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; 252 int max_pkt_size; 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 /* Module parameters, defaults. */ 453 static int pg_count_d __read_mostly = 1000; 454 static int pg_delay_d __read_mostly; 455 static int pg_clone_skb_d __read_mostly; 456 static int debug __read_mostly; 457 458 static DEFINE_MUTEX(pktgen_thread_lock); 459 static LIST_HEAD(pktgen_threads); 460 461 static struct notifier_block pktgen_notifier_block = { 462 .notifier_call = pktgen_device_event, 463 }; 464 465 /* 466 * /proc handling functions 467 * 468 */ 469 470 static int pgctrl_show(struct seq_file *seq, void *v) 471 { 472 seq_puts(seq, version); 473 return 0; 474 } 475 476 static ssize_t pgctrl_write(struct file *file, const char __user *buf, 477 size_t count, loff_t *ppos) 478 { 479 int err = 0; 480 char data[128]; 481 482 if (!capable(CAP_NET_ADMIN)) { 483 err = -EPERM; 484 goto out; 485 } 486 487 if (count > sizeof(data)) 488 count = sizeof(data); 489 490 if (copy_from_user(data, buf, count)) { 491 err = -EFAULT; 492 goto out; 493 } 494 data[count - 1] = 0; /* Make string */ 495 496 if (!strcmp(data, "stop")) 497 pktgen_stop_all_threads_ifs(); 498 499 else if (!strcmp(data, "start")) 500 pktgen_run_all_threads(); 501 502 else if (!strcmp(data, "reset")) 503 pktgen_reset_all_threads(); 504 505 else 506 pr_warning("Unknown command: %s\n", data); 507 508 err = count; 509 510 out: 511 return err; 512 } 513 514 static int pgctrl_open(struct inode *inode, struct file *file) 515 { 516 return single_open(file, pgctrl_show, PDE(inode)->data); 517 } 518 519 static const struct file_operations pktgen_fops = { 520 .owner = THIS_MODULE, 521 .open = pgctrl_open, 522 .read = seq_read, 523 .llseek = seq_lseek, 524 .write = pgctrl_write, 525 .release = single_release, 526 }; 527 528 static int pktgen_if_show(struct seq_file *seq, void *v) 529 { 530 const struct pktgen_dev *pkt_dev = seq->private; 531 ktime_t stopped; 532 u64 idle; 533 534 seq_printf(seq, 535 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", 536 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size, 537 pkt_dev->max_pkt_size); 538 539 seq_printf(seq, 540 " frags: %d delay: %llu clone_skb: %d ifname: %s\n", 541 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay, 542 pkt_dev->clone_skb, pkt_dev->odevname); 543 544 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, 545 pkt_dev->lflow); 546 547 seq_printf(seq, 548 " queue_map_min: %u queue_map_max: %u\n", 549 pkt_dev->queue_map_min, 550 pkt_dev->queue_map_max); 551 552 if (pkt_dev->skb_priority) 553 seq_printf(seq, " skb_priority: %u\n", 554 pkt_dev->skb_priority); 555 556 if (pkt_dev->flags & F_IPV6) { 557 seq_printf(seq, 558 " saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n" 559 " daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n", 560 &pkt_dev->in6_saddr, 561 &pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr, 562 &pkt_dev->in6_daddr, 563 &pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr); 564 } else { 565 seq_printf(seq, 566 " dst_min: %s dst_max: %s\n", 567 pkt_dev->dst_min, pkt_dev->dst_max); 568 seq_printf(seq, 569 " src_min: %s src_max: %s\n", 570 pkt_dev->src_min, pkt_dev->src_max); 571 } 572 573 seq_puts(seq, " src_mac: "); 574 575 seq_printf(seq, "%pM ", 576 is_zero_ether_addr(pkt_dev->src_mac) ? 577 pkt_dev->odev->dev_addr : pkt_dev->src_mac); 578 579 seq_printf(seq, "dst_mac: "); 580 seq_printf(seq, "%pM\n", pkt_dev->dst_mac); 581 582 seq_printf(seq, 583 " udp_src_min: %d udp_src_max: %d" 584 " udp_dst_min: %d udp_dst_max: %d\n", 585 pkt_dev->udp_src_min, pkt_dev->udp_src_max, 586 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max); 587 588 seq_printf(seq, 589 " src_mac_count: %d dst_mac_count: %d\n", 590 pkt_dev->src_mac_count, pkt_dev->dst_mac_count); 591 592 if (pkt_dev->nr_labels) { 593 unsigned int i; 594 seq_printf(seq, " mpls: "); 595 for (i = 0; i < pkt_dev->nr_labels; i++) 596 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]), 597 i == pkt_dev->nr_labels-1 ? "\n" : ", "); 598 } 599 600 if (pkt_dev->vlan_id != 0xffff) 601 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n", 602 pkt_dev->vlan_id, pkt_dev->vlan_p, 603 pkt_dev->vlan_cfi); 604 605 if (pkt_dev->svlan_id != 0xffff) 606 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n", 607 pkt_dev->svlan_id, pkt_dev->svlan_p, 608 pkt_dev->svlan_cfi); 609 610 if (pkt_dev->tos) 611 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos); 612 613 if (pkt_dev->traffic_class) 614 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class); 615 616 if (pkt_dev->node >= 0) 617 seq_printf(seq, " node: %d\n", pkt_dev->node); 618 619 seq_printf(seq, " Flags: "); 620 621 if (pkt_dev->flags & F_IPV6) 622 seq_printf(seq, "IPV6 "); 623 624 if (pkt_dev->flags & F_IPSRC_RND) 625 seq_printf(seq, "IPSRC_RND "); 626 627 if (pkt_dev->flags & F_IPDST_RND) 628 seq_printf(seq, "IPDST_RND "); 629 630 if (pkt_dev->flags & F_TXSIZE_RND) 631 seq_printf(seq, "TXSIZE_RND "); 632 633 if (pkt_dev->flags & F_UDPSRC_RND) 634 seq_printf(seq, "UDPSRC_RND "); 635 636 if (pkt_dev->flags & F_UDPDST_RND) 637 seq_printf(seq, "UDPDST_RND "); 638 639 if (pkt_dev->flags & F_MPLS_RND) 640 seq_printf(seq, "MPLS_RND "); 641 642 if (pkt_dev->flags & F_QUEUE_MAP_RND) 643 seq_printf(seq, "QUEUE_MAP_RND "); 644 645 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 646 seq_printf(seq, "QUEUE_MAP_CPU "); 647 648 if (pkt_dev->cflows) { 649 if (pkt_dev->flags & F_FLOW_SEQ) 650 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/ 651 else 652 seq_printf(seq, "FLOW_RND "); 653 } 654 655 #ifdef CONFIG_XFRM 656 if (pkt_dev->flags & F_IPSEC_ON) 657 seq_printf(seq, "IPSEC "); 658 #endif 659 660 if (pkt_dev->flags & F_MACSRC_RND) 661 seq_printf(seq, "MACSRC_RND "); 662 663 if (pkt_dev->flags & F_MACDST_RND) 664 seq_printf(seq, "MACDST_RND "); 665 666 if (pkt_dev->flags & F_VID_RND) 667 seq_printf(seq, "VID_RND "); 668 669 if (pkt_dev->flags & F_SVID_RND) 670 seq_printf(seq, "SVID_RND "); 671 672 if (pkt_dev->flags & F_NODE) 673 seq_printf(seq, "NODE_ALLOC "); 674 675 seq_puts(seq, "\n"); 676 677 /* not really stopped, more like last-running-at */ 678 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at; 679 idle = pkt_dev->idle_acc; 680 do_div(idle, NSEC_PER_USEC); 681 682 seq_printf(seq, 683 "Current:\n pkts-sofar: %llu errors: %llu\n", 684 (unsigned long long)pkt_dev->sofar, 685 (unsigned long long)pkt_dev->errors); 686 687 seq_printf(seq, 688 " started: %lluus stopped: %lluus idle: %lluus\n", 689 (unsigned long long) ktime_to_us(pkt_dev->started_at), 690 (unsigned long long) ktime_to_us(stopped), 691 (unsigned long long) idle); 692 693 seq_printf(seq, 694 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", 695 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, 696 pkt_dev->cur_src_mac_offset); 697 698 if (pkt_dev->flags & F_IPV6) { 699 seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n", 700 &pkt_dev->cur_in6_saddr, 701 &pkt_dev->cur_in6_daddr); 702 } else 703 seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n", 704 &pkt_dev->cur_saddr, &pkt_dev->cur_daddr); 705 706 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n", 707 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); 708 709 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map); 710 711 seq_printf(seq, " flows: %u\n", pkt_dev->nflows); 712 713 if (pkt_dev->result[0]) 714 seq_printf(seq, "Result: %s\n", pkt_dev->result); 715 else 716 seq_printf(seq, "Result: Idle\n"); 717 718 return 0; 719 } 720 721 722 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, 723 __u32 *num) 724 { 725 int i = 0; 726 *num = 0; 727 728 for (; i < maxlen; i++) { 729 int value; 730 char c; 731 *num <<= 4; 732 if (get_user(c, &user_buffer[i])) 733 return -EFAULT; 734 value = hex_to_bin(c); 735 if (value >= 0) 736 *num |= value; 737 else 738 break; 739 } 740 return i; 741 } 742 743 static int count_trail_chars(const char __user * user_buffer, 744 unsigned int maxlen) 745 { 746 int i; 747 748 for (i = 0; i < maxlen; i++) { 749 char c; 750 if (get_user(c, &user_buffer[i])) 751 return -EFAULT; 752 switch (c) { 753 case '\"': 754 case '\n': 755 case '\r': 756 case '\t': 757 case ' ': 758 case '=': 759 break; 760 default: 761 goto done; 762 } 763 } 764 done: 765 return i; 766 } 767 768 static long num_arg(const char __user *user_buffer, unsigned long maxlen, 769 unsigned long *num) 770 { 771 int i; 772 *num = 0; 773 774 for (i = 0; i < maxlen; i++) { 775 char c; 776 if (get_user(c, &user_buffer[i])) 777 return -EFAULT; 778 if ((c >= '0') && (c <= '9')) { 779 *num *= 10; 780 *num += c - '0'; 781 } else 782 break; 783 } 784 return i; 785 } 786 787 static int strn_len(const char __user * user_buffer, unsigned int maxlen) 788 { 789 int i; 790 791 for (i = 0; i < maxlen; i++) { 792 char c; 793 if (get_user(c, &user_buffer[i])) 794 return -EFAULT; 795 switch (c) { 796 case '\"': 797 case '\n': 798 case '\r': 799 case '\t': 800 case ' ': 801 goto done_str; 802 break; 803 default: 804 break; 805 } 806 } 807 done_str: 808 return i; 809 } 810 811 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev) 812 { 813 unsigned int n = 0; 814 char c; 815 ssize_t i = 0; 816 int len; 817 818 pkt_dev->nr_labels = 0; 819 do { 820 __u32 tmp; 821 len = hex32_arg(&buffer[i], 8, &tmp); 822 if (len <= 0) 823 return len; 824 pkt_dev->labels[n] = htonl(tmp); 825 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM) 826 pkt_dev->flags |= F_MPLS_RND; 827 i += len; 828 if (get_user(c, &buffer[i])) 829 return -EFAULT; 830 i++; 831 n++; 832 if (n >= MAX_MPLS_LABELS) 833 return -E2BIG; 834 } while (c == ','); 835 836 pkt_dev->nr_labels = n; 837 return i; 838 } 839 840 static ssize_t pktgen_if_write(struct file *file, 841 const char __user * user_buffer, size_t count, 842 loff_t * offset) 843 { 844 struct seq_file *seq = file->private_data; 845 struct pktgen_dev *pkt_dev = seq->private; 846 int i, max, len; 847 char name[16], valstr[32]; 848 unsigned long value = 0; 849 char *pg_result = NULL; 850 int tmp = 0; 851 char buf[128]; 852 853 pg_result = &(pkt_dev->result[0]); 854 855 if (count < 1) { 856 pr_warning("wrong command format\n"); 857 return -EINVAL; 858 } 859 860 max = count; 861 tmp = count_trail_chars(user_buffer, max); 862 if (tmp < 0) { 863 pr_warning("illegal format\n"); 864 return tmp; 865 } 866 i = tmp; 867 868 /* Read variable name */ 869 870 len = strn_len(&user_buffer[i], sizeof(name) - 1); 871 if (len < 0) 872 return len; 873 874 memset(name, 0, sizeof(name)); 875 if (copy_from_user(name, &user_buffer[i], len)) 876 return -EFAULT; 877 i += len; 878 879 max = count - i; 880 len = count_trail_chars(&user_buffer[i], max); 881 if (len < 0) 882 return len; 883 884 i += len; 885 886 if (debug) { 887 size_t copy = min_t(size_t, count, 1023); 888 char tb[copy + 1]; 889 if (copy_from_user(tb, user_buffer, copy)) 890 return -EFAULT; 891 tb[copy] = 0; 892 pr_debug("%s,%lu buffer -:%s:-\n", 893 name, (unsigned long)count, tb); 894 } 895 896 if (!strcmp(name, "min_pkt_size")) { 897 len = num_arg(&user_buffer[i], 10, &value); 898 if (len < 0) 899 return len; 900 901 i += len; 902 if (value < 14 + 20 + 8) 903 value = 14 + 20 + 8; 904 if (value != pkt_dev->min_pkt_size) { 905 pkt_dev->min_pkt_size = value; 906 pkt_dev->cur_pkt_size = value; 907 } 908 sprintf(pg_result, "OK: min_pkt_size=%u", 909 pkt_dev->min_pkt_size); 910 return count; 911 } 912 913 if (!strcmp(name, "max_pkt_size")) { 914 len = num_arg(&user_buffer[i], 10, &value); 915 if (len < 0) 916 return len; 917 918 i += len; 919 if (value < 14 + 20 + 8) 920 value = 14 + 20 + 8; 921 if (value != pkt_dev->max_pkt_size) { 922 pkt_dev->max_pkt_size = value; 923 pkt_dev->cur_pkt_size = value; 924 } 925 sprintf(pg_result, "OK: max_pkt_size=%u", 926 pkt_dev->max_pkt_size); 927 return count; 928 } 929 930 /* Shortcut for min = max */ 931 932 if (!strcmp(name, "pkt_size")) { 933 len = num_arg(&user_buffer[i], 10, &value); 934 if (len < 0) 935 return len; 936 937 i += len; 938 if (value < 14 + 20 + 8) 939 value = 14 + 20 + 8; 940 if (value != pkt_dev->min_pkt_size) { 941 pkt_dev->min_pkt_size = value; 942 pkt_dev->max_pkt_size = value; 943 pkt_dev->cur_pkt_size = value; 944 } 945 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); 946 return count; 947 } 948 949 if (!strcmp(name, "debug")) { 950 len = num_arg(&user_buffer[i], 10, &value); 951 if (len < 0) 952 return len; 953 954 i += len; 955 debug = value; 956 sprintf(pg_result, "OK: debug=%u", debug); 957 return count; 958 } 959 960 if (!strcmp(name, "frags")) { 961 len = num_arg(&user_buffer[i], 10, &value); 962 if (len < 0) 963 return len; 964 965 i += len; 966 pkt_dev->nfrags = value; 967 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); 968 return count; 969 } 970 if (!strcmp(name, "delay")) { 971 len = num_arg(&user_buffer[i], 10, &value); 972 if (len < 0) 973 return len; 974 975 i += len; 976 if (value == 0x7FFFFFFF) 977 pkt_dev->delay = ULLONG_MAX; 978 else 979 pkt_dev->delay = (u64)value; 980 981 sprintf(pg_result, "OK: delay=%llu", 982 (unsigned long long) pkt_dev->delay); 983 return count; 984 } 985 if (!strcmp(name, "rate")) { 986 len = num_arg(&user_buffer[i], 10, &value); 987 if (len < 0) 988 return len; 989 990 i += len; 991 if (!value) 992 return len; 993 pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value; 994 if (debug) 995 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 996 997 sprintf(pg_result, "OK: rate=%lu", value); 998 return count; 999 } 1000 if (!strcmp(name, "ratep")) { 1001 len = num_arg(&user_buffer[i], 10, &value); 1002 if (len < 0) 1003 return len; 1004 1005 i += len; 1006 if (!value) 1007 return len; 1008 pkt_dev->delay = NSEC_PER_SEC/value; 1009 if (debug) 1010 pr_info("Delay set at: %llu ns\n", pkt_dev->delay); 1011 1012 sprintf(pg_result, "OK: rate=%lu", value); 1013 return count; 1014 } 1015 if (!strcmp(name, "udp_src_min")) { 1016 len = num_arg(&user_buffer[i], 10, &value); 1017 if (len < 0) 1018 return len; 1019 1020 i += len; 1021 if (value != pkt_dev->udp_src_min) { 1022 pkt_dev->udp_src_min = value; 1023 pkt_dev->cur_udp_src = value; 1024 } 1025 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); 1026 return count; 1027 } 1028 if (!strcmp(name, "udp_dst_min")) { 1029 len = num_arg(&user_buffer[i], 10, &value); 1030 if (len < 0) 1031 return len; 1032 1033 i += len; 1034 if (value != pkt_dev->udp_dst_min) { 1035 pkt_dev->udp_dst_min = value; 1036 pkt_dev->cur_udp_dst = value; 1037 } 1038 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); 1039 return count; 1040 } 1041 if (!strcmp(name, "udp_src_max")) { 1042 len = num_arg(&user_buffer[i], 10, &value); 1043 if (len < 0) 1044 return len; 1045 1046 i += len; 1047 if (value != pkt_dev->udp_src_max) { 1048 pkt_dev->udp_src_max = value; 1049 pkt_dev->cur_udp_src = value; 1050 } 1051 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); 1052 return count; 1053 } 1054 if (!strcmp(name, "udp_dst_max")) { 1055 len = num_arg(&user_buffer[i], 10, &value); 1056 if (len < 0) 1057 return len; 1058 1059 i += len; 1060 if (value != pkt_dev->udp_dst_max) { 1061 pkt_dev->udp_dst_max = value; 1062 pkt_dev->cur_udp_dst = value; 1063 } 1064 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); 1065 return count; 1066 } 1067 if (!strcmp(name, "clone_skb")) { 1068 len = num_arg(&user_buffer[i], 10, &value); 1069 if (len < 0) 1070 return len; 1071 if ((value > 0) && 1072 (!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING))) 1073 return -ENOTSUPP; 1074 i += len; 1075 pkt_dev->clone_skb = value; 1076 1077 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); 1078 return count; 1079 } 1080 if (!strcmp(name, "count")) { 1081 len = num_arg(&user_buffer[i], 10, &value); 1082 if (len < 0) 1083 return len; 1084 1085 i += len; 1086 pkt_dev->count = value; 1087 sprintf(pg_result, "OK: count=%llu", 1088 (unsigned long long)pkt_dev->count); 1089 return count; 1090 } 1091 if (!strcmp(name, "src_mac_count")) { 1092 len = num_arg(&user_buffer[i], 10, &value); 1093 if (len < 0) 1094 return len; 1095 1096 i += len; 1097 if (pkt_dev->src_mac_count != value) { 1098 pkt_dev->src_mac_count = value; 1099 pkt_dev->cur_src_mac_offset = 0; 1100 } 1101 sprintf(pg_result, "OK: src_mac_count=%d", 1102 pkt_dev->src_mac_count); 1103 return count; 1104 } 1105 if (!strcmp(name, "dst_mac_count")) { 1106 len = num_arg(&user_buffer[i], 10, &value); 1107 if (len < 0) 1108 return len; 1109 1110 i += len; 1111 if (pkt_dev->dst_mac_count != value) { 1112 pkt_dev->dst_mac_count = value; 1113 pkt_dev->cur_dst_mac_offset = 0; 1114 } 1115 sprintf(pg_result, "OK: dst_mac_count=%d", 1116 pkt_dev->dst_mac_count); 1117 return count; 1118 } 1119 if (!strcmp(name, "node")) { 1120 len = num_arg(&user_buffer[i], 10, &value); 1121 if (len < 0) 1122 return len; 1123 1124 i += len; 1125 1126 if (node_possible(value)) { 1127 pkt_dev->node = value; 1128 sprintf(pg_result, "OK: node=%d", pkt_dev->node); 1129 if (pkt_dev->page) { 1130 put_page(pkt_dev->page); 1131 pkt_dev->page = NULL; 1132 } 1133 } 1134 else 1135 sprintf(pg_result, "ERROR: node not possible"); 1136 return count; 1137 } 1138 if (!strcmp(name, "flag")) { 1139 char f[32]; 1140 memset(f, 0, 32); 1141 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1142 if (len < 0) 1143 return len; 1144 1145 if (copy_from_user(f, &user_buffer[i], len)) 1146 return -EFAULT; 1147 i += len; 1148 if (strcmp(f, "IPSRC_RND") == 0) 1149 pkt_dev->flags |= F_IPSRC_RND; 1150 1151 else if (strcmp(f, "!IPSRC_RND") == 0) 1152 pkt_dev->flags &= ~F_IPSRC_RND; 1153 1154 else if (strcmp(f, "TXSIZE_RND") == 0) 1155 pkt_dev->flags |= F_TXSIZE_RND; 1156 1157 else if (strcmp(f, "!TXSIZE_RND") == 0) 1158 pkt_dev->flags &= ~F_TXSIZE_RND; 1159 1160 else if (strcmp(f, "IPDST_RND") == 0) 1161 pkt_dev->flags |= F_IPDST_RND; 1162 1163 else if (strcmp(f, "!IPDST_RND") == 0) 1164 pkt_dev->flags &= ~F_IPDST_RND; 1165 1166 else if (strcmp(f, "UDPSRC_RND") == 0) 1167 pkt_dev->flags |= F_UDPSRC_RND; 1168 1169 else if (strcmp(f, "!UDPSRC_RND") == 0) 1170 pkt_dev->flags &= ~F_UDPSRC_RND; 1171 1172 else if (strcmp(f, "UDPDST_RND") == 0) 1173 pkt_dev->flags |= F_UDPDST_RND; 1174 1175 else if (strcmp(f, "!UDPDST_RND") == 0) 1176 pkt_dev->flags &= ~F_UDPDST_RND; 1177 1178 else if (strcmp(f, "MACSRC_RND") == 0) 1179 pkt_dev->flags |= F_MACSRC_RND; 1180 1181 else if (strcmp(f, "!MACSRC_RND") == 0) 1182 pkt_dev->flags &= ~F_MACSRC_RND; 1183 1184 else if (strcmp(f, "MACDST_RND") == 0) 1185 pkt_dev->flags |= F_MACDST_RND; 1186 1187 else if (strcmp(f, "!MACDST_RND") == 0) 1188 pkt_dev->flags &= ~F_MACDST_RND; 1189 1190 else if (strcmp(f, "MPLS_RND") == 0) 1191 pkt_dev->flags |= F_MPLS_RND; 1192 1193 else if (strcmp(f, "!MPLS_RND") == 0) 1194 pkt_dev->flags &= ~F_MPLS_RND; 1195 1196 else if (strcmp(f, "VID_RND") == 0) 1197 pkt_dev->flags |= F_VID_RND; 1198 1199 else if (strcmp(f, "!VID_RND") == 0) 1200 pkt_dev->flags &= ~F_VID_RND; 1201 1202 else if (strcmp(f, "SVID_RND") == 0) 1203 pkt_dev->flags |= F_SVID_RND; 1204 1205 else if (strcmp(f, "!SVID_RND") == 0) 1206 pkt_dev->flags &= ~F_SVID_RND; 1207 1208 else if (strcmp(f, "FLOW_SEQ") == 0) 1209 pkt_dev->flags |= F_FLOW_SEQ; 1210 1211 else if (strcmp(f, "QUEUE_MAP_RND") == 0) 1212 pkt_dev->flags |= F_QUEUE_MAP_RND; 1213 1214 else if (strcmp(f, "!QUEUE_MAP_RND") == 0) 1215 pkt_dev->flags &= ~F_QUEUE_MAP_RND; 1216 1217 else if (strcmp(f, "QUEUE_MAP_CPU") == 0) 1218 pkt_dev->flags |= F_QUEUE_MAP_CPU; 1219 1220 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0) 1221 pkt_dev->flags &= ~F_QUEUE_MAP_CPU; 1222 #ifdef CONFIG_XFRM 1223 else if (strcmp(f, "IPSEC") == 0) 1224 pkt_dev->flags |= F_IPSEC_ON; 1225 #endif 1226 1227 else if (strcmp(f, "!IPV6") == 0) 1228 pkt_dev->flags &= ~F_IPV6; 1229 1230 else if (strcmp(f, "NODE_ALLOC") == 0) 1231 pkt_dev->flags |= F_NODE; 1232 1233 else if (strcmp(f, "!NODE_ALLOC") == 0) 1234 pkt_dev->flags &= ~F_NODE; 1235 1236 else { 1237 sprintf(pg_result, 1238 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", 1239 f, 1240 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, " 1241 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n"); 1242 return count; 1243 } 1244 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); 1245 return count; 1246 } 1247 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { 1248 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); 1249 if (len < 0) 1250 return len; 1251 1252 if (copy_from_user(buf, &user_buffer[i], len)) 1253 return -EFAULT; 1254 buf[len] = 0; 1255 if (strcmp(buf, pkt_dev->dst_min) != 0) { 1256 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); 1257 strncpy(pkt_dev->dst_min, buf, len); 1258 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 1259 pkt_dev->cur_daddr = pkt_dev->daddr_min; 1260 } 1261 if (debug) 1262 pr_debug("dst_min set to: %s\n", pkt_dev->dst_min); 1263 i += len; 1264 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); 1265 return count; 1266 } 1267 if (!strcmp(name, "dst_max")) { 1268 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); 1269 if (len < 0) 1270 return len; 1271 1272 1273 if (copy_from_user(buf, &user_buffer[i], len)) 1274 return -EFAULT; 1275 1276 buf[len] = 0; 1277 if (strcmp(buf, pkt_dev->dst_max) != 0) { 1278 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); 1279 strncpy(pkt_dev->dst_max, buf, len); 1280 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 1281 pkt_dev->cur_daddr = pkt_dev->daddr_max; 1282 } 1283 if (debug) 1284 pr_debug("dst_max set to: %s\n", pkt_dev->dst_max); 1285 i += len; 1286 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); 1287 return count; 1288 } 1289 if (!strcmp(name, "dst6")) { 1290 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1291 if (len < 0) 1292 return len; 1293 1294 pkt_dev->flags |= F_IPV6; 1295 1296 if (copy_from_user(buf, &user_buffer[i], len)) 1297 return -EFAULT; 1298 buf[len] = 0; 1299 1300 in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL); 1301 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr); 1302 1303 pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr; 1304 1305 if (debug) 1306 pr_debug("dst6 set to: %s\n", buf); 1307 1308 i += len; 1309 sprintf(pg_result, "OK: dst6=%s", buf); 1310 return count; 1311 } 1312 if (!strcmp(name, "dst6_min")) { 1313 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1314 if (len < 0) 1315 return len; 1316 1317 pkt_dev->flags |= F_IPV6; 1318 1319 if (copy_from_user(buf, &user_buffer[i], len)) 1320 return -EFAULT; 1321 buf[len] = 0; 1322 1323 in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL); 1324 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr); 1325 1326 pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr; 1327 if (debug) 1328 pr_debug("dst6_min set to: %s\n", buf); 1329 1330 i += len; 1331 sprintf(pg_result, "OK: dst6_min=%s", buf); 1332 return count; 1333 } 1334 if (!strcmp(name, "dst6_max")) { 1335 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1336 if (len < 0) 1337 return len; 1338 1339 pkt_dev->flags |= F_IPV6; 1340 1341 if (copy_from_user(buf, &user_buffer[i], len)) 1342 return -EFAULT; 1343 buf[len] = 0; 1344 1345 in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL); 1346 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr); 1347 1348 if (debug) 1349 pr_debug("dst6_max set to: %s\n", buf); 1350 1351 i += len; 1352 sprintf(pg_result, "OK: dst6_max=%s", buf); 1353 return count; 1354 } 1355 if (!strcmp(name, "src6")) { 1356 len = strn_len(&user_buffer[i], sizeof(buf) - 1); 1357 if (len < 0) 1358 return len; 1359 1360 pkt_dev->flags |= F_IPV6; 1361 1362 if (copy_from_user(buf, &user_buffer[i], len)) 1363 return -EFAULT; 1364 buf[len] = 0; 1365 1366 in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL); 1367 snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr); 1368 1369 pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr; 1370 1371 if (debug) 1372 pr_debug("src6 set to: %s\n", buf); 1373 1374 i += len; 1375 sprintf(pg_result, "OK: src6=%s", buf); 1376 return count; 1377 } 1378 if (!strcmp(name, "src_min")) { 1379 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); 1380 if (len < 0) 1381 return len; 1382 1383 if (copy_from_user(buf, &user_buffer[i], len)) 1384 return -EFAULT; 1385 buf[len] = 0; 1386 if (strcmp(buf, pkt_dev->src_min) != 0) { 1387 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); 1388 strncpy(pkt_dev->src_min, buf, len); 1389 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 1390 pkt_dev->cur_saddr = pkt_dev->saddr_min; 1391 } 1392 if (debug) 1393 pr_debug("src_min set to: %s\n", pkt_dev->src_min); 1394 i += len; 1395 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); 1396 return count; 1397 } 1398 if (!strcmp(name, "src_max")) { 1399 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); 1400 if (len < 0) 1401 return len; 1402 1403 if (copy_from_user(buf, &user_buffer[i], len)) 1404 return -EFAULT; 1405 buf[len] = 0; 1406 if (strcmp(buf, pkt_dev->src_max) != 0) { 1407 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); 1408 strncpy(pkt_dev->src_max, buf, len); 1409 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 1410 pkt_dev->cur_saddr = pkt_dev->saddr_max; 1411 } 1412 if (debug) 1413 pr_debug("src_max set to: %s\n", pkt_dev->src_max); 1414 i += len; 1415 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); 1416 return count; 1417 } 1418 if (!strcmp(name, "dst_mac")) { 1419 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1420 if (len < 0) 1421 return len; 1422 1423 memset(valstr, 0, sizeof(valstr)); 1424 if (copy_from_user(valstr, &user_buffer[i], len)) 1425 return -EFAULT; 1426 1427 if (!mac_pton(valstr, pkt_dev->dst_mac)) 1428 return -EINVAL; 1429 /* Set up Dest MAC */ 1430 memcpy(&pkt_dev->hh[0], pkt_dev->dst_mac, ETH_ALEN); 1431 1432 sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac); 1433 return count; 1434 } 1435 if (!strcmp(name, "src_mac")) { 1436 len = strn_len(&user_buffer[i], sizeof(valstr) - 1); 1437 if (len < 0) 1438 return len; 1439 1440 memset(valstr, 0, sizeof(valstr)); 1441 if (copy_from_user(valstr, &user_buffer[i], len)) 1442 return -EFAULT; 1443 1444 if (!mac_pton(valstr, pkt_dev->src_mac)) 1445 return -EINVAL; 1446 /* Set up Src MAC */ 1447 memcpy(&pkt_dev->hh[6], pkt_dev->src_mac, ETH_ALEN); 1448 1449 sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac); 1450 return count; 1451 } 1452 1453 if (!strcmp(name, "clear_counters")) { 1454 pktgen_clear_counters(pkt_dev); 1455 sprintf(pg_result, "OK: Clearing counters.\n"); 1456 return count; 1457 } 1458 1459 if (!strcmp(name, "flows")) { 1460 len = num_arg(&user_buffer[i], 10, &value); 1461 if (len < 0) 1462 return len; 1463 1464 i += len; 1465 if (value > MAX_CFLOWS) 1466 value = MAX_CFLOWS; 1467 1468 pkt_dev->cflows = value; 1469 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); 1470 return count; 1471 } 1472 1473 if (!strcmp(name, "flowlen")) { 1474 len = num_arg(&user_buffer[i], 10, &value); 1475 if (len < 0) 1476 return len; 1477 1478 i += len; 1479 pkt_dev->lflow = value; 1480 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); 1481 return count; 1482 } 1483 1484 if (!strcmp(name, "queue_map_min")) { 1485 len = num_arg(&user_buffer[i], 5, &value); 1486 if (len < 0) 1487 return len; 1488 1489 i += len; 1490 pkt_dev->queue_map_min = value; 1491 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min); 1492 return count; 1493 } 1494 1495 if (!strcmp(name, "queue_map_max")) { 1496 len = num_arg(&user_buffer[i], 5, &value); 1497 if (len < 0) 1498 return len; 1499 1500 i += len; 1501 pkt_dev->queue_map_max = value; 1502 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max); 1503 return count; 1504 } 1505 1506 if (!strcmp(name, "mpls")) { 1507 unsigned int n, cnt; 1508 1509 len = get_labels(&user_buffer[i], pkt_dev); 1510 if (len < 0) 1511 return len; 1512 i += len; 1513 cnt = sprintf(pg_result, "OK: mpls="); 1514 for (n = 0; n < pkt_dev->nr_labels; n++) 1515 cnt += sprintf(pg_result + cnt, 1516 "%08x%s", ntohl(pkt_dev->labels[n]), 1517 n == pkt_dev->nr_labels-1 ? "" : ","); 1518 1519 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) { 1520 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1521 pkt_dev->svlan_id = 0xffff; 1522 1523 if (debug) 1524 pr_debug("VLAN/SVLAN auto turned off\n"); 1525 } 1526 return count; 1527 } 1528 1529 if (!strcmp(name, "vlan_id")) { 1530 len = num_arg(&user_buffer[i], 4, &value); 1531 if (len < 0) 1532 return len; 1533 1534 i += len; 1535 if (value <= 4095) { 1536 pkt_dev->vlan_id = value; /* turn on VLAN */ 1537 1538 if (debug) 1539 pr_debug("VLAN turned on\n"); 1540 1541 if (debug && pkt_dev->nr_labels) 1542 pr_debug("MPLS auto turned off\n"); 1543 1544 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1545 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id); 1546 } else { 1547 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1548 pkt_dev->svlan_id = 0xffff; 1549 1550 if (debug) 1551 pr_debug("VLAN/SVLAN turned off\n"); 1552 } 1553 return count; 1554 } 1555 1556 if (!strcmp(name, "vlan_p")) { 1557 len = num_arg(&user_buffer[i], 1, &value); 1558 if (len < 0) 1559 return len; 1560 1561 i += len; 1562 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) { 1563 pkt_dev->vlan_p = value; 1564 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p); 1565 } else { 1566 sprintf(pg_result, "ERROR: vlan_p must be 0-7"); 1567 } 1568 return count; 1569 } 1570 1571 if (!strcmp(name, "vlan_cfi")) { 1572 len = num_arg(&user_buffer[i], 1, &value); 1573 if (len < 0) 1574 return len; 1575 1576 i += len; 1577 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) { 1578 pkt_dev->vlan_cfi = value; 1579 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi); 1580 } else { 1581 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1"); 1582 } 1583 return count; 1584 } 1585 1586 if (!strcmp(name, "svlan_id")) { 1587 len = num_arg(&user_buffer[i], 4, &value); 1588 if (len < 0) 1589 return len; 1590 1591 i += len; 1592 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) { 1593 pkt_dev->svlan_id = value; /* turn on SVLAN */ 1594 1595 if (debug) 1596 pr_debug("SVLAN turned on\n"); 1597 1598 if (debug && pkt_dev->nr_labels) 1599 pr_debug("MPLS auto turned off\n"); 1600 1601 pkt_dev->nr_labels = 0; /* turn off MPLS */ 1602 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id); 1603 } else { 1604 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */ 1605 pkt_dev->svlan_id = 0xffff; 1606 1607 if (debug) 1608 pr_debug("VLAN/SVLAN turned off\n"); 1609 } 1610 return count; 1611 } 1612 1613 if (!strcmp(name, "svlan_p")) { 1614 len = num_arg(&user_buffer[i], 1, &value); 1615 if (len < 0) 1616 return len; 1617 1618 i += len; 1619 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) { 1620 pkt_dev->svlan_p = value; 1621 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p); 1622 } else { 1623 sprintf(pg_result, "ERROR: svlan_p must be 0-7"); 1624 } 1625 return count; 1626 } 1627 1628 if (!strcmp(name, "svlan_cfi")) { 1629 len = num_arg(&user_buffer[i], 1, &value); 1630 if (len < 0) 1631 return len; 1632 1633 i += len; 1634 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) { 1635 pkt_dev->svlan_cfi = value; 1636 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi); 1637 } else { 1638 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1"); 1639 } 1640 return count; 1641 } 1642 1643 if (!strcmp(name, "tos")) { 1644 __u32 tmp_value = 0; 1645 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1646 if (len < 0) 1647 return len; 1648 1649 i += len; 1650 if (len == 2) { 1651 pkt_dev->tos = tmp_value; 1652 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos); 1653 } else { 1654 sprintf(pg_result, "ERROR: tos must be 00-ff"); 1655 } 1656 return count; 1657 } 1658 1659 if (!strcmp(name, "traffic_class")) { 1660 __u32 tmp_value = 0; 1661 len = hex32_arg(&user_buffer[i], 2, &tmp_value); 1662 if (len < 0) 1663 return len; 1664 1665 i += len; 1666 if (len == 2) { 1667 pkt_dev->traffic_class = tmp_value; 1668 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class); 1669 } else { 1670 sprintf(pg_result, "ERROR: traffic_class must be 00-ff"); 1671 } 1672 return count; 1673 } 1674 1675 if (!strcmp(name, "skb_priority")) { 1676 len = num_arg(&user_buffer[i], 9, &value); 1677 if (len < 0) 1678 return len; 1679 1680 i += len; 1681 pkt_dev->skb_priority = value; 1682 sprintf(pg_result, "OK: skb_priority=%i", 1683 pkt_dev->skb_priority); 1684 return count; 1685 } 1686 1687 sprintf(pkt_dev->result, "No such parameter \"%s\"", name); 1688 return -EINVAL; 1689 } 1690 1691 static int pktgen_if_open(struct inode *inode, struct file *file) 1692 { 1693 return single_open(file, pktgen_if_show, PDE(inode)->data); 1694 } 1695 1696 static const struct file_operations pktgen_if_fops = { 1697 .owner = THIS_MODULE, 1698 .open = pktgen_if_open, 1699 .read = seq_read, 1700 .llseek = seq_lseek, 1701 .write = pktgen_if_write, 1702 .release = single_release, 1703 }; 1704 1705 static int pktgen_thread_show(struct seq_file *seq, void *v) 1706 { 1707 struct pktgen_thread *t = seq->private; 1708 const struct pktgen_dev *pkt_dev; 1709 1710 BUG_ON(!t); 1711 1712 seq_printf(seq, "Running: "); 1713 1714 if_lock(t); 1715 list_for_each_entry(pkt_dev, &t->if_list, list) 1716 if (pkt_dev->running) 1717 seq_printf(seq, "%s ", pkt_dev->odevname); 1718 1719 seq_printf(seq, "\nStopped: "); 1720 1721 list_for_each_entry(pkt_dev, &t->if_list, list) 1722 if (!pkt_dev->running) 1723 seq_printf(seq, "%s ", pkt_dev->odevname); 1724 1725 if (t->result[0]) 1726 seq_printf(seq, "\nResult: %s\n", t->result); 1727 else 1728 seq_printf(seq, "\nResult: NA\n"); 1729 1730 if_unlock(t); 1731 1732 return 0; 1733 } 1734 1735 static ssize_t pktgen_thread_write(struct file *file, 1736 const char __user * user_buffer, 1737 size_t count, loff_t * offset) 1738 { 1739 struct seq_file *seq = file->private_data; 1740 struct pktgen_thread *t = seq->private; 1741 int i, max, len, ret; 1742 char name[40]; 1743 char *pg_result; 1744 1745 if (count < 1) { 1746 // sprintf(pg_result, "Wrong command format"); 1747 return -EINVAL; 1748 } 1749 1750 max = count; 1751 len = count_trail_chars(user_buffer, max); 1752 if (len < 0) 1753 return len; 1754 1755 i = len; 1756 1757 /* Read variable name */ 1758 1759 len = strn_len(&user_buffer[i], sizeof(name) - 1); 1760 if (len < 0) 1761 return len; 1762 1763 memset(name, 0, sizeof(name)); 1764 if (copy_from_user(name, &user_buffer[i], len)) 1765 return -EFAULT; 1766 i += len; 1767 1768 max = count - i; 1769 len = count_trail_chars(&user_buffer[i], max); 1770 if (len < 0) 1771 return len; 1772 1773 i += len; 1774 1775 if (debug) 1776 pr_debug("t=%s, count=%lu\n", name, (unsigned long)count); 1777 1778 if (!t) { 1779 pr_err("ERROR: No thread\n"); 1780 ret = -EINVAL; 1781 goto out; 1782 } 1783 1784 pg_result = &(t->result[0]); 1785 1786 if (!strcmp(name, "add_device")) { 1787 char f[32]; 1788 memset(f, 0, 32); 1789 len = strn_len(&user_buffer[i], sizeof(f) - 1); 1790 if (len < 0) { 1791 ret = len; 1792 goto out; 1793 } 1794 if (copy_from_user(f, &user_buffer[i], len)) 1795 return -EFAULT; 1796 i += len; 1797 mutex_lock(&pktgen_thread_lock); 1798 pktgen_add_device(t, f); 1799 mutex_unlock(&pktgen_thread_lock); 1800 ret = count; 1801 sprintf(pg_result, "OK: add_device=%s", f); 1802 goto out; 1803 } 1804 1805 if (!strcmp(name, "rem_device_all")) { 1806 mutex_lock(&pktgen_thread_lock); 1807 t->control |= T_REMDEVALL; 1808 mutex_unlock(&pktgen_thread_lock); 1809 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ 1810 ret = count; 1811 sprintf(pg_result, "OK: rem_device_all"); 1812 goto out; 1813 } 1814 1815 if (!strcmp(name, "max_before_softirq")) { 1816 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use"); 1817 ret = count; 1818 goto out; 1819 } 1820 1821 ret = -EINVAL; 1822 out: 1823 return ret; 1824 } 1825 1826 static int pktgen_thread_open(struct inode *inode, struct file *file) 1827 { 1828 return single_open(file, pktgen_thread_show, PDE(inode)->data); 1829 } 1830 1831 static const struct file_operations pktgen_thread_fops = { 1832 .owner = THIS_MODULE, 1833 .open = pktgen_thread_open, 1834 .read = seq_read, 1835 .llseek = seq_lseek, 1836 .write = pktgen_thread_write, 1837 .release = single_release, 1838 }; 1839 1840 /* Think find or remove for NN */ 1841 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove) 1842 { 1843 struct pktgen_thread *t; 1844 struct pktgen_dev *pkt_dev = NULL; 1845 bool exact = (remove == FIND); 1846 1847 list_for_each_entry(t, &pktgen_threads, th_list) { 1848 pkt_dev = pktgen_find_dev(t, ifname, exact); 1849 if (pkt_dev) { 1850 if (remove) { 1851 if_lock(t); 1852 pkt_dev->removal_mark = 1; 1853 t->control |= T_REMDEV; 1854 if_unlock(t); 1855 } 1856 break; 1857 } 1858 } 1859 return pkt_dev; 1860 } 1861 1862 /* 1863 * mark a device for removal 1864 */ 1865 static void pktgen_mark_device(const char *ifname) 1866 { 1867 struct pktgen_dev *pkt_dev = NULL; 1868 const int max_tries = 10, msec_per_try = 125; 1869 int i = 0; 1870 1871 mutex_lock(&pktgen_thread_lock); 1872 pr_debug("%s: marking %s for removal\n", __func__, ifname); 1873 1874 while (1) { 1875 1876 pkt_dev = __pktgen_NN_threads(ifname, REMOVE); 1877 if (pkt_dev == NULL) 1878 break; /* success */ 1879 1880 mutex_unlock(&pktgen_thread_lock); 1881 pr_debug("%s: waiting for %s to disappear....\n", 1882 __func__, ifname); 1883 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); 1884 mutex_lock(&pktgen_thread_lock); 1885 1886 if (++i >= max_tries) { 1887 pr_err("%s: timed out after waiting %d msec for device %s to be removed\n", 1888 __func__, msec_per_try * i, ifname); 1889 break; 1890 } 1891 1892 } 1893 1894 mutex_unlock(&pktgen_thread_lock); 1895 } 1896 1897 static void pktgen_change_name(struct net_device *dev) 1898 { 1899 struct pktgen_thread *t; 1900 1901 list_for_each_entry(t, &pktgen_threads, th_list) { 1902 struct pktgen_dev *pkt_dev; 1903 1904 list_for_each_entry(pkt_dev, &t->if_list, list) { 1905 if (pkt_dev->odev != dev) 1906 continue; 1907 1908 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 1909 1910 pkt_dev->entry = proc_create_data(dev->name, 0600, 1911 pg_proc_dir, 1912 &pktgen_if_fops, 1913 pkt_dev); 1914 if (!pkt_dev->entry) 1915 pr_err("can't move proc entry for '%s'\n", 1916 dev->name); 1917 break; 1918 } 1919 } 1920 } 1921 1922 static int pktgen_device_event(struct notifier_block *unused, 1923 unsigned long event, void *ptr) 1924 { 1925 struct net_device *dev = ptr; 1926 1927 if (!net_eq(dev_net(dev), &init_net) || pktgen_exiting) 1928 return NOTIFY_DONE; 1929 1930 /* It is OK that we do not hold the group lock right now, 1931 * as we run under the RTNL lock. 1932 */ 1933 1934 switch (event) { 1935 case NETDEV_CHANGENAME: 1936 pktgen_change_name(dev); 1937 break; 1938 1939 case NETDEV_UNREGISTER: 1940 pktgen_mark_device(dev->name); 1941 break; 1942 } 1943 1944 return NOTIFY_DONE; 1945 } 1946 1947 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev, 1948 const char *ifname) 1949 { 1950 char b[IFNAMSIZ+5]; 1951 int i; 1952 1953 for (i = 0; ifname[i] != '@'; i++) { 1954 if (i == IFNAMSIZ) 1955 break; 1956 1957 b[i] = ifname[i]; 1958 } 1959 b[i] = 0; 1960 1961 return dev_get_by_name(&init_net, b); 1962 } 1963 1964 1965 /* Associate pktgen_dev with a device. */ 1966 1967 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname) 1968 { 1969 struct net_device *odev; 1970 int err; 1971 1972 /* Clean old setups */ 1973 if (pkt_dev->odev) { 1974 dev_put(pkt_dev->odev); 1975 pkt_dev->odev = NULL; 1976 } 1977 1978 odev = pktgen_dev_get_by_name(pkt_dev, ifname); 1979 if (!odev) { 1980 pr_err("no such netdevice: \"%s\"\n", ifname); 1981 return -ENODEV; 1982 } 1983 1984 if (odev->type != ARPHRD_ETHER) { 1985 pr_err("not an ethernet device: \"%s\"\n", ifname); 1986 err = -EINVAL; 1987 } else if (!netif_running(odev)) { 1988 pr_err("device is down: \"%s\"\n", ifname); 1989 err = -ENETDOWN; 1990 } else { 1991 pkt_dev->odev = odev; 1992 return 0; 1993 } 1994 1995 dev_put(odev); 1996 return err; 1997 } 1998 1999 /* Read pkt_dev from the interface and set up internal pktgen_dev 2000 * structure to have the right information to create/send packets 2001 */ 2002 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) 2003 { 2004 int ntxq; 2005 2006 if (!pkt_dev->odev) { 2007 pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n"); 2008 sprintf(pkt_dev->result, 2009 "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); 2010 return; 2011 } 2012 2013 /* make sure that we don't pick a non-existing transmit queue */ 2014 ntxq = pkt_dev->odev->real_num_tx_queues; 2015 2016 if (ntxq <= pkt_dev->queue_map_min) { 2017 pr_warning("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2018 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq, 2019 pkt_dev->odevname); 2020 pkt_dev->queue_map_min = (ntxq ?: 1) - 1; 2021 } 2022 if (pkt_dev->queue_map_max >= ntxq) { 2023 pr_warning("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n", 2024 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq, 2025 pkt_dev->odevname); 2026 pkt_dev->queue_map_max = (ntxq ?: 1) - 1; 2027 } 2028 2029 /* Default to the interface's mac if not explicitly set. */ 2030 2031 if (is_zero_ether_addr(pkt_dev->src_mac)) 2032 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN); 2033 2034 /* Set up Dest MAC */ 2035 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN); 2036 2037 if (pkt_dev->flags & F_IPV6) { 2038 int i, set = 0, err = 1; 2039 struct inet6_dev *idev; 2040 2041 if (pkt_dev->min_pkt_size == 0) { 2042 pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr) 2043 + sizeof(struct udphdr) 2044 + sizeof(struct pktgen_hdr) 2045 + pkt_dev->pkt_overhead; 2046 } 2047 2048 for (i = 0; i < IN6_ADDR_HSIZE; i++) 2049 if (pkt_dev->cur_in6_saddr.s6_addr[i]) { 2050 set = 1; 2051 break; 2052 } 2053 2054 if (!set) { 2055 2056 /* 2057 * Use linklevel address if unconfigured. 2058 * 2059 * use ipv6_get_lladdr if/when it's get exported 2060 */ 2061 2062 rcu_read_lock(); 2063 idev = __in6_dev_get(pkt_dev->odev); 2064 if (idev) { 2065 struct inet6_ifaddr *ifp; 2066 2067 read_lock_bh(&idev->lock); 2068 list_for_each_entry(ifp, &idev->addr_list, if_list) { 2069 if ((ifp->scope & IFA_LINK) && 2070 !(ifp->flags & IFA_F_TENTATIVE)) { 2071 pkt_dev->cur_in6_saddr = ifp->addr; 2072 err = 0; 2073 break; 2074 } 2075 } 2076 read_unlock_bh(&idev->lock); 2077 } 2078 rcu_read_unlock(); 2079 if (err) 2080 pr_err("ERROR: IPv6 link address not available\n"); 2081 } 2082 } else { 2083 if (pkt_dev->min_pkt_size == 0) { 2084 pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr) 2085 + sizeof(struct udphdr) 2086 + sizeof(struct pktgen_hdr) 2087 + pkt_dev->pkt_overhead; 2088 } 2089 2090 pkt_dev->saddr_min = 0; 2091 pkt_dev->saddr_max = 0; 2092 if (strlen(pkt_dev->src_min) == 0) { 2093 2094 struct in_device *in_dev; 2095 2096 rcu_read_lock(); 2097 in_dev = __in_dev_get_rcu(pkt_dev->odev); 2098 if (in_dev) { 2099 if (in_dev->ifa_list) { 2100 pkt_dev->saddr_min = 2101 in_dev->ifa_list->ifa_address; 2102 pkt_dev->saddr_max = pkt_dev->saddr_min; 2103 } 2104 } 2105 rcu_read_unlock(); 2106 } else { 2107 pkt_dev->saddr_min = in_aton(pkt_dev->src_min); 2108 pkt_dev->saddr_max = in_aton(pkt_dev->src_max); 2109 } 2110 2111 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); 2112 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); 2113 } 2114 /* Initialize current values. */ 2115 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; 2116 if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size) 2117 pkt_dev->max_pkt_size = pkt_dev->min_pkt_size; 2118 2119 pkt_dev->cur_dst_mac_offset = 0; 2120 pkt_dev->cur_src_mac_offset = 0; 2121 pkt_dev->cur_saddr = pkt_dev->saddr_min; 2122 pkt_dev->cur_daddr = pkt_dev->daddr_min; 2123 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2124 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2125 pkt_dev->nflows = 0; 2126 } 2127 2128 2129 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until) 2130 { 2131 ktime_t start_time, end_time; 2132 s64 remaining; 2133 struct hrtimer_sleeper t; 2134 2135 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); 2136 hrtimer_set_expires(&t.timer, spin_until); 2137 2138 remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer)); 2139 if (remaining <= 0) { 2140 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2141 return; 2142 } 2143 2144 start_time = ktime_now(); 2145 if (remaining < 100000) { 2146 /* for small delays (<100us), just loop until limit is reached */ 2147 do { 2148 end_time = ktime_now(); 2149 } while (ktime_lt(end_time, spin_until)); 2150 } else { 2151 /* see do_nanosleep */ 2152 hrtimer_init_sleeper(&t, current); 2153 do { 2154 set_current_state(TASK_INTERRUPTIBLE); 2155 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS); 2156 if (!hrtimer_active(&t.timer)) 2157 t.task = NULL; 2158 2159 if (likely(t.task)) 2160 schedule(); 2161 2162 hrtimer_cancel(&t.timer); 2163 } while (t.task && pkt_dev->running && !signal_pending(current)); 2164 __set_current_state(TASK_RUNNING); 2165 end_time = ktime_now(); 2166 } 2167 2168 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time)); 2169 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay); 2170 } 2171 2172 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev) 2173 { 2174 pkt_dev->pkt_overhead = 0; 2175 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32); 2176 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev); 2177 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev); 2178 } 2179 2180 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow) 2181 { 2182 return !!(pkt_dev->flows[flow].flags & F_INIT); 2183 } 2184 2185 static inline int f_pick(struct pktgen_dev *pkt_dev) 2186 { 2187 int flow = pkt_dev->curfl; 2188 2189 if (pkt_dev->flags & F_FLOW_SEQ) { 2190 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) { 2191 /* reset time */ 2192 pkt_dev->flows[flow].count = 0; 2193 pkt_dev->flows[flow].flags = 0; 2194 pkt_dev->curfl += 1; 2195 if (pkt_dev->curfl >= pkt_dev->cflows) 2196 pkt_dev->curfl = 0; /*reset */ 2197 } 2198 } else { 2199 flow = random32() % pkt_dev->cflows; 2200 pkt_dev->curfl = flow; 2201 2202 if (pkt_dev->flows[flow].count > pkt_dev->lflow) { 2203 pkt_dev->flows[flow].count = 0; 2204 pkt_dev->flows[flow].flags = 0; 2205 } 2206 } 2207 2208 return pkt_dev->curfl; 2209 } 2210 2211 2212 #ifdef CONFIG_XFRM 2213 /* If there was already an IPSEC SA, we keep it as is, else 2214 * we go look for it ... 2215 */ 2216 #define DUMMY_MARK 0 2217 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow) 2218 { 2219 struct xfrm_state *x = pkt_dev->flows[flow].x; 2220 if (!x) { 2221 /*slow path: we dont already have xfrm_state*/ 2222 x = xfrm_stateonly_find(&init_net, DUMMY_MARK, 2223 (xfrm_address_t *)&pkt_dev->cur_daddr, 2224 (xfrm_address_t *)&pkt_dev->cur_saddr, 2225 AF_INET, 2226 pkt_dev->ipsmode, 2227 pkt_dev->ipsproto, 0); 2228 if (x) { 2229 pkt_dev->flows[flow].x = x; 2230 set_pkt_overhead(pkt_dev); 2231 pkt_dev->pkt_overhead += x->props.header_len; 2232 } 2233 2234 } 2235 } 2236 #endif 2237 static void set_cur_queue_map(struct pktgen_dev *pkt_dev) 2238 { 2239 2240 if (pkt_dev->flags & F_QUEUE_MAP_CPU) 2241 pkt_dev->cur_queue_map = smp_processor_id(); 2242 2243 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) { 2244 __u16 t; 2245 if (pkt_dev->flags & F_QUEUE_MAP_RND) { 2246 t = random32() % 2247 (pkt_dev->queue_map_max - 2248 pkt_dev->queue_map_min + 1) 2249 + pkt_dev->queue_map_min; 2250 } else { 2251 t = pkt_dev->cur_queue_map + 1; 2252 if (t > pkt_dev->queue_map_max) 2253 t = pkt_dev->queue_map_min; 2254 } 2255 pkt_dev->cur_queue_map = t; 2256 } 2257 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues; 2258 } 2259 2260 /* Increment/randomize headers according to flags and current values 2261 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst 2262 */ 2263 static void mod_cur_headers(struct pktgen_dev *pkt_dev) 2264 { 2265 __u32 imn; 2266 __u32 imx; 2267 int flow = 0; 2268 2269 if (pkt_dev->cflows) 2270 flow = f_pick(pkt_dev); 2271 2272 /* Deal with source MAC */ 2273 if (pkt_dev->src_mac_count > 1) { 2274 __u32 mc; 2275 __u32 tmp; 2276 2277 if (pkt_dev->flags & F_MACSRC_RND) 2278 mc = random32() % pkt_dev->src_mac_count; 2279 else { 2280 mc = pkt_dev->cur_src_mac_offset++; 2281 if (pkt_dev->cur_src_mac_offset >= 2282 pkt_dev->src_mac_count) 2283 pkt_dev->cur_src_mac_offset = 0; 2284 } 2285 2286 tmp = pkt_dev->src_mac[5] + (mc & 0xFF); 2287 pkt_dev->hh[11] = tmp; 2288 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2289 pkt_dev->hh[10] = tmp; 2290 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2291 pkt_dev->hh[9] = tmp; 2292 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2293 pkt_dev->hh[8] = tmp; 2294 tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); 2295 pkt_dev->hh[7] = tmp; 2296 } 2297 2298 /* Deal with Destination MAC */ 2299 if (pkt_dev->dst_mac_count > 1) { 2300 __u32 mc; 2301 __u32 tmp; 2302 2303 if (pkt_dev->flags & F_MACDST_RND) 2304 mc = random32() % pkt_dev->dst_mac_count; 2305 2306 else { 2307 mc = pkt_dev->cur_dst_mac_offset++; 2308 if (pkt_dev->cur_dst_mac_offset >= 2309 pkt_dev->dst_mac_count) { 2310 pkt_dev->cur_dst_mac_offset = 0; 2311 } 2312 } 2313 2314 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); 2315 pkt_dev->hh[5] = tmp; 2316 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); 2317 pkt_dev->hh[4] = tmp; 2318 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); 2319 pkt_dev->hh[3] = tmp; 2320 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); 2321 pkt_dev->hh[2] = tmp; 2322 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); 2323 pkt_dev->hh[1] = tmp; 2324 } 2325 2326 if (pkt_dev->flags & F_MPLS_RND) { 2327 unsigned int i; 2328 for (i = 0; i < pkt_dev->nr_labels; i++) 2329 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM) 2330 pkt_dev->labels[i] = MPLS_STACK_BOTTOM | 2331 ((__force __be32)random32() & 2332 htonl(0x000fffff)); 2333 } 2334 2335 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) { 2336 pkt_dev->vlan_id = random32() & (4096-1); 2337 } 2338 2339 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) { 2340 pkt_dev->svlan_id = random32() & (4096 - 1); 2341 } 2342 2343 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { 2344 if (pkt_dev->flags & F_UDPSRC_RND) 2345 pkt_dev->cur_udp_src = random32() % 2346 (pkt_dev->udp_src_max - pkt_dev->udp_src_min) 2347 + pkt_dev->udp_src_min; 2348 2349 else { 2350 pkt_dev->cur_udp_src++; 2351 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) 2352 pkt_dev->cur_udp_src = pkt_dev->udp_src_min; 2353 } 2354 } 2355 2356 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { 2357 if (pkt_dev->flags & F_UDPDST_RND) { 2358 pkt_dev->cur_udp_dst = random32() % 2359 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min) 2360 + pkt_dev->udp_dst_min; 2361 } else { 2362 pkt_dev->cur_udp_dst++; 2363 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) 2364 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; 2365 } 2366 } 2367 2368 if (!(pkt_dev->flags & F_IPV6)) { 2369 2370 imn = ntohl(pkt_dev->saddr_min); 2371 imx = ntohl(pkt_dev->saddr_max); 2372 if (imn < imx) { 2373 __u32 t; 2374 if (pkt_dev->flags & F_IPSRC_RND) 2375 t = random32() % (imx - imn) + imn; 2376 else { 2377 t = ntohl(pkt_dev->cur_saddr); 2378 t++; 2379 if (t > imx) 2380 t = imn; 2381 2382 } 2383 pkt_dev->cur_saddr = htonl(t); 2384 } 2385 2386 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) { 2387 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; 2388 } else { 2389 imn = ntohl(pkt_dev->daddr_min); 2390 imx = ntohl(pkt_dev->daddr_max); 2391 if (imn < imx) { 2392 __u32 t; 2393 __be32 s; 2394 if (pkt_dev->flags & F_IPDST_RND) { 2395 2396 t = random32() % (imx - imn) + imn; 2397 s = htonl(t); 2398 2399 while (ipv4_is_loopback(s) || 2400 ipv4_is_multicast(s) || 2401 ipv4_is_lbcast(s) || 2402 ipv4_is_zeronet(s) || 2403 ipv4_is_local_multicast(s)) { 2404 t = random32() % (imx - imn) + imn; 2405 s = htonl(t); 2406 } 2407 pkt_dev->cur_daddr = s; 2408 } else { 2409 t = ntohl(pkt_dev->cur_daddr); 2410 t++; 2411 if (t > imx) { 2412 t = imn; 2413 } 2414 pkt_dev->cur_daddr = htonl(t); 2415 } 2416 } 2417 if (pkt_dev->cflows) { 2418 pkt_dev->flows[flow].flags |= F_INIT; 2419 pkt_dev->flows[flow].cur_daddr = 2420 pkt_dev->cur_daddr; 2421 #ifdef CONFIG_XFRM 2422 if (pkt_dev->flags & F_IPSEC_ON) 2423 get_ipsec_sa(pkt_dev, flow); 2424 #endif 2425 pkt_dev->nflows++; 2426 } 2427 } 2428 } else { /* IPV6 * */ 2429 2430 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 && 2431 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 && 2432 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 && 2433 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ; 2434 else { 2435 int i; 2436 2437 /* Only random destinations yet */ 2438 2439 for (i = 0; i < 4; i++) { 2440 pkt_dev->cur_in6_daddr.s6_addr32[i] = 2441 (((__force __be32)random32() | 2442 pkt_dev->min_in6_daddr.s6_addr32[i]) & 2443 pkt_dev->max_in6_daddr.s6_addr32[i]); 2444 } 2445 } 2446 } 2447 2448 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { 2449 __u32 t; 2450 if (pkt_dev->flags & F_TXSIZE_RND) { 2451 t = random32() % 2452 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size) 2453 + pkt_dev->min_pkt_size; 2454 } else { 2455 t = pkt_dev->cur_pkt_size + 1; 2456 if (t > pkt_dev->max_pkt_size) 2457 t = pkt_dev->min_pkt_size; 2458 } 2459 pkt_dev->cur_pkt_size = t; 2460 } 2461 2462 set_cur_queue_map(pkt_dev); 2463 2464 pkt_dev->flows[flow].count++; 2465 } 2466 2467 2468 #ifdef CONFIG_XFRM 2469 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev) 2470 { 2471 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2472 int err = 0; 2473 2474 if (!x) 2475 return 0; 2476 /* XXX: we dont support tunnel mode for now until 2477 * we resolve the dst issue */ 2478 if (x->props.mode != XFRM_MODE_TRANSPORT) 2479 return 0; 2480 2481 spin_lock(&x->lock); 2482 2483 err = x->outer_mode->output(x, skb); 2484 if (err) 2485 goto error; 2486 err = x->type->output(x, skb); 2487 if (err) 2488 goto error; 2489 2490 x->curlft.bytes += skb->len; 2491 x->curlft.packets++; 2492 error: 2493 spin_unlock(&x->lock); 2494 return err; 2495 } 2496 2497 static void free_SAs(struct pktgen_dev *pkt_dev) 2498 { 2499 if (pkt_dev->cflows) { 2500 /* let go of the SAs if we have them */ 2501 int i; 2502 for (i = 0; i < pkt_dev->cflows; i++) { 2503 struct xfrm_state *x = pkt_dev->flows[i].x; 2504 if (x) { 2505 xfrm_state_put(x); 2506 pkt_dev->flows[i].x = NULL; 2507 } 2508 } 2509 } 2510 } 2511 2512 static int process_ipsec(struct pktgen_dev *pkt_dev, 2513 struct sk_buff *skb, __be16 protocol) 2514 { 2515 if (pkt_dev->flags & F_IPSEC_ON) { 2516 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x; 2517 int nhead = 0; 2518 if (x) { 2519 int ret; 2520 __u8 *eth; 2521 nhead = x->props.header_len - skb_headroom(skb); 2522 if (nhead > 0) { 2523 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC); 2524 if (ret < 0) { 2525 pr_err("Error expanding ipsec packet %d\n", 2526 ret); 2527 goto err; 2528 } 2529 } 2530 2531 /* ipsec is not expecting ll header */ 2532 skb_pull(skb, ETH_HLEN); 2533 ret = pktgen_output_ipsec(skb, pkt_dev); 2534 if (ret) { 2535 pr_err("Error creating ipsec packet %d\n", ret); 2536 goto err; 2537 } 2538 /* restore ll */ 2539 eth = (__u8 *) skb_push(skb, ETH_HLEN); 2540 memcpy(eth, pkt_dev->hh, 12); 2541 *(u16 *) ð[12] = protocol; 2542 } 2543 } 2544 return 1; 2545 err: 2546 kfree_skb(skb); 2547 return 0; 2548 } 2549 #endif 2550 2551 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev) 2552 { 2553 unsigned int i; 2554 for (i = 0; i < pkt_dev->nr_labels; i++) 2555 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM; 2556 2557 mpls--; 2558 *mpls |= MPLS_STACK_BOTTOM; 2559 } 2560 2561 static inline __be16 build_tci(unsigned int id, unsigned int cfi, 2562 unsigned int prio) 2563 { 2564 return htons(id | (cfi << 12) | (prio << 13)); 2565 } 2566 2567 static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb, 2568 int datalen) 2569 { 2570 struct timeval timestamp; 2571 struct pktgen_hdr *pgh; 2572 2573 pgh = (struct pktgen_hdr *)skb_put(skb, sizeof(*pgh)); 2574 datalen -= sizeof(*pgh); 2575 2576 if (pkt_dev->nfrags <= 0) { 2577 memset(skb_put(skb, datalen), 0, datalen); 2578 } else { 2579 int frags = pkt_dev->nfrags; 2580 int i, len; 2581 int frag_len; 2582 2583 2584 if (frags > MAX_SKB_FRAGS) 2585 frags = MAX_SKB_FRAGS; 2586 len = datalen - frags * PAGE_SIZE; 2587 if (len > 0) { 2588 memset(skb_put(skb, len), 0, len); 2589 datalen = frags * PAGE_SIZE; 2590 } 2591 2592 i = 0; 2593 frag_len = (datalen/frags) < PAGE_SIZE ? 2594 (datalen/frags) : PAGE_SIZE; 2595 while (datalen > 0) { 2596 if (unlikely(!pkt_dev->page)) { 2597 int node = numa_node_id(); 2598 2599 if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE)) 2600 node = pkt_dev->node; 2601 pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0); 2602 if (!pkt_dev->page) 2603 break; 2604 } 2605 get_page(pkt_dev->page); 2606 skb_frag_set_page(skb, i, pkt_dev->page); 2607 skb_shinfo(skb)->frags[i].page_offset = 0; 2608 /*last fragment, fill rest of data*/ 2609 if (i == (frags - 1)) 2610 skb_frag_size_set(&skb_shinfo(skb)->frags[i], 2611 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE)); 2612 else 2613 skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len); 2614 datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]); 2615 skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]); 2616 skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]); 2617 i++; 2618 skb_shinfo(skb)->nr_frags = i; 2619 } 2620 } 2621 2622 /* Stamp the time, and sequence number, 2623 * convert them to network byte order 2624 */ 2625 pgh->pgh_magic = htonl(PKTGEN_MAGIC); 2626 pgh->seq_num = htonl(pkt_dev->seq_num); 2627 2628 do_gettimeofday(×tamp); 2629 pgh->tv_sec = htonl(timestamp.tv_sec); 2630 pgh->tv_usec = htonl(timestamp.tv_usec); 2631 } 2632 2633 static struct sk_buff *fill_packet_ipv4(struct net_device *odev, 2634 struct pktgen_dev *pkt_dev) 2635 { 2636 struct sk_buff *skb = NULL; 2637 __u8 *eth; 2638 struct udphdr *udph; 2639 int datalen, iplen; 2640 struct iphdr *iph; 2641 __be16 protocol = htons(ETH_P_IP); 2642 __be32 *mpls; 2643 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2644 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2645 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2646 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2647 u16 queue_map; 2648 2649 if (pkt_dev->nr_labels) 2650 protocol = htons(ETH_P_MPLS_UC); 2651 2652 if (pkt_dev->vlan_id != 0xffff) 2653 protocol = htons(ETH_P_8021Q); 2654 2655 /* Update any of the values, used when we're incrementing various 2656 * fields. 2657 */ 2658 mod_cur_headers(pkt_dev); 2659 queue_map = pkt_dev->cur_queue_map; 2660 2661 datalen = (odev->hard_header_len + 16) & ~0xf; 2662 2663 if (pkt_dev->flags & F_NODE) { 2664 int node; 2665 2666 if (pkt_dev->node >= 0) 2667 node = pkt_dev->node; 2668 else 2669 node = numa_node_id(); 2670 2671 skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64 2672 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node); 2673 if (likely(skb)) { 2674 skb_reserve(skb, NET_SKB_PAD); 2675 skb->dev = odev; 2676 } 2677 } 2678 else 2679 skb = __netdev_alloc_skb(odev, 2680 pkt_dev->cur_pkt_size + 64 2681 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT); 2682 2683 if (!skb) { 2684 sprintf(pkt_dev->result, "No memory"); 2685 return NULL; 2686 } 2687 prefetchw(skb->data); 2688 2689 skb_reserve(skb, datalen); 2690 2691 /* Reserve for ethernet and IP header */ 2692 eth = (__u8 *) skb_push(skb, 14); 2693 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2694 if (pkt_dev->nr_labels) 2695 mpls_push(mpls, pkt_dev); 2696 2697 if (pkt_dev->vlan_id != 0xffff) { 2698 if (pkt_dev->svlan_id != 0xffff) { 2699 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2700 *svlan_tci = build_tci(pkt_dev->svlan_id, 2701 pkt_dev->svlan_cfi, 2702 pkt_dev->svlan_p); 2703 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2704 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2705 } 2706 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2707 *vlan_tci = build_tci(pkt_dev->vlan_id, 2708 pkt_dev->vlan_cfi, 2709 pkt_dev->vlan_p); 2710 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2711 *vlan_encapsulated_proto = htons(ETH_P_IP); 2712 } 2713 2714 skb->network_header = skb->tail; 2715 skb->transport_header = skb->network_header + sizeof(struct iphdr); 2716 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr)); 2717 skb_set_queue_mapping(skb, queue_map); 2718 skb->priority = pkt_dev->skb_priority; 2719 2720 iph = ip_hdr(skb); 2721 udph = udp_hdr(skb); 2722 2723 memcpy(eth, pkt_dev->hh, 12); 2724 *(__be16 *) & eth[12] = protocol; 2725 2726 /* Eth + IPh + UDPh + mpls */ 2727 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 - 2728 pkt_dev->pkt_overhead; 2729 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) 2730 datalen = sizeof(struct pktgen_hdr); 2731 2732 udph->source = htons(pkt_dev->cur_udp_src); 2733 udph->dest = htons(pkt_dev->cur_udp_dst); 2734 udph->len = htons(datalen + 8); /* DATA + udphdr */ 2735 udph->check = 0; /* No checksum */ 2736 2737 iph->ihl = 5; 2738 iph->version = 4; 2739 iph->ttl = 32; 2740 iph->tos = pkt_dev->tos; 2741 iph->protocol = IPPROTO_UDP; /* UDP */ 2742 iph->saddr = pkt_dev->cur_saddr; 2743 iph->daddr = pkt_dev->cur_daddr; 2744 iph->id = htons(pkt_dev->ip_id); 2745 pkt_dev->ip_id++; 2746 iph->frag_off = 0; 2747 iplen = 20 + 8 + datalen; 2748 iph->tot_len = htons(iplen); 2749 iph->check = 0; 2750 iph->check = ip_fast_csum((void *)iph, iph->ihl); 2751 skb->protocol = protocol; 2752 skb->mac_header = (skb->network_header - ETH_HLEN - 2753 pkt_dev->pkt_overhead); 2754 skb->dev = odev; 2755 skb->pkt_type = PACKET_HOST; 2756 pktgen_finalize_skb(pkt_dev, skb, datalen); 2757 2758 #ifdef CONFIG_XFRM 2759 if (!process_ipsec(pkt_dev, skb, protocol)) 2760 return NULL; 2761 #endif 2762 2763 return skb; 2764 } 2765 2766 static struct sk_buff *fill_packet_ipv6(struct net_device *odev, 2767 struct pktgen_dev *pkt_dev) 2768 { 2769 struct sk_buff *skb = NULL; 2770 __u8 *eth; 2771 struct udphdr *udph; 2772 int datalen; 2773 struct ipv6hdr *iph; 2774 __be16 protocol = htons(ETH_P_IPV6); 2775 __be32 *mpls; 2776 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */ 2777 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */ 2778 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */ 2779 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */ 2780 u16 queue_map; 2781 2782 if (pkt_dev->nr_labels) 2783 protocol = htons(ETH_P_MPLS_UC); 2784 2785 if (pkt_dev->vlan_id != 0xffff) 2786 protocol = htons(ETH_P_8021Q); 2787 2788 /* Update any of the values, used when we're incrementing various 2789 * fields. 2790 */ 2791 mod_cur_headers(pkt_dev); 2792 queue_map = pkt_dev->cur_queue_map; 2793 2794 skb = __netdev_alloc_skb(odev, 2795 pkt_dev->cur_pkt_size + 64 2796 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT); 2797 if (!skb) { 2798 sprintf(pkt_dev->result, "No memory"); 2799 return NULL; 2800 } 2801 prefetchw(skb->data); 2802 2803 skb_reserve(skb, 16); 2804 2805 /* Reserve for ethernet and IP header */ 2806 eth = (__u8 *) skb_push(skb, 14); 2807 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32)); 2808 if (pkt_dev->nr_labels) 2809 mpls_push(mpls, pkt_dev); 2810 2811 if (pkt_dev->vlan_id != 0xffff) { 2812 if (pkt_dev->svlan_id != 0xffff) { 2813 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2814 *svlan_tci = build_tci(pkt_dev->svlan_id, 2815 pkt_dev->svlan_cfi, 2816 pkt_dev->svlan_p); 2817 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2818 *svlan_encapsulated_proto = htons(ETH_P_8021Q); 2819 } 2820 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16)); 2821 *vlan_tci = build_tci(pkt_dev->vlan_id, 2822 pkt_dev->vlan_cfi, 2823 pkt_dev->vlan_p); 2824 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16)); 2825 *vlan_encapsulated_proto = htons(ETH_P_IPV6); 2826 } 2827 2828 skb->network_header = skb->tail; 2829 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr); 2830 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr)); 2831 skb_set_queue_mapping(skb, queue_map); 2832 skb->priority = pkt_dev->skb_priority; 2833 iph = ipv6_hdr(skb); 2834 udph = udp_hdr(skb); 2835 2836 memcpy(eth, pkt_dev->hh, 12); 2837 *(__be16 *) ð[12] = protocol; 2838 2839 /* Eth + IPh + UDPh + mpls */ 2840 datalen = pkt_dev->cur_pkt_size - 14 - 2841 sizeof(struct ipv6hdr) - sizeof(struct udphdr) - 2842 pkt_dev->pkt_overhead; 2843 2844 if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) { 2845 datalen = sizeof(struct pktgen_hdr); 2846 net_info_ratelimited("increased datalen to %d\n", datalen); 2847 } 2848 2849 udph->source = htons(pkt_dev->cur_udp_src); 2850 udph->dest = htons(pkt_dev->cur_udp_dst); 2851 udph->len = htons(datalen + sizeof(struct udphdr)); 2852 udph->check = 0; /* No checksum */ 2853 2854 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */ 2855 2856 if (pkt_dev->traffic_class) { 2857 /* Version + traffic class + flow (0) */ 2858 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20)); 2859 } 2860 2861 iph->hop_limit = 32; 2862 2863 iph->payload_len = htons(sizeof(struct udphdr) + datalen); 2864 iph->nexthdr = IPPROTO_UDP; 2865 2866 iph->daddr = pkt_dev->cur_in6_daddr; 2867 iph->saddr = pkt_dev->cur_in6_saddr; 2868 2869 skb->mac_header = (skb->network_header - ETH_HLEN - 2870 pkt_dev->pkt_overhead); 2871 skb->protocol = protocol; 2872 skb->dev = odev; 2873 skb->pkt_type = PACKET_HOST; 2874 2875 pktgen_finalize_skb(pkt_dev, skb, datalen); 2876 2877 return skb; 2878 } 2879 2880 static struct sk_buff *fill_packet(struct net_device *odev, 2881 struct pktgen_dev *pkt_dev) 2882 { 2883 if (pkt_dev->flags & F_IPV6) 2884 return fill_packet_ipv6(odev, pkt_dev); 2885 else 2886 return fill_packet_ipv4(odev, pkt_dev); 2887 } 2888 2889 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) 2890 { 2891 pkt_dev->seq_num = 1; 2892 pkt_dev->idle_acc = 0; 2893 pkt_dev->sofar = 0; 2894 pkt_dev->tx_bytes = 0; 2895 pkt_dev->errors = 0; 2896 } 2897 2898 /* Set up structure for sending pkts, clear counters */ 2899 2900 static void pktgen_run(struct pktgen_thread *t) 2901 { 2902 struct pktgen_dev *pkt_dev; 2903 int started = 0; 2904 2905 func_enter(); 2906 2907 if_lock(t); 2908 list_for_each_entry(pkt_dev, &t->if_list, list) { 2909 2910 /* 2911 * setup odev and create initial packet. 2912 */ 2913 pktgen_setup_inject(pkt_dev); 2914 2915 if (pkt_dev->odev) { 2916 pktgen_clear_counters(pkt_dev); 2917 pkt_dev->running = 1; /* Cranke yeself! */ 2918 pkt_dev->skb = NULL; 2919 pkt_dev->started_at = 2920 pkt_dev->next_tx = ktime_now(); 2921 2922 set_pkt_overhead(pkt_dev); 2923 2924 strcpy(pkt_dev->result, "Starting"); 2925 started++; 2926 } else 2927 strcpy(pkt_dev->result, "Error starting"); 2928 } 2929 if_unlock(t); 2930 if (started) 2931 t->control &= ~(T_STOP); 2932 } 2933 2934 static void pktgen_stop_all_threads_ifs(void) 2935 { 2936 struct pktgen_thread *t; 2937 2938 func_enter(); 2939 2940 mutex_lock(&pktgen_thread_lock); 2941 2942 list_for_each_entry(t, &pktgen_threads, th_list) 2943 t->control |= T_STOP; 2944 2945 mutex_unlock(&pktgen_thread_lock); 2946 } 2947 2948 static int thread_is_running(const struct pktgen_thread *t) 2949 { 2950 const struct pktgen_dev *pkt_dev; 2951 2952 list_for_each_entry(pkt_dev, &t->if_list, list) 2953 if (pkt_dev->running) 2954 return 1; 2955 return 0; 2956 } 2957 2958 static int pktgen_wait_thread_run(struct pktgen_thread *t) 2959 { 2960 if_lock(t); 2961 2962 while (thread_is_running(t)) { 2963 2964 if_unlock(t); 2965 2966 msleep_interruptible(100); 2967 2968 if (signal_pending(current)) 2969 goto signal; 2970 if_lock(t); 2971 } 2972 if_unlock(t); 2973 return 1; 2974 signal: 2975 return 0; 2976 } 2977 2978 static int pktgen_wait_all_threads_run(void) 2979 { 2980 struct pktgen_thread *t; 2981 int sig = 1; 2982 2983 mutex_lock(&pktgen_thread_lock); 2984 2985 list_for_each_entry(t, &pktgen_threads, th_list) { 2986 sig = pktgen_wait_thread_run(t); 2987 if (sig == 0) 2988 break; 2989 } 2990 2991 if (sig == 0) 2992 list_for_each_entry(t, &pktgen_threads, th_list) 2993 t->control |= (T_STOP); 2994 2995 mutex_unlock(&pktgen_thread_lock); 2996 return sig; 2997 } 2998 2999 static void pktgen_run_all_threads(void) 3000 { 3001 struct pktgen_thread *t; 3002 3003 func_enter(); 3004 3005 mutex_lock(&pktgen_thread_lock); 3006 3007 list_for_each_entry(t, &pktgen_threads, th_list) 3008 t->control |= (T_RUN); 3009 3010 mutex_unlock(&pktgen_thread_lock); 3011 3012 /* Propagate thread->control */ 3013 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3014 3015 pktgen_wait_all_threads_run(); 3016 } 3017 3018 static void pktgen_reset_all_threads(void) 3019 { 3020 struct pktgen_thread *t; 3021 3022 func_enter(); 3023 3024 mutex_lock(&pktgen_thread_lock); 3025 3026 list_for_each_entry(t, &pktgen_threads, th_list) 3027 t->control |= (T_REMDEVALL); 3028 3029 mutex_unlock(&pktgen_thread_lock); 3030 3031 /* Propagate thread->control */ 3032 schedule_timeout_interruptible(msecs_to_jiffies(125)); 3033 3034 pktgen_wait_all_threads_run(); 3035 } 3036 3037 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 3038 { 3039 __u64 bps, mbps, pps; 3040 char *p = pkt_dev->result; 3041 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at, 3042 pkt_dev->started_at); 3043 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc); 3044 3045 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", 3046 (unsigned long long)ktime_to_us(elapsed), 3047 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)), 3048 (unsigned long long)ktime_to_us(idle), 3049 (unsigned long long)pkt_dev->sofar, 3050 pkt_dev->cur_pkt_size, nr_frags); 3051 3052 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC, 3053 ktime_to_ns(elapsed)); 3054 3055 bps = pps * 8 * pkt_dev->cur_pkt_size; 3056 3057 mbps = bps; 3058 do_div(mbps, 1000000); 3059 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", 3060 (unsigned long long)pps, 3061 (unsigned long long)mbps, 3062 (unsigned long long)bps, 3063 (unsigned long long)pkt_dev->errors); 3064 } 3065 3066 /* Set stopped-at timer, remove from running list, do counters & statistics */ 3067 static int pktgen_stop_device(struct pktgen_dev *pkt_dev) 3068 { 3069 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1; 3070 3071 if (!pkt_dev->running) { 3072 pr_warning("interface: %s is already stopped\n", 3073 pkt_dev->odevname); 3074 return -EINVAL; 3075 } 3076 3077 kfree_skb(pkt_dev->skb); 3078 pkt_dev->skb = NULL; 3079 pkt_dev->stopped_at = ktime_now(); 3080 pkt_dev->running = 0; 3081 3082 show_results(pkt_dev, nr_frags); 3083 3084 return 0; 3085 } 3086 3087 static struct pktgen_dev *next_to_run(struct pktgen_thread *t) 3088 { 3089 struct pktgen_dev *pkt_dev, *best = NULL; 3090 3091 if_lock(t); 3092 3093 list_for_each_entry(pkt_dev, &t->if_list, list) { 3094 if (!pkt_dev->running) 3095 continue; 3096 if (best == NULL) 3097 best = pkt_dev; 3098 else if (ktime_lt(pkt_dev->next_tx, best->next_tx)) 3099 best = pkt_dev; 3100 } 3101 if_unlock(t); 3102 return best; 3103 } 3104 3105 static void pktgen_stop(struct pktgen_thread *t) 3106 { 3107 struct pktgen_dev *pkt_dev; 3108 3109 func_enter(); 3110 3111 if_lock(t); 3112 3113 list_for_each_entry(pkt_dev, &t->if_list, list) { 3114 pktgen_stop_device(pkt_dev); 3115 } 3116 3117 if_unlock(t); 3118 } 3119 3120 /* 3121 * one of our devices needs to be removed - find it 3122 * and remove it 3123 */ 3124 static void pktgen_rem_one_if(struct pktgen_thread *t) 3125 { 3126 struct list_head *q, *n; 3127 struct pktgen_dev *cur; 3128 3129 func_enter(); 3130 3131 if_lock(t); 3132 3133 list_for_each_safe(q, n, &t->if_list) { 3134 cur = list_entry(q, struct pktgen_dev, list); 3135 3136 if (!cur->removal_mark) 3137 continue; 3138 3139 kfree_skb(cur->skb); 3140 cur->skb = NULL; 3141 3142 pktgen_remove_device(t, cur); 3143 3144 break; 3145 } 3146 3147 if_unlock(t); 3148 } 3149 3150 static void pktgen_rem_all_ifs(struct pktgen_thread *t) 3151 { 3152 struct list_head *q, *n; 3153 struct pktgen_dev *cur; 3154 3155 func_enter(); 3156 3157 /* Remove all devices, free mem */ 3158 3159 if_lock(t); 3160 3161 list_for_each_safe(q, n, &t->if_list) { 3162 cur = list_entry(q, struct pktgen_dev, list); 3163 3164 kfree_skb(cur->skb); 3165 cur->skb = NULL; 3166 3167 pktgen_remove_device(t, cur); 3168 } 3169 3170 if_unlock(t); 3171 } 3172 3173 static void pktgen_rem_thread(struct pktgen_thread *t) 3174 { 3175 /* Remove from the thread list */ 3176 3177 remove_proc_entry(t->tsk->comm, pg_proc_dir); 3178 3179 } 3180 3181 static void pktgen_resched(struct pktgen_dev *pkt_dev) 3182 { 3183 ktime_t idle_start = ktime_now(); 3184 schedule(); 3185 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3186 } 3187 3188 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev) 3189 { 3190 ktime_t idle_start = ktime_now(); 3191 3192 while (atomic_read(&(pkt_dev->skb->users)) != 1) { 3193 if (signal_pending(current)) 3194 break; 3195 3196 if (need_resched()) 3197 pktgen_resched(pkt_dev); 3198 else 3199 cpu_relax(); 3200 } 3201 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start)); 3202 } 3203 3204 static void pktgen_xmit(struct pktgen_dev *pkt_dev) 3205 { 3206 struct net_device *odev = pkt_dev->odev; 3207 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *) 3208 = odev->netdev_ops->ndo_start_xmit; 3209 struct netdev_queue *txq; 3210 u16 queue_map; 3211 int ret; 3212 3213 /* If device is offline, then don't send */ 3214 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) { 3215 pktgen_stop_device(pkt_dev); 3216 return; 3217 } 3218 3219 /* This is max DELAY, this has special meaning of 3220 * "never transmit" 3221 */ 3222 if (unlikely(pkt_dev->delay == ULLONG_MAX)) { 3223 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX); 3224 return; 3225 } 3226 3227 /* If no skb or clone count exhausted then get new one */ 3228 if (!pkt_dev->skb || (pkt_dev->last_ok && 3229 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) { 3230 /* build a new pkt */ 3231 kfree_skb(pkt_dev->skb); 3232 3233 pkt_dev->skb = fill_packet(odev, pkt_dev); 3234 if (pkt_dev->skb == NULL) { 3235 pr_err("ERROR: couldn't allocate skb in fill_packet\n"); 3236 schedule(); 3237 pkt_dev->clone_count--; /* back out increment, OOM */ 3238 return; 3239 } 3240 pkt_dev->last_pkt_size = pkt_dev->skb->len; 3241 pkt_dev->allocated_skbs++; 3242 pkt_dev->clone_count = 0; /* reset counter */ 3243 } 3244 3245 if (pkt_dev->delay && pkt_dev->last_ok) 3246 spin(pkt_dev, pkt_dev->next_tx); 3247 3248 queue_map = skb_get_queue_mapping(pkt_dev->skb); 3249 txq = netdev_get_tx_queue(odev, queue_map); 3250 3251 __netif_tx_lock_bh(txq); 3252 3253 if (unlikely(netif_xmit_frozen_or_stopped(txq))) { 3254 ret = NETDEV_TX_BUSY; 3255 pkt_dev->last_ok = 0; 3256 goto unlock; 3257 } 3258 atomic_inc(&(pkt_dev->skb->users)); 3259 ret = (*xmit)(pkt_dev->skb, odev); 3260 3261 switch (ret) { 3262 case NETDEV_TX_OK: 3263 txq_trans_update(txq); 3264 pkt_dev->last_ok = 1; 3265 pkt_dev->sofar++; 3266 pkt_dev->seq_num++; 3267 pkt_dev->tx_bytes += pkt_dev->last_pkt_size; 3268 break; 3269 case NET_XMIT_DROP: 3270 case NET_XMIT_CN: 3271 case NET_XMIT_POLICED: 3272 /* skb has been consumed */ 3273 pkt_dev->errors++; 3274 break; 3275 default: /* Drivers are not supposed to return other values! */ 3276 net_info_ratelimited("%s xmit error: %d\n", 3277 pkt_dev->odevname, ret); 3278 pkt_dev->errors++; 3279 /* fallthru */ 3280 case NETDEV_TX_LOCKED: 3281 case NETDEV_TX_BUSY: 3282 /* Retry it next time */ 3283 atomic_dec(&(pkt_dev->skb->users)); 3284 pkt_dev->last_ok = 0; 3285 } 3286 unlock: 3287 __netif_tx_unlock_bh(txq); 3288 3289 /* If pkt_dev->count is zero, then run forever */ 3290 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { 3291 pktgen_wait_for_skb(pkt_dev); 3292 3293 /* Done with this */ 3294 pktgen_stop_device(pkt_dev); 3295 } 3296 } 3297 3298 /* 3299 * Main loop of the thread goes here 3300 */ 3301 3302 static int pktgen_thread_worker(void *arg) 3303 { 3304 DEFINE_WAIT(wait); 3305 struct pktgen_thread *t = arg; 3306 struct pktgen_dev *pkt_dev = NULL; 3307 int cpu = t->cpu; 3308 3309 BUG_ON(smp_processor_id() != cpu); 3310 3311 init_waitqueue_head(&t->queue); 3312 complete(&t->start_done); 3313 3314 pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current)); 3315 3316 set_current_state(TASK_INTERRUPTIBLE); 3317 3318 set_freezable(); 3319 3320 while (!kthread_should_stop()) { 3321 pkt_dev = next_to_run(t); 3322 3323 if (unlikely(!pkt_dev && t->control == 0)) { 3324 if (pktgen_exiting) 3325 break; 3326 wait_event_interruptible_timeout(t->queue, 3327 t->control != 0, 3328 HZ/10); 3329 try_to_freeze(); 3330 continue; 3331 } 3332 3333 __set_current_state(TASK_RUNNING); 3334 3335 if (likely(pkt_dev)) { 3336 pktgen_xmit(pkt_dev); 3337 3338 if (need_resched()) 3339 pktgen_resched(pkt_dev); 3340 else 3341 cpu_relax(); 3342 } 3343 3344 if (t->control & T_STOP) { 3345 pktgen_stop(t); 3346 t->control &= ~(T_STOP); 3347 } 3348 3349 if (t->control & T_RUN) { 3350 pktgen_run(t); 3351 t->control &= ~(T_RUN); 3352 } 3353 3354 if (t->control & T_REMDEVALL) { 3355 pktgen_rem_all_ifs(t); 3356 t->control &= ~(T_REMDEVALL); 3357 } 3358 3359 if (t->control & T_REMDEV) { 3360 pktgen_rem_one_if(t); 3361 t->control &= ~(T_REMDEV); 3362 } 3363 3364 try_to_freeze(); 3365 3366 set_current_state(TASK_INTERRUPTIBLE); 3367 } 3368 3369 pr_debug("%s stopping all device\n", t->tsk->comm); 3370 pktgen_stop(t); 3371 3372 pr_debug("%s removing all device\n", t->tsk->comm); 3373 pktgen_rem_all_ifs(t); 3374 3375 pr_debug("%s removing thread\n", t->tsk->comm); 3376 pktgen_rem_thread(t); 3377 3378 /* Wait for kthread_stop */ 3379 while (!kthread_should_stop()) { 3380 set_current_state(TASK_INTERRUPTIBLE); 3381 schedule(); 3382 } 3383 __set_current_state(TASK_RUNNING); 3384 3385 return 0; 3386 } 3387 3388 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, 3389 const char *ifname, bool exact) 3390 { 3391 struct pktgen_dev *p, *pkt_dev = NULL; 3392 size_t len = strlen(ifname); 3393 3394 if_lock(t); 3395 list_for_each_entry(p, &t->if_list, list) 3396 if (strncmp(p->odevname, ifname, len) == 0) { 3397 if (p->odevname[len]) { 3398 if (exact || p->odevname[len] != '@') 3399 continue; 3400 } 3401 pkt_dev = p; 3402 break; 3403 } 3404 3405 if_unlock(t); 3406 pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev); 3407 return pkt_dev; 3408 } 3409 3410 /* 3411 * Adds a dev at front of if_list. 3412 */ 3413 3414 static int add_dev_to_thread(struct pktgen_thread *t, 3415 struct pktgen_dev *pkt_dev) 3416 { 3417 int rv = 0; 3418 3419 if_lock(t); 3420 3421 if (pkt_dev->pg_thread) { 3422 pr_err("ERROR: already assigned to a thread\n"); 3423 rv = -EBUSY; 3424 goto out; 3425 } 3426 3427 list_add(&pkt_dev->list, &t->if_list); 3428 pkt_dev->pg_thread = t; 3429 pkt_dev->running = 0; 3430 3431 out: 3432 if_unlock(t); 3433 return rv; 3434 } 3435 3436 /* Called under thread lock */ 3437 3438 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) 3439 { 3440 struct pktgen_dev *pkt_dev; 3441 int err; 3442 int node = cpu_to_node(t->cpu); 3443 3444 /* We don't allow a device to be on several threads */ 3445 3446 pkt_dev = __pktgen_NN_threads(ifname, FIND); 3447 if (pkt_dev) { 3448 pr_err("ERROR: interface already used\n"); 3449 return -EBUSY; 3450 } 3451 3452 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node); 3453 if (!pkt_dev) 3454 return -ENOMEM; 3455 3456 strcpy(pkt_dev->odevname, ifname); 3457 pkt_dev->flows = vzalloc_node(MAX_CFLOWS * sizeof(struct flow_state), 3458 node); 3459 if (pkt_dev->flows == NULL) { 3460 kfree(pkt_dev); 3461 return -ENOMEM; 3462 } 3463 3464 pkt_dev->removal_mark = 0; 3465 pkt_dev->nfrags = 0; 3466 pkt_dev->delay = pg_delay_d; 3467 pkt_dev->count = pg_count_d; 3468 pkt_dev->sofar = 0; 3469 pkt_dev->udp_src_min = 9; /* sink port */ 3470 pkt_dev->udp_src_max = 9; 3471 pkt_dev->udp_dst_min = 9; 3472 pkt_dev->udp_dst_max = 9; 3473 pkt_dev->vlan_p = 0; 3474 pkt_dev->vlan_cfi = 0; 3475 pkt_dev->vlan_id = 0xffff; 3476 pkt_dev->svlan_p = 0; 3477 pkt_dev->svlan_cfi = 0; 3478 pkt_dev->svlan_id = 0xffff; 3479 pkt_dev->node = -1; 3480 3481 err = pktgen_setup_dev(pkt_dev, ifname); 3482 if (err) 3483 goto out1; 3484 if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING) 3485 pkt_dev->clone_skb = pg_clone_skb_d; 3486 3487 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir, 3488 &pktgen_if_fops, pkt_dev); 3489 if (!pkt_dev->entry) { 3490 pr_err("cannot create %s/%s procfs entry\n", 3491 PG_PROC_DIR, ifname); 3492 err = -EINVAL; 3493 goto out2; 3494 } 3495 #ifdef CONFIG_XFRM 3496 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT; 3497 pkt_dev->ipsproto = IPPROTO_ESP; 3498 #endif 3499 3500 return add_dev_to_thread(t, pkt_dev); 3501 out2: 3502 dev_put(pkt_dev->odev); 3503 out1: 3504 #ifdef CONFIG_XFRM 3505 free_SAs(pkt_dev); 3506 #endif 3507 vfree(pkt_dev->flows); 3508 kfree(pkt_dev); 3509 return err; 3510 } 3511 3512 static int __init pktgen_create_thread(int cpu) 3513 { 3514 struct pktgen_thread *t; 3515 struct proc_dir_entry *pe; 3516 struct task_struct *p; 3517 3518 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL, 3519 cpu_to_node(cpu)); 3520 if (!t) { 3521 pr_err("ERROR: out of memory, can't create new thread\n"); 3522 return -ENOMEM; 3523 } 3524 3525 spin_lock_init(&t->if_lock); 3526 t->cpu = cpu; 3527 3528 INIT_LIST_HEAD(&t->if_list); 3529 3530 list_add_tail(&t->th_list, &pktgen_threads); 3531 init_completion(&t->start_done); 3532 3533 p = kthread_create_on_node(pktgen_thread_worker, 3534 t, 3535 cpu_to_node(cpu), 3536 "kpktgend_%d", cpu); 3537 if (IS_ERR(p)) { 3538 pr_err("kernel_thread() failed for cpu %d\n", t->cpu); 3539 list_del(&t->th_list); 3540 kfree(t); 3541 return PTR_ERR(p); 3542 } 3543 kthread_bind(p, cpu); 3544 t->tsk = p; 3545 3546 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir, 3547 &pktgen_thread_fops, t); 3548 if (!pe) { 3549 pr_err("cannot create %s/%s procfs entry\n", 3550 PG_PROC_DIR, t->tsk->comm); 3551 kthread_stop(p); 3552 list_del(&t->th_list); 3553 kfree(t); 3554 return -EINVAL; 3555 } 3556 3557 wake_up_process(p); 3558 wait_for_completion(&t->start_done); 3559 3560 return 0; 3561 } 3562 3563 /* 3564 * Removes a device from the thread if_list. 3565 */ 3566 static void _rem_dev_from_if_list(struct pktgen_thread *t, 3567 struct pktgen_dev *pkt_dev) 3568 { 3569 struct list_head *q, *n; 3570 struct pktgen_dev *p; 3571 3572 list_for_each_safe(q, n, &t->if_list) { 3573 p = list_entry(q, struct pktgen_dev, list); 3574 if (p == pkt_dev) 3575 list_del(&p->list); 3576 } 3577 } 3578 3579 static int pktgen_remove_device(struct pktgen_thread *t, 3580 struct pktgen_dev *pkt_dev) 3581 { 3582 3583 pr_debug("remove_device pkt_dev=%p\n", pkt_dev); 3584 3585 if (pkt_dev->running) { 3586 pr_warning("WARNING: trying to remove a running interface, stopping it now\n"); 3587 pktgen_stop_device(pkt_dev); 3588 } 3589 3590 /* Dis-associate from the interface */ 3591 3592 if (pkt_dev->odev) { 3593 dev_put(pkt_dev->odev); 3594 pkt_dev->odev = NULL; 3595 } 3596 3597 /* And update the thread if_list */ 3598 3599 _rem_dev_from_if_list(t, pkt_dev); 3600 3601 if (pkt_dev->entry) 3602 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir); 3603 3604 #ifdef CONFIG_XFRM 3605 free_SAs(pkt_dev); 3606 #endif 3607 vfree(pkt_dev->flows); 3608 if (pkt_dev->page) 3609 put_page(pkt_dev->page); 3610 kfree(pkt_dev); 3611 return 0; 3612 } 3613 3614 static int __init pg_init(void) 3615 { 3616 int cpu; 3617 struct proc_dir_entry *pe; 3618 int ret = 0; 3619 3620 pr_info("%s", version); 3621 3622 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net); 3623 if (!pg_proc_dir) 3624 return -ENODEV; 3625 3626 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops); 3627 if (pe == NULL) { 3628 pr_err("ERROR: cannot create %s procfs entry\n", PGCTRL); 3629 ret = -EINVAL; 3630 goto remove_dir; 3631 } 3632 3633 register_netdevice_notifier(&pktgen_notifier_block); 3634 3635 for_each_online_cpu(cpu) { 3636 int err; 3637 3638 err = pktgen_create_thread(cpu); 3639 if (err) 3640 pr_warning("WARNING: Cannot create thread for cpu %d (%d)\n", 3641 cpu, err); 3642 } 3643 3644 if (list_empty(&pktgen_threads)) { 3645 pr_err("ERROR: Initialization failed for all threads\n"); 3646 ret = -ENODEV; 3647 goto unregister; 3648 } 3649 3650 return 0; 3651 3652 unregister: 3653 unregister_netdevice_notifier(&pktgen_notifier_block); 3654 remove_proc_entry(PGCTRL, pg_proc_dir); 3655 remove_dir: 3656 proc_net_remove(&init_net, PG_PROC_DIR); 3657 return ret; 3658 } 3659 3660 static void __exit pg_cleanup(void) 3661 { 3662 struct pktgen_thread *t; 3663 struct list_head *q, *n; 3664 LIST_HEAD(list); 3665 3666 /* Stop all interfaces & threads */ 3667 pktgen_exiting = true; 3668 3669 mutex_lock(&pktgen_thread_lock); 3670 list_splice_init(&pktgen_threads, &list); 3671 mutex_unlock(&pktgen_thread_lock); 3672 3673 list_for_each_safe(q, n, &list) { 3674 t = list_entry(q, struct pktgen_thread, th_list); 3675 list_del(&t->th_list); 3676 kthread_stop(t->tsk); 3677 kfree(t); 3678 } 3679 3680 /* Un-register us from receiving netdevice events */ 3681 unregister_netdevice_notifier(&pktgen_notifier_block); 3682 3683 /* Clean up proc file system */ 3684 remove_proc_entry(PGCTRL, pg_proc_dir); 3685 proc_net_remove(&init_net, PG_PROC_DIR); 3686 } 3687 3688 module_init(pg_init); 3689 module_exit(pg_cleanup); 3690 3691 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>"); 3692 MODULE_DESCRIPTION("Packet Generator tool"); 3693 MODULE_LICENSE("GPL"); 3694 MODULE_VERSION(VERSION); 3695 module_param(pg_count_d, int, 0); 3696 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject"); 3697 module_param(pg_delay_d, int, 0); 3698 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)"); 3699 module_param(pg_clone_skb_d, int, 0); 3700 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet"); 3701 module_param(debug, int, 0); 3702 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module"); 3703