1 /* 2 * Authors: 3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se> 4 * Uppsala University and 5 * Swedish University of Agricultural Sciences 6 * 7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> 8 * Ben Greear <greearb@candelatech.com> 9 * Jens Låås <jens.laas@data.slu.se> 10 * 11 * This program is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License 13 * as published by the Free Software Foundation; either version 14 * 2 of the License, or (at your option) any later version. 15 * 16 * 17 * A tool for loading the network with preconfigurated packets. 18 * The tool is implemented as a linux module. Parameters are output 19 * device, delay (to hard_xmit), number of packets, and whether 20 * to use multiple SKBs or just the same one. 21 * pktgen uses the installed interface's output routine. 22 * 23 * Additional hacking by: 24 * 25 * Jens.Laas@data.slu.se 26 * Improved by ANK. 010120. 27 * Improved by ANK even more. 010212. 28 * MAC address typo fixed. 010417 --ro 29 * Integrated. 020301 --DaveM 30 * Added multiskb option 020301 --DaveM 31 * Scaling of results. 020417--sigurdur@linpro.no 32 * Significant re-work of the module: 33 * * Convert to threaded model to more efficiently be able to transmit 34 * and receive on multiple interfaces at once. 35 * * Converted many counters to __u64 to allow longer runs. 36 * * Allow configuration of ranges, like min/max IP address, MACs, 37 * and UDP-ports, for both source and destination, and can 38 * set to use a random distribution or sequentially walk the range. 39 * * Can now change most values after starting. 40 * * Place 12-byte packet in UDP payload with magic number, 41 * sequence number, and timestamp. 42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and 43 * latencies (with micro-second) precision. 44 * * Add IOCTL interface to easily get counters & configuration. 45 * --Ben Greear <greearb@candelatech.com> 46 * 47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct 48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0 49 * as a "fastpath" with a configurable number of clones after alloc's. 50 * clone_skb=0 means all packets are allocated this also means ranges time 51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100 52 * clones. 53 * 54 * Also moved to /proc/net/pktgen/ 55 * --ro 56 * 57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever 58 * mistakes. Also merged in DaveM's patch in the -pre6 patch. 59 * --Ben Greear <greearb@candelatech.com> 60 * 61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br) 62 * 63 * 64 * 021124 Finished major redesign and rewrite for new functionality. 65 * See Documentation/networking/pktgen.txt for how to use this. 66 * 67 * The new operation: 68 * For each CPU one thread/process is created at start. This process checks 69 * for running devices in the if_list and sends packets until count is 0 it 70 * also the thread checks the thread->control which is used for inter-process 71 * communication. controlling process "posts" operations to the threads this 72 * way. The if_lock should be possible to remove when add/rem_device is merged 73 * into this too. 74 * 75 * By design there should only be *one* "controlling" process. In practice 76 * multiple write accesses gives unpredictable result. Understood by "write" 77 * to /proc gives result code thats should be read be the "writer". 78 * For practical use this should be no problem. 79 * 80 * Note when adding devices to a specific CPU there good idea to also assign 81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU. 82 * --ro 83 * 84 * Fix refcount off by one if first packet fails, potential null deref, 85 * memleak 030710- KJP 86 * 87 * First "ranges" functionality for ipv6 030726 --ro 88 * 89 * Included flow support. 030802 ANK. 90 * 91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org> 92 * 93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419 94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604 95 * 96 * New xmit() return, do_div and misc clean up by Stephen Hemminger 97 * <shemminger@osdl.org> 040923 98 * 99 * Randy Dunlap fixed u64 printk compiler waring 100 * 101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org> 102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213 103 * 104 * Corrections from Nikolai Malykh (nmalykh@bilim.com) 105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230 106 * 107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com> 108 * 050103 109 * 110 * MPLS support by Steven Whitehouse <steve@chygwyn.com> 111 * 112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com> 113 * 114 * Fixed src_mac command to set source mac of packet to value specified in 115 * command by Adit Ranadive <adit.262@gmail.com> 116 * 117 */ 118 119 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 120 121 #include <linux/sys.h> 122 #include <linux/types.h> 123 #include <linux/module.h> 124 #include <linux/moduleparam.h> 125 #include <linux/kernel.h> 126 #include <linux/mutex.h> 127 #include <linux/sched.h> 128 #include <linux/slab.h> 129 #include <linux/vmalloc.h> 130 #include <linux/unistd.h> 131 #include <linux/string.h> 132 #include <linux/ptrace.h> 133 #include <linux/errno.h> 134 #include <linux/ioport.h> 135 #include <linux/interrupt.h> 136 #include <linux/capability.h> 137 #include <linux/hrtimer.h> 138 #include <linux/freezer.h> 139 #include <linux/delay.h> 140 #include <linux/timer.h> 141 #include <linux/list.h> 142 #include <linux/init.h> 143 #include <linux/skbuff.h> 144 #include <linux/netdevice.h> 145 #include <linux/inet.h> 146 #include <linux/inetdevice.h> 147 #include <linux/rtnetlink.h> 148 #include <linux/if_arp.h> 149 #include <linux/if_vlan.h> 150 #include <linux/in.h> 151 #include <linux/ip.h> 152 #include <linux/ipv6.h> 153 #include <linux/udp.h> 154 #include <linux/proc_fs.h> 155 #include <linux/seq_file.h> 156 #include <linux/wait.h> 157 #include <linux/etherdevice.h> 158 #include <linux/kthread.h> 159 #include <linux/prefetch.h> 160 #include <net/net_namespace.h> 161 #include <net/checksum.h> 162 #include <net/ipv6.h> 163 #include <net/addrconf.h> 164 #ifdef CONFIG_XFRM 165 #include <net/xfrm.h> 166 #endif 167 #include <asm/byteorder.h> 168 #include <linux/rcupdate.h> 169 #include <linux/bitops.h> 170 #include <linux/io.h> 171 #include <linux/timex.h> 172 #include <linux/uaccess.h> 173 #include <asm/dma.h> 174 #include <asm/div64.h> /* do_div */ 175 176 #define VERSION "2.74" 177 #define IP_NAME_SZ 32 178 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */ 179 #define MPLS_STACK_BOTTOM htonl(0x00000100) 180 181 #define func_enter() pr_debug("entering %s\n", __func__); 182 183 /* Device flag bits */ 184 #define F_IPSRC_RND (1<<0) /* IP-Src Random */ 185 #define F_IPDST_RND (1<<1) /* IP-Dst Random */ 186 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */ 187 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */ 188 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */ 189 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */ 190 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */ 191 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */ 192 #define F_MPLS_RND (1<<8) /* Random MPLS labels */ 193 #define F_VID_RND (1<<9) /* Random VLAN ID */ 194 #define F_SVID_RND (1<<10) /* Random SVLAN ID */ 195 #define F_FLOW_SEQ (1<<11) /* Sequential flows */ 196 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */ 197 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */ 198 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */ 199 #define F_NODE (1<<15) /* Node memory alloc*/ 200 201 /* Thread control flag bits */ 202 #define T_STOP (1<<0) /* Stop run */ 203 #define T_RUN (1<<1) /* Start run */ 204 #define T_REMDEVALL (1<<2) /* Remove all devs */ 205 #define T_REMDEV (1<<3) /* Remove one dev */ 206 207 /* If lock -- can be removed after some work */ 208 #define if_lock(t) spin_lock(&(t->if_lock)); 209 #define if_unlock(t) spin_unlock(&(t->if_lock)); 210 211 /* Used to help with determining the pkts on receive */ 212 #define PKTGEN_MAGIC 0xbe9be955 213 #define PG_PROC_DIR "pktgen" 214 #define PGCTRL "pgctrl" 215 static struct proc_dir_entry *pg_proc_dir; 216 217 #define MAX_CFLOWS 65536 218 219 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4) 220 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4) 221 222 struct flow_state { 223 __be32 cur_daddr; 224 int count; 225 #ifdef CONFIG_XFRM 226 struct xfrm_state *x; 227 #endif 228 __u32 flags; 229 }; 230 231 /* flow flag bits */ 232 #define F_INIT (1<<0) /* flow has been initialized */ 233 234 struct pktgen_dev { 235 /* 236 * Try to keep frequent/infrequent used vars. separated. 237 */ 238 struct proc_dir_entry *entry; /* proc file */ 239 struct pktgen_thread *pg_thread;/* the owner */ 240 struct list_head list; /* chaining in the thread's run-queue */ 241 242 int running; /* if false, the test will stop */ 243 244 /* If min != max, then we will either do a linear iteration, or 245 * we will do a random selection from within the range. 246 */ 247 __u32 flags; 248 int removal_mark; /* non-zero => the device is marked for 249 * removal by worker thread */ 250 251 int min_pkt_size; /* = ETH_ZLEN; */ 252 int max_pkt_size; /* = ETH_ZLEN; */ 253 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */ 254 int nfrags; 255 struct page *page; 256 u64 delay; /* nano-seconds */ 257 258 __u64 count; /* Default No packets to send */ 259 __u64 sofar; /* How many pkts we've sent so far */ 260 __u64 tx_bytes; /* How many bytes we've transmitted */ 261 __u64 errors; /* Errors when trying to transmit, */ 262 263 /* runtime counters relating to clone_skb */ 264 265 __u64 allocated_skbs; 266 __u32 clone_count; 267 int last_ok; /* Was last skb sent? 268 * Or a failed transmit of some sort? 269 * This will keep sequence numbers in order 270 */ 271 ktime_t next_tx; 272 ktime_t started_at; 273 ktime_t stopped_at; 274 u64 idle_acc; /* nano-seconds */ 275 276 __u32 seq_num; 277 278 int clone_skb; /* 279 * Use multiple SKBs during packet gen. 280 * If this number is greater than 1, then 281 * that many copies of the same packet will be 282 * sent before a new packet is allocated. 283 * If you want to send 1024 identical packets 284 * before creating a new packet, 285 * set clone_skb to 1024. 286 */ 287 288 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 289 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 290 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 291 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ 292 293 struct in6_addr in6_saddr; 294 struct in6_addr in6_daddr; 295 struct in6_addr cur_in6_daddr; 296 struct in6_addr cur_in6_saddr; 297 /* For ranges */ 298 struct in6_addr min_in6_daddr; 299 struct in6_addr max_in6_daddr; 300 struct in6_addr min_in6_saddr; 301 struct in6_addr max_in6_saddr; 302 303 /* If we're doing ranges, random or incremental, then this 304 * defines the min/max for those ranges. 305 */ 306 __be32 saddr_min; /* inclusive, source IP address */ 307 __be32 saddr_max; /* exclusive, source IP address */ 308 __be32 daddr_min; /* inclusive, dest IP address */ 309 __be32 daddr_max; /* exclusive, dest IP address */ 310 311 __u16 udp_src_min; /* inclusive, source UDP port */ 312 __u16 udp_src_max; /* exclusive, source UDP port */ 313 __u16 udp_dst_min; /* inclusive, dest UDP port */ 314 __u16 udp_dst_max; /* exclusive, dest UDP port */ 315 316 /* DSCP + ECN */ 317 __u8 tos; /* six MSB of (former) IPv4 TOS 318 are for dscp codepoint */ 319 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 320 (see RFC 3260, sec. 4) */ 321 322 /* MPLS */ 323 unsigned int nr_labels; /* Depth of stack, 0 = no MPLS */ 324 __be32 labels[MAX_MPLS_LABELS]; 325 326 /* VLAN/SVLAN (802.1Q/Q-in-Q) */ 327 __u8 vlan_p; 328 __u8 vlan_cfi; 329 __u16 vlan_id; /* 0xffff means no vlan tag */ 330 331 __u8 svlan_p; 332 __u8 svlan_cfi; 333 __u16 svlan_id; /* 0xffff means no svlan tag */ 334 335 __u32 src_mac_count; /* How many MACs to iterate through */ 336 __u32 dst_mac_count; /* How many MACs to iterate through */ 337 338 unsigned char dst_mac[ETH_ALEN]; 339 unsigned char src_mac[ETH_ALEN]; 340 341 __u32 cur_dst_mac_offset; 342 __u32 cur_src_mac_offset; 343 __be32 cur_saddr; 344 __be32 cur_daddr; 345 __u16 ip_id; 346 __u16 cur_udp_dst; 347 __u16 cur_udp_src; 348 __u16 cur_queue_map; 349 __u32 cur_pkt_size; 350 __u32 last_pkt_size; 351 352 __u8 hh[14]; 353 /* = { 354 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, 355 356 We fill in SRC address later 357 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 358 0x08, 0x00 359 }; 360 */ 361 __u16 pad; /* pad out the hh struct to an even 16 bytes */ 362 363 struct sk_buff *skb; /* skb we are to transmit next, used for when we 364 * are transmitting the same one multiple times 365 */ 366 struct net_device *odev; /* The out-going device. 367 * Note that the device should have it's 368 * pg_info pointer pointing back to this 369 * device. 370 * Set when the user specifies the out-going 371 * device name (not when the inject is 372 * started as it used to do.) 373 */ 374 char odevname[32]; 375 struct flow_state *flows; 376 unsigned int cflows; /* Concurrent flows (config) */ 377 unsigned int lflow; /* Flow length (config) */ 378 unsigned int nflows; /* accumulated flows (stats) */ 379 unsigned int curfl; /* current sequenced flow (state)*/ 380 381 u16 queue_map_min; 382 u16 queue_map_max; 383 __u32 skb_priority; /* skb priority field */ 384 int node; /* Memory node */ 385 386 #ifdef CONFIG_XFRM 387 __u8 ipsmode; /* IPSEC mode (config) */ 388 __u8 ipsproto; /* IPSEC type (config) */ 389 #endif 390 char result[512]; 391 }; 392 393 struct pktgen_hdr { 394 __be32 pgh_magic; 395 __be32 seq_num; 396 __be32 tv_sec; 397 __be32 tv_usec; 398 }; 399 400 static bool pktgen_exiting __read_mostly; 401 402 struct pktgen_thread { 403 spinlock_t if_lock; /* for list of devices */ 404 struct list_head if_list; /* All device here */ 405 struct list_head th_list; 406 struct task_struct *tsk; 407 char result[512]; 408 409 /* Field for thread to receive "posted" events terminate, 410 stop ifs etc. */ 411 412 u32 control; 413 int cpu; 414 415 wait_queue_head_t queue; 416 struct completion start_done; 417 }; 418 419 #define REMOVE 1 420 #define FIND 0 421 422 static inline ktime_t ktime_now(void) 423 { 424 struct timespec ts; 425 ktime_get_ts(&ts); 426 427 return timespec_to_ktime(ts); 428 } 429 430 /* This works even if 32 bit because of careful byte order choice */ 431 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2) 432 { 433 return cmp1.tv64 < cmp2.tv64; 434 } 435 436 static const char version[] = 437 "Packet Generator for packet performance testing. " 438 "Version: " VERSION "\n"; 439 440 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i); 441 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname); 442 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 443 const char *ifname, bool exact); 444 static int pktgen_device_event(struct notifier_block *, unsigned long, void *); 445 static void pktgen_run_all_threads(void); 446 static void pktgen_reset_all_threads(void); 447 static void pktgen_stop_all_threads_ifs(void); 448 449 static void pktgen_stop(struct pktgen_thread *t); 450 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); 451 452 static unsigned int scan_ip6(const char *s, char ip[16]); 453 454 /* Module parameters, defaults. */ 455 static int pg_count_d __read_mostly = 1000; 456 static int pg_delay_d __read_mostly; 457 static int pg_clone_skb_d __read_mostly; 458 static int debug __read_mostly; 459 460 static DEFINE_MUTEX(pktgen_thread_lock); 461 static LIST_HEAD(pktgen_threads); 462 463 static struct notifier_block pktgen_notifier_block = { 464 .notifier_call = pktgen_device_event, 465 }; 466 467 /* 468 * /proc handling functions 469 * 470 */ 471 472 static int pgctrl_show(struct seq_file *seq, void *v) 473 { 474 seq_puts(seq, version); 475 return 0; 476 } 477 478 static ssize_t pgctrl_write(struct file *file, const char __user *buf, 479 size_t count, loff_t *ppos) 480 { 481 int err = 0; 482 char data[128]; 483 484 if (!capable(CAP_NET_ADMIN)) { 485 err = -EPERM; 486 goto out; 487 } 488 489 if (count > sizeof(data)) 490 count = sizeof(data); 491 492 if (copy_from_user(data, buf, count)) { 493 err = -EFAULT; 494 goto out; 495 } 496 data[count - 1] = 0; /* Make string */ 497 498 if (!strcmp(data, "stop")) 499 pktgen_stop_all_threads_ifs(); 500 501 else if (!strcmp(data, "start")) 502 pktgen_run_all_threads(); 503 504 else if (!strcmp(data, "reset")) 505 pktgen_reset_all_threads(); 506 507 else 508 pr_warning("Unknown command: %s\n", data); 509 510 err = count; 511 512 out: 513 return err; 514 } 515 516 static int pgctrl_open(struct inode *inode, struct file *file) 517 { 518 return single_open(file, pgctrl_show, PDE(inode)->data); 519 } 520 521 static const struct file_operations pktgen_fops = { 522 .owner = THIS_MODULE, 523 .open = pgctrl_open, 524 .read = seq_read, 525 .llseek = seq_lseek, 526 .write = pgctrl_write, 527 .release = single_release, 528 }; 529 530 static int pktgen_if_show(struct seq_file *seq, void *v) 531 { 532 const struct pktgen_dev *pkt_dev = seq->private; 533 ktime_t stopped; 534 u64 idle; 535 536 seq_printf(seq, 537 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", 538 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, 539 pkt_dev->max_pkt_size); 540 541 seq_printf(seq, 542 " frags: %d delay: %llu clone_skb: %d ifname: %s\n", 543 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay, 544 pkt_dev->clone_skb, pkt_dev->odevname); 545 546 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, 547 pkt_dev->lflow); 548 549 seq_printf(seq, 550 " queue_map_min: %u queue_map_max: %u\n", 551 pkt_dev->queue_map_min, 552 pkt_dev->queue_map_max); 553 554 if (pkt_dev->skb_priority) 555 seq_printf(seq, " skb_priority: %u\n", 556 pkt_dev->skb_priority); 557 558 if (pkt_dev->flags & F_IPV6) { 559 seq_printf(seq, 560 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n" 561 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n", 562 &pkt_dev->in6_saddr, 563 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr, 564 &pkt_dev->in6_daddr, 565 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr); 566 } else { 567 seq_printf(seq, 568 " dst_min: %s dst_max: %s\n", 569 pkt_dev->dst_min, pkt_dev->dst_max); 570 seq_printf(seq, 571 " src_min: %s src_max: %s\n", 572 pkt_dev->src_min, pkt_dev->src_max); 573 } 574 575 seq_puts(seq, " src_mac: "); 576 577 seq_printf(seq, "%pM ", 578 is_zero_ether_addr(pkt_dev->src_mac) ? 579 pkt_dev->odev->dev_addr : pkt_dev->src_mac); 580 581 seq_printf(seq, "dst_mac: "); 582 seq_printf(seq, "%pM\n", pkt_dev->dst_mac); 583 584 seq_printf(seq, 585 " udp_src_min: %d udp_src_max: %d" 586 " udp_dst_min: %d udp_dst_max: %d\n", 587 pkt_dev->udp_src_min, pkt_dev->udp_src_max, 588 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); 589 590 seq_printf(seq, 591 " src_mac_count: %d dst_mac_count: %d\n", 592 pkt_dev->src_mac_count, pkt_dev->dst_mac_count); 593 594 if (pkt_dev->nr_labels) { 595 unsigned int i; 596 seq_printf(seq, " mpls: "); 597 for (i = 0; i < pkt_dev->nr_labels; i++) 598 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), 599 i == pkt_dev->nr_labels-1 ? "\n" : ", "); 600 } 601 602 if (pkt_dev->vlan_id != 0xffff) 603 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", 604 pkt_dev->vlan_id, pkt_dev->vlan_p, 605 pkt_dev->vlan_cfi); 606 607 if (pkt_dev->svlan_id != 0xffff) 608 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", 609 pkt_dev->svlan_id, pkt_dev->svlan_p, 610 pkt_dev->svlan_cfi); 611 612 if (pkt_dev->tos) 613 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); 614 615 if (pkt_dev->traffic_class) 616 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); 617 618 if (pkt_dev->node >= 0) 619 seq_printf(seq, " node: %d\n", pkt_dev->node); 620 621 seq_printf(seq, " Flags: "); 622 623 if (pkt_dev->flags & F_IPV6) 624 seq_printf(seq, "IPV6 "); 625 626 if (pkt_dev->flags & F_IPSRC_RND) 627 seq_printf(seq, "IPSRC_RND "); 628 629 if (pkt_dev->flags & F_IPDST_RND) 630 seq_printf(seq, "IPDST_RND "); 631 632 if (pkt_dev->flags & F_TXSIZE_RND) 633 seq_printf(seq, "TXSIZE_RND "); 634 635 if (pkt_dev->flags & F_UDPSRC_RND) 636 seq_printf(seq, "UDPSRC_RND "); 637 638 if (pkt_dev->flags & F_UDPDST_RND) 639 seq_printf(seq, "UDPDST_RND "); 640 641 if (pkt_dev->flags & F_MPLS_RND) 642 seq_printf(seq, "MPLS_RND "); 643 644 if (pkt_dev->flags & F_QUEUE_MAP_RND) 645 seq_printf(seq, "QUEUE_MAP_RND "); 646 647 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 648 seq_printf(seq, "QUEUE_MAP_CPU "); 649 650 if (pkt_dev->cflows) { 651 if (pkt_dev->flags & F_FLOW_SEQ) 652 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/ 653 else 654 seq_printf(seq, "FLOW_RND "); 655 } 656 657 #ifdef CONFIG_XFRM 658 if (pkt_dev->flags & F_IPSEC_ON) 659 seq_printf(seq, "IPSEC "); 660 #endif 661 662 if (pkt_dev->flags & F_MACSRC_RND) 663 seq_printf(seq, "MACSRC_RND "); 664 665 if (pkt_dev->flags & F_MACDST_RND) 666 seq_printf(seq, "MACDST_RND "); 667 668 if (pkt_dev->flags & F_VID_RND) 669 seq_printf(seq, "VID_RND "); 670 671 if (pkt_dev->flags & F_SVID_RND) 672 seq_printf(seq, "SVID_RND "); 673 674 if (pkt_dev->flags & F_NODE) 675 seq_printf(seq, "NODE_ALLOC "); 676 677 seq_puts(seq, "\n"); 678 679 /* not really stopped, more like last-running-at */ 680 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at; 681 idle = pkt_dev->idle_acc; 682 do_div(idle, NSEC_PER_USEC); 683 684 seq_printf(seq, 685 "Current:\n pkts-sofar: %llu errors: %llu\n", 686 (unsigned long long)pkt_dev->sofar, 687 (unsigned long long)pkt_dev->errors); 688 689 seq_printf(seq, 690 " started: %lluus stopped: %lluus idle: %lluus\n", 691 (unsigned long long) ktime_to_us(pkt_dev->started_at), 692 (unsigned long long) ktime_to_us(stopped), 693 (unsigned long long) idle); 694 695 seq_printf(seq, 696 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 697 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, 698 pkt_dev->cur_src_mac_offset); 699 700 if (pkt_dev->flags & F_IPV6) { 701 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n", 702 &pkt_dev->cur_in6_saddr, 703 &pkt_dev->cur_in6_daddr); 704 } else 705 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n", 706 pkt_dev->cur_saddr, pkt_dev->cur_daddr); 707 708 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", 709 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 710 711 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); 712 713 seq_printf(seq, " flows: %u\n", pkt_dev->nflows); 714 715 if (pkt_dev->result[0]) 716 seq_printf(seq, "Result: %s\n", pkt_dev->result); 717 else 718 seq_printf(seq, "Result: Idle\n"); 719 720 return 0; 721 } 722 723 724 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, 725 __u32 *num) 726 { 727 int i = 0; 728 *num = 0; 729 730 for (; i < maxlen; i++) { 731 int value; 732 char c; 733 *num <<= 4; 734 if (get_user(c, &user_buffer[i])) 735 return -EFAULT; 736 value = hex_to_bin(c); 737 if (value >= 0) 738 *num |= value; 739 else 740 break; 741 } 742 return i; 743 } 744 745 static int count_trail_chars(const char __user * user_buffer, 746 unsigned int maxlen) 747 { 748 int i; 749 750 for (i = 0; i < maxlen; i++) { 751 char c; 752 if (get_user(c, &user_buffer[i])) 753 return -EFAULT; 754 switch (c) { 755 case '\"': 756 case '\n': 757 case '\r': 758 case '\t': 759 case ' ': 760 case '=': 761 break; 762 default: 763 goto done; 764 } 765 } 766 done: 767 return i; 768 } 769 770 static long num_arg(const char __user *user_buffer, unsigned long maxlen, 771 unsigned long *num) 772 { 773 int i; 774 *num = 0; 775 776 for (i = 0; i < maxlen; i++) { 777 char c; 778 if (get_user(c, &user_buffer[i])) 779 return -EFAULT; 780 if ((c >= '0') && (c <= '9')) { 781 *num *= 10; 782 *num += c - '0'; 783 } else 784 break; 785 } 786 return i; 787 } 788 789 static int strn_len(const char __user * user_buffer, unsigned int maxlen) 790 { 791 int i; 792 793 for (i = 0; i < maxlen; i++) { 794 char c; 795 if (get_user(c, &user_buffer[i])) 796 return -EFAULT; 797 switch (c) { 798 case '\"': 799 case '\n': 800 case '\r': 801 case '\t': 802 case ' ': 803 goto done_str; 804 break; 805 default: 806 break; 807 } 808 } 809 done_str: 810 return i; 811 } 812 813 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) 814 { 815 unsigned int n = 0; 816 char c; 817 ssize_t i = 0; 818 int len; 819 820 pkt_dev->nr_labels = 0; 821 do { 822 __u32 tmp; 823 len = hex32_arg(&buffer[i], 8, &tmp); 824 if (len <= 0) 825 return len; 826 pkt_dev->labels[n] = htonl(tmp); 827 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 828 pkt_dev->flags |= F_MPLS_RND; 829 i += len; 830 if (get_user(c, &buffer[i])) 831 return -EFAULT; 832 i++; 833 n++; 834 if (n >= MAX_MPLS_LABELS) 835 return -E2BIG; 836 } while (c == ','); 837 838 pkt_dev->nr_labels = n; 839 return i; 840 } 841 842 static ssize_t pktgen_if_write(struct file *file, 843 const char __user * user_buffer, size_t count, 844 loff_t * offset) 845 { 846 struct seq_file *seq = file->private_data; 847 struct pktgen_dev *pkt_dev = seq->private; 848 int i, max, len; 849 char name[16], valstr[32]; 850 unsigned long value = 0; 851 char *pg_result = NULL; 852 int tmp = 0; 853 char buf[128]; 854 855 pg_result = &(pkt_dev->result[0]); 856 857 if (count < 1) { 858 pr_warning("wrong command format\n"); 859 return -EINVAL; 860 } 861 862 max = count; 863 tmp = count_trail_chars(user_buffer, max); 864 if (tmp < 0) { 865 pr_warning("illegal format\n"); 866 return tmp; 867 } 868 i = tmp; 869 870 /* Read variable name */ 871 872 len = strn_len(&user_buffer[i], sizeof(name) - 1); 873 if (len < 0) 874 return len; 875 876 memset(name, 0, sizeof(name)); 877 if (copy_from_user(name, &user_buffer[i], len)) 878 return -EFAULT; 879 i += len; 880 881 max = count - i; 882 len = count_trail_chars(&user_buffer[i], max); 883 if (len < 0) 884 return len; 885 886 i += len; 887 888 if (debug) { 889 size_t copy = min_t(size_t, count, 1023); 890 char tb[copy + 1]; 891 if (copy_from_user(tb, user_buffer, copy)) 892 return -EFAULT; 893 tb[copy] = 0; 894 pr_debug("%s,%lu buffer -:%s:-\n", 895 name, (unsigned long)count, tb); 896 } 897 898 if (!strcmp(name, "min_pkt_size")) { 899 len = num_arg(&user_buffer[i], 10, &value); 900 if (len < 0) 901 return len; 902 903 i += len; 904 if (value < 14 + 20 + 8) 905 value = 14 + 20 + 8; 906 if (value != pkt_dev->min_pkt_size) { 907 pkt_dev->min_pkt_size = value; 908 pkt_dev->cur_pkt_size = value; 909 } 910 sprintf(pg_result, "OK: min_pkt_size=%u", 911 pkt_dev->min_pkt_size); 912 return count; 913 } 914 915 if (!strcmp(name, "max_pkt_size")) { 916 len = num_arg(&user_buffer[i], 10, &value); 917 if (len < 0) 918 return len; 919 920 i += len; 921 if (value < 14 + 20 + 8) 922 value = 14 + 20 + 8; 923 if (value != pkt_dev->max_pkt_size) { 924 pkt_dev->max_pkt_size = value; 925 pkt_dev->cur_pkt_size = value; 926 } 927 sprintf(pg_result, "OK: max_pkt_size=%u", 928 pkt_dev->max_pkt_size); 929 return count; 930 } 931 932 /* Shortcut for min = max */ 933 934 if (!strcmp(name, "pkt_size")) { 935 len = num_arg(&user_buffer[i], 10, &value); 936 if (len < 0) 937 return len; 938 939 i += len; 940 if (value < 14 + 20 + 8) 941 value = 14 + 20 + 8; 942 if (value != pkt_dev->min_pkt_size) { 943 pkt_dev->min_pkt_size = value; 944 pkt_dev->max_pkt_size = value; 945 pkt_dev->cur_pkt_size = value; 946 } 947 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 948 return count; 949 } 950 951 if (!strcmp(name, "debug")) { 952 len = num_arg(&user_buffer[i], 10, &value); 953 if (len < 0) 954 return len; 955 956 i += len; 957 debug = value; 958 sprintf(pg_result, "OK: debug=%u", debug); 959 return count; 960 } 961 962 if (!strcmp(name, "frags")) { 963 len = num_arg(&user_buffer[i], 10, &value); 964 if (len < 0) 965 return len; 966 967 i += len; 968 pkt_dev->nfrags = value; 969 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 970 return count; 971 } 972 if (!strcmp(name, "delay")) { 973 len = num_arg(&user_buffer[i], 10, &value); 974 if (len < 0) 975 return len; 976 977 i += len; 978 if (value == 0x7FFFFFFF) 979 pkt_dev->delay = ULLONG_MAX; 980 else 981 pkt_dev->delay = (u64)value; 982 983 sprintf(pg_result, "OK: delay=%llu", 984 (unsigned long long) pkt_dev->delay); 985 return count; 986 } 987 if (!strcmp(name, "rate")) { 988 len = num_arg(&user_buffer[i], 10, &value); 989 if (len < 0) 990 return len; 991 992 i += len; 993 if (!value) 994 return len; 995 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value; 996 if (debug) 997 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 998 999 sprintf(pg_result, "OK: rate=%lu", value); 1000 return count; 1001 } 1002 if (!strcmp(name, "ratep")) { 1003 len = num_arg(&user_buffer[i], 10, &value); 1004 if (len < 0) 1005 return len; 1006 1007 i += len; 1008 if (!value) 1009 return len; 1010 pkt_dev->delay = NSEC_PER_SEC/value; 1011 if (debug) 1012 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 1013 1014 sprintf(pg_result, "OK: rate=%lu", value); 1015 return count; 1016 } 1017 if (!strcmp(name, "udp_src_min")) { 1018 len = num_arg(&user_buffer[i], 10, &value); 1019 if (len < 0) 1020 return len; 1021 1022 i += len; 1023 if (value != pkt_dev->udp_src_min) { 1024 pkt_dev->udp_src_min = value; 1025 pkt_dev->cur_udp_src = value; 1026 } 1027 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 1028 return count; 1029 } 1030 if (!strcmp(name, "udp_dst_min")) { 1031 len = num_arg(&user_buffer[i], 10, &value); 1032 if (len < 0) 1033 return len; 1034 1035 i += len; 1036 if (value != pkt_dev->udp_dst_min) { 1037 pkt_dev->udp_dst_min = value; 1038 pkt_dev->cur_udp_dst = value; 1039 } 1040 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 1041 return count; 1042 } 1043 if (!strcmp(name, "udp_src_max")) { 1044 len = num_arg(&user_buffer[i], 10, &value); 1045 if (len < 0) 1046 return len; 1047 1048 i += len; 1049 if (value != pkt_dev->udp_src_max) { 1050 pkt_dev->udp_src_max = value; 1051 pkt_dev->cur_udp_src = value; 1052 } 1053 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 1054 return count; 1055 } 1056 if (!strcmp(name, "udp_dst_max")) { 1057 len = num_arg(&user_buffer[i], 10, &value); 1058 if (len < 0) 1059 return len; 1060 1061 i += len; 1062 if (value != pkt_dev->udp_dst_max) { 1063 pkt_dev->udp_dst_max = value; 1064 pkt_dev->cur_udp_dst = value; 1065 } 1066 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1067 return count; 1068 } 1069 if (!strcmp(name, "clone_skb")) { 1070 len = num_arg(&user_buffer[i], 10, &value); 1071 if (len < 0) 1072 return len; 1073 if ((value > 0) && 1074 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING))) 1075 return -ENOTSUPP; 1076 i += len; 1077 pkt_dev->clone_skb = value; 1078 1079 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1080 return count; 1081 } 1082 if (!strcmp(name, "count")) { 1083 len = num_arg(&user_buffer[i], 10, &value); 1084 if (len < 0) 1085 return len; 1086 1087 i += len; 1088 pkt_dev->count = value; 1089 sprintf(pg_result, "OK: count=%llu", 1090 (unsigned long long)pkt_dev->count); 1091 return count; 1092 } 1093 if (!strcmp(name, "src_mac_count")) { 1094 len = num_arg(&user_buffer[i], 10, &value); 1095 if (len < 0) 1096 return len; 1097 1098 i += len; 1099 if (pkt_dev->src_mac_count != value) { 1100 pkt_dev->src_mac_count = value; 1101 pkt_dev->cur_src_mac_offset = 0; 1102 } 1103 sprintf(pg_result, "OK: src_mac_count=%d", 1104 pkt_dev->src_mac_count); 1105 return count; 1106 } 1107 if (!strcmp(name, "dst_mac_count")) { 1108 len = num_arg(&user_buffer[i], 10, &value); 1109 if (len < 0) 1110 return len; 1111 1112 i += len; 1113 if (pkt_dev->dst_mac_count != value) { 1114 pkt_dev->dst_mac_count = value; 1115 pkt_dev->cur_dst_mac_offset = 0; 1116 } 1117 sprintf(pg_result, "OK: dst_mac_count=%d", 1118 pkt_dev->dst_mac_count); 1119 return count; 1120 } 1121 if (!strcmp(name, "node")) { 1122 len = num_arg(&user_buffer[i], 10, &value); 1123 if (len < 0) 1124 return len; 1125 1126 i += len; 1127 1128 if (node_possible(value)) { 1129 pkt_dev->node = value; 1130 sprintf(pg_result, "OK: node=%d", pkt_dev->node); 1131 if (pkt_dev->page) { 1132 put_page(pkt_dev->page); 1133 pkt_dev->page = NULL; 1134 } 1135 } 1136 else 1137 sprintf(pg_result, "ERROR: node not possible"); 1138 return count; 1139 } 1140 if (!strcmp(name, "flag")) { 1141 char f[32]; 1142 memset(f, 0, 32); 1143 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1144 if (len < 0) 1145 return len; 1146 1147 if (copy_from_user(f, &user_buffer[i], len)) 1148 return -EFAULT; 1149 i += len; 1150 if (strcmp(f, "IPSRC_RND") == 0) 1151 pkt_dev->flags |= F_IPSRC_RND; 1152 1153 else if (strcmp(f, "!IPSRC_RND") == 0) 1154 pkt_dev->flags &= ~F_IPSRC_RND; 1155 1156 else if (strcmp(f, "TXSIZE_RND") == 0) 1157 pkt_dev->flags |= F_TXSIZE_RND; 1158 1159 else if (strcmp(f, "!TXSIZE_RND") == 0) 1160 pkt_dev->flags &= ~F_TXSIZE_RND; 1161 1162 else if (strcmp(f, "IPDST_RND") == 0) 1163 pkt_dev->flags |= F_IPDST_RND; 1164 1165 else if (strcmp(f, "!IPDST_RND") == 0) 1166 pkt_dev->flags &= ~F_IPDST_RND; 1167 1168 else if (strcmp(f, "UDPSRC_RND") == 0) 1169 pkt_dev->flags |= F_UDPSRC_RND; 1170 1171 else if (strcmp(f, "!UDPSRC_RND") == 0) 1172 pkt_dev->flags &= ~F_UDPSRC_RND; 1173 1174 else if (strcmp(f, "UDPDST_RND") == 0) 1175 pkt_dev->flags |= F_UDPDST_RND; 1176 1177 else if (strcmp(f, "!UDPDST_RND") == 0) 1178 pkt_dev->flags &= ~F_UDPDST_RND; 1179 1180 else if (strcmp(f, "MACSRC_RND") == 0) 1181 pkt_dev->flags |= F_MACSRC_RND; 1182 1183 else if (strcmp(f, "!MACSRC_RND") == 0) 1184 pkt_dev->flags &= ~F_MACSRC_RND; 1185 1186 else if (strcmp(f, "MACDST_RND") == 0) 1187 pkt_dev->flags |= F_MACDST_RND; 1188 1189 else if (strcmp(f, "!MACDST_RND") == 0) 1190 pkt_dev->flags &= ~F_MACDST_RND; 1191 1192 else if (strcmp(f, "MPLS_RND") == 0) 1193 pkt_dev->flags |= F_MPLS_RND; 1194 1195 else if (strcmp(f, "!MPLS_RND") == 0) 1196 pkt_dev->flags &= ~F_MPLS_RND; 1197 1198 else if (strcmp(f, "VID_RND") == 0) 1199 pkt_dev->flags |= F_VID_RND; 1200 1201 else if (strcmp(f, "!VID_RND") == 0) 1202 pkt_dev->flags &= ~F_VID_RND; 1203 1204 else if (strcmp(f, "SVID_RND") == 0) 1205 pkt_dev->flags |= F_SVID_RND; 1206 1207 else if (strcmp(f, "!SVID_RND") == 0) 1208 pkt_dev->flags &= ~F_SVID_RND; 1209 1210 else if (strcmp(f, "FLOW_SEQ") == 0) 1211 pkt_dev->flags |= F_FLOW_SEQ; 1212 1213 else if (strcmp(f, "QUEUE_MAP_RND") == 0) 1214 pkt_dev->flags |= F_QUEUE_MAP_RND; 1215 1216 else if (strcmp(f, "!QUEUE_MAP_RND") == 0) 1217 pkt_dev->flags &= ~F_QUEUE_MAP_RND; 1218 1219 else if (strcmp(f, "QUEUE_MAP_CPU") == 0) 1220 pkt_dev->flags |= F_QUEUE_MAP_CPU; 1221 1222 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0) 1223 pkt_dev->flags &= ~F_QUEUE_MAP_CPU; 1224 #ifdef CONFIG_XFRM 1225 else if (strcmp(f, "IPSEC") == 0) 1226 pkt_dev->flags |= F_IPSEC_ON; 1227 #endif 1228 1229 else if (strcmp(f, "!IPV6") == 0) 1230 pkt_dev->flags &= ~F_IPV6; 1231 1232 else if (strcmp(f, "NODE_ALLOC") == 0) 1233 pkt_dev->flags |= F_NODE; 1234 1235 else if (strcmp(f, "!NODE_ALLOC") == 0) 1236 pkt_dev->flags &= ~F_NODE; 1237 1238 else { 1239 sprintf(pg_result, 1240 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1241 f, 1242 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1243 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n"); 1244 return count; 1245 } 1246 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1247 return count; 1248 } 1249 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1250 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1251 if (len < 0) 1252 return len; 1253 1254 if (copy_from_user(buf, &user_buffer[i], len)) 1255 return -EFAULT; 1256 buf[len] = 0; 1257 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1258 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1259 strncpy(pkt_dev->dst_min, buf, len); 1260 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1261 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1262 } 1263 if (debug) 1264 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min); 1265 i += len; 1266 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1267 return count; 1268 } 1269 if (!strcmp(name, "dst_max")) { 1270 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1271 if (len < 0) 1272 return len; 1273 1274 1275 if (copy_from_user(buf, &user_buffer[i], len)) 1276 return -EFAULT; 1277 1278 buf[len] = 0; 1279 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1280 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1281 strncpy(pkt_dev->dst_max, buf, len); 1282 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1283 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1284 } 1285 if (debug) 1286 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max); 1287 i += len; 1288 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1289 return count; 1290 } 1291 if (!strcmp(name, "dst6")) { 1292 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1293 if (len < 0) 1294 return len; 1295 1296 pkt_dev->flags |= F_IPV6; 1297 1298 if (copy_from_user(buf, &user_buffer[i], len)) 1299 return -EFAULT; 1300 buf[len] = 0; 1301 1302 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr); 1303 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr); 1304 1305 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr; 1306 1307 if (debug) 1308 pr_debug("dst6 set to: %s\n", buf); 1309 1310 i += len; 1311 sprintf(pg_result, "OK: dst6=%s", buf); 1312 return count; 1313 } 1314 if (!strcmp(name, "dst6_min")) { 1315 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1316 if (len < 0) 1317 return len; 1318 1319 pkt_dev->flags |= F_IPV6; 1320 1321 if (copy_from_user(buf, &user_buffer[i], len)) 1322 return -EFAULT; 1323 buf[len] = 0; 1324 1325 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); 1326 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr); 1327 1328 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr; 1329 if (debug) 1330 pr_debug("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 pr_debug("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 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr; 1372 1373 if (debug) 1374 pr_debug("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 pr_debug("src_min set to: %s\n", pkt_dev->src_min); 1396 i += len; 1397 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1398 return count; 1399 } 1400 if (!strcmp(name, "src_max")) { 1401 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1402 if (len < 0) 1403 return len; 1404 1405 if (copy_from_user(buf, &user_buffer[i], len)) 1406 return -EFAULT; 1407 buf[len] = 0; 1408 if (strcmp(buf, pkt_dev->src_max) != 0) { 1409 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1410 strncpy(pkt_dev->src_max, buf, len); 1411 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1412 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1413 } 1414 if (debug) 1415 pr_debug("src_max set to: %s\n", pkt_dev->src_max); 1416 i += len; 1417 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1418 return count; 1419 } 1420 if (!strcmp(name, "dst_mac")) { 1421 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1422 if (len < 0) 1423 return len; 1424 1425 memset(valstr, 0, sizeof(valstr)); 1426 if (copy_from_user(valstr, &user_buffer[i], len)) 1427 return -EFAULT; 1428 1429 if (!mac_pton(valstr, pkt_dev->dst_mac)) 1430 return -EINVAL; 1431 /* Set up Dest MAC */ 1432 memcpy(&pkt_dev->hh[0], pkt_dev->dst_mac, ETH_ALEN); 1433 1434 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac); 1435 return count; 1436 } 1437 if (!strcmp(name, "src_mac")) { 1438 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1439 if (len < 0) 1440 return len; 1441 1442 memset(valstr, 0, sizeof(valstr)); 1443 if (copy_from_user(valstr, &user_buffer[i], len)) 1444 return -EFAULT; 1445 1446 if (!mac_pton(valstr, pkt_dev->src_mac)) 1447 return -EINVAL; 1448 /* Set up Src MAC */ 1449 memcpy(&pkt_dev->hh[6], pkt_dev->src_mac, ETH_ALEN); 1450 1451 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac); 1452 return count; 1453 } 1454 1455 if (!strcmp(name, "clear_counters")) { 1456 pktgen_clear_counters(pkt_dev); 1457 sprintf(pg_result, "OK: Clearing counters.\n"); 1458 return count; 1459 } 1460 1461 if (!strcmp(name, "flows")) { 1462 len = num_arg(&user_buffer[i], 10, &value); 1463 if (len < 0) 1464 return len; 1465 1466 i += len; 1467 if (value > MAX_CFLOWS) 1468 value = MAX_CFLOWS; 1469 1470 pkt_dev->cflows = value; 1471 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1472 return count; 1473 } 1474 1475 if (!strcmp(name, "flowlen")) { 1476 len = num_arg(&user_buffer[i], 10, &value); 1477 if (len < 0) 1478 return len; 1479 1480 i += len; 1481 pkt_dev->lflow = value; 1482 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1483 return count; 1484 } 1485 1486 if (!strcmp(name, "queue_map_min")) { 1487 len = num_arg(&user_buffer[i], 5, &value); 1488 if (len < 0) 1489 return len; 1490 1491 i += len; 1492 pkt_dev->queue_map_min = value; 1493 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1494 return count; 1495 } 1496 1497 if (!strcmp(name, "queue_map_max")) { 1498 len = num_arg(&user_buffer[i], 5, &value); 1499 if (len < 0) 1500 return len; 1501 1502 i += len; 1503 pkt_dev->queue_map_max = value; 1504 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1505 return count; 1506 } 1507 1508 if (!strcmp(name, "mpls")) { 1509 unsigned int n, cnt; 1510 1511 len = get_labels(&user_buffer[i], pkt_dev); 1512 if (len < 0) 1513 return len; 1514 i += len; 1515 cnt = sprintf(pg_result, "OK: mpls="); 1516 for (n = 0; n < pkt_dev->nr_labels; n++) 1517 cnt += sprintf(pg_result + cnt, 1518 "%08x%s", ntohl(pkt_dev->labels[n]), 1519 n == pkt_dev->nr_labels-1 ? "" : ","); 1520 1521 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1522 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1523 pkt_dev->svlan_id = 0xffff; 1524 1525 if (debug) 1526 pr_debug("VLAN/SVLAN auto turned off\n"); 1527 } 1528 return count; 1529 } 1530 1531 if (!strcmp(name, "vlan_id")) { 1532 len = num_arg(&user_buffer[i], 4, &value); 1533 if (len < 0) 1534 return len; 1535 1536 i += len; 1537 if (value <= 4095) { 1538 pkt_dev->vlan_id = value; /* turn on VLAN */ 1539 1540 if (debug) 1541 pr_debug("VLAN turned on\n"); 1542 1543 if (debug && pkt_dev->nr_labels) 1544 pr_debug("MPLS auto turned off\n"); 1545 1546 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1547 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1548 } else { 1549 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1550 pkt_dev->svlan_id = 0xffff; 1551 1552 if (debug) 1553 pr_debug("VLAN/SVLAN turned off\n"); 1554 } 1555 return count; 1556 } 1557 1558 if (!strcmp(name, "vlan_p")) { 1559 len = num_arg(&user_buffer[i], 1, &value); 1560 if (len < 0) 1561 return len; 1562 1563 i += len; 1564 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1565 pkt_dev->vlan_p = value; 1566 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1567 } else { 1568 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1569 } 1570 return count; 1571 } 1572 1573 if (!strcmp(name, "vlan_cfi")) { 1574 len = num_arg(&user_buffer[i], 1, &value); 1575 if (len < 0) 1576 return len; 1577 1578 i += len; 1579 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1580 pkt_dev->vlan_cfi = value; 1581 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1582 } else { 1583 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1584 } 1585 return count; 1586 } 1587 1588 if (!strcmp(name, "svlan_id")) { 1589 len = num_arg(&user_buffer[i], 4, &value); 1590 if (len < 0) 1591 return len; 1592 1593 i += len; 1594 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1595 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1596 1597 if (debug) 1598 pr_debug("SVLAN turned on\n"); 1599 1600 if (debug && pkt_dev->nr_labels) 1601 pr_debug("MPLS auto turned off\n"); 1602 1603 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1604 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1605 } else { 1606 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1607 pkt_dev->svlan_id = 0xffff; 1608 1609 if (debug) 1610 pr_debug("VLAN/SVLAN turned off\n"); 1611 } 1612 return count; 1613 } 1614 1615 if (!strcmp(name, "svlan_p")) { 1616 len = num_arg(&user_buffer[i], 1, &value); 1617 if (len < 0) 1618 return len; 1619 1620 i += len; 1621 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1622 pkt_dev->svlan_p = value; 1623 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1624 } else { 1625 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1626 } 1627 return count; 1628 } 1629 1630 if (!strcmp(name, "svlan_cfi")) { 1631 len = num_arg(&user_buffer[i], 1, &value); 1632 if (len < 0) 1633 return len; 1634 1635 i += len; 1636 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1637 pkt_dev->svlan_cfi = value; 1638 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1639 } else { 1640 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1641 } 1642 return count; 1643 } 1644 1645 if (!strcmp(name, "tos")) { 1646 __u32 tmp_value = 0; 1647 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1648 if (len < 0) 1649 return len; 1650 1651 i += len; 1652 if (len == 2) { 1653 pkt_dev->tos = tmp_value; 1654 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1655 } else { 1656 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1657 } 1658 return count; 1659 } 1660 1661 if (!strcmp(name, "traffic_class")) { 1662 __u32 tmp_value = 0; 1663 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1664 if (len < 0) 1665 return len; 1666 1667 i += len; 1668 if (len == 2) { 1669 pkt_dev->traffic_class = tmp_value; 1670 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1671 } else { 1672 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1673 } 1674 return count; 1675 } 1676 1677 if (!strcmp(name, "skb_priority")) { 1678 len = num_arg(&user_buffer[i], 9, &value); 1679 if (len < 0) 1680 return len; 1681 1682 i += len; 1683 pkt_dev->skb_priority = value; 1684 sprintf(pg_result, "OK: skb_priority=%i", 1685 pkt_dev->skb_priority); 1686 return count; 1687 } 1688 1689 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1690 return -EINVAL; 1691 } 1692 1693 static int pktgen_if_open(struct inode *inode, struct file *file) 1694 { 1695 return single_open(file, pktgen_if_show, PDE(inode)->data); 1696 } 1697 1698 static const struct file_operations pktgen_if_fops = { 1699 .owner = THIS_MODULE, 1700 .open = pktgen_if_open, 1701 .read = seq_read, 1702 .llseek = seq_lseek, 1703 .write = pktgen_if_write, 1704 .release = single_release, 1705 }; 1706 1707 static int pktgen_thread_show(struct seq_file *seq, void *v) 1708 { 1709 struct pktgen_thread *t = seq->private; 1710 const struct pktgen_dev *pkt_dev; 1711 1712 BUG_ON(!t); 1713 1714 seq_printf(seq, "Running: "); 1715 1716 if_lock(t); 1717 list_for_each_entry(pkt_dev, &t->if_list, list) 1718 if (pkt_dev->running) 1719 seq_printf(seq, "%s ", pkt_dev->odevname); 1720 1721 seq_printf(seq, "\nStopped: "); 1722 1723 list_for_each_entry(pkt_dev, &t->if_list, list) 1724 if (!pkt_dev->running) 1725 seq_printf(seq, "%s ", pkt_dev->odevname); 1726 1727 if (t->result[0]) 1728 seq_printf(seq, "\nResult: %s\n", t->result); 1729 else 1730 seq_printf(seq, "\nResult: NA\n"); 1731 1732 if_unlock(t); 1733 1734 return 0; 1735 } 1736 1737 static ssize_t pktgen_thread_write(struct file *file, 1738 const char __user * user_buffer, 1739 size_t count, loff_t * offset) 1740 { 1741 struct seq_file *seq = file->private_data; 1742 struct pktgen_thread *t = seq->private; 1743 int i, max, len, ret; 1744 char name[40]; 1745 char *pg_result; 1746 1747 if (count < 1) { 1748 // sprintf(pg_result, "Wrong command format"); 1749 return -EINVAL; 1750 } 1751 1752 max = count; 1753 len = count_trail_chars(user_buffer, max); 1754 if (len < 0) 1755 return len; 1756 1757 i = len; 1758 1759 /* Read variable name */ 1760 1761 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1762 if (len < 0) 1763 return len; 1764 1765 memset(name, 0, sizeof(name)); 1766 if (copy_from_user(name, &user_buffer[i], len)) 1767 return -EFAULT; 1768 i += len; 1769 1770 max = count - i; 1771 len = count_trail_chars(&user_buffer[i], max); 1772 if (len < 0) 1773 return len; 1774 1775 i += len; 1776 1777 if (debug) 1778 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count); 1779 1780 if (!t) { 1781 pr_err("ERROR: No thread\n"); 1782 ret = -EINVAL; 1783 goto out; 1784 } 1785 1786 pg_result = &(t->result[0]); 1787 1788 if (!strcmp(name, "add_device")) { 1789 char f[32]; 1790 memset(f, 0, 32); 1791 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1792 if (len < 0) { 1793 ret = len; 1794 goto out; 1795 } 1796 if (copy_from_user(f, &user_buffer[i], len)) 1797 return -EFAULT; 1798 i += len; 1799 mutex_lock(&pktgen_thread_lock); 1800 pktgen_add_device(t, f); 1801 mutex_unlock(&pktgen_thread_lock); 1802 ret = count; 1803 sprintf(pg_result, "OK: add_device=%s", f); 1804 goto out; 1805 } 1806 1807 if (!strcmp(name, "rem_device_all")) { 1808 mutex_lock(&pktgen_thread_lock); 1809 t->control |= T_REMDEVALL; 1810 mutex_unlock(&pktgen_thread_lock); 1811 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1812 ret = count; 1813 sprintf(pg_result, "OK: rem_device_all"); 1814 goto out; 1815 } 1816 1817 if (!strcmp(name, "max_before_softirq")) { 1818 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1819 ret = count; 1820 goto out; 1821 } 1822 1823 ret = -EINVAL; 1824 out: 1825 return ret; 1826 } 1827 1828 static int pktgen_thread_open(struct inode *inode, struct file *file) 1829 { 1830 return single_open(file, pktgen_thread_show, PDE(inode)->data); 1831 } 1832 1833 static const struct file_operations pktgen_thread_fops = { 1834 .owner = THIS_MODULE, 1835 .open = pktgen_thread_open, 1836 .read = seq_read, 1837 .llseek = seq_lseek, 1838 .write = pktgen_thread_write, 1839 .release = single_release, 1840 }; 1841 1842 /* Think find or remove for NN */ 1843 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove) 1844 { 1845 struct pktgen_thread *t; 1846 struct pktgen_dev *pkt_dev = NULL; 1847 bool exact = (remove == FIND); 1848 1849 list_for_each_entry(t, &pktgen_threads, th_list) { 1850 pkt_dev = pktgen_find_dev(t, ifname, exact); 1851 if (pkt_dev) { 1852 if (remove) { 1853 if_lock(t); 1854 pkt_dev->removal_mark = 1; 1855 t->control |= T_REMDEV; 1856 if_unlock(t); 1857 } 1858 break; 1859 } 1860 } 1861 return pkt_dev; 1862 } 1863 1864 /* 1865 * mark a device for removal 1866 */ 1867 static void pktgen_mark_device(const char *ifname) 1868 { 1869 struct pktgen_dev *pkt_dev = NULL; 1870 const int max_tries = 10, msec_per_try = 125; 1871 int i = 0; 1872 1873 mutex_lock(&pktgen_thread_lock); 1874 pr_debug("%s: marking %s for removal\n", __func__, ifname); 1875 1876 while (1) { 1877 1878 pkt_dev = __pktgen_NN_threads(ifname, REMOVE); 1879 if (pkt_dev == NULL) 1880 break; /* success */ 1881 1882 mutex_unlock(&pktgen_thread_lock); 1883 pr_debug("%s: waiting for %s to disappear....\n", 1884 __func__, ifname); 1885 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1886 mutex_lock(&pktgen_thread_lock); 1887 1888 if (++i >= max_tries) { 1889 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n", 1890 __func__, msec_per_try * i, ifname); 1891 break; 1892 } 1893 1894 } 1895 1896 mutex_unlock(&pktgen_thread_lock); 1897 } 1898 1899 static void pktgen_change_name(struct net_device *dev) 1900 { 1901 struct pktgen_thread *t; 1902 1903 list_for_each_entry(t, &pktgen_threads, th_list) { 1904 struct pktgen_dev *pkt_dev; 1905 1906 list_for_each_entry(pkt_dev, &t->if_list, list) { 1907 if (pkt_dev->odev != dev) 1908 continue; 1909 1910 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 1911 1912 pkt_dev->entry = proc_create_data(dev->name, 0600, 1913 pg_proc_dir, 1914 &pktgen_if_fops, 1915 pkt_dev); 1916 if (!pkt_dev->entry) 1917 pr_err("can't move proc entry for '%s'\n", 1918 dev->name); 1919 break; 1920 } 1921 } 1922 } 1923 1924 static int pktgen_device_event(struct notifier_block *unused, 1925 unsigned long event, void *ptr) 1926 { 1927 struct net_device *dev = ptr; 1928 1929 if (!net_eq(dev_net(dev), &init_net) || pktgen_exiting) 1930 return NOTIFY_DONE; 1931 1932 /* It is OK that we do not hold the group lock right now, 1933 * as we run under the RTNL lock. 1934 */ 1935 1936 switch (event) { 1937 case NETDEV_CHANGENAME: 1938 pktgen_change_name(dev); 1939 break; 1940 1941 case NETDEV_UNREGISTER: 1942 pktgen_mark_device(dev->name); 1943 break; 1944 } 1945 1946 return NOTIFY_DONE; 1947 } 1948 1949 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev, 1950 const char *ifname) 1951 { 1952 char b[IFNAMSIZ+5]; 1953 int i; 1954 1955 for (i = 0; ifname[i] != '@'; i++) { 1956 if (i == IFNAMSIZ) 1957 break; 1958 1959 b[i] = ifname[i]; 1960 } 1961 b[i] = 0; 1962 1963 return dev_get_by_name(&init_net, b); 1964 } 1965 1966 1967 /* Associate pktgen_dev with a device. */ 1968 1969 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname) 1970 { 1971 struct net_device *odev; 1972 int err; 1973 1974 /* Clean old setups */ 1975 if (pkt_dev->odev) { 1976 dev_put(pkt_dev->odev); 1977 pkt_dev->odev = NULL; 1978 } 1979 1980 odev = pktgen_dev_get_by_name(pkt_dev, ifname); 1981 if (!odev) { 1982 pr_err("no such netdevice: \"%s\"\n", ifname); 1983 return -ENODEV; 1984 } 1985 1986 if (odev->type != ARPHRD_ETHER) { 1987 pr_err("not an ethernet device: \"%s\"\n", ifname); 1988 err = -EINVAL; 1989 } else if (!netif_running(odev)) { 1990 pr_err("device is down: \"%s\"\n", ifname); 1991 err = -ENETDOWN; 1992 } else { 1993 pkt_dev->odev = odev; 1994 return 0; 1995 } 1996 1997 dev_put(odev); 1998 return err; 1999 } 2000 2001 /* Read pkt_dev from the interface and set up internal pktgen_dev 2002 * structure to have the right information to create/send packets 2003 */ 2004 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 2005 { 2006 int ntxq; 2007 2008 if (!pkt_dev->odev) { 2009 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n"); 2010 sprintf(pkt_dev->result, 2011 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 2012 return; 2013 } 2014 2015 /* make sure that we don't pick a non-existing transmit queue */ 2016 ntxq = pkt_dev->odev->real_num_tx_queues; 2017 2018 if (ntxq <= pkt_dev->queue_map_min) { 2019 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2020 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, 2021 pkt_dev->odevname); 2022 pkt_dev->queue_map_min = (ntxq ?: 1) - 1; 2023 } 2024 if (pkt_dev->queue_map_max >= ntxq) { 2025 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2026 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, 2027 pkt_dev->odevname); 2028 pkt_dev->queue_map_max = (ntxq ?: 1) - 1; 2029 } 2030 2031 /* Default to the interface's mac if not explicitly set. */ 2032 2033 if (is_zero_ether_addr(pkt_dev->src_mac)) 2034 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN); 2035 2036 /* Set up Dest MAC */ 2037 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 2038 2039 /* Set up pkt size */ 2040 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2041 2042 if (pkt_dev->flags & F_IPV6) { 2043 /* 2044 * Skip this automatic address setting until locks or functions 2045 * gets exported 2046 */ 2047 2048 #ifdef NOTNOW 2049 int i, set = 0, err = 1; 2050 struct inet6_dev *idev; 2051 2052 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2053 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2054 set = 1; 2055 break; 2056 } 2057 2058 if (!set) { 2059 2060 /* 2061 * Use linklevel address if unconfigured. 2062 * 2063 * use ipv6_get_lladdr if/when it's get exported 2064 */ 2065 2066 rcu_read_lock(); 2067 idev = __in6_dev_get(pkt_dev->odev); 2068 if (idev) { 2069 struct inet6_ifaddr *ifp; 2070 2071 read_lock_bh(&idev->lock); 2072 for (ifp = idev->addr_list; ifp; 2073 ifp = ifp->if_next) { 2074 if (ifp->scope == IFA_LINK && 2075 !(ifp->flags & IFA_F_TENTATIVE)) { 2076 pkt_dev->cur_in6_saddr = ifp->addr; 2077 err = 0; 2078 break; 2079 } 2080 } 2081 read_unlock_bh(&idev->lock); 2082 } 2083 rcu_read_unlock(); 2084 if (err) 2085 pr_err("ERROR: IPv6 link address not available\n"); 2086 } 2087 #endif 2088 } else { 2089 pkt_dev->saddr_min = 0; 2090 pkt_dev->saddr_max = 0; 2091 if (strlen(pkt_dev->src_min) == 0) { 2092 2093 struct in_device *in_dev; 2094 2095 rcu_read_lock(); 2096 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2097 if (in_dev) { 2098 if (in_dev->ifa_list) { 2099 pkt_dev->saddr_min = 2100 in_dev->ifa_list->ifa_address; 2101 pkt_dev->saddr_max = pkt_dev->saddr_min; 2102 } 2103 } 2104 rcu_read_unlock(); 2105 } else { 2106 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2107 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2108 } 2109 2110 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2111 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2112 } 2113 /* Initialize current values. */ 2114 pkt_dev->cur_dst_mac_offset = 0; 2115 pkt_dev->cur_src_mac_offset = 0; 2116 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2117 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2118 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2119 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2120 pkt_dev->nflows = 0; 2121 } 2122 2123 2124 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) 2125 { 2126 ktime_t start_time, end_time; 2127 s64 remaining; 2128 struct hrtimer_sleeper t; 2129 2130 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); 2131 hrtimer_set_expires(&t.timer, spin_until); 2132 2133 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer)); 2134 if (remaining <= 0) { 2135 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2136 return; 2137 } 2138 2139 start_time = ktime_now(); 2140 if (remaining < 100000) { 2141 /* for small delays (<100us), just loop until limit is reached */ 2142 do { 2143 end_time = ktime_now(); 2144 } while (ktime_lt(end_time, spin_until)); 2145 } else { 2146 /* see do_nanosleep */ 2147 hrtimer_init_sleeper(&t, current); 2148 do { 2149 set_current_state(TASK_INTERRUPTIBLE); 2150 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS); 2151 if (!hrtimer_active(&t.timer)) 2152 t.task = NULL; 2153 2154 if (likely(t.task)) 2155 schedule(); 2156 2157 hrtimer_cancel(&t.timer); 2158 } while (t.task && pkt_dev->running && !signal_pending(current)); 2159 __set_current_state(TASK_RUNNING); 2160 end_time = ktime_now(); 2161 } 2162 2163 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); 2164 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2165 } 2166 2167 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2168 { 2169 pkt_dev->pkt_overhead = 0; 2170 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2171 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2172 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2173 } 2174 2175 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) 2176 { 2177 return !!(pkt_dev->flows[flow].flags & F_INIT); 2178 } 2179 2180 static inline int f_pick(struct pktgen_dev *pkt_dev) 2181 { 2182 int flow = pkt_dev->curfl; 2183 2184 if (pkt_dev->flags & F_FLOW_SEQ) { 2185 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2186 /* reset time */ 2187 pkt_dev->flows[flow].count = 0; 2188 pkt_dev->flows[flow].flags = 0; 2189 pkt_dev->curfl += 1; 2190 if (pkt_dev->curfl >= pkt_dev->cflows) 2191 pkt_dev->curfl = 0; /*reset */ 2192 } 2193 } else { 2194 flow = random32() % pkt_dev->cflows; 2195 pkt_dev->curfl = flow; 2196 2197 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2198 pkt_dev->flows[flow].count = 0; 2199 pkt_dev->flows[flow].flags = 0; 2200 } 2201 } 2202 2203 return pkt_dev->curfl; 2204 } 2205 2206 2207 #ifdef CONFIG_XFRM 2208 /* If there was already an IPSEC SA, we keep it as is, else 2209 * we go look for it ... 2210 */ 2211 #define DUMMY_MARK 0 2212 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2213 { 2214 struct xfrm_state *x = pkt_dev->flows[flow].x; 2215 if (!x) { 2216 /*slow path: we dont already have xfrm_state*/ 2217 x = xfrm_stateonly_find(&init_net, DUMMY_MARK, 2218 (xfrm_address_t *)&pkt_dev->cur_daddr, 2219 (xfrm_address_t *)&pkt_dev->cur_saddr, 2220 AF_INET, 2221 pkt_dev->ipsmode, 2222 pkt_dev->ipsproto, 0); 2223 if (x) { 2224 pkt_dev->flows[flow].x = x; 2225 set_pkt_overhead(pkt_dev); 2226 pkt_dev->pkt_overhead += x->props.header_len; 2227 } 2228 2229 } 2230 } 2231 #endif 2232 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2233 { 2234 2235 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2236 pkt_dev->cur_queue_map = smp_processor_id(); 2237 2238 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { 2239 __u16 t; 2240 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2241 t = random32() % 2242 (pkt_dev->queue_map_max - 2243 pkt_dev->queue_map_min + 1) 2244 + pkt_dev->queue_map_min; 2245 } else { 2246 t = pkt_dev->cur_queue_map + 1; 2247 if (t > pkt_dev->queue_map_max) 2248 t = pkt_dev->queue_map_min; 2249 } 2250 pkt_dev->cur_queue_map = t; 2251 } 2252 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2253 } 2254 2255 /* Increment/randomize headers according to flags and current values 2256 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2257 */ 2258 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2259 { 2260 __u32 imn; 2261 __u32 imx; 2262 int flow = 0; 2263 2264 if (pkt_dev->cflows) 2265 flow = f_pick(pkt_dev); 2266 2267 /* Deal with source MAC */ 2268 if (pkt_dev->src_mac_count > 1) { 2269 __u32 mc; 2270 __u32 tmp; 2271 2272 if (pkt_dev->flags & F_MACSRC_RND) 2273 mc = random32() % pkt_dev->src_mac_count; 2274 else { 2275 mc = pkt_dev->cur_src_mac_offset++; 2276 if (pkt_dev->cur_src_mac_offset >= 2277 pkt_dev->src_mac_count) 2278 pkt_dev->cur_src_mac_offset = 0; 2279 } 2280 2281 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2282 pkt_dev->hh[11] = tmp; 2283 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2284 pkt_dev->hh[10] = tmp; 2285 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2286 pkt_dev->hh[9] = tmp; 2287 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2288 pkt_dev->hh[8] = tmp; 2289 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2290 pkt_dev->hh[7] = tmp; 2291 } 2292 2293 /* Deal with Destination MAC */ 2294 if (pkt_dev->dst_mac_count > 1) { 2295 __u32 mc; 2296 __u32 tmp; 2297 2298 if (pkt_dev->flags & F_MACDST_RND) 2299 mc = random32() % pkt_dev->dst_mac_count; 2300 2301 else { 2302 mc = pkt_dev->cur_dst_mac_offset++; 2303 if (pkt_dev->cur_dst_mac_offset >= 2304 pkt_dev->dst_mac_count) { 2305 pkt_dev->cur_dst_mac_offset = 0; 2306 } 2307 } 2308 2309 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2310 pkt_dev->hh[5] = tmp; 2311 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2312 pkt_dev->hh[4] = tmp; 2313 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2314 pkt_dev->hh[3] = tmp; 2315 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2316 pkt_dev->hh[2] = tmp; 2317 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2318 pkt_dev->hh[1] = tmp; 2319 } 2320 2321 if (pkt_dev->flags & F_MPLS_RND) { 2322 unsigned int i; 2323 for (i = 0; i < pkt_dev->nr_labels; i++) 2324 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2325 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2326 ((__force __be32)random32() & 2327 htonl(0x000fffff)); 2328 } 2329 2330 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2331 pkt_dev->vlan_id = random32() & (4096-1); 2332 } 2333 2334 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2335 pkt_dev->svlan_id = random32() & (4096 - 1); 2336 } 2337 2338 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2339 if (pkt_dev->flags & F_UDPSRC_RND) 2340 pkt_dev->cur_udp_src = random32() % 2341 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2342 + pkt_dev->udp_src_min; 2343 2344 else { 2345 pkt_dev->cur_udp_src++; 2346 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2347 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2348 } 2349 } 2350 2351 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2352 if (pkt_dev->flags & F_UDPDST_RND) { 2353 pkt_dev->cur_udp_dst = random32() % 2354 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2355 + pkt_dev->udp_dst_min; 2356 } else { 2357 pkt_dev->cur_udp_dst++; 2358 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2359 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2360 } 2361 } 2362 2363 if (!(pkt_dev->flags & F_IPV6)) { 2364 2365 imn = ntohl(pkt_dev->saddr_min); 2366 imx = ntohl(pkt_dev->saddr_max); 2367 if (imn < imx) { 2368 __u32 t; 2369 if (pkt_dev->flags & F_IPSRC_RND) 2370 t = random32() % (imx - imn) + imn; 2371 else { 2372 t = ntohl(pkt_dev->cur_saddr); 2373 t++; 2374 if (t > imx) 2375 t = imn; 2376 2377 } 2378 pkt_dev->cur_saddr = htonl(t); 2379 } 2380 2381 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2382 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2383 } else { 2384 imn = ntohl(pkt_dev->daddr_min); 2385 imx = ntohl(pkt_dev->daddr_max); 2386 if (imn < imx) { 2387 __u32 t; 2388 __be32 s; 2389 if (pkt_dev->flags & F_IPDST_RND) { 2390 2391 t = random32() % (imx - imn) + imn; 2392 s = htonl(t); 2393 2394 while (ipv4_is_loopback(s) || 2395 ipv4_is_multicast(s) || 2396 ipv4_is_lbcast(s) || 2397 ipv4_is_zeronet(s) || 2398 ipv4_is_local_multicast(s)) { 2399 t = random32() % (imx - imn) + imn; 2400 s = htonl(t); 2401 } 2402 pkt_dev->cur_daddr = s; 2403 } else { 2404 t = ntohl(pkt_dev->cur_daddr); 2405 t++; 2406 if (t > imx) { 2407 t = imn; 2408 } 2409 pkt_dev->cur_daddr = htonl(t); 2410 } 2411 } 2412 if (pkt_dev->cflows) { 2413 pkt_dev->flows[flow].flags |= F_INIT; 2414 pkt_dev->flows[flow].cur_daddr = 2415 pkt_dev->cur_daddr; 2416 #ifdef CONFIG_XFRM 2417 if (pkt_dev->flags & F_IPSEC_ON) 2418 get_ipsec_sa(pkt_dev, flow); 2419 #endif 2420 pkt_dev->nflows++; 2421 } 2422 } 2423 } else { /* IPV6 * */ 2424 2425 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 && 2426 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 && 2427 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 && 2428 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ; 2429 else { 2430 int i; 2431 2432 /* Only random destinations yet */ 2433 2434 for (i = 0; i < 4; i++) { 2435 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2436 (((__force __be32)random32() | 2437 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2438 pkt_dev->max_in6_daddr.s6_addr32[i]); 2439 } 2440 } 2441 } 2442 2443 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2444 __u32 t; 2445 if (pkt_dev->flags & F_TXSIZE_RND) { 2446 t = random32() % 2447 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2448 + pkt_dev->min_pkt_size; 2449 } else { 2450 t = pkt_dev->cur_pkt_size + 1; 2451 if (t > pkt_dev->max_pkt_size) 2452 t = pkt_dev->min_pkt_size; 2453 } 2454 pkt_dev->cur_pkt_size = t; 2455 } 2456 2457 set_cur_queue_map(pkt_dev); 2458 2459 pkt_dev->flows[flow].count++; 2460 } 2461 2462 2463 #ifdef CONFIG_XFRM 2464 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2465 { 2466 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2467 int err = 0; 2468 2469 if (!x) 2470 return 0; 2471 /* XXX: we dont support tunnel mode for now until 2472 * we resolve the dst issue */ 2473 if (x->props.mode != XFRM_MODE_TRANSPORT) 2474 return 0; 2475 2476 spin_lock(&x->lock); 2477 2478 err = x->outer_mode->output(x, skb); 2479 if (err) 2480 goto error; 2481 err = x->type->output(x, skb); 2482 if (err) 2483 goto error; 2484 2485 x->curlft.bytes += skb->len; 2486 x->curlft.packets++; 2487 error: 2488 spin_unlock(&x->lock); 2489 return err; 2490 } 2491 2492 static void free_SAs(struct pktgen_dev *pkt_dev) 2493 { 2494 if (pkt_dev->cflows) { 2495 /* let go of the SAs if we have them */ 2496 int i; 2497 for (i = 0; i < pkt_dev->cflows; i++) { 2498 struct xfrm_state *x = pkt_dev->flows[i].x; 2499 if (x) { 2500 xfrm_state_put(x); 2501 pkt_dev->flows[i].x = NULL; 2502 } 2503 } 2504 } 2505 } 2506 2507 static int process_ipsec(struct pktgen_dev *pkt_dev, 2508 struct sk_buff *skb, __be16 protocol) 2509 { 2510 if (pkt_dev->flags & F_IPSEC_ON) { 2511 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2512 int nhead = 0; 2513 if (x) { 2514 int ret; 2515 __u8 *eth; 2516 nhead = x->props.header_len - skb_headroom(skb); 2517 if (nhead > 0) { 2518 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2519 if (ret < 0) { 2520 pr_err("Error expanding ipsec packet %d\n", 2521 ret); 2522 goto err; 2523 } 2524 } 2525 2526 /* ipsec is not expecting ll header */ 2527 skb_pull(skb, ETH_HLEN); 2528 ret = pktgen_output_ipsec(skb, pkt_dev); 2529 if (ret) { 2530 pr_err("Error creating ipsec packet %d\n", ret); 2531 goto err; 2532 } 2533 /* restore ll */ 2534 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2535 memcpy(eth, pkt_dev->hh, 12); 2536 *(u16 *) ð[12] = protocol; 2537 } 2538 } 2539 return 1; 2540 err: 2541 kfree_skb(skb); 2542 return 0; 2543 } 2544 #endif 2545 2546 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2547 { 2548 unsigned int i; 2549 for (i = 0; i < pkt_dev->nr_labels; i++) 2550 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2551 2552 mpls--; 2553 *mpls |= MPLS_STACK_BOTTOM; 2554 } 2555 2556 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2557 unsigned int prio) 2558 { 2559 return htons(id | (cfi << 12) | (prio << 13)); 2560 } 2561 2562 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb, 2563 int datalen) 2564 { 2565 struct timeval timestamp; 2566 struct pktgen_hdr *pgh; 2567 2568 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh)); 2569 datalen -= sizeof(*pgh); 2570 2571 if (pkt_dev->nfrags <= 0) { 2572 memset(skb_put(skb, datalen), 0, datalen); 2573 } else { 2574 int frags = pkt_dev->nfrags; 2575 int i, len; 2576 int frag_len; 2577 2578 2579 if (frags > MAX_SKB_FRAGS) 2580 frags = MAX_SKB_FRAGS; 2581 len = datalen - frags * PAGE_SIZE; 2582 if (len > 0) { 2583 memset(skb_put(skb, len), 0, len); 2584 datalen = frags * PAGE_SIZE; 2585 } 2586 2587 i = 0; 2588 frag_len = (datalen/frags) < PAGE_SIZE ? 2589 (datalen/frags) : PAGE_SIZE; 2590 while (datalen > 0) { 2591 if (unlikely(!pkt_dev->page)) { 2592 int node = numa_node_id(); 2593 2594 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE)) 2595 node = pkt_dev->node; 2596 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0); 2597 if (!pkt_dev->page) 2598 break; 2599 } 2600 get_page(pkt_dev->page); 2601 skb_frag_set_page(skb, i, pkt_dev->page); 2602 skb_shinfo(skb)->frags[i].page_offset = 0; 2603 /*last fragment, fill rest of data*/ 2604 if (i == (frags - 1)) 2605 skb_frag_size_set(&skb_shinfo(skb)->frags[i], 2606 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE)); 2607 else 2608 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len); 2609 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]); 2610 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]); 2611 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]); 2612 i++; 2613 skb_shinfo(skb)->nr_frags = i; 2614 } 2615 } 2616 2617 /* Stamp the time, and sequence number, 2618 * convert them to network byte order 2619 */ 2620 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2621 pgh->seq_num = htonl(pkt_dev->seq_num); 2622 2623 do_gettimeofday(×tamp); 2624 pgh->tv_sec = htonl(timestamp.tv_sec); 2625 pgh->tv_usec = htonl(timestamp.tv_usec); 2626 } 2627 2628 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2629 struct pktgen_dev *pkt_dev) 2630 { 2631 struct sk_buff *skb = NULL; 2632 __u8 *eth; 2633 struct udphdr *udph; 2634 int datalen, iplen; 2635 struct iphdr *iph; 2636 __be16 protocol = htons(ETH_P_IP); 2637 __be32 *mpls; 2638 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2639 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2640 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2641 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2642 u16 queue_map; 2643 2644 if (pkt_dev->nr_labels) 2645 protocol = htons(ETH_P_MPLS_UC); 2646 2647 if (pkt_dev->vlan_id != 0xffff) 2648 protocol = htons(ETH_P_8021Q); 2649 2650 /* Update any of the values, used when we're incrementing various 2651 * fields. 2652 */ 2653 mod_cur_headers(pkt_dev); 2654 queue_map = pkt_dev->cur_queue_map; 2655 2656 datalen = (odev->hard_header_len + 16) & ~0xf; 2657 2658 if (pkt_dev->flags & F_NODE) { 2659 int node; 2660 2661 if (pkt_dev->node >= 0) 2662 node = pkt_dev->node; 2663 else 2664 node = numa_node_id(); 2665 2666 skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64 2667 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node); 2668 if (likely(skb)) { 2669 skb_reserve(skb, NET_SKB_PAD); 2670 skb->dev = odev; 2671 } 2672 } 2673 else 2674 skb = __netdev_alloc_skb(odev, 2675 pkt_dev->cur_pkt_size + 64 2676 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT); 2677 2678 if (!skb) { 2679 sprintf(pkt_dev->result, "No memory"); 2680 return NULL; 2681 } 2682 prefetchw(skb->data); 2683 2684 skb_reserve(skb, datalen); 2685 2686 /* Reserve for ethernet and IP header */ 2687 eth = (__u8 *) skb_push(skb, 14); 2688 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2689 if (pkt_dev->nr_labels) 2690 mpls_push(mpls, pkt_dev); 2691 2692 if (pkt_dev->vlan_id != 0xffff) { 2693 if (pkt_dev->svlan_id != 0xffff) { 2694 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2695 *svlan_tci = build_tci(pkt_dev->svlan_id, 2696 pkt_dev->svlan_cfi, 2697 pkt_dev->svlan_p); 2698 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2699 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2700 } 2701 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2702 *vlan_tci = build_tci(pkt_dev->vlan_id, 2703 pkt_dev->vlan_cfi, 2704 pkt_dev->vlan_p); 2705 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2706 *vlan_encapsulated_proto = htons(ETH_P_IP); 2707 } 2708 2709 skb->network_header = skb->tail; 2710 skb->transport_header = skb->network_header + sizeof(struct iphdr); 2711 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr)); 2712 skb_set_queue_mapping(skb, queue_map); 2713 skb->priority = pkt_dev->skb_priority; 2714 2715 iph = ip_hdr(skb); 2716 udph = udp_hdr(skb); 2717 2718 memcpy(eth, pkt_dev->hh, 12); 2719 *(__be16 *) & eth[12] = protocol; 2720 2721 /* Eth + IPh + UDPh + mpls */ 2722 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2723 pkt_dev->pkt_overhead; 2724 if (datalen < sizeof(struct pktgen_hdr)) 2725 datalen = sizeof(struct pktgen_hdr); 2726 2727 udph->source = htons(pkt_dev->cur_udp_src); 2728 udph->dest = htons(pkt_dev->cur_udp_dst); 2729 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2730 udph->check = 0; /* No checksum */ 2731 2732 iph->ihl = 5; 2733 iph->version = 4; 2734 iph->ttl = 32; 2735 iph->tos = pkt_dev->tos; 2736 iph->protocol = IPPROTO_UDP; /* UDP */ 2737 iph->saddr = pkt_dev->cur_saddr; 2738 iph->daddr = pkt_dev->cur_daddr; 2739 iph->id = htons(pkt_dev->ip_id); 2740 pkt_dev->ip_id++; 2741 iph->frag_off = 0; 2742 iplen = 20 + 8 + datalen; 2743 iph->tot_len = htons(iplen); 2744 iph->check = 0; 2745 iph->check = ip_fast_csum((void *)iph, iph->ihl); 2746 skb->protocol = protocol; 2747 skb->mac_header = (skb->network_header - ETH_HLEN - 2748 pkt_dev->pkt_overhead); 2749 skb->dev = odev; 2750 skb->pkt_type = PACKET_HOST; 2751 pktgen_finalize_skb(pkt_dev, skb, datalen); 2752 2753 #ifdef CONFIG_XFRM 2754 if (!process_ipsec(pkt_dev, skb, protocol)) 2755 return NULL; 2756 #endif 2757 2758 return skb; 2759 } 2760 2761 /* 2762 * scan_ip6, fmt_ip taken from dietlibc-0.21 2763 * Author Felix von Leitner <felix-dietlibc@fefe.de> 2764 * 2765 * Slightly modified for kernel. 2766 * Should be candidate for net/ipv4/utils.c 2767 * --ro 2768 */ 2769 2770 static unsigned int scan_ip6(const char *s, char ip[16]) 2771 { 2772 unsigned int i; 2773 unsigned int len = 0; 2774 unsigned long u; 2775 char suffix[16]; 2776 unsigned int prefixlen = 0; 2777 unsigned int suffixlen = 0; 2778 __be32 tmp; 2779 char *pos; 2780 2781 for (i = 0; i < 16; i++) 2782 ip[i] = 0; 2783 2784 for (;;) { 2785 if (*s == ':') { 2786 len++; 2787 if (s[1] == ':') { /* Found "::", skip to part 2 */ 2788 s += 2; 2789 len++; 2790 break; 2791 } 2792 s++; 2793 } 2794 2795 u = simple_strtoul(s, &pos, 16); 2796 i = pos - s; 2797 if (!i) 2798 return 0; 2799 if (prefixlen == 12 && s[i] == '.') { 2800 2801 /* the last 4 bytes may be written as IPv4 address */ 2802 2803 tmp = in_aton(s); 2804 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp)); 2805 return i + len; 2806 } 2807 ip[prefixlen++] = (u >> 8); 2808 ip[prefixlen++] = (u & 255); 2809 s += i; 2810 len += i; 2811 if (prefixlen == 16) 2812 return len; 2813 } 2814 2815 /* part 2, after "::" */ 2816 for (;;) { 2817 if (*s == ':') { 2818 if (suffixlen == 0) 2819 break; 2820 s++; 2821 len++; 2822 } else if (suffixlen != 0) 2823 break; 2824 2825 u = simple_strtol(s, &pos, 16); 2826 i = pos - s; 2827 if (!i) { 2828 if (*s) 2829 len--; 2830 break; 2831 } 2832 if (suffixlen + prefixlen <= 12 && s[i] == '.') { 2833 tmp = in_aton(s); 2834 memcpy((struct in_addr *)(suffix + suffixlen), &tmp, 2835 sizeof(tmp)); 2836 suffixlen += 4; 2837 len += strlen(s); 2838 break; 2839 } 2840 suffix[suffixlen++] = (u >> 8); 2841 suffix[suffixlen++] = (u & 255); 2842 s += i; 2843 len += i; 2844 if (prefixlen + suffixlen == 16) 2845 break; 2846 } 2847 for (i = 0; i < suffixlen; i++) 2848 ip[16 - suffixlen + i] = suffix[i]; 2849 return len; 2850 } 2851 2852 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2853 struct pktgen_dev *pkt_dev) 2854 { 2855 struct sk_buff *skb = NULL; 2856 __u8 *eth; 2857 struct udphdr *udph; 2858 int datalen; 2859 struct ipv6hdr *iph; 2860 __be16 protocol = htons(ETH_P_IPV6); 2861 __be32 *mpls; 2862 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2863 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2864 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2865 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2866 u16 queue_map; 2867 2868 if (pkt_dev->nr_labels) 2869 protocol = htons(ETH_P_MPLS_UC); 2870 2871 if (pkt_dev->vlan_id != 0xffff) 2872 protocol = htons(ETH_P_8021Q); 2873 2874 /* Update any of the values, used when we're incrementing various 2875 * fields. 2876 */ 2877 mod_cur_headers(pkt_dev); 2878 queue_map = pkt_dev->cur_queue_map; 2879 2880 skb = __netdev_alloc_skb(odev, 2881 pkt_dev->cur_pkt_size + 64 2882 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT); 2883 if (!skb) { 2884 sprintf(pkt_dev->result, "No memory"); 2885 return NULL; 2886 } 2887 prefetchw(skb->data); 2888 2889 skb_reserve(skb, 16); 2890 2891 /* Reserve for ethernet and IP header */ 2892 eth = (__u8 *) skb_push(skb, 14); 2893 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2894 if (pkt_dev->nr_labels) 2895 mpls_push(mpls, pkt_dev); 2896 2897 if (pkt_dev->vlan_id != 0xffff) { 2898 if (pkt_dev->svlan_id != 0xffff) { 2899 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2900 *svlan_tci = build_tci(pkt_dev->svlan_id, 2901 pkt_dev->svlan_cfi, 2902 pkt_dev->svlan_p); 2903 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2904 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2905 } 2906 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2907 *vlan_tci = build_tci(pkt_dev->vlan_id, 2908 pkt_dev->vlan_cfi, 2909 pkt_dev->vlan_p); 2910 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2911 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 2912 } 2913 2914 skb->network_header = skb->tail; 2915 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr); 2916 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr)); 2917 skb_set_queue_mapping(skb, queue_map); 2918 skb->priority = pkt_dev->skb_priority; 2919 iph = ipv6_hdr(skb); 2920 udph = udp_hdr(skb); 2921 2922 memcpy(eth, pkt_dev->hh, 12); 2923 *(__be16 *) ð[12] = protocol; 2924 2925 /* Eth + IPh + UDPh + mpls */ 2926 datalen = pkt_dev->cur_pkt_size - 14 - 2927 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 2928 pkt_dev->pkt_overhead; 2929 2930 if (datalen < sizeof(struct pktgen_hdr)) { 2931 datalen = sizeof(struct pktgen_hdr); 2932 net_info_ratelimited("increased datalen to %d\n", datalen); 2933 } 2934 2935 udph->source = htons(pkt_dev->cur_udp_src); 2936 udph->dest = htons(pkt_dev->cur_udp_dst); 2937 udph->len = htons(datalen + sizeof(struct udphdr)); 2938 udph->check = 0; /* No checksum */ 2939 2940 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 2941 2942 if (pkt_dev->traffic_class) { 2943 /* Version + traffic class + flow (0) */ 2944 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 2945 } 2946 2947 iph->hop_limit = 32; 2948 2949 iph->payload_len = htons(sizeof(struct udphdr) + datalen); 2950 iph->nexthdr = IPPROTO_UDP; 2951 2952 iph->daddr = pkt_dev->cur_in6_daddr; 2953 iph->saddr = pkt_dev->cur_in6_saddr; 2954 2955 skb->mac_header = (skb->network_header - ETH_HLEN - 2956 pkt_dev->pkt_overhead); 2957 skb->protocol = protocol; 2958 skb->dev = odev; 2959 skb->pkt_type = PACKET_HOST; 2960 2961 pktgen_finalize_skb(pkt_dev, skb, datalen); 2962 2963 return skb; 2964 } 2965 2966 static struct sk_buff *fill_packet(struct net_device *odev, 2967 struct pktgen_dev *pkt_dev) 2968 { 2969 if (pkt_dev->flags & F_IPV6) 2970 return fill_packet_ipv6(odev, pkt_dev); 2971 else 2972 return fill_packet_ipv4(odev, pkt_dev); 2973 } 2974 2975 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 2976 { 2977 pkt_dev->seq_num = 1; 2978 pkt_dev->idle_acc = 0; 2979 pkt_dev->sofar = 0; 2980 pkt_dev->tx_bytes = 0; 2981 pkt_dev->errors = 0; 2982 } 2983 2984 /* Set up structure for sending pkts, clear counters */ 2985 2986 static void pktgen_run(struct pktgen_thread *t) 2987 { 2988 struct pktgen_dev *pkt_dev; 2989 int started = 0; 2990 2991 func_enter(); 2992 2993 if_lock(t); 2994 list_for_each_entry(pkt_dev, &t->if_list, list) { 2995 2996 /* 2997 * setup odev and create initial packet. 2998 */ 2999 pktgen_setup_inject(pkt_dev); 3000 3001 if (pkt_dev->odev) { 3002 pktgen_clear_counters(pkt_dev); 3003 pkt_dev->running = 1; /* Cranke yeself! */ 3004 pkt_dev->skb = NULL; 3005 pkt_dev->started_at = 3006 pkt_dev->next_tx = ktime_now(); 3007 3008 set_pkt_overhead(pkt_dev); 3009 3010 strcpy(pkt_dev->result, "Starting"); 3011 started++; 3012 } else 3013 strcpy(pkt_dev->result, "Error starting"); 3014 } 3015 if_unlock(t); 3016 if (started) 3017 t->control &= ~(T_STOP); 3018 } 3019 3020 static void pktgen_stop_all_threads_ifs(void) 3021 { 3022 struct pktgen_thread *t; 3023 3024 func_enter(); 3025 3026 mutex_lock(&pktgen_thread_lock); 3027 3028 list_for_each_entry(t, &pktgen_threads, th_list) 3029 t->control |= T_STOP; 3030 3031 mutex_unlock(&pktgen_thread_lock); 3032 } 3033 3034 static int thread_is_running(const struct pktgen_thread *t) 3035 { 3036 const struct pktgen_dev *pkt_dev; 3037 3038 list_for_each_entry(pkt_dev, &t->if_list, list) 3039 if (pkt_dev->running) 3040 return 1; 3041 return 0; 3042 } 3043 3044 static int pktgen_wait_thread_run(struct pktgen_thread *t) 3045 { 3046 if_lock(t); 3047 3048 while (thread_is_running(t)) { 3049 3050 if_unlock(t); 3051 3052 msleep_interruptible(100); 3053 3054 if (signal_pending(current)) 3055 goto signal; 3056 if_lock(t); 3057 } 3058 if_unlock(t); 3059 return 1; 3060 signal: 3061 return 0; 3062 } 3063 3064 static int pktgen_wait_all_threads_run(void) 3065 { 3066 struct pktgen_thread *t; 3067 int sig = 1; 3068 3069 mutex_lock(&pktgen_thread_lock); 3070 3071 list_for_each_entry(t, &pktgen_threads, th_list) { 3072 sig = pktgen_wait_thread_run(t); 3073 if (sig == 0) 3074 break; 3075 } 3076 3077 if (sig == 0) 3078 list_for_each_entry(t, &pktgen_threads, th_list) 3079 t->control |= (T_STOP); 3080 3081 mutex_unlock(&pktgen_thread_lock); 3082 return sig; 3083 } 3084 3085 static void pktgen_run_all_threads(void) 3086 { 3087 struct pktgen_thread *t; 3088 3089 func_enter(); 3090 3091 mutex_lock(&pktgen_thread_lock); 3092 3093 list_for_each_entry(t, &pktgen_threads, th_list) 3094 t->control |= (T_RUN); 3095 3096 mutex_unlock(&pktgen_thread_lock); 3097 3098 /* Propagate thread->control */ 3099 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3100 3101 pktgen_wait_all_threads_run(); 3102 } 3103 3104 static void pktgen_reset_all_threads(void) 3105 { 3106 struct pktgen_thread *t; 3107 3108 func_enter(); 3109 3110 mutex_lock(&pktgen_thread_lock); 3111 3112 list_for_each_entry(t, &pktgen_threads, th_list) 3113 t->control |= (T_REMDEVALL); 3114 3115 mutex_unlock(&pktgen_thread_lock); 3116 3117 /* Propagate thread->control */ 3118 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3119 3120 pktgen_wait_all_threads_run(); 3121 } 3122 3123 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3124 { 3125 __u64 bps, mbps, pps; 3126 char *p = pkt_dev->result; 3127 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3128 pkt_dev->started_at); 3129 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3130 3131 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", 3132 (unsigned long long)ktime_to_us(elapsed), 3133 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3134 (unsigned long long)ktime_to_us(idle), 3135 (unsigned long long)pkt_dev->sofar, 3136 pkt_dev->cur_pkt_size, nr_frags); 3137 3138 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3139 ktime_to_ns(elapsed)); 3140 3141 bps = pps * 8 * pkt_dev->cur_pkt_size; 3142 3143 mbps = bps; 3144 do_div(mbps, 1000000); 3145 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3146 (unsigned long long)pps, 3147 (unsigned long long)mbps, 3148 (unsigned long long)bps, 3149 (unsigned long long)pkt_dev->errors); 3150 } 3151 3152 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3153 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3154 { 3155 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3156 3157 if (!pkt_dev->running) { 3158 pr_warning("interface: %s is already stopped\n", 3159 pkt_dev->odevname); 3160 return -EINVAL; 3161 } 3162 3163 kfree_skb(pkt_dev->skb); 3164 pkt_dev->skb = NULL; 3165 pkt_dev->stopped_at = ktime_now(); 3166 pkt_dev->running = 0; 3167 3168 show_results(pkt_dev, nr_frags); 3169 3170 return 0; 3171 } 3172 3173 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3174 { 3175 struct pktgen_dev *pkt_dev, *best = NULL; 3176 3177 if_lock(t); 3178 3179 list_for_each_entry(pkt_dev, &t->if_list, list) { 3180 if (!pkt_dev->running) 3181 continue; 3182 if (best == NULL) 3183 best = pkt_dev; 3184 else if (ktime_lt(pkt_dev->next_tx, best->next_tx)) 3185 best = pkt_dev; 3186 } 3187 if_unlock(t); 3188 return best; 3189 } 3190 3191 static void pktgen_stop(struct pktgen_thread *t) 3192 { 3193 struct pktgen_dev *pkt_dev; 3194 3195 func_enter(); 3196 3197 if_lock(t); 3198 3199 list_for_each_entry(pkt_dev, &t->if_list, list) { 3200 pktgen_stop_device(pkt_dev); 3201 } 3202 3203 if_unlock(t); 3204 } 3205 3206 /* 3207 * one of our devices needs to be removed - find it 3208 * and remove it 3209 */ 3210 static void pktgen_rem_one_if(struct pktgen_thread *t) 3211 { 3212 struct list_head *q, *n; 3213 struct pktgen_dev *cur; 3214 3215 func_enter(); 3216 3217 if_lock(t); 3218 3219 list_for_each_safe(q, n, &t->if_list) { 3220 cur = list_entry(q, struct pktgen_dev, list); 3221 3222 if (!cur->removal_mark) 3223 continue; 3224 3225 kfree_skb(cur->skb); 3226 cur->skb = NULL; 3227 3228 pktgen_remove_device(t, cur); 3229 3230 break; 3231 } 3232 3233 if_unlock(t); 3234 } 3235 3236 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3237 { 3238 struct list_head *q, *n; 3239 struct pktgen_dev *cur; 3240 3241 func_enter(); 3242 3243 /* Remove all devices, free mem */ 3244 3245 if_lock(t); 3246 3247 list_for_each_safe(q, n, &t->if_list) { 3248 cur = list_entry(q, struct pktgen_dev, list); 3249 3250 kfree_skb(cur->skb); 3251 cur->skb = NULL; 3252 3253 pktgen_remove_device(t, cur); 3254 } 3255 3256 if_unlock(t); 3257 } 3258 3259 static void pktgen_rem_thread(struct pktgen_thread *t) 3260 { 3261 /* Remove from the thread list */ 3262 3263 remove_proc_entry(t->tsk->comm, pg_proc_dir); 3264 3265 } 3266 3267 static void pktgen_resched(struct pktgen_dev *pkt_dev) 3268 { 3269 ktime_t idle_start = ktime_now(); 3270 schedule(); 3271 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3272 } 3273 3274 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) 3275 { 3276 ktime_t idle_start = ktime_now(); 3277 3278 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3279 if (signal_pending(current)) 3280 break; 3281 3282 if (need_resched()) 3283 pktgen_resched(pkt_dev); 3284 else 3285 cpu_relax(); 3286 } 3287 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3288 } 3289 3290 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3291 { 3292 struct net_device *odev = pkt_dev->odev; 3293 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *) 3294 = odev->netdev_ops->ndo_start_xmit; 3295 struct netdev_queue *txq; 3296 u16 queue_map; 3297 int ret; 3298 3299 /* If device is offline, then don't send */ 3300 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { 3301 pktgen_stop_device(pkt_dev); 3302 return; 3303 } 3304 3305 /* This is max DELAY, this has special meaning of 3306 * "never transmit" 3307 */ 3308 if (unlikely(pkt_dev->delay == ULLONG_MAX)) { 3309 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX); 3310 return; 3311 } 3312 3313 /* If no skb or clone count exhausted then get new one */ 3314 if (!pkt_dev->skb || (pkt_dev->last_ok && 3315 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { 3316 /* build a new pkt */ 3317 kfree_skb(pkt_dev->skb); 3318 3319 pkt_dev->skb = fill_packet(odev, pkt_dev); 3320 if (pkt_dev->skb == NULL) { 3321 pr_err("ERROR: couldn't allocate skb in fill_packet\n"); 3322 schedule(); 3323 pkt_dev->clone_count--; /* back out increment, OOM */ 3324 return; 3325 } 3326 pkt_dev->last_pkt_size = pkt_dev->skb->len; 3327 pkt_dev->allocated_skbs++; 3328 pkt_dev->clone_count = 0; /* reset counter */ 3329 } 3330 3331 if (pkt_dev->delay && pkt_dev->last_ok) 3332 spin(pkt_dev, pkt_dev->next_tx); 3333 3334 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3335 txq = netdev_get_tx_queue(odev, queue_map); 3336 3337 __netif_tx_lock_bh(txq); 3338 3339 if (unlikely(netif_xmit_frozen_or_stopped(txq))) { 3340 ret = NETDEV_TX_BUSY; 3341 pkt_dev->last_ok = 0; 3342 goto unlock; 3343 } 3344 atomic_inc(&(pkt_dev->skb->users)); 3345 ret = (*xmit)(pkt_dev->skb, odev); 3346 3347 switch (ret) { 3348 case NETDEV_TX_OK: 3349 txq_trans_update(txq); 3350 pkt_dev->last_ok = 1; 3351 pkt_dev->sofar++; 3352 pkt_dev->seq_num++; 3353 pkt_dev->tx_bytes += pkt_dev->last_pkt_size; 3354 break; 3355 case NET_XMIT_DROP: 3356 case NET_XMIT_CN: 3357 case NET_XMIT_POLICED: 3358 /* skb has been consumed */ 3359 pkt_dev->errors++; 3360 break; 3361 default: /* Drivers are not supposed to return other values! */ 3362 net_info_ratelimited("%s xmit error: %d\n", 3363 pkt_dev->odevname, ret); 3364 pkt_dev->errors++; 3365 /* fallthru */ 3366 case NETDEV_TX_LOCKED: 3367 case NETDEV_TX_BUSY: 3368 /* Retry it next time */ 3369 atomic_dec(&(pkt_dev->skb->users)); 3370 pkt_dev->last_ok = 0; 3371 } 3372 unlock: 3373 __netif_tx_unlock_bh(txq); 3374 3375 /* If pkt_dev->count is zero, then run forever */ 3376 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3377 pktgen_wait_for_skb(pkt_dev); 3378 3379 /* Done with this */ 3380 pktgen_stop_device(pkt_dev); 3381 } 3382 } 3383 3384 /* 3385 * Main loop of the thread goes here 3386 */ 3387 3388 static int pktgen_thread_worker(void *arg) 3389 { 3390 DEFINE_WAIT(wait); 3391 struct pktgen_thread *t = arg; 3392 struct pktgen_dev *pkt_dev = NULL; 3393 int cpu = t->cpu; 3394 3395 BUG_ON(smp_processor_id() != cpu); 3396 3397 init_waitqueue_head(&t->queue); 3398 complete(&t->start_done); 3399 3400 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); 3401 3402 set_current_state(TASK_INTERRUPTIBLE); 3403 3404 set_freezable(); 3405 3406 while (!kthread_should_stop()) { 3407 pkt_dev = next_to_run(t); 3408 3409 if (unlikely(!pkt_dev && t->control == 0)) { 3410 if (pktgen_exiting) 3411 break; 3412 wait_event_interruptible_timeout(t->queue, 3413 t->control != 0, 3414 HZ/10); 3415 try_to_freeze(); 3416 continue; 3417 } 3418 3419 __set_current_state(TASK_RUNNING); 3420 3421 if (likely(pkt_dev)) { 3422 pktgen_xmit(pkt_dev); 3423 3424 if (need_resched()) 3425 pktgen_resched(pkt_dev); 3426 else 3427 cpu_relax(); 3428 } 3429 3430 if (t->control & T_STOP) { 3431 pktgen_stop(t); 3432 t->control &= ~(T_STOP); 3433 } 3434 3435 if (t->control & T_RUN) { 3436 pktgen_run(t); 3437 t->control &= ~(T_RUN); 3438 } 3439 3440 if (t->control & T_REMDEVALL) { 3441 pktgen_rem_all_ifs(t); 3442 t->control &= ~(T_REMDEVALL); 3443 } 3444 3445 if (t->control & T_REMDEV) { 3446 pktgen_rem_one_if(t); 3447 t->control &= ~(T_REMDEV); 3448 } 3449 3450 try_to_freeze(); 3451 3452 set_current_state(TASK_INTERRUPTIBLE); 3453 } 3454 3455 pr_debug("%s stopping all device\n", t->tsk->comm); 3456 pktgen_stop(t); 3457 3458 pr_debug("%s removing all device\n", t->tsk->comm); 3459 pktgen_rem_all_ifs(t); 3460 3461 pr_debug("%s removing thread\n", t->tsk->comm); 3462 pktgen_rem_thread(t); 3463 3464 /* Wait for kthread_stop */ 3465 while (!kthread_should_stop()) { 3466 set_current_state(TASK_INTERRUPTIBLE); 3467 schedule(); 3468 } 3469 __set_current_state(TASK_RUNNING); 3470 3471 return 0; 3472 } 3473 3474 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3475 const char *ifname, bool exact) 3476 { 3477 struct pktgen_dev *p, *pkt_dev = NULL; 3478 size_t len = strlen(ifname); 3479 3480 if_lock(t); 3481 list_for_each_entry(p, &t->if_list, list) 3482 if (strncmp(p->odevname, ifname, len) == 0) { 3483 if (p->odevname[len]) { 3484 if (exact || p->odevname[len] != '@') 3485 continue; 3486 } 3487 pkt_dev = p; 3488 break; 3489 } 3490 3491 if_unlock(t); 3492 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev); 3493 return pkt_dev; 3494 } 3495 3496 /* 3497 * Adds a dev at front of if_list. 3498 */ 3499 3500 static int add_dev_to_thread(struct pktgen_thread *t, 3501 struct pktgen_dev *pkt_dev) 3502 { 3503 int rv = 0; 3504 3505 if_lock(t); 3506 3507 if (pkt_dev->pg_thread) { 3508 pr_err("ERROR: already assigned to a thread\n"); 3509 rv = -EBUSY; 3510 goto out; 3511 } 3512 3513 list_add(&pkt_dev->list, &t->if_list); 3514 pkt_dev->pg_thread = t; 3515 pkt_dev->running = 0; 3516 3517 out: 3518 if_unlock(t); 3519 return rv; 3520 } 3521 3522 /* Called under thread lock */ 3523 3524 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3525 { 3526 struct pktgen_dev *pkt_dev; 3527 int err; 3528 int node = cpu_to_node(t->cpu); 3529 3530 /* We don't allow a device to be on several threads */ 3531 3532 pkt_dev = __pktgen_NN_threads(ifname, FIND); 3533 if (pkt_dev) { 3534 pr_err("ERROR: interface already used\n"); 3535 return -EBUSY; 3536 } 3537 3538 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); 3539 if (!pkt_dev) 3540 return -ENOMEM; 3541 3542 strcpy(pkt_dev->odevname, ifname); 3543 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state), 3544 node); 3545 if (pkt_dev->flows == NULL) { 3546 kfree(pkt_dev); 3547 return -ENOMEM; 3548 } 3549 3550 pkt_dev->removal_mark = 0; 3551 pkt_dev->min_pkt_size = ETH_ZLEN; 3552 pkt_dev->max_pkt_size = ETH_ZLEN; 3553 pkt_dev->nfrags = 0; 3554 pkt_dev->delay = pg_delay_d; 3555 pkt_dev->count = pg_count_d; 3556 pkt_dev->sofar = 0; 3557 pkt_dev->udp_src_min = 9; /* sink port */ 3558 pkt_dev->udp_src_max = 9; 3559 pkt_dev->udp_dst_min = 9; 3560 pkt_dev->udp_dst_max = 9; 3561 pkt_dev->vlan_p = 0; 3562 pkt_dev->vlan_cfi = 0; 3563 pkt_dev->vlan_id = 0xffff; 3564 pkt_dev->svlan_p = 0; 3565 pkt_dev->svlan_cfi = 0; 3566 pkt_dev->svlan_id = 0xffff; 3567 pkt_dev->node = -1; 3568 3569 err = pktgen_setup_dev(pkt_dev, ifname); 3570 if (err) 3571 goto out1; 3572 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING) 3573 pkt_dev->clone_skb = pg_clone_skb_d; 3574 3575 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir, 3576 &pktgen_if_fops, pkt_dev); 3577 if (!pkt_dev->entry) { 3578 pr_err("cannot create %s/%s procfs entry\n", 3579 PG_PROC_DIR, ifname); 3580 err = -EINVAL; 3581 goto out2; 3582 } 3583 #ifdef CONFIG_XFRM 3584 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3585 pkt_dev->ipsproto = IPPROTO_ESP; 3586 #endif 3587 3588 return add_dev_to_thread(t, pkt_dev); 3589 out2: 3590 dev_put(pkt_dev->odev); 3591 out1: 3592 #ifdef CONFIG_XFRM 3593 free_SAs(pkt_dev); 3594 #endif 3595 vfree(pkt_dev->flows); 3596 kfree(pkt_dev); 3597 return err; 3598 } 3599 3600 static int __init pktgen_create_thread(int cpu) 3601 { 3602 struct pktgen_thread *t; 3603 struct proc_dir_entry *pe; 3604 struct task_struct *p; 3605 3606 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL, 3607 cpu_to_node(cpu)); 3608 if (!t) { 3609 pr_err("ERROR: out of memory, can't create new thread\n"); 3610 return -ENOMEM; 3611 } 3612 3613 spin_lock_init(&t->if_lock); 3614 t->cpu = cpu; 3615 3616 INIT_LIST_HEAD(&t->if_list); 3617 3618 list_add_tail(&t->th_list, &pktgen_threads); 3619 init_completion(&t->start_done); 3620 3621 p = kthread_create_on_node(pktgen_thread_worker, 3622 t, 3623 cpu_to_node(cpu), 3624 "kpktgend_%d", cpu); 3625 if (IS_ERR(p)) { 3626 pr_err("kernel_thread() failed for cpu %d\n", t->cpu); 3627 list_del(&t->th_list); 3628 kfree(t); 3629 return PTR_ERR(p); 3630 } 3631 kthread_bind(p, cpu); 3632 t->tsk = p; 3633 3634 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir, 3635 &pktgen_thread_fops, t); 3636 if (!pe) { 3637 pr_err("cannot create %s/%s procfs entry\n", 3638 PG_PROC_DIR, t->tsk->comm); 3639 kthread_stop(p); 3640 list_del(&t->th_list); 3641 kfree(t); 3642 return -EINVAL; 3643 } 3644 3645 wake_up_process(p); 3646 wait_for_completion(&t->start_done); 3647 3648 return 0; 3649 } 3650 3651 /* 3652 * Removes a device from the thread if_list. 3653 */ 3654 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3655 struct pktgen_dev *pkt_dev) 3656 { 3657 struct list_head *q, *n; 3658 struct pktgen_dev *p; 3659 3660 list_for_each_safe(q, n, &t->if_list) { 3661 p = list_entry(q, struct pktgen_dev, list); 3662 if (p == pkt_dev) 3663 list_del(&p->list); 3664 } 3665 } 3666 3667 static int pktgen_remove_device(struct pktgen_thread *t, 3668 struct pktgen_dev *pkt_dev) 3669 { 3670 3671 pr_debug("remove_device pkt_dev=%p\n", pkt_dev); 3672 3673 if (pkt_dev->running) { 3674 pr_warning("WARNING: trying to remove a running interface, stopping it now\n"); 3675 pktgen_stop_device(pkt_dev); 3676 } 3677 3678 /* Dis-associate from the interface */ 3679 3680 if (pkt_dev->odev) { 3681 dev_put(pkt_dev->odev); 3682 pkt_dev->odev = NULL; 3683 } 3684 3685 /* And update the thread if_list */ 3686 3687 _rem_dev_from_if_list(t, pkt_dev); 3688 3689 if (pkt_dev->entry) 3690 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 3691 3692 #ifdef CONFIG_XFRM 3693 free_SAs(pkt_dev); 3694 #endif 3695 vfree(pkt_dev->flows); 3696 if (pkt_dev->page) 3697 put_page(pkt_dev->page); 3698 kfree(pkt_dev); 3699 return 0; 3700 } 3701 3702 static int __init pg_init(void) 3703 { 3704 int cpu; 3705 struct proc_dir_entry *pe; 3706 int ret = 0; 3707 3708 pr_info("%s", version); 3709 3710 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net); 3711 if (!pg_proc_dir) 3712 return -ENODEV; 3713 3714 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops); 3715 if (pe == NULL) { 3716 pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL); 3717 ret = -EINVAL; 3718 goto remove_dir; 3719 } 3720 3721 register_netdevice_notifier(&pktgen_notifier_block); 3722 3723 for_each_online_cpu(cpu) { 3724 int err; 3725 3726 err = pktgen_create_thread(cpu); 3727 if (err) 3728 pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n", 3729 cpu, err); 3730 } 3731 3732 if (list_empty(&pktgen_threads)) { 3733 pr_err("ERROR: Initialization failed for all threads\n"); 3734 ret = -ENODEV; 3735 goto unregister; 3736 } 3737 3738 return 0; 3739 3740 unregister: 3741 unregister_netdevice_notifier(&pktgen_notifier_block); 3742 remove_proc_entry(PGCTRL, pg_proc_dir); 3743 remove_dir: 3744 proc_net_remove(&init_net, PG_PROC_DIR); 3745 return ret; 3746 } 3747 3748 static void __exit pg_cleanup(void) 3749 { 3750 struct pktgen_thread *t; 3751 struct list_head *q, *n; 3752 LIST_HEAD(list); 3753 3754 /* Stop all interfaces & threads */ 3755 pktgen_exiting = true; 3756 3757 mutex_lock(&pktgen_thread_lock); 3758 list_splice_init(&pktgen_threads, &list); 3759 mutex_unlock(&pktgen_thread_lock); 3760 3761 list_for_each_safe(q, n, &list) { 3762 t = list_entry(q, struct pktgen_thread, th_list); 3763 list_del(&t->th_list); 3764 kthread_stop(t->tsk); 3765 kfree(t); 3766 } 3767 3768 /* Un-register us from receiving netdevice events */ 3769 unregister_netdevice_notifier(&pktgen_notifier_block); 3770 3771 /* Clean up proc file system */ 3772 remove_proc_entry(PGCTRL, pg_proc_dir); 3773 proc_net_remove(&init_net, PG_PROC_DIR); 3774 } 3775 3776 module_init(pg_init); 3777 module_exit(pg_cleanup); 3778 3779 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); 3780 MODULE_DESCRIPTION("Packet Generator tool"); 3781 MODULE_LICENSE("GPL"); 3782 MODULE_VERSION(VERSION); 3783 module_param(pg_count_d, int, 0); 3784 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); 3785 module_param(pg_delay_d, int, 0); 3786 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); 3787 module_param(pg_clone_skb_d, int, 0); 3788 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); 3789 module_param(debug, int, 0); 3790 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); 3791