1 /* 2 * Authors: 3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se> 4 * Uppsala University and 5 * Swedish University of Agricultural Sciences 6 * 7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> 8 * Ben Greear <greearb@candelatech.com> 9 * Jens Låås <jens.laas@data.slu.se> 10 * 11 * This program is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License 13 * as published by the Free Software Foundation; either version 14 * 2 of the License, or (at your option) any later version. 15 * 16 * 17 * A tool for loading the network with preconfigurated packets. 18 * The tool is implemented as a linux module. Parameters are output 19 * device, delay (to hard_xmit), number of packets, and whether 20 * to use multiple SKBs or just the same one. 21 * pktgen uses the installed interface's output routine. 22 * 23 * Additional hacking by: 24 * 25 * Jens.Laas@data.slu.se 26 * Improved by ANK. 010120. 27 * Improved by ANK even more. 010212. 28 * MAC address typo fixed. 010417 --ro 29 * Integrated. 020301 --DaveM 30 * Added multiskb option 020301 --DaveM 31 * Scaling of results. 020417--sigurdur@linpro.no 32 * Significant re-work of the module: 33 * * Convert to threaded model to more efficiently be able to transmit 34 * and receive on multiple interfaces at once. 35 * * Converted many counters to __u64 to allow longer runs. 36 * * Allow configuration of ranges, like min/max IP address, MACs, 37 * and UDP-ports, for both source and destination, and can 38 * set to use a random distribution or sequentially walk the range. 39 * * Can now change most values after starting. 40 * * Place 12-byte packet in UDP payload with magic number, 41 * sequence number, and timestamp. 42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and 43 * latencies (with micro-second) precision. 44 * * Add IOCTL interface to easily get counters & configuration. 45 * --Ben Greear <greearb@candelatech.com> 46 * 47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct 48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0 49 * as a "fastpath" with a configurable number of clones after alloc's. 50 * clone_skb=0 means all packets are allocated this also means ranges time 51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100 52 * clones. 53 * 54 * Also moved to /proc/net/pktgen/ 55 * --ro 56 * 57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever 58 * mistakes. Also merged in DaveM's patch in the -pre6 patch. 59 * --Ben Greear <greearb@candelatech.com> 60 * 61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br) 62 * 63 * 64 * 021124 Finished major redesign and rewrite for new functionality. 65 * See Documentation/networking/pktgen.txt for how to use this. 66 * 67 * The new operation: 68 * For each CPU one thread/process is created at start. This process checks 69 * for running devices in the if_list and sends packets until count is 0 it 70 * also the thread checks the thread->control which is used for inter-process 71 * communication. controlling process "posts" operations to the threads this 72 * way. The if_lock should be possible to remove when add/rem_device is merged 73 * into this too. 74 * 75 * By design there should only be *one* "controlling" process. In practice 76 * multiple write accesses gives unpredictable result. Understood by "write" 77 * to /proc gives result code thats should be read be the "writer". 78 * For practical use this should be no problem. 79 * 80 * Note when adding devices to a specific CPU there good idea to also assign 81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU. 82 * --ro 83 * 84 * Fix refcount off by one if first packet fails, potential null deref, 85 * memleak 030710- KJP 86 * 87 * First "ranges" functionality for ipv6 030726 --ro 88 * 89 * Included flow support. 030802 ANK. 90 * 91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org> 92 * 93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419 94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604 95 * 96 * New xmit() return, do_div and misc clean up by Stephen Hemminger 97 * <shemminger@osdl.org> 040923 98 * 99 * Randy Dunlap fixed u64 printk compiler waring 100 * 101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org> 102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213 103 * 104 * Corrections from Nikolai Malykh (nmalykh@bilim.com) 105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230 106 * 107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com> 108 * 050103 109 * 110 * MPLS support by Steven Whitehouse <steve@chygwyn.com> 111 * 112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com> 113 * 114 * Fixed src_mac command to set source mac of packet to value specified in 115 * command by Adit Ranadive <adit.262@gmail.com> 116 * 117 */ 118 #include <linux/sys.h> 119 #include <linux/types.h> 120 #include <linux/module.h> 121 #include <linux/moduleparam.h> 122 #include <linux/kernel.h> 123 #include <linux/mutex.h> 124 #include <linux/sched.h> 125 #include <linux/slab.h> 126 #include <linux/vmalloc.h> 127 #include <linux/unistd.h> 128 #include <linux/string.h> 129 #include <linux/ptrace.h> 130 #include <linux/errno.h> 131 #include <linux/ioport.h> 132 #include <linux/interrupt.h> 133 #include <linux/capability.h> 134 #include <linux/hrtimer.h> 135 #include <linux/freezer.h> 136 #include <linux/delay.h> 137 #include <linux/timer.h> 138 #include <linux/list.h> 139 #include <linux/init.h> 140 #include <linux/skbuff.h> 141 #include <linux/netdevice.h> 142 #include <linux/inet.h> 143 #include <linux/inetdevice.h> 144 #include <linux/rtnetlink.h> 145 #include <linux/if_arp.h> 146 #include <linux/if_vlan.h> 147 #include <linux/in.h> 148 #include <linux/ip.h> 149 #include <linux/ipv6.h> 150 #include <linux/udp.h> 151 #include <linux/proc_fs.h> 152 #include <linux/seq_file.h> 153 #include <linux/wait.h> 154 #include <linux/etherdevice.h> 155 #include <linux/kthread.h> 156 #include <net/net_namespace.h> 157 #include <net/checksum.h> 158 #include <net/ipv6.h> 159 #include <net/addrconf.h> 160 #ifdef CONFIG_XFRM 161 #include <net/xfrm.h> 162 #endif 163 #include <asm/byteorder.h> 164 #include <linux/rcupdate.h> 165 #include <linux/bitops.h> 166 #include <linux/io.h> 167 #include <linux/timex.h> 168 #include <linux/uaccess.h> 169 #include <asm/dma.h> 170 #include <asm/div64.h> /* do_div */ 171 172 #define VERSION "2.72" 173 #define IP_NAME_SZ 32 174 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */ 175 #define MPLS_STACK_BOTTOM htonl(0x00000100) 176 177 /* Device flag bits */ 178 #define F_IPSRC_RND (1<<0) /* IP-Src Random */ 179 #define F_IPDST_RND (1<<1) /* IP-Dst Random */ 180 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */ 181 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */ 182 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */ 183 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */ 184 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */ 185 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */ 186 #define F_MPLS_RND (1<<8) /* Random MPLS labels */ 187 #define F_VID_RND (1<<9) /* Random VLAN ID */ 188 #define F_SVID_RND (1<<10) /* Random SVLAN ID */ 189 #define F_FLOW_SEQ (1<<11) /* Sequential flows */ 190 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */ 191 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */ 192 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */ 193 194 /* Thread control flag bits */ 195 #define T_STOP (1<<0) /* Stop run */ 196 #define T_RUN (1<<1) /* Start run */ 197 #define T_REMDEVALL (1<<2) /* Remove all devs */ 198 #define T_REMDEV (1<<3) /* Remove one dev */ 199 200 /* If lock -- can be removed after some work */ 201 #define if_lock(t) spin_lock(&(t->if_lock)); 202 #define if_unlock(t) spin_unlock(&(t->if_lock)); 203 204 /* Used to help with determining the pkts on receive */ 205 #define PKTGEN_MAGIC 0xbe9be955 206 #define PG_PROC_DIR "pktgen" 207 #define PGCTRL "pgctrl" 208 static struct proc_dir_entry *pg_proc_dir; 209 210 #define MAX_CFLOWS 65536 211 212 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4) 213 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4) 214 215 struct flow_state { 216 __be32 cur_daddr; 217 int count; 218 #ifdef CONFIG_XFRM 219 struct xfrm_state *x; 220 #endif 221 __u32 flags; 222 }; 223 224 /* flow flag bits */ 225 #define F_INIT (1<<0) /* flow has been initialized */ 226 227 struct pktgen_dev { 228 /* 229 * Try to keep frequent/infrequent used vars. separated. 230 */ 231 struct proc_dir_entry *entry; /* proc file */ 232 struct pktgen_thread *pg_thread;/* the owner */ 233 struct list_head list; /* chaining in the thread's run-queue */ 234 235 int running; /* if false, the test will stop */ 236 237 /* If min != max, then we will either do a linear iteration, or 238 * we will do a random selection from within the range. 239 */ 240 __u32 flags; 241 int removal_mark; /* non-zero => the device is marked for 242 * removal by worker thread */ 243 244 int min_pkt_size; /* = ETH_ZLEN; */ 245 int max_pkt_size; /* = ETH_ZLEN; */ 246 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */ 247 int nfrags; 248 u64 delay; /* nano-seconds */ 249 250 __u64 count; /* Default No packets to send */ 251 __u64 sofar; /* How many pkts we've sent so far */ 252 __u64 tx_bytes; /* How many bytes we've transmitted */ 253 __u64 errors; /* Errors when trying to transmit, */ 254 255 /* runtime counters relating to clone_skb */ 256 257 __u64 allocated_skbs; 258 __u32 clone_count; 259 int last_ok; /* Was last skb sent? 260 * Or a failed transmit of some sort? 261 * This will keep sequence numbers in order 262 */ 263 ktime_t next_tx; 264 ktime_t started_at; 265 ktime_t stopped_at; 266 u64 idle_acc; /* nano-seconds */ 267 268 __u32 seq_num; 269 270 int clone_skb; /* 271 * Use multiple SKBs during packet gen. 272 * If this number is greater than 1, then 273 * that many copies of the same packet will be 274 * sent before a new packet is allocated. 275 * If you want to send 1024 identical packets 276 * before creating a new packet, 277 * set clone_skb to 1024. 278 */ 279 280 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 281 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 282 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 283 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 284 285 struct in6_addr in6_saddr; 286 struct in6_addr in6_daddr; 287 struct in6_addr cur_in6_daddr; 288 struct in6_addr cur_in6_saddr; 289 /* For ranges */ 290 struct in6_addr min_in6_daddr; 291 struct in6_addr max_in6_daddr; 292 struct in6_addr min_in6_saddr; 293 struct in6_addr max_in6_saddr; 294 295 /* If we're doing ranges, random or incremental, then this 296 * defines the min/max for those ranges. 297 */ 298 __be32 saddr_min; /* inclusive, source IP address */ 299 __be32 saddr_max; /* exclusive, source IP address */ 300 __be32 daddr_min; /* inclusive, dest IP address */ 301 __be32 daddr_max; /* exclusive, dest IP address */ 302 303 __u16 udp_src_min; /* inclusive, source UDP port */ 304 __u16 udp_src_max; /* exclusive, source UDP port */ 305 __u16 udp_dst_min; /* inclusive, dest UDP port */ 306 __u16 udp_dst_max; /* exclusive, dest UDP port */ 307 308 /* DSCP + ECN */ 309 __u8 tos; /* six MSB of (former) IPv4 TOS 310 are for dscp codepoint */ 311 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 312 (see RFC 3260, sec. 4) */ 313 314 /* MPLS */ 315 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */ 316 __be32 labels[MAX_MPLS_LABELS]; 317 318 /* VLAN/SVLAN (802.1Q/Q-in-Q) */ 319 __u8 vlan_p; 320 __u8 vlan_cfi; 321 __u16 vlan_id; /* 0xffff means no vlan tag */ 322 323 __u8 svlan_p; 324 __u8 svlan_cfi; 325 __u16 svlan_id; /* 0xffff means no svlan tag */ 326 327 __u32 src_mac_count; /* How many MACs to iterate through */ 328 __u32 dst_mac_count; /* How many MACs to iterate through */ 329 330 unsigned char dst_mac[ETH_ALEN]; 331 unsigned char src_mac[ETH_ALEN]; 332 333 __u32 cur_dst_mac_offset; 334 __u32 cur_src_mac_offset; 335 __be32 cur_saddr; 336 __be32 cur_daddr; 337 __u16 ip_id; 338 __u16 cur_udp_dst; 339 __u16 cur_udp_src; 340 __u16 cur_queue_map; 341 __u32 cur_pkt_size; 342 __u32 last_pkt_size; 343 344 __u8 hh[14]; 345 /* = { 346 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, 347 348 We fill in SRC address later 349 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 350 0x08, 0x00 351 }; 352 */ 353 __u16 pad; /* pad out the hh struct to an even 16 bytes */ 354 355 struct sk_buff *skb; /* skb we are to transmit next, used for when we 356 * are transmitting the same one multiple times 357 */ 358 struct net_device *odev; /* The out-going device. 359 * Note that the device should have it's 360 * pg_info pointer pointing back to this 361 * device. 362 * Set when the user specifies the out-going 363 * device name (not when the inject is 364 * started as it used to do.) 365 */ 366 char odevname[32]; 367 struct flow_state *flows; 368 unsigned cflows; /* Concurrent flows (config) */ 369 unsigned lflow; /* Flow length (config) */ 370 unsigned nflows; /* accumulated flows (stats) */ 371 unsigned curfl; /* current sequenced flow (state)*/ 372 373 u16 queue_map_min; 374 u16 queue_map_max; 375 376 #ifdef CONFIG_XFRM 377 __u8 ipsmode; /* IPSEC mode (config) */ 378 __u8 ipsproto; /* IPSEC type (config) */ 379 #endif 380 char result[512]; 381 }; 382 383 struct pktgen_hdr { 384 __be32 pgh_magic; 385 __be32 seq_num; 386 __be32 tv_sec; 387 __be32 tv_usec; 388 }; 389 390 struct pktgen_thread { 391 spinlock_t if_lock; /* for list of devices */ 392 struct list_head if_list; /* All device here */ 393 struct list_head th_list; 394 struct task_struct *tsk; 395 char result[512]; 396 397 /* Field for thread to receive "posted" events terminate, 398 stop ifs etc. */ 399 400 u32 control; 401 int cpu; 402 403 wait_queue_head_t queue; 404 struct completion start_done; 405 }; 406 407 #define REMOVE 1 408 #define FIND 0 409 410 static inline ktime_t ktime_now(void) 411 { 412 struct timespec ts; 413 ktime_get_ts(&ts); 414 415 return timespec_to_ktime(ts); 416 } 417 418 /* This works even if 32 bit because of careful byte order choice */ 419 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2) 420 { 421 return cmp1.tv64 < cmp2.tv64; 422 } 423 424 static const char version[] = 425 "pktgen " VERSION ": Packet Generator for packet performance testing.\n"; 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, bool exact); 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->odevname); 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; 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->odevname); 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->odevname); 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 bool exact = (remove == FIND); 1822 1823 list_for_each_entry(t, &pktgen_threads, th_list) { 1824 pkt_dev = pktgen_find_dev(t, ifname, exact); 1825 if (pkt_dev) { 1826 if (remove) { 1827 if_lock(t); 1828 pkt_dev->removal_mark = 1; 1829 t->control |= T_REMDEV; 1830 if_unlock(t); 1831 } 1832 break; 1833 } 1834 } 1835 return pkt_dev; 1836 } 1837 1838 /* 1839 * mark a device for removal 1840 */ 1841 static void pktgen_mark_device(const char *ifname) 1842 { 1843 struct pktgen_dev *pkt_dev = NULL; 1844 const int max_tries = 10, msec_per_try = 125; 1845 int i = 0; 1846 1847 mutex_lock(&pktgen_thread_lock); 1848 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname); 1849 1850 while (1) { 1851 1852 pkt_dev = __pktgen_NN_threads(ifname, REMOVE); 1853 if (pkt_dev == NULL) 1854 break; /* success */ 1855 1856 mutex_unlock(&pktgen_thread_lock); 1857 pr_debug("pktgen: pktgen_mark_device waiting for %s " 1858 "to disappear....\n", ifname); 1859 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1860 mutex_lock(&pktgen_thread_lock); 1861 1862 if (++i >= max_tries) { 1863 printk(KERN_ERR "pktgen_mark_device: timed out after " 1864 "waiting %d msec for device %s to be removed\n", 1865 msec_per_try * i, ifname); 1866 break; 1867 } 1868 1869 } 1870 1871 mutex_unlock(&pktgen_thread_lock); 1872 } 1873 1874 static void pktgen_change_name(struct net_device *dev) 1875 { 1876 struct pktgen_thread *t; 1877 1878 list_for_each_entry(t, &pktgen_threads, th_list) { 1879 struct pktgen_dev *pkt_dev; 1880 1881 list_for_each_entry(pkt_dev, &t->if_list, list) { 1882 if (pkt_dev->odev != dev) 1883 continue; 1884 1885 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 1886 1887 pkt_dev->entry = proc_create_data(dev->name, 0600, 1888 pg_proc_dir, 1889 &pktgen_if_fops, 1890 pkt_dev); 1891 if (!pkt_dev->entry) 1892 printk(KERN_ERR "pktgen: can't move proc " 1893 " entry for '%s'\n", dev->name); 1894 break; 1895 } 1896 } 1897 } 1898 1899 static int pktgen_device_event(struct notifier_block *unused, 1900 unsigned long event, void *ptr) 1901 { 1902 struct net_device *dev = ptr; 1903 1904 if (!net_eq(dev_net(dev), &init_net)) 1905 return NOTIFY_DONE; 1906 1907 /* It is OK that we do not hold the group lock right now, 1908 * as we run under the RTNL lock. 1909 */ 1910 1911 switch (event) { 1912 case NETDEV_CHANGENAME: 1913 pktgen_change_name(dev); 1914 break; 1915 1916 case NETDEV_UNREGISTER: 1917 pktgen_mark_device(dev->name); 1918 break; 1919 } 1920 1921 return NOTIFY_DONE; 1922 } 1923 1924 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev, 1925 const char *ifname) 1926 { 1927 char b[IFNAMSIZ+5]; 1928 int i = 0; 1929 1930 for (i = 0; ifname[i] != '@'; i++) { 1931 if (i == IFNAMSIZ) 1932 break; 1933 1934 b[i] = ifname[i]; 1935 } 1936 b[i] = 0; 1937 1938 return dev_get_by_name(&init_net, b); 1939 } 1940 1941 1942 /* Associate pktgen_dev with a device. */ 1943 1944 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname) 1945 { 1946 struct net_device *odev; 1947 int err; 1948 1949 /* Clean old setups */ 1950 if (pkt_dev->odev) { 1951 dev_put(pkt_dev->odev); 1952 pkt_dev->odev = NULL; 1953 } 1954 1955 odev = pktgen_dev_get_by_name(pkt_dev, ifname); 1956 if (!odev) { 1957 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname); 1958 return -ENODEV; 1959 } 1960 1961 if (odev->type != ARPHRD_ETHER) { 1962 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname); 1963 err = -EINVAL; 1964 } else if (!netif_running(odev)) { 1965 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname); 1966 err = -ENETDOWN; 1967 } else { 1968 pkt_dev->odev = odev; 1969 return 0; 1970 } 1971 1972 dev_put(odev); 1973 return err; 1974 } 1975 1976 /* Read pkt_dev from the interface and set up internal pktgen_dev 1977 * structure to have the right information to create/send packets 1978 */ 1979 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 1980 { 1981 int ntxq; 1982 1983 if (!pkt_dev->odev) { 1984 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in " 1985 "setup_inject.\n"); 1986 sprintf(pkt_dev->result, 1987 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 1988 return; 1989 } 1990 1991 /* make sure that we don't pick a non-existing transmit queue */ 1992 ntxq = pkt_dev->odev->real_num_tx_queues; 1993 1994 if (ntxq <= pkt_dev->queue_map_min) { 1995 printk(KERN_WARNING "pktgen: WARNING: Requested " 1996 "queue_map_min (zero-based) (%d) exceeds valid range " 1997 "[0 - %d] for (%d) queues on %s, resetting\n", 1998 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, 1999 pkt_dev->odevname); 2000 pkt_dev->queue_map_min = ntxq - 1; 2001 } 2002 if (pkt_dev->queue_map_max >= ntxq) { 2003 printk(KERN_WARNING "pktgen: WARNING: Requested " 2004 "queue_map_max (zero-based) (%d) exceeds valid range " 2005 "[0 - %d] for (%d) queues on %s, resetting\n", 2006 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, 2007 pkt_dev->odevname); 2008 pkt_dev->queue_map_max = ntxq - 1; 2009 } 2010 2011 /* Default to the interface's mac if not explicitly set. */ 2012 2013 if (is_zero_ether_addr(pkt_dev->src_mac)) 2014 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN); 2015 2016 /* Set up Dest MAC */ 2017 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 2018 2019 /* Set up pkt size */ 2020 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2021 2022 if (pkt_dev->flags & F_IPV6) { 2023 /* 2024 * Skip this automatic address setting until locks or functions 2025 * gets exported 2026 */ 2027 2028 #ifdef NOTNOW 2029 int i, set = 0, err = 1; 2030 struct inet6_dev *idev; 2031 2032 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2033 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2034 set = 1; 2035 break; 2036 } 2037 2038 if (!set) { 2039 2040 /* 2041 * Use linklevel address if unconfigured. 2042 * 2043 * use ipv6_get_lladdr if/when it's get exported 2044 */ 2045 2046 rcu_read_lock(); 2047 idev = __in6_dev_get(pkt_dev->odev); 2048 if (idev) { 2049 struct inet6_ifaddr *ifp; 2050 2051 read_lock_bh(&idev->lock); 2052 for (ifp = idev->addr_list; ifp; 2053 ifp = ifp->if_next) { 2054 if (ifp->scope == IFA_LINK && 2055 !(ifp->flags & IFA_F_TENTATIVE)) { 2056 ipv6_addr_copy(&pkt_dev-> 2057 cur_in6_saddr, 2058 &ifp->addr); 2059 err = 0; 2060 break; 2061 } 2062 } 2063 read_unlock_bh(&idev->lock); 2064 } 2065 rcu_read_unlock(); 2066 if (err) 2067 printk(KERN_ERR "pktgen: ERROR: IPv6 link " 2068 "address not availble.\n"); 2069 } 2070 #endif 2071 } else { 2072 pkt_dev->saddr_min = 0; 2073 pkt_dev->saddr_max = 0; 2074 if (strlen(pkt_dev->src_min) == 0) { 2075 2076 struct in_device *in_dev; 2077 2078 rcu_read_lock(); 2079 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2080 if (in_dev) { 2081 if (in_dev->ifa_list) { 2082 pkt_dev->saddr_min = 2083 in_dev->ifa_list->ifa_address; 2084 pkt_dev->saddr_max = pkt_dev->saddr_min; 2085 } 2086 } 2087 rcu_read_unlock(); 2088 } else { 2089 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2090 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2091 } 2092 2093 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2094 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2095 } 2096 /* Initialize current values. */ 2097 pkt_dev->cur_dst_mac_offset = 0; 2098 pkt_dev->cur_src_mac_offset = 0; 2099 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2100 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2101 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2102 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2103 pkt_dev->nflows = 0; 2104 } 2105 2106 2107 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) 2108 { 2109 ktime_t start_time, end_time; 2110 s64 remaining; 2111 struct hrtimer_sleeper t; 2112 2113 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); 2114 hrtimer_set_expires(&t.timer, spin_until); 2115 2116 remaining = ktime_to_us(hrtimer_expires_remaining(&t.timer)); 2117 if (remaining <= 0) { 2118 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2119 return; 2120 } 2121 2122 start_time = ktime_now(); 2123 if (remaining < 100) 2124 udelay(remaining); /* really small just spin */ 2125 else { 2126 /* see do_nanosleep */ 2127 hrtimer_init_sleeper(&t, current); 2128 do { 2129 set_current_state(TASK_INTERRUPTIBLE); 2130 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS); 2131 if (!hrtimer_active(&t.timer)) 2132 t.task = NULL; 2133 2134 if (likely(t.task)) 2135 schedule(); 2136 2137 hrtimer_cancel(&t.timer); 2138 } while (t.task && pkt_dev->running && !signal_pending(current)); 2139 __set_current_state(TASK_RUNNING); 2140 } 2141 end_time = ktime_now(); 2142 2143 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); 2144 pkt_dev->next_tx = ktime_add_ns(end_time, pkt_dev->delay); 2145 } 2146 2147 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2148 { 2149 pkt_dev->pkt_overhead = 0; 2150 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2151 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2152 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2153 } 2154 2155 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) 2156 { 2157 return !!(pkt_dev->flows[flow].flags & F_INIT); 2158 } 2159 2160 static inline int f_pick(struct pktgen_dev *pkt_dev) 2161 { 2162 int flow = pkt_dev->curfl; 2163 2164 if (pkt_dev->flags & F_FLOW_SEQ) { 2165 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2166 /* reset time */ 2167 pkt_dev->flows[flow].count = 0; 2168 pkt_dev->flows[flow].flags = 0; 2169 pkt_dev->curfl += 1; 2170 if (pkt_dev->curfl >= pkt_dev->cflows) 2171 pkt_dev->curfl = 0; /*reset */ 2172 } 2173 } else { 2174 flow = random32() % pkt_dev->cflows; 2175 pkt_dev->curfl = flow; 2176 2177 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2178 pkt_dev->flows[flow].count = 0; 2179 pkt_dev->flows[flow].flags = 0; 2180 } 2181 } 2182 2183 return pkt_dev->curfl; 2184 } 2185 2186 2187 #ifdef CONFIG_XFRM 2188 /* If there was already an IPSEC SA, we keep it as is, else 2189 * we go look for it ... 2190 */ 2191 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2192 { 2193 struct xfrm_state *x = pkt_dev->flows[flow].x; 2194 if (!x) { 2195 /*slow path: we dont already have xfrm_state*/ 2196 x = xfrm_stateonly_find(&init_net, 2197 (xfrm_address_t *)&pkt_dev->cur_daddr, 2198 (xfrm_address_t *)&pkt_dev->cur_saddr, 2199 AF_INET, 2200 pkt_dev->ipsmode, 2201 pkt_dev->ipsproto, 0); 2202 if (x) { 2203 pkt_dev->flows[flow].x = x; 2204 set_pkt_overhead(pkt_dev); 2205 pkt_dev->pkt_overhead += x->props.header_len; 2206 } 2207 2208 } 2209 } 2210 #endif 2211 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2212 { 2213 2214 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2215 pkt_dev->cur_queue_map = smp_processor_id(); 2216 2217 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { 2218 __u16 t; 2219 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2220 t = random32() % 2221 (pkt_dev->queue_map_max - 2222 pkt_dev->queue_map_min + 1) 2223 + pkt_dev->queue_map_min; 2224 } else { 2225 t = pkt_dev->cur_queue_map + 1; 2226 if (t > pkt_dev->queue_map_max) 2227 t = pkt_dev->queue_map_min; 2228 } 2229 pkt_dev->cur_queue_map = t; 2230 } 2231 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2232 } 2233 2234 /* Increment/randomize headers according to flags and current values 2235 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2236 */ 2237 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2238 { 2239 __u32 imn; 2240 __u32 imx; 2241 int flow = 0; 2242 2243 if (pkt_dev->cflows) 2244 flow = f_pick(pkt_dev); 2245 2246 /* Deal with source MAC */ 2247 if (pkt_dev->src_mac_count > 1) { 2248 __u32 mc; 2249 __u32 tmp; 2250 2251 if (pkt_dev->flags & F_MACSRC_RND) 2252 mc = random32() % pkt_dev->src_mac_count; 2253 else { 2254 mc = pkt_dev->cur_src_mac_offset++; 2255 if (pkt_dev->cur_src_mac_offset >= 2256 pkt_dev->src_mac_count) 2257 pkt_dev->cur_src_mac_offset = 0; 2258 } 2259 2260 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2261 pkt_dev->hh[11] = tmp; 2262 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2263 pkt_dev->hh[10] = tmp; 2264 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2265 pkt_dev->hh[9] = tmp; 2266 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2267 pkt_dev->hh[8] = tmp; 2268 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2269 pkt_dev->hh[7] = tmp; 2270 } 2271 2272 /* Deal with Destination MAC */ 2273 if (pkt_dev->dst_mac_count > 1) { 2274 __u32 mc; 2275 __u32 tmp; 2276 2277 if (pkt_dev->flags & F_MACDST_RND) 2278 mc = random32() % pkt_dev->dst_mac_count; 2279 2280 else { 2281 mc = pkt_dev->cur_dst_mac_offset++; 2282 if (pkt_dev->cur_dst_mac_offset >= 2283 pkt_dev->dst_mac_count) { 2284 pkt_dev->cur_dst_mac_offset = 0; 2285 } 2286 } 2287 2288 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2289 pkt_dev->hh[5] = tmp; 2290 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2291 pkt_dev->hh[4] = tmp; 2292 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2293 pkt_dev->hh[3] = tmp; 2294 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2295 pkt_dev->hh[2] = tmp; 2296 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2297 pkt_dev->hh[1] = tmp; 2298 } 2299 2300 if (pkt_dev->flags & F_MPLS_RND) { 2301 unsigned i; 2302 for (i = 0; i < pkt_dev->nr_labels; i++) 2303 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2304 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2305 ((__force __be32)random32() & 2306 htonl(0x000fffff)); 2307 } 2308 2309 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2310 pkt_dev->vlan_id = random32() & (4096-1); 2311 } 2312 2313 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2314 pkt_dev->svlan_id = random32() & (4096 - 1); 2315 } 2316 2317 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2318 if (pkt_dev->flags & F_UDPSRC_RND) 2319 pkt_dev->cur_udp_src = random32() % 2320 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2321 + pkt_dev->udp_src_min; 2322 2323 else { 2324 pkt_dev->cur_udp_src++; 2325 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2326 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2327 } 2328 } 2329 2330 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2331 if (pkt_dev->flags & F_UDPDST_RND) { 2332 pkt_dev->cur_udp_dst = random32() % 2333 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2334 + pkt_dev->udp_dst_min; 2335 } else { 2336 pkt_dev->cur_udp_dst++; 2337 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2338 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2339 } 2340 } 2341 2342 if (!(pkt_dev->flags & F_IPV6)) { 2343 2344 imn = ntohl(pkt_dev->saddr_min); 2345 imx = ntohl(pkt_dev->saddr_max); 2346 if (imn < imx) { 2347 __u32 t; 2348 if (pkt_dev->flags & F_IPSRC_RND) 2349 t = random32() % (imx - imn) + imn; 2350 else { 2351 t = ntohl(pkt_dev->cur_saddr); 2352 t++; 2353 if (t > imx) 2354 t = imn; 2355 2356 } 2357 pkt_dev->cur_saddr = htonl(t); 2358 } 2359 2360 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2361 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2362 } else { 2363 imn = ntohl(pkt_dev->daddr_min); 2364 imx = ntohl(pkt_dev->daddr_max); 2365 if (imn < imx) { 2366 __u32 t; 2367 __be32 s; 2368 if (pkt_dev->flags & F_IPDST_RND) { 2369 2370 t = random32() % (imx - imn) + imn; 2371 s = htonl(t); 2372 2373 while (ipv4_is_loopback(s) || 2374 ipv4_is_multicast(s) || 2375 ipv4_is_lbcast(s) || 2376 ipv4_is_zeronet(s) || 2377 ipv4_is_local_multicast(s)) { 2378 t = random32() % (imx - imn) + imn; 2379 s = htonl(t); 2380 } 2381 pkt_dev->cur_daddr = s; 2382 } else { 2383 t = ntohl(pkt_dev->cur_daddr); 2384 t++; 2385 if (t > imx) { 2386 t = imn; 2387 } 2388 pkt_dev->cur_daddr = htonl(t); 2389 } 2390 } 2391 if (pkt_dev->cflows) { 2392 pkt_dev->flows[flow].flags |= F_INIT; 2393 pkt_dev->flows[flow].cur_daddr = 2394 pkt_dev->cur_daddr; 2395 #ifdef CONFIG_XFRM 2396 if (pkt_dev->flags & F_IPSEC_ON) 2397 get_ipsec_sa(pkt_dev, flow); 2398 #endif 2399 pkt_dev->nflows++; 2400 } 2401 } 2402 } else { /* IPV6 * */ 2403 2404 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 && 2405 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 && 2406 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 && 2407 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ; 2408 else { 2409 int i; 2410 2411 /* Only random destinations yet */ 2412 2413 for (i = 0; i < 4; i++) { 2414 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2415 (((__force __be32)random32() | 2416 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2417 pkt_dev->max_in6_daddr.s6_addr32[i]); 2418 } 2419 } 2420 } 2421 2422 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2423 __u32 t; 2424 if (pkt_dev->flags & F_TXSIZE_RND) { 2425 t = random32() % 2426 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2427 + pkt_dev->min_pkt_size; 2428 } else { 2429 t = pkt_dev->cur_pkt_size + 1; 2430 if (t > pkt_dev->max_pkt_size) 2431 t = pkt_dev->min_pkt_size; 2432 } 2433 pkt_dev->cur_pkt_size = t; 2434 } 2435 2436 set_cur_queue_map(pkt_dev); 2437 2438 pkt_dev->flows[flow].count++; 2439 } 2440 2441 2442 #ifdef CONFIG_XFRM 2443 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2444 { 2445 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2446 int err = 0; 2447 struct iphdr *iph; 2448 2449 if (!x) 2450 return 0; 2451 /* XXX: we dont support tunnel mode for now until 2452 * we resolve the dst issue */ 2453 if (x->props.mode != XFRM_MODE_TRANSPORT) 2454 return 0; 2455 2456 spin_lock(&x->lock); 2457 iph = ip_hdr(skb); 2458 2459 err = x->outer_mode->output(x, skb); 2460 if (err) 2461 goto error; 2462 err = x->type->output(x, skb); 2463 if (err) 2464 goto error; 2465 2466 x->curlft.bytes += skb->len; 2467 x->curlft.packets++; 2468 error: 2469 spin_unlock(&x->lock); 2470 return err; 2471 } 2472 2473 static void free_SAs(struct pktgen_dev *pkt_dev) 2474 { 2475 if (pkt_dev->cflows) { 2476 /* let go of the SAs if we have them */ 2477 int i = 0; 2478 for (; i < pkt_dev->cflows; i++) { 2479 struct xfrm_state *x = pkt_dev->flows[i].x; 2480 if (x) { 2481 xfrm_state_put(x); 2482 pkt_dev->flows[i].x = NULL; 2483 } 2484 } 2485 } 2486 } 2487 2488 static int process_ipsec(struct pktgen_dev *pkt_dev, 2489 struct sk_buff *skb, __be16 protocol) 2490 { 2491 if (pkt_dev->flags & F_IPSEC_ON) { 2492 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2493 int nhead = 0; 2494 if (x) { 2495 int ret; 2496 __u8 *eth; 2497 nhead = x->props.header_len - skb_headroom(skb); 2498 if (nhead > 0) { 2499 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2500 if (ret < 0) { 2501 printk(KERN_ERR "Error expanding " 2502 "ipsec packet %d\n", ret); 2503 goto err; 2504 } 2505 } 2506 2507 /* ipsec is not expecting ll header */ 2508 skb_pull(skb, ETH_HLEN); 2509 ret = pktgen_output_ipsec(skb, pkt_dev); 2510 if (ret) { 2511 printk(KERN_ERR "Error creating ipsec " 2512 "packet %d\n", ret); 2513 goto err; 2514 } 2515 /* restore ll */ 2516 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2517 memcpy(eth, pkt_dev->hh, 12); 2518 *(u16 *) ð[12] = protocol; 2519 } 2520 } 2521 return 1; 2522 err: 2523 kfree_skb(skb); 2524 return 0; 2525 } 2526 #endif 2527 2528 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2529 { 2530 unsigned i; 2531 for (i = 0; i < pkt_dev->nr_labels; i++) 2532 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2533 2534 mpls--; 2535 *mpls |= MPLS_STACK_BOTTOM; 2536 } 2537 2538 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2539 unsigned int prio) 2540 { 2541 return htons(id | (cfi << 12) | (prio << 13)); 2542 } 2543 2544 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2545 struct pktgen_dev *pkt_dev) 2546 { 2547 struct sk_buff *skb = NULL; 2548 __u8 *eth; 2549 struct udphdr *udph; 2550 int datalen, iplen; 2551 struct iphdr *iph; 2552 struct pktgen_hdr *pgh = NULL; 2553 __be16 protocol = htons(ETH_P_IP); 2554 __be32 *mpls; 2555 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2556 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2557 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2558 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2559 u16 queue_map; 2560 2561 if (pkt_dev->nr_labels) 2562 protocol = htons(ETH_P_MPLS_UC); 2563 2564 if (pkt_dev->vlan_id != 0xffff) 2565 protocol = htons(ETH_P_8021Q); 2566 2567 /* Update any of the values, used when we're incrementing various 2568 * fields. 2569 */ 2570 queue_map = pkt_dev->cur_queue_map; 2571 mod_cur_headers(pkt_dev); 2572 2573 datalen = (odev->hard_header_len + 16) & ~0xf; 2574 skb = __netdev_alloc_skb(odev, 2575 pkt_dev->cur_pkt_size + 64 2576 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT); 2577 if (!skb) { 2578 sprintf(pkt_dev->result, "No memory"); 2579 return NULL; 2580 } 2581 2582 skb_reserve(skb, datalen); 2583 2584 /* Reserve for ethernet and IP header */ 2585 eth = (__u8 *) skb_push(skb, 14); 2586 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2587 if (pkt_dev->nr_labels) 2588 mpls_push(mpls, pkt_dev); 2589 2590 if (pkt_dev->vlan_id != 0xffff) { 2591 if (pkt_dev->svlan_id != 0xffff) { 2592 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2593 *svlan_tci = build_tci(pkt_dev->svlan_id, 2594 pkt_dev->svlan_cfi, 2595 pkt_dev->svlan_p); 2596 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2597 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2598 } 2599 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2600 *vlan_tci = build_tci(pkt_dev->vlan_id, 2601 pkt_dev->vlan_cfi, 2602 pkt_dev->vlan_p); 2603 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2604 *vlan_encapsulated_proto = htons(ETH_P_IP); 2605 } 2606 2607 skb->network_header = skb->tail; 2608 skb->transport_header = skb->network_header + sizeof(struct iphdr); 2609 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr)); 2610 skb_set_queue_mapping(skb, queue_map); 2611 iph = ip_hdr(skb); 2612 udph = udp_hdr(skb); 2613 2614 memcpy(eth, pkt_dev->hh, 12); 2615 *(__be16 *) & eth[12] = protocol; 2616 2617 /* Eth + IPh + UDPh + mpls */ 2618 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2619 pkt_dev->pkt_overhead; 2620 if (datalen < sizeof(struct pktgen_hdr)) 2621 datalen = sizeof(struct pktgen_hdr); 2622 2623 udph->source = htons(pkt_dev->cur_udp_src); 2624 udph->dest = htons(pkt_dev->cur_udp_dst); 2625 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2626 udph->check = 0; /* No checksum */ 2627 2628 iph->ihl = 5; 2629 iph->version = 4; 2630 iph->ttl = 32; 2631 iph->tos = pkt_dev->tos; 2632 iph->protocol = IPPROTO_UDP; /* UDP */ 2633 iph->saddr = pkt_dev->cur_saddr; 2634 iph->daddr = pkt_dev->cur_daddr; 2635 iph->id = htons(pkt_dev->ip_id); 2636 pkt_dev->ip_id++; 2637 iph->frag_off = 0; 2638 iplen = 20 + 8 + datalen; 2639 iph->tot_len = htons(iplen); 2640 iph->check = 0; 2641 iph->check = ip_fast_csum((void *)iph, iph->ihl); 2642 skb->protocol = protocol; 2643 skb->mac_header = (skb->network_header - ETH_HLEN - 2644 pkt_dev->pkt_overhead); 2645 skb->dev = odev; 2646 skb->pkt_type = PACKET_HOST; 2647 2648 if (pkt_dev->nfrags <= 0) { 2649 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 2650 memset(pgh + 1, 0, datalen - sizeof(struct pktgen_hdr)); 2651 } else { 2652 int frags = pkt_dev->nfrags; 2653 int i, len; 2654 2655 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 2656 2657 if (frags > MAX_SKB_FRAGS) 2658 frags = MAX_SKB_FRAGS; 2659 if (datalen > frags * PAGE_SIZE) { 2660 len = datalen - frags * PAGE_SIZE; 2661 memset(skb_put(skb, len), 0, len); 2662 datalen = frags * PAGE_SIZE; 2663 } 2664 2665 i = 0; 2666 while (datalen > 0) { 2667 struct page *page = alloc_pages(GFP_KERNEL | __GFP_ZERO, 0); 2668 skb_shinfo(skb)->frags[i].page = page; 2669 skb_shinfo(skb)->frags[i].page_offset = 0; 2670 skb_shinfo(skb)->frags[i].size = 2671 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 2672 datalen -= skb_shinfo(skb)->frags[i].size; 2673 skb->len += skb_shinfo(skb)->frags[i].size; 2674 skb->data_len += skb_shinfo(skb)->frags[i].size; 2675 i++; 2676 skb_shinfo(skb)->nr_frags = i; 2677 } 2678 2679 while (i < frags) { 2680 int rem; 2681 2682 if (i == 0) 2683 break; 2684 2685 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 2686 if (rem == 0) 2687 break; 2688 2689 skb_shinfo(skb)->frags[i - 1].size -= rem; 2690 2691 skb_shinfo(skb)->frags[i] = 2692 skb_shinfo(skb)->frags[i - 1]; 2693 get_page(skb_shinfo(skb)->frags[i].page); 2694 skb_shinfo(skb)->frags[i].page = 2695 skb_shinfo(skb)->frags[i - 1].page; 2696 skb_shinfo(skb)->frags[i].page_offset += 2697 skb_shinfo(skb)->frags[i - 1].size; 2698 skb_shinfo(skb)->frags[i].size = rem; 2699 i++; 2700 skb_shinfo(skb)->nr_frags = i; 2701 } 2702 } 2703 2704 /* Stamp the time, and sequence number, 2705 * convert them to network byte order 2706 */ 2707 if (pgh) { 2708 struct timeval timestamp; 2709 2710 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2711 pgh->seq_num = htonl(pkt_dev->seq_num); 2712 2713 do_gettimeofday(×tamp); 2714 pgh->tv_sec = htonl(timestamp.tv_sec); 2715 pgh->tv_usec = htonl(timestamp.tv_usec); 2716 } 2717 2718 #ifdef CONFIG_XFRM 2719 if (!process_ipsec(pkt_dev, skb, protocol)) 2720 return NULL; 2721 #endif 2722 2723 return skb; 2724 } 2725 2726 /* 2727 * scan_ip6, fmt_ip taken from dietlibc-0.21 2728 * Author Felix von Leitner <felix-dietlibc@fefe.de> 2729 * 2730 * Slightly modified for kernel. 2731 * Should be candidate for net/ipv4/utils.c 2732 * --ro 2733 */ 2734 2735 static unsigned int scan_ip6(const char *s, char ip[16]) 2736 { 2737 unsigned int i; 2738 unsigned int len = 0; 2739 unsigned long u; 2740 char suffix[16]; 2741 unsigned int prefixlen = 0; 2742 unsigned int suffixlen = 0; 2743 __be32 tmp; 2744 char *pos; 2745 2746 for (i = 0; i < 16; i++) 2747 ip[i] = 0; 2748 2749 for (;;) { 2750 if (*s == ':') { 2751 len++; 2752 if (s[1] == ':') { /* Found "::", skip to part 2 */ 2753 s += 2; 2754 len++; 2755 break; 2756 } 2757 s++; 2758 } 2759 2760 u = simple_strtoul(s, &pos, 16); 2761 i = pos - s; 2762 if (!i) 2763 return 0; 2764 if (prefixlen == 12 && s[i] == '.') { 2765 2766 /* the last 4 bytes may be written as IPv4 address */ 2767 2768 tmp = in_aton(s); 2769 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp)); 2770 return i + len; 2771 } 2772 ip[prefixlen++] = (u >> 8); 2773 ip[prefixlen++] = (u & 255); 2774 s += i; 2775 len += i; 2776 if (prefixlen == 16) 2777 return len; 2778 } 2779 2780 /* part 2, after "::" */ 2781 for (;;) { 2782 if (*s == ':') { 2783 if (suffixlen == 0) 2784 break; 2785 s++; 2786 len++; 2787 } else if (suffixlen != 0) 2788 break; 2789 2790 u = simple_strtol(s, &pos, 16); 2791 i = pos - s; 2792 if (!i) { 2793 if (*s) 2794 len--; 2795 break; 2796 } 2797 if (suffixlen + prefixlen <= 12 && s[i] == '.') { 2798 tmp = in_aton(s); 2799 memcpy((struct in_addr *)(suffix + suffixlen), &tmp, 2800 sizeof(tmp)); 2801 suffixlen += 4; 2802 len += strlen(s); 2803 break; 2804 } 2805 suffix[suffixlen++] = (u >> 8); 2806 suffix[suffixlen++] = (u & 255); 2807 s += i; 2808 len += i; 2809 if (prefixlen + suffixlen == 16) 2810 break; 2811 } 2812 for (i = 0; i < suffixlen; i++) 2813 ip[16 - suffixlen + i] = suffix[i]; 2814 return len; 2815 } 2816 2817 static char tohex(char hexdigit) 2818 { 2819 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0'; 2820 } 2821 2822 static int fmt_xlong(char *s, unsigned int i) 2823 { 2824 char *bak = s; 2825 *s = tohex((i >> 12) & 0xf); 2826 if (s != bak || *s != '0') 2827 ++s; 2828 *s = tohex((i >> 8) & 0xf); 2829 if (s != bak || *s != '0') 2830 ++s; 2831 *s = tohex((i >> 4) & 0xf); 2832 if (s != bak || *s != '0') 2833 ++s; 2834 *s = tohex(i & 0xf); 2835 return s - bak + 1; 2836 } 2837 2838 static unsigned int fmt_ip6(char *s, const char ip[16]) 2839 { 2840 unsigned int len; 2841 unsigned int i; 2842 unsigned int temp; 2843 unsigned int compressing; 2844 int j; 2845 2846 len = 0; 2847 compressing = 0; 2848 for (j = 0; j < 16; j += 2) { 2849 2850 #ifdef V4MAPPEDPREFIX 2851 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) { 2852 inet_ntoa_r(*(struct in_addr *)(ip + 12), s); 2853 temp = strlen(s); 2854 return len + temp; 2855 } 2856 #endif 2857 temp = ((unsigned long)(unsigned char)ip[j] << 8) + 2858 (unsigned long)(unsigned char)ip[j + 1]; 2859 if (temp == 0) { 2860 if (!compressing) { 2861 compressing = 1; 2862 if (j == 0) { 2863 *s++ = ':'; 2864 ++len; 2865 } 2866 } 2867 } else { 2868 if (compressing) { 2869 compressing = 0; 2870 *s++ = ':'; 2871 ++len; 2872 } 2873 i = fmt_xlong(s, temp); 2874 len += i; 2875 s += i; 2876 if (j < 14) { 2877 *s++ = ':'; 2878 ++len; 2879 } 2880 } 2881 } 2882 if (compressing) { 2883 *s++ = ':'; 2884 ++len; 2885 } 2886 *s = 0; 2887 return len; 2888 } 2889 2890 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2891 struct pktgen_dev *pkt_dev) 2892 { 2893 struct sk_buff *skb = NULL; 2894 __u8 *eth; 2895 struct udphdr *udph; 2896 int datalen; 2897 struct ipv6hdr *iph; 2898 struct pktgen_hdr *pgh = NULL; 2899 __be16 protocol = htons(ETH_P_IPV6); 2900 __be32 *mpls; 2901 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2902 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2903 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2904 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2905 u16 queue_map; 2906 2907 if (pkt_dev->nr_labels) 2908 protocol = htons(ETH_P_MPLS_UC); 2909 2910 if (pkt_dev->vlan_id != 0xffff) 2911 protocol = htons(ETH_P_8021Q); 2912 2913 /* Update any of the values, used when we're incrementing various 2914 * fields. 2915 */ 2916 queue_map = pkt_dev->cur_queue_map; 2917 mod_cur_headers(pkt_dev); 2918 2919 skb = __netdev_alloc_skb(odev, 2920 pkt_dev->cur_pkt_size + 64 2921 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT); 2922 if (!skb) { 2923 sprintf(pkt_dev->result, "No memory"); 2924 return NULL; 2925 } 2926 2927 skb_reserve(skb, 16); 2928 2929 /* Reserve for ethernet and IP header */ 2930 eth = (__u8 *) skb_push(skb, 14); 2931 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2932 if (pkt_dev->nr_labels) 2933 mpls_push(mpls, pkt_dev); 2934 2935 if (pkt_dev->vlan_id != 0xffff) { 2936 if (pkt_dev->svlan_id != 0xffff) { 2937 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2938 *svlan_tci = build_tci(pkt_dev->svlan_id, 2939 pkt_dev->svlan_cfi, 2940 pkt_dev->svlan_p); 2941 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2942 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2943 } 2944 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2945 *vlan_tci = build_tci(pkt_dev->vlan_id, 2946 pkt_dev->vlan_cfi, 2947 pkt_dev->vlan_p); 2948 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2949 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 2950 } 2951 2952 skb->network_header = skb->tail; 2953 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr); 2954 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr)); 2955 skb_set_queue_mapping(skb, queue_map); 2956 iph = ipv6_hdr(skb); 2957 udph = udp_hdr(skb); 2958 2959 memcpy(eth, pkt_dev->hh, 12); 2960 *(__be16 *) ð[12] = protocol; 2961 2962 /* Eth + IPh + UDPh + mpls */ 2963 datalen = pkt_dev->cur_pkt_size - 14 - 2964 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 2965 pkt_dev->pkt_overhead; 2966 2967 if (datalen < sizeof(struct pktgen_hdr)) { 2968 datalen = sizeof(struct pktgen_hdr); 2969 if (net_ratelimit()) 2970 printk(KERN_INFO "pktgen: increased datalen to %d\n", 2971 datalen); 2972 } 2973 2974 udph->source = htons(pkt_dev->cur_udp_src); 2975 udph->dest = htons(pkt_dev->cur_udp_dst); 2976 udph->len = htons(datalen + sizeof(struct udphdr)); 2977 udph->check = 0; /* No checksum */ 2978 2979 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 2980 2981 if (pkt_dev->traffic_class) { 2982 /* Version + traffic class + flow (0) */ 2983 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 2984 } 2985 2986 iph->hop_limit = 32; 2987 2988 iph->payload_len = htons(sizeof(struct udphdr) + datalen); 2989 iph->nexthdr = IPPROTO_UDP; 2990 2991 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr); 2992 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr); 2993 2994 skb->mac_header = (skb->network_header - ETH_HLEN - 2995 pkt_dev->pkt_overhead); 2996 skb->protocol = protocol; 2997 skb->dev = odev; 2998 skb->pkt_type = PACKET_HOST; 2999 3000 if (pkt_dev->nfrags <= 0) 3001 pgh = (struct pktgen_hdr *)skb_put(skb, datalen); 3002 else { 3003 int frags = pkt_dev->nfrags; 3004 int i; 3005 3006 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8); 3007 3008 if (frags > MAX_SKB_FRAGS) 3009 frags = MAX_SKB_FRAGS; 3010 if (datalen > frags * PAGE_SIZE) { 3011 skb_put(skb, datalen - frags * PAGE_SIZE); 3012 datalen = frags * PAGE_SIZE; 3013 } 3014 3015 i = 0; 3016 while (datalen > 0) { 3017 struct page *page = alloc_pages(GFP_KERNEL, 0); 3018 skb_shinfo(skb)->frags[i].page = page; 3019 skb_shinfo(skb)->frags[i].page_offset = 0; 3020 skb_shinfo(skb)->frags[i].size = 3021 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 3022 datalen -= skb_shinfo(skb)->frags[i].size; 3023 skb->len += skb_shinfo(skb)->frags[i].size; 3024 skb->data_len += skb_shinfo(skb)->frags[i].size; 3025 i++; 3026 skb_shinfo(skb)->nr_frags = i; 3027 } 3028 3029 while (i < frags) { 3030 int rem; 3031 3032 if (i == 0) 3033 break; 3034 3035 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 3036 if (rem == 0) 3037 break; 3038 3039 skb_shinfo(skb)->frags[i - 1].size -= rem; 3040 3041 skb_shinfo(skb)->frags[i] = 3042 skb_shinfo(skb)->frags[i - 1]; 3043 get_page(skb_shinfo(skb)->frags[i].page); 3044 skb_shinfo(skb)->frags[i].page = 3045 skb_shinfo(skb)->frags[i - 1].page; 3046 skb_shinfo(skb)->frags[i].page_offset += 3047 skb_shinfo(skb)->frags[i - 1].size; 3048 skb_shinfo(skb)->frags[i].size = rem; 3049 i++; 3050 skb_shinfo(skb)->nr_frags = i; 3051 } 3052 } 3053 3054 /* Stamp the time, and sequence number, 3055 * convert them to network byte order 3056 * should we update cloned packets too ? 3057 */ 3058 if (pgh) { 3059 struct timeval timestamp; 3060 3061 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 3062 pgh->seq_num = htonl(pkt_dev->seq_num); 3063 3064 do_gettimeofday(×tamp); 3065 pgh->tv_sec = htonl(timestamp.tv_sec); 3066 pgh->tv_usec = htonl(timestamp.tv_usec); 3067 } 3068 /* pkt_dev->seq_num++; FF: you really mean this? */ 3069 3070 return skb; 3071 } 3072 3073 static struct sk_buff *fill_packet(struct net_device *odev, 3074 struct pktgen_dev *pkt_dev) 3075 { 3076 if (pkt_dev->flags & F_IPV6) 3077 return fill_packet_ipv6(odev, pkt_dev); 3078 else 3079 return fill_packet_ipv4(odev, pkt_dev); 3080 } 3081 3082 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 3083 { 3084 pkt_dev->seq_num = 1; 3085 pkt_dev->idle_acc = 0; 3086 pkt_dev->sofar = 0; 3087 pkt_dev->tx_bytes = 0; 3088 pkt_dev->errors = 0; 3089 } 3090 3091 /* Set up structure for sending pkts, clear counters */ 3092 3093 static void pktgen_run(struct pktgen_thread *t) 3094 { 3095 struct pktgen_dev *pkt_dev; 3096 int started = 0; 3097 3098 pr_debug("pktgen: entering pktgen_run. %p\n", t); 3099 3100 if_lock(t); 3101 list_for_each_entry(pkt_dev, &t->if_list, list) { 3102 3103 /* 3104 * setup odev and create initial packet. 3105 */ 3106 pktgen_setup_inject(pkt_dev); 3107 3108 if (pkt_dev->odev) { 3109 pktgen_clear_counters(pkt_dev); 3110 pkt_dev->running = 1; /* Cranke yeself! */ 3111 pkt_dev->skb = NULL; 3112 pkt_dev->started_at = 3113 pkt_dev->next_tx = ktime_now(); 3114 3115 set_pkt_overhead(pkt_dev); 3116 3117 strcpy(pkt_dev->result, "Starting"); 3118 started++; 3119 } else 3120 strcpy(pkt_dev->result, "Error starting"); 3121 } 3122 if_unlock(t); 3123 if (started) 3124 t->control &= ~(T_STOP); 3125 } 3126 3127 static void pktgen_stop_all_threads_ifs(void) 3128 { 3129 struct pktgen_thread *t; 3130 3131 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n"); 3132 3133 mutex_lock(&pktgen_thread_lock); 3134 3135 list_for_each_entry(t, &pktgen_threads, th_list) 3136 t->control |= T_STOP; 3137 3138 mutex_unlock(&pktgen_thread_lock); 3139 } 3140 3141 static int thread_is_running(const struct pktgen_thread *t) 3142 { 3143 const struct pktgen_dev *pkt_dev; 3144 3145 list_for_each_entry(pkt_dev, &t->if_list, list) 3146 if (pkt_dev->running) 3147 return 1; 3148 return 0; 3149 } 3150 3151 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3152 { 3153 if_lock(t); 3154 3155 while (thread_is_running(t)) { 3156 3157 if_unlock(t); 3158 3159 msleep_interruptible(100); 3160 3161 if (signal_pending(current)) 3162 goto signal; 3163 if_lock(t); 3164 } 3165 if_unlock(t); 3166 return 1; 3167 signal: 3168 return 0; 3169 } 3170 3171 static int pktgen_wait_all_threads_run(void) 3172 { 3173 struct pktgen_thread *t; 3174 int sig = 1; 3175 3176 mutex_lock(&pktgen_thread_lock); 3177 3178 list_for_each_entry(t, &pktgen_threads, th_list) { 3179 sig = pktgen_wait_thread_run(t); 3180 if (sig == 0) 3181 break; 3182 } 3183 3184 if (sig == 0) 3185 list_for_each_entry(t, &pktgen_threads, th_list) 3186 t->control |= (T_STOP); 3187 3188 mutex_unlock(&pktgen_thread_lock); 3189 return sig; 3190 } 3191 3192 static void pktgen_run_all_threads(void) 3193 { 3194 struct pktgen_thread *t; 3195 3196 pr_debug("pktgen: entering pktgen_run_all_threads.\n"); 3197 3198 mutex_lock(&pktgen_thread_lock); 3199 3200 list_for_each_entry(t, &pktgen_threads, th_list) 3201 t->control |= (T_RUN); 3202 3203 mutex_unlock(&pktgen_thread_lock); 3204 3205 /* Propagate thread->control */ 3206 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3207 3208 pktgen_wait_all_threads_run(); 3209 } 3210 3211 static void pktgen_reset_all_threads(void) 3212 { 3213 struct pktgen_thread *t; 3214 3215 pr_debug("pktgen: entering pktgen_reset_all_threads.\n"); 3216 3217 mutex_lock(&pktgen_thread_lock); 3218 3219 list_for_each_entry(t, &pktgen_threads, th_list) 3220 t->control |= (T_REMDEVALL); 3221 3222 mutex_unlock(&pktgen_thread_lock); 3223 3224 /* Propagate thread->control */ 3225 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3226 3227 pktgen_wait_all_threads_run(); 3228 } 3229 3230 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3231 { 3232 __u64 bps, mbps, pps; 3233 char *p = pkt_dev->result; 3234 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3235 pkt_dev->started_at); 3236 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3237 3238 p += sprintf(p, "OK: %llu(c%llu+d%llu) nsec, %llu (%dbyte,%dfrags)\n", 3239 (unsigned long long)ktime_to_us(elapsed), 3240 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3241 (unsigned long long)ktime_to_us(idle), 3242 (unsigned long long)pkt_dev->sofar, 3243 pkt_dev->cur_pkt_size, nr_frags); 3244 3245 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3246 ktime_to_ns(elapsed)); 3247 3248 bps = pps * 8 * pkt_dev->cur_pkt_size; 3249 3250 mbps = bps; 3251 do_div(mbps, 1000000); 3252 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3253 (unsigned long long)pps, 3254 (unsigned long long)mbps, 3255 (unsigned long long)bps, 3256 (unsigned long long)pkt_dev->errors); 3257 } 3258 3259 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3260 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3261 { 3262 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3263 3264 if (!pkt_dev->running) { 3265 printk(KERN_WARNING "pktgen: interface: %s is already " 3266 "stopped\n", pkt_dev->odevname); 3267 return -EINVAL; 3268 } 3269 3270 kfree_skb(pkt_dev->skb); 3271 pkt_dev->skb = NULL; 3272 pkt_dev->stopped_at = ktime_now(); 3273 pkt_dev->running = 0; 3274 3275 show_results(pkt_dev, nr_frags); 3276 3277 return 0; 3278 } 3279 3280 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3281 { 3282 struct pktgen_dev *pkt_dev, *best = NULL; 3283 3284 if_lock(t); 3285 3286 list_for_each_entry(pkt_dev, &t->if_list, list) { 3287 if (!pkt_dev->running) 3288 continue; 3289 if (best == NULL) 3290 best = pkt_dev; 3291 else if (ktime_lt(pkt_dev->next_tx, best->next_tx)) 3292 best = pkt_dev; 3293 } 3294 if_unlock(t); 3295 return best; 3296 } 3297 3298 static void pktgen_stop(struct pktgen_thread *t) 3299 { 3300 struct pktgen_dev *pkt_dev; 3301 3302 pr_debug("pktgen: entering pktgen_stop\n"); 3303 3304 if_lock(t); 3305 3306 list_for_each_entry(pkt_dev, &t->if_list, list) { 3307 pktgen_stop_device(pkt_dev); 3308 } 3309 3310 if_unlock(t); 3311 } 3312 3313 /* 3314 * one of our devices needs to be removed - find it 3315 * and remove it 3316 */ 3317 static void pktgen_rem_one_if(struct pktgen_thread *t) 3318 { 3319 struct list_head *q, *n; 3320 struct pktgen_dev *cur; 3321 3322 pr_debug("pktgen: entering pktgen_rem_one_if\n"); 3323 3324 if_lock(t); 3325 3326 list_for_each_safe(q, n, &t->if_list) { 3327 cur = list_entry(q, struct pktgen_dev, list); 3328 3329 if (!cur->removal_mark) 3330 continue; 3331 3332 kfree_skb(cur->skb); 3333 cur->skb = NULL; 3334 3335 pktgen_remove_device(t, cur); 3336 3337 break; 3338 } 3339 3340 if_unlock(t); 3341 } 3342 3343 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3344 { 3345 struct list_head *q, *n; 3346 struct pktgen_dev *cur; 3347 3348 /* Remove all devices, free mem */ 3349 3350 pr_debug("pktgen: entering pktgen_rem_all_ifs\n"); 3351 if_lock(t); 3352 3353 list_for_each_safe(q, n, &t->if_list) { 3354 cur = list_entry(q, struct pktgen_dev, list); 3355 3356 kfree_skb(cur->skb); 3357 cur->skb = NULL; 3358 3359 pktgen_remove_device(t, cur); 3360 } 3361 3362 if_unlock(t); 3363 } 3364 3365 static void pktgen_rem_thread(struct pktgen_thread *t) 3366 { 3367 /* Remove from the thread list */ 3368 3369 remove_proc_entry(t->tsk->comm, pg_proc_dir); 3370 3371 mutex_lock(&pktgen_thread_lock); 3372 3373 list_del(&t->th_list); 3374 3375 mutex_unlock(&pktgen_thread_lock); 3376 } 3377 3378 static void pktgen_resched(struct pktgen_dev *pkt_dev) 3379 { 3380 ktime_t idle_start = ktime_now(); 3381 schedule(); 3382 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3383 } 3384 3385 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) 3386 { 3387 ktime_t idle_start = ktime_now(); 3388 3389 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3390 if (signal_pending(current)) 3391 break; 3392 3393 if (need_resched()) 3394 pktgen_resched(pkt_dev); 3395 else 3396 cpu_relax(); 3397 } 3398 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3399 } 3400 3401 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3402 { 3403 struct net_device *odev = pkt_dev->odev; 3404 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *) 3405 = odev->netdev_ops->ndo_start_xmit; 3406 struct netdev_queue *txq; 3407 u16 queue_map; 3408 int ret; 3409 3410 /* If device is offline, then don't send */ 3411 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { 3412 pktgen_stop_device(pkt_dev); 3413 return; 3414 } 3415 3416 /* This is max DELAY, this has special meaning of 3417 * "never transmit" 3418 */ 3419 if (unlikely(pkt_dev->delay == ULLONG_MAX)) { 3420 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX); 3421 return; 3422 } 3423 3424 /* If no skb or clone count exhausted then get new one */ 3425 if (!pkt_dev->skb || (pkt_dev->last_ok && 3426 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { 3427 /* build a new pkt */ 3428 kfree_skb(pkt_dev->skb); 3429 3430 pkt_dev->skb = fill_packet(odev, pkt_dev); 3431 if (pkt_dev->skb == NULL) { 3432 printk(KERN_ERR "pktgen: ERROR: couldn't " 3433 "allocate skb in fill_packet.\n"); 3434 schedule(); 3435 pkt_dev->clone_count--; /* back out increment, OOM */ 3436 return; 3437 } 3438 pkt_dev->last_pkt_size = pkt_dev->skb->len; 3439 pkt_dev->allocated_skbs++; 3440 pkt_dev->clone_count = 0; /* reset counter */ 3441 } 3442 3443 if (pkt_dev->delay && pkt_dev->last_ok) 3444 spin(pkt_dev, pkt_dev->next_tx); 3445 3446 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3447 txq = netdev_get_tx_queue(odev, queue_map); 3448 3449 __netif_tx_lock_bh(txq); 3450 3451 if (unlikely(netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq))) { 3452 ret = NETDEV_TX_BUSY; 3453 pkt_dev->last_ok = 0; 3454 goto unlock; 3455 } 3456 atomic_inc(&(pkt_dev->skb->users)); 3457 ret = (*xmit)(pkt_dev->skb, odev); 3458 3459 switch (ret) { 3460 case NETDEV_TX_OK: 3461 txq_trans_update(txq); 3462 pkt_dev->last_ok = 1; 3463 pkt_dev->sofar++; 3464 pkt_dev->seq_num++; 3465 pkt_dev->tx_bytes += pkt_dev->last_pkt_size; 3466 break; 3467 case NET_XMIT_DROP: 3468 case NET_XMIT_CN: 3469 case NET_XMIT_POLICED: 3470 /* skb has been consumed */ 3471 pkt_dev->errors++; 3472 break; 3473 default: /* Drivers are not supposed to return other values! */ 3474 if (net_ratelimit()) 3475 pr_info("pktgen: %s xmit error: %d\n", 3476 pkt_dev->odevname, ret); 3477 pkt_dev->errors++; 3478 /* fallthru */ 3479 case NETDEV_TX_LOCKED: 3480 case NETDEV_TX_BUSY: 3481 /* Retry it next time */ 3482 atomic_dec(&(pkt_dev->skb->users)); 3483 pkt_dev->last_ok = 0; 3484 } 3485 unlock: 3486 __netif_tx_unlock_bh(txq); 3487 3488 /* If pkt_dev->count is zero, then run forever */ 3489 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3490 pktgen_wait_for_skb(pkt_dev); 3491 3492 /* Done with this */ 3493 pktgen_stop_device(pkt_dev); 3494 } 3495 } 3496 3497 /* 3498 * Main loop of the thread goes here 3499 */ 3500 3501 static int pktgen_thread_worker(void *arg) 3502 { 3503 DEFINE_WAIT(wait); 3504 struct pktgen_thread *t = arg; 3505 struct pktgen_dev *pkt_dev = NULL; 3506 int cpu = t->cpu; 3507 3508 BUG_ON(smp_processor_id() != cpu); 3509 3510 init_waitqueue_head(&t->queue); 3511 complete(&t->start_done); 3512 3513 pr_debug("pktgen: starting pktgen/%d: pid=%d\n", 3514 cpu, task_pid_nr(current)); 3515 3516 set_current_state(TASK_INTERRUPTIBLE); 3517 3518 set_freezable(); 3519 3520 while (!kthread_should_stop()) { 3521 pkt_dev = next_to_run(t); 3522 3523 if (unlikely(!pkt_dev && t->control == 0)) { 3524 wait_event_interruptible_timeout(t->queue, 3525 t->control != 0, 3526 HZ/10); 3527 try_to_freeze(); 3528 continue; 3529 } 3530 3531 __set_current_state(TASK_RUNNING); 3532 3533 if (likely(pkt_dev)) { 3534 pktgen_xmit(pkt_dev); 3535 3536 if (need_resched()) 3537 pktgen_resched(pkt_dev); 3538 else 3539 cpu_relax(); 3540 } 3541 3542 if (t->control & T_STOP) { 3543 pktgen_stop(t); 3544 t->control &= ~(T_STOP); 3545 } 3546 3547 if (t->control & T_RUN) { 3548 pktgen_run(t); 3549 t->control &= ~(T_RUN); 3550 } 3551 3552 if (t->control & T_REMDEVALL) { 3553 pktgen_rem_all_ifs(t); 3554 t->control &= ~(T_REMDEVALL); 3555 } 3556 3557 if (t->control & T_REMDEV) { 3558 pktgen_rem_one_if(t); 3559 t->control &= ~(T_REMDEV); 3560 } 3561 3562 try_to_freeze(); 3563 3564 set_current_state(TASK_INTERRUPTIBLE); 3565 } 3566 3567 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm); 3568 pktgen_stop(t); 3569 3570 pr_debug("pktgen: %s removing all device\n", t->tsk->comm); 3571 pktgen_rem_all_ifs(t); 3572 3573 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm); 3574 pktgen_rem_thread(t); 3575 3576 return 0; 3577 } 3578 3579 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3580 const char *ifname, bool exact) 3581 { 3582 struct pktgen_dev *p, *pkt_dev = NULL; 3583 size_t len = strlen(ifname); 3584 3585 if_lock(t); 3586 list_for_each_entry(p, &t->if_list, list) 3587 if (strncmp(p->odevname, ifname, len) == 0) { 3588 if (p->odevname[len]) { 3589 if (exact || p->odevname[len] != '@') 3590 continue; 3591 } 3592 pkt_dev = p; 3593 break; 3594 } 3595 3596 if_unlock(t); 3597 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev); 3598 return pkt_dev; 3599 } 3600 3601 /* 3602 * Adds a dev at front of if_list. 3603 */ 3604 3605 static int add_dev_to_thread(struct pktgen_thread *t, 3606 struct pktgen_dev *pkt_dev) 3607 { 3608 int rv = 0; 3609 3610 if_lock(t); 3611 3612 if (pkt_dev->pg_thread) { 3613 printk(KERN_ERR "pktgen: ERROR: already assigned " 3614 "to a thread.\n"); 3615 rv = -EBUSY; 3616 goto out; 3617 } 3618 3619 list_add(&pkt_dev->list, &t->if_list); 3620 pkt_dev->pg_thread = t; 3621 pkt_dev->running = 0; 3622 3623 out: 3624 if_unlock(t); 3625 return rv; 3626 } 3627 3628 /* Called under thread lock */ 3629 3630 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3631 { 3632 struct pktgen_dev *pkt_dev; 3633 int err; 3634 int node = cpu_to_node(t->cpu); 3635 3636 /* We don't allow a device to be on several threads */ 3637 3638 pkt_dev = __pktgen_NN_threads(ifname, FIND); 3639 if (pkt_dev) { 3640 printk(KERN_ERR "pktgen: ERROR: interface already used.\n"); 3641 return -EBUSY; 3642 } 3643 3644 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); 3645 if (!pkt_dev) 3646 return -ENOMEM; 3647 3648 strcpy(pkt_dev->odevname, ifname); 3649 pkt_dev->flows = vmalloc_node(MAX_CFLOWS * sizeof(struct flow_state), 3650 node); 3651 if (pkt_dev->flows == NULL) { 3652 kfree(pkt_dev); 3653 return -ENOMEM; 3654 } 3655 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state)); 3656 3657 pkt_dev->removal_mark = 0; 3658 pkt_dev->min_pkt_size = ETH_ZLEN; 3659 pkt_dev->max_pkt_size = ETH_ZLEN; 3660 pkt_dev->nfrags = 0; 3661 pkt_dev->clone_skb = pg_clone_skb_d; 3662 pkt_dev->delay = pg_delay_d; 3663 pkt_dev->count = pg_count_d; 3664 pkt_dev->sofar = 0; 3665 pkt_dev->udp_src_min = 9; /* sink port */ 3666 pkt_dev->udp_src_max = 9; 3667 pkt_dev->udp_dst_min = 9; 3668 pkt_dev->udp_dst_max = 9; 3669 3670 pkt_dev->vlan_p = 0; 3671 pkt_dev->vlan_cfi = 0; 3672 pkt_dev->vlan_id = 0xffff; 3673 pkt_dev->svlan_p = 0; 3674 pkt_dev->svlan_cfi = 0; 3675 pkt_dev->svlan_id = 0xffff; 3676 3677 err = pktgen_setup_dev(pkt_dev, ifname); 3678 if (err) 3679 goto out1; 3680 3681 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir, 3682 &pktgen_if_fops, pkt_dev); 3683 if (!pkt_dev->entry) { 3684 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n", 3685 PG_PROC_DIR, ifname); 3686 err = -EINVAL; 3687 goto out2; 3688 } 3689 #ifdef CONFIG_XFRM 3690 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3691 pkt_dev->ipsproto = IPPROTO_ESP; 3692 #endif 3693 3694 return add_dev_to_thread(t, pkt_dev); 3695 out2: 3696 dev_put(pkt_dev->odev); 3697 out1: 3698 #ifdef CONFIG_XFRM 3699 free_SAs(pkt_dev); 3700 #endif 3701 vfree(pkt_dev->flows); 3702 kfree(pkt_dev); 3703 return err; 3704 } 3705 3706 static int __init pktgen_create_thread(int cpu) 3707 { 3708 struct pktgen_thread *t; 3709 struct proc_dir_entry *pe; 3710 struct task_struct *p; 3711 3712 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL, 3713 cpu_to_node(cpu)); 3714 if (!t) { 3715 printk(KERN_ERR "pktgen: ERROR: out of memory, can't " 3716 "create new thread.\n"); 3717 return -ENOMEM; 3718 } 3719 3720 spin_lock_init(&t->if_lock); 3721 t->cpu = cpu; 3722 3723 INIT_LIST_HEAD(&t->if_list); 3724 3725 list_add_tail(&t->th_list, &pktgen_threads); 3726 init_completion(&t->start_done); 3727 3728 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu); 3729 if (IS_ERR(p)) { 3730 printk(KERN_ERR "pktgen: kernel_thread() failed " 3731 "for cpu %d\n", t->cpu); 3732 list_del(&t->th_list); 3733 kfree(t); 3734 return PTR_ERR(p); 3735 } 3736 kthread_bind(p, cpu); 3737 t->tsk = p; 3738 3739 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir, 3740 &pktgen_thread_fops, t); 3741 if (!pe) { 3742 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n", 3743 PG_PROC_DIR, t->tsk->comm); 3744 kthread_stop(p); 3745 list_del(&t->th_list); 3746 kfree(t); 3747 return -EINVAL; 3748 } 3749 3750 wake_up_process(p); 3751 wait_for_completion(&t->start_done); 3752 3753 return 0; 3754 } 3755 3756 /* 3757 * Removes a device from the thread if_list. 3758 */ 3759 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3760 struct pktgen_dev *pkt_dev) 3761 { 3762 struct list_head *q, *n; 3763 struct pktgen_dev *p; 3764 3765 list_for_each_safe(q, n, &t->if_list) { 3766 p = list_entry(q, struct pktgen_dev, list); 3767 if (p == pkt_dev) 3768 list_del(&p->list); 3769 } 3770 } 3771 3772 static int pktgen_remove_device(struct pktgen_thread *t, 3773 struct pktgen_dev *pkt_dev) 3774 { 3775 3776 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev); 3777 3778 if (pkt_dev->running) { 3779 printk(KERN_WARNING "pktgen: WARNING: trying to remove a " 3780 "running interface, stopping it now.\n"); 3781 pktgen_stop_device(pkt_dev); 3782 } 3783 3784 /* Dis-associate from the interface */ 3785 3786 if (pkt_dev->odev) { 3787 dev_put(pkt_dev->odev); 3788 pkt_dev->odev = NULL; 3789 } 3790 3791 /* And update the thread if_list */ 3792 3793 _rem_dev_from_if_list(t, pkt_dev); 3794 3795 if (pkt_dev->entry) 3796 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 3797 3798 #ifdef CONFIG_XFRM 3799 free_SAs(pkt_dev); 3800 #endif 3801 vfree(pkt_dev->flows); 3802 kfree(pkt_dev); 3803 return 0; 3804 } 3805 3806 static int __init pg_init(void) 3807 { 3808 int cpu; 3809 struct proc_dir_entry *pe; 3810 3811 printk(KERN_INFO "%s", version); 3812 3813 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net); 3814 if (!pg_proc_dir) 3815 return -ENODEV; 3816 3817 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops); 3818 if (pe == NULL) { 3819 printk(KERN_ERR "pktgen: ERROR: cannot create %s " 3820 "procfs entry.\n", PGCTRL); 3821 proc_net_remove(&init_net, PG_PROC_DIR); 3822 return -EINVAL; 3823 } 3824 3825 /* Register us to receive netdevice events */ 3826 register_netdevice_notifier(&pktgen_notifier_block); 3827 3828 for_each_online_cpu(cpu) { 3829 int err; 3830 3831 err = pktgen_create_thread(cpu); 3832 if (err) 3833 printk(KERN_WARNING "pktgen: WARNING: Cannot create " 3834 "thread for cpu %d (%d)\n", cpu, err); 3835 } 3836 3837 if (list_empty(&pktgen_threads)) { 3838 printk(KERN_ERR "pktgen: ERROR: Initialization failed for " 3839 "all threads\n"); 3840 unregister_netdevice_notifier(&pktgen_notifier_block); 3841 remove_proc_entry(PGCTRL, pg_proc_dir); 3842 proc_net_remove(&init_net, PG_PROC_DIR); 3843 return -ENODEV; 3844 } 3845 3846 return 0; 3847 } 3848 3849 static void __exit pg_cleanup(void) 3850 { 3851 struct pktgen_thread *t; 3852 struct list_head *q, *n; 3853 wait_queue_head_t queue; 3854 init_waitqueue_head(&queue); 3855 3856 /* Stop all interfaces & threads */ 3857 3858 list_for_each_safe(q, n, &pktgen_threads) { 3859 t = list_entry(q, struct pktgen_thread, th_list); 3860 kthread_stop(t->tsk); 3861 kfree(t); 3862 } 3863 3864 /* Un-register us from receiving netdevice events */ 3865 unregister_netdevice_notifier(&pktgen_notifier_block); 3866 3867 /* Clean up proc file system */ 3868 remove_proc_entry(PGCTRL, pg_proc_dir); 3869 proc_net_remove(&init_net, PG_PROC_DIR); 3870 } 3871 3872 module_init(pg_init); 3873 module_exit(pg_cleanup); 3874 3875 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); 3876 MODULE_DESCRIPTION("Packet Generator tool"); 3877 MODULE_LICENSE("GPL"); 3878 MODULE_VERSION(VERSION); 3879 module_param(pg_count_d, int, 0); 3880 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); 3881 module_param(pg_delay_d, int, 0); 3882 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); 3883 module_param(pg_clone_skb_d, int, 0); 3884 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); 3885 module_param(debug, int, 0); 3886 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); 3887