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1 | /* | |
2 | * Authors: | |
3 | * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se> | |
4 | * Uppsala University and | |
5 | * Swedish University of Agricultural Sciences | |
6 | * | |
7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> | |
8 | * Ben Greear <greearb@candelatech.com> | |
9 | * Jens Låås <jens.laas@data.slu.se> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License | |
13 | * as published by the Free Software Foundation; either version | |
14 | * 2 of the License, or (at your option) any later version. | |
15 | * | |
16 | * | |
17 | * A tool for loading the network with preconfigurated packets. | |
18 | * The tool is implemented as a linux module. Parameters are output | |
19 | * device, delay (to hard_xmit), number of packets, and whether | |
20 | * to use multiple SKBs or just the same one. | |
21 | * pktgen uses the installed interface's output routine. | |
22 | * | |
23 | * Additional hacking by: | |
24 | * | |
25 | * Jens.Laas@data.slu.se | |
26 | * Improved by ANK. 010120. | |
27 | * Improved by ANK even more. 010212. | |
28 | * MAC address typo fixed. 010417 --ro | |
29 | * Integrated. 020301 --DaveM | |
30 | * Added multiskb option 020301 --DaveM | |
31 | * Scaling of results. 020417--sigurdur@linpro.no | |
32 | * Significant re-work of the module: | |
33 | * * Convert to threaded model to more efficiently be able to transmit | |
34 | * and receive on multiple interfaces at once. | |
35 | * * Converted many counters to __u64 to allow longer runs. | |
36 | * * Allow configuration of ranges, like min/max IP address, MACs, | |
37 | * and UDP-ports, for both source and destination, and can | |
38 | * set to use a random distribution or sequentially walk the range. | |
39 | * * Can now change most values after starting. | |
40 | * * Place 12-byte packet in UDP payload with magic number, | |
41 | * sequence number, and timestamp. | |
42 | * * Add receiver code that detects dropped pkts, re-ordered pkts, and | |
43 | * latencies (with micro-second) precision. | |
44 | * * Add IOCTL interface to easily get counters & configuration. | |
45 | * --Ben Greear <greearb@candelatech.com> | |
46 | * | |
47 | * Renamed multiskb to clone_skb and cleaned up sending core for two distinct | |
48 | * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0 | |
49 | * as a "fastpath" with a configurable number of clones after alloc's. | |
50 | * clone_skb=0 means all packets are allocated this also means ranges time | |
51 | * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100 | |
52 | * clones. | |
53 | * | |
54 | * Also moved to /proc/net/pktgen/ | |
55 | * --ro | |
56 | * | |
57 | * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever | |
58 | * mistakes. Also merged in DaveM's patch in the -pre6 patch. | |
59 | * --Ben Greear <greearb@candelatech.com> | |
60 | * | |
61 | * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br) | |
62 | * | |
63 | * | |
64 | * 021124 Finished major redesign and rewrite for new functionality. | |
65 | * See Documentation/networking/pktgen.txt for how to use this. | |
66 | * | |
67 | * The new operation: | |
68 | * For each CPU one thread/process is created at start. This process checks | |
69 | * for running devices in the if_list and sends packets until count is 0 it | |
70 | * also the thread checks the thread->control which is used for inter-process | |
71 | * communication. controlling process "posts" operations to the threads this | |
72 | * way. | |
73 | * The if_list is RCU protected, and the if_lock remains to protect updating | |
74 | * of if_list, from "add_device" as it invoked from userspace (via proc write). | |
75 | * | |
76 | * By design there should only be *one* "controlling" process. In practice | |
77 | * multiple write accesses gives unpredictable result. Understood by "write" | |
78 | * to /proc gives result code thats should be read be the "writer". | |
79 | * For practical use this should be no problem. | |
80 | * | |
81 | * Note when adding devices to a specific CPU there good idea to also assign | |
82 | * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU. | |
83 | * --ro | |
84 | * | |
85 | * Fix refcount off by one if first packet fails, potential null deref, | |
86 | * memleak 030710- KJP | |
87 | * | |
88 | * First "ranges" functionality for ipv6 030726 --ro | |
89 | * | |
90 | * Included flow support. 030802 ANK. | |
91 | * | |
92 | * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org> | |
93 | * | |
94 | * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419 | |
95 | * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604 | |
96 | * | |
97 | * New xmit() return, do_div and misc clean up by Stephen Hemminger | |
98 | * <shemminger@osdl.org> 040923 | |
99 | * | |
100 | * Randy Dunlap fixed u64 printk compiler warning | |
101 | * | |
102 | * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org> | |
103 | * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213 | |
104 | * | |
105 | * Corrections from Nikolai Malykh (nmalykh@bilim.com) | |
106 | * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230 | |
107 | * | |
108 | * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com> | |
109 | * 050103 | |
110 | * | |
111 | * MPLS support by Steven Whitehouse <steve@chygwyn.com> | |
112 | * | |
113 | * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com> | |
114 | * | |
115 | * Fixed src_mac command to set source mac of packet to value specified in | |
116 | * command by Adit Ranadive <adit.262@gmail.com> | |
117 | * | |
118 | */ | |
119 | ||
120 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
121 | ||
122 | #include <linux/sys.h> | |
123 | #include <linux/types.h> | |
124 | #include <linux/module.h> | |
125 | #include <linux/moduleparam.h> | |
126 | #include <linux/kernel.h> | |
127 | #include <linux/mutex.h> | |
128 | #include <linux/sched.h> | |
129 | #include <linux/slab.h> | |
130 | #include <linux/vmalloc.h> | |
131 | #include <linux/unistd.h> | |
132 | #include <linux/string.h> | |
133 | #include <linux/ptrace.h> | |
134 | #include <linux/errno.h> | |
135 | #include <linux/ioport.h> | |
136 | #include <linux/interrupt.h> | |
137 | #include <linux/capability.h> | |
138 | #include <linux/hrtimer.h> | |
139 | #include <linux/freezer.h> | |
140 | #include <linux/delay.h> | |
141 | #include <linux/timer.h> | |
142 | #include <linux/list.h> | |
143 | #include <linux/init.h> | |
144 | #include <linux/skbuff.h> | |
145 | #include <linux/netdevice.h> | |
146 | #include <linux/inet.h> | |
147 | #include <linux/inetdevice.h> | |
148 | #include <linux/rtnetlink.h> | |
149 | #include <linux/if_arp.h> | |
150 | #include <linux/if_vlan.h> | |
151 | #include <linux/in.h> | |
152 | #include <linux/ip.h> | |
153 | #include <linux/ipv6.h> | |
154 | #include <linux/udp.h> | |
155 | #include <linux/proc_fs.h> | |
156 | #include <linux/seq_file.h> | |
157 | #include <linux/wait.h> | |
158 | #include <linux/etherdevice.h> | |
159 | #include <linux/kthread.h> | |
160 | #include <linux/prefetch.h> | |
161 | #include <net/net_namespace.h> | |
162 | #include <net/checksum.h> | |
163 | #include <net/ipv6.h> | |
164 | #include <net/udp.h> | |
165 | #include <net/ip6_checksum.h> | |
166 | #include <net/addrconf.h> | |
167 | #ifdef CONFIG_XFRM | |
168 | #include <net/xfrm.h> | |
169 | #endif | |
170 | #include <net/netns/generic.h> | |
171 | #include <asm/byteorder.h> | |
172 | #include <linux/rcupdate.h> | |
173 | #include <linux/bitops.h> | |
174 | #include <linux/io.h> | |
175 | #include <linux/timex.h> | |
176 | #include <linux/uaccess.h> | |
177 | #include <asm/dma.h> | |
178 | #include <asm/div64.h> /* do_div */ | |
179 | ||
180 | #define VERSION "2.75" | |
181 | #define IP_NAME_SZ 32 | |
182 | #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */ | |
183 | #define MPLS_STACK_BOTTOM htonl(0x00000100) | |
184 | ||
185 | #define func_enter() pr_debug("entering %s\n", __func__); | |
186 | ||
187 | /* Device flag bits */ | |
188 | #define F_IPSRC_RND (1<<0) /* IP-Src Random */ | |
189 | #define F_IPDST_RND (1<<1) /* IP-Dst Random */ | |
190 | #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */ | |
191 | #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */ | |
192 | #define F_MACSRC_RND (1<<4) /* MAC-Src Random */ | |
193 | #define F_MACDST_RND (1<<5) /* MAC-Dst Random */ | |
194 | #define F_TXSIZE_RND (1<<6) /* Transmit size is random */ | |
195 | #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */ | |
196 | #define F_MPLS_RND (1<<8) /* Random MPLS labels */ | |
197 | #define F_VID_RND (1<<9) /* Random VLAN ID */ | |
198 | #define F_SVID_RND (1<<10) /* Random SVLAN ID */ | |
199 | #define F_FLOW_SEQ (1<<11) /* Sequential flows */ | |
200 | #define F_IPSEC_ON (1<<12) /* ipsec on for flows */ | |
201 | #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */ | |
202 | #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */ | |
203 | #define F_NODE (1<<15) /* Node memory alloc*/ | |
204 | #define F_UDPCSUM (1<<16) /* Include UDP checksum */ | |
205 | #define F_NO_TIMESTAMP (1<<17) /* Don't timestamp packets (default TS) */ | |
206 | ||
207 | /* Thread control flag bits */ | |
208 | #define T_STOP (1<<0) /* Stop run */ | |
209 | #define T_RUN (1<<1) /* Start run */ | |
210 | #define T_REMDEVALL (1<<2) /* Remove all devs */ | |
211 | #define T_REMDEV (1<<3) /* Remove one dev */ | |
212 | ||
213 | /* Xmit modes */ | |
214 | #define M_START_XMIT 0 /* Default normal TX */ | |
215 | #define M_NETIF_RECEIVE 1 /* Inject packets into stack */ | |
216 | #define M_QUEUE_XMIT 2 /* Inject packet into qdisc */ | |
217 | ||
218 | /* If lock -- protects updating of if_list */ | |
219 | #define if_lock(t) mutex_lock(&(t->if_lock)); | |
220 | #define if_unlock(t) mutex_unlock(&(t->if_lock)); | |
221 | ||
222 | /* Used to help with determining the pkts on receive */ | |
223 | #define PKTGEN_MAGIC 0xbe9be955 | |
224 | #define PG_PROC_DIR "pktgen" | |
225 | #define PGCTRL "pgctrl" | |
226 | ||
227 | #define MAX_CFLOWS 65536 | |
228 | ||
229 | #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4) | |
230 | #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4) | |
231 | ||
232 | struct flow_state { | |
233 | __be32 cur_daddr; | |
234 | int count; | |
235 | #ifdef CONFIG_XFRM | |
236 | struct xfrm_state *x; | |
237 | #endif | |
238 | __u32 flags; | |
239 | }; | |
240 | ||
241 | /* flow flag bits */ | |
242 | #define F_INIT (1<<0) /* flow has been initialized */ | |
243 | ||
244 | struct pktgen_dev { | |
245 | /* | |
246 | * Try to keep frequent/infrequent used vars. separated. | |
247 | */ | |
248 | struct proc_dir_entry *entry; /* proc file */ | |
249 | struct pktgen_thread *pg_thread;/* the owner */ | |
250 | struct list_head list; /* chaining in the thread's run-queue */ | |
251 | struct rcu_head rcu; /* freed by RCU */ | |
252 | ||
253 | int running; /* if false, the test will stop */ | |
254 | ||
255 | /* If min != max, then we will either do a linear iteration, or | |
256 | * we will do a random selection from within the range. | |
257 | */ | |
258 | __u32 flags; | |
259 | int xmit_mode; | |
260 | int min_pkt_size; | |
261 | int max_pkt_size; | |
262 | int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */ | |
263 | int nfrags; | |
264 | int removal_mark; /* non-zero => the device is marked for | |
265 | * removal by worker thread */ | |
266 | ||
267 | struct page *page; | |
268 | u64 delay; /* nano-seconds */ | |
269 | ||
270 | __u64 count; /* Default No packets to send */ | |
271 | __u64 sofar; /* How many pkts we've sent so far */ | |
272 | __u64 tx_bytes; /* How many bytes we've transmitted */ | |
273 | __u64 errors; /* Errors when trying to transmit, */ | |
274 | ||
275 | /* runtime counters relating to clone_skb */ | |
276 | ||
277 | __u32 clone_count; | |
278 | int last_ok; /* Was last skb sent? | |
279 | * Or a failed transmit of some sort? | |
280 | * This will keep sequence numbers in order | |
281 | */ | |
282 | ktime_t next_tx; | |
283 | ktime_t started_at; | |
284 | ktime_t stopped_at; | |
285 | u64 idle_acc; /* nano-seconds */ | |
286 | ||
287 | __u32 seq_num; | |
288 | ||
289 | int clone_skb; /* | |
290 | * Use multiple SKBs during packet gen. | |
291 | * If this number is greater than 1, then | |
292 | * that many copies of the same packet will be | |
293 | * sent before a new packet is allocated. | |
294 | * If you want to send 1024 identical packets | |
295 | * before creating a new packet, | |
296 | * set clone_skb to 1024. | |
297 | */ | |
298 | ||
299 | char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ | |
300 | char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ | |
301 | char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ | |
302 | char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ | |
303 | ||
304 | struct in6_addr in6_saddr; | |
305 | struct in6_addr in6_daddr; | |
306 | struct in6_addr cur_in6_daddr; | |
307 | struct in6_addr cur_in6_saddr; | |
308 | /* For ranges */ | |
309 | struct in6_addr min_in6_daddr; | |
310 | struct in6_addr max_in6_daddr; | |
311 | struct in6_addr min_in6_saddr; | |
312 | struct in6_addr max_in6_saddr; | |
313 | ||
314 | /* If we're doing ranges, random or incremental, then this | |
315 | * defines the min/max for those ranges. | |
316 | */ | |
317 | __be32 saddr_min; /* inclusive, source IP address */ | |
318 | __be32 saddr_max; /* exclusive, source IP address */ | |
319 | __be32 daddr_min; /* inclusive, dest IP address */ | |
320 | __be32 daddr_max; /* exclusive, dest IP address */ | |
321 | ||
322 | __u16 udp_src_min; /* inclusive, source UDP port */ | |
323 | __u16 udp_src_max; /* exclusive, source UDP port */ | |
324 | __u16 udp_dst_min; /* inclusive, dest UDP port */ | |
325 | __u16 udp_dst_max; /* exclusive, dest UDP port */ | |
326 | ||
327 | /* DSCP + ECN */ | |
328 | __u8 tos; /* six MSB of (former) IPv4 TOS | |
329 | are for dscp codepoint */ | |
330 | __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 | |
331 | (see RFC 3260, sec. 4) */ | |
332 | ||
333 | /* MPLS */ | |
334 | unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */ | |
335 | __be32 labels[MAX_MPLS_LABELS]; | |
336 | ||
337 | /* VLAN/SVLAN (802.1Q/Q-in-Q) */ | |
338 | __u8 vlan_p; | |
339 | __u8 vlan_cfi; | |
340 | __u16 vlan_id; /* 0xffff means no vlan tag */ | |
341 | ||
342 | __u8 svlan_p; | |
343 | __u8 svlan_cfi; | |
344 | __u16 svlan_id; /* 0xffff means no svlan tag */ | |
345 | ||
346 | __u32 src_mac_count; /* How many MACs to iterate through */ | |
347 | __u32 dst_mac_count; /* How many MACs to iterate through */ | |
348 | ||
349 | unsigned char dst_mac[ETH_ALEN]; | |
350 | unsigned char src_mac[ETH_ALEN]; | |
351 | ||
352 | __u32 cur_dst_mac_offset; | |
353 | __u32 cur_src_mac_offset; | |
354 | __be32 cur_saddr; | |
355 | __be32 cur_daddr; | |
356 | __u16 ip_id; | |
357 | __u16 cur_udp_dst; | |
358 | __u16 cur_udp_src; | |
359 | __u16 cur_queue_map; | |
360 | __u32 cur_pkt_size; | |
361 | __u32 last_pkt_size; | |
362 | ||
363 | __u8 hh[14]; | |
364 | /* = { | |
365 | 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, | |
366 | ||
367 | We fill in SRC address later | |
368 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
369 | 0x08, 0x00 | |
370 | }; | |
371 | */ | |
372 | __u16 pad; /* pad out the hh struct to an even 16 bytes */ | |
373 | ||
374 | struct sk_buff *skb; /* skb we are to transmit next, used for when we | |
375 | * are transmitting the same one multiple times | |
376 | */ | |
377 | struct net_device *odev; /* The out-going device. | |
378 | * Note that the device should have it's | |
379 | * pg_info pointer pointing back to this | |
380 | * device. | |
381 | * Set when the user specifies the out-going | |
382 | * device name (not when the inject is | |
383 | * started as it used to do.) | |
384 | */ | |
385 | char odevname[32]; | |
386 | struct flow_state *flows; | |
387 | unsigned int cflows; /* Concurrent flows (config) */ | |
388 | unsigned int lflow; /* Flow length (config) */ | |
389 | unsigned int nflows; /* accumulated flows (stats) */ | |
390 | unsigned int curfl; /* current sequenced flow (state)*/ | |
391 | ||
392 | u16 queue_map_min; | |
393 | u16 queue_map_max; | |
394 | __u32 skb_priority; /* skb priority field */ | |
395 | unsigned int burst; /* number of duplicated packets to burst */ | |
396 | int node; /* Memory node */ | |
397 | ||
398 | #ifdef CONFIG_XFRM | |
399 | __u8 ipsmode; /* IPSEC mode (config) */ | |
400 | __u8 ipsproto; /* IPSEC type (config) */ | |
401 | __u32 spi; | |
402 | struct dst_entry dst; | |
403 | struct dst_ops dstops; | |
404 | #endif | |
405 | char result[512]; | |
406 | }; | |
407 | ||
408 | struct pktgen_hdr { | |
409 | __be32 pgh_magic; | |
410 | __be32 seq_num; | |
411 | __be32 tv_sec; | |
412 | __be32 tv_usec; | |
413 | }; | |
414 | ||
415 | ||
416 | static unsigned int pg_net_id __read_mostly; | |
417 | ||
418 | struct pktgen_net { | |
419 | struct net *net; | |
420 | struct proc_dir_entry *proc_dir; | |
421 | struct list_head pktgen_threads; | |
422 | bool pktgen_exiting; | |
423 | }; | |
424 | ||
425 | struct pktgen_thread { | |
426 | struct mutex if_lock; /* for list of devices */ | |
427 | struct list_head if_list; /* All device here */ | |
428 | struct list_head th_list; | |
429 | struct task_struct *tsk; | |
430 | char result[512]; | |
431 | ||
432 | /* Field for thread to receive "posted" events terminate, | |
433 | stop ifs etc. */ | |
434 | ||
435 | u32 control; | |
436 | int cpu; | |
437 | ||
438 | wait_queue_head_t queue; | |
439 | struct completion start_done; | |
440 | struct pktgen_net *net; | |
441 | }; | |
442 | ||
443 | #define REMOVE 1 | |
444 | #define FIND 0 | |
445 | ||
446 | static const char version[] = | |
447 | "Packet Generator for packet performance testing. " | |
448 | "Version: " VERSION "\n"; | |
449 | ||
450 | static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i); | |
451 | static int pktgen_add_device(struct pktgen_thread *t, const char *ifname); | |
452 | static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, | |
453 | const char *ifname, bool exact); | |
454 | static int pktgen_device_event(struct notifier_block *, unsigned long, void *); | |
455 | static void pktgen_run_all_threads(struct pktgen_net *pn); | |
456 | static void pktgen_reset_all_threads(struct pktgen_net *pn); | |
457 | static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn); | |
458 | ||
459 | static void pktgen_stop(struct pktgen_thread *t); | |
460 | static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); | |
461 | ||
462 | /* Module parameters, defaults. */ | |
463 | static int pg_count_d __read_mostly = 1000; | |
464 | static int pg_delay_d __read_mostly; | |
465 | static int pg_clone_skb_d __read_mostly; | |
466 | static int debug __read_mostly; | |
467 | ||
468 | static DEFINE_MUTEX(pktgen_thread_lock); | |
469 | ||
470 | static struct notifier_block pktgen_notifier_block = { | |
471 | .notifier_call = pktgen_device_event, | |
472 | }; | |
473 | ||
474 | /* | |
475 | * /proc handling functions | |
476 | * | |
477 | */ | |
478 | ||
479 | static int pgctrl_show(struct seq_file *seq, void *v) | |
480 | { | |
481 | seq_puts(seq, version); | |
482 | return 0; | |
483 | } | |
484 | ||
485 | static ssize_t pgctrl_write(struct file *file, const char __user *buf, | |
486 | size_t count, loff_t *ppos) | |
487 | { | |
488 | char data[128]; | |
489 | struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id); | |
490 | ||
491 | if (!capable(CAP_NET_ADMIN)) | |
492 | return -EPERM; | |
493 | ||
494 | if (count == 0) | |
495 | return -EINVAL; | |
496 | ||
497 | if (count > sizeof(data)) | |
498 | count = sizeof(data); | |
499 | ||
500 | if (copy_from_user(data, buf, count)) | |
501 | return -EFAULT; | |
502 | ||
503 | data[count - 1] = 0; /* Strip trailing '\n' and terminate string */ | |
504 | ||
505 | if (!strcmp(data, "stop")) | |
506 | pktgen_stop_all_threads_ifs(pn); | |
507 | ||
508 | else if (!strcmp(data, "start")) | |
509 | pktgen_run_all_threads(pn); | |
510 | ||
511 | else if (!strcmp(data, "reset")) | |
512 | pktgen_reset_all_threads(pn); | |
513 | ||
514 | else | |
515 | return -EINVAL; | |
516 | ||
517 | return count; | |
518 | } | |
519 | ||
520 | static int pgctrl_open(struct inode *inode, struct file *file) | |
521 | { | |
522 | return single_open(file, pgctrl_show, PDE_DATA(inode)); | |
523 | } | |
524 | ||
525 | static const struct file_operations pktgen_fops = { | |
526 | .owner = THIS_MODULE, | |
527 | .open = pgctrl_open, | |
528 | .read = seq_read, | |
529 | .llseek = seq_lseek, | |
530 | .write = pgctrl_write, | |
531 | .release = single_release, | |
532 | }; | |
533 | ||
534 | static int pktgen_if_show(struct seq_file *seq, void *v) | |
535 | { | |
536 | const struct pktgen_dev *pkt_dev = seq->private; | |
537 | ktime_t stopped; | |
538 | u64 idle; | |
539 | ||
540 | seq_printf(seq, | |
541 | "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", | |
542 | (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, | |
543 | pkt_dev->max_pkt_size); | |
544 | ||
545 | seq_printf(seq, | |
546 | " frags: %d delay: %llu clone_skb: %d ifname: %s\n", | |
547 | pkt_dev->nfrags, (unsigned long long) pkt_dev->delay, | |
548 | pkt_dev->clone_skb, pkt_dev->odevname); | |
549 | ||
550 | seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, | |
551 | pkt_dev->lflow); | |
552 | ||
553 | seq_printf(seq, | |
554 | " queue_map_min: %u queue_map_max: %u\n", | |
555 | pkt_dev->queue_map_min, | |
556 | pkt_dev->queue_map_max); | |
557 | ||
558 | if (pkt_dev->skb_priority) | |
559 | seq_printf(seq, " skb_priority: %u\n", | |
560 | pkt_dev->skb_priority); | |
561 | ||
562 | if (pkt_dev->flags & F_IPV6) { | |
563 | seq_printf(seq, | |
564 | " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n" | |
565 | " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n", | |
566 | &pkt_dev->in6_saddr, | |
567 | &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr, | |
568 | &pkt_dev->in6_daddr, | |
569 | &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr); | |
570 | } else { | |
571 | seq_printf(seq, | |
572 | " dst_min: %s dst_max: %s\n", | |
573 | pkt_dev->dst_min, pkt_dev->dst_max); | |
574 | seq_printf(seq, | |
575 | " src_min: %s src_max: %s\n", | |
576 | pkt_dev->src_min, pkt_dev->src_max); | |
577 | } | |
578 | ||
579 | seq_puts(seq, " src_mac: "); | |
580 | ||
581 | seq_printf(seq, "%pM ", | |
582 | is_zero_ether_addr(pkt_dev->src_mac) ? | |
583 | pkt_dev->odev->dev_addr : pkt_dev->src_mac); | |
584 | ||
585 | seq_puts(seq, "dst_mac: "); | |
586 | seq_printf(seq, "%pM\n", pkt_dev->dst_mac); | |
587 | ||
588 | seq_printf(seq, | |
589 | " udp_src_min: %d udp_src_max: %d" | |
590 | " udp_dst_min: %d udp_dst_max: %d\n", | |
591 | pkt_dev->udp_src_min, pkt_dev->udp_src_max, | |
592 | pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); | |
593 | ||
594 | seq_printf(seq, | |
595 | " src_mac_count: %d dst_mac_count: %d\n", | |
596 | pkt_dev->src_mac_count, pkt_dev->dst_mac_count); | |
597 | ||
598 | if (pkt_dev->nr_labels) { | |
599 | unsigned int i; | |
600 | seq_puts(seq, " mpls: "); | |
601 | for (i = 0; i < pkt_dev->nr_labels; i++) | |
602 | seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), | |
603 | i == pkt_dev->nr_labels-1 ? "\n" : ", "); | |
604 | } | |
605 | ||
606 | if (pkt_dev->vlan_id != 0xffff) | |
607 | seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", | |
608 | pkt_dev->vlan_id, pkt_dev->vlan_p, | |
609 | pkt_dev->vlan_cfi); | |
610 | ||
611 | if (pkt_dev->svlan_id != 0xffff) | |
612 | seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", | |
613 | pkt_dev->svlan_id, pkt_dev->svlan_p, | |
614 | pkt_dev->svlan_cfi); | |
615 | ||
616 | if (pkt_dev->tos) | |
617 | seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); | |
618 | ||
619 | if (pkt_dev->traffic_class) | |
620 | seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); | |
621 | ||
622 | if (pkt_dev->burst > 1) | |
623 | seq_printf(seq, " burst: %d\n", pkt_dev->burst); | |
624 | ||
625 | if (pkt_dev->node >= 0) | |
626 | seq_printf(seq, " node: %d\n", pkt_dev->node); | |
627 | ||
628 | if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) | |
629 | seq_puts(seq, " xmit_mode: netif_receive\n"); | |
630 | else if (pkt_dev->xmit_mode == M_QUEUE_XMIT) | |
631 | seq_puts(seq, " xmit_mode: xmit_queue\n"); | |
632 | ||
633 | seq_puts(seq, " Flags: "); | |
634 | ||
635 | if (pkt_dev->flags & F_IPV6) | |
636 | seq_puts(seq, "IPV6 "); | |
637 | ||
638 | if (pkt_dev->flags & F_IPSRC_RND) | |
639 | seq_puts(seq, "IPSRC_RND "); | |
640 | ||
641 | if (pkt_dev->flags & F_IPDST_RND) | |
642 | seq_puts(seq, "IPDST_RND "); | |
643 | ||
644 | if (pkt_dev->flags & F_TXSIZE_RND) | |
645 | seq_puts(seq, "TXSIZE_RND "); | |
646 | ||
647 | if (pkt_dev->flags & F_UDPSRC_RND) | |
648 | seq_puts(seq, "UDPSRC_RND "); | |
649 | ||
650 | if (pkt_dev->flags & F_UDPDST_RND) | |
651 | seq_puts(seq, "UDPDST_RND "); | |
652 | ||
653 | if (pkt_dev->flags & F_UDPCSUM) | |
654 | seq_puts(seq, "UDPCSUM "); | |
655 | ||
656 | if (pkt_dev->flags & F_NO_TIMESTAMP) | |
657 | seq_puts(seq, "NO_TIMESTAMP "); | |
658 | ||
659 | if (pkt_dev->flags & F_MPLS_RND) | |
660 | seq_puts(seq, "MPLS_RND "); | |
661 | ||
662 | if (pkt_dev->flags & F_QUEUE_MAP_RND) | |
663 | seq_puts(seq, "QUEUE_MAP_RND "); | |
664 | ||
665 | if (pkt_dev->flags & F_QUEUE_MAP_CPU) | |
666 | seq_puts(seq, "QUEUE_MAP_CPU "); | |
667 | ||
668 | if (pkt_dev->cflows) { | |
669 | if (pkt_dev->flags & F_FLOW_SEQ) | |
670 | seq_puts(seq, "FLOW_SEQ "); /*in sequence flows*/ | |
671 | else | |
672 | seq_puts(seq, "FLOW_RND "); | |
673 | } | |
674 | ||
675 | #ifdef CONFIG_XFRM | |
676 | if (pkt_dev->flags & F_IPSEC_ON) { | |
677 | seq_puts(seq, "IPSEC "); | |
678 | if (pkt_dev->spi) | |
679 | seq_printf(seq, "spi:%u", pkt_dev->spi); | |
680 | } | |
681 | #endif | |
682 | ||
683 | if (pkt_dev->flags & F_MACSRC_RND) | |
684 | seq_puts(seq, "MACSRC_RND "); | |
685 | ||
686 | if (pkt_dev->flags & F_MACDST_RND) | |
687 | seq_puts(seq, "MACDST_RND "); | |
688 | ||
689 | if (pkt_dev->flags & F_VID_RND) | |
690 | seq_puts(seq, "VID_RND "); | |
691 | ||
692 | if (pkt_dev->flags & F_SVID_RND) | |
693 | seq_puts(seq, "SVID_RND "); | |
694 | ||
695 | if (pkt_dev->flags & F_NODE) | |
696 | seq_puts(seq, "NODE_ALLOC "); | |
697 | ||
698 | seq_puts(seq, "\n"); | |
699 | ||
700 | /* not really stopped, more like last-running-at */ | |
701 | stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at; | |
702 | idle = pkt_dev->idle_acc; | |
703 | do_div(idle, NSEC_PER_USEC); | |
704 | ||
705 | seq_printf(seq, | |
706 | "Current:\n pkts-sofar: %llu errors: %llu\n", | |
707 | (unsigned long long)pkt_dev->sofar, | |
708 | (unsigned long long)pkt_dev->errors); | |
709 | ||
710 | seq_printf(seq, | |
711 | " started: %lluus stopped: %lluus idle: %lluus\n", | |
712 | (unsigned long long) ktime_to_us(pkt_dev->started_at), | |
713 | (unsigned long long) ktime_to_us(stopped), | |
714 | (unsigned long long) idle); | |
715 | ||
716 | seq_printf(seq, | |
717 | " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", | |
718 | pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, | |
719 | pkt_dev->cur_src_mac_offset); | |
720 | ||
721 | if (pkt_dev->flags & F_IPV6) { | |
722 | seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n", | |
723 | &pkt_dev->cur_in6_saddr, | |
724 | &pkt_dev->cur_in6_daddr); | |
725 | } else | |
726 | seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n", | |
727 | &pkt_dev->cur_saddr, &pkt_dev->cur_daddr); | |
728 | ||
729 | seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", | |
730 | pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); | |
731 | ||
732 | seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); | |
733 | ||
734 | seq_printf(seq, " flows: %u\n", pkt_dev->nflows); | |
735 | ||
736 | if (pkt_dev->result[0]) | |
737 | seq_printf(seq, "Result: %s\n", pkt_dev->result); | |
738 | else | |
739 | seq_puts(seq, "Result: Idle\n"); | |
740 | ||
741 | return 0; | |
742 | } | |
743 | ||
744 | ||
745 | static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, | |
746 | __u32 *num) | |
747 | { | |
748 | int i = 0; | |
749 | *num = 0; | |
750 | ||
751 | for (; i < maxlen; i++) { | |
752 | int value; | |
753 | char c; | |
754 | *num <<= 4; | |
755 | if (get_user(c, &user_buffer[i])) | |
756 | return -EFAULT; | |
757 | value = hex_to_bin(c); | |
758 | if (value >= 0) | |
759 | *num |= value; | |
760 | else | |
761 | break; | |
762 | } | |
763 | return i; | |
764 | } | |
765 | ||
766 | static int count_trail_chars(const char __user * user_buffer, | |
767 | unsigned int maxlen) | |
768 | { | |
769 | int i; | |
770 | ||
771 | for (i = 0; i < maxlen; i++) { | |
772 | char c; | |
773 | if (get_user(c, &user_buffer[i])) | |
774 | return -EFAULT; | |
775 | switch (c) { | |
776 | case '\"': | |
777 | case '\n': | |
778 | case '\r': | |
779 | case '\t': | |
780 | case ' ': | |
781 | case '=': | |
782 | break; | |
783 | default: | |
784 | goto done; | |
785 | } | |
786 | } | |
787 | done: | |
788 | return i; | |
789 | } | |
790 | ||
791 | static long num_arg(const char __user *user_buffer, unsigned long maxlen, | |
792 | unsigned long *num) | |
793 | { | |
794 | int i; | |
795 | *num = 0; | |
796 | ||
797 | for (i = 0; i < maxlen; i++) { | |
798 | char c; | |
799 | if (get_user(c, &user_buffer[i])) | |
800 | return -EFAULT; | |
801 | if ((c >= '0') && (c <= '9')) { | |
802 | *num *= 10; | |
803 | *num += c - '0'; | |
804 | } else | |
805 | break; | |
806 | } | |
807 | return i; | |
808 | } | |
809 | ||
810 | static int strn_len(const char __user * user_buffer, unsigned int maxlen) | |
811 | { | |
812 | int i; | |
813 | ||
814 | for (i = 0; i < maxlen; i++) { | |
815 | char c; | |
816 | if (get_user(c, &user_buffer[i])) | |
817 | return -EFAULT; | |
818 | switch (c) { | |
819 | case '\"': | |
820 | case '\n': | |
821 | case '\r': | |
822 | case '\t': | |
823 | case ' ': | |
824 | goto done_str; | |
825 | default: | |
826 | break; | |
827 | } | |
828 | } | |
829 | done_str: | |
830 | return i; | |
831 | } | |
832 | ||
833 | static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) | |
834 | { | |
835 | unsigned int n = 0; | |
836 | char c; | |
837 | ssize_t i = 0; | |
838 | int len; | |
839 | ||
840 | pkt_dev->nr_labels = 0; | |
841 | do { | |
842 | __u32 tmp; | |
843 | len = hex32_arg(&buffer[i], 8, &tmp); | |
844 | if (len <= 0) | |
845 | return len; | |
846 | pkt_dev->labels[n] = htonl(tmp); | |
847 | if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) | |
848 | pkt_dev->flags |= F_MPLS_RND; | |
849 | i += len; | |
850 | if (get_user(c, &buffer[i])) | |
851 | return -EFAULT; | |
852 | i++; | |
853 | n++; | |
854 | if (n >= MAX_MPLS_LABELS) | |
855 | return -E2BIG; | |
856 | } while (c == ','); | |
857 | ||
858 | pkt_dev->nr_labels = n; | |
859 | return i; | |
860 | } | |
861 | ||
862 | static ssize_t pktgen_if_write(struct file *file, | |
863 | const char __user * user_buffer, size_t count, | |
864 | loff_t * offset) | |
865 | { | |
866 | struct seq_file *seq = file->private_data; | |
867 | struct pktgen_dev *pkt_dev = seq->private; | |
868 | int i, max, len; | |
869 | char name[16], valstr[32]; | |
870 | unsigned long value = 0; | |
871 | char *pg_result = NULL; | |
872 | int tmp = 0; | |
873 | char buf[128]; | |
874 | ||
875 | pg_result = &(pkt_dev->result[0]); | |
876 | ||
877 | if (count < 1) { | |
878 | pr_warn("wrong command format\n"); | |
879 | return -EINVAL; | |
880 | } | |
881 | ||
882 | max = count; | |
883 | tmp = count_trail_chars(user_buffer, max); | |
884 | if (tmp < 0) { | |
885 | pr_warn("illegal format\n"); | |
886 | return tmp; | |
887 | } | |
888 | i = tmp; | |
889 | ||
890 | /* Read variable name */ | |
891 | ||
892 | len = strn_len(&user_buffer[i], sizeof(name) - 1); | |
893 | if (len < 0) | |
894 | return len; | |
895 | ||
896 | memset(name, 0, sizeof(name)); | |
897 | if (copy_from_user(name, &user_buffer[i], len)) | |
898 | return -EFAULT; | |
899 | i += len; | |
900 | ||
901 | max = count - i; | |
902 | len = count_trail_chars(&user_buffer[i], max); | |
903 | if (len < 0) | |
904 | return len; | |
905 | ||
906 | i += len; | |
907 | ||
908 | if (debug) { | |
909 | size_t copy = min_t(size_t, count, 1023); | |
910 | char tb[copy + 1]; | |
911 | if (copy_from_user(tb, user_buffer, copy)) | |
912 | return -EFAULT; | |
913 | tb[copy] = 0; | |
914 | pr_debug("%s,%lu buffer -:%s:-\n", | |
915 | name, (unsigned long)count, tb); | |
916 | } | |
917 | ||
918 | if (!strcmp(name, "min_pkt_size")) { | |
919 | len = num_arg(&user_buffer[i], 10, &value); | |
920 | if (len < 0) | |
921 | return len; | |
922 | ||
923 | i += len; | |
924 | if (value < 14 + 20 + 8) | |
925 | value = 14 + 20 + 8; | |
926 | if (value != pkt_dev->min_pkt_size) { | |
927 | pkt_dev->min_pkt_size = value; | |
928 | pkt_dev->cur_pkt_size = value; | |
929 | } | |
930 | sprintf(pg_result, "OK: min_pkt_size=%u", | |
931 | pkt_dev->min_pkt_size); | |
932 | return count; | |
933 | } | |
934 | ||
935 | if (!strcmp(name, "max_pkt_size")) { | |
936 | len = num_arg(&user_buffer[i], 10, &value); | |
937 | if (len < 0) | |
938 | return len; | |
939 | ||
940 | i += len; | |
941 | if (value < 14 + 20 + 8) | |
942 | value = 14 + 20 + 8; | |
943 | if (value != pkt_dev->max_pkt_size) { | |
944 | pkt_dev->max_pkt_size = value; | |
945 | pkt_dev->cur_pkt_size = value; | |
946 | } | |
947 | sprintf(pg_result, "OK: max_pkt_size=%u", | |
948 | pkt_dev->max_pkt_size); | |
949 | return count; | |
950 | } | |
951 | ||
952 | /* Shortcut for min = max */ | |
953 | ||
954 | if (!strcmp(name, "pkt_size")) { | |
955 | len = num_arg(&user_buffer[i], 10, &value); | |
956 | if (len < 0) | |
957 | return len; | |
958 | ||
959 | i += len; | |
960 | if (value < 14 + 20 + 8) | |
961 | value = 14 + 20 + 8; | |
962 | if (value != pkt_dev->min_pkt_size) { | |
963 | pkt_dev->min_pkt_size = value; | |
964 | pkt_dev->max_pkt_size = value; | |
965 | pkt_dev->cur_pkt_size = value; | |
966 | } | |
967 | sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); | |
968 | return count; | |
969 | } | |
970 | ||
971 | if (!strcmp(name, "debug")) { | |
972 | len = num_arg(&user_buffer[i], 10, &value); | |
973 | if (len < 0) | |
974 | return len; | |
975 | ||
976 | i += len; | |
977 | debug = value; | |
978 | sprintf(pg_result, "OK: debug=%u", debug); | |
979 | return count; | |
980 | } | |
981 | ||
982 | if (!strcmp(name, "frags")) { | |
983 | len = num_arg(&user_buffer[i], 10, &value); | |
984 | if (len < 0) | |
985 | return len; | |
986 | ||
987 | i += len; | |
988 | pkt_dev->nfrags = value; | |
989 | sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); | |
990 | return count; | |
991 | } | |
992 | if (!strcmp(name, "delay")) { | |
993 | len = num_arg(&user_buffer[i], 10, &value); | |
994 | if (len < 0) | |
995 | return len; | |
996 | ||
997 | i += len; | |
998 | if (value == 0x7FFFFFFF) | |
999 | pkt_dev->delay = ULLONG_MAX; | |
1000 | else | |
1001 | pkt_dev->delay = (u64)value; | |
1002 | ||
1003 | sprintf(pg_result, "OK: delay=%llu", | |
1004 | (unsigned long long) pkt_dev->delay); | |
1005 | return count; | |
1006 | } | |
1007 | if (!strcmp(name, "rate")) { | |
1008 | len = num_arg(&user_buffer[i], 10, &value); | |
1009 | if (len < 0) | |
1010 | return len; | |
1011 | ||
1012 | i += len; | |
1013 | if (!value) | |
1014 | return len; | |
1015 | pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value; | |
1016 | if (debug) | |
1017 | pr_info("Delay set at: %llu ns\n", pkt_dev->delay); | |
1018 | ||
1019 | sprintf(pg_result, "OK: rate=%lu", value); | |
1020 | return count; | |
1021 | } | |
1022 | if (!strcmp(name, "ratep")) { | |
1023 | len = num_arg(&user_buffer[i], 10, &value); | |
1024 | if (len < 0) | |
1025 | return len; | |
1026 | ||
1027 | i += len; | |
1028 | if (!value) | |
1029 | return len; | |
1030 | pkt_dev->delay = NSEC_PER_SEC/value; | |
1031 | if (debug) | |
1032 | pr_info("Delay set at: %llu ns\n", pkt_dev->delay); | |
1033 | ||
1034 | sprintf(pg_result, "OK: rate=%lu", value); | |
1035 | return count; | |
1036 | } | |
1037 | if (!strcmp(name, "udp_src_min")) { | |
1038 | len = num_arg(&user_buffer[i], 10, &value); | |
1039 | if (len < 0) | |
1040 | return len; | |
1041 | ||
1042 | i += len; | |
1043 | if (value != pkt_dev->udp_src_min) { | |
1044 | pkt_dev->udp_src_min = value; | |
1045 | pkt_dev->cur_udp_src = value; | |
1046 | } | |
1047 | sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); | |
1048 | return count; | |
1049 | } | |
1050 | if (!strcmp(name, "udp_dst_min")) { | |
1051 | len = num_arg(&user_buffer[i], 10, &value); | |
1052 | if (len < 0) | |
1053 | return len; | |
1054 | ||
1055 | i += len; | |
1056 | if (value != pkt_dev->udp_dst_min) { | |
1057 | pkt_dev->udp_dst_min = value; | |
1058 | pkt_dev->cur_udp_dst = value; | |
1059 | } | |
1060 | sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); | |
1061 | return count; | |
1062 | } | |
1063 | if (!strcmp(name, "udp_src_max")) { | |
1064 | len = num_arg(&user_buffer[i], 10, &value); | |
1065 | if (len < 0) | |
1066 | return len; | |
1067 | ||
1068 | i += len; | |
1069 | if (value != pkt_dev->udp_src_max) { | |
1070 | pkt_dev->udp_src_max = value; | |
1071 | pkt_dev->cur_udp_src = value; | |
1072 | } | |
1073 | sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); | |
1074 | return count; | |
1075 | } | |
1076 | if (!strcmp(name, "udp_dst_max")) { | |
1077 | len = num_arg(&user_buffer[i], 10, &value); | |
1078 | if (len < 0) | |
1079 | return len; | |
1080 | ||
1081 | i += len; | |
1082 | if (value != pkt_dev->udp_dst_max) { | |
1083 | pkt_dev->udp_dst_max = value; | |
1084 | pkt_dev->cur_udp_dst = value; | |
1085 | } | |
1086 | sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); | |
1087 | return count; | |
1088 | } | |
1089 | if (!strcmp(name, "clone_skb")) { | |
1090 | len = num_arg(&user_buffer[i], 10, &value); | |
1091 | if (len < 0) | |
1092 | return len; | |
1093 | if ((value > 0) && | |
1094 | ((pkt_dev->xmit_mode == M_NETIF_RECEIVE) || | |
1095 | !(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING))) | |
1096 | return -ENOTSUPP; | |
1097 | i += len; | |
1098 | pkt_dev->clone_skb = value; | |
1099 | ||
1100 | sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); | |
1101 | return count; | |
1102 | } | |
1103 | if (!strcmp(name, "count")) { | |
1104 | len = num_arg(&user_buffer[i], 10, &value); | |
1105 | if (len < 0) | |
1106 | return len; | |
1107 | ||
1108 | i += len; | |
1109 | pkt_dev->count = value; | |
1110 | sprintf(pg_result, "OK: count=%llu", | |
1111 | (unsigned long long)pkt_dev->count); | |
1112 | return count; | |
1113 | } | |
1114 | if (!strcmp(name, "src_mac_count")) { | |
1115 | len = num_arg(&user_buffer[i], 10, &value); | |
1116 | if (len < 0) | |
1117 | return len; | |
1118 | ||
1119 | i += len; | |
1120 | if (pkt_dev->src_mac_count != value) { | |
1121 | pkt_dev->src_mac_count = value; | |
1122 | pkt_dev->cur_src_mac_offset = 0; | |
1123 | } | |
1124 | sprintf(pg_result, "OK: src_mac_count=%d", | |
1125 | pkt_dev->src_mac_count); | |
1126 | return count; | |
1127 | } | |
1128 | if (!strcmp(name, "dst_mac_count")) { | |
1129 | len = num_arg(&user_buffer[i], 10, &value); | |
1130 | if (len < 0) | |
1131 | return len; | |
1132 | ||
1133 | i += len; | |
1134 | if (pkt_dev->dst_mac_count != value) { | |
1135 | pkt_dev->dst_mac_count = value; | |
1136 | pkt_dev->cur_dst_mac_offset = 0; | |
1137 | } | |
1138 | sprintf(pg_result, "OK: dst_mac_count=%d", | |
1139 | pkt_dev->dst_mac_count); | |
1140 | return count; | |
1141 | } | |
1142 | if (!strcmp(name, "burst")) { | |
1143 | len = num_arg(&user_buffer[i], 10, &value); | |
1144 | if (len < 0) | |
1145 | return len; | |
1146 | ||
1147 | i += len; | |
1148 | if ((value > 1) && | |
1149 | ((pkt_dev->xmit_mode == M_QUEUE_XMIT) || | |
1150 | ((pkt_dev->xmit_mode == M_START_XMIT) && | |
1151 | (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING))))) | |
1152 | return -ENOTSUPP; | |
1153 | pkt_dev->burst = value < 1 ? 1 : value; | |
1154 | sprintf(pg_result, "OK: burst=%d", pkt_dev->burst); | |
1155 | return count; | |
1156 | } | |
1157 | if (!strcmp(name, "node")) { | |
1158 | len = num_arg(&user_buffer[i], 10, &value); | |
1159 | if (len < 0) | |
1160 | return len; | |
1161 | ||
1162 | i += len; | |
1163 | ||
1164 | if (node_possible(value)) { | |
1165 | pkt_dev->node = value; | |
1166 | sprintf(pg_result, "OK: node=%d", pkt_dev->node); | |
1167 | if (pkt_dev->page) { | |
1168 | put_page(pkt_dev->page); | |
1169 | pkt_dev->page = NULL; | |
1170 | } | |
1171 | } | |
1172 | else | |
1173 | sprintf(pg_result, "ERROR: node not possible"); | |
1174 | return count; | |
1175 | } | |
1176 | if (!strcmp(name, "xmit_mode")) { | |
1177 | char f[32]; | |
1178 | ||
1179 | memset(f, 0, 32); | |
1180 | len = strn_len(&user_buffer[i], sizeof(f) - 1); | |
1181 | if (len < 0) | |
1182 | return len; | |
1183 | ||
1184 | if (copy_from_user(f, &user_buffer[i], len)) | |
1185 | return -EFAULT; | |
1186 | i += len; | |
1187 | ||
1188 | if (strcmp(f, "start_xmit") == 0) { | |
1189 | pkt_dev->xmit_mode = M_START_XMIT; | |
1190 | } else if (strcmp(f, "netif_receive") == 0) { | |
1191 | /* clone_skb set earlier, not supported in this mode */ | |
1192 | if (pkt_dev->clone_skb > 0) | |
1193 | return -ENOTSUPP; | |
1194 | ||
1195 | pkt_dev->xmit_mode = M_NETIF_RECEIVE; | |
1196 | ||
1197 | /* make sure new packet is allocated every time | |
1198 | * pktgen_xmit() is called | |
1199 | */ | |
1200 | pkt_dev->last_ok = 1; | |
1201 | ||
1202 | /* override clone_skb if user passed default value | |
1203 | * at module loading time | |
1204 | */ | |
1205 | pkt_dev->clone_skb = 0; | |
1206 | } else if (strcmp(f, "queue_xmit") == 0) { | |
1207 | pkt_dev->xmit_mode = M_QUEUE_XMIT; | |
1208 | pkt_dev->last_ok = 1; | |
1209 | } else { | |
1210 | sprintf(pg_result, | |
1211 | "xmit_mode -:%s:- unknown\nAvailable modes: %s", | |
1212 | f, "start_xmit, netif_receive\n"); | |
1213 | return count; | |
1214 | } | |
1215 | sprintf(pg_result, "OK: xmit_mode=%s", f); | |
1216 | return count; | |
1217 | } | |
1218 | if (!strcmp(name, "flag")) { | |
1219 | char f[32]; | |
1220 | memset(f, 0, 32); | |
1221 | len = strn_len(&user_buffer[i], sizeof(f) - 1); | |
1222 | if (len < 0) | |
1223 | return len; | |
1224 | ||
1225 | if (copy_from_user(f, &user_buffer[i], len)) | |
1226 | return -EFAULT; | |
1227 | i += len; | |
1228 | if (strcmp(f, "IPSRC_RND") == 0) | |
1229 | pkt_dev->flags |= F_IPSRC_RND; | |
1230 | ||
1231 | else if (strcmp(f, "!IPSRC_RND") == 0) | |
1232 | pkt_dev->flags &= ~F_IPSRC_RND; | |
1233 | ||
1234 | else if (strcmp(f, "TXSIZE_RND") == 0) | |
1235 | pkt_dev->flags |= F_TXSIZE_RND; | |
1236 | ||
1237 | else if (strcmp(f, "!TXSIZE_RND") == 0) | |
1238 | pkt_dev->flags &= ~F_TXSIZE_RND; | |
1239 | ||
1240 | else if (strcmp(f, "IPDST_RND") == 0) | |
1241 | pkt_dev->flags |= F_IPDST_RND; | |
1242 | ||
1243 | else if (strcmp(f, "!IPDST_RND") == 0) | |
1244 | pkt_dev->flags &= ~F_IPDST_RND; | |
1245 | ||
1246 | else if (strcmp(f, "UDPSRC_RND") == 0) | |
1247 | pkt_dev->flags |= F_UDPSRC_RND; | |
1248 | ||
1249 | else if (strcmp(f, "!UDPSRC_RND") == 0) | |
1250 | pkt_dev->flags &= ~F_UDPSRC_RND; | |
1251 | ||
1252 | else if (strcmp(f, "UDPDST_RND") == 0) | |
1253 | pkt_dev->flags |= F_UDPDST_RND; | |
1254 | ||
1255 | else if (strcmp(f, "!UDPDST_RND") == 0) | |
1256 | pkt_dev->flags &= ~F_UDPDST_RND; | |
1257 | ||
1258 | else if (strcmp(f, "MACSRC_RND") == 0) | |
1259 | pkt_dev->flags |= F_MACSRC_RND; | |
1260 | ||
1261 | else if (strcmp(f, "!MACSRC_RND") == 0) | |
1262 | pkt_dev->flags &= ~F_MACSRC_RND; | |
1263 | ||
1264 | else if (strcmp(f, "MACDST_RND") == 0) | |
1265 | pkt_dev->flags |= F_MACDST_RND; | |
1266 | ||
1267 | else if (strcmp(f, "!MACDST_RND") == 0) | |
1268 | pkt_dev->flags &= ~F_MACDST_RND; | |
1269 | ||
1270 | else if (strcmp(f, "MPLS_RND") == 0) | |
1271 | pkt_dev->flags |= F_MPLS_RND; | |
1272 | ||
1273 | else if (strcmp(f, "!MPLS_RND") == 0) | |
1274 | pkt_dev->flags &= ~F_MPLS_RND; | |
1275 | ||
1276 | else if (strcmp(f, "VID_RND") == 0) | |
1277 | pkt_dev->flags |= F_VID_RND; | |
1278 | ||
1279 | else if (strcmp(f, "!VID_RND") == 0) | |
1280 | pkt_dev->flags &= ~F_VID_RND; | |
1281 | ||
1282 | else if (strcmp(f, "SVID_RND") == 0) | |
1283 | pkt_dev->flags |= F_SVID_RND; | |
1284 | ||
1285 | else if (strcmp(f, "!SVID_RND") == 0) | |
1286 | pkt_dev->flags &= ~F_SVID_RND; | |
1287 | ||
1288 | else if (strcmp(f, "FLOW_SEQ") == 0) | |
1289 | pkt_dev->flags |= F_FLOW_SEQ; | |
1290 | ||
1291 | else if (strcmp(f, "QUEUE_MAP_RND") == 0) | |
1292 | pkt_dev->flags |= F_QUEUE_MAP_RND; | |
1293 | ||
1294 | else if (strcmp(f, "!QUEUE_MAP_RND") == 0) | |
1295 | pkt_dev->flags &= ~F_QUEUE_MAP_RND; | |
1296 | ||
1297 | else if (strcmp(f, "QUEUE_MAP_CPU") == 0) | |
1298 | pkt_dev->flags |= F_QUEUE_MAP_CPU; | |
1299 | ||
1300 | else if (strcmp(f, "!QUEUE_MAP_CPU") == 0) | |
1301 | pkt_dev->flags &= ~F_QUEUE_MAP_CPU; | |
1302 | #ifdef CONFIG_XFRM | |
1303 | else if (strcmp(f, "IPSEC") == 0) | |
1304 | pkt_dev->flags |= F_IPSEC_ON; | |
1305 | #endif | |
1306 | ||
1307 | else if (strcmp(f, "!IPV6") == 0) | |
1308 | pkt_dev->flags &= ~F_IPV6; | |
1309 | ||
1310 | else if (strcmp(f, "NODE_ALLOC") == 0) | |
1311 | pkt_dev->flags |= F_NODE; | |
1312 | ||
1313 | else if (strcmp(f, "!NODE_ALLOC") == 0) | |
1314 | pkt_dev->flags &= ~F_NODE; | |
1315 | ||
1316 | else if (strcmp(f, "UDPCSUM") == 0) | |
1317 | pkt_dev->flags |= F_UDPCSUM; | |
1318 | ||
1319 | else if (strcmp(f, "!UDPCSUM") == 0) | |
1320 | pkt_dev->flags &= ~F_UDPCSUM; | |
1321 | ||
1322 | else if (strcmp(f, "NO_TIMESTAMP") == 0) | |
1323 | pkt_dev->flags |= F_NO_TIMESTAMP; | |
1324 | ||
1325 | else if (strcmp(f, "!NO_TIMESTAMP") == 0) | |
1326 | pkt_dev->flags &= ~F_NO_TIMESTAMP; | |
1327 | ||
1328 | else { | |
1329 | sprintf(pg_result, | |
1330 | "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", | |
1331 | f, | |
1332 | "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " | |
1333 | "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, " | |
1334 | "MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, " | |
1335 | "QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, " | |
1336 | "NO_TIMESTAMP, " | |
1337 | #ifdef CONFIG_XFRM | |
1338 | "IPSEC, " | |
1339 | #endif | |
1340 | "NODE_ALLOC\n"); | |
1341 | return count; | |
1342 | } | |
1343 | sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); | |
1344 | return count; | |
1345 | } | |
1346 | if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { | |
1347 | len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); | |
1348 | if (len < 0) | |
1349 | return len; | |
1350 | ||
1351 | if (copy_from_user(buf, &user_buffer[i], len)) | |
1352 | return -EFAULT; | |
1353 | buf[len] = 0; | |
1354 | if (strcmp(buf, pkt_dev->dst_min) != 0) { | |
1355 | memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); | |
1356 | strncpy(pkt_dev->dst_min, buf, len); | |
1357 | pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); | |
1358 | pkt_dev->cur_daddr = pkt_dev->daddr_min; | |
1359 | } | |
1360 | if (debug) | |
1361 | pr_debug("dst_min set to: %s\n", pkt_dev->dst_min); | |
1362 | i += len; | |
1363 | sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); | |
1364 | return count; | |
1365 | } | |
1366 | if (!strcmp(name, "dst_max")) { | |
1367 | len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); | |
1368 | if (len < 0) | |
1369 | return len; | |
1370 | ||
1371 | ||
1372 | if (copy_from_user(buf, &user_buffer[i], len)) | |
1373 | return -EFAULT; | |
1374 | ||
1375 | buf[len] = 0; | |
1376 | if (strcmp(buf, pkt_dev->dst_max) != 0) { | |
1377 | memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); | |
1378 | strncpy(pkt_dev->dst_max, buf, len); | |
1379 | pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); | |
1380 | pkt_dev->cur_daddr = pkt_dev->daddr_max; | |
1381 | } | |
1382 | if (debug) | |
1383 | pr_debug("dst_max set to: %s\n", pkt_dev->dst_max); | |
1384 | i += len; | |
1385 | sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); | |
1386 | return count; | |
1387 | } | |
1388 | if (!strcmp(name, "dst6")) { | |
1389 | len = strn_len(&user_buffer[i], sizeof(buf) - 1); | |
1390 | if (len < 0) | |
1391 | return len; | |
1392 | ||
1393 | pkt_dev->flags |= F_IPV6; | |
1394 | ||
1395 | if (copy_from_user(buf, &user_buffer[i], len)) | |
1396 | return -EFAULT; | |
1397 | buf[len] = 0; | |
1398 | ||
1399 | in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL); | |
1400 | snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr); | |
1401 | ||
1402 | pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr; | |
1403 | ||
1404 | if (debug) | |
1405 | pr_debug("dst6 set to: %s\n", buf); | |
1406 | ||
1407 | i += len; | |
1408 | sprintf(pg_result, "OK: dst6=%s", buf); | |
1409 | return count; | |
1410 | } | |
1411 | if (!strcmp(name, "dst6_min")) { | |
1412 | len = strn_len(&user_buffer[i], sizeof(buf) - 1); | |
1413 | if (len < 0) | |
1414 | return len; | |
1415 | ||
1416 | pkt_dev->flags |= F_IPV6; | |
1417 | ||
1418 | if (copy_from_user(buf, &user_buffer[i], len)) | |
1419 | return -EFAULT; | |
1420 | buf[len] = 0; | |
1421 | ||
1422 | in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL); | |
1423 | snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr); | |
1424 | ||
1425 | pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr; | |
1426 | if (debug) | |
1427 | pr_debug("dst6_min set to: %s\n", buf); | |
1428 | ||
1429 | i += len; | |
1430 | sprintf(pg_result, "OK: dst6_min=%s", buf); | |
1431 | return count; | |
1432 | } | |
1433 | if (!strcmp(name, "dst6_max")) { | |
1434 | len = strn_len(&user_buffer[i], sizeof(buf) - 1); | |
1435 | if (len < 0) | |
1436 | return len; | |
1437 | ||
1438 | pkt_dev->flags |= F_IPV6; | |
1439 | ||
1440 | if (copy_from_user(buf, &user_buffer[i], len)) | |
1441 | return -EFAULT; | |
1442 | buf[len] = 0; | |
1443 | ||
1444 | in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL); | |
1445 | snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr); | |
1446 | ||
1447 | if (debug) | |
1448 | pr_debug("dst6_max set to: %s\n", buf); | |
1449 | ||
1450 | i += len; | |
1451 | sprintf(pg_result, "OK: dst6_max=%s", buf); | |
1452 | return count; | |
1453 | } | |
1454 | if (!strcmp(name, "src6")) { | |
1455 | len = strn_len(&user_buffer[i], sizeof(buf) - 1); | |
1456 | if (len < 0) | |
1457 | return len; | |
1458 | ||
1459 | pkt_dev->flags |= F_IPV6; | |
1460 | ||
1461 | if (copy_from_user(buf, &user_buffer[i], len)) | |
1462 | return -EFAULT; | |
1463 | buf[len] = 0; | |
1464 | ||
1465 | in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL); | |
1466 | snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr); | |
1467 | ||
1468 | pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr; | |
1469 | ||
1470 | if (debug) | |
1471 | pr_debug("src6 set to: %s\n", buf); | |
1472 | ||
1473 | i += len; | |
1474 | sprintf(pg_result, "OK: src6=%s", buf); | |
1475 | return count; | |
1476 | } | |
1477 | if (!strcmp(name, "src_min")) { | |
1478 | len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); | |
1479 | if (len < 0) | |
1480 | return len; | |
1481 | ||
1482 | if (copy_from_user(buf, &user_buffer[i], len)) | |
1483 | return -EFAULT; | |
1484 | buf[len] = 0; | |
1485 | if (strcmp(buf, pkt_dev->src_min) != 0) { | |
1486 | memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); | |
1487 | strncpy(pkt_dev->src_min, buf, len); | |
1488 | pkt_dev->saddr_min = in_aton(pkt_dev->src_min); | |
1489 | pkt_dev->cur_saddr = pkt_dev->saddr_min; | |
1490 | } | |
1491 | if (debug) | |
1492 | pr_debug("src_min set to: %s\n", pkt_dev->src_min); | |
1493 | i += len; | |
1494 | sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); | |
1495 | return count; | |
1496 | } | |
1497 | if (!strcmp(name, "src_max")) { | |
1498 | len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); | |
1499 | if (len < 0) | |
1500 | return len; | |
1501 | ||
1502 | if (copy_from_user(buf, &user_buffer[i], len)) | |
1503 | return -EFAULT; | |
1504 | buf[len] = 0; | |
1505 | if (strcmp(buf, pkt_dev->src_max) != 0) { | |
1506 | memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); | |
1507 | strncpy(pkt_dev->src_max, buf, len); | |
1508 | pkt_dev->saddr_max = in_aton(pkt_dev->src_max); | |
1509 | pkt_dev->cur_saddr = pkt_dev->saddr_max; | |
1510 | } | |
1511 | if (debug) | |
1512 | pr_debug("src_max set to: %s\n", pkt_dev->src_max); | |
1513 | i += len; | |
1514 | sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); | |
1515 | return count; | |
1516 | } | |
1517 | if (!strcmp(name, "dst_mac")) { | |
1518 | len = strn_len(&user_buffer[i], sizeof(valstr) - 1); | |
1519 | if (len < 0) | |
1520 | return len; | |
1521 | ||
1522 | memset(valstr, 0, sizeof(valstr)); | |
1523 | if (copy_from_user(valstr, &user_buffer[i], len)) | |
1524 | return -EFAULT; | |
1525 | ||
1526 | if (!mac_pton(valstr, pkt_dev->dst_mac)) | |
1527 | return -EINVAL; | |
1528 | /* Set up Dest MAC */ | |
1529 | ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac); | |
1530 | ||
1531 | sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac); | |
1532 | return count; | |
1533 | } | |
1534 | if (!strcmp(name, "src_mac")) { | |
1535 | len = strn_len(&user_buffer[i], sizeof(valstr) - 1); | |
1536 | if (len < 0) | |
1537 | return len; | |
1538 | ||
1539 | memset(valstr, 0, sizeof(valstr)); | |
1540 | if (copy_from_user(valstr, &user_buffer[i], len)) | |
1541 | return -EFAULT; | |
1542 | ||
1543 | if (!mac_pton(valstr, pkt_dev->src_mac)) | |
1544 | return -EINVAL; | |
1545 | /* Set up Src MAC */ | |
1546 | ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac); | |
1547 | ||
1548 | sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac); | |
1549 | return count; | |
1550 | } | |
1551 | ||
1552 | if (!strcmp(name, "clear_counters")) { | |
1553 | pktgen_clear_counters(pkt_dev); | |
1554 | sprintf(pg_result, "OK: Clearing counters.\n"); | |
1555 | return count; | |
1556 | } | |
1557 | ||
1558 | if (!strcmp(name, "flows")) { | |
1559 | len = num_arg(&user_buffer[i], 10, &value); | |
1560 | if (len < 0) | |
1561 | return len; | |
1562 | ||
1563 | i += len; | |
1564 | if (value > MAX_CFLOWS) | |
1565 | value = MAX_CFLOWS; | |
1566 | ||
1567 | pkt_dev->cflows = value; | |
1568 | sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); | |
1569 | return count; | |
1570 | } | |
1571 | #ifdef CONFIG_XFRM | |
1572 | if (!strcmp(name, "spi")) { | |
1573 | len = num_arg(&user_buffer[i], 10, &value); | |
1574 | if (len < 0) | |
1575 | return len; | |
1576 | ||
1577 | i += len; | |
1578 | pkt_dev->spi = value; | |
1579 | sprintf(pg_result, "OK: spi=%u", pkt_dev->spi); | |
1580 | return count; | |
1581 | } | |
1582 | #endif | |
1583 | if (!strcmp(name, "flowlen")) { | |
1584 | len = num_arg(&user_buffer[i], 10, &value); | |
1585 | if (len < 0) | |
1586 | return len; | |
1587 | ||
1588 | i += len; | |
1589 | pkt_dev->lflow = value; | |
1590 | sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); | |
1591 | return count; | |
1592 | } | |
1593 | ||
1594 | if (!strcmp(name, "queue_map_min")) { | |
1595 | len = num_arg(&user_buffer[i], 5, &value); | |
1596 | if (len < 0) | |
1597 | return len; | |
1598 | ||
1599 | i += len; | |
1600 | pkt_dev->queue_map_min = value; | |
1601 | sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); | |
1602 | return count; | |
1603 | } | |
1604 | ||
1605 | if (!strcmp(name, "queue_map_max")) { | |
1606 | len = num_arg(&user_buffer[i], 5, &value); | |
1607 | if (len < 0) | |
1608 | return len; | |
1609 | ||
1610 | i += len; | |
1611 | pkt_dev->queue_map_max = value; | |
1612 | sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); | |
1613 | return count; | |
1614 | } | |
1615 | ||
1616 | if (!strcmp(name, "mpls")) { | |
1617 | unsigned int n, cnt; | |
1618 | ||
1619 | len = get_labels(&user_buffer[i], pkt_dev); | |
1620 | if (len < 0) | |
1621 | return len; | |
1622 | i += len; | |
1623 | cnt = sprintf(pg_result, "OK: mpls="); | |
1624 | for (n = 0; n < pkt_dev->nr_labels; n++) | |
1625 | cnt += sprintf(pg_result + cnt, | |
1626 | "%08x%s", ntohl(pkt_dev->labels[n]), | |
1627 | n == pkt_dev->nr_labels-1 ? "" : ","); | |
1628 | ||
1629 | if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { | |
1630 | pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ | |
1631 | pkt_dev->svlan_id = 0xffff; | |
1632 | ||
1633 | if (debug) | |
1634 | pr_debug("VLAN/SVLAN auto turned off\n"); | |
1635 | } | |
1636 | return count; | |
1637 | } | |
1638 | ||
1639 | if (!strcmp(name, "vlan_id")) { | |
1640 | len = num_arg(&user_buffer[i], 4, &value); | |
1641 | if (len < 0) | |
1642 | return len; | |
1643 | ||
1644 | i += len; | |
1645 | if (value <= 4095) { | |
1646 | pkt_dev->vlan_id = value; /* turn on VLAN */ | |
1647 | ||
1648 | if (debug) | |
1649 | pr_debug("VLAN turned on\n"); | |
1650 | ||
1651 | if (debug && pkt_dev->nr_labels) | |
1652 | pr_debug("MPLS auto turned off\n"); | |
1653 | ||
1654 | pkt_dev->nr_labels = 0; /* turn off MPLS */ | |
1655 | sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); | |
1656 | } else { | |
1657 | pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ | |
1658 | pkt_dev->svlan_id = 0xffff; | |
1659 | ||
1660 | if (debug) | |
1661 | pr_debug("VLAN/SVLAN turned off\n"); | |
1662 | } | |
1663 | return count; | |
1664 | } | |
1665 | ||
1666 | if (!strcmp(name, "vlan_p")) { | |
1667 | len = num_arg(&user_buffer[i], 1, &value); | |
1668 | if (len < 0) | |
1669 | return len; | |
1670 | ||
1671 | i += len; | |
1672 | if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { | |
1673 | pkt_dev->vlan_p = value; | |
1674 | sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); | |
1675 | } else { | |
1676 | sprintf(pg_result, "ERROR: vlan_p must be 0-7"); | |
1677 | } | |
1678 | return count; | |
1679 | } | |
1680 | ||
1681 | if (!strcmp(name, "vlan_cfi")) { | |
1682 | len = num_arg(&user_buffer[i], 1, &value); | |
1683 | if (len < 0) | |
1684 | return len; | |
1685 | ||
1686 | i += len; | |
1687 | if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { | |
1688 | pkt_dev->vlan_cfi = value; | |
1689 | sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); | |
1690 | } else { | |
1691 | sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); | |
1692 | } | |
1693 | return count; | |
1694 | } | |
1695 | ||
1696 | if (!strcmp(name, "svlan_id")) { | |
1697 | len = num_arg(&user_buffer[i], 4, &value); | |
1698 | if (len < 0) | |
1699 | return len; | |
1700 | ||
1701 | i += len; | |
1702 | if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { | |
1703 | pkt_dev->svlan_id = value; /* turn on SVLAN */ | |
1704 | ||
1705 | if (debug) | |
1706 | pr_debug("SVLAN turned on\n"); | |
1707 | ||
1708 | if (debug && pkt_dev->nr_labels) | |
1709 | pr_debug("MPLS auto turned off\n"); | |
1710 | ||
1711 | pkt_dev->nr_labels = 0; /* turn off MPLS */ | |
1712 | sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); | |
1713 | } else { | |
1714 | pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ | |
1715 | pkt_dev->svlan_id = 0xffff; | |
1716 | ||
1717 | if (debug) | |
1718 | pr_debug("VLAN/SVLAN turned off\n"); | |
1719 | } | |
1720 | return count; | |
1721 | } | |
1722 | ||
1723 | if (!strcmp(name, "svlan_p")) { | |
1724 | len = num_arg(&user_buffer[i], 1, &value); | |
1725 | if (len < 0) | |
1726 | return len; | |
1727 | ||
1728 | i += len; | |
1729 | if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { | |
1730 | pkt_dev->svlan_p = value; | |
1731 | sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); | |
1732 | } else { | |
1733 | sprintf(pg_result, "ERROR: svlan_p must be 0-7"); | |
1734 | } | |
1735 | return count; | |
1736 | } | |
1737 | ||
1738 | if (!strcmp(name, "svlan_cfi")) { | |
1739 | len = num_arg(&user_buffer[i], 1, &value); | |
1740 | if (len < 0) | |
1741 | return len; | |
1742 | ||
1743 | i += len; | |
1744 | if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { | |
1745 | pkt_dev->svlan_cfi = value; | |
1746 | sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); | |
1747 | } else { | |
1748 | sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); | |
1749 | } | |
1750 | return count; | |
1751 | } | |
1752 | ||
1753 | if (!strcmp(name, "tos")) { | |
1754 | __u32 tmp_value = 0; | |
1755 | len = hex32_arg(&user_buffer[i], 2, &tmp_value); | |
1756 | if (len < 0) | |
1757 | return len; | |
1758 | ||
1759 | i += len; | |
1760 | if (len == 2) { | |
1761 | pkt_dev->tos = tmp_value; | |
1762 | sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); | |
1763 | } else { | |
1764 | sprintf(pg_result, "ERROR: tos must be 00-ff"); | |
1765 | } | |
1766 | return count; | |
1767 | } | |
1768 | ||
1769 | if (!strcmp(name, "traffic_class")) { | |
1770 | __u32 tmp_value = 0; | |
1771 | len = hex32_arg(&user_buffer[i], 2, &tmp_value); | |
1772 | if (len < 0) | |
1773 | return len; | |
1774 | ||
1775 | i += len; | |
1776 | if (len == 2) { | |
1777 | pkt_dev->traffic_class = tmp_value; | |
1778 | sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); | |
1779 | } else { | |
1780 | sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); | |
1781 | } | |
1782 | return count; | |
1783 | } | |
1784 | ||
1785 | if (!strcmp(name, "skb_priority")) { | |
1786 | len = num_arg(&user_buffer[i], 9, &value); | |
1787 | if (len < 0) | |
1788 | return len; | |
1789 | ||
1790 | i += len; | |
1791 | pkt_dev->skb_priority = value; | |
1792 | sprintf(pg_result, "OK: skb_priority=%i", | |
1793 | pkt_dev->skb_priority); | |
1794 | return count; | |
1795 | } | |
1796 | ||
1797 | sprintf(pkt_dev->result, "No such parameter \"%s\"", name); | |
1798 | return -EINVAL; | |
1799 | } | |
1800 | ||
1801 | static int pktgen_if_open(struct inode *inode, struct file *file) | |
1802 | { | |
1803 | return single_open(file, pktgen_if_show, PDE_DATA(inode)); | |
1804 | } | |
1805 | ||
1806 | static const struct file_operations pktgen_if_fops = { | |
1807 | .owner = THIS_MODULE, | |
1808 | .open = pktgen_if_open, | |
1809 | .read = seq_read, | |
1810 | .llseek = seq_lseek, | |
1811 | .write = pktgen_if_write, | |
1812 | .release = single_release, | |
1813 | }; | |
1814 | ||
1815 | static int pktgen_thread_show(struct seq_file *seq, void *v) | |
1816 | { | |
1817 | struct pktgen_thread *t = seq->private; | |
1818 | const struct pktgen_dev *pkt_dev; | |
1819 | ||
1820 | BUG_ON(!t); | |
1821 | ||
1822 | seq_puts(seq, "Running: "); | |
1823 | ||
1824 | rcu_read_lock(); | |
1825 | list_for_each_entry_rcu(pkt_dev, &t->if_list, list) | |
1826 | if (pkt_dev->running) | |
1827 | seq_printf(seq, "%s ", pkt_dev->odevname); | |
1828 | ||
1829 | seq_puts(seq, "\nStopped: "); | |
1830 | ||
1831 | list_for_each_entry_rcu(pkt_dev, &t->if_list, list) | |
1832 | if (!pkt_dev->running) | |
1833 | seq_printf(seq, "%s ", pkt_dev->odevname); | |
1834 | ||
1835 | if (t->result[0]) | |
1836 | seq_printf(seq, "\nResult: %s\n", t->result); | |
1837 | else | |
1838 | seq_puts(seq, "\nResult: NA\n"); | |
1839 | ||
1840 | rcu_read_unlock(); | |
1841 | ||
1842 | return 0; | |
1843 | } | |
1844 | ||
1845 | static ssize_t pktgen_thread_write(struct file *file, | |
1846 | const char __user * user_buffer, | |
1847 | size_t count, loff_t * offset) | |
1848 | { | |
1849 | struct seq_file *seq = file->private_data; | |
1850 | struct pktgen_thread *t = seq->private; | |
1851 | int i, max, len, ret; | |
1852 | char name[40]; | |
1853 | char *pg_result; | |
1854 | ||
1855 | if (count < 1) { | |
1856 | // sprintf(pg_result, "Wrong command format"); | |
1857 | return -EINVAL; | |
1858 | } | |
1859 | ||
1860 | max = count; | |
1861 | len = count_trail_chars(user_buffer, max); | |
1862 | if (len < 0) | |
1863 | return len; | |
1864 | ||
1865 | i = len; | |
1866 | ||
1867 | /* Read variable name */ | |
1868 | ||
1869 | len = strn_len(&user_buffer[i], sizeof(name) - 1); | |
1870 | if (len < 0) | |
1871 | return len; | |
1872 | ||
1873 | memset(name, 0, sizeof(name)); | |
1874 | if (copy_from_user(name, &user_buffer[i], len)) | |
1875 | return -EFAULT; | |
1876 | i += len; | |
1877 | ||
1878 | max = count - i; | |
1879 | len = count_trail_chars(&user_buffer[i], max); | |
1880 | if (len < 0) | |
1881 | return len; | |
1882 | ||
1883 | i += len; | |
1884 | ||
1885 | if (debug) | |
1886 | pr_debug("t=%s, count=%lu\n", name, (unsigned long)count); | |
1887 | ||
1888 | if (!t) { | |
1889 | pr_err("ERROR: No thread\n"); | |
1890 | ret = -EINVAL; | |
1891 | goto out; | |
1892 | } | |
1893 | ||
1894 | pg_result = &(t->result[0]); | |
1895 | ||
1896 | if (!strcmp(name, "add_device")) { | |
1897 | char f[32]; | |
1898 | memset(f, 0, 32); | |
1899 | len = strn_len(&user_buffer[i], sizeof(f) - 1); | |
1900 | if (len < 0) { | |
1901 | ret = len; | |
1902 | goto out; | |
1903 | } | |
1904 | if (copy_from_user(f, &user_buffer[i], len)) | |
1905 | return -EFAULT; | |
1906 | i += len; | |
1907 | mutex_lock(&pktgen_thread_lock); | |
1908 | ret = pktgen_add_device(t, f); | |
1909 | mutex_unlock(&pktgen_thread_lock); | |
1910 | if (!ret) { | |
1911 | ret = count; | |
1912 | sprintf(pg_result, "OK: add_device=%s", f); | |
1913 | } else | |
1914 | sprintf(pg_result, "ERROR: can not add device %s", f); | |
1915 | goto out; | |
1916 | } | |
1917 | ||
1918 | if (!strcmp(name, "rem_device_all")) { | |
1919 | mutex_lock(&pktgen_thread_lock); | |
1920 | t->control |= T_REMDEVALL; | |
1921 | mutex_unlock(&pktgen_thread_lock); | |
1922 | schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ | |
1923 | ret = count; | |
1924 | sprintf(pg_result, "OK: rem_device_all"); | |
1925 | goto out; | |
1926 | } | |
1927 | ||
1928 | if (!strcmp(name, "max_before_softirq")) { | |
1929 | sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); | |
1930 | ret = count; | |
1931 | goto out; | |
1932 | } | |
1933 | ||
1934 | ret = -EINVAL; | |
1935 | out: | |
1936 | return ret; | |
1937 | } | |
1938 | ||
1939 | static int pktgen_thread_open(struct inode *inode, struct file *file) | |
1940 | { | |
1941 | return single_open(file, pktgen_thread_show, PDE_DATA(inode)); | |
1942 | } | |
1943 | ||
1944 | static const struct file_operations pktgen_thread_fops = { | |
1945 | .owner = THIS_MODULE, | |
1946 | .open = pktgen_thread_open, | |
1947 | .read = seq_read, | |
1948 | .llseek = seq_lseek, | |
1949 | .write = pktgen_thread_write, | |
1950 | .release = single_release, | |
1951 | }; | |
1952 | ||
1953 | /* Think find or remove for NN */ | |
1954 | static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn, | |
1955 | const char *ifname, int remove) | |
1956 | { | |
1957 | struct pktgen_thread *t; | |
1958 | struct pktgen_dev *pkt_dev = NULL; | |
1959 | bool exact = (remove == FIND); | |
1960 | ||
1961 | list_for_each_entry(t, &pn->pktgen_threads, th_list) { | |
1962 | pkt_dev = pktgen_find_dev(t, ifname, exact); | |
1963 | if (pkt_dev) { | |
1964 | if (remove) { | |
1965 | pkt_dev->removal_mark = 1; | |
1966 | t->control |= T_REMDEV; | |
1967 | } | |
1968 | break; | |
1969 | } | |
1970 | } | |
1971 | return pkt_dev; | |
1972 | } | |
1973 | ||
1974 | /* | |
1975 | * mark a device for removal | |
1976 | */ | |
1977 | static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname) | |
1978 | { | |
1979 | struct pktgen_dev *pkt_dev = NULL; | |
1980 | const int max_tries = 10, msec_per_try = 125; | |
1981 | int i = 0; | |
1982 | ||
1983 | mutex_lock(&pktgen_thread_lock); | |
1984 | pr_debug("%s: marking %s for removal\n", __func__, ifname); | |
1985 | ||
1986 | while (1) { | |
1987 | ||
1988 | pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE); | |
1989 | if (pkt_dev == NULL) | |
1990 | break; /* success */ | |
1991 | ||
1992 | mutex_unlock(&pktgen_thread_lock); | |
1993 | pr_debug("%s: waiting for %s to disappear....\n", | |
1994 | __func__, ifname); | |
1995 | schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); | |
1996 | mutex_lock(&pktgen_thread_lock); | |
1997 | ||
1998 | if (++i >= max_tries) { | |
1999 | pr_err("%s: timed out after waiting %d msec for device %s to be removed\n", | |
2000 | __func__, msec_per_try * i, ifname); | |
2001 | break; | |
2002 | } | |
2003 | ||
2004 | } | |
2005 | ||
2006 | mutex_unlock(&pktgen_thread_lock); | |
2007 | } | |
2008 | ||
2009 | static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev) | |
2010 | { | |
2011 | struct pktgen_thread *t; | |
2012 | ||
2013 | mutex_lock(&pktgen_thread_lock); | |
2014 | ||
2015 | list_for_each_entry(t, &pn->pktgen_threads, th_list) { | |
2016 | struct pktgen_dev *pkt_dev; | |
2017 | ||
2018 | if_lock(t); | |
2019 | list_for_each_entry(pkt_dev, &t->if_list, list) { | |
2020 | if (pkt_dev->odev != dev) | |
2021 | continue; | |
2022 | ||
2023 | proc_remove(pkt_dev->entry); | |
2024 | ||
2025 | pkt_dev->entry = proc_create_data(dev->name, 0600, | |
2026 | pn->proc_dir, | |
2027 | &pktgen_if_fops, | |
2028 | pkt_dev); | |
2029 | if (!pkt_dev->entry) | |
2030 | pr_err("can't move proc entry for '%s'\n", | |
2031 | dev->name); | |
2032 | break; | |
2033 | } | |
2034 | if_unlock(t); | |
2035 | } | |
2036 | mutex_unlock(&pktgen_thread_lock); | |
2037 | } | |
2038 | ||
2039 | static int pktgen_device_event(struct notifier_block *unused, | |
2040 | unsigned long event, void *ptr) | |
2041 | { | |
2042 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
2043 | struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id); | |
2044 | ||
2045 | if (pn->pktgen_exiting) | |
2046 | return NOTIFY_DONE; | |
2047 | ||
2048 | /* It is OK that we do not hold the group lock right now, | |
2049 | * as we run under the RTNL lock. | |
2050 | */ | |
2051 | ||
2052 | switch (event) { | |
2053 | case NETDEV_CHANGENAME: | |
2054 | pktgen_change_name(pn, dev); | |
2055 | break; | |
2056 | ||
2057 | case NETDEV_UNREGISTER: | |
2058 | pktgen_mark_device(pn, dev->name); | |
2059 | break; | |
2060 | } | |
2061 | ||
2062 | return NOTIFY_DONE; | |
2063 | } | |
2064 | ||
2065 | static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn, | |
2066 | struct pktgen_dev *pkt_dev, | |
2067 | const char *ifname) | |
2068 | { | |
2069 | char b[IFNAMSIZ+5]; | |
2070 | int i; | |
2071 | ||
2072 | for (i = 0; ifname[i] != '@'; i++) { | |
2073 | if (i == IFNAMSIZ) | |
2074 | break; | |
2075 | ||
2076 | b[i] = ifname[i]; | |
2077 | } | |
2078 | b[i] = 0; | |
2079 | ||
2080 | return dev_get_by_name(pn->net, b); | |
2081 | } | |
2082 | ||
2083 | ||
2084 | /* Associate pktgen_dev with a device. */ | |
2085 | ||
2086 | static int pktgen_setup_dev(const struct pktgen_net *pn, | |
2087 | struct pktgen_dev *pkt_dev, const char *ifname) | |
2088 | { | |
2089 | struct net_device *odev; | |
2090 | int err; | |
2091 | ||
2092 | /* Clean old setups */ | |
2093 | if (pkt_dev->odev) { | |
2094 | dev_put(pkt_dev->odev); | |
2095 | pkt_dev->odev = NULL; | |
2096 | } | |
2097 | ||
2098 | odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname); | |
2099 | if (!odev) { | |
2100 | pr_err("no such netdevice: \"%s\"\n", ifname); | |
2101 | return -ENODEV; | |
2102 | } | |
2103 | ||
2104 | if (odev->type != ARPHRD_ETHER) { | |
2105 | pr_err("not an ethernet device: \"%s\"\n", ifname); | |
2106 | err = -EINVAL; | |
2107 | } else if (!netif_running(odev)) { | |
2108 | pr_err("device is down: \"%s\"\n", ifname); | |
2109 | err = -ENETDOWN; | |
2110 | } else { | |
2111 | pkt_dev->odev = odev; | |
2112 | return 0; | |
2113 | } | |
2114 | ||
2115 | dev_put(odev); | |
2116 | return err; | |
2117 | } | |
2118 | ||
2119 | /* Read pkt_dev from the interface and set up internal pktgen_dev | |
2120 | * structure to have the right information to create/send packets | |
2121 | */ | |
2122 | static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) | |
2123 | { | |
2124 | int ntxq; | |
2125 | ||
2126 | if (!pkt_dev->odev) { | |
2127 | pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n"); | |
2128 | sprintf(pkt_dev->result, | |
2129 | "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); | |
2130 | return; | |
2131 | } | |
2132 | ||
2133 | /* make sure that we don't pick a non-existing transmit queue */ | |
2134 | ntxq = pkt_dev->odev->real_num_tx_queues; | |
2135 | ||
2136 | if (ntxq <= pkt_dev->queue_map_min) { | |
2137 | pr_warn("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", | |
2138 | pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, | |
2139 | pkt_dev->odevname); | |
2140 | pkt_dev->queue_map_min = (ntxq ?: 1) - 1; | |
2141 | } | |
2142 | if (pkt_dev->queue_map_max >= ntxq) { | |
2143 | pr_warn("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", | |
2144 | pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, | |
2145 | pkt_dev->odevname); | |
2146 | pkt_dev->queue_map_max = (ntxq ?: 1) - 1; | |
2147 | } | |
2148 | ||
2149 | /* Default to the interface's mac if not explicitly set. */ | |
2150 | ||
2151 | if (is_zero_ether_addr(pkt_dev->src_mac)) | |
2152 | ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr); | |
2153 | ||
2154 | /* Set up Dest MAC */ | |
2155 | ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac); | |
2156 | ||
2157 | if (pkt_dev->flags & F_IPV6) { | |
2158 | int i, set = 0, err = 1; | |
2159 | struct inet6_dev *idev; | |
2160 | ||
2161 | if (pkt_dev->min_pkt_size == 0) { | |
2162 | pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr) | |
2163 | + sizeof(struct udphdr) | |
2164 | + sizeof(struct pktgen_hdr) | |
2165 | + pkt_dev->pkt_overhead; | |
2166 | } | |
2167 | ||
2168 | for (i = 0; i < IN6_ADDR_HSIZE; i++) | |
2169 | if (pkt_dev->cur_in6_saddr.s6_addr[i]) { | |
2170 | set = 1; | |
2171 | break; | |
2172 | } | |
2173 | ||
2174 | if (!set) { | |
2175 | ||
2176 | /* | |
2177 | * Use linklevel address if unconfigured. | |
2178 | * | |
2179 | * use ipv6_get_lladdr if/when it's get exported | |
2180 | */ | |
2181 | ||
2182 | rcu_read_lock(); | |
2183 | idev = __in6_dev_get(pkt_dev->odev); | |
2184 | if (idev) { | |
2185 | struct inet6_ifaddr *ifp; | |
2186 | ||
2187 | read_lock_bh(&idev->lock); | |
2188 | list_for_each_entry(ifp, &idev->addr_list, if_list) { | |
2189 | if ((ifp->scope & IFA_LINK) && | |
2190 | !(ifp->flags & IFA_F_TENTATIVE)) { | |
2191 | pkt_dev->cur_in6_saddr = ifp->addr; | |
2192 | err = 0; | |
2193 | break; | |
2194 | } | |
2195 | } | |
2196 | read_unlock_bh(&idev->lock); | |
2197 | } | |
2198 | rcu_read_unlock(); | |
2199 | if (err) | |
2200 | pr_err("ERROR: IPv6 link address not available\n"); | |
2201 | } | |
2202 | } else { | |
2203 | if (pkt_dev->min_pkt_size == 0) { | |
2204 | pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr) | |
2205 | + sizeof(struct udphdr) | |
2206 | + sizeof(struct pktgen_hdr) | |
2207 | + pkt_dev->pkt_overhead; | |
2208 | } | |
2209 | ||
2210 | pkt_dev->saddr_min = 0; | |
2211 | pkt_dev->saddr_max = 0; | |
2212 | if (strlen(pkt_dev->src_min) == 0) { | |
2213 | ||
2214 | struct in_device *in_dev; | |
2215 | ||
2216 | rcu_read_lock(); | |
2217 | in_dev = __in_dev_get_rcu(pkt_dev->odev); | |
2218 | if (in_dev) { | |
2219 | if (in_dev->ifa_list) { | |
2220 | pkt_dev->saddr_min = | |
2221 | in_dev->ifa_list->ifa_address; | |
2222 | pkt_dev->saddr_max = pkt_dev->saddr_min; | |
2223 | } | |
2224 | } | |
2225 | rcu_read_unlock(); | |
2226 | } else { | |
2227 | pkt_dev->saddr_min = in_aton(pkt_dev->src_min); | |
2228 | pkt_dev->saddr_max = in_aton(pkt_dev->src_max); | |
2229 | } | |
2230 | ||
2231 | pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); | |
2232 | pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); | |
2233 | } | |
2234 | /* Initialize current values. */ | |
2235 | pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; | |
2236 | if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size) | |
2237 | pkt_dev->max_pkt_size = pkt_dev->min_pkt_size; | |
2238 | ||
2239 | pkt_dev->cur_dst_mac_offset = 0; | |
2240 | pkt_dev->cur_src_mac_offset = 0; | |
2241 | pkt_dev->cur_saddr = pkt_dev->saddr_min; | |
2242 | pkt_dev->cur_daddr = pkt_dev->daddr_min; | |
2243 | pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; | |
2244 | pkt_dev->cur_udp_src = pkt_dev->udp_src_min; | |
2245 | pkt_dev->nflows = 0; | |
2246 | } | |
2247 | ||
2248 | ||
2249 | static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) | |
2250 | { | |
2251 | ktime_t start_time, end_time; | |
2252 | s64 remaining; | |
2253 | struct hrtimer_sleeper t; | |
2254 | ||
2255 | hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); | |
2256 | hrtimer_set_expires(&t.timer, spin_until); | |
2257 | ||
2258 | remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer)); | |
2259 | if (remaining <= 0) | |
2260 | goto out; | |
2261 | ||
2262 | start_time = ktime_get(); | |
2263 | if (remaining < 100000) { | |
2264 | /* for small delays (<100us), just loop until limit is reached */ | |
2265 | do { | |
2266 | end_time = ktime_get(); | |
2267 | } while (ktime_compare(end_time, spin_until) < 0); | |
2268 | } else { | |
2269 | /* see do_nanosleep */ | |
2270 | hrtimer_init_sleeper(&t, current); | |
2271 | do { | |
2272 | set_current_state(TASK_INTERRUPTIBLE); | |
2273 | hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS); | |
2274 | ||
2275 | if (likely(t.task)) | |
2276 | schedule(); | |
2277 | ||
2278 | hrtimer_cancel(&t.timer); | |
2279 | } while (t.task && pkt_dev->running && !signal_pending(current)); | |
2280 | __set_current_state(TASK_RUNNING); | |
2281 | end_time = ktime_get(); | |
2282 | } | |
2283 | ||
2284 | pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); | |
2285 | out: | |
2286 | pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); | |
2287 | destroy_hrtimer_on_stack(&t.timer); | |
2288 | } | |
2289 | ||
2290 | static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) | |
2291 | { | |
2292 | pkt_dev->pkt_overhead = 0; | |
2293 | pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); | |
2294 | pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); | |
2295 | pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); | |
2296 | } | |
2297 | ||
2298 | static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) | |
2299 | { | |
2300 | return !!(pkt_dev->flows[flow].flags & F_INIT); | |
2301 | } | |
2302 | ||
2303 | static inline int f_pick(struct pktgen_dev *pkt_dev) | |
2304 | { | |
2305 | int flow = pkt_dev->curfl; | |
2306 | ||
2307 | if (pkt_dev->flags & F_FLOW_SEQ) { | |
2308 | if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { | |
2309 | /* reset time */ | |
2310 | pkt_dev->flows[flow].count = 0; | |
2311 | pkt_dev->flows[flow].flags = 0; | |
2312 | pkt_dev->curfl += 1; | |
2313 | if (pkt_dev->curfl >= pkt_dev->cflows) | |
2314 | pkt_dev->curfl = 0; /*reset */ | |
2315 | } | |
2316 | } else { | |
2317 | flow = prandom_u32() % pkt_dev->cflows; | |
2318 | pkt_dev->curfl = flow; | |
2319 | ||
2320 | if (pkt_dev->flows[flow].count > pkt_dev->lflow) { | |
2321 | pkt_dev->flows[flow].count = 0; | |
2322 | pkt_dev->flows[flow].flags = 0; | |
2323 | } | |
2324 | } | |
2325 | ||
2326 | return pkt_dev->curfl; | |
2327 | } | |
2328 | ||
2329 | ||
2330 | #ifdef CONFIG_XFRM | |
2331 | /* If there was already an IPSEC SA, we keep it as is, else | |
2332 | * we go look for it ... | |
2333 | */ | |
2334 | #define DUMMY_MARK 0 | |
2335 | static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) | |
2336 | { | |
2337 | struct xfrm_state *x = pkt_dev->flows[flow].x; | |
2338 | struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id); | |
2339 | if (!x) { | |
2340 | ||
2341 | if (pkt_dev->spi) { | |
2342 | /* We need as quick as possible to find the right SA | |
2343 | * Searching with minimum criteria to archieve this. | |
2344 | */ | |
2345 | x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET); | |
2346 | } else { | |
2347 | /* slow path: we dont already have xfrm_state */ | |
2348 | x = xfrm_stateonly_find(pn->net, DUMMY_MARK, | |
2349 | (xfrm_address_t *)&pkt_dev->cur_daddr, | |
2350 | (xfrm_address_t *)&pkt_dev->cur_saddr, | |
2351 | AF_INET, | |
2352 | pkt_dev->ipsmode, | |
2353 | pkt_dev->ipsproto, 0); | |
2354 | } | |
2355 | if (x) { | |
2356 | pkt_dev->flows[flow].x = x; | |
2357 | set_pkt_overhead(pkt_dev); | |
2358 | pkt_dev->pkt_overhead += x->props.header_len; | |
2359 | } | |
2360 | ||
2361 | } | |
2362 | } | |
2363 | #endif | |
2364 | static void set_cur_queue_map(struct pktgen_dev *pkt_dev) | |
2365 | { | |
2366 | ||
2367 | if (pkt_dev->flags & F_QUEUE_MAP_CPU) | |
2368 | pkt_dev->cur_queue_map = smp_processor_id(); | |
2369 | ||
2370 | else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { | |
2371 | __u16 t; | |
2372 | if (pkt_dev->flags & F_QUEUE_MAP_RND) { | |
2373 | t = prandom_u32() % | |
2374 | (pkt_dev->queue_map_max - | |
2375 | pkt_dev->queue_map_min + 1) | |
2376 | + pkt_dev->queue_map_min; | |
2377 | } else { | |
2378 | t = pkt_dev->cur_queue_map + 1; | |
2379 | if (t > pkt_dev->queue_map_max) | |
2380 | t = pkt_dev->queue_map_min; | |
2381 | } | |
2382 | pkt_dev->cur_queue_map = t; | |
2383 | } | |
2384 | pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; | |
2385 | } | |
2386 | ||
2387 | /* Increment/randomize headers according to flags and current values | |
2388 | * for IP src/dest, UDP src/dst port, MAC-Addr src/dst | |
2389 | */ | |
2390 | static void mod_cur_headers(struct pktgen_dev *pkt_dev) | |
2391 | { | |
2392 | __u32 imn; | |
2393 | __u32 imx; | |
2394 | int flow = 0; | |
2395 | ||
2396 | if (pkt_dev->cflows) | |
2397 | flow = f_pick(pkt_dev); | |
2398 | ||
2399 | /* Deal with source MAC */ | |
2400 | if (pkt_dev->src_mac_count > 1) { | |
2401 | __u32 mc; | |
2402 | __u32 tmp; | |
2403 | ||
2404 | if (pkt_dev->flags & F_MACSRC_RND) | |
2405 | mc = prandom_u32() % pkt_dev->src_mac_count; | |
2406 | else { | |
2407 | mc = pkt_dev->cur_src_mac_offset++; | |
2408 | if (pkt_dev->cur_src_mac_offset >= | |
2409 | pkt_dev->src_mac_count) | |
2410 | pkt_dev->cur_src_mac_offset = 0; | |
2411 | } | |
2412 | ||
2413 | tmp = pkt_dev->src_mac[5] + (mc & 0xFF); | |
2414 | pkt_dev->hh[11] = tmp; | |
2415 | tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); | |
2416 | pkt_dev->hh[10] = tmp; | |
2417 | tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); | |
2418 | pkt_dev->hh[9] = tmp; | |
2419 | tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); | |
2420 | pkt_dev->hh[8] = tmp; | |
2421 | tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); | |
2422 | pkt_dev->hh[7] = tmp; | |
2423 | } | |
2424 | ||
2425 | /* Deal with Destination MAC */ | |
2426 | if (pkt_dev->dst_mac_count > 1) { | |
2427 | __u32 mc; | |
2428 | __u32 tmp; | |
2429 | ||
2430 | if (pkt_dev->flags & F_MACDST_RND) | |
2431 | mc = prandom_u32() % pkt_dev->dst_mac_count; | |
2432 | ||
2433 | else { | |
2434 | mc = pkt_dev->cur_dst_mac_offset++; | |
2435 | if (pkt_dev->cur_dst_mac_offset >= | |
2436 | pkt_dev->dst_mac_count) { | |
2437 | pkt_dev->cur_dst_mac_offset = 0; | |
2438 | } | |
2439 | } | |
2440 | ||
2441 | tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); | |
2442 | pkt_dev->hh[5] = tmp; | |
2443 | tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); | |
2444 | pkt_dev->hh[4] = tmp; | |
2445 | tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); | |
2446 | pkt_dev->hh[3] = tmp; | |
2447 | tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); | |
2448 | pkt_dev->hh[2] = tmp; | |
2449 | tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); | |
2450 | pkt_dev->hh[1] = tmp; | |
2451 | } | |
2452 | ||
2453 | if (pkt_dev->flags & F_MPLS_RND) { | |
2454 | unsigned int i; | |
2455 | for (i = 0; i < pkt_dev->nr_labels; i++) | |
2456 | if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) | |
2457 | pkt_dev->labels[i] = MPLS_STACK_BOTTOM | | |
2458 | ((__force __be32)prandom_u32() & | |
2459 | htonl(0x000fffff)); | |
2460 | } | |
2461 | ||
2462 | if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { | |
2463 | pkt_dev->vlan_id = prandom_u32() & (4096 - 1); | |
2464 | } | |
2465 | ||
2466 | if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { | |
2467 | pkt_dev->svlan_id = prandom_u32() & (4096 - 1); | |
2468 | } | |
2469 | ||
2470 | if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { | |
2471 | if (pkt_dev->flags & F_UDPSRC_RND) | |
2472 | pkt_dev->cur_udp_src = prandom_u32() % | |
2473 | (pkt_dev->udp_src_max - pkt_dev->udp_src_min) | |
2474 | + pkt_dev->udp_src_min; | |
2475 | ||
2476 | else { | |
2477 | pkt_dev->cur_udp_src++; | |
2478 | if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) | |
2479 | pkt_dev->cur_udp_src = pkt_dev->udp_src_min; | |
2480 | } | |
2481 | } | |
2482 | ||
2483 | if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { | |
2484 | if (pkt_dev->flags & F_UDPDST_RND) { | |
2485 | pkt_dev->cur_udp_dst = prandom_u32() % | |
2486 | (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) | |
2487 | + pkt_dev->udp_dst_min; | |
2488 | } else { | |
2489 | pkt_dev->cur_udp_dst++; | |
2490 | if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) | |
2491 | pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; | |
2492 | } | |
2493 | } | |
2494 | ||
2495 | if (!(pkt_dev->flags & F_IPV6)) { | |
2496 | ||
2497 | imn = ntohl(pkt_dev->saddr_min); | |
2498 | imx = ntohl(pkt_dev->saddr_max); | |
2499 | if (imn < imx) { | |
2500 | __u32 t; | |
2501 | if (pkt_dev->flags & F_IPSRC_RND) | |
2502 | t = prandom_u32() % (imx - imn) + imn; | |
2503 | else { | |
2504 | t = ntohl(pkt_dev->cur_saddr); | |
2505 | t++; | |
2506 | if (t > imx) | |
2507 | t = imn; | |
2508 | ||
2509 | } | |
2510 | pkt_dev->cur_saddr = htonl(t); | |
2511 | } | |
2512 | ||
2513 | if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { | |
2514 | pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; | |
2515 | } else { | |
2516 | imn = ntohl(pkt_dev->daddr_min); | |
2517 | imx = ntohl(pkt_dev->daddr_max); | |
2518 | if (imn < imx) { | |
2519 | __u32 t; | |
2520 | __be32 s; | |
2521 | if (pkt_dev->flags & F_IPDST_RND) { | |
2522 | ||
2523 | do { | |
2524 | t = prandom_u32() % | |
2525 | (imx - imn) + imn; | |
2526 | s = htonl(t); | |
2527 | } while (ipv4_is_loopback(s) || | |
2528 | ipv4_is_multicast(s) || | |
2529 | ipv4_is_lbcast(s) || | |
2530 | ipv4_is_zeronet(s) || | |
2531 | ipv4_is_local_multicast(s)); | |
2532 | pkt_dev->cur_daddr = s; | |
2533 | } else { | |
2534 | t = ntohl(pkt_dev->cur_daddr); | |
2535 | t++; | |
2536 | if (t > imx) { | |
2537 | t = imn; | |
2538 | } | |
2539 | pkt_dev->cur_daddr = htonl(t); | |
2540 | } | |
2541 | } | |
2542 | if (pkt_dev->cflows) { | |
2543 | pkt_dev->flows[flow].flags |= F_INIT; | |
2544 | pkt_dev->flows[flow].cur_daddr = | |
2545 | pkt_dev->cur_daddr; | |
2546 | #ifdef CONFIG_XFRM | |
2547 | if (pkt_dev->flags & F_IPSEC_ON) | |
2548 | get_ipsec_sa(pkt_dev, flow); | |
2549 | #endif | |
2550 | pkt_dev->nflows++; | |
2551 | } | |
2552 | } | |
2553 | } else { /* IPV6 * */ | |
2554 | ||
2555 | if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) { | |
2556 | int i; | |
2557 | ||
2558 | /* Only random destinations yet */ | |
2559 | ||
2560 | for (i = 0; i < 4; i++) { | |
2561 | pkt_dev->cur_in6_daddr.s6_addr32[i] = | |
2562 | (((__force __be32)prandom_u32() | | |
2563 | pkt_dev->min_in6_daddr.s6_addr32[i]) & | |
2564 | pkt_dev->max_in6_daddr.s6_addr32[i]); | |
2565 | } | |
2566 | } | |
2567 | } | |
2568 | ||
2569 | if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { | |
2570 | __u32 t; | |
2571 | if (pkt_dev->flags & F_TXSIZE_RND) { | |
2572 | t = prandom_u32() % | |
2573 | (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) | |
2574 | + pkt_dev->min_pkt_size; | |
2575 | } else { | |
2576 | t = pkt_dev->cur_pkt_size + 1; | |
2577 | if (t > pkt_dev->max_pkt_size) | |
2578 | t = pkt_dev->min_pkt_size; | |
2579 | } | |
2580 | pkt_dev->cur_pkt_size = t; | |
2581 | } | |
2582 | ||
2583 | set_cur_queue_map(pkt_dev); | |
2584 | ||
2585 | pkt_dev->flows[flow].count++; | |
2586 | } | |
2587 | ||
2588 | ||
2589 | #ifdef CONFIG_XFRM | |
2590 | static u32 pktgen_dst_metrics[RTAX_MAX + 1] = { | |
2591 | ||
2592 | [RTAX_HOPLIMIT] = 0x5, /* Set a static hoplimit */ | |
2593 | }; | |
2594 | ||
2595 | static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) | |
2596 | { | |
2597 | struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; | |
2598 | int err = 0; | |
2599 | struct net *net = dev_net(pkt_dev->odev); | |
2600 | ||
2601 | if (!x) | |
2602 | return 0; | |
2603 | /* XXX: we dont support tunnel mode for now until | |
2604 | * we resolve the dst issue */ | |
2605 | if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0)) | |
2606 | return 0; | |
2607 | ||
2608 | /* But when user specify an valid SPI, transformation | |
2609 | * supports both transport/tunnel mode + ESP/AH type. | |
2610 | */ | |
2611 | if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0)) | |
2612 | skb->_skb_refdst = (unsigned long)&pkt_dev->dst | SKB_DST_NOREF; | |
2613 | ||
2614 | rcu_read_lock_bh(); | |
2615 | err = x->outer_mode->output(x, skb); | |
2616 | rcu_read_unlock_bh(); | |
2617 | if (err) { | |
2618 | XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR); | |
2619 | goto error; | |
2620 | } | |
2621 | err = x->type->output(x, skb); | |
2622 | if (err) { | |
2623 | XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR); | |
2624 | goto error; | |
2625 | } | |
2626 | spin_lock_bh(&x->lock); | |
2627 | x->curlft.bytes += skb->len; | |
2628 | x->curlft.packets++; | |
2629 | spin_unlock_bh(&x->lock); | |
2630 | error: | |
2631 | return err; | |
2632 | } | |
2633 | ||
2634 | static void free_SAs(struct pktgen_dev *pkt_dev) | |
2635 | { | |
2636 | if (pkt_dev->cflows) { | |
2637 | /* let go of the SAs if we have them */ | |
2638 | int i; | |
2639 | for (i = 0; i < pkt_dev->cflows; i++) { | |
2640 | struct xfrm_state *x = pkt_dev->flows[i].x; | |
2641 | if (x) { | |
2642 | xfrm_state_put(x); | |
2643 | pkt_dev->flows[i].x = NULL; | |
2644 | } | |
2645 | } | |
2646 | } | |
2647 | } | |
2648 | ||
2649 | static int process_ipsec(struct pktgen_dev *pkt_dev, | |
2650 | struct sk_buff *skb, __be16 protocol) | |
2651 | { | |
2652 | if (pkt_dev->flags & F_IPSEC_ON) { | |
2653 | struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; | |
2654 | int nhead = 0; | |
2655 | if (x) { | |
2656 | struct ethhdr *eth; | |
2657 | struct iphdr *iph; | |
2658 | int ret; | |
2659 | ||
2660 | nhead = x->props.header_len - skb_headroom(skb); | |
2661 | if (nhead > 0) { | |
2662 | ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); | |
2663 | if (ret < 0) { | |
2664 | pr_err("Error expanding ipsec packet %d\n", | |
2665 | ret); | |
2666 | goto err; | |
2667 | } | |
2668 | } | |
2669 | ||
2670 | /* ipsec is not expecting ll header */ | |
2671 | skb_pull(skb, ETH_HLEN); | |
2672 | ret = pktgen_output_ipsec(skb, pkt_dev); | |
2673 | if (ret) { | |
2674 | pr_err("Error creating ipsec packet %d\n", ret); | |
2675 | goto err; | |
2676 | } | |
2677 | /* restore ll */ | |
2678 | eth = skb_push(skb, ETH_HLEN); | |
2679 | memcpy(eth, pkt_dev->hh, 2 * ETH_ALEN); | |
2680 | eth->h_proto = protocol; | |
2681 | ||
2682 | /* Update IPv4 header len as well as checksum value */ | |
2683 | iph = ip_hdr(skb); | |
2684 | iph->tot_len = htons(skb->len - ETH_HLEN); | |
2685 | ip_send_check(iph); | |
2686 | } | |
2687 | } | |
2688 | return 1; | |
2689 | err: | |
2690 | kfree_skb(skb); | |
2691 | return 0; | |
2692 | } | |
2693 | #endif | |
2694 | ||
2695 | static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) | |
2696 | { | |
2697 | unsigned int i; | |
2698 | for (i = 0; i < pkt_dev->nr_labels; i++) | |
2699 | *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; | |
2700 | ||
2701 | mpls--; | |
2702 | *mpls |= MPLS_STACK_BOTTOM; | |
2703 | } | |
2704 | ||
2705 | static inline __be16 build_tci(unsigned int id, unsigned int cfi, | |
2706 | unsigned int prio) | |
2707 | { | |
2708 | return htons(id | (cfi << 12) | (prio << 13)); | |
2709 | } | |
2710 | ||
2711 | static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb, | |
2712 | int datalen) | |
2713 | { | |
2714 | struct timeval timestamp; | |
2715 | struct pktgen_hdr *pgh; | |
2716 | ||
2717 | pgh = skb_put(skb, sizeof(*pgh)); | |
2718 | datalen -= sizeof(*pgh); | |
2719 | ||
2720 | if (pkt_dev->nfrags <= 0) { | |
2721 | skb_put_zero(skb, datalen); | |
2722 | } else { | |
2723 | int frags = pkt_dev->nfrags; | |
2724 | int i, len; | |
2725 | int frag_len; | |
2726 | ||
2727 | ||
2728 | if (frags > MAX_SKB_FRAGS) | |
2729 | frags = MAX_SKB_FRAGS; | |
2730 | len = datalen - frags * PAGE_SIZE; | |
2731 | if (len > 0) { | |
2732 | skb_put_zero(skb, len); | |
2733 | datalen = frags * PAGE_SIZE; | |
2734 | } | |
2735 | ||
2736 | i = 0; | |
2737 | frag_len = (datalen/frags) < PAGE_SIZE ? | |
2738 | (datalen/frags) : PAGE_SIZE; | |
2739 | while (datalen > 0) { | |
2740 | if (unlikely(!pkt_dev->page)) { | |
2741 | int node = numa_node_id(); | |
2742 | ||
2743 | if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE)) | |
2744 | node = pkt_dev->node; | |
2745 | pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0); | |
2746 | if (!pkt_dev->page) | |
2747 | break; | |
2748 | } | |
2749 | get_page(pkt_dev->page); | |
2750 | skb_frag_set_page(skb, i, pkt_dev->page); | |
2751 | skb_shinfo(skb)->frags[i].page_offset = 0; | |
2752 | /*last fragment, fill rest of data*/ | |
2753 | if (i == (frags - 1)) | |
2754 | skb_frag_size_set(&skb_shinfo(skb)->frags[i], | |
2755 | (datalen < PAGE_SIZE ? datalen : PAGE_SIZE)); | |
2756 | else | |
2757 | skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len); | |
2758 | datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]); | |
2759 | skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]); | |
2760 | skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]); | |
2761 | i++; | |
2762 | skb_shinfo(skb)->nr_frags = i; | |
2763 | } | |
2764 | } | |
2765 | ||
2766 | /* Stamp the time, and sequence number, | |
2767 | * convert them to network byte order | |
2768 | */ | |
2769 | pgh->pgh_magic = htonl(PKTGEN_MAGIC); | |
2770 | pgh->seq_num = htonl(pkt_dev->seq_num); | |
2771 | ||
2772 | if (pkt_dev->flags & F_NO_TIMESTAMP) { | |
2773 | pgh->tv_sec = 0; | |
2774 | pgh->tv_usec = 0; | |
2775 | } else { | |
2776 | do_gettimeofday(×tamp); | |
2777 | pgh->tv_sec = htonl(timestamp.tv_sec); | |
2778 | pgh->tv_usec = htonl(timestamp.tv_usec); | |
2779 | } | |
2780 | } | |
2781 | ||
2782 | static struct sk_buff *pktgen_alloc_skb(struct net_device *dev, | |
2783 | struct pktgen_dev *pkt_dev) | |
2784 | { | |
2785 | unsigned int extralen = LL_RESERVED_SPACE(dev); | |
2786 | struct sk_buff *skb = NULL; | |
2787 | unsigned int size; | |
2788 | ||
2789 | size = pkt_dev->cur_pkt_size + 64 + extralen + pkt_dev->pkt_overhead; | |
2790 | if (pkt_dev->flags & F_NODE) { | |
2791 | int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id(); | |
2792 | ||
2793 | skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node); | |
2794 | if (likely(skb)) { | |
2795 | skb_reserve(skb, NET_SKB_PAD); | |
2796 | skb->dev = dev; | |
2797 | } | |
2798 | } else { | |
2799 | skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT); | |
2800 | } | |
2801 | ||
2802 | /* the caller pre-fetches from skb->data and reserves for the mac hdr */ | |
2803 | if (likely(skb)) | |
2804 | skb_reserve(skb, extralen - 16); | |
2805 | ||
2806 | return skb; | |
2807 | } | |
2808 | ||
2809 | static struct sk_buff *fill_packet_ipv4(struct net_device *odev, | |
2810 | struct pktgen_dev *pkt_dev) | |
2811 | { | |
2812 | struct sk_buff *skb = NULL; | |
2813 | __u8 *eth; | |
2814 | struct udphdr *udph; | |
2815 | int datalen, iplen; | |
2816 | struct iphdr *iph; | |
2817 | __be16 protocol = htons(ETH_P_IP); | |
2818 | __be32 *mpls; | |
2819 | __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ | |
2820 | __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ | |
2821 | __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ | |
2822 | __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ | |
2823 | u16 queue_map; | |
2824 | ||
2825 | if (pkt_dev->nr_labels) | |
2826 | protocol = htons(ETH_P_MPLS_UC); | |
2827 | ||
2828 | if (pkt_dev->vlan_id != 0xffff) | |
2829 | protocol = htons(ETH_P_8021Q); | |
2830 | ||
2831 | /* Update any of the values, used when we're incrementing various | |
2832 | * fields. | |
2833 | */ | |
2834 | mod_cur_headers(pkt_dev); | |
2835 | queue_map = pkt_dev->cur_queue_map; | |
2836 | ||
2837 | skb = pktgen_alloc_skb(odev, pkt_dev); | |
2838 | if (!skb) { | |
2839 | sprintf(pkt_dev->result, "No memory"); | |
2840 | return NULL; | |
2841 | } | |
2842 | ||
2843 | prefetchw(skb->data); | |
2844 | skb_reserve(skb, 16); | |
2845 | ||
2846 | /* Reserve for ethernet and IP header */ | |
2847 | eth = skb_push(skb, 14); | |
2848 | mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32)); | |
2849 | if (pkt_dev->nr_labels) | |
2850 | mpls_push(mpls, pkt_dev); | |
2851 | ||
2852 | if (pkt_dev->vlan_id != 0xffff) { | |
2853 | if (pkt_dev->svlan_id != 0xffff) { | |
2854 | svlan_tci = skb_put(skb, sizeof(__be16)); | |
2855 | *svlan_tci = build_tci(pkt_dev->svlan_id, | |
2856 | pkt_dev->svlan_cfi, | |
2857 | pkt_dev->svlan_p); | |
2858 | svlan_encapsulated_proto = skb_put(skb, | |
2859 | sizeof(__be16)); | |
2860 | *svlan_encapsulated_proto = htons(ETH_P_8021Q); | |
2861 | } | |
2862 | vlan_tci = skb_put(skb, sizeof(__be16)); | |
2863 | *vlan_tci = build_tci(pkt_dev->vlan_id, | |
2864 | pkt_dev->vlan_cfi, | |
2865 | pkt_dev->vlan_p); | |
2866 | vlan_encapsulated_proto = skb_put(skb, sizeof(__be16)); | |
2867 | *vlan_encapsulated_proto = htons(ETH_P_IP); | |
2868 | } | |
2869 | ||
2870 | skb_reset_mac_header(skb); | |
2871 | skb_set_network_header(skb, skb->len); | |
2872 | iph = skb_put(skb, sizeof(struct iphdr)); | |
2873 | ||
2874 | skb_set_transport_header(skb, skb->len); | |
2875 | udph = skb_put(skb, sizeof(struct udphdr)); | |
2876 | skb_set_queue_mapping(skb, queue_map); | |
2877 | skb->priority = pkt_dev->skb_priority; | |
2878 | ||
2879 | memcpy(eth, pkt_dev->hh, 12); | |
2880 | *(__be16 *) & eth[12] = protocol; | |
2881 | ||
2882 | /* Eth + IPh + UDPh + mpls */ | |
2883 | datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - | |
2884 | pkt_dev->pkt_overhead; | |
2885 | if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) | |
2886 | datalen = sizeof(struct pktgen_hdr); | |
2887 | ||
2888 | udph->source = htons(pkt_dev->cur_udp_src); | |
2889 | udph->dest = htons(pkt_dev->cur_udp_dst); | |
2890 | udph->len = htons(datalen + 8); /* DATA + udphdr */ | |
2891 | udph->check = 0; | |
2892 | ||
2893 | iph->ihl = 5; | |
2894 | iph->version = 4; | |
2895 | iph->ttl = 32; | |
2896 | iph->tos = pkt_dev->tos; | |
2897 | iph->protocol = IPPROTO_UDP; /* UDP */ | |
2898 | iph->saddr = pkt_dev->cur_saddr; | |
2899 | iph->daddr = pkt_dev->cur_daddr; | |
2900 | iph->id = htons(pkt_dev->ip_id); | |
2901 | pkt_dev->ip_id++; | |
2902 | iph->frag_off = 0; | |
2903 | iplen = 20 + 8 + datalen; | |
2904 | iph->tot_len = htons(iplen); | |
2905 | ip_send_check(iph); | |
2906 | skb->protocol = protocol; | |
2907 | skb->dev = odev; | |
2908 | skb->pkt_type = PACKET_HOST; | |
2909 | ||
2910 | pktgen_finalize_skb(pkt_dev, skb, datalen); | |
2911 | ||
2912 | if (!(pkt_dev->flags & F_UDPCSUM)) { | |
2913 | skb->ip_summed = CHECKSUM_NONE; | |
2914 | } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IP_CSUM)) { | |
2915 | skb->ip_summed = CHECKSUM_PARTIAL; | |
2916 | skb->csum = 0; | |
2917 | udp4_hwcsum(skb, iph->saddr, iph->daddr); | |
2918 | } else { | |
2919 | __wsum csum = skb_checksum(skb, skb_transport_offset(skb), datalen + 8, 0); | |
2920 | ||
2921 | /* add protocol-dependent pseudo-header */ | |
2922 | udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr, | |
2923 | datalen + 8, IPPROTO_UDP, csum); | |
2924 | ||
2925 | if (udph->check == 0) | |
2926 | udph->check = CSUM_MANGLED_0; | |
2927 | } | |
2928 | ||
2929 | #ifdef CONFIG_XFRM | |
2930 | if (!process_ipsec(pkt_dev, skb, protocol)) | |
2931 | return NULL; | |
2932 | #endif | |
2933 | ||
2934 | return skb; | |
2935 | } | |
2936 | ||
2937 | static struct sk_buff *fill_packet_ipv6(struct net_device *odev, | |
2938 | struct pktgen_dev *pkt_dev) | |
2939 | { | |
2940 | struct sk_buff *skb = NULL; | |
2941 | __u8 *eth; | |
2942 | struct udphdr *udph; | |
2943 | int datalen, udplen; | |
2944 | struct ipv6hdr *iph; | |
2945 | __be16 protocol = htons(ETH_P_IPV6); | |
2946 | __be32 *mpls; | |
2947 | __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ | |
2948 | __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ | |
2949 | __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ | |
2950 | __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ | |
2951 | u16 queue_map; | |
2952 | ||
2953 | if (pkt_dev->nr_labels) | |
2954 | protocol = htons(ETH_P_MPLS_UC); | |
2955 | ||
2956 | if (pkt_dev->vlan_id != 0xffff) | |
2957 | protocol = htons(ETH_P_8021Q); | |
2958 | ||
2959 | /* Update any of the values, used when we're incrementing various | |
2960 | * fields. | |
2961 | */ | |
2962 | mod_cur_headers(pkt_dev); | |
2963 | queue_map = pkt_dev->cur_queue_map; | |
2964 | ||
2965 | skb = pktgen_alloc_skb(odev, pkt_dev); | |
2966 | if (!skb) { | |
2967 | sprintf(pkt_dev->result, "No memory"); | |
2968 | return NULL; | |
2969 | } | |
2970 | ||
2971 | prefetchw(skb->data); | |
2972 | skb_reserve(skb, 16); | |
2973 | ||
2974 | /* Reserve for ethernet and IP header */ | |
2975 | eth = skb_push(skb, 14); | |
2976 | mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32)); | |
2977 | if (pkt_dev->nr_labels) | |
2978 | mpls_push(mpls, pkt_dev); | |
2979 | ||
2980 | if (pkt_dev->vlan_id != 0xffff) { | |
2981 | if (pkt_dev->svlan_id != 0xffff) { | |
2982 | svlan_tci = skb_put(skb, sizeof(__be16)); | |
2983 | *svlan_tci = build_tci(pkt_dev->svlan_id, | |
2984 | pkt_dev->svlan_cfi, | |
2985 | pkt_dev->svlan_p); | |
2986 | svlan_encapsulated_proto = skb_put(skb, | |
2987 | sizeof(__be16)); | |
2988 | *svlan_encapsulated_proto = htons(ETH_P_8021Q); | |
2989 | } | |
2990 | vlan_tci = skb_put(skb, sizeof(__be16)); | |
2991 | *vlan_tci = build_tci(pkt_dev->vlan_id, | |
2992 | pkt_dev->vlan_cfi, | |
2993 | pkt_dev->vlan_p); | |
2994 | vlan_encapsulated_proto = skb_put(skb, sizeof(__be16)); | |
2995 | *vlan_encapsulated_proto = htons(ETH_P_IPV6); | |
2996 | } | |
2997 | ||
2998 | skb_reset_mac_header(skb); | |
2999 | skb_set_network_header(skb, skb->len); | |
3000 | iph = skb_put(skb, sizeof(struct ipv6hdr)); | |
3001 | ||
3002 | skb_set_transport_header(skb, skb->len); | |
3003 | udph = skb_put(skb, sizeof(struct udphdr)); | |
3004 | skb_set_queue_mapping(skb, queue_map); | |
3005 | skb->priority = pkt_dev->skb_priority; | |
3006 | ||
3007 | memcpy(eth, pkt_dev->hh, 12); | |
3008 | *(__be16 *) ð[12] = protocol; | |
3009 | ||
3010 | /* Eth + IPh + UDPh + mpls */ | |
3011 | datalen = pkt_dev->cur_pkt_size - 14 - | |
3012 | sizeof(struct ipv6hdr) - sizeof(struct udphdr) - | |
3013 | pkt_dev->pkt_overhead; | |
3014 | ||
3015 | if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) { | |
3016 | datalen = sizeof(struct pktgen_hdr); | |
3017 | net_info_ratelimited("increased datalen to %d\n", datalen); | |
3018 | } | |
3019 | ||
3020 | udplen = datalen + sizeof(struct udphdr); | |
3021 | udph->source = htons(pkt_dev->cur_udp_src); | |
3022 | udph->dest = htons(pkt_dev->cur_udp_dst); | |
3023 | udph->len = htons(udplen); | |
3024 | udph->check = 0; | |
3025 | ||
3026 | *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ | |
3027 | ||
3028 | if (pkt_dev->traffic_class) { | |
3029 | /* Version + traffic class + flow (0) */ | |
3030 | *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); | |
3031 | } | |
3032 | ||
3033 | iph->hop_limit = 32; | |
3034 | ||
3035 | iph->payload_len = htons(udplen); | |
3036 | iph->nexthdr = IPPROTO_UDP; | |
3037 | ||
3038 | iph->daddr = pkt_dev->cur_in6_daddr; | |
3039 | iph->saddr = pkt_dev->cur_in6_saddr; | |
3040 | ||
3041 | skb->protocol = protocol; | |
3042 | skb->dev = odev; | |
3043 | skb->pkt_type = PACKET_HOST; | |
3044 | ||
3045 | pktgen_finalize_skb(pkt_dev, skb, datalen); | |
3046 | ||
3047 | if (!(pkt_dev->flags & F_UDPCSUM)) { | |
3048 | skb->ip_summed = CHECKSUM_NONE; | |
3049 | } else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IPV6_CSUM)) { | |
3050 | skb->ip_summed = CHECKSUM_PARTIAL; | |
3051 | skb->csum_start = skb_transport_header(skb) - skb->head; | |
3052 | skb->csum_offset = offsetof(struct udphdr, check); | |
3053 | udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0); | |
3054 | } else { | |
3055 | __wsum csum = skb_checksum(skb, skb_transport_offset(skb), udplen, 0); | |
3056 | ||
3057 | /* add protocol-dependent pseudo-header */ | |
3058 | udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum); | |
3059 | ||
3060 | if (udph->check == 0) | |
3061 | udph->check = CSUM_MANGLED_0; | |
3062 | } | |
3063 | ||
3064 | return skb; | |
3065 | } | |
3066 | ||
3067 | static struct sk_buff *fill_packet(struct net_device *odev, | |
3068 | struct pktgen_dev *pkt_dev) | |
3069 | { | |
3070 | if (pkt_dev->flags & F_IPV6) | |
3071 | return fill_packet_ipv6(odev, pkt_dev); | |
3072 | else | |
3073 | return fill_packet_ipv4(odev, pkt_dev); | |
3074 | } | |
3075 | ||
3076 | static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) | |
3077 | { | |
3078 | pkt_dev->seq_num = 1; | |
3079 | pkt_dev->idle_acc = 0; | |
3080 | pkt_dev->sofar = 0; | |
3081 | pkt_dev->tx_bytes = 0; | |
3082 | pkt_dev->errors = 0; | |
3083 | } | |
3084 | ||
3085 | /* Set up structure for sending pkts, clear counters */ | |
3086 | ||
3087 | static void pktgen_run(struct pktgen_thread *t) | |
3088 | { | |
3089 | struct pktgen_dev *pkt_dev; | |
3090 | int started = 0; | |
3091 | ||
3092 | func_enter(); | |
3093 | ||
3094 | rcu_read_lock(); | |
3095 | list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { | |
3096 | ||
3097 | /* | |
3098 | * setup odev and create initial packet. | |
3099 | */ | |
3100 | pktgen_setup_inject(pkt_dev); | |
3101 | ||
3102 | if (pkt_dev->odev) { | |
3103 | pktgen_clear_counters(pkt_dev); | |
3104 | pkt_dev->skb = NULL; | |
3105 | pkt_dev->started_at = pkt_dev->next_tx = ktime_get(); | |
3106 | ||
3107 | set_pkt_overhead(pkt_dev); | |
3108 | ||
3109 | strcpy(pkt_dev->result, "Starting"); | |
3110 | pkt_dev->running = 1; /* Cranke yeself! */ | |
3111 | started++; | |
3112 | } else | |
3113 | strcpy(pkt_dev->result, "Error starting"); | |
3114 | } | |
3115 | rcu_read_unlock(); | |
3116 | if (started) | |
3117 | t->control &= ~(T_STOP); | |
3118 | } | |
3119 | ||
3120 | static void pktgen_stop_all_threads_ifs(struct pktgen_net *pn) | |
3121 | { | |
3122 | struct pktgen_thread *t; | |
3123 | ||
3124 | func_enter(); | |
3125 | ||
3126 | mutex_lock(&pktgen_thread_lock); | |
3127 | ||
3128 | list_for_each_entry(t, &pn->pktgen_threads, th_list) | |
3129 | t->control |= T_STOP; | |
3130 | ||
3131 | mutex_unlock(&pktgen_thread_lock); | |
3132 | } | |
3133 | ||
3134 | static int thread_is_running(const struct pktgen_thread *t) | |
3135 | { | |
3136 | const struct pktgen_dev *pkt_dev; | |
3137 | ||
3138 | rcu_read_lock(); | |
3139 | list_for_each_entry_rcu(pkt_dev, &t->if_list, list) | |
3140 | if (pkt_dev->running) { | |
3141 | rcu_read_unlock(); | |
3142 | return 1; | |
3143 | } | |
3144 | rcu_read_unlock(); | |
3145 | return 0; | |
3146 | } | |
3147 | ||
3148 | static int pktgen_wait_thread_run(struct pktgen_thread *t) | |
3149 | { | |
3150 | while (thread_is_running(t)) { | |
3151 | ||
3152 | msleep_interruptible(100); | |
3153 | ||
3154 | if (signal_pending(current)) | |
3155 | goto signal; | |
3156 | } | |
3157 | return 1; | |
3158 | signal: | |
3159 | return 0; | |
3160 | } | |
3161 | ||
3162 | static int pktgen_wait_all_threads_run(struct pktgen_net *pn) | |
3163 | { | |
3164 | struct pktgen_thread *t; | |
3165 | int sig = 1; | |
3166 | ||
3167 | mutex_lock(&pktgen_thread_lock); | |
3168 | ||
3169 | list_for_each_entry(t, &pn->pktgen_threads, th_list) { | |
3170 | sig = pktgen_wait_thread_run(t); | |
3171 | if (sig == 0) | |
3172 | break; | |
3173 | } | |
3174 | ||
3175 | if (sig == 0) | |
3176 | list_for_each_entry(t, &pn->pktgen_threads, th_list) | |
3177 | t->control |= (T_STOP); | |
3178 | ||
3179 | mutex_unlock(&pktgen_thread_lock); | |
3180 | return sig; | |
3181 | } | |
3182 | ||
3183 | static void pktgen_run_all_threads(struct pktgen_net *pn) | |
3184 | { | |
3185 | struct pktgen_thread *t; | |
3186 | ||
3187 | func_enter(); | |
3188 | ||
3189 | mutex_lock(&pktgen_thread_lock); | |
3190 | ||
3191 | list_for_each_entry(t, &pn->pktgen_threads, th_list) | |
3192 | t->control |= (T_RUN); | |
3193 | ||
3194 | mutex_unlock(&pktgen_thread_lock); | |
3195 | ||
3196 | /* Propagate thread->control */ | |
3197 | schedule_timeout_interruptible(msecs_to_jiffies(125)); | |
3198 | ||
3199 | pktgen_wait_all_threads_run(pn); | |
3200 | } | |
3201 | ||
3202 | static void pktgen_reset_all_threads(struct pktgen_net *pn) | |
3203 | { | |
3204 | struct pktgen_thread *t; | |
3205 | ||
3206 | func_enter(); | |
3207 | ||
3208 | mutex_lock(&pktgen_thread_lock); | |
3209 | ||
3210 | list_for_each_entry(t, &pn->pktgen_threads, th_list) | |
3211 | t->control |= (T_REMDEVALL); | |
3212 | ||
3213 | mutex_unlock(&pktgen_thread_lock); | |
3214 | ||
3215 | /* Propagate thread->control */ | |
3216 | schedule_timeout_interruptible(msecs_to_jiffies(125)); | |
3217 | ||
3218 | pktgen_wait_all_threads_run(pn); | |
3219 | } | |
3220 | ||
3221 | static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) | |
3222 | { | |
3223 | __u64 bps, mbps, pps; | |
3224 | char *p = pkt_dev->result; | |
3225 | ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, | |
3226 | pkt_dev->started_at); | |
3227 | ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); | |
3228 | ||
3229 | p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", | |
3230 | (unsigned long long)ktime_to_us(elapsed), | |
3231 | (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), | |
3232 | (unsigned long long)ktime_to_us(idle), | |
3233 | (unsigned long long)pkt_dev->sofar, | |
3234 | pkt_dev->cur_pkt_size, nr_frags); | |
3235 | ||
3236 | pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, | |
3237 | ktime_to_ns(elapsed)); | |
3238 | ||
3239 | bps = pps * 8 * pkt_dev->cur_pkt_size; | |
3240 | ||
3241 | mbps = bps; | |
3242 | do_div(mbps, 1000000); | |
3243 | p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", | |
3244 | (unsigned long long)pps, | |
3245 | (unsigned long long)mbps, | |
3246 | (unsigned long long)bps, | |
3247 | (unsigned long long)pkt_dev->errors); | |
3248 | } | |
3249 | ||
3250 | /* Set stopped-at timer, remove from running list, do counters & statistics */ | |
3251 | static int pktgen_stop_device(struct pktgen_dev *pkt_dev) | |
3252 | { | |
3253 | int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; | |
3254 | ||
3255 | if (!pkt_dev->running) { | |
3256 | pr_warn("interface: %s is already stopped\n", | |
3257 | pkt_dev->odevname); | |
3258 | return -EINVAL; | |
3259 | } | |
3260 | ||
3261 | pkt_dev->running = 0; | |
3262 | kfree_skb(pkt_dev->skb); | |
3263 | pkt_dev->skb = NULL; | |
3264 | pkt_dev->stopped_at = ktime_get(); | |
3265 | ||
3266 | show_results(pkt_dev, nr_frags); | |
3267 | ||
3268 | return 0; | |
3269 | } | |
3270 | ||
3271 | static struct pktgen_dev *next_to_run(struct pktgen_thread *t) | |
3272 | { | |
3273 | struct pktgen_dev *pkt_dev, *best = NULL; | |
3274 | ||
3275 | rcu_read_lock(); | |
3276 | list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { | |
3277 | if (!pkt_dev->running) | |
3278 | continue; | |
3279 | if (best == NULL) | |
3280 | best = pkt_dev; | |
3281 | else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0) | |
3282 | best = pkt_dev; | |
3283 | } | |
3284 | rcu_read_unlock(); | |
3285 | ||
3286 | return best; | |
3287 | } | |
3288 | ||
3289 | static void pktgen_stop(struct pktgen_thread *t) | |
3290 | { | |
3291 | struct pktgen_dev *pkt_dev; | |
3292 | ||
3293 | func_enter(); | |
3294 | ||
3295 | rcu_read_lock(); | |
3296 | ||
3297 | list_for_each_entry_rcu(pkt_dev, &t->if_list, list) { | |
3298 | pktgen_stop_device(pkt_dev); | |
3299 | } | |
3300 | ||
3301 | rcu_read_unlock(); | |
3302 | } | |
3303 | ||
3304 | /* | |
3305 | * one of our devices needs to be removed - find it | |
3306 | * and remove it | |
3307 | */ | |
3308 | static void pktgen_rem_one_if(struct pktgen_thread *t) | |
3309 | { | |
3310 | struct list_head *q, *n; | |
3311 | struct pktgen_dev *cur; | |
3312 | ||
3313 | func_enter(); | |
3314 | ||
3315 | list_for_each_safe(q, n, &t->if_list) { | |
3316 | cur = list_entry(q, struct pktgen_dev, list); | |
3317 | ||
3318 | if (!cur->removal_mark) | |
3319 | continue; | |
3320 | ||
3321 | kfree_skb(cur->skb); | |
3322 | cur->skb = NULL; | |
3323 | ||
3324 | pktgen_remove_device(t, cur); | |
3325 | ||
3326 | break; | |
3327 | } | |
3328 | } | |
3329 | ||
3330 | static void pktgen_rem_all_ifs(struct pktgen_thread *t) | |
3331 | { | |
3332 | struct list_head *q, *n; | |
3333 | struct pktgen_dev *cur; | |
3334 | ||
3335 | func_enter(); | |
3336 | ||
3337 | /* Remove all devices, free mem */ | |
3338 | ||
3339 | list_for_each_safe(q, n, &t->if_list) { | |
3340 | cur = list_entry(q, struct pktgen_dev, list); | |
3341 | ||
3342 | kfree_skb(cur->skb); | |
3343 | cur->skb = NULL; | |
3344 | ||
3345 | pktgen_remove_device(t, cur); | |
3346 | } | |
3347 | } | |
3348 | ||
3349 | static void pktgen_rem_thread(struct pktgen_thread *t) | |
3350 | { | |
3351 | /* Remove from the thread list */ | |
3352 | remove_proc_entry(t->tsk->comm, t->net->proc_dir); | |
3353 | } | |
3354 | ||
3355 | static void pktgen_resched(struct pktgen_dev *pkt_dev) | |
3356 | { | |
3357 | ktime_t idle_start = ktime_get(); | |
3358 | schedule(); | |
3359 | pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); | |
3360 | } | |
3361 | ||
3362 | static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) | |
3363 | { | |
3364 | ktime_t idle_start = ktime_get(); | |
3365 | ||
3366 | while (refcount_read(&(pkt_dev->skb->users)) != 1) { | |
3367 | if (signal_pending(current)) | |
3368 | break; | |
3369 | ||
3370 | if (need_resched()) | |
3371 | pktgen_resched(pkt_dev); | |
3372 | else | |
3373 | cpu_relax(); | |
3374 | } | |
3375 | pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start)); | |
3376 | } | |
3377 | ||
3378 | static void pktgen_xmit(struct pktgen_dev *pkt_dev) | |
3379 | { | |
3380 | unsigned int burst = ACCESS_ONCE(pkt_dev->burst); | |
3381 | struct net_device *odev = pkt_dev->odev; | |
3382 | struct netdev_queue *txq; | |
3383 | struct sk_buff *skb; | |
3384 | int ret; | |
3385 | ||
3386 | /* If device is offline, then don't send */ | |
3387 | if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { | |
3388 | pktgen_stop_device(pkt_dev); | |
3389 | return; | |
3390 | } | |
3391 | ||
3392 | /* This is max DELAY, this has special meaning of | |
3393 | * "never transmit" | |
3394 | */ | |
3395 | if (unlikely(pkt_dev->delay == ULLONG_MAX)) { | |
3396 | pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX); | |
3397 | return; | |
3398 | } | |
3399 | ||
3400 | /* If no skb or clone count exhausted then get new one */ | |
3401 | if (!pkt_dev->skb || (pkt_dev->last_ok && | |
3402 | ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { | |
3403 | /* build a new pkt */ | |
3404 | kfree_skb(pkt_dev->skb); | |
3405 | ||
3406 | pkt_dev->skb = fill_packet(odev, pkt_dev); | |
3407 | if (pkt_dev->skb == NULL) { | |
3408 | pr_err("ERROR: couldn't allocate skb in fill_packet\n"); | |
3409 | schedule(); | |
3410 | pkt_dev->clone_count--; /* back out increment, OOM */ | |
3411 | return; | |
3412 | } | |
3413 | pkt_dev->last_pkt_size = pkt_dev->skb->len; | |
3414 | pkt_dev->clone_count = 0; /* reset counter */ | |
3415 | } | |
3416 | ||
3417 | if (pkt_dev->delay && pkt_dev->last_ok) | |
3418 | spin(pkt_dev, pkt_dev->next_tx); | |
3419 | ||
3420 | if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) { | |
3421 | skb = pkt_dev->skb; | |
3422 | skb->protocol = eth_type_trans(skb, skb->dev); | |
3423 | refcount_add(burst, &skb->users); | |
3424 | local_bh_disable(); | |
3425 | do { | |
3426 | ret = netif_receive_skb(skb); | |
3427 | if (ret == NET_RX_DROP) | |
3428 | pkt_dev->errors++; | |
3429 | pkt_dev->sofar++; | |
3430 | pkt_dev->seq_num++; | |
3431 | if (refcount_read(&skb->users) != burst) { | |
3432 | /* skb was queued by rps/rfs or taps, | |
3433 | * so cannot reuse this skb | |
3434 | */ | |
3435 | WARN_ON(refcount_sub_and_test(burst - 1, &skb->users)); | |
3436 | /* get out of the loop and wait | |
3437 | * until skb is consumed | |
3438 | */ | |
3439 | break; | |
3440 | } | |
3441 | /* skb was 'freed' by stack, so clean few | |
3442 | * bits and reuse it | |
3443 | */ | |
3444 | skb_reset_tc(skb); | |
3445 | } while (--burst > 0); | |
3446 | goto out; /* Skips xmit_mode M_START_XMIT */ | |
3447 | } else if (pkt_dev->xmit_mode == M_QUEUE_XMIT) { | |
3448 | local_bh_disable(); | |
3449 | refcount_inc(&pkt_dev->skb->users); | |
3450 | ||
3451 | ret = dev_queue_xmit(pkt_dev->skb); | |
3452 | switch (ret) { | |
3453 | case NET_XMIT_SUCCESS: | |
3454 | pkt_dev->sofar++; | |
3455 | pkt_dev->seq_num++; | |
3456 | pkt_dev->tx_bytes += pkt_dev->last_pkt_size; | |
3457 | break; | |
3458 | case NET_XMIT_DROP: | |
3459 | case NET_XMIT_CN: | |
3460 | /* These are all valid return codes for a qdisc but | |
3461 | * indicate packets are being dropped or will likely | |
3462 | * be dropped soon. | |
3463 | */ | |
3464 | case NETDEV_TX_BUSY: | |
3465 | /* qdisc may call dev_hard_start_xmit directly in cases | |
3466 | * where no queues exist e.g. loopback device, virtual | |
3467 | * devices, etc. In this case we need to handle | |
3468 | * NETDEV_TX_ codes. | |
3469 | */ | |
3470 | default: | |
3471 | pkt_dev->errors++; | |
3472 | net_info_ratelimited("%s xmit error: %d\n", | |
3473 | pkt_dev->odevname, ret); | |
3474 | break; | |
3475 | } | |
3476 | goto out; | |
3477 | } | |
3478 | ||
3479 | txq = skb_get_tx_queue(odev, pkt_dev->skb); | |
3480 | ||
3481 | local_bh_disable(); | |
3482 | ||
3483 | HARD_TX_LOCK(odev, txq, smp_processor_id()); | |
3484 | ||
3485 | if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) { | |
3486 | ret = NETDEV_TX_BUSY; | |
3487 | pkt_dev->last_ok = 0; | |
3488 | goto unlock; | |
3489 | } | |
3490 | refcount_add(burst, &pkt_dev->skb->users); | |
3491 | ||
3492 | xmit_more: | |
3493 | ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0); | |
3494 | ||
3495 | switch (ret) { | |
3496 | case NETDEV_TX_OK: | |
3497 | pkt_dev->last_ok = 1; | |
3498 | pkt_dev->sofar++; | |
3499 | pkt_dev->seq_num++; | |
3500 | pkt_dev->tx_bytes += pkt_dev->last_pkt_size; | |
3501 | if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq)) | |
3502 | goto xmit_more; | |
3503 | break; | |
3504 | case NET_XMIT_DROP: | |
3505 | case NET_XMIT_CN: | |
3506 | /* skb has been consumed */ | |
3507 | pkt_dev->errors++; | |
3508 | break; | |
3509 | default: /* Drivers are not supposed to return other values! */ | |
3510 | net_info_ratelimited("%s xmit error: %d\n", | |
3511 | pkt_dev->odevname, ret); | |
3512 | pkt_dev->errors++; | |
3513 | /* fallthru */ | |
3514 | case NETDEV_TX_BUSY: | |
3515 | /* Retry it next time */ | |
3516 | refcount_dec(&(pkt_dev->skb->users)); | |
3517 | pkt_dev->last_ok = 0; | |
3518 | } | |
3519 | if (unlikely(burst)) | |
3520 | WARN_ON(refcount_sub_and_test(burst, &pkt_dev->skb->users)); | |
3521 | unlock: | |
3522 | HARD_TX_UNLOCK(odev, txq); | |
3523 | ||
3524 | out: | |
3525 | local_bh_enable(); | |
3526 | ||
3527 | /* If pkt_dev->count is zero, then run forever */ | |
3528 | if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { | |
3529 | pktgen_wait_for_skb(pkt_dev); | |
3530 | ||
3531 | /* Done with this */ | |
3532 | pktgen_stop_device(pkt_dev); | |
3533 | } | |
3534 | } | |
3535 | ||
3536 | /* | |
3537 | * Main loop of the thread goes here | |
3538 | */ | |
3539 | ||
3540 | static int pktgen_thread_worker(void *arg) | |
3541 | { | |
3542 | DEFINE_WAIT(wait); | |
3543 | struct pktgen_thread *t = arg; | |
3544 | struct pktgen_dev *pkt_dev = NULL; | |
3545 | int cpu = t->cpu; | |
3546 | ||
3547 | BUG_ON(smp_processor_id() != cpu); | |
3548 | ||
3549 | init_waitqueue_head(&t->queue); | |
3550 | complete(&t->start_done); | |
3551 | ||
3552 | pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); | |
3553 | ||
3554 | set_freezable(); | |
3555 | ||
3556 | while (!kthread_should_stop()) { | |
3557 | pkt_dev = next_to_run(t); | |
3558 | ||
3559 | if (unlikely(!pkt_dev && t->control == 0)) { | |
3560 | if (t->net->pktgen_exiting) | |
3561 | break; | |
3562 | wait_event_interruptible_timeout(t->queue, | |
3563 | t->control != 0, | |
3564 | HZ/10); | |
3565 | try_to_freeze(); | |
3566 | continue; | |
3567 | } | |
3568 | ||
3569 | if (likely(pkt_dev)) { | |
3570 | pktgen_xmit(pkt_dev); | |
3571 | ||
3572 | if (need_resched()) | |
3573 | pktgen_resched(pkt_dev); | |
3574 | else | |
3575 | cpu_relax(); | |
3576 | } | |
3577 | ||
3578 | if (t->control & T_STOP) { | |
3579 | pktgen_stop(t); | |
3580 | t->control &= ~(T_STOP); | |
3581 | } | |
3582 | ||
3583 | if (t->control & T_RUN) { | |
3584 | pktgen_run(t); | |
3585 | t->control &= ~(T_RUN); | |
3586 | } | |
3587 | ||
3588 | if (t->control & T_REMDEVALL) { | |
3589 | pktgen_rem_all_ifs(t); | |
3590 | t->control &= ~(T_REMDEVALL); | |
3591 | } | |
3592 | ||
3593 | if (t->control & T_REMDEV) { | |
3594 | pktgen_rem_one_if(t); | |
3595 | t->control &= ~(T_REMDEV); | |
3596 | } | |
3597 | ||
3598 | try_to_freeze(); | |
3599 | } | |
3600 | ||
3601 | pr_debug("%s stopping all device\n", t->tsk->comm); | |
3602 | pktgen_stop(t); | |
3603 | ||
3604 | pr_debug("%s removing all device\n", t->tsk->comm); | |
3605 | pktgen_rem_all_ifs(t); | |
3606 | ||
3607 | pr_debug("%s removing thread\n", t->tsk->comm); | |
3608 | pktgen_rem_thread(t); | |
3609 | ||
3610 | return 0; | |
3611 | } | |
3612 | ||
3613 | static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, | |
3614 | const char *ifname, bool exact) | |
3615 | { | |
3616 | struct pktgen_dev *p, *pkt_dev = NULL; | |
3617 | size_t len = strlen(ifname); | |
3618 | ||
3619 | rcu_read_lock(); | |
3620 | list_for_each_entry_rcu(p, &t->if_list, list) | |
3621 | if (strncmp(p->odevname, ifname, len) == 0) { | |
3622 | if (p->odevname[len]) { | |
3623 | if (exact || p->odevname[len] != '@') | |
3624 | continue; | |
3625 | } | |
3626 | pkt_dev = p; | |
3627 | break; | |
3628 | } | |
3629 | ||
3630 | rcu_read_unlock(); | |
3631 | pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev); | |
3632 | return pkt_dev; | |
3633 | } | |
3634 | ||
3635 | /* | |
3636 | * Adds a dev at front of if_list. | |
3637 | */ | |
3638 | ||
3639 | static int add_dev_to_thread(struct pktgen_thread *t, | |
3640 | struct pktgen_dev *pkt_dev) | |
3641 | { | |
3642 | int rv = 0; | |
3643 | ||
3644 | /* This function cannot be called concurrently, as its called | |
3645 | * under pktgen_thread_lock mutex, but it can run from | |
3646 | * userspace on another CPU than the kthread. The if_lock() | |
3647 | * is used here to sync with concurrent instances of | |
3648 | * _rem_dev_from_if_list() invoked via kthread, which is also | |
3649 | * updating the if_list */ | |
3650 | if_lock(t); | |
3651 | ||
3652 | if (pkt_dev->pg_thread) { | |
3653 | pr_err("ERROR: already assigned to a thread\n"); | |
3654 | rv = -EBUSY; | |
3655 | goto out; | |
3656 | } | |
3657 | ||
3658 | pkt_dev->running = 0; | |
3659 | pkt_dev->pg_thread = t; | |
3660 | list_add_rcu(&pkt_dev->list, &t->if_list); | |
3661 | ||
3662 | out: | |
3663 | if_unlock(t); | |
3664 | return rv; | |
3665 | } | |
3666 | ||
3667 | /* Called under thread lock */ | |
3668 | ||
3669 | static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) | |
3670 | { | |
3671 | struct pktgen_dev *pkt_dev; | |
3672 | int err; | |
3673 | int node = cpu_to_node(t->cpu); | |
3674 | ||
3675 | /* We don't allow a device to be on several threads */ | |
3676 | ||
3677 | pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND); | |
3678 | if (pkt_dev) { | |
3679 | pr_err("ERROR: interface already used\n"); | |
3680 | return -EBUSY; | |
3681 | } | |
3682 | ||
3683 | pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); | |
3684 | if (!pkt_dev) | |
3685 | return -ENOMEM; | |
3686 | ||
3687 | strcpy(pkt_dev->odevname, ifname); | |
3688 | pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state), | |
3689 | node); | |
3690 | if (pkt_dev->flows == NULL) { | |
3691 | kfree(pkt_dev); | |
3692 | return -ENOMEM; | |
3693 | } | |
3694 | ||
3695 | pkt_dev->removal_mark = 0; | |
3696 | pkt_dev->nfrags = 0; | |
3697 | pkt_dev->delay = pg_delay_d; | |
3698 | pkt_dev->count = pg_count_d; | |
3699 | pkt_dev->sofar = 0; | |
3700 | pkt_dev->udp_src_min = 9; /* sink port */ | |
3701 | pkt_dev->udp_src_max = 9; | |
3702 | pkt_dev->udp_dst_min = 9; | |
3703 | pkt_dev->udp_dst_max = 9; | |
3704 | pkt_dev->vlan_p = 0; | |
3705 | pkt_dev->vlan_cfi = 0; | |
3706 | pkt_dev->vlan_id = 0xffff; | |
3707 | pkt_dev->svlan_p = 0; | |
3708 | pkt_dev->svlan_cfi = 0; | |
3709 | pkt_dev->svlan_id = 0xffff; | |
3710 | pkt_dev->burst = 1; | |
3711 | pkt_dev->node = -1; | |
3712 | ||
3713 | err = pktgen_setup_dev(t->net, pkt_dev, ifname); | |
3714 | if (err) | |
3715 | goto out1; | |
3716 | if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING) | |
3717 | pkt_dev->clone_skb = pg_clone_skb_d; | |
3718 | ||
3719 | pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir, | |
3720 | &pktgen_if_fops, pkt_dev); | |
3721 | if (!pkt_dev->entry) { | |
3722 | pr_err("cannot create %s/%s procfs entry\n", | |
3723 | PG_PROC_DIR, ifname); | |
3724 | err = -EINVAL; | |
3725 | goto out2; | |
3726 | } | |
3727 | #ifdef CONFIG_XFRM | |
3728 | pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; | |
3729 | pkt_dev->ipsproto = IPPROTO_ESP; | |
3730 | ||
3731 | /* xfrm tunnel mode needs additional dst to extract outter | |
3732 | * ip header protocol/ttl/id field, here creat a phony one. | |
3733 | * instead of looking for a valid rt, which definitely hurting | |
3734 | * performance under such circumstance. | |
3735 | */ | |
3736 | pkt_dev->dstops.family = AF_INET; | |
3737 | pkt_dev->dst.dev = pkt_dev->odev; | |
3738 | dst_init_metrics(&pkt_dev->dst, pktgen_dst_metrics, false); | |
3739 | pkt_dev->dst.child = &pkt_dev->dst; | |
3740 | pkt_dev->dst.ops = &pkt_dev->dstops; | |
3741 | #endif | |
3742 | ||
3743 | return add_dev_to_thread(t, pkt_dev); | |
3744 | out2: | |
3745 | dev_put(pkt_dev->odev); | |
3746 | out1: | |
3747 | #ifdef CONFIG_XFRM | |
3748 | free_SAs(pkt_dev); | |
3749 | #endif | |
3750 | vfree(pkt_dev->flows); | |
3751 | kfree(pkt_dev); | |
3752 | return err; | |
3753 | } | |
3754 | ||
3755 | static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn) | |
3756 | { | |
3757 | struct pktgen_thread *t; | |
3758 | struct proc_dir_entry *pe; | |
3759 | struct task_struct *p; | |
3760 | ||
3761 | t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL, | |
3762 | cpu_to_node(cpu)); | |
3763 | if (!t) { | |
3764 | pr_err("ERROR: out of memory, can't create new thread\n"); | |
3765 | return -ENOMEM; | |
3766 | } | |
3767 | ||
3768 | mutex_init(&t->if_lock); | |
3769 | t->cpu = cpu; | |
3770 | ||
3771 | INIT_LIST_HEAD(&t->if_list); | |
3772 | ||
3773 | list_add_tail(&t->th_list, &pn->pktgen_threads); | |
3774 | init_completion(&t->start_done); | |
3775 | ||
3776 | p = kthread_create_on_node(pktgen_thread_worker, | |
3777 | t, | |
3778 | cpu_to_node(cpu), | |
3779 | "kpktgend_%d", cpu); | |
3780 | if (IS_ERR(p)) { | |
3781 | pr_err("kernel_thread() failed for cpu %d\n", t->cpu); | |
3782 | list_del(&t->th_list); | |
3783 | kfree(t); | |
3784 | return PTR_ERR(p); | |
3785 | } | |
3786 | kthread_bind(p, cpu); | |
3787 | t->tsk = p; | |
3788 | ||
3789 | pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir, | |
3790 | &pktgen_thread_fops, t); | |
3791 | if (!pe) { | |
3792 | pr_err("cannot create %s/%s procfs entry\n", | |
3793 | PG_PROC_DIR, t->tsk->comm); | |
3794 | kthread_stop(p); | |
3795 | list_del(&t->th_list); | |
3796 | kfree(t); | |
3797 | return -EINVAL; | |
3798 | } | |
3799 | ||
3800 | t->net = pn; | |
3801 | get_task_struct(p); | |
3802 | wake_up_process(p); | |
3803 | wait_for_completion(&t->start_done); | |
3804 | ||
3805 | return 0; | |
3806 | } | |
3807 | ||
3808 | /* | |
3809 | * Removes a device from the thread if_list. | |
3810 | */ | |
3811 | static void _rem_dev_from_if_list(struct pktgen_thread *t, | |
3812 | struct pktgen_dev *pkt_dev) | |
3813 | { | |
3814 | struct list_head *q, *n; | |
3815 | struct pktgen_dev *p; | |
3816 | ||
3817 | if_lock(t); | |
3818 | list_for_each_safe(q, n, &t->if_list) { | |
3819 | p = list_entry(q, struct pktgen_dev, list); | |
3820 | if (p == pkt_dev) | |
3821 | list_del_rcu(&p->list); | |
3822 | } | |
3823 | if_unlock(t); | |
3824 | } | |
3825 | ||
3826 | static int pktgen_remove_device(struct pktgen_thread *t, | |
3827 | struct pktgen_dev *pkt_dev) | |
3828 | { | |
3829 | pr_debug("remove_device pkt_dev=%p\n", pkt_dev); | |
3830 | ||
3831 | if (pkt_dev->running) { | |
3832 | pr_warn("WARNING: trying to remove a running interface, stopping it now\n"); | |
3833 | pktgen_stop_device(pkt_dev); | |
3834 | } | |
3835 | ||
3836 | /* Dis-associate from the interface */ | |
3837 | ||
3838 | if (pkt_dev->odev) { | |
3839 | dev_put(pkt_dev->odev); | |
3840 | pkt_dev->odev = NULL; | |
3841 | } | |
3842 | ||
3843 | /* Remove proc before if_list entry, because add_device uses | |
3844 | * list to determine if interface already exist, avoid race | |
3845 | * with proc_create_data() */ | |
3846 | proc_remove(pkt_dev->entry); | |
3847 | ||
3848 | /* And update the thread if_list */ | |
3849 | _rem_dev_from_if_list(t, pkt_dev); | |
3850 | ||
3851 | #ifdef CONFIG_XFRM | |
3852 | free_SAs(pkt_dev); | |
3853 | #endif | |
3854 | vfree(pkt_dev->flows); | |
3855 | if (pkt_dev->page) | |
3856 | put_page(pkt_dev->page); | |
3857 | kfree_rcu(pkt_dev, rcu); | |
3858 | return 0; | |
3859 | } | |
3860 | ||
3861 | static int __net_init pg_net_init(struct net *net) | |
3862 | { | |
3863 | struct pktgen_net *pn = net_generic(net, pg_net_id); | |
3864 | struct proc_dir_entry *pe; | |
3865 | int cpu, ret = 0; | |
3866 | ||
3867 | pn->net = net; | |
3868 | INIT_LIST_HEAD(&pn->pktgen_threads); | |
3869 | pn->pktgen_exiting = false; | |
3870 | pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net); | |
3871 | if (!pn->proc_dir) { | |
3872 | pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR); | |
3873 | return -ENODEV; | |
3874 | } | |
3875 | pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_fops); | |
3876 | if (pe == NULL) { | |
3877 | pr_err("cannot create %s procfs entry\n", PGCTRL); | |
3878 | ret = -EINVAL; | |
3879 | goto remove; | |
3880 | } | |
3881 | ||
3882 | for_each_online_cpu(cpu) { | |
3883 | int err; | |
3884 | ||
3885 | err = pktgen_create_thread(cpu, pn); | |
3886 | if (err) | |
3887 | pr_warn("Cannot create thread for cpu %d (%d)\n", | |
3888 | cpu, err); | |
3889 | } | |
3890 | ||
3891 | if (list_empty(&pn->pktgen_threads)) { | |
3892 | pr_err("Initialization failed for all threads\n"); | |
3893 | ret = -ENODEV; | |
3894 | goto remove_entry; | |
3895 | } | |
3896 | ||
3897 | return 0; | |
3898 | ||
3899 | remove_entry: | |
3900 | remove_proc_entry(PGCTRL, pn->proc_dir); | |
3901 | remove: | |
3902 | remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); | |
3903 | return ret; | |
3904 | } | |
3905 | ||
3906 | static void __net_exit pg_net_exit(struct net *net) | |
3907 | { | |
3908 | struct pktgen_net *pn = net_generic(net, pg_net_id); | |
3909 | struct pktgen_thread *t; | |
3910 | struct list_head *q, *n; | |
3911 | LIST_HEAD(list); | |
3912 | ||
3913 | /* Stop all interfaces & threads */ | |
3914 | pn->pktgen_exiting = true; | |
3915 | ||
3916 | mutex_lock(&pktgen_thread_lock); | |
3917 | list_splice_init(&pn->pktgen_threads, &list); | |
3918 | mutex_unlock(&pktgen_thread_lock); | |
3919 | ||
3920 | list_for_each_safe(q, n, &list) { | |
3921 | t = list_entry(q, struct pktgen_thread, th_list); | |
3922 | list_del(&t->th_list); | |
3923 | kthread_stop(t->tsk); | |
3924 | put_task_struct(t->tsk); | |
3925 | kfree(t); | |
3926 | } | |
3927 | ||
3928 | remove_proc_entry(PGCTRL, pn->proc_dir); | |
3929 | remove_proc_entry(PG_PROC_DIR, pn->net->proc_net); | |
3930 | } | |
3931 | ||
3932 | static struct pernet_operations pg_net_ops = { | |
3933 | .init = pg_net_init, | |
3934 | .exit = pg_net_exit, | |
3935 | .id = &pg_net_id, | |
3936 | .size = sizeof(struct pktgen_net), | |
3937 | }; | |
3938 | ||
3939 | static int __init pg_init(void) | |
3940 | { | |
3941 | int ret = 0; | |
3942 | ||
3943 | pr_info("%s", version); | |
3944 | ret = register_pernet_subsys(&pg_net_ops); | |
3945 | if (ret) | |
3946 | return ret; | |
3947 | ret = register_netdevice_notifier(&pktgen_notifier_block); | |
3948 | if (ret) | |
3949 | unregister_pernet_subsys(&pg_net_ops); | |
3950 | ||
3951 | return ret; | |
3952 | } | |
3953 | ||
3954 | static void __exit pg_cleanup(void) | |
3955 | { | |
3956 | unregister_netdevice_notifier(&pktgen_notifier_block); | |
3957 | unregister_pernet_subsys(&pg_net_ops); | |
3958 | /* Don't need rcu_barrier() due to use of kfree_rcu() */ | |
3959 | } | |
3960 | ||
3961 | module_init(pg_init); | |
3962 | module_exit(pg_cleanup); | |
3963 | ||
3964 | MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); | |
3965 | MODULE_DESCRIPTION("Packet Generator tool"); | |
3966 | MODULE_LICENSE("GPL"); | |
3967 | MODULE_VERSION(VERSION); | |
3968 | module_param(pg_count_d, int, 0); | |
3969 | MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); | |
3970 | module_param(pg_delay_d, int, 0); | |
3971 | MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); | |
3972 | module_param(pg_clone_skb_d, int, 0); | |
3973 | MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); | |
3974 | module_param(debug, int, 0); | |
3975 | MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); |