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_reset_all_threads(void); 426 static void pktgen_stop_all_threads_ifs(void); 427 static int pktgen_stop_device(struct pktgen_dev *pkt_dev); 428 static void pktgen_stop(struct pktgen_thread *t); 429 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); 430 431 static unsigned int scan_ip6(const char *s, char ip[16]); 432 static unsigned int fmt_ip6(char *s, const char ip[16]); 433 434 /* Module parameters, defaults. */ 435 static int pg_count_d = 1000; /* 1000 pkts by default */ 436 static int pg_delay_d; 437 static int pg_clone_skb_d; 438 static int debug; 439 440 static DEFINE_MUTEX(pktgen_thread_lock); 441 static LIST_HEAD(pktgen_threads); 442 443 static struct notifier_block pktgen_notifier_block = { 444 .notifier_call = pktgen_device_event, 445 }; 446 447 /* 448 * /proc handling functions 449 * 450 */ 451 452 static int pgctrl_show(struct seq_file *seq, void *v) 453 { 454 seq_puts(seq, VERSION); 455 return 0; 456 } 457 458 static ssize_t pgctrl_write(struct file *file, const char __user * buf, 459 size_t count, loff_t * ppos) 460 { 461 int err = 0; 462 char data[128]; 463 464 if (!capable(CAP_NET_ADMIN)) { 465 err = -EPERM; 466 goto out; 467 } 468 469 if (count > sizeof(data)) 470 count = sizeof(data); 471 472 if (copy_from_user(data, buf, count)) { 473 err = -EFAULT; 474 goto out; 475 } 476 data[count - 1] = 0; /* Make string */ 477 478 if (!strcmp(data, "stop")) 479 pktgen_stop_all_threads_ifs(); 480 481 else if (!strcmp(data, "start")) 482 pktgen_run_all_threads(); 483 484 else if (!strcmp(data, "reset")) 485 pktgen_reset_all_threads(); 486 487 else 488 printk(KERN_WARNING "pktgen: Unknown command: %s\n", data); 489 490 err = count; 491 492 out: 493 return err; 494 } 495 496 static int pgctrl_open(struct inode *inode, struct file *file) 497 { 498 return single_open(file, pgctrl_show, PDE(inode)->data); 499 } 500 501 static const struct file_operations pktgen_fops = { 502 .owner = THIS_MODULE, 503 .open = pgctrl_open, 504 .read = seq_read, 505 .llseek = seq_lseek, 506 .write = pgctrl_write, 507 .release = single_release, 508 }; 509 510 static int pktgen_if_show(struct seq_file *seq, void *v) 511 { 512 struct pktgen_dev *pkt_dev = seq->private; 513 __u64 sa; 514 __u64 stopped; 515 __u64 now = getCurUs(); 516 517 seq_printf(seq, 518 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", 519 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, 520 pkt_dev->max_pkt_size); 521 522 seq_printf(seq, 523 " frags: %d delay: %u clone_skb: %d ifname: %s\n", 524 pkt_dev->nfrags, 525 1000 * pkt_dev->delay_us + pkt_dev->delay_ns, 526 pkt_dev->clone_skb, pkt_dev->odev->name); 527 528 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, 529 pkt_dev->lflow); 530 531 seq_printf(seq, 532 " queue_map_min: %u queue_map_max: %u\n", 533 pkt_dev->queue_map_min, 534 pkt_dev->queue_map_max); 535 536 if (pkt_dev->flags & F_IPV6) { 537 char b1[128], b2[128], b3[128]; 538 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr); 539 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr); 540 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr); 541 seq_printf(seq, 542 " saddr: %s min_saddr: %s max_saddr: %s\n", b1, 543 b2, b3); 544 545 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr); 546 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr); 547 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr); 548 seq_printf(seq, 549 " daddr: %s min_daddr: %s max_daddr: %s\n", b1, 550 b2, b3); 551 552 } else 553 seq_printf(seq, 554 " dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n", 555 pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min, 556 pkt_dev->src_max); 557 558 seq_puts(seq, " src_mac: "); 559 560 seq_printf(seq, "%pM ", 561 is_zero_ether_addr(pkt_dev->src_mac) ? 562 pkt_dev->odev->dev_addr : pkt_dev->src_mac); 563 564 seq_printf(seq, "dst_mac: "); 565 seq_printf(seq, "%pM\n", pkt_dev->dst_mac); 566 567 seq_printf(seq, 568 " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n", 569 pkt_dev->udp_src_min, pkt_dev->udp_src_max, 570 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); 571 572 seq_printf(seq, 573 " src_mac_count: %d dst_mac_count: %d\n", 574 pkt_dev->src_mac_count, pkt_dev->dst_mac_count); 575 576 if (pkt_dev->nr_labels) { 577 unsigned i; 578 seq_printf(seq, " mpls: "); 579 for (i = 0; i < pkt_dev->nr_labels; i++) 580 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), 581 i == pkt_dev->nr_labels-1 ? "\n" : ", "); 582 } 583 584 if (pkt_dev->vlan_id != 0xffff) { 585 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", 586 pkt_dev->vlan_id, pkt_dev->vlan_p, pkt_dev->vlan_cfi); 587 } 588 589 if (pkt_dev->svlan_id != 0xffff) { 590 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", 591 pkt_dev->svlan_id, pkt_dev->svlan_p, pkt_dev->svlan_cfi); 592 } 593 594 if (pkt_dev->tos) { 595 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); 596 } 597 598 if (pkt_dev->traffic_class) { 599 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); 600 } 601 602 seq_printf(seq, " Flags: "); 603 604 if (pkt_dev->flags & F_IPV6) 605 seq_printf(seq, "IPV6 "); 606 607 if (pkt_dev->flags & F_IPSRC_RND) 608 seq_printf(seq, "IPSRC_RND "); 609 610 if (pkt_dev->flags & F_IPDST_RND) 611 seq_printf(seq, "IPDST_RND "); 612 613 if (pkt_dev->flags & F_TXSIZE_RND) 614 seq_printf(seq, "TXSIZE_RND "); 615 616 if (pkt_dev->flags & F_UDPSRC_RND) 617 seq_printf(seq, "UDPSRC_RND "); 618 619 if (pkt_dev->flags & F_UDPDST_RND) 620 seq_printf(seq, "UDPDST_RND "); 621 622 if (pkt_dev->flags & F_MPLS_RND) 623 seq_printf(seq, "MPLS_RND "); 624 625 if (pkt_dev->flags & F_QUEUE_MAP_RND) 626 seq_printf(seq, "QUEUE_MAP_RND "); 627 628 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 629 seq_printf(seq, "QUEUE_MAP_CPU "); 630 631 if (pkt_dev->cflows) { 632 if (pkt_dev->flags & F_FLOW_SEQ) 633 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/ 634 else 635 seq_printf(seq, "FLOW_RND "); 636 } 637 638 #ifdef CONFIG_XFRM 639 if (pkt_dev->flags & F_IPSEC_ON) 640 seq_printf(seq, "IPSEC "); 641 #endif 642 643 if (pkt_dev->flags & F_MACSRC_RND) 644 seq_printf(seq, "MACSRC_RND "); 645 646 if (pkt_dev->flags & F_MACDST_RND) 647 seq_printf(seq, "MACDST_RND "); 648 649 if (pkt_dev->flags & F_VID_RND) 650 seq_printf(seq, "VID_RND "); 651 652 if (pkt_dev->flags & F_SVID_RND) 653 seq_printf(seq, "SVID_RND "); 654 655 seq_puts(seq, "\n"); 656 657 sa = pkt_dev->started_at; 658 stopped = pkt_dev->stopped_at; 659 if (pkt_dev->running) 660 stopped = now; /* not really stopped, more like last-running-at */ 661 662 seq_printf(seq, 663 "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n", 664 (unsigned long long)pkt_dev->sofar, 665 (unsigned long long)pkt_dev->errors, (unsigned long long)sa, 666 (unsigned long long)stopped, 667 (unsigned long long)pkt_dev->idle_acc); 668 669 seq_printf(seq, 670 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 671 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, 672 pkt_dev->cur_src_mac_offset); 673 674 if (pkt_dev->flags & F_IPV6) { 675 char b1[128], b2[128]; 676 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr); 677 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr); 678 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1); 679 } else 680 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n", 681 pkt_dev->cur_saddr, pkt_dev->cur_daddr); 682 683 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", 684 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 685 686 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); 687 688 seq_printf(seq, " flows: %u\n", pkt_dev->nflows); 689 690 if (pkt_dev->result[0]) 691 seq_printf(seq, "Result: %s\n", pkt_dev->result); 692 else 693 seq_printf(seq, "Result: Idle\n"); 694 695 return 0; 696 } 697 698 699 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, __u32 *num) 700 { 701 int i = 0; 702 *num = 0; 703 704 for (; i < maxlen; i++) { 705 char c; 706 *num <<= 4; 707 if (get_user(c, &user_buffer[i])) 708 return -EFAULT; 709 if ((c >= '0') && (c <= '9')) 710 *num |= c - '0'; 711 else if ((c >= 'a') && (c <= 'f')) 712 *num |= c - 'a' + 10; 713 else if ((c >= 'A') && (c <= 'F')) 714 *num |= c - 'A' + 10; 715 else 716 break; 717 } 718 return i; 719 } 720 721 static int count_trail_chars(const char __user * user_buffer, 722 unsigned int maxlen) 723 { 724 int i; 725 726 for (i = 0; i < maxlen; i++) { 727 char c; 728 if (get_user(c, &user_buffer[i])) 729 return -EFAULT; 730 switch (c) { 731 case '\"': 732 case '\n': 733 case '\r': 734 case '\t': 735 case ' ': 736 case '=': 737 break; 738 default: 739 goto done; 740 } 741 } 742 done: 743 return i; 744 } 745 746 static unsigned long num_arg(const char __user * user_buffer, 747 unsigned long maxlen, unsigned long *num) 748 { 749 int i = 0; 750 *num = 0; 751 752 for (; i < maxlen; i++) { 753 char c; 754 if (get_user(c, &user_buffer[i])) 755 return -EFAULT; 756 if ((c >= '0') && (c <= '9')) { 757 *num *= 10; 758 *num += c - '0'; 759 } else 760 break; 761 } 762 return i; 763 } 764 765 static int strn_len(const char __user * user_buffer, unsigned int maxlen) 766 { 767 int i = 0; 768 769 for (; i < maxlen; i++) { 770 char c; 771 if (get_user(c, &user_buffer[i])) 772 return -EFAULT; 773 switch (c) { 774 case '\"': 775 case '\n': 776 case '\r': 777 case '\t': 778 case ' ': 779 goto done_str; 780 break; 781 default: 782 break; 783 } 784 } 785 done_str: 786 return i; 787 } 788 789 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) 790 { 791 unsigned n = 0; 792 char c; 793 ssize_t i = 0; 794 int len; 795 796 pkt_dev->nr_labels = 0; 797 do { 798 __u32 tmp; 799 len = hex32_arg(&buffer[i], 8, &tmp); 800 if (len <= 0) 801 return len; 802 pkt_dev->labels[n] = htonl(tmp); 803 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 804 pkt_dev->flags |= F_MPLS_RND; 805 i += len; 806 if (get_user(c, &buffer[i])) 807 return -EFAULT; 808 i++; 809 n++; 810 if (n >= MAX_MPLS_LABELS) 811 return -E2BIG; 812 } while (c == ','); 813 814 pkt_dev->nr_labels = n; 815 return i; 816 } 817 818 static ssize_t pktgen_if_write(struct file *file, 819 const char __user * user_buffer, size_t count, 820 loff_t * offset) 821 { 822 struct seq_file *seq = (struct seq_file *)file->private_data; 823 struct pktgen_dev *pkt_dev = seq->private; 824 int i = 0, max, len; 825 char name[16], valstr[32]; 826 unsigned long value = 0; 827 char *pg_result = NULL; 828 int tmp = 0; 829 char buf[128]; 830 831 pg_result = &(pkt_dev->result[0]); 832 833 if (count < 1) { 834 printk(KERN_WARNING "pktgen: wrong command format\n"); 835 return -EINVAL; 836 } 837 838 max = count - i; 839 tmp = count_trail_chars(&user_buffer[i], max); 840 if (tmp < 0) { 841 printk(KERN_WARNING "pktgen: illegal format\n"); 842 return tmp; 843 } 844 i += tmp; 845 846 /* Read variable name */ 847 848 len = strn_len(&user_buffer[i], sizeof(name) - 1); 849 if (len < 0) { 850 return len; 851 } 852 memset(name, 0, sizeof(name)); 853 if (copy_from_user(name, &user_buffer[i], len)) 854 return -EFAULT; 855 i += len; 856 857 max = count - i; 858 len = count_trail_chars(&user_buffer[i], max); 859 if (len < 0) 860 return len; 861 862 i += len; 863 864 if (debug) { 865 char tb[count + 1]; 866 if (copy_from_user(tb, user_buffer, count)) 867 return -EFAULT; 868 tb[count] = 0; 869 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name, 870 (unsigned long)count, tb); 871 } 872 873 if (!strcmp(name, "min_pkt_size")) { 874 len = num_arg(&user_buffer[i], 10, &value); 875 if (len < 0) { 876 return len; 877 } 878 i += len; 879 if (value < 14 + 20 + 8) 880 value = 14 + 20 + 8; 881 if (value != pkt_dev->min_pkt_size) { 882 pkt_dev->min_pkt_size = value; 883 pkt_dev->cur_pkt_size = value; 884 } 885 sprintf(pg_result, "OK: min_pkt_size=%u", 886 pkt_dev->min_pkt_size); 887 return count; 888 } 889 890 if (!strcmp(name, "max_pkt_size")) { 891 len = num_arg(&user_buffer[i], 10, &value); 892 if (len < 0) { 893 return len; 894 } 895 i += len; 896 if (value < 14 + 20 + 8) 897 value = 14 + 20 + 8; 898 if (value != pkt_dev->max_pkt_size) { 899 pkt_dev->max_pkt_size = value; 900 pkt_dev->cur_pkt_size = value; 901 } 902 sprintf(pg_result, "OK: max_pkt_size=%u", 903 pkt_dev->max_pkt_size); 904 return count; 905 } 906 907 /* Shortcut for min = max */ 908 909 if (!strcmp(name, "pkt_size")) { 910 len = num_arg(&user_buffer[i], 10, &value); 911 if (len < 0) { 912 return len; 913 } 914 i += len; 915 if (value < 14 + 20 + 8) 916 value = 14 + 20 + 8; 917 if (value != pkt_dev->min_pkt_size) { 918 pkt_dev->min_pkt_size = value; 919 pkt_dev->max_pkt_size = value; 920 pkt_dev->cur_pkt_size = value; 921 } 922 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 923 return count; 924 } 925 926 if (!strcmp(name, "debug")) { 927 len = num_arg(&user_buffer[i], 10, &value); 928 if (len < 0) { 929 return len; 930 } 931 i += len; 932 debug = value; 933 sprintf(pg_result, "OK: debug=%u", debug); 934 return count; 935 } 936 937 if (!strcmp(name, "frags")) { 938 len = num_arg(&user_buffer[i], 10, &value); 939 if (len < 0) { 940 return len; 941 } 942 i += len; 943 pkt_dev->nfrags = value; 944 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 945 return count; 946 } 947 if (!strcmp(name, "delay")) { 948 len = num_arg(&user_buffer[i], 10, &value); 949 if (len < 0) { 950 return len; 951 } 952 i += len; 953 if (value == 0x7FFFFFFF) { 954 pkt_dev->delay_us = 0x7FFFFFFF; 955 pkt_dev->delay_ns = 0; 956 } else { 957 pkt_dev->delay_us = value / 1000; 958 pkt_dev->delay_ns = value % 1000; 959 } 960 sprintf(pg_result, "OK: delay=%u", 961 1000 * pkt_dev->delay_us + pkt_dev->delay_ns); 962 return count; 963 } 964 if (!strcmp(name, "udp_src_min")) { 965 len = num_arg(&user_buffer[i], 10, &value); 966 if (len < 0) { 967 return len; 968 } 969 i += len; 970 if (value != pkt_dev->udp_src_min) { 971 pkt_dev->udp_src_min = value; 972 pkt_dev->cur_udp_src = value; 973 } 974 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 975 return count; 976 } 977 if (!strcmp(name, "udp_dst_min")) { 978 len = num_arg(&user_buffer[i], 10, &value); 979 if (len < 0) { 980 return len; 981 } 982 i += len; 983 if (value != pkt_dev->udp_dst_min) { 984 pkt_dev->udp_dst_min = value; 985 pkt_dev->cur_udp_dst = value; 986 } 987 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 988 return count; 989 } 990 if (!strcmp(name, "udp_src_max")) { 991 len = num_arg(&user_buffer[i], 10, &value); 992 if (len < 0) { 993 return len; 994 } 995 i += len; 996 if (value != pkt_dev->udp_src_max) { 997 pkt_dev->udp_src_max = value; 998 pkt_dev->cur_udp_src = value; 999 } 1000 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 1001 return count; 1002 } 1003 if (!strcmp(name, "udp_dst_max")) { 1004 len = num_arg(&user_buffer[i], 10, &value); 1005 if (len < 0) { 1006 return len; 1007 } 1008 i += len; 1009 if (value != pkt_dev->udp_dst_max) { 1010 pkt_dev->udp_dst_max = value; 1011 pkt_dev->cur_udp_dst = value; 1012 } 1013 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1014 return count; 1015 } 1016 if (!strcmp(name, "clone_skb")) { 1017 len = num_arg(&user_buffer[i], 10, &value); 1018 if (len < 0) { 1019 return len; 1020 } 1021 i += len; 1022 pkt_dev->clone_skb = value; 1023 1024 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1025 return count; 1026 } 1027 if (!strcmp(name, "count")) { 1028 len = num_arg(&user_buffer[i], 10, &value); 1029 if (len < 0) { 1030 return len; 1031 } 1032 i += len; 1033 pkt_dev->count = value; 1034 sprintf(pg_result, "OK: count=%llu", 1035 (unsigned long long)pkt_dev->count); 1036 return count; 1037 } 1038 if (!strcmp(name, "src_mac_count")) { 1039 len = num_arg(&user_buffer[i], 10, &value); 1040 if (len < 0) { 1041 return len; 1042 } 1043 i += len; 1044 if (pkt_dev->src_mac_count != value) { 1045 pkt_dev->src_mac_count = value; 1046 pkt_dev->cur_src_mac_offset = 0; 1047 } 1048 sprintf(pg_result, "OK: src_mac_count=%d", 1049 pkt_dev->src_mac_count); 1050 return count; 1051 } 1052 if (!strcmp(name, "dst_mac_count")) { 1053 len = num_arg(&user_buffer[i], 10, &value); 1054 if (len < 0) { 1055 return len; 1056 } 1057 i += len; 1058 if (pkt_dev->dst_mac_count != value) { 1059 pkt_dev->dst_mac_count = value; 1060 pkt_dev->cur_dst_mac_offset = 0; 1061 } 1062 sprintf(pg_result, "OK: dst_mac_count=%d", 1063 pkt_dev->dst_mac_count); 1064 return count; 1065 } 1066 if (!strcmp(name, "flag")) { 1067 char f[32]; 1068 memset(f, 0, 32); 1069 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1070 if (len < 0) { 1071 return len; 1072 } 1073 if (copy_from_user(f, &user_buffer[i], len)) 1074 return -EFAULT; 1075 i += len; 1076 if (strcmp(f, "IPSRC_RND") == 0) 1077 pkt_dev->flags |= F_IPSRC_RND; 1078 1079 else if (strcmp(f, "!IPSRC_RND") == 0) 1080 pkt_dev->flags &= ~F_IPSRC_RND; 1081 1082 else if (strcmp(f, "TXSIZE_RND") == 0) 1083 pkt_dev->flags |= F_TXSIZE_RND; 1084 1085 else if (strcmp(f, "!TXSIZE_RND") == 0) 1086 pkt_dev->flags &= ~F_TXSIZE_RND; 1087 1088 else if (strcmp(f, "IPDST_RND") == 0) 1089 pkt_dev->flags |= F_IPDST_RND; 1090 1091 else if (strcmp(f, "!IPDST_RND") == 0) 1092 pkt_dev->flags &= ~F_IPDST_RND; 1093 1094 else if (strcmp(f, "UDPSRC_RND") == 0) 1095 pkt_dev->flags |= F_UDPSRC_RND; 1096 1097 else if (strcmp(f, "!UDPSRC_RND") == 0) 1098 pkt_dev->flags &= ~F_UDPSRC_RND; 1099 1100 else if (strcmp(f, "UDPDST_RND") == 0) 1101 pkt_dev->flags |= F_UDPDST_RND; 1102 1103 else if (strcmp(f, "!UDPDST_RND") == 0) 1104 pkt_dev->flags &= ~F_UDPDST_RND; 1105 1106 else if (strcmp(f, "MACSRC_RND") == 0) 1107 pkt_dev->flags |= F_MACSRC_RND; 1108 1109 else if (strcmp(f, "!MACSRC_RND") == 0) 1110 pkt_dev->flags &= ~F_MACSRC_RND; 1111 1112 else if (strcmp(f, "MACDST_RND") == 0) 1113 pkt_dev->flags |= F_MACDST_RND; 1114 1115 else if (strcmp(f, "!MACDST_RND") == 0) 1116 pkt_dev->flags &= ~F_MACDST_RND; 1117 1118 else if (strcmp(f, "MPLS_RND") == 0) 1119 pkt_dev->flags |= F_MPLS_RND; 1120 1121 else if (strcmp(f, "!MPLS_RND") == 0) 1122 pkt_dev->flags &= ~F_MPLS_RND; 1123 1124 else if (strcmp(f, "VID_RND") == 0) 1125 pkt_dev->flags |= F_VID_RND; 1126 1127 else if (strcmp(f, "!VID_RND") == 0) 1128 pkt_dev->flags &= ~F_VID_RND; 1129 1130 else if (strcmp(f, "SVID_RND") == 0) 1131 pkt_dev->flags |= F_SVID_RND; 1132 1133 else if (strcmp(f, "!SVID_RND") == 0) 1134 pkt_dev->flags &= ~F_SVID_RND; 1135 1136 else if (strcmp(f, "FLOW_SEQ") == 0) 1137 pkt_dev->flags |= F_FLOW_SEQ; 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_RND") == 0) 1143 pkt_dev->flags &= ~F_QUEUE_MAP_RND; 1144 1145 else if (strcmp(f, "QUEUE_MAP_CPU") == 0) 1146 pkt_dev->flags |= F_QUEUE_MAP_CPU; 1147 1148 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0) 1149 pkt_dev->flags &= ~F_QUEUE_MAP_CPU; 1150 #ifdef CONFIG_XFRM 1151 else if (strcmp(f, "IPSEC") == 0) 1152 pkt_dev->flags |= F_IPSEC_ON; 1153 #endif 1154 1155 else if (strcmp(f, "!IPV6") == 0) 1156 pkt_dev->flags &= ~F_IPV6; 1157 1158 else { 1159 sprintf(pg_result, 1160 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1161 f, 1162 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1163 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC\n"); 1164 return count; 1165 } 1166 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1167 return count; 1168 } 1169 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1170 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1171 if (len < 0) { 1172 return len; 1173 } 1174 1175 if (copy_from_user(buf, &user_buffer[i], len)) 1176 return -EFAULT; 1177 buf[len] = 0; 1178 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1179 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1180 strncpy(pkt_dev->dst_min, buf, len); 1181 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1182 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1183 } 1184 if (debug) 1185 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n", 1186 pkt_dev->dst_min); 1187 i += len; 1188 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1189 return count; 1190 } 1191 if (!strcmp(name, "dst_max")) { 1192 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1193 if (len < 0) { 1194 return len; 1195 } 1196 1197 if (copy_from_user(buf, &user_buffer[i], len)) 1198 return -EFAULT; 1199 1200 buf[len] = 0; 1201 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1202 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1203 strncpy(pkt_dev->dst_max, buf, len); 1204 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1205 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1206 } 1207 if (debug) 1208 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n", 1209 pkt_dev->dst_max); 1210 i += len; 1211 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1212 return count; 1213 } 1214 if (!strcmp(name, "dst6")) { 1215 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1216 if (len < 0) 1217 return len; 1218 1219 pkt_dev->flags |= F_IPV6; 1220 1221 if (copy_from_user(buf, &user_buffer[i], len)) 1222 return -EFAULT; 1223 buf[len] = 0; 1224 1225 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1226 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1227 1228 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr); 1229 1230 if (debug) 1231 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf); 1232 1233 i += len; 1234 sprintf(pg_result, "OK: dst6=%s", buf); 1235 return count; 1236 } 1237 if (!strcmp(name, "dst6_min")) { 1238 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1239 if (len < 0) 1240 return len; 1241 1242 pkt_dev->flags |= F_IPV6; 1243 1244 if (copy_from_user(buf, &user_buffer[i], len)) 1245 return -EFAULT; 1246 buf[len] = 0; 1247 1248 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1249 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1250 1251 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, 1252 &pkt_dev->min_in6_daddr); 1253 if (debug) 1254 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf); 1255 1256 i += len; 1257 sprintf(pg_result, "OK: dst6_min=%s", buf); 1258 return count; 1259 } 1260 if (!strcmp(name, "dst6_max")) { 1261 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1262 if (len < 0) 1263 return len; 1264 1265 pkt_dev->flags |= F_IPV6; 1266 1267 if (copy_from_user(buf, &user_buffer[i], len)) 1268 return -EFAULT; 1269 buf[len] = 0; 1270 1271 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1272 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1273 1274 if (debug) 1275 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf); 1276 1277 i += len; 1278 sprintf(pg_result, "OK: dst6_max=%s", buf); 1279 return count; 1280 } 1281 if (!strcmp(name, "src6")) { 1282 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1283 if (len < 0) 1284 return len; 1285 1286 pkt_dev->flags |= F_IPV6; 1287 1288 if (copy_from_user(buf, &user_buffer[i], len)) 1289 return -EFAULT; 1290 buf[len] = 0; 1291 1292 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1293 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1294 1295 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr); 1296 1297 if (debug) 1298 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf); 1299 1300 i += len; 1301 sprintf(pg_result, "OK: src6=%s", buf); 1302 return count; 1303 } 1304 if (!strcmp(name, "src_min")) { 1305 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1306 if (len < 0) { 1307 return len; 1308 } 1309 if (copy_from_user(buf, &user_buffer[i], len)) 1310 return -EFAULT; 1311 buf[len] = 0; 1312 if (strcmp(buf, pkt_dev->src_min) != 0) { 1313 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1314 strncpy(pkt_dev->src_min, buf, len); 1315 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1316 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1317 } 1318 if (debug) 1319 printk(KERN_DEBUG "pktgen: src_min set to: %s\n", 1320 pkt_dev->src_min); 1321 i += len; 1322 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1323 return count; 1324 } 1325 if (!strcmp(name, "src_max")) { 1326 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1327 if (len < 0) { 1328 return len; 1329 } 1330 if (copy_from_user(buf, &user_buffer[i], len)) 1331 return -EFAULT; 1332 buf[len] = 0; 1333 if (strcmp(buf, pkt_dev->src_max) != 0) { 1334 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1335 strncpy(pkt_dev->src_max, buf, len); 1336 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1337 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1338 } 1339 if (debug) 1340 printk(KERN_DEBUG "pktgen: src_max set to: %s\n", 1341 pkt_dev->src_max); 1342 i += len; 1343 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1344 return count; 1345 } 1346 if (!strcmp(name, "dst_mac")) { 1347 char *v = valstr; 1348 unsigned char old_dmac[ETH_ALEN]; 1349 unsigned char *m = pkt_dev->dst_mac; 1350 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN); 1351 1352 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1353 if (len < 0) { 1354 return len; 1355 } 1356 memset(valstr, 0, sizeof(valstr)); 1357 if (copy_from_user(valstr, &user_buffer[i], len)) 1358 return -EFAULT; 1359 i += len; 1360 1361 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) { 1362 if (*v >= '0' && *v <= '9') { 1363 *m *= 16; 1364 *m += *v - '0'; 1365 } 1366 if (*v >= 'A' && *v <= 'F') { 1367 *m *= 16; 1368 *m += *v - 'A' + 10; 1369 } 1370 if (*v >= 'a' && *v <= 'f') { 1371 *m *= 16; 1372 *m += *v - 'a' + 10; 1373 } 1374 if (*v == ':') { 1375 m++; 1376 *m = 0; 1377 } 1378 } 1379 1380 /* Set up Dest MAC */ 1381 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac)) 1382 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 1383 1384 sprintf(pg_result, "OK: dstmac"); 1385 return count; 1386 } 1387 if (!strcmp(name, "src_mac")) { 1388 char *v = valstr; 1389 unsigned char old_smac[ETH_ALEN]; 1390 unsigned char *m = pkt_dev->src_mac; 1391 1392 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN); 1393 1394 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1395 if (len < 0) { 1396 return len; 1397 } 1398 memset(valstr, 0, sizeof(valstr)); 1399 if (copy_from_user(valstr, &user_buffer[i], len)) 1400 return -EFAULT; 1401 i += len; 1402 1403 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) { 1404 if (*v >= '0' && *v <= '9') { 1405 *m *= 16; 1406 *m += *v - '0'; 1407 } 1408 if (*v >= 'A' && *v <= 'F') { 1409 *m *= 16; 1410 *m += *v - 'A' + 10; 1411 } 1412 if (*v >= 'a' && *v <= 'f') { 1413 *m *= 16; 1414 *m += *v - 'a' + 10; 1415 } 1416 if (*v == ':') { 1417 m++; 1418 *m = 0; 1419 } 1420 } 1421 1422 /* Set up Src MAC */ 1423 if (compare_ether_addr(old_smac, pkt_dev->src_mac)) 1424 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN); 1425 1426 sprintf(pg_result, "OK: srcmac"); 1427 return count; 1428 } 1429 1430 if (!strcmp(name, "clear_counters")) { 1431 pktgen_clear_counters(pkt_dev); 1432 sprintf(pg_result, "OK: Clearing counters.\n"); 1433 return count; 1434 } 1435 1436 if (!strcmp(name, "flows")) { 1437 len = num_arg(&user_buffer[i], 10, &value); 1438 if (len < 0) { 1439 return len; 1440 } 1441 i += len; 1442 if (value > MAX_CFLOWS) 1443 value = MAX_CFLOWS; 1444 1445 pkt_dev->cflows = value; 1446 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1447 return count; 1448 } 1449 1450 if (!strcmp(name, "flowlen")) { 1451 len = num_arg(&user_buffer[i], 10, &value); 1452 if (len < 0) { 1453 return len; 1454 } 1455 i += len; 1456 pkt_dev->lflow = value; 1457 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1458 return count; 1459 } 1460 1461 if (!strcmp(name, "queue_map_min")) { 1462 len = num_arg(&user_buffer[i], 5, &value); 1463 if (len < 0) { 1464 return len; 1465 } 1466 i += len; 1467 pkt_dev->queue_map_min = value; 1468 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1469 return count; 1470 } 1471 1472 if (!strcmp(name, "queue_map_max")) { 1473 len = num_arg(&user_buffer[i], 5, &value); 1474 if (len < 0) { 1475 return len; 1476 } 1477 i += len; 1478 pkt_dev->queue_map_max = value; 1479 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1480 return count; 1481 } 1482 1483 if (!strcmp(name, "mpls")) { 1484 unsigned n, cnt; 1485 1486 len = get_labels(&user_buffer[i], pkt_dev); 1487 if (len < 0) 1488 return len; 1489 i += len; 1490 cnt = sprintf(pg_result, "OK: mpls="); 1491 for (n = 0; n < pkt_dev->nr_labels; n++) 1492 cnt += sprintf(pg_result + cnt, 1493 "%08x%s", ntohl(pkt_dev->labels[n]), 1494 n == pkt_dev->nr_labels-1 ? "" : ","); 1495 1496 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1497 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1498 pkt_dev->svlan_id = 0xffff; 1499 1500 if (debug) 1501 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n"); 1502 } 1503 return count; 1504 } 1505 1506 if (!strcmp(name, "vlan_id")) { 1507 len = num_arg(&user_buffer[i], 4, &value); 1508 if (len < 0) { 1509 return len; 1510 } 1511 i += len; 1512 if (value <= 4095) { 1513 pkt_dev->vlan_id = value; /* turn on VLAN */ 1514 1515 if (debug) 1516 printk(KERN_DEBUG "pktgen: VLAN turned on\n"); 1517 1518 if (debug && pkt_dev->nr_labels) 1519 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1520 1521 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1522 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1523 } else { 1524 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1525 pkt_dev->svlan_id = 0xffff; 1526 1527 if (debug) 1528 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1529 } 1530 return count; 1531 } 1532 1533 if (!strcmp(name, "vlan_p")) { 1534 len = num_arg(&user_buffer[i], 1, &value); 1535 if (len < 0) { 1536 return len; 1537 } 1538 i += len; 1539 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1540 pkt_dev->vlan_p = value; 1541 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1542 } else { 1543 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1544 } 1545 return count; 1546 } 1547 1548 if (!strcmp(name, "vlan_cfi")) { 1549 len = num_arg(&user_buffer[i], 1, &value); 1550 if (len < 0) { 1551 return len; 1552 } 1553 i += len; 1554 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1555 pkt_dev->vlan_cfi = value; 1556 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1557 } else { 1558 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1559 } 1560 return count; 1561 } 1562 1563 if (!strcmp(name, "svlan_id")) { 1564 len = num_arg(&user_buffer[i], 4, &value); 1565 if (len < 0) { 1566 return len; 1567 } 1568 i += len; 1569 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1570 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1571 1572 if (debug) 1573 printk(KERN_DEBUG "pktgen: SVLAN turned on\n"); 1574 1575 if (debug && pkt_dev->nr_labels) 1576 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1577 1578 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1579 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1580 } else { 1581 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1582 pkt_dev->svlan_id = 0xffff; 1583 1584 if (debug) 1585 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1586 } 1587 return count; 1588 } 1589 1590 if (!strcmp(name, "svlan_p")) { 1591 len = num_arg(&user_buffer[i], 1, &value); 1592 if (len < 0) { 1593 return len; 1594 } 1595 i += len; 1596 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1597 pkt_dev->svlan_p = value; 1598 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1599 } else { 1600 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1601 } 1602 return count; 1603 } 1604 1605 if (!strcmp(name, "svlan_cfi")) { 1606 len = num_arg(&user_buffer[i], 1, &value); 1607 if (len < 0) { 1608 return len; 1609 } 1610 i += len; 1611 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1612 pkt_dev->svlan_cfi = value; 1613 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1614 } else { 1615 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1616 } 1617 return count; 1618 } 1619 1620 if (!strcmp(name, "tos")) { 1621 __u32 tmp_value = 0; 1622 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1623 if (len < 0) { 1624 return len; 1625 } 1626 i += len; 1627 if (len == 2) { 1628 pkt_dev->tos = tmp_value; 1629 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1630 } else { 1631 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1632 } 1633 return count; 1634 } 1635 1636 if (!strcmp(name, "traffic_class")) { 1637 __u32 tmp_value = 0; 1638 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1639 if (len < 0) { 1640 return len; 1641 } 1642 i += len; 1643 if (len == 2) { 1644 pkt_dev->traffic_class = tmp_value; 1645 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1646 } else { 1647 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1648 } 1649 return count; 1650 } 1651 1652 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1653 return -EINVAL; 1654 } 1655 1656 static int pktgen_if_open(struct inode *inode, struct file *file) 1657 { 1658 return single_open(file, pktgen_if_show, PDE(inode)->data); 1659 } 1660 1661 static const struct file_operations pktgen_if_fops = { 1662 .owner = THIS_MODULE, 1663 .open = pktgen_if_open, 1664 .read = seq_read, 1665 .llseek = seq_lseek, 1666 .write = pktgen_if_write, 1667 .release = single_release, 1668 }; 1669 1670 static int pktgen_thread_show(struct seq_file *seq, void *v) 1671 { 1672 struct pktgen_thread *t = seq->private; 1673 struct pktgen_dev *pkt_dev; 1674 1675 BUG_ON(!t); 1676 1677 seq_printf(seq, "Running: "); 1678 1679 if_lock(t); 1680 list_for_each_entry(pkt_dev, &t->if_list, list) 1681 if (pkt_dev->running) 1682 seq_printf(seq, "%s ", pkt_dev->odev->name); 1683 1684 seq_printf(seq, "\nStopped: "); 1685 1686 list_for_each_entry(pkt_dev, &t->if_list, list) 1687 if (!pkt_dev->running) 1688 seq_printf(seq, "%s ", pkt_dev->odev->name); 1689 1690 if (t->result[0]) 1691 seq_printf(seq, "\nResult: %s\n", t->result); 1692 else 1693 seq_printf(seq, "\nResult: NA\n"); 1694 1695 if_unlock(t); 1696 1697 return 0; 1698 } 1699 1700 static ssize_t pktgen_thread_write(struct file *file, 1701 const char __user * user_buffer, 1702 size_t count, loff_t * offset) 1703 { 1704 struct seq_file *seq = (struct seq_file *)file->private_data; 1705 struct pktgen_thread *t = seq->private; 1706 int i = 0, max, len, ret; 1707 char name[40]; 1708 char *pg_result; 1709 1710 if (count < 1) { 1711 // sprintf(pg_result, "Wrong command format"); 1712 return -EINVAL; 1713 } 1714 1715 max = count - i; 1716 len = count_trail_chars(&user_buffer[i], max); 1717 if (len < 0) 1718 return len; 1719 1720 i += len; 1721 1722 /* Read variable name */ 1723 1724 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1725 if (len < 0) 1726 return len; 1727 1728 memset(name, 0, sizeof(name)); 1729 if (copy_from_user(name, &user_buffer[i], len)) 1730 return -EFAULT; 1731 i += len; 1732 1733 max = count - i; 1734 len = count_trail_chars(&user_buffer[i], max); 1735 if (len < 0) 1736 return len; 1737 1738 i += len; 1739 1740 if (debug) 1741 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n", 1742 name, (unsigned long)count); 1743 1744 if (!t) { 1745 printk(KERN_ERR "pktgen: ERROR: No thread\n"); 1746 ret = -EINVAL; 1747 goto out; 1748 } 1749 1750 pg_result = &(t->result[0]); 1751 1752 if (!strcmp(name, "add_device")) { 1753 char f[32]; 1754 memset(f, 0, 32); 1755 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1756 if (len < 0) { 1757 ret = len; 1758 goto out; 1759 } 1760 if (copy_from_user(f, &user_buffer[i], len)) 1761 return -EFAULT; 1762 i += len; 1763 mutex_lock(&pktgen_thread_lock); 1764 pktgen_add_device(t, f); 1765 mutex_unlock(&pktgen_thread_lock); 1766 ret = count; 1767 sprintf(pg_result, "OK: add_device=%s", f); 1768 goto out; 1769 } 1770 1771 if (!strcmp(name, "rem_device_all")) { 1772 mutex_lock(&pktgen_thread_lock); 1773 t->control |= T_REMDEVALL; 1774 mutex_unlock(&pktgen_thread_lock); 1775 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1776 ret = count; 1777 sprintf(pg_result, "OK: rem_device_all"); 1778 goto out; 1779 } 1780 1781 if (!strcmp(name, "max_before_softirq")) { 1782 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1783 ret = count; 1784 goto out; 1785 } 1786 1787 ret = -EINVAL; 1788 out: 1789 return ret; 1790 } 1791 1792 static int pktgen_thread_open(struct inode *inode, struct file *file) 1793 { 1794 return single_open(file, pktgen_thread_show, PDE(inode)->data); 1795 } 1796 1797 static const struct file_operations pktgen_thread_fops = { 1798 .owner = THIS_MODULE, 1799 .open = pktgen_thread_open, 1800 .read = seq_read, 1801 .llseek = seq_lseek, 1802 .write = pktgen_thread_write, 1803 .release = single_release, 1804 }; 1805 1806 /* Think find or remove for NN */ 1807 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove) 1808 { 1809 struct pktgen_thread *t; 1810 struct pktgen_dev *pkt_dev = NULL; 1811 1812 list_for_each_entry(t, &pktgen_threads, th_list) { 1813 pkt_dev = pktgen_find_dev(t, ifname); 1814 if (pkt_dev) { 1815 if (remove) { 1816 if_lock(t); 1817 pkt_dev->removal_mark = 1; 1818 t->control |= T_REMDEV; 1819 if_unlock(t); 1820 } 1821 break; 1822 } 1823 } 1824 return pkt_dev; 1825 } 1826 1827 /* 1828 * mark a device for removal 1829 */ 1830 static void pktgen_mark_device(const char *ifname) 1831 { 1832 struct pktgen_dev *pkt_dev = NULL; 1833 const int max_tries = 10, msec_per_try = 125; 1834 int i = 0; 1835 1836 mutex_lock(&pktgen_thread_lock); 1837 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname); 1838 1839 while (1) { 1840 1841 pkt_dev = __pktgen_NN_threads(ifname, REMOVE); 1842 if (pkt_dev == NULL) 1843 break; /* success */ 1844 1845 mutex_unlock(&pktgen_thread_lock); 1846 pr_debug("pktgen: pktgen_mark_device waiting for %s " 1847 "to disappear....\n", ifname); 1848 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1849 mutex_lock(&pktgen_thread_lock); 1850 1851 if (++i >= max_tries) { 1852 printk(KERN_ERR "pktgen_mark_device: timed out after " 1853 "waiting %d msec for device %s to be removed\n", 1854 msec_per_try * i, ifname); 1855 break; 1856 } 1857 1858 } 1859 1860 mutex_unlock(&pktgen_thread_lock); 1861 } 1862 1863 static void pktgen_change_name(struct net_device *dev) 1864 { 1865 struct pktgen_thread *t; 1866 1867 list_for_each_entry(t, &pktgen_threads, th_list) { 1868 struct pktgen_dev *pkt_dev; 1869 1870 list_for_each_entry(pkt_dev, &t->if_list, list) { 1871 if (pkt_dev->odev != dev) 1872 continue; 1873 1874 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 1875 1876 pkt_dev->entry = create_proc_entry(dev->name, 0600, 1877 pg_proc_dir); 1878 if (!pkt_dev->entry) 1879 printk(KERN_ERR "pktgen: can't move proc " 1880 " entry for '%s'\n", dev->name); 1881 break; 1882 } 1883 } 1884 } 1885 1886 static int pktgen_device_event(struct notifier_block *unused, 1887 unsigned long event, void *ptr) 1888 { 1889 struct net_device *dev = ptr; 1890 1891 if (!net_eq(dev_net(dev), &init_net)) 1892 return NOTIFY_DONE; 1893 1894 /* It is OK that we do not hold the group lock right now, 1895 * as we run under the RTNL lock. 1896 */ 1897 1898 switch (event) { 1899 case NETDEV_CHANGENAME: 1900 pktgen_change_name(dev); 1901 break; 1902 1903 case NETDEV_UNREGISTER: 1904 pktgen_mark_device(dev->name); 1905 break; 1906 } 1907 1908 return NOTIFY_DONE; 1909 } 1910 1911 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev, const char *ifname) 1912 { 1913 char b[IFNAMSIZ+5]; 1914 int i = 0; 1915 1916 for(i=0; ifname[i] != '@'; i++) { 1917 if(i == IFNAMSIZ) 1918 break; 1919 1920 b[i] = ifname[i]; 1921 } 1922 b[i] = 0; 1923 1924 return dev_get_by_name(&init_net, b); 1925 } 1926 1927 1928 /* Associate pktgen_dev with a device. */ 1929 1930 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname) 1931 { 1932 struct net_device *odev; 1933 int err; 1934 1935 /* Clean old setups */ 1936 if (pkt_dev->odev) { 1937 dev_put(pkt_dev->odev); 1938 pkt_dev->odev = NULL; 1939 } 1940 1941 odev = pktgen_dev_get_by_name(pkt_dev, ifname); 1942 if (!odev) { 1943 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname); 1944 return -ENODEV; 1945 } 1946 1947 if (odev->type != ARPHRD_ETHER) { 1948 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname); 1949 err = -EINVAL; 1950 } else if (!netif_running(odev)) { 1951 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname); 1952 err = -ENETDOWN; 1953 } else { 1954 pkt_dev->odev = odev; 1955 return 0; 1956 } 1957 1958 dev_put(odev); 1959 return err; 1960 } 1961 1962 /* Read pkt_dev from the interface and set up internal pktgen_dev 1963 * structure to have the right information to create/send packets 1964 */ 1965 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 1966 { 1967 int ntxq; 1968 1969 if (!pkt_dev->odev) { 1970 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in " 1971 "setup_inject.\n"); 1972 sprintf(pkt_dev->result, 1973 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 1974 return; 1975 } 1976 1977 /* make sure that we don't pick a non-existing transmit queue */ 1978 ntxq = pkt_dev->odev->real_num_tx_queues; 1979 1980 if (ntxq <= pkt_dev->queue_map_min) { 1981 printk(KERN_WARNING "pktgen: WARNING: Requested " 1982 "queue_map_min (zero-based) (%d) exceeds valid range " 1983 "[0 - %d] for (%d) queues on %s, resetting\n", 1984 pkt_dev->queue_map_min, (ntxq ?: 1)- 1, ntxq, 1985 pkt_dev->odev->name); 1986 pkt_dev->queue_map_min = ntxq - 1; 1987 } 1988 if (pkt_dev->queue_map_max >= ntxq) { 1989 printk(KERN_WARNING "pktgen: WARNING: Requested " 1990 "queue_map_max (zero-based) (%d) exceeds valid range " 1991 "[0 - %d] for (%d) queues on %s, resetting\n", 1992 pkt_dev->queue_map_max, (ntxq ?: 1)- 1, ntxq, 1993 pkt_dev->odev->name); 1994 pkt_dev->queue_map_max = ntxq - 1; 1995 } 1996 1997 /* Default to the interface's mac if not explicitly set. */ 1998 1999 if (is_zero_ether_addr(pkt_dev->src_mac)) 2000 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN); 2001 2002 /* Set up Dest MAC */ 2003 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 2004 2005 /* Set up pkt size */ 2006 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2007 2008 if (pkt_dev->flags & F_IPV6) { 2009 /* 2010 * Skip this automatic address setting until locks or functions 2011 * gets exported 2012 */ 2013 2014 #ifdef NOTNOW 2015 int i, set = 0, err = 1; 2016 struct inet6_dev *idev; 2017 2018 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2019 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2020 set = 1; 2021 break; 2022 } 2023 2024 if (!set) { 2025 2026 /* 2027 * Use linklevel address if unconfigured. 2028 * 2029 * use ipv6_get_lladdr if/when it's get exported 2030 */ 2031 2032 rcu_read_lock(); 2033 if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) { 2034 struct inet6_ifaddr *ifp; 2035 2036 read_lock_bh(&idev->lock); 2037 for (ifp = idev->addr_list; ifp; 2038 ifp = ifp->if_next) { 2039 if (ifp->scope == IFA_LINK 2040 && !(ifp-> 2041 flags & IFA_F_TENTATIVE)) { 2042 ipv6_addr_copy(&pkt_dev-> 2043 cur_in6_saddr, 2044 &ifp->addr); 2045 err = 0; 2046 break; 2047 } 2048 } 2049 read_unlock_bh(&idev->lock); 2050 } 2051 rcu_read_unlock(); 2052 if (err) 2053 printk(KERN_ERR "pktgen: ERROR: IPv6 link " 2054 "address not availble.\n"); 2055 } 2056 #endif 2057 } else { 2058 pkt_dev->saddr_min = 0; 2059 pkt_dev->saddr_max = 0; 2060 if (strlen(pkt_dev->src_min) == 0) { 2061 2062 struct in_device *in_dev; 2063 2064 rcu_read_lock(); 2065 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2066 if (in_dev) { 2067 if (in_dev->ifa_list) { 2068 pkt_dev->saddr_min = 2069 in_dev->ifa_list->ifa_address; 2070 pkt_dev->saddr_max = pkt_dev->saddr_min; 2071 } 2072 } 2073 rcu_read_unlock(); 2074 } else { 2075 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2076 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2077 } 2078 2079 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2080 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2081 } 2082 /* Initialize current values. */ 2083 pkt_dev->cur_dst_mac_offset = 0; 2084 pkt_dev->cur_src_mac_offset = 0; 2085 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2086 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2087 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2088 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2089 pkt_dev->nflows = 0; 2090 } 2091 2092 static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us) 2093 { 2094 __u64 start; 2095 __u64 now; 2096 2097 start = now = getCurUs(); 2098 while (now < spin_until_us) { 2099 /* TODO: optimize sleeping behavior */ 2100 if (spin_until_us - now > jiffies_to_usecs(1) + 1) 2101 schedule_timeout_interruptible(1); 2102 else if (spin_until_us - now > 100) { 2103 if (!pkt_dev->running) 2104 return; 2105 if (need_resched()) 2106 schedule(); 2107 } 2108 2109 now = getCurUs(); 2110 } 2111 2112 pkt_dev->idle_acc += now - start; 2113 } 2114 2115 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2116 { 2117 pkt_dev->pkt_overhead = 0; 2118 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2119 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2120 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2121 } 2122 2123 static inline int f_seen(struct pktgen_dev *pkt_dev, int flow) 2124 { 2125 2126 if (pkt_dev->flows[flow].flags & F_INIT) 2127 return 1; 2128 else 2129 return 0; 2130 } 2131 2132 static inline int f_pick(struct pktgen_dev *pkt_dev) 2133 { 2134 int flow = pkt_dev->curfl; 2135 2136 if (pkt_dev->flags & F_FLOW_SEQ) { 2137 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2138 /* reset time */ 2139 pkt_dev->flows[flow].count = 0; 2140 pkt_dev->flows[flow].flags = 0; 2141 pkt_dev->curfl += 1; 2142 if (pkt_dev->curfl >= pkt_dev->cflows) 2143 pkt_dev->curfl = 0; /*reset */ 2144 } 2145 } else { 2146 flow = random32() % pkt_dev->cflows; 2147 pkt_dev->curfl = flow; 2148 2149 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2150 pkt_dev->flows[flow].count = 0; 2151 pkt_dev->flows[flow].flags = 0; 2152 } 2153 } 2154 2155 return pkt_dev->curfl; 2156 } 2157 2158 2159 #ifdef CONFIG_XFRM 2160 /* If there was already an IPSEC SA, we keep it as is, else 2161 * we go look for it ... 2162 */ 2163 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2164 { 2165 struct xfrm_state *x = pkt_dev->flows[flow].x; 2166 if (!x) { 2167 /*slow path: we dont already have xfrm_state*/ 2168 x = xfrm_stateonly_find(&init_net, 2169 (xfrm_address_t *)&pkt_dev->cur_daddr, 2170 (xfrm_address_t *)&pkt_dev->cur_saddr, 2171 AF_INET, 2172 pkt_dev->ipsmode, 2173 pkt_dev->ipsproto, 0); 2174 if (x) { 2175 pkt_dev->flows[flow].x = x; 2176 set_pkt_overhead(pkt_dev); 2177 pkt_dev->pkt_overhead+=x->props.header_len; 2178 } 2179 2180 } 2181 } 2182 #endif 2183 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2184 { 2185 2186 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2187 pkt_dev->cur_queue_map = smp_processor_id(); 2188 2189 else if (pkt_dev->queue_map_min < pkt_dev->queue_map_max) { 2190 __u16 t; 2191 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2192 t = random32() % 2193 (pkt_dev->queue_map_max - 2194 pkt_dev->queue_map_min + 1) 2195 + pkt_dev->queue_map_min; 2196 } else { 2197 t = pkt_dev->cur_queue_map + 1; 2198 if (t > pkt_dev->queue_map_max) 2199 t = pkt_dev->queue_map_min; 2200 } 2201 pkt_dev->cur_queue_map = t; 2202 } 2203 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2204 } 2205 2206 /* Increment/randomize headers according to flags and current values 2207 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2208 */ 2209 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2210 { 2211 __u32 imn; 2212 __u32 imx; 2213 int flow = 0; 2214 2215 if (pkt_dev->cflows) 2216 flow = f_pick(pkt_dev); 2217 2218 /* Deal with source MAC */ 2219 if (pkt_dev->src_mac_count > 1) { 2220 __u32 mc; 2221 __u32 tmp; 2222 2223 if (pkt_dev->flags & F_MACSRC_RND) 2224 mc = random32() % pkt_dev->src_mac_count; 2225 else { 2226 mc = pkt_dev->cur_src_mac_offset++; 2227 if (pkt_dev->cur_src_mac_offset >= 2228 pkt_dev->src_mac_count) 2229 pkt_dev->cur_src_mac_offset = 0; 2230 } 2231 2232 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2233 pkt_dev->hh[11] = tmp; 2234 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2235 pkt_dev->hh[10] = tmp; 2236 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2237 pkt_dev->hh[9] = tmp; 2238 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2239 pkt_dev->hh[8] = tmp; 2240 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2241 pkt_dev->hh[7] = tmp; 2242 } 2243 2244 /* Deal with Destination MAC */ 2245 if (pkt_dev->dst_mac_count > 1) { 2246 __u32 mc; 2247 __u32 tmp; 2248 2249 if (pkt_dev->flags & F_MACDST_RND) 2250 mc = random32() % pkt_dev->dst_mac_count; 2251 2252 else { 2253 mc = pkt_dev->cur_dst_mac_offset++; 2254 if (pkt_dev->cur_dst_mac_offset >= 2255 pkt_dev->dst_mac_count) { 2256 pkt_dev->cur_dst_mac_offset = 0; 2257 } 2258 } 2259 2260 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2261 pkt_dev->hh[5] = tmp; 2262 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2263 pkt_dev->hh[4] = tmp; 2264 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2265 pkt_dev->hh[3] = tmp; 2266 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2267 pkt_dev->hh[2] = tmp; 2268 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2269 pkt_dev->hh[1] = tmp; 2270 } 2271 2272 if (pkt_dev->flags & F_MPLS_RND) { 2273 unsigned i; 2274 for (i = 0; i < pkt_dev->nr_labels; i++) 2275 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2276 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2277 ((__force __be32)random32() & 2278 htonl(0x000fffff)); 2279 } 2280 2281 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2282 pkt_dev->vlan_id = random32() & (4096-1); 2283 } 2284 2285 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2286 pkt_dev->svlan_id = random32() & (4096 - 1); 2287 } 2288 2289 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2290 if (pkt_dev->flags & F_UDPSRC_RND) 2291 pkt_dev->cur_udp_src = random32() % 2292 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2293 + pkt_dev->udp_src_min; 2294 2295 else { 2296 pkt_dev->cur_udp_src++; 2297 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2298 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2299 } 2300 } 2301 2302 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2303 if (pkt_dev->flags & F_UDPDST_RND) { 2304 pkt_dev->cur_udp_dst = random32() % 2305 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2306 + pkt_dev->udp_dst_min; 2307 } else { 2308 pkt_dev->cur_udp_dst++; 2309 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2310 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2311 } 2312 } 2313 2314 if (!(pkt_dev->flags & F_IPV6)) { 2315 2316 if ((imn = ntohl(pkt_dev->saddr_min)) < (imx = 2317 ntohl(pkt_dev-> 2318 saddr_max))) { 2319 __u32 t; 2320 if (pkt_dev->flags & F_IPSRC_RND) 2321 t = random32() % (imx - imn) + imn; 2322 else { 2323 t = ntohl(pkt_dev->cur_saddr); 2324 t++; 2325 if (t > imx) { 2326 t = imn; 2327 } 2328 } 2329 pkt_dev->cur_saddr = htonl(t); 2330 } 2331 2332 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2333 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2334 } else { 2335 imn = ntohl(pkt_dev->daddr_min); 2336 imx = ntohl(pkt_dev->daddr_max); 2337 if (imn < imx) { 2338 __u32 t; 2339 __be32 s; 2340 if (pkt_dev->flags & F_IPDST_RND) { 2341 2342 t = random32() % (imx - imn) + imn; 2343 s = htonl(t); 2344 2345 while (ipv4_is_loopback(s) || 2346 ipv4_is_multicast(s) || 2347 ipv4_is_lbcast(s) || 2348 ipv4_is_zeronet(s) || 2349 ipv4_is_local_multicast(s)) { 2350 t = random32() % (imx - imn) + imn; 2351 s = htonl(t); 2352 } 2353 pkt_dev->cur_daddr = s; 2354 } else { 2355 t = ntohl(pkt_dev->cur_daddr); 2356 t++; 2357 if (t > imx) { 2358 t = imn; 2359 } 2360 pkt_dev->cur_daddr = htonl(t); 2361 } 2362 } 2363 if (pkt_dev->cflows) { 2364 pkt_dev->flows[flow].flags |= F_INIT; 2365 pkt_dev->flows[flow].cur_daddr = 2366 pkt_dev->cur_daddr; 2367 #ifdef CONFIG_XFRM 2368 if (pkt_dev->flags & F_IPSEC_ON) 2369 get_ipsec_sa(pkt_dev, flow); 2370 #endif 2371 pkt_dev->nflows++; 2372 } 2373 } 2374 } else { /* IPV6 * */ 2375 2376 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 && 2377 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 && 2378 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 && 2379 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ; 2380 else { 2381 int i; 2382 2383 /* Only random destinations yet */ 2384 2385 for (i = 0; i < 4; i++) { 2386 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2387 (((__force __be32)random32() | 2388 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2389 pkt_dev->max_in6_daddr.s6_addr32[i]); 2390 } 2391 } 2392 } 2393 2394 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2395 __u32 t; 2396 if (pkt_dev->flags & F_TXSIZE_RND) { 2397 t = random32() % 2398 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2399 + pkt_dev->min_pkt_size; 2400 } else { 2401 t = pkt_dev->cur_pkt_size + 1; 2402 if (t > pkt_dev->max_pkt_size) 2403 t = pkt_dev->min_pkt_size; 2404 } 2405 pkt_dev->cur_pkt_size = t; 2406 } 2407 2408 set_cur_queue_map(pkt_dev); 2409 2410 pkt_dev->flows[flow].count++; 2411 } 2412 2413 2414 #ifdef CONFIG_XFRM 2415 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2416 { 2417 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2418 int err = 0; 2419 struct iphdr *iph; 2420 2421 if (!x) 2422 return 0; 2423 /* XXX: we dont support tunnel mode for now until 2424 * we resolve the dst issue */ 2425 if (x->props.mode != XFRM_MODE_TRANSPORT) 2426 return 0; 2427 2428 spin_lock(&x->lock); 2429 iph = ip_hdr(skb); 2430 2431 err = x->outer_mode->output(x, skb); 2432 if (err) 2433 goto error; 2434 err = x->type->output(x, skb); 2435 if (err) 2436 goto error; 2437 2438 x->curlft.bytes +=skb->len; 2439 x->curlft.packets++; 2440 error: 2441 spin_unlock(&x->lock); 2442 return err; 2443 } 2444 2445 static inline void free_SAs(struct pktgen_dev *pkt_dev) 2446 { 2447 if (pkt_dev->cflows) { 2448 /* let go of the SAs if we have them */ 2449 int i = 0; 2450 for (; i < pkt_dev->nflows; i++){ 2451 struct xfrm_state *x = pkt_dev->flows[i].x; 2452 if (x) { 2453 xfrm_state_put(x); 2454 pkt_dev->flows[i].x = NULL; 2455 } 2456 } 2457 } 2458 } 2459 2460 static inline int process_ipsec(struct pktgen_dev *pkt_dev, 2461 struct sk_buff *skb, __be16 protocol) 2462 { 2463 if (pkt_dev->flags & F_IPSEC_ON) { 2464 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2465 int nhead = 0; 2466 if (x) { 2467 int ret; 2468 __u8 *eth; 2469 nhead = x->props.header_len - skb_headroom(skb); 2470 if (nhead >0) { 2471 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2472 if (ret < 0) { 2473 printk(KERN_ERR "Error expanding " 2474 "ipsec packet %d\n",ret); 2475 goto err; 2476 } 2477 } 2478 2479 /* ipsec is not expecting ll header */ 2480 skb_pull(skb, ETH_HLEN); 2481 ret = pktgen_output_ipsec(skb, pkt_dev); 2482 if (ret) { 2483 printk(KERN_ERR "Error creating ipsec " 2484 "packet %d\n",ret); 2485 goto err; 2486 } 2487 /* restore ll */ 2488 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2489 memcpy(eth, pkt_dev->hh, 12); 2490 *(u16 *) & eth[12] = protocol; 2491 } 2492 } 2493 return 1; 2494 err: 2495 kfree_skb(skb); 2496 return 0; 2497 } 2498 #endif 2499 2500 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2501 { 2502 unsigned i; 2503 for (i = 0; i < pkt_dev->nr_labels; i++) { 2504 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2505 } 2506 mpls--; 2507 *mpls |= MPLS_STACK_BOTTOM; 2508 } 2509 2510 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2511 unsigned int prio) 2512 { 2513 return htons(id | (cfi << 12) | (prio << 13)); 2514 } 2515 2516 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2517 struct pktgen_dev *pkt_dev) 2518 { 2519 struct sk_buff *skb = NULL; 2520 __u8 *eth; 2521 struct udphdr *udph; 2522 int datalen, iplen; 2523 struct iphdr *iph; 2524 struct pktgen_hdr *pgh = NULL; 2525 __be16 protocol = htons(ETH_P_IP); 2526 __be32 *mpls; 2527 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2528 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2529 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2530 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2531 u16 queue_map; 2532 2533 if (pkt_dev->nr_labels) 2534 protocol = htons(ETH_P_MPLS_UC); 2535 2536 if (pkt_dev->vlan_id != 0xffff) 2537 protocol = htons(ETH_P_8021Q); 2538 2539 /* Update any of the values, used when we're incrementing various 2540 * fields. 2541 */ 2542 queue_map = pkt_dev->cur_queue_map; 2543 mod_cur_headers(pkt_dev); 2544 2545 datalen = (odev->hard_header_len + 16) & ~0xf; 2546 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + datalen + 2547 pkt_dev->pkt_overhead, GFP_ATOMIC); 2548 if (!skb) { 2549 sprintf(pkt_dev->result, "No memory"); 2550 return NULL; 2551 } 2552 2553 skb_reserve(skb, datalen); 2554 2555 /* Reserve for ethernet and IP header */ 2556 eth = (__u8 *) skb_push(skb, 14); 2557 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2558 if (pkt_dev->nr_labels) 2559 mpls_push(mpls, pkt_dev); 2560 2561 if (pkt_dev->vlan_id != 0xffff) { 2562 if (pkt_dev->svlan_id != 0xffff) { 2563 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2564 *svlan_tci = build_tci(pkt_dev->svlan_id, 2565 pkt_dev->svlan_cfi, 2566 pkt_dev->svlan_p); 2567 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2568 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2569 } 2570 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2571 *vlan_tci = build_tci(pkt_dev->vlan_id, 2572 pkt_dev->vlan_cfi, 2573 pkt_dev->vlan_p); 2574 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2575 *vlan_encapsulated_proto = htons(ETH_P_IP); 2576 } 2577 2578 skb->network_header = skb->tail; 2579 skb->transport_header = skb->network_header + sizeof(struct iphdr); 2580 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr)); 2581 skb_set_queue_mapping(skb, queue_map); 2582 iph = ip_hdr(skb); 2583 udph = udp_hdr(skb); 2584 2585 memcpy(eth, pkt_dev->hh, 12); 2586 *(__be16 *) & eth[12] = protocol; 2587 2588 /* Eth + IPh + UDPh + mpls */ 2589 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2590 pkt_dev->pkt_overhead; 2591 if (datalen < sizeof(struct pktgen_hdr)) 2592 datalen = sizeof(struct pktgen_hdr); 2593 2594 udph->source = htons(pkt_dev->cur_udp_src); 2595 udph->dest = htons(pkt_dev->cur_udp_dst); 2596 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2597 udph->check = 0; /* No checksum */ 2598 2599 iph->ihl = 5; 2600 iph->version = 4; 2601 iph->ttl = 32; 2602 iph->tos = pkt_dev->tos; 2603 iph->protocol = IPPROTO_UDP; /* UDP */ 2604 iph->saddr = pkt_dev->cur_saddr; 2605 iph->daddr = pkt_dev->cur_daddr; 2606 iph->frag_off = 0; 2607 iplen = 20 + 8 + datalen; 2608 iph->tot_len = htons(iplen); 2609 iph->check = 0; 2610 iph->check = ip_fast_csum((void *)iph, iph->ihl); 2611 skb->protocol = protocol; 2612 skb->mac_header = (skb->network_header - ETH_HLEN - 2613 pkt_dev->pkt_overhead); 2614 skb->dev = odev; 2615 skb->pkt_type = PACKET_HOST; 2616 2617 if (pkt_dev->nfrags <= 0) 2618 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 2619 else { 2620 int frags = pkt_dev->nfrags; 2621 int i; 2622 2623 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 2624 2625 if (frags > MAX_SKB_FRAGS) 2626 frags = MAX_SKB_FRAGS; 2627 if (datalen > frags * PAGE_SIZE) { 2628 skb_put(skb, datalen - frags * PAGE_SIZE); 2629 datalen = frags * PAGE_SIZE; 2630 } 2631 2632 i = 0; 2633 while (datalen > 0) { 2634 struct page *page = alloc_pages(GFP_KERNEL, 0); 2635 skb_shinfo(skb)->frags[i].page = page; 2636 skb_shinfo(skb)->frags[i].page_offset = 0; 2637 skb_shinfo(skb)->frags[i].size = 2638 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 2639 datalen -= skb_shinfo(skb)->frags[i].size; 2640 skb->len += skb_shinfo(skb)->frags[i].size; 2641 skb->data_len += skb_shinfo(skb)->frags[i].size; 2642 i++; 2643 skb_shinfo(skb)->nr_frags = i; 2644 } 2645 2646 while (i < frags) { 2647 int rem; 2648 2649 if (i == 0) 2650 break; 2651 2652 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 2653 if (rem == 0) 2654 break; 2655 2656 skb_shinfo(skb)->frags[i - 1].size -= rem; 2657 2658 skb_shinfo(skb)->frags[i] = 2659 skb_shinfo(skb)->frags[i - 1]; 2660 get_page(skb_shinfo(skb)->frags[i].page); 2661 skb_shinfo(skb)->frags[i].page = 2662 skb_shinfo(skb)->frags[i - 1].page; 2663 skb_shinfo(skb)->frags[i].page_offset += 2664 skb_shinfo(skb)->frags[i - 1].size; 2665 skb_shinfo(skb)->frags[i].size = rem; 2666 i++; 2667 skb_shinfo(skb)->nr_frags = i; 2668 } 2669 } 2670 2671 /* Stamp the time, and sequence number, convert them to network byte order */ 2672 2673 if (pgh) { 2674 struct timeval timestamp; 2675 2676 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2677 pgh->seq_num = htonl(pkt_dev->seq_num); 2678 2679 do_gettimeofday(×tamp); 2680 pgh->tv_sec = htonl(timestamp.tv_sec); 2681 pgh->tv_usec = htonl(timestamp.tv_usec); 2682 } 2683 2684 #ifdef CONFIG_XFRM 2685 if (!process_ipsec(pkt_dev, skb, protocol)) 2686 return NULL; 2687 #endif 2688 2689 return skb; 2690 } 2691 2692 /* 2693 * scan_ip6, fmt_ip taken from dietlibc-0.21 2694 * Author Felix von Leitner <felix-dietlibc@fefe.de> 2695 * 2696 * Slightly modified for kernel. 2697 * Should be candidate for net/ipv4/utils.c 2698 * --ro 2699 */ 2700 2701 static unsigned int scan_ip6(const char *s, char ip[16]) 2702 { 2703 unsigned int i; 2704 unsigned int len = 0; 2705 unsigned long u; 2706 char suffix[16]; 2707 unsigned int prefixlen = 0; 2708 unsigned int suffixlen = 0; 2709 __be32 tmp; 2710 char *pos; 2711 2712 for (i = 0; i < 16; i++) 2713 ip[i] = 0; 2714 2715 for (;;) { 2716 if (*s == ':') { 2717 len++; 2718 if (s[1] == ':') { /* Found "::", skip to part 2 */ 2719 s += 2; 2720 len++; 2721 break; 2722 } 2723 s++; 2724 } 2725 2726 u = simple_strtoul(s, &pos, 16); 2727 i = pos - s; 2728 if (!i) 2729 return 0; 2730 if (prefixlen == 12 && s[i] == '.') { 2731 2732 /* the last 4 bytes may be written as IPv4 address */ 2733 2734 tmp = in_aton(s); 2735 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp)); 2736 return i + len; 2737 } 2738 ip[prefixlen++] = (u >> 8); 2739 ip[prefixlen++] = (u & 255); 2740 s += i; 2741 len += i; 2742 if (prefixlen == 16) 2743 return len; 2744 } 2745 2746 /* part 2, after "::" */ 2747 for (;;) { 2748 if (*s == ':') { 2749 if (suffixlen == 0) 2750 break; 2751 s++; 2752 len++; 2753 } else if (suffixlen != 0) 2754 break; 2755 2756 u = simple_strtol(s, &pos, 16); 2757 i = pos - s; 2758 if (!i) { 2759 if (*s) 2760 len--; 2761 break; 2762 } 2763 if (suffixlen + prefixlen <= 12 && s[i] == '.') { 2764 tmp = in_aton(s); 2765 memcpy((struct in_addr *)(suffix + suffixlen), &tmp, 2766 sizeof(tmp)); 2767 suffixlen += 4; 2768 len += strlen(s); 2769 break; 2770 } 2771 suffix[suffixlen++] = (u >> 8); 2772 suffix[suffixlen++] = (u & 255); 2773 s += i; 2774 len += i; 2775 if (prefixlen + suffixlen == 16) 2776 break; 2777 } 2778 for (i = 0; i < suffixlen; i++) 2779 ip[16 - suffixlen + i] = suffix[i]; 2780 return len; 2781 } 2782 2783 static char tohex(char hexdigit) 2784 { 2785 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0'; 2786 } 2787 2788 static int fmt_xlong(char *s, unsigned int i) 2789 { 2790 char *bak = s; 2791 *s = tohex((i >> 12) & 0xf); 2792 if (s != bak || *s != '0') 2793 ++s; 2794 *s = tohex((i >> 8) & 0xf); 2795 if (s != bak || *s != '0') 2796 ++s; 2797 *s = tohex((i >> 4) & 0xf); 2798 if (s != bak || *s != '0') 2799 ++s; 2800 *s = tohex(i & 0xf); 2801 return s - bak + 1; 2802 } 2803 2804 static unsigned int fmt_ip6(char *s, const char ip[16]) 2805 { 2806 unsigned int len; 2807 unsigned int i; 2808 unsigned int temp; 2809 unsigned int compressing; 2810 int j; 2811 2812 len = 0; 2813 compressing = 0; 2814 for (j = 0; j < 16; j += 2) { 2815 2816 #ifdef V4MAPPEDPREFIX 2817 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) { 2818 inet_ntoa_r(*(struct in_addr *)(ip + 12), s); 2819 temp = strlen(s); 2820 return len + temp; 2821 } 2822 #endif 2823 temp = ((unsigned long)(unsigned char)ip[j] << 8) + 2824 (unsigned long)(unsigned char)ip[j + 1]; 2825 if (temp == 0) { 2826 if (!compressing) { 2827 compressing = 1; 2828 if (j == 0) { 2829 *s++ = ':'; 2830 ++len; 2831 } 2832 } 2833 } else { 2834 if (compressing) { 2835 compressing = 0; 2836 *s++ = ':'; 2837 ++len; 2838 } 2839 i = fmt_xlong(s, temp); 2840 len += i; 2841 s += i; 2842 if (j < 14) { 2843 *s++ = ':'; 2844 ++len; 2845 } 2846 } 2847 } 2848 if (compressing) { 2849 *s++ = ':'; 2850 ++len; 2851 } 2852 *s = 0; 2853 return len; 2854 } 2855 2856 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2857 struct pktgen_dev *pkt_dev) 2858 { 2859 struct sk_buff *skb = NULL; 2860 __u8 *eth; 2861 struct udphdr *udph; 2862 int datalen; 2863 struct ipv6hdr *iph; 2864 struct pktgen_hdr *pgh = NULL; 2865 __be16 protocol = htons(ETH_P_IPV6); 2866 __be32 *mpls; 2867 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2868 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2869 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2870 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2871 u16 queue_map; 2872 2873 if (pkt_dev->nr_labels) 2874 protocol = htons(ETH_P_MPLS_UC); 2875 2876 if (pkt_dev->vlan_id != 0xffff) 2877 protocol = htons(ETH_P_8021Q); 2878 2879 /* Update any of the values, used when we're incrementing various 2880 * fields. 2881 */ 2882 queue_map = pkt_dev->cur_queue_map; 2883 mod_cur_headers(pkt_dev); 2884 2885 skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16 + 2886 pkt_dev->pkt_overhead, GFP_ATOMIC); 2887 if (!skb) { 2888 sprintf(pkt_dev->result, "No memory"); 2889 return NULL; 2890 } 2891 2892 skb_reserve(skb, 16); 2893 2894 /* Reserve for ethernet and IP header */ 2895 eth = (__u8 *) skb_push(skb, 14); 2896 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2897 if (pkt_dev->nr_labels) 2898 mpls_push(mpls, pkt_dev); 2899 2900 if (pkt_dev->vlan_id != 0xffff) { 2901 if (pkt_dev->svlan_id != 0xffff) { 2902 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2903 *svlan_tci = build_tci(pkt_dev->svlan_id, 2904 pkt_dev->svlan_cfi, 2905 pkt_dev->svlan_p); 2906 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2907 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2908 } 2909 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2910 *vlan_tci = build_tci(pkt_dev->vlan_id, 2911 pkt_dev->vlan_cfi, 2912 pkt_dev->vlan_p); 2913 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2914 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 2915 } 2916 2917 skb->network_header = skb->tail; 2918 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr); 2919 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr)); 2920 skb_set_queue_mapping(skb, queue_map); 2921 iph = ipv6_hdr(skb); 2922 udph = udp_hdr(skb); 2923 2924 memcpy(eth, pkt_dev->hh, 12); 2925 *(__be16 *) & eth[12] = protocol; 2926 2927 /* Eth + IPh + UDPh + mpls */ 2928 datalen = pkt_dev->cur_pkt_size - 14 - 2929 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 2930 pkt_dev->pkt_overhead; 2931 2932 if (datalen < sizeof(struct pktgen_hdr)) { 2933 datalen = sizeof(struct pktgen_hdr); 2934 if (net_ratelimit()) 2935 printk(KERN_INFO "pktgen: increased datalen to %d\n", 2936 datalen); 2937 } 2938 2939 udph->source = htons(pkt_dev->cur_udp_src); 2940 udph->dest = htons(pkt_dev->cur_udp_dst); 2941 udph->len = htons(datalen + sizeof(struct udphdr)); 2942 udph->check = 0; /* No checksum */ 2943 2944 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 2945 2946 if (pkt_dev->traffic_class) { 2947 /* Version + traffic class + flow (0) */ 2948 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 2949 } 2950 2951 iph->hop_limit = 32; 2952 2953 iph->payload_len = htons(sizeof(struct udphdr) + datalen); 2954 iph->nexthdr = IPPROTO_UDP; 2955 2956 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr); 2957 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr); 2958 2959 skb->mac_header = (skb->network_header - ETH_HLEN - 2960 pkt_dev->pkt_overhead); 2961 skb->protocol = protocol; 2962 skb->dev = odev; 2963 skb->pkt_type = PACKET_HOST; 2964 2965 if (pkt_dev->nfrags <= 0) 2966 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 2967 else { 2968 int frags = pkt_dev->nfrags; 2969 int i; 2970 2971 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 2972 2973 if (frags > MAX_SKB_FRAGS) 2974 frags = MAX_SKB_FRAGS; 2975 if (datalen > frags * PAGE_SIZE) { 2976 skb_put(skb, datalen - frags * PAGE_SIZE); 2977 datalen = frags * PAGE_SIZE; 2978 } 2979 2980 i = 0; 2981 while (datalen > 0) { 2982 struct page *page = alloc_pages(GFP_KERNEL, 0); 2983 skb_shinfo(skb)->frags[i].page = page; 2984 skb_shinfo(skb)->frags[i].page_offset = 0; 2985 skb_shinfo(skb)->frags[i].size = 2986 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 2987 datalen -= skb_shinfo(skb)->frags[i].size; 2988 skb->len += skb_shinfo(skb)->frags[i].size; 2989 skb->data_len += skb_shinfo(skb)->frags[i].size; 2990 i++; 2991 skb_shinfo(skb)->nr_frags = i; 2992 } 2993 2994 while (i < frags) { 2995 int rem; 2996 2997 if (i == 0) 2998 break; 2999 3000 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 3001 if (rem == 0) 3002 break; 3003 3004 skb_shinfo(skb)->frags[i - 1].size -= rem; 3005 3006 skb_shinfo(skb)->frags[i] = 3007 skb_shinfo(skb)->frags[i - 1]; 3008 get_page(skb_shinfo(skb)->frags[i].page); 3009 skb_shinfo(skb)->frags[i].page = 3010 skb_shinfo(skb)->frags[i - 1].page; 3011 skb_shinfo(skb)->frags[i].page_offset += 3012 skb_shinfo(skb)->frags[i - 1].size; 3013 skb_shinfo(skb)->frags[i].size = rem; 3014 i++; 3015 skb_shinfo(skb)->nr_frags = i; 3016 } 3017 } 3018 3019 /* Stamp the time, and sequence number, convert them to network byte order */ 3020 /* should we update cloned packets too ? */ 3021 if (pgh) { 3022 struct timeval timestamp; 3023 3024 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 3025 pgh->seq_num = htonl(pkt_dev->seq_num); 3026 3027 do_gettimeofday(×tamp); 3028 pgh->tv_sec = htonl(timestamp.tv_sec); 3029 pgh->tv_usec = htonl(timestamp.tv_usec); 3030 } 3031 /* pkt_dev->seq_num++; FF: you really mean this? */ 3032 3033 return skb; 3034 } 3035 3036 static inline struct sk_buff *fill_packet(struct net_device *odev, 3037 struct pktgen_dev *pkt_dev) 3038 { 3039 if (pkt_dev->flags & F_IPV6) 3040 return fill_packet_ipv6(odev, pkt_dev); 3041 else 3042 return fill_packet_ipv4(odev, pkt_dev); 3043 } 3044 3045 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 3046 { 3047 pkt_dev->seq_num = 1; 3048 pkt_dev->idle_acc = 0; 3049 pkt_dev->sofar = 0; 3050 pkt_dev->tx_bytes = 0; 3051 pkt_dev->errors = 0; 3052 } 3053 3054 /* Set up structure for sending pkts, clear counters */ 3055 3056 static void pktgen_run(struct pktgen_thread *t) 3057 { 3058 struct pktgen_dev *pkt_dev; 3059 int started = 0; 3060 3061 pr_debug("pktgen: entering pktgen_run. %p\n", t); 3062 3063 if_lock(t); 3064 list_for_each_entry(pkt_dev, &t->if_list, list) { 3065 3066 /* 3067 * setup odev and create initial packet. 3068 */ 3069 pktgen_setup_inject(pkt_dev); 3070 3071 if (pkt_dev->odev) { 3072 pktgen_clear_counters(pkt_dev); 3073 pkt_dev->running = 1; /* Cranke yeself! */ 3074 pkt_dev->skb = NULL; 3075 pkt_dev->started_at = getCurUs(); 3076 pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */ 3077 pkt_dev->next_tx_ns = 0; 3078 set_pkt_overhead(pkt_dev); 3079 3080 strcpy(pkt_dev->result, "Starting"); 3081 started++; 3082 } else 3083 strcpy(pkt_dev->result, "Error starting"); 3084 } 3085 if_unlock(t); 3086 if (started) 3087 t->control &= ~(T_STOP); 3088 } 3089 3090 static void pktgen_stop_all_threads_ifs(void) 3091 { 3092 struct pktgen_thread *t; 3093 3094 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n"); 3095 3096 mutex_lock(&pktgen_thread_lock); 3097 3098 list_for_each_entry(t, &pktgen_threads, th_list) 3099 t->control |= T_STOP; 3100 3101 mutex_unlock(&pktgen_thread_lock); 3102 } 3103 3104 static int thread_is_running(struct pktgen_thread *t) 3105 { 3106 struct pktgen_dev *pkt_dev; 3107 int res = 0; 3108 3109 list_for_each_entry(pkt_dev, &t->if_list, list) 3110 if (pkt_dev->running) { 3111 res = 1; 3112 break; 3113 } 3114 return res; 3115 } 3116 3117 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3118 { 3119 if_lock(t); 3120 3121 while (thread_is_running(t)) { 3122 3123 if_unlock(t); 3124 3125 msleep_interruptible(100); 3126 3127 if (signal_pending(current)) 3128 goto signal; 3129 if_lock(t); 3130 } 3131 if_unlock(t); 3132 return 1; 3133 signal: 3134 return 0; 3135 } 3136 3137 static int pktgen_wait_all_threads_run(void) 3138 { 3139 struct pktgen_thread *t; 3140 int sig = 1; 3141 3142 mutex_lock(&pktgen_thread_lock); 3143 3144 list_for_each_entry(t, &pktgen_threads, th_list) { 3145 sig = pktgen_wait_thread_run(t); 3146 if (sig == 0) 3147 break; 3148 } 3149 3150 if (sig == 0) 3151 list_for_each_entry(t, &pktgen_threads, th_list) 3152 t->control |= (T_STOP); 3153 3154 mutex_unlock(&pktgen_thread_lock); 3155 return sig; 3156 } 3157 3158 static void pktgen_run_all_threads(void) 3159 { 3160 struct pktgen_thread *t; 3161 3162 pr_debug("pktgen: entering pktgen_run_all_threads.\n"); 3163 3164 mutex_lock(&pktgen_thread_lock); 3165 3166 list_for_each_entry(t, &pktgen_threads, th_list) 3167 t->control |= (T_RUN); 3168 3169 mutex_unlock(&pktgen_thread_lock); 3170 3171 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 3172 3173 pktgen_wait_all_threads_run(); 3174 } 3175 3176 static void pktgen_reset_all_threads(void) 3177 { 3178 struct pktgen_thread *t; 3179 3180 pr_debug("pktgen: entering pktgen_reset_all_threads.\n"); 3181 3182 mutex_lock(&pktgen_thread_lock); 3183 3184 list_for_each_entry(t, &pktgen_threads, th_list) 3185 t->control |= (T_REMDEVALL); 3186 3187 mutex_unlock(&pktgen_thread_lock); 3188 3189 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 3190 3191 pktgen_wait_all_threads_run(); 3192 } 3193 3194 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3195 { 3196 __u64 total_us, bps, mbps, pps, idle; 3197 char *p = pkt_dev->result; 3198 3199 total_us = pkt_dev->stopped_at - pkt_dev->started_at; 3200 3201 idle = pkt_dev->idle_acc; 3202 3203 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", 3204 (unsigned long long)total_us, 3205 (unsigned long long)(total_us - idle), 3206 (unsigned long long)idle, 3207 (unsigned long long)pkt_dev->sofar, 3208 pkt_dev->cur_pkt_size, nr_frags); 3209 3210 pps = pkt_dev->sofar * USEC_PER_SEC; 3211 3212 while ((total_us >> 32) != 0) { 3213 pps >>= 1; 3214 total_us >>= 1; 3215 } 3216 3217 do_div(pps, total_us); 3218 3219 bps = pps * 8 * pkt_dev->cur_pkt_size; 3220 3221 mbps = bps; 3222 do_div(mbps, 1000000); 3223 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3224 (unsigned long long)pps, 3225 (unsigned long long)mbps, 3226 (unsigned long long)bps, 3227 (unsigned long long)pkt_dev->errors); 3228 } 3229 3230 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3231 3232 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3233 { 3234 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3235 3236 if (!pkt_dev->running) { 3237 printk(KERN_WARNING "pktgen: interface: %s is already " 3238 "stopped\n", pkt_dev->odev->name); 3239 return -EINVAL; 3240 } 3241 3242 pkt_dev->stopped_at = getCurUs(); 3243 pkt_dev->running = 0; 3244 3245 show_results(pkt_dev, nr_frags); 3246 3247 return 0; 3248 } 3249 3250 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3251 { 3252 struct pktgen_dev *pkt_dev, *best = NULL; 3253 3254 if_lock(t); 3255 3256 list_for_each_entry(pkt_dev, &t->if_list, list) { 3257 if (!pkt_dev->running) 3258 continue; 3259 if (best == NULL) 3260 best = pkt_dev; 3261 else if (pkt_dev->next_tx_us < best->next_tx_us) 3262 best = pkt_dev; 3263 } 3264 if_unlock(t); 3265 return best; 3266 } 3267 3268 static void pktgen_stop(struct pktgen_thread *t) 3269 { 3270 struct pktgen_dev *pkt_dev; 3271 3272 pr_debug("pktgen: entering pktgen_stop\n"); 3273 3274 if_lock(t); 3275 3276 list_for_each_entry(pkt_dev, &t->if_list, list) { 3277 pktgen_stop_device(pkt_dev); 3278 kfree_skb(pkt_dev->skb); 3279 3280 pkt_dev->skb = NULL; 3281 } 3282 3283 if_unlock(t); 3284 } 3285 3286 /* 3287 * one of our devices needs to be removed - find it 3288 * and remove it 3289 */ 3290 static void pktgen_rem_one_if(struct pktgen_thread *t) 3291 { 3292 struct list_head *q, *n; 3293 struct pktgen_dev *cur; 3294 3295 pr_debug("pktgen: entering pktgen_rem_one_if\n"); 3296 3297 if_lock(t); 3298 3299 list_for_each_safe(q, n, &t->if_list) { 3300 cur = list_entry(q, struct pktgen_dev, list); 3301 3302 if (!cur->removal_mark) 3303 continue; 3304 3305 kfree_skb(cur->skb); 3306 cur->skb = NULL; 3307 3308 pktgen_remove_device(t, cur); 3309 3310 break; 3311 } 3312 3313 if_unlock(t); 3314 } 3315 3316 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3317 { 3318 struct list_head *q, *n; 3319 struct pktgen_dev *cur; 3320 3321 /* Remove all devices, free mem */ 3322 3323 pr_debug("pktgen: entering pktgen_rem_all_ifs\n"); 3324 if_lock(t); 3325 3326 list_for_each_safe(q, n, &t->if_list) { 3327 cur = list_entry(q, struct pktgen_dev, list); 3328 3329 kfree_skb(cur->skb); 3330 cur->skb = NULL; 3331 3332 pktgen_remove_device(t, cur); 3333 } 3334 3335 if_unlock(t); 3336 } 3337 3338 static void pktgen_rem_thread(struct pktgen_thread *t) 3339 { 3340 /* Remove from the thread list */ 3341 3342 remove_proc_entry(t->tsk->comm, pg_proc_dir); 3343 3344 mutex_lock(&pktgen_thread_lock); 3345 3346 list_del(&t->th_list); 3347 3348 mutex_unlock(&pktgen_thread_lock); 3349 } 3350 3351 static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev) 3352 { 3353 struct net_device *odev = pkt_dev->odev; 3354 int (*xmit)(struct sk_buff *, struct net_device *) 3355 = odev->netdev_ops->ndo_start_xmit; 3356 struct netdev_queue *txq; 3357 __u64 idle_start = 0; 3358 u16 queue_map; 3359 int ret; 3360 3361 if (pkt_dev->delay_us || pkt_dev->delay_ns) { 3362 u64 now; 3363 3364 now = getCurUs(); 3365 if (now < pkt_dev->next_tx_us) 3366 spin(pkt_dev, pkt_dev->next_tx_us); 3367 3368 /* This is max DELAY, this has special meaning of 3369 * "never transmit" 3370 */ 3371 if (pkt_dev->delay_us == 0x7FFFFFFF) { 3372 pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us; 3373 pkt_dev->next_tx_ns = pkt_dev->delay_ns; 3374 goto out; 3375 } 3376 } 3377 3378 if (!pkt_dev->skb) { 3379 set_cur_queue_map(pkt_dev); 3380 queue_map = pkt_dev->cur_queue_map; 3381 } else { 3382 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3383 } 3384 3385 txq = netdev_get_tx_queue(odev, queue_map); 3386 if (netif_tx_queue_stopped(txq) || 3387 netif_tx_queue_frozen(txq) || 3388 need_resched()) { 3389 idle_start = getCurUs(); 3390 3391 if (!netif_running(odev)) { 3392 pktgen_stop_device(pkt_dev); 3393 kfree_skb(pkt_dev->skb); 3394 pkt_dev->skb = NULL; 3395 goto out; 3396 } 3397 if (need_resched()) 3398 schedule(); 3399 3400 pkt_dev->idle_acc += getCurUs() - idle_start; 3401 3402 if (netif_tx_queue_stopped(txq) || 3403 netif_tx_queue_frozen(txq)) { 3404 pkt_dev->next_tx_us = getCurUs(); /* TODO */ 3405 pkt_dev->next_tx_ns = 0; 3406 goto out; /* Try the next interface */ 3407 } 3408 } 3409 3410 if (pkt_dev->last_ok || !pkt_dev->skb) { 3411 if ((++pkt_dev->clone_count >= pkt_dev->clone_skb) 3412 || (!pkt_dev->skb)) { 3413 /* build a new pkt */ 3414 kfree_skb(pkt_dev->skb); 3415 3416 pkt_dev->skb = fill_packet(odev, pkt_dev); 3417 if (pkt_dev->skb == NULL) { 3418 printk(KERN_ERR "pktgen: ERROR: couldn't " 3419 "allocate skb in fill_packet.\n"); 3420 schedule(); 3421 pkt_dev->clone_count--; /* back out increment, OOM */ 3422 goto out; 3423 } 3424 pkt_dev->allocated_skbs++; 3425 pkt_dev->clone_count = 0; /* reset counter */ 3426 } 3427 } 3428 3429 /* fill_packet() might have changed the queue */ 3430 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3431 txq = netdev_get_tx_queue(odev, queue_map); 3432 3433 __netif_tx_lock_bh(txq); 3434 if (!netif_tx_queue_stopped(txq) && 3435 !netif_tx_queue_frozen(txq)) { 3436 3437 atomic_inc(&(pkt_dev->skb->users)); 3438 retry_now: 3439 ret = (*xmit)(pkt_dev->skb, odev); 3440 if (likely(ret == NETDEV_TX_OK)) { 3441 pkt_dev->last_ok = 1; 3442 pkt_dev->sofar++; 3443 pkt_dev->seq_num++; 3444 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size; 3445 3446 } else if (ret == NETDEV_TX_LOCKED 3447 && (odev->features & NETIF_F_LLTX)) { 3448 cpu_relax(); 3449 goto retry_now; 3450 } else { /* Retry it next time */ 3451 3452 atomic_dec(&(pkt_dev->skb->users)); 3453 3454 if (debug && net_ratelimit()) 3455 printk(KERN_INFO "pktgen: Hard xmit error\n"); 3456 3457 pkt_dev->errors++; 3458 pkt_dev->last_ok = 0; 3459 } 3460 3461 pkt_dev->next_tx_us = getCurUs(); 3462 pkt_dev->next_tx_ns = 0; 3463 3464 pkt_dev->next_tx_us += pkt_dev->delay_us; 3465 pkt_dev->next_tx_ns += pkt_dev->delay_ns; 3466 3467 if (pkt_dev->next_tx_ns > 1000) { 3468 pkt_dev->next_tx_us++; 3469 pkt_dev->next_tx_ns -= 1000; 3470 } 3471 } 3472 3473 else { /* Retry it next time */ 3474 pkt_dev->last_ok = 0; 3475 pkt_dev->next_tx_us = getCurUs(); /* TODO */ 3476 pkt_dev->next_tx_ns = 0; 3477 } 3478 3479 __netif_tx_unlock_bh(txq); 3480 3481 /* If pkt_dev->count is zero, then run forever */ 3482 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3483 if (atomic_read(&(pkt_dev->skb->users)) != 1) { 3484 idle_start = getCurUs(); 3485 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3486 if (signal_pending(current)) { 3487 break; 3488 } 3489 schedule(); 3490 } 3491 pkt_dev->idle_acc += getCurUs() - idle_start; 3492 } 3493 3494 /* Done with this */ 3495 pktgen_stop_device(pkt_dev); 3496 kfree_skb(pkt_dev->skb); 3497 pkt_dev->skb = NULL; 3498 } 3499 out:; 3500 } 3501 3502 /* 3503 * Main loop of the thread goes here 3504 */ 3505 3506 static int pktgen_thread_worker(void *arg) 3507 { 3508 DEFINE_WAIT(wait); 3509 struct pktgen_thread *t = arg; 3510 struct pktgen_dev *pkt_dev = NULL; 3511 int cpu = t->cpu; 3512 3513 BUG_ON(smp_processor_id() != cpu); 3514 3515 init_waitqueue_head(&t->queue); 3516 complete(&t->start_done); 3517 3518 pr_debug("pktgen: starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); 3519 3520 set_current_state(TASK_INTERRUPTIBLE); 3521 3522 set_freezable(); 3523 3524 while (!kthread_should_stop()) { 3525 pkt_dev = next_to_run(t); 3526 3527 if (!pkt_dev && 3528 (t->control & (T_STOP | T_RUN | T_REMDEVALL | T_REMDEV)) 3529 == 0) { 3530 prepare_to_wait(&(t->queue), &wait, 3531 TASK_INTERRUPTIBLE); 3532 schedule_timeout(HZ / 10); 3533 finish_wait(&(t->queue), &wait); 3534 } 3535 3536 __set_current_state(TASK_RUNNING); 3537 3538 if (pkt_dev) 3539 pktgen_xmit(pkt_dev); 3540 3541 if (t->control & T_STOP) { 3542 pktgen_stop(t); 3543 t->control &= ~(T_STOP); 3544 } 3545 3546 if (t->control & T_RUN) { 3547 pktgen_run(t); 3548 t->control &= ~(T_RUN); 3549 } 3550 3551 if (t->control & T_REMDEVALL) { 3552 pktgen_rem_all_ifs(t); 3553 t->control &= ~(T_REMDEVALL); 3554 } 3555 3556 if (t->control & T_REMDEV) { 3557 pktgen_rem_one_if(t); 3558 t->control &= ~(T_REMDEV); 3559 } 3560 3561 try_to_freeze(); 3562 3563 set_current_state(TASK_INTERRUPTIBLE); 3564 } 3565 3566 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm); 3567 pktgen_stop(t); 3568 3569 pr_debug("pktgen: %s removing all device\n", t->tsk->comm); 3570 pktgen_rem_all_ifs(t); 3571 3572 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm); 3573 pktgen_rem_thread(t); 3574 3575 return 0; 3576 } 3577 3578 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3579 const char *ifname) 3580 { 3581 struct pktgen_dev *p, *pkt_dev = NULL; 3582 if_lock(t); 3583 3584 list_for_each_entry(p, &t->if_list, list) 3585 if (strncmp(p->odev->name, ifname, IFNAMSIZ) == 0) { 3586 pkt_dev = p; 3587 break; 3588 } 3589 3590 if_unlock(t); 3591 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev); 3592 return pkt_dev; 3593 } 3594 3595 /* 3596 * Adds a dev at front of if_list. 3597 */ 3598 3599 static int add_dev_to_thread(struct pktgen_thread *t, 3600 struct pktgen_dev *pkt_dev) 3601 { 3602 int rv = 0; 3603 3604 if_lock(t); 3605 3606 if (pkt_dev->pg_thread) { 3607 printk(KERN_ERR "pktgen: ERROR: already assigned " 3608 "to a thread.\n"); 3609 rv = -EBUSY; 3610 goto out; 3611 } 3612 3613 list_add(&pkt_dev->list, &t->if_list); 3614 pkt_dev->pg_thread = t; 3615 pkt_dev->running = 0; 3616 3617 out: 3618 if_unlock(t); 3619 return rv; 3620 } 3621 3622 /* Called under thread lock */ 3623 3624 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3625 { 3626 struct pktgen_dev *pkt_dev; 3627 int err; 3628 3629 /* We don't allow a device to be on several threads */ 3630 3631 pkt_dev = __pktgen_NN_threads(ifname, FIND); 3632 if (pkt_dev) { 3633 printk(KERN_ERR "pktgen: ERROR: interface already used.\n"); 3634 return -EBUSY; 3635 } 3636 3637 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL); 3638 if (!pkt_dev) 3639 return -ENOMEM; 3640 3641 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state)); 3642 if (pkt_dev->flows == NULL) { 3643 kfree(pkt_dev); 3644 return -ENOMEM; 3645 } 3646 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state)); 3647 3648 pkt_dev->removal_mark = 0; 3649 pkt_dev->min_pkt_size = ETH_ZLEN; 3650 pkt_dev->max_pkt_size = ETH_ZLEN; 3651 pkt_dev->nfrags = 0; 3652 pkt_dev->clone_skb = pg_clone_skb_d; 3653 pkt_dev->delay_us = pg_delay_d / 1000; 3654 pkt_dev->delay_ns = pg_delay_d % 1000; 3655 pkt_dev->count = pg_count_d; 3656 pkt_dev->sofar = 0; 3657 pkt_dev->udp_src_min = 9; /* sink port */ 3658 pkt_dev->udp_src_max = 9; 3659 pkt_dev->udp_dst_min = 9; 3660 pkt_dev->udp_dst_max = 9; 3661 3662 pkt_dev->vlan_p = 0; 3663 pkt_dev->vlan_cfi = 0; 3664 pkt_dev->vlan_id = 0xffff; 3665 pkt_dev->svlan_p = 0; 3666 pkt_dev->svlan_cfi = 0; 3667 pkt_dev->svlan_id = 0xffff; 3668 3669 err = pktgen_setup_dev(pkt_dev, ifname); 3670 if (err) 3671 goto out1; 3672 3673 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir, 3674 &pktgen_if_fops, pkt_dev); 3675 if (!pkt_dev->entry) { 3676 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n", 3677 PG_PROC_DIR, ifname); 3678 err = -EINVAL; 3679 goto out2; 3680 } 3681 #ifdef CONFIG_XFRM 3682 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3683 pkt_dev->ipsproto = IPPROTO_ESP; 3684 #endif 3685 3686 return add_dev_to_thread(t, pkt_dev); 3687 out2: 3688 dev_put(pkt_dev->odev); 3689 out1: 3690 #ifdef CONFIG_XFRM 3691 free_SAs(pkt_dev); 3692 #endif 3693 if (pkt_dev->flows) 3694 vfree(pkt_dev->flows); 3695 kfree(pkt_dev); 3696 return err; 3697 } 3698 3699 static int __init pktgen_create_thread(int cpu) 3700 { 3701 struct pktgen_thread *t; 3702 struct proc_dir_entry *pe; 3703 struct task_struct *p; 3704 3705 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL); 3706 if (!t) { 3707 printk(KERN_ERR "pktgen: ERROR: out of memory, can't " 3708 "create new thread.\n"); 3709 return -ENOMEM; 3710 } 3711 3712 spin_lock_init(&t->if_lock); 3713 t->cpu = cpu; 3714 3715 INIT_LIST_HEAD(&t->if_list); 3716 3717 list_add_tail(&t->th_list, &pktgen_threads); 3718 init_completion(&t->start_done); 3719 3720 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu); 3721 if (IS_ERR(p)) { 3722 printk(KERN_ERR "pktgen: kernel_thread() failed " 3723 "for cpu %d\n", t->cpu); 3724 list_del(&t->th_list); 3725 kfree(t); 3726 return PTR_ERR(p); 3727 } 3728 kthread_bind(p, cpu); 3729 t->tsk = p; 3730 3731 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir, 3732 &pktgen_thread_fops, t); 3733 if (!pe) { 3734 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n", 3735 PG_PROC_DIR, t->tsk->comm); 3736 kthread_stop(p); 3737 list_del(&t->th_list); 3738 kfree(t); 3739 return -EINVAL; 3740 } 3741 3742 wake_up_process(p); 3743 wait_for_completion(&t->start_done); 3744 3745 return 0; 3746 } 3747 3748 /* 3749 * Removes a device from the thread if_list. 3750 */ 3751 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3752 struct pktgen_dev *pkt_dev) 3753 { 3754 struct list_head *q, *n; 3755 struct pktgen_dev *p; 3756 3757 list_for_each_safe(q, n, &t->if_list) { 3758 p = list_entry(q, struct pktgen_dev, list); 3759 if (p == pkt_dev) 3760 list_del(&p->list); 3761 } 3762 } 3763 3764 static int pktgen_remove_device(struct pktgen_thread *t, 3765 struct pktgen_dev *pkt_dev) 3766 { 3767 3768 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev); 3769 3770 if (pkt_dev->running) { 3771 printk(KERN_WARNING "pktgen: WARNING: trying to remove a " 3772 "running interface, stopping it now.\n"); 3773 pktgen_stop_device(pkt_dev); 3774 } 3775 3776 /* Dis-associate from the interface */ 3777 3778 if (pkt_dev->odev) { 3779 dev_put(pkt_dev->odev); 3780 pkt_dev->odev = NULL; 3781 } 3782 3783 /* And update the thread if_list */ 3784 3785 _rem_dev_from_if_list(t, pkt_dev); 3786 3787 if (pkt_dev->entry) 3788 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 3789 3790 #ifdef CONFIG_XFRM 3791 free_SAs(pkt_dev); 3792 #endif 3793 if (pkt_dev->flows) 3794 vfree(pkt_dev->flows); 3795 kfree(pkt_dev); 3796 return 0; 3797 } 3798 3799 static int __init pg_init(void) 3800 { 3801 int cpu; 3802 struct proc_dir_entry *pe; 3803 3804 printk(KERN_INFO "%s", version); 3805 3806 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net); 3807 if (!pg_proc_dir) 3808 return -ENODEV; 3809 3810 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops); 3811 if (pe == NULL) { 3812 printk(KERN_ERR "pktgen: ERROR: cannot create %s " 3813 "procfs entry.\n", PGCTRL); 3814 proc_net_remove(&init_net, PG_PROC_DIR); 3815 return -EINVAL; 3816 } 3817 3818 /* Register us to receive netdevice events */ 3819 register_netdevice_notifier(&pktgen_notifier_block); 3820 3821 for_each_online_cpu(cpu) { 3822 int err; 3823 3824 err = pktgen_create_thread(cpu); 3825 if (err) 3826 printk(KERN_WARNING "pktgen: WARNING: Cannot create " 3827 "thread for cpu %d (%d)\n", cpu, err); 3828 } 3829 3830 if (list_empty(&pktgen_threads)) { 3831 printk(KERN_ERR "pktgen: ERROR: Initialization failed for " 3832 "all threads\n"); 3833 unregister_netdevice_notifier(&pktgen_notifier_block); 3834 remove_proc_entry(PGCTRL, pg_proc_dir); 3835 proc_net_remove(&init_net, PG_PROC_DIR); 3836 return -ENODEV; 3837 } 3838 3839 return 0; 3840 } 3841 3842 static void __exit pg_cleanup(void) 3843 { 3844 struct pktgen_thread *t; 3845 struct list_head *q, *n; 3846 wait_queue_head_t queue; 3847 init_waitqueue_head(&queue); 3848 3849 /* Stop all interfaces & threads */ 3850 3851 list_for_each_safe(q, n, &pktgen_threads) { 3852 t = list_entry(q, struct pktgen_thread, th_list); 3853 kthread_stop(t->tsk); 3854 kfree(t); 3855 } 3856 3857 /* Un-register us from receiving netdevice events */ 3858 unregister_netdevice_notifier(&pktgen_notifier_block); 3859 3860 /* Clean up proc file system */ 3861 remove_proc_entry(PGCTRL, pg_proc_dir); 3862 proc_net_remove(&init_net, PG_PROC_DIR); 3863 } 3864 3865 module_init(pg_init); 3866 module_exit(pg_cleanup); 3867 3868 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se"); 3869 MODULE_DESCRIPTION("Packet Generator tool"); 3870 MODULE_LICENSE("GPL"); 3871 module_param(pg_count_d, int, 0); 3872 module_param(pg_delay_d, int, 0); 3873 module_param(pg_clone_skb_d, int, 0); 3874 module_param(debug, int, 0); 3875