1 /* 2 * Authors: 3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se> 4 * Uppsala University and 5 * Swedish University of Agricultural Sciences 6 * 7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> 8 * Ben Greear <greearb@candelatech.com> 9 * Jens Låås <jens.laas@data.slu.se> 10 * 11 * This program is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License 13 * as published by the Free Software Foundation; either version 14 * 2 of the License, or (at your option) any later version. 15 * 16 * 17 * A tool for loading the network with preconfigurated packets. 18 * The tool is implemented as a linux module. Parameters are output 19 * device, delay (to hard_xmit), number of packets, and whether 20 * to use multiple SKBs or just the same one. 21 * pktgen uses the installed interface's output routine. 22 * 23 * Additional hacking by: 24 * 25 * Jens.Laas@data.slu.se 26 * Improved by ANK. 010120. 27 * Improved by ANK even more. 010212. 28 * MAC address typo fixed. 010417 --ro 29 * Integrated. 020301 --DaveM 30 * Added multiskb option 020301 --DaveM 31 * Scaling of results. 020417--sigurdur@linpro.no 32 * Significant re-work of the module: 33 * * Convert to threaded model to more efficiently be able to transmit 34 * and receive on multiple interfaces at once. 35 * * Converted many counters to __u64 to allow longer runs. 36 * * Allow configuration of ranges, like min/max IP address, MACs, 37 * and UDP-ports, for both source and destination, and can 38 * set to use a random distribution or sequentially walk the range. 39 * * Can now change most values after starting. 40 * * Place 12-byte packet in UDP payload with magic number, 41 * sequence number, and timestamp. 42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and 43 * latencies (with micro-second) precision. 44 * * Add IOCTL interface to easily get counters & configuration. 45 * --Ben Greear <greearb@candelatech.com> 46 * 47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct 48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0 49 * as a "fastpath" with a configurable number of clones after alloc's. 50 * clone_skb=0 means all packets are allocated this also means ranges time 51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100 52 * clones. 53 * 54 * Also moved to /proc/net/pktgen/ 55 * --ro 56 * 57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever 58 * mistakes. Also merged in DaveM's patch in the -pre6 patch. 59 * --Ben Greear <greearb@candelatech.com> 60 * 61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br) 62 * 63 * 64 * 021124 Finished major redesign and rewrite for new functionality. 65 * See Documentation/networking/pktgen.txt for how to use this. 66 * 67 * The new operation: 68 * For each CPU one thread/process is created at start. This process checks 69 * for running devices in the if_list and sends packets until count is 0 it 70 * also the thread checks the thread->control which is used for inter-process 71 * communication. controlling process "posts" operations to the threads this 72 * way. The if_lock should be possible to remove when add/rem_device is merged 73 * into this too. 74 * 75 * By design there should only be *one* "controlling" process. In practice 76 * multiple write accesses gives unpredictable result. Understood by "write" 77 * to /proc gives result code thats should be read be the "writer". 78 * For practical use this should be no problem. 79 * 80 * Note when adding devices to a specific CPU there good idea to also assign 81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU. 82 * --ro 83 * 84 * Fix refcount off by one if first packet fails, potential null deref, 85 * memleak 030710- KJP 86 * 87 * First "ranges" functionality for ipv6 030726 --ro 88 * 89 * Included flow support. 030802 ANK. 90 * 91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org> 92 * 93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419 94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604 95 * 96 * New xmit() return, do_div and misc clean up by Stephen Hemminger 97 * <shemminger@osdl.org> 040923 98 * 99 * Randy Dunlap fixed u64 printk compiler waring 100 * 101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org> 102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213 103 * 104 * Corrections from Nikolai Malykh (nmalykh@bilim.com) 105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230 106 * 107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com> 108 * 050103 109 * 110 * MPLS support by Steven Whitehouse <steve@chygwyn.com> 111 * 112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com> 113 * 114 * Fixed src_mac command to set source mac of packet to value specified in 115 * command by Adit Ranadive <adit.262@gmail.com> 116 * 117 */ 118 119 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 120 121 #include <linux/sys.h> 122 #include <linux/types.h> 123 #include <linux/module.h> 124 #include <linux/moduleparam.h> 125 #include <linux/kernel.h> 126 #include <linux/mutex.h> 127 #include <linux/sched.h> 128 #include <linux/slab.h> 129 #include <linux/vmalloc.h> 130 #include <linux/unistd.h> 131 #include <linux/string.h> 132 #include <linux/ptrace.h> 133 #include <linux/errno.h> 134 #include <linux/ioport.h> 135 #include <linux/interrupt.h> 136 #include <linux/capability.h> 137 #include <linux/hrtimer.h> 138 #include <linux/freezer.h> 139 #include <linux/delay.h> 140 #include <linux/timer.h> 141 #include <linux/list.h> 142 #include <linux/init.h> 143 #include <linux/skbuff.h> 144 #include <linux/netdevice.h> 145 #include <linux/inet.h> 146 #include <linux/inetdevice.h> 147 #include <linux/rtnetlink.h> 148 #include <linux/if_arp.h> 149 #include <linux/if_vlan.h> 150 #include <linux/in.h> 151 #include <linux/ip.h> 152 #include <linux/ipv6.h> 153 #include <linux/udp.h> 154 #include <linux/proc_fs.h> 155 #include <linux/seq_file.h> 156 #include <linux/wait.h> 157 #include <linux/etherdevice.h> 158 #include <linux/kthread.h> 159 #include <net/net_namespace.h> 160 #include <net/checksum.h> 161 #include <net/ipv6.h> 162 #include <net/addrconf.h> 163 #ifdef CONFIG_XFRM 164 #include <net/xfrm.h> 165 #endif 166 #include <asm/byteorder.h> 167 #include <linux/rcupdate.h> 168 #include <linux/bitops.h> 169 #include <linux/io.h> 170 #include <linux/timex.h> 171 #include <linux/uaccess.h> 172 #include <asm/dma.h> 173 #include <asm/div64.h> /* do_div */ 174 175 #define VERSION "2.74" 176 #define IP_NAME_SZ 32 177 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */ 178 #define MPLS_STACK_BOTTOM htonl(0x00000100) 179 180 #define func_enter() pr_debug("entering %s\n", __func__); 181 182 /* Device flag bits */ 183 #define F_IPSRC_RND (1<<0) /* IP-Src Random */ 184 #define F_IPDST_RND (1<<1) /* IP-Dst Random */ 185 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */ 186 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */ 187 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */ 188 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */ 189 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */ 190 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */ 191 #define F_MPLS_RND (1<<8) /* Random MPLS labels */ 192 #define F_VID_RND (1<<9) /* Random VLAN ID */ 193 #define F_SVID_RND (1<<10) /* Random SVLAN ID */ 194 #define F_FLOW_SEQ (1<<11) /* Sequential flows */ 195 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */ 196 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */ 197 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */ 198 #define F_NODE (1<<15) /* Node memory alloc*/ 199 200 /* Thread control flag bits */ 201 #define T_STOP (1<<0) /* Stop run */ 202 #define T_RUN (1<<1) /* Start run */ 203 #define T_REMDEVALL (1<<2) /* Remove all devs */ 204 #define T_REMDEV (1<<3) /* Remove one dev */ 205 206 /* If lock -- can be removed after some work */ 207 #define if_lock(t) spin_lock(&(t->if_lock)); 208 #define if_unlock(t) spin_unlock(&(t->if_lock)); 209 210 /* Used to help with determining the pkts on receive */ 211 #define PKTGEN_MAGIC 0xbe9be955 212 #define PG_PROC_DIR "pktgen" 213 #define PGCTRL "pgctrl" 214 static struct proc_dir_entry *pg_proc_dir; 215 216 #define MAX_CFLOWS 65536 217 218 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4) 219 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4) 220 221 struct flow_state { 222 __be32 cur_daddr; 223 int count; 224 #ifdef CONFIG_XFRM 225 struct xfrm_state *x; 226 #endif 227 __u32 flags; 228 }; 229 230 /* flow flag bits */ 231 #define F_INIT (1<<0) /* flow has been initialized */ 232 233 struct pktgen_dev { 234 /* 235 * Try to keep frequent/infrequent used vars. separated. 236 */ 237 struct proc_dir_entry *entry; /* proc file */ 238 struct pktgen_thread *pg_thread;/* the owner */ 239 struct list_head list; /* chaining in the thread's run-queue */ 240 241 int running; /* if false, the test will stop */ 242 243 /* If min != max, then we will either do a linear iteration, or 244 * we will do a random selection from within the range. 245 */ 246 __u32 flags; 247 int removal_mark; /* non-zero => the device is marked for 248 * removal by worker thread */ 249 250 int min_pkt_size; /* = ETH_ZLEN; */ 251 int max_pkt_size; /* = ETH_ZLEN; */ 252 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */ 253 int nfrags; 254 struct page *page; 255 u64 delay; /* nano-seconds */ 256 257 __u64 count; /* Default No packets to send */ 258 __u64 sofar; /* How many pkts we've sent so far */ 259 __u64 tx_bytes; /* How many bytes we've transmitted */ 260 __u64 errors; /* Errors when trying to transmit, */ 261 262 /* runtime counters relating to clone_skb */ 263 264 __u64 allocated_skbs; 265 __u32 clone_count; 266 int last_ok; /* Was last skb sent? 267 * Or a failed transmit of some sort? 268 * This will keep sequence numbers in order 269 */ 270 ktime_t next_tx; 271 ktime_t started_at; 272 ktime_t stopped_at; 273 u64 idle_acc; /* nano-seconds */ 274 275 __u32 seq_num; 276 277 int clone_skb; /* 278 * Use multiple SKBs during packet gen. 279 * If this number is greater than 1, then 280 * that many copies of the same packet will be 281 * sent before a new packet is allocated. 282 * If you want to send 1024 identical packets 283 * before creating a new packet, 284 * set clone_skb to 1024. 285 */ 286 287 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 288 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 289 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 290 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 291 292 struct in6_addr in6_saddr; 293 struct in6_addr in6_daddr; 294 struct in6_addr cur_in6_daddr; 295 struct in6_addr cur_in6_saddr; 296 /* For ranges */ 297 struct in6_addr min_in6_daddr; 298 struct in6_addr max_in6_daddr; 299 struct in6_addr min_in6_saddr; 300 struct in6_addr max_in6_saddr; 301 302 /* If we're doing ranges, random or incremental, then this 303 * defines the min/max for those ranges. 304 */ 305 __be32 saddr_min; /* inclusive, source IP address */ 306 __be32 saddr_max; /* exclusive, source IP address */ 307 __be32 daddr_min; /* inclusive, dest IP address */ 308 __be32 daddr_max; /* exclusive, dest IP address */ 309 310 __u16 udp_src_min; /* inclusive, source UDP port */ 311 __u16 udp_src_max; /* exclusive, source UDP port */ 312 __u16 udp_dst_min; /* inclusive, dest UDP port */ 313 __u16 udp_dst_max; /* exclusive, dest UDP port */ 314 315 /* DSCP + ECN */ 316 __u8 tos; /* six MSB of (former) IPv4 TOS 317 are for dscp codepoint */ 318 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 319 (see RFC 3260, sec. 4) */ 320 321 /* MPLS */ 322 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */ 323 __be32 labels[MAX_MPLS_LABELS]; 324 325 /* VLAN/SVLAN (802.1Q/Q-in-Q) */ 326 __u8 vlan_p; 327 __u8 vlan_cfi; 328 __u16 vlan_id; /* 0xffff means no vlan tag */ 329 330 __u8 svlan_p; 331 __u8 svlan_cfi; 332 __u16 svlan_id; /* 0xffff means no svlan tag */ 333 334 __u32 src_mac_count; /* How many MACs to iterate through */ 335 __u32 dst_mac_count; /* How many MACs to iterate through */ 336 337 unsigned char dst_mac[ETH_ALEN]; 338 unsigned char src_mac[ETH_ALEN]; 339 340 __u32 cur_dst_mac_offset; 341 __u32 cur_src_mac_offset; 342 __be32 cur_saddr; 343 __be32 cur_daddr; 344 __u16 ip_id; 345 __u16 cur_udp_dst; 346 __u16 cur_udp_src; 347 __u16 cur_queue_map; 348 __u32 cur_pkt_size; 349 __u32 last_pkt_size; 350 351 __u8 hh[14]; 352 /* = { 353 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, 354 355 We fill in SRC address later 356 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 357 0x08, 0x00 358 }; 359 */ 360 __u16 pad; /* pad out the hh struct to an even 16 bytes */ 361 362 struct sk_buff *skb; /* skb we are to transmit next, used for when we 363 * are transmitting the same one multiple times 364 */ 365 struct net_device *odev; /* The out-going device. 366 * Note that the device should have it's 367 * pg_info pointer pointing back to this 368 * device. 369 * Set when the user specifies the out-going 370 * device name (not when the inject is 371 * started as it used to do.) 372 */ 373 char odevname[32]; 374 struct flow_state *flows; 375 unsigned cflows; /* Concurrent flows (config) */ 376 unsigned lflow; /* Flow length (config) */ 377 unsigned nflows; /* accumulated flows (stats) */ 378 unsigned curfl; /* current sequenced flow (state)*/ 379 380 u16 queue_map_min; 381 u16 queue_map_max; 382 __u32 skb_priority; /* skb priority field */ 383 int node; /* Memory node */ 384 385 #ifdef CONFIG_XFRM 386 __u8 ipsmode; /* IPSEC mode (config) */ 387 __u8 ipsproto; /* IPSEC type (config) */ 388 #endif 389 char result[512]; 390 }; 391 392 struct pktgen_hdr { 393 __be32 pgh_magic; 394 __be32 seq_num; 395 __be32 tv_sec; 396 __be32 tv_usec; 397 }; 398 399 static bool pktgen_exiting __read_mostly; 400 401 struct pktgen_thread { 402 spinlock_t if_lock; /* for list of devices */ 403 struct list_head if_list; /* All device here */ 404 struct list_head th_list; 405 struct task_struct *tsk; 406 char result[512]; 407 408 /* Field for thread to receive "posted" events terminate, 409 stop ifs etc. */ 410 411 u32 control; 412 int cpu; 413 414 wait_queue_head_t queue; 415 struct completion start_done; 416 }; 417 418 #define REMOVE 1 419 #define FIND 0 420 421 static inline ktime_t ktime_now(void) 422 { 423 struct timespec ts; 424 ktime_get_ts(&ts); 425 426 return timespec_to_ktime(ts); 427 } 428 429 /* This works even if 32 bit because of careful byte order choice */ 430 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2) 431 { 432 return cmp1.tv64 < cmp2.tv64; 433 } 434 435 static const char version[] = 436 "Packet Generator for packet performance testing. " 437 "Version: " VERSION "\n"; 438 439 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i); 440 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname); 441 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 442 const char *ifname, bool exact); 443 static int pktgen_device_event(struct notifier_block *, unsigned long, void *); 444 static void pktgen_run_all_threads(void); 445 static void pktgen_reset_all_threads(void); 446 static void pktgen_stop_all_threads_ifs(void); 447 448 static void pktgen_stop(struct pktgen_thread *t); 449 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); 450 451 static unsigned int scan_ip6(const char *s, char ip[16]); 452 static unsigned int fmt_ip6(char *s, const char ip[16]); 453 454 /* Module parameters, defaults. */ 455 static int pg_count_d __read_mostly = 1000; 456 static int pg_delay_d __read_mostly; 457 static int pg_clone_skb_d __read_mostly; 458 static int debug __read_mostly; 459 460 static DEFINE_MUTEX(pktgen_thread_lock); 461 static LIST_HEAD(pktgen_threads); 462 463 static struct notifier_block pktgen_notifier_block = { 464 .notifier_call = pktgen_device_event, 465 }; 466 467 /* 468 * /proc handling functions 469 * 470 */ 471 472 static int pgctrl_show(struct seq_file *seq, void *v) 473 { 474 seq_puts(seq, version); 475 return 0; 476 } 477 478 static ssize_t pgctrl_write(struct file *file, const char __user *buf, 479 size_t count, loff_t *ppos) 480 { 481 int err = 0; 482 char data[128]; 483 484 if (!capable(CAP_NET_ADMIN)) { 485 err = -EPERM; 486 goto out; 487 } 488 489 if (count > sizeof(data)) 490 count = sizeof(data); 491 492 if (copy_from_user(data, buf, count)) { 493 err = -EFAULT; 494 goto out; 495 } 496 data[count - 1] = 0; /* Make string */ 497 498 if (!strcmp(data, "stop")) 499 pktgen_stop_all_threads_ifs(); 500 501 else if (!strcmp(data, "start")) 502 pktgen_run_all_threads(); 503 504 else if (!strcmp(data, "reset")) 505 pktgen_reset_all_threads(); 506 507 else 508 pr_warning("Unknown command: %s\n", data); 509 510 err = count; 511 512 out: 513 return err; 514 } 515 516 static int pgctrl_open(struct inode *inode, struct file *file) 517 { 518 return single_open(file, pgctrl_show, PDE(inode)->data); 519 } 520 521 static const struct file_operations pktgen_fops = { 522 .owner = THIS_MODULE, 523 .open = pgctrl_open, 524 .read = seq_read, 525 .llseek = seq_lseek, 526 .write = pgctrl_write, 527 .release = single_release, 528 }; 529 530 static int pktgen_if_show(struct seq_file *seq, void *v) 531 { 532 const struct pktgen_dev *pkt_dev = seq->private; 533 ktime_t stopped; 534 u64 idle; 535 536 seq_printf(seq, 537 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", 538 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, 539 pkt_dev->max_pkt_size); 540 541 seq_printf(seq, 542 " frags: %d delay: %llu clone_skb: %d ifname: %s\n", 543 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay, 544 pkt_dev->clone_skb, pkt_dev->odevname); 545 546 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, 547 pkt_dev->lflow); 548 549 seq_printf(seq, 550 " queue_map_min: %u queue_map_max: %u\n", 551 pkt_dev->queue_map_min, 552 pkt_dev->queue_map_max); 553 554 if (pkt_dev->skb_priority) 555 seq_printf(seq, " skb_priority: %u\n", 556 pkt_dev->skb_priority); 557 558 if (pkt_dev->flags & F_IPV6) { 559 char b1[128], b2[128], b3[128]; 560 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr); 561 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr); 562 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr); 563 seq_printf(seq, 564 " saddr: %s min_saddr: %s max_saddr: %s\n", b1, 565 b2, b3); 566 567 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr); 568 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr); 569 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr); 570 seq_printf(seq, 571 " daddr: %s min_daddr: %s max_daddr: %s\n", b1, 572 b2, b3); 573 574 } else { 575 seq_printf(seq, 576 " dst_min: %s dst_max: %s\n", 577 pkt_dev->dst_min, pkt_dev->dst_max); 578 seq_printf(seq, 579 " src_min: %s src_max: %s\n", 580 pkt_dev->src_min, pkt_dev->src_max); 581 } 582 583 seq_puts(seq, " src_mac: "); 584 585 seq_printf(seq, "%pM ", 586 is_zero_ether_addr(pkt_dev->src_mac) ? 587 pkt_dev->odev->dev_addr : pkt_dev->src_mac); 588 589 seq_printf(seq, "dst_mac: "); 590 seq_printf(seq, "%pM\n", pkt_dev->dst_mac); 591 592 seq_printf(seq, 593 " udp_src_min: %d udp_src_max: %d" 594 " udp_dst_min: %d udp_dst_max: %d\n", 595 pkt_dev->udp_src_min, pkt_dev->udp_src_max, 596 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); 597 598 seq_printf(seq, 599 " src_mac_count: %d dst_mac_count: %d\n", 600 pkt_dev->src_mac_count, pkt_dev->dst_mac_count); 601 602 if (pkt_dev->nr_labels) { 603 unsigned i; 604 seq_printf(seq, " mpls: "); 605 for (i = 0; i < pkt_dev->nr_labels; i++) 606 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), 607 i == pkt_dev->nr_labels-1 ? "\n" : ", "); 608 } 609 610 if (pkt_dev->vlan_id != 0xffff) 611 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", 612 pkt_dev->vlan_id, pkt_dev->vlan_p, 613 pkt_dev->vlan_cfi); 614 615 if (pkt_dev->svlan_id != 0xffff) 616 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", 617 pkt_dev->svlan_id, pkt_dev->svlan_p, 618 pkt_dev->svlan_cfi); 619 620 if (pkt_dev->tos) 621 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); 622 623 if (pkt_dev->traffic_class) 624 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); 625 626 if (pkt_dev->node >= 0) 627 seq_printf(seq, " node: %d\n", pkt_dev->node); 628 629 seq_printf(seq, " Flags: "); 630 631 if (pkt_dev->flags & F_IPV6) 632 seq_printf(seq, "IPV6 "); 633 634 if (pkt_dev->flags & F_IPSRC_RND) 635 seq_printf(seq, "IPSRC_RND "); 636 637 if (pkt_dev->flags & F_IPDST_RND) 638 seq_printf(seq, "IPDST_RND "); 639 640 if (pkt_dev->flags & F_TXSIZE_RND) 641 seq_printf(seq, "TXSIZE_RND "); 642 643 if (pkt_dev->flags & F_UDPSRC_RND) 644 seq_printf(seq, "UDPSRC_RND "); 645 646 if (pkt_dev->flags & F_UDPDST_RND) 647 seq_printf(seq, "UDPDST_RND "); 648 649 if (pkt_dev->flags & F_MPLS_RND) 650 seq_printf(seq, "MPLS_RND "); 651 652 if (pkt_dev->flags & F_QUEUE_MAP_RND) 653 seq_printf(seq, "QUEUE_MAP_RND "); 654 655 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 656 seq_printf(seq, "QUEUE_MAP_CPU "); 657 658 if (pkt_dev->cflows) { 659 if (pkt_dev->flags & F_FLOW_SEQ) 660 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/ 661 else 662 seq_printf(seq, "FLOW_RND "); 663 } 664 665 #ifdef CONFIG_XFRM 666 if (pkt_dev->flags & F_IPSEC_ON) 667 seq_printf(seq, "IPSEC "); 668 #endif 669 670 if (pkt_dev->flags & F_MACSRC_RND) 671 seq_printf(seq, "MACSRC_RND "); 672 673 if (pkt_dev->flags & F_MACDST_RND) 674 seq_printf(seq, "MACDST_RND "); 675 676 if (pkt_dev->flags & F_VID_RND) 677 seq_printf(seq, "VID_RND "); 678 679 if (pkt_dev->flags & F_SVID_RND) 680 seq_printf(seq, "SVID_RND "); 681 682 if (pkt_dev->flags & F_NODE) 683 seq_printf(seq, "NODE_ALLOC "); 684 685 seq_puts(seq, "\n"); 686 687 /* not really stopped, more like last-running-at */ 688 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at; 689 idle = pkt_dev->idle_acc; 690 do_div(idle, NSEC_PER_USEC); 691 692 seq_printf(seq, 693 "Current:\n pkts-sofar: %llu errors: %llu\n", 694 (unsigned long long)pkt_dev->sofar, 695 (unsigned long long)pkt_dev->errors); 696 697 seq_printf(seq, 698 " started: %lluus stopped: %lluus idle: %lluus\n", 699 (unsigned long long) ktime_to_us(pkt_dev->started_at), 700 (unsigned long long) ktime_to_us(stopped), 701 (unsigned long long) idle); 702 703 seq_printf(seq, 704 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 705 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, 706 pkt_dev->cur_src_mac_offset); 707 708 if (pkt_dev->flags & F_IPV6) { 709 char b1[128], b2[128]; 710 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr); 711 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr); 712 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1); 713 } else 714 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n", 715 pkt_dev->cur_saddr, pkt_dev->cur_daddr); 716 717 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", 718 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 719 720 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); 721 722 seq_printf(seq, " flows: %u\n", pkt_dev->nflows); 723 724 if (pkt_dev->result[0]) 725 seq_printf(seq, "Result: %s\n", pkt_dev->result); 726 else 727 seq_printf(seq, "Result: Idle\n"); 728 729 return 0; 730 } 731 732 733 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, 734 __u32 *num) 735 { 736 int i = 0; 737 *num = 0; 738 739 for (; i < maxlen; i++) { 740 int value; 741 char c; 742 *num <<= 4; 743 if (get_user(c, &user_buffer[i])) 744 return -EFAULT; 745 value = hex_to_bin(c); 746 if (value >= 0) 747 *num |= value; 748 else 749 break; 750 } 751 return i; 752 } 753 754 static int count_trail_chars(const char __user * user_buffer, 755 unsigned int maxlen) 756 { 757 int i; 758 759 for (i = 0; i < maxlen; i++) { 760 char c; 761 if (get_user(c, &user_buffer[i])) 762 return -EFAULT; 763 switch (c) { 764 case '\"': 765 case '\n': 766 case '\r': 767 case '\t': 768 case ' ': 769 case '=': 770 break; 771 default: 772 goto done; 773 } 774 } 775 done: 776 return i; 777 } 778 779 static unsigned long num_arg(const char __user * user_buffer, 780 unsigned long maxlen, unsigned long *num) 781 { 782 int i; 783 *num = 0; 784 785 for (i = 0; i < maxlen; i++) { 786 char c; 787 if (get_user(c, &user_buffer[i])) 788 return -EFAULT; 789 if ((c >= '0') && (c <= '9')) { 790 *num *= 10; 791 *num += c - '0'; 792 } else 793 break; 794 } 795 return i; 796 } 797 798 static int strn_len(const char __user * user_buffer, unsigned int maxlen) 799 { 800 int i; 801 802 for (i = 0; i < maxlen; i++) { 803 char c; 804 if (get_user(c, &user_buffer[i])) 805 return -EFAULT; 806 switch (c) { 807 case '\"': 808 case '\n': 809 case '\r': 810 case '\t': 811 case ' ': 812 goto done_str; 813 break; 814 default: 815 break; 816 } 817 } 818 done_str: 819 return i; 820 } 821 822 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) 823 { 824 unsigned n = 0; 825 char c; 826 ssize_t i = 0; 827 int len; 828 829 pkt_dev->nr_labels = 0; 830 do { 831 __u32 tmp; 832 len = hex32_arg(&buffer[i], 8, &tmp); 833 if (len <= 0) 834 return len; 835 pkt_dev->labels[n] = htonl(tmp); 836 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 837 pkt_dev->flags |= F_MPLS_RND; 838 i += len; 839 if (get_user(c, &buffer[i])) 840 return -EFAULT; 841 i++; 842 n++; 843 if (n >= MAX_MPLS_LABELS) 844 return -E2BIG; 845 } while (c == ','); 846 847 pkt_dev->nr_labels = n; 848 return i; 849 } 850 851 static ssize_t pktgen_if_write(struct file *file, 852 const char __user * user_buffer, size_t count, 853 loff_t * offset) 854 { 855 struct seq_file *seq = file->private_data; 856 struct pktgen_dev *pkt_dev = seq->private; 857 int i, max, len; 858 char name[16], valstr[32]; 859 unsigned long value = 0; 860 char *pg_result = NULL; 861 int tmp = 0; 862 char buf[128]; 863 864 pg_result = &(pkt_dev->result[0]); 865 866 if (count < 1) { 867 pr_warning("wrong command format\n"); 868 return -EINVAL; 869 } 870 871 max = count; 872 tmp = count_trail_chars(user_buffer, max); 873 if (tmp < 0) { 874 pr_warning("illegal format\n"); 875 return tmp; 876 } 877 i = tmp; 878 879 /* Read variable name */ 880 881 len = strn_len(&user_buffer[i], sizeof(name) - 1); 882 if (len < 0) 883 return len; 884 885 memset(name, 0, sizeof(name)); 886 if (copy_from_user(name, &user_buffer[i], len)) 887 return -EFAULT; 888 i += len; 889 890 max = count - i; 891 len = count_trail_chars(&user_buffer[i], max); 892 if (len < 0) 893 return len; 894 895 i += len; 896 897 if (debug) { 898 size_t copy = min_t(size_t, count, 1023); 899 char tb[copy + 1]; 900 if (copy_from_user(tb, user_buffer, copy)) 901 return -EFAULT; 902 tb[copy] = 0; 903 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name, 904 (unsigned long)count, tb); 905 } 906 907 if (!strcmp(name, "min_pkt_size")) { 908 len = num_arg(&user_buffer[i], 10, &value); 909 if (len < 0) 910 return len; 911 912 i += len; 913 if (value < 14 + 20 + 8) 914 value = 14 + 20 + 8; 915 if (value != pkt_dev->min_pkt_size) { 916 pkt_dev->min_pkt_size = value; 917 pkt_dev->cur_pkt_size = value; 918 } 919 sprintf(pg_result, "OK: min_pkt_size=%u", 920 pkt_dev->min_pkt_size); 921 return count; 922 } 923 924 if (!strcmp(name, "max_pkt_size")) { 925 len = num_arg(&user_buffer[i], 10, &value); 926 if (len < 0) 927 return len; 928 929 i += len; 930 if (value < 14 + 20 + 8) 931 value = 14 + 20 + 8; 932 if (value != pkt_dev->max_pkt_size) { 933 pkt_dev->max_pkt_size = value; 934 pkt_dev->cur_pkt_size = value; 935 } 936 sprintf(pg_result, "OK: max_pkt_size=%u", 937 pkt_dev->max_pkt_size); 938 return count; 939 } 940 941 /* Shortcut for min = max */ 942 943 if (!strcmp(name, "pkt_size")) { 944 len = num_arg(&user_buffer[i], 10, &value); 945 if (len < 0) 946 return len; 947 948 i += len; 949 if (value < 14 + 20 + 8) 950 value = 14 + 20 + 8; 951 if (value != pkt_dev->min_pkt_size) { 952 pkt_dev->min_pkt_size = value; 953 pkt_dev->max_pkt_size = value; 954 pkt_dev->cur_pkt_size = value; 955 } 956 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 957 return count; 958 } 959 960 if (!strcmp(name, "debug")) { 961 len = num_arg(&user_buffer[i], 10, &value); 962 if (len < 0) 963 return len; 964 965 i += len; 966 debug = value; 967 sprintf(pg_result, "OK: debug=%u", debug); 968 return count; 969 } 970 971 if (!strcmp(name, "frags")) { 972 len = num_arg(&user_buffer[i], 10, &value); 973 if (len < 0) 974 return len; 975 976 i += len; 977 pkt_dev->nfrags = value; 978 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 979 return count; 980 } 981 if (!strcmp(name, "delay")) { 982 len = num_arg(&user_buffer[i], 10, &value); 983 if (len < 0) 984 return len; 985 986 i += len; 987 if (value == 0x7FFFFFFF) 988 pkt_dev->delay = ULLONG_MAX; 989 else 990 pkt_dev->delay = (u64)value; 991 992 sprintf(pg_result, "OK: delay=%llu", 993 (unsigned long long) pkt_dev->delay); 994 return count; 995 } 996 if (!strcmp(name, "rate")) { 997 len = num_arg(&user_buffer[i], 10, &value); 998 if (len < 0) 999 return len; 1000 1001 i += len; 1002 if (!value) 1003 return len; 1004 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value; 1005 if (debug) 1006 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 1007 1008 sprintf(pg_result, "OK: rate=%lu", value); 1009 return count; 1010 } 1011 if (!strcmp(name, "ratep")) { 1012 len = num_arg(&user_buffer[i], 10, &value); 1013 if (len < 0) 1014 return len; 1015 1016 i += len; 1017 if (!value) 1018 return len; 1019 pkt_dev->delay = NSEC_PER_SEC/value; 1020 if (debug) 1021 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 1022 1023 sprintf(pg_result, "OK: rate=%lu", value); 1024 return count; 1025 } 1026 if (!strcmp(name, "udp_src_min")) { 1027 len = num_arg(&user_buffer[i], 10, &value); 1028 if (len < 0) 1029 return len; 1030 1031 i += len; 1032 if (value != pkt_dev->udp_src_min) { 1033 pkt_dev->udp_src_min = value; 1034 pkt_dev->cur_udp_src = value; 1035 } 1036 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 1037 return count; 1038 } 1039 if (!strcmp(name, "udp_dst_min")) { 1040 len = num_arg(&user_buffer[i], 10, &value); 1041 if (len < 0) 1042 return len; 1043 1044 i += len; 1045 if (value != pkt_dev->udp_dst_min) { 1046 pkt_dev->udp_dst_min = value; 1047 pkt_dev->cur_udp_dst = value; 1048 } 1049 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 1050 return count; 1051 } 1052 if (!strcmp(name, "udp_src_max")) { 1053 len = num_arg(&user_buffer[i], 10, &value); 1054 if (len < 0) 1055 return len; 1056 1057 i += len; 1058 if (value != pkt_dev->udp_src_max) { 1059 pkt_dev->udp_src_max = value; 1060 pkt_dev->cur_udp_src = value; 1061 } 1062 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 1063 return count; 1064 } 1065 if (!strcmp(name, "udp_dst_max")) { 1066 len = num_arg(&user_buffer[i], 10, &value); 1067 if (len < 0) 1068 return len; 1069 1070 i += len; 1071 if (value != pkt_dev->udp_dst_max) { 1072 pkt_dev->udp_dst_max = value; 1073 pkt_dev->cur_udp_dst = value; 1074 } 1075 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1076 return count; 1077 } 1078 if (!strcmp(name, "clone_skb")) { 1079 len = num_arg(&user_buffer[i], 10, &value); 1080 if (len < 0) 1081 return len; 1082 1083 i += len; 1084 pkt_dev->clone_skb = value; 1085 1086 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1087 return count; 1088 } 1089 if (!strcmp(name, "count")) { 1090 len = num_arg(&user_buffer[i], 10, &value); 1091 if (len < 0) 1092 return len; 1093 1094 i += len; 1095 pkt_dev->count = value; 1096 sprintf(pg_result, "OK: count=%llu", 1097 (unsigned long long)pkt_dev->count); 1098 return count; 1099 } 1100 if (!strcmp(name, "src_mac_count")) { 1101 len = num_arg(&user_buffer[i], 10, &value); 1102 if (len < 0) 1103 return len; 1104 1105 i += len; 1106 if (pkt_dev->src_mac_count != value) { 1107 pkt_dev->src_mac_count = value; 1108 pkt_dev->cur_src_mac_offset = 0; 1109 } 1110 sprintf(pg_result, "OK: src_mac_count=%d", 1111 pkt_dev->src_mac_count); 1112 return count; 1113 } 1114 if (!strcmp(name, "dst_mac_count")) { 1115 len = num_arg(&user_buffer[i], 10, &value); 1116 if (len < 0) 1117 return len; 1118 1119 i += len; 1120 if (pkt_dev->dst_mac_count != value) { 1121 pkt_dev->dst_mac_count = value; 1122 pkt_dev->cur_dst_mac_offset = 0; 1123 } 1124 sprintf(pg_result, "OK: dst_mac_count=%d", 1125 pkt_dev->dst_mac_count); 1126 return count; 1127 } 1128 if (!strcmp(name, "node")) { 1129 len = num_arg(&user_buffer[i], 10, &value); 1130 if (len < 0) 1131 return len; 1132 1133 i += len; 1134 1135 if (node_possible(value)) { 1136 pkt_dev->node = value; 1137 sprintf(pg_result, "OK: node=%d", pkt_dev->node); 1138 if (pkt_dev->page) { 1139 put_page(pkt_dev->page); 1140 pkt_dev->page = NULL; 1141 } 1142 } 1143 else 1144 sprintf(pg_result, "ERROR: node not possible"); 1145 return count; 1146 } 1147 if (!strcmp(name, "flag")) { 1148 char f[32]; 1149 memset(f, 0, 32); 1150 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1151 if (len < 0) 1152 return len; 1153 1154 if (copy_from_user(f, &user_buffer[i], len)) 1155 return -EFAULT; 1156 i += len; 1157 if (strcmp(f, "IPSRC_RND") == 0) 1158 pkt_dev->flags |= F_IPSRC_RND; 1159 1160 else if (strcmp(f, "!IPSRC_RND") == 0) 1161 pkt_dev->flags &= ~F_IPSRC_RND; 1162 1163 else if (strcmp(f, "TXSIZE_RND") == 0) 1164 pkt_dev->flags |= F_TXSIZE_RND; 1165 1166 else if (strcmp(f, "!TXSIZE_RND") == 0) 1167 pkt_dev->flags &= ~F_TXSIZE_RND; 1168 1169 else if (strcmp(f, "IPDST_RND") == 0) 1170 pkt_dev->flags |= F_IPDST_RND; 1171 1172 else if (strcmp(f, "!IPDST_RND") == 0) 1173 pkt_dev->flags &= ~F_IPDST_RND; 1174 1175 else if (strcmp(f, "UDPSRC_RND") == 0) 1176 pkt_dev->flags |= F_UDPSRC_RND; 1177 1178 else if (strcmp(f, "!UDPSRC_RND") == 0) 1179 pkt_dev->flags &= ~F_UDPSRC_RND; 1180 1181 else if (strcmp(f, "UDPDST_RND") == 0) 1182 pkt_dev->flags |= F_UDPDST_RND; 1183 1184 else if (strcmp(f, "!UDPDST_RND") == 0) 1185 pkt_dev->flags &= ~F_UDPDST_RND; 1186 1187 else if (strcmp(f, "MACSRC_RND") == 0) 1188 pkt_dev->flags |= F_MACSRC_RND; 1189 1190 else if (strcmp(f, "!MACSRC_RND") == 0) 1191 pkt_dev->flags &= ~F_MACSRC_RND; 1192 1193 else if (strcmp(f, "MACDST_RND") == 0) 1194 pkt_dev->flags |= F_MACDST_RND; 1195 1196 else if (strcmp(f, "!MACDST_RND") == 0) 1197 pkt_dev->flags &= ~F_MACDST_RND; 1198 1199 else if (strcmp(f, "MPLS_RND") == 0) 1200 pkt_dev->flags |= F_MPLS_RND; 1201 1202 else if (strcmp(f, "!MPLS_RND") == 0) 1203 pkt_dev->flags &= ~F_MPLS_RND; 1204 1205 else if (strcmp(f, "VID_RND") == 0) 1206 pkt_dev->flags |= F_VID_RND; 1207 1208 else if (strcmp(f, "!VID_RND") == 0) 1209 pkt_dev->flags &= ~F_VID_RND; 1210 1211 else if (strcmp(f, "SVID_RND") == 0) 1212 pkt_dev->flags |= F_SVID_RND; 1213 1214 else if (strcmp(f, "!SVID_RND") == 0) 1215 pkt_dev->flags &= ~F_SVID_RND; 1216 1217 else if (strcmp(f, "FLOW_SEQ") == 0) 1218 pkt_dev->flags |= F_FLOW_SEQ; 1219 1220 else if (strcmp(f, "QUEUE_MAP_RND") == 0) 1221 pkt_dev->flags |= F_QUEUE_MAP_RND; 1222 1223 else if (strcmp(f, "!QUEUE_MAP_RND") == 0) 1224 pkt_dev->flags &= ~F_QUEUE_MAP_RND; 1225 1226 else if (strcmp(f, "QUEUE_MAP_CPU") == 0) 1227 pkt_dev->flags |= F_QUEUE_MAP_CPU; 1228 1229 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0) 1230 pkt_dev->flags &= ~F_QUEUE_MAP_CPU; 1231 #ifdef CONFIG_XFRM 1232 else if (strcmp(f, "IPSEC") == 0) 1233 pkt_dev->flags |= F_IPSEC_ON; 1234 #endif 1235 1236 else if (strcmp(f, "!IPV6") == 0) 1237 pkt_dev->flags &= ~F_IPV6; 1238 1239 else if (strcmp(f, "NODE_ALLOC") == 0) 1240 pkt_dev->flags |= F_NODE; 1241 1242 else if (strcmp(f, "!NODE_ALLOC") == 0) 1243 pkt_dev->flags &= ~F_NODE; 1244 1245 else { 1246 sprintf(pg_result, 1247 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1248 f, 1249 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1250 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n"); 1251 return count; 1252 } 1253 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1254 return count; 1255 } 1256 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1257 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1258 if (len < 0) 1259 return len; 1260 1261 if (copy_from_user(buf, &user_buffer[i], len)) 1262 return -EFAULT; 1263 buf[len] = 0; 1264 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1265 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1266 strncpy(pkt_dev->dst_min, buf, len); 1267 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1268 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1269 } 1270 if (debug) 1271 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n", 1272 pkt_dev->dst_min); 1273 i += len; 1274 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1275 return count; 1276 } 1277 if (!strcmp(name, "dst_max")) { 1278 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1279 if (len < 0) 1280 return len; 1281 1282 1283 if (copy_from_user(buf, &user_buffer[i], len)) 1284 return -EFAULT; 1285 1286 buf[len] = 0; 1287 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1288 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1289 strncpy(pkt_dev->dst_max, buf, len); 1290 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1291 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1292 } 1293 if (debug) 1294 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n", 1295 pkt_dev->dst_max); 1296 i += len; 1297 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1298 return count; 1299 } 1300 if (!strcmp(name, "dst6")) { 1301 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1302 if (len < 0) 1303 return len; 1304 1305 pkt_dev->flags |= F_IPV6; 1306 1307 if (copy_from_user(buf, &user_buffer[i], len)) 1308 return -EFAULT; 1309 buf[len] = 0; 1310 1311 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1312 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1313 1314 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr); 1315 1316 if (debug) 1317 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf); 1318 1319 i += len; 1320 sprintf(pg_result, "OK: dst6=%s", buf); 1321 return count; 1322 } 1323 if (!strcmp(name, "dst6_min")) { 1324 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1325 if (len < 0) 1326 return len; 1327 1328 pkt_dev->flags |= F_IPV6; 1329 1330 if (copy_from_user(buf, &user_buffer[i], len)) 1331 return -EFAULT; 1332 buf[len] = 0; 1333 1334 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1335 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1336 1337 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, 1338 &pkt_dev->min_in6_daddr); 1339 if (debug) 1340 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf); 1341 1342 i += len; 1343 sprintf(pg_result, "OK: dst6_min=%s", buf); 1344 return count; 1345 } 1346 if (!strcmp(name, "dst6_max")) { 1347 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1348 if (len < 0) 1349 return len; 1350 1351 pkt_dev->flags |= F_IPV6; 1352 1353 if (copy_from_user(buf, &user_buffer[i], len)) 1354 return -EFAULT; 1355 buf[len] = 0; 1356 1357 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1358 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1359 1360 if (debug) 1361 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf); 1362 1363 i += len; 1364 sprintf(pg_result, "OK: dst6_max=%s", buf); 1365 return count; 1366 } 1367 if (!strcmp(name, "src6")) { 1368 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1369 if (len < 0) 1370 return len; 1371 1372 pkt_dev->flags |= F_IPV6; 1373 1374 if (copy_from_user(buf, &user_buffer[i], len)) 1375 return -EFAULT; 1376 buf[len] = 0; 1377 1378 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1379 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1380 1381 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr); 1382 1383 if (debug) 1384 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf); 1385 1386 i += len; 1387 sprintf(pg_result, "OK: src6=%s", buf); 1388 return count; 1389 } 1390 if (!strcmp(name, "src_min")) { 1391 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1392 if (len < 0) 1393 return len; 1394 1395 if (copy_from_user(buf, &user_buffer[i], len)) 1396 return -EFAULT; 1397 buf[len] = 0; 1398 if (strcmp(buf, pkt_dev->src_min) != 0) { 1399 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1400 strncpy(pkt_dev->src_min, buf, len); 1401 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1402 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1403 } 1404 if (debug) 1405 printk(KERN_DEBUG "pktgen: src_min set to: %s\n", 1406 pkt_dev->src_min); 1407 i += len; 1408 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1409 return count; 1410 } 1411 if (!strcmp(name, "src_max")) { 1412 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1413 if (len < 0) 1414 return len; 1415 1416 if (copy_from_user(buf, &user_buffer[i], len)) 1417 return -EFAULT; 1418 buf[len] = 0; 1419 if (strcmp(buf, pkt_dev->src_max) != 0) { 1420 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1421 strncpy(pkt_dev->src_max, buf, len); 1422 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1423 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1424 } 1425 if (debug) 1426 printk(KERN_DEBUG "pktgen: src_max set to: %s\n", 1427 pkt_dev->src_max); 1428 i += len; 1429 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1430 return count; 1431 } 1432 if (!strcmp(name, "dst_mac")) { 1433 char *v = valstr; 1434 unsigned char old_dmac[ETH_ALEN]; 1435 unsigned char *m = pkt_dev->dst_mac; 1436 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN); 1437 1438 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1439 if (len < 0) 1440 return len; 1441 1442 memset(valstr, 0, sizeof(valstr)); 1443 if (copy_from_user(valstr, &user_buffer[i], len)) 1444 return -EFAULT; 1445 i += len; 1446 1447 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) { 1448 int value; 1449 1450 value = hex_to_bin(*v); 1451 if (value >= 0) 1452 *m = *m * 16 + value; 1453 1454 if (*v == ':') { 1455 m++; 1456 *m = 0; 1457 } 1458 } 1459 1460 /* Set up Dest MAC */ 1461 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac)) 1462 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 1463 1464 sprintf(pg_result, "OK: dstmac"); 1465 return count; 1466 } 1467 if (!strcmp(name, "src_mac")) { 1468 char *v = valstr; 1469 unsigned char old_smac[ETH_ALEN]; 1470 unsigned char *m = pkt_dev->src_mac; 1471 1472 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN); 1473 1474 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1475 if (len < 0) 1476 return len; 1477 1478 memset(valstr, 0, sizeof(valstr)); 1479 if (copy_from_user(valstr, &user_buffer[i], len)) 1480 return -EFAULT; 1481 i += len; 1482 1483 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) { 1484 int value; 1485 1486 value = hex_to_bin(*v); 1487 if (value >= 0) 1488 *m = *m * 16 + value; 1489 1490 if (*v == ':') { 1491 m++; 1492 *m = 0; 1493 } 1494 } 1495 1496 /* Set up Src MAC */ 1497 if (compare_ether_addr(old_smac, pkt_dev->src_mac)) 1498 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN); 1499 1500 sprintf(pg_result, "OK: srcmac"); 1501 return count; 1502 } 1503 1504 if (!strcmp(name, "clear_counters")) { 1505 pktgen_clear_counters(pkt_dev); 1506 sprintf(pg_result, "OK: Clearing counters.\n"); 1507 return count; 1508 } 1509 1510 if (!strcmp(name, "flows")) { 1511 len = num_arg(&user_buffer[i], 10, &value); 1512 if (len < 0) 1513 return len; 1514 1515 i += len; 1516 if (value > MAX_CFLOWS) 1517 value = MAX_CFLOWS; 1518 1519 pkt_dev->cflows = value; 1520 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1521 return count; 1522 } 1523 1524 if (!strcmp(name, "flowlen")) { 1525 len = num_arg(&user_buffer[i], 10, &value); 1526 if (len < 0) 1527 return len; 1528 1529 i += len; 1530 pkt_dev->lflow = value; 1531 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1532 return count; 1533 } 1534 1535 if (!strcmp(name, "queue_map_min")) { 1536 len = num_arg(&user_buffer[i], 5, &value); 1537 if (len < 0) 1538 return len; 1539 1540 i += len; 1541 pkt_dev->queue_map_min = value; 1542 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1543 return count; 1544 } 1545 1546 if (!strcmp(name, "queue_map_max")) { 1547 len = num_arg(&user_buffer[i], 5, &value); 1548 if (len < 0) 1549 return len; 1550 1551 i += len; 1552 pkt_dev->queue_map_max = value; 1553 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1554 return count; 1555 } 1556 1557 if (!strcmp(name, "mpls")) { 1558 unsigned n, cnt; 1559 1560 len = get_labels(&user_buffer[i], pkt_dev); 1561 if (len < 0) 1562 return len; 1563 i += len; 1564 cnt = sprintf(pg_result, "OK: mpls="); 1565 for (n = 0; n < pkt_dev->nr_labels; n++) 1566 cnt += sprintf(pg_result + cnt, 1567 "%08x%s", ntohl(pkt_dev->labels[n]), 1568 n == pkt_dev->nr_labels-1 ? "" : ","); 1569 1570 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1571 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1572 pkt_dev->svlan_id = 0xffff; 1573 1574 if (debug) 1575 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n"); 1576 } 1577 return count; 1578 } 1579 1580 if (!strcmp(name, "vlan_id")) { 1581 len = num_arg(&user_buffer[i], 4, &value); 1582 if (len < 0) 1583 return len; 1584 1585 i += len; 1586 if (value <= 4095) { 1587 pkt_dev->vlan_id = value; /* turn on VLAN */ 1588 1589 if (debug) 1590 printk(KERN_DEBUG "pktgen: VLAN turned on\n"); 1591 1592 if (debug && pkt_dev->nr_labels) 1593 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1594 1595 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1596 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1597 } else { 1598 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1599 pkt_dev->svlan_id = 0xffff; 1600 1601 if (debug) 1602 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1603 } 1604 return count; 1605 } 1606 1607 if (!strcmp(name, "vlan_p")) { 1608 len = num_arg(&user_buffer[i], 1, &value); 1609 if (len < 0) 1610 return len; 1611 1612 i += len; 1613 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1614 pkt_dev->vlan_p = value; 1615 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1616 } else { 1617 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1618 } 1619 return count; 1620 } 1621 1622 if (!strcmp(name, "vlan_cfi")) { 1623 len = num_arg(&user_buffer[i], 1, &value); 1624 if (len < 0) 1625 return len; 1626 1627 i += len; 1628 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1629 pkt_dev->vlan_cfi = value; 1630 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1631 } else { 1632 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1633 } 1634 return count; 1635 } 1636 1637 if (!strcmp(name, "svlan_id")) { 1638 len = num_arg(&user_buffer[i], 4, &value); 1639 if (len < 0) 1640 return len; 1641 1642 i += len; 1643 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1644 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1645 1646 if (debug) 1647 printk(KERN_DEBUG "pktgen: SVLAN turned on\n"); 1648 1649 if (debug && pkt_dev->nr_labels) 1650 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1651 1652 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1653 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1654 } else { 1655 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1656 pkt_dev->svlan_id = 0xffff; 1657 1658 if (debug) 1659 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1660 } 1661 return count; 1662 } 1663 1664 if (!strcmp(name, "svlan_p")) { 1665 len = num_arg(&user_buffer[i], 1, &value); 1666 if (len < 0) 1667 return len; 1668 1669 i += len; 1670 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1671 pkt_dev->svlan_p = value; 1672 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1673 } else { 1674 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1675 } 1676 return count; 1677 } 1678 1679 if (!strcmp(name, "svlan_cfi")) { 1680 len = num_arg(&user_buffer[i], 1, &value); 1681 if (len < 0) 1682 return len; 1683 1684 i += len; 1685 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1686 pkt_dev->svlan_cfi = value; 1687 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1688 } else { 1689 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1690 } 1691 return count; 1692 } 1693 1694 if (!strcmp(name, "tos")) { 1695 __u32 tmp_value = 0; 1696 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1697 if (len < 0) 1698 return len; 1699 1700 i += len; 1701 if (len == 2) { 1702 pkt_dev->tos = tmp_value; 1703 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1704 } else { 1705 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1706 } 1707 return count; 1708 } 1709 1710 if (!strcmp(name, "traffic_class")) { 1711 __u32 tmp_value = 0; 1712 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1713 if (len < 0) 1714 return len; 1715 1716 i += len; 1717 if (len == 2) { 1718 pkt_dev->traffic_class = tmp_value; 1719 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1720 } else { 1721 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1722 } 1723 return count; 1724 } 1725 1726 if (!strcmp(name, "skb_priority")) { 1727 len = num_arg(&user_buffer[i], 9, &value); 1728 if (len < 0) 1729 return len; 1730 1731 i += len; 1732 pkt_dev->skb_priority = value; 1733 sprintf(pg_result, "OK: skb_priority=%i", 1734 pkt_dev->skb_priority); 1735 return count; 1736 } 1737 1738 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1739 return -EINVAL; 1740 } 1741 1742 static int pktgen_if_open(struct inode *inode, struct file *file) 1743 { 1744 return single_open(file, pktgen_if_show, PDE(inode)->data); 1745 } 1746 1747 static const struct file_operations pktgen_if_fops = { 1748 .owner = THIS_MODULE, 1749 .open = pktgen_if_open, 1750 .read = seq_read, 1751 .llseek = seq_lseek, 1752 .write = pktgen_if_write, 1753 .release = single_release, 1754 }; 1755 1756 static int pktgen_thread_show(struct seq_file *seq, void *v) 1757 { 1758 struct pktgen_thread *t = seq->private; 1759 const struct pktgen_dev *pkt_dev; 1760 1761 BUG_ON(!t); 1762 1763 seq_printf(seq, "Running: "); 1764 1765 if_lock(t); 1766 list_for_each_entry(pkt_dev, &t->if_list, list) 1767 if (pkt_dev->running) 1768 seq_printf(seq, "%s ", pkt_dev->odevname); 1769 1770 seq_printf(seq, "\nStopped: "); 1771 1772 list_for_each_entry(pkt_dev, &t->if_list, list) 1773 if (!pkt_dev->running) 1774 seq_printf(seq, "%s ", pkt_dev->odevname); 1775 1776 if (t->result[0]) 1777 seq_printf(seq, "\nResult: %s\n", t->result); 1778 else 1779 seq_printf(seq, "\nResult: NA\n"); 1780 1781 if_unlock(t); 1782 1783 return 0; 1784 } 1785 1786 static ssize_t pktgen_thread_write(struct file *file, 1787 const char __user * user_buffer, 1788 size_t count, loff_t * offset) 1789 { 1790 struct seq_file *seq = file->private_data; 1791 struct pktgen_thread *t = seq->private; 1792 int i, max, len, ret; 1793 char name[40]; 1794 char *pg_result; 1795 1796 if (count < 1) { 1797 // sprintf(pg_result, "Wrong command format"); 1798 return -EINVAL; 1799 } 1800 1801 max = count; 1802 len = count_trail_chars(user_buffer, max); 1803 if (len < 0) 1804 return len; 1805 1806 i = len; 1807 1808 /* Read variable name */ 1809 1810 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1811 if (len < 0) 1812 return len; 1813 1814 memset(name, 0, sizeof(name)); 1815 if (copy_from_user(name, &user_buffer[i], len)) 1816 return -EFAULT; 1817 i += len; 1818 1819 max = count - i; 1820 len = count_trail_chars(&user_buffer[i], max); 1821 if (len < 0) 1822 return len; 1823 1824 i += len; 1825 1826 if (debug) 1827 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n", 1828 name, (unsigned long)count); 1829 1830 if (!t) { 1831 pr_err("ERROR: No thread\n"); 1832 ret = -EINVAL; 1833 goto out; 1834 } 1835 1836 pg_result = &(t->result[0]); 1837 1838 if (!strcmp(name, "add_device")) { 1839 char f[32]; 1840 memset(f, 0, 32); 1841 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1842 if (len < 0) { 1843 ret = len; 1844 goto out; 1845 } 1846 if (copy_from_user(f, &user_buffer[i], len)) 1847 return -EFAULT; 1848 i += len; 1849 mutex_lock(&pktgen_thread_lock); 1850 pktgen_add_device(t, f); 1851 mutex_unlock(&pktgen_thread_lock); 1852 ret = count; 1853 sprintf(pg_result, "OK: add_device=%s", f); 1854 goto out; 1855 } 1856 1857 if (!strcmp(name, "rem_device_all")) { 1858 mutex_lock(&pktgen_thread_lock); 1859 t->control |= T_REMDEVALL; 1860 mutex_unlock(&pktgen_thread_lock); 1861 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1862 ret = count; 1863 sprintf(pg_result, "OK: rem_device_all"); 1864 goto out; 1865 } 1866 1867 if (!strcmp(name, "max_before_softirq")) { 1868 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1869 ret = count; 1870 goto out; 1871 } 1872 1873 ret = -EINVAL; 1874 out: 1875 return ret; 1876 } 1877 1878 static int pktgen_thread_open(struct inode *inode, struct file *file) 1879 { 1880 return single_open(file, pktgen_thread_show, PDE(inode)->data); 1881 } 1882 1883 static const struct file_operations pktgen_thread_fops = { 1884 .owner = THIS_MODULE, 1885 .open = pktgen_thread_open, 1886 .read = seq_read, 1887 .llseek = seq_lseek, 1888 .write = pktgen_thread_write, 1889 .release = single_release, 1890 }; 1891 1892 /* Think find or remove for NN */ 1893 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove) 1894 { 1895 struct pktgen_thread *t; 1896 struct pktgen_dev *pkt_dev = NULL; 1897 bool exact = (remove == FIND); 1898 1899 list_for_each_entry(t, &pktgen_threads, th_list) { 1900 pkt_dev = pktgen_find_dev(t, ifname, exact); 1901 if (pkt_dev) { 1902 if (remove) { 1903 if_lock(t); 1904 pkt_dev->removal_mark = 1; 1905 t->control |= T_REMDEV; 1906 if_unlock(t); 1907 } 1908 break; 1909 } 1910 } 1911 return pkt_dev; 1912 } 1913 1914 /* 1915 * mark a device for removal 1916 */ 1917 static void pktgen_mark_device(const char *ifname) 1918 { 1919 struct pktgen_dev *pkt_dev = NULL; 1920 const int max_tries = 10, msec_per_try = 125; 1921 int i = 0; 1922 1923 mutex_lock(&pktgen_thread_lock); 1924 pr_debug("%s: marking %s for removal\n", __func__, ifname); 1925 1926 while (1) { 1927 1928 pkt_dev = __pktgen_NN_threads(ifname, REMOVE); 1929 if (pkt_dev == NULL) 1930 break; /* success */ 1931 1932 mutex_unlock(&pktgen_thread_lock); 1933 pr_debug("%s: waiting for %s to disappear....\n", 1934 __func__, ifname); 1935 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1936 mutex_lock(&pktgen_thread_lock); 1937 1938 if (++i >= max_tries) { 1939 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n", 1940 __func__, msec_per_try * i, ifname); 1941 break; 1942 } 1943 1944 } 1945 1946 mutex_unlock(&pktgen_thread_lock); 1947 } 1948 1949 static void pktgen_change_name(struct net_device *dev) 1950 { 1951 struct pktgen_thread *t; 1952 1953 list_for_each_entry(t, &pktgen_threads, th_list) { 1954 struct pktgen_dev *pkt_dev; 1955 1956 list_for_each_entry(pkt_dev, &t->if_list, list) { 1957 if (pkt_dev->odev != dev) 1958 continue; 1959 1960 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 1961 1962 pkt_dev->entry = proc_create_data(dev->name, 0600, 1963 pg_proc_dir, 1964 &pktgen_if_fops, 1965 pkt_dev); 1966 if (!pkt_dev->entry) 1967 pr_err("can't move proc entry for '%s'\n", 1968 dev->name); 1969 break; 1970 } 1971 } 1972 } 1973 1974 static int pktgen_device_event(struct notifier_block *unused, 1975 unsigned long event, void *ptr) 1976 { 1977 struct net_device *dev = ptr; 1978 1979 if (!net_eq(dev_net(dev), &init_net)) 1980 return NOTIFY_DONE; 1981 1982 /* It is OK that we do not hold the group lock right now, 1983 * as we run under the RTNL lock. 1984 */ 1985 1986 switch (event) { 1987 case NETDEV_CHANGENAME: 1988 pktgen_change_name(dev); 1989 break; 1990 1991 case NETDEV_UNREGISTER: 1992 pktgen_mark_device(dev->name); 1993 break; 1994 } 1995 1996 return NOTIFY_DONE; 1997 } 1998 1999 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev, 2000 const char *ifname) 2001 { 2002 char b[IFNAMSIZ+5]; 2003 int i; 2004 2005 for (i = 0; ifname[i] != '@'; i++) { 2006 if (i == IFNAMSIZ) 2007 break; 2008 2009 b[i] = ifname[i]; 2010 } 2011 b[i] = 0; 2012 2013 return dev_get_by_name(&init_net, b); 2014 } 2015 2016 2017 /* Associate pktgen_dev with a device. */ 2018 2019 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname) 2020 { 2021 struct net_device *odev; 2022 int err; 2023 2024 /* Clean old setups */ 2025 if (pkt_dev->odev) { 2026 dev_put(pkt_dev->odev); 2027 pkt_dev->odev = NULL; 2028 } 2029 2030 odev = pktgen_dev_get_by_name(pkt_dev, ifname); 2031 if (!odev) { 2032 pr_err("no such netdevice: \"%s\"\n", ifname); 2033 return -ENODEV; 2034 } 2035 2036 if (odev->type != ARPHRD_ETHER) { 2037 pr_err("not an ethernet device: \"%s\"\n", ifname); 2038 err = -EINVAL; 2039 } else if (!netif_running(odev)) { 2040 pr_err("device is down: \"%s\"\n", ifname); 2041 err = -ENETDOWN; 2042 } else { 2043 pkt_dev->odev = odev; 2044 return 0; 2045 } 2046 2047 dev_put(odev); 2048 return err; 2049 } 2050 2051 /* Read pkt_dev from the interface and set up internal pktgen_dev 2052 * structure to have the right information to create/send packets 2053 */ 2054 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 2055 { 2056 int ntxq; 2057 2058 if (!pkt_dev->odev) { 2059 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n"); 2060 sprintf(pkt_dev->result, 2061 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 2062 return; 2063 } 2064 2065 /* make sure that we don't pick a non-existing transmit queue */ 2066 ntxq = pkt_dev->odev->real_num_tx_queues; 2067 2068 if (ntxq <= pkt_dev->queue_map_min) { 2069 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2070 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, 2071 pkt_dev->odevname); 2072 pkt_dev->queue_map_min = ntxq - 1; 2073 } 2074 if (pkt_dev->queue_map_max >= ntxq) { 2075 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2076 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, 2077 pkt_dev->odevname); 2078 pkt_dev->queue_map_max = ntxq - 1; 2079 } 2080 2081 /* Default to the interface's mac if not explicitly set. */ 2082 2083 if (is_zero_ether_addr(pkt_dev->src_mac)) 2084 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN); 2085 2086 /* Set up Dest MAC */ 2087 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 2088 2089 /* Set up pkt size */ 2090 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2091 2092 if (pkt_dev->flags & F_IPV6) { 2093 /* 2094 * Skip this automatic address setting until locks or functions 2095 * gets exported 2096 */ 2097 2098 #ifdef NOTNOW 2099 int i, set = 0, err = 1; 2100 struct inet6_dev *idev; 2101 2102 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2103 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2104 set = 1; 2105 break; 2106 } 2107 2108 if (!set) { 2109 2110 /* 2111 * Use linklevel address if unconfigured. 2112 * 2113 * use ipv6_get_lladdr if/when it's get exported 2114 */ 2115 2116 rcu_read_lock(); 2117 idev = __in6_dev_get(pkt_dev->odev); 2118 if (idev) { 2119 struct inet6_ifaddr *ifp; 2120 2121 read_lock_bh(&idev->lock); 2122 for (ifp = idev->addr_list; ifp; 2123 ifp = ifp->if_next) { 2124 if (ifp->scope == IFA_LINK && 2125 !(ifp->flags & IFA_F_TENTATIVE)) { 2126 ipv6_addr_copy(&pkt_dev-> 2127 cur_in6_saddr, 2128 &ifp->addr); 2129 err = 0; 2130 break; 2131 } 2132 } 2133 read_unlock_bh(&idev->lock); 2134 } 2135 rcu_read_unlock(); 2136 if (err) 2137 pr_err("ERROR: IPv6 link address not available\n"); 2138 } 2139 #endif 2140 } else { 2141 pkt_dev->saddr_min = 0; 2142 pkt_dev->saddr_max = 0; 2143 if (strlen(pkt_dev->src_min) == 0) { 2144 2145 struct in_device *in_dev; 2146 2147 rcu_read_lock(); 2148 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2149 if (in_dev) { 2150 if (in_dev->ifa_list) { 2151 pkt_dev->saddr_min = 2152 in_dev->ifa_list->ifa_address; 2153 pkt_dev->saddr_max = pkt_dev->saddr_min; 2154 } 2155 } 2156 rcu_read_unlock(); 2157 } else { 2158 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2159 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2160 } 2161 2162 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2163 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2164 } 2165 /* Initialize current values. */ 2166 pkt_dev->cur_dst_mac_offset = 0; 2167 pkt_dev->cur_src_mac_offset = 0; 2168 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2169 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2170 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2171 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2172 pkt_dev->nflows = 0; 2173 } 2174 2175 2176 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) 2177 { 2178 ktime_t start_time, end_time; 2179 s64 remaining; 2180 struct hrtimer_sleeper t; 2181 2182 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); 2183 hrtimer_set_expires(&t.timer, spin_until); 2184 2185 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer)); 2186 if (remaining <= 0) { 2187 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2188 return; 2189 } 2190 2191 start_time = ktime_now(); 2192 if (remaining < 100000) 2193 ndelay(remaining); /* really small just spin */ 2194 else { 2195 /* see do_nanosleep */ 2196 hrtimer_init_sleeper(&t, current); 2197 do { 2198 set_current_state(TASK_INTERRUPTIBLE); 2199 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS); 2200 if (!hrtimer_active(&t.timer)) 2201 t.task = NULL; 2202 2203 if (likely(t.task)) 2204 schedule(); 2205 2206 hrtimer_cancel(&t.timer); 2207 } while (t.task && pkt_dev->running && !signal_pending(current)); 2208 __set_current_state(TASK_RUNNING); 2209 } 2210 end_time = ktime_now(); 2211 2212 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); 2213 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2214 } 2215 2216 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2217 { 2218 pkt_dev->pkt_overhead = 0; 2219 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2220 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2221 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2222 } 2223 2224 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) 2225 { 2226 return !!(pkt_dev->flows[flow].flags & F_INIT); 2227 } 2228 2229 static inline int f_pick(struct pktgen_dev *pkt_dev) 2230 { 2231 int flow = pkt_dev->curfl; 2232 2233 if (pkt_dev->flags & F_FLOW_SEQ) { 2234 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2235 /* reset time */ 2236 pkt_dev->flows[flow].count = 0; 2237 pkt_dev->flows[flow].flags = 0; 2238 pkt_dev->curfl += 1; 2239 if (pkt_dev->curfl >= pkt_dev->cflows) 2240 pkt_dev->curfl = 0; /*reset */ 2241 } 2242 } else { 2243 flow = random32() % pkt_dev->cflows; 2244 pkt_dev->curfl = flow; 2245 2246 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2247 pkt_dev->flows[flow].count = 0; 2248 pkt_dev->flows[flow].flags = 0; 2249 } 2250 } 2251 2252 return pkt_dev->curfl; 2253 } 2254 2255 2256 #ifdef CONFIG_XFRM 2257 /* If there was already an IPSEC SA, we keep it as is, else 2258 * we go look for it ... 2259 */ 2260 #define DUMMY_MARK 0 2261 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2262 { 2263 struct xfrm_state *x = pkt_dev->flows[flow].x; 2264 if (!x) { 2265 /*slow path: we dont already have xfrm_state*/ 2266 x = xfrm_stateonly_find(&init_net, DUMMY_MARK, 2267 (xfrm_address_t *)&pkt_dev->cur_daddr, 2268 (xfrm_address_t *)&pkt_dev->cur_saddr, 2269 AF_INET, 2270 pkt_dev->ipsmode, 2271 pkt_dev->ipsproto, 0); 2272 if (x) { 2273 pkt_dev->flows[flow].x = x; 2274 set_pkt_overhead(pkt_dev); 2275 pkt_dev->pkt_overhead += x->props.header_len; 2276 } 2277 2278 } 2279 } 2280 #endif 2281 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2282 { 2283 2284 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2285 pkt_dev->cur_queue_map = smp_processor_id(); 2286 2287 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { 2288 __u16 t; 2289 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2290 t = random32() % 2291 (pkt_dev->queue_map_max - 2292 pkt_dev->queue_map_min + 1) 2293 + pkt_dev->queue_map_min; 2294 } else { 2295 t = pkt_dev->cur_queue_map + 1; 2296 if (t > pkt_dev->queue_map_max) 2297 t = pkt_dev->queue_map_min; 2298 } 2299 pkt_dev->cur_queue_map = t; 2300 } 2301 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2302 } 2303 2304 /* Increment/randomize headers according to flags and current values 2305 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2306 */ 2307 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2308 { 2309 __u32 imn; 2310 __u32 imx; 2311 int flow = 0; 2312 2313 if (pkt_dev->cflows) 2314 flow = f_pick(pkt_dev); 2315 2316 /* Deal with source MAC */ 2317 if (pkt_dev->src_mac_count > 1) { 2318 __u32 mc; 2319 __u32 tmp; 2320 2321 if (pkt_dev->flags & F_MACSRC_RND) 2322 mc = random32() % pkt_dev->src_mac_count; 2323 else { 2324 mc = pkt_dev->cur_src_mac_offset++; 2325 if (pkt_dev->cur_src_mac_offset >= 2326 pkt_dev->src_mac_count) 2327 pkt_dev->cur_src_mac_offset = 0; 2328 } 2329 2330 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2331 pkt_dev->hh[11] = tmp; 2332 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2333 pkt_dev->hh[10] = tmp; 2334 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2335 pkt_dev->hh[9] = tmp; 2336 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2337 pkt_dev->hh[8] = tmp; 2338 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2339 pkt_dev->hh[7] = tmp; 2340 } 2341 2342 /* Deal with Destination MAC */ 2343 if (pkt_dev->dst_mac_count > 1) { 2344 __u32 mc; 2345 __u32 tmp; 2346 2347 if (pkt_dev->flags & F_MACDST_RND) 2348 mc = random32() % pkt_dev->dst_mac_count; 2349 2350 else { 2351 mc = pkt_dev->cur_dst_mac_offset++; 2352 if (pkt_dev->cur_dst_mac_offset >= 2353 pkt_dev->dst_mac_count) { 2354 pkt_dev->cur_dst_mac_offset = 0; 2355 } 2356 } 2357 2358 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2359 pkt_dev->hh[5] = tmp; 2360 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2361 pkt_dev->hh[4] = tmp; 2362 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2363 pkt_dev->hh[3] = tmp; 2364 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2365 pkt_dev->hh[2] = tmp; 2366 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2367 pkt_dev->hh[1] = tmp; 2368 } 2369 2370 if (pkt_dev->flags & F_MPLS_RND) { 2371 unsigned i; 2372 for (i = 0; i < pkt_dev->nr_labels; i++) 2373 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2374 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2375 ((__force __be32)random32() & 2376 htonl(0x000fffff)); 2377 } 2378 2379 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2380 pkt_dev->vlan_id = random32() & (4096-1); 2381 } 2382 2383 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2384 pkt_dev->svlan_id = random32() & (4096 - 1); 2385 } 2386 2387 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2388 if (pkt_dev->flags & F_UDPSRC_RND) 2389 pkt_dev->cur_udp_src = random32() % 2390 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2391 + pkt_dev->udp_src_min; 2392 2393 else { 2394 pkt_dev->cur_udp_src++; 2395 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2396 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2397 } 2398 } 2399 2400 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2401 if (pkt_dev->flags & F_UDPDST_RND) { 2402 pkt_dev->cur_udp_dst = random32() % 2403 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2404 + pkt_dev->udp_dst_min; 2405 } else { 2406 pkt_dev->cur_udp_dst++; 2407 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2408 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2409 } 2410 } 2411 2412 if (!(pkt_dev->flags & F_IPV6)) { 2413 2414 imn = ntohl(pkt_dev->saddr_min); 2415 imx = ntohl(pkt_dev->saddr_max); 2416 if (imn < imx) { 2417 __u32 t; 2418 if (pkt_dev->flags & F_IPSRC_RND) 2419 t = random32() % (imx - imn) + imn; 2420 else { 2421 t = ntohl(pkt_dev->cur_saddr); 2422 t++; 2423 if (t > imx) 2424 t = imn; 2425 2426 } 2427 pkt_dev->cur_saddr = htonl(t); 2428 } 2429 2430 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2431 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2432 } else { 2433 imn = ntohl(pkt_dev->daddr_min); 2434 imx = ntohl(pkt_dev->daddr_max); 2435 if (imn < imx) { 2436 __u32 t; 2437 __be32 s; 2438 if (pkt_dev->flags & F_IPDST_RND) { 2439 2440 t = random32() % (imx - imn) + imn; 2441 s = htonl(t); 2442 2443 while (ipv4_is_loopback(s) || 2444 ipv4_is_multicast(s) || 2445 ipv4_is_lbcast(s) || 2446 ipv4_is_zeronet(s) || 2447 ipv4_is_local_multicast(s)) { 2448 t = random32() % (imx - imn) + imn; 2449 s = htonl(t); 2450 } 2451 pkt_dev->cur_daddr = s; 2452 } else { 2453 t = ntohl(pkt_dev->cur_daddr); 2454 t++; 2455 if (t > imx) { 2456 t = imn; 2457 } 2458 pkt_dev->cur_daddr = htonl(t); 2459 } 2460 } 2461 if (pkt_dev->cflows) { 2462 pkt_dev->flows[flow].flags |= F_INIT; 2463 pkt_dev->flows[flow].cur_daddr = 2464 pkt_dev->cur_daddr; 2465 #ifdef CONFIG_XFRM 2466 if (pkt_dev->flags & F_IPSEC_ON) 2467 get_ipsec_sa(pkt_dev, flow); 2468 #endif 2469 pkt_dev->nflows++; 2470 } 2471 } 2472 } else { /* IPV6 * */ 2473 2474 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 && 2475 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 && 2476 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 && 2477 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ; 2478 else { 2479 int i; 2480 2481 /* Only random destinations yet */ 2482 2483 for (i = 0; i < 4; i++) { 2484 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2485 (((__force __be32)random32() | 2486 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2487 pkt_dev->max_in6_daddr.s6_addr32[i]); 2488 } 2489 } 2490 } 2491 2492 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2493 __u32 t; 2494 if (pkt_dev->flags & F_TXSIZE_RND) { 2495 t = random32() % 2496 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2497 + pkt_dev->min_pkt_size; 2498 } else { 2499 t = pkt_dev->cur_pkt_size + 1; 2500 if (t > pkt_dev->max_pkt_size) 2501 t = pkt_dev->min_pkt_size; 2502 } 2503 pkt_dev->cur_pkt_size = t; 2504 } 2505 2506 set_cur_queue_map(pkt_dev); 2507 2508 pkt_dev->flows[flow].count++; 2509 } 2510 2511 2512 #ifdef CONFIG_XFRM 2513 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2514 { 2515 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2516 int err = 0; 2517 struct iphdr *iph; 2518 2519 if (!x) 2520 return 0; 2521 /* XXX: we dont support tunnel mode for now until 2522 * we resolve the dst issue */ 2523 if (x->props.mode != XFRM_MODE_TRANSPORT) 2524 return 0; 2525 2526 spin_lock(&x->lock); 2527 iph = ip_hdr(skb); 2528 2529 err = x->outer_mode->output(x, skb); 2530 if (err) 2531 goto error; 2532 err = x->type->output(x, skb); 2533 if (err) 2534 goto error; 2535 2536 x->curlft.bytes += skb->len; 2537 x->curlft.packets++; 2538 error: 2539 spin_unlock(&x->lock); 2540 return err; 2541 } 2542 2543 static void free_SAs(struct pktgen_dev *pkt_dev) 2544 { 2545 if (pkt_dev->cflows) { 2546 /* let go of the SAs if we have them */ 2547 int i; 2548 for (i = 0; i < pkt_dev->cflows; i++) { 2549 struct xfrm_state *x = pkt_dev->flows[i].x; 2550 if (x) { 2551 xfrm_state_put(x); 2552 pkt_dev->flows[i].x = NULL; 2553 } 2554 } 2555 } 2556 } 2557 2558 static int process_ipsec(struct pktgen_dev *pkt_dev, 2559 struct sk_buff *skb, __be16 protocol) 2560 { 2561 if (pkt_dev->flags & F_IPSEC_ON) { 2562 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2563 int nhead = 0; 2564 if (x) { 2565 int ret; 2566 __u8 *eth; 2567 nhead = x->props.header_len - skb_headroom(skb); 2568 if (nhead > 0) { 2569 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2570 if (ret < 0) { 2571 pr_err("Error expanding ipsec packet %d\n", 2572 ret); 2573 goto err; 2574 } 2575 } 2576 2577 /* ipsec is not expecting ll header */ 2578 skb_pull(skb, ETH_HLEN); 2579 ret = pktgen_output_ipsec(skb, pkt_dev); 2580 if (ret) { 2581 pr_err("Error creating ipsec packet %d\n", ret); 2582 goto err; 2583 } 2584 /* restore ll */ 2585 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2586 memcpy(eth, pkt_dev->hh, 12); 2587 *(u16 *) ð[12] = protocol; 2588 } 2589 } 2590 return 1; 2591 err: 2592 kfree_skb(skb); 2593 return 0; 2594 } 2595 #endif 2596 2597 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2598 { 2599 unsigned i; 2600 for (i = 0; i < pkt_dev->nr_labels; i++) 2601 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2602 2603 mpls--; 2604 *mpls |= MPLS_STACK_BOTTOM; 2605 } 2606 2607 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2608 unsigned int prio) 2609 { 2610 return htons(id | (cfi << 12) | (prio << 13)); 2611 } 2612 2613 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb, 2614 int datalen) 2615 { 2616 struct timeval timestamp; 2617 struct pktgen_hdr *pgh; 2618 2619 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh)); 2620 datalen -= sizeof(*pgh); 2621 2622 if (pkt_dev->nfrags <= 0) { 2623 memset(skb_put(skb, datalen), 0, datalen); 2624 } else { 2625 int frags = pkt_dev->nfrags; 2626 int i, len; 2627 2628 2629 if (frags > MAX_SKB_FRAGS) 2630 frags = MAX_SKB_FRAGS; 2631 len = datalen - frags * PAGE_SIZE; 2632 if (len > 0) { 2633 memset(skb_put(skb, len), 0, len); 2634 datalen = frags * PAGE_SIZE; 2635 } 2636 2637 i = 0; 2638 while (datalen > 0) { 2639 if (unlikely(!pkt_dev->page)) { 2640 int node = numa_node_id(); 2641 2642 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE)) 2643 node = pkt_dev->node; 2644 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0); 2645 if (!pkt_dev->page) 2646 break; 2647 } 2648 skb_shinfo(skb)->frags[i].page = pkt_dev->page; 2649 get_page(pkt_dev->page); 2650 skb_shinfo(skb)->frags[i].page_offset = 0; 2651 skb_shinfo(skb)->frags[i].size = 2652 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 2653 datalen -= skb_shinfo(skb)->frags[i].size; 2654 skb->len += skb_shinfo(skb)->frags[i].size; 2655 skb->data_len += skb_shinfo(skb)->frags[i].size; 2656 i++; 2657 skb_shinfo(skb)->nr_frags = i; 2658 } 2659 2660 while (i < frags) { 2661 int rem; 2662 2663 if (i == 0) 2664 break; 2665 2666 rem = skb_shinfo(skb)->frags[i - 1].size / 2; 2667 if (rem == 0) 2668 break; 2669 2670 skb_shinfo(skb)->frags[i - 1].size -= rem; 2671 2672 skb_shinfo(skb)->frags[i] = 2673 skb_shinfo(skb)->frags[i - 1]; 2674 get_page(skb_shinfo(skb)->frags[i].page); 2675 skb_shinfo(skb)->frags[i].page = 2676 skb_shinfo(skb)->frags[i - 1].page; 2677 skb_shinfo(skb)->frags[i].page_offset += 2678 skb_shinfo(skb)->frags[i - 1].size; 2679 skb_shinfo(skb)->frags[i].size = rem; 2680 i++; 2681 skb_shinfo(skb)->nr_frags = i; 2682 } 2683 } 2684 2685 /* Stamp the time, and sequence number, 2686 * convert them to network byte order 2687 */ 2688 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2689 pgh->seq_num = htonl(pkt_dev->seq_num); 2690 2691 do_gettimeofday(×tamp); 2692 pgh->tv_sec = htonl(timestamp.tv_sec); 2693 pgh->tv_usec = htonl(timestamp.tv_usec); 2694 } 2695 2696 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2697 struct pktgen_dev *pkt_dev) 2698 { 2699 struct sk_buff *skb = NULL; 2700 __u8 *eth; 2701 struct udphdr *udph; 2702 int datalen, iplen; 2703 struct iphdr *iph; 2704 __be16 protocol = htons(ETH_P_IP); 2705 __be32 *mpls; 2706 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2707 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2708 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2709 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2710 u16 queue_map; 2711 2712 if (pkt_dev->nr_labels) 2713 protocol = htons(ETH_P_MPLS_UC); 2714 2715 if (pkt_dev->vlan_id != 0xffff) 2716 protocol = htons(ETH_P_8021Q); 2717 2718 /* Update any of the values, used when we're incrementing various 2719 * fields. 2720 */ 2721 mod_cur_headers(pkt_dev); 2722 queue_map = pkt_dev->cur_queue_map; 2723 2724 datalen = (odev->hard_header_len + 16) & ~0xf; 2725 2726 if (pkt_dev->flags & F_NODE) { 2727 int node; 2728 2729 if (pkt_dev->node >= 0) 2730 node = pkt_dev->node; 2731 else 2732 node = numa_node_id(); 2733 2734 skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64 2735 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node); 2736 if (likely(skb)) { 2737 skb_reserve(skb, NET_SKB_PAD); 2738 skb->dev = odev; 2739 } 2740 } 2741 else 2742 skb = __netdev_alloc_skb(odev, 2743 pkt_dev->cur_pkt_size + 64 2744 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT); 2745 2746 if (!skb) { 2747 sprintf(pkt_dev->result, "No memory"); 2748 return NULL; 2749 } 2750 prefetchw(skb->data); 2751 2752 skb_reserve(skb, datalen); 2753 2754 /* Reserve for ethernet and IP header */ 2755 eth = (__u8 *) skb_push(skb, 14); 2756 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2757 if (pkt_dev->nr_labels) 2758 mpls_push(mpls, pkt_dev); 2759 2760 if (pkt_dev->vlan_id != 0xffff) { 2761 if (pkt_dev->svlan_id != 0xffff) { 2762 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2763 *svlan_tci = build_tci(pkt_dev->svlan_id, 2764 pkt_dev->svlan_cfi, 2765 pkt_dev->svlan_p); 2766 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2767 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2768 } 2769 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2770 *vlan_tci = build_tci(pkt_dev->vlan_id, 2771 pkt_dev->vlan_cfi, 2772 pkt_dev->vlan_p); 2773 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2774 *vlan_encapsulated_proto = htons(ETH_P_IP); 2775 } 2776 2777 skb->network_header = skb->tail; 2778 skb->transport_header = skb->network_header + sizeof(struct iphdr); 2779 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr)); 2780 skb_set_queue_mapping(skb, queue_map); 2781 skb->priority = pkt_dev->skb_priority; 2782 2783 iph = ip_hdr(skb); 2784 udph = udp_hdr(skb); 2785 2786 memcpy(eth, pkt_dev->hh, 12); 2787 *(__be16 *) & eth[12] = protocol; 2788 2789 /* Eth + IPh + UDPh + mpls */ 2790 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2791 pkt_dev->pkt_overhead; 2792 if (datalen < sizeof(struct pktgen_hdr)) 2793 datalen = sizeof(struct pktgen_hdr); 2794 2795 udph->source = htons(pkt_dev->cur_udp_src); 2796 udph->dest = htons(pkt_dev->cur_udp_dst); 2797 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2798 udph->check = 0; /* No checksum */ 2799 2800 iph->ihl = 5; 2801 iph->version = 4; 2802 iph->ttl = 32; 2803 iph->tos = pkt_dev->tos; 2804 iph->protocol = IPPROTO_UDP; /* UDP */ 2805 iph->saddr = pkt_dev->cur_saddr; 2806 iph->daddr = pkt_dev->cur_daddr; 2807 iph->id = htons(pkt_dev->ip_id); 2808 pkt_dev->ip_id++; 2809 iph->frag_off = 0; 2810 iplen = 20 + 8 + datalen; 2811 iph->tot_len = htons(iplen); 2812 iph->check = 0; 2813 iph->check = ip_fast_csum((void *)iph, iph->ihl); 2814 skb->protocol = protocol; 2815 skb->mac_header = (skb->network_header - ETH_HLEN - 2816 pkt_dev->pkt_overhead); 2817 skb->dev = odev; 2818 skb->pkt_type = PACKET_HOST; 2819 pktgen_finalize_skb(pkt_dev, skb, datalen); 2820 2821 #ifdef CONFIG_XFRM 2822 if (!process_ipsec(pkt_dev, skb, protocol)) 2823 return NULL; 2824 #endif 2825 2826 return skb; 2827 } 2828 2829 /* 2830 * scan_ip6, fmt_ip taken from dietlibc-0.21 2831 * Author Felix von Leitner <felix-dietlibc@fefe.de> 2832 * 2833 * Slightly modified for kernel. 2834 * Should be candidate for net/ipv4/utils.c 2835 * --ro 2836 */ 2837 2838 static unsigned int scan_ip6(const char *s, char ip[16]) 2839 { 2840 unsigned int i; 2841 unsigned int len = 0; 2842 unsigned long u; 2843 char suffix[16]; 2844 unsigned int prefixlen = 0; 2845 unsigned int suffixlen = 0; 2846 __be32 tmp; 2847 char *pos; 2848 2849 for (i = 0; i < 16; i++) 2850 ip[i] = 0; 2851 2852 for (;;) { 2853 if (*s == ':') { 2854 len++; 2855 if (s[1] == ':') { /* Found "::", skip to part 2 */ 2856 s += 2; 2857 len++; 2858 break; 2859 } 2860 s++; 2861 } 2862 2863 u = simple_strtoul(s, &pos, 16); 2864 i = pos - s; 2865 if (!i) 2866 return 0; 2867 if (prefixlen == 12 && s[i] == '.') { 2868 2869 /* the last 4 bytes may be written as IPv4 address */ 2870 2871 tmp = in_aton(s); 2872 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp)); 2873 return i + len; 2874 } 2875 ip[prefixlen++] = (u >> 8); 2876 ip[prefixlen++] = (u & 255); 2877 s += i; 2878 len += i; 2879 if (prefixlen == 16) 2880 return len; 2881 } 2882 2883 /* part 2, after "::" */ 2884 for (;;) { 2885 if (*s == ':') { 2886 if (suffixlen == 0) 2887 break; 2888 s++; 2889 len++; 2890 } else if (suffixlen != 0) 2891 break; 2892 2893 u = simple_strtol(s, &pos, 16); 2894 i = pos - s; 2895 if (!i) { 2896 if (*s) 2897 len--; 2898 break; 2899 } 2900 if (suffixlen + prefixlen <= 12 && s[i] == '.') { 2901 tmp = in_aton(s); 2902 memcpy((struct in_addr *)(suffix + suffixlen), &tmp, 2903 sizeof(tmp)); 2904 suffixlen += 4; 2905 len += strlen(s); 2906 break; 2907 } 2908 suffix[suffixlen++] = (u >> 8); 2909 suffix[suffixlen++] = (u & 255); 2910 s += i; 2911 len += i; 2912 if (prefixlen + suffixlen == 16) 2913 break; 2914 } 2915 for (i = 0; i < suffixlen; i++) 2916 ip[16 - suffixlen + i] = suffix[i]; 2917 return len; 2918 } 2919 2920 static char tohex(char hexdigit) 2921 { 2922 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0'; 2923 } 2924 2925 static int fmt_xlong(char *s, unsigned int i) 2926 { 2927 char *bak = s; 2928 *s = tohex((i >> 12) & 0xf); 2929 if (s != bak || *s != '0') 2930 ++s; 2931 *s = tohex((i >> 8) & 0xf); 2932 if (s != bak || *s != '0') 2933 ++s; 2934 *s = tohex((i >> 4) & 0xf); 2935 if (s != bak || *s != '0') 2936 ++s; 2937 *s = tohex(i & 0xf); 2938 return s - bak + 1; 2939 } 2940 2941 static unsigned int fmt_ip6(char *s, const char ip[16]) 2942 { 2943 unsigned int len; 2944 unsigned int i; 2945 unsigned int temp; 2946 unsigned int compressing; 2947 int j; 2948 2949 len = 0; 2950 compressing = 0; 2951 for (j = 0; j < 16; j += 2) { 2952 2953 #ifdef V4MAPPEDPREFIX 2954 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) { 2955 inet_ntoa_r(*(struct in_addr *)(ip + 12), s); 2956 temp = strlen(s); 2957 return len + temp; 2958 } 2959 #endif 2960 temp = ((unsigned long)(unsigned char)ip[j] << 8) + 2961 (unsigned long)(unsigned char)ip[j + 1]; 2962 if (temp == 0) { 2963 if (!compressing) { 2964 compressing = 1; 2965 if (j == 0) { 2966 *s++ = ':'; 2967 ++len; 2968 } 2969 } 2970 } else { 2971 if (compressing) { 2972 compressing = 0; 2973 *s++ = ':'; 2974 ++len; 2975 } 2976 i = fmt_xlong(s, temp); 2977 len += i; 2978 s += i; 2979 if (j < 14) { 2980 *s++ = ':'; 2981 ++len; 2982 } 2983 } 2984 } 2985 if (compressing) { 2986 *s++ = ':'; 2987 ++len; 2988 } 2989 *s = 0; 2990 return len; 2991 } 2992 2993 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2994 struct pktgen_dev *pkt_dev) 2995 { 2996 struct sk_buff *skb = NULL; 2997 __u8 *eth; 2998 struct udphdr *udph; 2999 int datalen; 3000 struct ipv6hdr *iph; 3001 __be16 protocol = htons(ETH_P_IPV6); 3002 __be32 *mpls; 3003 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 3004 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 3005 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 3006 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 3007 u16 queue_map; 3008 3009 if (pkt_dev->nr_labels) 3010 protocol = htons(ETH_P_MPLS_UC); 3011 3012 if (pkt_dev->vlan_id != 0xffff) 3013 protocol = htons(ETH_P_8021Q); 3014 3015 /* Update any of the values, used when we're incrementing various 3016 * fields. 3017 */ 3018 mod_cur_headers(pkt_dev); 3019 queue_map = pkt_dev->cur_queue_map; 3020 3021 skb = __netdev_alloc_skb(odev, 3022 pkt_dev->cur_pkt_size + 64 3023 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT); 3024 if (!skb) { 3025 sprintf(pkt_dev->result, "No memory"); 3026 return NULL; 3027 } 3028 prefetchw(skb->data); 3029 3030 skb_reserve(skb, 16); 3031 3032 /* Reserve for ethernet and IP header */ 3033 eth = (__u8 *) skb_push(skb, 14); 3034 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 3035 if (pkt_dev->nr_labels) 3036 mpls_push(mpls, pkt_dev); 3037 3038 if (pkt_dev->vlan_id != 0xffff) { 3039 if (pkt_dev->svlan_id != 0xffff) { 3040 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 3041 *svlan_tci = build_tci(pkt_dev->svlan_id, 3042 pkt_dev->svlan_cfi, 3043 pkt_dev->svlan_p); 3044 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 3045 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 3046 } 3047 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 3048 *vlan_tci = build_tci(pkt_dev->vlan_id, 3049 pkt_dev->vlan_cfi, 3050 pkt_dev->vlan_p); 3051 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 3052 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 3053 } 3054 3055 skb->network_header = skb->tail; 3056 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr); 3057 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr)); 3058 skb_set_queue_mapping(skb, queue_map); 3059 skb->priority = pkt_dev->skb_priority; 3060 iph = ipv6_hdr(skb); 3061 udph = udp_hdr(skb); 3062 3063 memcpy(eth, pkt_dev->hh, 12); 3064 *(__be16 *) ð[12] = protocol; 3065 3066 /* Eth + IPh + UDPh + mpls */ 3067 datalen = pkt_dev->cur_pkt_size - 14 - 3068 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 3069 pkt_dev->pkt_overhead; 3070 3071 if (datalen < sizeof(struct pktgen_hdr)) { 3072 datalen = sizeof(struct pktgen_hdr); 3073 if (net_ratelimit()) 3074 pr_info("increased datalen to %d\n", datalen); 3075 } 3076 3077 udph->source = htons(pkt_dev->cur_udp_src); 3078 udph->dest = htons(pkt_dev->cur_udp_dst); 3079 udph->len = htons(datalen + sizeof(struct udphdr)); 3080 udph->check = 0; /* No checksum */ 3081 3082 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 3083 3084 if (pkt_dev->traffic_class) { 3085 /* Version + traffic class + flow (0) */ 3086 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 3087 } 3088 3089 iph->hop_limit = 32; 3090 3091 iph->payload_len = htons(sizeof(struct udphdr) + datalen); 3092 iph->nexthdr = IPPROTO_UDP; 3093 3094 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr); 3095 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr); 3096 3097 skb->mac_header = (skb->network_header - ETH_HLEN - 3098 pkt_dev->pkt_overhead); 3099 skb->protocol = protocol; 3100 skb->dev = odev; 3101 skb->pkt_type = PACKET_HOST; 3102 3103 pktgen_finalize_skb(pkt_dev, skb, datalen); 3104 3105 return skb; 3106 } 3107 3108 static struct sk_buff *fill_packet(struct net_device *odev, 3109 struct pktgen_dev *pkt_dev) 3110 { 3111 if (pkt_dev->flags & F_IPV6) 3112 return fill_packet_ipv6(odev, pkt_dev); 3113 else 3114 return fill_packet_ipv4(odev, pkt_dev); 3115 } 3116 3117 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 3118 { 3119 pkt_dev->seq_num = 1; 3120 pkt_dev->idle_acc = 0; 3121 pkt_dev->sofar = 0; 3122 pkt_dev->tx_bytes = 0; 3123 pkt_dev->errors = 0; 3124 } 3125 3126 /* Set up structure for sending pkts, clear counters */ 3127 3128 static void pktgen_run(struct pktgen_thread *t) 3129 { 3130 struct pktgen_dev *pkt_dev; 3131 int started = 0; 3132 3133 func_enter(); 3134 3135 if_lock(t); 3136 list_for_each_entry(pkt_dev, &t->if_list, list) { 3137 3138 /* 3139 * setup odev and create initial packet. 3140 */ 3141 pktgen_setup_inject(pkt_dev); 3142 3143 if (pkt_dev->odev) { 3144 pktgen_clear_counters(pkt_dev); 3145 pkt_dev->running = 1; /* Cranke yeself! */ 3146 pkt_dev->skb = NULL; 3147 pkt_dev->started_at = 3148 pkt_dev->next_tx = ktime_now(); 3149 3150 set_pkt_overhead(pkt_dev); 3151 3152 strcpy(pkt_dev->result, "Starting"); 3153 started++; 3154 } else 3155 strcpy(pkt_dev->result, "Error starting"); 3156 } 3157 if_unlock(t); 3158 if (started) 3159 t->control &= ~(T_STOP); 3160 } 3161 3162 static void pktgen_stop_all_threads_ifs(void) 3163 { 3164 struct pktgen_thread *t; 3165 3166 func_enter(); 3167 3168 mutex_lock(&pktgen_thread_lock); 3169 3170 list_for_each_entry(t, &pktgen_threads, th_list) 3171 t->control |= T_STOP; 3172 3173 mutex_unlock(&pktgen_thread_lock); 3174 } 3175 3176 static int thread_is_running(const struct pktgen_thread *t) 3177 { 3178 const struct pktgen_dev *pkt_dev; 3179 3180 list_for_each_entry(pkt_dev, &t->if_list, list) 3181 if (pkt_dev->running) 3182 return 1; 3183 return 0; 3184 } 3185 3186 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3187 { 3188 if_lock(t); 3189 3190 while (thread_is_running(t)) { 3191 3192 if_unlock(t); 3193 3194 msleep_interruptible(100); 3195 3196 if (signal_pending(current)) 3197 goto signal; 3198 if_lock(t); 3199 } 3200 if_unlock(t); 3201 return 1; 3202 signal: 3203 return 0; 3204 } 3205 3206 static int pktgen_wait_all_threads_run(void) 3207 { 3208 struct pktgen_thread *t; 3209 int sig = 1; 3210 3211 mutex_lock(&pktgen_thread_lock); 3212 3213 list_for_each_entry(t, &pktgen_threads, th_list) { 3214 sig = pktgen_wait_thread_run(t); 3215 if (sig == 0) 3216 break; 3217 } 3218 3219 if (sig == 0) 3220 list_for_each_entry(t, &pktgen_threads, th_list) 3221 t->control |= (T_STOP); 3222 3223 mutex_unlock(&pktgen_thread_lock); 3224 return sig; 3225 } 3226 3227 static void pktgen_run_all_threads(void) 3228 { 3229 struct pktgen_thread *t; 3230 3231 func_enter(); 3232 3233 mutex_lock(&pktgen_thread_lock); 3234 3235 list_for_each_entry(t, &pktgen_threads, th_list) 3236 t->control |= (T_RUN); 3237 3238 mutex_unlock(&pktgen_thread_lock); 3239 3240 /* Propagate thread->control */ 3241 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3242 3243 pktgen_wait_all_threads_run(); 3244 } 3245 3246 static void pktgen_reset_all_threads(void) 3247 { 3248 struct pktgen_thread *t; 3249 3250 func_enter(); 3251 3252 mutex_lock(&pktgen_thread_lock); 3253 3254 list_for_each_entry(t, &pktgen_threads, th_list) 3255 t->control |= (T_REMDEVALL); 3256 3257 mutex_unlock(&pktgen_thread_lock); 3258 3259 /* Propagate thread->control */ 3260 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3261 3262 pktgen_wait_all_threads_run(); 3263 } 3264 3265 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3266 { 3267 __u64 bps, mbps, pps; 3268 char *p = pkt_dev->result; 3269 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3270 pkt_dev->started_at); 3271 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3272 3273 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", 3274 (unsigned long long)ktime_to_us(elapsed), 3275 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3276 (unsigned long long)ktime_to_us(idle), 3277 (unsigned long long)pkt_dev->sofar, 3278 pkt_dev->cur_pkt_size, nr_frags); 3279 3280 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3281 ktime_to_ns(elapsed)); 3282 3283 bps = pps * 8 * pkt_dev->cur_pkt_size; 3284 3285 mbps = bps; 3286 do_div(mbps, 1000000); 3287 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3288 (unsigned long long)pps, 3289 (unsigned long long)mbps, 3290 (unsigned long long)bps, 3291 (unsigned long long)pkt_dev->errors); 3292 } 3293 3294 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3295 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3296 { 3297 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3298 3299 if (!pkt_dev->running) { 3300 pr_warning("interface: %s is already stopped\n", 3301 pkt_dev->odevname); 3302 return -EINVAL; 3303 } 3304 3305 kfree_skb(pkt_dev->skb); 3306 pkt_dev->skb = NULL; 3307 pkt_dev->stopped_at = ktime_now(); 3308 pkt_dev->running = 0; 3309 3310 show_results(pkt_dev, nr_frags); 3311 3312 return 0; 3313 } 3314 3315 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3316 { 3317 struct pktgen_dev *pkt_dev, *best = NULL; 3318 3319 if_lock(t); 3320 3321 list_for_each_entry(pkt_dev, &t->if_list, list) { 3322 if (!pkt_dev->running) 3323 continue; 3324 if (best == NULL) 3325 best = pkt_dev; 3326 else if (ktime_lt(pkt_dev->next_tx, best->next_tx)) 3327 best = pkt_dev; 3328 } 3329 if_unlock(t); 3330 return best; 3331 } 3332 3333 static void pktgen_stop(struct pktgen_thread *t) 3334 { 3335 struct pktgen_dev *pkt_dev; 3336 3337 func_enter(); 3338 3339 if_lock(t); 3340 3341 list_for_each_entry(pkt_dev, &t->if_list, list) { 3342 pktgen_stop_device(pkt_dev); 3343 } 3344 3345 if_unlock(t); 3346 } 3347 3348 /* 3349 * one of our devices needs to be removed - find it 3350 * and remove it 3351 */ 3352 static void pktgen_rem_one_if(struct pktgen_thread *t) 3353 { 3354 struct list_head *q, *n; 3355 struct pktgen_dev *cur; 3356 3357 func_enter(); 3358 3359 if_lock(t); 3360 3361 list_for_each_safe(q, n, &t->if_list) { 3362 cur = list_entry(q, struct pktgen_dev, list); 3363 3364 if (!cur->removal_mark) 3365 continue; 3366 3367 kfree_skb(cur->skb); 3368 cur->skb = NULL; 3369 3370 pktgen_remove_device(t, cur); 3371 3372 break; 3373 } 3374 3375 if_unlock(t); 3376 } 3377 3378 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3379 { 3380 struct list_head *q, *n; 3381 struct pktgen_dev *cur; 3382 3383 func_enter(); 3384 3385 /* Remove all devices, free mem */ 3386 3387 if_lock(t); 3388 3389 list_for_each_safe(q, n, &t->if_list) { 3390 cur = list_entry(q, struct pktgen_dev, list); 3391 3392 kfree_skb(cur->skb); 3393 cur->skb = NULL; 3394 3395 pktgen_remove_device(t, cur); 3396 } 3397 3398 if_unlock(t); 3399 } 3400 3401 static void pktgen_rem_thread(struct pktgen_thread *t) 3402 { 3403 /* Remove from the thread list */ 3404 3405 remove_proc_entry(t->tsk->comm, pg_proc_dir); 3406 3407 } 3408 3409 static void pktgen_resched(struct pktgen_dev *pkt_dev) 3410 { 3411 ktime_t idle_start = ktime_now(); 3412 schedule(); 3413 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3414 } 3415 3416 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) 3417 { 3418 ktime_t idle_start = ktime_now(); 3419 3420 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3421 if (signal_pending(current)) 3422 break; 3423 3424 if (need_resched()) 3425 pktgen_resched(pkt_dev); 3426 else 3427 cpu_relax(); 3428 } 3429 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3430 } 3431 3432 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3433 { 3434 struct net_device *odev = pkt_dev->odev; 3435 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *) 3436 = odev->netdev_ops->ndo_start_xmit; 3437 struct netdev_queue *txq; 3438 u16 queue_map; 3439 int ret; 3440 3441 /* If device is offline, then don't send */ 3442 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { 3443 pktgen_stop_device(pkt_dev); 3444 return; 3445 } 3446 3447 /* This is max DELAY, this has special meaning of 3448 * "never transmit" 3449 */ 3450 if (unlikely(pkt_dev->delay == ULLONG_MAX)) { 3451 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX); 3452 return; 3453 } 3454 3455 /* If no skb or clone count exhausted then get new one */ 3456 if (!pkt_dev->skb || (pkt_dev->last_ok && 3457 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { 3458 /* build a new pkt */ 3459 kfree_skb(pkt_dev->skb); 3460 3461 pkt_dev->skb = fill_packet(odev, pkt_dev); 3462 if (pkt_dev->skb == NULL) { 3463 pr_err("ERROR: couldn't allocate skb in fill_packet\n"); 3464 schedule(); 3465 pkt_dev->clone_count--; /* back out increment, OOM */ 3466 return; 3467 } 3468 pkt_dev->last_pkt_size = pkt_dev->skb->len; 3469 pkt_dev->allocated_skbs++; 3470 pkt_dev->clone_count = 0; /* reset counter */ 3471 } 3472 3473 if (pkt_dev->delay && pkt_dev->last_ok) 3474 spin(pkt_dev, pkt_dev->next_tx); 3475 3476 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3477 txq = netdev_get_tx_queue(odev, queue_map); 3478 3479 __netif_tx_lock_bh(txq); 3480 3481 if (unlikely(netif_tx_queue_frozen_or_stopped(txq))) { 3482 ret = NETDEV_TX_BUSY; 3483 pkt_dev->last_ok = 0; 3484 goto unlock; 3485 } 3486 atomic_inc(&(pkt_dev->skb->users)); 3487 ret = (*xmit)(pkt_dev->skb, odev); 3488 3489 switch (ret) { 3490 case NETDEV_TX_OK: 3491 txq_trans_update(txq); 3492 pkt_dev->last_ok = 1; 3493 pkt_dev->sofar++; 3494 pkt_dev->seq_num++; 3495 pkt_dev->tx_bytes += pkt_dev->last_pkt_size; 3496 break; 3497 case NET_XMIT_DROP: 3498 case NET_XMIT_CN: 3499 case NET_XMIT_POLICED: 3500 /* skb has been consumed */ 3501 pkt_dev->errors++; 3502 break; 3503 default: /* Drivers are not supposed to return other values! */ 3504 if (net_ratelimit()) 3505 pr_info("%s xmit error: %d\n", pkt_dev->odevname, ret); 3506 pkt_dev->errors++; 3507 /* fallthru */ 3508 case NETDEV_TX_LOCKED: 3509 case NETDEV_TX_BUSY: 3510 /* Retry it next time */ 3511 atomic_dec(&(pkt_dev->skb->users)); 3512 pkt_dev->last_ok = 0; 3513 } 3514 unlock: 3515 __netif_tx_unlock_bh(txq); 3516 3517 /* If pkt_dev->count is zero, then run forever */ 3518 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3519 pktgen_wait_for_skb(pkt_dev); 3520 3521 /* Done with this */ 3522 pktgen_stop_device(pkt_dev); 3523 } 3524 } 3525 3526 /* 3527 * Main loop of the thread goes here 3528 */ 3529 3530 static int pktgen_thread_worker(void *arg) 3531 { 3532 DEFINE_WAIT(wait); 3533 struct pktgen_thread *t = arg; 3534 struct pktgen_dev *pkt_dev = NULL; 3535 int cpu = t->cpu; 3536 3537 BUG_ON(smp_processor_id() != cpu); 3538 3539 init_waitqueue_head(&t->queue); 3540 complete(&t->start_done); 3541 3542 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); 3543 3544 set_current_state(TASK_INTERRUPTIBLE); 3545 3546 set_freezable(); 3547 3548 while (!kthread_should_stop()) { 3549 pkt_dev = next_to_run(t); 3550 3551 if (unlikely(!pkt_dev && t->control == 0)) { 3552 if (pktgen_exiting) 3553 break; 3554 wait_event_interruptible_timeout(t->queue, 3555 t->control != 0, 3556 HZ/10); 3557 try_to_freeze(); 3558 continue; 3559 } 3560 3561 __set_current_state(TASK_RUNNING); 3562 3563 if (likely(pkt_dev)) { 3564 pktgen_xmit(pkt_dev); 3565 3566 if (need_resched()) 3567 pktgen_resched(pkt_dev); 3568 else 3569 cpu_relax(); 3570 } 3571 3572 if (t->control & T_STOP) { 3573 pktgen_stop(t); 3574 t->control &= ~(T_STOP); 3575 } 3576 3577 if (t->control & T_RUN) { 3578 pktgen_run(t); 3579 t->control &= ~(T_RUN); 3580 } 3581 3582 if (t->control & T_REMDEVALL) { 3583 pktgen_rem_all_ifs(t); 3584 t->control &= ~(T_REMDEVALL); 3585 } 3586 3587 if (t->control & T_REMDEV) { 3588 pktgen_rem_one_if(t); 3589 t->control &= ~(T_REMDEV); 3590 } 3591 3592 try_to_freeze(); 3593 3594 set_current_state(TASK_INTERRUPTIBLE); 3595 } 3596 3597 pr_debug("%s stopping all device\n", t->tsk->comm); 3598 pktgen_stop(t); 3599 3600 pr_debug("%s removing all device\n", t->tsk->comm); 3601 pktgen_rem_all_ifs(t); 3602 3603 pr_debug("%s removing thread\n", t->tsk->comm); 3604 pktgen_rem_thread(t); 3605 3606 /* Wait for kthread_stop */ 3607 while (!kthread_should_stop()) { 3608 set_current_state(TASK_INTERRUPTIBLE); 3609 schedule(); 3610 } 3611 __set_current_state(TASK_RUNNING); 3612 3613 return 0; 3614 } 3615 3616 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3617 const char *ifname, bool exact) 3618 { 3619 struct pktgen_dev *p, *pkt_dev = NULL; 3620 size_t len = strlen(ifname); 3621 3622 if_lock(t); 3623 list_for_each_entry(p, &t->if_list, list) 3624 if (strncmp(p->odevname, ifname, len) == 0) { 3625 if (p->odevname[len]) { 3626 if (exact || p->odevname[len] != '@') 3627 continue; 3628 } 3629 pkt_dev = p; 3630 break; 3631 } 3632 3633 if_unlock(t); 3634 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev); 3635 return pkt_dev; 3636 } 3637 3638 /* 3639 * Adds a dev at front of if_list. 3640 */ 3641 3642 static int add_dev_to_thread(struct pktgen_thread *t, 3643 struct pktgen_dev *pkt_dev) 3644 { 3645 int rv = 0; 3646 3647 if_lock(t); 3648 3649 if (pkt_dev->pg_thread) { 3650 pr_err("ERROR: already assigned to a thread\n"); 3651 rv = -EBUSY; 3652 goto out; 3653 } 3654 3655 list_add(&pkt_dev->list, &t->if_list); 3656 pkt_dev->pg_thread = t; 3657 pkt_dev->running = 0; 3658 3659 out: 3660 if_unlock(t); 3661 return rv; 3662 } 3663 3664 /* Called under thread lock */ 3665 3666 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3667 { 3668 struct pktgen_dev *pkt_dev; 3669 int err; 3670 int node = cpu_to_node(t->cpu); 3671 3672 /* We don't allow a device to be on several threads */ 3673 3674 pkt_dev = __pktgen_NN_threads(ifname, FIND); 3675 if (pkt_dev) { 3676 pr_err("ERROR: interface already used\n"); 3677 return -EBUSY; 3678 } 3679 3680 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); 3681 if (!pkt_dev) 3682 return -ENOMEM; 3683 3684 strcpy(pkt_dev->odevname, ifname); 3685 pkt_dev->flows = vmalloc_node(MAX_CFLOWS * sizeof(struct flow_state), 3686 node); 3687 if (pkt_dev->flows == NULL) { 3688 kfree(pkt_dev); 3689 return -ENOMEM; 3690 } 3691 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state)); 3692 3693 pkt_dev->removal_mark = 0; 3694 pkt_dev->min_pkt_size = ETH_ZLEN; 3695 pkt_dev->max_pkt_size = ETH_ZLEN; 3696 pkt_dev->nfrags = 0; 3697 pkt_dev->clone_skb = pg_clone_skb_d; 3698 pkt_dev->delay = pg_delay_d; 3699 pkt_dev->count = pg_count_d; 3700 pkt_dev->sofar = 0; 3701 pkt_dev->udp_src_min = 9; /* sink port */ 3702 pkt_dev->udp_src_max = 9; 3703 pkt_dev->udp_dst_min = 9; 3704 pkt_dev->udp_dst_max = 9; 3705 3706 pkt_dev->vlan_p = 0; 3707 pkt_dev->vlan_cfi = 0; 3708 pkt_dev->vlan_id = 0xffff; 3709 pkt_dev->svlan_p = 0; 3710 pkt_dev->svlan_cfi = 0; 3711 pkt_dev->svlan_id = 0xffff; 3712 pkt_dev->node = -1; 3713 3714 err = pktgen_setup_dev(pkt_dev, ifname); 3715 if (err) 3716 goto out1; 3717 3718 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir, 3719 &pktgen_if_fops, pkt_dev); 3720 if (!pkt_dev->entry) { 3721 pr_err("cannot create %s/%s procfs entry\n", 3722 PG_PROC_DIR, ifname); 3723 err = -EINVAL; 3724 goto out2; 3725 } 3726 #ifdef CONFIG_XFRM 3727 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3728 pkt_dev->ipsproto = IPPROTO_ESP; 3729 #endif 3730 3731 return add_dev_to_thread(t, pkt_dev); 3732 out2: 3733 dev_put(pkt_dev->odev); 3734 out1: 3735 #ifdef CONFIG_XFRM 3736 free_SAs(pkt_dev); 3737 #endif 3738 vfree(pkt_dev->flows); 3739 kfree(pkt_dev); 3740 return err; 3741 } 3742 3743 static int __init pktgen_create_thread(int cpu) 3744 { 3745 struct pktgen_thread *t; 3746 struct proc_dir_entry *pe; 3747 struct task_struct *p; 3748 3749 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL, 3750 cpu_to_node(cpu)); 3751 if (!t) { 3752 pr_err("ERROR: out of memory, can't create new thread\n"); 3753 return -ENOMEM; 3754 } 3755 3756 spin_lock_init(&t->if_lock); 3757 t->cpu = cpu; 3758 3759 INIT_LIST_HEAD(&t->if_list); 3760 3761 list_add_tail(&t->th_list, &pktgen_threads); 3762 init_completion(&t->start_done); 3763 3764 p = kthread_create_on_node(pktgen_thread_worker, 3765 t, 3766 cpu_to_node(cpu), 3767 "kpktgend_%d", cpu); 3768 if (IS_ERR(p)) { 3769 pr_err("kernel_thread() failed for cpu %d\n", t->cpu); 3770 list_del(&t->th_list); 3771 kfree(t); 3772 return PTR_ERR(p); 3773 } 3774 kthread_bind(p, cpu); 3775 t->tsk = p; 3776 3777 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir, 3778 &pktgen_thread_fops, t); 3779 if (!pe) { 3780 pr_err("cannot create %s/%s procfs entry\n", 3781 PG_PROC_DIR, t->tsk->comm); 3782 kthread_stop(p); 3783 list_del(&t->th_list); 3784 kfree(t); 3785 return -EINVAL; 3786 } 3787 3788 wake_up_process(p); 3789 wait_for_completion(&t->start_done); 3790 3791 return 0; 3792 } 3793 3794 /* 3795 * Removes a device from the thread if_list. 3796 */ 3797 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3798 struct pktgen_dev *pkt_dev) 3799 { 3800 struct list_head *q, *n; 3801 struct pktgen_dev *p; 3802 3803 list_for_each_safe(q, n, &t->if_list) { 3804 p = list_entry(q, struct pktgen_dev, list); 3805 if (p == pkt_dev) 3806 list_del(&p->list); 3807 } 3808 } 3809 3810 static int pktgen_remove_device(struct pktgen_thread *t, 3811 struct pktgen_dev *pkt_dev) 3812 { 3813 3814 pr_debug("remove_device pkt_dev=%p\n", pkt_dev); 3815 3816 if (pkt_dev->running) { 3817 pr_warning("WARNING: trying to remove a running interface, stopping it now\n"); 3818 pktgen_stop_device(pkt_dev); 3819 } 3820 3821 /* Dis-associate from the interface */ 3822 3823 if (pkt_dev->odev) { 3824 dev_put(pkt_dev->odev); 3825 pkt_dev->odev = NULL; 3826 } 3827 3828 /* And update the thread if_list */ 3829 3830 _rem_dev_from_if_list(t, pkt_dev); 3831 3832 if (pkt_dev->entry) 3833 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 3834 3835 #ifdef CONFIG_XFRM 3836 free_SAs(pkt_dev); 3837 #endif 3838 vfree(pkt_dev->flows); 3839 if (pkt_dev->page) 3840 put_page(pkt_dev->page); 3841 kfree(pkt_dev); 3842 return 0; 3843 } 3844 3845 static int __init pg_init(void) 3846 { 3847 int cpu; 3848 struct proc_dir_entry *pe; 3849 3850 pr_info("%s", version); 3851 3852 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net); 3853 if (!pg_proc_dir) 3854 return -ENODEV; 3855 3856 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops); 3857 if (pe == NULL) { 3858 pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL); 3859 proc_net_remove(&init_net, PG_PROC_DIR); 3860 return -EINVAL; 3861 } 3862 3863 /* Register us to receive netdevice events */ 3864 register_netdevice_notifier(&pktgen_notifier_block); 3865 3866 for_each_online_cpu(cpu) { 3867 int err; 3868 3869 err = pktgen_create_thread(cpu); 3870 if (err) 3871 pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n", 3872 cpu, err); 3873 } 3874 3875 if (list_empty(&pktgen_threads)) { 3876 pr_err("ERROR: Initialization failed for all threads\n"); 3877 unregister_netdevice_notifier(&pktgen_notifier_block); 3878 remove_proc_entry(PGCTRL, pg_proc_dir); 3879 proc_net_remove(&init_net, PG_PROC_DIR); 3880 return -ENODEV; 3881 } 3882 3883 return 0; 3884 } 3885 3886 static void __exit pg_cleanup(void) 3887 { 3888 struct pktgen_thread *t; 3889 struct list_head *q, *n; 3890 3891 /* Stop all interfaces & threads */ 3892 pktgen_exiting = true; 3893 3894 list_for_each_safe(q, n, &pktgen_threads) { 3895 t = list_entry(q, struct pktgen_thread, th_list); 3896 kthread_stop(t->tsk); 3897 kfree(t); 3898 } 3899 3900 /* Un-register us from receiving netdevice events */ 3901 unregister_netdevice_notifier(&pktgen_notifier_block); 3902 3903 /* Clean up proc file system */ 3904 remove_proc_entry(PGCTRL, pg_proc_dir); 3905 proc_net_remove(&init_net, PG_PROC_DIR); 3906 } 3907 3908 module_init(pg_init); 3909 module_exit(pg_cleanup); 3910 3911 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); 3912 MODULE_DESCRIPTION("Packet Generator tool"); 3913 MODULE_LICENSE("GPL"); 3914 MODULE_VERSION(VERSION); 3915 module_param(pg_count_d, int, 0); 3916 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); 3917 module_param(pg_delay_d, int, 0); 3918 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); 3919 module_param(pg_clone_skb_d, int, 0); 3920 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); 3921 module_param(debug, int, 0); 3922 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); 3923