1 /* 2 * Authors: 3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se> 4 * Uppsala University and 5 * Swedish University of Agricultural Sciences 6 * 7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> 8 * Ben Greear <greearb@candelatech.com> 9 * Jens Låås <jens.laas@data.slu.se> 10 * 11 * This program is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License 13 * as published by the Free Software Foundation; either version 14 * 2 of the License, or (at your option) any later version. 15 * 16 * 17 * A tool for loading the network with preconfigurated packets. 18 * The tool is implemented as a linux module. Parameters are output 19 * device, delay (to hard_xmit), number of packets, and whether 20 * to use multiple SKBs or just the same one. 21 * pktgen uses the installed interface's output routine. 22 * 23 * Additional hacking by: 24 * 25 * Jens.Laas@data.slu.se 26 * Improved by ANK. 010120. 27 * Improved by ANK even more. 010212. 28 * MAC address typo fixed. 010417 --ro 29 * Integrated. 020301 --DaveM 30 * Added multiskb option 020301 --DaveM 31 * Scaling of results. 020417--sigurdur@linpro.no 32 * Significant re-work of the module: 33 * * Convert to threaded model to more efficiently be able to transmit 34 * and receive on multiple interfaces at once. 35 * * Converted many counters to __u64 to allow longer runs. 36 * * Allow configuration of ranges, like min/max IP address, MACs, 37 * and UDP-ports, for both source and destination, and can 38 * set to use a random distribution or sequentially walk the range. 39 * * Can now change most values after starting. 40 * * Place 12-byte packet in UDP payload with magic number, 41 * sequence number, and timestamp. 42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and 43 * latencies (with micro-second) precision. 44 * * Add IOCTL interface to easily get counters & configuration. 45 * --Ben Greear <greearb@candelatech.com> 46 * 47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct 48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0 49 * as a "fastpath" with a configurable number of clones after alloc's. 50 * clone_skb=0 means all packets are allocated this also means ranges time 51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100 52 * clones. 53 * 54 * Also moved to /proc/net/pktgen/ 55 * --ro 56 * 57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever 58 * mistakes. Also merged in DaveM's patch in the -pre6 patch. 59 * --Ben Greear <greearb@candelatech.com> 60 * 61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br) 62 * 63 * 64 * 021124 Finished major redesign and rewrite for new functionality. 65 * See Documentation/networking/pktgen.txt for how to use this. 66 * 67 * The new operation: 68 * For each CPU one thread/process is created at start. This process checks 69 * for running devices in the if_list and sends packets until count is 0 it 70 * also the thread checks the thread->control which is used for inter-process 71 * communication. controlling process "posts" operations to the threads this 72 * way. The if_lock should be possible to remove when add/rem_device is merged 73 * into this too. 74 * 75 * By design there should only be *one* "controlling" process. In practice 76 * multiple write accesses gives unpredictable result. Understood by "write" 77 * to /proc gives result code thats should be read be the "writer". 78 * For practical use this should be no problem. 79 * 80 * Note when adding devices to a specific CPU there good idea to also assign 81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU. 82 * --ro 83 * 84 * Fix refcount off by one if first packet fails, potential null deref, 85 * memleak 030710- KJP 86 * 87 * First "ranges" functionality for ipv6 030726 --ro 88 * 89 * Included flow support. 030802 ANK. 90 * 91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org> 92 * 93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419 94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604 95 * 96 * New xmit() return, do_div and misc clean up by Stephen Hemminger 97 * <shemminger@osdl.org> 040923 98 * 99 * Randy Dunlap fixed u64 printk compiler waring 100 * 101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org> 102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213 103 * 104 * Corrections from Nikolai Malykh (nmalykh@bilim.com) 105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230 106 * 107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com> 108 * 050103 109 * 110 * MPLS support by Steven Whitehouse <steve@chygwyn.com> 111 * 112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com> 113 * 114 * Fixed src_mac command to set source mac of packet to value specified in 115 * command by Adit Ranadive <adit.262@gmail.com> 116 * 117 */ 118 119 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 120 121 #include <linux/sys.h> 122 #include <linux/types.h> 123 #include <linux/module.h> 124 #include <linux/moduleparam.h> 125 #include <linux/kernel.h> 126 #include <linux/mutex.h> 127 #include <linux/sched.h> 128 #include <linux/slab.h> 129 #include <linux/vmalloc.h> 130 #include <linux/unistd.h> 131 #include <linux/string.h> 132 #include <linux/ptrace.h> 133 #include <linux/errno.h> 134 #include <linux/ioport.h> 135 #include <linux/interrupt.h> 136 #include <linux/capability.h> 137 #include <linux/hrtimer.h> 138 #include <linux/freezer.h> 139 #include <linux/delay.h> 140 #include <linux/timer.h> 141 #include <linux/list.h> 142 #include <linux/init.h> 143 #include <linux/skbuff.h> 144 #include <linux/netdevice.h> 145 #include <linux/inet.h> 146 #include <linux/inetdevice.h> 147 #include <linux/rtnetlink.h> 148 #include <linux/if_arp.h> 149 #include <linux/if_vlan.h> 150 #include <linux/in.h> 151 #include <linux/ip.h> 152 #include <linux/ipv6.h> 153 #include <linux/udp.h> 154 #include <linux/proc_fs.h> 155 #include <linux/seq_file.h> 156 #include <linux/wait.h> 157 #include <linux/etherdevice.h> 158 #include <linux/kthread.h> 159 #include <net/net_namespace.h> 160 #include <net/checksum.h> 161 #include <net/ipv6.h> 162 #include <net/addrconf.h> 163 #ifdef CONFIG_XFRM 164 #include <net/xfrm.h> 165 #endif 166 #include <asm/byteorder.h> 167 #include <linux/rcupdate.h> 168 #include <linux/bitops.h> 169 #include <linux/io.h> 170 #include <linux/timex.h> 171 #include <linux/uaccess.h> 172 #include <asm/dma.h> 173 #include <asm/div64.h> /* do_div */ 174 175 #define VERSION "2.74" 176 #define IP_NAME_SZ 32 177 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */ 178 #define MPLS_STACK_BOTTOM htonl(0x00000100) 179 180 #define func_enter() pr_debug("entering %s\n", __func__); 181 182 /* Device flag bits */ 183 #define F_IPSRC_RND (1<<0) /* IP-Src Random */ 184 #define F_IPDST_RND (1<<1) /* IP-Dst Random */ 185 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */ 186 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */ 187 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */ 188 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */ 189 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */ 190 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */ 191 #define F_MPLS_RND (1<<8) /* Random MPLS labels */ 192 #define F_VID_RND (1<<9) /* Random VLAN ID */ 193 #define F_SVID_RND (1<<10) /* Random SVLAN ID */ 194 #define F_FLOW_SEQ (1<<11) /* Sequential flows */ 195 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */ 196 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */ 197 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */ 198 #define F_NODE (1<<15) /* Node memory alloc*/ 199 200 /* Thread control flag bits */ 201 #define T_STOP (1<<0) /* Stop run */ 202 #define T_RUN (1<<1) /* Start run */ 203 #define T_REMDEVALL (1<<2) /* Remove all devs */ 204 #define T_REMDEV (1<<3) /* Remove one dev */ 205 206 /* If lock -- can be removed after some work */ 207 #define if_lock(t) spin_lock(&(t->if_lock)); 208 #define if_unlock(t) spin_unlock(&(t->if_lock)); 209 210 /* Used to help with determining the pkts on receive */ 211 #define PKTGEN_MAGIC 0xbe9be955 212 #define PG_PROC_DIR "pktgen" 213 #define PGCTRL "pgctrl" 214 static struct proc_dir_entry *pg_proc_dir; 215 216 #define MAX_CFLOWS 65536 217 218 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4) 219 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4) 220 221 struct flow_state { 222 __be32 cur_daddr; 223 int count; 224 #ifdef CONFIG_XFRM 225 struct xfrm_state *x; 226 #endif 227 __u32 flags; 228 }; 229 230 /* flow flag bits */ 231 #define F_INIT (1<<0) /* flow has been initialized */ 232 233 struct pktgen_dev { 234 /* 235 * Try to keep frequent/infrequent used vars. separated. 236 */ 237 struct proc_dir_entry *entry; /* proc file */ 238 struct pktgen_thread *pg_thread;/* the owner */ 239 struct list_head list; /* chaining in the thread's run-queue */ 240 241 int running; /* if false, the test will stop */ 242 243 /* If min != max, then we will either do a linear iteration, or 244 * we will do a random selection from within the range. 245 */ 246 __u32 flags; 247 int removal_mark; /* non-zero => the device is marked for 248 * removal by worker thread */ 249 250 int min_pkt_size; /* = ETH_ZLEN; */ 251 int max_pkt_size; /* = ETH_ZLEN; */ 252 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */ 253 int nfrags; 254 struct page *page; 255 u64 delay; /* nano-seconds */ 256 257 __u64 count; /* Default No packets to send */ 258 __u64 sofar; /* How many pkts we've sent so far */ 259 __u64 tx_bytes; /* How many bytes we've transmitted */ 260 __u64 errors; /* Errors when trying to transmit, */ 261 262 /* runtime counters relating to clone_skb */ 263 264 __u64 allocated_skbs; 265 __u32 clone_count; 266 int last_ok; /* Was last skb sent? 267 * Or a failed transmit of some sort? 268 * This will keep sequence numbers in order 269 */ 270 ktime_t next_tx; 271 ktime_t started_at; 272 ktime_t stopped_at; 273 u64 idle_acc; /* nano-seconds */ 274 275 __u32 seq_num; 276 277 int clone_skb; /* 278 * Use multiple SKBs during packet gen. 279 * If this number is greater than 1, then 280 * that many copies of the same packet will be 281 * sent before a new packet is allocated. 282 * If you want to send 1024 identical packets 283 * before creating a new packet, 284 * set clone_skb to 1024. 285 */ 286 287 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 288 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 289 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 290 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 291 292 struct in6_addr in6_saddr; 293 struct in6_addr in6_daddr; 294 struct in6_addr cur_in6_daddr; 295 struct in6_addr cur_in6_saddr; 296 /* For ranges */ 297 struct in6_addr min_in6_daddr; 298 struct in6_addr max_in6_daddr; 299 struct in6_addr min_in6_saddr; 300 struct in6_addr max_in6_saddr; 301 302 /* If we're doing ranges, random or incremental, then this 303 * defines the min/max for those ranges. 304 */ 305 __be32 saddr_min; /* inclusive, source IP address */ 306 __be32 saddr_max; /* exclusive, source IP address */ 307 __be32 daddr_min; /* inclusive, dest IP address */ 308 __be32 daddr_max; /* exclusive, dest IP address */ 309 310 __u16 udp_src_min; /* inclusive, source UDP port */ 311 __u16 udp_src_max; /* exclusive, source UDP port */ 312 __u16 udp_dst_min; /* inclusive, dest UDP port */ 313 __u16 udp_dst_max; /* exclusive, dest UDP port */ 314 315 /* DSCP + ECN */ 316 __u8 tos; /* six MSB of (former) IPv4 TOS 317 are for dscp codepoint */ 318 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 319 (see RFC 3260, sec. 4) */ 320 321 /* MPLS */ 322 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */ 323 __be32 labels[MAX_MPLS_LABELS]; 324 325 /* VLAN/SVLAN (802.1Q/Q-in-Q) */ 326 __u8 vlan_p; 327 __u8 vlan_cfi; 328 __u16 vlan_id; /* 0xffff means no vlan tag */ 329 330 __u8 svlan_p; 331 __u8 svlan_cfi; 332 __u16 svlan_id; /* 0xffff means no svlan tag */ 333 334 __u32 src_mac_count; /* How many MACs to iterate through */ 335 __u32 dst_mac_count; /* How many MACs to iterate through */ 336 337 unsigned char dst_mac[ETH_ALEN]; 338 unsigned char src_mac[ETH_ALEN]; 339 340 __u32 cur_dst_mac_offset; 341 __u32 cur_src_mac_offset; 342 __be32 cur_saddr; 343 __be32 cur_daddr; 344 __u16 ip_id; 345 __u16 cur_udp_dst; 346 __u16 cur_udp_src; 347 __u16 cur_queue_map; 348 __u32 cur_pkt_size; 349 __u32 last_pkt_size; 350 351 __u8 hh[14]; 352 /* = { 353 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, 354 355 We fill in SRC address later 356 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 357 0x08, 0x00 358 }; 359 */ 360 __u16 pad; /* pad out the hh struct to an even 16 bytes */ 361 362 struct sk_buff *skb; /* skb we are to transmit next, used for when we 363 * are transmitting the same one multiple times 364 */ 365 struct net_device *odev; /* The out-going device. 366 * Note that the device should have it's 367 * pg_info pointer pointing back to this 368 * device. 369 * Set when the user specifies the out-going 370 * device name (not when the inject is 371 * started as it used to do.) 372 */ 373 char odevname[32]; 374 struct flow_state *flows; 375 unsigned cflows; /* Concurrent flows (config) */ 376 unsigned lflow; /* Flow length (config) */ 377 unsigned nflows; /* accumulated flows (stats) */ 378 unsigned curfl; /* current sequenced flow (state)*/ 379 380 u16 queue_map_min; 381 u16 queue_map_max; 382 __u32 skb_priority; /* skb priority field */ 383 int node; /* Memory node */ 384 385 #ifdef CONFIG_XFRM 386 __u8 ipsmode; /* IPSEC mode (config) */ 387 __u8 ipsproto; /* IPSEC type (config) */ 388 #endif 389 char result[512]; 390 }; 391 392 struct pktgen_hdr { 393 __be32 pgh_magic; 394 __be32 seq_num; 395 __be32 tv_sec; 396 __be32 tv_usec; 397 }; 398 399 static bool pktgen_exiting __read_mostly; 400 401 struct pktgen_thread { 402 spinlock_t if_lock; /* for list of devices */ 403 struct list_head if_list; /* All device here */ 404 struct list_head th_list; 405 struct task_struct *tsk; 406 char result[512]; 407 408 /* Field for thread to receive "posted" events terminate, 409 stop ifs etc. */ 410 411 u32 control; 412 int cpu; 413 414 wait_queue_head_t queue; 415 struct completion start_done; 416 }; 417 418 #define REMOVE 1 419 #define FIND 0 420 421 static inline ktime_t ktime_now(void) 422 { 423 struct timespec ts; 424 ktime_get_ts(&ts); 425 426 return timespec_to_ktime(ts); 427 } 428 429 /* This works even if 32 bit because of careful byte order choice */ 430 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2) 431 { 432 return cmp1.tv64 < cmp2.tv64; 433 } 434 435 static const char version[] = 436 "Packet Generator for packet performance testing. " 437 "Version: " VERSION "\n"; 438 439 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i); 440 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname); 441 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 442 const char *ifname, bool exact); 443 static int pktgen_device_event(struct notifier_block *, unsigned long, void *); 444 static void pktgen_run_all_threads(void); 445 static void pktgen_reset_all_threads(void); 446 static void pktgen_stop_all_threads_ifs(void); 447 448 static void pktgen_stop(struct pktgen_thread *t); 449 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); 450 451 static unsigned int scan_ip6(const char *s, char ip[16]); 452 453 /* Module parameters, defaults. */ 454 static int pg_count_d __read_mostly = 1000; 455 static int pg_delay_d __read_mostly; 456 static int pg_clone_skb_d __read_mostly; 457 static int debug __read_mostly; 458 459 static DEFINE_MUTEX(pktgen_thread_lock); 460 static LIST_HEAD(pktgen_threads); 461 462 static struct notifier_block pktgen_notifier_block = { 463 .notifier_call = pktgen_device_event, 464 }; 465 466 /* 467 * /proc handling functions 468 * 469 */ 470 471 static int pgctrl_show(struct seq_file *seq, void *v) 472 { 473 seq_puts(seq, version); 474 return 0; 475 } 476 477 static ssize_t pgctrl_write(struct file *file, const char __user *buf, 478 size_t count, loff_t *ppos) 479 { 480 int err = 0; 481 char data[128]; 482 483 if (!capable(CAP_NET_ADMIN)) { 484 err = -EPERM; 485 goto out; 486 } 487 488 if (count > sizeof(data)) 489 count = sizeof(data); 490 491 if (copy_from_user(data, buf, count)) { 492 err = -EFAULT; 493 goto out; 494 } 495 data[count - 1] = 0; /* Make string */ 496 497 if (!strcmp(data, "stop")) 498 pktgen_stop_all_threads_ifs(); 499 500 else if (!strcmp(data, "start")) 501 pktgen_run_all_threads(); 502 503 else if (!strcmp(data, "reset")) 504 pktgen_reset_all_threads(); 505 506 else 507 pr_warning("Unknown command: %s\n", data); 508 509 err = count; 510 511 out: 512 return err; 513 } 514 515 static int pgctrl_open(struct inode *inode, struct file *file) 516 { 517 return single_open(file, pgctrl_show, PDE(inode)->data); 518 } 519 520 static const struct file_operations pktgen_fops = { 521 .owner = THIS_MODULE, 522 .open = pgctrl_open, 523 .read = seq_read, 524 .llseek = seq_lseek, 525 .write = pgctrl_write, 526 .release = single_release, 527 }; 528 529 static int pktgen_if_show(struct seq_file *seq, void *v) 530 { 531 const struct pktgen_dev *pkt_dev = seq->private; 532 ktime_t stopped; 533 u64 idle; 534 535 seq_printf(seq, 536 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", 537 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, 538 pkt_dev->max_pkt_size); 539 540 seq_printf(seq, 541 " frags: %d delay: %llu clone_skb: %d ifname: %s\n", 542 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay, 543 pkt_dev->clone_skb, pkt_dev->odevname); 544 545 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, 546 pkt_dev->lflow); 547 548 seq_printf(seq, 549 " queue_map_min: %u queue_map_max: %u\n", 550 pkt_dev->queue_map_min, 551 pkt_dev->queue_map_max); 552 553 if (pkt_dev->skb_priority) 554 seq_printf(seq, " skb_priority: %u\n", 555 pkt_dev->skb_priority); 556 557 if (pkt_dev->flags & F_IPV6) { 558 seq_printf(seq, 559 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n" 560 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n", 561 &pkt_dev->in6_saddr, 562 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr, 563 &pkt_dev->in6_daddr, 564 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr); 565 } else { 566 seq_printf(seq, 567 " dst_min: %s dst_max: %s\n", 568 pkt_dev->dst_min, pkt_dev->dst_max); 569 seq_printf(seq, 570 " src_min: %s src_max: %s\n", 571 pkt_dev->src_min, pkt_dev->src_max); 572 } 573 574 seq_puts(seq, " src_mac: "); 575 576 seq_printf(seq, "%pM ", 577 is_zero_ether_addr(pkt_dev->src_mac) ? 578 pkt_dev->odev->dev_addr : pkt_dev->src_mac); 579 580 seq_printf(seq, "dst_mac: "); 581 seq_printf(seq, "%pM\n", pkt_dev->dst_mac); 582 583 seq_printf(seq, 584 " udp_src_min: %d udp_src_max: %d" 585 " udp_dst_min: %d udp_dst_max: %d\n", 586 pkt_dev->udp_src_min, pkt_dev->udp_src_max, 587 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); 588 589 seq_printf(seq, 590 " src_mac_count: %d dst_mac_count: %d\n", 591 pkt_dev->src_mac_count, pkt_dev->dst_mac_count); 592 593 if (pkt_dev->nr_labels) { 594 unsigned i; 595 seq_printf(seq, " mpls: "); 596 for (i = 0; i < pkt_dev->nr_labels; i++) 597 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), 598 i == pkt_dev->nr_labels-1 ? "\n" : ", "); 599 } 600 601 if (pkt_dev->vlan_id != 0xffff) 602 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", 603 pkt_dev->vlan_id, pkt_dev->vlan_p, 604 pkt_dev->vlan_cfi); 605 606 if (pkt_dev->svlan_id != 0xffff) 607 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", 608 pkt_dev->svlan_id, pkt_dev->svlan_p, 609 pkt_dev->svlan_cfi); 610 611 if (pkt_dev->tos) 612 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); 613 614 if (pkt_dev->traffic_class) 615 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); 616 617 if (pkt_dev->node >= 0) 618 seq_printf(seq, " node: %d\n", pkt_dev->node); 619 620 seq_printf(seq, " Flags: "); 621 622 if (pkt_dev->flags & F_IPV6) 623 seq_printf(seq, "IPV6 "); 624 625 if (pkt_dev->flags & F_IPSRC_RND) 626 seq_printf(seq, "IPSRC_RND "); 627 628 if (pkt_dev->flags & F_IPDST_RND) 629 seq_printf(seq, "IPDST_RND "); 630 631 if (pkt_dev->flags & F_TXSIZE_RND) 632 seq_printf(seq, "TXSIZE_RND "); 633 634 if (pkt_dev->flags & F_UDPSRC_RND) 635 seq_printf(seq, "UDPSRC_RND "); 636 637 if (pkt_dev->flags & F_UDPDST_RND) 638 seq_printf(seq, "UDPDST_RND "); 639 640 if (pkt_dev->flags & F_MPLS_RND) 641 seq_printf(seq, "MPLS_RND "); 642 643 if (pkt_dev->flags & F_QUEUE_MAP_RND) 644 seq_printf(seq, "QUEUE_MAP_RND "); 645 646 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 647 seq_printf(seq, "QUEUE_MAP_CPU "); 648 649 if (pkt_dev->cflows) { 650 if (pkt_dev->flags & F_FLOW_SEQ) 651 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/ 652 else 653 seq_printf(seq, "FLOW_RND "); 654 } 655 656 #ifdef CONFIG_XFRM 657 if (pkt_dev->flags & F_IPSEC_ON) 658 seq_printf(seq, "IPSEC "); 659 #endif 660 661 if (pkt_dev->flags & F_MACSRC_RND) 662 seq_printf(seq, "MACSRC_RND "); 663 664 if (pkt_dev->flags & F_MACDST_RND) 665 seq_printf(seq, "MACDST_RND "); 666 667 if (pkt_dev->flags & F_VID_RND) 668 seq_printf(seq, "VID_RND "); 669 670 if (pkt_dev->flags & F_SVID_RND) 671 seq_printf(seq, "SVID_RND "); 672 673 if (pkt_dev->flags & F_NODE) 674 seq_printf(seq, "NODE_ALLOC "); 675 676 seq_puts(seq, "\n"); 677 678 /* not really stopped, more like last-running-at */ 679 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at; 680 idle = pkt_dev->idle_acc; 681 do_div(idle, NSEC_PER_USEC); 682 683 seq_printf(seq, 684 "Current:\n pkts-sofar: %llu errors: %llu\n", 685 (unsigned long long)pkt_dev->sofar, 686 (unsigned long long)pkt_dev->errors); 687 688 seq_printf(seq, 689 " started: %lluus stopped: %lluus idle: %lluus\n", 690 (unsigned long long) ktime_to_us(pkt_dev->started_at), 691 (unsigned long long) ktime_to_us(stopped), 692 (unsigned long long) idle); 693 694 seq_printf(seq, 695 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 696 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, 697 pkt_dev->cur_src_mac_offset); 698 699 if (pkt_dev->flags & F_IPV6) { 700 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n", 701 &pkt_dev->cur_in6_saddr, 702 &pkt_dev->cur_in6_daddr); 703 } else 704 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n", 705 pkt_dev->cur_saddr, pkt_dev->cur_daddr); 706 707 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", 708 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 709 710 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); 711 712 seq_printf(seq, " flows: %u\n", pkt_dev->nflows); 713 714 if (pkt_dev->result[0]) 715 seq_printf(seq, "Result: %s\n", pkt_dev->result); 716 else 717 seq_printf(seq, "Result: Idle\n"); 718 719 return 0; 720 } 721 722 723 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, 724 __u32 *num) 725 { 726 int i = 0; 727 *num = 0; 728 729 for (; i < maxlen; i++) { 730 int value; 731 char c; 732 *num <<= 4; 733 if (get_user(c, &user_buffer[i])) 734 return -EFAULT; 735 value = hex_to_bin(c); 736 if (value >= 0) 737 *num |= value; 738 else 739 break; 740 } 741 return i; 742 } 743 744 static int count_trail_chars(const char __user * user_buffer, 745 unsigned int maxlen) 746 { 747 int i; 748 749 for (i = 0; i < maxlen; i++) { 750 char c; 751 if (get_user(c, &user_buffer[i])) 752 return -EFAULT; 753 switch (c) { 754 case '\"': 755 case '\n': 756 case '\r': 757 case '\t': 758 case ' ': 759 case '=': 760 break; 761 default: 762 goto done; 763 } 764 } 765 done: 766 return i; 767 } 768 769 static unsigned long num_arg(const char __user * user_buffer, 770 unsigned long maxlen, unsigned long *num) 771 { 772 int i; 773 *num = 0; 774 775 for (i = 0; i < maxlen; i++) { 776 char c; 777 if (get_user(c, &user_buffer[i])) 778 return -EFAULT; 779 if ((c >= '0') && (c <= '9')) { 780 *num *= 10; 781 *num += c - '0'; 782 } else 783 break; 784 } 785 return i; 786 } 787 788 static int strn_len(const char __user * user_buffer, unsigned int maxlen) 789 { 790 int i; 791 792 for (i = 0; i < maxlen; i++) { 793 char c; 794 if (get_user(c, &user_buffer[i])) 795 return -EFAULT; 796 switch (c) { 797 case '\"': 798 case '\n': 799 case '\r': 800 case '\t': 801 case ' ': 802 goto done_str; 803 break; 804 default: 805 break; 806 } 807 } 808 done_str: 809 return i; 810 } 811 812 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) 813 { 814 unsigned n = 0; 815 char c; 816 ssize_t i = 0; 817 int len; 818 819 pkt_dev->nr_labels = 0; 820 do { 821 __u32 tmp; 822 len = hex32_arg(&buffer[i], 8, &tmp); 823 if (len <= 0) 824 return len; 825 pkt_dev->labels[n] = htonl(tmp); 826 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 827 pkt_dev->flags |= F_MPLS_RND; 828 i += len; 829 if (get_user(c, &buffer[i])) 830 return -EFAULT; 831 i++; 832 n++; 833 if (n >= MAX_MPLS_LABELS) 834 return -E2BIG; 835 } while (c == ','); 836 837 pkt_dev->nr_labels = n; 838 return i; 839 } 840 841 static ssize_t pktgen_if_write(struct file *file, 842 const char __user * user_buffer, size_t count, 843 loff_t * offset) 844 { 845 struct seq_file *seq = file->private_data; 846 struct pktgen_dev *pkt_dev = seq->private; 847 int i, max, len; 848 char name[16], valstr[32]; 849 unsigned long value = 0; 850 char *pg_result = NULL; 851 int tmp = 0; 852 char buf[128]; 853 854 pg_result = &(pkt_dev->result[0]); 855 856 if (count < 1) { 857 pr_warning("wrong command format\n"); 858 return -EINVAL; 859 } 860 861 max = count; 862 tmp = count_trail_chars(user_buffer, max); 863 if (tmp < 0) { 864 pr_warning("illegal format\n"); 865 return tmp; 866 } 867 i = tmp; 868 869 /* Read variable name */ 870 871 len = strn_len(&user_buffer[i], sizeof(name) - 1); 872 if (len < 0) 873 return len; 874 875 memset(name, 0, sizeof(name)); 876 if (copy_from_user(name, &user_buffer[i], len)) 877 return -EFAULT; 878 i += len; 879 880 max = count - i; 881 len = count_trail_chars(&user_buffer[i], max); 882 if (len < 0) 883 return len; 884 885 i += len; 886 887 if (debug) { 888 size_t copy = min_t(size_t, count, 1023); 889 char tb[copy + 1]; 890 if (copy_from_user(tb, user_buffer, copy)) 891 return -EFAULT; 892 tb[copy] = 0; 893 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name, 894 (unsigned long)count, tb); 895 } 896 897 if (!strcmp(name, "min_pkt_size")) { 898 len = num_arg(&user_buffer[i], 10, &value); 899 if (len < 0) 900 return len; 901 902 i += len; 903 if (value < 14 + 20 + 8) 904 value = 14 + 20 + 8; 905 if (value != pkt_dev->min_pkt_size) { 906 pkt_dev->min_pkt_size = value; 907 pkt_dev->cur_pkt_size = value; 908 } 909 sprintf(pg_result, "OK: min_pkt_size=%u", 910 pkt_dev->min_pkt_size); 911 return count; 912 } 913 914 if (!strcmp(name, "max_pkt_size")) { 915 len = num_arg(&user_buffer[i], 10, &value); 916 if (len < 0) 917 return len; 918 919 i += len; 920 if (value < 14 + 20 + 8) 921 value = 14 + 20 + 8; 922 if (value != pkt_dev->max_pkt_size) { 923 pkt_dev->max_pkt_size = value; 924 pkt_dev->cur_pkt_size = value; 925 } 926 sprintf(pg_result, "OK: max_pkt_size=%u", 927 pkt_dev->max_pkt_size); 928 return count; 929 } 930 931 /* Shortcut for min = max */ 932 933 if (!strcmp(name, "pkt_size")) { 934 len = num_arg(&user_buffer[i], 10, &value); 935 if (len < 0) 936 return len; 937 938 i += len; 939 if (value < 14 + 20 + 8) 940 value = 14 + 20 + 8; 941 if (value != pkt_dev->min_pkt_size) { 942 pkt_dev->min_pkt_size = value; 943 pkt_dev->max_pkt_size = value; 944 pkt_dev->cur_pkt_size = value; 945 } 946 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 947 return count; 948 } 949 950 if (!strcmp(name, "debug")) { 951 len = num_arg(&user_buffer[i], 10, &value); 952 if (len < 0) 953 return len; 954 955 i += len; 956 debug = value; 957 sprintf(pg_result, "OK: debug=%u", debug); 958 return count; 959 } 960 961 if (!strcmp(name, "frags")) { 962 len = num_arg(&user_buffer[i], 10, &value); 963 if (len < 0) 964 return len; 965 966 i += len; 967 pkt_dev->nfrags = value; 968 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 969 return count; 970 } 971 if (!strcmp(name, "delay")) { 972 len = num_arg(&user_buffer[i], 10, &value); 973 if (len < 0) 974 return len; 975 976 i += len; 977 if (value == 0x7FFFFFFF) 978 pkt_dev->delay = ULLONG_MAX; 979 else 980 pkt_dev->delay = (u64)value; 981 982 sprintf(pg_result, "OK: delay=%llu", 983 (unsigned long long) pkt_dev->delay); 984 return count; 985 } 986 if (!strcmp(name, "rate")) { 987 len = num_arg(&user_buffer[i], 10, &value); 988 if (len < 0) 989 return len; 990 991 i += len; 992 if (!value) 993 return len; 994 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value; 995 if (debug) 996 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 997 998 sprintf(pg_result, "OK: rate=%lu", value); 999 return count; 1000 } 1001 if (!strcmp(name, "ratep")) { 1002 len = num_arg(&user_buffer[i], 10, &value); 1003 if (len < 0) 1004 return len; 1005 1006 i += len; 1007 if (!value) 1008 return len; 1009 pkt_dev->delay = NSEC_PER_SEC/value; 1010 if (debug) 1011 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 1012 1013 sprintf(pg_result, "OK: rate=%lu", value); 1014 return count; 1015 } 1016 if (!strcmp(name, "udp_src_min")) { 1017 len = num_arg(&user_buffer[i], 10, &value); 1018 if (len < 0) 1019 return len; 1020 1021 i += len; 1022 if (value != pkt_dev->udp_src_min) { 1023 pkt_dev->udp_src_min = value; 1024 pkt_dev->cur_udp_src = value; 1025 } 1026 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 1027 return count; 1028 } 1029 if (!strcmp(name, "udp_dst_min")) { 1030 len = num_arg(&user_buffer[i], 10, &value); 1031 if (len < 0) 1032 return len; 1033 1034 i += len; 1035 if (value != pkt_dev->udp_dst_min) { 1036 pkt_dev->udp_dst_min = value; 1037 pkt_dev->cur_udp_dst = value; 1038 } 1039 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 1040 return count; 1041 } 1042 if (!strcmp(name, "udp_src_max")) { 1043 len = num_arg(&user_buffer[i], 10, &value); 1044 if (len < 0) 1045 return len; 1046 1047 i += len; 1048 if (value != pkt_dev->udp_src_max) { 1049 pkt_dev->udp_src_max = value; 1050 pkt_dev->cur_udp_src = value; 1051 } 1052 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 1053 return count; 1054 } 1055 if (!strcmp(name, "udp_dst_max")) { 1056 len = num_arg(&user_buffer[i], 10, &value); 1057 if (len < 0) 1058 return len; 1059 1060 i += len; 1061 if (value != pkt_dev->udp_dst_max) { 1062 pkt_dev->udp_dst_max = value; 1063 pkt_dev->cur_udp_dst = value; 1064 } 1065 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1066 return count; 1067 } 1068 if (!strcmp(name, "clone_skb")) { 1069 len = num_arg(&user_buffer[i], 10, &value); 1070 if (len < 0) 1071 return len; 1072 1073 i += len; 1074 pkt_dev->clone_skb = value; 1075 1076 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1077 return count; 1078 } 1079 if (!strcmp(name, "count")) { 1080 len = num_arg(&user_buffer[i], 10, &value); 1081 if (len < 0) 1082 return len; 1083 1084 i += len; 1085 pkt_dev->count = value; 1086 sprintf(pg_result, "OK: count=%llu", 1087 (unsigned long long)pkt_dev->count); 1088 return count; 1089 } 1090 if (!strcmp(name, "src_mac_count")) { 1091 len = num_arg(&user_buffer[i], 10, &value); 1092 if (len < 0) 1093 return len; 1094 1095 i += len; 1096 if (pkt_dev->src_mac_count != value) { 1097 pkt_dev->src_mac_count = value; 1098 pkt_dev->cur_src_mac_offset = 0; 1099 } 1100 sprintf(pg_result, "OK: src_mac_count=%d", 1101 pkt_dev->src_mac_count); 1102 return count; 1103 } 1104 if (!strcmp(name, "dst_mac_count")) { 1105 len = num_arg(&user_buffer[i], 10, &value); 1106 if (len < 0) 1107 return len; 1108 1109 i += len; 1110 if (pkt_dev->dst_mac_count != value) { 1111 pkt_dev->dst_mac_count = value; 1112 pkt_dev->cur_dst_mac_offset = 0; 1113 } 1114 sprintf(pg_result, "OK: dst_mac_count=%d", 1115 pkt_dev->dst_mac_count); 1116 return count; 1117 } 1118 if (!strcmp(name, "node")) { 1119 len = num_arg(&user_buffer[i], 10, &value); 1120 if (len < 0) 1121 return len; 1122 1123 i += len; 1124 1125 if (node_possible(value)) { 1126 pkt_dev->node = value; 1127 sprintf(pg_result, "OK: node=%d", pkt_dev->node); 1128 if (pkt_dev->page) { 1129 put_page(pkt_dev->page); 1130 pkt_dev->page = NULL; 1131 } 1132 } 1133 else 1134 sprintf(pg_result, "ERROR: node not possible"); 1135 return count; 1136 } 1137 if (!strcmp(name, "flag")) { 1138 char f[32]; 1139 memset(f, 0, 32); 1140 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1141 if (len < 0) 1142 return len; 1143 1144 if (copy_from_user(f, &user_buffer[i], len)) 1145 return -EFAULT; 1146 i += len; 1147 if (strcmp(f, "IPSRC_RND") == 0) 1148 pkt_dev->flags |= F_IPSRC_RND; 1149 1150 else if (strcmp(f, "!IPSRC_RND") == 0) 1151 pkt_dev->flags &= ~F_IPSRC_RND; 1152 1153 else if (strcmp(f, "TXSIZE_RND") == 0) 1154 pkt_dev->flags |= F_TXSIZE_RND; 1155 1156 else if (strcmp(f, "!TXSIZE_RND") == 0) 1157 pkt_dev->flags &= ~F_TXSIZE_RND; 1158 1159 else if (strcmp(f, "IPDST_RND") == 0) 1160 pkt_dev->flags |= F_IPDST_RND; 1161 1162 else if (strcmp(f, "!IPDST_RND") == 0) 1163 pkt_dev->flags &= ~F_IPDST_RND; 1164 1165 else if (strcmp(f, "UDPSRC_RND") == 0) 1166 pkt_dev->flags |= F_UDPSRC_RND; 1167 1168 else if (strcmp(f, "!UDPSRC_RND") == 0) 1169 pkt_dev->flags &= ~F_UDPSRC_RND; 1170 1171 else if (strcmp(f, "UDPDST_RND") == 0) 1172 pkt_dev->flags |= F_UDPDST_RND; 1173 1174 else if (strcmp(f, "!UDPDST_RND") == 0) 1175 pkt_dev->flags &= ~F_UDPDST_RND; 1176 1177 else if (strcmp(f, "MACSRC_RND") == 0) 1178 pkt_dev->flags |= F_MACSRC_RND; 1179 1180 else if (strcmp(f, "!MACSRC_RND") == 0) 1181 pkt_dev->flags &= ~F_MACSRC_RND; 1182 1183 else if (strcmp(f, "MACDST_RND") == 0) 1184 pkt_dev->flags |= F_MACDST_RND; 1185 1186 else if (strcmp(f, "!MACDST_RND") == 0) 1187 pkt_dev->flags &= ~F_MACDST_RND; 1188 1189 else if (strcmp(f, "MPLS_RND") == 0) 1190 pkt_dev->flags |= F_MPLS_RND; 1191 1192 else if (strcmp(f, "!MPLS_RND") == 0) 1193 pkt_dev->flags &= ~F_MPLS_RND; 1194 1195 else if (strcmp(f, "VID_RND") == 0) 1196 pkt_dev->flags |= F_VID_RND; 1197 1198 else if (strcmp(f, "!VID_RND") == 0) 1199 pkt_dev->flags &= ~F_VID_RND; 1200 1201 else if (strcmp(f, "SVID_RND") == 0) 1202 pkt_dev->flags |= F_SVID_RND; 1203 1204 else if (strcmp(f, "!SVID_RND") == 0) 1205 pkt_dev->flags &= ~F_SVID_RND; 1206 1207 else if (strcmp(f, "FLOW_SEQ") == 0) 1208 pkt_dev->flags |= F_FLOW_SEQ; 1209 1210 else if (strcmp(f, "QUEUE_MAP_RND") == 0) 1211 pkt_dev->flags |= F_QUEUE_MAP_RND; 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_CPU") == 0) 1217 pkt_dev->flags |= F_QUEUE_MAP_CPU; 1218 1219 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0) 1220 pkt_dev->flags &= ~F_QUEUE_MAP_CPU; 1221 #ifdef CONFIG_XFRM 1222 else if (strcmp(f, "IPSEC") == 0) 1223 pkt_dev->flags |= F_IPSEC_ON; 1224 #endif 1225 1226 else if (strcmp(f, "!IPV6") == 0) 1227 pkt_dev->flags &= ~F_IPV6; 1228 1229 else if (strcmp(f, "NODE_ALLOC") == 0) 1230 pkt_dev->flags |= F_NODE; 1231 1232 else if (strcmp(f, "!NODE_ALLOC") == 0) 1233 pkt_dev->flags &= ~F_NODE; 1234 1235 else { 1236 sprintf(pg_result, 1237 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1238 f, 1239 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1240 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n"); 1241 return count; 1242 } 1243 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1244 return count; 1245 } 1246 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1247 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1248 if (len < 0) 1249 return len; 1250 1251 if (copy_from_user(buf, &user_buffer[i], len)) 1252 return -EFAULT; 1253 buf[len] = 0; 1254 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1255 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1256 strncpy(pkt_dev->dst_min, buf, len); 1257 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1258 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1259 } 1260 if (debug) 1261 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n", 1262 pkt_dev->dst_min); 1263 i += len; 1264 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1265 return count; 1266 } 1267 if (!strcmp(name, "dst_max")) { 1268 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1269 if (len < 0) 1270 return len; 1271 1272 1273 if (copy_from_user(buf, &user_buffer[i], len)) 1274 return -EFAULT; 1275 1276 buf[len] = 0; 1277 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1278 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1279 strncpy(pkt_dev->dst_max, buf, len); 1280 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1281 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1282 } 1283 if (debug) 1284 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n", 1285 pkt_dev->dst_max); 1286 i += len; 1287 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1288 return count; 1289 } 1290 if (!strcmp(name, "dst6")) { 1291 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1292 if (len < 0) 1293 return len; 1294 1295 pkt_dev->flags |= F_IPV6; 1296 1297 if (copy_from_user(buf, &user_buffer[i], len)) 1298 return -EFAULT; 1299 buf[len] = 0; 1300 1301 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1302 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr); 1303 1304 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr); 1305 1306 if (debug) 1307 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf); 1308 1309 i += len; 1310 sprintf(pg_result, "OK: dst6=%s", buf); 1311 return count; 1312 } 1313 if (!strcmp(name, "dst6_min")) { 1314 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1315 if (len < 0) 1316 return len; 1317 1318 pkt_dev->flags |= F_IPV6; 1319 1320 if (copy_from_user(buf, &user_buffer[i], len)) 1321 return -EFAULT; 1322 buf[len] = 0; 1323 1324 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1325 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr); 1326 1327 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, 1328 &pkt_dev->min_in6_daddr); 1329 if (debug) 1330 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf); 1331 1332 i += len; 1333 sprintf(pg_result, "OK: dst6_min=%s", buf); 1334 return count; 1335 } 1336 if (!strcmp(name, "dst6_max")) { 1337 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1338 if (len < 0) 1339 return len; 1340 1341 pkt_dev->flags |= F_IPV6; 1342 1343 if (copy_from_user(buf, &user_buffer[i], len)) 1344 return -EFAULT; 1345 buf[len] = 0; 1346 1347 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); 1348 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr); 1349 1350 if (debug) 1351 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf); 1352 1353 i += len; 1354 sprintf(pg_result, "OK: dst6_max=%s", buf); 1355 return count; 1356 } 1357 if (!strcmp(name, "src6")) { 1358 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1359 if (len < 0) 1360 return len; 1361 1362 pkt_dev->flags |= F_IPV6; 1363 1364 if (copy_from_user(buf, &user_buffer[i], len)) 1365 return -EFAULT; 1366 buf[len] = 0; 1367 1368 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr); 1369 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr); 1370 1371 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr); 1372 1373 if (debug) 1374 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf); 1375 1376 i += len; 1377 sprintf(pg_result, "OK: src6=%s", buf); 1378 return count; 1379 } 1380 if (!strcmp(name, "src_min")) { 1381 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1382 if (len < 0) 1383 return len; 1384 1385 if (copy_from_user(buf, &user_buffer[i], len)) 1386 return -EFAULT; 1387 buf[len] = 0; 1388 if (strcmp(buf, pkt_dev->src_min) != 0) { 1389 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1390 strncpy(pkt_dev->src_min, buf, len); 1391 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1392 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1393 } 1394 if (debug) 1395 printk(KERN_DEBUG "pktgen: src_min set to: %s\n", 1396 pkt_dev->src_min); 1397 i += len; 1398 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1399 return count; 1400 } 1401 if (!strcmp(name, "src_max")) { 1402 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1403 if (len < 0) 1404 return len; 1405 1406 if (copy_from_user(buf, &user_buffer[i], len)) 1407 return -EFAULT; 1408 buf[len] = 0; 1409 if (strcmp(buf, pkt_dev->src_max) != 0) { 1410 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1411 strncpy(pkt_dev->src_max, buf, len); 1412 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1413 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1414 } 1415 if (debug) 1416 printk(KERN_DEBUG "pktgen: src_max set to: %s\n", 1417 pkt_dev->src_max); 1418 i += len; 1419 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1420 return count; 1421 } 1422 if (!strcmp(name, "dst_mac")) { 1423 char *v = valstr; 1424 unsigned char old_dmac[ETH_ALEN]; 1425 unsigned char *m = pkt_dev->dst_mac; 1426 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN); 1427 1428 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1429 if (len < 0) 1430 return len; 1431 1432 memset(valstr, 0, sizeof(valstr)); 1433 if (copy_from_user(valstr, &user_buffer[i], len)) 1434 return -EFAULT; 1435 i += len; 1436 1437 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) { 1438 int value; 1439 1440 value = hex_to_bin(*v); 1441 if (value >= 0) 1442 *m = *m * 16 + value; 1443 1444 if (*v == ':') { 1445 m++; 1446 *m = 0; 1447 } 1448 } 1449 1450 /* Set up Dest MAC */ 1451 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac)) 1452 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 1453 1454 sprintf(pg_result, "OK: dstmac"); 1455 return count; 1456 } 1457 if (!strcmp(name, "src_mac")) { 1458 char *v = valstr; 1459 unsigned char old_smac[ETH_ALEN]; 1460 unsigned char *m = pkt_dev->src_mac; 1461 1462 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN); 1463 1464 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1465 if (len < 0) 1466 return len; 1467 1468 memset(valstr, 0, sizeof(valstr)); 1469 if (copy_from_user(valstr, &user_buffer[i], len)) 1470 return -EFAULT; 1471 i += len; 1472 1473 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) { 1474 int value; 1475 1476 value = hex_to_bin(*v); 1477 if (value >= 0) 1478 *m = *m * 16 + value; 1479 1480 if (*v == ':') { 1481 m++; 1482 *m = 0; 1483 } 1484 } 1485 1486 /* Set up Src MAC */ 1487 if (compare_ether_addr(old_smac, pkt_dev->src_mac)) 1488 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN); 1489 1490 sprintf(pg_result, "OK: srcmac"); 1491 return count; 1492 } 1493 1494 if (!strcmp(name, "clear_counters")) { 1495 pktgen_clear_counters(pkt_dev); 1496 sprintf(pg_result, "OK: Clearing counters.\n"); 1497 return count; 1498 } 1499 1500 if (!strcmp(name, "flows")) { 1501 len = num_arg(&user_buffer[i], 10, &value); 1502 if (len < 0) 1503 return len; 1504 1505 i += len; 1506 if (value > MAX_CFLOWS) 1507 value = MAX_CFLOWS; 1508 1509 pkt_dev->cflows = value; 1510 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1511 return count; 1512 } 1513 1514 if (!strcmp(name, "flowlen")) { 1515 len = num_arg(&user_buffer[i], 10, &value); 1516 if (len < 0) 1517 return len; 1518 1519 i += len; 1520 pkt_dev->lflow = value; 1521 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1522 return count; 1523 } 1524 1525 if (!strcmp(name, "queue_map_min")) { 1526 len = num_arg(&user_buffer[i], 5, &value); 1527 if (len < 0) 1528 return len; 1529 1530 i += len; 1531 pkt_dev->queue_map_min = value; 1532 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1533 return count; 1534 } 1535 1536 if (!strcmp(name, "queue_map_max")) { 1537 len = num_arg(&user_buffer[i], 5, &value); 1538 if (len < 0) 1539 return len; 1540 1541 i += len; 1542 pkt_dev->queue_map_max = value; 1543 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1544 return count; 1545 } 1546 1547 if (!strcmp(name, "mpls")) { 1548 unsigned n, cnt; 1549 1550 len = get_labels(&user_buffer[i], pkt_dev); 1551 if (len < 0) 1552 return len; 1553 i += len; 1554 cnt = sprintf(pg_result, "OK: mpls="); 1555 for (n = 0; n < pkt_dev->nr_labels; n++) 1556 cnt += sprintf(pg_result + cnt, 1557 "%08x%s", ntohl(pkt_dev->labels[n]), 1558 n == pkt_dev->nr_labels-1 ? "" : ","); 1559 1560 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1561 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1562 pkt_dev->svlan_id = 0xffff; 1563 1564 if (debug) 1565 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n"); 1566 } 1567 return count; 1568 } 1569 1570 if (!strcmp(name, "vlan_id")) { 1571 len = num_arg(&user_buffer[i], 4, &value); 1572 if (len < 0) 1573 return len; 1574 1575 i += len; 1576 if (value <= 4095) { 1577 pkt_dev->vlan_id = value; /* turn on VLAN */ 1578 1579 if (debug) 1580 printk(KERN_DEBUG "pktgen: VLAN turned on\n"); 1581 1582 if (debug && pkt_dev->nr_labels) 1583 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1584 1585 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1586 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1587 } else { 1588 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1589 pkt_dev->svlan_id = 0xffff; 1590 1591 if (debug) 1592 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1593 } 1594 return count; 1595 } 1596 1597 if (!strcmp(name, "vlan_p")) { 1598 len = num_arg(&user_buffer[i], 1, &value); 1599 if (len < 0) 1600 return len; 1601 1602 i += len; 1603 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1604 pkt_dev->vlan_p = value; 1605 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1606 } else { 1607 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1608 } 1609 return count; 1610 } 1611 1612 if (!strcmp(name, "vlan_cfi")) { 1613 len = num_arg(&user_buffer[i], 1, &value); 1614 if (len < 0) 1615 return len; 1616 1617 i += len; 1618 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1619 pkt_dev->vlan_cfi = value; 1620 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1621 } else { 1622 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1623 } 1624 return count; 1625 } 1626 1627 if (!strcmp(name, "svlan_id")) { 1628 len = num_arg(&user_buffer[i], 4, &value); 1629 if (len < 0) 1630 return len; 1631 1632 i += len; 1633 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1634 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1635 1636 if (debug) 1637 printk(KERN_DEBUG "pktgen: SVLAN turned on\n"); 1638 1639 if (debug && pkt_dev->nr_labels) 1640 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n"); 1641 1642 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1643 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1644 } else { 1645 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1646 pkt_dev->svlan_id = 0xffff; 1647 1648 if (debug) 1649 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n"); 1650 } 1651 return count; 1652 } 1653 1654 if (!strcmp(name, "svlan_p")) { 1655 len = num_arg(&user_buffer[i], 1, &value); 1656 if (len < 0) 1657 return len; 1658 1659 i += len; 1660 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1661 pkt_dev->svlan_p = value; 1662 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1663 } else { 1664 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1665 } 1666 return count; 1667 } 1668 1669 if (!strcmp(name, "svlan_cfi")) { 1670 len = num_arg(&user_buffer[i], 1, &value); 1671 if (len < 0) 1672 return len; 1673 1674 i += len; 1675 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1676 pkt_dev->svlan_cfi = value; 1677 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1678 } else { 1679 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1680 } 1681 return count; 1682 } 1683 1684 if (!strcmp(name, "tos")) { 1685 __u32 tmp_value = 0; 1686 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1687 if (len < 0) 1688 return len; 1689 1690 i += len; 1691 if (len == 2) { 1692 pkt_dev->tos = tmp_value; 1693 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1694 } else { 1695 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1696 } 1697 return count; 1698 } 1699 1700 if (!strcmp(name, "traffic_class")) { 1701 __u32 tmp_value = 0; 1702 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1703 if (len < 0) 1704 return len; 1705 1706 i += len; 1707 if (len == 2) { 1708 pkt_dev->traffic_class = tmp_value; 1709 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1710 } else { 1711 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1712 } 1713 return count; 1714 } 1715 1716 if (!strcmp(name, "skb_priority")) { 1717 len = num_arg(&user_buffer[i], 9, &value); 1718 if (len < 0) 1719 return len; 1720 1721 i += len; 1722 pkt_dev->skb_priority = value; 1723 sprintf(pg_result, "OK: skb_priority=%i", 1724 pkt_dev->skb_priority); 1725 return count; 1726 } 1727 1728 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1729 return -EINVAL; 1730 } 1731 1732 static int pktgen_if_open(struct inode *inode, struct file *file) 1733 { 1734 return single_open(file, pktgen_if_show, PDE(inode)->data); 1735 } 1736 1737 static const struct file_operations pktgen_if_fops = { 1738 .owner = THIS_MODULE, 1739 .open = pktgen_if_open, 1740 .read = seq_read, 1741 .llseek = seq_lseek, 1742 .write = pktgen_if_write, 1743 .release = single_release, 1744 }; 1745 1746 static int pktgen_thread_show(struct seq_file *seq, void *v) 1747 { 1748 struct pktgen_thread *t = seq->private; 1749 const struct pktgen_dev *pkt_dev; 1750 1751 BUG_ON(!t); 1752 1753 seq_printf(seq, "Running: "); 1754 1755 if_lock(t); 1756 list_for_each_entry(pkt_dev, &t->if_list, list) 1757 if (pkt_dev->running) 1758 seq_printf(seq, "%s ", pkt_dev->odevname); 1759 1760 seq_printf(seq, "\nStopped: "); 1761 1762 list_for_each_entry(pkt_dev, &t->if_list, list) 1763 if (!pkt_dev->running) 1764 seq_printf(seq, "%s ", pkt_dev->odevname); 1765 1766 if (t->result[0]) 1767 seq_printf(seq, "\nResult: %s\n", t->result); 1768 else 1769 seq_printf(seq, "\nResult: NA\n"); 1770 1771 if_unlock(t); 1772 1773 return 0; 1774 } 1775 1776 static ssize_t pktgen_thread_write(struct file *file, 1777 const char __user * user_buffer, 1778 size_t count, loff_t * offset) 1779 { 1780 struct seq_file *seq = file->private_data; 1781 struct pktgen_thread *t = seq->private; 1782 int i, max, len, ret; 1783 char name[40]; 1784 char *pg_result; 1785 1786 if (count < 1) { 1787 // sprintf(pg_result, "Wrong command format"); 1788 return -EINVAL; 1789 } 1790 1791 max = count; 1792 len = count_trail_chars(user_buffer, max); 1793 if (len < 0) 1794 return len; 1795 1796 i = len; 1797 1798 /* Read variable name */ 1799 1800 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1801 if (len < 0) 1802 return len; 1803 1804 memset(name, 0, sizeof(name)); 1805 if (copy_from_user(name, &user_buffer[i], len)) 1806 return -EFAULT; 1807 i += len; 1808 1809 max = count - i; 1810 len = count_trail_chars(&user_buffer[i], max); 1811 if (len < 0) 1812 return len; 1813 1814 i += len; 1815 1816 if (debug) 1817 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n", 1818 name, (unsigned long)count); 1819 1820 if (!t) { 1821 pr_err("ERROR: No thread\n"); 1822 ret = -EINVAL; 1823 goto out; 1824 } 1825 1826 pg_result = &(t->result[0]); 1827 1828 if (!strcmp(name, "add_device")) { 1829 char f[32]; 1830 memset(f, 0, 32); 1831 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1832 if (len < 0) { 1833 ret = len; 1834 goto out; 1835 } 1836 if (copy_from_user(f, &user_buffer[i], len)) 1837 return -EFAULT; 1838 i += len; 1839 mutex_lock(&pktgen_thread_lock); 1840 pktgen_add_device(t, f); 1841 mutex_unlock(&pktgen_thread_lock); 1842 ret = count; 1843 sprintf(pg_result, "OK: add_device=%s", f); 1844 goto out; 1845 } 1846 1847 if (!strcmp(name, "rem_device_all")) { 1848 mutex_lock(&pktgen_thread_lock); 1849 t->control |= T_REMDEVALL; 1850 mutex_unlock(&pktgen_thread_lock); 1851 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1852 ret = count; 1853 sprintf(pg_result, "OK: rem_device_all"); 1854 goto out; 1855 } 1856 1857 if (!strcmp(name, "max_before_softirq")) { 1858 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1859 ret = count; 1860 goto out; 1861 } 1862 1863 ret = -EINVAL; 1864 out: 1865 return ret; 1866 } 1867 1868 static int pktgen_thread_open(struct inode *inode, struct file *file) 1869 { 1870 return single_open(file, pktgen_thread_show, PDE(inode)->data); 1871 } 1872 1873 static const struct file_operations pktgen_thread_fops = { 1874 .owner = THIS_MODULE, 1875 .open = pktgen_thread_open, 1876 .read = seq_read, 1877 .llseek = seq_lseek, 1878 .write = pktgen_thread_write, 1879 .release = single_release, 1880 }; 1881 1882 /* Think find or remove for NN */ 1883 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove) 1884 { 1885 struct pktgen_thread *t; 1886 struct pktgen_dev *pkt_dev = NULL; 1887 bool exact = (remove == FIND); 1888 1889 list_for_each_entry(t, &pktgen_threads, th_list) { 1890 pkt_dev = pktgen_find_dev(t, ifname, exact); 1891 if (pkt_dev) { 1892 if (remove) { 1893 if_lock(t); 1894 pkt_dev->removal_mark = 1; 1895 t->control |= T_REMDEV; 1896 if_unlock(t); 1897 } 1898 break; 1899 } 1900 } 1901 return pkt_dev; 1902 } 1903 1904 /* 1905 * mark a device for removal 1906 */ 1907 static void pktgen_mark_device(const char *ifname) 1908 { 1909 struct pktgen_dev *pkt_dev = NULL; 1910 const int max_tries = 10, msec_per_try = 125; 1911 int i = 0; 1912 1913 mutex_lock(&pktgen_thread_lock); 1914 pr_debug("%s: marking %s for removal\n", __func__, ifname); 1915 1916 while (1) { 1917 1918 pkt_dev = __pktgen_NN_threads(ifname, REMOVE); 1919 if (pkt_dev == NULL) 1920 break; /* success */ 1921 1922 mutex_unlock(&pktgen_thread_lock); 1923 pr_debug("%s: waiting for %s to disappear....\n", 1924 __func__, ifname); 1925 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1926 mutex_lock(&pktgen_thread_lock); 1927 1928 if (++i >= max_tries) { 1929 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n", 1930 __func__, msec_per_try * i, ifname); 1931 break; 1932 } 1933 1934 } 1935 1936 mutex_unlock(&pktgen_thread_lock); 1937 } 1938 1939 static void pktgen_change_name(struct net_device *dev) 1940 { 1941 struct pktgen_thread *t; 1942 1943 list_for_each_entry(t, &pktgen_threads, th_list) { 1944 struct pktgen_dev *pkt_dev; 1945 1946 list_for_each_entry(pkt_dev, &t->if_list, list) { 1947 if (pkt_dev->odev != dev) 1948 continue; 1949 1950 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 1951 1952 pkt_dev->entry = proc_create_data(dev->name, 0600, 1953 pg_proc_dir, 1954 &pktgen_if_fops, 1955 pkt_dev); 1956 if (!pkt_dev->entry) 1957 pr_err("can't move proc entry for '%s'\n", 1958 dev->name); 1959 break; 1960 } 1961 } 1962 } 1963 1964 static int pktgen_device_event(struct notifier_block *unused, 1965 unsigned long event, void *ptr) 1966 { 1967 struct net_device *dev = ptr; 1968 1969 if (!net_eq(dev_net(dev), &init_net)) 1970 return NOTIFY_DONE; 1971 1972 /* It is OK that we do not hold the group lock right now, 1973 * as we run under the RTNL lock. 1974 */ 1975 1976 switch (event) { 1977 case NETDEV_CHANGENAME: 1978 pktgen_change_name(dev); 1979 break; 1980 1981 case NETDEV_UNREGISTER: 1982 pktgen_mark_device(dev->name); 1983 break; 1984 } 1985 1986 return NOTIFY_DONE; 1987 } 1988 1989 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev, 1990 const char *ifname) 1991 { 1992 char b[IFNAMSIZ+5]; 1993 int i; 1994 1995 for (i = 0; ifname[i] != '@'; i++) { 1996 if (i == IFNAMSIZ) 1997 break; 1998 1999 b[i] = ifname[i]; 2000 } 2001 b[i] = 0; 2002 2003 return dev_get_by_name(&init_net, b); 2004 } 2005 2006 2007 /* Associate pktgen_dev with a device. */ 2008 2009 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname) 2010 { 2011 struct net_device *odev; 2012 int err; 2013 2014 /* Clean old setups */ 2015 if (pkt_dev->odev) { 2016 dev_put(pkt_dev->odev); 2017 pkt_dev->odev = NULL; 2018 } 2019 2020 odev = pktgen_dev_get_by_name(pkt_dev, ifname); 2021 if (!odev) { 2022 pr_err("no such netdevice: \"%s\"\n", ifname); 2023 return -ENODEV; 2024 } 2025 2026 if (odev->type != ARPHRD_ETHER) { 2027 pr_err("not an ethernet device: \"%s\"\n", ifname); 2028 err = -EINVAL; 2029 } else if (!netif_running(odev)) { 2030 pr_err("device is down: \"%s\"\n", ifname); 2031 err = -ENETDOWN; 2032 } else { 2033 pkt_dev->odev = odev; 2034 return 0; 2035 } 2036 2037 dev_put(odev); 2038 return err; 2039 } 2040 2041 /* Read pkt_dev from the interface and set up internal pktgen_dev 2042 * structure to have the right information to create/send packets 2043 */ 2044 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 2045 { 2046 int ntxq; 2047 2048 if (!pkt_dev->odev) { 2049 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n"); 2050 sprintf(pkt_dev->result, 2051 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 2052 return; 2053 } 2054 2055 /* make sure that we don't pick a non-existing transmit queue */ 2056 ntxq = pkt_dev->odev->real_num_tx_queues; 2057 2058 if (ntxq <= pkt_dev->queue_map_min) { 2059 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2060 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, 2061 pkt_dev->odevname); 2062 pkt_dev->queue_map_min = ntxq - 1; 2063 } 2064 if (pkt_dev->queue_map_max >= ntxq) { 2065 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2066 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, 2067 pkt_dev->odevname); 2068 pkt_dev->queue_map_max = ntxq - 1; 2069 } 2070 2071 /* Default to the interface's mac if not explicitly set. */ 2072 2073 if (is_zero_ether_addr(pkt_dev->src_mac)) 2074 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN); 2075 2076 /* Set up Dest MAC */ 2077 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 2078 2079 /* Set up pkt size */ 2080 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2081 2082 if (pkt_dev->flags & F_IPV6) { 2083 /* 2084 * Skip this automatic address setting until locks or functions 2085 * gets exported 2086 */ 2087 2088 #ifdef NOTNOW 2089 int i, set = 0, err = 1; 2090 struct inet6_dev *idev; 2091 2092 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2093 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2094 set = 1; 2095 break; 2096 } 2097 2098 if (!set) { 2099 2100 /* 2101 * Use linklevel address if unconfigured. 2102 * 2103 * use ipv6_get_lladdr if/when it's get exported 2104 */ 2105 2106 rcu_read_lock(); 2107 idev = __in6_dev_get(pkt_dev->odev); 2108 if (idev) { 2109 struct inet6_ifaddr *ifp; 2110 2111 read_lock_bh(&idev->lock); 2112 for (ifp = idev->addr_list; ifp; 2113 ifp = ifp->if_next) { 2114 if (ifp->scope == IFA_LINK && 2115 !(ifp->flags & IFA_F_TENTATIVE)) { 2116 ipv6_addr_copy(&pkt_dev-> 2117 cur_in6_saddr, 2118 &ifp->addr); 2119 err = 0; 2120 break; 2121 } 2122 } 2123 read_unlock_bh(&idev->lock); 2124 } 2125 rcu_read_unlock(); 2126 if (err) 2127 pr_err("ERROR: IPv6 link address not available\n"); 2128 } 2129 #endif 2130 } else { 2131 pkt_dev->saddr_min = 0; 2132 pkt_dev->saddr_max = 0; 2133 if (strlen(pkt_dev->src_min) == 0) { 2134 2135 struct in_device *in_dev; 2136 2137 rcu_read_lock(); 2138 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2139 if (in_dev) { 2140 if (in_dev->ifa_list) { 2141 pkt_dev->saddr_min = 2142 in_dev->ifa_list->ifa_address; 2143 pkt_dev->saddr_max = pkt_dev->saddr_min; 2144 } 2145 } 2146 rcu_read_unlock(); 2147 } else { 2148 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2149 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2150 } 2151 2152 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2153 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2154 } 2155 /* Initialize current values. */ 2156 pkt_dev->cur_dst_mac_offset = 0; 2157 pkt_dev->cur_src_mac_offset = 0; 2158 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2159 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2160 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2161 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2162 pkt_dev->nflows = 0; 2163 } 2164 2165 2166 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) 2167 { 2168 ktime_t start_time, end_time; 2169 s64 remaining; 2170 struct hrtimer_sleeper t; 2171 2172 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); 2173 hrtimer_set_expires(&t.timer, spin_until); 2174 2175 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer)); 2176 if (remaining <= 0) { 2177 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2178 return; 2179 } 2180 2181 start_time = ktime_now(); 2182 if (remaining < 100000) 2183 ndelay(remaining); /* really small just spin */ 2184 else { 2185 /* see do_nanosleep */ 2186 hrtimer_init_sleeper(&t, current); 2187 do { 2188 set_current_state(TASK_INTERRUPTIBLE); 2189 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS); 2190 if (!hrtimer_active(&t.timer)) 2191 t.task = NULL; 2192 2193 if (likely(t.task)) 2194 schedule(); 2195 2196 hrtimer_cancel(&t.timer); 2197 } while (t.task && pkt_dev->running && !signal_pending(current)); 2198 __set_current_state(TASK_RUNNING); 2199 } 2200 end_time = ktime_now(); 2201 2202 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); 2203 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2204 } 2205 2206 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2207 { 2208 pkt_dev->pkt_overhead = 0; 2209 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2210 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2211 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2212 } 2213 2214 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) 2215 { 2216 return !!(pkt_dev->flows[flow].flags & F_INIT); 2217 } 2218 2219 static inline int f_pick(struct pktgen_dev *pkt_dev) 2220 { 2221 int flow = pkt_dev->curfl; 2222 2223 if (pkt_dev->flags & F_FLOW_SEQ) { 2224 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2225 /* reset time */ 2226 pkt_dev->flows[flow].count = 0; 2227 pkt_dev->flows[flow].flags = 0; 2228 pkt_dev->curfl += 1; 2229 if (pkt_dev->curfl >= pkt_dev->cflows) 2230 pkt_dev->curfl = 0; /*reset */ 2231 } 2232 } else { 2233 flow = random32() % pkt_dev->cflows; 2234 pkt_dev->curfl = flow; 2235 2236 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2237 pkt_dev->flows[flow].count = 0; 2238 pkt_dev->flows[flow].flags = 0; 2239 } 2240 } 2241 2242 return pkt_dev->curfl; 2243 } 2244 2245 2246 #ifdef CONFIG_XFRM 2247 /* If there was already an IPSEC SA, we keep it as is, else 2248 * we go look for it ... 2249 */ 2250 #define DUMMY_MARK 0 2251 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2252 { 2253 struct xfrm_state *x = pkt_dev->flows[flow].x; 2254 if (!x) { 2255 /*slow path: we dont already have xfrm_state*/ 2256 x = xfrm_stateonly_find(&init_net, DUMMY_MARK, 2257 (xfrm_address_t *)&pkt_dev->cur_daddr, 2258 (xfrm_address_t *)&pkt_dev->cur_saddr, 2259 AF_INET, 2260 pkt_dev->ipsmode, 2261 pkt_dev->ipsproto, 0); 2262 if (x) { 2263 pkt_dev->flows[flow].x = x; 2264 set_pkt_overhead(pkt_dev); 2265 pkt_dev->pkt_overhead += x->props.header_len; 2266 } 2267 2268 } 2269 } 2270 #endif 2271 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2272 { 2273 2274 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2275 pkt_dev->cur_queue_map = smp_processor_id(); 2276 2277 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { 2278 __u16 t; 2279 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2280 t = random32() % 2281 (pkt_dev->queue_map_max - 2282 pkt_dev->queue_map_min + 1) 2283 + pkt_dev->queue_map_min; 2284 } else { 2285 t = pkt_dev->cur_queue_map + 1; 2286 if (t > pkt_dev->queue_map_max) 2287 t = pkt_dev->queue_map_min; 2288 } 2289 pkt_dev->cur_queue_map = t; 2290 } 2291 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2292 } 2293 2294 /* Increment/randomize headers according to flags and current values 2295 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2296 */ 2297 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2298 { 2299 __u32 imn; 2300 __u32 imx; 2301 int flow = 0; 2302 2303 if (pkt_dev->cflows) 2304 flow = f_pick(pkt_dev); 2305 2306 /* Deal with source MAC */ 2307 if (pkt_dev->src_mac_count > 1) { 2308 __u32 mc; 2309 __u32 tmp; 2310 2311 if (pkt_dev->flags & F_MACSRC_RND) 2312 mc = random32() % pkt_dev->src_mac_count; 2313 else { 2314 mc = pkt_dev->cur_src_mac_offset++; 2315 if (pkt_dev->cur_src_mac_offset >= 2316 pkt_dev->src_mac_count) 2317 pkt_dev->cur_src_mac_offset = 0; 2318 } 2319 2320 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2321 pkt_dev->hh[11] = tmp; 2322 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2323 pkt_dev->hh[10] = tmp; 2324 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2325 pkt_dev->hh[9] = tmp; 2326 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2327 pkt_dev->hh[8] = tmp; 2328 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2329 pkt_dev->hh[7] = tmp; 2330 } 2331 2332 /* Deal with Destination MAC */ 2333 if (pkt_dev->dst_mac_count > 1) { 2334 __u32 mc; 2335 __u32 tmp; 2336 2337 if (pkt_dev->flags & F_MACDST_RND) 2338 mc = random32() % pkt_dev->dst_mac_count; 2339 2340 else { 2341 mc = pkt_dev->cur_dst_mac_offset++; 2342 if (pkt_dev->cur_dst_mac_offset >= 2343 pkt_dev->dst_mac_count) { 2344 pkt_dev->cur_dst_mac_offset = 0; 2345 } 2346 } 2347 2348 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2349 pkt_dev->hh[5] = tmp; 2350 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2351 pkt_dev->hh[4] = tmp; 2352 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2353 pkt_dev->hh[3] = tmp; 2354 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2355 pkt_dev->hh[2] = tmp; 2356 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2357 pkt_dev->hh[1] = tmp; 2358 } 2359 2360 if (pkt_dev->flags & F_MPLS_RND) { 2361 unsigned i; 2362 for (i = 0; i < pkt_dev->nr_labels; i++) 2363 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2364 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2365 ((__force __be32)random32() & 2366 htonl(0x000fffff)); 2367 } 2368 2369 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2370 pkt_dev->vlan_id = random32() & (4096-1); 2371 } 2372 2373 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2374 pkt_dev->svlan_id = random32() & (4096 - 1); 2375 } 2376 2377 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2378 if (pkt_dev->flags & F_UDPSRC_RND) 2379 pkt_dev->cur_udp_src = random32() % 2380 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2381 + pkt_dev->udp_src_min; 2382 2383 else { 2384 pkt_dev->cur_udp_src++; 2385 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2386 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2387 } 2388 } 2389 2390 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2391 if (pkt_dev->flags & F_UDPDST_RND) { 2392 pkt_dev->cur_udp_dst = random32() % 2393 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2394 + pkt_dev->udp_dst_min; 2395 } else { 2396 pkt_dev->cur_udp_dst++; 2397 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2398 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2399 } 2400 } 2401 2402 if (!(pkt_dev->flags & F_IPV6)) { 2403 2404 imn = ntohl(pkt_dev->saddr_min); 2405 imx = ntohl(pkt_dev->saddr_max); 2406 if (imn < imx) { 2407 __u32 t; 2408 if (pkt_dev->flags & F_IPSRC_RND) 2409 t = random32() % (imx - imn) + imn; 2410 else { 2411 t = ntohl(pkt_dev->cur_saddr); 2412 t++; 2413 if (t > imx) 2414 t = imn; 2415 2416 } 2417 pkt_dev->cur_saddr = htonl(t); 2418 } 2419 2420 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2421 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2422 } else { 2423 imn = ntohl(pkt_dev->daddr_min); 2424 imx = ntohl(pkt_dev->daddr_max); 2425 if (imn < imx) { 2426 __u32 t; 2427 __be32 s; 2428 if (pkt_dev->flags & F_IPDST_RND) { 2429 2430 t = random32() % (imx - imn) + imn; 2431 s = htonl(t); 2432 2433 while (ipv4_is_loopback(s) || 2434 ipv4_is_multicast(s) || 2435 ipv4_is_lbcast(s) || 2436 ipv4_is_zeronet(s) || 2437 ipv4_is_local_multicast(s)) { 2438 t = random32() % (imx - imn) + imn; 2439 s = htonl(t); 2440 } 2441 pkt_dev->cur_daddr = s; 2442 } else { 2443 t = ntohl(pkt_dev->cur_daddr); 2444 t++; 2445 if (t > imx) { 2446 t = imn; 2447 } 2448 pkt_dev->cur_daddr = htonl(t); 2449 } 2450 } 2451 if (pkt_dev->cflows) { 2452 pkt_dev->flows[flow].flags |= F_INIT; 2453 pkt_dev->flows[flow].cur_daddr = 2454 pkt_dev->cur_daddr; 2455 #ifdef CONFIG_XFRM 2456 if (pkt_dev->flags & F_IPSEC_ON) 2457 get_ipsec_sa(pkt_dev, flow); 2458 #endif 2459 pkt_dev->nflows++; 2460 } 2461 } 2462 } else { /* IPV6 * */ 2463 2464 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 && 2465 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 && 2466 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 && 2467 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ; 2468 else { 2469 int i; 2470 2471 /* Only random destinations yet */ 2472 2473 for (i = 0; i < 4; i++) { 2474 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2475 (((__force __be32)random32() | 2476 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2477 pkt_dev->max_in6_daddr.s6_addr32[i]); 2478 } 2479 } 2480 } 2481 2482 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2483 __u32 t; 2484 if (pkt_dev->flags & F_TXSIZE_RND) { 2485 t = random32() % 2486 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2487 + pkt_dev->min_pkt_size; 2488 } else { 2489 t = pkt_dev->cur_pkt_size + 1; 2490 if (t > pkt_dev->max_pkt_size) 2491 t = pkt_dev->min_pkt_size; 2492 } 2493 pkt_dev->cur_pkt_size = t; 2494 } 2495 2496 set_cur_queue_map(pkt_dev); 2497 2498 pkt_dev->flows[flow].count++; 2499 } 2500 2501 2502 #ifdef CONFIG_XFRM 2503 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2504 { 2505 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2506 int err = 0; 2507 2508 if (!x) 2509 return 0; 2510 /* XXX: we dont support tunnel mode for now until 2511 * we resolve the dst issue */ 2512 if (x->props.mode != XFRM_MODE_TRANSPORT) 2513 return 0; 2514 2515 spin_lock(&x->lock); 2516 2517 err = x->outer_mode->output(x, skb); 2518 if (err) 2519 goto error; 2520 err = x->type->output(x, skb); 2521 if (err) 2522 goto error; 2523 2524 x->curlft.bytes += skb->len; 2525 x->curlft.packets++; 2526 error: 2527 spin_unlock(&x->lock); 2528 return err; 2529 } 2530 2531 static void free_SAs(struct pktgen_dev *pkt_dev) 2532 { 2533 if (pkt_dev->cflows) { 2534 /* let go of the SAs if we have them */ 2535 int i; 2536 for (i = 0; i < pkt_dev->cflows; i++) { 2537 struct xfrm_state *x = pkt_dev->flows[i].x; 2538 if (x) { 2539 xfrm_state_put(x); 2540 pkt_dev->flows[i].x = NULL; 2541 } 2542 } 2543 } 2544 } 2545 2546 static int process_ipsec(struct pktgen_dev *pkt_dev, 2547 struct sk_buff *skb, __be16 protocol) 2548 { 2549 if (pkt_dev->flags & F_IPSEC_ON) { 2550 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2551 int nhead = 0; 2552 if (x) { 2553 int ret; 2554 __u8 *eth; 2555 nhead = x->props.header_len - skb_headroom(skb); 2556 if (nhead > 0) { 2557 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2558 if (ret < 0) { 2559 pr_err("Error expanding ipsec packet %d\n", 2560 ret); 2561 goto err; 2562 } 2563 } 2564 2565 /* ipsec is not expecting ll header */ 2566 skb_pull(skb, ETH_HLEN); 2567 ret = pktgen_output_ipsec(skb, pkt_dev); 2568 if (ret) { 2569 pr_err("Error creating ipsec packet %d\n", ret); 2570 goto err; 2571 } 2572 /* restore ll */ 2573 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2574 memcpy(eth, pkt_dev->hh, 12); 2575 *(u16 *) ð[12] = protocol; 2576 } 2577 } 2578 return 1; 2579 err: 2580 kfree_skb(skb); 2581 return 0; 2582 } 2583 #endif 2584 2585 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2586 { 2587 unsigned i; 2588 for (i = 0; i < pkt_dev->nr_labels; i++) 2589 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2590 2591 mpls--; 2592 *mpls |= MPLS_STACK_BOTTOM; 2593 } 2594 2595 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2596 unsigned int prio) 2597 { 2598 return htons(id | (cfi << 12) | (prio << 13)); 2599 } 2600 2601 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb, 2602 int datalen) 2603 { 2604 struct timeval timestamp; 2605 struct pktgen_hdr *pgh; 2606 2607 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh)); 2608 datalen -= sizeof(*pgh); 2609 2610 if (pkt_dev->nfrags <= 0) { 2611 memset(skb_put(skb, datalen), 0, datalen); 2612 } else { 2613 int frags = pkt_dev->nfrags; 2614 int i, len; 2615 int frag_len; 2616 2617 2618 if (frags > MAX_SKB_FRAGS) 2619 frags = MAX_SKB_FRAGS; 2620 len = datalen - frags * PAGE_SIZE; 2621 if (len > 0) { 2622 memset(skb_put(skb, len), 0, len); 2623 datalen = frags * PAGE_SIZE; 2624 } 2625 2626 i = 0; 2627 frag_len = (datalen/frags) < PAGE_SIZE ? 2628 (datalen/frags) : PAGE_SIZE; 2629 while (datalen > 0) { 2630 if (unlikely(!pkt_dev->page)) { 2631 int node = numa_node_id(); 2632 2633 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE)) 2634 node = pkt_dev->node; 2635 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0); 2636 if (!pkt_dev->page) 2637 break; 2638 } 2639 skb_shinfo(skb)->frags[i].page = pkt_dev->page; 2640 get_page(pkt_dev->page); 2641 skb_shinfo(skb)->frags[i].page_offset = 0; 2642 /*last fragment, fill rest of data*/ 2643 if (i == (frags - 1)) 2644 skb_shinfo(skb)->frags[i].size = 2645 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); 2646 else 2647 skb_shinfo(skb)->frags[i].size = frag_len; 2648 datalen -= skb_shinfo(skb)->frags[i].size; 2649 skb->len += skb_shinfo(skb)->frags[i].size; 2650 skb->data_len += skb_shinfo(skb)->frags[i].size; 2651 i++; 2652 skb_shinfo(skb)->nr_frags = i; 2653 } 2654 } 2655 2656 /* Stamp the time, and sequence number, 2657 * convert them to network byte order 2658 */ 2659 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2660 pgh->seq_num = htonl(pkt_dev->seq_num); 2661 2662 do_gettimeofday(×tamp); 2663 pgh->tv_sec = htonl(timestamp.tv_sec); 2664 pgh->tv_usec = htonl(timestamp.tv_usec); 2665 } 2666 2667 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2668 struct pktgen_dev *pkt_dev) 2669 { 2670 struct sk_buff *skb = NULL; 2671 __u8 *eth; 2672 struct udphdr *udph; 2673 int datalen, iplen; 2674 struct iphdr *iph; 2675 __be16 protocol = htons(ETH_P_IP); 2676 __be32 *mpls; 2677 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2678 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2679 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2680 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2681 u16 queue_map; 2682 2683 if (pkt_dev->nr_labels) 2684 protocol = htons(ETH_P_MPLS_UC); 2685 2686 if (pkt_dev->vlan_id != 0xffff) 2687 protocol = htons(ETH_P_8021Q); 2688 2689 /* Update any of the values, used when we're incrementing various 2690 * fields. 2691 */ 2692 mod_cur_headers(pkt_dev); 2693 queue_map = pkt_dev->cur_queue_map; 2694 2695 datalen = (odev->hard_header_len + 16) & ~0xf; 2696 2697 if (pkt_dev->flags & F_NODE) { 2698 int node; 2699 2700 if (pkt_dev->node >= 0) 2701 node = pkt_dev->node; 2702 else 2703 node = numa_node_id(); 2704 2705 skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64 2706 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node); 2707 if (likely(skb)) { 2708 skb_reserve(skb, NET_SKB_PAD); 2709 skb->dev = odev; 2710 } 2711 } 2712 else 2713 skb = __netdev_alloc_skb(odev, 2714 pkt_dev->cur_pkt_size + 64 2715 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT); 2716 2717 if (!skb) { 2718 sprintf(pkt_dev->result, "No memory"); 2719 return NULL; 2720 } 2721 prefetchw(skb->data); 2722 2723 skb_reserve(skb, datalen); 2724 2725 /* Reserve for ethernet and IP header */ 2726 eth = (__u8 *) skb_push(skb, 14); 2727 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2728 if (pkt_dev->nr_labels) 2729 mpls_push(mpls, pkt_dev); 2730 2731 if (pkt_dev->vlan_id != 0xffff) { 2732 if (pkt_dev->svlan_id != 0xffff) { 2733 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2734 *svlan_tci = build_tci(pkt_dev->svlan_id, 2735 pkt_dev->svlan_cfi, 2736 pkt_dev->svlan_p); 2737 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2738 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2739 } 2740 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2741 *vlan_tci = build_tci(pkt_dev->vlan_id, 2742 pkt_dev->vlan_cfi, 2743 pkt_dev->vlan_p); 2744 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2745 *vlan_encapsulated_proto = htons(ETH_P_IP); 2746 } 2747 2748 skb->network_header = skb->tail; 2749 skb->transport_header = skb->network_header + sizeof(struct iphdr); 2750 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr)); 2751 skb_set_queue_mapping(skb, queue_map); 2752 skb->priority = pkt_dev->skb_priority; 2753 2754 iph = ip_hdr(skb); 2755 udph = udp_hdr(skb); 2756 2757 memcpy(eth, pkt_dev->hh, 12); 2758 *(__be16 *) & eth[12] = protocol; 2759 2760 /* Eth + IPh + UDPh + mpls */ 2761 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2762 pkt_dev->pkt_overhead; 2763 if (datalen < sizeof(struct pktgen_hdr)) 2764 datalen = sizeof(struct pktgen_hdr); 2765 2766 udph->source = htons(pkt_dev->cur_udp_src); 2767 udph->dest = htons(pkt_dev->cur_udp_dst); 2768 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2769 udph->check = 0; /* No checksum */ 2770 2771 iph->ihl = 5; 2772 iph->version = 4; 2773 iph->ttl = 32; 2774 iph->tos = pkt_dev->tos; 2775 iph->protocol = IPPROTO_UDP; /* UDP */ 2776 iph->saddr = pkt_dev->cur_saddr; 2777 iph->daddr = pkt_dev->cur_daddr; 2778 iph->id = htons(pkt_dev->ip_id); 2779 pkt_dev->ip_id++; 2780 iph->frag_off = 0; 2781 iplen = 20 + 8 + datalen; 2782 iph->tot_len = htons(iplen); 2783 iph->check = 0; 2784 iph->check = ip_fast_csum((void *)iph, iph->ihl); 2785 skb->protocol = protocol; 2786 skb->mac_header = (skb->network_header - ETH_HLEN - 2787 pkt_dev->pkt_overhead); 2788 skb->dev = odev; 2789 skb->pkt_type = PACKET_HOST; 2790 pktgen_finalize_skb(pkt_dev, skb, datalen); 2791 2792 #ifdef CONFIG_XFRM 2793 if (!process_ipsec(pkt_dev, skb, protocol)) 2794 return NULL; 2795 #endif 2796 2797 return skb; 2798 } 2799 2800 /* 2801 * scan_ip6, fmt_ip taken from dietlibc-0.21 2802 * Author Felix von Leitner <felix-dietlibc@fefe.de> 2803 * 2804 * Slightly modified for kernel. 2805 * Should be candidate for net/ipv4/utils.c 2806 * --ro 2807 */ 2808 2809 static unsigned int scan_ip6(const char *s, char ip[16]) 2810 { 2811 unsigned int i; 2812 unsigned int len = 0; 2813 unsigned long u; 2814 char suffix[16]; 2815 unsigned int prefixlen = 0; 2816 unsigned int suffixlen = 0; 2817 __be32 tmp; 2818 char *pos; 2819 2820 for (i = 0; i < 16; i++) 2821 ip[i] = 0; 2822 2823 for (;;) { 2824 if (*s == ':') { 2825 len++; 2826 if (s[1] == ':') { /* Found "::", skip to part 2 */ 2827 s += 2; 2828 len++; 2829 break; 2830 } 2831 s++; 2832 } 2833 2834 u = simple_strtoul(s, &pos, 16); 2835 i = pos - s; 2836 if (!i) 2837 return 0; 2838 if (prefixlen == 12 && s[i] == '.') { 2839 2840 /* the last 4 bytes may be written as IPv4 address */ 2841 2842 tmp = in_aton(s); 2843 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp)); 2844 return i + len; 2845 } 2846 ip[prefixlen++] = (u >> 8); 2847 ip[prefixlen++] = (u & 255); 2848 s += i; 2849 len += i; 2850 if (prefixlen == 16) 2851 return len; 2852 } 2853 2854 /* part 2, after "::" */ 2855 for (;;) { 2856 if (*s == ':') { 2857 if (suffixlen == 0) 2858 break; 2859 s++; 2860 len++; 2861 } else if (suffixlen != 0) 2862 break; 2863 2864 u = simple_strtol(s, &pos, 16); 2865 i = pos - s; 2866 if (!i) { 2867 if (*s) 2868 len--; 2869 break; 2870 } 2871 if (suffixlen + prefixlen <= 12 && s[i] == '.') { 2872 tmp = in_aton(s); 2873 memcpy((struct in_addr *)(suffix + suffixlen), &tmp, 2874 sizeof(tmp)); 2875 suffixlen += 4; 2876 len += strlen(s); 2877 break; 2878 } 2879 suffix[suffixlen++] = (u >> 8); 2880 suffix[suffixlen++] = (u & 255); 2881 s += i; 2882 len += i; 2883 if (prefixlen + suffixlen == 16) 2884 break; 2885 } 2886 for (i = 0; i < suffixlen; i++) 2887 ip[16 - suffixlen + i] = suffix[i]; 2888 return len; 2889 } 2890 2891 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2892 struct pktgen_dev *pkt_dev) 2893 { 2894 struct sk_buff *skb = NULL; 2895 __u8 *eth; 2896 struct udphdr *udph; 2897 int datalen; 2898 struct ipv6hdr *iph; 2899 __be16 protocol = htons(ETH_P_IPV6); 2900 __be32 *mpls; 2901 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2902 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2903 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2904 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2905 u16 queue_map; 2906 2907 if (pkt_dev->nr_labels) 2908 protocol = htons(ETH_P_MPLS_UC); 2909 2910 if (pkt_dev->vlan_id != 0xffff) 2911 protocol = htons(ETH_P_8021Q); 2912 2913 /* Update any of the values, used when we're incrementing various 2914 * fields. 2915 */ 2916 mod_cur_headers(pkt_dev); 2917 queue_map = pkt_dev->cur_queue_map; 2918 2919 skb = __netdev_alloc_skb(odev, 2920 pkt_dev->cur_pkt_size + 64 2921 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT); 2922 if (!skb) { 2923 sprintf(pkt_dev->result, "No memory"); 2924 return NULL; 2925 } 2926 prefetchw(skb->data); 2927 2928 skb_reserve(skb, 16); 2929 2930 /* Reserve for ethernet and IP header */ 2931 eth = (__u8 *) skb_push(skb, 14); 2932 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2933 if (pkt_dev->nr_labels) 2934 mpls_push(mpls, pkt_dev); 2935 2936 if (pkt_dev->vlan_id != 0xffff) { 2937 if (pkt_dev->svlan_id != 0xffff) { 2938 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2939 *svlan_tci = build_tci(pkt_dev->svlan_id, 2940 pkt_dev->svlan_cfi, 2941 pkt_dev->svlan_p); 2942 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2943 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2944 } 2945 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2946 *vlan_tci = build_tci(pkt_dev->vlan_id, 2947 pkt_dev->vlan_cfi, 2948 pkt_dev->vlan_p); 2949 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2950 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 2951 } 2952 2953 skb->network_header = skb->tail; 2954 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr); 2955 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr)); 2956 skb_set_queue_mapping(skb, queue_map); 2957 skb->priority = pkt_dev->skb_priority; 2958 iph = ipv6_hdr(skb); 2959 udph = udp_hdr(skb); 2960 2961 memcpy(eth, pkt_dev->hh, 12); 2962 *(__be16 *) ð[12] = protocol; 2963 2964 /* Eth + IPh + UDPh + mpls */ 2965 datalen = pkt_dev->cur_pkt_size - 14 - 2966 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 2967 pkt_dev->pkt_overhead; 2968 2969 if (datalen < sizeof(struct pktgen_hdr)) { 2970 datalen = sizeof(struct pktgen_hdr); 2971 if (net_ratelimit()) 2972 pr_info("increased datalen to %d\n", datalen); 2973 } 2974 2975 udph->source = htons(pkt_dev->cur_udp_src); 2976 udph->dest = htons(pkt_dev->cur_udp_dst); 2977 udph->len = htons(datalen + sizeof(struct udphdr)); 2978 udph->check = 0; /* No checksum */ 2979 2980 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 2981 2982 if (pkt_dev->traffic_class) { 2983 /* Version + traffic class + flow (0) */ 2984 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 2985 } 2986 2987 iph->hop_limit = 32; 2988 2989 iph->payload_len = htons(sizeof(struct udphdr) + datalen); 2990 iph->nexthdr = IPPROTO_UDP; 2991 2992 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr); 2993 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr); 2994 2995 skb->mac_header = (skb->network_header - ETH_HLEN - 2996 pkt_dev->pkt_overhead); 2997 skb->protocol = protocol; 2998 skb->dev = odev; 2999 skb->pkt_type = PACKET_HOST; 3000 3001 pktgen_finalize_skb(pkt_dev, skb, datalen); 3002 3003 return skb; 3004 } 3005 3006 static struct sk_buff *fill_packet(struct net_device *odev, 3007 struct pktgen_dev *pkt_dev) 3008 { 3009 if (pkt_dev->flags & F_IPV6) 3010 return fill_packet_ipv6(odev, pkt_dev); 3011 else 3012 return fill_packet_ipv4(odev, pkt_dev); 3013 } 3014 3015 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 3016 { 3017 pkt_dev->seq_num = 1; 3018 pkt_dev->idle_acc = 0; 3019 pkt_dev->sofar = 0; 3020 pkt_dev->tx_bytes = 0; 3021 pkt_dev->errors = 0; 3022 } 3023 3024 /* Set up structure for sending pkts, clear counters */ 3025 3026 static void pktgen_run(struct pktgen_thread *t) 3027 { 3028 struct pktgen_dev *pkt_dev; 3029 int started = 0; 3030 3031 func_enter(); 3032 3033 if_lock(t); 3034 list_for_each_entry(pkt_dev, &t->if_list, list) { 3035 3036 /* 3037 * setup odev and create initial packet. 3038 */ 3039 pktgen_setup_inject(pkt_dev); 3040 3041 if (pkt_dev->odev) { 3042 pktgen_clear_counters(pkt_dev); 3043 pkt_dev->running = 1; /* Cranke yeself! */ 3044 pkt_dev->skb = NULL; 3045 pkt_dev->started_at = 3046 pkt_dev->next_tx = ktime_now(); 3047 3048 set_pkt_overhead(pkt_dev); 3049 3050 strcpy(pkt_dev->result, "Starting"); 3051 started++; 3052 } else 3053 strcpy(pkt_dev->result, "Error starting"); 3054 } 3055 if_unlock(t); 3056 if (started) 3057 t->control &= ~(T_STOP); 3058 } 3059 3060 static void pktgen_stop_all_threads_ifs(void) 3061 { 3062 struct pktgen_thread *t; 3063 3064 func_enter(); 3065 3066 mutex_lock(&pktgen_thread_lock); 3067 3068 list_for_each_entry(t, &pktgen_threads, th_list) 3069 t->control |= T_STOP; 3070 3071 mutex_unlock(&pktgen_thread_lock); 3072 } 3073 3074 static int thread_is_running(const struct pktgen_thread *t) 3075 { 3076 const struct pktgen_dev *pkt_dev; 3077 3078 list_for_each_entry(pkt_dev, &t->if_list, list) 3079 if (pkt_dev->running) 3080 return 1; 3081 return 0; 3082 } 3083 3084 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3085 { 3086 if_lock(t); 3087 3088 while (thread_is_running(t)) { 3089 3090 if_unlock(t); 3091 3092 msleep_interruptible(100); 3093 3094 if (signal_pending(current)) 3095 goto signal; 3096 if_lock(t); 3097 } 3098 if_unlock(t); 3099 return 1; 3100 signal: 3101 return 0; 3102 } 3103 3104 static int pktgen_wait_all_threads_run(void) 3105 { 3106 struct pktgen_thread *t; 3107 int sig = 1; 3108 3109 mutex_lock(&pktgen_thread_lock); 3110 3111 list_for_each_entry(t, &pktgen_threads, th_list) { 3112 sig = pktgen_wait_thread_run(t); 3113 if (sig == 0) 3114 break; 3115 } 3116 3117 if (sig == 0) 3118 list_for_each_entry(t, &pktgen_threads, th_list) 3119 t->control |= (T_STOP); 3120 3121 mutex_unlock(&pktgen_thread_lock); 3122 return sig; 3123 } 3124 3125 static void pktgen_run_all_threads(void) 3126 { 3127 struct pktgen_thread *t; 3128 3129 func_enter(); 3130 3131 mutex_lock(&pktgen_thread_lock); 3132 3133 list_for_each_entry(t, &pktgen_threads, th_list) 3134 t->control |= (T_RUN); 3135 3136 mutex_unlock(&pktgen_thread_lock); 3137 3138 /* Propagate thread->control */ 3139 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3140 3141 pktgen_wait_all_threads_run(); 3142 } 3143 3144 static void pktgen_reset_all_threads(void) 3145 { 3146 struct pktgen_thread *t; 3147 3148 func_enter(); 3149 3150 mutex_lock(&pktgen_thread_lock); 3151 3152 list_for_each_entry(t, &pktgen_threads, th_list) 3153 t->control |= (T_REMDEVALL); 3154 3155 mutex_unlock(&pktgen_thread_lock); 3156 3157 /* Propagate thread->control */ 3158 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3159 3160 pktgen_wait_all_threads_run(); 3161 } 3162 3163 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3164 { 3165 __u64 bps, mbps, pps; 3166 char *p = pkt_dev->result; 3167 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3168 pkt_dev->started_at); 3169 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3170 3171 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", 3172 (unsigned long long)ktime_to_us(elapsed), 3173 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3174 (unsigned long long)ktime_to_us(idle), 3175 (unsigned long long)pkt_dev->sofar, 3176 pkt_dev->cur_pkt_size, nr_frags); 3177 3178 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3179 ktime_to_ns(elapsed)); 3180 3181 bps = pps * 8 * pkt_dev->cur_pkt_size; 3182 3183 mbps = bps; 3184 do_div(mbps, 1000000); 3185 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3186 (unsigned long long)pps, 3187 (unsigned long long)mbps, 3188 (unsigned long long)bps, 3189 (unsigned long long)pkt_dev->errors); 3190 } 3191 3192 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3193 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3194 { 3195 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3196 3197 if (!pkt_dev->running) { 3198 pr_warning("interface: %s is already stopped\n", 3199 pkt_dev->odevname); 3200 return -EINVAL; 3201 } 3202 3203 kfree_skb(pkt_dev->skb); 3204 pkt_dev->skb = NULL; 3205 pkt_dev->stopped_at = ktime_now(); 3206 pkt_dev->running = 0; 3207 3208 show_results(pkt_dev, nr_frags); 3209 3210 return 0; 3211 } 3212 3213 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3214 { 3215 struct pktgen_dev *pkt_dev, *best = NULL; 3216 3217 if_lock(t); 3218 3219 list_for_each_entry(pkt_dev, &t->if_list, list) { 3220 if (!pkt_dev->running) 3221 continue; 3222 if (best == NULL) 3223 best = pkt_dev; 3224 else if (ktime_lt(pkt_dev->next_tx, best->next_tx)) 3225 best = pkt_dev; 3226 } 3227 if_unlock(t); 3228 return best; 3229 } 3230 3231 static void pktgen_stop(struct pktgen_thread *t) 3232 { 3233 struct pktgen_dev *pkt_dev; 3234 3235 func_enter(); 3236 3237 if_lock(t); 3238 3239 list_for_each_entry(pkt_dev, &t->if_list, list) { 3240 pktgen_stop_device(pkt_dev); 3241 } 3242 3243 if_unlock(t); 3244 } 3245 3246 /* 3247 * one of our devices needs to be removed - find it 3248 * and remove it 3249 */ 3250 static void pktgen_rem_one_if(struct pktgen_thread *t) 3251 { 3252 struct list_head *q, *n; 3253 struct pktgen_dev *cur; 3254 3255 func_enter(); 3256 3257 if_lock(t); 3258 3259 list_for_each_safe(q, n, &t->if_list) { 3260 cur = list_entry(q, struct pktgen_dev, list); 3261 3262 if (!cur->removal_mark) 3263 continue; 3264 3265 kfree_skb(cur->skb); 3266 cur->skb = NULL; 3267 3268 pktgen_remove_device(t, cur); 3269 3270 break; 3271 } 3272 3273 if_unlock(t); 3274 } 3275 3276 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3277 { 3278 struct list_head *q, *n; 3279 struct pktgen_dev *cur; 3280 3281 func_enter(); 3282 3283 /* Remove all devices, free mem */ 3284 3285 if_lock(t); 3286 3287 list_for_each_safe(q, n, &t->if_list) { 3288 cur = list_entry(q, struct pktgen_dev, list); 3289 3290 kfree_skb(cur->skb); 3291 cur->skb = NULL; 3292 3293 pktgen_remove_device(t, cur); 3294 } 3295 3296 if_unlock(t); 3297 } 3298 3299 static void pktgen_rem_thread(struct pktgen_thread *t) 3300 { 3301 /* Remove from the thread list */ 3302 3303 remove_proc_entry(t->tsk->comm, pg_proc_dir); 3304 3305 } 3306 3307 static void pktgen_resched(struct pktgen_dev *pkt_dev) 3308 { 3309 ktime_t idle_start = ktime_now(); 3310 schedule(); 3311 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3312 } 3313 3314 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) 3315 { 3316 ktime_t idle_start = ktime_now(); 3317 3318 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3319 if (signal_pending(current)) 3320 break; 3321 3322 if (need_resched()) 3323 pktgen_resched(pkt_dev); 3324 else 3325 cpu_relax(); 3326 } 3327 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3328 } 3329 3330 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3331 { 3332 struct net_device *odev = pkt_dev->odev; 3333 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *) 3334 = odev->netdev_ops->ndo_start_xmit; 3335 struct netdev_queue *txq; 3336 u16 queue_map; 3337 int ret; 3338 3339 /* If device is offline, then don't send */ 3340 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { 3341 pktgen_stop_device(pkt_dev); 3342 return; 3343 } 3344 3345 /* This is max DELAY, this has special meaning of 3346 * "never transmit" 3347 */ 3348 if (unlikely(pkt_dev->delay == ULLONG_MAX)) { 3349 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX); 3350 return; 3351 } 3352 3353 /* If no skb or clone count exhausted then get new one */ 3354 if (!pkt_dev->skb || (pkt_dev->last_ok && 3355 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { 3356 /* build a new pkt */ 3357 kfree_skb(pkt_dev->skb); 3358 3359 pkt_dev->skb = fill_packet(odev, pkt_dev); 3360 if (pkt_dev->skb == NULL) { 3361 pr_err("ERROR: couldn't allocate skb in fill_packet\n"); 3362 schedule(); 3363 pkt_dev->clone_count--; /* back out increment, OOM */ 3364 return; 3365 } 3366 pkt_dev->last_pkt_size = pkt_dev->skb->len; 3367 pkt_dev->allocated_skbs++; 3368 pkt_dev->clone_count = 0; /* reset counter */ 3369 } 3370 3371 if (pkt_dev->delay && pkt_dev->last_ok) 3372 spin(pkt_dev, pkt_dev->next_tx); 3373 3374 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3375 txq = netdev_get_tx_queue(odev, queue_map); 3376 3377 __netif_tx_lock_bh(txq); 3378 3379 if (unlikely(netif_tx_queue_frozen_or_stopped(txq))) { 3380 ret = NETDEV_TX_BUSY; 3381 pkt_dev->last_ok = 0; 3382 goto unlock; 3383 } 3384 atomic_inc(&(pkt_dev->skb->users)); 3385 ret = (*xmit)(pkt_dev->skb, odev); 3386 3387 switch (ret) { 3388 case NETDEV_TX_OK: 3389 txq_trans_update(txq); 3390 pkt_dev->last_ok = 1; 3391 pkt_dev->sofar++; 3392 pkt_dev->seq_num++; 3393 pkt_dev->tx_bytes += pkt_dev->last_pkt_size; 3394 break; 3395 case NET_XMIT_DROP: 3396 case NET_XMIT_CN: 3397 case NET_XMIT_POLICED: 3398 /* skb has been consumed */ 3399 pkt_dev->errors++; 3400 break; 3401 default: /* Drivers are not supposed to return other values! */ 3402 if (net_ratelimit()) 3403 pr_info("%s xmit error: %d\n", pkt_dev->odevname, ret); 3404 pkt_dev->errors++; 3405 /* fallthru */ 3406 case NETDEV_TX_LOCKED: 3407 case NETDEV_TX_BUSY: 3408 /* Retry it next time */ 3409 atomic_dec(&(pkt_dev->skb->users)); 3410 pkt_dev->last_ok = 0; 3411 } 3412 unlock: 3413 __netif_tx_unlock_bh(txq); 3414 3415 /* If pkt_dev->count is zero, then run forever */ 3416 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3417 pktgen_wait_for_skb(pkt_dev); 3418 3419 /* Done with this */ 3420 pktgen_stop_device(pkt_dev); 3421 } 3422 } 3423 3424 /* 3425 * Main loop of the thread goes here 3426 */ 3427 3428 static int pktgen_thread_worker(void *arg) 3429 { 3430 DEFINE_WAIT(wait); 3431 struct pktgen_thread *t = arg; 3432 struct pktgen_dev *pkt_dev = NULL; 3433 int cpu = t->cpu; 3434 3435 BUG_ON(smp_processor_id() != cpu); 3436 3437 init_waitqueue_head(&t->queue); 3438 complete(&t->start_done); 3439 3440 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); 3441 3442 set_current_state(TASK_INTERRUPTIBLE); 3443 3444 set_freezable(); 3445 3446 while (!kthread_should_stop()) { 3447 pkt_dev = next_to_run(t); 3448 3449 if (unlikely(!pkt_dev && t->control == 0)) { 3450 if (pktgen_exiting) 3451 break; 3452 wait_event_interruptible_timeout(t->queue, 3453 t->control != 0, 3454 HZ/10); 3455 try_to_freeze(); 3456 continue; 3457 } 3458 3459 __set_current_state(TASK_RUNNING); 3460 3461 if (likely(pkt_dev)) { 3462 pktgen_xmit(pkt_dev); 3463 3464 if (need_resched()) 3465 pktgen_resched(pkt_dev); 3466 else 3467 cpu_relax(); 3468 } 3469 3470 if (t->control & T_STOP) { 3471 pktgen_stop(t); 3472 t->control &= ~(T_STOP); 3473 } 3474 3475 if (t->control & T_RUN) { 3476 pktgen_run(t); 3477 t->control &= ~(T_RUN); 3478 } 3479 3480 if (t->control & T_REMDEVALL) { 3481 pktgen_rem_all_ifs(t); 3482 t->control &= ~(T_REMDEVALL); 3483 } 3484 3485 if (t->control & T_REMDEV) { 3486 pktgen_rem_one_if(t); 3487 t->control &= ~(T_REMDEV); 3488 } 3489 3490 try_to_freeze(); 3491 3492 set_current_state(TASK_INTERRUPTIBLE); 3493 } 3494 3495 pr_debug("%s stopping all device\n", t->tsk->comm); 3496 pktgen_stop(t); 3497 3498 pr_debug("%s removing all device\n", t->tsk->comm); 3499 pktgen_rem_all_ifs(t); 3500 3501 pr_debug("%s removing thread\n", t->tsk->comm); 3502 pktgen_rem_thread(t); 3503 3504 /* Wait for kthread_stop */ 3505 while (!kthread_should_stop()) { 3506 set_current_state(TASK_INTERRUPTIBLE); 3507 schedule(); 3508 } 3509 __set_current_state(TASK_RUNNING); 3510 3511 return 0; 3512 } 3513 3514 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3515 const char *ifname, bool exact) 3516 { 3517 struct pktgen_dev *p, *pkt_dev = NULL; 3518 size_t len = strlen(ifname); 3519 3520 if_lock(t); 3521 list_for_each_entry(p, &t->if_list, list) 3522 if (strncmp(p->odevname, ifname, len) == 0) { 3523 if (p->odevname[len]) { 3524 if (exact || p->odevname[len] != '@') 3525 continue; 3526 } 3527 pkt_dev = p; 3528 break; 3529 } 3530 3531 if_unlock(t); 3532 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev); 3533 return pkt_dev; 3534 } 3535 3536 /* 3537 * Adds a dev at front of if_list. 3538 */ 3539 3540 static int add_dev_to_thread(struct pktgen_thread *t, 3541 struct pktgen_dev *pkt_dev) 3542 { 3543 int rv = 0; 3544 3545 if_lock(t); 3546 3547 if (pkt_dev->pg_thread) { 3548 pr_err("ERROR: already assigned to a thread\n"); 3549 rv = -EBUSY; 3550 goto out; 3551 } 3552 3553 list_add(&pkt_dev->list, &t->if_list); 3554 pkt_dev->pg_thread = t; 3555 pkt_dev->running = 0; 3556 3557 out: 3558 if_unlock(t); 3559 return rv; 3560 } 3561 3562 /* Called under thread lock */ 3563 3564 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3565 { 3566 struct pktgen_dev *pkt_dev; 3567 int err; 3568 int node = cpu_to_node(t->cpu); 3569 3570 /* We don't allow a device to be on several threads */ 3571 3572 pkt_dev = __pktgen_NN_threads(ifname, FIND); 3573 if (pkt_dev) { 3574 pr_err("ERROR: interface already used\n"); 3575 return -EBUSY; 3576 } 3577 3578 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); 3579 if (!pkt_dev) 3580 return -ENOMEM; 3581 3582 strcpy(pkt_dev->odevname, ifname); 3583 pkt_dev->flows = vmalloc_node(MAX_CFLOWS * sizeof(struct flow_state), 3584 node); 3585 if (pkt_dev->flows == NULL) { 3586 kfree(pkt_dev); 3587 return -ENOMEM; 3588 } 3589 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state)); 3590 3591 pkt_dev->removal_mark = 0; 3592 pkt_dev->min_pkt_size = ETH_ZLEN; 3593 pkt_dev->max_pkt_size = ETH_ZLEN; 3594 pkt_dev->nfrags = 0; 3595 pkt_dev->clone_skb = pg_clone_skb_d; 3596 pkt_dev->delay = pg_delay_d; 3597 pkt_dev->count = pg_count_d; 3598 pkt_dev->sofar = 0; 3599 pkt_dev->udp_src_min = 9; /* sink port */ 3600 pkt_dev->udp_src_max = 9; 3601 pkt_dev->udp_dst_min = 9; 3602 pkt_dev->udp_dst_max = 9; 3603 3604 pkt_dev->vlan_p = 0; 3605 pkt_dev->vlan_cfi = 0; 3606 pkt_dev->vlan_id = 0xffff; 3607 pkt_dev->svlan_p = 0; 3608 pkt_dev->svlan_cfi = 0; 3609 pkt_dev->svlan_id = 0xffff; 3610 pkt_dev->node = -1; 3611 3612 err = pktgen_setup_dev(pkt_dev, ifname); 3613 if (err) 3614 goto out1; 3615 3616 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir, 3617 &pktgen_if_fops, pkt_dev); 3618 if (!pkt_dev->entry) { 3619 pr_err("cannot create %s/%s procfs entry\n", 3620 PG_PROC_DIR, ifname); 3621 err = -EINVAL; 3622 goto out2; 3623 } 3624 #ifdef CONFIG_XFRM 3625 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3626 pkt_dev->ipsproto = IPPROTO_ESP; 3627 #endif 3628 3629 return add_dev_to_thread(t, pkt_dev); 3630 out2: 3631 dev_put(pkt_dev->odev); 3632 out1: 3633 #ifdef CONFIG_XFRM 3634 free_SAs(pkt_dev); 3635 #endif 3636 vfree(pkt_dev->flows); 3637 kfree(pkt_dev); 3638 return err; 3639 } 3640 3641 static int __init pktgen_create_thread(int cpu) 3642 { 3643 struct pktgen_thread *t; 3644 struct proc_dir_entry *pe; 3645 struct task_struct *p; 3646 3647 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL, 3648 cpu_to_node(cpu)); 3649 if (!t) { 3650 pr_err("ERROR: out of memory, can't create new thread\n"); 3651 return -ENOMEM; 3652 } 3653 3654 spin_lock_init(&t->if_lock); 3655 t->cpu = cpu; 3656 3657 INIT_LIST_HEAD(&t->if_list); 3658 3659 list_add_tail(&t->th_list, &pktgen_threads); 3660 init_completion(&t->start_done); 3661 3662 p = kthread_create_on_node(pktgen_thread_worker, 3663 t, 3664 cpu_to_node(cpu), 3665 "kpktgend_%d", cpu); 3666 if (IS_ERR(p)) { 3667 pr_err("kernel_thread() failed for cpu %d\n", t->cpu); 3668 list_del(&t->th_list); 3669 kfree(t); 3670 return PTR_ERR(p); 3671 } 3672 kthread_bind(p, cpu); 3673 t->tsk = p; 3674 3675 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir, 3676 &pktgen_thread_fops, t); 3677 if (!pe) { 3678 pr_err("cannot create %s/%s procfs entry\n", 3679 PG_PROC_DIR, t->tsk->comm); 3680 kthread_stop(p); 3681 list_del(&t->th_list); 3682 kfree(t); 3683 return -EINVAL; 3684 } 3685 3686 wake_up_process(p); 3687 wait_for_completion(&t->start_done); 3688 3689 return 0; 3690 } 3691 3692 /* 3693 * Removes a device from the thread if_list. 3694 */ 3695 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3696 struct pktgen_dev *pkt_dev) 3697 { 3698 struct list_head *q, *n; 3699 struct pktgen_dev *p; 3700 3701 list_for_each_safe(q, n, &t->if_list) { 3702 p = list_entry(q, struct pktgen_dev, list); 3703 if (p == pkt_dev) 3704 list_del(&p->list); 3705 } 3706 } 3707 3708 static int pktgen_remove_device(struct pktgen_thread *t, 3709 struct pktgen_dev *pkt_dev) 3710 { 3711 3712 pr_debug("remove_device pkt_dev=%p\n", pkt_dev); 3713 3714 if (pkt_dev->running) { 3715 pr_warning("WARNING: trying to remove a running interface, stopping it now\n"); 3716 pktgen_stop_device(pkt_dev); 3717 } 3718 3719 /* Dis-associate from the interface */ 3720 3721 if (pkt_dev->odev) { 3722 dev_put(pkt_dev->odev); 3723 pkt_dev->odev = NULL; 3724 } 3725 3726 /* And update the thread if_list */ 3727 3728 _rem_dev_from_if_list(t, pkt_dev); 3729 3730 if (pkt_dev->entry) 3731 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 3732 3733 #ifdef CONFIG_XFRM 3734 free_SAs(pkt_dev); 3735 #endif 3736 vfree(pkt_dev->flows); 3737 if (pkt_dev->page) 3738 put_page(pkt_dev->page); 3739 kfree(pkt_dev); 3740 return 0; 3741 } 3742 3743 static int __init pg_init(void) 3744 { 3745 int cpu; 3746 struct proc_dir_entry *pe; 3747 3748 pr_info("%s", version); 3749 3750 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net); 3751 if (!pg_proc_dir) 3752 return -ENODEV; 3753 3754 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops); 3755 if (pe == NULL) { 3756 pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL); 3757 proc_net_remove(&init_net, PG_PROC_DIR); 3758 return -EINVAL; 3759 } 3760 3761 /* Register us to receive netdevice events */ 3762 register_netdevice_notifier(&pktgen_notifier_block); 3763 3764 for_each_online_cpu(cpu) { 3765 int err; 3766 3767 err = pktgen_create_thread(cpu); 3768 if (err) 3769 pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n", 3770 cpu, err); 3771 } 3772 3773 if (list_empty(&pktgen_threads)) { 3774 pr_err("ERROR: Initialization failed for all threads\n"); 3775 unregister_netdevice_notifier(&pktgen_notifier_block); 3776 remove_proc_entry(PGCTRL, pg_proc_dir); 3777 proc_net_remove(&init_net, PG_PROC_DIR); 3778 return -ENODEV; 3779 } 3780 3781 return 0; 3782 } 3783 3784 static void __exit pg_cleanup(void) 3785 { 3786 struct pktgen_thread *t; 3787 struct list_head *q, *n; 3788 3789 /* Stop all interfaces & threads */ 3790 pktgen_exiting = true; 3791 3792 list_for_each_safe(q, n, &pktgen_threads) { 3793 t = list_entry(q, struct pktgen_thread, th_list); 3794 kthread_stop(t->tsk); 3795 kfree(t); 3796 } 3797 3798 /* Un-register us from receiving netdevice events */ 3799 unregister_netdevice_notifier(&pktgen_notifier_block); 3800 3801 /* Clean up proc file system */ 3802 remove_proc_entry(PGCTRL, pg_proc_dir); 3803 proc_net_remove(&init_net, PG_PROC_DIR); 3804 } 3805 3806 module_init(pg_init); 3807 module_exit(pg_cleanup); 3808 3809 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); 3810 MODULE_DESCRIPTION("Packet Generator tool"); 3811 MODULE_LICENSE("GPL"); 3812 MODULE_VERSION(VERSION); 3813 module_param(pg_count_d, int, 0); 3814 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); 3815 module_param(pg_delay_d, int, 0); 3816 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); 3817 module_param(pg_clone_skb_d, int, 0); 3818 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); 3819 module_param(debug, int, 0); 3820 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); 3821