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 if (!pkt_dev->odev) { 1965 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in " 1966 "setup_inject.\n"); 1967 sprintf(pkt_dev->result, 1968 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 1969 return; 1970 } 1971 1972 /* Default to the interface's mac if not explicitly set. */ 1973 1974 if (is_zero_ether_addr(pkt_dev->src_mac)) 1975 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN); 1976 1977 /* Set up Dest MAC */ 1978 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 1979 1980 /* Set up pkt size */ 1981 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 1982 1983 if (pkt_dev->flags & F_IPV6) { 1984 /* 1985 * Skip this automatic address setting until locks or functions 1986 * gets exported 1987 */ 1988 1989 #ifdef NOTNOW 1990 int i, set = 0, err = 1; 1991 struct inet6_dev *idev; 1992 1993 for (i = 0; i < IN6_ADDR_HSIZE; i++) 1994 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 1995 set = 1; 1996 break; 1997 } 1998 1999 if (!set) { 2000 2001 /* 2002 * Use linklevel address if unconfigured. 2003 * 2004 * use ipv6_get_lladdr if/when it's get exported 2005 */ 2006 2007 rcu_read_lock(); 2008 if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) { 2009 struct inet6_ifaddr *ifp; 2010 2011 read_lock_bh(&idev->lock); 2012 for (ifp = idev->addr_list; ifp; 2013 ifp = ifp->if_next) { 2014 if (ifp->scope == IFA_LINK 2015 && !(ifp-> 2016 flags & IFA_F_TENTATIVE)) { 2017 ipv6_addr_copy(&pkt_dev-> 2018 cur_in6_saddr, 2019 &ifp->addr); 2020 err = 0; 2021 break; 2022 } 2023 } 2024 read_unlock_bh(&idev->lock); 2025 } 2026 rcu_read_unlock(); 2027 if (err) 2028 printk(KERN_ERR "pktgen: ERROR: IPv6 link " 2029 "address not availble.\n"); 2030 } 2031 #endif 2032 } else { 2033 pkt_dev->saddr_min = 0; 2034 pkt_dev->saddr_max = 0; 2035 if (strlen(pkt_dev->src_min) == 0) { 2036 2037 struct in_device *in_dev; 2038 2039 rcu_read_lock(); 2040 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2041 if (in_dev) { 2042 if (in_dev->ifa_list) { 2043 pkt_dev->saddr_min = 2044 in_dev->ifa_list->ifa_address; 2045 pkt_dev->saddr_max = pkt_dev->saddr_min; 2046 } 2047 } 2048 rcu_read_unlock(); 2049 } else { 2050 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2051 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2052 } 2053 2054 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2055 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2056 } 2057 /* Initialize current values. */ 2058 pkt_dev->cur_dst_mac_offset = 0; 2059 pkt_dev->cur_src_mac_offset = 0; 2060 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2061 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2062 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2063 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2064 pkt_dev->nflows = 0; 2065 } 2066 2067 static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us) 2068 { 2069 __u64 start; 2070 __u64 now; 2071 2072 start = now = getCurUs(); 2073 while (now < spin_until_us) { 2074 /* TODO: optimize sleeping behavior */ 2075 if (spin_until_us - now > jiffies_to_usecs(1) + 1) 2076 schedule_timeout_interruptible(1); 2077 else if (spin_until_us - now > 100) { 2078 if (!pkt_dev->running) 2079 return; 2080 if (need_resched()) 2081 schedule(); 2082 } 2083 2084 now = getCurUs(); 2085 } 2086 2087 pkt_dev->idle_acc += now - start; 2088 } 2089 2090 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2091 { 2092 pkt_dev->pkt_overhead = 0; 2093 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2094 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2095 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2096 } 2097 2098 static inline int f_seen(struct pktgen_dev *pkt_dev, int flow) 2099 { 2100 2101 if (pkt_dev->flows[flow].flags & F_INIT) 2102 return 1; 2103 else 2104 return 0; 2105 } 2106 2107 static inline int f_pick(struct pktgen_dev *pkt_dev) 2108 { 2109 int flow = pkt_dev->curfl; 2110 2111 if (pkt_dev->flags & F_FLOW_SEQ) { 2112 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2113 /* reset time */ 2114 pkt_dev->flows[flow].count = 0; 2115 pkt_dev->flows[flow].flags = 0; 2116 pkt_dev->curfl += 1; 2117 if (pkt_dev->curfl >= pkt_dev->cflows) 2118 pkt_dev->curfl = 0; /*reset */ 2119 } 2120 } else { 2121 flow = random32() % pkt_dev->cflows; 2122 pkt_dev->curfl = flow; 2123 2124 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2125 pkt_dev->flows[flow].count = 0; 2126 pkt_dev->flows[flow].flags = 0; 2127 } 2128 } 2129 2130 return pkt_dev->curfl; 2131 } 2132 2133 2134 #ifdef CONFIG_XFRM 2135 /* If there was already an IPSEC SA, we keep it as is, else 2136 * we go look for it ... 2137 */ 2138 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2139 { 2140 struct xfrm_state *x = pkt_dev->flows[flow].x; 2141 if (!x) { 2142 /*slow path: we dont already have xfrm_state*/ 2143 x = xfrm_stateonly_find((xfrm_address_t *)&pkt_dev->cur_daddr, 2144 (xfrm_address_t *)&pkt_dev->cur_saddr, 2145 AF_INET, 2146 pkt_dev->ipsmode, 2147 pkt_dev->ipsproto, 0); 2148 if (x) { 2149 pkt_dev->flows[flow].x = x; 2150 set_pkt_overhead(pkt_dev); 2151 pkt_dev->pkt_overhead+=x->props.header_len; 2152 } 2153 2154 } 2155 } 2156 #endif 2157 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2158 { 2159 2160 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2161 pkt_dev->cur_queue_map = smp_processor_id(); 2162 2163 else if (pkt_dev->queue_map_min < pkt_dev->queue_map_max) { 2164 __u16 t; 2165 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2166 t = random32() % 2167 (pkt_dev->queue_map_max - 2168 pkt_dev->queue_map_min + 1) 2169 + pkt_dev->queue_map_min; 2170 } else { 2171 t = pkt_dev->cur_queue_map + 1; 2172 if (t > pkt_dev->queue_map_max) 2173 t = pkt_dev->queue_map_min; 2174 } 2175 pkt_dev->cur_queue_map = t; 2176 } 2177 } 2178 2179 /* Increment/randomize headers according to flags and current values 2180 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2181 */ 2182 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2183 { 2184 __u32 imn; 2185 __u32 imx; 2186 int flow = 0; 2187 2188 if (pkt_dev->cflows) 2189 flow = f_pick(pkt_dev); 2190 2191 /* Deal with source MAC */ 2192 if (pkt_dev->src_mac_count > 1) { 2193 __u32 mc; 2194 __u32 tmp; 2195 2196 if (pkt_dev->flags & F_MACSRC_RND) 2197 mc = random32() % pkt_dev->src_mac_count; 2198 else { 2199 mc = pkt_dev->cur_src_mac_offset++; 2200 if (pkt_dev->cur_src_mac_offset >= 2201 pkt_dev->src_mac_count) 2202 pkt_dev->cur_src_mac_offset = 0; 2203 } 2204 2205 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2206 pkt_dev->hh[11] = tmp; 2207 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2208 pkt_dev->hh[10] = tmp; 2209 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2210 pkt_dev->hh[9] = tmp; 2211 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2212 pkt_dev->hh[8] = tmp; 2213 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2214 pkt_dev->hh[7] = tmp; 2215 } 2216 2217 /* Deal with Destination MAC */ 2218 if (pkt_dev->dst_mac_count > 1) { 2219 __u32 mc; 2220 __u32 tmp; 2221 2222 if (pkt_dev->flags & F_MACDST_RND) 2223 mc = random32() % pkt_dev->dst_mac_count; 2224 2225 else { 2226 mc = pkt_dev->cur_dst_mac_offset++; 2227 if (pkt_dev->cur_dst_mac_offset >= 2228 pkt_dev->dst_mac_count) { 2229 pkt_dev->cur_dst_mac_offset = 0; 2230 } 2231 } 2232 2233 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2234 pkt_dev->hh[5] = tmp; 2235 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2236 pkt_dev->hh[4] = tmp; 2237 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2238 pkt_dev->hh[3] = tmp; 2239 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2240 pkt_dev->hh[2] = tmp; 2241 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2242 pkt_dev->hh[1] = tmp; 2243 } 2244 2245 if (pkt_dev->flags & F_MPLS_RND) { 2246 unsigned i; 2247 for (i = 0; i < pkt_dev->nr_labels; i++) 2248 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2249 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2250 ((__force __be32)random32() & 2251 htonl(0x000fffff)); 2252 } 2253 2254 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2255 pkt_dev->vlan_id = random32() & (4096-1); 2256 } 2257 2258 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2259 pkt_dev->svlan_id = random32() & (4096 - 1); 2260 } 2261 2262 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2263 if (pkt_dev->flags & F_UDPSRC_RND) 2264 pkt_dev->cur_udp_src = random32() % 2265 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2266 + pkt_dev->udp_src_min; 2267 2268 else { 2269 pkt_dev->cur_udp_src++; 2270 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2271 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2272 } 2273 } 2274 2275 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2276 if (pkt_dev->flags & F_UDPDST_RND) { 2277 pkt_dev->cur_udp_dst = random32() % 2278 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2279 + pkt_dev->udp_dst_min; 2280 } else { 2281 pkt_dev->cur_udp_dst++; 2282 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2283 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2284 } 2285 } 2286 2287 if (!(pkt_dev->flags & F_IPV6)) { 2288 2289 if ((imn = ntohl(pkt_dev->saddr_min)) < (imx = 2290 ntohl(pkt_dev-> 2291 saddr_max))) { 2292 __u32 t; 2293 if (pkt_dev->flags & F_IPSRC_RND) 2294 t = random32() % (imx - imn) + imn; 2295 else { 2296 t = ntohl(pkt_dev->cur_saddr); 2297 t++; 2298 if (t > imx) { 2299 t = imn; 2300 } 2301 } 2302 pkt_dev->cur_saddr = htonl(t); 2303 } 2304 2305 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2306 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2307 } else { 2308 imn = ntohl(pkt_dev->daddr_min); 2309 imx = ntohl(pkt_dev->daddr_max); 2310 if (imn < imx) { 2311 __u32 t; 2312 __be32 s; 2313 if (pkt_dev->flags & F_IPDST_RND) { 2314 2315 t = random32() % (imx - imn) + imn; 2316 s = htonl(t); 2317 2318 while (ipv4_is_loopback(s) || 2319 ipv4_is_multicast(s) || 2320 ipv4_is_lbcast(s) || 2321 ipv4_is_zeronet(s) || 2322 ipv4_is_local_multicast(s)) { 2323 t = random32() % (imx - imn) + imn; 2324 s = htonl(t); 2325 } 2326 pkt_dev->cur_daddr = s; 2327 } else { 2328 t = ntohl(pkt_dev->cur_daddr); 2329 t++; 2330 if (t > imx) { 2331 t = imn; 2332 } 2333 pkt_dev->cur_daddr = htonl(t); 2334 } 2335 } 2336 if (pkt_dev->cflows) { 2337 pkt_dev->flows[flow].flags |= F_INIT; 2338 pkt_dev->flows[flow].cur_daddr = 2339 pkt_dev->cur_daddr; 2340 #ifdef CONFIG_XFRM 2341 if (pkt_dev->flags & F_IPSEC_ON) 2342 get_ipsec_sa(pkt_dev, flow); 2343 #endif 2344 pkt_dev->nflows++; 2345 } 2346 } 2347 } else { /* IPV6 * */ 2348 2349 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 && 2350 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 && 2351 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 && 2352 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ; 2353 else { 2354 int i; 2355 2356 /* Only random destinations yet */ 2357 2358 for (i = 0; i < 4; i++) { 2359 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2360 (((__force __be32)random32() | 2361 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2362 pkt_dev->max_in6_daddr.s6_addr32[i]); 2363 } 2364 } 2365 } 2366 2367 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2368 __u32 t; 2369 if (pkt_dev->flags & F_TXSIZE_RND) { 2370 t = random32() % 2371 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2372 + pkt_dev->min_pkt_size; 2373 } else { 2374 t = pkt_dev->cur_pkt_size + 1; 2375 if (t > pkt_dev->max_pkt_size) 2376 t = pkt_dev->min_pkt_size; 2377 } 2378 pkt_dev->cur_pkt_size = t; 2379 } 2380 2381 set_cur_queue_map(pkt_dev); 2382 2383 pkt_dev->flows[flow].count++; 2384 } 2385 2386 2387 #ifdef CONFIG_XFRM 2388 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2389 { 2390 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2391 int err = 0; 2392 struct iphdr *iph; 2393 2394 if (!x) 2395 return 0; 2396 /* XXX: we dont support tunnel mode for now until 2397 * we resolve the dst issue */ 2398 if (x->props.mode != XFRM_MODE_TRANSPORT) 2399 return 0; 2400 2401 spin_lock(&x->lock); 2402 iph = ip_hdr(skb); 2403 2404 err = x->outer_mode->output(x, skb); 2405 if (err) 2406 goto error; 2407 err = x->type->output(x, skb); 2408 if (err) 2409 goto error; 2410 2411 x->curlft.bytes +=skb->len; 2412 x->curlft.packets++; 2413 error: 2414 spin_unlock(&x->lock); 2415 return err; 2416 } 2417 2418 static inline void free_SAs(struct pktgen_dev *pkt_dev) 2419 { 2420 if (pkt_dev->cflows) { 2421 /* let go of the SAs if we have them */ 2422 int i = 0; 2423 for (; i < pkt_dev->nflows; i++){ 2424 struct xfrm_state *x = pkt_dev->flows[i].x; 2425 if (x) { 2426 xfrm_state_put(x); 2427 pkt_dev->flows[i].x = NULL; 2428 } 2429 } 2430 } 2431 } 2432 2433 static inline int process_ipsec(struct pktgen_dev *pkt_dev, 2434 struct sk_buff *skb, __be16 protocol) 2435 { 2436 if (pkt_dev->flags & F_IPSEC_ON) { 2437 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2438 int nhead = 0; 2439 if (x) { 2440 int ret; 2441 __u8 *eth; 2442 nhead = x->props.header_len - skb_headroom(skb); 2443 if (nhead >0) { 2444 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2445 if (ret < 0) { 2446 printk(KERN_ERR "Error expanding " 2447 "ipsec packet %d\n",ret); 2448 return 0; 2449 } 2450 } 2451 2452 /* ipsec is not expecting ll header */ 2453 skb_pull(skb, ETH_HLEN); 2454 ret = pktgen_output_ipsec(skb, pkt_dev); 2455 if (ret) { 2456 printk(KERN_ERR "Error creating ipsec " 2457 "packet %d\n",ret); 2458 kfree_skb(skb); 2459 return 0; 2460 } 2461 /* restore ll */ 2462 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2463 memcpy(eth, pkt_dev->hh, 12); 2464 *(u16 *) & eth[12] = protocol; 2465 } 2466 } 2467 return 1; 2468 } 2469 #endif 2470 2471 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2472 { 2473 unsigned i; 2474 for (i = 0; i < pkt_dev->nr_labels; i++) { 2475 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2476 } 2477 mpls--; 2478 *mpls |= MPLS_STACK_BOTTOM; 2479 } 2480 2481 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2482 unsigned int prio) 2483 { 2484 return htons(id | (cfi << 12) | (prio << 13)); 2485 } 2486 2487 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2488 struct pktgen_dev *pkt_dev) 2489 { 2490 struct sk_buff *skb = NULL; 2491 __u8 *eth; 2492 struct udphdr *udph; 2493 int datalen, iplen; 2494 struct iphdr *iph; 2495 struct pktgen_hdr *pgh = NULL; 2496 __be16 protocol = htons(ETH_P_IP); 2497 __be32 *mpls; 2498 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2499 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2500 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2501 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2502 u16 queue_map; 2503 2504 if (pkt_dev->nr_labels) 2505 protocol = htons(ETH_P_MPLS_UC); 2506 2507 if (pkt_dev->vlan_id != 0xffff) 2508 protocol = htons(ETH_P_8021Q); 2509 2510 /* Update any of the values, used when we're incrementing various 2511 * fields. 2512 */ 2513 queue_map = pkt_dev->cur_queue_map; 2514 mod_cur_headers(pkt_dev); 2515 2516 datalen = (odev->hard_header_len + 16) & ~0xf; 2517 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + datalen + 2518 pkt_dev->pkt_overhead, GFP_ATOMIC); 2519 if (!skb) { 2520 sprintf(pkt_dev->result, "No memory"); 2521 return NULL; 2522 } 2523 2524 skb_reserve(skb, datalen); 2525 2526 /* Reserve for ethernet and IP header */ 2527 eth = (__u8 *) skb_push(skb, 14); 2528 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2529 if (pkt_dev->nr_labels) 2530 mpls_push(mpls, pkt_dev); 2531 2532 if (pkt_dev->vlan_id != 0xffff) { 2533 if (pkt_dev->svlan_id != 0xffff) { 2534 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2535 *svlan_tci = build_tci(pkt_dev->svlan_id, 2536 pkt_dev->svlan_cfi, 2537 pkt_dev->svlan_p); 2538 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2539 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2540 } 2541 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2542 *vlan_tci = build_tci(pkt_dev->vlan_id, 2543 pkt_dev->vlan_cfi, 2544 pkt_dev->vlan_p); 2545 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2546 *vlan_encapsulated_proto = htons(ETH_P_IP); 2547 } 2548 2549 skb->network_header = skb->tail; 2550 skb->transport_header = skb->network_header + sizeof(struct iphdr); 2551 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr)); 2552 skb_set_queue_mapping(skb, queue_map); 2553 iph = ip_hdr(skb); 2554 udph = udp_hdr(skb); 2555 2556 memcpy(eth, pkt_dev->hh, 12); 2557 *(__be16 *) & eth[12] = protocol; 2558 2559 /* Eth + IPh + UDPh + mpls */ 2560 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2561 pkt_dev->pkt_overhead; 2562 if (datalen < sizeof(struct pktgen_hdr)) 2563 datalen = sizeof(struct pktgen_hdr); 2564 2565 udph->source = htons(pkt_dev->cur_udp_src); 2566 udph->dest = htons(pkt_dev->cur_udp_dst); 2567 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2568 udph->check = 0; /* No checksum */ 2569 2570 iph->ihl = 5; 2571 iph->version = 4; 2572 iph->ttl = 32; 2573 iph->tos = pkt_dev->tos; 2574 iph->protocol = IPPROTO_UDP; /* UDP */ 2575 iph->saddr = pkt_dev->cur_saddr; 2576 iph->daddr = pkt_dev->cur_daddr; 2577 iph->frag_off = 0; 2578 iplen = 20 + 8 + datalen; 2579 iph->tot_len = htons(iplen); 2580 iph->check = 0; 2581 iph->check = ip_fast_csum((void *)iph, iph->ihl); 2582 skb->protocol = protocol; 2583 skb->mac_header = (skb->network_header - ETH_HLEN - 2584 pkt_dev->pkt_overhead); 2585 skb->dev = odev; 2586 skb->pkt_type = PACKET_HOST; 2587 2588 if (pkt_dev->nfrags <= 0) 2589 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 2590 else { 2591 int frags = pkt_dev->nfrags; 2592 int i; 2593 2594 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 2595 2596 if (frags > MAX_SKB_FRAGS) 2597 frags = MAX_SKB_FRAGS; 2598 if (datalen > frags * PAGE_SIZE) { 2599 skb_put(skb, datalen - frags * PAGE_SIZE); 2600 datalen = frags * PAGE_SIZE; 2601 } 2602 2603 i = 0; 2604 while (datalen > 0) { 2605 struct page *page = alloc_pages(GFP_KERNEL, 0); 2606 skb_shinfo(skb)->frags[i].page = page; 2607 skb_shinfo(skb)->frags[i].page_offset = 0; 2608 skb_shinfo(skb)->frags[i].size = 2609 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 2610 datalen -= skb_shinfo(skb)->frags[i].size; 2611 skb->len += skb_shinfo(skb)->frags[i].size; 2612 skb->data_len += skb_shinfo(skb)->frags[i].size; 2613 i++; 2614 skb_shinfo(skb)->nr_frags = i; 2615 } 2616 2617 while (i < frags) { 2618 int rem; 2619 2620 if (i == 0) 2621 break; 2622 2623 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 2624 if (rem == 0) 2625 break; 2626 2627 skb_shinfo(skb)->frags[i - 1].size -= rem; 2628 2629 skb_shinfo(skb)->frags[i] = 2630 skb_shinfo(skb)->frags[i - 1]; 2631 get_page(skb_shinfo(skb)->frags[i].page); 2632 skb_shinfo(skb)->frags[i].page = 2633 skb_shinfo(skb)->frags[i - 1].page; 2634 skb_shinfo(skb)->frags[i].page_offset += 2635 skb_shinfo(skb)->frags[i - 1].size; 2636 skb_shinfo(skb)->frags[i].size = rem; 2637 i++; 2638 skb_shinfo(skb)->nr_frags = i; 2639 } 2640 } 2641 2642 /* Stamp the time, and sequence number, convert them to network byte order */ 2643 2644 if (pgh) { 2645 struct timeval timestamp; 2646 2647 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2648 pgh->seq_num = htonl(pkt_dev->seq_num); 2649 2650 do_gettimeofday(×tamp); 2651 pgh->tv_sec = htonl(timestamp.tv_sec); 2652 pgh->tv_usec = htonl(timestamp.tv_usec); 2653 } 2654 2655 #ifdef CONFIG_XFRM 2656 if (!process_ipsec(pkt_dev, skb, protocol)) 2657 return NULL; 2658 #endif 2659 2660 return skb; 2661 } 2662 2663 /* 2664 * scan_ip6, fmt_ip taken from dietlibc-0.21 2665 * Author Felix von Leitner <felix-dietlibc@fefe.de> 2666 * 2667 * Slightly modified for kernel. 2668 * Should be candidate for net/ipv4/utils.c 2669 * --ro 2670 */ 2671 2672 static unsigned int scan_ip6(const char *s, char ip[16]) 2673 { 2674 unsigned int i; 2675 unsigned int len = 0; 2676 unsigned long u; 2677 char suffix[16]; 2678 unsigned int prefixlen = 0; 2679 unsigned int suffixlen = 0; 2680 __be32 tmp; 2681 char *pos; 2682 2683 for (i = 0; i < 16; i++) 2684 ip[i] = 0; 2685 2686 for (;;) { 2687 if (*s == ':') { 2688 len++; 2689 if (s[1] == ':') { /* Found "::", skip to part 2 */ 2690 s += 2; 2691 len++; 2692 break; 2693 } 2694 s++; 2695 } 2696 2697 u = simple_strtoul(s, &pos, 16); 2698 i = pos - s; 2699 if (!i) 2700 return 0; 2701 if (prefixlen == 12 && s[i] == '.') { 2702 2703 /* the last 4 bytes may be written as IPv4 address */ 2704 2705 tmp = in_aton(s); 2706 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp)); 2707 return i + len; 2708 } 2709 ip[prefixlen++] = (u >> 8); 2710 ip[prefixlen++] = (u & 255); 2711 s += i; 2712 len += i; 2713 if (prefixlen == 16) 2714 return len; 2715 } 2716 2717 /* part 2, after "::" */ 2718 for (;;) { 2719 if (*s == ':') { 2720 if (suffixlen == 0) 2721 break; 2722 s++; 2723 len++; 2724 } else if (suffixlen != 0) 2725 break; 2726 2727 u = simple_strtol(s, &pos, 16); 2728 i = pos - s; 2729 if (!i) { 2730 if (*s) 2731 len--; 2732 break; 2733 } 2734 if (suffixlen + prefixlen <= 12 && s[i] == '.') { 2735 tmp = in_aton(s); 2736 memcpy((struct in_addr *)(suffix + suffixlen), &tmp, 2737 sizeof(tmp)); 2738 suffixlen += 4; 2739 len += strlen(s); 2740 break; 2741 } 2742 suffix[suffixlen++] = (u >> 8); 2743 suffix[suffixlen++] = (u & 255); 2744 s += i; 2745 len += i; 2746 if (prefixlen + suffixlen == 16) 2747 break; 2748 } 2749 for (i = 0; i < suffixlen; i++) 2750 ip[16 - suffixlen + i] = suffix[i]; 2751 return len; 2752 } 2753 2754 static char tohex(char hexdigit) 2755 { 2756 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0'; 2757 } 2758 2759 static int fmt_xlong(char *s, unsigned int i) 2760 { 2761 char *bak = s; 2762 *s = tohex((i >> 12) & 0xf); 2763 if (s != bak || *s != '0') 2764 ++s; 2765 *s = tohex((i >> 8) & 0xf); 2766 if (s != bak || *s != '0') 2767 ++s; 2768 *s = tohex((i >> 4) & 0xf); 2769 if (s != bak || *s != '0') 2770 ++s; 2771 *s = tohex(i & 0xf); 2772 return s - bak + 1; 2773 } 2774 2775 static unsigned int fmt_ip6(char *s, const char ip[16]) 2776 { 2777 unsigned int len; 2778 unsigned int i; 2779 unsigned int temp; 2780 unsigned int compressing; 2781 int j; 2782 2783 len = 0; 2784 compressing = 0; 2785 for (j = 0; j < 16; j += 2) { 2786 2787 #ifdef V4MAPPEDPREFIX 2788 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) { 2789 inet_ntoa_r(*(struct in_addr *)(ip + 12), s); 2790 temp = strlen(s); 2791 return len + temp; 2792 } 2793 #endif 2794 temp = ((unsigned long)(unsigned char)ip[j] << 8) + 2795 (unsigned long)(unsigned char)ip[j + 1]; 2796 if (temp == 0) { 2797 if (!compressing) { 2798 compressing = 1; 2799 if (j == 0) { 2800 *s++ = ':'; 2801 ++len; 2802 } 2803 } 2804 } else { 2805 if (compressing) { 2806 compressing = 0; 2807 *s++ = ':'; 2808 ++len; 2809 } 2810 i = fmt_xlong(s, temp); 2811 len += i; 2812 s += i; 2813 if (j < 14) { 2814 *s++ = ':'; 2815 ++len; 2816 } 2817 } 2818 } 2819 if (compressing) { 2820 *s++ = ':'; 2821 ++len; 2822 } 2823 *s = 0; 2824 return len; 2825 } 2826 2827 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2828 struct pktgen_dev *pkt_dev) 2829 { 2830 struct sk_buff *skb = NULL; 2831 __u8 *eth; 2832 struct udphdr *udph; 2833 int datalen; 2834 struct ipv6hdr *iph; 2835 struct pktgen_hdr *pgh = NULL; 2836 __be16 protocol = htons(ETH_P_IPV6); 2837 __be32 *mpls; 2838 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2839 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2840 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2841 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2842 u16 queue_map; 2843 2844 if (pkt_dev->nr_labels) 2845 protocol = htons(ETH_P_MPLS_UC); 2846 2847 if (pkt_dev->vlan_id != 0xffff) 2848 protocol = htons(ETH_P_8021Q); 2849 2850 /* Update any of the values, used when we're incrementing various 2851 * fields. 2852 */ 2853 queue_map = pkt_dev->cur_queue_map; 2854 mod_cur_headers(pkt_dev); 2855 2856 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16 + 2857 pkt_dev->pkt_overhead, GFP_ATOMIC); 2858 if (!skb) { 2859 sprintf(pkt_dev->result, "No memory"); 2860 return NULL; 2861 } 2862 2863 skb_reserve(skb, 16); 2864 2865 /* Reserve for ethernet and IP header */ 2866 eth = (__u8 *) skb_push(skb, 14); 2867 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2868 if (pkt_dev->nr_labels) 2869 mpls_push(mpls, pkt_dev); 2870 2871 if (pkt_dev->vlan_id != 0xffff) { 2872 if (pkt_dev->svlan_id != 0xffff) { 2873 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2874 *svlan_tci = build_tci(pkt_dev->svlan_id, 2875 pkt_dev->svlan_cfi, 2876 pkt_dev->svlan_p); 2877 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2878 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2879 } 2880 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2881 *vlan_tci = build_tci(pkt_dev->vlan_id, 2882 pkt_dev->vlan_cfi, 2883 pkt_dev->vlan_p); 2884 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2885 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 2886 } 2887 2888 skb->network_header = skb->tail; 2889 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr); 2890 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr)); 2891 skb_set_queue_mapping(skb, queue_map); 2892 iph = ipv6_hdr(skb); 2893 udph = udp_hdr(skb); 2894 2895 memcpy(eth, pkt_dev->hh, 12); 2896 *(__be16 *) & eth[12] = protocol; 2897 2898 /* Eth + IPh + UDPh + mpls */ 2899 datalen = pkt_dev->cur_pkt_size - 14 - 2900 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 2901 pkt_dev->pkt_overhead; 2902 2903 if (datalen < sizeof(struct pktgen_hdr)) { 2904 datalen = sizeof(struct pktgen_hdr); 2905 if (net_ratelimit()) 2906 printk(KERN_INFO "pktgen: increased datalen to %d\n", 2907 datalen); 2908 } 2909 2910 udph->source = htons(pkt_dev->cur_udp_src); 2911 udph->dest = htons(pkt_dev->cur_udp_dst); 2912 udph->len = htons(datalen + sizeof(struct udphdr)); 2913 udph->check = 0; /* No checksum */ 2914 2915 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 2916 2917 if (pkt_dev->traffic_class) { 2918 /* Version + traffic class + flow (0) */ 2919 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 2920 } 2921 2922 iph->hop_limit = 32; 2923 2924 iph->payload_len = htons(sizeof(struct udphdr) + datalen); 2925 iph->nexthdr = IPPROTO_UDP; 2926 2927 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr); 2928 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr); 2929 2930 skb->mac_header = (skb->network_header - ETH_HLEN - 2931 pkt_dev->pkt_overhead); 2932 skb->protocol = protocol; 2933 skb->dev = odev; 2934 skb->pkt_type = PACKET_HOST; 2935 2936 if (pkt_dev->nfrags <= 0) 2937 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 2938 else { 2939 int frags = pkt_dev->nfrags; 2940 int i; 2941 2942 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 2943 2944 if (frags > MAX_SKB_FRAGS) 2945 frags = MAX_SKB_FRAGS; 2946 if (datalen > frags * PAGE_SIZE) { 2947 skb_put(skb, datalen - frags * PAGE_SIZE); 2948 datalen = frags * PAGE_SIZE; 2949 } 2950 2951 i = 0; 2952 while (datalen > 0) { 2953 struct page *page = alloc_pages(GFP_KERNEL, 0); 2954 skb_shinfo(skb)->frags[i].page = page; 2955 skb_shinfo(skb)->frags[i].page_offset = 0; 2956 skb_shinfo(skb)->frags[i].size = 2957 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 2958 datalen -= skb_shinfo(skb)->frags[i].size; 2959 skb->len += skb_shinfo(skb)->frags[i].size; 2960 skb->data_len += skb_shinfo(skb)->frags[i].size; 2961 i++; 2962 skb_shinfo(skb)->nr_frags = i; 2963 } 2964 2965 while (i < frags) { 2966 int rem; 2967 2968 if (i == 0) 2969 break; 2970 2971 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 2972 if (rem == 0) 2973 break; 2974 2975 skb_shinfo(skb)->frags[i - 1].size -= rem; 2976 2977 skb_shinfo(skb)->frags[i] = 2978 skb_shinfo(skb)->frags[i - 1]; 2979 get_page(skb_shinfo(skb)->frags[i].page); 2980 skb_shinfo(skb)->frags[i].page = 2981 skb_shinfo(skb)->frags[i - 1].page; 2982 skb_shinfo(skb)->frags[i].page_offset += 2983 skb_shinfo(skb)->frags[i - 1].size; 2984 skb_shinfo(skb)->frags[i].size = rem; 2985 i++; 2986 skb_shinfo(skb)->nr_frags = i; 2987 } 2988 } 2989 2990 /* Stamp the time, and sequence number, convert them to network byte order */ 2991 /* should we update cloned packets too ? */ 2992 if (pgh) { 2993 struct timeval timestamp; 2994 2995 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2996 pgh->seq_num = htonl(pkt_dev->seq_num); 2997 2998 do_gettimeofday(×tamp); 2999 pgh->tv_sec = htonl(timestamp.tv_sec); 3000 pgh->tv_usec = htonl(timestamp.tv_usec); 3001 } 3002 /* pkt_dev->seq_num++; FF: you really mean this? */ 3003 3004 return skb; 3005 } 3006 3007 static inline struct sk_buff *fill_packet(struct net_device *odev, 3008 struct pktgen_dev *pkt_dev) 3009 { 3010 if (pkt_dev->flags & F_IPV6) 3011 return fill_packet_ipv6(odev, pkt_dev); 3012 else 3013 return fill_packet_ipv4(odev, pkt_dev); 3014 } 3015 3016 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 3017 { 3018 pkt_dev->seq_num = 1; 3019 pkt_dev->idle_acc = 0; 3020 pkt_dev->sofar = 0; 3021 pkt_dev->tx_bytes = 0; 3022 pkt_dev->errors = 0; 3023 } 3024 3025 /* Set up structure for sending pkts, clear counters */ 3026 3027 static void pktgen_run(struct pktgen_thread *t) 3028 { 3029 struct pktgen_dev *pkt_dev; 3030 int started = 0; 3031 3032 pr_debug("pktgen: entering pktgen_run. %p\n", t); 3033 3034 if_lock(t); 3035 list_for_each_entry(pkt_dev, &t->if_list, list) { 3036 3037 /* 3038 * setup odev and create initial packet. 3039 */ 3040 pktgen_setup_inject(pkt_dev); 3041 3042 if (pkt_dev->odev) { 3043 pktgen_clear_counters(pkt_dev); 3044 pkt_dev->running = 1; /* Cranke yeself! */ 3045 pkt_dev->skb = NULL; 3046 pkt_dev->started_at = getCurUs(); 3047 pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */ 3048 pkt_dev->next_tx_ns = 0; 3049 set_pkt_overhead(pkt_dev); 3050 3051 strcpy(pkt_dev->result, "Starting"); 3052 started++; 3053 } else 3054 strcpy(pkt_dev->result, "Error starting"); 3055 } 3056 if_unlock(t); 3057 if (started) 3058 t->control &= ~(T_STOP); 3059 } 3060 3061 static void pktgen_stop_all_threads_ifs(void) 3062 { 3063 struct pktgen_thread *t; 3064 3065 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n"); 3066 3067 mutex_lock(&pktgen_thread_lock); 3068 3069 list_for_each_entry(t, &pktgen_threads, th_list) 3070 t->control |= T_STOP; 3071 3072 mutex_unlock(&pktgen_thread_lock); 3073 } 3074 3075 static int thread_is_running(struct pktgen_thread *t) 3076 { 3077 struct pktgen_dev *pkt_dev; 3078 int res = 0; 3079 3080 list_for_each_entry(pkt_dev, &t->if_list, list) 3081 if (pkt_dev->running) { 3082 res = 1; 3083 break; 3084 } 3085 return res; 3086 } 3087 3088 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3089 { 3090 if_lock(t); 3091 3092 while (thread_is_running(t)) { 3093 3094 if_unlock(t); 3095 3096 msleep_interruptible(100); 3097 3098 if (signal_pending(current)) 3099 goto signal; 3100 if_lock(t); 3101 } 3102 if_unlock(t); 3103 return 1; 3104 signal: 3105 return 0; 3106 } 3107 3108 static int pktgen_wait_all_threads_run(void) 3109 { 3110 struct pktgen_thread *t; 3111 int sig = 1; 3112 3113 mutex_lock(&pktgen_thread_lock); 3114 3115 list_for_each_entry(t, &pktgen_threads, th_list) { 3116 sig = pktgen_wait_thread_run(t); 3117 if (sig == 0) 3118 break; 3119 } 3120 3121 if (sig == 0) 3122 list_for_each_entry(t, &pktgen_threads, th_list) 3123 t->control |= (T_STOP); 3124 3125 mutex_unlock(&pktgen_thread_lock); 3126 return sig; 3127 } 3128 3129 static void pktgen_run_all_threads(void) 3130 { 3131 struct pktgen_thread *t; 3132 3133 pr_debug("pktgen: entering pktgen_run_all_threads.\n"); 3134 3135 mutex_lock(&pktgen_thread_lock); 3136 3137 list_for_each_entry(t, &pktgen_threads, th_list) 3138 t->control |= (T_RUN); 3139 3140 mutex_unlock(&pktgen_thread_lock); 3141 3142 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 3143 3144 pktgen_wait_all_threads_run(); 3145 } 3146 3147 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3148 { 3149 __u64 total_us, bps, mbps, pps, idle; 3150 char *p = pkt_dev->result; 3151 3152 total_us = pkt_dev->stopped_at - pkt_dev->started_at; 3153 3154 idle = pkt_dev->idle_acc; 3155 3156 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", 3157 (unsigned long long)total_us, 3158 (unsigned long long)(total_us - idle), 3159 (unsigned long long)idle, 3160 (unsigned long long)pkt_dev->sofar, 3161 pkt_dev->cur_pkt_size, nr_frags); 3162 3163 pps = pkt_dev->sofar * USEC_PER_SEC; 3164 3165 while ((total_us >> 32) != 0) { 3166 pps >>= 1; 3167 total_us >>= 1; 3168 } 3169 3170 do_div(pps, total_us); 3171 3172 bps = pps * 8 * pkt_dev->cur_pkt_size; 3173 3174 mbps = bps; 3175 do_div(mbps, 1000000); 3176 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3177 (unsigned long long)pps, 3178 (unsigned long long)mbps, 3179 (unsigned long long)bps, 3180 (unsigned long long)pkt_dev->errors); 3181 } 3182 3183 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3184 3185 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3186 { 3187 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3188 3189 if (!pkt_dev->running) { 3190 printk(KERN_WARNING "pktgen: interface: %s is already " 3191 "stopped\n", pkt_dev->odev->name); 3192 return -EINVAL; 3193 } 3194 3195 pkt_dev->stopped_at = getCurUs(); 3196 pkt_dev->running = 0; 3197 3198 show_results(pkt_dev, nr_frags); 3199 3200 return 0; 3201 } 3202 3203 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3204 { 3205 struct pktgen_dev *pkt_dev, *best = NULL; 3206 3207 if_lock(t); 3208 3209 list_for_each_entry(pkt_dev, &t->if_list, list) { 3210 if (!pkt_dev->running) 3211 continue; 3212 if (best == NULL) 3213 best = pkt_dev; 3214 else if (pkt_dev->next_tx_us < best->next_tx_us) 3215 best = pkt_dev; 3216 } 3217 if_unlock(t); 3218 return best; 3219 } 3220 3221 static void pktgen_stop(struct pktgen_thread *t) 3222 { 3223 struct pktgen_dev *pkt_dev; 3224 3225 pr_debug("pktgen: entering pktgen_stop\n"); 3226 3227 if_lock(t); 3228 3229 list_for_each_entry(pkt_dev, &t->if_list, list) { 3230 pktgen_stop_device(pkt_dev); 3231 if (pkt_dev->skb) 3232 kfree_skb(pkt_dev->skb); 3233 3234 pkt_dev->skb = NULL; 3235 } 3236 3237 if_unlock(t); 3238 } 3239 3240 /* 3241 * one of our devices needs to be removed - find it 3242 * and remove it 3243 */ 3244 static void pktgen_rem_one_if(struct pktgen_thread *t) 3245 { 3246 struct list_head *q, *n; 3247 struct pktgen_dev *cur; 3248 3249 pr_debug("pktgen: entering pktgen_rem_one_if\n"); 3250 3251 if_lock(t); 3252 3253 list_for_each_safe(q, n, &t->if_list) { 3254 cur = list_entry(q, struct pktgen_dev, list); 3255 3256 if (!cur->removal_mark) 3257 continue; 3258 3259 if (cur->skb) 3260 kfree_skb(cur->skb); 3261 cur->skb = NULL; 3262 3263 pktgen_remove_device(t, cur); 3264 3265 break; 3266 } 3267 3268 if_unlock(t); 3269 } 3270 3271 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3272 { 3273 struct list_head *q, *n; 3274 struct pktgen_dev *cur; 3275 3276 /* Remove all devices, free mem */ 3277 3278 pr_debug("pktgen: entering pktgen_rem_all_ifs\n"); 3279 if_lock(t); 3280 3281 list_for_each_safe(q, n, &t->if_list) { 3282 cur = list_entry(q, struct pktgen_dev, list); 3283 3284 if (cur->skb) 3285 kfree_skb(cur->skb); 3286 cur->skb = NULL; 3287 3288 pktgen_remove_device(t, cur); 3289 } 3290 3291 if_unlock(t); 3292 } 3293 3294 static void pktgen_rem_thread(struct pktgen_thread *t) 3295 { 3296 /* Remove from the thread list */ 3297 3298 remove_proc_entry(t->tsk->comm, pg_proc_dir); 3299 3300 mutex_lock(&pktgen_thread_lock); 3301 3302 list_del(&t->th_list); 3303 3304 mutex_unlock(&pktgen_thread_lock); 3305 } 3306 3307 static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev) 3308 { 3309 struct net_device *odev = NULL; 3310 struct netdev_queue *txq; 3311 __u64 idle_start = 0; 3312 u16 queue_map; 3313 int ret; 3314 3315 odev = pkt_dev->odev; 3316 3317 if (pkt_dev->delay_us || pkt_dev->delay_ns) { 3318 u64 now; 3319 3320 now = getCurUs(); 3321 if (now < pkt_dev->next_tx_us) 3322 spin(pkt_dev, pkt_dev->next_tx_us); 3323 3324 /* This is max DELAY, this has special meaning of 3325 * "never transmit" 3326 */ 3327 if (pkt_dev->delay_us == 0x7FFFFFFF) { 3328 pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us; 3329 pkt_dev->next_tx_ns = pkt_dev->delay_ns; 3330 goto out; 3331 } 3332 } 3333 3334 if (!pkt_dev->skb) { 3335 set_cur_queue_map(pkt_dev); 3336 queue_map = pkt_dev->cur_queue_map; 3337 } else { 3338 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3339 } 3340 3341 txq = netdev_get_tx_queue(odev, queue_map); 3342 if (netif_tx_queue_stopped(txq) || 3343 netif_tx_queue_frozen(txq) || 3344 need_resched()) { 3345 idle_start = getCurUs(); 3346 3347 if (!netif_running(odev)) { 3348 pktgen_stop_device(pkt_dev); 3349 if (pkt_dev->skb) 3350 kfree_skb(pkt_dev->skb); 3351 pkt_dev->skb = NULL; 3352 goto out; 3353 } 3354 if (need_resched()) 3355 schedule(); 3356 3357 pkt_dev->idle_acc += getCurUs() - idle_start; 3358 3359 if (netif_tx_queue_stopped(txq) || 3360 netif_tx_queue_frozen(txq)) { 3361 pkt_dev->next_tx_us = getCurUs(); /* TODO */ 3362 pkt_dev->next_tx_ns = 0; 3363 goto out; /* Try the next interface */ 3364 } 3365 } 3366 3367 if (pkt_dev->last_ok || !pkt_dev->skb) { 3368 if ((++pkt_dev->clone_count >= pkt_dev->clone_skb) 3369 || (!pkt_dev->skb)) { 3370 /* build a new pkt */ 3371 if (pkt_dev->skb) 3372 kfree_skb(pkt_dev->skb); 3373 3374 pkt_dev->skb = fill_packet(odev, pkt_dev); 3375 if (pkt_dev->skb == NULL) { 3376 printk(KERN_ERR "pktgen: ERROR: couldn't " 3377 "allocate skb in fill_packet.\n"); 3378 schedule(); 3379 pkt_dev->clone_count--; /* back out increment, OOM */ 3380 goto out; 3381 } 3382 pkt_dev->allocated_skbs++; 3383 pkt_dev->clone_count = 0; /* reset counter */ 3384 } 3385 } 3386 3387 /* fill_packet() might have changed the queue */ 3388 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3389 txq = netdev_get_tx_queue(odev, queue_map); 3390 3391 __netif_tx_lock_bh(txq); 3392 if (!netif_tx_queue_stopped(txq) && 3393 !netif_tx_queue_frozen(txq)) { 3394 3395 atomic_inc(&(pkt_dev->skb->users)); 3396 retry_now: 3397 ret = odev->hard_start_xmit(pkt_dev->skb, odev); 3398 if (likely(ret == NETDEV_TX_OK)) { 3399 pkt_dev->last_ok = 1; 3400 pkt_dev->sofar++; 3401 pkt_dev->seq_num++; 3402 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size; 3403 3404 } else if (ret == NETDEV_TX_LOCKED 3405 && (odev->features & NETIF_F_LLTX)) { 3406 cpu_relax(); 3407 goto retry_now; 3408 } else { /* Retry it next time */ 3409 3410 atomic_dec(&(pkt_dev->skb->users)); 3411 3412 if (debug && net_ratelimit()) 3413 printk(KERN_INFO "pktgen: Hard xmit error\n"); 3414 3415 pkt_dev->errors++; 3416 pkt_dev->last_ok = 0; 3417 } 3418 3419 pkt_dev->next_tx_us = getCurUs(); 3420 pkt_dev->next_tx_ns = 0; 3421 3422 pkt_dev->next_tx_us += pkt_dev->delay_us; 3423 pkt_dev->next_tx_ns += pkt_dev->delay_ns; 3424 3425 if (pkt_dev->next_tx_ns > 1000) { 3426 pkt_dev->next_tx_us++; 3427 pkt_dev->next_tx_ns -= 1000; 3428 } 3429 } 3430 3431 else { /* Retry it next time */ 3432 pkt_dev->last_ok = 0; 3433 pkt_dev->next_tx_us = getCurUs(); /* TODO */ 3434 pkt_dev->next_tx_ns = 0; 3435 } 3436 3437 __netif_tx_unlock_bh(txq); 3438 3439 /* If pkt_dev->count is zero, then run forever */ 3440 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3441 if (atomic_read(&(pkt_dev->skb->users)) != 1) { 3442 idle_start = getCurUs(); 3443 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3444 if (signal_pending(current)) { 3445 break; 3446 } 3447 schedule(); 3448 } 3449 pkt_dev->idle_acc += getCurUs() - idle_start; 3450 } 3451 3452 /* Done with this */ 3453 pktgen_stop_device(pkt_dev); 3454 if (pkt_dev->skb) 3455 kfree_skb(pkt_dev->skb); 3456 pkt_dev->skb = NULL; 3457 } 3458 out:; 3459 } 3460 3461 /* 3462 * Main loop of the thread goes here 3463 */ 3464 3465 static int pktgen_thread_worker(void *arg) 3466 { 3467 DEFINE_WAIT(wait); 3468 struct pktgen_thread *t = arg; 3469 struct pktgen_dev *pkt_dev = NULL; 3470 int cpu = t->cpu; 3471 3472 BUG_ON(smp_processor_id() != cpu); 3473 3474 init_waitqueue_head(&t->queue); 3475 complete(&t->start_done); 3476 3477 pr_debug("pktgen: starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); 3478 3479 set_current_state(TASK_INTERRUPTIBLE); 3480 3481 set_freezable(); 3482 3483 while (!kthread_should_stop()) { 3484 pkt_dev = next_to_run(t); 3485 3486 if (!pkt_dev && 3487 (t->control & (T_STOP | T_RUN | T_REMDEVALL | T_REMDEV)) 3488 == 0) { 3489 prepare_to_wait(&(t->queue), &wait, 3490 TASK_INTERRUPTIBLE); 3491 schedule_timeout(HZ / 10); 3492 finish_wait(&(t->queue), &wait); 3493 } 3494 3495 __set_current_state(TASK_RUNNING); 3496 3497 if (pkt_dev) 3498 pktgen_xmit(pkt_dev); 3499 3500 if (t->control & T_STOP) { 3501 pktgen_stop(t); 3502 t->control &= ~(T_STOP); 3503 } 3504 3505 if (t->control & T_RUN) { 3506 pktgen_run(t); 3507 t->control &= ~(T_RUN); 3508 } 3509 3510 if (t->control & T_REMDEVALL) { 3511 pktgen_rem_all_ifs(t); 3512 t->control &= ~(T_REMDEVALL); 3513 } 3514 3515 if (t->control & T_REMDEV) { 3516 pktgen_rem_one_if(t); 3517 t->control &= ~(T_REMDEV); 3518 } 3519 3520 try_to_freeze(); 3521 3522 set_current_state(TASK_INTERRUPTIBLE); 3523 } 3524 3525 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm); 3526 pktgen_stop(t); 3527 3528 pr_debug("pktgen: %s removing all device\n", t->tsk->comm); 3529 pktgen_rem_all_ifs(t); 3530 3531 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm); 3532 pktgen_rem_thread(t); 3533 3534 return 0; 3535 } 3536 3537 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3538 const char *ifname) 3539 { 3540 struct pktgen_dev *p, *pkt_dev = NULL; 3541 if_lock(t); 3542 3543 list_for_each_entry(p, &t->if_list, list) 3544 if (strncmp(p->odev->name, ifname, IFNAMSIZ) == 0) { 3545 pkt_dev = p; 3546 break; 3547 } 3548 3549 if_unlock(t); 3550 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev); 3551 return pkt_dev; 3552 } 3553 3554 /* 3555 * Adds a dev at front of if_list. 3556 */ 3557 3558 static int add_dev_to_thread(struct pktgen_thread *t, 3559 struct pktgen_dev *pkt_dev) 3560 { 3561 int rv = 0; 3562 3563 if_lock(t); 3564 3565 if (pkt_dev->pg_thread) { 3566 printk(KERN_ERR "pktgen: ERROR: already assigned " 3567 "to a thread.\n"); 3568 rv = -EBUSY; 3569 goto out; 3570 } 3571 3572 list_add(&pkt_dev->list, &t->if_list); 3573 pkt_dev->pg_thread = t; 3574 pkt_dev->running = 0; 3575 3576 out: 3577 if_unlock(t); 3578 return rv; 3579 } 3580 3581 /* Called under thread lock */ 3582 3583 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3584 { 3585 struct pktgen_dev *pkt_dev; 3586 int err; 3587 3588 /* We don't allow a device to be on several threads */ 3589 3590 pkt_dev = __pktgen_NN_threads(ifname, FIND); 3591 if (pkt_dev) { 3592 printk(KERN_ERR "pktgen: ERROR: interface already used.\n"); 3593 return -EBUSY; 3594 } 3595 3596 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL); 3597 if (!pkt_dev) 3598 return -ENOMEM; 3599 3600 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state)); 3601 if (pkt_dev->flows == NULL) { 3602 kfree(pkt_dev); 3603 return -ENOMEM; 3604 } 3605 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state)); 3606 3607 pkt_dev->removal_mark = 0; 3608 pkt_dev->min_pkt_size = ETH_ZLEN; 3609 pkt_dev->max_pkt_size = ETH_ZLEN; 3610 pkt_dev->nfrags = 0; 3611 pkt_dev->clone_skb = pg_clone_skb_d; 3612 pkt_dev->delay_us = pg_delay_d / 1000; 3613 pkt_dev->delay_ns = pg_delay_d % 1000; 3614 pkt_dev->count = pg_count_d; 3615 pkt_dev->sofar = 0; 3616 pkt_dev->udp_src_min = 9; /* sink port */ 3617 pkt_dev->udp_src_max = 9; 3618 pkt_dev->udp_dst_min = 9; 3619 pkt_dev->udp_dst_max = 9; 3620 3621 pkt_dev->vlan_p = 0; 3622 pkt_dev->vlan_cfi = 0; 3623 pkt_dev->vlan_id = 0xffff; 3624 pkt_dev->svlan_p = 0; 3625 pkt_dev->svlan_cfi = 0; 3626 pkt_dev->svlan_id = 0xffff; 3627 3628 err = pktgen_setup_dev(pkt_dev, ifname); 3629 if (err) 3630 goto out1; 3631 3632 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir, 3633 &pktgen_if_fops, pkt_dev); 3634 if (!pkt_dev->entry) { 3635 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n", 3636 PG_PROC_DIR, ifname); 3637 err = -EINVAL; 3638 goto out2; 3639 } 3640 #ifdef CONFIG_XFRM 3641 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3642 pkt_dev->ipsproto = IPPROTO_ESP; 3643 #endif 3644 3645 return add_dev_to_thread(t, pkt_dev); 3646 out2: 3647 dev_put(pkt_dev->odev); 3648 out1: 3649 #ifdef CONFIG_XFRM 3650 free_SAs(pkt_dev); 3651 #endif 3652 if (pkt_dev->flows) 3653 vfree(pkt_dev->flows); 3654 kfree(pkt_dev); 3655 return err; 3656 } 3657 3658 static int __init pktgen_create_thread(int cpu) 3659 { 3660 struct pktgen_thread *t; 3661 struct proc_dir_entry *pe; 3662 struct task_struct *p; 3663 3664 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL); 3665 if (!t) { 3666 printk(KERN_ERR "pktgen: ERROR: out of memory, can't " 3667 "create new thread.\n"); 3668 return -ENOMEM; 3669 } 3670 3671 spin_lock_init(&t->if_lock); 3672 t->cpu = cpu; 3673 3674 INIT_LIST_HEAD(&t->if_list); 3675 3676 list_add_tail(&t->th_list, &pktgen_threads); 3677 init_completion(&t->start_done); 3678 3679 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu); 3680 if (IS_ERR(p)) { 3681 printk(KERN_ERR "pktgen: kernel_thread() failed " 3682 "for cpu %d\n", t->cpu); 3683 list_del(&t->th_list); 3684 kfree(t); 3685 return PTR_ERR(p); 3686 } 3687 kthread_bind(p, cpu); 3688 t->tsk = p; 3689 3690 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir, 3691 &pktgen_thread_fops, t); 3692 if (!pe) { 3693 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n", 3694 PG_PROC_DIR, t->tsk->comm); 3695 kthread_stop(p); 3696 list_del(&t->th_list); 3697 kfree(t); 3698 return -EINVAL; 3699 } 3700 3701 wake_up_process(p); 3702 wait_for_completion(&t->start_done); 3703 3704 return 0; 3705 } 3706 3707 /* 3708 * Removes a device from the thread if_list. 3709 */ 3710 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3711 struct pktgen_dev *pkt_dev) 3712 { 3713 struct list_head *q, *n; 3714 struct pktgen_dev *p; 3715 3716 list_for_each_safe(q, n, &t->if_list) { 3717 p = list_entry(q, struct pktgen_dev, list); 3718 if (p == pkt_dev) 3719 list_del(&p->list); 3720 } 3721 } 3722 3723 static int pktgen_remove_device(struct pktgen_thread *t, 3724 struct pktgen_dev *pkt_dev) 3725 { 3726 3727 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev); 3728 3729 if (pkt_dev->running) { 3730 printk(KERN_WARNING "pktgen: WARNING: trying to remove a " 3731 "running interface, stopping it now.\n"); 3732 pktgen_stop_device(pkt_dev); 3733 } 3734 3735 /* Dis-associate from the interface */ 3736 3737 if (pkt_dev->odev) { 3738 dev_put(pkt_dev->odev); 3739 pkt_dev->odev = NULL; 3740 } 3741 3742 /* And update the thread if_list */ 3743 3744 _rem_dev_from_if_list(t, pkt_dev); 3745 3746 if (pkt_dev->entry) 3747 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 3748 3749 #ifdef CONFIG_XFRM 3750 free_SAs(pkt_dev); 3751 #endif 3752 if (pkt_dev->flows) 3753 vfree(pkt_dev->flows); 3754 kfree(pkt_dev); 3755 return 0; 3756 } 3757 3758 static int __init pg_init(void) 3759 { 3760 int cpu; 3761 struct proc_dir_entry *pe; 3762 3763 printk(KERN_INFO "%s", version); 3764 3765 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net); 3766 if (!pg_proc_dir) 3767 return -ENODEV; 3768 pg_proc_dir->owner = THIS_MODULE; 3769 3770 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops); 3771 if (pe == NULL) { 3772 printk(KERN_ERR "pktgen: ERROR: cannot create %s " 3773 "procfs entry.\n", PGCTRL); 3774 proc_net_remove(&init_net, PG_PROC_DIR); 3775 return -EINVAL; 3776 } 3777 3778 /* Register us to receive netdevice events */ 3779 register_netdevice_notifier(&pktgen_notifier_block); 3780 3781 for_each_online_cpu(cpu) { 3782 int err; 3783 3784 err = pktgen_create_thread(cpu); 3785 if (err) 3786 printk(KERN_WARNING "pktgen: WARNING: Cannot create " 3787 "thread for cpu %d (%d)\n", cpu, err); 3788 } 3789 3790 if (list_empty(&pktgen_threads)) { 3791 printk(KERN_ERR "pktgen: ERROR: Initialization failed for " 3792 "all threads\n"); 3793 unregister_netdevice_notifier(&pktgen_notifier_block); 3794 remove_proc_entry(PGCTRL, pg_proc_dir); 3795 proc_net_remove(&init_net, PG_PROC_DIR); 3796 return -ENODEV; 3797 } 3798 3799 return 0; 3800 } 3801 3802 static void __exit pg_cleanup(void) 3803 { 3804 struct pktgen_thread *t; 3805 struct list_head *q, *n; 3806 wait_queue_head_t queue; 3807 init_waitqueue_head(&queue); 3808 3809 /* Stop all interfaces & threads */ 3810 3811 list_for_each_safe(q, n, &pktgen_threads) { 3812 t = list_entry(q, struct pktgen_thread, th_list); 3813 kthread_stop(t->tsk); 3814 kfree(t); 3815 } 3816 3817 /* Un-register us from receiving netdevice events */ 3818 unregister_netdevice_notifier(&pktgen_notifier_block); 3819 3820 /* Clean up proc file system */ 3821 remove_proc_entry(PGCTRL, pg_proc_dir); 3822 proc_net_remove(&init_net, PG_PROC_DIR); 3823 } 3824 3825 module_init(pg_init); 3826 module_exit(pg_cleanup); 3827 3828 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se"); 3829 MODULE_DESCRIPTION("Packet Generator tool"); 3830 MODULE_LICENSE("GPL"); 3831 module_param(pg_count_d, int, 0); 3832 module_param(pg_delay_d, int, 0); 3833 module_param(pg_clone_skb_d, int, 0); 3834 module_param(debug, int, 0); 3835