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 */ 118 119 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 120 121 #include <linux/sys.h> 122 #include <linux/types.h> 123 #include <linux/module.h> 124 #include <linux/moduleparam.h> 125 #include <linux/kernel.h> 126 #include <linux/mutex.h> 127 #include <linux/sched.h> 128 #include <linux/slab.h> 129 #include <linux/vmalloc.h> 130 #include <linux/unistd.h> 131 #include <linux/string.h> 132 #include <linux/ptrace.h> 133 #include <linux/errno.h> 134 #include <linux/ioport.h> 135 #include <linux/interrupt.h> 136 #include <linux/capability.h> 137 #include <linux/hrtimer.h> 138 #include <linux/freezer.h> 139 #include <linux/delay.h> 140 #include <linux/timer.h> 141 #include <linux/list.h> 142 #include <linux/init.h> 143 #include <linux/skbuff.h> 144 #include <linux/netdevice.h> 145 #include <linux/inet.h> 146 #include <linux/inetdevice.h> 147 #include <linux/rtnetlink.h> 148 #include <linux/if_arp.h> 149 #include <linux/if_vlan.h> 150 #include <linux/in.h> 151 #include <linux/ip.h> 152 #include <linux/ipv6.h> 153 #include <linux/udp.h> 154 #include <linux/proc_fs.h> 155 #include <linux/seq_file.h> 156 #include <linux/wait.h> 157 #include <linux/etherdevice.h> 158 #include <linux/kthread.h> 159 #include <net/net_namespace.h> 160 #include <net/checksum.h> 161 #include <net/ipv6.h> 162 #include <net/addrconf.h> 163 #ifdef CONFIG_XFRM 164 #include <net/xfrm.h> 165 #endif 166 #include <asm/byteorder.h> 167 #include <linux/rcupdate.h> 168 #include <linux/bitops.h> 169 #include <linux/io.h> 170 #include <linux/timex.h> 171 #include <linux/uaccess.h> 172 #include <asm/dma.h> 173 #include <asm/div64.h> /* do_div */ 174 175 #define VERSION "2.74" 176 #define IP_NAME_SZ 32 177 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */ 178 #define MPLS_STACK_BOTTOM htonl(0x00000100) 179 180 #define func_enter() pr_debug("entering %s\n", __func__); 181 182 /* Device flag bits */ 183 #define F_IPSRC_RND (1<<0) /* IP-Src Random */ 184 #define F_IPDST_RND (1<<1) /* IP-Dst Random */ 185 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */ 186 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */ 187 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */ 188 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */ 189 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */ 190 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */ 191 #define F_MPLS_RND (1<<8) /* Random MPLS labels */ 192 #define F_VID_RND (1<<9) /* Random VLAN ID */ 193 #define F_SVID_RND (1<<10) /* Random SVLAN ID */ 194 #define F_FLOW_SEQ (1<<11) /* Sequential flows */ 195 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */ 196 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */ 197 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */ 198 #define F_NODE (1<<15) /* Node memory alloc*/ 199 200 /* Thread control flag bits */ 201 #define T_STOP (1<<0) /* Stop run */ 202 #define T_RUN (1<<1) /* Start run */ 203 #define T_REMDEVALL (1<<2) /* Remove all devs */ 204 #define T_REMDEV (1<<3) /* Remove one dev */ 205 206 /* If lock -- can be removed after some work */ 207 #define if_lock(t) spin_lock(&(t->if_lock)); 208 #define if_unlock(t) spin_unlock(&(t->if_lock)); 209 210 /* Used to help with determining the pkts on receive */ 211 #define PKTGEN_MAGIC 0xbe9be955 212 #define PG_PROC_DIR "pktgen" 213 #define PGCTRL "pgctrl" 214 static struct proc_dir_entry *pg_proc_dir; 215 216 #define MAX_CFLOWS 65536 217 218 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4) 219 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4) 220 221 struct flow_state { 222 __be32 cur_daddr; 223 int count; 224 #ifdef CONFIG_XFRM 225 struct xfrm_state *x; 226 #endif 227 __u32 flags; 228 }; 229 230 /* flow flag bits */ 231 #define F_INIT (1<<0) /* flow has been initialized */ 232 233 struct pktgen_dev { 234 /* 235 * Try to keep frequent/infrequent used vars. separated. 236 */ 237 struct proc_dir_entry *entry; /* proc file */ 238 struct pktgen_thread *pg_thread;/* the owner */ 239 struct list_head list; /* chaining in the thread's run-queue */ 240 241 int running; /* if false, the test will stop */ 242 243 /* If min != max, then we will either do a linear iteration, or 244 * we will do a random selection from within the range. 245 */ 246 __u32 flags; 247 int removal_mark; /* non-zero => the device is marked for 248 * removal by worker thread */ 249 250 int min_pkt_size; /* = ETH_ZLEN; */ 251 int max_pkt_size; /* = ETH_ZLEN; */ 252 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */ 253 int nfrags; 254 u64 delay; /* nano-seconds */ 255 256 __u64 count; /* Default No packets to send */ 257 __u64 sofar; /* How many pkts we've sent so far */ 258 __u64 tx_bytes; /* How many bytes we've transmitted */ 259 __u64 errors; /* Errors when trying to transmit, */ 260 261 /* runtime counters relating to clone_skb */ 262 263 __u64 allocated_skbs; 264 __u32 clone_count; 265 int last_ok; /* Was last skb sent? 266 * Or a failed transmit of some sort? 267 * This will keep sequence numbers in order 268 */ 269 ktime_t next_tx; 270 ktime_t started_at; 271 ktime_t stopped_at; 272 u64 idle_acc; /* nano-seconds */ 273 274 __u32 seq_num; 275 276 int clone_skb; /* 277 * Use multiple SKBs during packet gen. 278 * If this number is greater than 1, then 279 * that many copies of the same packet will be 280 * sent before a new packet is allocated. 281 * If you want to send 1024 identical packets 282 * before creating a new packet, 283 * set clone_skb to 1024. 284 */ 285 286 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 287 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 288 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 289 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 290 291 struct in6_addr in6_saddr; 292 struct in6_addr in6_daddr; 293 struct in6_addr cur_in6_daddr; 294 struct in6_addr cur_in6_saddr; 295 /* For ranges */ 296 struct in6_addr min_in6_daddr; 297 struct in6_addr max_in6_daddr; 298 struct in6_addr min_in6_saddr; 299 struct in6_addr max_in6_saddr; 300 301 /* If we're doing ranges, random or incremental, then this 302 * defines the min/max for those ranges. 303 */ 304 __be32 saddr_min; /* inclusive, source IP address */ 305 __be32 saddr_max; /* exclusive, source IP address */ 306 __be32 daddr_min; /* inclusive, dest IP address */ 307 __be32 daddr_max; /* exclusive, dest IP address */ 308 309 __u16 udp_src_min; /* inclusive, source UDP port */ 310 __u16 udp_src_max; /* exclusive, source UDP port */ 311 __u16 udp_dst_min; /* inclusive, dest UDP port */ 312 __u16 udp_dst_max; /* exclusive, dest UDP port */ 313 314 /* DSCP + ECN */ 315 __u8 tos; /* six MSB of (former) IPv4 TOS 316 are for dscp codepoint */ 317 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 318 (see RFC 3260, sec. 4) */ 319 320 /* MPLS */ 321 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */ 322 __be32 labels[MAX_MPLS_LABELS]; 323 324 /* VLAN/SVLAN (802.1Q/Q-in-Q) */ 325 __u8 vlan_p; 326 __u8 vlan_cfi; 327 __u16 vlan_id; /* 0xffff means no vlan tag */ 328 329 __u8 svlan_p; 330 __u8 svlan_cfi; 331 __u16 svlan_id; /* 0xffff means no svlan tag */ 332 333 __u32 src_mac_count; /* How many MACs to iterate through */ 334 __u32 dst_mac_count; /* How many MACs to iterate through */ 335 336 unsigned char dst_mac[ETH_ALEN]; 337 unsigned char src_mac[ETH_ALEN]; 338 339 __u32 cur_dst_mac_offset; 340 __u32 cur_src_mac_offset; 341 __be32 cur_saddr; 342 __be32 cur_daddr; 343 __u16 ip_id; 344 __u16 cur_udp_dst; 345 __u16 cur_udp_src; 346 __u16 cur_queue_map; 347 __u32 cur_pkt_size; 348 __u32 last_pkt_size; 349 350 __u8 hh[14]; 351 /* = { 352 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, 353 354 We fill in SRC address later 355 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 356 0x08, 0x00 357 }; 358 */ 359 __u16 pad; /* pad out the hh struct to an even 16 bytes */ 360 361 struct sk_buff *skb; /* skb we are to transmit next, used for when we 362 * are transmitting the same one multiple times 363 */ 364 struct net_device *odev; /* The out-going device. 365 * Note that the device should have it's 366 * pg_info pointer pointing back to this 367 * device. 368 * Set when the user specifies the out-going 369 * device name (not when the inject is 370 * started as it used to do.) 371 */ 372 char odevname[32]; 373 struct flow_state *flows; 374 unsigned cflows; /* Concurrent flows (config) */ 375 unsigned lflow; /* Flow length (config) */ 376 unsigned nflows; /* accumulated flows (stats) */ 377 unsigned curfl; /* current sequenced flow (state)*/ 378 379 u16 queue_map_min; 380 u16 queue_map_max; 381 int node; /* Memory node */ 382 383 #ifdef CONFIG_XFRM 384 __u8 ipsmode; /* IPSEC mode (config) */ 385 __u8 ipsproto; /* IPSEC type (config) */ 386 #endif 387 char result[512]; 388 }; 389 390 struct pktgen_hdr { 391 __be32 pgh_magic; 392 __be32 seq_num; 393 __be32 tv_sec; 394 __be32 tv_usec; 395 }; 396 397 struct pktgen_thread { 398 spinlock_t if_lock; /* for list of devices */ 399 struct list_head if_list; /* All device here */ 400 struct list_head th_list; 401 struct task_struct *tsk; 402 char result[512]; 403 404 /* Field for thread to receive "posted" events terminate, 405 stop ifs etc. */ 406 407 u32 control; 408 int cpu; 409 410 wait_queue_head_t queue; 411 struct completion start_done; 412 }; 413 414 #define REMOVE 1 415 #define FIND 0 416 417 static inline ktime_t ktime_now(void) 418 { 419 struct timespec ts; 420 ktime_get_ts(&ts); 421 422 return timespec_to_ktime(ts); 423 } 424 425 /* This works even if 32 bit because of careful byte order choice */ 426 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2) 427 { 428 return cmp1.tv64 < cmp2.tv64; 429 } 430 431 static const char version[] = 432 "Packet Generator for packet performance testing. " 433 "Version: " VERSION "\n"; 434 435 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i); 436 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname); 437 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 438 const char *ifname, bool exact); 439 static int pktgen_device_event(struct notifier_block *, unsigned long, void *); 440 static void pktgen_run_all_threads(void); 441 static void pktgen_reset_all_threads(void); 442 static void pktgen_stop_all_threads_ifs(void); 443 444 static void pktgen_stop(struct pktgen_thread *t); 445 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); 446 447 static unsigned int scan_ip6(const char *s, char ip[16]); 448 static unsigned int fmt_ip6(char *s, const char ip[16]); 449 450 /* Module parameters, defaults. */ 451 static int pg_count_d __read_mostly = 1000; 452 static int pg_delay_d __read_mostly; 453 static int pg_clone_skb_d __read_mostly; 454 static int debug __read_mostly; 455 456 static DEFINE_MUTEX(pktgen_thread_lock); 457 static LIST_HEAD(pktgen_threads); 458 459 static struct notifier_block pktgen_notifier_block = { 460 .notifier_call = pktgen_device_event, 461 }; 462 463 /* 464 * /proc handling functions 465 * 466 */ 467 468 static int pgctrl_show(struct seq_file *seq, void *v) 469 { 470 seq_puts(seq, version); 471 return 0; 472 } 473 474 static ssize_t pgctrl_write(struct file *file, const char __user *buf, 475 size_t count, loff_t *ppos) 476 { 477 int err = 0; 478 char data[128]; 479 480 if (!capable(CAP_NET_ADMIN)) { 481 err = -EPERM; 482 goto out; 483 } 484 485 if (count > sizeof(data)) 486 count = sizeof(data); 487 488 if (copy_from_user(data, buf, count)) { 489 err = -EFAULT; 490 goto out; 491 } 492 data[count - 1] = 0; /* Make string */ 493 494 if (!strcmp(data, "stop")) 495 pktgen_stop_all_threads_ifs(); 496 497 else if (!strcmp(data, "start")) 498 pktgen_run_all_threads(); 499 500 else if (!strcmp(data, "reset")) 501 pktgen_reset_all_threads(); 502 503 else 504 pr_warning("Unknown command: %s\n", data); 505 506 err = count; 507 508 out: 509 return err; 510 } 511 512 static int pgctrl_open(struct inode *inode, struct file *file) 513 { 514 return single_open(file, pgctrl_show, PDE(inode)->data); 515 } 516 517 static const struct file_operations pktgen_fops = { 518 .owner = THIS_MODULE, 519 .open = pgctrl_open, 520 .read = seq_read, 521 .llseek = seq_lseek, 522 .write = pgctrl_write, 523 .release = single_release, 524 }; 525 526 static int pktgen_if_show(struct seq_file *seq, void *v) 527 { 528 const struct pktgen_dev *pkt_dev = seq->private; 529 ktime_t stopped; 530 u64 idle; 531 532 seq_printf(seq, 533 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", 534 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, 535 pkt_dev->max_pkt_size); 536 537 seq_printf(seq, 538 " frags: %d delay: %llu clone_skb: %d ifname: %s\n", 539 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay, 540 pkt_dev->clone_skb, pkt_dev->odevname); 541 542 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, 543 pkt_dev->lflow); 544 545 seq_printf(seq, 546 " queue_map_min: %u queue_map_max: %u\n", 547 pkt_dev->queue_map_min, 548 pkt_dev->queue_map_max); 549 550 if (pkt_dev->flags & F_IPV6) { 551 char b1[128], b2[128], b3[128]; 552 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr); 553 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr); 554 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr); 555 seq_printf(seq, 556 " saddr: %s min_saddr: %s max_saddr: %s\n", b1, 557 b2, b3); 558 559 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr); 560 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr); 561 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr); 562 seq_printf(seq, 563 " daddr: %s min_daddr: %s max_daddr: %s\n", b1, 564 b2, b3); 565 566 } else { 567 seq_printf(seq, 568 " dst_min: %s dst_max: %s\n", 569 pkt_dev->dst_min, pkt_dev->dst_max); 570 seq_printf(seq, 571 " src_min: %s src_max: %s\n", 572 pkt_dev->src_min, pkt_dev->src_max); 573 } 574 575 seq_puts(seq, " src_mac: "); 576 577 seq_printf(seq, "%pM ", 578 is_zero_ether_addr(pkt_dev->src_mac) ? 579 pkt_dev->odev->dev_addr : pkt_dev->src_mac); 580 581 seq_printf(seq, "dst_mac: "); 582 seq_printf(seq, "%pM\n", pkt_dev->dst_mac); 583 584 seq_printf(seq, 585 " udp_src_min: %d udp_src_max: %d" 586 " udp_dst_min: %d udp_dst_max: %d\n", 587 pkt_dev->udp_src_min, pkt_dev->udp_src_max, 588 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); 589 590 seq_printf(seq, 591 " src_mac_count: %d dst_mac_count: %d\n", 592 pkt_dev->src_mac_count, pkt_dev->dst_mac_count); 593 594 if (pkt_dev->nr_labels) { 595 unsigned i; 596 seq_printf(seq, " mpls: "); 597 for (i = 0; i < pkt_dev->nr_labels; i++) 598 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), 599 i == pkt_dev->nr_labels-1 ? "\n" : ", "); 600 } 601 602 if (pkt_dev->vlan_id != 0xffff) 603 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", 604 pkt_dev->vlan_id, pkt_dev->vlan_p, 605 pkt_dev->vlan_cfi); 606 607 if (pkt_dev->svlan_id != 0xffff) 608 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", 609 pkt_dev->svlan_id, pkt_dev->svlan_p, 610 pkt_dev->svlan_cfi); 611 612 if (pkt_dev->tos) 613 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); 614 615 if (pkt_dev->traffic_class) 616 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); 617 618 if (pkt_dev->node >= 0) 619 seq_printf(seq, " node: %d\n", pkt_dev->node); 620 621 seq_printf(seq, " Flags: "); 622 623 if (pkt_dev->flags & F_IPV6) 624 seq_printf(seq, "IPV6 "); 625 626 if (pkt_dev->flags & F_IPSRC_RND) 627 seq_printf(seq, "IPSRC_RND "); 628 629 if (pkt_dev->flags & F_IPDST_RND) 630 seq_printf(seq, "IPDST_RND "); 631 632 if (pkt_dev->flags & F_TXSIZE_RND) 633 seq_printf(seq, "TXSIZE_RND "); 634 635 if (pkt_dev->flags & F_UDPSRC_RND) 636 seq_printf(seq, "UDPSRC_RND "); 637 638 if (pkt_dev->flags & F_UDPDST_RND) 639 seq_printf(seq, "UDPDST_RND "); 640 641 if (pkt_dev->flags & F_MPLS_RND) 642 seq_printf(seq, "MPLS_RND "); 643 644 if (pkt_dev->flags & F_QUEUE_MAP_RND) 645 seq_printf(seq, "QUEUE_MAP_RND "); 646 647 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 648 seq_printf(seq, "QUEUE_MAP_CPU "); 649 650 if (pkt_dev->cflows) { 651 if (pkt_dev->flags & F_FLOW_SEQ) 652 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/ 653 else 654 seq_printf(seq, "FLOW_RND "); 655 } 656 657 #ifdef CONFIG_XFRM 658 if (pkt_dev->flags & F_IPSEC_ON) 659 seq_printf(seq, "IPSEC "); 660 #endif 661 662 if (pkt_dev->flags & F_MACSRC_RND) 663 seq_printf(seq, "MACSRC_RND "); 664 665 if (pkt_dev->flags & F_MACDST_RND) 666 seq_printf(seq, "MACDST_RND "); 667 668 if (pkt_dev->flags & F_VID_RND) 669 seq_printf(seq, "VID_RND "); 670 671 if (pkt_dev->flags & F_SVID_RND) 672 seq_printf(seq, "SVID_RND "); 673 674 if (pkt_dev->flags & F_NODE) 675 seq_printf(seq, "NODE_ALLOC "); 676 677 seq_puts(seq, "\n"); 678 679 /* not really stopped, more like last-running-at */ 680 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at; 681 idle = pkt_dev->idle_acc; 682 do_div(idle, NSEC_PER_USEC); 683 684 seq_printf(seq, 685 "Current:\n pkts-sofar: %llu errors: %llu\n", 686 (unsigned long long)pkt_dev->sofar, 687 (unsigned long long)pkt_dev->errors); 688 689 seq_printf(seq, 690 " started: %lluus stopped: %lluus idle: %lluus\n", 691 (unsigned long long) ktime_to_us(pkt_dev->started_at), 692 (unsigned long long) ktime_to_us(stopped), 693 (unsigned long long) idle); 694 695 seq_printf(seq, 696 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 697 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, 698 pkt_dev->cur_src_mac_offset); 699 700 if (pkt_dev->flags & F_IPV6) { 701 char b1[128], b2[128]; 702 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr); 703 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr); 704 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1); 705 } else 706 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n", 707 pkt_dev->cur_saddr, pkt_dev->cur_daddr); 708 709 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", 710 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 711 712 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); 713 714 seq_printf(seq, " flows: %u\n", pkt_dev->nflows); 715 716 if (pkt_dev->result[0]) 717 seq_printf(seq, "Result: %s\n", pkt_dev->result); 718 else 719 seq_printf(seq, "Result: Idle\n"); 720 721 return 0; 722 } 723 724 725 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, 726 __u32 *num) 727 { 728 int i = 0; 729 *num = 0; 730 731 for (; i < maxlen; i++) { 732 char c; 733 *num <<= 4; 734 if (get_user(c, &user_buffer[i])) 735 return -EFAULT; 736 if ((c >= '0') && (c <= '9')) 737 *num |= c - '0'; 738 else if ((c >= 'a') && (c <= 'f')) 739 *num |= c - 'a' + 10; 740 else if ((c >= 'A') && (c <= 'F')) 741 *num |= c - 'A' + 10; 742 else 743 break; 744 } 745 return i; 746 } 747 748 static int count_trail_chars(const char __user * user_buffer, 749 unsigned int maxlen) 750 { 751 int i; 752 753 for (i = 0; i < maxlen; i++) { 754 char c; 755 if (get_user(c, &user_buffer[i])) 756 return -EFAULT; 757 switch (c) { 758 case '\"': 759 case '\n': 760 case '\r': 761 case '\t': 762 case ' ': 763 case '=': 764 break; 765 default: 766 goto done; 767 } 768 } 769 done: 770 return i; 771 } 772 773 static unsigned long num_arg(const char __user * user_buffer, 774 unsigned long maxlen, unsigned long *num) 775 { 776 int i = 0; 777 *num = 0; 778 779 for (; i < maxlen; i++) { 780 char c; 781 if (get_user(c, &user_buffer[i])) 782 return -EFAULT; 783 if ((c >= '0') && (c <= '9')) { 784 *num *= 10; 785 *num += c - '0'; 786 } else 787 break; 788 } 789 return i; 790 } 791 792 static int strn_len(const char __user * user_buffer, unsigned int maxlen) 793 { 794 int i = 0; 795 796 for (; i < maxlen; i++) { 797 char c; 798 if (get_user(c, &user_buffer[i])) 799 return -EFAULT; 800 switch (c) { 801 case '\"': 802 case '\n': 803 case '\r': 804 case '\t': 805 case ' ': 806 goto done_str; 807 break; 808 default: 809 break; 810 } 811 } 812 done_str: 813 return i; 814 } 815 816 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) 817 { 818 unsigned n = 0; 819 char c; 820 ssize_t i = 0; 821 int len; 822 823 pkt_dev->nr_labels = 0; 824 do { 825 __u32 tmp; 826 len = hex32_arg(&buffer[i], 8, &tmp); 827 if (len <= 0) 828 return len; 829 pkt_dev->labels[n] = htonl(tmp); 830 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 831 pkt_dev->flags |= F_MPLS_RND; 832 i += len; 833 if (get_user(c, &buffer[i])) 834 return -EFAULT; 835 i++; 836 n++; 837 if (n >= MAX_MPLS_LABELS) 838 return -E2BIG; 839 } while (c == ','); 840 841 pkt_dev->nr_labels = n; 842 return i; 843 } 844 845 static ssize_t pktgen_if_write(struct file *file, 846 const char __user * user_buffer, size_t count, 847 loff_t * offset) 848 { 849 struct seq_file *seq = file->private_data; 850 struct pktgen_dev *pkt_dev = seq->private; 851 int i = 0, max, len; 852 char name[16], valstr[32]; 853 unsigned long value = 0; 854 char *pg_result = NULL; 855 int tmp = 0; 856 char buf[128]; 857 858 pg_result = &(pkt_dev->result[0]); 859 860 if (count < 1) { 861 pr_warning("wrong command format\n"); 862 return -EINVAL; 863 } 864 865 max = count - i; 866 tmp = count_trail_chars(&user_buffer[i], max); 867 if (tmp < 0) { 868 pr_warning("illegal format\n"); 869 return tmp; 870 } 871 i += tmp; 872 873 /* Read variable name */ 874 875 len = strn_len(&user_buffer[i], sizeof(name) - 1); 876 if (len < 0) 877 return len; 878 879 memset(name, 0, sizeof(name)); 880 if (copy_from_user(name, &user_buffer[i], len)) 881 return -EFAULT; 882 i += len; 883 884 max = count - i; 885 len = count_trail_chars(&user_buffer[i], max); 886 if (len < 0) 887 return len; 888 889 i += len; 890 891 if (debug) { 892 char tb[count + 1]; 893 if (copy_from_user(tb, user_buffer, count)) 894 return -EFAULT; 895 tb[count] = 0; 896 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name, 897 (unsigned long)count, tb); 898 } 899 900 if (!strcmp(name, "min_pkt_size")) { 901 len = num_arg(&user_buffer[i], 10, &value); 902 if (len < 0) 903 return len; 904 905 i += len; 906 if (value < 14 + 20 + 8) 907 value = 14 + 20 + 8; 908 if (value != pkt_dev->min_pkt_size) { 909 pkt_dev->min_pkt_size = value; 910 pkt_dev->cur_pkt_size = value; 911 } 912 sprintf(pg_result, "OK: min_pkt_size=%u", 913 pkt_dev->min_pkt_size); 914 return count; 915 } 916 917 if (!strcmp(name, "max_pkt_size")) { 918 len = num_arg(&user_buffer[i], 10, &value); 919 if (len < 0) 920 return len; 921 922 i += len; 923 if (value < 14 + 20 + 8) 924 value = 14 + 20 + 8; 925 if (value != pkt_dev->max_pkt_size) { 926 pkt_dev->max_pkt_size = value; 927 pkt_dev->cur_pkt_size = value; 928 } 929 sprintf(pg_result, "OK: max_pkt_size=%u", 930 pkt_dev->max_pkt_size); 931 return count; 932 } 933 934 /* Shortcut for min = max */ 935 936 if (!strcmp(name, "pkt_size")) { 937 len = num_arg(&user_buffer[i], 10, &value); 938 if (len < 0) 939 return len; 940 941 i += len; 942 if (value < 14 + 20 + 8) 943 value = 14 + 20 + 8; 944 if (value != pkt_dev->min_pkt_size) { 945 pkt_dev->min_pkt_size = value; 946 pkt_dev->max_pkt_size = value; 947 pkt_dev->cur_pkt_size = value; 948 } 949 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 950 return count; 951 } 952 953 if (!strcmp(name, "debug")) { 954 len = num_arg(&user_buffer[i], 10, &value); 955 if (len < 0) 956 return len; 957 958 i += len; 959 debug = value; 960 sprintf(pg_result, "OK: debug=%u", debug); 961 return count; 962 } 963 964 if (!strcmp(name, "frags")) { 965 len = num_arg(&user_buffer[i], 10, &value); 966 if (len < 0) 967 return len; 968 969 i += len; 970 pkt_dev->nfrags = value; 971 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 972 return count; 973 } 974 if (!strcmp(name, "delay")) { 975 len = num_arg(&user_buffer[i], 10, &value); 976 if (len < 0) 977 return len; 978 979 i += len; 980 if (value == 0x7FFFFFFF) 981 pkt_dev->delay = ULLONG_MAX; 982 else 983 pkt_dev->delay = (u64)value; 984 985 sprintf(pg_result, "OK: delay=%llu", 986 (unsigned long long) pkt_dev->delay); 987 return count; 988 } 989 if (!strcmp(name, "rate")) { 990 len = num_arg(&user_buffer[i], 10, &value); 991 if (len < 0) 992 return len; 993 994 i += len; 995 if (!value) 996 return len; 997 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value; 998 if (debug) 999 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 1000 1001 sprintf(pg_result, "OK: rate=%lu", value); 1002 return count; 1003 } 1004 if (!strcmp(name, "ratep")) { 1005 len = num_arg(&user_buffer[i], 10, &value); 1006 if (len < 0) 1007 return len; 1008 1009 i += len; 1010 if (!value) 1011 return len; 1012 pkt_dev->delay = NSEC_PER_SEC/value; 1013 if (debug) 1014 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 1015 1016 sprintf(pg_result, "OK: rate=%lu", value); 1017 return count; 1018 } 1019 if (!strcmp(name, "udp_src_min")) { 1020 len = num_arg(&user_buffer[i], 10, &value); 1021 if (len < 0) 1022 return len; 1023 1024 i += len; 1025 if (value != pkt_dev->udp_src_min) { 1026 pkt_dev->udp_src_min = value; 1027 pkt_dev->cur_udp_src = value; 1028 } 1029 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 1030 return count; 1031 } 1032 if (!strcmp(name, "udp_dst_min")) { 1033 len = num_arg(&user_buffer[i], 10, &value); 1034 if (len < 0) 1035 return len; 1036 1037 i += len; 1038 if (value != pkt_dev->udp_dst_min) { 1039 pkt_dev->udp_dst_min = value; 1040 pkt_dev->cur_udp_dst = value; 1041 } 1042 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 1043 return count; 1044 } 1045 if (!strcmp(name, "udp_src_max")) { 1046 len = num_arg(&user_buffer[i], 10, &value); 1047 if (len < 0) 1048 return len; 1049 1050 i += len; 1051 if (value != pkt_dev->udp_src_max) { 1052 pkt_dev->udp_src_max = value; 1053 pkt_dev->cur_udp_src = value; 1054 } 1055 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 1056 return count; 1057 } 1058 if (!strcmp(name, "udp_dst_max")) { 1059 len = num_arg(&user_buffer[i], 10, &value); 1060 if (len < 0) 1061 return len; 1062 1063 i += len; 1064 if (value != pkt_dev->udp_dst_max) { 1065 pkt_dev->udp_dst_max = value; 1066 pkt_dev->cur_udp_dst = value; 1067 } 1068 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1069 return count; 1070 } 1071 if (!strcmp(name, "clone_skb")) { 1072 len = num_arg(&user_buffer[i], 10, &value); 1073 if (len < 0) 1074 return len; 1075 1076 i += len; 1077 pkt_dev->clone_skb = value; 1078 1079 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1080 return count; 1081 } 1082 if (!strcmp(name, "count")) { 1083 len = num_arg(&user_buffer[i], 10, &value); 1084 if (len < 0) 1085 return len; 1086 1087 i += len; 1088 pkt_dev->count = value; 1089 sprintf(pg_result, "OK: count=%llu", 1090 (unsigned long long)pkt_dev->count); 1091 return count; 1092 } 1093 if (!strcmp(name, "src_mac_count")) { 1094 len = num_arg(&user_buffer[i], 10, &value); 1095 if (len < 0) 1096 return len; 1097 1098 i += len; 1099 if (pkt_dev->src_mac_count != value) { 1100 pkt_dev->src_mac_count = value; 1101 pkt_dev->cur_src_mac_offset = 0; 1102 } 1103 sprintf(pg_result, "OK: src_mac_count=%d", 1104 pkt_dev->src_mac_count); 1105 return count; 1106 } 1107 if (!strcmp(name, "dst_mac_count")) { 1108 len = num_arg(&user_buffer[i], 10, &value); 1109 if (len < 0) 1110 return len; 1111 1112 i += len; 1113 if (pkt_dev->dst_mac_count != value) { 1114 pkt_dev->dst_mac_count = value; 1115 pkt_dev->cur_dst_mac_offset = 0; 1116 } 1117 sprintf(pg_result, "OK: dst_mac_count=%d", 1118 pkt_dev->dst_mac_count); 1119 return count; 1120 } 1121 if (!strcmp(name, "node")) { 1122 len = num_arg(&user_buffer[i], 10, &value); 1123 if (len < 0) 1124 return len; 1125 1126 i += len; 1127 1128 if (node_possible(value)) { 1129 pkt_dev->node = value; 1130 sprintf(pg_result, "OK: node=%d", pkt_dev->node); 1131 } 1132 else 1133 sprintf(pg_result, "ERROR: node not possible"); 1134 return count; 1135 } 1136 if (!strcmp(name, "flag")) { 1137 char f[32]; 1138 memset(f, 0, 32); 1139 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1140 if (len < 0) 1141 return len; 1142 1143 if (copy_from_user(f, &user_buffer[i], len)) 1144 return -EFAULT; 1145 i += len; 1146 if (strcmp(f, "IPSRC_RND") == 0) 1147 pkt_dev->flags |= F_IPSRC_RND; 1148 1149 else if (strcmp(f, "!IPSRC_RND") == 0) 1150 pkt_dev->flags &= ~F_IPSRC_RND; 1151 1152 else if (strcmp(f, "TXSIZE_RND") == 0) 1153 pkt_dev->flags |= F_TXSIZE_RND; 1154 1155 else if (strcmp(f, "!TXSIZE_RND") == 0) 1156 pkt_dev->flags &= ~F_TXSIZE_RND; 1157 1158 else if (strcmp(f, "IPDST_RND") == 0) 1159 pkt_dev->flags |= F_IPDST_RND; 1160 1161 else if (strcmp(f, "!IPDST_RND") == 0) 1162 pkt_dev->flags &= ~F_IPDST_RND; 1163 1164 else if (strcmp(f, "UDPSRC_RND") == 0) 1165 pkt_dev->flags |= F_UDPSRC_RND; 1166 1167 else if (strcmp(f, "!UDPSRC_RND") == 0) 1168 pkt_dev->flags &= ~F_UDPSRC_RND; 1169 1170 else if (strcmp(f, "UDPDST_RND") == 0) 1171 pkt_dev->flags |= F_UDPDST_RND; 1172 1173 else if (strcmp(f, "!UDPDST_RND") == 0) 1174 pkt_dev->flags &= ~F_UDPDST_RND; 1175 1176 else if (strcmp(f, "MACSRC_RND") == 0) 1177 pkt_dev->flags |= F_MACSRC_RND; 1178 1179 else if (strcmp(f, "!MACSRC_RND") == 0) 1180 pkt_dev->flags &= ~F_MACSRC_RND; 1181 1182 else if (strcmp(f, "MACDST_RND") == 0) 1183 pkt_dev->flags |= F_MACDST_RND; 1184 1185 else if (strcmp(f, "!MACDST_RND") == 0) 1186 pkt_dev->flags &= ~F_MACDST_RND; 1187 1188 else if (strcmp(f, "MPLS_RND") == 0) 1189 pkt_dev->flags |= F_MPLS_RND; 1190 1191 else if (strcmp(f, "!MPLS_RND") == 0) 1192 pkt_dev->flags &= ~F_MPLS_RND; 1193 1194 else if (strcmp(f, "VID_RND") == 0) 1195 pkt_dev->flags |= F_VID_RND; 1196 1197 else if (strcmp(f, "!VID_RND") == 0) 1198 pkt_dev->flags &= ~F_VID_RND; 1199 1200 else if (strcmp(f, "SVID_RND") == 0) 1201 pkt_dev->flags |= F_SVID_RND; 1202 1203 else if (strcmp(f, "!SVID_RND") == 0) 1204 pkt_dev->flags &= ~F_SVID_RND; 1205 1206 else if (strcmp(f, "FLOW_SEQ") == 0) 1207 pkt_dev->flags |= F_FLOW_SEQ; 1208 1209 else if (strcmp(f, "QUEUE_MAP_RND") == 0) 1210 pkt_dev->flags |= F_QUEUE_MAP_RND; 1211 1212 else if (strcmp(f, "!QUEUE_MAP_RND") == 0) 1213 pkt_dev->flags &= ~F_QUEUE_MAP_RND; 1214 1215 else if (strcmp(f, "QUEUE_MAP_CPU") == 0) 1216 pkt_dev->flags |= F_QUEUE_MAP_CPU; 1217 1218 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0) 1219 pkt_dev->flags &= ~F_QUEUE_MAP_CPU; 1220 #ifdef CONFIG_XFRM 1221 else if (strcmp(f, "IPSEC") == 0) 1222 pkt_dev->flags |= F_IPSEC_ON; 1223 #endif 1224 1225 else if (strcmp(f, "!IPV6") == 0) 1226 pkt_dev->flags &= ~F_IPV6; 1227 1228 else if (strcmp(f, "NODE_ALLOC") == 0) 1229 pkt_dev->flags |= F_NODE; 1230 1231 else if (strcmp(f, "!NODE_ALLOC") == 0) 1232 pkt_dev->flags &= ~F_NODE; 1233 1234 else { 1235 sprintf(pg_result, 1236 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1237 f, 1238 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1239 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n"); 1240 return count; 1241 } 1242 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1243 return count; 1244 } 1245 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1246 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1247 if (len < 0) 1248 return len; 1249 1250 if (copy_from_user(buf, &user_buffer[i], len)) 1251 return -EFAULT; 1252 buf[len] = 0; 1253 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1254 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1255 strncpy(pkt_dev->dst_min, buf, len); 1256 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1257 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1258 } 1259 if (debug) 1260 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n", 1261 pkt_dev->dst_min); 1262 i += len; 1263 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1264 return count; 1265 } 1266 if (!strcmp(name, "dst_max")) { 1267 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1268 if (len < 0) 1269 return len; 1270 1271 1272 if (copy_from_user(buf, &user_buffer[i], len)) 1273 return -EFAULT; 1274 1275 buf[len] = 0; 1276 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1277 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1278 strncpy(pkt_dev->dst_max, buf, len); 1279 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1280 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1281 } 1282 if (debug) 1283 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n", 1284 pkt_dev->dst_max); 1285 i += len; 1286 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1287 return count; 1288 } 1289 if (!strcmp(name, "dst6")) { 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_daddr.s6_addr); 1301 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1302 1303 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr); 1304 1305 if (debug) 1306 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf); 1307 1308 i += len; 1309 sprintf(pg_result, "OK: dst6=%s", buf); 1310 return count; 1311 } 1312 if (!strcmp(name, "dst6_min")) { 1313 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1314 if (len < 0) 1315 return len; 1316 1317 pkt_dev->flags |= F_IPV6; 1318 1319 if (copy_from_user(buf, &user_buffer[i], len)) 1320 return -EFAULT; 1321 buf[len] = 0; 1322 1323 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1324 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1325 1326 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, 1327 &pkt_dev->min_in6_daddr); 1328 if (debug) 1329 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf); 1330 1331 i += len; 1332 sprintf(pg_result, "OK: dst6_min=%s", buf); 1333 return count; 1334 } 1335 if (!strcmp(name, "dst6_max")) { 1336 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1337 if (len < 0) 1338 return len; 1339 1340 pkt_dev->flags |= F_IPV6; 1341 1342 if (copy_from_user(buf, &user_buffer[i], len)) 1343 return -EFAULT; 1344 buf[len] = 0; 1345 1346 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1347 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1348 1349 if (debug) 1350 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf); 1351 1352 i += len; 1353 sprintf(pg_result, "OK: dst6_max=%s", buf); 1354 return count; 1355 } 1356 if (!strcmp(name, "src6")) { 1357 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1358 if (len < 0) 1359 return len; 1360 1361 pkt_dev->flags |= F_IPV6; 1362 1363 if (copy_from_user(buf, &user_buffer[i], len)) 1364 return -EFAULT; 1365 buf[len] = 0; 1366 1367 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1368 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1369 1370 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr); 1371 1372 if (debug) 1373 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf); 1374 1375 i += len; 1376 sprintf(pg_result, "OK: src6=%s", buf); 1377 return count; 1378 } 1379 if (!strcmp(name, "src_min")) { 1380 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1381 if (len < 0) 1382 return len; 1383 1384 if (copy_from_user(buf, &user_buffer[i], len)) 1385 return -EFAULT; 1386 buf[len] = 0; 1387 if (strcmp(buf, pkt_dev->src_min) != 0) { 1388 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1389 strncpy(pkt_dev->src_min, buf, len); 1390 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1391 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1392 } 1393 if (debug) 1394 printk(KERN_DEBUG "pktgen: src_min set to: %s\n", 1395 pkt_dev->src_min); 1396 i += len; 1397 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1398 return count; 1399 } 1400 if (!strcmp(name, "src_max")) { 1401 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1402 if (len < 0) 1403 return len; 1404 1405 if (copy_from_user(buf, &user_buffer[i], len)) 1406 return -EFAULT; 1407 buf[len] = 0; 1408 if (strcmp(buf, pkt_dev->src_max) != 0) { 1409 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1410 strncpy(pkt_dev->src_max, buf, len); 1411 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1412 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1413 } 1414 if (debug) 1415 printk(KERN_DEBUG "pktgen: src_max set to: %s\n", 1416 pkt_dev->src_max); 1417 i += len; 1418 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1419 return count; 1420 } 1421 if (!strcmp(name, "dst_mac")) { 1422 char *v = valstr; 1423 unsigned char old_dmac[ETH_ALEN]; 1424 unsigned char *m = pkt_dev->dst_mac; 1425 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN); 1426 1427 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1428 if (len < 0) 1429 return len; 1430 1431 memset(valstr, 0, sizeof(valstr)); 1432 if (copy_from_user(valstr, &user_buffer[i], len)) 1433 return -EFAULT; 1434 i += len; 1435 1436 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) { 1437 int value; 1438 1439 value = hex_to_bin(*v); 1440 if (value >= 0) 1441 *m = *m * 16 + value; 1442 1443 if (*v == ':') { 1444 m++; 1445 *m = 0; 1446 } 1447 } 1448 1449 /* Set up Dest MAC */ 1450 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac)) 1451 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 1452 1453 sprintf(pg_result, "OK: dstmac"); 1454 return count; 1455 } 1456 if (!strcmp(name, "src_mac")) { 1457 char *v = valstr; 1458 unsigned char old_smac[ETH_ALEN]; 1459 unsigned char *m = pkt_dev->src_mac; 1460 1461 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN); 1462 1463 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1464 if (len < 0) 1465 return len; 1466 1467 memset(valstr, 0, sizeof(valstr)); 1468 if (copy_from_user(valstr, &user_buffer[i], len)) 1469 return -EFAULT; 1470 i += len; 1471 1472 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) { 1473 int value; 1474 1475 value = hex_to_bin(*v); 1476 if (value >= 0) 1477 *m = *m * 16 + value; 1478 1479 if (*v == ':') { 1480 m++; 1481 *m = 0; 1482 } 1483 } 1484 1485 /* Set up Src MAC */ 1486 if (compare_ether_addr(old_smac, pkt_dev->src_mac)) 1487 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN); 1488 1489 sprintf(pg_result, "OK: srcmac"); 1490 return count; 1491 } 1492 1493 if (!strcmp(name, "clear_counters")) { 1494 pktgen_clear_counters(pkt_dev); 1495 sprintf(pg_result, "OK: Clearing counters.\n"); 1496 return count; 1497 } 1498 1499 if (!strcmp(name, "flows")) { 1500 len = num_arg(&user_buffer[i], 10, &value); 1501 if (len < 0) 1502 return len; 1503 1504 i += len; 1505 if (value > MAX_CFLOWS) 1506 value = MAX_CFLOWS; 1507 1508 pkt_dev->cflows = value; 1509 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1510 return count; 1511 } 1512 1513 if (!strcmp(name, "flowlen")) { 1514 len = num_arg(&user_buffer[i], 10, &value); 1515 if (len < 0) 1516 return len; 1517 1518 i += len; 1519 pkt_dev->lflow = value; 1520 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1521 return count; 1522 } 1523 1524 if (!strcmp(name, "queue_map_min")) { 1525 len = num_arg(&user_buffer[i], 5, &value); 1526 if (len < 0) 1527 return len; 1528 1529 i += len; 1530 pkt_dev->queue_map_min = value; 1531 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1532 return count; 1533 } 1534 1535 if (!strcmp(name, "queue_map_max")) { 1536 len = num_arg(&user_buffer[i], 5, &value); 1537 if (len < 0) 1538 return len; 1539 1540 i += len; 1541 pkt_dev->queue_map_max = value; 1542 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1543 return count; 1544 } 1545 1546 if (!strcmp(name, "mpls")) { 1547 unsigned n, cnt; 1548 1549 len = get_labels(&user_buffer[i], pkt_dev); 1550 if (len < 0) 1551 return len; 1552 i += len; 1553 cnt = sprintf(pg_result, "OK: mpls="); 1554 for (n = 0; n < pkt_dev->nr_labels; n++) 1555 cnt += sprintf(pg_result + cnt, 1556 "%08x%s", ntohl(pkt_dev->labels[n]), 1557 n == pkt_dev->nr_labels-1 ? "" : ","); 1558 1559 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1560 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1561 pkt_dev->svlan_id = 0xffff; 1562 1563 if (debug) 1564 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n"); 1565 } 1566 return count; 1567 } 1568 1569 if (!strcmp(name, "vlan_id")) { 1570 len = num_arg(&user_buffer[i], 4, &value); 1571 if (len < 0) 1572 return len; 1573 1574 i += len; 1575 if (value <= 4095) { 1576 pkt_dev->vlan_id = value; /* turn on VLAN */ 1577 1578 if (debug) 1579 printk(KERN_DEBUG "pktgen: VLAN turned on\n"); 1580 1581 if (debug && pkt_dev->nr_labels) 1582 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1583 1584 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1585 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1586 } else { 1587 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1588 pkt_dev->svlan_id = 0xffff; 1589 1590 if (debug) 1591 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1592 } 1593 return count; 1594 } 1595 1596 if (!strcmp(name, "vlan_p")) { 1597 len = num_arg(&user_buffer[i], 1, &value); 1598 if (len < 0) 1599 return len; 1600 1601 i += len; 1602 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1603 pkt_dev->vlan_p = value; 1604 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1605 } else { 1606 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1607 } 1608 return count; 1609 } 1610 1611 if (!strcmp(name, "vlan_cfi")) { 1612 len = num_arg(&user_buffer[i], 1, &value); 1613 if (len < 0) 1614 return len; 1615 1616 i += len; 1617 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1618 pkt_dev->vlan_cfi = value; 1619 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1620 } else { 1621 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1622 } 1623 return count; 1624 } 1625 1626 if (!strcmp(name, "svlan_id")) { 1627 len = num_arg(&user_buffer[i], 4, &value); 1628 if (len < 0) 1629 return len; 1630 1631 i += len; 1632 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1633 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1634 1635 if (debug) 1636 printk(KERN_DEBUG "pktgen: SVLAN turned on\n"); 1637 1638 if (debug && pkt_dev->nr_labels) 1639 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1640 1641 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1642 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1643 } else { 1644 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1645 pkt_dev->svlan_id = 0xffff; 1646 1647 if (debug) 1648 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1649 } 1650 return count; 1651 } 1652 1653 if (!strcmp(name, "svlan_p")) { 1654 len = num_arg(&user_buffer[i], 1, &value); 1655 if (len < 0) 1656 return len; 1657 1658 i += len; 1659 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1660 pkt_dev->svlan_p = value; 1661 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1662 } else { 1663 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1664 } 1665 return count; 1666 } 1667 1668 if (!strcmp(name, "svlan_cfi")) { 1669 len = num_arg(&user_buffer[i], 1, &value); 1670 if (len < 0) 1671 return len; 1672 1673 i += len; 1674 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1675 pkt_dev->svlan_cfi = value; 1676 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1677 } else { 1678 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1679 } 1680 return count; 1681 } 1682 1683 if (!strcmp(name, "tos")) { 1684 __u32 tmp_value = 0; 1685 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1686 if (len < 0) 1687 return len; 1688 1689 i += len; 1690 if (len == 2) { 1691 pkt_dev->tos = tmp_value; 1692 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1693 } else { 1694 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1695 } 1696 return count; 1697 } 1698 1699 if (!strcmp(name, "traffic_class")) { 1700 __u32 tmp_value = 0; 1701 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1702 if (len < 0) 1703 return len; 1704 1705 i += len; 1706 if (len == 2) { 1707 pkt_dev->traffic_class = tmp_value; 1708 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1709 } else { 1710 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1711 } 1712 return count; 1713 } 1714 1715 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1716 return -EINVAL; 1717 } 1718 1719 static int pktgen_if_open(struct inode *inode, struct file *file) 1720 { 1721 return single_open(file, pktgen_if_show, PDE(inode)->data); 1722 } 1723 1724 static const struct file_operations pktgen_if_fops = { 1725 .owner = THIS_MODULE, 1726 .open = pktgen_if_open, 1727 .read = seq_read, 1728 .llseek = seq_lseek, 1729 .write = pktgen_if_write, 1730 .release = single_release, 1731 }; 1732 1733 static int pktgen_thread_show(struct seq_file *seq, void *v) 1734 { 1735 struct pktgen_thread *t = seq->private; 1736 const struct pktgen_dev *pkt_dev; 1737 1738 BUG_ON(!t); 1739 1740 seq_printf(seq, "Running: "); 1741 1742 if_lock(t); 1743 list_for_each_entry(pkt_dev, &t->if_list, list) 1744 if (pkt_dev->running) 1745 seq_printf(seq, "%s ", pkt_dev->odevname); 1746 1747 seq_printf(seq, "\nStopped: "); 1748 1749 list_for_each_entry(pkt_dev, &t->if_list, list) 1750 if (!pkt_dev->running) 1751 seq_printf(seq, "%s ", pkt_dev->odevname); 1752 1753 if (t->result[0]) 1754 seq_printf(seq, "\nResult: %s\n", t->result); 1755 else 1756 seq_printf(seq, "\nResult: NA\n"); 1757 1758 if_unlock(t); 1759 1760 return 0; 1761 } 1762 1763 static ssize_t pktgen_thread_write(struct file *file, 1764 const char __user * user_buffer, 1765 size_t count, loff_t * offset) 1766 { 1767 struct seq_file *seq = file->private_data; 1768 struct pktgen_thread *t = seq->private; 1769 int i = 0, max, len, ret; 1770 char name[40]; 1771 char *pg_result; 1772 1773 if (count < 1) { 1774 // sprintf(pg_result, "Wrong command format"); 1775 return -EINVAL; 1776 } 1777 1778 max = count - i; 1779 len = count_trail_chars(&user_buffer[i], max); 1780 if (len < 0) 1781 return len; 1782 1783 i += len; 1784 1785 /* Read variable name */ 1786 1787 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1788 if (len < 0) 1789 return len; 1790 1791 memset(name, 0, sizeof(name)); 1792 if (copy_from_user(name, &user_buffer[i], len)) 1793 return -EFAULT; 1794 i += len; 1795 1796 max = count - i; 1797 len = count_trail_chars(&user_buffer[i], max); 1798 if (len < 0) 1799 return len; 1800 1801 i += len; 1802 1803 if (debug) 1804 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n", 1805 name, (unsigned long)count); 1806 1807 if (!t) { 1808 pr_err("ERROR: No thread\n"); 1809 ret = -EINVAL; 1810 goto out; 1811 } 1812 1813 pg_result = &(t->result[0]); 1814 1815 if (!strcmp(name, "add_device")) { 1816 char f[32]; 1817 memset(f, 0, 32); 1818 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1819 if (len < 0) { 1820 ret = len; 1821 goto out; 1822 } 1823 if (copy_from_user(f, &user_buffer[i], len)) 1824 return -EFAULT; 1825 i += len; 1826 mutex_lock(&pktgen_thread_lock); 1827 pktgen_add_device(t, f); 1828 mutex_unlock(&pktgen_thread_lock); 1829 ret = count; 1830 sprintf(pg_result, "OK: add_device=%s", f); 1831 goto out; 1832 } 1833 1834 if (!strcmp(name, "rem_device_all")) { 1835 mutex_lock(&pktgen_thread_lock); 1836 t->control |= T_REMDEVALL; 1837 mutex_unlock(&pktgen_thread_lock); 1838 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1839 ret = count; 1840 sprintf(pg_result, "OK: rem_device_all"); 1841 goto out; 1842 } 1843 1844 if (!strcmp(name, "max_before_softirq")) { 1845 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1846 ret = count; 1847 goto out; 1848 } 1849 1850 ret = -EINVAL; 1851 out: 1852 return ret; 1853 } 1854 1855 static int pktgen_thread_open(struct inode *inode, struct file *file) 1856 { 1857 return single_open(file, pktgen_thread_show, PDE(inode)->data); 1858 } 1859 1860 static const struct file_operations pktgen_thread_fops = { 1861 .owner = THIS_MODULE, 1862 .open = pktgen_thread_open, 1863 .read = seq_read, 1864 .llseek = seq_lseek, 1865 .write = pktgen_thread_write, 1866 .release = single_release, 1867 }; 1868 1869 /* Think find or remove for NN */ 1870 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove) 1871 { 1872 struct pktgen_thread *t; 1873 struct pktgen_dev *pkt_dev = NULL; 1874 bool exact = (remove == FIND); 1875 1876 list_for_each_entry(t, &pktgen_threads, th_list) { 1877 pkt_dev = pktgen_find_dev(t, ifname, exact); 1878 if (pkt_dev) { 1879 if (remove) { 1880 if_lock(t); 1881 pkt_dev->removal_mark = 1; 1882 t->control |= T_REMDEV; 1883 if_unlock(t); 1884 } 1885 break; 1886 } 1887 } 1888 return pkt_dev; 1889 } 1890 1891 /* 1892 * mark a device for removal 1893 */ 1894 static void pktgen_mark_device(const char *ifname) 1895 { 1896 struct pktgen_dev *pkt_dev = NULL; 1897 const int max_tries = 10, msec_per_try = 125; 1898 int i = 0; 1899 1900 mutex_lock(&pktgen_thread_lock); 1901 pr_debug("%s: marking %s for removal\n", __func__, ifname); 1902 1903 while (1) { 1904 1905 pkt_dev = __pktgen_NN_threads(ifname, REMOVE); 1906 if (pkt_dev == NULL) 1907 break; /* success */ 1908 1909 mutex_unlock(&pktgen_thread_lock); 1910 pr_debug("%s: waiting for %s to disappear....\n", 1911 __func__, ifname); 1912 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1913 mutex_lock(&pktgen_thread_lock); 1914 1915 if (++i >= max_tries) { 1916 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n", 1917 __func__, msec_per_try * i, ifname); 1918 break; 1919 } 1920 1921 } 1922 1923 mutex_unlock(&pktgen_thread_lock); 1924 } 1925 1926 static void pktgen_change_name(struct net_device *dev) 1927 { 1928 struct pktgen_thread *t; 1929 1930 list_for_each_entry(t, &pktgen_threads, th_list) { 1931 struct pktgen_dev *pkt_dev; 1932 1933 list_for_each_entry(pkt_dev, &t->if_list, list) { 1934 if (pkt_dev->odev != dev) 1935 continue; 1936 1937 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 1938 1939 pkt_dev->entry = proc_create_data(dev->name, 0600, 1940 pg_proc_dir, 1941 &pktgen_if_fops, 1942 pkt_dev); 1943 if (!pkt_dev->entry) 1944 pr_err("can't move proc entry for '%s'\n", 1945 dev->name); 1946 break; 1947 } 1948 } 1949 } 1950 1951 static int pktgen_device_event(struct notifier_block *unused, 1952 unsigned long event, void *ptr) 1953 { 1954 struct net_device *dev = ptr; 1955 1956 if (!net_eq(dev_net(dev), &init_net)) 1957 return NOTIFY_DONE; 1958 1959 /* It is OK that we do not hold the group lock right now, 1960 * as we run under the RTNL lock. 1961 */ 1962 1963 switch (event) { 1964 case NETDEV_CHANGENAME: 1965 pktgen_change_name(dev); 1966 break; 1967 1968 case NETDEV_UNREGISTER: 1969 pktgen_mark_device(dev->name); 1970 break; 1971 } 1972 1973 return NOTIFY_DONE; 1974 } 1975 1976 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev, 1977 const char *ifname) 1978 { 1979 char b[IFNAMSIZ+5]; 1980 int i = 0; 1981 1982 for (i = 0; ifname[i] != '@'; i++) { 1983 if (i == IFNAMSIZ) 1984 break; 1985 1986 b[i] = ifname[i]; 1987 } 1988 b[i] = 0; 1989 1990 return dev_get_by_name(&init_net, b); 1991 } 1992 1993 1994 /* Associate pktgen_dev with a device. */ 1995 1996 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname) 1997 { 1998 struct net_device *odev; 1999 int err; 2000 2001 /* Clean old setups */ 2002 if (pkt_dev->odev) { 2003 dev_put(pkt_dev->odev); 2004 pkt_dev->odev = NULL; 2005 } 2006 2007 odev = pktgen_dev_get_by_name(pkt_dev, ifname); 2008 if (!odev) { 2009 pr_err("no such netdevice: \"%s\"\n", ifname); 2010 return -ENODEV; 2011 } 2012 2013 if (odev->type != ARPHRD_ETHER) { 2014 pr_err("not an ethernet device: \"%s\"\n", ifname); 2015 err = -EINVAL; 2016 } else if (!netif_running(odev)) { 2017 pr_err("device is down: \"%s\"\n", ifname); 2018 err = -ENETDOWN; 2019 } else { 2020 pkt_dev->odev = odev; 2021 return 0; 2022 } 2023 2024 dev_put(odev); 2025 return err; 2026 } 2027 2028 /* Read pkt_dev from the interface and set up internal pktgen_dev 2029 * structure to have the right information to create/send packets 2030 */ 2031 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 2032 { 2033 int ntxq; 2034 2035 if (!pkt_dev->odev) { 2036 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n"); 2037 sprintf(pkt_dev->result, 2038 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 2039 return; 2040 } 2041 2042 /* make sure that we don't pick a non-existing transmit queue */ 2043 ntxq = pkt_dev->odev->real_num_tx_queues; 2044 2045 if (ntxq <= pkt_dev->queue_map_min) { 2046 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2047 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, 2048 pkt_dev->odevname); 2049 pkt_dev->queue_map_min = ntxq - 1; 2050 } 2051 if (pkt_dev->queue_map_max >= ntxq) { 2052 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2053 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, 2054 pkt_dev->odevname); 2055 pkt_dev->queue_map_max = ntxq - 1; 2056 } 2057 2058 /* Default to the interface's mac if not explicitly set. */ 2059 2060 if (is_zero_ether_addr(pkt_dev->src_mac)) 2061 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN); 2062 2063 /* Set up Dest MAC */ 2064 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 2065 2066 /* Set up pkt size */ 2067 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2068 2069 if (pkt_dev->flags & F_IPV6) { 2070 /* 2071 * Skip this automatic address setting until locks or functions 2072 * gets exported 2073 */ 2074 2075 #ifdef NOTNOW 2076 int i, set = 0, err = 1; 2077 struct inet6_dev *idev; 2078 2079 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2080 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2081 set = 1; 2082 break; 2083 } 2084 2085 if (!set) { 2086 2087 /* 2088 * Use linklevel address if unconfigured. 2089 * 2090 * use ipv6_get_lladdr if/when it's get exported 2091 */ 2092 2093 rcu_read_lock(); 2094 idev = __in6_dev_get(pkt_dev->odev); 2095 if (idev) { 2096 struct inet6_ifaddr *ifp; 2097 2098 read_lock_bh(&idev->lock); 2099 for (ifp = idev->addr_list; ifp; 2100 ifp = ifp->if_next) { 2101 if (ifp->scope == IFA_LINK && 2102 !(ifp->flags & IFA_F_TENTATIVE)) { 2103 ipv6_addr_copy(&pkt_dev-> 2104 cur_in6_saddr, 2105 &ifp->addr); 2106 err = 0; 2107 break; 2108 } 2109 } 2110 read_unlock_bh(&idev->lock); 2111 } 2112 rcu_read_unlock(); 2113 if (err) 2114 pr_err("ERROR: IPv6 link address not available\n"); 2115 } 2116 #endif 2117 } else { 2118 pkt_dev->saddr_min = 0; 2119 pkt_dev->saddr_max = 0; 2120 if (strlen(pkt_dev->src_min) == 0) { 2121 2122 struct in_device *in_dev; 2123 2124 rcu_read_lock(); 2125 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2126 if (in_dev) { 2127 if (in_dev->ifa_list) { 2128 pkt_dev->saddr_min = 2129 in_dev->ifa_list->ifa_address; 2130 pkt_dev->saddr_max = pkt_dev->saddr_min; 2131 } 2132 } 2133 rcu_read_unlock(); 2134 } else { 2135 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2136 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2137 } 2138 2139 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2140 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2141 } 2142 /* Initialize current values. */ 2143 pkt_dev->cur_dst_mac_offset = 0; 2144 pkt_dev->cur_src_mac_offset = 0; 2145 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2146 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2147 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2148 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2149 pkt_dev->nflows = 0; 2150 } 2151 2152 2153 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) 2154 { 2155 ktime_t start_time, end_time; 2156 s64 remaining; 2157 struct hrtimer_sleeper t; 2158 2159 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); 2160 hrtimer_set_expires(&t.timer, spin_until); 2161 2162 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer)); 2163 if (remaining <= 0) { 2164 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2165 return; 2166 } 2167 2168 start_time = ktime_now(); 2169 if (remaining < 100000) 2170 ndelay(remaining); /* really small just spin */ 2171 else { 2172 /* see do_nanosleep */ 2173 hrtimer_init_sleeper(&t, current); 2174 do { 2175 set_current_state(TASK_INTERRUPTIBLE); 2176 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS); 2177 if (!hrtimer_active(&t.timer)) 2178 t.task = NULL; 2179 2180 if (likely(t.task)) 2181 schedule(); 2182 2183 hrtimer_cancel(&t.timer); 2184 } while (t.task && pkt_dev->running && !signal_pending(current)); 2185 __set_current_state(TASK_RUNNING); 2186 } 2187 end_time = ktime_now(); 2188 2189 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); 2190 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2191 } 2192 2193 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2194 { 2195 pkt_dev->pkt_overhead = 0; 2196 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2197 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2198 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2199 } 2200 2201 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) 2202 { 2203 return !!(pkt_dev->flows[flow].flags & F_INIT); 2204 } 2205 2206 static inline int f_pick(struct pktgen_dev *pkt_dev) 2207 { 2208 int flow = pkt_dev->curfl; 2209 2210 if (pkt_dev->flags & F_FLOW_SEQ) { 2211 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2212 /* reset time */ 2213 pkt_dev->flows[flow].count = 0; 2214 pkt_dev->flows[flow].flags = 0; 2215 pkt_dev->curfl += 1; 2216 if (pkt_dev->curfl >= pkt_dev->cflows) 2217 pkt_dev->curfl = 0; /*reset */ 2218 } 2219 } else { 2220 flow = random32() % pkt_dev->cflows; 2221 pkt_dev->curfl = flow; 2222 2223 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2224 pkt_dev->flows[flow].count = 0; 2225 pkt_dev->flows[flow].flags = 0; 2226 } 2227 } 2228 2229 return pkt_dev->curfl; 2230 } 2231 2232 2233 #ifdef CONFIG_XFRM 2234 /* If there was already an IPSEC SA, we keep it as is, else 2235 * we go look for it ... 2236 */ 2237 #define DUMMY_MARK 0 2238 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2239 { 2240 struct xfrm_state *x = pkt_dev->flows[flow].x; 2241 if (!x) { 2242 /*slow path: we dont already have xfrm_state*/ 2243 x = xfrm_stateonly_find(&init_net, DUMMY_MARK, 2244 (xfrm_address_t *)&pkt_dev->cur_daddr, 2245 (xfrm_address_t *)&pkt_dev->cur_saddr, 2246 AF_INET, 2247 pkt_dev->ipsmode, 2248 pkt_dev->ipsproto, 0); 2249 if (x) { 2250 pkt_dev->flows[flow].x = x; 2251 set_pkt_overhead(pkt_dev); 2252 pkt_dev->pkt_overhead += x->props.header_len; 2253 } 2254 2255 } 2256 } 2257 #endif 2258 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2259 { 2260 2261 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2262 pkt_dev->cur_queue_map = smp_processor_id(); 2263 2264 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { 2265 __u16 t; 2266 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2267 t = random32() % 2268 (pkt_dev->queue_map_max - 2269 pkt_dev->queue_map_min + 1) 2270 + pkt_dev->queue_map_min; 2271 } else { 2272 t = pkt_dev->cur_queue_map + 1; 2273 if (t > pkt_dev->queue_map_max) 2274 t = pkt_dev->queue_map_min; 2275 } 2276 pkt_dev->cur_queue_map = t; 2277 } 2278 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2279 } 2280 2281 /* Increment/randomize headers according to flags and current values 2282 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2283 */ 2284 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2285 { 2286 __u32 imn; 2287 __u32 imx; 2288 int flow = 0; 2289 2290 if (pkt_dev->cflows) 2291 flow = f_pick(pkt_dev); 2292 2293 /* Deal with source MAC */ 2294 if (pkt_dev->src_mac_count > 1) { 2295 __u32 mc; 2296 __u32 tmp; 2297 2298 if (pkt_dev->flags & F_MACSRC_RND) 2299 mc = random32() % pkt_dev->src_mac_count; 2300 else { 2301 mc = pkt_dev->cur_src_mac_offset++; 2302 if (pkt_dev->cur_src_mac_offset >= 2303 pkt_dev->src_mac_count) 2304 pkt_dev->cur_src_mac_offset = 0; 2305 } 2306 2307 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2308 pkt_dev->hh[11] = tmp; 2309 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2310 pkt_dev->hh[10] = tmp; 2311 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2312 pkt_dev->hh[9] = tmp; 2313 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2314 pkt_dev->hh[8] = tmp; 2315 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2316 pkt_dev->hh[7] = tmp; 2317 } 2318 2319 /* Deal with Destination MAC */ 2320 if (pkt_dev->dst_mac_count > 1) { 2321 __u32 mc; 2322 __u32 tmp; 2323 2324 if (pkt_dev->flags & F_MACDST_RND) 2325 mc = random32() % pkt_dev->dst_mac_count; 2326 2327 else { 2328 mc = pkt_dev->cur_dst_mac_offset++; 2329 if (pkt_dev->cur_dst_mac_offset >= 2330 pkt_dev->dst_mac_count) { 2331 pkt_dev->cur_dst_mac_offset = 0; 2332 } 2333 } 2334 2335 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2336 pkt_dev->hh[5] = tmp; 2337 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2338 pkt_dev->hh[4] = tmp; 2339 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2340 pkt_dev->hh[3] = tmp; 2341 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2342 pkt_dev->hh[2] = tmp; 2343 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2344 pkt_dev->hh[1] = tmp; 2345 } 2346 2347 if (pkt_dev->flags & F_MPLS_RND) { 2348 unsigned i; 2349 for (i = 0; i < pkt_dev->nr_labels; i++) 2350 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2351 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2352 ((__force __be32)random32() & 2353 htonl(0x000fffff)); 2354 } 2355 2356 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2357 pkt_dev->vlan_id = random32() & (4096-1); 2358 } 2359 2360 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2361 pkt_dev->svlan_id = random32() & (4096 - 1); 2362 } 2363 2364 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2365 if (pkt_dev->flags & F_UDPSRC_RND) 2366 pkt_dev->cur_udp_src = random32() % 2367 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2368 + pkt_dev->udp_src_min; 2369 2370 else { 2371 pkt_dev->cur_udp_src++; 2372 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2373 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2374 } 2375 } 2376 2377 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2378 if (pkt_dev->flags & F_UDPDST_RND) { 2379 pkt_dev->cur_udp_dst = random32() % 2380 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2381 + pkt_dev->udp_dst_min; 2382 } else { 2383 pkt_dev->cur_udp_dst++; 2384 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2385 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2386 } 2387 } 2388 2389 if (!(pkt_dev->flags & F_IPV6)) { 2390 2391 imn = ntohl(pkt_dev->saddr_min); 2392 imx = ntohl(pkt_dev->saddr_max); 2393 if (imn < imx) { 2394 __u32 t; 2395 if (pkt_dev->flags & F_IPSRC_RND) 2396 t = random32() % (imx - imn) + imn; 2397 else { 2398 t = ntohl(pkt_dev->cur_saddr); 2399 t++; 2400 if (t > imx) 2401 t = imn; 2402 2403 } 2404 pkt_dev->cur_saddr = htonl(t); 2405 } 2406 2407 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2408 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2409 } else { 2410 imn = ntohl(pkt_dev->daddr_min); 2411 imx = ntohl(pkt_dev->daddr_max); 2412 if (imn < imx) { 2413 __u32 t; 2414 __be32 s; 2415 if (pkt_dev->flags & F_IPDST_RND) { 2416 2417 t = random32() % (imx - imn) + imn; 2418 s = htonl(t); 2419 2420 while (ipv4_is_loopback(s) || 2421 ipv4_is_multicast(s) || 2422 ipv4_is_lbcast(s) || 2423 ipv4_is_zeronet(s) || 2424 ipv4_is_local_multicast(s)) { 2425 t = random32() % (imx - imn) + imn; 2426 s = htonl(t); 2427 } 2428 pkt_dev->cur_daddr = s; 2429 } else { 2430 t = ntohl(pkt_dev->cur_daddr); 2431 t++; 2432 if (t > imx) { 2433 t = imn; 2434 } 2435 pkt_dev->cur_daddr = htonl(t); 2436 } 2437 } 2438 if (pkt_dev->cflows) { 2439 pkt_dev->flows[flow].flags |= F_INIT; 2440 pkt_dev->flows[flow].cur_daddr = 2441 pkt_dev->cur_daddr; 2442 #ifdef CONFIG_XFRM 2443 if (pkt_dev->flags & F_IPSEC_ON) 2444 get_ipsec_sa(pkt_dev, flow); 2445 #endif 2446 pkt_dev->nflows++; 2447 } 2448 } 2449 } else { /* IPV6 * */ 2450 2451 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 && 2452 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 && 2453 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 && 2454 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ; 2455 else { 2456 int i; 2457 2458 /* Only random destinations yet */ 2459 2460 for (i = 0; i < 4; i++) { 2461 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2462 (((__force __be32)random32() | 2463 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2464 pkt_dev->max_in6_daddr.s6_addr32[i]); 2465 } 2466 } 2467 } 2468 2469 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2470 __u32 t; 2471 if (pkt_dev->flags & F_TXSIZE_RND) { 2472 t = random32() % 2473 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2474 + pkt_dev->min_pkt_size; 2475 } else { 2476 t = pkt_dev->cur_pkt_size + 1; 2477 if (t > pkt_dev->max_pkt_size) 2478 t = pkt_dev->min_pkt_size; 2479 } 2480 pkt_dev->cur_pkt_size = t; 2481 } 2482 2483 set_cur_queue_map(pkt_dev); 2484 2485 pkt_dev->flows[flow].count++; 2486 } 2487 2488 2489 #ifdef CONFIG_XFRM 2490 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2491 { 2492 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2493 int err = 0; 2494 struct iphdr *iph; 2495 2496 if (!x) 2497 return 0; 2498 /* XXX: we dont support tunnel mode for now until 2499 * we resolve the dst issue */ 2500 if (x->props.mode != XFRM_MODE_TRANSPORT) 2501 return 0; 2502 2503 spin_lock(&x->lock); 2504 iph = ip_hdr(skb); 2505 2506 err = x->outer_mode->output(x, skb); 2507 if (err) 2508 goto error; 2509 err = x->type->output(x, skb); 2510 if (err) 2511 goto error; 2512 2513 x->curlft.bytes += skb->len; 2514 x->curlft.packets++; 2515 error: 2516 spin_unlock(&x->lock); 2517 return err; 2518 } 2519 2520 static void free_SAs(struct pktgen_dev *pkt_dev) 2521 { 2522 if (pkt_dev->cflows) { 2523 /* let go of the SAs if we have them */ 2524 int i = 0; 2525 for (; i < pkt_dev->cflows; i++) { 2526 struct xfrm_state *x = pkt_dev->flows[i].x; 2527 if (x) { 2528 xfrm_state_put(x); 2529 pkt_dev->flows[i].x = NULL; 2530 } 2531 } 2532 } 2533 } 2534 2535 static int process_ipsec(struct pktgen_dev *pkt_dev, 2536 struct sk_buff *skb, __be16 protocol) 2537 { 2538 if (pkt_dev->flags & F_IPSEC_ON) { 2539 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2540 int nhead = 0; 2541 if (x) { 2542 int ret; 2543 __u8 *eth; 2544 nhead = x->props.header_len - skb_headroom(skb); 2545 if (nhead > 0) { 2546 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2547 if (ret < 0) { 2548 pr_err("Error expanding ipsec packet %d\n", 2549 ret); 2550 goto err; 2551 } 2552 } 2553 2554 /* ipsec is not expecting ll header */ 2555 skb_pull(skb, ETH_HLEN); 2556 ret = pktgen_output_ipsec(skb, pkt_dev); 2557 if (ret) { 2558 pr_err("Error creating ipsec packet %d\n", ret); 2559 goto err; 2560 } 2561 /* restore ll */ 2562 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2563 memcpy(eth, pkt_dev->hh, 12); 2564 *(u16 *) ð[12] = protocol; 2565 } 2566 } 2567 return 1; 2568 err: 2569 kfree_skb(skb); 2570 return 0; 2571 } 2572 #endif 2573 2574 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2575 { 2576 unsigned i; 2577 for (i = 0; i < pkt_dev->nr_labels; i++) 2578 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2579 2580 mpls--; 2581 *mpls |= MPLS_STACK_BOTTOM; 2582 } 2583 2584 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2585 unsigned int prio) 2586 { 2587 return htons(id | (cfi << 12) | (prio << 13)); 2588 } 2589 2590 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2591 struct pktgen_dev *pkt_dev) 2592 { 2593 struct sk_buff *skb = NULL; 2594 __u8 *eth; 2595 struct udphdr *udph; 2596 int datalen, iplen; 2597 struct iphdr *iph; 2598 struct pktgen_hdr *pgh = NULL; 2599 __be16 protocol = htons(ETH_P_IP); 2600 __be32 *mpls; 2601 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2602 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2603 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2604 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2605 u16 queue_map; 2606 2607 if (pkt_dev->nr_labels) 2608 protocol = htons(ETH_P_MPLS_UC); 2609 2610 if (pkt_dev->vlan_id != 0xffff) 2611 protocol = htons(ETH_P_8021Q); 2612 2613 /* Update any of the values, used when we're incrementing various 2614 * fields. 2615 */ 2616 queue_map = pkt_dev->cur_queue_map; 2617 mod_cur_headers(pkt_dev); 2618 2619 datalen = (odev->hard_header_len + 16) & ~0xf; 2620 2621 if (pkt_dev->flags & F_NODE) { 2622 int node; 2623 2624 if (pkt_dev->node >= 0) 2625 node = pkt_dev->node; 2626 else 2627 node = numa_node_id(); 2628 2629 skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64 2630 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node); 2631 if (likely(skb)) { 2632 skb_reserve(skb, NET_SKB_PAD); 2633 skb->dev = odev; 2634 } 2635 } 2636 else 2637 skb = __netdev_alloc_skb(odev, 2638 pkt_dev->cur_pkt_size + 64 2639 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT); 2640 2641 if (!skb) { 2642 sprintf(pkt_dev->result, "No memory"); 2643 return NULL; 2644 } 2645 2646 skb_reserve(skb, datalen); 2647 2648 /* Reserve for ethernet and IP header */ 2649 eth = (__u8 *) skb_push(skb, 14); 2650 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2651 if (pkt_dev->nr_labels) 2652 mpls_push(mpls, pkt_dev); 2653 2654 if (pkt_dev->vlan_id != 0xffff) { 2655 if (pkt_dev->svlan_id != 0xffff) { 2656 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2657 *svlan_tci = build_tci(pkt_dev->svlan_id, 2658 pkt_dev->svlan_cfi, 2659 pkt_dev->svlan_p); 2660 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2661 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2662 } 2663 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2664 *vlan_tci = build_tci(pkt_dev->vlan_id, 2665 pkt_dev->vlan_cfi, 2666 pkt_dev->vlan_p); 2667 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2668 *vlan_encapsulated_proto = htons(ETH_P_IP); 2669 } 2670 2671 skb->network_header = skb->tail; 2672 skb->transport_header = skb->network_header + sizeof(struct iphdr); 2673 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr)); 2674 skb_set_queue_mapping(skb, queue_map); 2675 iph = ip_hdr(skb); 2676 udph = udp_hdr(skb); 2677 2678 memcpy(eth, pkt_dev->hh, 12); 2679 *(__be16 *) & eth[12] = protocol; 2680 2681 /* Eth + IPh + UDPh + mpls */ 2682 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2683 pkt_dev->pkt_overhead; 2684 if (datalen < sizeof(struct pktgen_hdr)) 2685 datalen = sizeof(struct pktgen_hdr); 2686 2687 udph->source = htons(pkt_dev->cur_udp_src); 2688 udph->dest = htons(pkt_dev->cur_udp_dst); 2689 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2690 udph->check = 0; /* No checksum */ 2691 2692 iph->ihl = 5; 2693 iph->version = 4; 2694 iph->ttl = 32; 2695 iph->tos = pkt_dev->tos; 2696 iph->protocol = IPPROTO_UDP; /* UDP */ 2697 iph->saddr = pkt_dev->cur_saddr; 2698 iph->daddr = pkt_dev->cur_daddr; 2699 iph->id = htons(pkt_dev->ip_id); 2700 pkt_dev->ip_id++; 2701 iph->frag_off = 0; 2702 iplen = 20 + 8 + datalen; 2703 iph->tot_len = htons(iplen); 2704 iph->check = 0; 2705 iph->check = ip_fast_csum((void *)iph, iph->ihl); 2706 skb->protocol = protocol; 2707 skb->mac_header = (skb->network_header - ETH_HLEN - 2708 pkt_dev->pkt_overhead); 2709 skb->dev = odev; 2710 skb->pkt_type = PACKET_HOST; 2711 2712 if (pkt_dev->nfrags <= 0) { 2713 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 2714 memset(pgh + 1, 0, datalen - sizeof(struct pktgen_hdr)); 2715 } else { 2716 int frags = pkt_dev->nfrags; 2717 int i, len; 2718 2719 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 2720 2721 if (frags > MAX_SKB_FRAGS) 2722 frags = MAX_SKB_FRAGS; 2723 if (datalen > frags * PAGE_SIZE) { 2724 len = datalen - frags * PAGE_SIZE; 2725 memset(skb_put(skb, len), 0, len); 2726 datalen = frags * PAGE_SIZE; 2727 } 2728 2729 i = 0; 2730 while (datalen > 0) { 2731 struct page *page = alloc_pages(GFP_KERNEL | __GFP_ZERO, 0); 2732 skb_shinfo(skb)->frags[i].page = page; 2733 skb_shinfo(skb)->frags[i].page_offset = 0; 2734 skb_shinfo(skb)->frags[i].size = 2735 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 2736 datalen -= skb_shinfo(skb)->frags[i].size; 2737 skb->len += skb_shinfo(skb)->frags[i].size; 2738 skb->data_len += skb_shinfo(skb)->frags[i].size; 2739 i++; 2740 skb_shinfo(skb)->nr_frags = i; 2741 } 2742 2743 while (i < frags) { 2744 int rem; 2745 2746 if (i == 0) 2747 break; 2748 2749 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 2750 if (rem == 0) 2751 break; 2752 2753 skb_shinfo(skb)->frags[i - 1].size -= rem; 2754 2755 skb_shinfo(skb)->frags[i] = 2756 skb_shinfo(skb)->frags[i - 1]; 2757 get_page(skb_shinfo(skb)->frags[i].page); 2758 skb_shinfo(skb)->frags[i].page = 2759 skb_shinfo(skb)->frags[i - 1].page; 2760 skb_shinfo(skb)->frags[i].page_offset += 2761 skb_shinfo(skb)->frags[i - 1].size; 2762 skb_shinfo(skb)->frags[i].size = rem; 2763 i++; 2764 skb_shinfo(skb)->nr_frags = i; 2765 } 2766 } 2767 2768 /* Stamp the time, and sequence number, 2769 * convert them to network byte order 2770 */ 2771 if (pgh) { 2772 struct timeval timestamp; 2773 2774 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2775 pgh->seq_num = htonl(pkt_dev->seq_num); 2776 2777 do_gettimeofday(×tamp); 2778 pgh->tv_sec = htonl(timestamp.tv_sec); 2779 pgh->tv_usec = htonl(timestamp.tv_usec); 2780 } 2781 2782 #ifdef CONFIG_XFRM 2783 if (!process_ipsec(pkt_dev, skb, protocol)) 2784 return NULL; 2785 #endif 2786 2787 return skb; 2788 } 2789 2790 /* 2791 * scan_ip6, fmt_ip taken from dietlibc-0.21 2792 * Author Felix von Leitner <felix-dietlibc@fefe.de> 2793 * 2794 * Slightly modified for kernel. 2795 * Should be candidate for net/ipv4/utils.c 2796 * --ro 2797 */ 2798 2799 static unsigned int scan_ip6(const char *s, char ip[16]) 2800 { 2801 unsigned int i; 2802 unsigned int len = 0; 2803 unsigned long u; 2804 char suffix[16]; 2805 unsigned int prefixlen = 0; 2806 unsigned int suffixlen = 0; 2807 __be32 tmp; 2808 char *pos; 2809 2810 for (i = 0; i < 16; i++) 2811 ip[i] = 0; 2812 2813 for (;;) { 2814 if (*s == ':') { 2815 len++; 2816 if (s[1] == ':') { /* Found "::", skip to part 2 */ 2817 s += 2; 2818 len++; 2819 break; 2820 } 2821 s++; 2822 } 2823 2824 u = simple_strtoul(s, &pos, 16); 2825 i = pos - s; 2826 if (!i) 2827 return 0; 2828 if (prefixlen == 12 && s[i] == '.') { 2829 2830 /* the last 4 bytes may be written as IPv4 address */ 2831 2832 tmp = in_aton(s); 2833 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp)); 2834 return i + len; 2835 } 2836 ip[prefixlen++] = (u >> 8); 2837 ip[prefixlen++] = (u & 255); 2838 s += i; 2839 len += i; 2840 if (prefixlen == 16) 2841 return len; 2842 } 2843 2844 /* part 2, after "::" */ 2845 for (;;) { 2846 if (*s == ':') { 2847 if (suffixlen == 0) 2848 break; 2849 s++; 2850 len++; 2851 } else if (suffixlen != 0) 2852 break; 2853 2854 u = simple_strtol(s, &pos, 16); 2855 i = pos - s; 2856 if (!i) { 2857 if (*s) 2858 len--; 2859 break; 2860 } 2861 if (suffixlen + prefixlen <= 12 && s[i] == '.') { 2862 tmp = in_aton(s); 2863 memcpy((struct in_addr *)(suffix + suffixlen), &tmp, 2864 sizeof(tmp)); 2865 suffixlen += 4; 2866 len += strlen(s); 2867 break; 2868 } 2869 suffix[suffixlen++] = (u >> 8); 2870 suffix[suffixlen++] = (u & 255); 2871 s += i; 2872 len += i; 2873 if (prefixlen + suffixlen == 16) 2874 break; 2875 } 2876 for (i = 0; i < suffixlen; i++) 2877 ip[16 - suffixlen + i] = suffix[i]; 2878 return len; 2879 } 2880 2881 static char tohex(char hexdigit) 2882 { 2883 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0'; 2884 } 2885 2886 static int fmt_xlong(char *s, unsigned int i) 2887 { 2888 char *bak = s; 2889 *s = tohex((i >> 12) & 0xf); 2890 if (s != bak || *s != '0') 2891 ++s; 2892 *s = tohex((i >> 8) & 0xf); 2893 if (s != bak || *s != '0') 2894 ++s; 2895 *s = tohex((i >> 4) & 0xf); 2896 if (s != bak || *s != '0') 2897 ++s; 2898 *s = tohex(i & 0xf); 2899 return s - bak + 1; 2900 } 2901 2902 static unsigned int fmt_ip6(char *s, const char ip[16]) 2903 { 2904 unsigned int len; 2905 unsigned int i; 2906 unsigned int temp; 2907 unsigned int compressing; 2908 int j; 2909 2910 len = 0; 2911 compressing = 0; 2912 for (j = 0; j < 16; j += 2) { 2913 2914 #ifdef V4MAPPEDPREFIX 2915 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) { 2916 inet_ntoa_r(*(struct in_addr *)(ip + 12), s); 2917 temp = strlen(s); 2918 return len + temp; 2919 } 2920 #endif 2921 temp = ((unsigned long)(unsigned char)ip[j] << 8) + 2922 (unsigned long)(unsigned char)ip[j + 1]; 2923 if (temp == 0) { 2924 if (!compressing) { 2925 compressing = 1; 2926 if (j == 0) { 2927 *s++ = ':'; 2928 ++len; 2929 } 2930 } 2931 } else { 2932 if (compressing) { 2933 compressing = 0; 2934 *s++ = ':'; 2935 ++len; 2936 } 2937 i = fmt_xlong(s, temp); 2938 len += i; 2939 s += i; 2940 if (j < 14) { 2941 *s++ = ':'; 2942 ++len; 2943 } 2944 } 2945 } 2946 if (compressing) { 2947 *s++ = ':'; 2948 ++len; 2949 } 2950 *s = 0; 2951 return len; 2952 } 2953 2954 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2955 struct pktgen_dev *pkt_dev) 2956 { 2957 struct sk_buff *skb = NULL; 2958 __u8 *eth; 2959 struct udphdr *udph; 2960 int datalen; 2961 struct ipv6hdr *iph; 2962 struct pktgen_hdr *pgh = NULL; 2963 __be16 protocol = htons(ETH_P_IPV6); 2964 __be32 *mpls; 2965 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2966 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2967 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2968 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2969 u16 queue_map; 2970 2971 if (pkt_dev->nr_labels) 2972 protocol = htons(ETH_P_MPLS_UC); 2973 2974 if (pkt_dev->vlan_id != 0xffff) 2975 protocol = htons(ETH_P_8021Q); 2976 2977 /* Update any of the values, used when we're incrementing various 2978 * fields. 2979 */ 2980 queue_map = pkt_dev->cur_queue_map; 2981 mod_cur_headers(pkt_dev); 2982 2983 skb = __netdev_alloc_skb(odev, 2984 pkt_dev->cur_pkt_size + 64 2985 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT); 2986 if (!skb) { 2987 sprintf(pkt_dev->result, "No memory"); 2988 return NULL; 2989 } 2990 2991 skb_reserve(skb, 16); 2992 2993 /* Reserve for ethernet and IP header */ 2994 eth = (__u8 *) skb_push(skb, 14); 2995 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2996 if (pkt_dev->nr_labels) 2997 mpls_push(mpls, pkt_dev); 2998 2999 if (pkt_dev->vlan_id != 0xffff) { 3000 if (pkt_dev->svlan_id != 0xffff) { 3001 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 3002 *svlan_tci = build_tci(pkt_dev->svlan_id, 3003 pkt_dev->svlan_cfi, 3004 pkt_dev->svlan_p); 3005 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 3006 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 3007 } 3008 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 3009 *vlan_tci = build_tci(pkt_dev->vlan_id, 3010 pkt_dev->vlan_cfi, 3011 pkt_dev->vlan_p); 3012 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 3013 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 3014 } 3015 3016 skb->network_header = skb->tail; 3017 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr); 3018 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr)); 3019 skb_set_queue_mapping(skb, queue_map); 3020 iph = ipv6_hdr(skb); 3021 udph = udp_hdr(skb); 3022 3023 memcpy(eth, pkt_dev->hh, 12); 3024 *(__be16 *) ð[12] = protocol; 3025 3026 /* Eth + IPh + UDPh + mpls */ 3027 datalen = pkt_dev->cur_pkt_size - 14 - 3028 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 3029 pkt_dev->pkt_overhead; 3030 3031 if (datalen < sizeof(struct pktgen_hdr)) { 3032 datalen = sizeof(struct pktgen_hdr); 3033 if (net_ratelimit()) 3034 pr_info("increased datalen to %d\n", datalen); 3035 } 3036 3037 udph->source = htons(pkt_dev->cur_udp_src); 3038 udph->dest = htons(pkt_dev->cur_udp_dst); 3039 udph->len = htons(datalen + sizeof(struct udphdr)); 3040 udph->check = 0; /* No checksum */ 3041 3042 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 3043 3044 if (pkt_dev->traffic_class) { 3045 /* Version + traffic class + flow (0) */ 3046 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 3047 } 3048 3049 iph->hop_limit = 32; 3050 3051 iph->payload_len = htons(sizeof(struct udphdr) + datalen); 3052 iph->nexthdr = IPPROTO_UDP; 3053 3054 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr); 3055 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr); 3056 3057 skb->mac_header = (skb->network_header - ETH_HLEN - 3058 pkt_dev->pkt_overhead); 3059 skb->protocol = protocol; 3060 skb->dev = odev; 3061 skb->pkt_type = PACKET_HOST; 3062 3063 if (pkt_dev->nfrags <= 0) 3064 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 3065 else { 3066 int frags = pkt_dev->nfrags; 3067 int i; 3068 3069 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 3070 3071 if (frags > MAX_SKB_FRAGS) 3072 frags = MAX_SKB_FRAGS; 3073 if (datalen > frags * PAGE_SIZE) { 3074 skb_put(skb, datalen - frags * PAGE_SIZE); 3075 datalen = frags * PAGE_SIZE; 3076 } 3077 3078 i = 0; 3079 while (datalen > 0) { 3080 struct page *page = alloc_pages(GFP_KERNEL, 0); 3081 skb_shinfo(skb)->frags[i].page = page; 3082 skb_shinfo(skb)->frags[i].page_offset = 0; 3083 skb_shinfo(skb)->frags[i].size = 3084 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 3085 datalen -= skb_shinfo(skb)->frags[i].size; 3086 skb->len += skb_shinfo(skb)->frags[i].size; 3087 skb->data_len += skb_shinfo(skb)->frags[i].size; 3088 i++; 3089 skb_shinfo(skb)->nr_frags = i; 3090 } 3091 3092 while (i < frags) { 3093 int rem; 3094 3095 if (i == 0) 3096 break; 3097 3098 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 3099 if (rem == 0) 3100 break; 3101 3102 skb_shinfo(skb)->frags[i - 1].size -= rem; 3103 3104 skb_shinfo(skb)->frags[i] = 3105 skb_shinfo(skb)->frags[i - 1]; 3106 get_page(skb_shinfo(skb)->frags[i].page); 3107 skb_shinfo(skb)->frags[i].page = 3108 skb_shinfo(skb)->frags[i - 1].page; 3109 skb_shinfo(skb)->frags[i].page_offset += 3110 skb_shinfo(skb)->frags[i - 1].size; 3111 skb_shinfo(skb)->frags[i].size = rem; 3112 i++; 3113 skb_shinfo(skb)->nr_frags = i; 3114 } 3115 } 3116 3117 /* Stamp the time, and sequence number, 3118 * convert them to network byte order 3119 * should we update cloned packets too ? 3120 */ 3121 if (pgh) { 3122 struct timeval timestamp; 3123 3124 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 3125 pgh->seq_num = htonl(pkt_dev->seq_num); 3126 3127 do_gettimeofday(×tamp); 3128 pgh->tv_sec = htonl(timestamp.tv_sec); 3129 pgh->tv_usec = htonl(timestamp.tv_usec); 3130 } 3131 /* pkt_dev->seq_num++; FF: you really mean this? */ 3132 3133 return skb; 3134 } 3135 3136 static struct sk_buff *fill_packet(struct net_device *odev, 3137 struct pktgen_dev *pkt_dev) 3138 { 3139 if (pkt_dev->flags & F_IPV6) 3140 return fill_packet_ipv6(odev, pkt_dev); 3141 else 3142 return fill_packet_ipv4(odev, pkt_dev); 3143 } 3144 3145 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 3146 { 3147 pkt_dev->seq_num = 1; 3148 pkt_dev->idle_acc = 0; 3149 pkt_dev->sofar = 0; 3150 pkt_dev->tx_bytes = 0; 3151 pkt_dev->errors = 0; 3152 } 3153 3154 /* Set up structure for sending pkts, clear counters */ 3155 3156 static void pktgen_run(struct pktgen_thread *t) 3157 { 3158 struct pktgen_dev *pkt_dev; 3159 int started = 0; 3160 3161 func_enter(); 3162 3163 if_lock(t); 3164 list_for_each_entry(pkt_dev, &t->if_list, list) { 3165 3166 /* 3167 * setup odev and create initial packet. 3168 */ 3169 pktgen_setup_inject(pkt_dev); 3170 3171 if (pkt_dev->odev) { 3172 pktgen_clear_counters(pkt_dev); 3173 pkt_dev->running = 1; /* Cranke yeself! */ 3174 pkt_dev->skb = NULL; 3175 pkt_dev->started_at = 3176 pkt_dev->next_tx = ktime_now(); 3177 3178 set_pkt_overhead(pkt_dev); 3179 3180 strcpy(pkt_dev->result, "Starting"); 3181 started++; 3182 } else 3183 strcpy(pkt_dev->result, "Error starting"); 3184 } 3185 if_unlock(t); 3186 if (started) 3187 t->control &= ~(T_STOP); 3188 } 3189 3190 static void pktgen_stop_all_threads_ifs(void) 3191 { 3192 struct pktgen_thread *t; 3193 3194 func_enter(); 3195 3196 mutex_lock(&pktgen_thread_lock); 3197 3198 list_for_each_entry(t, &pktgen_threads, th_list) 3199 t->control |= T_STOP; 3200 3201 mutex_unlock(&pktgen_thread_lock); 3202 } 3203 3204 static int thread_is_running(const struct pktgen_thread *t) 3205 { 3206 const struct pktgen_dev *pkt_dev; 3207 3208 list_for_each_entry(pkt_dev, &t->if_list, list) 3209 if (pkt_dev->running) 3210 return 1; 3211 return 0; 3212 } 3213 3214 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3215 { 3216 if_lock(t); 3217 3218 while (thread_is_running(t)) { 3219 3220 if_unlock(t); 3221 3222 msleep_interruptible(100); 3223 3224 if (signal_pending(current)) 3225 goto signal; 3226 if_lock(t); 3227 } 3228 if_unlock(t); 3229 return 1; 3230 signal: 3231 return 0; 3232 } 3233 3234 static int pktgen_wait_all_threads_run(void) 3235 { 3236 struct pktgen_thread *t; 3237 int sig = 1; 3238 3239 mutex_lock(&pktgen_thread_lock); 3240 3241 list_for_each_entry(t, &pktgen_threads, th_list) { 3242 sig = pktgen_wait_thread_run(t); 3243 if (sig == 0) 3244 break; 3245 } 3246 3247 if (sig == 0) 3248 list_for_each_entry(t, &pktgen_threads, th_list) 3249 t->control |= (T_STOP); 3250 3251 mutex_unlock(&pktgen_thread_lock); 3252 return sig; 3253 } 3254 3255 static void pktgen_run_all_threads(void) 3256 { 3257 struct pktgen_thread *t; 3258 3259 func_enter(); 3260 3261 mutex_lock(&pktgen_thread_lock); 3262 3263 list_for_each_entry(t, &pktgen_threads, th_list) 3264 t->control |= (T_RUN); 3265 3266 mutex_unlock(&pktgen_thread_lock); 3267 3268 /* Propagate thread->control */ 3269 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3270 3271 pktgen_wait_all_threads_run(); 3272 } 3273 3274 static void pktgen_reset_all_threads(void) 3275 { 3276 struct pktgen_thread *t; 3277 3278 func_enter(); 3279 3280 mutex_lock(&pktgen_thread_lock); 3281 3282 list_for_each_entry(t, &pktgen_threads, th_list) 3283 t->control |= (T_REMDEVALL); 3284 3285 mutex_unlock(&pktgen_thread_lock); 3286 3287 /* Propagate thread->control */ 3288 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3289 3290 pktgen_wait_all_threads_run(); 3291 } 3292 3293 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3294 { 3295 __u64 bps, mbps, pps; 3296 char *p = pkt_dev->result; 3297 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3298 pkt_dev->started_at); 3299 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3300 3301 p += sprintf(p, "OK: %llu(c%llu+d%llu) nsec, %llu (%dbyte,%dfrags)\n", 3302 (unsigned long long)ktime_to_us(elapsed), 3303 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3304 (unsigned long long)ktime_to_us(idle), 3305 (unsigned long long)pkt_dev->sofar, 3306 pkt_dev->cur_pkt_size, nr_frags); 3307 3308 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3309 ktime_to_ns(elapsed)); 3310 3311 bps = pps * 8 * pkt_dev->cur_pkt_size; 3312 3313 mbps = bps; 3314 do_div(mbps, 1000000); 3315 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3316 (unsigned long long)pps, 3317 (unsigned long long)mbps, 3318 (unsigned long long)bps, 3319 (unsigned long long)pkt_dev->errors); 3320 } 3321 3322 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3323 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3324 { 3325 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3326 3327 if (!pkt_dev->running) { 3328 pr_warning("interface: %s is already stopped\n", 3329 pkt_dev->odevname); 3330 return -EINVAL; 3331 } 3332 3333 kfree_skb(pkt_dev->skb); 3334 pkt_dev->skb = NULL; 3335 pkt_dev->stopped_at = ktime_now(); 3336 pkt_dev->running = 0; 3337 3338 show_results(pkt_dev, nr_frags); 3339 3340 return 0; 3341 } 3342 3343 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3344 { 3345 struct pktgen_dev *pkt_dev, *best = NULL; 3346 3347 if_lock(t); 3348 3349 list_for_each_entry(pkt_dev, &t->if_list, list) { 3350 if (!pkt_dev->running) 3351 continue; 3352 if (best == NULL) 3353 best = pkt_dev; 3354 else if (ktime_lt(pkt_dev->next_tx, best->next_tx)) 3355 best = pkt_dev; 3356 } 3357 if_unlock(t); 3358 return best; 3359 } 3360 3361 static void pktgen_stop(struct pktgen_thread *t) 3362 { 3363 struct pktgen_dev *pkt_dev; 3364 3365 func_enter(); 3366 3367 if_lock(t); 3368 3369 list_for_each_entry(pkt_dev, &t->if_list, list) { 3370 pktgen_stop_device(pkt_dev); 3371 } 3372 3373 if_unlock(t); 3374 } 3375 3376 /* 3377 * one of our devices needs to be removed - find it 3378 * and remove it 3379 */ 3380 static void pktgen_rem_one_if(struct pktgen_thread *t) 3381 { 3382 struct list_head *q, *n; 3383 struct pktgen_dev *cur; 3384 3385 func_enter(); 3386 3387 if_lock(t); 3388 3389 list_for_each_safe(q, n, &t->if_list) { 3390 cur = list_entry(q, struct pktgen_dev, list); 3391 3392 if (!cur->removal_mark) 3393 continue; 3394 3395 kfree_skb(cur->skb); 3396 cur->skb = NULL; 3397 3398 pktgen_remove_device(t, cur); 3399 3400 break; 3401 } 3402 3403 if_unlock(t); 3404 } 3405 3406 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3407 { 3408 struct list_head *q, *n; 3409 struct pktgen_dev *cur; 3410 3411 func_enter(); 3412 3413 /* Remove all devices, free mem */ 3414 3415 if_lock(t); 3416 3417 list_for_each_safe(q, n, &t->if_list) { 3418 cur = list_entry(q, struct pktgen_dev, list); 3419 3420 kfree_skb(cur->skb); 3421 cur->skb = NULL; 3422 3423 pktgen_remove_device(t, cur); 3424 } 3425 3426 if_unlock(t); 3427 } 3428 3429 static void pktgen_rem_thread(struct pktgen_thread *t) 3430 { 3431 /* Remove from the thread list */ 3432 3433 remove_proc_entry(t->tsk->comm, pg_proc_dir); 3434 3435 mutex_lock(&pktgen_thread_lock); 3436 3437 list_del(&t->th_list); 3438 3439 mutex_unlock(&pktgen_thread_lock); 3440 } 3441 3442 static void pktgen_resched(struct pktgen_dev *pkt_dev) 3443 { 3444 ktime_t idle_start = ktime_now(); 3445 schedule(); 3446 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3447 } 3448 3449 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) 3450 { 3451 ktime_t idle_start = ktime_now(); 3452 3453 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3454 if (signal_pending(current)) 3455 break; 3456 3457 if (need_resched()) 3458 pktgen_resched(pkt_dev); 3459 else 3460 cpu_relax(); 3461 } 3462 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3463 } 3464 3465 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3466 { 3467 struct net_device *odev = pkt_dev->odev; 3468 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *) 3469 = odev->netdev_ops->ndo_start_xmit; 3470 struct netdev_queue *txq; 3471 u16 queue_map; 3472 int ret; 3473 3474 /* If device is offline, then don't send */ 3475 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { 3476 pktgen_stop_device(pkt_dev); 3477 return; 3478 } 3479 3480 /* This is max DELAY, this has special meaning of 3481 * "never transmit" 3482 */ 3483 if (unlikely(pkt_dev->delay == ULLONG_MAX)) { 3484 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX); 3485 return; 3486 } 3487 3488 /* If no skb or clone count exhausted then get new one */ 3489 if (!pkt_dev->skb || (pkt_dev->last_ok && 3490 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { 3491 /* build a new pkt */ 3492 kfree_skb(pkt_dev->skb); 3493 3494 pkt_dev->skb = fill_packet(odev, pkt_dev); 3495 if (pkt_dev->skb == NULL) { 3496 pr_err("ERROR: couldn't allocate skb in fill_packet\n"); 3497 schedule(); 3498 pkt_dev->clone_count--; /* back out increment, OOM */ 3499 return; 3500 } 3501 pkt_dev->last_pkt_size = pkt_dev->skb->len; 3502 pkt_dev->allocated_skbs++; 3503 pkt_dev->clone_count = 0; /* reset counter */ 3504 } 3505 3506 if (pkt_dev->delay && pkt_dev->last_ok) 3507 spin(pkt_dev, pkt_dev->next_tx); 3508 3509 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3510 txq = netdev_get_tx_queue(odev, queue_map); 3511 3512 __netif_tx_lock_bh(txq); 3513 3514 if (unlikely(netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq))) { 3515 ret = NETDEV_TX_BUSY; 3516 pkt_dev->last_ok = 0; 3517 goto unlock; 3518 } 3519 atomic_inc(&(pkt_dev->skb->users)); 3520 ret = (*xmit)(pkt_dev->skb, odev); 3521 3522 switch (ret) { 3523 case NETDEV_TX_OK: 3524 txq_trans_update(txq); 3525 pkt_dev->last_ok = 1; 3526 pkt_dev->sofar++; 3527 pkt_dev->seq_num++; 3528 pkt_dev->tx_bytes += pkt_dev->last_pkt_size; 3529 break; 3530 case NET_XMIT_DROP: 3531 case NET_XMIT_CN: 3532 case NET_XMIT_POLICED: 3533 /* skb has been consumed */ 3534 pkt_dev->errors++; 3535 break; 3536 default: /* Drivers are not supposed to return other values! */ 3537 if (net_ratelimit()) 3538 pr_info("pktgen: %s xmit error: %d\n", 3539 pkt_dev->odevname, ret); 3540 pkt_dev->errors++; 3541 /* fallthru */ 3542 case NETDEV_TX_LOCKED: 3543 case NETDEV_TX_BUSY: 3544 /* Retry it next time */ 3545 atomic_dec(&(pkt_dev->skb->users)); 3546 pkt_dev->last_ok = 0; 3547 } 3548 unlock: 3549 __netif_tx_unlock_bh(txq); 3550 3551 /* If pkt_dev->count is zero, then run forever */ 3552 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3553 pktgen_wait_for_skb(pkt_dev); 3554 3555 /* Done with this */ 3556 pktgen_stop_device(pkt_dev); 3557 } 3558 } 3559 3560 /* 3561 * Main loop of the thread goes here 3562 */ 3563 3564 static int pktgen_thread_worker(void *arg) 3565 { 3566 DEFINE_WAIT(wait); 3567 struct pktgen_thread *t = arg; 3568 struct pktgen_dev *pkt_dev = NULL; 3569 int cpu = t->cpu; 3570 3571 BUG_ON(smp_processor_id() != cpu); 3572 3573 init_waitqueue_head(&t->queue); 3574 complete(&t->start_done); 3575 3576 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); 3577 3578 set_current_state(TASK_INTERRUPTIBLE); 3579 3580 set_freezable(); 3581 3582 while (!kthread_should_stop()) { 3583 pkt_dev = next_to_run(t); 3584 3585 if (unlikely(!pkt_dev && t->control == 0)) { 3586 wait_event_interruptible_timeout(t->queue, 3587 t->control != 0, 3588 HZ/10); 3589 try_to_freeze(); 3590 continue; 3591 } 3592 3593 __set_current_state(TASK_RUNNING); 3594 3595 if (likely(pkt_dev)) { 3596 pktgen_xmit(pkt_dev); 3597 3598 if (need_resched()) 3599 pktgen_resched(pkt_dev); 3600 else 3601 cpu_relax(); 3602 } 3603 3604 if (t->control & T_STOP) { 3605 pktgen_stop(t); 3606 t->control &= ~(T_STOP); 3607 } 3608 3609 if (t->control & T_RUN) { 3610 pktgen_run(t); 3611 t->control &= ~(T_RUN); 3612 } 3613 3614 if (t->control & T_REMDEVALL) { 3615 pktgen_rem_all_ifs(t); 3616 t->control &= ~(T_REMDEVALL); 3617 } 3618 3619 if (t->control & T_REMDEV) { 3620 pktgen_rem_one_if(t); 3621 t->control &= ~(T_REMDEV); 3622 } 3623 3624 try_to_freeze(); 3625 3626 set_current_state(TASK_INTERRUPTIBLE); 3627 } 3628 3629 pr_debug("%s stopping all device\n", t->tsk->comm); 3630 pktgen_stop(t); 3631 3632 pr_debug("%s removing all device\n", t->tsk->comm); 3633 pktgen_rem_all_ifs(t); 3634 3635 pr_debug("%s removing thread\n", t->tsk->comm); 3636 pktgen_rem_thread(t); 3637 3638 return 0; 3639 } 3640 3641 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3642 const char *ifname, bool exact) 3643 { 3644 struct pktgen_dev *p, *pkt_dev = NULL; 3645 size_t len = strlen(ifname); 3646 3647 if_lock(t); 3648 list_for_each_entry(p, &t->if_list, list) 3649 if (strncmp(p->odevname, ifname, len) == 0) { 3650 if (p->odevname[len]) { 3651 if (exact || p->odevname[len] != '@') 3652 continue; 3653 } 3654 pkt_dev = p; 3655 break; 3656 } 3657 3658 if_unlock(t); 3659 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev); 3660 return pkt_dev; 3661 } 3662 3663 /* 3664 * Adds a dev at front of if_list. 3665 */ 3666 3667 static int add_dev_to_thread(struct pktgen_thread *t, 3668 struct pktgen_dev *pkt_dev) 3669 { 3670 int rv = 0; 3671 3672 if_lock(t); 3673 3674 if (pkt_dev->pg_thread) { 3675 pr_err("ERROR: already assigned to a thread\n"); 3676 rv = -EBUSY; 3677 goto out; 3678 } 3679 3680 list_add(&pkt_dev->list, &t->if_list); 3681 pkt_dev->pg_thread = t; 3682 pkt_dev->running = 0; 3683 3684 out: 3685 if_unlock(t); 3686 return rv; 3687 } 3688 3689 /* Called under thread lock */ 3690 3691 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3692 { 3693 struct pktgen_dev *pkt_dev; 3694 int err; 3695 int node = cpu_to_node(t->cpu); 3696 3697 /* We don't allow a device to be on several threads */ 3698 3699 pkt_dev = __pktgen_NN_threads(ifname, FIND); 3700 if (pkt_dev) { 3701 pr_err("ERROR: interface already used\n"); 3702 return -EBUSY; 3703 } 3704 3705 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); 3706 if (!pkt_dev) 3707 return -ENOMEM; 3708 3709 strcpy(pkt_dev->odevname, ifname); 3710 pkt_dev->flows = vmalloc_node(MAX_CFLOWS * sizeof(struct flow_state), 3711 node); 3712 if (pkt_dev->flows == NULL) { 3713 kfree(pkt_dev); 3714 return -ENOMEM; 3715 } 3716 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state)); 3717 3718 pkt_dev->removal_mark = 0; 3719 pkt_dev->min_pkt_size = ETH_ZLEN; 3720 pkt_dev->max_pkt_size = ETH_ZLEN; 3721 pkt_dev->nfrags = 0; 3722 pkt_dev->clone_skb = pg_clone_skb_d; 3723 pkt_dev->delay = pg_delay_d; 3724 pkt_dev->count = pg_count_d; 3725 pkt_dev->sofar = 0; 3726 pkt_dev->udp_src_min = 9; /* sink port */ 3727 pkt_dev->udp_src_max = 9; 3728 pkt_dev->udp_dst_min = 9; 3729 pkt_dev->udp_dst_max = 9; 3730 3731 pkt_dev->vlan_p = 0; 3732 pkt_dev->vlan_cfi = 0; 3733 pkt_dev->vlan_id = 0xffff; 3734 pkt_dev->svlan_p = 0; 3735 pkt_dev->svlan_cfi = 0; 3736 pkt_dev->svlan_id = 0xffff; 3737 pkt_dev->node = -1; 3738 3739 err = pktgen_setup_dev(pkt_dev, ifname); 3740 if (err) 3741 goto out1; 3742 3743 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir, 3744 &pktgen_if_fops, pkt_dev); 3745 if (!pkt_dev->entry) { 3746 pr_err("cannot create %s/%s procfs entry\n", 3747 PG_PROC_DIR, ifname); 3748 err = -EINVAL; 3749 goto out2; 3750 } 3751 #ifdef CONFIG_XFRM 3752 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3753 pkt_dev->ipsproto = IPPROTO_ESP; 3754 #endif 3755 3756 return add_dev_to_thread(t, pkt_dev); 3757 out2: 3758 dev_put(pkt_dev->odev); 3759 out1: 3760 #ifdef CONFIG_XFRM 3761 free_SAs(pkt_dev); 3762 #endif 3763 vfree(pkt_dev->flows); 3764 kfree(pkt_dev); 3765 return err; 3766 } 3767 3768 static int __init pktgen_create_thread(int cpu) 3769 { 3770 struct pktgen_thread *t; 3771 struct proc_dir_entry *pe; 3772 struct task_struct *p; 3773 3774 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL, 3775 cpu_to_node(cpu)); 3776 if (!t) { 3777 pr_err("ERROR: out of memory, can't create new thread\n"); 3778 return -ENOMEM; 3779 } 3780 3781 spin_lock_init(&t->if_lock); 3782 t->cpu = cpu; 3783 3784 INIT_LIST_HEAD(&t->if_list); 3785 3786 list_add_tail(&t->th_list, &pktgen_threads); 3787 init_completion(&t->start_done); 3788 3789 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu); 3790 if (IS_ERR(p)) { 3791 pr_err("kernel_thread() failed for cpu %d\n", t->cpu); 3792 list_del(&t->th_list); 3793 kfree(t); 3794 return PTR_ERR(p); 3795 } 3796 kthread_bind(p, cpu); 3797 t->tsk = p; 3798 3799 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir, 3800 &pktgen_thread_fops, t); 3801 if (!pe) { 3802 pr_err("cannot create %s/%s procfs entry\n", 3803 PG_PROC_DIR, t->tsk->comm); 3804 kthread_stop(p); 3805 list_del(&t->th_list); 3806 kfree(t); 3807 return -EINVAL; 3808 } 3809 3810 wake_up_process(p); 3811 wait_for_completion(&t->start_done); 3812 3813 return 0; 3814 } 3815 3816 /* 3817 * Removes a device from the thread if_list. 3818 */ 3819 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3820 struct pktgen_dev *pkt_dev) 3821 { 3822 struct list_head *q, *n; 3823 struct pktgen_dev *p; 3824 3825 list_for_each_safe(q, n, &t->if_list) { 3826 p = list_entry(q, struct pktgen_dev, list); 3827 if (p == pkt_dev) 3828 list_del(&p->list); 3829 } 3830 } 3831 3832 static int pktgen_remove_device(struct pktgen_thread *t, 3833 struct pktgen_dev *pkt_dev) 3834 { 3835 3836 pr_debug("remove_device pkt_dev=%p\n", pkt_dev); 3837 3838 if (pkt_dev->running) { 3839 pr_warning("WARNING: trying to remove a running interface, stopping it now\n"); 3840 pktgen_stop_device(pkt_dev); 3841 } 3842 3843 /* Dis-associate from the interface */ 3844 3845 if (pkt_dev->odev) { 3846 dev_put(pkt_dev->odev); 3847 pkt_dev->odev = NULL; 3848 } 3849 3850 /* And update the thread if_list */ 3851 3852 _rem_dev_from_if_list(t, pkt_dev); 3853 3854 if (pkt_dev->entry) 3855 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 3856 3857 #ifdef CONFIG_XFRM 3858 free_SAs(pkt_dev); 3859 #endif 3860 vfree(pkt_dev->flows); 3861 kfree(pkt_dev); 3862 return 0; 3863 } 3864 3865 static int __init pg_init(void) 3866 { 3867 int cpu; 3868 struct proc_dir_entry *pe; 3869 3870 pr_info("%s", version); 3871 3872 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net); 3873 if (!pg_proc_dir) 3874 return -ENODEV; 3875 3876 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops); 3877 if (pe == NULL) { 3878 pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL); 3879 proc_net_remove(&init_net, PG_PROC_DIR); 3880 return -EINVAL; 3881 } 3882 3883 /* Register us to receive netdevice events */ 3884 register_netdevice_notifier(&pktgen_notifier_block); 3885 3886 for_each_online_cpu(cpu) { 3887 int err; 3888 3889 err = pktgen_create_thread(cpu); 3890 if (err) 3891 pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n", 3892 cpu, err); 3893 } 3894 3895 if (list_empty(&pktgen_threads)) { 3896 pr_err("ERROR: Initialization failed for all threads\n"); 3897 unregister_netdevice_notifier(&pktgen_notifier_block); 3898 remove_proc_entry(PGCTRL, pg_proc_dir); 3899 proc_net_remove(&init_net, PG_PROC_DIR); 3900 return -ENODEV; 3901 } 3902 3903 return 0; 3904 } 3905 3906 static void __exit pg_cleanup(void) 3907 { 3908 struct pktgen_thread *t; 3909 struct list_head *q, *n; 3910 wait_queue_head_t queue; 3911 init_waitqueue_head(&queue); 3912 3913 /* Stop all interfaces & threads */ 3914 3915 list_for_each_safe(q, n, &pktgen_threads) { 3916 t = list_entry(q, struct pktgen_thread, th_list); 3917 kthread_stop(t->tsk); 3918 kfree(t); 3919 } 3920 3921 /* Un-register us from receiving netdevice events */ 3922 unregister_netdevice_notifier(&pktgen_notifier_block); 3923 3924 /* Clean up proc file system */ 3925 remove_proc_entry(PGCTRL, pg_proc_dir); 3926 proc_net_remove(&init_net, PG_PROC_DIR); 3927 } 3928 3929 module_init(pg_init); 3930 module_exit(pg_cleanup); 3931 3932 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); 3933 MODULE_DESCRIPTION("Packet Generator tool"); 3934 MODULE_LICENSE("GPL"); 3935 MODULE_VERSION(VERSION); 3936 module_param(pg_count_d, int, 0); 3937 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); 3938 module_param(pg_delay_d, int, 0); 3939 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); 3940 module_param(pg_clone_skb_d, int, 0); 3941 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); 3942 module_param(debug, int, 0); 3943 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); 3944