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 */ 118 119 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 120 121 #include <linux/sys.h> 122 #include <linux/types.h> 123 #include <linux/module.h> 124 #include <linux/moduleparam.h> 125 #include <linux/kernel.h> 126 #include <linux/mutex.h> 127 #include <linux/sched.h> 128 #include <linux/slab.h> 129 #include <linux/vmalloc.h> 130 #include <linux/unistd.h> 131 #include <linux/string.h> 132 #include <linux/ptrace.h> 133 #include <linux/errno.h> 134 #include <linux/ioport.h> 135 #include <linux/interrupt.h> 136 #include <linux/capability.h> 137 #include <linux/hrtimer.h> 138 #include <linux/freezer.h> 139 #include <linux/delay.h> 140 #include <linux/timer.h> 141 #include <linux/list.h> 142 #include <linux/init.h> 143 #include <linux/skbuff.h> 144 #include <linux/netdevice.h> 145 #include <linux/inet.h> 146 #include <linux/inetdevice.h> 147 #include <linux/rtnetlink.h> 148 #include <linux/if_arp.h> 149 #include <linux/if_vlan.h> 150 #include <linux/in.h> 151 #include <linux/ip.h> 152 #include <linux/ipv6.h> 153 #include <linux/udp.h> 154 #include <linux/proc_fs.h> 155 #include <linux/seq_file.h> 156 #include <linux/wait.h> 157 #include <linux/etherdevice.h> 158 #include <linux/kthread.h> 159 #include <net/net_namespace.h> 160 #include <net/checksum.h> 161 #include <net/ipv6.h> 162 #include <net/addrconf.h> 163 #ifdef CONFIG_XFRM 164 #include <net/xfrm.h> 165 #endif 166 #include <asm/byteorder.h> 167 #include <linux/rcupdate.h> 168 #include <linux/bitops.h> 169 #include <linux/io.h> 170 #include <linux/timex.h> 171 #include <linux/uaccess.h> 172 #include <asm/dma.h> 173 #include <asm/div64.h> /* do_div */ 174 175 #define VERSION "2.74" 176 #define IP_NAME_SZ 32 177 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */ 178 #define MPLS_STACK_BOTTOM htonl(0x00000100) 179 180 #define func_enter() pr_debug("entering %s\n", __func__); 181 182 /* Device flag bits */ 183 #define F_IPSRC_RND (1<<0) /* IP-Src Random */ 184 #define F_IPDST_RND (1<<1) /* IP-Dst Random */ 185 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */ 186 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */ 187 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */ 188 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */ 189 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */ 190 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */ 191 #define F_MPLS_RND (1<<8) /* Random MPLS labels */ 192 #define F_VID_RND (1<<9) /* Random VLAN ID */ 193 #define F_SVID_RND (1<<10) /* Random SVLAN ID */ 194 #define F_FLOW_SEQ (1<<11) /* Sequential flows */ 195 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */ 196 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */ 197 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */ 198 #define F_NODE (1<<15) /* Node memory alloc*/ 199 200 /* Thread control flag bits */ 201 #define T_STOP (1<<0) /* Stop run */ 202 #define T_RUN (1<<1) /* Start run */ 203 #define T_REMDEVALL (1<<2) /* Remove all devs */ 204 #define T_REMDEV (1<<3) /* Remove one dev */ 205 206 /* If lock -- can be removed after some work */ 207 #define if_lock(t) spin_lock(&(t->if_lock)); 208 #define if_unlock(t) spin_unlock(&(t->if_lock)); 209 210 /* Used to help with determining the pkts on receive */ 211 #define PKTGEN_MAGIC 0xbe9be955 212 #define PG_PROC_DIR "pktgen" 213 #define PGCTRL "pgctrl" 214 static struct proc_dir_entry *pg_proc_dir; 215 216 #define MAX_CFLOWS 65536 217 218 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4) 219 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4) 220 221 struct flow_state { 222 __be32 cur_daddr; 223 int count; 224 #ifdef CONFIG_XFRM 225 struct xfrm_state *x; 226 #endif 227 __u32 flags; 228 }; 229 230 /* flow flag bits */ 231 #define F_INIT (1<<0) /* flow has been initialized */ 232 233 struct pktgen_dev { 234 /* 235 * Try to keep frequent/infrequent used vars. separated. 236 */ 237 struct proc_dir_entry *entry; /* proc file */ 238 struct pktgen_thread *pg_thread;/* the owner */ 239 struct list_head list; /* chaining in the thread's run-queue */ 240 241 int running; /* if false, the test will stop */ 242 243 /* If min != max, then we will either do a linear iteration, or 244 * we will do a random selection from within the range. 245 */ 246 __u32 flags; 247 int removal_mark; /* non-zero => the device is marked for 248 * removal by worker thread */ 249 250 int min_pkt_size; /* = ETH_ZLEN; */ 251 int max_pkt_size; /* = ETH_ZLEN; */ 252 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */ 253 int nfrags; 254 u64 delay; /* nano-seconds */ 255 256 __u64 count; /* Default No packets to send */ 257 __u64 sofar; /* How many pkts we've sent so far */ 258 __u64 tx_bytes; /* How many bytes we've transmitted */ 259 __u64 errors; /* Errors when trying to transmit, */ 260 261 /* runtime counters relating to clone_skb */ 262 263 __u64 allocated_skbs; 264 __u32 clone_count; 265 int last_ok; /* Was last skb sent? 266 * Or a failed transmit of some sort? 267 * This will keep sequence numbers in order 268 */ 269 ktime_t next_tx; 270 ktime_t started_at; 271 ktime_t stopped_at; 272 u64 idle_acc; /* nano-seconds */ 273 274 __u32 seq_num; 275 276 int clone_skb; /* 277 * Use multiple SKBs during packet gen. 278 * If this number is greater than 1, then 279 * that many copies of the same packet will be 280 * sent before a new packet is allocated. 281 * If you want to send 1024 identical packets 282 * before creating a new packet, 283 * set clone_skb to 1024. 284 */ 285 286 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 287 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 288 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 289 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 290 291 struct in6_addr in6_saddr; 292 struct in6_addr in6_daddr; 293 struct in6_addr cur_in6_daddr; 294 struct in6_addr cur_in6_saddr; 295 /* For ranges */ 296 struct in6_addr min_in6_daddr; 297 struct in6_addr max_in6_daddr; 298 struct in6_addr min_in6_saddr; 299 struct in6_addr max_in6_saddr; 300 301 /* If we're doing ranges, random or incremental, then this 302 * defines the min/max for those ranges. 303 */ 304 __be32 saddr_min; /* inclusive, source IP address */ 305 __be32 saddr_max; /* exclusive, source IP address */ 306 __be32 daddr_min; /* inclusive, dest IP address */ 307 __be32 daddr_max; /* exclusive, dest IP address */ 308 309 __u16 udp_src_min; /* inclusive, source UDP port */ 310 __u16 udp_src_max; /* exclusive, source UDP port */ 311 __u16 udp_dst_min; /* inclusive, dest UDP port */ 312 __u16 udp_dst_max; /* exclusive, dest UDP port */ 313 314 /* DSCP + ECN */ 315 __u8 tos; /* six MSB of (former) IPv4 TOS 316 are for dscp codepoint */ 317 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 318 (see RFC 3260, sec. 4) */ 319 320 /* MPLS */ 321 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */ 322 __be32 labels[MAX_MPLS_LABELS]; 323 324 /* VLAN/SVLAN (802.1Q/Q-in-Q) */ 325 __u8 vlan_p; 326 __u8 vlan_cfi; 327 __u16 vlan_id; /* 0xffff means no vlan tag */ 328 329 __u8 svlan_p; 330 __u8 svlan_cfi; 331 __u16 svlan_id; /* 0xffff means no svlan tag */ 332 333 __u32 src_mac_count; /* How many MACs to iterate through */ 334 __u32 dst_mac_count; /* How many MACs to iterate through */ 335 336 unsigned char dst_mac[ETH_ALEN]; 337 unsigned char src_mac[ETH_ALEN]; 338 339 __u32 cur_dst_mac_offset; 340 __u32 cur_src_mac_offset; 341 __be32 cur_saddr; 342 __be32 cur_daddr; 343 __u16 ip_id; 344 __u16 cur_udp_dst; 345 __u16 cur_udp_src; 346 __u16 cur_queue_map; 347 __u32 cur_pkt_size; 348 __u32 last_pkt_size; 349 350 __u8 hh[14]; 351 /* = { 352 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, 353 354 We fill in SRC address later 355 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 356 0x08, 0x00 357 }; 358 */ 359 __u16 pad; /* pad out the hh struct to an even 16 bytes */ 360 361 struct sk_buff *skb; /* skb we are to transmit next, used for when we 362 * are transmitting the same one multiple times 363 */ 364 struct net_device *odev; /* The out-going device. 365 * Note that the device should have it's 366 * pg_info pointer pointing back to this 367 * device. 368 * Set when the user specifies the out-going 369 * device name (not when the inject is 370 * started as it used to do.) 371 */ 372 char odevname[32]; 373 struct flow_state *flows; 374 unsigned cflows; /* Concurrent flows (config) */ 375 unsigned lflow; /* Flow length (config) */ 376 unsigned nflows; /* accumulated flows (stats) */ 377 unsigned curfl; /* current sequenced flow (state)*/ 378 379 u16 queue_map_min; 380 u16 queue_map_max; 381 __u32 skb_priority; /* skb priority field */ 382 int node; /* Memory node */ 383 384 #ifdef CONFIG_XFRM 385 __u8 ipsmode; /* IPSEC mode (config) */ 386 __u8 ipsproto; /* IPSEC type (config) */ 387 #endif 388 char result[512]; 389 }; 390 391 struct pktgen_hdr { 392 __be32 pgh_magic; 393 __be32 seq_num; 394 __be32 tv_sec; 395 __be32 tv_usec; 396 }; 397 398 struct pktgen_thread { 399 spinlock_t if_lock; /* for list of devices */ 400 struct list_head if_list; /* All device here */ 401 struct list_head th_list; 402 struct task_struct *tsk; 403 char result[512]; 404 405 /* Field for thread to receive "posted" events terminate, 406 stop ifs etc. */ 407 408 u32 control; 409 int cpu; 410 411 wait_queue_head_t queue; 412 struct completion start_done; 413 }; 414 415 #define REMOVE 1 416 #define FIND 0 417 418 static inline ktime_t ktime_now(void) 419 { 420 struct timespec ts; 421 ktime_get_ts(&ts); 422 423 return timespec_to_ktime(ts); 424 } 425 426 /* This works even if 32 bit because of careful byte order choice */ 427 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2) 428 { 429 return cmp1.tv64 < cmp2.tv64; 430 } 431 432 static const char version[] = 433 "Packet Generator for packet performance testing. " 434 "Version: " VERSION "\n"; 435 436 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i); 437 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname); 438 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 439 const char *ifname, bool exact); 440 static int pktgen_device_event(struct notifier_block *, unsigned long, void *); 441 static void pktgen_run_all_threads(void); 442 static void pktgen_reset_all_threads(void); 443 static void pktgen_stop_all_threads_ifs(void); 444 445 static void pktgen_stop(struct pktgen_thread *t); 446 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); 447 448 static unsigned int scan_ip6(const char *s, char ip[16]); 449 static unsigned int fmt_ip6(char *s, const char ip[16]); 450 451 /* Module parameters, defaults. */ 452 static int pg_count_d __read_mostly = 1000; 453 static int pg_delay_d __read_mostly; 454 static int pg_clone_skb_d __read_mostly; 455 static int debug __read_mostly; 456 457 static DEFINE_MUTEX(pktgen_thread_lock); 458 static LIST_HEAD(pktgen_threads); 459 460 static struct notifier_block pktgen_notifier_block = { 461 .notifier_call = pktgen_device_event, 462 }; 463 464 /* 465 * /proc handling functions 466 * 467 */ 468 469 static int pgctrl_show(struct seq_file *seq, void *v) 470 { 471 seq_puts(seq, version); 472 return 0; 473 } 474 475 static ssize_t pgctrl_write(struct file *file, const char __user *buf, 476 size_t count, loff_t *ppos) 477 { 478 int err = 0; 479 char data[128]; 480 481 if (!capable(CAP_NET_ADMIN)) { 482 err = -EPERM; 483 goto out; 484 } 485 486 if (count > sizeof(data)) 487 count = sizeof(data); 488 489 if (copy_from_user(data, buf, count)) { 490 err = -EFAULT; 491 goto out; 492 } 493 data[count - 1] = 0; /* Make string */ 494 495 if (!strcmp(data, "stop")) 496 pktgen_stop_all_threads_ifs(); 497 498 else if (!strcmp(data, "start")) 499 pktgen_run_all_threads(); 500 501 else if (!strcmp(data, "reset")) 502 pktgen_reset_all_threads(); 503 504 else 505 pr_warning("Unknown command: %s\n", data); 506 507 err = count; 508 509 out: 510 return err; 511 } 512 513 static int pgctrl_open(struct inode *inode, struct file *file) 514 { 515 return single_open(file, pgctrl_show, PDE(inode)->data); 516 } 517 518 static const struct file_operations pktgen_fops = { 519 .owner = THIS_MODULE, 520 .open = pgctrl_open, 521 .read = seq_read, 522 .llseek = seq_lseek, 523 .write = pgctrl_write, 524 .release = single_release, 525 }; 526 527 static int pktgen_if_show(struct seq_file *seq, void *v) 528 { 529 const struct pktgen_dev *pkt_dev = seq->private; 530 ktime_t stopped; 531 u64 idle; 532 533 seq_printf(seq, 534 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", 535 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, 536 pkt_dev->max_pkt_size); 537 538 seq_printf(seq, 539 " frags: %d delay: %llu clone_skb: %d ifname: %s\n", 540 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay, 541 pkt_dev->clone_skb, pkt_dev->odevname); 542 543 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, 544 pkt_dev->lflow); 545 546 seq_printf(seq, 547 " queue_map_min: %u queue_map_max: %u\n", 548 pkt_dev->queue_map_min, 549 pkt_dev->queue_map_max); 550 551 if (pkt_dev->skb_priority) 552 seq_printf(seq, " skb_priority: %u\n", 553 pkt_dev->skb_priority); 554 555 if (pkt_dev->flags & F_IPV6) { 556 char b1[128], b2[128], b3[128]; 557 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr); 558 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr); 559 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr); 560 seq_printf(seq, 561 " saddr: %s min_saddr: %s max_saddr: %s\n", b1, 562 b2, b3); 563 564 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr); 565 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr); 566 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr); 567 seq_printf(seq, 568 " daddr: %s min_daddr: %s max_daddr: %s\n", b1, 569 b2, b3); 570 571 } else { 572 seq_printf(seq, 573 " dst_min: %s dst_max: %s\n", 574 pkt_dev->dst_min, pkt_dev->dst_max); 575 seq_printf(seq, 576 " src_min: %s src_max: %s\n", 577 pkt_dev->src_min, pkt_dev->src_max); 578 } 579 580 seq_puts(seq, " src_mac: "); 581 582 seq_printf(seq, "%pM ", 583 is_zero_ether_addr(pkt_dev->src_mac) ? 584 pkt_dev->odev->dev_addr : pkt_dev->src_mac); 585 586 seq_printf(seq, "dst_mac: "); 587 seq_printf(seq, "%pM\n", pkt_dev->dst_mac); 588 589 seq_printf(seq, 590 " udp_src_min: %d udp_src_max: %d" 591 " udp_dst_min: %d udp_dst_max: %d\n", 592 pkt_dev->udp_src_min, pkt_dev->udp_src_max, 593 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); 594 595 seq_printf(seq, 596 " src_mac_count: %d dst_mac_count: %d\n", 597 pkt_dev->src_mac_count, pkt_dev->dst_mac_count); 598 599 if (pkt_dev->nr_labels) { 600 unsigned i; 601 seq_printf(seq, " mpls: "); 602 for (i = 0; i < pkt_dev->nr_labels; i++) 603 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), 604 i == pkt_dev->nr_labels-1 ? "\n" : ", "); 605 } 606 607 if (pkt_dev->vlan_id != 0xffff) 608 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", 609 pkt_dev->vlan_id, pkt_dev->vlan_p, 610 pkt_dev->vlan_cfi); 611 612 if (pkt_dev->svlan_id != 0xffff) 613 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", 614 pkt_dev->svlan_id, pkt_dev->svlan_p, 615 pkt_dev->svlan_cfi); 616 617 if (pkt_dev->tos) 618 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); 619 620 if (pkt_dev->traffic_class) 621 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); 622 623 if (pkt_dev->node >= 0) 624 seq_printf(seq, " node: %d\n", pkt_dev->node); 625 626 seq_printf(seq, " Flags: "); 627 628 if (pkt_dev->flags & F_IPV6) 629 seq_printf(seq, "IPV6 "); 630 631 if (pkt_dev->flags & F_IPSRC_RND) 632 seq_printf(seq, "IPSRC_RND "); 633 634 if (pkt_dev->flags & F_IPDST_RND) 635 seq_printf(seq, "IPDST_RND "); 636 637 if (pkt_dev->flags & F_TXSIZE_RND) 638 seq_printf(seq, "TXSIZE_RND "); 639 640 if (pkt_dev->flags & F_UDPSRC_RND) 641 seq_printf(seq, "UDPSRC_RND "); 642 643 if (pkt_dev->flags & F_UDPDST_RND) 644 seq_printf(seq, "UDPDST_RND "); 645 646 if (pkt_dev->flags & F_MPLS_RND) 647 seq_printf(seq, "MPLS_RND "); 648 649 if (pkt_dev->flags & F_QUEUE_MAP_RND) 650 seq_printf(seq, "QUEUE_MAP_RND "); 651 652 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 653 seq_printf(seq, "QUEUE_MAP_CPU "); 654 655 if (pkt_dev->cflows) { 656 if (pkt_dev->flags & F_FLOW_SEQ) 657 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/ 658 else 659 seq_printf(seq, "FLOW_RND "); 660 } 661 662 #ifdef CONFIG_XFRM 663 if (pkt_dev->flags & F_IPSEC_ON) 664 seq_printf(seq, "IPSEC "); 665 #endif 666 667 if (pkt_dev->flags & F_MACSRC_RND) 668 seq_printf(seq, "MACSRC_RND "); 669 670 if (pkt_dev->flags & F_MACDST_RND) 671 seq_printf(seq, "MACDST_RND "); 672 673 if (pkt_dev->flags & F_VID_RND) 674 seq_printf(seq, "VID_RND "); 675 676 if (pkt_dev->flags & F_SVID_RND) 677 seq_printf(seq, "SVID_RND "); 678 679 if (pkt_dev->flags & F_NODE) 680 seq_printf(seq, "NODE_ALLOC "); 681 682 seq_puts(seq, "\n"); 683 684 /* not really stopped, more like last-running-at */ 685 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at; 686 idle = pkt_dev->idle_acc; 687 do_div(idle, NSEC_PER_USEC); 688 689 seq_printf(seq, 690 "Current:\n pkts-sofar: %llu errors: %llu\n", 691 (unsigned long long)pkt_dev->sofar, 692 (unsigned long long)pkt_dev->errors); 693 694 seq_printf(seq, 695 " started: %lluus stopped: %lluus idle: %lluus\n", 696 (unsigned long long) ktime_to_us(pkt_dev->started_at), 697 (unsigned long long) ktime_to_us(stopped), 698 (unsigned long long) idle); 699 700 seq_printf(seq, 701 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 702 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, 703 pkt_dev->cur_src_mac_offset); 704 705 if (pkt_dev->flags & F_IPV6) { 706 char b1[128], b2[128]; 707 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr); 708 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr); 709 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1); 710 } else 711 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n", 712 pkt_dev->cur_saddr, pkt_dev->cur_daddr); 713 714 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", 715 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 716 717 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); 718 719 seq_printf(seq, " flows: %u\n", pkt_dev->nflows); 720 721 if (pkt_dev->result[0]) 722 seq_printf(seq, "Result: %s\n", pkt_dev->result); 723 else 724 seq_printf(seq, "Result: Idle\n"); 725 726 return 0; 727 } 728 729 730 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, 731 __u32 *num) 732 { 733 int i = 0; 734 *num = 0; 735 736 for (; i < maxlen; i++) { 737 int value; 738 char c; 739 *num <<= 4; 740 if (get_user(c, &user_buffer[i])) 741 return -EFAULT; 742 value = hex_to_bin(c); 743 if (value >= 0) 744 *num |= value; 745 else 746 break; 747 } 748 return i; 749 } 750 751 static int count_trail_chars(const char __user * user_buffer, 752 unsigned int maxlen) 753 { 754 int i; 755 756 for (i = 0; i < maxlen; i++) { 757 char c; 758 if (get_user(c, &user_buffer[i])) 759 return -EFAULT; 760 switch (c) { 761 case '\"': 762 case '\n': 763 case '\r': 764 case '\t': 765 case ' ': 766 case '=': 767 break; 768 default: 769 goto done; 770 } 771 } 772 done: 773 return i; 774 } 775 776 static unsigned long num_arg(const char __user * user_buffer, 777 unsigned long maxlen, unsigned long *num) 778 { 779 int i; 780 *num = 0; 781 782 for (i = 0; i < maxlen; i++) { 783 char c; 784 if (get_user(c, &user_buffer[i])) 785 return -EFAULT; 786 if ((c >= '0') && (c <= '9')) { 787 *num *= 10; 788 *num += c - '0'; 789 } else 790 break; 791 } 792 return i; 793 } 794 795 static int strn_len(const char __user * user_buffer, unsigned int maxlen) 796 { 797 int i; 798 799 for (i = 0; i < maxlen; i++) { 800 char c; 801 if (get_user(c, &user_buffer[i])) 802 return -EFAULT; 803 switch (c) { 804 case '\"': 805 case '\n': 806 case '\r': 807 case '\t': 808 case ' ': 809 goto done_str; 810 break; 811 default: 812 break; 813 } 814 } 815 done_str: 816 return i; 817 } 818 819 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) 820 { 821 unsigned n = 0; 822 char c; 823 ssize_t i = 0; 824 int len; 825 826 pkt_dev->nr_labels = 0; 827 do { 828 __u32 tmp; 829 len = hex32_arg(&buffer[i], 8, &tmp); 830 if (len <= 0) 831 return len; 832 pkt_dev->labels[n] = htonl(tmp); 833 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 834 pkt_dev->flags |= F_MPLS_RND; 835 i += len; 836 if (get_user(c, &buffer[i])) 837 return -EFAULT; 838 i++; 839 n++; 840 if (n >= MAX_MPLS_LABELS) 841 return -E2BIG; 842 } while (c == ','); 843 844 pkt_dev->nr_labels = n; 845 return i; 846 } 847 848 static ssize_t pktgen_if_write(struct file *file, 849 const char __user * user_buffer, size_t count, 850 loff_t * offset) 851 { 852 struct seq_file *seq = file->private_data; 853 struct pktgen_dev *pkt_dev = seq->private; 854 int i, max, len; 855 char name[16], valstr[32]; 856 unsigned long value = 0; 857 char *pg_result = NULL; 858 int tmp = 0; 859 char buf[128]; 860 861 pg_result = &(pkt_dev->result[0]); 862 863 if (count < 1) { 864 pr_warning("wrong command format\n"); 865 return -EINVAL; 866 } 867 868 max = count; 869 tmp = count_trail_chars(user_buffer, max); 870 if (tmp < 0) { 871 pr_warning("illegal format\n"); 872 return tmp; 873 } 874 i = tmp; 875 876 /* Read variable name */ 877 878 len = strn_len(&user_buffer[i], sizeof(name) - 1); 879 if (len < 0) 880 return len; 881 882 memset(name, 0, sizeof(name)); 883 if (copy_from_user(name, &user_buffer[i], len)) 884 return -EFAULT; 885 i += len; 886 887 max = count - i; 888 len = count_trail_chars(&user_buffer[i], max); 889 if (len < 0) 890 return len; 891 892 i += len; 893 894 if (debug) { 895 size_t copy = min_t(size_t, count, 1023); 896 char tb[copy + 1]; 897 if (copy_from_user(tb, user_buffer, copy)) 898 return -EFAULT; 899 tb[copy] = 0; 900 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name, 901 (unsigned long)count, tb); 902 } 903 904 if (!strcmp(name, "min_pkt_size")) { 905 len = num_arg(&user_buffer[i], 10, &value); 906 if (len < 0) 907 return len; 908 909 i += len; 910 if (value < 14 + 20 + 8) 911 value = 14 + 20 + 8; 912 if (value != pkt_dev->min_pkt_size) { 913 pkt_dev->min_pkt_size = value; 914 pkt_dev->cur_pkt_size = value; 915 } 916 sprintf(pg_result, "OK: min_pkt_size=%u", 917 pkt_dev->min_pkt_size); 918 return count; 919 } 920 921 if (!strcmp(name, "max_pkt_size")) { 922 len = num_arg(&user_buffer[i], 10, &value); 923 if (len < 0) 924 return len; 925 926 i += len; 927 if (value < 14 + 20 + 8) 928 value = 14 + 20 + 8; 929 if (value != pkt_dev->max_pkt_size) { 930 pkt_dev->max_pkt_size = value; 931 pkt_dev->cur_pkt_size = value; 932 } 933 sprintf(pg_result, "OK: max_pkt_size=%u", 934 pkt_dev->max_pkt_size); 935 return count; 936 } 937 938 /* Shortcut for min = max */ 939 940 if (!strcmp(name, "pkt_size")) { 941 len = num_arg(&user_buffer[i], 10, &value); 942 if (len < 0) 943 return len; 944 945 i += len; 946 if (value < 14 + 20 + 8) 947 value = 14 + 20 + 8; 948 if (value != pkt_dev->min_pkt_size) { 949 pkt_dev->min_pkt_size = value; 950 pkt_dev->max_pkt_size = value; 951 pkt_dev->cur_pkt_size = value; 952 } 953 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 954 return count; 955 } 956 957 if (!strcmp(name, "debug")) { 958 len = num_arg(&user_buffer[i], 10, &value); 959 if (len < 0) 960 return len; 961 962 i += len; 963 debug = value; 964 sprintf(pg_result, "OK: debug=%u", debug); 965 return count; 966 } 967 968 if (!strcmp(name, "frags")) { 969 len = num_arg(&user_buffer[i], 10, &value); 970 if (len < 0) 971 return len; 972 973 i += len; 974 pkt_dev->nfrags = value; 975 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 976 return count; 977 } 978 if (!strcmp(name, "delay")) { 979 len = num_arg(&user_buffer[i], 10, &value); 980 if (len < 0) 981 return len; 982 983 i += len; 984 if (value == 0x7FFFFFFF) 985 pkt_dev->delay = ULLONG_MAX; 986 else 987 pkt_dev->delay = (u64)value; 988 989 sprintf(pg_result, "OK: delay=%llu", 990 (unsigned long long) pkt_dev->delay); 991 return count; 992 } 993 if (!strcmp(name, "rate")) { 994 len = num_arg(&user_buffer[i], 10, &value); 995 if (len < 0) 996 return len; 997 998 i += len; 999 if (!value) 1000 return len; 1001 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value; 1002 if (debug) 1003 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 1004 1005 sprintf(pg_result, "OK: rate=%lu", value); 1006 return count; 1007 } 1008 if (!strcmp(name, "ratep")) { 1009 len = num_arg(&user_buffer[i], 10, &value); 1010 if (len < 0) 1011 return len; 1012 1013 i += len; 1014 if (!value) 1015 return len; 1016 pkt_dev->delay = NSEC_PER_SEC/value; 1017 if (debug) 1018 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 1019 1020 sprintf(pg_result, "OK: rate=%lu", value); 1021 return count; 1022 } 1023 if (!strcmp(name, "udp_src_min")) { 1024 len = num_arg(&user_buffer[i], 10, &value); 1025 if (len < 0) 1026 return len; 1027 1028 i += len; 1029 if (value != pkt_dev->udp_src_min) { 1030 pkt_dev->udp_src_min = value; 1031 pkt_dev->cur_udp_src = value; 1032 } 1033 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 1034 return count; 1035 } 1036 if (!strcmp(name, "udp_dst_min")) { 1037 len = num_arg(&user_buffer[i], 10, &value); 1038 if (len < 0) 1039 return len; 1040 1041 i += len; 1042 if (value != pkt_dev->udp_dst_min) { 1043 pkt_dev->udp_dst_min = value; 1044 pkt_dev->cur_udp_dst = value; 1045 } 1046 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 1047 return count; 1048 } 1049 if (!strcmp(name, "udp_src_max")) { 1050 len = num_arg(&user_buffer[i], 10, &value); 1051 if (len < 0) 1052 return len; 1053 1054 i += len; 1055 if (value != pkt_dev->udp_src_max) { 1056 pkt_dev->udp_src_max = value; 1057 pkt_dev->cur_udp_src = value; 1058 } 1059 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 1060 return count; 1061 } 1062 if (!strcmp(name, "udp_dst_max")) { 1063 len = num_arg(&user_buffer[i], 10, &value); 1064 if (len < 0) 1065 return len; 1066 1067 i += len; 1068 if (value != pkt_dev->udp_dst_max) { 1069 pkt_dev->udp_dst_max = value; 1070 pkt_dev->cur_udp_dst = value; 1071 } 1072 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1073 return count; 1074 } 1075 if (!strcmp(name, "clone_skb")) { 1076 len = num_arg(&user_buffer[i], 10, &value); 1077 if (len < 0) 1078 return len; 1079 1080 i += len; 1081 pkt_dev->clone_skb = value; 1082 1083 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1084 return count; 1085 } 1086 if (!strcmp(name, "count")) { 1087 len = num_arg(&user_buffer[i], 10, &value); 1088 if (len < 0) 1089 return len; 1090 1091 i += len; 1092 pkt_dev->count = value; 1093 sprintf(pg_result, "OK: count=%llu", 1094 (unsigned long long)pkt_dev->count); 1095 return count; 1096 } 1097 if (!strcmp(name, "src_mac_count")) { 1098 len = num_arg(&user_buffer[i], 10, &value); 1099 if (len < 0) 1100 return len; 1101 1102 i += len; 1103 if (pkt_dev->src_mac_count != value) { 1104 pkt_dev->src_mac_count = value; 1105 pkt_dev->cur_src_mac_offset = 0; 1106 } 1107 sprintf(pg_result, "OK: src_mac_count=%d", 1108 pkt_dev->src_mac_count); 1109 return count; 1110 } 1111 if (!strcmp(name, "dst_mac_count")) { 1112 len = num_arg(&user_buffer[i], 10, &value); 1113 if (len < 0) 1114 return len; 1115 1116 i += len; 1117 if (pkt_dev->dst_mac_count != value) { 1118 pkt_dev->dst_mac_count = value; 1119 pkt_dev->cur_dst_mac_offset = 0; 1120 } 1121 sprintf(pg_result, "OK: dst_mac_count=%d", 1122 pkt_dev->dst_mac_count); 1123 return count; 1124 } 1125 if (!strcmp(name, "node")) { 1126 len = num_arg(&user_buffer[i], 10, &value); 1127 if (len < 0) 1128 return len; 1129 1130 i += len; 1131 1132 if (node_possible(value)) { 1133 pkt_dev->node = value; 1134 sprintf(pg_result, "OK: node=%d", pkt_dev->node); 1135 } 1136 else 1137 sprintf(pg_result, "ERROR: node not possible"); 1138 return count; 1139 } 1140 if (!strcmp(name, "flag")) { 1141 char f[32]; 1142 memset(f, 0, 32); 1143 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1144 if (len < 0) 1145 return len; 1146 1147 if (copy_from_user(f, &user_buffer[i], len)) 1148 return -EFAULT; 1149 i += len; 1150 if (strcmp(f, "IPSRC_RND") == 0) 1151 pkt_dev->flags |= F_IPSRC_RND; 1152 1153 else if (strcmp(f, "!IPSRC_RND") == 0) 1154 pkt_dev->flags &= ~F_IPSRC_RND; 1155 1156 else if (strcmp(f, "TXSIZE_RND") == 0) 1157 pkt_dev->flags |= F_TXSIZE_RND; 1158 1159 else if (strcmp(f, "!TXSIZE_RND") == 0) 1160 pkt_dev->flags &= ~F_TXSIZE_RND; 1161 1162 else if (strcmp(f, "IPDST_RND") == 0) 1163 pkt_dev->flags |= F_IPDST_RND; 1164 1165 else if (strcmp(f, "!IPDST_RND") == 0) 1166 pkt_dev->flags &= ~F_IPDST_RND; 1167 1168 else if (strcmp(f, "UDPSRC_RND") == 0) 1169 pkt_dev->flags |= F_UDPSRC_RND; 1170 1171 else if (strcmp(f, "!UDPSRC_RND") == 0) 1172 pkt_dev->flags &= ~F_UDPSRC_RND; 1173 1174 else if (strcmp(f, "UDPDST_RND") == 0) 1175 pkt_dev->flags |= F_UDPDST_RND; 1176 1177 else if (strcmp(f, "!UDPDST_RND") == 0) 1178 pkt_dev->flags &= ~F_UDPDST_RND; 1179 1180 else if (strcmp(f, "MACSRC_RND") == 0) 1181 pkt_dev->flags |= F_MACSRC_RND; 1182 1183 else if (strcmp(f, "!MACSRC_RND") == 0) 1184 pkt_dev->flags &= ~F_MACSRC_RND; 1185 1186 else if (strcmp(f, "MACDST_RND") == 0) 1187 pkt_dev->flags |= F_MACDST_RND; 1188 1189 else if (strcmp(f, "!MACDST_RND") == 0) 1190 pkt_dev->flags &= ~F_MACDST_RND; 1191 1192 else if (strcmp(f, "MPLS_RND") == 0) 1193 pkt_dev->flags |= F_MPLS_RND; 1194 1195 else if (strcmp(f, "!MPLS_RND") == 0) 1196 pkt_dev->flags &= ~F_MPLS_RND; 1197 1198 else if (strcmp(f, "VID_RND") == 0) 1199 pkt_dev->flags |= F_VID_RND; 1200 1201 else if (strcmp(f, "!VID_RND") == 0) 1202 pkt_dev->flags &= ~F_VID_RND; 1203 1204 else if (strcmp(f, "SVID_RND") == 0) 1205 pkt_dev->flags |= F_SVID_RND; 1206 1207 else if (strcmp(f, "!SVID_RND") == 0) 1208 pkt_dev->flags &= ~F_SVID_RND; 1209 1210 else if (strcmp(f, "FLOW_SEQ") == 0) 1211 pkt_dev->flags |= F_FLOW_SEQ; 1212 1213 else if (strcmp(f, "QUEUE_MAP_RND") == 0) 1214 pkt_dev->flags |= F_QUEUE_MAP_RND; 1215 1216 else if (strcmp(f, "!QUEUE_MAP_RND") == 0) 1217 pkt_dev->flags &= ~F_QUEUE_MAP_RND; 1218 1219 else if (strcmp(f, "QUEUE_MAP_CPU") == 0) 1220 pkt_dev->flags |= F_QUEUE_MAP_CPU; 1221 1222 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0) 1223 pkt_dev->flags &= ~F_QUEUE_MAP_CPU; 1224 #ifdef CONFIG_XFRM 1225 else if (strcmp(f, "IPSEC") == 0) 1226 pkt_dev->flags |= F_IPSEC_ON; 1227 #endif 1228 1229 else if (strcmp(f, "!IPV6") == 0) 1230 pkt_dev->flags &= ~F_IPV6; 1231 1232 else if (strcmp(f, "NODE_ALLOC") == 0) 1233 pkt_dev->flags |= F_NODE; 1234 1235 else if (strcmp(f, "!NODE_ALLOC") == 0) 1236 pkt_dev->flags &= ~F_NODE; 1237 1238 else { 1239 sprintf(pg_result, 1240 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1241 f, 1242 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1243 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n"); 1244 return count; 1245 } 1246 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1247 return count; 1248 } 1249 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1250 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1251 if (len < 0) 1252 return len; 1253 1254 if (copy_from_user(buf, &user_buffer[i], len)) 1255 return -EFAULT; 1256 buf[len] = 0; 1257 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1258 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1259 strncpy(pkt_dev->dst_min, buf, len); 1260 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1261 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1262 } 1263 if (debug) 1264 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n", 1265 pkt_dev->dst_min); 1266 i += len; 1267 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1268 return count; 1269 } 1270 if (!strcmp(name, "dst_max")) { 1271 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1272 if (len < 0) 1273 return len; 1274 1275 1276 if (copy_from_user(buf, &user_buffer[i], len)) 1277 return -EFAULT; 1278 1279 buf[len] = 0; 1280 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1281 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1282 strncpy(pkt_dev->dst_max, buf, len); 1283 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1284 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1285 } 1286 if (debug) 1287 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n", 1288 pkt_dev->dst_max); 1289 i += len; 1290 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1291 return count; 1292 } 1293 if (!strcmp(name, "dst6")) { 1294 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1295 if (len < 0) 1296 return len; 1297 1298 pkt_dev->flags |= F_IPV6; 1299 1300 if (copy_from_user(buf, &user_buffer[i], len)) 1301 return -EFAULT; 1302 buf[len] = 0; 1303 1304 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1305 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1306 1307 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr); 1308 1309 if (debug) 1310 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf); 1311 1312 i += len; 1313 sprintf(pg_result, "OK: dst6=%s", buf); 1314 return count; 1315 } 1316 if (!strcmp(name, "dst6_min")) { 1317 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1318 if (len < 0) 1319 return len; 1320 1321 pkt_dev->flags |= F_IPV6; 1322 1323 if (copy_from_user(buf, &user_buffer[i], len)) 1324 return -EFAULT; 1325 buf[len] = 0; 1326 1327 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1328 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1329 1330 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, 1331 &pkt_dev->min_in6_daddr); 1332 if (debug) 1333 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf); 1334 1335 i += len; 1336 sprintf(pg_result, "OK: dst6_min=%s", buf); 1337 return count; 1338 } 1339 if (!strcmp(name, "dst6_max")) { 1340 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1341 if (len < 0) 1342 return len; 1343 1344 pkt_dev->flags |= F_IPV6; 1345 1346 if (copy_from_user(buf, &user_buffer[i], len)) 1347 return -EFAULT; 1348 buf[len] = 0; 1349 1350 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1351 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1352 1353 if (debug) 1354 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf); 1355 1356 i += len; 1357 sprintf(pg_result, "OK: dst6_max=%s", buf); 1358 return count; 1359 } 1360 if (!strcmp(name, "src6")) { 1361 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1362 if (len < 0) 1363 return len; 1364 1365 pkt_dev->flags |= F_IPV6; 1366 1367 if (copy_from_user(buf, &user_buffer[i], len)) 1368 return -EFAULT; 1369 buf[len] = 0; 1370 1371 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1372 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1373 1374 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr); 1375 1376 if (debug) 1377 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf); 1378 1379 i += len; 1380 sprintf(pg_result, "OK: src6=%s", buf); 1381 return count; 1382 } 1383 if (!strcmp(name, "src_min")) { 1384 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1385 if (len < 0) 1386 return len; 1387 1388 if (copy_from_user(buf, &user_buffer[i], len)) 1389 return -EFAULT; 1390 buf[len] = 0; 1391 if (strcmp(buf, pkt_dev->src_min) != 0) { 1392 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1393 strncpy(pkt_dev->src_min, buf, len); 1394 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1395 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1396 } 1397 if (debug) 1398 printk(KERN_DEBUG "pktgen: src_min set to: %s\n", 1399 pkt_dev->src_min); 1400 i += len; 1401 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1402 return count; 1403 } 1404 if (!strcmp(name, "src_max")) { 1405 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1406 if (len < 0) 1407 return len; 1408 1409 if (copy_from_user(buf, &user_buffer[i], len)) 1410 return -EFAULT; 1411 buf[len] = 0; 1412 if (strcmp(buf, pkt_dev->src_max) != 0) { 1413 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1414 strncpy(pkt_dev->src_max, buf, len); 1415 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1416 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1417 } 1418 if (debug) 1419 printk(KERN_DEBUG "pktgen: src_max set to: %s\n", 1420 pkt_dev->src_max); 1421 i += len; 1422 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1423 return count; 1424 } 1425 if (!strcmp(name, "dst_mac")) { 1426 char *v = valstr; 1427 unsigned char old_dmac[ETH_ALEN]; 1428 unsigned char *m = pkt_dev->dst_mac; 1429 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN); 1430 1431 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1432 if (len < 0) 1433 return len; 1434 1435 memset(valstr, 0, sizeof(valstr)); 1436 if (copy_from_user(valstr, &user_buffer[i], len)) 1437 return -EFAULT; 1438 i += len; 1439 1440 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) { 1441 int value; 1442 1443 value = hex_to_bin(*v); 1444 if (value >= 0) 1445 *m = *m * 16 + value; 1446 1447 if (*v == ':') { 1448 m++; 1449 *m = 0; 1450 } 1451 } 1452 1453 /* Set up Dest MAC */ 1454 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac)) 1455 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 1456 1457 sprintf(pg_result, "OK: dstmac"); 1458 return count; 1459 } 1460 if (!strcmp(name, "src_mac")) { 1461 char *v = valstr; 1462 unsigned char old_smac[ETH_ALEN]; 1463 unsigned char *m = pkt_dev->src_mac; 1464 1465 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN); 1466 1467 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1468 if (len < 0) 1469 return len; 1470 1471 memset(valstr, 0, sizeof(valstr)); 1472 if (copy_from_user(valstr, &user_buffer[i], len)) 1473 return -EFAULT; 1474 i += len; 1475 1476 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) { 1477 int value; 1478 1479 value = hex_to_bin(*v); 1480 if (value >= 0) 1481 *m = *m * 16 + value; 1482 1483 if (*v == ':') { 1484 m++; 1485 *m = 0; 1486 } 1487 } 1488 1489 /* Set up Src MAC */ 1490 if (compare_ether_addr(old_smac, pkt_dev->src_mac)) 1491 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN); 1492 1493 sprintf(pg_result, "OK: srcmac"); 1494 return count; 1495 } 1496 1497 if (!strcmp(name, "clear_counters")) { 1498 pktgen_clear_counters(pkt_dev); 1499 sprintf(pg_result, "OK: Clearing counters.\n"); 1500 return count; 1501 } 1502 1503 if (!strcmp(name, "flows")) { 1504 len = num_arg(&user_buffer[i], 10, &value); 1505 if (len < 0) 1506 return len; 1507 1508 i += len; 1509 if (value > MAX_CFLOWS) 1510 value = MAX_CFLOWS; 1511 1512 pkt_dev->cflows = value; 1513 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1514 return count; 1515 } 1516 1517 if (!strcmp(name, "flowlen")) { 1518 len = num_arg(&user_buffer[i], 10, &value); 1519 if (len < 0) 1520 return len; 1521 1522 i += len; 1523 pkt_dev->lflow = value; 1524 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1525 return count; 1526 } 1527 1528 if (!strcmp(name, "queue_map_min")) { 1529 len = num_arg(&user_buffer[i], 5, &value); 1530 if (len < 0) 1531 return len; 1532 1533 i += len; 1534 pkt_dev->queue_map_min = value; 1535 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1536 return count; 1537 } 1538 1539 if (!strcmp(name, "queue_map_max")) { 1540 len = num_arg(&user_buffer[i], 5, &value); 1541 if (len < 0) 1542 return len; 1543 1544 i += len; 1545 pkt_dev->queue_map_max = value; 1546 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1547 return count; 1548 } 1549 1550 if (!strcmp(name, "mpls")) { 1551 unsigned n, cnt; 1552 1553 len = get_labels(&user_buffer[i], pkt_dev); 1554 if (len < 0) 1555 return len; 1556 i += len; 1557 cnt = sprintf(pg_result, "OK: mpls="); 1558 for (n = 0; n < pkt_dev->nr_labels; n++) 1559 cnt += sprintf(pg_result + cnt, 1560 "%08x%s", ntohl(pkt_dev->labels[n]), 1561 n == pkt_dev->nr_labels-1 ? "" : ","); 1562 1563 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1564 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1565 pkt_dev->svlan_id = 0xffff; 1566 1567 if (debug) 1568 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n"); 1569 } 1570 return count; 1571 } 1572 1573 if (!strcmp(name, "vlan_id")) { 1574 len = num_arg(&user_buffer[i], 4, &value); 1575 if (len < 0) 1576 return len; 1577 1578 i += len; 1579 if (value <= 4095) { 1580 pkt_dev->vlan_id = value; /* turn on VLAN */ 1581 1582 if (debug) 1583 printk(KERN_DEBUG "pktgen: VLAN turned on\n"); 1584 1585 if (debug && pkt_dev->nr_labels) 1586 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1587 1588 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1589 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1590 } else { 1591 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1592 pkt_dev->svlan_id = 0xffff; 1593 1594 if (debug) 1595 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1596 } 1597 return count; 1598 } 1599 1600 if (!strcmp(name, "vlan_p")) { 1601 len = num_arg(&user_buffer[i], 1, &value); 1602 if (len < 0) 1603 return len; 1604 1605 i += len; 1606 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1607 pkt_dev->vlan_p = value; 1608 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1609 } else { 1610 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1611 } 1612 return count; 1613 } 1614 1615 if (!strcmp(name, "vlan_cfi")) { 1616 len = num_arg(&user_buffer[i], 1, &value); 1617 if (len < 0) 1618 return len; 1619 1620 i += len; 1621 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1622 pkt_dev->vlan_cfi = value; 1623 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1624 } else { 1625 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1626 } 1627 return count; 1628 } 1629 1630 if (!strcmp(name, "svlan_id")) { 1631 len = num_arg(&user_buffer[i], 4, &value); 1632 if (len < 0) 1633 return len; 1634 1635 i += len; 1636 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1637 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1638 1639 if (debug) 1640 printk(KERN_DEBUG "pktgen: SVLAN turned on\n"); 1641 1642 if (debug && pkt_dev->nr_labels) 1643 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1644 1645 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1646 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1647 } else { 1648 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1649 pkt_dev->svlan_id = 0xffff; 1650 1651 if (debug) 1652 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1653 } 1654 return count; 1655 } 1656 1657 if (!strcmp(name, "svlan_p")) { 1658 len = num_arg(&user_buffer[i], 1, &value); 1659 if (len < 0) 1660 return len; 1661 1662 i += len; 1663 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1664 pkt_dev->svlan_p = value; 1665 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1666 } else { 1667 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1668 } 1669 return count; 1670 } 1671 1672 if (!strcmp(name, "svlan_cfi")) { 1673 len = num_arg(&user_buffer[i], 1, &value); 1674 if (len < 0) 1675 return len; 1676 1677 i += len; 1678 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1679 pkt_dev->svlan_cfi = value; 1680 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1681 } else { 1682 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1683 } 1684 return count; 1685 } 1686 1687 if (!strcmp(name, "tos")) { 1688 __u32 tmp_value = 0; 1689 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1690 if (len < 0) 1691 return len; 1692 1693 i += len; 1694 if (len == 2) { 1695 pkt_dev->tos = tmp_value; 1696 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1697 } else { 1698 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1699 } 1700 return count; 1701 } 1702 1703 if (!strcmp(name, "traffic_class")) { 1704 __u32 tmp_value = 0; 1705 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1706 if (len < 0) 1707 return len; 1708 1709 i += len; 1710 if (len == 2) { 1711 pkt_dev->traffic_class = tmp_value; 1712 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1713 } else { 1714 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1715 } 1716 return count; 1717 } 1718 1719 if (!strcmp(name, "skb_priority")) { 1720 len = num_arg(&user_buffer[i], 9, &value); 1721 if (len < 0) 1722 return len; 1723 1724 i += len; 1725 pkt_dev->skb_priority = value; 1726 sprintf(pg_result, "OK: skb_priority=%i", 1727 pkt_dev->skb_priority); 1728 return count; 1729 } 1730 1731 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1732 return -EINVAL; 1733 } 1734 1735 static int pktgen_if_open(struct inode *inode, struct file *file) 1736 { 1737 return single_open(file, pktgen_if_show, PDE(inode)->data); 1738 } 1739 1740 static const struct file_operations pktgen_if_fops = { 1741 .owner = THIS_MODULE, 1742 .open = pktgen_if_open, 1743 .read = seq_read, 1744 .llseek = seq_lseek, 1745 .write = pktgen_if_write, 1746 .release = single_release, 1747 }; 1748 1749 static int pktgen_thread_show(struct seq_file *seq, void *v) 1750 { 1751 struct pktgen_thread *t = seq->private; 1752 const struct pktgen_dev *pkt_dev; 1753 1754 BUG_ON(!t); 1755 1756 seq_printf(seq, "Running: "); 1757 1758 if_lock(t); 1759 list_for_each_entry(pkt_dev, &t->if_list, list) 1760 if (pkt_dev->running) 1761 seq_printf(seq, "%s ", pkt_dev->odevname); 1762 1763 seq_printf(seq, "\nStopped: "); 1764 1765 list_for_each_entry(pkt_dev, &t->if_list, list) 1766 if (!pkt_dev->running) 1767 seq_printf(seq, "%s ", pkt_dev->odevname); 1768 1769 if (t->result[0]) 1770 seq_printf(seq, "\nResult: %s\n", t->result); 1771 else 1772 seq_printf(seq, "\nResult: NA\n"); 1773 1774 if_unlock(t); 1775 1776 return 0; 1777 } 1778 1779 static ssize_t pktgen_thread_write(struct file *file, 1780 const char __user * user_buffer, 1781 size_t count, loff_t * offset) 1782 { 1783 struct seq_file *seq = file->private_data; 1784 struct pktgen_thread *t = seq->private; 1785 int i, max, len, ret; 1786 char name[40]; 1787 char *pg_result; 1788 1789 if (count < 1) { 1790 // sprintf(pg_result, "Wrong command format"); 1791 return -EINVAL; 1792 } 1793 1794 max = count; 1795 len = count_trail_chars(user_buffer, max); 1796 if (len < 0) 1797 return len; 1798 1799 i = len; 1800 1801 /* Read variable name */ 1802 1803 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1804 if (len < 0) 1805 return len; 1806 1807 memset(name, 0, sizeof(name)); 1808 if (copy_from_user(name, &user_buffer[i], len)) 1809 return -EFAULT; 1810 i += len; 1811 1812 max = count - i; 1813 len = count_trail_chars(&user_buffer[i], max); 1814 if (len < 0) 1815 return len; 1816 1817 i += len; 1818 1819 if (debug) 1820 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n", 1821 name, (unsigned long)count); 1822 1823 if (!t) { 1824 pr_err("ERROR: No thread\n"); 1825 ret = -EINVAL; 1826 goto out; 1827 } 1828 1829 pg_result = &(t->result[0]); 1830 1831 if (!strcmp(name, "add_device")) { 1832 char f[32]; 1833 memset(f, 0, 32); 1834 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1835 if (len < 0) { 1836 ret = len; 1837 goto out; 1838 } 1839 if (copy_from_user(f, &user_buffer[i], len)) 1840 return -EFAULT; 1841 i += len; 1842 mutex_lock(&pktgen_thread_lock); 1843 pktgen_add_device(t, f); 1844 mutex_unlock(&pktgen_thread_lock); 1845 ret = count; 1846 sprintf(pg_result, "OK: add_device=%s", f); 1847 goto out; 1848 } 1849 1850 if (!strcmp(name, "rem_device_all")) { 1851 mutex_lock(&pktgen_thread_lock); 1852 t->control |= T_REMDEVALL; 1853 mutex_unlock(&pktgen_thread_lock); 1854 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1855 ret = count; 1856 sprintf(pg_result, "OK: rem_device_all"); 1857 goto out; 1858 } 1859 1860 if (!strcmp(name, "max_before_softirq")) { 1861 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1862 ret = count; 1863 goto out; 1864 } 1865 1866 ret = -EINVAL; 1867 out: 1868 return ret; 1869 } 1870 1871 static int pktgen_thread_open(struct inode *inode, struct file *file) 1872 { 1873 return single_open(file, pktgen_thread_show, PDE(inode)->data); 1874 } 1875 1876 static const struct file_operations pktgen_thread_fops = { 1877 .owner = THIS_MODULE, 1878 .open = pktgen_thread_open, 1879 .read = seq_read, 1880 .llseek = seq_lseek, 1881 .write = pktgen_thread_write, 1882 .release = single_release, 1883 }; 1884 1885 /* Think find or remove for NN */ 1886 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove) 1887 { 1888 struct pktgen_thread *t; 1889 struct pktgen_dev *pkt_dev = NULL; 1890 bool exact = (remove == FIND); 1891 1892 list_for_each_entry(t, &pktgen_threads, th_list) { 1893 pkt_dev = pktgen_find_dev(t, ifname, exact); 1894 if (pkt_dev) { 1895 if (remove) { 1896 if_lock(t); 1897 pkt_dev->removal_mark = 1; 1898 t->control |= T_REMDEV; 1899 if_unlock(t); 1900 } 1901 break; 1902 } 1903 } 1904 return pkt_dev; 1905 } 1906 1907 /* 1908 * mark a device for removal 1909 */ 1910 static void pktgen_mark_device(const char *ifname) 1911 { 1912 struct pktgen_dev *pkt_dev = NULL; 1913 const int max_tries = 10, msec_per_try = 125; 1914 int i = 0; 1915 1916 mutex_lock(&pktgen_thread_lock); 1917 pr_debug("%s: marking %s for removal\n", __func__, ifname); 1918 1919 while (1) { 1920 1921 pkt_dev = __pktgen_NN_threads(ifname, REMOVE); 1922 if (pkt_dev == NULL) 1923 break; /* success */ 1924 1925 mutex_unlock(&pktgen_thread_lock); 1926 pr_debug("%s: waiting for %s to disappear....\n", 1927 __func__, ifname); 1928 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1929 mutex_lock(&pktgen_thread_lock); 1930 1931 if (++i >= max_tries) { 1932 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n", 1933 __func__, msec_per_try * i, ifname); 1934 break; 1935 } 1936 1937 } 1938 1939 mutex_unlock(&pktgen_thread_lock); 1940 } 1941 1942 static void pktgen_change_name(struct net_device *dev) 1943 { 1944 struct pktgen_thread *t; 1945 1946 list_for_each_entry(t, &pktgen_threads, th_list) { 1947 struct pktgen_dev *pkt_dev; 1948 1949 list_for_each_entry(pkt_dev, &t->if_list, list) { 1950 if (pkt_dev->odev != dev) 1951 continue; 1952 1953 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 1954 1955 pkt_dev->entry = proc_create_data(dev->name, 0600, 1956 pg_proc_dir, 1957 &pktgen_if_fops, 1958 pkt_dev); 1959 if (!pkt_dev->entry) 1960 pr_err("can't move proc entry for '%s'\n", 1961 dev->name); 1962 break; 1963 } 1964 } 1965 } 1966 1967 static int pktgen_device_event(struct notifier_block *unused, 1968 unsigned long event, void *ptr) 1969 { 1970 struct net_device *dev = ptr; 1971 1972 if (!net_eq(dev_net(dev), &init_net)) 1973 return NOTIFY_DONE; 1974 1975 /* It is OK that we do not hold the group lock right now, 1976 * as we run under the RTNL lock. 1977 */ 1978 1979 switch (event) { 1980 case NETDEV_CHANGENAME: 1981 pktgen_change_name(dev); 1982 break; 1983 1984 case NETDEV_UNREGISTER: 1985 pktgen_mark_device(dev->name); 1986 break; 1987 } 1988 1989 return NOTIFY_DONE; 1990 } 1991 1992 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev, 1993 const char *ifname) 1994 { 1995 char b[IFNAMSIZ+5]; 1996 int i; 1997 1998 for (i = 0; ifname[i] != '@'; i++) { 1999 if (i == IFNAMSIZ) 2000 break; 2001 2002 b[i] = ifname[i]; 2003 } 2004 b[i] = 0; 2005 2006 return dev_get_by_name(&init_net, b); 2007 } 2008 2009 2010 /* Associate pktgen_dev with a device. */ 2011 2012 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname) 2013 { 2014 struct net_device *odev; 2015 int err; 2016 2017 /* Clean old setups */ 2018 if (pkt_dev->odev) { 2019 dev_put(pkt_dev->odev); 2020 pkt_dev->odev = NULL; 2021 } 2022 2023 odev = pktgen_dev_get_by_name(pkt_dev, ifname); 2024 if (!odev) { 2025 pr_err("no such netdevice: \"%s\"\n", ifname); 2026 return -ENODEV; 2027 } 2028 2029 if (odev->type != ARPHRD_ETHER) { 2030 pr_err("not an ethernet device: \"%s\"\n", ifname); 2031 err = -EINVAL; 2032 } else if (!netif_running(odev)) { 2033 pr_err("device is down: \"%s\"\n", ifname); 2034 err = -ENETDOWN; 2035 } else { 2036 pkt_dev->odev = odev; 2037 return 0; 2038 } 2039 2040 dev_put(odev); 2041 return err; 2042 } 2043 2044 /* Read pkt_dev from the interface and set up internal pktgen_dev 2045 * structure to have the right information to create/send packets 2046 */ 2047 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 2048 { 2049 int ntxq; 2050 2051 if (!pkt_dev->odev) { 2052 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n"); 2053 sprintf(pkt_dev->result, 2054 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 2055 return; 2056 } 2057 2058 /* make sure that we don't pick a non-existing transmit queue */ 2059 ntxq = pkt_dev->odev->real_num_tx_queues; 2060 2061 if (ntxq <= pkt_dev->queue_map_min) { 2062 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2063 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, 2064 pkt_dev->odevname); 2065 pkt_dev->queue_map_min = ntxq - 1; 2066 } 2067 if (pkt_dev->queue_map_max >= ntxq) { 2068 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2069 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, 2070 pkt_dev->odevname); 2071 pkt_dev->queue_map_max = ntxq - 1; 2072 } 2073 2074 /* Default to the interface's mac if not explicitly set. */ 2075 2076 if (is_zero_ether_addr(pkt_dev->src_mac)) 2077 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN); 2078 2079 /* Set up Dest MAC */ 2080 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 2081 2082 /* Set up pkt size */ 2083 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2084 2085 if (pkt_dev->flags & F_IPV6) { 2086 /* 2087 * Skip this automatic address setting until locks or functions 2088 * gets exported 2089 */ 2090 2091 #ifdef NOTNOW 2092 int i, set = 0, err = 1; 2093 struct inet6_dev *idev; 2094 2095 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2096 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2097 set = 1; 2098 break; 2099 } 2100 2101 if (!set) { 2102 2103 /* 2104 * Use linklevel address if unconfigured. 2105 * 2106 * use ipv6_get_lladdr if/when it's get exported 2107 */ 2108 2109 rcu_read_lock(); 2110 idev = __in6_dev_get(pkt_dev->odev); 2111 if (idev) { 2112 struct inet6_ifaddr *ifp; 2113 2114 read_lock_bh(&idev->lock); 2115 for (ifp = idev->addr_list; ifp; 2116 ifp = ifp->if_next) { 2117 if (ifp->scope == IFA_LINK && 2118 !(ifp->flags & IFA_F_TENTATIVE)) { 2119 ipv6_addr_copy(&pkt_dev-> 2120 cur_in6_saddr, 2121 &ifp->addr); 2122 err = 0; 2123 break; 2124 } 2125 } 2126 read_unlock_bh(&idev->lock); 2127 } 2128 rcu_read_unlock(); 2129 if (err) 2130 pr_err("ERROR: IPv6 link address not available\n"); 2131 } 2132 #endif 2133 } else { 2134 pkt_dev->saddr_min = 0; 2135 pkt_dev->saddr_max = 0; 2136 if (strlen(pkt_dev->src_min) == 0) { 2137 2138 struct in_device *in_dev; 2139 2140 rcu_read_lock(); 2141 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2142 if (in_dev) { 2143 if (in_dev->ifa_list) { 2144 pkt_dev->saddr_min = 2145 in_dev->ifa_list->ifa_address; 2146 pkt_dev->saddr_max = pkt_dev->saddr_min; 2147 } 2148 } 2149 rcu_read_unlock(); 2150 } else { 2151 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2152 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2153 } 2154 2155 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2156 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2157 } 2158 /* Initialize current values. */ 2159 pkt_dev->cur_dst_mac_offset = 0; 2160 pkt_dev->cur_src_mac_offset = 0; 2161 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2162 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2163 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2164 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2165 pkt_dev->nflows = 0; 2166 } 2167 2168 2169 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) 2170 { 2171 ktime_t start_time, end_time; 2172 s64 remaining; 2173 struct hrtimer_sleeper t; 2174 2175 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); 2176 hrtimer_set_expires(&t.timer, spin_until); 2177 2178 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer)); 2179 if (remaining <= 0) { 2180 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2181 return; 2182 } 2183 2184 start_time = ktime_now(); 2185 if (remaining < 100000) 2186 ndelay(remaining); /* really small just spin */ 2187 else { 2188 /* see do_nanosleep */ 2189 hrtimer_init_sleeper(&t, current); 2190 do { 2191 set_current_state(TASK_INTERRUPTIBLE); 2192 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS); 2193 if (!hrtimer_active(&t.timer)) 2194 t.task = NULL; 2195 2196 if (likely(t.task)) 2197 schedule(); 2198 2199 hrtimer_cancel(&t.timer); 2200 } while (t.task && pkt_dev->running && !signal_pending(current)); 2201 __set_current_state(TASK_RUNNING); 2202 } 2203 end_time = ktime_now(); 2204 2205 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); 2206 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2207 } 2208 2209 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2210 { 2211 pkt_dev->pkt_overhead = 0; 2212 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2213 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2214 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2215 } 2216 2217 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) 2218 { 2219 return !!(pkt_dev->flows[flow].flags & F_INIT); 2220 } 2221 2222 static inline int f_pick(struct pktgen_dev *pkt_dev) 2223 { 2224 int flow = pkt_dev->curfl; 2225 2226 if (pkt_dev->flags & F_FLOW_SEQ) { 2227 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2228 /* reset time */ 2229 pkt_dev->flows[flow].count = 0; 2230 pkt_dev->flows[flow].flags = 0; 2231 pkt_dev->curfl += 1; 2232 if (pkt_dev->curfl >= pkt_dev->cflows) 2233 pkt_dev->curfl = 0; /*reset */ 2234 } 2235 } else { 2236 flow = random32() % pkt_dev->cflows; 2237 pkt_dev->curfl = flow; 2238 2239 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2240 pkt_dev->flows[flow].count = 0; 2241 pkt_dev->flows[flow].flags = 0; 2242 } 2243 } 2244 2245 return pkt_dev->curfl; 2246 } 2247 2248 2249 #ifdef CONFIG_XFRM 2250 /* If there was already an IPSEC SA, we keep it as is, else 2251 * we go look for it ... 2252 */ 2253 #define DUMMY_MARK 0 2254 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2255 { 2256 struct xfrm_state *x = pkt_dev->flows[flow].x; 2257 if (!x) { 2258 /*slow path: we dont already have xfrm_state*/ 2259 x = xfrm_stateonly_find(&init_net, DUMMY_MARK, 2260 (xfrm_address_t *)&pkt_dev->cur_daddr, 2261 (xfrm_address_t *)&pkt_dev->cur_saddr, 2262 AF_INET, 2263 pkt_dev->ipsmode, 2264 pkt_dev->ipsproto, 0); 2265 if (x) { 2266 pkt_dev->flows[flow].x = x; 2267 set_pkt_overhead(pkt_dev); 2268 pkt_dev->pkt_overhead += x->props.header_len; 2269 } 2270 2271 } 2272 } 2273 #endif 2274 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2275 { 2276 2277 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2278 pkt_dev->cur_queue_map = smp_processor_id(); 2279 2280 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { 2281 __u16 t; 2282 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2283 t = random32() % 2284 (pkt_dev->queue_map_max - 2285 pkt_dev->queue_map_min + 1) 2286 + pkt_dev->queue_map_min; 2287 } else { 2288 t = pkt_dev->cur_queue_map + 1; 2289 if (t > pkt_dev->queue_map_max) 2290 t = pkt_dev->queue_map_min; 2291 } 2292 pkt_dev->cur_queue_map = t; 2293 } 2294 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2295 } 2296 2297 /* Increment/randomize headers according to flags and current values 2298 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2299 */ 2300 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2301 { 2302 __u32 imn; 2303 __u32 imx; 2304 int flow = 0; 2305 2306 if (pkt_dev->cflows) 2307 flow = f_pick(pkt_dev); 2308 2309 /* Deal with source MAC */ 2310 if (pkt_dev->src_mac_count > 1) { 2311 __u32 mc; 2312 __u32 tmp; 2313 2314 if (pkt_dev->flags & F_MACSRC_RND) 2315 mc = random32() % pkt_dev->src_mac_count; 2316 else { 2317 mc = pkt_dev->cur_src_mac_offset++; 2318 if (pkt_dev->cur_src_mac_offset >= 2319 pkt_dev->src_mac_count) 2320 pkt_dev->cur_src_mac_offset = 0; 2321 } 2322 2323 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2324 pkt_dev->hh[11] = tmp; 2325 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2326 pkt_dev->hh[10] = tmp; 2327 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2328 pkt_dev->hh[9] = tmp; 2329 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2330 pkt_dev->hh[8] = tmp; 2331 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2332 pkt_dev->hh[7] = tmp; 2333 } 2334 2335 /* Deal with Destination MAC */ 2336 if (pkt_dev->dst_mac_count > 1) { 2337 __u32 mc; 2338 __u32 tmp; 2339 2340 if (pkt_dev->flags & F_MACDST_RND) 2341 mc = random32() % pkt_dev->dst_mac_count; 2342 2343 else { 2344 mc = pkt_dev->cur_dst_mac_offset++; 2345 if (pkt_dev->cur_dst_mac_offset >= 2346 pkt_dev->dst_mac_count) { 2347 pkt_dev->cur_dst_mac_offset = 0; 2348 } 2349 } 2350 2351 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2352 pkt_dev->hh[5] = tmp; 2353 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2354 pkt_dev->hh[4] = tmp; 2355 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2356 pkt_dev->hh[3] = tmp; 2357 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2358 pkt_dev->hh[2] = tmp; 2359 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2360 pkt_dev->hh[1] = tmp; 2361 } 2362 2363 if (pkt_dev->flags & F_MPLS_RND) { 2364 unsigned i; 2365 for (i = 0; i < pkt_dev->nr_labels; i++) 2366 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2367 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2368 ((__force __be32)random32() & 2369 htonl(0x000fffff)); 2370 } 2371 2372 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2373 pkt_dev->vlan_id = random32() & (4096-1); 2374 } 2375 2376 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2377 pkt_dev->svlan_id = random32() & (4096 - 1); 2378 } 2379 2380 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2381 if (pkt_dev->flags & F_UDPSRC_RND) 2382 pkt_dev->cur_udp_src = random32() % 2383 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2384 + pkt_dev->udp_src_min; 2385 2386 else { 2387 pkt_dev->cur_udp_src++; 2388 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2389 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2390 } 2391 } 2392 2393 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2394 if (pkt_dev->flags & F_UDPDST_RND) { 2395 pkt_dev->cur_udp_dst = random32() % 2396 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2397 + pkt_dev->udp_dst_min; 2398 } else { 2399 pkt_dev->cur_udp_dst++; 2400 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2401 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2402 } 2403 } 2404 2405 if (!(pkt_dev->flags & F_IPV6)) { 2406 2407 imn = ntohl(pkt_dev->saddr_min); 2408 imx = ntohl(pkt_dev->saddr_max); 2409 if (imn < imx) { 2410 __u32 t; 2411 if (pkt_dev->flags & F_IPSRC_RND) 2412 t = random32() % (imx - imn) + imn; 2413 else { 2414 t = ntohl(pkt_dev->cur_saddr); 2415 t++; 2416 if (t > imx) 2417 t = imn; 2418 2419 } 2420 pkt_dev->cur_saddr = htonl(t); 2421 } 2422 2423 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2424 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2425 } else { 2426 imn = ntohl(pkt_dev->daddr_min); 2427 imx = ntohl(pkt_dev->daddr_max); 2428 if (imn < imx) { 2429 __u32 t; 2430 __be32 s; 2431 if (pkt_dev->flags & F_IPDST_RND) { 2432 2433 t = random32() % (imx - imn) + imn; 2434 s = htonl(t); 2435 2436 while (ipv4_is_loopback(s) || 2437 ipv4_is_multicast(s) || 2438 ipv4_is_lbcast(s) || 2439 ipv4_is_zeronet(s) || 2440 ipv4_is_local_multicast(s)) { 2441 t = random32() % (imx - imn) + imn; 2442 s = htonl(t); 2443 } 2444 pkt_dev->cur_daddr = s; 2445 } else { 2446 t = ntohl(pkt_dev->cur_daddr); 2447 t++; 2448 if (t > imx) { 2449 t = imn; 2450 } 2451 pkt_dev->cur_daddr = htonl(t); 2452 } 2453 } 2454 if (pkt_dev->cflows) { 2455 pkt_dev->flows[flow].flags |= F_INIT; 2456 pkt_dev->flows[flow].cur_daddr = 2457 pkt_dev->cur_daddr; 2458 #ifdef CONFIG_XFRM 2459 if (pkt_dev->flags & F_IPSEC_ON) 2460 get_ipsec_sa(pkt_dev, flow); 2461 #endif 2462 pkt_dev->nflows++; 2463 } 2464 } 2465 } else { /* IPV6 * */ 2466 2467 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 && 2468 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 && 2469 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 && 2470 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ; 2471 else { 2472 int i; 2473 2474 /* Only random destinations yet */ 2475 2476 for (i = 0; i < 4; i++) { 2477 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2478 (((__force __be32)random32() | 2479 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2480 pkt_dev->max_in6_daddr.s6_addr32[i]); 2481 } 2482 } 2483 } 2484 2485 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2486 __u32 t; 2487 if (pkt_dev->flags & F_TXSIZE_RND) { 2488 t = random32() % 2489 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2490 + pkt_dev->min_pkt_size; 2491 } else { 2492 t = pkt_dev->cur_pkt_size + 1; 2493 if (t > pkt_dev->max_pkt_size) 2494 t = pkt_dev->min_pkt_size; 2495 } 2496 pkt_dev->cur_pkt_size = t; 2497 } 2498 2499 set_cur_queue_map(pkt_dev); 2500 2501 pkt_dev->flows[flow].count++; 2502 } 2503 2504 2505 #ifdef CONFIG_XFRM 2506 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2507 { 2508 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2509 int err = 0; 2510 struct iphdr *iph; 2511 2512 if (!x) 2513 return 0; 2514 /* XXX: we dont support tunnel mode for now until 2515 * we resolve the dst issue */ 2516 if (x->props.mode != XFRM_MODE_TRANSPORT) 2517 return 0; 2518 2519 spin_lock(&x->lock); 2520 iph = ip_hdr(skb); 2521 2522 err = x->outer_mode->output(x, skb); 2523 if (err) 2524 goto error; 2525 err = x->type->output(x, skb); 2526 if (err) 2527 goto error; 2528 2529 x->curlft.bytes += skb->len; 2530 x->curlft.packets++; 2531 error: 2532 spin_unlock(&x->lock); 2533 return err; 2534 } 2535 2536 static void free_SAs(struct pktgen_dev *pkt_dev) 2537 { 2538 if (pkt_dev->cflows) { 2539 /* let go of the SAs if we have them */ 2540 int i; 2541 for (i = 0; i < pkt_dev->cflows; i++) { 2542 struct xfrm_state *x = pkt_dev->flows[i].x; 2543 if (x) { 2544 xfrm_state_put(x); 2545 pkt_dev->flows[i].x = NULL; 2546 } 2547 } 2548 } 2549 } 2550 2551 static int process_ipsec(struct pktgen_dev *pkt_dev, 2552 struct sk_buff *skb, __be16 protocol) 2553 { 2554 if (pkt_dev->flags & F_IPSEC_ON) { 2555 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2556 int nhead = 0; 2557 if (x) { 2558 int ret; 2559 __u8 *eth; 2560 nhead = x->props.header_len - skb_headroom(skb); 2561 if (nhead > 0) { 2562 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2563 if (ret < 0) { 2564 pr_err("Error expanding ipsec packet %d\n", 2565 ret); 2566 goto err; 2567 } 2568 } 2569 2570 /* ipsec is not expecting ll header */ 2571 skb_pull(skb, ETH_HLEN); 2572 ret = pktgen_output_ipsec(skb, pkt_dev); 2573 if (ret) { 2574 pr_err("Error creating ipsec packet %d\n", ret); 2575 goto err; 2576 } 2577 /* restore ll */ 2578 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2579 memcpy(eth, pkt_dev->hh, 12); 2580 *(u16 *) ð[12] = protocol; 2581 } 2582 } 2583 return 1; 2584 err: 2585 kfree_skb(skb); 2586 return 0; 2587 } 2588 #endif 2589 2590 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2591 { 2592 unsigned i; 2593 for (i = 0; i < pkt_dev->nr_labels; i++) 2594 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2595 2596 mpls--; 2597 *mpls |= MPLS_STACK_BOTTOM; 2598 } 2599 2600 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2601 unsigned int prio) 2602 { 2603 return htons(id | (cfi << 12) | (prio << 13)); 2604 } 2605 2606 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2607 struct pktgen_dev *pkt_dev) 2608 { 2609 struct sk_buff *skb = NULL; 2610 __u8 *eth; 2611 struct udphdr *udph; 2612 int datalen, iplen; 2613 struct iphdr *iph; 2614 struct pktgen_hdr *pgh = NULL; 2615 __be16 protocol = htons(ETH_P_IP); 2616 __be32 *mpls; 2617 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2618 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2619 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2620 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2621 u16 queue_map; 2622 2623 if (pkt_dev->nr_labels) 2624 protocol = htons(ETH_P_MPLS_UC); 2625 2626 if (pkt_dev->vlan_id != 0xffff) 2627 protocol = htons(ETH_P_8021Q); 2628 2629 /* Update any of the values, used when we're incrementing various 2630 * fields. 2631 */ 2632 mod_cur_headers(pkt_dev); 2633 queue_map = pkt_dev->cur_queue_map; 2634 2635 datalen = (odev->hard_header_len + 16) & ~0xf; 2636 2637 if (pkt_dev->flags & F_NODE) { 2638 int node; 2639 2640 if (pkt_dev->node >= 0) 2641 node = pkt_dev->node; 2642 else 2643 node = numa_node_id(); 2644 2645 skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64 2646 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node); 2647 if (likely(skb)) { 2648 skb_reserve(skb, NET_SKB_PAD); 2649 skb->dev = odev; 2650 } 2651 } 2652 else 2653 skb = __netdev_alloc_skb(odev, 2654 pkt_dev->cur_pkt_size + 64 2655 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT); 2656 2657 if (!skb) { 2658 sprintf(pkt_dev->result, "No memory"); 2659 return NULL; 2660 } 2661 2662 skb_reserve(skb, datalen); 2663 2664 /* Reserve for ethernet and IP header */ 2665 eth = (__u8 *) skb_push(skb, 14); 2666 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2667 if (pkt_dev->nr_labels) 2668 mpls_push(mpls, pkt_dev); 2669 2670 if (pkt_dev->vlan_id != 0xffff) { 2671 if (pkt_dev->svlan_id != 0xffff) { 2672 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2673 *svlan_tci = build_tci(pkt_dev->svlan_id, 2674 pkt_dev->svlan_cfi, 2675 pkt_dev->svlan_p); 2676 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2677 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2678 } 2679 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2680 *vlan_tci = build_tci(pkt_dev->vlan_id, 2681 pkt_dev->vlan_cfi, 2682 pkt_dev->vlan_p); 2683 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2684 *vlan_encapsulated_proto = htons(ETH_P_IP); 2685 } 2686 2687 skb->network_header = skb->tail; 2688 skb->transport_header = skb->network_header + sizeof(struct iphdr); 2689 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr)); 2690 skb_set_queue_mapping(skb, queue_map); 2691 skb->priority = pkt_dev->skb_priority; 2692 2693 iph = ip_hdr(skb); 2694 udph = udp_hdr(skb); 2695 2696 memcpy(eth, pkt_dev->hh, 12); 2697 *(__be16 *) & eth[12] = protocol; 2698 2699 /* Eth + IPh + UDPh + mpls */ 2700 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2701 pkt_dev->pkt_overhead; 2702 if (datalen < sizeof(struct pktgen_hdr)) 2703 datalen = sizeof(struct pktgen_hdr); 2704 2705 udph->source = htons(pkt_dev->cur_udp_src); 2706 udph->dest = htons(pkt_dev->cur_udp_dst); 2707 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2708 udph->check = 0; /* No checksum */ 2709 2710 iph->ihl = 5; 2711 iph->version = 4; 2712 iph->ttl = 32; 2713 iph->tos = pkt_dev->tos; 2714 iph->protocol = IPPROTO_UDP; /* UDP */ 2715 iph->saddr = pkt_dev->cur_saddr; 2716 iph->daddr = pkt_dev->cur_daddr; 2717 iph->id = htons(pkt_dev->ip_id); 2718 pkt_dev->ip_id++; 2719 iph->frag_off = 0; 2720 iplen = 20 + 8 + datalen; 2721 iph->tot_len = htons(iplen); 2722 iph->check = 0; 2723 iph->check = ip_fast_csum((void *)iph, iph->ihl); 2724 skb->protocol = protocol; 2725 skb->mac_header = (skb->network_header - ETH_HLEN - 2726 pkt_dev->pkt_overhead); 2727 skb->dev = odev; 2728 skb->pkt_type = PACKET_HOST; 2729 2730 if (pkt_dev->nfrags <= 0) { 2731 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 2732 memset(pgh + 1, 0, datalen - sizeof(struct pktgen_hdr)); 2733 } else { 2734 int frags = pkt_dev->nfrags; 2735 int i, len; 2736 2737 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 2738 2739 if (frags > MAX_SKB_FRAGS) 2740 frags = MAX_SKB_FRAGS; 2741 if (datalen > frags * PAGE_SIZE) { 2742 len = datalen - frags * PAGE_SIZE; 2743 memset(skb_put(skb, len), 0, len); 2744 datalen = frags * PAGE_SIZE; 2745 } 2746 2747 i = 0; 2748 while (datalen > 0) { 2749 struct page *page = alloc_pages(GFP_KERNEL | __GFP_ZERO, 0); 2750 skb_shinfo(skb)->frags[i].page = page; 2751 skb_shinfo(skb)->frags[i].page_offset = 0; 2752 skb_shinfo(skb)->frags[i].size = 2753 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 2754 datalen -= skb_shinfo(skb)->frags[i].size; 2755 skb->len += skb_shinfo(skb)->frags[i].size; 2756 skb->data_len += skb_shinfo(skb)->frags[i].size; 2757 i++; 2758 skb_shinfo(skb)->nr_frags = i; 2759 } 2760 2761 while (i < frags) { 2762 int rem; 2763 2764 if (i == 0) 2765 break; 2766 2767 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 2768 if (rem == 0) 2769 break; 2770 2771 skb_shinfo(skb)->frags[i - 1].size -= rem; 2772 2773 skb_shinfo(skb)->frags[i] = 2774 skb_shinfo(skb)->frags[i - 1]; 2775 get_page(skb_shinfo(skb)->frags[i].page); 2776 skb_shinfo(skb)->frags[i].page = 2777 skb_shinfo(skb)->frags[i - 1].page; 2778 skb_shinfo(skb)->frags[i].page_offset += 2779 skb_shinfo(skb)->frags[i - 1].size; 2780 skb_shinfo(skb)->frags[i].size = rem; 2781 i++; 2782 skb_shinfo(skb)->nr_frags = i; 2783 } 2784 } 2785 2786 /* Stamp the time, and sequence number, 2787 * convert them to network byte order 2788 */ 2789 if (pgh) { 2790 struct timeval timestamp; 2791 2792 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2793 pgh->seq_num = htonl(pkt_dev->seq_num); 2794 2795 do_gettimeofday(×tamp); 2796 pgh->tv_sec = htonl(timestamp.tv_sec); 2797 pgh->tv_usec = htonl(timestamp.tv_usec); 2798 } 2799 2800 #ifdef CONFIG_XFRM 2801 if (!process_ipsec(pkt_dev, skb, protocol)) 2802 return NULL; 2803 #endif 2804 2805 return skb; 2806 } 2807 2808 /* 2809 * scan_ip6, fmt_ip taken from dietlibc-0.21 2810 * Author Felix von Leitner <felix-dietlibc@fefe.de> 2811 * 2812 * Slightly modified for kernel. 2813 * Should be candidate for net/ipv4/utils.c 2814 * --ro 2815 */ 2816 2817 static unsigned int scan_ip6(const char *s, char ip[16]) 2818 { 2819 unsigned int i; 2820 unsigned int len = 0; 2821 unsigned long u; 2822 char suffix[16]; 2823 unsigned int prefixlen = 0; 2824 unsigned int suffixlen = 0; 2825 __be32 tmp; 2826 char *pos; 2827 2828 for (i = 0; i < 16; i++) 2829 ip[i] = 0; 2830 2831 for (;;) { 2832 if (*s == ':') { 2833 len++; 2834 if (s[1] == ':') { /* Found "::", skip to part 2 */ 2835 s += 2; 2836 len++; 2837 break; 2838 } 2839 s++; 2840 } 2841 2842 u = simple_strtoul(s, &pos, 16); 2843 i = pos - s; 2844 if (!i) 2845 return 0; 2846 if (prefixlen == 12 && s[i] == '.') { 2847 2848 /* the last 4 bytes may be written as IPv4 address */ 2849 2850 tmp = in_aton(s); 2851 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp)); 2852 return i + len; 2853 } 2854 ip[prefixlen++] = (u >> 8); 2855 ip[prefixlen++] = (u & 255); 2856 s += i; 2857 len += i; 2858 if (prefixlen == 16) 2859 return len; 2860 } 2861 2862 /* part 2, after "::" */ 2863 for (;;) { 2864 if (*s == ':') { 2865 if (suffixlen == 0) 2866 break; 2867 s++; 2868 len++; 2869 } else if (suffixlen != 0) 2870 break; 2871 2872 u = simple_strtol(s, &pos, 16); 2873 i = pos - s; 2874 if (!i) { 2875 if (*s) 2876 len--; 2877 break; 2878 } 2879 if (suffixlen + prefixlen <= 12 && s[i] == '.') { 2880 tmp = in_aton(s); 2881 memcpy((struct in_addr *)(suffix + suffixlen), &tmp, 2882 sizeof(tmp)); 2883 suffixlen += 4; 2884 len += strlen(s); 2885 break; 2886 } 2887 suffix[suffixlen++] = (u >> 8); 2888 suffix[suffixlen++] = (u & 255); 2889 s += i; 2890 len += i; 2891 if (prefixlen + suffixlen == 16) 2892 break; 2893 } 2894 for (i = 0; i < suffixlen; i++) 2895 ip[16 - suffixlen + i] = suffix[i]; 2896 return len; 2897 } 2898 2899 static char tohex(char hexdigit) 2900 { 2901 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0'; 2902 } 2903 2904 static int fmt_xlong(char *s, unsigned int i) 2905 { 2906 char *bak = s; 2907 *s = tohex((i >> 12) & 0xf); 2908 if (s != bak || *s != '0') 2909 ++s; 2910 *s = tohex((i >> 8) & 0xf); 2911 if (s != bak || *s != '0') 2912 ++s; 2913 *s = tohex((i >> 4) & 0xf); 2914 if (s != bak || *s != '0') 2915 ++s; 2916 *s = tohex(i & 0xf); 2917 return s - bak + 1; 2918 } 2919 2920 static unsigned int fmt_ip6(char *s, const char ip[16]) 2921 { 2922 unsigned int len; 2923 unsigned int i; 2924 unsigned int temp; 2925 unsigned int compressing; 2926 int j; 2927 2928 len = 0; 2929 compressing = 0; 2930 for (j = 0; j < 16; j += 2) { 2931 2932 #ifdef V4MAPPEDPREFIX 2933 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) { 2934 inet_ntoa_r(*(struct in_addr *)(ip + 12), s); 2935 temp = strlen(s); 2936 return len + temp; 2937 } 2938 #endif 2939 temp = ((unsigned long)(unsigned char)ip[j] << 8) + 2940 (unsigned long)(unsigned char)ip[j + 1]; 2941 if (temp == 0) { 2942 if (!compressing) { 2943 compressing = 1; 2944 if (j == 0) { 2945 *s++ = ':'; 2946 ++len; 2947 } 2948 } 2949 } else { 2950 if (compressing) { 2951 compressing = 0; 2952 *s++ = ':'; 2953 ++len; 2954 } 2955 i = fmt_xlong(s, temp); 2956 len += i; 2957 s += i; 2958 if (j < 14) { 2959 *s++ = ':'; 2960 ++len; 2961 } 2962 } 2963 } 2964 if (compressing) { 2965 *s++ = ':'; 2966 ++len; 2967 } 2968 *s = 0; 2969 return len; 2970 } 2971 2972 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2973 struct pktgen_dev *pkt_dev) 2974 { 2975 struct sk_buff *skb = NULL; 2976 __u8 *eth; 2977 struct udphdr *udph; 2978 int datalen; 2979 struct ipv6hdr *iph; 2980 struct pktgen_hdr *pgh = NULL; 2981 __be16 protocol = htons(ETH_P_IPV6); 2982 __be32 *mpls; 2983 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2984 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2985 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2986 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2987 u16 queue_map; 2988 2989 if (pkt_dev->nr_labels) 2990 protocol = htons(ETH_P_MPLS_UC); 2991 2992 if (pkt_dev->vlan_id != 0xffff) 2993 protocol = htons(ETH_P_8021Q); 2994 2995 /* Update any of the values, used when we're incrementing various 2996 * fields. 2997 */ 2998 mod_cur_headers(pkt_dev); 2999 queue_map = pkt_dev->cur_queue_map; 3000 3001 skb = __netdev_alloc_skb(odev, 3002 pkt_dev->cur_pkt_size + 64 3003 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT); 3004 if (!skb) { 3005 sprintf(pkt_dev->result, "No memory"); 3006 return NULL; 3007 } 3008 3009 skb_reserve(skb, 16); 3010 3011 /* Reserve for ethernet and IP header */ 3012 eth = (__u8 *) skb_push(skb, 14); 3013 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 3014 if (pkt_dev->nr_labels) 3015 mpls_push(mpls, pkt_dev); 3016 3017 if (pkt_dev->vlan_id != 0xffff) { 3018 if (pkt_dev->svlan_id != 0xffff) { 3019 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 3020 *svlan_tci = build_tci(pkt_dev->svlan_id, 3021 pkt_dev->svlan_cfi, 3022 pkt_dev->svlan_p); 3023 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 3024 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 3025 } 3026 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 3027 *vlan_tci = build_tci(pkt_dev->vlan_id, 3028 pkt_dev->vlan_cfi, 3029 pkt_dev->vlan_p); 3030 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 3031 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 3032 } 3033 3034 skb->network_header = skb->tail; 3035 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr); 3036 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr)); 3037 skb_set_queue_mapping(skb, queue_map); 3038 skb->priority = pkt_dev->skb_priority; 3039 iph = ipv6_hdr(skb); 3040 udph = udp_hdr(skb); 3041 3042 memcpy(eth, pkt_dev->hh, 12); 3043 *(__be16 *) ð[12] = protocol; 3044 3045 /* Eth + IPh + UDPh + mpls */ 3046 datalen = pkt_dev->cur_pkt_size - 14 - 3047 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 3048 pkt_dev->pkt_overhead; 3049 3050 if (datalen < sizeof(struct pktgen_hdr)) { 3051 datalen = sizeof(struct pktgen_hdr); 3052 if (net_ratelimit()) 3053 pr_info("increased datalen to %d\n", datalen); 3054 } 3055 3056 udph->source = htons(pkt_dev->cur_udp_src); 3057 udph->dest = htons(pkt_dev->cur_udp_dst); 3058 udph->len = htons(datalen + sizeof(struct udphdr)); 3059 udph->check = 0; /* No checksum */ 3060 3061 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 3062 3063 if (pkt_dev->traffic_class) { 3064 /* Version + traffic class + flow (0) */ 3065 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 3066 } 3067 3068 iph->hop_limit = 32; 3069 3070 iph->payload_len = htons(sizeof(struct udphdr) + datalen); 3071 iph->nexthdr = IPPROTO_UDP; 3072 3073 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr); 3074 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr); 3075 3076 skb->mac_header = (skb->network_header - ETH_HLEN - 3077 pkt_dev->pkt_overhead); 3078 skb->protocol = protocol; 3079 skb->dev = odev; 3080 skb->pkt_type = PACKET_HOST; 3081 3082 if (pkt_dev->nfrags <= 0) 3083 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 3084 else { 3085 int frags = pkt_dev->nfrags; 3086 int i; 3087 3088 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 3089 3090 if (frags > MAX_SKB_FRAGS) 3091 frags = MAX_SKB_FRAGS; 3092 if (datalen > frags * PAGE_SIZE) { 3093 skb_put(skb, datalen - frags * PAGE_SIZE); 3094 datalen = frags * PAGE_SIZE; 3095 } 3096 3097 i = 0; 3098 while (datalen > 0) { 3099 struct page *page = alloc_pages(GFP_KERNEL, 0); 3100 skb_shinfo(skb)->frags[i].page = page; 3101 skb_shinfo(skb)->frags[i].page_offset = 0; 3102 skb_shinfo(skb)->frags[i].size = 3103 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 3104 datalen -= skb_shinfo(skb)->frags[i].size; 3105 skb->len += skb_shinfo(skb)->frags[i].size; 3106 skb->data_len += skb_shinfo(skb)->frags[i].size; 3107 i++; 3108 skb_shinfo(skb)->nr_frags = i; 3109 } 3110 3111 while (i < frags) { 3112 int rem; 3113 3114 if (i == 0) 3115 break; 3116 3117 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 3118 if (rem == 0) 3119 break; 3120 3121 skb_shinfo(skb)->frags[i - 1].size -= rem; 3122 3123 skb_shinfo(skb)->frags[i] = 3124 skb_shinfo(skb)->frags[i - 1]; 3125 get_page(skb_shinfo(skb)->frags[i].page); 3126 skb_shinfo(skb)->frags[i].page = 3127 skb_shinfo(skb)->frags[i - 1].page; 3128 skb_shinfo(skb)->frags[i].page_offset += 3129 skb_shinfo(skb)->frags[i - 1].size; 3130 skb_shinfo(skb)->frags[i].size = rem; 3131 i++; 3132 skb_shinfo(skb)->nr_frags = i; 3133 } 3134 } 3135 3136 /* Stamp the time, and sequence number, 3137 * convert them to network byte order 3138 * should we update cloned packets too ? 3139 */ 3140 if (pgh) { 3141 struct timeval timestamp; 3142 3143 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 3144 pgh->seq_num = htonl(pkt_dev->seq_num); 3145 3146 do_gettimeofday(×tamp); 3147 pgh->tv_sec = htonl(timestamp.tv_sec); 3148 pgh->tv_usec = htonl(timestamp.tv_usec); 3149 } 3150 /* pkt_dev->seq_num++; FF: you really mean this? */ 3151 3152 return skb; 3153 } 3154 3155 static struct sk_buff *fill_packet(struct net_device *odev, 3156 struct pktgen_dev *pkt_dev) 3157 { 3158 if (pkt_dev->flags & F_IPV6) 3159 return fill_packet_ipv6(odev, pkt_dev); 3160 else 3161 return fill_packet_ipv4(odev, pkt_dev); 3162 } 3163 3164 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 3165 { 3166 pkt_dev->seq_num = 1; 3167 pkt_dev->idle_acc = 0; 3168 pkt_dev->sofar = 0; 3169 pkt_dev->tx_bytes = 0; 3170 pkt_dev->errors = 0; 3171 } 3172 3173 /* Set up structure for sending pkts, clear counters */ 3174 3175 static void pktgen_run(struct pktgen_thread *t) 3176 { 3177 struct pktgen_dev *pkt_dev; 3178 int started = 0; 3179 3180 func_enter(); 3181 3182 if_lock(t); 3183 list_for_each_entry(pkt_dev, &t->if_list, list) { 3184 3185 /* 3186 * setup odev and create initial packet. 3187 */ 3188 pktgen_setup_inject(pkt_dev); 3189 3190 if (pkt_dev->odev) { 3191 pktgen_clear_counters(pkt_dev); 3192 pkt_dev->running = 1; /* Cranke yeself! */ 3193 pkt_dev->skb = NULL; 3194 pkt_dev->started_at = 3195 pkt_dev->next_tx = ktime_now(); 3196 3197 set_pkt_overhead(pkt_dev); 3198 3199 strcpy(pkt_dev->result, "Starting"); 3200 started++; 3201 } else 3202 strcpy(pkt_dev->result, "Error starting"); 3203 } 3204 if_unlock(t); 3205 if (started) 3206 t->control &= ~(T_STOP); 3207 } 3208 3209 static void pktgen_stop_all_threads_ifs(void) 3210 { 3211 struct pktgen_thread *t; 3212 3213 func_enter(); 3214 3215 mutex_lock(&pktgen_thread_lock); 3216 3217 list_for_each_entry(t, &pktgen_threads, th_list) 3218 t->control |= T_STOP; 3219 3220 mutex_unlock(&pktgen_thread_lock); 3221 } 3222 3223 static int thread_is_running(const struct pktgen_thread *t) 3224 { 3225 const struct pktgen_dev *pkt_dev; 3226 3227 list_for_each_entry(pkt_dev, &t->if_list, list) 3228 if (pkt_dev->running) 3229 return 1; 3230 return 0; 3231 } 3232 3233 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3234 { 3235 if_lock(t); 3236 3237 while (thread_is_running(t)) { 3238 3239 if_unlock(t); 3240 3241 msleep_interruptible(100); 3242 3243 if (signal_pending(current)) 3244 goto signal; 3245 if_lock(t); 3246 } 3247 if_unlock(t); 3248 return 1; 3249 signal: 3250 return 0; 3251 } 3252 3253 static int pktgen_wait_all_threads_run(void) 3254 { 3255 struct pktgen_thread *t; 3256 int sig = 1; 3257 3258 mutex_lock(&pktgen_thread_lock); 3259 3260 list_for_each_entry(t, &pktgen_threads, th_list) { 3261 sig = pktgen_wait_thread_run(t); 3262 if (sig == 0) 3263 break; 3264 } 3265 3266 if (sig == 0) 3267 list_for_each_entry(t, &pktgen_threads, th_list) 3268 t->control |= (T_STOP); 3269 3270 mutex_unlock(&pktgen_thread_lock); 3271 return sig; 3272 } 3273 3274 static void pktgen_run_all_threads(void) 3275 { 3276 struct pktgen_thread *t; 3277 3278 func_enter(); 3279 3280 mutex_lock(&pktgen_thread_lock); 3281 3282 list_for_each_entry(t, &pktgen_threads, th_list) 3283 t->control |= (T_RUN); 3284 3285 mutex_unlock(&pktgen_thread_lock); 3286 3287 /* Propagate thread->control */ 3288 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3289 3290 pktgen_wait_all_threads_run(); 3291 } 3292 3293 static void pktgen_reset_all_threads(void) 3294 { 3295 struct pktgen_thread *t; 3296 3297 func_enter(); 3298 3299 mutex_lock(&pktgen_thread_lock); 3300 3301 list_for_each_entry(t, &pktgen_threads, th_list) 3302 t->control |= (T_REMDEVALL); 3303 3304 mutex_unlock(&pktgen_thread_lock); 3305 3306 /* Propagate thread->control */ 3307 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3308 3309 pktgen_wait_all_threads_run(); 3310 } 3311 3312 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3313 { 3314 __u64 bps, mbps, pps; 3315 char *p = pkt_dev->result; 3316 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3317 pkt_dev->started_at); 3318 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3319 3320 p += sprintf(p, "OK: %llu(c%llu+d%llu) nsec, %llu (%dbyte,%dfrags)\n", 3321 (unsigned long long)ktime_to_us(elapsed), 3322 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3323 (unsigned long long)ktime_to_us(idle), 3324 (unsigned long long)pkt_dev->sofar, 3325 pkt_dev->cur_pkt_size, nr_frags); 3326 3327 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3328 ktime_to_ns(elapsed)); 3329 3330 bps = pps * 8 * pkt_dev->cur_pkt_size; 3331 3332 mbps = bps; 3333 do_div(mbps, 1000000); 3334 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3335 (unsigned long long)pps, 3336 (unsigned long long)mbps, 3337 (unsigned long long)bps, 3338 (unsigned long long)pkt_dev->errors); 3339 } 3340 3341 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3342 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3343 { 3344 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3345 3346 if (!pkt_dev->running) { 3347 pr_warning("interface: %s is already stopped\n", 3348 pkt_dev->odevname); 3349 return -EINVAL; 3350 } 3351 3352 kfree_skb(pkt_dev->skb); 3353 pkt_dev->skb = NULL; 3354 pkt_dev->stopped_at = ktime_now(); 3355 pkt_dev->running = 0; 3356 3357 show_results(pkt_dev, nr_frags); 3358 3359 return 0; 3360 } 3361 3362 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3363 { 3364 struct pktgen_dev *pkt_dev, *best = NULL; 3365 3366 if_lock(t); 3367 3368 list_for_each_entry(pkt_dev, &t->if_list, list) { 3369 if (!pkt_dev->running) 3370 continue; 3371 if (best == NULL) 3372 best = pkt_dev; 3373 else if (ktime_lt(pkt_dev->next_tx, best->next_tx)) 3374 best = pkt_dev; 3375 } 3376 if_unlock(t); 3377 return best; 3378 } 3379 3380 static void pktgen_stop(struct pktgen_thread *t) 3381 { 3382 struct pktgen_dev *pkt_dev; 3383 3384 func_enter(); 3385 3386 if_lock(t); 3387 3388 list_for_each_entry(pkt_dev, &t->if_list, list) { 3389 pktgen_stop_device(pkt_dev); 3390 } 3391 3392 if_unlock(t); 3393 } 3394 3395 /* 3396 * one of our devices needs to be removed - find it 3397 * and remove it 3398 */ 3399 static void pktgen_rem_one_if(struct pktgen_thread *t) 3400 { 3401 struct list_head *q, *n; 3402 struct pktgen_dev *cur; 3403 3404 func_enter(); 3405 3406 if_lock(t); 3407 3408 list_for_each_safe(q, n, &t->if_list) { 3409 cur = list_entry(q, struct pktgen_dev, list); 3410 3411 if (!cur->removal_mark) 3412 continue; 3413 3414 kfree_skb(cur->skb); 3415 cur->skb = NULL; 3416 3417 pktgen_remove_device(t, cur); 3418 3419 break; 3420 } 3421 3422 if_unlock(t); 3423 } 3424 3425 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3426 { 3427 struct list_head *q, *n; 3428 struct pktgen_dev *cur; 3429 3430 func_enter(); 3431 3432 /* Remove all devices, free mem */ 3433 3434 if_lock(t); 3435 3436 list_for_each_safe(q, n, &t->if_list) { 3437 cur = list_entry(q, struct pktgen_dev, list); 3438 3439 kfree_skb(cur->skb); 3440 cur->skb = NULL; 3441 3442 pktgen_remove_device(t, cur); 3443 } 3444 3445 if_unlock(t); 3446 } 3447 3448 static void pktgen_rem_thread(struct pktgen_thread *t) 3449 { 3450 /* Remove from the thread list */ 3451 3452 remove_proc_entry(t->tsk->comm, pg_proc_dir); 3453 3454 mutex_lock(&pktgen_thread_lock); 3455 3456 list_del(&t->th_list); 3457 3458 mutex_unlock(&pktgen_thread_lock); 3459 } 3460 3461 static void pktgen_resched(struct pktgen_dev *pkt_dev) 3462 { 3463 ktime_t idle_start = ktime_now(); 3464 schedule(); 3465 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3466 } 3467 3468 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) 3469 { 3470 ktime_t idle_start = ktime_now(); 3471 3472 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3473 if (signal_pending(current)) 3474 break; 3475 3476 if (need_resched()) 3477 pktgen_resched(pkt_dev); 3478 else 3479 cpu_relax(); 3480 } 3481 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3482 } 3483 3484 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3485 { 3486 struct net_device *odev = pkt_dev->odev; 3487 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *) 3488 = odev->netdev_ops->ndo_start_xmit; 3489 struct netdev_queue *txq; 3490 u16 queue_map; 3491 int ret; 3492 3493 /* If device is offline, then don't send */ 3494 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { 3495 pktgen_stop_device(pkt_dev); 3496 return; 3497 } 3498 3499 /* This is max DELAY, this has special meaning of 3500 * "never transmit" 3501 */ 3502 if (unlikely(pkt_dev->delay == ULLONG_MAX)) { 3503 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX); 3504 return; 3505 } 3506 3507 /* If no skb or clone count exhausted then get new one */ 3508 if (!pkt_dev->skb || (pkt_dev->last_ok && 3509 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { 3510 /* build a new pkt */ 3511 kfree_skb(pkt_dev->skb); 3512 3513 pkt_dev->skb = fill_packet(odev, pkt_dev); 3514 if (pkt_dev->skb == NULL) { 3515 pr_err("ERROR: couldn't allocate skb in fill_packet\n"); 3516 schedule(); 3517 pkt_dev->clone_count--; /* back out increment, OOM */ 3518 return; 3519 } 3520 pkt_dev->last_pkt_size = pkt_dev->skb->len; 3521 pkt_dev->allocated_skbs++; 3522 pkt_dev->clone_count = 0; /* reset counter */ 3523 } 3524 3525 if (pkt_dev->delay && pkt_dev->last_ok) 3526 spin(pkt_dev, pkt_dev->next_tx); 3527 3528 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3529 txq = netdev_get_tx_queue(odev, queue_map); 3530 3531 __netif_tx_lock_bh(txq); 3532 3533 if (unlikely(netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq))) { 3534 ret = NETDEV_TX_BUSY; 3535 pkt_dev->last_ok = 0; 3536 goto unlock; 3537 } 3538 atomic_inc(&(pkt_dev->skb->users)); 3539 ret = (*xmit)(pkt_dev->skb, odev); 3540 3541 switch (ret) { 3542 case NETDEV_TX_OK: 3543 txq_trans_update(txq); 3544 pkt_dev->last_ok = 1; 3545 pkt_dev->sofar++; 3546 pkt_dev->seq_num++; 3547 pkt_dev->tx_bytes += pkt_dev->last_pkt_size; 3548 break; 3549 case NET_XMIT_DROP: 3550 case NET_XMIT_CN: 3551 case NET_XMIT_POLICED: 3552 /* skb has been consumed */ 3553 pkt_dev->errors++; 3554 break; 3555 default: /* Drivers are not supposed to return other values! */ 3556 if (net_ratelimit()) 3557 pr_info("pktgen: %s xmit error: %d\n", 3558 pkt_dev->odevname, ret); 3559 pkt_dev->errors++; 3560 /* fallthru */ 3561 case NETDEV_TX_LOCKED: 3562 case NETDEV_TX_BUSY: 3563 /* Retry it next time */ 3564 atomic_dec(&(pkt_dev->skb->users)); 3565 pkt_dev->last_ok = 0; 3566 } 3567 unlock: 3568 __netif_tx_unlock_bh(txq); 3569 3570 /* If pkt_dev->count is zero, then run forever */ 3571 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3572 pktgen_wait_for_skb(pkt_dev); 3573 3574 /* Done with this */ 3575 pktgen_stop_device(pkt_dev); 3576 } 3577 } 3578 3579 /* 3580 * Main loop of the thread goes here 3581 */ 3582 3583 static int pktgen_thread_worker(void *arg) 3584 { 3585 DEFINE_WAIT(wait); 3586 struct pktgen_thread *t = arg; 3587 struct pktgen_dev *pkt_dev = NULL; 3588 int cpu = t->cpu; 3589 3590 BUG_ON(smp_processor_id() != cpu); 3591 3592 init_waitqueue_head(&t->queue); 3593 complete(&t->start_done); 3594 3595 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); 3596 3597 set_current_state(TASK_INTERRUPTIBLE); 3598 3599 set_freezable(); 3600 3601 while (!kthread_should_stop()) { 3602 pkt_dev = next_to_run(t); 3603 3604 if (unlikely(!pkt_dev && t->control == 0)) { 3605 wait_event_interruptible_timeout(t->queue, 3606 t->control != 0, 3607 HZ/10); 3608 try_to_freeze(); 3609 continue; 3610 } 3611 3612 __set_current_state(TASK_RUNNING); 3613 3614 if (likely(pkt_dev)) { 3615 pktgen_xmit(pkt_dev); 3616 3617 if (need_resched()) 3618 pktgen_resched(pkt_dev); 3619 else 3620 cpu_relax(); 3621 } 3622 3623 if (t->control & T_STOP) { 3624 pktgen_stop(t); 3625 t->control &= ~(T_STOP); 3626 } 3627 3628 if (t->control & T_RUN) { 3629 pktgen_run(t); 3630 t->control &= ~(T_RUN); 3631 } 3632 3633 if (t->control & T_REMDEVALL) { 3634 pktgen_rem_all_ifs(t); 3635 t->control &= ~(T_REMDEVALL); 3636 } 3637 3638 if (t->control & T_REMDEV) { 3639 pktgen_rem_one_if(t); 3640 t->control &= ~(T_REMDEV); 3641 } 3642 3643 try_to_freeze(); 3644 3645 set_current_state(TASK_INTERRUPTIBLE); 3646 } 3647 3648 pr_debug("%s stopping all device\n", t->tsk->comm); 3649 pktgen_stop(t); 3650 3651 pr_debug("%s removing all device\n", t->tsk->comm); 3652 pktgen_rem_all_ifs(t); 3653 3654 pr_debug("%s removing thread\n", t->tsk->comm); 3655 pktgen_rem_thread(t); 3656 3657 return 0; 3658 } 3659 3660 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3661 const char *ifname, bool exact) 3662 { 3663 struct pktgen_dev *p, *pkt_dev = NULL; 3664 size_t len = strlen(ifname); 3665 3666 if_lock(t); 3667 list_for_each_entry(p, &t->if_list, list) 3668 if (strncmp(p->odevname, ifname, len) == 0) { 3669 if (p->odevname[len]) { 3670 if (exact || p->odevname[len] != '@') 3671 continue; 3672 } 3673 pkt_dev = p; 3674 break; 3675 } 3676 3677 if_unlock(t); 3678 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev); 3679 return pkt_dev; 3680 } 3681 3682 /* 3683 * Adds a dev at front of if_list. 3684 */ 3685 3686 static int add_dev_to_thread(struct pktgen_thread *t, 3687 struct pktgen_dev *pkt_dev) 3688 { 3689 int rv = 0; 3690 3691 if_lock(t); 3692 3693 if (pkt_dev->pg_thread) { 3694 pr_err("ERROR: already assigned to a thread\n"); 3695 rv = -EBUSY; 3696 goto out; 3697 } 3698 3699 list_add(&pkt_dev->list, &t->if_list); 3700 pkt_dev->pg_thread = t; 3701 pkt_dev->running = 0; 3702 3703 out: 3704 if_unlock(t); 3705 return rv; 3706 } 3707 3708 /* Called under thread lock */ 3709 3710 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3711 { 3712 struct pktgen_dev *pkt_dev; 3713 int err; 3714 int node = cpu_to_node(t->cpu); 3715 3716 /* We don't allow a device to be on several threads */ 3717 3718 pkt_dev = __pktgen_NN_threads(ifname, FIND); 3719 if (pkt_dev) { 3720 pr_err("ERROR: interface already used\n"); 3721 return -EBUSY; 3722 } 3723 3724 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); 3725 if (!pkt_dev) 3726 return -ENOMEM; 3727 3728 strcpy(pkt_dev->odevname, ifname); 3729 pkt_dev->flows = vmalloc_node(MAX_CFLOWS * sizeof(struct flow_state), 3730 node); 3731 if (pkt_dev->flows == NULL) { 3732 kfree(pkt_dev); 3733 return -ENOMEM; 3734 } 3735 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state)); 3736 3737 pkt_dev->removal_mark = 0; 3738 pkt_dev->min_pkt_size = ETH_ZLEN; 3739 pkt_dev->max_pkt_size = ETH_ZLEN; 3740 pkt_dev->nfrags = 0; 3741 pkt_dev->clone_skb = pg_clone_skb_d; 3742 pkt_dev->delay = pg_delay_d; 3743 pkt_dev->count = pg_count_d; 3744 pkt_dev->sofar = 0; 3745 pkt_dev->udp_src_min = 9; /* sink port */ 3746 pkt_dev->udp_src_max = 9; 3747 pkt_dev->udp_dst_min = 9; 3748 pkt_dev->udp_dst_max = 9; 3749 3750 pkt_dev->vlan_p = 0; 3751 pkt_dev->vlan_cfi = 0; 3752 pkt_dev->vlan_id = 0xffff; 3753 pkt_dev->svlan_p = 0; 3754 pkt_dev->svlan_cfi = 0; 3755 pkt_dev->svlan_id = 0xffff; 3756 pkt_dev->node = -1; 3757 3758 err = pktgen_setup_dev(pkt_dev, ifname); 3759 if (err) 3760 goto out1; 3761 3762 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir, 3763 &pktgen_if_fops, pkt_dev); 3764 if (!pkt_dev->entry) { 3765 pr_err("cannot create %s/%s procfs entry\n", 3766 PG_PROC_DIR, ifname); 3767 err = -EINVAL; 3768 goto out2; 3769 } 3770 #ifdef CONFIG_XFRM 3771 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3772 pkt_dev->ipsproto = IPPROTO_ESP; 3773 #endif 3774 3775 return add_dev_to_thread(t, pkt_dev); 3776 out2: 3777 dev_put(pkt_dev->odev); 3778 out1: 3779 #ifdef CONFIG_XFRM 3780 free_SAs(pkt_dev); 3781 #endif 3782 vfree(pkt_dev->flows); 3783 kfree(pkt_dev); 3784 return err; 3785 } 3786 3787 static int __init pktgen_create_thread(int cpu) 3788 { 3789 struct pktgen_thread *t; 3790 struct proc_dir_entry *pe; 3791 struct task_struct *p; 3792 3793 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL, 3794 cpu_to_node(cpu)); 3795 if (!t) { 3796 pr_err("ERROR: out of memory, can't create new thread\n"); 3797 return -ENOMEM; 3798 } 3799 3800 spin_lock_init(&t->if_lock); 3801 t->cpu = cpu; 3802 3803 INIT_LIST_HEAD(&t->if_list); 3804 3805 list_add_tail(&t->th_list, &pktgen_threads); 3806 init_completion(&t->start_done); 3807 3808 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu); 3809 if (IS_ERR(p)) { 3810 pr_err("kernel_thread() failed for cpu %d\n", t->cpu); 3811 list_del(&t->th_list); 3812 kfree(t); 3813 return PTR_ERR(p); 3814 } 3815 kthread_bind(p, cpu); 3816 t->tsk = p; 3817 3818 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir, 3819 &pktgen_thread_fops, t); 3820 if (!pe) { 3821 pr_err("cannot create %s/%s procfs entry\n", 3822 PG_PROC_DIR, t->tsk->comm); 3823 kthread_stop(p); 3824 list_del(&t->th_list); 3825 kfree(t); 3826 return -EINVAL; 3827 } 3828 3829 wake_up_process(p); 3830 wait_for_completion(&t->start_done); 3831 3832 return 0; 3833 } 3834 3835 /* 3836 * Removes a device from the thread if_list. 3837 */ 3838 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3839 struct pktgen_dev *pkt_dev) 3840 { 3841 struct list_head *q, *n; 3842 struct pktgen_dev *p; 3843 3844 list_for_each_safe(q, n, &t->if_list) { 3845 p = list_entry(q, struct pktgen_dev, list); 3846 if (p == pkt_dev) 3847 list_del(&p->list); 3848 } 3849 } 3850 3851 static int pktgen_remove_device(struct pktgen_thread *t, 3852 struct pktgen_dev *pkt_dev) 3853 { 3854 3855 pr_debug("remove_device pkt_dev=%p\n", pkt_dev); 3856 3857 if (pkt_dev->running) { 3858 pr_warning("WARNING: trying to remove a running interface, stopping it now\n"); 3859 pktgen_stop_device(pkt_dev); 3860 } 3861 3862 /* Dis-associate from the interface */ 3863 3864 if (pkt_dev->odev) { 3865 dev_put(pkt_dev->odev); 3866 pkt_dev->odev = NULL; 3867 } 3868 3869 /* And update the thread if_list */ 3870 3871 _rem_dev_from_if_list(t, pkt_dev); 3872 3873 if (pkt_dev->entry) 3874 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 3875 3876 #ifdef CONFIG_XFRM 3877 free_SAs(pkt_dev); 3878 #endif 3879 vfree(pkt_dev->flows); 3880 kfree(pkt_dev); 3881 return 0; 3882 } 3883 3884 static int __init pg_init(void) 3885 { 3886 int cpu; 3887 struct proc_dir_entry *pe; 3888 3889 pr_info("%s", version); 3890 3891 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net); 3892 if (!pg_proc_dir) 3893 return -ENODEV; 3894 3895 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops); 3896 if (pe == NULL) { 3897 pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL); 3898 proc_net_remove(&init_net, PG_PROC_DIR); 3899 return -EINVAL; 3900 } 3901 3902 /* Register us to receive netdevice events */ 3903 register_netdevice_notifier(&pktgen_notifier_block); 3904 3905 for_each_online_cpu(cpu) { 3906 int err; 3907 3908 err = pktgen_create_thread(cpu); 3909 if (err) 3910 pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n", 3911 cpu, err); 3912 } 3913 3914 if (list_empty(&pktgen_threads)) { 3915 pr_err("ERROR: Initialization failed for all threads\n"); 3916 unregister_netdevice_notifier(&pktgen_notifier_block); 3917 remove_proc_entry(PGCTRL, pg_proc_dir); 3918 proc_net_remove(&init_net, PG_PROC_DIR); 3919 return -ENODEV; 3920 } 3921 3922 return 0; 3923 } 3924 3925 static void __exit pg_cleanup(void) 3926 { 3927 struct pktgen_thread *t; 3928 struct list_head *q, *n; 3929 3930 /* Stop all interfaces & threads */ 3931 3932 list_for_each_safe(q, n, &pktgen_threads) { 3933 t = list_entry(q, struct pktgen_thread, th_list); 3934 kthread_stop(t->tsk); 3935 kfree(t); 3936 } 3937 3938 /* Un-register us from receiving netdevice events */ 3939 unregister_netdevice_notifier(&pktgen_notifier_block); 3940 3941 /* Clean up proc file system */ 3942 remove_proc_entry(PGCTRL, pg_proc_dir); 3943 proc_net_remove(&init_net, PG_PROC_DIR); 3944 } 3945 3946 module_init(pg_init); 3947 module_exit(pg_cleanup); 3948 3949 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); 3950 MODULE_DESCRIPTION("Packet Generator tool"); 3951 MODULE_LICENSE("GPL"); 3952 MODULE_VERSION(VERSION); 3953 module_param(pg_count_d, int, 0); 3954 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); 3955 module_param(pg_delay_d, int, 0); 3956 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); 3957 module_param(pg_clone_skb_d, int, 0); 3958 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); 3959 module_param(debug, int, 0); 3960 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); 3961