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 L��s <jens.laas@data.slu.se> 10 * 11 * This program is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License 13 * as published by the Free Software Foundation; either version 14 * 2 of the License, or (at your option) any later version. 15 * 16 * 17 * A tool for loading the network with preconfigurated packets. 18 * The tool is implemented as a linux module. Parameters are output 19 * device, delay (to hard_xmit), number of packets, and whether 20 * to use multiple SKBs or just the same one. 21 * pktgen uses the installed interface's output routine. 22 * 23 * Additional hacking by: 24 * 25 * Jens.Laas@data.slu.se 26 * Improved by ANK. 010120. 27 * Improved by ANK even more. 010212. 28 * MAC address typo fixed. 010417 --ro 29 * Integrated. 020301 --DaveM 30 * Added multiskb option 020301 --DaveM 31 * Scaling of results. 020417--sigurdur@linpro.no 32 * Significant re-work of the module: 33 * * Convert to threaded model to more efficiently be able to transmit 34 * and receive on multiple interfaces at once. 35 * * Converted many counters to __u64 to allow longer runs. 36 * * Allow configuration of ranges, like min/max IP address, MACs, 37 * and UDP-ports, for both source and destination, and can 38 * set to use a random distribution or sequentially walk the range. 39 * * Can now change most values after starting. 40 * * Place 12-byte packet in UDP payload with magic number, 41 * sequence number, and timestamp. 42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and 43 * latencies (with micro-second) precision. 44 * * Add IOCTL interface to easily get counters & configuration. 45 * --Ben Greear <greearb@candelatech.com> 46 * 47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct 48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0 49 * as a "fastpath" with a configurable number of clones after alloc's. 50 * clone_skb=0 means all packets are allocated this also means ranges time 51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100 52 * clones. 53 * 54 * Also moved to /proc/net/pktgen/ 55 * --ro 56 * 57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever 58 * mistakes. Also merged in DaveM's patch in the -pre6 patch. 59 * --Ben Greear <greearb@candelatech.com> 60 * 61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br) 62 * 63 * 64 * 021124 Finished major redesign and rewrite for new functionality. 65 * See Documentation/networking/pktgen.txt for how to use this. 66 * 67 * The new operation: 68 * For each CPU one thread/process is created at start. This process checks 69 * for running devices in the if_list and sends packets until count is 0 it 70 * also the thread checks the thread->control which is used for inter-process 71 * communication. controlling process "posts" operations to the threads this 72 * way. The if_lock should be possible to remove when add/rem_device is merged 73 * into this too. 74 * 75 * By design there should only be *one* "controlling" process. In practice 76 * multiple write accesses gives unpredictable result. Understood by "write" 77 * to /proc gives result code thats should be read be the "writer". 78 * For practical use this should be no problem. 79 * 80 * Note when adding devices to a specific CPU there good idea to also assign 81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU. 82 * --ro 83 * 84 * Fix refcount off by one if first packet fails, potential null deref, 85 * memleak 030710- KJP 86 * 87 * First "ranges" functionality for ipv6 030726 --ro 88 * 89 * Included flow support. 030802 ANK. 90 * 91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org> 92 * 93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419 94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604 95 * 96 * New xmit() return, do_div and misc clean up by Stephen Hemminger 97 * <shemminger@osdl.org> 040923 98 * 99 * Randy Dunlap fixed u64 printk compiler waring 100 * 101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org> 102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213 103 * 104 * Corrections from Nikolai Malykh (nmalykh@bilim.com) 105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230 106 * 107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com> 108 * 050103 109 * 110 * MPLS support by Steven Whitehouse <steve@chygwyn.com> 111 * 112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com> 113 * 114 * Fixed src_mac command to set source mac of packet to value specified in 115 * command by Adit Ranadive <adit.262@gmail.com> 116 * 117 */ 118 #include <linux/sys.h> 119 #include <linux/types.h> 120 #include <linux/module.h> 121 #include <linux/moduleparam.h> 122 #include <linux/kernel.h> 123 #include <linux/mutex.h> 124 #include <linux/sched.h> 125 #include <linux/slab.h> 126 #include <linux/vmalloc.h> 127 #include <linux/unistd.h> 128 #include <linux/string.h> 129 #include <linux/ptrace.h> 130 #include <linux/errno.h> 131 #include <linux/ioport.h> 132 #include <linux/interrupt.h> 133 #include <linux/capability.h> 134 #include <linux/freezer.h> 135 #include <linux/delay.h> 136 #include <linux/timer.h> 137 #include <linux/list.h> 138 #include <linux/init.h> 139 #include <linux/skbuff.h> 140 #include <linux/netdevice.h> 141 #include <linux/inet.h> 142 #include <linux/inetdevice.h> 143 #include <linux/rtnetlink.h> 144 #include <linux/if_arp.h> 145 #include <linux/if_vlan.h> 146 #include <linux/in.h> 147 #include <linux/ip.h> 148 #include <linux/ipv6.h> 149 #include <linux/udp.h> 150 #include <linux/proc_fs.h> 151 #include <linux/seq_file.h> 152 #include <linux/wait.h> 153 #include <linux/etherdevice.h> 154 #include <linux/kthread.h> 155 #include <net/net_namespace.h> 156 #include <net/checksum.h> 157 #include <net/ipv6.h> 158 #include <net/addrconf.h> 159 #ifdef CONFIG_XFRM 160 #include <net/xfrm.h> 161 #endif 162 #include <asm/byteorder.h> 163 #include <linux/rcupdate.h> 164 #include <asm/bitops.h> 165 #include <asm/io.h> 166 #include <asm/dma.h> 167 #include <asm/uaccess.h> 168 #include <asm/div64.h> /* do_div */ 169 #include <asm/timex.h> 170 171 #define VERSION "pktgen v2.69: Packet Generator for packet performance testing.\n" 172 173 /* The buckets are exponential in 'width' */ 174 #define LAT_BUCKETS_MAX 32 175 #define IP_NAME_SZ 32 176 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */ 177 #define MPLS_STACK_BOTTOM htonl(0x00000100) 178 179 /* Device flag bits */ 180 #define F_IPSRC_RND (1<<0) /* IP-Src Random */ 181 #define F_IPDST_RND (1<<1) /* IP-Dst Random */ 182 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */ 183 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */ 184 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */ 185 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */ 186 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */ 187 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */ 188 #define F_MPLS_RND (1<<8) /* Random MPLS labels */ 189 #define F_VID_RND (1<<9) /* Random VLAN ID */ 190 #define F_SVID_RND (1<<10) /* Random SVLAN ID */ 191 #define F_FLOW_SEQ (1<<11) /* Sequential flows */ 192 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */ 193 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */ 194 195 /* Thread control flag bits */ 196 #define T_TERMINATE (1<<0) 197 #define T_STOP (1<<1) /* Stop run */ 198 #define T_RUN (1<<2) /* Start run */ 199 #define T_REMDEVALL (1<<3) /* Remove all devs */ 200 #define T_REMDEV (1<<4) /* Remove one dev */ 201 202 /* If lock -- can be removed after some work */ 203 #define if_lock(t) spin_lock(&(t->if_lock)); 204 #define if_unlock(t) spin_unlock(&(t->if_lock)); 205 206 /* Used to help with determining the pkts on receive */ 207 #define PKTGEN_MAGIC 0xbe9be955 208 #define PG_PROC_DIR "pktgen" 209 #define PGCTRL "pgctrl" 210 static struct proc_dir_entry *pg_proc_dir = NULL; 211 212 #define MAX_CFLOWS 65536 213 214 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4) 215 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4) 216 217 struct flow_state { 218 __be32 cur_daddr; 219 int count; 220 #ifdef CONFIG_XFRM 221 struct xfrm_state *x; 222 #endif 223 __u32 flags; 224 }; 225 226 /* flow flag bits */ 227 #define F_INIT (1<<0) /* flow has been initialized */ 228 229 struct pktgen_dev { 230 /* 231 * Try to keep frequent/infrequent used vars. separated. 232 */ 233 struct proc_dir_entry *entry; /* proc file */ 234 struct pktgen_thread *pg_thread;/* the owner */ 235 struct list_head list; /* Used for chaining in the thread's run-queue */ 236 237 int running; /* if this changes to false, the test will stop */ 238 239 /* If min != max, then we will either do a linear iteration, or 240 * we will do a random selection from within the range. 241 */ 242 __u32 flags; 243 int removal_mark; /* non-zero => the device is marked for 244 * removal by worker thread */ 245 246 int min_pkt_size; /* = ETH_ZLEN; */ 247 int max_pkt_size; /* = ETH_ZLEN; */ 248 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */ 249 int nfrags; 250 __u32 delay_us; /* Default delay */ 251 __u32 delay_ns; 252 __u64 count; /* Default No packets to send */ 253 __u64 sofar; /* How many pkts we've sent so far */ 254 __u64 tx_bytes; /* How many bytes we've transmitted */ 255 __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */ 256 257 /* runtime counters relating to clone_skb */ 258 __u64 next_tx_us; /* timestamp of when to tx next */ 259 __u32 next_tx_ns; 260 261 __u64 allocated_skbs; 262 __u32 clone_count; 263 int last_ok; /* Was last skb sent? 264 * Or a failed transmit of some sort? This will keep 265 * sequence numbers in order, for example. 266 */ 267 __u64 started_at; /* micro-seconds */ 268 __u64 stopped_at; /* micro-seconds */ 269 __u64 idle_acc; /* micro-seconds */ 270 __u32 seq_num; 271 272 int clone_skb; /* Use multiple SKBs during packet gen. If this number 273 * is greater than 1, then that many copies of the same 274 * packet will be sent before a new packet is allocated. 275 * For instance, if you want to send 1024 identical packets 276 * before creating a new packet, set clone_skb to 1024. 277 */ 278 279 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 280 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 281 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 282 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 283 284 struct in6_addr in6_saddr; 285 struct in6_addr in6_daddr; 286 struct in6_addr cur_in6_daddr; 287 struct in6_addr cur_in6_saddr; 288 /* For ranges */ 289 struct in6_addr min_in6_daddr; 290 struct in6_addr max_in6_daddr; 291 struct in6_addr min_in6_saddr; 292 struct in6_addr max_in6_saddr; 293 294 /* If we're doing ranges, random or incremental, then this 295 * defines the min/max for those ranges. 296 */ 297 __be32 saddr_min; /* inclusive, source IP address */ 298 __be32 saddr_max; /* exclusive, source IP address */ 299 __be32 daddr_min; /* inclusive, dest IP address */ 300 __be32 daddr_max; /* exclusive, dest IP address */ 301 302 __u16 udp_src_min; /* inclusive, source UDP port */ 303 __u16 udp_src_max; /* exclusive, source UDP port */ 304 __u16 udp_dst_min; /* inclusive, dest UDP port */ 305 __u16 udp_dst_max; /* exclusive, dest UDP port */ 306 307 /* DSCP + ECN */ 308 __u8 tos; /* six most significant bits of (former) IPv4 TOS are for dscp codepoint */ 309 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 (see RFC 3260, sec. 4) */ 310 311 /* MPLS */ 312 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */ 313 __be32 labels[MAX_MPLS_LABELS]; 314 315 /* VLAN/SVLAN (802.1Q/Q-in-Q) */ 316 __u8 vlan_p; 317 __u8 vlan_cfi; 318 __u16 vlan_id; /* 0xffff means no vlan tag */ 319 320 __u8 svlan_p; 321 __u8 svlan_cfi; 322 __u16 svlan_id; /* 0xffff means no svlan tag */ 323 324 __u32 src_mac_count; /* How many MACs to iterate through */ 325 __u32 dst_mac_count; /* How many MACs to iterate through */ 326 327 unsigned char dst_mac[ETH_ALEN]; 328 unsigned char src_mac[ETH_ALEN]; 329 330 __u32 cur_dst_mac_offset; 331 __u32 cur_src_mac_offset; 332 __be32 cur_saddr; 333 __be32 cur_daddr; 334 __u16 cur_udp_dst; 335 __u16 cur_udp_src; 336 __u16 cur_queue_map; 337 __u32 cur_pkt_size; 338 339 __u8 hh[14]; 340 /* = { 341 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, 342 343 We fill in SRC address later 344 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 345 0x08, 0x00 346 }; 347 */ 348 __u16 pad; /* pad out the hh struct to an even 16 bytes */ 349 350 struct sk_buff *skb; /* skb we are to transmit next, mainly used for when we 351 * are transmitting the same one multiple times 352 */ 353 struct net_device *odev; /* The out-going device. Note that the device should 354 * have it's pg_info pointer pointing back to this 355 * device. This will be set when the user specifies 356 * the out-going device name (not when the inject is 357 * started as it used to do.) 358 */ 359 struct flow_state *flows; 360 unsigned cflows; /* Concurrent flows (config) */ 361 unsigned lflow; /* Flow length (config) */ 362 unsigned nflows; /* accumulated flows (stats) */ 363 unsigned curfl; /* current sequenced flow (state)*/ 364 365 u16 queue_map_min; 366 u16 queue_map_max; 367 368 #ifdef CONFIG_XFRM 369 __u8 ipsmode; /* IPSEC mode (config) */ 370 __u8 ipsproto; /* IPSEC type (config) */ 371 #endif 372 char result[512]; 373 }; 374 375 struct pktgen_hdr { 376 __be32 pgh_magic; 377 __be32 seq_num; 378 __be32 tv_sec; 379 __be32 tv_usec; 380 }; 381 382 struct pktgen_thread { 383 spinlock_t if_lock; 384 struct list_head if_list; /* All device here */ 385 struct list_head th_list; 386 struct task_struct *tsk; 387 char result[512]; 388 389 /* Field for thread to receive "posted" events terminate, stop ifs etc. */ 390 391 u32 control; 392 int cpu; 393 394 wait_queue_head_t queue; 395 }; 396 397 #define REMOVE 1 398 #define FIND 0 399 400 /* This code works around the fact that do_div cannot handle two 64-bit 401 numbers, and regular 64-bit division doesn't work on x86 kernels. 402 --Ben 403 */ 404 405 #define PG_DIV 0 406 407 /* This was emailed to LMKL by: Chris Caputo <ccaputo@alt.net> 408 * Function copied/adapted/optimized from: 409 * 410 * nemesis.sourceforge.net/browse/lib/static/intmath/ix86/intmath.c.html 411 * 412 * Copyright 1994, University of Cambridge Computer Laboratory 413 * All Rights Reserved. 414 * 415 */ 416 static inline s64 divremdi3(s64 x, s64 y, int type) 417 { 418 u64 a = (x < 0) ? -x : x; 419 u64 b = (y < 0) ? -y : y; 420 u64 res = 0, d = 1; 421 422 if (b > 0) { 423 while (b < a) { 424 b <<= 1; 425 d <<= 1; 426 } 427 } 428 429 do { 430 if (a >= b) { 431 a -= b; 432 res += d; 433 } 434 b >>= 1; 435 d >>= 1; 436 } 437 while (d); 438 439 if (PG_DIV == type) { 440 return (((x ^ y) & (1ll << 63)) == 0) ? res : -(s64) res; 441 } else { 442 return ((x & (1ll << 63)) == 0) ? a : -(s64) a; 443 } 444 } 445 446 /* End of hacks to deal with 64-bit math on x86 */ 447 448 /** Convert to milliseconds */ 449 static inline __u64 tv_to_ms(const struct timeval *tv) 450 { 451 __u64 ms = tv->tv_usec / 1000; 452 ms += (__u64) tv->tv_sec * (__u64) 1000; 453 return ms; 454 } 455 456 /** Convert to micro-seconds */ 457 static inline __u64 tv_to_us(const struct timeval *tv) 458 { 459 __u64 us = tv->tv_usec; 460 us += (__u64) tv->tv_sec * (__u64) 1000000; 461 return us; 462 } 463 464 static inline __u64 pg_div(__u64 n, __u32 base) 465 { 466 __u64 tmp = n; 467 do_div(tmp, base); 468 /* printk("pktgen: pg_div, n: %llu base: %d rv: %llu\n", 469 n, base, tmp); */ 470 return tmp; 471 } 472 473 static inline __u64 pg_div64(__u64 n, __u64 base) 474 { 475 __u64 tmp = n; 476 /* 477 * How do we know if the architecture we are running on 478 * supports division with 64 bit base? 479 * 480 */ 481 #if defined(__sparc_v9__) || defined(__powerpc64__) || defined(__alpha__) || defined(__x86_64__) || defined(__ia64__) 482 483 do_div(tmp, base); 484 #else 485 tmp = divremdi3(n, base, PG_DIV); 486 #endif 487 return tmp; 488 } 489 490 static inline __u64 getCurMs(void) 491 { 492 struct timeval tv; 493 do_gettimeofday(&tv); 494 return tv_to_ms(&tv); 495 } 496 497 static inline __u64 getCurUs(void) 498 { 499 struct timeval tv; 500 do_gettimeofday(&tv); 501 return tv_to_us(&tv); 502 } 503 504 static inline __u64 tv_diff(const struct timeval *a, const struct timeval *b) 505 { 506 return tv_to_us(a) - tv_to_us(b); 507 } 508 509 /* old include end */ 510 511 static char version[] __initdata = VERSION; 512 513 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i); 514 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname); 515 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 516 const char *ifname); 517 static int pktgen_device_event(struct notifier_block *, unsigned long, void *); 518 static void pktgen_run_all_threads(void); 519 static void pktgen_stop_all_threads_ifs(void); 520 static int pktgen_stop_device(struct pktgen_dev *pkt_dev); 521 static void pktgen_stop(struct pktgen_thread *t); 522 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); 523 524 static unsigned int scan_ip6(const char *s, char ip[16]); 525 static unsigned int fmt_ip6(char *s, const char ip[16]); 526 527 /* Module parameters, defaults. */ 528 static int pg_count_d = 1000; /* 1000 pkts by default */ 529 static int pg_delay_d; 530 static int pg_clone_skb_d; 531 static int debug; 532 533 static DEFINE_MUTEX(pktgen_thread_lock); 534 static LIST_HEAD(pktgen_threads); 535 536 static struct notifier_block pktgen_notifier_block = { 537 .notifier_call = pktgen_device_event, 538 }; 539 540 /* 541 * /proc handling functions 542 * 543 */ 544 545 static int pgctrl_show(struct seq_file *seq, void *v) 546 { 547 seq_puts(seq, VERSION); 548 return 0; 549 } 550 551 static ssize_t pgctrl_write(struct file *file, const char __user * buf, 552 size_t count, loff_t * ppos) 553 { 554 int err = 0; 555 char data[128]; 556 557 if (!capable(CAP_NET_ADMIN)) { 558 err = -EPERM; 559 goto out; 560 } 561 562 if (count > sizeof(data)) 563 count = sizeof(data); 564 565 if (copy_from_user(data, buf, count)) { 566 err = -EFAULT; 567 goto out; 568 } 569 data[count - 1] = 0; /* Make string */ 570 571 if (!strcmp(data, "stop")) 572 pktgen_stop_all_threads_ifs(); 573 574 else if (!strcmp(data, "start")) 575 pktgen_run_all_threads(); 576 577 else 578 printk(KERN_WARNING "pktgen: Unknown command: %s\n", data); 579 580 err = count; 581 582 out: 583 return err; 584 } 585 586 static int pgctrl_open(struct inode *inode, struct file *file) 587 { 588 return single_open(file, pgctrl_show, PDE(inode)->data); 589 } 590 591 static const struct file_operations pktgen_fops = { 592 .owner = THIS_MODULE, 593 .open = pgctrl_open, 594 .read = seq_read, 595 .llseek = seq_lseek, 596 .write = pgctrl_write, 597 .release = single_release, 598 }; 599 600 static int pktgen_if_show(struct seq_file *seq, void *v) 601 { 602 struct pktgen_dev *pkt_dev = seq->private; 603 __u64 sa; 604 __u64 stopped; 605 __u64 now = getCurUs(); 606 DECLARE_MAC_BUF(mac); 607 608 seq_printf(seq, 609 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", 610 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, 611 pkt_dev->max_pkt_size); 612 613 seq_printf(seq, 614 " frags: %d delay: %u clone_skb: %d ifname: %s\n", 615 pkt_dev->nfrags, 616 1000 * pkt_dev->delay_us + pkt_dev->delay_ns, 617 pkt_dev->clone_skb, pkt_dev->odev->name); 618 619 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, 620 pkt_dev->lflow); 621 622 seq_printf(seq, 623 " queue_map_min: %u queue_map_max: %u\n", 624 pkt_dev->queue_map_min, 625 pkt_dev->queue_map_max); 626 627 if (pkt_dev->flags & F_IPV6) { 628 char b1[128], b2[128], b3[128]; 629 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr); 630 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr); 631 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr); 632 seq_printf(seq, 633 " saddr: %s min_saddr: %s max_saddr: %s\n", b1, 634 b2, b3); 635 636 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr); 637 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr); 638 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr); 639 seq_printf(seq, 640 " daddr: %s min_daddr: %s max_daddr: %s\n", b1, 641 b2, b3); 642 643 } else 644 seq_printf(seq, 645 " dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n", 646 pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min, 647 pkt_dev->src_max); 648 649 seq_puts(seq, " src_mac: "); 650 651 seq_printf(seq, "%s ", 652 print_mac(mac, is_zero_ether_addr(pkt_dev->src_mac) ? 653 pkt_dev->odev->dev_addr : pkt_dev->src_mac)); 654 655 seq_printf(seq, "dst_mac: "); 656 seq_printf(seq, "%s\n", print_mac(mac, pkt_dev->dst_mac)); 657 658 seq_printf(seq, 659 " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n", 660 pkt_dev->udp_src_min, pkt_dev->udp_src_max, 661 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); 662 663 seq_printf(seq, 664 " src_mac_count: %d dst_mac_count: %d\n", 665 pkt_dev->src_mac_count, pkt_dev->dst_mac_count); 666 667 if (pkt_dev->nr_labels) { 668 unsigned i; 669 seq_printf(seq, " mpls: "); 670 for (i = 0; i < pkt_dev->nr_labels; i++) 671 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), 672 i == pkt_dev->nr_labels-1 ? "\n" : ", "); 673 } 674 675 if (pkt_dev->vlan_id != 0xffff) { 676 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", 677 pkt_dev->vlan_id, pkt_dev->vlan_p, pkt_dev->vlan_cfi); 678 } 679 680 if (pkt_dev->svlan_id != 0xffff) { 681 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", 682 pkt_dev->svlan_id, pkt_dev->svlan_p, pkt_dev->svlan_cfi); 683 } 684 685 if (pkt_dev->tos) { 686 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); 687 } 688 689 if (pkt_dev->traffic_class) { 690 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); 691 } 692 693 seq_printf(seq, " Flags: "); 694 695 if (pkt_dev->flags & F_IPV6) 696 seq_printf(seq, "IPV6 "); 697 698 if (pkt_dev->flags & F_IPSRC_RND) 699 seq_printf(seq, "IPSRC_RND "); 700 701 if (pkt_dev->flags & F_IPDST_RND) 702 seq_printf(seq, "IPDST_RND "); 703 704 if (pkt_dev->flags & F_TXSIZE_RND) 705 seq_printf(seq, "TXSIZE_RND "); 706 707 if (pkt_dev->flags & F_UDPSRC_RND) 708 seq_printf(seq, "UDPSRC_RND "); 709 710 if (pkt_dev->flags & F_UDPDST_RND) 711 seq_printf(seq, "UDPDST_RND "); 712 713 if (pkt_dev->flags & F_MPLS_RND) 714 seq_printf(seq, "MPLS_RND "); 715 716 if (pkt_dev->flags & F_QUEUE_MAP_RND) 717 seq_printf(seq, "QUEUE_MAP_RND "); 718 719 if (pkt_dev->cflows) { 720 if (pkt_dev->flags & F_FLOW_SEQ) 721 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/ 722 else 723 seq_printf(seq, "FLOW_RND "); 724 } 725 726 #ifdef CONFIG_XFRM 727 if (pkt_dev->flags & F_IPSEC_ON) 728 seq_printf(seq, "IPSEC "); 729 #endif 730 731 if (pkt_dev->flags & F_MACSRC_RND) 732 seq_printf(seq, "MACSRC_RND "); 733 734 if (pkt_dev->flags & F_MACDST_RND) 735 seq_printf(seq, "MACDST_RND "); 736 737 if (pkt_dev->flags & F_VID_RND) 738 seq_printf(seq, "VID_RND "); 739 740 if (pkt_dev->flags & F_SVID_RND) 741 seq_printf(seq, "SVID_RND "); 742 743 seq_puts(seq, "\n"); 744 745 sa = pkt_dev->started_at; 746 stopped = pkt_dev->stopped_at; 747 if (pkt_dev->running) 748 stopped = now; /* not really stopped, more like last-running-at */ 749 750 seq_printf(seq, 751 "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n", 752 (unsigned long long)pkt_dev->sofar, 753 (unsigned long long)pkt_dev->errors, (unsigned long long)sa, 754 (unsigned long long)stopped, 755 (unsigned long long)pkt_dev->idle_acc); 756 757 seq_printf(seq, 758 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 759 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, 760 pkt_dev->cur_src_mac_offset); 761 762 if (pkt_dev->flags & F_IPV6) { 763 char b1[128], b2[128]; 764 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr); 765 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr); 766 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1); 767 } else 768 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n", 769 pkt_dev->cur_saddr, pkt_dev->cur_daddr); 770 771 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", 772 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 773 774 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); 775 776 seq_printf(seq, " flows: %u\n", pkt_dev->nflows); 777 778 if (pkt_dev->result[0]) 779 seq_printf(seq, "Result: %s\n", pkt_dev->result); 780 else 781 seq_printf(seq, "Result: Idle\n"); 782 783 return 0; 784 } 785 786 787 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, __u32 *num) 788 { 789 int i = 0; 790 *num = 0; 791 792 for (; i < maxlen; i++) { 793 char c; 794 *num <<= 4; 795 if (get_user(c, &user_buffer[i])) 796 return -EFAULT; 797 if ((c >= '0') && (c <= '9')) 798 *num |= c - '0'; 799 else if ((c >= 'a') && (c <= 'f')) 800 *num |= c - 'a' + 10; 801 else if ((c >= 'A') && (c <= 'F')) 802 *num |= c - 'A' + 10; 803 else 804 break; 805 } 806 return i; 807 } 808 809 static int count_trail_chars(const char __user * user_buffer, 810 unsigned int maxlen) 811 { 812 int i; 813 814 for (i = 0; i < maxlen; i++) { 815 char c; 816 if (get_user(c, &user_buffer[i])) 817 return -EFAULT; 818 switch (c) { 819 case '\"': 820 case '\n': 821 case '\r': 822 case '\t': 823 case ' ': 824 case '=': 825 break; 826 default: 827 goto done; 828 } 829 } 830 done: 831 return i; 832 } 833 834 static unsigned long num_arg(const char __user * user_buffer, 835 unsigned long maxlen, unsigned long *num) 836 { 837 int i = 0; 838 *num = 0; 839 840 for (; i < maxlen; i++) { 841 char c; 842 if (get_user(c, &user_buffer[i])) 843 return -EFAULT; 844 if ((c >= '0') && (c <= '9')) { 845 *num *= 10; 846 *num += c - '0'; 847 } else 848 break; 849 } 850 return i; 851 } 852 853 static int strn_len(const char __user * user_buffer, unsigned int maxlen) 854 { 855 int i = 0; 856 857 for (; i < maxlen; i++) { 858 char c; 859 if (get_user(c, &user_buffer[i])) 860 return -EFAULT; 861 switch (c) { 862 case '\"': 863 case '\n': 864 case '\r': 865 case '\t': 866 case ' ': 867 goto done_str; 868 break; 869 default: 870 break; 871 } 872 } 873 done_str: 874 return i; 875 } 876 877 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) 878 { 879 unsigned n = 0; 880 char c; 881 ssize_t i = 0; 882 int len; 883 884 pkt_dev->nr_labels = 0; 885 do { 886 __u32 tmp; 887 len = hex32_arg(&buffer[i], 8, &tmp); 888 if (len <= 0) 889 return len; 890 pkt_dev->labels[n] = htonl(tmp); 891 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 892 pkt_dev->flags |= F_MPLS_RND; 893 i += len; 894 if (get_user(c, &buffer[i])) 895 return -EFAULT; 896 i++; 897 n++; 898 if (n >= MAX_MPLS_LABELS) 899 return -E2BIG; 900 } while (c == ','); 901 902 pkt_dev->nr_labels = n; 903 return i; 904 } 905 906 static ssize_t pktgen_if_write(struct file *file, 907 const char __user * user_buffer, size_t count, 908 loff_t * offset) 909 { 910 struct seq_file *seq = (struct seq_file *)file->private_data; 911 struct pktgen_dev *pkt_dev = seq->private; 912 int i = 0, max, len; 913 char name[16], valstr[32]; 914 unsigned long value = 0; 915 char *pg_result = NULL; 916 int tmp = 0; 917 char buf[128]; 918 919 pg_result = &(pkt_dev->result[0]); 920 921 if (count < 1) { 922 printk(KERN_WARNING "pktgen: wrong command format\n"); 923 return -EINVAL; 924 } 925 926 max = count - i; 927 tmp = count_trail_chars(&user_buffer[i], max); 928 if (tmp < 0) { 929 printk(KERN_WARNING "pktgen: illegal format\n"); 930 return tmp; 931 } 932 i += tmp; 933 934 /* Read variable name */ 935 936 len = strn_len(&user_buffer[i], sizeof(name) - 1); 937 if (len < 0) { 938 return len; 939 } 940 memset(name, 0, sizeof(name)); 941 if (copy_from_user(name, &user_buffer[i], len)) 942 return -EFAULT; 943 i += len; 944 945 max = count - i; 946 len = count_trail_chars(&user_buffer[i], max); 947 if (len < 0) 948 return len; 949 950 i += len; 951 952 if (debug) { 953 char tb[count + 1]; 954 if (copy_from_user(tb, user_buffer, count)) 955 return -EFAULT; 956 tb[count] = 0; 957 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name, 958 (unsigned long)count, tb); 959 } 960 961 if (!strcmp(name, "min_pkt_size")) { 962 len = num_arg(&user_buffer[i], 10, &value); 963 if (len < 0) { 964 return len; 965 } 966 i += len; 967 if (value < 14 + 20 + 8) 968 value = 14 + 20 + 8; 969 if (value != pkt_dev->min_pkt_size) { 970 pkt_dev->min_pkt_size = value; 971 pkt_dev->cur_pkt_size = value; 972 } 973 sprintf(pg_result, "OK: min_pkt_size=%u", 974 pkt_dev->min_pkt_size); 975 return count; 976 } 977 978 if (!strcmp(name, "max_pkt_size")) { 979 len = num_arg(&user_buffer[i], 10, &value); 980 if (len < 0) { 981 return len; 982 } 983 i += len; 984 if (value < 14 + 20 + 8) 985 value = 14 + 20 + 8; 986 if (value != pkt_dev->max_pkt_size) { 987 pkt_dev->max_pkt_size = value; 988 pkt_dev->cur_pkt_size = value; 989 } 990 sprintf(pg_result, "OK: max_pkt_size=%u", 991 pkt_dev->max_pkt_size); 992 return count; 993 } 994 995 /* Shortcut for min = max */ 996 997 if (!strcmp(name, "pkt_size")) { 998 len = num_arg(&user_buffer[i], 10, &value); 999 if (len < 0) { 1000 return len; 1001 } 1002 i += len; 1003 if (value < 14 + 20 + 8) 1004 value = 14 + 20 + 8; 1005 if (value != pkt_dev->min_pkt_size) { 1006 pkt_dev->min_pkt_size = value; 1007 pkt_dev->max_pkt_size = value; 1008 pkt_dev->cur_pkt_size = value; 1009 } 1010 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 1011 return count; 1012 } 1013 1014 if (!strcmp(name, "debug")) { 1015 len = num_arg(&user_buffer[i], 10, &value); 1016 if (len < 0) { 1017 return len; 1018 } 1019 i += len; 1020 debug = value; 1021 sprintf(pg_result, "OK: debug=%u", debug); 1022 return count; 1023 } 1024 1025 if (!strcmp(name, "frags")) { 1026 len = num_arg(&user_buffer[i], 10, &value); 1027 if (len < 0) { 1028 return len; 1029 } 1030 i += len; 1031 pkt_dev->nfrags = value; 1032 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 1033 return count; 1034 } 1035 if (!strcmp(name, "delay")) { 1036 len = num_arg(&user_buffer[i], 10, &value); 1037 if (len < 0) { 1038 return len; 1039 } 1040 i += len; 1041 if (value == 0x7FFFFFFF) { 1042 pkt_dev->delay_us = 0x7FFFFFFF; 1043 pkt_dev->delay_ns = 0; 1044 } else { 1045 pkt_dev->delay_us = value / 1000; 1046 pkt_dev->delay_ns = value % 1000; 1047 } 1048 sprintf(pg_result, "OK: delay=%u", 1049 1000 * pkt_dev->delay_us + pkt_dev->delay_ns); 1050 return count; 1051 } 1052 if (!strcmp(name, "udp_src_min")) { 1053 len = num_arg(&user_buffer[i], 10, &value); 1054 if (len < 0) { 1055 return len; 1056 } 1057 i += len; 1058 if (value != pkt_dev->udp_src_min) { 1059 pkt_dev->udp_src_min = value; 1060 pkt_dev->cur_udp_src = value; 1061 } 1062 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 1063 return count; 1064 } 1065 if (!strcmp(name, "udp_dst_min")) { 1066 len = num_arg(&user_buffer[i], 10, &value); 1067 if (len < 0) { 1068 return len; 1069 } 1070 i += len; 1071 if (value != pkt_dev->udp_dst_min) { 1072 pkt_dev->udp_dst_min = value; 1073 pkt_dev->cur_udp_dst = value; 1074 } 1075 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 1076 return count; 1077 } 1078 if (!strcmp(name, "udp_src_max")) { 1079 len = num_arg(&user_buffer[i], 10, &value); 1080 if (len < 0) { 1081 return len; 1082 } 1083 i += len; 1084 if (value != pkt_dev->udp_src_max) { 1085 pkt_dev->udp_src_max = value; 1086 pkt_dev->cur_udp_src = value; 1087 } 1088 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 1089 return count; 1090 } 1091 if (!strcmp(name, "udp_dst_max")) { 1092 len = num_arg(&user_buffer[i], 10, &value); 1093 if (len < 0) { 1094 return len; 1095 } 1096 i += len; 1097 if (value != pkt_dev->udp_dst_max) { 1098 pkt_dev->udp_dst_max = value; 1099 pkt_dev->cur_udp_dst = value; 1100 } 1101 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1102 return count; 1103 } 1104 if (!strcmp(name, "clone_skb")) { 1105 len = num_arg(&user_buffer[i], 10, &value); 1106 if (len < 0) { 1107 return len; 1108 } 1109 i += len; 1110 pkt_dev->clone_skb = value; 1111 1112 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1113 return count; 1114 } 1115 if (!strcmp(name, "count")) { 1116 len = num_arg(&user_buffer[i], 10, &value); 1117 if (len < 0) { 1118 return len; 1119 } 1120 i += len; 1121 pkt_dev->count = value; 1122 sprintf(pg_result, "OK: count=%llu", 1123 (unsigned long long)pkt_dev->count); 1124 return count; 1125 } 1126 if (!strcmp(name, "src_mac_count")) { 1127 len = num_arg(&user_buffer[i], 10, &value); 1128 if (len < 0) { 1129 return len; 1130 } 1131 i += len; 1132 if (pkt_dev->src_mac_count != value) { 1133 pkt_dev->src_mac_count = value; 1134 pkt_dev->cur_src_mac_offset = 0; 1135 } 1136 sprintf(pg_result, "OK: src_mac_count=%d", 1137 pkt_dev->src_mac_count); 1138 return count; 1139 } 1140 if (!strcmp(name, "dst_mac_count")) { 1141 len = num_arg(&user_buffer[i], 10, &value); 1142 if (len < 0) { 1143 return len; 1144 } 1145 i += len; 1146 if (pkt_dev->dst_mac_count != value) { 1147 pkt_dev->dst_mac_count = value; 1148 pkt_dev->cur_dst_mac_offset = 0; 1149 } 1150 sprintf(pg_result, "OK: dst_mac_count=%d", 1151 pkt_dev->dst_mac_count); 1152 return count; 1153 } 1154 if (!strcmp(name, "flag")) { 1155 char f[32]; 1156 memset(f, 0, 32); 1157 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1158 if (len < 0) { 1159 return len; 1160 } 1161 if (copy_from_user(f, &user_buffer[i], len)) 1162 return -EFAULT; 1163 i += len; 1164 if (strcmp(f, "IPSRC_RND") == 0) 1165 pkt_dev->flags |= F_IPSRC_RND; 1166 1167 else if (strcmp(f, "!IPSRC_RND") == 0) 1168 pkt_dev->flags &= ~F_IPSRC_RND; 1169 1170 else if (strcmp(f, "TXSIZE_RND") == 0) 1171 pkt_dev->flags |= F_TXSIZE_RND; 1172 1173 else if (strcmp(f, "!TXSIZE_RND") == 0) 1174 pkt_dev->flags &= ~F_TXSIZE_RND; 1175 1176 else if (strcmp(f, "IPDST_RND") == 0) 1177 pkt_dev->flags |= F_IPDST_RND; 1178 1179 else if (strcmp(f, "!IPDST_RND") == 0) 1180 pkt_dev->flags &= ~F_IPDST_RND; 1181 1182 else if (strcmp(f, "UDPSRC_RND") == 0) 1183 pkt_dev->flags |= F_UDPSRC_RND; 1184 1185 else if (strcmp(f, "!UDPSRC_RND") == 0) 1186 pkt_dev->flags &= ~F_UDPSRC_RND; 1187 1188 else if (strcmp(f, "UDPDST_RND") == 0) 1189 pkt_dev->flags |= F_UDPDST_RND; 1190 1191 else if (strcmp(f, "!UDPDST_RND") == 0) 1192 pkt_dev->flags &= ~F_UDPDST_RND; 1193 1194 else if (strcmp(f, "MACSRC_RND") == 0) 1195 pkt_dev->flags |= F_MACSRC_RND; 1196 1197 else if (strcmp(f, "!MACSRC_RND") == 0) 1198 pkt_dev->flags &= ~F_MACSRC_RND; 1199 1200 else if (strcmp(f, "MACDST_RND") == 0) 1201 pkt_dev->flags |= F_MACDST_RND; 1202 1203 else if (strcmp(f, "!MACDST_RND") == 0) 1204 pkt_dev->flags &= ~F_MACDST_RND; 1205 1206 else if (strcmp(f, "MPLS_RND") == 0) 1207 pkt_dev->flags |= F_MPLS_RND; 1208 1209 else if (strcmp(f, "!MPLS_RND") == 0) 1210 pkt_dev->flags &= ~F_MPLS_RND; 1211 1212 else if (strcmp(f, "VID_RND") == 0) 1213 pkt_dev->flags |= F_VID_RND; 1214 1215 else if (strcmp(f, "!VID_RND") == 0) 1216 pkt_dev->flags &= ~F_VID_RND; 1217 1218 else if (strcmp(f, "SVID_RND") == 0) 1219 pkt_dev->flags |= F_SVID_RND; 1220 1221 else if (strcmp(f, "!SVID_RND") == 0) 1222 pkt_dev->flags &= ~F_SVID_RND; 1223 1224 else if (strcmp(f, "FLOW_SEQ") == 0) 1225 pkt_dev->flags |= F_FLOW_SEQ; 1226 1227 else if (strcmp(f, "QUEUE_MAP_RND") == 0) 1228 pkt_dev->flags |= F_QUEUE_MAP_RND; 1229 1230 else if (strcmp(f, "!QUEUE_MAP_RND") == 0) 1231 pkt_dev->flags &= ~F_QUEUE_MAP_RND; 1232 #ifdef CONFIG_XFRM 1233 else if (strcmp(f, "IPSEC") == 0) 1234 pkt_dev->flags |= F_IPSEC_ON; 1235 #endif 1236 1237 else if (strcmp(f, "!IPV6") == 0) 1238 pkt_dev->flags &= ~F_IPV6; 1239 1240 else { 1241 sprintf(pg_result, 1242 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1243 f, 1244 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1245 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC\n"); 1246 return count; 1247 } 1248 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1249 return count; 1250 } 1251 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1252 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1253 if (len < 0) { 1254 return len; 1255 } 1256 1257 if (copy_from_user(buf, &user_buffer[i], len)) 1258 return -EFAULT; 1259 buf[len] = 0; 1260 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1261 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1262 strncpy(pkt_dev->dst_min, buf, len); 1263 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1264 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1265 } 1266 if (debug) 1267 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n", 1268 pkt_dev->dst_min); 1269 i += len; 1270 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1271 return count; 1272 } 1273 if (!strcmp(name, "dst_max")) { 1274 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1275 if (len < 0) { 1276 return len; 1277 } 1278 1279 if (copy_from_user(buf, &user_buffer[i], len)) 1280 return -EFAULT; 1281 1282 buf[len] = 0; 1283 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1284 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1285 strncpy(pkt_dev->dst_max, buf, len); 1286 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1287 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1288 } 1289 if (debug) 1290 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n", 1291 pkt_dev->dst_max); 1292 i += len; 1293 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1294 return count; 1295 } 1296 if (!strcmp(name, "dst6")) { 1297 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1298 if (len < 0) 1299 return len; 1300 1301 pkt_dev->flags |= F_IPV6; 1302 1303 if (copy_from_user(buf, &user_buffer[i], len)) 1304 return -EFAULT; 1305 buf[len] = 0; 1306 1307 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1308 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1309 1310 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr); 1311 1312 if (debug) 1313 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf); 1314 1315 i += len; 1316 sprintf(pg_result, "OK: dst6=%s", buf); 1317 return count; 1318 } 1319 if (!strcmp(name, "dst6_min")) { 1320 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1321 if (len < 0) 1322 return len; 1323 1324 pkt_dev->flags |= F_IPV6; 1325 1326 if (copy_from_user(buf, &user_buffer[i], len)) 1327 return -EFAULT; 1328 buf[len] = 0; 1329 1330 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1331 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1332 1333 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, 1334 &pkt_dev->min_in6_daddr); 1335 if (debug) 1336 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf); 1337 1338 i += len; 1339 sprintf(pg_result, "OK: dst6_min=%s", buf); 1340 return count; 1341 } 1342 if (!strcmp(name, "dst6_max")) { 1343 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1344 if (len < 0) 1345 return len; 1346 1347 pkt_dev->flags |= F_IPV6; 1348 1349 if (copy_from_user(buf, &user_buffer[i], len)) 1350 return -EFAULT; 1351 buf[len] = 0; 1352 1353 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1354 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1355 1356 if (debug) 1357 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf); 1358 1359 i += len; 1360 sprintf(pg_result, "OK: dst6_max=%s", buf); 1361 return count; 1362 } 1363 if (!strcmp(name, "src6")) { 1364 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1365 if (len < 0) 1366 return len; 1367 1368 pkt_dev->flags |= F_IPV6; 1369 1370 if (copy_from_user(buf, &user_buffer[i], len)) 1371 return -EFAULT; 1372 buf[len] = 0; 1373 1374 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1375 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1376 1377 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr); 1378 1379 if (debug) 1380 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf); 1381 1382 i += len; 1383 sprintf(pg_result, "OK: src6=%s", buf); 1384 return count; 1385 } 1386 if (!strcmp(name, "src_min")) { 1387 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1388 if (len < 0) { 1389 return len; 1390 } 1391 if (copy_from_user(buf, &user_buffer[i], len)) 1392 return -EFAULT; 1393 buf[len] = 0; 1394 if (strcmp(buf, pkt_dev->src_min) != 0) { 1395 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1396 strncpy(pkt_dev->src_min, buf, len); 1397 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1398 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1399 } 1400 if (debug) 1401 printk(KERN_DEBUG "pktgen: src_min set to: %s\n", 1402 pkt_dev->src_min); 1403 i += len; 1404 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1405 return count; 1406 } 1407 if (!strcmp(name, "src_max")) { 1408 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1409 if (len < 0) { 1410 return len; 1411 } 1412 if (copy_from_user(buf, &user_buffer[i], len)) 1413 return -EFAULT; 1414 buf[len] = 0; 1415 if (strcmp(buf, pkt_dev->src_max) != 0) { 1416 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1417 strncpy(pkt_dev->src_max, buf, len); 1418 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1419 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1420 } 1421 if (debug) 1422 printk(KERN_DEBUG "pktgen: src_max set to: %s\n", 1423 pkt_dev->src_max); 1424 i += len; 1425 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1426 return count; 1427 } 1428 if (!strcmp(name, "dst_mac")) { 1429 char *v = valstr; 1430 unsigned char old_dmac[ETH_ALEN]; 1431 unsigned char *m = pkt_dev->dst_mac; 1432 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN); 1433 1434 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1435 if (len < 0) { 1436 return len; 1437 } 1438 memset(valstr, 0, sizeof(valstr)); 1439 if (copy_from_user(valstr, &user_buffer[i], len)) 1440 return -EFAULT; 1441 i += len; 1442 1443 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) { 1444 if (*v >= '0' && *v <= '9') { 1445 *m *= 16; 1446 *m += *v - '0'; 1447 } 1448 if (*v >= 'A' && *v <= 'F') { 1449 *m *= 16; 1450 *m += *v - 'A' + 10; 1451 } 1452 if (*v >= 'a' && *v <= 'f') { 1453 *m *= 16; 1454 *m += *v - 'a' + 10; 1455 } 1456 if (*v == ':') { 1457 m++; 1458 *m = 0; 1459 } 1460 } 1461 1462 /* Set up Dest MAC */ 1463 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac)) 1464 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 1465 1466 sprintf(pg_result, "OK: dstmac"); 1467 return count; 1468 } 1469 if (!strcmp(name, "src_mac")) { 1470 char *v = valstr; 1471 unsigned char old_smac[ETH_ALEN]; 1472 unsigned char *m = pkt_dev->src_mac; 1473 1474 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN); 1475 1476 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1477 if (len < 0) { 1478 return len; 1479 } 1480 memset(valstr, 0, sizeof(valstr)); 1481 if (copy_from_user(valstr, &user_buffer[i], len)) 1482 return -EFAULT; 1483 i += len; 1484 1485 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) { 1486 if (*v >= '0' && *v <= '9') { 1487 *m *= 16; 1488 *m += *v - '0'; 1489 } 1490 if (*v >= 'A' && *v <= 'F') { 1491 *m *= 16; 1492 *m += *v - 'A' + 10; 1493 } 1494 if (*v >= 'a' && *v <= 'f') { 1495 *m *= 16; 1496 *m += *v - 'a' + 10; 1497 } 1498 if (*v == ':') { 1499 m++; 1500 *m = 0; 1501 } 1502 } 1503 1504 /* Set up Src MAC */ 1505 if (compare_ether_addr(old_smac, pkt_dev->src_mac)) 1506 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN); 1507 1508 sprintf(pg_result, "OK: srcmac"); 1509 return count; 1510 } 1511 1512 if (!strcmp(name, "clear_counters")) { 1513 pktgen_clear_counters(pkt_dev); 1514 sprintf(pg_result, "OK: Clearing counters.\n"); 1515 return count; 1516 } 1517 1518 if (!strcmp(name, "flows")) { 1519 len = num_arg(&user_buffer[i], 10, &value); 1520 if (len < 0) { 1521 return len; 1522 } 1523 i += len; 1524 if (value > MAX_CFLOWS) 1525 value = MAX_CFLOWS; 1526 1527 pkt_dev->cflows = value; 1528 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1529 return count; 1530 } 1531 1532 if (!strcmp(name, "flowlen")) { 1533 len = num_arg(&user_buffer[i], 10, &value); 1534 if (len < 0) { 1535 return len; 1536 } 1537 i += len; 1538 pkt_dev->lflow = value; 1539 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1540 return count; 1541 } 1542 1543 if (!strcmp(name, "queue_map_min")) { 1544 len = num_arg(&user_buffer[i], 5, &value); 1545 if (len < 0) { 1546 return len; 1547 } 1548 i += len; 1549 pkt_dev->queue_map_min = value; 1550 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1551 return count; 1552 } 1553 1554 if (!strcmp(name, "queue_map_max")) { 1555 len = num_arg(&user_buffer[i], 5, &value); 1556 if (len < 0) { 1557 return len; 1558 } 1559 i += len; 1560 pkt_dev->queue_map_max = value; 1561 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1562 return count; 1563 } 1564 1565 if (!strcmp(name, "mpls")) { 1566 unsigned n, cnt; 1567 1568 len = get_labels(&user_buffer[i], pkt_dev); 1569 if (len < 0) 1570 return len; 1571 i += len; 1572 cnt = sprintf(pg_result, "OK: mpls="); 1573 for (n = 0; n < pkt_dev->nr_labels; n++) 1574 cnt += sprintf(pg_result + cnt, 1575 "%08x%s", ntohl(pkt_dev->labels[n]), 1576 n == pkt_dev->nr_labels-1 ? "" : ","); 1577 1578 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1579 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1580 pkt_dev->svlan_id = 0xffff; 1581 1582 if (debug) 1583 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n"); 1584 } 1585 return count; 1586 } 1587 1588 if (!strcmp(name, "vlan_id")) { 1589 len = num_arg(&user_buffer[i], 4, &value); 1590 if (len < 0) { 1591 return len; 1592 } 1593 i += len; 1594 if (value <= 4095) { 1595 pkt_dev->vlan_id = value; /* turn on VLAN */ 1596 1597 if (debug) 1598 printk(KERN_DEBUG "pktgen: VLAN turned on\n"); 1599 1600 if (debug && pkt_dev->nr_labels) 1601 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1602 1603 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1604 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1605 } else { 1606 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1607 pkt_dev->svlan_id = 0xffff; 1608 1609 if (debug) 1610 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1611 } 1612 return count; 1613 } 1614 1615 if (!strcmp(name, "vlan_p")) { 1616 len = num_arg(&user_buffer[i], 1, &value); 1617 if (len < 0) { 1618 return len; 1619 } 1620 i += len; 1621 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1622 pkt_dev->vlan_p = value; 1623 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1624 } else { 1625 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1626 } 1627 return count; 1628 } 1629 1630 if (!strcmp(name, "vlan_cfi")) { 1631 len = num_arg(&user_buffer[i], 1, &value); 1632 if (len < 0) { 1633 return len; 1634 } 1635 i += len; 1636 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1637 pkt_dev->vlan_cfi = value; 1638 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1639 } else { 1640 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1641 } 1642 return count; 1643 } 1644 1645 if (!strcmp(name, "svlan_id")) { 1646 len = num_arg(&user_buffer[i], 4, &value); 1647 if (len < 0) { 1648 return len; 1649 } 1650 i += len; 1651 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1652 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1653 1654 if (debug) 1655 printk(KERN_DEBUG "pktgen: SVLAN turned on\n"); 1656 1657 if (debug && pkt_dev->nr_labels) 1658 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1659 1660 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1661 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1662 } else { 1663 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1664 pkt_dev->svlan_id = 0xffff; 1665 1666 if (debug) 1667 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1668 } 1669 return count; 1670 } 1671 1672 if (!strcmp(name, "svlan_p")) { 1673 len = num_arg(&user_buffer[i], 1, &value); 1674 if (len < 0) { 1675 return len; 1676 } 1677 i += len; 1678 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1679 pkt_dev->svlan_p = value; 1680 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1681 } else { 1682 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1683 } 1684 return count; 1685 } 1686 1687 if (!strcmp(name, "svlan_cfi")) { 1688 len = num_arg(&user_buffer[i], 1, &value); 1689 if (len < 0) { 1690 return len; 1691 } 1692 i += len; 1693 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1694 pkt_dev->svlan_cfi = value; 1695 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1696 } else { 1697 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1698 } 1699 return count; 1700 } 1701 1702 if (!strcmp(name, "tos")) { 1703 __u32 tmp_value = 0; 1704 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1705 if (len < 0) { 1706 return len; 1707 } 1708 i += len; 1709 if (len == 2) { 1710 pkt_dev->tos = tmp_value; 1711 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1712 } else { 1713 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1714 } 1715 return count; 1716 } 1717 1718 if (!strcmp(name, "traffic_class")) { 1719 __u32 tmp_value = 0; 1720 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1721 if (len < 0) { 1722 return len; 1723 } 1724 i += len; 1725 if (len == 2) { 1726 pkt_dev->traffic_class = tmp_value; 1727 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1728 } else { 1729 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1730 } 1731 return count; 1732 } 1733 1734 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1735 return -EINVAL; 1736 } 1737 1738 static int pktgen_if_open(struct inode *inode, struct file *file) 1739 { 1740 return single_open(file, pktgen_if_show, PDE(inode)->data); 1741 } 1742 1743 static const struct file_operations pktgen_if_fops = { 1744 .owner = THIS_MODULE, 1745 .open = pktgen_if_open, 1746 .read = seq_read, 1747 .llseek = seq_lseek, 1748 .write = pktgen_if_write, 1749 .release = single_release, 1750 }; 1751 1752 static int pktgen_thread_show(struct seq_file *seq, void *v) 1753 { 1754 struct pktgen_thread *t = seq->private; 1755 struct pktgen_dev *pkt_dev; 1756 1757 BUG_ON(!t); 1758 1759 seq_printf(seq, "Running: "); 1760 1761 if_lock(t); 1762 list_for_each_entry(pkt_dev, &t->if_list, list) 1763 if (pkt_dev->running) 1764 seq_printf(seq, "%s ", pkt_dev->odev->name); 1765 1766 seq_printf(seq, "\nStopped: "); 1767 1768 list_for_each_entry(pkt_dev, &t->if_list, list) 1769 if (!pkt_dev->running) 1770 seq_printf(seq, "%s ", pkt_dev->odev->name); 1771 1772 if (t->result[0]) 1773 seq_printf(seq, "\nResult: %s\n", t->result); 1774 else 1775 seq_printf(seq, "\nResult: NA\n"); 1776 1777 if_unlock(t); 1778 1779 return 0; 1780 } 1781 1782 static ssize_t pktgen_thread_write(struct file *file, 1783 const char __user * user_buffer, 1784 size_t count, loff_t * offset) 1785 { 1786 struct seq_file *seq = (struct seq_file *)file->private_data; 1787 struct pktgen_thread *t = seq->private; 1788 int i = 0, max, len, ret; 1789 char name[40]; 1790 char *pg_result; 1791 1792 if (count < 1) { 1793 // sprintf(pg_result, "Wrong command format"); 1794 return -EINVAL; 1795 } 1796 1797 max = count - i; 1798 len = count_trail_chars(&user_buffer[i], max); 1799 if (len < 0) 1800 return len; 1801 1802 i += len; 1803 1804 /* Read variable name */ 1805 1806 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1807 if (len < 0) 1808 return len; 1809 1810 memset(name, 0, sizeof(name)); 1811 if (copy_from_user(name, &user_buffer[i], len)) 1812 return -EFAULT; 1813 i += len; 1814 1815 max = count - i; 1816 len = count_trail_chars(&user_buffer[i], max); 1817 if (len < 0) 1818 return len; 1819 1820 i += len; 1821 1822 if (debug) 1823 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n", 1824 name, (unsigned long)count); 1825 1826 if (!t) { 1827 printk(KERN_ERR "pktgen: ERROR: No thread\n"); 1828 ret = -EINVAL; 1829 goto out; 1830 } 1831 1832 pg_result = &(t->result[0]); 1833 1834 if (!strcmp(name, "add_device")) { 1835 char f[32]; 1836 memset(f, 0, 32); 1837 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1838 if (len < 0) { 1839 ret = len; 1840 goto out; 1841 } 1842 if (copy_from_user(f, &user_buffer[i], len)) 1843 return -EFAULT; 1844 i += len; 1845 mutex_lock(&pktgen_thread_lock); 1846 pktgen_add_device(t, f); 1847 mutex_unlock(&pktgen_thread_lock); 1848 ret = count; 1849 sprintf(pg_result, "OK: add_device=%s", f); 1850 goto out; 1851 } 1852 1853 if (!strcmp(name, "rem_device_all")) { 1854 mutex_lock(&pktgen_thread_lock); 1855 t->control |= T_REMDEVALL; 1856 mutex_unlock(&pktgen_thread_lock); 1857 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1858 ret = count; 1859 sprintf(pg_result, "OK: rem_device_all"); 1860 goto out; 1861 } 1862 1863 if (!strcmp(name, "max_before_softirq")) { 1864 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1865 ret = count; 1866 goto out; 1867 } 1868 1869 ret = -EINVAL; 1870 out: 1871 return ret; 1872 } 1873 1874 static int pktgen_thread_open(struct inode *inode, struct file *file) 1875 { 1876 return single_open(file, pktgen_thread_show, PDE(inode)->data); 1877 } 1878 1879 static const struct file_operations pktgen_thread_fops = { 1880 .owner = THIS_MODULE, 1881 .open = pktgen_thread_open, 1882 .read = seq_read, 1883 .llseek = seq_lseek, 1884 .write = pktgen_thread_write, 1885 .release = single_release, 1886 }; 1887 1888 /* Think find or remove for NN */ 1889 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove) 1890 { 1891 struct pktgen_thread *t; 1892 struct pktgen_dev *pkt_dev = NULL; 1893 1894 list_for_each_entry(t, &pktgen_threads, th_list) { 1895 pkt_dev = pktgen_find_dev(t, ifname); 1896 if (pkt_dev) { 1897 if (remove) { 1898 if_lock(t); 1899 pkt_dev->removal_mark = 1; 1900 t->control |= T_REMDEV; 1901 if_unlock(t); 1902 } 1903 break; 1904 } 1905 } 1906 return pkt_dev; 1907 } 1908 1909 /* 1910 * mark a device for removal 1911 */ 1912 static void pktgen_mark_device(const char *ifname) 1913 { 1914 struct pktgen_dev *pkt_dev = NULL; 1915 const int max_tries = 10, msec_per_try = 125; 1916 int i = 0; 1917 1918 mutex_lock(&pktgen_thread_lock); 1919 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname); 1920 1921 while (1) { 1922 1923 pkt_dev = __pktgen_NN_threads(ifname, REMOVE); 1924 if (pkt_dev == NULL) 1925 break; /* success */ 1926 1927 mutex_unlock(&pktgen_thread_lock); 1928 pr_debug("pktgen: pktgen_mark_device waiting for %s " 1929 "to disappear....\n", ifname); 1930 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1931 mutex_lock(&pktgen_thread_lock); 1932 1933 if (++i >= max_tries) { 1934 printk(KERN_ERR "pktgen_mark_device: timed out after " 1935 "waiting %d msec for device %s to be removed\n", 1936 msec_per_try * i, ifname); 1937 break; 1938 } 1939 1940 } 1941 1942 mutex_unlock(&pktgen_thread_lock); 1943 } 1944 1945 static void pktgen_change_name(struct net_device *dev) 1946 { 1947 struct pktgen_thread *t; 1948 1949 list_for_each_entry(t, &pktgen_threads, th_list) { 1950 struct pktgen_dev *pkt_dev; 1951 1952 list_for_each_entry(pkt_dev, &t->if_list, list) { 1953 if (pkt_dev->odev != dev) 1954 continue; 1955 1956 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 1957 1958 pkt_dev->entry = create_proc_entry(dev->name, 0600, 1959 pg_proc_dir); 1960 if (!pkt_dev->entry) 1961 printk(KERN_ERR "pktgen: can't move proc " 1962 " entry for '%s'\n", dev->name); 1963 break; 1964 } 1965 } 1966 } 1967 1968 static int pktgen_device_event(struct notifier_block *unused, 1969 unsigned long event, void *ptr) 1970 { 1971 struct net_device *dev = ptr; 1972 1973 if (dev->nd_net != &init_net) 1974 return NOTIFY_DONE; 1975 1976 /* It is OK that we do not hold the group lock right now, 1977 * as we run under the RTNL lock. 1978 */ 1979 1980 switch (event) { 1981 case NETDEV_CHANGENAME: 1982 pktgen_change_name(dev); 1983 break; 1984 1985 case NETDEV_UNREGISTER: 1986 pktgen_mark_device(dev->name); 1987 break; 1988 } 1989 1990 return NOTIFY_DONE; 1991 } 1992 1993 /* Associate pktgen_dev with a device. */ 1994 1995 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname) 1996 { 1997 struct net_device *odev; 1998 int err; 1999 2000 /* Clean old setups */ 2001 if (pkt_dev->odev) { 2002 dev_put(pkt_dev->odev); 2003 pkt_dev->odev = NULL; 2004 } 2005 2006 odev = dev_get_by_name(&init_net, ifname); 2007 if (!odev) { 2008 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname); 2009 return -ENODEV; 2010 } 2011 2012 if (odev->type != ARPHRD_ETHER) { 2013 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname); 2014 err = -EINVAL; 2015 } else if (!netif_running(odev)) { 2016 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname); 2017 err = -ENETDOWN; 2018 } else { 2019 pkt_dev->odev = odev; 2020 return 0; 2021 } 2022 2023 dev_put(odev); 2024 return err; 2025 } 2026 2027 /* Read pkt_dev from the interface and set up internal pktgen_dev 2028 * structure to have the right information to create/send packets 2029 */ 2030 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 2031 { 2032 if (!pkt_dev->odev) { 2033 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in " 2034 "setup_inject.\n"); 2035 sprintf(pkt_dev->result, 2036 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 2037 return; 2038 } 2039 2040 /* Default to the interface's mac if not explicitly set. */ 2041 2042 if (is_zero_ether_addr(pkt_dev->src_mac)) 2043 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN); 2044 2045 /* Set up Dest MAC */ 2046 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 2047 2048 /* Set up pkt size */ 2049 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2050 2051 if (pkt_dev->flags & F_IPV6) { 2052 /* 2053 * Skip this automatic address setting until locks or functions 2054 * gets exported 2055 */ 2056 2057 #ifdef NOTNOW 2058 int i, set = 0, err = 1; 2059 struct inet6_dev *idev; 2060 2061 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2062 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2063 set = 1; 2064 break; 2065 } 2066 2067 if (!set) { 2068 2069 /* 2070 * Use linklevel address if unconfigured. 2071 * 2072 * use ipv6_get_lladdr if/when it's get exported 2073 */ 2074 2075 rcu_read_lock(); 2076 if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) { 2077 struct inet6_ifaddr *ifp; 2078 2079 read_lock_bh(&idev->lock); 2080 for (ifp = idev->addr_list; ifp; 2081 ifp = ifp->if_next) { 2082 if (ifp->scope == IFA_LINK 2083 && !(ifp-> 2084 flags & IFA_F_TENTATIVE)) { 2085 ipv6_addr_copy(&pkt_dev-> 2086 cur_in6_saddr, 2087 &ifp->addr); 2088 err = 0; 2089 break; 2090 } 2091 } 2092 read_unlock_bh(&idev->lock); 2093 } 2094 rcu_read_unlock(); 2095 if (err) 2096 printk(KERN_ERR "pktgen: ERROR: IPv6 link " 2097 "address not availble.\n"); 2098 } 2099 #endif 2100 } else { 2101 pkt_dev->saddr_min = 0; 2102 pkt_dev->saddr_max = 0; 2103 if (strlen(pkt_dev->src_min) == 0) { 2104 2105 struct in_device *in_dev; 2106 2107 rcu_read_lock(); 2108 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2109 if (in_dev) { 2110 if (in_dev->ifa_list) { 2111 pkt_dev->saddr_min = 2112 in_dev->ifa_list->ifa_address; 2113 pkt_dev->saddr_max = pkt_dev->saddr_min; 2114 } 2115 } 2116 rcu_read_unlock(); 2117 } else { 2118 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2119 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2120 } 2121 2122 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2123 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2124 } 2125 /* Initialize current values. */ 2126 pkt_dev->cur_dst_mac_offset = 0; 2127 pkt_dev->cur_src_mac_offset = 0; 2128 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2129 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2130 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2131 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2132 pkt_dev->nflows = 0; 2133 } 2134 2135 static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us) 2136 { 2137 __u64 start; 2138 __u64 now; 2139 2140 start = now = getCurUs(); 2141 printk(KERN_INFO "sleeping for %d\n", (int)(spin_until_us - now)); 2142 while (now < spin_until_us) { 2143 /* TODO: optimize sleeping behavior */ 2144 if (spin_until_us - now > jiffies_to_usecs(1) + 1) 2145 schedule_timeout_interruptible(1); 2146 else if (spin_until_us - now > 100) { 2147 if (!pkt_dev->running) 2148 return; 2149 if (need_resched()) 2150 schedule(); 2151 } 2152 2153 now = getCurUs(); 2154 } 2155 2156 pkt_dev->idle_acc += now - start; 2157 } 2158 2159 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2160 { 2161 pkt_dev->pkt_overhead = 0; 2162 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2163 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2164 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2165 } 2166 2167 static inline int f_seen(struct pktgen_dev *pkt_dev, int flow) 2168 { 2169 2170 if (pkt_dev->flows[flow].flags & F_INIT) 2171 return 1; 2172 else 2173 return 0; 2174 } 2175 2176 static inline int f_pick(struct pktgen_dev *pkt_dev) 2177 { 2178 int flow = pkt_dev->curfl; 2179 2180 if (pkt_dev->flags & F_FLOW_SEQ) { 2181 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2182 /* reset time */ 2183 pkt_dev->flows[flow].count = 0; 2184 pkt_dev->curfl += 1; 2185 if (pkt_dev->curfl >= pkt_dev->cflows) 2186 pkt_dev->curfl = 0; /*reset */ 2187 } 2188 } else { 2189 flow = random32() % pkt_dev->cflows; 2190 2191 if (pkt_dev->flows[flow].count > pkt_dev->lflow) 2192 pkt_dev->flows[flow].count = 0; 2193 } 2194 2195 return pkt_dev->curfl; 2196 } 2197 2198 2199 #ifdef CONFIG_XFRM 2200 /* If there was already an IPSEC SA, we keep it as is, else 2201 * we go look for it ... 2202 */ 2203 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2204 { 2205 struct xfrm_state *x = pkt_dev->flows[flow].x; 2206 if (!x) { 2207 /*slow path: we dont already have xfrm_state*/ 2208 x = xfrm_stateonly_find((xfrm_address_t *)&pkt_dev->cur_daddr, 2209 (xfrm_address_t *)&pkt_dev->cur_saddr, 2210 AF_INET, 2211 pkt_dev->ipsmode, 2212 pkt_dev->ipsproto, 0); 2213 if (x) { 2214 pkt_dev->flows[flow].x = x; 2215 set_pkt_overhead(pkt_dev); 2216 pkt_dev->pkt_overhead+=x->props.header_len; 2217 } 2218 2219 } 2220 } 2221 #endif 2222 /* Increment/randomize headers according to flags and current values 2223 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2224 */ 2225 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2226 { 2227 __u32 imn; 2228 __u32 imx; 2229 int flow = 0; 2230 2231 if (pkt_dev->cflows) 2232 flow = f_pick(pkt_dev); 2233 2234 /* Deal with source MAC */ 2235 if (pkt_dev->src_mac_count > 1) { 2236 __u32 mc; 2237 __u32 tmp; 2238 2239 if (pkt_dev->flags & F_MACSRC_RND) 2240 mc = random32() % pkt_dev->src_mac_count; 2241 else { 2242 mc = pkt_dev->cur_src_mac_offset++; 2243 if (pkt_dev->cur_src_mac_offset > 2244 pkt_dev->src_mac_count) 2245 pkt_dev->cur_src_mac_offset = 0; 2246 } 2247 2248 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2249 pkt_dev->hh[11] = tmp; 2250 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2251 pkt_dev->hh[10] = tmp; 2252 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2253 pkt_dev->hh[9] = tmp; 2254 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2255 pkt_dev->hh[8] = tmp; 2256 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2257 pkt_dev->hh[7] = tmp; 2258 } 2259 2260 /* Deal with Destination MAC */ 2261 if (pkt_dev->dst_mac_count > 1) { 2262 __u32 mc; 2263 __u32 tmp; 2264 2265 if (pkt_dev->flags & F_MACDST_RND) 2266 mc = random32() % pkt_dev->dst_mac_count; 2267 2268 else { 2269 mc = pkt_dev->cur_dst_mac_offset++; 2270 if (pkt_dev->cur_dst_mac_offset > 2271 pkt_dev->dst_mac_count) { 2272 pkt_dev->cur_dst_mac_offset = 0; 2273 } 2274 } 2275 2276 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2277 pkt_dev->hh[5] = tmp; 2278 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2279 pkt_dev->hh[4] = tmp; 2280 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2281 pkt_dev->hh[3] = tmp; 2282 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2283 pkt_dev->hh[2] = tmp; 2284 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2285 pkt_dev->hh[1] = tmp; 2286 } 2287 2288 if (pkt_dev->flags & F_MPLS_RND) { 2289 unsigned i; 2290 for (i = 0; i < pkt_dev->nr_labels; i++) 2291 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2292 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2293 ((__force __be32)random32() & 2294 htonl(0x000fffff)); 2295 } 2296 2297 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2298 pkt_dev->vlan_id = random32() & (4096-1); 2299 } 2300 2301 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2302 pkt_dev->svlan_id = random32() & (4096 - 1); 2303 } 2304 2305 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2306 if (pkt_dev->flags & F_UDPSRC_RND) 2307 pkt_dev->cur_udp_src = random32() % 2308 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2309 + pkt_dev->udp_src_min; 2310 2311 else { 2312 pkt_dev->cur_udp_src++; 2313 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2314 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2315 } 2316 } 2317 2318 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2319 if (pkt_dev->flags & F_UDPDST_RND) { 2320 pkt_dev->cur_udp_dst = random32() % 2321 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2322 + pkt_dev->udp_dst_min; 2323 } else { 2324 pkt_dev->cur_udp_dst++; 2325 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2326 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2327 } 2328 } 2329 2330 if (!(pkt_dev->flags & F_IPV6)) { 2331 2332 if ((imn = ntohl(pkt_dev->saddr_min)) < (imx = 2333 ntohl(pkt_dev-> 2334 saddr_max))) { 2335 __u32 t; 2336 if (pkt_dev->flags & F_IPSRC_RND) 2337 t = random32() % (imx - imn) + imn; 2338 else { 2339 t = ntohl(pkt_dev->cur_saddr); 2340 t++; 2341 if (t > imx) { 2342 t = imn; 2343 } 2344 } 2345 pkt_dev->cur_saddr = htonl(t); 2346 } 2347 2348 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2349 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2350 } else { 2351 imn = ntohl(pkt_dev->daddr_min); 2352 imx = ntohl(pkt_dev->daddr_max); 2353 if (imn < imx) { 2354 __u32 t; 2355 __be32 s; 2356 if (pkt_dev->flags & F_IPDST_RND) { 2357 2358 t = random32() % (imx - imn) + imn; 2359 s = htonl(t); 2360 2361 while (LOOPBACK(s) || MULTICAST(s) 2362 || BADCLASS(s) || ZERONET(s) 2363 || LOCAL_MCAST(s)) { 2364 t = random32() % (imx - imn) + imn; 2365 s = htonl(t); 2366 } 2367 pkt_dev->cur_daddr = s; 2368 } else { 2369 t = ntohl(pkt_dev->cur_daddr); 2370 t++; 2371 if (t > imx) { 2372 t = imn; 2373 } 2374 pkt_dev->cur_daddr = htonl(t); 2375 } 2376 } 2377 if (pkt_dev->cflows) { 2378 pkt_dev->flows[flow].flags |= F_INIT; 2379 pkt_dev->flows[flow].cur_daddr = 2380 pkt_dev->cur_daddr; 2381 #ifdef CONFIG_XFRM 2382 if (pkt_dev->flags & F_IPSEC_ON) 2383 get_ipsec_sa(pkt_dev, flow); 2384 #endif 2385 pkt_dev->nflows++; 2386 } 2387 } 2388 } else { /* IPV6 * */ 2389 2390 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 && 2391 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 && 2392 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 && 2393 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ; 2394 else { 2395 int i; 2396 2397 /* Only random destinations yet */ 2398 2399 for (i = 0; i < 4; i++) { 2400 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2401 (((__force __be32)random32() | 2402 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2403 pkt_dev->max_in6_daddr.s6_addr32[i]); 2404 } 2405 } 2406 } 2407 2408 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2409 __u32 t; 2410 if (pkt_dev->flags & F_TXSIZE_RND) { 2411 t = random32() % 2412 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2413 + pkt_dev->min_pkt_size; 2414 } else { 2415 t = pkt_dev->cur_pkt_size + 1; 2416 if (t > pkt_dev->max_pkt_size) 2417 t = pkt_dev->min_pkt_size; 2418 } 2419 pkt_dev->cur_pkt_size = t; 2420 } 2421 2422 if (pkt_dev->queue_map_min < pkt_dev->queue_map_max) { 2423 __u16 t; 2424 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2425 t = random32() % 2426 (pkt_dev->queue_map_max - pkt_dev->queue_map_min + 1) 2427 + pkt_dev->queue_map_min; 2428 } else { 2429 t = pkt_dev->cur_queue_map + 1; 2430 if (t > pkt_dev->queue_map_max) 2431 t = pkt_dev->queue_map_min; 2432 } 2433 pkt_dev->cur_queue_map = t; 2434 } 2435 2436 pkt_dev->flows[flow].count++; 2437 } 2438 2439 2440 #ifdef CONFIG_XFRM 2441 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2442 { 2443 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2444 int err = 0; 2445 struct iphdr *iph; 2446 2447 if (!x) 2448 return 0; 2449 /* XXX: we dont support tunnel mode for now until 2450 * we resolve the dst issue */ 2451 if (x->props.mode != XFRM_MODE_TRANSPORT) 2452 return 0; 2453 2454 spin_lock(&x->lock); 2455 iph = ip_hdr(skb); 2456 2457 err = x->mode->output(x, skb); 2458 if (err) 2459 goto error; 2460 err = x->type->output(x, skb); 2461 if (err) 2462 goto error; 2463 2464 x->curlft.bytes +=skb->len; 2465 x->curlft.packets++; 2466 spin_unlock(&x->lock); 2467 2468 error: 2469 spin_unlock(&x->lock); 2470 return err; 2471 } 2472 2473 static inline void free_SAs(struct pktgen_dev *pkt_dev) 2474 { 2475 if (pkt_dev->cflows) { 2476 /* let go of the SAs if we have them */ 2477 int i = 0; 2478 for (; i < pkt_dev->nflows; i++){ 2479 struct xfrm_state *x = pkt_dev->flows[i].x; 2480 if (x) { 2481 xfrm_state_put(x); 2482 pkt_dev->flows[i].x = NULL; 2483 } 2484 } 2485 } 2486 } 2487 2488 static inline int process_ipsec(struct pktgen_dev *pkt_dev, 2489 struct sk_buff *skb, __be16 protocol) 2490 { 2491 if (pkt_dev->flags & F_IPSEC_ON) { 2492 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2493 int nhead = 0; 2494 if (x) { 2495 int ret; 2496 __u8 *eth; 2497 nhead = x->props.header_len - skb_headroom(skb); 2498 if (nhead >0) { 2499 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2500 if (ret < 0) { 2501 printk(KERN_ERR "Error expanding " 2502 "ipsec packet %d\n",ret); 2503 return 0; 2504 } 2505 } 2506 2507 /* ipsec is not expecting ll header */ 2508 skb_pull(skb, ETH_HLEN); 2509 ret = pktgen_output_ipsec(skb, pkt_dev); 2510 if (ret) { 2511 printk(KERN_ERR "Error creating ipsec " 2512 "packet %d\n",ret); 2513 kfree_skb(skb); 2514 return 0; 2515 } 2516 /* restore ll */ 2517 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2518 memcpy(eth, pkt_dev->hh, 12); 2519 *(u16 *) & eth[12] = protocol; 2520 } 2521 } 2522 return 1; 2523 } 2524 #endif 2525 2526 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2527 { 2528 unsigned i; 2529 for (i = 0; i < pkt_dev->nr_labels; i++) { 2530 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2531 } 2532 mpls--; 2533 *mpls |= MPLS_STACK_BOTTOM; 2534 } 2535 2536 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2537 unsigned int prio) 2538 { 2539 return htons(id | (cfi << 12) | (prio << 13)); 2540 } 2541 2542 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2543 struct pktgen_dev *pkt_dev) 2544 { 2545 struct sk_buff *skb = NULL; 2546 __u8 *eth; 2547 struct udphdr *udph; 2548 int datalen, iplen; 2549 struct iphdr *iph; 2550 struct pktgen_hdr *pgh = NULL; 2551 __be16 protocol = htons(ETH_P_IP); 2552 __be32 *mpls; 2553 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2554 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2555 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2556 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2557 2558 2559 if (pkt_dev->nr_labels) 2560 protocol = htons(ETH_P_MPLS_UC); 2561 2562 if (pkt_dev->vlan_id != 0xffff) 2563 protocol = htons(ETH_P_8021Q); 2564 2565 /* Update any of the values, used when we're incrementing various 2566 * fields. 2567 */ 2568 mod_cur_headers(pkt_dev); 2569 2570 datalen = (odev->hard_header_len + 16) & ~0xf; 2571 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + datalen + 2572 pkt_dev->pkt_overhead, GFP_ATOMIC); 2573 if (!skb) { 2574 sprintf(pkt_dev->result, "No memory"); 2575 return NULL; 2576 } 2577 2578 skb_reserve(skb, datalen); 2579 2580 /* Reserve for ethernet and IP header */ 2581 eth = (__u8 *) skb_push(skb, 14); 2582 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2583 if (pkt_dev->nr_labels) 2584 mpls_push(mpls, pkt_dev); 2585 2586 if (pkt_dev->vlan_id != 0xffff) { 2587 if (pkt_dev->svlan_id != 0xffff) { 2588 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2589 *svlan_tci = build_tci(pkt_dev->svlan_id, 2590 pkt_dev->svlan_cfi, 2591 pkt_dev->svlan_p); 2592 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2593 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2594 } 2595 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2596 *vlan_tci = build_tci(pkt_dev->vlan_id, 2597 pkt_dev->vlan_cfi, 2598 pkt_dev->vlan_p); 2599 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2600 *vlan_encapsulated_proto = htons(ETH_P_IP); 2601 } 2602 2603 skb->network_header = skb->tail; 2604 skb->transport_header = skb->network_header + sizeof(struct iphdr); 2605 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr)); 2606 skb->queue_mapping = pkt_dev->cur_queue_map; 2607 2608 iph = ip_hdr(skb); 2609 udph = udp_hdr(skb); 2610 2611 memcpy(eth, pkt_dev->hh, 12); 2612 *(__be16 *) & eth[12] = protocol; 2613 2614 /* Eth + IPh + UDPh + mpls */ 2615 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2616 pkt_dev->pkt_overhead; 2617 if (datalen < sizeof(struct pktgen_hdr)) 2618 datalen = sizeof(struct pktgen_hdr); 2619 2620 udph->source = htons(pkt_dev->cur_udp_src); 2621 udph->dest = htons(pkt_dev->cur_udp_dst); 2622 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2623 udph->check = 0; /* No checksum */ 2624 2625 iph->ihl = 5; 2626 iph->version = 4; 2627 iph->ttl = 32; 2628 iph->tos = pkt_dev->tos; 2629 iph->protocol = IPPROTO_UDP; /* UDP */ 2630 iph->saddr = pkt_dev->cur_saddr; 2631 iph->daddr = pkt_dev->cur_daddr; 2632 iph->frag_off = 0; 2633 iplen = 20 + 8 + datalen; 2634 iph->tot_len = htons(iplen); 2635 iph->check = 0; 2636 iph->check = ip_fast_csum((void *)iph, iph->ihl); 2637 skb->protocol = protocol; 2638 skb->mac_header = (skb->network_header - ETH_HLEN - 2639 pkt_dev->pkt_overhead); 2640 skb->dev = odev; 2641 skb->pkt_type = PACKET_HOST; 2642 2643 if (pkt_dev->nfrags <= 0) 2644 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 2645 else { 2646 int frags = pkt_dev->nfrags; 2647 int i; 2648 2649 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 2650 2651 if (frags > MAX_SKB_FRAGS) 2652 frags = MAX_SKB_FRAGS; 2653 if (datalen > frags * PAGE_SIZE) { 2654 skb_put(skb, datalen - frags * PAGE_SIZE); 2655 datalen = frags * PAGE_SIZE; 2656 } 2657 2658 i = 0; 2659 while (datalen > 0) { 2660 struct page *page = alloc_pages(GFP_KERNEL, 0); 2661 skb_shinfo(skb)->frags[i].page = page; 2662 skb_shinfo(skb)->frags[i].page_offset = 0; 2663 skb_shinfo(skb)->frags[i].size = 2664 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 2665 datalen -= skb_shinfo(skb)->frags[i].size; 2666 skb->len += skb_shinfo(skb)->frags[i].size; 2667 skb->data_len += skb_shinfo(skb)->frags[i].size; 2668 i++; 2669 skb_shinfo(skb)->nr_frags = i; 2670 } 2671 2672 while (i < frags) { 2673 int rem; 2674 2675 if (i == 0) 2676 break; 2677 2678 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 2679 if (rem == 0) 2680 break; 2681 2682 skb_shinfo(skb)->frags[i - 1].size -= rem; 2683 2684 skb_shinfo(skb)->frags[i] = 2685 skb_shinfo(skb)->frags[i - 1]; 2686 get_page(skb_shinfo(skb)->frags[i].page); 2687 skb_shinfo(skb)->frags[i].page = 2688 skb_shinfo(skb)->frags[i - 1].page; 2689 skb_shinfo(skb)->frags[i].page_offset += 2690 skb_shinfo(skb)->frags[i - 1].size; 2691 skb_shinfo(skb)->frags[i].size = rem; 2692 i++; 2693 skb_shinfo(skb)->nr_frags = i; 2694 } 2695 } 2696 2697 /* Stamp the time, and sequence number, convert them to network byte order */ 2698 2699 if (pgh) { 2700 struct timeval timestamp; 2701 2702 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2703 pgh->seq_num = htonl(pkt_dev->seq_num); 2704 2705 do_gettimeofday(×tamp); 2706 pgh->tv_sec = htonl(timestamp.tv_sec); 2707 pgh->tv_usec = htonl(timestamp.tv_usec); 2708 } 2709 2710 #ifdef CONFIG_XFRM 2711 if (!process_ipsec(pkt_dev, skb, protocol)) 2712 return NULL; 2713 #endif 2714 2715 return skb; 2716 } 2717 2718 /* 2719 * scan_ip6, fmt_ip taken from dietlibc-0.21 2720 * Author Felix von Leitner <felix-dietlibc@fefe.de> 2721 * 2722 * Slightly modified for kernel. 2723 * Should be candidate for net/ipv4/utils.c 2724 * --ro 2725 */ 2726 2727 static unsigned int scan_ip6(const char *s, char ip[16]) 2728 { 2729 unsigned int i; 2730 unsigned int len = 0; 2731 unsigned long u; 2732 char suffix[16]; 2733 unsigned int prefixlen = 0; 2734 unsigned int suffixlen = 0; 2735 __be32 tmp; 2736 char *pos; 2737 2738 for (i = 0; i < 16; i++) 2739 ip[i] = 0; 2740 2741 for (;;) { 2742 if (*s == ':') { 2743 len++; 2744 if (s[1] == ':') { /* Found "::", skip to part 2 */ 2745 s += 2; 2746 len++; 2747 break; 2748 } 2749 s++; 2750 } 2751 2752 u = simple_strtoul(s, &pos, 16); 2753 i = pos - s; 2754 if (!i) 2755 return 0; 2756 if (prefixlen == 12 && s[i] == '.') { 2757 2758 /* the last 4 bytes may be written as IPv4 address */ 2759 2760 tmp = in_aton(s); 2761 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp)); 2762 return i + len; 2763 } 2764 ip[prefixlen++] = (u >> 8); 2765 ip[prefixlen++] = (u & 255); 2766 s += i; 2767 len += i; 2768 if (prefixlen == 16) 2769 return len; 2770 } 2771 2772 /* part 2, after "::" */ 2773 for (;;) { 2774 if (*s == ':') { 2775 if (suffixlen == 0) 2776 break; 2777 s++; 2778 len++; 2779 } else if (suffixlen != 0) 2780 break; 2781 2782 u = simple_strtol(s, &pos, 16); 2783 i = pos - s; 2784 if (!i) { 2785 if (*s) 2786 len--; 2787 break; 2788 } 2789 if (suffixlen + prefixlen <= 12 && s[i] == '.') { 2790 tmp = in_aton(s); 2791 memcpy((struct in_addr *)(suffix + suffixlen), &tmp, 2792 sizeof(tmp)); 2793 suffixlen += 4; 2794 len += strlen(s); 2795 break; 2796 } 2797 suffix[suffixlen++] = (u >> 8); 2798 suffix[suffixlen++] = (u & 255); 2799 s += i; 2800 len += i; 2801 if (prefixlen + suffixlen == 16) 2802 break; 2803 } 2804 for (i = 0; i < suffixlen; i++) 2805 ip[16 - suffixlen + i] = suffix[i]; 2806 return len; 2807 } 2808 2809 static char tohex(char hexdigit) 2810 { 2811 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0'; 2812 } 2813 2814 static int fmt_xlong(char *s, unsigned int i) 2815 { 2816 char *bak = s; 2817 *s = tohex((i >> 12) & 0xf); 2818 if (s != bak || *s != '0') 2819 ++s; 2820 *s = tohex((i >> 8) & 0xf); 2821 if (s != bak || *s != '0') 2822 ++s; 2823 *s = tohex((i >> 4) & 0xf); 2824 if (s != bak || *s != '0') 2825 ++s; 2826 *s = tohex(i & 0xf); 2827 return s - bak + 1; 2828 } 2829 2830 static unsigned int fmt_ip6(char *s, const char ip[16]) 2831 { 2832 unsigned int len; 2833 unsigned int i; 2834 unsigned int temp; 2835 unsigned int compressing; 2836 int j; 2837 2838 len = 0; 2839 compressing = 0; 2840 for (j = 0; j < 16; j += 2) { 2841 2842 #ifdef V4MAPPEDPREFIX 2843 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) { 2844 inet_ntoa_r(*(struct in_addr *)(ip + 12), s); 2845 temp = strlen(s); 2846 return len + temp; 2847 } 2848 #endif 2849 temp = ((unsigned long)(unsigned char)ip[j] << 8) + 2850 (unsigned long)(unsigned char)ip[j + 1]; 2851 if (temp == 0) { 2852 if (!compressing) { 2853 compressing = 1; 2854 if (j == 0) { 2855 *s++ = ':'; 2856 ++len; 2857 } 2858 } 2859 } else { 2860 if (compressing) { 2861 compressing = 0; 2862 *s++ = ':'; 2863 ++len; 2864 } 2865 i = fmt_xlong(s, temp); 2866 len += i; 2867 s += i; 2868 if (j < 14) { 2869 *s++ = ':'; 2870 ++len; 2871 } 2872 } 2873 } 2874 if (compressing) { 2875 *s++ = ':'; 2876 ++len; 2877 } 2878 *s = 0; 2879 return len; 2880 } 2881 2882 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2883 struct pktgen_dev *pkt_dev) 2884 { 2885 struct sk_buff *skb = NULL; 2886 __u8 *eth; 2887 struct udphdr *udph; 2888 int datalen; 2889 struct ipv6hdr *iph; 2890 struct pktgen_hdr *pgh = NULL; 2891 __be16 protocol = htons(ETH_P_IPV6); 2892 __be32 *mpls; 2893 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2894 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2895 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2896 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2897 2898 if (pkt_dev->nr_labels) 2899 protocol = htons(ETH_P_MPLS_UC); 2900 2901 if (pkt_dev->vlan_id != 0xffff) 2902 protocol = htons(ETH_P_8021Q); 2903 2904 /* Update any of the values, used when we're incrementing various 2905 * fields. 2906 */ 2907 mod_cur_headers(pkt_dev); 2908 2909 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16 + 2910 pkt_dev->pkt_overhead, GFP_ATOMIC); 2911 if (!skb) { 2912 sprintf(pkt_dev->result, "No memory"); 2913 return NULL; 2914 } 2915 2916 skb_reserve(skb, 16); 2917 2918 /* Reserve for ethernet and IP header */ 2919 eth = (__u8 *) skb_push(skb, 14); 2920 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2921 if (pkt_dev->nr_labels) 2922 mpls_push(mpls, pkt_dev); 2923 2924 if (pkt_dev->vlan_id != 0xffff) { 2925 if (pkt_dev->svlan_id != 0xffff) { 2926 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2927 *svlan_tci = build_tci(pkt_dev->svlan_id, 2928 pkt_dev->svlan_cfi, 2929 pkt_dev->svlan_p); 2930 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2931 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2932 } 2933 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2934 *vlan_tci = build_tci(pkt_dev->vlan_id, 2935 pkt_dev->vlan_cfi, 2936 pkt_dev->vlan_p); 2937 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2938 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 2939 } 2940 2941 skb->network_header = skb->tail; 2942 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr); 2943 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr)); 2944 skb->queue_mapping = pkt_dev->cur_queue_map; 2945 2946 iph = ipv6_hdr(skb); 2947 udph = udp_hdr(skb); 2948 2949 memcpy(eth, pkt_dev->hh, 12); 2950 *(__be16 *) & eth[12] = protocol; 2951 2952 /* Eth + IPh + UDPh + mpls */ 2953 datalen = pkt_dev->cur_pkt_size - 14 - 2954 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 2955 pkt_dev->pkt_overhead; 2956 2957 if (datalen < sizeof(struct pktgen_hdr)) { 2958 datalen = sizeof(struct pktgen_hdr); 2959 if (net_ratelimit()) 2960 printk(KERN_INFO "pktgen: increased datalen to %d\n", 2961 datalen); 2962 } 2963 2964 udph->source = htons(pkt_dev->cur_udp_src); 2965 udph->dest = htons(pkt_dev->cur_udp_dst); 2966 udph->len = htons(datalen + sizeof(struct udphdr)); 2967 udph->check = 0; /* No checksum */ 2968 2969 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 2970 2971 if (pkt_dev->traffic_class) { 2972 /* Version + traffic class + flow (0) */ 2973 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 2974 } 2975 2976 iph->hop_limit = 32; 2977 2978 iph->payload_len = htons(sizeof(struct udphdr) + datalen); 2979 iph->nexthdr = IPPROTO_UDP; 2980 2981 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr); 2982 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr); 2983 2984 skb->mac_header = (skb->network_header - ETH_HLEN - 2985 pkt_dev->pkt_overhead); 2986 skb->protocol = protocol; 2987 skb->dev = odev; 2988 skb->pkt_type = PACKET_HOST; 2989 2990 if (pkt_dev->nfrags <= 0) 2991 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 2992 else { 2993 int frags = pkt_dev->nfrags; 2994 int i; 2995 2996 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 2997 2998 if (frags > MAX_SKB_FRAGS) 2999 frags = MAX_SKB_FRAGS; 3000 if (datalen > frags * PAGE_SIZE) { 3001 skb_put(skb, datalen - frags * PAGE_SIZE); 3002 datalen = frags * PAGE_SIZE; 3003 } 3004 3005 i = 0; 3006 while (datalen > 0) { 3007 struct page *page = alloc_pages(GFP_KERNEL, 0); 3008 skb_shinfo(skb)->frags[i].page = page; 3009 skb_shinfo(skb)->frags[i].page_offset = 0; 3010 skb_shinfo(skb)->frags[i].size = 3011 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 3012 datalen -= skb_shinfo(skb)->frags[i].size; 3013 skb->len += skb_shinfo(skb)->frags[i].size; 3014 skb->data_len += skb_shinfo(skb)->frags[i].size; 3015 i++; 3016 skb_shinfo(skb)->nr_frags = i; 3017 } 3018 3019 while (i < frags) { 3020 int rem; 3021 3022 if (i == 0) 3023 break; 3024 3025 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 3026 if (rem == 0) 3027 break; 3028 3029 skb_shinfo(skb)->frags[i - 1].size -= rem; 3030 3031 skb_shinfo(skb)->frags[i] = 3032 skb_shinfo(skb)->frags[i - 1]; 3033 get_page(skb_shinfo(skb)->frags[i].page); 3034 skb_shinfo(skb)->frags[i].page = 3035 skb_shinfo(skb)->frags[i - 1].page; 3036 skb_shinfo(skb)->frags[i].page_offset += 3037 skb_shinfo(skb)->frags[i - 1].size; 3038 skb_shinfo(skb)->frags[i].size = rem; 3039 i++; 3040 skb_shinfo(skb)->nr_frags = i; 3041 } 3042 } 3043 3044 /* Stamp the time, and sequence number, convert them to network byte order */ 3045 /* should we update cloned packets too ? */ 3046 if (pgh) { 3047 struct timeval timestamp; 3048 3049 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 3050 pgh->seq_num = htonl(pkt_dev->seq_num); 3051 3052 do_gettimeofday(×tamp); 3053 pgh->tv_sec = htonl(timestamp.tv_sec); 3054 pgh->tv_usec = htonl(timestamp.tv_usec); 3055 } 3056 /* pkt_dev->seq_num++; FF: you really mean this? */ 3057 3058 return skb; 3059 } 3060 3061 static inline struct sk_buff *fill_packet(struct net_device *odev, 3062 struct pktgen_dev *pkt_dev) 3063 { 3064 if (pkt_dev->flags & F_IPV6) 3065 return fill_packet_ipv6(odev, pkt_dev); 3066 else 3067 return fill_packet_ipv4(odev, pkt_dev); 3068 } 3069 3070 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 3071 { 3072 pkt_dev->seq_num = 1; 3073 pkt_dev->idle_acc = 0; 3074 pkt_dev->sofar = 0; 3075 pkt_dev->tx_bytes = 0; 3076 pkt_dev->errors = 0; 3077 } 3078 3079 /* Set up structure for sending pkts, clear counters */ 3080 3081 static void pktgen_run(struct pktgen_thread *t) 3082 { 3083 struct pktgen_dev *pkt_dev; 3084 int started = 0; 3085 3086 pr_debug("pktgen: entering pktgen_run. %p\n", t); 3087 3088 if_lock(t); 3089 list_for_each_entry(pkt_dev, &t->if_list, list) { 3090 3091 /* 3092 * setup odev and create initial packet. 3093 */ 3094 pktgen_setup_inject(pkt_dev); 3095 3096 if (pkt_dev->odev) { 3097 pktgen_clear_counters(pkt_dev); 3098 pkt_dev->running = 1; /* Cranke yeself! */ 3099 pkt_dev->skb = NULL; 3100 pkt_dev->started_at = getCurUs(); 3101 pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */ 3102 pkt_dev->next_tx_ns = 0; 3103 set_pkt_overhead(pkt_dev); 3104 3105 strcpy(pkt_dev->result, "Starting"); 3106 started++; 3107 } else 3108 strcpy(pkt_dev->result, "Error starting"); 3109 } 3110 if_unlock(t); 3111 if (started) 3112 t->control &= ~(T_STOP); 3113 } 3114 3115 static void pktgen_stop_all_threads_ifs(void) 3116 { 3117 struct pktgen_thread *t; 3118 3119 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n"); 3120 3121 mutex_lock(&pktgen_thread_lock); 3122 3123 list_for_each_entry(t, &pktgen_threads, th_list) 3124 t->control |= T_STOP; 3125 3126 mutex_unlock(&pktgen_thread_lock); 3127 } 3128 3129 static int thread_is_running(struct pktgen_thread *t) 3130 { 3131 struct pktgen_dev *pkt_dev; 3132 int res = 0; 3133 3134 list_for_each_entry(pkt_dev, &t->if_list, list) 3135 if (pkt_dev->running) { 3136 res = 1; 3137 break; 3138 } 3139 return res; 3140 } 3141 3142 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3143 { 3144 if_lock(t); 3145 3146 while (thread_is_running(t)) { 3147 3148 if_unlock(t); 3149 3150 msleep_interruptible(100); 3151 3152 if (signal_pending(current)) 3153 goto signal; 3154 if_lock(t); 3155 } 3156 if_unlock(t); 3157 return 1; 3158 signal: 3159 return 0; 3160 } 3161 3162 static int pktgen_wait_all_threads_run(void) 3163 { 3164 struct pktgen_thread *t; 3165 int sig = 1; 3166 3167 mutex_lock(&pktgen_thread_lock); 3168 3169 list_for_each_entry(t, &pktgen_threads, th_list) { 3170 sig = pktgen_wait_thread_run(t); 3171 if (sig == 0) 3172 break; 3173 } 3174 3175 if (sig == 0) 3176 list_for_each_entry(t, &pktgen_threads, th_list) 3177 t->control |= (T_STOP); 3178 3179 mutex_unlock(&pktgen_thread_lock); 3180 return sig; 3181 } 3182 3183 static void pktgen_run_all_threads(void) 3184 { 3185 struct pktgen_thread *t; 3186 3187 pr_debug("pktgen: entering pktgen_run_all_threads.\n"); 3188 3189 mutex_lock(&pktgen_thread_lock); 3190 3191 list_for_each_entry(t, &pktgen_threads, th_list) 3192 t->control |= (T_RUN); 3193 3194 mutex_unlock(&pktgen_thread_lock); 3195 3196 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 3197 3198 pktgen_wait_all_threads_run(); 3199 } 3200 3201 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3202 { 3203 __u64 total_us, bps, mbps, pps, idle; 3204 char *p = pkt_dev->result; 3205 3206 total_us = pkt_dev->stopped_at - pkt_dev->started_at; 3207 3208 idle = pkt_dev->idle_acc; 3209 3210 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", 3211 (unsigned long long)total_us, 3212 (unsigned long long)(total_us - idle), 3213 (unsigned long long)idle, 3214 (unsigned long long)pkt_dev->sofar, 3215 pkt_dev->cur_pkt_size, nr_frags); 3216 3217 pps = pkt_dev->sofar * USEC_PER_SEC; 3218 3219 while ((total_us >> 32) != 0) { 3220 pps >>= 1; 3221 total_us >>= 1; 3222 } 3223 3224 do_div(pps, total_us); 3225 3226 bps = pps * 8 * pkt_dev->cur_pkt_size; 3227 3228 mbps = bps; 3229 do_div(mbps, 1000000); 3230 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3231 (unsigned long long)pps, 3232 (unsigned long long)mbps, 3233 (unsigned long long)bps, 3234 (unsigned long long)pkt_dev->errors); 3235 } 3236 3237 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3238 3239 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3240 { 3241 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3242 3243 if (!pkt_dev->running) { 3244 printk(KERN_WARNING "pktgen: interface: %s is already " 3245 "stopped\n", pkt_dev->odev->name); 3246 return -EINVAL; 3247 } 3248 3249 pkt_dev->stopped_at = getCurUs(); 3250 pkt_dev->running = 0; 3251 3252 show_results(pkt_dev, nr_frags); 3253 3254 return 0; 3255 } 3256 3257 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3258 { 3259 struct pktgen_dev *pkt_dev, *best = NULL; 3260 3261 if_lock(t); 3262 3263 list_for_each_entry(pkt_dev, &t->if_list, list) { 3264 if (!pkt_dev->running) 3265 continue; 3266 if (best == NULL) 3267 best = pkt_dev; 3268 else if (pkt_dev->next_tx_us < best->next_tx_us) 3269 best = pkt_dev; 3270 } 3271 if_unlock(t); 3272 return best; 3273 } 3274 3275 static void pktgen_stop(struct pktgen_thread *t) 3276 { 3277 struct pktgen_dev *pkt_dev; 3278 3279 pr_debug("pktgen: entering pktgen_stop\n"); 3280 3281 if_lock(t); 3282 3283 list_for_each_entry(pkt_dev, &t->if_list, list) { 3284 pktgen_stop_device(pkt_dev); 3285 if (pkt_dev->skb) 3286 kfree_skb(pkt_dev->skb); 3287 3288 pkt_dev->skb = NULL; 3289 } 3290 3291 if_unlock(t); 3292 } 3293 3294 /* 3295 * one of our devices needs to be removed - find it 3296 * and remove it 3297 */ 3298 static void pktgen_rem_one_if(struct pktgen_thread *t) 3299 { 3300 struct list_head *q, *n; 3301 struct pktgen_dev *cur; 3302 3303 pr_debug("pktgen: entering pktgen_rem_one_if\n"); 3304 3305 if_lock(t); 3306 3307 list_for_each_safe(q, n, &t->if_list) { 3308 cur = list_entry(q, struct pktgen_dev, list); 3309 3310 if (!cur->removal_mark) 3311 continue; 3312 3313 if (cur->skb) 3314 kfree_skb(cur->skb); 3315 cur->skb = NULL; 3316 3317 pktgen_remove_device(t, cur); 3318 3319 break; 3320 } 3321 3322 if_unlock(t); 3323 } 3324 3325 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3326 { 3327 struct list_head *q, *n; 3328 struct pktgen_dev *cur; 3329 3330 /* Remove all devices, free mem */ 3331 3332 pr_debug("pktgen: entering pktgen_rem_all_ifs\n"); 3333 if_lock(t); 3334 3335 list_for_each_safe(q, n, &t->if_list) { 3336 cur = list_entry(q, struct pktgen_dev, list); 3337 3338 if (cur->skb) 3339 kfree_skb(cur->skb); 3340 cur->skb = NULL; 3341 3342 pktgen_remove_device(t, cur); 3343 } 3344 3345 if_unlock(t); 3346 } 3347 3348 static void pktgen_rem_thread(struct pktgen_thread *t) 3349 { 3350 /* Remove from the thread list */ 3351 3352 remove_proc_entry(t->tsk->comm, pg_proc_dir); 3353 3354 mutex_lock(&pktgen_thread_lock); 3355 3356 list_del(&t->th_list); 3357 3358 mutex_unlock(&pktgen_thread_lock); 3359 } 3360 3361 static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev) 3362 { 3363 struct net_device *odev = NULL; 3364 __u64 idle_start = 0; 3365 int ret; 3366 3367 odev = pkt_dev->odev; 3368 3369 if (pkt_dev->delay_us || pkt_dev->delay_ns) { 3370 u64 now; 3371 3372 now = getCurUs(); 3373 if (now < pkt_dev->next_tx_us) 3374 spin(pkt_dev, pkt_dev->next_tx_us); 3375 3376 /* This is max DELAY, this has special meaning of 3377 * "never transmit" 3378 */ 3379 if (pkt_dev->delay_us == 0x7FFFFFFF) { 3380 pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us; 3381 pkt_dev->next_tx_ns = pkt_dev->delay_ns; 3382 goto out; 3383 } 3384 } 3385 3386 if ((netif_queue_stopped(odev) || 3387 (pkt_dev->skb && 3388 netif_subqueue_stopped(odev, pkt_dev->skb->queue_mapping))) || 3389 need_resched()) { 3390 idle_start = getCurUs(); 3391 3392 if (!netif_running(odev)) { 3393 pktgen_stop_device(pkt_dev); 3394 if (pkt_dev->skb) 3395 kfree_skb(pkt_dev->skb); 3396 pkt_dev->skb = NULL; 3397 goto out; 3398 } 3399 if (need_resched()) 3400 schedule(); 3401 3402 pkt_dev->idle_acc += getCurUs() - idle_start; 3403 3404 if (netif_queue_stopped(odev) || 3405 netif_subqueue_stopped(odev, pkt_dev->skb->queue_mapping)) { 3406 pkt_dev->next_tx_us = getCurUs(); /* TODO */ 3407 pkt_dev->next_tx_ns = 0; 3408 goto out; /* Try the next interface */ 3409 } 3410 } 3411 3412 if (pkt_dev->last_ok || !pkt_dev->skb) { 3413 if ((++pkt_dev->clone_count >= pkt_dev->clone_skb) 3414 || (!pkt_dev->skb)) { 3415 /* build a new pkt */ 3416 if (pkt_dev->skb) 3417 kfree_skb(pkt_dev->skb); 3418 3419 pkt_dev->skb = fill_packet(odev, pkt_dev); 3420 if (pkt_dev->skb == NULL) { 3421 printk(KERN_ERR "pktgen: ERROR: couldn't " 3422 "allocate skb in fill_packet.\n"); 3423 schedule(); 3424 pkt_dev->clone_count--; /* back out increment, OOM */ 3425 goto out; 3426 } 3427 pkt_dev->allocated_skbs++; 3428 pkt_dev->clone_count = 0; /* reset counter */ 3429 } 3430 } 3431 3432 netif_tx_lock_bh(odev); 3433 if (!netif_queue_stopped(odev) && 3434 !netif_subqueue_stopped(odev, pkt_dev->skb->queue_mapping)) { 3435 3436 atomic_inc(&(pkt_dev->skb->users)); 3437 retry_now: 3438 ret = odev->hard_start_xmit(pkt_dev->skb, odev); 3439 if (likely(ret == NETDEV_TX_OK)) { 3440 pkt_dev->last_ok = 1; 3441 pkt_dev->sofar++; 3442 pkt_dev->seq_num++; 3443 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size; 3444 3445 } else if (ret == NETDEV_TX_LOCKED 3446 && (odev->features & NETIF_F_LLTX)) { 3447 cpu_relax(); 3448 goto retry_now; 3449 } else { /* Retry it next time */ 3450 3451 atomic_dec(&(pkt_dev->skb->users)); 3452 3453 if (debug && net_ratelimit()) 3454 printk(KERN_INFO "pktgen: Hard xmit error\n"); 3455 3456 pkt_dev->errors++; 3457 pkt_dev->last_ok = 0; 3458 } 3459 3460 pkt_dev->next_tx_us = getCurUs(); 3461 pkt_dev->next_tx_ns = 0; 3462 3463 pkt_dev->next_tx_us += pkt_dev->delay_us; 3464 pkt_dev->next_tx_ns += pkt_dev->delay_ns; 3465 3466 if (pkt_dev->next_tx_ns > 1000) { 3467 pkt_dev->next_tx_us++; 3468 pkt_dev->next_tx_ns -= 1000; 3469 } 3470 } 3471 3472 else { /* Retry it next time */ 3473 pkt_dev->last_ok = 0; 3474 pkt_dev->next_tx_us = getCurUs(); /* TODO */ 3475 pkt_dev->next_tx_ns = 0; 3476 } 3477 3478 netif_tx_unlock_bh(odev); 3479 3480 /* If pkt_dev->count is zero, then run forever */ 3481 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3482 if (atomic_read(&(pkt_dev->skb->users)) != 1) { 3483 idle_start = getCurUs(); 3484 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3485 if (signal_pending(current)) { 3486 break; 3487 } 3488 schedule(); 3489 } 3490 pkt_dev->idle_acc += getCurUs() - idle_start; 3491 } 3492 3493 /* Done with this */ 3494 pktgen_stop_device(pkt_dev); 3495 if (pkt_dev->skb) 3496 kfree_skb(pkt_dev->skb); 3497 pkt_dev->skb = NULL; 3498 } 3499 out:; 3500 } 3501 3502 /* 3503 * Main loop of the thread goes here 3504 */ 3505 3506 static int pktgen_thread_worker(void *arg) 3507 { 3508 DEFINE_WAIT(wait); 3509 struct pktgen_thread *t = arg; 3510 struct pktgen_dev *pkt_dev = NULL; 3511 int cpu = t->cpu; 3512 3513 BUG_ON(smp_processor_id() != cpu); 3514 3515 init_waitqueue_head(&t->queue); 3516 3517 pr_debug("pktgen: starting pktgen/%d: pid=%d\n", cpu, current->pid); 3518 3519 set_current_state(TASK_INTERRUPTIBLE); 3520 3521 set_freezable(); 3522 3523 while (!kthread_should_stop()) { 3524 pkt_dev = next_to_run(t); 3525 3526 if (!pkt_dev && 3527 (t->control & (T_STOP | T_RUN | T_REMDEVALL | T_REMDEV)) 3528 == 0) { 3529 prepare_to_wait(&(t->queue), &wait, 3530 TASK_INTERRUPTIBLE); 3531 schedule_timeout(HZ / 10); 3532 finish_wait(&(t->queue), &wait); 3533 } 3534 3535 __set_current_state(TASK_RUNNING); 3536 3537 if (pkt_dev) 3538 pktgen_xmit(pkt_dev); 3539 3540 if (t->control & T_STOP) { 3541 pktgen_stop(t); 3542 t->control &= ~(T_STOP); 3543 } 3544 3545 if (t->control & T_RUN) { 3546 pktgen_run(t); 3547 t->control &= ~(T_RUN); 3548 } 3549 3550 if (t->control & T_REMDEVALL) { 3551 pktgen_rem_all_ifs(t); 3552 t->control &= ~(T_REMDEVALL); 3553 } 3554 3555 if (t->control & T_REMDEV) { 3556 pktgen_rem_one_if(t); 3557 t->control &= ~(T_REMDEV); 3558 } 3559 3560 try_to_freeze(); 3561 3562 set_current_state(TASK_INTERRUPTIBLE); 3563 } 3564 3565 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm); 3566 pktgen_stop(t); 3567 3568 pr_debug("pktgen: %s removing all device\n", t->tsk->comm); 3569 pktgen_rem_all_ifs(t); 3570 3571 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm); 3572 pktgen_rem_thread(t); 3573 3574 return 0; 3575 } 3576 3577 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3578 const char *ifname) 3579 { 3580 struct pktgen_dev *p, *pkt_dev = NULL; 3581 if_lock(t); 3582 3583 list_for_each_entry(p, &t->if_list, list) 3584 if (strncmp(p->odev->name, ifname, IFNAMSIZ) == 0) { 3585 pkt_dev = p; 3586 break; 3587 } 3588 3589 if_unlock(t); 3590 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev); 3591 return pkt_dev; 3592 } 3593 3594 /* 3595 * Adds a dev at front of if_list. 3596 */ 3597 3598 static int add_dev_to_thread(struct pktgen_thread *t, 3599 struct pktgen_dev *pkt_dev) 3600 { 3601 int rv = 0; 3602 3603 if_lock(t); 3604 3605 if (pkt_dev->pg_thread) { 3606 printk(KERN_ERR "pktgen: ERROR: already assigned " 3607 "to a thread.\n"); 3608 rv = -EBUSY; 3609 goto out; 3610 } 3611 3612 list_add(&pkt_dev->list, &t->if_list); 3613 pkt_dev->pg_thread = t; 3614 pkt_dev->running = 0; 3615 3616 out: 3617 if_unlock(t); 3618 return rv; 3619 } 3620 3621 /* Called under thread lock */ 3622 3623 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3624 { 3625 struct pktgen_dev *pkt_dev; 3626 int err; 3627 3628 /* We don't allow a device to be on several threads */ 3629 3630 pkt_dev = __pktgen_NN_threads(ifname, FIND); 3631 if (pkt_dev) { 3632 printk(KERN_ERR "pktgen: ERROR: interface already used.\n"); 3633 return -EBUSY; 3634 } 3635 3636 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL); 3637 if (!pkt_dev) 3638 return -ENOMEM; 3639 3640 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state)); 3641 if (pkt_dev->flows == NULL) { 3642 kfree(pkt_dev); 3643 return -ENOMEM; 3644 } 3645 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state)); 3646 3647 pkt_dev->removal_mark = 0; 3648 pkt_dev->min_pkt_size = ETH_ZLEN; 3649 pkt_dev->max_pkt_size = ETH_ZLEN; 3650 pkt_dev->nfrags = 0; 3651 pkt_dev->clone_skb = pg_clone_skb_d; 3652 pkt_dev->delay_us = pg_delay_d / 1000; 3653 pkt_dev->delay_ns = pg_delay_d % 1000; 3654 pkt_dev->count = pg_count_d; 3655 pkt_dev->sofar = 0; 3656 pkt_dev->udp_src_min = 9; /* sink port */ 3657 pkt_dev->udp_src_max = 9; 3658 pkt_dev->udp_dst_min = 9; 3659 pkt_dev->udp_dst_max = 9; 3660 3661 pkt_dev->vlan_p = 0; 3662 pkt_dev->vlan_cfi = 0; 3663 pkt_dev->vlan_id = 0xffff; 3664 pkt_dev->svlan_p = 0; 3665 pkt_dev->svlan_cfi = 0; 3666 pkt_dev->svlan_id = 0xffff; 3667 3668 err = pktgen_setup_dev(pkt_dev, ifname); 3669 if (err) 3670 goto out1; 3671 3672 pkt_dev->entry = create_proc_entry(ifname, 0600, pg_proc_dir); 3673 if (!pkt_dev->entry) { 3674 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n", 3675 PG_PROC_DIR, ifname); 3676 err = -EINVAL; 3677 goto out2; 3678 } 3679 pkt_dev->entry->proc_fops = &pktgen_if_fops; 3680 pkt_dev->entry->data = pkt_dev; 3681 #ifdef CONFIG_XFRM 3682 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3683 pkt_dev->ipsproto = IPPROTO_ESP; 3684 #endif 3685 3686 return add_dev_to_thread(t, pkt_dev); 3687 out2: 3688 dev_put(pkt_dev->odev); 3689 out1: 3690 #ifdef CONFIG_XFRM 3691 free_SAs(pkt_dev); 3692 #endif 3693 if (pkt_dev->flows) 3694 vfree(pkt_dev->flows); 3695 kfree(pkt_dev); 3696 return err; 3697 } 3698 3699 static int __init pktgen_create_thread(int cpu) 3700 { 3701 struct pktgen_thread *t; 3702 struct proc_dir_entry *pe; 3703 struct task_struct *p; 3704 3705 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL); 3706 if (!t) { 3707 printk(KERN_ERR "pktgen: ERROR: out of memory, can't " 3708 "create new thread.\n"); 3709 return -ENOMEM; 3710 } 3711 3712 spin_lock_init(&t->if_lock); 3713 t->cpu = cpu; 3714 3715 INIT_LIST_HEAD(&t->if_list); 3716 3717 list_add_tail(&t->th_list, &pktgen_threads); 3718 3719 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu); 3720 if (IS_ERR(p)) { 3721 printk(KERN_ERR "pktgen: kernel_thread() failed " 3722 "for cpu %d\n", t->cpu); 3723 list_del(&t->th_list); 3724 kfree(t); 3725 return PTR_ERR(p); 3726 } 3727 kthread_bind(p, cpu); 3728 t->tsk = p; 3729 3730 pe = create_proc_entry(t->tsk->comm, 0600, pg_proc_dir); 3731 if (!pe) { 3732 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n", 3733 PG_PROC_DIR, t->tsk->comm); 3734 kthread_stop(p); 3735 list_del(&t->th_list); 3736 kfree(t); 3737 return -EINVAL; 3738 } 3739 3740 pe->proc_fops = &pktgen_thread_fops; 3741 pe->data = t; 3742 3743 wake_up_process(p); 3744 3745 return 0; 3746 } 3747 3748 /* 3749 * Removes a device from the thread if_list. 3750 */ 3751 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3752 struct pktgen_dev *pkt_dev) 3753 { 3754 struct list_head *q, *n; 3755 struct pktgen_dev *p; 3756 3757 list_for_each_safe(q, n, &t->if_list) { 3758 p = list_entry(q, struct pktgen_dev, list); 3759 if (p == pkt_dev) 3760 list_del(&p->list); 3761 } 3762 } 3763 3764 static int pktgen_remove_device(struct pktgen_thread *t, 3765 struct pktgen_dev *pkt_dev) 3766 { 3767 3768 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev); 3769 3770 if (pkt_dev->running) { 3771 printk(KERN_WARNING "pktgen: WARNING: trying to remove a " 3772 "running interface, stopping it now.\n"); 3773 pktgen_stop_device(pkt_dev); 3774 } 3775 3776 /* Dis-associate from the interface */ 3777 3778 if (pkt_dev->odev) { 3779 dev_put(pkt_dev->odev); 3780 pkt_dev->odev = NULL; 3781 } 3782 3783 /* And update the thread if_list */ 3784 3785 _rem_dev_from_if_list(t, pkt_dev); 3786 3787 if (pkt_dev->entry) 3788 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 3789 3790 #ifdef CONFIG_XFRM 3791 free_SAs(pkt_dev); 3792 #endif 3793 if (pkt_dev->flows) 3794 vfree(pkt_dev->flows); 3795 kfree(pkt_dev); 3796 return 0; 3797 } 3798 3799 static int __init pg_init(void) 3800 { 3801 int cpu; 3802 struct proc_dir_entry *pe; 3803 3804 printk(KERN_INFO "%s", version); 3805 3806 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net); 3807 if (!pg_proc_dir) 3808 return -ENODEV; 3809 pg_proc_dir->owner = THIS_MODULE; 3810 3811 pe = create_proc_entry(PGCTRL, 0600, pg_proc_dir); 3812 if (pe == NULL) { 3813 printk(KERN_ERR "pktgen: ERROR: cannot create %s " 3814 "procfs entry.\n", PGCTRL); 3815 proc_net_remove(&init_net, PG_PROC_DIR); 3816 return -EINVAL; 3817 } 3818 3819 pe->proc_fops = &pktgen_fops; 3820 pe->data = NULL; 3821 3822 /* Register us to receive netdevice events */ 3823 register_netdevice_notifier(&pktgen_notifier_block); 3824 3825 for_each_online_cpu(cpu) { 3826 int err; 3827 3828 err = pktgen_create_thread(cpu); 3829 if (err) 3830 printk(KERN_WARNING "pktgen: WARNING: Cannot create " 3831 "thread for cpu %d (%d)\n", cpu, err); 3832 } 3833 3834 if (list_empty(&pktgen_threads)) { 3835 printk(KERN_ERR "pktgen: ERROR: Initialization failed for " 3836 "all threads\n"); 3837 unregister_netdevice_notifier(&pktgen_notifier_block); 3838 remove_proc_entry(PGCTRL, pg_proc_dir); 3839 proc_net_remove(&init_net, PG_PROC_DIR); 3840 return -ENODEV; 3841 } 3842 3843 return 0; 3844 } 3845 3846 static void __exit pg_cleanup(void) 3847 { 3848 struct pktgen_thread *t; 3849 struct list_head *q, *n; 3850 wait_queue_head_t queue; 3851 init_waitqueue_head(&queue); 3852 3853 /* Stop all interfaces & threads */ 3854 3855 list_for_each_safe(q, n, &pktgen_threads) { 3856 t = list_entry(q, struct pktgen_thread, th_list); 3857 kthread_stop(t->tsk); 3858 kfree(t); 3859 } 3860 3861 /* Un-register us from receiving netdevice events */ 3862 unregister_netdevice_notifier(&pktgen_notifier_block); 3863 3864 /* Clean up proc file system */ 3865 remove_proc_entry(PGCTRL, pg_proc_dir); 3866 proc_net_remove(&init_net, PG_PROC_DIR); 3867 } 3868 3869 module_init(pg_init); 3870 module_exit(pg_cleanup); 3871 3872 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se"); 3873 MODULE_DESCRIPTION("Packet Generator tool"); 3874 MODULE_LICENSE("GPL"); 3875 module_param(pg_count_d, int, 0); 3876 module_param(pg_delay_d, int, 0); 3877 module_param(pg_clone_skb_d, int, 0); 3878 module_param(debug, int, 0); 3879