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 1074 i += len; 1075 pkt_dev->clone_skb = value; 1076 1077 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1078 return count; 1079 } 1080 if (!strcmp(name, "count")) { 1081 len = num_arg(&user_buffer[i], 10, &value); 1082 if (len < 0) 1083 return len; 1084 1085 i += len; 1086 pkt_dev->count = value; 1087 sprintf(pg_result, "OK: count=%llu", 1088 (unsigned long long)pkt_dev->count); 1089 return count; 1090 } 1091 if (!strcmp(name, "src_mac_count")) { 1092 len = num_arg(&user_buffer[i], 10, &value); 1093 if (len < 0) 1094 return len; 1095 1096 i += len; 1097 if (pkt_dev->src_mac_count != value) { 1098 pkt_dev->src_mac_count = value; 1099 pkt_dev->cur_src_mac_offset = 0; 1100 } 1101 sprintf(pg_result, "OK: src_mac_count=%d", 1102 pkt_dev->src_mac_count); 1103 return count; 1104 } 1105 if (!strcmp(name, "dst_mac_count")) { 1106 len = num_arg(&user_buffer[i], 10, &value); 1107 if (len < 0) 1108 return len; 1109 1110 i += len; 1111 if (pkt_dev->dst_mac_count != value) { 1112 pkt_dev->dst_mac_count = value; 1113 pkt_dev->cur_dst_mac_offset = 0; 1114 } 1115 sprintf(pg_result, "OK: dst_mac_count=%d", 1116 pkt_dev->dst_mac_count); 1117 return count; 1118 } 1119 if (!strcmp(name, "node")) { 1120 len = num_arg(&user_buffer[i], 10, &value); 1121 if (len < 0) 1122 return len; 1123 1124 i += len; 1125 1126 if (node_possible(value)) { 1127 pkt_dev->node = value; 1128 sprintf(pg_result, "OK: node=%d", pkt_dev->node); 1129 if (pkt_dev->page) { 1130 put_page(pkt_dev->page); 1131 pkt_dev->page = NULL; 1132 } 1133 } 1134 else 1135 sprintf(pg_result, "ERROR: node not possible"); 1136 return count; 1137 } 1138 if (!strcmp(name, "flag")) { 1139 char f[32]; 1140 memset(f, 0, 32); 1141 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1142 if (len < 0) 1143 return len; 1144 1145 if (copy_from_user(f, &user_buffer[i], len)) 1146 return -EFAULT; 1147 i += len; 1148 if (strcmp(f, "IPSRC_RND") == 0) 1149 pkt_dev->flags |= F_IPSRC_RND; 1150 1151 else if (strcmp(f, "!IPSRC_RND") == 0) 1152 pkt_dev->flags &= ~F_IPSRC_RND; 1153 1154 else if (strcmp(f, "TXSIZE_RND") == 0) 1155 pkt_dev->flags |= F_TXSIZE_RND; 1156 1157 else if (strcmp(f, "!TXSIZE_RND") == 0) 1158 pkt_dev->flags &= ~F_TXSIZE_RND; 1159 1160 else if (strcmp(f, "IPDST_RND") == 0) 1161 pkt_dev->flags |= F_IPDST_RND; 1162 1163 else if (strcmp(f, "!IPDST_RND") == 0) 1164 pkt_dev->flags &= ~F_IPDST_RND; 1165 1166 else if (strcmp(f, "UDPSRC_RND") == 0) 1167 pkt_dev->flags |= F_UDPSRC_RND; 1168 1169 else if (strcmp(f, "!UDPSRC_RND") == 0) 1170 pkt_dev->flags &= ~F_UDPSRC_RND; 1171 1172 else if (strcmp(f, "UDPDST_RND") == 0) 1173 pkt_dev->flags |= F_UDPDST_RND; 1174 1175 else if (strcmp(f, "!UDPDST_RND") == 0) 1176 pkt_dev->flags &= ~F_UDPDST_RND; 1177 1178 else if (strcmp(f, "MACSRC_RND") == 0) 1179 pkt_dev->flags |= F_MACSRC_RND; 1180 1181 else if (strcmp(f, "!MACSRC_RND") == 0) 1182 pkt_dev->flags &= ~F_MACSRC_RND; 1183 1184 else if (strcmp(f, "MACDST_RND") == 0) 1185 pkt_dev->flags |= F_MACDST_RND; 1186 1187 else if (strcmp(f, "!MACDST_RND") == 0) 1188 pkt_dev->flags &= ~F_MACDST_RND; 1189 1190 else if (strcmp(f, "MPLS_RND") == 0) 1191 pkt_dev->flags |= F_MPLS_RND; 1192 1193 else if (strcmp(f, "!MPLS_RND") == 0) 1194 pkt_dev->flags &= ~F_MPLS_RND; 1195 1196 else if (strcmp(f, "VID_RND") == 0) 1197 pkt_dev->flags |= F_VID_RND; 1198 1199 else if (strcmp(f, "!VID_RND") == 0) 1200 pkt_dev->flags &= ~F_VID_RND; 1201 1202 else if (strcmp(f, "SVID_RND") == 0) 1203 pkt_dev->flags |= F_SVID_RND; 1204 1205 else if (strcmp(f, "!SVID_RND") == 0) 1206 pkt_dev->flags &= ~F_SVID_RND; 1207 1208 else if (strcmp(f, "FLOW_SEQ") == 0) 1209 pkt_dev->flags |= F_FLOW_SEQ; 1210 1211 else if (strcmp(f, "QUEUE_MAP_RND") == 0) 1212 pkt_dev->flags |= F_QUEUE_MAP_RND; 1213 1214 else if (strcmp(f, "!QUEUE_MAP_RND") == 0) 1215 pkt_dev->flags &= ~F_QUEUE_MAP_RND; 1216 1217 else if (strcmp(f, "QUEUE_MAP_CPU") == 0) 1218 pkt_dev->flags |= F_QUEUE_MAP_CPU; 1219 1220 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0) 1221 pkt_dev->flags &= ~F_QUEUE_MAP_CPU; 1222 #ifdef CONFIG_XFRM 1223 else if (strcmp(f, "IPSEC") == 0) 1224 pkt_dev->flags |= F_IPSEC_ON; 1225 #endif 1226 1227 else if (strcmp(f, "!IPV6") == 0) 1228 pkt_dev->flags &= ~F_IPV6; 1229 1230 else if (strcmp(f, "NODE_ALLOC") == 0) 1231 pkt_dev->flags |= F_NODE; 1232 1233 else if (strcmp(f, "!NODE_ALLOC") == 0) 1234 pkt_dev->flags &= ~F_NODE; 1235 1236 else { 1237 sprintf(pg_result, 1238 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1239 f, 1240 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1241 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n"); 1242 return count; 1243 } 1244 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1245 return count; 1246 } 1247 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1248 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1249 if (len < 0) 1250 return len; 1251 1252 if (copy_from_user(buf, &user_buffer[i], len)) 1253 return -EFAULT; 1254 buf[len] = 0; 1255 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1256 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1257 strncpy(pkt_dev->dst_min, buf, len); 1258 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1259 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1260 } 1261 if (debug) 1262 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n", 1263 pkt_dev->dst_min); 1264 i += len; 1265 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1266 return count; 1267 } 1268 if (!strcmp(name, "dst_max")) { 1269 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1270 if (len < 0) 1271 return len; 1272 1273 1274 if (copy_from_user(buf, &user_buffer[i], len)) 1275 return -EFAULT; 1276 1277 buf[len] = 0; 1278 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1279 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1280 strncpy(pkt_dev->dst_max, buf, len); 1281 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1282 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1283 } 1284 if (debug) 1285 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n", 1286 pkt_dev->dst_max); 1287 i += len; 1288 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1289 return count; 1290 } 1291 if (!strcmp(name, "dst6")) { 1292 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1293 if (len < 0) 1294 return len; 1295 1296 pkt_dev->flags |= F_IPV6; 1297 1298 if (copy_from_user(buf, &user_buffer[i], len)) 1299 return -EFAULT; 1300 buf[len] = 0; 1301 1302 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1303 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr); 1304 1305 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr); 1306 1307 if (debug) 1308 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf); 1309 1310 i += len; 1311 sprintf(pg_result, "OK: dst6=%s", buf); 1312 return count; 1313 } 1314 if (!strcmp(name, "dst6_min")) { 1315 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1316 if (len < 0) 1317 return len; 1318 1319 pkt_dev->flags |= F_IPV6; 1320 1321 if (copy_from_user(buf, &user_buffer[i], len)) 1322 return -EFAULT; 1323 buf[len] = 0; 1324 1325 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1326 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr); 1327 1328 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, 1329 &pkt_dev->min_in6_daddr); 1330 if (debug) 1331 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf); 1332 1333 i += len; 1334 sprintf(pg_result, "OK: dst6_min=%s", buf); 1335 return count; 1336 } 1337 if (!strcmp(name, "dst6_max")) { 1338 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1339 if (len < 0) 1340 return len; 1341 1342 pkt_dev->flags |= F_IPV6; 1343 1344 if (copy_from_user(buf, &user_buffer[i], len)) 1345 return -EFAULT; 1346 buf[len] = 0; 1347 1348 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1349 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr); 1350 1351 if (debug) 1352 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf); 1353 1354 i += len; 1355 sprintf(pg_result, "OK: dst6_max=%s", buf); 1356 return count; 1357 } 1358 if (!strcmp(name, "src6")) { 1359 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1360 if (len < 0) 1361 return len; 1362 1363 pkt_dev->flags |= F_IPV6; 1364 1365 if (copy_from_user(buf, &user_buffer[i], len)) 1366 return -EFAULT; 1367 buf[len] = 0; 1368 1369 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1370 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr); 1371 1372 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr); 1373 1374 if (debug) 1375 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf); 1376 1377 i += len; 1378 sprintf(pg_result, "OK: src6=%s", buf); 1379 return count; 1380 } 1381 if (!strcmp(name, "src_min")) { 1382 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1383 if (len < 0) 1384 return len; 1385 1386 if (copy_from_user(buf, &user_buffer[i], len)) 1387 return -EFAULT; 1388 buf[len] = 0; 1389 if (strcmp(buf, pkt_dev->src_min) != 0) { 1390 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1391 strncpy(pkt_dev->src_min, buf, len); 1392 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1393 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1394 } 1395 if (debug) 1396 printk(KERN_DEBUG "pktgen: src_min set to: %s\n", 1397 pkt_dev->src_min); 1398 i += len; 1399 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1400 return count; 1401 } 1402 if (!strcmp(name, "src_max")) { 1403 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1404 if (len < 0) 1405 return len; 1406 1407 if (copy_from_user(buf, &user_buffer[i], len)) 1408 return -EFAULT; 1409 buf[len] = 0; 1410 if (strcmp(buf, pkt_dev->src_max) != 0) { 1411 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1412 strncpy(pkt_dev->src_max, buf, len); 1413 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1414 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1415 } 1416 if (debug) 1417 printk(KERN_DEBUG "pktgen: src_max set to: %s\n", 1418 pkt_dev->src_max); 1419 i += len; 1420 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1421 return count; 1422 } 1423 if (!strcmp(name, "dst_mac")) { 1424 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1425 if (len < 0) 1426 return len; 1427 1428 memset(valstr, 0, sizeof(valstr)); 1429 if (copy_from_user(valstr, &user_buffer[i], len)) 1430 return -EFAULT; 1431 1432 if (!mac_pton(valstr, pkt_dev->dst_mac)) 1433 return -EINVAL; 1434 /* Set up Dest MAC */ 1435 memcpy(&pkt_dev->hh[0], pkt_dev->dst_mac, ETH_ALEN); 1436 1437 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac); 1438 return count; 1439 } 1440 if (!strcmp(name, "src_mac")) { 1441 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1442 if (len < 0) 1443 return len; 1444 1445 memset(valstr, 0, sizeof(valstr)); 1446 if (copy_from_user(valstr, &user_buffer[i], len)) 1447 return -EFAULT; 1448 1449 if (!mac_pton(valstr, pkt_dev->src_mac)) 1450 return -EINVAL; 1451 /* Set up Src MAC */ 1452 memcpy(&pkt_dev->hh[6], pkt_dev->src_mac, ETH_ALEN); 1453 1454 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac); 1455 return count; 1456 } 1457 1458 if (!strcmp(name, "clear_counters")) { 1459 pktgen_clear_counters(pkt_dev); 1460 sprintf(pg_result, "OK: Clearing counters.\n"); 1461 return count; 1462 } 1463 1464 if (!strcmp(name, "flows")) { 1465 len = num_arg(&user_buffer[i], 10, &value); 1466 if (len < 0) 1467 return len; 1468 1469 i += len; 1470 if (value > MAX_CFLOWS) 1471 value = MAX_CFLOWS; 1472 1473 pkt_dev->cflows = value; 1474 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1475 return count; 1476 } 1477 1478 if (!strcmp(name, "flowlen")) { 1479 len = num_arg(&user_buffer[i], 10, &value); 1480 if (len < 0) 1481 return len; 1482 1483 i += len; 1484 pkt_dev->lflow = value; 1485 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1486 return count; 1487 } 1488 1489 if (!strcmp(name, "queue_map_min")) { 1490 len = num_arg(&user_buffer[i], 5, &value); 1491 if (len < 0) 1492 return len; 1493 1494 i += len; 1495 pkt_dev->queue_map_min = value; 1496 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1497 return count; 1498 } 1499 1500 if (!strcmp(name, "queue_map_max")) { 1501 len = num_arg(&user_buffer[i], 5, &value); 1502 if (len < 0) 1503 return len; 1504 1505 i += len; 1506 pkt_dev->queue_map_max = value; 1507 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1508 return count; 1509 } 1510 1511 if (!strcmp(name, "mpls")) { 1512 unsigned n, cnt; 1513 1514 len = get_labels(&user_buffer[i], pkt_dev); 1515 if (len < 0) 1516 return len; 1517 i += len; 1518 cnt = sprintf(pg_result, "OK: mpls="); 1519 for (n = 0; n < pkt_dev->nr_labels; n++) 1520 cnt += sprintf(pg_result + cnt, 1521 "%08x%s", ntohl(pkt_dev->labels[n]), 1522 n == pkt_dev->nr_labels-1 ? "" : ","); 1523 1524 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1525 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1526 pkt_dev->svlan_id = 0xffff; 1527 1528 if (debug) 1529 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n"); 1530 } 1531 return count; 1532 } 1533 1534 if (!strcmp(name, "vlan_id")) { 1535 len = num_arg(&user_buffer[i], 4, &value); 1536 if (len < 0) 1537 return len; 1538 1539 i += len; 1540 if (value <= 4095) { 1541 pkt_dev->vlan_id = value; /* turn on VLAN */ 1542 1543 if (debug) 1544 printk(KERN_DEBUG "pktgen: VLAN turned on\n"); 1545 1546 if (debug && pkt_dev->nr_labels) 1547 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1548 1549 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1550 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1551 } else { 1552 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1553 pkt_dev->svlan_id = 0xffff; 1554 1555 if (debug) 1556 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1557 } 1558 return count; 1559 } 1560 1561 if (!strcmp(name, "vlan_p")) { 1562 len = num_arg(&user_buffer[i], 1, &value); 1563 if (len < 0) 1564 return len; 1565 1566 i += len; 1567 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1568 pkt_dev->vlan_p = value; 1569 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1570 } else { 1571 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1572 } 1573 return count; 1574 } 1575 1576 if (!strcmp(name, "vlan_cfi")) { 1577 len = num_arg(&user_buffer[i], 1, &value); 1578 if (len < 0) 1579 return len; 1580 1581 i += len; 1582 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1583 pkt_dev->vlan_cfi = value; 1584 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1585 } else { 1586 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1587 } 1588 return count; 1589 } 1590 1591 if (!strcmp(name, "svlan_id")) { 1592 len = num_arg(&user_buffer[i], 4, &value); 1593 if (len < 0) 1594 return len; 1595 1596 i += len; 1597 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1598 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1599 1600 if (debug) 1601 printk(KERN_DEBUG "pktgen: SVLAN turned on\n"); 1602 1603 if (debug && pkt_dev->nr_labels) 1604 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1605 1606 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1607 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1608 } else { 1609 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1610 pkt_dev->svlan_id = 0xffff; 1611 1612 if (debug) 1613 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1614 } 1615 return count; 1616 } 1617 1618 if (!strcmp(name, "svlan_p")) { 1619 len = num_arg(&user_buffer[i], 1, &value); 1620 if (len < 0) 1621 return len; 1622 1623 i += len; 1624 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1625 pkt_dev->svlan_p = value; 1626 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1627 } else { 1628 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1629 } 1630 return count; 1631 } 1632 1633 if (!strcmp(name, "svlan_cfi")) { 1634 len = num_arg(&user_buffer[i], 1, &value); 1635 if (len < 0) 1636 return len; 1637 1638 i += len; 1639 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1640 pkt_dev->svlan_cfi = value; 1641 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1642 } else { 1643 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1644 } 1645 return count; 1646 } 1647 1648 if (!strcmp(name, "tos")) { 1649 __u32 tmp_value = 0; 1650 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1651 if (len < 0) 1652 return len; 1653 1654 i += len; 1655 if (len == 2) { 1656 pkt_dev->tos = tmp_value; 1657 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1658 } else { 1659 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1660 } 1661 return count; 1662 } 1663 1664 if (!strcmp(name, "traffic_class")) { 1665 __u32 tmp_value = 0; 1666 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1667 if (len < 0) 1668 return len; 1669 1670 i += len; 1671 if (len == 2) { 1672 pkt_dev->traffic_class = tmp_value; 1673 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1674 } else { 1675 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1676 } 1677 return count; 1678 } 1679 1680 if (!strcmp(name, "skb_priority")) { 1681 len = num_arg(&user_buffer[i], 9, &value); 1682 if (len < 0) 1683 return len; 1684 1685 i += len; 1686 pkt_dev->skb_priority = value; 1687 sprintf(pg_result, "OK: skb_priority=%i", 1688 pkt_dev->skb_priority); 1689 return count; 1690 } 1691 1692 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1693 return -EINVAL; 1694 } 1695 1696 static int pktgen_if_open(struct inode *inode, struct file *file) 1697 { 1698 return single_open(file, pktgen_if_show, PDE(inode)->data); 1699 } 1700 1701 static const struct file_operations pktgen_if_fops = { 1702 .owner = THIS_MODULE, 1703 .open = pktgen_if_open, 1704 .read = seq_read, 1705 .llseek = seq_lseek, 1706 .write = pktgen_if_write, 1707 .release = single_release, 1708 }; 1709 1710 static int pktgen_thread_show(struct seq_file *seq, void *v) 1711 { 1712 struct pktgen_thread *t = seq->private; 1713 const struct pktgen_dev *pkt_dev; 1714 1715 BUG_ON(!t); 1716 1717 seq_printf(seq, "Running: "); 1718 1719 if_lock(t); 1720 list_for_each_entry(pkt_dev, &t->if_list, list) 1721 if (pkt_dev->running) 1722 seq_printf(seq, "%s ", pkt_dev->odevname); 1723 1724 seq_printf(seq, "\nStopped: "); 1725 1726 list_for_each_entry(pkt_dev, &t->if_list, list) 1727 if (!pkt_dev->running) 1728 seq_printf(seq, "%s ", pkt_dev->odevname); 1729 1730 if (t->result[0]) 1731 seq_printf(seq, "\nResult: %s\n", t->result); 1732 else 1733 seq_printf(seq, "\nResult: NA\n"); 1734 1735 if_unlock(t); 1736 1737 return 0; 1738 } 1739 1740 static ssize_t pktgen_thread_write(struct file *file, 1741 const char __user * user_buffer, 1742 size_t count, loff_t * offset) 1743 { 1744 struct seq_file *seq = file->private_data; 1745 struct pktgen_thread *t = seq->private; 1746 int i, max, len, ret; 1747 char name[40]; 1748 char *pg_result; 1749 1750 if (count < 1) { 1751 // sprintf(pg_result, "Wrong command format"); 1752 return -EINVAL; 1753 } 1754 1755 max = count; 1756 len = count_trail_chars(user_buffer, max); 1757 if (len < 0) 1758 return len; 1759 1760 i = len; 1761 1762 /* Read variable name */ 1763 1764 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1765 if (len < 0) 1766 return len; 1767 1768 memset(name, 0, sizeof(name)); 1769 if (copy_from_user(name, &user_buffer[i], len)) 1770 return -EFAULT; 1771 i += len; 1772 1773 max = count - i; 1774 len = count_trail_chars(&user_buffer[i], max); 1775 if (len < 0) 1776 return len; 1777 1778 i += len; 1779 1780 if (debug) 1781 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n", 1782 name, (unsigned long)count); 1783 1784 if (!t) { 1785 pr_err("ERROR: No thread\n"); 1786 ret = -EINVAL; 1787 goto out; 1788 } 1789 1790 pg_result = &(t->result[0]); 1791 1792 if (!strcmp(name, "add_device")) { 1793 char f[32]; 1794 memset(f, 0, 32); 1795 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1796 if (len < 0) { 1797 ret = len; 1798 goto out; 1799 } 1800 if (copy_from_user(f, &user_buffer[i], len)) 1801 return -EFAULT; 1802 i += len; 1803 mutex_lock(&pktgen_thread_lock); 1804 pktgen_add_device(t, f); 1805 mutex_unlock(&pktgen_thread_lock); 1806 ret = count; 1807 sprintf(pg_result, "OK: add_device=%s", f); 1808 goto out; 1809 } 1810 1811 if (!strcmp(name, "rem_device_all")) { 1812 mutex_lock(&pktgen_thread_lock); 1813 t->control |= T_REMDEVALL; 1814 mutex_unlock(&pktgen_thread_lock); 1815 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1816 ret = count; 1817 sprintf(pg_result, "OK: rem_device_all"); 1818 goto out; 1819 } 1820 1821 if (!strcmp(name, "max_before_softirq")) { 1822 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1823 ret = count; 1824 goto out; 1825 } 1826 1827 ret = -EINVAL; 1828 out: 1829 return ret; 1830 } 1831 1832 static int pktgen_thread_open(struct inode *inode, struct file *file) 1833 { 1834 return single_open(file, pktgen_thread_show, PDE(inode)->data); 1835 } 1836 1837 static const struct file_operations pktgen_thread_fops = { 1838 .owner = THIS_MODULE, 1839 .open = pktgen_thread_open, 1840 .read = seq_read, 1841 .llseek = seq_lseek, 1842 .write = pktgen_thread_write, 1843 .release = single_release, 1844 }; 1845 1846 /* Think find or remove for NN */ 1847 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove) 1848 { 1849 struct pktgen_thread *t; 1850 struct pktgen_dev *pkt_dev = NULL; 1851 bool exact = (remove == FIND); 1852 1853 list_for_each_entry(t, &pktgen_threads, th_list) { 1854 pkt_dev = pktgen_find_dev(t, ifname, exact); 1855 if (pkt_dev) { 1856 if (remove) { 1857 if_lock(t); 1858 pkt_dev->removal_mark = 1; 1859 t->control |= T_REMDEV; 1860 if_unlock(t); 1861 } 1862 break; 1863 } 1864 } 1865 return pkt_dev; 1866 } 1867 1868 /* 1869 * mark a device for removal 1870 */ 1871 static void pktgen_mark_device(const char *ifname) 1872 { 1873 struct pktgen_dev *pkt_dev = NULL; 1874 const int max_tries = 10, msec_per_try = 125; 1875 int i = 0; 1876 1877 mutex_lock(&pktgen_thread_lock); 1878 pr_debug("%s: marking %s for removal\n", __func__, ifname); 1879 1880 while (1) { 1881 1882 pkt_dev = __pktgen_NN_threads(ifname, REMOVE); 1883 if (pkt_dev == NULL) 1884 break; /* success */ 1885 1886 mutex_unlock(&pktgen_thread_lock); 1887 pr_debug("%s: waiting for %s to disappear....\n", 1888 __func__, ifname); 1889 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1890 mutex_lock(&pktgen_thread_lock); 1891 1892 if (++i >= max_tries) { 1893 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n", 1894 __func__, msec_per_try * i, ifname); 1895 break; 1896 } 1897 1898 } 1899 1900 mutex_unlock(&pktgen_thread_lock); 1901 } 1902 1903 static void pktgen_change_name(struct net_device *dev) 1904 { 1905 struct pktgen_thread *t; 1906 1907 list_for_each_entry(t, &pktgen_threads, th_list) { 1908 struct pktgen_dev *pkt_dev; 1909 1910 list_for_each_entry(pkt_dev, &t->if_list, list) { 1911 if (pkt_dev->odev != dev) 1912 continue; 1913 1914 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 1915 1916 pkt_dev->entry = proc_create_data(dev->name, 0600, 1917 pg_proc_dir, 1918 &pktgen_if_fops, 1919 pkt_dev); 1920 if (!pkt_dev->entry) 1921 pr_err("can't move proc entry for '%s'\n", 1922 dev->name); 1923 break; 1924 } 1925 } 1926 } 1927 1928 static int pktgen_device_event(struct notifier_block *unused, 1929 unsigned long event, void *ptr) 1930 { 1931 struct net_device *dev = ptr; 1932 1933 if (!net_eq(dev_net(dev), &init_net)) 1934 return NOTIFY_DONE; 1935 1936 /* It is OK that we do not hold the group lock right now, 1937 * as we run under the RTNL lock. 1938 */ 1939 1940 switch (event) { 1941 case NETDEV_CHANGENAME: 1942 pktgen_change_name(dev); 1943 break; 1944 1945 case NETDEV_UNREGISTER: 1946 pktgen_mark_device(dev->name); 1947 break; 1948 } 1949 1950 return NOTIFY_DONE; 1951 } 1952 1953 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev, 1954 const char *ifname) 1955 { 1956 char b[IFNAMSIZ+5]; 1957 int i; 1958 1959 for (i = 0; ifname[i] != '@'; i++) { 1960 if (i == IFNAMSIZ) 1961 break; 1962 1963 b[i] = ifname[i]; 1964 } 1965 b[i] = 0; 1966 1967 return dev_get_by_name(&init_net, b); 1968 } 1969 1970 1971 /* Associate pktgen_dev with a device. */ 1972 1973 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname) 1974 { 1975 struct net_device *odev; 1976 int err; 1977 1978 /* Clean old setups */ 1979 if (pkt_dev->odev) { 1980 dev_put(pkt_dev->odev); 1981 pkt_dev->odev = NULL; 1982 } 1983 1984 odev = pktgen_dev_get_by_name(pkt_dev, ifname); 1985 if (!odev) { 1986 pr_err("no such netdevice: \"%s\"\n", ifname); 1987 return -ENODEV; 1988 } 1989 1990 if (odev->type != ARPHRD_ETHER) { 1991 pr_err("not an ethernet device: \"%s\"\n", ifname); 1992 err = -EINVAL; 1993 } else if (!netif_running(odev)) { 1994 pr_err("device is down: \"%s\"\n", ifname); 1995 err = -ENETDOWN; 1996 } else { 1997 pkt_dev->odev = odev; 1998 return 0; 1999 } 2000 2001 dev_put(odev); 2002 return err; 2003 } 2004 2005 /* Read pkt_dev from the interface and set up internal pktgen_dev 2006 * structure to have the right information to create/send packets 2007 */ 2008 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 2009 { 2010 int ntxq; 2011 2012 if (!pkt_dev->odev) { 2013 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n"); 2014 sprintf(pkt_dev->result, 2015 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 2016 return; 2017 } 2018 2019 /* make sure that we don't pick a non-existing transmit queue */ 2020 ntxq = pkt_dev->odev->real_num_tx_queues; 2021 2022 if (ntxq <= pkt_dev->queue_map_min) { 2023 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2024 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, 2025 pkt_dev->odevname); 2026 pkt_dev->queue_map_min = ntxq - 1; 2027 } 2028 if (pkt_dev->queue_map_max >= ntxq) { 2029 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2030 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, 2031 pkt_dev->odevname); 2032 pkt_dev->queue_map_max = ntxq - 1; 2033 } 2034 2035 /* Default to the interface's mac if not explicitly set. */ 2036 2037 if (is_zero_ether_addr(pkt_dev->src_mac)) 2038 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN); 2039 2040 /* Set up Dest MAC */ 2041 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 2042 2043 /* Set up pkt size */ 2044 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2045 2046 if (pkt_dev->flags & F_IPV6) { 2047 /* 2048 * Skip this automatic address setting until locks or functions 2049 * gets exported 2050 */ 2051 2052 #ifdef NOTNOW 2053 int i, set = 0, err = 1; 2054 struct inet6_dev *idev; 2055 2056 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2057 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2058 set = 1; 2059 break; 2060 } 2061 2062 if (!set) { 2063 2064 /* 2065 * Use linklevel address if unconfigured. 2066 * 2067 * use ipv6_get_lladdr if/when it's get exported 2068 */ 2069 2070 rcu_read_lock(); 2071 idev = __in6_dev_get(pkt_dev->odev); 2072 if (idev) { 2073 struct inet6_ifaddr *ifp; 2074 2075 read_lock_bh(&idev->lock); 2076 for (ifp = idev->addr_list; ifp; 2077 ifp = ifp->if_next) { 2078 if (ifp->scope == IFA_LINK && 2079 !(ifp->flags & IFA_F_TENTATIVE)) { 2080 ipv6_addr_copy(&pkt_dev-> 2081 cur_in6_saddr, 2082 &ifp->addr); 2083 err = 0; 2084 break; 2085 } 2086 } 2087 read_unlock_bh(&idev->lock); 2088 } 2089 rcu_read_unlock(); 2090 if (err) 2091 pr_err("ERROR: IPv6 link address not available\n"); 2092 } 2093 #endif 2094 } else { 2095 pkt_dev->saddr_min = 0; 2096 pkt_dev->saddr_max = 0; 2097 if (strlen(pkt_dev->src_min) == 0) { 2098 2099 struct in_device *in_dev; 2100 2101 rcu_read_lock(); 2102 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2103 if (in_dev) { 2104 if (in_dev->ifa_list) { 2105 pkt_dev->saddr_min = 2106 in_dev->ifa_list->ifa_address; 2107 pkt_dev->saddr_max = pkt_dev->saddr_min; 2108 } 2109 } 2110 rcu_read_unlock(); 2111 } else { 2112 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2113 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2114 } 2115 2116 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2117 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2118 } 2119 /* Initialize current values. */ 2120 pkt_dev->cur_dst_mac_offset = 0; 2121 pkt_dev->cur_src_mac_offset = 0; 2122 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2123 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2124 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2125 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2126 pkt_dev->nflows = 0; 2127 } 2128 2129 2130 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) 2131 { 2132 ktime_t start_time, end_time; 2133 s64 remaining; 2134 struct hrtimer_sleeper t; 2135 2136 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); 2137 hrtimer_set_expires(&t.timer, spin_until); 2138 2139 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer)); 2140 if (remaining <= 0) { 2141 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2142 return; 2143 } 2144 2145 start_time = ktime_now(); 2146 if (remaining < 100000) 2147 ndelay(remaining); /* really small just spin */ 2148 else { 2149 /* see do_nanosleep */ 2150 hrtimer_init_sleeper(&t, current); 2151 do { 2152 set_current_state(TASK_INTERRUPTIBLE); 2153 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS); 2154 if (!hrtimer_active(&t.timer)) 2155 t.task = NULL; 2156 2157 if (likely(t.task)) 2158 schedule(); 2159 2160 hrtimer_cancel(&t.timer); 2161 } while (t.task && pkt_dev->running && !signal_pending(current)); 2162 __set_current_state(TASK_RUNNING); 2163 } 2164 end_time = ktime_now(); 2165 2166 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); 2167 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2168 } 2169 2170 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2171 { 2172 pkt_dev->pkt_overhead = 0; 2173 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2174 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2175 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2176 } 2177 2178 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) 2179 { 2180 return !!(pkt_dev->flows[flow].flags & F_INIT); 2181 } 2182 2183 static inline int f_pick(struct pktgen_dev *pkt_dev) 2184 { 2185 int flow = pkt_dev->curfl; 2186 2187 if (pkt_dev->flags & F_FLOW_SEQ) { 2188 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2189 /* reset time */ 2190 pkt_dev->flows[flow].count = 0; 2191 pkt_dev->flows[flow].flags = 0; 2192 pkt_dev->curfl += 1; 2193 if (pkt_dev->curfl >= pkt_dev->cflows) 2194 pkt_dev->curfl = 0; /*reset */ 2195 } 2196 } else { 2197 flow = random32() % pkt_dev->cflows; 2198 pkt_dev->curfl = flow; 2199 2200 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2201 pkt_dev->flows[flow].count = 0; 2202 pkt_dev->flows[flow].flags = 0; 2203 } 2204 } 2205 2206 return pkt_dev->curfl; 2207 } 2208 2209 2210 #ifdef CONFIG_XFRM 2211 /* If there was already an IPSEC SA, we keep it as is, else 2212 * we go look for it ... 2213 */ 2214 #define DUMMY_MARK 0 2215 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2216 { 2217 struct xfrm_state *x = pkt_dev->flows[flow].x; 2218 if (!x) { 2219 /*slow path: we dont already have xfrm_state*/ 2220 x = xfrm_stateonly_find(&init_net, DUMMY_MARK, 2221 (xfrm_address_t *)&pkt_dev->cur_daddr, 2222 (xfrm_address_t *)&pkt_dev->cur_saddr, 2223 AF_INET, 2224 pkt_dev->ipsmode, 2225 pkt_dev->ipsproto, 0); 2226 if (x) { 2227 pkt_dev->flows[flow].x = x; 2228 set_pkt_overhead(pkt_dev); 2229 pkt_dev->pkt_overhead += x->props.header_len; 2230 } 2231 2232 } 2233 } 2234 #endif 2235 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2236 { 2237 2238 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2239 pkt_dev->cur_queue_map = smp_processor_id(); 2240 2241 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { 2242 __u16 t; 2243 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2244 t = random32() % 2245 (pkt_dev->queue_map_max - 2246 pkt_dev->queue_map_min + 1) 2247 + pkt_dev->queue_map_min; 2248 } else { 2249 t = pkt_dev->cur_queue_map + 1; 2250 if (t > pkt_dev->queue_map_max) 2251 t = pkt_dev->queue_map_min; 2252 } 2253 pkt_dev->cur_queue_map = t; 2254 } 2255 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2256 } 2257 2258 /* Increment/randomize headers according to flags and current values 2259 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2260 */ 2261 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2262 { 2263 __u32 imn; 2264 __u32 imx; 2265 int flow = 0; 2266 2267 if (pkt_dev->cflows) 2268 flow = f_pick(pkt_dev); 2269 2270 /* Deal with source MAC */ 2271 if (pkt_dev->src_mac_count > 1) { 2272 __u32 mc; 2273 __u32 tmp; 2274 2275 if (pkt_dev->flags & F_MACSRC_RND) 2276 mc = random32() % pkt_dev->src_mac_count; 2277 else { 2278 mc = pkt_dev->cur_src_mac_offset++; 2279 if (pkt_dev->cur_src_mac_offset >= 2280 pkt_dev->src_mac_count) 2281 pkt_dev->cur_src_mac_offset = 0; 2282 } 2283 2284 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2285 pkt_dev->hh[11] = tmp; 2286 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2287 pkt_dev->hh[10] = tmp; 2288 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2289 pkt_dev->hh[9] = tmp; 2290 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2291 pkt_dev->hh[8] = tmp; 2292 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2293 pkt_dev->hh[7] = tmp; 2294 } 2295 2296 /* Deal with Destination MAC */ 2297 if (pkt_dev->dst_mac_count > 1) { 2298 __u32 mc; 2299 __u32 tmp; 2300 2301 if (pkt_dev->flags & F_MACDST_RND) 2302 mc = random32() % pkt_dev->dst_mac_count; 2303 2304 else { 2305 mc = pkt_dev->cur_dst_mac_offset++; 2306 if (pkt_dev->cur_dst_mac_offset >= 2307 pkt_dev->dst_mac_count) { 2308 pkt_dev->cur_dst_mac_offset = 0; 2309 } 2310 } 2311 2312 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2313 pkt_dev->hh[5] = tmp; 2314 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2315 pkt_dev->hh[4] = tmp; 2316 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2317 pkt_dev->hh[3] = tmp; 2318 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2319 pkt_dev->hh[2] = tmp; 2320 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2321 pkt_dev->hh[1] = tmp; 2322 } 2323 2324 if (pkt_dev->flags & F_MPLS_RND) { 2325 unsigned i; 2326 for (i = 0; i < pkt_dev->nr_labels; i++) 2327 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2328 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2329 ((__force __be32)random32() & 2330 htonl(0x000fffff)); 2331 } 2332 2333 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2334 pkt_dev->vlan_id = random32() & (4096-1); 2335 } 2336 2337 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2338 pkt_dev->svlan_id = random32() & (4096 - 1); 2339 } 2340 2341 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2342 if (pkt_dev->flags & F_UDPSRC_RND) 2343 pkt_dev->cur_udp_src = random32() % 2344 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2345 + pkt_dev->udp_src_min; 2346 2347 else { 2348 pkt_dev->cur_udp_src++; 2349 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2350 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2351 } 2352 } 2353 2354 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2355 if (pkt_dev->flags & F_UDPDST_RND) { 2356 pkt_dev->cur_udp_dst = random32() % 2357 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2358 + pkt_dev->udp_dst_min; 2359 } else { 2360 pkt_dev->cur_udp_dst++; 2361 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2362 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2363 } 2364 } 2365 2366 if (!(pkt_dev->flags & F_IPV6)) { 2367 2368 imn = ntohl(pkt_dev->saddr_min); 2369 imx = ntohl(pkt_dev->saddr_max); 2370 if (imn < imx) { 2371 __u32 t; 2372 if (pkt_dev->flags & F_IPSRC_RND) 2373 t = random32() % (imx - imn) + imn; 2374 else { 2375 t = ntohl(pkt_dev->cur_saddr); 2376 t++; 2377 if (t > imx) 2378 t = imn; 2379 2380 } 2381 pkt_dev->cur_saddr = htonl(t); 2382 } 2383 2384 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2385 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2386 } else { 2387 imn = ntohl(pkt_dev->daddr_min); 2388 imx = ntohl(pkt_dev->daddr_max); 2389 if (imn < imx) { 2390 __u32 t; 2391 __be32 s; 2392 if (pkt_dev->flags & F_IPDST_RND) { 2393 2394 t = random32() % (imx - imn) + imn; 2395 s = htonl(t); 2396 2397 while (ipv4_is_loopback(s) || 2398 ipv4_is_multicast(s) || 2399 ipv4_is_lbcast(s) || 2400 ipv4_is_zeronet(s) || 2401 ipv4_is_local_multicast(s)) { 2402 t = random32() % (imx - imn) + imn; 2403 s = htonl(t); 2404 } 2405 pkt_dev->cur_daddr = s; 2406 } else { 2407 t = ntohl(pkt_dev->cur_daddr); 2408 t++; 2409 if (t > imx) { 2410 t = imn; 2411 } 2412 pkt_dev->cur_daddr = htonl(t); 2413 } 2414 } 2415 if (pkt_dev->cflows) { 2416 pkt_dev->flows[flow].flags |= F_INIT; 2417 pkt_dev->flows[flow].cur_daddr = 2418 pkt_dev->cur_daddr; 2419 #ifdef CONFIG_XFRM 2420 if (pkt_dev->flags & F_IPSEC_ON) 2421 get_ipsec_sa(pkt_dev, flow); 2422 #endif 2423 pkt_dev->nflows++; 2424 } 2425 } 2426 } else { /* IPV6 * */ 2427 2428 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 && 2429 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 && 2430 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 && 2431 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ; 2432 else { 2433 int i; 2434 2435 /* Only random destinations yet */ 2436 2437 for (i = 0; i < 4; i++) { 2438 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2439 (((__force __be32)random32() | 2440 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2441 pkt_dev->max_in6_daddr.s6_addr32[i]); 2442 } 2443 } 2444 } 2445 2446 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2447 __u32 t; 2448 if (pkt_dev->flags & F_TXSIZE_RND) { 2449 t = random32() % 2450 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2451 + pkt_dev->min_pkt_size; 2452 } else { 2453 t = pkt_dev->cur_pkt_size + 1; 2454 if (t > pkt_dev->max_pkt_size) 2455 t = pkt_dev->min_pkt_size; 2456 } 2457 pkt_dev->cur_pkt_size = t; 2458 } 2459 2460 set_cur_queue_map(pkt_dev); 2461 2462 pkt_dev->flows[flow].count++; 2463 } 2464 2465 2466 #ifdef CONFIG_XFRM 2467 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2468 { 2469 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2470 int err = 0; 2471 2472 if (!x) 2473 return 0; 2474 /* XXX: we dont support tunnel mode for now until 2475 * we resolve the dst issue */ 2476 if (x->props.mode != XFRM_MODE_TRANSPORT) 2477 return 0; 2478 2479 spin_lock(&x->lock); 2480 2481 err = x->outer_mode->output(x, skb); 2482 if (err) 2483 goto error; 2484 err = x->type->output(x, skb); 2485 if (err) 2486 goto error; 2487 2488 x->curlft.bytes += skb->len; 2489 x->curlft.packets++; 2490 error: 2491 spin_unlock(&x->lock); 2492 return err; 2493 } 2494 2495 static void free_SAs(struct pktgen_dev *pkt_dev) 2496 { 2497 if (pkt_dev->cflows) { 2498 /* let go of the SAs if we have them */ 2499 int i; 2500 for (i = 0; i < pkt_dev->cflows; i++) { 2501 struct xfrm_state *x = pkt_dev->flows[i].x; 2502 if (x) { 2503 xfrm_state_put(x); 2504 pkt_dev->flows[i].x = NULL; 2505 } 2506 } 2507 } 2508 } 2509 2510 static int process_ipsec(struct pktgen_dev *pkt_dev, 2511 struct sk_buff *skb, __be16 protocol) 2512 { 2513 if (pkt_dev->flags & F_IPSEC_ON) { 2514 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2515 int nhead = 0; 2516 if (x) { 2517 int ret; 2518 __u8 *eth; 2519 nhead = x->props.header_len - skb_headroom(skb); 2520 if (nhead > 0) { 2521 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2522 if (ret < 0) { 2523 pr_err("Error expanding ipsec packet %d\n", 2524 ret); 2525 goto err; 2526 } 2527 } 2528 2529 /* ipsec is not expecting ll header */ 2530 skb_pull(skb, ETH_HLEN); 2531 ret = pktgen_output_ipsec(skb, pkt_dev); 2532 if (ret) { 2533 pr_err("Error creating ipsec packet %d\n", ret); 2534 goto err; 2535 } 2536 /* restore ll */ 2537 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2538 memcpy(eth, pkt_dev->hh, 12); 2539 *(u16 *) ð[12] = protocol; 2540 } 2541 } 2542 return 1; 2543 err: 2544 kfree_skb(skb); 2545 return 0; 2546 } 2547 #endif 2548 2549 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2550 { 2551 unsigned i; 2552 for (i = 0; i < pkt_dev->nr_labels; i++) 2553 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2554 2555 mpls--; 2556 *mpls |= MPLS_STACK_BOTTOM; 2557 } 2558 2559 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2560 unsigned int prio) 2561 { 2562 return htons(id | (cfi << 12) | (prio << 13)); 2563 } 2564 2565 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb, 2566 int datalen) 2567 { 2568 struct timeval timestamp; 2569 struct pktgen_hdr *pgh; 2570 2571 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh)); 2572 datalen -= sizeof(*pgh); 2573 2574 if (pkt_dev->nfrags <= 0) { 2575 memset(skb_put(skb, datalen), 0, datalen); 2576 } else { 2577 int frags = pkt_dev->nfrags; 2578 int i, len; 2579 int frag_len; 2580 2581 2582 if (frags > MAX_SKB_FRAGS) 2583 frags = MAX_SKB_FRAGS; 2584 len = datalen - frags * PAGE_SIZE; 2585 if (len > 0) { 2586 memset(skb_put(skb, len), 0, len); 2587 datalen = frags * PAGE_SIZE; 2588 } 2589 2590 i = 0; 2591 frag_len = (datalen/frags) < PAGE_SIZE ? 2592 (datalen/frags) : PAGE_SIZE; 2593 while (datalen > 0) { 2594 if (unlikely(!pkt_dev->page)) { 2595 int node = numa_node_id(); 2596 2597 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE)) 2598 node = pkt_dev->node; 2599 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0); 2600 if (!pkt_dev->page) 2601 break; 2602 } 2603 skb_shinfo(skb)->frags[i].page = pkt_dev->page; 2604 get_page(pkt_dev->page); 2605 skb_shinfo(skb)->frags[i].page_offset = 0; 2606 /*last fragment, fill rest of data*/ 2607 if (i == (frags - 1)) 2608 skb_shinfo(skb)->frags[i].size = 2609 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 2610 else 2611 skb_shinfo(skb)->frags[i].size = frag_len; 2612 datalen -= skb_shinfo(skb)->frags[i].size; 2613 skb->len += skb_shinfo(skb)->frags[i].size; 2614 skb->data_len += skb_shinfo(skb)->frags[i].size; 2615 i++; 2616 skb_shinfo(skb)->nr_frags = i; 2617 } 2618 } 2619 2620 /* Stamp the time, and sequence number, 2621 * convert them to network byte order 2622 */ 2623 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2624 pgh->seq_num = htonl(pkt_dev->seq_num); 2625 2626 do_gettimeofday(×tamp); 2627 pgh->tv_sec = htonl(timestamp.tv_sec); 2628 pgh->tv_usec = htonl(timestamp.tv_usec); 2629 } 2630 2631 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2632 struct pktgen_dev *pkt_dev) 2633 { 2634 struct sk_buff *skb = NULL; 2635 __u8 *eth; 2636 struct udphdr *udph; 2637 int datalen, iplen; 2638 struct iphdr *iph; 2639 __be16 protocol = htons(ETH_P_IP); 2640 __be32 *mpls; 2641 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2642 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2643 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2644 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2645 u16 queue_map; 2646 2647 if (pkt_dev->nr_labels) 2648 protocol = htons(ETH_P_MPLS_UC); 2649 2650 if (pkt_dev->vlan_id != 0xffff) 2651 protocol = htons(ETH_P_8021Q); 2652 2653 /* Update any of the values, used when we're incrementing various 2654 * fields. 2655 */ 2656 mod_cur_headers(pkt_dev); 2657 queue_map = pkt_dev->cur_queue_map; 2658 2659 datalen = (odev->hard_header_len + 16) & ~0xf; 2660 2661 if (pkt_dev->flags & F_NODE) { 2662 int node; 2663 2664 if (pkt_dev->node >= 0) 2665 node = pkt_dev->node; 2666 else 2667 node = numa_node_id(); 2668 2669 skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64 2670 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node); 2671 if (likely(skb)) { 2672 skb_reserve(skb, NET_SKB_PAD); 2673 skb->dev = odev; 2674 } 2675 } 2676 else 2677 skb = __netdev_alloc_skb(odev, 2678 pkt_dev->cur_pkt_size + 64 2679 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT); 2680 2681 if (!skb) { 2682 sprintf(pkt_dev->result, "No memory"); 2683 return NULL; 2684 } 2685 prefetchw(skb->data); 2686 2687 skb_reserve(skb, datalen); 2688 2689 /* Reserve for ethernet and IP header */ 2690 eth = (__u8 *) skb_push(skb, 14); 2691 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2692 if (pkt_dev->nr_labels) 2693 mpls_push(mpls, pkt_dev); 2694 2695 if (pkt_dev->vlan_id != 0xffff) { 2696 if (pkt_dev->svlan_id != 0xffff) { 2697 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2698 *svlan_tci = build_tci(pkt_dev->svlan_id, 2699 pkt_dev->svlan_cfi, 2700 pkt_dev->svlan_p); 2701 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2702 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2703 } 2704 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2705 *vlan_tci = build_tci(pkt_dev->vlan_id, 2706 pkt_dev->vlan_cfi, 2707 pkt_dev->vlan_p); 2708 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2709 *vlan_encapsulated_proto = htons(ETH_P_IP); 2710 } 2711 2712 skb->network_header = skb->tail; 2713 skb->transport_header = skb->network_header + sizeof(struct iphdr); 2714 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr)); 2715 skb_set_queue_mapping(skb, queue_map); 2716 skb->priority = pkt_dev->skb_priority; 2717 2718 iph = ip_hdr(skb); 2719 udph = udp_hdr(skb); 2720 2721 memcpy(eth, pkt_dev->hh, 12); 2722 *(__be16 *) & eth[12] = protocol; 2723 2724 /* Eth + IPh + UDPh + mpls */ 2725 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2726 pkt_dev->pkt_overhead; 2727 if (datalen < sizeof(struct pktgen_hdr)) 2728 datalen = sizeof(struct pktgen_hdr); 2729 2730 udph->source = htons(pkt_dev->cur_udp_src); 2731 udph->dest = htons(pkt_dev->cur_udp_dst); 2732 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2733 udph->check = 0; /* No checksum */ 2734 2735 iph->ihl = 5; 2736 iph->version = 4; 2737 iph->ttl = 32; 2738 iph->tos = pkt_dev->tos; 2739 iph->protocol = IPPROTO_UDP; /* UDP */ 2740 iph->saddr = pkt_dev->cur_saddr; 2741 iph->daddr = pkt_dev->cur_daddr; 2742 iph->id = htons(pkt_dev->ip_id); 2743 pkt_dev->ip_id++; 2744 iph->frag_off = 0; 2745 iplen = 20 + 8 + datalen; 2746 iph->tot_len = htons(iplen); 2747 iph->check = 0; 2748 iph->check = ip_fast_csum((void *)iph, iph->ihl); 2749 skb->protocol = protocol; 2750 skb->mac_header = (skb->network_header - ETH_HLEN - 2751 pkt_dev->pkt_overhead); 2752 skb->dev = odev; 2753 skb->pkt_type = PACKET_HOST; 2754 pktgen_finalize_skb(pkt_dev, skb, datalen); 2755 2756 #ifdef CONFIG_XFRM 2757 if (!process_ipsec(pkt_dev, skb, protocol)) 2758 return NULL; 2759 #endif 2760 2761 return skb; 2762 } 2763 2764 /* 2765 * scan_ip6, fmt_ip taken from dietlibc-0.21 2766 * Author Felix von Leitner <felix-dietlibc@fefe.de> 2767 * 2768 * Slightly modified for kernel. 2769 * Should be candidate for net/ipv4/utils.c 2770 * --ro 2771 */ 2772 2773 static unsigned int scan_ip6(const char *s, char ip[16]) 2774 { 2775 unsigned int i; 2776 unsigned int len = 0; 2777 unsigned long u; 2778 char suffix[16]; 2779 unsigned int prefixlen = 0; 2780 unsigned int suffixlen = 0; 2781 __be32 tmp; 2782 char *pos; 2783 2784 for (i = 0; i < 16; i++) 2785 ip[i] = 0; 2786 2787 for (;;) { 2788 if (*s == ':') { 2789 len++; 2790 if (s[1] == ':') { /* Found "::", skip to part 2 */ 2791 s += 2; 2792 len++; 2793 break; 2794 } 2795 s++; 2796 } 2797 2798 u = simple_strtoul(s, &pos, 16); 2799 i = pos - s; 2800 if (!i) 2801 return 0; 2802 if (prefixlen == 12 && s[i] == '.') { 2803 2804 /* the last 4 bytes may be written as IPv4 address */ 2805 2806 tmp = in_aton(s); 2807 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp)); 2808 return i + len; 2809 } 2810 ip[prefixlen++] = (u >> 8); 2811 ip[prefixlen++] = (u & 255); 2812 s += i; 2813 len += i; 2814 if (prefixlen == 16) 2815 return len; 2816 } 2817 2818 /* part 2, after "::" */ 2819 for (;;) { 2820 if (*s == ':') { 2821 if (suffixlen == 0) 2822 break; 2823 s++; 2824 len++; 2825 } else if (suffixlen != 0) 2826 break; 2827 2828 u = simple_strtol(s, &pos, 16); 2829 i = pos - s; 2830 if (!i) { 2831 if (*s) 2832 len--; 2833 break; 2834 } 2835 if (suffixlen + prefixlen <= 12 && s[i] == '.') { 2836 tmp = in_aton(s); 2837 memcpy((struct in_addr *)(suffix + suffixlen), &tmp, 2838 sizeof(tmp)); 2839 suffixlen += 4; 2840 len += strlen(s); 2841 break; 2842 } 2843 suffix[suffixlen++] = (u >> 8); 2844 suffix[suffixlen++] = (u & 255); 2845 s += i; 2846 len += i; 2847 if (prefixlen + suffixlen == 16) 2848 break; 2849 } 2850 for (i = 0; i < suffixlen; i++) 2851 ip[16 - suffixlen + i] = suffix[i]; 2852 return len; 2853 } 2854 2855 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2856 struct pktgen_dev *pkt_dev) 2857 { 2858 struct sk_buff *skb = NULL; 2859 __u8 *eth; 2860 struct udphdr *udph; 2861 int datalen; 2862 struct ipv6hdr *iph; 2863 __be16 protocol = htons(ETH_P_IPV6); 2864 __be32 *mpls; 2865 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2866 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2867 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2868 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2869 u16 queue_map; 2870 2871 if (pkt_dev->nr_labels) 2872 protocol = htons(ETH_P_MPLS_UC); 2873 2874 if (pkt_dev->vlan_id != 0xffff) 2875 protocol = htons(ETH_P_8021Q); 2876 2877 /* Update any of the values, used when we're incrementing various 2878 * fields. 2879 */ 2880 mod_cur_headers(pkt_dev); 2881 queue_map = pkt_dev->cur_queue_map; 2882 2883 skb = __netdev_alloc_skb(odev, 2884 pkt_dev->cur_pkt_size + 64 2885 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT); 2886 if (!skb) { 2887 sprintf(pkt_dev->result, "No memory"); 2888 return NULL; 2889 } 2890 prefetchw(skb->data); 2891 2892 skb_reserve(skb, 16); 2893 2894 /* Reserve for ethernet and IP header */ 2895 eth = (__u8 *) skb_push(skb, 14); 2896 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2897 if (pkt_dev->nr_labels) 2898 mpls_push(mpls, pkt_dev); 2899 2900 if (pkt_dev->vlan_id != 0xffff) { 2901 if (pkt_dev->svlan_id != 0xffff) { 2902 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2903 *svlan_tci = build_tci(pkt_dev->svlan_id, 2904 pkt_dev->svlan_cfi, 2905 pkt_dev->svlan_p); 2906 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2907 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2908 } 2909 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2910 *vlan_tci = build_tci(pkt_dev->vlan_id, 2911 pkt_dev->vlan_cfi, 2912 pkt_dev->vlan_p); 2913 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2914 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 2915 } 2916 2917 skb->network_header = skb->tail; 2918 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr); 2919 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr)); 2920 skb_set_queue_mapping(skb, queue_map); 2921 skb->priority = pkt_dev->skb_priority; 2922 iph = ipv6_hdr(skb); 2923 udph = udp_hdr(skb); 2924 2925 memcpy(eth, pkt_dev->hh, 12); 2926 *(__be16 *) ð[12] = protocol; 2927 2928 /* Eth + IPh + UDPh + mpls */ 2929 datalen = pkt_dev->cur_pkt_size - 14 - 2930 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 2931 pkt_dev->pkt_overhead; 2932 2933 if (datalen < sizeof(struct pktgen_hdr)) { 2934 datalen = sizeof(struct pktgen_hdr); 2935 if (net_ratelimit()) 2936 pr_info("increased datalen to %d\n", datalen); 2937 } 2938 2939 udph->source = htons(pkt_dev->cur_udp_src); 2940 udph->dest = htons(pkt_dev->cur_udp_dst); 2941 udph->len = htons(datalen + sizeof(struct udphdr)); 2942 udph->check = 0; /* No checksum */ 2943 2944 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 2945 2946 if (pkt_dev->traffic_class) { 2947 /* Version + traffic class + flow (0) */ 2948 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 2949 } 2950 2951 iph->hop_limit = 32; 2952 2953 iph->payload_len = htons(sizeof(struct udphdr) + datalen); 2954 iph->nexthdr = IPPROTO_UDP; 2955 2956 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr); 2957 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr); 2958 2959 skb->mac_header = (skb->network_header - ETH_HLEN - 2960 pkt_dev->pkt_overhead); 2961 skb->protocol = protocol; 2962 skb->dev = odev; 2963 skb->pkt_type = PACKET_HOST; 2964 2965 pktgen_finalize_skb(pkt_dev, skb, datalen); 2966 2967 return skb; 2968 } 2969 2970 static struct sk_buff *fill_packet(struct net_device *odev, 2971 struct pktgen_dev *pkt_dev) 2972 { 2973 if (pkt_dev->flags & F_IPV6) 2974 return fill_packet_ipv6(odev, pkt_dev); 2975 else 2976 return fill_packet_ipv4(odev, pkt_dev); 2977 } 2978 2979 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 2980 { 2981 pkt_dev->seq_num = 1; 2982 pkt_dev->idle_acc = 0; 2983 pkt_dev->sofar = 0; 2984 pkt_dev->tx_bytes = 0; 2985 pkt_dev->errors = 0; 2986 } 2987 2988 /* Set up structure for sending pkts, clear counters */ 2989 2990 static void pktgen_run(struct pktgen_thread *t) 2991 { 2992 struct pktgen_dev *pkt_dev; 2993 int started = 0; 2994 2995 func_enter(); 2996 2997 if_lock(t); 2998 list_for_each_entry(pkt_dev, &t->if_list, list) { 2999 3000 /* 3001 * setup odev and create initial packet. 3002 */ 3003 pktgen_setup_inject(pkt_dev); 3004 3005 if (pkt_dev->odev) { 3006 pktgen_clear_counters(pkt_dev); 3007 pkt_dev->running = 1; /* Cranke yeself! */ 3008 pkt_dev->skb = NULL; 3009 pkt_dev->started_at = 3010 pkt_dev->next_tx = ktime_now(); 3011 3012 set_pkt_overhead(pkt_dev); 3013 3014 strcpy(pkt_dev->result, "Starting"); 3015 started++; 3016 } else 3017 strcpy(pkt_dev->result, "Error starting"); 3018 } 3019 if_unlock(t); 3020 if (started) 3021 t->control &= ~(T_STOP); 3022 } 3023 3024 static void pktgen_stop_all_threads_ifs(void) 3025 { 3026 struct pktgen_thread *t; 3027 3028 func_enter(); 3029 3030 mutex_lock(&pktgen_thread_lock); 3031 3032 list_for_each_entry(t, &pktgen_threads, th_list) 3033 t->control |= T_STOP; 3034 3035 mutex_unlock(&pktgen_thread_lock); 3036 } 3037 3038 static int thread_is_running(const struct pktgen_thread *t) 3039 { 3040 const struct pktgen_dev *pkt_dev; 3041 3042 list_for_each_entry(pkt_dev, &t->if_list, list) 3043 if (pkt_dev->running) 3044 return 1; 3045 return 0; 3046 } 3047 3048 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3049 { 3050 if_lock(t); 3051 3052 while (thread_is_running(t)) { 3053 3054 if_unlock(t); 3055 3056 msleep_interruptible(100); 3057 3058 if (signal_pending(current)) 3059 goto signal; 3060 if_lock(t); 3061 } 3062 if_unlock(t); 3063 return 1; 3064 signal: 3065 return 0; 3066 } 3067 3068 static int pktgen_wait_all_threads_run(void) 3069 { 3070 struct pktgen_thread *t; 3071 int sig = 1; 3072 3073 mutex_lock(&pktgen_thread_lock); 3074 3075 list_for_each_entry(t, &pktgen_threads, th_list) { 3076 sig = pktgen_wait_thread_run(t); 3077 if (sig == 0) 3078 break; 3079 } 3080 3081 if (sig == 0) 3082 list_for_each_entry(t, &pktgen_threads, th_list) 3083 t->control |= (T_STOP); 3084 3085 mutex_unlock(&pktgen_thread_lock); 3086 return sig; 3087 } 3088 3089 static void pktgen_run_all_threads(void) 3090 { 3091 struct pktgen_thread *t; 3092 3093 func_enter(); 3094 3095 mutex_lock(&pktgen_thread_lock); 3096 3097 list_for_each_entry(t, &pktgen_threads, th_list) 3098 t->control |= (T_RUN); 3099 3100 mutex_unlock(&pktgen_thread_lock); 3101 3102 /* Propagate thread->control */ 3103 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3104 3105 pktgen_wait_all_threads_run(); 3106 } 3107 3108 static void pktgen_reset_all_threads(void) 3109 { 3110 struct pktgen_thread *t; 3111 3112 func_enter(); 3113 3114 mutex_lock(&pktgen_thread_lock); 3115 3116 list_for_each_entry(t, &pktgen_threads, th_list) 3117 t->control |= (T_REMDEVALL); 3118 3119 mutex_unlock(&pktgen_thread_lock); 3120 3121 /* Propagate thread->control */ 3122 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3123 3124 pktgen_wait_all_threads_run(); 3125 } 3126 3127 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3128 { 3129 __u64 bps, mbps, pps; 3130 char *p = pkt_dev->result; 3131 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3132 pkt_dev->started_at); 3133 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3134 3135 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", 3136 (unsigned long long)ktime_to_us(elapsed), 3137 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3138 (unsigned long long)ktime_to_us(idle), 3139 (unsigned long long)pkt_dev->sofar, 3140 pkt_dev->cur_pkt_size, nr_frags); 3141 3142 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3143 ktime_to_ns(elapsed)); 3144 3145 bps = pps * 8 * pkt_dev->cur_pkt_size; 3146 3147 mbps = bps; 3148 do_div(mbps, 1000000); 3149 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3150 (unsigned long long)pps, 3151 (unsigned long long)mbps, 3152 (unsigned long long)bps, 3153 (unsigned long long)pkt_dev->errors); 3154 } 3155 3156 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3157 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3158 { 3159 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3160 3161 if (!pkt_dev->running) { 3162 pr_warning("interface: %s is already stopped\n", 3163 pkt_dev->odevname); 3164 return -EINVAL; 3165 } 3166 3167 kfree_skb(pkt_dev->skb); 3168 pkt_dev->skb = NULL; 3169 pkt_dev->stopped_at = ktime_now(); 3170 pkt_dev->running = 0; 3171 3172 show_results(pkt_dev, nr_frags); 3173 3174 return 0; 3175 } 3176 3177 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3178 { 3179 struct pktgen_dev *pkt_dev, *best = NULL; 3180 3181 if_lock(t); 3182 3183 list_for_each_entry(pkt_dev, &t->if_list, list) { 3184 if (!pkt_dev->running) 3185 continue; 3186 if (best == NULL) 3187 best = pkt_dev; 3188 else if (ktime_lt(pkt_dev->next_tx, best->next_tx)) 3189 best = pkt_dev; 3190 } 3191 if_unlock(t); 3192 return best; 3193 } 3194 3195 static void pktgen_stop(struct pktgen_thread *t) 3196 { 3197 struct pktgen_dev *pkt_dev; 3198 3199 func_enter(); 3200 3201 if_lock(t); 3202 3203 list_for_each_entry(pkt_dev, &t->if_list, list) { 3204 pktgen_stop_device(pkt_dev); 3205 } 3206 3207 if_unlock(t); 3208 } 3209 3210 /* 3211 * one of our devices needs to be removed - find it 3212 * and remove it 3213 */ 3214 static void pktgen_rem_one_if(struct pktgen_thread *t) 3215 { 3216 struct list_head *q, *n; 3217 struct pktgen_dev *cur; 3218 3219 func_enter(); 3220 3221 if_lock(t); 3222 3223 list_for_each_safe(q, n, &t->if_list) { 3224 cur = list_entry(q, struct pktgen_dev, list); 3225 3226 if (!cur->removal_mark) 3227 continue; 3228 3229 kfree_skb(cur->skb); 3230 cur->skb = NULL; 3231 3232 pktgen_remove_device(t, cur); 3233 3234 break; 3235 } 3236 3237 if_unlock(t); 3238 } 3239 3240 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3241 { 3242 struct list_head *q, *n; 3243 struct pktgen_dev *cur; 3244 3245 func_enter(); 3246 3247 /* Remove all devices, free mem */ 3248 3249 if_lock(t); 3250 3251 list_for_each_safe(q, n, &t->if_list) { 3252 cur = list_entry(q, struct pktgen_dev, list); 3253 3254 kfree_skb(cur->skb); 3255 cur->skb = NULL; 3256 3257 pktgen_remove_device(t, cur); 3258 } 3259 3260 if_unlock(t); 3261 } 3262 3263 static void pktgen_rem_thread(struct pktgen_thread *t) 3264 { 3265 /* Remove from the thread list */ 3266 3267 remove_proc_entry(t->tsk->comm, pg_proc_dir); 3268 3269 } 3270 3271 static void pktgen_resched(struct pktgen_dev *pkt_dev) 3272 { 3273 ktime_t idle_start = ktime_now(); 3274 schedule(); 3275 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3276 } 3277 3278 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) 3279 { 3280 ktime_t idle_start = ktime_now(); 3281 3282 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3283 if (signal_pending(current)) 3284 break; 3285 3286 if (need_resched()) 3287 pktgen_resched(pkt_dev); 3288 else 3289 cpu_relax(); 3290 } 3291 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3292 } 3293 3294 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3295 { 3296 struct net_device *odev = pkt_dev->odev; 3297 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *) 3298 = odev->netdev_ops->ndo_start_xmit; 3299 struct netdev_queue *txq; 3300 u16 queue_map; 3301 int ret; 3302 3303 /* If device is offline, then don't send */ 3304 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { 3305 pktgen_stop_device(pkt_dev); 3306 return; 3307 } 3308 3309 /* This is max DELAY, this has special meaning of 3310 * "never transmit" 3311 */ 3312 if (unlikely(pkt_dev->delay == ULLONG_MAX)) { 3313 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX); 3314 return; 3315 } 3316 3317 /* If no skb or clone count exhausted then get new one */ 3318 if (!pkt_dev->skb || (pkt_dev->last_ok && 3319 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { 3320 /* build a new pkt */ 3321 kfree_skb(pkt_dev->skb); 3322 3323 pkt_dev->skb = fill_packet(odev, pkt_dev); 3324 if (pkt_dev->skb == NULL) { 3325 pr_err("ERROR: couldn't allocate skb in fill_packet\n"); 3326 schedule(); 3327 pkt_dev->clone_count--; /* back out increment, OOM */ 3328 return; 3329 } 3330 pkt_dev->last_pkt_size = pkt_dev->skb->len; 3331 pkt_dev->allocated_skbs++; 3332 pkt_dev->clone_count = 0; /* reset counter */ 3333 } 3334 3335 if (pkt_dev->delay && pkt_dev->last_ok) 3336 spin(pkt_dev, pkt_dev->next_tx); 3337 3338 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3339 txq = netdev_get_tx_queue(odev, queue_map); 3340 3341 __netif_tx_lock_bh(txq); 3342 3343 if (unlikely(netif_tx_queue_frozen_or_stopped(txq))) { 3344 ret = NETDEV_TX_BUSY; 3345 pkt_dev->last_ok = 0; 3346 goto unlock; 3347 } 3348 atomic_inc(&(pkt_dev->skb->users)); 3349 ret = (*xmit)(pkt_dev->skb, odev); 3350 3351 switch (ret) { 3352 case NETDEV_TX_OK: 3353 txq_trans_update(txq); 3354 pkt_dev->last_ok = 1; 3355 pkt_dev->sofar++; 3356 pkt_dev->seq_num++; 3357 pkt_dev->tx_bytes += pkt_dev->last_pkt_size; 3358 break; 3359 case NET_XMIT_DROP: 3360 case NET_XMIT_CN: 3361 case NET_XMIT_POLICED: 3362 /* skb has been consumed */ 3363 pkt_dev->errors++; 3364 break; 3365 default: /* Drivers are not supposed to return other values! */ 3366 if (net_ratelimit()) 3367 pr_info("%s xmit error: %d\n", pkt_dev->odevname, ret); 3368 pkt_dev->errors++; 3369 /* fallthru */ 3370 case NETDEV_TX_LOCKED: 3371 case NETDEV_TX_BUSY: 3372 /* Retry it next time */ 3373 atomic_dec(&(pkt_dev->skb->users)); 3374 pkt_dev->last_ok = 0; 3375 } 3376 unlock: 3377 __netif_tx_unlock_bh(txq); 3378 3379 /* If pkt_dev->count is zero, then run forever */ 3380 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3381 pktgen_wait_for_skb(pkt_dev); 3382 3383 /* Done with this */ 3384 pktgen_stop_device(pkt_dev); 3385 } 3386 } 3387 3388 /* 3389 * Main loop of the thread goes here 3390 */ 3391 3392 static int pktgen_thread_worker(void *arg) 3393 { 3394 DEFINE_WAIT(wait); 3395 struct pktgen_thread *t = arg; 3396 struct pktgen_dev *pkt_dev = NULL; 3397 int cpu = t->cpu; 3398 3399 BUG_ON(smp_processor_id() != cpu); 3400 3401 init_waitqueue_head(&t->queue); 3402 complete(&t->start_done); 3403 3404 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); 3405 3406 set_current_state(TASK_INTERRUPTIBLE); 3407 3408 set_freezable(); 3409 3410 while (!kthread_should_stop()) { 3411 pkt_dev = next_to_run(t); 3412 3413 if (unlikely(!pkt_dev && t->control == 0)) { 3414 if (pktgen_exiting) 3415 break; 3416 wait_event_interruptible_timeout(t->queue, 3417 t->control != 0, 3418 HZ/10); 3419 try_to_freeze(); 3420 continue; 3421 } 3422 3423 __set_current_state(TASK_RUNNING); 3424 3425 if (likely(pkt_dev)) { 3426 pktgen_xmit(pkt_dev); 3427 3428 if (need_resched()) 3429 pktgen_resched(pkt_dev); 3430 else 3431 cpu_relax(); 3432 } 3433 3434 if (t->control & T_STOP) { 3435 pktgen_stop(t); 3436 t->control &= ~(T_STOP); 3437 } 3438 3439 if (t->control & T_RUN) { 3440 pktgen_run(t); 3441 t->control &= ~(T_RUN); 3442 } 3443 3444 if (t->control & T_REMDEVALL) { 3445 pktgen_rem_all_ifs(t); 3446 t->control &= ~(T_REMDEVALL); 3447 } 3448 3449 if (t->control & T_REMDEV) { 3450 pktgen_rem_one_if(t); 3451 t->control &= ~(T_REMDEV); 3452 } 3453 3454 try_to_freeze(); 3455 3456 set_current_state(TASK_INTERRUPTIBLE); 3457 } 3458 3459 pr_debug("%s stopping all device\n", t->tsk->comm); 3460 pktgen_stop(t); 3461 3462 pr_debug("%s removing all device\n", t->tsk->comm); 3463 pktgen_rem_all_ifs(t); 3464 3465 pr_debug("%s removing thread\n", t->tsk->comm); 3466 pktgen_rem_thread(t); 3467 3468 /* Wait for kthread_stop */ 3469 while (!kthread_should_stop()) { 3470 set_current_state(TASK_INTERRUPTIBLE); 3471 schedule(); 3472 } 3473 __set_current_state(TASK_RUNNING); 3474 3475 return 0; 3476 } 3477 3478 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3479 const char *ifname, bool exact) 3480 { 3481 struct pktgen_dev *p, *pkt_dev = NULL; 3482 size_t len = strlen(ifname); 3483 3484 if_lock(t); 3485 list_for_each_entry(p, &t->if_list, list) 3486 if (strncmp(p->odevname, ifname, len) == 0) { 3487 if (p->odevname[len]) { 3488 if (exact || p->odevname[len] != '@') 3489 continue; 3490 } 3491 pkt_dev = p; 3492 break; 3493 } 3494 3495 if_unlock(t); 3496 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev); 3497 return pkt_dev; 3498 } 3499 3500 /* 3501 * Adds a dev at front of if_list. 3502 */ 3503 3504 static int add_dev_to_thread(struct pktgen_thread *t, 3505 struct pktgen_dev *pkt_dev) 3506 { 3507 int rv = 0; 3508 3509 if_lock(t); 3510 3511 if (pkt_dev->pg_thread) { 3512 pr_err("ERROR: already assigned to a thread\n"); 3513 rv = -EBUSY; 3514 goto out; 3515 } 3516 3517 list_add(&pkt_dev->list, &t->if_list); 3518 pkt_dev->pg_thread = t; 3519 pkt_dev->running = 0; 3520 3521 out: 3522 if_unlock(t); 3523 return rv; 3524 } 3525 3526 /* Called under thread lock */ 3527 3528 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3529 { 3530 struct pktgen_dev *pkt_dev; 3531 int err; 3532 int node = cpu_to_node(t->cpu); 3533 3534 /* We don't allow a device to be on several threads */ 3535 3536 pkt_dev = __pktgen_NN_threads(ifname, FIND); 3537 if (pkt_dev) { 3538 pr_err("ERROR: interface already used\n"); 3539 return -EBUSY; 3540 } 3541 3542 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); 3543 if (!pkt_dev) 3544 return -ENOMEM; 3545 3546 strcpy(pkt_dev->odevname, ifname); 3547 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state), 3548 node); 3549 if (pkt_dev->flows == NULL) { 3550 kfree(pkt_dev); 3551 return -ENOMEM; 3552 } 3553 3554 pkt_dev->removal_mark = 0; 3555 pkt_dev->min_pkt_size = ETH_ZLEN; 3556 pkt_dev->max_pkt_size = ETH_ZLEN; 3557 pkt_dev->nfrags = 0; 3558 pkt_dev->clone_skb = pg_clone_skb_d; 3559 pkt_dev->delay = pg_delay_d; 3560 pkt_dev->count = pg_count_d; 3561 pkt_dev->sofar = 0; 3562 pkt_dev->udp_src_min = 9; /* sink port */ 3563 pkt_dev->udp_src_max = 9; 3564 pkt_dev->udp_dst_min = 9; 3565 pkt_dev->udp_dst_max = 9; 3566 3567 pkt_dev->vlan_p = 0; 3568 pkt_dev->vlan_cfi = 0; 3569 pkt_dev->vlan_id = 0xffff; 3570 pkt_dev->svlan_p = 0; 3571 pkt_dev->svlan_cfi = 0; 3572 pkt_dev->svlan_id = 0xffff; 3573 pkt_dev->node = -1; 3574 3575 err = pktgen_setup_dev(pkt_dev, ifname); 3576 if (err) 3577 goto out1; 3578 3579 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir, 3580 &pktgen_if_fops, pkt_dev); 3581 if (!pkt_dev->entry) { 3582 pr_err("cannot create %s/%s procfs entry\n", 3583 PG_PROC_DIR, ifname); 3584 err = -EINVAL; 3585 goto out2; 3586 } 3587 #ifdef CONFIG_XFRM 3588 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3589 pkt_dev->ipsproto = IPPROTO_ESP; 3590 #endif 3591 3592 return add_dev_to_thread(t, pkt_dev); 3593 out2: 3594 dev_put(pkt_dev->odev); 3595 out1: 3596 #ifdef CONFIG_XFRM 3597 free_SAs(pkt_dev); 3598 #endif 3599 vfree(pkt_dev->flows); 3600 kfree(pkt_dev); 3601 return err; 3602 } 3603 3604 static int __init pktgen_create_thread(int cpu) 3605 { 3606 struct pktgen_thread *t; 3607 struct proc_dir_entry *pe; 3608 struct task_struct *p; 3609 3610 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL, 3611 cpu_to_node(cpu)); 3612 if (!t) { 3613 pr_err("ERROR: out of memory, can't create new thread\n"); 3614 return -ENOMEM; 3615 } 3616 3617 spin_lock_init(&t->if_lock); 3618 t->cpu = cpu; 3619 3620 INIT_LIST_HEAD(&t->if_list); 3621 3622 list_add_tail(&t->th_list, &pktgen_threads); 3623 init_completion(&t->start_done); 3624 3625 p = kthread_create_on_node(pktgen_thread_worker, 3626 t, 3627 cpu_to_node(cpu), 3628 "kpktgend_%d", cpu); 3629 if (IS_ERR(p)) { 3630 pr_err("kernel_thread() failed for cpu %d\n", t->cpu); 3631 list_del(&t->th_list); 3632 kfree(t); 3633 return PTR_ERR(p); 3634 } 3635 kthread_bind(p, cpu); 3636 t->tsk = p; 3637 3638 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir, 3639 &pktgen_thread_fops, t); 3640 if (!pe) { 3641 pr_err("cannot create %s/%s procfs entry\n", 3642 PG_PROC_DIR, t->tsk->comm); 3643 kthread_stop(p); 3644 list_del(&t->th_list); 3645 kfree(t); 3646 return -EINVAL; 3647 } 3648 3649 wake_up_process(p); 3650 wait_for_completion(&t->start_done); 3651 3652 return 0; 3653 } 3654 3655 /* 3656 * Removes a device from the thread if_list. 3657 */ 3658 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3659 struct pktgen_dev *pkt_dev) 3660 { 3661 struct list_head *q, *n; 3662 struct pktgen_dev *p; 3663 3664 list_for_each_safe(q, n, &t->if_list) { 3665 p = list_entry(q, struct pktgen_dev, list); 3666 if (p == pkt_dev) 3667 list_del(&p->list); 3668 } 3669 } 3670 3671 static int pktgen_remove_device(struct pktgen_thread *t, 3672 struct pktgen_dev *pkt_dev) 3673 { 3674 3675 pr_debug("remove_device pkt_dev=%p\n", pkt_dev); 3676 3677 if (pkt_dev->running) { 3678 pr_warning("WARNING: trying to remove a running interface, stopping it now\n"); 3679 pktgen_stop_device(pkt_dev); 3680 } 3681 3682 /* Dis-associate from the interface */ 3683 3684 if (pkt_dev->odev) { 3685 dev_put(pkt_dev->odev); 3686 pkt_dev->odev = NULL; 3687 } 3688 3689 /* And update the thread if_list */ 3690 3691 _rem_dev_from_if_list(t, pkt_dev); 3692 3693 if (pkt_dev->entry) 3694 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 3695 3696 #ifdef CONFIG_XFRM 3697 free_SAs(pkt_dev); 3698 #endif 3699 vfree(pkt_dev->flows); 3700 if (pkt_dev->page) 3701 put_page(pkt_dev->page); 3702 kfree(pkt_dev); 3703 return 0; 3704 } 3705 3706 static int __init pg_init(void) 3707 { 3708 int cpu; 3709 struct proc_dir_entry *pe; 3710 int ret = 0; 3711 3712 pr_info("%s", version); 3713 3714 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net); 3715 if (!pg_proc_dir) 3716 return -ENODEV; 3717 3718 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops); 3719 if (pe == NULL) { 3720 pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL); 3721 ret = -EINVAL; 3722 goto remove_dir; 3723 } 3724 3725 register_netdevice_notifier(&pktgen_notifier_block); 3726 3727 for_each_online_cpu(cpu) { 3728 int err; 3729 3730 err = pktgen_create_thread(cpu); 3731 if (err) 3732 pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n", 3733 cpu, err); 3734 } 3735 3736 if (list_empty(&pktgen_threads)) { 3737 pr_err("ERROR: Initialization failed for all threads\n"); 3738 ret = -ENODEV; 3739 goto unregister; 3740 } 3741 3742 return 0; 3743 3744 unregister: 3745 unregister_netdevice_notifier(&pktgen_notifier_block); 3746 remove_proc_entry(PGCTRL, pg_proc_dir); 3747 remove_dir: 3748 proc_net_remove(&init_net, PG_PROC_DIR); 3749 return ret; 3750 } 3751 3752 static void __exit pg_cleanup(void) 3753 { 3754 struct pktgen_thread *t; 3755 struct list_head *q, *n; 3756 3757 /* Stop all interfaces & threads */ 3758 pktgen_exiting = true; 3759 3760 list_for_each_safe(q, n, &pktgen_threads) { 3761 t = list_entry(q, struct pktgen_thread, th_list); 3762 kthread_stop(t->tsk); 3763 kfree(t); 3764 } 3765 3766 /* Un-register us from receiving netdevice events */ 3767 unregister_netdevice_notifier(&pktgen_notifier_block); 3768 3769 /* Clean up proc file system */ 3770 remove_proc_entry(PGCTRL, pg_proc_dir); 3771 proc_net_remove(&init_net, PG_PROC_DIR); 3772 } 3773 3774 module_init(pg_init); 3775 module_exit(pg_cleanup); 3776 3777 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); 3778 MODULE_DESCRIPTION("Packet Generator tool"); 3779 MODULE_LICENSE("GPL"); 3780 MODULE_VERSION(VERSION); 3781 module_param(pg_count_d, int, 0); 3782 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); 3783 module_param(pg_delay_d, int, 0); 3784 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); 3785 module_param(pg_clone_skb_d, int, 0); 3786 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); 3787 module_param(debug, int, 0); 3788 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); 3789