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_STOP (1<<0) /* Stop run */ 196 #define T_RUN (1<<1) /* Start run */ 197 #define T_REMDEVALL (1<<2) /* Remove all devs */ 198 #define T_REMDEV (1<<3) /* Remove one dev */ 199 200 /* If lock -- can be removed after some work */ 201 #define if_lock(t) spin_lock(&(t->if_lock)); 202 #define if_unlock(t) spin_unlock(&(t->if_lock)); 203 204 /* Used to help with determining the pkts on receive */ 205 #define PKTGEN_MAGIC 0xbe9be955 206 #define PG_PROC_DIR "pktgen" 207 #define PGCTRL "pgctrl" 208 static struct proc_dir_entry *pg_proc_dir; 209 210 #define MAX_CFLOWS 65536 211 212 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4) 213 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4) 214 215 struct flow_state { 216 __be32 cur_daddr; 217 int count; 218 #ifdef CONFIG_XFRM 219 struct xfrm_state *x; 220 #endif 221 __u32 flags; 222 }; 223 224 /* flow flag bits */ 225 #define F_INIT (1<<0) /* flow has been initialized */ 226 227 struct pktgen_dev { 228 /* 229 * Try to keep frequent/infrequent used vars. separated. 230 */ 231 struct proc_dir_entry *entry; /* proc file */ 232 struct pktgen_thread *pg_thread;/* the owner */ 233 struct list_head list; /* chaining in the thread's run-queue */ 234 235 int running; /* if false, the test will stop */ 236 237 /* If min != max, then we will either do a linear iteration, or 238 * we will do a random selection from within the range. 239 */ 240 __u32 flags; 241 int removal_mark; /* non-zero => the device is marked for 242 * removal by worker thread */ 243 244 int min_pkt_size; /* = ETH_ZLEN; */ 245 int max_pkt_size; /* = ETH_ZLEN; */ 246 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */ 247 int nfrags; 248 u64 delay; /* nano-seconds */ 249 250 __u64 count; /* Default No packets to send */ 251 __u64 sofar; /* How many pkts we've sent so far */ 252 __u64 tx_bytes; /* How many bytes we've transmitted */ 253 __u64 errors; /* Errors when trying to transmit, 254 pkts will be re-sent */ 255 256 /* runtime counters relating to clone_skb */ 257 258 __u64 allocated_skbs; 259 __u32 clone_count; 260 int last_ok; /* Was last skb sent? 261 * Or a failed transmit of some sort? 262 * This will keep sequence numbers in order 263 */ 264 ktime_t next_tx; 265 ktime_t started_at; 266 ktime_t stopped_at; 267 u64 idle_acc; /* nano-seconds */ 268 269 __u32 seq_num; 270 271 int clone_skb; /* 272 * Use multiple SKBs during packet gen. 273 * If this number is greater than 1, then 274 * that many copies of the same packet will be 275 * sent before a new packet is allocated. 276 * If you want to send 1024 identical packets 277 * before creating a new packet, 278 * set clone_skb to 1024. 279 */ 280 281 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 282 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 283 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 284 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 285 286 struct in6_addr in6_saddr; 287 struct in6_addr in6_daddr; 288 struct in6_addr cur_in6_daddr; 289 struct in6_addr cur_in6_saddr; 290 /* For ranges */ 291 struct in6_addr min_in6_daddr; 292 struct in6_addr max_in6_daddr; 293 struct in6_addr min_in6_saddr; 294 struct in6_addr max_in6_saddr; 295 296 /* If we're doing ranges, random or incremental, then this 297 * defines the min/max for those ranges. 298 */ 299 __be32 saddr_min; /* inclusive, source IP address */ 300 __be32 saddr_max; /* exclusive, source IP address */ 301 __be32 daddr_min; /* inclusive, dest IP address */ 302 __be32 daddr_max; /* exclusive, dest IP address */ 303 304 __u16 udp_src_min; /* inclusive, source UDP port */ 305 __u16 udp_src_max; /* exclusive, source UDP port */ 306 __u16 udp_dst_min; /* inclusive, dest UDP port */ 307 __u16 udp_dst_max; /* exclusive, dest UDP port */ 308 309 /* DSCP + ECN */ 310 __u8 tos; /* six MSB of (former) IPv4 TOS 311 are for dscp codepoint */ 312 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 313 (see RFC 3260, sec. 4) */ 314 315 /* MPLS */ 316 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */ 317 __be32 labels[MAX_MPLS_LABELS]; 318 319 /* VLAN/SVLAN (802.1Q/Q-in-Q) */ 320 __u8 vlan_p; 321 __u8 vlan_cfi; 322 __u16 vlan_id; /* 0xffff means no vlan tag */ 323 324 __u8 svlan_p; 325 __u8 svlan_cfi; 326 __u16 svlan_id; /* 0xffff means no svlan tag */ 327 328 __u32 src_mac_count; /* How many MACs to iterate through */ 329 __u32 dst_mac_count; /* How many MACs to iterate through */ 330 331 unsigned char dst_mac[ETH_ALEN]; 332 unsigned char src_mac[ETH_ALEN]; 333 334 __u32 cur_dst_mac_offset; 335 __u32 cur_src_mac_offset; 336 __be32 cur_saddr; 337 __be32 cur_daddr; 338 __u16 cur_udp_dst; 339 __u16 cur_udp_src; 340 __u16 cur_queue_map; 341 __u32 cur_pkt_size; 342 343 __u8 hh[14]; 344 /* = { 345 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, 346 347 We fill in SRC address later 348 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 349 0x08, 0x00 350 }; 351 */ 352 __u16 pad; /* pad out the hh struct to an even 16 bytes */ 353 354 struct sk_buff *skb; /* skb we are to transmit next, used for when we 355 * are transmitting the same one multiple times 356 */ 357 struct net_device *odev; /* The out-going device. 358 * Note that the device should have it's 359 * pg_info pointer pointing back to this 360 * device. 361 * Set when the user specifies the out-going 362 * device name (not when the inject is 363 * started as it used to do.) 364 */ 365 struct flow_state *flows; 366 unsigned cflows; /* Concurrent flows (config) */ 367 unsigned lflow; /* Flow length (config) */ 368 unsigned nflows; /* accumulated flows (stats) */ 369 unsigned curfl; /* current sequenced flow (state)*/ 370 371 u16 queue_map_min; 372 u16 queue_map_max; 373 374 #ifdef CONFIG_XFRM 375 __u8 ipsmode; /* IPSEC mode (config) */ 376 __u8 ipsproto; /* IPSEC type (config) */ 377 #endif 378 char result[512]; 379 }; 380 381 struct pktgen_hdr { 382 __be32 pgh_magic; 383 __be32 seq_num; 384 __be32 tv_sec; 385 __be32 tv_usec; 386 }; 387 388 struct pktgen_thread { 389 spinlock_t if_lock; /* for list of devices */ 390 struct list_head if_list; /* All device here */ 391 struct list_head th_list; 392 struct task_struct *tsk; 393 char result[512]; 394 395 /* Field for thread to receive "posted" events terminate, 396 stop ifs etc. */ 397 398 u32 control; 399 int cpu; 400 401 wait_queue_head_t queue; 402 struct completion start_done; 403 }; 404 405 #define REMOVE 1 406 #define FIND 0 407 408 static inline ktime_t ktime_now(void) 409 { 410 struct timespec ts; 411 ktime_get_ts(&ts); 412 413 return timespec_to_ktime(ts); 414 } 415 416 /* This works even if 32 bit because of careful byte order choice */ 417 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2) 418 { 419 return cmp1.tv64 < cmp2.tv64; 420 } 421 422 static const char version[] = 423 "pktgen " VERSION ": Packet Generator for packet performance testing.\n"; 424 425 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i); 426 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname); 427 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 428 const char *ifname); 429 static int pktgen_device_event(struct notifier_block *, unsigned long, void *); 430 static void pktgen_run_all_threads(void); 431 static void pktgen_reset_all_threads(void); 432 static void pktgen_stop_all_threads_ifs(void); 433 434 static void pktgen_stop(struct pktgen_thread *t); 435 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); 436 437 static unsigned int scan_ip6(const char *s, char ip[16]); 438 static unsigned int fmt_ip6(char *s, const char ip[16]); 439 440 /* Module parameters, defaults. */ 441 static int pg_count_d __read_mostly = 1000; 442 static int pg_delay_d __read_mostly; 443 static int pg_clone_skb_d __read_mostly; 444 static int debug __read_mostly; 445 446 static DEFINE_MUTEX(pktgen_thread_lock); 447 static LIST_HEAD(pktgen_threads); 448 449 static struct notifier_block pktgen_notifier_block = { 450 .notifier_call = pktgen_device_event, 451 }; 452 453 /* 454 * /proc handling functions 455 * 456 */ 457 458 static int pgctrl_show(struct seq_file *seq, void *v) 459 { 460 seq_puts(seq, version); 461 return 0; 462 } 463 464 static ssize_t pgctrl_write(struct file *file, const char __user *buf, 465 size_t count, loff_t *ppos) 466 { 467 int err = 0; 468 char data[128]; 469 470 if (!capable(CAP_NET_ADMIN)) { 471 err = -EPERM; 472 goto out; 473 } 474 475 if (count > sizeof(data)) 476 count = sizeof(data); 477 478 if (copy_from_user(data, buf, count)) { 479 err = -EFAULT; 480 goto out; 481 } 482 data[count - 1] = 0; /* Make string */ 483 484 if (!strcmp(data, "stop")) 485 pktgen_stop_all_threads_ifs(); 486 487 else if (!strcmp(data, "start")) 488 pktgen_run_all_threads(); 489 490 else if (!strcmp(data, "reset")) 491 pktgen_reset_all_threads(); 492 493 else 494 printk(KERN_WARNING "pktgen: Unknown command: %s\n", data); 495 496 err = count; 497 498 out: 499 return err; 500 } 501 502 static int pgctrl_open(struct inode *inode, struct file *file) 503 { 504 return single_open(file, pgctrl_show, PDE(inode)->data); 505 } 506 507 static const struct file_operations pktgen_fops = { 508 .owner = THIS_MODULE, 509 .open = pgctrl_open, 510 .read = seq_read, 511 .llseek = seq_lseek, 512 .write = pgctrl_write, 513 .release = single_release, 514 }; 515 516 static int pktgen_if_show(struct seq_file *seq, void *v) 517 { 518 const struct pktgen_dev *pkt_dev = seq->private; 519 ktime_t stopped; 520 u64 idle; 521 522 seq_printf(seq, 523 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", 524 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, 525 pkt_dev->max_pkt_size); 526 527 seq_printf(seq, 528 " frags: %d delay: %llu clone_skb: %d ifname: %s\n", 529 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay, 530 pkt_dev->clone_skb, pkt_dev->odev->name); 531 532 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, 533 pkt_dev->lflow); 534 535 seq_printf(seq, 536 " queue_map_min: %u queue_map_max: %u\n", 537 pkt_dev->queue_map_min, 538 pkt_dev->queue_map_max); 539 540 if (pkt_dev->flags & F_IPV6) { 541 char b1[128], b2[128], b3[128]; 542 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr); 543 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr); 544 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr); 545 seq_printf(seq, 546 " saddr: %s min_saddr: %s max_saddr: %s\n", b1, 547 b2, b3); 548 549 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr); 550 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr); 551 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr); 552 seq_printf(seq, 553 " daddr: %s min_daddr: %s max_daddr: %s\n", b1, 554 b2, b3); 555 556 } else { 557 seq_printf(seq, 558 " dst_min: %s dst_max: %s\n", 559 pkt_dev->dst_min, pkt_dev->dst_max); 560 seq_printf(seq, 561 " src_min: %s src_max: %s\n", 562 pkt_dev->src_min, pkt_dev->src_max); 563 } 564 565 seq_puts(seq, " src_mac: "); 566 567 seq_printf(seq, "%pM ", 568 is_zero_ether_addr(pkt_dev->src_mac) ? 569 pkt_dev->odev->dev_addr : pkt_dev->src_mac); 570 571 seq_printf(seq, "dst_mac: "); 572 seq_printf(seq, "%pM\n", pkt_dev->dst_mac); 573 574 seq_printf(seq, 575 " udp_src_min: %d udp_src_max: %d" 576 " udp_dst_min: %d udp_dst_max: %d\n", 577 pkt_dev->udp_src_min, pkt_dev->udp_src_max, 578 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); 579 580 seq_printf(seq, 581 " src_mac_count: %d dst_mac_count: %d\n", 582 pkt_dev->src_mac_count, pkt_dev->dst_mac_count); 583 584 if (pkt_dev->nr_labels) { 585 unsigned i; 586 seq_printf(seq, " mpls: "); 587 for (i = 0; i < pkt_dev->nr_labels; i++) 588 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), 589 i == pkt_dev->nr_labels-1 ? "\n" : ", "); 590 } 591 592 if (pkt_dev->vlan_id != 0xffff) 593 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", 594 pkt_dev->vlan_id, pkt_dev->vlan_p, 595 pkt_dev->vlan_cfi); 596 597 if (pkt_dev->svlan_id != 0xffff) 598 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", 599 pkt_dev->svlan_id, pkt_dev->svlan_p, 600 pkt_dev->svlan_cfi); 601 602 if (pkt_dev->tos) 603 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); 604 605 if (pkt_dev->traffic_class) 606 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); 607 608 seq_printf(seq, " Flags: "); 609 610 if (pkt_dev->flags & F_IPV6) 611 seq_printf(seq, "IPV6 "); 612 613 if (pkt_dev->flags & F_IPSRC_RND) 614 seq_printf(seq, "IPSRC_RND "); 615 616 if (pkt_dev->flags & F_IPDST_RND) 617 seq_printf(seq, "IPDST_RND "); 618 619 if (pkt_dev->flags & F_TXSIZE_RND) 620 seq_printf(seq, "TXSIZE_RND "); 621 622 if (pkt_dev->flags & F_UDPSRC_RND) 623 seq_printf(seq, "UDPSRC_RND "); 624 625 if (pkt_dev->flags & F_UDPDST_RND) 626 seq_printf(seq, "UDPDST_RND "); 627 628 if (pkt_dev->flags & F_MPLS_RND) 629 seq_printf(seq, "MPLS_RND "); 630 631 if (pkt_dev->flags & F_QUEUE_MAP_RND) 632 seq_printf(seq, "QUEUE_MAP_RND "); 633 634 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 635 seq_printf(seq, "QUEUE_MAP_CPU "); 636 637 if (pkt_dev->cflows) { 638 if (pkt_dev->flags & F_FLOW_SEQ) 639 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/ 640 else 641 seq_printf(seq, "FLOW_RND "); 642 } 643 644 #ifdef CONFIG_XFRM 645 if (pkt_dev->flags & F_IPSEC_ON) 646 seq_printf(seq, "IPSEC "); 647 #endif 648 649 if (pkt_dev->flags & F_MACSRC_RND) 650 seq_printf(seq, "MACSRC_RND "); 651 652 if (pkt_dev->flags & F_MACDST_RND) 653 seq_printf(seq, "MACDST_RND "); 654 655 if (pkt_dev->flags & F_VID_RND) 656 seq_printf(seq, "VID_RND "); 657 658 if (pkt_dev->flags & F_SVID_RND) 659 seq_printf(seq, "SVID_RND "); 660 661 seq_puts(seq, "\n"); 662 663 /* not really stopped, more like last-running-at */ 664 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at; 665 idle = pkt_dev->idle_acc; 666 do_div(idle, NSEC_PER_USEC); 667 668 seq_printf(seq, 669 "Current:\n pkts-sofar: %llu errors: %llu\n", 670 (unsigned long long)pkt_dev->sofar, 671 (unsigned long long)pkt_dev->errors); 672 673 seq_printf(seq, 674 " started: %lluus stopped: %lluus idle: %lluus\n", 675 (unsigned long long) ktime_to_us(pkt_dev->started_at), 676 (unsigned long long) ktime_to_us(stopped), 677 (unsigned long long) idle); 678 679 seq_printf(seq, 680 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 681 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, 682 pkt_dev->cur_src_mac_offset); 683 684 if (pkt_dev->flags & F_IPV6) { 685 char b1[128], b2[128]; 686 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr); 687 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr); 688 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1); 689 } else 690 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n", 691 pkt_dev->cur_saddr, pkt_dev->cur_daddr); 692 693 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", 694 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 695 696 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); 697 698 seq_printf(seq, " flows: %u\n", pkt_dev->nflows); 699 700 if (pkt_dev->result[0]) 701 seq_printf(seq, "Result: %s\n", pkt_dev->result); 702 else 703 seq_printf(seq, "Result: Idle\n"); 704 705 return 0; 706 } 707 708 709 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, 710 __u32 *num) 711 { 712 int i = 0; 713 *num = 0; 714 715 for (; i < maxlen; i++) { 716 char c; 717 *num <<= 4; 718 if (get_user(c, &user_buffer[i])) 719 return -EFAULT; 720 if ((c >= '0') && (c <= '9')) 721 *num |= c - '0'; 722 else if ((c >= 'a') && (c <= 'f')) 723 *num |= c - 'a' + 10; 724 else if ((c >= 'A') && (c <= 'F')) 725 *num |= c - 'A' + 10; 726 else 727 break; 728 } 729 return i; 730 } 731 732 static int count_trail_chars(const char __user * user_buffer, 733 unsigned int maxlen) 734 { 735 int i; 736 737 for (i = 0; i < maxlen; i++) { 738 char c; 739 if (get_user(c, &user_buffer[i])) 740 return -EFAULT; 741 switch (c) { 742 case '\"': 743 case '\n': 744 case '\r': 745 case '\t': 746 case ' ': 747 case '=': 748 break; 749 default: 750 goto done; 751 } 752 } 753 done: 754 return i; 755 } 756 757 static unsigned long num_arg(const char __user * user_buffer, 758 unsigned long maxlen, unsigned long *num) 759 { 760 int i = 0; 761 *num = 0; 762 763 for (; i < maxlen; i++) { 764 char c; 765 if (get_user(c, &user_buffer[i])) 766 return -EFAULT; 767 if ((c >= '0') && (c <= '9')) { 768 *num *= 10; 769 *num += c - '0'; 770 } else 771 break; 772 } 773 return i; 774 } 775 776 static int strn_len(const char __user * user_buffer, unsigned int maxlen) 777 { 778 int i = 0; 779 780 for (; i < maxlen; i++) { 781 char c; 782 if (get_user(c, &user_buffer[i])) 783 return -EFAULT; 784 switch (c) { 785 case '\"': 786 case '\n': 787 case '\r': 788 case '\t': 789 case ' ': 790 goto done_str; 791 break; 792 default: 793 break; 794 } 795 } 796 done_str: 797 return i; 798 } 799 800 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) 801 { 802 unsigned n = 0; 803 char c; 804 ssize_t i = 0; 805 int len; 806 807 pkt_dev->nr_labels = 0; 808 do { 809 __u32 tmp; 810 len = hex32_arg(&buffer[i], 8, &tmp); 811 if (len <= 0) 812 return len; 813 pkt_dev->labels[n] = htonl(tmp); 814 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 815 pkt_dev->flags |= F_MPLS_RND; 816 i += len; 817 if (get_user(c, &buffer[i])) 818 return -EFAULT; 819 i++; 820 n++; 821 if (n >= MAX_MPLS_LABELS) 822 return -E2BIG; 823 } while (c == ','); 824 825 pkt_dev->nr_labels = n; 826 return i; 827 } 828 829 static ssize_t pktgen_if_write(struct file *file, 830 const char __user * user_buffer, size_t count, 831 loff_t * offset) 832 { 833 struct seq_file *seq = (struct seq_file *)file->private_data; 834 struct pktgen_dev *pkt_dev = seq->private; 835 int i = 0, max, len; 836 char name[16], valstr[32]; 837 unsigned long value = 0; 838 char *pg_result = NULL; 839 int tmp = 0; 840 char buf[128]; 841 842 pg_result = &(pkt_dev->result[0]); 843 844 if (count < 1) { 845 printk(KERN_WARNING "pktgen: wrong command format\n"); 846 return -EINVAL; 847 } 848 849 max = count - i; 850 tmp = count_trail_chars(&user_buffer[i], max); 851 if (tmp < 0) { 852 printk(KERN_WARNING "pktgen: illegal format\n"); 853 return tmp; 854 } 855 i += tmp; 856 857 /* Read variable name */ 858 859 len = strn_len(&user_buffer[i], sizeof(name) - 1); 860 if (len < 0) 861 return len; 862 863 memset(name, 0, sizeof(name)); 864 if (copy_from_user(name, &user_buffer[i], len)) 865 return -EFAULT; 866 i += len; 867 868 max = count - i; 869 len = count_trail_chars(&user_buffer[i], max); 870 if (len < 0) 871 return len; 872 873 i += len; 874 875 if (debug) { 876 char tb[count + 1]; 877 if (copy_from_user(tb, user_buffer, count)) 878 return -EFAULT; 879 tb[count] = 0; 880 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name, 881 (unsigned long)count, tb); 882 } 883 884 if (!strcmp(name, "min_pkt_size")) { 885 len = num_arg(&user_buffer[i], 10, &value); 886 if (len < 0) 887 return len; 888 889 i += len; 890 if (value < 14 + 20 + 8) 891 value = 14 + 20 + 8; 892 if (value != pkt_dev->min_pkt_size) { 893 pkt_dev->min_pkt_size = value; 894 pkt_dev->cur_pkt_size = value; 895 } 896 sprintf(pg_result, "OK: min_pkt_size=%u", 897 pkt_dev->min_pkt_size); 898 return count; 899 } 900 901 if (!strcmp(name, "max_pkt_size")) { 902 len = num_arg(&user_buffer[i], 10, &value); 903 if (len < 0) 904 return len; 905 906 i += len; 907 if (value < 14 + 20 + 8) 908 value = 14 + 20 + 8; 909 if (value != pkt_dev->max_pkt_size) { 910 pkt_dev->max_pkt_size = value; 911 pkt_dev->cur_pkt_size = value; 912 } 913 sprintf(pg_result, "OK: max_pkt_size=%u", 914 pkt_dev->max_pkt_size); 915 return count; 916 } 917 918 /* Shortcut for min = max */ 919 920 if (!strcmp(name, "pkt_size")) { 921 len = num_arg(&user_buffer[i], 10, &value); 922 if (len < 0) 923 return len; 924 925 i += len; 926 if (value < 14 + 20 + 8) 927 value = 14 + 20 + 8; 928 if (value != pkt_dev->min_pkt_size) { 929 pkt_dev->min_pkt_size = value; 930 pkt_dev->max_pkt_size = value; 931 pkt_dev->cur_pkt_size = value; 932 } 933 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 934 return count; 935 } 936 937 if (!strcmp(name, "debug")) { 938 len = num_arg(&user_buffer[i], 10, &value); 939 if (len < 0) 940 return len; 941 942 i += len; 943 debug = value; 944 sprintf(pg_result, "OK: debug=%u", debug); 945 return count; 946 } 947 948 if (!strcmp(name, "frags")) { 949 len = num_arg(&user_buffer[i], 10, &value); 950 if (len < 0) 951 return len; 952 953 i += len; 954 pkt_dev->nfrags = value; 955 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 956 return count; 957 } 958 if (!strcmp(name, "delay")) { 959 len = num_arg(&user_buffer[i], 10, &value); 960 if (len < 0) 961 return len; 962 963 i += len; 964 if (value == 0x7FFFFFFF) 965 pkt_dev->delay = ULLONG_MAX; 966 else 967 pkt_dev->delay = (u64)value * NSEC_PER_USEC; 968 969 sprintf(pg_result, "OK: delay=%llu", 970 (unsigned long long) pkt_dev->delay); 971 return count; 972 } 973 if (!strcmp(name, "udp_src_min")) { 974 len = num_arg(&user_buffer[i], 10, &value); 975 if (len < 0) 976 return len; 977 978 i += len; 979 if (value != pkt_dev->udp_src_min) { 980 pkt_dev->udp_src_min = value; 981 pkt_dev->cur_udp_src = value; 982 } 983 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 984 return count; 985 } 986 if (!strcmp(name, "udp_dst_min")) { 987 len = num_arg(&user_buffer[i], 10, &value); 988 if (len < 0) 989 return len; 990 991 i += len; 992 if (value != pkt_dev->udp_dst_min) { 993 pkt_dev->udp_dst_min = value; 994 pkt_dev->cur_udp_dst = value; 995 } 996 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 997 return count; 998 } 999 if (!strcmp(name, "udp_src_max")) { 1000 len = num_arg(&user_buffer[i], 10, &value); 1001 if (len < 0) 1002 return len; 1003 1004 i += len; 1005 if (value != pkt_dev->udp_src_max) { 1006 pkt_dev->udp_src_max = value; 1007 pkt_dev->cur_udp_src = value; 1008 } 1009 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 1010 return count; 1011 } 1012 if (!strcmp(name, "udp_dst_max")) { 1013 len = num_arg(&user_buffer[i], 10, &value); 1014 if (len < 0) 1015 return len; 1016 1017 i += len; 1018 if (value != pkt_dev->udp_dst_max) { 1019 pkt_dev->udp_dst_max = value; 1020 pkt_dev->cur_udp_dst = value; 1021 } 1022 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1023 return count; 1024 } 1025 if (!strcmp(name, "clone_skb")) { 1026 len = num_arg(&user_buffer[i], 10, &value); 1027 if (len < 0) 1028 return len; 1029 1030 i += len; 1031 pkt_dev->clone_skb = value; 1032 1033 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1034 return count; 1035 } 1036 if (!strcmp(name, "count")) { 1037 len = num_arg(&user_buffer[i], 10, &value); 1038 if (len < 0) 1039 return len; 1040 1041 i += len; 1042 pkt_dev->count = value; 1043 sprintf(pg_result, "OK: count=%llu", 1044 (unsigned long long)pkt_dev->count); 1045 return count; 1046 } 1047 if (!strcmp(name, "src_mac_count")) { 1048 len = num_arg(&user_buffer[i], 10, &value); 1049 if (len < 0) 1050 return len; 1051 1052 i += len; 1053 if (pkt_dev->src_mac_count != value) { 1054 pkt_dev->src_mac_count = value; 1055 pkt_dev->cur_src_mac_offset = 0; 1056 } 1057 sprintf(pg_result, "OK: src_mac_count=%d", 1058 pkt_dev->src_mac_count); 1059 return count; 1060 } 1061 if (!strcmp(name, "dst_mac_count")) { 1062 len = num_arg(&user_buffer[i], 10, &value); 1063 if (len < 0) 1064 return len; 1065 1066 i += len; 1067 if (pkt_dev->dst_mac_count != value) { 1068 pkt_dev->dst_mac_count = value; 1069 pkt_dev->cur_dst_mac_offset = 0; 1070 } 1071 sprintf(pg_result, "OK: dst_mac_count=%d", 1072 pkt_dev->dst_mac_count); 1073 return count; 1074 } 1075 if (!strcmp(name, "flag")) { 1076 char f[32]; 1077 memset(f, 0, 32); 1078 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1079 if (len < 0) 1080 return len; 1081 1082 if (copy_from_user(f, &user_buffer[i], len)) 1083 return -EFAULT; 1084 i += len; 1085 if (strcmp(f, "IPSRC_RND") == 0) 1086 pkt_dev->flags |= F_IPSRC_RND; 1087 1088 else if (strcmp(f, "!IPSRC_RND") == 0) 1089 pkt_dev->flags &= ~F_IPSRC_RND; 1090 1091 else if (strcmp(f, "TXSIZE_RND") == 0) 1092 pkt_dev->flags |= F_TXSIZE_RND; 1093 1094 else if (strcmp(f, "!TXSIZE_RND") == 0) 1095 pkt_dev->flags &= ~F_TXSIZE_RND; 1096 1097 else if (strcmp(f, "IPDST_RND") == 0) 1098 pkt_dev->flags |= F_IPDST_RND; 1099 1100 else if (strcmp(f, "!IPDST_RND") == 0) 1101 pkt_dev->flags &= ~F_IPDST_RND; 1102 1103 else if (strcmp(f, "UDPSRC_RND") == 0) 1104 pkt_dev->flags |= F_UDPSRC_RND; 1105 1106 else if (strcmp(f, "!UDPSRC_RND") == 0) 1107 pkt_dev->flags &= ~F_UDPSRC_RND; 1108 1109 else if (strcmp(f, "UDPDST_RND") == 0) 1110 pkt_dev->flags |= F_UDPDST_RND; 1111 1112 else if (strcmp(f, "!UDPDST_RND") == 0) 1113 pkt_dev->flags &= ~F_UDPDST_RND; 1114 1115 else if (strcmp(f, "MACSRC_RND") == 0) 1116 pkt_dev->flags |= F_MACSRC_RND; 1117 1118 else if (strcmp(f, "!MACSRC_RND") == 0) 1119 pkt_dev->flags &= ~F_MACSRC_RND; 1120 1121 else if (strcmp(f, "MACDST_RND") == 0) 1122 pkt_dev->flags |= F_MACDST_RND; 1123 1124 else if (strcmp(f, "!MACDST_RND") == 0) 1125 pkt_dev->flags &= ~F_MACDST_RND; 1126 1127 else if (strcmp(f, "MPLS_RND") == 0) 1128 pkt_dev->flags |= F_MPLS_RND; 1129 1130 else if (strcmp(f, "!MPLS_RND") == 0) 1131 pkt_dev->flags &= ~F_MPLS_RND; 1132 1133 else if (strcmp(f, "VID_RND") == 0) 1134 pkt_dev->flags |= F_VID_RND; 1135 1136 else if (strcmp(f, "!VID_RND") == 0) 1137 pkt_dev->flags &= ~F_VID_RND; 1138 1139 else if (strcmp(f, "SVID_RND") == 0) 1140 pkt_dev->flags |= F_SVID_RND; 1141 1142 else if (strcmp(f, "!SVID_RND") == 0) 1143 pkt_dev->flags &= ~F_SVID_RND; 1144 1145 else if (strcmp(f, "FLOW_SEQ") == 0) 1146 pkt_dev->flags |= F_FLOW_SEQ; 1147 1148 else if (strcmp(f, "QUEUE_MAP_RND") == 0) 1149 pkt_dev->flags |= F_QUEUE_MAP_RND; 1150 1151 else if (strcmp(f, "!QUEUE_MAP_RND") == 0) 1152 pkt_dev->flags &= ~F_QUEUE_MAP_RND; 1153 1154 else if (strcmp(f, "QUEUE_MAP_CPU") == 0) 1155 pkt_dev->flags |= F_QUEUE_MAP_CPU; 1156 1157 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0) 1158 pkt_dev->flags &= ~F_QUEUE_MAP_CPU; 1159 #ifdef CONFIG_XFRM 1160 else if (strcmp(f, "IPSEC") == 0) 1161 pkt_dev->flags |= F_IPSEC_ON; 1162 #endif 1163 1164 else if (strcmp(f, "!IPV6") == 0) 1165 pkt_dev->flags &= ~F_IPV6; 1166 1167 else { 1168 sprintf(pg_result, 1169 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1170 f, 1171 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1172 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC\n"); 1173 return count; 1174 } 1175 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1176 return count; 1177 } 1178 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1179 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1180 if (len < 0) 1181 return len; 1182 1183 if (copy_from_user(buf, &user_buffer[i], len)) 1184 return -EFAULT; 1185 buf[len] = 0; 1186 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1187 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1188 strncpy(pkt_dev->dst_min, buf, len); 1189 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1190 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1191 } 1192 if (debug) 1193 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n", 1194 pkt_dev->dst_min); 1195 i += len; 1196 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1197 return count; 1198 } 1199 if (!strcmp(name, "dst_max")) { 1200 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1201 if (len < 0) 1202 return len; 1203 1204 1205 if (copy_from_user(buf, &user_buffer[i], len)) 1206 return -EFAULT; 1207 1208 buf[len] = 0; 1209 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1210 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1211 strncpy(pkt_dev->dst_max, buf, len); 1212 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1213 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1214 } 1215 if (debug) 1216 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n", 1217 pkt_dev->dst_max); 1218 i += len; 1219 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1220 return count; 1221 } 1222 if (!strcmp(name, "dst6")) { 1223 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1224 if (len < 0) 1225 return len; 1226 1227 pkt_dev->flags |= F_IPV6; 1228 1229 if (copy_from_user(buf, &user_buffer[i], len)) 1230 return -EFAULT; 1231 buf[len] = 0; 1232 1233 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1234 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1235 1236 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr); 1237 1238 if (debug) 1239 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf); 1240 1241 i += len; 1242 sprintf(pg_result, "OK: dst6=%s", buf); 1243 return count; 1244 } 1245 if (!strcmp(name, "dst6_min")) { 1246 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1247 if (len < 0) 1248 return len; 1249 1250 pkt_dev->flags |= F_IPV6; 1251 1252 if (copy_from_user(buf, &user_buffer[i], len)) 1253 return -EFAULT; 1254 buf[len] = 0; 1255 1256 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1257 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1258 1259 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, 1260 &pkt_dev->min_in6_daddr); 1261 if (debug) 1262 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf); 1263 1264 i += len; 1265 sprintf(pg_result, "OK: dst6_min=%s", buf); 1266 return count; 1267 } 1268 if (!strcmp(name, "dst6_max")) { 1269 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1270 if (len < 0) 1271 return len; 1272 1273 pkt_dev->flags |= F_IPV6; 1274 1275 if (copy_from_user(buf, &user_buffer[i], len)) 1276 return -EFAULT; 1277 buf[len] = 0; 1278 1279 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1280 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1281 1282 if (debug) 1283 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf); 1284 1285 i += len; 1286 sprintf(pg_result, "OK: dst6_max=%s", buf); 1287 return count; 1288 } 1289 if (!strcmp(name, "src6")) { 1290 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1291 if (len < 0) 1292 return len; 1293 1294 pkt_dev->flags |= F_IPV6; 1295 1296 if (copy_from_user(buf, &user_buffer[i], len)) 1297 return -EFAULT; 1298 buf[len] = 0; 1299 1300 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1301 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1302 1303 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr); 1304 1305 if (debug) 1306 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf); 1307 1308 i += len; 1309 sprintf(pg_result, "OK: src6=%s", buf); 1310 return count; 1311 } 1312 if (!strcmp(name, "src_min")) { 1313 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1314 if (len < 0) 1315 return len; 1316 1317 if (copy_from_user(buf, &user_buffer[i], len)) 1318 return -EFAULT; 1319 buf[len] = 0; 1320 if (strcmp(buf, pkt_dev->src_min) != 0) { 1321 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1322 strncpy(pkt_dev->src_min, buf, len); 1323 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1324 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1325 } 1326 if (debug) 1327 printk(KERN_DEBUG "pktgen: src_min set to: %s\n", 1328 pkt_dev->src_min); 1329 i += len; 1330 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1331 return count; 1332 } 1333 if (!strcmp(name, "src_max")) { 1334 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1335 if (len < 0) 1336 return len; 1337 1338 if (copy_from_user(buf, &user_buffer[i], len)) 1339 return -EFAULT; 1340 buf[len] = 0; 1341 if (strcmp(buf, pkt_dev->src_max) != 0) { 1342 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1343 strncpy(pkt_dev->src_max, buf, len); 1344 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1345 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1346 } 1347 if (debug) 1348 printk(KERN_DEBUG "pktgen: src_max set to: %s\n", 1349 pkt_dev->src_max); 1350 i += len; 1351 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1352 return count; 1353 } 1354 if (!strcmp(name, "dst_mac")) { 1355 char *v = valstr; 1356 unsigned char old_dmac[ETH_ALEN]; 1357 unsigned char *m = pkt_dev->dst_mac; 1358 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN); 1359 1360 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1361 if (len < 0) 1362 return len; 1363 1364 memset(valstr, 0, sizeof(valstr)); 1365 if (copy_from_user(valstr, &user_buffer[i], len)) 1366 return -EFAULT; 1367 i += len; 1368 1369 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) { 1370 if (*v >= '0' && *v <= '9') { 1371 *m *= 16; 1372 *m += *v - '0'; 1373 } 1374 if (*v >= 'A' && *v <= 'F') { 1375 *m *= 16; 1376 *m += *v - 'A' + 10; 1377 } 1378 if (*v >= 'a' && *v <= 'f') { 1379 *m *= 16; 1380 *m += *v - 'a' + 10; 1381 } 1382 if (*v == ':') { 1383 m++; 1384 *m = 0; 1385 } 1386 } 1387 1388 /* Set up Dest MAC */ 1389 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac)) 1390 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 1391 1392 sprintf(pg_result, "OK: dstmac"); 1393 return count; 1394 } 1395 if (!strcmp(name, "src_mac")) { 1396 char *v = valstr; 1397 unsigned char old_smac[ETH_ALEN]; 1398 unsigned char *m = pkt_dev->src_mac; 1399 1400 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN); 1401 1402 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1403 if (len < 0) 1404 return len; 1405 1406 memset(valstr, 0, sizeof(valstr)); 1407 if (copy_from_user(valstr, &user_buffer[i], len)) 1408 return -EFAULT; 1409 i += len; 1410 1411 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) { 1412 if (*v >= '0' && *v <= '9') { 1413 *m *= 16; 1414 *m += *v - '0'; 1415 } 1416 if (*v >= 'A' && *v <= 'F') { 1417 *m *= 16; 1418 *m += *v - 'A' + 10; 1419 } 1420 if (*v >= 'a' && *v <= 'f') { 1421 *m *= 16; 1422 *m += *v - 'a' + 10; 1423 } 1424 if (*v == ':') { 1425 m++; 1426 *m = 0; 1427 } 1428 } 1429 1430 /* Set up Src MAC */ 1431 if (compare_ether_addr(old_smac, pkt_dev->src_mac)) 1432 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN); 1433 1434 sprintf(pg_result, "OK: srcmac"); 1435 return count; 1436 } 1437 1438 if (!strcmp(name, "clear_counters")) { 1439 pktgen_clear_counters(pkt_dev); 1440 sprintf(pg_result, "OK: Clearing counters.\n"); 1441 return count; 1442 } 1443 1444 if (!strcmp(name, "flows")) { 1445 len = num_arg(&user_buffer[i], 10, &value); 1446 if (len < 0) 1447 return len; 1448 1449 i += len; 1450 if (value > MAX_CFLOWS) 1451 value = MAX_CFLOWS; 1452 1453 pkt_dev->cflows = value; 1454 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1455 return count; 1456 } 1457 1458 if (!strcmp(name, "flowlen")) { 1459 len = num_arg(&user_buffer[i], 10, &value); 1460 if (len < 0) 1461 return len; 1462 1463 i += len; 1464 pkt_dev->lflow = value; 1465 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1466 return count; 1467 } 1468 1469 if (!strcmp(name, "queue_map_min")) { 1470 len = num_arg(&user_buffer[i], 5, &value); 1471 if (len < 0) 1472 return len; 1473 1474 i += len; 1475 pkt_dev->queue_map_min = value; 1476 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1477 return count; 1478 } 1479 1480 if (!strcmp(name, "queue_map_max")) { 1481 len = num_arg(&user_buffer[i], 5, &value); 1482 if (len < 0) 1483 return len; 1484 1485 i += len; 1486 pkt_dev->queue_map_max = value; 1487 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1488 return count; 1489 } 1490 1491 if (!strcmp(name, "mpls")) { 1492 unsigned n, cnt; 1493 1494 len = get_labels(&user_buffer[i], pkt_dev); 1495 if (len < 0) 1496 return len; 1497 i += len; 1498 cnt = sprintf(pg_result, "OK: mpls="); 1499 for (n = 0; n < pkt_dev->nr_labels; n++) 1500 cnt += sprintf(pg_result + cnt, 1501 "%08x%s", ntohl(pkt_dev->labels[n]), 1502 n == pkt_dev->nr_labels-1 ? "" : ","); 1503 1504 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1505 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1506 pkt_dev->svlan_id = 0xffff; 1507 1508 if (debug) 1509 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n"); 1510 } 1511 return count; 1512 } 1513 1514 if (!strcmp(name, "vlan_id")) { 1515 len = num_arg(&user_buffer[i], 4, &value); 1516 if (len < 0) 1517 return len; 1518 1519 i += len; 1520 if (value <= 4095) { 1521 pkt_dev->vlan_id = value; /* turn on VLAN */ 1522 1523 if (debug) 1524 printk(KERN_DEBUG "pktgen: VLAN turned on\n"); 1525 1526 if (debug && pkt_dev->nr_labels) 1527 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1528 1529 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1530 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1531 } else { 1532 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1533 pkt_dev->svlan_id = 0xffff; 1534 1535 if (debug) 1536 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1537 } 1538 return count; 1539 } 1540 1541 if (!strcmp(name, "vlan_p")) { 1542 len = num_arg(&user_buffer[i], 1, &value); 1543 if (len < 0) 1544 return len; 1545 1546 i += len; 1547 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1548 pkt_dev->vlan_p = value; 1549 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1550 } else { 1551 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1552 } 1553 return count; 1554 } 1555 1556 if (!strcmp(name, "vlan_cfi")) { 1557 len = num_arg(&user_buffer[i], 1, &value); 1558 if (len < 0) 1559 return len; 1560 1561 i += len; 1562 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1563 pkt_dev->vlan_cfi = value; 1564 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1565 } else { 1566 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1567 } 1568 return count; 1569 } 1570 1571 if (!strcmp(name, "svlan_id")) { 1572 len = num_arg(&user_buffer[i], 4, &value); 1573 if (len < 0) 1574 return len; 1575 1576 i += len; 1577 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1578 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1579 1580 if (debug) 1581 printk(KERN_DEBUG "pktgen: SVLAN turned on\n"); 1582 1583 if (debug && pkt_dev->nr_labels) 1584 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1585 1586 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1587 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1588 } else { 1589 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1590 pkt_dev->svlan_id = 0xffff; 1591 1592 if (debug) 1593 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1594 } 1595 return count; 1596 } 1597 1598 if (!strcmp(name, "svlan_p")) { 1599 len = num_arg(&user_buffer[i], 1, &value); 1600 if (len < 0) 1601 return len; 1602 1603 i += len; 1604 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1605 pkt_dev->svlan_p = value; 1606 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1607 } else { 1608 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1609 } 1610 return count; 1611 } 1612 1613 if (!strcmp(name, "svlan_cfi")) { 1614 len = num_arg(&user_buffer[i], 1, &value); 1615 if (len < 0) 1616 return len; 1617 1618 i += len; 1619 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1620 pkt_dev->svlan_cfi = value; 1621 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1622 } else { 1623 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1624 } 1625 return count; 1626 } 1627 1628 if (!strcmp(name, "tos")) { 1629 __u32 tmp_value = 0; 1630 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1631 if (len < 0) 1632 return len; 1633 1634 i += len; 1635 if (len == 2) { 1636 pkt_dev->tos = tmp_value; 1637 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1638 } else { 1639 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1640 } 1641 return count; 1642 } 1643 1644 if (!strcmp(name, "traffic_class")) { 1645 __u32 tmp_value = 0; 1646 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1647 if (len < 0) 1648 return len; 1649 1650 i += len; 1651 if (len == 2) { 1652 pkt_dev->traffic_class = tmp_value; 1653 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1654 } else { 1655 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1656 } 1657 return count; 1658 } 1659 1660 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1661 return -EINVAL; 1662 } 1663 1664 static int pktgen_if_open(struct inode *inode, struct file *file) 1665 { 1666 return single_open(file, pktgen_if_show, PDE(inode)->data); 1667 } 1668 1669 static const struct file_operations pktgen_if_fops = { 1670 .owner = THIS_MODULE, 1671 .open = pktgen_if_open, 1672 .read = seq_read, 1673 .llseek = seq_lseek, 1674 .write = pktgen_if_write, 1675 .release = single_release, 1676 }; 1677 1678 static int pktgen_thread_show(struct seq_file *seq, void *v) 1679 { 1680 struct pktgen_thread *t = seq->private; 1681 const struct pktgen_dev *pkt_dev; 1682 1683 BUG_ON(!t); 1684 1685 seq_printf(seq, "Running: "); 1686 1687 if_lock(t); 1688 list_for_each_entry(pkt_dev, &t->if_list, list) 1689 if (pkt_dev->running) 1690 seq_printf(seq, "%s ", pkt_dev->odev->name); 1691 1692 seq_printf(seq, "\nStopped: "); 1693 1694 list_for_each_entry(pkt_dev, &t->if_list, list) 1695 if (!pkt_dev->running) 1696 seq_printf(seq, "%s ", pkt_dev->odev->name); 1697 1698 if (t->result[0]) 1699 seq_printf(seq, "\nResult: %s\n", t->result); 1700 else 1701 seq_printf(seq, "\nResult: NA\n"); 1702 1703 if_unlock(t); 1704 1705 return 0; 1706 } 1707 1708 static ssize_t pktgen_thread_write(struct file *file, 1709 const char __user * user_buffer, 1710 size_t count, loff_t * offset) 1711 { 1712 struct seq_file *seq = (struct seq_file *)file->private_data; 1713 struct pktgen_thread *t = seq->private; 1714 int i = 0, max, len, ret; 1715 char name[40]; 1716 char *pg_result; 1717 1718 if (count < 1) { 1719 // sprintf(pg_result, "Wrong command format"); 1720 return -EINVAL; 1721 } 1722 1723 max = count - i; 1724 len = count_trail_chars(&user_buffer[i], max); 1725 if (len < 0) 1726 return len; 1727 1728 i += len; 1729 1730 /* Read variable name */ 1731 1732 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1733 if (len < 0) 1734 return len; 1735 1736 memset(name, 0, sizeof(name)); 1737 if (copy_from_user(name, &user_buffer[i], len)) 1738 return -EFAULT; 1739 i += len; 1740 1741 max = count - i; 1742 len = count_trail_chars(&user_buffer[i], max); 1743 if (len < 0) 1744 return len; 1745 1746 i += len; 1747 1748 if (debug) 1749 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n", 1750 name, (unsigned long)count); 1751 1752 if (!t) { 1753 printk(KERN_ERR "pktgen: ERROR: No thread\n"); 1754 ret = -EINVAL; 1755 goto out; 1756 } 1757 1758 pg_result = &(t->result[0]); 1759 1760 if (!strcmp(name, "add_device")) { 1761 char f[32]; 1762 memset(f, 0, 32); 1763 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1764 if (len < 0) { 1765 ret = len; 1766 goto out; 1767 } 1768 if (copy_from_user(f, &user_buffer[i], len)) 1769 return -EFAULT; 1770 i += len; 1771 mutex_lock(&pktgen_thread_lock); 1772 pktgen_add_device(t, f); 1773 mutex_unlock(&pktgen_thread_lock); 1774 ret = count; 1775 sprintf(pg_result, "OK: add_device=%s", f); 1776 goto out; 1777 } 1778 1779 if (!strcmp(name, "rem_device_all")) { 1780 mutex_lock(&pktgen_thread_lock); 1781 t->control |= T_REMDEVALL; 1782 mutex_unlock(&pktgen_thread_lock); 1783 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1784 ret = count; 1785 sprintf(pg_result, "OK: rem_device_all"); 1786 goto out; 1787 } 1788 1789 if (!strcmp(name, "max_before_softirq")) { 1790 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1791 ret = count; 1792 goto out; 1793 } 1794 1795 ret = -EINVAL; 1796 out: 1797 return ret; 1798 } 1799 1800 static int pktgen_thread_open(struct inode *inode, struct file *file) 1801 { 1802 return single_open(file, pktgen_thread_show, PDE(inode)->data); 1803 } 1804 1805 static const struct file_operations pktgen_thread_fops = { 1806 .owner = THIS_MODULE, 1807 .open = pktgen_thread_open, 1808 .read = seq_read, 1809 .llseek = seq_lseek, 1810 .write = pktgen_thread_write, 1811 .release = single_release, 1812 }; 1813 1814 /* Think find or remove for NN */ 1815 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove) 1816 { 1817 struct pktgen_thread *t; 1818 struct pktgen_dev *pkt_dev = NULL; 1819 1820 list_for_each_entry(t, &pktgen_threads, th_list) { 1821 pkt_dev = pktgen_find_dev(t, ifname); 1822 if (pkt_dev) { 1823 if (remove) { 1824 if_lock(t); 1825 pkt_dev->removal_mark = 1; 1826 t->control |= T_REMDEV; 1827 if_unlock(t); 1828 } 1829 break; 1830 } 1831 } 1832 return pkt_dev; 1833 } 1834 1835 /* 1836 * mark a device for removal 1837 */ 1838 static void pktgen_mark_device(const char *ifname) 1839 { 1840 struct pktgen_dev *pkt_dev = NULL; 1841 const int max_tries = 10, msec_per_try = 125; 1842 int i = 0; 1843 1844 mutex_lock(&pktgen_thread_lock); 1845 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname); 1846 1847 while (1) { 1848 1849 pkt_dev = __pktgen_NN_threads(ifname, REMOVE); 1850 if (pkt_dev == NULL) 1851 break; /* success */ 1852 1853 mutex_unlock(&pktgen_thread_lock); 1854 pr_debug("pktgen: pktgen_mark_device waiting for %s " 1855 "to disappear....\n", ifname); 1856 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1857 mutex_lock(&pktgen_thread_lock); 1858 1859 if (++i >= max_tries) { 1860 printk(KERN_ERR "pktgen_mark_device: timed out after " 1861 "waiting %d msec for device %s to be removed\n", 1862 msec_per_try * i, ifname); 1863 break; 1864 } 1865 1866 } 1867 1868 mutex_unlock(&pktgen_thread_lock); 1869 } 1870 1871 static void pktgen_change_name(struct net_device *dev) 1872 { 1873 struct pktgen_thread *t; 1874 1875 list_for_each_entry(t, &pktgen_threads, th_list) { 1876 struct pktgen_dev *pkt_dev; 1877 1878 list_for_each_entry(pkt_dev, &t->if_list, list) { 1879 if (pkt_dev->odev != dev) 1880 continue; 1881 1882 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 1883 1884 pkt_dev->entry = proc_create_data(dev->name, 0600, 1885 pg_proc_dir, 1886 &pktgen_if_fops, 1887 pkt_dev); 1888 if (!pkt_dev->entry) 1889 printk(KERN_ERR "pktgen: can't move proc " 1890 " entry for '%s'\n", dev->name); 1891 break; 1892 } 1893 } 1894 } 1895 1896 static int pktgen_device_event(struct notifier_block *unused, 1897 unsigned long event, void *ptr) 1898 { 1899 struct net_device *dev = ptr; 1900 1901 if (!net_eq(dev_net(dev), &init_net)) 1902 return NOTIFY_DONE; 1903 1904 /* It is OK that we do not hold the group lock right now, 1905 * as we run under the RTNL lock. 1906 */ 1907 1908 switch (event) { 1909 case NETDEV_CHANGENAME: 1910 pktgen_change_name(dev); 1911 break; 1912 1913 case NETDEV_UNREGISTER: 1914 pktgen_mark_device(dev->name); 1915 break; 1916 } 1917 1918 return NOTIFY_DONE; 1919 } 1920 1921 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev, 1922 const char *ifname) 1923 { 1924 char b[IFNAMSIZ+5]; 1925 int i = 0; 1926 1927 for (i = 0; ifname[i] != '@'; i++) { 1928 if (i == IFNAMSIZ) 1929 break; 1930 1931 b[i] = ifname[i]; 1932 } 1933 b[i] = 0; 1934 1935 return dev_get_by_name(&init_net, b); 1936 } 1937 1938 1939 /* Associate pktgen_dev with a device. */ 1940 1941 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname) 1942 { 1943 struct net_device *odev; 1944 int err; 1945 1946 /* Clean old setups */ 1947 if (pkt_dev->odev) { 1948 dev_put(pkt_dev->odev); 1949 pkt_dev->odev = NULL; 1950 } 1951 1952 odev = pktgen_dev_get_by_name(pkt_dev, ifname); 1953 if (!odev) { 1954 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname); 1955 return -ENODEV; 1956 } 1957 1958 if (odev->type != ARPHRD_ETHER) { 1959 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname); 1960 err = -EINVAL; 1961 } else if (!netif_running(odev)) { 1962 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname); 1963 err = -ENETDOWN; 1964 } else { 1965 pkt_dev->odev = odev; 1966 return 0; 1967 } 1968 1969 dev_put(odev); 1970 return err; 1971 } 1972 1973 /* Read pkt_dev from the interface and set up internal pktgen_dev 1974 * structure to have the right information to create/send packets 1975 */ 1976 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 1977 { 1978 int ntxq; 1979 1980 if (!pkt_dev->odev) { 1981 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in " 1982 "setup_inject.\n"); 1983 sprintf(pkt_dev->result, 1984 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 1985 return; 1986 } 1987 1988 /* make sure that we don't pick a non-existing transmit queue */ 1989 ntxq = pkt_dev->odev->real_num_tx_queues; 1990 1991 if (ntxq <= pkt_dev->queue_map_min) { 1992 printk(KERN_WARNING "pktgen: WARNING: Requested " 1993 "queue_map_min (zero-based) (%d) exceeds valid range " 1994 "[0 - %d] for (%d) queues on %s, resetting\n", 1995 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, 1996 pkt_dev->odev->name); 1997 pkt_dev->queue_map_min = ntxq - 1; 1998 } 1999 if (pkt_dev->queue_map_max >= ntxq) { 2000 printk(KERN_WARNING "pktgen: WARNING: Requested " 2001 "queue_map_max (zero-based) (%d) exceeds valid range " 2002 "[0 - %d] for (%d) queues on %s, resetting\n", 2003 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, 2004 pkt_dev->odev->name); 2005 pkt_dev->queue_map_max = ntxq - 1; 2006 } 2007 2008 /* Default to the interface's mac if not explicitly set. */ 2009 2010 if (is_zero_ether_addr(pkt_dev->src_mac)) 2011 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN); 2012 2013 /* Set up Dest MAC */ 2014 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 2015 2016 /* Set up pkt size */ 2017 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2018 2019 if (pkt_dev->flags & F_IPV6) { 2020 /* 2021 * Skip this automatic address setting until locks or functions 2022 * gets exported 2023 */ 2024 2025 #ifdef NOTNOW 2026 int i, set = 0, err = 1; 2027 struct inet6_dev *idev; 2028 2029 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2030 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2031 set = 1; 2032 break; 2033 } 2034 2035 if (!set) { 2036 2037 /* 2038 * Use linklevel address if unconfigured. 2039 * 2040 * use ipv6_get_lladdr if/when it's get exported 2041 */ 2042 2043 rcu_read_lock(); 2044 idev = __in6_dev_get(pkt_dev->odev); 2045 if (idev) { 2046 struct inet6_ifaddr *ifp; 2047 2048 read_lock_bh(&idev->lock); 2049 for (ifp = idev->addr_list; ifp; 2050 ifp = ifp->if_next) { 2051 if (ifp->scope == IFA_LINK 2052 && !(ifp-> 2053 flags & IFA_F_TENTATIVE)) { 2054 ipv6_addr_copy(&pkt_dev-> 2055 cur_in6_saddr, 2056 &ifp->addr); 2057 err = 0; 2058 break; 2059 } 2060 } 2061 read_unlock_bh(&idev->lock); 2062 } 2063 rcu_read_unlock(); 2064 if (err) 2065 printk(KERN_ERR "pktgen: ERROR: IPv6 link " 2066 "address not availble.\n"); 2067 } 2068 #endif 2069 } else { 2070 pkt_dev->saddr_min = 0; 2071 pkt_dev->saddr_max = 0; 2072 if (strlen(pkt_dev->src_min) == 0) { 2073 2074 struct in_device *in_dev; 2075 2076 rcu_read_lock(); 2077 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2078 if (in_dev) { 2079 if (in_dev->ifa_list) { 2080 pkt_dev->saddr_min = 2081 in_dev->ifa_list->ifa_address; 2082 pkt_dev->saddr_max = pkt_dev->saddr_min; 2083 } 2084 } 2085 rcu_read_unlock(); 2086 } else { 2087 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2088 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2089 } 2090 2091 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2092 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2093 } 2094 /* Initialize current values. */ 2095 pkt_dev->cur_dst_mac_offset = 0; 2096 pkt_dev->cur_src_mac_offset = 0; 2097 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2098 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2099 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2100 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2101 pkt_dev->nflows = 0; 2102 } 2103 2104 2105 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) 2106 { 2107 ktime_t start_time, end_time; 2108 s64 remaining; 2109 struct hrtimer_sleeper t; 2110 2111 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); 2112 hrtimer_set_expires(&t.timer, spin_until); 2113 2114 remaining = ktime_to_us(hrtimer_expires_remaining(&t.timer)); 2115 if (remaining <= 0) { 2116 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2117 return; 2118 } 2119 2120 start_time = ktime_now(); 2121 if (remaining < 100) 2122 udelay(remaining); /* really small just spin */ 2123 else { 2124 /* see do_nanosleep */ 2125 hrtimer_init_sleeper(&t, current); 2126 do { 2127 set_current_state(TASK_INTERRUPTIBLE); 2128 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS); 2129 if (!hrtimer_active(&t.timer)) 2130 t.task = NULL; 2131 2132 if (likely(t.task)) 2133 schedule(); 2134 2135 hrtimer_cancel(&t.timer); 2136 } while (t.task && pkt_dev->running && !signal_pending(current)); 2137 __set_current_state(TASK_RUNNING); 2138 } 2139 end_time = ktime_now(); 2140 2141 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); 2142 pkt_dev->next_tx = ktime_add_ns(end_time, pkt_dev->delay); 2143 } 2144 2145 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2146 { 2147 pkt_dev->pkt_overhead = 0; 2148 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2149 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2150 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2151 } 2152 2153 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) 2154 { 2155 return !!(pkt_dev->flows[flow].flags & F_INIT); 2156 } 2157 2158 static inline int f_pick(struct pktgen_dev *pkt_dev) 2159 { 2160 int flow = pkt_dev->curfl; 2161 2162 if (pkt_dev->flags & F_FLOW_SEQ) { 2163 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2164 /* reset time */ 2165 pkt_dev->flows[flow].count = 0; 2166 pkt_dev->flows[flow].flags = 0; 2167 pkt_dev->curfl += 1; 2168 if (pkt_dev->curfl >= pkt_dev->cflows) 2169 pkt_dev->curfl = 0; /*reset */ 2170 } 2171 } else { 2172 flow = random32() % pkt_dev->cflows; 2173 pkt_dev->curfl = flow; 2174 2175 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2176 pkt_dev->flows[flow].count = 0; 2177 pkt_dev->flows[flow].flags = 0; 2178 } 2179 } 2180 2181 return pkt_dev->curfl; 2182 } 2183 2184 2185 #ifdef CONFIG_XFRM 2186 /* If there was already an IPSEC SA, we keep it as is, else 2187 * we go look for it ... 2188 */ 2189 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2190 { 2191 struct xfrm_state *x = pkt_dev->flows[flow].x; 2192 if (!x) { 2193 /*slow path: we dont already have xfrm_state*/ 2194 x = xfrm_stateonly_find(&init_net, 2195 (xfrm_address_t *)&pkt_dev->cur_daddr, 2196 (xfrm_address_t *)&pkt_dev->cur_saddr, 2197 AF_INET, 2198 pkt_dev->ipsmode, 2199 pkt_dev->ipsproto, 0); 2200 if (x) { 2201 pkt_dev->flows[flow].x = x; 2202 set_pkt_overhead(pkt_dev); 2203 pkt_dev->pkt_overhead += x->props.header_len; 2204 } 2205 2206 } 2207 } 2208 #endif 2209 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2210 { 2211 2212 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2213 pkt_dev->cur_queue_map = smp_processor_id(); 2214 2215 else if (pkt_dev->queue_map_min < pkt_dev->queue_map_max) { 2216 __u16 t; 2217 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2218 t = random32() % 2219 (pkt_dev->queue_map_max - 2220 pkt_dev->queue_map_min + 1) 2221 + pkt_dev->queue_map_min; 2222 } else { 2223 t = pkt_dev->cur_queue_map + 1; 2224 if (t > pkt_dev->queue_map_max) 2225 t = pkt_dev->queue_map_min; 2226 } 2227 pkt_dev->cur_queue_map = t; 2228 } 2229 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2230 } 2231 2232 /* Increment/randomize headers according to flags and current values 2233 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2234 */ 2235 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2236 { 2237 __u32 imn; 2238 __u32 imx; 2239 int flow = 0; 2240 2241 if (pkt_dev->cflows) 2242 flow = f_pick(pkt_dev); 2243 2244 /* Deal with source MAC */ 2245 if (pkt_dev->src_mac_count > 1) { 2246 __u32 mc; 2247 __u32 tmp; 2248 2249 if (pkt_dev->flags & F_MACSRC_RND) 2250 mc = random32() % pkt_dev->src_mac_count; 2251 else { 2252 mc = pkt_dev->cur_src_mac_offset++; 2253 if (pkt_dev->cur_src_mac_offset >= 2254 pkt_dev->src_mac_count) 2255 pkt_dev->cur_src_mac_offset = 0; 2256 } 2257 2258 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2259 pkt_dev->hh[11] = tmp; 2260 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2261 pkt_dev->hh[10] = tmp; 2262 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2263 pkt_dev->hh[9] = tmp; 2264 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2265 pkt_dev->hh[8] = tmp; 2266 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2267 pkt_dev->hh[7] = tmp; 2268 } 2269 2270 /* Deal with Destination MAC */ 2271 if (pkt_dev->dst_mac_count > 1) { 2272 __u32 mc; 2273 __u32 tmp; 2274 2275 if (pkt_dev->flags & F_MACDST_RND) 2276 mc = random32() % pkt_dev->dst_mac_count; 2277 2278 else { 2279 mc = pkt_dev->cur_dst_mac_offset++; 2280 if (pkt_dev->cur_dst_mac_offset >= 2281 pkt_dev->dst_mac_count) { 2282 pkt_dev->cur_dst_mac_offset = 0; 2283 } 2284 } 2285 2286 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2287 pkt_dev->hh[5] = tmp; 2288 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2289 pkt_dev->hh[4] = tmp; 2290 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2291 pkt_dev->hh[3] = tmp; 2292 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2293 pkt_dev->hh[2] = tmp; 2294 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2295 pkt_dev->hh[1] = tmp; 2296 } 2297 2298 if (pkt_dev->flags & F_MPLS_RND) { 2299 unsigned i; 2300 for (i = 0; i < pkt_dev->nr_labels; i++) 2301 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2302 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2303 ((__force __be32)random32() & 2304 htonl(0x000fffff)); 2305 } 2306 2307 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2308 pkt_dev->vlan_id = random32() & (4096-1); 2309 } 2310 2311 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2312 pkt_dev->svlan_id = random32() & (4096 - 1); 2313 } 2314 2315 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2316 if (pkt_dev->flags & F_UDPSRC_RND) 2317 pkt_dev->cur_udp_src = random32() % 2318 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2319 + pkt_dev->udp_src_min; 2320 2321 else { 2322 pkt_dev->cur_udp_src++; 2323 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2324 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2325 } 2326 } 2327 2328 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2329 if (pkt_dev->flags & F_UDPDST_RND) { 2330 pkt_dev->cur_udp_dst = random32() % 2331 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2332 + pkt_dev->udp_dst_min; 2333 } else { 2334 pkt_dev->cur_udp_dst++; 2335 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2336 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2337 } 2338 } 2339 2340 if (!(pkt_dev->flags & F_IPV6)) { 2341 2342 imn = ntohl(pkt_dev->saddr_min); 2343 imx = ntohl(pkt_dev->saddr_max); 2344 if (imn < imx) { 2345 __u32 t; 2346 if (pkt_dev->flags & F_IPSRC_RND) 2347 t = random32() % (imx - imn) + imn; 2348 else { 2349 t = ntohl(pkt_dev->cur_saddr); 2350 t++; 2351 if (t > imx) 2352 t = imn; 2353 2354 } 2355 pkt_dev->cur_saddr = htonl(t); 2356 } 2357 2358 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2359 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2360 } else { 2361 imn = ntohl(pkt_dev->daddr_min); 2362 imx = ntohl(pkt_dev->daddr_max); 2363 if (imn < imx) { 2364 __u32 t; 2365 __be32 s; 2366 if (pkt_dev->flags & F_IPDST_RND) { 2367 2368 t = random32() % (imx - imn) + imn; 2369 s = htonl(t); 2370 2371 while (ipv4_is_loopback(s) || 2372 ipv4_is_multicast(s) || 2373 ipv4_is_lbcast(s) || 2374 ipv4_is_zeronet(s) || 2375 ipv4_is_local_multicast(s)) { 2376 t = random32() % (imx - imn) + imn; 2377 s = htonl(t); 2378 } 2379 pkt_dev->cur_daddr = s; 2380 } else { 2381 t = ntohl(pkt_dev->cur_daddr); 2382 t++; 2383 if (t > imx) { 2384 t = imn; 2385 } 2386 pkt_dev->cur_daddr = htonl(t); 2387 } 2388 } 2389 if (pkt_dev->cflows) { 2390 pkt_dev->flows[flow].flags |= F_INIT; 2391 pkt_dev->flows[flow].cur_daddr = 2392 pkt_dev->cur_daddr; 2393 #ifdef CONFIG_XFRM 2394 if (pkt_dev->flags & F_IPSEC_ON) 2395 get_ipsec_sa(pkt_dev, flow); 2396 #endif 2397 pkt_dev->nflows++; 2398 } 2399 } 2400 } else { /* IPV6 * */ 2401 2402 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 && 2403 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 && 2404 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 && 2405 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ; 2406 else { 2407 int i; 2408 2409 /* Only random destinations yet */ 2410 2411 for (i = 0; i < 4; i++) { 2412 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2413 (((__force __be32)random32() | 2414 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2415 pkt_dev->max_in6_daddr.s6_addr32[i]); 2416 } 2417 } 2418 } 2419 2420 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2421 __u32 t; 2422 if (pkt_dev->flags & F_TXSIZE_RND) { 2423 t = random32() % 2424 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2425 + pkt_dev->min_pkt_size; 2426 } else { 2427 t = pkt_dev->cur_pkt_size + 1; 2428 if (t > pkt_dev->max_pkt_size) 2429 t = pkt_dev->min_pkt_size; 2430 } 2431 pkt_dev->cur_pkt_size = t; 2432 } 2433 2434 set_cur_queue_map(pkt_dev); 2435 2436 pkt_dev->flows[flow].count++; 2437 } 2438 2439 2440 #ifdef CONFIG_XFRM 2441 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2442 { 2443 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2444 int err = 0; 2445 struct iphdr *iph; 2446 2447 if (!x) 2448 return 0; 2449 /* XXX: we dont support tunnel mode for now until 2450 * we resolve the dst issue */ 2451 if (x->props.mode != XFRM_MODE_TRANSPORT) 2452 return 0; 2453 2454 spin_lock(&x->lock); 2455 iph = ip_hdr(skb); 2456 2457 err = x->outer_mode->output(x, skb); 2458 if (err) 2459 goto error; 2460 err = x->type->output(x, skb); 2461 if (err) 2462 goto error; 2463 2464 x->curlft.bytes += skb->len; 2465 x->curlft.packets++; 2466 error: 2467 spin_unlock(&x->lock); 2468 return err; 2469 } 2470 2471 static void free_SAs(struct pktgen_dev *pkt_dev) 2472 { 2473 if (pkt_dev->cflows) { 2474 /* let go of the SAs if we have them */ 2475 int i = 0; 2476 for (; i < pkt_dev->cflows; i++) { 2477 struct xfrm_state *x = pkt_dev->flows[i].x; 2478 if (x) { 2479 xfrm_state_put(x); 2480 pkt_dev->flows[i].x = NULL; 2481 } 2482 } 2483 } 2484 } 2485 2486 static int process_ipsec(struct pktgen_dev *pkt_dev, 2487 struct sk_buff *skb, __be16 protocol) 2488 { 2489 if (pkt_dev->flags & F_IPSEC_ON) { 2490 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2491 int nhead = 0; 2492 if (x) { 2493 int ret; 2494 __u8 *eth; 2495 nhead = x->props.header_len - skb_headroom(skb); 2496 if (nhead > 0) { 2497 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2498 if (ret < 0) { 2499 printk(KERN_ERR "Error expanding " 2500 "ipsec packet %d\n", ret); 2501 goto err; 2502 } 2503 } 2504 2505 /* ipsec is not expecting ll header */ 2506 skb_pull(skb, ETH_HLEN); 2507 ret = pktgen_output_ipsec(skb, pkt_dev); 2508 if (ret) { 2509 printk(KERN_ERR "Error creating ipsec " 2510 "packet %d\n", ret); 2511 goto err; 2512 } 2513 /* restore ll */ 2514 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2515 memcpy(eth, pkt_dev->hh, 12); 2516 *(u16 *) ð[12] = protocol; 2517 } 2518 } 2519 return 1; 2520 err: 2521 kfree_skb(skb); 2522 return 0; 2523 } 2524 #endif 2525 2526 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2527 { 2528 unsigned i; 2529 for (i = 0; i < pkt_dev->nr_labels; i++) 2530 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2531 2532 mpls--; 2533 *mpls |= MPLS_STACK_BOTTOM; 2534 } 2535 2536 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2537 unsigned int prio) 2538 { 2539 return htons(id | (cfi << 12) | (prio << 13)); 2540 } 2541 2542 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2543 struct pktgen_dev *pkt_dev) 2544 { 2545 struct sk_buff *skb = NULL; 2546 __u8 *eth; 2547 struct udphdr *udph; 2548 int datalen, iplen; 2549 struct iphdr *iph; 2550 struct pktgen_hdr *pgh = NULL; 2551 __be16 protocol = htons(ETH_P_IP); 2552 __be32 *mpls; 2553 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2554 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2555 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2556 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2557 u16 queue_map; 2558 2559 if (pkt_dev->nr_labels) 2560 protocol = htons(ETH_P_MPLS_UC); 2561 2562 if (pkt_dev->vlan_id != 0xffff) 2563 protocol = htons(ETH_P_8021Q); 2564 2565 /* Update any of the values, used when we're incrementing various 2566 * fields. 2567 */ 2568 queue_map = pkt_dev->cur_queue_map; 2569 mod_cur_headers(pkt_dev); 2570 2571 datalen = (odev->hard_header_len + 16) & ~0xf; 2572 skb = __netdev_alloc_skb(odev, 2573 pkt_dev->cur_pkt_size + 64 2574 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT); 2575 if (!skb) { 2576 sprintf(pkt_dev->result, "No memory"); 2577 return NULL; 2578 } 2579 2580 skb_reserve(skb, datalen); 2581 2582 /* Reserve for ethernet and IP header */ 2583 eth = (__u8 *) skb_push(skb, 14); 2584 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2585 if (pkt_dev->nr_labels) 2586 mpls_push(mpls, pkt_dev); 2587 2588 if (pkt_dev->vlan_id != 0xffff) { 2589 if (pkt_dev->svlan_id != 0xffff) { 2590 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2591 *svlan_tci = build_tci(pkt_dev->svlan_id, 2592 pkt_dev->svlan_cfi, 2593 pkt_dev->svlan_p); 2594 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2595 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2596 } 2597 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2598 *vlan_tci = build_tci(pkt_dev->vlan_id, 2599 pkt_dev->vlan_cfi, 2600 pkt_dev->vlan_p); 2601 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2602 *vlan_encapsulated_proto = htons(ETH_P_IP); 2603 } 2604 2605 skb->network_header = skb->tail; 2606 skb->transport_header = skb->network_header + sizeof(struct iphdr); 2607 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr)); 2608 skb_set_queue_mapping(skb, queue_map); 2609 iph = ip_hdr(skb); 2610 udph = udp_hdr(skb); 2611 2612 memcpy(eth, pkt_dev->hh, 12); 2613 *(__be16 *) & eth[12] = protocol; 2614 2615 /* Eth + IPh + UDPh + mpls */ 2616 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2617 pkt_dev->pkt_overhead; 2618 if (datalen < sizeof(struct pktgen_hdr)) 2619 datalen = sizeof(struct pktgen_hdr); 2620 2621 udph->source = htons(pkt_dev->cur_udp_src); 2622 udph->dest = htons(pkt_dev->cur_udp_dst); 2623 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2624 udph->check = 0; /* No checksum */ 2625 2626 iph->ihl = 5; 2627 iph->version = 4; 2628 iph->ttl = 32; 2629 iph->tos = pkt_dev->tos; 2630 iph->protocol = IPPROTO_UDP; /* UDP */ 2631 iph->saddr = pkt_dev->cur_saddr; 2632 iph->daddr = pkt_dev->cur_daddr; 2633 iph->frag_off = 0; 2634 iplen = 20 + 8 + datalen; 2635 iph->tot_len = htons(iplen); 2636 iph->check = 0; 2637 iph->check = ip_fast_csum((void *)iph, iph->ihl); 2638 skb->protocol = protocol; 2639 skb->mac_header = (skb->network_header - ETH_HLEN - 2640 pkt_dev->pkt_overhead); 2641 skb->dev = odev; 2642 skb->pkt_type = PACKET_HOST; 2643 2644 if (pkt_dev->nfrags <= 0) 2645 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 2646 else { 2647 int frags = pkt_dev->nfrags; 2648 int i; 2649 2650 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 2651 2652 if (frags > MAX_SKB_FRAGS) 2653 frags = MAX_SKB_FRAGS; 2654 if (datalen > frags * PAGE_SIZE) { 2655 skb_put(skb, datalen - frags * PAGE_SIZE); 2656 datalen = frags * PAGE_SIZE; 2657 } 2658 2659 i = 0; 2660 while (datalen > 0) { 2661 struct page *page = alloc_pages(GFP_KERNEL, 0); 2662 skb_shinfo(skb)->frags[i].page = page; 2663 skb_shinfo(skb)->frags[i].page_offset = 0; 2664 skb_shinfo(skb)->frags[i].size = 2665 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 2666 datalen -= skb_shinfo(skb)->frags[i].size; 2667 skb->len += skb_shinfo(skb)->frags[i].size; 2668 skb->data_len += skb_shinfo(skb)->frags[i].size; 2669 i++; 2670 skb_shinfo(skb)->nr_frags = i; 2671 } 2672 2673 while (i < frags) { 2674 int rem; 2675 2676 if (i == 0) 2677 break; 2678 2679 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 2680 if (rem == 0) 2681 break; 2682 2683 skb_shinfo(skb)->frags[i - 1].size -= rem; 2684 2685 skb_shinfo(skb)->frags[i] = 2686 skb_shinfo(skb)->frags[i - 1]; 2687 get_page(skb_shinfo(skb)->frags[i].page); 2688 skb_shinfo(skb)->frags[i].page = 2689 skb_shinfo(skb)->frags[i - 1].page; 2690 skb_shinfo(skb)->frags[i].page_offset += 2691 skb_shinfo(skb)->frags[i - 1].size; 2692 skb_shinfo(skb)->frags[i].size = rem; 2693 i++; 2694 skb_shinfo(skb)->nr_frags = i; 2695 } 2696 } 2697 2698 /* Stamp the time, and sequence number, 2699 * convert them to network byte order 2700 */ 2701 if (pgh) { 2702 struct timeval timestamp; 2703 2704 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2705 pgh->seq_num = htonl(pkt_dev->seq_num); 2706 2707 do_gettimeofday(×tamp); 2708 pgh->tv_sec = htonl(timestamp.tv_sec); 2709 pgh->tv_usec = htonl(timestamp.tv_usec); 2710 } 2711 2712 #ifdef CONFIG_XFRM 2713 if (!process_ipsec(pkt_dev, skb, protocol)) 2714 return NULL; 2715 #endif 2716 2717 return skb; 2718 } 2719 2720 /* 2721 * scan_ip6, fmt_ip taken from dietlibc-0.21 2722 * Author Felix von Leitner <felix-dietlibc@fefe.de> 2723 * 2724 * Slightly modified for kernel. 2725 * Should be candidate for net/ipv4/utils.c 2726 * --ro 2727 */ 2728 2729 static unsigned int scan_ip6(const char *s, char ip[16]) 2730 { 2731 unsigned int i; 2732 unsigned int len = 0; 2733 unsigned long u; 2734 char suffix[16]; 2735 unsigned int prefixlen = 0; 2736 unsigned int suffixlen = 0; 2737 __be32 tmp; 2738 char *pos; 2739 2740 for (i = 0; i < 16; i++) 2741 ip[i] = 0; 2742 2743 for (;;) { 2744 if (*s == ':') { 2745 len++; 2746 if (s[1] == ':') { /* Found "::", skip to part 2 */ 2747 s += 2; 2748 len++; 2749 break; 2750 } 2751 s++; 2752 } 2753 2754 u = simple_strtoul(s, &pos, 16); 2755 i = pos - s; 2756 if (!i) 2757 return 0; 2758 if (prefixlen == 12 && s[i] == '.') { 2759 2760 /* the last 4 bytes may be written as IPv4 address */ 2761 2762 tmp = in_aton(s); 2763 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp)); 2764 return i + len; 2765 } 2766 ip[prefixlen++] = (u >> 8); 2767 ip[prefixlen++] = (u & 255); 2768 s += i; 2769 len += i; 2770 if (prefixlen == 16) 2771 return len; 2772 } 2773 2774 /* part 2, after "::" */ 2775 for (;;) { 2776 if (*s == ':') { 2777 if (suffixlen == 0) 2778 break; 2779 s++; 2780 len++; 2781 } else if (suffixlen != 0) 2782 break; 2783 2784 u = simple_strtol(s, &pos, 16); 2785 i = pos - s; 2786 if (!i) { 2787 if (*s) 2788 len--; 2789 break; 2790 } 2791 if (suffixlen + prefixlen <= 12 && s[i] == '.') { 2792 tmp = in_aton(s); 2793 memcpy((struct in_addr *)(suffix + suffixlen), &tmp, 2794 sizeof(tmp)); 2795 suffixlen += 4; 2796 len += strlen(s); 2797 break; 2798 } 2799 suffix[suffixlen++] = (u >> 8); 2800 suffix[suffixlen++] = (u & 255); 2801 s += i; 2802 len += i; 2803 if (prefixlen + suffixlen == 16) 2804 break; 2805 } 2806 for (i = 0; i < suffixlen; i++) 2807 ip[16 - suffixlen + i] = suffix[i]; 2808 return len; 2809 } 2810 2811 static char tohex(char hexdigit) 2812 { 2813 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0'; 2814 } 2815 2816 static int fmt_xlong(char *s, unsigned int i) 2817 { 2818 char *bak = s; 2819 *s = tohex((i >> 12) & 0xf); 2820 if (s != bak || *s != '0') 2821 ++s; 2822 *s = tohex((i >> 8) & 0xf); 2823 if (s != bak || *s != '0') 2824 ++s; 2825 *s = tohex((i >> 4) & 0xf); 2826 if (s != bak || *s != '0') 2827 ++s; 2828 *s = tohex(i & 0xf); 2829 return s - bak + 1; 2830 } 2831 2832 static unsigned int fmt_ip6(char *s, const char ip[16]) 2833 { 2834 unsigned int len; 2835 unsigned int i; 2836 unsigned int temp; 2837 unsigned int compressing; 2838 int j; 2839 2840 len = 0; 2841 compressing = 0; 2842 for (j = 0; j < 16; j += 2) { 2843 2844 #ifdef V4MAPPEDPREFIX 2845 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) { 2846 inet_ntoa_r(*(struct in_addr *)(ip + 12), s); 2847 temp = strlen(s); 2848 return len + temp; 2849 } 2850 #endif 2851 temp = ((unsigned long)(unsigned char)ip[j] << 8) + 2852 (unsigned long)(unsigned char)ip[j + 1]; 2853 if (temp == 0) { 2854 if (!compressing) { 2855 compressing = 1; 2856 if (j == 0) { 2857 *s++ = ':'; 2858 ++len; 2859 } 2860 } 2861 } else { 2862 if (compressing) { 2863 compressing = 0; 2864 *s++ = ':'; 2865 ++len; 2866 } 2867 i = fmt_xlong(s, temp); 2868 len += i; 2869 s += i; 2870 if (j < 14) { 2871 *s++ = ':'; 2872 ++len; 2873 } 2874 } 2875 } 2876 if (compressing) { 2877 *s++ = ':'; 2878 ++len; 2879 } 2880 *s = 0; 2881 return len; 2882 } 2883 2884 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2885 struct pktgen_dev *pkt_dev) 2886 { 2887 struct sk_buff *skb = NULL; 2888 __u8 *eth; 2889 struct udphdr *udph; 2890 int datalen; 2891 struct ipv6hdr *iph; 2892 struct pktgen_hdr *pgh = NULL; 2893 __be16 protocol = htons(ETH_P_IPV6); 2894 __be32 *mpls; 2895 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2896 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2897 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2898 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2899 u16 queue_map; 2900 2901 if (pkt_dev->nr_labels) 2902 protocol = htons(ETH_P_MPLS_UC); 2903 2904 if (pkt_dev->vlan_id != 0xffff) 2905 protocol = htons(ETH_P_8021Q); 2906 2907 /* Update any of the values, used when we're incrementing various 2908 * fields. 2909 */ 2910 queue_map = pkt_dev->cur_queue_map; 2911 mod_cur_headers(pkt_dev); 2912 2913 skb = __netdev_alloc_skb(odev, 2914 pkt_dev->cur_pkt_size + 64 2915 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT); 2916 if (!skb) { 2917 sprintf(pkt_dev->result, "No memory"); 2918 return NULL; 2919 } 2920 2921 skb_reserve(skb, 16); 2922 2923 /* Reserve for ethernet and IP header */ 2924 eth = (__u8 *) skb_push(skb, 14); 2925 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2926 if (pkt_dev->nr_labels) 2927 mpls_push(mpls, pkt_dev); 2928 2929 if (pkt_dev->vlan_id != 0xffff) { 2930 if (pkt_dev->svlan_id != 0xffff) { 2931 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2932 *svlan_tci = build_tci(pkt_dev->svlan_id, 2933 pkt_dev->svlan_cfi, 2934 pkt_dev->svlan_p); 2935 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2936 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2937 } 2938 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2939 *vlan_tci = build_tci(pkt_dev->vlan_id, 2940 pkt_dev->vlan_cfi, 2941 pkt_dev->vlan_p); 2942 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2943 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 2944 } 2945 2946 skb->network_header = skb->tail; 2947 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr); 2948 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr)); 2949 skb_set_queue_mapping(skb, queue_map); 2950 iph = ipv6_hdr(skb); 2951 udph = udp_hdr(skb); 2952 2953 memcpy(eth, pkt_dev->hh, 12); 2954 *(__be16 *) ð[12] = protocol; 2955 2956 /* Eth + IPh + UDPh + mpls */ 2957 datalen = pkt_dev->cur_pkt_size - 14 - 2958 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 2959 pkt_dev->pkt_overhead; 2960 2961 if (datalen < sizeof(struct pktgen_hdr)) { 2962 datalen = sizeof(struct pktgen_hdr); 2963 if (net_ratelimit()) 2964 printk(KERN_INFO "pktgen: increased datalen to %d\n", 2965 datalen); 2966 } 2967 2968 udph->source = htons(pkt_dev->cur_udp_src); 2969 udph->dest = htons(pkt_dev->cur_udp_dst); 2970 udph->len = htons(datalen + sizeof(struct udphdr)); 2971 udph->check = 0; /* No checksum */ 2972 2973 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 2974 2975 if (pkt_dev->traffic_class) { 2976 /* Version + traffic class + flow (0) */ 2977 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 2978 } 2979 2980 iph->hop_limit = 32; 2981 2982 iph->payload_len = htons(sizeof(struct udphdr) + datalen); 2983 iph->nexthdr = IPPROTO_UDP; 2984 2985 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr); 2986 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr); 2987 2988 skb->mac_header = (skb->network_header - ETH_HLEN - 2989 pkt_dev->pkt_overhead); 2990 skb->protocol = protocol; 2991 skb->dev = odev; 2992 skb->pkt_type = PACKET_HOST; 2993 2994 if (pkt_dev->nfrags <= 0) 2995 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 2996 else { 2997 int frags = pkt_dev->nfrags; 2998 int i; 2999 3000 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 3001 3002 if (frags > MAX_SKB_FRAGS) 3003 frags = MAX_SKB_FRAGS; 3004 if (datalen > frags * PAGE_SIZE) { 3005 skb_put(skb, datalen - frags * PAGE_SIZE); 3006 datalen = frags * PAGE_SIZE; 3007 } 3008 3009 i = 0; 3010 while (datalen > 0) { 3011 struct page *page = alloc_pages(GFP_KERNEL, 0); 3012 skb_shinfo(skb)->frags[i].page = page; 3013 skb_shinfo(skb)->frags[i].page_offset = 0; 3014 skb_shinfo(skb)->frags[i].size = 3015 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 3016 datalen -= skb_shinfo(skb)->frags[i].size; 3017 skb->len += skb_shinfo(skb)->frags[i].size; 3018 skb->data_len += skb_shinfo(skb)->frags[i].size; 3019 i++; 3020 skb_shinfo(skb)->nr_frags = i; 3021 } 3022 3023 while (i < frags) { 3024 int rem; 3025 3026 if (i == 0) 3027 break; 3028 3029 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 3030 if (rem == 0) 3031 break; 3032 3033 skb_shinfo(skb)->frags[i - 1].size -= rem; 3034 3035 skb_shinfo(skb)->frags[i] = 3036 skb_shinfo(skb)->frags[i - 1]; 3037 get_page(skb_shinfo(skb)->frags[i].page); 3038 skb_shinfo(skb)->frags[i].page = 3039 skb_shinfo(skb)->frags[i - 1].page; 3040 skb_shinfo(skb)->frags[i].page_offset += 3041 skb_shinfo(skb)->frags[i - 1].size; 3042 skb_shinfo(skb)->frags[i].size = rem; 3043 i++; 3044 skb_shinfo(skb)->nr_frags = i; 3045 } 3046 } 3047 3048 /* Stamp the time, and sequence number, 3049 * convert them to network byte order 3050 * should we update cloned packets too ? 3051 */ 3052 if (pgh) { 3053 struct timeval timestamp; 3054 3055 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 3056 pgh->seq_num = htonl(pkt_dev->seq_num); 3057 3058 do_gettimeofday(×tamp); 3059 pgh->tv_sec = htonl(timestamp.tv_sec); 3060 pgh->tv_usec = htonl(timestamp.tv_usec); 3061 } 3062 /* pkt_dev->seq_num++; FF: you really mean this? */ 3063 3064 return skb; 3065 } 3066 3067 static struct sk_buff *fill_packet(struct net_device *odev, 3068 struct pktgen_dev *pkt_dev) 3069 { 3070 if (pkt_dev->flags & F_IPV6) 3071 return fill_packet_ipv6(odev, pkt_dev); 3072 else 3073 return fill_packet_ipv4(odev, pkt_dev); 3074 } 3075 3076 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 3077 { 3078 pkt_dev->seq_num = 1; 3079 pkt_dev->idle_acc = 0; 3080 pkt_dev->sofar = 0; 3081 pkt_dev->tx_bytes = 0; 3082 pkt_dev->errors = 0; 3083 } 3084 3085 /* Set up structure for sending pkts, clear counters */ 3086 3087 static void pktgen_run(struct pktgen_thread *t) 3088 { 3089 struct pktgen_dev *pkt_dev; 3090 int started = 0; 3091 3092 pr_debug("pktgen: entering pktgen_run. %p\n", t); 3093 3094 if_lock(t); 3095 list_for_each_entry(pkt_dev, &t->if_list, list) { 3096 3097 /* 3098 * setup odev and create initial packet. 3099 */ 3100 pktgen_setup_inject(pkt_dev); 3101 3102 if (pkt_dev->odev) { 3103 pktgen_clear_counters(pkt_dev); 3104 pkt_dev->running = 1; /* Cranke yeself! */ 3105 pkt_dev->skb = NULL; 3106 pkt_dev->started_at = 3107 pkt_dev->next_tx = ktime_now(); 3108 3109 set_pkt_overhead(pkt_dev); 3110 3111 strcpy(pkt_dev->result, "Starting"); 3112 started++; 3113 } else 3114 strcpy(pkt_dev->result, "Error starting"); 3115 } 3116 if_unlock(t); 3117 if (started) 3118 t->control &= ~(T_STOP); 3119 } 3120 3121 static void pktgen_stop_all_threads_ifs(void) 3122 { 3123 struct pktgen_thread *t; 3124 3125 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n"); 3126 3127 mutex_lock(&pktgen_thread_lock); 3128 3129 list_for_each_entry(t, &pktgen_threads, th_list) 3130 t->control |= T_STOP; 3131 3132 mutex_unlock(&pktgen_thread_lock); 3133 } 3134 3135 static int thread_is_running(const struct pktgen_thread *t) 3136 { 3137 const struct pktgen_dev *pkt_dev; 3138 3139 list_for_each_entry(pkt_dev, &t->if_list, list) 3140 if (pkt_dev->running) 3141 return 1; 3142 return 0; 3143 } 3144 3145 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3146 { 3147 if_lock(t); 3148 3149 while (thread_is_running(t)) { 3150 3151 if_unlock(t); 3152 3153 msleep_interruptible(100); 3154 3155 if (signal_pending(current)) 3156 goto signal; 3157 if_lock(t); 3158 } 3159 if_unlock(t); 3160 return 1; 3161 signal: 3162 return 0; 3163 } 3164 3165 static int pktgen_wait_all_threads_run(void) 3166 { 3167 struct pktgen_thread *t; 3168 int sig = 1; 3169 3170 mutex_lock(&pktgen_thread_lock); 3171 3172 list_for_each_entry(t, &pktgen_threads, th_list) { 3173 sig = pktgen_wait_thread_run(t); 3174 if (sig == 0) 3175 break; 3176 } 3177 3178 if (sig == 0) 3179 list_for_each_entry(t, &pktgen_threads, th_list) 3180 t->control |= (T_STOP); 3181 3182 mutex_unlock(&pktgen_thread_lock); 3183 return sig; 3184 } 3185 3186 static void pktgen_run_all_threads(void) 3187 { 3188 struct pktgen_thread *t; 3189 3190 pr_debug("pktgen: entering pktgen_run_all_threads.\n"); 3191 3192 mutex_lock(&pktgen_thread_lock); 3193 3194 list_for_each_entry(t, &pktgen_threads, th_list) 3195 t->control |= (T_RUN); 3196 3197 mutex_unlock(&pktgen_thread_lock); 3198 3199 /* Propagate thread->control */ 3200 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3201 3202 pktgen_wait_all_threads_run(); 3203 } 3204 3205 static void pktgen_reset_all_threads(void) 3206 { 3207 struct pktgen_thread *t; 3208 3209 pr_debug("pktgen: entering pktgen_reset_all_threads.\n"); 3210 3211 mutex_lock(&pktgen_thread_lock); 3212 3213 list_for_each_entry(t, &pktgen_threads, th_list) 3214 t->control |= (T_REMDEVALL); 3215 3216 mutex_unlock(&pktgen_thread_lock); 3217 3218 /* Propagate thread->control */ 3219 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3220 3221 pktgen_wait_all_threads_run(); 3222 } 3223 3224 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3225 { 3226 __u64 bps, mbps, pps; 3227 char *p = pkt_dev->result; 3228 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3229 pkt_dev->started_at); 3230 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3231 3232 p += sprintf(p, "OK: %llu(c%llu+d%llu) nsec, %llu (%dbyte,%dfrags)\n", 3233 (unsigned long long)ktime_to_us(elapsed), 3234 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3235 (unsigned long long)ktime_to_us(idle), 3236 (unsigned long long)pkt_dev->sofar, 3237 pkt_dev->cur_pkt_size, nr_frags); 3238 3239 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3240 ktime_to_ns(elapsed)); 3241 3242 bps = pps * 8 * pkt_dev->cur_pkt_size; 3243 3244 mbps = bps; 3245 do_div(mbps, 1000000); 3246 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3247 (unsigned long long)pps, 3248 (unsigned long long)mbps, 3249 (unsigned long long)bps, 3250 (unsigned long long)pkt_dev->errors); 3251 } 3252 3253 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3254 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3255 { 3256 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3257 3258 if (!pkt_dev->running) { 3259 printk(KERN_WARNING "pktgen: interface: %s is already " 3260 "stopped\n", pkt_dev->odev->name); 3261 return -EINVAL; 3262 } 3263 3264 kfree_skb(pkt_dev->skb); 3265 pkt_dev->skb = NULL; 3266 pkt_dev->stopped_at = ktime_now(); 3267 pkt_dev->running = 0; 3268 3269 show_results(pkt_dev, nr_frags); 3270 3271 return 0; 3272 } 3273 3274 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3275 { 3276 struct pktgen_dev *pkt_dev, *best = NULL; 3277 3278 if_lock(t); 3279 3280 list_for_each_entry(pkt_dev, &t->if_list, list) { 3281 if (!pkt_dev->running) 3282 continue; 3283 if (best == NULL) 3284 best = pkt_dev; 3285 else if (ktime_lt(pkt_dev->next_tx, best->next_tx)) 3286 best = pkt_dev; 3287 } 3288 if_unlock(t); 3289 return best; 3290 } 3291 3292 static void pktgen_stop(struct pktgen_thread *t) 3293 { 3294 struct pktgen_dev *pkt_dev; 3295 3296 pr_debug("pktgen: entering pktgen_stop\n"); 3297 3298 if_lock(t); 3299 3300 list_for_each_entry(pkt_dev, &t->if_list, list) { 3301 pktgen_stop_device(pkt_dev); 3302 } 3303 3304 if_unlock(t); 3305 } 3306 3307 /* 3308 * one of our devices needs to be removed - find it 3309 * and remove it 3310 */ 3311 static void pktgen_rem_one_if(struct pktgen_thread *t) 3312 { 3313 struct list_head *q, *n; 3314 struct pktgen_dev *cur; 3315 3316 pr_debug("pktgen: entering pktgen_rem_one_if\n"); 3317 3318 if_lock(t); 3319 3320 list_for_each_safe(q, n, &t->if_list) { 3321 cur = list_entry(q, struct pktgen_dev, list); 3322 3323 if (!cur->removal_mark) 3324 continue; 3325 3326 kfree_skb(cur->skb); 3327 cur->skb = NULL; 3328 3329 pktgen_remove_device(t, cur); 3330 3331 break; 3332 } 3333 3334 if_unlock(t); 3335 } 3336 3337 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3338 { 3339 struct list_head *q, *n; 3340 struct pktgen_dev *cur; 3341 3342 /* Remove all devices, free mem */ 3343 3344 pr_debug("pktgen: entering pktgen_rem_all_ifs\n"); 3345 if_lock(t); 3346 3347 list_for_each_safe(q, n, &t->if_list) { 3348 cur = list_entry(q, struct pktgen_dev, list); 3349 3350 kfree_skb(cur->skb); 3351 cur->skb = NULL; 3352 3353 pktgen_remove_device(t, cur); 3354 } 3355 3356 if_unlock(t); 3357 } 3358 3359 static void pktgen_rem_thread(struct pktgen_thread *t) 3360 { 3361 /* Remove from the thread list */ 3362 3363 remove_proc_entry(t->tsk->comm, pg_proc_dir); 3364 3365 mutex_lock(&pktgen_thread_lock); 3366 3367 list_del(&t->th_list); 3368 3369 mutex_unlock(&pktgen_thread_lock); 3370 } 3371 3372 static void pktgen_resched(struct pktgen_dev *pkt_dev) 3373 { 3374 ktime_t idle_start = ktime_now(); 3375 schedule(); 3376 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3377 } 3378 3379 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) 3380 { 3381 ktime_t idle_start = ktime_now(); 3382 3383 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3384 if (signal_pending(current)) 3385 break; 3386 3387 if (need_resched()) 3388 pktgen_resched(pkt_dev); 3389 else 3390 cpu_relax(); 3391 } 3392 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3393 } 3394 3395 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3396 { 3397 struct net_device *odev = pkt_dev->odev; 3398 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *) 3399 = odev->netdev_ops->ndo_start_xmit; 3400 struct netdev_queue *txq; 3401 u16 queue_map; 3402 int ret; 3403 3404 /* If device is offline, then don't send */ 3405 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { 3406 pktgen_stop_device(pkt_dev); 3407 return; 3408 } 3409 3410 /* This is max DELAY, this has special meaning of 3411 * "never transmit" 3412 */ 3413 if (unlikely(pkt_dev->delay == ULLONG_MAX)) { 3414 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX); 3415 return; 3416 } 3417 3418 /* If no skb or clone count exhausted then get new one */ 3419 if (!pkt_dev->skb || (pkt_dev->last_ok && 3420 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { 3421 /* build a new pkt */ 3422 kfree_skb(pkt_dev->skb); 3423 3424 pkt_dev->skb = fill_packet(odev, pkt_dev); 3425 if (pkt_dev->skb == NULL) { 3426 printk(KERN_ERR "pktgen: ERROR: couldn't " 3427 "allocate skb in fill_packet.\n"); 3428 schedule(); 3429 pkt_dev->clone_count--; /* back out increment, OOM */ 3430 return; 3431 } 3432 3433 pkt_dev->allocated_skbs++; 3434 pkt_dev->clone_count = 0; /* reset counter */ 3435 } 3436 3437 if (pkt_dev->delay && pkt_dev->last_ok) 3438 spin(pkt_dev, pkt_dev->next_tx); 3439 3440 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3441 txq = netdev_get_tx_queue(odev, queue_map); 3442 3443 __netif_tx_lock_bh(txq); 3444 atomic_inc(&(pkt_dev->skb->users)); 3445 3446 if (unlikely(netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq))) 3447 ret = NETDEV_TX_BUSY; 3448 else 3449 ret = (*xmit)(pkt_dev->skb, odev); 3450 3451 switch (ret) { 3452 case NETDEV_TX_OK: 3453 txq_trans_update(txq); 3454 pkt_dev->last_ok = 1; 3455 pkt_dev->sofar++; 3456 pkt_dev->seq_num++; 3457 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size; 3458 break; 3459 default: /* Drivers are not supposed to return other values! */ 3460 if (net_ratelimit()) 3461 pr_info("pktgen: %s xmit error: %d\n", 3462 odev->name, ret); 3463 pkt_dev->errors++; 3464 /* fallthru */ 3465 case NETDEV_TX_LOCKED: 3466 case NETDEV_TX_BUSY: 3467 /* Retry it next time */ 3468 atomic_dec(&(pkt_dev->skb->users)); 3469 pkt_dev->last_ok = 0; 3470 } 3471 __netif_tx_unlock_bh(txq); 3472 3473 /* If pkt_dev->count is zero, then run forever */ 3474 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3475 pktgen_wait_for_skb(pkt_dev); 3476 3477 /* Done with this */ 3478 pktgen_stop_device(pkt_dev); 3479 } 3480 } 3481 3482 /* 3483 * Main loop of the thread goes here 3484 */ 3485 3486 static int pktgen_thread_worker(void *arg) 3487 { 3488 DEFINE_WAIT(wait); 3489 struct pktgen_thread *t = arg; 3490 struct pktgen_dev *pkt_dev = NULL; 3491 int cpu = t->cpu; 3492 3493 BUG_ON(smp_processor_id() != cpu); 3494 3495 init_waitqueue_head(&t->queue); 3496 complete(&t->start_done); 3497 3498 pr_debug("pktgen: starting pktgen/%d: pid=%d\n", 3499 cpu, task_pid_nr(current)); 3500 3501 set_current_state(TASK_INTERRUPTIBLE); 3502 3503 set_freezable(); 3504 3505 while (!kthread_should_stop()) { 3506 pkt_dev = next_to_run(t); 3507 3508 if (unlikely(!pkt_dev && t->control == 0)) { 3509 wait_event_interruptible_timeout(t->queue, 3510 t->control != 0, 3511 HZ/10); 3512 continue; 3513 } 3514 3515 __set_current_state(TASK_RUNNING); 3516 3517 if (likely(pkt_dev)) { 3518 pktgen_xmit(pkt_dev); 3519 3520 if (need_resched()) 3521 pktgen_resched(pkt_dev); 3522 else 3523 cpu_relax(); 3524 } 3525 3526 if (t->control & T_STOP) { 3527 pktgen_stop(t); 3528 t->control &= ~(T_STOP); 3529 } 3530 3531 if (t->control & T_RUN) { 3532 pktgen_run(t); 3533 t->control &= ~(T_RUN); 3534 } 3535 3536 if (t->control & T_REMDEVALL) { 3537 pktgen_rem_all_ifs(t); 3538 t->control &= ~(T_REMDEVALL); 3539 } 3540 3541 if (t->control & T_REMDEV) { 3542 pktgen_rem_one_if(t); 3543 t->control &= ~(T_REMDEV); 3544 } 3545 3546 try_to_freeze(); 3547 3548 set_current_state(TASK_INTERRUPTIBLE); 3549 } 3550 3551 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm); 3552 pktgen_stop(t); 3553 3554 pr_debug("pktgen: %s removing all device\n", t->tsk->comm); 3555 pktgen_rem_all_ifs(t); 3556 3557 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm); 3558 pktgen_rem_thread(t); 3559 3560 return 0; 3561 } 3562 3563 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3564 const char *ifname) 3565 { 3566 struct pktgen_dev *p, *pkt_dev = NULL; 3567 if_lock(t); 3568 3569 list_for_each_entry(p, &t->if_list, list) 3570 if (strncmp(p->odev->name, ifname, IFNAMSIZ) == 0) { 3571 pkt_dev = p; 3572 break; 3573 } 3574 3575 if_unlock(t); 3576 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev); 3577 return pkt_dev; 3578 } 3579 3580 /* 3581 * Adds a dev at front of if_list. 3582 */ 3583 3584 static int add_dev_to_thread(struct pktgen_thread *t, 3585 struct pktgen_dev *pkt_dev) 3586 { 3587 int rv = 0; 3588 3589 if_lock(t); 3590 3591 if (pkt_dev->pg_thread) { 3592 printk(KERN_ERR "pktgen: ERROR: already assigned " 3593 "to a thread.\n"); 3594 rv = -EBUSY; 3595 goto out; 3596 } 3597 3598 list_add(&pkt_dev->list, &t->if_list); 3599 pkt_dev->pg_thread = t; 3600 pkt_dev->running = 0; 3601 3602 out: 3603 if_unlock(t); 3604 return rv; 3605 } 3606 3607 /* Called under thread lock */ 3608 3609 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3610 { 3611 struct pktgen_dev *pkt_dev; 3612 int err; 3613 3614 /* We don't allow a device to be on several threads */ 3615 3616 pkt_dev = __pktgen_NN_threads(ifname, FIND); 3617 if (pkt_dev) { 3618 printk(KERN_ERR "pktgen: ERROR: interface already used.\n"); 3619 return -EBUSY; 3620 } 3621 3622 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL); 3623 if (!pkt_dev) 3624 return -ENOMEM; 3625 3626 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state)); 3627 if (pkt_dev->flows == NULL) { 3628 kfree(pkt_dev); 3629 return -ENOMEM; 3630 } 3631 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state)); 3632 3633 pkt_dev->removal_mark = 0; 3634 pkt_dev->min_pkt_size = ETH_ZLEN; 3635 pkt_dev->max_pkt_size = ETH_ZLEN; 3636 pkt_dev->nfrags = 0; 3637 pkt_dev->clone_skb = pg_clone_skb_d; 3638 pkt_dev->delay = pg_delay_d; 3639 pkt_dev->count = pg_count_d; 3640 pkt_dev->sofar = 0; 3641 pkt_dev->udp_src_min = 9; /* sink port */ 3642 pkt_dev->udp_src_max = 9; 3643 pkt_dev->udp_dst_min = 9; 3644 pkt_dev->udp_dst_max = 9; 3645 3646 pkt_dev->vlan_p = 0; 3647 pkt_dev->vlan_cfi = 0; 3648 pkt_dev->vlan_id = 0xffff; 3649 pkt_dev->svlan_p = 0; 3650 pkt_dev->svlan_cfi = 0; 3651 pkt_dev->svlan_id = 0xffff; 3652 3653 err = pktgen_setup_dev(pkt_dev, ifname); 3654 if (err) 3655 goto out1; 3656 3657 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir, 3658 &pktgen_if_fops, pkt_dev); 3659 if (!pkt_dev->entry) { 3660 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n", 3661 PG_PROC_DIR, ifname); 3662 err = -EINVAL; 3663 goto out2; 3664 } 3665 #ifdef CONFIG_XFRM 3666 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3667 pkt_dev->ipsproto = IPPROTO_ESP; 3668 #endif 3669 3670 return add_dev_to_thread(t, pkt_dev); 3671 out2: 3672 dev_put(pkt_dev->odev); 3673 out1: 3674 #ifdef CONFIG_XFRM 3675 free_SAs(pkt_dev); 3676 #endif 3677 vfree(pkt_dev->flows); 3678 kfree(pkt_dev); 3679 return err; 3680 } 3681 3682 static int __init pktgen_create_thread(int cpu) 3683 { 3684 struct pktgen_thread *t; 3685 struct proc_dir_entry *pe; 3686 struct task_struct *p; 3687 3688 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL); 3689 if (!t) { 3690 printk(KERN_ERR "pktgen: ERROR: out of memory, can't " 3691 "create new thread.\n"); 3692 return -ENOMEM; 3693 } 3694 3695 spin_lock_init(&t->if_lock); 3696 t->cpu = cpu; 3697 3698 INIT_LIST_HEAD(&t->if_list); 3699 3700 list_add_tail(&t->th_list, &pktgen_threads); 3701 init_completion(&t->start_done); 3702 3703 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu); 3704 if (IS_ERR(p)) { 3705 printk(KERN_ERR "pktgen: kernel_thread() failed " 3706 "for cpu %d\n", t->cpu); 3707 list_del(&t->th_list); 3708 kfree(t); 3709 return PTR_ERR(p); 3710 } 3711 kthread_bind(p, cpu); 3712 t->tsk = p; 3713 3714 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir, 3715 &pktgen_thread_fops, t); 3716 if (!pe) { 3717 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n", 3718 PG_PROC_DIR, t->tsk->comm); 3719 kthread_stop(p); 3720 list_del(&t->th_list); 3721 kfree(t); 3722 return -EINVAL; 3723 } 3724 3725 wake_up_process(p); 3726 wait_for_completion(&t->start_done); 3727 3728 return 0; 3729 } 3730 3731 /* 3732 * Removes a device from the thread if_list. 3733 */ 3734 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3735 struct pktgen_dev *pkt_dev) 3736 { 3737 struct list_head *q, *n; 3738 struct pktgen_dev *p; 3739 3740 list_for_each_safe(q, n, &t->if_list) { 3741 p = list_entry(q, struct pktgen_dev, list); 3742 if (p == pkt_dev) 3743 list_del(&p->list); 3744 } 3745 } 3746 3747 static int pktgen_remove_device(struct pktgen_thread *t, 3748 struct pktgen_dev *pkt_dev) 3749 { 3750 3751 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev); 3752 3753 if (pkt_dev->running) { 3754 printk(KERN_WARNING "pktgen: WARNING: trying to remove a " 3755 "running interface, stopping it now.\n"); 3756 pktgen_stop_device(pkt_dev); 3757 } 3758 3759 /* Dis-associate from the interface */ 3760 3761 if (pkt_dev->odev) { 3762 dev_put(pkt_dev->odev); 3763 pkt_dev->odev = NULL; 3764 } 3765 3766 /* And update the thread if_list */ 3767 3768 _rem_dev_from_if_list(t, pkt_dev); 3769 3770 if (pkt_dev->entry) 3771 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 3772 3773 #ifdef CONFIG_XFRM 3774 free_SAs(pkt_dev); 3775 #endif 3776 vfree(pkt_dev->flows); 3777 kfree(pkt_dev); 3778 return 0; 3779 } 3780 3781 static int __init pg_init(void) 3782 { 3783 int cpu; 3784 struct proc_dir_entry *pe; 3785 3786 printk(KERN_INFO "%s", version); 3787 3788 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net); 3789 if (!pg_proc_dir) 3790 return -ENODEV; 3791 3792 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops); 3793 if (pe == NULL) { 3794 printk(KERN_ERR "pktgen: ERROR: cannot create %s " 3795 "procfs entry.\n", PGCTRL); 3796 proc_net_remove(&init_net, PG_PROC_DIR); 3797 return -EINVAL; 3798 } 3799 3800 /* Register us to receive netdevice events */ 3801 register_netdevice_notifier(&pktgen_notifier_block); 3802 3803 for_each_online_cpu(cpu) { 3804 int err; 3805 3806 err = pktgen_create_thread(cpu); 3807 if (err) 3808 printk(KERN_WARNING "pktgen: WARNING: Cannot create " 3809 "thread for cpu %d (%d)\n", cpu, err); 3810 } 3811 3812 if (list_empty(&pktgen_threads)) { 3813 printk(KERN_ERR "pktgen: ERROR: Initialization failed for " 3814 "all threads\n"); 3815 unregister_netdevice_notifier(&pktgen_notifier_block); 3816 remove_proc_entry(PGCTRL, pg_proc_dir); 3817 proc_net_remove(&init_net, PG_PROC_DIR); 3818 return -ENODEV; 3819 } 3820 3821 return 0; 3822 } 3823 3824 static void __exit pg_cleanup(void) 3825 { 3826 struct pktgen_thread *t; 3827 struct list_head *q, *n; 3828 wait_queue_head_t queue; 3829 init_waitqueue_head(&queue); 3830 3831 /* Stop all interfaces & threads */ 3832 3833 list_for_each_safe(q, n, &pktgen_threads) { 3834 t = list_entry(q, struct pktgen_thread, th_list); 3835 kthread_stop(t->tsk); 3836 kfree(t); 3837 } 3838 3839 /* Un-register us from receiving netdevice events */ 3840 unregister_netdevice_notifier(&pktgen_notifier_block); 3841 3842 /* Clean up proc file system */ 3843 remove_proc_entry(PGCTRL, pg_proc_dir); 3844 proc_net_remove(&init_net, PG_PROC_DIR); 3845 } 3846 3847 module_init(pg_init); 3848 module_exit(pg_cleanup); 3849 3850 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); 3851 MODULE_DESCRIPTION("Packet Generator tool"); 3852 MODULE_LICENSE("GPL"); 3853 MODULE_VERSION(VERSION); 3854 module_param(pg_count_d, int, 0); 3855 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); 3856 module_param(pg_delay_d, int, 0); 3857 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); 3858 module_param(pg_clone_skb_d, int, 0); 3859 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); 3860 module_param(debug, int, 0); 3861 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); 3862