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 pratical 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 * Rany 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 #include <linux/sys.h> 111 #include <linux/types.h> 112 #include <linux/module.h> 113 #include <linux/moduleparam.h> 114 #include <linux/kernel.h> 115 #include <linux/smp_lock.h> 116 #include <linux/sched.h> 117 #include <linux/slab.h> 118 #include <linux/vmalloc.h> 119 #include <linux/sched.h> 120 #include <linux/unistd.h> 121 #include <linux/string.h> 122 #include <linux/ptrace.h> 123 #include <linux/errno.h> 124 #include <linux/ioport.h> 125 #include <linux/interrupt.h> 126 #include <linux/delay.h> 127 #include <linux/timer.h> 128 #include <linux/init.h> 129 #include <linux/skbuff.h> 130 #include <linux/netdevice.h> 131 #include <linux/inet.h> 132 #include <linux/inetdevice.h> 133 #include <linux/rtnetlink.h> 134 #include <linux/if_arp.h> 135 #include <linux/in.h> 136 #include <linux/ip.h> 137 #include <linux/ipv6.h> 138 #include <linux/udp.h> 139 #include <linux/proc_fs.h> 140 #include <linux/wait.h> 141 #include <net/checksum.h> 142 #include <net/ipv6.h> 143 #include <net/addrconf.h> 144 #include <asm/byteorder.h> 145 #include <linux/rcupdate.h> 146 #include <asm/bitops.h> 147 #include <asm/io.h> 148 #include <asm/dma.h> 149 #include <asm/uaccess.h> 150 #include <asm/div64.h> /* do_div */ 151 #include <asm/timex.h> 152 153 154 #define VERSION "pktgen v2.62: Packet Generator for packet performance testing.\n" 155 156 /* #define PG_DEBUG(a) a */ 157 #define PG_DEBUG(a) 158 159 /* The buckets are exponential in 'width' */ 160 #define LAT_BUCKETS_MAX 32 161 #define IP_NAME_SZ 32 162 163 /* Device flag bits */ 164 #define F_IPSRC_RND (1<<0) /* IP-Src Random */ 165 #define F_IPDST_RND (1<<1) /* IP-Dst Random */ 166 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */ 167 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */ 168 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */ 169 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */ 170 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */ 171 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */ 172 173 /* Thread control flag bits */ 174 #define T_TERMINATE (1<<0) 175 #define T_STOP (1<<1) /* Stop run */ 176 #define T_RUN (1<<2) /* Start run */ 177 #define T_REMDEV (1<<3) /* Remove all devs */ 178 179 /* Locks */ 180 #define thread_lock() down(&pktgen_sem) 181 #define thread_unlock() up(&pktgen_sem) 182 183 /* If lock -- can be removed after some work */ 184 #define if_lock(t) spin_lock(&(t->if_lock)); 185 #define if_unlock(t) spin_unlock(&(t->if_lock)); 186 187 /* Used to help with determining the pkts on receive */ 188 #define PKTGEN_MAGIC 0xbe9be955 189 #define PG_PROC_DIR "net/pktgen" 190 191 #define MAX_CFLOWS 65536 192 193 struct flow_state 194 { 195 __u32 cur_daddr; 196 int count; 197 }; 198 199 struct pktgen_dev { 200 201 /* 202 * Try to keep frequent/infrequent used vars. separated. 203 */ 204 205 char ifname[32]; 206 struct proc_dir_entry *proc_ent; 207 char result[512]; 208 /* proc file names */ 209 char fname[80]; 210 211 struct pktgen_thread* pg_thread; /* the owner */ 212 struct pktgen_dev *next; /* Used for chaining in the thread's run-queue */ 213 214 int running; /* if this changes to false, the test will stop */ 215 216 /* If min != max, then we will either do a linear iteration, or 217 * we will do a random selection from within the range. 218 */ 219 __u32 flags; 220 221 int min_pkt_size; /* = ETH_ZLEN; */ 222 int max_pkt_size; /* = ETH_ZLEN; */ 223 int nfrags; 224 __u32 delay_us; /* Default delay */ 225 __u32 delay_ns; 226 __u64 count; /* Default No packets to send */ 227 __u64 sofar; /* How many pkts we've sent so far */ 228 __u64 tx_bytes; /* How many bytes we've transmitted */ 229 __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */ 230 231 /* runtime counters relating to clone_skb */ 232 __u64 next_tx_us; /* timestamp of when to tx next */ 233 __u32 next_tx_ns; 234 235 __u64 allocated_skbs; 236 __u32 clone_count; 237 int last_ok; /* Was last skb sent? 238 * Or a failed transmit of some sort? This will keep 239 * sequence numbers in order, for example. 240 */ 241 __u64 started_at; /* micro-seconds */ 242 __u64 stopped_at; /* micro-seconds */ 243 __u64 idle_acc; /* micro-seconds */ 244 __u32 seq_num; 245 246 int clone_skb; /* Use multiple SKBs during packet gen. If this number 247 * is greater than 1, then that many coppies of the same 248 * packet will be sent before a new packet is allocated. 249 * For instance, if you want to send 1024 identical packets 250 * before creating a new packet, set clone_skb to 1024. 251 */ 252 253 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 254 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 255 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 256 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 257 258 struct in6_addr in6_saddr; 259 struct in6_addr in6_daddr; 260 struct in6_addr cur_in6_daddr; 261 struct in6_addr cur_in6_saddr; 262 /* For ranges */ 263 struct in6_addr min_in6_daddr; 264 struct in6_addr max_in6_daddr; 265 struct in6_addr min_in6_saddr; 266 struct in6_addr max_in6_saddr; 267 268 /* If we're doing ranges, random or incremental, then this 269 * defines the min/max for those ranges. 270 */ 271 __u32 saddr_min; /* inclusive, source IP address */ 272 __u32 saddr_max; /* exclusive, source IP address */ 273 __u32 daddr_min; /* inclusive, dest IP address */ 274 __u32 daddr_max; /* exclusive, dest IP address */ 275 276 __u16 udp_src_min; /* inclusive, source UDP port */ 277 __u16 udp_src_max; /* exclusive, source UDP port */ 278 __u16 udp_dst_min; /* inclusive, dest UDP port */ 279 __u16 udp_dst_max; /* exclusive, dest UDP port */ 280 281 __u32 src_mac_count; /* How many MACs to iterate through */ 282 __u32 dst_mac_count; /* How many MACs to iterate through */ 283 284 unsigned char dst_mac[6]; 285 unsigned char src_mac[6]; 286 287 __u32 cur_dst_mac_offset; 288 __u32 cur_src_mac_offset; 289 __u32 cur_saddr; 290 __u32 cur_daddr; 291 __u16 cur_udp_dst; 292 __u16 cur_udp_src; 293 __u32 cur_pkt_size; 294 295 __u8 hh[14]; 296 /* = { 297 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, 298 299 We fill in SRC address later 300 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 301 0x08, 0x00 302 }; 303 */ 304 __u16 pad; /* pad out the hh struct to an even 16 bytes */ 305 306 struct sk_buff* skb; /* skb we are to transmit next, mainly used for when we 307 * are transmitting the same one multiple times 308 */ 309 struct net_device* odev; /* The out-going device. Note that the device should 310 * have it's pg_info pointer pointing back to this 311 * device. This will be set when the user specifies 312 * the out-going device name (not when the inject is 313 * started as it used to do.) 314 */ 315 struct flow_state *flows; 316 unsigned cflows; /* Concurrent flows (config) */ 317 unsigned lflow; /* Flow length (config) */ 318 unsigned nflows; /* accumulated flows (stats) */ 319 }; 320 321 struct pktgen_hdr { 322 __u32 pgh_magic; 323 __u32 seq_num; 324 __u32 tv_sec; 325 __u32 tv_usec; 326 }; 327 328 struct pktgen_thread { 329 spinlock_t if_lock; 330 struct pktgen_dev *if_list; /* All device here */ 331 struct pktgen_thread* next; 332 char name[32]; 333 char fname[128]; /* name of proc file */ 334 struct proc_dir_entry *proc_ent; 335 char result[512]; 336 u32 max_before_softirq; /* We'll call do_softirq to prevent starvation. */ 337 338 /* Field for thread to receive "posted" events terminate, stop ifs etc.*/ 339 340 u32 control; 341 int pid; 342 int cpu; 343 344 wait_queue_head_t queue; 345 }; 346 347 #define REMOVE 1 348 #define FIND 0 349 350 /* This code works around the fact that do_div cannot handle two 64-bit 351 numbers, and regular 64-bit division doesn't work on x86 kernels. 352 --Ben 353 */ 354 355 #define PG_DIV 0 356 357 /* This was emailed to LMKL by: Chris Caputo <ccaputo@alt.net> 358 * Function copied/adapted/optimized from: 359 * 360 * nemesis.sourceforge.net/browse/lib/static/intmath/ix86/intmath.c.html 361 * 362 * Copyright 1994, University of Cambridge Computer Laboratory 363 * All Rights Reserved. 364 * 365 */ 366 static inline s64 divremdi3(s64 x, s64 y, int type) 367 { 368 u64 a = (x < 0) ? -x : x; 369 u64 b = (y < 0) ? -y : y; 370 u64 res = 0, d = 1; 371 372 if (b > 0) { 373 while (b < a) { 374 b <<= 1; 375 d <<= 1; 376 } 377 } 378 379 do { 380 if ( a >= b ) { 381 a -= b; 382 res += d; 383 } 384 b >>= 1; 385 d >>= 1; 386 } 387 while (d); 388 389 if (PG_DIV == type) { 390 return (((x ^ y) & (1ll<<63)) == 0) ? res : -(s64)res; 391 } 392 else { 393 return ((x & (1ll<<63)) == 0) ? a : -(s64)a; 394 } 395 } 396 397 /* End of hacks to deal with 64-bit math on x86 */ 398 399 /** Convert to miliseconds */ 400 static inline __u64 tv_to_ms(const struct timeval* tv) 401 { 402 __u64 ms = tv->tv_usec / 1000; 403 ms += (__u64)tv->tv_sec * (__u64)1000; 404 return ms; 405 } 406 407 408 /** Convert to micro-seconds */ 409 static inline __u64 tv_to_us(const struct timeval* tv) 410 { 411 __u64 us = tv->tv_usec; 412 us += (__u64)tv->tv_sec * (__u64)1000000; 413 return us; 414 } 415 416 static inline __u64 pg_div(__u64 n, __u32 base) { 417 __u64 tmp = n; 418 do_div(tmp, base); 419 /* printk("pktgen: pg_div, n: %llu base: %d rv: %llu\n", 420 n, base, tmp); */ 421 return tmp; 422 } 423 424 static inline __u64 pg_div64(__u64 n, __u64 base) 425 { 426 __u64 tmp = n; 427 /* 428 * How do we know if the architectrure we are running on 429 * supports division with 64 bit base? 430 * 431 */ 432 #if defined(__sparc_v9__) || defined(__powerpc64__) || defined(__alpha__) || defined(__x86_64__) || defined(__ia64__) 433 434 do_div(tmp, base); 435 #else 436 tmp = divremdi3(n, base, PG_DIV); 437 #endif 438 return tmp; 439 } 440 441 static inline u32 pktgen_random(void) 442 { 443 #if 0 444 __u32 n; 445 get_random_bytes(&n, 4); 446 return n; 447 #else 448 return net_random(); 449 #endif 450 } 451 452 static inline __u64 getCurMs(void) 453 { 454 struct timeval tv; 455 do_gettimeofday(&tv); 456 return tv_to_ms(&tv); 457 } 458 459 static inline __u64 getCurUs(void) 460 { 461 struct timeval tv; 462 do_gettimeofday(&tv); 463 return tv_to_us(&tv); 464 } 465 466 static inline __u64 tv_diff(const struct timeval* a, const struct timeval* b) 467 { 468 return tv_to_us(a) - tv_to_us(b); 469 } 470 471 472 /* old include end */ 473 474 static char version[] __initdata = VERSION; 475 476 static ssize_t proc_pgctrl_read(struct file* file, char __user * buf, size_t count, loff_t *ppos); 477 static ssize_t proc_pgctrl_write(struct file* file, const char __user * buf, size_t count, loff_t *ppos); 478 static int proc_if_read(char *buf , char **start, off_t offset, int len, int *eof, void *data); 479 480 static int proc_thread_read(char *buf , char **start, off_t offset, int len, int *eof, void *data); 481 static int proc_if_write(struct file *file, const char __user *user_buffer, unsigned long count, void *data); 482 static int proc_thread_write(struct file *file, const char __user *user_buffer, unsigned long count, void *data); 483 static int create_proc_dir(void); 484 static int remove_proc_dir(void); 485 486 static int pktgen_remove_device(struct pktgen_thread* t, struct pktgen_dev *i); 487 static int pktgen_add_device(struct pktgen_thread* t, const char* ifname); 488 static struct pktgen_thread* pktgen_find_thread(const char* name); 489 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread* t, const char* ifname); 490 static int pktgen_device_event(struct notifier_block *, unsigned long, void *); 491 static void pktgen_run_all_threads(void); 492 static void pktgen_stop_all_threads_ifs(void); 493 static int pktgen_stop_device(struct pktgen_dev *pkt_dev); 494 static void pktgen_stop(struct pktgen_thread* t); 495 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); 496 static struct pktgen_dev *pktgen_NN_threads(const char* dev_name, int remove); 497 static unsigned int scan_ip6(const char *s,char ip[16]); 498 static unsigned int fmt_ip6(char *s,const char ip[16]); 499 500 /* Module parameters, defaults. */ 501 static int pg_count_d = 1000; /* 1000 pkts by default */ 502 static int pg_delay_d = 0; 503 static int pg_clone_skb_d = 0; 504 static int debug = 0; 505 506 static DECLARE_MUTEX(pktgen_sem); 507 static struct pktgen_thread *pktgen_threads = NULL; 508 509 static char module_fname[128]; 510 static struct proc_dir_entry *module_proc_ent = NULL; 511 512 static struct notifier_block pktgen_notifier_block = { 513 .notifier_call = pktgen_device_event, 514 }; 515 516 static struct file_operations pktgen_fops = { 517 .read = proc_pgctrl_read, 518 .write = proc_pgctrl_write, 519 /* .ioctl = pktgen_ioctl, later maybe */ 520 }; 521 522 /* 523 * /proc handling functions 524 * 525 */ 526 527 static struct proc_dir_entry *pg_proc_dir = NULL; 528 static int proc_pgctrl_read_eof=0; 529 530 static ssize_t proc_pgctrl_read(struct file* file, char __user * buf, 531 size_t count, loff_t *ppos) 532 { 533 char data[200]; 534 int len = 0; 535 536 if(proc_pgctrl_read_eof) { 537 proc_pgctrl_read_eof=0; 538 len = 0; 539 goto out; 540 } 541 542 sprintf(data, "%s", VERSION); 543 544 len = strlen(data); 545 546 if(len > count) { 547 len =-EFAULT; 548 goto out; 549 } 550 551 if (copy_to_user(buf, data, len)) { 552 len =-EFAULT; 553 goto out; 554 } 555 556 *ppos += len; 557 proc_pgctrl_read_eof=1; /* EOF next call */ 558 559 out: 560 return len; 561 } 562 563 static ssize_t proc_pgctrl_write(struct file* file,const char __user * buf, 564 size_t count, loff_t *ppos) 565 { 566 char *data = NULL; 567 int err = 0; 568 569 if (!capable(CAP_NET_ADMIN)){ 570 err = -EPERM; 571 goto out; 572 } 573 574 data = (void*)vmalloc ((unsigned int)count); 575 576 if(!data) { 577 err = -ENOMEM; 578 goto out; 579 } 580 if (copy_from_user(data, buf, count)) { 581 err =-EFAULT; 582 goto out_free; 583 } 584 data[count-1] = 0; /* Make string */ 585 586 if (!strcmp(data, "stop")) 587 pktgen_stop_all_threads_ifs(); 588 589 else if (!strcmp(data, "start")) 590 pktgen_run_all_threads(); 591 592 else 593 printk("pktgen: Unknown command: %s\n", data); 594 595 err = count; 596 597 out_free: 598 vfree (data); 599 out: 600 return err; 601 } 602 603 static int proc_if_read(char *buf , char **start, off_t offset, 604 int len, int *eof, void *data) 605 { 606 char *p; 607 int i; 608 struct pktgen_dev *pkt_dev = (struct pktgen_dev*)(data); 609 __u64 sa; 610 __u64 stopped; 611 __u64 now = getCurUs(); 612 613 p = buf; 614 p += sprintf(p, "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", 615 (unsigned long long) pkt_dev->count, 616 pkt_dev->min_pkt_size, pkt_dev->max_pkt_size); 617 618 p += sprintf(p, " frags: %d delay: %u clone_skb: %d ifname: %s\n", 619 pkt_dev->nfrags, 1000*pkt_dev->delay_us+pkt_dev->delay_ns, pkt_dev->clone_skb, pkt_dev->ifname); 620 621 p += sprintf(p, " flows: %u flowlen: %u\n", pkt_dev->cflows, pkt_dev->lflow); 622 623 624 if(pkt_dev->flags & F_IPV6) { 625 char b1[128], b2[128], b3[128]; 626 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr); 627 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr); 628 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr); 629 p += sprintf(p, " saddr: %s min_saddr: %s max_saddr: %s\n", b1, b2, b3); 630 631 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr); 632 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr); 633 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr); 634 p += sprintf(p, " daddr: %s min_daddr: %s max_daddr: %s\n", b1, b2, b3); 635 636 } 637 else 638 p += sprintf(p, " dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n", 639 pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min, pkt_dev->src_max); 640 641 p += sprintf(p, " src_mac: "); 642 643 if ((pkt_dev->src_mac[0] == 0) && 644 (pkt_dev->src_mac[1] == 0) && 645 (pkt_dev->src_mac[2] == 0) && 646 (pkt_dev->src_mac[3] == 0) && 647 (pkt_dev->src_mac[4] == 0) && 648 (pkt_dev->src_mac[5] == 0)) 649 650 for (i = 0; i < 6; i++) 651 p += sprintf(p, "%02X%s", pkt_dev->odev->dev_addr[i], i == 5 ? " " : ":"); 652 653 else 654 for (i = 0; i < 6; i++) 655 p += sprintf(p, "%02X%s", pkt_dev->src_mac[i], i == 5 ? " " : ":"); 656 657 p += sprintf(p, "dst_mac: "); 658 for (i = 0; i < 6; i++) 659 p += sprintf(p, "%02X%s", pkt_dev->dst_mac[i], i == 5 ? "\n" : ":"); 660 661 p += sprintf(p, " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n", 662 pkt_dev->udp_src_min, pkt_dev->udp_src_max, pkt_dev->udp_dst_min, 663 pkt_dev->udp_dst_max); 664 665 p += sprintf(p, " src_mac_count: %d dst_mac_count: %d \n Flags: ", 666 pkt_dev->src_mac_count, pkt_dev->dst_mac_count); 667 668 669 if (pkt_dev->flags & F_IPV6) 670 p += sprintf(p, "IPV6 "); 671 672 if (pkt_dev->flags & F_IPSRC_RND) 673 p += sprintf(p, "IPSRC_RND "); 674 675 if (pkt_dev->flags & F_IPDST_RND) 676 p += sprintf(p, "IPDST_RND "); 677 678 if (pkt_dev->flags & F_TXSIZE_RND) 679 p += sprintf(p, "TXSIZE_RND "); 680 681 if (pkt_dev->flags & F_UDPSRC_RND) 682 p += sprintf(p, "UDPSRC_RND "); 683 684 if (pkt_dev->flags & F_UDPDST_RND) 685 p += sprintf(p, "UDPDST_RND "); 686 687 if (pkt_dev->flags & F_MACSRC_RND) 688 p += sprintf(p, "MACSRC_RND "); 689 690 if (pkt_dev->flags & F_MACDST_RND) 691 p += sprintf(p, "MACDST_RND "); 692 693 694 p += sprintf(p, "\n"); 695 696 sa = pkt_dev->started_at; 697 stopped = pkt_dev->stopped_at; 698 if (pkt_dev->running) 699 stopped = now; /* not really stopped, more like last-running-at */ 700 701 p += sprintf(p, "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n", 702 (unsigned long long) pkt_dev->sofar, 703 (unsigned long long) pkt_dev->errors, 704 (unsigned long long) sa, 705 (unsigned long long) stopped, 706 (unsigned long long) pkt_dev->idle_acc); 707 708 p += sprintf(p, " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 709 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, pkt_dev->cur_src_mac_offset); 710 711 if(pkt_dev->flags & F_IPV6) { 712 char b1[128], b2[128]; 713 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr); 714 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr); 715 p += sprintf(p, " cur_saddr: %s cur_daddr: %s\n", b2, b1); 716 } 717 else 718 p += sprintf(p, " cur_saddr: 0x%x cur_daddr: 0x%x\n", 719 pkt_dev->cur_saddr, pkt_dev->cur_daddr); 720 721 722 p += sprintf(p, " cur_udp_dst: %d cur_udp_src: %d\n", 723 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 724 725 p += sprintf(p, " flows: %u\n", pkt_dev->nflows); 726 727 if (pkt_dev->result[0]) 728 p += sprintf(p, "Result: %s\n", pkt_dev->result); 729 else 730 p += sprintf(p, "Result: Idle\n"); 731 *eof = 1; 732 733 return p - buf; 734 } 735 736 737 static int count_trail_chars(const char __user *user_buffer, unsigned int maxlen) 738 { 739 int i; 740 741 for (i = 0; i < maxlen; i++) { 742 char c; 743 if (get_user(c, &user_buffer[i])) 744 return -EFAULT; 745 switch (c) { 746 case '\"': 747 case '\n': 748 case '\r': 749 case '\t': 750 case ' ': 751 case '=': 752 break; 753 default: 754 goto done; 755 }; 756 } 757 done: 758 return i; 759 } 760 761 static unsigned long num_arg(const char __user *user_buffer, unsigned long maxlen, 762 unsigned long *num) 763 { 764 int i = 0; 765 *num = 0; 766 767 for(; i < maxlen; i++) { 768 char c; 769 if (get_user(c, &user_buffer[i])) 770 return -EFAULT; 771 if ((c >= '0') && (c <= '9')) { 772 *num *= 10; 773 *num += c -'0'; 774 } else 775 break; 776 } 777 return i; 778 } 779 780 static int strn_len(const char __user *user_buffer, unsigned int maxlen) 781 { 782 int i = 0; 783 784 for(; i < maxlen; i++) { 785 char c; 786 if (get_user(c, &user_buffer[i])) 787 return -EFAULT; 788 switch (c) { 789 case '\"': 790 case '\n': 791 case '\r': 792 case '\t': 793 case ' ': 794 goto done_str; 795 break; 796 default: 797 break; 798 }; 799 } 800 done_str: 801 802 return i; 803 } 804 805 static int proc_if_write(struct file *file, const char __user *user_buffer, 806 unsigned long count, void *data) 807 { 808 int i = 0, max, len; 809 char name[16], valstr[32]; 810 unsigned long value = 0; 811 struct pktgen_dev *pkt_dev = (struct pktgen_dev*)(data); 812 char* pg_result = NULL; 813 int tmp = 0; 814 char buf[128]; 815 816 pg_result = &(pkt_dev->result[0]); 817 818 if (count < 1) { 819 printk("pktgen: wrong command format\n"); 820 return -EINVAL; 821 } 822 823 max = count - i; 824 tmp = count_trail_chars(&user_buffer[i], max); 825 if (tmp < 0) { 826 printk("pktgen: illegal format\n"); 827 return tmp; 828 } 829 i += tmp; 830 831 /* Read variable name */ 832 833 len = strn_len(&user_buffer[i], sizeof(name) - 1); 834 if (len < 0) { return len; } 835 memset(name, 0, sizeof(name)); 836 if (copy_from_user(name, &user_buffer[i], len) ) 837 return -EFAULT; 838 i += len; 839 840 max = count -i; 841 len = count_trail_chars(&user_buffer[i], max); 842 if (len < 0) 843 return len; 844 845 i += len; 846 847 if (debug) { 848 char tb[count + 1]; 849 if (copy_from_user(tb, user_buffer, count)) 850 return -EFAULT; 851 tb[count] = 0; 852 printk("pktgen: %s,%lu buffer -:%s:-\n", name, count, tb); 853 } 854 855 if (!strcmp(name, "min_pkt_size")) { 856 len = num_arg(&user_buffer[i], 10, &value); 857 if (len < 0) { return len; } 858 i += len; 859 if (value < 14+20+8) 860 value = 14+20+8; 861 if (value != pkt_dev->min_pkt_size) { 862 pkt_dev->min_pkt_size = value; 863 pkt_dev->cur_pkt_size = value; 864 } 865 sprintf(pg_result, "OK: min_pkt_size=%u", pkt_dev->min_pkt_size); 866 return count; 867 } 868 869 if (!strcmp(name, "max_pkt_size")) { 870 len = num_arg(&user_buffer[i], 10, &value); 871 if (len < 0) { return len; } 872 i += len; 873 if (value < 14+20+8) 874 value = 14+20+8; 875 if (value != pkt_dev->max_pkt_size) { 876 pkt_dev->max_pkt_size = value; 877 pkt_dev->cur_pkt_size = value; 878 } 879 sprintf(pg_result, "OK: max_pkt_size=%u", pkt_dev->max_pkt_size); 880 return count; 881 } 882 883 /* Shortcut for min = max */ 884 885 if (!strcmp(name, "pkt_size")) { 886 len = num_arg(&user_buffer[i], 10, &value); 887 if (len < 0) { return len; } 888 i += len; 889 if (value < 14+20+8) 890 value = 14+20+8; 891 if (value != pkt_dev->min_pkt_size) { 892 pkt_dev->min_pkt_size = value; 893 pkt_dev->max_pkt_size = value; 894 pkt_dev->cur_pkt_size = value; 895 } 896 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 897 return count; 898 } 899 900 if (!strcmp(name, "debug")) { 901 len = num_arg(&user_buffer[i], 10, &value); 902 if (len < 0) { return len; } 903 i += len; 904 debug = value; 905 sprintf(pg_result, "OK: debug=%u", debug); 906 return count; 907 } 908 909 if (!strcmp(name, "frags")) { 910 len = num_arg(&user_buffer[i], 10, &value); 911 if (len < 0) { return len; } 912 i += len; 913 pkt_dev->nfrags = value; 914 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 915 return count; 916 } 917 if (!strcmp(name, "delay")) { 918 len = num_arg(&user_buffer[i], 10, &value); 919 if (len < 0) { return len; } 920 i += len; 921 if (value == 0x7FFFFFFF) { 922 pkt_dev->delay_us = 0x7FFFFFFF; 923 pkt_dev->delay_ns = 0; 924 } else { 925 pkt_dev->delay_us = value / 1000; 926 pkt_dev->delay_ns = value % 1000; 927 } 928 sprintf(pg_result, "OK: delay=%u", 1000*pkt_dev->delay_us+pkt_dev->delay_ns); 929 return count; 930 } 931 if (!strcmp(name, "udp_src_min")) { 932 len = num_arg(&user_buffer[i], 10, &value); 933 if (len < 0) { return len; } 934 i += len; 935 if (value != pkt_dev->udp_src_min) { 936 pkt_dev->udp_src_min = value; 937 pkt_dev->cur_udp_src = value; 938 } 939 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 940 return count; 941 } 942 if (!strcmp(name, "udp_dst_min")) { 943 len = num_arg(&user_buffer[i], 10, &value); 944 if (len < 0) { return len; } 945 i += len; 946 if (value != pkt_dev->udp_dst_min) { 947 pkt_dev->udp_dst_min = value; 948 pkt_dev->cur_udp_dst = value; 949 } 950 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 951 return count; 952 } 953 if (!strcmp(name, "udp_src_max")) { 954 len = num_arg(&user_buffer[i], 10, &value); 955 if (len < 0) { return len; } 956 i += len; 957 if (value != pkt_dev->udp_src_max) { 958 pkt_dev->udp_src_max = value; 959 pkt_dev->cur_udp_src = value; 960 } 961 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 962 return count; 963 } 964 if (!strcmp(name, "udp_dst_max")) { 965 len = num_arg(&user_buffer[i], 10, &value); 966 if (len < 0) { return len; } 967 i += len; 968 if (value != pkt_dev->udp_dst_max) { 969 pkt_dev->udp_dst_max = value; 970 pkt_dev->cur_udp_dst = value; 971 } 972 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 973 return count; 974 } 975 if (!strcmp(name, "clone_skb")) { 976 len = num_arg(&user_buffer[i], 10, &value); 977 if (len < 0) { return len; } 978 i += len; 979 pkt_dev->clone_skb = value; 980 981 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 982 return count; 983 } 984 if (!strcmp(name, "count")) { 985 len = num_arg(&user_buffer[i], 10, &value); 986 if (len < 0) { return len; } 987 i += len; 988 pkt_dev->count = value; 989 sprintf(pg_result, "OK: count=%llu", 990 (unsigned long long) pkt_dev->count); 991 return count; 992 } 993 if (!strcmp(name, "src_mac_count")) { 994 len = num_arg(&user_buffer[i], 10, &value); 995 if (len < 0) { return len; } 996 i += len; 997 if (pkt_dev->src_mac_count != value) { 998 pkt_dev->src_mac_count = value; 999 pkt_dev->cur_src_mac_offset = 0; 1000 } 1001 sprintf(pg_result, "OK: src_mac_count=%d", pkt_dev->src_mac_count); 1002 return count; 1003 } 1004 if (!strcmp(name, "dst_mac_count")) { 1005 len = num_arg(&user_buffer[i], 10, &value); 1006 if (len < 0) { return len; } 1007 i += len; 1008 if (pkt_dev->dst_mac_count != value) { 1009 pkt_dev->dst_mac_count = value; 1010 pkt_dev->cur_dst_mac_offset = 0; 1011 } 1012 sprintf(pg_result, "OK: dst_mac_count=%d", pkt_dev->dst_mac_count); 1013 return count; 1014 } 1015 if (!strcmp(name, "flag")) { 1016 char f[32]; 1017 memset(f, 0, 32); 1018 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1019 if (len < 0) { return len; } 1020 if (copy_from_user(f, &user_buffer[i], len)) 1021 return -EFAULT; 1022 i += len; 1023 if (strcmp(f, "IPSRC_RND") == 0) 1024 pkt_dev->flags |= F_IPSRC_RND; 1025 1026 else if (strcmp(f, "!IPSRC_RND") == 0) 1027 pkt_dev->flags &= ~F_IPSRC_RND; 1028 1029 else if (strcmp(f, "TXSIZE_RND") == 0) 1030 pkt_dev->flags |= F_TXSIZE_RND; 1031 1032 else if (strcmp(f, "!TXSIZE_RND") == 0) 1033 pkt_dev->flags &= ~F_TXSIZE_RND; 1034 1035 else if (strcmp(f, "IPDST_RND") == 0) 1036 pkt_dev->flags |= F_IPDST_RND; 1037 1038 else if (strcmp(f, "!IPDST_RND") == 0) 1039 pkt_dev->flags &= ~F_IPDST_RND; 1040 1041 else if (strcmp(f, "UDPSRC_RND") == 0) 1042 pkt_dev->flags |= F_UDPSRC_RND; 1043 1044 else if (strcmp(f, "!UDPSRC_RND") == 0) 1045 pkt_dev->flags &= ~F_UDPSRC_RND; 1046 1047 else if (strcmp(f, "UDPDST_RND") == 0) 1048 pkt_dev->flags |= F_UDPDST_RND; 1049 1050 else if (strcmp(f, "!UDPDST_RND") == 0) 1051 pkt_dev->flags &= ~F_UDPDST_RND; 1052 1053 else if (strcmp(f, "MACSRC_RND") == 0) 1054 pkt_dev->flags |= F_MACSRC_RND; 1055 1056 else if (strcmp(f, "!MACSRC_RND") == 0) 1057 pkt_dev->flags &= ~F_MACSRC_RND; 1058 1059 else if (strcmp(f, "MACDST_RND") == 0) 1060 pkt_dev->flags |= F_MACDST_RND; 1061 1062 else if (strcmp(f, "!MACDST_RND") == 0) 1063 pkt_dev->flags &= ~F_MACDST_RND; 1064 1065 else { 1066 sprintf(pg_result, "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1067 f, 1068 "IPSRC_RND, IPDST_RND, TXSIZE_RND, UDPSRC_RND, UDPDST_RND, MACSRC_RND, MACDST_RND\n"); 1069 return count; 1070 } 1071 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1072 return count; 1073 } 1074 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1075 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1076 if (len < 0) { return len; } 1077 1078 if (copy_from_user(buf, &user_buffer[i], len)) 1079 return -EFAULT; 1080 buf[len] = 0; 1081 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1082 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1083 strncpy(pkt_dev->dst_min, buf, len); 1084 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1085 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1086 } 1087 if(debug) 1088 printk("pktgen: dst_min set to: %s\n", pkt_dev->dst_min); 1089 i += len; 1090 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1091 return count; 1092 } 1093 if (!strcmp(name, "dst_max")) { 1094 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1095 if (len < 0) { return len; } 1096 1097 if (copy_from_user(buf, &user_buffer[i], len)) 1098 return -EFAULT; 1099 1100 buf[len] = 0; 1101 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1102 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1103 strncpy(pkt_dev->dst_max, buf, len); 1104 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1105 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1106 } 1107 if(debug) 1108 printk("pktgen: dst_max set to: %s\n", pkt_dev->dst_max); 1109 i += len; 1110 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1111 return count; 1112 } 1113 if (!strcmp(name, "dst6")) { 1114 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1115 if (len < 0) return len; 1116 1117 pkt_dev->flags |= F_IPV6; 1118 1119 if (copy_from_user(buf, &user_buffer[i], len)) 1120 return -EFAULT; 1121 buf[len] = 0; 1122 1123 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1124 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1125 1126 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr); 1127 1128 if(debug) 1129 printk("pktgen: dst6 set to: %s\n", buf); 1130 1131 i += len; 1132 sprintf(pg_result, "OK: dst6=%s", buf); 1133 return count; 1134 } 1135 if (!strcmp(name, "dst6_min")) { 1136 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1137 if (len < 0) return len; 1138 1139 pkt_dev->flags |= F_IPV6; 1140 1141 if (copy_from_user(buf, &user_buffer[i], len)) 1142 return -EFAULT; 1143 buf[len] = 0; 1144 1145 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1146 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1147 1148 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->min_in6_daddr); 1149 if(debug) 1150 printk("pktgen: dst6_min set to: %s\n", buf); 1151 1152 i += len; 1153 sprintf(pg_result, "OK: dst6_min=%s", buf); 1154 return count; 1155 } 1156 if (!strcmp(name, "dst6_max")) { 1157 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1158 if (len < 0) return len; 1159 1160 pkt_dev->flags |= F_IPV6; 1161 1162 if (copy_from_user(buf, &user_buffer[i], len)) 1163 return -EFAULT; 1164 buf[len] = 0; 1165 1166 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1167 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1168 1169 if(debug) 1170 printk("pktgen: dst6_max set to: %s\n", buf); 1171 1172 i += len; 1173 sprintf(pg_result, "OK: dst6_max=%s", buf); 1174 return count; 1175 } 1176 if (!strcmp(name, "src6")) { 1177 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1178 if (len < 0) return len; 1179 1180 pkt_dev->flags |= F_IPV6; 1181 1182 if (copy_from_user(buf, &user_buffer[i], len)) 1183 return -EFAULT; 1184 buf[len] = 0; 1185 1186 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1187 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1188 1189 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr); 1190 1191 if(debug) 1192 printk("pktgen: src6 set to: %s\n", buf); 1193 1194 i += len; 1195 sprintf(pg_result, "OK: src6=%s", buf); 1196 return count; 1197 } 1198 if (!strcmp(name, "src_min")) { 1199 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1200 if (len < 0) { return len; } 1201 if (copy_from_user(buf, &user_buffer[i], len)) 1202 return -EFAULT; 1203 buf[len] = 0; 1204 if (strcmp(buf, pkt_dev->src_min) != 0) { 1205 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1206 strncpy(pkt_dev->src_min, buf, len); 1207 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1208 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1209 } 1210 if(debug) 1211 printk("pktgen: src_min set to: %s\n", pkt_dev->src_min); 1212 i += len; 1213 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1214 return count; 1215 } 1216 if (!strcmp(name, "src_max")) { 1217 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1218 if (len < 0) { return len; } 1219 if (copy_from_user(buf, &user_buffer[i], len)) 1220 return -EFAULT; 1221 buf[len] = 0; 1222 if (strcmp(buf, pkt_dev->src_max) != 0) { 1223 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1224 strncpy(pkt_dev->src_max, buf, len); 1225 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1226 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1227 } 1228 if(debug) 1229 printk("pktgen: src_max set to: %s\n", pkt_dev->src_max); 1230 i += len; 1231 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1232 return count; 1233 } 1234 if (!strcmp(name, "dst_mac")) { 1235 char *v = valstr; 1236 unsigned char old_dmac[6]; 1237 unsigned char *m = pkt_dev->dst_mac; 1238 memcpy(old_dmac, pkt_dev->dst_mac, 6); 1239 1240 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1241 if (len < 0) { return len; } 1242 memset(valstr, 0, sizeof(valstr)); 1243 if( copy_from_user(valstr, &user_buffer[i], len)) 1244 return -EFAULT; 1245 i += len; 1246 1247 for(*m = 0;*v && m < pkt_dev->dst_mac + 6; v++) { 1248 if (*v >= '0' && *v <= '9') { 1249 *m *= 16; 1250 *m += *v - '0'; 1251 } 1252 if (*v >= 'A' && *v <= 'F') { 1253 *m *= 16; 1254 *m += *v - 'A' + 10; 1255 } 1256 if (*v >= 'a' && *v <= 'f') { 1257 *m *= 16; 1258 *m += *v - 'a' + 10; 1259 } 1260 if (*v == ':') { 1261 m++; 1262 *m = 0; 1263 } 1264 } 1265 1266 /* Set up Dest MAC */ 1267 if (memcmp(old_dmac, pkt_dev->dst_mac, 6) != 0) 1268 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, 6); 1269 1270 sprintf(pg_result, "OK: dstmac"); 1271 return count; 1272 } 1273 if (!strcmp(name, "src_mac")) { 1274 char *v = valstr; 1275 unsigned char *m = pkt_dev->src_mac; 1276 1277 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1278 if (len < 0) { return len; } 1279 memset(valstr, 0, sizeof(valstr)); 1280 if( copy_from_user(valstr, &user_buffer[i], len)) 1281 return -EFAULT; 1282 i += len; 1283 1284 for(*m = 0;*v && m < pkt_dev->src_mac + 6; v++) { 1285 if (*v >= '0' && *v <= '9') { 1286 *m *= 16; 1287 *m += *v - '0'; 1288 } 1289 if (*v >= 'A' && *v <= 'F') { 1290 *m *= 16; 1291 *m += *v - 'A' + 10; 1292 } 1293 if (*v >= 'a' && *v <= 'f') { 1294 *m *= 16; 1295 *m += *v - 'a' + 10; 1296 } 1297 if (*v == ':') { 1298 m++; 1299 *m = 0; 1300 } 1301 } 1302 1303 sprintf(pg_result, "OK: srcmac"); 1304 return count; 1305 } 1306 1307 if (!strcmp(name, "clear_counters")) { 1308 pktgen_clear_counters(pkt_dev); 1309 sprintf(pg_result, "OK: Clearing counters.\n"); 1310 return count; 1311 } 1312 1313 if (!strcmp(name, "flows")) { 1314 len = num_arg(&user_buffer[i], 10, &value); 1315 if (len < 0) { return len; } 1316 i += len; 1317 if (value > MAX_CFLOWS) 1318 value = MAX_CFLOWS; 1319 1320 pkt_dev->cflows = value; 1321 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1322 return count; 1323 } 1324 1325 if (!strcmp(name, "flowlen")) { 1326 len = num_arg(&user_buffer[i], 10, &value); 1327 if (len < 0) { return len; } 1328 i += len; 1329 pkt_dev->lflow = value; 1330 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1331 return count; 1332 } 1333 1334 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1335 return -EINVAL; 1336 } 1337 1338 static int proc_thread_read(char *buf , char **start, off_t offset, 1339 int len, int *eof, void *data) 1340 { 1341 char *p; 1342 struct pktgen_thread *t = (struct pktgen_thread*)(data); 1343 struct pktgen_dev *pkt_dev = NULL; 1344 1345 1346 if (!t) { 1347 printk("pktgen: ERROR: could not find thread in proc_thread_read\n"); 1348 return -EINVAL; 1349 } 1350 1351 p = buf; 1352 p += sprintf(p, "Name: %s max_before_softirq: %d\n", 1353 t->name, t->max_before_softirq); 1354 1355 p += sprintf(p, "Running: "); 1356 1357 if_lock(t); 1358 for(pkt_dev = t->if_list;pkt_dev; pkt_dev = pkt_dev->next) 1359 if(pkt_dev->running) 1360 p += sprintf(p, "%s ", pkt_dev->ifname); 1361 1362 p += sprintf(p, "\nStopped: "); 1363 1364 for(pkt_dev = t->if_list;pkt_dev; pkt_dev = pkt_dev->next) 1365 if(!pkt_dev->running) 1366 p += sprintf(p, "%s ", pkt_dev->ifname); 1367 1368 if (t->result[0]) 1369 p += sprintf(p, "\nResult: %s\n", t->result); 1370 else 1371 p += sprintf(p, "\nResult: NA\n"); 1372 1373 *eof = 1; 1374 1375 if_unlock(t); 1376 1377 return p - buf; 1378 } 1379 1380 static int proc_thread_write(struct file *file, const char __user *user_buffer, 1381 unsigned long count, void *data) 1382 { 1383 int i = 0, max, len, ret; 1384 char name[40]; 1385 struct pktgen_thread *t; 1386 char *pg_result; 1387 unsigned long value = 0; 1388 1389 if (count < 1) { 1390 // sprintf(pg_result, "Wrong command format"); 1391 return -EINVAL; 1392 } 1393 1394 max = count - i; 1395 len = count_trail_chars(&user_buffer[i], max); 1396 if (len < 0) 1397 return len; 1398 1399 i += len; 1400 1401 /* Read variable name */ 1402 1403 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1404 if (len < 0) 1405 return len; 1406 1407 memset(name, 0, sizeof(name)); 1408 if (copy_from_user(name, &user_buffer[i], len)) 1409 return -EFAULT; 1410 i += len; 1411 1412 max = count -i; 1413 len = count_trail_chars(&user_buffer[i], max); 1414 if (len < 0) 1415 return len; 1416 1417 i += len; 1418 1419 if (debug) 1420 printk("pktgen: t=%s, count=%lu\n", name, count); 1421 1422 1423 t = (struct pktgen_thread*)(data); 1424 if(!t) { 1425 printk("pktgen: ERROR: No thread\n"); 1426 ret = -EINVAL; 1427 goto out; 1428 } 1429 1430 pg_result = &(t->result[0]); 1431 1432 if (!strcmp(name, "add_device")) { 1433 char f[32]; 1434 memset(f, 0, 32); 1435 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1436 if (len < 0) { 1437 ret = len; 1438 goto out; 1439 } 1440 if( copy_from_user(f, &user_buffer[i], len) ) 1441 return -EFAULT; 1442 i += len; 1443 thread_lock(); 1444 pktgen_add_device(t, f); 1445 thread_unlock(); 1446 ret = count; 1447 sprintf(pg_result, "OK: add_device=%s", f); 1448 goto out; 1449 } 1450 1451 if (!strcmp(name, "rem_device_all")) { 1452 thread_lock(); 1453 t->control |= T_REMDEV; 1454 thread_unlock(); 1455 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1456 ret = count; 1457 sprintf(pg_result, "OK: rem_device_all"); 1458 goto out; 1459 } 1460 1461 if (!strcmp(name, "max_before_softirq")) { 1462 len = num_arg(&user_buffer[i], 10, &value); 1463 thread_lock(); 1464 t->max_before_softirq = value; 1465 thread_unlock(); 1466 ret = count; 1467 sprintf(pg_result, "OK: max_before_softirq=%lu", value); 1468 goto out; 1469 } 1470 1471 ret = -EINVAL; 1472 out: 1473 1474 return ret; 1475 } 1476 1477 static int create_proc_dir(void) 1478 { 1479 pg_proc_dir = proc_mkdir(PG_PROC_DIR, NULL); 1480 1481 if (!pg_proc_dir) 1482 return -ENODEV; 1483 1484 return 0; 1485 } 1486 1487 static int remove_proc_dir(void) 1488 { 1489 remove_proc_entry(PG_PROC_DIR, NULL); 1490 return 0; 1491 } 1492 1493 /* Think find or remove for NN */ 1494 static struct pktgen_dev *__pktgen_NN_threads(const char* ifname, int remove) 1495 { 1496 struct pktgen_thread *t; 1497 struct pktgen_dev *pkt_dev = NULL; 1498 1499 t = pktgen_threads; 1500 1501 while (t) { 1502 pkt_dev = pktgen_find_dev(t, ifname); 1503 if (pkt_dev) { 1504 if(remove) { 1505 if_lock(t); 1506 pktgen_remove_device(t, pkt_dev); 1507 if_unlock(t); 1508 } 1509 break; 1510 } 1511 t = t->next; 1512 } 1513 return pkt_dev; 1514 } 1515 1516 static struct pktgen_dev *pktgen_NN_threads(const char* ifname, int remove) 1517 { 1518 struct pktgen_dev *pkt_dev = NULL; 1519 thread_lock(); 1520 pkt_dev = __pktgen_NN_threads(ifname, remove); 1521 thread_unlock(); 1522 return pkt_dev; 1523 } 1524 1525 static int pktgen_device_event(struct notifier_block *unused, unsigned long event, void *ptr) 1526 { 1527 struct net_device *dev = (struct net_device *)(ptr); 1528 1529 /* It is OK that we do not hold the group lock right now, 1530 * as we run under the RTNL lock. 1531 */ 1532 1533 switch (event) { 1534 case NETDEV_CHANGEADDR: 1535 case NETDEV_GOING_DOWN: 1536 case NETDEV_DOWN: 1537 case NETDEV_UP: 1538 /* Ignore for now */ 1539 break; 1540 1541 case NETDEV_UNREGISTER: 1542 pktgen_NN_threads(dev->name, REMOVE); 1543 break; 1544 }; 1545 1546 return NOTIFY_DONE; 1547 } 1548 1549 /* Associate pktgen_dev with a device. */ 1550 1551 static struct net_device* pktgen_setup_dev(struct pktgen_dev *pkt_dev) { 1552 struct net_device *odev; 1553 1554 /* Clean old setups */ 1555 1556 if (pkt_dev->odev) { 1557 dev_put(pkt_dev->odev); 1558 pkt_dev->odev = NULL; 1559 } 1560 1561 odev = dev_get_by_name(pkt_dev->ifname); 1562 1563 if (!odev) { 1564 printk("pktgen: no such netdevice: \"%s\"\n", pkt_dev->ifname); 1565 goto out; 1566 } 1567 if (odev->type != ARPHRD_ETHER) { 1568 printk("pktgen: not an ethernet device: \"%s\"\n", pkt_dev->ifname); 1569 goto out_put; 1570 } 1571 if (!netif_running(odev)) { 1572 printk("pktgen: device is down: \"%s\"\n", pkt_dev->ifname); 1573 goto out_put; 1574 } 1575 pkt_dev->odev = odev; 1576 1577 return pkt_dev->odev; 1578 1579 out_put: 1580 dev_put(odev); 1581 out: 1582 return NULL; 1583 1584 } 1585 1586 /* Read pkt_dev from the interface and set up internal pktgen_dev 1587 * structure to have the right information to create/send packets 1588 */ 1589 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 1590 { 1591 /* Try once more, just in case it works now. */ 1592 if (!pkt_dev->odev) 1593 pktgen_setup_dev(pkt_dev); 1594 1595 if (!pkt_dev->odev) { 1596 printk("pktgen: ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 1597 sprintf(pkt_dev->result, "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 1598 return; 1599 } 1600 1601 /* Default to the interface's mac if not explicitly set. */ 1602 1603 if ((pkt_dev->src_mac[0] == 0) && 1604 (pkt_dev->src_mac[1] == 0) && 1605 (pkt_dev->src_mac[2] == 0) && 1606 (pkt_dev->src_mac[3] == 0) && 1607 (pkt_dev->src_mac[4] == 0) && 1608 (pkt_dev->src_mac[5] == 0)) { 1609 1610 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, 6); 1611 } 1612 /* Set up Dest MAC */ 1613 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, 6); 1614 1615 /* Set up pkt size */ 1616 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 1617 1618 if(pkt_dev->flags & F_IPV6) { 1619 /* 1620 * Skip this automatic address setting until locks or functions 1621 * gets exported 1622 */ 1623 1624 #ifdef NOTNOW 1625 int i, set = 0, err=1; 1626 struct inet6_dev *idev; 1627 1628 for(i=0; i< IN6_ADDR_HSIZE; i++) 1629 if(pkt_dev->cur_in6_saddr.s6_addr[i]) { 1630 set = 1; 1631 break; 1632 } 1633 1634 if(!set) { 1635 1636 /* 1637 * Use linklevel address if unconfigured. 1638 * 1639 * use ipv6_get_lladdr if/when it's get exported 1640 */ 1641 1642 1643 read_lock(&addrconf_lock); 1644 if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) { 1645 struct inet6_ifaddr *ifp; 1646 1647 read_lock_bh(&idev->lock); 1648 for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { 1649 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { 1650 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &ifp->addr); 1651 err = 0; 1652 break; 1653 } 1654 } 1655 read_unlock_bh(&idev->lock); 1656 } 1657 read_unlock(&addrconf_lock); 1658 if(err) printk("pktgen: ERROR: IPv6 link address not availble.\n"); 1659 } 1660 #endif 1661 } 1662 else { 1663 pkt_dev->saddr_min = 0; 1664 pkt_dev->saddr_max = 0; 1665 if (strlen(pkt_dev->src_min) == 0) { 1666 1667 struct in_device *in_dev; 1668 1669 rcu_read_lock(); 1670 in_dev = __in_dev_get_rcu(pkt_dev->odev); 1671 if (in_dev) { 1672 if (in_dev->ifa_list) { 1673 pkt_dev->saddr_min = in_dev->ifa_list->ifa_address; 1674 pkt_dev->saddr_max = pkt_dev->saddr_min; 1675 } 1676 } 1677 rcu_read_unlock(); 1678 } 1679 else { 1680 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1681 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1682 } 1683 1684 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1685 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1686 } 1687 /* Initialize current values. */ 1688 pkt_dev->cur_dst_mac_offset = 0; 1689 pkt_dev->cur_src_mac_offset = 0; 1690 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1691 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1692 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 1693 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 1694 pkt_dev->nflows = 0; 1695 } 1696 1697 static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us) 1698 { 1699 __u64 start; 1700 __u64 now; 1701 1702 start = now = getCurUs(); 1703 printk(KERN_INFO "sleeping for %d\n", (int)(spin_until_us - now)); 1704 while (now < spin_until_us) { 1705 /* TODO: optimise sleeping behavior */ 1706 if (spin_until_us - now > jiffies_to_usecs(1)+1) 1707 schedule_timeout_interruptible(1); 1708 else if (spin_until_us - now > 100) { 1709 do_softirq(); 1710 if (!pkt_dev->running) 1711 return; 1712 if (need_resched()) 1713 schedule(); 1714 } 1715 1716 now = getCurUs(); 1717 } 1718 1719 pkt_dev->idle_acc += now - start; 1720 } 1721 1722 1723 /* Increment/randomize headers according to flags and current values 1724 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 1725 */ 1726 static void mod_cur_headers(struct pktgen_dev *pkt_dev) { 1727 __u32 imn; 1728 __u32 imx; 1729 int flow = 0; 1730 1731 if(pkt_dev->cflows) { 1732 flow = pktgen_random() % pkt_dev->cflows; 1733 1734 if (pkt_dev->flows[flow].count > pkt_dev->lflow) 1735 pkt_dev->flows[flow].count = 0; 1736 } 1737 1738 1739 /* Deal with source MAC */ 1740 if (pkt_dev->src_mac_count > 1) { 1741 __u32 mc; 1742 __u32 tmp; 1743 1744 if (pkt_dev->flags & F_MACSRC_RND) 1745 mc = pktgen_random() % (pkt_dev->src_mac_count); 1746 else { 1747 mc = pkt_dev->cur_src_mac_offset++; 1748 if (pkt_dev->cur_src_mac_offset > pkt_dev->src_mac_count) 1749 pkt_dev->cur_src_mac_offset = 0; 1750 } 1751 1752 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 1753 pkt_dev->hh[11] = tmp; 1754 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 1755 pkt_dev->hh[10] = tmp; 1756 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 1757 pkt_dev->hh[9] = tmp; 1758 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 1759 pkt_dev->hh[8] = tmp; 1760 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 1761 pkt_dev->hh[7] = tmp; 1762 } 1763 1764 /* Deal with Destination MAC */ 1765 if (pkt_dev->dst_mac_count > 1) { 1766 __u32 mc; 1767 __u32 tmp; 1768 1769 if (pkt_dev->flags & F_MACDST_RND) 1770 mc = pktgen_random() % (pkt_dev->dst_mac_count); 1771 1772 else { 1773 mc = pkt_dev->cur_dst_mac_offset++; 1774 if (pkt_dev->cur_dst_mac_offset > pkt_dev->dst_mac_count) { 1775 pkt_dev->cur_dst_mac_offset = 0; 1776 } 1777 } 1778 1779 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 1780 pkt_dev->hh[5] = tmp; 1781 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 1782 pkt_dev->hh[4] = tmp; 1783 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 1784 pkt_dev->hh[3] = tmp; 1785 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 1786 pkt_dev->hh[2] = tmp; 1787 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 1788 pkt_dev->hh[1] = tmp; 1789 } 1790 1791 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 1792 if (pkt_dev->flags & F_UDPSRC_RND) 1793 pkt_dev->cur_udp_src = ((pktgen_random() % (pkt_dev->udp_src_max - pkt_dev->udp_src_min)) + pkt_dev->udp_src_min); 1794 1795 else { 1796 pkt_dev->cur_udp_src++; 1797 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 1798 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 1799 } 1800 } 1801 1802 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 1803 if (pkt_dev->flags & F_UDPDST_RND) { 1804 pkt_dev->cur_udp_dst = ((pktgen_random() % (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)) + pkt_dev->udp_dst_min); 1805 } 1806 else { 1807 pkt_dev->cur_udp_dst++; 1808 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 1809 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 1810 } 1811 } 1812 1813 if (!(pkt_dev->flags & F_IPV6)) { 1814 1815 if ((imn = ntohl(pkt_dev->saddr_min)) < (imx = ntohl(pkt_dev->saddr_max))) { 1816 __u32 t; 1817 if (pkt_dev->flags & F_IPSRC_RND) 1818 t = ((pktgen_random() % (imx - imn)) + imn); 1819 else { 1820 t = ntohl(pkt_dev->cur_saddr); 1821 t++; 1822 if (t > imx) { 1823 t = imn; 1824 } 1825 } 1826 pkt_dev->cur_saddr = htonl(t); 1827 } 1828 1829 if (pkt_dev->cflows && pkt_dev->flows[flow].count != 0) { 1830 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 1831 } else { 1832 1833 if ((imn = ntohl(pkt_dev->daddr_min)) < (imx = ntohl(pkt_dev->daddr_max))) { 1834 __u32 t; 1835 if (pkt_dev->flags & F_IPDST_RND) { 1836 1837 t = ((pktgen_random() % (imx - imn)) + imn); 1838 t = htonl(t); 1839 1840 while( LOOPBACK(t) || MULTICAST(t) || BADCLASS(t) || ZERONET(t) || LOCAL_MCAST(t) ) { 1841 t = ((pktgen_random() % (imx - imn)) + imn); 1842 t = htonl(t); 1843 } 1844 pkt_dev->cur_daddr = t; 1845 } 1846 1847 else { 1848 t = ntohl(pkt_dev->cur_daddr); 1849 t++; 1850 if (t > imx) { 1851 t = imn; 1852 } 1853 pkt_dev->cur_daddr = htonl(t); 1854 } 1855 } 1856 if(pkt_dev->cflows) { 1857 pkt_dev->flows[flow].cur_daddr = pkt_dev->cur_daddr; 1858 pkt_dev->nflows++; 1859 } 1860 } 1861 } 1862 else /* IPV6 * */ 1863 { 1864 if(pkt_dev->min_in6_daddr.s6_addr32[0] == 0 && 1865 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 && 1866 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 && 1867 pkt_dev->min_in6_daddr.s6_addr32[3] == 0); 1868 else { 1869 int i; 1870 1871 /* Only random destinations yet */ 1872 1873 for(i=0; i < 4; i++) { 1874 pkt_dev->cur_in6_daddr.s6_addr32[i] = 1875 ((pktgen_random() | 1876 pkt_dev->min_in6_daddr.s6_addr32[i]) & 1877 pkt_dev->max_in6_daddr.s6_addr32[i]); 1878 } 1879 } 1880 } 1881 1882 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 1883 __u32 t; 1884 if (pkt_dev->flags & F_TXSIZE_RND) { 1885 t = ((pktgen_random() % (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)) 1886 + pkt_dev->min_pkt_size); 1887 } 1888 else { 1889 t = pkt_dev->cur_pkt_size + 1; 1890 if (t > pkt_dev->max_pkt_size) 1891 t = pkt_dev->min_pkt_size; 1892 } 1893 pkt_dev->cur_pkt_size = t; 1894 } 1895 1896 pkt_dev->flows[flow].count++; 1897 } 1898 1899 1900 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 1901 struct pktgen_dev *pkt_dev) 1902 { 1903 struct sk_buff *skb = NULL; 1904 __u8 *eth; 1905 struct udphdr *udph; 1906 int datalen, iplen; 1907 struct iphdr *iph; 1908 struct pktgen_hdr *pgh = NULL; 1909 1910 /* Update any of the values, used when we're incrementing various 1911 * fields. 1912 */ 1913 mod_cur_headers(pkt_dev); 1914 1915 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16, GFP_ATOMIC); 1916 if (!skb) { 1917 sprintf(pkt_dev->result, "No memory"); 1918 return NULL; 1919 } 1920 1921 skb_reserve(skb, 16); 1922 1923 /* Reserve for ethernet and IP header */ 1924 eth = (__u8 *) skb_push(skb, 14); 1925 iph = (struct iphdr *)skb_put(skb, sizeof(struct iphdr)); 1926 udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr)); 1927 1928 memcpy(eth, pkt_dev->hh, 12); 1929 *(u16*)ð[12] = __constant_htons(ETH_P_IP); 1930 1931 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8; /* Eth + IPh + UDPh */ 1932 if (datalen < sizeof(struct pktgen_hdr)) 1933 datalen = sizeof(struct pktgen_hdr); 1934 1935 udph->source = htons(pkt_dev->cur_udp_src); 1936 udph->dest = htons(pkt_dev->cur_udp_dst); 1937 udph->len = htons(datalen + 8); /* DATA + udphdr */ 1938 udph->check = 0; /* No checksum */ 1939 1940 iph->ihl = 5; 1941 iph->version = 4; 1942 iph->ttl = 32; 1943 iph->tos = 0; 1944 iph->protocol = IPPROTO_UDP; /* UDP */ 1945 iph->saddr = pkt_dev->cur_saddr; 1946 iph->daddr = pkt_dev->cur_daddr; 1947 iph->frag_off = 0; 1948 iplen = 20 + 8 + datalen; 1949 iph->tot_len = htons(iplen); 1950 iph->check = 0; 1951 iph->check = ip_fast_csum((void *) iph, iph->ihl); 1952 skb->protocol = __constant_htons(ETH_P_IP); 1953 skb->mac.raw = ((u8 *)iph) - 14; 1954 skb->dev = odev; 1955 skb->pkt_type = PACKET_HOST; 1956 1957 if (pkt_dev->nfrags <= 0) 1958 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 1959 else { 1960 int frags = pkt_dev->nfrags; 1961 int i; 1962 1963 pgh = (struct pktgen_hdr*)(((char*)(udph)) + 8); 1964 1965 if (frags > MAX_SKB_FRAGS) 1966 frags = MAX_SKB_FRAGS; 1967 if (datalen > frags*PAGE_SIZE) { 1968 skb_put(skb, datalen-frags*PAGE_SIZE); 1969 datalen = frags*PAGE_SIZE; 1970 } 1971 1972 i = 0; 1973 while (datalen > 0) { 1974 struct page *page = alloc_pages(GFP_KERNEL, 0); 1975 skb_shinfo(skb)->frags[i].page = page; 1976 skb_shinfo(skb)->frags[i].page_offset = 0; 1977 skb_shinfo(skb)->frags[i].size = 1978 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 1979 datalen -= skb_shinfo(skb)->frags[i].size; 1980 skb->len += skb_shinfo(skb)->frags[i].size; 1981 skb->data_len += skb_shinfo(skb)->frags[i].size; 1982 i++; 1983 skb_shinfo(skb)->nr_frags = i; 1984 } 1985 1986 while (i < frags) { 1987 int rem; 1988 1989 if (i == 0) 1990 break; 1991 1992 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 1993 if (rem == 0) 1994 break; 1995 1996 skb_shinfo(skb)->frags[i - 1].size -= rem; 1997 1998 skb_shinfo(skb)->frags[i] = skb_shinfo(skb)->frags[i - 1]; 1999 get_page(skb_shinfo(skb)->frags[i].page); 2000 skb_shinfo(skb)->frags[i].page = skb_shinfo(skb)->frags[i - 1].page; 2001 skb_shinfo(skb)->frags[i].page_offset += skb_shinfo(skb)->frags[i - 1].size; 2002 skb_shinfo(skb)->frags[i].size = rem; 2003 i++; 2004 skb_shinfo(skb)->nr_frags = i; 2005 } 2006 } 2007 2008 /* Stamp the time, and sequence number, convert them to network byte order */ 2009 2010 if (pgh) { 2011 struct timeval timestamp; 2012 2013 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2014 pgh->seq_num = htonl(pkt_dev->seq_num); 2015 2016 do_gettimeofday(×tamp); 2017 pgh->tv_sec = htonl(timestamp.tv_sec); 2018 pgh->tv_usec = htonl(timestamp.tv_usec); 2019 } 2020 pkt_dev->seq_num++; 2021 2022 return skb; 2023 } 2024 2025 /* 2026 * scan_ip6, fmt_ip taken from dietlibc-0.21 2027 * Author Felix von Leitner <felix-dietlibc@fefe.de> 2028 * 2029 * Slightly modified for kernel. 2030 * Should be candidate for net/ipv4/utils.c 2031 * --ro 2032 */ 2033 2034 static unsigned int scan_ip6(const char *s,char ip[16]) 2035 { 2036 unsigned int i; 2037 unsigned int len=0; 2038 unsigned long u; 2039 char suffix[16]; 2040 unsigned int prefixlen=0; 2041 unsigned int suffixlen=0; 2042 __u32 tmp; 2043 2044 for (i=0; i<16; i++) ip[i]=0; 2045 2046 for (;;) { 2047 if (*s == ':') { 2048 len++; 2049 if (s[1] == ':') { /* Found "::", skip to part 2 */ 2050 s+=2; 2051 len++; 2052 break; 2053 } 2054 s++; 2055 } 2056 { 2057 char *tmp; 2058 u=simple_strtoul(s,&tmp,16); 2059 i=tmp-s; 2060 } 2061 2062 if (!i) return 0; 2063 if (prefixlen==12 && s[i]=='.') { 2064 2065 /* the last 4 bytes may be written as IPv4 address */ 2066 2067 tmp = in_aton(s); 2068 memcpy((struct in_addr*)(ip+12), &tmp, sizeof(tmp)); 2069 return i+len; 2070 } 2071 ip[prefixlen++] = (u >> 8); 2072 ip[prefixlen++] = (u & 255); 2073 s += i; len += i; 2074 if (prefixlen==16) 2075 return len; 2076 } 2077 2078 /* part 2, after "::" */ 2079 for (;;) { 2080 if (*s == ':') { 2081 if (suffixlen==0) 2082 break; 2083 s++; 2084 len++; 2085 } else if (suffixlen!=0) 2086 break; 2087 { 2088 char *tmp; 2089 u=simple_strtol(s,&tmp,16); 2090 i=tmp-s; 2091 } 2092 if (!i) { 2093 if (*s) len--; 2094 break; 2095 } 2096 if (suffixlen+prefixlen<=12 && s[i]=='.') { 2097 tmp = in_aton(s); 2098 memcpy((struct in_addr*)(suffix+suffixlen), &tmp, sizeof(tmp)); 2099 suffixlen+=4; 2100 len+=strlen(s); 2101 break; 2102 } 2103 suffix[suffixlen++] = (u >> 8); 2104 suffix[suffixlen++] = (u & 255); 2105 s += i; len += i; 2106 if (prefixlen+suffixlen==16) 2107 break; 2108 } 2109 for (i=0; i<suffixlen; i++) 2110 ip[16-suffixlen+i] = suffix[i]; 2111 return len; 2112 } 2113 2114 static char tohex(char hexdigit) { 2115 return hexdigit>9?hexdigit+'a'-10:hexdigit+'0'; 2116 } 2117 2118 static int fmt_xlong(char* s,unsigned int i) { 2119 char* bak=s; 2120 *s=tohex((i>>12)&0xf); if (s!=bak || *s!='0') ++s; 2121 *s=tohex((i>>8)&0xf); if (s!=bak || *s!='0') ++s; 2122 *s=tohex((i>>4)&0xf); if (s!=bak || *s!='0') ++s; 2123 *s=tohex(i&0xf); 2124 return s-bak+1; 2125 } 2126 2127 static unsigned int fmt_ip6(char *s,const char ip[16]) { 2128 unsigned int len; 2129 unsigned int i; 2130 unsigned int temp; 2131 unsigned int compressing; 2132 int j; 2133 2134 len = 0; compressing = 0; 2135 for (j=0; j<16; j+=2) { 2136 2137 #ifdef V4MAPPEDPREFIX 2138 if (j==12 && !memcmp(ip,V4mappedprefix,12)) { 2139 inet_ntoa_r(*(struct in_addr*)(ip+12),s); 2140 temp=strlen(s); 2141 return len+temp; 2142 } 2143 #endif 2144 temp = ((unsigned long) (unsigned char) ip[j] << 8) + 2145 (unsigned long) (unsigned char) ip[j+1]; 2146 if (temp == 0) { 2147 if (!compressing) { 2148 compressing=1; 2149 if (j==0) { 2150 *s++=':'; ++len; 2151 } 2152 } 2153 } else { 2154 if (compressing) { 2155 compressing=0; 2156 *s++=':'; ++len; 2157 } 2158 i = fmt_xlong(s,temp); len += i; s += i; 2159 if (j<14) { 2160 *s++ = ':'; 2161 ++len; 2162 } 2163 } 2164 } 2165 if (compressing) { 2166 *s++=':'; ++len; 2167 } 2168 *s=0; 2169 return len; 2170 } 2171 2172 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2173 struct pktgen_dev *pkt_dev) 2174 { 2175 struct sk_buff *skb = NULL; 2176 __u8 *eth; 2177 struct udphdr *udph; 2178 int datalen; 2179 struct ipv6hdr *iph; 2180 struct pktgen_hdr *pgh = NULL; 2181 2182 /* Update any of the values, used when we're incrementing various 2183 * fields. 2184 */ 2185 mod_cur_headers(pkt_dev); 2186 2187 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16, GFP_ATOMIC); 2188 if (!skb) { 2189 sprintf(pkt_dev->result, "No memory"); 2190 return NULL; 2191 } 2192 2193 skb_reserve(skb, 16); 2194 2195 /* Reserve for ethernet and IP header */ 2196 eth = (__u8 *) skb_push(skb, 14); 2197 iph = (struct ipv6hdr *)skb_put(skb, sizeof(struct ipv6hdr)); 2198 udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr)); 2199 2200 memcpy(eth, pkt_dev->hh, 12); 2201 *(u16*)ð[12] = __constant_htons(ETH_P_IPV6); 2202 2203 datalen = pkt_dev->cur_pkt_size-14- 2204 sizeof(struct ipv6hdr)-sizeof(struct udphdr); /* Eth + IPh + UDPh */ 2205 2206 if (datalen < sizeof(struct pktgen_hdr)) { 2207 datalen = sizeof(struct pktgen_hdr); 2208 if (net_ratelimit()) 2209 printk(KERN_INFO "pktgen: increased datalen to %d\n", datalen); 2210 } 2211 2212 udph->source = htons(pkt_dev->cur_udp_src); 2213 udph->dest = htons(pkt_dev->cur_udp_dst); 2214 udph->len = htons(datalen + sizeof(struct udphdr)); 2215 udph->check = 0; /* No checksum */ 2216 2217 *(u32*)iph = __constant_htonl(0x60000000); /* Version + flow */ 2218 2219 iph->hop_limit = 32; 2220 2221 iph->payload_len = htons(sizeof(struct udphdr) + datalen); 2222 iph->nexthdr = IPPROTO_UDP; 2223 2224 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr); 2225 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr); 2226 2227 skb->mac.raw = ((u8 *)iph) - 14; 2228 skb->protocol = __constant_htons(ETH_P_IPV6); 2229 skb->dev = odev; 2230 skb->pkt_type = PACKET_HOST; 2231 2232 if (pkt_dev->nfrags <= 0) 2233 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 2234 else { 2235 int frags = pkt_dev->nfrags; 2236 int i; 2237 2238 pgh = (struct pktgen_hdr*)(((char*)(udph)) + 8); 2239 2240 if (frags > MAX_SKB_FRAGS) 2241 frags = MAX_SKB_FRAGS; 2242 if (datalen > frags*PAGE_SIZE) { 2243 skb_put(skb, datalen-frags*PAGE_SIZE); 2244 datalen = frags*PAGE_SIZE; 2245 } 2246 2247 i = 0; 2248 while (datalen > 0) { 2249 struct page *page = alloc_pages(GFP_KERNEL, 0); 2250 skb_shinfo(skb)->frags[i].page = page; 2251 skb_shinfo(skb)->frags[i].page_offset = 0; 2252 skb_shinfo(skb)->frags[i].size = 2253 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 2254 datalen -= skb_shinfo(skb)->frags[i].size; 2255 skb->len += skb_shinfo(skb)->frags[i].size; 2256 skb->data_len += skb_shinfo(skb)->frags[i].size; 2257 i++; 2258 skb_shinfo(skb)->nr_frags = i; 2259 } 2260 2261 while (i < frags) { 2262 int rem; 2263 2264 if (i == 0) 2265 break; 2266 2267 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 2268 if (rem == 0) 2269 break; 2270 2271 skb_shinfo(skb)->frags[i - 1].size -= rem; 2272 2273 skb_shinfo(skb)->frags[i] = skb_shinfo(skb)->frags[i - 1]; 2274 get_page(skb_shinfo(skb)->frags[i].page); 2275 skb_shinfo(skb)->frags[i].page = skb_shinfo(skb)->frags[i - 1].page; 2276 skb_shinfo(skb)->frags[i].page_offset += skb_shinfo(skb)->frags[i - 1].size; 2277 skb_shinfo(skb)->frags[i].size = rem; 2278 i++; 2279 skb_shinfo(skb)->nr_frags = i; 2280 } 2281 } 2282 2283 /* Stamp the time, and sequence number, convert them to network byte order */ 2284 /* should we update cloned packets too ? */ 2285 if (pgh) { 2286 struct timeval timestamp; 2287 2288 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2289 pgh->seq_num = htonl(pkt_dev->seq_num); 2290 2291 do_gettimeofday(×tamp); 2292 pgh->tv_sec = htonl(timestamp.tv_sec); 2293 pgh->tv_usec = htonl(timestamp.tv_usec); 2294 } 2295 pkt_dev->seq_num++; 2296 2297 return skb; 2298 } 2299 2300 static inline struct sk_buff *fill_packet(struct net_device *odev, 2301 struct pktgen_dev *pkt_dev) 2302 { 2303 if(pkt_dev->flags & F_IPV6) 2304 return fill_packet_ipv6(odev, pkt_dev); 2305 else 2306 return fill_packet_ipv4(odev, pkt_dev); 2307 } 2308 2309 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 2310 { 2311 pkt_dev->seq_num = 1; 2312 pkt_dev->idle_acc = 0; 2313 pkt_dev->sofar = 0; 2314 pkt_dev->tx_bytes = 0; 2315 pkt_dev->errors = 0; 2316 } 2317 2318 /* Set up structure for sending pkts, clear counters */ 2319 2320 static void pktgen_run(struct pktgen_thread *t) 2321 { 2322 struct pktgen_dev *pkt_dev = NULL; 2323 int started = 0; 2324 2325 PG_DEBUG(printk("pktgen: entering pktgen_run. %p\n", t)); 2326 2327 if_lock(t); 2328 for (pkt_dev = t->if_list; pkt_dev; pkt_dev = pkt_dev->next ) { 2329 2330 /* 2331 * setup odev and create initial packet. 2332 */ 2333 pktgen_setup_inject(pkt_dev); 2334 2335 if(pkt_dev->odev) { 2336 pktgen_clear_counters(pkt_dev); 2337 pkt_dev->running = 1; /* Cranke yeself! */ 2338 pkt_dev->skb = NULL; 2339 pkt_dev->started_at = getCurUs(); 2340 pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */ 2341 pkt_dev->next_tx_ns = 0; 2342 2343 strcpy(pkt_dev->result, "Starting"); 2344 started++; 2345 } 2346 else 2347 strcpy(pkt_dev->result, "Error starting"); 2348 } 2349 if_unlock(t); 2350 if(started) t->control &= ~(T_STOP); 2351 } 2352 2353 static void pktgen_stop_all_threads_ifs(void) 2354 { 2355 struct pktgen_thread *t = pktgen_threads; 2356 2357 PG_DEBUG(printk("pktgen: entering pktgen_stop_all_threads.\n")); 2358 2359 thread_lock(); 2360 while(t) { 2361 pktgen_stop(t); 2362 t = t->next; 2363 } 2364 thread_unlock(); 2365 } 2366 2367 static int thread_is_running(struct pktgen_thread *t ) 2368 { 2369 struct pktgen_dev *next; 2370 int res = 0; 2371 2372 for(next=t->if_list; next; next=next->next) { 2373 if(next->running) { 2374 res = 1; 2375 break; 2376 } 2377 } 2378 return res; 2379 } 2380 2381 static int pktgen_wait_thread_run(struct pktgen_thread *t ) 2382 { 2383 if_lock(t); 2384 2385 while(thread_is_running(t)) { 2386 2387 if_unlock(t); 2388 2389 msleep_interruptible(100); 2390 2391 if (signal_pending(current)) 2392 goto signal; 2393 if_lock(t); 2394 } 2395 if_unlock(t); 2396 return 1; 2397 signal: 2398 return 0; 2399 } 2400 2401 static int pktgen_wait_all_threads_run(void) 2402 { 2403 struct pktgen_thread *t = pktgen_threads; 2404 int sig = 1; 2405 2406 while (t) { 2407 sig = pktgen_wait_thread_run(t); 2408 if( sig == 0 ) break; 2409 thread_lock(); 2410 t=t->next; 2411 thread_unlock(); 2412 } 2413 if(sig == 0) { 2414 thread_lock(); 2415 while (t) { 2416 t->control |= (T_STOP); 2417 t=t->next; 2418 } 2419 thread_unlock(); 2420 } 2421 return sig; 2422 } 2423 2424 static void pktgen_run_all_threads(void) 2425 { 2426 struct pktgen_thread *t = pktgen_threads; 2427 2428 PG_DEBUG(printk("pktgen: entering pktgen_run_all_threads.\n")); 2429 2430 thread_lock(); 2431 2432 while(t) { 2433 t->control |= (T_RUN); 2434 t = t->next; 2435 } 2436 thread_unlock(); 2437 2438 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 2439 2440 pktgen_wait_all_threads_run(); 2441 } 2442 2443 2444 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 2445 { 2446 __u64 total_us, bps, mbps, pps, idle; 2447 char *p = pkt_dev->result; 2448 2449 total_us = pkt_dev->stopped_at - pkt_dev->started_at; 2450 2451 idle = pkt_dev->idle_acc; 2452 2453 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", 2454 (unsigned long long) total_us, 2455 (unsigned long long)(total_us - idle), 2456 (unsigned long long) idle, 2457 (unsigned long long) pkt_dev->sofar, 2458 pkt_dev->cur_pkt_size, nr_frags); 2459 2460 pps = pkt_dev->sofar * USEC_PER_SEC; 2461 2462 while ((total_us >> 32) != 0) { 2463 pps >>= 1; 2464 total_us >>= 1; 2465 } 2466 2467 do_div(pps, total_us); 2468 2469 bps = pps * 8 * pkt_dev->cur_pkt_size; 2470 2471 mbps = bps; 2472 do_div(mbps, 1000000); 2473 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 2474 (unsigned long long) pps, 2475 (unsigned long long) mbps, 2476 (unsigned long long) bps, 2477 (unsigned long long) pkt_dev->errors); 2478 } 2479 2480 2481 /* Set stopped-at timer, remove from running list, do counters & statistics */ 2482 2483 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 2484 { 2485 2486 if (!pkt_dev->running) { 2487 printk("pktgen: interface: %s is already stopped\n", pkt_dev->ifname); 2488 return -EINVAL; 2489 } 2490 2491 pkt_dev->stopped_at = getCurUs(); 2492 pkt_dev->running = 0; 2493 2494 show_results(pkt_dev, skb_shinfo(pkt_dev->skb)->nr_frags); 2495 2496 if (pkt_dev->skb) 2497 kfree_skb(pkt_dev->skb); 2498 2499 pkt_dev->skb = NULL; 2500 2501 return 0; 2502 } 2503 2504 static struct pktgen_dev *next_to_run(struct pktgen_thread *t ) 2505 { 2506 struct pktgen_dev *next, *best = NULL; 2507 2508 if_lock(t); 2509 2510 for(next=t->if_list; next ; next=next->next) { 2511 if(!next->running) continue; 2512 if(best == NULL) best=next; 2513 else if ( next->next_tx_us < best->next_tx_us) 2514 best = next; 2515 } 2516 if_unlock(t); 2517 return best; 2518 } 2519 2520 static void pktgen_stop(struct pktgen_thread *t) { 2521 struct pktgen_dev *next = NULL; 2522 2523 PG_DEBUG(printk("pktgen: entering pktgen_stop.\n")); 2524 2525 if_lock(t); 2526 2527 for(next=t->if_list; next; next=next->next) 2528 pktgen_stop_device(next); 2529 2530 if_unlock(t); 2531 } 2532 2533 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 2534 { 2535 struct pktgen_dev *cur, *next = NULL; 2536 2537 /* Remove all devices, free mem */ 2538 2539 if_lock(t); 2540 2541 for(cur=t->if_list; cur; cur=next) { 2542 next = cur->next; 2543 pktgen_remove_device(t, cur); 2544 } 2545 2546 if_unlock(t); 2547 } 2548 2549 static void pktgen_rem_thread(struct pktgen_thread *t) 2550 { 2551 /* Remove from the thread list */ 2552 2553 struct pktgen_thread *tmp = pktgen_threads; 2554 2555 if (strlen(t->fname)) 2556 remove_proc_entry(t->fname, NULL); 2557 2558 thread_lock(); 2559 2560 if (tmp == t) 2561 pktgen_threads = tmp->next; 2562 else { 2563 while (tmp) { 2564 if (tmp->next == t) { 2565 tmp->next = t->next; 2566 t->next = NULL; 2567 break; 2568 } 2569 tmp = tmp->next; 2570 } 2571 } 2572 thread_unlock(); 2573 } 2574 2575 static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev) 2576 { 2577 struct net_device *odev = NULL; 2578 __u64 idle_start = 0; 2579 int ret; 2580 2581 odev = pkt_dev->odev; 2582 2583 if (pkt_dev->delay_us || pkt_dev->delay_ns) { 2584 u64 now; 2585 2586 now = getCurUs(); 2587 if (now < pkt_dev->next_tx_us) 2588 spin(pkt_dev, pkt_dev->next_tx_us); 2589 2590 /* This is max DELAY, this has special meaning of 2591 * "never transmit" 2592 */ 2593 if (pkt_dev->delay_us == 0x7FFFFFFF) { 2594 pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us; 2595 pkt_dev->next_tx_ns = pkt_dev->delay_ns; 2596 goto out; 2597 } 2598 } 2599 2600 if (netif_queue_stopped(odev) || need_resched()) { 2601 idle_start = getCurUs(); 2602 2603 if (!netif_running(odev)) { 2604 pktgen_stop_device(pkt_dev); 2605 goto out; 2606 } 2607 if (need_resched()) 2608 schedule(); 2609 2610 pkt_dev->idle_acc += getCurUs() - idle_start; 2611 2612 if (netif_queue_stopped(odev)) { 2613 pkt_dev->next_tx_us = getCurUs(); /* TODO */ 2614 pkt_dev->next_tx_ns = 0; 2615 goto out; /* Try the next interface */ 2616 } 2617 } 2618 2619 if (pkt_dev->last_ok || !pkt_dev->skb) { 2620 if ((++pkt_dev->clone_count >= pkt_dev->clone_skb ) || (!pkt_dev->skb)) { 2621 /* build a new pkt */ 2622 if (pkt_dev->skb) 2623 kfree_skb(pkt_dev->skb); 2624 2625 pkt_dev->skb = fill_packet(odev, pkt_dev); 2626 if (pkt_dev->skb == NULL) { 2627 printk("pktgen: ERROR: couldn't allocate skb in fill_packet.\n"); 2628 schedule(); 2629 pkt_dev->clone_count--; /* back out increment, OOM */ 2630 goto out; 2631 } 2632 pkt_dev->allocated_skbs++; 2633 pkt_dev->clone_count = 0; /* reset counter */ 2634 } 2635 } 2636 2637 spin_lock_bh(&odev->xmit_lock); 2638 if (!netif_queue_stopped(odev)) { 2639 2640 atomic_inc(&(pkt_dev->skb->users)); 2641 retry_now: 2642 ret = odev->hard_start_xmit(pkt_dev->skb, odev); 2643 if (likely(ret == NETDEV_TX_OK)) { 2644 pkt_dev->last_ok = 1; 2645 pkt_dev->sofar++; 2646 pkt_dev->seq_num++; 2647 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size; 2648 2649 } else if (ret == NETDEV_TX_LOCKED 2650 && (odev->features & NETIF_F_LLTX)) { 2651 cpu_relax(); 2652 goto retry_now; 2653 } else { /* Retry it next time */ 2654 2655 atomic_dec(&(pkt_dev->skb->users)); 2656 2657 if (debug && net_ratelimit()) 2658 printk(KERN_INFO "pktgen: Hard xmit error\n"); 2659 2660 pkt_dev->errors++; 2661 pkt_dev->last_ok = 0; 2662 } 2663 2664 pkt_dev->next_tx_us = getCurUs(); 2665 pkt_dev->next_tx_ns = 0; 2666 2667 pkt_dev->next_tx_us += pkt_dev->delay_us; 2668 pkt_dev->next_tx_ns += pkt_dev->delay_ns; 2669 2670 if (pkt_dev->next_tx_ns > 1000) { 2671 pkt_dev->next_tx_us++; 2672 pkt_dev->next_tx_ns -= 1000; 2673 } 2674 } 2675 2676 else { /* Retry it next time */ 2677 pkt_dev->last_ok = 0; 2678 pkt_dev->next_tx_us = getCurUs(); /* TODO */ 2679 pkt_dev->next_tx_ns = 0; 2680 } 2681 2682 spin_unlock_bh(&odev->xmit_lock); 2683 2684 /* If pkt_dev->count is zero, then run forever */ 2685 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 2686 if (atomic_read(&(pkt_dev->skb->users)) != 1) { 2687 idle_start = getCurUs(); 2688 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 2689 if (signal_pending(current)) { 2690 break; 2691 } 2692 schedule(); 2693 } 2694 pkt_dev->idle_acc += getCurUs() - idle_start; 2695 } 2696 2697 /* Done with this */ 2698 pktgen_stop_device(pkt_dev); 2699 } 2700 out:; 2701 } 2702 2703 /* 2704 * Main loop of the thread goes here 2705 */ 2706 2707 static void pktgen_thread_worker(struct pktgen_thread *t) 2708 { 2709 DEFINE_WAIT(wait); 2710 struct pktgen_dev *pkt_dev = NULL; 2711 int cpu = t->cpu; 2712 sigset_t tmpsig; 2713 u32 max_before_softirq; 2714 u32 tx_since_softirq = 0; 2715 2716 daemonize("pktgen/%d", cpu); 2717 2718 /* Block all signals except SIGKILL, SIGSTOP and SIGTERM */ 2719 2720 spin_lock_irq(¤t->sighand->siglock); 2721 tmpsig = current->blocked; 2722 siginitsetinv(¤t->blocked, 2723 sigmask(SIGKILL) | 2724 sigmask(SIGSTOP)| 2725 sigmask(SIGTERM)); 2726 2727 recalc_sigpending(); 2728 spin_unlock_irq(¤t->sighand->siglock); 2729 2730 /* Migrate to the right CPU */ 2731 set_cpus_allowed(current, cpumask_of_cpu(cpu)); 2732 if (smp_processor_id() != cpu) 2733 BUG(); 2734 2735 init_waitqueue_head(&t->queue); 2736 2737 t->control &= ~(T_TERMINATE); 2738 t->control &= ~(T_RUN); 2739 t->control &= ~(T_STOP); 2740 t->control &= ~(T_REMDEV); 2741 2742 t->pid = current->pid; 2743 2744 PG_DEBUG(printk("pktgen: starting pktgen/%d: pid=%d\n", cpu, current->pid)); 2745 2746 max_before_softirq = t->max_before_softirq; 2747 2748 __set_current_state(TASK_INTERRUPTIBLE); 2749 mb(); 2750 2751 while (1) { 2752 2753 __set_current_state(TASK_RUNNING); 2754 2755 /* 2756 * Get next dev to xmit -- if any. 2757 */ 2758 2759 pkt_dev = next_to_run(t); 2760 2761 if (pkt_dev) { 2762 2763 pktgen_xmit(pkt_dev); 2764 2765 /* 2766 * We like to stay RUNNING but must also give 2767 * others fair share. 2768 */ 2769 2770 tx_since_softirq += pkt_dev->last_ok; 2771 2772 if (tx_since_softirq > max_before_softirq) { 2773 if (local_softirq_pending()) 2774 do_softirq(); 2775 tx_since_softirq = 0; 2776 } 2777 } else { 2778 prepare_to_wait(&(t->queue), &wait, TASK_INTERRUPTIBLE); 2779 schedule_timeout(HZ/10); 2780 finish_wait(&(t->queue), &wait); 2781 } 2782 2783 /* 2784 * Back from sleep, either due to the timeout or signal. 2785 * We check if we have any "posted" work for us. 2786 */ 2787 2788 if (t->control & T_TERMINATE || signal_pending(current)) 2789 /* we received a request to terminate ourself */ 2790 break; 2791 2792 2793 if(t->control & T_STOP) { 2794 pktgen_stop(t); 2795 t->control &= ~(T_STOP); 2796 } 2797 2798 if(t->control & T_RUN) { 2799 pktgen_run(t); 2800 t->control &= ~(T_RUN); 2801 } 2802 2803 if(t->control & T_REMDEV) { 2804 pktgen_rem_all_ifs(t); 2805 t->control &= ~(T_REMDEV); 2806 } 2807 2808 if (need_resched()) 2809 schedule(); 2810 } 2811 2812 PG_DEBUG(printk("pktgen: %s stopping all device\n", t->name)); 2813 pktgen_stop(t); 2814 2815 PG_DEBUG(printk("pktgen: %s removing all device\n", t->name)); 2816 pktgen_rem_all_ifs(t); 2817 2818 PG_DEBUG(printk("pktgen: %s removing thread.\n", t->name)); 2819 pktgen_rem_thread(t); 2820 } 2821 2822 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, const char* ifname) 2823 { 2824 struct pktgen_dev *pkt_dev = NULL; 2825 if_lock(t); 2826 2827 for(pkt_dev=t->if_list; pkt_dev; pkt_dev = pkt_dev->next ) { 2828 if (strcmp(pkt_dev->ifname, ifname) == 0) { 2829 break; 2830 } 2831 } 2832 2833 if_unlock(t); 2834 PG_DEBUG(printk("pktgen: find_dev(%s) returning %p\n", ifname,pkt_dev)); 2835 return pkt_dev; 2836 } 2837 2838 /* 2839 * Adds a dev at front of if_list. 2840 */ 2841 2842 static int add_dev_to_thread(struct pktgen_thread *t, struct pktgen_dev *pkt_dev) 2843 { 2844 int rv = 0; 2845 2846 if_lock(t); 2847 2848 if (pkt_dev->pg_thread) { 2849 printk("pktgen: ERROR: already assigned to a thread.\n"); 2850 rv = -EBUSY; 2851 goto out; 2852 } 2853 pkt_dev->next =t->if_list; t->if_list=pkt_dev; 2854 pkt_dev->pg_thread = t; 2855 pkt_dev->running = 0; 2856 2857 out: 2858 if_unlock(t); 2859 return rv; 2860 } 2861 2862 /* Called under thread lock */ 2863 2864 static int pktgen_add_device(struct pktgen_thread *t, const char* ifname) 2865 { 2866 struct pktgen_dev *pkt_dev; 2867 2868 /* We don't allow a device to be on several threads */ 2869 2870 if( (pkt_dev = __pktgen_NN_threads(ifname, FIND)) == NULL) { 2871 2872 pkt_dev = kmalloc(sizeof(struct pktgen_dev), GFP_KERNEL); 2873 if (!pkt_dev) 2874 return -ENOMEM; 2875 2876 memset(pkt_dev, 0, sizeof(struct pktgen_dev)); 2877 2878 pkt_dev->flows = vmalloc(MAX_CFLOWS*sizeof(struct flow_state)); 2879 if (pkt_dev->flows == NULL) { 2880 kfree(pkt_dev); 2881 return -ENOMEM; 2882 } 2883 memset(pkt_dev->flows, 0, MAX_CFLOWS*sizeof(struct flow_state)); 2884 2885 pkt_dev->min_pkt_size = ETH_ZLEN; 2886 pkt_dev->max_pkt_size = ETH_ZLEN; 2887 pkt_dev->nfrags = 0; 2888 pkt_dev->clone_skb = pg_clone_skb_d; 2889 pkt_dev->delay_us = pg_delay_d / 1000; 2890 pkt_dev->delay_ns = pg_delay_d % 1000; 2891 pkt_dev->count = pg_count_d; 2892 pkt_dev->sofar = 0; 2893 pkt_dev->udp_src_min = 9; /* sink port */ 2894 pkt_dev->udp_src_max = 9; 2895 pkt_dev->udp_dst_min = 9; 2896 pkt_dev->udp_dst_max = 9; 2897 2898 strncpy(pkt_dev->ifname, ifname, 31); 2899 sprintf(pkt_dev->fname, "%s/%s", PG_PROC_DIR, ifname); 2900 2901 if (! pktgen_setup_dev(pkt_dev)) { 2902 printk("pktgen: ERROR: pktgen_setup_dev failed.\n"); 2903 if (pkt_dev->flows) 2904 vfree(pkt_dev->flows); 2905 kfree(pkt_dev); 2906 return -ENODEV; 2907 } 2908 2909 pkt_dev->proc_ent = create_proc_entry(pkt_dev->fname, 0600, NULL); 2910 if (!pkt_dev->proc_ent) { 2911 printk("pktgen: cannot create %s procfs entry.\n", pkt_dev->fname); 2912 if (pkt_dev->flows) 2913 vfree(pkt_dev->flows); 2914 kfree(pkt_dev); 2915 return -EINVAL; 2916 } 2917 pkt_dev->proc_ent->read_proc = proc_if_read; 2918 pkt_dev->proc_ent->write_proc = proc_if_write; 2919 pkt_dev->proc_ent->data = (void*)(pkt_dev); 2920 pkt_dev->proc_ent->owner = THIS_MODULE; 2921 2922 return add_dev_to_thread(t, pkt_dev); 2923 } 2924 else { 2925 printk("pktgen: ERROR: interface already used.\n"); 2926 return -EBUSY; 2927 } 2928 } 2929 2930 static struct pktgen_thread *pktgen_find_thread(const char* name) 2931 { 2932 struct pktgen_thread *t = NULL; 2933 2934 thread_lock(); 2935 2936 t = pktgen_threads; 2937 while (t) { 2938 if (strcmp(t->name, name) == 0) 2939 break; 2940 2941 t = t->next; 2942 } 2943 thread_unlock(); 2944 return t; 2945 } 2946 2947 static int pktgen_create_thread(const char* name, int cpu) 2948 { 2949 struct pktgen_thread *t = NULL; 2950 2951 if (strlen(name) > 31) { 2952 printk("pktgen: ERROR: Thread name cannot be more than 31 characters.\n"); 2953 return -EINVAL; 2954 } 2955 2956 if (pktgen_find_thread(name)) { 2957 printk("pktgen: ERROR: thread: %s already exists\n", name); 2958 return -EINVAL; 2959 } 2960 2961 t = (struct pktgen_thread*)(kmalloc(sizeof(struct pktgen_thread), GFP_KERNEL)); 2962 if (!t) { 2963 printk("pktgen: ERROR: out of memory, can't create new thread.\n"); 2964 return -ENOMEM; 2965 } 2966 2967 memset(t, 0, sizeof(struct pktgen_thread)); 2968 strcpy(t->name, name); 2969 spin_lock_init(&t->if_lock); 2970 t->cpu = cpu; 2971 2972 sprintf(t->fname, "%s/%s", PG_PROC_DIR, t->name); 2973 t->proc_ent = create_proc_entry(t->fname, 0600, NULL); 2974 if (!t->proc_ent) { 2975 printk("pktgen: cannot create %s procfs entry.\n", t->fname); 2976 kfree(t); 2977 return -EINVAL; 2978 } 2979 t->proc_ent->read_proc = proc_thread_read; 2980 t->proc_ent->write_proc = proc_thread_write; 2981 t->proc_ent->data = (void*)(t); 2982 t->proc_ent->owner = THIS_MODULE; 2983 2984 t->next = pktgen_threads; 2985 pktgen_threads = t; 2986 2987 if (kernel_thread((void *) pktgen_thread_worker, (void *) t, 2988 CLONE_FS | CLONE_FILES | CLONE_SIGHAND) < 0) 2989 printk("pktgen: kernel_thread() failed for cpu %d\n", t->cpu); 2990 2991 return 0; 2992 } 2993 2994 /* 2995 * Removes a device from the thread if_list. 2996 */ 2997 static void _rem_dev_from_if_list(struct pktgen_thread *t, struct pktgen_dev *pkt_dev) 2998 { 2999 struct pktgen_dev *i, *prev = NULL; 3000 3001 i = t->if_list; 3002 3003 while(i) { 3004 if(i == pkt_dev) { 3005 if(prev) prev->next = i->next; 3006 else t->if_list = NULL; 3007 break; 3008 } 3009 prev = i; 3010 i=i->next; 3011 } 3012 } 3013 3014 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *pkt_dev) 3015 { 3016 3017 PG_DEBUG(printk("pktgen: remove_device pkt_dev=%p\n", pkt_dev)); 3018 3019 if (pkt_dev->running) { 3020 printk("pktgen:WARNING: trying to remove a running interface, stopping it now.\n"); 3021 pktgen_stop_device(pkt_dev); 3022 } 3023 3024 /* Dis-associate from the interface */ 3025 3026 if (pkt_dev->odev) { 3027 dev_put(pkt_dev->odev); 3028 pkt_dev->odev = NULL; 3029 } 3030 3031 /* And update the thread if_list */ 3032 3033 _rem_dev_from_if_list(t, pkt_dev); 3034 3035 /* Clean up proc file system */ 3036 3037 if (strlen(pkt_dev->fname)) 3038 remove_proc_entry(pkt_dev->fname, NULL); 3039 3040 if (pkt_dev->flows) 3041 vfree(pkt_dev->flows); 3042 kfree(pkt_dev); 3043 return 0; 3044 } 3045 3046 static int __init pg_init(void) 3047 { 3048 int cpu; 3049 printk(version); 3050 3051 module_fname[0] = 0; 3052 3053 create_proc_dir(); 3054 3055 sprintf(module_fname, "%s/pgctrl", PG_PROC_DIR); 3056 module_proc_ent = create_proc_entry(module_fname, 0600, NULL); 3057 if (!module_proc_ent) { 3058 printk("pktgen: ERROR: cannot create %s procfs entry.\n", module_fname); 3059 return -EINVAL; 3060 } 3061 3062 module_proc_ent->proc_fops = &pktgen_fops; 3063 module_proc_ent->data = NULL; 3064 3065 /* Register us to receive netdevice events */ 3066 register_netdevice_notifier(&pktgen_notifier_block); 3067 3068 for_each_online_cpu(cpu) { 3069 char buf[30]; 3070 3071 sprintf(buf, "kpktgend_%i", cpu); 3072 pktgen_create_thread(buf, cpu); 3073 } 3074 return 0; 3075 } 3076 3077 static void __exit pg_cleanup(void) 3078 { 3079 wait_queue_head_t queue; 3080 init_waitqueue_head(&queue); 3081 3082 /* Stop all interfaces & threads */ 3083 3084 while (pktgen_threads) { 3085 struct pktgen_thread *t = pktgen_threads; 3086 pktgen_threads->control |= (T_TERMINATE); 3087 3088 wait_event_interruptible_timeout(queue, (t != pktgen_threads), HZ); 3089 } 3090 3091 /* Un-register us from receiving netdevice events */ 3092 unregister_netdevice_notifier(&pktgen_notifier_block); 3093 3094 /* Clean up proc file system */ 3095 3096 remove_proc_entry(module_fname, NULL); 3097 3098 remove_proc_dir(); 3099 } 3100 3101 3102 module_init(pg_init); 3103 module_exit(pg_cleanup); 3104 3105 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se"); 3106 MODULE_DESCRIPTION("Packet Generator tool"); 3107 MODULE_LICENSE("GPL"); 3108 module_param(pg_count_d, int, 0); 3109 module_param(pg_delay_d, int, 0); 3110 module_param(pg_clone_skb_d, int, 0); 3111 module_param(debug, int, 0); 3112