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