1 /* 2 * Authors: 3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se> 4 * Uppsala University and 5 * Swedish University of Agricultural Sciences 6 * 7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> 8 * Ben Greear <greearb@candelatech.com> 9 * Jens Låås <jens.laas@data.slu.se> 10 * 11 * This program is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License 13 * as published by the Free Software Foundation; either version 14 * 2 of the License, or (at your option) any later version. 15 * 16 * 17 * A tool for loading the network with preconfigurated packets. 18 * The tool is implemented as a linux module. Parameters are output 19 * device, delay (to hard_xmit), number of packets, and whether 20 * to use multiple SKBs or just the same one. 21 * pktgen uses the installed interface's output routine. 22 * 23 * Additional hacking by: 24 * 25 * Jens.Laas@data.slu.se 26 * Improved by ANK. 010120. 27 * Improved by ANK even more. 010212. 28 * MAC address typo fixed. 010417 --ro 29 * Integrated. 020301 --DaveM 30 * Added multiskb option 020301 --DaveM 31 * Scaling of results. 020417--sigurdur@linpro.no 32 * Significant re-work of the module: 33 * * Convert to threaded model to more efficiently be able to transmit 34 * and receive on multiple interfaces at once. 35 * * Converted many counters to __u64 to allow longer runs. 36 * * Allow configuration of ranges, like min/max IP address, MACs, 37 * and UDP-ports, for both source and destination, and can 38 * set to use a random distribution or sequentially walk the range. 39 * * Can now change most values after starting. 40 * * Place 12-byte packet in UDP payload with magic number, 41 * sequence number, and timestamp. 42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and 43 * latencies (with micro-second) precision. 44 * * Add IOCTL interface to easily get counters & configuration. 45 * --Ben Greear <greearb@candelatech.com> 46 * 47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct 48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0 49 * as a "fastpath" with a configurable number of clones after alloc's. 50 * clone_skb=0 means all packets are allocated this also means ranges time 51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100 52 * clones. 53 * 54 * Also moved to /proc/net/pktgen/ 55 * --ro 56 * 57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever 58 * mistakes. Also merged in DaveM's patch in the -pre6 patch. 59 * --Ben Greear <greearb@candelatech.com> 60 * 61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br) 62 * 63 * 64 * 021124 Finished major redesign and rewrite for new functionality. 65 * See Documentation/networking/pktgen.txt for how to use this. 66 * 67 * The new operation: 68 * For each CPU one thread/process is created at start. This process checks 69 * for running devices in the if_list and sends packets until count is 0 it 70 * also the thread checks the thread->control which is used for inter-process 71 * communication. controlling process "posts" operations to the threads this 72 * way. The if_lock should be possible to remove when add/rem_device is merged 73 * into this too. 74 * 75 * By design there should only be *one* "controlling" process. In practice 76 * multiple write accesses gives unpredictable result. Understood by "write" 77 * to /proc gives result code thats should be read be the "writer". 78 * For practical use this should be no problem. 79 * 80 * Note when adding devices to a specific CPU there good idea to also assign 81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU. 82 * --ro 83 * 84 * Fix refcount off by one if first packet fails, potential null deref, 85 * memleak 030710- KJP 86 * 87 * First "ranges" functionality for ipv6 030726 --ro 88 * 89 * Included flow support. 030802 ANK. 90 * 91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org> 92 * 93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419 94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604 95 * 96 * New xmit() return, do_div and misc clean up by Stephen Hemminger 97 * <shemminger@osdl.org> 040923 98 * 99 * Randy Dunlap fixed u64 printk compiler waring 100 * 101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org> 102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213 103 * 104 * Corrections from Nikolai Malykh (nmalykh@bilim.com) 105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230 106 * 107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com> 108 * 050103 109 * 110 * MPLS support by Steven Whitehouse <steve@chygwyn.com> 111 * 112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com> 113 * 114 * Fixed src_mac command to set source mac of packet to value specified in 115 * command by Adit Ranadive <adit.262@gmail.com> 116 * 117 */ 118 #include <linux/sys.h> 119 #include <linux/types.h> 120 #include <linux/module.h> 121 #include <linux/moduleparam.h> 122 #include <linux/kernel.h> 123 #include <linux/mutex.h> 124 #include <linux/sched.h> 125 #include <linux/slab.h> 126 #include <linux/vmalloc.h> 127 #include <linux/unistd.h> 128 #include <linux/string.h> 129 #include <linux/ptrace.h> 130 #include <linux/errno.h> 131 #include <linux/ioport.h> 132 #include <linux/interrupt.h> 133 #include <linux/capability.h> 134 #include <linux/hrtimer.h> 135 #include <linux/freezer.h> 136 #include <linux/delay.h> 137 #include <linux/timer.h> 138 #include <linux/list.h> 139 #include <linux/init.h> 140 #include <linux/skbuff.h> 141 #include <linux/netdevice.h> 142 #include <linux/inet.h> 143 #include <linux/inetdevice.h> 144 #include <linux/rtnetlink.h> 145 #include <linux/if_arp.h> 146 #include <linux/if_vlan.h> 147 #include <linux/in.h> 148 #include <linux/ip.h> 149 #include <linux/ipv6.h> 150 #include <linux/udp.h> 151 #include <linux/proc_fs.h> 152 #include <linux/seq_file.h> 153 #include <linux/wait.h> 154 #include <linux/etherdevice.h> 155 #include <linux/kthread.h> 156 #include <net/net_namespace.h> 157 #include <net/checksum.h> 158 #include <net/ipv6.h> 159 #include <net/addrconf.h> 160 #ifdef CONFIG_XFRM 161 #include <net/xfrm.h> 162 #endif 163 #include <asm/byteorder.h> 164 #include <linux/rcupdate.h> 165 #include <linux/bitops.h> 166 #include <linux/io.h> 167 #include <linux/timex.h> 168 #include <linux/uaccess.h> 169 #include <asm/dma.h> 170 #include <asm/div64.h> /* do_div */ 171 172 #define VERSION "2.73" 173 #define IP_NAME_SZ 32 174 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */ 175 #define MPLS_STACK_BOTTOM htonl(0x00000100) 176 177 /* Device flag bits */ 178 #define F_IPSRC_RND (1<<0) /* IP-Src Random */ 179 #define F_IPDST_RND (1<<1) /* IP-Dst Random */ 180 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */ 181 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */ 182 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */ 183 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */ 184 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */ 185 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */ 186 #define F_MPLS_RND (1<<8) /* Random MPLS labels */ 187 #define F_VID_RND (1<<9) /* Random VLAN ID */ 188 #define F_SVID_RND (1<<10) /* Random SVLAN ID */ 189 #define F_FLOW_SEQ (1<<11) /* Sequential flows */ 190 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */ 191 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */ 192 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */ 193 #define F_NODE (1<<15) /* Node memory alloc*/ 194 195 /* Thread control flag bits */ 196 #define T_STOP (1<<0) /* Stop run */ 197 #define T_RUN (1<<1) /* Start run */ 198 #define T_REMDEVALL (1<<2) /* Remove all devs */ 199 #define T_REMDEV (1<<3) /* Remove one dev */ 200 201 /* If lock -- can be removed after some work */ 202 #define if_lock(t) spin_lock(&(t->if_lock)); 203 #define if_unlock(t) spin_unlock(&(t->if_lock)); 204 205 /* Used to help with determining the pkts on receive */ 206 #define PKTGEN_MAGIC 0xbe9be955 207 #define PG_PROC_DIR "pktgen" 208 #define PGCTRL "pgctrl" 209 static struct proc_dir_entry *pg_proc_dir; 210 211 #define MAX_CFLOWS 65536 212 213 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4) 214 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4) 215 216 struct flow_state { 217 __be32 cur_daddr; 218 int count; 219 #ifdef CONFIG_XFRM 220 struct xfrm_state *x; 221 #endif 222 __u32 flags; 223 }; 224 225 /* flow flag bits */ 226 #define F_INIT (1<<0) /* flow has been initialized */ 227 228 struct pktgen_dev { 229 /* 230 * Try to keep frequent/infrequent used vars. separated. 231 */ 232 struct proc_dir_entry *entry; /* proc file */ 233 struct pktgen_thread *pg_thread;/* the owner */ 234 struct list_head list; /* chaining in the thread's run-queue */ 235 236 int running; /* if false, the test will stop */ 237 238 /* If min != max, then we will either do a linear iteration, or 239 * we will do a random selection from within the range. 240 */ 241 __u32 flags; 242 int removal_mark; /* non-zero => the device is marked for 243 * removal by worker thread */ 244 245 int min_pkt_size; /* = ETH_ZLEN; */ 246 int max_pkt_size; /* = ETH_ZLEN; */ 247 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */ 248 int nfrags; 249 u64 delay; /* nano-seconds */ 250 251 __u64 count; /* Default No packets to send */ 252 __u64 sofar; /* How many pkts we've sent so far */ 253 __u64 tx_bytes; /* How many bytes we've transmitted */ 254 __u64 errors; /* Errors when trying to transmit, */ 255 256 /* runtime counters relating to clone_skb */ 257 258 __u64 allocated_skbs; 259 __u32 clone_count; 260 int last_ok; /* Was last skb sent? 261 * Or a failed transmit of some sort? 262 * This will keep sequence numbers in order 263 */ 264 ktime_t next_tx; 265 ktime_t started_at; 266 ktime_t stopped_at; 267 u64 idle_acc; /* nano-seconds */ 268 269 __u32 seq_num; 270 271 int clone_skb; /* 272 * Use multiple SKBs during packet gen. 273 * If this number is greater than 1, then 274 * that many copies of the same packet will be 275 * sent before a new packet is allocated. 276 * If you want to send 1024 identical packets 277 * before creating a new packet, 278 * set clone_skb to 1024. 279 */ 280 281 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 282 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 283 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 284 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 285 286 struct in6_addr in6_saddr; 287 struct in6_addr in6_daddr; 288 struct in6_addr cur_in6_daddr; 289 struct in6_addr cur_in6_saddr; 290 /* For ranges */ 291 struct in6_addr min_in6_daddr; 292 struct in6_addr max_in6_daddr; 293 struct in6_addr min_in6_saddr; 294 struct in6_addr max_in6_saddr; 295 296 /* If we're doing ranges, random or incremental, then this 297 * defines the min/max for those ranges. 298 */ 299 __be32 saddr_min; /* inclusive, source IP address */ 300 __be32 saddr_max; /* exclusive, source IP address */ 301 __be32 daddr_min; /* inclusive, dest IP address */ 302 __be32 daddr_max; /* exclusive, dest IP address */ 303 304 __u16 udp_src_min; /* inclusive, source UDP port */ 305 __u16 udp_src_max; /* exclusive, source UDP port */ 306 __u16 udp_dst_min; /* inclusive, dest UDP port */ 307 __u16 udp_dst_max; /* exclusive, dest UDP port */ 308 309 /* DSCP + ECN */ 310 __u8 tos; /* six MSB of (former) IPv4 TOS 311 are for dscp codepoint */ 312 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 313 (see RFC 3260, sec. 4) */ 314 315 /* MPLS */ 316 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */ 317 __be32 labels[MAX_MPLS_LABELS]; 318 319 /* VLAN/SVLAN (802.1Q/Q-in-Q) */ 320 __u8 vlan_p; 321 __u8 vlan_cfi; 322 __u16 vlan_id; /* 0xffff means no vlan tag */ 323 324 __u8 svlan_p; 325 __u8 svlan_cfi; 326 __u16 svlan_id; /* 0xffff means no svlan tag */ 327 328 __u32 src_mac_count; /* How many MACs to iterate through */ 329 __u32 dst_mac_count; /* How many MACs to iterate through */ 330 331 unsigned char dst_mac[ETH_ALEN]; 332 unsigned char src_mac[ETH_ALEN]; 333 334 __u32 cur_dst_mac_offset; 335 __u32 cur_src_mac_offset; 336 __be32 cur_saddr; 337 __be32 cur_daddr; 338 __u16 ip_id; 339 __u16 cur_udp_dst; 340 __u16 cur_udp_src; 341 __u16 cur_queue_map; 342 __u32 cur_pkt_size; 343 __u32 last_pkt_size; 344 345 __u8 hh[14]; 346 /* = { 347 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, 348 349 We fill in SRC address later 350 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 351 0x08, 0x00 352 }; 353 */ 354 __u16 pad; /* pad out the hh struct to an even 16 bytes */ 355 356 struct sk_buff *skb; /* skb we are to transmit next, used for when we 357 * are transmitting the same one multiple times 358 */ 359 struct net_device *odev; /* The out-going device. 360 * Note that the device should have it's 361 * pg_info pointer pointing back to this 362 * device. 363 * Set when the user specifies the out-going 364 * device name (not when the inject is 365 * started as it used to do.) 366 */ 367 char odevname[32]; 368 struct flow_state *flows; 369 unsigned cflows; /* Concurrent flows (config) */ 370 unsigned lflow; /* Flow length (config) */ 371 unsigned nflows; /* accumulated flows (stats) */ 372 unsigned curfl; /* current sequenced flow (state)*/ 373 374 u16 queue_map_min; 375 u16 queue_map_max; 376 int node; /* Memory node */ 377 378 #ifdef CONFIG_XFRM 379 __u8 ipsmode; /* IPSEC mode (config) */ 380 __u8 ipsproto; /* IPSEC type (config) */ 381 #endif 382 char result[512]; 383 }; 384 385 struct pktgen_hdr { 386 __be32 pgh_magic; 387 __be32 seq_num; 388 __be32 tv_sec; 389 __be32 tv_usec; 390 }; 391 392 struct pktgen_thread { 393 spinlock_t if_lock; /* for list of devices */ 394 struct list_head if_list; /* All device here */ 395 struct list_head th_list; 396 struct task_struct *tsk; 397 char result[512]; 398 399 /* Field for thread to receive "posted" events terminate, 400 stop ifs etc. */ 401 402 u32 control; 403 int cpu; 404 405 wait_queue_head_t queue; 406 struct completion start_done; 407 }; 408 409 #define REMOVE 1 410 #define FIND 0 411 412 static inline ktime_t ktime_now(void) 413 { 414 struct timespec ts; 415 ktime_get_ts(&ts); 416 417 return timespec_to_ktime(ts); 418 } 419 420 /* This works even if 32 bit because of careful byte order choice */ 421 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2) 422 { 423 return cmp1.tv64 < cmp2.tv64; 424 } 425 426 static const char version[] = 427 "pktgen " VERSION ": Packet Generator for packet performance testing.\n"; 428 429 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i); 430 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname); 431 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 432 const char *ifname, bool exact); 433 static int pktgen_device_event(struct notifier_block *, unsigned long, void *); 434 static void pktgen_run_all_threads(void); 435 static void pktgen_reset_all_threads(void); 436 static void pktgen_stop_all_threads_ifs(void); 437 438 static void pktgen_stop(struct pktgen_thread *t); 439 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); 440 441 static unsigned int scan_ip6(const char *s, char ip[16]); 442 static unsigned int fmt_ip6(char *s, const char ip[16]); 443 444 /* Module parameters, defaults. */ 445 static int pg_count_d __read_mostly = 1000; 446 static int pg_delay_d __read_mostly; 447 static int pg_clone_skb_d __read_mostly; 448 static int debug __read_mostly; 449 450 static DEFINE_MUTEX(pktgen_thread_lock); 451 static LIST_HEAD(pktgen_threads); 452 453 static struct notifier_block pktgen_notifier_block = { 454 .notifier_call = pktgen_device_event, 455 }; 456 457 /* 458 * /proc handling functions 459 * 460 */ 461 462 static int pgctrl_show(struct seq_file *seq, void *v) 463 { 464 seq_puts(seq, version); 465 return 0; 466 } 467 468 static ssize_t pgctrl_write(struct file *file, const char __user *buf, 469 size_t count, loff_t *ppos) 470 { 471 int err = 0; 472 char data[128]; 473 474 if (!capable(CAP_NET_ADMIN)) { 475 err = -EPERM; 476 goto out; 477 } 478 479 if (count > sizeof(data)) 480 count = sizeof(data); 481 482 if (copy_from_user(data, buf, count)) { 483 err = -EFAULT; 484 goto out; 485 } 486 data[count - 1] = 0; /* Make string */ 487 488 if (!strcmp(data, "stop")) 489 pktgen_stop_all_threads_ifs(); 490 491 else if (!strcmp(data, "start")) 492 pktgen_run_all_threads(); 493 494 else if (!strcmp(data, "reset")) 495 pktgen_reset_all_threads(); 496 497 else 498 printk(KERN_WARNING "pktgen: Unknown command: %s\n", data); 499 500 err = count; 501 502 out: 503 return err; 504 } 505 506 static int pgctrl_open(struct inode *inode, struct file *file) 507 { 508 return single_open(file, pgctrl_show, PDE(inode)->data); 509 } 510 511 static const struct file_operations pktgen_fops = { 512 .owner = THIS_MODULE, 513 .open = pgctrl_open, 514 .read = seq_read, 515 .llseek = seq_lseek, 516 .write = pgctrl_write, 517 .release = single_release, 518 }; 519 520 static int pktgen_if_show(struct seq_file *seq, void *v) 521 { 522 const struct pktgen_dev *pkt_dev = seq->private; 523 ktime_t stopped; 524 u64 idle; 525 526 seq_printf(seq, 527 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", 528 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, 529 pkt_dev->max_pkt_size); 530 531 seq_printf(seq, 532 " frags: %d delay: %llu clone_skb: %d ifname: %s\n", 533 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay, 534 pkt_dev->clone_skb, pkt_dev->odevname); 535 536 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, 537 pkt_dev->lflow); 538 539 seq_printf(seq, 540 " queue_map_min: %u queue_map_max: %u\n", 541 pkt_dev->queue_map_min, 542 pkt_dev->queue_map_max); 543 544 if (pkt_dev->flags & F_IPV6) { 545 char b1[128], b2[128], b3[128]; 546 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr); 547 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr); 548 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr); 549 seq_printf(seq, 550 " saddr: %s min_saddr: %s max_saddr: %s\n", b1, 551 b2, b3); 552 553 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr); 554 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr); 555 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr); 556 seq_printf(seq, 557 " daddr: %s min_daddr: %s max_daddr: %s\n", b1, 558 b2, b3); 559 560 } else { 561 seq_printf(seq, 562 " dst_min: %s dst_max: %s\n", 563 pkt_dev->dst_min, pkt_dev->dst_max); 564 seq_printf(seq, 565 " src_min: %s src_max: %s\n", 566 pkt_dev->src_min, pkt_dev->src_max); 567 } 568 569 seq_puts(seq, " src_mac: "); 570 571 seq_printf(seq, "%pM ", 572 is_zero_ether_addr(pkt_dev->src_mac) ? 573 pkt_dev->odev->dev_addr : pkt_dev->src_mac); 574 575 seq_printf(seq, "dst_mac: "); 576 seq_printf(seq, "%pM\n", pkt_dev->dst_mac); 577 578 seq_printf(seq, 579 " udp_src_min: %d udp_src_max: %d" 580 " udp_dst_min: %d udp_dst_max: %d\n", 581 pkt_dev->udp_src_min, pkt_dev->udp_src_max, 582 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); 583 584 seq_printf(seq, 585 " src_mac_count: %d dst_mac_count: %d\n", 586 pkt_dev->src_mac_count, pkt_dev->dst_mac_count); 587 588 if (pkt_dev->nr_labels) { 589 unsigned i; 590 seq_printf(seq, " mpls: "); 591 for (i = 0; i < pkt_dev->nr_labels; i++) 592 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), 593 i == pkt_dev->nr_labels-1 ? "\n" : ", "); 594 } 595 596 if (pkt_dev->vlan_id != 0xffff) 597 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", 598 pkt_dev->vlan_id, pkt_dev->vlan_p, 599 pkt_dev->vlan_cfi); 600 601 if (pkt_dev->svlan_id != 0xffff) 602 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", 603 pkt_dev->svlan_id, pkt_dev->svlan_p, 604 pkt_dev->svlan_cfi); 605 606 if (pkt_dev->tos) 607 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); 608 609 if (pkt_dev->traffic_class) 610 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); 611 612 if (pkt_dev->node >= 0) 613 seq_printf(seq, " node: %d\n", pkt_dev->node); 614 615 seq_printf(seq, " Flags: "); 616 617 if (pkt_dev->flags & F_IPV6) 618 seq_printf(seq, "IPV6 "); 619 620 if (pkt_dev->flags & F_IPSRC_RND) 621 seq_printf(seq, "IPSRC_RND "); 622 623 if (pkt_dev->flags & F_IPDST_RND) 624 seq_printf(seq, "IPDST_RND "); 625 626 if (pkt_dev->flags & F_TXSIZE_RND) 627 seq_printf(seq, "TXSIZE_RND "); 628 629 if (pkt_dev->flags & F_UDPSRC_RND) 630 seq_printf(seq, "UDPSRC_RND "); 631 632 if (pkt_dev->flags & F_UDPDST_RND) 633 seq_printf(seq, "UDPDST_RND "); 634 635 if (pkt_dev->flags & F_MPLS_RND) 636 seq_printf(seq, "MPLS_RND "); 637 638 if (pkt_dev->flags & F_QUEUE_MAP_RND) 639 seq_printf(seq, "QUEUE_MAP_RND "); 640 641 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 642 seq_printf(seq, "QUEUE_MAP_CPU "); 643 644 if (pkt_dev->cflows) { 645 if (pkt_dev->flags & F_FLOW_SEQ) 646 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/ 647 else 648 seq_printf(seq, "FLOW_RND "); 649 } 650 651 #ifdef CONFIG_XFRM 652 if (pkt_dev->flags & F_IPSEC_ON) 653 seq_printf(seq, "IPSEC "); 654 #endif 655 656 if (pkt_dev->flags & F_MACSRC_RND) 657 seq_printf(seq, "MACSRC_RND "); 658 659 if (pkt_dev->flags & F_MACDST_RND) 660 seq_printf(seq, "MACDST_RND "); 661 662 if (pkt_dev->flags & F_VID_RND) 663 seq_printf(seq, "VID_RND "); 664 665 if (pkt_dev->flags & F_SVID_RND) 666 seq_printf(seq, "SVID_RND "); 667 668 if (pkt_dev->flags & F_NODE) 669 seq_printf(seq, "NODE_ALLOC "); 670 671 seq_puts(seq, "\n"); 672 673 /* not really stopped, more like last-running-at */ 674 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at; 675 idle = pkt_dev->idle_acc; 676 do_div(idle, NSEC_PER_USEC); 677 678 seq_printf(seq, 679 "Current:\n pkts-sofar: %llu errors: %llu\n", 680 (unsigned long long)pkt_dev->sofar, 681 (unsigned long long)pkt_dev->errors); 682 683 seq_printf(seq, 684 " started: %lluus stopped: %lluus idle: %lluus\n", 685 (unsigned long long) ktime_to_us(pkt_dev->started_at), 686 (unsigned long long) ktime_to_us(stopped), 687 (unsigned long long) idle); 688 689 seq_printf(seq, 690 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 691 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, 692 pkt_dev->cur_src_mac_offset); 693 694 if (pkt_dev->flags & F_IPV6) { 695 char b1[128], b2[128]; 696 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr); 697 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr); 698 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1); 699 } else 700 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n", 701 pkt_dev->cur_saddr, pkt_dev->cur_daddr); 702 703 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", 704 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 705 706 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); 707 708 seq_printf(seq, " flows: %u\n", pkt_dev->nflows); 709 710 if (pkt_dev->result[0]) 711 seq_printf(seq, "Result: %s\n", pkt_dev->result); 712 else 713 seq_printf(seq, "Result: Idle\n"); 714 715 return 0; 716 } 717 718 719 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, 720 __u32 *num) 721 { 722 int i = 0; 723 *num = 0; 724 725 for (; i < maxlen; i++) { 726 char c; 727 *num <<= 4; 728 if (get_user(c, &user_buffer[i])) 729 return -EFAULT; 730 if ((c >= '0') && (c <= '9')) 731 *num |= c - '0'; 732 else if ((c >= 'a') && (c <= 'f')) 733 *num |= c - 'a' + 10; 734 else if ((c >= 'A') && (c <= 'F')) 735 *num |= c - 'A' + 10; 736 else 737 break; 738 } 739 return i; 740 } 741 742 static int count_trail_chars(const char __user * user_buffer, 743 unsigned int maxlen) 744 { 745 int i; 746 747 for (i = 0; i < maxlen; i++) { 748 char c; 749 if (get_user(c, &user_buffer[i])) 750 return -EFAULT; 751 switch (c) { 752 case '\"': 753 case '\n': 754 case '\r': 755 case '\t': 756 case ' ': 757 case '=': 758 break; 759 default: 760 goto done; 761 } 762 } 763 done: 764 return i; 765 } 766 767 static unsigned long num_arg(const char __user * user_buffer, 768 unsigned long maxlen, unsigned long *num) 769 { 770 int i = 0; 771 *num = 0; 772 773 for (; i < maxlen; i++) { 774 char c; 775 if (get_user(c, &user_buffer[i])) 776 return -EFAULT; 777 if ((c >= '0') && (c <= '9')) { 778 *num *= 10; 779 *num += c - '0'; 780 } else 781 break; 782 } 783 return i; 784 } 785 786 static int strn_len(const char __user * user_buffer, unsigned int maxlen) 787 { 788 int i = 0; 789 790 for (; i < maxlen; i++) { 791 char c; 792 if (get_user(c, &user_buffer[i])) 793 return -EFAULT; 794 switch (c) { 795 case '\"': 796 case '\n': 797 case '\r': 798 case '\t': 799 case ' ': 800 goto done_str; 801 break; 802 default: 803 break; 804 } 805 } 806 done_str: 807 return i; 808 } 809 810 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) 811 { 812 unsigned n = 0; 813 char c; 814 ssize_t i = 0; 815 int len; 816 817 pkt_dev->nr_labels = 0; 818 do { 819 __u32 tmp; 820 len = hex32_arg(&buffer[i], 8, &tmp); 821 if (len <= 0) 822 return len; 823 pkt_dev->labels[n] = htonl(tmp); 824 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 825 pkt_dev->flags |= F_MPLS_RND; 826 i += len; 827 if (get_user(c, &buffer[i])) 828 return -EFAULT; 829 i++; 830 n++; 831 if (n >= MAX_MPLS_LABELS) 832 return -E2BIG; 833 } while (c == ','); 834 835 pkt_dev->nr_labels = n; 836 return i; 837 } 838 839 static ssize_t pktgen_if_write(struct file *file, 840 const char __user * user_buffer, size_t count, 841 loff_t * offset) 842 { 843 struct seq_file *seq = (struct seq_file *)file->private_data; 844 struct pktgen_dev *pkt_dev = seq->private; 845 int i = 0, max, len; 846 char name[16], valstr[32]; 847 unsigned long value = 0; 848 char *pg_result = NULL; 849 int tmp = 0; 850 char buf[128]; 851 852 pg_result = &(pkt_dev->result[0]); 853 854 if (count < 1) { 855 printk(KERN_WARNING "pktgen: wrong command format\n"); 856 return -EINVAL; 857 } 858 859 max = count - i; 860 tmp = count_trail_chars(&user_buffer[i], max); 861 if (tmp < 0) { 862 printk(KERN_WARNING "pktgen: illegal format\n"); 863 return tmp; 864 } 865 i += tmp; 866 867 /* Read variable name */ 868 869 len = strn_len(&user_buffer[i], sizeof(name) - 1); 870 if (len < 0) 871 return len; 872 873 memset(name, 0, sizeof(name)); 874 if (copy_from_user(name, &user_buffer[i], len)) 875 return -EFAULT; 876 i += len; 877 878 max = count - i; 879 len = count_trail_chars(&user_buffer[i], max); 880 if (len < 0) 881 return len; 882 883 i += len; 884 885 if (debug) { 886 char tb[count + 1]; 887 if (copy_from_user(tb, user_buffer, count)) 888 return -EFAULT; 889 tb[count] = 0; 890 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name, 891 (unsigned long)count, tb); 892 } 893 894 if (!strcmp(name, "min_pkt_size")) { 895 len = num_arg(&user_buffer[i], 10, &value); 896 if (len < 0) 897 return len; 898 899 i += len; 900 if (value < 14 + 20 + 8) 901 value = 14 + 20 + 8; 902 if (value != pkt_dev->min_pkt_size) { 903 pkt_dev->min_pkt_size = value; 904 pkt_dev->cur_pkt_size = value; 905 } 906 sprintf(pg_result, "OK: min_pkt_size=%u", 907 pkt_dev->min_pkt_size); 908 return count; 909 } 910 911 if (!strcmp(name, "max_pkt_size")) { 912 len = num_arg(&user_buffer[i], 10, &value); 913 if (len < 0) 914 return len; 915 916 i += len; 917 if (value < 14 + 20 + 8) 918 value = 14 + 20 + 8; 919 if (value != pkt_dev->max_pkt_size) { 920 pkt_dev->max_pkt_size = value; 921 pkt_dev->cur_pkt_size = value; 922 } 923 sprintf(pg_result, "OK: max_pkt_size=%u", 924 pkt_dev->max_pkt_size); 925 return count; 926 } 927 928 /* Shortcut for min = max */ 929 930 if (!strcmp(name, "pkt_size")) { 931 len = num_arg(&user_buffer[i], 10, &value); 932 if (len < 0) 933 return len; 934 935 i += len; 936 if (value < 14 + 20 + 8) 937 value = 14 + 20 + 8; 938 if (value != pkt_dev->min_pkt_size) { 939 pkt_dev->min_pkt_size = value; 940 pkt_dev->max_pkt_size = value; 941 pkt_dev->cur_pkt_size = value; 942 } 943 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 944 return count; 945 } 946 947 if (!strcmp(name, "debug")) { 948 len = num_arg(&user_buffer[i], 10, &value); 949 if (len < 0) 950 return len; 951 952 i += len; 953 debug = value; 954 sprintf(pg_result, "OK: debug=%u", debug); 955 return count; 956 } 957 958 if (!strcmp(name, "frags")) { 959 len = num_arg(&user_buffer[i], 10, &value); 960 if (len < 0) 961 return len; 962 963 i += len; 964 pkt_dev->nfrags = value; 965 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 966 return count; 967 } 968 if (!strcmp(name, "delay")) { 969 len = num_arg(&user_buffer[i], 10, &value); 970 if (len < 0) 971 return len; 972 973 i += len; 974 if (value == 0x7FFFFFFF) 975 pkt_dev->delay = ULLONG_MAX; 976 else 977 pkt_dev->delay = (u64)value; 978 979 sprintf(pg_result, "OK: delay=%llu", 980 (unsigned long long) pkt_dev->delay); 981 return count; 982 } 983 if (!strcmp(name, "udp_src_min")) { 984 len = num_arg(&user_buffer[i], 10, &value); 985 if (len < 0) 986 return len; 987 988 i += len; 989 if (value != pkt_dev->udp_src_min) { 990 pkt_dev->udp_src_min = value; 991 pkt_dev->cur_udp_src = value; 992 } 993 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 994 return count; 995 } 996 if (!strcmp(name, "udp_dst_min")) { 997 len = num_arg(&user_buffer[i], 10, &value); 998 if (len < 0) 999 return len; 1000 1001 i += len; 1002 if (value != pkt_dev->udp_dst_min) { 1003 pkt_dev->udp_dst_min = value; 1004 pkt_dev->cur_udp_dst = value; 1005 } 1006 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 1007 return count; 1008 } 1009 if (!strcmp(name, "udp_src_max")) { 1010 len = num_arg(&user_buffer[i], 10, &value); 1011 if (len < 0) 1012 return len; 1013 1014 i += len; 1015 if (value != pkt_dev->udp_src_max) { 1016 pkt_dev->udp_src_max = value; 1017 pkt_dev->cur_udp_src = value; 1018 } 1019 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 1020 return count; 1021 } 1022 if (!strcmp(name, "udp_dst_max")) { 1023 len = num_arg(&user_buffer[i], 10, &value); 1024 if (len < 0) 1025 return len; 1026 1027 i += len; 1028 if (value != pkt_dev->udp_dst_max) { 1029 pkt_dev->udp_dst_max = value; 1030 pkt_dev->cur_udp_dst = value; 1031 } 1032 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1033 return count; 1034 } 1035 if (!strcmp(name, "clone_skb")) { 1036 len = num_arg(&user_buffer[i], 10, &value); 1037 if (len < 0) 1038 return len; 1039 1040 i += len; 1041 pkt_dev->clone_skb = value; 1042 1043 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1044 return count; 1045 } 1046 if (!strcmp(name, "count")) { 1047 len = num_arg(&user_buffer[i], 10, &value); 1048 if (len < 0) 1049 return len; 1050 1051 i += len; 1052 pkt_dev->count = value; 1053 sprintf(pg_result, "OK: count=%llu", 1054 (unsigned long long)pkt_dev->count); 1055 return count; 1056 } 1057 if (!strcmp(name, "src_mac_count")) { 1058 len = num_arg(&user_buffer[i], 10, &value); 1059 if (len < 0) 1060 return len; 1061 1062 i += len; 1063 if (pkt_dev->src_mac_count != value) { 1064 pkt_dev->src_mac_count = value; 1065 pkt_dev->cur_src_mac_offset = 0; 1066 } 1067 sprintf(pg_result, "OK: src_mac_count=%d", 1068 pkt_dev->src_mac_count); 1069 return count; 1070 } 1071 if (!strcmp(name, "dst_mac_count")) { 1072 len = num_arg(&user_buffer[i], 10, &value); 1073 if (len < 0) 1074 return len; 1075 1076 i += len; 1077 if (pkt_dev->dst_mac_count != value) { 1078 pkt_dev->dst_mac_count = value; 1079 pkt_dev->cur_dst_mac_offset = 0; 1080 } 1081 sprintf(pg_result, "OK: dst_mac_count=%d", 1082 pkt_dev->dst_mac_count); 1083 return count; 1084 } 1085 if (!strcmp(name, "node")) { 1086 len = num_arg(&user_buffer[i], 10, &value); 1087 if (len < 0) 1088 return len; 1089 1090 i += len; 1091 1092 if (node_possible(value)) { 1093 pkt_dev->node = value; 1094 sprintf(pg_result, "OK: node=%d", pkt_dev->node); 1095 } 1096 else 1097 sprintf(pg_result, "ERROR: node not possible"); 1098 return count; 1099 } 1100 if (!strcmp(name, "flag")) { 1101 char f[32]; 1102 memset(f, 0, 32); 1103 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1104 if (len < 0) 1105 return len; 1106 1107 if (copy_from_user(f, &user_buffer[i], len)) 1108 return -EFAULT; 1109 i += len; 1110 if (strcmp(f, "IPSRC_RND") == 0) 1111 pkt_dev->flags |= F_IPSRC_RND; 1112 1113 else if (strcmp(f, "!IPSRC_RND") == 0) 1114 pkt_dev->flags &= ~F_IPSRC_RND; 1115 1116 else if (strcmp(f, "TXSIZE_RND") == 0) 1117 pkt_dev->flags |= F_TXSIZE_RND; 1118 1119 else if (strcmp(f, "!TXSIZE_RND") == 0) 1120 pkt_dev->flags &= ~F_TXSIZE_RND; 1121 1122 else if (strcmp(f, "IPDST_RND") == 0) 1123 pkt_dev->flags |= F_IPDST_RND; 1124 1125 else if (strcmp(f, "!IPDST_RND") == 0) 1126 pkt_dev->flags &= ~F_IPDST_RND; 1127 1128 else if (strcmp(f, "UDPSRC_RND") == 0) 1129 pkt_dev->flags |= F_UDPSRC_RND; 1130 1131 else if (strcmp(f, "!UDPSRC_RND") == 0) 1132 pkt_dev->flags &= ~F_UDPSRC_RND; 1133 1134 else if (strcmp(f, "UDPDST_RND") == 0) 1135 pkt_dev->flags |= F_UDPDST_RND; 1136 1137 else if (strcmp(f, "!UDPDST_RND") == 0) 1138 pkt_dev->flags &= ~F_UDPDST_RND; 1139 1140 else if (strcmp(f, "MACSRC_RND") == 0) 1141 pkt_dev->flags |= F_MACSRC_RND; 1142 1143 else if (strcmp(f, "!MACSRC_RND") == 0) 1144 pkt_dev->flags &= ~F_MACSRC_RND; 1145 1146 else if (strcmp(f, "MACDST_RND") == 0) 1147 pkt_dev->flags |= F_MACDST_RND; 1148 1149 else if (strcmp(f, "!MACDST_RND") == 0) 1150 pkt_dev->flags &= ~F_MACDST_RND; 1151 1152 else if (strcmp(f, "MPLS_RND") == 0) 1153 pkt_dev->flags |= F_MPLS_RND; 1154 1155 else if (strcmp(f, "!MPLS_RND") == 0) 1156 pkt_dev->flags &= ~F_MPLS_RND; 1157 1158 else if (strcmp(f, "VID_RND") == 0) 1159 pkt_dev->flags |= F_VID_RND; 1160 1161 else if (strcmp(f, "!VID_RND") == 0) 1162 pkt_dev->flags &= ~F_VID_RND; 1163 1164 else if (strcmp(f, "SVID_RND") == 0) 1165 pkt_dev->flags |= F_SVID_RND; 1166 1167 else if (strcmp(f, "!SVID_RND") == 0) 1168 pkt_dev->flags &= ~F_SVID_RND; 1169 1170 else if (strcmp(f, "FLOW_SEQ") == 0) 1171 pkt_dev->flags |= F_FLOW_SEQ; 1172 1173 else if (strcmp(f, "QUEUE_MAP_RND") == 0) 1174 pkt_dev->flags |= F_QUEUE_MAP_RND; 1175 1176 else if (strcmp(f, "!QUEUE_MAP_RND") == 0) 1177 pkt_dev->flags &= ~F_QUEUE_MAP_RND; 1178 1179 else if (strcmp(f, "QUEUE_MAP_CPU") == 0) 1180 pkt_dev->flags |= F_QUEUE_MAP_CPU; 1181 1182 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0) 1183 pkt_dev->flags &= ~F_QUEUE_MAP_CPU; 1184 #ifdef CONFIG_XFRM 1185 else if (strcmp(f, "IPSEC") == 0) 1186 pkt_dev->flags |= F_IPSEC_ON; 1187 #endif 1188 1189 else if (strcmp(f, "!IPV6") == 0) 1190 pkt_dev->flags &= ~F_IPV6; 1191 1192 else if (strcmp(f, "NODE_ALLOC") == 0) 1193 pkt_dev->flags |= F_NODE; 1194 1195 else if (strcmp(f, "!NODE_ALLOC") == 0) 1196 pkt_dev->flags &= ~F_NODE; 1197 1198 else { 1199 sprintf(pg_result, 1200 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1201 f, 1202 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1203 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n"); 1204 return count; 1205 } 1206 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1207 return count; 1208 } 1209 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1210 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1211 if (len < 0) 1212 return len; 1213 1214 if (copy_from_user(buf, &user_buffer[i], len)) 1215 return -EFAULT; 1216 buf[len] = 0; 1217 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1218 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1219 strncpy(pkt_dev->dst_min, buf, len); 1220 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1221 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1222 } 1223 if (debug) 1224 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n", 1225 pkt_dev->dst_min); 1226 i += len; 1227 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1228 return count; 1229 } 1230 if (!strcmp(name, "dst_max")) { 1231 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1232 if (len < 0) 1233 return len; 1234 1235 1236 if (copy_from_user(buf, &user_buffer[i], len)) 1237 return -EFAULT; 1238 1239 buf[len] = 0; 1240 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1241 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1242 strncpy(pkt_dev->dst_max, buf, len); 1243 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1244 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1245 } 1246 if (debug) 1247 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n", 1248 pkt_dev->dst_max); 1249 i += len; 1250 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1251 return count; 1252 } 1253 if (!strcmp(name, "dst6")) { 1254 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1255 if (len < 0) 1256 return len; 1257 1258 pkt_dev->flags |= F_IPV6; 1259 1260 if (copy_from_user(buf, &user_buffer[i], len)) 1261 return -EFAULT; 1262 buf[len] = 0; 1263 1264 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1265 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1266 1267 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr); 1268 1269 if (debug) 1270 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf); 1271 1272 i += len; 1273 sprintf(pg_result, "OK: dst6=%s", buf); 1274 return count; 1275 } 1276 if (!strcmp(name, "dst6_min")) { 1277 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1278 if (len < 0) 1279 return len; 1280 1281 pkt_dev->flags |= F_IPV6; 1282 1283 if (copy_from_user(buf, &user_buffer[i], len)) 1284 return -EFAULT; 1285 buf[len] = 0; 1286 1287 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1288 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1289 1290 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, 1291 &pkt_dev->min_in6_daddr); 1292 if (debug) 1293 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf); 1294 1295 i += len; 1296 sprintf(pg_result, "OK: dst6_min=%s", buf); 1297 return count; 1298 } 1299 if (!strcmp(name, "dst6_max")) { 1300 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1301 if (len < 0) 1302 return len; 1303 1304 pkt_dev->flags |= F_IPV6; 1305 1306 if (copy_from_user(buf, &user_buffer[i], len)) 1307 return -EFAULT; 1308 buf[len] = 0; 1309 1310 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1311 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1312 1313 if (debug) 1314 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf); 1315 1316 i += len; 1317 sprintf(pg_result, "OK: dst6_max=%s", buf); 1318 return count; 1319 } 1320 if (!strcmp(name, "src6")) { 1321 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1322 if (len < 0) 1323 return len; 1324 1325 pkt_dev->flags |= F_IPV6; 1326 1327 if (copy_from_user(buf, &user_buffer[i], len)) 1328 return -EFAULT; 1329 buf[len] = 0; 1330 1331 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1332 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1333 1334 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr); 1335 1336 if (debug) 1337 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf); 1338 1339 i += len; 1340 sprintf(pg_result, "OK: src6=%s", buf); 1341 return count; 1342 } 1343 if (!strcmp(name, "src_min")) { 1344 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1345 if (len < 0) 1346 return len; 1347 1348 if (copy_from_user(buf, &user_buffer[i], len)) 1349 return -EFAULT; 1350 buf[len] = 0; 1351 if (strcmp(buf, pkt_dev->src_min) != 0) { 1352 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1353 strncpy(pkt_dev->src_min, buf, len); 1354 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1355 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1356 } 1357 if (debug) 1358 printk(KERN_DEBUG "pktgen: src_min set to: %s\n", 1359 pkt_dev->src_min); 1360 i += len; 1361 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1362 return count; 1363 } 1364 if (!strcmp(name, "src_max")) { 1365 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1366 if (len < 0) 1367 return len; 1368 1369 if (copy_from_user(buf, &user_buffer[i], len)) 1370 return -EFAULT; 1371 buf[len] = 0; 1372 if (strcmp(buf, pkt_dev->src_max) != 0) { 1373 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1374 strncpy(pkt_dev->src_max, buf, len); 1375 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1376 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1377 } 1378 if (debug) 1379 printk(KERN_DEBUG "pktgen: src_max set to: %s\n", 1380 pkt_dev->src_max); 1381 i += len; 1382 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1383 return count; 1384 } 1385 if (!strcmp(name, "dst_mac")) { 1386 char *v = valstr; 1387 unsigned char old_dmac[ETH_ALEN]; 1388 unsigned char *m = pkt_dev->dst_mac; 1389 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN); 1390 1391 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1392 if (len < 0) 1393 return len; 1394 1395 memset(valstr, 0, sizeof(valstr)); 1396 if (copy_from_user(valstr, &user_buffer[i], len)) 1397 return -EFAULT; 1398 i += len; 1399 1400 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) { 1401 if (*v >= '0' && *v <= '9') { 1402 *m *= 16; 1403 *m += *v - '0'; 1404 } 1405 if (*v >= 'A' && *v <= 'F') { 1406 *m *= 16; 1407 *m += *v - 'A' + 10; 1408 } 1409 if (*v >= 'a' && *v <= 'f') { 1410 *m *= 16; 1411 *m += *v - 'a' + 10; 1412 } 1413 if (*v == ':') { 1414 m++; 1415 *m = 0; 1416 } 1417 } 1418 1419 /* Set up Dest MAC */ 1420 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac)) 1421 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 1422 1423 sprintf(pg_result, "OK: dstmac"); 1424 return count; 1425 } 1426 if (!strcmp(name, "src_mac")) { 1427 char *v = valstr; 1428 unsigned char old_smac[ETH_ALEN]; 1429 unsigned char *m = pkt_dev->src_mac; 1430 1431 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN); 1432 1433 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1434 if (len < 0) 1435 return len; 1436 1437 memset(valstr, 0, sizeof(valstr)); 1438 if (copy_from_user(valstr, &user_buffer[i], len)) 1439 return -EFAULT; 1440 i += len; 1441 1442 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) { 1443 if (*v >= '0' && *v <= '9') { 1444 *m *= 16; 1445 *m += *v - '0'; 1446 } 1447 if (*v >= 'A' && *v <= 'F') { 1448 *m *= 16; 1449 *m += *v - 'A' + 10; 1450 } 1451 if (*v >= 'a' && *v <= 'f') { 1452 *m *= 16; 1453 *m += *v - 'a' + 10; 1454 } 1455 if (*v == ':') { 1456 m++; 1457 *m = 0; 1458 } 1459 } 1460 1461 /* Set up Src MAC */ 1462 if (compare_ether_addr(old_smac, pkt_dev->src_mac)) 1463 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN); 1464 1465 sprintf(pg_result, "OK: srcmac"); 1466 return count; 1467 } 1468 1469 if (!strcmp(name, "clear_counters")) { 1470 pktgen_clear_counters(pkt_dev); 1471 sprintf(pg_result, "OK: Clearing counters.\n"); 1472 return count; 1473 } 1474 1475 if (!strcmp(name, "flows")) { 1476 len = num_arg(&user_buffer[i], 10, &value); 1477 if (len < 0) 1478 return len; 1479 1480 i += len; 1481 if (value > MAX_CFLOWS) 1482 value = MAX_CFLOWS; 1483 1484 pkt_dev->cflows = value; 1485 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1486 return count; 1487 } 1488 1489 if (!strcmp(name, "flowlen")) { 1490 len = num_arg(&user_buffer[i], 10, &value); 1491 if (len < 0) 1492 return len; 1493 1494 i += len; 1495 pkt_dev->lflow = value; 1496 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1497 return count; 1498 } 1499 1500 if (!strcmp(name, "queue_map_min")) { 1501 len = num_arg(&user_buffer[i], 5, &value); 1502 if (len < 0) 1503 return len; 1504 1505 i += len; 1506 pkt_dev->queue_map_min = value; 1507 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1508 return count; 1509 } 1510 1511 if (!strcmp(name, "queue_map_max")) { 1512 len = num_arg(&user_buffer[i], 5, &value); 1513 if (len < 0) 1514 return len; 1515 1516 i += len; 1517 pkt_dev->queue_map_max = value; 1518 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1519 return count; 1520 } 1521 1522 if (!strcmp(name, "mpls")) { 1523 unsigned n, cnt; 1524 1525 len = get_labels(&user_buffer[i], pkt_dev); 1526 if (len < 0) 1527 return len; 1528 i += len; 1529 cnt = sprintf(pg_result, "OK: mpls="); 1530 for (n = 0; n < pkt_dev->nr_labels; n++) 1531 cnt += sprintf(pg_result + cnt, 1532 "%08x%s", ntohl(pkt_dev->labels[n]), 1533 n == pkt_dev->nr_labels-1 ? "" : ","); 1534 1535 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1536 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1537 pkt_dev->svlan_id = 0xffff; 1538 1539 if (debug) 1540 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n"); 1541 } 1542 return count; 1543 } 1544 1545 if (!strcmp(name, "vlan_id")) { 1546 len = num_arg(&user_buffer[i], 4, &value); 1547 if (len < 0) 1548 return len; 1549 1550 i += len; 1551 if (value <= 4095) { 1552 pkt_dev->vlan_id = value; /* turn on VLAN */ 1553 1554 if (debug) 1555 printk(KERN_DEBUG "pktgen: VLAN turned on\n"); 1556 1557 if (debug && pkt_dev->nr_labels) 1558 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1559 1560 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1561 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1562 } else { 1563 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1564 pkt_dev->svlan_id = 0xffff; 1565 1566 if (debug) 1567 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1568 } 1569 return count; 1570 } 1571 1572 if (!strcmp(name, "vlan_p")) { 1573 len = num_arg(&user_buffer[i], 1, &value); 1574 if (len < 0) 1575 return len; 1576 1577 i += len; 1578 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1579 pkt_dev->vlan_p = value; 1580 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1581 } else { 1582 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1583 } 1584 return count; 1585 } 1586 1587 if (!strcmp(name, "vlan_cfi")) { 1588 len = num_arg(&user_buffer[i], 1, &value); 1589 if (len < 0) 1590 return len; 1591 1592 i += len; 1593 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1594 pkt_dev->vlan_cfi = value; 1595 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1596 } else { 1597 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1598 } 1599 return count; 1600 } 1601 1602 if (!strcmp(name, "svlan_id")) { 1603 len = num_arg(&user_buffer[i], 4, &value); 1604 if (len < 0) 1605 return len; 1606 1607 i += len; 1608 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1609 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1610 1611 if (debug) 1612 printk(KERN_DEBUG "pktgen: SVLAN turned on\n"); 1613 1614 if (debug && pkt_dev->nr_labels) 1615 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1616 1617 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1618 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1619 } else { 1620 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1621 pkt_dev->svlan_id = 0xffff; 1622 1623 if (debug) 1624 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1625 } 1626 return count; 1627 } 1628 1629 if (!strcmp(name, "svlan_p")) { 1630 len = num_arg(&user_buffer[i], 1, &value); 1631 if (len < 0) 1632 return len; 1633 1634 i += len; 1635 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1636 pkt_dev->svlan_p = value; 1637 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1638 } else { 1639 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1640 } 1641 return count; 1642 } 1643 1644 if (!strcmp(name, "svlan_cfi")) { 1645 len = num_arg(&user_buffer[i], 1, &value); 1646 if (len < 0) 1647 return len; 1648 1649 i += len; 1650 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1651 pkt_dev->svlan_cfi = value; 1652 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1653 } else { 1654 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1655 } 1656 return count; 1657 } 1658 1659 if (!strcmp(name, "tos")) { 1660 __u32 tmp_value = 0; 1661 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1662 if (len < 0) 1663 return len; 1664 1665 i += len; 1666 if (len == 2) { 1667 pkt_dev->tos = tmp_value; 1668 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1669 } else { 1670 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1671 } 1672 return count; 1673 } 1674 1675 if (!strcmp(name, "traffic_class")) { 1676 __u32 tmp_value = 0; 1677 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1678 if (len < 0) 1679 return len; 1680 1681 i += len; 1682 if (len == 2) { 1683 pkt_dev->traffic_class = tmp_value; 1684 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1685 } else { 1686 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1687 } 1688 return count; 1689 } 1690 1691 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1692 return -EINVAL; 1693 } 1694 1695 static int pktgen_if_open(struct inode *inode, struct file *file) 1696 { 1697 return single_open(file, pktgen_if_show, PDE(inode)->data); 1698 } 1699 1700 static const struct file_operations pktgen_if_fops = { 1701 .owner = THIS_MODULE, 1702 .open = pktgen_if_open, 1703 .read = seq_read, 1704 .llseek = seq_lseek, 1705 .write = pktgen_if_write, 1706 .release = single_release, 1707 }; 1708 1709 static int pktgen_thread_show(struct seq_file *seq, void *v) 1710 { 1711 struct pktgen_thread *t = seq->private; 1712 const struct pktgen_dev *pkt_dev; 1713 1714 BUG_ON(!t); 1715 1716 seq_printf(seq, "Running: "); 1717 1718 if_lock(t); 1719 list_for_each_entry(pkt_dev, &t->if_list, list) 1720 if (pkt_dev->running) 1721 seq_printf(seq, "%s ", pkt_dev->odevname); 1722 1723 seq_printf(seq, "\nStopped: "); 1724 1725 list_for_each_entry(pkt_dev, &t->if_list, list) 1726 if (!pkt_dev->running) 1727 seq_printf(seq, "%s ", pkt_dev->odevname); 1728 1729 if (t->result[0]) 1730 seq_printf(seq, "\nResult: %s\n", t->result); 1731 else 1732 seq_printf(seq, "\nResult: NA\n"); 1733 1734 if_unlock(t); 1735 1736 return 0; 1737 } 1738 1739 static ssize_t pktgen_thread_write(struct file *file, 1740 const char __user * user_buffer, 1741 size_t count, loff_t * offset) 1742 { 1743 struct seq_file *seq = (struct seq_file *)file->private_data; 1744 struct pktgen_thread *t = seq->private; 1745 int i = 0, max, len, ret; 1746 char name[40]; 1747 char *pg_result; 1748 1749 if (count < 1) { 1750 // sprintf(pg_result, "Wrong command format"); 1751 return -EINVAL; 1752 } 1753 1754 max = count - i; 1755 len = count_trail_chars(&user_buffer[i], max); 1756 if (len < 0) 1757 return len; 1758 1759 i += len; 1760 1761 /* Read variable name */ 1762 1763 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1764 if (len < 0) 1765 return len; 1766 1767 memset(name, 0, sizeof(name)); 1768 if (copy_from_user(name, &user_buffer[i], len)) 1769 return -EFAULT; 1770 i += len; 1771 1772 max = count - i; 1773 len = count_trail_chars(&user_buffer[i], max); 1774 if (len < 0) 1775 return len; 1776 1777 i += len; 1778 1779 if (debug) 1780 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n", 1781 name, (unsigned long)count); 1782 1783 if (!t) { 1784 printk(KERN_ERR "pktgen: ERROR: No thread\n"); 1785 ret = -EINVAL; 1786 goto out; 1787 } 1788 1789 pg_result = &(t->result[0]); 1790 1791 if (!strcmp(name, "add_device")) { 1792 char f[32]; 1793 memset(f, 0, 32); 1794 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1795 if (len < 0) { 1796 ret = len; 1797 goto out; 1798 } 1799 if (copy_from_user(f, &user_buffer[i], len)) 1800 return -EFAULT; 1801 i += len; 1802 mutex_lock(&pktgen_thread_lock); 1803 pktgen_add_device(t, f); 1804 mutex_unlock(&pktgen_thread_lock); 1805 ret = count; 1806 sprintf(pg_result, "OK: add_device=%s", f); 1807 goto out; 1808 } 1809 1810 if (!strcmp(name, "rem_device_all")) { 1811 mutex_lock(&pktgen_thread_lock); 1812 t->control |= T_REMDEVALL; 1813 mutex_unlock(&pktgen_thread_lock); 1814 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1815 ret = count; 1816 sprintf(pg_result, "OK: rem_device_all"); 1817 goto out; 1818 } 1819 1820 if (!strcmp(name, "max_before_softirq")) { 1821 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1822 ret = count; 1823 goto out; 1824 } 1825 1826 ret = -EINVAL; 1827 out: 1828 return ret; 1829 } 1830 1831 static int pktgen_thread_open(struct inode *inode, struct file *file) 1832 { 1833 return single_open(file, pktgen_thread_show, PDE(inode)->data); 1834 } 1835 1836 static const struct file_operations pktgen_thread_fops = { 1837 .owner = THIS_MODULE, 1838 .open = pktgen_thread_open, 1839 .read = seq_read, 1840 .llseek = seq_lseek, 1841 .write = pktgen_thread_write, 1842 .release = single_release, 1843 }; 1844 1845 /* Think find or remove for NN */ 1846 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove) 1847 { 1848 struct pktgen_thread *t; 1849 struct pktgen_dev *pkt_dev = NULL; 1850 bool exact = (remove == FIND); 1851 1852 list_for_each_entry(t, &pktgen_threads, th_list) { 1853 pkt_dev = pktgen_find_dev(t, ifname, exact); 1854 if (pkt_dev) { 1855 if (remove) { 1856 if_lock(t); 1857 pkt_dev->removal_mark = 1; 1858 t->control |= T_REMDEV; 1859 if_unlock(t); 1860 } 1861 break; 1862 } 1863 } 1864 return pkt_dev; 1865 } 1866 1867 /* 1868 * mark a device for removal 1869 */ 1870 static void pktgen_mark_device(const char *ifname) 1871 { 1872 struct pktgen_dev *pkt_dev = NULL; 1873 const int max_tries = 10, msec_per_try = 125; 1874 int i = 0; 1875 1876 mutex_lock(&pktgen_thread_lock); 1877 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname); 1878 1879 while (1) { 1880 1881 pkt_dev = __pktgen_NN_threads(ifname, REMOVE); 1882 if (pkt_dev == NULL) 1883 break; /* success */ 1884 1885 mutex_unlock(&pktgen_thread_lock); 1886 pr_debug("pktgen: pktgen_mark_device waiting for %s " 1887 "to disappear....\n", ifname); 1888 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1889 mutex_lock(&pktgen_thread_lock); 1890 1891 if (++i >= max_tries) { 1892 printk(KERN_ERR "pktgen_mark_device: timed out after " 1893 "waiting %d msec for device %s to be removed\n", 1894 msec_per_try * i, ifname); 1895 break; 1896 } 1897 1898 } 1899 1900 mutex_unlock(&pktgen_thread_lock); 1901 } 1902 1903 static void pktgen_change_name(struct net_device *dev) 1904 { 1905 struct pktgen_thread *t; 1906 1907 list_for_each_entry(t, &pktgen_threads, th_list) { 1908 struct pktgen_dev *pkt_dev; 1909 1910 list_for_each_entry(pkt_dev, &t->if_list, list) { 1911 if (pkt_dev->odev != dev) 1912 continue; 1913 1914 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 1915 1916 pkt_dev->entry = proc_create_data(dev->name, 0600, 1917 pg_proc_dir, 1918 &pktgen_if_fops, 1919 pkt_dev); 1920 if (!pkt_dev->entry) 1921 printk(KERN_ERR "pktgen: can't move proc " 1922 " entry for '%s'\n", dev->name); 1923 break; 1924 } 1925 } 1926 } 1927 1928 static int pktgen_device_event(struct notifier_block *unused, 1929 unsigned long event, void *ptr) 1930 { 1931 struct net_device *dev = ptr; 1932 1933 if (!net_eq(dev_net(dev), &init_net)) 1934 return NOTIFY_DONE; 1935 1936 /* It is OK that we do not hold the group lock right now, 1937 * as we run under the RTNL lock. 1938 */ 1939 1940 switch (event) { 1941 case NETDEV_CHANGENAME: 1942 pktgen_change_name(dev); 1943 break; 1944 1945 case NETDEV_UNREGISTER: 1946 pktgen_mark_device(dev->name); 1947 break; 1948 } 1949 1950 return NOTIFY_DONE; 1951 } 1952 1953 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev, 1954 const char *ifname) 1955 { 1956 char b[IFNAMSIZ+5]; 1957 int i = 0; 1958 1959 for (i = 0; ifname[i] != '@'; i++) { 1960 if (i == IFNAMSIZ) 1961 break; 1962 1963 b[i] = ifname[i]; 1964 } 1965 b[i] = 0; 1966 1967 return dev_get_by_name(&init_net, b); 1968 } 1969 1970 1971 /* Associate pktgen_dev with a device. */ 1972 1973 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname) 1974 { 1975 struct net_device *odev; 1976 int err; 1977 1978 /* Clean old setups */ 1979 if (pkt_dev->odev) { 1980 dev_put(pkt_dev->odev); 1981 pkt_dev->odev = NULL; 1982 } 1983 1984 odev = pktgen_dev_get_by_name(pkt_dev, ifname); 1985 if (!odev) { 1986 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname); 1987 return -ENODEV; 1988 } 1989 1990 if (odev->type != ARPHRD_ETHER) { 1991 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname); 1992 err = -EINVAL; 1993 } else if (!netif_running(odev)) { 1994 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname); 1995 err = -ENETDOWN; 1996 } else { 1997 pkt_dev->odev = odev; 1998 return 0; 1999 } 2000 2001 dev_put(odev); 2002 return err; 2003 } 2004 2005 /* Read pkt_dev from the interface and set up internal pktgen_dev 2006 * structure to have the right information to create/send packets 2007 */ 2008 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 2009 { 2010 int ntxq; 2011 2012 if (!pkt_dev->odev) { 2013 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in " 2014 "setup_inject.\n"); 2015 sprintf(pkt_dev->result, 2016 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 2017 return; 2018 } 2019 2020 /* make sure that we don't pick a non-existing transmit queue */ 2021 ntxq = pkt_dev->odev->real_num_tx_queues; 2022 2023 if (ntxq <= pkt_dev->queue_map_min) { 2024 printk(KERN_WARNING "pktgen: WARNING: Requested " 2025 "queue_map_min (zero-based) (%d) exceeds valid range " 2026 "[0 - %d] for (%d) queues on %s, resetting\n", 2027 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, 2028 pkt_dev->odevname); 2029 pkt_dev->queue_map_min = ntxq - 1; 2030 } 2031 if (pkt_dev->queue_map_max >= ntxq) { 2032 printk(KERN_WARNING "pktgen: WARNING: Requested " 2033 "queue_map_max (zero-based) (%d) exceeds valid range " 2034 "[0 - %d] for (%d) queues on %s, resetting\n", 2035 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, 2036 pkt_dev->odevname); 2037 pkt_dev->queue_map_max = ntxq - 1; 2038 } 2039 2040 /* Default to the interface's mac if not explicitly set. */ 2041 2042 if (is_zero_ether_addr(pkt_dev->src_mac)) 2043 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN); 2044 2045 /* Set up Dest MAC */ 2046 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 2047 2048 /* Set up pkt size */ 2049 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2050 2051 if (pkt_dev->flags & F_IPV6) { 2052 /* 2053 * Skip this automatic address setting until locks or functions 2054 * gets exported 2055 */ 2056 2057 #ifdef NOTNOW 2058 int i, set = 0, err = 1; 2059 struct inet6_dev *idev; 2060 2061 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2062 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2063 set = 1; 2064 break; 2065 } 2066 2067 if (!set) { 2068 2069 /* 2070 * Use linklevel address if unconfigured. 2071 * 2072 * use ipv6_get_lladdr if/when it's get exported 2073 */ 2074 2075 rcu_read_lock(); 2076 idev = __in6_dev_get(pkt_dev->odev); 2077 if (idev) { 2078 struct inet6_ifaddr *ifp; 2079 2080 read_lock_bh(&idev->lock); 2081 for (ifp = idev->addr_list; ifp; 2082 ifp = ifp->if_next) { 2083 if (ifp->scope == IFA_LINK && 2084 !(ifp->flags & IFA_F_TENTATIVE)) { 2085 ipv6_addr_copy(&pkt_dev-> 2086 cur_in6_saddr, 2087 &ifp->addr); 2088 err = 0; 2089 break; 2090 } 2091 } 2092 read_unlock_bh(&idev->lock); 2093 } 2094 rcu_read_unlock(); 2095 if (err) 2096 printk(KERN_ERR "pktgen: ERROR: IPv6 link " 2097 "address not availble.\n"); 2098 } 2099 #endif 2100 } else { 2101 pkt_dev->saddr_min = 0; 2102 pkt_dev->saddr_max = 0; 2103 if (strlen(pkt_dev->src_min) == 0) { 2104 2105 struct in_device *in_dev; 2106 2107 rcu_read_lock(); 2108 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2109 if (in_dev) { 2110 if (in_dev->ifa_list) { 2111 pkt_dev->saddr_min = 2112 in_dev->ifa_list->ifa_address; 2113 pkt_dev->saddr_max = pkt_dev->saddr_min; 2114 } 2115 } 2116 rcu_read_unlock(); 2117 } else { 2118 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2119 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2120 } 2121 2122 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2123 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2124 } 2125 /* Initialize current values. */ 2126 pkt_dev->cur_dst_mac_offset = 0; 2127 pkt_dev->cur_src_mac_offset = 0; 2128 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2129 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2130 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2131 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2132 pkt_dev->nflows = 0; 2133 } 2134 2135 2136 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) 2137 { 2138 ktime_t start_time, end_time; 2139 s64 remaining; 2140 struct hrtimer_sleeper t; 2141 2142 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); 2143 hrtimer_set_expires(&t.timer, spin_until); 2144 2145 remaining = ktime_to_us(hrtimer_expires_remaining(&t.timer)); 2146 if (remaining <= 0) { 2147 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2148 return; 2149 } 2150 2151 start_time = ktime_now(); 2152 if (remaining < 100) 2153 udelay(remaining); /* really small just spin */ 2154 else { 2155 /* see do_nanosleep */ 2156 hrtimer_init_sleeper(&t, current); 2157 do { 2158 set_current_state(TASK_INTERRUPTIBLE); 2159 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS); 2160 if (!hrtimer_active(&t.timer)) 2161 t.task = NULL; 2162 2163 if (likely(t.task)) 2164 schedule(); 2165 2166 hrtimer_cancel(&t.timer); 2167 } while (t.task && pkt_dev->running && !signal_pending(current)); 2168 __set_current_state(TASK_RUNNING); 2169 } 2170 end_time = ktime_now(); 2171 2172 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); 2173 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2174 } 2175 2176 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2177 { 2178 pkt_dev->pkt_overhead = 0; 2179 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2180 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2181 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2182 } 2183 2184 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) 2185 { 2186 return !!(pkt_dev->flows[flow].flags & F_INIT); 2187 } 2188 2189 static inline int f_pick(struct pktgen_dev *pkt_dev) 2190 { 2191 int flow = pkt_dev->curfl; 2192 2193 if (pkt_dev->flags & F_FLOW_SEQ) { 2194 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2195 /* reset time */ 2196 pkt_dev->flows[flow].count = 0; 2197 pkt_dev->flows[flow].flags = 0; 2198 pkt_dev->curfl += 1; 2199 if (pkt_dev->curfl >= pkt_dev->cflows) 2200 pkt_dev->curfl = 0; /*reset */ 2201 } 2202 } else { 2203 flow = random32() % pkt_dev->cflows; 2204 pkt_dev->curfl = flow; 2205 2206 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2207 pkt_dev->flows[flow].count = 0; 2208 pkt_dev->flows[flow].flags = 0; 2209 } 2210 } 2211 2212 return pkt_dev->curfl; 2213 } 2214 2215 2216 #ifdef CONFIG_XFRM 2217 /* If there was already an IPSEC SA, we keep it as is, else 2218 * we go look for it ... 2219 */ 2220 #define DUMMY_MARK 0 2221 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2222 { 2223 struct xfrm_state *x = pkt_dev->flows[flow].x; 2224 if (!x) { 2225 /*slow path: we dont already have xfrm_state*/ 2226 x = xfrm_stateonly_find(&init_net, DUMMY_MARK, 2227 (xfrm_address_t *)&pkt_dev->cur_daddr, 2228 (xfrm_address_t *)&pkt_dev->cur_saddr, 2229 AF_INET, 2230 pkt_dev->ipsmode, 2231 pkt_dev->ipsproto, 0); 2232 if (x) { 2233 pkt_dev->flows[flow].x = x; 2234 set_pkt_overhead(pkt_dev); 2235 pkt_dev->pkt_overhead += x->props.header_len; 2236 } 2237 2238 } 2239 } 2240 #endif 2241 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2242 { 2243 2244 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2245 pkt_dev->cur_queue_map = smp_processor_id(); 2246 2247 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { 2248 __u16 t; 2249 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2250 t = random32() % 2251 (pkt_dev->queue_map_max - 2252 pkt_dev->queue_map_min + 1) 2253 + pkt_dev->queue_map_min; 2254 } else { 2255 t = pkt_dev->cur_queue_map + 1; 2256 if (t > pkt_dev->queue_map_max) 2257 t = pkt_dev->queue_map_min; 2258 } 2259 pkt_dev->cur_queue_map = t; 2260 } 2261 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2262 } 2263 2264 /* Increment/randomize headers according to flags and current values 2265 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2266 */ 2267 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2268 { 2269 __u32 imn; 2270 __u32 imx; 2271 int flow = 0; 2272 2273 if (pkt_dev->cflows) 2274 flow = f_pick(pkt_dev); 2275 2276 /* Deal with source MAC */ 2277 if (pkt_dev->src_mac_count > 1) { 2278 __u32 mc; 2279 __u32 tmp; 2280 2281 if (pkt_dev->flags & F_MACSRC_RND) 2282 mc = random32() % pkt_dev->src_mac_count; 2283 else { 2284 mc = pkt_dev->cur_src_mac_offset++; 2285 if (pkt_dev->cur_src_mac_offset >= 2286 pkt_dev->src_mac_count) 2287 pkt_dev->cur_src_mac_offset = 0; 2288 } 2289 2290 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2291 pkt_dev->hh[11] = tmp; 2292 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2293 pkt_dev->hh[10] = tmp; 2294 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2295 pkt_dev->hh[9] = tmp; 2296 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2297 pkt_dev->hh[8] = tmp; 2298 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2299 pkt_dev->hh[7] = tmp; 2300 } 2301 2302 /* Deal with Destination MAC */ 2303 if (pkt_dev->dst_mac_count > 1) { 2304 __u32 mc; 2305 __u32 tmp; 2306 2307 if (pkt_dev->flags & F_MACDST_RND) 2308 mc = random32() % pkt_dev->dst_mac_count; 2309 2310 else { 2311 mc = pkt_dev->cur_dst_mac_offset++; 2312 if (pkt_dev->cur_dst_mac_offset >= 2313 pkt_dev->dst_mac_count) { 2314 pkt_dev->cur_dst_mac_offset = 0; 2315 } 2316 } 2317 2318 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2319 pkt_dev->hh[5] = tmp; 2320 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2321 pkt_dev->hh[4] = tmp; 2322 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2323 pkt_dev->hh[3] = tmp; 2324 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2325 pkt_dev->hh[2] = tmp; 2326 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2327 pkt_dev->hh[1] = tmp; 2328 } 2329 2330 if (pkt_dev->flags & F_MPLS_RND) { 2331 unsigned i; 2332 for (i = 0; i < pkt_dev->nr_labels; i++) 2333 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2334 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2335 ((__force __be32)random32() & 2336 htonl(0x000fffff)); 2337 } 2338 2339 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2340 pkt_dev->vlan_id = random32() & (4096-1); 2341 } 2342 2343 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2344 pkt_dev->svlan_id = random32() & (4096 - 1); 2345 } 2346 2347 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2348 if (pkt_dev->flags & F_UDPSRC_RND) 2349 pkt_dev->cur_udp_src = random32() % 2350 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2351 + pkt_dev->udp_src_min; 2352 2353 else { 2354 pkt_dev->cur_udp_src++; 2355 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2356 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2357 } 2358 } 2359 2360 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2361 if (pkt_dev->flags & F_UDPDST_RND) { 2362 pkt_dev->cur_udp_dst = random32() % 2363 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2364 + pkt_dev->udp_dst_min; 2365 } else { 2366 pkt_dev->cur_udp_dst++; 2367 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2368 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2369 } 2370 } 2371 2372 if (!(pkt_dev->flags & F_IPV6)) { 2373 2374 imn = ntohl(pkt_dev->saddr_min); 2375 imx = ntohl(pkt_dev->saddr_max); 2376 if (imn < imx) { 2377 __u32 t; 2378 if (pkt_dev->flags & F_IPSRC_RND) 2379 t = random32() % (imx - imn) + imn; 2380 else { 2381 t = ntohl(pkt_dev->cur_saddr); 2382 t++; 2383 if (t > imx) 2384 t = imn; 2385 2386 } 2387 pkt_dev->cur_saddr = htonl(t); 2388 } 2389 2390 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2391 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2392 } else { 2393 imn = ntohl(pkt_dev->daddr_min); 2394 imx = ntohl(pkt_dev->daddr_max); 2395 if (imn < imx) { 2396 __u32 t; 2397 __be32 s; 2398 if (pkt_dev->flags & F_IPDST_RND) { 2399 2400 t = random32() % (imx - imn) + imn; 2401 s = htonl(t); 2402 2403 while (ipv4_is_loopback(s) || 2404 ipv4_is_multicast(s) || 2405 ipv4_is_lbcast(s) || 2406 ipv4_is_zeronet(s) || 2407 ipv4_is_local_multicast(s)) { 2408 t = random32() % (imx - imn) + imn; 2409 s = htonl(t); 2410 } 2411 pkt_dev->cur_daddr = s; 2412 } else { 2413 t = ntohl(pkt_dev->cur_daddr); 2414 t++; 2415 if (t > imx) { 2416 t = imn; 2417 } 2418 pkt_dev->cur_daddr = htonl(t); 2419 } 2420 } 2421 if (pkt_dev->cflows) { 2422 pkt_dev->flows[flow].flags |= F_INIT; 2423 pkt_dev->flows[flow].cur_daddr = 2424 pkt_dev->cur_daddr; 2425 #ifdef CONFIG_XFRM 2426 if (pkt_dev->flags & F_IPSEC_ON) 2427 get_ipsec_sa(pkt_dev, flow); 2428 #endif 2429 pkt_dev->nflows++; 2430 } 2431 } 2432 } else { /* IPV6 * */ 2433 2434 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 && 2435 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 && 2436 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 && 2437 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ; 2438 else { 2439 int i; 2440 2441 /* Only random destinations yet */ 2442 2443 for (i = 0; i < 4; i++) { 2444 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2445 (((__force __be32)random32() | 2446 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2447 pkt_dev->max_in6_daddr.s6_addr32[i]); 2448 } 2449 } 2450 } 2451 2452 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2453 __u32 t; 2454 if (pkt_dev->flags & F_TXSIZE_RND) { 2455 t = random32() % 2456 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2457 + pkt_dev->min_pkt_size; 2458 } else { 2459 t = pkt_dev->cur_pkt_size + 1; 2460 if (t > pkt_dev->max_pkt_size) 2461 t = pkt_dev->min_pkt_size; 2462 } 2463 pkt_dev->cur_pkt_size = t; 2464 } 2465 2466 set_cur_queue_map(pkt_dev); 2467 2468 pkt_dev->flows[flow].count++; 2469 } 2470 2471 2472 #ifdef CONFIG_XFRM 2473 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2474 { 2475 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2476 int err = 0; 2477 struct iphdr *iph; 2478 2479 if (!x) 2480 return 0; 2481 /* XXX: we dont support tunnel mode for now until 2482 * we resolve the dst issue */ 2483 if (x->props.mode != XFRM_MODE_TRANSPORT) 2484 return 0; 2485 2486 spin_lock(&x->lock); 2487 iph = ip_hdr(skb); 2488 2489 err = x->outer_mode->output(x, skb); 2490 if (err) 2491 goto error; 2492 err = x->type->output(x, skb); 2493 if (err) 2494 goto error; 2495 2496 x->curlft.bytes += skb->len; 2497 x->curlft.packets++; 2498 error: 2499 spin_unlock(&x->lock); 2500 return err; 2501 } 2502 2503 static void free_SAs(struct pktgen_dev *pkt_dev) 2504 { 2505 if (pkt_dev->cflows) { 2506 /* let go of the SAs if we have them */ 2507 int i = 0; 2508 for (; i < pkt_dev->cflows; i++) { 2509 struct xfrm_state *x = pkt_dev->flows[i].x; 2510 if (x) { 2511 xfrm_state_put(x); 2512 pkt_dev->flows[i].x = NULL; 2513 } 2514 } 2515 } 2516 } 2517 2518 static int process_ipsec(struct pktgen_dev *pkt_dev, 2519 struct sk_buff *skb, __be16 protocol) 2520 { 2521 if (pkt_dev->flags & F_IPSEC_ON) { 2522 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2523 int nhead = 0; 2524 if (x) { 2525 int ret; 2526 __u8 *eth; 2527 nhead = x->props.header_len - skb_headroom(skb); 2528 if (nhead > 0) { 2529 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2530 if (ret < 0) { 2531 printk(KERN_ERR "Error expanding " 2532 "ipsec packet %d\n", ret); 2533 goto err; 2534 } 2535 } 2536 2537 /* ipsec is not expecting ll header */ 2538 skb_pull(skb, ETH_HLEN); 2539 ret = pktgen_output_ipsec(skb, pkt_dev); 2540 if (ret) { 2541 printk(KERN_ERR "Error creating ipsec " 2542 "packet %d\n", ret); 2543 goto err; 2544 } 2545 /* restore ll */ 2546 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2547 memcpy(eth, pkt_dev->hh, 12); 2548 *(u16 *) ð[12] = protocol; 2549 } 2550 } 2551 return 1; 2552 err: 2553 kfree_skb(skb); 2554 return 0; 2555 } 2556 #endif 2557 2558 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2559 { 2560 unsigned i; 2561 for (i = 0; i < pkt_dev->nr_labels; i++) 2562 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2563 2564 mpls--; 2565 *mpls |= MPLS_STACK_BOTTOM; 2566 } 2567 2568 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2569 unsigned int prio) 2570 { 2571 return htons(id | (cfi << 12) | (prio << 13)); 2572 } 2573 2574 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2575 struct pktgen_dev *pkt_dev) 2576 { 2577 struct sk_buff *skb = NULL; 2578 __u8 *eth; 2579 struct udphdr *udph; 2580 int datalen, iplen; 2581 struct iphdr *iph; 2582 struct pktgen_hdr *pgh = NULL; 2583 __be16 protocol = htons(ETH_P_IP); 2584 __be32 *mpls; 2585 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2586 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2587 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2588 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2589 u16 queue_map; 2590 2591 if (pkt_dev->nr_labels) 2592 protocol = htons(ETH_P_MPLS_UC); 2593 2594 if (pkt_dev->vlan_id != 0xffff) 2595 protocol = htons(ETH_P_8021Q); 2596 2597 /* Update any of the values, used when we're incrementing various 2598 * fields. 2599 */ 2600 queue_map = pkt_dev->cur_queue_map; 2601 mod_cur_headers(pkt_dev); 2602 2603 datalen = (odev->hard_header_len + 16) & ~0xf; 2604 2605 if (pkt_dev->flags & F_NODE) { 2606 int node; 2607 2608 if (pkt_dev->node >= 0) 2609 node = pkt_dev->node; 2610 else 2611 node = numa_node_id(); 2612 2613 skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64 2614 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node); 2615 if (likely(skb)) { 2616 skb_reserve(skb, NET_SKB_PAD); 2617 skb->dev = odev; 2618 } 2619 } 2620 else 2621 skb = __netdev_alloc_skb(odev, 2622 pkt_dev->cur_pkt_size + 64 2623 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT); 2624 2625 if (!skb) { 2626 sprintf(pkt_dev->result, "No memory"); 2627 return NULL; 2628 } 2629 2630 skb_reserve(skb, datalen); 2631 2632 /* Reserve for ethernet and IP header */ 2633 eth = (__u8 *) skb_push(skb, 14); 2634 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2635 if (pkt_dev->nr_labels) 2636 mpls_push(mpls, pkt_dev); 2637 2638 if (pkt_dev->vlan_id != 0xffff) { 2639 if (pkt_dev->svlan_id != 0xffff) { 2640 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2641 *svlan_tci = build_tci(pkt_dev->svlan_id, 2642 pkt_dev->svlan_cfi, 2643 pkt_dev->svlan_p); 2644 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2645 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2646 } 2647 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2648 *vlan_tci = build_tci(pkt_dev->vlan_id, 2649 pkt_dev->vlan_cfi, 2650 pkt_dev->vlan_p); 2651 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2652 *vlan_encapsulated_proto = htons(ETH_P_IP); 2653 } 2654 2655 skb->network_header = skb->tail; 2656 skb->transport_header = skb->network_header + sizeof(struct iphdr); 2657 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr)); 2658 skb_set_queue_mapping(skb, queue_map); 2659 iph = ip_hdr(skb); 2660 udph = udp_hdr(skb); 2661 2662 memcpy(eth, pkt_dev->hh, 12); 2663 *(__be16 *) & eth[12] = protocol; 2664 2665 /* Eth + IPh + UDPh + mpls */ 2666 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2667 pkt_dev->pkt_overhead; 2668 if (datalen < sizeof(struct pktgen_hdr)) 2669 datalen = sizeof(struct pktgen_hdr); 2670 2671 udph->source = htons(pkt_dev->cur_udp_src); 2672 udph->dest = htons(pkt_dev->cur_udp_dst); 2673 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2674 udph->check = 0; /* No checksum */ 2675 2676 iph->ihl = 5; 2677 iph->version = 4; 2678 iph->ttl = 32; 2679 iph->tos = pkt_dev->tos; 2680 iph->protocol = IPPROTO_UDP; /* UDP */ 2681 iph->saddr = pkt_dev->cur_saddr; 2682 iph->daddr = pkt_dev->cur_daddr; 2683 iph->id = htons(pkt_dev->ip_id); 2684 pkt_dev->ip_id++; 2685 iph->frag_off = 0; 2686 iplen = 20 + 8 + datalen; 2687 iph->tot_len = htons(iplen); 2688 iph->check = 0; 2689 iph->check = ip_fast_csum((void *)iph, iph->ihl); 2690 skb->protocol = protocol; 2691 skb->mac_header = (skb->network_header - ETH_HLEN - 2692 pkt_dev->pkt_overhead); 2693 skb->dev = odev; 2694 skb->pkt_type = PACKET_HOST; 2695 2696 if (pkt_dev->nfrags <= 0) { 2697 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 2698 memset(pgh + 1, 0, datalen - sizeof(struct pktgen_hdr)); 2699 } else { 2700 int frags = pkt_dev->nfrags; 2701 int i, len; 2702 2703 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 2704 2705 if (frags > MAX_SKB_FRAGS) 2706 frags = MAX_SKB_FRAGS; 2707 if (datalen > frags * PAGE_SIZE) { 2708 len = datalen - frags * PAGE_SIZE; 2709 memset(skb_put(skb, len), 0, len); 2710 datalen = frags * PAGE_SIZE; 2711 } 2712 2713 i = 0; 2714 while (datalen > 0) { 2715 struct page *page = alloc_pages(GFP_KERNEL | __GFP_ZERO, 0); 2716 skb_shinfo(skb)->frags[i].page = page; 2717 skb_shinfo(skb)->frags[i].page_offset = 0; 2718 skb_shinfo(skb)->frags[i].size = 2719 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 2720 datalen -= skb_shinfo(skb)->frags[i].size; 2721 skb->len += skb_shinfo(skb)->frags[i].size; 2722 skb->data_len += skb_shinfo(skb)->frags[i].size; 2723 i++; 2724 skb_shinfo(skb)->nr_frags = i; 2725 } 2726 2727 while (i < frags) { 2728 int rem; 2729 2730 if (i == 0) 2731 break; 2732 2733 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 2734 if (rem == 0) 2735 break; 2736 2737 skb_shinfo(skb)->frags[i - 1].size -= rem; 2738 2739 skb_shinfo(skb)->frags[i] = 2740 skb_shinfo(skb)->frags[i - 1]; 2741 get_page(skb_shinfo(skb)->frags[i].page); 2742 skb_shinfo(skb)->frags[i].page = 2743 skb_shinfo(skb)->frags[i - 1].page; 2744 skb_shinfo(skb)->frags[i].page_offset += 2745 skb_shinfo(skb)->frags[i - 1].size; 2746 skb_shinfo(skb)->frags[i].size = rem; 2747 i++; 2748 skb_shinfo(skb)->nr_frags = i; 2749 } 2750 } 2751 2752 /* Stamp the time, and sequence number, 2753 * convert them to network byte order 2754 */ 2755 if (pgh) { 2756 struct timeval timestamp; 2757 2758 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2759 pgh->seq_num = htonl(pkt_dev->seq_num); 2760 2761 do_gettimeofday(×tamp); 2762 pgh->tv_sec = htonl(timestamp.tv_sec); 2763 pgh->tv_usec = htonl(timestamp.tv_usec); 2764 } 2765 2766 #ifdef CONFIG_XFRM 2767 if (!process_ipsec(pkt_dev, skb, protocol)) 2768 return NULL; 2769 #endif 2770 2771 return skb; 2772 } 2773 2774 /* 2775 * scan_ip6, fmt_ip taken from dietlibc-0.21 2776 * Author Felix von Leitner <felix-dietlibc@fefe.de> 2777 * 2778 * Slightly modified for kernel. 2779 * Should be candidate for net/ipv4/utils.c 2780 * --ro 2781 */ 2782 2783 static unsigned int scan_ip6(const char *s, char ip[16]) 2784 { 2785 unsigned int i; 2786 unsigned int len = 0; 2787 unsigned long u; 2788 char suffix[16]; 2789 unsigned int prefixlen = 0; 2790 unsigned int suffixlen = 0; 2791 __be32 tmp; 2792 char *pos; 2793 2794 for (i = 0; i < 16; i++) 2795 ip[i] = 0; 2796 2797 for (;;) { 2798 if (*s == ':') { 2799 len++; 2800 if (s[1] == ':') { /* Found "::", skip to part 2 */ 2801 s += 2; 2802 len++; 2803 break; 2804 } 2805 s++; 2806 } 2807 2808 u = simple_strtoul(s, &pos, 16); 2809 i = pos - s; 2810 if (!i) 2811 return 0; 2812 if (prefixlen == 12 && s[i] == '.') { 2813 2814 /* the last 4 bytes may be written as IPv4 address */ 2815 2816 tmp = in_aton(s); 2817 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp)); 2818 return i + len; 2819 } 2820 ip[prefixlen++] = (u >> 8); 2821 ip[prefixlen++] = (u & 255); 2822 s += i; 2823 len += i; 2824 if (prefixlen == 16) 2825 return len; 2826 } 2827 2828 /* part 2, after "::" */ 2829 for (;;) { 2830 if (*s == ':') { 2831 if (suffixlen == 0) 2832 break; 2833 s++; 2834 len++; 2835 } else if (suffixlen != 0) 2836 break; 2837 2838 u = simple_strtol(s, &pos, 16); 2839 i = pos - s; 2840 if (!i) { 2841 if (*s) 2842 len--; 2843 break; 2844 } 2845 if (suffixlen + prefixlen <= 12 && s[i] == '.') { 2846 tmp = in_aton(s); 2847 memcpy((struct in_addr *)(suffix + suffixlen), &tmp, 2848 sizeof(tmp)); 2849 suffixlen += 4; 2850 len += strlen(s); 2851 break; 2852 } 2853 suffix[suffixlen++] = (u >> 8); 2854 suffix[suffixlen++] = (u & 255); 2855 s += i; 2856 len += i; 2857 if (prefixlen + suffixlen == 16) 2858 break; 2859 } 2860 for (i = 0; i < suffixlen; i++) 2861 ip[16 - suffixlen + i] = suffix[i]; 2862 return len; 2863 } 2864 2865 static char tohex(char hexdigit) 2866 { 2867 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0'; 2868 } 2869 2870 static int fmt_xlong(char *s, unsigned int i) 2871 { 2872 char *bak = s; 2873 *s = tohex((i >> 12) & 0xf); 2874 if (s != bak || *s != '0') 2875 ++s; 2876 *s = tohex((i >> 8) & 0xf); 2877 if (s != bak || *s != '0') 2878 ++s; 2879 *s = tohex((i >> 4) & 0xf); 2880 if (s != bak || *s != '0') 2881 ++s; 2882 *s = tohex(i & 0xf); 2883 return s - bak + 1; 2884 } 2885 2886 static unsigned int fmt_ip6(char *s, const char ip[16]) 2887 { 2888 unsigned int len; 2889 unsigned int i; 2890 unsigned int temp; 2891 unsigned int compressing; 2892 int j; 2893 2894 len = 0; 2895 compressing = 0; 2896 for (j = 0; j < 16; j += 2) { 2897 2898 #ifdef V4MAPPEDPREFIX 2899 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) { 2900 inet_ntoa_r(*(struct in_addr *)(ip + 12), s); 2901 temp = strlen(s); 2902 return len + temp; 2903 } 2904 #endif 2905 temp = ((unsigned long)(unsigned char)ip[j] << 8) + 2906 (unsigned long)(unsigned char)ip[j + 1]; 2907 if (temp == 0) { 2908 if (!compressing) { 2909 compressing = 1; 2910 if (j == 0) { 2911 *s++ = ':'; 2912 ++len; 2913 } 2914 } 2915 } else { 2916 if (compressing) { 2917 compressing = 0; 2918 *s++ = ':'; 2919 ++len; 2920 } 2921 i = fmt_xlong(s, temp); 2922 len += i; 2923 s += i; 2924 if (j < 14) { 2925 *s++ = ':'; 2926 ++len; 2927 } 2928 } 2929 } 2930 if (compressing) { 2931 *s++ = ':'; 2932 ++len; 2933 } 2934 *s = 0; 2935 return len; 2936 } 2937 2938 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2939 struct pktgen_dev *pkt_dev) 2940 { 2941 struct sk_buff *skb = NULL; 2942 __u8 *eth; 2943 struct udphdr *udph; 2944 int datalen; 2945 struct ipv6hdr *iph; 2946 struct pktgen_hdr *pgh = NULL; 2947 __be16 protocol = htons(ETH_P_IPV6); 2948 __be32 *mpls; 2949 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2950 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2951 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2952 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2953 u16 queue_map; 2954 2955 if (pkt_dev->nr_labels) 2956 protocol = htons(ETH_P_MPLS_UC); 2957 2958 if (pkt_dev->vlan_id != 0xffff) 2959 protocol = htons(ETH_P_8021Q); 2960 2961 /* Update any of the values, used when we're incrementing various 2962 * fields. 2963 */ 2964 queue_map = pkt_dev->cur_queue_map; 2965 mod_cur_headers(pkt_dev); 2966 2967 skb = __netdev_alloc_skb(odev, 2968 pkt_dev->cur_pkt_size + 64 2969 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT); 2970 if (!skb) { 2971 sprintf(pkt_dev->result, "No memory"); 2972 return NULL; 2973 } 2974 2975 skb_reserve(skb, 16); 2976 2977 /* Reserve for ethernet and IP header */ 2978 eth = (__u8 *) skb_push(skb, 14); 2979 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2980 if (pkt_dev->nr_labels) 2981 mpls_push(mpls, pkt_dev); 2982 2983 if (pkt_dev->vlan_id != 0xffff) { 2984 if (pkt_dev->svlan_id != 0xffff) { 2985 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2986 *svlan_tci = build_tci(pkt_dev->svlan_id, 2987 pkt_dev->svlan_cfi, 2988 pkt_dev->svlan_p); 2989 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2990 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2991 } 2992 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2993 *vlan_tci = build_tci(pkt_dev->vlan_id, 2994 pkt_dev->vlan_cfi, 2995 pkt_dev->vlan_p); 2996 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2997 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 2998 } 2999 3000 skb->network_header = skb->tail; 3001 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr); 3002 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr)); 3003 skb_set_queue_mapping(skb, queue_map); 3004 iph = ipv6_hdr(skb); 3005 udph = udp_hdr(skb); 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 < sizeof(struct pktgen_hdr)) { 3016 datalen = sizeof(struct pktgen_hdr); 3017 if (net_ratelimit()) 3018 printk(KERN_INFO "pktgen: increased datalen to %d\n", 3019 datalen); 3020 } 3021 3022 udph->source = htons(pkt_dev->cur_udp_src); 3023 udph->dest = htons(pkt_dev->cur_udp_dst); 3024 udph->len = htons(datalen + sizeof(struct udphdr)); 3025 udph->check = 0; /* No checksum */ 3026 3027 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 3028 3029 if (pkt_dev->traffic_class) { 3030 /* Version + traffic class + flow (0) */ 3031 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 3032 } 3033 3034 iph->hop_limit = 32; 3035 3036 iph->payload_len = htons(sizeof(struct udphdr) + datalen); 3037 iph->nexthdr = IPPROTO_UDP; 3038 3039 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr); 3040 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr); 3041 3042 skb->mac_header = (skb->network_header - ETH_HLEN - 3043 pkt_dev->pkt_overhead); 3044 skb->protocol = protocol; 3045 skb->dev = odev; 3046 skb->pkt_type = PACKET_HOST; 3047 3048 if (pkt_dev->nfrags <= 0) 3049 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 3050 else { 3051 int frags = pkt_dev->nfrags; 3052 int i; 3053 3054 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 3055 3056 if (frags > MAX_SKB_FRAGS) 3057 frags = MAX_SKB_FRAGS; 3058 if (datalen > frags * PAGE_SIZE) { 3059 skb_put(skb, datalen - frags * PAGE_SIZE); 3060 datalen = frags * PAGE_SIZE; 3061 } 3062 3063 i = 0; 3064 while (datalen > 0) { 3065 struct page *page = alloc_pages(GFP_KERNEL, 0); 3066 skb_shinfo(skb)->frags[i].page = page; 3067 skb_shinfo(skb)->frags[i].page_offset = 0; 3068 skb_shinfo(skb)->frags[i].size = 3069 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 3070 datalen -= skb_shinfo(skb)->frags[i].size; 3071 skb->len += skb_shinfo(skb)->frags[i].size; 3072 skb->data_len += skb_shinfo(skb)->frags[i].size; 3073 i++; 3074 skb_shinfo(skb)->nr_frags = i; 3075 } 3076 3077 while (i < frags) { 3078 int rem; 3079 3080 if (i == 0) 3081 break; 3082 3083 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 3084 if (rem == 0) 3085 break; 3086 3087 skb_shinfo(skb)->frags[i - 1].size -= rem; 3088 3089 skb_shinfo(skb)->frags[i] = 3090 skb_shinfo(skb)->frags[i - 1]; 3091 get_page(skb_shinfo(skb)->frags[i].page); 3092 skb_shinfo(skb)->frags[i].page = 3093 skb_shinfo(skb)->frags[i - 1].page; 3094 skb_shinfo(skb)->frags[i].page_offset += 3095 skb_shinfo(skb)->frags[i - 1].size; 3096 skb_shinfo(skb)->frags[i].size = rem; 3097 i++; 3098 skb_shinfo(skb)->nr_frags = i; 3099 } 3100 } 3101 3102 /* Stamp the time, and sequence number, 3103 * convert them to network byte order 3104 * should we update cloned packets too ? 3105 */ 3106 if (pgh) { 3107 struct timeval timestamp; 3108 3109 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 3110 pgh->seq_num = htonl(pkt_dev->seq_num); 3111 3112 do_gettimeofday(×tamp); 3113 pgh->tv_sec = htonl(timestamp.tv_sec); 3114 pgh->tv_usec = htonl(timestamp.tv_usec); 3115 } 3116 /* pkt_dev->seq_num++; FF: you really mean this? */ 3117 3118 return skb; 3119 } 3120 3121 static struct sk_buff *fill_packet(struct net_device *odev, 3122 struct pktgen_dev *pkt_dev) 3123 { 3124 if (pkt_dev->flags & F_IPV6) 3125 return fill_packet_ipv6(odev, pkt_dev); 3126 else 3127 return fill_packet_ipv4(odev, pkt_dev); 3128 } 3129 3130 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 3131 { 3132 pkt_dev->seq_num = 1; 3133 pkt_dev->idle_acc = 0; 3134 pkt_dev->sofar = 0; 3135 pkt_dev->tx_bytes = 0; 3136 pkt_dev->errors = 0; 3137 } 3138 3139 /* Set up structure for sending pkts, clear counters */ 3140 3141 static void pktgen_run(struct pktgen_thread *t) 3142 { 3143 struct pktgen_dev *pkt_dev; 3144 int started = 0; 3145 3146 pr_debug("pktgen: entering pktgen_run. %p\n", t); 3147 3148 if_lock(t); 3149 list_for_each_entry(pkt_dev, &t->if_list, list) { 3150 3151 /* 3152 * setup odev and create initial packet. 3153 */ 3154 pktgen_setup_inject(pkt_dev); 3155 3156 if (pkt_dev->odev) { 3157 pktgen_clear_counters(pkt_dev); 3158 pkt_dev->running = 1; /* Cranke yeself! */ 3159 pkt_dev->skb = NULL; 3160 pkt_dev->started_at = 3161 pkt_dev->next_tx = ktime_now(); 3162 3163 set_pkt_overhead(pkt_dev); 3164 3165 strcpy(pkt_dev->result, "Starting"); 3166 started++; 3167 } else 3168 strcpy(pkt_dev->result, "Error starting"); 3169 } 3170 if_unlock(t); 3171 if (started) 3172 t->control &= ~(T_STOP); 3173 } 3174 3175 static void pktgen_stop_all_threads_ifs(void) 3176 { 3177 struct pktgen_thread *t; 3178 3179 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n"); 3180 3181 mutex_lock(&pktgen_thread_lock); 3182 3183 list_for_each_entry(t, &pktgen_threads, th_list) 3184 t->control |= T_STOP; 3185 3186 mutex_unlock(&pktgen_thread_lock); 3187 } 3188 3189 static int thread_is_running(const struct pktgen_thread *t) 3190 { 3191 const struct pktgen_dev *pkt_dev; 3192 3193 list_for_each_entry(pkt_dev, &t->if_list, list) 3194 if (pkt_dev->running) 3195 return 1; 3196 return 0; 3197 } 3198 3199 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3200 { 3201 if_lock(t); 3202 3203 while (thread_is_running(t)) { 3204 3205 if_unlock(t); 3206 3207 msleep_interruptible(100); 3208 3209 if (signal_pending(current)) 3210 goto signal; 3211 if_lock(t); 3212 } 3213 if_unlock(t); 3214 return 1; 3215 signal: 3216 return 0; 3217 } 3218 3219 static int pktgen_wait_all_threads_run(void) 3220 { 3221 struct pktgen_thread *t; 3222 int sig = 1; 3223 3224 mutex_lock(&pktgen_thread_lock); 3225 3226 list_for_each_entry(t, &pktgen_threads, th_list) { 3227 sig = pktgen_wait_thread_run(t); 3228 if (sig == 0) 3229 break; 3230 } 3231 3232 if (sig == 0) 3233 list_for_each_entry(t, &pktgen_threads, th_list) 3234 t->control |= (T_STOP); 3235 3236 mutex_unlock(&pktgen_thread_lock); 3237 return sig; 3238 } 3239 3240 static void pktgen_run_all_threads(void) 3241 { 3242 struct pktgen_thread *t; 3243 3244 pr_debug("pktgen: entering pktgen_run_all_threads.\n"); 3245 3246 mutex_lock(&pktgen_thread_lock); 3247 3248 list_for_each_entry(t, &pktgen_threads, th_list) 3249 t->control |= (T_RUN); 3250 3251 mutex_unlock(&pktgen_thread_lock); 3252 3253 /* Propagate thread->control */ 3254 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3255 3256 pktgen_wait_all_threads_run(); 3257 } 3258 3259 static void pktgen_reset_all_threads(void) 3260 { 3261 struct pktgen_thread *t; 3262 3263 pr_debug("pktgen: entering pktgen_reset_all_threads.\n"); 3264 3265 mutex_lock(&pktgen_thread_lock); 3266 3267 list_for_each_entry(t, &pktgen_threads, th_list) 3268 t->control |= (T_REMDEVALL); 3269 3270 mutex_unlock(&pktgen_thread_lock); 3271 3272 /* Propagate thread->control */ 3273 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3274 3275 pktgen_wait_all_threads_run(); 3276 } 3277 3278 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3279 { 3280 __u64 bps, mbps, pps; 3281 char *p = pkt_dev->result; 3282 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3283 pkt_dev->started_at); 3284 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3285 3286 p += sprintf(p, "OK: %llu(c%llu+d%llu) nsec, %llu (%dbyte,%dfrags)\n", 3287 (unsigned long long)ktime_to_us(elapsed), 3288 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3289 (unsigned long long)ktime_to_us(idle), 3290 (unsigned long long)pkt_dev->sofar, 3291 pkt_dev->cur_pkt_size, nr_frags); 3292 3293 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3294 ktime_to_ns(elapsed)); 3295 3296 bps = pps * 8 * pkt_dev->cur_pkt_size; 3297 3298 mbps = bps; 3299 do_div(mbps, 1000000); 3300 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3301 (unsigned long long)pps, 3302 (unsigned long long)mbps, 3303 (unsigned long long)bps, 3304 (unsigned long long)pkt_dev->errors); 3305 } 3306 3307 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3308 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3309 { 3310 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3311 3312 if (!pkt_dev->running) { 3313 printk(KERN_WARNING "pktgen: interface: %s is already " 3314 "stopped\n", pkt_dev->odevname); 3315 return -EINVAL; 3316 } 3317 3318 kfree_skb(pkt_dev->skb); 3319 pkt_dev->skb = NULL; 3320 pkt_dev->stopped_at = ktime_now(); 3321 pkt_dev->running = 0; 3322 3323 show_results(pkt_dev, nr_frags); 3324 3325 return 0; 3326 } 3327 3328 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3329 { 3330 struct pktgen_dev *pkt_dev, *best = NULL; 3331 3332 if_lock(t); 3333 3334 list_for_each_entry(pkt_dev, &t->if_list, list) { 3335 if (!pkt_dev->running) 3336 continue; 3337 if (best == NULL) 3338 best = pkt_dev; 3339 else if (ktime_lt(pkt_dev->next_tx, best->next_tx)) 3340 best = pkt_dev; 3341 } 3342 if_unlock(t); 3343 return best; 3344 } 3345 3346 static void pktgen_stop(struct pktgen_thread *t) 3347 { 3348 struct pktgen_dev *pkt_dev; 3349 3350 pr_debug("pktgen: entering pktgen_stop\n"); 3351 3352 if_lock(t); 3353 3354 list_for_each_entry(pkt_dev, &t->if_list, list) { 3355 pktgen_stop_device(pkt_dev); 3356 } 3357 3358 if_unlock(t); 3359 } 3360 3361 /* 3362 * one of our devices needs to be removed - find it 3363 * and remove it 3364 */ 3365 static void pktgen_rem_one_if(struct pktgen_thread *t) 3366 { 3367 struct list_head *q, *n; 3368 struct pktgen_dev *cur; 3369 3370 pr_debug("pktgen: entering pktgen_rem_one_if\n"); 3371 3372 if_lock(t); 3373 3374 list_for_each_safe(q, n, &t->if_list) { 3375 cur = list_entry(q, struct pktgen_dev, list); 3376 3377 if (!cur->removal_mark) 3378 continue; 3379 3380 kfree_skb(cur->skb); 3381 cur->skb = NULL; 3382 3383 pktgen_remove_device(t, cur); 3384 3385 break; 3386 } 3387 3388 if_unlock(t); 3389 } 3390 3391 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3392 { 3393 struct list_head *q, *n; 3394 struct pktgen_dev *cur; 3395 3396 /* Remove all devices, free mem */ 3397 3398 pr_debug("pktgen: entering pktgen_rem_all_ifs\n"); 3399 if_lock(t); 3400 3401 list_for_each_safe(q, n, &t->if_list) { 3402 cur = list_entry(q, struct pktgen_dev, list); 3403 3404 kfree_skb(cur->skb); 3405 cur->skb = NULL; 3406 3407 pktgen_remove_device(t, cur); 3408 } 3409 3410 if_unlock(t); 3411 } 3412 3413 static void pktgen_rem_thread(struct pktgen_thread *t) 3414 { 3415 /* Remove from the thread list */ 3416 3417 remove_proc_entry(t->tsk->comm, pg_proc_dir); 3418 3419 mutex_lock(&pktgen_thread_lock); 3420 3421 list_del(&t->th_list); 3422 3423 mutex_unlock(&pktgen_thread_lock); 3424 } 3425 3426 static void pktgen_resched(struct pktgen_dev *pkt_dev) 3427 { 3428 ktime_t idle_start = ktime_now(); 3429 schedule(); 3430 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3431 } 3432 3433 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) 3434 { 3435 ktime_t idle_start = ktime_now(); 3436 3437 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3438 if (signal_pending(current)) 3439 break; 3440 3441 if (need_resched()) 3442 pktgen_resched(pkt_dev); 3443 else 3444 cpu_relax(); 3445 } 3446 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3447 } 3448 3449 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3450 { 3451 struct net_device *odev = pkt_dev->odev; 3452 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *) 3453 = odev->netdev_ops->ndo_start_xmit; 3454 struct netdev_queue *txq; 3455 u16 queue_map; 3456 int ret; 3457 3458 /* If device is offline, then don't send */ 3459 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { 3460 pktgen_stop_device(pkt_dev); 3461 return; 3462 } 3463 3464 /* This is max DELAY, this has special meaning of 3465 * "never transmit" 3466 */ 3467 if (unlikely(pkt_dev->delay == ULLONG_MAX)) { 3468 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX); 3469 return; 3470 } 3471 3472 /* If no skb or clone count exhausted then get new one */ 3473 if (!pkt_dev->skb || (pkt_dev->last_ok && 3474 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { 3475 /* build a new pkt */ 3476 kfree_skb(pkt_dev->skb); 3477 3478 pkt_dev->skb = fill_packet(odev, pkt_dev); 3479 if (pkt_dev->skb == NULL) { 3480 printk(KERN_ERR "pktgen: ERROR: couldn't " 3481 "allocate skb in fill_packet.\n"); 3482 schedule(); 3483 pkt_dev->clone_count--; /* back out increment, OOM */ 3484 return; 3485 } 3486 pkt_dev->last_pkt_size = pkt_dev->skb->len; 3487 pkt_dev->allocated_skbs++; 3488 pkt_dev->clone_count = 0; /* reset counter */ 3489 } 3490 3491 if (pkt_dev->delay && pkt_dev->last_ok) 3492 spin(pkt_dev, pkt_dev->next_tx); 3493 3494 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3495 txq = netdev_get_tx_queue(odev, queue_map); 3496 3497 __netif_tx_lock_bh(txq); 3498 3499 if (unlikely(netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq))) { 3500 ret = NETDEV_TX_BUSY; 3501 pkt_dev->last_ok = 0; 3502 goto unlock; 3503 } 3504 atomic_inc(&(pkt_dev->skb->users)); 3505 ret = (*xmit)(pkt_dev->skb, odev); 3506 3507 switch (ret) { 3508 case NETDEV_TX_OK: 3509 txq_trans_update(txq); 3510 pkt_dev->last_ok = 1; 3511 pkt_dev->sofar++; 3512 pkt_dev->seq_num++; 3513 pkt_dev->tx_bytes += pkt_dev->last_pkt_size; 3514 break; 3515 case NET_XMIT_DROP: 3516 case NET_XMIT_CN: 3517 case NET_XMIT_POLICED: 3518 /* skb has been consumed */ 3519 pkt_dev->errors++; 3520 break; 3521 default: /* Drivers are not supposed to return other values! */ 3522 if (net_ratelimit()) 3523 pr_info("pktgen: %s xmit error: %d\n", 3524 pkt_dev->odevname, ret); 3525 pkt_dev->errors++; 3526 /* fallthru */ 3527 case NETDEV_TX_LOCKED: 3528 case NETDEV_TX_BUSY: 3529 /* Retry it next time */ 3530 atomic_dec(&(pkt_dev->skb->users)); 3531 pkt_dev->last_ok = 0; 3532 } 3533 unlock: 3534 __netif_tx_unlock_bh(txq); 3535 3536 /* If pkt_dev->count is zero, then run forever */ 3537 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3538 pktgen_wait_for_skb(pkt_dev); 3539 3540 /* Done with this */ 3541 pktgen_stop_device(pkt_dev); 3542 } 3543 } 3544 3545 /* 3546 * Main loop of the thread goes here 3547 */ 3548 3549 static int pktgen_thread_worker(void *arg) 3550 { 3551 DEFINE_WAIT(wait); 3552 struct pktgen_thread *t = arg; 3553 struct pktgen_dev *pkt_dev = NULL; 3554 int cpu = t->cpu; 3555 3556 BUG_ON(smp_processor_id() != cpu); 3557 3558 init_waitqueue_head(&t->queue); 3559 complete(&t->start_done); 3560 3561 pr_debug("pktgen: starting pktgen/%d: pid=%d\n", 3562 cpu, task_pid_nr(current)); 3563 3564 set_current_state(TASK_INTERRUPTIBLE); 3565 3566 set_freezable(); 3567 3568 while (!kthread_should_stop()) { 3569 pkt_dev = next_to_run(t); 3570 3571 if (unlikely(!pkt_dev && t->control == 0)) { 3572 wait_event_interruptible_timeout(t->queue, 3573 t->control != 0, 3574 HZ/10); 3575 try_to_freeze(); 3576 continue; 3577 } 3578 3579 __set_current_state(TASK_RUNNING); 3580 3581 if (likely(pkt_dev)) { 3582 pktgen_xmit(pkt_dev); 3583 3584 if (need_resched()) 3585 pktgen_resched(pkt_dev); 3586 else 3587 cpu_relax(); 3588 } 3589 3590 if (t->control & T_STOP) { 3591 pktgen_stop(t); 3592 t->control &= ~(T_STOP); 3593 } 3594 3595 if (t->control & T_RUN) { 3596 pktgen_run(t); 3597 t->control &= ~(T_RUN); 3598 } 3599 3600 if (t->control & T_REMDEVALL) { 3601 pktgen_rem_all_ifs(t); 3602 t->control &= ~(T_REMDEVALL); 3603 } 3604 3605 if (t->control & T_REMDEV) { 3606 pktgen_rem_one_if(t); 3607 t->control &= ~(T_REMDEV); 3608 } 3609 3610 try_to_freeze(); 3611 3612 set_current_state(TASK_INTERRUPTIBLE); 3613 } 3614 3615 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm); 3616 pktgen_stop(t); 3617 3618 pr_debug("pktgen: %s removing all device\n", t->tsk->comm); 3619 pktgen_rem_all_ifs(t); 3620 3621 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm); 3622 pktgen_rem_thread(t); 3623 3624 return 0; 3625 } 3626 3627 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3628 const char *ifname, bool exact) 3629 { 3630 struct pktgen_dev *p, *pkt_dev = NULL; 3631 size_t len = strlen(ifname); 3632 3633 if_lock(t); 3634 list_for_each_entry(p, &t->if_list, list) 3635 if (strncmp(p->odevname, ifname, len) == 0) { 3636 if (p->odevname[len]) { 3637 if (exact || p->odevname[len] != '@') 3638 continue; 3639 } 3640 pkt_dev = p; 3641 break; 3642 } 3643 3644 if_unlock(t); 3645 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev); 3646 return pkt_dev; 3647 } 3648 3649 /* 3650 * Adds a dev at front of if_list. 3651 */ 3652 3653 static int add_dev_to_thread(struct pktgen_thread *t, 3654 struct pktgen_dev *pkt_dev) 3655 { 3656 int rv = 0; 3657 3658 if_lock(t); 3659 3660 if (pkt_dev->pg_thread) { 3661 printk(KERN_ERR "pktgen: ERROR: already assigned " 3662 "to a thread.\n"); 3663 rv = -EBUSY; 3664 goto out; 3665 } 3666 3667 list_add(&pkt_dev->list, &t->if_list); 3668 pkt_dev->pg_thread = t; 3669 pkt_dev->running = 0; 3670 3671 out: 3672 if_unlock(t); 3673 return rv; 3674 } 3675 3676 /* Called under thread lock */ 3677 3678 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3679 { 3680 struct pktgen_dev *pkt_dev; 3681 int err; 3682 int node = cpu_to_node(t->cpu); 3683 3684 /* We don't allow a device to be on several threads */ 3685 3686 pkt_dev = __pktgen_NN_threads(ifname, FIND); 3687 if (pkt_dev) { 3688 printk(KERN_ERR "pktgen: ERROR: interface already used.\n"); 3689 return -EBUSY; 3690 } 3691 3692 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); 3693 if (!pkt_dev) 3694 return -ENOMEM; 3695 3696 strcpy(pkt_dev->odevname, ifname); 3697 pkt_dev->flows = vmalloc_node(MAX_CFLOWS * sizeof(struct flow_state), 3698 node); 3699 if (pkt_dev->flows == NULL) { 3700 kfree(pkt_dev); 3701 return -ENOMEM; 3702 } 3703 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state)); 3704 3705 pkt_dev->removal_mark = 0; 3706 pkt_dev->min_pkt_size = ETH_ZLEN; 3707 pkt_dev->max_pkt_size = ETH_ZLEN; 3708 pkt_dev->nfrags = 0; 3709 pkt_dev->clone_skb = pg_clone_skb_d; 3710 pkt_dev->delay = pg_delay_d; 3711 pkt_dev->count = pg_count_d; 3712 pkt_dev->sofar = 0; 3713 pkt_dev->udp_src_min = 9; /* sink port */ 3714 pkt_dev->udp_src_max = 9; 3715 pkt_dev->udp_dst_min = 9; 3716 pkt_dev->udp_dst_max = 9; 3717 3718 pkt_dev->vlan_p = 0; 3719 pkt_dev->vlan_cfi = 0; 3720 pkt_dev->vlan_id = 0xffff; 3721 pkt_dev->svlan_p = 0; 3722 pkt_dev->svlan_cfi = 0; 3723 pkt_dev->svlan_id = 0xffff; 3724 pkt_dev->node = -1; 3725 3726 err = pktgen_setup_dev(pkt_dev, ifname); 3727 if (err) 3728 goto out1; 3729 3730 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir, 3731 &pktgen_if_fops, pkt_dev); 3732 if (!pkt_dev->entry) { 3733 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n", 3734 PG_PROC_DIR, ifname); 3735 err = -EINVAL; 3736 goto out2; 3737 } 3738 #ifdef CONFIG_XFRM 3739 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3740 pkt_dev->ipsproto = IPPROTO_ESP; 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 __init pktgen_create_thread(int cpu) 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 printk(KERN_ERR "pktgen: ERROR: out of memory, can't " 3765 "create new thread.\n"); 3766 return -ENOMEM; 3767 } 3768 3769 spin_lock_init(&t->if_lock); 3770 t->cpu = cpu; 3771 3772 INIT_LIST_HEAD(&t->if_list); 3773 3774 list_add_tail(&t->th_list, &pktgen_threads); 3775 init_completion(&t->start_done); 3776 3777 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu); 3778 if (IS_ERR(p)) { 3779 printk(KERN_ERR "pktgen: kernel_thread() failed " 3780 "for cpu %d\n", t->cpu); 3781 list_del(&t->th_list); 3782 kfree(t); 3783 return PTR_ERR(p); 3784 } 3785 kthread_bind(p, cpu); 3786 t->tsk = p; 3787 3788 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir, 3789 &pktgen_thread_fops, t); 3790 if (!pe) { 3791 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n", 3792 PG_PROC_DIR, t->tsk->comm); 3793 kthread_stop(p); 3794 list_del(&t->th_list); 3795 kfree(t); 3796 return -EINVAL; 3797 } 3798 3799 wake_up_process(p); 3800 wait_for_completion(&t->start_done); 3801 3802 return 0; 3803 } 3804 3805 /* 3806 * Removes a device from the thread if_list. 3807 */ 3808 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3809 struct pktgen_dev *pkt_dev) 3810 { 3811 struct list_head *q, *n; 3812 struct pktgen_dev *p; 3813 3814 list_for_each_safe(q, n, &t->if_list) { 3815 p = list_entry(q, struct pktgen_dev, list); 3816 if (p == pkt_dev) 3817 list_del(&p->list); 3818 } 3819 } 3820 3821 static int pktgen_remove_device(struct pktgen_thread *t, 3822 struct pktgen_dev *pkt_dev) 3823 { 3824 3825 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev); 3826 3827 if (pkt_dev->running) { 3828 printk(KERN_WARNING "pktgen: WARNING: trying to remove a " 3829 "running interface, stopping it now.\n"); 3830 pktgen_stop_device(pkt_dev); 3831 } 3832 3833 /* Dis-associate from the interface */ 3834 3835 if (pkt_dev->odev) { 3836 dev_put(pkt_dev->odev); 3837 pkt_dev->odev = NULL; 3838 } 3839 3840 /* And update the thread if_list */ 3841 3842 _rem_dev_from_if_list(t, pkt_dev); 3843 3844 if (pkt_dev->entry) 3845 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 3846 3847 #ifdef CONFIG_XFRM 3848 free_SAs(pkt_dev); 3849 #endif 3850 vfree(pkt_dev->flows); 3851 kfree(pkt_dev); 3852 return 0; 3853 } 3854 3855 static int __init pg_init(void) 3856 { 3857 int cpu; 3858 struct proc_dir_entry *pe; 3859 3860 printk(KERN_INFO "%s", version); 3861 3862 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net); 3863 if (!pg_proc_dir) 3864 return -ENODEV; 3865 3866 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops); 3867 if (pe == NULL) { 3868 printk(KERN_ERR "pktgen: ERROR: cannot create %s " 3869 "procfs entry.\n", PGCTRL); 3870 proc_net_remove(&init_net, PG_PROC_DIR); 3871 return -EINVAL; 3872 } 3873 3874 /* Register us to receive netdevice events */ 3875 register_netdevice_notifier(&pktgen_notifier_block); 3876 3877 for_each_online_cpu(cpu) { 3878 int err; 3879 3880 err = pktgen_create_thread(cpu); 3881 if (err) 3882 printk(KERN_WARNING "pktgen: WARNING: Cannot create " 3883 "thread for cpu %d (%d)\n", cpu, err); 3884 } 3885 3886 if (list_empty(&pktgen_threads)) { 3887 printk(KERN_ERR "pktgen: ERROR: Initialization failed for " 3888 "all threads\n"); 3889 unregister_netdevice_notifier(&pktgen_notifier_block); 3890 remove_proc_entry(PGCTRL, pg_proc_dir); 3891 proc_net_remove(&init_net, PG_PROC_DIR); 3892 return -ENODEV; 3893 } 3894 3895 return 0; 3896 } 3897 3898 static void __exit pg_cleanup(void) 3899 { 3900 struct pktgen_thread *t; 3901 struct list_head *q, *n; 3902 wait_queue_head_t queue; 3903 init_waitqueue_head(&queue); 3904 3905 /* Stop all interfaces & threads */ 3906 3907 list_for_each_safe(q, n, &pktgen_threads) { 3908 t = list_entry(q, struct pktgen_thread, th_list); 3909 kthread_stop(t->tsk); 3910 kfree(t); 3911 } 3912 3913 /* Un-register us from receiving netdevice events */ 3914 unregister_netdevice_notifier(&pktgen_notifier_block); 3915 3916 /* Clean up proc file system */ 3917 remove_proc_entry(PGCTRL, pg_proc_dir); 3918 proc_net_remove(&init_net, PG_PROC_DIR); 3919 } 3920 3921 module_init(pg_init); 3922 module_exit(pg_cleanup); 3923 3924 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); 3925 MODULE_DESCRIPTION("Packet Generator tool"); 3926 MODULE_LICENSE("GPL"); 3927 MODULE_VERSION(VERSION); 3928 module_param(pg_count_d, int, 0); 3929 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); 3930 module_param(pg_delay_d, int, 0); 3931 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); 3932 module_param(pg_clone_skb_d, int, 0); 3933 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); 3934 module_param(debug, int, 0); 3935 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); 3936