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 v2.70: 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 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */ 193 194 /* Thread control flag bits */ 195 #define T_TERMINATE (1<<0) 196 #define T_STOP (1<<1) /* Stop run */ 197 #define T_RUN (1<<2) /* Start run */ 198 #define T_REMDEVALL (1<<3) /* Remove all devs */ 199 #define T_REMDEV (1<<4) /* Remove one dev */ 200 201 /* If lock -- can be removed after some work */ 202 #define if_lock(t) spin_lock(&(t->if_lock)); 203 #define if_unlock(t) spin_unlock(&(t->if_lock)); 204 205 /* Used to help with determining the pkts on receive */ 206 #define PKTGEN_MAGIC 0xbe9be955 207 #define PG_PROC_DIR "pktgen" 208 #define PGCTRL "pgctrl" 209 static struct proc_dir_entry *pg_proc_dir = NULL; 210 211 #define MAX_CFLOWS 65536 212 213 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4) 214 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4) 215 216 struct flow_state { 217 __be32 cur_daddr; 218 int count; 219 #ifdef CONFIG_XFRM 220 struct xfrm_state *x; 221 #endif 222 __u32 flags; 223 }; 224 225 /* flow flag bits */ 226 #define F_INIT (1<<0) /* flow has been initialized */ 227 228 struct pktgen_dev { 229 /* 230 * Try to keep frequent/infrequent used vars. separated. 231 */ 232 struct proc_dir_entry *entry; /* proc file */ 233 struct pktgen_thread *pg_thread;/* the owner */ 234 struct list_head list; /* Used for chaining in the thread's run-queue */ 235 236 int running; /* if this changes to false, the test will stop */ 237 238 /* If min != max, then we will either do a linear iteration, or 239 * we will do a random selection from within the range. 240 */ 241 __u32 flags; 242 int removal_mark; /* non-zero => the device is marked for 243 * removal by worker thread */ 244 245 int min_pkt_size; /* = ETH_ZLEN; */ 246 int max_pkt_size; /* = ETH_ZLEN; */ 247 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */ 248 int nfrags; 249 __u32 delay_us; /* Default delay */ 250 __u32 delay_ns; 251 __u64 count; /* Default No packets to send */ 252 __u64 sofar; /* How many pkts we've sent so far */ 253 __u64 tx_bytes; /* How many bytes we've transmitted */ 254 __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */ 255 256 /* runtime counters relating to clone_skb */ 257 __u64 next_tx_us; /* timestamp of when to tx next */ 258 __u32 next_tx_ns; 259 260 __u64 allocated_skbs; 261 __u32 clone_count; 262 int last_ok; /* Was last skb sent? 263 * Or a failed transmit of some sort? This will keep 264 * sequence numbers in order, for example. 265 */ 266 __u64 started_at; /* micro-seconds */ 267 __u64 stopped_at; /* micro-seconds */ 268 __u64 idle_acc; /* micro-seconds */ 269 __u32 seq_num; 270 271 int clone_skb; /* Use multiple SKBs during packet gen. If this number 272 * is greater than 1, then that many copies of the same 273 * packet will be sent before a new packet is allocated. 274 * For instance, if you want to send 1024 identical packets 275 * before creating a new packet, set clone_skb to 1024. 276 */ 277 278 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 279 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 280 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 281 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 282 283 struct in6_addr in6_saddr; 284 struct in6_addr in6_daddr; 285 struct in6_addr cur_in6_daddr; 286 struct in6_addr cur_in6_saddr; 287 /* For ranges */ 288 struct in6_addr min_in6_daddr; 289 struct in6_addr max_in6_daddr; 290 struct in6_addr min_in6_saddr; 291 struct in6_addr max_in6_saddr; 292 293 /* If we're doing ranges, random or incremental, then this 294 * defines the min/max for those ranges. 295 */ 296 __be32 saddr_min; /* inclusive, source IP address */ 297 __be32 saddr_max; /* exclusive, source IP address */ 298 __be32 daddr_min; /* inclusive, dest IP address */ 299 __be32 daddr_max; /* exclusive, dest IP address */ 300 301 __u16 udp_src_min; /* inclusive, source UDP port */ 302 __u16 udp_src_max; /* exclusive, source UDP port */ 303 __u16 udp_dst_min; /* inclusive, dest UDP port */ 304 __u16 udp_dst_max; /* exclusive, dest UDP port */ 305 306 /* DSCP + ECN */ 307 __u8 tos; /* six most significant bits of (former) IPv4 TOS are for dscp codepoint */ 308 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 (see RFC 3260, sec. 4) */ 309 310 /* MPLS */ 311 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */ 312 __be32 labels[MAX_MPLS_LABELS]; 313 314 /* VLAN/SVLAN (802.1Q/Q-in-Q) */ 315 __u8 vlan_p; 316 __u8 vlan_cfi; 317 __u16 vlan_id; /* 0xffff means no vlan tag */ 318 319 __u8 svlan_p; 320 __u8 svlan_cfi; 321 __u16 svlan_id; /* 0xffff means no svlan tag */ 322 323 __u32 src_mac_count; /* How many MACs to iterate through */ 324 __u32 dst_mac_count; /* How many MACs to iterate through */ 325 326 unsigned char dst_mac[ETH_ALEN]; 327 unsigned char src_mac[ETH_ALEN]; 328 329 __u32 cur_dst_mac_offset; 330 __u32 cur_src_mac_offset; 331 __be32 cur_saddr; 332 __be32 cur_daddr; 333 __u16 cur_udp_dst; 334 __u16 cur_udp_src; 335 __u16 cur_queue_map; 336 __u32 cur_pkt_size; 337 338 __u8 hh[14]; 339 /* = { 340 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, 341 342 We fill in SRC address later 343 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 344 0x08, 0x00 345 }; 346 */ 347 __u16 pad; /* pad out the hh struct to an even 16 bytes */ 348 349 struct sk_buff *skb; /* skb we are to transmit next, mainly used for when we 350 * are transmitting the same one multiple times 351 */ 352 struct net_device *odev; /* The out-going device. Note that the device should 353 * have it's pg_info pointer pointing back to this 354 * device. This will be set when the user specifies 355 * the out-going device name (not when the inject is 356 * started as it used to do.) 357 */ 358 struct flow_state *flows; 359 unsigned cflows; /* Concurrent flows (config) */ 360 unsigned lflow; /* Flow length (config) */ 361 unsigned nflows; /* accumulated flows (stats) */ 362 unsigned curfl; /* current sequenced flow (state)*/ 363 364 u16 queue_map_min; 365 u16 queue_map_max; 366 367 #ifdef CONFIG_XFRM 368 __u8 ipsmode; /* IPSEC mode (config) */ 369 __u8 ipsproto; /* IPSEC type (config) */ 370 #endif 371 char result[512]; 372 }; 373 374 struct pktgen_hdr { 375 __be32 pgh_magic; 376 __be32 seq_num; 377 __be32 tv_sec; 378 __be32 tv_usec; 379 }; 380 381 struct pktgen_thread { 382 spinlock_t if_lock; 383 struct list_head if_list; /* All device here */ 384 struct list_head th_list; 385 struct task_struct *tsk; 386 char result[512]; 387 388 /* Field for thread to receive "posted" events terminate, stop ifs etc. */ 389 390 u32 control; 391 int cpu; 392 393 wait_queue_head_t queue; 394 struct completion start_done; 395 }; 396 397 #define REMOVE 1 398 #define FIND 0 399 400 /** Convert to micro-seconds */ 401 static inline __u64 tv_to_us(const struct timeval *tv) 402 { 403 __u64 us = tv->tv_usec; 404 us += (__u64) tv->tv_sec * (__u64) 1000000; 405 return us; 406 } 407 408 static __u64 getCurUs(void) 409 { 410 struct timeval tv; 411 do_gettimeofday(&tv); 412 return tv_to_us(&tv); 413 } 414 415 /* old include end */ 416 417 static char version[] __initdata = VERSION; 418 419 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i); 420 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname); 421 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 422 const char *ifname); 423 static int pktgen_device_event(struct notifier_block *, unsigned long, void *); 424 static void pktgen_run_all_threads(void); 425 static void pktgen_stop_all_threads_ifs(void); 426 static int pktgen_stop_device(struct pktgen_dev *pkt_dev); 427 static void pktgen_stop(struct pktgen_thread *t); 428 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); 429 430 static unsigned int scan_ip6(const char *s, char ip[16]); 431 static unsigned int fmt_ip6(char *s, const char ip[16]); 432 433 /* Module parameters, defaults. */ 434 static int pg_count_d = 1000; /* 1000 pkts by default */ 435 static int pg_delay_d; 436 static int pg_clone_skb_d; 437 static int debug; 438 439 static DEFINE_MUTEX(pktgen_thread_lock); 440 static LIST_HEAD(pktgen_threads); 441 442 static struct notifier_block pktgen_notifier_block = { 443 .notifier_call = pktgen_device_event, 444 }; 445 446 /* 447 * /proc handling functions 448 * 449 */ 450 451 static int pgctrl_show(struct seq_file *seq, void *v) 452 { 453 seq_puts(seq, VERSION); 454 return 0; 455 } 456 457 static ssize_t pgctrl_write(struct file *file, const char __user * buf, 458 size_t count, loff_t * ppos) 459 { 460 int err = 0; 461 char data[128]; 462 463 if (!capable(CAP_NET_ADMIN)) { 464 err = -EPERM; 465 goto out; 466 } 467 468 if (count > sizeof(data)) 469 count = sizeof(data); 470 471 if (copy_from_user(data, buf, count)) { 472 err = -EFAULT; 473 goto out; 474 } 475 data[count - 1] = 0; /* Make string */ 476 477 if (!strcmp(data, "stop")) 478 pktgen_stop_all_threads_ifs(); 479 480 else if (!strcmp(data, "start")) 481 pktgen_run_all_threads(); 482 483 else 484 printk(KERN_WARNING "pktgen: Unknown command: %s\n", data); 485 486 err = count; 487 488 out: 489 return err; 490 } 491 492 static int pgctrl_open(struct inode *inode, struct file *file) 493 { 494 return single_open(file, pgctrl_show, PDE(inode)->data); 495 } 496 497 static const struct file_operations pktgen_fops = { 498 .owner = THIS_MODULE, 499 .open = pgctrl_open, 500 .read = seq_read, 501 .llseek = seq_lseek, 502 .write = pgctrl_write, 503 .release = single_release, 504 }; 505 506 static int pktgen_if_show(struct seq_file *seq, void *v) 507 { 508 struct pktgen_dev *pkt_dev = seq->private; 509 __u64 sa; 510 __u64 stopped; 511 __u64 now = getCurUs(); 512 DECLARE_MAC_BUF(mac); 513 514 seq_printf(seq, 515 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", 516 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, 517 pkt_dev->max_pkt_size); 518 519 seq_printf(seq, 520 " frags: %d delay: %u clone_skb: %d ifname: %s\n", 521 pkt_dev->nfrags, 522 1000 * pkt_dev->delay_us + pkt_dev->delay_ns, 523 pkt_dev->clone_skb, pkt_dev->odev->name); 524 525 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, 526 pkt_dev->lflow); 527 528 seq_printf(seq, 529 " queue_map_min: %u queue_map_max: %u\n", 530 pkt_dev->queue_map_min, 531 pkt_dev->queue_map_max); 532 533 if (pkt_dev->flags & F_IPV6) { 534 char b1[128], b2[128], b3[128]; 535 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr); 536 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr); 537 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr); 538 seq_printf(seq, 539 " saddr: %s min_saddr: %s max_saddr: %s\n", b1, 540 b2, b3); 541 542 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr); 543 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr); 544 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr); 545 seq_printf(seq, 546 " daddr: %s min_daddr: %s max_daddr: %s\n", b1, 547 b2, b3); 548 549 } else 550 seq_printf(seq, 551 " dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n", 552 pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min, 553 pkt_dev->src_max); 554 555 seq_puts(seq, " src_mac: "); 556 557 seq_printf(seq, "%s ", 558 print_mac(mac, is_zero_ether_addr(pkt_dev->src_mac) ? 559 pkt_dev->odev->dev_addr : pkt_dev->src_mac)); 560 561 seq_printf(seq, "dst_mac: "); 562 seq_printf(seq, "%s\n", print_mac(mac, pkt_dev->dst_mac)); 563 564 seq_printf(seq, 565 " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n", 566 pkt_dev->udp_src_min, pkt_dev->udp_src_max, 567 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); 568 569 seq_printf(seq, 570 " src_mac_count: %d dst_mac_count: %d\n", 571 pkt_dev->src_mac_count, pkt_dev->dst_mac_count); 572 573 if (pkt_dev->nr_labels) { 574 unsigned i; 575 seq_printf(seq, " mpls: "); 576 for (i = 0; i < pkt_dev->nr_labels; i++) 577 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), 578 i == pkt_dev->nr_labels-1 ? "\n" : ", "); 579 } 580 581 if (pkt_dev->vlan_id != 0xffff) { 582 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", 583 pkt_dev->vlan_id, pkt_dev->vlan_p, pkt_dev->vlan_cfi); 584 } 585 586 if (pkt_dev->svlan_id != 0xffff) { 587 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", 588 pkt_dev->svlan_id, pkt_dev->svlan_p, pkt_dev->svlan_cfi); 589 } 590 591 if (pkt_dev->tos) { 592 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); 593 } 594 595 if (pkt_dev->traffic_class) { 596 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); 597 } 598 599 seq_printf(seq, " Flags: "); 600 601 if (pkt_dev->flags & F_IPV6) 602 seq_printf(seq, "IPV6 "); 603 604 if (pkt_dev->flags & F_IPSRC_RND) 605 seq_printf(seq, "IPSRC_RND "); 606 607 if (pkt_dev->flags & F_IPDST_RND) 608 seq_printf(seq, "IPDST_RND "); 609 610 if (pkt_dev->flags & F_TXSIZE_RND) 611 seq_printf(seq, "TXSIZE_RND "); 612 613 if (pkt_dev->flags & F_UDPSRC_RND) 614 seq_printf(seq, "UDPSRC_RND "); 615 616 if (pkt_dev->flags & F_UDPDST_RND) 617 seq_printf(seq, "UDPDST_RND "); 618 619 if (pkt_dev->flags & F_MPLS_RND) 620 seq_printf(seq, "MPLS_RND "); 621 622 if (pkt_dev->flags & F_QUEUE_MAP_RND) 623 seq_printf(seq, "QUEUE_MAP_RND "); 624 625 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 626 seq_printf(seq, "QUEUE_MAP_CPU "); 627 628 if (pkt_dev->cflows) { 629 if (pkt_dev->flags & F_FLOW_SEQ) 630 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/ 631 else 632 seq_printf(seq, "FLOW_RND "); 633 } 634 635 #ifdef CONFIG_XFRM 636 if (pkt_dev->flags & F_IPSEC_ON) 637 seq_printf(seq, "IPSEC "); 638 #endif 639 640 if (pkt_dev->flags & F_MACSRC_RND) 641 seq_printf(seq, "MACSRC_RND "); 642 643 if (pkt_dev->flags & F_MACDST_RND) 644 seq_printf(seq, "MACDST_RND "); 645 646 if (pkt_dev->flags & F_VID_RND) 647 seq_printf(seq, "VID_RND "); 648 649 if (pkt_dev->flags & F_SVID_RND) 650 seq_printf(seq, "SVID_RND "); 651 652 seq_puts(seq, "\n"); 653 654 sa = pkt_dev->started_at; 655 stopped = pkt_dev->stopped_at; 656 if (pkt_dev->running) 657 stopped = now; /* not really stopped, more like last-running-at */ 658 659 seq_printf(seq, 660 "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n", 661 (unsigned long long)pkt_dev->sofar, 662 (unsigned long long)pkt_dev->errors, (unsigned long long)sa, 663 (unsigned long long)stopped, 664 (unsigned long long)pkt_dev->idle_acc); 665 666 seq_printf(seq, 667 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 668 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, 669 pkt_dev->cur_src_mac_offset); 670 671 if (pkt_dev->flags & F_IPV6) { 672 char b1[128], b2[128]; 673 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr); 674 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr); 675 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1); 676 } else 677 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n", 678 pkt_dev->cur_saddr, pkt_dev->cur_daddr); 679 680 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", 681 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 682 683 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); 684 685 seq_printf(seq, " flows: %u\n", pkt_dev->nflows); 686 687 if (pkt_dev->result[0]) 688 seq_printf(seq, "Result: %s\n", pkt_dev->result); 689 else 690 seq_printf(seq, "Result: Idle\n"); 691 692 return 0; 693 } 694 695 696 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, __u32 *num) 697 { 698 int i = 0; 699 *num = 0; 700 701 for (; i < maxlen; i++) { 702 char c; 703 *num <<= 4; 704 if (get_user(c, &user_buffer[i])) 705 return -EFAULT; 706 if ((c >= '0') && (c <= '9')) 707 *num |= c - '0'; 708 else if ((c >= 'a') && (c <= 'f')) 709 *num |= c - 'a' + 10; 710 else if ((c >= 'A') && (c <= 'F')) 711 *num |= c - 'A' + 10; 712 else 713 break; 714 } 715 return i; 716 } 717 718 static int count_trail_chars(const char __user * user_buffer, 719 unsigned int maxlen) 720 { 721 int i; 722 723 for (i = 0; i < maxlen; i++) { 724 char c; 725 if (get_user(c, &user_buffer[i])) 726 return -EFAULT; 727 switch (c) { 728 case '\"': 729 case '\n': 730 case '\r': 731 case '\t': 732 case ' ': 733 case '=': 734 break; 735 default: 736 goto done; 737 } 738 } 739 done: 740 return i; 741 } 742 743 static unsigned long num_arg(const char __user * user_buffer, 744 unsigned long maxlen, unsigned long *num) 745 { 746 int i = 0; 747 *num = 0; 748 749 for (; i < maxlen; i++) { 750 char c; 751 if (get_user(c, &user_buffer[i])) 752 return -EFAULT; 753 if ((c >= '0') && (c <= '9')) { 754 *num *= 10; 755 *num += c - '0'; 756 } else 757 break; 758 } 759 return i; 760 } 761 762 static int strn_len(const char __user * user_buffer, unsigned int maxlen) 763 { 764 int i = 0; 765 766 for (; i < maxlen; i++) { 767 char c; 768 if (get_user(c, &user_buffer[i])) 769 return -EFAULT; 770 switch (c) { 771 case '\"': 772 case '\n': 773 case '\r': 774 case '\t': 775 case ' ': 776 goto done_str; 777 break; 778 default: 779 break; 780 } 781 } 782 done_str: 783 return i; 784 } 785 786 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) 787 { 788 unsigned n = 0; 789 char c; 790 ssize_t i = 0; 791 int len; 792 793 pkt_dev->nr_labels = 0; 794 do { 795 __u32 tmp; 796 len = hex32_arg(&buffer[i], 8, &tmp); 797 if (len <= 0) 798 return len; 799 pkt_dev->labels[n] = htonl(tmp); 800 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 801 pkt_dev->flags |= F_MPLS_RND; 802 i += len; 803 if (get_user(c, &buffer[i])) 804 return -EFAULT; 805 i++; 806 n++; 807 if (n >= MAX_MPLS_LABELS) 808 return -E2BIG; 809 } while (c == ','); 810 811 pkt_dev->nr_labels = n; 812 return i; 813 } 814 815 static ssize_t pktgen_if_write(struct file *file, 816 const char __user * user_buffer, size_t count, 817 loff_t * offset) 818 { 819 struct seq_file *seq = (struct seq_file *)file->private_data; 820 struct pktgen_dev *pkt_dev = seq->private; 821 int i = 0, max, len; 822 char name[16], valstr[32]; 823 unsigned long value = 0; 824 char *pg_result = NULL; 825 int tmp = 0; 826 char buf[128]; 827 828 pg_result = &(pkt_dev->result[0]); 829 830 if (count < 1) { 831 printk(KERN_WARNING "pktgen: wrong command format\n"); 832 return -EINVAL; 833 } 834 835 max = count - i; 836 tmp = count_trail_chars(&user_buffer[i], max); 837 if (tmp < 0) { 838 printk(KERN_WARNING "pktgen: illegal format\n"); 839 return tmp; 840 } 841 i += tmp; 842 843 /* Read variable name */ 844 845 len = strn_len(&user_buffer[i], sizeof(name) - 1); 846 if (len < 0) { 847 return len; 848 } 849 memset(name, 0, sizeof(name)); 850 if (copy_from_user(name, &user_buffer[i], len)) 851 return -EFAULT; 852 i += len; 853 854 max = count - i; 855 len = count_trail_chars(&user_buffer[i], max); 856 if (len < 0) 857 return len; 858 859 i += len; 860 861 if (debug) { 862 char tb[count + 1]; 863 if (copy_from_user(tb, user_buffer, count)) 864 return -EFAULT; 865 tb[count] = 0; 866 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name, 867 (unsigned long)count, tb); 868 } 869 870 if (!strcmp(name, "min_pkt_size")) { 871 len = num_arg(&user_buffer[i], 10, &value); 872 if (len < 0) { 873 return len; 874 } 875 i += len; 876 if (value < 14 + 20 + 8) 877 value = 14 + 20 + 8; 878 if (value != pkt_dev->min_pkt_size) { 879 pkt_dev->min_pkt_size = value; 880 pkt_dev->cur_pkt_size = value; 881 } 882 sprintf(pg_result, "OK: min_pkt_size=%u", 883 pkt_dev->min_pkt_size); 884 return count; 885 } 886 887 if (!strcmp(name, "max_pkt_size")) { 888 len = num_arg(&user_buffer[i], 10, &value); 889 if (len < 0) { 890 return len; 891 } 892 i += len; 893 if (value < 14 + 20 + 8) 894 value = 14 + 20 + 8; 895 if (value != pkt_dev->max_pkt_size) { 896 pkt_dev->max_pkt_size = value; 897 pkt_dev->cur_pkt_size = value; 898 } 899 sprintf(pg_result, "OK: max_pkt_size=%u", 900 pkt_dev->max_pkt_size); 901 return count; 902 } 903 904 /* Shortcut for min = max */ 905 906 if (!strcmp(name, "pkt_size")) { 907 len = num_arg(&user_buffer[i], 10, &value); 908 if (len < 0) { 909 return len; 910 } 911 i += len; 912 if (value < 14 + 20 + 8) 913 value = 14 + 20 + 8; 914 if (value != pkt_dev->min_pkt_size) { 915 pkt_dev->min_pkt_size = value; 916 pkt_dev->max_pkt_size = value; 917 pkt_dev->cur_pkt_size = value; 918 } 919 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 920 return count; 921 } 922 923 if (!strcmp(name, "debug")) { 924 len = num_arg(&user_buffer[i], 10, &value); 925 if (len < 0) { 926 return len; 927 } 928 i += len; 929 debug = value; 930 sprintf(pg_result, "OK: debug=%u", debug); 931 return count; 932 } 933 934 if (!strcmp(name, "frags")) { 935 len = num_arg(&user_buffer[i], 10, &value); 936 if (len < 0) { 937 return len; 938 } 939 i += len; 940 pkt_dev->nfrags = value; 941 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 942 return count; 943 } 944 if (!strcmp(name, "delay")) { 945 len = num_arg(&user_buffer[i], 10, &value); 946 if (len < 0) { 947 return len; 948 } 949 i += len; 950 if (value == 0x7FFFFFFF) { 951 pkt_dev->delay_us = 0x7FFFFFFF; 952 pkt_dev->delay_ns = 0; 953 } else { 954 pkt_dev->delay_us = value / 1000; 955 pkt_dev->delay_ns = value % 1000; 956 } 957 sprintf(pg_result, "OK: delay=%u", 958 1000 * pkt_dev->delay_us + pkt_dev->delay_ns); 959 return count; 960 } 961 if (!strcmp(name, "udp_src_min")) { 962 len = num_arg(&user_buffer[i], 10, &value); 963 if (len < 0) { 964 return len; 965 } 966 i += len; 967 if (value != pkt_dev->udp_src_min) { 968 pkt_dev->udp_src_min = value; 969 pkt_dev->cur_udp_src = value; 970 } 971 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 972 return count; 973 } 974 if (!strcmp(name, "udp_dst_min")) { 975 len = num_arg(&user_buffer[i], 10, &value); 976 if (len < 0) { 977 return len; 978 } 979 i += len; 980 if (value != pkt_dev->udp_dst_min) { 981 pkt_dev->udp_dst_min = value; 982 pkt_dev->cur_udp_dst = value; 983 } 984 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 985 return count; 986 } 987 if (!strcmp(name, "udp_src_max")) { 988 len = num_arg(&user_buffer[i], 10, &value); 989 if (len < 0) { 990 return len; 991 } 992 i += len; 993 if (value != pkt_dev->udp_src_max) { 994 pkt_dev->udp_src_max = value; 995 pkt_dev->cur_udp_src = value; 996 } 997 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 998 return count; 999 } 1000 if (!strcmp(name, "udp_dst_max")) { 1001 len = num_arg(&user_buffer[i], 10, &value); 1002 if (len < 0) { 1003 return len; 1004 } 1005 i += len; 1006 if (value != pkt_dev->udp_dst_max) { 1007 pkt_dev->udp_dst_max = value; 1008 pkt_dev->cur_udp_dst = value; 1009 } 1010 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1011 return count; 1012 } 1013 if (!strcmp(name, "clone_skb")) { 1014 len = num_arg(&user_buffer[i], 10, &value); 1015 if (len < 0) { 1016 return len; 1017 } 1018 i += len; 1019 pkt_dev->clone_skb = value; 1020 1021 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1022 return count; 1023 } 1024 if (!strcmp(name, "count")) { 1025 len = num_arg(&user_buffer[i], 10, &value); 1026 if (len < 0) { 1027 return len; 1028 } 1029 i += len; 1030 pkt_dev->count = value; 1031 sprintf(pg_result, "OK: count=%llu", 1032 (unsigned long long)pkt_dev->count); 1033 return count; 1034 } 1035 if (!strcmp(name, "src_mac_count")) { 1036 len = num_arg(&user_buffer[i], 10, &value); 1037 if (len < 0) { 1038 return len; 1039 } 1040 i += len; 1041 if (pkt_dev->src_mac_count != value) { 1042 pkt_dev->src_mac_count = value; 1043 pkt_dev->cur_src_mac_offset = 0; 1044 } 1045 sprintf(pg_result, "OK: src_mac_count=%d", 1046 pkt_dev->src_mac_count); 1047 return count; 1048 } 1049 if (!strcmp(name, "dst_mac_count")) { 1050 len = num_arg(&user_buffer[i], 10, &value); 1051 if (len < 0) { 1052 return len; 1053 } 1054 i += len; 1055 if (pkt_dev->dst_mac_count != value) { 1056 pkt_dev->dst_mac_count = value; 1057 pkt_dev->cur_dst_mac_offset = 0; 1058 } 1059 sprintf(pg_result, "OK: dst_mac_count=%d", 1060 pkt_dev->dst_mac_count); 1061 return count; 1062 } 1063 if (!strcmp(name, "flag")) { 1064 char f[32]; 1065 memset(f, 0, 32); 1066 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1067 if (len < 0) { 1068 return len; 1069 } 1070 if (copy_from_user(f, &user_buffer[i], len)) 1071 return -EFAULT; 1072 i += len; 1073 if (strcmp(f, "IPSRC_RND") == 0) 1074 pkt_dev->flags |= F_IPSRC_RND; 1075 1076 else if (strcmp(f, "!IPSRC_RND") == 0) 1077 pkt_dev->flags &= ~F_IPSRC_RND; 1078 1079 else if (strcmp(f, "TXSIZE_RND") == 0) 1080 pkt_dev->flags |= F_TXSIZE_RND; 1081 1082 else if (strcmp(f, "!TXSIZE_RND") == 0) 1083 pkt_dev->flags &= ~F_TXSIZE_RND; 1084 1085 else if (strcmp(f, "IPDST_RND") == 0) 1086 pkt_dev->flags |= F_IPDST_RND; 1087 1088 else if (strcmp(f, "!IPDST_RND") == 0) 1089 pkt_dev->flags &= ~F_IPDST_RND; 1090 1091 else if (strcmp(f, "UDPSRC_RND") == 0) 1092 pkt_dev->flags |= F_UDPSRC_RND; 1093 1094 else if (strcmp(f, "!UDPSRC_RND") == 0) 1095 pkt_dev->flags &= ~F_UDPSRC_RND; 1096 1097 else if (strcmp(f, "UDPDST_RND") == 0) 1098 pkt_dev->flags |= F_UDPDST_RND; 1099 1100 else if (strcmp(f, "!UDPDST_RND") == 0) 1101 pkt_dev->flags &= ~F_UDPDST_RND; 1102 1103 else if (strcmp(f, "MACSRC_RND") == 0) 1104 pkt_dev->flags |= F_MACSRC_RND; 1105 1106 else if (strcmp(f, "!MACSRC_RND") == 0) 1107 pkt_dev->flags &= ~F_MACSRC_RND; 1108 1109 else if (strcmp(f, "MACDST_RND") == 0) 1110 pkt_dev->flags |= F_MACDST_RND; 1111 1112 else if (strcmp(f, "!MACDST_RND") == 0) 1113 pkt_dev->flags &= ~F_MACDST_RND; 1114 1115 else if (strcmp(f, "MPLS_RND") == 0) 1116 pkt_dev->flags |= F_MPLS_RND; 1117 1118 else if (strcmp(f, "!MPLS_RND") == 0) 1119 pkt_dev->flags &= ~F_MPLS_RND; 1120 1121 else if (strcmp(f, "VID_RND") == 0) 1122 pkt_dev->flags |= F_VID_RND; 1123 1124 else if (strcmp(f, "!VID_RND") == 0) 1125 pkt_dev->flags &= ~F_VID_RND; 1126 1127 else if (strcmp(f, "SVID_RND") == 0) 1128 pkt_dev->flags |= F_SVID_RND; 1129 1130 else if (strcmp(f, "!SVID_RND") == 0) 1131 pkt_dev->flags &= ~F_SVID_RND; 1132 1133 else if (strcmp(f, "FLOW_SEQ") == 0) 1134 pkt_dev->flags |= F_FLOW_SEQ; 1135 1136 else if (strcmp(f, "QUEUE_MAP_RND") == 0) 1137 pkt_dev->flags |= F_QUEUE_MAP_RND; 1138 1139 else if (strcmp(f, "!QUEUE_MAP_RND") == 0) 1140 pkt_dev->flags &= ~F_QUEUE_MAP_RND; 1141 1142 else if (strcmp(f, "QUEUE_MAP_CPU") == 0) 1143 pkt_dev->flags |= F_QUEUE_MAP_CPU; 1144 1145 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0) 1146 pkt_dev->flags &= ~F_QUEUE_MAP_CPU; 1147 #ifdef CONFIG_XFRM 1148 else if (strcmp(f, "IPSEC") == 0) 1149 pkt_dev->flags |= F_IPSEC_ON; 1150 #endif 1151 1152 else if (strcmp(f, "!IPV6") == 0) 1153 pkt_dev->flags &= ~F_IPV6; 1154 1155 else { 1156 sprintf(pg_result, 1157 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1158 f, 1159 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1160 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC\n"); 1161 return count; 1162 } 1163 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1164 return count; 1165 } 1166 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1167 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1168 if (len < 0) { 1169 return len; 1170 } 1171 1172 if (copy_from_user(buf, &user_buffer[i], len)) 1173 return -EFAULT; 1174 buf[len] = 0; 1175 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1176 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1177 strncpy(pkt_dev->dst_min, buf, len); 1178 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1179 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1180 } 1181 if (debug) 1182 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n", 1183 pkt_dev->dst_min); 1184 i += len; 1185 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1186 return count; 1187 } 1188 if (!strcmp(name, "dst_max")) { 1189 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1190 if (len < 0) { 1191 return len; 1192 } 1193 1194 if (copy_from_user(buf, &user_buffer[i], len)) 1195 return -EFAULT; 1196 1197 buf[len] = 0; 1198 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1199 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1200 strncpy(pkt_dev->dst_max, buf, len); 1201 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1202 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1203 } 1204 if (debug) 1205 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n", 1206 pkt_dev->dst_max); 1207 i += len; 1208 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1209 return count; 1210 } 1211 if (!strcmp(name, "dst6")) { 1212 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1213 if (len < 0) 1214 return len; 1215 1216 pkt_dev->flags |= F_IPV6; 1217 1218 if (copy_from_user(buf, &user_buffer[i], len)) 1219 return -EFAULT; 1220 buf[len] = 0; 1221 1222 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1223 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1224 1225 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr); 1226 1227 if (debug) 1228 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf); 1229 1230 i += len; 1231 sprintf(pg_result, "OK: dst6=%s", buf); 1232 return count; 1233 } 1234 if (!strcmp(name, "dst6_min")) { 1235 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1236 if (len < 0) 1237 return len; 1238 1239 pkt_dev->flags |= F_IPV6; 1240 1241 if (copy_from_user(buf, &user_buffer[i], len)) 1242 return -EFAULT; 1243 buf[len] = 0; 1244 1245 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1246 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1247 1248 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, 1249 &pkt_dev->min_in6_daddr); 1250 if (debug) 1251 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf); 1252 1253 i += len; 1254 sprintf(pg_result, "OK: dst6_min=%s", buf); 1255 return count; 1256 } 1257 if (!strcmp(name, "dst6_max")) { 1258 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1259 if (len < 0) 1260 return len; 1261 1262 pkt_dev->flags |= F_IPV6; 1263 1264 if (copy_from_user(buf, &user_buffer[i], len)) 1265 return -EFAULT; 1266 buf[len] = 0; 1267 1268 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1269 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1270 1271 if (debug) 1272 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf); 1273 1274 i += len; 1275 sprintf(pg_result, "OK: dst6_max=%s", buf); 1276 return count; 1277 } 1278 if (!strcmp(name, "src6")) { 1279 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1280 if (len < 0) 1281 return len; 1282 1283 pkt_dev->flags |= F_IPV6; 1284 1285 if (copy_from_user(buf, &user_buffer[i], len)) 1286 return -EFAULT; 1287 buf[len] = 0; 1288 1289 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1290 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1291 1292 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr); 1293 1294 if (debug) 1295 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf); 1296 1297 i += len; 1298 sprintf(pg_result, "OK: src6=%s", buf); 1299 return count; 1300 } 1301 if (!strcmp(name, "src_min")) { 1302 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1303 if (len < 0) { 1304 return len; 1305 } 1306 if (copy_from_user(buf, &user_buffer[i], len)) 1307 return -EFAULT; 1308 buf[len] = 0; 1309 if (strcmp(buf, pkt_dev->src_min) != 0) { 1310 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1311 strncpy(pkt_dev->src_min, buf, len); 1312 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1313 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1314 } 1315 if (debug) 1316 printk(KERN_DEBUG "pktgen: src_min set to: %s\n", 1317 pkt_dev->src_min); 1318 i += len; 1319 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1320 return count; 1321 } 1322 if (!strcmp(name, "src_max")) { 1323 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1324 if (len < 0) { 1325 return len; 1326 } 1327 if (copy_from_user(buf, &user_buffer[i], len)) 1328 return -EFAULT; 1329 buf[len] = 0; 1330 if (strcmp(buf, pkt_dev->src_max) != 0) { 1331 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1332 strncpy(pkt_dev->src_max, buf, len); 1333 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1334 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1335 } 1336 if (debug) 1337 printk(KERN_DEBUG "pktgen: src_max set to: %s\n", 1338 pkt_dev->src_max); 1339 i += len; 1340 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1341 return count; 1342 } 1343 if (!strcmp(name, "dst_mac")) { 1344 char *v = valstr; 1345 unsigned char old_dmac[ETH_ALEN]; 1346 unsigned char *m = pkt_dev->dst_mac; 1347 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN); 1348 1349 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1350 if (len < 0) { 1351 return len; 1352 } 1353 memset(valstr, 0, sizeof(valstr)); 1354 if (copy_from_user(valstr, &user_buffer[i], len)) 1355 return -EFAULT; 1356 i += len; 1357 1358 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) { 1359 if (*v >= '0' && *v <= '9') { 1360 *m *= 16; 1361 *m += *v - '0'; 1362 } 1363 if (*v >= 'A' && *v <= 'F') { 1364 *m *= 16; 1365 *m += *v - 'A' + 10; 1366 } 1367 if (*v >= 'a' && *v <= 'f') { 1368 *m *= 16; 1369 *m += *v - 'a' + 10; 1370 } 1371 if (*v == ':') { 1372 m++; 1373 *m = 0; 1374 } 1375 } 1376 1377 /* Set up Dest MAC */ 1378 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac)) 1379 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 1380 1381 sprintf(pg_result, "OK: dstmac"); 1382 return count; 1383 } 1384 if (!strcmp(name, "src_mac")) { 1385 char *v = valstr; 1386 unsigned char old_smac[ETH_ALEN]; 1387 unsigned char *m = pkt_dev->src_mac; 1388 1389 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN); 1390 1391 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1392 if (len < 0) { 1393 return len; 1394 } 1395 memset(valstr, 0, sizeof(valstr)); 1396 if (copy_from_user(valstr, &user_buffer[i], len)) 1397 return -EFAULT; 1398 i += len; 1399 1400 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) { 1401 if (*v >= '0' && *v <= '9') { 1402 *m *= 16; 1403 *m += *v - '0'; 1404 } 1405 if (*v >= 'A' && *v <= 'F') { 1406 *m *= 16; 1407 *m += *v - 'A' + 10; 1408 } 1409 if (*v >= 'a' && *v <= 'f') { 1410 *m *= 16; 1411 *m += *v - 'a' + 10; 1412 } 1413 if (*v == ':') { 1414 m++; 1415 *m = 0; 1416 } 1417 } 1418 1419 /* Set up Src MAC */ 1420 if (compare_ether_addr(old_smac, pkt_dev->src_mac)) 1421 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN); 1422 1423 sprintf(pg_result, "OK: srcmac"); 1424 return count; 1425 } 1426 1427 if (!strcmp(name, "clear_counters")) { 1428 pktgen_clear_counters(pkt_dev); 1429 sprintf(pg_result, "OK: Clearing counters.\n"); 1430 return count; 1431 } 1432 1433 if (!strcmp(name, "flows")) { 1434 len = num_arg(&user_buffer[i], 10, &value); 1435 if (len < 0) { 1436 return len; 1437 } 1438 i += len; 1439 if (value > MAX_CFLOWS) 1440 value = MAX_CFLOWS; 1441 1442 pkt_dev->cflows = value; 1443 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1444 return count; 1445 } 1446 1447 if (!strcmp(name, "flowlen")) { 1448 len = num_arg(&user_buffer[i], 10, &value); 1449 if (len < 0) { 1450 return len; 1451 } 1452 i += len; 1453 pkt_dev->lflow = value; 1454 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1455 return count; 1456 } 1457 1458 if (!strcmp(name, "queue_map_min")) { 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_min = value; 1465 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1466 return count; 1467 } 1468 1469 if (!strcmp(name, "queue_map_max")) { 1470 len = num_arg(&user_buffer[i], 5, &value); 1471 if (len < 0) { 1472 return len; 1473 } 1474 i += len; 1475 pkt_dev->queue_map_max = value; 1476 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1477 return count; 1478 } 1479 1480 if (!strcmp(name, "mpls")) { 1481 unsigned n, cnt; 1482 1483 len = get_labels(&user_buffer[i], pkt_dev); 1484 if (len < 0) 1485 return len; 1486 i += len; 1487 cnt = sprintf(pg_result, "OK: mpls="); 1488 for (n = 0; n < pkt_dev->nr_labels; n++) 1489 cnt += sprintf(pg_result + cnt, 1490 "%08x%s", ntohl(pkt_dev->labels[n]), 1491 n == pkt_dev->nr_labels-1 ? "" : ","); 1492 1493 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1494 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1495 pkt_dev->svlan_id = 0xffff; 1496 1497 if (debug) 1498 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n"); 1499 } 1500 return count; 1501 } 1502 1503 if (!strcmp(name, "vlan_id")) { 1504 len = num_arg(&user_buffer[i], 4, &value); 1505 if (len < 0) { 1506 return len; 1507 } 1508 i += len; 1509 if (value <= 4095) { 1510 pkt_dev->vlan_id = value; /* turn on VLAN */ 1511 1512 if (debug) 1513 printk(KERN_DEBUG "pktgen: VLAN turned on\n"); 1514 1515 if (debug && pkt_dev->nr_labels) 1516 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1517 1518 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1519 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1520 } else { 1521 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1522 pkt_dev->svlan_id = 0xffff; 1523 1524 if (debug) 1525 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1526 } 1527 return count; 1528 } 1529 1530 if (!strcmp(name, "vlan_p")) { 1531 len = num_arg(&user_buffer[i], 1, &value); 1532 if (len < 0) { 1533 return len; 1534 } 1535 i += len; 1536 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1537 pkt_dev->vlan_p = value; 1538 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1539 } else { 1540 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1541 } 1542 return count; 1543 } 1544 1545 if (!strcmp(name, "vlan_cfi")) { 1546 len = num_arg(&user_buffer[i], 1, &value); 1547 if (len < 0) { 1548 return len; 1549 } 1550 i += len; 1551 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1552 pkt_dev->vlan_cfi = value; 1553 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1554 } else { 1555 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1556 } 1557 return count; 1558 } 1559 1560 if (!strcmp(name, "svlan_id")) { 1561 len = num_arg(&user_buffer[i], 4, &value); 1562 if (len < 0) { 1563 return len; 1564 } 1565 i += len; 1566 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1567 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1568 1569 if (debug) 1570 printk(KERN_DEBUG "pktgen: SVLAN turned on\n"); 1571 1572 if (debug && pkt_dev->nr_labels) 1573 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1574 1575 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1576 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1577 } else { 1578 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1579 pkt_dev->svlan_id = 0xffff; 1580 1581 if (debug) 1582 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1583 } 1584 return count; 1585 } 1586 1587 if (!strcmp(name, "svlan_p")) { 1588 len = num_arg(&user_buffer[i], 1, &value); 1589 if (len < 0) { 1590 return len; 1591 } 1592 i += len; 1593 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1594 pkt_dev->svlan_p = value; 1595 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1596 } else { 1597 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1598 } 1599 return count; 1600 } 1601 1602 if (!strcmp(name, "svlan_cfi")) { 1603 len = num_arg(&user_buffer[i], 1, &value); 1604 if (len < 0) { 1605 return len; 1606 } 1607 i += len; 1608 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1609 pkt_dev->svlan_cfi = value; 1610 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1611 } else { 1612 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1613 } 1614 return count; 1615 } 1616 1617 if (!strcmp(name, "tos")) { 1618 __u32 tmp_value = 0; 1619 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1620 if (len < 0) { 1621 return len; 1622 } 1623 i += len; 1624 if (len == 2) { 1625 pkt_dev->tos = tmp_value; 1626 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1627 } else { 1628 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1629 } 1630 return count; 1631 } 1632 1633 if (!strcmp(name, "traffic_class")) { 1634 __u32 tmp_value = 0; 1635 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1636 if (len < 0) { 1637 return len; 1638 } 1639 i += len; 1640 if (len == 2) { 1641 pkt_dev->traffic_class = tmp_value; 1642 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1643 } else { 1644 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1645 } 1646 return count; 1647 } 1648 1649 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1650 return -EINVAL; 1651 } 1652 1653 static int pktgen_if_open(struct inode *inode, struct file *file) 1654 { 1655 return single_open(file, pktgen_if_show, PDE(inode)->data); 1656 } 1657 1658 static const struct file_operations pktgen_if_fops = { 1659 .owner = THIS_MODULE, 1660 .open = pktgen_if_open, 1661 .read = seq_read, 1662 .llseek = seq_lseek, 1663 .write = pktgen_if_write, 1664 .release = single_release, 1665 }; 1666 1667 static int pktgen_thread_show(struct seq_file *seq, void *v) 1668 { 1669 struct pktgen_thread *t = seq->private; 1670 struct pktgen_dev *pkt_dev; 1671 1672 BUG_ON(!t); 1673 1674 seq_printf(seq, "Running: "); 1675 1676 if_lock(t); 1677 list_for_each_entry(pkt_dev, &t->if_list, list) 1678 if (pkt_dev->running) 1679 seq_printf(seq, "%s ", pkt_dev->odev->name); 1680 1681 seq_printf(seq, "\nStopped: "); 1682 1683 list_for_each_entry(pkt_dev, &t->if_list, list) 1684 if (!pkt_dev->running) 1685 seq_printf(seq, "%s ", pkt_dev->odev->name); 1686 1687 if (t->result[0]) 1688 seq_printf(seq, "\nResult: %s\n", t->result); 1689 else 1690 seq_printf(seq, "\nResult: NA\n"); 1691 1692 if_unlock(t); 1693 1694 return 0; 1695 } 1696 1697 static ssize_t pktgen_thread_write(struct file *file, 1698 const char __user * user_buffer, 1699 size_t count, loff_t * offset) 1700 { 1701 struct seq_file *seq = (struct seq_file *)file->private_data; 1702 struct pktgen_thread *t = seq->private; 1703 int i = 0, max, len, ret; 1704 char name[40]; 1705 char *pg_result; 1706 1707 if (count < 1) { 1708 // sprintf(pg_result, "Wrong command format"); 1709 return -EINVAL; 1710 } 1711 1712 max = count - i; 1713 len = count_trail_chars(&user_buffer[i], max); 1714 if (len < 0) 1715 return len; 1716 1717 i += len; 1718 1719 /* Read variable name */ 1720 1721 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1722 if (len < 0) 1723 return len; 1724 1725 memset(name, 0, sizeof(name)); 1726 if (copy_from_user(name, &user_buffer[i], len)) 1727 return -EFAULT; 1728 i += len; 1729 1730 max = count - i; 1731 len = count_trail_chars(&user_buffer[i], max); 1732 if (len < 0) 1733 return len; 1734 1735 i += len; 1736 1737 if (debug) 1738 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n", 1739 name, (unsigned long)count); 1740 1741 if (!t) { 1742 printk(KERN_ERR "pktgen: ERROR: No thread\n"); 1743 ret = -EINVAL; 1744 goto out; 1745 } 1746 1747 pg_result = &(t->result[0]); 1748 1749 if (!strcmp(name, "add_device")) { 1750 char f[32]; 1751 memset(f, 0, 32); 1752 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1753 if (len < 0) { 1754 ret = len; 1755 goto out; 1756 } 1757 if (copy_from_user(f, &user_buffer[i], len)) 1758 return -EFAULT; 1759 i += len; 1760 mutex_lock(&pktgen_thread_lock); 1761 pktgen_add_device(t, f); 1762 mutex_unlock(&pktgen_thread_lock); 1763 ret = count; 1764 sprintf(pg_result, "OK: add_device=%s", f); 1765 goto out; 1766 } 1767 1768 if (!strcmp(name, "rem_device_all")) { 1769 mutex_lock(&pktgen_thread_lock); 1770 t->control |= T_REMDEVALL; 1771 mutex_unlock(&pktgen_thread_lock); 1772 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1773 ret = count; 1774 sprintf(pg_result, "OK: rem_device_all"); 1775 goto out; 1776 } 1777 1778 if (!strcmp(name, "max_before_softirq")) { 1779 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1780 ret = count; 1781 goto out; 1782 } 1783 1784 ret = -EINVAL; 1785 out: 1786 return ret; 1787 } 1788 1789 static int pktgen_thread_open(struct inode *inode, struct file *file) 1790 { 1791 return single_open(file, pktgen_thread_show, PDE(inode)->data); 1792 } 1793 1794 static const struct file_operations pktgen_thread_fops = { 1795 .owner = THIS_MODULE, 1796 .open = pktgen_thread_open, 1797 .read = seq_read, 1798 .llseek = seq_lseek, 1799 .write = pktgen_thread_write, 1800 .release = single_release, 1801 }; 1802 1803 /* Think find or remove for NN */ 1804 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove) 1805 { 1806 struct pktgen_thread *t; 1807 struct pktgen_dev *pkt_dev = NULL; 1808 1809 list_for_each_entry(t, &pktgen_threads, th_list) { 1810 pkt_dev = pktgen_find_dev(t, ifname); 1811 if (pkt_dev) { 1812 if (remove) { 1813 if_lock(t); 1814 pkt_dev->removal_mark = 1; 1815 t->control |= T_REMDEV; 1816 if_unlock(t); 1817 } 1818 break; 1819 } 1820 } 1821 return pkt_dev; 1822 } 1823 1824 /* 1825 * mark a device for removal 1826 */ 1827 static void pktgen_mark_device(const char *ifname) 1828 { 1829 struct pktgen_dev *pkt_dev = NULL; 1830 const int max_tries = 10, msec_per_try = 125; 1831 int i = 0; 1832 1833 mutex_lock(&pktgen_thread_lock); 1834 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname); 1835 1836 while (1) { 1837 1838 pkt_dev = __pktgen_NN_threads(ifname, REMOVE); 1839 if (pkt_dev == NULL) 1840 break; /* success */ 1841 1842 mutex_unlock(&pktgen_thread_lock); 1843 pr_debug("pktgen: pktgen_mark_device waiting for %s " 1844 "to disappear....\n", ifname); 1845 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1846 mutex_lock(&pktgen_thread_lock); 1847 1848 if (++i >= max_tries) { 1849 printk(KERN_ERR "pktgen_mark_device: timed out after " 1850 "waiting %d msec for device %s to be removed\n", 1851 msec_per_try * i, ifname); 1852 break; 1853 } 1854 1855 } 1856 1857 mutex_unlock(&pktgen_thread_lock); 1858 } 1859 1860 static void pktgen_change_name(struct net_device *dev) 1861 { 1862 struct pktgen_thread *t; 1863 1864 list_for_each_entry(t, &pktgen_threads, th_list) { 1865 struct pktgen_dev *pkt_dev; 1866 1867 list_for_each_entry(pkt_dev, &t->if_list, list) { 1868 if (pkt_dev->odev != dev) 1869 continue; 1870 1871 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 1872 1873 pkt_dev->entry = create_proc_entry(dev->name, 0600, 1874 pg_proc_dir); 1875 if (!pkt_dev->entry) 1876 printk(KERN_ERR "pktgen: can't move proc " 1877 " entry for '%s'\n", dev->name); 1878 break; 1879 } 1880 } 1881 } 1882 1883 static int pktgen_device_event(struct notifier_block *unused, 1884 unsigned long event, void *ptr) 1885 { 1886 struct net_device *dev = ptr; 1887 1888 if (!net_eq(dev_net(dev), &init_net)) 1889 return NOTIFY_DONE; 1890 1891 /* It is OK that we do not hold the group lock right now, 1892 * as we run under the RTNL lock. 1893 */ 1894 1895 switch (event) { 1896 case NETDEV_CHANGENAME: 1897 pktgen_change_name(dev); 1898 break; 1899 1900 case NETDEV_UNREGISTER: 1901 pktgen_mark_device(dev->name); 1902 break; 1903 } 1904 1905 return NOTIFY_DONE; 1906 } 1907 1908 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev, const char *ifname) 1909 { 1910 char b[IFNAMSIZ+5]; 1911 int i = 0; 1912 1913 for(i=0; ifname[i] != '@'; i++) { 1914 if(i == IFNAMSIZ) 1915 break; 1916 1917 b[i] = ifname[i]; 1918 } 1919 b[i] = 0; 1920 1921 return dev_get_by_name(&init_net, b); 1922 } 1923 1924 1925 /* Associate pktgen_dev with a device. */ 1926 1927 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname) 1928 { 1929 struct net_device *odev; 1930 int err; 1931 1932 /* Clean old setups */ 1933 if (pkt_dev->odev) { 1934 dev_put(pkt_dev->odev); 1935 pkt_dev->odev = NULL; 1936 } 1937 1938 odev = pktgen_dev_get_by_name(pkt_dev, ifname); 1939 if (!odev) { 1940 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname); 1941 return -ENODEV; 1942 } 1943 1944 if (odev->type != ARPHRD_ETHER) { 1945 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname); 1946 err = -EINVAL; 1947 } else if (!netif_running(odev)) { 1948 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname); 1949 err = -ENETDOWN; 1950 } else { 1951 pkt_dev->odev = odev; 1952 return 0; 1953 } 1954 1955 dev_put(odev); 1956 return err; 1957 } 1958 1959 /* Read pkt_dev from the interface and set up internal pktgen_dev 1960 * structure to have the right information to create/send packets 1961 */ 1962 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 1963 { 1964 int ntxq; 1965 1966 if (!pkt_dev->odev) { 1967 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in " 1968 "setup_inject.\n"); 1969 sprintf(pkt_dev->result, 1970 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 1971 return; 1972 } 1973 1974 /* make sure that we don't pick a non-existing transmit queue */ 1975 ntxq = pkt_dev->odev->real_num_tx_queues; 1976 if (ntxq <= num_online_cpus() && (pkt_dev->flags & F_QUEUE_MAP_CPU)) { 1977 printk(KERN_WARNING "pktgen: WARNING: QUEUE_MAP_CPU " 1978 "disabled because CPU count (%d) exceeds number ", 1979 num_online_cpus()); 1980 printk(KERN_WARNING "pktgen: WARNING: of tx queues " 1981 "(%d) on %s \n", ntxq, pkt_dev->odev->name); 1982 pkt_dev->flags &= ~F_QUEUE_MAP_CPU; 1983 } 1984 if (ntxq <= pkt_dev->queue_map_min) { 1985 printk(KERN_WARNING "pktgen: WARNING: Requested " 1986 "queue_map_min (%d) exceeds number of tx\n", 1987 pkt_dev->queue_map_min); 1988 printk(KERN_WARNING "pktgen: WARNING: queues (%d) on " 1989 "%s, resetting\n", ntxq, pkt_dev->odev->name); 1990 pkt_dev->queue_map_min = ntxq - 1; 1991 } 1992 if (ntxq <= pkt_dev->queue_map_max) { 1993 printk(KERN_WARNING "pktgen: WARNING: Requested " 1994 "queue_map_max (%d) exceeds number of tx\n", 1995 pkt_dev->queue_map_max); 1996 printk(KERN_WARNING "pktgen: WARNING: queues (%d) on " 1997 "%s, resetting\n", ntxq, pkt_dev->odev->name); 1998 pkt_dev->queue_map_max = ntxq - 1; 1999 } 2000 2001 /* Default to the interface's mac if not explicitly set. */ 2002 2003 if (is_zero_ether_addr(pkt_dev->src_mac)) 2004 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN); 2005 2006 /* Set up Dest MAC */ 2007 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 2008 2009 /* Set up pkt size */ 2010 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2011 2012 if (pkt_dev->flags & F_IPV6) { 2013 /* 2014 * Skip this automatic address setting until locks or functions 2015 * gets exported 2016 */ 2017 2018 #ifdef NOTNOW 2019 int i, set = 0, err = 1; 2020 struct inet6_dev *idev; 2021 2022 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2023 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2024 set = 1; 2025 break; 2026 } 2027 2028 if (!set) { 2029 2030 /* 2031 * Use linklevel address if unconfigured. 2032 * 2033 * use ipv6_get_lladdr if/when it's get exported 2034 */ 2035 2036 rcu_read_lock(); 2037 if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) { 2038 struct inet6_ifaddr *ifp; 2039 2040 read_lock_bh(&idev->lock); 2041 for (ifp = idev->addr_list; ifp; 2042 ifp = ifp->if_next) { 2043 if (ifp->scope == IFA_LINK 2044 && !(ifp-> 2045 flags & IFA_F_TENTATIVE)) { 2046 ipv6_addr_copy(&pkt_dev-> 2047 cur_in6_saddr, 2048 &ifp->addr); 2049 err = 0; 2050 break; 2051 } 2052 } 2053 read_unlock_bh(&idev->lock); 2054 } 2055 rcu_read_unlock(); 2056 if (err) 2057 printk(KERN_ERR "pktgen: ERROR: IPv6 link " 2058 "address not availble.\n"); 2059 } 2060 #endif 2061 } else { 2062 pkt_dev->saddr_min = 0; 2063 pkt_dev->saddr_max = 0; 2064 if (strlen(pkt_dev->src_min) == 0) { 2065 2066 struct in_device *in_dev; 2067 2068 rcu_read_lock(); 2069 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2070 if (in_dev) { 2071 if (in_dev->ifa_list) { 2072 pkt_dev->saddr_min = 2073 in_dev->ifa_list->ifa_address; 2074 pkt_dev->saddr_max = pkt_dev->saddr_min; 2075 } 2076 } 2077 rcu_read_unlock(); 2078 } else { 2079 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2080 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2081 } 2082 2083 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2084 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2085 } 2086 /* Initialize current values. */ 2087 pkt_dev->cur_dst_mac_offset = 0; 2088 pkt_dev->cur_src_mac_offset = 0; 2089 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2090 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2091 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2092 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2093 pkt_dev->nflows = 0; 2094 } 2095 2096 static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us) 2097 { 2098 __u64 start; 2099 __u64 now; 2100 2101 start = now = getCurUs(); 2102 while (now < spin_until_us) { 2103 /* TODO: optimize sleeping behavior */ 2104 if (spin_until_us - now > jiffies_to_usecs(1) + 1) 2105 schedule_timeout_interruptible(1); 2106 else if (spin_until_us - now > 100) { 2107 if (!pkt_dev->running) 2108 return; 2109 if (need_resched()) 2110 schedule(); 2111 } 2112 2113 now = getCurUs(); 2114 } 2115 2116 pkt_dev->idle_acc += now - start; 2117 } 2118 2119 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2120 { 2121 pkt_dev->pkt_overhead = 0; 2122 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2123 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2124 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2125 } 2126 2127 static inline int f_seen(struct pktgen_dev *pkt_dev, int flow) 2128 { 2129 2130 if (pkt_dev->flows[flow].flags & F_INIT) 2131 return 1; 2132 else 2133 return 0; 2134 } 2135 2136 static inline int f_pick(struct pktgen_dev *pkt_dev) 2137 { 2138 int flow = pkt_dev->curfl; 2139 2140 if (pkt_dev->flags & F_FLOW_SEQ) { 2141 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2142 /* reset time */ 2143 pkt_dev->flows[flow].count = 0; 2144 pkt_dev->flows[flow].flags = 0; 2145 pkt_dev->curfl += 1; 2146 if (pkt_dev->curfl >= pkt_dev->cflows) 2147 pkt_dev->curfl = 0; /*reset */ 2148 } 2149 } else { 2150 flow = random32() % pkt_dev->cflows; 2151 pkt_dev->curfl = flow; 2152 2153 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2154 pkt_dev->flows[flow].count = 0; 2155 pkt_dev->flows[flow].flags = 0; 2156 } 2157 } 2158 2159 return pkt_dev->curfl; 2160 } 2161 2162 2163 #ifdef CONFIG_XFRM 2164 /* If there was already an IPSEC SA, we keep it as is, else 2165 * we go look for it ... 2166 */ 2167 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2168 { 2169 struct xfrm_state *x = pkt_dev->flows[flow].x; 2170 if (!x) { 2171 /*slow path: we dont already have xfrm_state*/ 2172 x = xfrm_stateonly_find((xfrm_address_t *)&pkt_dev->cur_daddr, 2173 (xfrm_address_t *)&pkt_dev->cur_saddr, 2174 AF_INET, 2175 pkt_dev->ipsmode, 2176 pkt_dev->ipsproto, 0); 2177 if (x) { 2178 pkt_dev->flows[flow].x = x; 2179 set_pkt_overhead(pkt_dev); 2180 pkt_dev->pkt_overhead+=x->props.header_len; 2181 } 2182 2183 } 2184 } 2185 #endif 2186 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2187 { 2188 2189 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2190 pkt_dev->cur_queue_map = smp_processor_id(); 2191 2192 else if (pkt_dev->queue_map_min < pkt_dev->queue_map_max) { 2193 __u16 t; 2194 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2195 t = random32() % 2196 (pkt_dev->queue_map_max - 2197 pkt_dev->queue_map_min + 1) 2198 + pkt_dev->queue_map_min; 2199 } else { 2200 t = pkt_dev->cur_queue_map + 1; 2201 if (t > pkt_dev->queue_map_max) 2202 t = pkt_dev->queue_map_min; 2203 } 2204 pkt_dev->cur_queue_map = t; 2205 } 2206 } 2207 2208 /* Increment/randomize headers according to flags and current values 2209 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2210 */ 2211 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2212 { 2213 __u32 imn; 2214 __u32 imx; 2215 int flow = 0; 2216 2217 if (pkt_dev->cflows) 2218 flow = f_pick(pkt_dev); 2219 2220 /* Deal with source MAC */ 2221 if (pkt_dev->src_mac_count > 1) { 2222 __u32 mc; 2223 __u32 tmp; 2224 2225 if (pkt_dev->flags & F_MACSRC_RND) 2226 mc = random32() % pkt_dev->src_mac_count; 2227 else { 2228 mc = pkt_dev->cur_src_mac_offset++; 2229 if (pkt_dev->cur_src_mac_offset >= 2230 pkt_dev->src_mac_count) 2231 pkt_dev->cur_src_mac_offset = 0; 2232 } 2233 2234 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2235 pkt_dev->hh[11] = tmp; 2236 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2237 pkt_dev->hh[10] = tmp; 2238 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2239 pkt_dev->hh[9] = tmp; 2240 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2241 pkt_dev->hh[8] = tmp; 2242 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2243 pkt_dev->hh[7] = tmp; 2244 } 2245 2246 /* Deal with Destination MAC */ 2247 if (pkt_dev->dst_mac_count > 1) { 2248 __u32 mc; 2249 __u32 tmp; 2250 2251 if (pkt_dev->flags & F_MACDST_RND) 2252 mc = random32() % pkt_dev->dst_mac_count; 2253 2254 else { 2255 mc = pkt_dev->cur_dst_mac_offset++; 2256 if (pkt_dev->cur_dst_mac_offset >= 2257 pkt_dev->dst_mac_count) { 2258 pkt_dev->cur_dst_mac_offset = 0; 2259 } 2260 } 2261 2262 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2263 pkt_dev->hh[5] = tmp; 2264 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2265 pkt_dev->hh[4] = tmp; 2266 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2267 pkt_dev->hh[3] = tmp; 2268 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2269 pkt_dev->hh[2] = tmp; 2270 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2271 pkt_dev->hh[1] = tmp; 2272 } 2273 2274 if (pkt_dev->flags & F_MPLS_RND) { 2275 unsigned i; 2276 for (i = 0; i < pkt_dev->nr_labels; i++) 2277 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2278 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2279 ((__force __be32)random32() & 2280 htonl(0x000fffff)); 2281 } 2282 2283 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2284 pkt_dev->vlan_id = random32() & (4096-1); 2285 } 2286 2287 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2288 pkt_dev->svlan_id = random32() & (4096 - 1); 2289 } 2290 2291 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2292 if (pkt_dev->flags & F_UDPSRC_RND) 2293 pkt_dev->cur_udp_src = random32() % 2294 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2295 + pkt_dev->udp_src_min; 2296 2297 else { 2298 pkt_dev->cur_udp_src++; 2299 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2300 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2301 } 2302 } 2303 2304 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2305 if (pkt_dev->flags & F_UDPDST_RND) { 2306 pkt_dev->cur_udp_dst = random32() % 2307 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2308 + pkt_dev->udp_dst_min; 2309 } else { 2310 pkt_dev->cur_udp_dst++; 2311 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2312 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2313 } 2314 } 2315 2316 if (!(pkt_dev->flags & F_IPV6)) { 2317 2318 if ((imn = ntohl(pkt_dev->saddr_min)) < (imx = 2319 ntohl(pkt_dev-> 2320 saddr_max))) { 2321 __u32 t; 2322 if (pkt_dev->flags & F_IPSRC_RND) 2323 t = random32() % (imx - imn) + imn; 2324 else { 2325 t = ntohl(pkt_dev->cur_saddr); 2326 t++; 2327 if (t > imx) { 2328 t = imn; 2329 } 2330 } 2331 pkt_dev->cur_saddr = htonl(t); 2332 } 2333 2334 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2335 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2336 } else { 2337 imn = ntohl(pkt_dev->daddr_min); 2338 imx = ntohl(pkt_dev->daddr_max); 2339 if (imn < imx) { 2340 __u32 t; 2341 __be32 s; 2342 if (pkt_dev->flags & F_IPDST_RND) { 2343 2344 t = random32() % (imx - imn) + imn; 2345 s = htonl(t); 2346 2347 while (ipv4_is_loopback(s) || 2348 ipv4_is_multicast(s) || 2349 ipv4_is_lbcast(s) || 2350 ipv4_is_zeronet(s) || 2351 ipv4_is_local_multicast(s)) { 2352 t = random32() % (imx - imn) + imn; 2353 s = htonl(t); 2354 } 2355 pkt_dev->cur_daddr = s; 2356 } else { 2357 t = ntohl(pkt_dev->cur_daddr); 2358 t++; 2359 if (t > imx) { 2360 t = imn; 2361 } 2362 pkt_dev->cur_daddr = htonl(t); 2363 } 2364 } 2365 if (pkt_dev->cflows) { 2366 pkt_dev->flows[flow].flags |= F_INIT; 2367 pkt_dev->flows[flow].cur_daddr = 2368 pkt_dev->cur_daddr; 2369 #ifdef CONFIG_XFRM 2370 if (pkt_dev->flags & F_IPSEC_ON) 2371 get_ipsec_sa(pkt_dev, flow); 2372 #endif 2373 pkt_dev->nflows++; 2374 } 2375 } 2376 } else { /* IPV6 * */ 2377 2378 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 && 2379 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 && 2380 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 && 2381 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ; 2382 else { 2383 int i; 2384 2385 /* Only random destinations yet */ 2386 2387 for (i = 0; i < 4; i++) { 2388 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2389 (((__force __be32)random32() | 2390 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2391 pkt_dev->max_in6_daddr.s6_addr32[i]); 2392 } 2393 } 2394 } 2395 2396 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2397 __u32 t; 2398 if (pkt_dev->flags & F_TXSIZE_RND) { 2399 t = random32() % 2400 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2401 + pkt_dev->min_pkt_size; 2402 } else { 2403 t = pkt_dev->cur_pkt_size + 1; 2404 if (t > pkt_dev->max_pkt_size) 2405 t = pkt_dev->min_pkt_size; 2406 } 2407 pkt_dev->cur_pkt_size = t; 2408 } 2409 2410 set_cur_queue_map(pkt_dev); 2411 2412 pkt_dev->flows[flow].count++; 2413 } 2414 2415 2416 #ifdef CONFIG_XFRM 2417 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2418 { 2419 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2420 int err = 0; 2421 struct iphdr *iph; 2422 2423 if (!x) 2424 return 0; 2425 /* XXX: we dont support tunnel mode for now until 2426 * we resolve the dst issue */ 2427 if (x->props.mode != XFRM_MODE_TRANSPORT) 2428 return 0; 2429 2430 spin_lock(&x->lock); 2431 iph = ip_hdr(skb); 2432 2433 err = x->outer_mode->output(x, skb); 2434 if (err) 2435 goto error; 2436 err = x->type->output(x, skb); 2437 if (err) 2438 goto error; 2439 2440 x->curlft.bytes +=skb->len; 2441 x->curlft.packets++; 2442 error: 2443 spin_unlock(&x->lock); 2444 return err; 2445 } 2446 2447 static inline void free_SAs(struct pktgen_dev *pkt_dev) 2448 { 2449 if (pkt_dev->cflows) { 2450 /* let go of the SAs if we have them */ 2451 int i = 0; 2452 for (; i < pkt_dev->nflows; i++){ 2453 struct xfrm_state *x = pkt_dev->flows[i].x; 2454 if (x) { 2455 xfrm_state_put(x); 2456 pkt_dev->flows[i].x = NULL; 2457 } 2458 } 2459 } 2460 } 2461 2462 static inline int process_ipsec(struct pktgen_dev *pkt_dev, 2463 struct sk_buff *skb, __be16 protocol) 2464 { 2465 if (pkt_dev->flags & F_IPSEC_ON) { 2466 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2467 int nhead = 0; 2468 if (x) { 2469 int ret; 2470 __u8 *eth; 2471 nhead = x->props.header_len - skb_headroom(skb); 2472 if (nhead >0) { 2473 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2474 if (ret < 0) { 2475 printk(KERN_ERR "Error expanding " 2476 "ipsec packet %d\n",ret); 2477 goto err; 2478 } 2479 } 2480 2481 /* ipsec is not expecting ll header */ 2482 skb_pull(skb, ETH_HLEN); 2483 ret = pktgen_output_ipsec(skb, pkt_dev); 2484 if (ret) { 2485 printk(KERN_ERR "Error creating ipsec " 2486 "packet %d\n",ret); 2487 goto err; 2488 } 2489 /* restore ll */ 2490 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2491 memcpy(eth, pkt_dev->hh, 12); 2492 *(u16 *) & eth[12] = protocol; 2493 } 2494 } 2495 return 1; 2496 err: 2497 kfree_skb(skb); 2498 return 0; 2499 } 2500 #endif 2501 2502 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2503 { 2504 unsigned i; 2505 for (i = 0; i < pkt_dev->nr_labels; i++) { 2506 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2507 } 2508 mpls--; 2509 *mpls |= MPLS_STACK_BOTTOM; 2510 } 2511 2512 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2513 unsigned int prio) 2514 { 2515 return htons(id | (cfi << 12) | (prio << 13)); 2516 } 2517 2518 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2519 struct pktgen_dev *pkt_dev) 2520 { 2521 struct sk_buff *skb = NULL; 2522 __u8 *eth; 2523 struct udphdr *udph; 2524 int datalen, iplen; 2525 struct iphdr *iph; 2526 struct pktgen_hdr *pgh = NULL; 2527 __be16 protocol = htons(ETH_P_IP); 2528 __be32 *mpls; 2529 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2530 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2531 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2532 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2533 u16 queue_map; 2534 2535 if (pkt_dev->nr_labels) 2536 protocol = htons(ETH_P_MPLS_UC); 2537 2538 if (pkt_dev->vlan_id != 0xffff) 2539 protocol = htons(ETH_P_8021Q); 2540 2541 /* Update any of the values, used when we're incrementing various 2542 * fields. 2543 */ 2544 queue_map = pkt_dev->cur_queue_map; 2545 mod_cur_headers(pkt_dev); 2546 2547 datalen = (odev->hard_header_len + 16) & ~0xf; 2548 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + datalen + 2549 pkt_dev->pkt_overhead, GFP_ATOMIC); 2550 if (!skb) { 2551 sprintf(pkt_dev->result, "No memory"); 2552 return NULL; 2553 } 2554 2555 skb_reserve(skb, datalen); 2556 2557 /* Reserve for ethernet and IP header */ 2558 eth = (__u8 *) skb_push(skb, 14); 2559 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2560 if (pkt_dev->nr_labels) 2561 mpls_push(mpls, pkt_dev); 2562 2563 if (pkt_dev->vlan_id != 0xffff) { 2564 if (pkt_dev->svlan_id != 0xffff) { 2565 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2566 *svlan_tci = build_tci(pkt_dev->svlan_id, 2567 pkt_dev->svlan_cfi, 2568 pkt_dev->svlan_p); 2569 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2570 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2571 } 2572 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2573 *vlan_tci = build_tci(pkt_dev->vlan_id, 2574 pkt_dev->vlan_cfi, 2575 pkt_dev->vlan_p); 2576 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2577 *vlan_encapsulated_proto = htons(ETH_P_IP); 2578 } 2579 2580 skb->network_header = skb->tail; 2581 skb->transport_header = skb->network_header + sizeof(struct iphdr); 2582 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr)); 2583 skb_set_queue_mapping(skb, queue_map); 2584 iph = ip_hdr(skb); 2585 udph = udp_hdr(skb); 2586 2587 memcpy(eth, pkt_dev->hh, 12); 2588 *(__be16 *) & eth[12] = protocol; 2589 2590 /* Eth + IPh + UDPh + mpls */ 2591 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2592 pkt_dev->pkt_overhead; 2593 if (datalen < sizeof(struct pktgen_hdr)) 2594 datalen = sizeof(struct pktgen_hdr); 2595 2596 udph->source = htons(pkt_dev->cur_udp_src); 2597 udph->dest = htons(pkt_dev->cur_udp_dst); 2598 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2599 udph->check = 0; /* No checksum */ 2600 2601 iph->ihl = 5; 2602 iph->version = 4; 2603 iph->ttl = 32; 2604 iph->tos = pkt_dev->tos; 2605 iph->protocol = IPPROTO_UDP; /* UDP */ 2606 iph->saddr = pkt_dev->cur_saddr; 2607 iph->daddr = pkt_dev->cur_daddr; 2608 iph->frag_off = 0; 2609 iplen = 20 + 8 + datalen; 2610 iph->tot_len = htons(iplen); 2611 iph->check = 0; 2612 iph->check = ip_fast_csum((void *)iph, iph->ihl); 2613 skb->protocol = protocol; 2614 skb->mac_header = (skb->network_header - ETH_HLEN - 2615 pkt_dev->pkt_overhead); 2616 skb->dev = odev; 2617 skb->pkt_type = PACKET_HOST; 2618 2619 if (pkt_dev->nfrags <= 0) 2620 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 2621 else { 2622 int frags = pkt_dev->nfrags; 2623 int i; 2624 2625 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 2626 2627 if (frags > MAX_SKB_FRAGS) 2628 frags = MAX_SKB_FRAGS; 2629 if (datalen > frags * PAGE_SIZE) { 2630 skb_put(skb, datalen - frags * PAGE_SIZE); 2631 datalen = frags * PAGE_SIZE; 2632 } 2633 2634 i = 0; 2635 while (datalen > 0) { 2636 struct page *page = alloc_pages(GFP_KERNEL, 0); 2637 skb_shinfo(skb)->frags[i].page = page; 2638 skb_shinfo(skb)->frags[i].page_offset = 0; 2639 skb_shinfo(skb)->frags[i].size = 2640 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 2641 datalen -= skb_shinfo(skb)->frags[i].size; 2642 skb->len += skb_shinfo(skb)->frags[i].size; 2643 skb->data_len += skb_shinfo(skb)->frags[i].size; 2644 i++; 2645 skb_shinfo(skb)->nr_frags = i; 2646 } 2647 2648 while (i < frags) { 2649 int rem; 2650 2651 if (i == 0) 2652 break; 2653 2654 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 2655 if (rem == 0) 2656 break; 2657 2658 skb_shinfo(skb)->frags[i - 1].size -= rem; 2659 2660 skb_shinfo(skb)->frags[i] = 2661 skb_shinfo(skb)->frags[i - 1]; 2662 get_page(skb_shinfo(skb)->frags[i].page); 2663 skb_shinfo(skb)->frags[i].page = 2664 skb_shinfo(skb)->frags[i - 1].page; 2665 skb_shinfo(skb)->frags[i].page_offset += 2666 skb_shinfo(skb)->frags[i - 1].size; 2667 skb_shinfo(skb)->frags[i].size = rem; 2668 i++; 2669 skb_shinfo(skb)->nr_frags = i; 2670 } 2671 } 2672 2673 /* Stamp the time, and sequence number, convert them to network byte order */ 2674 2675 if (pgh) { 2676 struct timeval timestamp; 2677 2678 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2679 pgh->seq_num = htonl(pkt_dev->seq_num); 2680 2681 do_gettimeofday(×tamp); 2682 pgh->tv_sec = htonl(timestamp.tv_sec); 2683 pgh->tv_usec = htonl(timestamp.tv_usec); 2684 } 2685 2686 #ifdef CONFIG_XFRM 2687 if (!process_ipsec(pkt_dev, skb, protocol)) 2688 return NULL; 2689 #endif 2690 2691 return skb; 2692 } 2693 2694 /* 2695 * scan_ip6, fmt_ip taken from dietlibc-0.21 2696 * Author Felix von Leitner <felix-dietlibc@fefe.de> 2697 * 2698 * Slightly modified for kernel. 2699 * Should be candidate for net/ipv4/utils.c 2700 * --ro 2701 */ 2702 2703 static unsigned int scan_ip6(const char *s, char ip[16]) 2704 { 2705 unsigned int i; 2706 unsigned int len = 0; 2707 unsigned long u; 2708 char suffix[16]; 2709 unsigned int prefixlen = 0; 2710 unsigned int suffixlen = 0; 2711 __be32 tmp; 2712 char *pos; 2713 2714 for (i = 0; i < 16; i++) 2715 ip[i] = 0; 2716 2717 for (;;) { 2718 if (*s == ':') { 2719 len++; 2720 if (s[1] == ':') { /* Found "::", skip to part 2 */ 2721 s += 2; 2722 len++; 2723 break; 2724 } 2725 s++; 2726 } 2727 2728 u = simple_strtoul(s, &pos, 16); 2729 i = pos - s; 2730 if (!i) 2731 return 0; 2732 if (prefixlen == 12 && s[i] == '.') { 2733 2734 /* the last 4 bytes may be written as IPv4 address */ 2735 2736 tmp = in_aton(s); 2737 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp)); 2738 return i + len; 2739 } 2740 ip[prefixlen++] = (u >> 8); 2741 ip[prefixlen++] = (u & 255); 2742 s += i; 2743 len += i; 2744 if (prefixlen == 16) 2745 return len; 2746 } 2747 2748 /* part 2, after "::" */ 2749 for (;;) { 2750 if (*s == ':') { 2751 if (suffixlen == 0) 2752 break; 2753 s++; 2754 len++; 2755 } else if (suffixlen != 0) 2756 break; 2757 2758 u = simple_strtol(s, &pos, 16); 2759 i = pos - s; 2760 if (!i) { 2761 if (*s) 2762 len--; 2763 break; 2764 } 2765 if (suffixlen + prefixlen <= 12 && s[i] == '.') { 2766 tmp = in_aton(s); 2767 memcpy((struct in_addr *)(suffix + suffixlen), &tmp, 2768 sizeof(tmp)); 2769 suffixlen += 4; 2770 len += strlen(s); 2771 break; 2772 } 2773 suffix[suffixlen++] = (u >> 8); 2774 suffix[suffixlen++] = (u & 255); 2775 s += i; 2776 len += i; 2777 if (prefixlen + suffixlen == 16) 2778 break; 2779 } 2780 for (i = 0; i < suffixlen; i++) 2781 ip[16 - suffixlen + i] = suffix[i]; 2782 return len; 2783 } 2784 2785 static char tohex(char hexdigit) 2786 { 2787 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0'; 2788 } 2789 2790 static int fmt_xlong(char *s, unsigned int i) 2791 { 2792 char *bak = s; 2793 *s = tohex((i >> 12) & 0xf); 2794 if (s != bak || *s != '0') 2795 ++s; 2796 *s = tohex((i >> 8) & 0xf); 2797 if (s != bak || *s != '0') 2798 ++s; 2799 *s = tohex((i >> 4) & 0xf); 2800 if (s != bak || *s != '0') 2801 ++s; 2802 *s = tohex(i & 0xf); 2803 return s - bak + 1; 2804 } 2805 2806 static unsigned int fmt_ip6(char *s, const char ip[16]) 2807 { 2808 unsigned int len; 2809 unsigned int i; 2810 unsigned int temp; 2811 unsigned int compressing; 2812 int j; 2813 2814 len = 0; 2815 compressing = 0; 2816 for (j = 0; j < 16; j += 2) { 2817 2818 #ifdef V4MAPPEDPREFIX 2819 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) { 2820 inet_ntoa_r(*(struct in_addr *)(ip + 12), s); 2821 temp = strlen(s); 2822 return len + temp; 2823 } 2824 #endif 2825 temp = ((unsigned long)(unsigned char)ip[j] << 8) + 2826 (unsigned long)(unsigned char)ip[j + 1]; 2827 if (temp == 0) { 2828 if (!compressing) { 2829 compressing = 1; 2830 if (j == 0) { 2831 *s++ = ':'; 2832 ++len; 2833 } 2834 } 2835 } else { 2836 if (compressing) { 2837 compressing = 0; 2838 *s++ = ':'; 2839 ++len; 2840 } 2841 i = fmt_xlong(s, temp); 2842 len += i; 2843 s += i; 2844 if (j < 14) { 2845 *s++ = ':'; 2846 ++len; 2847 } 2848 } 2849 } 2850 if (compressing) { 2851 *s++ = ':'; 2852 ++len; 2853 } 2854 *s = 0; 2855 return len; 2856 } 2857 2858 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2859 struct pktgen_dev *pkt_dev) 2860 { 2861 struct sk_buff *skb = NULL; 2862 __u8 *eth; 2863 struct udphdr *udph; 2864 int datalen; 2865 struct ipv6hdr *iph; 2866 struct pktgen_hdr *pgh = NULL; 2867 __be16 protocol = htons(ETH_P_IPV6); 2868 __be32 *mpls; 2869 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2870 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2871 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2872 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2873 u16 queue_map; 2874 2875 if (pkt_dev->nr_labels) 2876 protocol = htons(ETH_P_MPLS_UC); 2877 2878 if (pkt_dev->vlan_id != 0xffff) 2879 protocol = htons(ETH_P_8021Q); 2880 2881 /* Update any of the values, used when we're incrementing various 2882 * fields. 2883 */ 2884 queue_map = pkt_dev->cur_queue_map; 2885 mod_cur_headers(pkt_dev); 2886 2887 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16 + 2888 pkt_dev->pkt_overhead, GFP_ATOMIC); 2889 if (!skb) { 2890 sprintf(pkt_dev->result, "No memory"); 2891 return NULL; 2892 } 2893 2894 skb_reserve(skb, 16); 2895 2896 /* Reserve for ethernet and IP header */ 2897 eth = (__u8 *) skb_push(skb, 14); 2898 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2899 if (pkt_dev->nr_labels) 2900 mpls_push(mpls, pkt_dev); 2901 2902 if (pkt_dev->vlan_id != 0xffff) { 2903 if (pkt_dev->svlan_id != 0xffff) { 2904 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2905 *svlan_tci = build_tci(pkt_dev->svlan_id, 2906 pkt_dev->svlan_cfi, 2907 pkt_dev->svlan_p); 2908 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2909 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2910 } 2911 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2912 *vlan_tci = build_tci(pkt_dev->vlan_id, 2913 pkt_dev->vlan_cfi, 2914 pkt_dev->vlan_p); 2915 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2916 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 2917 } 2918 2919 skb->network_header = skb->tail; 2920 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr); 2921 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr)); 2922 skb_set_queue_mapping(skb, queue_map); 2923 iph = ipv6_hdr(skb); 2924 udph = udp_hdr(skb); 2925 2926 memcpy(eth, pkt_dev->hh, 12); 2927 *(__be16 *) & eth[12] = protocol; 2928 2929 /* Eth + IPh + UDPh + mpls */ 2930 datalen = pkt_dev->cur_pkt_size - 14 - 2931 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 2932 pkt_dev->pkt_overhead; 2933 2934 if (datalen < sizeof(struct pktgen_hdr)) { 2935 datalen = sizeof(struct pktgen_hdr); 2936 if (net_ratelimit()) 2937 printk(KERN_INFO "pktgen: increased datalen to %d\n", 2938 datalen); 2939 } 2940 2941 udph->source = htons(pkt_dev->cur_udp_src); 2942 udph->dest = htons(pkt_dev->cur_udp_dst); 2943 udph->len = htons(datalen + sizeof(struct udphdr)); 2944 udph->check = 0; /* No checksum */ 2945 2946 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 2947 2948 if (pkt_dev->traffic_class) { 2949 /* Version + traffic class + flow (0) */ 2950 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 2951 } 2952 2953 iph->hop_limit = 32; 2954 2955 iph->payload_len = htons(sizeof(struct udphdr) + datalen); 2956 iph->nexthdr = IPPROTO_UDP; 2957 2958 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr); 2959 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr); 2960 2961 skb->mac_header = (skb->network_header - ETH_HLEN - 2962 pkt_dev->pkt_overhead); 2963 skb->protocol = protocol; 2964 skb->dev = odev; 2965 skb->pkt_type = PACKET_HOST; 2966 2967 if (pkt_dev->nfrags <= 0) 2968 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 2969 else { 2970 int frags = pkt_dev->nfrags; 2971 int i; 2972 2973 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 2974 2975 if (frags > MAX_SKB_FRAGS) 2976 frags = MAX_SKB_FRAGS; 2977 if (datalen > frags * PAGE_SIZE) { 2978 skb_put(skb, datalen - frags * PAGE_SIZE); 2979 datalen = frags * PAGE_SIZE; 2980 } 2981 2982 i = 0; 2983 while (datalen > 0) { 2984 struct page *page = alloc_pages(GFP_KERNEL, 0); 2985 skb_shinfo(skb)->frags[i].page = page; 2986 skb_shinfo(skb)->frags[i].page_offset = 0; 2987 skb_shinfo(skb)->frags[i].size = 2988 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 2989 datalen -= skb_shinfo(skb)->frags[i].size; 2990 skb->len += skb_shinfo(skb)->frags[i].size; 2991 skb->data_len += skb_shinfo(skb)->frags[i].size; 2992 i++; 2993 skb_shinfo(skb)->nr_frags = i; 2994 } 2995 2996 while (i < frags) { 2997 int rem; 2998 2999 if (i == 0) 3000 break; 3001 3002 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 3003 if (rem == 0) 3004 break; 3005 3006 skb_shinfo(skb)->frags[i - 1].size -= rem; 3007 3008 skb_shinfo(skb)->frags[i] = 3009 skb_shinfo(skb)->frags[i - 1]; 3010 get_page(skb_shinfo(skb)->frags[i].page); 3011 skb_shinfo(skb)->frags[i].page = 3012 skb_shinfo(skb)->frags[i - 1].page; 3013 skb_shinfo(skb)->frags[i].page_offset += 3014 skb_shinfo(skb)->frags[i - 1].size; 3015 skb_shinfo(skb)->frags[i].size = rem; 3016 i++; 3017 skb_shinfo(skb)->nr_frags = i; 3018 } 3019 } 3020 3021 /* Stamp the time, and sequence number, convert them to network byte order */ 3022 /* should we update cloned packets too ? */ 3023 if (pgh) { 3024 struct timeval timestamp; 3025 3026 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 3027 pgh->seq_num = htonl(pkt_dev->seq_num); 3028 3029 do_gettimeofday(×tamp); 3030 pgh->tv_sec = htonl(timestamp.tv_sec); 3031 pgh->tv_usec = htonl(timestamp.tv_usec); 3032 } 3033 /* pkt_dev->seq_num++; FF: you really mean this? */ 3034 3035 return skb; 3036 } 3037 3038 static inline struct sk_buff *fill_packet(struct net_device *odev, 3039 struct pktgen_dev *pkt_dev) 3040 { 3041 if (pkt_dev->flags & F_IPV6) 3042 return fill_packet_ipv6(odev, pkt_dev); 3043 else 3044 return fill_packet_ipv4(odev, pkt_dev); 3045 } 3046 3047 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 3048 { 3049 pkt_dev->seq_num = 1; 3050 pkt_dev->idle_acc = 0; 3051 pkt_dev->sofar = 0; 3052 pkt_dev->tx_bytes = 0; 3053 pkt_dev->errors = 0; 3054 } 3055 3056 /* Set up structure for sending pkts, clear counters */ 3057 3058 static void pktgen_run(struct pktgen_thread *t) 3059 { 3060 struct pktgen_dev *pkt_dev; 3061 int started = 0; 3062 3063 pr_debug("pktgen: entering pktgen_run. %p\n", t); 3064 3065 if_lock(t); 3066 list_for_each_entry(pkt_dev, &t->if_list, list) { 3067 3068 /* 3069 * setup odev and create initial packet. 3070 */ 3071 pktgen_setup_inject(pkt_dev); 3072 3073 if (pkt_dev->odev) { 3074 pktgen_clear_counters(pkt_dev); 3075 pkt_dev->running = 1; /* Cranke yeself! */ 3076 pkt_dev->skb = NULL; 3077 pkt_dev->started_at = getCurUs(); 3078 pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */ 3079 pkt_dev->next_tx_ns = 0; 3080 set_pkt_overhead(pkt_dev); 3081 3082 strcpy(pkt_dev->result, "Starting"); 3083 started++; 3084 } else 3085 strcpy(pkt_dev->result, "Error starting"); 3086 } 3087 if_unlock(t); 3088 if (started) 3089 t->control &= ~(T_STOP); 3090 } 3091 3092 static void pktgen_stop_all_threads_ifs(void) 3093 { 3094 struct pktgen_thread *t; 3095 3096 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n"); 3097 3098 mutex_lock(&pktgen_thread_lock); 3099 3100 list_for_each_entry(t, &pktgen_threads, th_list) 3101 t->control |= T_STOP; 3102 3103 mutex_unlock(&pktgen_thread_lock); 3104 } 3105 3106 static int thread_is_running(struct pktgen_thread *t) 3107 { 3108 struct pktgen_dev *pkt_dev; 3109 int res = 0; 3110 3111 list_for_each_entry(pkt_dev, &t->if_list, list) 3112 if (pkt_dev->running) { 3113 res = 1; 3114 break; 3115 } 3116 return res; 3117 } 3118 3119 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3120 { 3121 if_lock(t); 3122 3123 while (thread_is_running(t)) { 3124 3125 if_unlock(t); 3126 3127 msleep_interruptible(100); 3128 3129 if (signal_pending(current)) 3130 goto signal; 3131 if_lock(t); 3132 } 3133 if_unlock(t); 3134 return 1; 3135 signal: 3136 return 0; 3137 } 3138 3139 static int pktgen_wait_all_threads_run(void) 3140 { 3141 struct pktgen_thread *t; 3142 int sig = 1; 3143 3144 mutex_lock(&pktgen_thread_lock); 3145 3146 list_for_each_entry(t, &pktgen_threads, th_list) { 3147 sig = pktgen_wait_thread_run(t); 3148 if (sig == 0) 3149 break; 3150 } 3151 3152 if (sig == 0) 3153 list_for_each_entry(t, &pktgen_threads, th_list) 3154 t->control |= (T_STOP); 3155 3156 mutex_unlock(&pktgen_thread_lock); 3157 return sig; 3158 } 3159 3160 static void pktgen_run_all_threads(void) 3161 { 3162 struct pktgen_thread *t; 3163 3164 pr_debug("pktgen: entering pktgen_run_all_threads.\n"); 3165 3166 mutex_lock(&pktgen_thread_lock); 3167 3168 list_for_each_entry(t, &pktgen_threads, th_list) 3169 t->control |= (T_RUN); 3170 3171 mutex_unlock(&pktgen_thread_lock); 3172 3173 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 3174 3175 pktgen_wait_all_threads_run(); 3176 } 3177 3178 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3179 { 3180 __u64 total_us, bps, mbps, pps, idle; 3181 char *p = pkt_dev->result; 3182 3183 total_us = pkt_dev->stopped_at - pkt_dev->started_at; 3184 3185 idle = pkt_dev->idle_acc; 3186 3187 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", 3188 (unsigned long long)total_us, 3189 (unsigned long long)(total_us - idle), 3190 (unsigned long long)idle, 3191 (unsigned long long)pkt_dev->sofar, 3192 pkt_dev->cur_pkt_size, nr_frags); 3193 3194 pps = pkt_dev->sofar * USEC_PER_SEC; 3195 3196 while ((total_us >> 32) != 0) { 3197 pps >>= 1; 3198 total_us >>= 1; 3199 } 3200 3201 do_div(pps, total_us); 3202 3203 bps = pps * 8 * pkt_dev->cur_pkt_size; 3204 3205 mbps = bps; 3206 do_div(mbps, 1000000); 3207 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3208 (unsigned long long)pps, 3209 (unsigned long long)mbps, 3210 (unsigned long long)bps, 3211 (unsigned long long)pkt_dev->errors); 3212 } 3213 3214 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3215 3216 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3217 { 3218 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3219 3220 if (!pkt_dev->running) { 3221 printk(KERN_WARNING "pktgen: interface: %s is already " 3222 "stopped\n", pkt_dev->odev->name); 3223 return -EINVAL; 3224 } 3225 3226 pkt_dev->stopped_at = getCurUs(); 3227 pkt_dev->running = 0; 3228 3229 show_results(pkt_dev, nr_frags); 3230 3231 return 0; 3232 } 3233 3234 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3235 { 3236 struct pktgen_dev *pkt_dev, *best = NULL; 3237 3238 if_lock(t); 3239 3240 list_for_each_entry(pkt_dev, &t->if_list, list) { 3241 if (!pkt_dev->running) 3242 continue; 3243 if (best == NULL) 3244 best = pkt_dev; 3245 else if (pkt_dev->next_tx_us < best->next_tx_us) 3246 best = pkt_dev; 3247 } 3248 if_unlock(t); 3249 return best; 3250 } 3251 3252 static void pktgen_stop(struct pktgen_thread *t) 3253 { 3254 struct pktgen_dev *pkt_dev; 3255 3256 pr_debug("pktgen: entering pktgen_stop\n"); 3257 3258 if_lock(t); 3259 3260 list_for_each_entry(pkt_dev, &t->if_list, list) { 3261 pktgen_stop_device(pkt_dev); 3262 if (pkt_dev->skb) 3263 kfree_skb(pkt_dev->skb); 3264 3265 pkt_dev->skb = NULL; 3266 } 3267 3268 if_unlock(t); 3269 } 3270 3271 /* 3272 * one of our devices needs to be removed - find it 3273 * and remove it 3274 */ 3275 static void pktgen_rem_one_if(struct pktgen_thread *t) 3276 { 3277 struct list_head *q, *n; 3278 struct pktgen_dev *cur; 3279 3280 pr_debug("pktgen: entering pktgen_rem_one_if\n"); 3281 3282 if_lock(t); 3283 3284 list_for_each_safe(q, n, &t->if_list) { 3285 cur = list_entry(q, struct pktgen_dev, list); 3286 3287 if (!cur->removal_mark) 3288 continue; 3289 3290 if (cur->skb) 3291 kfree_skb(cur->skb); 3292 cur->skb = NULL; 3293 3294 pktgen_remove_device(t, cur); 3295 3296 break; 3297 } 3298 3299 if_unlock(t); 3300 } 3301 3302 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3303 { 3304 struct list_head *q, *n; 3305 struct pktgen_dev *cur; 3306 3307 /* Remove all devices, free mem */ 3308 3309 pr_debug("pktgen: entering pktgen_rem_all_ifs\n"); 3310 if_lock(t); 3311 3312 list_for_each_safe(q, n, &t->if_list) { 3313 cur = list_entry(q, struct pktgen_dev, list); 3314 3315 if (cur->skb) 3316 kfree_skb(cur->skb); 3317 cur->skb = NULL; 3318 3319 pktgen_remove_device(t, cur); 3320 } 3321 3322 if_unlock(t); 3323 } 3324 3325 static void pktgen_rem_thread(struct pktgen_thread *t) 3326 { 3327 /* Remove from the thread list */ 3328 3329 remove_proc_entry(t->tsk->comm, pg_proc_dir); 3330 3331 mutex_lock(&pktgen_thread_lock); 3332 3333 list_del(&t->th_list); 3334 3335 mutex_unlock(&pktgen_thread_lock); 3336 } 3337 3338 static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev) 3339 { 3340 struct net_device *odev = NULL; 3341 struct netdev_queue *txq; 3342 __u64 idle_start = 0; 3343 u16 queue_map; 3344 int ret; 3345 3346 odev = pkt_dev->odev; 3347 3348 if (pkt_dev->delay_us || pkt_dev->delay_ns) { 3349 u64 now; 3350 3351 now = getCurUs(); 3352 if (now < pkt_dev->next_tx_us) 3353 spin(pkt_dev, pkt_dev->next_tx_us); 3354 3355 /* This is max DELAY, this has special meaning of 3356 * "never transmit" 3357 */ 3358 if (pkt_dev->delay_us == 0x7FFFFFFF) { 3359 pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us; 3360 pkt_dev->next_tx_ns = pkt_dev->delay_ns; 3361 goto out; 3362 } 3363 } 3364 3365 if (!pkt_dev->skb) { 3366 set_cur_queue_map(pkt_dev); 3367 queue_map = pkt_dev->cur_queue_map; 3368 } else { 3369 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3370 } 3371 3372 txq = netdev_get_tx_queue(odev, queue_map); 3373 if (netif_tx_queue_stopped(txq) || 3374 netif_tx_queue_frozen(txq) || 3375 need_resched()) { 3376 idle_start = getCurUs(); 3377 3378 if (!netif_running(odev)) { 3379 pktgen_stop_device(pkt_dev); 3380 if (pkt_dev->skb) 3381 kfree_skb(pkt_dev->skb); 3382 pkt_dev->skb = NULL; 3383 goto out; 3384 } 3385 if (need_resched()) 3386 schedule(); 3387 3388 pkt_dev->idle_acc += getCurUs() - idle_start; 3389 3390 if (netif_tx_queue_stopped(txq) || 3391 netif_tx_queue_frozen(txq)) { 3392 pkt_dev->next_tx_us = getCurUs(); /* TODO */ 3393 pkt_dev->next_tx_ns = 0; 3394 goto out; /* Try the next interface */ 3395 } 3396 } 3397 3398 if (pkt_dev->last_ok || !pkt_dev->skb) { 3399 if ((++pkt_dev->clone_count >= pkt_dev->clone_skb) 3400 || (!pkt_dev->skb)) { 3401 /* build a new pkt */ 3402 if (pkt_dev->skb) 3403 kfree_skb(pkt_dev->skb); 3404 3405 pkt_dev->skb = fill_packet(odev, pkt_dev); 3406 if (pkt_dev->skb == NULL) { 3407 printk(KERN_ERR "pktgen: ERROR: couldn't " 3408 "allocate skb in fill_packet.\n"); 3409 schedule(); 3410 pkt_dev->clone_count--; /* back out increment, OOM */ 3411 goto out; 3412 } 3413 pkt_dev->allocated_skbs++; 3414 pkt_dev->clone_count = 0; /* reset counter */ 3415 } 3416 } 3417 3418 /* fill_packet() might have changed the queue */ 3419 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3420 txq = netdev_get_tx_queue(odev, queue_map); 3421 3422 __netif_tx_lock_bh(txq); 3423 if (!netif_tx_queue_stopped(txq) && 3424 !netif_tx_queue_frozen(txq)) { 3425 3426 atomic_inc(&(pkt_dev->skb->users)); 3427 retry_now: 3428 ret = odev->hard_start_xmit(pkt_dev->skb, odev); 3429 if (likely(ret == NETDEV_TX_OK)) { 3430 pkt_dev->last_ok = 1; 3431 pkt_dev->sofar++; 3432 pkt_dev->seq_num++; 3433 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size; 3434 3435 } else if (ret == NETDEV_TX_LOCKED 3436 && (odev->features & NETIF_F_LLTX)) { 3437 cpu_relax(); 3438 goto retry_now; 3439 } else { /* Retry it next time */ 3440 3441 atomic_dec(&(pkt_dev->skb->users)); 3442 3443 if (debug && net_ratelimit()) 3444 printk(KERN_INFO "pktgen: Hard xmit error\n"); 3445 3446 pkt_dev->errors++; 3447 pkt_dev->last_ok = 0; 3448 } 3449 3450 pkt_dev->next_tx_us = getCurUs(); 3451 pkt_dev->next_tx_ns = 0; 3452 3453 pkt_dev->next_tx_us += pkt_dev->delay_us; 3454 pkt_dev->next_tx_ns += pkt_dev->delay_ns; 3455 3456 if (pkt_dev->next_tx_ns > 1000) { 3457 pkt_dev->next_tx_us++; 3458 pkt_dev->next_tx_ns -= 1000; 3459 } 3460 } 3461 3462 else { /* Retry it next time */ 3463 pkt_dev->last_ok = 0; 3464 pkt_dev->next_tx_us = getCurUs(); /* TODO */ 3465 pkt_dev->next_tx_ns = 0; 3466 } 3467 3468 __netif_tx_unlock_bh(txq); 3469 3470 /* If pkt_dev->count is zero, then run forever */ 3471 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3472 if (atomic_read(&(pkt_dev->skb->users)) != 1) { 3473 idle_start = getCurUs(); 3474 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3475 if (signal_pending(current)) { 3476 break; 3477 } 3478 schedule(); 3479 } 3480 pkt_dev->idle_acc += getCurUs() - idle_start; 3481 } 3482 3483 /* Done with this */ 3484 pktgen_stop_device(pkt_dev); 3485 if (pkt_dev->skb) 3486 kfree_skb(pkt_dev->skb); 3487 pkt_dev->skb = NULL; 3488 } 3489 out:; 3490 } 3491 3492 /* 3493 * Main loop of the thread goes here 3494 */ 3495 3496 static int pktgen_thread_worker(void *arg) 3497 { 3498 DEFINE_WAIT(wait); 3499 struct pktgen_thread *t = arg; 3500 struct pktgen_dev *pkt_dev = NULL; 3501 int cpu = t->cpu; 3502 3503 BUG_ON(smp_processor_id() != cpu); 3504 3505 init_waitqueue_head(&t->queue); 3506 complete(&t->start_done); 3507 3508 pr_debug("pktgen: starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); 3509 3510 set_current_state(TASK_INTERRUPTIBLE); 3511 3512 set_freezable(); 3513 3514 while (!kthread_should_stop()) { 3515 pkt_dev = next_to_run(t); 3516 3517 if (!pkt_dev && 3518 (t->control & (T_STOP | T_RUN | T_REMDEVALL | T_REMDEV)) 3519 == 0) { 3520 prepare_to_wait(&(t->queue), &wait, 3521 TASK_INTERRUPTIBLE); 3522 schedule_timeout(HZ / 10); 3523 finish_wait(&(t->queue), &wait); 3524 } 3525 3526 __set_current_state(TASK_RUNNING); 3527 3528 if (pkt_dev) 3529 pktgen_xmit(pkt_dev); 3530 3531 if (t->control & T_STOP) { 3532 pktgen_stop(t); 3533 t->control &= ~(T_STOP); 3534 } 3535 3536 if (t->control & T_RUN) { 3537 pktgen_run(t); 3538 t->control &= ~(T_RUN); 3539 } 3540 3541 if (t->control & T_REMDEVALL) { 3542 pktgen_rem_all_ifs(t); 3543 t->control &= ~(T_REMDEVALL); 3544 } 3545 3546 if (t->control & T_REMDEV) { 3547 pktgen_rem_one_if(t); 3548 t->control &= ~(T_REMDEV); 3549 } 3550 3551 try_to_freeze(); 3552 3553 set_current_state(TASK_INTERRUPTIBLE); 3554 } 3555 3556 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm); 3557 pktgen_stop(t); 3558 3559 pr_debug("pktgen: %s removing all device\n", t->tsk->comm); 3560 pktgen_rem_all_ifs(t); 3561 3562 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm); 3563 pktgen_rem_thread(t); 3564 3565 return 0; 3566 } 3567 3568 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3569 const char *ifname) 3570 { 3571 struct pktgen_dev *p, *pkt_dev = NULL; 3572 if_lock(t); 3573 3574 list_for_each_entry(p, &t->if_list, list) 3575 if (strncmp(p->odev->name, ifname, IFNAMSIZ) == 0) { 3576 pkt_dev = p; 3577 break; 3578 } 3579 3580 if_unlock(t); 3581 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev); 3582 return pkt_dev; 3583 } 3584 3585 /* 3586 * Adds a dev at front of if_list. 3587 */ 3588 3589 static int add_dev_to_thread(struct pktgen_thread *t, 3590 struct pktgen_dev *pkt_dev) 3591 { 3592 int rv = 0; 3593 3594 if_lock(t); 3595 3596 if (pkt_dev->pg_thread) { 3597 printk(KERN_ERR "pktgen: ERROR: already assigned " 3598 "to a thread.\n"); 3599 rv = -EBUSY; 3600 goto out; 3601 } 3602 3603 list_add(&pkt_dev->list, &t->if_list); 3604 pkt_dev->pg_thread = t; 3605 pkt_dev->running = 0; 3606 3607 out: 3608 if_unlock(t); 3609 return rv; 3610 } 3611 3612 /* Called under thread lock */ 3613 3614 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3615 { 3616 struct pktgen_dev *pkt_dev; 3617 int err; 3618 3619 /* We don't allow a device to be on several threads */ 3620 3621 pkt_dev = __pktgen_NN_threads(ifname, FIND); 3622 if (pkt_dev) { 3623 printk(KERN_ERR "pktgen: ERROR: interface already used.\n"); 3624 return -EBUSY; 3625 } 3626 3627 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL); 3628 if (!pkt_dev) 3629 return -ENOMEM; 3630 3631 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state)); 3632 if (pkt_dev->flows == NULL) { 3633 kfree(pkt_dev); 3634 return -ENOMEM; 3635 } 3636 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state)); 3637 3638 pkt_dev->removal_mark = 0; 3639 pkt_dev->min_pkt_size = ETH_ZLEN; 3640 pkt_dev->max_pkt_size = ETH_ZLEN; 3641 pkt_dev->nfrags = 0; 3642 pkt_dev->clone_skb = pg_clone_skb_d; 3643 pkt_dev->delay_us = pg_delay_d / 1000; 3644 pkt_dev->delay_ns = pg_delay_d % 1000; 3645 pkt_dev->count = pg_count_d; 3646 pkt_dev->sofar = 0; 3647 pkt_dev->udp_src_min = 9; /* sink port */ 3648 pkt_dev->udp_src_max = 9; 3649 pkt_dev->udp_dst_min = 9; 3650 pkt_dev->udp_dst_max = 9; 3651 3652 pkt_dev->vlan_p = 0; 3653 pkt_dev->vlan_cfi = 0; 3654 pkt_dev->vlan_id = 0xffff; 3655 pkt_dev->svlan_p = 0; 3656 pkt_dev->svlan_cfi = 0; 3657 pkt_dev->svlan_id = 0xffff; 3658 3659 err = pktgen_setup_dev(pkt_dev, ifname); 3660 if (err) 3661 goto out1; 3662 3663 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir, 3664 &pktgen_if_fops, pkt_dev); 3665 if (!pkt_dev->entry) { 3666 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n", 3667 PG_PROC_DIR, ifname); 3668 err = -EINVAL; 3669 goto out2; 3670 } 3671 #ifdef CONFIG_XFRM 3672 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3673 pkt_dev->ipsproto = IPPROTO_ESP; 3674 #endif 3675 3676 return add_dev_to_thread(t, pkt_dev); 3677 out2: 3678 dev_put(pkt_dev->odev); 3679 out1: 3680 #ifdef CONFIG_XFRM 3681 free_SAs(pkt_dev); 3682 #endif 3683 if (pkt_dev->flows) 3684 vfree(pkt_dev->flows); 3685 kfree(pkt_dev); 3686 return err; 3687 } 3688 3689 static int __init pktgen_create_thread(int cpu) 3690 { 3691 struct pktgen_thread *t; 3692 struct proc_dir_entry *pe; 3693 struct task_struct *p; 3694 3695 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL); 3696 if (!t) { 3697 printk(KERN_ERR "pktgen: ERROR: out of memory, can't " 3698 "create new thread.\n"); 3699 return -ENOMEM; 3700 } 3701 3702 spin_lock_init(&t->if_lock); 3703 t->cpu = cpu; 3704 3705 INIT_LIST_HEAD(&t->if_list); 3706 3707 list_add_tail(&t->th_list, &pktgen_threads); 3708 init_completion(&t->start_done); 3709 3710 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu); 3711 if (IS_ERR(p)) { 3712 printk(KERN_ERR "pktgen: kernel_thread() failed " 3713 "for cpu %d\n", t->cpu); 3714 list_del(&t->th_list); 3715 kfree(t); 3716 return PTR_ERR(p); 3717 } 3718 kthread_bind(p, cpu); 3719 t->tsk = p; 3720 3721 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir, 3722 &pktgen_thread_fops, t); 3723 if (!pe) { 3724 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n", 3725 PG_PROC_DIR, t->tsk->comm); 3726 kthread_stop(p); 3727 list_del(&t->th_list); 3728 kfree(t); 3729 return -EINVAL; 3730 } 3731 3732 wake_up_process(p); 3733 wait_for_completion(&t->start_done); 3734 3735 return 0; 3736 } 3737 3738 /* 3739 * Removes a device from the thread if_list. 3740 */ 3741 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3742 struct pktgen_dev *pkt_dev) 3743 { 3744 struct list_head *q, *n; 3745 struct pktgen_dev *p; 3746 3747 list_for_each_safe(q, n, &t->if_list) { 3748 p = list_entry(q, struct pktgen_dev, list); 3749 if (p == pkt_dev) 3750 list_del(&p->list); 3751 } 3752 } 3753 3754 static int pktgen_remove_device(struct pktgen_thread *t, 3755 struct pktgen_dev *pkt_dev) 3756 { 3757 3758 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev); 3759 3760 if (pkt_dev->running) { 3761 printk(KERN_WARNING "pktgen: WARNING: trying to remove a " 3762 "running interface, stopping it now.\n"); 3763 pktgen_stop_device(pkt_dev); 3764 } 3765 3766 /* Dis-associate from the interface */ 3767 3768 if (pkt_dev->odev) { 3769 dev_put(pkt_dev->odev); 3770 pkt_dev->odev = NULL; 3771 } 3772 3773 /* And update the thread if_list */ 3774 3775 _rem_dev_from_if_list(t, pkt_dev); 3776 3777 if (pkt_dev->entry) 3778 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 3779 3780 #ifdef CONFIG_XFRM 3781 free_SAs(pkt_dev); 3782 #endif 3783 if (pkt_dev->flows) 3784 vfree(pkt_dev->flows); 3785 kfree(pkt_dev); 3786 return 0; 3787 } 3788 3789 static int __init pg_init(void) 3790 { 3791 int cpu; 3792 struct proc_dir_entry *pe; 3793 3794 printk(KERN_INFO "%s", version); 3795 3796 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net); 3797 if (!pg_proc_dir) 3798 return -ENODEV; 3799 pg_proc_dir->owner = THIS_MODULE; 3800 3801 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops); 3802 if (pe == NULL) { 3803 printk(KERN_ERR "pktgen: ERROR: cannot create %s " 3804 "procfs entry.\n", PGCTRL); 3805 proc_net_remove(&init_net, PG_PROC_DIR); 3806 return -EINVAL; 3807 } 3808 3809 /* Register us to receive netdevice events */ 3810 register_netdevice_notifier(&pktgen_notifier_block); 3811 3812 for_each_online_cpu(cpu) { 3813 int err; 3814 3815 err = pktgen_create_thread(cpu); 3816 if (err) 3817 printk(KERN_WARNING "pktgen: WARNING: Cannot create " 3818 "thread for cpu %d (%d)\n", cpu, err); 3819 } 3820 3821 if (list_empty(&pktgen_threads)) { 3822 printk(KERN_ERR "pktgen: ERROR: Initialization failed for " 3823 "all threads\n"); 3824 unregister_netdevice_notifier(&pktgen_notifier_block); 3825 remove_proc_entry(PGCTRL, pg_proc_dir); 3826 proc_net_remove(&init_net, PG_PROC_DIR); 3827 return -ENODEV; 3828 } 3829 3830 return 0; 3831 } 3832 3833 static void __exit pg_cleanup(void) 3834 { 3835 struct pktgen_thread *t; 3836 struct list_head *q, *n; 3837 wait_queue_head_t queue; 3838 init_waitqueue_head(&queue); 3839 3840 /* Stop all interfaces & threads */ 3841 3842 list_for_each_safe(q, n, &pktgen_threads) { 3843 t = list_entry(q, struct pktgen_thread, th_list); 3844 kthread_stop(t->tsk); 3845 kfree(t); 3846 } 3847 3848 /* Un-register us from receiving netdevice events */ 3849 unregister_netdevice_notifier(&pktgen_notifier_block); 3850 3851 /* Clean up proc file system */ 3852 remove_proc_entry(PGCTRL, pg_proc_dir); 3853 proc_net_remove(&init_net, PG_PROC_DIR); 3854 } 3855 3856 module_init(pg_init); 3857 module_exit(pg_cleanup); 3858 3859 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se"); 3860 MODULE_DESCRIPTION("Packet Generator tool"); 3861 MODULE_LICENSE("GPL"); 3862 module_param(pg_count_d, int, 0); 3863 module_param(pg_delay_d, int, 0); 3864 module_param(pg_clone_skb_d, int, 0); 3865 module_param(debug, int, 0); 3866