTRIES 20
180 #define IMIX_PRECISION 100 /* Precision of IMIX distribution */
181
182 #define func_enter() pr_debug("entering %s\n", __func__);
183
184 #define PKT_FLAGS \
185 pf(IPV6) /* Interface in IPV6 Mode */ \
186 pf(IPSRC_RND) /* IP-Src Random */ \
187 pf(IPDST_RND) /* IP-Dst Random */ \
188 pf(TXSIZE_RND) /* Transmit size is random */ \
189 pf(UDPSRC_RND) /* UDP-Src Random */ \
190 pf(UDPDST_RND) /* UDP-Dst Random */ \
191 pf(UDPCSUM) /* Include UDP checksum */ \
192 pf(NO_TIMESTAMP) /* Don't timestamp packets (default TS) */ \
193 pf(MPLS_RND) /* Random MPLS labels */ \
194 pf(QUEUE_MAP_RND) /* queue map Random */ \
195 pf(QUEUE_MAP_CPU) /* queue map mirrors smp_processor_id() */ \
196 pf(FLOW_SEQ) /* Sequential flows */ \
197 pf(IPSEC) /* ipsec on for flows */ \
198 pf(MACSRC_RND) /* MAC-Src Random */ \
199 pf(MACDST_RND) /* MAC-Dst Random */ \
200 pf(VID_RND) /* Random VLAN ID */ \
201 pf(SVID_RND) /* Random SVLAN ID */ \
202 pf(NODE) /* Node memory alloc*/ \
203 pf(SHARED) /* Shared SKB */ \
204
205 #define pf(flag) flag##_SHIFT,
206 enum pkt_flags {
207 PKT_FLAGS
208 };
209 #undef pf
210
211 /* Device flag bits */
212 #define pf(flag) static const __u32 F_##flag = (1<<flag##_SHIFT);
213 PKT_FLAGS
214 #undef pf
215
216 #define pf(flag) __stringify(flag),
217 static char *pkt_flag_names[] = {
218 PKT_FLAGS
219 };
220 #undef pf
221
222 #define NR_PKT_FLAGS ARRAY_SIZE(pkt_flag_names)
223
224 /* Thread control flag bits */
225 #define T_STOP (1<<0) /* Stop run */
226 #define T_RUN (1<<1) /* Start run */
227 #define T_REMDEVALL (1<<2) /* Remove all devs */
228 #define T_REMDEV (1<<3) /* Remove one dev */
229
230 /* Xmit modes */
231 #define M_START_XMIT 0 /* Default normal TX */
232 #define M_NETIF_RECEIVE 1 /* Inject packets into stack */
233 #define M_QUEUE_XMIT 2 /* Inject packet into qdisc */
234
235 /* If lock -- protects updating of if_list */
236 #define if_lock(t) mutex_lock(&(t->if_lock));
237 #define if_unlock(t) mutex_unlock(&(t->if_lock));
238
239 /* Used to help with determining the pkts on receive */
240 #define PKTGEN_MAGIC 0xbe9be955
241 #define PG_PROC_DIR "pktgen"
242 #define PGCTRL "pgctrl"
243
244 #define MAX_CFLOWS 65536
245
246 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
247 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
248
249 struct imix_pkt {
250 u64 size;
251 u64 weight;
252 u64 count_so_far;
253 };
254
255 struct flow_state {
256 __be32 cur_daddr;
257 int count;
258 #ifdef CONFIG_XFRM
259 struct xfrm_state *x;
260 #endif
261 __u32 flags;
262 };
263
264 /* flow flag bits */
265 #define F_INIT (1<<0) /* flow has been initialized */
266
267 struct pktgen_dev {
268 /*
269 * Try to keep frequent/infrequent used vars. separated.
270 */
271 struct proc_dir_entry *entry; /* proc file */
272 struct pktgen_thread *pg_thread;/* the owner */
273 struct list_head list; /* chaining in the thread's run-queue */
274 struct rcu_head rcu; /* freed by RCU */
275
276 int running; /* if false, the test will stop */
277
278 /* If min != max, then we will either do a linear iteration, or
279 * we will do a random selection from within the range.
280 */
281 __u32 flags;
282 int xmit_mode;
283 int min_pkt_size;
284 int max_pkt_size;
285 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
286 int nfrags;
287 int removal_mark; /* non-zero => the device is marked for
288 * removal by worker thread */
289
290 struct page *page;
291 u64 delay; /* nano-seconds */
292
293 __u64 count; /* Default No packets to send */
294 __u64 sofar; /* How many pkts we've sent so far */
295 __u64 tx_bytes; /* How many bytes we've transmitted */
296 __u64 errors; /* Errors when trying to transmit, */
297
298 /* runtime counters relating to clone_skb */
299
300 __u32 clone_count;
301 int last_ok; /* Was last skb sent?
302 * Or a failed transmit of some sort?
303 * This will keep sequence numbers in order
304 */
305 ktime_t next_tx;
306 ktime_t started_at;
307 ktime_t stopped_at;
308 u64 idle_acc; /* nano-seconds */
309
310 __u32 seq_num;
311
312 int clone_skb; /*
313 * Use multiple SKBs during packet gen.
314 * If this number is greater than 1, then
315 * that many copies of the same packet will be
316 * sent before a new packet is allocated.
317 * If you want to send 1024 identical packets
318 * before creating a new packet,
319 * set clone_skb to 1024.
320 */
321
322 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
323 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
324 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
325 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
326
327 struct in6_addr in6_saddr;
328 struct in6_addr in6_daddr;
329 struct in6_addr cur_in6_daddr;
330 struct in6_addr cur_in6_saddr;
331 /* For ranges */
332 struct in6_addr min_in6_daddr;
333 struct in6_addr max_in6_daddr;
334 struct in6_addr min_in6_saddr;
335 struct in6_addr max_in6_saddr;
336
337 /* If we're doing ranges, random or incremental, then this
338 * defines the min/max for those ranges.
339 */
340 __be32 saddr_min; /* inclusive, source IP address */
341 __be32 saddr_max; /* exclusive, source IP address */
342 __be32 daddr_min; /* inclusive, dest IP address */
343 __be32 daddr_max; /* exclusive, dest IP address */
344
345 __u16 udp_src_min; /* inclusive, source UDP port */
346 __u16 udp_src_max; /* exclusive, source UDP port */
347 __u16 udp_dst_min; /* inclusive, dest UDP port */
348 __u16 udp_dst_max; /* exclusive, dest UDP port */
349
350 /* DSCP + ECN */
351 __u8 tos; /* six MSB of (former) IPv4 TOS
352 are for dscp codepoint */
353 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
354 (see RFC 3260, sec. 4) */
355
356 /* IMIX */
357 unsigned int n_imix_entries;
358 struct imix_pkt imix_entries[MAX_IMIX_ENTRIES];
359 /* Maps 0-IMIX_PRECISION range to imix_entry based on probability*/
360 __u8 imix_distribution[IMIX_PRECISION];
361
362 /* MPLS */
363 unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */
364 __be32 labels[MAX_MPLS_LABELS];
365
366 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
367 __u8 vlan_p;
368 __u8 vlan_cfi;
369 __u16 vlan_id; /* 0xffff means no vlan tag */
370
371 __u8 svlan_p;
372 __u8 svlan_cfi;
373 __u16 svlan_id; /* 0xffff means no svlan tag */
374
375 __u32 src_mac_count; /* How many MACs to iterate through */
376 __u32 dst_mac_count; /* How many MACs to iterate through */
377
378 unsigned char dst_mac[ETH_ALEN];
379 unsigned char src_mac[ETH_ALEN];
380
381 __u32 cur_dst_mac_offset;
382 __u32 cur_src_mac_offset;
383 __be32 cur_saddr;
384 __be32 cur_daddr;
385 __u16 ip_id;
386 __u16 cur_udp_dst;
387 __u16 cur_udp_src;
388 __u16 cur_queue_map;
389 __u32 cur_pkt_size;
390 __u32 last_pkt_size;
391
392 __u8 hh[14];
393 /* = {
394 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
395
396 We fill in SRC address later
397 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
398 0x08, 0x00
399 };
400 */
401 __u16 pad; /* pad out the hh struct to an even 16 bytes */
402
403 struct sk_buff *skb; /* skb we are to transmit next, used for when we
404 * are transmitting the same one multiple times
405 */
406 struct net_device *odev; /* The out-going device.
407 * Note that the device should have it's
408 * pg_info pointer pointing back to this
409 * device.
410 * Set when the user specifies the out-going
411 * device name (not when the inject is
412 * started as it used to do.)
413 */
414 netdevice_tracker dev_tracker;
415 char odevname[32];
416 struct flow_state *flows;
417 unsigned int cflows; /* Concurrent flows (config) */
418 unsigned int lflow; /* Flow length (config) */
419 unsigned int nflows; /* accumulated flows (stats) */
420 unsigned int curfl; /* current sequenced flow (state)*/
421
422 u16 queue_map_min;
423 u16 queue_map_max;
424 __u32 skb_priority; /* skb priority field */
425 unsigned int burst; /* number of duplicated packets to burst */
426 int node; /* Memory node */
427
428 #ifdef CONFIG_XFRM
429 __u8 ipsmode; /* IPSEC mode (config) */
430 __u8 ipsproto; /* IPSEC type (config) */
431 __u32 spi;
432 struct xfrm_dst xdst;
433 struct dst_ops dstops;
434 #endif
435 char result[512];
436 };
437
438 struct pktgen_hdr {
439 __be32 pgh_magic;
440 __be32 seq_num;
441 __be32 tv_sec;
442 __be32 tv_usec;
443 };
444
445
446 static unsigned int pg_net_id __read_mostly;
447
448 struct pktgen_net {
449 struct net *net;
450 struct proc_dir_entry *proc_dir;
451 struct list_head pktgen_threads;
452 bool pktgen_exiting;
453 };
454
455 struct pktgen_thread {
456 struct mutex if_lock; /* for list of devices */
457 struct list_head if_list; /* All device here */
458 struct list_head th_list;
459 struct task_struct *tsk;
460 char result[512];
461
462 /* Field for thread to receive "posted" events terminate,
463 stop ifs etc. */
464
465 u32 control;
466 int cpu;
467
468 wait_queue_head_t queue;
469 struct completion start_done;
470 struct pktgen_net *net;
471 };
472
473 #define REMOVE 1
474 #define FIND 0
475
476 static const char version[] =
477 "Packet Generator for packet performance testing. "
478 "Version: " VERSION "\n";
479
480 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
481 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
482 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
483 const char *ifname, bool exact);
484 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
485 static void pktgen_run_all_threads(struct pktgen_net *pn);
486 static void pktgen_reset_all_threads(struct pktgen_net *pn);
487 static void pktgen_stop_all_threads(struct pktgen_net *pn);
488
489 static void pktgen_stop(struct pktgen_thread *t);
490 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
491 static void fill_imix_distribution(struct pktgen_dev *pkt_dev);
492
493 /* Module parameters, defaults. */
494 static int pg_count_d __read_mostly = 1000;
495 static int pg_delay_d __read_mostly;
496 static int pg_clone_skb_d __read_mostly;
497 static int debug __read_mostly;
498
499 static DEFINE_MUTEX(pktgen_thread_lock);
500
501 static struct notifier_block pktgen_notifier_block = {
502 .notifier_call = pktgen_device_event,
503 };
504
505 /*
506 * /proc handling functions
507 *
508 */
509
510 static int pgctrl_show(struct seq_file *seq, void *v)
511 {
512 seq_puts(seq, version);
513 return 0;
514 }
515
516 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
517 size_t count, loff_t *ppos)
518 {
519 char data[128];
520 struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
521
522 if (!capable(CAP_NET_ADMIN))
523 return -EPERM;
524
525 if (count == 0)
526 return -EINVAL;
527
528 if (count > sizeof(data))
529 count = sizeof(data);
530
531 if (copy_from_user(data, buf, count))
532 return -EFAULT;
533
534 data[count - 1] = 0; /* Strip trailing '\n' and terminate string */
535
536 if (!strcmp(data, "stop"))
537 pktgen_stop_all_threads(pn);
538 else if (!strcmp(data, "start"))
539 pktgen_run_all_threads(pn);
540 else if (!strcmp(data, "reset"))
541 pktgen_reset_all_threads(pn);
542 else
543 return -EINVAL;
544
545 return count;
546 }
547
548 static int pgctrl_open(struct inode *inode, struct file *file)
549 {
550 return single_open(file, pgctrl_show, pde_data(inode));
551 }
552
553 static const struct proc_ops pktgen_proc_ops = {
554 .proc_open = pgctrl_open,
555 .proc_read = seq_read,
556 .proc_lseek = seq_lseek,
557 .proc_write = pgctrl_write,
558 .proc_release = single_release,
559 };
560
561 static int pktgen_if_show(struct seq_file *seq, void *v)
562 {
563 const struct pktgen_dev *pkt_dev = seq->private;
564 ktime_t stopped;
565 unsigned int i;
566 u64 idle;
567
568 seq_printf(seq,
569 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
570 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
571 pkt_dev->max_pkt_size);
572
573 if (pkt_dev->n_imix_entries > 0) {
574 seq_puts(seq, " imix_weights: ");
575 for (i = 0; i < pkt_dev->n_imix_entries; i++) {
576 seq_printf(seq, "%llu,%llu ",
577 pkt_dev->imix_entries[i].size,
578 pkt_dev->imix_entries[i].weight);
579 }
580 seq_puts(seq, "\n");
581 }
582
583 seq_printf(seq,
584 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
585 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
586 pkt_dev->clone_skb, pkt_dev->odevname);
587
588 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
589 pkt_dev->lflow);
590
591 seq_printf(seq,
592 " queue_map_min: %u queue_map_max: %u\n",
593 pkt_dev->queue_map_min,
594 pkt_dev->queue_map_max);
595
596 if (pkt_dev->skb_priority)
597 seq_printf(seq, " skb_priority: %u\n",
598 pkt_dev->skb_priority);
599
600 if (pkt_dev->flags & F_IPV6) {
601 seq_printf(seq,
602 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
603 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
604 &pkt_dev->in6_saddr,
605 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
606 &pkt_dev->in6_daddr,
607 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
608 } else {
609 seq_printf(seq,
610 " dst_min: %s dst_max: %s\n",
611 pkt_dev->dst_min, pkt_dev->dst_max);
612 seq_printf(seq,
613 " src_min: %s src_max: %s\n",
614 pkt_dev->src_min, pkt_dev->src_max);
615 }
616
617 seq_puts(seq, " src_mac: ");
618
619 seq_printf(seq, "%pM ",
620 is_zero_ether_addr(pkt_dev->src_mac) ?
621 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
622
623 seq_puts(seq, "dst_mac: ");
624 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
625
626 seq_printf(seq,
627 " udp_src_min: %d udp_src_max: %d"
628 " udp_dst_min: %d udp_dst_max: %d\n",
629 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
630 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
631
632 seq_printf(seq,
633 " src_mac_count: %d dst_mac_count: %d\n",
634 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
635
636 if (pkt_dev->nr_labels) {
637 seq_puts(seq, " mpls: ");
638 for (i = 0; i < pkt_dev->nr_labels; i++)
639 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
640 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
641 }
642
643 if (pkt_dev->vlan_id != 0xffff)
644 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
645 pkt_dev->vlan_id, pkt_dev->vlan_p,
646 pkt_dev->vlan_cfi);
647
648 if (pkt_dev->svlan_id != 0xffff)
649 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
650 pkt_dev->svlan_id, pkt_dev->svlan_p,
651 pkt_dev->svlan_cfi);
652
653 if (pkt_dev->tos)
654 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
655
656 if (pkt_dev->traffic_class)
657 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
658
659 if (pkt_dev->burst > 1)
660 seq_printf(seq, " burst: %d\n", pkt_dev->burst);
661
662 if (pkt_dev->node >= 0)
663 seq_printf(seq, " node: %d\n", pkt_dev->node);
664
665 if (pkt_dev->xmit_mode == M_NETIF_RECEIVE)
666 seq_puts(seq, " xmit_mode: netif_receive\n");
667 else if (pkt_dev->xmit_mode == M_QUEUE_XMIT)
668 seq_puts(seq, " xmit_mode: xmit_queue\n");
669
670 seq_puts(seq, " Flags: ");
671
672 for (i = 0; i < NR_PKT_FLAGS; i++) {
673 if (i == FLOW_SEQ_SHIFT)
674 if (!pkt_dev->cflows)
675 continue;
676
677 if (pkt_dev->flags & (1 << i)) {
678 seq_printf(seq, "%s ", pkt_flag_names[i]);
679 #ifdef CONFIG_XFRM
680 if (i == IPSEC_SHIFT && pkt_dev->spi)
681 seq_printf(seq, "spi:%u ", pkt_dev->spi);
682 #endif
683 } else if (i == FLOW_SEQ_SHIFT) {
684 seq_puts(seq, "FLOW_RND ");
685 }
686 }
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 if (pkt_dev->n_imix_entries > 0) {
701 int i;
702
703 seq_puts(seq, " imix_size_counts: ");
704 for (i = 0; i < pkt_dev->n_imix_entries; i++) {
705 seq_printf(seq, "%llu,%llu ",
706 pkt_dev->imix_entries[i].size,
707 pkt_dev->imix_entries[i].count_so_far);
708 }
709 seq_puts(seq, "\n");
710 }
711
712 seq_printf(seq,
713 " started: %lluus stopped: %lluus idle: %lluus\n",
714 (unsigned long long) ktime_to_us(pkt_dev->started_at),
715 (unsigned long long) ktime_to_us(stopped),
716 (unsigned long long) idle);
717
718 seq_printf(seq,
719 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
720 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
721 pkt_dev->cur_src_mac_offset);
722
723 if (pkt_dev->flags & F_IPV6) {
724 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
725 &pkt_dev->cur_in6_saddr,
726 &pkt_dev->cur_in6_daddr);
727 } else
728 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n",
729 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
730
731 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
732 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
733
734 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
735
736 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
737
738 if (pkt_dev->result[0])
739 seq_printf(seq, "Result: %s\n", pkt_dev->result);
740 else
741 seq_puts(seq, "Result: Idle\n");
742
743 return 0;
744 }
745
746
747 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
748 __u32 *num)
749 {
750 int i = 0;
751 *num = 0;
752
753 for (; i < maxlen; i++) {
754 int value;
755 char c;
756 *num <<= 4;
757 if (get_user(c, &user_buffer[i]))
758 return -EFAULT;
759 value = hex_to_bin(c);
760 if (value >= 0)
761 *num |= value;
762 else
763 break;
764 }
765 return i;
766 }
767
768 static int count_trail_chars(const char __user * user_buffer,
769 unsigned int maxlen)
770 {
771 int i;
772
773 for (i = 0; i < maxlen; i++) {
774 char c;
775 if (get_user(c, &user_buffer[i]))
776 return -EFAULT;
777 switch (c) {
778 case '\"':
779 case '\n':
780 case '\r':
781 case '\t':
782 case ' ':
783 case '=':
784 break;
785 default:
786 goto done;
787 }
788 }
789 done:
790 return i;
791 }
792
793 static long num_arg(const char __user *user_buffer, unsigned long maxlen,
794 unsigned long *num)
795 {
796 int i;
797 *num = 0;
798
799 for (i = 0; i < maxlen; i++) {
800 char c;
801 if (get_user(c, &user_buffer[i]))
802 return -EFAULT;
803 if ((c >= '') && (c <= '9')) {
804 *num *= 10;
805 *num += c - '';
806 } else
807 break;
808 }
809 return i;
810 }
811
812 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
813 {
814 int i;
815
816 for (i = 0; i < maxlen; i++) {
817 char c;
818 if (get_user(c, &user_buffer[i]))
819 return -EFAULT;
820 switch (c) {
821 case '\"':
822 case '\n':
823 case '\r':
824 case '\t':
825 case ' ':
826 goto done_str;
827 default:
828 break;
829 }
830 }
831 done_str:
832 return i;
833 }
834
835 /* Parses imix entries from user buffer.
836 * The user buffer should consist of imix entries separated by spaces
837 * where each entry consists of size and weight delimited by commas.
838 * "size1,weight_1 size2,weight_2 ... size_n,weight_n" for example.
839 */
840 static ssize_t get_imix_entries(const char __user *buffer,
841 struct pktgen_dev *pkt_dev)
842 {
843 const int max_digits = 10;
844 int i = 0;
845 long len;
846 char c;
847
848 pkt_dev->n_imix_entries = 0;
849
850 do {
851 unsigned long weight;
852 unsigned long size;
853
854 len = num_arg(&buffer[i], max_digits, &size);
855 if (len < 0)
856 return len;
857 i += len;
858 if (get_user(c, &buffer[i]))
859 return -EFAULT;
860 /* Check for comma between size_i and weight_i */
861 if (c != ',')
862 return -EINVAL;
863 i++;
864
865 if (size < 14 + 20 + 8)
866 size = 14 + 20 + 8;
867
868 len = num_arg(&buffer[i], max_digits, &weight);
869 if (len < 0)
870 return len;
871 if (weight <= 0)
872 return -EINVAL;
873
874 pkt_dev->imix_entries[pkt_dev->n_imix_entries].size = size;
875 pkt_dev->imix_entries[pkt_dev->n_imix_entries].weight = weight;
876
877 i += len;
878 if (get_user(c, &buffer[i]))
879 return -EFAULT;
880
881 i++;
882 pkt_dev->n_imix_entries++;
883
884 if (pkt_dev->n_imix_entries > MAX_IMIX_ENTRIES)
885 return -E2BIG;
886 } while (c == ' ');
887
888 return i;
889 }
890
891 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
892 {
893 unsigned int n = 0;
894 char c;
895 ssize_t i = 0;
896 int len;
897
898 pkt_dev->nr_labels = 0;
899 do {
900 __u32 tmp;
901 len = hex32_arg(&buffer[i], 8, &tmp);
902 if (len <= 0)
903 return len;
904 pkt_dev->labels[n] = htonl(tmp);
905 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
906 pkt_dev->flags |= F_MPLS_RND;
907 i += len;
908 if (get_user(c, &buffer[i]))
909 return -EFAULT;
910 i++;
911 n++;
912 if (n >= MAX_MPLS_LABELS)
913 return -E2BIG;
914 } while (c == ',');
915
916 pkt_dev->nr_labels = n;
917 return i;
918 }
919
920 static __u32 pktgen_read_flag(const char *f, bool *disable)
921 {
922 __u32 i;
923
924 if (f[0] == '!') {
925 *disable = true;
926 f++;
927 }
928
929 for (i = 0; i < NR_PKT_FLAGS; i++) {
930 if (!IS_ENABLED(CONFIG_XFRM) && i == IPSEC_SHIFT)
931 continue;
932
933 /* allow only disabling ipv6 flag */
934 if (!*disable && i == IPV6_SHIFT)
935 continue;
936
937 if (strcmp(f, pkt_flag_names[i]) == 0)
938 return 1 << i;
939 }
940
941 if (strcmp(f, "FLOW_RND") == 0) {
942 *disable = !*disable;
943 return F_FLOW_SEQ;
944 }
945
946 return 0;
947 }
948
949 static ssize_t pktgen_if_write(struct file *file,
950 const char __user * user_buffer, size_t count,
951 loff_t * offset)
952 {
953 struct seq_file *seq = file->private_data;
954 struct pktgen_dev *pkt_dev = seq->private;
955 int i, max, len;
956 char name[16], valstr[32];
957 unsigned long value = 0;
958 char *pg_result = NULL;
959 int tmp = 0;
960 char buf[128];
961
962 pg_result = &(pkt_dev->result[0]);
963
964 if (count < 1) {
965 pr_warn("wrong command format\n");
966 return -EINVAL;
967 }
968
969 max = count;
970 tmp = count_trail_chars(user_buffer, max);
971 if (tmp < 0) {
972 pr_warn("illegal format\n");
973 return tmp;
974 }
975 i = tmp;
976
977 /* Read variable name */
978
979 len = strn_len(&user_buffer[i], sizeof(name) - 1);
980 if (len < 0)
981 return len;
982
983 memset(name, 0, sizeof(name));
984 if (copy_from_user(name, &user_buffer[i], len))
985 return -EFAULT;
986 i += len;
987
988 max = count - i;
989 len = count_trail_chars(&user_buffer[i], max);
990 if (len < 0)
991 return len;
992
993 i += len;
994
995 if (debug) {
996 size_t copy = min_t(size_t, count + 1, 1024);
997 char *tp = strndup_user(user_buffer, copy);
998
999 if (IS_ERR(tp))
1000 return PTR_ERR(tp);
1001
1002 pr_debug("%s,%zu buffer -:%s:-\n", name, count, tp);
1003 kfree(tp);
1004 }
1005
1006 if (!strcmp(name, "min_pkt_size")) {
1007 len = num_arg(&user_buffer[i], 10, &value);
1008 if (len < 0)
1009 return len;
1010
1011 i += len;
1012 if (value < 14 + 20 + 8)
1013 value = 14 + 20 + 8;
1014 if (value != pkt_dev->min_pkt_size) {
1015 pkt_dev->min_pkt_size = value;
1016 pkt_dev->cur_pkt_size = value;
1017 }
1018 sprintf(pg_result, "OK: min_pkt_size=%d",
1019 pkt_dev->min_pkt_size);
1020 return count;
1021 }
1022
1023 if (!strcmp(name, "max_pkt_size")) {
1024 len = num_arg(&user_buffer[i], 10, &value);
1025 if (len < 0)
1026 return len;
1027
1028 i += len;
1029 if (value < 14 + 20 + 8)
1030 value = 14 + 20 + 8;
1031 if (value != pkt_dev->max_pkt_size) {
1032 pkt_dev->max_pkt_size = value;
1033 pkt_dev->cur_pkt_size = value;
1034 }
1035 sprintf(pg_result, "OK: max_pkt_size=%d",
1036 pkt_dev->max_pkt_size);
1037 return count;
1038 }
1039
1040 /* Shortcut for min = max */
1041
1042 if (!strcmp(name, "pkt_size")) {
1043 len = num_arg(&user_buffer[i], 10, &value);
1044 if (len < 0)
1045 return len;
1046
1047 i += len;
1048 if (value < 14 + 20 + 8)
1049 value = 14 + 20 + 8;
1050 if (value != pkt_dev->min_pkt_size) {
1051 pkt_dev->min_pkt_size = value;
1052 pkt_dev->max_pkt_size = value;
1053 pkt_dev->cur_pkt_size = value;
1054 }
1055 sprintf(pg_result, "OK: pkt_size=%d", pkt_dev->min_pkt_size);
1056 return count;
1057 }
1058
1059 if (!strcmp(name, "imix_weights")) {
1060 if (pkt_dev->clone_skb > 0)
1061 return -EINVAL;
1062
1063 len = get_imix_entries(&user_buffer[i], pkt_dev);
1064 if (len < 0)
1065 return len;
1066
1067 fill_imix_distribution(pkt_dev);
1068
1069 i += len;
1070 return count;
1071 }
1072
1073 if (!strcmp(name, "debug")) {
1074 len = num_arg(&user_buffer[i], 10, &value);
1075 if (len < 0)
1076 return len;
1077
1078 i += len;
1079 debug = value;
1080 sprintf(pg_result, "OK: debug=%u", debug);
1081 return count;
1082 }
1083
1084 if (!strcmp(name, "frags")) {
1085 len = num_arg(&user_buffer[i], 10, &value);
1086 if (len < 0)
1087 return len;
1088
1089 i += len;
1090 pkt_dev->nfrags = value;
1091 sprintf(pg_result, "OK: frags=%d", pkt_dev->nfrags);
1092 return count;
1093 }
1094 if (!strcmp(name, "delay")) {
1095 len = num_arg(&user_buffer[i], 10, &value);
1096 if (len < 0)
1097 return len;
1098
1099 i += len;
1100 if (value == 0x7FFFFFFF)
1101 pkt_dev->delay = ULLONG_MAX;
1102 else
1103 pkt_dev->delay = (u64)value;
1104
1105 sprintf(pg_result, "OK: delay=%llu",
1106 (unsigned long long) pkt_dev->delay);
1107 return count;
1108 }
1109 if (!strcmp(name, "rate")) {
1110 len = num_arg(&user_buffer[i], 10, &value);
1111 if (len < 0)
1112 return len;
1113
1114 i += len;
1115 if (!value)
1116 return len;
1117 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
1118 if (debug)
1119 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1120
1121 sprintf(pg_result, "OK: rate=%lu", value);
1122 return count;
1123 }
1124 if (!strcmp(name, "ratep")) {
1125 len = num_arg(&user_buffer[i], 10, &value);
1126 if (len < 0)
1127 return len;
1128
1129 i += len;
1130 if (!value)
1131 return len;
1132 pkt_dev->delay = NSEC_PER_SEC/value;
1133 if (debug)
1134 pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
1135
1136 sprintf(pg_result, "OK: rate=%lu", value);
1137 return count;
1138 }
1139 if (!strcmp(name, "udp_src_min")) {
1140 len = num_arg(&user_buffer[i], 10, &value);
1141 if (len < 0)
1142 return len;
1143
1144 i += len;
1145 if (value != pkt_dev->udp_src_min) {
1146 pkt_dev->udp_src_min = value;
1147 pkt_dev->cur_udp_src = value;
1148 }
1149 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
1150 return count;
1151 }
1152 if (!strcmp(name, "udp_dst_min")) {
1153 len = num_arg(&user_buffer[i], 10, &value);
1154 if (len < 0)
1155 return len;
1156
1157 i += len;
1158 if (value != pkt_dev->udp_dst_min) {
1159 pkt_dev->udp_dst_min = value;
1160 pkt_dev->cur_udp_dst = value;
1161 }
1162 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1163 return count;
1164 }
1165 if (!strcmp(name, "udp_src_max")) {
1166 len = num_arg(&user_buffer[i], 10, &value);
1167 if (len < 0)
1168 return len;
1169
1170 i += len;
1171 if (value != pkt_dev->udp_src_max) {
1172 pkt_dev->udp_src_max = value;
1173 pkt_dev->cur_udp_src = value;
1174 }
1175 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1176 return count;
1177 }
1178 if (!strcmp(name, "udp_dst_max")) {
1179 len = num_arg(&user_buffer[i], 10, &value);
1180 if (len < 0)
1181 return len;
1182
1183 i += len;
1184 if (value != pkt_dev->udp_dst_max) {
1185 pkt_dev->udp_dst_max = value;
1186 pkt_dev->cur_udp_dst = value;
1187 }
1188 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1189 return count;
1190 }
1191 if (!strcmp(name, "clone_skb")) {
1192 len = num_arg(&user_buffer[i], 10, &value);
1193 if (len < 0)
1194 return len;
1195 /* clone_skb is not supported for netif_receive xmit_mode and
1196 * IMIX mode.
1197 */
1198 if ((value > 0) &&
1199 ((pkt_dev->xmit_mode == M_NETIF_RECEIVE) ||
1200 !(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
1201 return -ENOTSUPP;
1202 if (value > 0 && (pkt_dev->n_imix_entries > 0 ||
1203 !(pkt_dev->flags & F_SHARED)))
1204 return -EINVAL;
1205
1206 i += len;
1207 pkt_dev->clone_skb = value;
1208
1209 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1210 return count;
1211 }
1212 if (!strcmp(name, "count")) {
1213 len = num_arg(&user_buffer[i], 10, &value);
1214 if (len < 0)
1215 return len;
1216
1217 i += len;
1218 pkt_dev->count = value;
1219 sprintf(pg_result, "OK: count=%llu",
1220 (unsigned long long)pkt_dev->count);
1221 return count;
1222 }
1223 if (!strcmp(name, "src_mac_count")) {
1224 len = num_arg(&user_buffer[i], 10, &value);
1225 if (len < 0)
1226 return len;
1227
1228 i += len;
1229 if (pkt_dev->src_mac_count != value) {
1230 pkt_dev->src_mac_count = value;
1231 pkt_dev->cur_src_mac_offset = 0;
1232 }
1233 sprintf(pg_result, "OK: src_mac_count=%d",
1234 pkt_dev->src_mac_count);
1235 return count;
1236 }
1237 if (!strcmp(name, "dst_mac_count")) {
1238 len = num_arg(&user_buffer[i], 10, &value);
1239 if (len < 0)
1240 return len;
1241
1242 i += len;
1243 if (pkt_dev->dst_mac_count != value) {
1244 pkt_dev->dst_mac_count = value;
1245 pkt_dev->cur_dst_mac_offset = 0;
1246 }
1247 sprintf(pg_result, "OK: dst_mac_count=%d",
1248 pkt_dev->dst_mac_count);
1249 return count;
1250 }
1251 if (!strcmp(name, "burst")) {
1252 len = num_arg(&user_buffer[i], 10, &value);
1253 if (len < 0)
1254 return len;
1255
1256 i += len;
1257 if ((value > 1) &&
1258 ((pkt_dev->xmit_mode == M_QUEUE_XMIT) ||
1259 ((pkt_dev->xmit_mode == M_START_XMIT) &&
1260 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))))
1261 return -ENOTSUPP;
1262
1263 if (value > 1 && !(pkt_dev->flags & F_SHARED))
1264 return -EINVAL;
1265
1266 pkt_dev->burst = value < 1 ? 1 : value;
1267 sprintf(pg_result, "OK: burst=%u", pkt_dev->burst);
1268 return count;
1269 }
1270 if (!strcmp(name, "node")) {
1271 len = num_arg(&user_buffer[i], 10, &value);
1272 if (len < 0)
1273 return len;
1274
1275 i += len;
1276
1277 if (node_possible(value)) {
1278 pkt_dev->node = value;
1279 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1280 if (pkt_dev->page) {
1281 put_page(pkt_dev->page);
1282 pkt_dev->page = NULL;
1283 }
1284 }
1285 else
1286 sprintf(pg_result, "ERROR: node not possible");
1287 return count;
1288 }
1289 if (!strcmp(name, "xmit_mode")) {
1290 char f[32];
1291
1292 memset(f, 0, 32);
1293 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1294 if (len < 0)
1295 return len;
1296
1297 if (copy_from_user(f, &user_buffer[i], len))
1298 return -EFAULT;
1299 i += len;
1300
1301 if (strcmp(f, "start_xmit") == 0) {
1302 pkt_dev->xmit_mode = M_START_XMIT;
1303 } else if (strcmp(f, "netif_receive") == 0) {
1304 /* clone_skb set earlier, not supported in this mode */
1305 if (pkt_dev->clone_skb > 0)
1306 return -ENOTSUPP;
1307
1308 pkt_dev->xmit_mode = M_NETIF_RECEIVE;
1309
1310 /* make sure new packet is allocated every time
1311 * pktgen_xmit() is called
1312 */
1313 pkt_dev->last_ok = 1;
1314 } else if (strcmp(f, "queue_xmit") == 0) {
1315 pkt_dev->xmit_mode = M_QUEUE_XMIT;
1316 pkt_dev->last_ok = 1;
1317 } else {
1318 sprintf(pg_result,
1319 "xmit_mode -:%s:- unknown\nAvailable modes: %s",
1320 f, "start_xmit, netif_receive\n");
1321 return count;
1322 }
1323 sprintf(pg_result, "OK: xmit_mode=%s", f);
1324 return count;
1325 }
1326 if (!strcmp(name, "flag")) {
1327 bool disable = false;
1328 __u32 flag;
1329 char f[32];
1330 char *end;
1331
1332 memset(f, 0, 32);
1333 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1334 if (len < 0)
1335 return len;
1336
1337 if (copy_from_user(f, &user_buffer[i], len))
1338 return -EFAULT;
1339 i += len;
1340
1341 flag = pktgen_read_flag(f, &disable);
1342 if (flag) {
1343 if (disable) {
1344 /* If "clone_skb", or "burst" parameters are
1345 * configured, it means that the skb still
1346 * needs to be referenced by the pktgen, so
1347 * the skb must be shared.
1348 */
1349 if (flag == F_SHARED && (pkt_dev->clone_skb ||
1350 pkt_dev->burst > 1))
1351 return -EINVAL;
1352 pkt_dev->flags &= ~flag;
1353 } else {
1354 pkt_dev->flags |= flag;
1355 }
1356
1357 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1358 return count;
1359 }
1360
1361 /* Unknown flag */
1362 end = pkt_dev->result + sizeof(pkt_dev->result);
1363 pg_result += sprintf(pg_result,
1364 "Flag -:%s:- unknown\n"
1365 "Available flags, (prepend ! to un-set flag):\n", f);
1366
1367 for (int n = 0; n < NR_PKT_FLAGS && pg_result < end; n++) {
1368 if (!IS_ENABLED(CONFIG_XFRM) && n == IPSEC_SHIFT)
1369 continue;
1370 pg_result += snprintf(pg_result, end - pg_result,
1371 "%s, ", pkt_flag_names[n]);
1372 }
1373 if (!WARN_ON_ONCE(pg_result >= end)) {
1374 /* Remove the comma and whitespace at the end */
1375 *(pg_result - 2) = '\0';
1376 }
1377
1378 return count;
1379 }
1380 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1381 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1382 if (len < 0)
1383 return len;
1384
1385 if (copy_from_user(buf, &user_buffer[i], len))
1386 return -EFAULT;
1387 buf[len] = 0;
1388 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1389 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1390 strcpy(pkt_dev->dst_min, buf);
1391 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1392 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1393 }
1394 if (debug)
1395 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
1396 i += len;
1397 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1398 return count;
1399 }
1400 if (!strcmp(name, "dst_max")) {
1401 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1402 if (len < 0)
1403 return len;
1404
1405 if (copy_from_user(buf, &user_buffer[i], len))
1406 return -EFAULT;
1407 buf[len] = 0;
1408 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1409 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1410 strcpy(pkt_dev->dst_max, buf);
1411 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1412 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1413 }
1414 if (debug)
1415 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
1416 i += len;
1417 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1418 return count;
1419 }
1420 if (!strcmp(name, "dst6")) {
1421 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1422 if (len < 0)
1423 return len;
1424
1425 pkt_dev->flags |= F_IPV6;
1426
1427 if (copy_from_user(buf, &user_buffer[i], len))
1428 return -EFAULT;
1429 buf[len] = 0;
1430
1431 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
1432 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
1433
1434 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
1435
1436 if (debug)
1437 pr_debug("dst6 set to: %s\n", buf);
1438
1439 i += len;
1440 sprintf(pg_result, "OK: dst6=%s", buf);
1441 return count;
1442 }
1443 if (!strcmp(name, "dst6_min")) {
1444 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1445 if (len < 0)
1446 return len;
1447
1448 pkt_dev->flags |= F_IPV6;
1449
1450 if (copy_from_user(buf, &user_buffer[i], len))
1451 return -EFAULT;
1452 buf[len] = 0;
1453
1454 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
1455 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
1456
1457 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
1458 if (debug)
1459 pr_debug("dst6_min set to: %s\n", buf);
1460
1461 i += len;
1462 sprintf(pg_result, "OK: dst6_min=%s", buf);
1463 return count;
1464 }
1465 if (!strcmp(name, "dst6_max")) {
1466 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1467 if (len < 0)
1468 return len;
1469
1470 pkt_dev->flags |= F_IPV6;
1471
1472 if (copy_from_user(buf, &user_buffer[i], len))
1473 return -EFAULT;
1474 buf[len] = 0;
1475
1476 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
1477 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
1478
1479 if (debug)
1480 pr_debug("dst6_max set to: %s\n", buf);
1481
1482 i += len;
1483 sprintf(pg_result, "OK: dst6_max=%s", buf);
1484 return count;
1485 }
1486 if (!strcmp(name, "src6")) {
1487 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1488 if (len < 0)
1489 return len;
1490
1491 pkt_dev->flags |= F_IPV6;
1492
1493 if (copy_from_user(buf, &user_buffer[i], len))
1494 return -EFAULT;
1495 buf[len] = 0;
1496
1497 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
1498 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
1499
1500 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
1501
1502 if (debug)
1503 pr_debug("src6 set to: %s\n", buf);
1504
1505 i += len;
1506 sprintf(pg_result, "OK: src6=%s", buf);
1507 return count;
1508 }
1509 if (!strcmp(name, "src_min")) {
1510 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1511 if (len < 0)
1512 return len;
1513
1514 if (copy_from_user(buf, &user_buffer[i], len))
1515 return -EFAULT;
1516 buf[len] = 0;
1517 if (strcmp(buf, pkt_dev->src_min) != 0) {
1518 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1519 strcpy(pkt_dev->src_min, buf);
1520 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1521 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1522 }
1523 if (debug)
1524 pr_debug("src_min set to: %s\n", pkt_dev->src_min);
1525 i += len;
1526 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1527 return count;
1528 }
1529 if (!strcmp(name, "src_max")) {
1530 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1531 if (len < 0)
1532 return len;
1533
1534 if (copy_from_user(buf, &user_buffer[i], len))
1535 return -EFAULT;
1536 buf[len] = 0;
1537 if (strcmp(buf, pkt_dev->src_max) != 0) {
1538 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1539 strcpy(pkt_dev->src_max, buf);
1540 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1541 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1542 }
1543 if (debug)
1544 pr_debug("src_max set to: %s\n", pkt_dev->src_max);
1545 i += len;
1546 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1547 return count;
1548 }
1549 if (!strcmp(name, "dst_mac")) {
1550 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1551 if (len < 0)
1552 return len;
1553
1554 memset(valstr, 0, sizeof(valstr));
1555 if (copy_from_user(valstr, &user_buffer[i], len))
1556 return -EFAULT;
1557
1558 if (!mac_pton(valstr, pkt_dev->dst_mac))
1559 return -EINVAL;
1560 /* Set up Dest MAC */
1561 ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac);
1562
1563 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
1564 return count;
1565 }
1566 if (!strcmp(name, "src_mac")) {
1567 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1568 if (len < 0)
1569 return len;
1570
1571 memset(valstr, 0, sizeof(valstr));
1572 if (copy_from_user(valstr, &user_buffer[i], len))
1573 return -EFAULT;
1574
1575 if (!mac_pton(valstr, pkt_dev->src_mac))
1576 return -EINVAL;
1577 /* Set up Src MAC */
1578 ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac);
1579
1580 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
1581 return count;
1582 }
1583
1584 if (!strcmp(name, "clear_counters")) {
1585 pktgen_clear_counters(pkt_dev);
1586 sprintf(pg_result, "OK: Clearing counters.\n");
1587 return count;
1588 }
1589
1590 if (!strcmp(name, "flows")) {
1591 len = num_arg(&user_buffer[i], 10, &value);
1592 if (len < 0)
1593 return len;
1594
1595 i += len;
1596 if (value > MAX_CFLOWS)
1597 value = MAX_CFLOWS;
1598
1599 pkt_dev->cflows = value;
1600 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1601 return count;
1602 }
1603 #ifdef CONFIG_XFRM
1604 if (!strcmp(name, "spi")) {
1605 len = num_arg(&user_buffer[i], 10, &value);
1606 if (len < 0)
1607 return len;
1608
1609 i += len;
1610 pkt_dev->spi = value;
1611 sprintf(pg_result, "OK: spi=%u", pkt_dev->spi);
1612 return count;
1613 }
1614 #endif
1615 if (!strcmp(name, "flowlen")) {
1616 len = num_arg(&user_buffer[i], 10, &value);
1617 if (len < 0)
1618 return len;
1619
1620 i += len;
1621 pkt_dev->lflow = value;
1622 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1623 return count;
1624 }
1625
1626 if (!strcmp(name, "queue_map_min")) {
1627 len = num_arg(&user_buffer[i], 5, &value);
1628 if (len < 0)
1629 return len;
1630
1631 i += len;
1632 pkt_dev->queue_map_min = value;
1633 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1634 return count;
1635 }
1636
1637 if (!strcmp(name, "queue_map_max")) {
1638 len = num_arg(&user_buffer[i], 5, &value);
1639 if (len < 0)
1640 return len;
1641
1642 i += len;
1643 pkt_dev->queue_map_max = value;
1644 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1645 return count;
1646 }
1647
1648 if (!strcmp(name, "mpls")) {
1649 unsigned int n, cnt;
1650
1651 len = get_labels(&user_buffer[i], pkt_dev);
1652 if (len < 0)
1653 return len;
1654 i += len;
1655 cnt = sprintf(pg_result, "OK: mpls=");
1656 for (n = 0; n < pkt_dev->nr_labels; n++)
1657 cnt += sprintf(pg_result + cnt,
1658 "%08x%s", ntohl(pkt_dev->labels[n]),
1659 n == pkt_dev->nr_labels-1 ? "" : ",");
1660
1661 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1662 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1663 pkt_dev->svlan_id = 0xffff;
1664
1665 if (debug)
1666 pr_debug("VLAN/SVLAN auto turned off\n");
1667 }
1668 return count;
1669 }
1670
1671 if (!strcmp(name, "vlan_id")) {
1672 len = num_arg(&user_buffer[i], 4, &value);
1673 if (len < 0)
1674 return len;
1675
1676 i += len;
1677 if (value <= 4095) {
1678 pkt_dev->vlan_id = value; /* turn on VLAN */
1679
1680 if (debug)
1681 pr_debug("VLAN turned on\n");
1682
1683 if (debug && pkt_dev->nr_labels)
1684 pr_debug("MPLS auto turned off\n");
1685
1686 pkt_dev->nr_labels = 0; /* turn off MPLS */
1687 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1688 } else {
1689 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1690 pkt_dev->svlan_id = 0xffff;
1691
1692 if (debug)
1693 pr_debug("VLAN/SVLAN turned off\n");
1694 }
1695 return count;
1696 }
1697
1698 if (!strcmp(name, "vlan_p")) {
1699 len = num_arg(&user_buffer[i], 1, &value);
1700 if (len < 0)
1701 return len;
1702
1703 i += len;
1704 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1705 pkt_dev->vlan_p = value;
1706 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1707 } else {
1708 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1709 }
1710 return count;
1711 }
1712
1713 if (!strcmp(name, "vlan_cfi")) {
1714 len = num_arg(&user_buffer[i], 1, &value);
1715 if (len < 0)
1716 return len;
1717
1718 i += len;
1719 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1720 pkt_dev->vlan_cfi = value;
1721 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1722 } else {
1723 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1724 }
1725 return count;
1726 }
1727
1728 if (!strcmp(name, "svlan_id")) {
1729 len = num_arg(&user_buffer[i], 4, &value);
1730 if (len < 0)
1731 return len;
1732
1733 i += len;
1734 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1735 pkt_dev->svlan_id = value; /* turn on SVLAN */
1736
1737 if (debug)
1738 pr_debug("SVLAN turned on\n");
1739
1740 if (debug && pkt_dev->nr_labels)
1741 pr_debug("MPLS auto turned off\n");
1742
1743 pkt_dev->nr_labels = 0; /* turn off MPLS */
1744 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1745 } else {
1746 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1747 pkt_dev->svlan_id = 0xffff;
1748
1749 if (debug)
1750 pr_debug("VLAN/SVLAN turned off\n");
1751 }
1752 return count;
1753 }
1754
1755 if (!strcmp(name, "svlan_p")) {
1756 len = num_arg(&user_buffer[i], 1, &value);
1757 if (len < 0)
1758 return len;
1759
1760 i += len;
1761 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1762 pkt_dev->svlan_p = value;
1763 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1764 } else {
1765 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1766 }
1767 return count;
1768 }
1769
1770 if (!strcmp(name, "svlan_cfi")) {
1771 len = num_arg(&user_buffer[i], 1, &value);
1772 if (len < 0)
1773 return len;
1774
1775 i += len;
1776 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1777 pkt_dev->svlan_cfi = value;
1778 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1779 } else {
1780 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1781 }
1782 return count;
1783 }
1784
1785 if (!strcmp(name, "tos")) {
1786 __u32 tmp_value = 0;
1787 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1788 if (len < 0)
1789 return len;
1790
1791 i += len;
1792 if (len == 2) {
1793 pkt_dev->tos = tmp_value;
1794 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1795 } else {
1796 sprintf(pg_result, "ERROR: tos must be 00-ff");
1797 }
1798 return count;
1799 }
1800
1801 if (!strcmp(name, "traffic_class")) {
1802 __u32 tmp_value = 0;
1803 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1804 if (len < 0)
1805 return len;
1806
1807 i += len;
1808 if (len == 2) {
1809 pkt_dev->traffic_class = tmp_value;
1810 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1811 } else {
1812 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1813 }
1814 return count;
1815 }
1816
1817 if (!strcmp(name, "skb_priority")) {
1818 len = num_arg(&user_buffer[i], 9, &value);
1819 if (len < 0)
1820 return len;
1821
1822 i += len;
1823 pkt_dev->skb_priority = value;
1824 sprintf(pg_result, "OK: skb_priority=%i",
1825 pkt_dev->skb_priority);
1826 return count;
1827 }
1828
1829 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1830 return -EINVAL;
1831 }
1832
1833 static int pktgen_if_open(struct inode *inode, struct file *file)
1834 {
1835 return single_open(file, pktgen_if_show, pde_data(inode));
1836 }
1837
1838 static const struct proc_ops pktgen_if_proc_ops = {
1839 .proc_open = pktgen_if_open,
1840 .proc_read = seq_read,
1841 .proc_lseek = seq_lseek,
1842 .proc_write = pktgen_if_write,
1843 .proc_release = single_release,
1844 };
1845
1846 static int pktgen_thread_show(struct seq_file *seq, void *v)
1847 {
1848 struct pktgen_thread *t = seq->private;
1849 const struct pktgen_dev *pkt_dev;
1850
1851 BUG_ON(!t);
1852
1853 seq_puts(seq, "Running: ");
1854
1855 rcu_read_lock();
1856 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1857 if (pkt_dev->running)
1858 seq_printf(seq, "%s ", pkt_dev->odevname);
1859
1860 seq_puts(seq, "\nStopped: ");
1861
1862 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
1863 if (!pkt_dev->running)
1864 seq_printf(seq, "%s ", pkt_dev->odevname);
1865
1866 if (t->result[0])
1867 seq_printf(seq, "\nResult: %s\n", t->result);
1868 else
1869 seq_puts(seq, "\nResult: NA\n");
1870
1871 rcu_read_unlock();
1872
1873 return 0;
1874 }
1875
1876 static ssize_t pktgen_thread_write(struct file *file,
1877 const char __user * user_buffer,
1878 size_t count, loff_t * offset)
1879 {
1880 struct seq_file *seq = file->private_data;
1881 struct pktgen_thread *t = seq->private;
1882 int i, max, len, ret;
1883 char name[40];
1884 char *pg_result;
1885
1886 if (count < 1) {
1887 // sprintf(pg_result, "Wrong command format");
1888 return -EINVAL;
1889 }
1890
1891 max = count;
1892 len = count_trail_chars(user_buffer, max);
1893 if (len < 0)
1894 return len;
1895
1896 i = len;
1897
1898 /* Read variable name */
1899
1900 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1901 if (len < 0)
1902 return len;
1903
1904 memset(name, 0, sizeof(name));
1905 if (copy_from_user(name, &user_buffer[i], len))
1906 return -EFAULT;
1907 i += len;
1908
1909 max = count - i;
1910 len = count_trail_chars(&user_buffer[i], max);
1911 if (len < 0)
1912 return len;
1913
1914 i += len;
1915
1916 if (debug)
1917 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
1918
1919 if (!t) {
1920 pr_err("ERROR: No thread\n");
1921 ret = -EINVAL;
1922 goto out;
1923 }
1924
1925 pg_result = &(t->result[0]);
1926
1927 if (!strcmp(name, "add_device")) {
1928 char f[32];
1929 memset(f, 0, 32);
1930 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1931 if (len < 0) {
1932 ret = len;
1933 goto out;
1934 }
1935 if (copy_from_user(f, &user_buffer[i], len))
1936 return -EFAULT;
1937 i += len;
1938 mutex_lock(&pktgen_thread_lock);
1939 ret = pktgen_add_device(t, f);
1940 mutex_unlock(&pktgen_thread_lock);
1941 if (!ret) {
1942 ret = count;
1943 sprintf(pg_result, "OK: add_device=%s", f);
1944 } else
1945 sprintf(pg_result, "ERROR: can not add device %s", f);
1946 goto out;
1947 }
1948
1949 if (!strcmp(name, "rem_device_all")) {
1950 mutex_lock(&pktgen_thread_lock);
1951 t->control |= T_REMDEVALL;
1952 mutex_unlock(&pktgen_thread_lock);
1953 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1954 ret = count;
1955 sprintf(pg_result, "OK: rem_device_all");
1956 goto out;
1957 }
1958
1959 if (!strcmp(name, "max_before_softirq")) {
1960 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1961 ret = count;
1962 goto out;
1963 }
1964
1965 ret = -EINVAL;
1966 out:
1967 return ret;
1968 }
1969
1970 static int pktgen_thread_open(struct inode *inode, struct file *file)
1971 {
1972 return single_open(file, pktgen_thread_show, pde_data(inode));
1973 }
1974
1975 static const struct proc_ops pktgen_thread_proc_ops = {
1976 .proc_open = pktgen_thread_open,
1977 .proc_read = seq_read,
1978 .proc_lseek = seq_lseek,
1979 .proc_write = pktgen_thread_write,
1980 .proc_release = single_release,
1981 };
1982
1983 /* Think find or remove for NN */
1984 static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn,
1985 const char *ifname, int remove)
1986 {
1987 struct pktgen_thread *t;
1988 struct pktgen_dev *pkt_dev = NULL;
1989 bool exact = (remove == FIND);
1990
1991 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
1992 pkt_dev = pktgen_find_dev(t, ifname, exact);
1993 if (pkt_dev) {
1994 if (remove) {
1995 pkt_dev->removal_mark = 1;
1996 t->control |= T_REMDEV;
1997 }
1998 break;
1999 }
2000 }
2001 return pkt_dev;
2002 }
2003
2004 /*
2005 * mark a device for removal
2006 */
2007 static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname)
2008 {
2009 struct pktgen_dev *pkt_dev = NULL;
2010 const int max_tries = 10, msec_per_try = 125;
2011 int i = 0;
2012
2013 mutex_lock(&pktgen_thread_lock);
2014 pr_debug("%s: marking %s for removal\n", __func__, ifname);
2015
2016 while (1) {
2017
2018 pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE);
2019 if (pkt_dev == NULL)
2020 break; /* success */
2021
2022 mutex_unlock(&pktgen_thread_lock);
2023 pr_debug("%s: waiting for %s to disappear....\n",
2024 __func__, ifname);
2025 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
2026 mutex_lock(&pktgen_thread_lock);
2027
2028 if (++i >= max_tries) {
2029 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
2030 __func__, msec_per_try * i, ifname);
2031 break;
2032 }
2033
2034 }
2035
2036 mutex_unlock(&pktgen_thread_lock);
2037 }
2038
2039 static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev)
2040 {
2041 struct pktgen_thread *t;
2042
2043 mutex_lock(&pktgen_thread_lock);
2044
2045 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
2046 struct pktgen_dev *pkt_dev;
2047
2048 if_lock(t);
2049 list_for_each_entry(pkt_dev, &t->if_list, list) {
2050 if (pkt_dev->odev != dev)
2051 continue;
2052
2053 proc_remove(pkt_dev->entry);
2054
2055 pkt_dev->entry = proc_create_data(dev->name, 0600,
2056 pn->proc_dir,
2057 &pktgen_if_proc_ops,
2058 pkt_dev);
2059 if (!pkt_dev->entry)
2060 pr_err("can't move proc entry for '%s'\n",
2061 dev->name);
2062 break;
2063 }
2064 if_unlock(t);
2065 }
2066 mutex_unlock(&pktgen_thread_lock);
2067 }
2068
2069 static int pktgen_device_event(struct notifier_block *unused,
2070 unsigned long event, void *ptr)
2071 {
2072 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2073 struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id);
2074
2075 if (pn->pktgen_exiting)
2076 return NOTIFY_DONE;
2077
2078 /* It is OK that we do not hold the group lock right now,
2079 * as we run under the RTNL lock.
2080 */
2081
2082 switch (event) {
2083 case NETDEV_CHANGENAME:
2084 pktgen_change_name(pn, dev);
2085 break;
2086
2087 case NETDEV_UNREGISTER:
2088 pktgen_mark_device(pn, dev->name);
2089 break;
2090 }
2091
2092 return NOTIFY_DONE;
2093 }
2094
2095 static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn,
2096 struct pktgen_dev *pkt_dev,
2097 const char *ifname)
2098 {
2099 char b[IFNAMSIZ+5];
2100 int i;
2101
2102 for (i = 0; ifname[i] != '@'; i++) {
2103 if (i == IFNAMSIZ)
2104 break;
2105
2106 b[i] = ifname[i];
2107 }
2108 b[i] = 0;
2109
2110 return dev_get_by_name(pn->net, b);
2111 }
2112
2113
2114 /* Associate pktgen_dev with a device. */
2115
2116 static int pktgen_setup_dev(const struct pktgen_net *pn,
2117 struct pktgen_dev *pkt_dev, const char *ifname)
2118 {
2119 struct net_device *odev;
2120 int err;
2121
2122 /* Clean old setups */
2123 if (pkt_dev->odev) {
2124 netdev_put(pkt_dev->odev, &pkt_dev->dev_tracker);
2125 pkt_dev->odev = NULL;
2126 }
2127
2128 odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname);
2129 if (!odev) {
2130 pr_err("no such netdevice: \"%s\"\n", ifname);
2131 return -ENODEV;
2132 }
2133
2134 if (odev->type != ARPHRD_ETHER && odev->type != ARPHRD_LOOPBACK) {
2135 pr_err("not an ethernet or loopback device: \"%s\"\n", ifname);
2136 err = -EINVAL;
2137 } else if (!netif_running(odev)) {
2138 pr_err("device is down: \"%s\"\n", ifname);
2139 err = -ENETDOWN;
2140 } else {
2141 pkt_dev->odev = odev;
2142 netdev_tracker_alloc(odev, &pkt_dev->dev_tracker, GFP_KERNEL);
2143 return 0;
2144 }
2145
2146 dev_put(odev);
2147 return err;
2148 }
2149
2150 /* Read pkt_dev from the interface and set up internal pktgen_dev
2151 * structure to have the right information to create/send packets
2152 */
2153 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2154 {
2155 int ntxq;
2156
2157 if (!pkt_dev->odev) {
2158 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
2159 sprintf(pkt_dev->result,
2160 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2161 return;
2162 }
2163
2164 /* make sure that we don't pick a non-existing transmit queue */
2165 ntxq = pkt_dev->odev->real_num_tx_queues;
2166
2167 if (ntxq <= pkt_dev->queue_map_min) {
2168 pr_warn("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2169 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2170 pkt_dev->odevname);
2171 pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
2172 }
2173 if (pkt_dev->queue_map_max >= ntxq) {
2174 pr_warn("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
2175 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2176 pkt_dev->odevname);
2177 pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
2178 }
2179
2180 /* Default to the interface's mac if not explicitly set. */
2181
2182 if (is_zero_ether_addr(pkt_dev->src_mac))
2183 ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr);
2184
2185 /* Set up Dest MAC */
2186 ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac);
2187
2188 if (pkt_dev->flags & F_IPV6) {
2189 int i, set = 0, err = 1;
2190 struct inet6_dev *idev;
2191
2192 if (pkt_dev->min_pkt_size == 0) {
2193 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
2194 + sizeof(struct udphdr)
2195 + sizeof(struct pktgen_hdr)
2196 + pkt_dev->pkt_overhead;
2197 }
2198
2199 for (i = 0; i < sizeof(struct in6_addr); i++)
2200 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2201 set = 1;
2202 break;
2203 }
2204
2205 if (!set) {
2206
2207 /*
2208 * Use linklevel address if unconfigured.
2209 *
2210 * use ipv6_get_lladdr if/when it's get exported
2211 */
2212
2213 rcu_read_lock();
2214 idev = __in6_dev_get(pkt_dev->odev);
2215 if (idev) {
2216 struct inet6_ifaddr *ifp;
2217
2218 read_lock_bh(&idev->lock);
2219 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2220 if ((ifp->scope & IFA_LINK) &&
2221 !(ifp->flags & IFA_F_TENTATIVE)) {
2222 pkt_dev->cur_in6_saddr = ifp->addr;
2223 err = 0;
2224 break;
2225 }
2226 }
2227 read_unlock_bh(&idev->lock);
2228 }
2229 rcu_read_unlock();
2230 if (err)
2231 pr_err("ERROR: IPv6 link address not available\n");
2232 }
2233 } else {
2234 if (pkt_dev->min_pkt_size == 0) {
2235 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
2236 + sizeof(struct udphdr)
2237 + sizeof(struct pktgen_hdr)
2238 + pkt_dev->pkt_overhead;
2239 }
2240
2241 pkt_dev->saddr_min = 0;
2242 pkt_dev->saddr_max = 0;
2243 if (strlen(pkt_dev->src_min) == 0) {
2244
2245 struct in_device *in_dev;
2246
2247 rcu_read_lock();
2248 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2249 if (in_dev) {
2250 const struct in_ifaddr *ifa;
2251
2252 ifa = rcu_dereference(in_dev->ifa_list);
2253 if (ifa) {
2254 pkt_dev->saddr_min = ifa->ifa_address;
2255 pkt_dev->saddr_max = pkt_dev->saddr_min;
2256 }
2257 }
2258 rcu_read_unlock();
2259 } else {
2260 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2261 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2262 }
2263
2264 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2265 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2266 }
2267 /* Initialize current values. */
2268 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2269 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
2270 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
2271
2272 pkt_dev->cur_dst_mac_offset = 0;
2273 pkt_dev->cur_src_mac_offset = 0;
2274 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2275 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2276 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2277 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2278 pkt_dev->nflows = 0;
2279 }
2280
2281
2282 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2283 {
2284 ktime_t start_time, end_time;
2285 s64 remaining;
2286 struct hrtimer_sleeper t;
2287
2288 hrtimer_init_sleeper_on_stack(&t, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2289 hrtimer_set_expires(&t.timer, spin_until);
2290
2291 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
2292 if (remaining <= 0)
2293 goto out;
2294
2295 start_time = ktime_get();
2296 if (remaining < 100000) {
2297 /* for small delays (<100us), just loop until limit is reached */
2298 do {
2299 end_time = ktime_get();
2300 } while (ktime_compare(end_time, spin_until) < 0);
2301 } else {
2302 do {
2303 set_current_state(TASK_INTERRUPTIBLE);
2304 hrtimer_sleeper_start_expires(&t, HRTIMER_MODE_ABS);
2305
2306 if (likely(t.task))
2307 schedule();
2308
2309 hrtimer_cancel(&t.timer);
2310 } while (t.task && pkt_dev->running && !signal_pending(current));
2311 __set_current_state(TASK_RUNNING);
2312 end_time = ktime_get();
2313 }
2314
2315 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2316 out:
2317 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2318 destroy_hrtimer_on_stack(&t.timer);
2319 }
2320
2321 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2322 {
2323 pkt_dev->pkt_overhead = 0;
2324 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2325 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2326 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2327 }
2328
2329 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2330 {
2331 return !!(pkt_dev->flows[flow].flags & F_INIT);
2332 }
2333
2334 static inline int f_pick(struct pktgen_dev *pkt_dev)
2335 {
2336 int flow = pkt_dev->curfl;
2337
2338 if (pkt_dev->flags & F_FLOW_SEQ) {
2339 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2340 /* reset time */
2341 pkt_dev->flows[flow].count = 0;
2342 pkt_dev->flows[flow].flags = 0;
2343 pkt_dev->curfl += 1;
2344 if (pkt_dev->curfl >= pkt_dev->cflows)
2345 pkt_dev->curfl = 0; /*reset */
2346 }
2347 } else {
2348 flow = get_random_u32_below(pkt_dev->cflows);
2349 pkt_dev->curfl = flow;
2350
2351 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2352 pkt_dev->flows[flow].count = 0;
2353 pkt_dev->flows[flow].flags = 0;
2354 }
2355 }
2356
2357 return pkt_dev->curfl;
2358 }
2359
2360
2361 #ifdef CONFIG_XFRM
2362 /* If there was already an IPSEC SA, we keep it as is, else
2363 * we go look for it ...
2364 */
2365 #define DUMMY_MARK 0
2366 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2367 {
2368 struct xfrm_state *x = pkt_dev->flows[flow].x;
2369 struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
2370 if (!x) {
2371
2372 if (pkt_dev->spi) {
2373 /* We need as quick as possible to find the right SA
2374 * Searching with minimum criteria to archieve this.
2375 */
2376 x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET);
2377 } else {
2378 /* slow path: we dont already have xfrm_state */
2379 x = xfrm_stateonly_find(pn->net, DUMMY_MARK, 0,
2380 (xfrm_address_t *)&pkt_dev->cur_daddr,
2381 (xfrm_address_t *)&pkt_dev->cur_saddr,
2382 AF_INET,
2383 pkt_dev->ipsmode,
2384 pkt_dev->ipsproto, 0);
2385 }
2386 if (x) {
2387 pkt_dev->flows[flow].x = x;
2388 set_pkt_overhead(pkt_dev);
2389 pkt_dev->pkt_overhead += x->props.header_len;
2390 }
2391
2392 }
2393 }
2394 #endif
2395 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2396 {
2397
2398 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2399 pkt_dev->cur_queue_map = smp_processor_id();
2400
2401 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2402 __u16 t;
2403 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2404 t = get_random_u32_inclusive(pkt_dev->queue_map_min,
2405 pkt_dev->queue_map_max);
2406 } else {
2407 t = pkt_dev->cur_queue_map + 1;
2408 if (t > pkt_dev->queue_map_max)
2409 t = pkt_dev->queue_map_min;
2410 }
2411 pkt_dev->cur_queue_map = t;
2412 }
2413 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2414 }
2415
2416 /* Increment/randomize headers according to flags and current values
2417 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2418 */
2419 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2420 {
2421 __u32 imn;
2422 __u32 imx;
2423 int flow = 0;
2424
2425 if (pkt_dev->cflows)
2426 flow = f_pick(pkt_dev);
2427
2428 /* Deal with source MAC */
2429 if (pkt_dev->src_mac_count > 1) {
2430 __u32 mc;
2431 __u32 tmp;
2432
2433 if (pkt_dev->flags & F_MACSRC_RND)
2434 mc = get_random_u32_below(pkt_dev->src_mac_count);
2435 else {
2436 mc = pkt_dev->cur_src_mac_offset++;
2437 if (pkt_dev->cur_src_mac_offset >=
2438 pkt_dev->src_mac_count)
2439 pkt_dev->cur_src_mac_offset = 0;
2440 }
2441
2442 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2443 pkt_dev->hh[11] = tmp;
2444 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2445 pkt_dev->hh[10] = tmp;
2446 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2447 pkt_dev->hh[9] = tmp;
2448 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2449 pkt_dev->hh[8] = tmp;
2450 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2451 pkt_dev->hh[7] = tmp;
2452 }
2453
2454 /* Deal with Destination MAC */
2455 if (pkt_dev->dst_mac_count > 1) {
2456 __u32 mc;
2457 __u32 tmp;
2458
2459 if (pkt_dev->flags & F_MACDST_RND)
2460 mc = get_random_u32_below(pkt_dev->dst_mac_count);
2461
2462 else {
2463 mc = pkt_dev->cur_dst_mac_offset++;
2464 if (pkt_dev->cur_dst_mac_offset >=
2465 pkt_dev->dst_mac_count) {
2466 pkt_dev->cur_dst_mac_offset = 0;
2467 }
2468 }
2469
2470 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2471 pkt_dev->hh[5] = tmp;
2472 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2473 pkt_dev->hh[4] = tmp;
2474 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2475 pkt_dev->hh[3] = tmp;
2476 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2477 pkt_dev->hh[2] = tmp;
2478 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2479 pkt_dev->hh[1] = tmp;
2480 }
2481
2482 if (pkt_dev->flags & F_MPLS_RND) {
2483 unsigned int i;
2484 for (i = 0; i < pkt_dev->nr_labels; i++)
2485 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2486 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2487 ((__force __be32)get_random_u32() &
2488 htonl(0x000fffff));
2489 }
2490
2491 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2492 pkt_dev->vlan_id = get_random_u32_below(4096);
2493 }
2494
2495 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2496 pkt_dev->svlan_id = get_random_u32_below(4096);
2497 }
2498
2499 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2500 if (pkt_dev->flags & F_UDPSRC_RND)
2501 pkt_dev->cur_udp_src = get_random_u32_inclusive(pkt_dev->udp_src_min,
2502 pkt_dev->udp_src_max - 1);
2503
2504 else {
2505 pkt_dev->cur_udp_src++;
2506 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2507 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2508 }
2509 }
2510
2511 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2512 if (pkt_dev->flags & F_UDPDST_RND) {
2513 pkt_dev->cur_udp_dst = get_random_u32_inclusive(pkt_dev->udp_dst_min,
2514 pkt_dev->udp_dst_max - 1);
2515 } else {
2516 pkt_dev->cur_udp_dst++;
2517 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2518 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2519 }
2520 }
2521
2522 if (!(pkt_dev->flags & F_IPV6)) {
2523
2524 imn = ntohl(pkt_dev->saddr_min);
2525 imx = ntohl(pkt_dev->saddr_max);
2526 if (imn < imx) {
2527 __u32 t;
2528 if (pkt_dev->flags & F_IPSRC_RND)
2529 t = get_random_u32_inclusive(imn, imx - 1);
2530 else {
2531 t = ntohl(pkt_dev->cur_saddr);
2532 t++;
2533 if (t > imx)
2534 t = imn;
2535
2536 }
2537 pkt_dev->cur_saddr = htonl(t);
2538 }
2539
2540 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2541 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2542 } else {
2543 imn = ntohl(pkt_dev->daddr_min);
2544 imx = ntohl(pkt_dev->daddr_max);
2545 if (imn < imx) {
2546 __u32 t;
2547 __be32 s;
2548 if (pkt_dev->flags & F_IPDST_RND) {
2549
2550 do {
2551 t = get_random_u32_inclusive(imn, imx - 1);
2552 s = htonl(t);
2553 } while (ipv4_is_loopback(s) ||
2554 ipv4_is_multicast(s) ||
2555 ipv4_is_lbcast(s) ||
2556 ipv4_is_zeronet(s) ||
2557 ipv4_is_local_multicast(s));
2558 pkt_dev->cur_daddr = s;
2559 } else {
2560 t = ntohl(pkt_dev->cur_daddr);
2561 t++;
2562 if (t > imx) {
2563 t = imn;
2564 }
2565 pkt_dev->cur_daddr = htonl(t);
2566 }
2567 }
2568 if (pkt_dev->cflows) {
2569 pkt_dev->flows[flow].flags |= F_INIT;
2570 pkt_dev->flows[flow].cur_daddr =
2571 pkt_dev->cur_daddr;
2572 #ifdef CONFIG_XFRM
2573 if (pkt_dev->flags & F_IPSEC)
2574 get_ipsec_sa(pkt_dev, flow);
2575 #endif
2576 pkt_dev->nflows++;
2577 }
2578 }
2579 } else { /* IPV6 * */
2580
2581 if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
2582 int i;
2583
2584 /* Only random destinations yet */
2585
2586 for (i = 0; i < 4; i++) {
2587 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2588 (((__force __be32)get_random_u32() |
2589 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2590 pkt_dev->max_in6_daddr.s6_addr32[i]);
2591 }
2592 }
2593 }
2594
2595 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2596 __u32 t;
2597 if (pkt_dev->flags & F_TXSIZE_RND) {
2598 t = get_random_u32_inclusive(pkt_dev->min_pkt_size,
2599 pkt_dev->max_pkt_size - 1);
2600 } else {
2601 t = pkt_dev->cur_pkt_size + 1;
2602 if (t > pkt_dev->max_pkt_size)
2603 t = pkt_dev->min_pkt_size;
2604 }
2605 pkt_dev->cur_pkt_size = t;
2606 } else if (pkt_dev->n_imix_entries > 0) {
2607 struct imix_pkt *entry;
2608 __u32 t = get_random_u32_below(IMIX_PRECISION);
2609 __u8 entry_index = pkt_dev->imix_distribution[t];
2610
2611 entry = &pkt_dev->imix_entries[entry_index];
2612 entry->count_so_far++;
2613 pkt_dev->cur_pkt_size = entry->size;
2614 }
2615
2616 set_cur_queue_map(pkt_dev);
2617
2618 pkt_dev->flows[flow].count++;
2619 }
2620
2621 static void fill_imix_distribution(struct pktgen_dev *pkt_dev)
2622 {
2623 int cumulative_probabilites[MAX_IMIX_ENTRIES];
2624 int j = 0;
2625 __u64 cumulative_prob = 0;
2626 __u64 total_weight = 0;
2627 int i = 0;
2628
2629 for (i = 0; i < pkt_dev->n_imix_entries; i++)
2630 total_weight += pkt_dev->imix_entries[i].weight;
2631
2632 /* Fill cumulative_probabilites with sum of normalized probabilities */
2633 for (i = 0; i < pkt_dev->n_imix_entries - 1; i++) {
2634 cumulative_prob += div64_u64(pkt_dev->imix_entries[i].weight *
2635 IMIX_PRECISION,
2636 total_weight);
2637 cumulative_probabilites[i] = cumulative_prob;
2638 }
2639 cumulative_probabilites[pkt_dev->n_imix_entries - 1] = 100;
2640
2641 for (i = 0; i < IMIX_PRECISION; i++) {
2642 if (i == cumulative_probabilites[j])
2643 j++;
2644 pkt_dev->imix_distribution[i] = j;
2645 }
2646 }
2647
2648 #ifdef CONFIG_XFRM
2649 static u32 pktgen_dst_metrics[RTAX_MAX + 1] = {
2650
2651 [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */
2652 };
2653
2654 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2655 {
2656 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2657 int err = 0;
2658 struct net *net = dev_net(pkt_dev->odev);
2659
2660 if (!x)
2661 return 0;
2662 /* XXX: we dont support tunnel mode for now until
2663 * we resolve the dst issue */
2664 if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0))
2665 return 0;
2666
2667 /* But when user specify an valid SPI, transformation
2668 * supports both transport/tunnel mode + ESP/AH type.
2669 */
2670 if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0))
2671 skb->_skb_refdst = (unsigned long)&pkt_dev->xdst.u.dst | SKB_DST_NOREF;
2672
2673 rcu_read_lock_bh();
2674 err = pktgen_xfrm_outer_mode_output(x, skb);
2675 rcu_read_unlock_bh();
2676 if (err) {
2677 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR);
2678 goto error;
2679 }
2680 err = x->type->output(x, skb);
2681 if (err) {
2682 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR);
2683 goto error;
2684 }
2685 spin_lock_bh(&x->lock);
2686 x->curlft.bytes += skb->len;
2687 x->curlft.packets++;
2688 spin_unlock_bh(&x->lock);
2689 error:
2690 return err;
2691 }
2692
2693 static void free_SAs(struct pktgen_dev *pkt_dev)
2694 {
2695 if (pkt_dev->cflows) {
2696 /* let go of the SAs if we have them */
2697 int i;
2698 for (i = 0; i < pkt_dev->cflows; i++) {
2699 struct xfrm_state *x = pkt_dev->flows[i].x;
2700 if (x) {
2701 xfrm_state_put(x);
2702 pkt_dev->flows[i].x = NULL;
2703 }
2704 }
2705 }
2706 }
2707
2708 static int process_ipsec(struct pktgen_dev *pkt_dev,
2709 struct sk_buff *skb, __be16 protocol)
2710 {
2711 if (pkt_dev->flags & F_IPSEC) {
2712 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2713 int nhead = 0;
2714 if (x) {
2715 struct ethhdr *eth;
2716 struct iphdr *iph;
2717 int ret;
2718
2719 nhead = x->props.header_len - skb_headroom(skb);
2720 if (nhead > 0) {
2721 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2722 if (ret < 0) {
2723 pr_err("Error expanding ipsec packet %d\n",
2724 ret);
2725 goto err;
2726 }
2727 }
2728
2729 /* ipsec is not expecting ll header */
2730 skb_pull(skb, ETH_HLEN);
2731 ret = pktgen_output_ipsec(skb, pkt_dev);
2732 if (ret) {
2733 pr_err("Error creating ipsec packet %d\n", ret);
2734 goto err;
2735 }
2736 /* restore ll */
2737 eth = skb_push(skb, ETH_HLEN);
2738 memcpy(eth, pkt_dev->hh, 2 * ETH_ALEN);
2739 eth->h_proto = protocol;
2740
2741 /* Update IPv4 header len as well as checksum value */
2742 iph = ip_hdr(skb);
2743 iph->tot_len = htons(skb->len - ETH_HLEN);
2744 ip_send_check(iph);
2745 }
2746 }
2747 return 1;
2748 err:
2749 kfree_skb(skb);
2750 return 0;
2751 }
2752 #endif
2753
2754 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2755 {
2756 unsigned int i;
2757 for (i = 0; i < pkt_dev->nr_labels; i++)
2758 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2759
2760 mpls--;
2761 *mpls |= MPLS_STACK_BOTTOM;
2762 }
2763
2764 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2765 unsigned int prio)
2766 {
2767 return htons(id | (cfi << 12) | (prio << 13));
2768 }
2769
2770 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
2771 int datalen)
2772 {
2773 struct timespec64 timestamp;
2774 struct pktgen_hdr *pgh;
2775
2776 pgh = skb_put(skb, sizeof(*pgh));
2777 datalen -= sizeof(*pgh);
2778
2779 if (pkt_dev->nfrags <= 0) {
2780 skb_put_zero(skb, datalen);
2781 } else {
2782 int frags = pkt_dev->nfrags;
2783 int i, len;
2784 int frag_len;
2785
2786
2787 if (frags > MAX_SKB_FRAGS)
2788 frags = MAX_SKB_FRAGS;
2789 len = datalen - frags * PAGE_SIZE;
2790 if (len > 0) {
2791 skb_put_zero(skb, len);
2792 datalen = frags * PAGE_SIZE;
2793 }
2794
2795 i = 0;
2796 frag_len = (datalen/frags) < PAGE_SIZE ?
2797 (datalen/frags) : PAGE_SIZE;
2798 while (datalen > 0) {
2799 if (unlikely(!pkt_dev->page)) {
2800 int node = numa_node_id();
2801
2802 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
2803 node = pkt_dev->node;
2804 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
2805 if (!pkt_dev->page)
2806 break;
2807 }
2808 get_page(pkt_dev->page);
2809
2810 /*last fragment, fill rest of data*/
2811 if (i == (frags - 1))
2812 skb_frag_fill_page_desc(&skb_shinfo(skb)->frags[i],
2813 pkt_dev->page, 0,
2814 (datalen < PAGE_SIZE ?
2815 datalen : PAGE_SIZE));
2816 else
2817 skb_frag_fill_page_desc(&skb_shinfo(skb)->frags[i],
2818 pkt_dev->page, 0, frag_len);
2819
2820 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
2821 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2822 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
2823 i++;
2824 skb_shinfo(skb)->nr_frags = i;
2825 }
2826 }
2827
2828 /* Stamp the time, and sequence number,
2829 * convert them to network byte order
2830 */
2831 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2832 pgh->seq_num = htonl(pkt_dev->seq_num);
2833
2834 if (pkt_dev->flags & F_NO_TIMESTAMP) {
2835 pgh->tv_sec = 0;
2836 pgh->tv_usec = 0;
2837 } else {
2838 /*
2839 * pgh->tv_sec wraps in y2106 when interpreted as unsigned
2840 * as done by wireshark, or y2038 when interpreted as signed.
2841 * This is probably harmless, but if anyone wants to improve
2842 * it, we could introduce a variant that puts 64-bit nanoseconds
2843 * into the respective header bytes.
2844 * This would also be slightly faster to read.
2845 */
2846 ktime_get_real_ts64(×tamp);
2847 pgh->tv_sec = htonl(timestamp.tv_sec);
2848 pgh->tv_usec = htonl(timestamp.tv_nsec / NSEC_PER_USEC);
2849 }
2850 }
2851
2852 static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
2853 struct pktgen_dev *pkt_dev)
2854 {
2855 unsigned int extralen = LL_RESERVED_SPACE(dev);
2856 struct sk_buff *skb = NULL;
2857 unsigned int size;
2858
2859 size = pkt_dev->cur_pkt_size + 64 + extralen + pkt_dev->pkt_overhead;
2860 if (pkt_dev->flags & F_NODE) {
2861 int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id();
2862
2863 skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node);
2864 if (likely(skb)) {
2865 skb_reserve(skb, NET_SKB_PAD);
2866 skb->dev = dev;
2867 }
2868 } else {
2869 skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
2870 }
2871
2872 /* the caller pre-fetches from skb->data and reserves for the mac hdr */
2873 if (likely(skb))
2874 skb_reserve(skb, extralen - 16);
2875
2876 return skb;
2877 }
2878
2879 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2880 struct pktgen_dev *pkt_dev)
2881 {
2882 struct sk_buff *skb = NULL;
2883 __u8 *eth;
2884 struct udphdr *udph;
2885 int datalen, iplen;
2886 struct iphdr *iph;
2887 __be16 protocol = htons(ETH_P_IP);
2888 __be32 *mpls;
2889 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2890 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2891 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2892 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2893 u16 queue_map;
2894
2895 if (pkt_dev->nr_labels)
2896 protocol = htons(ETH_P_MPLS_UC);
2897
2898 if (pkt_dev->vlan_id != 0xffff)
2899 protocol = htons(ETH_P_8021Q);
2900
2901 /* Update any of the values, used when we're incrementing various
2902 * fields.
2903 */
2904 mod_cur_headers(pkt_dev);
2905 queue_map = pkt_dev->cur_queue_map;
2906
2907 skb = pktgen_alloc_skb(odev, pkt_dev);
2908 if (!skb) {
2909 sprintf(pkt_dev->result, "No memory");
2910 return NULL;
2911 }
2912
2913 prefetchw(skb->data);
2914 skb_reserve(skb, 16);
2915
2916 /* Reserve for ethernet and IP header */
2917 eth = skb_push(skb, 14);
2918 mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32));
2919 if (pkt_dev->nr_labels)
2920 mpls_push(mpls, pkt_dev);
2921
2922 if (pkt_dev->vlan_id != 0xffff) {
2923 if (pkt_dev->svlan_id != 0xffff) {
2924 svlan_tci = skb_put(skb, sizeof(__be16));
2925 *svlan_tci = build_tci(pkt_dev->svlan_id,
2926 pkt_dev->svlan_cfi,
2927 pkt_dev->svlan_p);
2928 svlan_encapsulated_proto = skb_put(skb,
2929 sizeof(__be16));
2930 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2931 }
2932 vlan_tci = skb_put(skb, sizeof(__be16));
2933 *vlan_tci = build_tci(pkt_dev->vlan_id,
2934 pkt_dev->vlan_cfi,
2935 pkt_dev->vlan_p);
2936 vlan_encapsulated_proto = skb_put(skb, sizeof(__be16));
2937 *vlan_encapsulated_proto = htons(ETH_P_IP);
2938 }
2939
2940 skb_reset_mac_header(skb);
2941 skb_set_network_header(skb, skb->len);
2942 iph = skb_put(skb, sizeof(struct iphdr));
2943
2944 skb_set_transport_header(skb, skb->len);
2945 udph = skb_put(skb, sizeof(struct udphdr));
2946 skb_set_queue_mapping(skb, queue_map);
2947 skb->priority = pkt_dev->skb_priority;
2948
2949 memcpy(eth, pkt_dev->hh, 12);
2950 *(__be16 *) & eth[12] = protocol;
2951
2952 /* Eth + IPh + UDPh + mpls */
2953 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2954 pkt_dev->pkt_overhead;
2955 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
2956 datalen = sizeof(struct pktgen_hdr);
2957
2958 udph->source = htons(pkt_dev->cur_udp_src);
2959 udph->dest = htons(pkt_dev->cur_udp_dst);
2960 udph->len = htons(datalen + 8); /* DATA + udphdr */
2961 udph->check = 0;
2962
2963 iph->ihl = 5;
2964 iph->version = 4;
2965 iph->ttl = 32;
2966 iph->tos = pkt_dev->tos;
2967 iph->protocol = IPPROTO_UDP; /* UDP */
2968 iph->saddr = pkt_dev->cur_saddr;
2969 iph->daddr = pkt_dev->cur_daddr;
2970 iph->id = htons(pkt_dev->ip_id);
2971 pkt_dev->ip_id++;
2972 iph->frag_off = 0;
2973 iplen = 20 + 8 + datalen;
2974 iph->tot_len = htons(iplen);
2975 ip_send_check(iph);
2976 skb->protocol = protocol;
2977 skb->dev = odev;
2978 skb->pkt_type = PACKET_HOST;
2979
2980 pktgen_finalize_skb(pkt_dev, skb, datalen);
2981
2982 if (!(pkt_dev->flags & F_UDPCSUM)) {
2983 skb->ip_summed = CHECKSUM_NONE;
2984 } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IP_CSUM)) {
2985 skb->ip_summed = CHECKSUM_PARTIAL;
2986 skb->csum = 0;
2987 udp4_hwcsum(skb, iph->saddr, iph->daddr);
2988 } else {
2989 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), datalen + 8, 0);
2990
2991 /* add protocol-dependent pseudo-header */
2992 udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
2993 datalen + 8, IPPROTO_UDP, csum);
2994
2995 if (udph->check == 0)
2996 udph->check = CSUM_MANGLED_0;
2997 }
2998
2999 #ifdef CONFIG_XFRM
3000 if (!process_ipsec(pkt_dev, skb, protocol))
3001 return NULL;
3002 #endif
3003
3004 return skb;
3005 }
3006
3007 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
3008 struct pktgen_dev *pkt_dev)
3009 {
3010 struct sk_buff *skb = NULL;
3011 __u8 *eth;
3012 struct udphdr *udph;
3013 int datalen, udplen;
3014 struct ipv6hdr *iph;
3015 __be16 protocol = htons(ETH_P_IPV6);
3016 __be32 *mpls;
3017 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
3018 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
3019 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
3020 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
3021 u16 queue_map;
3022
3023 if (pkt_dev->nr_labels)
3024 protocol = htons(ETH_P_MPLS_UC);
3025
3026 if (pkt_dev->vlan_id != 0xffff)
3027 protocol = htons(ETH_P_8021Q);
3028
3029 /* Update any of the values, used when we're incrementing various
3030 * fields.
3031 */
3032 mod_cur_headers(pkt_dev);
3033 queue_map = pkt_dev->cur_queue_map;
3034
3035 skb = pktgen_alloc_skb(odev, pkt_dev);
3036 if (!skb) {
3037 sprintf(pkt_dev->result, "No memory");
3038 return NULL;
3039 }
3040
3041 prefetchw(skb->data);
3042 skb_reserve(skb, 16);
3043
3044 /* Reserve for ethernet and IP header */
3045 eth = skb_push(skb, 14);
3046 mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32));
3047 if (pkt_dev->nr_labels)
3048 mpls_push(mpls, pkt_dev);
3049
3050 if (pkt_dev->vlan_id != 0xffff) {
3051 if (pkt_dev->svlan_id != 0xffff) {
3052 svlan_tci = skb_put(skb, sizeof(__be16));
3053 *svlan_tci = build_tci(pkt_dev->svlan_id,
3054 pkt_dev->svlan_cfi,
3055 pkt_dev->svlan_p);
3056 svlan_encapsulated_proto = skb_put(skb,
3057 sizeof(__be16));
3058 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
3059 }
3060 vlan_tci = skb_put(skb, sizeof(__be16));
3061 *vlan_tci = build_tci(pkt_dev->vlan_id,
3062 pkt_dev->vlan_cfi,
3063 pkt_dev->vlan_p);
3064 vlan_encapsulated_proto = skb_put(skb, sizeof(__be16));
3065 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
3066 }
3067
3068 skb_reset_mac_header(skb);
3069 skb_set_network_header(skb, skb->len);
3070 iph = skb_put(skb, sizeof(struct ipv6hdr));
3071
3072 skb_set_transport_header(skb, skb->len);
3073 udph = skb_put(skb, sizeof(struct udphdr));
3074 skb_set_queue_mapping(skb, queue_map);
3075 skb->priority = pkt_dev->skb_priority;
3076
3077 memcpy(eth, pkt_dev->hh, 12);
3078 *(__be16 *) ð[12] = protocol;
3079
3080 /* Eth + IPh + UDPh + mpls */
3081 datalen = pkt_dev->cur_pkt_size - 14 -
3082 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
3083 pkt_dev->pkt_overhead;
3084
3085 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
3086 datalen = sizeof(struct pktgen_hdr);
3087 net_info_ratelimited("increased datalen to %d\n", datalen);
3088 }
3089
3090 udplen = datalen + sizeof(struct udphdr);
3091 udph->source = htons(pkt_dev->cur_udp_src);
3092 udph->dest = htons(pkt_dev->cur_udp_dst);
3093 udph->len = htons(udplen);
3094 udph->check = 0;
3095
3096 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
3097
3098 if (pkt_dev->traffic_class) {
3099 /* Version + traffic class + flow (0) */
3100 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
3101 }
3102
3103 iph->hop_limit = 32;
3104
3105 iph->payload_len = htons(udplen);
3106 iph->nexthdr = IPPROTO_UDP;
3107
3108 iph->daddr = pkt_dev->cur_in6_daddr;
3109 iph->saddr = pkt_dev->cur_in6_saddr;
3110
3111 skb->protocol = protocol;
3112 skb->dev = odev;
3113 skb->pkt_type = PACKET_HOST;
3114
3115 pktgen_finalize_skb(pkt_dev, skb, datalen);
3116
3117 if (!(pkt_dev->flags & F_UDPCSUM)) {
3118 skb->ip_summed = CHECKSUM_NONE;
3119 } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IPV6_CSUM)) {
3120 skb->ip_summed = CHECKSUM_PARTIAL;
3121 skb->csum_start = skb_transport_header(skb) - skb->head;
3122 skb->csum_offset = offsetof(struct udphdr, check);
3123 udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0);
3124 } else {
3125 __wsum csum = skb_checksum(skb, skb_transport_offset(skb), udplen, 0);
3126
3127 /* add protocol-dependent pseudo-header */
3128 udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum);
3129
3130 if (udph->check == 0)
3131 udph->check = CSUM_MANGLED_0;
3132 }
3133
3134 return skb;
3135 }
3136
3137 static struct sk_buff *fill_packet(struct net_device *odev,
3138 struct pktgen_dev *pkt_dev)
3139 {
3140 if (pkt_dev->flags & F_IPV6)
3141 return fill_packet_ipv6(odev, pkt_dev);
3142 else
3143 return fill_packet_ipv4(odev, pkt_dev);
3144 }
3145
3146 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3147 {
3148 pkt_dev->seq_num = 1;
3149 pkt_dev->idle_acc = 0;
3150 pkt_dev->sofar = 0;
3151 pkt_dev->tx_bytes = 0;
3152 pkt_dev->errors = 0;
3153 }
3154
3155 /* Set up structure for sending pkts, clear counters */
3156
3157 static void pktgen_run(struct pktgen_thread *t)
3158 {
3159 struct pktgen_dev *pkt_dev;
3160 int started = 0;
3161
3162 func_enter();
3163
3164 rcu_read_lock();
3165 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3166
3167 /*
3168 * setup odev and create initial packet.
3169 */
3170 pktgen_setup_inject(pkt_dev);
3171
3172 if (pkt_dev->odev) {
3173 pktgen_clear_counters(pkt_dev);
3174 pkt_dev->skb = NULL;
3175 pkt_dev->started_at = pkt_dev->next_tx = ktime_get();
3176
3177 set_pkt_overhead(pkt_dev);
3178
3179 strcpy(pkt_dev->result, "Starting");
3180 pkt_dev->running = 1; /* Cranke yeself! */
3181 started++;
3182 } else
3183 strcpy(pkt_dev->result, "Error starting");
3184 }
3185 rcu_read_unlock();
3186 if (started)
3187 t->control &= ~(T_STOP);
3188 }
3189
3190 static void pktgen_handle_all_threads(struct pktgen_net *pn, u32 flags)
3191 {
3192 struct pktgen_thread *t;
3193
3194 mutex_lock(&pktgen_thread_lock);
3195
3196 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3197 t->control |= (flags);
3198
3199 mutex_unlock(&pktgen_thread_lock);
3200 }
3201
3202 static void pktgen_stop_all_threads(struct pktgen_net *pn)
3203 {
3204 func_enter();
3205
3206 pktgen_handle_all_threads(pn, T_STOP);
3207 }
3208
3209 static int thread_is_running(const struct pktgen_thread *t)
3210 {
3211 const struct pktgen_dev *pkt_dev;
3212
3213 rcu_read_lock();
3214 list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
3215 if (pkt_dev->running) {
3216 rcu_read_unlock();
3217 return 1;
3218 }
3219 rcu_read_unlock();
3220 return 0;
3221 }
3222
3223 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3224 {
3225 while (thread_is_running(t)) {
3226
3227 /* note: 't' will still be around even after the unlock/lock
3228 * cycle because pktgen_thread threads are only cleared at
3229 * net exit
3230 */
3231 mutex_unlock(&pktgen_thread_lock);
3232 msleep_interruptible(100);
3233 mutex_lock(&pktgen_thread_lock);
3234
3235 if (signal_pending(current))
3236 goto signal;
3237 }
3238 return 1;
3239 signal:
3240 return 0;
3241 }
3242
3243 static int pktgen_wait_all_threads_run(struct pktgen_net *pn)
3244 {
3245 struct pktgen_thread *t;
3246 int sig = 1;
3247
3248 /* prevent from racing with rmmod */
3249 if (!try_module_get(THIS_MODULE))
3250 return sig;
3251
3252 mutex_lock(&pktgen_thread_lock);
3253
3254 list_for_each_entry(t, &pn->pktgen_threads, th_list) {
3255 sig = pktgen_wait_thread_run(t);
3256 if (sig == 0)
3257 break;
3258 }
3259
3260 if (sig == 0)
3261 list_for_each_entry(t, &pn->pktgen_threads, th_list)
3262 t->control |= (T_STOP);
3263
3264 mutex_unlock(&pktgen_thread_lock);
3265 module_put(THIS_MODULE);
3266 return sig;
3267 }
3268
3269 static void pktgen_run_all_threads(struct pktgen_net *pn)
3270 {
3271 func_enter();
3272
3273 pktgen_handle_all_threads(pn, T_RUN);
3274
3275 /* Propagate thread->control */
3276 schedule_timeout_interruptible(msecs_to_jiffies(125));
3277
3278 pktgen_wait_all_threads_run(pn);
3279 }
3280
3281 static void pktgen_reset_all_threads(struct pktgen_net *pn)
3282 {
3283 func_enter();
3284
3285 pktgen_handle_all_threads(pn, T_REMDEVALL);
3286
3287 /* Propagate thread->control */
3288 schedule_timeout_interruptible(msecs_to_jiffies(125));
3289
3290 pktgen_wait_all_threads_run(pn);
3291 }
3292
3293 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3294 {
3295 __u64 bps, mbps, pps;
3296 char *p = pkt_dev->result;
3297 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3298 pkt_dev->started_at);
3299 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3300
3301 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
3302 (unsigned long long)ktime_to_us(elapsed),
3303 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3304 (unsigned long long)ktime_to_us(idle),
3305 (unsigned long long)pkt_dev->sofar,
3306 pkt_dev->cur_pkt_size, nr_frags);
3307
3308 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3309 ktime_to_ns(elapsed));
3310
3311 if (pkt_dev->n_imix_entries > 0) {
3312 int i;
3313 struct imix_pkt *entry;
3314
3315 bps = 0;
3316 for (i = 0; i < pkt_dev->n_imix_entries; i++) {
3317 entry = &pkt_dev->imix_entries[i];
3318 bps += entry->size * entry->count_so_far;
3319 }
3320 bps = div64_u64(bps * 8 * NSEC_PER_SEC, ktime_to_ns(elapsed));
3321 } else {
3322 bps = pps * 8 * pkt_dev->cur_pkt_size;
3323 }
3324
3325 mbps = bps;
3326 do_div(mbps, 1000000);
3327 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3328 (unsigned long long)pps,
3329 (unsigned long long)mbps,
3330 (unsigned long long)bps,
3331 (unsigned long long)pkt_dev->errors);
3332 }
3333
3334 /* Set stopped-at timer, remove from running list, do counters & statistics */
3335 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3336 {
3337 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3338
3339 if (!pkt_dev->running) {
3340 pr_warn("interface: %s is already stopped\n",
3341 pkt_dev->odevname);
3342 return -EINVAL;
3343 }
3344
3345 pkt_dev->running = 0;
3346 kfree_skb(pkt_dev->skb);
3347 pkt_dev->skb = NULL;
3348 pkt_dev->stopped_at = ktime_get();
3349
3350 show_results(pkt_dev, nr_frags);
3351
3352 return 0;
3353 }
3354
3355 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3356 {
3357 struct pktgen_dev *pkt_dev, *best = NULL;
3358
3359 rcu_read_lock();
3360 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3361 if (!pkt_dev->running)
3362 continue;
3363 if (best == NULL)
3364 best = pkt_dev;
3365 else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0)
3366 best = pkt_dev;
3367 }
3368 rcu_read_unlock();
3369
3370 return best;
3371 }
3372
3373 static void pktgen_stop(struct pktgen_thread *t)
3374 {
3375 struct pktgen_dev *pkt_dev;
3376
3377 func_enter();
3378
3379 rcu_read_lock();
3380
3381 list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
3382 pktgen_stop_device(pkt_dev);
3383 }
3384
3385 rcu_read_unlock();
3386 }
3387
3388 /*
3389 * one of our devices needs to be removed - find it
3390 * and remove it
3391 */
3392 static void pktgen_rem_one_if(struct pktgen_thread *t)
3393 {
3394 struct list_head *q, *n;
3395 struct pktgen_dev *cur;
3396
3397 func_enter();
3398
3399 list_for_each_safe(q, n, &t->if_list) {
3400 cur = list_entry(q, struct pktgen_dev, list);
3401
3402 if (!cur->removal_mark)
3403 continue;
3404
3405 kfree_skb(cur->skb);
3406 cur->skb = NULL;
3407
3408 pktgen_remove_device(t, cur);
3409
3410 break;
3411 }
3412 }
3413
3414 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3415 {
3416 struct list_head *q, *n;
3417 struct pktgen_dev *cur;
3418
3419 func_enter();
3420
3421 /* Remove all devices, free mem */
3422
3423 list_for_each_safe(q, n, &t->if_list) {
3424 cur = list_entry(q, struct pktgen_dev, list);
3425
3426 kfree_skb(cur->skb);
3427 cur->skb = NULL;
3428
3429 pktgen_remove_device(t, cur);
3430 }
3431 }
3432
3433 static void pktgen_rem_thread(struct pktgen_thread *t)
3434 {
3435 /* Remove from the thread list */
3436 remove_proc_entry(t->tsk->comm, t->net->proc_dir);
3437 }
3438
3439 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3440 {
3441 ktime_t idle_start = ktime_get();
3442 schedule();
3443 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3444 }
3445
3446 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3447 {
3448 ktime_t idle_start = ktime_get();
3449
3450 while (refcount_read(&(pkt_dev->skb->users)) != 1) {
3451 if (signal_pending(current))
3452 break;
3453
3454 if (need_resched())
3455 pktgen_resched(pkt_dev);
3456 else
3457 cpu_relax();
3458 }
3459 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
3460 }
3461
3462 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3463 {
3464 bool skb_shared = !!(READ_ONCE(pkt_dev->flags) & F_SHARED);
3465 struct net_device *odev = pkt_dev->odev;
3466 struct netdev_queue *txq;
3467 unsigned int burst = 1;
3468 struct sk_buff *skb;
3469 int clone_skb = 0;
3470 int ret;
3471
3472 /* If 'skb_shared' is false, the read of possible
3473 * new values (if any) for 'burst' and 'clone_skb' will be skipped to
3474 * prevent some concurrent changes from slipping in. And the stabilized
3475 * config will be read in during the next run of pktgen_xmit.
3476 */
3477 if (skb_shared) {
3478 burst = READ_ONCE(pkt_dev->burst);
3479 clone_skb = READ_ONCE(pkt_dev->clone_skb);
3480 }
3481
3482 /* If device is offline, then don't send */
3483 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3484 pktgen_stop_device(pkt_dev);
3485 return;
3486 }
3487
3488 /* This is max DELAY, this has special meaning of
3489 * "never transmit"
3490 */
3491 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3492 pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
3493 return;
3494 }
3495
3496 /* If no skb or clone count exhausted then get new one */
3497 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3498 ++pkt_dev->clone_count >= clone_skb)) {
3499 /* build a new pkt */
3500 kfree_skb(pkt_dev->skb);
3501
3502 pkt_dev->skb = fill_packet(odev, pkt_dev);
3503 if (pkt_dev->skb == NULL) {
3504 pr_err("ERROR: couldn't allocate skb in fill_packet\n");
3505 schedule();
3506 pkt_dev->clone_count--; /* back out increment, OOM */
3507 return;
3508 }
3509 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3510 pkt_dev->clone_count = 0; /* reset counter */
3511 }
3512
3513 if (pkt_dev->delay && pkt_dev->last_ok)
3514 spin(pkt_dev, pkt_dev->next_tx);
3515
3516 if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) {
3517 skb = pkt_dev->skb;
3518 skb->protocol = eth_type_trans(skb, skb->dev);
3519 if (skb_shared)
3520 refcount_add(burst, &skb->users);
3521 local_bh_disable();
3522 do {
3523 ret = netif_receive_skb(skb);
3524 if (ret == NET_RX_DROP)
3525 pkt_dev->errors++;
3526 pkt_dev->sofar++;
3527 pkt_dev->seq_num++;
3528 if (unlikely(!skb_shared)) {
3529 pkt_dev->skb = NULL;
3530 break;
3531 }
3532 if (refcount_read(&skb->users) != burst) {
3533 /* skb was queued by rps/rfs or taps,
3534 * so cannot reuse this skb
3535 */
3536 WARN_ON(refcount_sub_and_test(burst - 1, &skb->users));
3537 /* get out of the loop and wait
3538 * until skb is consumed
3539 */
3540 break;
3541 }
3542 /* skb was 'freed' by stack, so clean few
3543 * bits and reuse it
3544 */
3545 skb_reset_redirect(skb);
3546 } while (--burst > 0);
3547 goto out; /* Skips xmit_mode M_START_XMIT */
3548 } else if (pkt_dev->xmit_mode == M_QUEUE_XMIT) {
3549 local_bh_disable();
3550 if (skb_shared)
3551 refcount_inc(&pkt_dev->skb->users);
3552
3553 ret = dev_queue_xmit(pkt_dev->skb);
3554
3555 if (!skb_shared && dev_xmit_complete(ret))
3556 pkt_dev->skb = NULL;
3557
3558 switch (ret) {
3559 case NET_XMIT_SUCCESS:
3560 pkt_dev->sofar++;
3561 pkt_dev->seq_num++;
3562 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3563 break;
3564 case NET_XMIT_DROP:
3565 case NET_XMIT_CN:
3566 /* These are all valid return codes for a qdisc but
3567 * indicate packets are being dropped or will likely
3568 * be dropped soon.
3569 */
3570 case NETDEV_TX_BUSY:
3571 /* qdisc may call dev_hard_start_xmit directly in cases
3572 * where no queues exist e.g. loopback device, virtual
3573 * devices, etc. In this case we need to handle
3574 * NETDEV_TX_ codes.
3575 */
3576 default:
3577 pkt_dev->errors++;
3578 net_info_ratelimited("%s xmit error: %d\n",
3579 pkt_dev->odevname, ret);
3580 break;
3581 }
3582 goto out;
3583 }
3584
3585 txq = skb_get_tx_queue(odev, pkt_dev->skb);
3586
3587 local_bh_disable();
3588
3589 HARD_TX_LOCK(odev, txq, smp_processor_id());
3590
3591 if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) {
3592 pkt_dev->last_ok = 0;
3593 goto unlock;
3594 }
3595 if (skb_shared)
3596 refcount_add(burst, &pkt_dev->skb->users);
3597
3598 xmit_more:
3599 ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0);
3600
3601 if (!skb_shared && dev_xmit_complete(ret))
3602 pkt_dev->skb = NULL;
3603
3604 switch (ret) {
3605 case NETDEV_TX_OK:
3606 pkt_dev->last_ok = 1;
3607 pkt_dev->sofar++;
3608 pkt_dev->seq_num++;
3609 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3610 if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq))
3611 goto xmit_more;
3612 break;
3613 case NET_XMIT_DROP:
3614 case NET_XMIT_CN:
3615 /* skb has been consumed */
3616 pkt_dev->errors++;
3617 break;
3618 default: /* Drivers are not supposed to return other values! */
3619 net_info_ratelimited("%s xmit error: %d\n",
3620 pkt_dev->odevname, ret);
3621 pkt_dev->errors++;
3622 fallthrough;
3623 case NETDEV_TX_BUSY:
3624 /* Retry it next time */
3625 if (skb_shared)
3626 refcount_dec(&pkt_dev->skb->users);
3627 pkt_dev->last_ok = 0;
3628 }
3629 if (unlikely(burst))
3630 WARN_ON(refcount_sub_and_test(burst, &pkt_dev->skb->users));
3631 unlock:
3632 HARD_TX_UNLOCK(odev, txq);
3633
3634 out:
3635 local_bh_enable();
3636
3637 /* If pkt_dev->count is zero, then run forever */
3638 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3639 if (pkt_dev->skb)
3640 pktgen_wait_for_skb(pkt_dev);
3641
3642 /* Done with this */
3643 pktgen_stop_device(pkt_dev);
3644 }
3645 }
3646
3647 /*
3648 * Main loop of the thread goes here
3649 */
3650
3651 static int pktgen_thread_worker(void *arg)
3652 {
3653 struct pktgen_thread *t = arg;
3654 struct pktgen_dev *pkt_dev = NULL;
3655 int cpu = t->cpu;
3656
3657 WARN_ON_ONCE(smp_processor_id() != cpu);
3658
3659 init_waitqueue_head(&t->queue);
3660 complete(&t->start_done);
3661
3662 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
3663
3664 set_freezable();
3665
3666 while (!kthread_should_stop()) {
3667 pkt_dev = next_to_run(t);
3668
3669 if (unlikely(!pkt_dev && t->control == 0)) {
3670 if (t->net->pktgen_exiting)
3671 break;
3672 wait_event_freezable_timeout(t->queue,
3673 t->control != 0, HZ / 10);
3674 continue;
3675 }
3676
3677 if (likely(pkt_dev)) {
3678 pktgen_xmit(pkt_dev);
3679
3680 if (need_resched())
3681 pktgen_resched(pkt_dev);
3682 else
3683 cpu_relax();
3684 }
3685
3686 if (t->control & T_STOP) {
3687 pktgen_stop(t);
3688 t->control &= ~(T_STOP);
3689 }
3690
3691 if (t->control & T_RUN) {
3692 pktgen_run(t);
3693 t->control &= ~(T_RUN);
3694 }
3695
3696 if (t->control & T_REMDEVALL) {
3697 pktgen_rem_all_ifs(t);
3698 t->control &= ~(T_REMDEVALL);
3699 }
3700
3701 if (t->control & T_REMDEV) {
3702 pktgen_rem_one_if(t);
3703 t->control &= ~(T_REMDEV);
3704 }
3705
3706 try_to_freeze();
3707 }
3708
3709 pr_debug("%s stopping all device\n", t->tsk->comm);
3710 pktgen_stop(t);
3711
3712 pr_debug("%s removing all device\n", t->tsk->comm);
3713 pktgen_rem_all_ifs(t);
3714
3715 pr_debug("%s removing thread\n", t->tsk->comm);
3716 pktgen_rem_thread(t);
3717
3718 return 0;
3719 }
3720
3721 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3722 const char *ifname, bool exact)
3723 {
3724 struct pktgen_dev *p, *pkt_dev = NULL;
3725 size_t len = strlen(ifname);
3726
3727 rcu_read_lock();
3728 list_for_each_entry_rcu(p, &t->if_list, list)
3729 if (strncmp(p->odevname, ifname, len) == 0) {
3730 if (p->odevname[len]) {
3731 if (exact || p->odevname[len] != '@')
3732 continue;
3733 }
3734 pkt_dev = p;
3735 break;
3736 }
3737
3738 rcu_read_unlock();
3739 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
3740 return pkt_dev;
3741 }
3742
3743 /*
3744 * Adds a dev at front of if_list.
3745 */
3746
3747 static int add_dev_to_thread(struct pktgen_thread *t,
3748 struct pktgen_dev *pkt_dev)
3749 {
3750 int rv = 0;
3751
3752 /* This function cannot be called concurrently, as its called
3753 * under pktgen_thread_lock mutex, but it can run from
3754 * userspace on another CPU than the kthread. The if_lock()
3755 * is used here to sync with concurrent instances of
3756 * _rem_dev_from_if_list() invoked via kthread, which is also
3757 * updating the if_list */
3758 if_lock(t);
3759
3760 if (pkt_dev->pg_thread) {
3761 pr_err("ERROR: already assigned to a thread\n");
3762 rv = -EBUSY;
3763 goto out;
3764 }
3765
3766 pkt_dev->running = 0;
3767 pkt_dev->pg_thread = t;
3768 list_add_rcu(&pkt_dev->list, &t->if_list);
3769
3770 out:
3771 if_unlock(t);
3772 return rv;
3773 }
3774
3775 /* Called under thread lock */
3776
3777 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3778 {
3779 struct pktgen_dev *pkt_dev;
3780 int err;
3781 int node = cpu_to_node(t->cpu);
3782
3783 /* We don't allow a device to be on several threads */
3784
3785 pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND);
3786 if (pkt_dev) {
3787 pr_err("ERROR: interface already used\n");
3788 return -EBUSY;
3789 }
3790
3791 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3792 if (!pkt_dev)
3793 return -ENOMEM;
3794
3795 strcpy(pkt_dev->odevname, ifname);
3796 pkt_dev->flows = vzalloc_node(array_size(MAX_CFLOWS,
3797 sizeof(struct flow_state)),
3798 node);
3799 if (pkt_dev->flows == NULL) {
3800 kfree(pkt_dev);
3801 return -ENOMEM;
3802 }
3803
3804 pkt_dev->removal_mark = 0;
3805 pkt_dev->nfrags = 0;
3806 pkt_dev->delay = pg_delay_d;
3807 pkt_dev->count = pg_count_d;
3808 pkt_dev->sofar = 0;
3809 pkt_dev->udp_src_min = 9; /* sink port */
3810 pkt_dev->udp_src_max = 9;
3811 pkt_dev->udp_dst_min = 9;
3812 pkt_dev->udp_dst_max = 9;
3813 pkt_dev->vlan_p = 0;
3814 pkt_dev->vlan_cfi = 0;
3815 pkt_dev->vlan_id = 0xffff;
3816 pkt_dev->svlan_p = 0;
3817 pkt_dev->svlan_cfi = 0;
3818 pkt_dev->svlan_id = 0xffff;
3819 pkt_dev->burst = 1;
3820 pkt_dev->node = NUMA_NO_NODE;
3821 pkt_dev->flags = F_SHARED; /* SKB shared by default */
3822
3823 err = pktgen_setup_dev(t->net, pkt_dev, ifname);
3824 if (err)
3825 goto out1;
3826 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
3827 pkt_dev->clone_skb = pg_clone_skb_d;
3828
3829 pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir,
3830 &pktgen_if_proc_ops, pkt_dev);
3831 if (!pkt_dev->entry) {
3832 pr_err("cannot create %s/%s procfs entry\n",
3833 PG_PROC_DIR, ifname);
3834 err = -EINVAL;
3835 goto out2;
3836 }
3837 #ifdef CONFIG_XFRM
3838 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3839 pkt_dev->ipsproto = IPPROTO_ESP;
3840
3841 /* xfrm tunnel mode needs additional dst to extract outter
3842 * ip header protocol/ttl/id field, here creat a phony one.
3843 * instead of looking for a valid rt, which definitely hurting
3844 * performance under such circumstance.
3845 */
3846 pkt_dev->dstops.family = AF_INET;
3847 pkt_dev->xdst.u.dst.dev = pkt_dev->odev;
3848 dst_init_metrics(&pkt_dev->xdst.u.dst, pktgen_dst_metrics, false);
3849 pkt_dev->xdst.child = &pkt_dev->xdst.u.dst;
3850 pkt_dev->xdst.u.dst.ops = &pkt_dev->dstops;
3851 #endif
3852
3853 return add_dev_to_thread(t, pkt_dev);
3854 out2:
3855 netdev_put(pkt_dev->odev, &pkt_dev->dev_tracker);
3856 out1:
3857 #ifdef CONFIG_XFRM
3858 free_SAs(pkt_dev);
3859 #endif
3860 vfree(pkt_dev->flows);
3861 kfree(pkt_dev);
3862 return err;
3863 }
3864
3865 static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
3866 {
3867 struct pktgen_thread *t;
3868 struct proc_dir_entry *pe;
3869 struct task_struct *p;
3870
3871 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3872 cpu_to_node(cpu));
3873 if (!t) {
3874 pr_err("ERROR: out of memory, can't create new thread\n");
3875 return -ENOMEM;
3876 }
3877
3878 mutex_init(&t->if_lock);
3879 t->cpu = cpu;
3880
3881 INIT_LIST_HEAD(&t->if_list);
3882
3883 list_add_tail(&t->th_list, &pn->pktgen_threads);
3884 init_completion(&t->start_done);
3885
3886 p = kthread_create_on_node(pktgen_thread_worker,
3887 t,
3888 cpu_to_node(cpu),
3889 "kpktgend_%d", cpu);
3890 if (IS_ERR(p)) {
3891 pr_err("kthread_create_on_node() failed for cpu %d\n", t->cpu);
3892 list_del(&t->th_list);
3893 kfree(t);
3894 return PTR_ERR(p);
3895 }
3896 kthread_bind(p, cpu);
3897 t->tsk = p;
3898
3899 pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
3900 &pktgen_thread_proc_ops, t);
3901 if (!pe) {
3902 pr_err("cannot create %s/%s procfs entry\n",
3903 PG_PROC_DIR, t->tsk->comm);
3904 kthread_stop(p);
3905 list_del(&t->th_list);
3906 kfree(t);
3907 return -EINVAL;
3908 }
3909
3910 t->net = pn;
3911 get_task_struct(p);
3912 wake_up_process(p);
3913 wait_for_completion(&t->start_done);
3914
3915 return 0;
3916 }
3917
3918 /*
3919 * Removes a device from the thread if_list.
3920 */
3921 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3922 struct pktgen_dev *pkt_dev)
3923 {
3924 struct list_head *q, *n;
3925 struct pktgen_dev *p;
3926
3927 if_lock(t);
3928 list_for_each_safe(q, n, &t->if_list) {
3929 p = list_entry(q, struct pktgen_dev, list);
3930 if (p == pkt_dev)
3931 list_del_rcu(&p->list);
3932 }
3933 if_unlock(t);
3934 }
3935
3936 static int pktgen_remove_device(struct pktgen_thread *t,
3937 struct pktgen_dev *pkt_dev)
3938 {
3939 pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
3940
3941 if (pkt_dev->running) {
3942 pr_warn("WARNING: trying to remove a running interface, stopping it now\n");
3943 pktgen_stop_device(pkt_dev);
3944 }
3945
3946 /* Dis-associate from the interface */
3947
3948 if (pkt_dev->odev) {
3949 netdev_put(pkt_dev->odev, &pkt_dev->dev_tracker);
3950 pkt_dev->odev = NULL;
3951 }
3952
3953 /* Remove proc before if_list entry, because add_device uses
3954 * list to determine if interface already exist, avoid race
3955 * with proc_create_data() */
3956 proc_remove(pkt_dev->entry);
3957
3958 /* And update the thread if_list */
3959 _rem_dev_from_if_list(t, pkt_dev);
3960
3961 #ifdef CONFIG_XFRM
3962 free_SAs(pkt_dev);
3963 #endif
3964 vfree(pkt_dev->flows);
3965 if (pkt_dev->page)
3966 put_page(pkt_dev->page);
3967 kfree_rcu(pkt_dev, rcu);
3968 return 0;
3969 }
3970
3971 static int __net_init pg_net_init(struct net *net)
3972 {
3973 struct pktgen_net *pn = net_generic(net, pg_net_id);
3974 struct proc_dir_entry *pe;
3975 int cpu, ret = 0;
3976
3977 pn->net = net;
3978 INIT_LIST_HEAD(&pn->pktgen_threads);
3979 pn->pktgen_exiting = false;
3980 pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net);
3981 if (!pn->proc_dir) {
3982 pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR);
3983 return -ENODEV;
3984 }
3985 pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_proc_ops);
3986 if (pe == NULL) {
3987 pr_err("cannot create %s procfs entry\n", PGCTRL);
3988 ret = -EINVAL;
3989 goto remove;
3990 }
3991
3992 cpus_read_lock();
3993 for_each_online_cpu(cpu) {
3994 int err;
3995
3996 err = pktgen_create_thread(cpu, pn);
3997 if (err)
3998 pr_warn("Cannot create thread for cpu %d (%d)\n",
3999 cpu, err);
4000 }
4001 cpus_read_unlock();
4002
4003 if (list_empty(&pn->pktgen_threads)) {
4004 pr_err("Initialization failed for all threads\n");
4005 ret = -ENODEV;
4006 goto remove_entry;
4007 }
4008
4009 return 0;
4010
4011 remove_entry:
4012 remove_proc_entry(PGCTRL, pn->proc_dir);
4013 remove:
4014 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
4015 return ret;
4016 }
4017
4018 static void __net_exit pg_net_exit(struct net *net)
4019 {
4020 struct pktgen_net *pn = net_generic(net, pg_net_id);
4021 struct pktgen_thread *t;
4022 struct list_head *q, *n;
4023 LIST_HEAD(list);
4024
4025 /* Stop all interfaces & threads */
4026 pn->pktgen_exiting = true;
4027
4028 mutex_lock(&pktgen_thread_lock);
4029 list_splice_init(&pn->pktgen_threads, &list);
4030 mutex_unlock(&pktgen_thread_lock);
4031
4032 list_for_each_safe(q, n, &list) {
4033 t = list_entry(q, struct pktgen_thread, th_list);
4034 list_del(&t->th_list);
4035 kthread_stop_put(t->tsk);
4036 kfree(t);
4037 }
4038
4039 remove_proc_entry(PGCTRL, pn->proc_dir);
4040 remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
4041 }
4042
4043 static struct pernet_operations pg_net_ops = {
4044 .init = pg_net_init,
4045 .exit = pg_net_exit,
4046 .id = &pg_net_id,
4047 .size = sizeof(struct pktgen_net),
4048 };
4049
4050 static int __init pg_init(void)
4051 {
4052 int ret = 0;
4053
4054 pr_info("%s", version);
4055 ret = register_pernet_subsys(&pg_net_ops);
4056 if (ret)
4057 return ret;
4058 ret = register_netdevice_notifier(&pktgen_notifier_block);
4059 if (ret)
4060 unregister_pernet_subsys(&pg_net_ops);
4061
4062 return ret;
4063 }
4064
4065 static void __exit pg_cleanup(void)
4066 {
4067 unregister_netdevice_notifier(&pktgen_notifier_block);
4068 unregister_pernet_subsys(&pg_net_ops);
4069 /* Don't need rcu_barrier() due to use of kfree_rcu() */
4070 }
4071
4072 module_init(pg_init);
4073 module_exit(pg_cleanup);
4074
4075 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
4076 MODULE_DESCRIPTION("Packet Generator tool");
4077 MODULE_LICENSE("GPL");
4078 MODULE_VERSION(VERSION);
4079 module_param(pg_count_d, int, 0);
4080 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
4081 module_param(pg_delay_d, int, 0);
4082 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
4083 module_param(pg_clone_skb_d, int, 0);
4084 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
4085 module_param(debug, int, 0);
4086 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
4087
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