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 \ 173 "pktgen v2.70: Packet Generator for packet performance testing.\n" 174 175 #define IP_NAME_SZ 32 176 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */ 177 #define MPLS_STACK_BOTTOM htonl(0x00000100) 178 179 /* Device flag bits */ 180 #define F_IPSRC_RND (1<<0) /* IP-Src Random */ 181 #define F_IPDST_RND (1<<1) /* IP-Dst Random */ 182 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */ 183 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */ 184 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */ 185 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */ 186 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */ 187 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */ 188 #define F_MPLS_RND (1<<8) /* Random MPLS labels */ 189 #define F_VID_RND (1<<9) /* Random VLAN ID */ 190 #define F_SVID_RND (1<<10) /* Random SVLAN ID */ 191 #define F_FLOW_SEQ (1<<11) /* Sequential flows */ 192 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */ 193 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */ 194 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */ 195 196 /* Thread control flag bits */ 197 #define T_TERMINATE (1<<0) 198 #define T_STOP (1<<1) /* Stop run */ 199 #define T_RUN (1<<2) /* Start run */ 200 #define T_REMDEVALL (1<<3) /* Remove all devs */ 201 #define T_REMDEV (1<<4) /* Remove one dev */ 202 203 /* If lock -- can be removed after some work */ 204 #define if_lock(t) spin_lock(&(t->if_lock)); 205 #define if_unlock(t) spin_unlock(&(t->if_lock)); 206 207 /* Used to help with determining the pkts on receive */ 208 #define PKTGEN_MAGIC 0xbe9be955 209 #define PG_PROC_DIR "pktgen" 210 #define PGCTRL "pgctrl" 211 static struct proc_dir_entry *pg_proc_dir; 212 213 #define MAX_CFLOWS 65536 214 215 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4) 216 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4) 217 218 struct flow_state { 219 __be32 cur_daddr; 220 int count; 221 #ifdef CONFIG_XFRM 222 struct xfrm_state *x; 223 #endif 224 __u32 flags; 225 }; 226 227 /* flow flag bits */ 228 #define F_INIT (1<<0) /* flow has been initialized */ 229 230 struct pktgen_dev { 231 /* 232 * Try to keep frequent/infrequent used vars. separated. 233 */ 234 struct proc_dir_entry *entry; /* proc file */ 235 struct pktgen_thread *pg_thread;/* the owner */ 236 struct list_head list; /* chaining in the thread's run-queue */ 237 238 int running; /* if false, the test will stop */ 239 240 /* If min != max, then we will either do a linear iteration, or 241 * we will do a random selection from within the range. 242 */ 243 __u32 flags; 244 int removal_mark; /* non-zero => the device is marked for 245 * removal by worker thread */ 246 247 int min_pkt_size; /* = ETH_ZLEN; */ 248 int max_pkt_size; /* = ETH_ZLEN; */ 249 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */ 250 int nfrags; 251 u64 delay; /* nano-seconds */ 252 253 __u64 count; /* Default No packets to send */ 254 __u64 sofar; /* How many pkts we've sent so far */ 255 __u64 tx_bytes; /* How many bytes we've transmitted */ 256 __u64 errors; /* Errors when trying to transmit, 257 pkts will be re-sent */ 258 259 /* runtime counters relating to clone_skb */ 260 261 __u64 allocated_skbs; 262 __u32 clone_count; 263 int last_ok; /* Was last skb sent? 264 * Or a failed transmit of some sort? 265 * This will keep sequence numbers in order 266 */ 267 ktime_t next_tx; 268 ktime_t started_at; 269 ktime_t stopped_at; 270 u64 idle_acc; /* nano-seconds */ 271 272 __u32 seq_num; 273 274 int clone_skb; /* 275 * Use multiple SKBs during packet gen. 276 * If this number is greater than 1, then 277 * that many copies of the same packet will be 278 * sent before a new packet is allocated. 279 * If you want to send 1024 identical packets 280 * before creating a new packet, 281 * set clone_skb to 1024. 282 */ 283 284 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 285 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 286 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 287 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 288 289 struct in6_addr in6_saddr; 290 struct in6_addr in6_daddr; 291 struct in6_addr cur_in6_daddr; 292 struct in6_addr cur_in6_saddr; 293 /* For ranges */ 294 struct in6_addr min_in6_daddr; 295 struct in6_addr max_in6_daddr; 296 struct in6_addr min_in6_saddr; 297 struct in6_addr max_in6_saddr; 298 299 /* If we're doing ranges, random or incremental, then this 300 * defines the min/max for those ranges. 301 */ 302 __be32 saddr_min; /* inclusive, source IP address */ 303 __be32 saddr_max; /* exclusive, source IP address */ 304 __be32 daddr_min; /* inclusive, dest IP address */ 305 __be32 daddr_max; /* exclusive, dest IP address */ 306 307 __u16 udp_src_min; /* inclusive, source UDP port */ 308 __u16 udp_src_max; /* exclusive, source UDP port */ 309 __u16 udp_dst_min; /* inclusive, dest UDP port */ 310 __u16 udp_dst_max; /* exclusive, dest UDP port */ 311 312 /* DSCP + ECN */ 313 __u8 tos; /* six MSB of (former) IPv4 TOS 314 are for dscp codepoint */ 315 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 316 (see RFC 3260, sec. 4) */ 317 318 /* MPLS */ 319 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */ 320 __be32 labels[MAX_MPLS_LABELS]; 321 322 /* VLAN/SVLAN (802.1Q/Q-in-Q) */ 323 __u8 vlan_p; 324 __u8 vlan_cfi; 325 __u16 vlan_id; /* 0xffff means no vlan tag */ 326 327 __u8 svlan_p; 328 __u8 svlan_cfi; 329 __u16 svlan_id; /* 0xffff means no svlan tag */ 330 331 __u32 src_mac_count; /* How many MACs to iterate through */ 332 __u32 dst_mac_count; /* How many MACs to iterate through */ 333 334 unsigned char dst_mac[ETH_ALEN]; 335 unsigned char src_mac[ETH_ALEN]; 336 337 __u32 cur_dst_mac_offset; 338 __u32 cur_src_mac_offset; 339 __be32 cur_saddr; 340 __be32 cur_daddr; 341 __u16 cur_udp_dst; 342 __u16 cur_udp_src; 343 __u16 cur_queue_map; 344 __u32 cur_pkt_size; 345 346 __u8 hh[14]; 347 /* = { 348 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, 349 350 We fill in SRC address later 351 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 352 0x08, 0x00 353 }; 354 */ 355 __u16 pad; /* pad out the hh struct to an even 16 bytes */ 356 357 struct sk_buff *skb; /* skb we are to transmit next, used for when we 358 * are transmitting the same one multiple times 359 */ 360 struct net_device *odev; /* The out-going device. 361 * Note that the device should have it's 362 * pg_info pointer pointing back to this 363 * device. 364 * Set when the user specifies the out-going 365 * device name (not when the inject is 366 * started as it used to do.) 367 */ 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[] __initconst = VERSION; 426 427 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i); 428 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname); 429 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 430 const char *ifname); 431 static int pktgen_device_event(struct notifier_block *, unsigned long, void *); 432 static void pktgen_run_all_threads(void); 433 static void pktgen_reset_all_threads(void); 434 static void pktgen_stop_all_threads_ifs(void); 435 436 static void pktgen_stop(struct pktgen_thread *t); 437 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); 438 439 static unsigned int scan_ip6(const char *s, char ip[16]); 440 static unsigned int fmt_ip6(char *s, const char ip[16]); 441 442 /* Module parameters, defaults. */ 443 static int pg_count_d __read_mostly = 1000; 444 static int pg_delay_d __read_mostly; 445 static int pg_clone_skb_d __read_mostly; 446 static int debug __read_mostly; 447 448 static DEFINE_MUTEX(pktgen_thread_lock); 449 static LIST_HEAD(pktgen_threads); 450 451 static struct notifier_block pktgen_notifier_block = { 452 .notifier_call = pktgen_device_event, 453 }; 454 455 /* 456 * /proc handling functions 457 * 458 */ 459 460 static int pgctrl_show(struct seq_file *seq, void *v) 461 { 462 seq_puts(seq, VERSION); 463 return 0; 464 } 465 466 static ssize_t pgctrl_write(struct file *file, const char __user *buf, 467 size_t count, loff_t *ppos) 468 { 469 int err = 0; 470 char data[128]; 471 472 if (!capable(CAP_NET_ADMIN)) { 473 err = -EPERM; 474 goto out; 475 } 476 477 if (count > sizeof(data)) 478 count = sizeof(data); 479 480 if (copy_from_user(data, buf, count)) { 481 err = -EFAULT; 482 goto out; 483 } 484 data[count - 1] = 0; /* Make string */ 485 486 if (!strcmp(data, "stop")) 487 pktgen_stop_all_threads_ifs(); 488 489 else if (!strcmp(data, "start")) 490 pktgen_run_all_threads(); 491 492 else if (!strcmp(data, "reset")) 493 pktgen_reset_all_threads(); 494 495 else 496 printk(KERN_WARNING "pktgen: Unknown command: %s\n", data); 497 498 err = count; 499 500 out: 501 return err; 502 } 503 504 static int pgctrl_open(struct inode *inode, struct file *file) 505 { 506 return single_open(file, pgctrl_show, PDE(inode)->data); 507 } 508 509 static const struct file_operations pktgen_fops = { 510 .owner = THIS_MODULE, 511 .open = pgctrl_open, 512 .read = seq_read, 513 .llseek = seq_lseek, 514 .write = pgctrl_write, 515 .release = single_release, 516 }; 517 518 static int pktgen_if_show(struct seq_file *seq, void *v) 519 { 520 const struct pktgen_dev *pkt_dev = seq->private; 521 ktime_t stopped; 522 u64 idle; 523 524 seq_printf(seq, 525 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", 526 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, 527 pkt_dev->max_pkt_size); 528 529 seq_printf(seq, 530 " frags: %d delay: %llu clone_skb: %d ifname: %s\n", 531 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay, 532 pkt_dev->clone_skb, pkt_dev->odev->name); 533 534 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, 535 pkt_dev->lflow); 536 537 seq_printf(seq, 538 " queue_map_min: %u queue_map_max: %u\n", 539 pkt_dev->queue_map_min, 540 pkt_dev->queue_map_max); 541 542 if (pkt_dev->flags & F_IPV6) { 543 char b1[128], b2[128], b3[128]; 544 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr); 545 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr); 546 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr); 547 seq_printf(seq, 548 " saddr: %s min_saddr: %s max_saddr: %s\n", b1, 549 b2, b3); 550 551 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr); 552 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr); 553 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr); 554 seq_printf(seq, 555 " daddr: %s min_daddr: %s max_daddr: %s\n", b1, 556 b2, b3); 557 558 } else { 559 seq_printf(seq, 560 " dst_min: %s dst_max: %s\n", 561 pkt_dev->dst_min, pkt_dev->dst_max); 562 seq_printf(seq, 563 " src_min: %s src_max: %s\n", 564 pkt_dev->src_min, pkt_dev->src_max); 565 } 566 567 seq_puts(seq, " src_mac: "); 568 569 seq_printf(seq, "%pM ", 570 is_zero_ether_addr(pkt_dev->src_mac) ? 571 pkt_dev->odev->dev_addr : pkt_dev->src_mac); 572 573 seq_printf(seq, "dst_mac: "); 574 seq_printf(seq, "%pM\n", pkt_dev->dst_mac); 575 576 seq_printf(seq, 577 " udp_src_min: %d udp_src_max: %d" 578 " udp_dst_min: %d udp_dst_max: %d\n", 579 pkt_dev->udp_src_min, pkt_dev->udp_src_max, 580 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); 581 582 seq_printf(seq, 583 " src_mac_count: %d dst_mac_count: %d\n", 584 pkt_dev->src_mac_count, pkt_dev->dst_mac_count); 585 586 if (pkt_dev->nr_labels) { 587 unsigned i; 588 seq_printf(seq, " mpls: "); 589 for (i = 0; i < pkt_dev->nr_labels; i++) 590 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), 591 i == pkt_dev->nr_labels-1 ? "\n" : ", "); 592 } 593 594 if (pkt_dev->vlan_id != 0xffff) 595 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", 596 pkt_dev->vlan_id, pkt_dev->vlan_p, 597 pkt_dev->vlan_cfi); 598 599 if (pkt_dev->svlan_id != 0xffff) 600 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", 601 pkt_dev->svlan_id, pkt_dev->svlan_p, 602 pkt_dev->svlan_cfi); 603 604 if (pkt_dev->tos) 605 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); 606 607 if (pkt_dev->traffic_class) 608 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); 609 610 seq_printf(seq, " Flags: "); 611 612 if (pkt_dev->flags & F_IPV6) 613 seq_printf(seq, "IPV6 "); 614 615 if (pkt_dev->flags & F_IPSRC_RND) 616 seq_printf(seq, "IPSRC_RND "); 617 618 if (pkt_dev->flags & F_IPDST_RND) 619 seq_printf(seq, "IPDST_RND "); 620 621 if (pkt_dev->flags & F_TXSIZE_RND) 622 seq_printf(seq, "TXSIZE_RND "); 623 624 if (pkt_dev->flags & F_UDPSRC_RND) 625 seq_printf(seq, "UDPSRC_RND "); 626 627 if (pkt_dev->flags & F_UDPDST_RND) 628 seq_printf(seq, "UDPDST_RND "); 629 630 if (pkt_dev->flags & F_MPLS_RND) 631 seq_printf(seq, "MPLS_RND "); 632 633 if (pkt_dev->flags & F_QUEUE_MAP_RND) 634 seq_printf(seq, "QUEUE_MAP_RND "); 635 636 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 637 seq_printf(seq, "QUEUE_MAP_CPU "); 638 639 if (pkt_dev->cflows) { 640 if (pkt_dev->flags & F_FLOW_SEQ) 641 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/ 642 else 643 seq_printf(seq, "FLOW_RND "); 644 } 645 646 #ifdef CONFIG_XFRM 647 if (pkt_dev->flags & F_IPSEC_ON) 648 seq_printf(seq, "IPSEC "); 649 #endif 650 651 if (pkt_dev->flags & F_MACSRC_RND) 652 seq_printf(seq, "MACSRC_RND "); 653 654 if (pkt_dev->flags & F_MACDST_RND) 655 seq_printf(seq, "MACDST_RND "); 656 657 if (pkt_dev->flags & F_VID_RND) 658 seq_printf(seq, "VID_RND "); 659 660 if (pkt_dev->flags & F_SVID_RND) 661 seq_printf(seq, "SVID_RND "); 662 663 seq_puts(seq, "\n"); 664 665 /* not really stopped, more like last-running-at */ 666 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at; 667 idle = pkt_dev->idle_acc; 668 do_div(idle, NSEC_PER_USEC); 669 670 seq_printf(seq, 671 "Current:\n pkts-sofar: %llu errors: %llu\n", 672 (unsigned long long)pkt_dev->sofar, 673 (unsigned long long)pkt_dev->errors); 674 675 seq_printf(seq, 676 " started: %lluus stopped: %lluus idle: %lluus\n", 677 (unsigned long long) ktime_to_us(pkt_dev->started_at), 678 (unsigned long long) ktime_to_us(stopped), 679 (unsigned long long) idle); 680 681 seq_printf(seq, 682 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 683 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, 684 pkt_dev->cur_src_mac_offset); 685 686 if (pkt_dev->flags & F_IPV6) { 687 char b1[128], b2[128]; 688 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr); 689 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr); 690 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1); 691 } else 692 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n", 693 pkt_dev->cur_saddr, pkt_dev->cur_daddr); 694 695 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", 696 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 697 698 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); 699 700 seq_printf(seq, " flows: %u\n", pkt_dev->nflows); 701 702 if (pkt_dev->result[0]) 703 seq_printf(seq, "Result: %s\n", pkt_dev->result); 704 else 705 seq_printf(seq, "Result: Idle\n"); 706 707 return 0; 708 } 709 710 711 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, 712 __u32 *num) 713 { 714 int i = 0; 715 *num = 0; 716 717 for (; i < maxlen; i++) { 718 char c; 719 *num <<= 4; 720 if (get_user(c, &user_buffer[i])) 721 return -EFAULT; 722 if ((c >= '0') && (c <= '9')) 723 *num |= c - '0'; 724 else if ((c >= 'a') && (c <= 'f')) 725 *num |= c - 'a' + 10; 726 else if ((c >= 'A') && (c <= 'F')) 727 *num |= c - 'A' + 10; 728 else 729 break; 730 } 731 return i; 732 } 733 734 static int count_trail_chars(const char __user * user_buffer, 735 unsigned int maxlen) 736 { 737 int i; 738 739 for (i = 0; i < maxlen; i++) { 740 char c; 741 if (get_user(c, &user_buffer[i])) 742 return -EFAULT; 743 switch (c) { 744 case '\"': 745 case '\n': 746 case '\r': 747 case '\t': 748 case ' ': 749 case '=': 750 break; 751 default: 752 goto done; 753 } 754 } 755 done: 756 return i; 757 } 758 759 static unsigned long num_arg(const char __user * user_buffer, 760 unsigned long maxlen, unsigned long *num) 761 { 762 int i = 0; 763 *num = 0; 764 765 for (; i < maxlen; i++) { 766 char c; 767 if (get_user(c, &user_buffer[i])) 768 return -EFAULT; 769 if ((c >= '0') && (c <= '9')) { 770 *num *= 10; 771 *num += c - '0'; 772 } else 773 break; 774 } 775 return i; 776 } 777 778 static int strn_len(const char __user * user_buffer, unsigned int maxlen) 779 { 780 int i = 0; 781 782 for (; i < maxlen; i++) { 783 char c; 784 if (get_user(c, &user_buffer[i])) 785 return -EFAULT; 786 switch (c) { 787 case '\"': 788 case '\n': 789 case '\r': 790 case '\t': 791 case ' ': 792 goto done_str; 793 break; 794 default: 795 break; 796 } 797 } 798 done_str: 799 return i; 800 } 801 802 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) 803 { 804 unsigned n = 0; 805 char c; 806 ssize_t i = 0; 807 int len; 808 809 pkt_dev->nr_labels = 0; 810 do { 811 __u32 tmp; 812 len = hex32_arg(&buffer[i], 8, &tmp); 813 if (len <= 0) 814 return len; 815 pkt_dev->labels[n] = htonl(tmp); 816 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 817 pkt_dev->flags |= F_MPLS_RND; 818 i += len; 819 if (get_user(c, &buffer[i])) 820 return -EFAULT; 821 i++; 822 n++; 823 if (n >= MAX_MPLS_LABELS) 824 return -E2BIG; 825 } while (c == ','); 826 827 pkt_dev->nr_labels = n; 828 return i; 829 } 830 831 static ssize_t pktgen_if_write(struct file *file, 832 const char __user * user_buffer, size_t count, 833 loff_t * offset) 834 { 835 struct seq_file *seq = (struct seq_file *)file->private_data; 836 struct pktgen_dev *pkt_dev = seq->private; 837 int i = 0, max, len; 838 char name[16], valstr[32]; 839 unsigned long value = 0; 840 char *pg_result = NULL; 841 int tmp = 0; 842 char buf[128]; 843 844 pg_result = &(pkt_dev->result[0]); 845 846 if (count < 1) { 847 printk(KERN_WARNING "pktgen: wrong command format\n"); 848 return -EINVAL; 849 } 850 851 max = count - i; 852 tmp = count_trail_chars(&user_buffer[i], max); 853 if (tmp < 0) { 854 printk(KERN_WARNING "pktgen: illegal format\n"); 855 return tmp; 856 } 857 i += tmp; 858 859 /* Read variable name */ 860 861 len = strn_len(&user_buffer[i], sizeof(name) - 1); 862 if (len < 0) 863 return len; 864 865 memset(name, 0, sizeof(name)); 866 if (copy_from_user(name, &user_buffer[i], len)) 867 return -EFAULT; 868 i += len; 869 870 max = count - i; 871 len = count_trail_chars(&user_buffer[i], max); 872 if (len < 0) 873 return len; 874 875 i += len; 876 877 if (debug) { 878 char tb[count + 1]; 879 if (copy_from_user(tb, user_buffer, count)) 880 return -EFAULT; 881 tb[count] = 0; 882 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name, 883 (unsigned long)count, tb); 884 } 885 886 if (!strcmp(name, "min_pkt_size")) { 887 len = num_arg(&user_buffer[i], 10, &value); 888 if (len < 0) 889 return len; 890 891 i += len; 892 if (value < 14 + 20 + 8) 893 value = 14 + 20 + 8; 894 if (value != pkt_dev->min_pkt_size) { 895 pkt_dev->min_pkt_size = value; 896 pkt_dev->cur_pkt_size = value; 897 } 898 sprintf(pg_result, "OK: min_pkt_size=%u", 899 pkt_dev->min_pkt_size); 900 return count; 901 } 902 903 if (!strcmp(name, "max_pkt_size")) { 904 len = num_arg(&user_buffer[i], 10, &value); 905 if (len < 0) 906 return len; 907 908 i += len; 909 if (value < 14 + 20 + 8) 910 value = 14 + 20 + 8; 911 if (value != pkt_dev->max_pkt_size) { 912 pkt_dev->max_pkt_size = value; 913 pkt_dev->cur_pkt_size = value; 914 } 915 sprintf(pg_result, "OK: max_pkt_size=%u", 916 pkt_dev->max_pkt_size); 917 return count; 918 } 919 920 /* Shortcut for min = max */ 921 922 if (!strcmp(name, "pkt_size")) { 923 len = num_arg(&user_buffer[i], 10, &value); 924 if (len < 0) 925 return len; 926 927 i += len; 928 if (value < 14 + 20 + 8) 929 value = 14 + 20 + 8; 930 if (value != pkt_dev->min_pkt_size) { 931 pkt_dev->min_pkt_size = value; 932 pkt_dev->max_pkt_size = value; 933 pkt_dev->cur_pkt_size = value; 934 } 935 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 936 return count; 937 } 938 939 if (!strcmp(name, "debug")) { 940 len = num_arg(&user_buffer[i], 10, &value); 941 if (len < 0) 942 return len; 943 944 i += len; 945 debug = value; 946 sprintf(pg_result, "OK: debug=%u", debug); 947 return count; 948 } 949 950 if (!strcmp(name, "frags")) { 951 len = num_arg(&user_buffer[i], 10, &value); 952 if (len < 0) 953 return len; 954 955 i += len; 956 pkt_dev->nfrags = value; 957 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 958 return count; 959 } 960 if (!strcmp(name, "delay")) { 961 len = num_arg(&user_buffer[i], 10, &value); 962 if (len < 0) 963 return len; 964 965 i += len; 966 if (value == 0x7FFFFFFF) 967 pkt_dev->delay = ULLONG_MAX; 968 else 969 pkt_dev->delay = (u64)value * NSEC_PER_USEC; 970 971 sprintf(pg_result, "OK: delay=%llu", 972 (unsigned long long) pkt_dev->delay); 973 return count; 974 } 975 if (!strcmp(name, "udp_src_min")) { 976 len = num_arg(&user_buffer[i], 10, &value); 977 if (len < 0) 978 return len; 979 980 i += len; 981 if (value != pkt_dev->udp_src_min) { 982 pkt_dev->udp_src_min = value; 983 pkt_dev->cur_udp_src = value; 984 } 985 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 986 return count; 987 } 988 if (!strcmp(name, "udp_dst_min")) { 989 len = num_arg(&user_buffer[i], 10, &value); 990 if (len < 0) 991 return len; 992 993 i += len; 994 if (value != pkt_dev->udp_dst_min) { 995 pkt_dev->udp_dst_min = value; 996 pkt_dev->cur_udp_dst = value; 997 } 998 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 999 return count; 1000 } 1001 if (!strcmp(name, "udp_src_max")) { 1002 len = num_arg(&user_buffer[i], 10, &value); 1003 if (len < 0) 1004 return len; 1005 1006 i += len; 1007 if (value != pkt_dev->udp_src_max) { 1008 pkt_dev->udp_src_max = value; 1009 pkt_dev->cur_udp_src = value; 1010 } 1011 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 1012 return count; 1013 } 1014 if (!strcmp(name, "udp_dst_max")) { 1015 len = num_arg(&user_buffer[i], 10, &value); 1016 if (len < 0) 1017 return len; 1018 1019 i += len; 1020 if (value != pkt_dev->udp_dst_max) { 1021 pkt_dev->udp_dst_max = value; 1022 pkt_dev->cur_udp_dst = value; 1023 } 1024 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1025 return count; 1026 } 1027 if (!strcmp(name, "clone_skb")) { 1028 len = num_arg(&user_buffer[i], 10, &value); 1029 if (len < 0) 1030 return len; 1031 1032 i += len; 1033 pkt_dev->clone_skb = value; 1034 1035 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1036 return count; 1037 } 1038 if (!strcmp(name, "count")) { 1039 len = num_arg(&user_buffer[i], 10, &value); 1040 if (len < 0) 1041 return len; 1042 1043 i += len; 1044 pkt_dev->count = value; 1045 sprintf(pg_result, "OK: count=%llu", 1046 (unsigned long long)pkt_dev->count); 1047 return count; 1048 } 1049 if (!strcmp(name, "src_mac_count")) { 1050 len = num_arg(&user_buffer[i], 10, &value); 1051 if (len < 0) 1052 return len; 1053 1054 i += len; 1055 if (pkt_dev->src_mac_count != value) { 1056 pkt_dev->src_mac_count = value; 1057 pkt_dev->cur_src_mac_offset = 0; 1058 } 1059 sprintf(pg_result, "OK: src_mac_count=%d", 1060 pkt_dev->src_mac_count); 1061 return count; 1062 } 1063 if (!strcmp(name, "dst_mac_count")) { 1064 len = num_arg(&user_buffer[i], 10, &value); 1065 if (len < 0) 1066 return len; 1067 1068 i += len; 1069 if (pkt_dev->dst_mac_count != value) { 1070 pkt_dev->dst_mac_count = value; 1071 pkt_dev->cur_dst_mac_offset = 0; 1072 } 1073 sprintf(pg_result, "OK: dst_mac_count=%d", 1074 pkt_dev->dst_mac_count); 1075 return count; 1076 } 1077 if (!strcmp(name, "flag")) { 1078 char f[32]; 1079 memset(f, 0, 32); 1080 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1081 if (len < 0) 1082 return len; 1083 1084 if (copy_from_user(f, &user_buffer[i], len)) 1085 return -EFAULT; 1086 i += len; 1087 if (strcmp(f, "IPSRC_RND") == 0) 1088 pkt_dev->flags |= F_IPSRC_RND; 1089 1090 else if (strcmp(f, "!IPSRC_RND") == 0) 1091 pkt_dev->flags &= ~F_IPSRC_RND; 1092 1093 else if (strcmp(f, "TXSIZE_RND") == 0) 1094 pkt_dev->flags |= F_TXSIZE_RND; 1095 1096 else if (strcmp(f, "!TXSIZE_RND") == 0) 1097 pkt_dev->flags &= ~F_TXSIZE_RND; 1098 1099 else if (strcmp(f, "IPDST_RND") == 0) 1100 pkt_dev->flags |= F_IPDST_RND; 1101 1102 else if (strcmp(f, "!IPDST_RND") == 0) 1103 pkt_dev->flags &= ~F_IPDST_RND; 1104 1105 else if (strcmp(f, "UDPSRC_RND") == 0) 1106 pkt_dev->flags |= F_UDPSRC_RND; 1107 1108 else if (strcmp(f, "!UDPSRC_RND") == 0) 1109 pkt_dev->flags &= ~F_UDPSRC_RND; 1110 1111 else if (strcmp(f, "UDPDST_RND") == 0) 1112 pkt_dev->flags |= F_UDPDST_RND; 1113 1114 else if (strcmp(f, "!UDPDST_RND") == 0) 1115 pkt_dev->flags &= ~F_UDPDST_RND; 1116 1117 else if (strcmp(f, "MACSRC_RND") == 0) 1118 pkt_dev->flags |= F_MACSRC_RND; 1119 1120 else if (strcmp(f, "!MACSRC_RND") == 0) 1121 pkt_dev->flags &= ~F_MACSRC_RND; 1122 1123 else if (strcmp(f, "MACDST_RND") == 0) 1124 pkt_dev->flags |= F_MACDST_RND; 1125 1126 else if (strcmp(f, "!MACDST_RND") == 0) 1127 pkt_dev->flags &= ~F_MACDST_RND; 1128 1129 else if (strcmp(f, "MPLS_RND") == 0) 1130 pkt_dev->flags |= F_MPLS_RND; 1131 1132 else if (strcmp(f, "!MPLS_RND") == 0) 1133 pkt_dev->flags &= ~F_MPLS_RND; 1134 1135 else if (strcmp(f, "VID_RND") == 0) 1136 pkt_dev->flags |= F_VID_RND; 1137 1138 else if (strcmp(f, "!VID_RND") == 0) 1139 pkt_dev->flags &= ~F_VID_RND; 1140 1141 else if (strcmp(f, "SVID_RND") == 0) 1142 pkt_dev->flags |= F_SVID_RND; 1143 1144 else if (strcmp(f, "!SVID_RND") == 0) 1145 pkt_dev->flags &= ~F_SVID_RND; 1146 1147 else if (strcmp(f, "FLOW_SEQ") == 0) 1148 pkt_dev->flags |= F_FLOW_SEQ; 1149 1150 else if (strcmp(f, "QUEUE_MAP_RND") == 0) 1151 pkt_dev->flags |= F_QUEUE_MAP_RND; 1152 1153 else if (strcmp(f, "!QUEUE_MAP_RND") == 0) 1154 pkt_dev->flags &= ~F_QUEUE_MAP_RND; 1155 1156 else if (strcmp(f, "QUEUE_MAP_CPU") == 0) 1157 pkt_dev->flags |= F_QUEUE_MAP_CPU; 1158 1159 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0) 1160 pkt_dev->flags &= ~F_QUEUE_MAP_CPU; 1161 #ifdef CONFIG_XFRM 1162 else if (strcmp(f, "IPSEC") == 0) 1163 pkt_dev->flags |= F_IPSEC_ON; 1164 #endif 1165 1166 else if (strcmp(f, "!IPV6") == 0) 1167 pkt_dev->flags &= ~F_IPV6; 1168 1169 else { 1170 sprintf(pg_result, 1171 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1172 f, 1173 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1174 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC\n"); 1175 return count; 1176 } 1177 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1178 return count; 1179 } 1180 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1181 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1182 if (len < 0) 1183 return len; 1184 1185 if (copy_from_user(buf, &user_buffer[i], len)) 1186 return -EFAULT; 1187 buf[len] = 0; 1188 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1189 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1190 strncpy(pkt_dev->dst_min, buf, len); 1191 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1192 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1193 } 1194 if (debug) 1195 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n", 1196 pkt_dev->dst_min); 1197 i += len; 1198 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1199 return count; 1200 } 1201 if (!strcmp(name, "dst_max")) { 1202 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1203 if (len < 0) 1204 return len; 1205 1206 1207 if (copy_from_user(buf, &user_buffer[i], len)) 1208 return -EFAULT; 1209 1210 buf[len] = 0; 1211 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1212 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1213 strncpy(pkt_dev->dst_max, buf, len); 1214 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1215 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1216 } 1217 if (debug) 1218 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n", 1219 pkt_dev->dst_max); 1220 i += len; 1221 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1222 return count; 1223 } 1224 if (!strcmp(name, "dst6")) { 1225 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1226 if (len < 0) 1227 return len; 1228 1229 pkt_dev->flags |= F_IPV6; 1230 1231 if (copy_from_user(buf, &user_buffer[i], len)) 1232 return -EFAULT; 1233 buf[len] = 0; 1234 1235 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1236 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1237 1238 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr); 1239 1240 if (debug) 1241 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf); 1242 1243 i += len; 1244 sprintf(pg_result, "OK: dst6=%s", buf); 1245 return count; 1246 } 1247 if (!strcmp(name, "dst6_min")) { 1248 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1249 if (len < 0) 1250 return len; 1251 1252 pkt_dev->flags |= F_IPV6; 1253 1254 if (copy_from_user(buf, &user_buffer[i], len)) 1255 return -EFAULT; 1256 buf[len] = 0; 1257 1258 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1259 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1260 1261 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, 1262 &pkt_dev->min_in6_daddr); 1263 if (debug) 1264 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf); 1265 1266 i += len; 1267 sprintf(pg_result, "OK: dst6_min=%s", buf); 1268 return count; 1269 } 1270 if (!strcmp(name, "dst6_max")) { 1271 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1272 if (len < 0) 1273 return len; 1274 1275 pkt_dev->flags |= F_IPV6; 1276 1277 if (copy_from_user(buf, &user_buffer[i], len)) 1278 return -EFAULT; 1279 buf[len] = 0; 1280 1281 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1282 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1283 1284 if (debug) 1285 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf); 1286 1287 i += len; 1288 sprintf(pg_result, "OK: dst6_max=%s", buf); 1289 return count; 1290 } 1291 if (!strcmp(name, "src6")) { 1292 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1293 if (len < 0) 1294 return len; 1295 1296 pkt_dev->flags |= F_IPV6; 1297 1298 if (copy_from_user(buf, &user_buffer[i], len)) 1299 return -EFAULT; 1300 buf[len] = 0; 1301 1302 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1303 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1304 1305 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr); 1306 1307 if (debug) 1308 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf); 1309 1310 i += len; 1311 sprintf(pg_result, "OK: src6=%s", buf); 1312 return count; 1313 } 1314 if (!strcmp(name, "src_min")) { 1315 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1316 if (len < 0) 1317 return len; 1318 1319 if (copy_from_user(buf, &user_buffer[i], len)) 1320 return -EFAULT; 1321 buf[len] = 0; 1322 if (strcmp(buf, pkt_dev->src_min) != 0) { 1323 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1324 strncpy(pkt_dev->src_min, buf, len); 1325 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1326 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1327 } 1328 if (debug) 1329 printk(KERN_DEBUG "pktgen: src_min set to: %s\n", 1330 pkt_dev->src_min); 1331 i += len; 1332 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1333 return count; 1334 } 1335 if (!strcmp(name, "src_max")) { 1336 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1337 if (len < 0) 1338 return len; 1339 1340 if (copy_from_user(buf, &user_buffer[i], len)) 1341 return -EFAULT; 1342 buf[len] = 0; 1343 if (strcmp(buf, pkt_dev->src_max) != 0) { 1344 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1345 strncpy(pkt_dev->src_max, buf, len); 1346 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1347 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1348 } 1349 if (debug) 1350 printk(KERN_DEBUG "pktgen: src_max set to: %s\n", 1351 pkt_dev->src_max); 1352 i += len; 1353 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1354 return count; 1355 } 1356 if (!strcmp(name, "dst_mac")) { 1357 char *v = valstr; 1358 unsigned char old_dmac[ETH_ALEN]; 1359 unsigned char *m = pkt_dev->dst_mac; 1360 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN); 1361 1362 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1363 if (len < 0) 1364 return len; 1365 1366 memset(valstr, 0, sizeof(valstr)); 1367 if (copy_from_user(valstr, &user_buffer[i], len)) 1368 return -EFAULT; 1369 i += len; 1370 1371 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) { 1372 if (*v >= '0' && *v <= '9') { 1373 *m *= 16; 1374 *m += *v - '0'; 1375 } 1376 if (*v >= 'A' && *v <= 'F') { 1377 *m *= 16; 1378 *m += *v - 'A' + 10; 1379 } 1380 if (*v >= 'a' && *v <= 'f') { 1381 *m *= 16; 1382 *m += *v - 'a' + 10; 1383 } 1384 if (*v == ':') { 1385 m++; 1386 *m = 0; 1387 } 1388 } 1389 1390 /* Set up Dest MAC */ 1391 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac)) 1392 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 1393 1394 sprintf(pg_result, "OK: dstmac"); 1395 return count; 1396 } 1397 if (!strcmp(name, "src_mac")) { 1398 char *v = valstr; 1399 unsigned char old_smac[ETH_ALEN]; 1400 unsigned char *m = pkt_dev->src_mac; 1401 1402 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN); 1403 1404 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1405 if (len < 0) 1406 return len; 1407 1408 memset(valstr, 0, sizeof(valstr)); 1409 if (copy_from_user(valstr, &user_buffer[i], len)) 1410 return -EFAULT; 1411 i += len; 1412 1413 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) { 1414 if (*v >= '0' && *v <= '9') { 1415 *m *= 16; 1416 *m += *v - '0'; 1417 } 1418 if (*v >= 'A' && *v <= 'F') { 1419 *m *= 16; 1420 *m += *v - 'A' + 10; 1421 } 1422 if (*v >= 'a' && *v <= 'f') { 1423 *m *= 16; 1424 *m += *v - 'a' + 10; 1425 } 1426 if (*v == ':') { 1427 m++; 1428 *m = 0; 1429 } 1430 } 1431 1432 /* Set up Src MAC */ 1433 if (compare_ether_addr(old_smac, pkt_dev->src_mac)) 1434 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN); 1435 1436 sprintf(pg_result, "OK: srcmac"); 1437 return count; 1438 } 1439 1440 if (!strcmp(name, "clear_counters")) { 1441 pktgen_clear_counters(pkt_dev); 1442 sprintf(pg_result, "OK: Clearing counters.\n"); 1443 return count; 1444 } 1445 1446 if (!strcmp(name, "flows")) { 1447 len = num_arg(&user_buffer[i], 10, &value); 1448 if (len < 0) 1449 return len; 1450 1451 i += len; 1452 if (value > MAX_CFLOWS) 1453 value = MAX_CFLOWS; 1454 1455 pkt_dev->cflows = value; 1456 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1457 return count; 1458 } 1459 1460 if (!strcmp(name, "flowlen")) { 1461 len = num_arg(&user_buffer[i], 10, &value); 1462 if (len < 0) 1463 return len; 1464 1465 i += len; 1466 pkt_dev->lflow = value; 1467 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1468 return count; 1469 } 1470 1471 if (!strcmp(name, "queue_map_min")) { 1472 len = num_arg(&user_buffer[i], 5, &value); 1473 if (len < 0) 1474 return len; 1475 1476 i += len; 1477 pkt_dev->queue_map_min = value; 1478 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1479 return count; 1480 } 1481 1482 if (!strcmp(name, "queue_map_max")) { 1483 len = num_arg(&user_buffer[i], 5, &value); 1484 if (len < 0) 1485 return len; 1486 1487 i += len; 1488 pkt_dev->queue_map_max = value; 1489 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1490 return count; 1491 } 1492 1493 if (!strcmp(name, "mpls")) { 1494 unsigned n, cnt; 1495 1496 len = get_labels(&user_buffer[i], pkt_dev); 1497 if (len < 0) 1498 return len; 1499 i += len; 1500 cnt = sprintf(pg_result, "OK: mpls="); 1501 for (n = 0; n < pkt_dev->nr_labels; n++) 1502 cnt += sprintf(pg_result + cnt, 1503 "%08x%s", ntohl(pkt_dev->labels[n]), 1504 n == pkt_dev->nr_labels-1 ? "" : ","); 1505 1506 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1507 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1508 pkt_dev->svlan_id = 0xffff; 1509 1510 if (debug) 1511 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n"); 1512 } 1513 return count; 1514 } 1515 1516 if (!strcmp(name, "vlan_id")) { 1517 len = num_arg(&user_buffer[i], 4, &value); 1518 if (len < 0) 1519 return len; 1520 1521 i += len; 1522 if (value <= 4095) { 1523 pkt_dev->vlan_id = value; /* turn on VLAN */ 1524 1525 if (debug) 1526 printk(KERN_DEBUG "pktgen: VLAN turned on\n"); 1527 1528 if (debug && pkt_dev->nr_labels) 1529 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1530 1531 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1532 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1533 } else { 1534 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1535 pkt_dev->svlan_id = 0xffff; 1536 1537 if (debug) 1538 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1539 } 1540 return count; 1541 } 1542 1543 if (!strcmp(name, "vlan_p")) { 1544 len = num_arg(&user_buffer[i], 1, &value); 1545 if (len < 0) 1546 return len; 1547 1548 i += len; 1549 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1550 pkt_dev->vlan_p = value; 1551 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1552 } else { 1553 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1554 } 1555 return count; 1556 } 1557 1558 if (!strcmp(name, "vlan_cfi")) { 1559 len = num_arg(&user_buffer[i], 1, &value); 1560 if (len < 0) 1561 return len; 1562 1563 i += len; 1564 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1565 pkt_dev->vlan_cfi = value; 1566 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1567 } else { 1568 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1569 } 1570 return count; 1571 } 1572 1573 if (!strcmp(name, "svlan_id")) { 1574 len = num_arg(&user_buffer[i], 4, &value); 1575 if (len < 0) 1576 return len; 1577 1578 i += len; 1579 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1580 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1581 1582 if (debug) 1583 printk(KERN_DEBUG "pktgen: SVLAN turned on\n"); 1584 1585 if (debug && pkt_dev->nr_labels) 1586 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1587 1588 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1589 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1590 } else { 1591 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1592 pkt_dev->svlan_id = 0xffff; 1593 1594 if (debug) 1595 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1596 } 1597 return count; 1598 } 1599 1600 if (!strcmp(name, "svlan_p")) { 1601 len = num_arg(&user_buffer[i], 1, &value); 1602 if (len < 0) 1603 return len; 1604 1605 i += len; 1606 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1607 pkt_dev->svlan_p = value; 1608 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1609 } else { 1610 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1611 } 1612 return count; 1613 } 1614 1615 if (!strcmp(name, "svlan_cfi")) { 1616 len = num_arg(&user_buffer[i], 1, &value); 1617 if (len < 0) 1618 return len; 1619 1620 i += len; 1621 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1622 pkt_dev->svlan_cfi = value; 1623 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1624 } else { 1625 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1626 } 1627 return count; 1628 } 1629 1630 if (!strcmp(name, "tos")) { 1631 __u32 tmp_value = 0; 1632 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1633 if (len < 0) 1634 return len; 1635 1636 i += len; 1637 if (len == 2) { 1638 pkt_dev->tos = tmp_value; 1639 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1640 } else { 1641 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1642 } 1643 return count; 1644 } 1645 1646 if (!strcmp(name, "traffic_class")) { 1647 __u32 tmp_value = 0; 1648 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1649 if (len < 0) 1650 return len; 1651 1652 i += len; 1653 if (len == 2) { 1654 pkt_dev->traffic_class = tmp_value; 1655 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1656 } else { 1657 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1658 } 1659 return count; 1660 } 1661 1662 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1663 return -EINVAL; 1664 } 1665 1666 static int pktgen_if_open(struct inode *inode, struct file *file) 1667 { 1668 return single_open(file, pktgen_if_show, PDE(inode)->data); 1669 } 1670 1671 static const struct file_operations pktgen_if_fops = { 1672 .owner = THIS_MODULE, 1673 .open = pktgen_if_open, 1674 .read = seq_read, 1675 .llseek = seq_lseek, 1676 .write = pktgen_if_write, 1677 .release = single_release, 1678 }; 1679 1680 static int pktgen_thread_show(struct seq_file *seq, void *v) 1681 { 1682 struct pktgen_thread *t = seq->private; 1683 const struct pktgen_dev *pkt_dev; 1684 1685 BUG_ON(!t); 1686 1687 seq_printf(seq, "Running: "); 1688 1689 if_lock(t); 1690 list_for_each_entry(pkt_dev, &t->if_list, list) 1691 if (pkt_dev->running) 1692 seq_printf(seq, "%s ", pkt_dev->odev->name); 1693 1694 seq_printf(seq, "\nStopped: "); 1695 1696 list_for_each_entry(pkt_dev, &t->if_list, list) 1697 if (!pkt_dev->running) 1698 seq_printf(seq, "%s ", pkt_dev->odev->name); 1699 1700 if (t->result[0]) 1701 seq_printf(seq, "\nResult: %s\n", t->result); 1702 else 1703 seq_printf(seq, "\nResult: NA\n"); 1704 1705 if_unlock(t); 1706 1707 return 0; 1708 } 1709 1710 static ssize_t pktgen_thread_write(struct file *file, 1711 const char __user * user_buffer, 1712 size_t count, loff_t * offset) 1713 { 1714 struct seq_file *seq = (struct seq_file *)file->private_data; 1715 struct pktgen_thread *t = seq->private; 1716 int i = 0, max, len, ret; 1717 char name[40]; 1718 char *pg_result; 1719 1720 if (count < 1) { 1721 // sprintf(pg_result, "Wrong command format"); 1722 return -EINVAL; 1723 } 1724 1725 max = count - i; 1726 len = count_trail_chars(&user_buffer[i], max); 1727 if (len < 0) 1728 return len; 1729 1730 i += len; 1731 1732 /* Read variable name */ 1733 1734 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1735 if (len < 0) 1736 return len; 1737 1738 memset(name, 0, sizeof(name)); 1739 if (copy_from_user(name, &user_buffer[i], len)) 1740 return -EFAULT; 1741 i += len; 1742 1743 max = count - i; 1744 len = count_trail_chars(&user_buffer[i], max); 1745 if (len < 0) 1746 return len; 1747 1748 i += len; 1749 1750 if (debug) 1751 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n", 1752 name, (unsigned long)count); 1753 1754 if (!t) { 1755 printk(KERN_ERR "pktgen: ERROR: No thread\n"); 1756 ret = -EINVAL; 1757 goto out; 1758 } 1759 1760 pg_result = &(t->result[0]); 1761 1762 if (!strcmp(name, "add_device")) { 1763 char f[32]; 1764 memset(f, 0, 32); 1765 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1766 if (len < 0) { 1767 ret = len; 1768 goto out; 1769 } 1770 if (copy_from_user(f, &user_buffer[i], len)) 1771 return -EFAULT; 1772 i += len; 1773 mutex_lock(&pktgen_thread_lock); 1774 pktgen_add_device(t, f); 1775 mutex_unlock(&pktgen_thread_lock); 1776 ret = count; 1777 sprintf(pg_result, "OK: add_device=%s", f); 1778 goto out; 1779 } 1780 1781 if (!strcmp(name, "rem_device_all")) { 1782 mutex_lock(&pktgen_thread_lock); 1783 t->control |= T_REMDEVALL; 1784 mutex_unlock(&pktgen_thread_lock); 1785 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1786 ret = count; 1787 sprintf(pg_result, "OK: rem_device_all"); 1788 goto out; 1789 } 1790 1791 if (!strcmp(name, "max_before_softirq")) { 1792 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1793 ret = count; 1794 goto out; 1795 } 1796 1797 ret = -EINVAL; 1798 out: 1799 return ret; 1800 } 1801 1802 static int pktgen_thread_open(struct inode *inode, struct file *file) 1803 { 1804 return single_open(file, pktgen_thread_show, PDE(inode)->data); 1805 } 1806 1807 static const struct file_operations pktgen_thread_fops = { 1808 .owner = THIS_MODULE, 1809 .open = pktgen_thread_open, 1810 .read = seq_read, 1811 .llseek = seq_lseek, 1812 .write = pktgen_thread_write, 1813 .release = single_release, 1814 }; 1815 1816 /* Think find or remove for NN */ 1817 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove) 1818 { 1819 struct pktgen_thread *t; 1820 struct pktgen_dev *pkt_dev = NULL; 1821 1822 list_for_each_entry(t, &pktgen_threads, th_list) { 1823 pkt_dev = pktgen_find_dev(t, ifname); 1824 if (pkt_dev) { 1825 if (remove) { 1826 if_lock(t); 1827 pkt_dev->removal_mark = 1; 1828 t->control |= T_REMDEV; 1829 if_unlock(t); 1830 } 1831 break; 1832 } 1833 } 1834 return pkt_dev; 1835 } 1836 1837 /* 1838 * mark a device for removal 1839 */ 1840 static void pktgen_mark_device(const char *ifname) 1841 { 1842 struct pktgen_dev *pkt_dev = NULL; 1843 const int max_tries = 10, msec_per_try = 125; 1844 int i = 0; 1845 1846 mutex_lock(&pktgen_thread_lock); 1847 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname); 1848 1849 while (1) { 1850 1851 pkt_dev = __pktgen_NN_threads(ifname, REMOVE); 1852 if (pkt_dev == NULL) 1853 break; /* success */ 1854 1855 mutex_unlock(&pktgen_thread_lock); 1856 pr_debug("pktgen: pktgen_mark_device waiting for %s " 1857 "to disappear....\n", ifname); 1858 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1859 mutex_lock(&pktgen_thread_lock); 1860 1861 if (++i >= max_tries) { 1862 printk(KERN_ERR "pktgen_mark_device: timed out after " 1863 "waiting %d msec for device %s to be removed\n", 1864 msec_per_try * i, ifname); 1865 break; 1866 } 1867 1868 } 1869 1870 mutex_unlock(&pktgen_thread_lock); 1871 } 1872 1873 static void pktgen_change_name(struct net_device *dev) 1874 { 1875 struct pktgen_thread *t; 1876 1877 list_for_each_entry(t, &pktgen_threads, th_list) { 1878 struct pktgen_dev *pkt_dev; 1879 1880 list_for_each_entry(pkt_dev, &t->if_list, list) { 1881 if (pkt_dev->odev != dev) 1882 continue; 1883 1884 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 1885 1886 pkt_dev->entry = create_proc_entry(dev->name, 0600, 1887 pg_proc_dir); 1888 if (!pkt_dev->entry) 1889 printk(KERN_ERR "pktgen: can't move proc " 1890 " entry for '%s'\n", dev->name); 1891 break; 1892 } 1893 } 1894 } 1895 1896 static int pktgen_device_event(struct notifier_block *unused, 1897 unsigned long event, void *ptr) 1898 { 1899 struct net_device *dev = ptr; 1900 1901 if (!net_eq(dev_net(dev), &init_net)) 1902 return NOTIFY_DONE; 1903 1904 /* It is OK that we do not hold the group lock right now, 1905 * as we run under the RTNL lock. 1906 */ 1907 1908 switch (event) { 1909 case NETDEV_CHANGENAME: 1910 pktgen_change_name(dev); 1911 break; 1912 1913 case NETDEV_UNREGISTER: 1914 pktgen_mark_device(dev->name); 1915 break; 1916 } 1917 1918 return NOTIFY_DONE; 1919 } 1920 1921 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev, 1922 const char *ifname) 1923 { 1924 char b[IFNAMSIZ+5]; 1925 int i = 0; 1926 1927 for (i = 0; ifname[i] != '@'; i++) { 1928 if (i == IFNAMSIZ) 1929 break; 1930 1931 b[i] = ifname[i]; 1932 } 1933 b[i] = 0; 1934 1935 return dev_get_by_name(&init_net, b); 1936 } 1937 1938 1939 /* Associate pktgen_dev with a device. */ 1940 1941 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname) 1942 { 1943 struct net_device *odev; 1944 int err; 1945 1946 /* Clean old setups */ 1947 if (pkt_dev->odev) { 1948 dev_put(pkt_dev->odev); 1949 pkt_dev->odev = NULL; 1950 } 1951 1952 odev = pktgen_dev_get_by_name(pkt_dev, ifname); 1953 if (!odev) { 1954 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname); 1955 return -ENODEV; 1956 } 1957 1958 if (odev->type != ARPHRD_ETHER) { 1959 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname); 1960 err = -EINVAL; 1961 } else if (!netif_running(odev)) { 1962 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname); 1963 err = -ENETDOWN; 1964 } else { 1965 pkt_dev->odev = odev; 1966 return 0; 1967 } 1968 1969 dev_put(odev); 1970 return err; 1971 } 1972 1973 /* Read pkt_dev from the interface and set up internal pktgen_dev 1974 * structure to have the right information to create/send packets 1975 */ 1976 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 1977 { 1978 int ntxq; 1979 1980 if (!pkt_dev->odev) { 1981 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in " 1982 "setup_inject.\n"); 1983 sprintf(pkt_dev->result, 1984 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 1985 return; 1986 } 1987 1988 /* make sure that we don't pick a non-existing transmit queue */ 1989 ntxq = pkt_dev->odev->real_num_tx_queues; 1990 1991 if (ntxq <= pkt_dev->queue_map_min) { 1992 printk(KERN_WARNING "pktgen: WARNING: Requested " 1993 "queue_map_min (zero-based) (%d) exceeds valid range " 1994 "[0 - %d] for (%d) queues on %s, resetting\n", 1995 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, 1996 pkt_dev->odev->name); 1997 pkt_dev->queue_map_min = ntxq - 1; 1998 } 1999 if (pkt_dev->queue_map_max >= ntxq) { 2000 printk(KERN_WARNING "pktgen: WARNING: Requested " 2001 "queue_map_max (zero-based) (%d) exceeds valid range " 2002 "[0 - %d] for (%d) queues on %s, resetting\n", 2003 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, 2004 pkt_dev->odev->name); 2005 pkt_dev->queue_map_max = ntxq - 1; 2006 } 2007 2008 /* Default to the interface's mac if not explicitly set. */ 2009 2010 if (is_zero_ether_addr(pkt_dev->src_mac)) 2011 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN); 2012 2013 /* Set up Dest MAC */ 2014 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 2015 2016 /* Set up pkt size */ 2017 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2018 2019 if (pkt_dev->flags & F_IPV6) { 2020 /* 2021 * Skip this automatic address setting until locks or functions 2022 * gets exported 2023 */ 2024 2025 #ifdef NOTNOW 2026 int i, set = 0, err = 1; 2027 struct inet6_dev *idev; 2028 2029 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2030 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2031 set = 1; 2032 break; 2033 } 2034 2035 if (!set) { 2036 2037 /* 2038 * Use linklevel address if unconfigured. 2039 * 2040 * use ipv6_get_lladdr if/when it's get exported 2041 */ 2042 2043 rcu_read_lock(); 2044 idev = __in6_dev_get(pkt_dev->odev); 2045 if (idev) { 2046 struct inet6_ifaddr *ifp; 2047 2048 read_lock_bh(&idev->lock); 2049 for (ifp = idev->addr_list; ifp; 2050 ifp = ifp->if_next) { 2051 if (ifp->scope == IFA_LINK 2052 && !(ifp-> 2053 flags & IFA_F_TENTATIVE)) { 2054 ipv6_addr_copy(&pkt_dev-> 2055 cur_in6_saddr, 2056 &ifp->addr); 2057 err = 0; 2058 break; 2059 } 2060 } 2061 read_unlock_bh(&idev->lock); 2062 } 2063 rcu_read_unlock(); 2064 if (err) 2065 printk(KERN_ERR "pktgen: ERROR: IPv6 link " 2066 "address not availble.\n"); 2067 } 2068 #endif 2069 } else { 2070 pkt_dev->saddr_min = 0; 2071 pkt_dev->saddr_max = 0; 2072 if (strlen(pkt_dev->src_min) == 0) { 2073 2074 struct in_device *in_dev; 2075 2076 rcu_read_lock(); 2077 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2078 if (in_dev) { 2079 if (in_dev->ifa_list) { 2080 pkt_dev->saddr_min = 2081 in_dev->ifa_list->ifa_address; 2082 pkt_dev->saddr_max = pkt_dev->saddr_min; 2083 } 2084 } 2085 rcu_read_unlock(); 2086 } else { 2087 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2088 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2089 } 2090 2091 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2092 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2093 } 2094 /* Initialize current values. */ 2095 pkt_dev->cur_dst_mac_offset = 0; 2096 pkt_dev->cur_src_mac_offset = 0; 2097 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2098 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2099 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2100 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2101 pkt_dev->nflows = 0; 2102 } 2103 2104 2105 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) 2106 { 2107 ktime_t start; 2108 s32 remaining; 2109 struct hrtimer_sleeper t; 2110 2111 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); 2112 hrtimer_set_expires(&t.timer, spin_until); 2113 2114 remaining = ktime_to_us(hrtimer_expires_remaining(&t.timer)); 2115 if (remaining <= 0) 2116 return; 2117 2118 start = ktime_now(); 2119 if (remaining < 100) 2120 udelay(remaining); /* really small just spin */ 2121 else { 2122 /* see do_nanosleep */ 2123 hrtimer_init_sleeper(&t, current); 2124 do { 2125 set_current_state(TASK_INTERRUPTIBLE); 2126 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS); 2127 if (!hrtimer_active(&t.timer)) 2128 t.task = NULL; 2129 2130 if (likely(t.task)) 2131 schedule(); 2132 2133 hrtimer_cancel(&t.timer); 2134 } while (t.task && pkt_dev->running && !signal_pending(current)); 2135 __set_current_state(TASK_RUNNING); 2136 } 2137 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), start)); 2138 } 2139 2140 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2141 { 2142 pkt_dev->pkt_overhead = 0; 2143 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2144 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2145 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2146 } 2147 2148 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) 2149 { 2150 return !!(pkt_dev->flows[flow].flags & F_INIT); 2151 } 2152 2153 static inline int f_pick(struct pktgen_dev *pkt_dev) 2154 { 2155 int flow = pkt_dev->curfl; 2156 2157 if (pkt_dev->flags & F_FLOW_SEQ) { 2158 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2159 /* reset time */ 2160 pkt_dev->flows[flow].count = 0; 2161 pkt_dev->flows[flow].flags = 0; 2162 pkt_dev->curfl += 1; 2163 if (pkt_dev->curfl >= pkt_dev->cflows) 2164 pkt_dev->curfl = 0; /*reset */ 2165 } 2166 } else { 2167 flow = random32() % pkt_dev->cflows; 2168 pkt_dev->curfl = flow; 2169 2170 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2171 pkt_dev->flows[flow].count = 0; 2172 pkt_dev->flows[flow].flags = 0; 2173 } 2174 } 2175 2176 return pkt_dev->curfl; 2177 } 2178 2179 2180 #ifdef CONFIG_XFRM 2181 /* If there was already an IPSEC SA, we keep it as is, else 2182 * we go look for it ... 2183 */ 2184 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2185 { 2186 struct xfrm_state *x = pkt_dev->flows[flow].x; 2187 if (!x) { 2188 /*slow path: we dont already have xfrm_state*/ 2189 x = xfrm_stateonly_find(&init_net, 2190 (xfrm_address_t *)&pkt_dev->cur_daddr, 2191 (xfrm_address_t *)&pkt_dev->cur_saddr, 2192 AF_INET, 2193 pkt_dev->ipsmode, 2194 pkt_dev->ipsproto, 0); 2195 if (x) { 2196 pkt_dev->flows[flow].x = x; 2197 set_pkt_overhead(pkt_dev); 2198 pkt_dev->pkt_overhead += x->props.header_len; 2199 } 2200 2201 } 2202 } 2203 #endif 2204 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2205 { 2206 2207 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2208 pkt_dev->cur_queue_map = smp_processor_id(); 2209 2210 else if (pkt_dev->queue_map_min < pkt_dev->queue_map_max) { 2211 __u16 t; 2212 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2213 t = random32() % 2214 (pkt_dev->queue_map_max - 2215 pkt_dev->queue_map_min + 1) 2216 + pkt_dev->queue_map_min; 2217 } else { 2218 t = pkt_dev->cur_queue_map + 1; 2219 if (t > pkt_dev->queue_map_max) 2220 t = pkt_dev->queue_map_min; 2221 } 2222 pkt_dev->cur_queue_map = t; 2223 } 2224 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2225 } 2226 2227 /* Increment/randomize headers according to flags and current values 2228 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2229 */ 2230 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2231 { 2232 __u32 imn; 2233 __u32 imx; 2234 int flow = 0; 2235 2236 if (pkt_dev->cflows) 2237 flow = f_pick(pkt_dev); 2238 2239 /* Deal with source MAC */ 2240 if (pkt_dev->src_mac_count > 1) { 2241 __u32 mc; 2242 __u32 tmp; 2243 2244 if (pkt_dev->flags & F_MACSRC_RND) 2245 mc = random32() % pkt_dev->src_mac_count; 2246 else { 2247 mc = pkt_dev->cur_src_mac_offset++; 2248 if (pkt_dev->cur_src_mac_offset >= 2249 pkt_dev->src_mac_count) 2250 pkt_dev->cur_src_mac_offset = 0; 2251 } 2252 2253 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2254 pkt_dev->hh[11] = tmp; 2255 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2256 pkt_dev->hh[10] = tmp; 2257 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2258 pkt_dev->hh[9] = tmp; 2259 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2260 pkt_dev->hh[8] = tmp; 2261 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2262 pkt_dev->hh[7] = tmp; 2263 } 2264 2265 /* Deal with Destination MAC */ 2266 if (pkt_dev->dst_mac_count > 1) { 2267 __u32 mc; 2268 __u32 tmp; 2269 2270 if (pkt_dev->flags & F_MACDST_RND) 2271 mc = random32() % pkt_dev->dst_mac_count; 2272 2273 else { 2274 mc = pkt_dev->cur_dst_mac_offset++; 2275 if (pkt_dev->cur_dst_mac_offset >= 2276 pkt_dev->dst_mac_count) { 2277 pkt_dev->cur_dst_mac_offset = 0; 2278 } 2279 } 2280 2281 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2282 pkt_dev->hh[5] = tmp; 2283 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2284 pkt_dev->hh[4] = tmp; 2285 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2286 pkt_dev->hh[3] = tmp; 2287 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2288 pkt_dev->hh[2] = tmp; 2289 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2290 pkt_dev->hh[1] = tmp; 2291 } 2292 2293 if (pkt_dev->flags & F_MPLS_RND) { 2294 unsigned i; 2295 for (i = 0; i < pkt_dev->nr_labels; i++) 2296 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2297 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2298 ((__force __be32)random32() & 2299 htonl(0x000fffff)); 2300 } 2301 2302 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2303 pkt_dev->vlan_id = random32() & (4096-1); 2304 } 2305 2306 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2307 pkt_dev->svlan_id = random32() & (4096 - 1); 2308 } 2309 2310 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2311 if (pkt_dev->flags & F_UDPSRC_RND) 2312 pkt_dev->cur_udp_src = random32() % 2313 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2314 + pkt_dev->udp_src_min; 2315 2316 else { 2317 pkt_dev->cur_udp_src++; 2318 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2319 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2320 } 2321 } 2322 2323 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2324 if (pkt_dev->flags & F_UDPDST_RND) { 2325 pkt_dev->cur_udp_dst = random32() % 2326 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2327 + pkt_dev->udp_dst_min; 2328 } else { 2329 pkt_dev->cur_udp_dst++; 2330 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2331 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2332 } 2333 } 2334 2335 if (!(pkt_dev->flags & F_IPV6)) { 2336 2337 imn = ntohl(pkt_dev->saddr_min); 2338 imx = ntohl(pkt_dev->saddr_max); 2339 if (imn < imx) { 2340 __u32 t; 2341 if (pkt_dev->flags & F_IPSRC_RND) 2342 t = random32() % (imx - imn) + imn; 2343 else { 2344 t = ntohl(pkt_dev->cur_saddr); 2345 t++; 2346 if (t > imx) 2347 t = imn; 2348 2349 } 2350 pkt_dev->cur_saddr = htonl(t); 2351 } 2352 2353 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2354 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2355 } else { 2356 imn = ntohl(pkt_dev->daddr_min); 2357 imx = ntohl(pkt_dev->daddr_max); 2358 if (imn < imx) { 2359 __u32 t; 2360 __be32 s; 2361 if (pkt_dev->flags & F_IPDST_RND) { 2362 2363 t = random32() % (imx - imn) + imn; 2364 s = htonl(t); 2365 2366 while (ipv4_is_loopback(s) || 2367 ipv4_is_multicast(s) || 2368 ipv4_is_lbcast(s) || 2369 ipv4_is_zeronet(s) || 2370 ipv4_is_local_multicast(s)) { 2371 t = random32() % (imx - imn) + imn; 2372 s = htonl(t); 2373 } 2374 pkt_dev->cur_daddr = s; 2375 } else { 2376 t = ntohl(pkt_dev->cur_daddr); 2377 t++; 2378 if (t > imx) { 2379 t = imn; 2380 } 2381 pkt_dev->cur_daddr = htonl(t); 2382 } 2383 } 2384 if (pkt_dev->cflows) { 2385 pkt_dev->flows[flow].flags |= F_INIT; 2386 pkt_dev->flows[flow].cur_daddr = 2387 pkt_dev->cur_daddr; 2388 #ifdef CONFIG_XFRM 2389 if (pkt_dev->flags & F_IPSEC_ON) 2390 get_ipsec_sa(pkt_dev, flow); 2391 #endif 2392 pkt_dev->nflows++; 2393 } 2394 } 2395 } else { /* IPV6 * */ 2396 2397 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 && 2398 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 && 2399 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 && 2400 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ; 2401 else { 2402 int i; 2403 2404 /* Only random destinations yet */ 2405 2406 for (i = 0; i < 4; i++) { 2407 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2408 (((__force __be32)random32() | 2409 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2410 pkt_dev->max_in6_daddr.s6_addr32[i]); 2411 } 2412 } 2413 } 2414 2415 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2416 __u32 t; 2417 if (pkt_dev->flags & F_TXSIZE_RND) { 2418 t = random32() % 2419 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2420 + pkt_dev->min_pkt_size; 2421 } else { 2422 t = pkt_dev->cur_pkt_size + 1; 2423 if (t > pkt_dev->max_pkt_size) 2424 t = pkt_dev->min_pkt_size; 2425 } 2426 pkt_dev->cur_pkt_size = t; 2427 } 2428 2429 set_cur_queue_map(pkt_dev); 2430 2431 pkt_dev->flows[flow].count++; 2432 } 2433 2434 2435 #ifdef CONFIG_XFRM 2436 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2437 { 2438 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2439 int err = 0; 2440 struct iphdr *iph; 2441 2442 if (!x) 2443 return 0; 2444 /* XXX: we dont support tunnel mode for now until 2445 * we resolve the dst issue */ 2446 if (x->props.mode != XFRM_MODE_TRANSPORT) 2447 return 0; 2448 2449 spin_lock(&x->lock); 2450 iph = ip_hdr(skb); 2451 2452 err = x->outer_mode->output(x, skb); 2453 if (err) 2454 goto error; 2455 err = x->type->output(x, skb); 2456 if (err) 2457 goto error; 2458 2459 x->curlft.bytes += skb->len; 2460 x->curlft.packets++; 2461 error: 2462 spin_unlock(&x->lock); 2463 return err; 2464 } 2465 2466 static void free_SAs(struct pktgen_dev *pkt_dev) 2467 { 2468 if (pkt_dev->cflows) { 2469 /* let go of the SAs if we have them */ 2470 int i = 0; 2471 for (; i < pkt_dev->cflows; i++) { 2472 struct xfrm_state *x = pkt_dev->flows[i].x; 2473 if (x) { 2474 xfrm_state_put(x); 2475 pkt_dev->flows[i].x = NULL; 2476 } 2477 } 2478 } 2479 } 2480 2481 static int process_ipsec(struct pktgen_dev *pkt_dev, 2482 struct sk_buff *skb, __be16 protocol) 2483 { 2484 if (pkt_dev->flags & F_IPSEC_ON) { 2485 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2486 int nhead = 0; 2487 if (x) { 2488 int ret; 2489 __u8 *eth; 2490 nhead = x->props.header_len - skb_headroom(skb); 2491 if (nhead > 0) { 2492 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2493 if (ret < 0) { 2494 printk(KERN_ERR "Error expanding " 2495 "ipsec packet %d\n", ret); 2496 goto err; 2497 } 2498 } 2499 2500 /* ipsec is not expecting ll header */ 2501 skb_pull(skb, ETH_HLEN); 2502 ret = pktgen_output_ipsec(skb, pkt_dev); 2503 if (ret) { 2504 printk(KERN_ERR "Error creating ipsec " 2505 "packet %d\n", ret); 2506 goto err; 2507 } 2508 /* restore ll */ 2509 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2510 memcpy(eth, pkt_dev->hh, 12); 2511 *(u16 *) ð[12] = protocol; 2512 } 2513 } 2514 return 1; 2515 err: 2516 kfree_skb(skb); 2517 return 0; 2518 } 2519 #endif 2520 2521 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2522 { 2523 unsigned i; 2524 for (i = 0; i < pkt_dev->nr_labels; i++) 2525 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2526 2527 mpls--; 2528 *mpls |= MPLS_STACK_BOTTOM; 2529 } 2530 2531 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2532 unsigned int prio) 2533 { 2534 return htons(id | (cfi << 12) | (prio << 13)); 2535 } 2536 2537 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2538 struct pktgen_dev *pkt_dev) 2539 { 2540 struct sk_buff *skb = NULL; 2541 __u8 *eth; 2542 struct udphdr *udph; 2543 int datalen, iplen; 2544 struct iphdr *iph; 2545 struct pktgen_hdr *pgh = NULL; 2546 __be16 protocol = htons(ETH_P_IP); 2547 __be32 *mpls; 2548 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2549 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2550 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2551 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2552 u16 queue_map; 2553 2554 if (pkt_dev->nr_labels) 2555 protocol = htons(ETH_P_MPLS_UC); 2556 2557 if (pkt_dev->vlan_id != 0xffff) 2558 protocol = htons(ETH_P_8021Q); 2559 2560 /* Update any of the values, used when we're incrementing various 2561 * fields. 2562 */ 2563 queue_map = pkt_dev->cur_queue_map; 2564 mod_cur_headers(pkt_dev); 2565 2566 datalen = (odev->hard_header_len + 16) & ~0xf; 2567 skb = __netdev_alloc_skb(odev, 2568 pkt_dev->cur_pkt_size + 64 2569 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT); 2570 if (!skb) { 2571 sprintf(pkt_dev->result, "No memory"); 2572 return NULL; 2573 } 2574 2575 skb_reserve(skb, datalen); 2576 2577 /* Reserve for ethernet and IP header */ 2578 eth = (__u8 *) skb_push(skb, 14); 2579 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2580 if (pkt_dev->nr_labels) 2581 mpls_push(mpls, pkt_dev); 2582 2583 if (pkt_dev->vlan_id != 0xffff) { 2584 if (pkt_dev->svlan_id != 0xffff) { 2585 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2586 *svlan_tci = build_tci(pkt_dev->svlan_id, 2587 pkt_dev->svlan_cfi, 2588 pkt_dev->svlan_p); 2589 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2590 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2591 } 2592 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2593 *vlan_tci = build_tci(pkt_dev->vlan_id, 2594 pkt_dev->vlan_cfi, 2595 pkt_dev->vlan_p); 2596 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2597 *vlan_encapsulated_proto = htons(ETH_P_IP); 2598 } 2599 2600 skb->network_header = skb->tail; 2601 skb->transport_header = skb->network_header + sizeof(struct iphdr); 2602 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr)); 2603 skb_set_queue_mapping(skb, queue_map); 2604 iph = ip_hdr(skb); 2605 udph = udp_hdr(skb); 2606 2607 memcpy(eth, pkt_dev->hh, 12); 2608 *(__be16 *) & eth[12] = protocol; 2609 2610 /* Eth + IPh + UDPh + mpls */ 2611 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2612 pkt_dev->pkt_overhead; 2613 if (datalen < sizeof(struct pktgen_hdr)) 2614 datalen = sizeof(struct pktgen_hdr); 2615 2616 udph->source = htons(pkt_dev->cur_udp_src); 2617 udph->dest = htons(pkt_dev->cur_udp_dst); 2618 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2619 udph->check = 0; /* No checksum */ 2620 2621 iph->ihl = 5; 2622 iph->version = 4; 2623 iph->ttl = 32; 2624 iph->tos = pkt_dev->tos; 2625 iph->protocol = IPPROTO_UDP; /* UDP */ 2626 iph->saddr = pkt_dev->cur_saddr; 2627 iph->daddr = pkt_dev->cur_daddr; 2628 iph->frag_off = 0; 2629 iplen = 20 + 8 + datalen; 2630 iph->tot_len = htons(iplen); 2631 iph->check = 0; 2632 iph->check = ip_fast_csum((void *)iph, iph->ihl); 2633 skb->protocol = protocol; 2634 skb->mac_header = (skb->network_header - ETH_HLEN - 2635 pkt_dev->pkt_overhead); 2636 skb->dev = odev; 2637 skb->pkt_type = PACKET_HOST; 2638 2639 if (pkt_dev->nfrags <= 0) 2640 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 2641 else { 2642 int frags = pkt_dev->nfrags; 2643 int i; 2644 2645 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 2646 2647 if (frags > MAX_SKB_FRAGS) 2648 frags = MAX_SKB_FRAGS; 2649 if (datalen > frags * PAGE_SIZE) { 2650 skb_put(skb, datalen - frags * PAGE_SIZE); 2651 datalen = frags * PAGE_SIZE; 2652 } 2653 2654 i = 0; 2655 while (datalen > 0) { 2656 struct page *page = alloc_pages(GFP_KERNEL, 0); 2657 skb_shinfo(skb)->frags[i].page = page; 2658 skb_shinfo(skb)->frags[i].page_offset = 0; 2659 skb_shinfo(skb)->frags[i].size = 2660 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 2661 datalen -= skb_shinfo(skb)->frags[i].size; 2662 skb->len += skb_shinfo(skb)->frags[i].size; 2663 skb->data_len += skb_shinfo(skb)->frags[i].size; 2664 i++; 2665 skb_shinfo(skb)->nr_frags = i; 2666 } 2667 2668 while (i < frags) { 2669 int rem; 2670 2671 if (i == 0) 2672 break; 2673 2674 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 2675 if (rem == 0) 2676 break; 2677 2678 skb_shinfo(skb)->frags[i - 1].size -= rem; 2679 2680 skb_shinfo(skb)->frags[i] = 2681 skb_shinfo(skb)->frags[i - 1]; 2682 get_page(skb_shinfo(skb)->frags[i].page); 2683 skb_shinfo(skb)->frags[i].page = 2684 skb_shinfo(skb)->frags[i - 1].page; 2685 skb_shinfo(skb)->frags[i].page_offset += 2686 skb_shinfo(skb)->frags[i - 1].size; 2687 skb_shinfo(skb)->frags[i].size = rem; 2688 i++; 2689 skb_shinfo(skb)->nr_frags = i; 2690 } 2691 } 2692 2693 /* Stamp the time, and sequence number, 2694 * convert them to network byte order 2695 */ 2696 if (pgh) { 2697 struct timeval timestamp; 2698 2699 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2700 pgh->seq_num = htonl(pkt_dev->seq_num); 2701 2702 do_gettimeofday(×tamp); 2703 pgh->tv_sec = htonl(timestamp.tv_sec); 2704 pgh->tv_usec = htonl(timestamp.tv_usec); 2705 } 2706 2707 #ifdef CONFIG_XFRM 2708 if (!process_ipsec(pkt_dev, skb, protocol)) 2709 return NULL; 2710 #endif 2711 2712 return skb; 2713 } 2714 2715 /* 2716 * scan_ip6, fmt_ip taken from dietlibc-0.21 2717 * Author Felix von Leitner <felix-dietlibc@fefe.de> 2718 * 2719 * Slightly modified for kernel. 2720 * Should be candidate for net/ipv4/utils.c 2721 * --ro 2722 */ 2723 2724 static unsigned int scan_ip6(const char *s, char ip[16]) 2725 { 2726 unsigned int i; 2727 unsigned int len = 0; 2728 unsigned long u; 2729 char suffix[16]; 2730 unsigned int prefixlen = 0; 2731 unsigned int suffixlen = 0; 2732 __be32 tmp; 2733 char *pos; 2734 2735 for (i = 0; i < 16; i++) 2736 ip[i] = 0; 2737 2738 for (;;) { 2739 if (*s == ':') { 2740 len++; 2741 if (s[1] == ':') { /* Found "::", skip to part 2 */ 2742 s += 2; 2743 len++; 2744 break; 2745 } 2746 s++; 2747 } 2748 2749 u = simple_strtoul(s, &pos, 16); 2750 i = pos - s; 2751 if (!i) 2752 return 0; 2753 if (prefixlen == 12 && s[i] == '.') { 2754 2755 /* the last 4 bytes may be written as IPv4 address */ 2756 2757 tmp = in_aton(s); 2758 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp)); 2759 return i + len; 2760 } 2761 ip[prefixlen++] = (u >> 8); 2762 ip[prefixlen++] = (u & 255); 2763 s += i; 2764 len += i; 2765 if (prefixlen == 16) 2766 return len; 2767 } 2768 2769 /* part 2, after "::" */ 2770 for (;;) { 2771 if (*s == ':') { 2772 if (suffixlen == 0) 2773 break; 2774 s++; 2775 len++; 2776 } else if (suffixlen != 0) 2777 break; 2778 2779 u = simple_strtol(s, &pos, 16); 2780 i = pos - s; 2781 if (!i) { 2782 if (*s) 2783 len--; 2784 break; 2785 } 2786 if (suffixlen + prefixlen <= 12 && s[i] == '.') { 2787 tmp = in_aton(s); 2788 memcpy((struct in_addr *)(suffix + suffixlen), &tmp, 2789 sizeof(tmp)); 2790 suffixlen += 4; 2791 len += strlen(s); 2792 break; 2793 } 2794 suffix[suffixlen++] = (u >> 8); 2795 suffix[suffixlen++] = (u & 255); 2796 s += i; 2797 len += i; 2798 if (prefixlen + suffixlen == 16) 2799 break; 2800 } 2801 for (i = 0; i < suffixlen; i++) 2802 ip[16 - suffixlen + i] = suffix[i]; 2803 return len; 2804 } 2805 2806 static char tohex(char hexdigit) 2807 { 2808 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0'; 2809 } 2810 2811 static int fmt_xlong(char *s, unsigned int i) 2812 { 2813 char *bak = s; 2814 *s = tohex((i >> 12) & 0xf); 2815 if (s != bak || *s != '0') 2816 ++s; 2817 *s = tohex((i >> 8) & 0xf); 2818 if (s != bak || *s != '0') 2819 ++s; 2820 *s = tohex((i >> 4) & 0xf); 2821 if (s != bak || *s != '0') 2822 ++s; 2823 *s = tohex(i & 0xf); 2824 return s - bak + 1; 2825 } 2826 2827 static unsigned int fmt_ip6(char *s, const char ip[16]) 2828 { 2829 unsigned int len; 2830 unsigned int i; 2831 unsigned int temp; 2832 unsigned int compressing; 2833 int j; 2834 2835 len = 0; 2836 compressing = 0; 2837 for (j = 0; j < 16; j += 2) { 2838 2839 #ifdef V4MAPPEDPREFIX 2840 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) { 2841 inet_ntoa_r(*(struct in_addr *)(ip + 12), s); 2842 temp = strlen(s); 2843 return len + temp; 2844 } 2845 #endif 2846 temp = ((unsigned long)(unsigned char)ip[j] << 8) + 2847 (unsigned long)(unsigned char)ip[j + 1]; 2848 if (temp == 0) { 2849 if (!compressing) { 2850 compressing = 1; 2851 if (j == 0) { 2852 *s++ = ':'; 2853 ++len; 2854 } 2855 } 2856 } else { 2857 if (compressing) { 2858 compressing = 0; 2859 *s++ = ':'; 2860 ++len; 2861 } 2862 i = fmt_xlong(s, temp); 2863 len += i; 2864 s += i; 2865 if (j < 14) { 2866 *s++ = ':'; 2867 ++len; 2868 } 2869 } 2870 } 2871 if (compressing) { 2872 *s++ = ':'; 2873 ++len; 2874 } 2875 *s = 0; 2876 return len; 2877 } 2878 2879 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2880 struct pktgen_dev *pkt_dev) 2881 { 2882 struct sk_buff *skb = NULL; 2883 __u8 *eth; 2884 struct udphdr *udph; 2885 int datalen; 2886 struct ipv6hdr *iph; 2887 struct pktgen_hdr *pgh = NULL; 2888 __be16 protocol = htons(ETH_P_IPV6); 2889 __be32 *mpls; 2890 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2891 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2892 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2893 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2894 u16 queue_map; 2895 2896 if (pkt_dev->nr_labels) 2897 protocol = htons(ETH_P_MPLS_UC); 2898 2899 if (pkt_dev->vlan_id != 0xffff) 2900 protocol = htons(ETH_P_8021Q); 2901 2902 /* Update any of the values, used when we're incrementing various 2903 * fields. 2904 */ 2905 queue_map = pkt_dev->cur_queue_map; 2906 mod_cur_headers(pkt_dev); 2907 2908 skb = __netdev_alloc_skb(odev, 2909 pkt_dev->cur_pkt_size + 64 2910 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT); 2911 if (!skb) { 2912 sprintf(pkt_dev->result, "No memory"); 2913 return NULL; 2914 } 2915 2916 skb_reserve(skb, 16); 2917 2918 /* Reserve for ethernet and IP header */ 2919 eth = (__u8 *) skb_push(skb, 14); 2920 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2921 if (pkt_dev->nr_labels) 2922 mpls_push(mpls, pkt_dev); 2923 2924 if (pkt_dev->vlan_id != 0xffff) { 2925 if (pkt_dev->svlan_id != 0xffff) { 2926 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2927 *svlan_tci = build_tci(pkt_dev->svlan_id, 2928 pkt_dev->svlan_cfi, 2929 pkt_dev->svlan_p); 2930 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2931 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2932 } 2933 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2934 *vlan_tci = build_tci(pkt_dev->vlan_id, 2935 pkt_dev->vlan_cfi, 2936 pkt_dev->vlan_p); 2937 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2938 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 2939 } 2940 2941 skb->network_header = skb->tail; 2942 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr); 2943 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr)); 2944 skb_set_queue_mapping(skb, queue_map); 2945 iph = ipv6_hdr(skb); 2946 udph = udp_hdr(skb); 2947 2948 memcpy(eth, pkt_dev->hh, 12); 2949 *(__be16 *) ð[12] = protocol; 2950 2951 /* Eth + IPh + UDPh + mpls */ 2952 datalen = pkt_dev->cur_pkt_size - 14 - 2953 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 2954 pkt_dev->pkt_overhead; 2955 2956 if (datalen < sizeof(struct pktgen_hdr)) { 2957 datalen = sizeof(struct pktgen_hdr); 2958 if (net_ratelimit()) 2959 printk(KERN_INFO "pktgen: increased datalen to %d\n", 2960 datalen); 2961 } 2962 2963 udph->source = htons(pkt_dev->cur_udp_src); 2964 udph->dest = htons(pkt_dev->cur_udp_dst); 2965 udph->len = htons(datalen + sizeof(struct udphdr)); 2966 udph->check = 0; /* No checksum */ 2967 2968 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 2969 2970 if (pkt_dev->traffic_class) { 2971 /* Version + traffic class + flow (0) */ 2972 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 2973 } 2974 2975 iph->hop_limit = 32; 2976 2977 iph->payload_len = htons(sizeof(struct udphdr) + datalen); 2978 iph->nexthdr = IPPROTO_UDP; 2979 2980 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr); 2981 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr); 2982 2983 skb->mac_header = (skb->network_header - ETH_HLEN - 2984 pkt_dev->pkt_overhead); 2985 skb->protocol = protocol; 2986 skb->dev = odev; 2987 skb->pkt_type = PACKET_HOST; 2988 2989 if (pkt_dev->nfrags <= 0) 2990 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 2991 else { 2992 int frags = pkt_dev->nfrags; 2993 int i; 2994 2995 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 2996 2997 if (frags > MAX_SKB_FRAGS) 2998 frags = MAX_SKB_FRAGS; 2999 if (datalen > frags * PAGE_SIZE) { 3000 skb_put(skb, datalen - frags * PAGE_SIZE); 3001 datalen = frags * PAGE_SIZE; 3002 } 3003 3004 i = 0; 3005 while (datalen > 0) { 3006 struct page *page = alloc_pages(GFP_KERNEL, 0); 3007 skb_shinfo(skb)->frags[i].page = page; 3008 skb_shinfo(skb)->frags[i].page_offset = 0; 3009 skb_shinfo(skb)->frags[i].size = 3010 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 3011 datalen -= skb_shinfo(skb)->frags[i].size; 3012 skb->len += skb_shinfo(skb)->frags[i].size; 3013 skb->data_len += skb_shinfo(skb)->frags[i].size; 3014 i++; 3015 skb_shinfo(skb)->nr_frags = i; 3016 } 3017 3018 while (i < frags) { 3019 int rem; 3020 3021 if (i == 0) 3022 break; 3023 3024 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 3025 if (rem == 0) 3026 break; 3027 3028 skb_shinfo(skb)->frags[i - 1].size -= rem; 3029 3030 skb_shinfo(skb)->frags[i] = 3031 skb_shinfo(skb)->frags[i - 1]; 3032 get_page(skb_shinfo(skb)->frags[i].page); 3033 skb_shinfo(skb)->frags[i].page = 3034 skb_shinfo(skb)->frags[i - 1].page; 3035 skb_shinfo(skb)->frags[i].page_offset += 3036 skb_shinfo(skb)->frags[i - 1].size; 3037 skb_shinfo(skb)->frags[i].size = rem; 3038 i++; 3039 skb_shinfo(skb)->nr_frags = i; 3040 } 3041 } 3042 3043 /* Stamp the time, and sequence number, 3044 * convert them to network byte order 3045 * should we update cloned packets too ? 3046 */ 3047 if (pgh) { 3048 struct timeval timestamp; 3049 3050 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 3051 pgh->seq_num = htonl(pkt_dev->seq_num); 3052 3053 do_gettimeofday(×tamp); 3054 pgh->tv_sec = htonl(timestamp.tv_sec); 3055 pgh->tv_usec = htonl(timestamp.tv_usec); 3056 } 3057 /* pkt_dev->seq_num++; FF: you really mean this? */ 3058 3059 return skb; 3060 } 3061 3062 static struct sk_buff *fill_packet(struct net_device *odev, 3063 struct pktgen_dev *pkt_dev) 3064 { 3065 if (pkt_dev->flags & F_IPV6) 3066 return fill_packet_ipv6(odev, pkt_dev); 3067 else 3068 return fill_packet_ipv4(odev, pkt_dev); 3069 } 3070 3071 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 3072 { 3073 pkt_dev->seq_num = 1; 3074 pkt_dev->idle_acc = 0; 3075 pkt_dev->sofar = 0; 3076 pkt_dev->tx_bytes = 0; 3077 pkt_dev->errors = 0; 3078 } 3079 3080 /* Set up structure for sending pkts, clear counters */ 3081 3082 static void pktgen_run(struct pktgen_thread *t) 3083 { 3084 struct pktgen_dev *pkt_dev; 3085 int started = 0; 3086 3087 pr_debug("pktgen: entering pktgen_run. %p\n", t); 3088 3089 if_lock(t); 3090 list_for_each_entry(pkt_dev, &t->if_list, list) { 3091 3092 /* 3093 * setup odev and create initial packet. 3094 */ 3095 pktgen_setup_inject(pkt_dev); 3096 3097 if (pkt_dev->odev) { 3098 pktgen_clear_counters(pkt_dev); 3099 pkt_dev->running = 1; /* Cranke yeself! */ 3100 pkt_dev->skb = NULL; 3101 pkt_dev->started_at = 3102 pkt_dev->next_tx = ktime_now(); 3103 3104 set_pkt_overhead(pkt_dev); 3105 3106 strcpy(pkt_dev->result, "Starting"); 3107 started++; 3108 } else 3109 strcpy(pkt_dev->result, "Error starting"); 3110 } 3111 if_unlock(t); 3112 if (started) 3113 t->control &= ~(T_STOP); 3114 } 3115 3116 static void pktgen_stop_all_threads_ifs(void) 3117 { 3118 struct pktgen_thread *t; 3119 3120 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n"); 3121 3122 mutex_lock(&pktgen_thread_lock); 3123 3124 list_for_each_entry(t, &pktgen_threads, th_list) 3125 t->control |= T_STOP; 3126 3127 mutex_unlock(&pktgen_thread_lock); 3128 } 3129 3130 static int thread_is_running(const struct pktgen_thread *t) 3131 { 3132 const struct pktgen_dev *pkt_dev; 3133 3134 list_for_each_entry(pkt_dev, &t->if_list, list) 3135 if (pkt_dev->running) 3136 return 1; 3137 return 0; 3138 } 3139 3140 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3141 { 3142 if_lock(t); 3143 3144 while (thread_is_running(t)) { 3145 3146 if_unlock(t); 3147 3148 msleep_interruptible(100); 3149 3150 if (signal_pending(current)) 3151 goto signal; 3152 if_lock(t); 3153 } 3154 if_unlock(t); 3155 return 1; 3156 signal: 3157 return 0; 3158 } 3159 3160 static int pktgen_wait_all_threads_run(void) 3161 { 3162 struct pktgen_thread *t; 3163 int sig = 1; 3164 3165 mutex_lock(&pktgen_thread_lock); 3166 3167 list_for_each_entry(t, &pktgen_threads, th_list) { 3168 sig = pktgen_wait_thread_run(t); 3169 if (sig == 0) 3170 break; 3171 } 3172 3173 if (sig == 0) 3174 list_for_each_entry(t, &pktgen_threads, th_list) 3175 t->control |= (T_STOP); 3176 3177 mutex_unlock(&pktgen_thread_lock); 3178 return sig; 3179 } 3180 3181 static void pktgen_run_all_threads(void) 3182 { 3183 struct pktgen_thread *t; 3184 3185 pr_debug("pktgen: entering pktgen_run_all_threads.\n"); 3186 3187 mutex_lock(&pktgen_thread_lock); 3188 3189 list_for_each_entry(t, &pktgen_threads, th_list) 3190 t->control |= (T_RUN); 3191 3192 mutex_unlock(&pktgen_thread_lock); 3193 3194 /* Propagate thread->control */ 3195 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3196 3197 pktgen_wait_all_threads_run(); 3198 } 3199 3200 static void pktgen_reset_all_threads(void) 3201 { 3202 struct pktgen_thread *t; 3203 3204 pr_debug("pktgen: entering pktgen_reset_all_threads.\n"); 3205 3206 mutex_lock(&pktgen_thread_lock); 3207 3208 list_for_each_entry(t, &pktgen_threads, th_list) 3209 t->control |= (T_REMDEVALL); 3210 3211 mutex_unlock(&pktgen_thread_lock); 3212 3213 /* Propagate thread->control */ 3214 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3215 3216 pktgen_wait_all_threads_run(); 3217 } 3218 3219 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3220 { 3221 __u64 bps, mbps, pps; 3222 char *p = pkt_dev->result; 3223 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3224 pkt_dev->started_at); 3225 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3226 3227 p += sprintf(p, "OK: %llu(c%llu+d%llu) nsec, %llu (%dbyte,%dfrags)\n", 3228 (unsigned long long)ktime_to_us(elapsed), 3229 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3230 (unsigned long long)ktime_to_us(idle), 3231 (unsigned long long)pkt_dev->sofar, 3232 pkt_dev->cur_pkt_size, nr_frags); 3233 3234 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3235 ktime_to_ns(elapsed)); 3236 3237 bps = pps * 8 * pkt_dev->cur_pkt_size; 3238 3239 mbps = bps; 3240 do_div(mbps, 1000000); 3241 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3242 (unsigned long long)pps, 3243 (unsigned long long)mbps, 3244 (unsigned long long)bps, 3245 (unsigned long long)pkt_dev->errors); 3246 } 3247 3248 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3249 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3250 { 3251 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3252 3253 if (!pkt_dev->running) { 3254 printk(KERN_WARNING "pktgen: interface: %s is already " 3255 "stopped\n", pkt_dev->odev->name); 3256 return -EINVAL; 3257 } 3258 3259 kfree_skb(pkt_dev->skb); 3260 pkt_dev->skb = NULL; 3261 pkt_dev->stopped_at = ktime_now(); 3262 pkt_dev->running = 0; 3263 3264 show_results(pkt_dev, nr_frags); 3265 3266 return 0; 3267 } 3268 3269 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3270 { 3271 struct pktgen_dev *pkt_dev, *best = NULL; 3272 3273 if_lock(t); 3274 3275 list_for_each_entry(pkt_dev, &t->if_list, list) { 3276 if (!pkt_dev->running) 3277 continue; 3278 if (best == NULL) 3279 best = pkt_dev; 3280 else if (ktime_lt(pkt_dev->next_tx, best->next_tx)) 3281 best = pkt_dev; 3282 } 3283 if_unlock(t); 3284 return best; 3285 } 3286 3287 static void pktgen_stop(struct pktgen_thread *t) 3288 { 3289 struct pktgen_dev *pkt_dev; 3290 3291 pr_debug("pktgen: entering pktgen_stop\n"); 3292 3293 if_lock(t); 3294 3295 list_for_each_entry(pkt_dev, &t->if_list, list) { 3296 pktgen_stop_device(pkt_dev); 3297 } 3298 3299 if_unlock(t); 3300 } 3301 3302 /* 3303 * one of our devices needs to be removed - find it 3304 * and remove it 3305 */ 3306 static void pktgen_rem_one_if(struct pktgen_thread *t) 3307 { 3308 struct list_head *q, *n; 3309 struct pktgen_dev *cur; 3310 3311 pr_debug("pktgen: entering pktgen_rem_one_if\n"); 3312 3313 if_lock(t); 3314 3315 list_for_each_safe(q, n, &t->if_list) { 3316 cur = list_entry(q, struct pktgen_dev, list); 3317 3318 if (!cur->removal_mark) 3319 continue; 3320 3321 kfree_skb(cur->skb); 3322 cur->skb = NULL; 3323 3324 pktgen_remove_device(t, cur); 3325 3326 break; 3327 } 3328 3329 if_unlock(t); 3330 } 3331 3332 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3333 { 3334 struct list_head *q, *n; 3335 struct pktgen_dev *cur; 3336 3337 /* Remove all devices, free mem */ 3338 3339 pr_debug("pktgen: entering pktgen_rem_all_ifs\n"); 3340 if_lock(t); 3341 3342 list_for_each_safe(q, n, &t->if_list) { 3343 cur = list_entry(q, struct pktgen_dev, list); 3344 3345 kfree_skb(cur->skb); 3346 cur->skb = NULL; 3347 3348 pktgen_remove_device(t, cur); 3349 } 3350 3351 if_unlock(t); 3352 } 3353 3354 static void pktgen_rem_thread(struct pktgen_thread *t) 3355 { 3356 /* Remove from the thread list */ 3357 3358 remove_proc_entry(t->tsk->comm, pg_proc_dir); 3359 3360 mutex_lock(&pktgen_thread_lock); 3361 3362 list_del(&t->th_list); 3363 3364 mutex_unlock(&pktgen_thread_lock); 3365 } 3366 3367 static void idle(struct pktgen_dev *pkt_dev) 3368 { 3369 ktime_t idle_start = ktime_now(); 3370 3371 if (need_resched()) 3372 schedule(); 3373 else 3374 cpu_relax(); 3375 3376 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3377 } 3378 3379 3380 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3381 { 3382 struct net_device *odev = pkt_dev->odev; 3383 int (*xmit)(struct sk_buff *, struct net_device *) 3384 = odev->netdev_ops->ndo_start_xmit; 3385 struct netdev_queue *txq; 3386 u16 queue_map; 3387 int ret; 3388 3389 if (pkt_dev->delay) { 3390 spin(pkt_dev, pkt_dev->next_tx); 3391 3392 /* This is max DELAY, this has special meaning of 3393 * "never transmit" 3394 */ 3395 if (pkt_dev->delay == ULLONG_MAX) { 3396 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX); 3397 return; 3398 } 3399 } 3400 3401 if (!pkt_dev->skb) { 3402 set_cur_queue_map(pkt_dev); 3403 queue_map = pkt_dev->cur_queue_map; 3404 } else { 3405 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3406 } 3407 3408 txq = netdev_get_tx_queue(odev, queue_map); 3409 /* Did we saturate the queue already? */ 3410 if (netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq)) { 3411 /* If device is down, then all queues are permnantly frozen */ 3412 if (netif_running(odev)) 3413 idle(pkt_dev); 3414 else 3415 pktgen_stop_device(pkt_dev); 3416 return; 3417 } 3418 3419 if (!pkt_dev->skb || (pkt_dev->last_ok && 3420 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { 3421 /* build a new pkt */ 3422 kfree_skb(pkt_dev->skb); 3423 3424 pkt_dev->skb = fill_packet(odev, pkt_dev); 3425 if (pkt_dev->skb == NULL) { 3426 printk(KERN_ERR "pktgen: ERROR: couldn't " 3427 "allocate skb in fill_packet.\n"); 3428 schedule(); 3429 pkt_dev->clone_count--; /* back out increment, OOM */ 3430 return; 3431 } 3432 3433 pkt_dev->allocated_skbs++; 3434 pkt_dev->clone_count = 0; /* reset counter */ 3435 } 3436 3437 /* fill_packet() might have changed the queue */ 3438 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3439 txq = netdev_get_tx_queue(odev, queue_map); 3440 3441 __netif_tx_lock_bh(txq); 3442 if (unlikely(netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq))) 3443 pkt_dev->last_ok = 0; 3444 else { 3445 atomic_inc(&(pkt_dev->skb->users)); 3446 3447 retry_now: 3448 ret = (*xmit)(pkt_dev->skb, odev); 3449 switch (ret) { 3450 case NETDEV_TX_OK: 3451 txq_trans_update(txq); 3452 pkt_dev->last_ok = 1; 3453 pkt_dev->sofar++; 3454 pkt_dev->seq_num++; 3455 pkt_dev->tx_bytes += pkt_dev->cur_pkt_size; 3456 break; 3457 case NETDEV_TX_LOCKED: 3458 cpu_relax(); 3459 goto retry_now; 3460 default: /* Drivers are not supposed to return other values! */ 3461 if (net_ratelimit()) 3462 pr_info("pktgen: %s xmit error: %d\n", 3463 odev->name, ret); 3464 pkt_dev->errors++; 3465 /* fallthru */ 3466 case NETDEV_TX_BUSY: 3467 /* Retry it next time */ 3468 atomic_dec(&(pkt_dev->skb->users)); 3469 pkt_dev->last_ok = 0; 3470 } 3471 3472 if (pkt_dev->delay) 3473 pkt_dev->next_tx = ktime_add_ns(ktime_now(), 3474 pkt_dev->delay); 3475 } 3476 __netif_tx_unlock_bh(txq); 3477 3478 /* If pkt_dev->count is zero, then run forever */ 3479 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3480 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3481 if (signal_pending(current)) 3482 break; 3483 idle(pkt_dev); 3484 } 3485 3486 /* Done with this */ 3487 pktgen_stop_device(pkt_dev); 3488 } 3489 } 3490 3491 /* 3492 * Main loop of the thread goes here 3493 */ 3494 3495 static int pktgen_thread_worker(void *arg) 3496 { 3497 DEFINE_WAIT(wait); 3498 struct pktgen_thread *t = arg; 3499 struct pktgen_dev *pkt_dev = NULL; 3500 int cpu = t->cpu; 3501 3502 BUG_ON(smp_processor_id() != cpu); 3503 3504 init_waitqueue_head(&t->queue); 3505 complete(&t->start_done); 3506 3507 pr_debug("pktgen: starting pktgen/%d: pid=%d\n", 3508 cpu, task_pid_nr(current)); 3509 3510 set_current_state(TASK_INTERRUPTIBLE); 3511 3512 set_freezable(); 3513 3514 while (!kthread_should_stop()) { 3515 pkt_dev = next_to_run(t); 3516 3517 if (!pkt_dev && 3518 (t->control & (T_STOP | T_RUN | T_REMDEVALL | T_REMDEV)) 3519 == 0) { 3520 prepare_to_wait(&(t->queue), &wait, 3521 TASK_INTERRUPTIBLE); 3522 schedule_timeout(HZ / 10); 3523 finish_wait(&(t->queue), &wait); 3524 } 3525 3526 __set_current_state(TASK_RUNNING); 3527 3528 if (pkt_dev) 3529 pktgen_xmit(pkt_dev); 3530 3531 if (t->control & T_STOP) { 3532 pktgen_stop(t); 3533 t->control &= ~(T_STOP); 3534 } 3535 3536 if (t->control & T_RUN) { 3537 pktgen_run(t); 3538 t->control &= ~(T_RUN); 3539 } 3540 3541 if (t->control & T_REMDEVALL) { 3542 pktgen_rem_all_ifs(t); 3543 t->control &= ~(T_REMDEVALL); 3544 } 3545 3546 if (t->control & T_REMDEV) { 3547 pktgen_rem_one_if(t); 3548 t->control &= ~(T_REMDEV); 3549 } 3550 3551 try_to_freeze(); 3552 3553 set_current_state(TASK_INTERRUPTIBLE); 3554 } 3555 3556 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm); 3557 pktgen_stop(t); 3558 3559 pr_debug("pktgen: %s removing all device\n", t->tsk->comm); 3560 pktgen_rem_all_ifs(t); 3561 3562 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm); 3563 pktgen_rem_thread(t); 3564 3565 return 0; 3566 } 3567 3568 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3569 const char *ifname) 3570 { 3571 struct pktgen_dev *p, *pkt_dev = NULL; 3572 if_lock(t); 3573 3574 list_for_each_entry(p, &t->if_list, list) 3575 if (strncmp(p->odev->name, ifname, IFNAMSIZ) == 0) { 3576 pkt_dev = p; 3577 break; 3578 } 3579 3580 if_unlock(t); 3581 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev); 3582 return pkt_dev; 3583 } 3584 3585 /* 3586 * Adds a dev at front of if_list. 3587 */ 3588 3589 static int add_dev_to_thread(struct pktgen_thread *t, 3590 struct pktgen_dev *pkt_dev) 3591 { 3592 int rv = 0; 3593 3594 if_lock(t); 3595 3596 if (pkt_dev->pg_thread) { 3597 printk(KERN_ERR "pktgen: ERROR: already assigned " 3598 "to a thread.\n"); 3599 rv = -EBUSY; 3600 goto out; 3601 } 3602 3603 list_add(&pkt_dev->list, &t->if_list); 3604 pkt_dev->pg_thread = t; 3605 pkt_dev->running = 0; 3606 3607 out: 3608 if_unlock(t); 3609 return rv; 3610 } 3611 3612 /* Called under thread lock */ 3613 3614 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3615 { 3616 struct pktgen_dev *pkt_dev; 3617 int err; 3618 3619 /* We don't allow a device to be on several threads */ 3620 3621 pkt_dev = __pktgen_NN_threads(ifname, FIND); 3622 if (pkt_dev) { 3623 printk(KERN_ERR "pktgen: ERROR: interface already used.\n"); 3624 return -EBUSY; 3625 } 3626 3627 pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL); 3628 if (!pkt_dev) 3629 return -ENOMEM; 3630 3631 pkt_dev->flows = vmalloc(MAX_CFLOWS * sizeof(struct flow_state)); 3632 if (pkt_dev->flows == NULL) { 3633 kfree(pkt_dev); 3634 return -ENOMEM; 3635 } 3636 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state)); 3637 3638 pkt_dev->removal_mark = 0; 3639 pkt_dev->min_pkt_size = ETH_ZLEN; 3640 pkt_dev->max_pkt_size = ETH_ZLEN; 3641 pkt_dev->nfrags = 0; 3642 pkt_dev->clone_skb = pg_clone_skb_d; 3643 pkt_dev->delay = pg_delay_d; 3644 pkt_dev->count = pg_count_d; 3645 pkt_dev->sofar = 0; 3646 pkt_dev->udp_src_min = 9; /* sink port */ 3647 pkt_dev->udp_src_max = 9; 3648 pkt_dev->udp_dst_min = 9; 3649 pkt_dev->udp_dst_max = 9; 3650 3651 pkt_dev->vlan_p = 0; 3652 pkt_dev->vlan_cfi = 0; 3653 pkt_dev->vlan_id = 0xffff; 3654 pkt_dev->svlan_p = 0; 3655 pkt_dev->svlan_cfi = 0; 3656 pkt_dev->svlan_id = 0xffff; 3657 3658 err = pktgen_setup_dev(pkt_dev, ifname); 3659 if (err) 3660 goto out1; 3661 3662 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir, 3663 &pktgen_if_fops, pkt_dev); 3664 if (!pkt_dev->entry) { 3665 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n", 3666 PG_PROC_DIR, ifname); 3667 err = -EINVAL; 3668 goto out2; 3669 } 3670 #ifdef CONFIG_XFRM 3671 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3672 pkt_dev->ipsproto = IPPROTO_ESP; 3673 #endif 3674 3675 return add_dev_to_thread(t, pkt_dev); 3676 out2: 3677 dev_put(pkt_dev->odev); 3678 out1: 3679 #ifdef CONFIG_XFRM 3680 free_SAs(pkt_dev); 3681 #endif 3682 vfree(pkt_dev->flows); 3683 kfree(pkt_dev); 3684 return err; 3685 } 3686 3687 static int __init pktgen_create_thread(int cpu) 3688 { 3689 struct pktgen_thread *t; 3690 struct proc_dir_entry *pe; 3691 struct task_struct *p; 3692 3693 t = kzalloc(sizeof(struct pktgen_thread), GFP_KERNEL); 3694 if (!t) { 3695 printk(KERN_ERR "pktgen: ERROR: out of memory, can't " 3696 "create new thread.\n"); 3697 return -ENOMEM; 3698 } 3699 3700 spin_lock_init(&t->if_lock); 3701 t->cpu = cpu; 3702 3703 INIT_LIST_HEAD(&t->if_list); 3704 3705 list_add_tail(&t->th_list, &pktgen_threads); 3706 init_completion(&t->start_done); 3707 3708 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu); 3709 if (IS_ERR(p)) { 3710 printk(KERN_ERR "pktgen: kernel_thread() failed " 3711 "for cpu %d\n", t->cpu); 3712 list_del(&t->th_list); 3713 kfree(t); 3714 return PTR_ERR(p); 3715 } 3716 kthread_bind(p, cpu); 3717 t->tsk = p; 3718 3719 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir, 3720 &pktgen_thread_fops, t); 3721 if (!pe) { 3722 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n", 3723 PG_PROC_DIR, t->tsk->comm); 3724 kthread_stop(p); 3725 list_del(&t->th_list); 3726 kfree(t); 3727 return -EINVAL; 3728 } 3729 3730 wake_up_process(p); 3731 wait_for_completion(&t->start_done); 3732 3733 return 0; 3734 } 3735 3736 /* 3737 * Removes a device from the thread if_list. 3738 */ 3739 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3740 struct pktgen_dev *pkt_dev) 3741 { 3742 struct list_head *q, *n; 3743 struct pktgen_dev *p; 3744 3745 list_for_each_safe(q, n, &t->if_list) { 3746 p = list_entry(q, struct pktgen_dev, list); 3747 if (p == pkt_dev) 3748 list_del(&p->list); 3749 } 3750 } 3751 3752 static int pktgen_remove_device(struct pktgen_thread *t, 3753 struct pktgen_dev *pkt_dev) 3754 { 3755 3756 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev); 3757 3758 if (pkt_dev->running) { 3759 printk(KERN_WARNING "pktgen: WARNING: trying to remove a " 3760 "running interface, stopping it now.\n"); 3761 pktgen_stop_device(pkt_dev); 3762 } 3763 3764 /* Dis-associate from the interface */ 3765 3766 if (pkt_dev->odev) { 3767 dev_put(pkt_dev->odev); 3768 pkt_dev->odev = NULL; 3769 } 3770 3771 /* And update the thread if_list */ 3772 3773 _rem_dev_from_if_list(t, pkt_dev); 3774 3775 if (pkt_dev->entry) 3776 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 3777 3778 #ifdef CONFIG_XFRM 3779 free_SAs(pkt_dev); 3780 #endif 3781 vfree(pkt_dev->flows); 3782 kfree(pkt_dev); 3783 return 0; 3784 } 3785 3786 static int __init pg_init(void) 3787 { 3788 int cpu; 3789 struct proc_dir_entry *pe; 3790 3791 printk(KERN_INFO "%s", version); 3792 3793 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net); 3794 if (!pg_proc_dir) 3795 return -ENODEV; 3796 3797 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops); 3798 if (pe == NULL) { 3799 printk(KERN_ERR "pktgen: ERROR: cannot create %s " 3800 "procfs entry.\n", PGCTRL); 3801 proc_net_remove(&init_net, PG_PROC_DIR); 3802 return -EINVAL; 3803 } 3804 3805 /* Register us to receive netdevice events */ 3806 register_netdevice_notifier(&pktgen_notifier_block); 3807 3808 for_each_online_cpu(cpu) { 3809 int err; 3810 3811 err = pktgen_create_thread(cpu); 3812 if (err) 3813 printk(KERN_WARNING "pktgen: WARNING: Cannot create " 3814 "thread for cpu %d (%d)\n", cpu, err); 3815 } 3816 3817 if (list_empty(&pktgen_threads)) { 3818 printk(KERN_ERR "pktgen: ERROR: Initialization failed for " 3819 "all threads\n"); 3820 unregister_netdevice_notifier(&pktgen_notifier_block); 3821 remove_proc_entry(PGCTRL, pg_proc_dir); 3822 proc_net_remove(&init_net, PG_PROC_DIR); 3823 return -ENODEV; 3824 } 3825 3826 return 0; 3827 } 3828 3829 static void __exit pg_cleanup(void) 3830 { 3831 struct pktgen_thread *t; 3832 struct list_head *q, *n; 3833 wait_queue_head_t queue; 3834 init_waitqueue_head(&queue); 3835 3836 /* Stop all interfaces & threads */ 3837 3838 list_for_each_safe(q, n, &pktgen_threads) { 3839 t = list_entry(q, struct pktgen_thread, th_list); 3840 kthread_stop(t->tsk); 3841 kfree(t); 3842 } 3843 3844 /* Un-register us from receiving netdevice events */ 3845 unregister_netdevice_notifier(&pktgen_notifier_block); 3846 3847 /* Clean up proc file system */ 3848 remove_proc_entry(PGCTRL, pg_proc_dir); 3849 proc_net_remove(&init_net, PG_PROC_DIR); 3850 } 3851 3852 module_init(pg_init); 3853 module_exit(pg_cleanup); 3854 3855 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se"); 3856 MODULE_DESCRIPTION("Packet Generator tool"); 3857 MODULE_LICENSE("GPL"); 3858 module_param(pg_count_d, int, 0); 3859 module_param(pg_delay_d, int, 0); 3860 module_param(pg_clone_skb_d, int, 0); 3861 module_param(debug, int, 0); 3862