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 int value; 733 char c; 734 *num <<= 4; 735 if (get_user(c, &user_buffer[i])) 736 return -EFAULT; 737 value = hex_to_bin(c); 738 if (value >= 0) 739 *num |= value; 740 else 741 break; 742 } 743 return i; 744 } 745 746 static int count_trail_chars(const char __user * user_buffer, 747 unsigned int maxlen) 748 { 749 int i; 750 751 for (i = 0; i < maxlen; i++) { 752 char c; 753 if (get_user(c, &user_buffer[i])) 754 return -EFAULT; 755 switch (c) { 756 case '\"': 757 case '\n': 758 case '\r': 759 case '\t': 760 case ' ': 761 case '=': 762 break; 763 default: 764 goto done; 765 } 766 } 767 done: 768 return i; 769 } 770 771 static unsigned long num_arg(const char __user * user_buffer, 772 unsigned long maxlen, unsigned long *num) 773 { 774 int i; 775 *num = 0; 776 777 for (i = 0; i < maxlen; i++) { 778 char c; 779 if (get_user(c, &user_buffer[i])) 780 return -EFAULT; 781 if ((c >= '0') && (c <= '9')) { 782 *num *= 10; 783 *num += c - '0'; 784 } else 785 break; 786 } 787 return i; 788 } 789 790 static int strn_len(const char __user * user_buffer, unsigned int maxlen) 791 { 792 int i; 793 794 for (i = 0; i < maxlen; i++) { 795 char c; 796 if (get_user(c, &user_buffer[i])) 797 return -EFAULT; 798 switch (c) { 799 case '\"': 800 case '\n': 801 case '\r': 802 case '\t': 803 case ' ': 804 goto done_str; 805 break; 806 default: 807 break; 808 } 809 } 810 done_str: 811 return i; 812 } 813 814 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) 815 { 816 unsigned n = 0; 817 char c; 818 ssize_t i = 0; 819 int len; 820 821 pkt_dev->nr_labels = 0; 822 do { 823 __u32 tmp; 824 len = hex32_arg(&buffer[i], 8, &tmp); 825 if (len <= 0) 826 return len; 827 pkt_dev->labels[n] = htonl(tmp); 828 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 829 pkt_dev->flags |= F_MPLS_RND; 830 i += len; 831 if (get_user(c, &buffer[i])) 832 return -EFAULT; 833 i++; 834 n++; 835 if (n >= MAX_MPLS_LABELS) 836 return -E2BIG; 837 } while (c == ','); 838 839 pkt_dev->nr_labels = n; 840 return i; 841 } 842 843 static ssize_t pktgen_if_write(struct file *file, 844 const char __user * user_buffer, size_t count, 845 loff_t * offset) 846 { 847 struct seq_file *seq = file->private_data; 848 struct pktgen_dev *pkt_dev = seq->private; 849 int i, max, len; 850 char name[16], valstr[32]; 851 unsigned long value = 0; 852 char *pg_result = NULL; 853 int tmp = 0; 854 char buf[128]; 855 856 pg_result = &(pkt_dev->result[0]); 857 858 if (count < 1) { 859 pr_warning("wrong command format\n"); 860 return -EINVAL; 861 } 862 863 max = count; 864 tmp = count_trail_chars(user_buffer, max); 865 if (tmp < 0) { 866 pr_warning("illegal format\n"); 867 return tmp; 868 } 869 i = tmp; 870 871 /* Read variable name */ 872 873 len = strn_len(&user_buffer[i], sizeof(name) - 1); 874 if (len < 0) 875 return len; 876 877 memset(name, 0, sizeof(name)); 878 if (copy_from_user(name, &user_buffer[i], len)) 879 return -EFAULT; 880 i += len; 881 882 max = count - i; 883 len = count_trail_chars(&user_buffer[i], max); 884 if (len < 0) 885 return len; 886 887 i += len; 888 889 if (debug) { 890 size_t copy = min_t(size_t, count, 1023); 891 char tb[copy + 1]; 892 if (copy_from_user(tb, user_buffer, copy)) 893 return -EFAULT; 894 tb[copy] = 0; 895 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name, 896 (unsigned long)count, tb); 897 } 898 899 if (!strcmp(name, "min_pkt_size")) { 900 len = num_arg(&user_buffer[i], 10, &value); 901 if (len < 0) 902 return len; 903 904 i += len; 905 if (value < 14 + 20 + 8) 906 value = 14 + 20 + 8; 907 if (value != pkt_dev->min_pkt_size) { 908 pkt_dev->min_pkt_size = value; 909 pkt_dev->cur_pkt_size = value; 910 } 911 sprintf(pg_result, "OK: min_pkt_size=%u", 912 pkt_dev->min_pkt_size); 913 return count; 914 } 915 916 if (!strcmp(name, "max_pkt_size")) { 917 len = num_arg(&user_buffer[i], 10, &value); 918 if (len < 0) 919 return len; 920 921 i += len; 922 if (value < 14 + 20 + 8) 923 value = 14 + 20 + 8; 924 if (value != pkt_dev->max_pkt_size) { 925 pkt_dev->max_pkt_size = value; 926 pkt_dev->cur_pkt_size = value; 927 } 928 sprintf(pg_result, "OK: max_pkt_size=%u", 929 pkt_dev->max_pkt_size); 930 return count; 931 } 932 933 /* Shortcut for min = max */ 934 935 if (!strcmp(name, "pkt_size")) { 936 len = num_arg(&user_buffer[i], 10, &value); 937 if (len < 0) 938 return len; 939 940 i += len; 941 if (value < 14 + 20 + 8) 942 value = 14 + 20 + 8; 943 if (value != pkt_dev->min_pkt_size) { 944 pkt_dev->min_pkt_size = value; 945 pkt_dev->max_pkt_size = value; 946 pkt_dev->cur_pkt_size = value; 947 } 948 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 949 return count; 950 } 951 952 if (!strcmp(name, "debug")) { 953 len = num_arg(&user_buffer[i], 10, &value); 954 if (len < 0) 955 return len; 956 957 i += len; 958 debug = value; 959 sprintf(pg_result, "OK: debug=%u", debug); 960 return count; 961 } 962 963 if (!strcmp(name, "frags")) { 964 len = num_arg(&user_buffer[i], 10, &value); 965 if (len < 0) 966 return len; 967 968 i += len; 969 pkt_dev->nfrags = value; 970 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 971 return count; 972 } 973 if (!strcmp(name, "delay")) { 974 len = num_arg(&user_buffer[i], 10, &value); 975 if (len < 0) 976 return len; 977 978 i += len; 979 if (value == 0x7FFFFFFF) 980 pkt_dev->delay = ULLONG_MAX; 981 else 982 pkt_dev->delay = (u64)value; 983 984 sprintf(pg_result, "OK: delay=%llu", 985 (unsigned long long) pkt_dev->delay); 986 return count; 987 } 988 if (!strcmp(name, "rate")) { 989 len = num_arg(&user_buffer[i], 10, &value); 990 if (len < 0) 991 return len; 992 993 i += len; 994 if (!value) 995 return len; 996 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value; 997 if (debug) 998 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 999 1000 sprintf(pg_result, "OK: rate=%lu", value); 1001 return count; 1002 } 1003 if (!strcmp(name, "ratep")) { 1004 len = num_arg(&user_buffer[i], 10, &value); 1005 if (len < 0) 1006 return len; 1007 1008 i += len; 1009 if (!value) 1010 return len; 1011 pkt_dev->delay = NSEC_PER_SEC/value; 1012 if (debug) 1013 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 1014 1015 sprintf(pg_result, "OK: rate=%lu", value); 1016 return count; 1017 } 1018 if (!strcmp(name, "udp_src_min")) { 1019 len = num_arg(&user_buffer[i], 10, &value); 1020 if (len < 0) 1021 return len; 1022 1023 i += len; 1024 if (value != pkt_dev->udp_src_min) { 1025 pkt_dev->udp_src_min = value; 1026 pkt_dev->cur_udp_src = value; 1027 } 1028 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 1029 return count; 1030 } 1031 if (!strcmp(name, "udp_dst_min")) { 1032 len = num_arg(&user_buffer[i], 10, &value); 1033 if (len < 0) 1034 return len; 1035 1036 i += len; 1037 if (value != pkt_dev->udp_dst_min) { 1038 pkt_dev->udp_dst_min = value; 1039 pkt_dev->cur_udp_dst = value; 1040 } 1041 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 1042 return count; 1043 } 1044 if (!strcmp(name, "udp_src_max")) { 1045 len = num_arg(&user_buffer[i], 10, &value); 1046 if (len < 0) 1047 return len; 1048 1049 i += len; 1050 if (value != pkt_dev->udp_src_max) { 1051 pkt_dev->udp_src_max = value; 1052 pkt_dev->cur_udp_src = value; 1053 } 1054 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 1055 return count; 1056 } 1057 if (!strcmp(name, "udp_dst_max")) { 1058 len = num_arg(&user_buffer[i], 10, &value); 1059 if (len < 0) 1060 return len; 1061 1062 i += len; 1063 if (value != pkt_dev->udp_dst_max) { 1064 pkt_dev->udp_dst_max = value; 1065 pkt_dev->cur_udp_dst = value; 1066 } 1067 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1068 return count; 1069 } 1070 if (!strcmp(name, "clone_skb")) { 1071 len = num_arg(&user_buffer[i], 10, &value); 1072 if (len < 0) 1073 return len; 1074 1075 i += len; 1076 pkt_dev->clone_skb = value; 1077 1078 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1079 return count; 1080 } 1081 if (!strcmp(name, "count")) { 1082 len = num_arg(&user_buffer[i], 10, &value); 1083 if (len < 0) 1084 return len; 1085 1086 i += len; 1087 pkt_dev->count = value; 1088 sprintf(pg_result, "OK: count=%llu", 1089 (unsigned long long)pkt_dev->count); 1090 return count; 1091 } 1092 if (!strcmp(name, "src_mac_count")) { 1093 len = num_arg(&user_buffer[i], 10, &value); 1094 if (len < 0) 1095 return len; 1096 1097 i += len; 1098 if (pkt_dev->src_mac_count != value) { 1099 pkt_dev->src_mac_count = value; 1100 pkt_dev->cur_src_mac_offset = 0; 1101 } 1102 sprintf(pg_result, "OK: src_mac_count=%d", 1103 pkt_dev->src_mac_count); 1104 return count; 1105 } 1106 if (!strcmp(name, "dst_mac_count")) { 1107 len = num_arg(&user_buffer[i], 10, &value); 1108 if (len < 0) 1109 return len; 1110 1111 i += len; 1112 if (pkt_dev->dst_mac_count != value) { 1113 pkt_dev->dst_mac_count = value; 1114 pkt_dev->cur_dst_mac_offset = 0; 1115 } 1116 sprintf(pg_result, "OK: dst_mac_count=%d", 1117 pkt_dev->dst_mac_count); 1118 return count; 1119 } 1120 if (!strcmp(name, "node")) { 1121 len = num_arg(&user_buffer[i], 10, &value); 1122 if (len < 0) 1123 return len; 1124 1125 i += len; 1126 1127 if (node_possible(value)) { 1128 pkt_dev->node = value; 1129 sprintf(pg_result, "OK: node=%d", pkt_dev->node); 1130 } 1131 else 1132 sprintf(pg_result, "ERROR: node not possible"); 1133 return count; 1134 } 1135 if (!strcmp(name, "flag")) { 1136 char f[32]; 1137 memset(f, 0, 32); 1138 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1139 if (len < 0) 1140 return len; 1141 1142 if (copy_from_user(f, &user_buffer[i], len)) 1143 return -EFAULT; 1144 i += len; 1145 if (strcmp(f, "IPSRC_RND") == 0) 1146 pkt_dev->flags |= F_IPSRC_RND; 1147 1148 else if (strcmp(f, "!IPSRC_RND") == 0) 1149 pkt_dev->flags &= ~F_IPSRC_RND; 1150 1151 else if (strcmp(f, "TXSIZE_RND") == 0) 1152 pkt_dev->flags |= F_TXSIZE_RND; 1153 1154 else if (strcmp(f, "!TXSIZE_RND") == 0) 1155 pkt_dev->flags &= ~F_TXSIZE_RND; 1156 1157 else if (strcmp(f, "IPDST_RND") == 0) 1158 pkt_dev->flags |= F_IPDST_RND; 1159 1160 else if (strcmp(f, "!IPDST_RND") == 0) 1161 pkt_dev->flags &= ~F_IPDST_RND; 1162 1163 else if (strcmp(f, "UDPSRC_RND") == 0) 1164 pkt_dev->flags |= F_UDPSRC_RND; 1165 1166 else if (strcmp(f, "!UDPSRC_RND") == 0) 1167 pkt_dev->flags &= ~F_UDPSRC_RND; 1168 1169 else if (strcmp(f, "UDPDST_RND") == 0) 1170 pkt_dev->flags |= F_UDPDST_RND; 1171 1172 else if (strcmp(f, "!UDPDST_RND") == 0) 1173 pkt_dev->flags &= ~F_UDPDST_RND; 1174 1175 else if (strcmp(f, "MACSRC_RND") == 0) 1176 pkt_dev->flags |= F_MACSRC_RND; 1177 1178 else if (strcmp(f, "!MACSRC_RND") == 0) 1179 pkt_dev->flags &= ~F_MACSRC_RND; 1180 1181 else if (strcmp(f, "MACDST_RND") == 0) 1182 pkt_dev->flags |= F_MACDST_RND; 1183 1184 else if (strcmp(f, "!MACDST_RND") == 0) 1185 pkt_dev->flags &= ~F_MACDST_RND; 1186 1187 else if (strcmp(f, "MPLS_RND") == 0) 1188 pkt_dev->flags |= F_MPLS_RND; 1189 1190 else if (strcmp(f, "!MPLS_RND") == 0) 1191 pkt_dev->flags &= ~F_MPLS_RND; 1192 1193 else if (strcmp(f, "VID_RND") == 0) 1194 pkt_dev->flags |= F_VID_RND; 1195 1196 else if (strcmp(f, "!VID_RND") == 0) 1197 pkt_dev->flags &= ~F_VID_RND; 1198 1199 else if (strcmp(f, "SVID_RND") == 0) 1200 pkt_dev->flags |= F_SVID_RND; 1201 1202 else if (strcmp(f, "!SVID_RND") == 0) 1203 pkt_dev->flags &= ~F_SVID_RND; 1204 1205 else if (strcmp(f, "FLOW_SEQ") == 0) 1206 pkt_dev->flags |= F_FLOW_SEQ; 1207 1208 else if (strcmp(f, "QUEUE_MAP_RND") == 0) 1209 pkt_dev->flags |= F_QUEUE_MAP_RND; 1210 1211 else if (strcmp(f, "!QUEUE_MAP_RND") == 0) 1212 pkt_dev->flags &= ~F_QUEUE_MAP_RND; 1213 1214 else if (strcmp(f, "QUEUE_MAP_CPU") == 0) 1215 pkt_dev->flags |= F_QUEUE_MAP_CPU; 1216 1217 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0) 1218 pkt_dev->flags &= ~F_QUEUE_MAP_CPU; 1219 #ifdef CONFIG_XFRM 1220 else if (strcmp(f, "IPSEC") == 0) 1221 pkt_dev->flags |= F_IPSEC_ON; 1222 #endif 1223 1224 else if (strcmp(f, "!IPV6") == 0) 1225 pkt_dev->flags &= ~F_IPV6; 1226 1227 else if (strcmp(f, "NODE_ALLOC") == 0) 1228 pkt_dev->flags |= F_NODE; 1229 1230 else if (strcmp(f, "!NODE_ALLOC") == 0) 1231 pkt_dev->flags &= ~F_NODE; 1232 1233 else { 1234 sprintf(pg_result, 1235 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1236 f, 1237 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1238 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n"); 1239 return count; 1240 } 1241 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1242 return count; 1243 } 1244 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1245 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1246 if (len < 0) 1247 return len; 1248 1249 if (copy_from_user(buf, &user_buffer[i], len)) 1250 return -EFAULT; 1251 buf[len] = 0; 1252 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1253 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1254 strncpy(pkt_dev->dst_min, buf, len); 1255 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1256 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1257 } 1258 if (debug) 1259 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n", 1260 pkt_dev->dst_min); 1261 i += len; 1262 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1263 return count; 1264 } 1265 if (!strcmp(name, "dst_max")) { 1266 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1267 if (len < 0) 1268 return len; 1269 1270 1271 if (copy_from_user(buf, &user_buffer[i], len)) 1272 return -EFAULT; 1273 1274 buf[len] = 0; 1275 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1276 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1277 strncpy(pkt_dev->dst_max, buf, len); 1278 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1279 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1280 } 1281 if (debug) 1282 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n", 1283 pkt_dev->dst_max); 1284 i += len; 1285 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1286 return count; 1287 } 1288 if (!strcmp(name, "dst6")) { 1289 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1290 if (len < 0) 1291 return len; 1292 1293 pkt_dev->flags |= F_IPV6; 1294 1295 if (copy_from_user(buf, &user_buffer[i], len)) 1296 return -EFAULT; 1297 buf[len] = 0; 1298 1299 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1300 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1301 1302 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr); 1303 1304 if (debug) 1305 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf); 1306 1307 i += len; 1308 sprintf(pg_result, "OK: dst6=%s", buf); 1309 return count; 1310 } 1311 if (!strcmp(name, "dst6_min")) { 1312 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1313 if (len < 0) 1314 return len; 1315 1316 pkt_dev->flags |= F_IPV6; 1317 1318 if (copy_from_user(buf, &user_buffer[i], len)) 1319 return -EFAULT; 1320 buf[len] = 0; 1321 1322 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1323 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1324 1325 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, 1326 &pkt_dev->min_in6_daddr); 1327 if (debug) 1328 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf); 1329 1330 i += len; 1331 sprintf(pg_result, "OK: dst6_min=%s", buf); 1332 return count; 1333 } 1334 if (!strcmp(name, "dst6_max")) { 1335 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1336 if (len < 0) 1337 return len; 1338 1339 pkt_dev->flags |= F_IPV6; 1340 1341 if (copy_from_user(buf, &user_buffer[i], len)) 1342 return -EFAULT; 1343 buf[len] = 0; 1344 1345 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1346 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1347 1348 if (debug) 1349 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf); 1350 1351 i += len; 1352 sprintf(pg_result, "OK: dst6_max=%s", buf); 1353 return count; 1354 } 1355 if (!strcmp(name, "src6")) { 1356 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1357 if (len < 0) 1358 return len; 1359 1360 pkt_dev->flags |= F_IPV6; 1361 1362 if (copy_from_user(buf, &user_buffer[i], len)) 1363 return -EFAULT; 1364 buf[len] = 0; 1365 1366 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1367 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1368 1369 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr); 1370 1371 if (debug) 1372 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf); 1373 1374 i += len; 1375 sprintf(pg_result, "OK: src6=%s", buf); 1376 return count; 1377 } 1378 if (!strcmp(name, "src_min")) { 1379 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1380 if (len < 0) 1381 return len; 1382 1383 if (copy_from_user(buf, &user_buffer[i], len)) 1384 return -EFAULT; 1385 buf[len] = 0; 1386 if (strcmp(buf, pkt_dev->src_min) != 0) { 1387 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1388 strncpy(pkt_dev->src_min, buf, len); 1389 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1390 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1391 } 1392 if (debug) 1393 printk(KERN_DEBUG "pktgen: src_min set to: %s\n", 1394 pkt_dev->src_min); 1395 i += len; 1396 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1397 return count; 1398 } 1399 if (!strcmp(name, "src_max")) { 1400 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1401 if (len < 0) 1402 return len; 1403 1404 if (copy_from_user(buf, &user_buffer[i], len)) 1405 return -EFAULT; 1406 buf[len] = 0; 1407 if (strcmp(buf, pkt_dev->src_max) != 0) { 1408 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1409 strncpy(pkt_dev->src_max, buf, len); 1410 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1411 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1412 } 1413 if (debug) 1414 printk(KERN_DEBUG "pktgen: src_max set to: %s\n", 1415 pkt_dev->src_max); 1416 i += len; 1417 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1418 return count; 1419 } 1420 if (!strcmp(name, "dst_mac")) { 1421 char *v = valstr; 1422 unsigned char old_dmac[ETH_ALEN]; 1423 unsigned char *m = pkt_dev->dst_mac; 1424 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN); 1425 1426 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1427 if (len < 0) 1428 return len; 1429 1430 memset(valstr, 0, sizeof(valstr)); 1431 if (copy_from_user(valstr, &user_buffer[i], len)) 1432 return -EFAULT; 1433 i += len; 1434 1435 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) { 1436 int value; 1437 1438 value = hex_to_bin(*v); 1439 if (value >= 0) 1440 *m = *m * 16 + value; 1441 1442 if (*v == ':') { 1443 m++; 1444 *m = 0; 1445 } 1446 } 1447 1448 /* Set up Dest MAC */ 1449 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac)) 1450 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 1451 1452 sprintf(pg_result, "OK: dstmac"); 1453 return count; 1454 } 1455 if (!strcmp(name, "src_mac")) { 1456 char *v = valstr; 1457 unsigned char old_smac[ETH_ALEN]; 1458 unsigned char *m = pkt_dev->src_mac; 1459 1460 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN); 1461 1462 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1463 if (len < 0) 1464 return len; 1465 1466 memset(valstr, 0, sizeof(valstr)); 1467 if (copy_from_user(valstr, &user_buffer[i], len)) 1468 return -EFAULT; 1469 i += len; 1470 1471 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) { 1472 int value; 1473 1474 value = hex_to_bin(*v); 1475 if (value >= 0) 1476 *m = *m * 16 + value; 1477 1478 if (*v == ':') { 1479 m++; 1480 *m = 0; 1481 } 1482 } 1483 1484 /* Set up Src MAC */ 1485 if (compare_ether_addr(old_smac, pkt_dev->src_mac)) 1486 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN); 1487 1488 sprintf(pg_result, "OK: srcmac"); 1489 return count; 1490 } 1491 1492 if (!strcmp(name, "clear_counters")) { 1493 pktgen_clear_counters(pkt_dev); 1494 sprintf(pg_result, "OK: Clearing counters.\n"); 1495 return count; 1496 } 1497 1498 if (!strcmp(name, "flows")) { 1499 len = num_arg(&user_buffer[i], 10, &value); 1500 if (len < 0) 1501 return len; 1502 1503 i += len; 1504 if (value > MAX_CFLOWS) 1505 value = MAX_CFLOWS; 1506 1507 pkt_dev->cflows = value; 1508 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1509 return count; 1510 } 1511 1512 if (!strcmp(name, "flowlen")) { 1513 len = num_arg(&user_buffer[i], 10, &value); 1514 if (len < 0) 1515 return len; 1516 1517 i += len; 1518 pkt_dev->lflow = value; 1519 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1520 return count; 1521 } 1522 1523 if (!strcmp(name, "queue_map_min")) { 1524 len = num_arg(&user_buffer[i], 5, &value); 1525 if (len < 0) 1526 return len; 1527 1528 i += len; 1529 pkt_dev->queue_map_min = value; 1530 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1531 return count; 1532 } 1533 1534 if (!strcmp(name, "queue_map_max")) { 1535 len = num_arg(&user_buffer[i], 5, &value); 1536 if (len < 0) 1537 return len; 1538 1539 i += len; 1540 pkt_dev->queue_map_max = value; 1541 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1542 return count; 1543 } 1544 1545 if (!strcmp(name, "mpls")) { 1546 unsigned n, cnt; 1547 1548 len = get_labels(&user_buffer[i], pkt_dev); 1549 if (len < 0) 1550 return len; 1551 i += len; 1552 cnt = sprintf(pg_result, "OK: mpls="); 1553 for (n = 0; n < pkt_dev->nr_labels; n++) 1554 cnt += sprintf(pg_result + cnt, 1555 "%08x%s", ntohl(pkt_dev->labels[n]), 1556 n == pkt_dev->nr_labels-1 ? "" : ","); 1557 1558 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1559 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1560 pkt_dev->svlan_id = 0xffff; 1561 1562 if (debug) 1563 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n"); 1564 } 1565 return count; 1566 } 1567 1568 if (!strcmp(name, "vlan_id")) { 1569 len = num_arg(&user_buffer[i], 4, &value); 1570 if (len < 0) 1571 return len; 1572 1573 i += len; 1574 if (value <= 4095) { 1575 pkt_dev->vlan_id = value; /* turn on VLAN */ 1576 1577 if (debug) 1578 printk(KERN_DEBUG "pktgen: VLAN turned on\n"); 1579 1580 if (debug && pkt_dev->nr_labels) 1581 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1582 1583 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1584 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1585 } else { 1586 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1587 pkt_dev->svlan_id = 0xffff; 1588 1589 if (debug) 1590 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1591 } 1592 return count; 1593 } 1594 1595 if (!strcmp(name, "vlan_p")) { 1596 len = num_arg(&user_buffer[i], 1, &value); 1597 if (len < 0) 1598 return len; 1599 1600 i += len; 1601 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1602 pkt_dev->vlan_p = value; 1603 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1604 } else { 1605 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1606 } 1607 return count; 1608 } 1609 1610 if (!strcmp(name, "vlan_cfi")) { 1611 len = num_arg(&user_buffer[i], 1, &value); 1612 if (len < 0) 1613 return len; 1614 1615 i += len; 1616 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1617 pkt_dev->vlan_cfi = value; 1618 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1619 } else { 1620 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1621 } 1622 return count; 1623 } 1624 1625 if (!strcmp(name, "svlan_id")) { 1626 len = num_arg(&user_buffer[i], 4, &value); 1627 if (len < 0) 1628 return len; 1629 1630 i += len; 1631 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1632 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1633 1634 if (debug) 1635 printk(KERN_DEBUG "pktgen: SVLAN turned on\n"); 1636 1637 if (debug && pkt_dev->nr_labels) 1638 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1639 1640 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1641 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1642 } else { 1643 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1644 pkt_dev->svlan_id = 0xffff; 1645 1646 if (debug) 1647 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1648 } 1649 return count; 1650 } 1651 1652 if (!strcmp(name, "svlan_p")) { 1653 len = num_arg(&user_buffer[i], 1, &value); 1654 if (len < 0) 1655 return len; 1656 1657 i += len; 1658 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1659 pkt_dev->svlan_p = value; 1660 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1661 } else { 1662 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1663 } 1664 return count; 1665 } 1666 1667 if (!strcmp(name, "svlan_cfi")) { 1668 len = num_arg(&user_buffer[i], 1, &value); 1669 if (len < 0) 1670 return len; 1671 1672 i += len; 1673 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1674 pkt_dev->svlan_cfi = value; 1675 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1676 } else { 1677 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1678 } 1679 return count; 1680 } 1681 1682 if (!strcmp(name, "tos")) { 1683 __u32 tmp_value = 0; 1684 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1685 if (len < 0) 1686 return len; 1687 1688 i += len; 1689 if (len == 2) { 1690 pkt_dev->tos = tmp_value; 1691 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1692 } else { 1693 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1694 } 1695 return count; 1696 } 1697 1698 if (!strcmp(name, "traffic_class")) { 1699 __u32 tmp_value = 0; 1700 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1701 if (len < 0) 1702 return len; 1703 1704 i += len; 1705 if (len == 2) { 1706 pkt_dev->traffic_class = tmp_value; 1707 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1708 } else { 1709 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1710 } 1711 return count; 1712 } 1713 1714 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1715 return -EINVAL; 1716 } 1717 1718 static int pktgen_if_open(struct inode *inode, struct file *file) 1719 { 1720 return single_open(file, pktgen_if_show, PDE(inode)->data); 1721 } 1722 1723 static const struct file_operations pktgen_if_fops = { 1724 .owner = THIS_MODULE, 1725 .open = pktgen_if_open, 1726 .read = seq_read, 1727 .llseek = seq_lseek, 1728 .write = pktgen_if_write, 1729 .release = single_release, 1730 }; 1731 1732 static int pktgen_thread_show(struct seq_file *seq, void *v) 1733 { 1734 struct pktgen_thread *t = seq->private; 1735 const struct pktgen_dev *pkt_dev; 1736 1737 BUG_ON(!t); 1738 1739 seq_printf(seq, "Running: "); 1740 1741 if_lock(t); 1742 list_for_each_entry(pkt_dev, &t->if_list, list) 1743 if (pkt_dev->running) 1744 seq_printf(seq, "%s ", pkt_dev->odevname); 1745 1746 seq_printf(seq, "\nStopped: "); 1747 1748 list_for_each_entry(pkt_dev, &t->if_list, list) 1749 if (!pkt_dev->running) 1750 seq_printf(seq, "%s ", pkt_dev->odevname); 1751 1752 if (t->result[0]) 1753 seq_printf(seq, "\nResult: %s\n", t->result); 1754 else 1755 seq_printf(seq, "\nResult: NA\n"); 1756 1757 if_unlock(t); 1758 1759 return 0; 1760 } 1761 1762 static ssize_t pktgen_thread_write(struct file *file, 1763 const char __user * user_buffer, 1764 size_t count, loff_t * offset) 1765 { 1766 struct seq_file *seq = file->private_data; 1767 struct pktgen_thread *t = seq->private; 1768 int i, max, len, ret; 1769 char name[40]; 1770 char *pg_result; 1771 1772 if (count < 1) { 1773 // sprintf(pg_result, "Wrong command format"); 1774 return -EINVAL; 1775 } 1776 1777 max = count; 1778 len = count_trail_chars(user_buffer, max); 1779 if (len < 0) 1780 return len; 1781 1782 i = len; 1783 1784 /* Read variable name */ 1785 1786 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1787 if (len < 0) 1788 return len; 1789 1790 memset(name, 0, sizeof(name)); 1791 if (copy_from_user(name, &user_buffer[i], len)) 1792 return -EFAULT; 1793 i += len; 1794 1795 max = count - i; 1796 len = count_trail_chars(&user_buffer[i], max); 1797 if (len < 0) 1798 return len; 1799 1800 i += len; 1801 1802 if (debug) 1803 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n", 1804 name, (unsigned long)count); 1805 1806 if (!t) { 1807 pr_err("ERROR: No thread\n"); 1808 ret = -EINVAL; 1809 goto out; 1810 } 1811 1812 pg_result = &(t->result[0]); 1813 1814 if (!strcmp(name, "add_device")) { 1815 char f[32]; 1816 memset(f, 0, 32); 1817 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1818 if (len < 0) { 1819 ret = len; 1820 goto out; 1821 } 1822 if (copy_from_user(f, &user_buffer[i], len)) 1823 return -EFAULT; 1824 i += len; 1825 mutex_lock(&pktgen_thread_lock); 1826 pktgen_add_device(t, f); 1827 mutex_unlock(&pktgen_thread_lock); 1828 ret = count; 1829 sprintf(pg_result, "OK: add_device=%s", f); 1830 goto out; 1831 } 1832 1833 if (!strcmp(name, "rem_device_all")) { 1834 mutex_lock(&pktgen_thread_lock); 1835 t->control |= T_REMDEVALL; 1836 mutex_unlock(&pktgen_thread_lock); 1837 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1838 ret = count; 1839 sprintf(pg_result, "OK: rem_device_all"); 1840 goto out; 1841 } 1842 1843 if (!strcmp(name, "max_before_softirq")) { 1844 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1845 ret = count; 1846 goto out; 1847 } 1848 1849 ret = -EINVAL; 1850 out: 1851 return ret; 1852 } 1853 1854 static int pktgen_thread_open(struct inode *inode, struct file *file) 1855 { 1856 return single_open(file, pktgen_thread_show, PDE(inode)->data); 1857 } 1858 1859 static const struct file_operations pktgen_thread_fops = { 1860 .owner = THIS_MODULE, 1861 .open = pktgen_thread_open, 1862 .read = seq_read, 1863 .llseek = seq_lseek, 1864 .write = pktgen_thread_write, 1865 .release = single_release, 1866 }; 1867 1868 /* Think find or remove for NN */ 1869 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove) 1870 { 1871 struct pktgen_thread *t; 1872 struct pktgen_dev *pkt_dev = NULL; 1873 bool exact = (remove == FIND); 1874 1875 list_for_each_entry(t, &pktgen_threads, th_list) { 1876 pkt_dev = pktgen_find_dev(t, ifname, exact); 1877 if (pkt_dev) { 1878 if (remove) { 1879 if_lock(t); 1880 pkt_dev->removal_mark = 1; 1881 t->control |= T_REMDEV; 1882 if_unlock(t); 1883 } 1884 break; 1885 } 1886 } 1887 return pkt_dev; 1888 } 1889 1890 /* 1891 * mark a device for removal 1892 */ 1893 static void pktgen_mark_device(const char *ifname) 1894 { 1895 struct pktgen_dev *pkt_dev = NULL; 1896 const int max_tries = 10, msec_per_try = 125; 1897 int i = 0; 1898 1899 mutex_lock(&pktgen_thread_lock); 1900 pr_debug("%s: marking %s for removal\n", __func__, ifname); 1901 1902 while (1) { 1903 1904 pkt_dev = __pktgen_NN_threads(ifname, REMOVE); 1905 if (pkt_dev == NULL) 1906 break; /* success */ 1907 1908 mutex_unlock(&pktgen_thread_lock); 1909 pr_debug("%s: waiting for %s to disappear....\n", 1910 __func__, ifname); 1911 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1912 mutex_lock(&pktgen_thread_lock); 1913 1914 if (++i >= max_tries) { 1915 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n", 1916 __func__, msec_per_try * i, ifname); 1917 break; 1918 } 1919 1920 } 1921 1922 mutex_unlock(&pktgen_thread_lock); 1923 } 1924 1925 static void pktgen_change_name(struct net_device *dev) 1926 { 1927 struct pktgen_thread *t; 1928 1929 list_for_each_entry(t, &pktgen_threads, th_list) { 1930 struct pktgen_dev *pkt_dev; 1931 1932 list_for_each_entry(pkt_dev, &t->if_list, list) { 1933 if (pkt_dev->odev != dev) 1934 continue; 1935 1936 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 1937 1938 pkt_dev->entry = proc_create_data(dev->name, 0600, 1939 pg_proc_dir, 1940 &pktgen_if_fops, 1941 pkt_dev); 1942 if (!pkt_dev->entry) 1943 pr_err("can't move proc entry for '%s'\n", 1944 dev->name); 1945 break; 1946 } 1947 } 1948 } 1949 1950 static int pktgen_device_event(struct notifier_block *unused, 1951 unsigned long event, void *ptr) 1952 { 1953 struct net_device *dev = ptr; 1954 1955 if (!net_eq(dev_net(dev), &init_net)) 1956 return NOTIFY_DONE; 1957 1958 /* It is OK that we do not hold the group lock right now, 1959 * as we run under the RTNL lock. 1960 */ 1961 1962 switch (event) { 1963 case NETDEV_CHANGENAME: 1964 pktgen_change_name(dev); 1965 break; 1966 1967 case NETDEV_UNREGISTER: 1968 pktgen_mark_device(dev->name); 1969 break; 1970 } 1971 1972 return NOTIFY_DONE; 1973 } 1974 1975 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev, 1976 const char *ifname) 1977 { 1978 char b[IFNAMSIZ+5]; 1979 int i; 1980 1981 for (i = 0; ifname[i] != '@'; i++) { 1982 if (i == IFNAMSIZ) 1983 break; 1984 1985 b[i] = ifname[i]; 1986 } 1987 b[i] = 0; 1988 1989 return dev_get_by_name(&init_net, b); 1990 } 1991 1992 1993 /* Associate pktgen_dev with a device. */ 1994 1995 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname) 1996 { 1997 struct net_device *odev; 1998 int err; 1999 2000 /* Clean old setups */ 2001 if (pkt_dev->odev) { 2002 dev_put(pkt_dev->odev); 2003 pkt_dev->odev = NULL; 2004 } 2005 2006 odev = pktgen_dev_get_by_name(pkt_dev, ifname); 2007 if (!odev) { 2008 pr_err("no such netdevice: \"%s\"\n", ifname); 2009 return -ENODEV; 2010 } 2011 2012 if (odev->type != ARPHRD_ETHER) { 2013 pr_err("not an ethernet device: \"%s\"\n", ifname); 2014 err = -EINVAL; 2015 } else if (!netif_running(odev)) { 2016 pr_err("device is down: \"%s\"\n", ifname); 2017 err = -ENETDOWN; 2018 } else { 2019 pkt_dev->odev = odev; 2020 return 0; 2021 } 2022 2023 dev_put(odev); 2024 return err; 2025 } 2026 2027 /* Read pkt_dev from the interface and set up internal pktgen_dev 2028 * structure to have the right information to create/send packets 2029 */ 2030 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 2031 { 2032 int ntxq; 2033 2034 if (!pkt_dev->odev) { 2035 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n"); 2036 sprintf(pkt_dev->result, 2037 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 2038 return; 2039 } 2040 2041 /* make sure that we don't pick a non-existing transmit queue */ 2042 ntxq = pkt_dev->odev->real_num_tx_queues; 2043 2044 if (ntxq <= pkt_dev->queue_map_min) { 2045 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2046 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, 2047 pkt_dev->odevname); 2048 pkt_dev->queue_map_min = ntxq - 1; 2049 } 2050 if (pkt_dev->queue_map_max >= ntxq) { 2051 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2052 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, 2053 pkt_dev->odevname); 2054 pkt_dev->queue_map_max = ntxq - 1; 2055 } 2056 2057 /* Default to the interface's mac if not explicitly set. */ 2058 2059 if (is_zero_ether_addr(pkt_dev->src_mac)) 2060 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN); 2061 2062 /* Set up Dest MAC */ 2063 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 2064 2065 /* Set up pkt size */ 2066 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2067 2068 if (pkt_dev->flags & F_IPV6) { 2069 /* 2070 * Skip this automatic address setting until locks or functions 2071 * gets exported 2072 */ 2073 2074 #ifdef NOTNOW 2075 int i, set = 0, err = 1; 2076 struct inet6_dev *idev; 2077 2078 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2079 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2080 set = 1; 2081 break; 2082 } 2083 2084 if (!set) { 2085 2086 /* 2087 * Use linklevel address if unconfigured. 2088 * 2089 * use ipv6_get_lladdr if/when it's get exported 2090 */ 2091 2092 rcu_read_lock(); 2093 idev = __in6_dev_get(pkt_dev->odev); 2094 if (idev) { 2095 struct inet6_ifaddr *ifp; 2096 2097 read_lock_bh(&idev->lock); 2098 for (ifp = idev->addr_list; ifp; 2099 ifp = ifp->if_next) { 2100 if (ifp->scope == IFA_LINK && 2101 !(ifp->flags & IFA_F_TENTATIVE)) { 2102 ipv6_addr_copy(&pkt_dev-> 2103 cur_in6_saddr, 2104 &ifp->addr); 2105 err = 0; 2106 break; 2107 } 2108 } 2109 read_unlock_bh(&idev->lock); 2110 } 2111 rcu_read_unlock(); 2112 if (err) 2113 pr_err("ERROR: IPv6 link address not available\n"); 2114 } 2115 #endif 2116 } else { 2117 pkt_dev->saddr_min = 0; 2118 pkt_dev->saddr_max = 0; 2119 if (strlen(pkt_dev->src_min) == 0) { 2120 2121 struct in_device *in_dev; 2122 2123 rcu_read_lock(); 2124 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2125 if (in_dev) { 2126 if (in_dev->ifa_list) { 2127 pkt_dev->saddr_min = 2128 in_dev->ifa_list->ifa_address; 2129 pkt_dev->saddr_max = pkt_dev->saddr_min; 2130 } 2131 } 2132 rcu_read_unlock(); 2133 } else { 2134 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2135 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2136 } 2137 2138 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2139 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2140 } 2141 /* Initialize current values. */ 2142 pkt_dev->cur_dst_mac_offset = 0; 2143 pkt_dev->cur_src_mac_offset = 0; 2144 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2145 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2146 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2147 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2148 pkt_dev->nflows = 0; 2149 } 2150 2151 2152 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) 2153 { 2154 ktime_t start_time, end_time; 2155 s64 remaining; 2156 struct hrtimer_sleeper t; 2157 2158 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); 2159 hrtimer_set_expires(&t.timer, spin_until); 2160 2161 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer)); 2162 if (remaining <= 0) { 2163 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2164 return; 2165 } 2166 2167 start_time = ktime_now(); 2168 if (remaining < 100000) 2169 ndelay(remaining); /* really small just spin */ 2170 else { 2171 /* see do_nanosleep */ 2172 hrtimer_init_sleeper(&t, current); 2173 do { 2174 set_current_state(TASK_INTERRUPTIBLE); 2175 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS); 2176 if (!hrtimer_active(&t.timer)) 2177 t.task = NULL; 2178 2179 if (likely(t.task)) 2180 schedule(); 2181 2182 hrtimer_cancel(&t.timer); 2183 } while (t.task && pkt_dev->running && !signal_pending(current)); 2184 __set_current_state(TASK_RUNNING); 2185 } 2186 end_time = ktime_now(); 2187 2188 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); 2189 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2190 } 2191 2192 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2193 { 2194 pkt_dev->pkt_overhead = 0; 2195 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2196 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2197 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2198 } 2199 2200 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) 2201 { 2202 return !!(pkt_dev->flows[flow].flags & F_INIT); 2203 } 2204 2205 static inline int f_pick(struct pktgen_dev *pkt_dev) 2206 { 2207 int flow = pkt_dev->curfl; 2208 2209 if (pkt_dev->flags & F_FLOW_SEQ) { 2210 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2211 /* reset time */ 2212 pkt_dev->flows[flow].count = 0; 2213 pkt_dev->flows[flow].flags = 0; 2214 pkt_dev->curfl += 1; 2215 if (pkt_dev->curfl >= pkt_dev->cflows) 2216 pkt_dev->curfl = 0; /*reset */ 2217 } 2218 } else { 2219 flow = random32() % pkt_dev->cflows; 2220 pkt_dev->curfl = flow; 2221 2222 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2223 pkt_dev->flows[flow].count = 0; 2224 pkt_dev->flows[flow].flags = 0; 2225 } 2226 } 2227 2228 return pkt_dev->curfl; 2229 } 2230 2231 2232 #ifdef CONFIG_XFRM 2233 /* If there was already an IPSEC SA, we keep it as is, else 2234 * we go look for it ... 2235 */ 2236 #define DUMMY_MARK 0 2237 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2238 { 2239 struct xfrm_state *x = pkt_dev->flows[flow].x; 2240 if (!x) { 2241 /*slow path: we dont already have xfrm_state*/ 2242 x = xfrm_stateonly_find(&init_net, DUMMY_MARK, 2243 (xfrm_address_t *)&pkt_dev->cur_daddr, 2244 (xfrm_address_t *)&pkt_dev->cur_saddr, 2245 AF_INET, 2246 pkt_dev->ipsmode, 2247 pkt_dev->ipsproto, 0); 2248 if (x) { 2249 pkt_dev->flows[flow].x = x; 2250 set_pkt_overhead(pkt_dev); 2251 pkt_dev->pkt_overhead += x->props.header_len; 2252 } 2253 2254 } 2255 } 2256 #endif 2257 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2258 { 2259 2260 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2261 pkt_dev->cur_queue_map = smp_processor_id(); 2262 2263 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { 2264 __u16 t; 2265 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2266 t = random32() % 2267 (pkt_dev->queue_map_max - 2268 pkt_dev->queue_map_min + 1) 2269 + pkt_dev->queue_map_min; 2270 } else { 2271 t = pkt_dev->cur_queue_map + 1; 2272 if (t > pkt_dev->queue_map_max) 2273 t = pkt_dev->queue_map_min; 2274 } 2275 pkt_dev->cur_queue_map = t; 2276 } 2277 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2278 } 2279 2280 /* Increment/randomize headers according to flags and current values 2281 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2282 */ 2283 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2284 { 2285 __u32 imn; 2286 __u32 imx; 2287 int flow = 0; 2288 2289 if (pkt_dev->cflows) 2290 flow = f_pick(pkt_dev); 2291 2292 /* Deal with source MAC */ 2293 if (pkt_dev->src_mac_count > 1) { 2294 __u32 mc; 2295 __u32 tmp; 2296 2297 if (pkt_dev->flags & F_MACSRC_RND) 2298 mc = random32() % pkt_dev->src_mac_count; 2299 else { 2300 mc = pkt_dev->cur_src_mac_offset++; 2301 if (pkt_dev->cur_src_mac_offset >= 2302 pkt_dev->src_mac_count) 2303 pkt_dev->cur_src_mac_offset = 0; 2304 } 2305 2306 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2307 pkt_dev->hh[11] = tmp; 2308 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2309 pkt_dev->hh[10] = tmp; 2310 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2311 pkt_dev->hh[9] = tmp; 2312 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2313 pkt_dev->hh[8] = tmp; 2314 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2315 pkt_dev->hh[7] = tmp; 2316 } 2317 2318 /* Deal with Destination MAC */ 2319 if (pkt_dev->dst_mac_count > 1) { 2320 __u32 mc; 2321 __u32 tmp; 2322 2323 if (pkt_dev->flags & F_MACDST_RND) 2324 mc = random32() % pkt_dev->dst_mac_count; 2325 2326 else { 2327 mc = pkt_dev->cur_dst_mac_offset++; 2328 if (pkt_dev->cur_dst_mac_offset >= 2329 pkt_dev->dst_mac_count) { 2330 pkt_dev->cur_dst_mac_offset = 0; 2331 } 2332 } 2333 2334 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2335 pkt_dev->hh[5] = tmp; 2336 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2337 pkt_dev->hh[4] = tmp; 2338 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2339 pkt_dev->hh[3] = tmp; 2340 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2341 pkt_dev->hh[2] = tmp; 2342 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2343 pkt_dev->hh[1] = tmp; 2344 } 2345 2346 if (pkt_dev->flags & F_MPLS_RND) { 2347 unsigned i; 2348 for (i = 0; i < pkt_dev->nr_labels; i++) 2349 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2350 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2351 ((__force __be32)random32() & 2352 htonl(0x000fffff)); 2353 } 2354 2355 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2356 pkt_dev->vlan_id = random32() & (4096-1); 2357 } 2358 2359 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2360 pkt_dev->svlan_id = random32() & (4096 - 1); 2361 } 2362 2363 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2364 if (pkt_dev->flags & F_UDPSRC_RND) 2365 pkt_dev->cur_udp_src = random32() % 2366 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2367 + pkt_dev->udp_src_min; 2368 2369 else { 2370 pkt_dev->cur_udp_src++; 2371 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2372 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2373 } 2374 } 2375 2376 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2377 if (pkt_dev->flags & F_UDPDST_RND) { 2378 pkt_dev->cur_udp_dst = random32() % 2379 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2380 + pkt_dev->udp_dst_min; 2381 } else { 2382 pkt_dev->cur_udp_dst++; 2383 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2384 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2385 } 2386 } 2387 2388 if (!(pkt_dev->flags & F_IPV6)) { 2389 2390 imn = ntohl(pkt_dev->saddr_min); 2391 imx = ntohl(pkt_dev->saddr_max); 2392 if (imn < imx) { 2393 __u32 t; 2394 if (pkt_dev->flags & F_IPSRC_RND) 2395 t = random32() % (imx - imn) + imn; 2396 else { 2397 t = ntohl(pkt_dev->cur_saddr); 2398 t++; 2399 if (t > imx) 2400 t = imn; 2401 2402 } 2403 pkt_dev->cur_saddr = htonl(t); 2404 } 2405 2406 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2407 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2408 } else { 2409 imn = ntohl(pkt_dev->daddr_min); 2410 imx = ntohl(pkt_dev->daddr_max); 2411 if (imn < imx) { 2412 __u32 t; 2413 __be32 s; 2414 if (pkt_dev->flags & F_IPDST_RND) { 2415 2416 t = random32() % (imx - imn) + imn; 2417 s = htonl(t); 2418 2419 while (ipv4_is_loopback(s) || 2420 ipv4_is_multicast(s) || 2421 ipv4_is_lbcast(s) || 2422 ipv4_is_zeronet(s) || 2423 ipv4_is_local_multicast(s)) { 2424 t = random32() % (imx - imn) + imn; 2425 s = htonl(t); 2426 } 2427 pkt_dev->cur_daddr = s; 2428 } else { 2429 t = ntohl(pkt_dev->cur_daddr); 2430 t++; 2431 if (t > imx) { 2432 t = imn; 2433 } 2434 pkt_dev->cur_daddr = htonl(t); 2435 } 2436 } 2437 if (pkt_dev->cflows) { 2438 pkt_dev->flows[flow].flags |= F_INIT; 2439 pkt_dev->flows[flow].cur_daddr = 2440 pkt_dev->cur_daddr; 2441 #ifdef CONFIG_XFRM 2442 if (pkt_dev->flags & F_IPSEC_ON) 2443 get_ipsec_sa(pkt_dev, flow); 2444 #endif 2445 pkt_dev->nflows++; 2446 } 2447 } 2448 } else { /* IPV6 * */ 2449 2450 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 && 2451 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 && 2452 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 && 2453 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ; 2454 else { 2455 int i; 2456 2457 /* Only random destinations yet */ 2458 2459 for (i = 0; i < 4; i++) { 2460 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2461 (((__force __be32)random32() | 2462 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2463 pkt_dev->max_in6_daddr.s6_addr32[i]); 2464 } 2465 } 2466 } 2467 2468 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2469 __u32 t; 2470 if (pkt_dev->flags & F_TXSIZE_RND) { 2471 t = random32() % 2472 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2473 + pkt_dev->min_pkt_size; 2474 } else { 2475 t = pkt_dev->cur_pkt_size + 1; 2476 if (t > pkt_dev->max_pkt_size) 2477 t = pkt_dev->min_pkt_size; 2478 } 2479 pkt_dev->cur_pkt_size = t; 2480 } 2481 2482 set_cur_queue_map(pkt_dev); 2483 2484 pkt_dev->flows[flow].count++; 2485 } 2486 2487 2488 #ifdef CONFIG_XFRM 2489 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2490 { 2491 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2492 int err = 0; 2493 struct iphdr *iph; 2494 2495 if (!x) 2496 return 0; 2497 /* XXX: we dont support tunnel mode for now until 2498 * we resolve the dst issue */ 2499 if (x->props.mode != XFRM_MODE_TRANSPORT) 2500 return 0; 2501 2502 spin_lock(&x->lock); 2503 iph = ip_hdr(skb); 2504 2505 err = x->outer_mode->output(x, skb); 2506 if (err) 2507 goto error; 2508 err = x->type->output(x, skb); 2509 if (err) 2510 goto error; 2511 2512 x->curlft.bytes += skb->len; 2513 x->curlft.packets++; 2514 error: 2515 spin_unlock(&x->lock); 2516 return err; 2517 } 2518 2519 static void free_SAs(struct pktgen_dev *pkt_dev) 2520 { 2521 if (pkt_dev->cflows) { 2522 /* let go of the SAs if we have them */ 2523 int i; 2524 for (i = 0; i < pkt_dev->cflows; i++) { 2525 struct xfrm_state *x = pkt_dev->flows[i].x; 2526 if (x) { 2527 xfrm_state_put(x); 2528 pkt_dev->flows[i].x = NULL; 2529 } 2530 } 2531 } 2532 } 2533 2534 static int process_ipsec(struct pktgen_dev *pkt_dev, 2535 struct sk_buff *skb, __be16 protocol) 2536 { 2537 if (pkt_dev->flags & F_IPSEC_ON) { 2538 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2539 int nhead = 0; 2540 if (x) { 2541 int ret; 2542 __u8 *eth; 2543 nhead = x->props.header_len - skb_headroom(skb); 2544 if (nhead > 0) { 2545 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2546 if (ret < 0) { 2547 pr_err("Error expanding ipsec packet %d\n", 2548 ret); 2549 goto err; 2550 } 2551 } 2552 2553 /* ipsec is not expecting ll header */ 2554 skb_pull(skb, ETH_HLEN); 2555 ret = pktgen_output_ipsec(skb, pkt_dev); 2556 if (ret) { 2557 pr_err("Error creating ipsec packet %d\n", ret); 2558 goto err; 2559 } 2560 /* restore ll */ 2561 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2562 memcpy(eth, pkt_dev->hh, 12); 2563 *(u16 *) ð[12] = protocol; 2564 } 2565 } 2566 return 1; 2567 err: 2568 kfree_skb(skb); 2569 return 0; 2570 } 2571 #endif 2572 2573 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2574 { 2575 unsigned i; 2576 for (i = 0; i < pkt_dev->nr_labels; i++) 2577 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2578 2579 mpls--; 2580 *mpls |= MPLS_STACK_BOTTOM; 2581 } 2582 2583 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2584 unsigned int prio) 2585 { 2586 return htons(id | (cfi << 12) | (prio << 13)); 2587 } 2588 2589 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2590 struct pktgen_dev *pkt_dev) 2591 { 2592 struct sk_buff *skb = NULL; 2593 __u8 *eth; 2594 struct udphdr *udph; 2595 int datalen, iplen; 2596 struct iphdr *iph; 2597 struct pktgen_hdr *pgh = NULL; 2598 __be16 protocol = htons(ETH_P_IP); 2599 __be32 *mpls; 2600 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2601 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2602 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2603 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2604 u16 queue_map; 2605 2606 if (pkt_dev->nr_labels) 2607 protocol = htons(ETH_P_MPLS_UC); 2608 2609 if (pkt_dev->vlan_id != 0xffff) 2610 protocol = htons(ETH_P_8021Q); 2611 2612 /* Update any of the values, used when we're incrementing various 2613 * fields. 2614 */ 2615 mod_cur_headers(pkt_dev); 2616 queue_map = pkt_dev->cur_queue_map; 2617 2618 datalen = (odev->hard_header_len + 16) & ~0xf; 2619 2620 if (pkt_dev->flags & F_NODE) { 2621 int node; 2622 2623 if (pkt_dev->node >= 0) 2624 node = pkt_dev->node; 2625 else 2626 node = numa_node_id(); 2627 2628 skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64 2629 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node); 2630 if (likely(skb)) { 2631 skb_reserve(skb, NET_SKB_PAD); 2632 skb->dev = odev; 2633 } 2634 } 2635 else 2636 skb = __netdev_alloc_skb(odev, 2637 pkt_dev->cur_pkt_size + 64 2638 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT); 2639 2640 if (!skb) { 2641 sprintf(pkt_dev->result, "No memory"); 2642 return NULL; 2643 } 2644 2645 skb_reserve(skb, datalen); 2646 2647 /* Reserve for ethernet and IP header */ 2648 eth = (__u8 *) skb_push(skb, 14); 2649 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2650 if (pkt_dev->nr_labels) 2651 mpls_push(mpls, pkt_dev); 2652 2653 if (pkt_dev->vlan_id != 0xffff) { 2654 if (pkt_dev->svlan_id != 0xffff) { 2655 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2656 *svlan_tci = build_tci(pkt_dev->svlan_id, 2657 pkt_dev->svlan_cfi, 2658 pkt_dev->svlan_p); 2659 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2660 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2661 } 2662 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2663 *vlan_tci = build_tci(pkt_dev->vlan_id, 2664 pkt_dev->vlan_cfi, 2665 pkt_dev->vlan_p); 2666 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2667 *vlan_encapsulated_proto = htons(ETH_P_IP); 2668 } 2669 2670 skb->network_header = skb->tail; 2671 skb->transport_header = skb->network_header + sizeof(struct iphdr); 2672 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr)); 2673 skb_set_queue_mapping(skb, queue_map); 2674 iph = ip_hdr(skb); 2675 udph = udp_hdr(skb); 2676 2677 memcpy(eth, pkt_dev->hh, 12); 2678 *(__be16 *) & eth[12] = protocol; 2679 2680 /* Eth + IPh + UDPh + mpls */ 2681 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2682 pkt_dev->pkt_overhead; 2683 if (datalen < sizeof(struct pktgen_hdr)) 2684 datalen = sizeof(struct pktgen_hdr); 2685 2686 udph->source = htons(pkt_dev->cur_udp_src); 2687 udph->dest = htons(pkt_dev->cur_udp_dst); 2688 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2689 udph->check = 0; /* No checksum */ 2690 2691 iph->ihl = 5; 2692 iph->version = 4; 2693 iph->ttl = 32; 2694 iph->tos = pkt_dev->tos; 2695 iph->protocol = IPPROTO_UDP; /* UDP */ 2696 iph->saddr = pkt_dev->cur_saddr; 2697 iph->daddr = pkt_dev->cur_daddr; 2698 iph->id = htons(pkt_dev->ip_id); 2699 pkt_dev->ip_id++; 2700 iph->frag_off = 0; 2701 iplen = 20 + 8 + datalen; 2702 iph->tot_len = htons(iplen); 2703 iph->check = 0; 2704 iph->check = ip_fast_csum((void *)iph, iph->ihl); 2705 skb->protocol = protocol; 2706 skb->mac_header = (skb->network_header - ETH_HLEN - 2707 pkt_dev->pkt_overhead); 2708 skb->dev = odev; 2709 skb->pkt_type = PACKET_HOST; 2710 2711 if (pkt_dev->nfrags <= 0) { 2712 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 2713 memset(pgh + 1, 0, datalen - sizeof(struct pktgen_hdr)); 2714 } else { 2715 int frags = pkt_dev->nfrags; 2716 int i, len; 2717 2718 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 2719 2720 if (frags > MAX_SKB_FRAGS) 2721 frags = MAX_SKB_FRAGS; 2722 if (datalen > frags * PAGE_SIZE) { 2723 len = datalen - frags * PAGE_SIZE; 2724 memset(skb_put(skb, len), 0, len); 2725 datalen = frags * PAGE_SIZE; 2726 } 2727 2728 i = 0; 2729 while (datalen > 0) { 2730 struct page *page = alloc_pages(GFP_KERNEL | __GFP_ZERO, 0); 2731 skb_shinfo(skb)->frags[i].page = page; 2732 skb_shinfo(skb)->frags[i].page_offset = 0; 2733 skb_shinfo(skb)->frags[i].size = 2734 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 2735 datalen -= skb_shinfo(skb)->frags[i].size; 2736 skb->len += skb_shinfo(skb)->frags[i].size; 2737 skb->data_len += skb_shinfo(skb)->frags[i].size; 2738 i++; 2739 skb_shinfo(skb)->nr_frags = i; 2740 } 2741 2742 while (i < frags) { 2743 int rem; 2744 2745 if (i == 0) 2746 break; 2747 2748 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 2749 if (rem == 0) 2750 break; 2751 2752 skb_shinfo(skb)->frags[i - 1].size -= rem; 2753 2754 skb_shinfo(skb)->frags[i] = 2755 skb_shinfo(skb)->frags[i - 1]; 2756 get_page(skb_shinfo(skb)->frags[i].page); 2757 skb_shinfo(skb)->frags[i].page = 2758 skb_shinfo(skb)->frags[i - 1].page; 2759 skb_shinfo(skb)->frags[i].page_offset += 2760 skb_shinfo(skb)->frags[i - 1].size; 2761 skb_shinfo(skb)->frags[i].size = rem; 2762 i++; 2763 skb_shinfo(skb)->nr_frags = i; 2764 } 2765 } 2766 2767 /* Stamp the time, and sequence number, 2768 * convert them to network byte order 2769 */ 2770 if (pgh) { 2771 struct timeval timestamp; 2772 2773 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2774 pgh->seq_num = htonl(pkt_dev->seq_num); 2775 2776 do_gettimeofday(×tamp); 2777 pgh->tv_sec = htonl(timestamp.tv_sec); 2778 pgh->tv_usec = htonl(timestamp.tv_usec); 2779 } 2780 2781 #ifdef CONFIG_XFRM 2782 if (!process_ipsec(pkt_dev, skb, protocol)) 2783 return NULL; 2784 #endif 2785 2786 return skb; 2787 } 2788 2789 /* 2790 * scan_ip6, fmt_ip taken from dietlibc-0.21 2791 * Author Felix von Leitner <felix-dietlibc@fefe.de> 2792 * 2793 * Slightly modified for kernel. 2794 * Should be candidate for net/ipv4/utils.c 2795 * --ro 2796 */ 2797 2798 static unsigned int scan_ip6(const char *s, char ip[16]) 2799 { 2800 unsigned int i; 2801 unsigned int len = 0; 2802 unsigned long u; 2803 char suffix[16]; 2804 unsigned int prefixlen = 0; 2805 unsigned int suffixlen = 0; 2806 __be32 tmp; 2807 char *pos; 2808 2809 for (i = 0; i < 16; i++) 2810 ip[i] = 0; 2811 2812 for (;;) { 2813 if (*s == ':') { 2814 len++; 2815 if (s[1] == ':') { /* Found "::", skip to part 2 */ 2816 s += 2; 2817 len++; 2818 break; 2819 } 2820 s++; 2821 } 2822 2823 u = simple_strtoul(s, &pos, 16); 2824 i = pos - s; 2825 if (!i) 2826 return 0; 2827 if (prefixlen == 12 && s[i] == '.') { 2828 2829 /* the last 4 bytes may be written as IPv4 address */ 2830 2831 tmp = in_aton(s); 2832 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp)); 2833 return i + len; 2834 } 2835 ip[prefixlen++] = (u >> 8); 2836 ip[prefixlen++] = (u & 255); 2837 s += i; 2838 len += i; 2839 if (prefixlen == 16) 2840 return len; 2841 } 2842 2843 /* part 2, after "::" */ 2844 for (;;) { 2845 if (*s == ':') { 2846 if (suffixlen == 0) 2847 break; 2848 s++; 2849 len++; 2850 } else if (suffixlen != 0) 2851 break; 2852 2853 u = simple_strtol(s, &pos, 16); 2854 i = pos - s; 2855 if (!i) { 2856 if (*s) 2857 len--; 2858 break; 2859 } 2860 if (suffixlen + prefixlen <= 12 && s[i] == '.') { 2861 tmp = in_aton(s); 2862 memcpy((struct in_addr *)(suffix + suffixlen), &tmp, 2863 sizeof(tmp)); 2864 suffixlen += 4; 2865 len += strlen(s); 2866 break; 2867 } 2868 suffix[suffixlen++] = (u >> 8); 2869 suffix[suffixlen++] = (u & 255); 2870 s += i; 2871 len += i; 2872 if (prefixlen + suffixlen == 16) 2873 break; 2874 } 2875 for (i = 0; i < suffixlen; i++) 2876 ip[16 - suffixlen + i] = suffix[i]; 2877 return len; 2878 } 2879 2880 static char tohex(char hexdigit) 2881 { 2882 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0'; 2883 } 2884 2885 static int fmt_xlong(char *s, unsigned int i) 2886 { 2887 char *bak = s; 2888 *s = tohex((i >> 12) & 0xf); 2889 if (s != bak || *s != '0') 2890 ++s; 2891 *s = tohex((i >> 8) & 0xf); 2892 if (s != bak || *s != '0') 2893 ++s; 2894 *s = tohex((i >> 4) & 0xf); 2895 if (s != bak || *s != '0') 2896 ++s; 2897 *s = tohex(i & 0xf); 2898 return s - bak + 1; 2899 } 2900 2901 static unsigned int fmt_ip6(char *s, const char ip[16]) 2902 { 2903 unsigned int len; 2904 unsigned int i; 2905 unsigned int temp; 2906 unsigned int compressing; 2907 int j; 2908 2909 len = 0; 2910 compressing = 0; 2911 for (j = 0; j < 16; j += 2) { 2912 2913 #ifdef V4MAPPEDPREFIX 2914 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) { 2915 inet_ntoa_r(*(struct in_addr *)(ip + 12), s); 2916 temp = strlen(s); 2917 return len + temp; 2918 } 2919 #endif 2920 temp = ((unsigned long)(unsigned char)ip[j] << 8) + 2921 (unsigned long)(unsigned char)ip[j + 1]; 2922 if (temp == 0) { 2923 if (!compressing) { 2924 compressing = 1; 2925 if (j == 0) { 2926 *s++ = ':'; 2927 ++len; 2928 } 2929 } 2930 } else { 2931 if (compressing) { 2932 compressing = 0; 2933 *s++ = ':'; 2934 ++len; 2935 } 2936 i = fmt_xlong(s, temp); 2937 len += i; 2938 s += i; 2939 if (j < 14) { 2940 *s++ = ':'; 2941 ++len; 2942 } 2943 } 2944 } 2945 if (compressing) { 2946 *s++ = ':'; 2947 ++len; 2948 } 2949 *s = 0; 2950 return len; 2951 } 2952 2953 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2954 struct pktgen_dev *pkt_dev) 2955 { 2956 struct sk_buff *skb = NULL; 2957 __u8 *eth; 2958 struct udphdr *udph; 2959 int datalen; 2960 struct ipv6hdr *iph; 2961 struct pktgen_hdr *pgh = NULL; 2962 __be16 protocol = htons(ETH_P_IPV6); 2963 __be32 *mpls; 2964 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2965 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2966 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2967 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2968 u16 queue_map; 2969 2970 if (pkt_dev->nr_labels) 2971 protocol = htons(ETH_P_MPLS_UC); 2972 2973 if (pkt_dev->vlan_id != 0xffff) 2974 protocol = htons(ETH_P_8021Q); 2975 2976 /* Update any of the values, used when we're incrementing various 2977 * fields. 2978 */ 2979 mod_cur_headers(pkt_dev); 2980 queue_map = pkt_dev->cur_queue_map; 2981 2982 skb = __netdev_alloc_skb(odev, 2983 pkt_dev->cur_pkt_size + 64 2984 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT); 2985 if (!skb) { 2986 sprintf(pkt_dev->result, "No memory"); 2987 return NULL; 2988 } 2989 2990 skb_reserve(skb, 16); 2991 2992 /* Reserve for ethernet and IP header */ 2993 eth = (__u8 *) skb_push(skb, 14); 2994 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2995 if (pkt_dev->nr_labels) 2996 mpls_push(mpls, pkt_dev); 2997 2998 if (pkt_dev->vlan_id != 0xffff) { 2999 if (pkt_dev->svlan_id != 0xffff) { 3000 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 3001 *svlan_tci = build_tci(pkt_dev->svlan_id, 3002 pkt_dev->svlan_cfi, 3003 pkt_dev->svlan_p); 3004 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 3005 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 3006 } 3007 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 3008 *vlan_tci = build_tci(pkt_dev->vlan_id, 3009 pkt_dev->vlan_cfi, 3010 pkt_dev->vlan_p); 3011 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 3012 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 3013 } 3014 3015 skb->network_header = skb->tail; 3016 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr); 3017 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr)); 3018 skb_set_queue_mapping(skb, queue_map); 3019 iph = ipv6_hdr(skb); 3020 udph = udp_hdr(skb); 3021 3022 memcpy(eth, pkt_dev->hh, 12); 3023 *(__be16 *) ð[12] = protocol; 3024 3025 /* Eth + IPh + UDPh + mpls */ 3026 datalen = pkt_dev->cur_pkt_size - 14 - 3027 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 3028 pkt_dev->pkt_overhead; 3029 3030 if (datalen < sizeof(struct pktgen_hdr)) { 3031 datalen = sizeof(struct pktgen_hdr); 3032 if (net_ratelimit()) 3033 pr_info("increased datalen to %d\n", datalen); 3034 } 3035 3036 udph->source = htons(pkt_dev->cur_udp_src); 3037 udph->dest = htons(pkt_dev->cur_udp_dst); 3038 udph->len = htons(datalen + sizeof(struct udphdr)); 3039 udph->check = 0; /* No checksum */ 3040 3041 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 3042 3043 if (pkt_dev->traffic_class) { 3044 /* Version + traffic class + flow (0) */ 3045 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 3046 } 3047 3048 iph->hop_limit = 32; 3049 3050 iph->payload_len = htons(sizeof(struct udphdr) + datalen); 3051 iph->nexthdr = IPPROTO_UDP; 3052 3053 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr); 3054 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr); 3055 3056 skb->mac_header = (skb->network_header - ETH_HLEN - 3057 pkt_dev->pkt_overhead); 3058 skb->protocol = protocol; 3059 skb->dev = odev; 3060 skb->pkt_type = PACKET_HOST; 3061 3062 if (pkt_dev->nfrags <= 0) 3063 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 3064 else { 3065 int frags = pkt_dev->nfrags; 3066 int i; 3067 3068 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 3069 3070 if (frags > MAX_SKB_FRAGS) 3071 frags = MAX_SKB_FRAGS; 3072 if (datalen > frags * PAGE_SIZE) { 3073 skb_put(skb, datalen - frags * PAGE_SIZE); 3074 datalen = frags * PAGE_SIZE; 3075 } 3076 3077 i = 0; 3078 while (datalen > 0) { 3079 struct page *page = alloc_pages(GFP_KERNEL, 0); 3080 skb_shinfo(skb)->frags[i].page = page; 3081 skb_shinfo(skb)->frags[i].page_offset = 0; 3082 skb_shinfo(skb)->frags[i].size = 3083 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 3084 datalen -= skb_shinfo(skb)->frags[i].size; 3085 skb->len += skb_shinfo(skb)->frags[i].size; 3086 skb->data_len += skb_shinfo(skb)->frags[i].size; 3087 i++; 3088 skb_shinfo(skb)->nr_frags = i; 3089 } 3090 3091 while (i < frags) { 3092 int rem; 3093 3094 if (i == 0) 3095 break; 3096 3097 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 3098 if (rem == 0) 3099 break; 3100 3101 skb_shinfo(skb)->frags[i - 1].size -= rem; 3102 3103 skb_shinfo(skb)->frags[i] = 3104 skb_shinfo(skb)->frags[i - 1]; 3105 get_page(skb_shinfo(skb)->frags[i].page); 3106 skb_shinfo(skb)->frags[i].page = 3107 skb_shinfo(skb)->frags[i - 1].page; 3108 skb_shinfo(skb)->frags[i].page_offset += 3109 skb_shinfo(skb)->frags[i - 1].size; 3110 skb_shinfo(skb)->frags[i].size = rem; 3111 i++; 3112 skb_shinfo(skb)->nr_frags = i; 3113 } 3114 } 3115 3116 /* Stamp the time, and sequence number, 3117 * convert them to network byte order 3118 * should we update cloned packets too ? 3119 */ 3120 if (pgh) { 3121 struct timeval timestamp; 3122 3123 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 3124 pgh->seq_num = htonl(pkt_dev->seq_num); 3125 3126 do_gettimeofday(×tamp); 3127 pgh->tv_sec = htonl(timestamp.tv_sec); 3128 pgh->tv_usec = htonl(timestamp.tv_usec); 3129 } 3130 /* pkt_dev->seq_num++; FF: you really mean this? */ 3131 3132 return skb; 3133 } 3134 3135 static struct sk_buff *fill_packet(struct net_device *odev, 3136 struct pktgen_dev *pkt_dev) 3137 { 3138 if (pkt_dev->flags & F_IPV6) 3139 return fill_packet_ipv6(odev, pkt_dev); 3140 else 3141 return fill_packet_ipv4(odev, pkt_dev); 3142 } 3143 3144 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 3145 { 3146 pkt_dev->seq_num = 1; 3147 pkt_dev->idle_acc = 0; 3148 pkt_dev->sofar = 0; 3149 pkt_dev->tx_bytes = 0; 3150 pkt_dev->errors = 0; 3151 } 3152 3153 /* Set up structure for sending pkts, clear counters */ 3154 3155 static void pktgen_run(struct pktgen_thread *t) 3156 { 3157 struct pktgen_dev *pkt_dev; 3158 int started = 0; 3159 3160 func_enter(); 3161 3162 if_lock(t); 3163 list_for_each_entry(pkt_dev, &t->if_list, list) { 3164 3165 /* 3166 * setup odev and create initial packet. 3167 */ 3168 pktgen_setup_inject(pkt_dev); 3169 3170 if (pkt_dev->odev) { 3171 pktgen_clear_counters(pkt_dev); 3172 pkt_dev->running = 1; /* Cranke yeself! */ 3173 pkt_dev->skb = NULL; 3174 pkt_dev->started_at = 3175 pkt_dev->next_tx = ktime_now(); 3176 3177 set_pkt_overhead(pkt_dev); 3178 3179 strcpy(pkt_dev->result, "Starting"); 3180 started++; 3181 } else 3182 strcpy(pkt_dev->result, "Error starting"); 3183 } 3184 if_unlock(t); 3185 if (started) 3186 t->control &= ~(T_STOP); 3187 } 3188 3189 static void pktgen_stop_all_threads_ifs(void) 3190 { 3191 struct pktgen_thread *t; 3192 3193 func_enter(); 3194 3195 mutex_lock(&pktgen_thread_lock); 3196 3197 list_for_each_entry(t, &pktgen_threads, th_list) 3198 t->control |= T_STOP; 3199 3200 mutex_unlock(&pktgen_thread_lock); 3201 } 3202 3203 static int thread_is_running(const struct pktgen_thread *t) 3204 { 3205 const struct pktgen_dev *pkt_dev; 3206 3207 list_for_each_entry(pkt_dev, &t->if_list, list) 3208 if (pkt_dev->running) 3209 return 1; 3210 return 0; 3211 } 3212 3213 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3214 { 3215 if_lock(t); 3216 3217 while (thread_is_running(t)) { 3218 3219 if_unlock(t); 3220 3221 msleep_interruptible(100); 3222 3223 if (signal_pending(current)) 3224 goto signal; 3225 if_lock(t); 3226 } 3227 if_unlock(t); 3228 return 1; 3229 signal: 3230 return 0; 3231 } 3232 3233 static int pktgen_wait_all_threads_run(void) 3234 { 3235 struct pktgen_thread *t; 3236 int sig = 1; 3237 3238 mutex_lock(&pktgen_thread_lock); 3239 3240 list_for_each_entry(t, &pktgen_threads, th_list) { 3241 sig = pktgen_wait_thread_run(t); 3242 if (sig == 0) 3243 break; 3244 } 3245 3246 if (sig == 0) 3247 list_for_each_entry(t, &pktgen_threads, th_list) 3248 t->control |= (T_STOP); 3249 3250 mutex_unlock(&pktgen_thread_lock); 3251 return sig; 3252 } 3253 3254 static void pktgen_run_all_threads(void) 3255 { 3256 struct pktgen_thread *t; 3257 3258 func_enter(); 3259 3260 mutex_lock(&pktgen_thread_lock); 3261 3262 list_for_each_entry(t, &pktgen_threads, th_list) 3263 t->control |= (T_RUN); 3264 3265 mutex_unlock(&pktgen_thread_lock); 3266 3267 /* Propagate thread->control */ 3268 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3269 3270 pktgen_wait_all_threads_run(); 3271 } 3272 3273 static void pktgen_reset_all_threads(void) 3274 { 3275 struct pktgen_thread *t; 3276 3277 func_enter(); 3278 3279 mutex_lock(&pktgen_thread_lock); 3280 3281 list_for_each_entry(t, &pktgen_threads, th_list) 3282 t->control |= (T_REMDEVALL); 3283 3284 mutex_unlock(&pktgen_thread_lock); 3285 3286 /* Propagate thread->control */ 3287 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3288 3289 pktgen_wait_all_threads_run(); 3290 } 3291 3292 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3293 { 3294 __u64 bps, mbps, pps; 3295 char *p = pkt_dev->result; 3296 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3297 pkt_dev->started_at); 3298 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3299 3300 p += sprintf(p, "OK: %llu(c%llu+d%llu) nsec, %llu (%dbyte,%dfrags)\n", 3301 (unsigned long long)ktime_to_us(elapsed), 3302 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3303 (unsigned long long)ktime_to_us(idle), 3304 (unsigned long long)pkt_dev->sofar, 3305 pkt_dev->cur_pkt_size, nr_frags); 3306 3307 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3308 ktime_to_ns(elapsed)); 3309 3310 bps = pps * 8 * pkt_dev->cur_pkt_size; 3311 3312 mbps = bps; 3313 do_div(mbps, 1000000); 3314 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3315 (unsigned long long)pps, 3316 (unsigned long long)mbps, 3317 (unsigned long long)bps, 3318 (unsigned long long)pkt_dev->errors); 3319 } 3320 3321 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3322 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3323 { 3324 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3325 3326 if (!pkt_dev->running) { 3327 pr_warning("interface: %s is already stopped\n", 3328 pkt_dev->odevname); 3329 return -EINVAL; 3330 } 3331 3332 kfree_skb(pkt_dev->skb); 3333 pkt_dev->skb = NULL; 3334 pkt_dev->stopped_at = ktime_now(); 3335 pkt_dev->running = 0; 3336 3337 show_results(pkt_dev, nr_frags); 3338 3339 return 0; 3340 } 3341 3342 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3343 { 3344 struct pktgen_dev *pkt_dev, *best = NULL; 3345 3346 if_lock(t); 3347 3348 list_for_each_entry(pkt_dev, &t->if_list, list) { 3349 if (!pkt_dev->running) 3350 continue; 3351 if (best == NULL) 3352 best = pkt_dev; 3353 else if (ktime_lt(pkt_dev->next_tx, best->next_tx)) 3354 best = pkt_dev; 3355 } 3356 if_unlock(t); 3357 return best; 3358 } 3359 3360 static void pktgen_stop(struct pktgen_thread *t) 3361 { 3362 struct pktgen_dev *pkt_dev; 3363 3364 func_enter(); 3365 3366 if_lock(t); 3367 3368 list_for_each_entry(pkt_dev, &t->if_list, list) { 3369 pktgen_stop_device(pkt_dev); 3370 } 3371 3372 if_unlock(t); 3373 } 3374 3375 /* 3376 * one of our devices needs to be removed - find it 3377 * and remove it 3378 */ 3379 static void pktgen_rem_one_if(struct pktgen_thread *t) 3380 { 3381 struct list_head *q, *n; 3382 struct pktgen_dev *cur; 3383 3384 func_enter(); 3385 3386 if_lock(t); 3387 3388 list_for_each_safe(q, n, &t->if_list) { 3389 cur = list_entry(q, struct pktgen_dev, list); 3390 3391 if (!cur->removal_mark) 3392 continue; 3393 3394 kfree_skb(cur->skb); 3395 cur->skb = NULL; 3396 3397 pktgen_remove_device(t, cur); 3398 3399 break; 3400 } 3401 3402 if_unlock(t); 3403 } 3404 3405 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3406 { 3407 struct list_head *q, *n; 3408 struct pktgen_dev *cur; 3409 3410 func_enter(); 3411 3412 /* Remove all devices, free mem */ 3413 3414 if_lock(t); 3415 3416 list_for_each_safe(q, n, &t->if_list) { 3417 cur = list_entry(q, struct pktgen_dev, list); 3418 3419 kfree_skb(cur->skb); 3420 cur->skb = NULL; 3421 3422 pktgen_remove_device(t, cur); 3423 } 3424 3425 if_unlock(t); 3426 } 3427 3428 static void pktgen_rem_thread(struct pktgen_thread *t) 3429 { 3430 /* Remove from the thread list */ 3431 3432 remove_proc_entry(t->tsk->comm, pg_proc_dir); 3433 3434 mutex_lock(&pktgen_thread_lock); 3435 3436 list_del(&t->th_list); 3437 3438 mutex_unlock(&pktgen_thread_lock); 3439 } 3440 3441 static void pktgen_resched(struct pktgen_dev *pkt_dev) 3442 { 3443 ktime_t idle_start = ktime_now(); 3444 schedule(); 3445 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3446 } 3447 3448 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) 3449 { 3450 ktime_t idle_start = ktime_now(); 3451 3452 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3453 if (signal_pending(current)) 3454 break; 3455 3456 if (need_resched()) 3457 pktgen_resched(pkt_dev); 3458 else 3459 cpu_relax(); 3460 } 3461 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3462 } 3463 3464 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3465 { 3466 struct net_device *odev = pkt_dev->odev; 3467 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *) 3468 = odev->netdev_ops->ndo_start_xmit; 3469 struct netdev_queue *txq; 3470 u16 queue_map; 3471 int ret; 3472 3473 /* If device is offline, then don't send */ 3474 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { 3475 pktgen_stop_device(pkt_dev); 3476 return; 3477 } 3478 3479 /* This is max DELAY, this has special meaning of 3480 * "never transmit" 3481 */ 3482 if (unlikely(pkt_dev->delay == ULLONG_MAX)) { 3483 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX); 3484 return; 3485 } 3486 3487 /* If no skb or clone count exhausted then get new one */ 3488 if (!pkt_dev->skb || (pkt_dev->last_ok && 3489 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { 3490 /* build a new pkt */ 3491 kfree_skb(pkt_dev->skb); 3492 3493 pkt_dev->skb = fill_packet(odev, pkt_dev); 3494 if (pkt_dev->skb == NULL) { 3495 pr_err("ERROR: couldn't allocate skb in fill_packet\n"); 3496 schedule(); 3497 pkt_dev->clone_count--; /* back out increment, OOM */ 3498 return; 3499 } 3500 pkt_dev->last_pkt_size = pkt_dev->skb->len; 3501 pkt_dev->allocated_skbs++; 3502 pkt_dev->clone_count = 0; /* reset counter */ 3503 } 3504 3505 if (pkt_dev->delay && pkt_dev->last_ok) 3506 spin(pkt_dev, pkt_dev->next_tx); 3507 3508 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3509 txq = netdev_get_tx_queue(odev, queue_map); 3510 3511 __netif_tx_lock_bh(txq); 3512 3513 if (unlikely(netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq))) { 3514 ret = NETDEV_TX_BUSY; 3515 pkt_dev->last_ok = 0; 3516 goto unlock; 3517 } 3518 atomic_inc(&(pkt_dev->skb->users)); 3519 ret = (*xmit)(pkt_dev->skb, odev); 3520 3521 switch (ret) { 3522 case NETDEV_TX_OK: 3523 txq_trans_update(txq); 3524 pkt_dev->last_ok = 1; 3525 pkt_dev->sofar++; 3526 pkt_dev->seq_num++; 3527 pkt_dev->tx_bytes += pkt_dev->last_pkt_size; 3528 break; 3529 case NET_XMIT_DROP: 3530 case NET_XMIT_CN: 3531 case NET_XMIT_POLICED: 3532 /* skb has been consumed */ 3533 pkt_dev->errors++; 3534 break; 3535 default: /* Drivers are not supposed to return other values! */ 3536 if (net_ratelimit()) 3537 pr_info("pktgen: %s xmit error: %d\n", 3538 pkt_dev->odevname, ret); 3539 pkt_dev->errors++; 3540 /* fallthru */ 3541 case NETDEV_TX_LOCKED: 3542 case NETDEV_TX_BUSY: 3543 /* Retry it next time */ 3544 atomic_dec(&(pkt_dev->skb->users)); 3545 pkt_dev->last_ok = 0; 3546 } 3547 unlock: 3548 __netif_tx_unlock_bh(txq); 3549 3550 /* If pkt_dev->count is zero, then run forever */ 3551 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3552 pktgen_wait_for_skb(pkt_dev); 3553 3554 /* Done with this */ 3555 pktgen_stop_device(pkt_dev); 3556 } 3557 } 3558 3559 /* 3560 * Main loop of the thread goes here 3561 */ 3562 3563 static int pktgen_thread_worker(void *arg) 3564 { 3565 DEFINE_WAIT(wait); 3566 struct pktgen_thread *t = arg; 3567 struct pktgen_dev *pkt_dev = NULL; 3568 int cpu = t->cpu; 3569 3570 BUG_ON(smp_processor_id() != cpu); 3571 3572 init_waitqueue_head(&t->queue); 3573 complete(&t->start_done); 3574 3575 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); 3576 3577 set_current_state(TASK_INTERRUPTIBLE); 3578 3579 set_freezable(); 3580 3581 while (!kthread_should_stop()) { 3582 pkt_dev = next_to_run(t); 3583 3584 if (unlikely(!pkt_dev && t->control == 0)) { 3585 wait_event_interruptible_timeout(t->queue, 3586 t->control != 0, 3587 HZ/10); 3588 try_to_freeze(); 3589 continue; 3590 } 3591 3592 __set_current_state(TASK_RUNNING); 3593 3594 if (likely(pkt_dev)) { 3595 pktgen_xmit(pkt_dev); 3596 3597 if (need_resched()) 3598 pktgen_resched(pkt_dev); 3599 else 3600 cpu_relax(); 3601 } 3602 3603 if (t->control & T_STOP) { 3604 pktgen_stop(t); 3605 t->control &= ~(T_STOP); 3606 } 3607 3608 if (t->control & T_RUN) { 3609 pktgen_run(t); 3610 t->control &= ~(T_RUN); 3611 } 3612 3613 if (t->control & T_REMDEVALL) { 3614 pktgen_rem_all_ifs(t); 3615 t->control &= ~(T_REMDEVALL); 3616 } 3617 3618 if (t->control & T_REMDEV) { 3619 pktgen_rem_one_if(t); 3620 t->control &= ~(T_REMDEV); 3621 } 3622 3623 try_to_freeze(); 3624 3625 set_current_state(TASK_INTERRUPTIBLE); 3626 } 3627 3628 pr_debug("%s stopping all device\n", t->tsk->comm); 3629 pktgen_stop(t); 3630 3631 pr_debug("%s removing all device\n", t->tsk->comm); 3632 pktgen_rem_all_ifs(t); 3633 3634 pr_debug("%s removing thread\n", t->tsk->comm); 3635 pktgen_rem_thread(t); 3636 3637 return 0; 3638 } 3639 3640 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3641 const char *ifname, bool exact) 3642 { 3643 struct pktgen_dev *p, *pkt_dev = NULL; 3644 size_t len = strlen(ifname); 3645 3646 if_lock(t); 3647 list_for_each_entry(p, &t->if_list, list) 3648 if (strncmp(p->odevname, ifname, len) == 0) { 3649 if (p->odevname[len]) { 3650 if (exact || p->odevname[len] != '@') 3651 continue; 3652 } 3653 pkt_dev = p; 3654 break; 3655 } 3656 3657 if_unlock(t); 3658 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev); 3659 return pkt_dev; 3660 } 3661 3662 /* 3663 * Adds a dev at front of if_list. 3664 */ 3665 3666 static int add_dev_to_thread(struct pktgen_thread *t, 3667 struct pktgen_dev *pkt_dev) 3668 { 3669 int rv = 0; 3670 3671 if_lock(t); 3672 3673 if (pkt_dev->pg_thread) { 3674 pr_err("ERROR: already assigned to a thread\n"); 3675 rv = -EBUSY; 3676 goto out; 3677 } 3678 3679 list_add(&pkt_dev->list, &t->if_list); 3680 pkt_dev->pg_thread = t; 3681 pkt_dev->running = 0; 3682 3683 out: 3684 if_unlock(t); 3685 return rv; 3686 } 3687 3688 /* Called under thread lock */ 3689 3690 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3691 { 3692 struct pktgen_dev *pkt_dev; 3693 int err; 3694 int node = cpu_to_node(t->cpu); 3695 3696 /* We don't allow a device to be on several threads */ 3697 3698 pkt_dev = __pktgen_NN_threads(ifname, FIND); 3699 if (pkt_dev) { 3700 pr_err("ERROR: interface already used\n"); 3701 return -EBUSY; 3702 } 3703 3704 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); 3705 if (!pkt_dev) 3706 return -ENOMEM; 3707 3708 strcpy(pkt_dev->odevname, ifname); 3709 pkt_dev->flows = vmalloc_node(MAX_CFLOWS * sizeof(struct flow_state), 3710 node); 3711 if (pkt_dev->flows == NULL) { 3712 kfree(pkt_dev); 3713 return -ENOMEM; 3714 } 3715 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state)); 3716 3717 pkt_dev->removal_mark = 0; 3718 pkt_dev->min_pkt_size = ETH_ZLEN; 3719 pkt_dev->max_pkt_size = ETH_ZLEN; 3720 pkt_dev->nfrags = 0; 3721 pkt_dev->clone_skb = pg_clone_skb_d; 3722 pkt_dev->delay = pg_delay_d; 3723 pkt_dev->count = pg_count_d; 3724 pkt_dev->sofar = 0; 3725 pkt_dev->udp_src_min = 9; /* sink port */ 3726 pkt_dev->udp_src_max = 9; 3727 pkt_dev->udp_dst_min = 9; 3728 pkt_dev->udp_dst_max = 9; 3729 3730 pkt_dev->vlan_p = 0; 3731 pkt_dev->vlan_cfi = 0; 3732 pkt_dev->vlan_id = 0xffff; 3733 pkt_dev->svlan_p = 0; 3734 pkt_dev->svlan_cfi = 0; 3735 pkt_dev->svlan_id = 0xffff; 3736 pkt_dev->node = -1; 3737 3738 err = pktgen_setup_dev(pkt_dev, ifname); 3739 if (err) 3740 goto out1; 3741 3742 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir, 3743 &pktgen_if_fops, pkt_dev); 3744 if (!pkt_dev->entry) { 3745 pr_err("cannot create %s/%s procfs entry\n", 3746 PG_PROC_DIR, ifname); 3747 err = -EINVAL; 3748 goto out2; 3749 } 3750 #ifdef CONFIG_XFRM 3751 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3752 pkt_dev->ipsproto = IPPROTO_ESP; 3753 #endif 3754 3755 return add_dev_to_thread(t, pkt_dev); 3756 out2: 3757 dev_put(pkt_dev->odev); 3758 out1: 3759 #ifdef CONFIG_XFRM 3760 free_SAs(pkt_dev); 3761 #endif 3762 vfree(pkt_dev->flows); 3763 kfree(pkt_dev); 3764 return err; 3765 } 3766 3767 static int __init pktgen_create_thread(int cpu) 3768 { 3769 struct pktgen_thread *t; 3770 struct proc_dir_entry *pe; 3771 struct task_struct *p; 3772 3773 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL, 3774 cpu_to_node(cpu)); 3775 if (!t) { 3776 pr_err("ERROR: out of memory, can't create new thread\n"); 3777 return -ENOMEM; 3778 } 3779 3780 spin_lock_init(&t->if_lock); 3781 t->cpu = cpu; 3782 3783 INIT_LIST_HEAD(&t->if_list); 3784 3785 list_add_tail(&t->th_list, &pktgen_threads); 3786 init_completion(&t->start_done); 3787 3788 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu); 3789 if (IS_ERR(p)) { 3790 pr_err("kernel_thread() failed for cpu %d\n", t->cpu); 3791 list_del(&t->th_list); 3792 kfree(t); 3793 return PTR_ERR(p); 3794 } 3795 kthread_bind(p, cpu); 3796 t->tsk = p; 3797 3798 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir, 3799 &pktgen_thread_fops, t); 3800 if (!pe) { 3801 pr_err("cannot create %s/%s procfs entry\n", 3802 PG_PROC_DIR, t->tsk->comm); 3803 kthread_stop(p); 3804 list_del(&t->th_list); 3805 kfree(t); 3806 return -EINVAL; 3807 } 3808 3809 wake_up_process(p); 3810 wait_for_completion(&t->start_done); 3811 3812 return 0; 3813 } 3814 3815 /* 3816 * Removes a device from the thread if_list. 3817 */ 3818 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3819 struct pktgen_dev *pkt_dev) 3820 { 3821 struct list_head *q, *n; 3822 struct pktgen_dev *p; 3823 3824 list_for_each_safe(q, n, &t->if_list) { 3825 p = list_entry(q, struct pktgen_dev, list); 3826 if (p == pkt_dev) 3827 list_del(&p->list); 3828 } 3829 } 3830 3831 static int pktgen_remove_device(struct pktgen_thread *t, 3832 struct pktgen_dev *pkt_dev) 3833 { 3834 3835 pr_debug("remove_device pkt_dev=%p\n", pkt_dev); 3836 3837 if (pkt_dev->running) { 3838 pr_warning("WARNING: trying to remove a running interface, stopping it now\n"); 3839 pktgen_stop_device(pkt_dev); 3840 } 3841 3842 /* Dis-associate from the interface */ 3843 3844 if (pkt_dev->odev) { 3845 dev_put(pkt_dev->odev); 3846 pkt_dev->odev = NULL; 3847 } 3848 3849 /* And update the thread if_list */ 3850 3851 _rem_dev_from_if_list(t, pkt_dev); 3852 3853 if (pkt_dev->entry) 3854 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 3855 3856 #ifdef CONFIG_XFRM 3857 free_SAs(pkt_dev); 3858 #endif 3859 vfree(pkt_dev->flows); 3860 kfree(pkt_dev); 3861 return 0; 3862 } 3863 3864 static int __init pg_init(void) 3865 { 3866 int cpu; 3867 struct proc_dir_entry *pe; 3868 3869 pr_info("%s", version); 3870 3871 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net); 3872 if (!pg_proc_dir) 3873 return -ENODEV; 3874 3875 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops); 3876 if (pe == NULL) { 3877 pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL); 3878 proc_net_remove(&init_net, PG_PROC_DIR); 3879 return -EINVAL; 3880 } 3881 3882 /* Register us to receive netdevice events */ 3883 register_netdevice_notifier(&pktgen_notifier_block); 3884 3885 for_each_online_cpu(cpu) { 3886 int err; 3887 3888 err = pktgen_create_thread(cpu); 3889 if (err) 3890 pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n", 3891 cpu, err); 3892 } 3893 3894 if (list_empty(&pktgen_threads)) { 3895 pr_err("ERROR: Initialization failed for all threads\n"); 3896 unregister_netdevice_notifier(&pktgen_notifier_block); 3897 remove_proc_entry(PGCTRL, pg_proc_dir); 3898 proc_net_remove(&init_net, PG_PROC_DIR); 3899 return -ENODEV; 3900 } 3901 3902 return 0; 3903 } 3904 3905 static void __exit pg_cleanup(void) 3906 { 3907 struct pktgen_thread *t; 3908 struct list_head *q, *n; 3909 3910 /* Stop all interfaces & threads */ 3911 3912 list_for_each_safe(q, n, &pktgen_threads) { 3913 t = list_entry(q, struct pktgen_thread, th_list); 3914 kthread_stop(t->tsk); 3915 kfree(t); 3916 } 3917 3918 /* Un-register us from receiving netdevice events */ 3919 unregister_netdevice_notifier(&pktgen_notifier_block); 3920 3921 /* Clean up proc file system */ 3922 remove_proc_entry(PGCTRL, pg_proc_dir); 3923 proc_net_remove(&init_net, PG_PROC_DIR); 3924 } 3925 3926 module_init(pg_init); 3927 module_exit(pg_cleanup); 3928 3929 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); 3930 MODULE_DESCRIPTION("Packet Generator tool"); 3931 MODULE_LICENSE("GPL"); 3932 MODULE_VERSION(VERSION); 3933 module_param(pg_count_d, int, 0); 3934 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); 3935 module_param(pg_delay_d, int, 0); 3936 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); 3937 module_param(pg_clone_skb_d, int, 0); 3938 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); 3939 module_param(debug, int, 0); 3940 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); 3941