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 <linux/prefetch.h> 160 #include <net/net_namespace.h> 161 #include <net/checksum.h> 162 #include <net/ipv6.h> 163 #include <net/addrconf.h> 164 #ifdef CONFIG_XFRM 165 #include <net/xfrm.h> 166 #endif 167 #include <asm/byteorder.h> 168 #include <linux/rcupdate.h> 169 #include <linux/bitops.h> 170 #include <linux/io.h> 171 #include <linux/timex.h> 172 #include <linux/uaccess.h> 173 #include <asm/dma.h> 174 #include <asm/div64.h> /* do_div */ 175 176 #define VERSION "2.74" 177 #define IP_NAME_SZ 32 178 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */ 179 #define MPLS_STACK_BOTTOM htonl(0x00000100) 180 181 #define func_enter() pr_debug("entering %s\n", __func__); 182 183 /* Device flag bits */ 184 #define F_IPSRC_RND (1<<0) /* IP-Src Random */ 185 #define F_IPDST_RND (1<<1) /* IP-Dst Random */ 186 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */ 187 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */ 188 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */ 189 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */ 190 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */ 191 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */ 192 #define F_MPLS_RND (1<<8) /* Random MPLS labels */ 193 #define F_VID_RND (1<<9) /* Random VLAN ID */ 194 #define F_SVID_RND (1<<10) /* Random SVLAN ID */ 195 #define F_FLOW_SEQ (1<<11) /* Sequential flows */ 196 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */ 197 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */ 198 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */ 199 #define F_NODE (1<<15) /* Node memory alloc*/ 200 201 /* Thread control flag bits */ 202 #define T_STOP (1<<0) /* Stop run */ 203 #define T_RUN (1<<1) /* Start run */ 204 #define T_REMDEVALL (1<<2) /* Remove all devs */ 205 #define T_REMDEV (1<<3) /* Remove one dev */ 206 207 /* If lock -- can be removed after some work */ 208 #define if_lock(t) spin_lock(&(t->if_lock)); 209 #define if_unlock(t) spin_unlock(&(t->if_lock)); 210 211 /* Used to help with determining the pkts on receive */ 212 #define PKTGEN_MAGIC 0xbe9be955 213 #define PG_PROC_DIR "pktgen" 214 #define PGCTRL "pgctrl" 215 static struct proc_dir_entry *pg_proc_dir; 216 217 #define MAX_CFLOWS 65536 218 219 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4) 220 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4) 221 222 struct flow_state { 223 __be32 cur_daddr; 224 int count; 225 #ifdef CONFIG_XFRM 226 struct xfrm_state *x; 227 #endif 228 __u32 flags; 229 }; 230 231 /* flow flag bits */ 232 #define F_INIT (1<<0) /* flow has been initialized */ 233 234 struct pktgen_dev { 235 /* 236 * Try to keep frequent/infrequent used vars. separated. 237 */ 238 struct proc_dir_entry *entry; /* proc file */ 239 struct pktgen_thread *pg_thread;/* the owner */ 240 struct list_head list; /* chaining in the thread's run-queue */ 241 242 int running; /* if false, the test will stop */ 243 244 /* If min != max, then we will either do a linear iteration, or 245 * we will do a random selection from within the range. 246 */ 247 __u32 flags; 248 int removal_mark; /* non-zero => the device is marked for 249 * removal by worker thread */ 250 251 int min_pkt_size; /* = ETH_ZLEN; */ 252 int max_pkt_size; /* = ETH_ZLEN; */ 253 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */ 254 int nfrags; 255 struct page *page; 256 u64 delay; /* nano-seconds */ 257 258 __u64 count; /* Default No packets to send */ 259 __u64 sofar; /* How many pkts we've sent so far */ 260 __u64 tx_bytes; /* How many bytes we've transmitted */ 261 __u64 errors; /* Errors when trying to transmit, */ 262 263 /* runtime counters relating to clone_skb */ 264 265 __u64 allocated_skbs; 266 __u32 clone_count; 267 int last_ok; /* Was last skb sent? 268 * Or a failed transmit of some sort? 269 * This will keep sequence numbers in order 270 */ 271 ktime_t next_tx; 272 ktime_t started_at; 273 ktime_t stopped_at; 274 u64 idle_acc; /* nano-seconds */ 275 276 __u32 seq_num; 277 278 int clone_skb; /* 279 * Use multiple SKBs during packet gen. 280 * If this number is greater than 1, then 281 * that many copies of the same packet will be 282 * sent before a new packet is allocated. 283 * If you want to send 1024 identical packets 284 * before creating a new packet, 285 * set clone_skb to 1024. 286 */ 287 288 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 289 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 290 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 291 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 292 293 struct in6_addr in6_saddr; 294 struct in6_addr in6_daddr; 295 struct in6_addr cur_in6_daddr; 296 struct in6_addr cur_in6_saddr; 297 /* For ranges */ 298 struct in6_addr min_in6_daddr; 299 struct in6_addr max_in6_daddr; 300 struct in6_addr min_in6_saddr; 301 struct in6_addr max_in6_saddr; 302 303 /* If we're doing ranges, random or incremental, then this 304 * defines the min/max for those ranges. 305 */ 306 __be32 saddr_min; /* inclusive, source IP address */ 307 __be32 saddr_max; /* exclusive, source IP address */ 308 __be32 daddr_min; /* inclusive, dest IP address */ 309 __be32 daddr_max; /* exclusive, dest IP address */ 310 311 __u16 udp_src_min; /* inclusive, source UDP port */ 312 __u16 udp_src_max; /* exclusive, source UDP port */ 313 __u16 udp_dst_min; /* inclusive, dest UDP port */ 314 __u16 udp_dst_max; /* exclusive, dest UDP port */ 315 316 /* DSCP + ECN */ 317 __u8 tos; /* six MSB of (former) IPv4 TOS 318 are for dscp codepoint */ 319 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 320 (see RFC 3260, sec. 4) */ 321 322 /* MPLS */ 323 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */ 324 __be32 labels[MAX_MPLS_LABELS]; 325 326 /* VLAN/SVLAN (802.1Q/Q-in-Q) */ 327 __u8 vlan_p; 328 __u8 vlan_cfi; 329 __u16 vlan_id; /* 0xffff means no vlan tag */ 330 331 __u8 svlan_p; 332 __u8 svlan_cfi; 333 __u16 svlan_id; /* 0xffff means no svlan tag */ 334 335 __u32 src_mac_count; /* How many MACs to iterate through */ 336 __u32 dst_mac_count; /* How many MACs to iterate through */ 337 338 unsigned char dst_mac[ETH_ALEN]; 339 unsigned char src_mac[ETH_ALEN]; 340 341 __u32 cur_dst_mac_offset; 342 __u32 cur_src_mac_offset; 343 __be32 cur_saddr; 344 __be32 cur_daddr; 345 __u16 ip_id; 346 __u16 cur_udp_dst; 347 __u16 cur_udp_src; 348 __u16 cur_queue_map; 349 __u32 cur_pkt_size; 350 __u32 last_pkt_size; 351 352 __u8 hh[14]; 353 /* = { 354 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, 355 356 We fill in SRC address later 357 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 358 0x08, 0x00 359 }; 360 */ 361 __u16 pad; /* pad out the hh struct to an even 16 bytes */ 362 363 struct sk_buff *skb; /* skb we are to transmit next, used for when we 364 * are transmitting the same one multiple times 365 */ 366 struct net_device *odev; /* The out-going device. 367 * Note that the device should have it's 368 * pg_info pointer pointing back to this 369 * device. 370 * Set when the user specifies the out-going 371 * device name (not when the inject is 372 * started as it used to do.) 373 */ 374 char odevname[32]; 375 struct flow_state *flows; 376 unsigned cflows; /* Concurrent flows (config) */ 377 unsigned lflow; /* Flow length (config) */ 378 unsigned nflows; /* accumulated flows (stats) */ 379 unsigned curfl; /* current sequenced flow (state)*/ 380 381 u16 queue_map_min; 382 u16 queue_map_max; 383 __u32 skb_priority; /* skb priority field */ 384 int node; /* Memory node */ 385 386 #ifdef CONFIG_XFRM 387 __u8 ipsmode; /* IPSEC mode (config) */ 388 __u8 ipsproto; /* IPSEC type (config) */ 389 #endif 390 char result[512]; 391 }; 392 393 struct pktgen_hdr { 394 __be32 pgh_magic; 395 __be32 seq_num; 396 __be32 tv_sec; 397 __be32 tv_usec; 398 }; 399 400 static bool pktgen_exiting __read_mostly; 401 402 struct pktgen_thread { 403 spinlock_t if_lock; /* for list of devices */ 404 struct list_head if_list; /* All device here */ 405 struct list_head th_list; 406 struct task_struct *tsk; 407 char result[512]; 408 409 /* Field for thread to receive "posted" events terminate, 410 stop ifs etc. */ 411 412 u32 control; 413 int cpu; 414 415 wait_queue_head_t queue; 416 struct completion start_done; 417 }; 418 419 #define REMOVE 1 420 #define FIND 0 421 422 static inline ktime_t ktime_now(void) 423 { 424 struct timespec ts; 425 ktime_get_ts(&ts); 426 427 return timespec_to_ktime(ts); 428 } 429 430 /* This works even if 32 bit because of careful byte order choice */ 431 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2) 432 { 433 return cmp1.tv64 < cmp2.tv64; 434 } 435 436 static const char version[] = 437 "Packet Generator for packet performance testing. " 438 "Version: " VERSION "\n"; 439 440 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i); 441 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname); 442 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 443 const char *ifname, bool exact); 444 static int pktgen_device_event(struct notifier_block *, unsigned long, void *); 445 static void pktgen_run_all_threads(void); 446 static void pktgen_reset_all_threads(void); 447 static void pktgen_stop_all_threads_ifs(void); 448 449 static void pktgen_stop(struct pktgen_thread *t); 450 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); 451 452 static unsigned int scan_ip6(const char *s, 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 seq_printf(seq, 560 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n" 561 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n", 562 &pkt_dev->in6_saddr, 563 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr, 564 &pkt_dev->in6_daddr, 565 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr); 566 } else { 567 seq_printf(seq, 568 " dst_min: %s dst_max: %s\n", 569 pkt_dev->dst_min, pkt_dev->dst_max); 570 seq_printf(seq, 571 " src_min: %s src_max: %s\n", 572 pkt_dev->src_min, pkt_dev->src_max); 573 } 574 575 seq_puts(seq, " src_mac: "); 576 577 seq_printf(seq, "%pM ", 578 is_zero_ether_addr(pkt_dev->src_mac) ? 579 pkt_dev->odev->dev_addr : pkt_dev->src_mac); 580 581 seq_printf(seq, "dst_mac: "); 582 seq_printf(seq, "%pM\n", pkt_dev->dst_mac); 583 584 seq_printf(seq, 585 " udp_src_min: %d udp_src_max: %d" 586 " udp_dst_min: %d udp_dst_max: %d\n", 587 pkt_dev->udp_src_min, pkt_dev->udp_src_max, 588 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); 589 590 seq_printf(seq, 591 " src_mac_count: %d dst_mac_count: %d\n", 592 pkt_dev->src_mac_count, pkt_dev->dst_mac_count); 593 594 if (pkt_dev->nr_labels) { 595 unsigned i; 596 seq_printf(seq, " mpls: "); 597 for (i = 0; i < pkt_dev->nr_labels; i++) 598 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), 599 i == pkt_dev->nr_labels-1 ? "\n" : ", "); 600 } 601 602 if (pkt_dev->vlan_id != 0xffff) 603 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", 604 pkt_dev->vlan_id, pkt_dev->vlan_p, 605 pkt_dev->vlan_cfi); 606 607 if (pkt_dev->svlan_id != 0xffff) 608 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", 609 pkt_dev->svlan_id, pkt_dev->svlan_p, 610 pkt_dev->svlan_cfi); 611 612 if (pkt_dev->tos) 613 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); 614 615 if (pkt_dev->traffic_class) 616 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); 617 618 if (pkt_dev->node >= 0) 619 seq_printf(seq, " node: %d\n", pkt_dev->node); 620 621 seq_printf(seq, " Flags: "); 622 623 if (pkt_dev->flags & F_IPV6) 624 seq_printf(seq, "IPV6 "); 625 626 if (pkt_dev->flags & F_IPSRC_RND) 627 seq_printf(seq, "IPSRC_RND "); 628 629 if (pkt_dev->flags & F_IPDST_RND) 630 seq_printf(seq, "IPDST_RND "); 631 632 if (pkt_dev->flags & F_TXSIZE_RND) 633 seq_printf(seq, "TXSIZE_RND "); 634 635 if (pkt_dev->flags & F_UDPSRC_RND) 636 seq_printf(seq, "UDPSRC_RND "); 637 638 if (pkt_dev->flags & F_UDPDST_RND) 639 seq_printf(seq, "UDPDST_RND "); 640 641 if (pkt_dev->flags & F_MPLS_RND) 642 seq_printf(seq, "MPLS_RND "); 643 644 if (pkt_dev->flags & F_QUEUE_MAP_RND) 645 seq_printf(seq, "QUEUE_MAP_RND "); 646 647 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 648 seq_printf(seq, "QUEUE_MAP_CPU "); 649 650 if (pkt_dev->cflows) { 651 if (pkt_dev->flags & F_FLOW_SEQ) 652 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/ 653 else 654 seq_printf(seq, "FLOW_RND "); 655 } 656 657 #ifdef CONFIG_XFRM 658 if (pkt_dev->flags & F_IPSEC_ON) 659 seq_printf(seq, "IPSEC "); 660 #endif 661 662 if (pkt_dev->flags & F_MACSRC_RND) 663 seq_printf(seq, "MACSRC_RND "); 664 665 if (pkt_dev->flags & F_MACDST_RND) 666 seq_printf(seq, "MACDST_RND "); 667 668 if (pkt_dev->flags & F_VID_RND) 669 seq_printf(seq, "VID_RND "); 670 671 if (pkt_dev->flags & F_SVID_RND) 672 seq_printf(seq, "SVID_RND "); 673 674 if (pkt_dev->flags & F_NODE) 675 seq_printf(seq, "NODE_ALLOC "); 676 677 seq_puts(seq, "\n"); 678 679 /* not really stopped, more like last-running-at */ 680 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at; 681 idle = pkt_dev->idle_acc; 682 do_div(idle, NSEC_PER_USEC); 683 684 seq_printf(seq, 685 "Current:\n pkts-sofar: %llu errors: %llu\n", 686 (unsigned long long)pkt_dev->sofar, 687 (unsigned long long)pkt_dev->errors); 688 689 seq_printf(seq, 690 " started: %lluus stopped: %lluus idle: %lluus\n", 691 (unsigned long long) ktime_to_us(pkt_dev->started_at), 692 (unsigned long long) ktime_to_us(stopped), 693 (unsigned long long) idle); 694 695 seq_printf(seq, 696 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 697 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, 698 pkt_dev->cur_src_mac_offset); 699 700 if (pkt_dev->flags & F_IPV6) { 701 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n", 702 &pkt_dev->cur_in6_saddr, 703 &pkt_dev->cur_in6_daddr); 704 } else 705 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n", 706 pkt_dev->cur_saddr, pkt_dev->cur_daddr); 707 708 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", 709 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 710 711 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); 712 713 seq_printf(seq, " flows: %u\n", pkt_dev->nflows); 714 715 if (pkt_dev->result[0]) 716 seq_printf(seq, "Result: %s\n", pkt_dev->result); 717 else 718 seq_printf(seq, "Result: Idle\n"); 719 720 return 0; 721 } 722 723 724 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, 725 __u32 *num) 726 { 727 int i = 0; 728 *num = 0; 729 730 for (; i < maxlen; i++) { 731 int value; 732 char c; 733 *num <<= 4; 734 if (get_user(c, &user_buffer[i])) 735 return -EFAULT; 736 value = hex_to_bin(c); 737 if (value >= 0) 738 *num |= value; 739 else 740 break; 741 } 742 return i; 743 } 744 745 static int count_trail_chars(const char __user * user_buffer, 746 unsigned int maxlen) 747 { 748 int i; 749 750 for (i = 0; i < maxlen; i++) { 751 char c; 752 if (get_user(c, &user_buffer[i])) 753 return -EFAULT; 754 switch (c) { 755 case '\"': 756 case '\n': 757 case '\r': 758 case '\t': 759 case ' ': 760 case '=': 761 break; 762 default: 763 goto done; 764 } 765 } 766 done: 767 return i; 768 } 769 770 static unsigned long num_arg(const char __user * user_buffer, 771 unsigned long maxlen, unsigned long *num) 772 { 773 int i; 774 *num = 0; 775 776 for (i = 0; i < maxlen; i++) { 777 char c; 778 if (get_user(c, &user_buffer[i])) 779 return -EFAULT; 780 if ((c >= '0') && (c <= '9')) { 781 *num *= 10; 782 *num += c - '0'; 783 } else 784 break; 785 } 786 return i; 787 } 788 789 static int strn_len(const char __user * user_buffer, unsigned int maxlen) 790 { 791 int i; 792 793 for (i = 0; i < maxlen; i++) { 794 char c; 795 if (get_user(c, &user_buffer[i])) 796 return -EFAULT; 797 switch (c) { 798 case '\"': 799 case '\n': 800 case '\r': 801 case '\t': 802 case ' ': 803 goto done_str; 804 break; 805 default: 806 break; 807 } 808 } 809 done_str: 810 return i; 811 } 812 813 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) 814 { 815 unsigned n = 0; 816 char c; 817 ssize_t i = 0; 818 int len; 819 820 pkt_dev->nr_labels = 0; 821 do { 822 __u32 tmp; 823 len = hex32_arg(&buffer[i], 8, &tmp); 824 if (len <= 0) 825 return len; 826 pkt_dev->labels[n] = htonl(tmp); 827 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 828 pkt_dev->flags |= F_MPLS_RND; 829 i += len; 830 if (get_user(c, &buffer[i])) 831 return -EFAULT; 832 i++; 833 n++; 834 if (n >= MAX_MPLS_LABELS) 835 return -E2BIG; 836 } while (c == ','); 837 838 pkt_dev->nr_labels = n; 839 return i; 840 } 841 842 static ssize_t pktgen_if_write(struct file *file, 843 const char __user * user_buffer, size_t count, 844 loff_t * offset) 845 { 846 struct seq_file *seq = file->private_data; 847 struct pktgen_dev *pkt_dev = seq->private; 848 int i, max, len; 849 char name[16], valstr[32]; 850 unsigned long value = 0; 851 char *pg_result = NULL; 852 int tmp = 0; 853 char buf[128]; 854 855 pg_result = &(pkt_dev->result[0]); 856 857 if (count < 1) { 858 pr_warning("wrong command format\n"); 859 return -EINVAL; 860 } 861 862 max = count; 863 tmp = count_trail_chars(user_buffer, max); 864 if (tmp < 0) { 865 pr_warning("illegal format\n"); 866 return tmp; 867 } 868 i = tmp; 869 870 /* Read variable name */ 871 872 len = strn_len(&user_buffer[i], sizeof(name) - 1); 873 if (len < 0) 874 return len; 875 876 memset(name, 0, sizeof(name)); 877 if (copy_from_user(name, &user_buffer[i], len)) 878 return -EFAULT; 879 i += len; 880 881 max = count - i; 882 len = count_trail_chars(&user_buffer[i], max); 883 if (len < 0) 884 return len; 885 886 i += len; 887 888 if (debug) { 889 size_t copy = min_t(size_t, count, 1023); 890 char tb[copy + 1]; 891 if (copy_from_user(tb, user_buffer, copy)) 892 return -EFAULT; 893 tb[copy] = 0; 894 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name, 895 (unsigned long)count, tb); 896 } 897 898 if (!strcmp(name, "min_pkt_size")) { 899 len = num_arg(&user_buffer[i], 10, &value); 900 if (len < 0) 901 return len; 902 903 i += len; 904 if (value < 14 + 20 + 8) 905 value = 14 + 20 + 8; 906 if (value != pkt_dev->min_pkt_size) { 907 pkt_dev->min_pkt_size = value; 908 pkt_dev->cur_pkt_size = value; 909 } 910 sprintf(pg_result, "OK: min_pkt_size=%u", 911 pkt_dev->min_pkt_size); 912 return count; 913 } 914 915 if (!strcmp(name, "max_pkt_size")) { 916 len = num_arg(&user_buffer[i], 10, &value); 917 if (len < 0) 918 return len; 919 920 i += len; 921 if (value < 14 + 20 + 8) 922 value = 14 + 20 + 8; 923 if (value != pkt_dev->max_pkt_size) { 924 pkt_dev->max_pkt_size = value; 925 pkt_dev->cur_pkt_size = value; 926 } 927 sprintf(pg_result, "OK: max_pkt_size=%u", 928 pkt_dev->max_pkt_size); 929 return count; 930 } 931 932 /* Shortcut for min = max */ 933 934 if (!strcmp(name, "pkt_size")) { 935 len = num_arg(&user_buffer[i], 10, &value); 936 if (len < 0) 937 return len; 938 939 i += len; 940 if (value < 14 + 20 + 8) 941 value = 14 + 20 + 8; 942 if (value != pkt_dev->min_pkt_size) { 943 pkt_dev->min_pkt_size = value; 944 pkt_dev->max_pkt_size = value; 945 pkt_dev->cur_pkt_size = value; 946 } 947 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 948 return count; 949 } 950 951 if (!strcmp(name, "debug")) { 952 len = num_arg(&user_buffer[i], 10, &value); 953 if (len < 0) 954 return len; 955 956 i += len; 957 debug = value; 958 sprintf(pg_result, "OK: debug=%u", debug); 959 return count; 960 } 961 962 if (!strcmp(name, "frags")) { 963 len = num_arg(&user_buffer[i], 10, &value); 964 if (len < 0) 965 return len; 966 967 i += len; 968 pkt_dev->nfrags = value; 969 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 970 return count; 971 } 972 if (!strcmp(name, "delay")) { 973 len = num_arg(&user_buffer[i], 10, &value); 974 if (len < 0) 975 return len; 976 977 i += len; 978 if (value == 0x7FFFFFFF) 979 pkt_dev->delay = ULLONG_MAX; 980 else 981 pkt_dev->delay = (u64)value; 982 983 sprintf(pg_result, "OK: delay=%llu", 984 (unsigned long long) pkt_dev->delay); 985 return count; 986 } 987 if (!strcmp(name, "rate")) { 988 len = num_arg(&user_buffer[i], 10, &value); 989 if (len < 0) 990 return len; 991 992 i += len; 993 if (!value) 994 return len; 995 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value; 996 if (debug) 997 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 998 999 sprintf(pg_result, "OK: rate=%lu", value); 1000 return count; 1001 } 1002 if (!strcmp(name, "ratep")) { 1003 len = num_arg(&user_buffer[i], 10, &value); 1004 if (len < 0) 1005 return len; 1006 1007 i += len; 1008 if (!value) 1009 return len; 1010 pkt_dev->delay = NSEC_PER_SEC/value; 1011 if (debug) 1012 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 1013 1014 sprintf(pg_result, "OK: rate=%lu", value); 1015 return count; 1016 } 1017 if (!strcmp(name, "udp_src_min")) { 1018 len = num_arg(&user_buffer[i], 10, &value); 1019 if (len < 0) 1020 return len; 1021 1022 i += len; 1023 if (value != pkt_dev->udp_src_min) { 1024 pkt_dev->udp_src_min = value; 1025 pkt_dev->cur_udp_src = value; 1026 } 1027 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 1028 return count; 1029 } 1030 if (!strcmp(name, "udp_dst_min")) { 1031 len = num_arg(&user_buffer[i], 10, &value); 1032 if (len < 0) 1033 return len; 1034 1035 i += len; 1036 if (value != pkt_dev->udp_dst_min) { 1037 pkt_dev->udp_dst_min = value; 1038 pkt_dev->cur_udp_dst = value; 1039 } 1040 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 1041 return count; 1042 } 1043 if (!strcmp(name, "udp_src_max")) { 1044 len = num_arg(&user_buffer[i], 10, &value); 1045 if (len < 0) 1046 return len; 1047 1048 i += len; 1049 if (value != pkt_dev->udp_src_max) { 1050 pkt_dev->udp_src_max = value; 1051 pkt_dev->cur_udp_src = value; 1052 } 1053 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 1054 return count; 1055 } 1056 if (!strcmp(name, "udp_dst_max")) { 1057 len = num_arg(&user_buffer[i], 10, &value); 1058 if (len < 0) 1059 return len; 1060 1061 i += len; 1062 if (value != pkt_dev->udp_dst_max) { 1063 pkt_dev->udp_dst_max = value; 1064 pkt_dev->cur_udp_dst = value; 1065 } 1066 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1067 return count; 1068 } 1069 if (!strcmp(name, "clone_skb")) { 1070 len = num_arg(&user_buffer[i], 10, &value); 1071 if (len < 0) 1072 return len; 1073 if ((value > 0) && 1074 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING))) 1075 return -ENOTSUPP; 1076 i += len; 1077 pkt_dev->clone_skb = value; 1078 1079 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1080 return count; 1081 } 1082 if (!strcmp(name, "count")) { 1083 len = num_arg(&user_buffer[i], 10, &value); 1084 if (len < 0) 1085 return len; 1086 1087 i += len; 1088 pkt_dev->count = value; 1089 sprintf(pg_result, "OK: count=%llu", 1090 (unsigned long long)pkt_dev->count); 1091 return count; 1092 } 1093 if (!strcmp(name, "src_mac_count")) { 1094 len = num_arg(&user_buffer[i], 10, &value); 1095 if (len < 0) 1096 return len; 1097 1098 i += len; 1099 if (pkt_dev->src_mac_count != value) { 1100 pkt_dev->src_mac_count = value; 1101 pkt_dev->cur_src_mac_offset = 0; 1102 } 1103 sprintf(pg_result, "OK: src_mac_count=%d", 1104 pkt_dev->src_mac_count); 1105 return count; 1106 } 1107 if (!strcmp(name, "dst_mac_count")) { 1108 len = num_arg(&user_buffer[i], 10, &value); 1109 if (len < 0) 1110 return len; 1111 1112 i += len; 1113 if (pkt_dev->dst_mac_count != value) { 1114 pkt_dev->dst_mac_count = value; 1115 pkt_dev->cur_dst_mac_offset = 0; 1116 } 1117 sprintf(pg_result, "OK: dst_mac_count=%d", 1118 pkt_dev->dst_mac_count); 1119 return count; 1120 } 1121 if (!strcmp(name, "node")) { 1122 len = num_arg(&user_buffer[i], 10, &value); 1123 if (len < 0) 1124 return len; 1125 1126 i += len; 1127 1128 if (node_possible(value)) { 1129 pkt_dev->node = value; 1130 sprintf(pg_result, "OK: node=%d", pkt_dev->node); 1131 if (pkt_dev->page) { 1132 put_page(pkt_dev->page); 1133 pkt_dev->page = NULL; 1134 } 1135 } 1136 else 1137 sprintf(pg_result, "ERROR: node not possible"); 1138 return count; 1139 } 1140 if (!strcmp(name, "flag")) { 1141 char f[32]; 1142 memset(f, 0, 32); 1143 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1144 if (len < 0) 1145 return len; 1146 1147 if (copy_from_user(f, &user_buffer[i], len)) 1148 return -EFAULT; 1149 i += len; 1150 if (strcmp(f, "IPSRC_RND") == 0) 1151 pkt_dev->flags |= F_IPSRC_RND; 1152 1153 else if (strcmp(f, "!IPSRC_RND") == 0) 1154 pkt_dev->flags &= ~F_IPSRC_RND; 1155 1156 else if (strcmp(f, "TXSIZE_RND") == 0) 1157 pkt_dev->flags |= F_TXSIZE_RND; 1158 1159 else if (strcmp(f, "!TXSIZE_RND") == 0) 1160 pkt_dev->flags &= ~F_TXSIZE_RND; 1161 1162 else if (strcmp(f, "IPDST_RND") == 0) 1163 pkt_dev->flags |= F_IPDST_RND; 1164 1165 else if (strcmp(f, "!IPDST_RND") == 0) 1166 pkt_dev->flags &= ~F_IPDST_RND; 1167 1168 else if (strcmp(f, "UDPSRC_RND") == 0) 1169 pkt_dev->flags |= F_UDPSRC_RND; 1170 1171 else if (strcmp(f, "!UDPSRC_RND") == 0) 1172 pkt_dev->flags &= ~F_UDPSRC_RND; 1173 1174 else if (strcmp(f, "UDPDST_RND") == 0) 1175 pkt_dev->flags |= F_UDPDST_RND; 1176 1177 else if (strcmp(f, "!UDPDST_RND") == 0) 1178 pkt_dev->flags &= ~F_UDPDST_RND; 1179 1180 else if (strcmp(f, "MACSRC_RND") == 0) 1181 pkt_dev->flags |= F_MACSRC_RND; 1182 1183 else if (strcmp(f, "!MACSRC_RND") == 0) 1184 pkt_dev->flags &= ~F_MACSRC_RND; 1185 1186 else if (strcmp(f, "MACDST_RND") == 0) 1187 pkt_dev->flags |= F_MACDST_RND; 1188 1189 else if (strcmp(f, "!MACDST_RND") == 0) 1190 pkt_dev->flags &= ~F_MACDST_RND; 1191 1192 else if (strcmp(f, "MPLS_RND") == 0) 1193 pkt_dev->flags |= F_MPLS_RND; 1194 1195 else if (strcmp(f, "!MPLS_RND") == 0) 1196 pkt_dev->flags &= ~F_MPLS_RND; 1197 1198 else if (strcmp(f, "VID_RND") == 0) 1199 pkt_dev->flags |= F_VID_RND; 1200 1201 else if (strcmp(f, "!VID_RND") == 0) 1202 pkt_dev->flags &= ~F_VID_RND; 1203 1204 else if (strcmp(f, "SVID_RND") == 0) 1205 pkt_dev->flags |= F_SVID_RND; 1206 1207 else if (strcmp(f, "!SVID_RND") == 0) 1208 pkt_dev->flags &= ~F_SVID_RND; 1209 1210 else if (strcmp(f, "FLOW_SEQ") == 0) 1211 pkt_dev->flags |= F_FLOW_SEQ; 1212 1213 else if (strcmp(f, "QUEUE_MAP_RND") == 0) 1214 pkt_dev->flags |= F_QUEUE_MAP_RND; 1215 1216 else if (strcmp(f, "!QUEUE_MAP_RND") == 0) 1217 pkt_dev->flags &= ~F_QUEUE_MAP_RND; 1218 1219 else if (strcmp(f, "QUEUE_MAP_CPU") == 0) 1220 pkt_dev->flags |= F_QUEUE_MAP_CPU; 1221 1222 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0) 1223 pkt_dev->flags &= ~F_QUEUE_MAP_CPU; 1224 #ifdef CONFIG_XFRM 1225 else if (strcmp(f, "IPSEC") == 0) 1226 pkt_dev->flags |= F_IPSEC_ON; 1227 #endif 1228 1229 else if (strcmp(f, "!IPV6") == 0) 1230 pkt_dev->flags &= ~F_IPV6; 1231 1232 else if (strcmp(f, "NODE_ALLOC") == 0) 1233 pkt_dev->flags |= F_NODE; 1234 1235 else if (strcmp(f, "!NODE_ALLOC") == 0) 1236 pkt_dev->flags &= ~F_NODE; 1237 1238 else { 1239 sprintf(pg_result, 1240 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1241 f, 1242 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1243 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n"); 1244 return count; 1245 } 1246 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1247 return count; 1248 } 1249 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1250 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1251 if (len < 0) 1252 return len; 1253 1254 if (copy_from_user(buf, &user_buffer[i], len)) 1255 return -EFAULT; 1256 buf[len] = 0; 1257 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1258 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1259 strncpy(pkt_dev->dst_min, buf, len); 1260 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1261 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1262 } 1263 if (debug) 1264 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n", 1265 pkt_dev->dst_min); 1266 i += len; 1267 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1268 return count; 1269 } 1270 if (!strcmp(name, "dst_max")) { 1271 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1272 if (len < 0) 1273 return len; 1274 1275 1276 if (copy_from_user(buf, &user_buffer[i], len)) 1277 return -EFAULT; 1278 1279 buf[len] = 0; 1280 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1281 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1282 strncpy(pkt_dev->dst_max, buf, len); 1283 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1284 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1285 } 1286 if (debug) 1287 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n", 1288 pkt_dev->dst_max); 1289 i += len; 1290 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1291 return count; 1292 } 1293 if (!strcmp(name, "dst6")) { 1294 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1295 if (len < 0) 1296 return len; 1297 1298 pkt_dev->flags |= F_IPV6; 1299 1300 if (copy_from_user(buf, &user_buffer[i], len)) 1301 return -EFAULT; 1302 buf[len] = 0; 1303 1304 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1305 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr); 1306 1307 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr); 1308 1309 if (debug) 1310 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf); 1311 1312 i += len; 1313 sprintf(pg_result, "OK: dst6=%s", buf); 1314 return count; 1315 } 1316 if (!strcmp(name, "dst6_min")) { 1317 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1318 if (len < 0) 1319 return len; 1320 1321 pkt_dev->flags |= F_IPV6; 1322 1323 if (copy_from_user(buf, &user_buffer[i], len)) 1324 return -EFAULT; 1325 buf[len] = 0; 1326 1327 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1328 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr); 1329 1330 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, 1331 &pkt_dev->min_in6_daddr); 1332 if (debug) 1333 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf); 1334 1335 i += len; 1336 sprintf(pg_result, "OK: dst6_min=%s", buf); 1337 return count; 1338 } 1339 if (!strcmp(name, "dst6_max")) { 1340 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1341 if (len < 0) 1342 return len; 1343 1344 pkt_dev->flags |= F_IPV6; 1345 1346 if (copy_from_user(buf, &user_buffer[i], len)) 1347 return -EFAULT; 1348 buf[len] = 0; 1349 1350 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1351 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr); 1352 1353 if (debug) 1354 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf); 1355 1356 i += len; 1357 sprintf(pg_result, "OK: dst6_max=%s", buf); 1358 return count; 1359 } 1360 if (!strcmp(name, "src6")) { 1361 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1362 if (len < 0) 1363 return len; 1364 1365 pkt_dev->flags |= F_IPV6; 1366 1367 if (copy_from_user(buf, &user_buffer[i], len)) 1368 return -EFAULT; 1369 buf[len] = 0; 1370 1371 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1372 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr); 1373 1374 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr); 1375 1376 if (debug) 1377 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf); 1378 1379 i += len; 1380 sprintf(pg_result, "OK: src6=%s", buf); 1381 return count; 1382 } 1383 if (!strcmp(name, "src_min")) { 1384 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1385 if (len < 0) 1386 return len; 1387 1388 if (copy_from_user(buf, &user_buffer[i], len)) 1389 return -EFAULT; 1390 buf[len] = 0; 1391 if (strcmp(buf, pkt_dev->src_min) != 0) { 1392 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1393 strncpy(pkt_dev->src_min, buf, len); 1394 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1395 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1396 } 1397 if (debug) 1398 printk(KERN_DEBUG "pktgen: src_min set to: %s\n", 1399 pkt_dev->src_min); 1400 i += len; 1401 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1402 return count; 1403 } 1404 if (!strcmp(name, "src_max")) { 1405 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1406 if (len < 0) 1407 return len; 1408 1409 if (copy_from_user(buf, &user_buffer[i], len)) 1410 return -EFAULT; 1411 buf[len] = 0; 1412 if (strcmp(buf, pkt_dev->src_max) != 0) { 1413 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1414 strncpy(pkt_dev->src_max, buf, len); 1415 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1416 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1417 } 1418 if (debug) 1419 printk(KERN_DEBUG "pktgen: src_max set to: %s\n", 1420 pkt_dev->src_max); 1421 i += len; 1422 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1423 return count; 1424 } 1425 if (!strcmp(name, "dst_mac")) { 1426 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1427 if (len < 0) 1428 return len; 1429 1430 memset(valstr, 0, sizeof(valstr)); 1431 if (copy_from_user(valstr, &user_buffer[i], len)) 1432 return -EFAULT; 1433 1434 if (!mac_pton(valstr, pkt_dev->dst_mac)) 1435 return -EINVAL; 1436 /* Set up Dest MAC */ 1437 memcpy(&pkt_dev->hh[0], pkt_dev->dst_mac, ETH_ALEN); 1438 1439 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac); 1440 return count; 1441 } 1442 if (!strcmp(name, "src_mac")) { 1443 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1444 if (len < 0) 1445 return len; 1446 1447 memset(valstr, 0, sizeof(valstr)); 1448 if (copy_from_user(valstr, &user_buffer[i], len)) 1449 return -EFAULT; 1450 1451 if (!mac_pton(valstr, pkt_dev->src_mac)) 1452 return -EINVAL; 1453 /* Set up Src MAC */ 1454 memcpy(&pkt_dev->hh[6], pkt_dev->src_mac, ETH_ALEN); 1455 1456 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac); 1457 return count; 1458 } 1459 1460 if (!strcmp(name, "clear_counters")) { 1461 pktgen_clear_counters(pkt_dev); 1462 sprintf(pg_result, "OK: Clearing counters.\n"); 1463 return count; 1464 } 1465 1466 if (!strcmp(name, "flows")) { 1467 len = num_arg(&user_buffer[i], 10, &value); 1468 if (len < 0) 1469 return len; 1470 1471 i += len; 1472 if (value > MAX_CFLOWS) 1473 value = MAX_CFLOWS; 1474 1475 pkt_dev->cflows = value; 1476 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1477 return count; 1478 } 1479 1480 if (!strcmp(name, "flowlen")) { 1481 len = num_arg(&user_buffer[i], 10, &value); 1482 if (len < 0) 1483 return len; 1484 1485 i += len; 1486 pkt_dev->lflow = value; 1487 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1488 return count; 1489 } 1490 1491 if (!strcmp(name, "queue_map_min")) { 1492 len = num_arg(&user_buffer[i], 5, &value); 1493 if (len < 0) 1494 return len; 1495 1496 i += len; 1497 pkt_dev->queue_map_min = value; 1498 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1499 return count; 1500 } 1501 1502 if (!strcmp(name, "queue_map_max")) { 1503 len = num_arg(&user_buffer[i], 5, &value); 1504 if (len < 0) 1505 return len; 1506 1507 i += len; 1508 pkt_dev->queue_map_max = value; 1509 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1510 return count; 1511 } 1512 1513 if (!strcmp(name, "mpls")) { 1514 unsigned n, cnt; 1515 1516 len = get_labels(&user_buffer[i], pkt_dev); 1517 if (len < 0) 1518 return len; 1519 i += len; 1520 cnt = sprintf(pg_result, "OK: mpls="); 1521 for (n = 0; n < pkt_dev->nr_labels; n++) 1522 cnt += sprintf(pg_result + cnt, 1523 "%08x%s", ntohl(pkt_dev->labels[n]), 1524 n == pkt_dev->nr_labels-1 ? "" : ","); 1525 1526 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1527 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1528 pkt_dev->svlan_id = 0xffff; 1529 1530 if (debug) 1531 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n"); 1532 } 1533 return count; 1534 } 1535 1536 if (!strcmp(name, "vlan_id")) { 1537 len = num_arg(&user_buffer[i], 4, &value); 1538 if (len < 0) 1539 return len; 1540 1541 i += len; 1542 if (value <= 4095) { 1543 pkt_dev->vlan_id = value; /* turn on VLAN */ 1544 1545 if (debug) 1546 printk(KERN_DEBUG "pktgen: VLAN turned on\n"); 1547 1548 if (debug && pkt_dev->nr_labels) 1549 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1550 1551 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1552 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1553 } else { 1554 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1555 pkt_dev->svlan_id = 0xffff; 1556 1557 if (debug) 1558 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1559 } 1560 return count; 1561 } 1562 1563 if (!strcmp(name, "vlan_p")) { 1564 len = num_arg(&user_buffer[i], 1, &value); 1565 if (len < 0) 1566 return len; 1567 1568 i += len; 1569 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1570 pkt_dev->vlan_p = value; 1571 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1572 } else { 1573 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1574 } 1575 return count; 1576 } 1577 1578 if (!strcmp(name, "vlan_cfi")) { 1579 len = num_arg(&user_buffer[i], 1, &value); 1580 if (len < 0) 1581 return len; 1582 1583 i += len; 1584 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1585 pkt_dev->vlan_cfi = value; 1586 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1587 } else { 1588 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1589 } 1590 return count; 1591 } 1592 1593 if (!strcmp(name, "svlan_id")) { 1594 len = num_arg(&user_buffer[i], 4, &value); 1595 if (len < 0) 1596 return len; 1597 1598 i += len; 1599 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1600 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1601 1602 if (debug) 1603 printk(KERN_DEBUG "pktgen: SVLAN turned on\n"); 1604 1605 if (debug && pkt_dev->nr_labels) 1606 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1607 1608 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1609 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1610 } else { 1611 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1612 pkt_dev->svlan_id = 0xffff; 1613 1614 if (debug) 1615 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1616 } 1617 return count; 1618 } 1619 1620 if (!strcmp(name, "svlan_p")) { 1621 len = num_arg(&user_buffer[i], 1, &value); 1622 if (len < 0) 1623 return len; 1624 1625 i += len; 1626 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1627 pkt_dev->svlan_p = value; 1628 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1629 } else { 1630 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1631 } 1632 return count; 1633 } 1634 1635 if (!strcmp(name, "svlan_cfi")) { 1636 len = num_arg(&user_buffer[i], 1, &value); 1637 if (len < 0) 1638 return len; 1639 1640 i += len; 1641 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1642 pkt_dev->svlan_cfi = value; 1643 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1644 } else { 1645 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1646 } 1647 return count; 1648 } 1649 1650 if (!strcmp(name, "tos")) { 1651 __u32 tmp_value = 0; 1652 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1653 if (len < 0) 1654 return len; 1655 1656 i += len; 1657 if (len == 2) { 1658 pkt_dev->tos = tmp_value; 1659 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1660 } else { 1661 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1662 } 1663 return count; 1664 } 1665 1666 if (!strcmp(name, "traffic_class")) { 1667 __u32 tmp_value = 0; 1668 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1669 if (len < 0) 1670 return len; 1671 1672 i += len; 1673 if (len == 2) { 1674 pkt_dev->traffic_class = tmp_value; 1675 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1676 } else { 1677 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1678 } 1679 return count; 1680 } 1681 1682 if (!strcmp(name, "skb_priority")) { 1683 len = num_arg(&user_buffer[i], 9, &value); 1684 if (len < 0) 1685 return len; 1686 1687 i += len; 1688 pkt_dev->skb_priority = value; 1689 sprintf(pg_result, "OK: skb_priority=%i", 1690 pkt_dev->skb_priority); 1691 return count; 1692 } 1693 1694 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1695 return -EINVAL; 1696 } 1697 1698 static int pktgen_if_open(struct inode *inode, struct file *file) 1699 { 1700 return single_open(file, pktgen_if_show, PDE(inode)->data); 1701 } 1702 1703 static const struct file_operations pktgen_if_fops = { 1704 .owner = THIS_MODULE, 1705 .open = pktgen_if_open, 1706 .read = seq_read, 1707 .llseek = seq_lseek, 1708 .write = pktgen_if_write, 1709 .release = single_release, 1710 }; 1711 1712 static int pktgen_thread_show(struct seq_file *seq, void *v) 1713 { 1714 struct pktgen_thread *t = seq->private; 1715 const struct pktgen_dev *pkt_dev; 1716 1717 BUG_ON(!t); 1718 1719 seq_printf(seq, "Running: "); 1720 1721 if_lock(t); 1722 list_for_each_entry(pkt_dev, &t->if_list, list) 1723 if (pkt_dev->running) 1724 seq_printf(seq, "%s ", pkt_dev->odevname); 1725 1726 seq_printf(seq, "\nStopped: "); 1727 1728 list_for_each_entry(pkt_dev, &t->if_list, list) 1729 if (!pkt_dev->running) 1730 seq_printf(seq, "%s ", pkt_dev->odevname); 1731 1732 if (t->result[0]) 1733 seq_printf(seq, "\nResult: %s\n", t->result); 1734 else 1735 seq_printf(seq, "\nResult: NA\n"); 1736 1737 if_unlock(t); 1738 1739 return 0; 1740 } 1741 1742 static ssize_t pktgen_thread_write(struct file *file, 1743 const char __user * user_buffer, 1744 size_t count, loff_t * offset) 1745 { 1746 struct seq_file *seq = file->private_data; 1747 struct pktgen_thread *t = seq->private; 1748 int i, max, len, ret; 1749 char name[40]; 1750 char *pg_result; 1751 1752 if (count < 1) { 1753 // sprintf(pg_result, "Wrong command format"); 1754 return -EINVAL; 1755 } 1756 1757 max = count; 1758 len = count_trail_chars(user_buffer, max); 1759 if (len < 0) 1760 return len; 1761 1762 i = len; 1763 1764 /* Read variable name */ 1765 1766 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1767 if (len < 0) 1768 return len; 1769 1770 memset(name, 0, sizeof(name)); 1771 if (copy_from_user(name, &user_buffer[i], len)) 1772 return -EFAULT; 1773 i += len; 1774 1775 max = count - i; 1776 len = count_trail_chars(&user_buffer[i], max); 1777 if (len < 0) 1778 return len; 1779 1780 i += len; 1781 1782 if (debug) 1783 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n", 1784 name, (unsigned long)count); 1785 1786 if (!t) { 1787 pr_err("ERROR: No thread\n"); 1788 ret = -EINVAL; 1789 goto out; 1790 } 1791 1792 pg_result = &(t->result[0]); 1793 1794 if (!strcmp(name, "add_device")) { 1795 char f[32]; 1796 memset(f, 0, 32); 1797 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1798 if (len < 0) { 1799 ret = len; 1800 goto out; 1801 } 1802 if (copy_from_user(f, &user_buffer[i], len)) 1803 return -EFAULT; 1804 i += len; 1805 mutex_lock(&pktgen_thread_lock); 1806 pktgen_add_device(t, f); 1807 mutex_unlock(&pktgen_thread_lock); 1808 ret = count; 1809 sprintf(pg_result, "OK: add_device=%s", f); 1810 goto out; 1811 } 1812 1813 if (!strcmp(name, "rem_device_all")) { 1814 mutex_lock(&pktgen_thread_lock); 1815 t->control |= T_REMDEVALL; 1816 mutex_unlock(&pktgen_thread_lock); 1817 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1818 ret = count; 1819 sprintf(pg_result, "OK: rem_device_all"); 1820 goto out; 1821 } 1822 1823 if (!strcmp(name, "max_before_softirq")) { 1824 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1825 ret = count; 1826 goto out; 1827 } 1828 1829 ret = -EINVAL; 1830 out: 1831 return ret; 1832 } 1833 1834 static int pktgen_thread_open(struct inode *inode, struct file *file) 1835 { 1836 return single_open(file, pktgen_thread_show, PDE(inode)->data); 1837 } 1838 1839 static const struct file_operations pktgen_thread_fops = { 1840 .owner = THIS_MODULE, 1841 .open = pktgen_thread_open, 1842 .read = seq_read, 1843 .llseek = seq_lseek, 1844 .write = pktgen_thread_write, 1845 .release = single_release, 1846 }; 1847 1848 /* Think find or remove for NN */ 1849 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove) 1850 { 1851 struct pktgen_thread *t; 1852 struct pktgen_dev *pkt_dev = NULL; 1853 bool exact = (remove == FIND); 1854 1855 list_for_each_entry(t, &pktgen_threads, th_list) { 1856 pkt_dev = pktgen_find_dev(t, ifname, exact); 1857 if (pkt_dev) { 1858 if (remove) { 1859 if_lock(t); 1860 pkt_dev->removal_mark = 1; 1861 t->control |= T_REMDEV; 1862 if_unlock(t); 1863 } 1864 break; 1865 } 1866 } 1867 return pkt_dev; 1868 } 1869 1870 /* 1871 * mark a device for removal 1872 */ 1873 static void pktgen_mark_device(const char *ifname) 1874 { 1875 struct pktgen_dev *pkt_dev = NULL; 1876 const int max_tries = 10, msec_per_try = 125; 1877 int i = 0; 1878 1879 mutex_lock(&pktgen_thread_lock); 1880 pr_debug("%s: marking %s for removal\n", __func__, ifname); 1881 1882 while (1) { 1883 1884 pkt_dev = __pktgen_NN_threads(ifname, REMOVE); 1885 if (pkt_dev == NULL) 1886 break; /* success */ 1887 1888 mutex_unlock(&pktgen_thread_lock); 1889 pr_debug("%s: waiting for %s to disappear....\n", 1890 __func__, ifname); 1891 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1892 mutex_lock(&pktgen_thread_lock); 1893 1894 if (++i >= max_tries) { 1895 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n", 1896 __func__, msec_per_try * i, ifname); 1897 break; 1898 } 1899 1900 } 1901 1902 mutex_unlock(&pktgen_thread_lock); 1903 } 1904 1905 static void pktgen_change_name(struct net_device *dev) 1906 { 1907 struct pktgen_thread *t; 1908 1909 list_for_each_entry(t, &pktgen_threads, th_list) { 1910 struct pktgen_dev *pkt_dev; 1911 1912 list_for_each_entry(pkt_dev, &t->if_list, list) { 1913 if (pkt_dev->odev != dev) 1914 continue; 1915 1916 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 1917 1918 pkt_dev->entry = proc_create_data(dev->name, 0600, 1919 pg_proc_dir, 1920 &pktgen_if_fops, 1921 pkt_dev); 1922 if (!pkt_dev->entry) 1923 pr_err("can't move proc entry for '%s'\n", 1924 dev->name); 1925 break; 1926 } 1927 } 1928 } 1929 1930 static int pktgen_device_event(struct notifier_block *unused, 1931 unsigned long event, void *ptr) 1932 { 1933 struct net_device *dev = ptr; 1934 1935 if (!net_eq(dev_net(dev), &init_net)) 1936 return NOTIFY_DONE; 1937 1938 /* It is OK that we do not hold the group lock right now, 1939 * as we run under the RTNL lock. 1940 */ 1941 1942 switch (event) { 1943 case NETDEV_CHANGENAME: 1944 pktgen_change_name(dev); 1945 break; 1946 1947 case NETDEV_UNREGISTER: 1948 pktgen_mark_device(dev->name); 1949 break; 1950 } 1951 1952 return NOTIFY_DONE; 1953 } 1954 1955 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev, 1956 const char *ifname) 1957 { 1958 char b[IFNAMSIZ+5]; 1959 int i; 1960 1961 for (i = 0; ifname[i] != '@'; i++) { 1962 if (i == IFNAMSIZ) 1963 break; 1964 1965 b[i] = ifname[i]; 1966 } 1967 b[i] = 0; 1968 1969 return dev_get_by_name(&init_net, b); 1970 } 1971 1972 1973 /* Associate pktgen_dev with a device. */ 1974 1975 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname) 1976 { 1977 struct net_device *odev; 1978 int err; 1979 1980 /* Clean old setups */ 1981 if (pkt_dev->odev) { 1982 dev_put(pkt_dev->odev); 1983 pkt_dev->odev = NULL; 1984 } 1985 1986 odev = pktgen_dev_get_by_name(pkt_dev, ifname); 1987 if (!odev) { 1988 pr_err("no such netdevice: \"%s\"\n", ifname); 1989 return -ENODEV; 1990 } 1991 1992 if (odev->type != ARPHRD_ETHER) { 1993 pr_err("not an ethernet device: \"%s\"\n", ifname); 1994 err = -EINVAL; 1995 } else if (!netif_running(odev)) { 1996 pr_err("device is down: \"%s\"\n", ifname); 1997 err = -ENETDOWN; 1998 } else { 1999 pkt_dev->odev = odev; 2000 return 0; 2001 } 2002 2003 dev_put(odev); 2004 return err; 2005 } 2006 2007 /* Read pkt_dev from the interface and set up internal pktgen_dev 2008 * structure to have the right information to create/send packets 2009 */ 2010 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 2011 { 2012 int ntxq; 2013 2014 if (!pkt_dev->odev) { 2015 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n"); 2016 sprintf(pkt_dev->result, 2017 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 2018 return; 2019 } 2020 2021 /* make sure that we don't pick a non-existing transmit queue */ 2022 ntxq = pkt_dev->odev->real_num_tx_queues; 2023 2024 if (ntxq <= pkt_dev->queue_map_min) { 2025 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2026 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, 2027 pkt_dev->odevname); 2028 pkt_dev->queue_map_min = ntxq - 1; 2029 } 2030 if (pkt_dev->queue_map_max >= ntxq) { 2031 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2032 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, 2033 pkt_dev->odevname); 2034 pkt_dev->queue_map_max = ntxq - 1; 2035 } 2036 2037 /* Default to the interface's mac if not explicitly set. */ 2038 2039 if (is_zero_ether_addr(pkt_dev->src_mac)) 2040 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN); 2041 2042 /* Set up Dest MAC */ 2043 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 2044 2045 /* Set up pkt size */ 2046 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2047 2048 if (pkt_dev->flags & F_IPV6) { 2049 /* 2050 * Skip this automatic address setting until locks or functions 2051 * gets exported 2052 */ 2053 2054 #ifdef NOTNOW 2055 int i, set = 0, err = 1; 2056 struct inet6_dev *idev; 2057 2058 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2059 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2060 set = 1; 2061 break; 2062 } 2063 2064 if (!set) { 2065 2066 /* 2067 * Use linklevel address if unconfigured. 2068 * 2069 * use ipv6_get_lladdr if/when it's get exported 2070 */ 2071 2072 rcu_read_lock(); 2073 idev = __in6_dev_get(pkt_dev->odev); 2074 if (idev) { 2075 struct inet6_ifaddr *ifp; 2076 2077 read_lock_bh(&idev->lock); 2078 for (ifp = idev->addr_list; ifp; 2079 ifp = ifp->if_next) { 2080 if (ifp->scope == IFA_LINK && 2081 !(ifp->flags & IFA_F_TENTATIVE)) { 2082 ipv6_addr_copy(&pkt_dev-> 2083 cur_in6_saddr, 2084 &ifp->addr); 2085 err = 0; 2086 break; 2087 } 2088 } 2089 read_unlock_bh(&idev->lock); 2090 } 2091 rcu_read_unlock(); 2092 if (err) 2093 pr_err("ERROR: IPv6 link address not available\n"); 2094 } 2095 #endif 2096 } else { 2097 pkt_dev->saddr_min = 0; 2098 pkt_dev->saddr_max = 0; 2099 if (strlen(pkt_dev->src_min) == 0) { 2100 2101 struct in_device *in_dev; 2102 2103 rcu_read_lock(); 2104 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2105 if (in_dev) { 2106 if (in_dev->ifa_list) { 2107 pkt_dev->saddr_min = 2108 in_dev->ifa_list->ifa_address; 2109 pkt_dev->saddr_max = pkt_dev->saddr_min; 2110 } 2111 } 2112 rcu_read_unlock(); 2113 } else { 2114 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2115 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2116 } 2117 2118 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2119 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2120 } 2121 /* Initialize current values. */ 2122 pkt_dev->cur_dst_mac_offset = 0; 2123 pkt_dev->cur_src_mac_offset = 0; 2124 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2125 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2126 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2127 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2128 pkt_dev->nflows = 0; 2129 } 2130 2131 2132 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) 2133 { 2134 ktime_t start_time, end_time; 2135 s64 remaining; 2136 struct hrtimer_sleeper t; 2137 2138 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); 2139 hrtimer_set_expires(&t.timer, spin_until); 2140 2141 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer)); 2142 if (remaining <= 0) { 2143 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2144 return; 2145 } 2146 2147 start_time = ktime_now(); 2148 if (remaining < 100000) { 2149 /* for small delays (<100us), just loop until limit is reached */ 2150 do { 2151 end_time = ktime_now(); 2152 } while (ktime_lt(end_time, spin_until)); 2153 } else { 2154 /* see do_nanosleep */ 2155 hrtimer_init_sleeper(&t, current); 2156 do { 2157 set_current_state(TASK_INTERRUPTIBLE); 2158 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS); 2159 if (!hrtimer_active(&t.timer)) 2160 t.task = NULL; 2161 2162 if (likely(t.task)) 2163 schedule(); 2164 2165 hrtimer_cancel(&t.timer); 2166 } while (t.task && pkt_dev->running && !signal_pending(current)); 2167 __set_current_state(TASK_RUNNING); 2168 end_time = ktime_now(); 2169 } 2170 2171 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); 2172 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2173 } 2174 2175 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2176 { 2177 pkt_dev->pkt_overhead = 0; 2178 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2179 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2180 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2181 } 2182 2183 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) 2184 { 2185 return !!(pkt_dev->flows[flow].flags & F_INIT); 2186 } 2187 2188 static inline int f_pick(struct pktgen_dev *pkt_dev) 2189 { 2190 int flow = pkt_dev->curfl; 2191 2192 if (pkt_dev->flags & F_FLOW_SEQ) { 2193 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2194 /* reset time */ 2195 pkt_dev->flows[flow].count = 0; 2196 pkt_dev->flows[flow].flags = 0; 2197 pkt_dev->curfl += 1; 2198 if (pkt_dev->curfl >= pkt_dev->cflows) 2199 pkt_dev->curfl = 0; /*reset */ 2200 } 2201 } else { 2202 flow = random32() % pkt_dev->cflows; 2203 pkt_dev->curfl = flow; 2204 2205 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2206 pkt_dev->flows[flow].count = 0; 2207 pkt_dev->flows[flow].flags = 0; 2208 } 2209 } 2210 2211 return pkt_dev->curfl; 2212 } 2213 2214 2215 #ifdef CONFIG_XFRM 2216 /* If there was already an IPSEC SA, we keep it as is, else 2217 * we go look for it ... 2218 */ 2219 #define DUMMY_MARK 0 2220 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2221 { 2222 struct xfrm_state *x = pkt_dev->flows[flow].x; 2223 if (!x) { 2224 /*slow path: we dont already have xfrm_state*/ 2225 x = xfrm_stateonly_find(&init_net, DUMMY_MARK, 2226 (xfrm_address_t *)&pkt_dev->cur_daddr, 2227 (xfrm_address_t *)&pkt_dev->cur_saddr, 2228 AF_INET, 2229 pkt_dev->ipsmode, 2230 pkt_dev->ipsproto, 0); 2231 if (x) { 2232 pkt_dev->flows[flow].x = x; 2233 set_pkt_overhead(pkt_dev); 2234 pkt_dev->pkt_overhead += x->props.header_len; 2235 } 2236 2237 } 2238 } 2239 #endif 2240 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2241 { 2242 2243 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2244 pkt_dev->cur_queue_map = smp_processor_id(); 2245 2246 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { 2247 __u16 t; 2248 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2249 t = random32() % 2250 (pkt_dev->queue_map_max - 2251 pkt_dev->queue_map_min + 1) 2252 + pkt_dev->queue_map_min; 2253 } else { 2254 t = pkt_dev->cur_queue_map + 1; 2255 if (t > pkt_dev->queue_map_max) 2256 t = pkt_dev->queue_map_min; 2257 } 2258 pkt_dev->cur_queue_map = t; 2259 } 2260 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2261 } 2262 2263 /* Increment/randomize headers according to flags and current values 2264 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2265 */ 2266 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2267 { 2268 __u32 imn; 2269 __u32 imx; 2270 int flow = 0; 2271 2272 if (pkt_dev->cflows) 2273 flow = f_pick(pkt_dev); 2274 2275 /* Deal with source MAC */ 2276 if (pkt_dev->src_mac_count > 1) { 2277 __u32 mc; 2278 __u32 tmp; 2279 2280 if (pkt_dev->flags & F_MACSRC_RND) 2281 mc = random32() % pkt_dev->src_mac_count; 2282 else { 2283 mc = pkt_dev->cur_src_mac_offset++; 2284 if (pkt_dev->cur_src_mac_offset >= 2285 pkt_dev->src_mac_count) 2286 pkt_dev->cur_src_mac_offset = 0; 2287 } 2288 2289 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2290 pkt_dev->hh[11] = tmp; 2291 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2292 pkt_dev->hh[10] = tmp; 2293 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2294 pkt_dev->hh[9] = tmp; 2295 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2296 pkt_dev->hh[8] = tmp; 2297 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2298 pkt_dev->hh[7] = tmp; 2299 } 2300 2301 /* Deal with Destination MAC */ 2302 if (pkt_dev->dst_mac_count > 1) { 2303 __u32 mc; 2304 __u32 tmp; 2305 2306 if (pkt_dev->flags & F_MACDST_RND) 2307 mc = random32() % pkt_dev->dst_mac_count; 2308 2309 else { 2310 mc = pkt_dev->cur_dst_mac_offset++; 2311 if (pkt_dev->cur_dst_mac_offset >= 2312 pkt_dev->dst_mac_count) { 2313 pkt_dev->cur_dst_mac_offset = 0; 2314 } 2315 } 2316 2317 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2318 pkt_dev->hh[5] = tmp; 2319 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2320 pkt_dev->hh[4] = tmp; 2321 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2322 pkt_dev->hh[3] = tmp; 2323 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2324 pkt_dev->hh[2] = tmp; 2325 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2326 pkt_dev->hh[1] = tmp; 2327 } 2328 2329 if (pkt_dev->flags & F_MPLS_RND) { 2330 unsigned i; 2331 for (i = 0; i < pkt_dev->nr_labels; i++) 2332 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2333 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2334 ((__force __be32)random32() & 2335 htonl(0x000fffff)); 2336 } 2337 2338 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2339 pkt_dev->vlan_id = random32() & (4096-1); 2340 } 2341 2342 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2343 pkt_dev->svlan_id = random32() & (4096 - 1); 2344 } 2345 2346 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2347 if (pkt_dev->flags & F_UDPSRC_RND) 2348 pkt_dev->cur_udp_src = random32() % 2349 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2350 + pkt_dev->udp_src_min; 2351 2352 else { 2353 pkt_dev->cur_udp_src++; 2354 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2355 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2356 } 2357 } 2358 2359 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2360 if (pkt_dev->flags & F_UDPDST_RND) { 2361 pkt_dev->cur_udp_dst = random32() % 2362 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2363 + pkt_dev->udp_dst_min; 2364 } else { 2365 pkt_dev->cur_udp_dst++; 2366 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2367 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2368 } 2369 } 2370 2371 if (!(pkt_dev->flags & F_IPV6)) { 2372 2373 imn = ntohl(pkt_dev->saddr_min); 2374 imx = ntohl(pkt_dev->saddr_max); 2375 if (imn < imx) { 2376 __u32 t; 2377 if (pkt_dev->flags & F_IPSRC_RND) 2378 t = random32() % (imx - imn) + imn; 2379 else { 2380 t = ntohl(pkt_dev->cur_saddr); 2381 t++; 2382 if (t > imx) 2383 t = imn; 2384 2385 } 2386 pkt_dev->cur_saddr = htonl(t); 2387 } 2388 2389 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2390 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2391 } else { 2392 imn = ntohl(pkt_dev->daddr_min); 2393 imx = ntohl(pkt_dev->daddr_max); 2394 if (imn < imx) { 2395 __u32 t; 2396 __be32 s; 2397 if (pkt_dev->flags & F_IPDST_RND) { 2398 2399 t = random32() % (imx - imn) + imn; 2400 s = htonl(t); 2401 2402 while (ipv4_is_loopback(s) || 2403 ipv4_is_multicast(s) || 2404 ipv4_is_lbcast(s) || 2405 ipv4_is_zeronet(s) || 2406 ipv4_is_local_multicast(s)) { 2407 t = random32() % (imx - imn) + imn; 2408 s = htonl(t); 2409 } 2410 pkt_dev->cur_daddr = s; 2411 } else { 2412 t = ntohl(pkt_dev->cur_daddr); 2413 t++; 2414 if (t > imx) { 2415 t = imn; 2416 } 2417 pkt_dev->cur_daddr = htonl(t); 2418 } 2419 } 2420 if (pkt_dev->cflows) { 2421 pkt_dev->flows[flow].flags |= F_INIT; 2422 pkt_dev->flows[flow].cur_daddr = 2423 pkt_dev->cur_daddr; 2424 #ifdef CONFIG_XFRM 2425 if (pkt_dev->flags & F_IPSEC_ON) 2426 get_ipsec_sa(pkt_dev, flow); 2427 #endif 2428 pkt_dev->nflows++; 2429 } 2430 } 2431 } else { /* IPV6 * */ 2432 2433 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 && 2434 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 && 2435 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 && 2436 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ; 2437 else { 2438 int i; 2439 2440 /* Only random destinations yet */ 2441 2442 for (i = 0; i < 4; i++) { 2443 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2444 (((__force __be32)random32() | 2445 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2446 pkt_dev->max_in6_daddr.s6_addr32[i]); 2447 } 2448 } 2449 } 2450 2451 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2452 __u32 t; 2453 if (pkt_dev->flags & F_TXSIZE_RND) { 2454 t = random32() % 2455 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2456 + pkt_dev->min_pkt_size; 2457 } else { 2458 t = pkt_dev->cur_pkt_size + 1; 2459 if (t > pkt_dev->max_pkt_size) 2460 t = pkt_dev->min_pkt_size; 2461 } 2462 pkt_dev->cur_pkt_size = t; 2463 } 2464 2465 set_cur_queue_map(pkt_dev); 2466 2467 pkt_dev->flows[flow].count++; 2468 } 2469 2470 2471 #ifdef CONFIG_XFRM 2472 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2473 { 2474 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2475 int err = 0; 2476 2477 if (!x) 2478 return 0; 2479 /* XXX: we dont support tunnel mode for now until 2480 * we resolve the dst issue */ 2481 if (x->props.mode != XFRM_MODE_TRANSPORT) 2482 return 0; 2483 2484 spin_lock(&x->lock); 2485 2486 err = x->outer_mode->output(x, skb); 2487 if (err) 2488 goto error; 2489 err = x->type->output(x, skb); 2490 if (err) 2491 goto error; 2492 2493 x->curlft.bytes += skb->len; 2494 x->curlft.packets++; 2495 error: 2496 spin_unlock(&x->lock); 2497 return err; 2498 } 2499 2500 static void free_SAs(struct pktgen_dev *pkt_dev) 2501 { 2502 if (pkt_dev->cflows) { 2503 /* let go of the SAs if we have them */ 2504 int i; 2505 for (i = 0; i < pkt_dev->cflows; i++) { 2506 struct xfrm_state *x = pkt_dev->flows[i].x; 2507 if (x) { 2508 xfrm_state_put(x); 2509 pkt_dev->flows[i].x = NULL; 2510 } 2511 } 2512 } 2513 } 2514 2515 static int process_ipsec(struct pktgen_dev *pkt_dev, 2516 struct sk_buff *skb, __be16 protocol) 2517 { 2518 if (pkt_dev->flags & F_IPSEC_ON) { 2519 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2520 int nhead = 0; 2521 if (x) { 2522 int ret; 2523 __u8 *eth; 2524 nhead = x->props.header_len - skb_headroom(skb); 2525 if (nhead > 0) { 2526 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2527 if (ret < 0) { 2528 pr_err("Error expanding ipsec packet %d\n", 2529 ret); 2530 goto err; 2531 } 2532 } 2533 2534 /* ipsec is not expecting ll header */ 2535 skb_pull(skb, ETH_HLEN); 2536 ret = pktgen_output_ipsec(skb, pkt_dev); 2537 if (ret) { 2538 pr_err("Error creating ipsec packet %d\n", ret); 2539 goto err; 2540 } 2541 /* restore ll */ 2542 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2543 memcpy(eth, pkt_dev->hh, 12); 2544 *(u16 *) ð[12] = protocol; 2545 } 2546 } 2547 return 1; 2548 err: 2549 kfree_skb(skb); 2550 return 0; 2551 } 2552 #endif 2553 2554 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2555 { 2556 unsigned i; 2557 for (i = 0; i < pkt_dev->nr_labels; i++) 2558 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2559 2560 mpls--; 2561 *mpls |= MPLS_STACK_BOTTOM; 2562 } 2563 2564 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2565 unsigned int prio) 2566 { 2567 return htons(id | (cfi << 12) | (prio << 13)); 2568 } 2569 2570 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb, 2571 int datalen) 2572 { 2573 struct timeval timestamp; 2574 struct pktgen_hdr *pgh; 2575 2576 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh)); 2577 datalen -= sizeof(*pgh); 2578 2579 if (pkt_dev->nfrags <= 0) { 2580 memset(skb_put(skb, datalen), 0, datalen); 2581 } else { 2582 int frags = pkt_dev->nfrags; 2583 int i, len; 2584 int frag_len; 2585 2586 2587 if (frags > MAX_SKB_FRAGS) 2588 frags = MAX_SKB_FRAGS; 2589 len = datalen - frags * PAGE_SIZE; 2590 if (len > 0) { 2591 memset(skb_put(skb, len), 0, len); 2592 datalen = frags * PAGE_SIZE; 2593 } 2594 2595 i = 0; 2596 frag_len = (datalen/frags) < PAGE_SIZE ? 2597 (datalen/frags) : PAGE_SIZE; 2598 while (datalen > 0) { 2599 if (unlikely(!pkt_dev->page)) { 2600 int node = numa_node_id(); 2601 2602 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE)) 2603 node = pkt_dev->node; 2604 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0); 2605 if (!pkt_dev->page) 2606 break; 2607 } 2608 get_page(pkt_dev->page); 2609 skb_frag_set_page(skb, i, pkt_dev->page); 2610 skb_shinfo(skb)->frags[i].page_offset = 0; 2611 /*last fragment, fill rest of data*/ 2612 if (i == (frags - 1)) 2613 skb_frag_size_set(&skb_shinfo(skb)->frags[i], 2614 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE)); 2615 else 2616 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len); 2617 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]); 2618 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]); 2619 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]); 2620 i++; 2621 skb_shinfo(skb)->nr_frags = i; 2622 } 2623 } 2624 2625 /* Stamp the time, and sequence number, 2626 * convert them to network byte order 2627 */ 2628 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2629 pgh->seq_num = htonl(pkt_dev->seq_num); 2630 2631 do_gettimeofday(×tamp); 2632 pgh->tv_sec = htonl(timestamp.tv_sec); 2633 pgh->tv_usec = htonl(timestamp.tv_usec); 2634 } 2635 2636 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2637 struct pktgen_dev *pkt_dev) 2638 { 2639 struct sk_buff *skb = NULL; 2640 __u8 *eth; 2641 struct udphdr *udph; 2642 int datalen, iplen; 2643 struct iphdr *iph; 2644 __be16 protocol = htons(ETH_P_IP); 2645 __be32 *mpls; 2646 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2647 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2648 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2649 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2650 u16 queue_map; 2651 2652 if (pkt_dev->nr_labels) 2653 protocol = htons(ETH_P_MPLS_UC); 2654 2655 if (pkt_dev->vlan_id != 0xffff) 2656 protocol = htons(ETH_P_8021Q); 2657 2658 /* Update any of the values, used when we're incrementing various 2659 * fields. 2660 */ 2661 mod_cur_headers(pkt_dev); 2662 queue_map = pkt_dev->cur_queue_map; 2663 2664 datalen = (odev->hard_header_len + 16) & ~0xf; 2665 2666 if (pkt_dev->flags & F_NODE) { 2667 int node; 2668 2669 if (pkt_dev->node >= 0) 2670 node = pkt_dev->node; 2671 else 2672 node = numa_node_id(); 2673 2674 skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64 2675 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node); 2676 if (likely(skb)) { 2677 skb_reserve(skb, NET_SKB_PAD); 2678 skb->dev = odev; 2679 } 2680 } 2681 else 2682 skb = __netdev_alloc_skb(odev, 2683 pkt_dev->cur_pkt_size + 64 2684 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT); 2685 2686 if (!skb) { 2687 sprintf(pkt_dev->result, "No memory"); 2688 return NULL; 2689 } 2690 prefetchw(skb->data); 2691 2692 skb_reserve(skb, datalen); 2693 2694 /* Reserve for ethernet and IP header */ 2695 eth = (__u8 *) skb_push(skb, 14); 2696 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2697 if (pkt_dev->nr_labels) 2698 mpls_push(mpls, pkt_dev); 2699 2700 if (pkt_dev->vlan_id != 0xffff) { 2701 if (pkt_dev->svlan_id != 0xffff) { 2702 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2703 *svlan_tci = build_tci(pkt_dev->svlan_id, 2704 pkt_dev->svlan_cfi, 2705 pkt_dev->svlan_p); 2706 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2707 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2708 } 2709 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2710 *vlan_tci = build_tci(pkt_dev->vlan_id, 2711 pkt_dev->vlan_cfi, 2712 pkt_dev->vlan_p); 2713 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2714 *vlan_encapsulated_proto = htons(ETH_P_IP); 2715 } 2716 2717 skb->network_header = skb->tail; 2718 skb->transport_header = skb->network_header + sizeof(struct iphdr); 2719 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr)); 2720 skb_set_queue_mapping(skb, queue_map); 2721 skb->priority = pkt_dev->skb_priority; 2722 2723 iph = ip_hdr(skb); 2724 udph = udp_hdr(skb); 2725 2726 memcpy(eth, pkt_dev->hh, 12); 2727 *(__be16 *) & eth[12] = protocol; 2728 2729 /* Eth + IPh + UDPh + mpls */ 2730 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2731 pkt_dev->pkt_overhead; 2732 if (datalen < sizeof(struct pktgen_hdr)) 2733 datalen = sizeof(struct pktgen_hdr); 2734 2735 udph->source = htons(pkt_dev->cur_udp_src); 2736 udph->dest = htons(pkt_dev->cur_udp_dst); 2737 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2738 udph->check = 0; /* No checksum */ 2739 2740 iph->ihl = 5; 2741 iph->version = 4; 2742 iph->ttl = 32; 2743 iph->tos = pkt_dev->tos; 2744 iph->protocol = IPPROTO_UDP; /* UDP */ 2745 iph->saddr = pkt_dev->cur_saddr; 2746 iph->daddr = pkt_dev->cur_daddr; 2747 iph->id = htons(pkt_dev->ip_id); 2748 pkt_dev->ip_id++; 2749 iph->frag_off = 0; 2750 iplen = 20 + 8 + datalen; 2751 iph->tot_len = htons(iplen); 2752 iph->check = 0; 2753 iph->check = ip_fast_csum((void *)iph, iph->ihl); 2754 skb->protocol = protocol; 2755 skb->mac_header = (skb->network_header - ETH_HLEN - 2756 pkt_dev->pkt_overhead); 2757 skb->dev = odev; 2758 skb->pkt_type = PACKET_HOST; 2759 pktgen_finalize_skb(pkt_dev, skb, datalen); 2760 2761 #ifdef CONFIG_XFRM 2762 if (!process_ipsec(pkt_dev, skb, protocol)) 2763 return NULL; 2764 #endif 2765 2766 return skb; 2767 } 2768 2769 /* 2770 * scan_ip6, fmt_ip taken from dietlibc-0.21 2771 * Author Felix von Leitner <felix-dietlibc@fefe.de> 2772 * 2773 * Slightly modified for kernel. 2774 * Should be candidate for net/ipv4/utils.c 2775 * --ro 2776 */ 2777 2778 static unsigned int scan_ip6(const char *s, char ip[16]) 2779 { 2780 unsigned int i; 2781 unsigned int len = 0; 2782 unsigned long u; 2783 char suffix[16]; 2784 unsigned int prefixlen = 0; 2785 unsigned int suffixlen = 0; 2786 __be32 tmp; 2787 char *pos; 2788 2789 for (i = 0; i < 16; i++) 2790 ip[i] = 0; 2791 2792 for (;;) { 2793 if (*s == ':') { 2794 len++; 2795 if (s[1] == ':') { /* Found "::", skip to part 2 */ 2796 s += 2; 2797 len++; 2798 break; 2799 } 2800 s++; 2801 } 2802 2803 u = simple_strtoul(s, &pos, 16); 2804 i = pos - s; 2805 if (!i) 2806 return 0; 2807 if (prefixlen == 12 && s[i] == '.') { 2808 2809 /* the last 4 bytes may be written as IPv4 address */ 2810 2811 tmp = in_aton(s); 2812 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp)); 2813 return i + len; 2814 } 2815 ip[prefixlen++] = (u >> 8); 2816 ip[prefixlen++] = (u & 255); 2817 s += i; 2818 len += i; 2819 if (prefixlen == 16) 2820 return len; 2821 } 2822 2823 /* part 2, after "::" */ 2824 for (;;) { 2825 if (*s == ':') { 2826 if (suffixlen == 0) 2827 break; 2828 s++; 2829 len++; 2830 } else if (suffixlen != 0) 2831 break; 2832 2833 u = simple_strtol(s, &pos, 16); 2834 i = pos - s; 2835 if (!i) { 2836 if (*s) 2837 len--; 2838 break; 2839 } 2840 if (suffixlen + prefixlen <= 12 && s[i] == '.') { 2841 tmp = in_aton(s); 2842 memcpy((struct in_addr *)(suffix + suffixlen), &tmp, 2843 sizeof(tmp)); 2844 suffixlen += 4; 2845 len += strlen(s); 2846 break; 2847 } 2848 suffix[suffixlen++] = (u >> 8); 2849 suffix[suffixlen++] = (u & 255); 2850 s += i; 2851 len += i; 2852 if (prefixlen + suffixlen == 16) 2853 break; 2854 } 2855 for (i = 0; i < suffixlen; i++) 2856 ip[16 - suffixlen + i] = suffix[i]; 2857 return len; 2858 } 2859 2860 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2861 struct pktgen_dev *pkt_dev) 2862 { 2863 struct sk_buff *skb = NULL; 2864 __u8 *eth; 2865 struct udphdr *udph; 2866 int datalen; 2867 struct ipv6hdr *iph; 2868 __be16 protocol = htons(ETH_P_IPV6); 2869 __be32 *mpls; 2870 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2871 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2872 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2873 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2874 u16 queue_map; 2875 2876 if (pkt_dev->nr_labels) 2877 protocol = htons(ETH_P_MPLS_UC); 2878 2879 if (pkt_dev->vlan_id != 0xffff) 2880 protocol = htons(ETH_P_8021Q); 2881 2882 /* Update any of the values, used when we're incrementing various 2883 * fields. 2884 */ 2885 mod_cur_headers(pkt_dev); 2886 queue_map = pkt_dev->cur_queue_map; 2887 2888 skb = __netdev_alloc_skb(odev, 2889 pkt_dev->cur_pkt_size + 64 2890 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT); 2891 if (!skb) { 2892 sprintf(pkt_dev->result, "No memory"); 2893 return NULL; 2894 } 2895 prefetchw(skb->data); 2896 2897 skb_reserve(skb, 16); 2898 2899 /* Reserve for ethernet and IP header */ 2900 eth = (__u8 *) skb_push(skb, 14); 2901 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2902 if (pkt_dev->nr_labels) 2903 mpls_push(mpls, pkt_dev); 2904 2905 if (pkt_dev->vlan_id != 0xffff) { 2906 if (pkt_dev->svlan_id != 0xffff) { 2907 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2908 *svlan_tci = build_tci(pkt_dev->svlan_id, 2909 pkt_dev->svlan_cfi, 2910 pkt_dev->svlan_p); 2911 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2912 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2913 } 2914 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2915 *vlan_tci = build_tci(pkt_dev->vlan_id, 2916 pkt_dev->vlan_cfi, 2917 pkt_dev->vlan_p); 2918 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2919 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 2920 } 2921 2922 skb->network_header = skb->tail; 2923 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr); 2924 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr)); 2925 skb_set_queue_mapping(skb, queue_map); 2926 skb->priority = pkt_dev->skb_priority; 2927 iph = ipv6_hdr(skb); 2928 udph = udp_hdr(skb); 2929 2930 memcpy(eth, pkt_dev->hh, 12); 2931 *(__be16 *) ð[12] = protocol; 2932 2933 /* Eth + IPh + UDPh + mpls */ 2934 datalen = pkt_dev->cur_pkt_size - 14 - 2935 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 2936 pkt_dev->pkt_overhead; 2937 2938 if (datalen < sizeof(struct pktgen_hdr)) { 2939 datalen = sizeof(struct pktgen_hdr); 2940 if (net_ratelimit()) 2941 pr_info("increased datalen to %d\n", datalen); 2942 } 2943 2944 udph->source = htons(pkt_dev->cur_udp_src); 2945 udph->dest = htons(pkt_dev->cur_udp_dst); 2946 udph->len = htons(datalen + sizeof(struct udphdr)); 2947 udph->check = 0; /* No checksum */ 2948 2949 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 2950 2951 if (pkt_dev->traffic_class) { 2952 /* Version + traffic class + flow (0) */ 2953 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 2954 } 2955 2956 iph->hop_limit = 32; 2957 2958 iph->payload_len = htons(sizeof(struct udphdr) + datalen); 2959 iph->nexthdr = IPPROTO_UDP; 2960 2961 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr); 2962 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr); 2963 2964 skb->mac_header = (skb->network_header - ETH_HLEN - 2965 pkt_dev->pkt_overhead); 2966 skb->protocol = protocol; 2967 skb->dev = odev; 2968 skb->pkt_type = PACKET_HOST; 2969 2970 pktgen_finalize_skb(pkt_dev, skb, datalen); 2971 2972 return skb; 2973 } 2974 2975 static struct sk_buff *fill_packet(struct net_device *odev, 2976 struct pktgen_dev *pkt_dev) 2977 { 2978 if (pkt_dev->flags & F_IPV6) 2979 return fill_packet_ipv6(odev, pkt_dev); 2980 else 2981 return fill_packet_ipv4(odev, pkt_dev); 2982 } 2983 2984 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 2985 { 2986 pkt_dev->seq_num = 1; 2987 pkt_dev->idle_acc = 0; 2988 pkt_dev->sofar = 0; 2989 pkt_dev->tx_bytes = 0; 2990 pkt_dev->errors = 0; 2991 } 2992 2993 /* Set up structure for sending pkts, clear counters */ 2994 2995 static void pktgen_run(struct pktgen_thread *t) 2996 { 2997 struct pktgen_dev *pkt_dev; 2998 int started = 0; 2999 3000 func_enter(); 3001 3002 if_lock(t); 3003 list_for_each_entry(pkt_dev, &t->if_list, list) { 3004 3005 /* 3006 * setup odev and create initial packet. 3007 */ 3008 pktgen_setup_inject(pkt_dev); 3009 3010 if (pkt_dev->odev) { 3011 pktgen_clear_counters(pkt_dev); 3012 pkt_dev->running = 1; /* Cranke yeself! */ 3013 pkt_dev->skb = NULL; 3014 pkt_dev->started_at = 3015 pkt_dev->next_tx = ktime_now(); 3016 3017 set_pkt_overhead(pkt_dev); 3018 3019 strcpy(pkt_dev->result, "Starting"); 3020 started++; 3021 } else 3022 strcpy(pkt_dev->result, "Error starting"); 3023 } 3024 if_unlock(t); 3025 if (started) 3026 t->control &= ~(T_STOP); 3027 } 3028 3029 static void pktgen_stop_all_threads_ifs(void) 3030 { 3031 struct pktgen_thread *t; 3032 3033 func_enter(); 3034 3035 mutex_lock(&pktgen_thread_lock); 3036 3037 list_for_each_entry(t, &pktgen_threads, th_list) 3038 t->control |= T_STOP; 3039 3040 mutex_unlock(&pktgen_thread_lock); 3041 } 3042 3043 static int thread_is_running(const struct pktgen_thread *t) 3044 { 3045 const struct pktgen_dev *pkt_dev; 3046 3047 list_for_each_entry(pkt_dev, &t->if_list, list) 3048 if (pkt_dev->running) 3049 return 1; 3050 return 0; 3051 } 3052 3053 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3054 { 3055 if_lock(t); 3056 3057 while (thread_is_running(t)) { 3058 3059 if_unlock(t); 3060 3061 msleep_interruptible(100); 3062 3063 if (signal_pending(current)) 3064 goto signal; 3065 if_lock(t); 3066 } 3067 if_unlock(t); 3068 return 1; 3069 signal: 3070 return 0; 3071 } 3072 3073 static int pktgen_wait_all_threads_run(void) 3074 { 3075 struct pktgen_thread *t; 3076 int sig = 1; 3077 3078 mutex_lock(&pktgen_thread_lock); 3079 3080 list_for_each_entry(t, &pktgen_threads, th_list) { 3081 sig = pktgen_wait_thread_run(t); 3082 if (sig == 0) 3083 break; 3084 } 3085 3086 if (sig == 0) 3087 list_for_each_entry(t, &pktgen_threads, th_list) 3088 t->control |= (T_STOP); 3089 3090 mutex_unlock(&pktgen_thread_lock); 3091 return sig; 3092 } 3093 3094 static void pktgen_run_all_threads(void) 3095 { 3096 struct pktgen_thread *t; 3097 3098 func_enter(); 3099 3100 mutex_lock(&pktgen_thread_lock); 3101 3102 list_for_each_entry(t, &pktgen_threads, th_list) 3103 t->control |= (T_RUN); 3104 3105 mutex_unlock(&pktgen_thread_lock); 3106 3107 /* Propagate thread->control */ 3108 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3109 3110 pktgen_wait_all_threads_run(); 3111 } 3112 3113 static void pktgen_reset_all_threads(void) 3114 { 3115 struct pktgen_thread *t; 3116 3117 func_enter(); 3118 3119 mutex_lock(&pktgen_thread_lock); 3120 3121 list_for_each_entry(t, &pktgen_threads, th_list) 3122 t->control |= (T_REMDEVALL); 3123 3124 mutex_unlock(&pktgen_thread_lock); 3125 3126 /* Propagate thread->control */ 3127 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3128 3129 pktgen_wait_all_threads_run(); 3130 } 3131 3132 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3133 { 3134 __u64 bps, mbps, pps; 3135 char *p = pkt_dev->result; 3136 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3137 pkt_dev->started_at); 3138 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3139 3140 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", 3141 (unsigned long long)ktime_to_us(elapsed), 3142 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3143 (unsigned long long)ktime_to_us(idle), 3144 (unsigned long long)pkt_dev->sofar, 3145 pkt_dev->cur_pkt_size, nr_frags); 3146 3147 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3148 ktime_to_ns(elapsed)); 3149 3150 bps = pps * 8 * pkt_dev->cur_pkt_size; 3151 3152 mbps = bps; 3153 do_div(mbps, 1000000); 3154 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3155 (unsigned long long)pps, 3156 (unsigned long long)mbps, 3157 (unsigned long long)bps, 3158 (unsigned long long)pkt_dev->errors); 3159 } 3160 3161 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3162 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3163 { 3164 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3165 3166 if (!pkt_dev->running) { 3167 pr_warning("interface: %s is already stopped\n", 3168 pkt_dev->odevname); 3169 return -EINVAL; 3170 } 3171 3172 kfree_skb(pkt_dev->skb); 3173 pkt_dev->skb = NULL; 3174 pkt_dev->stopped_at = ktime_now(); 3175 pkt_dev->running = 0; 3176 3177 show_results(pkt_dev, nr_frags); 3178 3179 return 0; 3180 } 3181 3182 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3183 { 3184 struct pktgen_dev *pkt_dev, *best = NULL; 3185 3186 if_lock(t); 3187 3188 list_for_each_entry(pkt_dev, &t->if_list, list) { 3189 if (!pkt_dev->running) 3190 continue; 3191 if (best == NULL) 3192 best = pkt_dev; 3193 else if (ktime_lt(pkt_dev->next_tx, best->next_tx)) 3194 best = pkt_dev; 3195 } 3196 if_unlock(t); 3197 return best; 3198 } 3199 3200 static void pktgen_stop(struct pktgen_thread *t) 3201 { 3202 struct pktgen_dev *pkt_dev; 3203 3204 func_enter(); 3205 3206 if_lock(t); 3207 3208 list_for_each_entry(pkt_dev, &t->if_list, list) { 3209 pktgen_stop_device(pkt_dev); 3210 } 3211 3212 if_unlock(t); 3213 } 3214 3215 /* 3216 * one of our devices needs to be removed - find it 3217 * and remove it 3218 */ 3219 static void pktgen_rem_one_if(struct pktgen_thread *t) 3220 { 3221 struct list_head *q, *n; 3222 struct pktgen_dev *cur; 3223 3224 func_enter(); 3225 3226 if_lock(t); 3227 3228 list_for_each_safe(q, n, &t->if_list) { 3229 cur = list_entry(q, struct pktgen_dev, list); 3230 3231 if (!cur->removal_mark) 3232 continue; 3233 3234 kfree_skb(cur->skb); 3235 cur->skb = NULL; 3236 3237 pktgen_remove_device(t, cur); 3238 3239 break; 3240 } 3241 3242 if_unlock(t); 3243 } 3244 3245 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3246 { 3247 struct list_head *q, *n; 3248 struct pktgen_dev *cur; 3249 3250 func_enter(); 3251 3252 /* Remove all devices, free mem */ 3253 3254 if_lock(t); 3255 3256 list_for_each_safe(q, n, &t->if_list) { 3257 cur = list_entry(q, struct pktgen_dev, list); 3258 3259 kfree_skb(cur->skb); 3260 cur->skb = NULL; 3261 3262 pktgen_remove_device(t, cur); 3263 } 3264 3265 if_unlock(t); 3266 } 3267 3268 static void pktgen_rem_thread(struct pktgen_thread *t) 3269 { 3270 /* Remove from the thread list */ 3271 3272 remove_proc_entry(t->tsk->comm, pg_proc_dir); 3273 3274 } 3275 3276 static void pktgen_resched(struct pktgen_dev *pkt_dev) 3277 { 3278 ktime_t idle_start = ktime_now(); 3279 schedule(); 3280 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3281 } 3282 3283 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) 3284 { 3285 ktime_t idle_start = ktime_now(); 3286 3287 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3288 if (signal_pending(current)) 3289 break; 3290 3291 if (need_resched()) 3292 pktgen_resched(pkt_dev); 3293 else 3294 cpu_relax(); 3295 } 3296 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3297 } 3298 3299 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3300 { 3301 struct net_device *odev = pkt_dev->odev; 3302 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *) 3303 = odev->netdev_ops->ndo_start_xmit; 3304 struct netdev_queue *txq; 3305 u16 queue_map; 3306 int ret; 3307 3308 /* If device is offline, then don't send */ 3309 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { 3310 pktgen_stop_device(pkt_dev); 3311 return; 3312 } 3313 3314 /* This is max DELAY, this has special meaning of 3315 * "never transmit" 3316 */ 3317 if (unlikely(pkt_dev->delay == ULLONG_MAX)) { 3318 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX); 3319 return; 3320 } 3321 3322 /* If no skb or clone count exhausted then get new one */ 3323 if (!pkt_dev->skb || (pkt_dev->last_ok && 3324 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { 3325 /* build a new pkt */ 3326 kfree_skb(pkt_dev->skb); 3327 3328 pkt_dev->skb = fill_packet(odev, pkt_dev); 3329 if (pkt_dev->skb == NULL) { 3330 pr_err("ERROR: couldn't allocate skb in fill_packet\n"); 3331 schedule(); 3332 pkt_dev->clone_count--; /* back out increment, OOM */ 3333 return; 3334 } 3335 pkt_dev->last_pkt_size = pkt_dev->skb->len; 3336 pkt_dev->allocated_skbs++; 3337 pkt_dev->clone_count = 0; /* reset counter */ 3338 } 3339 3340 if (pkt_dev->delay && pkt_dev->last_ok) 3341 spin(pkt_dev, pkt_dev->next_tx); 3342 3343 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3344 txq = netdev_get_tx_queue(odev, queue_map); 3345 3346 __netif_tx_lock_bh(txq); 3347 3348 if (unlikely(netif_tx_queue_frozen_or_stopped(txq))) { 3349 ret = NETDEV_TX_BUSY; 3350 pkt_dev->last_ok = 0; 3351 goto unlock; 3352 } 3353 atomic_inc(&(pkt_dev->skb->users)); 3354 ret = (*xmit)(pkt_dev->skb, odev); 3355 3356 switch (ret) { 3357 case NETDEV_TX_OK: 3358 txq_trans_update(txq); 3359 pkt_dev->last_ok = 1; 3360 pkt_dev->sofar++; 3361 pkt_dev->seq_num++; 3362 pkt_dev->tx_bytes += pkt_dev->last_pkt_size; 3363 break; 3364 case NET_XMIT_DROP: 3365 case NET_XMIT_CN: 3366 case NET_XMIT_POLICED: 3367 /* skb has been consumed */ 3368 pkt_dev->errors++; 3369 break; 3370 default: /* Drivers are not supposed to return other values! */ 3371 if (net_ratelimit()) 3372 pr_info("%s xmit error: %d\n", pkt_dev->odevname, ret); 3373 pkt_dev->errors++; 3374 /* fallthru */ 3375 case NETDEV_TX_LOCKED: 3376 case NETDEV_TX_BUSY: 3377 /* Retry it next time */ 3378 atomic_dec(&(pkt_dev->skb->users)); 3379 pkt_dev->last_ok = 0; 3380 } 3381 unlock: 3382 __netif_tx_unlock_bh(txq); 3383 3384 /* If pkt_dev->count is zero, then run forever */ 3385 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3386 pktgen_wait_for_skb(pkt_dev); 3387 3388 /* Done with this */ 3389 pktgen_stop_device(pkt_dev); 3390 } 3391 } 3392 3393 /* 3394 * Main loop of the thread goes here 3395 */ 3396 3397 static int pktgen_thread_worker(void *arg) 3398 { 3399 DEFINE_WAIT(wait); 3400 struct pktgen_thread *t = arg; 3401 struct pktgen_dev *pkt_dev = NULL; 3402 int cpu = t->cpu; 3403 3404 BUG_ON(smp_processor_id() != cpu); 3405 3406 init_waitqueue_head(&t->queue); 3407 complete(&t->start_done); 3408 3409 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); 3410 3411 set_current_state(TASK_INTERRUPTIBLE); 3412 3413 set_freezable(); 3414 3415 while (!kthread_should_stop()) { 3416 pkt_dev = next_to_run(t); 3417 3418 if (unlikely(!pkt_dev && t->control == 0)) { 3419 if (pktgen_exiting) 3420 break; 3421 wait_event_interruptible_timeout(t->queue, 3422 t->control != 0, 3423 HZ/10); 3424 try_to_freeze(); 3425 continue; 3426 } 3427 3428 __set_current_state(TASK_RUNNING); 3429 3430 if (likely(pkt_dev)) { 3431 pktgen_xmit(pkt_dev); 3432 3433 if (need_resched()) 3434 pktgen_resched(pkt_dev); 3435 else 3436 cpu_relax(); 3437 } 3438 3439 if (t->control & T_STOP) { 3440 pktgen_stop(t); 3441 t->control &= ~(T_STOP); 3442 } 3443 3444 if (t->control & T_RUN) { 3445 pktgen_run(t); 3446 t->control &= ~(T_RUN); 3447 } 3448 3449 if (t->control & T_REMDEVALL) { 3450 pktgen_rem_all_ifs(t); 3451 t->control &= ~(T_REMDEVALL); 3452 } 3453 3454 if (t->control & T_REMDEV) { 3455 pktgen_rem_one_if(t); 3456 t->control &= ~(T_REMDEV); 3457 } 3458 3459 try_to_freeze(); 3460 3461 set_current_state(TASK_INTERRUPTIBLE); 3462 } 3463 3464 pr_debug("%s stopping all device\n", t->tsk->comm); 3465 pktgen_stop(t); 3466 3467 pr_debug("%s removing all device\n", t->tsk->comm); 3468 pktgen_rem_all_ifs(t); 3469 3470 pr_debug("%s removing thread\n", t->tsk->comm); 3471 pktgen_rem_thread(t); 3472 3473 /* Wait for kthread_stop */ 3474 while (!kthread_should_stop()) { 3475 set_current_state(TASK_INTERRUPTIBLE); 3476 schedule(); 3477 } 3478 __set_current_state(TASK_RUNNING); 3479 3480 return 0; 3481 } 3482 3483 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3484 const char *ifname, bool exact) 3485 { 3486 struct pktgen_dev *p, *pkt_dev = NULL; 3487 size_t len = strlen(ifname); 3488 3489 if_lock(t); 3490 list_for_each_entry(p, &t->if_list, list) 3491 if (strncmp(p->odevname, ifname, len) == 0) { 3492 if (p->odevname[len]) { 3493 if (exact || p->odevname[len] != '@') 3494 continue; 3495 } 3496 pkt_dev = p; 3497 break; 3498 } 3499 3500 if_unlock(t); 3501 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev); 3502 return pkt_dev; 3503 } 3504 3505 /* 3506 * Adds a dev at front of if_list. 3507 */ 3508 3509 static int add_dev_to_thread(struct pktgen_thread *t, 3510 struct pktgen_dev *pkt_dev) 3511 { 3512 int rv = 0; 3513 3514 if_lock(t); 3515 3516 if (pkt_dev->pg_thread) { 3517 pr_err("ERROR: already assigned to a thread\n"); 3518 rv = -EBUSY; 3519 goto out; 3520 } 3521 3522 list_add(&pkt_dev->list, &t->if_list); 3523 pkt_dev->pg_thread = t; 3524 pkt_dev->running = 0; 3525 3526 out: 3527 if_unlock(t); 3528 return rv; 3529 } 3530 3531 /* Called under thread lock */ 3532 3533 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3534 { 3535 struct pktgen_dev *pkt_dev; 3536 int err; 3537 int node = cpu_to_node(t->cpu); 3538 3539 /* We don't allow a device to be on several threads */ 3540 3541 pkt_dev = __pktgen_NN_threads(ifname, FIND); 3542 if (pkt_dev) { 3543 pr_err("ERROR: interface already used\n"); 3544 return -EBUSY; 3545 } 3546 3547 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); 3548 if (!pkt_dev) 3549 return -ENOMEM; 3550 3551 strcpy(pkt_dev->odevname, ifname); 3552 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state), 3553 node); 3554 if (pkt_dev->flows == NULL) { 3555 kfree(pkt_dev); 3556 return -ENOMEM; 3557 } 3558 3559 pkt_dev->removal_mark = 0; 3560 pkt_dev->min_pkt_size = ETH_ZLEN; 3561 pkt_dev->max_pkt_size = ETH_ZLEN; 3562 pkt_dev->nfrags = 0; 3563 pkt_dev->delay = pg_delay_d; 3564 pkt_dev->count = pg_count_d; 3565 pkt_dev->sofar = 0; 3566 pkt_dev->udp_src_min = 9; /* sink port */ 3567 pkt_dev->udp_src_max = 9; 3568 pkt_dev->udp_dst_min = 9; 3569 pkt_dev->udp_dst_max = 9; 3570 pkt_dev->vlan_p = 0; 3571 pkt_dev->vlan_cfi = 0; 3572 pkt_dev->vlan_id = 0xffff; 3573 pkt_dev->svlan_p = 0; 3574 pkt_dev->svlan_cfi = 0; 3575 pkt_dev->svlan_id = 0xffff; 3576 pkt_dev->node = -1; 3577 3578 err = pktgen_setup_dev(pkt_dev, ifname); 3579 if (err) 3580 goto out1; 3581 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING) 3582 pkt_dev->clone_skb = pg_clone_skb_d; 3583 3584 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir, 3585 &pktgen_if_fops, pkt_dev); 3586 if (!pkt_dev->entry) { 3587 pr_err("cannot create %s/%s procfs entry\n", 3588 PG_PROC_DIR, ifname); 3589 err = -EINVAL; 3590 goto out2; 3591 } 3592 #ifdef CONFIG_XFRM 3593 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3594 pkt_dev->ipsproto = IPPROTO_ESP; 3595 #endif 3596 3597 return add_dev_to_thread(t, pkt_dev); 3598 out2: 3599 dev_put(pkt_dev->odev); 3600 out1: 3601 #ifdef CONFIG_XFRM 3602 free_SAs(pkt_dev); 3603 #endif 3604 vfree(pkt_dev->flows); 3605 kfree(pkt_dev); 3606 return err; 3607 } 3608 3609 static int __init pktgen_create_thread(int cpu) 3610 { 3611 struct pktgen_thread *t; 3612 struct proc_dir_entry *pe; 3613 struct task_struct *p; 3614 3615 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL, 3616 cpu_to_node(cpu)); 3617 if (!t) { 3618 pr_err("ERROR: out of memory, can't create new thread\n"); 3619 return -ENOMEM; 3620 } 3621 3622 spin_lock_init(&t->if_lock); 3623 t->cpu = cpu; 3624 3625 INIT_LIST_HEAD(&t->if_list); 3626 3627 list_add_tail(&t->th_list, &pktgen_threads); 3628 init_completion(&t->start_done); 3629 3630 p = kthread_create_on_node(pktgen_thread_worker, 3631 t, 3632 cpu_to_node(cpu), 3633 "kpktgend_%d", cpu); 3634 if (IS_ERR(p)) { 3635 pr_err("kernel_thread() failed for cpu %d\n", t->cpu); 3636 list_del(&t->th_list); 3637 kfree(t); 3638 return PTR_ERR(p); 3639 } 3640 kthread_bind(p, cpu); 3641 t->tsk = p; 3642 3643 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir, 3644 &pktgen_thread_fops, t); 3645 if (!pe) { 3646 pr_err("cannot create %s/%s procfs entry\n", 3647 PG_PROC_DIR, t->tsk->comm); 3648 kthread_stop(p); 3649 list_del(&t->th_list); 3650 kfree(t); 3651 return -EINVAL; 3652 } 3653 3654 wake_up_process(p); 3655 wait_for_completion(&t->start_done); 3656 3657 return 0; 3658 } 3659 3660 /* 3661 * Removes a device from the thread if_list. 3662 */ 3663 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3664 struct pktgen_dev *pkt_dev) 3665 { 3666 struct list_head *q, *n; 3667 struct pktgen_dev *p; 3668 3669 list_for_each_safe(q, n, &t->if_list) { 3670 p = list_entry(q, struct pktgen_dev, list); 3671 if (p == pkt_dev) 3672 list_del(&p->list); 3673 } 3674 } 3675 3676 static int pktgen_remove_device(struct pktgen_thread *t, 3677 struct pktgen_dev *pkt_dev) 3678 { 3679 3680 pr_debug("remove_device pkt_dev=%p\n", pkt_dev); 3681 3682 if (pkt_dev->running) { 3683 pr_warning("WARNING: trying to remove a running interface, stopping it now\n"); 3684 pktgen_stop_device(pkt_dev); 3685 } 3686 3687 /* Dis-associate from the interface */ 3688 3689 if (pkt_dev->odev) { 3690 dev_put(pkt_dev->odev); 3691 pkt_dev->odev = NULL; 3692 } 3693 3694 /* And update the thread if_list */ 3695 3696 _rem_dev_from_if_list(t, pkt_dev); 3697 3698 if (pkt_dev->entry) 3699 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 3700 3701 #ifdef CONFIG_XFRM 3702 free_SAs(pkt_dev); 3703 #endif 3704 vfree(pkt_dev->flows); 3705 if (pkt_dev->page) 3706 put_page(pkt_dev->page); 3707 kfree(pkt_dev); 3708 return 0; 3709 } 3710 3711 static int __init pg_init(void) 3712 { 3713 int cpu; 3714 struct proc_dir_entry *pe; 3715 int ret = 0; 3716 3717 pr_info("%s", version); 3718 3719 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net); 3720 if (!pg_proc_dir) 3721 return -ENODEV; 3722 3723 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops); 3724 if (pe == NULL) { 3725 pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL); 3726 ret = -EINVAL; 3727 goto remove_dir; 3728 } 3729 3730 register_netdevice_notifier(&pktgen_notifier_block); 3731 3732 for_each_online_cpu(cpu) { 3733 int err; 3734 3735 err = pktgen_create_thread(cpu); 3736 if (err) 3737 pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n", 3738 cpu, err); 3739 } 3740 3741 if (list_empty(&pktgen_threads)) { 3742 pr_err("ERROR: Initialization failed for all threads\n"); 3743 ret = -ENODEV; 3744 goto unregister; 3745 } 3746 3747 return 0; 3748 3749 unregister: 3750 unregister_netdevice_notifier(&pktgen_notifier_block); 3751 remove_proc_entry(PGCTRL, pg_proc_dir); 3752 remove_dir: 3753 proc_net_remove(&init_net, PG_PROC_DIR); 3754 return ret; 3755 } 3756 3757 static void __exit pg_cleanup(void) 3758 { 3759 struct pktgen_thread *t; 3760 struct list_head *q, *n; 3761 3762 /* Stop all interfaces & threads */ 3763 pktgen_exiting = true; 3764 3765 list_for_each_safe(q, n, &pktgen_threads) { 3766 t = list_entry(q, struct pktgen_thread, th_list); 3767 kthread_stop(t->tsk); 3768 kfree(t); 3769 } 3770 3771 /* Un-register us from receiving netdevice events */ 3772 unregister_netdevice_notifier(&pktgen_notifier_block); 3773 3774 /* Clean up proc file system */ 3775 remove_proc_entry(PGCTRL, pg_proc_dir); 3776 proc_net_remove(&init_net, PG_PROC_DIR); 3777 } 3778 3779 module_init(pg_init); 3780 module_exit(pg_cleanup); 3781 3782 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); 3783 MODULE_DESCRIPTION("Packet Generator tool"); 3784 MODULE_LICENSE("GPL"); 3785 MODULE_VERSION(VERSION); 3786 module_param(pg_count_d, int, 0); 3787 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); 3788 module_param(pg_delay_d, int, 0); 3789 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); 3790 module_param(pg_clone_skb_d, int, 0); 3791 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); 3792 module_param(debug, int, 0); 3793 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); 3794