1 /* 2 * Authors: 3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se> 4 * Uppsala University and 5 * Swedish University of Agricultural Sciences 6 * 7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> 8 * Ben Greear <greearb@candelatech.com> 9 * Jens Låås <jens.laas@data.slu.se> 10 * 11 * This program is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License 13 * as published by the Free Software Foundation; either version 14 * 2 of the License, or (at your option) any later version. 15 * 16 * 17 * A tool for loading the network with preconfigurated packets. 18 * The tool is implemented as a linux module. Parameters are output 19 * device, delay (to hard_xmit), number of packets, and whether 20 * to use multiple SKBs or just the same one. 21 * pktgen uses the installed interface's output routine. 22 * 23 * Additional hacking by: 24 * 25 * Jens.Laas@data.slu.se 26 * Improved by ANK. 010120. 27 * Improved by ANK even more. 010212. 28 * MAC address typo fixed. 010417 --ro 29 * Integrated. 020301 --DaveM 30 * Added multiskb option 020301 --DaveM 31 * Scaling of results. 020417--sigurdur@linpro.no 32 * Significant re-work of the module: 33 * * Convert to threaded model to more efficiently be able to transmit 34 * and receive on multiple interfaces at once. 35 * * Converted many counters to __u64 to allow longer runs. 36 * * Allow configuration of ranges, like min/max IP address, MACs, 37 * and UDP-ports, for both source and destination, and can 38 * set to use a random distribution or sequentially walk the range. 39 * * Can now change most values after starting. 40 * * Place 12-byte packet in UDP payload with magic number, 41 * sequence number, and timestamp. 42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and 43 * latencies (with micro-second) precision. 44 * * Add IOCTL interface to easily get counters & configuration. 45 * --Ben Greear <greearb@candelatech.com> 46 * 47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct 48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0 49 * as a "fastpath" with a configurable number of clones after alloc's. 50 * clone_skb=0 means all packets are allocated this also means ranges time 51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100 52 * clones. 53 * 54 * Also moved to /proc/net/pktgen/ 55 * --ro 56 * 57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever 58 * mistakes. Also merged in DaveM's patch in the -pre6 patch. 59 * --Ben Greear <greearb@candelatech.com> 60 * 61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br) 62 * 63 * 64 * 021124 Finished major redesign and rewrite for new functionality. 65 * See Documentation/networking/pktgen.txt for how to use this. 66 * 67 * The new operation: 68 * For each CPU one thread/process is created at start. This process checks 69 * for running devices in the if_list and sends packets until count is 0 it 70 * also the thread checks the thread->control which is used for inter-process 71 * communication. controlling process "posts" operations to the threads this 72 * way. The if_lock should be possible to remove when add/rem_device is merged 73 * into this too. 74 * 75 * By design there should only be *one* "controlling" process. In practice 76 * multiple write accesses gives unpredictable result. Understood by "write" 77 * to /proc gives result code thats should be read be the "writer". 78 * For practical use this should be no problem. 79 * 80 * Note when adding devices to a specific CPU there good idea to also assign 81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU. 82 * --ro 83 * 84 * Fix refcount off by one if first packet fails, potential null deref, 85 * memleak 030710- KJP 86 * 87 * First "ranges" functionality for ipv6 030726 --ro 88 * 89 * Included flow support. 030802 ANK. 90 * 91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org> 92 * 93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419 94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604 95 * 96 * New xmit() return, do_div and misc clean up by Stephen Hemminger 97 * <shemminger@osdl.org> 040923 98 * 99 * Randy Dunlap fixed u64 printk compiler waring 100 * 101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org> 102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213 103 * 104 * Corrections from Nikolai Malykh (nmalykh@bilim.com) 105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230 106 * 107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com> 108 * 050103 109 * 110 * MPLS support by Steven Whitehouse <steve@chygwyn.com> 111 * 112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com> 113 * 114 * Fixed src_mac command to set source mac of packet to value specified in 115 * command by Adit Ranadive <adit.262@gmail.com> 116 * 117 */ 118 #include <linux/sys.h> 119 #include <linux/types.h> 120 #include <linux/module.h> 121 #include <linux/moduleparam.h> 122 #include <linux/kernel.h> 123 #include <linux/mutex.h> 124 #include <linux/sched.h> 125 #include <linux/slab.h> 126 #include <linux/vmalloc.h> 127 #include <linux/unistd.h> 128 #include <linux/string.h> 129 #include <linux/ptrace.h> 130 #include <linux/errno.h> 131 #include <linux/ioport.h> 132 #include <linux/interrupt.h> 133 #include <linux/capability.h> 134 #include <linux/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 <linux/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 #define IP_NAME_SZ 32 174 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */ 175 #define MPLS_STACK_BOTTOM htonl(0x00000100) 176 177 /* Device flag bits */ 178 #define F_IPSRC_RND (1<<0) /* IP-Src Random */ 179 #define F_IPDST_RND (1<<1) /* IP-Dst Random */ 180 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */ 181 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */ 182 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */ 183 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */ 184 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */ 185 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */ 186 #define F_MPLS_RND (1<<8) /* Random MPLS labels */ 187 #define F_VID_RND (1<<9) /* Random VLAN ID */ 188 #define F_SVID_RND (1<<10) /* Random SVLAN ID */ 189 #define F_FLOW_SEQ (1<<11) /* Sequential flows */ 190 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */ 191 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */ 192 193 /* Thread control flag bits */ 194 #define T_TERMINATE (1<<0) 195 #define T_STOP (1<<1) /* Stop run */ 196 #define T_RUN (1<<2) /* Start run */ 197 #define T_REMDEVALL (1<<3) /* Remove all devs */ 198 #define T_REMDEV (1<<4) /* Remove one dev */ 199 200 /* If lock -- can be removed after some work */ 201 #define if_lock(t) spin_lock(&(t->if_lock)); 202 #define if_unlock(t) spin_unlock(&(t->if_lock)); 203 204 /* Used to help with determining the pkts on receive */ 205 #define PKTGEN_MAGIC 0xbe9be955 206 #define PG_PROC_DIR "pktgen" 207 #define PGCTRL "pgctrl" 208 static struct proc_dir_entry *pg_proc_dir = NULL; 209 210 #define MAX_CFLOWS 65536 211 212 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4) 213 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4) 214 215 struct flow_state { 216 __be32 cur_daddr; 217 int count; 218 #ifdef CONFIG_XFRM 219 struct xfrm_state *x; 220 #endif 221 __u32 flags; 222 }; 223 224 /* flow flag bits */ 225 #define F_INIT (1<<0) /* flow has been initialized */ 226 227 struct pktgen_dev { 228 /* 229 * Try to keep frequent/infrequent used vars. separated. 230 */ 231 struct proc_dir_entry *entry; /* proc file */ 232 struct pktgen_thread *pg_thread;/* the owner */ 233 struct list_head list; /* Used for chaining in the thread's run-queue */ 234 235 int running; /* if this changes to false, the test will stop */ 236 237 /* If min != max, then we will either do a linear iteration, or 238 * we will do a random selection from within the range. 239 */ 240 __u32 flags; 241 int removal_mark; /* non-zero => the device is marked for 242 * removal by worker thread */ 243 244 int min_pkt_size; /* = ETH_ZLEN; */ 245 int max_pkt_size; /* = ETH_ZLEN; */ 246 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */ 247 int nfrags; 248 __u32 delay_us; /* Default delay */ 249 __u32 delay_ns; 250 __u64 count; /* Default No packets to send */ 251 __u64 sofar; /* How many pkts we've sent so far */ 252 __u64 tx_bytes; /* How many bytes we've transmitted */ 253 __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */ 254 255 /* runtime counters relating to clone_skb */ 256 __u64 next_tx_us; /* timestamp of when to tx next */ 257 __u32 next_tx_ns; 258 259 __u64 allocated_skbs; 260 __u32 clone_count; 261 int last_ok; /* Was last skb sent? 262 * Or a failed transmit of some sort? This will keep 263 * sequence numbers in order, for example. 264 */ 265 __u64 started_at; /* micro-seconds */ 266 __u64 stopped_at; /* micro-seconds */ 267 __u64 idle_acc; /* micro-seconds */ 268 __u32 seq_num; 269 270 int clone_skb; /* Use multiple SKBs during packet gen. If this number 271 * is greater than 1, then that many copies of the same 272 * packet will be sent before a new packet is allocated. 273 * For instance, if you want to send 1024 identical packets 274 * before creating a new packet, set clone_skb to 1024. 275 */ 276 277 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 278 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 279 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 280 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 281 282 struct in6_addr in6_saddr; 283 struct in6_addr in6_daddr; 284 struct in6_addr cur_in6_daddr; 285 struct in6_addr cur_in6_saddr; 286 /* For ranges */ 287 struct in6_addr min_in6_daddr; 288 struct in6_addr max_in6_daddr; 289 struct in6_addr min_in6_saddr; 290 struct in6_addr max_in6_saddr; 291 292 /* If we're doing ranges, random or incremental, then this 293 * defines the min/max for those ranges. 294 */ 295 __be32 saddr_min; /* inclusive, source IP address */ 296 __be32 saddr_max; /* exclusive, source IP address */ 297 __be32 daddr_min; /* inclusive, dest IP address */ 298 __be32 daddr_max; /* exclusive, dest IP address */ 299 300 __u16 udp_src_min; /* inclusive, source UDP port */ 301 __u16 udp_src_max; /* exclusive, source UDP port */ 302 __u16 udp_dst_min; /* inclusive, dest UDP port */ 303 __u16 udp_dst_max; /* exclusive, dest UDP port */ 304 305 /* DSCP + ECN */ 306 __u8 tos; /* six most significant bits of (former) IPv4 TOS are for dscp codepoint */ 307 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 (see RFC 3260, sec. 4) */ 308 309 /* MPLS */ 310 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */ 311 __be32 labels[MAX_MPLS_LABELS]; 312 313 /* VLAN/SVLAN (802.1Q/Q-in-Q) */ 314 __u8 vlan_p; 315 __u8 vlan_cfi; 316 __u16 vlan_id; /* 0xffff means no vlan tag */ 317 318 __u8 svlan_p; 319 __u8 svlan_cfi; 320 __u16 svlan_id; /* 0xffff means no svlan tag */ 321 322 __u32 src_mac_count; /* How many MACs to iterate through */ 323 __u32 dst_mac_count; /* How many MACs to iterate through */ 324 325 unsigned char dst_mac[ETH_ALEN]; 326 unsigned char src_mac[ETH_ALEN]; 327 328 __u32 cur_dst_mac_offset; 329 __u32 cur_src_mac_offset; 330 __be32 cur_saddr; 331 __be32 cur_daddr; 332 __u16 cur_udp_dst; 333 __u16 cur_udp_src; 334 __u16 cur_queue_map; 335 __u32 cur_pkt_size; 336 337 __u8 hh[14]; 338 /* = { 339 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, 340 341 We fill in SRC address later 342 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 343 0x08, 0x00 344 }; 345 */ 346 __u16 pad; /* pad out the hh struct to an even 16 bytes */ 347 348 struct sk_buff *skb; /* skb we are to transmit next, mainly used for when we 349 * are transmitting the same one multiple times 350 */ 351 struct net_device *odev; /* The out-going device. Note that the device should 352 * have it's pg_info pointer pointing back to this 353 * device. This will be set when the user specifies 354 * the out-going device name (not when the inject is 355 * started as it used to do.) 356 */ 357 struct flow_state *flows; 358 unsigned cflows; /* Concurrent flows (config) */ 359 unsigned lflow; /* Flow length (config) */ 360 unsigned nflows; /* accumulated flows (stats) */ 361 unsigned curfl; /* current sequenced flow (state)*/ 362 363 u16 queue_map_min; 364 u16 queue_map_max; 365 366 #ifdef CONFIG_XFRM 367 __u8 ipsmode; /* IPSEC mode (config) */ 368 __u8 ipsproto; /* IPSEC type (config) */ 369 #endif 370 char result[512]; 371 }; 372 373 struct pktgen_hdr { 374 __be32 pgh_magic; 375 __be32 seq_num; 376 __be32 tv_sec; 377 __be32 tv_usec; 378 }; 379 380 struct pktgen_thread { 381 spinlock_t if_lock; 382 struct list_head if_list; /* All device here */ 383 struct list_head th_list; 384 struct task_struct *tsk; 385 char result[512]; 386 387 /* Field for thread to receive "posted" events terminate, stop ifs etc. */ 388 389 u32 control; 390 int cpu; 391 392 wait_queue_head_t queue; 393 }; 394 395 #define REMOVE 1 396 #define FIND 0 397 398 /** Convert to micro-seconds */ 399 static inline __u64 tv_to_us(const struct timeval *tv) 400 { 401 __u64 us = tv->tv_usec; 402 us += (__u64) tv->tv_sec * (__u64) 1000000; 403 return us; 404 } 405 406 static __u64 getCurUs(void) 407 { 408 struct timeval tv; 409 do_gettimeofday(&tv); 410 return tv_to_us(&tv); 411 } 412 413 /* old include end */ 414 415 static char version[] __initdata = VERSION; 416 417 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i); 418 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname); 419 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 420 const char *ifname); 421 static int pktgen_device_event(struct notifier_block *, unsigned long, void *); 422 static void pktgen_run_all_threads(void); 423 static void pktgen_stop_all_threads_ifs(void); 424 static int pktgen_stop_device(struct pktgen_dev *pkt_dev); 425 static void pktgen_stop(struct pktgen_thread *t); 426 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); 427 428 static unsigned int scan_ip6(const char *s, char ip[16]); 429 static unsigned int fmt_ip6(char *s, const char ip[16]); 430 431 /* Module parameters, defaults. */ 432 static int pg_count_d = 1000; /* 1000 pkts by default */ 433 static int pg_delay_d; 434 static int pg_clone_skb_d; 435 static int debug; 436 437 static DEFINE_MUTEX(pktgen_thread_lock); 438 static LIST_HEAD(pktgen_threads); 439 440 static struct notifier_block pktgen_notifier_block = { 441 .notifier_call = pktgen_device_event, 442 }; 443 444 /* 445 * /proc handling functions 446 * 447 */ 448 449 static int pgctrl_show(struct seq_file *seq, void *v) 450 { 451 seq_puts(seq, VERSION); 452 return 0; 453 } 454 455 static ssize_t pgctrl_write(struct file *file, const char __user * buf, 456 size_t count, loff_t * ppos) 457 { 458 int err = 0; 459 char data[128]; 460 461 if (!capable(CAP_NET_ADMIN)) { 462 err = -EPERM; 463 goto out; 464 } 465 466 if (count > sizeof(data)) 467 count = sizeof(data); 468 469 if (copy_from_user(data, buf, count)) { 470 err = -EFAULT; 471 goto out; 472 } 473 data[count - 1] = 0; /* Make string */ 474 475 if (!strcmp(data, "stop")) 476 pktgen_stop_all_threads_ifs(); 477 478 else if (!strcmp(data, "start")) 479 pktgen_run_all_threads(); 480 481 else 482 printk(KERN_WARNING "pktgen: Unknown command: %s\n", data); 483 484 err = count; 485 486 out: 487 return err; 488 } 489 490 static int pgctrl_open(struct inode *inode, struct file *file) 491 { 492 return single_open(file, pgctrl_show, PDE(inode)->data); 493 } 494 495 static const struct file_operations pktgen_fops = { 496 .owner = THIS_MODULE, 497 .open = pgctrl_open, 498 .read = seq_read, 499 .llseek = seq_lseek, 500 .write = pgctrl_write, 501 .release = single_release, 502 }; 503 504 static int pktgen_if_show(struct seq_file *seq, void *v) 505 { 506 struct pktgen_dev *pkt_dev = seq->private; 507 __u64 sa; 508 __u64 stopped; 509 __u64 now = getCurUs(); 510 DECLARE_MAC_BUF(mac); 511 512 seq_printf(seq, 513 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", 514 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, 515 pkt_dev->max_pkt_size); 516 517 seq_printf(seq, 518 " frags: %d delay: %u clone_skb: %d ifname: %s\n", 519 pkt_dev->nfrags, 520 1000 * pkt_dev->delay_us + pkt_dev->delay_ns, 521 pkt_dev->clone_skb, pkt_dev->odev->name); 522 523 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, 524 pkt_dev->lflow); 525 526 seq_printf(seq, 527 " queue_map_min: %u queue_map_max: %u\n", 528 pkt_dev->queue_map_min, 529 pkt_dev->queue_map_max); 530 531 if (pkt_dev->flags & F_IPV6) { 532 char b1[128], b2[128], b3[128]; 533 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr); 534 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr); 535 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr); 536 seq_printf(seq, 537 " saddr: %s min_saddr: %s max_saddr: %s\n", b1, 538 b2, b3); 539 540 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr); 541 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr); 542 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr); 543 seq_printf(seq, 544 " daddr: %s min_daddr: %s max_daddr: %s\n", b1, 545 b2, b3); 546 547 } else 548 seq_printf(seq, 549 " dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n", 550 pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min, 551 pkt_dev->src_max); 552 553 seq_puts(seq, " src_mac: "); 554 555 seq_printf(seq, "%s ", 556 print_mac(mac, is_zero_ether_addr(pkt_dev->src_mac) ? 557 pkt_dev->odev->dev_addr : pkt_dev->src_mac)); 558 559 seq_printf(seq, "dst_mac: "); 560 seq_printf(seq, "%s\n", print_mac(mac, pkt_dev->dst_mac)); 561 562 seq_printf(seq, 563 " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n", 564 pkt_dev->udp_src_min, pkt_dev->udp_src_max, 565 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); 566 567 seq_printf(seq, 568 " src_mac_count: %d dst_mac_count: %d\n", 569 pkt_dev->src_mac_count, pkt_dev->dst_mac_count); 570 571 if (pkt_dev->nr_labels) { 572 unsigned i; 573 seq_printf(seq, " mpls: "); 574 for (i = 0; i < pkt_dev->nr_labels; i++) 575 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), 576 i == pkt_dev->nr_labels-1 ? "\n" : ", "); 577 } 578 579 if (pkt_dev->vlan_id != 0xffff) { 580 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", 581 pkt_dev->vlan_id, pkt_dev->vlan_p, pkt_dev->vlan_cfi); 582 } 583 584 if (pkt_dev->svlan_id != 0xffff) { 585 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", 586 pkt_dev->svlan_id, pkt_dev->svlan_p, pkt_dev->svlan_cfi); 587 } 588 589 if (pkt_dev->tos) { 590 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); 591 } 592 593 if (pkt_dev->traffic_class) { 594 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); 595 } 596 597 seq_printf(seq, " Flags: "); 598 599 if (pkt_dev->flags & F_IPV6) 600 seq_printf(seq, "IPV6 "); 601 602 if (pkt_dev->flags & F_IPSRC_RND) 603 seq_printf(seq, "IPSRC_RND "); 604 605 if (pkt_dev->flags & F_IPDST_RND) 606 seq_printf(seq, "IPDST_RND "); 607 608 if (pkt_dev->flags & F_TXSIZE_RND) 609 seq_printf(seq, "TXSIZE_RND "); 610 611 if (pkt_dev->flags & F_UDPSRC_RND) 612 seq_printf(seq, "UDPSRC_RND "); 613 614 if (pkt_dev->flags & F_UDPDST_RND) 615 seq_printf(seq, "UDPDST_RND "); 616 617 if (pkt_dev->flags & F_MPLS_RND) 618 seq_printf(seq, "MPLS_RND "); 619 620 if (pkt_dev->flags & F_QUEUE_MAP_RND) 621 seq_printf(seq, "QUEUE_MAP_RND "); 622 623 if (pkt_dev->cflows) { 624 if (pkt_dev->flags & F_FLOW_SEQ) 625 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/ 626 else 627 seq_printf(seq, "FLOW_RND "); 628 } 629 630 #ifdef CONFIG_XFRM 631 if (pkt_dev->flags & F_IPSEC_ON) 632 seq_printf(seq, "IPSEC "); 633 #endif 634 635 if (pkt_dev->flags & F_MACSRC_RND) 636 seq_printf(seq, "MACSRC_RND "); 637 638 if (pkt_dev->flags & F_MACDST_RND) 639 seq_printf(seq, "MACDST_RND "); 640 641 if (pkt_dev->flags & F_VID_RND) 642 seq_printf(seq, "VID_RND "); 643 644 if (pkt_dev->flags & F_SVID_RND) 645 seq_printf(seq, "SVID_RND "); 646 647 seq_puts(seq, "\n"); 648 649 sa = pkt_dev->started_at; 650 stopped = pkt_dev->stopped_at; 651 if (pkt_dev->running) 652 stopped = now; /* not really stopped, more like last-running-at */ 653 654 seq_printf(seq, 655 "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n", 656 (unsigned long long)pkt_dev->sofar, 657 (unsigned long long)pkt_dev->errors, (unsigned long long)sa, 658 (unsigned long long)stopped, 659 (unsigned long long)pkt_dev->idle_acc); 660 661 seq_printf(seq, 662 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 663 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, 664 pkt_dev->cur_src_mac_offset); 665 666 if (pkt_dev->flags & F_IPV6) { 667 char b1[128], b2[128]; 668 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr); 669 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr); 670 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1); 671 } else 672 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n", 673 pkt_dev->cur_saddr, pkt_dev->cur_daddr); 674 675 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", 676 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 677 678 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); 679 680 seq_printf(seq, " flows: %u\n", pkt_dev->nflows); 681 682 if (pkt_dev->result[0]) 683 seq_printf(seq, "Result: %s\n", pkt_dev->result); 684 else 685 seq_printf(seq, "Result: Idle\n"); 686 687 return 0; 688 } 689 690 691 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, __u32 *num) 692 { 693 int i = 0; 694 *num = 0; 695 696 for (; i < maxlen; i++) { 697 char c; 698 *num <<= 4; 699 if (get_user(c, &user_buffer[i])) 700 return -EFAULT; 701 if ((c >= '0') && (c <= '9')) 702 *num |= c - '0'; 703 else if ((c >= 'a') && (c <= 'f')) 704 *num |= c - 'a' + 10; 705 else if ((c >= 'A') && (c <= 'F')) 706 *num |= c - 'A' + 10; 707 else 708 break; 709 } 710 return i; 711 } 712 713 static int count_trail_chars(const char __user * user_buffer, 714 unsigned int maxlen) 715 { 716 int i; 717 718 for (i = 0; i < maxlen; i++) { 719 char c; 720 if (get_user(c, &user_buffer[i])) 721 return -EFAULT; 722 switch (c) { 723 case '\"': 724 case '\n': 725 case '\r': 726 case '\t': 727 case ' ': 728 case '=': 729 break; 730 default: 731 goto done; 732 } 733 } 734 done: 735 return i; 736 } 737 738 static unsigned long num_arg(const char __user * user_buffer, 739 unsigned long maxlen, unsigned long *num) 740 { 741 int i = 0; 742 *num = 0; 743 744 for (; i < maxlen; i++) { 745 char c; 746 if (get_user(c, &user_buffer[i])) 747 return -EFAULT; 748 if ((c >= '0') && (c <= '9')) { 749 *num *= 10; 750 *num += c - '0'; 751 } else 752 break; 753 } 754 return i; 755 } 756 757 static int strn_len(const char __user * user_buffer, unsigned int maxlen) 758 { 759 int i = 0; 760 761 for (; i < maxlen; i++) { 762 char c; 763 if (get_user(c, &user_buffer[i])) 764 return -EFAULT; 765 switch (c) { 766 case '\"': 767 case '\n': 768 case '\r': 769 case '\t': 770 case ' ': 771 goto done_str; 772 break; 773 default: 774 break; 775 } 776 } 777 done_str: 778 return i; 779 } 780 781 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) 782 { 783 unsigned n = 0; 784 char c; 785 ssize_t i = 0; 786 int len; 787 788 pkt_dev->nr_labels = 0; 789 do { 790 __u32 tmp; 791 len = hex32_arg(&buffer[i], 8, &tmp); 792 if (len <= 0) 793 return len; 794 pkt_dev->labels[n] = htonl(tmp); 795 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 796 pkt_dev->flags |= F_MPLS_RND; 797 i += len; 798 if (get_user(c, &buffer[i])) 799 return -EFAULT; 800 i++; 801 n++; 802 if (n >= MAX_MPLS_LABELS) 803 return -E2BIG; 804 } while (c == ','); 805 806 pkt_dev->nr_labels = n; 807 return i; 808 } 809 810 static ssize_t pktgen_if_write(struct file *file, 811 const char __user * user_buffer, size_t count, 812 loff_t * offset) 813 { 814 struct seq_file *seq = (struct seq_file *)file->private_data; 815 struct pktgen_dev *pkt_dev = seq->private; 816 int i = 0, max, len; 817 char name[16], valstr[32]; 818 unsigned long value = 0; 819 char *pg_result = NULL; 820 int tmp = 0; 821 char buf[128]; 822 823 pg_result = &(pkt_dev->result[0]); 824 825 if (count < 1) { 826 printk(KERN_WARNING "pktgen: wrong command format\n"); 827 return -EINVAL; 828 } 829 830 max = count - i; 831 tmp = count_trail_chars(&user_buffer[i], max); 832 if (tmp < 0) { 833 printk(KERN_WARNING "pktgen: illegal format\n"); 834 return tmp; 835 } 836 i += tmp; 837 838 /* Read variable name */ 839 840 len = strn_len(&user_buffer[i], sizeof(name) - 1); 841 if (len < 0) { 842 return len; 843 } 844 memset(name, 0, sizeof(name)); 845 if (copy_from_user(name, &user_buffer[i], len)) 846 return -EFAULT; 847 i += len; 848 849 max = count - i; 850 len = count_trail_chars(&user_buffer[i], max); 851 if (len < 0) 852 return len; 853 854 i += len; 855 856 if (debug) { 857 char tb[count + 1]; 858 if (copy_from_user(tb, user_buffer, count)) 859 return -EFAULT; 860 tb[count] = 0; 861 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name, 862 (unsigned long)count, tb); 863 } 864 865 if (!strcmp(name, "min_pkt_size")) { 866 len = num_arg(&user_buffer[i], 10, &value); 867 if (len < 0) { 868 return len; 869 } 870 i += len; 871 if (value < 14 + 20 + 8) 872 value = 14 + 20 + 8; 873 if (value != pkt_dev->min_pkt_size) { 874 pkt_dev->min_pkt_size = value; 875 pkt_dev->cur_pkt_size = value; 876 } 877 sprintf(pg_result, "OK: min_pkt_size=%u", 878 pkt_dev->min_pkt_size); 879 return count; 880 } 881 882 if (!strcmp(name, "max_pkt_size")) { 883 len = num_arg(&user_buffer[i], 10, &value); 884 if (len < 0) { 885 return len; 886 } 887 i += len; 888 if (value < 14 + 20 + 8) 889 value = 14 + 20 + 8; 890 if (value != pkt_dev->max_pkt_size) { 891 pkt_dev->max_pkt_size = value; 892 pkt_dev->cur_pkt_size = value; 893 } 894 sprintf(pg_result, "OK: max_pkt_size=%u", 895 pkt_dev->max_pkt_size); 896 return count; 897 } 898 899 /* Shortcut for min = max */ 900 901 if (!strcmp(name, "pkt_size")) { 902 len = num_arg(&user_buffer[i], 10, &value); 903 if (len < 0) { 904 return len; 905 } 906 i += len; 907 if (value < 14 + 20 + 8) 908 value = 14 + 20 + 8; 909 if (value != pkt_dev->min_pkt_size) { 910 pkt_dev->min_pkt_size = value; 911 pkt_dev->max_pkt_size = value; 912 pkt_dev->cur_pkt_size = value; 913 } 914 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 915 return count; 916 } 917 918 if (!strcmp(name, "debug")) { 919 len = num_arg(&user_buffer[i], 10, &value); 920 if (len < 0) { 921 return len; 922 } 923 i += len; 924 debug = value; 925 sprintf(pg_result, "OK: debug=%u", debug); 926 return count; 927 } 928 929 if (!strcmp(name, "frags")) { 930 len = num_arg(&user_buffer[i], 10, &value); 931 if (len < 0) { 932 return len; 933 } 934 i += len; 935 pkt_dev->nfrags = value; 936 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 937 return count; 938 } 939 if (!strcmp(name, "delay")) { 940 len = num_arg(&user_buffer[i], 10, &value); 941 if (len < 0) { 942 return len; 943 } 944 i += len; 945 if (value == 0x7FFFFFFF) { 946 pkt_dev->delay_us = 0x7FFFFFFF; 947 pkt_dev->delay_ns = 0; 948 } else { 949 pkt_dev->delay_us = value / 1000; 950 pkt_dev->delay_ns = value % 1000; 951 } 952 sprintf(pg_result, "OK: delay=%u", 953 1000 * pkt_dev->delay_us + pkt_dev->delay_ns); 954 return count; 955 } 956 if (!strcmp(name, "udp_src_min")) { 957 len = num_arg(&user_buffer[i], 10, &value); 958 if (len < 0) { 959 return len; 960 } 961 i += len; 962 if (value != pkt_dev->udp_src_min) { 963 pkt_dev->udp_src_min = value; 964 pkt_dev->cur_udp_src = value; 965 } 966 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 967 return count; 968 } 969 if (!strcmp(name, "udp_dst_min")) { 970 len = num_arg(&user_buffer[i], 10, &value); 971 if (len < 0) { 972 return len; 973 } 974 i += len; 975 if (value != pkt_dev->udp_dst_min) { 976 pkt_dev->udp_dst_min = value; 977 pkt_dev->cur_udp_dst = value; 978 } 979 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 980 return count; 981 } 982 if (!strcmp(name, "udp_src_max")) { 983 len = num_arg(&user_buffer[i], 10, &value); 984 if (len < 0) { 985 return len; 986 } 987 i += len; 988 if (value != pkt_dev->udp_src_max) { 989 pkt_dev->udp_src_max = value; 990 pkt_dev->cur_udp_src = value; 991 } 992 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 993 return count; 994 } 995 if (!strcmp(name, "udp_dst_max")) { 996 len = num_arg(&user_buffer[i], 10, &value); 997 if (len < 0) { 998 return len; 999 } 1000 i += len; 1001 if (value != pkt_dev->udp_dst_max) { 1002 pkt_dev->udp_dst_max = value; 1003 pkt_dev->cur_udp_dst = value; 1004 } 1005 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1006 return count; 1007 } 1008 if (!strcmp(name, "clone_skb")) { 1009 len = num_arg(&user_buffer[i], 10, &value); 1010 if (len < 0) { 1011 return len; 1012 } 1013 i += len; 1014 pkt_dev->clone_skb = value; 1015 1016 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1017 return count; 1018 } 1019 if (!strcmp(name, "count")) { 1020 len = num_arg(&user_buffer[i], 10, &value); 1021 if (len < 0) { 1022 return len; 1023 } 1024 i += len; 1025 pkt_dev->count = value; 1026 sprintf(pg_result, "OK: count=%llu", 1027 (unsigned long long)pkt_dev->count); 1028 return count; 1029 } 1030 if (!strcmp(name, "src_mac_count")) { 1031 len = num_arg(&user_buffer[i], 10, &value); 1032 if (len < 0) { 1033 return len; 1034 } 1035 i += len; 1036 if (pkt_dev->src_mac_count != value) { 1037 pkt_dev->src_mac_count = value; 1038 pkt_dev->cur_src_mac_offset = 0; 1039 } 1040 sprintf(pg_result, "OK: src_mac_count=%d", 1041 pkt_dev->src_mac_count); 1042 return count; 1043 } 1044 if (!strcmp(name, "dst_mac_count")) { 1045 len = num_arg(&user_buffer[i], 10, &value); 1046 if (len < 0) { 1047 return len; 1048 } 1049 i += len; 1050 if (pkt_dev->dst_mac_count != value) { 1051 pkt_dev->dst_mac_count = value; 1052 pkt_dev->cur_dst_mac_offset = 0; 1053 } 1054 sprintf(pg_result, "OK: dst_mac_count=%d", 1055 pkt_dev->dst_mac_count); 1056 return count; 1057 } 1058 if (!strcmp(name, "flag")) { 1059 char f[32]; 1060 memset(f, 0, 32); 1061 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1062 if (len < 0) { 1063 return len; 1064 } 1065 if (copy_from_user(f, &user_buffer[i], len)) 1066 return -EFAULT; 1067 i += len; 1068 if (strcmp(f, "IPSRC_RND") == 0) 1069 pkt_dev->flags |= F_IPSRC_RND; 1070 1071 else if (strcmp(f, "!IPSRC_RND") == 0) 1072 pkt_dev->flags &= ~F_IPSRC_RND; 1073 1074 else if (strcmp(f, "TXSIZE_RND") == 0) 1075 pkt_dev->flags |= F_TXSIZE_RND; 1076 1077 else if (strcmp(f, "!TXSIZE_RND") == 0) 1078 pkt_dev->flags &= ~F_TXSIZE_RND; 1079 1080 else if (strcmp(f, "IPDST_RND") == 0) 1081 pkt_dev->flags |= F_IPDST_RND; 1082 1083 else if (strcmp(f, "!IPDST_RND") == 0) 1084 pkt_dev->flags &= ~F_IPDST_RND; 1085 1086 else if (strcmp(f, "UDPSRC_RND") == 0) 1087 pkt_dev->flags |= F_UDPSRC_RND; 1088 1089 else if (strcmp(f, "!UDPSRC_RND") == 0) 1090 pkt_dev->flags &= ~F_UDPSRC_RND; 1091 1092 else if (strcmp(f, "UDPDST_RND") == 0) 1093 pkt_dev->flags |= F_UDPDST_RND; 1094 1095 else if (strcmp(f, "!UDPDST_RND") == 0) 1096 pkt_dev->flags &= ~F_UDPDST_RND; 1097 1098 else if (strcmp(f, "MACSRC_RND") == 0) 1099 pkt_dev->flags |= F_MACSRC_RND; 1100 1101 else if (strcmp(f, "!MACSRC_RND") == 0) 1102 pkt_dev->flags &= ~F_MACSRC_RND; 1103 1104 else if (strcmp(f, "MACDST_RND") == 0) 1105 pkt_dev->flags |= F_MACDST_RND; 1106 1107 else if (strcmp(f, "!MACDST_RND") == 0) 1108 pkt_dev->flags &= ~F_MACDST_RND; 1109 1110 else if (strcmp(f, "MPLS_RND") == 0) 1111 pkt_dev->flags |= F_MPLS_RND; 1112 1113 else if (strcmp(f, "!MPLS_RND") == 0) 1114 pkt_dev->flags &= ~F_MPLS_RND; 1115 1116 else if (strcmp(f, "VID_RND") == 0) 1117 pkt_dev->flags |= F_VID_RND; 1118 1119 else if (strcmp(f, "!VID_RND") == 0) 1120 pkt_dev->flags &= ~F_VID_RND; 1121 1122 else if (strcmp(f, "SVID_RND") == 0) 1123 pkt_dev->flags |= F_SVID_RND; 1124 1125 else if (strcmp(f, "!SVID_RND") == 0) 1126 pkt_dev->flags &= ~F_SVID_RND; 1127 1128 else if (strcmp(f, "FLOW_SEQ") == 0) 1129 pkt_dev->flags |= F_FLOW_SEQ; 1130 1131 else if (strcmp(f, "QUEUE_MAP_RND") == 0) 1132 pkt_dev->flags |= F_QUEUE_MAP_RND; 1133 1134 else if (strcmp(f, "!QUEUE_MAP_RND") == 0) 1135 pkt_dev->flags &= ~F_QUEUE_MAP_RND; 1136 #ifdef CONFIG_XFRM 1137 else if (strcmp(f, "IPSEC") == 0) 1138 pkt_dev->flags |= F_IPSEC_ON; 1139 #endif 1140 1141 else if (strcmp(f, "!IPV6") == 0) 1142 pkt_dev->flags &= ~F_IPV6; 1143 1144 else { 1145 sprintf(pg_result, 1146 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1147 f, 1148 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1149 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC\n"); 1150 return count; 1151 } 1152 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1153 return count; 1154 } 1155 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1156 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1157 if (len < 0) { 1158 return len; 1159 } 1160 1161 if (copy_from_user(buf, &user_buffer[i], len)) 1162 return -EFAULT; 1163 buf[len] = 0; 1164 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1165 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1166 strncpy(pkt_dev->dst_min, buf, len); 1167 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1168 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1169 } 1170 if (debug) 1171 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n", 1172 pkt_dev->dst_min); 1173 i += len; 1174 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1175 return count; 1176 } 1177 if (!strcmp(name, "dst_max")) { 1178 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1179 if (len < 0) { 1180 return len; 1181 } 1182 1183 if (copy_from_user(buf, &user_buffer[i], len)) 1184 return -EFAULT; 1185 1186 buf[len] = 0; 1187 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1188 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1189 strncpy(pkt_dev->dst_max, buf, len); 1190 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1191 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1192 } 1193 if (debug) 1194 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n", 1195 pkt_dev->dst_max); 1196 i += len; 1197 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1198 return count; 1199 } 1200 if (!strcmp(name, "dst6")) { 1201 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1202 if (len < 0) 1203 return len; 1204 1205 pkt_dev->flags |= F_IPV6; 1206 1207 if (copy_from_user(buf, &user_buffer[i], len)) 1208 return -EFAULT; 1209 buf[len] = 0; 1210 1211 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1212 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1213 1214 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr); 1215 1216 if (debug) 1217 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf); 1218 1219 i += len; 1220 sprintf(pg_result, "OK: dst6=%s", buf); 1221 return count; 1222 } 1223 if (!strcmp(name, "dst6_min")) { 1224 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1225 if (len < 0) 1226 return len; 1227 1228 pkt_dev->flags |= F_IPV6; 1229 1230 if (copy_from_user(buf, &user_buffer[i], len)) 1231 return -EFAULT; 1232 buf[len] = 0; 1233 1234 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1235 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1236 1237 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, 1238 &pkt_dev->min_in6_daddr); 1239 if (debug) 1240 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf); 1241 1242 i += len; 1243 sprintf(pg_result, "OK: dst6_min=%s", buf); 1244 return count; 1245 } 1246 if (!strcmp(name, "dst6_max")) { 1247 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1248 if (len < 0) 1249 return len; 1250 1251 pkt_dev->flags |= F_IPV6; 1252 1253 if (copy_from_user(buf, &user_buffer[i], len)) 1254 return -EFAULT; 1255 buf[len] = 0; 1256 1257 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1258 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1259 1260 if (debug) 1261 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf); 1262 1263 i += len; 1264 sprintf(pg_result, "OK: dst6_max=%s", buf); 1265 return count; 1266 } 1267 if (!strcmp(name, "src6")) { 1268 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1269 if (len < 0) 1270 return len; 1271 1272 pkt_dev->flags |= F_IPV6; 1273 1274 if (copy_from_user(buf, &user_buffer[i], len)) 1275 return -EFAULT; 1276 buf[len] = 0; 1277 1278 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1279 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1280 1281 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr); 1282 1283 if (debug) 1284 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf); 1285 1286 i += len; 1287 sprintf(pg_result, "OK: src6=%s", buf); 1288 return count; 1289 } 1290 if (!strcmp(name, "src_min")) { 1291 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1292 if (len < 0) { 1293 return len; 1294 } 1295 if (copy_from_user(buf, &user_buffer[i], len)) 1296 return -EFAULT; 1297 buf[len] = 0; 1298 if (strcmp(buf, pkt_dev->src_min) != 0) { 1299 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1300 strncpy(pkt_dev->src_min, buf, len); 1301 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1302 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1303 } 1304 if (debug) 1305 printk(KERN_DEBUG "pktgen: src_min set to: %s\n", 1306 pkt_dev->src_min); 1307 i += len; 1308 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1309 return count; 1310 } 1311 if (!strcmp(name, "src_max")) { 1312 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1313 if (len < 0) { 1314 return len; 1315 } 1316 if (copy_from_user(buf, &user_buffer[i], len)) 1317 return -EFAULT; 1318 buf[len] = 0; 1319 if (strcmp(buf, pkt_dev->src_max) != 0) { 1320 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1321 strncpy(pkt_dev->src_max, buf, len); 1322 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1323 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1324 } 1325 if (debug) 1326 printk(KERN_DEBUG "pktgen: src_max set to: %s\n", 1327 pkt_dev->src_max); 1328 i += len; 1329 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1330 return count; 1331 } 1332 if (!strcmp(name, "dst_mac")) { 1333 char *v = valstr; 1334 unsigned char old_dmac[ETH_ALEN]; 1335 unsigned char *m = pkt_dev->dst_mac; 1336 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN); 1337 1338 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1339 if (len < 0) { 1340 return len; 1341 } 1342 memset(valstr, 0, sizeof(valstr)); 1343 if (copy_from_user(valstr, &user_buffer[i], len)) 1344 return -EFAULT; 1345 i += len; 1346 1347 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) { 1348 if (*v >= '0' && *v <= '9') { 1349 *m *= 16; 1350 *m += *v - '0'; 1351 } 1352 if (*v >= 'A' && *v <= 'F') { 1353 *m *= 16; 1354 *m += *v - 'A' + 10; 1355 } 1356 if (*v >= 'a' && *v <= 'f') { 1357 *m *= 16; 1358 *m += *v - 'a' + 10; 1359 } 1360 if (*v == ':') { 1361 m++; 1362 *m = 0; 1363 } 1364 } 1365 1366 /* Set up Dest MAC */ 1367 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac)) 1368 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 1369 1370 sprintf(pg_result, "OK: dstmac"); 1371 return count; 1372 } 1373 if (!strcmp(name, "src_mac")) { 1374 char *v = valstr; 1375 unsigned char old_smac[ETH_ALEN]; 1376 unsigned char *m = pkt_dev->src_mac; 1377 1378 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN); 1379 1380 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1381 if (len < 0) { 1382 return len; 1383 } 1384 memset(valstr, 0, sizeof(valstr)); 1385 if (copy_from_user(valstr, &user_buffer[i], len)) 1386 return -EFAULT; 1387 i += len; 1388 1389 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) { 1390 if (*v >= '0' && *v <= '9') { 1391 *m *= 16; 1392 *m += *v - '0'; 1393 } 1394 if (*v >= 'A' && *v <= 'F') { 1395 *m *= 16; 1396 *m += *v - 'A' + 10; 1397 } 1398 if (*v >= 'a' && *v <= 'f') { 1399 *m *= 16; 1400 *m += *v - 'a' + 10; 1401 } 1402 if (*v == ':') { 1403 m++; 1404 *m = 0; 1405 } 1406 } 1407 1408 /* Set up Src MAC */ 1409 if (compare_ether_addr(old_smac, pkt_dev->src_mac)) 1410 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN); 1411 1412 sprintf(pg_result, "OK: srcmac"); 1413 return count; 1414 } 1415 1416 if (!strcmp(name, "clear_counters")) { 1417 pktgen_clear_counters(pkt_dev); 1418 sprintf(pg_result, "OK: Clearing counters.\n"); 1419 return count; 1420 } 1421 1422 if (!strcmp(name, "flows")) { 1423 len = num_arg(&user_buffer[i], 10, &value); 1424 if (len < 0) { 1425 return len; 1426 } 1427 i += len; 1428 if (value > MAX_CFLOWS) 1429 value = MAX_CFLOWS; 1430 1431 pkt_dev->cflows = value; 1432 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1433 return count; 1434 } 1435 1436 if (!strcmp(name, "flowlen")) { 1437 len = num_arg(&user_buffer[i], 10, &value); 1438 if (len < 0) { 1439 return len; 1440 } 1441 i += len; 1442 pkt_dev->lflow = value; 1443 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1444 return count; 1445 } 1446 1447 if (!strcmp(name, "queue_map_min")) { 1448 len = num_arg(&user_buffer[i], 5, &value); 1449 if (len < 0) { 1450 return len; 1451 } 1452 i += len; 1453 pkt_dev->queue_map_min = value; 1454 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1455 return count; 1456 } 1457 1458 if (!strcmp(name, "queue_map_max")) { 1459 len = num_arg(&user_buffer[i], 5, &value); 1460 if (len < 0) { 1461 return len; 1462 } 1463 i += len; 1464 pkt_dev->queue_map_max = value; 1465 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1466 return count; 1467 } 1468 1469 if (!strcmp(name, "mpls")) { 1470 unsigned n, cnt; 1471 1472 len = get_labels(&user_buffer[i], pkt_dev); 1473 if (len < 0) 1474 return len; 1475 i += len; 1476 cnt = sprintf(pg_result, "OK: mpls="); 1477 for (n = 0; n < pkt_dev->nr_labels; n++) 1478 cnt += sprintf(pg_result + cnt, 1479 "%08x%s", ntohl(pkt_dev->labels[n]), 1480 n == pkt_dev->nr_labels-1 ? "" : ","); 1481 1482 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1483 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1484 pkt_dev->svlan_id = 0xffff; 1485 1486 if (debug) 1487 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n"); 1488 } 1489 return count; 1490 } 1491 1492 if (!strcmp(name, "vlan_id")) { 1493 len = num_arg(&user_buffer[i], 4, &value); 1494 if (len < 0) { 1495 return len; 1496 } 1497 i += len; 1498 if (value <= 4095) { 1499 pkt_dev->vlan_id = value; /* turn on VLAN */ 1500 1501 if (debug) 1502 printk(KERN_DEBUG "pktgen: VLAN turned on\n"); 1503 1504 if (debug && pkt_dev->nr_labels) 1505 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1506 1507 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1508 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1509 } else { 1510 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1511 pkt_dev->svlan_id = 0xffff; 1512 1513 if (debug) 1514 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1515 } 1516 return count; 1517 } 1518 1519 if (!strcmp(name, "vlan_p")) { 1520 len = num_arg(&user_buffer[i], 1, &value); 1521 if (len < 0) { 1522 return len; 1523 } 1524 i += len; 1525 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1526 pkt_dev->vlan_p = value; 1527 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1528 } else { 1529 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1530 } 1531 return count; 1532 } 1533 1534 if (!strcmp(name, "vlan_cfi")) { 1535 len = num_arg(&user_buffer[i], 1, &value); 1536 if (len < 0) { 1537 return len; 1538 } 1539 i += len; 1540 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1541 pkt_dev->vlan_cfi = value; 1542 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1543 } else { 1544 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1545 } 1546 return count; 1547 } 1548 1549 if (!strcmp(name, "svlan_id")) { 1550 len = num_arg(&user_buffer[i], 4, &value); 1551 if (len < 0) { 1552 return len; 1553 } 1554 i += len; 1555 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1556 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1557 1558 if (debug) 1559 printk(KERN_DEBUG "pktgen: SVLAN turned on\n"); 1560 1561 if (debug && pkt_dev->nr_labels) 1562 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1563 1564 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1565 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1566 } else { 1567 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1568 pkt_dev->svlan_id = 0xffff; 1569 1570 if (debug) 1571 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1572 } 1573 return count; 1574 } 1575 1576 if (!strcmp(name, "svlan_p")) { 1577 len = num_arg(&user_buffer[i], 1, &value); 1578 if (len < 0) { 1579 return len; 1580 } 1581 i += len; 1582 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1583 pkt_dev->svlan_p = value; 1584 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1585 } else { 1586 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1587 } 1588 return count; 1589 } 1590 1591 if (!strcmp(name, "svlan_cfi")) { 1592 len = num_arg(&user_buffer[i], 1, &value); 1593 if (len < 0) { 1594 return len; 1595 } 1596 i += len; 1597 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1598 pkt_dev->svlan_cfi = value; 1599 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1600 } else { 1601 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1602 } 1603 return count; 1604 } 1605 1606 if (!strcmp(name, "tos")) { 1607 __u32 tmp_value = 0; 1608 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1609 if (len < 0) { 1610 return len; 1611 } 1612 i += len; 1613 if (len == 2) { 1614 pkt_dev->tos = tmp_value; 1615 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1616 } else { 1617 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1618 } 1619 return count; 1620 } 1621 1622 if (!strcmp(name, "traffic_class")) { 1623 __u32 tmp_value = 0; 1624 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1625 if (len < 0) { 1626 return len; 1627 } 1628 i += len; 1629 if (len == 2) { 1630 pkt_dev->traffic_class = tmp_value; 1631 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1632 } else { 1633 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1634 } 1635 return count; 1636 } 1637 1638 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1639 return -EINVAL; 1640 } 1641 1642 static int pktgen_if_open(struct inode *inode, struct file *file) 1643 { 1644 return single_open(file, pktgen_if_show, PDE(inode)->data); 1645 } 1646 1647 static const struct file_operations pktgen_if_fops = { 1648 .owner = THIS_MODULE, 1649 .open = pktgen_if_open, 1650 .read = seq_read, 1651 .llseek = seq_lseek, 1652 .write = pktgen_if_write, 1653 .release = single_release, 1654 }; 1655 1656 static int pktgen_thread_show(struct seq_file *seq, void *v) 1657 { 1658 struct pktgen_thread *t = seq->private; 1659 struct pktgen_dev *pkt_dev; 1660 1661 BUG_ON(!t); 1662 1663 seq_printf(seq, "Running: "); 1664 1665 if_lock(t); 1666 list_for_each_entry(pkt_dev, &t->if_list, list) 1667 if (pkt_dev->running) 1668 seq_printf(seq, "%s ", pkt_dev->odev->name); 1669 1670 seq_printf(seq, "\nStopped: "); 1671 1672 list_for_each_entry(pkt_dev, &t->if_list, list) 1673 if (!pkt_dev->running) 1674 seq_printf(seq, "%s ", pkt_dev->odev->name); 1675 1676 if (t->result[0]) 1677 seq_printf(seq, "\nResult: %s\n", t->result); 1678 else 1679 seq_printf(seq, "\nResult: NA\n"); 1680 1681 if_unlock(t); 1682 1683 return 0; 1684 } 1685 1686 static ssize_t pktgen_thread_write(struct file *file, 1687 const char __user * user_buffer, 1688 size_t count, loff_t * offset) 1689 { 1690 struct seq_file *seq = (struct seq_file *)file->private_data; 1691 struct pktgen_thread *t = seq->private; 1692 int i = 0, max, len, ret; 1693 char name[40]; 1694 char *pg_result; 1695 1696 if (count < 1) { 1697 // sprintf(pg_result, "Wrong command format"); 1698 return -EINVAL; 1699 } 1700 1701 max = count - i; 1702 len = count_trail_chars(&user_buffer[i], max); 1703 if (len < 0) 1704 return len; 1705 1706 i += len; 1707 1708 /* Read variable name */ 1709 1710 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1711 if (len < 0) 1712 return len; 1713 1714 memset(name, 0, sizeof(name)); 1715 if (copy_from_user(name, &user_buffer[i], len)) 1716 return -EFAULT; 1717 i += len; 1718 1719 max = count - i; 1720 len = count_trail_chars(&user_buffer[i], max); 1721 if (len < 0) 1722 return len; 1723 1724 i += len; 1725 1726 if (debug) 1727 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n", 1728 name, (unsigned long)count); 1729 1730 if (!t) { 1731 printk(KERN_ERR "pktgen: ERROR: No thread\n"); 1732 ret = -EINVAL; 1733 goto out; 1734 } 1735 1736 pg_result = &(t->result[0]); 1737 1738 if (!strcmp(name, "add_device")) { 1739 char f[32]; 1740 memset(f, 0, 32); 1741 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1742 if (len < 0) { 1743 ret = len; 1744 goto out; 1745 } 1746 if (copy_from_user(f, &user_buffer[i], len)) 1747 return -EFAULT; 1748 i += len; 1749 mutex_lock(&pktgen_thread_lock); 1750 pktgen_add_device(t, f); 1751 mutex_unlock(&pktgen_thread_lock); 1752 ret = count; 1753 sprintf(pg_result, "OK: add_device=%s", f); 1754 goto out; 1755 } 1756 1757 if (!strcmp(name, "rem_device_all")) { 1758 mutex_lock(&pktgen_thread_lock); 1759 t->control |= T_REMDEVALL; 1760 mutex_unlock(&pktgen_thread_lock); 1761 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1762 ret = count; 1763 sprintf(pg_result, "OK: rem_device_all"); 1764 goto out; 1765 } 1766 1767 if (!strcmp(name, "max_before_softirq")) { 1768 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1769 ret = count; 1770 goto out; 1771 } 1772 1773 ret = -EINVAL; 1774 out: 1775 return ret; 1776 } 1777 1778 static int pktgen_thread_open(struct inode *inode, struct file *file) 1779 { 1780 return single_open(file, pktgen_thread_show, PDE(inode)->data); 1781 } 1782 1783 static const struct file_operations pktgen_thread_fops = { 1784 .owner = THIS_MODULE, 1785 .open = pktgen_thread_open, 1786 .read = seq_read, 1787 .llseek = seq_lseek, 1788 .write = pktgen_thread_write, 1789 .release = single_release, 1790 }; 1791 1792 /* Think find or remove for NN */ 1793 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove) 1794 { 1795 struct pktgen_thread *t; 1796 struct pktgen_dev *pkt_dev = NULL; 1797 1798 list_for_each_entry(t, &pktgen_threads, th_list) { 1799 pkt_dev = pktgen_find_dev(t, ifname); 1800 if (pkt_dev) { 1801 if (remove) { 1802 if_lock(t); 1803 pkt_dev->removal_mark = 1; 1804 t->control |= T_REMDEV; 1805 if_unlock(t); 1806 } 1807 break; 1808 } 1809 } 1810 return pkt_dev; 1811 } 1812 1813 /* 1814 * mark a device for removal 1815 */ 1816 static void pktgen_mark_device(const char *ifname) 1817 { 1818 struct pktgen_dev *pkt_dev = NULL; 1819 const int max_tries = 10, msec_per_try = 125; 1820 int i = 0; 1821 1822 mutex_lock(&pktgen_thread_lock); 1823 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname); 1824 1825 while (1) { 1826 1827 pkt_dev = __pktgen_NN_threads(ifname, REMOVE); 1828 if (pkt_dev == NULL) 1829 break; /* success */ 1830 1831 mutex_unlock(&pktgen_thread_lock); 1832 pr_debug("pktgen: pktgen_mark_device waiting for %s " 1833 "to disappear....\n", ifname); 1834 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1835 mutex_lock(&pktgen_thread_lock); 1836 1837 if (++i >= max_tries) { 1838 printk(KERN_ERR "pktgen_mark_device: timed out after " 1839 "waiting %d msec for device %s to be removed\n", 1840 msec_per_try * i, ifname); 1841 break; 1842 } 1843 1844 } 1845 1846 mutex_unlock(&pktgen_thread_lock); 1847 } 1848 1849 static void pktgen_change_name(struct net_device *dev) 1850 { 1851 struct pktgen_thread *t; 1852 1853 list_for_each_entry(t, &pktgen_threads, th_list) { 1854 struct pktgen_dev *pkt_dev; 1855 1856 list_for_each_entry(pkt_dev, &t->if_list, list) { 1857 if (pkt_dev->odev != dev) 1858 continue; 1859 1860 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 1861 1862 pkt_dev->entry = create_proc_entry(dev->name, 0600, 1863 pg_proc_dir); 1864 if (!pkt_dev->entry) 1865 printk(KERN_ERR "pktgen: can't move proc " 1866 " entry for '%s'\n", dev->name); 1867 break; 1868 } 1869 } 1870 } 1871 1872 static int pktgen_device_event(struct notifier_block *unused, 1873 unsigned long event, void *ptr) 1874 { 1875 struct net_device *dev = ptr; 1876 1877 if (dev->nd_net != &init_net) 1878 return NOTIFY_DONE; 1879 1880 /* It is OK that we do not hold the group lock right now, 1881 * as we run under the RTNL lock. 1882 */ 1883 1884 switch (event) { 1885 case NETDEV_CHANGENAME: 1886 pktgen_change_name(dev); 1887 break; 1888 1889 case NETDEV_UNREGISTER: 1890 pktgen_mark_device(dev->name); 1891 break; 1892 } 1893 1894 return NOTIFY_DONE; 1895 } 1896 1897 /* Associate pktgen_dev with a device. */ 1898 1899 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname) 1900 { 1901 struct net_device *odev; 1902 int err; 1903 1904 /* Clean old setups */ 1905 if (pkt_dev->odev) { 1906 dev_put(pkt_dev->odev); 1907 pkt_dev->odev = NULL; 1908 } 1909 1910 odev = dev_get_by_name(&init_net, ifname); 1911 if (!odev) { 1912 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname); 1913 return -ENODEV; 1914 } 1915 1916 if (odev->type != ARPHRD_ETHER) { 1917 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname); 1918 err = -EINVAL; 1919 } else if (!netif_running(odev)) { 1920 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname); 1921 err = -ENETDOWN; 1922 } else { 1923 pkt_dev->odev = odev; 1924 return 0; 1925 } 1926 1927 dev_put(odev); 1928 return err; 1929 } 1930 1931 /* Read pkt_dev from the interface and set up internal pktgen_dev 1932 * structure to have the right information to create/send packets 1933 */ 1934 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 1935 { 1936 if (!pkt_dev->odev) { 1937 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in " 1938 "setup_inject.\n"); 1939 sprintf(pkt_dev->result, 1940 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 1941 return; 1942 } 1943 1944 /* Default to the interface's mac if not explicitly set. */ 1945 1946 if (is_zero_ether_addr(pkt_dev->src_mac)) 1947 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN); 1948 1949 /* Set up Dest MAC */ 1950 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 1951 1952 /* Set up pkt size */ 1953 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 1954 1955 if (pkt_dev->flags & F_IPV6) { 1956 /* 1957 * Skip this automatic address setting until locks or functions 1958 * gets exported 1959 */ 1960 1961 #ifdef NOTNOW 1962 int i, set = 0, err = 1; 1963 struct inet6_dev *idev; 1964 1965 for (i = 0; i < IN6_ADDR_HSIZE; i++) 1966 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 1967 set = 1; 1968 break; 1969 } 1970 1971 if (!set) { 1972 1973 /* 1974 * Use linklevel address if unconfigured. 1975 * 1976 * use ipv6_get_lladdr if/when it's get exported 1977 */ 1978 1979 rcu_read_lock(); 1980 if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) { 1981 struct inet6_ifaddr *ifp; 1982 1983 read_lock_bh(&idev->lock); 1984 for (ifp = idev->addr_list; ifp; 1985 ifp = ifp->if_next) { 1986 if (ifp->scope == IFA_LINK 1987 && !(ifp-> 1988 flags & IFA_F_TENTATIVE)) { 1989 ipv6_addr_copy(&pkt_dev-> 1990 cur_in6_saddr, 1991 &ifp->addr); 1992 err = 0; 1993 break; 1994 } 1995 } 1996 read_unlock_bh(&idev->lock); 1997 } 1998 rcu_read_unlock(); 1999 if (err) 2000 printk(KERN_ERR "pktgen: ERROR: IPv6 link " 2001 "address not availble.\n"); 2002 } 2003 #endif 2004 } else { 2005 pkt_dev->saddr_min = 0; 2006 pkt_dev->saddr_max = 0; 2007 if (strlen(pkt_dev->src_min) == 0) { 2008 2009 struct in_device *in_dev; 2010 2011 rcu_read_lock(); 2012 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2013 if (in_dev) { 2014 if (in_dev->ifa_list) { 2015 pkt_dev->saddr_min = 2016 in_dev->ifa_list->ifa_address; 2017 pkt_dev->saddr_max = pkt_dev->saddr_min; 2018 } 2019 } 2020 rcu_read_unlock(); 2021 } else { 2022 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2023 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2024 } 2025 2026 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2027 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2028 } 2029 /* Initialize current values. */ 2030 pkt_dev->cur_dst_mac_offset = 0; 2031 pkt_dev->cur_src_mac_offset = 0; 2032 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2033 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2034 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2035 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2036 pkt_dev->nflows = 0; 2037 } 2038 2039 static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us) 2040 { 2041 __u64 start; 2042 __u64 now; 2043 2044 start = now = getCurUs(); 2045 while (now < spin_until_us) { 2046 /* TODO: optimize sleeping behavior */ 2047 if (spin_until_us - now > jiffies_to_usecs(1) + 1) 2048 schedule_timeout_interruptible(1); 2049 else if (spin_until_us - now > 100) { 2050 if (!pkt_dev->running) 2051 return; 2052 if (need_resched()) 2053 schedule(); 2054 } 2055 2056 now = getCurUs(); 2057 } 2058 2059 pkt_dev->idle_acc += now - start; 2060 } 2061 2062 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2063 { 2064 pkt_dev->pkt_overhead = 0; 2065 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2066 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2067 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2068 } 2069 2070 static inline int f_seen(struct pktgen_dev *pkt_dev, int flow) 2071 { 2072 2073 if (pkt_dev->flows[flow].flags & F_INIT) 2074 return 1; 2075 else 2076 return 0; 2077 } 2078 2079 static inline int f_pick(struct pktgen_dev *pkt_dev) 2080 { 2081 int flow = pkt_dev->curfl; 2082 2083 if (pkt_dev->flags & F_FLOW_SEQ) { 2084 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2085 /* reset time */ 2086 pkt_dev->flows[flow].count = 0; 2087 pkt_dev->curfl += 1; 2088 if (pkt_dev->curfl >= pkt_dev->cflows) 2089 pkt_dev->curfl = 0; /*reset */ 2090 } 2091 } else { 2092 flow = random32() % pkt_dev->cflows; 2093 2094 if (pkt_dev->flows[flow].count > pkt_dev->lflow) 2095 pkt_dev->flows[flow].count = 0; 2096 } 2097 2098 return pkt_dev->curfl; 2099 } 2100 2101 2102 #ifdef CONFIG_XFRM 2103 /* If there was already an IPSEC SA, we keep it as is, else 2104 * we go look for it ... 2105 */ 2106 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2107 { 2108 struct xfrm_state *x = pkt_dev->flows[flow].x; 2109 if (!x) { 2110 /*slow path: we dont already have xfrm_state*/ 2111 x = xfrm_stateonly_find((xfrm_address_t *)&pkt_dev->cur_daddr, 2112 (xfrm_address_t *)&pkt_dev->cur_saddr, 2113 AF_INET, 2114 pkt_dev->ipsmode, 2115 pkt_dev->ipsproto, 0); 2116 if (x) { 2117 pkt_dev->flows[flow].x = x; 2118 set_pkt_overhead(pkt_dev); 2119 pkt_dev->pkt_overhead+=x->props.header_len; 2120 } 2121 2122 } 2123 } 2124 #endif 2125 /* Increment/randomize headers according to flags and current values 2126 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2127 */ 2128 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2129 { 2130 __u32 imn; 2131 __u32 imx; 2132 int flow = 0; 2133 2134 if (pkt_dev->cflows) 2135 flow = f_pick(pkt_dev); 2136 2137 /* Deal with source MAC */ 2138 if (pkt_dev->src_mac_count > 1) { 2139 __u32 mc; 2140 __u32 tmp; 2141 2142 if (pkt_dev->flags & F_MACSRC_RND) 2143 mc = random32() % pkt_dev->src_mac_count; 2144 else { 2145 mc = pkt_dev->cur_src_mac_offset++; 2146 if (pkt_dev->cur_src_mac_offset > 2147 pkt_dev->src_mac_count) 2148 pkt_dev->cur_src_mac_offset = 0; 2149 } 2150 2151 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2152 pkt_dev->hh[11] = tmp; 2153 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2154 pkt_dev->hh[10] = tmp; 2155 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2156 pkt_dev->hh[9] = tmp; 2157 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2158 pkt_dev->hh[8] = tmp; 2159 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2160 pkt_dev->hh[7] = tmp; 2161 } 2162 2163 /* Deal with Destination MAC */ 2164 if (pkt_dev->dst_mac_count > 1) { 2165 __u32 mc; 2166 __u32 tmp; 2167 2168 if (pkt_dev->flags & F_MACDST_RND) 2169 mc = random32() % pkt_dev->dst_mac_count; 2170 2171 else { 2172 mc = pkt_dev->cur_dst_mac_offset++; 2173 if (pkt_dev->cur_dst_mac_offset > 2174 pkt_dev->dst_mac_count) { 2175 pkt_dev->cur_dst_mac_offset = 0; 2176 } 2177 } 2178 2179 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2180 pkt_dev->hh[5] = tmp; 2181 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2182 pkt_dev->hh[4] = tmp; 2183 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2184 pkt_dev->hh[3] = tmp; 2185 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2186 pkt_dev->hh[2] = tmp; 2187 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2188 pkt_dev->hh[1] = tmp; 2189 } 2190 2191 if (pkt_dev->flags & F_MPLS_RND) { 2192 unsigned i; 2193 for (i = 0; i < pkt_dev->nr_labels; i++) 2194 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2195 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2196 ((__force __be32)random32() & 2197 htonl(0x000fffff)); 2198 } 2199 2200 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2201 pkt_dev->vlan_id = random32() & (4096-1); 2202 } 2203 2204 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2205 pkt_dev->svlan_id = random32() & (4096 - 1); 2206 } 2207 2208 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2209 if (pkt_dev->flags & F_UDPSRC_RND) 2210 pkt_dev->cur_udp_src = random32() % 2211 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2212 + pkt_dev->udp_src_min; 2213 2214 else { 2215 pkt_dev->cur_udp_src++; 2216 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2217 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2218 } 2219 } 2220 2221 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2222 if (pkt_dev->flags & F_UDPDST_RND) { 2223 pkt_dev->cur_udp_dst = random32() % 2224 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2225 + pkt_dev->udp_dst_min; 2226 } else { 2227 pkt_dev->cur_udp_dst++; 2228 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2229 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2230 } 2231 } 2232 2233 if (!(pkt_dev->flags & F_IPV6)) { 2234 2235 if ((imn = ntohl(pkt_dev->saddr_min)) < (imx = 2236 ntohl(pkt_dev-> 2237 saddr_max))) { 2238 __u32 t; 2239 if (pkt_dev->flags & F_IPSRC_RND) 2240 t = random32() % (imx - imn) + imn; 2241 else { 2242 t = ntohl(pkt_dev->cur_saddr); 2243 t++; 2244 if (t > imx) { 2245 t = imn; 2246 } 2247 } 2248 pkt_dev->cur_saddr = htonl(t); 2249 } 2250 2251 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2252 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2253 } else { 2254 imn = ntohl(pkt_dev->daddr_min); 2255 imx = ntohl(pkt_dev->daddr_max); 2256 if (imn < imx) { 2257 __u32 t; 2258 __be32 s; 2259 if (pkt_dev->flags & F_IPDST_RND) { 2260 2261 t = random32() % (imx - imn) + imn; 2262 s = htonl(t); 2263 2264 while (ipv4_is_loopback(s) || 2265 ipv4_is_multicast(s) || 2266 ipv4_is_lbcast(s) || 2267 ipv4_is_zeronet(s) || 2268 ipv4_is_local_multicast(s)) { 2269 t = random32() % (imx - imn) + imn; 2270 s = htonl(t); 2271 } 2272 pkt_dev->cur_daddr = s; 2273 } else { 2274 t = ntohl(pkt_dev->cur_daddr); 2275 t++; 2276 if (t > imx) { 2277 t = imn; 2278 } 2279 pkt_dev->cur_daddr = htonl(t); 2280 } 2281 } 2282 if (pkt_dev->cflows) { 2283 pkt_dev->flows[flow].flags |= F_INIT; 2284 pkt_dev->flows[flow].cur_daddr = 2285 pkt_dev->cur_daddr; 2286 #ifdef CONFIG_XFRM 2287 if (pkt_dev->flags & F_IPSEC_ON) 2288 get_ipsec_sa(pkt_dev, flow); 2289 #endif 2290 pkt_dev->nflows++; 2291 } 2292 } 2293 } else { /* IPV6 * */ 2294 2295 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 && 2296 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 && 2297 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 && 2298 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ; 2299 else { 2300 int i; 2301 2302 /* Only random destinations yet */ 2303 2304 for (i = 0; i < 4; i++) { 2305 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2306 (((__force __be32)random32() | 2307 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2308 pkt_dev->max_in6_daddr.s6_addr32[i]); 2309 } 2310 } 2311 } 2312 2313 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2314 __u32 t; 2315 if (pkt_dev->flags & F_TXSIZE_RND) { 2316 t = random32() % 2317 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2318 + pkt_dev->min_pkt_size; 2319 } else { 2320 t = pkt_dev->cur_pkt_size + 1; 2321 if (t > pkt_dev->max_pkt_size) 2322 t = pkt_dev->min_pkt_size; 2323 } 2324 pkt_dev->cur_pkt_size = t; 2325 } 2326 2327 if (pkt_dev->queue_map_min < pkt_dev->queue_map_max) { 2328 __u16 t; 2329 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2330 t = random32() % 2331 (pkt_dev->queue_map_max - pkt_dev->queue_map_min + 1) 2332 + pkt_dev->queue_map_min; 2333 } else { 2334 t = pkt_dev->cur_queue_map + 1; 2335 if (t > pkt_dev->queue_map_max) 2336 t = pkt_dev->queue_map_min; 2337 } 2338 pkt_dev->cur_queue_map = t; 2339 } 2340 2341 pkt_dev->flows[flow].count++; 2342 } 2343 2344 2345 #ifdef CONFIG_XFRM 2346 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2347 { 2348 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2349 int err = 0; 2350 struct iphdr *iph; 2351 2352 if (!x) 2353 return 0; 2354 /* XXX: we dont support tunnel mode for now until 2355 * we resolve the dst issue */ 2356 if (x->props.mode != XFRM_MODE_TRANSPORT) 2357 return 0; 2358 2359 spin_lock(&x->lock); 2360 iph = ip_hdr(skb); 2361 2362 err = x->outer_mode->output(x, skb); 2363 if (err) 2364 goto error; 2365 err = x->type->output(x, skb); 2366 if (err) 2367 goto error; 2368 2369 x->curlft.bytes +=skb->len; 2370 x->curlft.packets++; 2371 error: 2372 spin_unlock(&x->lock); 2373 return err; 2374 } 2375 2376 static inline void free_SAs(struct pktgen_dev *pkt_dev) 2377 { 2378 if (pkt_dev->cflows) { 2379 /* let go of the SAs if we have them */ 2380 int i = 0; 2381 for (; i < pkt_dev->nflows; i++){ 2382 struct xfrm_state *x = pkt_dev->flows[i].x; 2383 if (x) { 2384 xfrm_state_put(x); 2385 pkt_dev->flows[i].x = NULL; 2386 } 2387 } 2388 } 2389 } 2390 2391 static inline int process_ipsec(struct pktgen_dev *pkt_dev, 2392 struct sk_buff *skb, __be16 protocol) 2393 { 2394 if (pkt_dev->flags & F_IPSEC_ON) { 2395 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2396 int nhead = 0; 2397 if (x) { 2398 int ret; 2399 __u8 *eth; 2400 nhead = x->props.header_len - skb_headroom(skb); 2401 if (nhead >0) { 2402 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2403 if (ret < 0) { 2404 printk(KERN_ERR "Error expanding " 2405 "ipsec packet %d\n",ret); 2406 return 0; 2407 } 2408 } 2409 2410 /* ipsec is not expecting ll header */ 2411 skb_pull(skb, ETH_HLEN); 2412 ret = pktgen_output_ipsec(skb, pkt_dev); 2413 if (ret) { 2414 printk(KERN_ERR "Error creating ipsec " 2415 "packet %d\n",ret); 2416 kfree_skb(skb); 2417 return 0; 2418 } 2419 /* restore ll */ 2420 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2421 memcpy(eth, pkt_dev->hh, 12); 2422 *(u16 *) & eth[12] = protocol; 2423 } 2424 } 2425 return 1; 2426 } 2427 #endif 2428 2429 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2430 { 2431 unsigned i; 2432 for (i = 0; i < pkt_dev->nr_labels; i++) { 2433 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2434 } 2435 mpls--; 2436 *mpls |= MPLS_STACK_BOTTOM; 2437 } 2438 2439 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2440 unsigned int prio) 2441 { 2442 return htons(id | (cfi << 12) | (prio << 13)); 2443 } 2444 2445 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2446 struct pktgen_dev *pkt_dev) 2447 { 2448 struct sk_buff *skb = NULL; 2449 __u8 *eth; 2450 struct udphdr *udph; 2451 int datalen, iplen; 2452 struct iphdr *iph; 2453 struct pktgen_hdr *pgh = NULL; 2454 __be16 protocol = htons(ETH_P_IP); 2455 __be32 *mpls; 2456 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2457 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2458 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2459 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2460 2461 2462 if (pkt_dev->nr_labels) 2463 protocol = htons(ETH_P_MPLS_UC); 2464 2465 if (pkt_dev->vlan_id != 0xffff) 2466 protocol = htons(ETH_P_8021Q); 2467 2468 /* Update any of the values, used when we're incrementing various 2469 * fields. 2470 */ 2471 mod_cur_headers(pkt_dev); 2472 2473 datalen = (odev->hard_header_len + 16) & ~0xf; 2474 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + datalen + 2475 pkt_dev->pkt_overhead, GFP_ATOMIC); 2476 if (!skb) { 2477 sprintf(pkt_dev->result, "No memory"); 2478 return NULL; 2479 } 2480 2481 skb_reserve(skb, datalen); 2482 2483 /* Reserve for ethernet and IP header */ 2484 eth = (__u8 *) skb_push(skb, 14); 2485 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2486 if (pkt_dev->nr_labels) 2487 mpls_push(mpls, pkt_dev); 2488 2489 if (pkt_dev->vlan_id != 0xffff) { 2490 if (pkt_dev->svlan_id != 0xffff) { 2491 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2492 *svlan_tci = build_tci(pkt_dev->svlan_id, 2493 pkt_dev->svlan_cfi, 2494 pkt_dev->svlan_p); 2495 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2496 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2497 } 2498 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2499 *vlan_tci = build_tci(pkt_dev->vlan_id, 2500 pkt_dev->vlan_cfi, 2501 pkt_dev->vlan_p); 2502 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2503 *vlan_encapsulated_proto = htons(ETH_P_IP); 2504 } 2505 2506 skb->network_header = skb->tail; 2507 skb->transport_header = skb->network_header + sizeof(struct iphdr); 2508 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr)); 2509 skb_set_queue_mapping(skb, pkt_dev->cur_queue_map); 2510 iph = ip_hdr(skb); 2511 udph = udp_hdr(skb); 2512 2513 memcpy(eth, pkt_dev->hh, 12); 2514 *(__be16 *) & eth[12] = protocol; 2515 2516 /* Eth + IPh + UDPh + mpls */ 2517 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2518 pkt_dev->pkt_overhead; 2519 if (datalen < sizeof(struct pktgen_hdr)) 2520 datalen = sizeof(struct pktgen_hdr); 2521 2522 udph->source = htons(pkt_dev->cur_udp_src); 2523 udph->dest = htons(pkt_dev->cur_udp_dst); 2524 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2525 udph->check = 0; /* No checksum */ 2526 2527 iph->ihl = 5; 2528 iph->version = 4; 2529 iph->ttl = 32; 2530 iph->tos = pkt_dev->tos; 2531 iph->protocol = IPPROTO_UDP; /* UDP */ 2532 iph->saddr = pkt_dev->cur_saddr; 2533 iph->daddr = pkt_dev->cur_daddr; 2534 iph->frag_off = 0; 2535 iplen = 20 + 8 + datalen; 2536 iph->tot_len = htons(iplen); 2537 iph->check = 0; 2538 iph->check = ip_fast_csum((void *)iph, iph->ihl); 2539 skb->protocol = protocol; 2540 skb->mac_header = (skb->network_header - ETH_HLEN - 2541 pkt_dev->pkt_overhead); 2542 skb->dev = odev; 2543 skb->pkt_type = PACKET_HOST; 2544 2545 if (pkt_dev->nfrags <= 0) 2546 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 2547 else { 2548 int frags = pkt_dev->nfrags; 2549 int i; 2550 2551 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 2552 2553 if (frags > MAX_SKB_FRAGS) 2554 frags = MAX_SKB_FRAGS; 2555 if (datalen > frags * PAGE_SIZE) { 2556 skb_put(skb, datalen - frags * PAGE_SIZE); 2557 datalen = frags * PAGE_SIZE; 2558 } 2559 2560 i = 0; 2561 while (datalen > 0) { 2562 struct page *page = alloc_pages(GFP_KERNEL, 0); 2563 skb_shinfo(skb)->frags[i].page = page; 2564 skb_shinfo(skb)->frags[i].page_offset = 0; 2565 skb_shinfo(skb)->frags[i].size = 2566 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 2567 datalen -= skb_shinfo(skb)->frags[i].size; 2568 skb->len += skb_shinfo(skb)->frags[i].size; 2569 skb->data_len += skb_shinfo(skb)->frags[i].size; 2570 i++; 2571 skb_shinfo(skb)->nr_frags = i; 2572 } 2573 2574 while (i < frags) { 2575 int rem; 2576 2577 if (i == 0) 2578 break; 2579 2580 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 2581 if (rem == 0) 2582 break; 2583 2584 skb_shinfo(skb)->frags[i - 1].size -= rem; 2585 2586 skb_shinfo(skb)->frags[i] = 2587 skb_shinfo(skb)->frags[i - 1]; 2588 get_page(skb_shinfo(skb)->frags[i].page); 2589 skb_shinfo(skb)->frags[i].page = 2590 skb_shinfo(skb)->frags[i - 1].page; 2591 skb_shinfo(skb)->frags[i].page_offset += 2592 skb_shinfo(skb)->frags[i - 1].size; 2593 skb_shinfo(skb)->frags[i].size = rem; 2594 i++; 2595 skb_shinfo(skb)->nr_frags = i; 2596 } 2597 } 2598 2599 /* Stamp the time, and sequence number, convert them to network byte order */ 2600 2601 if (pgh) { 2602 struct timeval timestamp; 2603 2604 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2605 pgh->seq_num = htonl(pkt_dev->seq_num); 2606 2607 do_gettimeofday(×tamp); 2608 pgh->tv_sec = htonl(timestamp.tv_sec); 2609 pgh->tv_usec = htonl(timestamp.tv_usec); 2610 } 2611 2612 #ifdef CONFIG_XFRM 2613 if (!process_ipsec(pkt_dev, skb, protocol)) 2614 return NULL; 2615 #endif 2616 2617 return skb; 2618 } 2619 2620 /* 2621 * scan_ip6, fmt_ip taken from dietlibc-0.21 2622 * Author Felix von Leitner <felix-dietlibc@fefe.de> 2623 * 2624 * Slightly modified for kernel. 2625 * Should be candidate for net/ipv4/utils.c 2626 * --ro 2627 */ 2628 2629 static unsigned int scan_ip6(const char *s, char ip[16]) 2630 { 2631 unsigned int i; 2632 unsigned int len = 0; 2633 unsigned long u; 2634 char suffix[16]; 2635 unsigned int prefixlen = 0; 2636 unsigned int suffixlen = 0; 2637 __be32 tmp; 2638 char *pos; 2639 2640 for (i = 0; i < 16; i++) 2641 ip[i] = 0; 2642 2643 for (;;) { 2644 if (*s == ':') { 2645 len++; 2646 if (s[1] == ':') { /* Found "::", skip to part 2 */ 2647 s += 2; 2648 len++; 2649 break; 2650 } 2651 s++; 2652 } 2653 2654 u = simple_strtoul(s, &pos, 16); 2655 i = pos - s; 2656 if (!i) 2657 return 0; 2658 if (prefixlen == 12 && s[i] == '.') { 2659 2660 /* the last 4 bytes may be written as IPv4 address */ 2661 2662 tmp = in_aton(s); 2663 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp)); 2664 return i + len; 2665 } 2666 ip[prefixlen++] = (u >> 8); 2667 ip[prefixlen++] = (u & 255); 2668 s += i; 2669 len += i; 2670 if (prefixlen == 16) 2671 return len; 2672 } 2673 2674 /* part 2, after "::" */ 2675 for (;;) { 2676 if (*s == ':') { 2677 if (suffixlen == 0) 2678 break; 2679 s++; 2680 len++; 2681 } else if (suffixlen != 0) 2682 break; 2683 2684 u = simple_strtol(s, &pos, 16); 2685 i = pos - s; 2686 if (!i) { 2687 if (*s) 2688 len--; 2689 break; 2690 } 2691 if (suffixlen + prefixlen <= 12 && s[i] == '.') { 2692 tmp = in_aton(s); 2693 memcpy((struct in_addr *)(suffix + suffixlen), &tmp, 2694 sizeof(tmp)); 2695 suffixlen += 4; 2696 len += strlen(s); 2697 break; 2698 } 2699 suffix[suffixlen++] = (u >> 8); 2700 suffix[suffixlen++] = (u & 255); 2701 s += i; 2702 len += i; 2703 if (prefixlen + suffixlen == 16) 2704 break; 2705 } 2706 for (i = 0; i < suffixlen; i++) 2707 ip[16 - suffixlen + i] = suffix[i]; 2708 return len; 2709 } 2710 2711 static char tohex(char hexdigit) 2712 { 2713 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0'; 2714 } 2715 2716 static int fmt_xlong(char *s, unsigned int i) 2717 { 2718 char *bak = s; 2719 *s = tohex((i >> 12) & 0xf); 2720 if (s != bak || *s != '0') 2721 ++s; 2722 *s = tohex((i >> 8) & 0xf); 2723 if (s != bak || *s != '0') 2724 ++s; 2725 *s = tohex((i >> 4) & 0xf); 2726 if (s != bak || *s != '0') 2727 ++s; 2728 *s = tohex(i & 0xf); 2729 return s - bak + 1; 2730 } 2731 2732 static unsigned int fmt_ip6(char *s, const char ip[16]) 2733 { 2734 unsigned int len; 2735 unsigned int i; 2736 unsigned int temp; 2737 unsigned int compressing; 2738 int j; 2739 2740 len = 0; 2741 compressing = 0; 2742 for (j = 0; j < 16; j += 2) { 2743 2744 #ifdef V4MAPPEDPREFIX 2745 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) { 2746 inet_ntoa_r(*(struct in_addr *)(ip + 12), s); 2747 temp = strlen(s); 2748 return len + temp; 2749 } 2750 #endif 2751 temp = ((unsigned long)(unsigned char)ip[j] << 8) + 2752 (unsigned long)(unsigned char)ip[j + 1]; 2753 if (temp == 0) { 2754 if (!compressing) { 2755 compressing = 1; 2756 if (j == 0) { 2757 *s++ = ':'; 2758 ++len; 2759 } 2760 } 2761 } else { 2762 if (compressing) { 2763 compressing = 0; 2764 *s++ = ':'; 2765 ++len; 2766 } 2767 i = fmt_xlong(s, temp); 2768 len += i; 2769 s += i; 2770 if (j < 14) { 2771 *s++ = ':'; 2772 ++len; 2773 } 2774 } 2775 } 2776 if (compressing) { 2777 *s++ = ':'; 2778 ++len; 2779 } 2780 *s = 0; 2781 return len; 2782 } 2783 2784 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2785 struct pktgen_dev *pkt_dev) 2786 { 2787 struct sk_buff *skb = NULL; 2788 __u8 *eth; 2789 struct udphdr *udph; 2790 int datalen; 2791 struct ipv6hdr *iph; 2792 struct pktgen_hdr *pgh = NULL; 2793 __be16 protocol = htons(ETH_P_IPV6); 2794 __be32 *mpls; 2795 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2796 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2797 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2798 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2799 2800 if (pkt_dev->nr_labels) 2801 protocol = htons(ETH_P_MPLS_UC); 2802 2803 if (pkt_dev->vlan_id != 0xffff) 2804 protocol = htons(ETH_P_8021Q); 2805 2806 /* Update any of the values, used when we're incrementing various 2807 * fields. 2808 */ 2809 mod_cur_headers(pkt_dev); 2810 2811 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16 + 2812 pkt_dev->pkt_overhead, GFP_ATOMIC); 2813 if (!skb) { 2814 sprintf(pkt_dev->result, "No memory"); 2815 return NULL; 2816 } 2817 2818 skb_reserve(skb, 16); 2819 2820 /* Reserve for ethernet and IP header */ 2821 eth = (__u8 *) skb_push(skb, 14); 2822 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2823 if (pkt_dev->nr_labels) 2824 mpls_push(mpls, pkt_dev); 2825 2826 if (pkt_dev->vlan_id != 0xffff) { 2827 if (pkt_dev->svlan_id != 0xffff) { 2828 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2829 *svlan_tci = build_tci(pkt_dev->svlan_id, 2830 pkt_dev->svlan_cfi, 2831 pkt_dev->svlan_p); 2832 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2833 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2834 } 2835 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2836 *vlan_tci = build_tci(pkt_dev->vlan_id, 2837 pkt_dev->vlan_cfi, 2838 pkt_dev->vlan_p); 2839 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2840 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 2841 } 2842 2843 skb->network_header = skb->tail; 2844 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr); 2845 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr)); 2846 skb_set_queue_mapping(skb, pkt_dev->cur_queue_map); 2847 iph = ipv6_hdr(skb); 2848 udph = udp_hdr(skb); 2849 2850 memcpy(eth, pkt_dev->hh, 12); 2851 *(__be16 *) & eth[12] = protocol; 2852 2853 /* Eth + IPh + UDPh + mpls */ 2854 datalen = pkt_dev->cur_pkt_size - 14 - 2855 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 2856 pkt_dev->pkt_overhead; 2857 2858 if (datalen < sizeof(struct pktgen_hdr)) { 2859 datalen = sizeof(struct pktgen_hdr); 2860 if (net_ratelimit()) 2861 printk(KERN_INFO "pktgen: increased datalen to %d\n", 2862 datalen); 2863 } 2864 2865 udph->source = htons(pkt_dev->cur_udp_src); 2866 udph->dest = htons(pkt_dev->cur_udp_dst); 2867 udph->len = htons(datalen + sizeof(struct udphdr)); 2868 udph->check = 0; /* No checksum */ 2869 2870 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 2871 2872 if (pkt_dev->traffic_class) { 2873 /* Version + traffic class + flow (0) */ 2874 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 2875 } 2876 2877 iph->hop_limit = 32; 2878 2879 iph->payload_len = htons(sizeof(struct udphdr) + datalen); 2880 iph->nexthdr = IPPROTO_UDP; 2881 2882 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr); 2883 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr); 2884 2885 skb->mac_header = (skb->network_header - ETH_HLEN - 2886 pkt_dev->pkt_overhead); 2887 skb->protocol = protocol; 2888 skb->dev = odev; 2889 skb->pkt_type = PACKET_HOST; 2890 2891 if (pkt_dev->nfrags <= 0) 2892 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 2893 else { 2894 int frags = pkt_dev->nfrags; 2895 int i; 2896 2897 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 2898 2899 if (frags > MAX_SKB_FRAGS) 2900 frags = MAX_SKB_FRAGS; 2901 if (datalen > frags * PAGE_SIZE) { 2902 skb_put(skb, datalen - frags * PAGE_SIZE); 2903 datalen = frags * PAGE_SIZE; 2904 } 2905 2906 i = 0; 2907 while (datalen > 0) { 2908 struct page *page = alloc_pages(GFP_KERNEL, 0); 2909 skb_shinfo(skb)->frags[i].page = page; 2910 skb_shinfo(skb)->frags[i].page_offset = 0; 2911 skb_shinfo(skb)->frags[i].size = 2912 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 2913 datalen -= skb_shinfo(skb)->frags[i].size; 2914 skb->len += skb_shinfo(skb)->frags[i].size; 2915 skb->data_len += skb_shinfo(skb)->frags[i].size; 2916 i++; 2917 skb_shinfo(skb)->nr_frags = i; 2918 } 2919 2920 while (i < frags) { 2921 int rem; 2922 2923 if (i == 0) 2924 break; 2925 2926 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 2927 if (rem == 0) 2928 break; 2929 2930 skb_shinfo(skb)->frags[i - 1].size -= rem; 2931 2932 skb_shinfo(skb)->frags[i] = 2933 skb_shinfo(skb)->frags[i - 1]; 2934 get_page(skb_shinfo(skb)->frags[i].page); 2935 skb_shinfo(skb)->frags[i].page = 2936 skb_shinfo(skb)->frags[i - 1].page; 2937 skb_shinfo(skb)->frags[i].page_offset += 2938 skb_shinfo(skb)->frags[i - 1].size; 2939 skb_shinfo(skb)->frags[i].size = rem; 2940 i++; 2941 skb_shinfo(skb)->nr_frags = i; 2942 } 2943 } 2944 2945 /* Stamp the time, and sequence number, convert them to network byte order */ 2946 /* should we update cloned packets too ? */ 2947 if (pgh) { 2948 struct timeval timestamp; 2949 2950 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2951 pgh->seq_num = htonl(pkt_dev->seq_num); 2952 2953 do_gettimeofday(×tamp); 2954 pgh->tv_sec = htonl(timestamp.tv_sec); 2955 pgh->tv_usec = htonl(timestamp.tv_usec); 2956 } 2957 /* pkt_dev->seq_num++; FF: you really mean this? */ 2958 2959 return skb; 2960 } 2961 2962 static inline struct sk_buff *fill_packet(struct net_device *odev, 2963 struct pktgen_dev *pkt_dev) 2964 { 2965 if (pkt_dev->flags & F_IPV6) 2966 return fill_packet_ipv6(odev, pkt_dev); 2967 else 2968 return fill_packet_ipv4(odev, pkt_dev); 2969 } 2970 2971 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 2972 { 2973 pkt_dev->seq_num = 1; 2974 pkt_dev->idle_acc = 0; 2975 pkt_dev->sofar = 0; 2976 pkt_dev->tx_bytes = 0; 2977 pkt_dev->errors = 0; 2978 } 2979 2980 /* Set up structure for sending pkts, clear counters */ 2981 2982 static void pktgen_run(struct pktgen_thread *t) 2983 { 2984 struct pktgen_dev *pkt_dev; 2985 int started = 0; 2986 2987 pr_debug("pktgen: entering pktgen_run. %p\n", t); 2988 2989 if_lock(t); 2990 list_for_each_entry(pkt_dev, &t->if_list, list) { 2991 2992 /* 2993 * setup odev and create initial packet. 2994 */ 2995 pktgen_setup_inject(pkt_dev); 2996 2997 if (pkt_dev->odev) { 2998 pktgen_clear_counters(pkt_dev); 2999 pkt_dev->running = 1; /* Cranke yeself! */ 3000 pkt_dev->skb = NULL; 3001 pkt_dev->started_at = getCurUs(); 3002 pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */ 3003 pkt_dev->next_tx_ns = 0; 3004 set_pkt_overhead(pkt_dev); 3005 3006 strcpy(pkt_dev->result, "Starting"); 3007 started++; 3008 } else 3009 strcpy(pkt_dev->result, "Error starting"); 3010 } 3011 if_unlock(t); 3012 if (started) 3013 t->control &= ~(T_STOP); 3014 } 3015 3016 static void pktgen_stop_all_threads_ifs(void) 3017 { 3018 struct pktgen_thread *t; 3019 3020 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n"); 3021 3022 mutex_lock(&pktgen_thread_lock); 3023 3024 list_for_each_entry(t, &pktgen_threads, th_list) 3025 t->control |= T_STOP; 3026 3027 mutex_unlock(&pktgen_thread_lock); 3028 } 3029 3030 static int thread_is_running(struct pktgen_thread *t) 3031 { 3032 struct pktgen_dev *pkt_dev; 3033 int res = 0; 3034 3035 list_for_each_entry(pkt_dev, &t->if_list, list) 3036 if (pkt_dev->running) { 3037 res = 1; 3038 break; 3039 } 3040 return res; 3041 } 3042 3043 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3044 { 3045 if_lock(t); 3046 3047 while (thread_is_running(t)) { 3048 3049 if_unlock(t); 3050 3051 msleep_interruptible(100); 3052 3053 if (signal_pending(current)) 3054 goto signal; 3055 if_lock(t); 3056 } 3057 if_unlock(t); 3058 return 1; 3059 signal: 3060 return 0; 3061 } 3062 3063 static int pktgen_wait_all_threads_run(void) 3064 { 3065 struct pktgen_thread *t; 3066 int sig = 1; 3067 3068 mutex_lock(&pktgen_thread_lock); 3069 3070 list_for_each_entry(t, &pktgen_threads, th_list) { 3071 sig = pktgen_wait_thread_run(t); 3072 if (sig == 0) 3073 break; 3074 } 3075 3076 if (sig == 0) 3077 list_for_each_entry(t, &pktgen_threads, th_list) 3078 t->control |= (T_STOP); 3079 3080 mutex_unlock(&pktgen_thread_lock); 3081 return sig; 3082 } 3083 3084 static void pktgen_run_all_threads(void) 3085 { 3086 struct pktgen_thread *t; 3087 3088 pr_debug("pktgen: entering pktgen_run_all_threads.\n"); 3089 3090 mutex_lock(&pktgen_thread_lock); 3091 3092 list_for_each_entry(t, &pktgen_threads, th_list) 3093 t->control |= (T_RUN); 3094 3095 mutex_unlock(&pktgen_thread_lock); 3096 3097 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 3098 3099 pktgen_wait_all_threads_run(); 3100 } 3101 3102 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3103 { 3104 __u64 total_us, bps, mbps, pps, idle; 3105 char *p = pkt_dev->result; 3106 3107 total_us = pkt_dev->stopped_at - pkt_dev->started_at; 3108 3109 idle = pkt_dev->idle_acc; 3110 3111 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", 3112 (unsigned long long)total_us, 3113 (unsigned long long)(total_us - idle), 3114 (unsigned long long)idle, 3115 (unsigned long long)pkt_dev->sofar, 3116 pkt_dev->cur_pkt_size, nr_frags); 3117 3118 pps = pkt_dev->sofar * USEC_PER_SEC; 3119 3120 while ((total_us >> 32) != 0) { 3121 pps >>= 1; 3122 total_us >>= 1; 3123 } 3124 3125 do_div(pps, total_us); 3126 3127 bps = pps * 8 * pkt_dev->cur_pkt_size; 3128 3129 mbps = bps; 3130 do_div(mbps, 1000000); 3131 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3132 (unsigned long long)pps, 3133 (unsigned long long)mbps, 3134 (unsigned long long)bps, 3135 (unsigned long long)pkt_dev->errors); 3136 } 3137 3138 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3139 3140 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3141 { 3142 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3143 3144 if (!pkt_dev->running) { 3145 printk(KERN_WARNING "pktgen: interface: %s is already " 3146 "stopped\n", pkt_dev->odev->name); 3147 return -EINVAL; 3148 } 3149 3150 pkt_dev->stopped_at = getCurUs(); 3151 pkt_dev->running = 0; 3152 3153 show_results(pkt_dev, nr_frags); 3154 3155 return 0; 3156 } 3157 3158 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3159 { 3160 struct pktgen_dev *pkt_dev, *best = NULL; 3161 3162 if_lock(t); 3163 3164 list_for_each_entry(pkt_dev, &t->if_list, list) { 3165 if (!pkt_dev->running) 3166 continue; 3167 if (best == NULL) 3168 best = pkt_dev; 3169 else if (pkt_dev->next_tx_us < best->next_tx_us) 3170 best = pkt_dev; 3171 } 3172 if_unlock(t); 3173 return best; 3174 } 3175 3176 static void pktgen_stop(struct pktgen_thread *t) 3177 { 3178 struct pktgen_dev *pkt_dev; 3179 3180 pr_debug("pktgen: entering pktgen_stop\n"); 3181 3182 if_lock(t); 3183 3184 list_for_each_entry(pkt_dev, &t->if_list, list) { 3185 pktgen_stop_device(pkt_dev); 3186 if (pkt_dev->skb) 3187 kfree_skb(pkt_dev->skb); 3188 3189 pkt_dev->skb = NULL; 3190 } 3191 3192 if_unlock(t); 3193 } 3194 3195 /* 3196 * one of our devices needs to be removed - find it 3197 * and remove it 3198 */ 3199 static void pktgen_rem_one_if(struct pktgen_thread *t) 3200 { 3201 struct list_head *q, *n; 3202 struct pktgen_dev *cur; 3203 3204 pr_debug("pktgen: entering pktgen_rem_one_if\n"); 3205 3206 if_lock(t); 3207 3208 list_for_each_safe(q, n, &t->if_list) { 3209 cur = list_entry(q, struct pktgen_dev, list); 3210 3211 if (!cur->removal_mark) 3212 continue; 3213 3214 if (cur->skb) 3215 kfree_skb(cur->skb); 3216 cur->skb = NULL; 3217 3218 pktgen_remove_device(t, cur); 3219 3220 break; 3221 } 3222 3223 if_unlock(t); 3224 } 3225 3226 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3227 { 3228 struct list_head *q, *n; 3229 struct pktgen_dev *cur; 3230 3231 /* Remove all devices, free mem */ 3232 3233 pr_debug("pktgen: entering pktgen_rem_all_ifs\n"); 3234 if_lock(t); 3235 3236 list_for_each_safe(q, n, &t->if_list) { 3237 cur = list_entry(q, struct pktgen_dev, list); 3238 3239 if (cur->skb) 3240 kfree_skb(cur->skb); 3241 cur->skb = NULL; 3242 3243 pktgen_remove_device(t, cur); 3244 } 3245 3246 if_unlock(t); 3247 } 3248 3249 static void pktgen_rem_thread(struct pktgen_thread *t) 3250 { 3251 /* Remove from the thread list */ 3252 3253 remove_proc_entry(t->tsk->comm, pg_proc_dir); 3254 3255 mutex_lock(&pktgen_thread_lock); 3256 3257 list_del(&t->th_list); 3258 3259 mutex_unlock(&pktgen_thread_lock); 3260 } 3261 3262 static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev) 3263 { 3264 struct net_device *odev = NULL; 3265 __u64 idle_start = 0; 3266 int ret; 3267 3268 odev = pkt_dev->odev; 3269 3270 if (pkt_dev->delay_us || pkt_dev->delay_ns) { 3271 u64 now; 3272 3273 now = getCurUs(); 3274 if (now < pkt_dev->next_tx_us) 3275 spin(pkt_dev, pkt_dev->next_tx_us); 3276 3277 /* This is max DELAY, this has special meaning of 3278 * "never transmit" 3279 */ 3280 if (pkt_dev->delay_us == 0x7FFFFFFF) { 3281 pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us; 3282 pkt_dev->next_tx_ns = pkt_dev->delay_ns; 3283 goto out; 3284 } 3285 } 3286 3287 if ((netif_queue_stopped(odev) || 3288 (pkt_dev->skb && 3289 netif_subqueue_stopped(odev, pkt_dev->skb))) || 3290 need_resched()) { 3291 idle_start = getCurUs(); 3292 3293 if (!netif_running(odev)) { 3294 pktgen_stop_device(pkt_dev); 3295 if (pkt_dev->skb) 3296 kfree_skb(pkt_dev->skb); 3297 pkt_dev->skb = NULL; 3298 goto out; 3299 } 3300 if (need_resched()) 3301 schedule(); 3302 3303 pkt_dev->idle_acc += getCurUs() - idle_start; 3304 3305 if (netif_queue_stopped(odev) || 3306 netif_subqueue_stopped(odev, pkt_dev->skb)) { 3307 pkt_dev->next_tx_us = getCurUs(); /* TODO */ 3308 pkt_dev->next_tx_ns = 0; 3309 goto out; /* Try the next interface */ 3310 } 3311 } 3312 3313 if (pkt_dev->last_ok || !pkt_dev->skb) { 3314 if ((++pkt_dev->clone_count >= pkt_dev->clone_skb) 3315 || (!pkt_dev->skb)) { 3316 /* build a new pkt */ 3317 if (pkt_dev->skb) 3318 kfree_skb(pkt_dev->skb); 3319 3320 pkt_dev->skb = fill_packet(odev, pkt_dev); 3321 if (pkt_dev->skb == NULL) { 3322 printk(KERN_ERR "pktgen: ERROR: couldn't " 3323 "allocate skb in fill_packet.\n"); 3324 schedule(); 3325 pkt_dev->clone_count--; /* back out increment, OOM */ 3326 goto out; 3327 } 3328 pkt_dev->allocated_skbs++; 3329 pkt_dev->clone_count = 0; /* reset counter */ 3330 } 3331 } 3332 3333 netif_tx_lock_bh(odev); 3334 if (!netif_queue_stopped(odev) && 3335 !netif_subqueue_stopped(odev, pkt_dev->skb)) { 3336 3337 atomic_inc(&(pkt_dev->skb->users)); 3338 retry_now: 3339 ret = odev->hard_start_xmit(pkt_dev->skb, odev); 3340 if (likely(ret == NETDEV_TX_OK)) { 3341 pkt_dev->last_ok = 1; 3342 pkt_dev->sofar++; 3343 pkt_dev->seq_num++; 3344 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size; 3345 3346 } else if (ret == NETDEV_TX_LOCKED 3347 && (odev->features & NETIF_F_LLTX)) { 3348 cpu_relax(); 3349 goto retry_now; 3350 } else { /* Retry it next time */ 3351 3352 atomic_dec(&(pkt_dev->skb->users)); 3353 3354 if (debug && net_ratelimit()) 3355 printk(KERN_INFO "pktgen: Hard xmit error\n"); 3356 3357 pkt_dev->errors++; 3358 pkt_dev->last_ok = 0; 3359 } 3360 3361 pkt_dev->next_tx_us = getCurUs(); 3362 pkt_dev->next_tx_ns = 0; 3363 3364 pkt_dev->next_tx_us += pkt_dev->delay_us; 3365 pkt_dev->next_tx_ns += pkt_dev->delay_ns; 3366 3367 if (pkt_dev->next_tx_ns > 1000) { 3368 pkt_dev->next_tx_us++; 3369 pkt_dev->next_tx_ns -= 1000; 3370 } 3371 } 3372 3373 else { /* Retry it next time */ 3374 pkt_dev->last_ok = 0; 3375 pkt_dev->next_tx_us = getCurUs(); /* TODO */ 3376 pkt_dev->next_tx_ns = 0; 3377 } 3378 3379 netif_tx_unlock_bh(odev); 3380 3381 /* If pkt_dev->count is zero, then run forever */ 3382 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3383 if (atomic_read(&(pkt_dev->skb->users)) != 1) { 3384 idle_start = getCurUs(); 3385 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3386 if (signal_pending(current)) { 3387 break; 3388 } 3389 schedule(); 3390 } 3391 pkt_dev->idle_acc += getCurUs() - idle_start; 3392 } 3393 3394 /* Done with this */ 3395 pktgen_stop_device(pkt_dev); 3396 if (pkt_dev->skb) 3397 kfree_skb(pkt_dev->skb); 3398 pkt_dev->skb = NULL; 3399 } 3400 out:; 3401 } 3402 3403 /* 3404 * Main loop of the thread goes here 3405 */ 3406 3407 static int pktgen_thread_worker(void *arg) 3408 { 3409 DEFINE_WAIT(wait); 3410 struct pktgen_thread *t = arg; 3411 struct pktgen_dev *pkt_dev = NULL; 3412 int cpu = t->cpu; 3413 3414 BUG_ON(smp_processor_id() != cpu); 3415 3416 init_waitqueue_head(&t->queue); 3417 3418 pr_debug("pktgen: starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); 3419 3420 set_current_state(TASK_INTERRUPTIBLE); 3421 3422 set_freezable(); 3423 3424 while (!kthread_should_stop()) { 3425 pkt_dev = next_to_run(t); 3426 3427 if (!pkt_dev && 3428 (t->control & (T_STOP | T_RUN | T_REMDEVALL | T_REMDEV)) 3429 == 0) { 3430 prepare_to_wait(&(t->queue), &wait, 3431 TASK_INTERRUPTIBLE); 3432 schedule_timeout(HZ / 10); 3433 finish_wait(&(t->queue), &wait); 3434 } 3435 3436 __set_current_state(TASK_RUNNING); 3437 3438 if (pkt_dev) 3439 pktgen_xmit(pkt_dev); 3440 3441 if (t->control & T_STOP) { 3442 pktgen_stop(t); 3443 t->control &= ~(T_STOP); 3444 } 3445 3446 if (t->control & T_RUN) { 3447 pktgen_run(t); 3448 t->control &= ~(T_RUN); 3449 } 3450 3451 if (t->control & T_REMDEVALL) { 3452 pktgen_rem_all_ifs(t); 3453 t->control &= ~(T_REMDEVALL); 3454 } 3455 3456 if (t->control & T_REMDEV) { 3457 pktgen_rem_one_if(t); 3458 t->control &= ~(T_REMDEV); 3459 } 3460 3461 try_to_freeze(); 3462 3463 set_current_state(TASK_INTERRUPTIBLE); 3464 } 3465 3466 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm); 3467 pktgen_stop(t); 3468 3469 pr_debug("pktgen: %s removing all device\n", t->tsk->comm); 3470 pktgen_rem_all_ifs(t); 3471 3472 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm); 3473 pktgen_rem_thread(t); 3474 3475 return 0; 3476 } 3477 3478 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3479 const char *ifname) 3480 { 3481 struct pktgen_dev *p, *pkt_dev = NULL; 3482 if_lock(t); 3483 3484 list_for_each_entry(p, &t->if_list, list) 3485 if (strncmp(p->odev->name, ifname, IFNAMSIZ) == 0) { 3486 pkt_dev = p; 3487 break; 3488 } 3489 3490 if_unlock(t); 3491 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev); 3492 return pkt_dev; 3493 } 3494 3495 /* 3496 * Adds a dev at front of if_list. 3497 */ 3498 3499 static int add_dev_to_thread(struct pktgen_thread *t, 3500 struct pktgen_dev *pkt_dev) 3501 { 3502 int rv = 0; 3503 3504 if_lock(t); 3505 3506 if (pkt_dev->pg_thread) { 3507 printk(KERN_ERR "pktgen: ERROR: already assigned " 3508 "to a thread.\n"); 3509 rv = -EBUSY; 3510 goto out; 3511 } 3512 3513 list_add(&pkt_dev->list, &t->if_list); 3514 pkt_dev->pg_thread = t; 3515 pkt_dev->running = 0; 3516 3517 out: 3518 if_unlock(t); 3519 return rv; 3520 } 3521 3522 /* Called under thread lock */ 3523 3524 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3525 { 3526 struct pktgen_dev *pkt_dev; 3527 int err; 3528 3529 /* We don't allow a device to be on several threads */ 3530 3531 pkt_dev = __pktgen_NN_threads(ifname, FIND); 3532 if (pkt_dev) { 3533 printk(KERN_ERR "pktgen: ERROR: interface already used.\n"); 3534 return -EBUSY; 3535 } 3536 3537 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL); 3538 if (!pkt_dev) 3539 return -ENOMEM; 3540 3541 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state)); 3542 if (pkt_dev->flows == NULL) { 3543 kfree(pkt_dev); 3544 return -ENOMEM; 3545 } 3546 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state)); 3547 3548 pkt_dev->removal_mark = 0; 3549 pkt_dev->min_pkt_size = ETH_ZLEN; 3550 pkt_dev->max_pkt_size = ETH_ZLEN; 3551 pkt_dev->nfrags = 0; 3552 pkt_dev->clone_skb = pg_clone_skb_d; 3553 pkt_dev->delay_us = pg_delay_d / 1000; 3554 pkt_dev->delay_ns = pg_delay_d % 1000; 3555 pkt_dev->count = pg_count_d; 3556 pkt_dev->sofar = 0; 3557 pkt_dev->udp_src_min = 9; /* sink port */ 3558 pkt_dev->udp_src_max = 9; 3559 pkt_dev->udp_dst_min = 9; 3560 pkt_dev->udp_dst_max = 9; 3561 3562 pkt_dev->vlan_p = 0; 3563 pkt_dev->vlan_cfi = 0; 3564 pkt_dev->vlan_id = 0xffff; 3565 pkt_dev->svlan_p = 0; 3566 pkt_dev->svlan_cfi = 0; 3567 pkt_dev->svlan_id = 0xffff; 3568 3569 err = pktgen_setup_dev(pkt_dev, ifname); 3570 if (err) 3571 goto out1; 3572 3573 pkt_dev->entry = proc_create(ifname, 0600, 3574 pg_proc_dir, &pktgen_if_fops); 3575 if (!pkt_dev->entry) { 3576 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n", 3577 PG_PROC_DIR, ifname); 3578 err = -EINVAL; 3579 goto out2; 3580 } 3581 pkt_dev->entry->data = pkt_dev; 3582 #ifdef CONFIG_XFRM 3583 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3584 pkt_dev->ipsproto = IPPROTO_ESP; 3585 #endif 3586 3587 return add_dev_to_thread(t, pkt_dev); 3588 out2: 3589 dev_put(pkt_dev->odev); 3590 out1: 3591 #ifdef CONFIG_XFRM 3592 free_SAs(pkt_dev); 3593 #endif 3594 if (pkt_dev->flows) 3595 vfree(pkt_dev->flows); 3596 kfree(pkt_dev); 3597 return err; 3598 } 3599 3600 static int __init pktgen_create_thread(int cpu) 3601 { 3602 struct pktgen_thread *t; 3603 struct proc_dir_entry *pe; 3604 struct task_struct *p; 3605 3606 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL); 3607 if (!t) { 3608 printk(KERN_ERR "pktgen: ERROR: out of memory, can't " 3609 "create new thread.\n"); 3610 return -ENOMEM; 3611 } 3612 3613 spin_lock_init(&t->if_lock); 3614 t->cpu = cpu; 3615 3616 INIT_LIST_HEAD(&t->if_list); 3617 3618 list_add_tail(&t->th_list, &pktgen_threads); 3619 3620 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu); 3621 if (IS_ERR(p)) { 3622 printk(KERN_ERR "pktgen: kernel_thread() failed " 3623 "for cpu %d\n", t->cpu); 3624 list_del(&t->th_list); 3625 kfree(t); 3626 return PTR_ERR(p); 3627 } 3628 kthread_bind(p, cpu); 3629 t->tsk = p; 3630 3631 pe = proc_create(t->tsk->comm, 0600, pg_proc_dir, &pktgen_thread_fops); 3632 if (!pe) { 3633 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n", 3634 PG_PROC_DIR, t->tsk->comm); 3635 kthread_stop(p); 3636 list_del(&t->th_list); 3637 kfree(t); 3638 return -EINVAL; 3639 } 3640 3641 pe->data = t; 3642 3643 wake_up_process(p); 3644 3645 return 0; 3646 } 3647 3648 /* 3649 * Removes a device from the thread if_list. 3650 */ 3651 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3652 struct pktgen_dev *pkt_dev) 3653 { 3654 struct list_head *q, *n; 3655 struct pktgen_dev *p; 3656 3657 list_for_each_safe(q, n, &t->if_list) { 3658 p = list_entry(q, struct pktgen_dev, list); 3659 if (p == pkt_dev) 3660 list_del(&p->list); 3661 } 3662 } 3663 3664 static int pktgen_remove_device(struct pktgen_thread *t, 3665 struct pktgen_dev *pkt_dev) 3666 { 3667 3668 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev); 3669 3670 if (pkt_dev->running) { 3671 printk(KERN_WARNING "pktgen: WARNING: trying to remove a " 3672 "running interface, stopping it now.\n"); 3673 pktgen_stop_device(pkt_dev); 3674 } 3675 3676 /* Dis-associate from the interface */ 3677 3678 if (pkt_dev->odev) { 3679 dev_put(pkt_dev->odev); 3680 pkt_dev->odev = NULL; 3681 } 3682 3683 /* And update the thread if_list */ 3684 3685 _rem_dev_from_if_list(t, pkt_dev); 3686 3687 if (pkt_dev->entry) 3688 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 3689 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 0; 3697 } 3698 3699 static int __init pg_init(void) 3700 { 3701 int cpu; 3702 struct proc_dir_entry *pe; 3703 3704 printk(KERN_INFO "%s", version); 3705 3706 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net); 3707 if (!pg_proc_dir) 3708 return -ENODEV; 3709 pg_proc_dir->owner = THIS_MODULE; 3710 3711 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops); 3712 if (pe == NULL) { 3713 printk(KERN_ERR "pktgen: ERROR: cannot create %s " 3714 "procfs entry.\n", PGCTRL); 3715 proc_net_remove(&init_net, PG_PROC_DIR); 3716 return -EINVAL; 3717 } 3718 3719 pe->data = NULL; 3720 3721 /* Register us to receive netdevice events */ 3722 register_netdevice_notifier(&pktgen_notifier_block); 3723 3724 for_each_online_cpu(cpu) { 3725 int err; 3726 3727 err = pktgen_create_thread(cpu); 3728 if (err) 3729 printk(KERN_WARNING "pktgen: WARNING: Cannot create " 3730 "thread for cpu %d (%d)\n", cpu, err); 3731 } 3732 3733 if (list_empty(&pktgen_threads)) { 3734 printk(KERN_ERR "pktgen: ERROR: Initialization failed for " 3735 "all threads\n"); 3736 unregister_netdevice_notifier(&pktgen_notifier_block); 3737 remove_proc_entry(PGCTRL, pg_proc_dir); 3738 proc_net_remove(&init_net, PG_PROC_DIR); 3739 return -ENODEV; 3740 } 3741 3742 return 0; 3743 } 3744 3745 static void __exit pg_cleanup(void) 3746 { 3747 struct pktgen_thread *t; 3748 struct list_head *q, *n; 3749 wait_queue_head_t queue; 3750 init_waitqueue_head(&queue); 3751 3752 /* Stop all interfaces & threads */ 3753 3754 list_for_each_safe(q, n, &pktgen_threads) { 3755 t = list_entry(q, struct pktgen_thread, th_list); 3756 kthread_stop(t->tsk); 3757 kfree(t); 3758 } 3759 3760 /* Un-register us from receiving netdevice events */ 3761 unregister_netdevice_notifier(&pktgen_notifier_block); 3762 3763 /* Clean up proc file system */ 3764 remove_proc_entry(PGCTRL, pg_proc_dir); 3765 proc_net_remove(&init_net, PG_PROC_DIR); 3766 } 3767 3768 module_init(pg_init); 3769 module_exit(pg_cleanup); 3770 3771 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se"); 3772 MODULE_DESCRIPTION("Packet Generator tool"); 3773 MODULE_LICENSE("GPL"); 3774 module_param(pg_count_d, int, 0); 3775 module_param(pg_delay_d, int, 0); 3776 module_param(pg_clone_skb_d, int, 0); 3777 module_param(debug, int, 0); 3778