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/hrtimer.h> 135 #include <linux/freezer.h> 136 #include <linux/delay.h> 137 #include <linux/timer.h> 138 #include <linux/list.h> 139 #include <linux/init.h> 140 #include <linux/skbuff.h> 141 #include <linux/netdevice.h> 142 #include <linux/inet.h> 143 #include <linux/inetdevice.h> 144 #include <linux/rtnetlink.h> 145 #include <linux/if_arp.h> 146 #include <linux/if_vlan.h> 147 #include <linux/in.h> 148 #include <linux/ip.h> 149 #include <linux/ipv6.h> 150 #include <linux/udp.h> 151 #include <linux/proc_fs.h> 152 #include <linux/seq_file.h> 153 #include <linux/wait.h> 154 #include <linux/etherdevice.h> 155 #include <linux/kthread.h> 156 #include <net/net_namespace.h> 157 #include <net/checksum.h> 158 #include <net/ipv6.h> 159 #include <net/addrconf.h> 160 #ifdef CONFIG_XFRM 161 #include <net/xfrm.h> 162 #endif 163 #include <asm/byteorder.h> 164 #include <linux/rcupdate.h> 165 #include <linux/bitops.h> 166 #include <linux/io.h> 167 #include <linux/timex.h> 168 #include <linux/uaccess.h> 169 #include <asm/dma.h> 170 #include <asm/div64.h> /* do_div */ 171 172 #define VERSION "2.72" 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; 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; /* chaining in the thread's run-queue */ 235 236 int running; /* if 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 u64 delay; /* nano-seconds */ 250 251 __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, 255 pkts will be re-sent */ 256 257 /* runtime counters relating to clone_skb */ 258 259 __u64 allocated_skbs; 260 __u32 clone_count; 261 int last_ok; /* Was last skb sent? 262 * Or a failed transmit of some sort? 263 * This will keep sequence numbers in order 264 */ 265 ktime_t next_tx; 266 ktime_t started_at; 267 ktime_t stopped_at; 268 u64 idle_acc; /* nano-seconds */ 269 270 __u32 seq_num; 271 272 int clone_skb; /* 273 * Use multiple SKBs during packet gen. 274 * If this number is greater than 1, then 275 * that many copies of the same packet will be 276 * sent before a new packet is allocated. 277 * If you want to send 1024 identical packets 278 * before creating a new packet, 279 * set clone_skb to 1024. 280 */ 281 282 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 283 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 284 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 285 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 286 287 struct in6_addr in6_saddr; 288 struct in6_addr in6_daddr; 289 struct in6_addr cur_in6_daddr; 290 struct in6_addr cur_in6_saddr; 291 /* For ranges */ 292 struct in6_addr min_in6_daddr; 293 struct in6_addr max_in6_daddr; 294 struct in6_addr min_in6_saddr; 295 struct in6_addr max_in6_saddr; 296 297 /* If we're doing ranges, random or incremental, then this 298 * defines the min/max for those ranges. 299 */ 300 __be32 saddr_min; /* inclusive, source IP address */ 301 __be32 saddr_max; /* exclusive, source IP address */ 302 __be32 daddr_min; /* inclusive, dest IP address */ 303 __be32 daddr_max; /* exclusive, dest IP address */ 304 305 __u16 udp_src_min; /* inclusive, source UDP port */ 306 __u16 udp_src_max; /* exclusive, source UDP port */ 307 __u16 udp_dst_min; /* inclusive, dest UDP port */ 308 __u16 udp_dst_max; /* exclusive, dest UDP port */ 309 310 /* DSCP + ECN */ 311 __u8 tos; /* six MSB of (former) IPv4 TOS 312 are for dscp codepoint */ 313 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 314 (see RFC 3260, sec. 4) */ 315 316 /* MPLS */ 317 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */ 318 __be32 labels[MAX_MPLS_LABELS]; 319 320 /* VLAN/SVLAN (802.1Q/Q-in-Q) */ 321 __u8 vlan_p; 322 __u8 vlan_cfi; 323 __u16 vlan_id; /* 0xffff means no vlan tag */ 324 325 __u8 svlan_p; 326 __u8 svlan_cfi; 327 __u16 svlan_id; /* 0xffff means no svlan tag */ 328 329 __u32 src_mac_count; /* How many MACs to iterate through */ 330 __u32 dst_mac_count; /* How many MACs to iterate through */ 331 332 unsigned char dst_mac[ETH_ALEN]; 333 unsigned char src_mac[ETH_ALEN]; 334 335 __u32 cur_dst_mac_offset; 336 __u32 cur_src_mac_offset; 337 __be32 cur_saddr; 338 __be32 cur_daddr; 339 __u16 cur_udp_dst; 340 __u16 cur_udp_src; 341 __u16 cur_queue_map; 342 __u32 cur_pkt_size; 343 344 __u8 hh[14]; 345 /* = { 346 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, 347 348 We fill in SRC address later 349 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 350 0x08, 0x00 351 }; 352 */ 353 __u16 pad; /* pad out the hh struct to an even 16 bytes */ 354 355 struct sk_buff *skb; /* skb we are to transmit next, used for when we 356 * are transmitting the same one multiple times 357 */ 358 struct net_device *odev; /* The out-going device. 359 * Note that the device should have it's 360 * pg_info pointer pointing back to this 361 * device. 362 * Set when the user specifies the out-going 363 * device name (not when the inject is 364 * started as it used to do.) 365 */ 366 struct flow_state *flows; 367 unsigned cflows; /* Concurrent flows (config) */ 368 unsigned lflow; /* Flow length (config) */ 369 unsigned nflows; /* accumulated flows (stats) */ 370 unsigned curfl; /* current sequenced flow (state)*/ 371 372 u16 queue_map_min; 373 u16 queue_map_max; 374 375 #ifdef CONFIG_XFRM 376 __u8 ipsmode; /* IPSEC mode (config) */ 377 __u8 ipsproto; /* IPSEC type (config) */ 378 #endif 379 char result[512]; 380 }; 381 382 struct pktgen_hdr { 383 __be32 pgh_magic; 384 __be32 seq_num; 385 __be32 tv_sec; 386 __be32 tv_usec; 387 }; 388 389 struct pktgen_thread { 390 spinlock_t if_lock; /* for list of devices */ 391 struct list_head if_list; /* All device here */ 392 struct list_head th_list; 393 struct task_struct *tsk; 394 char result[512]; 395 396 /* Field for thread to receive "posted" events terminate, 397 stop ifs etc. */ 398 399 u32 control; 400 int cpu; 401 402 wait_queue_head_t queue; 403 struct completion start_done; 404 }; 405 406 #define REMOVE 1 407 #define FIND 0 408 409 static inline ktime_t ktime_now(void) 410 { 411 struct timespec ts; 412 ktime_get_ts(&ts); 413 414 return timespec_to_ktime(ts); 415 } 416 417 /* This works even if 32 bit because of careful byte order choice */ 418 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2) 419 { 420 return cmp1.tv64 < cmp2.tv64; 421 } 422 423 static const char version[] = 424 "pktgen " VERSION ": Packet Generator for packet performance testing.\n"; 425 426 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i); 427 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname); 428 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 429 const char *ifname); 430 static int pktgen_device_event(struct notifier_block *, unsigned long, void *); 431 static void pktgen_run_all_threads(void); 432 static void pktgen_reset_all_threads(void); 433 static void pktgen_stop_all_threads_ifs(void); 434 435 static void pktgen_stop(struct pktgen_thread *t); 436 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); 437 438 static unsigned int scan_ip6(const char *s, char ip[16]); 439 static unsigned int fmt_ip6(char *s, const char ip[16]); 440 441 /* Module parameters, defaults. */ 442 static int pg_count_d __read_mostly = 1000; 443 static int pg_delay_d __read_mostly; 444 static int pg_clone_skb_d __read_mostly; 445 static int debug __read_mostly; 446 447 static DEFINE_MUTEX(pktgen_thread_lock); 448 static LIST_HEAD(pktgen_threads); 449 450 static struct notifier_block pktgen_notifier_block = { 451 .notifier_call = pktgen_device_event, 452 }; 453 454 /* 455 * /proc handling functions 456 * 457 */ 458 459 static int pgctrl_show(struct seq_file *seq, void *v) 460 { 461 seq_puts(seq, version); 462 return 0; 463 } 464 465 static ssize_t pgctrl_write(struct file *file, const char __user *buf, 466 size_t count, loff_t *ppos) 467 { 468 int err = 0; 469 char data[128]; 470 471 if (!capable(CAP_NET_ADMIN)) { 472 err = -EPERM; 473 goto out; 474 } 475 476 if (count > sizeof(data)) 477 count = sizeof(data); 478 479 if (copy_from_user(data, buf, count)) { 480 err = -EFAULT; 481 goto out; 482 } 483 data[count - 1] = 0; /* Make string */ 484 485 if (!strcmp(data, "stop")) 486 pktgen_stop_all_threads_ifs(); 487 488 else if (!strcmp(data, "start")) 489 pktgen_run_all_threads(); 490 491 else if (!strcmp(data, "reset")) 492 pktgen_reset_all_threads(); 493 494 else 495 printk(KERN_WARNING "pktgen: Unknown command: %s\n", data); 496 497 err = count; 498 499 out: 500 return err; 501 } 502 503 static int pgctrl_open(struct inode *inode, struct file *file) 504 { 505 return single_open(file, pgctrl_show, PDE(inode)->data); 506 } 507 508 static const struct file_operations pktgen_fops = { 509 .owner = THIS_MODULE, 510 .open = pgctrl_open, 511 .read = seq_read, 512 .llseek = seq_lseek, 513 .write = pgctrl_write, 514 .release = single_release, 515 }; 516 517 static int pktgen_if_show(struct seq_file *seq, void *v) 518 { 519 const struct pktgen_dev *pkt_dev = seq->private; 520 ktime_t stopped; 521 u64 idle; 522 523 seq_printf(seq, 524 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", 525 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, 526 pkt_dev->max_pkt_size); 527 528 seq_printf(seq, 529 " frags: %d delay: %llu clone_skb: %d ifname: %s\n", 530 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay, 531 pkt_dev->clone_skb, pkt_dev->odev->name); 532 533 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, 534 pkt_dev->lflow); 535 536 seq_printf(seq, 537 " queue_map_min: %u queue_map_max: %u\n", 538 pkt_dev->queue_map_min, 539 pkt_dev->queue_map_max); 540 541 if (pkt_dev->flags & F_IPV6) { 542 char b1[128], b2[128], b3[128]; 543 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr); 544 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr); 545 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr); 546 seq_printf(seq, 547 " saddr: %s min_saddr: %s max_saddr: %s\n", b1, 548 b2, b3); 549 550 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr); 551 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr); 552 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr); 553 seq_printf(seq, 554 " daddr: %s min_daddr: %s max_daddr: %s\n", b1, 555 b2, b3); 556 557 } else { 558 seq_printf(seq, 559 " dst_min: %s dst_max: %s\n", 560 pkt_dev->dst_min, pkt_dev->dst_max); 561 seq_printf(seq, 562 " src_min: %s src_max: %s\n", 563 pkt_dev->src_min, pkt_dev->src_max); 564 } 565 566 seq_puts(seq, " src_mac: "); 567 568 seq_printf(seq, "%pM ", 569 is_zero_ether_addr(pkt_dev->src_mac) ? 570 pkt_dev->odev->dev_addr : pkt_dev->src_mac); 571 572 seq_printf(seq, "dst_mac: "); 573 seq_printf(seq, "%pM\n", pkt_dev->dst_mac); 574 575 seq_printf(seq, 576 " udp_src_min: %d udp_src_max: %d" 577 " udp_dst_min: %d udp_dst_max: %d\n", 578 pkt_dev->udp_src_min, pkt_dev->udp_src_max, 579 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); 580 581 seq_printf(seq, 582 " src_mac_count: %d dst_mac_count: %d\n", 583 pkt_dev->src_mac_count, pkt_dev->dst_mac_count); 584 585 if (pkt_dev->nr_labels) { 586 unsigned i; 587 seq_printf(seq, " mpls: "); 588 for (i = 0; i < pkt_dev->nr_labels; i++) 589 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), 590 i == pkt_dev->nr_labels-1 ? "\n" : ", "); 591 } 592 593 if (pkt_dev->vlan_id != 0xffff) 594 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", 595 pkt_dev->vlan_id, pkt_dev->vlan_p, 596 pkt_dev->vlan_cfi); 597 598 if (pkt_dev->svlan_id != 0xffff) 599 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", 600 pkt_dev->svlan_id, pkt_dev->svlan_p, 601 pkt_dev->svlan_cfi); 602 603 if (pkt_dev->tos) 604 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); 605 606 if (pkt_dev->traffic_class) 607 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); 608 609 seq_printf(seq, " Flags: "); 610 611 if (pkt_dev->flags & F_IPV6) 612 seq_printf(seq, "IPV6 "); 613 614 if (pkt_dev->flags & F_IPSRC_RND) 615 seq_printf(seq, "IPSRC_RND "); 616 617 if (pkt_dev->flags & F_IPDST_RND) 618 seq_printf(seq, "IPDST_RND "); 619 620 if (pkt_dev->flags & F_TXSIZE_RND) 621 seq_printf(seq, "TXSIZE_RND "); 622 623 if (pkt_dev->flags & F_UDPSRC_RND) 624 seq_printf(seq, "UDPSRC_RND "); 625 626 if (pkt_dev->flags & F_UDPDST_RND) 627 seq_printf(seq, "UDPDST_RND "); 628 629 if (pkt_dev->flags & F_MPLS_RND) 630 seq_printf(seq, "MPLS_RND "); 631 632 if (pkt_dev->flags & F_QUEUE_MAP_RND) 633 seq_printf(seq, "QUEUE_MAP_RND "); 634 635 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 636 seq_printf(seq, "QUEUE_MAP_CPU "); 637 638 if (pkt_dev->cflows) { 639 if (pkt_dev->flags & F_FLOW_SEQ) 640 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/ 641 else 642 seq_printf(seq, "FLOW_RND "); 643 } 644 645 #ifdef CONFIG_XFRM 646 if (pkt_dev->flags & F_IPSEC_ON) 647 seq_printf(seq, "IPSEC "); 648 #endif 649 650 if (pkt_dev->flags & F_MACSRC_RND) 651 seq_printf(seq, "MACSRC_RND "); 652 653 if (pkt_dev->flags & F_MACDST_RND) 654 seq_printf(seq, "MACDST_RND "); 655 656 if (pkt_dev->flags & F_VID_RND) 657 seq_printf(seq, "VID_RND "); 658 659 if (pkt_dev->flags & F_SVID_RND) 660 seq_printf(seq, "SVID_RND "); 661 662 seq_puts(seq, "\n"); 663 664 /* not really stopped, more like last-running-at */ 665 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at; 666 idle = pkt_dev->idle_acc; 667 do_div(idle, NSEC_PER_USEC); 668 669 seq_printf(seq, 670 "Current:\n pkts-sofar: %llu errors: %llu\n", 671 (unsigned long long)pkt_dev->sofar, 672 (unsigned long long)pkt_dev->errors); 673 674 seq_printf(seq, 675 " started: %lluus stopped: %lluus idle: %lluus\n", 676 (unsigned long long) ktime_to_us(pkt_dev->started_at), 677 (unsigned long long) ktime_to_us(stopped), 678 (unsigned long long) idle); 679 680 seq_printf(seq, 681 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 682 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, 683 pkt_dev->cur_src_mac_offset); 684 685 if (pkt_dev->flags & F_IPV6) { 686 char b1[128], b2[128]; 687 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr); 688 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr); 689 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1); 690 } else 691 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n", 692 pkt_dev->cur_saddr, pkt_dev->cur_daddr); 693 694 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", 695 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 696 697 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); 698 699 seq_printf(seq, " flows: %u\n", pkt_dev->nflows); 700 701 if (pkt_dev->result[0]) 702 seq_printf(seq, "Result: %s\n", pkt_dev->result); 703 else 704 seq_printf(seq, "Result: Idle\n"); 705 706 return 0; 707 } 708 709 710 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, 711 __u32 *num) 712 { 713 int i = 0; 714 *num = 0; 715 716 for (; i < maxlen; i++) { 717 char c; 718 *num <<= 4; 719 if (get_user(c, &user_buffer[i])) 720 return -EFAULT; 721 if ((c >= '0') && (c <= '9')) 722 *num |= c - '0'; 723 else if ((c >= 'a') && (c <= 'f')) 724 *num |= c - 'a' + 10; 725 else if ((c >= 'A') && (c <= 'F')) 726 *num |= c - 'A' + 10; 727 else 728 break; 729 } 730 return i; 731 } 732 733 static int count_trail_chars(const char __user * user_buffer, 734 unsigned int maxlen) 735 { 736 int i; 737 738 for (i = 0; i < maxlen; i++) { 739 char c; 740 if (get_user(c, &user_buffer[i])) 741 return -EFAULT; 742 switch (c) { 743 case '\"': 744 case '\n': 745 case '\r': 746 case '\t': 747 case ' ': 748 case '=': 749 break; 750 default: 751 goto done; 752 } 753 } 754 done: 755 return i; 756 } 757 758 static unsigned long num_arg(const char __user * user_buffer, 759 unsigned long maxlen, unsigned long *num) 760 { 761 int i = 0; 762 *num = 0; 763 764 for (; i < maxlen; i++) { 765 char c; 766 if (get_user(c, &user_buffer[i])) 767 return -EFAULT; 768 if ((c >= '0') && (c <= '9')) { 769 *num *= 10; 770 *num += c - '0'; 771 } else 772 break; 773 } 774 return i; 775 } 776 777 static int strn_len(const char __user * user_buffer, unsigned int maxlen) 778 { 779 int i = 0; 780 781 for (; i < maxlen; i++) { 782 char c; 783 if (get_user(c, &user_buffer[i])) 784 return -EFAULT; 785 switch (c) { 786 case '\"': 787 case '\n': 788 case '\r': 789 case '\t': 790 case ' ': 791 goto done_str; 792 break; 793 default: 794 break; 795 } 796 } 797 done_str: 798 return i; 799 } 800 801 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) 802 { 803 unsigned n = 0; 804 char c; 805 ssize_t i = 0; 806 int len; 807 808 pkt_dev->nr_labels = 0; 809 do { 810 __u32 tmp; 811 len = hex32_arg(&buffer[i], 8, &tmp); 812 if (len <= 0) 813 return len; 814 pkt_dev->labels[n] = htonl(tmp); 815 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 816 pkt_dev->flags |= F_MPLS_RND; 817 i += len; 818 if (get_user(c, &buffer[i])) 819 return -EFAULT; 820 i++; 821 n++; 822 if (n >= MAX_MPLS_LABELS) 823 return -E2BIG; 824 } while (c == ','); 825 826 pkt_dev->nr_labels = n; 827 return i; 828 } 829 830 static ssize_t pktgen_if_write(struct file *file, 831 const char __user * user_buffer, size_t count, 832 loff_t * offset) 833 { 834 struct seq_file *seq = (struct seq_file *)file->private_data; 835 struct pktgen_dev *pkt_dev = seq->private; 836 int i = 0, max, len; 837 char name[16], valstr[32]; 838 unsigned long value = 0; 839 char *pg_result = NULL; 840 int tmp = 0; 841 char buf[128]; 842 843 pg_result = &(pkt_dev->result[0]); 844 845 if (count < 1) { 846 printk(KERN_WARNING "pktgen: wrong command format\n"); 847 return -EINVAL; 848 } 849 850 max = count - i; 851 tmp = count_trail_chars(&user_buffer[i], max); 852 if (tmp < 0) { 853 printk(KERN_WARNING "pktgen: illegal format\n"); 854 return tmp; 855 } 856 i += tmp; 857 858 /* Read variable name */ 859 860 len = strn_len(&user_buffer[i], sizeof(name) - 1); 861 if (len < 0) 862 return len; 863 864 memset(name, 0, sizeof(name)); 865 if (copy_from_user(name, &user_buffer[i], len)) 866 return -EFAULT; 867 i += len; 868 869 max = count - i; 870 len = count_trail_chars(&user_buffer[i], max); 871 if (len < 0) 872 return len; 873 874 i += len; 875 876 if (debug) { 877 char tb[count + 1]; 878 if (copy_from_user(tb, user_buffer, count)) 879 return -EFAULT; 880 tb[count] = 0; 881 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name, 882 (unsigned long)count, tb); 883 } 884 885 if (!strcmp(name, "min_pkt_size")) { 886 len = num_arg(&user_buffer[i], 10, &value); 887 if (len < 0) 888 return len; 889 890 i += len; 891 if (value < 14 + 20 + 8) 892 value = 14 + 20 + 8; 893 if (value != pkt_dev->min_pkt_size) { 894 pkt_dev->min_pkt_size = value; 895 pkt_dev->cur_pkt_size = value; 896 } 897 sprintf(pg_result, "OK: min_pkt_size=%u", 898 pkt_dev->min_pkt_size); 899 return count; 900 } 901 902 if (!strcmp(name, "max_pkt_size")) { 903 len = num_arg(&user_buffer[i], 10, &value); 904 if (len < 0) 905 return len; 906 907 i += len; 908 if (value < 14 + 20 + 8) 909 value = 14 + 20 + 8; 910 if (value != pkt_dev->max_pkt_size) { 911 pkt_dev->max_pkt_size = value; 912 pkt_dev->cur_pkt_size = value; 913 } 914 sprintf(pg_result, "OK: max_pkt_size=%u", 915 pkt_dev->max_pkt_size); 916 return count; 917 } 918 919 /* Shortcut for min = max */ 920 921 if (!strcmp(name, "pkt_size")) { 922 len = num_arg(&user_buffer[i], 10, &value); 923 if (len < 0) 924 return len; 925 926 i += len; 927 if (value < 14 + 20 + 8) 928 value = 14 + 20 + 8; 929 if (value != pkt_dev->min_pkt_size) { 930 pkt_dev->min_pkt_size = value; 931 pkt_dev->max_pkt_size = value; 932 pkt_dev->cur_pkt_size = value; 933 } 934 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 935 return count; 936 } 937 938 if (!strcmp(name, "debug")) { 939 len = num_arg(&user_buffer[i], 10, &value); 940 if (len < 0) 941 return len; 942 943 i += len; 944 debug = value; 945 sprintf(pg_result, "OK: debug=%u", debug); 946 return count; 947 } 948 949 if (!strcmp(name, "frags")) { 950 len = num_arg(&user_buffer[i], 10, &value); 951 if (len < 0) 952 return len; 953 954 i += len; 955 pkt_dev->nfrags = value; 956 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 957 return count; 958 } 959 if (!strcmp(name, "delay")) { 960 len = num_arg(&user_buffer[i], 10, &value); 961 if (len < 0) 962 return len; 963 964 i += len; 965 if (value == 0x7FFFFFFF) 966 pkt_dev->delay = ULLONG_MAX; 967 else 968 pkt_dev->delay = (u64)value * NSEC_PER_USEC; 969 970 sprintf(pg_result, "OK: delay=%llu", 971 (unsigned long long) pkt_dev->delay); 972 return count; 973 } 974 if (!strcmp(name, "udp_src_min")) { 975 len = num_arg(&user_buffer[i], 10, &value); 976 if (len < 0) 977 return len; 978 979 i += len; 980 if (value != pkt_dev->udp_src_min) { 981 pkt_dev->udp_src_min = value; 982 pkt_dev->cur_udp_src = value; 983 } 984 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 985 return count; 986 } 987 if (!strcmp(name, "udp_dst_min")) { 988 len = num_arg(&user_buffer[i], 10, &value); 989 if (len < 0) 990 return len; 991 992 i += len; 993 if (value != pkt_dev->udp_dst_min) { 994 pkt_dev->udp_dst_min = value; 995 pkt_dev->cur_udp_dst = value; 996 } 997 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 998 return count; 999 } 1000 if (!strcmp(name, "udp_src_max")) { 1001 len = num_arg(&user_buffer[i], 10, &value); 1002 if (len < 0) 1003 return len; 1004 1005 i += len; 1006 if (value != pkt_dev->udp_src_max) { 1007 pkt_dev->udp_src_max = value; 1008 pkt_dev->cur_udp_src = value; 1009 } 1010 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 1011 return count; 1012 } 1013 if (!strcmp(name, "udp_dst_max")) { 1014 len = num_arg(&user_buffer[i], 10, &value); 1015 if (len < 0) 1016 return len; 1017 1018 i += len; 1019 if (value != pkt_dev->udp_dst_max) { 1020 pkt_dev->udp_dst_max = value; 1021 pkt_dev->cur_udp_dst = value; 1022 } 1023 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1024 return count; 1025 } 1026 if (!strcmp(name, "clone_skb")) { 1027 len = num_arg(&user_buffer[i], 10, &value); 1028 if (len < 0) 1029 return len; 1030 1031 i += len; 1032 pkt_dev->clone_skb = value; 1033 1034 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1035 return count; 1036 } 1037 if (!strcmp(name, "count")) { 1038 len = num_arg(&user_buffer[i], 10, &value); 1039 if (len < 0) 1040 return len; 1041 1042 i += len; 1043 pkt_dev->count = value; 1044 sprintf(pg_result, "OK: count=%llu", 1045 (unsigned long long)pkt_dev->count); 1046 return count; 1047 } 1048 if (!strcmp(name, "src_mac_count")) { 1049 len = num_arg(&user_buffer[i], 10, &value); 1050 if (len < 0) 1051 return len; 1052 1053 i += len; 1054 if (pkt_dev->src_mac_count != value) { 1055 pkt_dev->src_mac_count = value; 1056 pkt_dev->cur_src_mac_offset = 0; 1057 } 1058 sprintf(pg_result, "OK: src_mac_count=%d", 1059 pkt_dev->src_mac_count); 1060 return count; 1061 } 1062 if (!strcmp(name, "dst_mac_count")) { 1063 len = num_arg(&user_buffer[i], 10, &value); 1064 if (len < 0) 1065 return len; 1066 1067 i += len; 1068 if (pkt_dev->dst_mac_count != value) { 1069 pkt_dev->dst_mac_count = value; 1070 pkt_dev->cur_dst_mac_offset = 0; 1071 } 1072 sprintf(pg_result, "OK: dst_mac_count=%d", 1073 pkt_dev->dst_mac_count); 1074 return count; 1075 } 1076 if (!strcmp(name, "flag")) { 1077 char f[32]; 1078 memset(f, 0, 32); 1079 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1080 if (len < 0) 1081 return len; 1082 1083 if (copy_from_user(f, &user_buffer[i], len)) 1084 return -EFAULT; 1085 i += len; 1086 if (strcmp(f, "IPSRC_RND") == 0) 1087 pkt_dev->flags |= F_IPSRC_RND; 1088 1089 else if (strcmp(f, "!IPSRC_RND") == 0) 1090 pkt_dev->flags &= ~F_IPSRC_RND; 1091 1092 else if (strcmp(f, "TXSIZE_RND") == 0) 1093 pkt_dev->flags |= F_TXSIZE_RND; 1094 1095 else if (strcmp(f, "!TXSIZE_RND") == 0) 1096 pkt_dev->flags &= ~F_TXSIZE_RND; 1097 1098 else if (strcmp(f, "IPDST_RND") == 0) 1099 pkt_dev->flags |= F_IPDST_RND; 1100 1101 else if (strcmp(f, "!IPDST_RND") == 0) 1102 pkt_dev->flags &= ~F_IPDST_RND; 1103 1104 else if (strcmp(f, "UDPSRC_RND") == 0) 1105 pkt_dev->flags |= F_UDPSRC_RND; 1106 1107 else if (strcmp(f, "!UDPSRC_RND") == 0) 1108 pkt_dev->flags &= ~F_UDPSRC_RND; 1109 1110 else if (strcmp(f, "UDPDST_RND") == 0) 1111 pkt_dev->flags |= F_UDPDST_RND; 1112 1113 else if (strcmp(f, "!UDPDST_RND") == 0) 1114 pkt_dev->flags &= ~F_UDPDST_RND; 1115 1116 else if (strcmp(f, "MACSRC_RND") == 0) 1117 pkt_dev->flags |= F_MACSRC_RND; 1118 1119 else if (strcmp(f, "!MACSRC_RND") == 0) 1120 pkt_dev->flags &= ~F_MACSRC_RND; 1121 1122 else if (strcmp(f, "MACDST_RND") == 0) 1123 pkt_dev->flags |= F_MACDST_RND; 1124 1125 else if (strcmp(f, "!MACDST_RND") == 0) 1126 pkt_dev->flags &= ~F_MACDST_RND; 1127 1128 else if (strcmp(f, "MPLS_RND") == 0) 1129 pkt_dev->flags |= F_MPLS_RND; 1130 1131 else if (strcmp(f, "!MPLS_RND") == 0) 1132 pkt_dev->flags &= ~F_MPLS_RND; 1133 1134 else if (strcmp(f, "VID_RND") == 0) 1135 pkt_dev->flags |= F_VID_RND; 1136 1137 else if (strcmp(f, "!VID_RND") == 0) 1138 pkt_dev->flags &= ~F_VID_RND; 1139 1140 else if (strcmp(f, "SVID_RND") == 0) 1141 pkt_dev->flags |= F_SVID_RND; 1142 1143 else if (strcmp(f, "!SVID_RND") == 0) 1144 pkt_dev->flags &= ~F_SVID_RND; 1145 1146 else if (strcmp(f, "FLOW_SEQ") == 0) 1147 pkt_dev->flags |= F_FLOW_SEQ; 1148 1149 else if (strcmp(f, "QUEUE_MAP_RND") == 0) 1150 pkt_dev->flags |= F_QUEUE_MAP_RND; 1151 1152 else if (strcmp(f, "!QUEUE_MAP_RND") == 0) 1153 pkt_dev->flags &= ~F_QUEUE_MAP_RND; 1154 1155 else if (strcmp(f, "QUEUE_MAP_CPU") == 0) 1156 pkt_dev->flags |= F_QUEUE_MAP_CPU; 1157 1158 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0) 1159 pkt_dev->flags &= ~F_QUEUE_MAP_CPU; 1160 #ifdef CONFIG_XFRM 1161 else if (strcmp(f, "IPSEC") == 0) 1162 pkt_dev->flags |= F_IPSEC_ON; 1163 #endif 1164 1165 else if (strcmp(f, "!IPV6") == 0) 1166 pkt_dev->flags &= ~F_IPV6; 1167 1168 else { 1169 sprintf(pg_result, 1170 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1171 f, 1172 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1173 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC\n"); 1174 return count; 1175 } 1176 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1177 return count; 1178 } 1179 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1180 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1181 if (len < 0) 1182 return len; 1183 1184 if (copy_from_user(buf, &user_buffer[i], len)) 1185 return -EFAULT; 1186 buf[len] = 0; 1187 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1188 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1189 strncpy(pkt_dev->dst_min, buf, len); 1190 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1191 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1192 } 1193 if (debug) 1194 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n", 1195 pkt_dev->dst_min); 1196 i += len; 1197 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1198 return count; 1199 } 1200 if (!strcmp(name, "dst_max")) { 1201 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1202 if (len < 0) 1203 return len; 1204 1205 1206 if (copy_from_user(buf, &user_buffer[i], len)) 1207 return -EFAULT; 1208 1209 buf[len] = 0; 1210 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1211 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1212 strncpy(pkt_dev->dst_max, buf, len); 1213 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1214 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1215 } 1216 if (debug) 1217 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n", 1218 pkt_dev->dst_max); 1219 i += len; 1220 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1221 return count; 1222 } 1223 if (!strcmp(name, "dst6")) { 1224 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1225 if (len < 0) 1226 return len; 1227 1228 pkt_dev->flags |= F_IPV6; 1229 1230 if (copy_from_user(buf, &user_buffer[i], len)) 1231 return -EFAULT; 1232 buf[len] = 0; 1233 1234 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1235 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1236 1237 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr); 1238 1239 if (debug) 1240 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf); 1241 1242 i += len; 1243 sprintf(pg_result, "OK: dst6=%s", buf); 1244 return count; 1245 } 1246 if (!strcmp(name, "dst6_min")) { 1247 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1248 if (len < 0) 1249 return len; 1250 1251 pkt_dev->flags |= F_IPV6; 1252 1253 if (copy_from_user(buf, &user_buffer[i], len)) 1254 return -EFAULT; 1255 buf[len] = 0; 1256 1257 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1258 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1259 1260 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, 1261 &pkt_dev->min_in6_daddr); 1262 if (debug) 1263 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf); 1264 1265 i += len; 1266 sprintf(pg_result, "OK: dst6_min=%s", buf); 1267 return count; 1268 } 1269 if (!strcmp(name, "dst6_max")) { 1270 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1271 if (len < 0) 1272 return len; 1273 1274 pkt_dev->flags |= F_IPV6; 1275 1276 if (copy_from_user(buf, &user_buffer[i], len)) 1277 return -EFAULT; 1278 buf[len] = 0; 1279 1280 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1281 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1282 1283 if (debug) 1284 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf); 1285 1286 i += len; 1287 sprintf(pg_result, "OK: dst6_max=%s", buf); 1288 return count; 1289 } 1290 if (!strcmp(name, "src6")) { 1291 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1292 if (len < 0) 1293 return len; 1294 1295 pkt_dev->flags |= F_IPV6; 1296 1297 if (copy_from_user(buf, &user_buffer[i], len)) 1298 return -EFAULT; 1299 buf[len] = 0; 1300 1301 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1302 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1303 1304 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr); 1305 1306 if (debug) 1307 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf); 1308 1309 i += len; 1310 sprintf(pg_result, "OK: src6=%s", buf); 1311 return count; 1312 } 1313 if (!strcmp(name, "src_min")) { 1314 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1315 if (len < 0) 1316 return len; 1317 1318 if (copy_from_user(buf, &user_buffer[i], len)) 1319 return -EFAULT; 1320 buf[len] = 0; 1321 if (strcmp(buf, pkt_dev->src_min) != 0) { 1322 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1323 strncpy(pkt_dev->src_min, buf, len); 1324 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1325 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1326 } 1327 if (debug) 1328 printk(KERN_DEBUG "pktgen: src_min set to: %s\n", 1329 pkt_dev->src_min); 1330 i += len; 1331 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1332 return count; 1333 } 1334 if (!strcmp(name, "src_max")) { 1335 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1336 if (len < 0) 1337 return len; 1338 1339 if (copy_from_user(buf, &user_buffer[i], len)) 1340 return -EFAULT; 1341 buf[len] = 0; 1342 if (strcmp(buf, pkt_dev->src_max) != 0) { 1343 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1344 strncpy(pkt_dev->src_max, buf, len); 1345 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1346 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1347 } 1348 if (debug) 1349 printk(KERN_DEBUG "pktgen: src_max set to: %s\n", 1350 pkt_dev->src_max); 1351 i += len; 1352 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1353 return count; 1354 } 1355 if (!strcmp(name, "dst_mac")) { 1356 char *v = valstr; 1357 unsigned char old_dmac[ETH_ALEN]; 1358 unsigned char *m = pkt_dev->dst_mac; 1359 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN); 1360 1361 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1362 if (len < 0) 1363 return len; 1364 1365 memset(valstr, 0, sizeof(valstr)); 1366 if (copy_from_user(valstr, &user_buffer[i], len)) 1367 return -EFAULT; 1368 i += len; 1369 1370 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) { 1371 if (*v >= '0' && *v <= '9') { 1372 *m *= 16; 1373 *m += *v - '0'; 1374 } 1375 if (*v >= 'A' && *v <= 'F') { 1376 *m *= 16; 1377 *m += *v - 'A' + 10; 1378 } 1379 if (*v >= 'a' && *v <= 'f') { 1380 *m *= 16; 1381 *m += *v - 'a' + 10; 1382 } 1383 if (*v == ':') { 1384 m++; 1385 *m = 0; 1386 } 1387 } 1388 1389 /* Set up Dest MAC */ 1390 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac)) 1391 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 1392 1393 sprintf(pg_result, "OK: dstmac"); 1394 return count; 1395 } 1396 if (!strcmp(name, "src_mac")) { 1397 char *v = valstr; 1398 unsigned char old_smac[ETH_ALEN]; 1399 unsigned char *m = pkt_dev->src_mac; 1400 1401 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN); 1402 1403 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1404 if (len < 0) 1405 return len; 1406 1407 memset(valstr, 0, sizeof(valstr)); 1408 if (copy_from_user(valstr, &user_buffer[i], len)) 1409 return -EFAULT; 1410 i += len; 1411 1412 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) { 1413 if (*v >= '0' && *v <= '9') { 1414 *m *= 16; 1415 *m += *v - '0'; 1416 } 1417 if (*v >= 'A' && *v <= 'F') { 1418 *m *= 16; 1419 *m += *v - 'A' + 10; 1420 } 1421 if (*v >= 'a' && *v <= 'f') { 1422 *m *= 16; 1423 *m += *v - 'a' + 10; 1424 } 1425 if (*v == ':') { 1426 m++; 1427 *m = 0; 1428 } 1429 } 1430 1431 /* Set up Src MAC */ 1432 if (compare_ether_addr(old_smac, pkt_dev->src_mac)) 1433 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN); 1434 1435 sprintf(pg_result, "OK: srcmac"); 1436 return count; 1437 } 1438 1439 if (!strcmp(name, "clear_counters")) { 1440 pktgen_clear_counters(pkt_dev); 1441 sprintf(pg_result, "OK: Clearing counters.\n"); 1442 return count; 1443 } 1444 1445 if (!strcmp(name, "flows")) { 1446 len = num_arg(&user_buffer[i], 10, &value); 1447 if (len < 0) 1448 return len; 1449 1450 i += len; 1451 if (value > MAX_CFLOWS) 1452 value = MAX_CFLOWS; 1453 1454 pkt_dev->cflows = value; 1455 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1456 return count; 1457 } 1458 1459 if (!strcmp(name, "flowlen")) { 1460 len = num_arg(&user_buffer[i], 10, &value); 1461 if (len < 0) 1462 return len; 1463 1464 i += len; 1465 pkt_dev->lflow = value; 1466 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1467 return count; 1468 } 1469 1470 if (!strcmp(name, "queue_map_min")) { 1471 len = num_arg(&user_buffer[i], 5, &value); 1472 if (len < 0) 1473 return len; 1474 1475 i += len; 1476 pkt_dev->queue_map_min = value; 1477 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1478 return count; 1479 } 1480 1481 if (!strcmp(name, "queue_map_max")) { 1482 len = num_arg(&user_buffer[i], 5, &value); 1483 if (len < 0) 1484 return len; 1485 1486 i += len; 1487 pkt_dev->queue_map_max = value; 1488 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1489 return count; 1490 } 1491 1492 if (!strcmp(name, "mpls")) { 1493 unsigned n, cnt; 1494 1495 len = get_labels(&user_buffer[i], pkt_dev); 1496 if (len < 0) 1497 return len; 1498 i += len; 1499 cnt = sprintf(pg_result, "OK: mpls="); 1500 for (n = 0; n < pkt_dev->nr_labels; n++) 1501 cnt += sprintf(pg_result + cnt, 1502 "%08x%s", ntohl(pkt_dev->labels[n]), 1503 n == pkt_dev->nr_labels-1 ? "" : ","); 1504 1505 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1506 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1507 pkt_dev->svlan_id = 0xffff; 1508 1509 if (debug) 1510 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n"); 1511 } 1512 return count; 1513 } 1514 1515 if (!strcmp(name, "vlan_id")) { 1516 len = num_arg(&user_buffer[i], 4, &value); 1517 if (len < 0) 1518 return len; 1519 1520 i += len; 1521 if (value <= 4095) { 1522 pkt_dev->vlan_id = value; /* turn on VLAN */ 1523 1524 if (debug) 1525 printk(KERN_DEBUG "pktgen: VLAN turned on\n"); 1526 1527 if (debug && pkt_dev->nr_labels) 1528 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1529 1530 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1531 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1532 } else { 1533 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1534 pkt_dev->svlan_id = 0xffff; 1535 1536 if (debug) 1537 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1538 } 1539 return count; 1540 } 1541 1542 if (!strcmp(name, "vlan_p")) { 1543 len = num_arg(&user_buffer[i], 1, &value); 1544 if (len < 0) 1545 return len; 1546 1547 i += len; 1548 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1549 pkt_dev->vlan_p = value; 1550 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1551 } else { 1552 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1553 } 1554 return count; 1555 } 1556 1557 if (!strcmp(name, "vlan_cfi")) { 1558 len = num_arg(&user_buffer[i], 1, &value); 1559 if (len < 0) 1560 return len; 1561 1562 i += len; 1563 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1564 pkt_dev->vlan_cfi = value; 1565 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1566 } else { 1567 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1568 } 1569 return count; 1570 } 1571 1572 if (!strcmp(name, "svlan_id")) { 1573 len = num_arg(&user_buffer[i], 4, &value); 1574 if (len < 0) 1575 return len; 1576 1577 i += len; 1578 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1579 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1580 1581 if (debug) 1582 printk(KERN_DEBUG "pktgen: SVLAN turned on\n"); 1583 1584 if (debug && pkt_dev->nr_labels) 1585 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1586 1587 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1588 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1589 } else { 1590 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1591 pkt_dev->svlan_id = 0xffff; 1592 1593 if (debug) 1594 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1595 } 1596 return count; 1597 } 1598 1599 if (!strcmp(name, "svlan_p")) { 1600 len = num_arg(&user_buffer[i], 1, &value); 1601 if (len < 0) 1602 return len; 1603 1604 i += len; 1605 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1606 pkt_dev->svlan_p = value; 1607 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1608 } else { 1609 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1610 } 1611 return count; 1612 } 1613 1614 if (!strcmp(name, "svlan_cfi")) { 1615 len = num_arg(&user_buffer[i], 1, &value); 1616 if (len < 0) 1617 return len; 1618 1619 i += len; 1620 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1621 pkt_dev->svlan_cfi = value; 1622 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1623 } else { 1624 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1625 } 1626 return count; 1627 } 1628 1629 if (!strcmp(name, "tos")) { 1630 __u32 tmp_value = 0; 1631 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1632 if (len < 0) 1633 return len; 1634 1635 i += len; 1636 if (len == 2) { 1637 pkt_dev->tos = tmp_value; 1638 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1639 } else { 1640 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1641 } 1642 return count; 1643 } 1644 1645 if (!strcmp(name, "traffic_class")) { 1646 __u32 tmp_value = 0; 1647 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1648 if (len < 0) 1649 return len; 1650 1651 i += len; 1652 if (len == 2) { 1653 pkt_dev->traffic_class = tmp_value; 1654 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1655 } else { 1656 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1657 } 1658 return count; 1659 } 1660 1661 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1662 return -EINVAL; 1663 } 1664 1665 static int pktgen_if_open(struct inode *inode, struct file *file) 1666 { 1667 return single_open(file, pktgen_if_show, PDE(inode)->data); 1668 } 1669 1670 static const struct file_operations pktgen_if_fops = { 1671 .owner = THIS_MODULE, 1672 .open = pktgen_if_open, 1673 .read = seq_read, 1674 .llseek = seq_lseek, 1675 .write = pktgen_if_write, 1676 .release = single_release, 1677 }; 1678 1679 static int pktgen_thread_show(struct seq_file *seq, void *v) 1680 { 1681 struct pktgen_thread *t = seq->private; 1682 const struct pktgen_dev *pkt_dev; 1683 1684 BUG_ON(!t); 1685 1686 seq_printf(seq, "Running: "); 1687 1688 if_lock(t); 1689 list_for_each_entry(pkt_dev, &t->if_list, list) 1690 if (pkt_dev->running) 1691 seq_printf(seq, "%s ", pkt_dev->odev->name); 1692 1693 seq_printf(seq, "\nStopped: "); 1694 1695 list_for_each_entry(pkt_dev, &t->if_list, list) 1696 if (!pkt_dev->running) 1697 seq_printf(seq, "%s ", pkt_dev->odev->name); 1698 1699 if (t->result[0]) 1700 seq_printf(seq, "\nResult: %s\n", t->result); 1701 else 1702 seq_printf(seq, "\nResult: NA\n"); 1703 1704 if_unlock(t); 1705 1706 return 0; 1707 } 1708 1709 static ssize_t pktgen_thread_write(struct file *file, 1710 const char __user * user_buffer, 1711 size_t count, loff_t * offset) 1712 { 1713 struct seq_file *seq = (struct seq_file *)file->private_data; 1714 struct pktgen_thread *t = seq->private; 1715 int i = 0, max, len, ret; 1716 char name[40]; 1717 char *pg_result; 1718 1719 if (count < 1) { 1720 // sprintf(pg_result, "Wrong command format"); 1721 return -EINVAL; 1722 } 1723 1724 max = count - i; 1725 len = count_trail_chars(&user_buffer[i], max); 1726 if (len < 0) 1727 return len; 1728 1729 i += len; 1730 1731 /* Read variable name */ 1732 1733 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1734 if (len < 0) 1735 return len; 1736 1737 memset(name, 0, sizeof(name)); 1738 if (copy_from_user(name, &user_buffer[i], len)) 1739 return -EFAULT; 1740 i += len; 1741 1742 max = count - i; 1743 len = count_trail_chars(&user_buffer[i], max); 1744 if (len < 0) 1745 return len; 1746 1747 i += len; 1748 1749 if (debug) 1750 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n", 1751 name, (unsigned long)count); 1752 1753 if (!t) { 1754 printk(KERN_ERR "pktgen: ERROR: No thread\n"); 1755 ret = -EINVAL; 1756 goto out; 1757 } 1758 1759 pg_result = &(t->result[0]); 1760 1761 if (!strcmp(name, "add_device")) { 1762 char f[32]; 1763 memset(f, 0, 32); 1764 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1765 if (len < 0) { 1766 ret = len; 1767 goto out; 1768 } 1769 if (copy_from_user(f, &user_buffer[i], len)) 1770 return -EFAULT; 1771 i += len; 1772 mutex_lock(&pktgen_thread_lock); 1773 pktgen_add_device(t, f); 1774 mutex_unlock(&pktgen_thread_lock); 1775 ret = count; 1776 sprintf(pg_result, "OK: add_device=%s", f); 1777 goto out; 1778 } 1779 1780 if (!strcmp(name, "rem_device_all")) { 1781 mutex_lock(&pktgen_thread_lock); 1782 t->control |= T_REMDEVALL; 1783 mutex_unlock(&pktgen_thread_lock); 1784 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1785 ret = count; 1786 sprintf(pg_result, "OK: rem_device_all"); 1787 goto out; 1788 } 1789 1790 if (!strcmp(name, "max_before_softirq")) { 1791 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1792 ret = count; 1793 goto out; 1794 } 1795 1796 ret = -EINVAL; 1797 out: 1798 return ret; 1799 } 1800 1801 static int pktgen_thread_open(struct inode *inode, struct file *file) 1802 { 1803 return single_open(file, pktgen_thread_show, PDE(inode)->data); 1804 } 1805 1806 static const struct file_operations pktgen_thread_fops = { 1807 .owner = THIS_MODULE, 1808 .open = pktgen_thread_open, 1809 .read = seq_read, 1810 .llseek = seq_lseek, 1811 .write = pktgen_thread_write, 1812 .release = single_release, 1813 }; 1814 1815 /* Think find or remove for NN */ 1816 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove) 1817 { 1818 struct pktgen_thread *t; 1819 struct pktgen_dev *pkt_dev = NULL; 1820 1821 list_for_each_entry(t, &pktgen_threads, th_list) { 1822 pkt_dev = pktgen_find_dev(t, ifname); 1823 if (pkt_dev) { 1824 if (remove) { 1825 if_lock(t); 1826 pkt_dev->removal_mark = 1; 1827 t->control |= T_REMDEV; 1828 if_unlock(t); 1829 } 1830 break; 1831 } 1832 } 1833 return pkt_dev; 1834 } 1835 1836 /* 1837 * mark a device for removal 1838 */ 1839 static void pktgen_mark_device(const char *ifname) 1840 { 1841 struct pktgen_dev *pkt_dev = NULL; 1842 const int max_tries = 10, msec_per_try = 125; 1843 int i = 0; 1844 1845 mutex_lock(&pktgen_thread_lock); 1846 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname); 1847 1848 while (1) { 1849 1850 pkt_dev = __pktgen_NN_threads(ifname, REMOVE); 1851 if (pkt_dev == NULL) 1852 break; /* success */ 1853 1854 mutex_unlock(&pktgen_thread_lock); 1855 pr_debug("pktgen: pktgen_mark_device waiting for %s " 1856 "to disappear....\n", ifname); 1857 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1858 mutex_lock(&pktgen_thread_lock); 1859 1860 if (++i >= max_tries) { 1861 printk(KERN_ERR "pktgen_mark_device: timed out after " 1862 "waiting %d msec for device %s to be removed\n", 1863 msec_per_try * i, ifname); 1864 break; 1865 } 1866 1867 } 1868 1869 mutex_unlock(&pktgen_thread_lock); 1870 } 1871 1872 static void pktgen_change_name(struct net_device *dev) 1873 { 1874 struct pktgen_thread *t; 1875 1876 list_for_each_entry(t, &pktgen_threads, th_list) { 1877 struct pktgen_dev *pkt_dev; 1878 1879 list_for_each_entry(pkt_dev, &t->if_list, list) { 1880 if (pkt_dev->odev != dev) 1881 continue; 1882 1883 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 1884 1885 pkt_dev->entry = proc_create_data(dev->name, 0600, 1886 pg_proc_dir, 1887 &pktgen_if_fops, 1888 pkt_dev); 1889 if (!pkt_dev->entry) 1890 printk(KERN_ERR "pktgen: can't move proc " 1891 " entry for '%s'\n", dev->name); 1892 break; 1893 } 1894 } 1895 } 1896 1897 static int pktgen_device_event(struct notifier_block *unused, 1898 unsigned long event, void *ptr) 1899 { 1900 struct net_device *dev = ptr; 1901 1902 if (!net_eq(dev_net(dev), &init_net)) 1903 return NOTIFY_DONE; 1904 1905 /* It is OK that we do not hold the group lock right now, 1906 * as we run under the RTNL lock. 1907 */ 1908 1909 switch (event) { 1910 case NETDEV_CHANGENAME: 1911 pktgen_change_name(dev); 1912 break; 1913 1914 case NETDEV_UNREGISTER: 1915 pktgen_mark_device(dev->name); 1916 break; 1917 } 1918 1919 return NOTIFY_DONE; 1920 } 1921 1922 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev, 1923 const char *ifname) 1924 { 1925 char b[IFNAMSIZ+5]; 1926 int i = 0; 1927 1928 for (i = 0; ifname[i] != '@'; i++) { 1929 if (i == IFNAMSIZ) 1930 break; 1931 1932 b[i] = ifname[i]; 1933 } 1934 b[i] = 0; 1935 1936 return dev_get_by_name(&init_net, b); 1937 } 1938 1939 1940 /* Associate pktgen_dev with a device. */ 1941 1942 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname) 1943 { 1944 struct net_device *odev; 1945 int err; 1946 1947 /* Clean old setups */ 1948 if (pkt_dev->odev) { 1949 dev_put(pkt_dev->odev); 1950 pkt_dev->odev = NULL; 1951 } 1952 1953 odev = pktgen_dev_get_by_name(pkt_dev, ifname); 1954 if (!odev) { 1955 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname); 1956 return -ENODEV; 1957 } 1958 1959 if (odev->type != ARPHRD_ETHER) { 1960 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname); 1961 err = -EINVAL; 1962 } else if (!netif_running(odev)) { 1963 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname); 1964 err = -ENETDOWN; 1965 } else { 1966 pkt_dev->odev = odev; 1967 return 0; 1968 } 1969 1970 dev_put(odev); 1971 return err; 1972 } 1973 1974 /* Read pkt_dev from the interface and set up internal pktgen_dev 1975 * structure to have the right information to create/send packets 1976 */ 1977 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 1978 { 1979 int ntxq; 1980 1981 if (!pkt_dev->odev) { 1982 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in " 1983 "setup_inject.\n"); 1984 sprintf(pkt_dev->result, 1985 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 1986 return; 1987 } 1988 1989 /* make sure that we don't pick a non-existing transmit queue */ 1990 ntxq = pkt_dev->odev->real_num_tx_queues; 1991 1992 if (ntxq <= pkt_dev->queue_map_min) { 1993 printk(KERN_WARNING "pktgen: WARNING: Requested " 1994 "queue_map_min (zero-based) (%d) exceeds valid range " 1995 "[0 - %d] for (%d) queues on %s, resetting\n", 1996 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, 1997 pkt_dev->odev->name); 1998 pkt_dev->queue_map_min = ntxq - 1; 1999 } 2000 if (pkt_dev->queue_map_max >= ntxq) { 2001 printk(KERN_WARNING "pktgen: WARNING: Requested " 2002 "queue_map_max (zero-based) (%d) exceeds valid range " 2003 "[0 - %d] for (%d) queues on %s, resetting\n", 2004 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, 2005 pkt_dev->odev->name); 2006 pkt_dev->queue_map_max = ntxq - 1; 2007 } 2008 2009 /* Default to the interface's mac if not explicitly set. */ 2010 2011 if (is_zero_ether_addr(pkt_dev->src_mac)) 2012 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN); 2013 2014 /* Set up Dest MAC */ 2015 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 2016 2017 /* Set up pkt size */ 2018 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2019 2020 if (pkt_dev->flags & F_IPV6) { 2021 /* 2022 * Skip this automatic address setting until locks or functions 2023 * gets exported 2024 */ 2025 2026 #ifdef NOTNOW 2027 int i, set = 0, err = 1; 2028 struct inet6_dev *idev; 2029 2030 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2031 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2032 set = 1; 2033 break; 2034 } 2035 2036 if (!set) { 2037 2038 /* 2039 * Use linklevel address if unconfigured. 2040 * 2041 * use ipv6_get_lladdr if/when it's get exported 2042 */ 2043 2044 rcu_read_lock(); 2045 idev = __in6_dev_get(pkt_dev->odev); 2046 if (idev) { 2047 struct inet6_ifaddr *ifp; 2048 2049 read_lock_bh(&idev->lock); 2050 for (ifp = idev->addr_list; ifp; 2051 ifp = ifp->if_next) { 2052 if (ifp->scope == IFA_LINK 2053 && !(ifp-> 2054 flags & IFA_F_TENTATIVE)) { 2055 ipv6_addr_copy(&pkt_dev-> 2056 cur_in6_saddr, 2057 &ifp->addr); 2058 err = 0; 2059 break; 2060 } 2061 } 2062 read_unlock_bh(&idev->lock); 2063 } 2064 rcu_read_unlock(); 2065 if (err) 2066 printk(KERN_ERR "pktgen: ERROR: IPv6 link " 2067 "address not availble.\n"); 2068 } 2069 #endif 2070 } else { 2071 pkt_dev->saddr_min = 0; 2072 pkt_dev->saddr_max = 0; 2073 if (strlen(pkt_dev->src_min) == 0) { 2074 2075 struct in_device *in_dev; 2076 2077 rcu_read_lock(); 2078 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2079 if (in_dev) { 2080 if (in_dev->ifa_list) { 2081 pkt_dev->saddr_min = 2082 in_dev->ifa_list->ifa_address; 2083 pkt_dev->saddr_max = pkt_dev->saddr_min; 2084 } 2085 } 2086 rcu_read_unlock(); 2087 } else { 2088 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2089 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2090 } 2091 2092 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2093 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2094 } 2095 /* Initialize current values. */ 2096 pkt_dev->cur_dst_mac_offset = 0; 2097 pkt_dev->cur_src_mac_offset = 0; 2098 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2099 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2100 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2101 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2102 pkt_dev->nflows = 0; 2103 } 2104 2105 2106 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) 2107 { 2108 ktime_t start; 2109 s32 remaining; 2110 struct hrtimer_sleeper t; 2111 2112 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); 2113 hrtimer_set_expires(&t.timer, spin_until); 2114 2115 remaining = ktime_to_us(hrtimer_expires_remaining(&t.timer)); 2116 if (remaining <= 0) 2117 return; 2118 2119 start = ktime_now(); 2120 if (remaining < 100) 2121 udelay(remaining); /* really small just spin */ 2122 else { 2123 /* see do_nanosleep */ 2124 hrtimer_init_sleeper(&t, current); 2125 do { 2126 set_current_state(TASK_INTERRUPTIBLE); 2127 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS); 2128 if (!hrtimer_active(&t.timer)) 2129 t.task = NULL; 2130 2131 if (likely(t.task)) 2132 schedule(); 2133 2134 hrtimer_cancel(&t.timer); 2135 } while (t.task && pkt_dev->running && !signal_pending(current)); 2136 __set_current_state(TASK_RUNNING); 2137 } 2138 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), start)); 2139 } 2140 2141 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2142 { 2143 pkt_dev->pkt_overhead = 0; 2144 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2145 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2146 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2147 } 2148 2149 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) 2150 { 2151 return !!(pkt_dev->flows[flow].flags & F_INIT); 2152 } 2153 2154 static inline int f_pick(struct pktgen_dev *pkt_dev) 2155 { 2156 int flow = pkt_dev->curfl; 2157 2158 if (pkt_dev->flags & F_FLOW_SEQ) { 2159 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2160 /* reset time */ 2161 pkt_dev->flows[flow].count = 0; 2162 pkt_dev->flows[flow].flags = 0; 2163 pkt_dev->curfl += 1; 2164 if (pkt_dev->curfl >= pkt_dev->cflows) 2165 pkt_dev->curfl = 0; /*reset */ 2166 } 2167 } else { 2168 flow = random32() % pkt_dev->cflows; 2169 pkt_dev->curfl = flow; 2170 2171 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2172 pkt_dev->flows[flow].count = 0; 2173 pkt_dev->flows[flow].flags = 0; 2174 } 2175 } 2176 2177 return pkt_dev->curfl; 2178 } 2179 2180 2181 #ifdef CONFIG_XFRM 2182 /* If there was already an IPSEC SA, we keep it as is, else 2183 * we go look for it ... 2184 */ 2185 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2186 { 2187 struct xfrm_state *x = pkt_dev->flows[flow].x; 2188 if (!x) { 2189 /*slow path: we dont already have xfrm_state*/ 2190 x = xfrm_stateonly_find(&init_net, 2191 (xfrm_address_t *)&pkt_dev->cur_daddr, 2192 (xfrm_address_t *)&pkt_dev->cur_saddr, 2193 AF_INET, 2194 pkt_dev->ipsmode, 2195 pkt_dev->ipsproto, 0); 2196 if (x) { 2197 pkt_dev->flows[flow].x = x; 2198 set_pkt_overhead(pkt_dev); 2199 pkt_dev->pkt_overhead += x->props.header_len; 2200 } 2201 2202 } 2203 } 2204 #endif 2205 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2206 { 2207 2208 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2209 pkt_dev->cur_queue_map = smp_processor_id(); 2210 2211 else if (pkt_dev->queue_map_min < pkt_dev->queue_map_max) { 2212 __u16 t; 2213 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2214 t = random32() % 2215 (pkt_dev->queue_map_max - 2216 pkt_dev->queue_map_min + 1) 2217 + pkt_dev->queue_map_min; 2218 } else { 2219 t = pkt_dev->cur_queue_map + 1; 2220 if (t > pkt_dev->queue_map_max) 2221 t = pkt_dev->queue_map_min; 2222 } 2223 pkt_dev->cur_queue_map = t; 2224 } 2225 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2226 } 2227 2228 /* Increment/randomize headers according to flags and current values 2229 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2230 */ 2231 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2232 { 2233 __u32 imn; 2234 __u32 imx; 2235 int flow = 0; 2236 2237 if (pkt_dev->cflows) 2238 flow = f_pick(pkt_dev); 2239 2240 /* Deal with source MAC */ 2241 if (pkt_dev->src_mac_count > 1) { 2242 __u32 mc; 2243 __u32 tmp; 2244 2245 if (pkt_dev->flags & F_MACSRC_RND) 2246 mc = random32() % pkt_dev->src_mac_count; 2247 else { 2248 mc = pkt_dev->cur_src_mac_offset++; 2249 if (pkt_dev->cur_src_mac_offset >= 2250 pkt_dev->src_mac_count) 2251 pkt_dev->cur_src_mac_offset = 0; 2252 } 2253 2254 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2255 pkt_dev->hh[11] = tmp; 2256 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2257 pkt_dev->hh[10] = tmp; 2258 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2259 pkt_dev->hh[9] = tmp; 2260 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2261 pkt_dev->hh[8] = tmp; 2262 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2263 pkt_dev->hh[7] = tmp; 2264 } 2265 2266 /* Deal with Destination MAC */ 2267 if (pkt_dev->dst_mac_count > 1) { 2268 __u32 mc; 2269 __u32 tmp; 2270 2271 if (pkt_dev->flags & F_MACDST_RND) 2272 mc = random32() % pkt_dev->dst_mac_count; 2273 2274 else { 2275 mc = pkt_dev->cur_dst_mac_offset++; 2276 if (pkt_dev->cur_dst_mac_offset >= 2277 pkt_dev->dst_mac_count) { 2278 pkt_dev->cur_dst_mac_offset = 0; 2279 } 2280 } 2281 2282 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2283 pkt_dev->hh[5] = tmp; 2284 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2285 pkt_dev->hh[4] = tmp; 2286 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2287 pkt_dev->hh[3] = tmp; 2288 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2289 pkt_dev->hh[2] = tmp; 2290 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2291 pkt_dev->hh[1] = tmp; 2292 } 2293 2294 if (pkt_dev->flags & F_MPLS_RND) { 2295 unsigned i; 2296 for (i = 0; i < pkt_dev->nr_labels; i++) 2297 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2298 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2299 ((__force __be32)random32() & 2300 htonl(0x000fffff)); 2301 } 2302 2303 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2304 pkt_dev->vlan_id = random32() & (4096-1); 2305 } 2306 2307 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2308 pkt_dev->svlan_id = random32() & (4096 - 1); 2309 } 2310 2311 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2312 if (pkt_dev->flags & F_UDPSRC_RND) 2313 pkt_dev->cur_udp_src = random32() % 2314 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2315 + pkt_dev->udp_src_min; 2316 2317 else { 2318 pkt_dev->cur_udp_src++; 2319 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2320 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2321 } 2322 } 2323 2324 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2325 if (pkt_dev->flags & F_UDPDST_RND) { 2326 pkt_dev->cur_udp_dst = random32() % 2327 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2328 + pkt_dev->udp_dst_min; 2329 } else { 2330 pkt_dev->cur_udp_dst++; 2331 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2332 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2333 } 2334 } 2335 2336 if (!(pkt_dev->flags & F_IPV6)) { 2337 2338 imn = ntohl(pkt_dev->saddr_min); 2339 imx = ntohl(pkt_dev->saddr_max); 2340 if (imn < imx) { 2341 __u32 t; 2342 if (pkt_dev->flags & F_IPSRC_RND) 2343 t = random32() % (imx - imn) + imn; 2344 else { 2345 t = ntohl(pkt_dev->cur_saddr); 2346 t++; 2347 if (t > imx) 2348 t = imn; 2349 2350 } 2351 pkt_dev->cur_saddr = htonl(t); 2352 } 2353 2354 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2355 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2356 } else { 2357 imn = ntohl(pkt_dev->daddr_min); 2358 imx = ntohl(pkt_dev->daddr_max); 2359 if (imn < imx) { 2360 __u32 t; 2361 __be32 s; 2362 if (pkt_dev->flags & F_IPDST_RND) { 2363 2364 t = random32() % (imx - imn) + imn; 2365 s = htonl(t); 2366 2367 while (ipv4_is_loopback(s) || 2368 ipv4_is_multicast(s) || 2369 ipv4_is_lbcast(s) || 2370 ipv4_is_zeronet(s) || 2371 ipv4_is_local_multicast(s)) { 2372 t = random32() % (imx - imn) + imn; 2373 s = htonl(t); 2374 } 2375 pkt_dev->cur_daddr = s; 2376 } else { 2377 t = ntohl(pkt_dev->cur_daddr); 2378 t++; 2379 if (t > imx) { 2380 t = imn; 2381 } 2382 pkt_dev->cur_daddr = htonl(t); 2383 } 2384 } 2385 if (pkt_dev->cflows) { 2386 pkt_dev->flows[flow].flags |= F_INIT; 2387 pkt_dev->flows[flow].cur_daddr = 2388 pkt_dev->cur_daddr; 2389 #ifdef CONFIG_XFRM 2390 if (pkt_dev->flags & F_IPSEC_ON) 2391 get_ipsec_sa(pkt_dev, flow); 2392 #endif 2393 pkt_dev->nflows++; 2394 } 2395 } 2396 } else { /* IPV6 * */ 2397 2398 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 && 2399 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 && 2400 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 && 2401 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ; 2402 else { 2403 int i; 2404 2405 /* Only random destinations yet */ 2406 2407 for (i = 0; i < 4; i++) { 2408 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2409 (((__force __be32)random32() | 2410 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2411 pkt_dev->max_in6_daddr.s6_addr32[i]); 2412 } 2413 } 2414 } 2415 2416 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2417 __u32 t; 2418 if (pkt_dev->flags & F_TXSIZE_RND) { 2419 t = random32() % 2420 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2421 + pkt_dev->min_pkt_size; 2422 } else { 2423 t = pkt_dev->cur_pkt_size + 1; 2424 if (t > pkt_dev->max_pkt_size) 2425 t = pkt_dev->min_pkt_size; 2426 } 2427 pkt_dev->cur_pkt_size = t; 2428 } 2429 2430 set_cur_queue_map(pkt_dev); 2431 2432 pkt_dev->flows[flow].count++; 2433 } 2434 2435 2436 #ifdef CONFIG_XFRM 2437 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2438 { 2439 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2440 int err = 0; 2441 struct iphdr *iph; 2442 2443 if (!x) 2444 return 0; 2445 /* XXX: we dont support tunnel mode for now until 2446 * we resolve the dst issue */ 2447 if (x->props.mode != XFRM_MODE_TRANSPORT) 2448 return 0; 2449 2450 spin_lock(&x->lock); 2451 iph = ip_hdr(skb); 2452 2453 err = x->outer_mode->output(x, skb); 2454 if (err) 2455 goto error; 2456 err = x->type->output(x, skb); 2457 if (err) 2458 goto error; 2459 2460 x->curlft.bytes += skb->len; 2461 x->curlft.packets++; 2462 error: 2463 spin_unlock(&x->lock); 2464 return err; 2465 } 2466 2467 static void free_SAs(struct pktgen_dev *pkt_dev) 2468 { 2469 if (pkt_dev->cflows) { 2470 /* let go of the SAs if we have them */ 2471 int i = 0; 2472 for (; i < pkt_dev->cflows; i++) { 2473 struct xfrm_state *x = pkt_dev->flows[i].x; 2474 if (x) { 2475 xfrm_state_put(x); 2476 pkt_dev->flows[i].x = NULL; 2477 } 2478 } 2479 } 2480 } 2481 2482 static int process_ipsec(struct pktgen_dev *pkt_dev, 2483 struct sk_buff *skb, __be16 protocol) 2484 { 2485 if (pkt_dev->flags & F_IPSEC_ON) { 2486 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2487 int nhead = 0; 2488 if (x) { 2489 int ret; 2490 __u8 *eth; 2491 nhead = x->props.header_len - skb_headroom(skb); 2492 if (nhead > 0) { 2493 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2494 if (ret < 0) { 2495 printk(KERN_ERR "Error expanding " 2496 "ipsec packet %d\n", ret); 2497 goto err; 2498 } 2499 } 2500 2501 /* ipsec is not expecting ll header */ 2502 skb_pull(skb, ETH_HLEN); 2503 ret = pktgen_output_ipsec(skb, pkt_dev); 2504 if (ret) { 2505 printk(KERN_ERR "Error creating ipsec " 2506 "packet %d\n", ret); 2507 goto err; 2508 } 2509 /* restore ll */ 2510 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2511 memcpy(eth, pkt_dev->hh, 12); 2512 *(u16 *) ð[12] = protocol; 2513 } 2514 } 2515 return 1; 2516 err: 2517 kfree_skb(skb); 2518 return 0; 2519 } 2520 #endif 2521 2522 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2523 { 2524 unsigned i; 2525 for (i = 0; i < pkt_dev->nr_labels; i++) 2526 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2527 2528 mpls--; 2529 *mpls |= MPLS_STACK_BOTTOM; 2530 } 2531 2532 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2533 unsigned int prio) 2534 { 2535 return htons(id | (cfi << 12) | (prio << 13)); 2536 } 2537 2538 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2539 struct pktgen_dev *pkt_dev) 2540 { 2541 struct sk_buff *skb = NULL; 2542 __u8 *eth; 2543 struct udphdr *udph; 2544 int datalen, iplen; 2545 struct iphdr *iph; 2546 struct pktgen_hdr *pgh = NULL; 2547 __be16 protocol = htons(ETH_P_IP); 2548 __be32 *mpls; 2549 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2550 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2551 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2552 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2553 u16 queue_map; 2554 2555 if (pkt_dev->nr_labels) 2556 protocol = htons(ETH_P_MPLS_UC); 2557 2558 if (pkt_dev->vlan_id != 0xffff) 2559 protocol = htons(ETH_P_8021Q); 2560 2561 /* Update any of the values, used when we're incrementing various 2562 * fields. 2563 */ 2564 queue_map = pkt_dev->cur_queue_map; 2565 mod_cur_headers(pkt_dev); 2566 2567 datalen = (odev->hard_header_len + 16) & ~0xf; 2568 skb = __netdev_alloc_skb(odev, 2569 pkt_dev->cur_pkt_size + 64 2570 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT); 2571 if (!skb) { 2572 sprintf(pkt_dev->result, "No memory"); 2573 return NULL; 2574 } 2575 2576 skb_reserve(skb, datalen); 2577 2578 /* Reserve for ethernet and IP header */ 2579 eth = (__u8 *) skb_push(skb, 14); 2580 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2581 if (pkt_dev->nr_labels) 2582 mpls_push(mpls, pkt_dev); 2583 2584 if (pkt_dev->vlan_id != 0xffff) { 2585 if (pkt_dev->svlan_id != 0xffff) { 2586 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2587 *svlan_tci = build_tci(pkt_dev->svlan_id, 2588 pkt_dev->svlan_cfi, 2589 pkt_dev->svlan_p); 2590 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2591 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2592 } 2593 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2594 *vlan_tci = build_tci(pkt_dev->vlan_id, 2595 pkt_dev->vlan_cfi, 2596 pkt_dev->vlan_p); 2597 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2598 *vlan_encapsulated_proto = htons(ETH_P_IP); 2599 } 2600 2601 skb->network_header = skb->tail; 2602 skb->transport_header = skb->network_header + sizeof(struct iphdr); 2603 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr)); 2604 skb_set_queue_mapping(skb, queue_map); 2605 iph = ip_hdr(skb); 2606 udph = udp_hdr(skb); 2607 2608 memcpy(eth, pkt_dev->hh, 12); 2609 *(__be16 *) & eth[12] = protocol; 2610 2611 /* Eth + IPh + UDPh + mpls */ 2612 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2613 pkt_dev->pkt_overhead; 2614 if (datalen < sizeof(struct pktgen_hdr)) 2615 datalen = sizeof(struct pktgen_hdr); 2616 2617 udph->source = htons(pkt_dev->cur_udp_src); 2618 udph->dest = htons(pkt_dev->cur_udp_dst); 2619 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2620 udph->check = 0; /* No checksum */ 2621 2622 iph->ihl = 5; 2623 iph->version = 4; 2624 iph->ttl = 32; 2625 iph->tos = pkt_dev->tos; 2626 iph->protocol = IPPROTO_UDP; /* UDP */ 2627 iph->saddr = pkt_dev->cur_saddr; 2628 iph->daddr = pkt_dev->cur_daddr; 2629 iph->frag_off = 0; 2630 iplen = 20 + 8 + datalen; 2631 iph->tot_len = htons(iplen); 2632 iph->check = 0; 2633 iph->check = ip_fast_csum((void *)iph, iph->ihl); 2634 skb->protocol = protocol; 2635 skb->mac_header = (skb->network_header - ETH_HLEN - 2636 pkt_dev->pkt_overhead); 2637 skb->dev = odev; 2638 skb->pkt_type = PACKET_HOST; 2639 2640 if (pkt_dev->nfrags <= 0) 2641 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 2642 else { 2643 int frags = pkt_dev->nfrags; 2644 int i; 2645 2646 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 2647 2648 if (frags > MAX_SKB_FRAGS) 2649 frags = MAX_SKB_FRAGS; 2650 if (datalen > frags * PAGE_SIZE) { 2651 skb_put(skb, datalen - frags * PAGE_SIZE); 2652 datalen = frags * PAGE_SIZE; 2653 } 2654 2655 i = 0; 2656 while (datalen > 0) { 2657 struct page *page = alloc_pages(GFP_KERNEL, 0); 2658 skb_shinfo(skb)->frags[i].page = page; 2659 skb_shinfo(skb)->frags[i].page_offset = 0; 2660 skb_shinfo(skb)->frags[i].size = 2661 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 2662 datalen -= skb_shinfo(skb)->frags[i].size; 2663 skb->len += skb_shinfo(skb)->frags[i].size; 2664 skb->data_len += skb_shinfo(skb)->frags[i].size; 2665 i++; 2666 skb_shinfo(skb)->nr_frags = i; 2667 } 2668 2669 while (i < frags) { 2670 int rem; 2671 2672 if (i == 0) 2673 break; 2674 2675 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 2676 if (rem == 0) 2677 break; 2678 2679 skb_shinfo(skb)->frags[i - 1].size -= rem; 2680 2681 skb_shinfo(skb)->frags[i] = 2682 skb_shinfo(skb)->frags[i - 1]; 2683 get_page(skb_shinfo(skb)->frags[i].page); 2684 skb_shinfo(skb)->frags[i].page = 2685 skb_shinfo(skb)->frags[i - 1].page; 2686 skb_shinfo(skb)->frags[i].page_offset += 2687 skb_shinfo(skb)->frags[i - 1].size; 2688 skb_shinfo(skb)->frags[i].size = rem; 2689 i++; 2690 skb_shinfo(skb)->nr_frags = i; 2691 } 2692 } 2693 2694 /* Stamp the time, and sequence number, 2695 * convert them to network byte order 2696 */ 2697 if (pgh) { 2698 struct timeval timestamp; 2699 2700 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2701 pgh->seq_num = htonl(pkt_dev->seq_num); 2702 2703 do_gettimeofday(×tamp); 2704 pgh->tv_sec = htonl(timestamp.tv_sec); 2705 pgh->tv_usec = htonl(timestamp.tv_usec); 2706 } 2707 2708 #ifdef CONFIG_XFRM 2709 if (!process_ipsec(pkt_dev, skb, protocol)) 2710 return NULL; 2711 #endif 2712 2713 return skb; 2714 } 2715 2716 /* 2717 * scan_ip6, fmt_ip taken from dietlibc-0.21 2718 * Author Felix von Leitner <felix-dietlibc@fefe.de> 2719 * 2720 * Slightly modified for kernel. 2721 * Should be candidate for net/ipv4/utils.c 2722 * --ro 2723 */ 2724 2725 static unsigned int scan_ip6(const char *s, char ip[16]) 2726 { 2727 unsigned int i; 2728 unsigned int len = 0; 2729 unsigned long u; 2730 char suffix[16]; 2731 unsigned int prefixlen = 0; 2732 unsigned int suffixlen = 0; 2733 __be32 tmp; 2734 char *pos; 2735 2736 for (i = 0; i < 16; i++) 2737 ip[i] = 0; 2738 2739 for (;;) { 2740 if (*s == ':') { 2741 len++; 2742 if (s[1] == ':') { /* Found "::", skip to part 2 */ 2743 s += 2; 2744 len++; 2745 break; 2746 } 2747 s++; 2748 } 2749 2750 u = simple_strtoul(s, &pos, 16); 2751 i = pos - s; 2752 if (!i) 2753 return 0; 2754 if (prefixlen == 12 && s[i] == '.') { 2755 2756 /* the last 4 bytes may be written as IPv4 address */ 2757 2758 tmp = in_aton(s); 2759 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp)); 2760 return i + len; 2761 } 2762 ip[prefixlen++] = (u >> 8); 2763 ip[prefixlen++] = (u & 255); 2764 s += i; 2765 len += i; 2766 if (prefixlen == 16) 2767 return len; 2768 } 2769 2770 /* part 2, after "::" */ 2771 for (;;) { 2772 if (*s == ':') { 2773 if (suffixlen == 0) 2774 break; 2775 s++; 2776 len++; 2777 } else if (suffixlen != 0) 2778 break; 2779 2780 u = simple_strtol(s, &pos, 16); 2781 i = pos - s; 2782 if (!i) { 2783 if (*s) 2784 len--; 2785 break; 2786 } 2787 if (suffixlen + prefixlen <= 12 && s[i] == '.') { 2788 tmp = in_aton(s); 2789 memcpy((struct in_addr *)(suffix + suffixlen), &tmp, 2790 sizeof(tmp)); 2791 suffixlen += 4; 2792 len += strlen(s); 2793 break; 2794 } 2795 suffix[suffixlen++] = (u >> 8); 2796 suffix[suffixlen++] = (u & 255); 2797 s += i; 2798 len += i; 2799 if (prefixlen + suffixlen == 16) 2800 break; 2801 } 2802 for (i = 0; i < suffixlen; i++) 2803 ip[16 - suffixlen + i] = suffix[i]; 2804 return len; 2805 } 2806 2807 static char tohex(char hexdigit) 2808 { 2809 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0'; 2810 } 2811 2812 static int fmt_xlong(char *s, unsigned int i) 2813 { 2814 char *bak = s; 2815 *s = tohex((i >> 12) & 0xf); 2816 if (s != bak || *s != '0') 2817 ++s; 2818 *s = tohex((i >> 8) & 0xf); 2819 if (s != bak || *s != '0') 2820 ++s; 2821 *s = tohex((i >> 4) & 0xf); 2822 if (s != bak || *s != '0') 2823 ++s; 2824 *s = tohex(i & 0xf); 2825 return s - bak + 1; 2826 } 2827 2828 static unsigned int fmt_ip6(char *s, const char ip[16]) 2829 { 2830 unsigned int len; 2831 unsigned int i; 2832 unsigned int temp; 2833 unsigned int compressing; 2834 int j; 2835 2836 len = 0; 2837 compressing = 0; 2838 for (j = 0; j < 16; j += 2) { 2839 2840 #ifdef V4MAPPEDPREFIX 2841 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) { 2842 inet_ntoa_r(*(struct in_addr *)(ip + 12), s); 2843 temp = strlen(s); 2844 return len + temp; 2845 } 2846 #endif 2847 temp = ((unsigned long)(unsigned char)ip[j] << 8) + 2848 (unsigned long)(unsigned char)ip[j + 1]; 2849 if (temp == 0) { 2850 if (!compressing) { 2851 compressing = 1; 2852 if (j == 0) { 2853 *s++ = ':'; 2854 ++len; 2855 } 2856 } 2857 } else { 2858 if (compressing) { 2859 compressing = 0; 2860 *s++ = ':'; 2861 ++len; 2862 } 2863 i = fmt_xlong(s, temp); 2864 len += i; 2865 s += i; 2866 if (j < 14) { 2867 *s++ = ':'; 2868 ++len; 2869 } 2870 } 2871 } 2872 if (compressing) { 2873 *s++ = ':'; 2874 ++len; 2875 } 2876 *s = 0; 2877 return len; 2878 } 2879 2880 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2881 struct pktgen_dev *pkt_dev) 2882 { 2883 struct sk_buff *skb = NULL; 2884 __u8 *eth; 2885 struct udphdr *udph; 2886 int datalen; 2887 struct ipv6hdr *iph; 2888 struct pktgen_hdr *pgh = NULL; 2889 __be16 protocol = htons(ETH_P_IPV6); 2890 __be32 *mpls; 2891 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2892 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2893 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2894 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2895 u16 queue_map; 2896 2897 if (pkt_dev->nr_labels) 2898 protocol = htons(ETH_P_MPLS_UC); 2899 2900 if (pkt_dev->vlan_id != 0xffff) 2901 protocol = htons(ETH_P_8021Q); 2902 2903 /* Update any of the values, used when we're incrementing various 2904 * fields. 2905 */ 2906 queue_map = pkt_dev->cur_queue_map; 2907 mod_cur_headers(pkt_dev); 2908 2909 skb = __netdev_alloc_skb(odev, 2910 pkt_dev->cur_pkt_size + 64 2911 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT); 2912 if (!skb) { 2913 sprintf(pkt_dev->result, "No memory"); 2914 return NULL; 2915 } 2916 2917 skb_reserve(skb, 16); 2918 2919 /* Reserve for ethernet and IP header */ 2920 eth = (__u8 *) skb_push(skb, 14); 2921 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2922 if (pkt_dev->nr_labels) 2923 mpls_push(mpls, pkt_dev); 2924 2925 if (pkt_dev->vlan_id != 0xffff) { 2926 if (pkt_dev->svlan_id != 0xffff) { 2927 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2928 *svlan_tci = build_tci(pkt_dev->svlan_id, 2929 pkt_dev->svlan_cfi, 2930 pkt_dev->svlan_p); 2931 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2932 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2933 } 2934 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2935 *vlan_tci = build_tci(pkt_dev->vlan_id, 2936 pkt_dev->vlan_cfi, 2937 pkt_dev->vlan_p); 2938 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2939 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 2940 } 2941 2942 skb->network_header = skb->tail; 2943 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr); 2944 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr)); 2945 skb_set_queue_mapping(skb, queue_map); 2946 iph = ipv6_hdr(skb); 2947 udph = udp_hdr(skb); 2948 2949 memcpy(eth, pkt_dev->hh, 12); 2950 *(__be16 *) ð[12] = protocol; 2951 2952 /* Eth + IPh + UDPh + mpls */ 2953 datalen = pkt_dev->cur_pkt_size - 14 - 2954 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 2955 pkt_dev->pkt_overhead; 2956 2957 if (datalen < sizeof(struct pktgen_hdr)) { 2958 datalen = sizeof(struct pktgen_hdr); 2959 if (net_ratelimit()) 2960 printk(KERN_INFO "pktgen: increased datalen to %d\n", 2961 datalen); 2962 } 2963 2964 udph->source = htons(pkt_dev->cur_udp_src); 2965 udph->dest = htons(pkt_dev->cur_udp_dst); 2966 udph->len = htons(datalen + sizeof(struct udphdr)); 2967 udph->check = 0; /* No checksum */ 2968 2969 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 2970 2971 if (pkt_dev->traffic_class) { 2972 /* Version + traffic class + flow (0) */ 2973 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 2974 } 2975 2976 iph->hop_limit = 32; 2977 2978 iph->payload_len = htons(sizeof(struct udphdr) + datalen); 2979 iph->nexthdr = IPPROTO_UDP; 2980 2981 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr); 2982 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr); 2983 2984 skb->mac_header = (skb->network_header - ETH_HLEN - 2985 pkt_dev->pkt_overhead); 2986 skb->protocol = protocol; 2987 skb->dev = odev; 2988 skb->pkt_type = PACKET_HOST; 2989 2990 if (pkt_dev->nfrags <= 0) 2991 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 2992 else { 2993 int frags = pkt_dev->nfrags; 2994 int i; 2995 2996 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 2997 2998 if (frags > MAX_SKB_FRAGS) 2999 frags = MAX_SKB_FRAGS; 3000 if (datalen > frags * PAGE_SIZE) { 3001 skb_put(skb, datalen - frags * PAGE_SIZE); 3002 datalen = frags * PAGE_SIZE; 3003 } 3004 3005 i = 0; 3006 while (datalen > 0) { 3007 struct page *page = alloc_pages(GFP_KERNEL, 0); 3008 skb_shinfo(skb)->frags[i].page = page; 3009 skb_shinfo(skb)->frags[i].page_offset = 0; 3010 skb_shinfo(skb)->frags[i].size = 3011 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 3012 datalen -= skb_shinfo(skb)->frags[i].size; 3013 skb->len += skb_shinfo(skb)->frags[i].size; 3014 skb->data_len += skb_shinfo(skb)->frags[i].size; 3015 i++; 3016 skb_shinfo(skb)->nr_frags = i; 3017 } 3018 3019 while (i < frags) { 3020 int rem; 3021 3022 if (i == 0) 3023 break; 3024 3025 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 3026 if (rem == 0) 3027 break; 3028 3029 skb_shinfo(skb)->frags[i - 1].size -= rem; 3030 3031 skb_shinfo(skb)->frags[i] = 3032 skb_shinfo(skb)->frags[i - 1]; 3033 get_page(skb_shinfo(skb)->frags[i].page); 3034 skb_shinfo(skb)->frags[i].page = 3035 skb_shinfo(skb)->frags[i - 1].page; 3036 skb_shinfo(skb)->frags[i].page_offset += 3037 skb_shinfo(skb)->frags[i - 1].size; 3038 skb_shinfo(skb)->frags[i].size = rem; 3039 i++; 3040 skb_shinfo(skb)->nr_frags = i; 3041 } 3042 } 3043 3044 /* Stamp the time, and sequence number, 3045 * convert them to network byte order 3046 * should we update cloned packets too ? 3047 */ 3048 if (pgh) { 3049 struct timeval timestamp; 3050 3051 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 3052 pgh->seq_num = htonl(pkt_dev->seq_num); 3053 3054 do_gettimeofday(×tamp); 3055 pgh->tv_sec = htonl(timestamp.tv_sec); 3056 pgh->tv_usec = htonl(timestamp.tv_usec); 3057 } 3058 /* pkt_dev->seq_num++; FF: you really mean this? */ 3059 3060 return skb; 3061 } 3062 3063 static struct sk_buff *fill_packet(struct net_device *odev, 3064 struct pktgen_dev *pkt_dev) 3065 { 3066 if (pkt_dev->flags & F_IPV6) 3067 return fill_packet_ipv6(odev, pkt_dev); 3068 else 3069 return fill_packet_ipv4(odev, pkt_dev); 3070 } 3071 3072 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 3073 { 3074 pkt_dev->seq_num = 1; 3075 pkt_dev->idle_acc = 0; 3076 pkt_dev->sofar = 0; 3077 pkt_dev->tx_bytes = 0; 3078 pkt_dev->errors = 0; 3079 } 3080 3081 /* Set up structure for sending pkts, clear counters */ 3082 3083 static void pktgen_run(struct pktgen_thread *t) 3084 { 3085 struct pktgen_dev *pkt_dev; 3086 int started = 0; 3087 3088 pr_debug("pktgen: entering pktgen_run. %p\n", t); 3089 3090 if_lock(t); 3091 list_for_each_entry(pkt_dev, &t->if_list, list) { 3092 3093 /* 3094 * setup odev and create initial packet. 3095 */ 3096 pktgen_setup_inject(pkt_dev); 3097 3098 if (pkt_dev->odev) { 3099 pktgen_clear_counters(pkt_dev); 3100 pkt_dev->running = 1; /* Cranke yeself! */ 3101 pkt_dev->skb = NULL; 3102 pkt_dev->started_at = 3103 pkt_dev->next_tx = ktime_now(); 3104 3105 set_pkt_overhead(pkt_dev); 3106 3107 strcpy(pkt_dev->result, "Starting"); 3108 started++; 3109 } else 3110 strcpy(pkt_dev->result, "Error starting"); 3111 } 3112 if_unlock(t); 3113 if (started) 3114 t->control &= ~(T_STOP); 3115 } 3116 3117 static void pktgen_stop_all_threads_ifs(void) 3118 { 3119 struct pktgen_thread *t; 3120 3121 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n"); 3122 3123 mutex_lock(&pktgen_thread_lock); 3124 3125 list_for_each_entry(t, &pktgen_threads, th_list) 3126 t->control |= T_STOP; 3127 3128 mutex_unlock(&pktgen_thread_lock); 3129 } 3130 3131 static int thread_is_running(const struct pktgen_thread *t) 3132 { 3133 const struct pktgen_dev *pkt_dev; 3134 3135 list_for_each_entry(pkt_dev, &t->if_list, list) 3136 if (pkt_dev->running) 3137 return 1; 3138 return 0; 3139 } 3140 3141 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3142 { 3143 if_lock(t); 3144 3145 while (thread_is_running(t)) { 3146 3147 if_unlock(t); 3148 3149 msleep_interruptible(100); 3150 3151 if (signal_pending(current)) 3152 goto signal; 3153 if_lock(t); 3154 } 3155 if_unlock(t); 3156 return 1; 3157 signal: 3158 return 0; 3159 } 3160 3161 static int pktgen_wait_all_threads_run(void) 3162 { 3163 struct pktgen_thread *t; 3164 int sig = 1; 3165 3166 mutex_lock(&pktgen_thread_lock); 3167 3168 list_for_each_entry(t, &pktgen_threads, th_list) { 3169 sig = pktgen_wait_thread_run(t); 3170 if (sig == 0) 3171 break; 3172 } 3173 3174 if (sig == 0) 3175 list_for_each_entry(t, &pktgen_threads, th_list) 3176 t->control |= (T_STOP); 3177 3178 mutex_unlock(&pktgen_thread_lock); 3179 return sig; 3180 } 3181 3182 static void pktgen_run_all_threads(void) 3183 { 3184 struct pktgen_thread *t; 3185 3186 pr_debug("pktgen: entering pktgen_run_all_threads.\n"); 3187 3188 mutex_lock(&pktgen_thread_lock); 3189 3190 list_for_each_entry(t, &pktgen_threads, th_list) 3191 t->control |= (T_RUN); 3192 3193 mutex_unlock(&pktgen_thread_lock); 3194 3195 /* Propagate thread->control */ 3196 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3197 3198 pktgen_wait_all_threads_run(); 3199 } 3200 3201 static void pktgen_reset_all_threads(void) 3202 { 3203 struct pktgen_thread *t; 3204 3205 pr_debug("pktgen: entering pktgen_reset_all_threads.\n"); 3206 3207 mutex_lock(&pktgen_thread_lock); 3208 3209 list_for_each_entry(t, &pktgen_threads, th_list) 3210 t->control |= (T_REMDEVALL); 3211 3212 mutex_unlock(&pktgen_thread_lock); 3213 3214 /* Propagate thread->control */ 3215 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3216 3217 pktgen_wait_all_threads_run(); 3218 } 3219 3220 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3221 { 3222 __u64 bps, mbps, pps; 3223 char *p = pkt_dev->result; 3224 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3225 pkt_dev->started_at); 3226 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3227 3228 p += sprintf(p, "OK: %llu(c%llu+d%llu) nsec, %llu (%dbyte,%dfrags)\n", 3229 (unsigned long long)ktime_to_us(elapsed), 3230 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3231 (unsigned long long)ktime_to_us(idle), 3232 (unsigned long long)pkt_dev->sofar, 3233 pkt_dev->cur_pkt_size, nr_frags); 3234 3235 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3236 ktime_to_ns(elapsed)); 3237 3238 bps = pps * 8 * pkt_dev->cur_pkt_size; 3239 3240 mbps = bps; 3241 do_div(mbps, 1000000); 3242 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3243 (unsigned long long)pps, 3244 (unsigned long long)mbps, 3245 (unsigned long long)bps, 3246 (unsigned long long)pkt_dev->errors); 3247 } 3248 3249 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3250 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3251 { 3252 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3253 3254 if (!pkt_dev->running) { 3255 printk(KERN_WARNING "pktgen: interface: %s is already " 3256 "stopped\n", pkt_dev->odev->name); 3257 return -EINVAL; 3258 } 3259 3260 kfree_skb(pkt_dev->skb); 3261 pkt_dev->skb = NULL; 3262 pkt_dev->stopped_at = ktime_now(); 3263 pkt_dev->running = 0; 3264 3265 show_results(pkt_dev, nr_frags); 3266 3267 return 0; 3268 } 3269 3270 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3271 { 3272 struct pktgen_dev *pkt_dev, *best = NULL; 3273 3274 if_lock(t); 3275 3276 list_for_each_entry(pkt_dev, &t->if_list, list) { 3277 if (!pkt_dev->running) 3278 continue; 3279 if (best == NULL) 3280 best = pkt_dev; 3281 else if (ktime_lt(pkt_dev->next_tx, best->next_tx)) 3282 best = pkt_dev; 3283 } 3284 if_unlock(t); 3285 return best; 3286 } 3287 3288 static void pktgen_stop(struct pktgen_thread *t) 3289 { 3290 struct pktgen_dev *pkt_dev; 3291 3292 pr_debug("pktgen: entering pktgen_stop\n"); 3293 3294 if_lock(t); 3295 3296 list_for_each_entry(pkt_dev, &t->if_list, list) { 3297 pktgen_stop_device(pkt_dev); 3298 } 3299 3300 if_unlock(t); 3301 } 3302 3303 /* 3304 * one of our devices needs to be removed - find it 3305 * and remove it 3306 */ 3307 static void pktgen_rem_one_if(struct pktgen_thread *t) 3308 { 3309 struct list_head *q, *n; 3310 struct pktgen_dev *cur; 3311 3312 pr_debug("pktgen: entering pktgen_rem_one_if\n"); 3313 3314 if_lock(t); 3315 3316 list_for_each_safe(q, n, &t->if_list) { 3317 cur = list_entry(q, struct pktgen_dev, list); 3318 3319 if (!cur->removal_mark) 3320 continue; 3321 3322 kfree_skb(cur->skb); 3323 cur->skb = NULL; 3324 3325 pktgen_remove_device(t, cur); 3326 3327 break; 3328 } 3329 3330 if_unlock(t); 3331 } 3332 3333 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3334 { 3335 struct list_head *q, *n; 3336 struct pktgen_dev *cur; 3337 3338 /* Remove all devices, free mem */ 3339 3340 pr_debug("pktgen: entering pktgen_rem_all_ifs\n"); 3341 if_lock(t); 3342 3343 list_for_each_safe(q, n, &t->if_list) { 3344 cur = list_entry(q, struct pktgen_dev, list); 3345 3346 kfree_skb(cur->skb); 3347 cur->skb = NULL; 3348 3349 pktgen_remove_device(t, cur); 3350 } 3351 3352 if_unlock(t); 3353 } 3354 3355 static void pktgen_rem_thread(struct pktgen_thread *t) 3356 { 3357 /* Remove from the thread list */ 3358 3359 remove_proc_entry(t->tsk->comm, pg_proc_dir); 3360 3361 mutex_lock(&pktgen_thread_lock); 3362 3363 list_del(&t->th_list); 3364 3365 mutex_unlock(&pktgen_thread_lock); 3366 } 3367 3368 static void idle(struct pktgen_dev *pkt_dev) 3369 { 3370 ktime_t idle_start = ktime_now(); 3371 3372 if (need_resched()) 3373 schedule(); 3374 else 3375 cpu_relax(); 3376 3377 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3378 } 3379 3380 3381 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3382 { 3383 struct net_device *odev = pkt_dev->odev; 3384 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *) 3385 = odev->netdev_ops->ndo_start_xmit; 3386 struct netdev_queue *txq; 3387 u16 queue_map; 3388 int ret; 3389 3390 if (pkt_dev->delay) { 3391 spin(pkt_dev, pkt_dev->next_tx); 3392 3393 /* This is max DELAY, this has special meaning of 3394 * "never transmit" 3395 */ 3396 if (pkt_dev->delay == ULLONG_MAX) { 3397 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX); 3398 return; 3399 } 3400 } 3401 3402 if (!pkt_dev->skb) { 3403 set_cur_queue_map(pkt_dev); 3404 queue_map = pkt_dev->cur_queue_map; 3405 } else { 3406 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3407 } 3408 3409 txq = netdev_get_tx_queue(odev, queue_map); 3410 /* Did we saturate the queue already? */ 3411 if (netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq)) { 3412 /* If device is down, then all queues are permnantly frozen */ 3413 if (netif_running(odev)) 3414 idle(pkt_dev); 3415 else 3416 pktgen_stop_device(pkt_dev); 3417 return; 3418 } 3419 3420 if (!pkt_dev->skb || (pkt_dev->last_ok && 3421 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { 3422 /* build a new pkt */ 3423 kfree_skb(pkt_dev->skb); 3424 3425 pkt_dev->skb = fill_packet(odev, pkt_dev); 3426 if (pkt_dev->skb == NULL) { 3427 printk(KERN_ERR "pktgen: ERROR: couldn't " 3428 "allocate skb in fill_packet.\n"); 3429 schedule(); 3430 pkt_dev->clone_count--; /* back out increment, OOM */ 3431 return; 3432 } 3433 3434 pkt_dev->allocated_skbs++; 3435 pkt_dev->clone_count = 0; /* reset counter */ 3436 } 3437 3438 /* fill_packet() might have changed the queue */ 3439 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3440 txq = netdev_get_tx_queue(odev, queue_map); 3441 3442 __netif_tx_lock_bh(txq); 3443 if (unlikely(netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq))) 3444 pkt_dev->last_ok = 0; 3445 else { 3446 atomic_inc(&(pkt_dev->skb->users)); 3447 3448 retry_now: 3449 ret = (*xmit)(pkt_dev->skb, odev); 3450 switch (ret) { 3451 case NETDEV_TX_OK: 3452 txq_trans_update(txq); 3453 pkt_dev->last_ok = 1; 3454 pkt_dev->sofar++; 3455 pkt_dev->seq_num++; 3456 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size; 3457 break; 3458 case NETDEV_TX_LOCKED: 3459 cpu_relax(); 3460 goto retry_now; 3461 default: /* Drivers are not supposed to return other values! */ 3462 if (net_ratelimit()) 3463 pr_info("pktgen: %s xmit error: %d\n", 3464 odev->name, ret); 3465 pkt_dev->errors++; 3466 /* fallthru */ 3467 case NETDEV_TX_BUSY: 3468 /* Retry it next time */ 3469 atomic_dec(&(pkt_dev->skb->users)); 3470 pkt_dev->last_ok = 0; 3471 } 3472 3473 if (pkt_dev->delay) 3474 pkt_dev->next_tx = ktime_add_ns(ktime_now(), 3475 pkt_dev->delay); 3476 } 3477 __netif_tx_unlock_bh(txq); 3478 3479 /* If pkt_dev->count is zero, then run forever */ 3480 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3481 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3482 if (signal_pending(current)) 3483 break; 3484 idle(pkt_dev); 3485 } 3486 3487 /* Done with this */ 3488 pktgen_stop_device(pkt_dev); 3489 } 3490 } 3491 3492 /* 3493 * Main loop of the thread goes here 3494 */ 3495 3496 static int pktgen_thread_worker(void *arg) 3497 { 3498 DEFINE_WAIT(wait); 3499 struct pktgen_thread *t = arg; 3500 struct pktgen_dev *pkt_dev = NULL; 3501 int cpu = t->cpu; 3502 3503 BUG_ON(smp_processor_id() != cpu); 3504 3505 init_waitqueue_head(&t->queue); 3506 complete(&t->start_done); 3507 3508 pr_debug("pktgen: starting pktgen/%d: pid=%d\n", 3509 cpu, task_pid_nr(current)); 3510 3511 set_current_state(TASK_INTERRUPTIBLE); 3512 3513 set_freezable(); 3514 3515 while (!kthread_should_stop()) { 3516 pkt_dev = next_to_run(t); 3517 3518 if (!pkt_dev && 3519 (t->control & (T_STOP | T_RUN | T_REMDEVALL | T_REMDEV)) 3520 == 0) { 3521 prepare_to_wait(&(t->queue), &wait, 3522 TASK_INTERRUPTIBLE); 3523 schedule_timeout(HZ / 10); 3524 finish_wait(&(t->queue), &wait); 3525 } 3526 3527 __set_current_state(TASK_RUNNING); 3528 3529 if (pkt_dev) 3530 pktgen_xmit(pkt_dev); 3531 3532 if (t->control & T_STOP) { 3533 pktgen_stop(t); 3534 t->control &= ~(T_STOP); 3535 } 3536 3537 if (t->control & T_RUN) { 3538 pktgen_run(t); 3539 t->control &= ~(T_RUN); 3540 } 3541 3542 if (t->control & T_REMDEVALL) { 3543 pktgen_rem_all_ifs(t); 3544 t->control &= ~(T_REMDEVALL); 3545 } 3546 3547 if (t->control & T_REMDEV) { 3548 pktgen_rem_one_if(t); 3549 t->control &= ~(T_REMDEV); 3550 } 3551 3552 try_to_freeze(); 3553 3554 set_current_state(TASK_INTERRUPTIBLE); 3555 } 3556 3557 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm); 3558 pktgen_stop(t); 3559 3560 pr_debug("pktgen: %s removing all device\n", t->tsk->comm); 3561 pktgen_rem_all_ifs(t); 3562 3563 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm); 3564 pktgen_rem_thread(t); 3565 3566 return 0; 3567 } 3568 3569 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3570 const char *ifname) 3571 { 3572 struct pktgen_dev *p, *pkt_dev = NULL; 3573 if_lock(t); 3574 3575 list_for_each_entry(p, &t->if_list, list) 3576 if (strncmp(p->odev->name, ifname, IFNAMSIZ) == 0) { 3577 pkt_dev = p; 3578 break; 3579 } 3580 3581 if_unlock(t); 3582 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev); 3583 return pkt_dev; 3584 } 3585 3586 /* 3587 * Adds a dev at front of if_list. 3588 */ 3589 3590 static int add_dev_to_thread(struct pktgen_thread *t, 3591 struct pktgen_dev *pkt_dev) 3592 { 3593 int rv = 0; 3594 3595 if_lock(t); 3596 3597 if (pkt_dev->pg_thread) { 3598 printk(KERN_ERR "pktgen: ERROR: already assigned " 3599 "to a thread.\n"); 3600 rv = -EBUSY; 3601 goto out; 3602 } 3603 3604 list_add(&pkt_dev->list, &t->if_list); 3605 pkt_dev->pg_thread = t; 3606 pkt_dev->running = 0; 3607 3608 out: 3609 if_unlock(t); 3610 return rv; 3611 } 3612 3613 /* Called under thread lock */ 3614 3615 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3616 { 3617 struct pktgen_dev *pkt_dev; 3618 int err; 3619 3620 /* We don't allow a device to be on several threads */ 3621 3622 pkt_dev = __pktgen_NN_threads(ifname, FIND); 3623 if (pkt_dev) { 3624 printk(KERN_ERR "pktgen: ERROR: interface already used.\n"); 3625 return -EBUSY; 3626 } 3627 3628 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL); 3629 if (!pkt_dev) 3630 return -ENOMEM; 3631 3632 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state)); 3633 if (pkt_dev->flows == NULL) { 3634 kfree(pkt_dev); 3635 return -ENOMEM; 3636 } 3637 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state)); 3638 3639 pkt_dev->removal_mark = 0; 3640 pkt_dev->min_pkt_size = ETH_ZLEN; 3641 pkt_dev->max_pkt_size = ETH_ZLEN; 3642 pkt_dev->nfrags = 0; 3643 pkt_dev->clone_skb = pg_clone_skb_d; 3644 pkt_dev->delay = pg_delay_d; 3645 pkt_dev->count = pg_count_d; 3646 pkt_dev->sofar = 0; 3647 pkt_dev->udp_src_min = 9; /* sink port */ 3648 pkt_dev->udp_src_max = 9; 3649 pkt_dev->udp_dst_min = 9; 3650 pkt_dev->udp_dst_max = 9; 3651 3652 pkt_dev->vlan_p = 0; 3653 pkt_dev->vlan_cfi = 0; 3654 pkt_dev->vlan_id = 0xffff; 3655 pkt_dev->svlan_p = 0; 3656 pkt_dev->svlan_cfi = 0; 3657 pkt_dev->svlan_id = 0xffff; 3658 3659 err = pktgen_setup_dev(pkt_dev, ifname); 3660 if (err) 3661 goto out1; 3662 3663 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir, 3664 &pktgen_if_fops, pkt_dev); 3665 if (!pkt_dev->entry) { 3666 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n", 3667 PG_PROC_DIR, ifname); 3668 err = -EINVAL; 3669 goto out2; 3670 } 3671 #ifdef CONFIG_XFRM 3672 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3673 pkt_dev->ipsproto = IPPROTO_ESP; 3674 #endif 3675 3676 return add_dev_to_thread(t, pkt_dev); 3677 out2: 3678 dev_put(pkt_dev->odev); 3679 out1: 3680 #ifdef CONFIG_XFRM 3681 free_SAs(pkt_dev); 3682 #endif 3683 vfree(pkt_dev->flows); 3684 kfree(pkt_dev); 3685 return err; 3686 } 3687 3688 static int __init pktgen_create_thread(int cpu) 3689 { 3690 struct pktgen_thread *t; 3691 struct proc_dir_entry *pe; 3692 struct task_struct *p; 3693 3694 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL); 3695 if (!t) { 3696 printk(KERN_ERR "pktgen: ERROR: out of memory, can't " 3697 "create new thread.\n"); 3698 return -ENOMEM; 3699 } 3700 3701 spin_lock_init(&t->if_lock); 3702 t->cpu = cpu; 3703 3704 INIT_LIST_HEAD(&t->if_list); 3705 3706 list_add_tail(&t->th_list, &pktgen_threads); 3707 init_completion(&t->start_done); 3708 3709 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu); 3710 if (IS_ERR(p)) { 3711 printk(KERN_ERR "pktgen: kernel_thread() failed " 3712 "for cpu %d\n", t->cpu); 3713 list_del(&t->th_list); 3714 kfree(t); 3715 return PTR_ERR(p); 3716 } 3717 kthread_bind(p, cpu); 3718 t->tsk = p; 3719 3720 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir, 3721 &pktgen_thread_fops, t); 3722 if (!pe) { 3723 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n", 3724 PG_PROC_DIR, t->tsk->comm); 3725 kthread_stop(p); 3726 list_del(&t->th_list); 3727 kfree(t); 3728 return -EINVAL; 3729 } 3730 3731 wake_up_process(p); 3732 wait_for_completion(&t->start_done); 3733 3734 return 0; 3735 } 3736 3737 /* 3738 * Removes a device from the thread if_list. 3739 */ 3740 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3741 struct pktgen_dev *pkt_dev) 3742 { 3743 struct list_head *q, *n; 3744 struct pktgen_dev *p; 3745 3746 list_for_each_safe(q, n, &t->if_list) { 3747 p = list_entry(q, struct pktgen_dev, list); 3748 if (p == pkt_dev) 3749 list_del(&p->list); 3750 } 3751 } 3752 3753 static int pktgen_remove_device(struct pktgen_thread *t, 3754 struct pktgen_dev *pkt_dev) 3755 { 3756 3757 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev); 3758 3759 if (pkt_dev->running) { 3760 printk(KERN_WARNING "pktgen: WARNING: trying to remove a " 3761 "running interface, stopping it now.\n"); 3762 pktgen_stop_device(pkt_dev); 3763 } 3764 3765 /* Dis-associate from the interface */ 3766 3767 if (pkt_dev->odev) { 3768 dev_put(pkt_dev->odev); 3769 pkt_dev->odev = NULL; 3770 } 3771 3772 /* And update the thread if_list */ 3773 3774 _rem_dev_from_if_list(t, pkt_dev); 3775 3776 if (pkt_dev->entry) 3777 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 3778 3779 #ifdef CONFIG_XFRM 3780 free_SAs(pkt_dev); 3781 #endif 3782 vfree(pkt_dev->flows); 3783 kfree(pkt_dev); 3784 return 0; 3785 } 3786 3787 static int __init pg_init(void) 3788 { 3789 int cpu; 3790 struct proc_dir_entry *pe; 3791 3792 printk(KERN_INFO "%s", version); 3793 3794 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net); 3795 if (!pg_proc_dir) 3796 return -ENODEV; 3797 3798 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops); 3799 if (pe == NULL) { 3800 printk(KERN_ERR "pktgen: ERROR: cannot create %s " 3801 "procfs entry.\n", PGCTRL); 3802 proc_net_remove(&init_net, PG_PROC_DIR); 3803 return -EINVAL; 3804 } 3805 3806 /* Register us to receive netdevice events */ 3807 register_netdevice_notifier(&pktgen_notifier_block); 3808 3809 for_each_online_cpu(cpu) { 3810 int err; 3811 3812 err = pktgen_create_thread(cpu); 3813 if (err) 3814 printk(KERN_WARNING "pktgen: WARNING: Cannot create " 3815 "thread for cpu %d (%d)\n", cpu, err); 3816 } 3817 3818 if (list_empty(&pktgen_threads)) { 3819 printk(KERN_ERR "pktgen: ERROR: Initialization failed for " 3820 "all threads\n"); 3821 unregister_netdevice_notifier(&pktgen_notifier_block); 3822 remove_proc_entry(PGCTRL, pg_proc_dir); 3823 proc_net_remove(&init_net, PG_PROC_DIR); 3824 return -ENODEV; 3825 } 3826 3827 return 0; 3828 } 3829 3830 static void __exit pg_cleanup(void) 3831 { 3832 struct pktgen_thread *t; 3833 struct list_head *q, *n; 3834 wait_queue_head_t queue; 3835 init_waitqueue_head(&queue); 3836 3837 /* Stop all interfaces & threads */ 3838 3839 list_for_each_safe(q, n, &pktgen_threads) { 3840 t = list_entry(q, struct pktgen_thread, th_list); 3841 kthread_stop(t->tsk); 3842 kfree(t); 3843 } 3844 3845 /* Un-register us from receiving netdevice events */ 3846 unregister_netdevice_notifier(&pktgen_notifier_block); 3847 3848 /* Clean up proc file system */ 3849 remove_proc_entry(PGCTRL, pg_proc_dir); 3850 proc_net_remove(&init_net, PG_PROC_DIR); 3851 } 3852 3853 module_init(pg_init); 3854 module_exit(pg_cleanup); 3855 3856 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); 3857 MODULE_DESCRIPTION("Packet Generator tool"); 3858 MODULE_LICENSE("GPL"); 3859 MODULE_VERSION(VERSION); 3860 module_param(pg_count_d, int, 0); 3861 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); 3862 module_param(pg_delay_d, int, 0); 3863 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); 3864 module_param(pg_clone_skb_d, int, 0); 3865 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); 3866 module_param(debug, int, 0); 3867 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); 3868