1 /* 2 * Authors: 3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se> 4 * Uppsala University and 5 * Swedish University of Agricultural Sciences 6 * 7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> 8 * Ben Greear <greearb@candelatech.com> 9 * Jens Låås <jens.laas@data.slu.se> 10 * 11 * This program is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License 13 * as published by the Free Software Foundation; either version 14 * 2 of the License, or (at your option) any later version. 15 * 16 * 17 * A tool for loading the network with preconfigurated packets. 18 * The tool is implemented as a linux module. Parameters are output 19 * device, delay (to hard_xmit), number of packets, and whether 20 * to use multiple SKBs or just the same one. 21 * pktgen uses the installed interface's output routine. 22 * 23 * Additional hacking by: 24 * 25 * Jens.Laas@data.slu.se 26 * Improved by ANK. 010120. 27 * Improved by ANK even more. 010212. 28 * MAC address typo fixed. 010417 --ro 29 * Integrated. 020301 --DaveM 30 * Added multiskb option 020301 --DaveM 31 * Scaling of results. 020417--sigurdur@linpro.no 32 * Significant re-work of the module: 33 * * Convert to threaded model to more efficiently be able to transmit 34 * and receive on multiple interfaces at once. 35 * * Converted many counters to __u64 to allow longer runs. 36 * * Allow configuration of ranges, like min/max IP address, MACs, 37 * and UDP-ports, for both source and destination, and can 38 * set to use a random distribution or sequentially walk the range. 39 * * Can now change most values after starting. 40 * * Place 12-byte packet in UDP payload with magic number, 41 * sequence number, and timestamp. 42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and 43 * latencies (with micro-second) precision. 44 * * Add IOCTL interface to easily get counters & configuration. 45 * --Ben Greear <greearb@candelatech.com> 46 * 47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct 48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0 49 * as a "fastpath" with a configurable number of clones after alloc's. 50 * clone_skb=0 means all packets are allocated this also means ranges time 51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100 52 * clones. 53 * 54 * Also moved to /proc/net/pktgen/ 55 * --ro 56 * 57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever 58 * mistakes. Also merged in DaveM's patch in the -pre6 patch. 59 * --Ben Greear <greearb@candelatech.com> 60 * 61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br) 62 * 63 * 64 * 021124 Finished major redesign and rewrite for new functionality. 65 * See Documentation/networking/pktgen.txt for how to use this. 66 * 67 * The new operation: 68 * For each CPU one thread/process is created at start. This process checks 69 * for running devices in the if_list and sends packets until count is 0 it 70 * also the thread checks the thread->control which is used for inter-process 71 * communication. controlling process "posts" operations to the threads this 72 * way. The if_lock should be possible to remove when add/rem_device is merged 73 * into this too. 74 * 75 * By design there should only be *one* "controlling" process. In practice 76 * multiple write accesses gives unpredictable result. Understood by "write" 77 * to /proc gives result code thats should be read be the "writer". 78 * For practical use this should be no problem. 79 * 80 * Note when adding devices to a specific CPU there good idea to also assign 81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU. 82 * --ro 83 * 84 * Fix refcount off by one if first packet fails, potential null deref, 85 * memleak 030710- KJP 86 * 87 * First "ranges" functionality for ipv6 030726 --ro 88 * 89 * Included flow support. 030802 ANK. 90 * 91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org> 92 * 93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419 94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604 95 * 96 * New xmit() return, do_div and misc clean up by Stephen Hemminger 97 * <shemminger@osdl.org> 040923 98 * 99 * Randy Dunlap fixed u64 printk compiler waring 100 * 101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org> 102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213 103 * 104 * Corrections from Nikolai Malykh (nmalykh@bilim.com) 105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230 106 * 107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com> 108 * 050103 109 * 110 * MPLS support by Steven Whitehouse <steve@chygwyn.com> 111 * 112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com> 113 * 114 * Fixed src_mac command to set source mac of packet to value specified in 115 * command by Adit Ranadive <adit.262@gmail.com> 116 * 117 */ 118 #include <linux/sys.h> 119 #include <linux/types.h> 120 #include <linux/module.h> 121 #include <linux/moduleparam.h> 122 #include <linux/kernel.h> 123 #include <linux/mutex.h> 124 #include <linux/sched.h> 125 #include <linux/slab.h> 126 #include <linux/vmalloc.h> 127 #include <linux/unistd.h> 128 #include <linux/string.h> 129 #include <linux/ptrace.h> 130 #include <linux/errno.h> 131 #include <linux/ioport.h> 132 #include <linux/interrupt.h> 133 #include <linux/capability.h> 134 #include <linux/hrtimer.h> 135 #include <linux/freezer.h> 136 #include <linux/delay.h> 137 #include <linux/timer.h> 138 #include <linux/list.h> 139 #include <linux/init.h> 140 #include <linux/skbuff.h> 141 #include <linux/netdevice.h> 142 #include <linux/inet.h> 143 #include <linux/inetdevice.h> 144 #include <linux/rtnetlink.h> 145 #include <linux/if_arp.h> 146 #include <linux/if_vlan.h> 147 #include <linux/in.h> 148 #include <linux/ip.h> 149 #include <linux/ipv6.h> 150 #include <linux/udp.h> 151 #include <linux/proc_fs.h> 152 #include <linux/seq_file.h> 153 #include <linux/wait.h> 154 #include <linux/etherdevice.h> 155 #include <linux/kthread.h> 156 #include <net/net_namespace.h> 157 #include <net/checksum.h> 158 #include <net/ipv6.h> 159 #include <net/addrconf.h> 160 #ifdef CONFIG_XFRM 161 #include <net/xfrm.h> 162 #endif 163 #include <asm/byteorder.h> 164 #include <linux/rcupdate.h> 165 #include <linux/bitops.h> 166 #include <linux/io.h> 167 #include <linux/timex.h> 168 #include <linux/uaccess.h> 169 #include <asm/dma.h> 170 #include <asm/div64.h> /* do_div */ 171 172 #define VERSION "2.72" 173 #define IP_NAME_SZ 32 174 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */ 175 #define MPLS_STACK_BOTTOM htonl(0x00000100) 176 177 /* Device flag bits */ 178 #define F_IPSRC_RND (1<<0) /* IP-Src Random */ 179 #define F_IPDST_RND (1<<1) /* IP-Dst Random */ 180 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */ 181 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */ 182 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */ 183 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */ 184 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */ 185 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */ 186 #define F_MPLS_RND (1<<8) /* Random MPLS labels */ 187 #define F_VID_RND (1<<9) /* Random VLAN ID */ 188 #define F_SVID_RND (1<<10) /* Random SVLAN ID */ 189 #define F_FLOW_SEQ (1<<11) /* Sequential flows */ 190 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */ 191 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */ 192 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */ 193 194 /* Thread control flag bits */ 195 #define T_STOP (1<<0) /* Stop run */ 196 #define T_RUN (1<<1) /* Start run */ 197 #define T_REMDEVALL (1<<2) /* Remove all devs */ 198 #define T_REMDEV (1<<3) /* Remove one dev */ 199 200 /* If lock -- can be removed after some work */ 201 #define if_lock(t) spin_lock(&(t->if_lock)); 202 #define if_unlock(t) spin_unlock(&(t->if_lock)); 203 204 /* Used to help with determining the pkts on receive */ 205 #define PKTGEN_MAGIC 0xbe9be955 206 #define PG_PROC_DIR "pktgen" 207 #define PGCTRL "pgctrl" 208 static struct proc_dir_entry *pg_proc_dir; 209 210 #define MAX_CFLOWS 65536 211 212 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4) 213 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4) 214 215 struct flow_state { 216 __be32 cur_daddr; 217 int count; 218 #ifdef CONFIG_XFRM 219 struct xfrm_state *x; 220 #endif 221 __u32 flags; 222 }; 223 224 /* flow flag bits */ 225 #define F_INIT (1<<0) /* flow has been initialized */ 226 227 struct pktgen_dev { 228 /* 229 * Try to keep frequent/infrequent used vars. separated. 230 */ 231 struct proc_dir_entry *entry; /* proc file */ 232 struct pktgen_thread *pg_thread;/* the owner */ 233 struct list_head list; /* chaining in the thread's run-queue */ 234 235 int running; /* if false, the test will stop */ 236 237 /* If min != max, then we will either do a linear iteration, or 238 * we will do a random selection from within the range. 239 */ 240 __u32 flags; 241 int removal_mark; /* non-zero => the device is marked for 242 * removal by worker thread */ 243 244 int min_pkt_size; /* = ETH_ZLEN; */ 245 int max_pkt_size; /* = ETH_ZLEN; */ 246 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */ 247 int nfrags; 248 u64 delay; /* nano-seconds */ 249 250 __u64 count; /* Default No packets to send */ 251 __u64 sofar; /* How many pkts we've sent so far */ 252 __u64 tx_bytes; /* How many bytes we've transmitted */ 253 __u64 errors; /* Errors when trying to transmit, 254 pkts will be re-sent */ 255 256 /* runtime counters relating to clone_skb */ 257 258 __u64 allocated_skbs; 259 __u32 clone_count; 260 int last_ok; /* Was last skb sent? 261 * Or a failed transmit of some sort? 262 * This will keep sequence numbers in order 263 */ 264 ktime_t next_tx; 265 ktime_t started_at; 266 ktime_t stopped_at; 267 u64 idle_acc; /* nano-seconds */ 268 269 __u32 seq_num; 270 271 int clone_skb; /* 272 * Use multiple SKBs during packet gen. 273 * If this number is greater than 1, then 274 * that many copies of the same packet will be 275 * sent before a new packet is allocated. 276 * If you want to send 1024 identical packets 277 * before creating a new packet, 278 * set clone_skb to 1024. 279 */ 280 281 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 282 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 283 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 284 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 285 286 struct in6_addr in6_saddr; 287 struct in6_addr in6_daddr; 288 struct in6_addr cur_in6_daddr; 289 struct in6_addr cur_in6_saddr; 290 /* For ranges */ 291 struct in6_addr min_in6_daddr; 292 struct in6_addr max_in6_daddr; 293 struct in6_addr min_in6_saddr; 294 struct in6_addr max_in6_saddr; 295 296 /* If we're doing ranges, random or incremental, then this 297 * defines the min/max for those ranges. 298 */ 299 __be32 saddr_min; /* inclusive, source IP address */ 300 __be32 saddr_max; /* exclusive, source IP address */ 301 __be32 daddr_min; /* inclusive, dest IP address */ 302 __be32 daddr_max; /* exclusive, dest IP address */ 303 304 __u16 udp_src_min; /* inclusive, source UDP port */ 305 __u16 udp_src_max; /* exclusive, source UDP port */ 306 __u16 udp_dst_min; /* inclusive, dest UDP port */ 307 __u16 udp_dst_max; /* exclusive, dest UDP port */ 308 309 /* DSCP + ECN */ 310 __u8 tos; /* six MSB of (former) IPv4 TOS 311 are for dscp codepoint */ 312 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 313 (see RFC 3260, sec. 4) */ 314 315 /* MPLS */ 316 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */ 317 __be32 labels[MAX_MPLS_LABELS]; 318 319 /* VLAN/SVLAN (802.1Q/Q-in-Q) */ 320 __u8 vlan_p; 321 __u8 vlan_cfi; 322 __u16 vlan_id; /* 0xffff means no vlan tag */ 323 324 __u8 svlan_p; 325 __u8 svlan_cfi; 326 __u16 svlan_id; /* 0xffff means no svlan tag */ 327 328 __u32 src_mac_count; /* How many MACs to iterate through */ 329 __u32 dst_mac_count; /* How many MACs to iterate through */ 330 331 unsigned char dst_mac[ETH_ALEN]; 332 unsigned char src_mac[ETH_ALEN]; 333 334 __u32 cur_dst_mac_offset; 335 __u32 cur_src_mac_offset; 336 __be32 cur_saddr; 337 __be32 cur_daddr; 338 __u16 ip_id; 339 __u16 cur_udp_dst; 340 __u16 cur_udp_src; 341 __u16 cur_queue_map; 342 __u32 cur_pkt_size; 343 __u32 last_pkt_size; 344 345 __u8 hh[14]; 346 /* = { 347 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, 348 349 We fill in SRC address later 350 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 351 0x08, 0x00 352 }; 353 */ 354 __u16 pad; /* pad out the hh struct to an even 16 bytes */ 355 356 struct sk_buff *skb; /* skb we are to transmit next, used for when we 357 * are transmitting the same one multiple times 358 */ 359 struct net_device *odev; /* The out-going device. 360 * Note that the device should have it's 361 * pg_info pointer pointing back to this 362 * device. 363 * Set when the user specifies the out-going 364 * device name (not when the inject is 365 * started as it used to do.) 366 */ 367 char odevname[32]; 368 struct flow_state *flows; 369 unsigned cflows; /* Concurrent flows (config) */ 370 unsigned lflow; /* Flow length (config) */ 371 unsigned nflows; /* accumulated flows (stats) */ 372 unsigned curfl; /* current sequenced flow (state)*/ 373 374 u16 queue_map_min; 375 u16 queue_map_max; 376 377 #ifdef CONFIG_XFRM 378 __u8 ipsmode; /* IPSEC mode (config) */ 379 __u8 ipsproto; /* IPSEC type (config) */ 380 #endif 381 char result[512]; 382 }; 383 384 struct pktgen_hdr { 385 __be32 pgh_magic; 386 __be32 seq_num; 387 __be32 tv_sec; 388 __be32 tv_usec; 389 }; 390 391 struct pktgen_thread { 392 spinlock_t if_lock; /* for list of devices */ 393 struct list_head if_list; /* All device here */ 394 struct list_head th_list; 395 struct task_struct *tsk; 396 char result[512]; 397 398 /* Field for thread to receive "posted" events terminate, 399 stop ifs etc. */ 400 401 u32 control; 402 int cpu; 403 404 wait_queue_head_t queue; 405 struct completion start_done; 406 }; 407 408 #define REMOVE 1 409 #define FIND 0 410 411 static inline ktime_t ktime_now(void) 412 { 413 struct timespec ts; 414 ktime_get_ts(&ts); 415 416 return timespec_to_ktime(ts); 417 } 418 419 /* This works even if 32 bit because of careful byte order choice */ 420 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2) 421 { 422 return cmp1.tv64 < cmp2.tv64; 423 } 424 425 static const char version[] = 426 "pktgen " VERSION ": Packet Generator for packet performance testing.\n"; 427 428 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i); 429 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname); 430 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 431 const char *ifname, bool exact); 432 static int pktgen_device_event(struct notifier_block *, unsigned long, void *); 433 static void pktgen_run_all_threads(void); 434 static void pktgen_reset_all_threads(void); 435 static void pktgen_stop_all_threads_ifs(void); 436 437 static void pktgen_stop(struct pktgen_thread *t); 438 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); 439 440 static unsigned int scan_ip6(const char *s, char ip[16]); 441 static unsigned int fmt_ip6(char *s, const char ip[16]); 442 443 /* Module parameters, defaults. */ 444 static int pg_count_d __read_mostly = 1000; 445 static int pg_delay_d __read_mostly; 446 static int pg_clone_skb_d __read_mostly; 447 static int debug __read_mostly; 448 449 static DEFINE_MUTEX(pktgen_thread_lock); 450 static LIST_HEAD(pktgen_threads); 451 452 static struct notifier_block pktgen_notifier_block = { 453 .notifier_call = pktgen_device_event, 454 }; 455 456 /* 457 * /proc handling functions 458 * 459 */ 460 461 static int pgctrl_show(struct seq_file *seq, void *v) 462 { 463 seq_puts(seq, version); 464 return 0; 465 } 466 467 static ssize_t pgctrl_write(struct file *file, const char __user *buf, 468 size_t count, loff_t *ppos) 469 { 470 int err = 0; 471 char data[128]; 472 473 if (!capable(CAP_NET_ADMIN)) { 474 err = -EPERM; 475 goto out; 476 } 477 478 if (count > sizeof(data)) 479 count = sizeof(data); 480 481 if (copy_from_user(data, buf, count)) { 482 err = -EFAULT; 483 goto out; 484 } 485 data[count - 1] = 0; /* Make string */ 486 487 if (!strcmp(data, "stop")) 488 pktgen_stop_all_threads_ifs(); 489 490 else if (!strcmp(data, "start")) 491 pktgen_run_all_threads(); 492 493 else if (!strcmp(data, "reset")) 494 pktgen_reset_all_threads(); 495 496 else 497 printk(KERN_WARNING "pktgen: Unknown command: %s\n", data); 498 499 err = count; 500 501 out: 502 return err; 503 } 504 505 static int pgctrl_open(struct inode *inode, struct file *file) 506 { 507 return single_open(file, pgctrl_show, PDE(inode)->data); 508 } 509 510 static const struct file_operations pktgen_fops = { 511 .owner = THIS_MODULE, 512 .open = pgctrl_open, 513 .read = seq_read, 514 .llseek = seq_lseek, 515 .write = pgctrl_write, 516 .release = single_release, 517 }; 518 519 static int pktgen_if_show(struct seq_file *seq, void *v) 520 { 521 const struct pktgen_dev *pkt_dev = seq->private; 522 ktime_t stopped; 523 u64 idle; 524 525 seq_printf(seq, 526 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", 527 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, 528 pkt_dev->max_pkt_size); 529 530 seq_printf(seq, 531 " frags: %d delay: %llu clone_skb: %d ifname: %s\n", 532 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay, 533 pkt_dev->clone_skb, pkt_dev->odevname); 534 535 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, 536 pkt_dev->lflow); 537 538 seq_printf(seq, 539 " queue_map_min: %u queue_map_max: %u\n", 540 pkt_dev->queue_map_min, 541 pkt_dev->queue_map_max); 542 543 if (pkt_dev->flags & F_IPV6) { 544 char b1[128], b2[128], b3[128]; 545 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr); 546 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr); 547 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr); 548 seq_printf(seq, 549 " saddr: %s min_saddr: %s max_saddr: %s\n", b1, 550 b2, b3); 551 552 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr); 553 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr); 554 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr); 555 seq_printf(seq, 556 " daddr: %s min_daddr: %s max_daddr: %s\n", b1, 557 b2, b3); 558 559 } else { 560 seq_printf(seq, 561 " dst_min: %s dst_max: %s\n", 562 pkt_dev->dst_min, pkt_dev->dst_max); 563 seq_printf(seq, 564 " src_min: %s src_max: %s\n", 565 pkt_dev->src_min, pkt_dev->src_max); 566 } 567 568 seq_puts(seq, " src_mac: "); 569 570 seq_printf(seq, "%pM ", 571 is_zero_ether_addr(pkt_dev->src_mac) ? 572 pkt_dev->odev->dev_addr : pkt_dev->src_mac); 573 574 seq_printf(seq, "dst_mac: "); 575 seq_printf(seq, "%pM\n", pkt_dev->dst_mac); 576 577 seq_printf(seq, 578 " udp_src_min: %d udp_src_max: %d" 579 " udp_dst_min: %d udp_dst_max: %d\n", 580 pkt_dev->udp_src_min, pkt_dev->udp_src_max, 581 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); 582 583 seq_printf(seq, 584 " src_mac_count: %d dst_mac_count: %d\n", 585 pkt_dev->src_mac_count, pkt_dev->dst_mac_count); 586 587 if (pkt_dev->nr_labels) { 588 unsigned i; 589 seq_printf(seq, " mpls: "); 590 for (i = 0; i < pkt_dev->nr_labels; i++) 591 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), 592 i == pkt_dev->nr_labels-1 ? "\n" : ", "); 593 } 594 595 if (pkt_dev->vlan_id != 0xffff) 596 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", 597 pkt_dev->vlan_id, pkt_dev->vlan_p, 598 pkt_dev->vlan_cfi); 599 600 if (pkt_dev->svlan_id != 0xffff) 601 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", 602 pkt_dev->svlan_id, pkt_dev->svlan_p, 603 pkt_dev->svlan_cfi); 604 605 if (pkt_dev->tos) 606 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); 607 608 if (pkt_dev->traffic_class) 609 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); 610 611 seq_printf(seq, " Flags: "); 612 613 if (pkt_dev->flags & F_IPV6) 614 seq_printf(seq, "IPV6 "); 615 616 if (pkt_dev->flags & F_IPSRC_RND) 617 seq_printf(seq, "IPSRC_RND "); 618 619 if (pkt_dev->flags & F_IPDST_RND) 620 seq_printf(seq, "IPDST_RND "); 621 622 if (pkt_dev->flags & F_TXSIZE_RND) 623 seq_printf(seq, "TXSIZE_RND "); 624 625 if (pkt_dev->flags & F_UDPSRC_RND) 626 seq_printf(seq, "UDPSRC_RND "); 627 628 if (pkt_dev->flags & F_UDPDST_RND) 629 seq_printf(seq, "UDPDST_RND "); 630 631 if (pkt_dev->flags & F_MPLS_RND) 632 seq_printf(seq, "MPLS_RND "); 633 634 if (pkt_dev->flags & F_QUEUE_MAP_RND) 635 seq_printf(seq, "QUEUE_MAP_RND "); 636 637 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 638 seq_printf(seq, "QUEUE_MAP_CPU "); 639 640 if (pkt_dev->cflows) { 641 if (pkt_dev->flags & F_FLOW_SEQ) 642 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/ 643 else 644 seq_printf(seq, "FLOW_RND "); 645 } 646 647 #ifdef CONFIG_XFRM 648 if (pkt_dev->flags & F_IPSEC_ON) 649 seq_printf(seq, "IPSEC "); 650 #endif 651 652 if (pkt_dev->flags & F_MACSRC_RND) 653 seq_printf(seq, "MACSRC_RND "); 654 655 if (pkt_dev->flags & F_MACDST_RND) 656 seq_printf(seq, "MACDST_RND "); 657 658 if (pkt_dev->flags & F_VID_RND) 659 seq_printf(seq, "VID_RND "); 660 661 if (pkt_dev->flags & F_SVID_RND) 662 seq_printf(seq, "SVID_RND "); 663 664 seq_puts(seq, "\n"); 665 666 /* not really stopped, more like last-running-at */ 667 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at; 668 idle = pkt_dev->idle_acc; 669 do_div(idle, NSEC_PER_USEC); 670 671 seq_printf(seq, 672 "Current:\n pkts-sofar: %llu errors: %llu\n", 673 (unsigned long long)pkt_dev->sofar, 674 (unsigned long long)pkt_dev->errors); 675 676 seq_printf(seq, 677 " started: %lluus stopped: %lluus idle: %lluus\n", 678 (unsigned long long) ktime_to_us(pkt_dev->started_at), 679 (unsigned long long) ktime_to_us(stopped), 680 (unsigned long long) idle); 681 682 seq_printf(seq, 683 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 684 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, 685 pkt_dev->cur_src_mac_offset); 686 687 if (pkt_dev->flags & F_IPV6) { 688 char b1[128], b2[128]; 689 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr); 690 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr); 691 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1); 692 } else 693 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n", 694 pkt_dev->cur_saddr, pkt_dev->cur_daddr); 695 696 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", 697 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 698 699 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); 700 701 seq_printf(seq, " flows: %u\n", pkt_dev->nflows); 702 703 if (pkt_dev->result[0]) 704 seq_printf(seq, "Result: %s\n", pkt_dev->result); 705 else 706 seq_printf(seq, "Result: Idle\n"); 707 708 return 0; 709 } 710 711 712 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, 713 __u32 *num) 714 { 715 int i = 0; 716 *num = 0; 717 718 for (; i < maxlen; i++) { 719 char c; 720 *num <<= 4; 721 if (get_user(c, &user_buffer[i])) 722 return -EFAULT; 723 if ((c >= '0') && (c <= '9')) 724 *num |= c - '0'; 725 else if ((c >= 'a') && (c <= 'f')) 726 *num |= c - 'a' + 10; 727 else if ((c >= 'A') && (c <= 'F')) 728 *num |= c - 'A' + 10; 729 else 730 break; 731 } 732 return i; 733 } 734 735 static int count_trail_chars(const char __user * user_buffer, 736 unsigned int maxlen) 737 { 738 int i; 739 740 for (i = 0; i < maxlen; i++) { 741 char c; 742 if (get_user(c, &user_buffer[i])) 743 return -EFAULT; 744 switch (c) { 745 case '\"': 746 case '\n': 747 case '\r': 748 case '\t': 749 case ' ': 750 case '=': 751 break; 752 default: 753 goto done; 754 } 755 } 756 done: 757 return i; 758 } 759 760 static unsigned long num_arg(const char __user * user_buffer, 761 unsigned long maxlen, unsigned long *num) 762 { 763 int i = 0; 764 *num = 0; 765 766 for (; i < maxlen; i++) { 767 char c; 768 if (get_user(c, &user_buffer[i])) 769 return -EFAULT; 770 if ((c >= '0') && (c <= '9')) { 771 *num *= 10; 772 *num += c - '0'; 773 } else 774 break; 775 } 776 return i; 777 } 778 779 static int strn_len(const char __user * user_buffer, unsigned int maxlen) 780 { 781 int i = 0; 782 783 for (; i < maxlen; i++) { 784 char c; 785 if (get_user(c, &user_buffer[i])) 786 return -EFAULT; 787 switch (c) { 788 case '\"': 789 case '\n': 790 case '\r': 791 case '\t': 792 case ' ': 793 goto done_str; 794 break; 795 default: 796 break; 797 } 798 } 799 done_str: 800 return i; 801 } 802 803 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) 804 { 805 unsigned n = 0; 806 char c; 807 ssize_t i = 0; 808 int len; 809 810 pkt_dev->nr_labels = 0; 811 do { 812 __u32 tmp; 813 len = hex32_arg(&buffer[i], 8, &tmp); 814 if (len <= 0) 815 return len; 816 pkt_dev->labels[n] = htonl(tmp); 817 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 818 pkt_dev->flags |= F_MPLS_RND; 819 i += len; 820 if (get_user(c, &buffer[i])) 821 return -EFAULT; 822 i++; 823 n++; 824 if (n >= MAX_MPLS_LABELS) 825 return -E2BIG; 826 } while (c == ','); 827 828 pkt_dev->nr_labels = n; 829 return i; 830 } 831 832 static ssize_t pktgen_if_write(struct file *file, 833 const char __user * user_buffer, size_t count, 834 loff_t * offset) 835 { 836 struct seq_file *seq = (struct seq_file *)file->private_data; 837 struct pktgen_dev *pkt_dev = seq->private; 838 int i = 0, max, len; 839 char name[16], valstr[32]; 840 unsigned long value = 0; 841 char *pg_result = NULL; 842 int tmp = 0; 843 char buf[128]; 844 845 pg_result = &(pkt_dev->result[0]); 846 847 if (count < 1) { 848 printk(KERN_WARNING "pktgen: wrong command format\n"); 849 return -EINVAL; 850 } 851 852 max = count - i; 853 tmp = count_trail_chars(&user_buffer[i], max); 854 if (tmp < 0) { 855 printk(KERN_WARNING "pktgen: illegal format\n"); 856 return tmp; 857 } 858 i += tmp; 859 860 /* Read variable name */ 861 862 len = strn_len(&user_buffer[i], sizeof(name) - 1); 863 if (len < 0) 864 return len; 865 866 memset(name, 0, sizeof(name)); 867 if (copy_from_user(name, &user_buffer[i], len)) 868 return -EFAULT; 869 i += len; 870 871 max = count - i; 872 len = count_trail_chars(&user_buffer[i], max); 873 if (len < 0) 874 return len; 875 876 i += len; 877 878 if (debug) { 879 char tb[count + 1]; 880 if (copy_from_user(tb, user_buffer, count)) 881 return -EFAULT; 882 tb[count] = 0; 883 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name, 884 (unsigned long)count, tb); 885 } 886 887 if (!strcmp(name, "min_pkt_size")) { 888 len = num_arg(&user_buffer[i], 10, &value); 889 if (len < 0) 890 return len; 891 892 i += len; 893 if (value < 14 + 20 + 8) 894 value = 14 + 20 + 8; 895 if (value != pkt_dev->min_pkt_size) { 896 pkt_dev->min_pkt_size = value; 897 pkt_dev->cur_pkt_size = value; 898 } 899 sprintf(pg_result, "OK: min_pkt_size=%u", 900 pkt_dev->min_pkt_size); 901 return count; 902 } 903 904 if (!strcmp(name, "max_pkt_size")) { 905 len = num_arg(&user_buffer[i], 10, &value); 906 if (len < 0) 907 return len; 908 909 i += len; 910 if (value < 14 + 20 + 8) 911 value = 14 + 20 + 8; 912 if (value != pkt_dev->max_pkt_size) { 913 pkt_dev->max_pkt_size = value; 914 pkt_dev->cur_pkt_size = value; 915 } 916 sprintf(pg_result, "OK: max_pkt_size=%u", 917 pkt_dev->max_pkt_size); 918 return count; 919 } 920 921 /* Shortcut for min = max */ 922 923 if (!strcmp(name, "pkt_size")) { 924 len = num_arg(&user_buffer[i], 10, &value); 925 if (len < 0) 926 return len; 927 928 i += len; 929 if (value < 14 + 20 + 8) 930 value = 14 + 20 + 8; 931 if (value != pkt_dev->min_pkt_size) { 932 pkt_dev->min_pkt_size = value; 933 pkt_dev->max_pkt_size = value; 934 pkt_dev->cur_pkt_size = value; 935 } 936 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 937 return count; 938 } 939 940 if (!strcmp(name, "debug")) { 941 len = num_arg(&user_buffer[i], 10, &value); 942 if (len < 0) 943 return len; 944 945 i += len; 946 debug = value; 947 sprintf(pg_result, "OK: debug=%u", debug); 948 return count; 949 } 950 951 if (!strcmp(name, "frags")) { 952 len = num_arg(&user_buffer[i], 10, &value); 953 if (len < 0) 954 return len; 955 956 i += len; 957 pkt_dev->nfrags = value; 958 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 959 return count; 960 } 961 if (!strcmp(name, "delay")) { 962 len = num_arg(&user_buffer[i], 10, &value); 963 if (len < 0) 964 return len; 965 966 i += len; 967 if (value == 0x7FFFFFFF) 968 pkt_dev->delay = ULLONG_MAX; 969 else 970 pkt_dev->delay = (u64)value; 971 972 sprintf(pg_result, "OK: delay=%llu", 973 (unsigned long long) pkt_dev->delay); 974 return count; 975 } 976 if (!strcmp(name, "udp_src_min")) { 977 len = num_arg(&user_buffer[i], 10, &value); 978 if (len < 0) 979 return len; 980 981 i += len; 982 if (value != pkt_dev->udp_src_min) { 983 pkt_dev->udp_src_min = value; 984 pkt_dev->cur_udp_src = value; 985 } 986 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 987 return count; 988 } 989 if (!strcmp(name, "udp_dst_min")) { 990 len = num_arg(&user_buffer[i], 10, &value); 991 if (len < 0) 992 return len; 993 994 i += len; 995 if (value != pkt_dev->udp_dst_min) { 996 pkt_dev->udp_dst_min = value; 997 pkt_dev->cur_udp_dst = value; 998 } 999 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 1000 return count; 1001 } 1002 if (!strcmp(name, "udp_src_max")) { 1003 len = num_arg(&user_buffer[i], 10, &value); 1004 if (len < 0) 1005 return len; 1006 1007 i += len; 1008 if (value != pkt_dev->udp_src_max) { 1009 pkt_dev->udp_src_max = value; 1010 pkt_dev->cur_udp_src = value; 1011 } 1012 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 1013 return count; 1014 } 1015 if (!strcmp(name, "udp_dst_max")) { 1016 len = num_arg(&user_buffer[i], 10, &value); 1017 if (len < 0) 1018 return len; 1019 1020 i += len; 1021 if (value != pkt_dev->udp_dst_max) { 1022 pkt_dev->udp_dst_max = value; 1023 pkt_dev->cur_udp_dst = value; 1024 } 1025 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1026 return count; 1027 } 1028 if (!strcmp(name, "clone_skb")) { 1029 len = num_arg(&user_buffer[i], 10, &value); 1030 if (len < 0) 1031 return len; 1032 1033 i += len; 1034 pkt_dev->clone_skb = value; 1035 1036 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1037 return count; 1038 } 1039 if (!strcmp(name, "count")) { 1040 len = num_arg(&user_buffer[i], 10, &value); 1041 if (len < 0) 1042 return len; 1043 1044 i += len; 1045 pkt_dev->count = value; 1046 sprintf(pg_result, "OK: count=%llu", 1047 (unsigned long long)pkt_dev->count); 1048 return count; 1049 } 1050 if (!strcmp(name, "src_mac_count")) { 1051 len = num_arg(&user_buffer[i], 10, &value); 1052 if (len < 0) 1053 return len; 1054 1055 i += len; 1056 if (pkt_dev->src_mac_count != value) { 1057 pkt_dev->src_mac_count = value; 1058 pkt_dev->cur_src_mac_offset = 0; 1059 } 1060 sprintf(pg_result, "OK: src_mac_count=%d", 1061 pkt_dev->src_mac_count); 1062 return count; 1063 } 1064 if (!strcmp(name, "dst_mac_count")) { 1065 len = num_arg(&user_buffer[i], 10, &value); 1066 if (len < 0) 1067 return len; 1068 1069 i += len; 1070 if (pkt_dev->dst_mac_count != value) { 1071 pkt_dev->dst_mac_count = value; 1072 pkt_dev->cur_dst_mac_offset = 0; 1073 } 1074 sprintf(pg_result, "OK: dst_mac_count=%d", 1075 pkt_dev->dst_mac_count); 1076 return count; 1077 } 1078 if (!strcmp(name, "flag")) { 1079 char f[32]; 1080 memset(f, 0, 32); 1081 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1082 if (len < 0) 1083 return len; 1084 1085 if (copy_from_user(f, &user_buffer[i], len)) 1086 return -EFAULT; 1087 i += len; 1088 if (strcmp(f, "IPSRC_RND") == 0) 1089 pkt_dev->flags |= F_IPSRC_RND; 1090 1091 else if (strcmp(f, "!IPSRC_RND") == 0) 1092 pkt_dev->flags &= ~F_IPSRC_RND; 1093 1094 else if (strcmp(f, "TXSIZE_RND") == 0) 1095 pkt_dev->flags |= F_TXSIZE_RND; 1096 1097 else if (strcmp(f, "!TXSIZE_RND") == 0) 1098 pkt_dev->flags &= ~F_TXSIZE_RND; 1099 1100 else if (strcmp(f, "IPDST_RND") == 0) 1101 pkt_dev->flags |= F_IPDST_RND; 1102 1103 else if (strcmp(f, "!IPDST_RND") == 0) 1104 pkt_dev->flags &= ~F_IPDST_RND; 1105 1106 else if (strcmp(f, "UDPSRC_RND") == 0) 1107 pkt_dev->flags |= F_UDPSRC_RND; 1108 1109 else if (strcmp(f, "!UDPSRC_RND") == 0) 1110 pkt_dev->flags &= ~F_UDPSRC_RND; 1111 1112 else if (strcmp(f, "UDPDST_RND") == 0) 1113 pkt_dev->flags |= F_UDPDST_RND; 1114 1115 else if (strcmp(f, "!UDPDST_RND") == 0) 1116 pkt_dev->flags &= ~F_UDPDST_RND; 1117 1118 else if (strcmp(f, "MACSRC_RND") == 0) 1119 pkt_dev->flags |= F_MACSRC_RND; 1120 1121 else if (strcmp(f, "!MACSRC_RND") == 0) 1122 pkt_dev->flags &= ~F_MACSRC_RND; 1123 1124 else if (strcmp(f, "MACDST_RND") == 0) 1125 pkt_dev->flags |= F_MACDST_RND; 1126 1127 else if (strcmp(f, "!MACDST_RND") == 0) 1128 pkt_dev->flags &= ~F_MACDST_RND; 1129 1130 else if (strcmp(f, "MPLS_RND") == 0) 1131 pkt_dev->flags |= F_MPLS_RND; 1132 1133 else if (strcmp(f, "!MPLS_RND") == 0) 1134 pkt_dev->flags &= ~F_MPLS_RND; 1135 1136 else if (strcmp(f, "VID_RND") == 0) 1137 pkt_dev->flags |= F_VID_RND; 1138 1139 else if (strcmp(f, "!VID_RND") == 0) 1140 pkt_dev->flags &= ~F_VID_RND; 1141 1142 else if (strcmp(f, "SVID_RND") == 0) 1143 pkt_dev->flags |= F_SVID_RND; 1144 1145 else if (strcmp(f, "!SVID_RND") == 0) 1146 pkt_dev->flags &= ~F_SVID_RND; 1147 1148 else if (strcmp(f, "FLOW_SEQ") == 0) 1149 pkt_dev->flags |= F_FLOW_SEQ; 1150 1151 else if (strcmp(f, "QUEUE_MAP_RND") == 0) 1152 pkt_dev->flags |= F_QUEUE_MAP_RND; 1153 1154 else if (strcmp(f, "!QUEUE_MAP_RND") == 0) 1155 pkt_dev->flags &= ~F_QUEUE_MAP_RND; 1156 1157 else if (strcmp(f, "QUEUE_MAP_CPU") == 0) 1158 pkt_dev->flags |= F_QUEUE_MAP_CPU; 1159 1160 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0) 1161 pkt_dev->flags &= ~F_QUEUE_MAP_CPU; 1162 #ifdef CONFIG_XFRM 1163 else if (strcmp(f, "IPSEC") == 0) 1164 pkt_dev->flags |= F_IPSEC_ON; 1165 #endif 1166 1167 else if (strcmp(f, "!IPV6") == 0) 1168 pkt_dev->flags &= ~F_IPV6; 1169 1170 else { 1171 sprintf(pg_result, 1172 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1173 f, 1174 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1175 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC\n"); 1176 return count; 1177 } 1178 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1179 return count; 1180 } 1181 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1182 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1183 if (len < 0) 1184 return len; 1185 1186 if (copy_from_user(buf, &user_buffer[i], len)) 1187 return -EFAULT; 1188 buf[len] = 0; 1189 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1190 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1191 strncpy(pkt_dev->dst_min, buf, len); 1192 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1193 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1194 } 1195 if (debug) 1196 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n", 1197 pkt_dev->dst_min); 1198 i += len; 1199 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1200 return count; 1201 } 1202 if (!strcmp(name, "dst_max")) { 1203 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1204 if (len < 0) 1205 return len; 1206 1207 1208 if (copy_from_user(buf, &user_buffer[i], len)) 1209 return -EFAULT; 1210 1211 buf[len] = 0; 1212 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1213 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1214 strncpy(pkt_dev->dst_max, buf, len); 1215 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1216 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1217 } 1218 if (debug) 1219 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n", 1220 pkt_dev->dst_max); 1221 i += len; 1222 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1223 return count; 1224 } 1225 if (!strcmp(name, "dst6")) { 1226 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1227 if (len < 0) 1228 return len; 1229 1230 pkt_dev->flags |= F_IPV6; 1231 1232 if (copy_from_user(buf, &user_buffer[i], len)) 1233 return -EFAULT; 1234 buf[len] = 0; 1235 1236 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1237 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1238 1239 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr); 1240 1241 if (debug) 1242 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf); 1243 1244 i += len; 1245 sprintf(pg_result, "OK: dst6=%s", buf); 1246 return count; 1247 } 1248 if (!strcmp(name, "dst6_min")) { 1249 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1250 if (len < 0) 1251 return len; 1252 1253 pkt_dev->flags |= F_IPV6; 1254 1255 if (copy_from_user(buf, &user_buffer[i], len)) 1256 return -EFAULT; 1257 buf[len] = 0; 1258 1259 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1260 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1261 1262 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, 1263 &pkt_dev->min_in6_daddr); 1264 if (debug) 1265 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf); 1266 1267 i += len; 1268 sprintf(pg_result, "OK: dst6_min=%s", buf); 1269 return count; 1270 } 1271 if (!strcmp(name, "dst6_max")) { 1272 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1273 if (len < 0) 1274 return len; 1275 1276 pkt_dev->flags |= F_IPV6; 1277 1278 if (copy_from_user(buf, &user_buffer[i], len)) 1279 return -EFAULT; 1280 buf[len] = 0; 1281 1282 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1283 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1284 1285 if (debug) 1286 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf); 1287 1288 i += len; 1289 sprintf(pg_result, "OK: dst6_max=%s", buf); 1290 return count; 1291 } 1292 if (!strcmp(name, "src6")) { 1293 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1294 if (len < 0) 1295 return len; 1296 1297 pkt_dev->flags |= F_IPV6; 1298 1299 if (copy_from_user(buf, &user_buffer[i], len)) 1300 return -EFAULT; 1301 buf[len] = 0; 1302 1303 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1304 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1305 1306 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr); 1307 1308 if (debug) 1309 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf); 1310 1311 i += len; 1312 sprintf(pg_result, "OK: src6=%s", buf); 1313 return count; 1314 } 1315 if (!strcmp(name, "src_min")) { 1316 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1317 if (len < 0) 1318 return len; 1319 1320 if (copy_from_user(buf, &user_buffer[i], len)) 1321 return -EFAULT; 1322 buf[len] = 0; 1323 if (strcmp(buf, pkt_dev->src_min) != 0) { 1324 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1325 strncpy(pkt_dev->src_min, buf, len); 1326 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1327 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1328 } 1329 if (debug) 1330 printk(KERN_DEBUG "pktgen: src_min set to: %s\n", 1331 pkt_dev->src_min); 1332 i += len; 1333 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1334 return count; 1335 } 1336 if (!strcmp(name, "src_max")) { 1337 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1338 if (len < 0) 1339 return len; 1340 1341 if (copy_from_user(buf, &user_buffer[i], len)) 1342 return -EFAULT; 1343 buf[len] = 0; 1344 if (strcmp(buf, pkt_dev->src_max) != 0) { 1345 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1346 strncpy(pkt_dev->src_max, buf, len); 1347 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1348 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1349 } 1350 if (debug) 1351 printk(KERN_DEBUG "pktgen: src_max set to: %s\n", 1352 pkt_dev->src_max); 1353 i += len; 1354 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1355 return count; 1356 } 1357 if (!strcmp(name, "dst_mac")) { 1358 char *v = valstr; 1359 unsigned char old_dmac[ETH_ALEN]; 1360 unsigned char *m = pkt_dev->dst_mac; 1361 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN); 1362 1363 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1364 if (len < 0) 1365 return len; 1366 1367 memset(valstr, 0, sizeof(valstr)); 1368 if (copy_from_user(valstr, &user_buffer[i], len)) 1369 return -EFAULT; 1370 i += len; 1371 1372 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) { 1373 if (*v >= '0' && *v <= '9') { 1374 *m *= 16; 1375 *m += *v - '0'; 1376 } 1377 if (*v >= 'A' && *v <= 'F') { 1378 *m *= 16; 1379 *m += *v - 'A' + 10; 1380 } 1381 if (*v >= 'a' && *v <= 'f') { 1382 *m *= 16; 1383 *m += *v - 'a' + 10; 1384 } 1385 if (*v == ':') { 1386 m++; 1387 *m = 0; 1388 } 1389 } 1390 1391 /* Set up Dest MAC */ 1392 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac)) 1393 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 1394 1395 sprintf(pg_result, "OK: dstmac"); 1396 return count; 1397 } 1398 if (!strcmp(name, "src_mac")) { 1399 char *v = valstr; 1400 unsigned char old_smac[ETH_ALEN]; 1401 unsigned char *m = pkt_dev->src_mac; 1402 1403 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN); 1404 1405 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1406 if (len < 0) 1407 return len; 1408 1409 memset(valstr, 0, sizeof(valstr)); 1410 if (copy_from_user(valstr, &user_buffer[i], len)) 1411 return -EFAULT; 1412 i += len; 1413 1414 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) { 1415 if (*v >= '0' && *v <= '9') { 1416 *m *= 16; 1417 *m += *v - '0'; 1418 } 1419 if (*v >= 'A' && *v <= 'F') { 1420 *m *= 16; 1421 *m += *v - 'A' + 10; 1422 } 1423 if (*v >= 'a' && *v <= 'f') { 1424 *m *= 16; 1425 *m += *v - 'a' + 10; 1426 } 1427 if (*v == ':') { 1428 m++; 1429 *m = 0; 1430 } 1431 } 1432 1433 /* Set up Src MAC */ 1434 if (compare_ether_addr(old_smac, pkt_dev->src_mac)) 1435 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN); 1436 1437 sprintf(pg_result, "OK: srcmac"); 1438 return count; 1439 } 1440 1441 if (!strcmp(name, "clear_counters")) { 1442 pktgen_clear_counters(pkt_dev); 1443 sprintf(pg_result, "OK: Clearing counters.\n"); 1444 return count; 1445 } 1446 1447 if (!strcmp(name, "flows")) { 1448 len = num_arg(&user_buffer[i], 10, &value); 1449 if (len < 0) 1450 return len; 1451 1452 i += len; 1453 if (value > MAX_CFLOWS) 1454 value = MAX_CFLOWS; 1455 1456 pkt_dev->cflows = value; 1457 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1458 return count; 1459 } 1460 1461 if (!strcmp(name, "flowlen")) { 1462 len = num_arg(&user_buffer[i], 10, &value); 1463 if (len < 0) 1464 return len; 1465 1466 i += len; 1467 pkt_dev->lflow = value; 1468 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1469 return count; 1470 } 1471 1472 if (!strcmp(name, "queue_map_min")) { 1473 len = num_arg(&user_buffer[i], 5, &value); 1474 if (len < 0) 1475 return len; 1476 1477 i += len; 1478 pkt_dev->queue_map_min = value; 1479 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1480 return count; 1481 } 1482 1483 if (!strcmp(name, "queue_map_max")) { 1484 len = num_arg(&user_buffer[i], 5, &value); 1485 if (len < 0) 1486 return len; 1487 1488 i += len; 1489 pkt_dev->queue_map_max = value; 1490 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1491 return count; 1492 } 1493 1494 if (!strcmp(name, "mpls")) { 1495 unsigned n, cnt; 1496 1497 len = get_labels(&user_buffer[i], pkt_dev); 1498 if (len < 0) 1499 return len; 1500 i += len; 1501 cnt = sprintf(pg_result, "OK: mpls="); 1502 for (n = 0; n < pkt_dev->nr_labels; n++) 1503 cnt += sprintf(pg_result + cnt, 1504 "%08x%s", ntohl(pkt_dev->labels[n]), 1505 n == pkt_dev->nr_labels-1 ? "" : ","); 1506 1507 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1508 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1509 pkt_dev->svlan_id = 0xffff; 1510 1511 if (debug) 1512 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n"); 1513 } 1514 return count; 1515 } 1516 1517 if (!strcmp(name, "vlan_id")) { 1518 len = num_arg(&user_buffer[i], 4, &value); 1519 if (len < 0) 1520 return len; 1521 1522 i += len; 1523 if (value <= 4095) { 1524 pkt_dev->vlan_id = value; /* turn on VLAN */ 1525 1526 if (debug) 1527 printk(KERN_DEBUG "pktgen: VLAN turned on\n"); 1528 1529 if (debug && pkt_dev->nr_labels) 1530 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1531 1532 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1533 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1534 } else { 1535 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1536 pkt_dev->svlan_id = 0xffff; 1537 1538 if (debug) 1539 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1540 } 1541 return count; 1542 } 1543 1544 if (!strcmp(name, "vlan_p")) { 1545 len = num_arg(&user_buffer[i], 1, &value); 1546 if (len < 0) 1547 return len; 1548 1549 i += len; 1550 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1551 pkt_dev->vlan_p = value; 1552 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1553 } else { 1554 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1555 } 1556 return count; 1557 } 1558 1559 if (!strcmp(name, "vlan_cfi")) { 1560 len = num_arg(&user_buffer[i], 1, &value); 1561 if (len < 0) 1562 return len; 1563 1564 i += len; 1565 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1566 pkt_dev->vlan_cfi = value; 1567 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1568 } else { 1569 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1570 } 1571 return count; 1572 } 1573 1574 if (!strcmp(name, "svlan_id")) { 1575 len = num_arg(&user_buffer[i], 4, &value); 1576 if (len < 0) 1577 return len; 1578 1579 i += len; 1580 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1581 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1582 1583 if (debug) 1584 printk(KERN_DEBUG "pktgen: SVLAN turned on\n"); 1585 1586 if (debug && pkt_dev->nr_labels) 1587 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1588 1589 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1590 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1591 } else { 1592 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1593 pkt_dev->svlan_id = 0xffff; 1594 1595 if (debug) 1596 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1597 } 1598 return count; 1599 } 1600 1601 if (!strcmp(name, "svlan_p")) { 1602 len = num_arg(&user_buffer[i], 1, &value); 1603 if (len < 0) 1604 return len; 1605 1606 i += len; 1607 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1608 pkt_dev->svlan_p = value; 1609 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1610 } else { 1611 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1612 } 1613 return count; 1614 } 1615 1616 if (!strcmp(name, "svlan_cfi")) { 1617 len = num_arg(&user_buffer[i], 1, &value); 1618 if (len < 0) 1619 return len; 1620 1621 i += len; 1622 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1623 pkt_dev->svlan_cfi = value; 1624 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1625 } else { 1626 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1627 } 1628 return count; 1629 } 1630 1631 if (!strcmp(name, "tos")) { 1632 __u32 tmp_value = 0; 1633 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1634 if (len < 0) 1635 return len; 1636 1637 i += len; 1638 if (len == 2) { 1639 pkt_dev->tos = tmp_value; 1640 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1641 } else { 1642 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1643 } 1644 return count; 1645 } 1646 1647 if (!strcmp(name, "traffic_class")) { 1648 __u32 tmp_value = 0; 1649 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1650 if (len < 0) 1651 return len; 1652 1653 i += len; 1654 if (len == 2) { 1655 pkt_dev->traffic_class = tmp_value; 1656 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1657 } else { 1658 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1659 } 1660 return count; 1661 } 1662 1663 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1664 return -EINVAL; 1665 } 1666 1667 static int pktgen_if_open(struct inode *inode, struct file *file) 1668 { 1669 return single_open(file, pktgen_if_show, PDE(inode)->data); 1670 } 1671 1672 static const struct file_operations pktgen_if_fops = { 1673 .owner = THIS_MODULE, 1674 .open = pktgen_if_open, 1675 .read = seq_read, 1676 .llseek = seq_lseek, 1677 .write = pktgen_if_write, 1678 .release = single_release, 1679 }; 1680 1681 static int pktgen_thread_show(struct seq_file *seq, void *v) 1682 { 1683 struct pktgen_thread *t = seq->private; 1684 const struct pktgen_dev *pkt_dev; 1685 1686 BUG_ON(!t); 1687 1688 seq_printf(seq, "Running: "); 1689 1690 if_lock(t); 1691 list_for_each_entry(pkt_dev, &t->if_list, list) 1692 if (pkt_dev->running) 1693 seq_printf(seq, "%s ", pkt_dev->odevname); 1694 1695 seq_printf(seq, "\nStopped: "); 1696 1697 list_for_each_entry(pkt_dev, &t->if_list, list) 1698 if (!pkt_dev->running) 1699 seq_printf(seq, "%s ", pkt_dev->odevname); 1700 1701 if (t->result[0]) 1702 seq_printf(seq, "\nResult: %s\n", t->result); 1703 else 1704 seq_printf(seq, "\nResult: NA\n"); 1705 1706 if_unlock(t); 1707 1708 return 0; 1709 } 1710 1711 static ssize_t pktgen_thread_write(struct file *file, 1712 const char __user * user_buffer, 1713 size_t count, loff_t * offset) 1714 { 1715 struct seq_file *seq = (struct seq_file *)file->private_data; 1716 struct pktgen_thread *t = seq->private; 1717 int i = 0, max, len, ret; 1718 char name[40]; 1719 char *pg_result; 1720 1721 if (count < 1) { 1722 // sprintf(pg_result, "Wrong command format"); 1723 return -EINVAL; 1724 } 1725 1726 max = count - i; 1727 len = count_trail_chars(&user_buffer[i], max); 1728 if (len < 0) 1729 return len; 1730 1731 i += len; 1732 1733 /* Read variable name */ 1734 1735 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1736 if (len < 0) 1737 return len; 1738 1739 memset(name, 0, sizeof(name)); 1740 if (copy_from_user(name, &user_buffer[i], len)) 1741 return -EFAULT; 1742 i += len; 1743 1744 max = count - i; 1745 len = count_trail_chars(&user_buffer[i], max); 1746 if (len < 0) 1747 return len; 1748 1749 i += len; 1750 1751 if (debug) 1752 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n", 1753 name, (unsigned long)count); 1754 1755 if (!t) { 1756 printk(KERN_ERR "pktgen: ERROR: No thread\n"); 1757 ret = -EINVAL; 1758 goto out; 1759 } 1760 1761 pg_result = &(t->result[0]); 1762 1763 if (!strcmp(name, "add_device")) { 1764 char f[32]; 1765 memset(f, 0, 32); 1766 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1767 if (len < 0) { 1768 ret = len; 1769 goto out; 1770 } 1771 if (copy_from_user(f, &user_buffer[i], len)) 1772 return -EFAULT; 1773 i += len; 1774 mutex_lock(&pktgen_thread_lock); 1775 pktgen_add_device(t, f); 1776 mutex_unlock(&pktgen_thread_lock); 1777 ret = count; 1778 sprintf(pg_result, "OK: add_device=%s", f); 1779 goto out; 1780 } 1781 1782 if (!strcmp(name, "rem_device_all")) { 1783 mutex_lock(&pktgen_thread_lock); 1784 t->control |= T_REMDEVALL; 1785 mutex_unlock(&pktgen_thread_lock); 1786 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1787 ret = count; 1788 sprintf(pg_result, "OK: rem_device_all"); 1789 goto out; 1790 } 1791 1792 if (!strcmp(name, "max_before_softirq")) { 1793 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1794 ret = count; 1795 goto out; 1796 } 1797 1798 ret = -EINVAL; 1799 out: 1800 return ret; 1801 } 1802 1803 static int pktgen_thread_open(struct inode *inode, struct file *file) 1804 { 1805 return single_open(file, pktgen_thread_show, PDE(inode)->data); 1806 } 1807 1808 static const struct file_operations pktgen_thread_fops = { 1809 .owner = THIS_MODULE, 1810 .open = pktgen_thread_open, 1811 .read = seq_read, 1812 .llseek = seq_lseek, 1813 .write = pktgen_thread_write, 1814 .release = single_release, 1815 }; 1816 1817 /* Think find or remove for NN */ 1818 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove) 1819 { 1820 struct pktgen_thread *t; 1821 struct pktgen_dev *pkt_dev = NULL; 1822 bool exact = (remove == FIND); 1823 1824 list_for_each_entry(t, &pktgen_threads, th_list) { 1825 pkt_dev = pktgen_find_dev(t, ifname, exact); 1826 if (pkt_dev) { 1827 if (remove) { 1828 if_lock(t); 1829 pkt_dev->removal_mark = 1; 1830 t->control |= T_REMDEV; 1831 if_unlock(t); 1832 } 1833 break; 1834 } 1835 } 1836 return pkt_dev; 1837 } 1838 1839 /* 1840 * mark a device for removal 1841 */ 1842 static void pktgen_mark_device(const char *ifname) 1843 { 1844 struct pktgen_dev *pkt_dev = NULL; 1845 const int max_tries = 10, msec_per_try = 125; 1846 int i = 0; 1847 1848 mutex_lock(&pktgen_thread_lock); 1849 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname); 1850 1851 while (1) { 1852 1853 pkt_dev = __pktgen_NN_threads(ifname, REMOVE); 1854 if (pkt_dev == NULL) 1855 break; /* success */ 1856 1857 mutex_unlock(&pktgen_thread_lock); 1858 pr_debug("pktgen: pktgen_mark_device waiting for %s " 1859 "to disappear....\n", ifname); 1860 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1861 mutex_lock(&pktgen_thread_lock); 1862 1863 if (++i >= max_tries) { 1864 printk(KERN_ERR "pktgen_mark_device: timed out after " 1865 "waiting %d msec for device %s to be removed\n", 1866 msec_per_try * i, ifname); 1867 break; 1868 } 1869 1870 } 1871 1872 mutex_unlock(&pktgen_thread_lock); 1873 } 1874 1875 static void pktgen_change_name(struct net_device *dev) 1876 { 1877 struct pktgen_thread *t; 1878 1879 list_for_each_entry(t, &pktgen_threads, th_list) { 1880 struct pktgen_dev *pkt_dev; 1881 1882 list_for_each_entry(pkt_dev, &t->if_list, list) { 1883 if (pkt_dev->odev != dev) 1884 continue; 1885 1886 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 1887 1888 pkt_dev->entry = proc_create_data(dev->name, 0600, 1889 pg_proc_dir, 1890 &pktgen_if_fops, 1891 pkt_dev); 1892 if (!pkt_dev->entry) 1893 printk(KERN_ERR "pktgen: can't move proc " 1894 " entry for '%s'\n", dev->name); 1895 break; 1896 } 1897 } 1898 } 1899 1900 static int pktgen_device_event(struct notifier_block *unused, 1901 unsigned long event, void *ptr) 1902 { 1903 struct net_device *dev = ptr; 1904 1905 if (!net_eq(dev_net(dev), &init_net)) 1906 return NOTIFY_DONE; 1907 1908 /* It is OK that we do not hold the group lock right now, 1909 * as we run under the RTNL lock. 1910 */ 1911 1912 switch (event) { 1913 case NETDEV_CHANGENAME: 1914 pktgen_change_name(dev); 1915 break; 1916 1917 case NETDEV_UNREGISTER: 1918 pktgen_mark_device(dev->name); 1919 break; 1920 } 1921 1922 return NOTIFY_DONE; 1923 } 1924 1925 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev, 1926 const char *ifname) 1927 { 1928 char b[IFNAMSIZ+5]; 1929 int i = 0; 1930 1931 for (i = 0; ifname[i] != '@'; i++) { 1932 if (i == IFNAMSIZ) 1933 break; 1934 1935 b[i] = ifname[i]; 1936 } 1937 b[i] = 0; 1938 1939 return dev_get_by_name(&init_net, b); 1940 } 1941 1942 1943 /* Associate pktgen_dev with a device. */ 1944 1945 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname) 1946 { 1947 struct net_device *odev; 1948 int err; 1949 1950 /* Clean old setups */ 1951 if (pkt_dev->odev) { 1952 dev_put(pkt_dev->odev); 1953 pkt_dev->odev = NULL; 1954 } 1955 1956 odev = pktgen_dev_get_by_name(pkt_dev, ifname); 1957 if (!odev) { 1958 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname); 1959 return -ENODEV; 1960 } 1961 1962 if (odev->type != ARPHRD_ETHER) { 1963 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname); 1964 err = -EINVAL; 1965 } else if (!netif_running(odev)) { 1966 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname); 1967 err = -ENETDOWN; 1968 } else { 1969 pkt_dev->odev = odev; 1970 return 0; 1971 } 1972 1973 dev_put(odev); 1974 return err; 1975 } 1976 1977 /* Read pkt_dev from the interface and set up internal pktgen_dev 1978 * structure to have the right information to create/send packets 1979 */ 1980 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 1981 { 1982 int ntxq; 1983 1984 if (!pkt_dev->odev) { 1985 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in " 1986 "setup_inject.\n"); 1987 sprintf(pkt_dev->result, 1988 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 1989 return; 1990 } 1991 1992 /* make sure that we don't pick a non-existing transmit queue */ 1993 ntxq = pkt_dev->odev->real_num_tx_queues; 1994 1995 if (ntxq <= pkt_dev->queue_map_min) { 1996 printk(KERN_WARNING "pktgen: WARNING: Requested " 1997 "queue_map_min (zero-based) (%d) exceeds valid range " 1998 "[0 - %d] for (%d) queues on %s, resetting\n", 1999 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, 2000 pkt_dev->odevname); 2001 pkt_dev->queue_map_min = ntxq - 1; 2002 } 2003 if (pkt_dev->queue_map_max >= ntxq) { 2004 printk(KERN_WARNING "pktgen: WARNING: Requested " 2005 "queue_map_max (zero-based) (%d) exceeds valid range " 2006 "[0 - %d] for (%d) queues on %s, resetting\n", 2007 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, 2008 pkt_dev->odevname); 2009 pkt_dev->queue_map_max = ntxq - 1; 2010 } 2011 2012 /* Default to the interface's mac if not explicitly set. */ 2013 2014 if (is_zero_ether_addr(pkt_dev->src_mac)) 2015 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN); 2016 2017 /* Set up Dest MAC */ 2018 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 2019 2020 /* Set up pkt size */ 2021 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2022 2023 if (pkt_dev->flags & F_IPV6) { 2024 /* 2025 * Skip this automatic address setting until locks or functions 2026 * gets exported 2027 */ 2028 2029 #ifdef NOTNOW 2030 int i, set = 0, err = 1; 2031 struct inet6_dev *idev; 2032 2033 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2034 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2035 set = 1; 2036 break; 2037 } 2038 2039 if (!set) { 2040 2041 /* 2042 * Use linklevel address if unconfigured. 2043 * 2044 * use ipv6_get_lladdr if/when it's get exported 2045 */ 2046 2047 rcu_read_lock(); 2048 idev = __in6_dev_get(pkt_dev->odev); 2049 if (idev) { 2050 struct inet6_ifaddr *ifp; 2051 2052 read_lock_bh(&idev->lock); 2053 for (ifp = idev->addr_list; ifp; 2054 ifp = ifp->if_next) { 2055 if (ifp->scope == IFA_LINK && 2056 !(ifp->flags & IFA_F_TENTATIVE)) { 2057 ipv6_addr_copy(&pkt_dev-> 2058 cur_in6_saddr, 2059 &ifp->addr); 2060 err = 0; 2061 break; 2062 } 2063 } 2064 read_unlock_bh(&idev->lock); 2065 } 2066 rcu_read_unlock(); 2067 if (err) 2068 printk(KERN_ERR "pktgen: ERROR: IPv6 link " 2069 "address not availble.\n"); 2070 } 2071 #endif 2072 } else { 2073 pkt_dev->saddr_min = 0; 2074 pkt_dev->saddr_max = 0; 2075 if (strlen(pkt_dev->src_min) == 0) { 2076 2077 struct in_device *in_dev; 2078 2079 rcu_read_lock(); 2080 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2081 if (in_dev) { 2082 if (in_dev->ifa_list) { 2083 pkt_dev->saddr_min = 2084 in_dev->ifa_list->ifa_address; 2085 pkt_dev->saddr_max = pkt_dev->saddr_min; 2086 } 2087 } 2088 rcu_read_unlock(); 2089 } else { 2090 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2091 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2092 } 2093 2094 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2095 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2096 } 2097 /* Initialize current values. */ 2098 pkt_dev->cur_dst_mac_offset = 0; 2099 pkt_dev->cur_src_mac_offset = 0; 2100 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2101 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2102 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2103 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2104 pkt_dev->nflows = 0; 2105 } 2106 2107 2108 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) 2109 { 2110 ktime_t start_time, end_time; 2111 s64 remaining; 2112 struct hrtimer_sleeper t; 2113 2114 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); 2115 hrtimer_set_expires(&t.timer, spin_until); 2116 2117 remaining = ktime_to_us(hrtimer_expires_remaining(&t.timer)); 2118 if (remaining <= 0) { 2119 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2120 return; 2121 } 2122 2123 start_time = ktime_now(); 2124 if (remaining < 100) 2125 udelay(remaining); /* really small just spin */ 2126 else { 2127 /* see do_nanosleep */ 2128 hrtimer_init_sleeper(&t, current); 2129 do { 2130 set_current_state(TASK_INTERRUPTIBLE); 2131 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS); 2132 if (!hrtimer_active(&t.timer)) 2133 t.task = NULL; 2134 2135 if (likely(t.task)) 2136 schedule(); 2137 2138 hrtimer_cancel(&t.timer); 2139 } while (t.task && pkt_dev->running && !signal_pending(current)); 2140 __set_current_state(TASK_RUNNING); 2141 } 2142 end_time = ktime_now(); 2143 2144 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); 2145 pkt_dev->next_tx = ktime_add_ns(end_time, pkt_dev->delay); 2146 } 2147 2148 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2149 { 2150 pkt_dev->pkt_overhead = 0; 2151 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2152 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2153 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2154 } 2155 2156 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) 2157 { 2158 return !!(pkt_dev->flows[flow].flags & F_INIT); 2159 } 2160 2161 static inline int f_pick(struct pktgen_dev *pkt_dev) 2162 { 2163 int flow = pkt_dev->curfl; 2164 2165 if (pkt_dev->flags & F_FLOW_SEQ) { 2166 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2167 /* reset time */ 2168 pkt_dev->flows[flow].count = 0; 2169 pkt_dev->flows[flow].flags = 0; 2170 pkt_dev->curfl += 1; 2171 if (pkt_dev->curfl >= pkt_dev->cflows) 2172 pkt_dev->curfl = 0; /*reset */ 2173 } 2174 } else { 2175 flow = random32() % pkt_dev->cflows; 2176 pkt_dev->curfl = flow; 2177 2178 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2179 pkt_dev->flows[flow].count = 0; 2180 pkt_dev->flows[flow].flags = 0; 2181 } 2182 } 2183 2184 return pkt_dev->curfl; 2185 } 2186 2187 2188 #ifdef CONFIG_XFRM 2189 /* If there was already an IPSEC SA, we keep it as is, else 2190 * we go look for it ... 2191 */ 2192 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2193 { 2194 struct xfrm_state *x = pkt_dev->flows[flow].x; 2195 if (!x) { 2196 /*slow path: we dont already have xfrm_state*/ 2197 x = xfrm_stateonly_find(&init_net, 2198 (xfrm_address_t *)&pkt_dev->cur_daddr, 2199 (xfrm_address_t *)&pkt_dev->cur_saddr, 2200 AF_INET, 2201 pkt_dev->ipsmode, 2202 pkt_dev->ipsproto, 0); 2203 if (x) { 2204 pkt_dev->flows[flow].x = x; 2205 set_pkt_overhead(pkt_dev); 2206 pkt_dev->pkt_overhead += x->props.header_len; 2207 } 2208 2209 } 2210 } 2211 #endif 2212 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2213 { 2214 2215 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2216 pkt_dev->cur_queue_map = smp_processor_id(); 2217 2218 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { 2219 __u16 t; 2220 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2221 t = random32() % 2222 (pkt_dev->queue_map_max - 2223 pkt_dev->queue_map_min + 1) 2224 + pkt_dev->queue_map_min; 2225 } else { 2226 t = pkt_dev->cur_queue_map + 1; 2227 if (t > pkt_dev->queue_map_max) 2228 t = pkt_dev->queue_map_min; 2229 } 2230 pkt_dev->cur_queue_map = t; 2231 } 2232 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2233 } 2234 2235 /* Increment/randomize headers according to flags and current values 2236 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2237 */ 2238 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2239 { 2240 __u32 imn; 2241 __u32 imx; 2242 int flow = 0; 2243 2244 if (pkt_dev->cflows) 2245 flow = f_pick(pkt_dev); 2246 2247 /* Deal with source MAC */ 2248 if (pkt_dev->src_mac_count > 1) { 2249 __u32 mc; 2250 __u32 tmp; 2251 2252 if (pkt_dev->flags & F_MACSRC_RND) 2253 mc = random32() % pkt_dev->src_mac_count; 2254 else { 2255 mc = pkt_dev->cur_src_mac_offset++; 2256 if (pkt_dev->cur_src_mac_offset >= 2257 pkt_dev->src_mac_count) 2258 pkt_dev->cur_src_mac_offset = 0; 2259 } 2260 2261 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2262 pkt_dev->hh[11] = tmp; 2263 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2264 pkt_dev->hh[10] = tmp; 2265 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2266 pkt_dev->hh[9] = tmp; 2267 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2268 pkt_dev->hh[8] = tmp; 2269 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2270 pkt_dev->hh[7] = tmp; 2271 } 2272 2273 /* Deal with Destination MAC */ 2274 if (pkt_dev->dst_mac_count > 1) { 2275 __u32 mc; 2276 __u32 tmp; 2277 2278 if (pkt_dev->flags & F_MACDST_RND) 2279 mc = random32() % pkt_dev->dst_mac_count; 2280 2281 else { 2282 mc = pkt_dev->cur_dst_mac_offset++; 2283 if (pkt_dev->cur_dst_mac_offset >= 2284 pkt_dev->dst_mac_count) { 2285 pkt_dev->cur_dst_mac_offset = 0; 2286 } 2287 } 2288 2289 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2290 pkt_dev->hh[5] = tmp; 2291 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2292 pkt_dev->hh[4] = tmp; 2293 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2294 pkt_dev->hh[3] = tmp; 2295 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2296 pkt_dev->hh[2] = tmp; 2297 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2298 pkt_dev->hh[1] = tmp; 2299 } 2300 2301 if (pkt_dev->flags & F_MPLS_RND) { 2302 unsigned i; 2303 for (i = 0; i < pkt_dev->nr_labels; i++) 2304 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2305 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2306 ((__force __be32)random32() & 2307 htonl(0x000fffff)); 2308 } 2309 2310 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2311 pkt_dev->vlan_id = random32() & (4096-1); 2312 } 2313 2314 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2315 pkt_dev->svlan_id = random32() & (4096 - 1); 2316 } 2317 2318 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2319 if (pkt_dev->flags & F_UDPSRC_RND) 2320 pkt_dev->cur_udp_src = random32() % 2321 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2322 + pkt_dev->udp_src_min; 2323 2324 else { 2325 pkt_dev->cur_udp_src++; 2326 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2327 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2328 } 2329 } 2330 2331 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2332 if (pkt_dev->flags & F_UDPDST_RND) { 2333 pkt_dev->cur_udp_dst = random32() % 2334 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2335 + pkt_dev->udp_dst_min; 2336 } else { 2337 pkt_dev->cur_udp_dst++; 2338 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2339 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2340 } 2341 } 2342 2343 if (!(pkt_dev->flags & F_IPV6)) { 2344 2345 imn = ntohl(pkt_dev->saddr_min); 2346 imx = ntohl(pkt_dev->saddr_max); 2347 if (imn < imx) { 2348 __u32 t; 2349 if (pkt_dev->flags & F_IPSRC_RND) 2350 t = random32() % (imx - imn) + imn; 2351 else { 2352 t = ntohl(pkt_dev->cur_saddr); 2353 t++; 2354 if (t > imx) 2355 t = imn; 2356 2357 } 2358 pkt_dev->cur_saddr = htonl(t); 2359 } 2360 2361 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2362 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2363 } else { 2364 imn = ntohl(pkt_dev->daddr_min); 2365 imx = ntohl(pkt_dev->daddr_max); 2366 if (imn < imx) { 2367 __u32 t; 2368 __be32 s; 2369 if (pkt_dev->flags & F_IPDST_RND) { 2370 2371 t = random32() % (imx - imn) + imn; 2372 s = htonl(t); 2373 2374 while (ipv4_is_loopback(s) || 2375 ipv4_is_multicast(s) || 2376 ipv4_is_lbcast(s) || 2377 ipv4_is_zeronet(s) || 2378 ipv4_is_local_multicast(s)) { 2379 t = random32() % (imx - imn) + imn; 2380 s = htonl(t); 2381 } 2382 pkt_dev->cur_daddr = s; 2383 } else { 2384 t = ntohl(pkt_dev->cur_daddr); 2385 t++; 2386 if (t > imx) { 2387 t = imn; 2388 } 2389 pkt_dev->cur_daddr = htonl(t); 2390 } 2391 } 2392 if (pkt_dev->cflows) { 2393 pkt_dev->flows[flow].flags |= F_INIT; 2394 pkt_dev->flows[flow].cur_daddr = 2395 pkt_dev->cur_daddr; 2396 #ifdef CONFIG_XFRM 2397 if (pkt_dev->flags & F_IPSEC_ON) 2398 get_ipsec_sa(pkt_dev, flow); 2399 #endif 2400 pkt_dev->nflows++; 2401 } 2402 } 2403 } else { /* IPV6 * */ 2404 2405 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 && 2406 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 && 2407 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 && 2408 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ; 2409 else { 2410 int i; 2411 2412 /* Only random destinations yet */ 2413 2414 for (i = 0; i < 4; i++) { 2415 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2416 (((__force __be32)random32() | 2417 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2418 pkt_dev->max_in6_daddr.s6_addr32[i]); 2419 } 2420 } 2421 } 2422 2423 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2424 __u32 t; 2425 if (pkt_dev->flags & F_TXSIZE_RND) { 2426 t = random32() % 2427 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2428 + pkt_dev->min_pkt_size; 2429 } else { 2430 t = pkt_dev->cur_pkt_size + 1; 2431 if (t > pkt_dev->max_pkt_size) 2432 t = pkt_dev->min_pkt_size; 2433 } 2434 pkt_dev->cur_pkt_size = t; 2435 } 2436 2437 set_cur_queue_map(pkt_dev); 2438 2439 pkt_dev->flows[flow].count++; 2440 } 2441 2442 2443 #ifdef CONFIG_XFRM 2444 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2445 { 2446 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2447 int err = 0; 2448 struct iphdr *iph; 2449 2450 if (!x) 2451 return 0; 2452 /* XXX: we dont support tunnel mode for now until 2453 * we resolve the dst issue */ 2454 if (x->props.mode != XFRM_MODE_TRANSPORT) 2455 return 0; 2456 2457 spin_lock(&x->lock); 2458 iph = ip_hdr(skb); 2459 2460 err = x->outer_mode->output(x, skb); 2461 if (err) 2462 goto error; 2463 err = x->type->output(x, skb); 2464 if (err) 2465 goto error; 2466 2467 x->curlft.bytes += skb->len; 2468 x->curlft.packets++; 2469 error: 2470 spin_unlock(&x->lock); 2471 return err; 2472 } 2473 2474 static void free_SAs(struct pktgen_dev *pkt_dev) 2475 { 2476 if (pkt_dev->cflows) { 2477 /* let go of the SAs if we have them */ 2478 int i = 0; 2479 for (; i < pkt_dev->cflows; i++) { 2480 struct xfrm_state *x = pkt_dev->flows[i].x; 2481 if (x) { 2482 xfrm_state_put(x); 2483 pkt_dev->flows[i].x = NULL; 2484 } 2485 } 2486 } 2487 } 2488 2489 static int process_ipsec(struct pktgen_dev *pkt_dev, 2490 struct sk_buff *skb, __be16 protocol) 2491 { 2492 if (pkt_dev->flags & F_IPSEC_ON) { 2493 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2494 int nhead = 0; 2495 if (x) { 2496 int ret; 2497 __u8 *eth; 2498 nhead = x->props.header_len - skb_headroom(skb); 2499 if (nhead > 0) { 2500 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2501 if (ret < 0) { 2502 printk(KERN_ERR "Error expanding " 2503 "ipsec packet %d\n", ret); 2504 goto err; 2505 } 2506 } 2507 2508 /* ipsec is not expecting ll header */ 2509 skb_pull(skb, ETH_HLEN); 2510 ret = pktgen_output_ipsec(skb, pkt_dev); 2511 if (ret) { 2512 printk(KERN_ERR "Error creating ipsec " 2513 "packet %d\n", ret); 2514 goto err; 2515 } 2516 /* restore ll */ 2517 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2518 memcpy(eth, pkt_dev->hh, 12); 2519 *(u16 *) ð[12] = protocol; 2520 } 2521 } 2522 return 1; 2523 err: 2524 kfree_skb(skb); 2525 return 0; 2526 } 2527 #endif 2528 2529 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2530 { 2531 unsigned i; 2532 for (i = 0; i < pkt_dev->nr_labels; i++) 2533 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2534 2535 mpls--; 2536 *mpls |= MPLS_STACK_BOTTOM; 2537 } 2538 2539 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2540 unsigned int prio) 2541 { 2542 return htons(id | (cfi << 12) | (prio << 13)); 2543 } 2544 2545 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2546 struct pktgen_dev *pkt_dev) 2547 { 2548 struct sk_buff *skb = NULL; 2549 __u8 *eth; 2550 struct udphdr *udph; 2551 int datalen, iplen; 2552 struct iphdr *iph; 2553 struct pktgen_hdr *pgh = NULL; 2554 __be16 protocol = htons(ETH_P_IP); 2555 __be32 *mpls; 2556 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2557 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2558 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2559 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2560 u16 queue_map; 2561 2562 if (pkt_dev->nr_labels) 2563 protocol = htons(ETH_P_MPLS_UC); 2564 2565 if (pkt_dev->vlan_id != 0xffff) 2566 protocol = htons(ETH_P_8021Q); 2567 2568 /* Update any of the values, used when we're incrementing various 2569 * fields. 2570 */ 2571 queue_map = pkt_dev->cur_queue_map; 2572 mod_cur_headers(pkt_dev); 2573 2574 datalen = (odev->hard_header_len + 16) & ~0xf; 2575 skb = __netdev_alloc_skb(odev, 2576 pkt_dev->cur_pkt_size + 64 2577 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT); 2578 if (!skb) { 2579 sprintf(pkt_dev->result, "No memory"); 2580 return NULL; 2581 } 2582 2583 skb_reserve(skb, datalen); 2584 2585 /* Reserve for ethernet and IP header */ 2586 eth = (__u8 *) skb_push(skb, 14); 2587 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2588 if (pkt_dev->nr_labels) 2589 mpls_push(mpls, pkt_dev); 2590 2591 if (pkt_dev->vlan_id != 0xffff) { 2592 if (pkt_dev->svlan_id != 0xffff) { 2593 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2594 *svlan_tci = build_tci(pkt_dev->svlan_id, 2595 pkt_dev->svlan_cfi, 2596 pkt_dev->svlan_p); 2597 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2598 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2599 } 2600 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2601 *vlan_tci = build_tci(pkt_dev->vlan_id, 2602 pkt_dev->vlan_cfi, 2603 pkt_dev->vlan_p); 2604 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2605 *vlan_encapsulated_proto = htons(ETH_P_IP); 2606 } 2607 2608 skb->network_header = skb->tail; 2609 skb->transport_header = skb->network_header + sizeof(struct iphdr); 2610 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr)); 2611 skb_set_queue_mapping(skb, queue_map); 2612 iph = ip_hdr(skb); 2613 udph = udp_hdr(skb); 2614 2615 memcpy(eth, pkt_dev->hh, 12); 2616 *(__be16 *) & eth[12] = protocol; 2617 2618 /* Eth + IPh + UDPh + mpls */ 2619 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2620 pkt_dev->pkt_overhead; 2621 if (datalen < sizeof(struct pktgen_hdr)) 2622 datalen = sizeof(struct pktgen_hdr); 2623 2624 udph->source = htons(pkt_dev->cur_udp_src); 2625 udph->dest = htons(pkt_dev->cur_udp_dst); 2626 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2627 udph->check = 0; /* No checksum */ 2628 2629 iph->ihl = 5; 2630 iph->version = 4; 2631 iph->ttl = 32; 2632 iph->tos = pkt_dev->tos; 2633 iph->protocol = IPPROTO_UDP; /* UDP */ 2634 iph->saddr = pkt_dev->cur_saddr; 2635 iph->daddr = pkt_dev->cur_daddr; 2636 iph->id = htons(pkt_dev->ip_id); 2637 pkt_dev->ip_id++; 2638 iph->frag_off = 0; 2639 iplen = 20 + 8 + datalen; 2640 iph->tot_len = htons(iplen); 2641 iph->check = 0; 2642 iph->check = ip_fast_csum((void *)iph, iph->ihl); 2643 skb->protocol = protocol; 2644 skb->mac_header = (skb->network_header - ETH_HLEN - 2645 pkt_dev->pkt_overhead); 2646 skb->dev = odev; 2647 skb->pkt_type = PACKET_HOST; 2648 2649 if (pkt_dev->nfrags <= 0) { 2650 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 2651 memset(pgh + 1, 0, datalen - sizeof(struct pktgen_hdr)); 2652 } else { 2653 int frags = pkt_dev->nfrags; 2654 int i, len; 2655 2656 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 2657 2658 if (frags > MAX_SKB_FRAGS) 2659 frags = MAX_SKB_FRAGS; 2660 if (datalen > frags * PAGE_SIZE) { 2661 len = datalen - frags * PAGE_SIZE; 2662 memset(skb_put(skb, len), 0, len); 2663 datalen = frags * PAGE_SIZE; 2664 } 2665 2666 i = 0; 2667 while (datalen > 0) { 2668 struct page *page = alloc_pages(GFP_KERNEL | __GFP_ZERO, 0); 2669 skb_shinfo(skb)->frags[i].page = page; 2670 skb_shinfo(skb)->frags[i].page_offset = 0; 2671 skb_shinfo(skb)->frags[i].size = 2672 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 2673 datalen -= skb_shinfo(skb)->frags[i].size; 2674 skb->len += skb_shinfo(skb)->frags[i].size; 2675 skb->data_len += skb_shinfo(skb)->frags[i].size; 2676 i++; 2677 skb_shinfo(skb)->nr_frags = i; 2678 } 2679 2680 while (i < frags) { 2681 int rem; 2682 2683 if (i == 0) 2684 break; 2685 2686 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 2687 if (rem == 0) 2688 break; 2689 2690 skb_shinfo(skb)->frags[i - 1].size -= rem; 2691 2692 skb_shinfo(skb)->frags[i] = 2693 skb_shinfo(skb)->frags[i - 1]; 2694 get_page(skb_shinfo(skb)->frags[i].page); 2695 skb_shinfo(skb)->frags[i].page = 2696 skb_shinfo(skb)->frags[i - 1].page; 2697 skb_shinfo(skb)->frags[i].page_offset += 2698 skb_shinfo(skb)->frags[i - 1].size; 2699 skb_shinfo(skb)->frags[i].size = rem; 2700 i++; 2701 skb_shinfo(skb)->nr_frags = i; 2702 } 2703 } 2704 2705 /* Stamp the time, and sequence number, 2706 * convert them to network byte order 2707 */ 2708 if (pgh) { 2709 struct timeval timestamp; 2710 2711 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2712 pgh->seq_num = htonl(pkt_dev->seq_num); 2713 2714 do_gettimeofday(×tamp); 2715 pgh->tv_sec = htonl(timestamp.tv_sec); 2716 pgh->tv_usec = htonl(timestamp.tv_usec); 2717 } 2718 2719 #ifdef CONFIG_XFRM 2720 if (!process_ipsec(pkt_dev, skb, protocol)) 2721 return NULL; 2722 #endif 2723 2724 return skb; 2725 } 2726 2727 /* 2728 * scan_ip6, fmt_ip taken from dietlibc-0.21 2729 * Author Felix von Leitner <felix-dietlibc@fefe.de> 2730 * 2731 * Slightly modified for kernel. 2732 * Should be candidate for net/ipv4/utils.c 2733 * --ro 2734 */ 2735 2736 static unsigned int scan_ip6(const char *s, char ip[16]) 2737 { 2738 unsigned int i; 2739 unsigned int len = 0; 2740 unsigned long u; 2741 char suffix[16]; 2742 unsigned int prefixlen = 0; 2743 unsigned int suffixlen = 0; 2744 __be32 tmp; 2745 char *pos; 2746 2747 for (i = 0; i < 16; i++) 2748 ip[i] = 0; 2749 2750 for (;;) { 2751 if (*s == ':') { 2752 len++; 2753 if (s[1] == ':') { /* Found "::", skip to part 2 */ 2754 s += 2; 2755 len++; 2756 break; 2757 } 2758 s++; 2759 } 2760 2761 u = simple_strtoul(s, &pos, 16); 2762 i = pos - s; 2763 if (!i) 2764 return 0; 2765 if (prefixlen == 12 && s[i] == '.') { 2766 2767 /* the last 4 bytes may be written as IPv4 address */ 2768 2769 tmp = in_aton(s); 2770 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp)); 2771 return i + len; 2772 } 2773 ip[prefixlen++] = (u >> 8); 2774 ip[prefixlen++] = (u & 255); 2775 s += i; 2776 len += i; 2777 if (prefixlen == 16) 2778 return len; 2779 } 2780 2781 /* part 2, after "::" */ 2782 for (;;) { 2783 if (*s == ':') { 2784 if (suffixlen == 0) 2785 break; 2786 s++; 2787 len++; 2788 } else if (suffixlen != 0) 2789 break; 2790 2791 u = simple_strtol(s, &pos, 16); 2792 i = pos - s; 2793 if (!i) { 2794 if (*s) 2795 len--; 2796 break; 2797 } 2798 if (suffixlen + prefixlen <= 12 && s[i] == '.') { 2799 tmp = in_aton(s); 2800 memcpy((struct in_addr *)(suffix + suffixlen), &tmp, 2801 sizeof(tmp)); 2802 suffixlen += 4; 2803 len += strlen(s); 2804 break; 2805 } 2806 suffix[suffixlen++] = (u >> 8); 2807 suffix[suffixlen++] = (u & 255); 2808 s += i; 2809 len += i; 2810 if (prefixlen + suffixlen == 16) 2811 break; 2812 } 2813 for (i = 0; i < suffixlen; i++) 2814 ip[16 - suffixlen + i] = suffix[i]; 2815 return len; 2816 } 2817 2818 static char tohex(char hexdigit) 2819 { 2820 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0'; 2821 } 2822 2823 static int fmt_xlong(char *s, unsigned int i) 2824 { 2825 char *bak = s; 2826 *s = tohex((i >> 12) & 0xf); 2827 if (s != bak || *s != '0') 2828 ++s; 2829 *s = tohex((i >> 8) & 0xf); 2830 if (s != bak || *s != '0') 2831 ++s; 2832 *s = tohex((i >> 4) & 0xf); 2833 if (s != bak || *s != '0') 2834 ++s; 2835 *s = tohex(i & 0xf); 2836 return s - bak + 1; 2837 } 2838 2839 static unsigned int fmt_ip6(char *s, const char ip[16]) 2840 { 2841 unsigned int len; 2842 unsigned int i; 2843 unsigned int temp; 2844 unsigned int compressing; 2845 int j; 2846 2847 len = 0; 2848 compressing = 0; 2849 for (j = 0; j < 16; j += 2) { 2850 2851 #ifdef V4MAPPEDPREFIX 2852 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) { 2853 inet_ntoa_r(*(struct in_addr *)(ip + 12), s); 2854 temp = strlen(s); 2855 return len + temp; 2856 } 2857 #endif 2858 temp = ((unsigned long)(unsigned char)ip[j] << 8) + 2859 (unsigned long)(unsigned char)ip[j + 1]; 2860 if (temp == 0) { 2861 if (!compressing) { 2862 compressing = 1; 2863 if (j == 0) { 2864 *s++ = ':'; 2865 ++len; 2866 } 2867 } 2868 } else { 2869 if (compressing) { 2870 compressing = 0; 2871 *s++ = ':'; 2872 ++len; 2873 } 2874 i = fmt_xlong(s, temp); 2875 len += i; 2876 s += i; 2877 if (j < 14) { 2878 *s++ = ':'; 2879 ++len; 2880 } 2881 } 2882 } 2883 if (compressing) { 2884 *s++ = ':'; 2885 ++len; 2886 } 2887 *s = 0; 2888 return len; 2889 } 2890 2891 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2892 struct pktgen_dev *pkt_dev) 2893 { 2894 struct sk_buff *skb = NULL; 2895 __u8 *eth; 2896 struct udphdr *udph; 2897 int datalen; 2898 struct ipv6hdr *iph; 2899 struct pktgen_hdr *pgh = NULL; 2900 __be16 protocol = htons(ETH_P_IPV6); 2901 __be32 *mpls; 2902 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2903 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2904 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2905 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2906 u16 queue_map; 2907 2908 if (pkt_dev->nr_labels) 2909 protocol = htons(ETH_P_MPLS_UC); 2910 2911 if (pkt_dev->vlan_id != 0xffff) 2912 protocol = htons(ETH_P_8021Q); 2913 2914 /* Update any of the values, used when we're incrementing various 2915 * fields. 2916 */ 2917 queue_map = pkt_dev->cur_queue_map; 2918 mod_cur_headers(pkt_dev); 2919 2920 skb = __netdev_alloc_skb(odev, 2921 pkt_dev->cur_pkt_size + 64 2922 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT); 2923 if (!skb) { 2924 sprintf(pkt_dev->result, "No memory"); 2925 return NULL; 2926 } 2927 2928 skb_reserve(skb, 16); 2929 2930 /* Reserve for ethernet and IP header */ 2931 eth = (__u8 *) skb_push(skb, 14); 2932 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2933 if (pkt_dev->nr_labels) 2934 mpls_push(mpls, pkt_dev); 2935 2936 if (pkt_dev->vlan_id != 0xffff) { 2937 if (pkt_dev->svlan_id != 0xffff) { 2938 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2939 *svlan_tci = build_tci(pkt_dev->svlan_id, 2940 pkt_dev->svlan_cfi, 2941 pkt_dev->svlan_p); 2942 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2943 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2944 } 2945 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2946 *vlan_tci = build_tci(pkt_dev->vlan_id, 2947 pkt_dev->vlan_cfi, 2948 pkt_dev->vlan_p); 2949 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2950 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 2951 } 2952 2953 skb->network_header = skb->tail; 2954 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr); 2955 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr)); 2956 skb_set_queue_mapping(skb, queue_map); 2957 iph = ipv6_hdr(skb); 2958 udph = udp_hdr(skb); 2959 2960 memcpy(eth, pkt_dev->hh, 12); 2961 *(__be16 *) ð[12] = protocol; 2962 2963 /* Eth + IPh + UDPh + mpls */ 2964 datalen = pkt_dev->cur_pkt_size - 14 - 2965 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 2966 pkt_dev->pkt_overhead; 2967 2968 if (datalen < sizeof(struct pktgen_hdr)) { 2969 datalen = sizeof(struct pktgen_hdr); 2970 if (net_ratelimit()) 2971 printk(KERN_INFO "pktgen: increased datalen to %d\n", 2972 datalen); 2973 } 2974 2975 udph->source = htons(pkt_dev->cur_udp_src); 2976 udph->dest = htons(pkt_dev->cur_udp_dst); 2977 udph->len = htons(datalen + sizeof(struct udphdr)); 2978 udph->check = 0; /* No checksum */ 2979 2980 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 2981 2982 if (pkt_dev->traffic_class) { 2983 /* Version + traffic class + flow (0) */ 2984 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 2985 } 2986 2987 iph->hop_limit = 32; 2988 2989 iph->payload_len = htons(sizeof(struct udphdr) + datalen); 2990 iph->nexthdr = IPPROTO_UDP; 2991 2992 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr); 2993 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr); 2994 2995 skb->mac_header = (skb->network_header - ETH_HLEN - 2996 pkt_dev->pkt_overhead); 2997 skb->protocol = protocol; 2998 skb->dev = odev; 2999 skb->pkt_type = PACKET_HOST; 3000 3001 if (pkt_dev->nfrags <= 0) 3002 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 3003 else { 3004 int frags = pkt_dev->nfrags; 3005 int i; 3006 3007 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 3008 3009 if (frags > MAX_SKB_FRAGS) 3010 frags = MAX_SKB_FRAGS; 3011 if (datalen > frags * PAGE_SIZE) { 3012 skb_put(skb, datalen - frags * PAGE_SIZE); 3013 datalen = frags * PAGE_SIZE; 3014 } 3015 3016 i = 0; 3017 while (datalen > 0) { 3018 struct page *page = alloc_pages(GFP_KERNEL, 0); 3019 skb_shinfo(skb)->frags[i].page = page; 3020 skb_shinfo(skb)->frags[i].page_offset = 0; 3021 skb_shinfo(skb)->frags[i].size = 3022 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 3023 datalen -= skb_shinfo(skb)->frags[i].size; 3024 skb->len += skb_shinfo(skb)->frags[i].size; 3025 skb->data_len += skb_shinfo(skb)->frags[i].size; 3026 i++; 3027 skb_shinfo(skb)->nr_frags = i; 3028 } 3029 3030 while (i < frags) { 3031 int rem; 3032 3033 if (i == 0) 3034 break; 3035 3036 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 3037 if (rem == 0) 3038 break; 3039 3040 skb_shinfo(skb)->frags[i - 1].size -= rem; 3041 3042 skb_shinfo(skb)->frags[i] = 3043 skb_shinfo(skb)->frags[i - 1]; 3044 get_page(skb_shinfo(skb)->frags[i].page); 3045 skb_shinfo(skb)->frags[i].page = 3046 skb_shinfo(skb)->frags[i - 1].page; 3047 skb_shinfo(skb)->frags[i].page_offset += 3048 skb_shinfo(skb)->frags[i - 1].size; 3049 skb_shinfo(skb)->frags[i].size = rem; 3050 i++; 3051 skb_shinfo(skb)->nr_frags = i; 3052 } 3053 } 3054 3055 /* Stamp the time, and sequence number, 3056 * convert them to network byte order 3057 * should we update cloned packets too ? 3058 */ 3059 if (pgh) { 3060 struct timeval timestamp; 3061 3062 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 3063 pgh->seq_num = htonl(pkt_dev->seq_num); 3064 3065 do_gettimeofday(×tamp); 3066 pgh->tv_sec = htonl(timestamp.tv_sec); 3067 pgh->tv_usec = htonl(timestamp.tv_usec); 3068 } 3069 /* pkt_dev->seq_num++; FF: you really mean this? */ 3070 3071 return skb; 3072 } 3073 3074 static struct sk_buff *fill_packet(struct net_device *odev, 3075 struct pktgen_dev *pkt_dev) 3076 { 3077 if (pkt_dev->flags & F_IPV6) 3078 return fill_packet_ipv6(odev, pkt_dev); 3079 else 3080 return fill_packet_ipv4(odev, pkt_dev); 3081 } 3082 3083 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 3084 { 3085 pkt_dev->seq_num = 1; 3086 pkt_dev->idle_acc = 0; 3087 pkt_dev->sofar = 0; 3088 pkt_dev->tx_bytes = 0; 3089 pkt_dev->errors = 0; 3090 } 3091 3092 /* Set up structure for sending pkts, clear counters */ 3093 3094 static void pktgen_run(struct pktgen_thread *t) 3095 { 3096 struct pktgen_dev *pkt_dev; 3097 int started = 0; 3098 3099 pr_debug("pktgen: entering pktgen_run. %p\n", t); 3100 3101 if_lock(t); 3102 list_for_each_entry(pkt_dev, &t->if_list, list) { 3103 3104 /* 3105 * setup odev and create initial packet. 3106 */ 3107 pktgen_setup_inject(pkt_dev); 3108 3109 if (pkt_dev->odev) { 3110 pktgen_clear_counters(pkt_dev); 3111 pkt_dev->running = 1; /* Cranke yeself! */ 3112 pkt_dev->skb = NULL; 3113 pkt_dev->started_at = 3114 pkt_dev->next_tx = ktime_now(); 3115 3116 set_pkt_overhead(pkt_dev); 3117 3118 strcpy(pkt_dev->result, "Starting"); 3119 started++; 3120 } else 3121 strcpy(pkt_dev->result, "Error starting"); 3122 } 3123 if_unlock(t); 3124 if (started) 3125 t->control &= ~(T_STOP); 3126 } 3127 3128 static void pktgen_stop_all_threads_ifs(void) 3129 { 3130 struct pktgen_thread *t; 3131 3132 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n"); 3133 3134 mutex_lock(&pktgen_thread_lock); 3135 3136 list_for_each_entry(t, &pktgen_threads, th_list) 3137 t->control |= T_STOP; 3138 3139 mutex_unlock(&pktgen_thread_lock); 3140 } 3141 3142 static int thread_is_running(const struct pktgen_thread *t) 3143 { 3144 const struct pktgen_dev *pkt_dev; 3145 3146 list_for_each_entry(pkt_dev, &t->if_list, list) 3147 if (pkt_dev->running) 3148 return 1; 3149 return 0; 3150 } 3151 3152 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3153 { 3154 if_lock(t); 3155 3156 while (thread_is_running(t)) { 3157 3158 if_unlock(t); 3159 3160 msleep_interruptible(100); 3161 3162 if (signal_pending(current)) 3163 goto signal; 3164 if_lock(t); 3165 } 3166 if_unlock(t); 3167 return 1; 3168 signal: 3169 return 0; 3170 } 3171 3172 static int pktgen_wait_all_threads_run(void) 3173 { 3174 struct pktgen_thread *t; 3175 int sig = 1; 3176 3177 mutex_lock(&pktgen_thread_lock); 3178 3179 list_for_each_entry(t, &pktgen_threads, th_list) { 3180 sig = pktgen_wait_thread_run(t); 3181 if (sig == 0) 3182 break; 3183 } 3184 3185 if (sig == 0) 3186 list_for_each_entry(t, &pktgen_threads, th_list) 3187 t->control |= (T_STOP); 3188 3189 mutex_unlock(&pktgen_thread_lock); 3190 return sig; 3191 } 3192 3193 static void pktgen_run_all_threads(void) 3194 { 3195 struct pktgen_thread *t; 3196 3197 pr_debug("pktgen: entering pktgen_run_all_threads.\n"); 3198 3199 mutex_lock(&pktgen_thread_lock); 3200 3201 list_for_each_entry(t, &pktgen_threads, th_list) 3202 t->control |= (T_RUN); 3203 3204 mutex_unlock(&pktgen_thread_lock); 3205 3206 /* Propagate thread->control */ 3207 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3208 3209 pktgen_wait_all_threads_run(); 3210 } 3211 3212 static void pktgen_reset_all_threads(void) 3213 { 3214 struct pktgen_thread *t; 3215 3216 pr_debug("pktgen: entering pktgen_reset_all_threads.\n"); 3217 3218 mutex_lock(&pktgen_thread_lock); 3219 3220 list_for_each_entry(t, &pktgen_threads, th_list) 3221 t->control |= (T_REMDEVALL); 3222 3223 mutex_unlock(&pktgen_thread_lock); 3224 3225 /* Propagate thread->control */ 3226 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3227 3228 pktgen_wait_all_threads_run(); 3229 } 3230 3231 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3232 { 3233 __u64 bps, mbps, pps; 3234 char *p = pkt_dev->result; 3235 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3236 pkt_dev->started_at); 3237 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3238 3239 p += sprintf(p, "OK: %llu(c%llu+d%llu) nsec, %llu (%dbyte,%dfrags)\n", 3240 (unsigned long long)ktime_to_us(elapsed), 3241 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3242 (unsigned long long)ktime_to_us(idle), 3243 (unsigned long long)pkt_dev->sofar, 3244 pkt_dev->cur_pkt_size, nr_frags); 3245 3246 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3247 ktime_to_ns(elapsed)); 3248 3249 bps = pps * 8 * pkt_dev->cur_pkt_size; 3250 3251 mbps = bps; 3252 do_div(mbps, 1000000); 3253 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3254 (unsigned long long)pps, 3255 (unsigned long long)mbps, 3256 (unsigned long long)bps, 3257 (unsigned long long)pkt_dev->errors); 3258 } 3259 3260 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3261 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3262 { 3263 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3264 3265 if (!pkt_dev->running) { 3266 printk(KERN_WARNING "pktgen: interface: %s is already " 3267 "stopped\n", pkt_dev->odevname); 3268 return -EINVAL; 3269 } 3270 3271 kfree_skb(pkt_dev->skb); 3272 pkt_dev->skb = NULL; 3273 pkt_dev->stopped_at = ktime_now(); 3274 pkt_dev->running = 0; 3275 3276 show_results(pkt_dev, nr_frags); 3277 3278 return 0; 3279 } 3280 3281 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3282 { 3283 struct pktgen_dev *pkt_dev, *best = NULL; 3284 3285 if_lock(t); 3286 3287 list_for_each_entry(pkt_dev, &t->if_list, list) { 3288 if (!pkt_dev->running) 3289 continue; 3290 if (best == NULL) 3291 best = pkt_dev; 3292 else if (ktime_lt(pkt_dev->next_tx, best->next_tx)) 3293 best = pkt_dev; 3294 } 3295 if_unlock(t); 3296 return best; 3297 } 3298 3299 static void pktgen_stop(struct pktgen_thread *t) 3300 { 3301 struct pktgen_dev *pkt_dev; 3302 3303 pr_debug("pktgen: entering pktgen_stop\n"); 3304 3305 if_lock(t); 3306 3307 list_for_each_entry(pkt_dev, &t->if_list, list) { 3308 pktgen_stop_device(pkt_dev); 3309 } 3310 3311 if_unlock(t); 3312 } 3313 3314 /* 3315 * one of our devices needs to be removed - find it 3316 * and remove it 3317 */ 3318 static void pktgen_rem_one_if(struct pktgen_thread *t) 3319 { 3320 struct list_head *q, *n; 3321 struct pktgen_dev *cur; 3322 3323 pr_debug("pktgen: entering pktgen_rem_one_if\n"); 3324 3325 if_lock(t); 3326 3327 list_for_each_safe(q, n, &t->if_list) { 3328 cur = list_entry(q, struct pktgen_dev, list); 3329 3330 if (!cur->removal_mark) 3331 continue; 3332 3333 kfree_skb(cur->skb); 3334 cur->skb = NULL; 3335 3336 pktgen_remove_device(t, cur); 3337 3338 break; 3339 } 3340 3341 if_unlock(t); 3342 } 3343 3344 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3345 { 3346 struct list_head *q, *n; 3347 struct pktgen_dev *cur; 3348 3349 /* Remove all devices, free mem */ 3350 3351 pr_debug("pktgen: entering pktgen_rem_all_ifs\n"); 3352 if_lock(t); 3353 3354 list_for_each_safe(q, n, &t->if_list) { 3355 cur = list_entry(q, struct pktgen_dev, list); 3356 3357 kfree_skb(cur->skb); 3358 cur->skb = NULL; 3359 3360 pktgen_remove_device(t, cur); 3361 } 3362 3363 if_unlock(t); 3364 } 3365 3366 static void pktgen_rem_thread(struct pktgen_thread *t) 3367 { 3368 /* Remove from the thread list */ 3369 3370 remove_proc_entry(t->tsk->comm, pg_proc_dir); 3371 3372 mutex_lock(&pktgen_thread_lock); 3373 3374 list_del(&t->th_list); 3375 3376 mutex_unlock(&pktgen_thread_lock); 3377 } 3378 3379 static void pktgen_resched(struct pktgen_dev *pkt_dev) 3380 { 3381 ktime_t idle_start = ktime_now(); 3382 schedule(); 3383 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3384 } 3385 3386 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) 3387 { 3388 ktime_t idle_start = ktime_now(); 3389 3390 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3391 if (signal_pending(current)) 3392 break; 3393 3394 if (need_resched()) 3395 pktgen_resched(pkt_dev); 3396 else 3397 cpu_relax(); 3398 } 3399 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3400 } 3401 3402 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3403 { 3404 struct net_device *odev = pkt_dev->odev; 3405 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *) 3406 = odev->netdev_ops->ndo_start_xmit; 3407 struct netdev_queue *txq; 3408 u16 queue_map; 3409 int ret; 3410 3411 /* If device is offline, then don't send */ 3412 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { 3413 pktgen_stop_device(pkt_dev); 3414 return; 3415 } 3416 3417 /* This is max DELAY, this has special meaning of 3418 * "never transmit" 3419 */ 3420 if (unlikely(pkt_dev->delay == ULLONG_MAX)) { 3421 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX); 3422 return; 3423 } 3424 3425 /* If no skb or clone count exhausted then get new one */ 3426 if (!pkt_dev->skb || (pkt_dev->last_ok && 3427 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { 3428 /* build a new pkt */ 3429 kfree_skb(pkt_dev->skb); 3430 3431 pkt_dev->skb = fill_packet(odev, pkt_dev); 3432 if (pkt_dev->skb == NULL) { 3433 printk(KERN_ERR "pktgen: ERROR: couldn't " 3434 "allocate skb in fill_packet.\n"); 3435 schedule(); 3436 pkt_dev->clone_count--; /* back out increment, OOM */ 3437 return; 3438 } 3439 pkt_dev->last_pkt_size = pkt_dev->skb->len; 3440 pkt_dev->allocated_skbs++; 3441 pkt_dev->clone_count = 0; /* reset counter */ 3442 } 3443 3444 if (pkt_dev->delay && pkt_dev->last_ok) 3445 spin(pkt_dev, pkt_dev->next_tx); 3446 3447 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3448 txq = netdev_get_tx_queue(odev, queue_map); 3449 3450 __netif_tx_lock_bh(txq); 3451 3452 if (unlikely(netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq))) { 3453 ret = NETDEV_TX_BUSY; 3454 pkt_dev->last_ok = 0; 3455 goto unlock; 3456 } 3457 atomic_inc(&(pkt_dev->skb->users)); 3458 ret = (*xmit)(pkt_dev->skb, odev); 3459 3460 switch (ret) { 3461 case NETDEV_TX_OK: 3462 txq_trans_update(txq); 3463 pkt_dev->last_ok = 1; 3464 pkt_dev->sofar++; 3465 pkt_dev->seq_num++; 3466 pkt_dev->tx_bytes += pkt_dev->last_pkt_size; 3467 break; 3468 default: /* Drivers are not supposed to return other values! */ 3469 if (net_ratelimit()) 3470 pr_info("pktgen: %s xmit error: %d\n", 3471 pkt_dev->odevname, ret); 3472 pkt_dev->errors++; 3473 /* fallthru */ 3474 case NETDEV_TX_LOCKED: 3475 case NETDEV_TX_BUSY: 3476 /* Retry it next time */ 3477 atomic_dec(&(pkt_dev->skb->users)); 3478 pkt_dev->last_ok = 0; 3479 } 3480 unlock: 3481 __netif_tx_unlock_bh(txq); 3482 3483 /* If pkt_dev->count is zero, then run forever */ 3484 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3485 pktgen_wait_for_skb(pkt_dev); 3486 3487 /* Done with this */ 3488 pktgen_stop_device(pkt_dev); 3489 } 3490 } 3491 3492 /* 3493 * Main loop of the thread goes here 3494 */ 3495 3496 static int pktgen_thread_worker(void *arg) 3497 { 3498 DEFINE_WAIT(wait); 3499 struct pktgen_thread *t = arg; 3500 struct pktgen_dev *pkt_dev = NULL; 3501 int cpu = t->cpu; 3502 3503 BUG_ON(smp_processor_id() != cpu); 3504 3505 init_waitqueue_head(&t->queue); 3506 complete(&t->start_done); 3507 3508 pr_debug("pktgen: starting pktgen/%d: pid=%d\n", 3509 cpu, task_pid_nr(current)); 3510 3511 set_current_state(TASK_INTERRUPTIBLE); 3512 3513 set_freezable(); 3514 3515 while (!kthread_should_stop()) { 3516 pkt_dev = next_to_run(t); 3517 3518 if (unlikely(!pkt_dev && t->control == 0)) { 3519 wait_event_interruptible_timeout(t->queue, 3520 t->control != 0, 3521 HZ/10); 3522 continue; 3523 } 3524 3525 __set_current_state(TASK_RUNNING); 3526 3527 if (likely(pkt_dev)) { 3528 pktgen_xmit(pkt_dev); 3529 3530 if (need_resched()) 3531 pktgen_resched(pkt_dev); 3532 else 3533 cpu_relax(); 3534 } 3535 3536 if (t->control & T_STOP) { 3537 pktgen_stop(t); 3538 t->control &= ~(T_STOP); 3539 } 3540 3541 if (t->control & T_RUN) { 3542 pktgen_run(t); 3543 t->control &= ~(T_RUN); 3544 } 3545 3546 if (t->control & T_REMDEVALL) { 3547 pktgen_rem_all_ifs(t); 3548 t->control &= ~(T_REMDEVALL); 3549 } 3550 3551 if (t->control & T_REMDEV) { 3552 pktgen_rem_one_if(t); 3553 t->control &= ~(T_REMDEV); 3554 } 3555 3556 try_to_freeze(); 3557 3558 set_current_state(TASK_INTERRUPTIBLE); 3559 } 3560 3561 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm); 3562 pktgen_stop(t); 3563 3564 pr_debug("pktgen: %s removing all device\n", t->tsk->comm); 3565 pktgen_rem_all_ifs(t); 3566 3567 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm); 3568 pktgen_rem_thread(t); 3569 3570 return 0; 3571 } 3572 3573 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3574 const char *ifname, bool exact) 3575 { 3576 struct pktgen_dev *p, *pkt_dev = NULL; 3577 size_t len = strlen(ifname); 3578 3579 if_lock(t); 3580 list_for_each_entry(p, &t->if_list, list) 3581 if (strncmp(p->odevname, ifname, len) == 0) { 3582 if (p->odevname[len]) { 3583 if (exact || p->odevname[len] != '@') 3584 continue; 3585 } 3586 pkt_dev = p; 3587 break; 3588 } 3589 3590 if_unlock(t); 3591 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev); 3592 return pkt_dev; 3593 } 3594 3595 /* 3596 * Adds a dev at front of if_list. 3597 */ 3598 3599 static int add_dev_to_thread(struct pktgen_thread *t, 3600 struct pktgen_dev *pkt_dev) 3601 { 3602 int rv = 0; 3603 3604 if_lock(t); 3605 3606 if (pkt_dev->pg_thread) { 3607 printk(KERN_ERR "pktgen: ERROR: already assigned " 3608 "to a thread.\n"); 3609 rv = -EBUSY; 3610 goto out; 3611 } 3612 3613 list_add(&pkt_dev->list, &t->if_list); 3614 pkt_dev->pg_thread = t; 3615 pkt_dev->running = 0; 3616 3617 out: 3618 if_unlock(t); 3619 return rv; 3620 } 3621 3622 /* Called under thread lock */ 3623 3624 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3625 { 3626 struct pktgen_dev *pkt_dev; 3627 int err; 3628 int node = cpu_to_node(t->cpu); 3629 3630 /* We don't allow a device to be on several threads */ 3631 3632 pkt_dev = __pktgen_NN_threads(ifname, FIND); 3633 if (pkt_dev) { 3634 printk(KERN_ERR "pktgen: ERROR: interface already used.\n"); 3635 return -EBUSY; 3636 } 3637 3638 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); 3639 if (!pkt_dev) 3640 return -ENOMEM; 3641 3642 strcpy(pkt_dev->odevname, ifname); 3643 pkt_dev->flows = vmalloc_node(MAX_CFLOWS * sizeof(struct flow_state), 3644 node); 3645 if (pkt_dev->flows == NULL) { 3646 kfree(pkt_dev); 3647 return -ENOMEM; 3648 } 3649 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state)); 3650 3651 pkt_dev->removal_mark = 0; 3652 pkt_dev->min_pkt_size = ETH_ZLEN; 3653 pkt_dev->max_pkt_size = ETH_ZLEN; 3654 pkt_dev->nfrags = 0; 3655 pkt_dev->clone_skb = pg_clone_skb_d; 3656 pkt_dev->delay = pg_delay_d; 3657 pkt_dev->count = pg_count_d; 3658 pkt_dev->sofar = 0; 3659 pkt_dev->udp_src_min = 9; /* sink port */ 3660 pkt_dev->udp_src_max = 9; 3661 pkt_dev->udp_dst_min = 9; 3662 pkt_dev->udp_dst_max = 9; 3663 3664 pkt_dev->vlan_p = 0; 3665 pkt_dev->vlan_cfi = 0; 3666 pkt_dev->vlan_id = 0xffff; 3667 pkt_dev->svlan_p = 0; 3668 pkt_dev->svlan_cfi = 0; 3669 pkt_dev->svlan_id = 0xffff; 3670 3671 err = pktgen_setup_dev(pkt_dev, ifname); 3672 if (err) 3673 goto out1; 3674 3675 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir, 3676 &pktgen_if_fops, pkt_dev); 3677 if (!pkt_dev->entry) { 3678 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n", 3679 PG_PROC_DIR, ifname); 3680 err = -EINVAL; 3681 goto out2; 3682 } 3683 #ifdef CONFIG_XFRM 3684 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3685 pkt_dev->ipsproto = IPPROTO_ESP; 3686 #endif 3687 3688 return add_dev_to_thread(t, pkt_dev); 3689 out2: 3690 dev_put(pkt_dev->odev); 3691 out1: 3692 #ifdef CONFIG_XFRM 3693 free_SAs(pkt_dev); 3694 #endif 3695 vfree(pkt_dev->flows); 3696 kfree(pkt_dev); 3697 return err; 3698 } 3699 3700 static int __init pktgen_create_thread(int cpu) 3701 { 3702 struct pktgen_thread *t; 3703 struct proc_dir_entry *pe; 3704 struct task_struct *p; 3705 3706 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL, 3707 cpu_to_node(cpu)); 3708 if (!t) { 3709 printk(KERN_ERR "pktgen: ERROR: out of memory, can't " 3710 "create new thread.\n"); 3711 return -ENOMEM; 3712 } 3713 3714 spin_lock_init(&t->if_lock); 3715 t->cpu = cpu; 3716 3717 INIT_LIST_HEAD(&t->if_list); 3718 3719 list_add_tail(&t->th_list, &pktgen_threads); 3720 init_completion(&t->start_done); 3721 3722 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu); 3723 if (IS_ERR(p)) { 3724 printk(KERN_ERR "pktgen: kernel_thread() failed " 3725 "for cpu %d\n", t->cpu); 3726 list_del(&t->th_list); 3727 kfree(t); 3728 return PTR_ERR(p); 3729 } 3730 kthread_bind(p, cpu); 3731 t->tsk = p; 3732 3733 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir, 3734 &pktgen_thread_fops, t); 3735 if (!pe) { 3736 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n", 3737 PG_PROC_DIR, t->tsk->comm); 3738 kthread_stop(p); 3739 list_del(&t->th_list); 3740 kfree(t); 3741 return -EINVAL; 3742 } 3743 3744 wake_up_process(p); 3745 wait_for_completion(&t->start_done); 3746 3747 return 0; 3748 } 3749 3750 /* 3751 * Removes a device from the thread if_list. 3752 */ 3753 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3754 struct pktgen_dev *pkt_dev) 3755 { 3756 struct list_head *q, *n; 3757 struct pktgen_dev *p; 3758 3759 list_for_each_safe(q, n, &t->if_list) { 3760 p = list_entry(q, struct pktgen_dev, list); 3761 if (p == pkt_dev) 3762 list_del(&p->list); 3763 } 3764 } 3765 3766 static int pktgen_remove_device(struct pktgen_thread *t, 3767 struct pktgen_dev *pkt_dev) 3768 { 3769 3770 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev); 3771 3772 if (pkt_dev->running) { 3773 printk(KERN_WARNING "pktgen: WARNING: trying to remove a " 3774 "running interface, stopping it now.\n"); 3775 pktgen_stop_device(pkt_dev); 3776 } 3777 3778 /* Dis-associate from the interface */ 3779 3780 if (pkt_dev->odev) { 3781 dev_put(pkt_dev->odev); 3782 pkt_dev->odev = NULL; 3783 } 3784 3785 /* And update the thread if_list */ 3786 3787 _rem_dev_from_if_list(t, pkt_dev); 3788 3789 if (pkt_dev->entry) 3790 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 3791 3792 #ifdef CONFIG_XFRM 3793 free_SAs(pkt_dev); 3794 #endif 3795 vfree(pkt_dev->flows); 3796 kfree(pkt_dev); 3797 return 0; 3798 } 3799 3800 static int __init pg_init(void) 3801 { 3802 int cpu; 3803 struct proc_dir_entry *pe; 3804 3805 printk(KERN_INFO "%s", version); 3806 3807 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net); 3808 if (!pg_proc_dir) 3809 return -ENODEV; 3810 3811 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops); 3812 if (pe == NULL) { 3813 printk(KERN_ERR "pktgen: ERROR: cannot create %s " 3814 "procfs entry.\n", PGCTRL); 3815 proc_net_remove(&init_net, PG_PROC_DIR); 3816 return -EINVAL; 3817 } 3818 3819 /* Register us to receive netdevice events */ 3820 register_netdevice_notifier(&pktgen_notifier_block); 3821 3822 for_each_online_cpu(cpu) { 3823 int err; 3824 3825 err = pktgen_create_thread(cpu); 3826 if (err) 3827 printk(KERN_WARNING "pktgen: WARNING: Cannot create " 3828 "thread for cpu %d (%d)\n", cpu, err); 3829 } 3830 3831 if (list_empty(&pktgen_threads)) { 3832 printk(KERN_ERR "pktgen: ERROR: Initialization failed for " 3833 "all threads\n"); 3834 unregister_netdevice_notifier(&pktgen_notifier_block); 3835 remove_proc_entry(PGCTRL, pg_proc_dir); 3836 proc_net_remove(&init_net, PG_PROC_DIR); 3837 return -ENODEV; 3838 } 3839 3840 return 0; 3841 } 3842 3843 static void __exit pg_cleanup(void) 3844 { 3845 struct pktgen_thread *t; 3846 struct list_head *q, *n; 3847 wait_queue_head_t queue; 3848 init_waitqueue_head(&queue); 3849 3850 /* Stop all interfaces & threads */ 3851 3852 list_for_each_safe(q, n, &pktgen_threads) { 3853 t = list_entry(q, struct pktgen_thread, th_list); 3854 kthread_stop(t->tsk); 3855 kfree(t); 3856 } 3857 3858 /* Un-register us from receiving netdevice events */ 3859 unregister_netdevice_notifier(&pktgen_notifier_block); 3860 3861 /* Clean up proc file system */ 3862 remove_proc_entry(PGCTRL, pg_proc_dir); 3863 proc_net_remove(&init_net, PG_PROC_DIR); 3864 } 3865 3866 module_init(pg_init); 3867 module_exit(pg_cleanup); 3868 3869 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); 3870 MODULE_DESCRIPTION("Packet Generator tool"); 3871 MODULE_LICENSE("GPL"); 3872 MODULE_VERSION(VERSION); 3873 module_param(pg_count_d, int, 0); 3874 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); 3875 module_param(pg_delay_d, int, 0); 3876 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); 3877 module_param(pg_clone_skb_d, int, 0); 3878 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); 3879 module_param(debug, int, 0); 3880 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); 3881